Changed msync to actually sync

This copies xnbd's style

CONTRIBUTING.md

@@ -1,24 +0,0 @@
-# Contribution guide
-
-The code is formatted using the K&R style of "indent".
-
-```
-indent -kr <files go here>
-```
-
-The C unit tests have also been indented in the same way, but manually adjsted
-such that the functions follow the normal libcheck layout.
-
-```c
-START_TEST( ... ) {
-
-
-}
-END TEST
-```
-
-Indent tends to mangle the `END_TEST` macro, so that will need adjusting if
-`indent` is run over the test files again.
-
-
-

Makefile

@@ -12,6 +12,11 @@ else
 	CFLAGS_EXTRA=-O2
 endif
 
+NO_MSYNC=1
+ifdef NO_MSYNC
+	CFLAGS_EXTRA += -DNO_MSYNC
+endif
+
 CFLAGS_EXTRA  += -fPIC --std=gnu99
 LDFLAGS_EXTRA += -Wl,--relax,--gc-sections -L$(LIB) -Wl,-rpath-link,$(LIB)
 
@@ -109,6 +114,7 @@ install:
 clean:
 	rm -rf build/*
 
+
 .PHONY: clean objs check_objs all server proxy check_bins check doc build test acceptance
 
 # Include extra dependencies at the end, NOT before 'all'

debian/changelog

@@ -1,36 +1,10 @@
-flexnbd (0.3.0) stable; urgency=medium
+flexnbd (0.1.8) UNRELEASED; urgency=medium
 
-  * Force a msync after every write, ignoring FUA flag, or lack thereof (!51).
-
- -- Patrick J Cherry <patrick@bytemark.co.uk>  Tue, 24 Apr 2018 12:05:43 +0100
-
-flexnbd (0.2.0) stable; urgency=medium
-
-  [ James Carter ]
   * Set TCP keepalive on sockets so broken connections are reaped (#33, !33,
     !36)
   * Add a context to logs to make debugging problems easier (#34, !34)
 
-  [ Chris Cottam ]
-  * Increased NBD_MAX_SIZE from 1MB to 32MB for qemu 2.11 (!35)
-
-  [ Patrick J Cherry ]
-  * Added FLUSH and FUA support (!38) 
-  * Server returns ENOSPC in response to writes beyond the end of the
-    filesystem, and EINVAL to unknown commands. (#36, !40)
-  * Proxy passes all NBD protocol errors through to the client instead of
-    disconnecting and retrying (#36, !40)
-  * Fix struct types in readwrite.c (#35, !41)
-  * Ignore ends of discs that stray outside of 512-byte sector sizes (!42). 
-  * Tweak logging for readloop failures (!44)
-  * Alter semantics of NBD_MAX_BLOCK_SIZE to remove struct size overheads when
-    calculating if a request exceeds the max block size (!45)
-  * Added tests for setting TCP_NODELAY on upstream-reconnections in the
-    proxy, and refactored the other LD_PRELOAD tests (!43)
-  * Clean up dead threads before calculating the number of connected clients
-    on the status command (!46)
-
- -- Patrick J Cherry <patrick@bytemark.co.uk>  Tue, 20 Feb 2018 11:43:22 +0000
+ -- James Carter <james.carter@bytemark.co.uk>  Thu, 11 Jan 2018 10:05:35 +0000
 
 flexnbd (0.1.7) stable; urgency=medium
 

src/common/ioutil.c

@@ -45,7 +45,8 @@ int build_allocation_map(struct bitset *allocation_map, int fd)
 		if ( ioctl( fd, FS_IOC_FIEMAP, fiemap ) < 0 ) {
 			debug( "Couldn't get fiemap, returning no allocation_map" );
 			return 0; /* it's up to the caller to free the map */
-	} else {
+		}
+		else {
 			for ( unsigned int i = 0; i < fiemap->fm_mapped_extents; i++ ) {
 				bitset_set_range( allocation_map,
 						  fiemap->fm_extents[i].fe_logical,
@@ -57,10 +58,12 @@ int build_allocation_map(struct bitset *allocation_map, int fd)
 			 * if we've actually hit max_offsets.
 			 */
 			if (fiemap->fm_mapped_extents > 0) {
-		struct fiemap_extent *last =
-		    &fiemap->fm_extents[fiemap->fm_mapped_extents - 1];
+				struct fiemap_extent *last = &fiemap->fm_extents[
+					fiemap->fm_mapped_extents-1
+				];
 				offset = last->fe_logical + last->fe_length;
-	    } else {
+			}
+			else {
 				offset += fiemap->fm_length;
 			}
 		}
@@ -70,9 +73,7 @@ int build_allocation_map(struct bitset *allocation_map, int fd)
 	return 1;
 }
 
-
-int open_and_mmap(const char *filename, int *out_fd, uint64_t * out_size,
-		  void **out_map)
+int open_and_mmap(const char* filename, int* out_fd, uint64_t *out_size, void **out_map)
 {
 	/* 
 	 * size and out_size are intentionally of different types.
@@ -83,7 +84,7 @@ int open_and_mmap(const char *filename, int *out_fd, uint64_t * out_size,
 	off64_t size;
 
 	/* O_DIRECT should not be used with mmap() */
-    *out_fd = open(filename, O_RDWR | O_NOATIME);
+	*out_fd = open(filename, O_RDWR | O_SYNC );
 
 	if (*out_fd < 1) {
 		warn("open(%s) failed: does it exist?", filename);
@@ -95,29 +96,20 @@ int open_and_mmap(const char *filename, int *out_fd, uint64_t * out_size,
 		warn("lseek64() failed");
 		return size;
 	}
-
-    /* If discs are not in multiples of 512, then odd things happen,
-     * resulting in reads/writes past the ends of files.
-     */
-    if (size != (size & (~0x1ff))) {
-	warn("file does not fit into 512-byte sectors; the end of the file will be ignored.");
-	size &= ~0x1ff;
-    }
-
 	if (out_size) {
 		*out_size = size;
 	}
 
-    if (out_map) {
+	if (0) {
 		*out_map = mmap64(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED,
 		  *out_fd, 0);
 		if (((long) *out_map) == -1) {
 			warn("mmap64() failed");
 			return -1;
 		}
-	debug("opened %s size %ld on fd %d @ %p", filename, size, *out_fd,
-	      *out_map);
-    } else {
+		debug("opened %s size %ld on fd %d @ %p", filename, size, *out_fd, *out_map);
+	}
+	else {
 		debug("opened %s size %ld on fd %d", filename, size, *out_fd);
 	}
 
@@ -148,8 +140,7 @@ int readloop(int filedes, void *buffer, size_t size)
 		ssize_t result = read(filedes, buffer+readden, size-readden);
 
 		if ( result == 0 /* EOF */ ) {
-	    warn("end-of-file detected while reading after %i bytes",
-		 readden);
+			warn( "end-of-file detected while reading after %i bytes", readden );
 			return -1;
 		}
 
@@ -169,9 +160,7 @@ int sendfileloop(int out_fd, int in_fd, off64_t * offset, size_t count)
 	size_t sent=0;
 	while (sent < count) {
 		ssize_t result = sendfile64(out_fd, in_fd, offset, count-sent);
-	debug
-	    ("sendfile64(out_fd=%d, in_fd=%d, offset=%p, count-sent=%ld) = %ld",
-	     out_fd, in_fd, offset, count - sent, result);
+		debug("sendfile64(out_fd=%d, in_fd=%d, offset=%p, count-sent=%ld) = %ld", out_fd, in_fd, offset, count-sent, result);
 
 		if (result == -1) {
 			debug( "%s (%i) calling sendfile64()", strerror(errno), errno );
@@ -185,8 +174,7 @@ int sendfileloop(int out_fd, int in_fd, off64_t * offset, size_t count)
 }
 
 #include <errno.h>
-ssize_t spliceloop(int fd_in, loff_t * off_in, int fd_out,
-		   loff_t * off_out, size_t len, unsigned int flags2)
+ssize_t spliceloop(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out, size_t len, unsigned int flags2)
 {
 	const unsigned int flags = SPLICE_F_MORE|SPLICE_F_MOVE|flags2;
 	size_t spliced=0;
@@ -194,13 +182,13 @@ ssize_t spliceloop(int fd_in, loff_t * off_in, int fd_out,
 	//debug("spliceloop(%d, %ld, %d, %ld, %ld)", fd_in, off_in ? *off_in : 0, fd_out, off_out ? *off_out : 0, len);
 
 	while (spliced < len) {
-	ssize_t result =
-	    splice(fd_in, off_in, fd_out, off_out, len, flags);
+		ssize_t result = splice(fd_in, off_in, fd_out, off_out, len, flags);
 		if (result < 0) {
 			//debug("result=%ld (%s), spliced=%ld, len=%ld", result, strerror(errno), spliced, len);
 			if (errno == EAGAIN && (flags & SPLICE_F_NONBLOCK) ) {
 				return spliced;
-	    } else {
+			}
+			else {
 				return -1;
 			}
 		} else {
@@ -224,19 +212,13 @@ int splice_via_pipe_loop(int fd_in, int fd_out, size_t len)
 
 	while (spliced < len) {
 		ssize_t run = len-spliced;
-	ssize_t s2, s1 =
-	    spliceloop(fd_in, NULL, pipefd[1], NULL, run,
-		       SPLICE_F_NONBLOCK);
+		ssize_t s2, s1 = spliceloop(fd_in, NULL, pipefd[1], NULL, run, SPLICE_F_NONBLOCK);
 		/*if (run > 65535)
 			run = 65535;*/
-	if (s1 < 0) {
-	    break;
-	}
+		if (s1 < 0) { break; }
 
 		s2 = spliceloop(pipefd[0], NULL, fd_out, NULL, s1, 0);
-	if (s2 < 0) {
-	    break;
-	}
+		if (s2 < 0) { break; }
 		spliced += s2;
 	}
 	close(pipefd[0]);
@@ -258,9 +240,7 @@ int read_until_newline(int fd, char *buf, int bufsize)
 
 	for (cur=0; cur < bufsize; cur++) {
 		int result = read(fd, buf+cur, 1);
-	if (result <= 0) {
-	    return -1;
-	}
+		if (result <= 0) { return -1; }
 		if (buf[cur] == 10) {
 			buf[cur] = '\0';
 			break;
@@ -285,9 +265,7 @@ int read_lines_until_blankline(int fd, int max_line_length, char ***lines)
 		 * -1 for an eof
 		 * -1 for a read error
 		 */
-	if (readden <= 1) {
-	    return lines_count;
-	}
+		if (readden <= 1) { return lines_count; }
 		*lines = xrealloc(*lines, (lines_count+1) * sizeof(char*));
 		(*lines)[lines_count] = strdup(line);
 		if ((*lines)[lines_count][0] == 0) {
@@ -325,8 +303,7 @@ ssize_t iobuf_read(int fd, struct iobuf * iobuf, size_t default_size)
 	}
 
 	left = iobuf->size - iobuf->needle;
-    debug("Reading %" PRIu32 " of %" PRIu32 " bytes from fd %i", left,
-	  iobuf->size, fd);
+	debug( "Reading %"PRIu32" of %"PRIu32" bytes from fd %i", left, iobuf->size, fd );
 
 	count = read( fd, iobuf->buf + iobuf->needle, left );
 
@@ -354,8 +331,7 @@ ssize_t iobuf_write(int fd, struct iobuf * iobuf)
 	size_t left = iobuf->size - iobuf->needle;
 	ssize_t count;
 
-    debug("Writing %" PRIu32 " of %" PRIu32 " bytes to fd %i", left,
-	  iobuf->size, fd);
+	debug( "Writing %"PRIu32" of %"PRIu32" bytes to fd %i", left, iobuf->size, fd );
 	count = write( fd, iobuf->buf + iobuf->needle, left );
 
 	if ( count >= 0 ) {
@@ -372,3 +348,36 @@ ssize_t iobuf_write(int fd, struct iobuf * iobuf)
 
 	return count;
 }
+
+struct iommap *iommap_alloc(int fd, off64_t from, uint64_t len) {
+
+	off66_t mmap_from = from & ~((off64_t) getpagesize() - 1);
+        uint64_t mmap_len = len + (from - mmap_from);
+        void *mmap_buf = NULL;
+
+	// TODO: Check the error code from mmap64
+	if(mmap_len)
+		mmap_buf = mmap64(NULL, mmap_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, mmap_from);
+
+	struct iommap *im = xmalloc(sizeof(struct iommap ));
+
+	im->mmap_buf = mmap_buf;
+	im->mmap_len = mmap_len;
+	im->buf = (char *) mmap_buf + from - mmap_from;
+	debug("mmapped file from %ld:%d", mmap_from, mmap_len);
+	return im;
+}
+
+void iommap_sync(struct iommap *im) {
+        if (im->mmap_len)
+		msync(im->mmap_buf, im->mmap_len, MS_SYNC | MS_INVALIDATE);
+	return;
+}
+
+void iommap_free(struct iommap *im) {
+        if (im->mmap_len)
+		munmap(im->mmap_buf, im->mmap_len);
+
+	free(im);
+}
+

src/common/ioutil.h

@@ -11,7 +11,20 @@ struct iobuf {
 ssize_t iobuf_read( int fd, struct iobuf* iobuf, size_t default_size );
 ssize_t iobuf_write( int fd, struct iobuf* iobuf );
 
+#include <inttypes.h>
+
+struct iommap {
+	char *buf;
+	char *mmap_buf;
+	uint64_t mmap_len;
+};
+
+struct iommap *iommap_alloc(int fd, off64_t from, uint64_t len);
+void   iommap_sync(struct iommap *im);
+void   iommap_free(struct iommap *im);
+
 #include "serve.h"
+
 struct bitset; /* don't need whole of bitset.h here */
 
 /** Scan the file opened in ''fd'', set bits in ''allocation_map''  that
@@ -38,8 +51,7 @@ int readloop(int filedes, void *buffer, size_t size);
 int sendfileloop(int out_fd, int in_fd, off64_t *offset, size_t count);
 
 /** Repeat a splice() operation until we have 'len' bytes. */
-ssize_t spliceloop(int fd_in, loff_t * off_in, int fd_out,
-		   loff_t * off_out, size_t len, unsigned int flags2);
+ssize_t spliceloop(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out, size_t len, unsigned int flags2);
 
 /** Copy ''len'' bytes from ''fd_in'' to ''fd_out'' by creating a temporary
   * pipe and using the Linux splice call repeatedly until it has transferred
@@ -66,8 +78,7 @@ int read_lines_until_blankline(int fd, int max_line_length, char ***lines);
   * ''out_size'' and the address of the mmap in ''out_map''.  If anything goes
   * wrong, returns -1 setting errno, otherwise 0.
   */
-int open_and_mmap(const char *filename, int *out_fd, uint64_t * out_size,
-		  void **out_map);
+int open_and_mmap( const char* filename, int* out_fd, uint64_t* out_size, void **out_map);
 
 
 /** Check to see whether the given file descriptor is closed.
@@ -75,3 +86,4 @@ int open_and_mmap(const char *filename, int *out_fd, uint64_t * out_size,
 int fd_is_closed( int fd_in );
 
 #endif
+

src/common/mode.h

@@ -94,3 +94,4 @@ void mode(char *mode, int argc, char **argv);
 char * help_help_text;
 
 #endif
+

src/common/nbdtypes.c

@@ -13,7 +13,6 @@ void nbd_r2h_init(struct nbd_init_raw *from, struct nbd_init *to)
 	memcpy( to->passwd, from->passwd, 8 );
 	to->magic = be64toh( from->magic );
 	to->size = be64toh( from->size );
-    to->flags = be32toh(from->flags);
 }
 
 void nbd_h2r_init( struct nbd_init * from, struct nbd_init_raw * to)
@@ -21,41 +20,39 @@ void nbd_h2r_init(struct nbd_init *from, struct nbd_init_raw *to)
 	memcpy( to->passwd, from->passwd, 8 );
 	to->magic = htobe64( from->magic );
 	to->size = htobe64( from->size );
-    to->flags = htobe32(from->flags);
 }
 
 
 void nbd_r2h_request( struct nbd_request_raw *from, struct nbd_request * to )
-{
-    to->magic = be32toh(from->magic);
-    to->flags = be16toh(from->flags);
-    to->type = be16toh(from->type);
-    to->handle.w = from->handle.w;
-    to->from = be64toh(from->from);
-    to->len = be32toh(from->len);
-}
-
-void nbd_h2r_request(struct nbd_request *from, struct nbd_request_raw *to)
 {
 	to->magic = htobe32( from->magic );
-    to->flags = htobe16(from->flags);
-    to->type = htobe16(from->type);
+	to->type = htobe32( from->type );
 	to->handle.w = from->handle.w;
 	to->from = htobe64( from->from );
 	to->len = htobe32( from->len );
 }
 
+void nbd_h2r_request( struct nbd_request * from, struct nbd_request_raw * to )
+{
+	to->magic = be32toh( from->magic );
+	to->type = be32toh( from->type );
+	to->handle.w = from->handle.w;
+	to->from = be64toh( from->from );
+	to->len = be32toh( from->len );
+}
+
 
 void nbd_r2h_reply( struct nbd_reply_raw * from, struct nbd_reply * to )
+{
+	to->magic = htobe32( from->magic );
+	to->error = htobe32( from->error );
+	to->handle.w = from->handle.w;
+}
+
+void nbd_h2r_reply( struct nbd_reply * from, struct nbd_reply_raw * to )
 {
 	to->magic = be32toh( from->magic );
 	to->error = be32toh( from->error );
 	to->handle.w = from->handle.w;
 }
 
-void nbd_h2r_reply(struct nbd_reply *from, struct nbd_reply_raw *to)
-{
-    to->magic = htobe32(from->magic);
-    to->error = htobe32(from->error);
-    to->handle.w = from->handle.w;
-}

src/common/nbdtypes.h

@@ -7,38 +7,15 @@
 #define INIT_MAGIC 0x0000420281861253
 #define REQUEST_MAGIC 0x25609513
 #define REPLY_MAGIC 0x67446698
-
 #define REQUEST_READ 0
 #define REQUEST_WRITE 1
 #define REQUEST_DISCONNECT 2
-#define REQUEST_FLUSH 3
 
-/* values for transmission flag field */
-#define FLAG_HAS_FLAGS	(1 << 0)	/* Flags are there */
-#define FLAG_SEND_FLUSH	(1 << 2)	/* Send FLUSH */
-#define FLAG_SEND_FUA	(1 << 3)	/* Send FUA (Force Unit Access) */
-
-/* values for command flag field */
-#define CMD_FLAG_FUA     (1 << 0)
-
-#if 0
-/* Not yet implemented by flexnbd */
-#define REQUEST_TRIM 4
-#define REQUEST_WRITE_ZEROES 6
-
-#define FLAG_READ_ONLY	(1 << 1)	/* Device is read-only */
-#define FLAG_ROTATIONAL	(1 << 4)	/* Use elevator algorithm - rotational media */
-#define FLAG_SEND_TRIM	(1 << 5)	/* Send TRIM (discard) */
-#define FLAG_SEND_WRITE_ZEROES (1 << 6)	/* Send NBD_CMD_WRITE_ZEROES */
-#define FLAG_CAN_MULTI_CONN    (1 << 8)	/* multiple connections are okay */
-
-#define CMD_FLAG_NO_HOLE (1 << 1)
-#endif
+/* The top 2 bytes of the type field are overloaded and can contain flags */
+#define REQUEST_MASK 0x0000ffff
 
 
-/* 32 MiB is the maximum qemu will send you:
- * https://github.com/qemu/qemu/blob/v2.11.0/include/block/nbd.h#L183
- */
+/* 1MiB is the de-facto standard for maximum size of header + data */
 #define NBD_MAX_SIZE ( 32 * 1024 * 1024 )
 
 #define NBD_REQUEST_SIZE ( sizeof( struct nbd_request_raw ) )
@@ -61,14 +38,12 @@ struct nbd_init_raw {
 	char passwd[8];
 	__be64 magic;
 	__be64 size;
-    __be32 flags;
-    char reserved[124];
+	char reserved[128];
 };
 
 struct nbd_request_raw {
 	__be32 magic;
-    __be16 flags;
-    __be16 type;		/* == READ || == WRITE || == FLUSH */
+	__be32 type;    /* == READ || == WRITE  */
 	nbd_handle_t handle;
 	__be64 from;
 	__be32 len;
@@ -80,18 +55,18 @@ struct nbd_reply_raw {
 	nbd_handle_t handle;         /* handle you got from request  */
 };
 
+
+
 struct nbd_init {
 	char passwd[8];
 	uint64_t magic;
 	uint64_t size;
-    uint32_t flags;
-    char reserved[124];
+	char reserved[128];
 };
 
 struct nbd_request {
 	uint32_t magic;
-    uint16_t flags;
-    uint16_t type;		/* == READ || == WRITE || == DISCONNECT || == FLUSH */
+	uint32_t type;    /* == READ || == WRITE || == DISCONNECT */
 	nbd_handle_t handle;
 	uint64_t from;
 	uint32_t len;
@@ -112,3 +87,4 @@ void nbd_h2r_request(struct nbd_request *from, struct nbd_request_raw *to);
 void nbd_h2r_reply( struct nbd_reply * from, struct nbd_reply_raw * to );
 
 #endif
+

src/common/parse.c

@@ -22,9 +22,7 @@ int parse_ip_to_sockaddr(struct sockaddr *out, char *src)
 	/* allow user to start with [ and end with any other invalid char */
 	{
 		int i=0, j=0;
-	if (src[i] == '[') {
-	    i++;
-	}
+		if (src[i] == '[') { i++; }
 		for (; i<64 && IS_IP_VALID_CHAR(src[i]); i++) {
 			temp[j++] = src[i];
 		}
@@ -74,7 +72,8 @@ int parse_acl(struct ip_and_mask (**out)[], int max, char **entries)
 	if (max == 0) {
 		*out = NULL;
 		return 0;
-    } else {
+	}
+	else {
 		list = xmalloc(max * sizeof(struct ip_and_mask));
 		*out = (struct ip_and_mask (*)[])list;
 		debug("acl alloc: %p", *out);
@@ -89,14 +88,16 @@ int parse_acl(struct ip_and_mask (**out)[], int max, char **entries)
 			return i;
 		}
 
-	for (j = 0; entries[i][j] && entries[i][j] != '/'; j++);	// increment j!
+		for (j=0; entries[i][j] && entries[i][j] != '/'; j++)
+			; // increment j!
 
 		if (entries[i][j] == '/') {
 			outentry->mask = atoi(entries[i]+j+1);
 			if (outentry->mask < 1 || outentry->mask > MAX_MASK_BITS) {
 				return i;
 			}
-	} else {
+		}
+		else {
 			outentry->mask = MAX_MASK_BITS;
 		}
 #		undef MAX_MASK_BITS
@@ -123,3 +124,4 @@ void parse_port(char *s_port, struct sockaddr_in *out)
 	}
 	out->sin_port = htobe16( raw_port );
 }
+

src/common/parse.h

@@ -26,3 +26,4 @@ int parse_acl(struct ip_and_mask (**out)[], int max, char **entries);
 void parse_port( char *s_port, struct sockaddr_in *out );
 
 #endif
+

src/common/readwrite.c

@@ -10,9 +10,7 @@
 
 int socket_connect(struct sockaddr* to, struct sockaddr* from)
 {
-    int fd =
-	socket(to->sa_family == AF_INET ? PF_INET : PF_INET6, SOCK_STREAM,
-	       0);
+	int fd = socket(to->sa_family == AF_INET ? PF_INET : PF_INET6, SOCK_STREAM, 0);
 	if( fd < 0 ){
 		warn( "Couldn't create client socket");
 		return -1;
@@ -43,8 +41,7 @@ int socket_connect(struct sockaddr *to, struct sockaddr *from)
 	return fd;
 }
 
-int nbd_check_hello(struct nbd_init_raw *init_raw, uint64_t * out_size,
-		    uint32_t * out_flags)
+int nbd_check_hello( struct nbd_init_raw* init_raw, uint64_t* out_size )
 {
 	if ( strncmp( init_raw->passwd, INIT_PASSWD, 8 ) != 0 ) {
 		warn( "wrong passwd" );
@@ -59,18 +56,13 @@ int nbd_check_hello(struct nbd_init_raw *init_raw, uint64_t * out_size,
 		*out_size = be64toh( init_raw->size );
 	}
 
-    if (NULL != out_flags) {
-	*out_flags = be32toh(init_raw->flags);
-    }
-
 	return 1;
 fail:
 	return 0;
 
 }
 
-int socket_nbd_read_hello(int fd, uint64_t * out_size,
-			  uint32_t * out_flags)
+int socket_nbd_read_hello( int fd, uint64_t* out_size )
 {
 	struct nbd_init_raw init_raw;
 
@@ -80,18 +72,16 @@ int socket_nbd_read_hello(int fd, uint64_t * out_size,
 		return 0;
 	}
 
-    return nbd_check_hello(&init_raw, out_size, out_flags);
+	return nbd_check_hello( &init_raw, out_size );
 }
 
-void nbd_hello_to_buf(struct nbd_init_raw *buf, off64_t out_size,
-		      uint32_t out_flags)
+void nbd_hello_to_buf( struct nbd_init_raw *buf, off64_t out_size )
 {
 	struct nbd_init init;
 
 	memcpy( &init.passwd, INIT_PASSWD, 8 );
 	init.magic  = INIT_MAGIC;
 	init.size   = out_size;
-    init.flags = out_flags;
 
 	memset( buf, 0, sizeof( struct nbd_init_raw ) ); // ensure reserved is 0s
 	nbd_h2r_init( &init, buf );
@@ -99,10 +89,10 @@ void nbd_hello_to_buf(struct nbd_init_raw *buf, off64_t out_size,
 	return;
 }
 
-int socket_nbd_write_hello(int fd, off64_t out_size, uint32_t out_flags)
+int socket_nbd_write_hello(int fd, off64_t out_size)
 {
 	struct nbd_init_raw init_raw;
-    nbd_hello_to_buf(&init_raw, out_size, out_flags);
+	nbd_hello_to_buf( &init_raw, out_size );
 
 	if ( 0 > writeloop( fd, &init_raw, sizeof( init_raw ) ) ) {
 		warn( SHOW_ERRNO( "failed to write hello to socket" ) );
@@ -111,25 +101,20 @@ int socket_nbd_write_hello(int fd, off64_t out_size, uint32_t out_flags)
 	return 1;
 }
 
-void fill_request(struct nbd_request_raw *request_raw, uint16_t type,
-		  uint16_t flags, uint64_t from, uint32_t len)
+void fill_request(struct nbd_request *request, int type, uint64_t from, uint32_t len)
 {
-    request_raw->magic = htobe32(REQUEST_MAGIC);
-    request_raw->type = htobe16(type);
-    request_raw->flags = htobe16(flags);
-    request_raw->handle.w =
-	(((uint64_t) rand()) << 32) | ((uint64_t) rand());
-    request_raw->from = htobe64(from);
-    request_raw->len = htobe32(len);
+	request->magic  = htobe32(REQUEST_MAGIC);
+	request->type   = htobe32(type);
+	request->handle.w = (((uint64_t)rand()) << 32) | ((uint64_t)rand());
+	request->from   = htobe64(from);
+	request->len    = htobe32(len);
 }
 
-void read_reply(int fd, uint64_t request_raw_handle,
-		struct nbd_reply *reply)
+void read_reply(int fd, struct nbd_request *request, struct nbd_reply *reply)
 {
 	struct nbd_reply_raw reply_raw;
 
-    ERROR_IF_NEGATIVE(readloop
-		      (fd, &reply_raw, sizeof(struct nbd_reply_raw)),
+	ERROR_IF_NEGATIVE(readloop(fd, &reply_raw, sizeof(struct nbd_reply_raw)),
 	  "Couldn't read reply");
 
 	nbd_r2h_reply( &reply_raw, reply );
@@ -140,7 +125,7 @@ void read_reply(int fd, uint64_t request_raw_handle,
 	if (reply->error != 0) {
 		error("Server replied with error %d", reply->error);
 	}
-    if (request_raw_handle != reply_raw.handle.w) {
+	if (request->handle.w != reply->handle.w) {
 		error("Did not reply with correct handle");
 	}
 }
@@ -154,77 +139,81 @@ void wait_for_data(int fd, int timeout_secs)
 	FD_ZERO( &fds );
 	FD_SET( fd, &fds );
 
-    selected =
-	sock_try_select(FD_SETSIZE, &fds, NULL, NULL,
-			timeout_secs >= 0 ? &tv : NULL);
+	selected = sock_try_select(
+		FD_SETSIZE, &fds, NULL, NULL, timeout_secs >=0 ? &tv : NULL
+	);
 
 	FATAL_IF( -1 == selected, "Select failed" );
 	ERROR_IF(  0 == selected, "Timed out waiting for reply" );
 }
 
 
-void socket_nbd_read(int fd, uint64_t from, uint32_t len, int out_fd,
-		     void *out_buf, int timeout_secs)
+void socket_nbd_read(int fd, uint64_t from, uint32_t len, int out_fd, void* out_buf, int timeout_secs)
 {
-    struct nbd_request_raw request_raw;
+	struct nbd_request request;
 	struct nbd_reply   reply;
 
-    fill_request(&request_raw, REQUEST_READ, 0, from, len);
-    FATAL_IF_NEGATIVE(writeloop(fd, &request_raw, sizeof(request_raw)),
+	fill_request(&request, REQUEST_READ, from, len);
+	FATAL_IF_NEGATIVE(writeloop(fd, &request, sizeof(request)),
 	  "Couldn't write request");
 
-
 	wait_for_data( fd, timeout_secs );
-    read_reply(fd, request_raw.handle.w, &reply);
+	read_reply(fd, &request, &reply);
 
 	if (out_buf) {
-	FATAL_IF_NEGATIVE(readloop(fd, out_buf, len), "Read failed");
-    } else {
-	FATAL_IF_NEGATIVE(splice_via_pipe_loop(fd, out_fd, len),
-			  "Splice failed");
+		FATAL_IF_NEGATIVE(readloop(fd, out_buf, len),
+		  "Read failed");
+	}
+	else {
+		FATAL_IF_NEGATIVE(
+			splice_via_pipe_loop(fd, out_fd, len),
+			"Splice failed"
+		);
 	}
 }
 
-void socket_nbd_write(int fd, uint64_t from, uint32_t len, int in_fd,
-		      void *in_buf, int timeout_secs)
+void socket_nbd_write(int fd, uint64_t from, uint32_t len, int in_fd, void* in_buf, int timeout_secs)
 {
-    struct nbd_request_raw request_raw;
+	struct nbd_request request;
 	struct nbd_reply   reply;
 
-    fill_request(&request_raw, REQUEST_WRITE, 0, from, len);
-    ERROR_IF_NEGATIVE(writeloop(fd, &request_raw, sizeof(request_raw)),
+	fill_request(&request, REQUEST_WRITE, from, len);
+	ERROR_IF_NEGATIVE(writeloop(fd, &request, sizeof(request)),
 	  "Couldn't write request");
 
 	if (in_buf) {
-	ERROR_IF_NEGATIVE(writeloop(fd, in_buf, len), "Write failed");
-    } else {
-	ERROR_IF_NEGATIVE(splice_via_pipe_loop(in_fd, fd, len),
-			  "Splice failed");
+		ERROR_IF_NEGATIVE(writeloop(fd, in_buf, len),
+		  "Write failed");
+	}
+	else {
+		ERROR_IF_NEGATIVE(
+			splice_via_pipe_loop(in_fd, fd, len),
+			"Splice failed"
+		);
 	}
 
 	wait_for_data( fd, timeout_secs );
-    read_reply(fd, request_raw.handle.w, &reply);
+	read_reply(fd, &request, &reply);
 }
 
 
 int socket_nbd_disconnect( int fd )
 {
 	int success = 1;
-    struct nbd_request_raw request_raw;
+	struct nbd_request request;
 
-    fill_request(&request_raw, REQUEST_DISCONNECT, 0, 0, 0);
+	fill_request( &request, REQUEST_DISCONNECT, 0, 0 );
 	/* FIXME: This shouldn't be a FATAL error.  We should just drop
 	 * the mirror without affecting the main server.
 	 */
-    FATAL_IF_NEGATIVE(writeloop(fd, &request_raw, sizeof(request_raw)),
+	FATAL_IF_NEGATIVE( writeloop( fd, &request, sizeof( request ) ),
 			"Failed to write the disconnect request." );
 	return success;
 }
 
 #define CHECK_RANGE(error_type) { \
 	uint64_t size;\
-	uint32_t flags;\
-	int success = socket_nbd_read_hello(params->client, &size, &flags); \
+	int success = socket_nbd_read_hello(params->client, &size); \
 	if ( success ) {\
 		uint64_t endpoint = params->from + params->len; \
 		if (endpoint > size || \
@@ -242,9 +231,7 @@ int socket_nbd_disconnect(int fd)
 
 void do_read(struct mode_readwrite_params* params)
 {
-    params->client =
-	socket_connect(&params->connect_to.generic,
-		       &params->connect_from.generic);
+	params->client = socket_connect(&params->connect_to.generic, &params->connect_from.generic);
 	FATAL_IF_NEGATIVE( params->client, "Couldn't connect." );
 	CHECK_RANGE("read");
 	socket_nbd_read(params->client, params->from, params->len,
@@ -254,12 +241,11 @@ void do_read(struct mode_readwrite_params *params)
 
 void do_write(struct mode_readwrite_params* params)
 {
-    params->client =
-	socket_connect(&params->connect_to.generic,
-		       &params->connect_from.generic);
+	params->client = socket_connect(&params->connect_to.generic, &params->connect_from.generic);
 	FATAL_IF_NEGATIVE( params->client, "Couldn't connect." );
 	CHECK_RANGE("write");
 	socket_nbd_write(params->client, params->from, params->len,
 	  params->data_fd, NULL, 10);
 	close(params->client);
 }
+

src/common/readwrite.h

@@ -7,20 +7,17 @@
 #include "nbdtypes.h"
 
 int socket_connect(struct sockaddr* to, struct sockaddr* from);
-int socket_nbd_read_hello(int fd, uint64_t * size, uint32_t * flags);
-int socket_nbd_write_hello(int fd, uint64_t size, uint32_t flags);
-void socket_nbd_read(int fd, uint64_t from, uint32_t len, int out_fd,
-		     void *out_buf, int timeout_secs);
-void socket_nbd_write(int fd, uint64_t from, uint32_t len, int out_fd,
-		      void *out_buf, int timeout_secs);
+int socket_nbd_read_hello(int fd, uint64_t* size);
+int socket_nbd_write_hello(int fd, uint64_t size);
+void socket_nbd_read(int fd, uint64_t from, uint32_t len, int out_fd, void* out_buf, int timeout_secs);
+void socket_nbd_write(int fd, uint64_t from, uint32_t len, int out_fd, void* out_buf, int timeout_secs);
 int socket_nbd_disconnect( int fd );
 
 /* as you can see, we're slowly accumulating code that should really be in an
  * NBD library */
 
-void nbd_hello_to_buf(struct nbd_init_raw *buf, uint64_t out_size,
-		      uint32_t out_flags);
-int nbd_check_hello(struct nbd_init_raw *init_raw, uint64_t * out_size,
-		    uint32_t * out_flags);
+void nbd_hello_to_buf( struct nbd_init_raw* buf, uint64_t out_size );
+int nbd_check_hello( struct nbd_init_raw* init_raw, uint64_t* out_size );
 
 #endif
+

src/common/remote.c

@@ -24,8 +24,7 @@ void print_response(const char *response)
 	fprintf(out, "%s\n", response_text + 2);
 }
 
-void do_remote_command(char *command, char *socket_name, int argc,
-		       char **argv)
+void do_remote_command(char* command, char* socket_name, int argc, char** argv)
 {
 	char newline=10;
 	int i;
@@ -41,10 +40,10 @@ void do_remote_command(char *command, char *socket_name, int argc,
 	address.sun_family = AF_UNIX;
 	strncpy(address.sun_path, socket_name, sizeof(address.sun_path));
 
-    FATAL_IF_NEGATIVE(connect
-		      (remote, (struct sockaddr *) &address,
-		       sizeof(address)), "Couldn't connect to %s",
-		      socket_name);
+	FATAL_IF_NEGATIVE(
+		connect(remote, (struct sockaddr*) &address, sizeof(address)),
+		"Couldn't connect to %s", socket_name
+	);
 
 	write(remote, command, strlen(command));
 	write(remote, &newline, 1);
@@ -56,10 +55,13 @@ void do_remote_command(char *command, char *socket_name, int argc,
 	}
 	write(remote, &newline, 1);
 
-    FATAL_IF_NEGATIVE(read_until_newline(remote, response, max_response),
-		      "Couldn't read response from %s", socket_name);
+	FATAL_IF_NEGATIVE(
+		read_until_newline(remote, response, max_response),
+		"Couldn't read response from %s", socket_name
+	);
 
 	print_response( response );
 
 	exit(atoi(response));
 }
+

src/common/self_pipe.c

@@ -52,9 +52,7 @@ struct self_pipe *self_pipe_create(void)
 	struct self_pipe *sig = xmalloc( sizeof( struct self_pipe ) );
 	int fds[2];
 	
-    if (NULL == sig) {
-	return NULL;
-    }
+	if ( NULL == sig ) { return NULL; }
 
 	if ( pipe( fds ) ) {
 		free( sig );
@@ -62,8 +60,7 @@ struct self_pipe *self_pipe_create(void)
 		return NULL;
 	}
 
-    if (fcntl(fds[0], F_SETFL, O_NONBLOCK)
-	|| fcntl(fds[1], F_SETFL, O_NONBLOCK)) {
+	if ( fcntl( fds[0], F_SETFL, O_NONBLOCK ) || fcntl( fds[1], F_SETFL, O_NONBLOCK ) ) {
 		int fcntl_err = errno;
 		while( close( fds[0] ) == -1 && errno == EINTR );
 		while( close( fds[1] ) == -1 && errno == EINTR );

src/common/sockutil.c

@@ -29,8 +29,7 @@ size_t sockaddr_size(const struct sockaddr * sa)
 	return ret;
 }
 
-const char *sockaddr_address_string(const struct sockaddr *sa, char *dest,
-				    size_t len)
+const char* sockaddr_address_string( const struct sockaddr* sa, char* dest, size_t len )
 {
 	NULLCHECK( sa );
 	NULLCHECK( dest );
@@ -66,8 +65,7 @@ const char *sockaddr_address_string(const struct sockaddr *sa, char *dest,
 
 int sock_set_reuseaddr( int fd, int optval )
 {
-    return setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval,
-		      sizeof(optval));
+	return setsockopt( fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval) );
 }
 
 int sock_set_keepalive_params( int fd, int time, int intvl, int probes)
@@ -83,33 +81,28 @@ int sock_set_keepalive_params(int fd, int time, int intvl, int probes)
 
 int sock_set_keepalive( int fd, int optval )
 {
-    return setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &optval,
-		      sizeof(optval));
+	return setsockopt( fd, SOL_SOCKET, SO_KEEPALIVE, &optval, sizeof(optval) );
 }
 
 int sock_set_tcp_keepidle( int fd, int optval )
 {
-    return setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &optval,
-		      sizeof(optval));
+	return setsockopt( fd, IPPROTO_TCP, TCP_KEEPIDLE, &optval, sizeof(optval) );
 }
 
 int sock_set_tcp_keepintvl( int fd, int optval )
 {
-    return setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &optval,
-		      sizeof(optval));
+	return setsockopt( fd, IPPROTO_TCP, TCP_KEEPINTVL, &optval, sizeof(optval) );
 }
 
 int sock_set_tcp_keepcnt( int fd, int optval )
 {
-    return setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &optval,
-		      sizeof(optval));
+	return setsockopt( fd, IPPROTO_TCP, TCP_KEEPCNT, &optval, sizeof(optval) );
 }
 
 /* Set the tcp_nodelay option */
 int sock_set_tcp_nodelay( int fd, int optval )
 {
-    return setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &optval,
-		      sizeof(optval));
+	return setsockopt( fd, IPPROTO_TCP, TCP_NODELAY, &optval, sizeof(optval) );
 }
 
 int sock_set_tcp_cork( int fd, int optval )
@@ -147,7 +140,8 @@ int sock_try_bind(int fd, const struct sockaddr *sa)
 		if ( 0 == bind_result ) {
 			info( "Bound to %s", s_address );
 			break;
-	} else {
+		}
+		else {
 			warn( SHOW_ERRNO( "Couldn't bind to %s", s_address ) );
 
 			switch ( errno ) {
@@ -183,8 +177,7 @@ int sock_try_bind(int fd, const struct sockaddr *sa)
 	return bind_result;
 }
 
-int sock_try_select(int nfds, fd_set * readfds, fd_set * writefds,
-		    fd_set * exceptfds, struct timeval *timeout)
+int sock_try_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
 {
 	int result;
 
@@ -199,16 +192,14 @@ int sock_try_select(int nfds, fd_set * readfds, fd_set * writefds,
 	return result;
 }
 
-int sock_try_connect(int fd, struct sockaddr *to, socklen_t addrlen,
-		     int wait)
+int sock_try_connect( int fd, struct sockaddr* to, socklen_t addrlen, int wait )
 {
 	fd_set fds;
 	struct timeval tv = { wait, 0 };
 	int result = 0;
 
 	if ( sock_set_nonblock( fd, 1 ) == -1 ) {
-	warn(SHOW_ERRNO
-	     ("Failed to set socket non-blocking for connect()"));
+		warn( SHOW_ERRNO( "Failed to set socket non-blocking for connect()" ) );
 		return connect( fd, to, addrlen );
 	}
 
@@ -293,3 +284,4 @@ int sock_try_close(int fd)
 
 	return result;
 }
+

src/common/sockutil.h

@@ -12,8 +12,7 @@ size_t sockaddr_size(const struct sockaddr *sa);
 /* Convert a sockaddr into an address. Like inet_ntop, it returns dest if
  * successful, NULL otherwise. In the latter case, dest will contain "???"
  */
-const char *sockaddr_address_string(const struct sockaddr *sa, char *dest,
-				    size_t len);
+const char* sockaddr_address_string(const struct sockaddr* sa, char* dest, size_t len);
 
 /* Configure TCP keepalive on a socket */
 int sock_set_keepalive_params( int fd, int time, int intvl, int probes);
@@ -45,14 +44,13 @@ int sock_set_nonblock(int fd, int optval);
 int sock_try_bind(int fd, const struct sockaddr* sa);
 
 /* Try to call select(), retrying EINTR */
-int sock_try_select(int nfds, fd_set * readfds, fd_set * writefds,
-		    fd_set * exceptfds, struct timeval *timeout);
+int sock_try_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 
 /* Try to call connect(), timing out after wait seconds */
-int sock_try_connect(int fd, struct sockaddr *to, socklen_t addrlen,
-		     int wait);
+int sock_try_connect( int fd, struct sockaddr* to, socklen_t addrlen, int wait );
 
 /* Try to call close(), retrying EINTR */
 int sock_try_close( int fd );
 
 #endif
+

src/common/util.c

@@ -26,12 +26,10 @@ void error_handler(int fatal)
 
 	if (context) {
 		longjmp(context->jmp, fatal ? 1 : 2 );
-    } else {
-	if (fatal) {
-	    abort();
-	} else {
-	    pthread_exit((void *) 1);
 	}
+	else {
+		if ( fatal ) { abort(); }
+		else { pthread_exit((void*) 1); }
 	}
 }
 
@@ -45,9 +43,7 @@ void exit_err(const char *msg)
 
 void mylog(int line_level, const char* format, ...)
 {
-    if (line_level < log_level) {
-	return;
-    }
+	if (line_level < log_level) { return; }
 
 	va_list argptr;
 
@@ -61,7 +57,8 @@ uint64_t monotonic_time_ms()
 	struct timespec ts;
 	uint64_t seconds_ms, nanoseconds_ms;
 
-    FATAL_IF_NEGATIVE(clock_gettime(CLOCK_MONOTONIC, &ts),
+	FATAL_IF_NEGATIVE(
+		clock_gettime(CLOCK_MONOTONIC, &ts),
 		SHOW_ERRNO( "clock_gettime failed" )
 	);
 
@@ -78,8 +75,7 @@ uint64_t monotonic_time_ms()
 void* xrealloc(void* ptr, size_t size)
 {
 	void* p = realloc(ptr, size);
-    FATAL_IF_NULL(p, "couldn't xrealloc %d bytes",
-		  ptr ? "realloc" : "malloc", size);
+	FATAL_IF_NULL(p, "couldn't xrealloc %d bytes", ptr ? "realloc" : "malloc", size);
 	return p;
 }
 
@@ -89,3 +85,4 @@ void *xmalloc(size_t size)
 	memset(p, 0, size);
 	return p;
 }
+

src/common/util.h

@@ -13,8 +13,7 @@
 void* xrealloc(void* ptr, size_t size);
 void* xmalloc(size_t size);
 
-typedef void (cleanup_handler) (void * /* context */ ,
-				int /* is fatal? */ );
+typedef void (cleanup_handler)(void* /* context */, int /* is fatal? */);
 
 /* set from 0 - 5 depending on what level of verbosity you want */
 extern int log_level;
@@ -163,3 +162,4 @@ uint64_t monotonic_time_ms(void);
 #define WARN_IF_NEGATIVE( value, msg, ... ) if ( value < 0 ) { warn( msg, ##__VA_ARGS__ ); }
 
 #endif
+

src/main.c

@@ -19,3 +19,4 @@ int main(int argc, char **argv)
 
 	return 0;
 }
+

src/proxy-main.c

@@ -19,7 +19,6 @@ static struct option proxy_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char proxy_short_options[] = "hl:p:C:P:b:" SOPT_QUIET SOPT_VERBOSE;
 static char proxy_help_text[] =
 	"Usage: flexnbd-proxy <options>\n\n"
@@ -27,24 +26,24 @@ static char proxy_help_text[] =
 	"We can listen on TCP or UNIX socket, but only connect to TCP servers.\n\n"
 	HELP_LINE
 	"\t--" OPT_ADDR ",-l <ADDR>\tThe address we will bind to as a proxy.\n"
-    "\t--" OPT_PORT
-    ",-p <PORT>\tThe port we will bind to as a proxy, if required.\n"
+	"\t--" OPT_PORT ",-p <PORT>\tThe port we will bind to as a proxy, if required.\n"
 	"\t--" OPT_CONNECT_ADDR ",-C <ADDR>\tAddress of the proxied server.\n"
 	"\t--" OPT_CONNECT_PORT ",-P <PORT>\tPort of the proxied server.\n"
-    "\t--" OPT_BIND
-    ",-b <ADDR>\tThe address we connect from, as a proxy.\n" "\t--"
-    OPT_CACHE
-    ",-c[=<CACHE-BYTES>]\tUse a RAM read cache of the given size.\n"
-    QUIET_LINE VERBOSE_LINE;
+	"\t--" OPT_BIND ",-b <ADDR>\tThe address we connect from, as a proxy.\n"
+	"\t--" OPT_CACHE ",-c[=<CACHE-BYTES>]\tUse a RAM read cache of the given size.\n"
+	QUIET_LINE
+	VERBOSE_LINE;
 
 static char proxy_default_cache_size[] = "4096";
 
-void read_proxy_param(int c,
+void read_proxy_param(
+			int c,
 			char **downstream_addr,
 			char **downstream_port,
 			char **upstream_addr,
 			char **upstream_port,
-		      char **bind_addr, char **cache_bytes)
+			char **bind_addr,
+			char **cache_bytes)
 {
 	switch( c ) {
 		case 'h' :
@@ -117,31 +116,34 @@ int main(int argc, char *argv[])
 	srand(time(NULL));
 
 	while (1) {
-	c = getopt_long(argc, argv, proxy_short_options, proxy_options,
-			NULL);
-	if (-1 == c) {
-	    break;
-	}
+		c = getopt_long( argc, argv, proxy_short_options, proxy_options, NULL );
+		if ( -1 == c ) { break; }
 		read_proxy_param( c,
 				&downstream_addr,
 				&downstream_port,
 				&upstream_addr,
-			 &upstream_port, &bind_addr, &cache_bytes);
+				&upstream_port,
+				&bind_addr,
+				&cache_bytes
+		);
 	}
 
 	if ( NULL == downstream_addr  ){
 		fprintf( stderr, "--addr is required.\n" );
 		exit_err( proxy_help_text );
 	} else if ( NULL == upstream_addr || NULL == upstream_port ){
-	fprintf(stderr,
-		"both --conn-addr and --conn-port are required.\n");
+		fprintf( stderr, "both --conn-addr and --conn-port are required.\n" );
 		exit_err( proxy_help_text );
 	}
 
-    proxy = proxy_create(downstream_addr,
+	proxy = proxy_create(
+		downstream_addr,
 		downstream_port,
 		upstream_addr,
-			 upstream_port, bind_addr, cache_bytes);
+		upstream_port,
+		bind_addr,
+		cache_bytes
+	);
 
 	/* Set these *after* proxy has been assigned to */
 	sigaction(SIGTERM, &exit_action, NULL);
@@ -150,12 +152,15 @@ int main(int argc, char *argv[])
 	signal(SIGPIPE, SIG_IGN); /* calls to splice() unhelpfully throw this */
 
 	if ( NULL != downstream_port ) {
-	info("Proxying between %s %s (downstream) and %s %s (upstream)",
-	     downstream_addr, downstream_port, upstream_addr,
-	     upstream_port);
+		info(
+			"Proxying between %s %s (downstream) and %s %s (upstream)",
+			downstream_addr, downstream_port, upstream_addr, upstream_port
+		);
 	} else {
-	info("Proxying between %s (downstream) and %s %s (upstream)",
-	     downstream_addr, upstream_addr, upstream_port);
+		info(
+			"Proxying between %s (downstream) and %s %s (upstream)",
+			downstream_addr, upstream_addr, upstream_port
+		);
 	}
 
 	success = do_proxy( proxy );
@@ -163,3 +168,4 @@ int main(int argc, char *argv[])
 
 	return success ? 0 : 1;
 }
+

src/proxy/prefetch.c

@@ -2,8 +2,7 @@
 #include "util.h"
 
 
-struct prefetch *prefetch_create(size_t size_bytes)
-{
+struct prefetch* prefetch_create( size_t size_bytes ){
 
 	struct prefetch* out = xmalloc( sizeof( struct prefetch ) );
 	NULLCHECK( out );
@@ -20,16 +19,14 @@ struct prefetch *prefetch_create(size_t size_bytes)
 
 }
 
-void prefetch_destroy(struct prefetch *prefetch)
-{
+void prefetch_destroy( struct prefetch *prefetch ) {
 	if( prefetch ) {
 		free( prefetch->buffer );
 		free( prefetch );
 	}
 }
 
-size_t prefetch_size(struct prefetch *prefetch)
-{
+size_t prefetch_size( struct prefetch *prefetch){
 	if ( prefetch ) {
 		return prefetch->size;
 	} else {
@@ -37,25 +34,21 @@ size_t prefetch_size(struct prefetch *prefetch)
 	}
 }
 
-void prefetch_set_is_empty(struct prefetch *prefetch)
-{
+void prefetch_set_is_empty( struct prefetch *prefetch ){
 	prefetch_set_full( prefetch, 0 );
 }
 
-void prefetch_set_is_full(struct prefetch *prefetch)
-{
+void prefetch_set_is_full( struct prefetch *prefetch ){
 	prefetch_set_full( prefetch, 1 );
 }
 
-void prefetch_set_full(struct prefetch *prefetch, int val)
-{
+void prefetch_set_full( struct prefetch *prefetch, int val ){
 	if( prefetch ) {
 		prefetch->is_full = val;
 	}
 }
 
-int prefetch_is_full(struct prefetch *prefetch)
-{
+int prefetch_is_full( struct prefetch *prefetch ){
 	if( prefetch ) {
 		return prefetch->is_full;
 	} else {
@@ -63,16 +56,13 @@ int prefetch_is_full(struct prefetch *prefetch)
 	}
 }
 
-int prefetch_contains(struct prefetch *prefetch, uint64_t from,
-		      uint32_t len)
-{
+int prefetch_contains( struct prefetch *prefetch, uint64_t from, uint32_t len ){
 	NULLCHECK( prefetch );
 	return from >= prefetch->from &&
 		from + len <= prefetch->from + prefetch->len;
 }
 
-char *prefetch_offset(struct prefetch *prefetch, uint64_t from)
-{
+char *prefetch_offset( struct prefetch *prefetch, uint64_t from ){
 	NULLCHECK( prefetch );
 	return prefetch->buffer + (from - prefetch->from);
 }

src/proxy/prefetch.h

@@ -27,8 +27,7 @@ void prefetch_set_is_empty(struct prefetch *prefetch);
 void prefetch_set_is_full( struct prefetch *prefetch );
 void prefetch_set_full( struct prefetch *prefetch, int val );
 int prefetch_is_full( struct prefetch *prefetch );
-int prefetch_contains(struct prefetch *prefetch, uint64_t from,
-		      uint32_t len);
+int prefetch_contains( struct prefetch *prefetch, uint64_t from, uint32_t len );
 char *prefetch_offset( struct prefetch *prefetch, uint64_t from );
 
 #endif

src/proxy/proxy.c

@@ -13,11 +13,13 @@
 #include <sys/socket.h>
 #include <netinet/tcp.h>
 
-struct proxier *proxy_create(char *s_downstream_address,
+struct proxier* proxy_create(
+	char* s_downstream_address,
 	char* s_downstream_port,
 	char* s_upstream_address,
 	char* s_upstream_port,
-			     char *s_upstream_bind, char *s_cache_bytes)
+	char* s_upstream_bind,
+	char* s_cache_bytes )
 {
 	struct proxier* out;
 	out = xmalloc( sizeof( struct proxier ) );
@@ -25,9 +27,10 @@ struct proxier *proxy_create(char *s_downstream_address,
 	FATAL_IF_NULL(s_downstream_address, "Listen address not specified");
 	NULLCHECK( s_downstream_address );
 
-    FATAL_UNLESS(parse_to_sockaddr
-		 (&out->listen_on.generic, s_downstream_address),
-		 "Couldn't parse downstream address %s");
+	FATAL_UNLESS(
+		parse_to_sockaddr( &out->listen_on.generic, s_downstream_address ),
+		"Couldn't parse downstream address %s"
+	);
 
 	if ( out->listen_on.family != AF_UNIX ) {
 		FATAL_IF_NULL( s_downstream_port, "Downstream port not specified" );
@@ -38,19 +41,22 @@ struct proxier *proxy_create(char *s_downstream_address,
 	FATAL_IF_NULL(s_upstream_address, "Upstream address not specified");
 	NULLCHECK( s_upstream_address );
 
-    FATAL_UNLESS(parse_ip_to_sockaddr
-		 (&out->connect_to.generic, s_upstream_address),
+	FATAL_UNLESS(
+		parse_ip_to_sockaddr( &out->connect_to.generic, s_upstream_address ),
 		"Couldn't parse upstream address '%s'",
-		 s_upstream_address);
+		s_upstream_address
+	);
 
 	FATAL_IF_NULL( s_upstream_port, "Upstream port not specified" );
 	NULLCHECK( s_upstream_port );
 	parse_port( s_upstream_port, &out->connect_to.v4 );
 
 	if ( s_upstream_bind ) {
-	FATAL_IF_ZERO(parse_ip_to_sockaddr
-		      (&out->connect_from.generic, s_upstream_bind),
-		      "Couldn't parse bind address '%s'", s_upstream_bind);
+		FATAL_IF_ZERO(
+			parse_ip_to_sockaddr( &out->connect_from.generic, s_upstream_bind ),
+			"Couldn't parse bind address '%s'",
+			s_upstream_bind
+		);
 		out->bind = 1;
 	}
 
@@ -70,28 +76,21 @@ struct proxier *proxy_create(char *s_downstream_address,
 	}
 
 	out->init.buf = xmalloc( sizeof( struct nbd_init_raw ) );
+	out->req.buf  = xmalloc( NBD_MAX_SIZE );
+	out->rsp.buf  = xmalloc( NBD_MAX_SIZE );
 
-    /* Add on the request / reply size to our malloc to accommodate both
-     * the struct and the data
-     */
-    out->req.buf = xmalloc(NBD_MAX_SIZE + NBD_REQUEST_SIZE);
-    out->rsp.buf = xmalloc(NBD_MAX_SIZE + NBD_REPLY_SIZE);
-
-    log_context =
-	xmalloc(strlen(s_upstream_address) + strlen(s_upstream_port) + 2);
+	log_context = xmalloc( strlen(s_upstream_address) + strlen(s_upstream_port) + 2 );
 	sprintf(log_context, "%s:%s", s_upstream_address, s_upstream_port);
 
 	return out;
 }
 
-int proxy_prefetches(struct proxier *proxy)
-{
+int proxy_prefetches( struct proxier* proxy ) {
 	NULLCHECK( proxy );
 	return proxy->prefetch != NULL;
 }
 
-int proxy_prefetch_bufsize(struct proxier *proxy)
-{
+int proxy_prefetch_bufsize( struct proxier* proxy ){
 	NULLCHECK( proxy );
 	return prefetch_size( proxy->prefetch );
 }
@@ -107,8 +106,7 @@ void proxy_destroy(struct proxier *proxy)
 }
 
 /* Shared between our two different connect_to_upstream paths */
-void proxy_finish_connect_to_upstream(struct proxier *proxy, uint64_t size,
-				      uint32_t flags);
+void proxy_finish_connect_to_upstream( struct proxier *proxy, uint64_t size );
 
 /* Try to establish a connection to our upstream server. Return 1 on success,
  * 0 on failure. this is a blocking call that returns a non-blocking socket.
@@ -122,22 +120,22 @@ int proxy_connect_to_upstream(struct proxier *proxy)
 
 	int fd = socket_connect( &proxy->connect_to.generic, connect_from );
 	uint64_t size = 0;
-    uint32_t flags = 0;
 
 	if ( -1 == fd ) {
 		return 0;
 	}
 
-    if (!socket_nbd_read_hello(fd, &size, &flags)) {
-	WARN_IF_NEGATIVE(sock_try_close(fd),
-			 "Couldn't close() after failed read of NBD hello on fd %i",
-			 fd);
+	if( !socket_nbd_read_hello( fd, &size ) ) {
+		WARN_IF_NEGATIVE(
+			sock_try_close( fd ),
+			"Couldn't close() after failed read of NBD hello on fd %i", fd
+		);
 		return 0;
 	}
 
 	proxy->upstream_fd = fd;
 	sock_set_nonblock( fd, 1 );
-    proxy_finish_connect_to_upstream(proxy, size, flags);
+	proxy_finish_connect_to_upstream( proxy, size );
 
 	return 1;
 }
@@ -158,8 +156,7 @@ void proxy_start_connect_to_upstream(struct proxier *proxy)
 	fd = socket( to->sa_family , SOCK_STREAM, 0 );
 
 	if( fd < 0 ) {
-	warn(SHOW_ERRNO
-	     ("Couldn't create socket to reconnect to upstream"));
+		warn( SHOW_ERRNO( "Couldn't create socket to reconnect to upstream" ) );
 		return;
 	}
 
@@ -194,28 +191,19 @@ void proxy_start_connect_to_upstream(struct proxier *proxy)
 	return;
 }
 
-void proxy_finish_connect_to_upstream(struct proxier *proxy, uint64_t size,
-				      uint32_t flags)
-{
+void proxy_finish_connect_to_upstream( struct proxier *proxy, uint64_t size ) {
 
 	if ( proxy->upstream_size == 0 ) {
 		info( "Size of upstream image is %"PRIu64" bytes", size );
 	} else if ( proxy->upstream_size != size ) {
-	warn("Size changed from %" PRIu64 " to %" PRIu64 " bytes",
-	     proxy->upstream_size, size);
+		warn(
+			"Size changed from %"PRIu64" to %"PRIu64" bytes",
+			proxy->upstream_size, size
+		);
 	}
 
 	proxy->upstream_size = size;
 
-    if (proxy->upstream_flags == 0) {
-	info("Upstream transmission flags set to %" PRIu32 "", flags);
-    } else if (proxy->upstream_flags != flags) {
-	warn("Upstream transmission flags changed from %" PRIu32 " to %"
-	     PRIu32 "", proxy->upstream_flags, flags);
-    }
-
-    proxy->upstream_flags = flags;
-
 	if ( AF_UNIX != proxy->connect_to.family ) {
 		if ( sock_set_tcp_nodelay( proxy->upstream_fd, 1 ) == -1 ) {
 			warn( SHOW_ERRNO( "Failed to set TCP_NODELAY" ) );
@@ -233,9 +221,11 @@ void proxy_disconnect_from_upstream(struct proxier *proxy)
 		info("Closing upstream connection on fd %i", proxy->upstream_fd );
 
 		/* TODO: An NBD disconnect would be pleasant here */
-	WARN_IF_NEGATIVE(sock_try_close(proxy->upstream_fd),
+		WARN_IF_NEGATIVE(
+			sock_try_close( proxy->upstream_fd ),
 			"Failed to close() fd %i when disconnecting from upstream",
-			 proxy->upstream_fd);
+			proxy->upstream_fd
+		);
 		proxy->upstream_fd = -1;
 	}
 }
@@ -247,28 +237,31 @@ void proxy_open_listen_socket(struct proxier *params)
 	NULLCHECK( params );
 
 	params->listen_fd = socket(params->listen_on.family, SOCK_STREAM, 0);
-    FATAL_IF_NEGATIVE(params->listen_fd,
-		      SHOW_ERRNO("Couldn't create listen socket")
+	FATAL_IF_NEGATIVE(
+		params->listen_fd, SHOW_ERRNO( "Couldn't create listen socket" )
 	);
 
 	/* Allow us to restart quickly */
-    FATAL_IF_NEGATIVE(sock_set_reuseaddr(params->listen_fd, 1),
+	FATAL_IF_NEGATIVE(
+		sock_set_reuseaddr(params->listen_fd, 1),
 		SHOW_ERRNO( "Couldn't set SO_REUSEADDR" )
 	);
 
 	if( AF_UNIX != params->listen_on.family ) {
-	FATAL_IF_NEGATIVE(sock_set_tcp_nodelay(params->listen_fd, 1),
+		FATAL_IF_NEGATIVE(
+			sock_set_tcp_nodelay(params->listen_fd, 1),
 			SHOW_ERRNO( "Couldn't set TCP_NODELAY" )
 		);
 	}
 
-    FATAL_UNLESS_ZERO(sock_try_bind
-		      (params->listen_fd, &params->listen_on.generic),
+	FATAL_UNLESS_ZERO(
+		sock_try_bind( params->listen_fd, &params->listen_on.generic ),
 		SHOW_ERRNO( "Failed to bind to listening socket" )
 	);
 
 	/* We're only serving one client at a time, hence backlog of 1 */
-    FATAL_IF_NEGATIVE(listen(params->listen_fd, 1),
+	FATAL_IF_NEGATIVE(
+		listen(params->listen_fd, 1),
 		SHOW_ERRNO( "Failed to listen on listening socket" )
 	);
 
@@ -299,8 +292,8 @@ static char *proxy_session_state_names[] = {
 
 static inline int proxy_state_upstream( int state )
 {
-    return state == CONNECT_TO_UPSTREAM || state == READ_INIT_FROM_UPSTREAM
-	|| state == WRITE_TO_UPSTREAM || state == READ_FROM_UPSTREAM;
+	return state == CONNECT_TO_UPSTREAM || state == READ_INIT_FROM_UPSTREAM ||
+	       state == WRITE_TO_UPSTREAM   || state == READ_FROM_UPSTREAM;
 }
 
 int proxy_prefetch_for_request( struct proxier* proxy, int state )
@@ -309,12 +302,10 @@ int proxy_prefetch_for_request(struct proxier *proxy, int state)
 	struct nbd_request* req = &proxy->req_hdr;
 	struct nbd_reply* rsp = &proxy->rsp_hdr;
 
-    struct nbd_request_raw *req_raw =
-	(struct nbd_request_raw *) proxy->req.buf;
-    struct nbd_reply_raw *rsp_raw =
-	(struct nbd_reply_raw *) proxy->rsp.buf;
+	struct nbd_request_raw* req_raw = (struct nbd_request_raw*) proxy->req.buf;
+	struct nbd_reply_raw *rsp_raw = (struct nbd_reply_raw*) proxy->rsp.buf;
 
-    int is_read = req->type == REQUEST_READ;
+	int is_read = ( req->type & REQUEST_MASK ) == REQUEST_READ;
 
 	if ( is_read ) {
 		/* See if we can respond with what's in our prefetch
@@ -333,8 +324,11 @@ int proxy_prefetch_for_request(struct proxier *proxy, int state)
 			nbd_h2r_reply( rsp, rsp_raw );
 
 			/* and the data */
-	    memcpy(proxy->rsp.buf + NBD_REPLY_SIZE,
-		   prefetch_offset(proxy->prefetch, req->from), req->len);
+			memcpy(
+				proxy->rsp.buf + NBD_REPLY_SIZE,
+				prefetch_offset( proxy->prefetch, req->from ),
+				req->len
+			);
 
 			proxy->rsp.size = NBD_REPLY_SIZE + req->len;
 			proxy->rsp.needle = 0;
@@ -342,14 +336,14 @@ int proxy_prefetch_for_request(struct proxier *proxy, int state)
 			/* return early, our work here is done */
 			return WRITE_TO_DOWNSTREAM;
 		}
-    } else {
+	}
+	else {
 		/* Safety catch.  If we're sending a write request, we
 		 * blow away the cache.  This is very pessimistic, but
 		 * it's simpler (and therefore safer) than working out
 		 * whether we can keep it or not.
 		 */
-	debug("Blowing away prefetch cache on type %d request.",
-	      req->type);
+		debug( "Blowing away prefetch cache on type %d request.", req->type );
 		prefetch_set_is_empty( proxy->prefetch );
 	}
 
@@ -397,12 +391,13 @@ int proxy_prefetch_for_reply(struct proxier *proxy, int state)
 	prefetched_bytes = proxy->req_hdr.len - proxy->prefetch_req_orig_len;
 
 	debug( "Prefetched additional %d bytes", prefetched_bytes );
-    memcpy(proxy->prefetch->buffer,
+	memcpy(
+		proxy->prefetch->buffer,
 		proxy->rsp.buf + proxy->prefetch_req_orig_len + NBD_REPLY_SIZE,
-	   prefetched_bytes);
+		prefetched_bytes
+	);
 
-    proxy->prefetch->from =
-	proxy->req_hdr.from + proxy->prefetch_req_orig_len;
+	proxy->prefetch->from = proxy->req_hdr.from + proxy->prefetch_req_orig_len;
 	proxy->prefetch->len = prefetched_bytes;
 
 	/* We've finished with proxy->req by now, so don't need to alter it to make
@@ -425,14 +420,12 @@ int proxy_read_from_downstream(struct proxier *proxy, int state)
 {
 	ssize_t count;
 
-    struct nbd_request_raw *request_raw =
-	(struct nbd_request_raw *) proxy->req.buf;
+	struct nbd_request_raw* request_raw = (struct nbd_request_raw*) proxy->req.buf;
 	struct nbd_request*     request = &(proxy->req_hdr);
 
 //	assert( state == READ_FROM_DOWNSTREAM );
 
-    count =
-	iobuf_read(proxy->downstream_fd, &proxy->req, NBD_REQUEST_SIZE);
+	count = iobuf_read( proxy->downstream_fd, &proxy->req, NBD_REQUEST_SIZE );
 
 	if ( count == -1 ) {
 		warn( SHOW_ERRNO( "Couldn't read request from downstream" ) );
@@ -442,26 +435,21 @@ int proxy_read_from_downstream(struct proxier *proxy, int state)
 	if ( proxy->req.needle == NBD_REQUEST_SIZE ) {
 		nbd_r2h_request( request_raw, request );
 
-	if (request->type == REQUEST_DISCONNECT) {
+		if ( ( request->type & REQUEST_MASK ) == REQUEST_DISCONNECT ) {
 			info( "Received disconnect request from client" );
 			return EXIT;
 		}
 
-	/* Simple validations -- the request / reply size have already
-	 * been taken into account in the xmalloc, so no need to worry
-	 * about them here
-	 */
-	if (request->type == REQUEST_READ) {
-	    if (request->len > NBD_MAX_SIZE) {
-		warn("NBD read request size %" PRIu32 " too large",
-		     request->len);
+		/* Simple validations */
+		if ( ( request->type & REQUEST_MASK ) == REQUEST_READ ) {
+			if (request->len > ( NBD_MAX_SIZE - NBD_REPLY_SIZE ) ) {
+				warn( "NBD read request size %"PRIu32" too large", request->len );
 				return EXIT;
 			}
 		}
-	if (request->type == REQUEST_WRITE) {
-	    if (request->len > NBD_MAX_SIZE) {
-		warn("NBD write request size %" PRIu32 " too large",
-		     request->len);
+		if ( (request->type & REQUEST_MASK ) == REQUEST_WRITE ) {
+			if (request->len > ( NBD_MAX_SIZE - NBD_REQUEST_SIZE ) ) {
+				warn( "NBD write request size %"PRIu32" too large", request->len );
 				return EXIT;
 			}
 
@@ -470,9 +458,10 @@ int proxy_read_from_downstream(struct proxier *proxy, int state)
 	}
 
 	if ( proxy->req.needle == proxy->req.size ) {
-	debug("Received NBD request from downstream. type=%" PRIu16
-	      " flags=%" PRIu16 " from=%" PRIu64 " len=%" PRIu32,
-	      request->type, request->flags, request->from, request->len);
+		debug(
+			"Received NBD request from downstream. type=%"PRIu32" from=%"PRIu64" len=%"PRIu32,
+			request->type, request->from, request->len
+		);
 
 		/* Finished reading, so advance state. Leave size untouched so the next
 		 * state knows how many bytes to write */
@@ -490,8 +479,9 @@ int proxy_continue_connecting_to_upstream(struct proxier *proxy, int state)
 
 //	assert( state == CONNECT_TO_UPSTREAM );
 
-    result =
-	getsockopt(proxy->upstream_fd, SOL_SOCKET, SO_ERROR, &error, &len);
+	result = getsockopt(
+		proxy->upstream_fd, SOL_SOCKET, SO_ERROR,  &error, &len
+	);
 
 	if ( result == -1 ) {
 		warn( SHOW_ERRNO( "Failed to tell if connected to upstream" ) );
@@ -517,9 +507,7 @@ int proxy_read_init_from_upstream(struct proxier *proxy, int state)
 
 //	assert( state == READ_INIT_FROM_UPSTREAM );
 
-    count =
-	iobuf_read(proxy->upstream_fd, &proxy->init,
-		   sizeof(struct nbd_init_raw));
+	count = iobuf_read( proxy->upstream_fd, &proxy->init, sizeof( struct nbd_init_raw ) );
 
 	if ( count == -1 ) {
 		warn( SHOW_ERRNO( "Failed to read init from upstream" ) );
@@ -528,18 +516,11 @@ int proxy_read_init_from_upstream(struct proxier *proxy, int state)
 
 	if ( proxy->init.needle == proxy->init.size ) {
 		uint64_t upstream_size;
-	uint32_t upstream_flags;
-	if (!nbd_check_hello
-	    ((struct nbd_init_raw *) proxy->init.buf, &upstream_size,
-	     &upstream_flags)) {
+		if ( !nbd_check_hello( (struct nbd_init_raw*) proxy->init.buf, &upstream_size ) ) {
 			warn( "Upstream sent invalid init" );
 			goto disconnect;
 		}
 
-	/* record the flags, and log the reconnection, set TCP_NODELAY */
-	proxy_finish_connect_to_upstream(proxy, upstream_size,
-					 upstream_flags);
-
 		/* Currently, we only get disconnected from upstream (so needing to come
 		 * here) when we have an outstanding request. If that becomes false,
 		 * we'll need to choose the right state to return to here */
@@ -603,8 +584,7 @@ int proxy_read_from_upstream(struct proxier *proxy, int state)
 	ssize_t count;
 
 	struct nbd_reply*     reply     = &(proxy->rsp_hdr);
-    struct nbd_reply_raw *reply_raw =
-	(struct nbd_reply_raw *) proxy->rsp.buf;
+	struct nbd_reply_raw* reply_raw = (struct nbd_reply_raw*) proxy->rsp.buf;
 
 	/* We can't assume the NBD_REPLY_SIZE + req->len is what we'll get back */
 	count = iobuf_read( proxy->upstream_fd, &proxy->rsp, NBD_REPLY_SIZE );
@@ -622,7 +602,12 @@ int proxy_read_from_upstream(struct proxier *proxy, int state)
 			goto disconnect;
 		}
 
-	if (proxy->req_hdr.type == REQUEST_READ) {
+		if ( reply->error != 0 ) {
+			warn( "NBD error returned from upstream: %"PRIu32, reply->error );
+			goto disconnect;
+		}
+
+		if ( ( proxy->req_hdr.type & REQUEST_MASK ) == REQUEST_READ ) {
 			/* Get the read reply data too. */
 			proxy->rsp.size += proxy->req_hdr.len;
 		}
@@ -698,8 +683,7 @@ void proxy_session(struct proxier *proxy)
 
 
 	/* First action: Write hello to downstream */
-    nbd_hello_to_buf((struct nbd_init_raw *) proxy->rsp.buf,
-		     proxy->upstream_size, proxy->upstream_flags);
+	nbd_hello_to_buf( (struct nbd_init_raw *) proxy->rsp.buf, proxy->upstream_size );
 	proxy->rsp.size = sizeof( struct nbd_init_raw );
 	proxy->rsp.needle = 0;
 	state = WRITE_TO_DOWNSTREAM;
@@ -727,13 +711,13 @@ void proxy_session(struct proxier *proxy)
 		if ( state != old_state ) {
 			state_started = monotonic_time_ms();
 
-	    debug("State transition from %s to %s",
+			debug(
+				"State transition from %s to %s",
 				proxy_session_state_names[old_state],
 				proxy_session_state_names[state]
 			);
 		} else {
-	    debug("Proxy is in state %s", proxy_session_state_names[state],
-		  state);
+			debug( "Proxy is in state %s", proxy_session_state_names[state], state );
 		}
 
 		old_state = state;
@@ -778,9 +762,7 @@ void proxy_session(struct proxier *proxy)
 			select_timeout_ptr = &select_timeout;
 		}
 
-	result =
-	    sock_try_select(FD_SETSIZE, &rfds, &wfds, NULL,
-			    select_timeout_ptr);
+		result = sock_try_select( FD_SETSIZE, &rfds, &wfds, NULL, select_timeout_ptr );
 
 		if ( result == -1 ) {
 			warn( SHOW_ERRNO( "select() failed: " ) );
@@ -806,8 +788,7 @@ void proxy_session(struct proxier *proxy)
 				break;
 			case CONNECT_TO_UPSTREAM:
 				if ( FD_ISSET( proxy->upstream_fd, &wfds ) ) {
-		state =
-		    proxy_continue_connecting_to_upstream(proxy, state);
+					state = proxy_continue_connecting_to_upstream( proxy, state );
 				}
 				/* Leaving state untouched will retry connecting to upstream -
 				 * so introduce a bit of sleep  */
@@ -849,7 +830,9 @@ void proxy_session(struct proxier *proxy)
 		 */
 		if ( old_state == state && proxy_state_upstream( state ) ) {
 			if ( ( monotonic_time_ms() ) - state_started > UPSTREAM_TIMEOUT ) {
-		warn("Timed out in state %s while communicating with upstream", proxy_session_state_names[state]
+				warn(
+					"Timed out in state %s while communicating with upstream",
+					proxy_session_state_names[state]
 				);
 				state = CONNECT_TO_UPSTREAM;
 
@@ -863,8 +846,10 @@ void proxy_session(struct proxier *proxy)
 		}
 	}
 
-    info("Finished proxy session on fd %i after %" PRIu64
-	 " successful request(s)", proxy->downstream_fd, proxy->req_count);
+	info(
+		"Finished proxy session on fd %i after %"PRIu64" successful request(s)",
+		proxy->downstream_fd, proxy->req_count
+	);
 
 	/* Reset these two for the next session */
 	proxy->req_count = 0;
@@ -889,13 +874,13 @@ int proxy_accept(struct proxier *params)
 	FD_ZERO(&fds);
 	FD_SET(params->listen_fd, &fds);
 
-    FATAL_IF_NEGATIVE(sock_try_select(FD_SETSIZE, &fds, NULL, NULL, NULL),
+	FATAL_IF_NEGATIVE(
+		sock_try_select(FD_SETSIZE, &fds, NULL, NULL, NULL),
 		SHOW_ERRNO( "select() failed" )
 	);
 
 	if ( FD_ISSET( params->listen_fd, &fds ) ) {
-	client_fd =
-	    accept(params->listen_fd, &client_address.generic, &socklen);
+		client_fd = accept( params->listen_fd, &client_address.generic, &socklen );
 
 		if ( client_address.family != AF_UNIX ) {
 			if ( sock_set_tcp_nodelay(client_fd, 1) == -1 ) {
@@ -908,9 +893,11 @@ int proxy_accept(struct proxier *params)
 		params->downstream_fd = client_fd;
 		proxy_session( params );
 
-	WARN_IF_NEGATIVE(sock_try_close(params->downstream_fd),
+		WARN_IF_NEGATIVE(
+			sock_try_close( params->downstream_fd ),
 			"Couldn't close() downstram fd %i after proxy session",
-			 params->downstream_fd);
+			params->downstream_fd
+		);
 		params->downstream_fd = -1;
 	}
 
@@ -935,31 +922,33 @@ void proxy_cleanup(struct proxier *proxy)
 
 		if ( AF_UNIX == proxy->listen_on.family ) {
 			if ( -1 == unlink( proxy->listen_on.un.sun_path ) ) {
-		warn(SHOW_ERRNO
-		     ("Failed to unlink %s",
-		      proxy->listen_on.un.sun_path));
+				warn( SHOW_ERRNO( "Failed to unlink %s", proxy->listen_on.un.sun_path ) );
 			}
 		}
 
-	WARN_IF_NEGATIVE(sock_try_close(proxy->listen_fd),
-			 SHOW_ERRNO("Failed to close() listen fd %i",
-				    proxy->listen_fd)
+		WARN_IF_NEGATIVE(
+			sock_try_close( proxy->listen_fd ),
+			SHOW_ERRNO( "Failed to close() listen fd %i", proxy->listen_fd )
 		);
 		proxy->listen_fd = -1;
 	}
 
 	if ( -1 != proxy->downstream_fd ) {
-	WARN_IF_NEGATIVE(sock_try_close(proxy->downstream_fd),
-			 SHOW_ERRNO("Failed to close() downstream fd %i",
-				    proxy->downstream_fd)
+		WARN_IF_NEGATIVE(
+			sock_try_close( proxy->downstream_fd ),
+			SHOW_ERRNO(
+				"Failed to close() downstream fd %i", proxy->downstream_fd
+			)
 		);
 		proxy->downstream_fd = -1;
 	}
 
 	if ( -1 != proxy->upstream_fd ) {
-	WARN_IF_NEGATIVE(sock_try_close(proxy->upstream_fd),
-			 SHOW_ERRNO("Failed to close() upstream fd %i",
-				    proxy->upstream_fd)
+		WARN_IF_NEGATIVE(
+			sock_try_close( proxy->upstream_fd ),
+			SHOW_ERRNO(
+				"Failed to close() upstream fd %i", proxy->upstream_fd
+			)
 		);
 		proxy->upstream_fd = -1;
 	}
@@ -986,3 +975,4 @@ int do_proxy(struct proxier *params)
 
 	return 0;
 }
+

src/proxy/proxy.h

@@ -46,9 +46,6 @@ struct proxier {
 	/* This is the size we advertise to the downstream server */
 	uint64_t          upstream_size;
 
-    /* These are the transmission flags sent as part of the handshake */
-    uint32_t upstream_flags;
-
 	/* We transform the raw request header into here */
 	struct nbd_request req_hdr;
 
@@ -85,13 +82,16 @@ struct proxier {
 	/** */
 };
 
-struct proxier *proxy_create(char *s_downstream_address,
+struct proxier* proxy_create(
+	char* s_downstream_address,
 	char* s_downstream_port,
 	char* s_upstream_address,
 	char* s_upstream_port,
-			     char *s_upstream_bind, char *s_cache_bytes);
+	char* s_upstream_bind,
+	char* s_cache_bytes);
 int do_proxy( struct proxier* proxy );
 void proxy_cleanup( struct proxier* proxy );
 void proxy_destroy( struct proxier* proxy );
 
 #endif
+

src/server/acl.c

@@ -22,9 +22,7 @@ static int testmasks[9] = { 0, 128, 192, 224, 240, 248, 252, 254, 255 };
 /** Test whether AF_INET or AF_INET6 sockaddr is included in the given access
   * control list, returning 1 if it is, and 0 if not.
   */
-static int is_included_in_acl(int list_length,
-			      struct ip_and_mask (*list)[],
-			      union mysockaddr *test)
+static int is_included_in_acl(int list_length, struct ip_and_mask (*list)[], union mysockaddr* test)
 {
 	NULLCHECK( test );
 
@@ -35,8 +33,7 @@ static int is_included_in_acl(int list_length,
 		int testbits;
 		unsigned char *raw_address1 = NULL, *raw_address2 = NULL;
 
-	debug("checking acl entry %d (%d/%d)", i, test->generic.sa_family,
-	      entry->ip.family);
+		debug("checking acl entry %d (%d/%d)", i, test->generic.sa_family, entry->ip.family);
 
 		if (test->generic.sa_family != entry->ip.family) {
 			continue;
@@ -46,24 +43,24 @@ static int is_included_in_acl(int list_length,
 			debug("it's an AF_INET");
 			raw_address1 = (unsigned char*) &test->v4.sin_addr;
 			raw_address2 = (unsigned char*) &entry->ip.v4.sin_addr;
-	} else if (test->generic.sa_family == AF_INET6) {
+		}
+		else if (test->generic.sa_family == AF_INET6) {
 			debug("it's an AF_INET6");
 			raw_address1 = (unsigned char*) &test->v6.sin6_addr;
 			raw_address2 = (unsigned char*) &entry->ip.v6.sin6_addr;
-	} else {
+		}
+		else {
 			fatal( "Can't check an ACL for this address type." );
 		}
 
 		debug("testbits=%d", entry->mask);
 
 		for (testbits = entry->mask; testbits > 0; testbits -= 8) {
-	    debug("testbits=%d, c1=%02x, c2=%02x", testbits,
-		  raw_address1[0], raw_address2[0]);
+			debug("testbits=%d, c1=%02x, c2=%02x", testbits, raw_address1[0], raw_address2[0]);
 			if (testbits >= 8) {
-		if (raw_address1[0] != raw_address2[0]) {
-		    goto no_match;
+				if (raw_address1[0] != raw_address2[0]) { goto no_match; }
 			}
-	    } else {
+			else {
 				if ((raw_address1[0] & testmasks[testbits%8]) !=
 				    (raw_address2[0] & testmasks[testbits%8]) ) {
 				    	goto no_match;
@@ -89,7 +86,8 @@ int acl_includes(struct acl *acl, union mysockaddr *addr)
 
 	if ( 0 == acl->len ) {
 		return !( acl->default_deny );
-    } else {
+	}
+	else {
 		return is_included_in_acl( acl->len, acl->entries, addr );
 	}
 }
@@ -107,3 +105,4 @@ void acl_destroy(struct acl *acl)
 	acl->entries = NULL;
 	free( acl );
 }
+

src/server/bitset.h

@@ -30,41 +30,30 @@ typedef bitfield_word_t *bitfield_p;
 			((_bytes + (BITFIELD_WORD_SIZE-1)) / BITFIELD_WORD_SIZE)
 
 /** Return the bit value ''idx'' in array ''b'' */
-static inline int bit_get(bitfield_p b, uint64_t idx)
-{
+static inline int bit_get(bitfield_p b, uint64_t idx) {
 	return (BIT_WORD(b, idx) >> (idx & (BITS_PER_WORD-1))) & 1;
 }
 
 /** Return 1 if the bit at ''idx'' in array ''b'' is set */
-static inline int bit_is_set(bitfield_p b, uint64_t idx)
-{
+static inline int bit_is_set(bitfield_p b, uint64_t idx) {
 	return bit_get(b, idx);
 }
-
 /** Return 1 if the bit at ''idx'' in array ''b'' is clear */
-static inline int bit_is_clear(bitfield_p b, uint64_t idx)
-{
+static inline int bit_is_clear(bitfield_p b, uint64_t idx) {
 	return !bit_get(b, idx);
 }
-
 /** Tests whether the bit at ''idx'' in array ''b'' has value ''value'' */
-static inline int bit_has_value(bitfield_p b, uint64_t idx, int value)
-{
+static inline int bit_has_value(bitfield_p b, uint64_t idx, int value) {
 	return bit_get(b, idx) == !!value;
 }
-
 /** Sets the bit ''idx'' in array ''b'' */
-static inline void bit_set(bitfield_p b, uint64_t idx)
-{
+static inline void bit_set(bitfield_p b, uint64_t idx) {
 	BIT_WORD(b, idx) |= BIT_MASK(idx);
 }
-
 /** Clears the bit ''idx'' in array ''b'' */
-static inline void bit_clear(bitfield_p b, uint64_t idx)
-{
+static inline void bit_clear(bitfield_p b, uint64_t idx) {
 	BIT_WORD(b, idx) &= ~BIT_MASK(idx);
 }
-
 /** Sets ''len'' bits in array ''b'' starting at offset ''from'' */
 static inline void bit_set_range(bitfield_p b, uint64_t from, uint64_t len)
 {
@@ -83,10 +72,8 @@ static inline void bit_set_range(bitfield_p b, uint64_t from, uint64_t len)
 		bit_set( b, from++ );
 	}
 }
-
 /** Clears ''len'' bits in array ''b'' starting at offset ''from'' */
-static inline void bit_clear_range(bitfield_p b, uint64_t from,
-				   uint64_t len)
+static inline void bit_clear_range(bitfield_p b, uint64_t from, uint64_t len)
 {
 	for ( ; (from % BITS_PER_WORD) != 0 && len > 0 ; len-- ) {
 		bit_clear( b, from++ );
@@ -109,9 +96,7 @@ static inline void bit_clear_range(bitfield_p b, uint64_t from,
   * bits that are the same as the first one specified. If ''run_is_set'' is
   * non-NULL, the value of that bit is placed into it.
   */
-static inline uint64_t bit_run_count(bitfield_p b, uint64_t from,
-				     uint64_t len, int *run_is_set)
-{
+static inline uint64_t bit_run_count(bitfield_p b, uint64_t from, uint64_t len, int *run_is_set) {
 	uint64_t count = 0;
 	int first_value = bit_get(b, from);
 	bitfield_word_t word_match = first_value ? -1 : 0;
@@ -200,10 +185,8 @@ static inline struct bitset *bitset_alloc(uint64_t size, int resolution)
 	// calculate a size to allocate that is a multiple of the size of the
 	// bitfield word
 	size_t bitfield_size =
-	BIT_WORDS_FOR_SIZE(((size + resolution -
-			     1) / resolution)) * sizeof(bitfield_word_t);
-    struct bitset *bitset =
-	xmalloc(sizeof(struct bitset) + (bitfield_size / 8));
+			BIT_WORDS_FOR_SIZE((( size + resolution - 1 ) / resolution)) * sizeof( bitfield_word_t );
+	struct bitset *bitset = xmalloc(sizeof( struct bitset ) + ( bitfield_size / 8 ) );
 
 	bitset->size = size;
 	bitset->resolution = resolution;
@@ -241,9 +224,12 @@ static inline void bitset_free(struct bitset *set)
   FATAL_IF_NEGATIVE(pthread_mutex_unlock(&set->lock), "Error unlocking bitset")
 
 
-static inline void bitset_stream_enqueue(struct bitset *set,
+static inline void bitset_stream_enqueue(
+	struct bitset * set,
 	enum bitset_stream_events event,
-					 uint64_t from, uint64_t len)
+	uint64_t from,
+	uint64_t len
+)
 {
 	struct bitset_stream * stream = set->stream;
 
@@ -268,8 +254,10 @@ static inline void bitset_stream_enqueue(struct bitset *set,
 	return;
 }
 
-static inline void bitset_stream_dequeue(struct bitset *set,
-					 struct bitset_stream_entry *out)
+static inline void bitset_stream_dequeue(
+	struct bitset * set,
+	struct bitset_stream_entry * out
+)
 {
 	struct bitset_stream * stream = set->stream;
 	struct bitset_stream_entry * dequeued;
@@ -310,9 +298,10 @@ static inline size_t bitset_stream_size(struct bitset *set)
 	return size;
 }
 
-static inline uint64_t bitset_stream_queued_bytes(struct bitset *set,
-						  enum bitset_stream_events
-						  event)
+static inline uint64_t bitset_stream_queued_bytes(
+	struct bitset * set,
+	enum bitset_stream_events event
+)
 {
 	uint64_t total;
 
@@ -342,8 +331,10 @@ static inline void bitset_disable_stream(struct bitset *set)
 /** Set the bits in a bitset which correspond to the given bytes in the larger
   * file.
   */
-static inline void bitset_set_range(struct bitset *set,
-				    uint64_t from, uint64_t len)
+static inline void bitset_set_range(
+	struct bitset * set,
+	uint64_t from,
+	uint64_t len)
 {
 	INT_FIRST_AND_LAST;
 	BITSET_LOCK;
@@ -366,8 +357,10 @@ static inline void bitset_set(struct bitset *set)
 /** Clear the bits in a bitset which correspond to the given bytes in the
   * larger file.
   */
-static inline void bitset_clear_range(struct bitset *set,
-				      uint64_t from, uint64_t len)
+static inline void bitset_clear_range(
+	struct bitset * set,
+	uint64_t from,
+	uint64_t len)
 {
 	INT_FIRST_AND_LAST;
 	BITSET_LOCK;
@@ -390,9 +383,12 @@ static inline void bitset_clear(struct bitset *set)
 /** As per bitset_run_count but also tells you whether the run it found was set
   * or unset, atomically.
   */
-static inline uint64_t bitset_run_count_ex(struct bitset *set,
+static inline uint64_t bitset_run_count_ex(
+	struct bitset * set,
 	uint64_t from,
-					   uint64_t len, int *run_is_set)
+	uint64_t len,
+	int* run_is_set
+)
 {
 	uint64_t run;
 
@@ -405,9 +401,7 @@ static inline uint64_t bitset_run_count_ex(struct bitset *set,
 	INT_FIRST_AND_LAST;
 
 	BITSET_LOCK;
-    run =
-	bit_run_count(set->bits, first, bitlen,
-		      run_is_set) * set->resolution;
+	run = bit_run_count(set->bits, first, bitlen, run_is_set) * set->resolution;
 	run -= (from % set->resolution);
 	BITSET_UNLOCK;
 
@@ -417,8 +411,10 @@ static inline uint64_t bitset_run_count_ex(struct bitset *set,
 /** Counts the number of contiguous bytes that are represented as a run in
   * the bit field.
   */
-static inline uint64_t bitset_run_count(struct bitset *set,
-					uint64_t from, uint64_t len)
+static inline uint64_t bitset_run_count(
+	struct bitset * set,
+	uint64_t from,
+	uint64_t len)
 {
 	return bitset_run_count_ex( set, from, len, NULL );
 }
@@ -439,3 +435,4 @@ static inline int bitset_is_set_at(struct bitset *set, uint64_t at)
 
 
 #endif
+

src/server/client.c

@@ -18,16 +18,14 @@
 
 // When this signal is invoked, we call shutdown() on the client fd, which
 // results in the thread being wound up
-void client_killswitch_hit(int signal
-			   __attribute__ ((unused)), siginfo_t * info,
-			   void *ptr __attribute__ ((unused)))
+void client_killswitch_hit(int signal __attribute__ ((unused)), siginfo_t *info, void *ptr __attribute__ ((unused)))
 {
 	int fd = info->si_value.sival_int;
 	warn( "Killswitch for fd %i activated, calling shutdown on socket", fd );
 
-    FATAL_IF(-1 == shutdown(fd, SHUT_RDWR),
-	     SHOW_ERRNO
-	     ("Failed to shutdown() the socket, killing the server")
+	FATAL_IF(
+		-1 == shutdown( fd, SHUT_RDWR ),
+		SHOW_ERRNO( "Failed to shutdown() the socket, killing the server" )
 	 );
 }
 
@@ -55,8 +53,8 @@ struct client *client_create(struct server *serve, int socket)
 
 	c->stop_signal = self_pipe_create();
 
-    FATAL_IF_NEGATIVE(timer_create
-		      (CLOCK_MONOTONIC, &evp, &(c->killswitch)),
+	FATAL_IF_NEGATIVE(
+		timer_create( CLOCK_MONOTONIC, &evp, &(c->killswitch) ),
 		SHOW_ERRNO( "Failed to create killswitch timer" )
 	);
 
@@ -69,8 +67,7 @@ void client_signal_stop(struct client *c)
 {
 	NULLCHECK( c);
 
-    debug("client %p: signal stop (%d, %d)", c, c->stop_signal->read_fd,
-	  c->stop_signal->write_fd);
+	debug("client %p: signal stop (%d, %d)", c,c->stop_signal->read_fd, c->stop_signal->write_fd );
 	self_pipe_signal( c->stop_signal );
 }
 
@@ -78,7 +75,8 @@ void client_destroy(struct client *client)
 {
 	NULLCHECK( client );
 
-    FATAL_IF_NEGATIVE(timer_delete(client->killswitch),
+	FATAL_IF_NEGATIVE(
+		timer_delete( client->killswitch ),
 		SHOW_ERRNO( "Couldn't delete killswitch" )
 	);
 
@@ -120,9 +118,9 @@ void write_not_zeroes(struct client *client, uint64_t from, uint64_t len)
 		 */
 
 		uint64_t run = bitset_run_count(map, from, len);
+		struct iommap *iommap = iommap_alloc(client->fileno, from, len); 
 
-	debug("write_not_zeroes: from=%ld, len=%d, run=%d", from, len,
-	      run);
+		debug("write_not_zeroes: from=%ld, len=%d, run=%d", from, len, run);
 
 		if (run > len) {
 			run = len;
@@ -158,7 +156,7 @@ void write_not_zeroes(struct client *client, uint64_t from, uint64_t len)
 		if (bitset_is_set_at(map, from)) {
 			debug("writing the lot: from=%ld, run=%d", from, run);
 			/* already allocated, just write it all */
-	    DO_READ(client->mapped + from, run);
+			DO_READ(iommap->buf, run);
 			/* We know from our earlier call to  bitset_run_count that the
 			 * bitset is all-1s at this point, but we need to dirty it for the
 			 * sake of the event stream - the actual bytes have changed, and we
@@ -167,7 +165,8 @@ void write_not_zeroes(struct client *client, uint64_t from, uint64_t len)
 			bitset_set_range( map, from, run );
 			len  -= run;
 			from += run;
-	} else {
+		}
+		else {
 			char zerobuffer[block_allocation_resolution];
 			/* not allocated, read in block_allocation_resoution */
 			while (run > 0) {
@@ -185,11 +184,10 @@ void write_not_zeroes(struct client *client, uint64_t from, uint64_t len)
 				 */
 
 				int all_zeros = (zerobuffer[0] == 0) &&
-		    (0 ==
-		     memcmp(zerobuffer, zerobuffer + 1, blockrun - 1));
+					(0 == memcmp( zerobuffer, zerobuffer+1, blockrun-1 ));
 
 				if ( !all_zeros ) {
-		    memcpy(client->mapped + from, zerobuffer, blockrun);
+					memcpy(iommap->buf, zerobuffer, blockrun);
 					bitset_set_range(map, from, blockrun);
 					/* at this point we could choose to
 					 * short-cut the rest of the write for
@@ -208,6 +206,8 @@ void write_not_zeroes(struct client *client, uint64_t from, uint64_t len)
 				from += blockrun;
 			}
 		}
+		iommap_sync(iommap);
+		iommap_free(iommap);
 	}
 }
 
@@ -220,8 +220,7 @@ int fd_read_request(int fd, struct nbd_request_raw *out_request)
 
 /* Returns 1 if *request was filled with a valid request which we should
  * try to honour. 0 otherwise. */
-int client_read_request(struct client *client,
-			struct nbd_request *out_request, int *disconnected)
+int client_read_request( struct client * client , struct nbd_request *out_request, int * disconnected )
 {
 	NULLCHECK( client );
 	NULLCHECK( out_request );
@@ -232,13 +231,15 @@ int client_read_request(struct client *client,
 		*disconnected = 1;
 		switch( errno ){
 			case 0:
-	    warn("EOF while reading request");
+				debug( "EOF while reading request" );
 				return 0;
 			case ECONNRESET:
-	    warn("Connection reset while" " reading request");
+				debug( "Connection reset while"
+						" reading request" );
 				return 0;
 			case ETIMEDOUT:
-	    warn("Connection timed out while" " reading request");
+				debug( "Connection timed out while"
+						" reading request" );
 				return 0;
 			default:
 				/* FIXME: I've seen this happen, but I
@@ -248,7 +249,9 @@ int client_read_request(struct client *client,
 				 * again.  It should *probably* be an
 				 * error() call, but I want to be sure.
 				 * */
-	    fatal("Error reading request: %d, %s", errno, strerror(errno));
+				fatal("Error reading request: %d, %s",
+						errno,
+						strerror( errno ));
 		}
 	}
 
@@ -293,8 +296,7 @@ int fd_write_reply(int fd, uint64_t handle, int error)
  * Returns 1; we don't check for errors on the write.
  * TODO: Check for errors on the write.
  */
-int client_write_reply(struct client *client, struct nbd_request *request,
-		       int error)
+int client_write_reply( struct client * client, struct nbd_request *request, int error )
 {
 	return fd_write_reply( client->socket, request->handle.w, error);
 }
@@ -308,17 +310,14 @@ void client_write_init(struct client *client, uint64_t size)
 	memcpy( init.passwd, INIT_PASSWD, sizeof( init.passwd ) );
 	init.magic = INIT_MAGIC;
 	init.size = size;
-    /* As more features are implemented, this is the place to advertise
-     * them.
-     */
-    init.flags = FLAG_HAS_FLAGS | FLAG_SEND_FLUSH | FLAG_SEND_FUA;
-    memset(init.reserved, 0, 124);
+	memset( init.reserved, 0, 128 );
 
 	nbd_h2r_init( &init, &init_raw );
 
-    ERROR_IF_NEGATIVE(writeloop
-		      (client->socket, &init_raw, sizeof(init_raw)),
-		      "Couldn't send hello");
+	ERROR_IF_NEGATIVE(
+		writeloop(client->socket, &init_raw, sizeof(init_raw)),
+		"Couldn't send hello"
+	);
 }
 
 
@@ -338,15 +337,23 @@ void client_flush(struct client *client, size_t len)
 	size_t spliced = 0;
 
 	while ( spliced < len ) {
-	ssize_t received = splice(client->socket, NULL,
+		ssize_t received = splice(
+				client->socket, NULL,
 				pipes[1], NULL,
 				len-spliced, flags );
-	FATAL_IF_NEGATIVE(received, "splice error: %s", strerror(errno));
+		FATAL_IF_NEGATIVE( received,
+				"splice error: %s",
+				strerror(errno));
 		ssize_t junked = 0;
 		while( junked < received ) {
 			ssize_t junk;
-	    junk = splice(pipes[0], NULL, devnull, NULL, received, flags);
-	    FATAL_IF_NEGATIVE(junk, "splice error: %s", strerror(errno));
+			junk = splice(
+				pipes[0], NULL,
+				devnull, NULL,
+				received, flags );
+			FATAL_IF_NEGATIVE( junk,
+				"splice error: %s",
+				strerror(errno));
 			junked += junk;
 		}
 		spliced += received;
@@ -378,26 +385,27 @@ int client_request_needs_reply(struct client *client,
 		return 0;
 	}
 
-    debug("request type=%" PRIu16 ", flags=%" PRIu16 ", from=%" PRIu64
-	  ", len=%" PRIu32 ", handle=0x%08X", request.type, request.flags,
-	  request.from, request.len, request.handle);
+	debug(
+		"request type=%"PRIu32", from=%"PRIu64", len=%"PRIu32", handle=0x%08X",
+		request.type, request.from, request.len, request.handle
+	);
 
-    /* check it's not out of range. NBD protocol requires ENOSPC to be
-     * returned in this instance 
-     */
+	/* check it's not out of range */
 	if ( request.from+request.len > client->serve->size) {
 		warn("write request %"PRIu64"+%"PRIu32" out of range",
-	     request.from, request.len);
+		  request.from, request.len
+		);
 		if ( request.type == REQUEST_WRITE ) {
 			client_flush( client, request.len );
 		}
-	client_write_reply(client, &request, ENOSPC);
+		client_write_reply( client, &request, EPERM ); /* TODO: Change to ERANGE ? */
 		client->disconnect = 0;
 		return 0;
 	}
 
 
-    switch (request.type) {
+	switch (request.type)
+	{
 	case REQUEST_READ:
 		break;
 	case REQUEST_WRITE:
@@ -406,22 +414,15 @@ int client_request_needs_reply(struct client *client,
 		debug("request disconnect");
 		client->disconnect = 1;
 		return 0;
-    case REQUEST_FLUSH:
-	break;
+
 	default:
-	/* NBD prototcol says servers SHOULD return EINVAL to unknown
-	 * commands */
-	warn("Unknown request 0x%08X", request.type);
-	client_write_reply(client, &request, EINVAL);
-	client->disconnect = 0;
-	return 0;
+		fatal("Unknown request 0x%08X", request.type);
 	}
 	return 1;
 }
 
 
-void client_reply_to_read(struct client *client,
-			  struct nbd_request request)
+void client_reply_to_read( struct client* client, struct nbd_request request )
 {
 	off64_t offset;
 
@@ -434,74 +435,55 @@ void client_reply_to_read(struct client *client,
 	/* If we get cut off partway through this sendfile, we don't
 	 * want to kill the server.  This should be an error.
 	 */
-    ERROR_IF_NEGATIVE(sendfileloop(client->socket,
+	ERROR_IF_NEGATIVE(
+			sendfileloop(
+				client->socket,
 				client->fileno,
 				&offset,
 				request.len),
 			"sendfile failed from=%ld, len=%d",
-		      offset, request.len);
+			offset,
+			request.len);
 
 	sock_set_tcp_cork( client->socket, 0 );
 }
 
 
-void client_reply_to_write(struct client *client,
-			   struct nbd_request request)
+void client_reply_to_write( struct client* client, struct nbd_request request )
 {
-    debug("request write from=%" PRIu64 ", len=%" PRIu32 ", handle=0x%08X",
-	  request.from, request.len, request.handle);
-    if (client->serve->allocation_map_built) {
+	debug("request write from=%"PRIu64", len=%"PRIu32", handle=0x%08X", request.from, request.len, request.handle);
+	// TODO: Just write directly for now.  Not (yet) convinced my changes later on work.
+	// if (client->serve->allocation_map_built) {
+	if (0) {
 		write_not_zeroes( client, request.from, request.len );
-    } else {
+	}
+	else {
 		debug("No allocation map, writing directly.");
 		/* If we get cut off partway through reading this data:
 		 * */
-	ERROR_IF_NEGATIVE(readloop(client->socket,
-				   client->mapped + request.from,
+		struct iommap *iommap = iommap_alloc(client->fileno, request.from, request.len); 
+
+		ERROR_IF_NEGATIVE(
+			readloop( client->socket,
+				iommap->buf,
 				request.len),
 			"reading write data failed from=%ld, len=%d",
-			  request.from, request.len);
+			request.from,
+			request.len
+		);
 
+		iommap_sync(iommap);
+		iommap_free(iommap);
 		/* the allocation_map is shared between client threads, and may be
 		 * being built. We need to reflect the write in it, as it may be in
 		 * a position the builder has already gone over.
 		 */
-	bitset_set_range(client->serve->allocation_map, request.from,
-			 request.len);
+		bitset_set_range(client->serve->allocation_map, request.from, request.len);
 	}
 
-    // Only flush if FUA is set -- overridden for now to force flush after each
-    // write.
-    // if (request.flags & CMD_FLAG_FUA) {
-    if (1) {
-	/* multiple of page size */
-	uint64_t from_rounded =
-	    request.from & (~(sysconf(_SC_PAGE_SIZE) - 1));
-	uint64_t len_rounded = request.len + (request.from - from_rounded);
-	debug("Calling msync from=%" PRIu64 ", len=%" PRIu64 "",
-	      from_rounded, len_rounded);
-
-	FATAL_IF_NEGATIVE(msync(client->mapped + from_rounded,
-				len_rounded,
-				MS_SYNC | MS_INVALIDATE),
-			  "msync failed %ld %ld", request.from,
-			  request.len);
-    }
 	client_write_reply( client, &request, 0);
 }
 
-void client_reply_to_flush(struct client *client,
-			   struct nbd_request request)
-{
-    debug("request flush from=%" PRIu64 ", len=%" PRIu32 ", handle=0x%08X",
-	  request.from, request.len, request.handle);
-
-    ERROR_IF_NEGATIVE(msync
-		      (client->mapped, client->mapped_size,
-		       MS_SYNC | MS_INVALIDATE), "flush failed");
-
-    client_write_reply(client, &request, 0);
-}
 
 void client_reply( struct client* client, struct nbd_request request )
 {
@@ -512,9 +494,6 @@ void client_reply(struct client *client, struct nbd_request request)
 	case REQUEST_WRITE:
 		client_reply_to_write( client, request );
 		break;
-    case REQUEST_FLUSH:
-	client_reply_to_flush(client, request);
-	break;
 	}
 }
 
@@ -535,7 +514,8 @@ void client_arm_killswitch(struct client *client)
 
 	debug( "Arming killswitch" );
 
-    FATAL_IF_NEGATIVE(timer_settime(client->killswitch, 0, &its, NULL),
+	FATAL_IF_NEGATIVE(
+		timer_settime( client->killswitch, 0, &its, NULL ),
 		SHOW_ERRNO( "Failed to arm killswitch" )
 	);
 
@@ -555,7 +535,8 @@ void client_disarm_killswitch(struct client *client)
 
 	debug( "Disarming killswitch" );
 
-    FATAL_IF_NEGATIVE(timer_settime(client->killswitch, 0, &its, NULL),
+	FATAL_IF_NEGATIVE(
+		timer_settime( client->killswitch, 0, &its, NULL ),
 		SHOW_ERRNO( "Failed to disarm killswitch" )
 	);
 
@@ -591,9 +572,8 @@ int client_serve_request(struct client *client)
 	if ( fd_count == 0 ) {
 		/* This "can't ever happen" */
 		fatal( "No FDs selected, and no timeout!" );
-    } else if (fd_count < 0) {
-	fatal("Select failed");
 	}
+	else if ( fd_count < 0 ) { fatal( "Select failed" ); }
 
 	if ( self_pipe_fd_isset( client->stop_signal, &rfds ) ){
 		debug("Client received stop signal.");
@@ -666,41 +646,33 @@ void client_cleanup(struct client *client,
 		debug("Closed client socket fd %d", client->socket);
 		client->socket = -1;
 	}
-    if (client->mapped) {
-	munmap(client->mapped, client->serve->size);
-    }
 	if (client->fileno) {
 		FATAL_IF_NEGATIVE( close(client->fileno),
-			  "Error closing file %d", client->fileno);
+			"Error closing file %d",
+			client->fileno );
 		debug("Closed client file fd %d", client->fileno );
 		client->fileno = -1;
 	}
 
-    if (server_acl_locked(client->serve)) {
-	server_unlock_acl(client->serve);
-    }
+	if ( server_acl_locked( client->serve ) ) { server_unlock_acl( client->serve ); }
 
 }
 
 void* client_serve(void* client_uncast)
 {
 	struct client* client = (struct client*) client_uncast;
+	void** a = NULL;
 
 	error_set_handler((cleanup_handler*) client_cleanup, client);
-
 	info("client: mmaping file");
-    FATAL_IF_NEGATIVE(open_and_mmap(client->serve->filename,
+	FATAL_IF_NEGATIVE(
+		open_and_mmap(
+			client->serve->filename,
 			&client->fileno,
-				    &client->mapped_size,
-				    (void **) &client->mapped),
-		      "Couldn't open/mmap file %s: %s",
-		      client->serve->filename, strerror(errno)
-	);
-
-    FATAL_IF_NEGATIVE(madvise
-		      (client->mapped, client->serve->size, MADV_RANDOM),
-		      SHOW_ERRNO("Failed to madvise() %s",
-				 client->serve->filename)
+			NULL,
+			a
+		),
+		"Couldn't open/mmap file %s: %s", client->serve->filename, strerror( errno )
 	);
 
 	debug( "Opened client file fd %d", client->fileno);
@@ -708,7 +680,8 @@ void *client_serve(void *client_uncast)
 	client_send_hello(client);
 
 	debug("client: serving requests");
-    while (client_serve_request(client) == 0);
+	while (client_serve_request(client) == 0)
+		;
 	debug("client: stopped serving requests");
 	client->stopped = 1;
 
@@ -717,10 +690,10 @@ void *client_serve(void *client_uncast)
 		server_control_arrived( client->serve );
 	}
 
-    debug("Cleaning client %p up normally in thread %p", client,
-	  pthread_self());
+	debug("Cleaning client %p up normally in thread %p", client, pthread_self());
 	client_cleanup(client, 0);
 	debug("Client thread done" );
 
 	return NULL;
 }
+

src/server/client.h

@@ -3,7 +3,6 @@
 
 #include <signal.h>
 #include <time.h>
-#include <inttypes.h>
 
 /** CLIENT_HANDLER_TIMEOUT
  * This is the length of time (in seconds) any request can be outstanding for.
@@ -30,9 +29,6 @@ struct client {
 	int     socket;
 
 	int     fileno;
-    char *mapped;
-
-    uint64_t mapped_size;
 
 	struct self_pipe * stop_signal;
 
@@ -56,3 +52,4 @@ void client_destroy(struct client *client);
 void client_signal_stop( struct client * client );
 
 #endif
+

src/server/control.c

@@ -44,7 +44,9 @@
 #include <unistd.h>
 
 
-struct control *control_create(struct flexnbd *flexnbd, const char *csn)
+struct control * control_create(
+		struct flexnbd * flexnbd,
+		const char * csn)
 {
 	struct control * control = xmalloc( sizeof( struct control ) );
 
@@ -78,7 +80,8 @@ void control_destroy(struct control *control)
 	free( control );
 }
 
-struct control_client *control_client_create(struct flexnbd *flexnbd,
+struct control_client * control_client_create(
+		struct flexnbd * flexnbd,
 		int client_fd ,
 		struct mbox * state_mbox )
 {
@@ -109,7 +112,8 @@ void control_handle_client(struct control *control, int client_fd)
 	NULLCHECK( control );
 	NULLCHECK( control->flexnbd );
 	struct control_client * control_client =
-	control_client_create(control->flexnbd,
+		control_client_create(
+				control->flexnbd,
 				client_fd ,
 				control->mirror_state_mbox);
 
@@ -128,8 +132,7 @@ void control_accept_client(struct control *control)
 	union mysockaddr client_address;
 	socklen_t addrlen = sizeof( union mysockaddr );
 
-    client_fd =
-	accept(control->control_fd, &client_address.generic, &addrlen);
+	client_fd = accept( control->control_fd, &client_address.generic, &addrlen );
 	FATAL_IF( -1 == client_fd, "control accept failed" );
 
 	control_handle_client( control, client_fd );
@@ -175,23 +178,25 @@ int open_control_socket(const char *socket_name)
 	}
 
 	control_fd = socket(AF_UNIX, SOCK_STREAM, 0);
-    FATAL_IF_NEGATIVE(control_fd, "Couldn't create control socket");
+	FATAL_IF_NEGATIVE(control_fd ,
+	  "Couldn't create control socket");
 
 	memset(&bind_address, 0, sizeof(struct sockaddr_un));
 	bind_address.sun_family = AF_UNIX;
-    strncpy(bind_address.sun_path, socket_name,
-	    sizeof(bind_address.sun_path) - 1);
+	strncpy(bind_address.sun_path, socket_name, sizeof(bind_address.sun_path)-1);
 
 	//unlink(socket_name); /* ignore failure */
 
-    FATAL_IF_NEGATIVE(bind
-		      (control_fd, &bind_address, sizeof(bind_address)),
+	FATAL_IF_NEGATIVE(
+		bind(control_fd , &bind_address, sizeof(bind_address)),
 		"Couldn't bind control socket to %s: %s",
 		socket_name, strerror( errno )
 	);
 
-    FATAL_IF_NEGATIVE(listen(control_fd, 5),
-		      "Couldn't listen on control socket");
+	FATAL_IF_NEGATIVE(
+		listen(control_fd , 5),
+		"Couldn't listen on control socket"
+	);
 	return control_fd;
 }
 
@@ -224,7 +229,8 @@ void control_serve(struct control *control)
 }
 
 
-void control_cleanup(struct control *control,
+void control_cleanup(
+		struct control * control,
 		int fatal __attribute__((unused)) )
 {
 	NULLCHECK( control );
@@ -250,8 +256,7 @@ void *control_runner(void *control_uncast)
 
 #define write_socket(msg) write(client_fd, (msg "\n"), strlen((msg))+1)
 
-void control_write_mirror_response(enum mirror_state mirror_state,
-				   int client_fd)
+void control_write_mirror_response( enum mirror_state mirror_state, int client_fd )
 {
 	switch (mirror_state) {
 		case MS_INIT:
@@ -281,12 +286,12 @@ void control_write_mirror_response(enum mirror_state mirror_state,
 			fatal( "Unhandled mirror state: %d", mirror_state );
 	}
 }
-
 #undef write_socket
 
 
 /* Call this in the thread where you want to receive the mirror state */
-enum mirror_state control_client_mirror_wait(struct control_client *client)
+enum mirror_state control_client_mirror_wait(
+		struct control_client* client)
 {
 	NULLCHECK( client );
 	NULLCHECK( client->mirror_state_mbox );
@@ -340,11 +345,14 @@ int control_mirror(struct control_client *client, int linesc, char **lines)
 	if (linesc > 2) {
 		if (strcmp("exit", lines[2]) == 0) {
 			action_at_finish = ACTION_EXIT;
-	} else if (strcmp("unlink", lines[2]) == 0) {
+		}
+		else if (strcmp( "unlink", lines[2]) == 0 ) {
 			action_at_finish = ACTION_UNLINK;
-	} else if (strcmp("nothing", lines[2]) == 0) {
+		}
+		else if (strcmp("nothing", lines[2]) == 0) {
 			action_at_finish = ACTION_NOTHING;
-	} else {
+		}
+		else {
 			write_socket("1: action must be 'exit' or 'nothing'");
 			return -1;
 		}
@@ -381,13 +389,13 @@ int control_mirror(struct control_client *client, int linesc, char **lines)
 	server_lock_start_mirror( serve );
 	{
 		if ( server_mirror_can_start( serve ) ) {
-	    serve->mirror_super = mirror_super_create(serve->filename,
+			serve->mirror_super = mirror_super_create(
+					serve->filename,
 					connect_to,
 					connect_from,
 					max_Bps ,
 					action_at_finish,
-						      client->
-						      mirror_state_mbox);
+					client->mirror_state_mbox );
 			serve->mirror = serve->mirror_super->mirror;
 			server_prevent_mirror_start( serve );
 		} else {
@@ -407,14 +415,18 @@ int control_mirror(struct control_client *client, int linesc, char **lines)
 	 * sighandler can block the serve thread
 	 */
 	if ( serve->mirror_super ) {
-	FATAL_IF(0 != pthread_create(&serve->mirror_super->thread,
+		FATAL_IF( 0 != pthread_create(
+					&serve->mirror_super->thread,
 					NULL,
 					mirror_super_runner,
-				     serve),
-		 "Failed to create mirror thread");
+					serve
+					),
+				"Failed to create mirror thread"
+			);
 
 		debug("Control thread mirror super waiting");
-	enum mirror_state state = control_client_mirror_wait(client);
+		enum mirror_state state =
+			control_client_mirror_wait( client );
 		debug("Control thread writing response");
 		control_write_mirror_response( state, client->socket );
 	}
@@ -424,8 +436,7 @@ int control_mirror(struct control_client *client, int linesc, char **lines)
 	return 0;
 }
 
-int control_mirror_max_bps(struct control_client *client, int linesc,
-			   char **lines)
+int control_mirror_max_bps( struct control_client* client, int linesc, char** lines )
 {
 	NULLCHECK( client );
 	NULLCHECK( client->flexnbd );
@@ -478,7 +489,8 @@ int control_acl(struct control_client *client, int linesc, char **lines)
 				strlen(lines[new_acl->len]));
 		write(client->socket, "\n", 1);
 		acl_destroy( new_acl );
-    } else {
+	}
+	else {
 		flexnbd_replace_acl( flexnbd, new_acl );
 		info("ACL set");
 		write( client->socket, "0: updated\n", 11);
@@ -488,7 +500,8 @@ int control_acl(struct control_client *client, int linesc, char **lines)
 }
 
 
-int control_break(struct control_client *client,
+int control_break(
+		struct control_client* client,
 		int linesc __attribute__ ((unused)),
 		char** lines __attribute__((unused))
 		)
@@ -511,10 +524,13 @@ int control_break(struct control_client *client,
 
 			if ( server_is_closed( serve ) ) {
 				info( "Mirror completed while canceling" );
-		write(client->socket, "1: mirror completed\n", 20);
-	    } else {
+				write( client->socket,
+						"1: mirror completed\n", 20 );
+			}
+			else {
 				info( "Mirror successfully stopped." );
-		write(client->socket, "0: mirror stopped\n", 18);
+				write( client->socket,
+						"0: mirror stopped\n", 18 );
 				result = 1;
 			}
 
@@ -530,7 +546,8 @@ int control_break(struct control_client *client,
 
 
 /** FIXME: add some useful statistics */
-int control_status(struct control_client *client,
+int control_status(
+		struct control_client* client,
 		int linesc __attribute__ ((unused)),
 		char** lines __attribute__((unused))
 		)
@@ -549,14 +566,10 @@ int control_status(struct control_client *client,
 void control_client_cleanup(struct control_client* client,
 		int fatal __attribute__ ((unused)) )
 {
-    if (client->socket) {
-	close(client->socket);
-    }
+	if (client->socket) { close(client->socket); }
 
 	/* This is wrongness */
-    if (server_acl_locked(client->flexnbd->serve)) {
-	server_unlock_acl(client->flexnbd->serve);
-    }
+	if ( server_acl_locked( client->flexnbd->serve ) ) { server_unlock_acl( client->flexnbd->serve ); }
 
 	control_client_destroy( client );
 }
@@ -571,25 +584,30 @@ void control_respond(struct control_client *client)
 	int i, linesc;
 	linesc = read_lines_until_blankline(client->socket, 256, &lines);
 
-    if (linesc < 1) {
+	if (linesc < 1)
+	{
 		write(client->socket, "9: missing command\n", 19);
 		/* ignore failure */
-    } else if (strcmp(lines[0], "acl") == 0) {
+	}
+	else if (strcmp(lines[0], "acl") == 0) {
 		info("acl command received" );
 		if (control_acl(client, linesc-1, lines+1) < 0) {
 			debug("acl command failed");
 		}
-    } else if (strcmp(lines[0], "mirror") == 0) {
+	}
+	else if (strcmp(lines[0], "mirror") == 0) {
 		info("mirror command received" );
 		if (control_mirror(client, linesc-1, lines+1) < 0) {
 			debug("mirror command failed");
 		}
-    } else if (strcmp(lines[0], "break") == 0) {
+	}
+	else if (strcmp(lines[0], "break") == 0) {
 		info( "break command received" );
 		if ( control_break( client, linesc-1, lines+1) < 0) {
 			debug( "break command failed" );
 		}
-    } else if (strcmp(lines[0], "status") == 0) {
+	}
+	else if (strcmp(lines[0], "status") == 0) {
 		info("status command received" );
 		if (control_status(client, linesc-1, lines+1) < 0) {
 			debug("status command failed");
@@ -599,7 +617,8 @@ void control_respond(struct control_client *client)
 		if( control_mirror_max_bps( client, linesc-1, lines+1 ) < 0 ) {
 			debug( "mirror_max_bps command failed" );
 		}
-    } else {
+	}
+	else {
 		write(client->socket, "10: unknown command\n", 23);
 	}
 
@@ -611,3 +630,4 @@ void control_respond(struct control_client *client)
 	control_client_cleanup(client, 0);
 	debug("control command handled" );
 }
+

src/server/control.h

@@ -44,15 +44,16 @@ struct control_client {
 	struct mbox * mirror_state_mbox;
 };
 
-struct control *control_create(struct flexnbd *,
+struct control * control_create(
+		struct flexnbd *,
 		const char * control_socket_name );
 void control_signal_close( struct control * );
 void control_destroy( struct control * );
 
 void * control_runner( void * );
 
-void accept_control_connection(struct server *params, int client_fd,
-			       union mysockaddr *client_address);
+void accept_control_connection(struct server* params, int client_fd, union mysockaddr* client_address);
 void serve_open_control_socket(struct server* params);
 
 #endif
+

src/server/flexnbd.c

@@ -61,13 +61,16 @@ int flexnbd_build_signal_fd(void)
 }
 
 
-void flexnbd_create_shared(struct flexnbd *flexnbd,
+void flexnbd_create_shared(
+	struct flexnbd * flexnbd,
 	const char * s_ctrl_sock)
 {
 	NULLCHECK( flexnbd );
 	if ( s_ctrl_sock ){
-	flexnbd->control = control_create(flexnbd, s_ctrl_sock);
-    } else {
+		flexnbd->control =
+			control_create( flexnbd, s_ctrl_sock );
+	}
+	else {
 		flexnbd->control = NULL;
 	}
 
@@ -75,7 +78,8 @@ void flexnbd_create_shared(struct flexnbd *flexnbd,
 }
 
 
-struct flexnbd *flexnbd_create_serving(char *s_ip_address,
+struct flexnbd * flexnbd_create_serving(
+	char* s_ip_address,
 	char* s_port,
 	char* s_file,
 	char* s_ctrl_sock,
@@ -86,14 +90,17 @@ struct flexnbd *flexnbd_create_serving(char *s_ip_address,
 	int use_killswitch)
 {
 	struct flexnbd * flexnbd = xmalloc( sizeof( struct flexnbd ) );
-    flexnbd->serve = server_create(flexnbd,
+	flexnbd->serve = server_create(
+			flexnbd,
 			s_ip_address,
 			s_port,
 			s_file,
 			default_deny,
 			acl_entries,
 			s_acl_entries,
-				   max_nbd_clients, use_killswitch, 1);
+			max_nbd_clients,
+			use_killswitch,
+			1);
 	flexnbd_create_shared( flexnbd, s_ctrl_sock );
 
 	// Beats installing one handler per client instance
@@ -103,14 +110,17 @@ struct flexnbd *flexnbd_create_serving(char *s_ip_address,
 			.sa_flags = SA_RESTART | SA_SIGINFO
 		};
 
-	FATAL_UNLESS(0 == sigaction(CLIENT_KILLSWITCH_SIGNAL, &act, NULL),
-		     "Installing client killswitch signal failed");
+		FATAL_UNLESS(
+			0 == sigaction( CLIENT_KILLSWITCH_SIGNAL, &act, NULL ),
+			"Installing client killswitch signal failed"
+		);
 	}
 
 	return flexnbd;
 }
 
-struct flexnbd *flexnbd_create_listening(char *s_ip_address,
+struct flexnbd * flexnbd_create_listening(
+		char* s_ip_address,
 		char* s_port,
 		char* s_file,
 		char* s_ctrl_sock,
@@ -119,12 +129,15 @@ struct flexnbd *flexnbd_create_listening(char *s_ip_address,
 		char** s_acl_entries )
 {
 	struct flexnbd * flexnbd = xmalloc( sizeof( struct flexnbd ) );
-    flexnbd->serve = server_create(flexnbd,
+	flexnbd->serve = server_create(
+			flexnbd,
 			s_ip_address,
 			s_port,
 			s_file,
 			default_deny,
-				   acl_entries, s_acl_entries, 1, 0, 0);
+			acl_entries,
+			s_acl_entries,
+			1, 0, 0);
 	flexnbd_create_shared( flexnbd, s_ctrl_sock );
 
 	// listen can't use killswitch, as mirror may pause on sending things
@@ -140,7 +153,8 @@ void flexnbd_spawn_control(struct flexnbd *flexnbd)
 
 	pthread_t * control_thread = &flexnbd->control->thread;
 
-    FATAL_UNLESS(0 == pthread_create(control_thread,
+	FATAL_UNLESS( 0 == pthread_create(
+				control_thread,
 				NULL,
 				control_runner,
 				flexnbd->control ),
@@ -219,7 +233,9 @@ void make_writable(const char *filename)
 {
 	NULLCHECK( filename );
 	FATAL_IF_NEGATIVE( chmod( filename, S_IWUSR ),
-		      "Couldn't chmod %s: %s", filename, strerror(errno));
+			"Couldn't chmod %s: %s",
+			filename,
+			strerror( errno ) );
 }
 
 
@@ -246,3 +262,4 @@ int flexnbd_serve(struct flexnbd *flexnbd)
 
 	return success;
 }
+

src/server/flexnbd.h

@@ -29,7 +29,8 @@ struct flexnbd {
 
 
 struct flexnbd * flexnbd_create(void);
-struct flexnbd *flexnbd_create_serving(char *s_ip_address,
+struct flexnbd * flexnbd_create_serving(
+	char* s_ip_address,
 	char* s_port,
 	char* s_file,
 	char* s_ctrl_sock,
@@ -39,7 +40,8 @@ struct flexnbd *flexnbd_create_serving(char *s_ip_address,
 	int max_nbd_clients,
 	int use_killswitch);
 
-struct flexnbd *flexnbd_create_listening(char *s_ip_address,
+struct flexnbd * flexnbd_create_listening(
+	char* s_ip_address,
 	char* s_port,
 	char* s_file,
 	char* s_ctrl_sock,
@@ -61,3 +63,4 @@ struct server *flexnbd_server(struct flexnbd *flexnbd);
 void flexnbd_replace_acl( struct flexnbd * flexnbd, struct acl * acl );
 struct status * flexnbd_status_create( struct flexnbd * flexnbd );
 #endif
+

src/server/flexthread.c

@@ -22,14 +22,15 @@ void flexthread_mutex_destroy(struct flexthread_mutex *ftm)
 
 	if( flexthread_mutex_held( ftm ) ) {
 		flexthread_mutex_unlock( ftm );
-    } else if ((pthread_t) NULL != ftm->holder) {
+	}
+	else if ( (pthread_t)NULL != ftm->holder ) {
 		/* This "should never happen": if we can try to destroy
 		 * a mutex currently held by another thread, there's a
 		 * logic bug somewhere.  I know the test here is racy,
 		 * but there's not a lot we can do about it at this
 		 * point.
 		 */
-	fatal("Attempted to destroy a flexthread_mutex"
+		fatal( "Attempted to destroy a flexthread_mutex"\
 				" held by another thread!" );
 	}
 
@@ -71,3 +72,4 @@ int flexthread_mutex_held(struct flexthread_mutex *ftm)
 	NULLCHECK( ftm );
 	return pthread_self() == ftm->holder;
 }
+

src/server/mirror.c

@@ -90,7 +90,8 @@ struct mirror_ctrl {
 
 };
 
-struct mirror *mirror_alloc(union mysockaddr *connect_to,
+struct mirror * mirror_alloc(
+		union mysockaddr * connect_to,
 		union mysockaddr * connect_from,
 		uint64_t max_Bps,
 		enum mirror_finish_action action_at_finish,
@@ -143,13 +144,19 @@ void mirror_init(struct mirror *mirror, const char *filename)
 	NULLCHECK( mirror );
 	NULLCHECK( filename );
 
-    FATAL_IF_NEGATIVE(open_and_mmap(filename,
+	FATAL_IF_NEGATIVE(
+		open_and_mmap(
+			filename,
 			&map_fd,
 			&size,
-				    (void **) &mirror->mapped),
-		      "Failed to open and mmap %s", filename);
+			(void**) &mirror->mapped
+		),
+		"Failed to open and mmap %s",
+		filename
+	);
 
-    FATAL_IF_NEGATIVE(madvise(mirror->mapped, size, MADV_SEQUENTIAL),
+	FATAL_IF_NEGATIVE(
+		madvise( mirror->mapped, size, MADV_SEQUENTIAL ),
 		SHOW_ERRNO( "Failed to madvise() %s", filename )
 	);
 }
@@ -169,7 +176,8 @@ void mirror_reset(struct mirror *mirror)
 }
 
 
-struct mirror *mirror_create(const char *filename,
+struct mirror * mirror_create(
+		const char * filename,
 		union mysockaddr * connect_to,
 		union mysockaddr * connect_from,
 		uint64_t max_Bps,
@@ -181,7 +189,9 @@ struct mirror *mirror_create(const char *filename,
 
 	mirror = mirror_alloc( connect_to,
 			connect_from,
-			  max_Bps, action_at_finish, commit_signal);
+			max_Bps,
+			action_at_finish,
+			commit_signal);
 
 	mirror_init( mirror, filename );
 	mirror_reset( mirror );
@@ -271,8 +281,7 @@ int mirror_connect(struct mirror *mirror, uint64_t local_size)
 
 	NULLCHECK( mirror->connect_to );
 
-    mirror->client =
-	socket_connect(&mirror->connect_to->generic, connect_from);
+	mirror->client = socket_connect(&mirror->connect_to->generic, connect_from);
 	if ( 0 < mirror->client ) {
 		fd_set fds;
 		struct timeval tv = { MS_HELLO_TIME_SECS, 0};
@@ -284,30 +293,30 @@ int mirror_connect(struct mirror *mirror, uint64_t local_size)
 
 		if( FD_ISSET( mirror->client, &fds ) ){
 			uint64_t remote_size;
-	    uint32_t remote_flags;
-	    if (socket_nbd_read_hello
-		(mirror->client, &remote_size, &remote_flags)) {
+			if ( socket_nbd_read_hello( mirror->client, &remote_size ) ) {
 				if( remote_size == local_size ){
 					connected = 1;
 					mirror_set_state( mirror, MS_GO );
-		} else {
+				}
+				else {
 					warn("Remote size (%d) doesn't match local (%d)",
 							remote_size, local_size );
 					mirror_set_state( mirror, MS_FAIL_SIZE_MISMATCH );
 				}
-	    } else {
+			}
+			else {
 				warn( "Mirror attempt rejected." );
 				mirror_set_state( mirror, MS_FAIL_REJECTED );
 			}
-	} else {
+		}
+		else {
 			warn( "No NBD Hello received." );
 			mirror_set_state( mirror, MS_FAIL_NO_HELLO );
 		}
 
-	if (!connected) {
-	    close(mirror->client);
+		if ( !connected ) { close( mirror->client ); }
 	}
-    } else {
+	else {
 		warn( "Mirror failed to connect.");
 		mirror_set_state( mirror, MS_FAIL_CONNECT );
 	}
@@ -362,15 +371,12 @@ int mirror_setup_next_xfer(struct mirror_ctrl *ctrl)
 	 * full, and stop when it's a quarter full. This stops a busy client from
 	 * stalling a migration forever. FIXME: made-up numbers.
 	 */
-    if (mirror->offset < serve->size
-	&& bitset_stream_size(serve->allocation_map) >
-	BITSET_STREAM_SIZE / 2) {
+	if ( mirror->offset < serve->size && bitset_stream_size( serve->allocation_map ) > BITSET_STREAM_SIZE / 2 ) {
 		ctrl->clear_events = 1;
 	}
 
 
-    while ((mirror->offset == serve->size || ctrl->clear_events)
-	   && e.event != BITSET_STREAM_SET) {
+	while ( ( mirror->offset == serve->size || ctrl->clear_events ) && e.event != BITSET_STREAM_SET ) {
 		uint64_t events =  bitset_stream_size( serve->allocation_map );
 
 		if ( events == 0 ) {
@@ -402,8 +408,7 @@ int mirror_setup_next_xfer(struct mirror_ctrl *ctrl)
 		return 0;
 	}
 
-    debug("Next transfer: current=%" PRIu64 ", run=%" PRIu64, current,
-	  run);
+	debug( "Next transfer: current=%"PRIu64", run=%"PRIu64, current, run );
 	struct nbd_request req = {
 		.magic = REQUEST_MAGIC,
 		.type = REQUEST_WRITE,
@@ -455,8 +460,7 @@ static void mirror_write_cb(struct ev_loop *loop, ev_io * w, int revents)
 		return;
 	}
 
-    debug("Mirror write callback invoked with events %d. fd: %i", revents,
-	  ctrl->mirror->client);
+	debug( "Mirror write callback invoked with events %d. fd: %i", revents, ctrl->mirror->client );
 
 	/* FIXME: We can end up corking multiple times in unusual circumstances; this
 	 * is annoying, but harmless */
@@ -468,8 +472,7 @@ static void mirror_write_cb(struct ev_loop *loop, ev_io * w, int revents)
 		data_loc = ( (char*) &xfer->hdr.req_raw ) + ctrl->xfer.written;
 		to_write = hdr_size - xfer->written;
 	} else {
-	data_loc =
-	    ctrl->mirror->mapped + xfer->from + (xfer->written - hdr_size);
+		data_loc = ctrl->mirror->mapped  + xfer->from + ( xfer->written - hdr_size );
 		to_write = xfer->len - ( ctrl->xfer.written - hdr_size );
 	}
 
@@ -482,14 +485,14 @@ static void mirror_write_cb(struct ev_loop *loop, ev_io * w, int revents)
 		return;
 	}
 	debug( "Wrote %"PRIu64" bytes", count );
-    debug("to_write was %" PRIu64 ", xfer->written was %" PRIu64, to_write,
-	  xfer->written);
+	debug( "to_write was %"PRIu64", xfer->written was %"PRIu64, to_write, xfer->written );
 
 	// We wrote some bytes, so reset the timer and keep track for the next pass
 	if ( count > 0 ) {
 		ctrl->xfer.written += count;
 		ev_timer_again( ctrl->ev_loop, &ctrl->timeout_watcher );
 	}
+
 	// All bytes written, so now we need to read the NBD reply back.
 	if ( ctrl->xfer.written == ctrl->xfer.len + hdr_size ) {
 	  sock_set_tcp_cork( ctrl->mirror->client, 0 ) ;
@@ -520,13 +523,10 @@ static void mirror_read_cb(struct ev_loop *loop, ev_io * w, int revents)
 	ssize_t count;
 	uint64_t left = sizeof( struct nbd_reply_raw ) - xfer->read;
 
-    debug("Mirror read callback invoked with events %d. fd:%i", revents,
-	  m->client);
+	debug( "Mirror read callback invoked with events %d. fd:%i", revents, m->client );
 
 	/* Start / continue reading the NBD response from the mirror. */
-    if ((count =
-	 read(m->client, ((void *) &xfer->hdr.rsp_raw) + xfer->read,
-	      left)) < 0) {
+	if ( ( count = read( m->client, ((void*) &xfer->hdr.rsp_raw) + xfer->read, left ) ) < 0 ) {
 		if ( errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR ) {
 			warn( SHOW_ERRNO( "Couldn't read from listener" ) );
 			ev_break( loop, EVBREAK_ONE );
@@ -540,12 +540,12 @@ static void mirror_read_cb(struct ev_loop *loop, ev_io * w, int revents)
 		ev_break( loop, EVBREAK_ONE );
 		return;
 	}
+
 	// We read some bytes, so reset the timer
 	ev_timer_again( ctrl->ev_loop, &ctrl->timeout_watcher );
 
 	debug( "Read %i bytes", count );
-    debug("left was %" PRIu64 ", xfer->read was %" PRIu64, left,
-	  xfer->read);
+	debug( "left was %"PRIu64", xfer->read was %"PRIu64, left, xfer->read );
 	xfer->read += count;
 
 	if ( xfer->read < sizeof( struct nbd_reply_raw ) ) {
@@ -602,9 +602,7 @@ static void mirror_read_cb(struct ev_loop *loop, ev_io * w, int revents)
 	debug( "next_xfer: %d", next_xfer );
 
 	/* Regardless of time estimates, if there's no waiting transfer, we can start closing clients down. */
-    if (!ctrl->clients_closed
-	&& (!next_xfer
-	    || server_mirror_eta(ctrl->serve) < MS_CONVERGE_TIME_SECS)) {
+	if ( !ctrl->clients_closed && ( !next_xfer || server_mirror_eta( ctrl->serve ) < MS_CONVERGE_TIME_SECS ) ) {
 		info( "Closing clients to allow mirroring to converge" );
 		server_forbid_new_clients( ctrl->serve );
 		server_close_clients( ctrl->serve );
@@ -645,8 +643,7 @@ static void mirror_read_cb(struct ev_loop *loop, ev_io * w, int revents)
 	return;
 }
 
-static void mirror_timeout_cb(struct ev_loop *loop, ev_timer * w
-			      __attribute__ ((unused)), int revents)
+static void mirror_timeout_cb( struct ev_loop *loop, ev_timer *w __attribute__((unused)), int revents )
 {
 	if ( !(revents & EV_TIMER ) ) {
 		warn( "Mirror timeout called but no timer event signalled" );
@@ -676,8 +673,7 @@ static void mirror_abandon_cb(struct ev_loop *loop, ev_io * w, int revents)
 }
 
 
-static void mirror_limit_cb(struct ev_loop *loop, ev_timer * w,
-			    int revents)
+static void mirror_limit_cb( struct ev_loop *loop, ev_timer *w, int revents )
 {
 	struct mirror_ctrl* ctrl = (struct mirror_ctrl*) w->data;
 	NULLCHECK( ctrl );
@@ -688,8 +684,7 @@ static void mirror_limit_cb(struct ev_loop *loop, ev_timer * w,
 	}
 
 	if ( mirror_should_wait( ctrl ) ) {
-	debug("max_bps exceeded, waiting",
-	      ctrl->mirror->max_bytes_per_second);
+		debug( "max_bps exceeded, waiting", ctrl->mirror->max_bytes_per_second );
 		ev_timer_again( loop, w );
 	} else {
 		/* We're below the limit, so do the next request */
@@ -706,8 +701,7 @@ static void mirror_limit_cb(struct ev_loop *loop, ev_timer * w,
  * if it has, start migrating. If it's not finished, then enabling the bitset
  * stream does not go well for us.
  */
-static void mirror_begin_cb(struct ev_loop *loop, ev_timer * w,
-			    int revents)
+static void mirror_begin_cb( struct ev_loop *loop, ev_timer *w, int revents )
 {
 	struct mirror_ctrl* ctrl = (struct mirror_ctrl*) w->data;
 	NULLCHECK( ctrl );
@@ -717,8 +711,7 @@ static void mirror_begin_cb(struct ev_loop *loop, ev_timer * w,
 		return;
 	}
 
-    if (ctrl->serve->allocation_map_built
-	|| ctrl->serve->allocation_map_not_built) {
+	if ( ctrl->serve->allocation_map_built || ctrl->serve->allocation_map_not_built ) {
 		info( "allocation map builder is finished, beginning migration" );
 		ev_timer_stop( loop, w );
 		/* Start by writing xfer 0 to the listener */
@@ -803,8 +796,10 @@ void mirror_run(struct server *serve)
 	ctrl.abandon_watcher.data = (void*) &ctrl;
 	ev_io_start( ctrl.ev_loop, &ctrl.abandon_watcher );
 
-    ERROR_UNLESS(mirror_setup_next_xfer(&ctrl),
-		 "Couldn't find first transfer for mirror!");
+	ERROR_UNLESS(
+		mirror_setup_next_xfer( &ctrl ),
+		"Couldn't find first transfer for mirror!"
+	);
 
 
 	if ( serve->allocation_map_built ) {
@@ -835,8 +830,7 @@ void mirror_run(struct server *serve)
 	 * it to something sane - they just terminate the event loop with state !=
 	 * MS_DONE. We re-allow new clients here if necessary.
 	 */
-    if (m->action_at_finish == ACTION_NOTHING
-	|| m->commit_state != MS_DONE) {
+	if ( m->action_at_finish == ACTION_NOTHING || m->commit_state != MS_DONE ) {
 		server_allow_new_clients( serve );
 	}
 
@@ -902,9 +896,7 @@ void *mirror_runner(void *serve_params_uncast)
 	time_t start_time = time(NULL);
 	int connected = mirror_connect( mirror, serve->size );
 	mirror_signal_commit( mirror );
-    if (!connected) {
-	goto abandon_mirror;
-    }
+	if ( !connected ) { goto abandon_mirror; }
 
 	/* After this point, if we see a failure we need to disconnect
 	 * and retry everything from mirror_set_state(_, MS_INIT), but
@@ -940,33 +932,38 @@ void *mirror_runner(void *serve_params_uncast)
 }
 
 
-struct mirror_super *mirror_super_create(const char *filename,
+struct mirror_super * mirror_super_create(
+		const char * filename,
 		union mysockaddr * connect_to,
 		union mysockaddr * connect_from,
 		uint64_t max_Bps,
-					 enum mirror_finish_action
-					 action_at_finish,
+		enum mirror_finish_action action_at_finish,
 		struct mbox * state_mbox)
 {
 	struct mirror_super * super = xmalloc( sizeof( struct mirror_super) );
-    super->mirror = mirror_create(filename,
+	super->mirror = mirror_create(
+			filename,
 			connect_to,
 			connect_from,
 			max_Bps,
-				  action_at_finish, mbox_create());
+			action_at_finish,
+			mbox_create() ) ;
 	super->state_mbox = state_mbox;
 	return super;
 }
 
 
 /* Post the current state of the mirror into super->state_mbox.*/
-void mirror_super_signal_committed(struct mirror_super *super,
+void mirror_super_signal_committed(
+		struct mirror_super * super ,
 		enum mirror_state commit_state )
 {
 	NULLCHECK( super );
 	NULLCHECK( super->state_mbox );
 
-    mbox_post_mirror_state(super->state_mbox, commit_state);
+	mbox_post_mirror_state(
+			super->state_mbox,
+			commit_state );
 }
 
 
@@ -1000,7 +997,8 @@ void *mirror_super_runner(void *serve_uncast)
 	struct mirror_super *  super  = serve->mirror_super;
 
 	do {
-	FATAL_IF(0 != pthread_create(&mirror->thread,
+		FATAL_IF( 0 != pthread_create(
+					&mirror->thread,
 					NULL,
 					mirror_runner,
 					serve),
@@ -1020,7 +1018,9 @@ void *mirror_super_runner(void *serve_uncast)
 			should_retry = *commit_state == MS_GO;
 
 			/* Only send this signal the first time */
-	    mirror_super_signal_committed(super, *commit_state);
+			mirror_super_signal_committed(
+					super,
+					*commit_state);
 			debug("Mirror supervisor committed");
 		}
 		/* We only care about the value of the commit signal on

src/server/mirror.h

@@ -127,13 +127,15 @@ struct mirror_super {
 struct server;
 struct flexnbd;
 
-struct mirror_super *mirror_super_create(const char *filename,
+struct mirror_super * mirror_super_create(
+		const char * filename,
 		union mysockaddr * connect_to,
 		union mysockaddr * connect_from,
 		uint64_t max_Bps,
-					 enum mirror_finish_action
-					 action_at_finish,
-					 struct mbox *state_mbox);
+		enum mirror_finish_action action_at_finish,
+		struct mbox * state_mbox
+		);
 void * mirror_super_runner( void * serve_uncast );
 
 #endif
+

src/server/mode.c

@@ -19,7 +19,6 @@ static struct option serve_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char serve_short_options[] = "hl:p:f:s:dk" SOPT_QUIET SOPT_VERBOSE;
 static char serve_help_text[] =
 	"Usage: flexnbd " CMD_SERVE " <options> [<acl address>*]\n\n"
@@ -29,9 +28,10 @@ static char serve_help_text[] =
 	"\t--" OPT_PORT ",-p <PORT>\tThe port to serve on.\n"
 	"\t--" OPT_FILE ",-f <FILE>\tThe file to serve.\n"
 	"\t--" OPT_DENY ",-d\tDeny connections by default unless in ACL.\n"
-    "\t--" OPT_KILLSWITCH
-    ",-k  \tKill the server if a request takes 120 seconds.\n" SOCK_LINE
-    VERBOSE_LINE QUIET_LINE;
+	"\t--" OPT_KILLSWITCH",-k  \tKill the server if a request takes 120 seconds.\n"
+	SOCK_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 
 static struct option listen_options[] = {
@@ -45,7 +45,6 @@ static struct option listen_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char listen_short_options[] = "hl:p:f:s:d" SOPT_QUIET SOPT_VERBOSE;
 static char listen_help_text[] =
 	"Usage: flexnbd " CMD_LISTEN " <options> [<acl_address>*]\n\n"
@@ -55,7 +54,9 @@ static char listen_help_text[] =
 	"\t--" OPT_PORT ",-p <PORT>\tThe port to listen on.\n"
 	"\t--" OPT_FILE ",-f <FILE>\tThe file to serve.\n"
 	"\t--" OPT_DENY ",-d\tDeny connections by default unless in ACL.\n"
-    SOCK_LINE VERBOSE_LINE QUIET_LINE;
+	SOCK_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 static struct option read_options[] = {
 	GETOPT_HELP,
@@ -68,7 +69,6 @@ static struct option read_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char read_short_options[] = "hl:p:F:S:b:" SOPT_QUIET SOPT_VERBOSE;
 static char read_help_text[] =
 	"Usage: flexnbd " CMD_READ " <options>\n\n"
@@ -78,7 +78,9 @@ static char read_help_text[] =
 	"\t--" OPT_PORT ",-p <PORT>\tThe port to read from.\n"
 	"\t--" OPT_FROM ",-F <OFFSET>\tByte offset to read from.\n"
 	"\t--" OPT_SIZE ",-S <SIZE>\tBytes to read.\n"
-    BIND_LINE VERBOSE_LINE QUIET_LINE;
+	BIND_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 
 static struct option *write_options = read_options;
@@ -91,7 +93,9 @@ static char write_help_text[] =
 	"\t--" OPT_PORT ",-p <PORT>\tThe port to write to.\n"
 	"\t--" OPT_FROM ",-F <OFFSET>\tByte offset to write from.\n"
 	"\t--" OPT_SIZE ",-S <SIZE>\tBytes to write.\n"
-    BIND_LINE VERBOSE_LINE QUIET_LINE;
+	BIND_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 static struct option acl_options[] = {
 	GETOPT_HELP,
@@ -100,12 +104,14 @@ static struct option acl_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char acl_short_options[] = "hs:" SOPT_QUIET SOPT_VERBOSE;
 static char acl_help_text[] =
 	"Usage: flexnbd " CMD_ACL " <options> [<acl address>+]\n\n"
 	"Set the access control list for a server with control socket SOCK.\n\n"
-    HELP_LINE SOCK_LINE VERBOSE_LINE QUIET_LINE;
+	HELP_LINE
+	SOCK_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 static struct option mirror_speed_options[] = {
 	GETOPT_HELP,
@@ -115,12 +121,15 @@ static struct option mirror_speed_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char mirror_speed_short_options[] = "hs:m:" SOPT_QUIET SOPT_VERBOSE;
 static char mirror_speed_help_text[] =
 	"Usage: flexnbd " CMD_MIRROR_SPEED " <options>\n\n"
 	"Set the maximum speed of a migration from a mirring server listening on SOCK.\n\n"
-    HELP_LINE SOCK_LINE MAX_SPEED_LINE VERBOSE_LINE QUIET_LINE;
+	HELP_LINE
+	SOCK_LINE
+	MAX_SPEED_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 static struct option mirror_options[] = {
 	GETOPT_HELP,
@@ -133,7 +142,6 @@ static struct option mirror_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char mirror_short_options[] = "hs:l:p:ub:" SOPT_QUIET SOPT_VERBOSE;
 static char mirror_help_text[] =
 	"Usage: flexnbd " CMD_MIRROR " <options>\n\n"
@@ -143,7 +151,9 @@ static char mirror_help_text[] =
 	"\t--" OPT_PORT ",-p <PORT>\tThe port to mirror to.\n"
 	SOCK_LINE
 	"\t--" OPT_UNLINK ",-u\tUnlink the local file when done.\n"
-    BIND_LINE VERBOSE_LINE QUIET_LINE;
+	BIND_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 static struct option break_options[] = {
 	GETOPT_HELP,
@@ -152,12 +162,14 @@ static struct option break_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char break_short_options[] = "hs:" SOPT_QUIET SOPT_VERBOSE;
 static char break_help_text[] =
 	"Usage: flexnbd " CMD_BREAK " <options>\n\n"
 	"Stop mirroring from the server with control socket SOCK.\n\n"
-    HELP_LINE SOCK_LINE VERBOSE_LINE QUIET_LINE;
+	HELP_LINE
+	SOCK_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 
 static struct option status_options[] = {
@@ -167,12 +179,14 @@ static struct option status_options[] = {
 	GETOPT_VERBOSE,
 	{0}
 };
-
 static char status_short_options[] = "hs:" SOPT_QUIET SOPT_VERBOSE;
 static char status_help_text[] =
 	"Usage: flexnbd " CMD_STATUS " <options>\n\n"
 	"Get the status for a server with control socket SOCK.\n\n"
-    HELP_LINE SOCK_LINE VERBOSE_LINE QUIET_LINE;
+	HELP_LINE
+	SOCK_LINE
+	VERBOSE_LINE
+	QUIET_LINE;
 
 char help_help_text_arr[] =
 	"Usage: flexnbd <cmd> [cmd options]\n\n"
@@ -186,7 +200,8 @@ char help_help_text_arr[] =
 	"\tflexnbd mirror-speed\n"
 	"\tflexnbd break\n"
 	"\tflexnbd status\n"
-    "\tflexnbd help\n\n" "See flexnbd help <cmd> for further info\n";
+	"\tflexnbd help\n\n"
+	"See flexnbd help <cmd> for further info\n";
 /* Slightly odd array/pointer pair to stop the compiler from complaining
  * about symbol sizes
  */
@@ -199,8 +214,7 @@ void do_write(struct mode_readwrite_params *params);
 void do_remote_command(char* command, char* mode, int argc, char** argv);
 
 
-void read_serve_param(int c, char **ip_addr, char **ip_port, char **file,
-		      char **sock, int *default_deny, int *use_killswitch)
+void read_serve_param( int c, char **ip_addr, char **ip_port, char **file, char **sock, int *default_deny, int *use_killswitch )
 {
 	switch(c){
 		case 'h':
@@ -240,7 +254,9 @@ void read_serve_param(int c, char **ip_addr, char **ip_port, char **file,
 void read_listen_param( int c,
 		char **ip_addr,
 		char **ip_port,
-		       char **file, char **sock, int *default_deny)
+		char **file,
+		char **sock,
+		int *default_deny )
 {
 	switch(c){
 		case 'h':
@@ -273,9 +289,7 @@ void read_listen_param(int c,
 	}
 }
 
-void read_readwrite_param(int c, char **ip_addr, char **ip_port,
-			  char **bind_addr, char **from, char **size,
-			  char *err_text)
+void read_readwrite_param( int c, char **ip_addr, char **ip_port, char **bind_addr, char **from, char **size, char *err_text )
 {
 	switch(c){
 		case 'h':
@@ -334,7 +348,11 @@ void read_acl_param(int c, char **sock)
 	read_sock_param( c, sock, acl_help_text );
 }
 
-void read_mirror_speed_param(int c, char **sock, char **max_speed)
+void read_mirror_speed_param(
+		int c,
+		char **sock,
+		char **max_speed
+)
 {
 	switch( c ) {
 		case 'h':
@@ -359,10 +377,13 @@ void read_mirror_speed_param(int c, char **sock, char **max_speed)
 	}
 }
 
-void read_mirror_param(int c,
+void read_mirror_param(
+		int c,
 		char **sock,
 		char **ip_addr,
-		       char **ip_port, int *unlink, char **bind_addr)
+		char **ip_port,
+		int  *unlink,
+		char **bind_addr )
 {
 	switch( c ){
 		case 'h':
@@ -438,14 +459,10 @@ int mode_serve(int argc, char *argv[])
 	struct flexnbd * flexnbd;
 
 	while (1) {
-	c = getopt_long(argc, argv, serve_short_options, serve_options,
-			NULL);
-	if (c == -1) {
-	    break;
-	}
+		c = getopt_long(argc, argv, serve_short_options, serve_options, NULL);
+		if ( c == -1 ) { break; }
 
-	read_serve_param(c, &ip_addr, &ip_port, &file, &sock,
-			 &default_deny, &use_killswitch);
+		read_serve_param( c, &ip_addr, &ip_port, &file, &sock, &default_deny, &use_killswitch );
 	}
 
 	if ( NULL == ip_addr || NULL == ip_port ) {
@@ -456,14 +473,9 @@ int mode_serve(int argc, char *argv[])
 		err = 1;
 		fprintf( stderr, "--file is required\n" );
 	}
-    if (err) {
-	exit_err(serve_help_text);
-    }
+	if ( err ) { exit_err( serve_help_text ); }
 
-    flexnbd =
-	flexnbd_create_serving(ip_addr, ip_port, file, sock, default_deny,
-			       argc - optind, argv + optind,
-			       MAX_NBD_CLIENTS, use_killswitch);
+	flexnbd = flexnbd_create_serving( ip_addr, ip_port, file, sock, default_deny, argc - optind, argv + optind, MAX_NBD_CLIENTS, use_killswitch );
 	info( "Serving file %s", file );
 	success = flexnbd_serve( flexnbd );
 	flexnbd_destroy( flexnbd );
@@ -487,11 +499,8 @@ int mode_listen(int argc, char *argv[])
 	struct flexnbd * flexnbd;
 
 	while (1) {
-	c = getopt_long(argc, argv, listen_short_options, listen_options,
-			NULL);
-	if (c == -1) {
-	    break;
-	}
+		c = getopt_long(argc, argv, listen_short_options, listen_options, NULL);
+		if ( c == -1 ) { break; }
 
 		read_listen_param( c, &ip_addr, &ip_port,
 				&file, &sock, &default_deny );
@@ -505,16 +514,16 @@ int mode_listen(int argc, char *argv[])
 		err = 1;
 		fprintf( stderr, "--file is required\n" );
 	}
-    if (err) {
-	exit_err(listen_help_text);
-    }
+	if ( err ) { exit_err( listen_help_text ); }
 
-    flexnbd = flexnbd_create_listening(ip_addr,
+	flexnbd = flexnbd_create_listening(
+		ip_addr,
 		ip_port,
 		file,
 		sock,
 		default_deny,
-				       argc - optind, argv + optind);
+		argc - optind,
+		argv + optind);
 	success = flexnbd_serve( flexnbd );
 	flexnbd_destroy( flexnbd );
 
@@ -536,25 +545,29 @@ int mode_listen(int argc, char *argv[])
  *		 char *s_length,
  *		 char *s_filename )
  */
-void params_readwrite(int write_not_read,
+void params_readwrite(
+	int write_not_read,
 	struct mode_readwrite_params* out,
 	char* s_ip_address,
 	char* s_port,
 	char* s_bind_address,
-		      char *s_from, char *s_length_or_filename)
+	char* s_from,
+	char* s_length_or_filename
+)
 {
 	FATAL_IF_NULL(s_ip_address, "No IP address supplied");
 	FATAL_IF_NULL(s_port, "No port number supplied");
 	FATAL_IF_NULL(s_from, "No from supplied");
 	FATAL_IF_NULL(s_length_or_filename, "No length supplied");
 
-    FATAL_IF_ZERO(parse_ip_to_sockaddr
-		  (&out->connect_to.generic, s_ip_address),
-		  "Couldn't parse connection address '%s'", s_ip_address);
+	FATAL_IF_ZERO(
+		parse_ip_to_sockaddr(&out->connect_to.generic, s_ip_address),
+		"Couldn't parse connection address '%s'",
+		s_ip_address
+	);
 
 	if (s_bind_address != NULL &&
-	parse_ip_to_sockaddr(&out->connect_from.generic,
-			     s_bind_address) == 0) {
+			parse_ip_to_sockaddr(&out->connect_from.generic, s_bind_address) == 0) {
 		fatal("Couldn't parse bind address '%s'", s_bind_address);
 	}
 
@@ -562,27 +575,30 @@ void params_readwrite(int write_not_read,
 
 	long signed_from = atol(s_from);
 	FATAL_IF_NEGATIVE( signed_from,
-		      "Can't read from a negative offset %d.",
-		      signed_from);
+			"Can't read from a negative offset %d.", signed_from);
 	out->from  = signed_from;
 
 	if (write_not_read) {
 		if (s_length_or_filename[0]-48 < 10) {
 			out->len   = atol(s_length_or_filename);
 			out->data_fd = 0;
-	} else {
-	    out->data_fd = open(s_length_or_filename, O_RDONLY);
+		}
+		else {
+			out->data_fd = open(
+			  s_length_or_filename, O_RDONLY);
 			FATAL_IF_NEGATIVE(out->data_fd,
 			  "Couldn't open %s", s_length_or_filename);
 			off64_t signed_len = lseek64(out->data_fd, 0, SEEK_END);
 			FATAL_IF_NEGATIVE(signed_len,
-			      "Couldn't find length of %s",
-			      s_length_or_filename);
+			  "Couldn't find length of %s", s_length_or_filename);
 			out->len = signed_len;
-	    FATAL_IF_NEGATIVE(lseek64(out->data_fd, 0, SEEK_SET),
-			      "Couldn't rewind %s", s_length_or_filename);
+			FATAL_IF_NEGATIVE(
+				lseek64(out->data_fd, 0, SEEK_SET),
+				"Couldn't rewind %s", s_length_or_filename
+			);
 		}
-    } else {
+	}
+	else {
 		out->len = atol(s_length_or_filename);
 		out->data_fd = 1;
 	}
@@ -602,15 +618,11 @@ int mode_read(int argc, char *argv[])
 	struct mode_readwrite_params readwrite;
 
 	while (1){
-	c = getopt_long(argc, argv, read_short_options, read_options,
-			NULL);
+		c = getopt_long(argc, argv, read_short_options, read_options, NULL);
 
-	if (c == -1) {
-	    break;
-	}
+		if ( c == -1 ) { break; }
 
-	read_readwrite_param(c, &ip_addr, &ip_port, &bind_addr, &from,
-			     &size, read_help_text);
+		read_readwrite_param( c, &ip_addr, &ip_port, &bind_addr, &from, &size, read_help_text );
 	}
 
 	if ( NULL == ip_addr || NULL == ip_port ) {
@@ -621,13 +633,10 @@ int mode_read(int argc, char *argv[])
 		err = 1;
 		fprintf( stderr, "both --from and --size are required.\n" );
 	}
-    if (err) {
-	exit_err(read_help_text);
-    }
+	if ( err ) { exit_err( read_help_text ); }
 
 	memset( &readwrite, 0, sizeof( readwrite ) );
-    params_readwrite(0, &readwrite, ip_addr, ip_port, bind_addr, from,
-		     size);
+	params_readwrite( 0, &readwrite, ip_addr, ip_port, bind_addr, from, size );
 	do_read( &readwrite );
 	return 0;
 }
@@ -645,14 +654,10 @@ int mode_write(int argc, char *argv[])
 	struct mode_readwrite_params readwrite;
 
 	while (1){
-	c = getopt_long(argc, argv, write_short_options, write_options,
-			NULL);
-	if (c == -1) {
-	    break;
-	}
+		c = getopt_long(argc, argv, write_short_options, write_options, NULL);
+		if ( c == -1 ) { break; }
 
-	read_readwrite_param(c, &ip_addr, &ip_port, &bind_addr, &from,
-			     &size, write_help_text);
+		read_readwrite_param( c, &ip_addr, &ip_port, &bind_addr, &from, &size, write_help_text );
 	}
 
 	if ( NULL == ip_addr || NULL == ip_port ) {
@@ -663,13 +668,10 @@ int mode_write(int argc, char *argv[])
 		err = 1;
 		fprintf( stderr, "both --from and --size are required.\n" );
 	}
-    if (err) {
-	exit_err(write_help_text);
-    }
+	if ( err ) { exit_err( write_help_text ); }
 
 	memset( &readwrite, 0, sizeof( readwrite ) );
-    params_readwrite(1, &readwrite, ip_addr, ip_port, bind_addr, from,
-		     size);
+	params_readwrite( 1, &readwrite, ip_addr, ip_port, bind_addr, from, size );
 	do_write( &readwrite );
 	return 0;
 }
@@ -681,9 +683,7 @@ int mode_acl(int argc, char *argv[])
 
 	while (1) {
 		c = getopt_long( argc, argv, acl_short_options, acl_options, NULL );
-	if (c == -1) {
-	    break;
-	}
+		if ( c == -1 ) { break; }
 		read_acl_param( c, &sock );
 	}
 
@@ -708,11 +708,8 @@ int mode_mirror_speed(int argc, char *argv[])
 	char *speed = NULL;
 
 	while( 1 ) {
-	c = getopt_long(argc, argv, mirror_speed_short_options,
-			mirror_speed_options, NULL);
-	if (-1 == c) {
-	    break;
-	}
+		c = getopt_long( argc, argv, mirror_speed_short_options, mirror_speed_options, NULL );
+		if ( -1 == c ) { break; }
 		read_mirror_speed_param( c, &sock, &speed );
 	}
 
@@ -742,15 +739,14 @@ int mode_mirror(int argc, char *argv[])
 	remote_argv[2] = "exit";
 
 	while (1) {
-	c = getopt_long(argc, argv, mirror_short_options, mirror_options,
-			NULL);
-	if (-1 == c) {
-	    break;
-	}
+		c = getopt_long( argc, argv, mirror_short_options, mirror_options, NULL);
+		if ( -1 == c ) { break; }
 		read_mirror_param( c,
 				&sock,
 				&remote_argv[0],
-			  &remote_argv[1], &unlink, &remote_argv[3]);
+				&remote_argv[1],
+				&unlink,
+				&remote_argv[3] );
 	}
 
 	if ( NULL == sock ){
@@ -761,16 +757,13 @@ int mode_mirror(int argc, char *argv[])
 		fprintf( stderr, "both --addr and --port are required.\n");
 		err = 1;
 	}
-    if (err) {
-	exit_err(mirror_help_text);
-    }
-    if (unlink) {
-	remote_argv[2] = "unlink";
-    }
+	if ( err ) { exit_err( mirror_help_text ); }
+	if ( unlink ) { remote_argv[2] = "unlink"; }
 
 	if (remote_argv[3] == NULL) {
 		do_remote_command( "mirror", sock, 3, remote_argv );
-    } else {
+	}
+	else {
 		do_remote_command( "mirror", sock, 4, remote_argv );
 	}
 
@@ -784,11 +777,8 @@ int mode_break(int argc, char *argv[])
 	char *sock = NULL;
 
 	while (1) {
-	c = getopt_long(argc, argv, break_short_options, break_options,
-			NULL);
-	if (-1 == c) {
-	    break;
-	}
+		c = getopt_long( argc, argv, break_short_options, break_options, NULL );
+		if ( -1 == c ) { break; }
 		read_break_param( c, &sock );
 	}
 
@@ -808,11 +798,8 @@ int mode_status(int argc, char *argv[])
 	char *sock = NULL;
 
 	while (1) {
-	c = getopt_long(argc, argv, status_short_options, status_options,
-			NULL);
-	if (-1 == c) {
-	    break;
-	}
+		c = getopt_long( argc, argv, status_short_options, status_options, NULL );
+		if ( -1 == c ) { break; }
 		read_status_param( c, &sock );
 	}
 
@@ -849,9 +836,7 @@ int mode_help(int argc, char *argv[])
 			help_text = mirror_help_text;
 		} else if ( IS_CMD( CMD_STATUS, cmd ) ) {
 			help_text = status_help_text;
-	} else {
-	    exit_err(help_help_text);
-	}
+		} else { exit_err( help_help_text ); }
 	}
 
 	fprintf( stdout, "%s\n", help_text );
@@ -863,27 +848,37 @@ void mode(char *mode, int argc, char **argv)
 {
 	if ( IS_CMD( CMD_SERVE, mode ) ) {
 		exit( mode_serve( argc, argv ) );
-    } else if (IS_CMD(CMD_LISTEN, mode)) {
+	}
+	else if ( IS_CMD( CMD_LISTEN, mode ) ) {
 		exit( mode_listen( argc, argv ) );
-    } else if (IS_CMD(CMD_READ, mode)) {
+	}
+	else if ( IS_CMD( CMD_READ, mode ) ) {
 		mode_read( argc, argv );
-    } else if (IS_CMD(CMD_WRITE, mode)) {
+	}
+	else if ( IS_CMD( CMD_WRITE, mode ) ) {
 		mode_write( argc, argv );
-    } else if (IS_CMD(CMD_ACL, mode)) {
+	}
+	else if ( IS_CMD( CMD_ACL, mode ) ) {
 		mode_acl( argc, argv );
 	} else if ( IS_CMD ( CMD_MIRROR_SPEED, mode ) ) {
 		mode_mirror_speed( argc, argv );
-    } else if (IS_CMD(CMD_MIRROR, mode)) {
+	}
+	else if ( IS_CMD( CMD_MIRROR, mode ) ) {
 		mode_mirror( argc, argv );
-    } else if (IS_CMD(CMD_BREAK, mode)) {
+	}
+       	else if ( IS_CMD( CMD_BREAK, mode ) ) {
 		mode_break( argc, argv );
-    } else if (IS_CMD(CMD_STATUS, mode)) {
+	}
+       	else if ( IS_CMD( CMD_STATUS, mode ) ) {
 		mode_status( argc, argv );
-    } else if (IS_CMD(CMD_HELP, mode)) {
+	}
+	else if ( IS_CMD( CMD_HELP, mode ) ) {
 		mode_help( argc-1, argv+1 );
-    } else {
+	}
+	else {
 		mode_help( argc-1, argv+1 );
 		exit( 1 );
 	}
 	exit(0);
 }
+

src/server/serve.c

@@ -21,7 +21,8 @@
 #include <sys/socket.h>
 #include <netinet/tcp.h>
 
-struct server *server_create(struct flexnbd *flexnbd,
+struct server * server_create (
+	struct flexnbd * flexnbd,
 	char* s_ip_address,
 	char* s_port,
 	char* s_file,
@@ -29,7 +30,8 @@ struct server *server_create(struct flexnbd *flexnbd,
 	int acl_entries,
 	char** s_acl_entries,
 	int max_nbd_clients,
-			     int use_killswitch, int success)
+	int use_killswitch,
+	int success)
 {
 	NULLCHECK( flexnbd );
 	struct server * out;
@@ -41,18 +43,19 @@ struct server *server_create(struct flexnbd *flexnbd,
 
 	server_allow_new_clients( out );
 
-    out->nbd_client =
-	xmalloc(max_nbd_clients * sizeof(struct client_tbl_entry));
+	out->nbd_client = xmalloc( max_nbd_clients * sizeof( struct client_tbl_entry ) );
 	out->tcp_backlog = 10; /* does this need to be settable? */
 
 	FATAL_IF_NULL(s_ip_address, "No IP address supplied");
 	FATAL_IF_NULL(s_port, "No port number supplied");
 	FATAL_IF_NULL(s_file, "No filename supplied");
 	NULLCHECK( s_ip_address );
-    FATAL_IF_ZERO(parse_ip_to_sockaddr
-		  (&out->bind_to.generic, s_ip_address),
+	FATAL_IF_ZERO(
+		parse_ip_to_sockaddr(&out->bind_to.generic, s_ip_address),
 		"Couldn't parse server address '%s' (use 0 if "
-		  "you want to bind to all IPs)", s_ip_address);
+		"you want to bind to all IPs)",
+		s_ip_address
+	);
 
 
 	out->acl = acl_create( acl_entries, s_acl_entries, default_deny );
@@ -107,7 +110,8 @@ void server_unlink(struct server *serve)
 
 	FATAL_IF_NEGATIVE( unlink( serve->filename ),
 			"Failed to unlink %s: %s",
-		      serve->filename, strerror(errno));
+			serve->filename,
+			strerror( errno ) );
 
 }
 
@@ -151,8 +155,7 @@ void server_unlock_start_mirror(struct server *serve)
 {
 	debug("Mirror start unlocking");
 
-    SERVER_UNLOCK(serve, l_start_mirror,
-		  "Problem with start mirror unlock");
+	SERVER_UNLOCK( serve, l_start_mirror, "Problem with start mirror unlock" );
 }
 
 int server_start_mirror_locked( struct server * serve )
@@ -183,9 +186,8 @@ void serve_open_server_socket(struct server *params)
 {
 	NULLCHECK( params );
 
-    params->server_fd =
-	socket(params->bind_to.generic.sa_family ==
-	       AF_INET ? PF_INET : PF_INET6, SOCK_STREAM, 0);
+	params->server_fd = socket(params->bind_to.generic.sa_family == AF_INET ?
+	  PF_INET : PF_INET6, SOCK_STREAM, 0);
 
 	FATAL_IF_NEGATIVE( params->server_fd, "Couldn't create server socket" );
 
@@ -197,32 +199,35 @@ void serve_open_server_socket(struct server *params)
 	 * problem.  It's also indicative of something odd going on, so
 	 * we barf.
 	 */
-    FATAL_IF_NEGATIVE(sock_set_reuseaddr(params->server_fd, 1),
-		      "Couldn't set SO_REUSEADDR");
+	FATAL_IF_NEGATIVE(
+		sock_set_reuseaddr( params->server_fd, 1 ), "Couldn't set SO_REUSEADDR"
+	);
 
 	/* TCP_NODELAY makes everything not be slow.  If we can't set
 	 * this, again, there's something odd going on which we don't
 	 * understand.
 	 */
-    FATAL_IF_NEGATIVE(sock_set_tcp_nodelay(params->server_fd, 1),
-		      "Couldn't set TCP_NODELAY");
+	FATAL_IF_NEGATIVE(
+		sock_set_tcp_nodelay( params->server_fd, 1 ), "Couldn't set TCP_NODELAY"
+	);
 
 	/* If we can't bind, presumably that's because someone else is
 	 * squatting on our ip/port combo, or the ip isn't yet
 	 * configured. Ideally we want to retry this. */
-    FATAL_UNLESS_ZERO(sock_try_bind
-		      (params->server_fd, &params->bind_to.generic),
+	FATAL_UNLESS_ZERO(
+		sock_try_bind( params->server_fd, &params->bind_to.generic ),
 		SHOW_ERRNO( "Failed to bind() socket" )
 	);
 
-    FATAL_IF_NEGATIVE(listen(params->server_fd, params->tcp_backlog),
-		      "Couldn't listen on server socket");
+	FATAL_IF_NEGATIVE(
+		listen(params->server_fd, params->tcp_backlog),
+		"Couldn't listen on server socket"
+	);
 }
 
 
 
-int tryjoin_client_thread(struct client_tbl_entry *entry,
-			  int (*joinfunc) (pthread_t, void **))
+int tryjoin_client_thread( struct client_tbl_entry *entry, int (*joinfunc)(pthread_t, void **) )
 {
 
 	NULLCHECK( entry );
@@ -234,25 +239,25 @@ int tryjoin_client_thread(struct client_tbl_entry *entry,
 	if (entry->thread != 0) {
 		char s_client_address[128];
 
-	sockaddr_address_string(&entry->address.generic,
-				&s_client_address[0], 128);
+		sockaddr_address_string( &entry->address.generic, &s_client_address[0], 128 );
 
-	debug("%s(%p,...)",
-	      joinfunc == pthread_join ? "joining" : "tryjoining",
-	      entry->thread);
+		debug( "%s(%p,...)", joinfunc == pthread_join ? "joining" : "tryjoining", entry->thread );
 		int join_errno = joinfunc(entry->thread, &status);
 
 		/* join_errno can legitimately be ESRCH if the thread is
 		 * already dead, but the client still needs tidying up. */
 		if (join_errno != 0 && !entry->client->stopped ) {
-	    debug("join_errno was %s, stopped was %d",
-		  strerror(join_errno), entry->client->stopped);
+			debug( "join_errno was %s, stopped was %d", strerror( join_errno ), entry->client->stopped );
 			FATAL_UNLESS( join_errno == EBUSY,
 					"Problem with joining thread %p: %s",
-			 entry->thread, strerror(join_errno));
-	} else if (join_errno == 0) {
+					entry->thread,
+					strerror(join_errno) );
+		}
+		else if ( join_errno == 0 ) {
 			debug("nbd thread %016x exited (%s) with status %ld",
-		  entry->thread, s_client_address, (uintptr_t) status);
+					entry->thread,
+					s_client_address,
+					(uintptr_t)status);
 			client_destroy( entry->client );
 			entry->client = NULL;
 			entry->thread = 0;
@@ -282,8 +287,7 @@ int cleanup_client_thread(struct client_tbl_entry *entry)
 	return tryjoin_client_thread( entry, pthread_tryjoin_np );
 }
 
-void cleanup_client_threads(struct client_tbl_entry *entries,
-			    size_t entries_len)
+void cleanup_client_threads( struct client_tbl_entry * entries, size_t entries_len )
 {
 	size_t i;
 	for( i = 0; i < entries_len; i++ ) {
@@ -329,8 +333,6 @@ int server_count_clients(struct server *params)
 	NULLCHECK( params );
 	int i, count = 0;
 
-    cleanup_client_threads(params->nbd_client, params->max_nbd_clients);
-
 	for ( i = 0 ; i < params->max_nbd_clients ; i++ ) {
 		if ( params->nbd_client[i].thread != 0 ) {
 			count++;
@@ -345,8 +347,7 @@ int server_count_clients(struct server *params)
  * to the current acl.  If params->acl is NULL, the result will be 1,
  * otherwise it will be the result of acl_includes().
  */
-int server_acl_accepts(struct server *params,
-		       union mysockaddr *client_address)
+int server_acl_accepts( struct server *params, union mysockaddr * client_address )
 {
 	NULLCHECK( params );
 	NULLCHECK( client_address );
@@ -365,7 +366,8 @@ int server_acl_accepts(struct server *params,
 }
 
 
-int server_should_accept_client(struct server *params,
+int server_should_accept_client(
+		struct server * params,
 		union mysockaddr * client_address,
 		char *s_client_address,
 		size_t s_client_address_len )
@@ -374,9 +376,9 @@ int server_should_accept_client(struct server *params,
 	NULLCHECK( client_address );
 	NULLCHECK( s_client_address );
 
-    const char *result =
-	sockaddr_address_string(&client_address->generic, s_client_address,
-				s_client_address_len);
+	const char* result = sockaddr_address_string(
+		&client_address->generic, s_client_address, s_client_address_len
+	);
 
 	if ( NULL == result ) {
 		warn( "Rejecting client %s: Bad client_address", s_client_address );
@@ -384,8 +386,7 @@ int server_should_accept_client(struct server *params,
 	}
 
 	if ( !server_acl_accepts( params, client_address ) ) {
-	warn("Rejecting client %s: Access control error",
-	     s_client_address);
+		warn( "Rejecting client %s: Access control error", s_client_address );
 		debug( "We %s have an acl, and default_deny is %s",
 				(params->acl ? "do" : "do not"),
 				(params->acl->default_deny ? "true" : "false") );
@@ -397,11 +398,11 @@ int server_should_accept_client(struct server *params,
 
 
 
-int spawn_client_thread(struct client *client_params,
+int spawn_client_thread(
+	struct client * client_params,
 	pthread_t *out_thread)
 {
-    int result =
-	pthread_create(out_thread, NULL, client_serve, client_params);
+	int result = pthread_create(out_thread, NULL, client_serve, client_params);
 
 	return result;
 }
@@ -411,8 +412,10 @@ int spawn_client_thread(struct client *client_params,
   * to handle it.  Rejects the connection if there is an ACL, and the far end's
   * address doesn't match, or if there are too many clients already connected.
   */
-void accept_nbd_client(struct server *params,
-		       int client_fd, union mysockaddr *client_address)
+void accept_nbd_client(
+		struct server* params,
+		int client_fd,
+		union mysockaddr* client_address)
 {
 	NULLCHECK(params);
 	NULLCHECK(client_address);
@@ -421,15 +424,11 @@ void accept_nbd_client(struct server *params,
 	int slot;
 	char s_client_address[64] = {0};
 
-    FATAL_IF_NEGATIVE(sock_set_keepalive_params
-		      (client_fd, CLIENT_KEEPALIVE_TIME,
-		       CLIENT_KEEPALIVE_INTVL, CLIENT_KEEPALIVE_PROBES),
-		      "Error setting keepalive parameters on client socket fd %d",
-		      client_fd);
+	FATAL_IF_NEGATIVE( sock_set_keepalive_params( client_fd, CLIENT_KEEPALIVE_TIME, CLIENT_KEEPALIVE_INTVL, CLIENT_KEEPALIVE_PROBES),
+		"Error setting keepalive parameters on client socket fd %d", client_fd );
 
 
-    if (!server_should_accept_client
-	(params, client_address, s_client_address, 64)) {
+	if ( !server_should_accept_client( params, client_address, s_client_address, 64 ) ) {
 		FATAL_IF_NEGATIVE( close( client_fd ),
 			"Error closing client socket fd %d", client_fd );
 		debug("Closed client socket fd %d", client_fd);
@@ -463,8 +462,7 @@ void accept_nbd_client(struct server *params,
 		return;
 	}
 
-    debug("nbd thread %p started (%s)", params->nbd_client[slot].thread,
-	  s_client_address);
+	debug("nbd thread %p started (%s)", params->nbd_client[slot].thread, s_client_address);
 }
 
 
@@ -485,12 +483,8 @@ void server_audit_clients(struct server *serve)
 	 */
 	for( i = 0; i < serve->max_nbd_clients; i++ ) {
 		entry = &serve->nbd_client[i];
-	if (0 == entry->thread) {
-	    continue;
-	}
-	if (server_acl_accepts(serve, &entry->address)) {
-	    continue;
-	}
+		if ( 0 == entry->thread ) { continue; }
+		if ( server_acl_accepts( serve, &entry->address ) ) { continue; }
 		client_signal_stop( entry->client );
 	}
 }
@@ -550,9 +544,7 @@ void server_replace_acl(struct server *serve, struct acl *new_acl)
 		struct acl * old_acl = serve->acl;
 		serve->acl = new_acl;
 		/* We should always have an old_acl, but just in case... */
-	if (old_acl) {
-	    acl_destroy(old_acl);
-	}
+		if ( old_acl ) { acl_destroy( old_acl ); }
 	}
 	server_unlock_acl( serve );
 
@@ -620,13 +612,12 @@ int server_accept(struct server *params)
 
 	FD_ZERO(&fds);
 	FD_SET(params->server_fd, &fds);
-    if (0 < signal_fd) {
-	FD_SET(signal_fd, &fds);
-    }
+	if( 0 <  signal_fd ) { FD_SET(signal_fd, &fds); }
 	self_pipe_fd_set( params->close_signal, &fds );
 	self_pipe_fd_set( params->acl_updated_signal, &fds );
 
-    FATAL_IF_NEGATIVE(sock_try_select(FD_SETSIZE, &fds, NULL, NULL, NULL),
+	FATAL_IF_NEGATIVE(
+		sock_try_select(FD_SETSIZE, &fds, NULL, NULL, NULL),
 		SHOW_ERRNO( "select() failed" )
 	);
 
@@ -639,8 +630,7 @@ int server_accept(struct server *params)
 	if ( 0 < signal_fd && FD_ISSET( signal_fd, &fds ) ){
 		debug( "Stop signal received." );
 		server_close_clients( params );
-	params->success = params->success
-	    && serve_shutdown_is_graceful(params);
+		params->success = params->success && serve_shutdown_is_graceful( params );
 		should_continue = 0;
 	}
 
@@ -651,8 +641,7 @@ int server_accept(struct server *params)
 	}
 
 	if ( FD_ISSET( params->server_fd, &fds ) ){
-	int client_fd =
-	    accept(params->server_fd, &client_address.generic, &socklen);
+		int client_fd = accept( params->server_fd, &client_address.generic, &socklen );
 
 		if ( params->allow_new_clients ) {
 			debug("Accepted nbd client socket fd %d", client_fd);
@@ -687,7 +676,8 @@ void *build_allocation_map_thread(void *serve_uncast)
 
 	if ( build_allocation_map( serve->allocation_map, fd ) ) {
 		serve->allocation_map_built = 1;
-    } else {
+	}
+	else {
 		/* We can operate without it, but we can't free it without a race.
 		 * All that happens if we leave it is that it gradually builds up an
 		 * *incomplete* record of writes. Nobody will use it, as
@@ -720,17 +710,9 @@ void serve_init_allocation_map(struct server *params)
 
 	FATAL_IF_NEGATIVE(fd, "Couldn't open %s", params->filename );
 	size = lseek64( fd, 0, SEEK_END );
-
-    /* If discs are not in multiples of 512, then odd things happen,
-     * resulting in reads/writes past the ends of files.
-     */
-    if (size != (size & ~0x1ff)) {
-	warn("file does not fit into 512-byte sectors; the end of the file will be ignored.");
-	size &= ~0x1ff;
-    }
-
 	params->size = size;
-    FATAL_IF_NEGATIVE(size, "Couldn't find size of %s", params->filename);
+	FATAL_IF_NEGATIVE( size, "Couldn't find size of %s",
+			   params->filename );
 
 	params->allocation_map =
 		bitset_alloc( params->size, block_allocation_resolution );
@@ -756,8 +738,7 @@ void server_allow_new_clients(struct server *serve)
 	return;
 }
 
-void server_join_clients(struct server *serve)
-{
+void server_join_clients( struct server * serve ) {
 	int i;
 	void* status;
 
@@ -770,8 +751,7 @@ void server_join_clients(struct server *serve)
 			if ( 0 == err ) {
 				serve->nbd_client[i].thread = 0;
 			} else {
-		warn("Error %s (%i) joining thread %p", strerror(err), err,
-		     thread_id);
+				warn( "Error %s (%i) joining thread %p", strerror( err ), err, thread_id );
 			}
 		}
 	}
@@ -823,9 +803,7 @@ void serve_cleanup(struct server *params,
 
 	info("cleaning up");
 
-    if (params->server_fd) {
-	close(params->server_fd);
-    }
+	if (params->server_fd){ close(params->server_fd); }
 
 	/* need to stop background build if we're killed very early on */
 	pthread_cancel(params->allocation_map_builder_thread);
@@ -834,18 +812,14 @@ void serve_cleanup(struct server *params,
 	int need_mirror_lock;
 	need_mirror_lock = !server_start_mirror_locked( params );
 
-    if (need_mirror_lock) {
-	server_lock_start_mirror(params);
-    }
+	if ( need_mirror_lock ) { server_lock_start_mirror( params ); }
 	{
 		if ( server_is_mirroring( params ) ) {
 			server_abandon_mirror( params );
 		}
 		server_prevent_mirror_start( params );
 	}
-    if (need_mirror_lock) {
-	server_unlock_start_mirror(params);
-    }
+	if ( need_mirror_lock ) { server_unlock_start_mirror( params ); }
 
 	server_join_clients( params );
 
@@ -890,11 +864,8 @@ uint64_t server_mirror_bytes_remaining(struct server * serve)
 {
 	if ( server_is_mirroring( serve ) ) {
 		uint64_t bytes_to_xfer =
-	    bitset_stream_queued_bytes(serve->allocation_map,
-				       BITSET_STREAM_SET) + (serve->size -
-							     serve->
-							     mirror->
-							     offset);
+			bitset_stream_queued_bytes( serve->allocation_map, BITSET_STREAM_SET ) +
+			( serve->size - serve->mirror->offset );
 
 		return bytes_to_xfer;
 	}
@@ -940,8 +911,10 @@ void server_abandon_mirror(struct server *serve)
 		 * We can set abandon_signal after mirror_super has checked it, but
 		 * before the reset. However, mirror_reset doesn't clear abandon_signal
 		 * so it'll just terminate early on the next pass. */
-	ERROR_UNLESS(self_pipe_signal(serve->mirror->abandon_signal),
-		     "Failed to signal abandon to mirror");
+		ERROR_UNLESS(
+			self_pipe_signal( serve->mirror->abandon_signal ),
+			"Failed to signal abandon to mirror"
+		);
 
 		pthread_t tid = serve->mirror_super->thread;
 		pthread_join( tid, NULL );
@@ -975,9 +948,7 @@ int do_serve(struct server *params, struct self_pipe *open_signal)
 
 	/* Only signal that we are open for business once the server
 	   socket is open */
-    if (NULL != open_signal) {
-	self_pipe_signal(open_signal);
-    }
+	if ( NULL != open_signal ) { self_pipe_signal( open_signal ); }
 
 	serve_init_allocation_map(params);
 	serve_accept_loop(params);

src/server/serve.h

@@ -103,7 +103,8 @@ struct server {
 	int success;
 };
 
-struct server *server_create(struct flexnbd *flexnbd,
+struct server * server_create(
+		struct flexnbd * flexnbd,
 		char* s_ip_address,
 		char* s_port,
 		char* s_file,
@@ -111,7 +112,8 @@ struct server *server_create(struct flexnbd *flexnbd,
 		int acl_entries,
 		char** s_acl_entries,
 		int max_nbd_clients,
-			     int use_killswitch, int success);
+		int use_killswitch,
+		int success );
 void server_destroy( struct server * );
 int server_is_closed(struct server* serve);
 void serve_signal_close( struct server *serve );
@@ -165,3 +167,4 @@ struct mode_readwrite_params {
 
 
 #endif
+

src/server/status.c

@@ -21,20 +21,17 @@ struct status *status_create(struct server *serve)
 	if ( status->is_mirroring ) {
 		status->migration_duration = monotonic_time_ms();
 
-	if ((serve->mirror->migration_started) <
-	    status->migration_duration) {
+		if ( ( serve->mirror->migration_started ) < status->migration_duration ) {
 			status->migration_duration -= serve->mirror->migration_started;
 		} else {
 			status->migration_duration = 0;
 		}
 		status->migration_duration /= 1000;
 		status->migration_speed = server_mirror_bps( serve );
-	status->migration_speed_limit =
-	    serve->mirror->max_bytes_per_second;
+		status->migration_speed_limit = serve->mirror->max_bytes_per_second;
 
 		status->migration_seconds_left = server_mirror_eta( serve );
-	status->migration_bytes_left =
-	    server_mirror_bytes_remaining(serve);
+		status->migration_bytes_left = server_mirror_bytes_remaining( serve );
 	}
 
 	server_unlock_start_mirror( serve );
@@ -80,3 +77,4 @@ void status_destroy(struct status *status)
 	NULLCHECK( status );
 	free( status );
 }
+

src/server/status.h

@@ -101,3 +101,4 @@ void status_destroy(struct status *);
 
 
 #endif
+

tests/acceptance/environment.rb

@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 require 'flexnbd'
 require 'file_writer'
 
@@ -7,23 +9,18 @@ class Environment
 
   def initialize
     @blocksize = 1024
-    @filename1 = "/tmp/.flexnbd.test.#{$PROCESS_ID}.#{Time.now.to_i}.1"
-    @filename2 = "/tmp/.flexnbd.test.#{$PROCESS_ID}.#{Time.now.to_i}.2"
-    @ip = '127.0.0.1'
-    @available_ports = [*40_000..41_000] - listening_ports
+    @filename1 = "/tmp/.flexnbd.test.#{$$}.#{Time.now.to_i}.1"
+    @filename2 = "/tmp/.flexnbd.test.#{$$}.#{Time.now.to_i}.2"
+    @ip = "127.0.0.1"
+    @available_ports = [*40000..41000] - listening_ports
     @port1 = @available_ports.shift
     @port2 = @available_ports.shift
-    @nbd1 = FlexNBD::FlexNBD.new('../../build/flexnbd', @ip, @port1)
-    @nbd2 = FlexNBD::FlexNBD.new('../../build/flexnbd', @ip, @port2)
+    @nbd1 = FlexNBD::FlexNBD.new("../../build/flexnbd", @ip, @port1)
+    @nbd2 = FlexNBD::FlexNBD.new("../../build/flexnbd", @ip, @port2)
 
     @fake_pid = nil
   end
 
-  def blocksize=(b)
-    raise RuntimeError, "Unable to change blocksize after files have been opened" if @file1 or @file2
-    @blocksize = b
-  end
-
   def prefetch_proxy!
     @nbd1.prefetch_proxy = true
     @nbd2.prefetch_proxy = true
@@ -32,11 +29,11 @@ class Environment
   def proxy1(port=@port2)
     @nbd1.proxy(@ip, port)
   end
-
   def proxy2(port=@port1)
     @nbd2.proxy(@ip, port)
   end
 
+
   def serve1(*acl)
     @nbd1.serve(@filename1, *acl)
   end
@@ -45,6 +42,7 @@ class Environment
     @nbd2.serve(@filename2, *acl)
   end
 
+
   def listen1( *acl )
     @nbd1.listen( @filename1, *(acl.empty? ? @acl1: acl) )
   end
@@ -53,6 +51,7 @@ class Environment
     @nbd2.listen( @filename2, *acl )
   end
 
+
   def break1
     @nbd1.break
   end
@@ -65,6 +64,7 @@ class Environment
     @nbd2.acl( *acl )
   end
 
+
   def status1
     @nbd1.status.first
   end
@@ -73,6 +73,8 @@ class Environment
     @nbd2.status.first
   end
 
+
+
   def mirror12
     @nbd1.mirror( @nbd2.ip, @nbd2.port )
   end
@@ -85,6 +87,7 @@ class Environment
     @nbd1.mirror_unlink( @nbd2.ip, @nbd2.port, 2 )
   end
 
+
   def write1( data )
     @nbd1.write( 0, data )
   end
@@ -97,17 +100,20 @@ class Environment
     @file2 = FileWriter.new(@filename2, @blocksize).write(data)
   end
 
+
   def truncate1( size )
     system "truncate -s #{size} #{@filename1}"
   end
 
+
   def listening_ports
-    `netstat -ltn`
-      .split("\n")
-      .map { |x| x.split(/\s+/) }[2..-1]
-      .map { |l| l[3].split(':')[-1].to_i }
+    `netstat -ltn`.
+      split("\n").
+      map { |x| x.split(/\s+/) }[2..-1].
+      map { |l| l[3].split(":")[-1].to_i }
   end
 
+
   def cleanup
     if @fake_pid
       begin
@@ -116,35 +122,41 @@ class Environment
       end
     end
 
+
     @nbd1.can_die(0)
     @nbd1.kill
     @nbd2.kill
 
     [@filename1, @filename2].each do |f|
-      File.unlink(f) if File.exist?(f)
+      File.unlink(f) if File.exists?(f)
     end
   end
 
+
   def run_fake( name, addr, port, sock=nil )
-    fakedir = File.join(File.dirname(__FILE__), 'fakes')
-    fakeglob = File.join(fakedir, name) + '*'
-    fake = Dir[fakeglob].sort.find do |fn|
+    fakedir = File.join( File.dirname( __FILE__ ), "fakes" )
+    fakeglob = File.join( fakedir, name ) + "*"
+    fake = Dir[fakeglob].sort.find { |fn|
       File.executable?( fn )
-    end
+    }
 
     raise "no fake executable at #{fakeglob}" unless fake
-    raise 'no addr' unless addr
-    raise 'no port' unless port
+    raise "no addr" unless addr
+    raise "no port" unless port
 
     @fake_pid = fork do
-      exec [fake, addr, port, @nbd1.pid, sock].map(&:to_s).join(' ')
+      exec [fake, addr, port, @nbd1.pid, sock].map{|x| x.to_s}.join(" ")
     end
     sleep(0.5)
   end
 
+
   def fake_reports_success
     _,status = Process.waitpid2( @fake_pid )
     @fake_pid = nil
     status.success?
   end
+
+
 end # class Environment
+

tests/acceptance/fakes/dest/break_after_hello.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # Open a server, accept a client, then cancel the migration by issuing
 # a break command.
 
@@ -11,22 +13,23 @@ client = server.accept
 
 ctrl = UNIXSocket.open( sock )
 
-Process.kill('STOP', src_pid.to_i)
+Process.kill("STOP", src_pid.to_i)
 ctrl.write( "break\n" )
 ctrl.close_write
 client.write_hello
-Process.kill('CONT', src_pid.to_i)
+Process.kill("CONT", src_pid.to_i)
 
-raise 'Unexpected control response' unless
+fail "Unexpected control response" unless
   ctrl.read =~ /0: mirror stopped/
 
 client2 = nil
 begin
-  client2 = server.accept('Expected timeout')
-  raise 'Unexpected reconnection'
+  client2 = server.accept( "Expected timeout" )
+  fail "Unexpected reconnection"
 rescue Timeout::Error
   # expected
 end
 client.close
 
 exit(0)
+

tests/acceptance/fakes/dest/close_after_entrust_reply.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # Receive a mirror, and disconnect after sending the entrust reply but
 # before it can send the disconnect signal.
 #
@@ -13,7 +15,7 @@ server = FakeDest.new(addr, port)
 client = server.accept
 
 client.write_hello
-while req = client.read_request; req[:type] == 1
+while (req = client.read_request; req[:type] == 1)
   client.read_data( req[:len] )
   client.write_reply( req[:handle] )
 end
@@ -24,10 +26,11 @@ client.close
 system "kill -CONT #{src_pid}"
 
 sleep( 0.25 )
-client2 = server.accept('Timed out waiting for a reconnection')
+client2 = server.accept( "Timed out waiting for a reconnection" )
 
 client2.close
 server.close
 
-warn 'done'
+$stderr.puts "done"
 exit(0)
+

tests/acceptance/fakes/dest/close_after_hello.rb

@@ -11,11 +11,11 @@ include FlexNBD
 
 addr, port = *ARGV
 server = FakeDest.new( addr, port )
-client = server.accept('Timed out waiting for a connection')
+client = server.accept( "Timed out waiting for a connection" )
 client.write_hello
 client.close
 
-new_client = server.accept('Timed out waiting for a reconnection')
+new_client = server.accept( "Timed out waiting for a reconnection" )
 new_client.close
 
 server.close

tests/acceptance/fakes/dest/close_after_write.rb

@@ -12,12 +12,12 @@ include FlexNBD
 
 addr, port = *ARGV
 server = FakeDest.new( addr, port )
-client = server.accept('Timed out waiting for a connection')
+client = server.accept( "Timed out waiting for a connection" )
 client.write_hello
 client.read_request
 client.close
 
-new_client = server.accept('Timed out waiting for a reconnection')
+new_client = server.accept( "Timed out waiting for a reconnection" )
 new_client.close
 
 server.close

tests/acceptance/fakes/dest/close_after_writes.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # Open a server, accept a client, then we expect a single write
 # followed by an entrust.  However, we disconnect after the write so
 # the entrust will fail.  We don't expect a reconnection: the sender
@@ -15,9 +17,9 @@ client.write_hello
 req = client.read_request
 data = client.read_data( req[:len] )
 
-Process.kill('STOP', src_pid.to_i)
+Process.kill("STOP", src_pid.to_i)
 client.write_reply( req[:handle], 0 )
 client.close
-Process.kill('CONT', src_pid.to_i)
+Process.kill("CONT", src_pid.to_i)
 
 exit(0)

tests/acceptance/fakes/dest/error_on_write.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 require 'flexnbd/fake_dest'
 include FlexNBD
 
@@ -10,7 +12,8 @@ client.write_hello
 handle = client.read_request[:handle]
 client.write_error( handle )
 
-client2 = server.accept('Timed out waiting for a reconnection')
+
+client2 = server.accept( "Timed out waiting for a reconnection" )
 
 client.close
 client2.close

tests/acceptance/fakes/dest/hang_after_connect.rb

@@ -26,8 +26,8 @@ client.close
 # Invert the sense of the timeout exception, since we *don't* want a
 # connection attempt
 begin
-  server.accept('Expected timeout')
-  raise 'Unexpected reconnection'
+  server.accept( "Expected timeout" )
+  fail "Unexpected reconnection"
 rescue Timeout::Error
   # expected 
 end

tests/acceptance/fakes/dest/hang_after_write.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # Open a socket, say hello, receive a write, then sleep for >
 # MS_REQUEST_LIMIT_SECS seconds. This should tell the source that the
 # write has gone MIA, and we expect a reconnect.
@@ -13,12 +15,12 @@ client1.write_hello
 client1.read_request
 
 t = Thread.start do
-  client2 = server.accept('Timed out waiting for a reconnection',
+  client2 = server.accept( "Timed out waiting for a reconnection",
                         FlexNBD::MS_REQUEST_LIMIT_SECS + 2 )
   client2.close
 end
 
-sleep_time = if ENV.key?('FLEXNBD_MS_REQUEST_LIMIT_SECS')
+sleep_time = if ENV.has_key?('FLEXNBD_MS_REQUEST_LIMIT_SECS')
   ENV['FLEXNBD_MS_REQUEST_LIMIT_SECS'].to_f
 else
   FlexNBD::MS_REQUEST_LIMIT_SECS

tests/acceptance/fakes/dest/hello_wrong_magic.rb

@@ -13,15 +13,15 @@ client1 = server.accept
 # We don't expect a reconnection attempt.
 t = Thread.new do
   begin
-    client2 = server.accept('Timed out waiting for a reconnection',
+    client2 = server.accept( "Timed out waiting for a reconnection",
                             FlexNBD::MS_RETRY_DELAY_SECS + 1 )
-    raise 'Unexpected reconnection'
+    fail "Unexpected reconnection"
   rescue Timeout::Error
     #expected
   end
 end
 
-client1.write_hello(magic: :wrong)
+client1.write_hello( :magic => :wrong )
 
 t.join
 

tests/acceptance/fakes/dest/hello_wrong_size.rb

@@ -18,21 +18,21 @@ t = Thread.new do
   # so it makes no sense to continue.  This means we have to invert the
   # sense of the exception.
   begin
-    client2 = server.accept('Timed out waiting for a reconnection',
+    client2 = server.accept( "Timed out waiting for a reconnection",
                             FlexNBD::MS_RETRY_DELAY_SECS + 1 )
     client2.close
-    raise 'Unexpected reconnection.'
+    fail "Unexpected reconnection."
   rescue Timeout::Error
   end
 end
 
-client.write_hello(size: :wrong)
+client.write_hello( :size => :wrong )
 
 t.join
 
 # Now check that the source closed the first socket (yes, this was an
 # actual bug)
 
-raise "Didn't close socket" unless client.disconnected?
+fail "Didn't close socket" unless client.disconnected?
 
 exit 0

tests/acceptance/fakes/dest/reject_acl.rb

@@ -10,13 +10,15 @@ addr, port = *ARGV
 server = FakeDest.new( addr, port )
 server.accept.close
 
+
 begin
   server.accept
-  raise 'Unexpected reconnection'
+  fail "Unexpected reconnection"
 rescue Timeout::Error
   # expected
 end
 
 server.close
 
+
 exit(0)

tests/acceptance/fakes/dest/sigterm_after_hello.rb

@@ -9,7 +9,7 @@ include FlexNBD
 
 addr, port, pid = *ARGV
 server = FakeDest.new( addr, port )
-client = server.accept('Timed out waiting for a connection')
+client = server.accept( "Timed out waiting for a connection" )
 client.write_hello
 
 Process.kill(15, pid.to_i)

tests/acceptance/fakes/dest/write_wrong_magic.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # Accept a connection, write hello, wait for a write request, read the
 # data, then write back a reply with a bad magic field.  We then
 # expect a reconnect.
@@ -13,7 +15,7 @@ client = server.accept
 client.write_hello
 req = client.read_request
 client.read_data( req[:len] )
-client.write_reply(req[:handle], 0, magic: :wrong)
+client.write_reply( req[:handle], 0, :magic => :wrong )
 
 client2 = server.accept
 client.close

tests/acceptance/fakes/source/close_after_connect.rb

@@ -11,13 +11,13 @@ include FlexNBD
 
 addr, port = *ARGV
 
-FakeSource.new(addr, port, 'Failed to connect').close
+FakeSource.new( addr, port, "Failed to connect" ).close
   # Sleep to be sure we don't try to connect too soon. That wouldn't
   # be a problem for the destination, but it would prevent us from
   # determining success or failure here in the case where we try to
   # reconnect before the destination has tidied up after the first
   # thread went away.
 sleep(0.5)
-FakeSource.new(addr, port, 'Failed to reconnect').close
+FakeSource.new( addr, port, "Failed to reconnect" ).close
 
 exit 0

tests/acceptance/fakes/source/close_after_entrust.rb

@@ -11,10 +11,10 @@ include FlexNBD
 
 addr, port, srv_pid = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 client.read_hello
 client.write_write_request( 0, 8 )
-client.write_data('12345678')
+client.write_data( "12345678" )
 
 # Use system "kill" rather than Process.kill because Process.kill
 # doesn't seem to work
@@ -25,11 +25,12 @@ client.close
 
 system "kill -CONT #{srv_pid}"
 
+
 sleep(0.25)
 
 begin
-  client2 = FakeSource.new(addr, port, 'Expected timeout')
-  raise 'Unexpected reconnection'
+  client2 = FakeSource.new( addr, port, "Expected timeout" )
+  fail "Unexpected reconnection"
 rescue Timeout::Error
   # expected
 end

tests/acceptance/fakes/source/close_after_entrust_reply.rb

@@ -10,10 +10,10 @@ include FlexNBD
 
 addr, port, srv_pid = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 client.read_hello
 client.write_write_request( 0, 8 )
-client.write_data('12345678')
+client.write_data( "12345678" )
 
 client.write_entrust_request
 client.read_response
@@ -21,11 +21,13 @@ client.close
 
 sleep(0.25)
 
+
 begin
-  client2 = FakeSource.new(addr, port, 'Expected timeout')
-  raise 'Unexpected reconnection'
+  client2 = FakeSource.new( addr, port, "Expected timeout" )
+  fail "Unexpected reconnection"
 rescue Timeout::Error
   # expected
 end
 
 exit(0)
+

tests/acceptance/fakes/source/close_after_hello.rb

@@ -12,12 +12,13 @@ include FlexNBD
 
 addr, port = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting.')
+
+client = FakeSource.new( addr, port, "Timed out connecting." )
 client.read_hello
 client.close
 
 sleep(0.2)
 
-FakeSource.new(addr, port, 'Timed out reconnecting.')
+FakeSource.new( addr, port, "Timed out reconnecting." )
 
 exit(0)

tests/acceptance/fakes/source/close_after_write.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # We connect, pause the server, issue a write request, disconnect,
 # then cont the server. This ensures that our disconnect happens
 # while the server is trying to read the write data.
@@ -8,7 +10,7 @@ include FlexNBD
 
 addr, port, srv_pid = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 client.read_hello
 
 system "kill -STOP #{srv_pid}"
@@ -22,7 +24,7 @@ system "kill -CONT #{srv_pid}"
 sleep(0.25)
 
 # ...and can we reconnect?
-client2 = FakeSource.new(addr, port, 'Timed out connecting')
+client2 = FakeSource.new( addr, port, "Timed out connecting" )
 client2.close
 
 exit(0)

tests/acceptance/fakes/source/close_after_write_data.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # We connect, pause the server, issue a write request, send data,
 # disconnect, then cont the server. This ensures that our disconnect
 # happens before the server can try to write the reply.
@@ -8,13 +10,13 @@ include FlexNBD
 
 addr, port, srv_pid = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 client.read_hello
 
 system "kill -STOP #{srv_pid}"
 
 client.write_write_request( 0, 8 )
-client.write_data('12345678')
+client.write_data( "12345678" )
 client.close
 
 system "kill -CONT #{srv_pid}"
@@ -25,7 +27,7 @@ system "kill -CONT #{srv_pid}"
 sleep(0.25)
 
 # ...and can we reconnect?
-client2 = FakeSource.new(addr, port, 'Timed out reconnecting')
+client2 = FakeSource.new( addr, port, "Timed out reconnecting" )
 client2.close
 
 exit(0)

tests/acceptance/fakes/source/close_mid_read.rb

@@ -8,9 +8,10 @@ include FlexNBD
 
 addr, port, srv_pid, newaddr, newport = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 client.write_read_request( 0, 8 )
 client.read_raw( 4 )
 client.close
 
+
 exit(0)

tests/acceptance/fakes/source/connect_during_hello.rb

@@ -10,9 +10,9 @@ include FlexNBD
 
 addr, port = *ARGV
 
-client1 = FakeSource.new(addr, port, 'Timed out connecting')
+client1 = FakeSource.new( addr, port, "Timed out connecting" )
 sleep(0.25)
-client2 = FakeSource.new(addr, port, 'Timed out connecting a second time')
+client2 = FakeSource.new( addr, port, "Timed out connecting a second time" )
 
 # This is the expected source crashing after connect
 client1.close

tests/acceptance/fakes/source/connect_from_banned_ip.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # We connect from a local address which should be blocked, sleep for a
 # bit, then try to read from the socket. We should get an instant EOF
 # as we've been cut off by the destination.
@@ -9,9 +11,10 @@ include FlexNBD
 
 addr, port = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting', '127.0.0.6')
+client = FakeSource.new( addr, port, "Timed out connecting", "127.0.0.6" )
 sleep( 0.25 )
 
 rsp = client.disconnected? ? 0 : 1
 client.close
 exit(rsp)
+

tests/acceptance/fakes/source/hang_after_hello.rb

@@ -7,10 +7,10 @@
 # listening for an incoming migration.
 
 addr, port = *ARGV
-require 'flexnbd/fake_source'
+require "flexnbd/fake_source"
 include FlexNBD
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 client.read_hello
 
 # Now we do two things:
@@ -25,7 +25,7 @@ kidpid = fork do
   client.close
   new_client = nil
   sleep( FlexNBD::CLIENT_MAX_WAIT_SECS + 1 )
-  new_client = FakeSource.new(addr, port, 'Timed out reconnecting.')
+  new_client = FakeSource.new( addr, port, "Timed out reconnecting." )
   new_client.read_hello
   exit 0
 end

tests/acceptance/fakes/source/sigterm_after_hello.rb

@@ -9,10 +9,10 @@ include FlexNBD
 
 addr, port, pid = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting.')
+client = FakeSource.new( addr, port, "Timed out connecting." )
 client.read_hello
 
-Process.kill('TERM', pid.to_i)
+Process.kill( "TERM", pid.to_i )
 
 sleep(0.2)
 client.close

tests/acceptance/fakes/source/successful_transfer.rb

@@ -9,9 +9,10 @@ include FlexNBD
 
 addr, port, srv_pid, newaddr, newport = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
-client.send_mirror
+client  = FakeSource.new( addr, port, "Timed out connecting" )
+client.send_mirror()
 
 sleep(1)
 
+
 exit( 0 )

tests/acceptance/fakes/source/write_out_of_range.rb

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
+
 # Connect, read the hello then make a write request with an impossible
 # (from,len) pair.  We expect an error response, and not to be
 # disconnected.
@@ -11,20 +13,20 @@ include FlexNBD
 
 addr, port = *ARGV
 
-client = FakeSource.new(addr, port, 'Timed out connecting')
+client = FakeSource.new( addr, port, "Timed out connecting" )
 hello = client.read_hello
-client.write_write_request(hello[:size] + 1, 32, 'myhandle')
-client.write_data('1' * 32)
+client.write_write_request( hello[:size]+1, 32, "myhandle" )
+client.write_data("1"*32)
 response = client.read_response
 
-raise 'Not an error' if response[:error] == 0
-raise 'Wrong handle' unless response[:handle] == 'myhandle'
+fail "Not an error" if response[:error] == 0
+fail "Wrong handle" unless "myhandle" == response[:handle]
 
 client.write_write_request( 0, 32 )
-client.write_data('2' * 32)
+client.write_data( "2"*32 )
 success_response = client.read_response
 
-raise 'Second write failed' unless success_response[:error] == 0
+fail "Second write failed" unless success_response[:error] == 0
 
 client.close
 exit(0)

tests/acceptance/file_writer.rb

@@ -3,13 +3,13 @@
 #
 class FileWriter
   def initialize(filename, blocksize)
-    @fh = File.open(filename, 'w+')
+    @fh = File.open(filename, "w+")
     @blocksize = blocksize
-    @pattern = ''
+    @pattern = ""
   end
 
   def size
-    @blocksize * @pattern.split('').size
+    @blocksize * @pattern.split("").size
   end
 
   # We write in fixed block sizes, given by "blocksize"
@@ -20,8 +20,8 @@ class FileWriter
   def write(data)
     @pattern += data
 
-    data.split('').each do |code|
-      if code == '_'
+    data.split("").each do |code|
+      if code == "_"
         @fh.seek(@blocksize, IO::SEEK_CUR)
       else
         @fh.write(data(code))
@@ -31,14 +31,15 @@ class FileWriter
     self
   end
 
+
   # Returns what the data ought to be at the given offset and length
   #
   def read_original( off, len )
-    patterns = @pattern.split('')
-    patterns.zip((0...patterns.length).to_a)
-            .map do |blk, blk_off|
+    patterns = @pattern.split( "" )
+    patterns.zip( (0...patterns.length).to_a ).
+      map { |blk, blk_off|
       data(blk, blk_off)
-    end.join[off...(off + len)]
+    }.join[off...(off+len)]
   end
 
   # Read what's actually in the file
@@ -61,14 +62,14 @@ class FileWriter
 
   def data(code, at=@fh.tell)
     case code
-    when '0', '_'
+      when "0", "_"
         "\0" * @blocksize
-    when 'X'
-      'X' * @blocksize
-    when 'f'
-      r = ''
+      when "X"
+        "X" * @blocksize
+      when "f"
+        r = ""
         (@blocksize/4).times do
-        r += [at].pack('I')
+          r += [at].pack("I")
           at += 4
         end
         r
@@ -76,49 +77,51 @@ class FileWriter
         raise "Unknown character '#{block}'"
     end
   end
+
 end
 
-if $PROGRAM_NAME == __FILE__
+if __FILE__==$0
   require 'tempfile'
   require 'test/unit'
 
   class FileWriterTest < Test::Unit::TestCase
     def test_read_original_zeros
-      Tempfile.open('test_read_original_zeros') do |tempfile|
+      Tempfile.open("test_read_original_zeros") do |tempfile|
         tempfile.close
         file = FileWriter.new( tempfile.path, 4096 )
-        file.write('0')
+        file.write( "0" )
         assert_equal file.read( 0, 4096 ), file.read_original( 0, 4096 )
-        assert(file.untouched?(0, 4096), 'Untouched file was touched.')
+        assert( file.untouched?(0,4096) , "Untouched file was touched." )
       end
     end
 
     def test_read_original_offsets
-      Tempfile.open('test_read_original_offsets') do |tempfile|
+      Tempfile.open("test_read_original_offsets") do |tempfile|
         tempfile.close
         file = FileWriter.new( tempfile.path, 4096 )
-        file.write('f')
+        file.write( "f" )
         assert_equal file.read( 0, 4096 ), file.read_original( 0, 4096 )
-        assert(file.untouched?(0, 4096), 'Untouched file was touched.')
+        assert( file.untouched?(0,4096) , "Untouched file was touched." )
       end
     end
 
     def test_file_size
-      Tempfile.open('test_file_size') do |tempfile|
+      Tempfile.open("test_file_size") do |tempfile|
         tempfile.close
         file = FileWriter.new( tempfile.path, 4096 )
-        file.write('f')
+        file.write( "f" )
         assert_equal 4096, File.stat( tempfile.path ).size
       end
     end
 
     def test_read_original_size
-      Tempfile.open('test_read_original_offsets') do |tempfile|
+      Tempfile.open("test_read_original_offsets") do |tempfile|
         tempfile.close
         file = FileWriter.new( tempfile.path, 4)
-        file.write('f' * 4)
+        file.write( "f"*4 )
         assert_equal 4, file.read_original(0, 4).length
       end
     end
   end
 end
+

tests/acceptance/flexnbd.rb

@@ -4,26 +4,28 @@ require 'open3'
 require 'timeout'
 require 'rexml/document'
 require 'rexml/streamlistener'
-require 'English'
 
 Thread.abort_on_exception = true
 
+
 class Executor
   attr_reader :pid
 
   def run( cmd )
-    @pid = fork { exec cmd }
+    @pid = fork do exec cmd end
   end
 end # class Executor
 
+
 class ValgrindExecutor
   attr_reader :pid
 
   def run( cmd )
-    @pid = fork { exec "valgrind --track-origins=yes --suppressions=custom.supp #{cmd}" }
+    @pid = fork do exec "valgrind --track-origins=yes --suppressions=custom.supp #{cmd}" end
   end
 end # class ValgrindExecutor
 
+
 class ValgrindKillingExecutor
   attr_reader :pid
 
@@ -32,9 +34,9 @@ class ValgrindKillingExecutor
     attr_reader :backtrace
     def initialize
       @backtrace=[]
-      @what = ''
-      @kind = ''
-      @pid = ''
+      @what = ""
+      @kind = ""
+      @pid = ""
     end
 
     def add_frame
@@ -56,8 +58,10 @@ class ValgrindKillingExecutor
     def to_s
       ([@what + " (#{@kind}) in #{@pid}"] + @backtrace.map{|h| "#{h[:file]}:#{h[:line]} #{h[:fn]}" }).join("\n")
     end
+
   end # class Error
 
+
   class ErrorListener
     include REXML::StreamListener
     def initialize( killer )
@@ -70,36 +74,39 @@ class ValgrindKillingExecutor
       @text = text
     end
 
-    def tag_start(tag, _attrs)
+    def tag_start(tag, attrs)
       case tag.to_s
-      when 'error'
+      when "error"
         @found = true
-      when 'frame'
+      when "frame"
         @error.add_frame
       end
     end
 
     def tag_end(tag)
       case tag.to_s
-      when 'what'
+      when "what"
         @error.what = @text if @found
-        @text = ''
-      when 'kind'
+        @text = ""
+      when "kind"
         @error.kind = @text if @found
-      when 'file'
+      when "file"
         @error.add_file( @text ) if @found
-      when 'fn'
+      when "fn"
         @error.add_fn( @text ) if @found
-      when 'line'
+      when "line"
         @error.add_line( @text ) if @found
-      when 'error', 'stack'
-        @killer.call(@error) if @found
-      when 'pid'
+      when "error", "stack"
+        if @found
+          @killer.call( @error )
+        end
+      when "pid"
         @error.pid=@text
       end
     end
   end # class ErrorListener
 
+
   class DebugErrorListener < ErrorListener
     def text( txt )
       print txt
@@ -117,41 +124,47 @@ class ValgrindKillingExecutor
     end
   end
 
+
   def initialize
     @pid = nil
   end
 
   def run( cmd )
     @io_r, io_w = IO.pipe
-    @pid = fork { exec("valgrind --suppressions=custom.supp --xml=yes --xml-fd=#{io_w.fileno} " + cmd) }
+    @pid = fork do exec( "valgrind --suppressions=custom.supp --xml=yes --xml-fd=#{io_w.fileno} " + cmd ) end
     launch_watch_thread( @pid, @io_r )
     @pid
   end
 
+
   def call( err )
-    warn '*' * 72
-    warn '* Valgrind error spotted:'
-    warn err.to_s.split("\n").map { |s| "  #{s}" }
-    warn '*' * 72
-    Process.kill('KILL', @pid)
+    $stderr.puts "*"*72
+    $stderr.puts "* Valgrind error spotted:"
+    $stderr.puts err.to_s.split("\n").map{|s| "  #{s}"}
+    $stderr.puts "*"*72
+    Process.kill( "KILL", @pid )
     exit(1)
   end
 
+
   private
 
   def pick_listener
     ENV['DEBUG'] ? DebugErrorListener : ErrorListener
   end
 
-  def launch_watch_thread(_pid, io_r)
+  def launch_watch_thread(pid, io_r)
     Thread.start do
       io_source = REXML::IOSource.new( io_r )
       listener = pick_listener.new( self )
       REXML::Document.parse_stream( io_source, listener )
     end
   end
+
+
 end # class ValgrindExecutor
 
+
 module FlexNBD
   # Noddy test class to exercise FlexNBD from the outside for testing.
   #
@@ -176,11 +189,12 @@ module FlexNBD
             end
     end
 
+
     def build_debug_opt
       if @do_debug
-        '--verbose'
+        "--verbose"
       else
-        '--quiet'
+        "--quiet"
       end
     end
 
@@ -195,19 +209,20 @@ module FlexNBD
       @ctrl = "/tmp/.flexnbd.ctrl.#{Time.now.to_i}.#{rand}"
       @ip = ip
       @port = port
-      @pid = @wait_thread = nil
       @kill = []
       @prefetch_proxy = false
     end
 
+
     def debug?
       !!@do_debug
     end
 
     def debug( msg )
-      warn msg if debug?
+      $stderr.puts msg if debug?
     end
 
+
     def serve_cmd( file, acl )
       "#{bin} serve "\
         "--addr #{ip} "\
@@ -218,6 +233,7 @@ module FlexNBD
         "#{acl.join(' ')}"
     end
 
+
     def listen_cmd( file, acl )
       "#{bin} listen "\
         "--addr #{ip} "\
@@ -234,10 +250,11 @@ module FlexNBD
         "--port #{port} "\
         "--conn-addr #{connect_ip} "\
         "--conn-port #{connect_port} "\
-        "#{prefetch_proxy ? '--cache ' : ''}"\
+        "#{prefetch_proxy ? "--cache " : ""}"\
         "#{@debug}"
     end
 
+
     def read_cmd( offset, length )
       "#{bin} read "\
         "--addr #{ip} "\
@@ -247,6 +264,7 @@ module FlexNBD
         "--size #{length}"
     end
 
+
     def write_cmd( offset, data )
       "#{bin} write "\
         "--addr #{ip} "\
@@ -256,6 +274,7 @@ module FlexNBD
         "--size #{data.length}"
     end
 
+
     def base_mirror_opts( dest_ip, dest_port )
       "--addr #{dest_ip} "\
         "--port #{dest_port} "\
@@ -264,7 +283,7 @@ module FlexNBD
 
     def unlink_mirror_opts( dest_ip, dest_port )
       "#{base_mirror_opts( dest_ip, dest_port )} "\
-        '--unlink '
+        "--unlink "
     end
 
     def base_mirror_cmd( opts )
@@ -297,52 +316,46 @@ module FlexNBD
       "#{@bin} acl " \
         "--sock #{ctrl} "\
         "#{@debug} "\
-        "#{acl.join ' '}"
+        "#{acl.join " "}"
     end
 
+
     def run_serve_cmd(cmd)
-      File.unlink(ctrl) if File.exist?(ctrl)
+      File.unlink(ctrl) if File.exists?(ctrl)
       debug( cmd )
 
       @pid = @executor.run( cmd )
 
-      until File.socket?(ctrl)
+      while !File.socket?(ctrl)
         pid, status = Process.wait2(@pid, Process::WNOHANG)
         raise "server did not start (#{cmd})" if pid
         sleep 0.1
       end
 
+
       start_wait_thread( @pid )
       at_exit { kill }
     end
     private :run_serve_cmd
 
+
     def serve( file, *acl)
       cmd = serve_cmd( file, acl )
       run_serve_cmd( cmd )
-      sleep(0.2) until File.exist?(ctrl)
+      sleep( 0.2 ) until File.exists?( ctrl )
     end
 
+
     def listen(file, *acl)
       run_serve_cmd( listen_cmd( file, acl ) )
     end
 
     def tcp_server_open?
       # raises if the other side doesn't accept()
-      sock = begin
-               TCPSocket.new(ip, port)
-             rescue StandardError
-               nil
-             end
+      sock = TCPSocket.new(ip, port) rescue nil
 
       success = !!sock
-      if sock
-        (begin
-            sock.close
-          rescue StandardError
-            nil
-          end)
-      end
+      ( sock.close rescue nil) if sock
       success
     end
 
@@ -362,25 +375,27 @@ module FlexNBD
       at_exit { kill }
     end
 
+
     def start_wait_thread( pid )
       @wait_thread = Thread.start do
         _, status = Process.waitpid2( pid )
 
         if @kill
           if status.signaled?
-            raise "flexnbd quit with a bad signal: #{status.inspect}" unless
+            fail "flexnbd quit with a bad signal: #{status.inspect}" unless
             @kill.include? status.termsig
           else
-            raise "flexnbd quit with a bad status: #{status.inspect}" unless
+            fail "flexnbd quit with a bad status: #{status.inspect}" unless
             @kill.include? status.exitstatus
           end
         else
-          warn "flexnbd #{self.pid} quit"
-          raise "flexnbd #{self.pid} quit early with status #{status.to_i}"
+          $stderr.puts "flexnbd #{self.pid} quit"
+          fail "flexnbd #{self.pid} quit early with status #{status.to_i}"
         end
       end
     end
 
+
     def can_die(*status)
       status = [0] if status.empty?
       @kill += status
@@ -392,7 +407,7 @@ module FlexNBD
       can_die(1)
       if @pid
         begin
-          Process.kill('INT', @pid)
+          Process.kill("INT", @pid)
         rescue Errno::ESRCH => e
           # already dead.  Presumably this means it went away after a
           # can_die() call.
@@ -408,7 +423,7 @@ module FlexNBD
       IO.popen(cmd) do |fh|
         return fh.read
       end
-      raise IOError, 'NBD read failed' unless $CHILD_STATUS.success?
+      raise IOError.new "NBD read failed" unless $?.success?
       out
     end
 
@@ -416,24 +431,27 @@ module FlexNBD
       cmd = write_cmd( offset, data )
       debug( cmd )
 
-      IO.popen(cmd, 'w') do |fh|
+      IO.popen(cmd, "w") do |fh|
         fh.write(data)
       end
-      raise IOError, 'NBD write failed' unless $CHILD_STATUS.success?
+      raise IOError.new "NBD write failed" unless $?.success?
       nil
     end
 
+
     def join
       @wait_thread.join
     end
 
-    def mirror_unchecked(dest_ip, dest_port, _bandwidth = nil, _action = nil, timeout = nil)
+
+    def mirror_unchecked( dest_ip, dest_port, bandwidth=nil, action=nil, timeout=nil )
       cmd = mirror_cmd( dest_ip, dest_port)
       debug( cmd )
 
       maybe_timeout( cmd, timeout )
     end
 
+
     def mirror_unlink( dest_ip, dest_port, timeout=nil )
       cmd = mirror_unlink_cmd( dest_ip, dest_port )
       debug( cmd )
@@ -441,11 +459,11 @@ module FlexNBD
       maybe_timeout( cmd, timeout )
     end
 
+
     def maybe_timeout(cmd, timeout=nil )
-      stdout = ''
-      stderr = ''
+      stdout, stderr = "",""
       stat = nil
-      run = proc do
+      run = Proc.new do
         # Ruby 1.9 changed the popen3 api. instead of 3 args, the block
         # gets 4. Not only that, but it no longer sets $?, so we have to
         # go elsewhere for the process' exit status.
@@ -455,7 +473,7 @@ module FlexNBD
           stderr.replace io_err.read
           stat = maybe_thr.value if maybe_thr
         end
-        stat ||= $CHILD_STATUS
+        stat ||= $?
       end
 
       if timeout
@@ -467,13 +485,16 @@ module FlexNBD
       [stdout, stderr, stat]
     end
 
+
     def mirror(dest_ip, dest_port, bandwidth=nil, action=nil)
       stdout, stderr, status = mirror_unchecked( dest_ip, dest_port, bandwidth, action )
-      raise IOError, "Migrate command failed\n" + stderr unless status.success?
+      raise IOError.new( "Migrate command failed\n" + stderr) unless status.success?
 
       stdout
     end
 
+
+
     def break(timeout=nil)
       cmd = break_cmd
       debug( cmd )
@@ -481,6 +502,7 @@ module FlexNBD
       maybe_timeout( cmd, timeout )
     end
 
+
     def acl(*acl)
       cmd = acl_cmd( *acl )
       debug( cmd )
@@ -488,8 +510,9 @@ module FlexNBD
       maybe_timeout( cmd, 2 )
     end
 
+
     def status( timeout = nil )
-      cmd = status_cmd
+      cmd = status_cmd()
       debug( cmd )
 
       o,e = maybe_timeout( cmd, timeout )
@@ -497,43 +520,50 @@ module FlexNBD
       [parse_status(o), e]
     end
 
+
     def launched?
       !!@pid
     end
 
+
     def paused
-      Process.kill('STOP', @pid)
+      Process.kill( "STOP", @pid )
       yield
     ensure
-      Process.kill('CONT', @pid)
+      Process.kill( "CONT", @pid )
     end
 
-    protected
 
+    protected
     def control_command(*args)
-      raise 'Server not running' unless @pid
+      raise "Server not running" unless @pid
       args = args.compact
       UNIXSocket.open(@ctrl) do |u|
         u.write(args.join("\n") + "\n")
-        code, message = u.readline.split(': ', 2)
+        code, message = u.readline.split(": ", 2)
         return [code, message]
       end
     end
 
+
     def parse_status( status )
       hsh = {}
 
-      status.split(' ').each do |part|
+      status.split(" ").each do |part|
         next if part.strip.empty?
-        a, b = part.split('=')
+        a,b = part.split("=")
         b.strip!
-        b = true if b == 'true'
-        b = false if b == 'false'
+        b = true if b == "true"
+        b = false if b == "false"
 
         hsh[a.strip] = b
       end
 
       hsh
     end
+
+
   end
+
 end
+

tests/acceptance/flexnbd/constants.rb

@@ -1,7 +1,10 @@
+# encoding: utf-8
+
 module FlexNBD
+
   def self.binary( str )
     if str.respond_to? :force_encoding
-      str.force_encoding 'ASCII-8BIT'
+      str.force_encoding "ASCII-8BIT"
     else
       str
     end
@@ -10,33 +13,36 @@ module FlexNBD
   # eeevil is his one and only name...
   def self.read_constants
     parents = []
-    current = File.expand_path('.')
-    while current != '/'
+    current = File.expand_path(".")
+    while current != "/"
       parents << current
-      current = File.expand_path(File.join(current, '..'))
+      current = File.expand_path( File.join( current, ".." ) )
     end
 
     source_root = parents.find do |dirname|
-      File.directory?(File.join(dirname, 'src'))
+      File.directory?( File.join( dirname, "src" ) )
     end
 
-    raise 'No source root!' unless source_root
+    fail "No source root!" unless source_root
 
-    headers = Dir[File.join(source_root, 'src', '{common,proxy,server}', '*.h')]
+    headers = Dir[File.join( source_root, "src", "{common,proxy,server}","*.h" ) ]
 
     headers.each do |header_filename|
       txt_lines = File.readlines( header_filename )
       txt_lines.each do |line|
         if line =~ /^#\s*define\s+([A-Z0-9_]+)\s+(\d+)\s*$/
           # Bodge until I can figure out what to do with #ifdefs
-          const_set(Regexp.last_match(1), Regexp.last_match(2).to_i) unless const_defined?(Regexp.last_match(1))
-        end
+          const_set($1, $2.to_i) unless const_defined?( $1 )
         end
       end
     end
 
-  read_constants
+  end
+
+  read_constants()
 
   REQUEST_MAGIC = binary("\x25\x60\x95\x13") unless defined?(REQUEST_MAGIC)
   REPLY_MAGIC = binary("\x67\x44\x66\x98") unless defined?(REPLY_MAGIC)
+
 end # module FlexNBD
+

tests/acceptance/flexnbd/fake_dest.rb

@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 require 'socket'
 require 'timeout'
 
@@ -5,13 +7,15 @@ require 'flexnbd/constants'
 
 module FlexNBD
   class FakeDest
+
     class Client
       def initialize( sock )
         @sock = sock
       end
 
+
       def write_hello( opts = {} )
-        @sock.write('NBDMAGIC')
+        @sock.write( "NBDMAGIC" )
 
         if opts[:magic] == :wrong
           write_rand( @sock, 8 )
@@ -28,11 +32,13 @@ module FlexNBD
         @sock.write( "\x00" * 128 )
       end
 
+
       def write_rand( sock, len )
-        len.times { sock.write(rand(256).chr) }
+        len.times do sock.write( rand(256).chr ) end
       end
 
-      def read_request
+
+      def read_request()
         req = @sock.read(28)
 
         magic_s  = req[0  ... 4 ]
@@ -42,11 +48,11 @@ module FlexNBD
         len_s    = req[24 ... 28]
 
         {
-          magic: magic_s,
-          type: type_s.unpack('N').first,
-          handle: handle_s,
-          from: self.class.parse_be64(from_s),
-          len: len_s.unpack('N').first
+          :magic  => magic_s,
+          :type   => type_s.unpack("N").first,
+          :handle => handle_s,
+          :from   => self.class.parse_be64( from_s ),
+          :len    => len_s.unpack( "N").first
         }
       end
 
@@ -55,12 +61,14 @@ module FlexNBD
       end
 
       def disconnected?
+        begin
           Timeout.timeout(2) do
-          @sock.read(1).nil?
+            @sock.read(1) == nil
           end
         rescue Timeout::Error
           return false
         end
+      end
 
       def write_reply( handle, err=0, opts={} )
         if opts[:magic] == :wrong
@@ -69,14 +77,16 @@ module FlexNBD
           @sock.write( ::FlexNBD::REPLY_MAGIC )
         end
 
-        @sock.write([err].pack('N'))
+        @sock.write( [err].pack("N") )
         @sock.write( handle )
       end
 
+
       def close
         @sock.close
       end
 
+
       def read_data( len )
         @sock.read( len )
       end
@@ -85,23 +95,25 @@ module FlexNBD
         @sock.write( len )
       end
 
+
       def self.parse_be64(str)
         raise "String is the wrong length: 8 bytes expected (#{str.length} received)" unless
           str.length == 8
 
-        top, bottom = str.unpack('NN')
+        top, bottom = str.unpack("NN")
         (top << 32) + bottom
       end
 
+
       def receive_mirror( opts = {} )
-        write_hello
+        write_hello()
         loop do
           req = read_request
           case req[:type]
           when 1
             read_data( req[:len] )
             write_reply( req[:handle] )
-          when 65_536
+          when 65536
             write_reply( req[:handle], opts[:err] == :entrust ? 1 : 0 )
             break
           else
@@ -117,13 +129,16 @@ module FlexNBD
           raise "Not a disconnect: #{req.inspect}"
         end
       end
+
     end # class Client
 
+
     def initialize( addr, port )
       @sock = TCPServer.new( addr, port )
     end
 
-    def accept(err_msg = 'Timed out waiting for a connection', timeout = 5)
+
+    def accept( err_msg = "Timed out waiting for a connection", timeout = 5)
       client_sock = nil
 
       begin
@@ -131,7 +146,7 @@ module FlexNBD
           client_sock = @sock.accept
         end
       rescue Timeout::Error
-        raise Timeout::Error, err_msg
+        raise Timeout::Error.new(err_msg)
       end
 
       client_sock
@@ -139,8 +154,13 @@ module FlexNBD
       Client.new( client_sock )
     end
 
+
     def close
       @sock.close
     end
+
+
+
   end # module FakeDest
 end # module FlexNBD
+

tests/acceptance/flexnbd/fake_source.rb

@@ -1,9 +1,12 @@
+# encoding: utf-8
+
 require 'socket'
-require 'timeout'
+require "timeout"
 require 'flexnbd/constants'
 
 module FlexNBD
   class FakeSource
+
     def initialize( addr, port, err_msg, source_addr=nil, source_port=0 )
       timing_out( 2, err_msg ) do
         begin
@@ -13,76 +16,75 @@ module FlexNBD
                     TCPSocket.new( addr, port )
                   end
         rescue Errno::ECONNREFUSED
-          warn 'Connection refused, retrying'
+          $stderr.puts "Connection refused, retrying"
           sleep(0.2)
           retry
         end
       end
     end
 
+
     def close
       @sock.close
     end
 
-    def read_hello
+
+    def read_hello()
       timing_out( ::FlexNBD::MS_HELLO_TIME_SECS,
-                 'Timed out waiting for hello.') do
-        raise 'No hello.' unless (hello = @sock.read(152)) &&
+                  "Timed out waiting for hello." ) do
+        fail "No hello." unless (hello = @sock.read( 152 )) &&
           hello.length==152
 
-        passwd_s = hello[0..7]
-        magic    = hello[8..15].unpack('Q>').first
-        size     = hello[16..23].unpack('Q>').first
-        flags    = hello[24..27].unpack('L>').first
-        reserved = hello[28..-1]
+        magic_s = hello[0..7]
+        ignore_s= hello[8..15]
+        size_s  = hello[16..23]
 
-        return { passwd: passwd_s, magic: magic, size: size, flags: flags, reserved: reserved }
+        size_h, size_l = size_s.unpack("NN")
+        size = (size_h << 32) + size_l
+
+        return { :magic => magic_s, :size => size }
       end
     end
 
-    def send_request(type, handle = 'myhandle', from = 0, len = 0, magic = REQUEST_MAGIC, flags = 0)
-      raise 'Bad handle' unless handle.length == 8
+
+    def send_request( type, handle="myhandle", from=0, len=0, magic=REQUEST_MAGIC )
+      fail "Bad handle" unless handle.length == 8
 
       @sock.write( magic )
-      @sock.write([flags].pack('n'))
-      @sock.write([type].pack('n'))
+      @sock.write( [type].pack( 'N' ) )
       @sock.write( handle )
       @sock.write( [n64( from )].pack( 'q' ) )
       @sock.write( [len].pack( 'N' ) )
     end
 
-    def write_write_request(from, len, handle = 'myhandle')
+
+    def write_write_request( from, len, handle="myhandle" )
       send_request( 1, handle, from, len )
     end
 
-    def write_write_request_with_fua(from, len, handle = 'myhandle')
-      send_request(1, handle, from, len, REQUEST_MAGIC, 1)
+
+    def write_entrust_request( handle="myhandle" )
+      send_request( 65536, handle )
     end
 
-    def write_flush_request(handle = 'myhandle')
-      send_request(3, handle, 0, 0)
-    end
-
-    def write_entrust_request(handle = 'myhandle')
-      send_request(65_536, handle)
-    end
-
-    def write_disconnect_request(handle = 'myhandle')
+    def write_disconnect_request( handle="myhandle" )
       send_request( 2, handle )
     end
 
-    def write_read_request(from, len, _handle = 'myhandle')
-      send_request(0, 'myhandle', from, len)
+    def write_read_request( from, len, handle="myhandle" )
+      send_request( 0, "myhandle", from, len )
     end
 
+
     def write_data( data )
       @sock.write( data )
     end
 
+
     # Handy utility
     def read( from, len )
-      timing_out(2, 'Timed out reading') do
-        send_request(0, 'myhandle', from, len)
+      timing_out( 2, "Timed out reading" ) do
+        send_request( 0, "myhandle", from, len )
         read_raw( len )
       end
     end
@@ -92,26 +94,19 @@ module FlexNBD
     end
 
     def send_mirror
-      read_hello
-      write(0, '12345678')
-      read_response
-      write_disconnect_request
-      close
+      read_hello()
+      write( 0, "12345678" )
+      read_response()
+      write_disconnect_request()
+      close()
     end
 
+
     def write( from, data )
       write_write_request( from, data.length )
       write_data( data )
     end
 
-    def write_with_fua(from, data)
-      write_write_request_with_fua(from, data.length)
-      write_data(data)
-    end
-
-    def flush
-      write_flush_request
-    end
 
     def read_response
       magic = @sock.read(4)
@@ -119,26 +114,30 @@ module FlexNBD
       handle = @sock.read(8)
 
       {
-        magic: magic,
-        error: error_s.unpack('N').first,
-        handle: handle
+        :magic => magic,
+        :error => error_s.unpack("N").first,
+        :handle => handle
       }
     end
 
+
     def disconnected?
       result = nil
-      Timeout.timeout(2) { result = @sock.read(1).nil? }
+      Timeout.timeout( 2 ) { result = ( @sock.read(1) == nil ) }
       result
     end
 
+
     def timing_out( time, msg )
+      begin
         Timeout.timeout( time ) do
           yield
         end
       rescue Timeout::Error
-      warn msg
+        $stderr.puts msg
         exit 1
       end
+    end
 
     private
 
@@ -155,5 +154,7 @@ module FlexNBD
       ((b & 0x000000000000ff00) << 40) |
       ((b & 0x00000000000000ff) << 56)
     end
+
   end # class FakeSource
 end # module FlexNBD
+

tests/acceptance/ld_preload.rb

@@ -1,55 +0,0 @@
-require 'tempfile'
-
-#
-# LdPreload is a little wrapper for using LD_PRELOAD loggers to pick up system
-# calls when testing flexnbd.
-#
-module LdPreload
-  #
-  # This takes an object name, sets up a temporary log file, whose name is
-  # recorded in the environment as OUTPUT_obj_name, where obj_name is the
-  # name of the preload module to build and load.
-  def with_ld_preload(obj_name)
-    @ld_preload_logs ||= {}
-    flunk 'Can only load a preload module once!' if @ld_preload_logs[obj_name]
-
-    system("make -C ld_preloads/ #{obj_name}.o > /dev/null") ||
-      flunk("Failed to build object #{obj_name}")
-    orig_env = ENV['LD_PRELOAD']
-    ENV['LD_PRELOAD'] = [orig_env, File.expand_path("./ld_preloads/#{obj_name}.o")].compact.join(' ')
-
-    # Open the log, and stick it in a hash
-    @ld_preload_logs[obj_name] = Tempfile.new(obj_name)
-    ENV['OUTPUT_' + obj_name] = @ld_preload_logs[obj_name].path
-
-    yield
-  ensure
-    if @ld_preload_logs[obj_name]
-      @ld_preload_logs[obj_name].close
-      @ld_preload_logs.delete(obj_name)
-    end
-    ENV['LD_PRELOAD'] = orig_env
-  end
-
-  def read_ld_preload_log(obj_name)
-    lines = []
-    lines << @ld_preload_logs[obj_name].readline.chomp until
-      @ld_preload_logs[obj_name].eof?
-    lines
-  end
-
-  #
-  # The next to methods assume the log file has one entry per line, and that
-  # each entry is a series of values separated by colons.
-  #
-  def parse_ld_preload_logs(obj_name)
-    read_ld_preload_log(obj_name).map do |l|
-      l.split(':').map { |i| i =~ /^\d+$/ ? i.to_i : i }
-    end
-  end
-
-  def assert_func_call(loglines, args, msg)
-    re = Regexp.new('^' + args.join(':'))
-    assert(loglines.any? { |l| l.match(re) }, msg)
-  end
-end

tests/acceptance/ld_preloads/Makefile

@@ -1,13 +0,0 @@
-
-SRC := $(wildcard *.c)
-OBJS := $(SRC:%.c=%.o)
-
-all: $(OBJS)
-
-clean:
-	$(RM) $(OBJS)
-
-%.o: %.c
-	gcc -shared -fPIC -ldl -o $@ $<
-
-.PHONY: all clean

tests/acceptance/ld_preloads/msync_logger.c

@@ -1,33 +0,0 @@
-#define _GNU_SOURCE
-
-#include <dlfcn.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-
-typedef int (*real_msync_t)(void *addr, size_t length, int flags);
-
-int real_msync(void *addr, size_t length, int flags) {
-  return ((real_msync_t)dlsym(RTLD_NEXT, "msync"))(addr, length, flags);
-}
-
-/*
- * Noddy LD_PRELOAD wrapper to catch msync calls, and log them to a file.
- */
-
-int msync(void *addr, size_t length, int flags) {
-  FILE *fd;
-  char *fn;
-  int retval;
-  
-  retval = real_msync(addr, length, flags);
-  
-  fn = getenv("OUTPUT_msync_logger");
-  if ( fn != NULL ) {
-    fd = fopen(fn,"a");
-    fprintf(fd,"msync:%d:%i:%i:%i\n", addr, length, flags, retval);
-    fclose(fd);
-  }
-
-  return retval;
-}

tests/acceptance/ld_preloads/setsockopt_logger.c

@@ -1,38 +0,0 @@
-#define _GNU_SOURCE
-
-#include <dlfcn.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/socket.h>
-
-/*
- * Noddy LD_PRELOAD wrapper to catch setsockopt calls, and log them to a file.
- */
-
-typedef int (*real_setsockopt_t)(int sockfd, int level, int optname, const void *optval, socklen_t optlen);
-
-int real_setsockopt(int sockfd, int level, int optname, const void *optval, socklen_t optlen)
-{
-  return ((real_setsockopt_t)dlsym(RTLD_NEXT, "setsockopt"))(sockfd, level, optname, optval, optlen);
-}
-
-int setsockopt(int sockfd, int level, int optname, const void *optval, socklen_t optlen)
-{
-  FILE *fd;
-  char *fn;
-  int retval;
-  
-  retval = real_setsockopt(sockfd, level, optname, optval, optlen);
-  fn = getenv("OUTPUT_setsockopt_logger");
-
-  /* 
-   * Only interested in catching non-null 4-byte (integer) values 
-   */
-  if ( fn != NULL && optval != NULL && optlen == 4) {
-    fd = fopen(fn,"a");
-    fprintf(fd,"setsockopt:%i:%i:%i:%i:%i\n", sockfd, level, optname, *(int *)optval, retval);
-    fclose(fd);
-  }
-
-  return retval;
-}

tests/acceptance/nbd_scenarios

@@ -1,6 +1,6 @@
 #!/usr/bin/ruby
 
-test_files = Dir[File.dirname(__FILE__) + '/test*.rb']
+test_files = Dir[File.dirname( __FILE__ ) + "/test*.rb"]
 for filename in test_files
   require filename
 end

tests/acceptance/proxy_tests.rb

@@ -1,12 +1,8 @@
-
+# encoding: utf-8
 require 'flexnbd/fake_source'
 require 'flexnbd/fake_dest'
-require 'ld_preload'
 
 module ProxyTests
-
-  include LdPreload
-
   def b
     "\xFF".b
   end
@@ -17,17 +13,14 @@ module ProxyTests
     @env.nbd2.can_die(0)
     client = FlexNBD::FakeSource.new(@env.ip, @env.port2, "Couldn't connect to proxy")
     begin
+
       result = client.read_hello
-      assert_equal 'NBDMAGIC', result[:passwd]
+      assert_equal "NBDMAGIC", result[:magic]
       assert_equal override_size || @env.file1.size, result[:size]
 
       yield client
     ensure
-      begin
-        client.close
-      rescue StandardError
-        nil
-      end
+      client.close rescue nil
     end
   end
 
@@ -39,11 +32,11 @@ module ProxyTests
     with_proxied_client do |client|
       (0..3).each do |n|
         offset = n * 4096
-        client.write_read_request(offset, 4096, 'myhandle')
+        client.write_read_request(offset, 4096, "myhandle")
         rsp = client.read_response
 
         assert_equal ::FlexNBD::REPLY_MAGIC, rsp[:magic]
-        assert_equal 'myhandle', rsp[:handle]
+        assert_equal "myhandle", rsp[:handle]
         assert_equal 0, rsp[:error]
 
         orig_data = @env.file1.read(offset, 4096)
@@ -66,7 +59,7 @@ module ProxyTests
         rsp = client.read_response
 
         assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-        assert_equal 'myhandle', rsp[:handle]
+        assert_equal "myhandle", rsp[:handle]
         assert_equal 0, rsp[:error]
 
         data = @env.file1.read(offset, 4096)
@@ -76,20 +69,6 @@ module ProxyTests
     end
   end
 
-  def test_write_request_past_end_of_disc_returns_to_client
-    with_proxied_client do |client|
-      n = 1000
-      offset = n * 4096
-      client.write(offset, b * 4096)
-      rsp = client.read_response
-
-      assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-      assert_equal 'myhandle', rsp[:handle]
-      # NBD protocol say ENOSPC (28) in this situation
-      assert_equal 28, rsp[:error]
-    end
-  end
-
   def make_fake_server
     server = FlexNBD::FakeDest.new(@env.ip, @env.port1)
     @server_up = true
@@ -135,23 +114,23 @@ module ProxyTests
       sc2.write_data( b * 4096 )
 
       # Check it to make sure it's correct
-      rsp = Timeout.timeout(15) { client.read_response }
+      rsp = timeout(15) { client.read_response }
       assert_equal ::FlexNBD::REPLY_MAGIC, rsp[:magic]
       assert_equal 0, rsp[:error]
       assert_equal req1[:handle], rsp[:handle]
 
       data = client.read_raw( 4096 )
-      assert_equal((b * 4096), data, 'Wrong data returned')
+      assert_equal( (b * 4096), data, "Wrong data returned" )
 
       sc2.close
       server.close
     end
+
   end
 
   def test_write_request_retried_when_upstream_dies_partway
     maker = make_fake_server
 
-    with_ld_preload('setsockopt_logger') do
     with_proxied_client(4096) do |client|
       server, sc1 = maker.value
 
@@ -165,11 +144,7 @@ module ProxyTests
       assert_equal 0, req1[:from]
       assert_equal 4096, req1[:len]
       data1 = sc1.read_data( 4096 )
-        assert_equal((b * 4096), data1, 'Data not proxied successfully')
-
-        # Read the setsockopt logs, so we can check that TCP_NODELAY is re-set
-        # later
-        read_ld_preload_log('setsockopt_logger')
+      assert_equal( ( b * 4096 ), data1, "Data not proxied successfully" )
 
       # Kill the server again, now we're sure the read request has been sent once
       sc1.close
@@ -188,53 +163,32 @@ module ProxyTests
       sc2.write_reply( req2[:handle] )
 
       # Check it to make sure it's correct
-        rsp = Timeout.timeout(15) { client.read_response }
+      rsp = timeout(15) { client.read_response }
       assert_equal ::FlexNBD::REPLY_MAGIC, rsp[:magic]
       assert_equal 0, rsp[:error]
       assert_equal req1[:handle], rsp[:handle]
 
       sc2.close
       server.close
-
-        # Check TCP_NODELAY was set on the upstream socket
-        log = read_ld_preload_log('setsockopt_logger')
-        assert_func_call(log,
-                         ['setsockopt', 3,
-                          Socket::SOL_TCP, Socket::TCP_NODELAY, 1, 0],
-                         'TCP_NODELAY not set on upstream fd 3')
-      end
     end
   end
 
   def test_only_one_client_can_connect_to_proxy_at_a_time
-    with_proxied_client do |_client|
+    with_proxied_client do |client|
+
       c2 = nil
       assert_raises(Timeout::Error) do
-        Timeout.timeout(1) do
+        timeout(1) do
           c2 = FlexNBD::FakeSource.new(@env.ip, @env.port2, "Couldn't connect to proxy (2)")
           c2.read_hello
         end
       end
-      if c2
-        begin
-          c2.close
-        rescue StandardError
-          nil
-        end
-      end
-    end
+      c2.close rescue nil if c2
     end
 
-  def test_maximum_write_request_size
-    # Defined in src/common/nbdtypes.h
-    nbd_max_block_size = 32 * 1024 * 1024
-    @env.writefile1('0' * 40 * 1024)
-    with_proxied_client do |client|
-      # This will crash with EPIPE if the proxy dies.
-      client.write(0, b * nbd_max_block_size)
-      rsp = client.read_response
-      assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-      assert_equal 0, rsp[:error]
-    end
+
   end
+
 end
+
+

tests/acceptance/test_dest_error_handling.rb

@@ -1,10 +1,13 @@
+# encoding: utf-8
+
 require 'test/unit'
 require 'environment'
 
 class TestDestErrorHandling  < Test::Unit::TestCase
+
   def setup
     @env = Environment.new
-    @env.writefile1('0' * 4)
+    @env.writefile1( "0" * 4 )
     @env.listen1
   end
 
@@ -12,77 +15,89 @@ class TestDestErrorHandling < Test::Unit::TestCase
     @env.cleanup
   end
 
+
   def test_hello_blocked_by_disconnect_causes_error_not_fatal
-    run_fake('source/close_after_connect')
+    run_fake( "source/close_after_connect" )
     assert_no_control
   end
 
-  #   # This is disabled while CLIENT_MAX_WAIT_SECS is removed
-  #   def test_hello_goes_astray_causes_timeout_error
-  #     run_fake( "source/hang_after_hello" )
-  #     assert_no_control
-  #   end
+=begin
+  # This is disabled while CLIENT_MAX_WAIT_SECS is removed
+  def test_hello_goes_astray_causes_timeout_error
+    run_fake( "source/hang_after_hello" )
+    assert_no_control
+  end
+=end
 
   def test_sigterm_has_bad_exit_status
     @env.nbd1.can_die(1)
-    run_fake('source/sigterm_after_hello')
+    run_fake( "source/sigterm_after_hello" )
   end
 
   def test_disconnect_after_hello_causes_error_not_fatal
-    run_fake('source/close_after_hello')
+    run_fake( "source/close_after_hello" )
     assert_no_control
   end
 
+
   def test_partial_read_causes_error
-    run_fake('source/close_mid_read')
+    run_fake( "source/close_mid_read" )
   end
 
   def test_double_connect_during_hello
-    run_fake('source/connect_during_hello')
+    run_fake( "source/connect_during_hello" )
   end
 
+
   def test_acl_rejection
-    @env.acl1('127.0.0.1')
-    run_fake('source/connect_from_banned_ip')
+    @env.acl1("127.0.0.1")
+    run_fake( "source/connect_from_banned_ip")
   end
 
+
   def test_bad_write
-    run_fake('source/write_out_of_range')
+    run_fake( "source/write_out_of_range" )
   end
 
+
   def test_disconnect_before_write_data_causes_error
-    run_fake('source/close_after_write')
+    run_fake( "source/close_after_write" )
   end
 
+
   def test_disconnect_before_write_reply_causes_error
     # Note that this is an odd case: writing the reply doesn't fail.
     # The test passes because the next attempt by flexnbd to read a
     # request returns EOF.
-    run_fake('source/close_after_write_data')
+    run_fake( "source/close_after_write_data" )
   end
 
+
+
   def test_straight_migration
     @env.nbd1.can_die(0)
-    run_fake('source/successful_transfer')
+    run_fake( "source/successful_transfer" )
   end
 
-  private
 
+  private
   def run_fake( name )
     @env.run_fake( name, @env.ip, @env.port1 )
     assert @env.fake_reports_success, "#{name} failed."
   end
 
   def status
-    stat, = @env.status1
+    stat, _ = @env.status1
     stat
   end
 
   def assert_no_control
-    assert !status['has_control'], 'Thought it had control'
+    assert !status['has_control'],  "Thought it had control"
   end
 
   def assert_control
     assert status['has_control'], "Didn't think it had control"
   end
+
 end # class TestDestErrorHandling
+

tests/acceptance/test_happy_path.rb

@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 require 'test/unit'
 require 'environment'
 require 'flexnbd/constants'
@@ -17,18 +19,20 @@ class TestHappyPath < Test::Unit::TestCase
     @env.cleanup
   end
 
+
   def test_read1
-    @env.writefile1('f' * 64)
+    @env.writefile1("f"*64)
     @env.serve1
 
     [0, 12, 63].each do |num|
+
       assert_equal(
         bin( @env.nbd1.read(num*@env.blocksize, @env.blocksize) ),
         bin( @env.file1.read(num*@env.blocksize, @env.blocksize) )
       )
     end
 
-    [124, 1200, 10_028, 25_488].each do |num|
+    [124, 1200, 10028, 25488].each do |num|
       assert_equal(bin(@env.nbd1.read(num, 4)), bin(@env.file1.read(num, 4)))
     end
   end
@@ -36,11 +40,11 @@ class TestHappyPath < Test::Unit::TestCase
   # Check that we're not
   #
   def test_writeread1
-    @env.writefile1('0' * 64)
+    @env.writefile1("0"*64)
     @env.serve1
 
     [0, 12, 63].each do |num|
-      data = 'X' * @env.blocksize
+      data = "X"*@env.blocksize
       @env.nbd1.write(num*@env.blocksize, data)
       assert_equal(data, @env.file1.read(num*@env.blocksize, data.size))
       assert_equal(data, @env.nbd1.read(num*@env.blocksize, data.size))
@@ -51,11 +55,11 @@ class TestHappyPath < Test::Unit::TestCase
   # up.
   #
   def test_writeread2
-    @env.writefile1('0' * 1024)
+    @env.writefile1("0"*1024)
     @env.serve1
 
     d0 = "\0"*@env.blocksize
-    d1 = 'X' * @env.blocksize
+    d1 = "X"*@env.blocksize
     (0..63).each do |num|
       @env.nbd1.write(num*@env.blocksize*2, d1)
     end
@@ -64,18 +68,20 @@ class TestHappyPath < Test::Unit::TestCase
     end
   end
 
+
   def setup_to_mirror
-    @env.writefile1('f' * 4)
+    @env.writefile1( "f"*4 )
     @env.serve1
 
-    @env.writefile2('0' * 4)
+    @env.writefile2( "0"*4 )
     @env.listen2
   end
 
+
   def test_mirror
     @env.nbd1.can_die
     @env.nbd2.can_die(0)
-    setup_to_mirror
+    setup_to_mirror()
 
     stdout, stderr = @env.mirror12
 
@@ -83,15 +89,16 @@ class TestHappyPath < Test::Unit::TestCase
     @env.nbd2.join
 
     assert( File.file?( @env.filename1 ),
-           'The source file was incorrectly deleted')
+           "The source file was incorrectly deleted")
     assert_equal(@env.file1.read_original( 0, @env.blocksize ),
                  @env.file2.read( 0, @env.blocksize ) )
   end
 
+
   def test_mirror_unlink
     @env.nbd1.can_die(0)
     @env.nbd2.can_die(0)
-    setup_to_mirror
+    setup_to_mirror()
 
     assert File.file?( @env.filename1 )
 
@@ -99,40 +106,45 @@ class TestHappyPath < Test::Unit::TestCase
 
     assert_no_match( /unrecognized/, stderr )
 
-    Timeout.timeout(10) { @env.nbd1.join }
+
+    Timeout.timeout(10) do @env.nbd1.join end
 
     assert !File.file?( @env.filename1 )
   end
 
+
+
   def test_write_to_high_block
 		# 
 		# This test does not work on 32 bit platforms.
 		#
-    skip('Not relevant on 32-bit platforms') if ['a'].pack('p').size < 8
+		skip("Not relevant on 32-bit platforms") if ( ["a"].pack("p").size < 8 )
 
     # Create a large file, then try to write to somewhere after the 2G boundary
-    @env.truncate1 '4G'
+    @env.truncate1 "4G"
     @env.serve1
 
-    @env.nbd1.write(2**31 + 2**29, '12345678')
+    @env.nbd1.write( 2**31+2**29, "12345678" )
     sleep(1)
-    assert_equal '12345678', @env.nbd1.read(2**31 + 2**29, 8)
+    assert_equal "12345678", @env.nbd1.read( 2**31+2**29, 8 )
   end
 
+
   def test_set_acl
     # Just check that we get sane feedback here
-    @env.writefile1('f' * 4)
+    @env.writefile1( "f"*4 )
     @env.serve1
 
-    _, stderr = @env.acl1('127.0.0.1')
+    _,stderr = @env.acl1("127.0.0.1")
     assert_no_match( /^(F|E):/, stderr )
   end
 
+
   def test_write_more_than_one_run
     one_mb = 2**20
     data = "\0" * 256 * one_mb
 
-    File.open(@env.filename1, 'wb') { |f| f.write('1' * 256 * one_mb) }
+    File.open(@env.filename1, "wb") do |f| f.write( "1" * 256 * one_mb ) end
 
     @env.serve1
     sleep 5
@@ -141,15 +153,17 @@ class TestHappyPath < Test::Unit::TestCase
     @env.nbd1.kill
 
     i = 0
-    File.open(@env.filename1, 'rb') do |f|
+    File.open(@env.filename1, "rb") do |f|
       while mb = f.read( one_mb )
         unless "\0"*one_mb == mb
-          msg = format("Read non-zeros after offset %x:\n", (i * one_mb))
+          msg = "Read non-zeros after offset %x:\n"%(i * one_mb)
           msg += `hexdump #{@env.filename1} | head -n5`
-          raise msg
+          fail msg
         end
         i += 1
       end
     end
   end
+
 end
+

tests/acceptance/test_prefetch_proxy_mode.rb

@@ -2,6 +2,7 @@ require 'test/unit'
 require 'environment'
 require 'proxy_tests'
 
+
 class TestPrefetchProxyMode < Test::Unit::TestCase
   include ProxyTests
 
@@ -9,7 +10,7 @@ class TestPrefetchProxyMode < Test::Unit::TestCase
     super
     @env = Environment.new
     @env.prefetch_proxy!
-    @env.writefile1('f' * 16)
+    @env.writefile1( "f" * 16 )
   end
 
   def teardown
@@ -17,3 +18,5 @@ class TestPrefetchProxyMode < Test::Unit::TestCase
     super
   end
 end
+
+

tests/acceptance/test_proxy_mode.rb

@@ -2,13 +2,14 @@ require 'test/unit'
 require 'environment'
 require 'proxy_tests'
 
+
 class TestProxyMode < Test::Unit::TestCase
   include ProxyTests
 
   def setup
     super
     @env = Environment.new
-    @env.writefile1('f' * 16)
+    @env.writefile1( "f" * 16 )
   end
 
   def teardown
@@ -16,3 +17,4 @@ class TestProxyMode < Test::Unit::TestCase
     super
   end
 end
+

tests/acceptance/test_serve_mode.rb

@@ -1,15 +1,15 @@
 require 'test/unit'
 require 'environment'
 require 'flexnbd/fake_source'
-require 'ld_preload'
 
 class TestServeMode < Test::Unit::TestCase
-  include LdPreload
 
   def setup
     super
     @b = "\xFF".b
     @env = Environment.new
+    @env.writefile1( "0" )
+    @env.serve1
   end
 
   def teardown
@@ -18,44 +18,35 @@ class TestServeMode < Test::Unit::TestCase
   end
 
   def connect_to_server
-    @env.writefile1('0')
-    @env.serve1
-    client = FlexNBD::FakeSource.new(@env.ip, @env.port1, 'Connecting to server failed')
+    client = FlexNBD::FakeSource.new(@env.ip, @env.port1, "Connecting to server failed")
     begin
       result = client.read_hello
-      assert_equal 'NBDMAGIC', result[:passwd]
-      assert_equal 0x00420281861253, result[:magic]
+      assert_equal "NBDMAGIC", result[:magic]
       assert_equal @env.file1.size, result[:size]
-      # See src/common/nbdtypes.h for the various flags. At the moment we
-      # support HAS_FLAGS (1), SEND_FLUSH (4), SEND_FUA (8)
-      assert_equal (1 | 4 | 8), result[:flags]
-      assert_equal "\x0" * 124, result[:reserved]
       yield client
     ensure
-      begin
-        client.close
-      rescue StandardError
-        nil
-      end
+      client.close rescue nil
     end
   end
 
   def test_bad_request_magic_receives_error_response
     connect_to_server do |client|
+
       # replace REQUEST_MAGIC with all 0s to make it look bad
-      client.send_request(0, 'myhandle', 0, 0, "\x00\x00\x00\x00")
+      client.send_request( 0, "myhandle", 0, 0, "\x00\x00\x00\x00" )
       rsp = client.read_response
 
       assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-      assert_equal 'myhandle', rsp[:handle]
+      assert_equal "myhandle", rsp[:handle]
       assert rsp[:error] != 0, "Server sent success reply back: #{rsp[:error]}"
 
       # The client should be disconnected now
-      assert client.disconnected?, 'Server not disconnected'
+      assert client.disconnected?, "Server not disconnected"
     end
   end
 
   def test_long_write_on_top_of_short_write_is_respected
+
     connect_to_server do |client|
       # Start with a file of all-zeroes.
       client.write( 0, "\x00" * @env.file1.size )
@@ -77,15 +68,15 @@ class TestServeMode < Test::Unit::TestCase
     assert_equal @b * 2, @env.file1.read( 0, 2 )
   end
 
+
   def test_read_request_out_of_bounds_receives_error_response
     connect_to_server do |client|
       client.write_read_request( @env.file1.size, 4096 )
       rsp = client.read_response
 
       assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-      assert_equal 'myhandle', rsp[:handle]
-      # NBD protocol suggests ENOSPC (28) is returned
-      assert_equal 28, rsp[:error], 'Server sent incorrect response'
+      assert_equal "myhandle", rsp[:handle]
+      assert rsp[:error] != 0, "Server sent success reply back: #{rsp[:error]}"
 
       # Ensure we're not disconnected by sending a request. We don't care about
       # whether the reply is good or not, here.
@@ -101,9 +92,8 @@ class TestServeMode < Test::Unit::TestCase
       rsp = client.read_response
 
       assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-      assert_equal 'myhandle', rsp[:handle]
-      # NBD protocol suggests ENOSPC (28) is returned
-      assert_equal 28, rsp[:error], 'Server sent incorrect response'
+      assert_equal "myhandle", rsp[:handle]
+      assert rsp[:error] != 0, "Server sent success reply back: #{rsp[:error]}"
 
       # Ensure we're not disconnected by sending a request. We don't care about
       # whether the reply is good or not, here.
@@ -111,113 +101,10 @@ class TestServeMode < Test::Unit::TestCase
       rsp = client.read_response
       assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
     end
+
   end
 
-  def test_unknown_command_receives_error_response
-    connect_to_server do |client|
-      client.send_request(123)
-      rsp = client.read_response
 
-      assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-      assert_equal 'myhandle', rsp[:handle]
-      # NBD protocol suggests EINVAL (22) is returned
-      assert_equal 22, rsp[:error], 'Server sent incorrect response'
 
-      # Ensure we're not disconnected by sending a request. We don't care about
-      # whether the reply is good or not, here.
-      client.write(0, "\x00" * @env.file1.size)
-      rsp = client.read_response
-      assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-    end
 end
 
-  def test_flush_is_accepted
-    with_ld_preload('msync_logger') do
-      connect_to_server do |client|
-        client.flush
-        rsp = client.read_response
-        assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-        assert_equal 0, rsp[:error]
-      end
-      op = parse_ld_preload_logs('msync_logger')
-      assert_equal 1, op.count, 'Only one msync expected'
-      assert_equal @env.blocksize, op.first[2], 'msync length wrong'
-      assert_equal 6, op.first[3], 'msync called with incorrect flags'
-    end
-  end
-
-  def test_write_with_fua_is_accepted
-    with_ld_preload('msync_logger') do
-      page_size = Integer(`getconf PAGESIZE`)
-
-      @env.blocksize = page_size * 10
-      connect_to_server do |client|
-        # Write somewhere in the third page
-        pos = page_size * 3 + 100
-        client.write_with_fua(pos, "\x00" * 33)
-        rsp = client.read_response
-        assert_equal FlexNBD::REPLY_MAGIC, rsp[:magic]
-        assert_equal 0, rsp[:error]
-      end
-      op = parse_ld_preload_logs('msync_logger')
-
-      assert_equal 1, op.count, 'Only one msync expected'
-
-      # Should be 100 + 33, as we've started writing 100 bytes into a page, for
-      # 33 bytes
-      assert_equal 133, op.first[2], 'msync length wrong'
-      assert_equal 6, op.first[3], 'msync called with incorrect flags'
-    end
-  end
-
-  def test_odd_size_discs_are_truncated_to_nearest_512
-    # This should get rounded down to 1024
-    @env.blocksize = 1024 + 511
-    @env.writefile1('0')
-    @env.serve1
-    client = FlexNBD::FakeSource.new(@env.ip, @env.port1, 'Connecting to server failed')
-    begin
-      result = client.read_hello
-      assert_equal 'NBDMAGIC', result[:passwd]
-      assert_equal 0x00420281861253, result[:magic]
-      assert_equal 1024, result[:size]
-      client.close
-    end
-  end
-
-  def test_server_sets_tcpkeepalive
-    with_ld_preload('setsockopt_logger') do
-      connect_to_server(&:close)
-      op = read_ld_preload_log('setsockopt_logger')
-      assert_func_call(op,
-                       ['setsockopt', '\d+',
-                        Socket::SOL_SOCKET, Socket::SO_KEEPALIVE, 1, 0],
-                       'TCP Keepalive not successfully set')
-      assert_func_call(op,
-                       ['setsockopt', '\d+',
-                        Socket::SOL_TCP, Socket::TCP_KEEPIDLE, 30, 0],
-                       'TCP Keepalive idle timeout not set to 30s')
-      assert_func_call(op,
-                       ['setsockopt', '\d+',
-                        Socket::SOL_TCP, Socket::TCP_KEEPINTVL, 10, 0],
-                       'TCP keepalive retry time not set to 10s')
-      assert_func_call(op,
-                       ['setsockopt', '\d+',
-                        Socket::SOL_TCP, Socket::TCP_KEEPCNT, 3, 0],
-                       'TCP keepalive count not set to 3')
-    end
-  end
-
-  def test_status_returns_correct_client_count
-    @env.writefile1('0')
-    @env.serve1
-    assert_equal('0', @env.status1['num_clients'])
-    client = FlexNBD::FakeSource.new(@env.ip, @env.port1, 'Connecting to server failed')
-    assert_equal('1', @env.status1['num_clients'])
-    client2 = FlexNBD::FakeSource.new(@env.ip, @env.port1, 'Connecting to server failed')
-    assert_equal('2', @env.status1['num_clients'])
-    client2.close
-    client.close
-    assert_equal('0', @env.status1['num_clients'])
-  end
-end

tests/acceptance/test_source_error_handling.rb

@@ -1,105 +1,126 @@
+# encoding: utf-8
+
 require 'test/unit'
 require 'environment'
 
+
 class TestSourceErrorHandling < Test::Unit::TestCase
+
   def setup
     @old_env = ENV['FLEXNBD_MS_REQUEST_LIMIT_SECS']
-    ENV['FLEXNBD_MS_REQUEST_LIMIT_SECS'] = '4.0'
+    ENV['FLEXNBD_MS_REQUEST_LIMIT_SECS'] = "4.0"
 
     @env = Environment.new
-    @env.writefile1('f' * 4)
+    @env.writefile1( "f" * 4 )
     @env.serve1
   end
 
+
   def teardown
     @env.nbd1.can_die(0)
     @env.cleanup
     ENV['FLEXNBD_MS_REQUEST_LIMIT_SECS'] = @old_env
   end
 
+
   def expect_term_during_migration
     @env.nbd1.can_die(1,9)
   end
 
+
   def test_failure_to_connect_reported_in_mirror_cmd_response
     stdout, stderr = @env.mirror12_unchecked
     expect_term_during_migration
     assert_match( /failed to connect/, stderr )
   end
 
+
   def test_sigterm_after_hello_quits_with_status_of_1
     expect_term_during_migration
-    run_fake('dest/sigterm_after_hello')
+    run_fake( "dest/sigterm_after_hello" )
   end
 
+
   def test_destination_hangs_after_connect_reports_error_at_source
-    run_fake('dest/hang_after_connect',
-             err: /Remote server failed to respond/)
+    run_fake( "dest/hang_after_connect",
+              :err => /Remote server failed to respond/ )
   end
 
+
   def test_destination_rejects_connection_reports_error_at_source
-    run_fake('dest/reject_acl',
-             err: /Mirror was rejected/)
+    run_fake( "dest/reject_acl",
+              :err => /Mirror was rejected/ )
   end
 
+
   def test_wrong_size_causes_disconnect
-    run_fake('dest/hello_wrong_size',
-             err: /Remote size does not match local size/)
+    run_fake( "dest/hello_wrong_size",
+              :err => /Remote size does not match local size/ )
   end
 
+
   def test_wrong_magic_causes_disconnect
     expect_term_during_migration
-    run_fake('dest/hello_wrong_magic',
-             err: /Mirror was rejected/)
+    run_fake( "dest/hello_wrong_magic",
+              :err => /Mirror was rejected/ )
   end
 
+
   def test_disconnect_after_hello_causes_retry
     expect_term_during_migration
-    run_fake('dest/close_after_hello',
-             out: /Mirror started/)
+    run_fake( "dest/close_after_hello",
+              :out => /Mirror started/ )
   end
 
+
   def test_write_times_out_causes_retry
     expect_term_during_migration
-    run_fake('dest/hang_after_write')
+    run_fake( "dest/hang_after_write" )
   end
 
+
   def test_rejected_write_causes_retry
     expect_term_during_migration
-    run_fake('dest/error_on_write')
+    run_fake( "dest/error_on_write" )
   end
 
+
   def test_disconnect_before_write_reply_causes_retry
     expect_term_during_migration
-    run_fake('dest/close_after_write')
+    run_fake( "dest/close_after_write" )
   end
 
+
   def test_bad_write_reply_causes_retry
     expect_term_during_migration
-    run_fake('dest/write_wrong_magic')
+    run_fake( "dest/write_wrong_magic" )
   end
 
+
   def test_pre_entrust_disconnect_causes_retry
     expect_term_during_migration
-    run_fake('dest/close_after_writes')
+    run_fake( "dest/close_after_writes" )
   end
 
+
   def test_cancel_migration
-    run_fake('dest/break_after_hello')
+    run_fake( "dest/break_after_hello" )
   end
 
-  private
 
+  private
   def run_fake(name, opts = {})
     @env.run_fake( name, @env.ip, @env.port2, @env.nbd1.ctrl )
     stdout, stderr = @env.mirror12_unchecked
     assert_success
     assert_match( opts[:err], stderr ) if opts[:err]
     assert_match( opts[:out], stdout ) if opts[:out]
-    [stdout, stderr]
+    return stdout, stderr
   end
 
   def assert_success( msg=nil )
-    assert @env.fake_reports_success, msg || 'Fake failed'
+    assert @env.fake_reports_success, msg || "Fake failed"
   end
+
+
 end # class TestSourceErrorHandling

tests/acceptance/test_write_during_migration.rb

@@ -9,98 +9,102 @@ require 'tmpdir'
 Thread.abort_on_exception = true
 
 class TestWriteDuringMigration < Test::Unit::TestCase
-  def setup
-    @flexnbd = File.expand_path('../../build/flexnbd')
 
-    raise 'No binary!' unless File.executable?(@flexnbd)
+  def setup
+    @flexnbd = File.expand_path("../../build/flexnbd")
+
+    raise "No binary!" unless File.executable?( @flexnbd )
+
 
     @size = 20*1024*1024 # 20MB
-    @write_data = 'foo!' * 2048 # 8K write
+    @write_data = "foo!" * 2048 # 8K write
     @source_port = 9990
     @dest_port = 9991
-    @source_sock = 'src.sock'
-    @dest_sock = 'dst.sock'
-    @source_file = 'src.file'
-    @dest_file = 'dst.file'
+    @source_sock = "src.sock"
+    @dest_sock = "dst.sock"
+    @source_file = "src.file"
+    @dest_file = "dst.file"
   end
 
+
   def teardown
     [@dst_proc, @src_proc].each do |pid|
-      next unless pid
-      begin
-        Process.kill('KILL', pid)
-      rescue StandardError
-        nil
+      if pid
+        Process.kill( "KILL", pid ) rescue nil
       end
     end
   end
 
   def debug_arg
-    ENV['DEBUG'] ? '--verbose' : ''
+    ENV['DEBUG'] ? "--verbose" : ""
   end
 
+
   def launch_servers
-    @dst_proc = fork do
+    @dst_proc = fork() {
       cmd = "#{@flexnbd} listen -l 127.0.0.1 -p #{@dest_port} -f #{@dest_file} -s #{@dest_sock} #{debug_arg}"
       exec cmd
-    end
+    }
 
-    @src_proc = fork do
+    @src_proc = fork() {
       cmd = "#{@flexnbd} serve -l 127.0.0.1 -p #{@source_port} -f #{@source_file} -s #{@source_sock} #{debug_arg}"
       exec cmd
-    end
+    }
     begin
       awaiting = nil
       Timeout.timeout(10) do
         awaiting = :source
-        sleep 0.1 until File.exist?(@source_sock)
+        sleep 0.1 while !File.exists?( @source_sock )
         awaiting = :dest
-        sleep 0.1 until File.exist?(@dest_sock)
+        sleep 0.1 while !File.exists?( @dest_sock )
       end
     rescue Timeout::Error
       case awaiting
       when :source
-        raise "Couldn't get a source socket."
+        fail "Couldn't get a source socket."
       when :dest
-        raise "Couldn't get a destination socket."
+        fail "Couldn't get a destination socket."
       else
-        raise "Something went wrong I don't understand."
+        fail "Something went wrong I don't understand."
       end
     end
   end
 
-  def make_files
+
+  def make_files()
     FileUtils.touch(@source_file)
     File.truncate(@source_file, @size)
     FileUtils.touch(@dest_file)
     File.truncate(@dest_file, @size)
 
-    File.open(@source_file, 'wb') { |f| f.write 'a' * @size }
+    File.open(@source_file, "wb"){|f| f.write "a"*@size }
   end
 
+
   def start_mirror
-    UNIXSocket.open(@source_sock) do |sock|
-      sock.write(['mirror', '127.0.0.1', @dest_port.to_s, 'exit'].join("\x0A") + "\x0A\x0A")
+    UNIXSocket.open(@source_sock) {|sock|
+      sock.write(["mirror", "127.0.0.1", @dest_port.to_s, "exit"].join("\x0A") + "\x0A\x0A")
       sock.flush
       rsp = sock.readline
-    end
+    }
   end
 
-  def wait_for_quit
+
+  def wait_for_quit()
     Timeout.timeout( 10 ) do
       start_time =  Time.now
-      dst_result = Process.waitpid2(@dst_proc)
-      src_result = Process.waitpid2(@src_proc)
+      dst_result = Process::waitpid2(@dst_proc)
+      src_result = Process::waitpid2(@src_proc)
     end
   end
 
   def source_writer
-    client = FlexNBD::FakeSource.new('127.0.0.1', @source_port, 'Timed out connecting')
+    client = FlexNBD::FakeSource.new( "127.0.0.1", @source_port, "Timed out connecting" )
     offsets = Range.new(0, (@size - @write_data.size) / 4096 ).to_a
     loop do
       begin
         client.write(offsets[rand(offsets.size)] * 4096, @write_data)
-      rescue StandardError => err
+      rescue => err
         # We expect a broken write at some point, so ignore it
         break
       end
@@ -111,8 +115,8 @@ class TestWriteDuringMigration < Test::Unit::TestCase
     # puts `md5sum #{@source_file} #{@dest_file}`
 
     # Ensure each block matches
-    File.open(@source_file, 'r') do |source|
-      File.open(@dest_file, 'r') do |dest|
+    File.open(@source_file, "r") do |source|
+      File.open(@dest_file, "r") do |dest|
         0.upto( @size / 4096 ) do |block_num|
           s_data = source.read( 4096 )
           d_data = dest.read( 4096 )
@@ -127,16 +131,16 @@ class TestWriteDuringMigration < Test::Unit::TestCase
   end
 
   def test_write_during_migration
-    Dir.mktmpdir do |tmpdir|
+    Dir.mktmpdir() do |tmpdir|
       Dir.chdir( tmpdir ) do
-        make_files
+        make_files()
 
-        launch_servers
+        launch_servers()
 
         src_writer = Thread.new { source_writer }
 
-        start_mirror
-        wait_for_quit
+        start_mirror()
+        wait_for_quit()
         src_writer.join
         assert_both_sides_identical
       end
@@ -144,21 +148,24 @@ class TestWriteDuringMigration < Test::Unit::TestCase
   end
 
   def test_many_clients_during_migration
-    Dir.mktmpdir do |tmpdir|
+    Dir.mktmpdir() do |tmpdir|
       Dir.chdir( tmpdir ) do
-        make_files
+        make_files()
 
-        launch_servers
+        launch_servers()
 
         src_writers_1 = (1..5).collect { Thread.new { source_writer } }
 
-        start_mirror
+        start_mirror()
 
         src_writers_2 = (1..5).collect { Thread.new { source_writer } }
 
-        wait_for_quit
-        (src_writers_1 + src_writers_2).each(&:join)
+        wait_for_quit()
+        ( src_writers_1 + src_writers_2 ).each {|t| t.join }
         assert_both_sides_identical
       end
     end  end
+
+
 end
+

tests/unit/check_acl.c

@@ -13,6 +13,7 @@ START_TEST(test_null_acl)
 }
 END_TEST
 
+
 START_TEST( test_parses_single_line )
 {
 	char *lines[] = {"127.0.0.1"};
@@ -36,11 +37,9 @@ START_TEST(test_parses_multiple_lines)
 
 	struct ip_and_mask *entry;
 	entry = &(*acl->entries)[0];
-    fail_unless(entry->ip.family == e0.family,
-		"entry 0 has wrong family!");
+	fail_unless(entry->ip.family == e0.family, "entry 0 has wrong family!");
 	entry = &(*acl->entries)[1];
-    fail_unless(entry->ip.family == e1.family,
-		"entry 1 has wrong family!");
+	fail_unless(entry->ip.family == e1.family, "entry 1 has wrong family!");
 }
 END_TEST
 
@@ -53,6 +52,7 @@ START_TEST(test_destroy_doesnt_crash)
 }
 END_TEST
 
+
 START_TEST( test_includes_single_address )
 {
 	char *lines[] = {"127.0.0.1"};
@@ -109,13 +109,12 @@ START_TEST(test_includes_single_address_when_multiple_entries_exist)
 	parse_ip_to_sockaddr( &e0.generic, "127.0.0.1" );
 	parse_ip_to_sockaddr( &e1.generic, "::1" );
 
-    fail_unless(acl_includes(acl, &e0),
-		"Included address 0 wasn't covered");
-    fail_unless(acl_includes(acl, &e1),
-		"Included address 1 wasn't covered");
+	fail_unless( acl_includes( acl, &e0 ), "Included address 0 wasn't covered" );
+	fail_unless( acl_includes( acl, &e1 ), "Included address 1 wasn't covered" );
 }
 END_TEST
 
+
 START_TEST( test_doesnt_include_other_address )
 {
 	char *lines[] = {"127.0.0.1"};
@@ -164,6 +163,7 @@ START_TEST(test_default_deny_rejects)
 }
 END_TEST
 
+
 START_TEST( test_default_accept_rejects )
 {
 	struct acl * acl = acl_create( 0, NULL, 0 );
@@ -175,6 +175,7 @@ START_TEST(test_default_accept_rejects)
 }
 END_TEST
 
+
 Suite* acl_suite(void)
 {
 	Suite *s = suite_create("acl");
@@ -188,19 +189,14 @@ Suite * acl_suite(void)
 	tcase_add_test(tc_includes, test_parses_multiple_lines);
 
 	tcase_add_test(tc_includes, test_includes_single_address);
-    tcase_add_test(tc_includes,
-		   test_includes_single_address_when_netmask_specified_ipv4);
-    tcase_add_test(tc_includes,
-		   test_includes_single_address_when_netmask_specified_ipv6);
+	tcase_add_test(tc_includes, test_includes_single_address_when_netmask_specified_ipv4);
+	tcase_add_test(tc_includes, test_includes_single_address_when_netmask_specified_ipv6);
 
-    tcase_add_test(tc_includes,
-		   test_includes_single_address_when_multiple_entries_exist);
+	tcase_add_test(tc_includes, test_includes_single_address_when_multiple_entries_exist);
 
 	tcase_add_test(tc_includes, test_doesnt_include_other_address);
-    tcase_add_test(tc_includes,
-		   test_doesnt_include_other_address_when_netmask_specified);
-    tcase_add_test(tc_includes,
-		   test_doesnt_include_other_address_when_multiple_entries_exist);
+	tcase_add_test(tc_includes, test_doesnt_include_other_address_when_netmask_specified);
+	tcase_add_test(tc_includes, test_doesnt_include_other_address_when_multiple_entries_exist);
 
 	tcase_add_test(tc_includes, test_default_deny_rejects);
 	tcase_add_test(tc_includes, test_default_accept_rejects);
@@ -230,3 +226,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_bitset.c

@@ -66,18 +66,18 @@ START_TEST(test_bit_ranges)
 
 	for (i=0; i<64; i++) {
 		bit_set_range(buffer, i*64, i);
-	fail_unless(longs[i] == (1ULL << i) - 1,
+		fail_unless(
+			longs[i] == (1ULL<<i)-1,
 			"longs[%ld] = %lx SHOULD BE %lx",
-		    i, longs[i], (1ULL << i) - 1);
+			i, longs[i], (1ULL<<i)-1
+		);
 
-	fail_unless(longs[i + 1] == 0, "bit_set_range overshot at i=%d",
-		    i);
+		fail_unless(longs[i+1] == 0, "bit_set_range overshot at i=%d", i);
 	}
 
 	for (i=0; i<64; i++) {
 		bit_clear_range(buffer, i*64, i);
-	fail_unless(longs[i] == 0, "bit_clear_range didn't work at i=%d",
-		    i);
+		fail_unless(longs[i] == 0, "bit_clear_range didn't work at i=%d", i);
 	}
 }
 END_TEST
@@ -86,8 +86,7 @@ START_TEST(test_bit_runs)
 {
 	bitfield_word_t buffer[BIT_WORDS_FOR_SIZE(256)];
 	int i, ptr=0, runs[] = {
-	56, 97, 22, 12, 83, 1, 45, 80, 85, 51, 64, 40, 63, 67, 75, 64, 94,
-	    81, 79, 62
+		56,97,22,12,83,1,45,80,85,51,64,40,63,67,75,64,94,81,79,62
 	};
 
 	memset(buffer,0,256);
@@ -102,8 +101,11 @@ START_TEST(test_bit_runs)
 
 	for (i=0; i < 20; i += 1) {
 		int run = bit_run_count(buffer, ptr, 2048-ptr, NULL);
-	fail_unless(run == runs[i],
-		    "run %d should have been %d, was %d", i, runs[i], run);
+		fail_unless(
+			run == runs[i],
+			"run %d should have been %d, was %d",
+			i, runs[i], run
+		);
 		ptr += runs[i];
 	}
 }
@@ -143,6 +145,7 @@ START_TEST(test_bitset)
 }
 END_TEST
 
+
 START_TEST( test_bitset_set )
 {
 	struct bitset * map;
@@ -173,6 +176,7 @@ START_TEST(test_bitset_set)
 }
 END_TEST
 
+
 START_TEST( test_bitset_clear )
 {
 	struct bitset * map;
@@ -439,14 +443,10 @@ START_TEST(test_bitset_stream_queued_bytes)
 	bitset_clear_range( map, 0, 2 );
 	bitset_disable_stream( map );
 
-    ck_assert_int_eq(64,
-		     bitset_stream_queued_bytes(map, BITSET_STREAM_ON));
-    ck_assert_int_eq(80,
-		     bitset_stream_queued_bytes(map, BITSET_STREAM_SET));
-    ck_assert_int_eq(82,
-		     bitset_stream_queued_bytes(map, BITSET_STREAM_UNSET));
-    ck_assert_int_eq(64,
-		     bitset_stream_queued_bytes(map, BITSET_STREAM_OFF));
+	ck_assert_int_eq( 64, bitset_stream_queued_bytes( map, BITSET_STREAM_ON ) );
+	ck_assert_int_eq( 80, bitset_stream_queued_bytes( map, BITSET_STREAM_SET ) );
+	ck_assert_int_eq( 82, bitset_stream_queued_bytes( map, BITSET_STREAM_UNSET ) );
+	ck_assert_int_eq( 64, bitset_stream_queued_bytes( map, BITSET_STREAM_OFF ) );
 	bitset_free( map );
 }
 END_TEST
@@ -471,8 +471,7 @@ Suite * bitset_suite(void)
 	tcase_add_test(tc_bitset, test_bitset_set_range);
 	tcase_add_test(tc_bitset, test_bitset_clear_range);
 	tcase_add_test(tc_bitset, test_bitset_set_range_doesnt_push_to_stream);
-    tcase_add_test(tc_bitset,
-		   test_bitset_clear_range_doesnt_push_to_stream);
+	tcase_add_test(tc_bitset, test_bitset_clear_range_doesnt_push_to_stream);
 	suite_add_tcase(s, tc_bitset);
 
 
@@ -498,3 +497,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_client.c

@@ -10,7 +10,6 @@
 #include <unistd.h>
 
 struct server fake_server = {0};
-
 #define FAKE_SERVER &fake_server
 #define FAKE_SOCKET (42)
 
@@ -24,6 +23,7 @@ START_TEST(test_assigns_socket)
 }
 END_TEST
 
+
 START_TEST( test_assigns_server )
 {
 	struct client * c;
@@ -37,6 +37,7 @@ START_TEST(test_assigns_server)
 }
 END_TEST
 
+
 START_TEST( test_opens_stop_signal )
 {
 	struct client *c = client_create( FAKE_SERVER, FAKE_SOCKET );
@@ -49,6 +50,7 @@ START_TEST(test_opens_stop_signal)
 }
 END_TEST
 
+
 int fd_is_closed(int);
 
 START_TEST( test_closes_stop_signal )
@@ -64,6 +66,7 @@ START_TEST(test_closes_stop_signal)
 }
 END_TEST
 
+
 START_TEST( test_read_request_quits_on_stop_signal )
 {
 	int fds[2];
@@ -81,6 +84,7 @@ START_TEST(test_read_request_quits_on_stop_signal)
 }
 END_TEST
 
+
 Suite *client_suite(void)
 {
 	Suite *s = suite_create("client");
@@ -115,3 +119,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_control.c

@@ -15,6 +15,7 @@ START_TEST(test_assigns_sock_name)
 }
 END_TEST
 
+
 Suite *control_suite(void)
 {
 	Suite *s = suite_create("control");
@@ -38,3 +39,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_flexnbd.c

@@ -5,7 +5,8 @@
 
 START_TEST( test_listening_assigns_sock )
 {
-    struct flexnbd *flexnbd = flexnbd_create_listening("127.0.0.1",
+	struct flexnbd * flexnbd = flexnbd_create_listening(
+			"127.0.0.1",
 			"4777",
 			"fakefile",
 			"fakesock",
@@ -16,6 +17,7 @@ START_TEST(test_listening_assigns_sock)
 }
 END_TEST
 
+
 Suite *flexnbd_suite(void)
 {
 	Suite *s = suite_create("flexnbd");
@@ -39,3 +41,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_flexthread.c

@@ -12,23 +12,22 @@ START_TEST(test_mutex_create)
 }
 END_TEST
 
+
 START_TEST( test_mutex_lock )
 {
 	struct flexthread_mutex * ftm = flexthread_mutex_create();
 
-    fail_if(flexthread_mutex_held(ftm),
-	    "Flexthread_mutex is held before lock");
+	fail_if( flexthread_mutex_held( ftm ), "Flexthread_mutex is held before lock" );
 	flexthread_mutex_lock( ftm );
-    fail_unless(flexthread_mutex_held(ftm),
-		"Flexthread_mutex is not held inside lock");
+	fail_unless( flexthread_mutex_held( ftm ), "Flexthread_mutex is not held inside lock" );
 	flexthread_mutex_unlock( ftm );
-    fail_if(flexthread_mutex_held(ftm),
-	    "Flexthread_mutex is held after unlock");
+	fail_if( flexthread_mutex_held( ftm ), "Flexthread_mutex is held after unlock" );
 
 	flexthread_mutex_destroy( ftm );
 }
 END_TEST
 
+
 Suite* flexthread_suite(void)
 {
 	Suite *s = suite_create("flexthread");
@@ -60,3 +59,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_ioutil.c

@@ -17,6 +17,7 @@ START_TEST(test_read_until_newline_returns_line_length_plus_null)
 }
 END_TEST
 
+
 START_TEST( test_read_until_newline_inserts_null )
 {
 	int fds[2];
@@ -33,6 +34,7 @@ START_TEST(test_read_until_newline_inserts_null)
 }
 END_TEST
 
+
 START_TEST( test_read_empty_line_inserts_null )
 {
 	int fds[2];
@@ -48,6 +50,7 @@ START_TEST(test_read_empty_line_inserts_null)
 }
 END_TEST
 
+
 START_TEST( test_read_eof_returns_err )
 {
 	int fds[2];
@@ -62,6 +65,7 @@ START_TEST(test_read_eof_returns_err)
 }
 END_TEST
 
+
 START_TEST( test_read_eof_fills_line )
 {
 	int fds[2];
@@ -78,6 +82,7 @@ START_TEST(test_read_eof_fills_line)
 }
 END_TEST
 
+
 START_TEST( test_read_lines_until_blankline )
 {
 	char **lines = NULL;
@@ -93,25 +98,21 @@ START_TEST(test_read_lines_until_blankline)
 }
 END_TEST
 
+
 Suite *ioutil_suite(void)
 {
 	Suite *s = suite_create("ioutil");
 
 	TCase *tc_read_until_newline = tcase_create("read_until_newline");
-    TCase *tc_read_lines_until_blankline =
-	tcase_create("read_lines_until_blankline");
+	TCase *tc_read_lines_until_blankline = tcase_create("read_lines_until_blankline");
 
-    tcase_add_test(tc_read_until_newline,
-		   test_read_until_newline_returns_line_length_plus_null);
-    tcase_add_test(tc_read_until_newline,
-		   test_read_until_newline_inserts_null);
-    tcase_add_test(tc_read_until_newline,
-		   test_read_empty_line_inserts_null);
+	tcase_add_test(tc_read_until_newline, test_read_until_newline_returns_line_length_plus_null);
+	tcase_add_test(tc_read_until_newline, test_read_until_newline_inserts_null);
+	tcase_add_test(tc_read_until_newline, test_read_empty_line_inserts_null);
 	tcase_add_test(tc_read_until_newline, test_read_eof_returns_err);
 	tcase_add_test(tc_read_until_newline, test_read_eof_fills_line );
 
-    tcase_add_test(tc_read_lines_until_blankline,
-		   test_read_lines_until_blankline);
+	tcase_add_test(tc_read_lines_until_blankline, test_read_lines_until_blankline );
 
 	suite_add_tcase(s, tc_read_until_newline);
 	suite_add_tcase(s, tc_read_lines_until_blankline);
@@ -130,3 +131,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_mbox.c

@@ -14,11 +14,12 @@ START_TEST(test_allocs_cvar)
 	memset( &cond_zero, 'X', sizeof( cond_zero ) );
 	fail_if( memcmp( &cond_zero, &mbox->filled_cond, sizeof( cond_zero ) ) == 0 ,
 			"Condition variable not allocated" );
-    fail_if(memcmp(&cond_zero, &mbox->emptied_cond, sizeof(cond_zero)) ==
-	    0, "Condition variable not allocated");
+	fail_if( memcmp( &cond_zero, &mbox->emptied_cond, sizeof( cond_zero ) ) == 0 ,
+			"Condition variable not allocated" );
 }
 END_TEST
 
+
 START_TEST( test_post_stores_value )
 {
 	struct mbox * mbox = mbox_create();
@@ -31,6 +32,7 @@ START_TEST(test_post_stores_value)
 }
 END_TEST
 
+
 void * mbox_receive_runner( void * mbox_uncast )
 {
 	struct mbox * mbox = (struct mbox *)mbox_uncast;
@@ -56,12 +58,14 @@ START_TEST(test_receive_blocks_until_post)
 	mbox_post( mbox, deadbeef );
 	fail_unless( 0 == pthread_join( receiver, &retval ),
 			"Failed to join the receiver thread" );
-    fail_unless(retval == deadbeef, "Return value was wrong");
+	fail_unless( retval == deadbeef,
+			"Return value was wrong" );
 
 
 }
 END_TEST
 
+
 Suite* mbox_suite(void)
 {
 	Suite *s = suite_create("mbox");
@@ -97,3 +101,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_nbdtypes.c

@@ -13,13 +13,12 @@ START_TEST(test_init_passwd)
 	memset( init_raw.passwd, 0, 8 );
 	nbd_h2r_init( &init, &init_raw );
   
-    fail_unless(memcmp(init.passwd, INIT_PASSWD, 8) == 0,
-		"The password was not copied.");
-    fail_unless(memcmp(init_raw.passwd, INIT_PASSWD, 8) == 0,
-		"The password was not copied back.");
+	fail_unless( memcmp( init.passwd, INIT_PASSWD, 8 ) == 0, "The password was not copied." );
+	fail_unless( memcmp( init_raw.passwd, INIT_PASSWD, 8 ) == 0, "The password was not copied back." );
 }
 END_TEST
 
+
 START_TEST(test_init_magic)
 {
 	struct nbd_init_raw init_raw;
@@ -31,11 +30,11 @@ START_TEST(test_init_magic)
 
 	init.magic = 67890;
 	nbd_h2r_init( &init, &init_raw );
-    fail_unless(htobe64(67890) == init_raw.magic,
-		"Magic was not converted back.");
+	fail_unless( htobe64( 67890 ) == init_raw.magic, "Magic was not converted back." );
 }
 END_TEST
 
+
 START_TEST(test_init_size)
 {
 	struct nbd_init_raw init_raw;
@@ -47,11 +46,11 @@ START_TEST(test_init_size)
 
 	init.size = 67890;
 	nbd_h2r_init( &init, &init_raw );
-    fail_unless(htobe64(67890) == init_raw.size,
-		"Size was not converted back.");
+	fail_unless( htobe64( 67890 ) == init_raw.size, "Size was not converted back." );
 }
 END_TEST
 
+
 START_TEST(test_request_magic )
 {
 	struct nbd_request_raw request_raw;
@@ -59,13 +58,11 @@ START_TEST(test_request_magic)
 
 	request_raw.magic = 12345;
 	nbd_r2h_request( &request_raw, &request );
-    fail_unless(be32toh(12345) == request.magic,
-		"Magic was not converted.");
+	fail_unless( be32toh( 12345 ) == request.magic, "Magic was not converted." );
 
 	request.magic = 67890;
 	nbd_h2r_request( &request, &request_raw );
-    fail_unless(htobe32(67890) == request_raw.magic,
-		"Magic was not converted back.");
+	fail_unless( htobe32( 67890 ) == request_raw.magic, "Magic was not converted back." );
 }
 END_TEST
 
@@ -74,33 +71,17 @@ START_TEST(test_request_type)
 	struct nbd_request_raw request_raw;
 	struct nbd_request     request;
 
-    request_raw.type = 123;
+	request_raw.type = 12345;
 	nbd_r2h_request( &request_raw, &request );
-    fail_unless(be16toh(123) == request.type, "Type was not converted.");
+	fail_unless( be32toh( 12345 ) == request.type, "Type was not converted." );
 
-    request.type = 234;
+	request.type = 67890;
 	nbd_h2r_request( &request, &request_raw );
-    fail_unless(htobe16(234) == request_raw.type,
-		"Type was not converted back.");
+	fail_unless( htobe32( 67890 ) == request_raw.type, "Type was not converted back." );
 }
 END_TEST
 
-START_TEST(test_request_flags)
-{
-    struct nbd_request_raw request_raw;
-    struct nbd_request request;
 
-    request_raw.flags = 123;
-    nbd_r2h_request(&request_raw, &request);
-    fail_unless(be16toh(123) == request.flags,
-		"Flags were not converted.");
-
-    request.flags = 234;
-    nbd_h2r_request(&request, &request_raw);
-    fail_unless(htobe16(234) == request_raw.flags,
-		"Flags were not converted back.");
-}
-END_TEST
 
 START_TEST(test_request_handle)
 {
@@ -113,13 +94,13 @@ START_TEST(test_request_handle)
 	request_raw.handle.w = 0;
 	nbd_h2r_request( &request, &request_raw );
   
-    fail_unless(memcmp(request.handle.b, "MYHANDLE", 8) == 0,
-		"The handle was not copied.");
-    fail_unless(memcmp(request_raw.handle.b, "MYHANDLE", 8) == 0,
-		"The handle was not copied back.");
+	fail_unless( memcmp( request.handle.b, "MYHANDLE", 8 ) == 0, "The handle was not copied." );
+	fail_unless( memcmp( request_raw.handle.b, "MYHANDLE", 8 ) == 0, "The handle was not copied back." );
 }
 END_TEST
 
+
+
 START_TEST(test_request_from )
 {
 	struct nbd_request_raw request_raw;
@@ -131,11 +112,12 @@ START_TEST(test_request_from)
 
 	request.from = 67890;
 	nbd_h2r_request( &request, &request_raw );
-    fail_unless(htobe64(67890) == request_raw.from,
-		"From was not converted back.");
+	fail_unless( htobe64( 67890 ) == request_raw.from, "From was not converted back." );
 }
 END_TEST
 
+
+
 START_TEST(test_request_len )
 {
 	struct nbd_request_raw request_raw;
@@ -147,11 +129,11 @@ START_TEST(test_request_len)
 
 	request.len = 67890;
 	nbd_h2r_request( &request, &request_raw );
-    fail_unless(htobe32(67890) == request_raw.len,
-		"Type was not converted back.");
+	fail_unless( htobe32( 67890 ) == request_raw.len, "Type was not converted back." );
 }
 END_TEST
 
+
 START_TEST(test_reply_magic )
 {
 	struct nbd_reply_raw reply_raw;
@@ -163,11 +145,11 @@ START_TEST(test_reply_magic)
 
 	reply.magic = 67890;
 	nbd_h2r_reply( &reply, &reply_raw );
-    fail_unless(htobe32(67890) == reply_raw.magic,
-		"Magic was not converted back.");
+	fail_unless( htobe32( 67890 ) == reply_raw.magic, "Magic was not converted back." );
 }
 END_TEST
 
+
 START_TEST(test_reply_error )
 {
 	struct nbd_reply_raw reply_raw;
@@ -179,8 +161,7 @@ START_TEST(test_reply_error)
 
 	reply.error = 67890;
 	nbd_h2r_reply( &reply, &reply_raw );
-    fail_unless(htobe32(67890) == reply_raw.error,
-		"Error was not converted back.");
+	fail_unless( htobe32( 67890 ) == reply_raw.error, "Error was not converted back." );
 }
 END_TEST
 
@@ -195,13 +176,12 @@ START_TEST(test_reply_handle)
 	reply_raw.handle.w = 0;
 	nbd_h2r_reply( &reply, &reply_raw );
   
-    fail_unless(memcmp(reply.handle.b, "MYHANDLE", 8) == 0,
-		"The handle was not copied.");
-    fail_unless(memcmp(reply_raw.handle.b, "MYHANDLE", 8) == 0,
-		"The handle was not copied back.");
+	fail_unless( memcmp( reply.handle.b, "MYHANDLE", 8 ) == 0, "The handle was not copied." );
+	fail_unless( memcmp( reply_raw.handle.b, "MYHANDLE", 8 ) == 0, "The handle was not copied back." );
 }
 END_TEST
 
+
 START_TEST( test_convert_from )
 {
 	/* Check that we can correctly pull numbers out of an
@@ -233,7 +213,6 @@ Suite * nbdtypes_suite(void)
 	tcase_add_test( tc_init, test_init_size );
 	tcase_add_test( tc_request, test_request_magic );
 	tcase_add_test( tc_request, test_request_type );
-    tcase_add_test(tc_request, test_request_flags);
 	tcase_add_test( tc_request, test_request_handle );
 	tcase_add_test( tc_request, test_request_from );
 	tcase_add_test( tc_request, test_request_len );
@@ -261,3 +240,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_parse.c

@@ -13,6 +13,8 @@ START_TEST(test_can_parse_ip_address_twice)
 }
 END_TEST
 
+
+
 Suite* parse_suite(void)
 {
 	Suite *s = suite_create("parse");
@@ -42,3 +44,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_readwrite.c

@@ -54,7 +54,8 @@ void *responder(void *respond_uncast)
 		nbd_r2h_request( &request_raw, &resp->received);
 		if (resp->do_fail){
 			fd_write_reply( sock_fd, wrong_handle, 0 );
-	} else {
+		}
+		else {
 			fd_write_reply( sock_fd, resp->received.handle.w, 0 );
 		}
 		write( sock_fd, "12345678", 8 );
@@ -65,20 +66,17 @@ void *responder(void *respond_uncast)
 
 struct respond * respond_create( int do_fail )
 {
-    struct respond *respond =
-	(struct respond *) calloc(1, sizeof(struct respond));
+	struct respond * respond = (struct respond *)calloc( 1, sizeof( struct respond ) );
 	socketpair( PF_UNIX, SOCK_STREAM, 0, respond->sock_fds );
 	respond->do_fail = do_fail;
 
 	pthread_attr_init( &respond->thread_attr );
-    pthread_create(&respond->thread_id, &respond->thread_attr, responder,
-		   respond);
+	pthread_create( &respond->thread_id, &respond->thread_attr, responder, respond );
 
 	return respond;
 }
 
-void respond_destroy(struct respond *respond)
-{
+void respond_destroy( struct respond * respond ){
 	NULLCHECK( respond );
 
 	pthread_join( respond->thread_id, NULL );
@@ -123,6 +121,7 @@ START_TEST(test_rejects_mismatched_handle)
 }
 END_TEST
 
+
 START_TEST( test_accepts_matched_handle )
 {
 	struct respond * respond = respond_create( 0 );
@@ -136,6 +135,7 @@ START_TEST(test_accepts_matched_handle)
 }
 END_TEST
 
+
 START_TEST( test_disconnect_doesnt_read_reply )
 {
 	struct respond * respond = respond_create( 1 );
@@ -146,6 +146,7 @@ START_TEST(test_disconnect_doesnt_read_reply)
 }
 END_TEST
 
+
 Suite* readwrite_suite(void)
 {
 	Suite *s = suite_create("readwrite");
@@ -161,8 +162,7 @@ Suite * readwrite_suite(void)
 	 * because we want to know that the sender won't even try to
 	 * read the response.
 	 */
-    tcase_add_exit_test(tc_disconnect, test_disconnect_doesnt_read_reply,
-			0);
+	tcase_add_exit_test( tc_disconnect, test_disconnect_doesnt_read_reply,0 );
 
 	suite_add_tcase(s, tc_transfer);
 	suite_add_tcase(s, tc_disconnect);
@@ -190,3 +190,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_self_pipe.c

@@ -24,6 +24,7 @@ START_TEST(test_opens_pipe)
 }
 END_TEST
 
+
 void * signal_thread( void * thing )
 {
 	struct self_pipe *sig = (struct self_pipe *)thing;
@@ -62,14 +63,14 @@ START_TEST(test_signals)
 	}
 	self_pipe_signal_clear( sig );
 
-    fail_unless(self_pipe_fd_isset(sig, &fds),
-		"Signalled pipe was not FD_ISSET.");
+	fail_unless( self_pipe_fd_isset( sig, &fds ), "Signalled pipe was not FD_ISSET." );
 	pthread_join( signal_thread_id, NULL );
 
 	self_pipe_destroy( sig );
 }
 END_TEST
 
+
 START_TEST( test_clear_returns_immediately )
 {
 	struct self_pipe *sig;
@@ -78,6 +79,7 @@ START_TEST(test_clear_returns_immediately)
 }
 END_TEST
 
+
 START_TEST( test_destroy_closes_read_pipe )
 {
 	struct self_pipe* sig;
@@ -114,6 +116,7 @@ START_TEST(test_destroy_closes_read_pipe)
 }
 END_TEST
 
+
 START_TEST( test_destroy_closes_write_pipe )
 {
 	struct self_pipe * sig;
@@ -124,8 +127,7 @@ START_TEST(test_destroy_closes_write_pipe)
 	orig_write_fd = sig->write_fd;
 	self_pipe_destroy( sig );
 
-    while ((write_len = write(orig_write_fd, "", 0)) == -1
-	   && errno == EINTR);
+	while ( ( write_len = write( orig_write_fd, "", 0 ) ) == -1 && errno == EINTR );
 
 	switch( write_len ) {
 		case 0:
@@ -156,6 +158,8 @@ START_TEST(test_destroy_closes_write_pipe)
 }
 END_TEST
 
+
+
 Suite *self_pipe_suite(void)
 {
 	Suite *s = suite_create("self_pipe");
@@ -191,3 +195,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_serve.c

@@ -54,9 +54,7 @@ void setup(void)
 
 void teardown( void )
 {
-    if (dummy_file) {
-	unlink(dummy_file);
-    }
+	if( dummy_file ){ unlink( dummy_file ); }
 	free( dummy_file );
 	dummy_file = NULL;
 }
@@ -66,9 +64,7 @@ START_TEST(test_replaces_acl)
 {
 	struct flexnbd flexnbd;
 	flexnbd.signal_fd = -1;
-    struct server *s =
-	server_create(&flexnbd, "127.0.0.1", "0", dummy_file, 0, 0, NULL,
-		      1, 0, 1);
+	struct server * s = server_create( &flexnbd, "127.0.0.1", "0", dummy_file, 0, 0, NULL, 1, 0, 1 );
 	struct acl * new_acl = acl_create( 0, NULL, 0 );
 
 	server_replace_acl( s, new_acl );
@@ -78,13 +74,12 @@ START_TEST(test_replaces_acl)
 }
 END_TEST
 
+
 START_TEST( test_signals_acl_updated )
 {
 	struct flexnbd flexnbd;
 	flexnbd.signal_fd = -1;
-    struct server *s =
-	server_create(&flexnbd, "127.0.0.1", "0", dummy_file, 0, 0, NULL,
-		      1, 0, 1);
+	struct server * s = server_create( &flexnbd, "127.0.0.1", "0", dummy_file, 0, 0, NULL, 1, 0, 1 );
 	struct acl * new_acl = acl_create( 0, NULL, 0 );
 
 	server_replace_acl( s, new_acl );
@@ -95,6 +90,7 @@ START_TEST(test_signals_acl_updated)
 }
 END_TEST
 
+
 int connect_client( char *addr, int actual_port, char *source_addr )
 {
 	int client_fd = -1;
@@ -108,15 +104,12 @@ int connect_client(char *addr, int actual_port, char *source_addr)
 	memset( &hint, '\0', sizeof( struct addrinfo ) );
 	hint.ai_socktype = SOCK_STREAM;
 
-    myfail_if(getaddrinfo(addr, NULL, &hint, &ailist) != 0,
-	      "getaddrinfo failed.");
+	myfail_if( getaddrinfo( addr, NULL, &hint, &ailist ) != 0, "getaddrinfo failed." );
 
 	int connected = 0;
 	for( aip = ailist; aip; aip = aip->ai_next ) {
-	((struct sockaddr_in *) aip->ai_addr)->sin_port =
-	    htons(actual_port);
-	client_fd =
-	    socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
+		((struct sockaddr_in *)aip->ai_addr)->sin_port = htons( actual_port );
+		client_fd = socket( aip->ai_family, aip->ai_socktype, aip->ai_protocol );
 
 		if (source_addr) {
 			struct sockaddr src;
@@ -127,9 +120,7 @@ int connect_client(char *addr, int actual_port, char *source_addr)
 			bind(client_fd, &src,  sizeof(struct sockaddr_in6));
 		}
 
-	if (client_fd == -1) {
-	    continue;
-	}
+		if( client_fd == -1) { continue; }
 		if( connect( client_fd, aip->ai_addr, aip->ai_addrlen) == 0 ) {
 			connected = 1;
 			break;
@@ -157,9 +148,7 @@ START_TEST(test_acl_update_closes_bad_client)
 	 */
 	struct flexnbd flexnbd;
 	flexnbd.signal_fd = -1;
-    struct server *s =
-	server_create(&flexnbd, "127.0.0.7", "0", dummy_file, 0, 0, NULL,
-		      1, 0, 1);
+	struct server * s = server_create( &flexnbd, "127.0.0.7", "0", dummy_file, 0, 0, NULL, 1, 0, 1 );
 	struct acl * new_acl = acl_create( 0, NULL, 1 );
 	struct client * c;
 	struct client_tbl_entry * entry;
@@ -198,14 +187,13 @@ START_TEST(test_acl_update_closes_bad_client)
 }
 END_TEST
 
+
 START_TEST( test_acl_update_leaves_good_client )
 {
 	struct flexnbd flexnbd;
 	flexnbd.signal_fd = -1;
 
-    struct server *s =
-	server_create(&flexnbd, "127.0.0.7", "0", dummy_file, 0, 0, NULL,
-		      1, 0, 1);
+	struct server * s = server_create( &flexnbd, "127.0.0.7", "0", dummy_file, 0, 0, NULL, 1, 0, 1 );
 
 	char *lines[] = {"127.0.0.1"};
 	struct acl * new_acl = acl_create( 1, lines, 1 );
@@ -242,6 +230,7 @@ START_TEST(test_acl_update_leaves_good_client)
 }
 END_TEST
 
+
 Suite* serve_suite(void)
 {
 	Suite *s = suite_create("serve");
@@ -252,10 +241,8 @@ Suite * serve_suite(void)
 	tcase_add_test(tc_acl_update, test_replaces_acl);
 	tcase_add_test(tc_acl_update, test_signals_acl_updated);
 
-    tcase_add_exit_test(tc_acl_update, test_acl_update_closes_bad_client,
-			0);
-    tcase_add_exit_test(tc_acl_update, test_acl_update_leaves_good_client,
-			0);
+	tcase_add_exit_test(tc_acl_update, test_acl_update_closes_bad_client, 0);
+	tcase_add_exit_test(tc_acl_update, test_acl_update_leaves_good_client, 0);
 
 	suite_add_tcase(s, tc_acl_update);
 
@@ -274,3 +261,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_sockutil.c

@@ -24,6 +24,7 @@ START_TEST(test_sockaddr_address_string_af_inet_converts_to_string)
 }
 END_TEST
 
+
 START_TEST( test_sockaddr_address_string_af_inet6_converts_to_string )
 {
 	struct sockaddr_in6 v6_raw;
@@ -89,17 +90,12 @@ Suite * sockutil_suite(void)
 {
 	Suite *s = suite_create("sockutil");
 
-    TCase *tc_sockaddr_address_string =
-	tcase_create("sockaddr_address_string");
+	TCase *tc_sockaddr_address_string = tcase_create("sockaddr_address_string");
 
-    tcase_add_test(tc_sockaddr_address_string,
-		   test_sockaddr_address_string_af_inet_converts_to_string);
-    tcase_add_test(tc_sockaddr_address_string,
-		   test_sockaddr_address_string_af_inet6_converts_to_string);
-    tcase_add_test(tc_sockaddr_address_string,
-		   test_sockaddr_address_string_af_unspec_is_failure);
-    tcase_add_test(tc_sockaddr_address_string,
-		   test_sockaddr_address_string_doesnt_overflow_short_buffer);
+	tcase_add_test(tc_sockaddr_address_string, test_sockaddr_address_string_af_inet_converts_to_string);
+	tcase_add_test(tc_sockaddr_address_string, test_sockaddr_address_string_af_inet6_converts_to_string);
+    tcase_add_test(tc_sockaddr_address_string, test_sockaddr_address_string_af_unspec_is_failure);
+	tcase_add_test(tc_sockaddr_address_string, test_sockaddr_address_string_doesnt_overflow_short_buffer);
 	suite_add_tcase(s, tc_sockaddr_address_string);
 
 	return s;
@@ -116,3 +112,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+

tests/unit/check_status.c

@@ -68,6 +68,7 @@ START_TEST(test_gets_has_control)
 }
 END_TEST
 
+
 START_TEST( test_gets_is_mirroring )
 {
 	struct server * server = mock_server();
@@ -104,6 +105,25 @@ START_TEST(test_gets_clients_allowed)
 }
 END_TEST
 
+START_TEST( test_gets_num_clients )
+{
+	struct server * server = mock_server();
+	struct status * status = status_create( server );
+
+	fail_if( status->num_clients != 0, "num_clients was wrong" );
+	status_destroy( status );
+
+	server->nbd_client[0].thread = 1;
+	server->nbd_client[1].thread = 1;
+	status = status_create( server );
+
+	fail_unless( status->num_clients == 2, "num_clients was wrong" );
+	status_destroy( status );
+	destroy_mock_server( server );
+
+}
+END_TEST
+
 START_TEST( test_gets_pid )
 {
 	struct server * server = mock_server();
@@ -142,31 +162,34 @@ START_TEST(test_gets_migration_statistics)
 
 	struct status * status = status_create( server );
 
-    fail_unless(0 == status->migration_duration ||
+	fail_unless (
+		0 == status->migration_duration ||
 		1 == status->migration_duration ||
 		2 == status->migration_duration,
-		"migration_duration is unreasonable!");
+		"migration_duration is unreasonable!"
+	);
 
-    fail_unless(16384 / (status->migration_duration + 1) ==
-		status->migration_speed,
-		"migration_speed not calculated correctly");
+	fail_unless(
+		16384 / ( status->migration_duration + 1 ) == status->migration_speed,
+		"migration_speed not calculated correctly"
+	);
 
-    fail_unless(32768 == status->migration_speed_limit,
-		"migration_speed_limit not read");
+	fail_unless( 32768 == status->migration_speed_limit, "migration_speed_limit not read" );
 
 	// ( size / current_bps ) + 1 happens to be 3 for this test
-    fail_unless(3 == status->migration_seconds_left,
-		"migration_seconds_left not gathered");
+	fail_unless( 3 == status->migration_seconds_left, "migration_seconds_left not gathered" );
 
 	status_destroy( status );
 	destroy_mock_server( server );
 }
-
 END_TEST
+
+
 #define RENDER_TEST_SETUP \
 	struct status status; \
 	int fds[2];           \
 	pipe( fds );
+
 void fail_unless_rendered( int fd, char *fragment )
 {
 	char buf[1024] = {0};
@@ -199,7 +222,9 @@ void fail_if_rendered(int fd, char *fragment)
 
 START_TEST( test_renders_has_control )
 {
-    RENDER_TEST_SETUP status.has_control = 1;
+	RENDER_TEST_SETUP
+
+	status.has_control = 1;
 	status_write( &status, fds[1] );
 	fail_unless_rendered( fds[0], "has_control=true" );
 
@@ -209,9 +234,12 @@ START_TEST(test_renders_has_control)
 }
 END_TEST
 
+
 START_TEST( test_renders_is_mirroring )
 {
-    RENDER_TEST_SETUP status.is_mirroring = 1;
+	RENDER_TEST_SETUP
+
+	status.is_mirroring = 1;
 	status_write( &status, fds[1] );
 	fail_unless_rendered( fds[0], "is_mirroring=true" );
 
@@ -223,7 +251,9 @@ END_TEST
 
 START_TEST( test_renders_clients_allowed )
 {
-    RENDER_TEST_SETUP status.clients_allowed = 1;
+	RENDER_TEST_SETUP
+
+	status.clients_allowed = 1;
 	status_write( &status, fds[1] );
 	fail_unless_rendered( fds[0], "clients_allowed=true" );
 
@@ -235,7 +265,9 @@ END_TEST
 
 START_TEST( test_renders_num_clients )
 {
-    RENDER_TEST_SETUP status.num_clients = 0;
+	RENDER_TEST_SETUP
+
+	status.num_clients = 0;
 	status_write( &status, fds[1] );
 	fail_unless_rendered( fds[0], "num_clients=0" );
 
@@ -246,9 +278,12 @@ START_TEST(test_renders_num_clients)
 }
 END_TEST
 
+
 START_TEST( test_renders_pid )
 {
-    RENDER_TEST_SETUP status.pid = 42;
+	RENDER_TEST_SETUP
+
+	status.pid = 42;
 	status_write( &status, fds[1] );
 	fail_unless_rendered( fds[0], "pid=42" );
 }
@@ -256,7 +291,9 @@ END_TEST
 
 START_TEST( test_renders_size )
 {
-    RENDER_TEST_SETUP status.size = ((uint64_t) 1 << 33);
+	RENDER_TEST_SETUP
+
+	status.size = ( (uint64_t)1 << 33 );
 	status_write( &status, fds[1] );
 	fail_unless_rendered( fds[0], "size=8589934592" );
 }
@@ -264,7 +301,9 @@ END_TEST
 
 START_TEST( test_renders_migration_statistics )
 {
-    RENDER_TEST_SETUP status.is_mirroring = 0;
+	RENDER_TEST_SETUP
+
+	status.is_mirroring = 0;
 	status.migration_duration = 8;
 	status.migration_speed = 40000000;
 	status.migration_speed_limit = 40000001;
@@ -307,6 +346,7 @@ START_TEST(test_renders_migration_statistics)
 }
 END_TEST
 
+
 Suite *status_suite(void)
 {
 	Suite *s = suite_create("status");
@@ -317,6 +357,7 @@ Suite * status_suite(void)
 	tcase_add_test(tc_create, test_gets_has_control);
 	tcase_add_test(tc_create, test_gets_is_mirroring);
 	tcase_add_test(tc_create, test_gets_clients_allowed);
+	tcase_add_test(tc_create, test_gets_num_clients);
 	tcase_add_test(tc_create, test_gets_pid);
 	tcase_add_test(tc_create, test_gets_size);
 	tcase_add_test(tc_create, test_gets_migration_statistics);
@@ -347,3 +388,4 @@ int main(void)
 	srunner_free(sr);
 	return (number_failed == 0) ? 0 : 1;
 }
+