bytemark/flexnbd-c
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Tidy comments

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This commit is contained in:
Patrick J Cherry
2018-02-02 16:17:01 +00:00
parent f37e4438c8
commit ad001cb83c
1 changed files with 14 additions and 12 deletions
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24
src/common/nbdtypes.h
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@@ -15,22 +15,24 @@
#define REQUEST_TRIM 4
#define REQUEST_WRITE_ZEROES 6
#define FLAG_HAS_FLAGS (1 << 0)
#define FLAG_READ_ONLY (1 << 1)
#define FLAG_SEND_FLUSH (1 << 2)
#define FLAG_SEND_FUA (1 << 3)
#define FLAG_ROTATIONAL (1 << 4)
#define FLAG_SEND_TRIM (1 << 5)
#define FLAG_SEND_WRITE_ZEROES (1 << 6)
/* values for flags 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) */
/* Not yet implemented by flexnbd */
#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_FUA (1 << 0)
#define CMD_FLAG_NO_HOLE (1 << 1)
/* The top 2 bytes of the type field are overloaded and can contain flags */
// #define REQUEST_MASK 0x0000ffff
/* 1MiB is the de-facto standard for maximum size of header + data */
/* 32 MiB is the maximum qemu will send you:
* https://github.com/qemu/qemu/blob/v2.11.0/include/block/nbd.h#L183
*/
#define NBD_MAX_SIZE ( 32 * 1024 * 1024 )
#define NBD_REQUEST_SIZE ( sizeof( struct nbd_request_raw ) )