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Added dummy control socket answering / changed serve_accept_loop to use

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select() to avoid a separate listening thread.
This commit is contained in:
Matthew Bloch
2012-05-18 23:39:16 +01:00
parent b533e4e31c
commit 580b821f61
2 changed files with 59 additions and 26 deletions
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83
serve.c
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@@ -342,7 +342,7 @@ void serve_open_control_socket(struct mode_serve_params* params)
if (!params->control_socket_name)
return;
params->control = socket(AF_UNIX, SOCK_DGRAM, 0);
params->control = socket(AF_UNIX, SOCK_STREAM, 0);
SERVER_ERROR_ON_FAILURE(params->control,
"Couldn't create control socket");
@@ -350,45 +350,78 @@ void serve_open_control_socket(struct mode_serve_params* params)
bind_address.sun_family = AF_UNIX;
strcpy(bind_address.sun_path, params->control_socket_name);
unlink(params->control_socket_name); /* ignore failure */
SERVER_ERROR_ON_FAILURE(
bind(params->control, &bind_address, sizeof(bind_address)),
"Couldn't bind control socket to %s",
params->control_socket_name
);
SERVER_ERROR_ON_FAILURE(
listen(params->control, 5),
"Couldn't listen on control socket"
);
}
void accept_nbd_client(struct mode_serve_params* params, int client_fd, struct sockaddr* client_address)
{
pthread_t client_thread;
struct client_params* client_params;
if (params->acl &&
!is_included_in_acl(params->acl_entries, params->acl, client_address)) {
write(client_fd, "Access control error", 20);
close(client_fd);
return;
}
client_params = xmalloc(sizeof(struct client_params));
client_params->socket = client_fd;
client_params->filename = params->filename;
client_params->block_allocation_map =
params->block_allocation_map;
client_thread = pthread_create(&client_thread, NULL,
client_serve, client_params);
SERVER_ERROR_ON_FAILURE(client_thread,
"Failed to create client thread");
/* FIXME: keep track of them? */
/* FIXME: maybe shouldn't be fatal? */
}
void accept_control_connection(struct mode_serve_params* params, int client_fd, struct sockaddr* client_address)
{
write(client_fd, "hello", 5);
close(client_fd);
}
void serve_accept_loop(struct mode_serve_params* params)
{
while (1) {
pthread_t client_thread;
int activity_fd, client_fd;
struct sockaddr client_address;
struct client_params* client_params;
socklen_t socket_length=0;
fd_set fds;
socklen_t socklen=0;
int client_socket = accept(params->server, &client_address,
&socket_length);
SERVER_ERROR_ON_FAILURE(client_socket, "accept() failed");
FD_ZERO(&fds);
FD_SET(params->server, &fds);
FD_SET(params->control, &fds);
if (params->acl &&
!is_included_in_acl(params->acl_entries, params->acl, &client_address)) {
write(client_socket, "Access control error", 20);
close(client_socket);
continue;
}
SERVER_ERROR_ON_FAILURE(
select(FD_SETSIZE, &fds, NULL, NULL, NULL),
"select() failed"
);
client_params = xmalloc(sizeof(struct client_params));
client_params->socket = client_socket;
client_params->filename = params->filename;
client_params->block_allocation_map =
params->block_allocation_map;
activity_fd = FD_ISSET(params->server, &fds) ? params->server :
params->control;
client_fd = accept(activity_fd, &client_address, &socklen);
SERVER_ERROR_ON_FAILURE(client_fd, "accept() failed");
client_thread = pthread_create(&client_thread, NULL,
client_serve, client_params);
SERVER_ERROR_ON_FAILURE(client_thread,
"Failed to create client thread");
/* FIXME: keep track of them? */
/* FIXME: maybe shouldn't be fatal? */
if (activity_fd == params->server)
accept_nbd_client(params, client_fd, &client_address);
if (activity_fd == params->control)
accept_control_connection(params, client_fd, &client_address);
}
}