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authorPaolo Bonzini <pbonzini@redhat.com>2012-08-22 15:30:31 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2012-09-19 15:26:13 +0200
commit9a304d29a79a3daeeaf15c68d7439713037405b1 (patch)
tree5bedb39d843a1e49944cd180dea7802bebceba39 /nbd.c
parentfa26c26b078b298a18686adb06a38bea3cdee990 (diff)
downloadqemu-arm-9a304d29a79a3daeeaf15c68d7439713037405b1.tar.gz
nbd: pass NBDClient to nbd_send_negotiate
We will need the NBDClient in nbd_send_negotiate to store the export requested by the client. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'nbd.c')
-rw-r--r--nbd.c78
1 files changed, 41 insertions, 37 deletions
diff --git a/nbd.c b/nbd.c
index 8201b7a392..5a3088d232 100644
--- a/nbd.c
+++ b/nbd.c
@@ -78,6 +78,39 @@
#define NBD_OPT_EXPORT_NAME (1 << 0)
+/* Definitions for opaque data types */
+
+typedef struct NBDRequest NBDRequest;
+
+struct NBDRequest {
+ QSIMPLEQ_ENTRY(NBDRequest) entry;
+ NBDClient *client;
+ uint8_t *data;
+};
+
+struct NBDExport {
+ BlockDriverState *bs;
+ off_t dev_offset;
+ off_t size;
+ uint32_t nbdflags;
+ QSIMPLEQ_HEAD(, NBDRequest) requests;
+};
+
+struct NBDClient {
+ int refcount;
+ void (*close)(NBDClient *client);
+
+ NBDExport *exp;
+ int sock;
+
+ Coroutine *recv_coroutine;
+
+ CoMutex send_lock;
+ Coroutine *send_coroutine;
+
+ int nb_requests;
+};
+
/* That's all folks */
ssize_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read)
@@ -209,8 +242,9 @@ int unix_socket_outgoing(const char *path)
Request (type == 2)
*/
-static int nbd_send_negotiate(int csock, off_t size, uint32_t flags)
+static int nbd_send_negotiate(NBDClient *client)
{
+ int csock = client->sock;
char buf[8 + 8 + 8 + 128];
int rc;
@@ -228,9 +262,9 @@ static int nbd_send_negotiate(int csock, off_t size, uint32_t flags)
TRACE("Beginning negotiation.");
memcpy(buf, "NBDMAGIC", 8);
cpu_to_be64w((uint64_t*)(buf + 8), NBD_CLIENT_MAGIC);
- cpu_to_be64w((uint64_t*)(buf + 16), size);
+ cpu_to_be64w((uint64_t*)(buf + 16), client->exp->size);
cpu_to_be32w((uint32_t*)(buf + 24),
- flags | NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_TRIM |
+ client->exp->nbdflags | NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_TRIM |
NBD_FLAG_SEND_FLUSH | NBD_FLAG_SEND_FUA);
memset(buf + 28, 0, 124);
@@ -613,37 +647,6 @@ static ssize_t nbd_send_reply(int csock, struct nbd_reply *reply)
#define MAX_NBD_REQUESTS 16
-typedef struct NBDRequest NBDRequest;
-
-struct NBDRequest {
- QSIMPLEQ_ENTRY(NBDRequest) entry;
- NBDClient *client;
- uint8_t *data;
-};
-
-struct NBDExport {
- BlockDriverState *bs;
- off_t dev_offset;
- off_t size;
- uint32_t nbdflags;
- QSIMPLEQ_HEAD(, NBDRequest) requests;
-};
-
-struct NBDClient {
- int refcount;
- void (*close)(NBDClient *client);
-
- NBDExport *exp;
- int sock;
-
- Coroutine *recv_coroutine;
-
- CoMutex send_lock;
- Coroutine *send_coroutine;
-
- int nb_requests;
-};
-
static void nbd_client_get(NBDClient *client)
{
client->refcount++;
@@ -977,13 +980,14 @@ NBDClient *nbd_client_new(NBDExport *exp, int csock,
void (*close)(NBDClient *))
{
NBDClient *client;
- if (nbd_send_negotiate(csock, exp->size, exp->nbdflags) < 0) {
- return NULL;
- }
client = g_malloc0(sizeof(NBDClient));
client->refcount = 1;
client->exp = exp;
client->sock = csock;
+ if (nbd_send_negotiate(client) < 0) {
+ g_free(client);
+ return NULL;
+ }
client->close = close;
qemu_co_mutex_init(&client->send_lock);
qemu_set_fd_handler2(csock, nbd_can_read, nbd_read, NULL, client);