Keep all connection code in one file, to be able to implement reconnect
in further patches.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/nbd-client.h | 2 +-
block/nbd-client.c | 37 +++++++++++++++++++++++++++++++++++--
block/nbd.c | 40 ++--------------------------------------
3 files changed, 38 insertions(+), 41 deletions(-)
diff --git a/block/nbd-client.h b/block/nbd-client.h
index cfc90550b9..2f047ba614 100644
--- a/block/nbd-client.h
+++ b/block/nbd-client.h
@@ -41,7 +41,7 @@ typedef struct NBDClientSession {
NBDClientSession *nbd_get_client_session(BlockDriverState *bs);
int nbd_client_init(BlockDriverState *bs,
- QIOChannelSocket *sock,
+ SocketAddress *saddr,
const char *export_name,
QCryptoTLSCreds *tlscreds,
const char *hostname,
diff --git a/block/nbd-client.c b/block/nbd-client.c
index 1efc3d36cc..a0d8f2523e 100644
--- a/block/nbd-client.c
+++ b/block/nbd-client.c
@@ -976,8 +976,31 @@ void nbd_client_close(BlockDriverState *bs)
nbd_teardown_connection(bs);
}
+static QIOChannelSocket *nbd_establish_connection(SocketAddress *saddr,
+ Error **errp)
+{
+ QIOChannelSocket *sioc;
+ Error *local_err = NULL;
+
+ sioc = qio_channel_socket_new();
+ qio_channel_set_name(QIO_CHANNEL(sioc), "nbd-client");
+
+ qio_channel_socket_connect_sync(sioc,
+ saddr,
+ &local_err);
+ if (local_err) {
+ object_unref(OBJECT(sioc));
+ error_propagate(errp, local_err);
+ return NULL;
+ }
+
+ qio_channel_set_delay(QIO_CHANNEL(sioc), false);
+
+ return sioc;
+}
+
int nbd_client_init(BlockDriverState *bs,
- QIOChannelSocket *sioc,
+ SocketAddress *saddr,
const char *export,
QCryptoTLSCreds *tlscreds,
const char *hostname,
@@ -987,6 +1010,15 @@ int nbd_client_init(BlockDriverState *bs,
NBDClientSession *client = nbd_get_client_session(bs);
int ret;
+ /* establish TCP connection, return error if it fails
+ * TODO: Configurable retry-until-timeout behaviour.
+ */
+ QIOChannelSocket *sioc = nbd_establish_connection(saddr, errp);
+
+ if (!sioc) {
+ return -ECONNREFUSED;
+ }
+
/* NBD handshake */
logout("session init %s\n", export);
qio_channel_set_blocking(QIO_CHANNEL(sioc), true, NULL);
@@ -1001,12 +1033,14 @@ int nbd_client_init(BlockDriverState *bs,
g_free(client->info.x_dirty_bitmap);
if (ret < 0) {
logout("Failed to negotiate with the NBD server\n");
+ object_unref(OBJECT(sioc));
return ret;
}
if (client->info.flags & NBD_FLAG_READ_ONLY &&
!bdrv_is_read_only(bs)) {
error_setg(errp,
"request for write access conflicts with read-only export");
+ object_unref(OBJECT(sioc));
return -EACCES;
}
if (client->info.flags & NBD_FLAG_SEND_FUA) {
@@ -1020,7 +1054,6 @@ int nbd_client_init(BlockDriverState *bs,
qemu_co_mutex_init(&client->send_mutex);
qemu_co_queue_init(&client->free_sema);
client->sioc = sioc;
- object_ref(OBJECT(client->sioc));
if (!client->ioc) {
client->ioc = QIO_CHANNEL(sioc);
diff --git a/block/nbd.c b/block/nbd.c
index e87699fb73..9db5eded89 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -295,30 +295,6 @@ NBDClientSession *nbd_get_client_session(BlockDriverState *bs)
return &s->client;
}
-static QIOChannelSocket *nbd_establish_connection(SocketAddress *saddr,
- Error **errp)
-{
- QIOChannelSocket *sioc;
- Error *local_err = NULL;
-
- sioc = qio_channel_socket_new();
- qio_channel_set_name(QIO_CHANNEL(sioc), "nbd-client");
-
- qio_channel_socket_connect_sync(sioc,
- saddr,
- &local_err);
- if (local_err) {
- object_unref(OBJECT(sioc));
- error_propagate(errp, local_err);
- return NULL;
- }
-
- qio_channel_set_delay(QIO_CHANNEL(sioc), false);
-
- return sioc;
-}
-
-
static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp)
{
Object *obj;
@@ -394,7 +370,6 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
BDRVNBDState *s = bs->opaque;
QemuOpts *opts = NULL;
Error *local_err = NULL;
- QIOChannelSocket *sioc = NULL;
QCryptoTLSCreds *tlscreds = NULL;
const char *hostname = NULL;
int ret = -EINVAL;
@@ -434,22 +409,11 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
hostname = s->saddr->u.inet.host;
}
- /* establish TCP connection, return error if it fails
- * TODO: Configurable retry-until-timeout behaviour.
- */
- sioc = nbd_establish_connection(s->saddr, errp);
- if (!sioc) {
- ret = -ECONNREFUSED;
- goto error;
- }
-
/* NBD handshake */
- ret = nbd_client_init(bs, sioc, s->export, tlscreds, hostname,
+ ret = nbd_client_init(bs, s->saddr, s->export, tlscreds, hostname,
qemu_opt_get(opts, "x-dirty-bitmap"), errp);
+
error:
- if (sioc) {
- object_unref(OBJECT(sioc));
- }
if (tlscreds) {
object_unref(OBJECT(tlscreds));
}
--
2.11.1