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[PULL 30/34] block/nbd: split nbd_co_do_establish_connection out of nbd_
From: |
Eric Blake |
Subject: |
[PULL 30/34] block/nbd: split nbd_co_do_establish_connection out of nbd_reconnect_attempt |
Date: |
Tue, 15 Jun 2021 15:47:52 -0500 |
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Split out the part that we want to reuse for nbd_open().
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210610100802.5888-29-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
block/nbd.c | 82 ++++++++++++++++++++++++++++-------------------------
1 file changed, 43 insertions(+), 39 deletions(-)
diff --git a/block/nbd.c b/block/nbd.c
index 411435c1559e..8caeafc8d351 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -356,11 +356,50 @@ static int nbd_handle_updated_info(BlockDriverState *bs,
Error **errp)
return 0;
}
+static int coroutine_fn nbd_co_do_establish_connection(BlockDriverState *bs,
+ Error **errp)
+{
+ BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
+ int ret;
+
+ assert(!s->ioc);
+
+ s->ioc = nbd_co_establish_connection(s->conn, &s->info, errp);
+ if (!s->ioc) {
+ return -ECONNREFUSED;
+ }
+
+ ret = nbd_handle_updated_info(s->bs, NULL);
+ if (ret < 0) {
+ /*
+ * We have connected, but must fail for other reasons.
+ * Send NBD_CMD_DISC as a courtesy to the server.
+ */
+ NBDRequest request = { .type = NBD_CMD_DISC };
+
+ nbd_send_request(s->ioc, &request);
+
+ object_unref(OBJECT(s->ioc));
+ s->ioc = NULL;
+
+ return ret;
+ }
+
+ qio_channel_set_blocking(s->ioc, false, NULL);
+ qio_channel_attach_aio_context(s->ioc, bdrv_get_aio_context(bs));
+
+ yank_register_function(BLOCKDEV_YANK_INSTANCE(s->bs->node_name), nbd_yank,
+ bs);
+
+ /* successfully connected */
+ s->state = NBD_CLIENT_CONNECTED;
+ qemu_co_queue_restart_all(&s->free_sema);
+
+ return 0;
+}
+
static coroutine_fn void nbd_reconnect_attempt(BDRVNBDState *s)
{
- int ret;
- AioContext *aio_context = bdrv_get_aio_context(s->bs);
-
if (!nbd_client_connecting(s)) {
return;
}
@@ -398,42 +437,7 @@ static coroutine_fn void
nbd_reconnect_attempt(BDRVNBDState *s)
s->ioc = NULL;
}
- s->ioc = nbd_co_establish_connection(s->conn, &s->info, NULL);
- if (!s->ioc) {
- ret = -ECONNREFUSED;
- goto out;
- }
-
- qio_channel_set_blocking(QIO_CHANNEL(s->ioc), false, NULL);
- qio_channel_attach_aio_context(QIO_CHANNEL(s->ioc), aio_context);
-
- yank_register_function(BLOCKDEV_YANK_INSTANCE(s->bs->node_name), nbd_yank,
- s->bs);
-
- ret = nbd_handle_updated_info(s->bs, NULL);
- if (ret < 0) {
- /*
- * We have connected, but must fail for other reasons.
- * Send NBD_CMD_DISC as a courtesy to the server.
- */
- NBDRequest request = { .type = NBD_CMD_DISC };
-
- nbd_send_request(s->ioc, &request);
-
- yank_unregister_function(BLOCKDEV_YANK_INSTANCE(s->bs->node_name),
- nbd_yank, s->bs);
- object_unref(OBJECT(s->ioc));
- s->ioc = NULL;
-
- return;
- }
-
-out:
- if (ret >= 0) {
- /* successfully connected */
- s->state = NBD_CLIENT_CONNECTED;
- qemu_co_queue_restart_all(&s->free_sema);
- }
+ nbd_co_do_establish_connection(s->bs, NULL);
}
static coroutine_fn void nbd_co_reconnect_loop(BDRVNBDState *s)
--
2.31.1
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