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From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, mreitz@redhat.com, kwolf@redhat.com,
	vsementsov@virtuozzo.com, eblake@redhat.com,
	rvkagan@yandex-team.ru, den@openvz.org
Subject: [PATCH 12/14] block/nbd: refactor nbd_co_establish_connection
Date: Wed,  7 Apr 2021 13:46:35 +0300	[thread overview]
Message-ID: <20210407104637.36033-13-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210407104637.36033-1-vsementsov@virtuozzo.com>

We are going to drop nbd connect thread states for simplicity. This is
a step that makes further commit simpler.

Note, that yank_* calls moved out of thr->mutex. They shouldn't be
related and already called from other places in the file not under the
mutex.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 block/nbd.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/block/nbd.c b/block/nbd.c
index 6729561935..f0319d2256 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -413,7 +413,6 @@ static void connect_thread_cb(QIOChannelSocket *sioc, int ret, void *opaque)
 static int coroutine_fn
 nbd_co_establish_connection(BlockDriverState *bs)
 {
-    int ret;
     BDRVNBDState *s = bs->opaque;
     NBDConnectCB *thr = s->connect_thread;
 
@@ -430,10 +429,7 @@ nbd_co_establish_connection(BlockDriverState *bs)
         thr->state = CONNECT_THREAD_NONE;
         s->sioc = thr->sioc;
         thr->sioc = NULL;
-        yank_register_function(BLOCKDEV_YANK_INSTANCE(bs->node_name),
-                               nbd_yank, bs);
-        qemu_mutex_unlock(&thr->mutex);
-        return 0;
+        goto out;
     case CONNECT_THREAD_RUNNING:
         /* Already running, will wait */
         break;
@@ -459,11 +455,6 @@ nbd_co_establish_connection(BlockDriverState *bs)
         thr->state = CONNECT_THREAD_NONE;
         s->sioc = thr->sioc;
         thr->sioc = NULL;
-        if (s->sioc) {
-            yank_register_function(BLOCKDEV_YANK_INSTANCE(bs->node_name),
-                                   nbd_yank, bs);
-        }
-        ret = (s->sioc ? 0 : -1);
         break;
     case CONNECT_THREAD_RUNNING:
     case CONNECT_THREAD_RUNNING_DETACHED:
@@ -472,7 +463,6 @@ nbd_co_establish_connection(BlockDriverState *bs)
          * failed. Still connect thread is executing in background, and its
          * result may be used for next connection attempt.
          */
-        ret = -1;
         break;
 
     case CONNECT_THREAD_NONE:
@@ -486,9 +476,15 @@ nbd_co_establish_connection(BlockDriverState *bs)
         abort();
     }
 
+out:
     qemu_mutex_unlock(&thr->mutex);
 
-    return ret;
+    if (s->sioc) {
+        yank_register_function(BLOCKDEV_YANK_INSTANCE(bs->node_name),
+                               nbd_yank, bs);
+    }
+
+    return s->sioc ? 0 : -1;
 }
 
 /*
-- 
2.29.2



  parent reply	other threads:[~2021-04-07 10:55 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-07 10:46 [PATCH 00/14] nbd: move reconnect-thread to separate file Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 01/14] block/nbd: BDRVNBDState: drop unused connect_err Vladimir Sementsov-Ogievskiy
2021-04-07 11:13   ` Roman Kagan
2021-04-07 10:46 ` [PATCH 02/14] block/nbd: nbd_co_establish_connection(): drop unused errp Vladimir Sementsov-Ogievskiy
2021-04-07 11:28   ` Roman Kagan
2021-04-07 10:46 ` [PATCH 03/14] block/nbd: drop unused NBDConnectThread::err field Vladimir Sementsov-Ogievskiy
2021-04-07 11:42   ` Roman Kagan
2021-04-07 11:55     ` Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 04/14] block/nbd: split connect_thread_cb() out of connect_thread_func() Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 05/14] block/nbd: rename NBDConnectThread to NBDConnectCB Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 06/14] block/nbd: further segregation of connect-thread Vladimir Sementsov-Ogievskiy
2021-04-08 10:44   ` Roman Kagan
2021-04-07 10:46 ` [PATCH 07/14] block/nbd: drop nbd_free_connect_thread() Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 08/14] block/nbd: move nbd connect-thread to nbd/client-connect.c Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 09/14] block/nbd: NBDConnectCB: drop bh_* fields Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 10/14] block/nbd: move wait_connect field under mutex protection Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 11/14] block/nbd: refactor connect_bh() Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` Vladimir Sementsov-Ogievskiy [this message]
2021-04-07 10:46 ` [PATCH 13/14] block/nbd: nbd_co_establish_connection_cancel(): rename wake to do_wake Vladimir Sementsov-Ogievskiy
2021-04-07 10:46 ` [PATCH 14/14] block/nbd: drop thr->state Vladimir Sementsov-Ogievskiy
2021-04-08 10:03 ` DROP THIS Re: [PATCH 00/14] nbd: move reconnect-thread to separate file Vladimir Sementsov-Ogievskiy

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