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nbd: trace long NBD operations

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At the moment there are 2 sources of lengthy operations if configured:
* open connection, which could retry inside and
* reconnect of already opened connection
These operations could be quite lengthy and cumbersome to catch thus
it would be quite natural to add trace points for them.

This patch is based on the original downstream work made by Vladimir.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Eric Blake <eblake@redhat.com>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Hanna Reitz <hreitz@redhat.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
This commit is contained in:
Denis V. Lunev
2022-05-30 12:39:29 +02:00
committed by Vladimir Sementsov-Ogievskiy
parent 9d05a87b77
commit 8bb100c9e2
4 changed files with 12 additions and 1 deletions
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2
nbd/client-connection.c
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@@ -23,6 +23,7 @@
*/
#include "qemu/osdep.h"
#include "trace.h"
#include "block/nbd.h"
@@ -210,6 +211,7 @@ static void *connect_thread_func(void *opaque)
object_unref(OBJECT(conn->sioc));
conn->sioc = NULL;
if (conn->do_retry && !conn->detached) {
trace_nbd_connect_thread_sleep(timeout);
qemu_mutex_unlock(&conn->mutex);
sleep(timeout);