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block/nbd: Move s->ioc on AioContext change 

s->ioc must always be attached to the NBD node's AioContext.  If that
context changes, s->ioc must be attached to the new context.

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2033626
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
This commit is contained in:
Hanna Reitz 2022-02-04 12:10:11 +01:00 committed by Vladimir Sementsov-Ogievskiy
parent eaf1e85d4d
commit e15f3a66c8
1 changed files with 45 additions and 0 deletions
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45
block/nbd.c
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@ -2055,6 +2055,42 @@ static void nbd_cancel_in_flight(BlockDriverState *bs)
nbd_co_establish_connection_cancel(s->conn);
}
static void nbd_attach_aio_context(BlockDriverState *bs,
AioContext *new_context)
{
BDRVNBDState *s = bs->opaque;
/* The open_timer is used only during nbd_open() */
assert(!s->open_timer);
/*
* The reconnect_delay_timer is scheduled in I/O paths when the
* connection is lost, to cancel the reconnection attempt after a
* given time. Once this attempt is done (successfully or not),
* nbd_reconnect_attempt() ensures the timer is deleted before the
* respective I/O request is resumed.
* Since the AioContext can only be changed when a node is drained,
* the reconnect_delay_timer cannot be active here.
*/
assert(!s->reconnect_delay_timer);
if (s->ioc) {
qio_channel_attach_aio_context(s->ioc, new_context);
}
}
static void nbd_detach_aio_context(BlockDriverState *bs)
{
BDRVNBDState *s = bs->opaque;
assert(!s->open_timer);
assert(!s->reconnect_delay_timer);
if (s->ioc) {
qio_channel_detach_aio_context(s->ioc);
}
}
static BlockDriver bdrv_nbd = {
.format_name = "nbd",
.protocol_name = "nbd",
@ -2078,6 +2114,9 @@ static BlockDriver bdrv_nbd = {
.bdrv_dirname = nbd_dirname,
.strong_runtime_opts = nbd_strong_runtime_opts,
.bdrv_cancel_in_flight = nbd_cancel_in_flight,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_detach_aio_context = nbd_detach_aio_context,
};
static BlockDriver bdrv_nbd_tcp = {
@ -2103,6 +2142,9 @@ static BlockDriver bdrv_nbd_tcp = {
.bdrv_dirname = nbd_dirname,
.strong_runtime_opts = nbd_strong_runtime_opts,
.bdrv_cancel_in_flight = nbd_cancel_in_flight,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_detach_aio_context = nbd_detach_aio_context,
};
static BlockDriver bdrv_nbd_unix = {
@ -2128,6 +2170,9 @@ static BlockDriver bdrv_nbd_unix = {
.bdrv_dirname = nbd_dirname,
.strong_runtime_opts = nbd_strong_runtime_opts,
.bdrv_cancel_in_flight = nbd_cancel_in_flight,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_detach_aio_context = nbd_detach_aio_context,
};
static void bdrv_nbd_init(void)