Sergio Lopez fd6afc501a nbd/server: Use drained block ops to quiesce the server ... Before switching between AioContexts we need to make sure that we're fully quiesced ("nb_requests == 0" for every client) when entering the drained section. To do this, we set "quiescing = true" for every client on ".drained_begin" to prevent new coroutines from being created, and check if "nb_requests == 0" on ".drained_poll". Finally, once we're exiting the drained section, on ".drained_end" we set "quiescing = false" and call "nbd_client_receive_next_request()" to resume the processing of new requests. With these changes, "blk_aio_attach()" and "blk_aio_detach()" can be reverted to be as simple as they were before f148ae7d36. RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1960137 Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Sergio Lopez <slp@redhat.com> Message-Id: <20210602060552.17433-3-slp@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>		2021-06-02 14:23:20 +02:00
..
client.c	nbd: Use ERRP_GUARD()	2020-07-10 15:18:09 +02:00
common.c	nbd: Prepare for NBD_CMD_FLAG_FAST_ZERO	2019-09-05 16:03:13 -05:00
meson.build	block: move block exports to libblockdev	2020-10-23 13:42:16 +01:00
nbd-internal.h	configure: Add a proper check for sys/ioccom.h and use it in tpm_ioctl.h	2020-11-17 09:45:24 +01:00
server.c	nbd/server: Use drained block ops to quiesce the server	2021-06-02 14:23:20 +02:00
trace-events	trace: Remove trailing newline in events	2019-09-18 10:19:47 +01:00
trace.h	trace: switch position of headers to what Meson requires	2020-08-21 06:18:24 -04:00