OpenE2K/qemu-e2k
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Vladimir Sementsov-Ogievskiy f7651539d8 block/nbd: nbd reconnect 
Implement reconnect. To achieve this:

1. add new modes:
   connecting-wait: means, that reconnecting is in progress, and there
     were small number of reconnect attempts, so all requests are
     waiting for the connection.
   connecting-nowait: reconnecting is in progress, there were a lot of
     attempts of reconnect, all requests will return errors.

   two old modes are used too:
   connected: normal state
   quit: exiting after fatal error or on close

Possible transitions are:

   * -> quit
   connecting-* -> connected
   connecting-wait -> connecting-nowait (transition is done after
                      reconnect-delay seconds in connecting-wait mode)
   connected -> connecting-wait

2. Implement reconnect in connection_co. So, in connecting-* mode,
    connection_co, tries to reconnect unlimited times.

3. Retry nbd queries on channel error, if we are in connecting-wait
    state.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20191009084158.15614-3-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
2019-10-22 09:22:07 -05:00
..
accounting.c block: add empty account cookie type 2019-10-10 10:56:18 +02:00
aio_task.c block: introduce aio task pool 2019-10-10 10:56:17 +02:00
backup-top.c block/backup: use backup-top instead of write notifiers 2019-10-10 10:56:18 +02:00
backup-top.h block: introduce backup-top filter driver 2019-10-10 10:56:18 +02:00
backup.c block/dirty-bitmap: add bs link 2019-10-17 17:02:32 -04:00
blkdebug.c
blklogwrites.c
blkreplay.c block: implement bdrv_snapshot_goto for blkreplay 2019-10-14 17:12:48 +02:00
blkverify.c
block-backend.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
block-copy.c block/dirty-bitmap: add bs link 2019-10-17 17:02:32 -04:00
bochs.c block: Use QEMU_IS_ALIGNED 2019-09-16 14:48:30 +02:00
cloop.c block: Use QEMU_IS_ALIGNED 2019-09-16 14:48:30 +02:00
commit.c job: drop job_drain 2019-09-10 08:58:43 +02:00
copy-on-read.c
create.c block/create: Do not abort if a block driver is not available 2019-09-13 12:18:37 +02:00
crypto.c
crypto.h
curl.c curl: Check curl_multi_add_handle()'s return code 2019-09-16 15:31:12 +02:00
dirty-bitmap.c block/qcow2-bitmap: get rid of bdrv_has_changed_persistent_bitmaps 2019-10-17 17:02:32 -04:00
dmg-bz2.c
dmg-lzfse.c
dmg.c block: Use QEMU_IS_ALIGNED 2019-09-16 14:48:30 +02:00
dmg.h
file-posix.c qapi: query-blockstat: add driver specific file-posix stats 2019-10-10 10:56:18 +02:00
file-win32.c block: Implement .bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
gluster.c block: Implement .bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
io.c block: Reject misaligned write requests with BDRV_REQ_NO_FALLBACK 2019-10-14 17:12:48 +02:00
iscsi-opts.c
iscsi.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
linux-aio.c
Makefile.objs block: introduce backup-top filter driver 2019-10-10 10:56:18 +02:00
mirror.c block/dirty-bitmap: add bs link 2019-10-17 17:02:32 -04:00
nbd.c block/nbd: nbd reconnect 2019-10-22 09:22:07 -05:00
nfs.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
null.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
nvme.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
parallels.c block: Use bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
parallels.h
qapi.c qapi: query-blockstat: add driver specific file-posix stats 2019-10-10 10:56:18 +02:00
qcow2-bitmap.c block/qcow2-bitmap: fix and improve qcow2_reopen_bitmaps_rw 2019-10-17 17:53:28 -04:00
qcow2-cache.c
qcow2-cluster.c qcow2: Limit total allocation range to INT_MAX 2019-10-14 17:12:48 +02:00
qcow2-refcount.c
qcow2-snapshot.c
qcow2-threads.c block/qcow2: refactor encryption code 2019-09-16 15:36:22 +02:00
qcow2.c qcow2-bitmap: move bitmap reopen-rw code to qcow2_reopen_commit 2019-10-17 17:53:28 -04:00
qcow2.h block/qcow2-bitmap: do not remove bitmaps on reopen-ro 2019-10-17 17:02:32 -04:00
qcow.c
qed-check.c
qed-cluster.c
qed-l2-cache.c
qed-table.c
qed.c block: Implement .bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
qed.h
quorum.c
raw-format.c block: Implement .bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
rbd.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
replication.c block/backup: use backup-top instead of write notifiers 2019-10-10 10:56:18 +02:00
sheepdog.c block: Implement .bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
snapshot.c block/snapshot: Restrict set of snapshot nodes 2019-10-04 11:52:40 +02:00
ssh.c block: Implement .bdrv_has_zero_init_truncate() 2019-08-19 17:13:26 +02:00
stream.c job: drop job_drain 2019-09-10 08:58:43 +02:00
throttle-groups.c
throttle.c
trace-events block: move block_copy from block/backup.c to separate file 2019-10-10 10:56:17 +02:00
vdi.c vdi: Make block_status recurse for fixed images 2019-08-19 17:13:26 +02:00
vhdx-endian.c
vhdx-log.c
vhdx.c block/vhdx: add check for truncated image files 2019-10-14 17:12:48 +02:00
vhdx.h
vmdk.c vmdk: Reject invalid compressed writes 2019-09-03 14:55:35 +02:00
vpc.c vpc: Return 0 from vpc_co_create() on success 2019-09-10 08:58:43 +02:00
vvfat.c block: Use QEMU_IS_ALIGNED 2019-09-16 14:48:30 +02:00
vxhs.c replay: add BH oneshot event for block layer 2019-10-14 17:12:48 +02:00
win32-aio.c
write-threshold.c