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John Snow c47ee043dc block-backend: Always notify on blk_eject 
blk_eject is only used by scsi-disk and atapi, and in both cases we
only attempt to invoke blk_eject if we have a bona-fide change in
tray state.

The "issue" here is that the tray state does not generate a QMP event
unless there is a medium/BDS attached to the device, so if libvirt et al
are waiting for a tray event to occur from an empty-but-closed drive,
software opening that drive will not emit an event and libvirt will
wait forever.

Change this by modifying blk_eject to always emit an event, instead of
conditionally on a "real" backend eject.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1373264

Reported-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1478553214-497-2-git-send-email-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
2016-11-14 11:15:54 -05:00
..
accounting.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
archipelago.c
block: use aio_bh_schedule_oneshot
2016-10-07 13:34:07 +02:00
backup.c
blockjobs: split interface into public/private, Part 1
2016-11-01 08:04:56 -04:00
blkdebug.c
block: use aio_bh_schedule_oneshot
2016-10-07 13:34:07 +02:00
blkreplay.c
replay: allow replay stopping and restarting
2016-09-27 11:57:30 +02:00
blkverify.c
block: use aio_bh_schedule_oneshot
2016-10-07 13:34:07 +02:00
block-backend.c
block-backend: Always notify on blk_eject
2016-11-14 11:15:54 -05:00
bochs.c
block: Convert bdrv_co_preadv/pwritev to BdrvChild
2016-07-05 16:46:27 +02:00
cloop.c
block: Convert bdrv_pread(v) to BdrvChild
2016-07-05 16:46:27 +02:00
commit.c
blockjobs: split interface into public/private, Part 1
2016-11-01 08:04:56 -04:00
crypto.c
crypto: make PBKDF iterations configurable for LUKS format
2016-09-19 16:30:45 +01:00
curl.c
block: use aio_bh_schedule_oneshot
2016-10-07 13:34:07 +02:00
dirty-bitmap.c
block: More operations for meta dirty bitmap
2016-10-24 17:56:07 +02:00
dmg-bz2.c
dmg: Move libbz2 code to dmg-bz2.so
2016-10-07 14:14:06 +02:00
dmg.c
dmg: Move libbz2 code to dmg-bz2.so
2016-10-07 14:14:06 +02:00
dmg.h
dmg: Move libbz2 code to dmg-bz2.so
2016-10-07 14:14:06 +02:00
gluster.c
block/gluster: fix port type in the QAPI options list
2016-11-01 07:55:57 -04:00
io.c
block: Don't mark node clean after failed flush
2016-11-08 16:06:35 +00:00
iscsi.c
block/iscsi: Adding new iSER transport layer option
2016-10-24 11:30:55 +02:00
linux-aio.c
linux-aio: fix re-entrant completion processing
2016-09-28 17:11:23 +01:00
Makefile.objs
dmg: Move libbz2 code to dmg-bz2.so
2016-10-07 14:14:06 +02:00
mirror.c
blockjobs: split interface into public/private, Part 1
2016-11-01 08:04:56 -04:00
nbd-client.c
nbd: Implement NBD_CMD_WRITE_ZEROES on client
2016-11-02 09:28:56 +01:00
nbd-client.h
nbd: Implement NBD_CMD_WRITE_ZEROES on client
2016-11-02 09:28:56 +01:00
nbd.c
nbd: Implement NBD_CMD_WRITE_ZEROES on client
2016-11-02 09:28:56 +01:00
nfs.c
block/nfs: Introduce runtime_opts in NFS
2016-10-31 16:52:39 +01:00
null.c
block: use aio_bh_schedule_oneshot
2016-10-07 13:34:07 +02:00
parallels.c
block/parallels: check new image size
2016-08-05 09:59:06 +01:00
qapi.c
qapi: rename QmpOutputVisitor to QObjectOutputVisitor
2016-10-25 16:25:54 +02:00
qcow2-cache.c
block: Convert bdrv_pwrite(v/_sync) to BdrvChild
2016-07-05 16:46:27 +02:00
qcow2-cluster.c
qcow2: Support BDRV_REQ_MAY_UNMAP
2016-10-24 17:54:03 +02:00
qcow2-refcount.c
block: Convert bdrv_discard() to byte-based
2016-07-20 14:11:55 +01:00
qcow2-snapshot.c
block: Convert bdrv_pwrite(v/_sync) to BdrvChild
2016-07-05 16:46:27 +02:00
qcow2.c
qcow2: Support BDRV_REQ_MAY_UNMAP
2016-10-24 17:54:03 +02:00
qcow2.h
qcow2: Support BDRV_REQ_MAY_UNMAP
2016-10-24 17:54:03 +02:00
qcow.c
crypto: extend mode as a parameter in qcrypto_cipher_supports()
2016-10-19 10:09:24 +01:00
qed-check.c
qed: Use DIV_ROUND_UP
2016-06-07 18:19:24 +03:00
qed-cluster.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
qed-gencb.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
qed-l2-cache.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
qed-table.c
block: introduce BDRV_POLL_WHILE
2016-10-28 21:50:18 +08:00
qed.c
qed: Implement .bdrv_drain
2016-10-28 21:50:18 +08:00
qed.h
block: use aio_bh_schedule_oneshot
2016-10-07 13:34:07 +02:00
quorum.c
quorum: do not allocate multiple iovecs for FIFO strategy
2016-10-24 17:56:06 +02:00
raw_bsd.c
raw_bsd: add offset and size options
2016-10-31 16:52:39 +01:00
raw-posix.c
raw-posix: Don't use bdrv_ioctl()
2016-10-27 19:05:23 +02:00
raw-win32.c
block: improve error handling in raw_open
2016-10-24 17:54:03 +02:00
rbd.c
rbd: make the code more readable
2016-11-01 07:55:57 -04:00
replication.c
Replication/Blockjobs: Create replication jobs as internal
2016-11-01 07:55:57 -04:00
sheepdog.c
block: only call aio_poll on the current thread's AioContext
2016-10-28 21:50:18 +08:00
snapshot.c
error: Remove NULL checks on error_propagate() calls
2016-06-20 16:38:13 +02:00
ssh.c
block/ssh: Use InetSocketAddress options
2016-10-31 16:49:13 +01:00
stream.c
blockjobs: split interface into public/private, Part 1
2016-11-01 08:04:56 -04:00
throttle-groups.c
throttle: Correct access to wrong BlockBackendPublic structures
2016-10-24 17:54:03 +02:00
trace-events
blockjob: centralize QMP event emissions
2016-11-01 07:55:57 -04:00
vdi.c
vdi: Use QEMU UUID API
2016-09-23 11:42:52 +08:00
vhdx-endian.c
vhdx: Use QEMU UUID API
2016-09-23 11:42:52 +08:00
vhdx-log.c
block: Convert bdrv_pwrite(v/_sync) to BdrvChild
2016-07-05 16:46:27 +02:00
vhdx.c
vhdx: Use QEMU UUID API
2016-09-23 11:42:52 +08:00
vhdx.h
block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec
2014-12-12 15:42:22 +00:00
vmdk.c
vmdk: add vmdk_co_pwritev_compressed
2016-09-05 19:06:48 +02:00
vpc.c
vpc: Use QEMU UUID API
2016-09-23 11:42:52 +08:00
vvfat.c
block: Add "read-only" to the options QDict
2016-09-23 13:36:10 +02:00
win32-aio.c
linux-aio: share one LinuxAioState within an AioContext
2016-07-18 15:09:31 +01:00
write-threshold.c
block: use bdrv_add_before_write_notifier
2016-10-07 13:34:07 +02:00