Commit Graph

2779 Commits

Author SHA1 Message Date
Prasanna Kumar Kalever
c56ac33b7a block/gluster: improve defense over string to int conversion
using atoi() for converting string to int may be error prone in case if
string supplied in the argument is not a fold of numerical number,

This is not a bug because in the existing code,

static QemuOptsList runtime_tcp_opts = {
    .name = "gluster_tcp",
    .head = QTAILQ_HEAD_INITIALIZER(runtime_tcp_opts.head),
    .desc = {
        ...
        {
            .name = GLUSTER_OPT_PORT,
            .type = QEMU_OPT_NUMBER,
            .help = "port number ...",
        },
...
};

port type is QEMU_OPT_NUMBER, before we actually reaches atoi() port is already
defended by parse_option_number()

However It is a good practice to use function like parse_uint_full()
over atoi() to keep port self defended

Note: As now the port string to int conversion has its defence code set,
and also we understand that port argument is actually a string type,
in the follow up patch let's move port type from QEMU_OPT_NUMBER to
QEMU_OPT_STRING

[Jeff Cody: removed spurious parenthesis]

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
2016-11-01 07:55:57 -04:00
Fam Zheng
6f13acf97e block: Turn on "unmap" in active commit
We already specified BDRV_O_UNMAP when opening images in 'qemu-img
commit', but didn't turn on the "unmap" in the active commit job. This
patch fixes that so that zeroed clusters in top image can be discarded
which is desired in the virt-sparsify use case, where a temporary
overlay is created and fstrim'ed before commiting back, to free space in
the original image.

This also enables it for block-commit.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1474974892-5031-1-git-send-email-famz@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
2016-11-01 07:55:57 -04:00
Prasanna Kumar Kalever
6349c15410 block/gluster: memory usage: use one glfs instance per volume
Currently, for every drive accessed via gfapi we create a new glfs
instance (call glfs_new() followed by glfs_init()) which could consume
memory in few 100 MB's, from the table below it looks like for each
instance ~300 MB VSZ was consumed

Before:
-------
Disks   VSZ     RSS
1       1098728 187756
2       1430808 198656
3       1764932 199704
4       2084728 202684

This patch maintains a list of pre-opened glfs objects. On adding
a new drive belonging to the same gluster volume, we just reuse the
existing glfs object by updating its refcount.

With this approch we shrink up the unwanted memory consumption and
glfs_new/glfs_init calls for accessing a disk (file) if belongs to
same volume.

From below table notice that the memory usage after adding a disk
(which will reuse the existing glfs object hence) is in negligible
compared to before.

After:
------
Disks   VSZ     RSS
1       1101964 185768
2       1109604 194920
3       1114012 196036
4       1114496 199868

Disks: number of -drive
VSZ: virtual memory size of the process in KiB
RSS: resident set size, the non-swapped physical memory (in kiloBytes)

VSZ and RSS are analyzed using 'ps aux' utility.

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 1477581890-4811-1-git-send-email-prasanna.kalever@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
2016-11-01 07:55:57 -04:00
Jeff Cody
d9b789745b block: add gluster ifdef guard checks for SEEK_DATA/SEEK_HOLE support
Add checks to see if the system compiling QEMU has support for
SEEK_HOLE/SEEK_DATA.  If the system does not, we will flag that seek
data is unsupported in gluster.

Note: this is not a check on whether the gluster server itself supports
SEEK_DATA (that is already done during runtime), but rather if the
compilation environment supports SEEK_DATA.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
Message-id: 00370bce5c98140d6c56ad5145635ec6551265cc.1475876377.git.jcody@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
2016-11-01 07:55:57 -04:00
Xiubo Li
e38f643a1d rbd: make the code more readable
Make it a bit clearer and more readable.

Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 1476519973-6436-1-git-send-email-lixiubo@cmss.chinamobile.com
CC: John Snow <jsnow@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
2016-11-01 07:55:57 -04:00
Ashijeet Acharya
94d6a7a76e block/nfs: Introduce runtime_opts in NFS
Make NFS block driver use various fine grained runtime_opts.
Set .bdrv_parse_filename() to nfs_parse_filename() and introduce two
new functions nfs_parse_filename() and nfs_parse_uri() to help parsing
the URI.
Add a new option "server" which then accepts a new struct NFSServer.

Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
[ kwolf: Fixed client->path ]
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:39 +01:00
Tomáš Golembiovský
2fdc70452a raw_bsd: add offset and size options
Added two new options 'offset' and 'size'. This makes it possible to use
only part of the file as a device. This can be used e.g. to limit the
access only to single partition in a disk image or use a disk inside a
tar archive (like OVA).

When 'size' is specified we do our best to honour it.

Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:39 +01:00
Alberto Garcia
61b49e48b3 block: Support streaming to an intermediate layer
This makes sure that the image we are streaming into is open in
read-write mode during the operation.

Operation blockers are also set in all intermediate nodes, since they
will be removed from the chain afterwards.

Finally, this also unblocks the stream operation in backing files.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:38 +01:00
Alberto Garcia
f3ede4b05d block: Block all intermediate nodes in commit_active_start()
When block-commit is launched without the top parameter, it uses
internally a mirror block job. In that case all intermediate nodes
between the active and base nodes must be blocked as well.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:38 +01:00
Alberto Garcia
3e4c5122cb block: Block all nodes involved in the block-commit operation
After a successful block-commit operation all nodes between top and
base are removed from the backing chain, and top's overlay needs to
be updated to point to base. Because of that we should prevent other
block jobs from messing with them.

This patch blocks all operations in these nodes in commit_start().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:38 +01:00
Alberto Garcia
b7340d002e block: Use block_job_add_bdrv() in backup_start()
Use block_job_add_bdrv() instead of blocking all operations in
backup_start() and unblocking them in backup_run().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:38 +01:00
Alberto Garcia
cee3c6b5ca block: Use block_job_add_bdrv() in mirror_start_job()
Use block_job_add_bdrv() instead of blocking all operations in
mirror_start_job() and unblocking them in mirror_exit().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:52:38 +01:00
Alberto Garcia
c0778f6693 block: Add bdrv_drain_all_{begin,end}()
bdrv_drain_all() doesn't allow the caller to do anything after all
pending requests have been completed but before block jobs are
resumed.

This patch splits bdrv_drain_all() into _begin() and _end() for that
purpose. It also adds aio_{disable,enable}_external() calls to disable
external clients in the meantime.

An important restriction of this split is that no new block jobs or
BlockDriverStates can be created between the bdrv_drain_all_begin()
and bdrv_drain_all_end() calls. This is not a concern now because
we'll only be using this in bdrv_reopen_multiple(), but it must be
dealt with if we ever have other uses cases in the future.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:51:14 +01:00
Ashijeet Acharya
1059f1bb42 block/ssh: Use InetSocketAddress options
Drop the use of legacy options in favour of the InetSocketAddress
options.

Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:49:13 +01:00
Ashijeet Acharya
0da5b8ef5d block/ssh: Add InetSocketAddress and accept it
Add InetSocketAddress compatibility to SSH driver.

Add a new option "server" to the SSH block driver which then accepts
a InetSocketAddress.

"host" and "port" are supported as legacy options and are mapped to
their InetSocketAddress representation.

Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:49:13 +01:00
Ashijeet Acharya
89dbe18089 block/ssh: Add ssh_has_filename_options_conflict()
We have 5 options plus ("server") option which is added in the next
patch that conflict with specifying a SSH filename. We need to iterate
over all the options to check whether its key has an "server." prefix.

This iteration will help us adding the new option "server" easily.

Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-31 16:49:13 +01:00
Peter Maydell
5273a45e75 -----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
 
 iQEcBAABCAAGBQJYE2ULAAoJEMo1YkxqkXHGvvAH/iDPIAiwBXbndL3KhQTneSHn
 ctd4I3VK1/VVTIBRJIetqETiWiAm/WoRhI9kBc/NrQxBFx3ko+fpSYFS2t6lJYnV
 EX0vjTKjFhr05tOTQDH/SQtHdU5x/x2M8SsxqrCcTyLm5VDfdPeBlMBfSNMj/L2K
 bwinANVEwr6LOM0h8weQ0SvOCa5MLII2p5ufGwKQmhUY5tgZvFlyPa+quDVisKoE
 7CpLwWHmUQSNxUXSaru90osUJyk90wCcYxPpJN3YO1MHvpH4kG8DpZ8bnFqLAoNw
 zkRdqIrlfntD+mKDqRU1y0GXxu9I4VK1UDcQyRFoSdMi2oHR+L018sQEjCYTAXo=
 =n+CF
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/famz/tags/for-upstream' into staging

# gpg: Signature made Fri 28 Oct 2016 15:47:39 BST
# gpg:                using RSA key 0xCA35624C6A9171C6
# gpg: Good signature from "Fam Zheng <famz@redhat.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 5003 7CB7 9706 0F76 F021  AD56 CA35 624C 6A91 71C6

* remotes/famz/tags/for-upstream:
  aio: convert from RFifoLock to QemuRecMutex
  qemu-thread: introduce QemuRecMutex
  iothread: release AioContext around aio_poll
  block: only call aio_poll on the current thread's AioContext
  qemu-img: call aio_context_acquire/release around block job
  qemu-io: acquire AioContext
  block: prepare bdrv_reopen_multiple to release AioContext
  replication: pass BlockDriverState to reopen_backing_file
  iothread: detach all block devices before stopping them
  aio: introduce qemu_get_current_aio_context
  sheepdog: use BDRV_POLL_WHILE
  nfs: use BDRV_POLL_WHILE
  nfs: move nfs_set_events out of the while loops
  block: introduce BDRV_POLL_WHILE
  qed: Implement .bdrv_drain
  block: change drain to look only at one child at a time
  block: add BDS field to count in-flight requests
  mirror: use bdrv_drained_begin/bdrv_drained_end
  blockjob: introduce .drain callback for jobs
  replication: interrupt failover if the main device is closed

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-10-31 10:10:16 +00:00
Peter Maydell
01b601f061 Merge qio 2016/10/27 v1
-----BEGIN PGP SIGNATURE-----
 
 iQIcBAABCAAGBQJYEfjrAAoJEL6G67QVEE/fdU4P/i7yBJo436OpkdgeWS8AWuFr
 ptZ+Fj/weGka5GU9E3KQu36kbSgrtfcgwTHphCMXnZ0YCeKQDuM57f7LNiN6qheB
 nqgJvJioLbUvLTQvCHOISM7bWOnYvASBmYtLJFtUcP/jhdOy61KaADnJ+7MbliNv
 yJSW2RN+s/y9nUb+dxEpIXXUVMRa6BX+wHW3O44c1oLn6/Pe20aJeHTyDx3qiBhD
 8RYXUgRZopH2bouBSzXgMQTbn/QMD/dC81WQlHKlt4swffyei2D/1pciOcuc0SXz
 +SZdkTre5JB5Kd6DU8zQ6PrrIt1nPmLSptSyhQvNxm+uWNWHnFcW1s2aYmf/ikjl
 4boW37ayJx09mns8yv7TerzEPbL5qJvVX8Dsnb6telkvrS9hy9S1xuIB5xHbt6/h
 vwFmCdwaZoGpDDaoXRL+9k9TOI9BbEMKX33nAPDqvEXLMIf+og4fmweTKcY4XTRL
 /Fdg1H71v8Ayv+r5TJOKwFg3PNNjnvqkbk1psS+aaW7dup43iaYGIKWy+VFaCufk
 hPXLOtR5lUsYC2qm+nkjPIgoP7D8oZx4AGkCHbYsqzi+l1lynZH3rBIs8ggLr72o
 FFk4g0sNYe1ccAa89jFEgWIQbS0N6ckUXCv12g3eyF/UIC1F35/mGGugSRnTXuc2
 a/WsvgU7pGBrtqXcg7lF
 =gsxL
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/berrange/tags/pull-qio-2016-10-27-1' into staging

Merge qio 2016/10/27 v1

# gpg: Signature made Thu 27 Oct 2016 13:54:03 BST
# gpg:                using RSA key 0xBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>"
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>"
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/pull-qio-2016-10-27-1:
  main: set names for main loop sources created
  vnc: set name for all I/O channels created
  migration: set name for all I/O channels created
  char: set name for all I/O channels created
  nbd: set name for all I/O channels created
  io: add ability to set a name for IO channels
  io: Add a QIOChannelSocket cleanup test
  io: set LISTEN flag explicitly for listen sockets
  io: Introduce a qio_channel_set_feature() helper
  io: Use qio_channel_has_feature() where applicable
  io: Fix double shift usages on QIOChannel features

Conflicts:
	qemu-char.c

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-10-28 15:30:55 +01:00
Paolo Bonzini
c9d1a56174 block: only call aio_poll on the current thread's AioContext
aio_poll is not thread safe; for example bdrv_drain can hang if
the last in-flight I/O operation is completed in the I/O thread after
the main thread has checked bs->in_flight.

The bug remains latent as long as all of it is called within
aio_context_acquire/aio_context_release, but this will change soon.

To fix this, if bdrv_drain is called from outside the I/O thread,
signal the main AioContext through a dummy bottom half.  The event
loop then only runs in the I/O thread.

Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1477565348-5458-18-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
720150f318 block: prepare bdrv_reopen_multiple to release AioContext
After the next patch bdrv_drain_all will have to be called without holding any
AioContext.  Prepare to do this by adding an AioContext argument to
bdrv_reopen_multiple.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1477565348-5458-15-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
8dd9006e9b replication: pass BlockDriverState to reopen_backing_file
This will be needed in the next patch to retrieve the AioContext.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1477565348-5458-14-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
f11672dbc0 sheepdog: use BDRV_POLL_WHILE
This is important when the sheepdog driver works on a BlockDriverState
that is attached to an I/O thread other than the main thread.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-11-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
d746427aaf nfs: use BDRV_POLL_WHILE
This will make it possible to use nfs_get_allocated_file_size on
a file that is not in the main AioContext.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1477565348-5458-10-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
aa92d6c460 nfs: move nfs_set_events out of the while loops
nfs_set_events only needs to be called once before entering the
while loop; afterwards, nfs_process_read and nfs_process_write
take care of it.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1477565348-5458-9-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
88b062c203 block: introduce BDRV_POLL_WHILE
We want the BDS event loop to run exclusively in the iothread that
owns the BDS's AioContext.  This macro will provide the synchronization
between the two event loops; for now it just wraps the common idiom
of a while loop around aio_poll.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-8-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Fam Zheng
6653a73d12 qed: Implement .bdrv_drain
The "need_check_timer" is used to clear the "NEED_CHECK" flag in the
image header after a grace period once metadata update has finished. To
comply with the bdrv_drain semantics, we should make sure it remains
deleted once .bdrv_drain is called.

The change to qed_need_check_timer_cb is needed because bdrv_qed_drain
is called after s->bs has been drained, and should not operate on it;
instead it should operate on the BdrvChild-ren exclusively.  Doing so
is easy because QED does not have a bdrv_co_flush_to_os callback, hence
all that is needed to flush it is to ensure writes have reached the disk.

Based on commit df9a681dc9 (which however included some unrelated
hunks, possibly due to a merge failure or an overlooked squash).
The patch was reverted because at the time bdrv_qed_drain could call
qed_plug_allocating_write_reqs while an allocating write was queued.
This however is not possible anymore after the previous patch;
.bdrv_drain is only called after all writes have completed at the
QED level, and its purpose is to trigger metadata writes in bs->file.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1477565348-5458-7-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
d42cf28837 block: change drain to look only at one child at a time
bdrv_requests_pending is checking children to also wait until internal
requests (such as metadata writes) have completed.  However, checking
children is in general overkill.  Children requests can be of two kinds:

- requests caused by an operation on bs, e.g. a bdrv_aio_write to bs
causing a write to bs->file->bs.  In this case, the parent's in_flight
count will always be incremented by at least one for every request in
the child.

- asynchronous metadata writes or flushes.  Such writes can be started
even if bs's in_flight count is zero, but not after the .bdrv_drain
callback has been invoked.

This patch therefore changes bdrv_drain to finish I/O in the parent
(after which the parent's in_flight will be locked to zero), call
bdrv_drain (after which the parent will not generate I/O on the child
anymore), and then wait for internal I/O in the children to complete.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-6-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
9972354856 block: add BDS field to count in-flight requests
Unlike tracked_requests, this field also counts throttled requests,
and remains non-zero if an AIO operation needs a BH to be "really"
completed.

With this change, it is no longer necessary to have a dummy
BdrvTrackedRequest for requests that are never serialising, and
it is no longer necessary to poll the AioContext once after
bdrv_requests_pending(bs) returns false.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-5-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
9a0cec664e mirror: use bdrv_drained_begin/bdrv_drained_end
Ensure that there are no changes between the last check to
bdrv_get_dirty_count and the switch to the target.

There is already a bdrv_drained_end call, we only need to ensure
that bdrv_drained_begin is not called twice.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-4-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
bae8196d9f blockjob: introduce .drain callback for jobs
This is required to decouple block jobs from running in an
AioContext.  With multiqueue block devices, a BlockDriverState
does not really belong to a single AioContext.

The solution is to first wait until all I/O operations are
complete; then loop in the main thread for the block job to
complete entirely.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-3-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Paolo Bonzini
50ab0e0908 replication: interrupt failover if the main device is closed
Without this change, there is a race condition in tests/test-replication.
Depending on how fast the failover job (active commit) runs, there is a
chance of two bad things happening:

1) replication_done can be called after the secondary has been closed
and hence when the BDRVReplicationState is not valid anymore.

2) two copies of the active disk are present during the
/replication/secondary/stop test (that test runs immediately after
/replication/secondary/start, which tests failover).  This causes the
corruption detector to fire.

Reviewed-by: Wen Congyang <wency@cn.fujitsu.com>
Reviewed-by: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-2-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2016-10-28 21:50:18 +08:00
Max Reitz
f84d431b86 block/nbd: Use SocketAddress options
Drop the use of legacy options in favor of the SocketAddress
representation, even for internal use (i.e. for storing the result of
the filename parsing).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Max Reitz
491d6c7c4e block/nbd: Accept SocketAddress
Add a new option "server" to the NBD block driver which accepts a
SocketAddress.

"path", "host" and "port" are still supported as legacy options and are
mapped to their corresponding SocketAddress representation.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Max Reitz
48c38e0b8d block/nbd: Add nbd_has_filename_options_conflict()
Right now, we have four possible options that conflict with specifying
an NBD filename, and a future patch will add another one ("address").
This future option is a nested QDict that is flattened at this point,
requiring us to test each option whether its key has an "address."
prefix. Therefore, we will then need to iterate through all options
(including the "export" option which was not covered so far).

Adding this iteration logic now will simplify adding the new option
later. A nice side effect is that the user will not receive a long list
of five options which are not supposed to be specified with a filename,
but we can actually print the problematic option.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Max Reitz
fcfcd8ffcc block/nbd: Use qdict_put()
Instead of inlining this nice macro (i.e. resorting to
qdict_put_obj(..., QOBJECT(...))), use it.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Max Reitz
7edca33804 block/nbd: Default port in nbd_refresh_filename()
Instead of not emitting the port in nbd_refresh_filename(), just set it
to the default if the user did not specify it. This makes the logic a
bit simpler.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Max Reitz
442045cbce block/nbd: Reject port parameter without host
Currently, a port that is passed along with a UNIX socket path is
silently ignored. That is not exactly ideal, it should be an error
instead.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Max Reitz
82d73014a9 block/nbd: Drop trailing "." in error messages
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-27 19:05:23 +02:00
Kevin Wolf
cbc14ac9c3 block: Remove bdrv_aio_ioctl()
It is unused now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:23 +02:00
Kevin Wolf
151a2930c4 raw: Implement .bdrv_co_ioctl instead of .bdrv_aio_ioctl
It's the simpler interface to use for the raw format driver.

Apart from that, this removes the last user of the AIO emulation
implemented by bdrv_aio_ioctl().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:23 +02:00
Kevin Wolf
16a389dc9e block: Introduce .bdrv_co_ioctl() driver callback
This allows drivers to implement ioctls in a coroutine-based way.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:23 +02:00
Kevin Wolf
61b2450414 block: Remove bdrv_ioctl()
It is unused now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:23 +02:00
Kevin Wolf
0d4377b3ea raw-posix: Don't use bdrv_ioctl()
Instead of letting raw-posix use the bdrv_ioctl() abstraction to issue
an ioctl to itself, just call ioctl() directly.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:23 +02:00
Kevin Wolf
48af776a5b block: Use blk_co_ioctl() for all BB level ioctls
All read/write functions already have a single coroutine-based function
on the BlockBackend level through which all requests go (no matter what
API style the external caller used) and which passes the requests down
to the block node level.

This patch exports a bdrv_co_ioctl() function and uses it to extend this
mode of operation to ioctls.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:22 +02:00
Kevin Wolf
7381e95cc2 block: Remove bdrv_aio_pdiscard()
It is unused now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:22 +02:00
Kevin Wolf
8c2e3dd55f block: Use blk_co_pdiscard() for all BB level discard
All read/write functions already have a single coroutine-based function
on the BlockBackend level through which all requests go (no matter what
API style the external caller used) and which passes the requests down
to the block node level.

This patch extends this mode of operation to discards.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:22 +02:00
Kevin Wolf
be07a88981 block: Use blk_co_flush() for all BB level flushes
All read/write functions already have a single coroutine-based function
on the BlockBackend level through which all requests go (no matter what
API style the external caller used) and which passes the requests down
to the block node level.

This patch extends this mode of operation to flushes.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-27 19:05:22 +02:00
Daniel P. Berrange
0d73f7253e nbd: set name for all I/O channels created
Ensure that all I/O channels created for NBD are given names
to distinguish their respective roles.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-10-27 09:13:10 +02:00
Daniel P. Berrange
7d5e199ade qapi: rename QmpOutputVisitor to QObjectOutputVisitor
The QmpOutputVisitor has no direct dependency on QMP. It is
valid to use it anywhere that one wants a QObject. Rename it
to better reflect its functionality as a generic QAPI
to QObject converter.

The commit before previous renamed the files, this one renames C
identifiers.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1475246744-29302-6-git-send-email-berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Split into file rename and identifier rename]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-10-25 16:25:54 +02:00
Daniel P. Berrange
b3db211f3c qapi: rename *qmp-*-visitor* to *qobject-*-visitor*
The QMP visitors have no direct dependency on QMP. It is
valid to use them anywhere that one has a QObject. Rename them
to better reflect their functionality as a generic QObject
to QAPI converter.

This is the first of three parts: rename the files.  The next two
parts will rename C identifiers.  The split is necessary to make git
rename detection work.

Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Split into file and identifier rename, two comments touched up]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-10-25 16:25:48 +02:00