Max Filippov [Fri, 12 May 2017 19:05:23 +0000 (12:05 -0700)]
target/xtensa: fix return value of read/write simcalls
Return value of read/write simcalls is not calculated correctly in case
of operations crossing page boundary and in case of short reads/writes.
Read and write simcalls should return the size of data actually
read/written or -1 in case of error.
Cc: qemu-stable@nongnu.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
(cherry picked from commit 347ec03093f9668a379ef6b7fa1feb332fff039c) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Filippov [Fri, 12 May 2017 18:17:01 +0000 (11:17 -0700)]
target/xtensa: fix mapping direction in read/write simcalls
Read and write simcalls map physical memory to access I/O buffers, but
'read' simcall need to map it for writing and 'write' simcall need to
map it for reading, i.e. the opposite of what they do now. Fix that.
Cc: qemu-stable@nongnu.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
(cherry picked from commit 30c2afd151cbc38c012f7b441088980807183da6) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
John Snow [Wed, 10 May 2017 17:39:45 +0000 (13:39 -0400)]
blockdev: use drained_begin/end for qmp_block_resize
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1447551
If one tries to issue a block_resize while a guest is busy
accessing the disk, it is possible that qemu may deadlock
when invoking aio_poll from both the main loop and the iothread.
Replace another instance of bdrv_drain_all that doesn't
quite belong.
Cc: qemu-stable@nongnu.org Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 698bdfa07d66b5ec218a60229e58eae1dcde00e5) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Tue, 28 Mar 2017 20:51:27 +0000 (22:51 +0200)]
block: Add errp to b{lk,drv}_truncate()
For one thing, this allows us to drop the error message generation from
qemu-img.c and blockdev.c and instead have it unified in
bdrv_truncate().
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170328205129.15138-3-mreitz@redhat.com Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit ed3d2ec98a33fbdeabc471b11ff807075f07e996)
* prereq for 698bdfa Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Tue, 28 Mar 2017 20:51:26 +0000 (22:51 +0200)]
block/vhdx: Make vhdx_create() always set errp
This patch makes vhdx_create() always set errp in case of an error. It
also adds errp parameters to vhdx_create_bat() and
vhdx_create_new_region_table() so we can pass on the error object
generated by blk_truncate() as of a future commit.
Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20170328205129.15138-2-mreitz@redhat.com Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit 55b9392b98e500399f2da1edc1d110bbfd40fb05)
* prereq for 698bdfa Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Anton Nefedov [Wed, 26 Apr 2017 08:33:15 +0000 (11:33 +0300)]
qemu-img: wait for convert coroutines to complete
On error path (like i/o error in one of the coroutines), it's required to
- wait for coroutines completion before cleaning the common structures
- reenter dependent coroutines so they ever finish
Cc: qemu-stable@nongnu.org Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit b91127edd0ff96f27f1e58e47f4e9f9d6a0fed02) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Stefan Hajnoczi [Mon, 8 May 2017 18:07:05 +0000 (14:07 -0400)]
aio: add missing aio_notify() to aio_enable_external()
The main loop uses aio_disable_external()/aio_enable_external() to
temporarily disable processing of external AioContext clients like
device emulation.
This allows monitor commands to quiesce I/O and prevent the guest from
submitting new requests while a monitor command is in progress.
The aio_enable_external() API is currently broken when an IOThread is in
aio_poll() waiting for fd activity when the main loop re-enables
external clients. Incrementing ctx->external_disable_cnt does not wake
the IOThread from ppoll(2) so fd processing remains suspended and leads
to unresponsive emulated devices.
This patch adds an aio_notify() call to aio_enable_external() so the
IOThread is kicked out of ppoll(2) and will re-arm the file descriptors.
Zhiyong Yang [Thu, 4 May 2017 16:25:36 +0000 (00:25 +0800)]
hw/virtio: fix vhost user fails to startup when MQ
Qemu2.7~2.9 and vhost user for dpdk 17.02 release work together
to cause failures of new connection when negotiating to set MQ.
(one queue pair works well).
Because there exist some bugs in qemu code when introducing
VHOST_USER_PROTOCOL_F_REPLY_ACK to qemu. When vhost_user_set_mem_table
is invoked to deal with the vhost message VHOST_USER_SET_MEM_TABLE
for the second time, qemu indeed doesn't send the messge (The message
needs to be sent only once)but still will be waiting for dpdk's reply
ack, then, qemu is always freezing, while DPDK is always waiting for
next vhost message from qemu.
The patch aims to fix the bug, MQ can work well.
The same bug is found in function vhost_user_net_set_mtu, it is fixed
at the same time.
DPDK related patch is as following:
http://www.dpdk.org/dev/patchwork/patch/23955/
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com> Cc: qemu-stable@nongnu.org Fixes: ca525ce5618b ("vhost-user: Introduce a new protocol feature REPLY_ACK.") Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Jens Freimann <jfreiman@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
(cherry picked from commit 60cd11024f41cc73175e651a2dfe09a3cade56bb) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Fam Zheng [Tue, 2 May 2017 16:35:53 +0000 (00:35 +0800)]
block: Reuse bs as backing hd for drive-backup sync=none
Opening the backing image for the second time is bad, especially here
when it is also in use as the active image as the source. The
drive-backup job itself doesn't read from target->backing for COW,
instead it gets data from the write notifier, so it's not a big problem.
However, exporting the target to NBD etc. won't work, because of the
likely stale metadata cache.
Use BDRV_O_NO_BACKING in this case and manually set up the backing
BdrvChild.
Cc: qemu-stable@nongnu.org Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit fc0932fdcfc3e5cafa3641e361b681c07f639812) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Eric Blake [Thu, 27 Apr 2017 21:58:17 +0000 (16:58 -0500)]
qobject: Use simpler QDict/QList scalar insertion macros
We now have macros in place to make it less verbose to add a scalar
to QDict and QList, so use them.
Patch created mechanically via:
spatch --sp-file scripts/coccinelle/qobject.cocci \
--macro-file scripts/cocci-macro-file.h --dir . --in-place
then touched up manually to fix a couple of '?:' back to original
spacing, as well as avoiding a long line in monitor.c.
Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-7-eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
(cherry picked from commit 46f5ac205a9dc5e2c24274c7df371509a286281f)
* prereq for fc0932f Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Eric Blake [Wed, 5 Apr 2017 19:47:31 +0000 (14:47 -0500)]
s390x: Drop useless casts
An upcoming Coccinelle cleanup script wanted to reformat the casts
present in this file - but on closer look, we don't need the casts
at all because C automatically converts void* to any other pointer.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170405194741.18956-4-eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
(cherry picked from commit cb55c19a26d6928b445f1bd9394843c9eb60f8ab)
* prereq for 46f5ac2 Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Eric Blake [Thu, 27 Apr 2017 21:58:16 +0000 (16:58 -0500)]
qobject: Add helper macros for common scalar insertions
Rather than making lots of callers wrap a scalar in a QInt, QString,
or QBool, provide helper macros that do the wrapping automatically.
Update the Coccinelle script to make mass conversions easy, although
the conversion itself will be done as a separate patches to ease
review and backport efforts.
Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-6-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
(cherry picked from commit a92c21591b5bb9543996538f14854ca6b528318b) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Eric Blake [Thu, 27 Apr 2017 21:58:15 +0000 (16:58 -0500)]
qobject: Drop useless QObject casts
We have macros in place to make it less verbose to add a subtype
of QObject to both QDict and QList. While we have made cleanups
like this in the past (see commit fcfcd8ffc, for example), having
it be automated by Coccinelle makes it easier to maintain.
Patch created mechanically via:
spatch --sp-file scripts/coccinelle/qobject.cocci \
--macro-file scripts/cocci-macro-file.h --dir . --in-place
then I verified that no manual touchups were required.
Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-5-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
(cherry picked from commit de6e7951fe66053dfeaac1a237f7aceb9e079619) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Eric Blake [Thu, 27 Apr 2017 21:58:14 +0000 (16:58 -0500)]
coccinelle: Add script to remove useless QObject casts
We have macros in place to make it less verbose to add a subtype
of QObject to both QDict and QList. While we have made cleanups
like this in the past (see commit fcfcd8ffc, for example), having
it be automated by Coccinelle makes it easier to maintain.
The script is separate from the cleanups, for ease of review and
backporting. A later patch will then add further possible cleanups.
Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-4-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
(cherry picked from commit a2f3453ebc64b1ebe094aeaf83f9e67896f90ac3) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Greg Kurz [Thu, 25 May 2017 08:30:13 +0000 (10:30 +0200)]
9pfs: local: fix unlink of alien files in mapped-file mode
When trying to remove a file from a directory, both created in non-mapped
mode, the file remains and EBADF is returned to the guest.
This is a regression introduced by commit "df4938a6651b 9pfs: local:
unlinkat: don't follow symlinks" when fixing CVE-2016-9602. It changed the
way we unlink the metadata file from
ret = remove("$dir/.virtfs_metadata/$name");
if (ret < 0 && errno != ENOENT) {
/* Error out */
}
/* Ignore absence of metadata */
to
fd = openat("$dir/.virtfs_metadata")
unlinkat(fd, "$name")
if (ret < 0 && errno != ENOENT) {
/* Error out */
}
/* Ignore absence of metadata */
If $dir was created in non-mapped mode, openat() fails with ENOENT and
we pass -1 to unlinkat(), which fails in turn with EBADF.
We just need to check the return of openat() and ignore ENOENT, in order
to restore the behaviour we had with remove().
Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Eric Blake <eblake@redhat.com>
[groug: rewrote the comments as suggested by Eric]
Bruce Rogers [Thu, 27 Apr 2017 19:59:08 +0000 (13:59 -0600)]
ACPI: don't call acpi_pcihp_device_plug_cb on xen
Commit f0c9d64a exposed the issue that with a xenfv machine using
pci passthrough, acpi pci hotplug code was being executed by mistake.
Guard calls to acpi_pcihp_device_plug_cb (and corresponding
acpi_pcihp_device_unplug_cb) with a check for xen_enabled(). Without
this check I am seeing an error that the bus doesn't have the
acpi-pcihp-bsel property set.
Signed-off-by: Bruce Rogers <brogers@suse.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 153eba4726dfa1bdfc31d1fe973b2a61b9035492) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Thu, 13 Apr 2017 15:43:34 +0000 (17:43 +0200)]
block: Do not unref bs->file on error in BD's open
The block layer takes care of removing the bs->file child if the block
driver's bdrv_open()/bdrv_file_open() implementation fails. The block
driver therefore does not need to do so, and indeed should not unless it
sets bs->file to NULL afterwards -- because if this is not done, the
bdrv_unref_child() in bdrv_open_inherit() will dereference the freed
memory block at bs->file afterwards, which is not good.
We can now decide whether to add a "bs->file = NULL;" after each of the
offending bdrv_unref_child() invocations, or just drop them altogether.
The latter is simpler, so let's do that.
Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit de234897b60e034ba94b307fc289e2dc692c9251) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
If a pci device is not reset by VM (by writing into config space)
and unplugged by VM, after that when VM reboots, qemu may assert:
pcibus_reset: Assertion `bus->irq_count[i] == 0' failed
Cc: qemu-stable@nongnu.org Signed-off-by: herongguang <herongguang.he@huawei.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 3936161f1fd72d1dfa577aaba910819c5e873260) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
migration: setup bi-directional I/O channel for exec: protocol
Historically the migration data channel has only needed to be
unidirectional. Thus the 'exec:' protocol was requesting an
I/O channel with O_RDONLY on incoming side, and O_WRONLY on
the outgoing side.
This is fine for classic migration, but if you then try to run
TLS over it, this fails because the TLS handshake requires a
bi-directional channel.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit 062d81f0e968fe1597474735f3ea038065027372) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Thu, 13 Apr 2017 16:06:25 +0000 (18:06 +0200)]
iotests/051: Add test for empty filename
Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 42dc10f17a7f1754d419e715114c37f5c5fde12f) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This patch fixes this to be:
$ ./qemu-img info ''
qemu-img: Could not open '': The 'file' block driver requires a file
name
Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 4a0082401a770261b85625a41eef4a4e89ad7a74) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Thu, 13 Apr 2017 20:34:01 +0000 (22:34 +0200)]
qemu-img/convert: Move bs_n > 1 && -B check down
It does not make much sense to use a backing image for the target when
you concatenate multiple images (because then there is no correspondence
between the source images' backing files and the target's); but it was
still possible to give one by using -o backing_file=X instead of -B X.
Fix this by moving the check.
(Also, change the error message because -B is not the only way to
specify the backing file, evidently.)
Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
* applied patch from v1 of series as suggested by author Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Thu, 13 Apr 2017 20:34:00 +0000 (22:34 +0200)]
qemu-img/convert: Use @opts for one thing only
After storing the creation options for the new image into @opts, we
fetch some things for our own information, like the backing file name,
or whether to use encryption or preallocation.
With the -n parameter, there will not be any creation options; this is
not too bad because this just means that querying a NULL @opts will
always return the default value.
However, we also use @opts for the --object options. Therefore, @opts is
not necessarily NULL if -n was specified; instead, it may contain those
options. In practice, this probably does not cause any problems because
there most likely is no object that supports any of the parameters we
query here, but this is neither something we should rely on nor does
this variable reuse make the code very nice to read.
Therefore, just use an own variable for the --object options.
Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
* applied patch from v1 of series as suggested by author Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Max Reitz [Thu, 13 Apr 2017 20:33:59 +0000 (22:33 +0200)]
qemu-img/convert: Always set ret < 0 on error
Otherwise the qemu-img process will exit with EXIT_SUCCESS instead of
EXIT_FAILURE.
Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
* applied directly to stable, upstream code has issue fixed via a
refactoring introduced by 9fd77f9, which isn't targetted for stable Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Eric Blake [Fri, 21 Jul 2017 18:32:42 +0000 (13:32 -0500)]
dirty-bitmap: Report BlockDirtyInfo.count in bytes, as documented
We've been documenting the value in bytes since its introduction
in commit b9a9b3a4 (v1.3), where it was actually reported in bytes.
Commit e4654d2 (v2.0) then removed things from block/qapi.c, in
preparation for a rewrite to a list of dirty sectors in the next
commit 21b5683 in block.c, but the new code mistakenly started
reporting in sectors.
Fixes: https://bugzilla.redhat.com/1441460 CC: qemu-stable@nongnu.org Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 6c98c57af3f4fab85bdf5f01616c91322bd4312a) Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
qga-win: Enable 'can-offline' field in 'guest-get-vcpus' reply
The QGA schema states:
@can-offline: Whether offlining the VCPU is possible. This member
is always filled in by the guest agent when the structure
is returned, and always ignored on input (hence it can be
omitted then).
Currently 'can-offline' is missing entirely from the reply. This causes
errors in libvirt which is expecting the reply to be compliant with the
schema docs.
Peter Maydell [Tue, 18 Apr 2017 15:18:15 +0000 (16:18 +0100)]
Merge remote-tracking branch 'remotes/famz/tags/block-pull-request' into staging
# gpg: Signature made Tue 18 Apr 2017 15:58:32 BST
# gpg: using RSA key 0xCA35624C6A9171C6
# gpg: Good signature from "Fam Zheng <famz@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 5003 7CB7 9706 0F76 F021 AD56 CA35 624C 6A91 71C6
* remotes/famz/tags/block-pull-request:
block: Drain BH in bdrv_drained_begin
block: Walk bs->children carefully in bdrv_drain_recurse
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
During block job completion, nothing is preventing
block_job_defer_to_main_loop_bh from being called in a nested
aio_poll(), which is a trouble, such as in this code path:
block_job_defer_to_main_loop_bh is the last step of the stream job,
which should have been "paused" by the bdrv_drained_begin/end in
bdrv_reopen_multiple, but it is not done because it's in the form of a
main loop BH.
Similar to why block jobs should be paused between drained_begin and
drained_end, BHs they schedule must be excluded as well. To achieve
this, this patch forces draining the BH in BDRV_POLL_WHILE.
As a side effect this fixes a hang in block_job_detach_aio_context
during system_reset when a block job is ready:
#0 0x0000555555aa79f3 in bdrv_drain_recurse
#1 0x0000555555aa825d in bdrv_drained_begin
#2 0x0000555555aa8449 in bdrv_drain
#3 0x0000555555a9c356 in blk_drain
#4 0x0000555555aa3cfd in mirror_drain
#5 0x0000555555a66e11 in block_job_detach_aio_context
#6 0x0000555555a62f4d in bdrv_detach_aio_context
#7 0x0000555555a63116 in bdrv_set_aio_context
#8 0x0000555555a9d326 in blk_set_aio_context
#9 0x00005555557e38da in virtio_blk_data_plane_stop
#10 0x00005555559f9d5f in virtio_bus_stop_ioeventfd
#11 0x00005555559fa49b in virtio_bus_stop_ioeventfd
#12 0x00005555559f6a18 in virtio_pci_stop_ioeventfd
#13 0x00005555559f6a18 in virtio_pci_reset
#14 0x00005555559139a9 in qdev_reset_one
#15 0x0000555555916738 in qbus_walk_children
#16 0x0000555555913318 in qdev_walk_children
#17 0x0000555555916738 in qbus_walk_children
#18 0x00005555559168ca in qemu_devices_reset
#19 0x000055555581fcbb in pc_machine_reset
#20 0x00005555558a4d96 in qemu_system_reset
#21 0x000055555577157a in main_loop_should_exit
#22 0x000055555577157a in main_loop
#23 0x000055555577157a in main
The rationale is that the loop in block_job_detach_aio_context cannot
make any progress in pausing/completing the job, because bs->in_flight
is 0, so bdrv_drain doesn't process the block_job_defer_to_main_loop
BH. With this patch, it does.
Reported-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170418143044.12187-3-famz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Tested-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com>
block: Walk bs->children carefully in bdrv_drain_recurse
The recursive bdrv_drain_recurse may run a block job completion BH that
drops nodes. The coming changes will make that more likely and use-after-free
would happen without this patch
Stash the bs pointer and use bdrv_ref/bdrv_unref in addition to
QLIST_FOREACH_SAFE to prevent such a case from happening.
Since bdrv_unref accesses global state that is not protected by the AioContext
lock, we cannot use bdrv_ref/bdrv_unref unconditionally. Fortunately the
protection is not needed in IOThread because only main loop can modify a graph
with the AioContext lock held.
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170418143044.12187-2-famz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Tested-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com>
Greg Kurz [Mon, 17 Apr 2017 08:53:23 +0000 (10:53 +0200)]
9pfs: local: set the path of the export root to "."
The local backend was recently converted to using "at*()" syscalls in order
to ensure all accesses happen below the shared directory. This requires that
we only pass relative paths, otherwise the dirfd argument to the "at*()"
syscalls is ignored and the path is treated as an absolute path in the host.
This is actually the case for paths in all fids, with the notable exception
of the root fid, whose path is "/". This causes the following backend ops to
act on the "/" directory of the host instead of the virtfs shared directory
when the export root is involved:
- lstat
- chmod
- chown
- utimensat
ie, chmod /9p_mount_point in the guest will be converted to chmod / in the
host for example. This could cause security issues with a privileged QEMU.
All "*at()" syscalls are being passed an open file descriptor. In the case
of the export root, this file descriptor points to the path in the host that
was passed to -fsdev.
The fix is thus as simple as changing the path of the export root fid to be
"." instead of "/".
This is CVE-2017-7471.
Cc: qemu-stable@nongnu.org Reported-by: Léo Gaspard <leo@gaspard.io> Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Max Reitz [Tue, 11 Apr 2017 14:50:50 +0000 (16:50 +0200)]
block/io: Comment out permission assertions
In case of block migration, there may be writes to BlockBackends that do
not have the write permission taken. Before this issue is fixed (which
is not going to happen in 2.9), we therefore cannot assert that this is
the case.
Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Tested-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20170411145050.31290-1-mreitz@redhat.com Tested-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Kevin Wolf [Tue, 11 Apr 2017 14:08:53 +0000 (16:08 +0200)]
sheepdog: Fix crash in co_read_response()
This fixes a regression introduced in commit 9d456654.
aio_co_wake() can only be used to reenter a coroutine that was already
previously entered, otherwise co->ctx is uninitialised and we access
garbage. Using it immediately after qemu_coroutine_create() like in
co_read_response() is wrong and causes segfaults.
Replace the call with aio_co_enter(), which gets an explicit AioContext
parameter and works even for new coroutines.
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Tested-by: Kashyap Chamarthy <kchamart@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1491919733-21065-1-git-send-email-kwolf@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Tue, 11 Apr 2017 13:53:32 +0000 (14:53 +0100)]
Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2017-04-11' into staging
Block patches for 2.9.0-rc4
# gpg: Signature made Tue 11 Apr 2017 14:40:07 BST
# gpg: using RSA key 0xF407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1 1829 F407 DB00 61D5 CF40
* remotes/maxreitz/tags/pull-block-2017-04-11:
iscsi: Fix iscsi_create
throttle: Remove block from group on hot-unplug
block: pass the right options for BlockDriver.bdrv_open()
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Since d5895fcb (iscsi: Split URL into individual options), creating
qcow2 image on an iscsi LUN fails:
qemu-img create -f qcow2 iscsi://$SERVER/$IQN/0 1G
qemu-img: iscsi://$SERVER/$IQN/0: Could not create image: Invalid
argument
The problem is iscsi_open now expects that transport_name, portal and
target are already parsed into structured options by
iscsi_parse_filename, but it is not called in iscsi_create.
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 20170410075451.21329-1-famz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com>
[mreitz: Dropped now superfluous
qdict_put(bs_options, "filename", ...)] Signed-off-by: Max Reitz <mreitz@redhat.com>
Eric Blake [Thu, 6 Apr 2017 19:08:47 +0000 (14:08 -0500)]
throttle: Remove block from group on hot-unplug
When a block device that is part of a throttle group is hot-unplugged,
we forgot to remove it from the throttle group. This leaves stale
memory around, and causes an easily reproducible crash:
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1428810 Suggested-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Eric Blake <eblake@redhat.com>
Message-id: 20170406190847.29347-1-eblake@redhat.com Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
block: pass the right options for BlockDriver.bdrv_open()
raw_open() expects the caller always passing in the right actual
@options parameter. But when trying to applying snapshot on a RBD
image, bdrv_snapshot_goto() calls raw_open() (by calling the
bdrv_open callback on the BlockDriver) with a NULL @options, and
that will result in a Segmentation fault.
For the other non-raw format drivers, it also makes sense to passing
in the actual options, althought they don't trigger the problem so
far.
Let's prepare a @options by adding the "file" key-value pair to a
copy of the actual options that were given for the node (i.e.
bs->options), and pass it to the callback.
BlockDriver.bdrv_open() expects bs->file to be NULL and just
overwrites it with the result from bdrv_open_child(). That means we
should actually make sure it's NULL because otherwise the child BDS
will have a reference count that is 1 too high. So we unconditionally
invoke bdrv_unref_child() before calling BlockDriver.bdrv_open(), and
we wrap everything in bdrv_ref()/bdrv_unref() so the BDS isn't
deleted in the meantime.
Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-id: 20170405091909.36357-2-bjsdjshi@linux.vnet.ibm.com Signed-off-by: Max Reitz <mreitz@redhat.com>
Peter Maydell [Tue, 11 Apr 2017 12:27:05 +0000 (13:27 +0100)]
Merge remote-tracking branch 'remotes/famz/tags/block-pull-request' into staging
# gpg: Signature made Tue 11 Apr 2017 13:10:55 BST
# gpg: using RSA key 0xCA35624C6A9171C6
# gpg: Good signature from "Fam Zheng <famz@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 5003 7CB7 9706 0F76 F021 AD56 CA35 624C 6A91 71C6
* remotes/famz/tags/block-pull-request:
sheepdog: Use bdrv_coroutine_enter before BDRV_POLL_WHILE
block: Fix bdrv_co_flush early return
block: Use bdrv_coroutine_enter to start I/O coroutines
qemu-io-cmds: Use bdrv_coroutine_enter
blockjob: Use bdrv_coroutine_enter to start coroutine
block: Introduce bdrv_coroutine_enter
async: Introduce aio_co_enter
coroutine: Extract qemu_aio_coroutine_enter
tests/block-job-txn: Don't start block job before adding to txn
block: Quiesce old aio context during bdrv_set_aio_context
block: Make bdrv_parent_drained_begin/end public
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
bdrv_inc_in_flight and bdrv_dec_in_flight are mandatory for
BDRV_POLL_WHILE to work, even for the shortcut case where flush is
unnecessary. Move the if block to below bdrv_dec_in_flight, and BTW fix
the variable declaration position.
Signed-off-by: Fam Zheng <famz@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
block: Use bdrv_coroutine_enter to start I/O coroutines
BDRV_POLL_WHILE waits for the started I/O by releasing bs's ctx then polling
the main context, which relies on the yielded coroutine continuing on bs->ctx
before notifying qemu_aio_context with bdrv_wakeup().
Thus, using qemu_coroutine_enter to start I/O is wrong because if the coroutine
is entered from main loop, co->ctx will be qemu_aio_context, as a result of the
"release, poll, acquire" loop of BDRV_POLL_WHILE, race conditions happen when
both main thread and the iothread access the same BDS:
Note that in above case, bdrv_drained_begin() doesn't do the "release,
poll, acquire" in BDRV_POLL_WHILE, because bs->in_flight == 0.
Fix this by using bdrv_coroutine_enter and enter coroutine in the right
context.
iotests 109 output is updated because the coroutine reenter flow during
mirror job complete is different (now through co_queue_wakeup, instead
of the unconditional qemu_coroutine_switch before), making the end job
len different.
Signed-off-by: Fam Zheng <famz@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
blockjob: Use bdrv_coroutine_enter to start coroutine
Resuming and especially starting of the block job coroutine, could be issued in
the main thread. However the coroutine's "home" ctx should be set to the same
context as job->blk. Use bdrv_coroutine_enter to ensure that.
Signed-off-by: Fam Zheng <famz@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
tests/block-job-txn: Don't start block job before adding to txn
Previously, before test_block_job_start returns, the job can already
complete, as a result, the transactional state of other jobs added to
the same txn later cannot be handled correctly.
Move the block_job_start() calls to callers after
block_job_txn_add_job() calls.
Signed-off-by: Fam Zheng <famz@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
block: Quiesce old aio context during bdrv_set_aio_context
The fact that the bs->aio_context is changing can confuse the dataplane
iothread, because of the now fine granularity aio context lock.
bdrv_drain should rather be a bdrv_drained_begin/end pair, but since
bs->aio_context is changing, we can just use aio_disable_external and
bdrv_parent_drained_begin.
Reported-by: Ed Swierk <eswierk@skyportsystems.com> Signed-off-by: Fam Zheng <famz@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Peter Maydell [Mon, 10 Apr 2017 15:08:37 +0000 (16:08 +0100)]
Merge remote-tracking branch 'remotes/gkurz/tags/for-upstream' into staging
Fixes a memory leak.
# gpg: Signature made Mon 10 Apr 2017 13:20:39 BST
# gpg: using DSA key 0x02FC3AEB0101DBC2
# gpg: Good signature from "Greg Kurz <groug@kaod.org>"
# gpg: aka "Greg Kurz <groug@free.fr>"
# gpg: aka "Greg Kurz <gkurz@linux.vnet.ibm.com>"
# gpg: aka "Gregory Kurz (Groug) <groug@free.fr>"
# gpg: aka "[jpeg image of size 3330]"
# 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: 2BD4 3B44 535E C0A7 9894 DBA2 02FC 3AEB 0101 DBC2
* remotes/gkurz/tags/for-upstream:
9pfs: xattr: fix memory leak in v9fs_list_xattr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 10 Apr 2017 14:01:15 +0000 (15:01 +0100)]
Merge remote-tracking branch 'remotes/stsquad/tags/pull-mttcg-fixups-for-rc2-100417-1' into staging
Final icount and misc MTTCG fixes for 2.9
Minor differences from:
Message-Id: <20170405132503.32125-1-alex.bennee@linaro.org>
- dropped new feature patches
- last minute typo fix from Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
# gpg: Signature made Mon 10 Apr 2017 11:38:10 BST
# gpg: using RSA key 0xFBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>"
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-mttcg-fixups-for-rc2-100417-1:
replay: assert time only goes forward
cpus: call cpu_update_icount on read
cpu-exec: update icount after each TB_EXIT
cpus: introduce cpu_update_icount helper
cpus: don't credit executed instructions before they have run
cpus: move icount preparation out of tcg_exec_cpu
cpus: check cpu->running in cpu_get_icount_raw()
cpus: remove icount handling from qemu_tcg_cpu_thread_fn
target/i386/misc_helper: wrap BQL around another IRQ generator
cpus: fix wrong define name
scripts/qemugdb/mtree.py: fix up mtree dump
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 3 Apr 2017 13:04:15 +0000 (14:04 +0100)]
configure: on Windows minimum glib version must be 2.30
In the 2.7 release we stated in the ChangeLog that the
minimum glib version for Windows hosts was 2.30, but we
didn't update configure to enforce this because we were
very close to the release at the point where we noticed
the issue, and it only affected building the test suite.
We then forgot that we needed to do it. Fix the omission.
(The reason for the 2.30 requirement is use of
g_dir_make_tmp() -- our fallback implementation uses
mkdtemp(), which isn't available on Windows.)
Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Weil <sw@weilnetz.de>
Message-id: 1491224655-5776-1-git-send-email-peter.maydell@linaro.org
Alex Bennée [Wed, 5 Apr 2017 10:05:28 +0000 (11:05 +0100)]
replay: assert time only goes forward
If we find ourselves trying to add an event to the log where time has
gone backwards it is because a vCPU event has occurred and the
main-loop is not yet aware of time moving forward. This should not
happen and if it does its better to fail early than generate a log
that will have weird behaviour.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Alex Bennée [Wed, 5 Apr 2017 09:53:47 +0000 (10:53 +0100)]
cpus: call cpu_update_icount on read
This ensures each time the vCPU thread reads the icount we update the
master timer_state.qemu_icount field. This way as long as updates are
in BQL protected sections (which they should be) the main-loop can
never come to update the log and find time has gone backwards.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Alex Bennée [Wed, 5 Apr 2017 11:35:48 +0000 (12:35 +0100)]
cpu-exec: update icount after each TB_EXIT
There is no particular reason we shouldn't update the global system
icount time as we exit each TranslationBlock run. This ensures the
main-loop doesn't have to wait until we exit to the outer loop for
executed instructions to be credited to timer_state.
The prepare_icount_for_run function is slightly tweaked to match the
logic we run in cpu_loop_exec_tb.
Based on Paolo's original suggestion.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Alex Bennée [Wed, 5 Apr 2017 11:32:37 +0000 (12:32 +0100)]
cpus: introduce cpu_update_icount helper
By holding off updates to timer_state.qemu_icount we can run into
trouble when the non-vCPU thread needs to know the time. This helper
ensures we atomically update timers_state.qemu_icount based on what
has been currently executed.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Alex Bennée [Fri, 31 Mar 2017 15:09:42 +0000 (16:09 +0100)]
cpus: don't credit executed instructions before they have run
Outside of the vCPU thread icount time will only be tracked against
timers_state.qemu_icount. We no longer credit cycles until they have
completed the run. Inside the vCPU thread we adjust for passage of
time by looking at how many have run so far. This is only valid inside
the vCPU thread while it is running.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Alex Bennée [Thu, 30 Mar 2017 17:49:22 +0000 (18:49 +0100)]
cpus: check cpu->running in cpu_get_icount_raw()
The lifetime of current_cpu is now the lifetime of the vCPU thread.
However get_icount_raw() can apply a fudge factor if called while code
is running to take into account the current executed instruction
count.
To ensure this is always the case we also check cpu->running.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
Alex Bennée [Thu, 30 Mar 2017 17:32:29 +0000 (18:32 +0100)]
cpus: remove icount handling from qemu_tcg_cpu_thread_fn
We should never be running in multi-threaded mode with icount enabled.
There is no point calling handle_icount_deadline here so remove it and
assert !use_icount.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
Alex Bennée [Tue, 21 Mar 2017 16:26:27 +0000 (16:26 +0000)]
scripts/qemugdb/mtree.py: fix up mtree dump
Since QEMU has been able to build with native Int128 support this was
broken as it attempts to fish values out of the non-existent
structure. Also the alias print was trying to make a %x out of
gdb.ValueType directly which didn't seem to work.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Peter Maydell [Fri, 7 Apr 2017 14:23:48 +0000 (15:23 +0100)]
Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
Block layer fixes for 2.9.0-rc4
# gpg: Signature made Fri 07 Apr 2017 13:44:17 BST
# gpg: using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6
* remotes/kevin/tags/for-upstream:
mirror: Fix aio context of mirror_top_bs
block: Assert attached child node has right aio context
block: Fix unpaired aio_disable_external in external snapshot
block: Don't check permissions for copy on read
qemu-img: img_create does not support image-opts, fix docs
iotests: Add mirror tests for orphaned source
block/mirror: Fix use-after-free
commit: Set commit_top_bs->total_sectors
commit: Set commit_top_bs->aio_context
block: Ignore guest dev permissions during incoming migration
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
It should be moved to the same context as source, before inserting to the
graph.
Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block: Fix unpaired aio_disable_external in external snapshot
bdrv_replace_child_noperm tries to hand over the quiesce_counter state
from old bs to the new one, but if they are not on the same aio context
this causes unbalance.
Fix this by setting the correct aio context before calling
bdrv_append().
Reported-by: Ed Swierk <eswierk@skyportsystems.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Kevin Wolf [Fri, 7 Apr 2017 10:29:05 +0000 (12:29 +0200)]
block: Don't check permissions for copy on read
The assertion is currently failing. We can't require callers to have
write permissions when all they are doing is a read, so comment it out.
Add a FIXME comment in the code so that the check is re-enabled when
copy on read is refactored into its own filter driver.
Reported-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Jeff Cody [Thu, 6 Apr 2017 17:45:42 +0000 (13:45 -0400)]
qemu-img: img_create does not support image-opts, fix docs
The documentation and help for qemu-img claims that 'qemu-img create'
will take the '--image-opts' argument. This is not true, so this
patch removes those claims.
Signed-off-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Max Reitz [Mon, 3 Apr 2017 17:51:50 +0000 (19:51 +0200)]
iotests: Add mirror tests for orphaned source
Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Max Reitz [Mon, 3 Apr 2017 17:51:49 +0000 (19:51 +0200)]
block/mirror: Fix use-after-free
If @bs does not have any parents, the only reference to @mirror_top_bs
will be held by the BlockJob object after the bdrv_unref() following
block_job_create(). However, if block_job_create() fails, this reference
will not exist and @mirror_top_bs will have been deleted when we
goto fail.
The issue comes back at all later entries to the fail label: We delete
the BlockJob object before rolling back our changes to the node graph.
This means that we will delete @mirror_top_bs in the process.
All in all, whenever @bs does not have any parents and we go down the
fail path we will dereference @mirror_top_bs after it has been deleted.
Fix this by invoking bdrv_unref() only when block_job_create() was
successful and by bdrv_ref()'ing @mirror_top_bs in the fail path before
deleting the BlockJob object. Finally, bdrv_unref() it at the end of the
fail path after we actually no longer need it.
Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Kevin Wolf [Thu, 6 Apr 2017 17:07:14 +0000 (19:07 +0200)]
commit: Set commit_top_bs->total_sectors
Like in the mirror filter driver, we also need to set the image size for
the commit filter driver. This is less likely to be a problem in
practice than for the mirror because we're not at the active layer here,
but attaching new parents to a node in the middle of the chain is
possible, so the size needs to be correct anyway.
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com>
Kevin Wolf [Tue, 4 Apr 2017 15:29:03 +0000 (17:29 +0200)]
block: Ignore guest dev permissions during incoming migration
Usually guest devices don't like other writers to the same image, so
they use blk_set_perm() to prevent this from happening. In the migration
phase before the VM is actually running, though, they don't have a
problem with writes to the image. On the other hand, storage migration
needs to be able to write to the image in this phase, so the restrictive
blk_set_perm() call of qdev devices breaks it.
This patch flags all BlockBackends with a qdev device as
blk->disable_perm during incoming migration, which means that the
requested permissions are stored in the BlockBackend, but not actually
applied to its root node yet.
Once migration has finished and the VM should be resumed, the
permissions are applied. If they cannot be applied (e.g. because the NBD
server used for block migration hasn't been shut down), resuming the VM
fails.
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Since commit cd958edb1fae85d, same size console resize is skipped. This
change broke QXL incoming migration in VGA mode,
qemu_spice_display_switch() is no longer called during qxl_post_load(),
because default message surface is of the same size, and during
displaychangelistener registration, PCIQXLDevice.mode is
QXL_MODE_UNDEFINED. This triggers a later crash on refresh:
==2634== Invalid read of size 4
==3516== at 0x65F3050: pixman_image_get_data (in /usr/lib64/libpixman-1.so.0.34.0)
==3516== by 0x6F0CEB: qemu_spice_create_update (spice-display.c:215)
==3516== by 0x6F1CC7: qemu_spice_display_refresh (spice-display.c:502)
==3516== by 0x58CF77: display_refresh (qxl.c:1948)
==3516== by 0x6E8084: do_safe_dpy_refresh (console.c:1591)
==3516== by 0x6E80D5: dpy_refresh (console.c:1604)
==3516== by 0x6E4508: gui_update (console.c:201)
==3516== by 0x81898E: timerlist_run_timers (qemu-timer.c:536)
==3516== by 0x8189D6: qemu_clock_run_timers (qemu-timer.c:547)
==3516== by 0x818D98: qemu_clock_run_all_timers (qemu-timer.c:662)
==3516== by 0x81952A: main_loop_wait (main-loop.c:514)
==3516== by 0x4ADD29: main_loop (vl.c:1898)
One way to solve this is to explicitely call qemu_spice_display_switch()
on entering VGA mode, which is called during qxl_post_load().
Fixes:
"null pointer access on migration resume of systemrescuecd boot menu with qxl-vga"
https://bugs.launchpad.net/qemu/+bug/1679126
https://bugzilla.redhat.com/show_bug.cgi?id=1438566
Alex Williamson [Thu, 6 Apr 2017 22:03:26 +0000 (16:03 -0600)]
vfio/pci-quirks: Exclude non-ioport BAR from NVIDIA quirk
The NVIDIA BAR5 quirk is targeting an ioport BAR. Some older devices
have a BAR5 which is not ioport and can induce a segfault here. Test
the BAR type to skip these devices.
Paolo Bonzini [Wed, 5 Apr 2017 08:11:36 +0000 (10:11 +0200)]
tco: do not generate an NMI
This behavior is not indicated in the datasheet and can confuse the OS.
The TCO can trap NMIs from SERR# or IOCHK# and convert them to SMIs; but
any other TCO event is either delivered as an SMI or completely disabled.
Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Peter Maydell [Tue, 4 Apr 2017 17:00:23 +0000 (18:00 +0100)]
Merge remote-tracking branch 'remotes/gkurz/tags/for-upstream' into staging
Some 9pfs bugs fixes: potential hang at reset, migration blocker leak.
# gpg: Signature made Tue 04 Apr 2017 17:07:55 BST
# gpg: using DSA key 0x02FC3AEB0101DBC2
# gpg: Good signature from "Greg Kurz <groug@kaod.org>"
# gpg: aka "Greg Kurz <groug@free.fr>"
# gpg: aka "Greg Kurz <gkurz@linux.vnet.ibm.com>"
# gpg: aka "Gregory Kurz (Groug) <groug@free.fr>"
# gpg: aka "[jpeg image of size 3330]"
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# Primary key fingerprint: 2BD4 3B44 535E C0A7 9894 DBA2 02FC 3AEB 0101 DBC2
* remotes/gkurz/tags/for-upstream:
9pfs: clear migration blocker at session reset
9pfs: fix multiple flush for same request
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Greg Kurz [Tue, 4 Apr 2017 16:06:01 +0000 (18:06 +0200)]
9pfs: clear migration blocker at session reset
The migration blocker survives a device reset: if the guest mounts a 9p
share and then gets rebooted with system_reset, it will be unmigratable
until it remounts and umounts the 9p share again.
This happens because the migration blocker is supposed to be cleared when
we put the last reference on the root fid, but virtfs_reset() wrongly calls
free_fid() instead of put_fid().
This patch fixes virtfs_reset() so that it honor the way fids are supposed
to be manipulated: first get a reference and later put it back when you're
done.
Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Li Qiang <liqiang6-s@360.cn>
Greg Kurz [Tue, 4 Apr 2017 16:06:01 +0000 (18:06 +0200)]
9pfs: fix multiple flush for same request
If a client tries to flush the same outstanding request several times, only
the first flush completes. Subsequent ones keep waiting for the request
completion in v9fs_flush() and, therefore, leak a PDU. This will cause QEMU
to hang when draining active PDUs the next time the device is reset.
Let have each flush request wake up the next one if any. The last waiter
frees the cancelled PDU.
Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Eric Blake <eblake@redhat.com>
pci: Only unmap bus_master_enabled_region if was added previously
Normally pci_init_bus_master() would be called either via
bus->machine_done.notify or directly from do_pci_register_device().
However if a device's realize() failed, pci_init_bus_master() is not
called, and do_pci_unregister_device() fails on
memory_region_del_subregion() as it was not mapped.
This adds a check that subregion was mapped before unmapping it.
Fixes: c53598ed18e4 ("pci: Add missing drop of bus master AS reference") Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Tested-by: John Snow <jsnow@redhat.com>
The qio_dns_resolver_lookup_sync() method is required to be a no-op
for socket kinds that don't require name resolution. Thus the KIND_FD
handling should not return an error.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Wang guang [Mon, 3 Apr 2017 11:05:21 +0000 (12:05 +0100)]
io: fix incoming client socket initialization
The channel socket was initialized manually, but forgot to set
QIO_CHANNEL_FEATURE_SHUTDOWN. Thus, the colo_process_incoming_thread
would hang at recvmsg. This patch just call qio_channel_socket_new to
get channel, Which set QIO_CHANNEL_FEATURE_SHUTDOWN already.
Signed-off-by: Wang Guang<wang.guang55@zte.com.cn> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Peter Maydell [Fri, 31 Mar 2017 12:36:41 +0000 (13:36 +0100)]
tests/libqtest.c: Delete possible stale unix sockets
Occasionally if a test crashes or is interrupted by the user
at the wrong moment it could leave behind a stale UNIX
socket in /tmp/. This will then cause a subsequent test
run to fail spuriously with
tests/libqtest.c:70:init_socket: assertion failed (ret != -1): (-1 != -1)
if it happens to reuse the same PID.
Defend against this by deleting any stray stale socket before
trying to open the new ones for this test.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1490963801-27870-1-git-send-email-peter.maydell@linaro.org
main-loop: Acquire main_context lock around os_host_main_loop_wait.
When running virt-rescue the serial console hangs from time to time.
Virt-rescue runs an ordinary Linux kernel "appliance", but there is
only a single idle process running inside, so the qemu main loop is
largely idle. With virt-rescue >= 1.37 you may be able to observe the
hang by doing:
$ virt-rescue -e ^] --scratch
><rescue> while true; do ls -l /usr/bin; done
The hang in virt-rescue can be resolved by pressing a key on the
serial console.
Possibly with the same root cause, we also observed hangs during very
early boot of regular Linux VMs with a serial console. Those hangs
are extremely rare, but you may be able to observe them by running
this command on baremetal for a sufficiently long time:
$ while libguestfs-test-tool -t 60 >& /tmp/log ; do echo -n . ; done
(Check in /tmp/log that the failure was caused by a hang during early
boot, and not some other reason)
During investigation of this bug, Paolo Bonzini wrote:
> glib is expecting QEMU to use g_main_context_acquire around accesses to
> GMainContext. However QEMU is not doing that, instead it is taking its
> own mutex. So we should add g_main_context_acquire and
> g_main_context_release in the two implementations of
> os_host_main_loop_wait; these should undo the effect of Frediano's
> glib patch.
This patch exactly implements Paolo's suggestion in that paragraph.
This fixes the serial console hang in my testing, across 3 different
physical machines (AMD, Intel Core i7 and Intel Xeon), over many hours
of automated testing. I wasn't able to reproduce the early boot hangs
(but as noted above, these are extremely rare in any case).
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1435432 Reported-by: Richard W.M. Jones <rjones@redhat.com> Tested-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Message-Id: <20170331205133.23906-1-rjones@redhat.com>
[Paolo: this is actually a glib bug: recent glib versions are also
expecting g_main_context_acquire around g_poll---but that is not
documented and probably not even intended]. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Peter Maydell [Mon, 3 Apr 2017 15:43:39 +0000 (16:43 +0100)]
Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2017-04-03' into staging
Block patches for 2.9-rc3
# gpg: Signature made Mon 03 Apr 2017 16:29:49 BST
# gpg: using RSA key 0xF407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1 1829 F407 DB00 61D5 CF40
* remotes/maxreitz/tags/pull-block-2017-04-03:
block/parallels: Avoid overflows
iotests: Improve image-clear tests on non-aligned image
qcow2: Discard unaligned tail when wiping image
iotests: fix 097 when run with qcow
qemu-io-cmds: Assert that global and nofile commands don't use ct->perms
sheepdog: Fix blockdev-add
nbd: Tidy up blockdev-add interface
sockets: New helper socket_address_crumple()
qapi-schema: SocketAddressFlat variants 'vsock' and 'fd'
gluster: Prepare for SocketAddressFlat extension
block: Document -drive problematic code and bugs
io vnc sockets: Clean up SocketAddressKind switches
char: Fix socket with "type": "vsock" address
nbd sockets vnc: Mark problematic address family tests TODO
block: add missed aio_context_acquire into release_drive
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Max Reitz [Fri, 31 Mar 2017 17:05:12 +0000 (19:05 +0200)]
block/parallels: Avoid overflows
Change the types of variables in allocate_clusters() to int64_t so we do
not have to worry about potential overflows.
Add an assertion that our accesses to s->bat[] do not result in a buffer
overflow and that the implicit conversion performed when invoking
bat_entry_off() does not result in an integer overflow.
Coverity-id: 1307776 Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170331170512.10381-1-mreitz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Max Reitz <mreitz@redhat.com>
Eric Blake [Fri, 31 Mar 2017 18:53:56 +0000 (13:53 -0500)]
iotests: Improve image-clear tests on non-aligned image
Tweak 097 and 176 to operate on an image that is not cluster-aligned,
to give further coverage of clearing out an entire image, including
the recent fix to eliminate the difference between fast path (97) and
slow (176) for qcow2. Also tested on qcow (97 only, since qcow lacks
snapshots).
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-id: 20170331185356.2479-4-eblake@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
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