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2014-03-06blockdev: Fix NULL pointer dereference in blockdev-addKevin Wolf1-2/+4
If aio=native, we check that cache.direct is set as well. If however cache wasn't specified at all, qemu just segfaulted. The old condition didn't make any sense anyway because it effectively only checked for the default cache mode case, but not for an explicitly set cache.direct=off mode. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Eric Blake <eblake@redhat.com>
2014-03-06blockdev: Fail blockdev-add with encrypted imagesKevin Wolf1-1/+8
Encrypted images need a password before they can be used, and we don't want blockdev-add to create BDSes that aren't fully initialised. So for now simply forbid encrypted images; we can come back to it later if we need the functionality. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2014-02-21block: Add reference parameter to bdrv_open()Max Reitz1-6/+6
Allow bdrv_open() to handle references to existing block devices just as bdrv_file_open() is already capable of. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-02-21block: Change BDS parameter of bdrv_open() to **Max Reitz1-11/+9
Make bdrv_open() take a pointer to a BDS pointer, similarly to bdrv_file_open(). If a pointer to a NULL pointer is given, bdrv_open() will create a new BDS with an empty name; if the BDS pointer is not NULL, that existing BDS will be reused (in the same way as bdrv_open() already did). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-02-20Merge remote-tracking branch 'remotes/afaerber/tags/qom-devices-for-peter' ↵Peter Maydell1-0/+4
into staging QOM infrastructure fixes and device conversions * QTest cleanups and test cases for PCI NICs * NAND fix for "info qtree" * Cleanup and extension of QOM machine tests * IndustryPack test cases and conversion to QOM realize * I2C cleanups * Cleanups of legacy qdev properties # gpg: Signature made Mon 17 Feb 2014 22:15:37 GMT using RSA key ID 3E7E013F # gpg: Good signature from "Andreas Färber <afaerber@suse.de>" # gpg: aka "Andreas Färber <afaerber@suse.com>" * remotes/afaerber/tags/qom-devices-for-peter: (49 commits) qtest: Include system headers before user headers qapi: Refine human printing of sizes qdev: Use QAPI type names for properties qdev: Add enum property types to QAPI schema block: Handle "rechs" and "large" translation options qdev: Remove hex8/32/64 property types qdev: Remove most legacy printers qdev: Use human mode in "info qtree" qapi: Add human mode to StringOutputVisitor qdev: Inline qdev_prop_parse() qdev: Legacy properties are just strings qdev: Legacy properties are now read-only qdev: Remove legacy parsers for hex8/32/64 qdev: Sizes are now parsed by StringInputVisitor qapi: Add size parser to StringInputVisitor qtest: Don't segfault with invalid -qtest option ipack: Move IndustryPack out of hw/char/ ipoctal232: QOM parent field cleanup ipack: QOM parent field cleanup for IPackDevice ipack: QOM parent field cleanup for IPackBus ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-02-20Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into stagingPeter Maydell1-21/+21
* remotes/qmp-unstable/queue/qmp: monitor: Add object_add class argument completion. monitor: Add object_del id argument completion. monitor: Add device_add device argument completion. monitor: Add device_del id argument completion. qmp: expose list of supported character device backends Use error_is_set() only when necessary QMP: allow JSON dict arguments in qmp-shell hmp: migrate command (without -d) now blocks correctly Conflicts: blockdev.c [PMM: resolved trivial conflict in blockdev.c] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-02-17Use error_is_set() only when necessaryMarkus Armbruster1-21/+21
error_is_set(&var) is the same as var != NULL, but it takes whole-program analysis to figure that out. Unnecessarily hard for optimizers, static checkers, and human readers. Dumb it down to obvious. Gets rid of several dozen Coverity false positives. Note that the obvious form is already used in many places. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-02-14block: Handle "rechs" and "large" translation optionsPaolo Bonzini1-0/+4
Sure, CHS translation is an obscure topic, and legacy options for hard-disk geometries are obscure as well. But since QEMU does nothing with it except telling the BIOS, and since there "large" and "rechs" are listed in the enums, parsing them seems to be the bare minimum. Acked-by: Stefan Hajnoczi <stefanha@gmail.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-02-14block: Open by reference will try device then node_name.Benoît Canet1-0/+6
Since we introduced node_name for named bs of the graph modify the opening by reference to use it as a fallback. This patch also enforce the separation of the device id and graph node namespaces. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-02-14blockdev: Fix wrong usage of QDECREF causing snapshoted quorum to crash on ↵Benoît Canet1-2/+0
close. As bdrv_open() documentation states: "The reference to the QDict belongs to the block layer * after the call (even on failure), so if the caller intends to reuse the * dictionary, it needs to use QINCREF() before calling bdrv_open." the optional options dict will not be reused after bdrv_open() and should belong to the block layer so remove the extra QDECREF(options). Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-02-14blockdev: Remove 'type' parameter from blockdev_init()Kevin Wolf1-14/+33
blockdev-add doesn't know about the device that the backend will be attached to, this is a legacy -drive concept. Move the remaining checks that use it to drive_init(). [Fam Zheng <famz@redhat.com> suggested line-wrapping to 80 chars as required by the coding standard. I have fixed this. --Stefan] Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-01-24qmp: Allow to take external snapshots on bs graphs node.Benoît Canet1-7/+48
Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-01-24qmp: Allow block_resize to manipulate bs graph nodes.Benoît Canet1-4/+14
Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-01-24block: Create authorizations mechanism for external snapshot and resize.Benoît Canet1-1/+1
Signed-off-by: Benoit Canet <benoit@irqsave.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-01-24qmp: Allow to change password on named block driver states.Benoît Canet1-4/+9
Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Fam Zheng <famz@redhat.com> There was two candidate ways to implement named node manipulation: 1) { 'command': 'block_passwd', 'data': {'*device': 'str', '*node-name': 'str', 'password': 'str'} } 2) { 'command': 'block_passwd', 'data': {'device': 'str', '*device-is-node': 'bool', 'password': 'str'} } Luiz proposed 1 and says 2 was an abuse of the QMP interface and proposed to rewrite the QMP block interface for 2.0. Luiz does not like in 1 the fact that 2 fields are optional but one of them must be specified leading to an abuse of the QMP semantic. Kevin argumented that 2 what a clear abuse of the device field and would not be practical when reading fast some log file because the user would read "device" and think that a device is manipulated when it's in fact a node name. Documentation of 1 make it pretty clear what to do for the user. Kevin argued that all bs are node including devices ones so 2 does not make sense. Kevin also argued that rewriting the QMP block interface would not make disapear the current one. Kevin pushed the argument that making the QAPI generator compatible with the semantic of the operation would need a rewrite that no one has done yet. A vote has been done on the list to elect the version to use and 1 won. For reference the complete thread is: "[Qemu-devel] [PATCH V4 4/7] qmp: Allow to change password on names block driver states." Signed-off-by: Benoit Canet <benoit@irqsave.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-01-24qmp: Add QMP query-named-block-nodes to list the named BlockDriverState nodes.Benoît Canet1-0/+5
Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-01-22blockdev: Move "file" to legacy_optsMax Reitz1-9/+10
Specifying the image filename through the "file" option is a legacy option and should not be supported by blockdev-add (in that case, giving a string for "file" references an existing block device). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-01-14Merge remote branch 'luiz/queue/qmp' into qmpqEdgar E. Iglesias1-2/+4
* luiz/queue/qmp: migration: qmp_migrate(): keep working after syntax error qerror: Remove assert_no_error() qemu-option: Remove qemu_opts_create_nofail target-i386: Remove assert_no_error usage hw: Remove assert_no_error usages qdev: Delete dead code error: Add error_abort monitor: add object-add (QMP) and object_add (HMP) command monitor: add object-del (QMP) and object_del (HMP) command qom: catch errors in object_property_add_child qom: fix leak for objects created with -object rng: initialize file descriptor to -1 qemu-monitor: HMP cpu-add wrapper vl: add missing transition debug->finish_migrate Message-Id: 1389045795-18706-1-git-send-email-lcapitulino@redhat.com Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2014-01-06qemu-option: Remove qemu_opts_create_nofailPeter Crosthwaite1-2/+4
This is a boiler-plate _nofail variant of qemu_opts_create. Remove and use error_abort in call sites. null/0 arguments needs to be added for the id and fail_if_exists fields in affected callsites due to argument inconsistency between the normal and no_fail variants. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-12-20commit: Support commit active layerFam Zheng1-2/+7
If active is top, it will be mirrored to base, (with block/mirror.c code), then the image is switched when user completes the block job. QMP documentation is updated. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-12-16qmp_change_blockdev() remove unused has_formatMarc-André Lureau1-1/+1
Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-11-27block/drive-mirror: Reuse backing HD for sync=noneMax Reitz1-0/+3
For "none" sync mode in "absolute-paths" mode, the current image should be used as the backing file for the newly created image. The current behavior is: a) If the image to be mirrored has a backing file, use that (which is wrong, since the operations recorded by "none" are applied to the image itself, not to its backing file). b) If the image to be mirrored lacks a backing file, the target doesn't have one either (which is not really wrong, but not really right, either; "none" records a set of operations executed on the image file, therefore having no backing file to apply these operations on seems rather pointless). For a, this is clearly a bugfix. For b, it is still a bugfix, although it might break existing API - but since that case crashed qemu just three weeks ago (before 1452686495922b81d6cf43edf025c1aef15965c0), we can safely assume there is no such API relying on that case yet. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1385407736-13941-2-git-send-email-mreitz@redhat.com Signed-off-by: Anthony Liguori <aliguori@amazon.com>
2013-11-14qmp: access the local QemuOptsLists for drive optionAmos Kong1-1/+0
Currently we have three QemuOptsList (qemu_common_drive_opts, qemu_legacy_drive_opts, and qemu_drive_opts), only qemu_drive_opts is added to vm_config_groups[]. This patch changes query-command-line-options to access three local QemuOptsLists for drive option, and merge the description items together. Signed-off-by: Amos Kong <akong@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-11-14block/drive-mirror: Check for NULL backing_hdMax Reitz1-1/+3
It should be possible to execute the QMP "drive-mirror" command in "none" sync mode and "absolute-paths" mode even for block devices lacking a backing file. "absolute-paths" does in fact not require a backing file to be present, as can be seen from the "top" sync mode code path. "top" basically states that the device should indeed have a backing file - however, the current code catches the case if it doesn't and then simply treats it as "full" sync mode, creating a target image without a backing file (in "absolute-paths" mode). Thus, "absolute-paths" does not imply the target file must indeed have a backing file. Therefore, the target file may be left unbacked in case of "none" sync mode as well, if the specified device is not backed either. Currently, qemu will crash trying to dereference the backing file pointer since it assumes that it will always be non-NULL in that case ("none" with "absolute-paths"). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-11-07blockdev: fix drive_init() opts and bs_opts leaksStefan Hajnoczi1-12/+15
These memory leaks also make drive_add if=none,id=drive0 without a file= option leak the options list. This keeps ID "drive0" around forever. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-17blockdev: fix cdrom read_only flagFam Zheng1-3/+4
Since 0ebd24e0, cdrom doesn't have read-only on by default, which will error out when using an read only image. Fix it by setting the default value when parsing opts. Reported-by: Edivaldo de Araujo Pereira <edivaldoapereira@yahoo.com.br> Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-10-11blockdev: blockdev_init() error conversionKevin Wolf1-25/+31
This gives us meaningful error messages for the blockdev-add QMP command. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Don't disable COR automatically with blockdev-addKevin Wolf1-4/+27
If a read-only device is configured with copy-on-read=on, the old code only prints a warning and automatically disables copy on read. Make it a real error for blockdev-add. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Remove 'media' parameter from blockdev_init()Kevin Wolf1-25/+15
The remaining users shouldn't be there with blockdev-add and are easy to move to drive_init(). Bonus bug fix: As a side effect, CD-ROM drives can now use block drivers on the read-only whitelist without explicitly specifying read-only=on, even if a format is explicitly specified. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Remove IF_* check for read-only blockdev_initKevin Wolf1-6/+0
IF_NONE allows read-only, which makes forbidding it in this place for other types pretty much pointless. Instead, make sure that all devices for which the check would have errored out check in their init function that they don't get a read-only BlockDriverState. This catches even cases where IF_NONE and -device is used. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Move virtio-blk device creation to drive_initKevin Wolf1-27/+27
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Move bus/unit/index processing to drive_initKevin Wolf1-84/+73
This requires moving the automatic ID generation at the same time, so let's do that as well. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Move parsing of 'boot' option to drive_initKevin Wolf1-10/+11
It's already ignored and only prints a deprecation message. No use in making it available in new interfaces. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Moving parsing of geometry options to drive_initKevin Wolf1-67/+69
This moves all of the geometry options (cyls/heads/secs/trans) to drive_init so that they can only be accessed using legacy functions, but never with anything blockdev-add related. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Move parsing of 'if' option to drive_initKevin Wolf1-18/+22
It's always IF_NONE for blockdev-add. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Move parsing of 'media' option to drive_initKevin Wolf1-23/+50
This moves as much as possible of the processing of the 'media' option to drive_init so that it can only be accessed using legacy functions, but never with anything blockdev-add related. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Pass QDict to blockdev_init()Kevin Wolf1-17/+17
Working on a QDict instead of a QemuOpts that accepts anything is more in line with bdrv_open(). A QDict is what qmp_blockdev_add() already has anyway, so this saves additional conversions. And last, but not least, it allows later patches to easily extract legacy options into a separate, typed QemuOpts for drive_init() (the untyped QemuOpts that drive_init already has doesn't allow access to numbers, only strings, and is therefore useless without conversion). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: Separate ID generation from DriveInfo creationKevin Wolf1-15/+17
blockdev-add shouldn't automatically generate IDs, but will keep most of the DriveInfo creation code. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11blockdev: 'blockdev-add' QMP commandKevin Wolf1-0/+57
For examples see the changes to qmp-commands.hx. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-11blockdev: Introduce DriveInfo.enable_auto_delKevin Wolf1-1/+16
BlockDriverStates shouldn't be affected by an unplugged guest device, except if created with the legacy -drive command line option or the drive_add HMP command. Make the automatic deletion as well as cancelling of jobs conditional on an enable_auto_del boolean that is only set in drive_init(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
2013-10-11block: Improve driver whitelist checksKevin Wolf1-6/+2
The main intent of this patch is to consolidate the whitelist checks to a single point in the code instead of spreading it everywhere. This adds a nicer error message for read-only whitelisting, too, in places where it was still missing. The patch also contains a bonus bug fix: By finding the format first in bdrv_open() and then independently checking against the whitelist only later, we avoid the case that use of a non-whitelisted format results in probing rather than an error message. Previously, this could happen when using the driver=... option. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com>
2013-10-11block: Add BlockDriver.bdrv_check_ext_snapshot.Benoît Canet1-0/+5
This field is used by blkverify to disable external snapshots creation. It will also be used by block filters like quorum to disable external snapshot creation. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-10-02block: Remove unused assignment (fixes warning from clang)Stefan Weil1-1/+0
blockdev.c:1929:13: warning: Value stored to 'ret' is never read ret = 0; ^ ~ Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-09-20blockdev: do not default cache.no-flush to truePaolo Bonzini1-1/+1
That's why all my VMs were so fast lately. :) This changed in 1.6.0 by mistake in patch 29c4e2b (blockdev: Split up 'cache' option, 2013-07-18). Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-09-12block: Assert validity of BdrvActionOpsMax Reitz1-0/+2
In qmp_transaction, assert that the BdrvActionOps to be used is actually valid. This assertion failing is very improbable, however, it might happen, if a new TransactionActionKind is introduced "out of order" and the actions[] array is not updated. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12block: Error parameter for open functionsMax Reitz1-17/+13
Add an Error ** parameter to bdrv_open, bdrv_file_open and associated functions to allow more specific error messages. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12qmp: add interface blockdev-snapshot-delete-internal-syncWenchao Xia1-0/+61
This interface use id and name as optional parameters, to handle the case that one image contain multiple snapshots with same name which may be '', but with different id. Adding parameter id is for historical compatiability reason, and that case is not possible in qemu's new interface for internal snapshot at block device level, but still possible in qemu-img. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qmp: add interface blockdev-snapshot-internal-syncWenchao Xia1-0/+13
Snapshot ID can't be specified in this interface. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qmp: add internal snapshot support in qmp_transactionWenchao Xia1-0/+116
Unlike savevm, the qmp_transaction interface will not generate snapshot name automatically, saving trouble to return information of the new created snapshot. Although qcow2 support storing multiple snapshots with same name but different ID, here it will fail when an snapshot with that name already exist before the operation. Format such as rbd do not support ID at all, and in most case, it means trouble to user when he faces multiple snapshots with same name, so ban that case. Request with empty name will be rejected. Snapshot ID can't be specified in this interface. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-06block: use BDS ref for block jobsFam Zheng1-34/+15
Block jobs used drive_get_ref(drive_get_by_blockdev(bs)) to avoid BDS being deleted. Now we have BDS reference count, and block jobs don't care about dinfo, so replace them to get cleaner code. It is also the safe way when BDS has no drive info. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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