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2013-09-20configure: Undefine _FORTIFY_SOURCE prior using itMichal Privoznik
Currently, we are enforcing the _FORTIFY_SOURCE=2 without any previous detection if the macro has been already defined, e.g. by environment, or is just enabled by compiler by default. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Jan Vesely <jano.vesely@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-09-17Merge remote-tracking branch 'kiszka/queues/slirp' into stagingAnthony Liguori
# By Liu Ping Fan (3) and Jan Kiszka (1) # Via Jan Kiszka * kiszka/queues/slirp: slirp: clean up slirp_update_timeout slirp: set mainloop timeout with more precise value slirp: define timeout as macro slirp: make timeout local Message-id: cover.1379415024.git.jan.kiszka@siemens.com
2013-09-17Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori
# By Max Reitz (16) and others # Via Kevin Wolf * kwolf/for-anthony: (33 commits) qemu-iotests: Fix test 038 block: Assert validity of BdrvActionOps qemu-iotests: Cleanup test image in test number 007 qemu-img: fix invalid JSON coroutine: add ./configure --disable-coroutine-pool qemu-iotests: Adjustments due to error propagation qcow2: Use Error parameter qemu-img create: Emit filename on error block: Error parameter for create functions block: Error parameter for open functions bdrv: Use "Error" for creating images bdrv: Use "Error" for opening images qemu-iotests: add 057 internal snapshot for block device test case hmp: add interface hmp_snapshot_delete_blkdev_internal hmp: add interface hmp_snapshot_blkdev_internal qmp: add interface blockdev-snapshot-delete-internal-sync qmp: add interface blockdev-snapshot-internal-sync qmp: add internal snapshot support in qmp_transaction snapshot: distinguish id and name in snapshot delete snapshot: new function bdrv_snapshot_find_by_id_and_name() ... Message-id: 1379073063-14963-1-git-send-email-kwolf@redhat.com
2013-09-17Merge remote-tracking branch 'rth/tgt-i386' into stagingAnthony Liguori
# By Paolo Bonzini (1) and Peter Maydell (1) # Via Richard Henderson * rth/tgt-i386: target-i386: Only provide CMOV and friends if feature bit set target-i386: fix disassembly with PAE=1, PG=0 Message-id: 1379010496-5875-1-git-send-email-rth@twiddle.net
2013-09-17Merge remote-tracking branch 'bonzini/scsi-next' into stagingAnthony Liguori
# By Peter Lieven (3) and others # Via Paolo Bonzini * bonzini/scsi-next: spapr-vscsi: Report error on unsupported MAD requests spapr-vscsi: Adding VSCSI capabilities iscsi: split discard requests in multiple parts iscsi: add .bdrv_get_block_status iscsi: add logical block provisioning information to iscsilun hw/scsi/lsi53c895a: Use deposit32 rather than handcoded shift/mask hw/scsi/lsi53c895a: Use sextract32 for sign-extension scsi: Fix scsi_bus_legacy_add_drive() scsi-generic with serial virtio-scsi: Make type virtio-scsi-common abstract spapr-vscsi: add task management scsi: prefer UUID to VM name for the initiator name Message-id: 1378984634-765-1-git-send-email-pbonzini@redhat.com
2013-09-17Merge remote-tracking branch 'kraxel/chardev.7' into stagingAnthony Liguori
# By Gerd Hoffmann # Via Gerd Hoffmann * kraxel/chardev.7: chardev: fix pty_chr_timer Message-id: 1378972894-11185-1-git-send-email-kraxel@redhat.com
2013-09-17slirp: clean up slirp_update_timeoutJan Kiszka
No need to write out the timeout early, keep it local until we are done. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2013-09-17slirp: set mainloop timeout with more precise valueLiu Ping Fan
If slirp needs to emulate tcp timeout, then the timeout value for mainloop should be more precise, which is determined by slirp's fasttimo or slowtimo. Achieve this by swap the logic sequence of slirp_pollfds_fill and slirp_update_timeout. Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2013-09-17slirp: define timeout as macroLiu Ping Fan
Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2013-09-17slirp: make timeout localLiu Ping Fan
Each slirp has its own time to caculate timeout. Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2013-09-13qemu-iotests: Fix test 038Max Reitz
Test 038 uses asynchronous I/O, resulting (potentially) in a different output for every run (regarding the order of the I/O accesses). This can be fixed by simply sorting the I/O access messages, since their order is irrelevant anyway (for this asynchonous I/O). Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12target-i386: Only provide CMOV and friends if feature bit setPeter Maydell
The instructions CMOVcc, FCMOVcc and F[U]COMI[P] should only be present if the CMOV feature bit is set. Add missing feature bit checks so we correctly fault if emulating a 486 or 586. This fixes bug LP:1201446. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-12target-i386: fix disassembly with PAE=1, PG=0Paolo Bonzini
CR4.PAE=1 will not enable paging if CR0.PG=0, but the "if" chain in x86_cpu_get_phys_page_debug says otherwise. Check CR0.PG before everything else. Fixes "-d in_asm" for a code section at the beginning of OVMF. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
2013-09-12pc_sysfw: Fix ISA BIOS init for ridiculously big flashMarkus Armbruster
pc_isa_bios_init() suffers integer overflow for flash larger than INT_MAX. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-id: 1375276272-15988-9-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Don't abort when we can't allocate guest memoryMarkus Armbruster
We abort() on memory allocation failure. abort() is appropriate for programming errors. Maybe most memory allocation failures are programming errors, maybe not. But guest memory allocation failure isn't, and aborting when the user asks for more memory than we can provide is not nice. exit(1) instead, and do it in just one place, so the error message is consistent. Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-id: 1375276272-15988-8-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Clean up unnecessary S390 ifdefferyMarkus Armbruster
Another issue missed in commit fdec991 is -mem-path: it needs to be rejected only for old S390 KVM, not for any S390. Not that I personally care, but the ifdeffery in qemu_ram_alloc_from_ptr() annoys me. Note that this doesn't actually make -mem-path work, as the kernel doesn't (yet?) support large pages in the host for KVM guests. Clean it up anyway. Thanks to Christian Borntraeger for pointing out the S390 kernel limitations. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-id: 1375276272-15988-7-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Drop incorrect & dead S390 code in qemu_ram_remap()Markus Armbruster
Old S390 KVM wants guest RAM mapped in a peculiar way. Commit 6b02494 implemented that. When qemu_ram_remap() got added in commit cd19cfa, its code carefully mimicked the allocation code: peculiar way if defined(TARGET_S390X) && defined(CONFIG_KVM), else normal way. For new S390 KVM, we actually want the normal way. Commit fdec991 changed qemu_ram_alloc_from_ptr() accordingly, but forgot to update qemu_ram_remap(). If qemu_ram_alloc_from_ptr() maps RAM the normal way, but qemu_ram_remap() remaps it the peculiar way, remapping changes protection and flags, which it shouldn't. Fortunately, this can't happen, as we never remap on S390. Replace the incorrect code with an assertion. Thanks to Christian Borntraeger for help with assessing the bug's (non-)impact. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Message-id: 1375276272-15988-6-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Simplify the guest physical memory allocation hookMarkus Armbruster
Make it a generic hook rather than a KVM hook. Less code and ifdeffery. Since the only user of the hook is old S390 KVM, there's hope we can get rid of it some day. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Message-id: 1375276272-15988-5-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Reduce ifdeffery around -mem-pathMarkus Armbruster
Instead of spreading its ifdeffery everywhere, confine it to qemu_ram_alloc_from_ptr(). Everywhere else, simply test block->fd, which is non-negative exactly when block uses -mem-path. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Message-id: 1375276272-15988-4-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Clean up fall back when -mem-path allocation failsMarkus Armbruster
With -mem-path, qemu_ram_alloc_from_ptr() first tries to allocate accordingly, but when it fails, it falls back to normal allocation. The fall back allocation code used to be effectively identical to the "-mem-path not given" code, until it started to diverge in commit 432d268. I believe the code still works, but clean it up anyway: drop the special fall back allocation code, and fall back to the ordinary "-mem-path not given" code instead. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Message-id: 1375276272-15988-3-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12exec: Fix Xen RAM allocation with unusual optionsMarkus Armbruster
Issues: * We try to obey -mem-path even though it can't work with Xen. * To implement -machine mem-merge, we call memory_try_enable_merging(new_block->host, size). But with Xen, new_block->host remains null. Oops. Fix by separating Xen allocation from normal allocation. Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Message-id: 1375276272-15988-2-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-09-12block: Assert validity of BdrvActionOpsMax Reitz
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>
2013-09-12qemu-iotests: Cleanup test image in test number 007Bharata B Rao
qemu-iotests number 007 doesn't do test image cleanup. This will affect those protocols that expect a clean state before every test. Hence ensure that test image is cleaned up in this test. Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-img: fix invalid JSONPaolo Bonzini
Single quotes for JSON are a QMP-ism, use real JSON in qemu-img output. Reported-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12spapr-vscsi: Report error on unsupported MAD requestsAlexey Kardashevskiy
The existing driver just dropped unsupported requests. This adds error responses to those unhandled requests. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-09-12spapr-vscsi: Adding VSCSI capabilitiesNikunj A. Dadhania
This implements capabilities exchange between vscsi host and client. As at the moment no capability is supported, put zero flags everywhere and return. Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Nikunj A. Dadhania <nikunj@linux.vnet.ibm.com>
2013-09-12iscsi: split discard requests in multiple partsPeter Lieven
Replace .bdrv_aio_discard with .bdrv_co_discard so that discard requests can be split in multiple parts, each for a small amount of sectors. This is useful because we expose a generic API with no limit on the amount of sectors that can be unmapped in one request. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-09-12coroutine: add ./configure --disable-coroutine-poolStefan Hajnoczi
The 'gthread' coroutine backend was written before the freelist (aka pool) existed in qemu-coroutine.c. This means that every thread is expected to exit when its coroutine terminates. It is not possible to reuse threads from a pool. This patch automatically disables the pool when 'gthread' is used. This allows the 'gthread' backend to work again (for example, tests/test-coroutine completes successfully instead of hanging). I considered implementing thread reuse but I don't want quirks like CPU affinity differences due to coroutine threads being recycled. The 'gthread' backend is a reference backend and it's therefore okay to skip the pool optimization. Note this patch also makes it easy to toggle the pool for benchmarking purposes: ./configure --with-coroutine-backend=ucontext \ --disable-coroutine-pool Reported-by: Gabriel Kerneis <gabriel@kerneis.info> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Gabriel Kerneis <gabriel@kerneis.info> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-iotests: Adjustments due to error propagationMax Reitz
When opening/creating images, propagating errors instead of immediately emitting them on occurrence results in errors generally being printed on a single line rather than being split up into multiple ones. This in turn requires adjustments to some test results. Also, test 060 used a sed to filter out the test image directory and format by removing everything from the affected line after a certain keyword; this now also removes the error message itself, which can be fixed by using _filter_testdir and _filter_imgfmt. Finally, _make_test_img in common.rc did not filter out the test image directory etc. from stderr. This has been fixed through a redirection of stderr to stdout (which is already done in _check_test_img and _img_info). Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12qcow2: Use Error parameterMax Reitz
Employ usage of the new Error ** parameter in qcow2_open, qcow2_create and associated functions. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12qemu-img create: Emit filename on errorMax Reitz
bdrv_img_create generally does not emit the target filename, although this is pretty important information. Therefore, prepend its error message with the output filename (if an error occurs). Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12block: Error parameter for create functionsMax Reitz
Add an Error ** parameter to bdrv_create and its associated functions to allow more specific error messages. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12block: Error parameter for open functionsMax Reitz
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>
2013-09-12bdrv: Use "Error" for creating imagesMax Reitz
Add an Error ** parameter to BlockDriver.bdrv_create to allow more specific error messages. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12bdrv: Use "Error" for opening imagesMax Reitz
Add an Error ** parameter to BlockDriver.bdrv_open and BlockDriver.bdrv_file_open to allow more specific error messages. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-09-12qemu-iotests: add 057 internal snapshot for block device test caseWenchao Xia
Create in transaction and deletion in single command will be tested. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12hmp: add interface hmp_snapshot_delete_blkdev_internalWenchao Xia
It is hard to make both id and name optional in hmp console as qmp interface, so this interface require user to specify name. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12hmp: add interface hmp_snapshot_blkdev_internalWenchao Xia
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-delete-internal-syncWenchao Xia
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 Xia
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 Xia
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>
2013-09-12snapshot: distinguish id and name in snapshot deleteWenchao Xia
Snapshot creation actually already distinguish id and name since it take a structured parameter *sn, but delete can't. Later an accurate delete is needed in qmp_transaction abort and blockdev-snapshot-delete-sync, so change its prototype. Also *errp is added to tip error, but return value is kepted to let caller check what kind of error happens. Existing caller for it are savevm, delvm and qemu-img, they are not impacted by introducing a new function bdrv_snapshot_delete_by_id_or_name(), which check the return value and do the operation again. Before this patch: For qcow2, it search id first then name to find the one to delete. For rbd, it search name. For sheepdog, it does nothing. After this patch: For qcow2, logic is the same by call it twice in caller. For rbd, it always fails in delete with id, but still search for name in second try, no change to user. Some code for *errp is based on Pavel's patch. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Pavel Hrdina <phrdina@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12snapshot: new function bdrv_snapshot_find_by_id_and_name()Wenchao Xia
To make it clear about id and name in searching, add this API to distinguish them. Caller can choose to search by id or name, *errp will be set only for exception. Some code are modified based on Pavel's patch. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Pavel Hrdina <phrdina@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-iotests: New test case in 061Max Reitz
Add one test case for zero cluster expansion on qcow2 version downgrade in shared L2 tables (i.e., L2 tables with a refcount > 1) and one for zero expansion on backed clusters in shared L2 tables. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-iotests: add tests for runtime fd passing via SCM rightsWenchao Xia
This case will test whether the monitor can receive fd at runtime. To verify better, additional monitor is created to see if qemu can handler two monitor instances correctly. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-iotests: add infrastructure of fd passing via SCMWenchao Xia
This patch make use of the compiled scm helper program to transfer fd via unix socket at runtime. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-iotests: add unix socket help programWenchao Xia
This program can do a sendmsg call to transfer fd with unix socket, which is not supported in python2. The built binary will not be deleted in clean, but it is a existing issue in ./tests, which should be solved in another patch. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qemu-iotest: qcow2 image option amendmentMax Reitz
Add tests for qemu-img amend on qcow2 image files. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qcow2: Implement bdrv_amend_optionsMax Reitz
Implement bdrv_amend_options for compat, size, backing_file, backing_fmt and lazy_refcounts. Downgrading images from compat=1.1 to compat=0.10 is achieved through handling all incompatible flags accordingly, clearing all compatible and autoclear flags and expanding all zero clusters. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12qcow2: Save refcount order in BDRVQcowStateMax Reitz
Save the image refcount order in BDRVQcowState. This will be relevant for future code supporting different refcount orders than four and also for code that needs to verify a certain refcount order for an opened image. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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