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2013-08-12hw/virtio/virtio-mmio: Make QueueNumMax read 0 for unavailable queuespull-arm-devs-20130812arm-devs.nextarm-devs.for-upstreamPeter Maydell
The virtio-mmio spec says that QueueNumMax must read zero for queues which are unavailable; implement this, rather than always returning VIRTQUEUE_MAX_SIZE. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1374853288-9912-3-git-send-email-peter.maydell@linaro.org Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
2013-08-09hw/virtio/virtio: Don't allow guests to add/remove queuesPeter Maydell
A queue size of 0 is used to indicate a nonexistent queue, so don't allow the guest to flip a queue between zero-size and non-zero-size. Don't permit setting of negative queue sizes either. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1374853288-9912-2-git-send-email-peter.maydell@linaro.org Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
2013-08-08mips: revert commit b332d24a8e1290954029814d09156b06ede358e2Aurelien Jarno
Now that this code path is not triggered anymore during the tests, revert commit b332d24a8e1290954029814d09156b06ede358e2. Booting a MIPS target without kernel nor bios doesn't really make sense. At the same time replace fprintf(stderr, ...) by error_report(). Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-08-08tcg/mips: fix invalid op definition errorsJames Hogan
tcg/mips/tcg-target.h defines various operations conditionally depending upon the isa revision, however these operations are included in mips_op_defs[] unconditionally resulting in the following runtime errors if CONFIG_DEBUG_TCG is defined: Invalid op definition for movcond_i32 Invalid op definition for rotl_i32 Invalid op definition for rotr_i32 Invalid op definition for deposit_i32 Invalid op definition for bswap16_i32 Invalid op definition for bswap32_i32 tcg/tcg.c:1196: tcg fatal error Fix with ifdefs like the i386 backend does for movcond_i32. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-08-07fw_cfg: the I/O port variant expects little-endianPaolo Bonzini
The I/O port variant of fw_cfg is used by sparc64, which is a big-endian machine. Firmware swaps bytes before sending them to fw_cfg, so we need to unswap them in the device. This is only used on sparc64 and on (little-endian) x86, so it does not affect any other target. 32-bit Sparc and PPC all use memory-mapped fw_cfg. Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Message-id: 1375014954-31916-2-git-send-email-pbonzini@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07po: Update all *.po filesStefan Weil
Running "make install" modified the *.po files because they were no longer up to date. Synchronize them with latest ui/gtk.c and modified build rules which use paths relative to the project root. Signed-off-by: Stefan Weil <sw@weilnetz.de> Message-id: 1375731922-24259-1-git-send-email-sw@weilnetz.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07target-ppc: Add POWER5+ v2.1 CPU modelAndreas Färber
Let's avoid -cpu host barfing at this PVR. Linux recognizes it as "POWER5+ (gs) v2.1". Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1375321323-29954-5-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07target-ppc: Prepare POWER5P CPU familyAndreas Färber
It is ISA 2.03. Modelled as 970FX minus AltiVec flag. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1375321323-29954-4-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07target-ppc: Turn POWER5gr CPU into alias for POWER5Andreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1375321323-29954-3-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07target-ppc: Turn POWER5gs CPU into alias for POWER5+Andreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1375321323-29954-2-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07target-ppc: Fix POWER7+ modelAndreas Färber
Commit 03a15a5436ed7723f406f15cc3798aa9991e75b5 claimed to add a POWER7+ model but instead added a "POWER7P" model, with an unhelpful "POWER7P" description on top. Fix this to "POWER7+" as we already have "POWER3+", "POWER4+" and "POWER5+" and there being no reason to deviate with the user-visible command line -cpu POWER7P from the marketing name POWER7+. Further, don't needlessly deviate from the scheme of naming PVR constant, QOM type and device description after the exact revision that is in fact encoded in the PVR used. That way, we can change the user-friendly alias -cpu POWER7+ to point to a different revision if we so desire, while not polluting the type namespace. This naming scheme is sensible and completely orthogonal to how PVRs may or may not get matched to CPU types. Cc: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1375736387-8429-1-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07Bugfix for loading multiboot kernelsMartijn van den Broek
This patch fixes a bug in rom_copy introduced by commit d60fa42e8bae39440f997ebfe8fe328269a57d16. rom_copy failed to load roms with a "datasize" of 0. As a result, multiboot kernels were not loaded correctly when they contain a segment with a "file size" of 0. https://bugs.launchpad.net/qemu/+bug/1208944 Signed-off-by: Martijn van den Broek <martijn.vdbrk@gmail.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: CAG1x_oET1u3TMPu3r_zzd3ZXsTWQLiaM0zAc+RkHFCwvJjGOvg@mail.gmail.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-07Merge remote-tracking branch 'afaerber/tags/qom-cpu-for-anthony' into stagingAnthony Liguori
QOM CPUState refactorings * Clean up X86CPU error handling # gpg: Signature made Tue 06 Aug 2013 01:57:34 PM CDT using RSA key ID 3E7E013F # gpg: Can't check signature: public key not found # By Andreas Färber # Via Andreas Färber * afaerber/tags/qom-cpu-for-anthony: target-i386: Fix X86CPU error handling
2013-08-07Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori
# By Fam Zheng (8) and others # Via Kevin Wolf * kwolf/for-anthony: vmdk: rename num_gtes_per_gte to num_gtes_per_gt vmdk: use heap allocation for whole_grain vmdk: check l1 size before opening image vmdk: check l2 table size when opening vmdk: check granularity field in opening qemu-iotests: add empty test case for vmdk qemu-iotests: add poke_file utility function vmdk: use unsigned values for on disk header fields vmdk: Make VMDK3Header and VmdkGrainMarker QEMU_PACKED sheepdog: add missing .bdrv_has_zero_init qemu-iotests: filter QEMU version in monitor banner iov: handle EOF in iov_send_recv ignore SIGPIPE in qemu-img and qemu-io qemu-img: Error out for excess arguments Message-id: 1375799990-995-1-git-send-email-kwolf@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-06target-i386: Fix X86CPU error handlingAndreas Färber
Error **errp argument is not for emitting warnings, it means an error has occurred and the caller should not make any assumptions about the state of other return values (unless otherwise documented). Therefore cpu_x86_create() must unref the new X86CPU itself, and pc_new_cpu() must check for an Error rather than NULL return value. While at it, clean up a superfluous NULL check. Reported-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: qemu-stable@nongnu.org Cc: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-08-06vmdk: rename num_gtes_per_gte to num_gtes_per_gtFam Zheng
num_gtes_per_gte is a historical typo, rename it to a more sensible name. It means "number of GrainTableEntries per GrainTable". Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06vmdk: use heap allocation for whole_grainFam Zheng
We should never grow the stack beyond 1 MB, otherwise we'll fall off the end. Thread stacks and coroutine stacks (1 MB) do not grow. get_cluster_offset() allocates a big stack offset, it will fail for big cluster images, change to heap allocated buffer. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06vmdk: check l1 size before opening imageFam Zheng
L1 table size is calculated from capacity, granularity and l2 table size. If capacity is too big or later two are too small, the L1 table will be too big to allocate in memory. Limit it to a reasonable range. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06vmdk: check l2 table size when openingFam Zheng
header.num_gtes_per_gte determines size for L2 table. Check for too big value before using it. Limit to 512M entries (2GB per one L2 table). Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06vmdk: check granularity field in openingFam Zheng
Granularity is used to calculate the cluster size and allocate r/w buffer. Check the value from image before using it, so we don't abort() for unbounded memory allocation. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06qemu-iotests: add empty test case for vmdkFam Zheng
Will add vmdk specific tests later here. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06qemu-iotests: add poke_file utility functionStefan Hajnoczi
The new poke_file function sets bytes at an offset in a file given a printf-style format string. It can be used to corrupt an image file for test coverage of error paths. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06vmdk: use unsigned values for on disk header fieldsFam Zheng
The size and offset fields are all non-negative values, use uint64_t for them to avoid getting negative in memory value by int overflow. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06vmdk: Make VMDK3Header and VmdkGrainMarker QEMU_PACKEDFam Zheng
It's best to make it consistent that all on disk structures are QEMU_PACKED. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06target-mips: fix decoding of microMIPS POOL32Axf instructionsLeon Alrae
Fix incorrect assumption that DSP and non-DSP versions of the following instructions have the same encoding: MULT, MULTU, MADD, MADDU, MSUB, MSUBU, MFHI, MFLO, MTHI, MTLO. Correct the existing (non-DSP) instructions and add DSP equivalents. Reference: MIPS Architecture for Programmers Volume II-B: The microMIPS32 Instruction Set MIPS Architecture for Programmers Volume IV-e: The MIPS DSP Module for the microMIPS32 Architecture Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-08-06sheepdog: add missing .bdrv_has_zero_initLiu Yuan
Commit 3ac21627 changed the behaviour of bdrv_has_zero_init() to default to 0. In the review for Sheepdog it turned out that enabling it is safe, so that commit updated one BlockDriver definition of sheepdog to use bdrv_has_zero_init_1, missed however that there are more BlockDrivers in the driver. Fix these now. Cc: Kevin Wolf <kwolf@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Liu Yuan <namei.unix@gmail.com> Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06qemu-iotests: filter QEMU version in monitor bannerStefan Hajnoczi
Filter out the QEMU monitor version banner so that tests do not break when the QEMU version number is changed. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06iov: handle EOF in iov_send_recvMORITA Kazutaka
Without this patch, iov_send_recv() never returns when do_send_recv() returns zero. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06ignore SIGPIPE in qemu-img and qemu-ioMORITA Kazutaka
This prevents the tools from being stopped when they write data to a closed connection in the other side. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-06qemu-img: Error out for excess argumentsKevin Wolf
Don't silently ignore excess arguments at the end of the command line, but error out instead. This can catch typos like 'resize test.img + 1G', which doesn't increase the image size by 1G as intended, but truncates the image to 1G. Even for less dangerous commands, the old behaviour is confusing. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-08-05semaphore: fix a hangup problem under load on NetBSD hosts.Izumi Tsutsui
Fix following bugs in "fallback implementation of counting semaphores with mutex+condvar" added in c166cb72f1676855816340666c3b618beef4b976: - waiting threads are not restarted properly if more than one threads are waiting unblock signals in qemu_sem_timedwait() - possible missing pthread_cond_signal(3) calls when waiting threads are returned by ETIMEDOUT - fix an uninitialized variable The problem is analyzed by and fix is provided by Noriyuki Soda. Also put additional cleanup suggested by Laszlo Ersek: - make QemuSemaphore.count unsigned (it won't be negative) - check a return value of in pthread_cond_wait() in qemu_sem_wait() Signed-off-by: Izumi Tsutsui <tsutsui@ceres.dti.ne.jp> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Message-id: 1372841894-10634-1-git-send-email-tsutsui@ceres.dti.ne.jp Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: memory leak RDMAContext::hostIsaku Yamahata
It is allocated by g_strdup(), so needs to be freed. Reviewed-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Isaku Yamahata <yamahata@private.email.ne.jp> Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-8-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: use RDMA_WRID_READYIsaku Yamahata
Reviewed-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Isaku Yamahata <yamahata@private.email.ne.jp> Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-7-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: qemu_rdma_post_send_control uses wrongly RDMA_WRID_MAXIsaku Yamahata
RDMA_WRID_CONTROL should be used. And remove related work around. Reviewed-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Isaku Yamahata <yamahata@private.email.ne.jp> Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-6-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: don't use negative index to arrayIsaku Yamahata
Reviewed-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Isaku Yamahata <yamahata@private.email.ne.jp> Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-5-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: correct newlines in error statementsMichael R. Hines
Don't print newlines on the error_setg() function, but still allow newlines on fprintf(). Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-4-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: forgot to turn off the debugging flagMichael R. Hines
Ooops. We forgot to turn off the flag. Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-3-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05rdma: bugfix: make IPv6 support workMichael R. Hines
RDMA does not use sockets, so we cannot use many of the socket helper functions, but we *do* use inet_parse() which gives RDMA all the necessary details of the connection parameters. However, when testing with libvirt, a simple IPv6 migration test failed because we were not using getaddrinfo() properly. This makes IPv6 migration over RDMA work. Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Message-id: 1375584894-9917-2-git-send-email-mrhines@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05pxa2xx: Avoid object_get_link_property() assertion for "parent_bus"Andreas Färber
pxa2xx_i2c_init() creates a pxa2xx-i2c-slave device on a second i2c-bus, which has a NULL parent device. This causes an assertion in object_get_canonical_path() when accessing pxa2xx-i2c-slave's "parent_bus" link<bus> property in tosa and likely other PXA2xx machines. Fix this by using the pxa2xx_i2c device, created just before, as parent. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Message-id: 1375621501-5564-1-git-send-email-afaerber@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05target-ppc: Add POWER7+ CPU modelAlexey Kardashevskiy
This patch adds CPU PVR definition for POWER7+. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1375412374-24701-1-git-send-email-aik@ozlabs.ru Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05Merge remote-tracking branch 'filippov/tags/20130729-xtensa' into stagingAnthony Liguori
xtensa queue 2013-07-29 * filippov/tags/20130729-xtensa: target-xtensa: check register window inline target-xtensa: don't generate dead code to access invalid SRs tests/tcg/xtensa: Fix out-of-tree build target-xtensa: avoid double-stopping at breakpoints target-xtensa: add fallthrough markers target-xtensa: add extui unit test Conflicts: configure Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05Merge remote-tracking branch 'mcayland/qemu-openbios' into stagingAnthony Liguori
* mcayland/qemu-openbios: Update OpenBIOS images Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05Merge remote-tracking branch 'stefanha/net' into stagingAnthony Liguori
# By Jan Kiszka # Via Stefan Hajnoczi * stefanha/net: pcnet: Flush queued packets on end of STOP state Message-id: 1375704975-19128-1-git-send-email-stefanha@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05Merge remote-tracking branch 'stefanha/block' into stagingAnthony Liguori
# By Kevin Wolf # Via Stefan Hajnoczi * stefanha/block: block: Disable driver-specific options for 1.6 Message-id: 1375461379-20277-1-git-send-email-stefanha@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05Merge remote-tracking branch 'mjt/trivial-patches' into stagingAnthony Liguori
# By Fam Zheng (1) and others # Via Michael Tokarev * mjt/trivial-patches: vmdk: fix comment for vmdk_co_write_zeroes memory.c: drop kvm.h dependency block/iscsi.c: Fix printf format error. qemu-ga: build it even if !system Message-id: 1375453248-7178-1-git-send-email-mjt@msgid.tls.msk.ru Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05Merge remote-tracking branch 'kraxel/usb.86' into stagingAnthony Liguori
# By Gerd Hoffmann # Via Gerd Hoffmann * kraxel/usb.86: usb-redir: fix use-after-free xhci: fix segfault Message-id: 1375362669-14815-1-git-send-email-kraxel@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-08-05pcnet: Flush queued packets on end of STOP stateJan Kiszka
Analogously to other NICs, we have to inform the network layer when the can_receive handler will no longer report 0. Without this, we may get stuck waiting on queued incoming packets. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-08-03target-mips: fix 34Kf configuration for DSP ASEYongbok Kim
34Kf core does support DSP ASE. CP0_Config3 configuration for 34Kf and description are wrong. Please refer to MIPS32(R) 34Kf(TM) Processor Core Datasheet Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-08-02block: Disable driver-specific options for 1.6Kevin Wolf
We don't want to commit to the API yet before everything is worked out. Like already for 1.5, disable it again for the 1.6 release. This commit is meant to be reverted after the 1.6 release. The disabling of the driver-specific options is achieved by applying the old checks while parsing the command line. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-08-02vmdk: fix comment for vmdk_co_write_zeroesFam Zheng
The comment was truncated. Add the missing parts, especially explain why we need zero_dry_run. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>