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2012-10-24qemu-img: Add --backing-chain option to info commandStefan Hajnoczi1-14/+153
The qemu-img info --backing-chain option enumerates the backing file chain. For example, for base.qcow2 <- snap1.qcow2 <- snap2.qcow2 the output becomes: $ qemu-img info --backing-chain snap2.qcow2 image: snap2.qcow2 file format: qcow2 virtual size: 100M (104857600 bytes) disk size: 196K cluster_size: 65536 backing file: snap1.qcow2 backing file format: qcow2 image: snap1.qcow2 file format: qcow2 virtual size: 100M (104857600 bytes) disk size: 196K cluster_size: 65536 backing file: base.qcow2 backing file format: qcow2 image: base.qcow2 file format: qcow2 virtual size: 100M (104857600 bytes) disk size: 136K cluster_size: 65536 Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24qemu-img rebase: use empty string to rebase without backing fileAlex Bligh1-10/+19
This patch allows an empty filename to be passed as the new base image name for qemu-img rebase to mean base the image on no backing file (i.e. independent of any backing file). According to Eric Blake, qemu-img rebase already supports this when '-u' is used; this adds support when -u is not used. Signed-off-by: Alex Bligh <alex@alex.org.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24qemu-img: Fix division by zero for zero size imagesKevin Wolf1-8/+15
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-17Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori1-54/+203
* kwolf/for-anthony: block: Don't forget to delete temporary file Don't require encryption password for 'qemu-img info' command qemu-img: Add json output option to the info command. qapi: Add SnapshotInfo and ImageInfo. ahci: properly reset PxCMD on HBA reset block: fix block tray status vdi: Fix warning from clang block/curl: Fix wrong free statement ide: Fix error messages from static code analysis (no real error) ATAPI: STARTSTOPUNIT only eject/load media if powercondition is 0 sheepdog: fix savevm and loadvm
2012-09-14Spelling fixes in comments and documentationStefan Weil1-1/+1
These wrong spellings were detected by codespell: * successully -> successfully * alot -> a lot * wanna -> want to * infomation -> information * occured -> occurred ["also is" -> "is also" and "ressources" -> "resources" suggested by Peter Maydell <peter.maydell@linaro.org>] Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-09-12Don't require encryption password for 'qemu-img info' commandDaniel P. Berrange1-10/+11
The encryption password is only required if I/O is going to be performed on a disk image. The 'qemu-img info' command merely reports metadata, so it should not ask for a decryption password Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-12qemu-img: Add json output option to the info command.Benoît Canet1-44/+192
This option --output=[human|json] make qemu-img info output on human or JSON representation at the choice of the user. example: { "snapshots": [ { "vm-clock-nsec": 637102488, "name": "vm-20120821145509", "date-sec": 1345553709, "date-nsec": 220289000, "vm-clock-sec": 20, "id": "1", "vm-state-size": 96522745 }, { "vm-clock-nsec": 28210866, "name": "vm-20120821154059", "date-sec": 1345556459, "date-nsec": 171392000, "vm-clock-sec": 46, "id": "2", "vm-state-size": 101208714 } ], "virtual-size": 1073741824, "filename": "snap.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 985587712, "dirty-flag": false } Signed-off-by: Benoit Canet <benoit@irqsave.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-08-10block: add BLOCK_O_CHECK for qemu-img checkStefan Hajnoczi1-1/+1
Image formats with a dirty bit, like qed and qcow2, repair dirty image files upon open with BDRV_O_RDWR. Performing automatic repair when qemu-img check runs is not ideal because the bdrv_open() call repairs the image before the actual bdrv_check() call from qemu-img.c. Fix this "double repair" since it leads to confusing output from qemu-img check. Tell the block driver that this image is being opened just for bdrv_check(). This skips automatic repair and qemu-img.c can invoke it manually with bdrv_check(). Update the golden output for qemu-iotests 039 to reflect the new qemu-img check output. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-08-06qemu-img: use QemuOpts instead of QEMUOptionParameter in resize functionDong Xu Wang1-11/+17
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-08-02Support 'help' as a synonym for '?' in command line optionsPeter Maydell1-2/+2
For command line options which permit '?' meaning 'please list the permitted values', add support for 'help' as a synonym, by abstracting the check out into a helper function. This change means that in some cases where we were being lazy in our string parsing, "?junk" will now be rejected as an invalid option rather than being (undocumentedly) treated the same way as "?". Update the documentation to use 'help' rather than '?', since '?' is a shell metacharacter and thus prone to fail confusingly if there is a single character filename in the current working directory and the '?' has not been escaped. It's therefore better to steer users towards 'help', though '?' is retained for backwards compatibility. We do not, however, update the output of the system emulator's -help (or any documentation autogenerated from the qemu-options.hx which is the source of the -help text) because libvirt parses our -help output and will break. At a later date when QEMU provides a better interface so libvirt can avoid having to do this, we can update the -help text too. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-06-15block: Replace bdrv_get_format() by bdrv_get_format_name()Markus Armbruster1-3/+2
So callers don't need to know anything about maximum name length. Returning a pointer is safe, because the name string lives as long as the block driver it names, and block drivers don't die. Requested by Peter Maydell. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-06-15qemu-img check: Print fixed clusters and recheckKevin Wolf1-0/+10
When any inconsistencies have been fixed, print the statistics and run another check to make sure everything is correct now. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-06-15qemu-img check -r for repairing imagesKevin Wolf1-3/+22
The QED block driver already provides the functionality to not only detect inconsistencies in images, but also fix them. However, this functionality cannot be manually invoked with qemu-img, but the check happens only automatically during bdrv_open(). This adds a -r switch to qemu-img check that allows manual invocation of an image repair. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-05-14qemu-img: Fix segmentation faultCharles Arnold1-1/+3
The following command generates a segmentation fault. qemu-img convert -O vpc -o ? test test2 This is because the 'goto out;' statement calls qemu_progress_end before qemu_progress_init is called resulting in a NULL pointer invocation. Signed-off-by: Charles Arnold <carnold@suse.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-05-10qemu-img: make "info" backing file output correct and easier to usePaolo Bonzini1-5/+7
qemu-img info should use the same logic as qemu when printing the backing file path, or debugging becomes quite tricky. We can also simplify the output in case the backing file has an absolute path or a protocol. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-20qemu-img: let 'qemu-img convert' flush dataLiu Yuan1-2/+2
The 'qemu-img convert -h' advertise that the default cache mode is 'writeback', while in fact it is 'unsafe'. This patch 1) fix the help manual and 2) let bdrv_close() call bdrv_flush() 2) is needed because some backend storage doesn't have a self-flush mechanism(for e.g., sheepdog), so we need to call bdrv_flush() to make sure the image is really writen to the storage instead of hanging around writeback cache forever. Signed-off-by: Liu Yuan <tailai.ly@taobao.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-05qemu-img: add dirty flag statusDong Xu Wang1-0/+3
Some block drivers can verify their image files are clean or not. So we can show it while using "qemu-img info". Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-05qemu-img: add image fragmentation statisticsDong Xu Wang1-1/+8
Discussion can be found at: http://patchwork.ozlabs.org/patch/128730/ This patch add image fragmentation statistics while using qemu-img check. Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-03-12qcow2: Add error messages in qcow2_truncateKevin Wolf1-1/+1
qemu-img resize has some limitations with qcow2, but the user is only told that "this image format does not support resize". Quite confusing, so add some more detailed error_report() calls and change "this image format" into "this image". Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-02-29qemu-img: fix segment fault when the image format is qedZhi Yong Wu1-0/+2
[root@f15 qemu]# qemu-img info /home/zwu/work/misc/rh6.img image: /home/zwu/work/misc/rh6.img file format: qed virtual size: 4.0G (4294967296 bytes) disk size: 1.2G cluster_size: 65536 Segmentation fault (core dumped) Today when i were fixing another issue, i found this issue; After simple investigation, i found that the required clock vm_clock is not created for qemu tool. Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-02-09cutils: extract buffer_is_zero() from qemu-img.cStefan Hajnoczi1-39/+7
The qemu-img.c:is_not_zero() function checks if a buffer contains all zeroes. This function will come in handy for zero-detection in the block layer, so clean it up and move it to cutils.c. Note that the function now returns true if the buffer is all zeroes. This avoids the double-negatives (i.e. !is_not_zero()) that the old function can cause in callers. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-12-15qemu-img rebase: Fix for undersized backing filesKevin Wolf1-9/+33
Backing files may be smaller than the corresponding COW file. When reading directly from the backing file, qemu-img rebase must consider this and assume zero sectors after the end of backing files. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-11-28qemu-img: Tighten parsing of size argumentsMarkus Armbruster1-4/+6
strtosz_suffix() fails unless the size is followed by 0, whitespace or ','. Useless here, because we need to fail for any junk following the size, even if it starts with whitespace or ','. Check manually. Things like "qemu-img create xxx 1024," and "qemu-img convert -S '1024 junk'" are now caught. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-21qemu-img: Don't allow preallocation and compression at the same timeKevin Wolf1-0/+11
Only qcow and qcow2 can do compression at all, and they require unallocated clusters when writing the compressed data. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-08-29qemu-img: Require larger zero areas for sparse handlingKevin Wolf1-2/+59
By default, require 4k of consecutive zero bytes for qemu-img to make the output file sparse by not issuing a write request for the zeroed parts. Add an -S option to allow users to tune this setting. This helps to avoid situations where a lot of zero sectors and data sectors are mixed and qemu-img tended to issue many tiny 512 byte writes. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-23qemu-img: print error codes when convert failsStefan Hajnoczi1-5/+8
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-23qemu-img: Use qemu_blockalignKevin Wolf1-6/+6
Now that you can use cache=none for the output file in qemu-img, we should properly align our buffers so that raw-posix doesn't have to use its (smaller) bounce buffer. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-08-23block: add cache=directsync parameter to -driveStefan Hajnoczi1-1/+2
This patch adds -drive cache=directsync for O_DIRECT | O_SYNC host file I/O with no disk write cache presented to the guest. This mode is useful when guests may not be sending flushes when appropriate and therefore leave data at risk in case of power failure. When cache=directsync is used, write operations are only completed to the guest when data is safely on disk. This new mode is like cache=writethrough but it bypasses the host page cache. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-23block: parse cache mode flags in a single placeStefan Hajnoczi1-24/+3
This patch introduces bdrv_parse_cache_flags() which sets open flags given a cache mode. Previously this was duplicated in blockdev.c and qemu-img.c. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori1-9/+9
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-19block: add bdrv_get_allocated_file_size() operationFam Zheng1-30/+1
qemu-img.c wants to count allocated file size of image. Previously it counts a single bs->file by 'stat' or Window API. As VMDK introduces multiple file support, the operation becomes format specific with platform specific meanwhile. The functions are moved to block/raw-{posix,win32}.c and qemu-img.c calls bdrv_get_allocated_file_size to count the bs. And also added VMDK code to count his own extents. Signed-off-by: Fam Zheng <famcool@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-07-05qemu-img: Add cache command line optionFederico Simoncelli1-13/+67
qemu-img currently writes disk images using writeback and filling up the cache buffers which are then flushed by the kernel preventing other processes from accessing the storage. This is particularly bad in cluster environments where time-based algorithms might be in place and accessing the storage within certain timeouts is critical. This patch adds the option to choose a cache method when writing disk images. Signed-off-by: Federico Simoncelli <fsimonce@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-24qemu-img: Don't prepend qemu-img to error messages twice.Markus Armbruster1-4/+4
error_report() prepends the location already. Example: $ qemu-img convert -6 qemu-img: qemu-img: option -6 is deprecated, please use '-o compat6' instead! Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-06-24Strip trailing '\n' from error_report()'s first argumentMarkus Armbruster1-2/+2
error_report() prepends location, and appends a newline. The message constructed from the arguments should not contain a newline. Fix the obvious offenders. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-05-18qemu_img: is_not_zero() optimizationDmitry Konishchev1-3/+26
I run qemu-img under profiler and realized, that most of CPU time is consumed by is_not_zero() function. I had made a couple of optimizations on it and got the following output for `time qemu-img convert -O qcow2 volume.qcow2 snapshot.qcow2`: Original qemu-img: real 0m56.159s user 0m34.670s sys 0m12.079s Patched qemu-img: real 0m34.805s user 0m18.445s sys 0m12.552s Signed-off-by: Dmitry Konishchev <konishchev@gmail.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-05-18qemu-img.c: Remove superfluous parenthesisJes Sorensen1-3/+3
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-05-03qemu-img resize: Fix option parsingKevin Wolf1-2/+11
For shrinking images, you're supposed to use a negative size. However, the leading minus makes getopt think that it's an option and so you get the help text if you don't use -- like in 'qemu-img resize test.img -- -1G'. This patch handles the size first and removes it from the argument list so that getopt won't even try to interpret it and you don't need -- any more. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-27qemu-img: allow rebase to a NULL backing file when unsafeAnthony Liguori1-1/+1
QEMU can drop a backing file so that an image file no longer depends on the backing file, but this feature has not been exposed in qemu-img. This is useful in an image streaming usecase or when an image file has been fully allocated and no reads can hit the backing file anymore. Since the dropping the backing file can make the image unusable, only allow this when the unsafe flag has been set. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-07qemu-img rebase: Fix segfault if backing file can't be openedKevin Wolf1-2/+6
bdrv_delete must not be called for a NULL BlockDriverState. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-04-07qemu-img: Initial progress printing supportJes Sorensen1-2/+36
This adds the basic infrastructure for supporting progress output on the command line, as well as progress support for qemu-img commands 'rebase' and 'convert'. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-02-10qemu-img: Improve error messages for failed bdrv_openKevin Wolf1-3/+7
Output the error message string of the bdrv_open return code. Also set a non-empty device name for the images because the unknown feature error message includes it. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-01-24Make strtosz() return int64_t instead of ssize_tJes Sorensen1-1/+1
strtosz() needs to return a 64 bit type even on 32 bit architectures. Otherwise qemu-img will fail to create disk images >= 2GB Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-01-24qemu-img snapshot: Use writeback cachingKevin Wolf1-1/+1
None of the other qemu-img subcommands uses writethrough, and there's no reason why snapshot should be special. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2010-12-17Remove NULL checks for bdrv_new return valueKevin Wolf1-4/+1
It's an indirect call to qemu_malloc, which never returns an error. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17qemu.img.c: Use error_report() instead of own error() implementationJes Sorensen1-65/+62
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17qemu-img.c: Re-factor img_create()Jes Sorensen1-106/+2
This patch re-factors img_create() moving the code doing the actual work into block.c where it can be shared with QEMU. This is needed to be able to create images from QEMU to be used for live snapshots. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17qemu-img: Call error_set_prognameKevin Wolf1-0/+3
Call error_set_progname during the qemu-img initialization, so that error messages printed with error_report() use the right prefix. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17qemu-img.c: Clean up handling of image size in img_create()Jes Sorensen1-6/+17
This cleans up the handling of image size in img_create() by parsing the value early, and then only setting it once if a value has been added as the last argument to the command line. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-14qemu-img: Fail creation if backing format is invalidStefan Hajnoczi1-10/+12
The qemu-img create command should check the backing format to ensure only image files with valid backing formats are created. By checking in qemu-img.c we can print a useful error message. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-14qemu-img: Free option parameter lists in img_create()Stefan Hajnoczi1-2/+2
Free option parameter lists in the img_create() error return path. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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