summaryrefslogtreecommitdiffstats
path: root/qemu-img-cmds.hx
Commit message (Collapse)AuthorAgeFilesLines
* qemu-img: introduce --target-image-opts for 'convert' commandDaniel P. Berrange2017-05-291-2/+2
| | | | | | | | | | | | | | | | The '--image-opts' flag indicates whether the source filename includes options. The target filename has to remain in the plain filename format though, since it needs to be passed to bdrv_create(). When using --skip-create though, it would be possible to use image-opts syntax. This adds --target-image-opts to indicate that the target filename includes options. Currently this mandates use of the --skip-create flag too. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170515164712.6643-4-berrange@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
* qemu-img: Fix documentation of convertFam Zheng2017-05-291-2/+2
| | | | | | | | | | It got lost in commit a8d16f9ca "qemu-img: Update documentation for -U". Reported-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Message-id: 20170515103551.31313-1-famz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
* qemu-img: Update documentation for -UFam Zheng2017-05-111-18/+18
| | | | | Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Document backing optionsMax Reitz2017-04-271-4/+4
| | | | | | | | | | | | The create and convert subcommands have shorthands to set the backing_file and, in the case of create, the backing_fmt options for the new image. However, they have not been documented so far, which is remedied by this patch. Reported-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: img_create does not support image-opts, fix docsJeff Cody2017-04-071-2/+2
| | | | | | | | | | 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>
* qemu-img: make convert asyncPeter Lieven2017-02-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the convert process is currently completely implemented with sync operations. That means it reads one buffer and then writes it. No parallelism and each sync request takes as long as it takes until it is completed. This can be a big performance hit when the convert process reads and writes to devices which do not benefit from kernel readahead or pagecache. In our environment we heavily have the following two use cases when using qemu-img convert. a) reading from NFS and writing to iSCSI for deploying templates b) reading from iSCSI and writing to NFS for backups In both processes we use libiscsi and libnfs so we have no kernel cache. This patch changes the convert process to work with parallel running coroutines which can significantly improve performance for network storage devices: qemu-img (master) nfs -> iscsi 22.8 secs nfs -> ram 11.7 secs ram -> iscsi 12.3 secs qemu-img-async (8 coroutines, in-order write disabled) nfs -> iscsi 11.0 secs nfs -> ram 10.4 secs ram -> iscsi 9.0 secs This patches introduces 2 new cmdline parameters. The -m parameter to specify the number of coroutines running in parallel (defaults to 8). And the -W parameter to allow qemu-img to write to the target out of order rather than sequential. This improves performance as the writes do not have to wait for each other to complete. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: add skip option to ddReda Sallahi2016-09-201-2/+2
| | | | | | | | | | | This adds the skip option which allows qemu-img dd to skip a number of blocks before copying the input. A test case was added to test the skip option. Signed-off-by: Reda Sallahi <fullmanet@gmail.com> Message-id: 20160810141609.32727-1-fullmanet@gmail.com Signed-off-by: Max Reitz <mreitz@redhat.com>
* qemu-img: add the 'dd' subcommandReda Sallahi2016-09-201-0/+6
| | | | | | | | | | | | | | | | | | | This patch adds a basic dd subcommand analogous to dd(1) to qemu-img. For the start, this implements the bs, if, of and count options and requires both if and of to be specified (no stdin/stdout if not specified) and doesn't support tty, pipes, etc. The image format must be specified with -O for the output if the raw format is not the intended one. Two tests are added to test qemu-img dd. Signed-off-by: Reda Sallahi <fullmanet@gmail.com> Message-id: 20160810024312.14544-1-fullmanet@gmail.com Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> [mreitz: Moved test 158 to 170] Signed-off-by: Max Reitz <mreitz@redhat.com>
* qemu-img bench: Add --flush-intervalKevin Wolf2016-06-081-2/+2
| | | | | | | | This options allows to flush the image periodically during write tests. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img bench: Implement -S (step size)Kevin Wolf2016-06-081-2/+2
| | | | | | | | | | | | With this new option, qemu-img bench can be told to advance the current offset after each request by a different value than the buffer size. This is useful for controlling the conditions for cluster allocation in image formats (e.g. qcow2 cluster allocation with COW in front of the request, or COW areas that aren't overwritten immediately). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img bench: Make start offset configurableKevin Wolf2016-06-081-2/+2
| | | | | | | | | This patch adds an option the specify the offset of the first request made by qemu-img bench. This allows to benchmark misaligned requests. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img bench: Sequential writesKevin Wolf2016-06-081-2/+2
| | | | | | | | | This extends qemu-img bench with an option that makes it use sequential writes instead of reads for the test run. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img benchKevin Wolf2016-06-081-0/+6
| | | | | | | | | | | This adds a qemu-img command that allows doing some simple benchmarks for the block layer without involving guest devices and a real VM. For the start, this implements only a test of sequential reads. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: allow specifying image as a set of options argsDaniel P. Berrange2016-02-221-22/+22
| | | | | | | | | | | | | | | | | | | Currently qemu-img allows an image filename to be passed on the command line, but unless using the JSON format, it does not have a way to set any options except the format eg qemu-img info https://127.0.0.1/images/centos7.iso This adds a --image-opts arg that indicates that the positional filename should be interpreted as a full option string, not just a filename. qemu-img info --image-opts driver=https,url=https://127.0.0.1/images,sslverify=off This flag is mutually exclusive with the '-f' / '-F' flags. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: add support for --object command line argDaniel P. Berrange2016-02-221-22/+22
| | | | | | | | | | | | | | | Allow creation of user creatable object types with qemu-img via a new --object command line arg. This will be used to supply passwords and/or encryption keys to the various block driver backends via the recently added 'secret' object type. # printf letmein > mypasswd.txt # qemu-img info --object secret,id=sec0,file=mypasswd.txt \ ...other info args... Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Add progress output for amendMax Reitz2014-11-031-2/+2
| | | | | | | | | | | | Now that bdrv_amend_options() supports a status callback, use it to display a progress report. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1414404776-4919-3-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: Specify backing file for commitMax Reitz2014-11-031-2/+2
| | | | | | | | | | | | | | | Introduce a new parameter for qemu-img commit which may be used to explicitly specify the backing file into which an image should be committed if the backing chain has more than a single layer. [Applied Eric Blake's qemu-img.texi documentation rewording --Stefan] Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1414159063-25977-12-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: Enable progress output for commitMax Reitz2014-11-031-2/+2
| | | | | | | | | | | Implement progress output for the commit command by querying the progress of the block job. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1414159063-25977-11-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: Empty image after commitMax Reitz2014-11-031-2/+2
| | | | | | | | | | | After the top image has been committed, it should be emptied unless specified otherwise. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1414159063-25977-10-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: Allow cache mode specification for amendMax Reitz2014-08-221-2/+2
| | | | | | | | | | | qemu-img amend may extensively modify the target image, depending on the options to be amended (e.g. conversion to qcow2 compat level 0.10 from 1.1 for an image with many unallocated zero clusters). Therefore it makes sense to allow the user to specify the cache mode to be used. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Allow source cache mode specificationMax Reitz2014-08-221-8/+8
| | | | | | | | | | | | | | | | | | | Many qemu-img subcommands only read the source file(s) once. For these use cases, a full write-back cache is unnecessary and mainly clutters host cache memory. Though this is generally no concern as cache memory is freely available and can be scaled by the host OS, it may become a concern with thin provisioning. For these cases, it makes sense to allow users to freely specify the source cache mode (e.g. use no cache at all). This commit adds a new switch (-T) for the qemu-img subcommands check, compare, convert and rebase to specify the cache to be used for source images (the backing file in case of rebase). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: add -l for snapshot in convertWenchao Xia2013-12-041-2/+2
| | | | | | | | Now qemu-img convert have similar options as qemu-nbd for internal snapshot. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* block: Image file option amendmentMax Reitz2013-09-121-0/+6
| | | | | | | | | | This patch adds the "amend" option to qemu-img which allows changing image options on existing image files. It also adds the generic bdrv implementation which is basically just a wrapper for the image format specific function. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: add a "map" subcommandPaolo Bonzini2013-09-061-0/+6
| | | | | | | | This command dumps the metadata of an entire chain, in either tabular or JSON format. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* add qemu-img convert -n option (skip target volume creation)Alexandre Derumier2013-09-061-2/+2
| | | | | | | | | | | | | | Add a -n option to skip volume creation on qemu-img convert. This is useful for targets such as rbd / ceph, where the target volume may already exist; we cannot always rely on qemu-img convert to create the image, as dependent on the output format, there may be parameters which are not possible to specify through the qemu-img convert command line. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Alexandre Derumier <aderumier@odiso.com> Signed-off-by: Alex Bligh <alex@alex.org.uk> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: Add compare subcommandMiroslav Rezanina2013-02-221-0/+6
| | | | | | | | | This patch adds new qemu-img subcommand that compares content of two disk images. Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: Add "Quiet mode" optionMiroslav Rezanina2013-02-221-14/+14
| | | | | | | | | There can be a need to turn output to stdout off. This patch adds a -q option that enable "Quiet mode". In Quiet mode, only errors are printed out. Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* qemu-img: add json output option to the check commandFederico Simoncelli2013-02-221-2/+2
| | | | | | | | | This option --output=[human|json] makes qemu-img check output a human or JSON representation at the choice of the user. Signed-off-by: Federico Simoncelli <fsimonce@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: document 'info --backing-chain'Kashyap Chamarthy2012-10-241-2/+2
| | | | | | Signed-off-by: Kashyap Chamarthy <kashyap.cv@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Add json output option to the info command.Benoît Canet2012-09-121-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* qemu-img check -r for repairing imagesKevin Wolf2012-06-151-2/+2
| | | | | | | | | | | | 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>
* Documentation: Add qemu-img -t parameter in man pageKevin Wolf2011-12-151-3/+3
| | | | | Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
* qemu-img: Require larger zero areas for sparse handlingKevin Wolf2011-08-291-2/+2
| | | | | | | | | | | 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>
* Add missing documentation for qemu-img -pJes Sorensen2011-07-201-2/+2
| | | | | Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Add cache command line optionFederico Simoncelli2011-07-051-3/+3
| | | | | | | | | | | | | | 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>
* qemu-img: Initial progress printing supportJes Sorensen2011-04-071-2/+2
| | | | | | | | | | 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>
* Copy snapshots out of QCOW2 diskedison2010-10-221-2/+2
| | | | | | | | | | | | | | In order to backup snapshots, created from QCOW2 iamge, we want to copy snapshots out of QCOW2 disk to a seperate storage. The following patch adds a new option in "qemu-img": qemu-img convert -f qcow2 -O qcow2 -s snapshot_name src_img bck_img. Right now, it only supports to copy the full snapshot, delta snapshot is on the way. Changes from V1: all the comments from Kevin are addressed: Add read-only checking Fix coding style Change the name from bdrv_snapshot_load to bdrv_snapshot_load_tmp Signed-off-by: Disheng Su <edison@cloud.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img: Fix copy+paste bug in documentationStefan Weil2010-07-131-1/+1
| | | | | | | | | | Replace rebase by resize in documentation of resize command. Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Cc: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* Fix TEXI section mark imbalance in qemu-img-cmd.hxJan Kiszka2010-05-221-1/+1
| | | | | Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
* qemu-img: Add 'resize' command to grow/shrink disk imagesStefan Hajnoczi2010-05-031-0/+6
| | | | | | | | | This patch adds a 'resize' command to grow/shrink disk images. This allows changing the size of disk images without copying to a new image file. Currently only raw files support resize. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qemu-img rebase: Document -f optionKevin Wolf2010-03-141-2/+2
| | | | | | | | The option was implemented in e53dbee0, but I forgot documenting it. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
* qemu-img rebaseKevin Wolf2010-01-141-0/+6
| | | | | | | | | | | | | | | | | | | This adds a rebase subcommand to qemu-img which allows to change the backing file of an image. In default mode, both the current and the new backing file need to exist, and after the rebase, the COW image is guaranteed to have the same guest visible content as before. To achieve this, old and new backing file are compared and, if necessary, data is copied from the old backing file into the COW image. With -u an unsafe mode is enabled that doesn't require the backing files to exist. It merely changes the backing file reference in the COW image. This is useful for renaming or moving the backing file. The user is responsible to make sure that the new backing file has no changes compared to the old one, or corruption may occur. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* Documentation: Don't mention old qemu-img optionsKevin Wolf2009-11-091-4/+4
| | | | | | | | | | | The old options are still supported for compatibility, but they are inconsistent (for example create -b vs. convert -B for backing files) and incomplete (-F only exists for create) which tends to confuse people. Remove all references to the old options from the documentation to guide users to the more consistent -o options. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* Use hxtool for qemu-img command listStuart Brady2009-06-071-0/+47
Use hxtool to generate the 'command syntax' section of qemu-img's help message, and the corresponding section of the texinfo documentation. This has the side-effect of adding 'check' to this list of commands in the texinfo documentation. Signed-off-by: Stuart Brady <stuart.brady@gmail.com>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-12-22 21:20:44 +0100