- 08 6月, 2016 1 次提交
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由 Kevin Wolf 提交于
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: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NDenis V. Lunev <den@openvz.org> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 22 2月, 2016 2 次提交
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由 Daniel P. Berrange 提交于
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: NDaniel P. Berrange <berrange@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Daniel P. Berrange 提交于
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: NEric Blake <eblake@redhat.com> Signed-off-by: NDaniel P. Berrange <berrange@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 26 1月, 2016 1 次提交
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由 Sitsofe Wheeler 提交于
Signed-off-by: NSitsofe Wheeler <sitsofe@yahoo.com> Message-Id: <1452718226-25001-1-git-send-email-sitsofe@yahoo.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 11 9月, 2015 1 次提交
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由 Daniel P. Berrange 提交于
Many source files have doubled words (eg "the the", "to to", and so on). Most of these can simply be removed, but a couple were actual mis-spellings (eg "to to" instead of "to do"). There was even one triple word score "to to to" :-) Signed-off-by: NDaniel P. Berrange <berrange@redhat.com> Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
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- 03 11月, 2014 4 次提交
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由 Max Reitz 提交于
Now that bdrv_amend_options() supports a status callback, use it to display a progress report. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NBenoît Canet <benoit.canet@nodalink.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Message-id: 1414404776-4919-3-git-send-email-mreitz@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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由 Max Reitz 提交于
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: NMax Reitz <mreitz@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-id: 1414159063-25977-12-git-send-email-mreitz@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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由 Max Reitz 提交于
Implement progress output for the commit command by querying the progress of the block job. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Message-id: 1414159063-25977-11-git-send-email-mreitz@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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由 Max Reitz 提交于
After the top image has been committed, it should be emptied unless specified otherwise. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Message-id: 1414159063-25977-10-git-send-email-mreitz@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 22 9月, 2014 1 次提交
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由 Stefan Hajnoczi 提交于
This patch removes support for the cow file format. Normally we do not break backwards compatibility but in this case there is no impact and it is the most logical option. Extraordinary claims require extraordinary evidence so I will show why removing the cow block driver is the right thing to do. The cow file format is the disk image format for Usermode Linux, a way of running a Linux system in userspace. The performance of UML was never great and it was hacky, but it enjoyed some popularity before hardware virtualization support became mainstream. QEMU's block/cow.c is supposed to read this image file format. Unfortunately the file format was underspecified: 1. Earlier Linux versions used the MAXPATHLEN constant for the backing filename field. The value of MAXPATHLEN can change, so Linux switched to a 4096 literal but QEMU has a 1024 literal. 2. Padding was not used on the header struct (both in the Linux kernel and in QEMU) so the struct layout varied across architectures. In particular, i386 and x86_64 were different due to int64_t alignment differences. Linux now uses __attribute__((packed)), QEMU does not. Therefore: 1. QEMU cow images do not conform to the Linux cow image file format. 2. cow images cannot be shared between different host architectures. This means QEMU cow images are useless and QEMU has not had bug reports from users actually hitting these issues. Let's get rid of this thing, it serves no purpose and no one will be affected. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NMarkus Armbruster <armbru@redhat.com> Message-id: 1410877464-20481-1-git-send-email-stefanha@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 12 9月, 2014 2 次提交
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由 Hu Tao 提交于
preallocation=falloc allocates disk space by posix_fallocate(), preallocation=full allocates disk space by writing zeros to disk. Both modes imply preallocation=metadata. Signed-off-by: NHu Tao <hutao@cn.fujitsu.com> Reviewed-by: NMax Reitz <mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Hu Tao 提交于
This patch adds a new option preallocation for raw format, and implements falloc and full preallocation. Signed-off-by: NHu Tao <hutao@cn.fujitsu.com> Reviewed-by: NMax Reitz <mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 08 9月, 2014 2 次提交
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由 Stefan Hajnoczi 提交于
The src_cache option (-T) specifies the cache mode for backing files. It applies both the image's old backing file as well as the new backing file: ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags, old_backing_drv, &local_err); if (ret) { ... } if (out_baseimg[0]) { bs_new_backing = bdrv_new("new_backing", &error_abort); ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags, new_backing_drv, &local_err); if (ret) { ... } } The documentation only mentions the new backing file but it really applies to both. Suggested-by: NJeff Nelson <jenelson@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com>
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由 Stefan Hajnoczi 提交于
The source cache option takes the same values as the cache option. The documentation reads a little strange because it starts with "In contrast the src_cache option ...". The fact that this is comparing with the previous documented option (the 'cache' option) is implicit. Readers may be confused, especially if they jump to src_cache without reading cache documentation first. Suggested-by: NJeff Nelson <jenelson@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com>
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- 22 8月, 2014 2 次提交
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由 Max Reitz 提交于
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: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
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: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 07 7月, 2014 1 次提交
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由 Chunyan Liu 提交于
Signed-off-by: NChunyan Liu <cyliu@suse.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 01 7月, 2014 1 次提交
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由 Chunyan Liu 提交于
Add 'nocow' option so that users could have a chance to set NOCOW flag to newly created files. It's useful on btrfs file system to enhance performance. Btrfs has low performance when hosting VM images, even more when the guest in those VM are also using btrfs as file system. One way to mitigate this bad performance is to turn off COW attributes on VM files. Generally, there are two ways to turn off NOCOW on btrfs: a) by mounting fs with nodatacow, then all newly created files will be NOCOW. b) per file. Add the NOCOW file attribute. It could only be done to empty or new files. This patch tries the second way, according to the option, it could add NOCOW per file. For most block drivers, since the create file step is in raw-posix.c, so we can do setting NOCOW flag ioctl in raw-posix.c only. But there are some exceptions, like block/vpc.c and block/vdi.c, they are creating file by calling qemu_open directly. For them, do the same setting NOCOW flag ioctl work in them separately. [Fixed up 082.out due to the new 'nocow' creation option --Stefan] Signed-off-by: NChunyan Liu <cyliu@suse.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 04 6月, 2014 1 次提交
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由 Max Reitz 提交于
The exit code 63 (check not supported by image format) was not even documented in the comment above the check command in the source code; add it, as it does indeed seem useful. Also, document all of check's exit codes in the manpage. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reported-by: NMarkus Armbruster <armbru@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NBenoit Canet <benoit@irqsave.net> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 01 2月, 2014 1 次提交
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由 Daniel P. Berrange 提交于
The qemu-img.texi / qemu-doc.texi files currently describe the qcow2/qcow2 encryption thus "Encryption uses the AES format which is very secure (128 bit keys). Use a long password (16 characters) to get maximum protection." While AES is indeed a strong encryption system, the way that QCow/QCow2 use it results in a poor/weak encryption system. Due to the use of predictable IVs, based on the sector number extended to 128 bits, it is vulnerable to chosen plaintext attacks which can reveal the existence of encrypted data. The direct use of the user passphrase as the encryption key also leads to an inability to change the passphrase of an image. If passphrase is ever compromised the image data will all be vulnerable, since it cannot be re-encrypted. The admin has to clone the image files with a new passphrase and then use a program like shred to secure erase all the old files. Recommend against any use of QCow/QCow2 encryption, directing users to dm-crypt / LUKS which can meet modern cryptography best practices. [Changed "Qcow" to "qcow" for consistency. --Stefan] Signed-off-by: NDaniel P. Berrange <berrange@redhat.com> Reviewed-by: NMarkus Armbruster <armbru@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 24 1月, 2014 2 次提交
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由 Jeff Cody 提交于
This updates the documentation for commiting snapshot images. Specifically, this highlights what happens when the base image is either smaller or larger than the snapshot image being committed. In the case of the base image being smaller, it is resized to the larger size of the snapshot image. In the case of the base image being larger, it is not resized automatically, but once the commit has completed it is safe for the user to truncate the base image. Signed-off-by: NJeff Cody <jcody@redhat.com> Reviewed-by: NFam Zheng <famz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Kevin Wolf 提交于
Document the SIGUSR1 behaviour of qemu-img. Also, added compare to the list of subcommands that support -p. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NBenoit Canet <benoit@irqsave.net>
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- 22 1月, 2014 1 次提交
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由 Stefan Hajnoczi 提交于
Commit 9117b477 ("qcow2: Change default for new images to compat=1.1") changed the default qcow2 image format version but forgot to update qemu-doc.texi and qemu-img.texi. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 20 12月, 2013 1 次提交
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由 Jeff Cody 提交于
The man page for qemu-img, and the qemu-doc, did not mention VHDX as a supported format. This adds in reference to VHDX in those documents. [Stefan Weil <sw@weilnetz.de> suggested s/Block Size/Block size/ for consistency. I have made this change. --Stefan] Signed-off-by: NJeff Cody <jcody@redhat.com> Reviewed-by: NStefan Weil <sw@weilnetz.de> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 04 12月, 2013 1 次提交
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由 Wenchao Xia 提交于
Now qemu-img convert have similar options as qemu-nbd for internal snapshot. Signed-off-by: NWenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 28 11月, 2013 1 次提交
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由 Peter Lieven 提交于
Signed-off-by: NPeter Lieven <pl@kamp.de> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 12 9月, 2013 1 次提交
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由 Max Reitz 提交于
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: NMax Reitz <mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 06 9月, 2013 2 次提交
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由 Paolo Bonzini 提交于
Eric Blake also requested including the output in qapi-schema.json, so that it is published through the introspection mechanism. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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由 Alexandre Derumier 提交于
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: NEric Blake <eblake@redhat.com> Signed-off-by: NAlexandre Derumier <aderumier@odiso.com> Signed-off-by: NAlex Bligh <alex@alex.org.uk> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 23 2月, 2013 3 次提交
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由 Miroslav Rezanina 提交于
This patch adds new qemu-img subcommand that compares content of two disk images. Signed-off-by: NMiroslav Rezanina <mrezanin@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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由 Miroslav Rezanina 提交于
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: NMiroslav Rezanina <mrezanin@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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由 Federico Simoncelli 提交于
This option --output=[human|json] makes qemu-img check output a human or JSON representation at the choice of the user. Signed-off-by: NFederico Simoncelli <fsimonce@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 30 11月, 2012 1 次提交
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由 Kevin Wolf 提交于
Document new and yet undocumented options and image formats. The qemu-img man page contains information only for raw and qcow2 now and references the HTML documentation for a more detailed description of other formats. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Acked-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 24 10月, 2012 2 次提交
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由 Kashyap Chamarthy 提交于
Signed-off-by: NKashyap Chamarthy <kashyap.cv@gmail.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Alex Bligh 提交于
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: NAlex Bligh <alex@alex.org.uk> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 14 9月, 2012 1 次提交
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由 Stefan Weil 提交于
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: NStefan Weil <sw@weilnetz.de> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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- 12 9月, 2012 1 次提交
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由 Benoît Canet 提交于
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: NBenoit Canet <benoit@irqsave.net> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 18 8月, 2012 1 次提交
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由 Kevin Wolf 提交于
People have repeatedly expected that you can do things like snapshotting an image with qemu-img while a qemu instance is running. Maybe we need to consider locking the files while they are in use, but having a warning in the qemu-img manpage is doable for 1.2 and can't hurt anyway. Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 15 6月, 2012 2 次提交
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由 Stefan Hajnoczi 提交于
The qemu-img.1 man page is missing the qed format from its list of supported formats. Document the image creation options for qed. Suggested-by: NMichael Tokarev <mjt@tls.msk.ru> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Kevin Wolf 提交于
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: NKevin Wolf <kwolf@redhat.com>
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