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2013-03-15block: Add options QDict to bdrv_open() prototypeKevin Wolf
It doesn't do anything yet except storing the options QDict in the BlockDriverState. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-22block: implement BDRV_O_UNMAPPaolo Bonzini
It is better to present homogeneous hardware independent of the storage technology that is chosen on the host, hence we make discard a host parameter; the user can choose whether to pass it down to the image format and protocol, or to ignore it. Using DISCARD with filesystems can cause very severe fragmentation, so it is left default-off for now. This can change later when we implement the "anchor" operation for efficient management of preallocated files. There is still one choice to make: whether DISCARD has an effect on the dirty bitmap or not. I chose yes, though there is a disadvantage: if the guest is buggy and issues discards for data that is in use, there will be no way to migrate storage for that guest without downgrading the machine type to an older one. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19block: move include files to include/block/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-12qemu-io: Add AIO debugging commandsKevin Wolf
This makes the blkdebug suspend/resume functionality available in qemu-io. Use it like this: $ ./qemu-io blkdebug::/tmp/test.qcow2 qemu-io> break write_aio req_a qemu-io> aio_write 0 4k qemu-io> blkdebug: Suspended request 'req_a' qemu-io> resume req_a blkdebug: Resuming request 'req_a' qemu-io> wrote 4096/4096 bytes at offset 0 4 KiB, 1 ops; 0:00:30.71 (133.359788 bytes/sec and 0.0326 ops/sec) Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-12-11qemu-io: Implement write -c for compressed clustersKevin Wolf
This makes it easier to create images with both compressed and uncompressed clusters for testing. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-11-14qemu-io: Use bdrv_drain_all instead of qemu_aio_flushKevin Wolf
This is harmless as of today because I/O throttling is not used in qemu-io, however as soon as .bdrv_drain handlers will be introduced, qemu-io must be sure to call bdrv_drain_all(). Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-11-06tools: initialize main loop before block layerPaolo Bonzini
Tools were broken because they initialized the block layer while qemu_aio_context was still NULL. Reported-by: malc <av1474@comtv.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: malc <av1474@comtv.ru>
2012-08-06qemu-io: add "abort" command to simulate program crashStefan Hajnoczi
Avoiding data loss and corruption is the top requirement for image file formats. The qemu-io "abort" command makes it possible to simulate program crashes and does not give the image format a chance to cleanly shut down. This command is useful for data integrity test cases. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-07-17qemu-io: Fix memory leaksKevin Wolf
Almost all callers of create_iovec() forgot to destroy the qiov when the request has completed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-05-10qemu-io: fix the alloc commandPaolo Bonzini
Because sector_num is not updated, the loop would either go on forever or return garbage. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-io: use main_loop_waitPaolo Bonzini
This will let timers run during aio_read and aio_write commands, though not during synchronous commands. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-io: Add command line switch for cache modeKevin Wolf
To be used as in 'qemu-io -t writeback test.img' Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-05qemu-io: add option to enable tracingStefan Hajnoczi
It can be useful to enable QEMU tracing when trying out block layer interfaces via qemu-io. Tracing can be enabled using the new -T FILE option where the given file contains a list of trace events to enable (just like the qemu --trace events=FILE option). $ echo qemu_vfree >my-events $ ./qemu-io -T my-events ... Remember to use ./configure --enable-trace-backend=BACKEND when building qemu-io. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-02-29qemu-io: fix segment fault when the image format is qedZhi Yong Wu
[root@f15 qemu]# qemu-io -c info /home/zwu/work/misc/rh6.img format name: qed cluster size: 64 KiB vm state offset: 0.000000 bytes Segmentation fault (core dumped) This reason is same as the former patch 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>
2012-02-09qemu-io: add write -z option for bdrv_co_write_zeroesStefan Hajnoczi
Extend the qemu-io write command with the -z option to call bdrv_co_write_zeroes(). Exposing the zero write interface from qemu-io allows us to write tests that exercise this new block layer interface. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-01-27Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori
* kwolf/for-anthony: (22 commits) scsi: Guard against buflen exceeding req->cmd.xfer in scsi_disk_emulate_command qcow: Use bdrv functions to replace file operation qcow: Return real error code in qcow_open block/vdi: Zero unused parts when allocating a new block (fix #919242) virtio-blk: add virtio_blk_handle_read trace event docs: describe live block operations block: add support for partial streaming add QERR_BASE_NOT_FOUND block: add bdrv_find_backing_image blockdev: make image streaming safe across hotplug qmp: add query-block-jobs qmp: add block_job_cancel command qmp: add block_job_set_speed command qmp: add block_stream command block: rate-limit streaming operations block: add image streaming block job block: add BlockJob interface for long-running operations block: make copy-on-read a per-request flag block: check bdrv_in_use() before blockdev operations coroutine: add co_sleep_ns() coroutine sleep function ...
2012-01-27qemu-io: end aio help text sentences with periodsLaszlo Ersek
Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-01-26block: replace unchecked strdup/malloc/calloc with glibStefan Hajnoczi
Most of the codebase as been converted to use glib memory allocation functions. There are still a few instances of malloc/calloc in the block layer and qemu-io. Replace them, especially since they do not check the strdup/malloc/calloc return value. Reported-by: Dr David Alan Gilbert <davidagilbert@uk.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-12-15block: bdrv_aio_* do not return NULLPaolo Bonzini
Initially done with the following semantic patch: @ rule1 @ expression E; statement S; @@ E = ( bdrv_aio_readv | bdrv_aio_writev | bdrv_aio_flush | bdrv_aio_discard | bdrv_aio_ioctl ) (...); ( - if (E == NULL) { ... } | - if (E) { <... S ...> } ) which however missed the occurrence in block/blkverify.c (as it should have done), and left behind some unused variables. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-12-05Merge remote-tracking branch 'kwolf/for-anthony' into stagingAnthony Liguori
2011-12-05block: convert qemu_aio_flush() calls to bdrv_drain_all()Stefan Hajnoczi
Many places in QEMU call qemu_aio_flush() to complete all pending asynchronous I/O. Most of these places actually want to drain all block requests but there is no block layer API to do so. This patch introduces the bdrv_drain_all() API to wait for requests across all BlockDriverStates to complete. As a bonus we perform checks after qemu_aio_wait() to ensure that requests really have finished. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-12-02fix spelling in main directoryDong Xu Wang
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-11-04qemu-io: Fix multiwrite_f error handlingKevin Wolf
Without this fix, some qiovs can be leaked if an error occurs. Also a semicolon at the end of the command line would make the code walk beyond the end of argv. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-11-04qemu-io: Handle create_iovec errorsKevin Wolf
Callers of create_iovec() didn't check for failure and continued with uninitialised data in error cases. This patch adds checks to each call. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-28qemu-io: delete bs instead of leaking itStefan Hajnoczi
Using bdrv_close() is not enough to free a BlockDriverState. Since we explicitly create it with bdrv_new(), use bdrv_delete() to close and delete it. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-21fix memory leak in aio_write_fAlex Jia
Haven't released memory of 'ctx' before return. Signed-off-by: Alex Jia <ajia@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-16Remove blanks before \n in output stringsStefan Weil
Those blanks violate the coding conventions, see scripts/checkpatch.pl. Blanks missing after colons in the changed lines were added. This patch does not try to fix tabs, long lines and other problems in the changed lines, therefore checkpatch.pl reports many violations. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-09-10qemu-io: remove unnecessary assignmentBlue Swirl
Remove an unnecessary assignment, spotted by clang analyzer: /src/qemu/qemu-io.c:995:9: warning: Value stored to 'offset' is never read offset += reqs[i].qiov->size; Acked-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-18qemu-io: Fix if scoping bugDevin Nakamura
Fix a bug caused by lack of braces in if statement Lack of braces means that if(count & 0x1ff) is never reached Signed-off-by: Devin Nakamura <devin122@gmail.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-07-18qemu-io: Fix formattingDevin Nakamura
Replaced tabs with spaces, 8 space indentations with 4 space indentation, and other fixes to better adhere to CODING_STYLE Signed-off-by: Devin Nakamura <devin122@gmail.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-08block: clarify the meaning of BDRV_O_NOCACHEChristoph Hellwig
Change BDRV_O_NOCACHE to only imply bypassing the host OS file cache, but no writeback semantics. All existing callers are changed to also specify BDRV_O_CACHE_WB to give them writeback semantics. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-01-31qemu-io: Fix discard commandKevin Wolf
qemu-io passed bytes where it's supposed to pass sectors, so discard requests were off. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-01-12qemu-io: fix a memory leakBlue Swirl
Fix a memory leak, reported by cppcheck: [/src/qemu/qemu-io.c:1135]: (error) Memory leak: ctx Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-17qemu-io: Fix typo in help textsKevin Wolf
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17qemu-io: Add discard commandStefan Hajnoczi
discard [-Cq] off len -- discards a number of bytes at a specified offset discards a range of bytes from the given offset Example: 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file Discards a segment of the currently open file. -C, -- report statistics in a machine parsable format -q, -- quite mode, do not show I/O statistics Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-17Remove NULL checks for bdrv_new return valueKevin Wolf
It's an indirect call to qemu_malloc, which never returns an error. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-10-22qemu-io: New command mapKevin Wolf
The new map command in qemu-io lists all allocated/unallocated areas in an image file. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-09-21use qemu_blockalign consistentlyChristoph Hellwig
Use qemu_blockalign for all allocations in the block layer. This allows increasing the required alignment, which is need to support O_DIRECT on devices with large block sizes. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-09-08qemu-io: Make alloc output useful when nb_sectors=1Stefan Hajnoczi
There is no indication whether or not the sector is allocated when nb_sectors=1: sector allocated at offset 64 KiB This message is produced whether or not the sector is allocated. Simply use the same message as the plural case, I don't think the English is so broken that we need special case output here: 0/1 sectors allocated at offset 64 KiB This change does not affect qemu-iotests since nb_sectors=1 is not used there. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-07-30fix variable type in qemu-io.cJoel Schopp
The variable len can get a negative return value from cvtnum, which we check for, but which is impossible with the current unsigned variable type. Currently the if(len < 0) check is pointless. This patch fixes that. Signed-off-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-04qemu-io: Fix error messagesKevin Wolf
The truncate and getlength commands passed a negative error number to strerror. They also happen to be the two functions that are lacking a newline at the end of their error message. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-05-28qemu-io: Add multiwrite commandKevin Wolf
The new multiwrite commands allows to use qemu-io for testing bdrv_aio_multiwrite. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-05-22Fix %lld or %llx printf format useBlue Swirl
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-04-23block: get rid of the BDRV_O_FILE flagChristoph Hellwig
BDRV_O_FILE is only used to communicate between bdrv_file_open and bdrv_open. It affects two things: first bdrv_open only searches for protocols using find_protocol instead of all image formats and host drivers. We can easily move that to the caller and pass the found driver to bdrv_open. Second it is used to not force a read-write open of a snapshot file. But we never use bdrv_file_open to open snapshots and this behaviour doesn't make sense to start with. qemu-io abused the BDRV_O_FILE for it's growable option, switch it to using bdrv_file_open to make sure we only open files as growable were we can actually support that. This patch requires Kevin's "[PATCH] Replace calls of old bdrv_open" to be applied first. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-04-23Replace calls of old bdrv_openKevin Wolf
What is known today as bdrv_open2 becomes the new bdrv_open. All remaining callers of the old function are converted to the new one. In some places they even know the right format, so they should have used bdrv_open2 from the beginning. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-03-28qemu-io: fix aio help textsChristoph Hellwig
Fix a few typos in the help texts for the various aio commands. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-03-27qemu-io: Fix return value handling of bdrv_openRyota Ozaki
bdrv_open may return -errno so we have to check if the return value is '< 0', not '== -1'. Signed-off-by: Ryota Ozaki <ozaki.ryota@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-01-26block: kill BDRV_O_CREATChristoph Hellwig
The BDRV_O_CREAT option is unused inside qemu and partially duplicates the bdrv_create method. Remove it, and the -C option to qemu-io which isn't used in qemu-iotests anyway. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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