- 05 12月, 2011 3 次提交
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由 Stefan Hajnoczi 提交于
This patch adds the .bdrv_co_is_allocated() interface which is identical to .bdrv_is_allocated() but runs in coroutine context. Running in coroutine context implies that other coroutines might be performing I/O at the same time. Therefore it must be safe to run while the following BlockDriver functions are in-flight: .bdrv_co_readv() .bdrv_co_writev() .bdrv_co_flush() .bdrv_co_is_allocated() The new .bdrv_co_is_allocated() interface is useful because it can be used when a VM is running, whereas .bdrv_is_allocated() is a synchronous interface that does not cope with parallel requests. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Zhi Yong Wu 提交于
Signed-off-by: NZhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Zhi Yong Wu 提交于
Signed-off-by: NZhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 22 11月, 2011 1 次提交
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由 Anthony Liguori 提交于
Image files have two types of data: immutable data that describes things like image size, backing files, etc. and mutable data that includes offset and reference count tables. Today, image formats aggressively cache mutable data to improve performance. In some cases, this happens before a guest even starts. When dealing with live migration, since a file is open on two machines, the caching of meta data can lead to data corruption. This patch addresses this by introducing a mechanism to invalidate any cached mutable data a block driver may have which is then used by the live migration code. NB, this still requires coherent shared storage. Addressing migration without coherent shared storage (i.e. NFS) requires additional work. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 11 11月, 2011 2 次提交
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由 Kevin Wolf 提交于
qcow2 has a writeback metadata cache, so flushing a qcow2 image actually consists of writing back that cache to the protocol and only then flushes the protocol in order to get everything stable on disk. This introduces a separate bdrv_co_flush_to_os to reflect the split. Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Kevin Wolf 提交于
There are two different types of flush that you can do: Flushing one level up to the OS (i.e. writing data to the host page cache) or flushing it all the way down to the disk. The existing functions flush to the disk, reflect this in the function name. Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 27 10月, 2011 2 次提交
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由 Luiz Capitulino 提交于
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
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由 Luiz Capitulino 提交于
A future commit will convert bdrv_info() to the QAPI and it won't provide IOS_INVAL. Luckily all we have to do is to add a new 'iostatus_enabled' member to BlockDriverState and use it instead. Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
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- 21 10月, 2011 4 次提交
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由 Paolo Bonzini 提交于
Since coroutine operation is now mandatory, convert both bdrv_discard implementations to coroutines. For qcow2, this means taking the lock around the operation. raw-posix remains synchronous. The bdrv_discard callback is then unused and can be eliminated. Reviewed-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Paolo Bonzini 提交于
Since coroutine operation is now mandatory, convert all bdrv_flush implementations to coroutines. For qcow2, this means taking the lock. Other implementations are simpler and just forward bdrv_flush to the underlying protocol, so they can avoid the lock. The bdrv_flush callback is then unused and can be eliminated. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Paolo Bonzini 提交于
This similarly adds support for coroutine and asynchronous discard. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Paolo Bonzini 提交于
Add coroutine support for flush and apply the same emulation that we already do for read/write. bdrv_aio_flush is simplified to always go through a coroutine. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 11 10月, 2011 1 次提交
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由 Luiz Capitulino 提交于
This commit adds support to the BlockDriverState type to keep track of devices' I/O status. There are three possible status: BDRV_IOS_OK (no error), BDRV_IOS_ENOSPC (no space error) and BDRV_IOS_FAILED (any other error). The distinction between no space and other errors is important because a management application may want to watch for no space in order to extend the space assigned to the VM and put it to run again. Qemu devices supporting the I/O status feature have to enable it explicitly by calling bdrv_iostatus_enable() _and_ have to be configured to stop the VM on errors (ie. werror=stop|enospc or rerror=stop). In case of multiple errors being triggered in sequence only the first one is stored. The I/O status is always reset to BDRV_IOS_OK when the 'cont' command is issued. Next commits will add support to some devices and extend the query-block/info block commands to return the I/O status information. Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com> Reviewed-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 12 9月, 2011 5 次提交
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由 Markus Armbruster 提交于
It's convenience stuff for block device models, so block.h isn't the ideal home either, but better than block_int.h. Permits moving some #include "block_int.h" from device model .h into .c. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
It's a confused mess (see previous commit). No users remain. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
While there, make the locked parameter bool. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
Requires new BlockDevOps member is_medium_locked(). Implement for IDE and SCSI CD-ROMs. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
Commit 4be9762a is now completely redone. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 06 9月, 2011 5 次提交
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由 Markus Armbruster 提交于
Device models should be able to use it without an unclean include of block_int.h. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
hw/fdc.c is the only one that cares. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
Multiplexing callbacks complicates matters needlessly. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
So we can more easily add device model callbacks. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
For now, this just protects against programming errors like having the same drive back multiple non-qdev devices, or untimely bdrv_delete(). Later commits will add other interesting uses. While there, rename BlockDriverState member peer to dev, bdrv_attach() to bdrv_attach_dev(), bdrv_detach() to bdrv_detach_dev(), and bdrv_get_attached() to bdrv_get_attached_dev(). Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 27 8月, 2011 1 次提交
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由 Christoph Hellwig 提交于
Account the total latency for read/write/flush requests. This allows management tools to average it based on a snapshot of the nr ops counters and allow checking for SLAs or provide statistics. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 26 8月, 2011 1 次提交
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由 Christoph Hellwig 提交于
Decouple the I/O accounting from bdrv_aio_readv/writev/flush and make the hardware models call directly into the accounting helpers. This means: - we do not count internal requests from image formats in addition to guest originating I/O - we do not double count I/O ops if the device model handles it chunk wise - we only account I/O once it actuall is done - can extent I/O accounting to synchronous or coroutine I/O easily - implement I/O latency tracking easily (see the next patch) I've conveted the existing device model callers to the new model, device models that are using synchronous I/O and weren't accounted before haven't been updated yet. Also scsi hasn't been converted to the end-to-end accounting as I want to defer that after the pending scsi layer overhaul. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 23 8月, 2011 1 次提交
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 02 8月, 2011 1 次提交
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由 Kevin Wolf 提交于
Add new block driver callbacks bdrv_co_readv/writev, which work on a QEMUIOVector like bdrv_aio_*, but don't need a callback. The function may only be called inside a coroutine, so a block driver implementing this interface can yield instead of blocking during I/O. Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 01 8月, 2011 2 次提交
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由 Markus Armbruster 提交于
Callees always return 0, except for FreeBSD's cdrom_eject(), which returns -ENOTSUP when the device is in a terminally wedged state. The only caller is bdrv_eject(), and it maps -ENOTSUP to 0 since commit 4be9762a. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
The only caller is bdrv_set_locked(), and it ignores the value. Callees always return 0, except for FreeBSD's cdrom_set_locked(), which returns -ENOTSUP when the device is in a terminally wedged state. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 19 7月, 2011 2 次提交
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由 Fam Zheng 提交于
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: NFam Zheng <famcool@gmail.com> Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Fam Zheng 提交于
Add create option 'format', with enums: monolithicSparse monolithicFlat twoGbMaxExtentSparse twoGbMaxExtentFlat Each creates a subformat image file. The default is monolithicSparse. Signed-off-by: NFam Zheng <famcool@gmail.com> Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 15 6月, 2011 1 次提交
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由 Devin Nakamura 提交于
Signed-off-by: NDevin Nakamura <devin122@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 19 5月, 2011 1 次提交
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由 Markus Armbruster 提交于
No users of bdrv_get_type_hint() left. bdrv_set_type_hint() can make the media removable by side effect. Make that explicit. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 07 2月, 2011 1 次提交
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由 Marcelo Tosatti 提交于
Certain operations such as drive_del or resize cannot be performed while external users (eg. block migration) reference the block device. Add a flag to indicate that. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 31 1月, 2011 1 次提交
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由 Christoph Hellwig 提交于
Extend the change_cb callback with a reason argument, and use it to tell drivers about size changes. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 17 12月, 2010 2 次提交
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由 Stefan Hajnoczi 提交于
This patch introduces the qed on-disk layout and implements image creation. Later patches add read/write and other functionality. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Christoph Hellwig 提交于
Add a new bdrv_discard method to free blocks in a mapping image, and a new drive property to set the granularity for these discard. If no discard granularity support is set discard support is disabled. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 14 12月, 2010 1 次提交
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由 Jes Sorensen 提交于
If -6 or -e is specified, an error message is printed and we exit. It does not print help() to avoid the error message getting lost in the noise. Signed-off-by: NJes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 12 12月, 2010 1 次提交
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由 Gleb Natapov 提交于
If bootindex is specified on command line a string that describes device in firmware readable way is added into sorted list. Later this list will be passed into firmware to control boot order. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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- 04 11月, 2010 1 次提交
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由 Kevin Wolf 提交于
This changes bdrv_flush to return 0 on success and -errno in case of failure. It's a requirement for implementing proper error handle in users of bdrv_flush. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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