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2015-07-14rbd: fix ceph settings precedenceJosh Durgin
Apply the ceph settings from a config file before any ceph settings from the command line. Since the ceph config file location may be specified on the command line, parse it once to read the config file, and do a second pass to apply the rest of the command line ceph options. Signed-off-by: Josh Durgin <jdurgin@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-07-14rbd: make qemu's cache setting override any ceph settingJosh Durgin
To be safe, when cache=none is used ceph settings should not be able to override it to turn on caching. This was previously possible with rbd_cache=true in the rbd device configuration or a ceph configuration file. Similarly, rbd settings could have turned off caching when qemu requested it, although this would just be a performance problem. Fix this by changing rbd's cache setting to match qemu after all other ceph settings have been applied. Signed-off-by: Josh Durgin <jdurgin@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-07-14rbd: remove unused constants and fieldsJosh Durgin
RBDAIOCB.status was only used for cancel, which was removed in 7691e24dbebb46658e89b3f950fda6ec78bbb823. RBDAIOCB.sector_num was never used. RADOSCB.done and rcbid were never used. RBD_FD* are obsolete since the pipe was removed in e04fb07fd1676e9facd7f3f878c1bbe03bccd26b. Signed-off-by: Josh Durgin <jdurgin@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-07-08Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
Bugfixes and Daniel Berrange's crypto library. # gpg: Signature made Wed Jul 8 12:12:29 2015 BST using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # gpg: WARNING: This key is not certified with sufficiently trusted signatures! # gpg: It is not certain that the signature belongs to the owner. # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: ossaudio: fix memory leak ui: convert VNC to use generic cipher API block: convert qcow/qcow2 to use generic cipher API ui: convert VNC websockets to use crypto APIs block: convert quorum blockdrv to use crypto APIs crypto: add a nettle cipher implementation crypto: add a gcrypt cipher implementation crypto: introduce generic cipher API & built-in implementation crypto: move built-in D3DES implementation into crypto/ crypto: move built-in AES implementation into crypto/ crypto: introduce new module for computing hash digests vl: move rom_load_all after machine init done Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-07-08block: convert qcow/qcow2 to use generic cipher APIDaniel P. Berrange
Switch the qcow/qcow2 block driver over to use the generic cipher API, this allows it to use the pluggable AES implementations, instead of being hardcoded to use QEMU's built-in impl. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1435770638-25715-10-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-07-08block: convert quorum blockdrv to use crypto APIsDaniel P. Berrange
Get rid of direct use of gnutls APIs in quorum blockdrv in favour of using the crypto APIs. This avoids the need to do conditional compilation of the quorum driver. It can simply report an error at file open file instead if the required hash algorithm isn't supported by QEMU. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1435770638-25715-8-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-07-07blockjob: add block_job_release functionTing Wang
There is job resource leak in function mirror_start_job, although bdrv_create_dirty_bitmap is unlikely failed. Add block_job_release for each release when needed. Signed-off-by: Ting Wang <kathy.wangting@huawei.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 1435311455-56048-1-git-send-email-kathy.wangting@huawei.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-07block/raw-posix: Don't think /dev/fd/<NN> is a floppy drive.Richard W.M. Jones
In libguestfs we use /dev/fd/<NN> to pass pre-opened file descriptors to qemu-img. Lately I've discovered that although this works, qemu believes that these are floppy disk images. That in itself isn't much of a problem, but now qemu prints a warning about host floppy pass-thru being deprecated. Extend the existing test so that it ignores /dev/fd/ as well as /dev/fdset/ A simple test of this, if you are using the bash shell, is: qemu-img info <( cat /dev/null ) without this patch: $ qemu-img info <( cat /dev/null ) qemu-img: Host floppy pass-through is deprecated Support for it will be removed in a future release. qemu-img: Could not open '/dev/fd/63': Could not refresh total sector count: Illegal seek with this patch: $ qemu-img info <( cat /dev/null ) qemu-img: Could not open '/dev/fd/63': Could not refresh total sector count: Illegal seek Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-id: 1435761614-31358-1-git-send-email-rjones@redhat.com Fixes: https://bugs.launchpad.net/qemu/+bug/1470536 Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-07block: Use bdrv_drain to replace uncessary bdrv_drain_allFam Zheng
There callers work on a single BlockDriverState subtree, where using bdrv_drain() is more accurate. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-07crypto: move built-in AES implementation into crypto/Daniel P. Berrange
To prepare for a generic internal cipher API, move the built-in AES implementation into the crypto/ directory Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1435770638-25715-3-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-07-07block: update bdrv_drain_all()/bdrv_drain() commentsStefan Hajnoczi
The doc comments for bdrv_drain_all() and bdrv_drain() are outdated: * The bdrv_drain() comment is a poor man's bdrv_lock()/bdrv_unlock() which Fam Zheng is currently developing. Unfortunately this warning was never really enough because devices keep submitting I/O and op blockers don't prevent that. * The bdrv_drain_all() comment is still partially correct but reflects the nature of the implementation rather than API documentation. Do make it clear that bdrv_drain() is only appropriate within an AioContext. For anything spanning AioContexts you need bdrv_drain_all(). Cc: Markus Armbruster <armbru@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 1435854281-6078-1-git-send-email-stefanha@redhat.com
2015-07-07qcow2: remove unnecessary checkAlberto Garcia
The value of 'i' is guaranteed to be >= 0 Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 1435824371-2660-1-git-send-email-berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02block: remove redundant check before g_slist_find()Alberto Garcia
An empty GSList is represented by a NULL pointer, therefore it's a perfectly valid argument for g_slist_find() and there's no need to make any additional check. Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 1435583533-5758-1-git-send-email-berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02block/nfs: limit maximum readahead size to 1MBPeter Lieven
a malicious caller could otherwise specify a very large value via the URI and force libnfs to allocate a large amount of memory for the readahead buffer. Cc: qemu-stable@nongnu.org Signed-off-by: Peter Lieven <pl@kamp.de> Message-id: 1435317241-25585-1-git-send-email-pl@kamp.de Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02block/iscsi: restore compatiblity with libiscsi 1.9.0Peter Lieven
RHEL7 and others are stuck with libiscsi 1.9.0 since there unfortunately was an ABI breakage after that release. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1435313881-19366-1-git-send-email-pl@kamp.de Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02block: Fix dirty bitmap in bdrv_co_discardFam Zheng
Unsetting dirty globally with discard is not very correct. The discard may zero out sectors (depending on can_write_zeroes_with_unmap), we should replicate this change to destination side to make sure that the guest sees the same data. Calling bdrv_reset_dirty also troubles mirror job because the hbitmap iterator doesn't expect unsetting of bits after current position. So let's do it the opposite way which fixes both problems: set the dirty bits if we are to discard it. Reported-by: wangxiaolong@ucloud.cn Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02mirror: Do zero write on target if sectors not allocatedFam Zheng
If guest discards a source cluster, mirroring with bdrv_aio_readv is overkill. Some protocols do zero upon discard, where it's best to use bdrv_aio_write_zeroes, otherwise, bdrv_aio_discard will be enough. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02qmp: Add optional bool "unmap" to drive-mirrorFam Zheng
If specified as "true", it allows discarding on target sectors where source is not allocated. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02block: Add bdrv_get_block_status_aboveFam Zheng
Like bdrv_is_allocated_above, this function follows the backing chain until seeing BDRV_BLOCK_ALLOCATED. Base is not included. Reimplement bdrv_is_allocated on top. [Initialized bdrv_co_get_block_status_above() ret to 0 to silence mingw64 compiler warning about the unitialized variable. assert(bs != base) prevents that case but I suppose the program could be compiled with -DNDEBUG. --Stefan] Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02qapi: Rename 'dirty-bitmap' mode to 'incremental'John Snow
If we wish to make differential backups a feature that's easy to access, it might be pertinent to rename the "dirty-bitmap" mode to "incremental" to make it clear what /type/ of backup the dirty-bitmap is helping us perform. This is an API breaking change, but 2.4 has not yet gone live, so we have this flexibility. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 1433463642-21840-2-git-send-email-jsnow@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02qcow2: Handle EAGAIN returned from update_refcountJindřich Makovička
Fixes a crash during image compression Signed-off-by: Jindřich Makovička <makovick@gmail.com> Tested-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-07-02block/iscsi: add support for request timeoutsPeter Lieven
libiscsi starting with 1.15 will properly support timeout of iscsi commands. The default will remain no timeout, but this can be changed via cmdline parameters, e.g.: qemu -iscsi timeout=30 -drive file=iscsi://... If a timeout occurs a reconnect is scheduled and the timed out command will be requeued for processing after a successful reconnect. The required API call iscsi_set_timeout is present since libiscsi 1.10 which was released in October 2013. However, due to some bugs in the libiscsi code the use is not recommended before version 1.15. Please note that this patch bumps the libiscsi requirement to 1.10 to have all function and macros defined. The patch fixes also a off-by-one error in the NOP timeout calculation which was fixed while touching these code parts. Signed-off-by: Peter Lieven <pl@kamp.de> Message-id: 1434455107-19328-1-git-send-email-pl@kamp.de Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23raw-posix: Introduce hdev_is_sg()Dimitris Aragiorgis
Until now, an SG device was identified only by checking if its path started with "/dev/sg". Then, hdev_open() would set the bs->sg flag accordingly. The patch relies on the actual properties of the device instead of the specified file path. To this end, test for an SG device (e.g. /dev/sg0) by ensuring that all of the following holds: - The specified file name corresponds to a character device - The device supports the SG_GET_VERSION_NUM ioctl - The device supports the SG_GET_SCSI_ID ioctl Signed-off-by: Dimitris Aragiorgis <dimara@arrikto.com> Message-id: 1435056300-14924-6-git-send-email-dimara@arrikto.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23raw-posix: Use DPRINTF for DEBUG_FLOPPYDimitris Aragiorgis
Get rid of several #ifdef DEBUG_FLOPPY and substitute them with DPRINTF. Signed-off-by: Dimitris Aragiorgis <dimara@arrikto.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435056300-14924-5-git-send-email-dimara@arrikto.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23raw-posix: DPRINTF instead of DEBUG_BLOCK_PRINTDimitris Aragiorgis
Building the QEMU tools fails if we #define DEBUG_BLOCK inside block/raw-posix.c. Here instead of adding qemu-log.o in block-obj-y so that DEBUG_BLOCK_PRINT can be used, we substitute the latter with a simple DPRINTF() (that does not cause bit-rot). Signed-off-by: Dimitris Aragiorgis <dimara@arrikto.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435056300-14924-4-git-send-email-dimara@arrikto.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23Fix migration in case of scsi-genericDimitris Aragiorgis
During migration, QEMU uses fsync()/fdatasync() on the open file descriptor for read-write block devices to flush data just before stopping the VM. However, fsync() on a scsi-generic device returns -EINVAL which causes the migration to fail. This patch skips flushing data in case of an SG device, since submitting SCSI commands directly via an SG character device (e.g. /dev/sg0) bypasses the page cache completely, anyway. Note that fsync() not only flushes the page cache but also the disk cache. The scsi-generic device never sends flushes, and for migration it assumes that the same SCSI device is used by the destination host, so it does not issue any SCSI SYNCHRONIZE CACHE (10) command. Finally, remove the bdrv_is_sg() test from iscsi_co_flush() since this is now redundant (we flush the underlying protocol at the end of bdrv_co_flush() which, with this patch, we never reach). Signed-off-by: Dimitris Aragiorgis <dimara@arrikto.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435056300-14924-3-git-send-email-dimara@arrikto.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23block: Use bdrv_is_sg() everywhereDimitris Aragiorgis
Instead of checking bs->sg use bdrv_is_sg() consistently throughout the code. Signed-off-by: Dimitris Aragiorgis <dimara@arrikto.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435056300-14924-2-git-send-email-dimara@arrikto.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23vvfat: add a label optionWolfgang Bumiller
Until now the vvfat volume label was hardcoded to be "QEMU VVFAT", now you can pass a file.label=labelname option to the -drive to change it. The FAT structure defines the volume label to be limited to 11 bytes and is filled up spaces when shorter than that. The trailing spaces however aren't exposed to the user by operating systems. [Added missing comment '#' characters in block-core.json to fix build errors. --Stefan] Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com> Message-id: 1434706529-13895-2-git-send-email-w.bumiller@proxmox.com Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23block-backend: Introduce blk_drain()Alexander Yarygin
This patch introduces the blk_drain() function which allows to replace blk_drain_all() when only one BlockDriverState needs to be drained. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Kevin Wolf <kwolf@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1434537440-28236-2-git-send-email-yarygin@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23throttle: Check current timers before updating any_timer_armed[]Alberto Garcia
Calling throttle_group_config() cancels all timers from a particular BlockDriverState, so any_timer_armed[] should be updated accordingly. However, with the current code it may happen that a timer is armed in a different BlockDriverState from the same group, so any_timer_armed[] would be set to false in a situation where there is still a timer armed. The consequence is that we might end up with two timers armed. This should not have any noticeable impact however, since all accesses to the ThrottleGroup are protected by a lock, and the situation would become normal again shortly thereafter as soon as all timers have been fired. The correct way to solve this is to check that we're actually cancelling a timer before updating any_timer_armed[]. Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 1434382875-3998-1-git-send-email-berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23block: Let bdrv_drain_all() to call aio_poll() for each AioContextAlexander Yarygin
After the commit 9b536adc ("block: acquire AioContext in bdrv_drain_all()") the aio_poll() function got called for every BlockDriverState, in assumption that every device may have its own AioContext. If we have thousands of disks attached, there are a lot of BlockDriverStates but only a few AioContexts, leading to tons of unnecessary aio_poll() calls. This patch changes the bdrv_drain_all() function allowing it find shared AioContexts and to call aio_poll() only for unique ones. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Kevin Wolf <kwolf@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-id: 1433936297-7098-4-git-send-email-yarygin@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-22Include qapi/qmp/qerror.h exactly where neededMarkus Armbruster
In particular, don't include it into headers. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22qerror: Move #include out of qerror.hMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22qerror: Finally unused, clean upMarkus Armbruster
Remove it except for two things in qerror.h: * Two #include to be cleaned up separately to avoid cluttering this patch. * The QERR_ macros. Mark as obsolete. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22qerror: Clean up QERR_ macros to expand into a single stringMarkus Armbruster
These macros expand into error class enumeration constant, comma, string. Unclean. Has been that way since commit 13f59ae. The error class is always ERROR_CLASS_GENERIC_ERROR since the previous commit. Clean up as follows: * Prepend every use of a QERR_ macro by ERROR_CLASS_GENERIC_ERROR, and delete it from the QERR_ macro. No change after preprocessing. * Rewrite error_set(ERROR_CLASS_GENERIC_ERROR, ...) into error_setg(...). Again, no change after preprocessing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22qobject: Use 'bool' for qboolEric Blake
We require a C99 compiler, so let's use 'bool' instead of 'int' when dealing with boolean values. There are few enough clients to fix them all in one pass. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Alberto Garcia <berto@igalia.com> Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-06-15Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell
Block layer core and image format patches # gpg: Signature made Fri Jun 12 16:08:53 2015 BST using RSA key ID C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" * remotes/kevin/tags/for-upstream: (25 commits) block: Fix reopen flag inheritance block: Add BlockDriverState.inherits_from block: Add list of children to BlockDriverState queue.h: Add QLIST_FIX_HEAD_PTR() block: Drain requests before swapping nodes in bdrv_swap() block: Move flag inheritance to bdrv_open_inherit() block: Use QemuOpts in bdrv_open_common() block: Use macro for cache option names vmdk: Use bdrv_open_image() quorum: Use bdrv_open_image() check-qdict: Test cases for new functions qdict: Add qdict_{set,copy}_default() qdict: Add qdict_array_entries() iotests: Add tests for overriding BDRV_O_PROTOCOL block: driver should override flags in bdrv_open() block: Change bitmap truncate conditional to assertion block: record new size in bdrv_dirty_bitmap_truncate raw-posix: Fix .bdrv_co_get_block_status() for unaligned image size vmdk: Use vmdk_find_index_in_cluster everywhere vmdk: Fix index_in_cluster calculation in vmdk_co_get_block_status ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-06-12block: Fix reopen flag inheritanceKevin Wolf
When reopening an image, the block layer already takes care to reopen bs->file as well with recalculated inherited flags. The same must happen for any other child (most notably missing before this patch: backing files). If bs->file (or any other child) didn't originally inherit from bs, e.g. because it was created separately and then only referenced, it must not inherit flags on reopen either, so check the inherited_from field before propagation the reopen down. VMDK already reopened its extents manually; this code can now be dropped. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-06-12block: Move flag inheritance to bdrv_open_inherit()Kevin Wolf
Instead of letting every caller of bdrv_open() determine the right flags for its child node manually and pass them to the function, pass the parent node and the role of the newly opened child (like backing file, protocol layer, etc.). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-06-12vmdk: Use bdrv_open_image()Kevin Wolf
Besides standardising on a single interface for opening child nodes, this patch allows the user to specify options to individual extent nodes. Overriding file names isn't possible with this yet, so it's of limited usefulness, but still a step forward. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com>
2015-06-12quorum: Use bdrv_open_image()Kevin Wolf
Besides standardising on a single interface for opening child nodes, this simplifies the .bdrv_open() implementation of the quorum block driver by using block layer functionality for handling BlockdevRefs. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com>
2015-06-12raw-posix: Fix .bdrv_co_get_block_status() for unaligned image sizeKevin Wolf
Image files with an unaligned image size have a final hole that starts at EOF, i.e. in the middle of a sector. Currently, *pnum == 0 is returned when checking the status of this sector. In qemu-img, this triggers an assertion failure. In order to fix this, one type for the sector that contains EOF must be found. Treating a hole as data is safe, so this patch rounds the calculated number of data sectors up, so that a partial sector at EOF is treated as a full data sector. This fixes https://bugzilla.redhat.com/show_bug.cgi?id=1229394 Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Cole Robinson <crobinso@redhat.com>
2015-06-12vmdk: Use vmdk_find_index_in_cluster everywhereFam Zheng
Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-06-12vmdk: Fix index_in_cluster calculation in vmdk_co_get_block_statusFam Zheng
It has the similar issue with b1649fae49a8. Since the calculation is repeated for a few times already, introduce a function so it can be reused. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-06-12qcow2: Add DEFAULT_L2_CACHE_CLUSTERSMax Reitz
If a relatively large cluster size is chosen, the default of 1 MB L2 cache is not really appropriate. In this case, unless overridden by the user, the default cache size should not be determined by its size in bytes but by the number of L2 tables (clusters) it is supposed to contain. Note that without this patch, MIN_L2_CACHE_SIZE will effectively take over the same role. However, providing space for just two L2 tables is not enough to be the default. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-06-12qcow2: Set MIN_L2_CACHE_SIZE to 2Max Reitz
The L2 cache must cover at least two L2 tables, because during COW two L2 tables are accessed simultaneously. Reported-by: Alexander Graf <agraf@suse.de> Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Tested-by: Alexander Graf <agraf@suse.de> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-06-12throttle: add the name of the ThrottleGroup to BlockDeviceInfoAlberto Garcia
Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 172df91f09c69c6f0440a697bbd1b3f95b077ee4.1433779731.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-12throttle: acquire the ThrottleGroup lock in bdrv_swap()Alberto Garcia
bdrv_swap() touches the fields of a BlockDriverState that are protected by the ThrottleGroup lock. Although those fields end up in their original place, they are temporarily swapped in the process, so there's a chance that an operation on a member of the same group happening on a different thread can try to use them. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: d92dc40d7c4f1fc5cda5cbbf4ffb7a4670b79d17.1433779731.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-12throttle: Add throttle group supportAlberto Garcia
The throttle group support use a cooperative round robin scheduling algorithm. The principles of the algorithm are simple: - Each BDS of the group is used as a token in a circular way. - The active BDS computes if a wait must be done and arms the right timer. - If a wait must be done the token timer will be armed so the token will become the next active BDS. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: f0082a86f3ac01c46170f7eafe2101a92e8fde39.1433779731.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-12throttle: Add throttle group infrastructureAlberto Garcia
Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 2fdb4de17210b733a13eb472c33cd08b45f8fd21.1433779731.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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