- 19 5月, 2020 8 次提交
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由 Max Reitz 提交于
After the series this patch belongs to, we want to have a common BdrvChildClass that encompasses all of child_file, child_format, and child_backing. Such a single class needs a single .inherit_options() implementation, and this patch introduces it. The next patch will show how the existing implementations can fall back to it just by passing appropriate BdrvChildRole and parent_is_format values. Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-Id: <20200513110544.176672-11-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
The other two .inherit_options implementations specify exactly for what case they are used in their name, so do it for this one as well. (The actual intention behind this patch is to follow it up with a generic bdrv_inherited_options() that works for all three cases.) Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-Id: <20200513110544.176672-10-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
We plan to unify the generic .inherit_options() functions. The resulting common function will need to decide whether to force-enable format probing, force-disable it, or leave it as-is. To make this decision, it will need to know whether the parent node is a format node or not (because we never want format probing if the parent is a format node already (except for the backing chain)). Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-Id: <20200513110544.176672-9-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
For now, all callers (effectively) pass 0 and no callee evaluates thie value. Later patches will change both. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-Id: <20200513110544.176672-8-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
For now, all callers pass 0 and no callee evaluates this value. Later patches will change both. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-Id: <20200513110544.176672-7-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
For now, it is always set to 0. Later patches in this series will ensure that all callers pass an appropriate combination of flags. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-Id: <20200513110544.176672-6-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
This structure nearly only contains parent callbacks for child state changes. It cannot really reflect a child's role, because different roles may overlap (as we will see when real roles are introduced), and because parents can have custom callbacks even when the child fulfills a standard role. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NAlberto Garcia <berto@igalia.com> Message-Id: <20200513110544.176672-4-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
Right now, all users of bdrv_make_empty() call the BlockDriver method directly. That is not only bad style, it is also wrong, unless the caller has a BdrvChild with a WRITE or WRITE_UNCHANGED permission. (WRITE_UNCHANGED suffices, because callers generally use this function to clear a node with a backing file after a commit operation.) Introduce bdrv_make_empty() that verifies that it does. Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-Id: <20200429141126.85159-2-mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 08 5月, 2020 1 次提交
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由 Eric Blake 提交于
Now that there are no clients of bdrv_has_zero_init_truncate, none of the drivers need to worry about providing it. What's more, this eliminates a source of some confusion: a literal reading of the documentation as written in ceaca56f and implemented in commit 1dcaf527 claims that a driver which returns 0 for bdrv_has_zero_init_truncate() must not return 1 for bdrv_has_zero_init(); this condition was violated for parallels, qcow, and sometimes for vdi, although in practice it did not matter since those drivers also lacked .bdrv_co_truncate. Signed-off-by: NEric Blake <eblake@redhat.com> Message-Id: <20200428202905.770727-10-eblake@redhat.com> Acked-by: NRichard W.M. Jones <rjones@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 04 5月, 2020 1 次提交
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由 Philippe Mathieu-Daudé 提交于
Fix warning reported by Clang static code analyzer: block.c:3167:5: warning: Value stored to 'ret' is never read ret = bdrv_fill_options(&options, filename, &flags, &local_err); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Fixes: 462f5bcf Reported-by: Clang Static Analyzer Suggested-by: NMarkus Armbruster <armbru@redhat.com> Reviewed-by: NAlistair Francis <alistair.francis@wdc.com> Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com> Message-Id: <20200422133152.16770-2-philmd@redhat.com> Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
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- 30 4月, 2020 2 次提交
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由 Kevin Wolf 提交于
Now that node level interface bdrv_truncate() supports passing request flags to the block driver, expose this on the BlockBackend level, too. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: NAlberto Garcia <berto@igalia.com> Reviewed-by: NMax Reitz <mreitz@redhat.com> Message-Id: <20200424125448.63318-4-kwolf@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Markus Armbruster 提交于
The previous few commits have made this more obvious, and removed the one exception. Time to clarify the documentation, and drop dead error checking. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-Id: <20200424084338.26803-13-armbru@redhat.com>
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- 27 3月, 2020 1 次提交
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bdrv_root_attach_child promises to drop child_bs reference on failure. It does it on first handled failure path, but not on the second. Fix that. Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200324155921.23822-1-vsementsov@virtuozzo.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 26 3月, 2020 2 次提交
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由 Maxim Levitsky 提交于
Instead of checking the .bdrv_co_create_opts to see if we need the fallback, just implement the .bdrv_co_create_opts in the drivers that need it. This way we don't break various places that need to know if the underlying protocol/format really supports image creation, and this way we still allow some drivers to not support image creation. Fixes: fd17146c Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1816007 Note that technically this driver reverts the image creation fallback for the vxhs driver since I don't have a means to test it, and IMHO it is better to leave it not supported as it was prior to generic image creation patches. Also drop iscsi_create_opts which was left accidentally. Signed-off-by: NMaxim Levitsky <mlevitsk@redhat.com> Message-Id: <20200326011218.29230-3-mlevitsk@redhat.com> Reviewed-by: NDenis V. Lunev <den@openvz.org> [mreitz: Fixed alignment, and moved bdrv_co_create_opts_simple() and bdrv_create_opts_simple from block.h into block_int.h] Signed-off-by: NMax Reitz <mreitz@redhat.com>
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由 Maxim Levitsky 提交于
This will allow the reuse of a single generic .bdrv_co_create implementation for several drivers. No functional changes. Signed-off-by: NMaxim Levitsky <mlevitsk@redhat.com> Message-Id: <20200326011218.29230-2-mlevitsk@redhat.com> Reviewed-by: NDenis V. Lunev <den@openvz.org> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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- 24 3月, 2020 2 次提交
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There is a use-after-free possible: bdrv_unref_child() leaves bs->backing freed but not NULL. bdrv_attach_child may produce nested polling loop due to drain, than access of freed pointer is possible. I've produced the following crash on 30 iotest with modified code. It does not reproduce on master, but still seems possible: #0 __strcmp_avx2 () at /lib64/libc.so.6 #1 bdrv_backing_overridden (bs=0x55c9d3cc2060) at block.c:6350 #2 bdrv_refresh_filename (bs=0x55c9d3cc2060) at block.c:6404 #3 bdrv_backing_attach (c=0x55c9d48e5520) at block.c:1063 #4 bdrv_replace_child_noperm (child=child@entry=0x55c9d48e5520, new_bs=new_bs@entry=0x55c9d3cc2060) at block.c:2290 #5 bdrv_replace_child (child=child@entry=0x55c9d48e5520, new_bs=new_bs@entry=0x55c9d3cc2060) at block.c:2320 #6 bdrv_root_attach_child (child_bs=child_bs@entry=0x55c9d3cc2060, child_name=child_name@entry=0x55c9d241d478 "backing", child_role=child_role@entry=0x55c9d26ecee0 <child_backing>, ctx=<optimized out>, perm=<optimized out>, shared_perm=21, opaque=0x55c9d3c5a3d0, errp=0x7ffd117108e0) at block.c:2424 #7 bdrv_attach_child (parent_bs=parent_bs@entry=0x55c9d3c5a3d0, child_bs=child_bs@entry=0x55c9d3cc2060, child_name=child_name@entry=0x55c9d241d478 "backing", child_role=child_role@entry=0x55c9d26ecee0 <child_backing>, errp=errp@entry=0x7ffd117108e0) at block.c:5876 #8 in bdrv_set_backing_hd (bs=bs@entry=0x55c9d3c5a3d0, backing_hd=backing_hd@entry=0x55c9d3cc2060, errp=errp@entry=0x7ffd117108e0) at block.c:2576 #9 stream_prepare (job=0x55c9d49d84a0) at block/stream.c:150 #10 job_prepare (job=0x55c9d49d84a0) at job.c:761 #11 job_txn_apply (txn=<optimized out>, fn=<optimized out>) at job.c:145 #12 job_do_finalize (job=0x55c9d49d84a0) at job.c:778 #13 job_completed_txn_success (job=0x55c9d49d84a0) at job.c:832 #14 job_completed (job=0x55c9d49d84a0) at job.c:845 #15 job_completed (job=0x55c9d49d84a0) at job.c:836 #16 job_exit (opaque=0x55c9d49d84a0) at job.c:864 #17 aio_bh_call (bh=0x55c9d471a160) at util/async.c:117 #18 aio_bh_poll (ctx=ctx@entry=0x55c9d3c46720) at util/async.c:117 #19 aio_poll (ctx=ctx@entry=0x55c9d3c46720, blocking=blocking@entry=true) at util/aio-posix.c:728 #20 bdrv_parent_drained_begin_single (poll=true, c=0x55c9d3d558f0) at block/io.c:121 #21 bdrv_parent_drained_begin_single (c=c@entry=0x55c9d3d558f0, poll=poll@entry=true) at block/io.c:114 #22 bdrv_replace_child_noperm (child=child@entry=0x55c9d3d558f0, new_bs=new_bs@entry=0x55c9d3d27300) at block.c:2258 #23 bdrv_replace_child (child=child@entry=0x55c9d3d558f0, new_bs=new_bs@entry=0x55c9d3d27300) at block.c:2320 #24 bdrv_root_attach_child (child_bs=child_bs@entry=0x55c9d3d27300, child_name=child_name@entry=0x55c9d241d478 "backing", child_role=child_role@entry=0x55c9d26ecee0 <child_backing>, ctx=<optimized out>, perm=<optimized out>, shared_perm=21, opaque=0x55c9d3cc2060, errp=0x7ffd11710c60) at block.c:2424 #25 bdrv_attach_child (parent_bs=parent_bs@entry=0x55c9d3cc2060, child_bs=child_bs@entry=0x55c9d3d27300, child_name=child_name@entry=0x55c9d241d478 "backing", child_role=child_role@entry=0x55c9d26ecee0 <child_backing>, errp=errp@entry=0x7ffd11710c60) at block.c:5876 #26 bdrv_set_backing_hd (bs=bs@entry=0x55c9d3cc2060, backing_hd=backing_hd@entry=0x55c9d3d27300, errp=errp@entry=0x7ffd11710c60) at block.c:2576 #27 stream_prepare (job=0x55c9d495ead0) at block/stream.c:150 ... Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200316060631.30052-2-vsementsov@virtuozzo.com> Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: NJohn Snow <jsnow@redhat.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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由 Philippe Mathieu-Daudé 提交于
bdrv_do_find_format() calls strcmp() using BlockDriver::format_name as argument, which must not be NULL. Assert this field is not null when we register a block driver in bdrv_register(). Reported-by: NMansour Ahmadi <ManSoSec@gmail.com> Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200318222235.23856-1-philmd@redhat.com> Reviewed-by: NAlberto Garcia <berto@igalia.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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- 11 3月, 2020 3 次提交
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由 Daniel Henrique Barboza 提交于
Using the new 'bdrv_co_delete_file' interface, a pure co_routine function 'bdrv_co_delete_file' inside block.c can can be used in a way similar of the existing bdrv_create_file to to clean up a created file. We're creating a pure co_routine because the only caller of 'bdrv_co_delete_file' will be already in co_routine context, thus there is no need to add all the machinery to check for qemu_in_coroutine() and create a separated co_routine to do the job. Suggested-by: NDaniel P. Berrangé <berrange@redhat.com> Signed-off-by: NDaniel Henrique Barboza <danielhb413@gmail.com> Message-Id: <20200130213907.2830642-3-danielhb413@gmail.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Kevin Wolf 提交于
external_snapshot_prepare() tries to move the overlay to the AioContext of the backing file (the snapshotted node). However, it's possible that this doesn't work, but the backing file can instead be moved to the overlay's AioContext (e.g. opening the backing chain for a mirror target). bdrv_append() already indirectly uses bdrv_attach_node(), which takes care to move nodes to make sure they use the same AioContext and which tries both directions. So the problem has a simple fix: Just delete the unnecessary extra bdrv_try_set_aio_context() call in external_snapshot_prepare() and instead assert in bdrv_append() that both nodes were indeed moved to the same AioContext. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Message-Id: <20200310113831.27293-6-kwolf@redhat.com> Tested-by: NPeter Krempa <pkrempa@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Kevin Wolf 提交于
Signed-off-by: NKevin Wolf <kwolf@redhat.com> Message-Id: <20200310113831.27293-2-kwolf@redhat.com> Reviewed-by: NPeter Krempa <pkrempa@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 07 3月, 2020 3 次提交
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由 Kevin Wolf 提交于
This patch allows bdrv_reopen() (and therefore the x-blockdev-reopen QMP command) to attach a node as the new backing file even if the node is in a different AioContext than the parent if one of both nodes can be moved to the AioContext of the other node. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Tested-by: NPeter Krempa <pkrempa@redhat.com> Message-Id: <20200306141413.30705-3-kwolf@redhat.com> Reviewed-by: NAlberto Garcia <berto@igalia.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Peter Krempa 提交于
Add another step in the reopen process where driver can execute code after permission changes are comitted. Signed-off-by: NPeter Krempa <pkrempa@redhat.com> Message-Id: <adc02cf591c3cb34e98e33518eb1c540a0f27db1.1582893284.git.pkrempa@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
@options is leaked by the first two return statements in this function. Note that blk_new_open() takes the reference to @options even on failure, so all we need to do to fix the leak is to move the QDict allocation down to where we actually need it. Reported-by: Coverity (CID 1419884) Fixes: fd17146c ("block: Generic file creation fallback") Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-Id: <20200225155618.133412-1-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 22 2月, 2020 1 次提交
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由 Stefan Hajnoczi 提交于
QLIST_REMOVE() assumes the element is in a list. It also leaves the element's linked list pointers dangling. Introduce a safe version of QLIST_REMOVE() and convert open-coded instances of this pattern. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NSergio Lopez <slp@redhat.com> Message-id: 20200214171712.541358-4-stefanha@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 20 2月, 2020 2 次提交
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由 Max Reitz 提交于
If a protocol driver does not support image creation, we can see whether maybe the file exists already. If so, just truncating it will be sufficient. Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-Id: <20200122164532.178040-3-mreitz@redhat.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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由 Peter Krempa 提交于
When a management application manages node names there's no reason to recurse into backing images in the output of query-named-block-nodes. Add a parameter to the command which will return just the top level structs. Signed-off-by: NPeter Krempa <pkrempa@redhat.com> Message-Id: <4470f8c779abc404dcf65e375db195cd91a80651.1579509782.git.pkrempa@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> [mreitz: Fixed coding style] Signed-off-by: NMax Reitz <mreitz@redhat.com>
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- 18 2月, 2020 5 次提交
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由 Max Reitz 提交于
It no longer has any users. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200218103454.296704-11-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
Let check_to_replace_node() use the more specialized bdrv_recurse_can_replace() instead of bdrv_recurse_is_first_non_filter(), which is too restrictive (or, in the case of quorum, sometimes not restrictive enough). Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200218103454.296704-10-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
After a couple of follow-up patches, this function will replace bdrv_recurse_is_first_non_filter() in check_to_replace_node(). bdrv_recurse_is_first_non_filter() is both not sufficiently specific for check_to_replace_node() (it allows cases that should not be allowed, like replacing child nodes of quorum with dissenting data that have more parents than just quorum), and it is too restrictive (it is perfectly fine to replace filters). Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200218103454.296704-7-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Max Reitz 提交于
It is unused now. (And it was ugly because it needed to explore all BDS chains from the top.) Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200218103454.296704-4-mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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由 Philippe Mathieu-Daudé 提交于
Fixes: 132ada80Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200218094402.26625-4-philmd@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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- 06 2月, 2020 2 次提交
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由 Pan Nengyuan 提交于
If we call the qmp 'query-block' while qemu is working on 'block-commit', it will cause memleaks, the memory leak stack is as follow: Indirect leak of 12360 byte(s) in 3 object(s) allocated from: #0 0x7f80f0b6d970 in __interceptor_calloc (/lib64/libasan.so.5+0xef970) #1 0x7f80ee86049d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5249d) #2 0x55ea95b5bb67 in qdict_new /mnt/sdb/qemu-4.2.0-rc0/qobject/qdict.c:29 #3 0x55ea956cd043 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6427 #4 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6399 #5 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6399 #6 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6399 #7 0x55ea958818ea in bdrv_block_device_info /mnt/sdb/qemu-4.2.0-rc0/block/qapi.c:56 #8 0x55ea958879de in bdrv_query_info /mnt/sdb/qemu-4.2.0-rc0/block/qapi.c:392 #9 0x55ea9588b58f in qmp_query_block /mnt/sdb/qemu-4.2.0-rc0/block/qapi.c:578 #10 0x55ea95567392 in qmp_marshal_query_block qapi/qapi-commands-block-core.c:95 Indirect leak of 4120 byte(s) in 1 object(s) allocated from: #0 0x7f80f0b6d970 in __interceptor_calloc (/lib64/libasan.so.5+0xef970) #1 0x7f80ee86049d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5249d) #2 0x55ea95b5bb67 in qdict_new /mnt/sdb/qemu-4.2.0-rc0/qobject/qdict.c:29 #3 0x55ea956cd043 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6427 #4 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6399 #5 0x55ea956cc950 in bdrv_refresh_filename /mnt/sdb/qemu-4.2.0-rc0/block.c:6399 #6 0x55ea9569f301 in bdrv_backing_attach /mnt/sdb/qemu-4.2.0-rc0/block.c:1064 #7 0x55ea956a99dd in bdrv_replace_child_noperm /mnt/sdb/qemu-4.2.0-rc0/block.c:2283 #8 0x55ea956b9b53 in bdrv_replace_node /mnt/sdb/qemu-4.2.0-rc0/block.c:4196 #9 0x55ea956b9e49 in bdrv_append /mnt/sdb/qemu-4.2.0-rc0/block.c:4236 #10 0x55ea958c3472 in commit_start /mnt/sdb/qemu-4.2.0-rc0/block/commit.c:306 #11 0x55ea94b68ab0 in qmp_block_commit /mnt/sdb/qemu-4.2.0-rc0/blockdev.c:3459 #12 0x55ea9556a7a7 in qmp_marshal_block_commit qapi/qapi-commands-block-core.c:407 Fixes: bb808d5fReported-by: NEuler Robot <euler.robot@huawei.com> Signed-off-by: NPan Nengyuan <pannengyuan@huawei.com> Message-id: 20200116085600.24056-1-pannengyuan@huawei.com Signed-off-by: NMax Reitz <mreitz@redhat.com>
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由 Alberto Garcia 提交于
This is a bit more efficient than having to allocate and free memory for each new permission. The default size (30) is enough for "consistent read, write, resize". Signed-off-by: NAlberto Garcia <berto@igalia.com> Message-id: 20200110171518.22168-1-berto@igalia.com Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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- 31 1月, 2020 1 次提交
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由 Aarushi Mehta 提交于
Signed-off-by: NAarushi Mehta <mehta.aaru20@gmail.com> Acked-by: NStefano Garzarella <sgarzare@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Message-id: 20200120141858.587874-8-stefanha@redhat.com Message-Id: <20200120141858.587874-8-stefanha@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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- 06 1月, 2020 2 次提交
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由 Max Reitz 提交于
We can save some LoC in xdbg_graph_add_edge() by using bdrv_qapi_perm_to_blk_perm(). Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-id: 20191108123455.39445-3-mreitz@redhat.com Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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由 Max Reitz 提交于
We need some way to correlate QAPI BlockPermission values with BLK_PERM_* flags. We could: (1) have the same order in the QAPI definition as the the BLK_PERM_* flags are in LSb-first order. However, then there is no guarantee that they actually match (e.g. when someone modifies the QAPI schema without thinking of the BLK_PERM_* definitions). We could add static assertions, but these would break what’s good about this solution, namely its simplicity. (2) define the BLK_PERM_* flags based on the BlockPermission values. But this way whenever someone were to modify the QAPI order (perfectly sensible in theory), the BLK_PERM_* values would change. Because these values are used for file locking, this might break file locking between different qemu versions. Therefore, go the slightly more cumbersome way: Add a function to translate from the QAPI constants to the BLK_PERM_* flags. Signed-off-by: NMax Reitz <mreitz@redhat.com> Message-id: 20191108123455.39445-2-mreitz@redhat.com Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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- 20 12月, 2019 1 次提交
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由 Kevin Wolf 提交于
bdrv_invalidate_cache_all() assumes that all nodes in a given subtree are either active or inactive when it starts. Therefore, as soon as it arrives at an already active node, it stops. However, this assumption is wrong. For example, it's possible to take a snapshot of an inactive node, which results in an active overlay over an inactive backing file. The active overlay is probably also the root node of an inactive BlockBackend (blk->disable_perm == true). In this case, bdrv_invalidate_cache_all() does not need to do anything to activate the overlay node, but it still needs to recurse into the children and the parents to make sure that after returning success, really everything is activated. Cc: qemu-stable@nongnu.org Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com>
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- 18 12月, 2019 1 次提交
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由 Kevin Wolf 提交于
If both the create options (qemu-img create -o ...) and the size parameter were given, the size parameter was silently ignored. Instead, make specifying two sizes an error. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com>
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- 19 11月, 2019 1 次提交
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由 Kevin Wolf 提交于
bs->options and bs->explicit_options shouldn't contain any options for child nodes. bdrv_open_inherited() takes care to remove any options that match a child name after opening the image and the same is done when reopening. However, we miss the case of 'backing': null, which is a child option, but results in no child being created. This means that a 'backing': null remains in bs->options and bs->explicit_options. A typical use for 'backing': null is in live snapshots: blockdev-add for the qcow2 overlay makes sure not to open the backing file (because it is already opened and blockdev-snapshot will attach it). After doing a blockdev-snapshot, bs->options and bs->explicit_options become inconsistent with the actual state (bs has a backing file now, but the options still say null). On the next occasion that the image is reopened, e.g. switching it from read-write to read-only when another snapshot is taken, the option will take effect again and the node incorrectly loses its backing file. Fix bdrv_open_inherited() to remove the 'backing' option from bs->options and bs->explicit_options even for the case where it specifies that no backing file is wanted. Reported-by: NPeter Krempa <pkrempa@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NAlberto Garcia <berto@igalia.com> Tested-by: NPeter Krempa <pkrempa@redhat.com>
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- 26 10月, 2019 1 次提交
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由 Wei Yang 提交于
There are three page size in qemu: real host page size host page size target page size All of them have dedicate variable to represent. For the last two, we use the same form in the whole qemu project, while for the first one we use two forms: qemu_real_host_page_size and getpagesize(). qemu_real_host_page_size is defined to be a replacement of getpagesize(), so let it serve the role. [Note] Not fully tested for some arch or device. Signed-off-by: NWei Yang <richardw.yang@linux.intel.com> Message-Id: <20191013021145.16011-3-richardw.yang@linux.intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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