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2021-02-12block: use return status of bdrv_append()Vladimir Sementsov-Ogievskiy
Now bdrv_append returns status and we can drop all the local_err things around it. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-3-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
2020-10-30block: Return depth level during bdrv_is_allocated_aboveEric Blake
When checking for allocation across a chain, it's already easy to count the depth within the chain at which the allocation is found. Instead of throwing that information away, return it to the caller. Existing callers only cared about allocated/non-allocated, but having a depth available will be used by NBD in the next patch. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20201027050556.269064-9-eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> [eblake: rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
2020-09-07block: Inline bdrv_co_block_status_from_*()Max Reitz
With bdrv_filter_bs(), we can easily handle this default filter behavior in bdrv_co_block_status(). blkdebug wants to have an additional assertion, so it keeps its own implementation, except bdrv_co_block_status_from_file() needs to be inlined there. Suggested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2020-09-07commit: Deal with filtersMax Reitz
This includes some permission limiting (for example, we only need to take the RESIZE permission if the base is smaller than the top). Signed-off-by: Max Reitz <mreitz@redhat.com>
2020-05-18block: Drop @child_class from bdrv_child_perm()Max Reitz
Implementations should decide the necessary permissions based on @role. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200513110544.176672-35-mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18block: Pass BdrvChildRole to bdrv_child_perm()Max Reitz
For now, all callers pass 0 and no callee evaluates this value. Later patches will change both. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200513110544.176672-7-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18block: Rename BdrvChildRole to BdrvChildClassMax Reitz
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: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20200513110544.176672-4-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18block: Mark commit, mirror, blkreplay as filtersMax Reitz
The commit, mirror, and blkreplay block nodes are filters, so they should be marked as such. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200513110544.176672-2-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18block: Use blk_make_empty() after commitsMax Reitz
bdrv_commit() already has a BlockBackend pointing to the BDS that we want to empty, it just has the wrong permissions. qemu-img commit has no BlockBackend pointing to the old backing file yet, but introducing one is simple. After this commit, bdrv_make_empty() is the only remaining caller of BlockDriver.bdrv_make_empty(). Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200429141126.85159-5-mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> [kwolf: Fixed up reference output for 098] Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-04-30block-backend: Add flags to blk_truncate()Kevin Wolf
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: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200424125448.63318-4-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-02-18commit: Fix is_read for block_job_error_action()Kevin Wolf
block_job_error_action() needs to know if reading from the top node or writing to the base node failed so that it can set the right 'operation' in the BLOCK_JOB_ERROR QMP event. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200214200812.28180-6-kwolf@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-02-18commit: Inline commit_populate()Kevin Wolf
commit_populate() is a very short function and only called in a single place. Its return value doesn't tell us whether an error happened while reading or writing, which would be necessary for sending the right data in the BLOCK_JOB_ERROR QMP event. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200214200812.28180-5-kwolf@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-02-18commit: Fix argument order for block_job_error_action()Kevin Wolf
The block_job_error_action() error call in the commit job gives the on_err and is_read arguments in the wrong order. Fix this. (Of course, hard-coded is_read = false is wrong, too, but that's a separate problem for a separate patch.) Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200214200812.28180-4-kwolf@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-02-18commit: Remove unused bytes_writtenKevin Wolf
The bytes_written variable is only ever written to, it serves no purpose. This has actually been the case since the commit job was first introduced in commit 747ff602636. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200214200812.28180-3-kwolf@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-10-28block: Add @exact parameter to bdrv_co_truncate()Max Reitz
We have two drivers (iscsi and file-posix) that (in some cases) return success from their .bdrv_co_truncate() implementation if the block device is larger than the requested offset, but cannot be shrunk. Some callers do not want that behavior, so this patch adds a new parameter that they can use to turn off that behavior. This patch just adds the parameter and lets the block/io.c and block/block-backend.c functions pass it around. All other callers always pass false and none of the implementations evaluate it, so that this patch does not change existing behavior. Future patches take care of that. Suggested-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20190918095144.955-5-mreitz@redhat.com Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-09-10job: drop job_drainVladimir Sementsov-Ogievskiy
In job_finish_sync job_enter should be enough for a job to make some progress and draining is a wrong tool for it. So use job_enter directly here and drop job_drain with all related staff not used more. Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Tested-by: John Snow <jsnow@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-08-16block-backend: Queue requests while drainedKevin Wolf
This fixes devices like IDE that can still start new requests from I/O handlers in the CPU thread while the block backend is drained. The basic assumption is that in a drain section, no new requests should be allowed through a BlockBackend (blk_drained_begin/end don't exist, we get drain sections only on the node level). However, there are two special cases where requests should not be queued: 1. Block jobs: We already make sure that block jobs are paused in a drain section, so they won't start new requests. However, if the drain_begin is called on the job's BlockBackend first, it can happen that we deadlock because the job stays busy until it reaches a pause point - which it can't if its requests aren't processed any more. The proper solution here would be to make all requests through the job's filter node instead of using a BlockBackend. For now, just disabling request queuing on the job BlockBackend is simpler. 2. In test cases where making requests through bdrv_* would be cumbersome because we'd need a BdrvChild. As we already got the functionality to disable request queuing from 1., use it in tests, too, for convenience. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-07-15block: Add BDS.never_freezeMax Reitz
The commit and the mirror block job must be able to drop their filter node at any point. However, this will not be possible if any of the BdrvChild links to them is frozen. Therefore, we need to prevent them from ever becoming frozen. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-id: 20190703172813.6868-2-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-07-02block: include base when checking image chain for block allocationAndrey Shinkevich
This patch is used in the 'block/stream: introduce a bottom node' that is following. Instead of the base node, the caller may pass the node that has the base as its backing image to the function bdrv_is_allocated_above() with a new parameter include_base = true and get rid of the dependency on the base that may change during commit/stream parallel jobs. Now, if the specified base is not found in the backing image chain, the QEMU will abort. Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-id: 1559152576-281803-2-git-send-email-andrey.shinkevich@virtuozzo.com [mreitz: Squashed in the following as a rebase on conflicting patches:] Message-id: e3cf99ae-62e9-8b6e-5a06-d3c8b9363b85@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-06-18block/commit: Drop bdrv_child_try_set_perm()Max Reitz
commit_top_bs never requests or unshares any permissions. There is no reason to make this so explicit here. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-06-04block: Remove wrong bdrv_set_aio_context() callsKevin Wolf
The mirror and commit block jobs use bdrv_set_aio_context() to move their filter node into the right AioContext before hooking it up in the graph. Similarly, bdrv_open_backing_file() explicitly moves the backing file node into the right AioContext first. This isn't necessary any more, they get automatically moved into the right context now when attaching them. However, in the case of bdrv_open_backing_file() with a node reference, it's actually not only unnecessary, but even wrong: The unchecked bdrv_set_aio_context() changes the AioContext of the child node even if other parents require it to retain the old context. So this is not only a simplification, but a bug fix, too. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1684342 Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-06-04block: Add BlockBackend.ctxKevin Wolf
This adds a new parameter to blk_new() which requires its callers to declare from which AioContext this BlockBackend is going to be used (or the locks of which AioContext need to be taken anyway). The given context is only stored and kept up to date when changing AioContexts. Actually applying the stored AioContext to the root node is saved for another commit. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-05-07commit: Use bdrv_append() in commit_start()Alberto Garcia
This function combines bdrv_set_backing_hd() and bdrv_replace_node() so we can use it to simplify the code a bit in commit_start(). Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 20190403143748.9790-1-berto@igalia.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-04-30commit: Make base read-only if there is an early failureAlberto Garcia
You can reproduce this by passing an invalid filter-node-name (like "1234") to block-commit. In this case the base image is put in read-write mode but is never reset back to read-only. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-04-30block/commit: use buffer-based ioVladimir Sementsov-Ogievskiy
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-03-12block: Freeze the backing chain for the duration of the commit jobAlberto Garcia
Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-02-26Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell
Block layer patches: - Block graph change fixes (avoid loops, cope with non-tree graphs) - bdrv_set_aio_context() related fixes - HMP snapshot commands: Use only tag, not the ID to identify snapshots - qmeu-img, commit: Error path fixes - block/nvme: Build fix for gcc 9 - MAINTAINERS updates - Fix various issues with bdrv_refresh_filename() - Fix various iotests - Include LUKS overhead in qemu-img measure for qcow2 - A fix for vmdk's image creation interface # gpg: Signature made Mon 25 Feb 2019 14:18:15 GMT # gpg: using RSA key 7F09B272C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full] # Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6 * remotes/kevin/tags/for-upstream: (71 commits) iotests: Skip 211 on insufficient memory vmdk: false positive of compat6 with hwversion not set iotests: add LUKS payload overhead to 178 qemu-img measure test qcow2: include LUKS payload overhead in qemu-img measure iotests.py: s/_/-/g on keys in qmp_log() iotests: Let 045 be run concurrently iotests: Filter SSH paths iotests.py: Filter filename in any string value iotests.py: Add is_str() iotests: Fix 207 to use QMP filters for qmp_log iotests: Fix 232 for LUKS iotests: Remove superfluous rm from 232 iotests: Fix 237 for Python 2.x iotests: Re-add filename filters iotests: Test json:{} filenames of internal BDSs block: BDS options may lack the "driver" option block/null: Generate filename even with latency-ns block/curl: Implement bdrv_refresh_filename() block/curl: Harmonize option defaults block/nvme: Fix bdrv_refresh_filename() ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-02-25block: Purify .bdrv_refresh_filename()Max Reitz
Currently, BlockDriver.bdrv_refresh_filename() is supposed to both refresh the filename (BDS.exact_filename) and set BDS.full_open_options. Now that we have generic code in the central bdrv_refresh_filename() for creating BDS.full_open_options, we can drop the latter part from all BlockDriver.bdrv_refresh_filename() implementations. This also means that we can drop all of the existing default code for this from the global bdrv_refresh_filename() itself. Furthermore, we now have to call BlockDriver.bdrv_refresh_filename() after having set BDS.full_open_options, because the block driver's implementation should now be allowed to depend on BDS.full_open_options being set correctly. Finally, with this patch we can drop the @options parameter from BlockDriver.bdrv_refresh_filename(); also, add a comment on this function's purpose in block/block_int.h while touching its interface. This completely obsoletes blklogwrite's implementation of .bdrv_refresh_filename(). Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20190201192935.18394-25-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-02-25block: Use children list in bdrv_refresh_filenameMax Reitz
bdrv_refresh_filename() should invoke itself recursively on all children, not just on file. With that change, we can remove the manual invocations in blkverify, quorum, commit, mirror, and blklogwrites. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-id: 20190201192935.18394-3-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-02-25commit: Replace commit_top_bs on failure after deleting the block jobAlberto Garcia
If there's an error in commit_start() then the block job must be deleted before replacing commit_top_bs, otherwise it will fail because of lack of permissions. This happens since the permission system was introduced in 8dfba2797761d8a43744e4e6571c8175e448a478. Fortunately this bug doesn't seem to be possible to reproduce at the moment without changing the code. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-02-22block/commit: use QEMU_IOVEC_INIT_BUFVladimir Sementsov-Ogievskiy
Use new QEMU_IOVEC_INIT_BUF() instead of qemu_iovec_init_external( ... , 1), which simplifies the code. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20190218140926.333779-6-vsementsov@virtuozzo.com Message-Id: <20190218140926.333779-6-vsementsov@virtuozzo.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-12-14block: Use bdrv_reopen_set_read_only() in bdrv_commit()Alberto Garcia
This patch replaces the bdrv_reopen() calls that set and remove the BDRV_O_RDWR flag with the new bdrv_reopen_set_read_only() function. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-12-14block: Use bdrv_reopen_set_read_only() in commit_start/complete()Alberto Garcia
This patch replaces the bdrv_reopen() calls that set and remove the BDRV_O_RDWR flag with the new bdrv_reopen_set_read_only() function. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-09-25block/commit: refactor commit to use job callbacksJohn Snow
Use the component callbacks; prepare, abort, and clean. NB: prepare is only called when the job has not yet failed; and abort can be called after prepare. complete -> prepare -> abort -> clean complete -> abort -> clean During refactor, a potential problem with bdrv_drop_intermediate was identified, the patched behavior is no worse than the pre-patch behavior, so leave a FIXME for now to be fixed in a future patch. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20180906130225.5118-5-jsnow@redhat.com Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-09-25block/commit: add block job creation flagsJohn Snow
Add support for taking and passing forward job creation flags. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Message-id: 20180906130225.5118-2-jsnow@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-08-31block/commit: utilize job_exit shimJohn Snow
Change the manual deferment to commit_complete into the implicit callback to job_exit, renaming commit_complete to commit_exit. This conversion does change the timing of when job_completed is called to after the bdrv_replace_node and bdrv_unref calls, which could have implications for bjob->blk which will now be put down after this cleanup. Kevin highlights that we did not take any permissions for that backend at job creation time, so it is safe to reorder these operations. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20180830015734.19765-5-jsnow@redhat.com Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-08-31jobs: canonize Error objectJohn Snow
Jobs presently use both an Error object in the case of the create job, and char strings in the case of generic errors elsewhere. Unify the two paths as just j->err, and remove the extra argument from job_completed. The integer error code for job_completed is kept for now, to be removed shortly in a separate patch. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 20180830015734.19765-3-jsnow@redhat.com [mreitz: Dropped a superfluous g_strdup()] Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-08-31jobs: change start callback to run callbackJohn Snow
Presently we codify the entry point for a job as the "start" callback, but a more apt name would be "run" to clarify the idea that when this function returns we consider the job to have "finished," except for any cleanup which occurs in separate callbacks later. As part of this clarification, change the signature to include an error object and a return code. The error ptr is not yet used, and the return code while captured, will be overwritten by actions in the job_completed function. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20180830015734.19765-2-jsnow@redhat.com Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-08-15block: drop empty .bdrv_close handlersVladimir Sementsov-Ogievskiy
.bdrv_close handler is optional after previous commit, no needs to keep empty functions more. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-05-30job: Add error message for failing jobsKevin Wolf
So far we relied on job->ret and strerror() to produce an error message for failed jobs. Not surprisingly, this tends to result in completely useless messages. This adds a Job.error field that can contain an error string for a failing job, and a parameter to job_completed() that sets the field. As a default, if NULL is passed, we continue to use strerror(job->ret). All existing callers are changed to pass NULL. They can be improved in separate patches. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com>
2018-05-23job: Move progress fields to JobKevin Wolf
BlockJob has fields .offset and .len, which are actually misnomers today because they are no longer tied to block device sizes, but just progress counters. As such they make a lot of sense in generic Jobs. This patch moves the fields to Job and renames them to .progress_current and .progress_total to describe their function better. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-05-23job: Move completion and cancellation to JobKevin Wolf
This moves the top-level job completion and cancellation functions from BlockJob to Job. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-05-23job: Move job_finish_sync() to JobKevin Wolf
block_job_finish_sync() doesn't contain anything block job specific any more, so it can be moved to Job. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-05-23job: Add job_drain()Kevin Wolf
block_job_drain() contains a blk_drain() call which cannot be moved to Job, so add a new JobDriver callback JobDriver.drain which has a common implementation for all BlockJobs. In addition to this we keep the existing BlockJobDriver.drain callback that is called by the common drain implementation for all block jobs. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-05-23job: Move single job finalisation to JobKevin Wolf
This moves the finalisation of a single job from BlockJob to Job. Some part of this code depends on job transactions, and job transactions call this code, we introduce some temporary calls from Job functions to BlockJob ones. This will be fixed once transactions move to Job, too. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-05-23job: Move BlockJobCreateFlags to JobKevin Wolf
This renames the BlockJobCreateFlags constants, moves a few JOB_INTERNAL checks to job_create() and the auto_{finalize,dismiss} fields from BlockJob to Job. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-05-23job: Move pause/resume functions to JobKevin Wolf
While we already moved the state related to job pausing to Job, the functions to do were still BlockJob only. This commit moves them over to Job. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
2018-05-23job: Add job_sleep_ns()Kevin Wolf
There is nothing block layer specific about block_job_sleep_ns(), so move the function to Job. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2018-05-23job: Move coroutine and related code to JobKevin Wolf
This commit moves some core functions for dealing with the job coroutine from BlockJob to Job. This includes primarily entering the coroutine (both for the first and reentering) and yielding explicitly and at pause points. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
2018-05-23job: Move defer_to_main_loop to JobKevin Wolf
Move the defer_to_main_loop functionality from BlockJob to Job. The code can be simplified because we can use job->aio_context in job_defer_to_main_loop_bh() now, instead of having to access the BlockDriverState. Probably taking the data->aio_context lock in addition was already unnecessary in the old code because we didn't actually make use of anything protected by the old AioContext except getting the new AioContext, in case it changed between scheduling the BH and running it. But it's certainly unnecessary now that the BDS isn't accessed at all any more. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
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