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It's unused now (except for permission handling)[*]. The only reasonable user of it was block-stream job, recently updated to use own blk. And other block jobs prefer to use own source node related objects. So, the arguments of dropping the field are: - block jobs prefer not to use it - block jobs usually has more then one node to operate on, and better to operate symmetrically (for example has both source and target blk's in specific block-job state structure) *: BlockJob.blk is used to keep some permissions. We simply move permissions to block-job child created in block_job_create() together with blk. In mirror, we just should not care anymore about restoring state of blk. Most probably this code could be dropped long ago, after dropping bs->job pointer. Now it finally goes away together with BlockJob.blk itself. iotest 141 output is updated, as "bdrv_has_blk(bs)" check in qmp_blockdev_del() doesn't fail (we don't have blk now). Still, new error message looks even better. In iotest 283 we need to add a job id, otherwise "Invalid job ID" happens now earlier than permission check (as permissions moved from blk to block-job node). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Nikita Lapshin <nikita.lapshin@virtuozzo.com>
24 lines
1.6 KiB
Plaintext
24 lines
1.6 KiB
Plaintext
{"execute": "blockdev-add", "arguments": {"driver": "null-co", "node-name": "target", "size": 1048576}}
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{"return": {}}
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{"execute": "blockdev-add", "arguments": {"driver": "blkdebug", "image": {"driver": "null-co", "node-name": "base", "size": 1048576}, "node-name": "source"}}
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{"return": {}}
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{"execute": "blockdev-add", "arguments": {"driver": "blkdebug", "image": "base", "node-name": "other", "take-child-perms": ["write"]}}
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{"return": {}}
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{"execute": "blockdev-backup", "arguments": {"device": "source", "job-id": "backup0", "sync": "full", "target": "target"}}
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{"error": {"class": "GenericError", "desc": "Permission conflict on node 'base': permissions 'write' are both required by node 'other' (uses node 'base' as 'image' child) and unshared by node 'source' (uses node 'base' as 'image' child)."}}
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=== copy-before-write filter should be gone after job-finalize ===
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{"execute": "blockdev-add", "arguments": {"driver": "null-co", "node-name": "source"}}
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{"return": {}}
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{"execute": "blockdev-add", "arguments": {"driver": "null-co", "node-name": "target"}}
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{"return": {}}
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{"execute": "blockdev-backup", "arguments": {"auto-dismiss": false, "auto-finalize": false, "device": "source", "filter-node-name": "backup-filter", "job-id": "backup", "sync": "full", "target": "target"}}
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{"return": {}}
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{"execute": "job-finalize", "arguments": {"id": "backup"}}
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{"return": {}}
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{"execute": "human-monitor-command", "arguments": {"command-line": "qemu-io backup-filter \"write 0 1M\""}}
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{"return": "Error: Cannot find device='' nor node-name='backup-filter'\r\n"}
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{"execute": "job-dismiss", "arguments": {"id": "backup"}}
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{"return": {}}
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