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c1019d1687
Move the permission API calls into driver-specific callbacks that always run under BQL. In this case, bdrv_crypto_luks needs to perform permission checks before and after qcrypto_block_amend_options(). The problem is that the caller, block_crypto_amend_options_generic_luks(), can also run in I/O from .bdrv_co_amend(). This does not comply with Global State-I/O API split, as permissions API must always run under BQL. Firstly, introduce .bdrv_amend_pre_run() and .bdrv_amend_clean() callbacks. These two callbacks are guaranteed to be invoked under BQL, respectively before and after .bdrv_co_amend(). They take care of performing the permission checks in the same way as they are currently done before and after qcrypto_block_amend_options(). These callbacks are in preparation for next patch, where we delete the original permission check. Right now they just add redundant control. Then, call .bdrv_amend_pre_run() before job_start in qmp_x_blockdev_amend(), so that it will be run before the job coroutine is created and stay in the main loop. As a cleanup, use JobDriver's .clean() callback to call .bdrv_amend_clean(), and run amend-specific cleanup callbacks under BQL. After this patch, permission failures occur early in the blockdev-amend job to update a LUKS volume's keys. iotest 296 must now expect them in x-blockdev-amend's QMP reply instead of waiting for the actual job to fail later. Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Message-Id: <20220209105452.1694545-2-eesposit@redhat.com> Signed-off-by: Hanna Reitz <hreitz@redhat.com> Message-Id: <20220304153729.711387-6-hreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
31 lines
1 KiB
Plaintext
31 lines
1 KiB
Plaintext
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "Failed to get shared \"consistent read\" lock"}}
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{"error": {"class": "GenericError", "desc": "Failed to get shared \"consistent read\" lock"}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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qemu-img: Failed to get shared "consistent read" lock
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Is another process using the image [TEST_DIR/test.img]?
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.
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{"error": {"class": "GenericError", "desc": "Block node is read-only"}}
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{"error": {"class": "GenericError", "desc": "Failed to get shared \"consistent read\" lock"}}
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{"error": {"class": "GenericError", "desc": "Failed to get shared \"consistent read\" lock"}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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.
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{"return": {}}
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{"error": {"class": "GenericError", "desc": "Failed to get \"write\" lock"}}
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.
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{"return": {}}
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{"return": {}}
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.
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----------------------------------------------------------------------
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Ran 4 tests
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OK
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