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qemu/tests/qemu-iotests/161.out

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block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
QA output created by 161
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=1048576
iotests: Specify explicit backing format where sensible There are many existing qcow2 images that specify a backing file but no format. This has been the source of CVEs in the past, but has become more prominent of a problem now that libvirt has switched to -blockdev. With older -drive, at least the probing was always done by qemu (so the only risk of a changed format between successive boots of a guest was if qemu was upgraded and probed differently). But with newer -blockdev, libvirt must specify a format; if libvirt guesses raw where the image was formatted, this results in data corruption visible to the guest; conversely, if libvirt guesses qcow2 where qemu was using raw, this can result in potential security holes, so modern libvirt instead refuses to use images without explicit backing format. The change in libvirt to reject images without explicit backing format has pointed out that a number of tools have been far too reliant on probing in the past. It's time to set a better example in our own iotests of properly setting this parameter. iotest calls to create, rebase, and convert are all impacted to some degree. It's a bit annoying that we are inconsistent on command line - while all of those accept -o backing_file=...,backing_fmt=..., the shortcuts are different: create and rebase have -b and -F, while convert has -B but no -F. (amend has no shortcuts, but the previous patch just deprecated the use of amend to change backing chains). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-9-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-07-06 23:39:52 +03:00
Formatting 'TEST_DIR/t.IMGFMT.int', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT.int backing_fmt=IMGFMT
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
*** Change an option on the backing file
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'qmp_capabilities' }
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
{"return": {}}
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.detect-zeroes=on"' } }
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
{"return": ""}
*** Stream and then change an option on the backing file
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'qmp_capabilities' }
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
{"return": {}}
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'block-stream', 'arguments': { 'device': 'none0', 'base': 'TEST_DIR/t.IMGFMT.base' } }
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "none0"}}
{"return": {}}
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.detect-zeroes=on"' } }
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "none0", "len": 1048576, "offset": 1048576, "speed": 0, "type": "stream"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "none0"}}
{"return": ""}
block: Update BlockDriverState.inherits_from on bdrv_drop_intermediate() The previous patch fixed the inherits_from pointer after block-stream, and this one does the same for block-commit. When block-commit finishes and the 'top' node is not the topmost one from the backing chain then all nodes above 'base' up to and including 'top' are removed from the chain. The bdrv_drop_intermediate() call converts a chain like this one: base <- intermediate <- top <- active into this one: base <- active In a simple scenario each backing file from the first chain has the inherits_from attribute pointing to its parent. This means that reopening 'active' will recursively reopen all its children, whose options can be changed in the process. However after the 'block-commit' call base.inherits_from is NULL and the chain is broken, so 'base' does not inherit from 'active' and will not be reopened automatically: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 { 'execute': 'block-commit', 'arguments': { 'device': 'none0', 'top': 'hd1.qcow2' } } { 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.l2-cache-size=2M"' } } { "return": "Cannot change the option 'backing.l2-cache-size'\r\n"} This patch updates base.inherits_from in this scenario, and adds a test case. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:38 +03:00
*** Commit and then change an option on the backing file
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=1048576
iotests: Specify explicit backing format where sensible There are many existing qcow2 images that specify a backing file but no format. This has been the source of CVEs in the past, but has become more prominent of a problem now that libvirt has switched to -blockdev. With older -drive, at least the probing was always done by qemu (so the only risk of a changed format between successive boots of a guest was if qemu was upgraded and probed differently). But with newer -blockdev, libvirt must specify a format; if libvirt guesses raw where the image was formatted, this results in data corruption visible to the guest; conversely, if libvirt guesses qcow2 where qemu was using raw, this can result in potential security holes, so modern libvirt instead refuses to use images without explicit backing format. The change in libvirt to reject images without explicit backing format has pointed out that a number of tools have been far too reliant on probing in the past. It's time to set a better example in our own iotests of properly setting this parameter. iotest calls to create, rebase, and convert are all impacted to some degree. It's a bit annoying that we are inconsistent on command line - while all of those accept -o backing_file=...,backing_fmt=..., the shortcuts are different: create and rebase have -b and -F, while convert has -B but no -F. (amend has no shortcuts, but the previous patch just deprecated the use of amend to change backing chains). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-9-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-07-06 23:39:52 +03:00
Formatting 'TEST_DIR/t.IMGFMT.int', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT.int backing_fmt=IMGFMT
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'qmp_capabilities' }
block: Update BlockDriverState.inherits_from on bdrv_drop_intermediate() The previous patch fixed the inherits_from pointer after block-stream, and this one does the same for block-commit. When block-commit finishes and the 'top' node is not the topmost one from the backing chain then all nodes above 'base' up to and including 'top' are removed from the chain. The bdrv_drop_intermediate() call converts a chain like this one: base <- intermediate <- top <- active into this one: base <- active In a simple scenario each backing file from the first chain has the inherits_from attribute pointing to its parent. This means that reopening 'active' will recursively reopen all its children, whose options can be changed in the process. However after the 'block-commit' call base.inherits_from is NULL and the chain is broken, so 'base' does not inherit from 'active' and will not be reopened automatically: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 { 'execute': 'block-commit', 'arguments': { 'device': 'none0', 'top': 'hd1.qcow2' } } { 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.l2-cache-size=2M"' } } { "return": "Cannot change the option 'backing.l2-cache-size'\r\n"} This patch updates base.inherits_from in this scenario, and adds a test case. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:38 +03:00
{"return": {}}
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'block-commit', 'arguments': { 'device': 'none0', 'top': 'TEST_DIR/t.IMGFMT.int' } }
block: Update BlockDriverState.inherits_from on bdrv_drop_intermediate() The previous patch fixed the inherits_from pointer after block-stream, and this one does the same for block-commit. When block-commit finishes and the 'top' node is not the topmost one from the backing chain then all nodes above 'base' up to and including 'top' are removed from the chain. The bdrv_drop_intermediate() call converts a chain like this one: base <- intermediate <- top <- active into this one: base <- active In a simple scenario each backing file from the first chain has the inherits_from attribute pointing to its parent. This means that reopening 'active' will recursively reopen all its children, whose options can be changed in the process. However after the 'block-commit' call base.inherits_from is NULL and the chain is broken, so 'base' does not inherit from 'active' and will not be reopened automatically: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 { 'execute': 'block-commit', 'arguments': { 'device': 'none0', 'top': 'hd1.qcow2' } } { 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.l2-cache-size=2M"' } } { "return": "Cannot change the option 'backing.l2-cache-size'\r\n"} This patch updates base.inherits_from in this scenario, and adds a test case. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:38 +03:00
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "none0"}}
{"return": {}}
iotests: Include QMP input in .out files We generally include relevant HMP input in .out files, by virtue of the fact that HMP echoes its input. But QMP does not, so we have to explicitly inject it in the output stream (appropriately filtered to keep the tests passing), in order to make it easier to read .out files to see what behavior is being tested (especially true where the output file is a sequence of {'return': {}}). Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20191114213415.23499-4-eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2019-11-15 00:34:14 +03:00
{ 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.detect-zeroes=on"' } }
block: Update BlockDriverState.inherits_from on bdrv_drop_intermediate() The previous patch fixed the inherits_from pointer after block-stream, and this one does the same for block-commit. When block-commit finishes and the 'top' node is not the topmost one from the backing chain then all nodes above 'base' up to and including 'top' are removed from the chain. The bdrv_drop_intermediate() call converts a chain like this one: base <- intermediate <- top <- active into this one: base <- active In a simple scenario each backing file from the first chain has the inherits_from attribute pointing to its parent. This means that reopening 'active' will recursively reopen all its children, whose options can be changed in the process. However after the 'block-commit' call base.inherits_from is NULL and the chain is broken, so 'base' does not inherit from 'active' and will not be reopened automatically: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 { 'execute': 'block-commit', 'arguments': { 'device': 'none0', 'top': 'hd1.qcow2' } } { 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io none0 "reopen -o backing.l2-cache-size=2M"' } } { "return": "Cannot change the option 'backing.l2-cache-size'\r\n"} This patch updates base.inherits_from in this scenario, and adds a test case. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:38 +03:00
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "none0", "len": 1048576, "offset": 1048576, "speed": 0, "type": "commit"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "none0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "none0"}}
{"return": ""}
block: Update BlockDriverState.inherits_from on bdrv_set_backing_hd() When a BlockDriverState's child is opened (be it a backing file, the protocol layer, or any other) inherits_from is set to point to the parent node. Children opened separately and then attached to a parent don't have this pointer set. bdrv_reopen_queue_child() uses this to determine whether a node's children must also be reopened inheriting the options from the parent or not. If inherits_from points to the parent then the child is reopened and its options can be changed, like in this example: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 hd1.qcow2 1M $ $QEMU -drive if=none,node-name=hd0,file=hd0.qcow2,\ backing.driver=qcow2,backing.file.filename=hd1.qcow2 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" If the child does not inherit from the parent then it does not get reopened and its options cannot be changed: $ $QEMU -drive if=none,node-name=hd1,file=hd1.qcow2 -drive if=none,node-name=hd0,file=hd0.qcow2,backing=hd1 (qemu) qemu-io hd0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' If a disk image has a chain of backing files then all of them are also connected through their inherits_from pointers (i.e. it's possible to walk the chain in reverse order from base to top). However this is broken if the intermediate nodes are removed using e.g. block-stream because the inherits_from pointer from the base node becomes NULL: $ qemu-img create -f qcow2 hd0.qcow2 1M $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2 $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2 $ $QEMU -drive if=none,file=hd2.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" (qemu) block_stream none0 0 hd0.qcow2 (qemu) qemu-io none0 "reopen -o backing.l2-cache-size=2M" Cannot change the option 'backing.l2-cache-size' This patch updates the inherits_from pointer if the intermediate nodes of a backing chain are removed using bdrv_set_backing_hd(), and adds a test case for this scenario. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-10-31 19:16:37 +03:00
*** done
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