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ceph/qa/rbd/krbd_parent_overlap.t

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qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
For reads, only the object extent needs to be reverse mapped:
qa: krbd_parent_overlap.t: fix read test It turns out this test has not been triggering the right code path for a while now (krbd_parent_overlap.t was added just over a year ago, but the original test goes back a few years). To do its job it needs an empty clone with the overlap set to somewhere in the middle of an object. The test relied on shrinking for this, but shrinking no longer fits the bill because a copyup is now performed for the object with the overlap -- we never go to the parent after that. Let's size the parent so that it ends in the middle of an object and then grow an empty clone instead. Also, while reading from page cache does seem to trigger a read that straddles the overlap, it's not very reliable, so supplement it with a direct read. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-08-28 15:07:07 +00:00
$ rbd create --size 5M img
qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
$ DEV=$(sudo rbd map img)
qa: krbd_parent_overlap.t: fix read test It turns out this test has not been triggering the right code path for a while now (krbd_parent_overlap.t was added just over a year ago, but the original test goes back a few years). To do its job it needs an empty clone with the overlap set to somewhere in the middle of an object. The test relied on shrinking for this, but shrinking no longer fits the bill because a copyup is now performed for the object with the overlap -- we never go to the parent after that. Let's size the parent so that it ends in the middle of an object and then grow an empty clone instead. Also, while reading from page cache does seem to trigger a read that straddles the overlap, it's not very reliable, so supplement it with a direct read. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-08-28 15:07:07 +00:00
$ xfs_io -c 'pwrite 0 5M' $DEV >/dev/null
qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
$ sudo rbd unmap $DEV
qa: update krbd tests for snap create "rbd snap create" now reports progress. Pass --no-progress, as in commit b5a5fea9e2b4 ("test/cli-integration/rbd: tweak after snap create started to show progress"). Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-11 15:45:18 +00:00
$ rbd snap create --no-progress img@snap
qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
$ rbd snap protect img@snap
$ rbd clone img@snap cloneimg
qa: krbd_parent_overlap.t: fix read test It turns out this test has not been triggering the right code path for a while now (krbd_parent_overlap.t was added just over a year ago, but the original test goes back a few years). To do its job it needs an empty clone with the overlap set to somewhere in the middle of an object. The test relied on shrinking for this, but shrinking no longer fits the bill because a copyup is now performed for the object with the overlap -- we never go to the parent after that. Let's size the parent so that it ends in the middle of an object and then grow an empty clone instead. Also, while reading from page cache does seem to trigger a read that straddles the overlap, it's not very reliable, so supplement it with a direct read. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-08-28 15:07:07 +00:00
$ rbd resize --no-progress --size 12M cloneimg
qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
$ DEV=$(sudo rbd map cloneimg)
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0500000 0000 0000 0000 0000 0000 0000 0000 0000
*
qa: krbd_parent_overlap.t: fix read test It turns out this test has not been triggering the right code path for a while now (krbd_parent_overlap.t was added just over a year ago, but the original test goes back a few years). To do its job it needs an empty clone with the overlap set to somewhere in the middle of an object. The test relied on shrinking for this, but shrinking no longer fits the bill because a copyup is now performed for the object with the overlap -- we never go to the parent after that. Let's size the parent so that it ends in the middle of an object and then grow an empty clone instead. Also, while reading from page cache does seem to trigger a read that straddles the overlap, it's not very reliable, so supplement it with a direct read. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-08-28 15:07:07 +00:00
0c00000
$ dd if=$DEV iflag=direct bs=4M status=none | hexdump
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0500000 0000 0000 0000 0000 0000 0000 0000 0000
*
0c00000
qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
$ sudo rbd unmap $DEV
$ rbd rm --no-progress cloneimg
$ rbd snap unprotect img@snap
$ rbd snap rm --no-progress img@snap
$ rbd rm --no-progress img
For writes, the entire object needs to be reverse mapped:
$ rbd create --size 2M img
$ DEV=$(sudo rbd map img)
$ xfs_io -c 'pwrite 0 1M' $DEV >/dev/null
$ sudo rbd unmap $DEV
qa: update krbd tests for snap create "rbd snap create" now reports progress. Pass --no-progress, as in commit b5a5fea9e2b4 ("test/cli-integration/rbd: tweak after snap create started to show progress"). Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-11 15:45:18 +00:00
$ rbd snap create --no-progress img@snap
qa: krbd parent-overlap test Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-02-28 10:36:40 +00:00
$ rbd snap protect img@snap
$ rbd clone img@snap cloneimg
$ rbd resize --no-progress --size 8M cloneimg
$ DEV=$(sudo rbd map cloneimg)
$ xfs_io -c 'pwrite -S 0xef 3M 1M' $DEV >/dev/null
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0100000 0000 0000 0000 0000 0000 0000 0000 0000
*
0300000 efef efef efef efef efef efef efef efef
*
0400000 0000 0000 0000 0000 0000 0000 0000 0000
*
0800000
$ sudo rbd unmap $DEV
$ DEV=$(sudo rbd map cloneimg)
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0100000 0000 0000 0000 0000 0000 0000 0000 0000
*
0300000 efef efef efef efef efef efef efef efef
*
0400000 0000 0000 0000 0000 0000 0000 0000 0000
*
0800000
$ sudo rbd unmap $DEV
$ rbd rm --no-progress cloneimg
$ rbd snap unprotect img@snap
$ rbd snap rm --no-progress img@snap
$ rbd rm --no-progress img
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