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mds: wait unlink to finish to avoid conflict when creating same dentries #46331

Merged
merged 2 commits into from Oct 11, 2022
Merged

mds: wait unlink to finish to avoid conflict when creating same dentries #46331

merged 2 commits into from Oct 11, 2022

Commits on Aug 12, 2022

  1. mds: wait unlink to finish to avoid conflict when creating same dentries 

    If the previous unlink request has been delayed due to some reasons,
and the new creating for the same dentry may fail or new open will
succeeds but new contents wrote to it will be lost.

The kernel client will make sure before the unlink getting the first
reply it won't send the followed create requests for the same dentry.
Here we need to make sure that before the first reply has been sent
out the dentry must be marked as unlinking.

Fixes: https://tracker.ceph.com/issues/55332
Signed-off-by: Xiubo Li <xiubli@redhat.com>
    @lxbsz
    lxbsz committed Aug 12, 2022
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  2. mds: clear the STATE_UNLINKING state when the unlink fails 

    Signed-off-by: Xiubo Li <xiubli@redhat.com>
    @lxbsz
    lxbsz committed Aug 12, 2022
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