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authorXiubo Li <xiubli@redhat.com>2022-05-10 04:47:01 +0300
committerIlya Dryomov <idryomov@gmail.com>2022-08-03 01:54:12 +0300
commit4868e537fa867f82e38e37429d61d7bb8357d79b (patch)
treebadea4f6181c6755959c8a44c4b84f527da23cad /fs/ceph/mds_client.h
parent4f48d5da81ee7004a789c8aac2d0dfb2514c37f1 (diff)
downloadlinux-4868e537fa867f82e38e37429d61d7bb8357d79b.tar.xz
ceph: wait for the first reply of inflight async unlink
In async unlink case the kclient won't wait for the first reply from MDS and just drop all the links and unhash the dentry and then succeeds immediately. For any new create/link/rename,etc requests followed by using the same file names we must wait for the first reply of the inflight unlink request, or the MDS possibly will fail these following requests with -EEXIST if the inflight async unlink request was delayed for some reasons. And the worst case is that for the none async openc request it will successfully open the file if the CDentry hasn't been unlinked yet, but later the previous delayed async unlink request will remove the CDenty. That means the just created file is possiblly deleted later by accident. We need to wait for the inflight async unlink requests to finish when creating new files/directories by using the same file names. Link: https://tracker.ceph.com/issues/55332 Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/mds_client.h')
-rw-r--r--fs/ceph/mds_client.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 4620167f58eb..d8ec2ac93da3 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -575,6 +575,7 @@ static inline int ceph_wait_on_async_create(struct inode *inode)
TASK_KILLABLE);
}
+extern int ceph_wait_on_conflict_unlink(struct dentry *dentry);
extern u64 ceph_get_deleg_ino(struct ceph_mds_session *session);
extern int ceph_restore_deleg_ino(struct ceph_mds_session *session, u64 ino);
#endif