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ceph: fix __choose_mds() for LSSNAP request 

previous commit 5d37ca14 "ceph: send LSSNAP request to auth mds
of directory inode" is buggy. It makes __choose_mds() choose mds
base on hash of '.snap' dentry.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2017-09-22 11:41:06 +08:00 committed by Ilya Dryomov
parent 9f4057fc93
commit 38f340ccdf
1 changed files with 6 additions and 5 deletions
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11
fs/ceph/mds_client.c
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@ -734,12 +734,13 @@ static int __choose_mds(struct ceph_mds_client *mdsc,
inode = req->r_inode;
ihold(inode);
} else {
/* req->r_dentry is non-null for LSSNAP request.
* fall-thru */
WARN_ON_ONCE(!req->r_dentry);
/* req->r_dentry is non-null for LSSNAP request */
rcu_read_lock();
inode = get_nonsnap_parent(req->r_dentry);
rcu_read_unlock();
dout("__choose_mds using snapdir's parent %p\n", inode);
}
}
if (!inode && req->r_dentry) {
} else if (req->r_dentry) {
/* ignore race with rename; old or new d_parent is okay */
struct dentry *parent;
struct inode *dir;