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| author | Yan, Zheng <zyan@redhat.com> | 2017-09-22 11:41:06 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-10-02 16:18:16 +0200 |
| commit | 38f340ccdf9ed5f1350505b46c5689d015967057 (patch) | |
| tree | 23fd6ca51606fdf6481977bb1e81fa9cba446619 | |
| parent | 9f4057fc937f200f000dbc378c5c3e37d45e31dc (diff) | |
| download | linux-38f340ccdf9ed5f1350505b46c5689d015967057.tar.bz2 | |
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>
| -rw-r--r-- | fs/ceph/mds_client.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 84edfc60d87a..f23c820daaed 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -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; |