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authorAl Viro <viro@zeniv.linux.org.uk>2016-04-14 19:12:42 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2016-05-02 19:47:24 -0400
commit383d4e8ab02c02f7b31f90174c644d935c223c85 (patch)
treed2de1aa2da96077c92b2c741872930b5cb9ff6d3 /fs/exportfs
parent1ae1f3f64735905d1751a64ae4b05b9509486612 (diff)
downloadlinux-stericsson-383d4e8ab02c02f7b31f90174c644d935c223c85.tar.gz
reconnect_one(): use lookup_one_len_unlocked()
... and explain the non-obvious logics in case when lookup yields a different dentry. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/exportfs')
-rw-r--r--fs/exportfs/expfs.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index c46f1a190b8d..402c5caab5ca 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -143,14 +143,18 @@ static struct dentry *reconnect_one(struct vfsmount *mnt,
if (err)
goto out_err;
dprintk("%s: found name: %s\n", __func__, nbuf);
- inode_lock(parent->d_inode);
- tmp = lookup_one_len(nbuf, parent, strlen(nbuf));
- inode_unlock(parent->d_inode);
+ tmp = lookup_one_len_unlocked(nbuf, parent, strlen(nbuf));
if (IS_ERR(tmp)) {
dprintk("%s: lookup failed: %d\n", __func__, PTR_ERR(tmp));
goto out_err;
}
if (tmp != dentry) {
+ /*
+ * Somebody has renamed it since exportfs_get_name();
+ * great, since it could've only been renamed if it
+ * got looked up and thus connected, and it would
+ * remain connected afterwards. We are done.
+ */
dput(tmp);
goto out_reconnected;
}