ceph: avoid inode lookup on nfs fh reconnect

If we get the inode from the MDS, we have a reference in req; don't do a
fresh lookup.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index f1828af09912..a610d3d67488 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -107,8 +107,10 @@ static struct dentry *__fh_to_dentry(struct super_block *sb,
                 req->r_ino1 = vino;
                 req->r_num_caps = 1;
                 err = ceph_mdsc_do_request(mdsc, NULL, req);
+                inode = req->r_target_inode;
+                if (inode)
+                        igrab(inode);
                 ceph_mdsc_put_request(req);
-                inode = ceph_find_inode(sb, vino);
                 if (!inode)
                         return ERR_PTR(-ESTALE);
         }
@@ -163,8 +165,10 @@ static struct dentry *__cfh_to_dentry(struct super_block *sb,
                 snprintf(req->r_path2, 16, "%d", cfh->parent_name_hash);
                 req->r_num_caps = 1;
                 err = ceph_mdsc_do_request(mdsc, NULL, req);
+                inode = req->r_target_inode;
+                if (inode)
+                        igrab(inode);
                 ceph_mdsc_put_request(req);
-                inode = ceph_find_inode(sb, vino);
                 if (!inode)
                         return ERR_PTR(err ? err : -ESTALE);
         }