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authorSage Weil <sage@newdream.net>2011-04-06 09:31:40 -0700
committerSage Weil <sage@newdream.net>2011-05-24 11:52:05 -0700
commit3c454cf21645bc96668e286f6352ac2c4c895fa2 (patch)
tree9ad5d408a07819d3e1155fb98df44c92f86a0eb5 /fs/ceph/export.c
parentaedfec59eed37d1ff7ce09b303b668234e9a7f8e (diff)
ceph: use LOOKUPINO to make unconnected nfs fh more reliable
If we are unable to locate an inode by ino, ask the MDS using the new LOOKUPINO command. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/export.c')
-rw-r--r--fs/ceph/export.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index e41056174bf..f1828af0991 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -86,6 +86,7 @@ static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len,
static struct dentry *__fh_to_dentry(struct super_block *sb,
struct ceph_nfs_fh *fh)
{
+ struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct inode *inode;
struct dentry *dentry;
struct ceph_vino vino;
@@ -95,8 +96,22 @@ static struct dentry *__fh_to_dentry(struct super_block *sb,
vino.ino = fh->ino;
vino.snap = CEPH_NOSNAP;
inode = ceph_find_inode(sb, vino);
- if (!inode)
- return ERR_PTR(-ESTALE);
+ if (!inode) {
+ struct ceph_mds_request *req;
+
+ req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPINO,
+ USE_ANY_MDS);
+ if (IS_ERR(req))
+ return ERR_CAST(req);
+
+ req->r_ino1 = vino;
+ req->r_num_caps = 1;
+ err = ceph_mdsc_do_request(mdsc, NULL, req);
+ ceph_mdsc_put_request(req);
+ inode = ceph_find_inode(sb, vino);
+ if (!inode)
+ return ERR_PTR(-ESTALE);
+ }
dentry = d_obtain_alias(inode);
if (IS_ERR(dentry)) {