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authorYan, Zheng <zheng.z.yan@intel.com>2014-03-06 12:40:32 +0400
committerYan, Zheng <zheng.z.yan@intel.com>2014-04-03 06:33:53 +0400
commit19913b4eac4a230dccb548931358398f45dabe4c (patch)
treeba858471538ae0b32fe42ab1c73bdaf559bbf2fd /fs/ceph/export.c
parent8996f4f23db735f0f3bab34352188b1ab21d7d7f (diff)
downloadlinux-19913b4eac4a230dccb548931358398f45dabe4c.tar.xz
ceph: add get_name() NFS export callback
Use the newly introduced LOOKUPNAME MDS request to connect child inode to its parent directory. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs/ceph/export.c')
-rw-r--r--fs/ceph/export.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index eb66408ff236..00d6af6a32ec 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -202,9 +202,49 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb,
return dentry;
}
+static int ceph_get_name(struct dentry *parent, char *name,
+ struct dentry *child)
+{
+ struct ceph_mds_client *mdsc;
+ struct ceph_mds_request *req;
+ int err;
+
+ mdsc = ceph_inode_to_client(child->d_inode)->mdsc;
+ req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPNAME,
+ USE_ANY_MDS);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ mutex_lock(&parent->d_inode->i_mutex);
+
+ req->r_inode = child->d_inode;
+ ihold(child->d_inode);
+ req->r_ino2 = ceph_vino(parent->d_inode);
+ req->r_locked_dir = parent->d_inode;
+ req->r_num_caps = 2;
+ err = ceph_mdsc_do_request(mdsc, NULL, req);
+
+ mutex_unlock(&parent->d_inode->i_mutex);
+
+ if (!err) {
+ struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
+ memcpy(name, rinfo->dname, rinfo->dname_len);
+ name[rinfo->dname_len] = 0;
+ dout("get_name %p ino %llx.%llx name %s\n",
+ child, ceph_vinop(child->d_inode), name);
+ } else {
+ dout("get_name %p ino %llx.%llx err %d\n",
+ child, ceph_vinop(child->d_inode), err);
+ }
+
+ ceph_mdsc_put_request(req);
+ return err;
+}
+
const struct export_operations ceph_export_ops = {
.encode_fh = ceph_encode_fh,
.fh_to_dentry = ceph_fh_to_dentry,
.fh_to_parent = ceph_fh_to_parent,
.get_parent = ceph_get_parent,
+ .get_name = ceph_get_name,
};