kclient: special case LOOKUPSNAP in fill_trace to add in the dentry

diff --git a/src/kernel/inode.c b/src/kernel/inode.c
index 777eecb8981d0b8d81061b1d1ad826553035e663..3c386fe5d702af7929726e9e8abf06752b18015a 100644 (file)
--- a/src/kernel/inode.c
+++ b/src/kernel/inode.c
@@ -960,6 +960,30 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
                                            req->r_request_started);
                dout(10, " final dn %p\n", dn);
                i++;
+       } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP) {
+               struct dentry *dn = req->r_dentry;
+
+               /* fill out a snapdir LOOKUPSNAP dentry */
+               BUG_ON(!dn);
+               BUG_ON(!req->r_locked_dir);
+               BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR);
+               ininfo = rinfo->targeti.in;
+               vino.ino = le64_to_cpu(ininfo->ino);
+               vino.snap = le64_to_cpu(ininfo->snapid);
+               in = ceph_get_inode(sb, vino);
+               if (IS_ERR(in)) {
+                       derr(30, "get_inode badness\n");
+                       err = PTR_ERR(in);
+                       d_delete(dn);
+                       goto done;
+               }
+               dn = splice_dentry(dn, in, NULL);
+               if (IS_ERR(dn)) {
+                       err = PTR_ERR(dn);
+                       goto done;
+               }
+               req->r_dentry = dn;  /* may have spliced */
+               igrab(in);
        }
 
        if (rinfo->head->is_target) {