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Commit d69ed05a authored by Sage Weil's avatar Sage Weil
Browse files

ceph: handle splice_dentry/d_materialize_unique error in readdir_prepopulate 



Handle a splice_dentry failure (due to a d_materialize_unique error)
without crashing.  (Also, report the error code.)

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent cebc5be6

fs/ceph/inode.c

+12 −7
Original line number Diff line number Diff line
@@ -854,8 +854,8 @@ static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, 
		d_drop(dn);

	realdn = d_materialise_unique(dn, in);

	if (IS_ERR(realdn)) {

		pr_err("splice_dentry error %p inode %p ino %llx.%llx\n",

		       dn, in, ceph_vinop(in));

		pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",

		       PTR_ERR(realdn), dn, in, ceph_vinop(in));

		if (prehash)

			*prehash = false; /* don't rehash on error */

		dn = realdn; /* note realdn contains the error */
@@ -1234,17 +1234,22 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req, 
				goto out;

			}

			dn = splice_dentry(dn, in, NULL);

			if (IS_ERR(dn))

				dn = NULL;

		}



		if (fill_inode(in, &rinfo->dir_in[i], NULL, session,

			       req->r_request_started, -1,

			       &req->r_caps_reservation) < 0) {

			pr_err("fill_inode badness on %p\n", in);

			dput(dn);

			continue;

			goto next_item;

		}

		if (dn)

			update_dentry_lease(dn, rinfo->dir_dlease[i],

				    req->r_session, req->r_request_started);

					    req->r_session,

					    req->r_request_started);

next_item:

		if (dn)

			dput(dn);

	}

	req->r_did_prepopulate = true;