nfs: add handling for CB_NOTIFY_LOCK in client
For now, the callback doesn't do anything. Support for that will be
added in later patches.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index a710825..eb094c6 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -35,6 +35,7 @@
(1 + 3) * 4) // seqid, 3 slotids
#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
+#define CB_OP_NOTIFY_LOCK_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
#endif /* CONFIG_NFS_V4_1 */
#define NFSDBG_FACILITY NFSDBG_CALLBACK
@@ -534,6 +535,49 @@
return 0;
}
+static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args)
+{
+ __be32 *p;
+ unsigned int len;
+
+ p = read_buf(xdr, 12);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_BADXDR);
+
+ p = xdr_decode_hyper(p, &args->cbnl_owner.clientid);
+ len = be32_to_cpu(*p);
+
+ p = read_buf(xdr, len);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_BADXDR);
+
+ /* Only try to decode if the length is right */
+ if (len == 20) {
+ p += 2; /* skip "lock id:" */
+ args->cbnl_owner.s_dev = be32_to_cpu(*p++);
+ xdr_decode_hyper(p, &args->cbnl_owner.id);
+ args->cbnl_valid = true;
+ } else {
+ args->cbnl_owner.s_dev = 0;
+ args->cbnl_owner.id = 0;
+ args->cbnl_valid = false;
+ }
+ return 0;
+}
+
+static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_notify_lock_args *args)
+{
+ __be32 status;
+
+ status = decode_fh(xdr, &args->cbnl_fh);
+ if (unlikely(status != 0))
+ goto out;
+ status = decode_lockowner(xdr, args);
+out:
+ dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
+ return status;
+}
+
#endif /* CONFIG_NFS_V4_1 */
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
@@ -746,6 +790,7 @@
case OP_CB_RECALL_SLOT:
case OP_CB_LAYOUTRECALL:
case OP_CB_NOTIFY_DEVICEID:
+ case OP_CB_NOTIFY_LOCK:
*op = &callback_ops[op_nr];
break;
@@ -753,7 +798,6 @@
case OP_CB_PUSH_DELEG:
case OP_CB_RECALLABLE_OBJ_AVAIL:
case OP_CB_WANTS_CANCELLED:
- case OP_CB_NOTIFY_LOCK:
return htonl(NFS4ERR_NOTSUPP);
default:
@@ -1006,6 +1050,11 @@
.decode_args = (callback_decode_arg_t)decode_recallslot_args,
.res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ,
},
+ [OP_CB_NOTIFY_LOCK] = {
+ .process_op = (callback_process_op_t)nfs4_callback_notify_lock,
+ .decode_args = (callback_decode_arg_t)decode_notify_lock_args,
+ .res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ,
+ },
#endif /* CONFIG_NFS_V4_1 */
};