nfs41: V2 initial support for CB_RECALL_ANY

For now the clients returns _all_ the delegations of the specificed type
it holds

Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 26 insertions, 1 deletions

diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 0fda5e66241d..8e1a2511c8be 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -23,6 +23,7 @@
 #if defined(CONFIG_NFS_V4_1)
 #define CB_OP_SEQUENCE_RES_MAXSZ        (CB_OP_HDR_RES_MAXSZ + \
                                         4 + 1 + 3)
+#define CB_OP_RECALLANY_RES_MAXSZ       (CB_OP_HDR_RES_MAXSZ)
 #endif /* CONFIG_NFS_V4_1 */
 
 #define NFSDBG_FACILITY NFSDBG_CALLBACK
@@ -326,6 +327,25 @@ out_free:
         goto out;
 }
 
+static unsigned decode_recallany_args(struct svc_rqst *rqstp,
+                                      struct xdr_stream *xdr,
+                                      struct cb_recallanyargs *args)
+{
+        uint32_t *p;
+
+        args->craa_addr = svc_addr(rqstp);
+        p = read_buf(xdr, 4);
+        if (unlikely(p == NULL))
+                return htonl(NFS4ERR_BADXDR);
+        args->craa_objs_to_keep = ntohl(*p++);
+        p = read_buf(xdr, 4);
+        if (unlikely(p == NULL))
+                return htonl(NFS4ERR_BADXDR);
+        args->craa_type_mask = ntohl(*p);
+
+        return 0;
+}
+
 #endif /* CONFIG_NFS_V4_1 */
 
 static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
@@ -533,6 +553,7 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
         case OP_CB_GETATTR:
         case OP_CB_RECALL:
         case OP_CB_SEQUENCE:
+        case OP_CB_RECALL_ANY:
                 *op = &callback_ops[op_nr];
                 break;
 
@@ -540,7 +561,6 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
         case OP_CB_NOTIFY_DEVICEID:
         case OP_CB_NOTIFY:
         case OP_CB_PUSH_DELEG:
-        case OP_CB_RECALL_ANY:
         case OP_CB_RECALLABLE_OBJ_AVAIL:
         case OP_CB_RECALL_SLOT:
         case OP_CB_WANTS_CANCELLED:
@@ -688,6 +708,11 @@ static struct callback_op callback_ops[] = {
                 .encode_res = (callback_encode_res_t)encode_cb_sequence_res,
                 .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ,
         },
+        [OP_CB_RECALL_ANY] = {
+                .process_op = (callback_process_op_t)nfs4_callback_recallany,
+                .decode_args = (callback_decode_arg_t)decode_recallany_args,
+                .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ,
+        },
 #endif /* CONFIG_NFS_V4_1 */
 };