pnfs: CB_LAYOUTRECALL xdr code

This is the xdr decoding for CB_LAYOUTRECALL.

Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com>
Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index b678e3e..f6768ac 100644 (file)
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -138,6 +138,25 @@ extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
                                         void *dummy,
                                         struct cb_process_state *cps);
 
+struct cb_layoutrecallargs {
+       struct sockaddr         *cbl_addr;
+       uint32_t                cbl_recall_type;
+       uint32_t                cbl_layout_type;
+       uint32_t                cbl_layoutchanged;
+       union {
+               struct {
+                       struct nfs_fh           cbl_fh;
+                       struct pnfs_layout_range cbl_range;
+                       nfs4_stateid            cbl_stateid;
+               };
+               struct nfs_fsid         cbl_fsid;
+       };
+};
+
+extern unsigned nfs4_callback_layoutrecall(
+       struct cb_layoutrecallargs *args,
+       void *dummy, struct cb_process_state *cps);
+
 extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses);
 extern void nfs4_cb_take_slot(struct nfs_client *clp);
 #endif /* CONFIG_NFS_V4_1 */

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index c1bead2..c1bb157 100644 (file)
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -107,6 +107,12 @@ int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nf
 
 #if defined(CONFIG_NFS_V4_1)
 
+__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args,
+                                 void *dummy, struct cb_process_state *cps)
+{
+       return cpu_to_be32(NFS4ERR_NOTSUPP); /* STUB */
+}
+
 int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
 {
        if (delegation == NULL)

diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 7a2d6c5..23112c2 100644 (file)
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -24,6 +24,7 @@
 #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
 
 #if defined(CONFIG_NFS_V4_1)
+#define CB_OP_LAYOUTRECALL_RES_MAXSZ   (CB_OP_HDR_RES_MAXSZ)
 #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)
@@ -223,6 +224,66 @@ out:
 
 #if defined(CONFIG_NFS_V4_1)
 
+static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
+                                      struct xdr_stream *xdr,
+                                      struct cb_layoutrecallargs *args)
+{
+       __be32 *p;
+       __be32 status = 0;
+       uint32_t iomode;
+
+       args->cbl_addr = svc_addr(rqstp);
+       p = read_buf(xdr, 4 * sizeof(uint32_t));
+       if (unlikely(p == NULL)) {
+               status = htonl(NFS4ERR_BADXDR);
+               goto out;
+       }
+
+       args->cbl_layout_type = ntohl(*p++);
+       /* Depite the spec's xdr, iomode really belongs in the FILE switch,
+        * as it is unuseable and ignored with the other types.
+        */
+       iomode = ntohl(*p++);
+       args->cbl_layoutchanged = ntohl(*p++);
+       args->cbl_recall_type = ntohl(*p++);
+
+       if (args->cbl_recall_type == RETURN_FILE) {
+               args->cbl_range.iomode = iomode;
+               status = decode_fh(xdr, &args->cbl_fh);
+               if (unlikely(status != 0))
+                       goto out;
+
+               p = read_buf(xdr, 2 * sizeof(uint64_t));
+               if (unlikely(p == NULL)) {
+                       status = htonl(NFS4ERR_BADXDR);
+                       goto out;
+               }
+               p = xdr_decode_hyper(p, &args->cbl_range.offset);
+               p = xdr_decode_hyper(p, &args->cbl_range.length);
+               status = decode_stateid(xdr, &args->cbl_stateid);
+               if (unlikely(status != 0))
+                       goto out;
+       } else if (args->cbl_recall_type == RETURN_FSID) {
+               p = read_buf(xdr, 2 * sizeof(uint64_t));
+               if (unlikely(p == NULL)) {
+                       status = htonl(NFS4ERR_BADXDR);
+                       goto out;
+               }
+               p = xdr_decode_hyper(p, &args->cbl_fsid.major);
+               p = xdr_decode_hyper(p, &args->cbl_fsid.minor);
+       } else if (args->cbl_recall_type != RETURN_ALL) {
+               status = htonl(NFS4ERR_BADXDR);
+               goto out;
+       }
+       dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n",
+               __func__,
+               args->cbl_layout_type, iomode,
+               args->cbl_layoutchanged, args->cbl_recall_type);
+out:
+       dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
+       return status;
+}
+
 static __be32 decode_sessionid(struct xdr_stream *xdr,
                                 struct nfs4_sessionid *sid)
 {
@@ -577,10 +638,10 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
        case OP_CB_SEQUENCE:
        case OP_CB_RECALL_ANY:
        case OP_CB_RECALL_SLOT:
+       case OP_CB_LAYOUTRECALL:
                *op = &callback_ops[op_nr];
                break;
 
-       case OP_CB_LAYOUTRECALL:
        case OP_CB_NOTIFY_DEVICEID:
        case OP_CB_NOTIFY:
        case OP_CB_PUSH_DELEG:
@@ -783,6 +844,12 @@ static struct callback_op callback_ops[] = {
                .res_maxsize = CB_OP_RECALL_RES_MAXSZ,
        },
 #if defined(CONFIG_NFS_V4_1)
+       [OP_CB_LAYOUTRECALL] = {
+               .process_op = (callback_process_op_t)nfs4_callback_layoutrecall,
+               .decode_args =
+                       (callback_decode_arg_t)decode_layoutrecall_args,
+               .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ,
+       },
        [OP_CB_SEQUENCE] = {
                .process_op = (callback_process_op_t)nfs4_callback_sequence,
                .decode_args = (callback_decode_arg_t)decode_cb_sequence_args,