NFS OFFLOAD_CANCEL xdr

Signed-off-by: Olga Kornievskaia <[e-mail]>
Signed-off-by: Anna Schumaker <[e-mail]>

fs/nfs/nfs42xdr.c

···
 					 NFS42_WRITE_RES_SIZE + \
 					 1 /* cr_consecutive */ + \
 					 1 /* cr_synchronous */)
+#define encode_offload_cancel_maxsz	(op_encode_hdr_maxsz + \
+					 XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_offload_cancel_maxsz	(op_decode_hdr_maxsz)
 #define encode_deallocate_maxsz		(op_encode_hdr_maxsz + \
 					 encode_fallocate_maxsz)
 #define decode_deallocate_maxsz		(op_decode_hdr_maxsz)
···
 					 decode_putfh_maxsz + \
 					 decode_copy_maxsz + \
 					 decode_commit_maxsz)
+#define NFS4_enc_offload_cancel_sz	(compound_encode_hdr_maxsz + \
+					 encode_putfh_maxsz + \
+					 encode_offload_cancel_maxsz)
+#define NFS4_dec_offload_cancel_sz	(compound_decode_hdr_maxsz + \
+					 decode_putfh_maxsz + \
+					 decode_offload_cancel_maxsz)
 #define NFS4_enc_deallocate_sz		(compound_encode_hdr_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_deallocate_maxsz + \
···
 	encode_uint32(xdr, 1); /* consecutive = true */
 	encode_uint32(xdr, 1); /* synchronous = true */
 	encode_uint32(xdr, 0); /* src server list */
+}
+
+static void encode_offload_cancel(struct xdr_stream *xdr,
+				  const struct nfs42_offload_status_args *args,
+				  struct compound_hdr *hdr)
+{
+	encode_op_hdr(xdr, OP_OFFLOAD_CANCEL, decode_offload_cancel_maxsz, hdr);
+	encode_nfs4_stateid(xdr, &args->osa_stateid);
 }
 
 static void encode_deallocate(struct xdr_stream *xdr,
···
 	encode_putfh(xdr, args->dst_fh, &hdr);
 	encode_copy(xdr, args, &hdr);
 	encode_copy_commit(xdr, args, &hdr);
+	encode_nops(&hdr);
+}
+
+/*
+ * Encode OFFLOAD_CANEL request
+ */
+static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
+					struct xdr_stream *xdr,
+					const void *data)
+{
+	const struct nfs42_offload_status_args *args = data;
+	struct compound_hdr hdr = {
+		.minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
+	};
+
+	encode_compound_hdr(xdr, req, &hdr);
+	encode_sequence(xdr, &args->osa_seq_args, &hdr);
+	encode_putfh(xdr, args->osa_src_fh, &hdr);
+	encode_offload_cancel(xdr, args, &hdr);
 	encode_nops(&hdr);
 }
 
···
 	return decode_copy_requirements(xdr, res);
 }
 
+static int decode_offload_cancel(struct xdr_stream *xdr,
+				 struct nfs42_offload_status_res *res)
+{
+	return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
+}
+
 static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 {
 	return decode_op_hdr(xdr, OP_DEALLOCATE);
···
 	if (status)
 		goto out;
 	status = decode_commit(xdr, &res->commit_res);
+out:
+	return status;
+}
+
+/*
+ * Decode OFFLOAD_CANCEL response
+ */
+static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst *rqstp,
+				       struct xdr_stream *xdr,
+				       void *data)
+{
+	struct nfs42_offload_status_res *res = data;
+	struct compound_hdr hdr;
+	int status;
+
+	status = decode_compound_hdr(xdr, &hdr);
+	if (status)
+		goto out;
+	status = decode_sequence(xdr, &res->osr_seq_res, rqstp);
+	if (status)
+		goto out;
+	status = decode_putfh(xdr);
+	if (status)
+		goto out;
+	status = decode_offload_cancel(xdr, res);
+
 out:
 	return status;
 }

fs/nfs/nfs4proc.c

···
 		| NFS_CAP_LGOPEN
 		| NFS_CAP_ALLOCATE
 		| NFS_CAP_COPY
+		| NFS_CAP_OFFLOAD_CANCEL
 		| NFS_CAP_DEALLOCATE
 		| NFS_CAP_SEEK
 		| NFS_CAP_LAYOUTSTATS

fs/nfs/nfs4xdr.c

···
 	PROC42(LAYOUTSTATS,	enc_layoutstats,	dec_layoutstats),
 	PROC42(CLONE,		enc_clone,		dec_clone),
 	PROC42(COPY,		enc_copy,		dec_copy),
+	PROC42(OFFLOAD_CANCEL,	enc_offload_cancel,	dec_offload_cancel),
 	PROC(LOOKUPP,		enc_lookupp,		dec_lookupp),
 };
 

include/linux/nfs4.h

···
 	NFSPROC4_CLNT_LAYOUTSTATS,
 	NFSPROC4_CLNT_CLONE,
 	NFSPROC4_CLNT_COPY,
+	NFSPROC4_CLNT_OFFLOAD_CANCEL,
 
 	NFSPROC4_CLNT_LOOKUPP,
 };

include/linux/nfs_fs_sb.h

···
 #define NFS_CAP_LAYOUTSTATS	(1U << 22)
 #define NFS_CAP_CLONE		(1U << 23)
 #define NFS_CAP_COPY		(1U << 24)
+#define NFS_CAP_OFFLOAD_CANCEL	(1U << 25)
 
 #endif

include/linux/nfs_xdr.h

···
 	struct nfs_commitres		commit_res;
 };
 
+struct nfs42_offload_status_args {
+	struct nfs4_sequence_args	osa_seq_args;
+	struct nfs_fh			*osa_src_fh;
+	nfs4_stateid			osa_stateid;
+};
+
+struct nfs42_offload_status_res {
+	struct nfs4_sequence_res	osr_seq_res;
+	uint64_t			osr_count;
+	int				osr_status;
+};
+
 struct nfs42_seek_args {
 	struct nfs4_sequence_args	seq_args;