[mirror_ubuntu-zesty-kernel.git] / fs / nfs / nfs42xdr.c

/*
 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
 */
#ifndef __LINUX_FS_NFS_NFS4_2XDR_H
#define __LINUX_FS_NFS_NFS4_2XDR_H

#include "nfs42.h"

#define encode_fallocate_maxsz		(encode_stateid_maxsz + \
					 2 /* offset */ + \
					 2 /* length */)
#define NFS42_WRITE_RES_SIZE		(1 /* wr_callback_id size */ +\
					 XDR_QUADLEN(NFS4_STATEID_SIZE) + \
					 2 /* wr_count */ + \
					 1 /* wr_committed */ + \
					 XDR_QUADLEN(NFS4_VERIFIER_SIZE))
#define encode_allocate_maxsz		(op_encode_hdr_maxsz + \
					 encode_fallocate_maxsz)
#define decode_allocate_maxsz		(op_decode_hdr_maxsz)
#define encode_copy_maxsz		(op_encode_hdr_maxsz +          \
					 XDR_QUADLEN(NFS4_STATEID_SIZE) + \
					 XDR_QUADLEN(NFS4_STATEID_SIZE) + \
					 2 + 2 + 2 + 1 + 1 + 1)
#define decode_copy_maxsz		(op_decode_hdr_maxsz + \
					 NFS42_WRITE_RES_SIZE + \
					 1 /* cr_consecutive */ + \
					 1 /* cr_synchronous */)
#define encode_deallocate_maxsz		(op_encode_hdr_maxsz + \
					 encode_fallocate_maxsz)
#define decode_deallocate_maxsz		(op_decode_hdr_maxsz)
#define encode_seek_maxsz		(op_encode_hdr_maxsz + \
					 encode_stateid_maxsz + \
					 2 /* offset */ + \
					 1 /* whence */)
#define decode_seek_maxsz		(op_decode_hdr_maxsz + \
					 1 /* eof */ + \
					 1 /* whence */ + \
					 2 /* offset */ + \
					 2 /* length */)
#define encode_io_info_maxsz		4
#define encode_layoutstats_maxsz	(op_decode_hdr_maxsz + \
					2 /* offset */ + \
					2 /* length */ + \
					encode_stateid_maxsz + \
					encode_io_info_maxsz + \
					encode_io_info_maxsz + \
					1 /* opaque devaddr4 length */ + \
					XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
#define decode_layoutstats_maxsz	(op_decode_hdr_maxsz)
#define encode_clone_maxsz		(encode_stateid_maxsz + \
					encode_stateid_maxsz + \
					2 /* src offset */ + \
					2 /* dst offset */ + \
					2 /* count */)
#define decode_clone_maxsz		(op_decode_hdr_maxsz)

#define NFS4_enc_allocate_sz		(compound_encode_hdr_maxsz + \
					 encode_putfh_maxsz + \
					 encode_allocate_maxsz + \
					 encode_getattr_maxsz)
#define NFS4_dec_allocate_sz		(compound_decode_hdr_maxsz + \
					 decode_putfh_maxsz + \
					 decode_allocate_maxsz + \
					 decode_getattr_maxsz)
#define NFS4_enc_copy_sz		(compound_encode_hdr_maxsz + \
					 encode_putfh_maxsz + \
					 encode_savefh_maxsz + \
					 encode_putfh_maxsz + \
					 encode_copy_maxsz)
#define NFS4_dec_copy_sz		(compound_decode_hdr_maxsz + \
					 decode_putfh_maxsz + \
					 decode_savefh_maxsz + \
					 decode_putfh_maxsz + \
					 decode_copy_maxsz)
#define NFS4_enc_deallocate_sz		(compound_encode_hdr_maxsz + \
					 encode_putfh_maxsz + \
					 encode_deallocate_maxsz + \
					 encode_getattr_maxsz)
#define NFS4_dec_deallocate_sz		(compound_decode_hdr_maxsz + \
					 decode_putfh_maxsz + \
					 decode_deallocate_maxsz + \
					 decode_getattr_maxsz)
#define NFS4_enc_seek_sz		(compound_encode_hdr_maxsz + \
					 encode_putfh_maxsz + \
					 encode_seek_maxsz)
#define NFS4_dec_seek_sz		(compound_decode_hdr_maxsz + \
					 decode_putfh_maxsz + \
					 decode_seek_maxsz)
#define NFS4_enc_layoutstats_sz		(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putfh_maxsz + \
					 PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
#define NFS4_dec_layoutstats_sz		(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putfh_maxsz + \
					 PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
#define NFS4_enc_clone_sz		(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putfh_maxsz + \
					 encode_savefh_maxsz + \
					 encode_putfh_maxsz + \
					 encode_clone_maxsz + \
					 encode_getattr_maxsz)
#define NFS4_dec_clone_sz		(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putfh_maxsz + \
					 decode_savefh_maxsz + \
					 decode_putfh_maxsz + \
					 decode_clone_maxsz + \
					 decode_getattr_maxsz)

static void encode_fallocate(struct xdr_stream *xdr,
			     struct nfs42_falloc_args *args)
{
	encode_nfs4_stateid(xdr, &args->falloc_stateid);
	encode_uint64(xdr, args->falloc_offset);
	encode_uint64(xdr, args->falloc_length);
}

static void encode_allocate(struct xdr_stream *xdr,
			    struct nfs42_falloc_args *args,
			    struct compound_hdr *hdr)
{
	encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
	encode_fallocate(xdr, args);
}

static void encode_copy(struct xdr_stream *xdr,
			struct nfs42_copy_args *args,
			struct compound_hdr *hdr)
{
	encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
	encode_nfs4_stateid(xdr, &args->src_stateid);
	encode_nfs4_stateid(xdr, &args->dst_stateid);

	encode_uint64(xdr, args->src_pos);
	encode_uint64(xdr, args->dst_pos);
	encode_uint64(xdr, args->count);

	encode_uint32(xdr, 1); /* consecutive = true */
	encode_uint32(xdr, 1); /* synchronous = true */
	encode_uint32(xdr, 0); /* src server list */
}

static void encode_deallocate(struct xdr_stream *xdr,
			      struct nfs42_falloc_args *args,
			      struct compound_hdr *hdr)
{
	encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
	encode_fallocate(xdr, args);
}

static void encode_seek(struct xdr_stream *xdr,
			struct nfs42_seek_args *args,
			struct compound_hdr *hdr)
{
	encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
	encode_nfs4_stateid(xdr, &args->sa_stateid);
	encode_uint64(xdr, args->sa_offset);
	encode_uint32(xdr, args->sa_what);
}

static void encode_layoutstats(struct xdr_stream *xdr,
			       struct nfs42_layoutstat_args *args,
			       struct nfs42_layoutstat_devinfo *devinfo,
			       struct compound_hdr *hdr)
{
	__be32 *p;

	encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
	p = reserve_space(xdr, 8 + 8);
	p = xdr_encode_hyper(p, devinfo->offset);
	p = xdr_encode_hyper(p, devinfo->length);
	encode_nfs4_stateid(xdr, &args->stateid);
	p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
	p = xdr_encode_hyper(p, devinfo->read_count);
	p = xdr_encode_hyper(p, devinfo->read_bytes);
	p = xdr_encode_hyper(p, devinfo->write_count);
	p = xdr_encode_hyper(p, devinfo->write_bytes);
	p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
			NFS4_DEVICEID4_SIZE);
	/* Encode layoutupdate4 */
	*p++ = cpu_to_be32(devinfo->layout_type);
	if (devinfo->ld_private.ops)
		devinfo->ld_private.ops->encode(xdr, args,
				&devinfo->ld_private);
	else
		encode_uint32(xdr, 0);
}

static void encode_clone(struct xdr_stream *xdr,
			 struct nfs42_clone_args *args,
			 struct compound_hdr *hdr)
{
	__be32 *p;

	encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
	encode_nfs4_stateid(xdr, &args->src_stateid);
	encode_nfs4_stateid(xdr, &args->dst_stateid);
	p = reserve_space(xdr, 3*8);
	p = xdr_encode_hyper(p, args->src_offset);
	p = xdr_encode_hyper(p, args->dst_offset);
	xdr_encode_hyper(p, args->count);
}

/*
 * Encode ALLOCATE request
 */
static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
				  struct xdr_stream *xdr,
				  struct nfs42_falloc_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->falloc_fh, &hdr);
	encode_allocate(xdr, args, &hdr);
	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
	encode_nops(&hdr);
}

/*
 * Encode COPY request
 */
static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
			      struct xdr_stream *xdr,
			      struct nfs42_copy_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->src_fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->dst_fh, &hdr);
	encode_copy(xdr, args, &hdr);
	encode_nops(&hdr);
}

/*
 * Encode DEALLOCATE request
 */
static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
				    struct xdr_stream *xdr,
				    struct nfs42_falloc_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->falloc_fh, &hdr);
	encode_deallocate(xdr, args, &hdr);
	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
	encode_nops(&hdr);
}

/*
 * Encode SEEK request
 */
static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
			      struct xdr_stream *xdr,
			      struct nfs42_seek_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->sa_fh, &hdr);
	encode_seek(xdr, args, &hdr);
	encode_nops(&hdr);
}

/*
 * Encode LAYOUTSTATS request
 */
static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs42_layoutstat_args *args)
{
	int i;

	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	for (i = 0; i < args->num_dev; i++)
		encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
	encode_nops(&hdr);
}

/*
 * Encode CLONE request
 */
static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
			       struct xdr_stream *xdr,
			       struct nfs42_clone_args *args)
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->src_fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->dst_fh, &hdr);
	encode_clone(xdr, args, &hdr);
	encode_getfattr(xdr, args->dst_bitmask, &hdr);
	encode_nops(&hdr);
}

static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
{
	return decode_op_hdr(xdr, OP_ALLOCATE);
}

static int decode_write_response(struct xdr_stream *xdr,
				 struct nfs42_write_res *res)
{
	__be32 *p;

	p = xdr_inline_decode(xdr, 4 + 8 + 4);
	if (unlikely(!p))
		goto out_overflow;

	/*
	 * We never use asynchronous mode, so warn if a server returns
	 * a stateid.
	 */
	if (unlikely(*p != 0)) {
		pr_err_once("%s: server has set unrequested "
				"asynchronous mode\n", __func__);
		return -EREMOTEIO;
	}
	p++;
	p = xdr_decode_hyper(p, &res->count);
	res->verifier.committed = be32_to_cpup(p);
	return decode_verifier(xdr, &res->verifier.verifier);

out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_copy_requirements(struct xdr_stream *xdr,
				    struct nfs42_copy_res *res) {
	__be32 *p;

	p = xdr_inline_decode(xdr, 4 + 4);
	if (unlikely(!p))
		goto out_overflow;

	res->consecutive = be32_to_cpup(p++);
	res->synchronous = be32_to_cpup(p++);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_copy(struct xdr_stream *xdr, struct nfs42_copy_res *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_COPY);
	if (status == NFS4ERR_OFFLOAD_NO_REQS) {
		status = decode_copy_requirements(xdr, res);
		if (status)
			return status;
		return NFS4ERR_OFFLOAD_NO_REQS;
	} else if (status)
		return status;

	status = decode_write_response(xdr, &res->write_res);
	if (status)
		return status;

	return decode_copy_requirements(xdr, res);
}

static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
{
	return decode_op_hdr(xdr, OP_DEALLOCATE);
}

static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
{
	int status;
	__be32 *p;

	status = decode_op_hdr(xdr, OP_SEEK);
	if (status)
		return status;

	p = xdr_inline_decode(xdr, 4 + 8);
	if (unlikely(!p))
		goto out_overflow;

	res->sr_eof = be32_to_cpup(p++);
	p = xdr_decode_hyper(p, &res->sr_offset);
	return 0;

out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_layoutstats(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_LAYOUTSTATS);
}

static int decode_clone(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_CLONE);
}

/*
 * Decode ALLOCATE request
 */
static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
				 struct nfs42_falloc_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_allocate(xdr, res);
	if (status)
		goto out;
	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
out:
	return status;
}

/*
 * Decode COPY response
 */
static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
			     struct xdr_stream *xdr,
			     struct nfs42_copy_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_savefh(xdr);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_copy(xdr, res);
out:
	return status;
}

/*
 * Decode DEALLOCATE request
 */
static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
				   struct xdr_stream *xdr,
				   struct nfs42_falloc_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_deallocate(xdr, res);
	if (status)
		goto out;
	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
out:
	return status;
}

/*
 * Decode SEEK request
 */
static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
			     struct xdr_stream *xdr,
			     struct nfs42_seek_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_seek(xdr, res);
out:
	return status;
}

/*
 * Decode LAYOUTSTATS request
 */
static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs42_layoutstat_res *res)
{
	struct compound_hdr hdr;
	int status, i;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	for (i = 0; i < res->num_dev; i++) {
		status = decode_layoutstats(xdr);
		if (status)
			goto out;
	}
out:
	res->rpc_status = status;
	return status;
}

/*
 * Decode CLONE request
 */
static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
			      struct xdr_stream *xdr,
			      struct nfs42_clone_res *res)
{
	struct compound_hdr hdr;
	int status;

	status = decode_compound_hdr(xdr, &hdr);
	if (status)
		goto out;
	status = decode_sequence(xdr, &res->seq_res, rqstp);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_savefh(xdr);
	if (status)
		goto out;
	status = decode_putfh(xdr);
	if (status)
		goto out;
	status = decode_clone(xdr);
	if (status)
		goto out;
	status = decode_getfattr(xdr, res->dst_fattr, res->server);

out:
	res->rpc_status = status;
	return status;
}

#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */
Commit	Line	Data
1c6dcbe5 AS	1	/*
	2	* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
	3	*/
	4	#ifndef __LINUX_FS_NFS_NFS4_2XDR_H
	5	#define __LINUX_FS_NFS_NFS4_2XDR_H
	6
be3a5d23 TM	7	#include "nfs42.h"
be3a5d23 TM	8
f4ac1674 AS	9	#define encode_fallocate_maxsz (encode_stateid_maxsz + \
	10	2 /* offset */ + \
	11	2 /* length */)
2e72448b AS	12	#define NFS42_WRITE_RES_SIZE (1 /* wr_callback_id size */ +\
	13	XDR_QUADLEN(NFS4_STATEID_SIZE) + \
	14	2 /* wr_count */ + \
	15	1 /* wr_committed */ + \
	16	XDR_QUADLEN(NFS4_VERIFIER_SIZE))
f4ac1674 AS	17	#define encode_allocate_maxsz (op_encode_hdr_maxsz + \
	18	encode_fallocate_maxsz)
	19	#define decode_allocate_maxsz (op_decode_hdr_maxsz)
2e72448b AS	20	#define encode_copy_maxsz (op_encode_hdr_maxsz + \
	21	XDR_QUADLEN(NFS4_STATEID_SIZE) + \
	22	XDR_QUADLEN(NFS4_STATEID_SIZE) + \
	23	2 + 2 + 2 + 1 + 1 + 1)
	24	#define decode_copy_maxsz (op_decode_hdr_maxsz + \
	25	NFS42_WRITE_RES_SIZE + \
	26	1 /* cr_consecutive */ + \
	27	1 /* cr_synchronous */)
624bd5b7 AS	28	#define encode_deallocate_maxsz (op_encode_hdr_maxsz + \
	29	encode_fallocate_maxsz)
	30	#define decode_deallocate_maxsz (op_decode_hdr_maxsz)
1c6dcbe5 AS	31	#define encode_seek_maxsz (op_encode_hdr_maxsz + \
	32	encode_stateid_maxsz + \
	33	2 /* offset */ + \
	34	1 /* whence */)
	35	#define decode_seek_maxsz (op_decode_hdr_maxsz + \
	36	1 /* eof */ + \
	37	1 /* whence */ + \
	38	2 /* offset */ + \
	39	2 /* length */)
be3a5d23 TM	40	#define encode_io_info_maxsz 4
	41	#define encode_layoutstats_maxsz (op_decode_hdr_maxsz + \
	42	2 /* offset */ + \
	43	2 /* length */ + \
	44	encode_stateid_maxsz + \
	45	encode_io_info_maxsz + \
	46	encode_io_info_maxsz + \
	47	1 /* opaque devaddr4 length */ + \
	48	XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
	49	#define decode_layoutstats_maxsz (op_decode_hdr_maxsz)
36022770 PT	50	#define encode_clone_maxsz (encode_stateid_maxsz + \
	51	encode_stateid_maxsz + \
	52	2 /* src offset */ + \
	53	2 /* dst offset */ + \
	54	2 /* count */)
	55	#define decode_clone_maxsz (op_decode_hdr_maxsz)
1c6dcbe5	56
f4ac1674 AS	57	#define NFS4_enc_allocate_sz (compound_encode_hdr_maxsz + \
f4ac1674 AS	58	encode_putfh_maxsz + \
9a51940b AS	59	encode_allocate_maxsz + \
9a51940b AS	60	encode_getattr_maxsz)
f4ac1674 AS	61	#define NFS4_dec_allocate_sz (compound_decode_hdr_maxsz + \
f4ac1674 AS	62	decode_putfh_maxsz + \
9a51940b AS	63	decode_allocate_maxsz + \
9a51940b AS	64	decode_getattr_maxsz)
2e72448b AS	65	#define NFS4_enc_copy_sz (compound_encode_hdr_maxsz + \
	66	encode_putfh_maxsz + \
	67	encode_savefh_maxsz + \
	68	encode_putfh_maxsz + \
	69	encode_copy_maxsz)
	70	#define NFS4_dec_copy_sz (compound_decode_hdr_maxsz + \
	71	decode_putfh_maxsz + \
	72	decode_savefh_maxsz + \
	73	decode_putfh_maxsz + \
	74	decode_copy_maxsz)
624bd5b7 AS	75	#define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \
624bd5b7 AS	76	encode_putfh_maxsz + \
9a51940b AS	77	encode_deallocate_maxsz + \
9a51940b AS	78	encode_getattr_maxsz)
624bd5b7 AS	79	#define NFS4_dec_deallocate_sz (compound_decode_hdr_maxsz + \
624bd5b7 AS	80	decode_putfh_maxsz + \
9a51940b AS	81	decode_deallocate_maxsz + \
9a51940b AS	82	decode_getattr_maxsz)
1c6dcbe5 AS	83	#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \
	84	encode_putfh_maxsz + \
	85	encode_seek_maxsz)
	86	#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \
	87	decode_putfh_maxsz + \
	88	decode_seek_maxsz)
be3a5d23 TM	89	#define NFS4_enc_layoutstats_sz (compound_encode_hdr_maxsz + \
	90	encode_sequence_maxsz + \
	91	encode_putfh_maxsz + \
	92	PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
	93	#define NFS4_dec_layoutstats_sz (compound_decode_hdr_maxsz + \
	94	decode_sequence_maxsz + \
	95	decode_putfh_maxsz + \
	96	PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
36022770 PT	97	#define NFS4_enc_clone_sz (compound_encode_hdr_maxsz + \
	98	encode_sequence_maxsz + \
	99	encode_putfh_maxsz + \
	100	encode_savefh_maxsz + \
	101	encode_putfh_maxsz + \
	102	encode_clone_maxsz + \
	103	encode_getattr_maxsz)
	104	#define NFS4_dec_clone_sz (compound_decode_hdr_maxsz + \
	105	decode_sequence_maxsz + \
	106	decode_putfh_maxsz + \
	107	decode_savefh_maxsz + \
	108	decode_putfh_maxsz + \
	109	decode_clone_maxsz + \
	110	decode_getattr_maxsz)
1c6dcbe5	111
f4ac1674 AS	112	static void encode_fallocate(struct xdr_stream *xdr,
	113	struct nfs42_falloc_args *args)
	114	{
	115	encode_nfs4_stateid(xdr, &args->falloc_stateid);
	116	encode_uint64(xdr, args->falloc_offset);
	117	encode_uint64(xdr, args->falloc_length);
	118	}
	119
	120	static void encode_allocate(struct xdr_stream *xdr,
	121	struct nfs42_falloc_args *args,
	122	struct compound_hdr *hdr)
	123	{
	124	encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
	125	encode_fallocate(xdr, args);
	126	}
	127
2e72448b AS	128	static void encode_copy(struct xdr_stream *xdr,
	129	struct nfs42_copy_args *args,
	130	struct compound_hdr *hdr)
	131	{
	132	encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
	133	encode_nfs4_stateid(xdr, &args->src_stateid);
	134	encode_nfs4_stateid(xdr, &args->dst_stateid);
	135
	136	encode_uint64(xdr, args->src_pos);
	137	encode_uint64(xdr, args->dst_pos);
	138	encode_uint64(xdr, args->count);
	139
	140	encode_uint32(xdr, 1); /* consecutive = true */
	141	encode_uint32(xdr, 1); /* synchronous = true */
	142	encode_uint32(xdr, 0); /* src server list */
	143	}
	144
624bd5b7 AS	145	static void encode_deallocate(struct xdr_stream *xdr,
	146	struct nfs42_falloc_args *args,
	147	struct compound_hdr *hdr)
	148	{
	149	encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
	150	encode_fallocate(xdr, args);
	151	}
	152
1c6dcbe5 AS	153	static void encode_seek(struct xdr_stream *xdr,
	154	struct nfs42_seek_args *args,
	155	struct compound_hdr *hdr)
	156	{
	157	encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
	158	encode_nfs4_stateid(xdr, &args->sa_stateid);
	159	encode_uint64(xdr, args->sa_offset);
	160	encode_uint32(xdr, args->sa_what);
	161	}
	162
be3a5d23 TM	163	static void encode_layoutstats(struct xdr_stream *xdr,
	164	struct nfs42_layoutstat_args *args,
	165	struct nfs42_layoutstat_devinfo *devinfo,
	166	struct compound_hdr *hdr)
	167	{
	168	__be32 *p;
	169
	170	encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
	171	p = reserve_space(xdr, 8 + 8);
	172	p = xdr_encode_hyper(p, devinfo->offset);
	173	p = xdr_encode_hyper(p, devinfo->length);
	174	encode_nfs4_stateid(xdr, &args->stateid);
	175	p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
	176	p = xdr_encode_hyper(p, devinfo->read_count);
	177	p = xdr_encode_hyper(p, devinfo->read_bytes);
	178	p = xdr_encode_hyper(p, devinfo->write_count);
	179	p = xdr_encode_hyper(p, devinfo->write_bytes);
	180	p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
	181	NFS4_DEVICEID4_SIZE);
	182	/* Encode layoutupdate4 */
	183	*p++ = cpu_to_be32(devinfo->layout_type);
422c93c8 TM	184	if (devinfo->ld_private.ops)
	185	devinfo->ld_private.ops->encode(xdr, args,
	186	&devinfo->ld_private);
be3a5d23 TM	187	else
	188	encode_uint32(xdr, 0);
	189	}
	190
36022770 PT	191	static void encode_clone(struct xdr_stream *xdr,
	192	struct nfs42_clone_args *args,
	193	struct compound_hdr *hdr)
	194	{
	195	__be32 *p;
	196
	197	encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
	198	encode_nfs4_stateid(xdr, &args->src_stateid);
	199	encode_nfs4_stateid(xdr, &args->dst_stateid);
	200	p = reserve_space(xdr, 3*8);
	201	p = xdr_encode_hyper(p, args->src_offset);
	202	p = xdr_encode_hyper(p, args->dst_offset);
	203	xdr_encode_hyper(p, args->count);
	204	}
	205
f4ac1674 AS	206	/*
	207	* Encode ALLOCATE request
	208	*/
	209	static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
	210	struct xdr_stream *xdr,
	211	struct nfs42_falloc_args *args)
	212	{
	213	struct compound_hdr hdr = {
	214	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	215	};
	216
	217	encode_compound_hdr(xdr, req, &hdr);
	218	encode_sequence(xdr, &args->seq_args, &hdr);
	219	encode_putfh(xdr, args->falloc_fh, &hdr);
	220	encode_allocate(xdr, args, &hdr);
9a51940b	221	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
f4ac1674 AS	222	encode_nops(&hdr);
	223	}
	224
2e72448b AS	225	/*
	226	* Encode COPY request
	227	*/
	228	static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
	229	struct xdr_stream *xdr,
	230	struct nfs42_copy_args *args)
	231	{
	232	struct compound_hdr hdr = {
	233	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	234	};
	235
	236	encode_compound_hdr(xdr, req, &hdr);
	237	encode_sequence(xdr, &args->seq_args, &hdr);
	238	encode_putfh(xdr, args->src_fh, &hdr);
	239	encode_savefh(xdr, &hdr);
	240	encode_putfh(xdr, args->dst_fh, &hdr);
	241	encode_copy(xdr, args, &hdr);
	242	encode_nops(&hdr);
	243	}
	244
624bd5b7 AS	245	/*
	246	* Encode DEALLOCATE request
	247	*/
	248	static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
	249	struct xdr_stream *xdr,
	250	struct nfs42_falloc_args *args)
	251	{
	252	struct compound_hdr hdr = {
	253	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	254	};
	255
	256	encode_compound_hdr(xdr, req, &hdr);
	257	encode_sequence(xdr, &args->seq_args, &hdr);
	258	encode_putfh(xdr, args->falloc_fh, &hdr);
	259	encode_deallocate(xdr, args, &hdr);
9a51940b	260	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
624bd5b7 AS	261	encode_nops(&hdr);
	262	}
	263
1c6dcbe5 AS	264	/*
	265	* Encode SEEK request
	266	*/
	267	static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
	268	struct xdr_stream *xdr,
	269	struct nfs42_seek_args *args)
	270	{
	271	struct compound_hdr hdr = {
	272	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	273	};
	274
	275	encode_compound_hdr(xdr, req, &hdr);
	276	encode_sequence(xdr, &args->seq_args, &hdr);
	277	encode_putfh(xdr, args->sa_fh, &hdr);
	278	encode_seek(xdr, args, &hdr);
	279	encode_nops(&hdr);
	280	}
	281
be3a5d23 TM	282	/*
	283	* Encode LAYOUTSTATS request
	284	*/
	285	static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
	286	struct xdr_stream *xdr,
	287	struct nfs42_layoutstat_args *args)
	288	{
	289	int i;
	290
	291	struct compound_hdr hdr = {
	292	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	293	};
	294
	295	encode_compound_hdr(xdr, req, &hdr);
	296	encode_sequence(xdr, &args->seq_args, &hdr);
	297	encode_putfh(xdr, args->fh, &hdr);
	298	WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	299	for (i = 0; i < args->num_dev; i++)
	300	encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
	301	encode_nops(&hdr);
	302	}
	303
36022770 PT	304	/*
	305	* Encode CLONE request
	306	*/
	307	static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
	308	struct xdr_stream *xdr,
	309	struct nfs42_clone_args *args)
	310	{
	311	struct compound_hdr hdr = {
	312	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	313	};
	314
	315	encode_compound_hdr(xdr, req, &hdr);
	316	encode_sequence(xdr, &args->seq_args, &hdr);
	317	encode_putfh(xdr, args->src_fh, &hdr);
	318	encode_savefh(xdr, &hdr);
	319	encode_putfh(xdr, args->dst_fh, &hdr);
	320	encode_clone(xdr, args, &hdr);
	321	encode_getfattr(xdr, args->dst_bitmask, &hdr);
	322	encode_nops(&hdr);
	323	}
	324
f4ac1674 AS	325	static int decode_allocate(struct xdr_stream xdr, struct nfs42_falloc_res res)
	326	{
	327	return decode_op_hdr(xdr, OP_ALLOCATE);
	328	}
	329
2e72448b AS	330	static int decode_write_response(struct xdr_stream *xdr,
	331	struct nfs42_write_res *res)
	332	{
	333	__be32 *p;
2e72448b AS	334
	335	p = xdr_inline_decode(xdr, 4 + 8 + 4);
	336	if (unlikely(!p))
	337	goto out_overflow;
	338
6fdf339b TM	339	/*
	340	* We never use asynchronous mode, so warn if a server returns
	341	* a stateid.
	342	*/
	343	if (unlikely(*p != 0)) {
	344	pr_err_once("%s: server has set unrequested "
	345	"asynchronous mode\n", __func__);
	346	return -EREMOTEIO;
	347	}
	348	p++;
2e72448b AS	349	p = xdr_decode_hyper(p, &res->count);
	350	res->verifier.committed = be32_to_cpup(p);
	351	return decode_verifier(xdr, &res->verifier.verifier);
	352
	353	out_overflow:
	354	print_overflow_msg(__func__, xdr);
	355	return -EIO;
	356	}
	357
	358	static int decode_copy_requirements(struct xdr_stream *xdr,
	359	struct nfs42_copy_res *res) {
	360	__be32 *p;
	361
	362	p = xdr_inline_decode(xdr, 4 + 4);
	363	if (unlikely(!p))
	364	goto out_overflow;
	365
	366	res->consecutive = be32_to_cpup(p++);
	367	res->synchronous = be32_to_cpup(p++);
	368	return 0;
	369	out_overflow:
	370	print_overflow_msg(__func__, xdr);
	371	return -EIO;
	372	}
	373
	374	static int decode_copy(struct xdr_stream xdr, struct nfs42_copy_res res)
	375	{
	376	int status;
	377
	378	status = decode_op_hdr(xdr, OP_COPY);
	379	if (status == NFS4ERR_OFFLOAD_NO_REQS) {
	380	status = decode_copy_requirements(xdr, res);
	381	if (status)
	382	return status;
	383	return NFS4ERR_OFFLOAD_NO_REQS;
	384	} else if (status)
	385	return status;
	386
	387	status = decode_write_response(xdr, &res->write_res);
	388	if (status)
	389	return status;
	390
	391	return decode_copy_requirements(xdr, res);
	392	}
	393
624bd5b7 AS	394	static int decode_deallocate(struct xdr_stream xdr, struct nfs42_falloc_res res)
	395	{
	396	return decode_op_hdr(xdr, OP_DEALLOCATE);
	397	}
	398
1c6dcbe5 AS	399	static int decode_seek(struct xdr_stream xdr, struct nfs42_seek_res res)
	400	{
	401	int status;
	402	__be32 *p;
	403
	404	status = decode_op_hdr(xdr, OP_SEEK);
	405	if (status)
	406	return status;
	407
	408	p = xdr_inline_decode(xdr, 4 + 8);
	409	if (unlikely(!p))
	410	goto out_overflow;
	411
	412	res->sr_eof = be32_to_cpup(p++);
	413	p = xdr_decode_hyper(p, &res->sr_offset);
	414	return 0;
	415
	416	out_overflow:
	417	print_overflow_msg(__func__, xdr);
	418	return -EIO;
	419	}
	420
19cf6335	421	static int decode_layoutstats(struct xdr_stream *xdr)
be3a5d23	422	{
da2e8127	423	return decode_op_hdr(xdr, OP_LAYOUTSTATS);
be3a5d23 TM	424	}
be3a5d23 TM	425
36022770 PT	426	static int decode_clone(struct xdr_stream *xdr)
	427	{
	428	return decode_op_hdr(xdr, OP_CLONE);
	429	}
	430
f4ac1674 AS	431	/*
	432	* Decode ALLOCATE request
	433	*/
	434	static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
	435	struct xdr_stream *xdr,
	436	struct nfs42_falloc_res *res)
	437	{
	438	struct compound_hdr hdr;
	439	int status;
	440
	441	status = decode_compound_hdr(xdr, &hdr);
	442	if (status)
	443	goto out;
	444	status = decode_sequence(xdr, &res->seq_res, rqstp);
	445	if (status)
	446	goto out;
	447	status = decode_putfh(xdr);
	448	if (status)
	449	goto out;
	450	status = decode_allocate(xdr, res);
9a51940b AS	451	if (status)
	452	goto out;
	453	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
f4ac1674 AS	454	out:
	455	return status;
	456	}
	457
2e72448b AS	458	/*
	459	* Decode COPY response
	460	*/
	461	static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
	462	struct xdr_stream *xdr,
	463	struct nfs42_copy_res *res)
	464	{
	465	struct compound_hdr hdr;
	466	int status;
	467
	468	status = decode_compound_hdr(xdr, &hdr);
	469	if (status)
	470	goto out;
	471	status = decode_sequence(xdr, &res->seq_res, rqstp);
	472	if (status)
	473	goto out;
	474	status = decode_putfh(xdr);
	475	if (status)
	476	goto out;
	477	status = decode_savefh(xdr);
	478	if (status)
	479	goto out;
	480	status = decode_putfh(xdr);
	481	if (status)
	482	goto out;
	483	status = decode_copy(xdr, res);
	484	out:
	485	return status;
	486	}
	487
624bd5b7 AS	488	/*
	489	* Decode DEALLOCATE request
	490	*/
	491	static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
	492	struct xdr_stream *xdr,
	493	struct nfs42_falloc_res *res)
	494	{
	495	struct compound_hdr hdr;
	496	int status;
	497
	498	status = decode_compound_hdr(xdr, &hdr);
	499	if (status)
	500	goto out;
	501	status = decode_sequence(xdr, &res->seq_res, rqstp);
	502	if (status)
	503	goto out;
	504	status = decode_putfh(xdr);
	505	if (status)
	506	goto out;
	507	status = decode_deallocate(xdr, res);
9a51940b AS	508	if (status)
	509	goto out;
	510	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
624bd5b7 AS	511	out:
	512	return status;
	513	}
	514
1c6dcbe5 AS	515	/*
	516	* Decode SEEK request
	517	*/
	518	static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
	519	struct xdr_stream *xdr,
	520	struct nfs42_seek_res *res)
	521	{
	522	struct compound_hdr hdr;
	523	int status;
	524
	525	status = decode_compound_hdr(xdr, &hdr);
	526	if (status)
	527	goto out;
	528	status = decode_sequence(xdr, &res->seq_res, rqstp);
	529	if (status)
	530	goto out;
	531	status = decode_putfh(xdr);
	532	if (status)
	533	goto out;
	534	status = decode_seek(xdr, res);
	535	out:
	536	return status;
	537	}
be3a5d23 TM	538
	539	/*
	540	* Decode LAYOUTSTATS request
	541	*/
	542	static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
	543	struct xdr_stream *xdr,
	544	struct nfs42_layoutstat_res *res)
	545	{
	546	struct compound_hdr hdr;
	547	int status, i;
	548
	549	status = decode_compound_hdr(xdr, &hdr);
	550	if (status)
	551	goto out;
	552	status = decode_sequence(xdr, &res->seq_res, rqstp);
	553	if (status)
	554	goto out;
	555	status = decode_putfh(xdr);
	556	if (status)
	557	goto out;
	558	WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	559	for (i = 0; i < res->num_dev; i++) {
19cf6335	560	status = decode_layoutstats(xdr);
be3a5d23 TM	561	if (status)
	562	goto out;
	563	}
	564	out:
	565	res->rpc_status = status;
	566	return status;
	567	}
	568
36022770 PT	569	/*
	570	* Decode CLONE request
	571	*/
	572	static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
	573	struct xdr_stream *xdr,
	574	struct nfs42_clone_res *res)
	575	{
	576	struct compound_hdr hdr;
	577	int status;
	578
	579	status = decode_compound_hdr(xdr, &hdr);
	580	if (status)
	581	goto out;
	582	status = decode_sequence(xdr, &res->seq_res, rqstp);
	583	if (status)
	584	goto out;
	585	status = decode_putfh(xdr);
	586	if (status)
	587	goto out;
	588	status = decode_savefh(xdr);
	589	if (status)
	590	goto out;
	591	status = decode_putfh(xdr);
	592	if (status)
	593	goto out;
	594	status = decode_clone(xdr);
	595	if (status)
	596	goto out;
	597	status = decode_getfattr(xdr, res->dst_fattr, res->server);
	598
	599	out:
	600	res->rpc_status = status;
	601	return status;
	602	}
	603
1c6dcbe5	604	#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */