[thirdparty/linux.git] / fs / nfs / nfs42xdr.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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 + \
					 encode_commit_maxsz)
#define NFS4_dec_copy_sz		(compound_decode_hdr_maxsz + \
					 decode_putfh_maxsz + \
					 decode_savefh_maxsz + \
					 decode_putfh_maxsz + \
					 decode_copy_maxsz + \
					 decode_commit_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,
			     const 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,
			    const 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,
			const 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,
			      const 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,
			const 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,
			       const 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,
			 const 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,
				  const void *data)
{
	const struct nfs42_falloc_args *args = data;
	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);
}

static void encode_copy_commit(struct xdr_stream *xdr,
			  const struct nfs42_copy_args *args,
			  struct compound_hdr *hdr)
{
	__be32 *p;

	encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
	p = reserve_space(xdr, 12);
	p = xdr_encode_hyper(p, args->dst_pos);
	*p = cpu_to_be32(args->count);
}

/*
 * Encode COPY request
 */
static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
			      struct xdr_stream *xdr,
			      const void *data)
{
	const struct nfs42_copy_args *args = data;
	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_copy_commit(xdr, args, &hdr);
	encode_nops(&hdr);
}

/*
 * Encode DEALLOCATE request
 */
static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
				    struct xdr_stream *xdr,
				    const void *data)
{
	const struct nfs42_falloc_args *args = data;
	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,
			      const void *data)
{
	const struct nfs42_seek_args *args = data;
	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,
				     const void *data)
{
	const struct nfs42_layoutstat_args *args = data;
	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,
			       const void *data)
{
	const struct nfs42_clone_args *args = data;
	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,
				 void *data)
{
	struct nfs42_falloc_res *res = data;
	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,
			     void *data)
{
	struct nfs42_copy_res *res = data;
	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);
	if (status)
		goto out;
	status = decode_commit(xdr, &res->commit_res);
out:
	return status;
}

/*
 * Decode DEALLOCATE request
 */
static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
				   struct xdr_stream *xdr,
				   void *data)
{
	struct nfs42_falloc_res *res = data;
	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,
			     void *data)
{
	struct nfs42_seek_res *res = data;
	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,
				    void *data)
{
	struct nfs42_layoutstat_res *res = data;
	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,
			      void *data)
{
	struct nfs42_clone_res *res = data;
	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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1c6dcbe5 AS	2	/*
	3	* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
	4	*/
	5	#ifndef __LINUX_FS_NFS_NFS4_2XDR_H
	6	#define __LINUX_FS_NFS_NFS4_2XDR_H
	7
be3a5d23 TM	8	#include "nfs42.h"
be3a5d23 TM	9
f4ac1674 AS	10	#define encode_fallocate_maxsz (encode_stateid_maxsz + \
	11	2 /* offset */ + \
	12	2 /* length */)
2e72448b AS	13	#define NFS42_WRITE_RES_SIZE (1 /* wr_callback_id size */ +\
	14	XDR_QUADLEN(NFS4_STATEID_SIZE) + \
	15	2 /* wr_count */ + \
	16	1 /* wr_committed */ + \
	17	XDR_QUADLEN(NFS4_VERIFIER_SIZE))
f4ac1674 AS	18	#define encode_allocate_maxsz (op_encode_hdr_maxsz + \
	19	encode_fallocate_maxsz)
	20	#define decode_allocate_maxsz (op_decode_hdr_maxsz)
2e72448b AS	21	#define encode_copy_maxsz (op_encode_hdr_maxsz + \
	22	XDR_QUADLEN(NFS4_STATEID_SIZE) + \
	23	XDR_QUADLEN(NFS4_STATEID_SIZE) + \
	24	2 + 2 + 2 + 1 + 1 + 1)
	25	#define decode_copy_maxsz (op_decode_hdr_maxsz + \
	26	NFS42_WRITE_RES_SIZE + \
	27	1 /* cr_consecutive */ + \
	28	1 /* cr_synchronous */)
624bd5b7 AS	29	#define encode_deallocate_maxsz (op_encode_hdr_maxsz + \
	30	encode_fallocate_maxsz)
	31	#define decode_deallocate_maxsz (op_decode_hdr_maxsz)
1c6dcbe5 AS	32	#define encode_seek_maxsz (op_encode_hdr_maxsz + \
	33	encode_stateid_maxsz + \
	34	2 /* offset */ + \
	35	1 /* whence */)
	36	#define decode_seek_maxsz (op_decode_hdr_maxsz + \
	37	1 /* eof */ + \
	38	1 /* whence */ + \
	39	2 /* offset */ + \
	40	2 /* length */)
be3a5d23 TM	41	#define encode_io_info_maxsz 4
	42	#define encode_layoutstats_maxsz (op_decode_hdr_maxsz + \
	43	2 /* offset */ + \
	44	2 /* length */ + \
	45	encode_stateid_maxsz + \
	46	encode_io_info_maxsz + \
	47	encode_io_info_maxsz + \
	48	1 /* opaque devaddr4 length */ + \
	49	XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
	50	#define decode_layoutstats_maxsz (op_decode_hdr_maxsz)
36022770 PT	51	#define encode_clone_maxsz (encode_stateid_maxsz + \
	52	encode_stateid_maxsz + \
	53	2 /* src offset */ + \
	54	2 /* dst offset */ + \
	55	2 /* count */)
	56	#define decode_clone_maxsz (op_decode_hdr_maxsz)
1c6dcbe5	57
f4ac1674 AS	58	#define NFS4_enc_allocate_sz (compound_encode_hdr_maxsz + \
f4ac1674 AS	59	encode_putfh_maxsz + \
9a51940b AS	60	encode_allocate_maxsz + \
9a51940b AS	61	encode_getattr_maxsz)
f4ac1674 AS	62	#define NFS4_dec_allocate_sz (compound_decode_hdr_maxsz + \
f4ac1674 AS	63	decode_putfh_maxsz + \
9a51940b AS	64	decode_allocate_maxsz + \
9a51940b AS	65	decode_getattr_maxsz)
2e72448b AS	66	#define NFS4_enc_copy_sz (compound_encode_hdr_maxsz + \
	67	encode_putfh_maxsz + \
	68	encode_savefh_maxsz + \
	69	encode_putfh_maxsz + \
e0926934 OK	70	encode_copy_maxsz + \
e0926934 OK	71	encode_commit_maxsz)
2e72448b AS	72	#define NFS4_dec_copy_sz (compound_decode_hdr_maxsz + \
	73	decode_putfh_maxsz + \
	74	decode_savefh_maxsz + \
	75	decode_putfh_maxsz + \
e0926934 OK	76	decode_copy_maxsz + \
e0926934 OK	77	decode_commit_maxsz)
624bd5b7 AS	78	#define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \
624bd5b7 AS	79	encode_putfh_maxsz + \
9a51940b AS	80	encode_deallocate_maxsz + \
9a51940b AS	81	encode_getattr_maxsz)
624bd5b7 AS	82	#define NFS4_dec_deallocate_sz (compound_decode_hdr_maxsz + \
624bd5b7 AS	83	decode_putfh_maxsz + \
9a51940b AS	84	decode_deallocate_maxsz + \
9a51940b AS	85	decode_getattr_maxsz)
1c6dcbe5 AS	86	#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \
	87	encode_putfh_maxsz + \
	88	encode_seek_maxsz)
	89	#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \
	90	decode_putfh_maxsz + \
	91	decode_seek_maxsz)
be3a5d23 TM	92	#define NFS4_enc_layoutstats_sz (compound_encode_hdr_maxsz + \
	93	encode_sequence_maxsz + \
	94	encode_putfh_maxsz + \
	95	PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
	96	#define NFS4_dec_layoutstats_sz (compound_decode_hdr_maxsz + \
	97	decode_sequence_maxsz + \
	98	decode_putfh_maxsz + \
	99	PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
36022770 PT	100	#define NFS4_enc_clone_sz (compound_encode_hdr_maxsz + \
	101	encode_sequence_maxsz + \
	102	encode_putfh_maxsz + \
	103	encode_savefh_maxsz + \
	104	encode_putfh_maxsz + \
	105	encode_clone_maxsz + \
	106	encode_getattr_maxsz)
	107	#define NFS4_dec_clone_sz (compound_decode_hdr_maxsz + \
	108	decode_sequence_maxsz + \
	109	decode_putfh_maxsz + \
	110	decode_savefh_maxsz + \
	111	decode_putfh_maxsz + \
	112	decode_clone_maxsz + \
	113	decode_getattr_maxsz)
1c6dcbe5	114
f4ac1674	115	static void encode_fallocate(struct xdr_stream *xdr,
0096d39b	116	const struct nfs42_falloc_args *args)
f4ac1674 AS	117	{
	118	encode_nfs4_stateid(xdr, &args->falloc_stateid);
	119	encode_uint64(xdr, args->falloc_offset);
	120	encode_uint64(xdr, args->falloc_length);
	121	}
	122
	123	static void encode_allocate(struct xdr_stream *xdr,
0096d39b	124	const struct nfs42_falloc_args *args,
f4ac1674 AS	125	struct compound_hdr *hdr)
	126	{
	127	encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
	128	encode_fallocate(xdr, args);
	129	}
	130
2e72448b	131	static void encode_copy(struct xdr_stream *xdr,
0096d39b	132	const struct nfs42_copy_args *args,
2e72448b AS	133	struct compound_hdr *hdr)
	134	{
	135	encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
	136	encode_nfs4_stateid(xdr, &args->src_stateid);
	137	encode_nfs4_stateid(xdr, &args->dst_stateid);
	138
	139	encode_uint64(xdr, args->src_pos);
	140	encode_uint64(xdr, args->dst_pos);
	141	encode_uint64(xdr, args->count);
	142
	143	encode_uint32(xdr, 1); /* consecutive = true */
	144	encode_uint32(xdr, 1); /* synchronous = true */
	145	encode_uint32(xdr, 0); /* src server list */
	146	}
	147
624bd5b7	148	static void encode_deallocate(struct xdr_stream *xdr,
0096d39b	149	const struct nfs42_falloc_args *args,
624bd5b7 AS	150	struct compound_hdr *hdr)
	151	{
	152	encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
	153	encode_fallocate(xdr, args);
	154	}
	155
1c6dcbe5	156	static void encode_seek(struct xdr_stream *xdr,
0096d39b	157	const struct nfs42_seek_args *args,
1c6dcbe5 AS	158	struct compound_hdr *hdr)
	159	{
	160	encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
	161	encode_nfs4_stateid(xdr, &args->sa_stateid);
	162	encode_uint64(xdr, args->sa_offset);
	163	encode_uint32(xdr, args->sa_what);
	164	}
	165
be3a5d23	166	static void encode_layoutstats(struct xdr_stream *xdr,
0096d39b	167	const struct nfs42_layoutstat_args *args,
be3a5d23 TM	168	struct nfs42_layoutstat_devinfo *devinfo,
	169	struct compound_hdr *hdr)
	170	{
	171	__be32 *p;
	172
	173	encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
	174	p = reserve_space(xdr, 8 + 8);
	175	p = xdr_encode_hyper(p, devinfo->offset);
	176	p = xdr_encode_hyper(p, devinfo->length);
	177	encode_nfs4_stateid(xdr, &args->stateid);
	178	p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
	179	p = xdr_encode_hyper(p, devinfo->read_count);
	180	p = xdr_encode_hyper(p, devinfo->read_bytes);
	181	p = xdr_encode_hyper(p, devinfo->write_count);
	182	p = xdr_encode_hyper(p, devinfo->write_bytes);
	183	p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
	184	NFS4_DEVICEID4_SIZE);
	185	/* Encode layoutupdate4 */
	186	*p++ = cpu_to_be32(devinfo->layout_type);
422c93c8 TM	187	if (devinfo->ld_private.ops)
	188	devinfo->ld_private.ops->encode(xdr, args,
	189	&devinfo->ld_private);
be3a5d23 TM	190	else
	191	encode_uint32(xdr, 0);
	192	}
	193
36022770	194	static void encode_clone(struct xdr_stream *xdr,
0096d39b	195	const struct nfs42_clone_args *args,
36022770 PT	196	struct compound_hdr *hdr)
	197	{
	198	__be32 *p;
	199
	200	encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
	201	encode_nfs4_stateid(xdr, &args->src_stateid);
	202	encode_nfs4_stateid(xdr, &args->dst_stateid);
	203	p = reserve_space(xdr, 3*8);
	204	p = xdr_encode_hyper(p, args->src_offset);
	205	p = xdr_encode_hyper(p, args->dst_offset);
	206	xdr_encode_hyper(p, args->count);
	207	}
	208
f4ac1674 AS	209	/*
	210	* Encode ALLOCATE request
	211	*/
	212	static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
	213	struct xdr_stream *xdr,
0096d39b	214	const void *data)
f4ac1674	215	{
0096d39b	216	const struct nfs42_falloc_args *args = data;
f4ac1674 AS	217	struct compound_hdr hdr = {
	218	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	219	};
	220
	221	encode_compound_hdr(xdr, req, &hdr);
	222	encode_sequence(xdr, &args->seq_args, &hdr);
	223	encode_putfh(xdr, args->falloc_fh, &hdr);
	224	encode_allocate(xdr, args, &hdr);
9a51940b	225	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
f4ac1674 AS	226	encode_nops(&hdr);
	227	}
	228
e0926934	229	static void encode_copy_commit(struct xdr_stream *xdr,
0096d39b	230	const struct nfs42_copy_args *args,
e0926934 OK	231	struct compound_hdr *hdr)
	232	{
	233	__be32 *p;
	234
	235	encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
	236	p = reserve_space(xdr, 12);
	237	p = xdr_encode_hyper(p, args->dst_pos);
	238	*p = cpu_to_be32(args->count);
	239	}
	240
2e72448b AS	241	/*
	242	* Encode COPY request
	243	*/
	244	static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
	245	struct xdr_stream *xdr,
0096d39b	246	const void *data)
2e72448b	247	{
0096d39b	248	const struct nfs42_copy_args *args = data;
2e72448b AS	249	struct compound_hdr hdr = {
	250	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	251	};
	252
	253	encode_compound_hdr(xdr, req, &hdr);
	254	encode_sequence(xdr, &args->seq_args, &hdr);
	255	encode_putfh(xdr, args->src_fh, &hdr);
	256	encode_savefh(xdr, &hdr);
	257	encode_putfh(xdr, args->dst_fh, &hdr);
	258	encode_copy(xdr, args, &hdr);
e0926934	259	encode_copy_commit(xdr, args, &hdr);
2e72448b AS	260	encode_nops(&hdr);
	261	}
	262
624bd5b7 AS	263	/*
	264	* Encode DEALLOCATE request
	265	*/
	266	static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
	267	struct xdr_stream *xdr,
0096d39b	268	const void *data)
624bd5b7	269	{
0096d39b	270	const struct nfs42_falloc_args *args = data;
624bd5b7 AS	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->falloc_fh, &hdr);
	278	encode_deallocate(xdr, args, &hdr);
9a51940b	279	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
624bd5b7 AS	280	encode_nops(&hdr);
	281	}
	282
1c6dcbe5 AS	283	/*
	284	* Encode SEEK request
	285	*/
	286	static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
	287	struct xdr_stream *xdr,
0096d39b	288	const void *data)
1c6dcbe5	289	{
0096d39b	290	const struct nfs42_seek_args *args = data;
1c6dcbe5 AS	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->sa_fh, &hdr);
	298	encode_seek(xdr, args, &hdr);
	299	encode_nops(&hdr);
	300	}
	301
be3a5d23 TM	302	/*
	303	* Encode LAYOUTSTATS request
	304	*/
	305	static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
	306	struct xdr_stream *xdr,
0096d39b	307	const void *data)
be3a5d23	308	{
0096d39b	309	const struct nfs42_layoutstat_args *args = data;
be3a5d23 TM	310	int i;
	311
	312	struct compound_hdr hdr = {
	313	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	314	};
	315
	316	encode_compound_hdr(xdr, req, &hdr);
	317	encode_sequence(xdr, &args->seq_args, &hdr);
	318	encode_putfh(xdr, args->fh, &hdr);
	319	WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	320	for (i = 0; i < args->num_dev; i++)
	321	encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
	322	encode_nops(&hdr);
	323	}
	324
36022770 PT	325	/*
	326	* Encode CLONE request
	327	*/
	328	static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
	329	struct xdr_stream *xdr,
0096d39b	330	const void *data)
36022770	331	{
0096d39b	332	const struct nfs42_clone_args *args = data;
36022770 PT	333	struct compound_hdr hdr = {
	334	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	335	};
	336
	337	encode_compound_hdr(xdr, req, &hdr);
	338	encode_sequence(xdr, &args->seq_args, &hdr);
	339	encode_putfh(xdr, args->src_fh, &hdr);
	340	encode_savefh(xdr, &hdr);
	341	encode_putfh(xdr, args->dst_fh, &hdr);
	342	encode_clone(xdr, args, &hdr);
	343	encode_getfattr(xdr, args->dst_bitmask, &hdr);
	344	encode_nops(&hdr);
	345	}
	346
f4ac1674 AS	347	static int decode_allocate(struct xdr_stream xdr, struct nfs42_falloc_res res)
	348	{
	349	return decode_op_hdr(xdr, OP_ALLOCATE);
	350	}
	351
2e72448b AS	352	static int decode_write_response(struct xdr_stream *xdr,
	353	struct nfs42_write_res *res)
	354	{
	355	__be32 *p;
2e72448b AS	356
	357	p = xdr_inline_decode(xdr, 4 + 8 + 4);
	358	if (unlikely(!p))
	359	goto out_overflow;
	360
6fdf339b TM	361	/*
	362	* We never use asynchronous mode, so warn if a server returns
	363	* a stateid.
	364	*/
	365	if (unlikely(*p != 0)) {
	366	pr_err_once("%s: server has set unrequested "
	367	"asynchronous mode\n", __func__);
	368	return -EREMOTEIO;
	369	}
	370	p++;
2e72448b AS	371	p = xdr_decode_hyper(p, &res->count);
	372	res->verifier.committed = be32_to_cpup(p);
	373	return decode_verifier(xdr, &res->verifier.verifier);
	374
	375	out_overflow:
	376	print_overflow_msg(__func__, xdr);
	377	return -EIO;
	378	}
	379
	380	static int decode_copy_requirements(struct xdr_stream *xdr,
	381	struct nfs42_copy_res *res) {
	382	__be32 *p;
	383
	384	p = xdr_inline_decode(xdr, 4 + 4);
	385	if (unlikely(!p))
	386	goto out_overflow;
	387
	388	res->consecutive = be32_to_cpup(p++);
	389	res->synchronous = be32_to_cpup(p++);
	390	return 0;
	391	out_overflow:
	392	print_overflow_msg(__func__, xdr);
	393	return -EIO;
	394	}
	395
	396	static int decode_copy(struct xdr_stream xdr, struct nfs42_copy_res res)
	397	{
	398	int status;
	399
	400	status = decode_op_hdr(xdr, OP_COPY);
	401	if (status == NFS4ERR_OFFLOAD_NO_REQS) {
	402	status = decode_copy_requirements(xdr, res);
	403	if (status)
	404	return status;
	405	return NFS4ERR_OFFLOAD_NO_REQS;
	406	} else if (status)
	407	return status;
	408
	409	status = decode_write_response(xdr, &res->write_res);
	410	if (status)
	411	return status;
	412
	413	return decode_copy_requirements(xdr, res);
	414	}
	415
624bd5b7 AS	416	static int decode_deallocate(struct xdr_stream xdr, struct nfs42_falloc_res res)
	417	{
	418	return decode_op_hdr(xdr, OP_DEALLOCATE);
	419	}
	420
1c6dcbe5 AS	421	static int decode_seek(struct xdr_stream xdr, struct nfs42_seek_res res)
	422	{
	423	int status;
	424	__be32 *p;
	425
	426	status = decode_op_hdr(xdr, OP_SEEK);
	427	if (status)
	428	return status;
	429
	430	p = xdr_inline_decode(xdr, 4 + 8);
	431	if (unlikely(!p))
	432	goto out_overflow;
	433
	434	res->sr_eof = be32_to_cpup(p++);
	435	p = xdr_decode_hyper(p, &res->sr_offset);
	436	return 0;
	437
	438	out_overflow:
	439	print_overflow_msg(__func__, xdr);
	440	return -EIO;
	441	}
	442
19cf6335	443	static int decode_layoutstats(struct xdr_stream *xdr)
be3a5d23	444	{
da2e8127	445	return decode_op_hdr(xdr, OP_LAYOUTSTATS);
be3a5d23 TM	446	}
be3a5d23 TM	447
36022770 PT	448	static int decode_clone(struct xdr_stream *xdr)
	449	{
	450	return decode_op_hdr(xdr, OP_CLONE);
	451	}
	452
f4ac1674 AS	453	/*
	454	* Decode ALLOCATE request
	455	*/
	456	static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
	457	struct xdr_stream *xdr,
18d9cff4	458	void *data)
f4ac1674	459	{
18d9cff4	460	struct nfs42_falloc_res *res = data;
f4ac1674 AS	461	struct compound_hdr hdr;
	462	int status;
	463
	464	status = decode_compound_hdr(xdr, &hdr);
	465	if (status)
	466	goto out;
	467	status = decode_sequence(xdr, &res->seq_res, rqstp);
	468	if (status)
	469	goto out;
	470	status = decode_putfh(xdr);
	471	if (status)
	472	goto out;
	473	status = decode_allocate(xdr, res);
9a51940b AS	474	if (status)
	475	goto out;
	476	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
f4ac1674 AS	477	out:
	478	return status;
	479	}
	480
2e72448b AS	481	/*
	482	* Decode COPY response
	483	*/
	484	static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
	485	struct xdr_stream *xdr,
18d9cff4	486	void *data)
2e72448b	487	{
18d9cff4	488	struct nfs42_copy_res *res = data;
2e72448b AS	489	struct compound_hdr hdr;
	490	int status;
	491
	492	status = decode_compound_hdr(xdr, &hdr);
	493	if (status)
	494	goto out;
	495	status = decode_sequence(xdr, &res->seq_res, rqstp);
	496	if (status)
	497	goto out;
	498	status = decode_putfh(xdr);
	499	if (status)
	500	goto out;
	501	status = decode_savefh(xdr);
	502	if (status)
	503	goto out;
	504	status = decode_putfh(xdr);
	505	if (status)
	506	goto out;
	507	status = decode_copy(xdr, res);
e0926934 OK	508	if (status)
	509	goto out;
	510	status = decode_commit(xdr, &res->commit_res);
2e72448b AS	511	out:
	512	return status;
	513	}
	514
624bd5b7 AS	515	/*
	516	* Decode DEALLOCATE request
	517	*/
	518	static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
	519	struct xdr_stream *xdr,
18d9cff4	520	void *data)
624bd5b7	521	{
18d9cff4	522	struct nfs42_falloc_res *res = data;
624bd5b7 AS	523	struct compound_hdr hdr;
	524	int status;
	525
	526	status = decode_compound_hdr(xdr, &hdr);
	527	if (status)
	528	goto out;
	529	status = decode_sequence(xdr, &res->seq_res, rqstp);
	530	if (status)
	531	goto out;
	532	status = decode_putfh(xdr);
	533	if (status)
	534	goto out;
	535	status = decode_deallocate(xdr, res);
9a51940b AS	536	if (status)
	537	goto out;
	538	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
624bd5b7 AS	539	out:
	540	return status;
	541	}
	542
1c6dcbe5 AS	543	/*
	544	* Decode SEEK request
	545	*/
	546	static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
	547	struct xdr_stream *xdr,
18d9cff4	548	void *data)
1c6dcbe5	549	{
18d9cff4	550	struct nfs42_seek_res *res = data;
1c6dcbe5 AS	551	struct compound_hdr hdr;
	552	int status;
	553
	554	status = decode_compound_hdr(xdr, &hdr);
	555	if (status)
	556	goto out;
	557	status = decode_sequence(xdr, &res->seq_res, rqstp);
	558	if (status)
	559	goto out;
	560	status = decode_putfh(xdr);
	561	if (status)
	562	goto out;
	563	status = decode_seek(xdr, res);
	564	out:
	565	return status;
	566	}
be3a5d23 TM	567
	568	/*
	569	* Decode LAYOUTSTATS request
	570	*/
	571	static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
	572	struct xdr_stream *xdr,
18d9cff4	573	void *data)
be3a5d23	574	{
18d9cff4	575	struct nfs42_layoutstat_res *res = data;
be3a5d23 TM	576	struct compound_hdr hdr;
	577	int status, i;
	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	WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	589	for (i = 0; i < res->num_dev; i++) {
19cf6335	590	status = decode_layoutstats(xdr);
be3a5d23 TM	591	if (status)
	592	goto out;
	593	}
	594	out:
	595	res->rpc_status = status;
	596	return status;
	597	}
	598
36022770 PT	599	/*
	600	* Decode CLONE request
	601	*/
	602	static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
	603	struct xdr_stream *xdr,
18d9cff4	604	void *data)
36022770	605	{
18d9cff4	606	struct nfs42_clone_res *res = data;
36022770 PT	607	struct compound_hdr hdr;
	608	int status;
	609
	610	status = decode_compound_hdr(xdr, &hdr);
	611	if (status)
	612	goto out;
	613	status = decode_sequence(xdr, &res->seq_res, rqstp);
	614	if (status)
	615	goto out;
	616	status = decode_putfh(xdr);
	617	if (status)
	618	goto out;
	619	status = decode_savefh(xdr);
	620	if (status)
	621	goto out;
	622	status = decode_putfh(xdr);
	623	if (status)
	624	goto out;
	625	status = decode_clone(xdr);
	626	if (status)
	627	goto out;
	628	status = decode_getfattr(xdr, res->dst_fattr, res->server);
	629
	630	out:
	631	res->rpc_status = status;
	632	return status;
	633	}
	634
1c6dcbe5	635	#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */