[mirror_ubuntu-artful-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 + \
					 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
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 + \
e0926934 OK	69	encode_copy_maxsz + \
e0926934 OK	70	encode_commit_maxsz)
2e72448b AS	71	#define NFS4_dec_copy_sz (compound_decode_hdr_maxsz + \
	72	decode_putfh_maxsz + \
	73	decode_savefh_maxsz + \
	74	decode_putfh_maxsz + \
e0926934 OK	75	decode_copy_maxsz + \
e0926934 OK	76	decode_commit_maxsz)
624bd5b7 AS	77	#define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \
624bd5b7 AS	78	encode_putfh_maxsz + \
9a51940b AS	79	encode_deallocate_maxsz + \
9a51940b AS	80	encode_getattr_maxsz)
624bd5b7 AS	81	#define NFS4_dec_deallocate_sz (compound_decode_hdr_maxsz + \
624bd5b7 AS	82	decode_putfh_maxsz + \
9a51940b AS	83	decode_deallocate_maxsz + \
9a51940b AS	84	decode_getattr_maxsz)
1c6dcbe5 AS	85	#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \
	86	encode_putfh_maxsz + \
	87	encode_seek_maxsz)
	88	#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \
	89	decode_putfh_maxsz + \
	90	decode_seek_maxsz)
be3a5d23 TM	91	#define NFS4_enc_layoutstats_sz (compound_encode_hdr_maxsz + \
	92	encode_sequence_maxsz + \
	93	encode_putfh_maxsz + \
	94	PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
	95	#define NFS4_dec_layoutstats_sz (compound_decode_hdr_maxsz + \
	96	decode_sequence_maxsz + \
	97	decode_putfh_maxsz + \
	98	PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
36022770 PT	99	#define NFS4_enc_clone_sz (compound_encode_hdr_maxsz + \
	100	encode_sequence_maxsz + \
	101	encode_putfh_maxsz + \
	102	encode_savefh_maxsz + \
	103	encode_putfh_maxsz + \
	104	encode_clone_maxsz + \
	105	encode_getattr_maxsz)
	106	#define NFS4_dec_clone_sz (compound_decode_hdr_maxsz + \
	107	decode_sequence_maxsz + \
	108	decode_putfh_maxsz + \
	109	decode_savefh_maxsz + \
	110	decode_putfh_maxsz + \
	111	decode_clone_maxsz + \
	112	decode_getattr_maxsz)
1c6dcbe5	113
f4ac1674	114	static void encode_fallocate(struct xdr_stream *xdr,
0096d39b	115	const struct nfs42_falloc_args *args)
f4ac1674 AS	116	{
	117	encode_nfs4_stateid(xdr, &args->falloc_stateid);
	118	encode_uint64(xdr, args->falloc_offset);
	119	encode_uint64(xdr, args->falloc_length);
	120	}
	121
	122	static void encode_allocate(struct xdr_stream *xdr,
0096d39b	123	const struct nfs42_falloc_args *args,
f4ac1674 AS	124	struct compound_hdr *hdr)
	125	{
	126	encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
	127	encode_fallocate(xdr, args);
	128	}
	129
2e72448b	130	static void encode_copy(struct xdr_stream *xdr,
0096d39b	131	const struct nfs42_copy_args *args,
2e72448b AS	132	struct compound_hdr *hdr)
	133	{
	134	encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
	135	encode_nfs4_stateid(xdr, &args->src_stateid);
	136	encode_nfs4_stateid(xdr, &args->dst_stateid);
	137
	138	encode_uint64(xdr, args->src_pos);
	139	encode_uint64(xdr, args->dst_pos);
	140	encode_uint64(xdr, args->count);
	141
	142	encode_uint32(xdr, 1); /* consecutive = true */
	143	encode_uint32(xdr, 1); /* synchronous = true */
	144	encode_uint32(xdr, 0); /* src server list */
	145	}
	146
624bd5b7	147	static void encode_deallocate(struct xdr_stream *xdr,
0096d39b	148	const struct nfs42_falloc_args *args,
624bd5b7 AS	149	struct compound_hdr *hdr)
	150	{
	151	encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
	152	encode_fallocate(xdr, args);
	153	}
	154
1c6dcbe5	155	static void encode_seek(struct xdr_stream *xdr,
0096d39b	156	const struct nfs42_seek_args *args,
1c6dcbe5 AS	157	struct compound_hdr *hdr)
	158	{
	159	encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
	160	encode_nfs4_stateid(xdr, &args->sa_stateid);
	161	encode_uint64(xdr, args->sa_offset);
	162	encode_uint32(xdr, args->sa_what);
	163	}
	164
be3a5d23	165	static void encode_layoutstats(struct xdr_stream *xdr,
0096d39b	166	const struct nfs42_layoutstat_args *args,
be3a5d23 TM	167	struct nfs42_layoutstat_devinfo *devinfo,
	168	struct compound_hdr *hdr)
	169	{
	170	__be32 *p;
	171
	172	encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
	173	p = reserve_space(xdr, 8 + 8);
	174	p = xdr_encode_hyper(p, devinfo->offset);
	175	p = xdr_encode_hyper(p, devinfo->length);
	176	encode_nfs4_stateid(xdr, &args->stateid);
	177	p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
	178	p = xdr_encode_hyper(p, devinfo->read_count);
	179	p = xdr_encode_hyper(p, devinfo->read_bytes);
	180	p = xdr_encode_hyper(p, devinfo->write_count);
	181	p = xdr_encode_hyper(p, devinfo->write_bytes);
	182	p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
	183	NFS4_DEVICEID4_SIZE);
	184	/* Encode layoutupdate4 */
	185	*p++ = cpu_to_be32(devinfo->layout_type);
422c93c8 TM	186	if (devinfo->ld_private.ops)
	187	devinfo->ld_private.ops->encode(xdr, args,
	188	&devinfo->ld_private);
be3a5d23 TM	189	else
	190	encode_uint32(xdr, 0);
	191	}
	192
36022770	193	static void encode_clone(struct xdr_stream *xdr,
0096d39b	194	const struct nfs42_clone_args *args,
36022770 PT	195	struct compound_hdr *hdr)
	196	{
	197	__be32 *p;
	198
	199	encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
	200	encode_nfs4_stateid(xdr, &args->src_stateid);
	201	encode_nfs4_stateid(xdr, &args->dst_stateid);
	202	p = reserve_space(xdr, 3*8);
	203	p = xdr_encode_hyper(p, args->src_offset);
	204	p = xdr_encode_hyper(p, args->dst_offset);
	205	xdr_encode_hyper(p, args->count);
	206	}
	207
f4ac1674 AS	208	/*
	209	* Encode ALLOCATE request
	210	*/
	211	static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
	212	struct xdr_stream *xdr,
0096d39b	213	const void *data)
f4ac1674	214	{
0096d39b	215	const struct nfs42_falloc_args *args = data;
f4ac1674 AS	216	struct compound_hdr hdr = {
	217	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	218	};
	219
	220	encode_compound_hdr(xdr, req, &hdr);
	221	encode_sequence(xdr, &args->seq_args, &hdr);
	222	encode_putfh(xdr, args->falloc_fh, &hdr);
	223	encode_allocate(xdr, args, &hdr);
9a51940b	224	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
f4ac1674 AS	225	encode_nops(&hdr);
	226	}
	227
e0926934	228	static void encode_copy_commit(struct xdr_stream *xdr,
0096d39b	229	const struct nfs42_copy_args *args,
e0926934 OK	230	struct compound_hdr *hdr)
	231	{
	232	__be32 *p;
	233
	234	encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
	235	p = reserve_space(xdr, 12);
	236	p = xdr_encode_hyper(p, args->dst_pos);
	237	*p = cpu_to_be32(args->count);
	238	}
	239
2e72448b AS	240	/*
	241	* Encode COPY request
	242	*/
	243	static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
	244	struct xdr_stream *xdr,
0096d39b	245	const void *data)
2e72448b	246	{
0096d39b	247	const struct nfs42_copy_args *args = data;
2e72448b AS	248	struct compound_hdr hdr = {
	249	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	250	};
	251
	252	encode_compound_hdr(xdr, req, &hdr);
	253	encode_sequence(xdr, &args->seq_args, &hdr);
	254	encode_putfh(xdr, args->src_fh, &hdr);
	255	encode_savefh(xdr, &hdr);
	256	encode_putfh(xdr, args->dst_fh, &hdr);
	257	encode_copy(xdr, args, &hdr);
e0926934	258	encode_copy_commit(xdr, args, &hdr);
2e72448b AS	259	encode_nops(&hdr);
	260	}
	261
624bd5b7 AS	262	/*
	263	* Encode DEALLOCATE request
	264	*/
	265	static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
	266	struct xdr_stream *xdr,
0096d39b	267	const void *data)
624bd5b7	268	{
0096d39b	269	const struct nfs42_falloc_args *args = data;
624bd5b7 AS	270	struct compound_hdr hdr = {
	271	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	272	};
	273
	274	encode_compound_hdr(xdr, req, &hdr);
	275	encode_sequence(xdr, &args->seq_args, &hdr);
	276	encode_putfh(xdr, args->falloc_fh, &hdr);
	277	encode_deallocate(xdr, args, &hdr);
9a51940b	278	encode_getfattr(xdr, args->falloc_bitmask, &hdr);
624bd5b7 AS	279	encode_nops(&hdr);
	280	}
	281
1c6dcbe5 AS	282	/*
	283	* Encode SEEK request
	284	*/
	285	static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
	286	struct xdr_stream *xdr,
0096d39b	287	const void *data)
1c6dcbe5	288	{
0096d39b	289	const struct nfs42_seek_args *args = data;
1c6dcbe5 AS	290	struct compound_hdr hdr = {
	291	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	292	};
	293
	294	encode_compound_hdr(xdr, req, &hdr);
	295	encode_sequence(xdr, &args->seq_args, &hdr);
	296	encode_putfh(xdr, args->sa_fh, &hdr);
	297	encode_seek(xdr, args, &hdr);
	298	encode_nops(&hdr);
	299	}
	300
be3a5d23 TM	301	/*
	302	* Encode LAYOUTSTATS request
	303	*/
	304	static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
	305	struct xdr_stream *xdr,
0096d39b	306	const void *data)
be3a5d23	307	{
0096d39b	308	const struct nfs42_layoutstat_args *args = data;
be3a5d23 TM	309	int i;
	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->fh, &hdr);
	318	WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	319	for (i = 0; i < args->num_dev; i++)
	320	encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
	321	encode_nops(&hdr);
	322	}
	323
36022770 PT	324	/*
	325	* Encode CLONE request
	326	*/
	327	static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
	328	struct xdr_stream *xdr,
0096d39b	329	const void *data)
36022770	330	{
0096d39b	331	const struct nfs42_clone_args *args = data;
36022770 PT	332	struct compound_hdr hdr = {
	333	.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	334	};
	335
	336	encode_compound_hdr(xdr, req, &hdr);
	337	encode_sequence(xdr, &args->seq_args, &hdr);
	338	encode_putfh(xdr, args->src_fh, &hdr);
	339	encode_savefh(xdr, &hdr);
	340	encode_putfh(xdr, args->dst_fh, &hdr);
	341	encode_clone(xdr, args, &hdr);
	342	encode_getfattr(xdr, args->dst_bitmask, &hdr);
	343	encode_nops(&hdr);
	344	}
	345
f4ac1674 AS	346	static int decode_allocate(struct xdr_stream xdr, struct nfs42_falloc_res res)
	347	{
	348	return decode_op_hdr(xdr, OP_ALLOCATE);
	349	}
	350
2e72448b AS	351	static int decode_write_response(struct xdr_stream *xdr,
	352	struct nfs42_write_res *res)
	353	{
	354	__be32 *p;
2e72448b AS	355
	356	p = xdr_inline_decode(xdr, 4 + 8 + 4);
	357	if (unlikely(!p))
	358	goto out_overflow;
	359
6fdf339b TM	360	/*
	361	* We never use asynchronous mode, so warn if a server returns
	362	* a stateid.
	363	*/
	364	if (unlikely(*p != 0)) {
	365	pr_err_once("%s: server has set unrequested "
	366	"asynchronous mode\n", __func__);
	367	return -EREMOTEIO;
	368	}
	369	p++;
2e72448b AS	370	p = xdr_decode_hyper(p, &res->count);
	371	res->verifier.committed = be32_to_cpup(p);
	372	return decode_verifier(xdr, &res->verifier.verifier);
	373
	374	out_overflow:
	375	print_overflow_msg(__func__, xdr);
	376	return -EIO;
	377	}
	378
	379	static int decode_copy_requirements(struct xdr_stream *xdr,
	380	struct nfs42_copy_res *res) {
	381	__be32 *p;
	382
	383	p = xdr_inline_decode(xdr, 4 + 4);
	384	if (unlikely(!p))
	385	goto out_overflow;
	386
	387	res->consecutive = be32_to_cpup(p++);
	388	res->synchronous = be32_to_cpup(p++);
	389	return 0;
	390	out_overflow:
	391	print_overflow_msg(__func__, xdr);
	392	return -EIO;
	393	}
	394
	395	static int decode_copy(struct xdr_stream xdr, struct nfs42_copy_res res)
	396	{
	397	int status;
	398
	399	status = decode_op_hdr(xdr, OP_COPY);
	400	if (status == NFS4ERR_OFFLOAD_NO_REQS) {
	401	status = decode_copy_requirements(xdr, res);
	402	if (status)
	403	return status;
	404	return NFS4ERR_OFFLOAD_NO_REQS;
	405	} else if (status)
	406	return status;
	407
	408	status = decode_write_response(xdr, &res->write_res);
	409	if (status)
	410	return status;
	411
	412	return decode_copy_requirements(xdr, res);
	413	}
	414
624bd5b7 AS	415	static int decode_deallocate(struct xdr_stream xdr, struct nfs42_falloc_res res)
	416	{
	417	return decode_op_hdr(xdr, OP_DEALLOCATE);
	418	}
	419
1c6dcbe5 AS	420	static int decode_seek(struct xdr_stream xdr, struct nfs42_seek_res res)
	421	{
	422	int status;
	423	__be32 *p;
	424
	425	status = decode_op_hdr(xdr, OP_SEEK);
	426	if (status)
	427	return status;
	428
	429	p = xdr_inline_decode(xdr, 4 + 8);
	430	if (unlikely(!p))
	431	goto out_overflow;
	432
	433	res->sr_eof = be32_to_cpup(p++);
	434	p = xdr_decode_hyper(p, &res->sr_offset);
	435	return 0;
	436
	437	out_overflow:
	438	print_overflow_msg(__func__, xdr);
	439	return -EIO;
	440	}
	441
19cf6335	442	static int decode_layoutstats(struct xdr_stream *xdr)
be3a5d23	443	{
da2e8127	444	return decode_op_hdr(xdr, OP_LAYOUTSTATS);
be3a5d23 TM	445	}
be3a5d23 TM	446
36022770 PT	447	static int decode_clone(struct xdr_stream *xdr)
	448	{
	449	return decode_op_hdr(xdr, OP_CLONE);
	450	}
	451
f4ac1674 AS	452	/*
	453	* Decode ALLOCATE request
	454	*/
	455	static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
	456	struct xdr_stream *xdr,
18d9cff4	457	void *data)
f4ac1674	458	{
18d9cff4	459	struct nfs42_falloc_res *res = data;
f4ac1674 AS	460	struct compound_hdr hdr;
	461	int status;
	462
	463	status = decode_compound_hdr(xdr, &hdr);
	464	if (status)
	465	goto out;
	466	status = decode_sequence(xdr, &res->seq_res, rqstp);
	467	if (status)
	468	goto out;
	469	status = decode_putfh(xdr);
	470	if (status)
	471	goto out;
	472	status = decode_allocate(xdr, res);
9a51940b AS	473	if (status)
	474	goto out;
	475	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
f4ac1674 AS	476	out:
	477	return status;
	478	}
	479
2e72448b AS	480	/*
	481	* Decode COPY response
	482	*/
	483	static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
	484	struct xdr_stream *xdr,
18d9cff4	485	void *data)
2e72448b	486	{
18d9cff4	487	struct nfs42_copy_res *res = data;
2e72448b AS	488	struct compound_hdr hdr;
	489	int status;
	490
	491	status = decode_compound_hdr(xdr, &hdr);
	492	if (status)
	493	goto out;
	494	status = decode_sequence(xdr, &res->seq_res, rqstp);
	495	if (status)
	496	goto out;
	497	status = decode_putfh(xdr);
	498	if (status)
	499	goto out;
	500	status = decode_savefh(xdr);
	501	if (status)
	502	goto out;
	503	status = decode_putfh(xdr);
	504	if (status)
	505	goto out;
	506	status = decode_copy(xdr, res);
e0926934 OK	507	if (status)
	508	goto out;
	509	status = decode_commit(xdr, &res->commit_res);
2e72448b AS	510	out:
	511	return status;
	512	}
	513
624bd5b7 AS	514	/*
	515	* Decode DEALLOCATE request
	516	*/
	517	static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
	518	struct xdr_stream *xdr,
18d9cff4	519	void *data)
624bd5b7	520	{
18d9cff4	521	struct nfs42_falloc_res *res = data;
624bd5b7 AS	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_deallocate(xdr, res);
9a51940b AS	535	if (status)
	536	goto out;
	537	decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
624bd5b7 AS	538	out:
	539	return status;
	540	}
	541
1c6dcbe5 AS	542	/*
	543	* Decode SEEK request
	544	*/
	545	static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
	546	struct xdr_stream *xdr,
18d9cff4	547	void *data)
1c6dcbe5	548	{
18d9cff4	549	struct nfs42_seek_res *res = data;
1c6dcbe5 AS	550	struct compound_hdr hdr;
	551	int status;
	552
	553	status = decode_compound_hdr(xdr, &hdr);
	554	if (status)
	555	goto out;
	556	status = decode_sequence(xdr, &res->seq_res, rqstp);
	557	if (status)
	558	goto out;
	559	status = decode_putfh(xdr);
	560	if (status)
	561	goto out;
	562	status = decode_seek(xdr, res);
	563	out:
	564	return status;
	565	}
be3a5d23 TM	566
	567	/*
	568	* Decode LAYOUTSTATS request
	569	*/
	570	static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
	571	struct xdr_stream *xdr,
18d9cff4	572	void *data)
be3a5d23	573	{
18d9cff4	574	struct nfs42_layoutstat_res *res = data;
be3a5d23 TM	575	struct compound_hdr hdr;
	576	int status, i;
	577
	578	status = decode_compound_hdr(xdr, &hdr);
	579	if (status)
	580	goto out;
	581	status = decode_sequence(xdr, &res->seq_res, rqstp);
	582	if (status)
	583	goto out;
	584	status = decode_putfh(xdr);
	585	if (status)
	586	goto out;
	587	WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
	588	for (i = 0; i < res->num_dev; i++) {
19cf6335	589	status = decode_layoutstats(xdr);
be3a5d23 TM	590	if (status)
	591	goto out;
	592	}
	593	out:
	594	res->rpc_status = status;
	595	return status;
	596	}
	597
36022770 PT	598	/*
	599	* Decode CLONE request
	600	*/
	601	static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
	602	struct xdr_stream *xdr,
18d9cff4	603	void *data)
36022770	604	{
18d9cff4	605	struct nfs42_clone_res *res = data;
36022770 PT	606	struct compound_hdr hdr;
	607	int status;
	608
	609	status = decode_compound_hdr(xdr, &hdr);
	610	if (status)
	611	goto out;
	612	status = decode_sequence(xdr, &res->seq_res, rqstp);
	613	if (status)
	614	goto out;
	615	status = decode_putfh(xdr);
	616	if (status)
	617	goto out;
	618	status = decode_savefh(xdr);
	619	if (status)
	620	goto out;
	621	status = decode_putfh(xdr);
	622	if (status)
	623	goto out;
	624	status = decode_clone(xdr);
	625	if (status)
	626	goto out;
	627	status = decode_getfattr(xdr, res->dst_fattr, res->server);
	628
	629	out:
	630	res->rpc_status = status;
	631	return status;
	632	}
	633
1c6dcbe5	634	#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */