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nfs42xdr.c
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// 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 +\
1 + /* One cnr_source_server */\
1 + /* nl4_type */ \
1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
#define decode_copy_maxsz (op_decode_hdr_maxsz + \
NFS42_WRITE_RES_SIZE + \
1 /* cr_consecutive */ + \
1 /* cr_synchronous */)
#define encode_offload_cancel_maxsz (op_encode_hdr_maxsz + \
XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_offload_cancel_maxsz (op_decode_hdr_maxsz)
#define encode_copy_notify_maxsz (op_encode_hdr_maxsz + \
XDR_QUADLEN(NFS4_STATEID_SIZE) + \
1 + /* nl4_type */ \
1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
#define decode_copy_notify_maxsz (op_decode_hdr_maxsz + \
3 + /* cnr_lease_time */\
XDR_QUADLEN(NFS4_STATEID_SIZE) + \
1 + /* Support 1 cnr_source_server */\
1 + /* nl4_type */ \
1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
#define encode_deallocate_maxsz (op_encode_hdr_maxsz + \
encode_fallocate_maxsz)
#define decode_deallocate_maxsz (op_decode_hdr_maxsz)
#define encode_read_plus_maxsz (op_encode_hdr_maxsz + \
encode_stateid_maxsz + 3)
#define NFS42_READ_PLUS_DATA_SEGMENT_SIZE \
(1 /* data_content4 */ + \
2 /* data_info4.di_offset */ + \
1 /* data_info4.di_length */)
#define decode_read_plus_maxsz (op_decode_hdr_maxsz + \
1 /* rpr_eof */ + \
1 /* rpr_contents count */ + \
NFS42_READ_PLUS_DATA_SEGMENT_SIZE)
#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_device_error_maxsz (XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
1 /* status */ + 1 /* opnum */)
#define encode_layouterror_maxsz (op_decode_hdr_maxsz + \
2 /* offset */ + \
2 /* length */ + \
encode_stateid_maxsz + \
1 /* Array size */ + \
encode_device_error_maxsz)
#define decode_layouterror_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_sequence_maxsz + \
encode_putfh_maxsz + \
encode_allocate_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_allocate_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_allocate_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_copy_sz (compound_encode_hdr_maxsz + \
encode_sequence_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_sequence_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_putfh_maxsz + \
decode_copy_maxsz + \
decode_commit_maxsz)
#define NFS4_enc_offload_cancel_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_offload_cancel_maxsz)
#define NFS4_dec_offload_cancel_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_offload_cancel_maxsz)
#define NFS4_enc_copy_notify_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_copy_notify_maxsz)
#define NFS4_dec_copy_notify_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_copy_notify_maxsz)
#define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_deallocate_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_deallocate_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_deallocate_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_read_plus_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_read_plus_maxsz)
#define NFS4_dec_read_plus_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_read_plus_maxsz)
#define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_seek_maxsz)
#define NFS4_dec_seek_sz (compound_decode_hdr_maxsz + \
decode_sequence_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_layouterror_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
NFS42_LAYOUTERROR_MAX * \
encode_layouterror_maxsz)
#define NFS4_dec_layouterror_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
NFS42_LAYOUTERROR_MAX * \
decode_layouterror_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)
/* Not limited by NFS itself, limited by the generic xattr code */
#define nfs4_xattr_name_maxsz XDR_QUADLEN(XATTR_NAME_MAX)
#define encode_getxattr_maxsz (op_encode_hdr_maxsz + 1 + \
nfs4_xattr_name_maxsz)
#define decode_getxattr_maxsz (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
#define encode_setxattr_maxsz (op_encode_hdr_maxsz + \
1 + nfs4_xattr_name_maxsz + 1)
#define decode_setxattr_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
#define encode_listxattrs_maxsz (op_encode_hdr_maxsz + 2 + 1)
#define decode_listxattrs_maxsz (op_decode_hdr_maxsz + 2 + 1 + 1 + 1)
#define encode_removexattr_maxsz (op_encode_hdr_maxsz + 1 + \
nfs4_xattr_name_maxsz)
#define decode_removexattr_maxsz (op_decode_hdr_maxsz + \
decode_change_info_maxsz)
#define NFS4_enc_getxattr_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_getxattr_maxsz)
#define NFS4_dec_getxattr_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_getxattr_maxsz)
#define NFS4_enc_setxattr_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_setxattr_maxsz)
#define NFS4_dec_setxattr_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_setxattr_maxsz)
#define NFS4_enc_listxattrs_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_listxattrs_maxsz)
#define NFS4_dec_listxattrs_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_listxattrs_maxsz)
#define NFS4_enc_removexattr_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_removexattr_maxsz)
#define NFS4_dec_removexattr_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_removexattr_maxsz)
/*
* These values specify the maximum amount of data that is not
* associated with the extended attribute name or extended
* attribute list in the SETXATTR, GETXATTR and LISTXATTR
* respectively.
*/
const u32 nfs42_maxsetxattr_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
encode_sequence_maxsz +
encode_putfh_maxsz + 1 +
nfs4_xattr_name_maxsz)
* XDR_UNIT);
const u32 nfs42_maxgetxattr_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_decode_hdr_maxsz +
decode_sequence_maxsz +
decode_putfh_maxsz + 1) * XDR_UNIT);
const u32 nfs42_maxlistxattrs_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_decode_hdr_maxsz +
decode_sequence_maxsz +
decode_putfh_maxsz + 3) * XDR_UNIT);
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_nl4_server(struct xdr_stream *xdr,
const struct nl4_server *ns)
{
encode_uint32(xdr, ns->nl4_type);
switch (ns->nl4_type) {
case NL4_NAME:
case NL4_URL:
encode_string(xdr, ns->u.nl4_str_sz, ns->u.nl4_str);
break;
case NL4_NETADDR:
encode_string(xdr, ns->u.nl4_addr.netid_len,
ns->u.nl4_addr.netid);
encode_string(xdr, ns->u.nl4_addr.addr_len,
ns->u.nl4_addr.addr);
break;
default:
WARN_ON_ONCE(1);
}
}
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, args->sync);
if (args->cp_src == NULL) { /* intra-ssc */
encode_uint32(xdr, 0); /* no src server list */
return;
}
encode_uint32(xdr, 1); /* supporting 1 server */
encode_nl4_server(xdr, args->cp_src);
}
static void encode_offload_cancel(struct xdr_stream *xdr,
const struct nfs42_offload_status_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_OFFLOAD_CANCEL, decode_offload_cancel_maxsz, hdr);
encode_nfs4_stateid(xdr, &args->osa_stateid);
}
static void encode_copy_notify(struct xdr_stream *xdr,
const struct nfs42_copy_notify_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_COPY_NOTIFY, decode_copy_notify_maxsz, hdr);
encode_nfs4_stateid(xdr, &args->cna_src_stateid);
encode_nl4_server(xdr, &args->cna_dst);
}
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_read_plus(struct xdr_stream *xdr,
const struct nfs_pgio_args *args,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_READ_PLUS, decode_read_plus_maxsz, hdr);
encode_nfs4_stateid(xdr, &args->stateid);
encode_uint64(xdr, args->offset);
encode_uint32(xdr, args->count);
}
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);
}
static void encode_device_error(struct xdr_stream *xdr,
const struct nfs42_device_error *error)
{
__be32 *p;
p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 2*4);
p = xdr_encode_opaque_fixed(p, error->dev_id.data,
NFS4_DEVICEID4_SIZE);
*p++ = cpu_to_be32(error->status);
*p = cpu_to_be32(error->opnum);
}
static void encode_layouterror(struct xdr_stream *xdr,
const struct nfs42_layout_error *args,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LAYOUTERROR, decode_layouterror_maxsz, hdr);
p = reserve_space(xdr, 8 + 8);
p = xdr_encode_hyper(p, args->offset);
p = xdr_encode_hyper(p, args->length);
encode_nfs4_stateid(xdr, &args->stateid);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(1);
encode_device_error(xdr, &args->errors[0]);
}
static void encode_setxattr(struct xdr_stream *xdr,
const struct nfs42_setxattrargs *arg,
struct compound_hdr *hdr)
{
__be32 *p;
BUILD_BUG_ON(XATTR_CREATE != SETXATTR4_CREATE);
BUILD_BUG_ON(XATTR_REPLACE != SETXATTR4_REPLACE);
encode_op_hdr(xdr, OP_SETXATTR, decode_setxattr_maxsz, hdr);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(arg->xattr_flags);
encode_string(xdr, strlen(arg->xattr_name), arg->xattr_name);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(arg->xattr_len);
if (arg->xattr_len)
xdr_write_pages(xdr, arg->xattr_pages, 0, arg->xattr_len);
}
static int decode_setxattr(struct xdr_stream *xdr,
struct nfs4_change_info *cinfo)
{
int status;
status = decode_op_hdr(xdr, OP_SETXATTR);
if (status)
goto out;
status = decode_change_info(xdr, cinfo);
out:
return status;
}
static void encode_getxattr(struct xdr_stream *xdr, const char *name,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_GETXATTR, decode_getxattr_maxsz, hdr);
encode_string(xdr, strlen(name), name);
}
static int decode_getxattr(struct xdr_stream *xdr,
struct nfs42_getxattrres *res,
struct rpc_rqst *req)
{
int status;
__be32 *p;
u32 len, rdlen;
status = decode_op_hdr(xdr, OP_GETXATTR);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
len = be32_to_cpup(p);
/*
* Only check against the page length here. The actual
* requested length may be smaller, but that is only
* checked against after possibly caching a valid reply.
*/
if (len > req->rq_rcv_buf.page_len)
return -ERANGE;
res->xattr_len = len;
if (len > 0) {
rdlen = xdr_read_pages(xdr, len);
if (rdlen < len)
return -EIO;
}
return 0;
}
static void encode_removexattr(struct xdr_stream *xdr, const char *name,
struct compound_hdr *hdr)
{
encode_op_hdr(xdr, OP_REMOVEXATTR, decode_removexattr_maxsz, hdr);
encode_string(xdr, strlen(name), name);
}
static int decode_removexattr(struct xdr_stream *xdr,
struct nfs4_change_info *cinfo)
{
int status;
status = decode_op_hdr(xdr, OP_REMOVEXATTR);
if (status)
goto out;
status = decode_change_info(xdr, cinfo);
out:
return status;
}
static void encode_listxattrs(struct xdr_stream *xdr,
const struct nfs42_listxattrsargs *arg,
struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_LISTXATTRS, decode_listxattrs_maxsz, hdr);
p = reserve_space(xdr, 12);
if (unlikely(!p))
return;
p = xdr_encode_hyper(p, arg->cookie);
/*
* RFC 8276 says to specify the full max length of the LISTXATTRS
* XDR reply. Count is set to the XDR length of the names array
* plus the EOF marker. So, add the cookie and the names count.
*/
*p = cpu_to_be32(arg->count + 8 + 4);
}
static int decode_listxattrs(struct xdr_stream *xdr,
struct nfs42_listxattrsres *res)
{
int status;
__be32 *p;
u32 count, len, ulen;
size_t left, copied;
char *buf;
status = decode_op_hdr(xdr, OP_LISTXATTRS);
if (status) {
/*
* Special case: for LISTXATTRS, NFS4ERR_TOOSMALL
* should be translated to ERANGE.
*/
if (status == -ETOOSMALL)
status = -ERANGE;
/*
* Special case: for LISTXATTRS, NFS4ERR_NOXATTR
* should be translated to success with zero-length reply.
*/
if (status == -ENODATA) {
res->eof = true;
status = 0;
}
goto out;
}
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
return -EIO;
xdr_decode_hyper(p, &res->cookie);
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
left = res->xattr_len;
buf = res->xattr_buf;
count = be32_to_cpup(p);
copied = 0;
/*
* We have asked for enough room to encode the maximum number
* of possible attribute names, so everything should fit.
*
* But, don't rely on that assumption. Just decode entries
* until they don't fit anymore, just in case the server did
* something odd.
*/
while (count--) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
len = be32_to_cpup(p);
if (len > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
status = -ERANGE;
goto out;
}
p = xdr_inline_decode(xdr, len);
if (unlikely(!p))
return -EIO;
ulen = len + XATTR_USER_PREFIX_LEN + 1;
if (buf) {
if (ulen > left) {
status = -ERANGE;
goto out;
}
memcpy(buf, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
memcpy(buf + XATTR_USER_PREFIX_LEN, p, len);
buf[ulen - 1] = 0;
buf += ulen;
left -= ulen;
}
copied += ulen;
}
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
res->eof = be32_to_cpup(p);
res->copied = copied;
out:
if (status == -ERANGE && res->xattr_len == XATTR_LIST_MAX)
status = -E2BIG;
return status;
}
/*
* 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);
if (args->sync)
encode_copy_commit(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode OFFLOAD_CANEL request
*/
static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
struct xdr_stream *xdr,
const void *data)
{
const struct nfs42_offload_status_args *args = data;
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->osa_seq_args, &hdr);
encode_putfh(xdr, args->osa_src_fh, &hdr);
encode_offload_cancel(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode COPY_NOTIFY request
*/
static void nfs4_xdr_enc_copy_notify(struct rpc_rqst *req,
struct xdr_stream *xdr,
const void *data)
{
const struct nfs42_copy_notify_args *args = data;
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->cna_seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->cna_seq_args, &hdr);
encode_putfh(xdr, args->cna_src_fh, &hdr);
encode_copy_notify(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 READ_PLUS request
*/
static void nfs4_xdr_enc_read_plus(struct rpc_rqst *req,
struct xdr_stream *xdr,
const void *data)
{
const struct nfs_pgio_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->fh, &hdr);
encode_read_plus(xdr, args, &hdr);
rpc_prepare_reply_pages(req, args->pages, args->pgbase,
args->count, hdr.replen);
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);
}
/*
* Encode LAYOUTERROR request
*/
static void nfs4_xdr_enc_layouterror(struct rpc_rqst *req,
struct xdr_stream *xdr,
const void *data)
{
const struct nfs42_layouterror_args *args = data;
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
int i;
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, NFS_FH(args->inode), &hdr);
for (i = 0; i < args->num_errors; i++)
encode_layouterror(xdr, &args->errors[i], &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;
int status, count;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
count = be32_to_cpup(p);
if (count > 1)
return -EREMOTEIO;
else if (count == 1) {
status = decode_opaque_fixed(xdr, &res->stateid,
NFS4_STATEID_SIZE);
if (unlikely(status))
return -EIO;
}
p = xdr_inline_decode(xdr, 8 + 4);
if (unlikely(!p))
return -EIO;
p = xdr_decode_hyper(p, &res->count);
res->verifier.committed = be32_to_cpup(p);
return decode_verifier(xdr, &res->verifier.verifier);
}
static int decode_nl4_server(struct xdr_stream *xdr, struct nl4_server *ns)
{
struct nfs42_netaddr *naddr;
uint32_t dummy;
char *dummy_str;
__be32 *p;
int status;
/* nl_type */
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
return -EIO;
ns->nl4_type = be32_to_cpup(p);
switch (ns->nl4_type) {
case NL4_NAME:
case NL4_URL:
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
return -EIO;
memcpy(&ns->u.nl4_str, dummy_str, dummy);
ns->u.nl4_str_sz = dummy;
break;
case NL4_NETADDR:
naddr = &ns->u.nl4_addr;
/* netid string */
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
if (unlikely(dummy > RPCBIND_MAXNETIDLEN))
return -EIO;
naddr->netid_len = dummy;
memcpy(naddr->netid, dummy_str, naddr->netid_len);
/* uaddr string */
status = decode_opaque_inline(xdr, &dummy, &dummy_str);
if (unlikely(status))
return status;
if (unlikely(dummy > RPCBIND_MAXUADDRLEN))
return -EIO;
naddr->addr_len = dummy;
memcpy(naddr->addr, dummy_str, naddr->addr_len);
break;
default:
WARN_ON_ONCE(1);
return -EIO;
}
return 0;
}
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))
return -EIO;
res->consecutive = be32_to_cpup(p++);
res->synchronous = be32_to_cpup(p++);
return 0;
}
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_offload_cancel(struct xdr_stream *xdr,
struct nfs42_offload_status_res *res)
{
return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
}
static int decode_copy_notify(struct xdr_stream *xdr,
struct nfs42_copy_notify_res *res)
{
__be32 *p;
int status, count;