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nfs4xdr.c
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/*
* fs/nfs/nfs4xdr.c
*
* Client-side XDR for NFSv4.
*
* Copyright (c) 2002 The Regents of the University of Michigan.
* All rights reserved.
*
* Kendrick Smith <kmsmith@umich.edu>
* Andy Adamson <andros@umich.edu>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/param.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/utsname.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/pagemap.h>
#include <linux/proc_fs.h>
#include <linux/kdev_t.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
#include "nfs4_fs.h"
#define NFSDBG_FACILITY NFSDBG_XDR
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
static int nfs_stat_to_errno(int);
/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
#define NFS4_MAXTAGLEN 20
#else
#define NFS4_MAXTAGLEN 0
#endif
/* lock,open owner id:
* we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT >> 2)
*/
#define owner_id_maxsz (1 + 1)
#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
#define op_encode_hdr_maxsz (1)
#define op_decode_hdr_maxsz (2)
#define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
(NFS4_FHSIZE >> 2))
#define decode_putfh_maxsz (op_decode_hdr_maxsz)
#define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
#define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
#define encode_getfh_maxsz (op_encode_hdr_maxsz)
#define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
((3+NFS4_FHSIZE) >> 2))
#define nfs4_fattr_bitmap_maxsz 3
#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
/* This is based on getfattr, which uses the most attributes: */
#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
3 + 3 + 3 + 2 * nfs4_name_maxsz))
#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
#define encode_savefh_maxsz (op_encode_hdr_maxsz)
#define decode_savefh_maxsz (op_decode_hdr_maxsz)
#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
#define encode_fsinfo_maxsz (op_encode_hdr_maxsz + 2)
#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
#define decode_renew_maxsz (op_decode_hdr_maxsz)
#define encode_setclientid_maxsz \
(op_encode_hdr_maxsz + \
4 /*server->ip_addr*/ + \
1 /*Netid*/ + \
6 /*uaddr*/ + \
6 + (NFS4_VERIFIER_SIZE >> 2))
#define decode_setclientid_maxsz \
(op_decode_hdr_maxsz + \
2 + \
1024) /* large value for CLID_INUSE */
#define encode_setclientid_confirm_maxsz \
(op_encode_hdr_maxsz + \
3 + (NFS4_VERIFIER_SIZE >> 2))
#define decode_setclientid_confirm_maxsz \
(op_decode_hdr_maxsz)
#define encode_lookup_maxsz (op_encode_hdr_maxsz + \
1 + ((3 + NFS4_FHSIZE) >> 2))
#define encode_remove_maxsz (op_encode_hdr_maxsz + \
nfs4_name_maxsz)
#define encode_rename_maxsz (op_encode_hdr_maxsz + \
2 * nfs4_name_maxsz)
#define decode_rename_maxsz (op_decode_hdr_maxsz + 5 + 5)
#define encode_link_maxsz (op_encode_hdr_maxsz + \
nfs4_name_maxsz)
#define decode_link_maxsz (op_decode_hdr_maxsz + 5)
#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
1 + nfs4_name_maxsz + \
nfs4_path_maxsz + \
nfs4_fattr_maxsz)
#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
#define encode_create_maxsz (op_encode_hdr_maxsz + \
2 + nfs4_name_maxsz + \
nfs4_fattr_maxsz)
#define decode_create_maxsz (op_decode_hdr_maxsz + 8)
#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 7)
#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 2)
#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz)
#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz)
#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 9)
#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 2)
#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 8 + \
encode_getattr_maxsz)
#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 4 + \
decode_getattr_maxsz)
#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 3 + \
encode_getattr_maxsz)
#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 2 + \
decode_getattr_maxsz)
#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + \
13 + 3 + 2 + 64 + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_open_confirm_sz \
(compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 5)
#define NFS4_dec_open_confirm_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 4)
#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + \
11)
#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + \
4 + 5 + 2 + 3)
#define NFS4_enc_open_downgrade_sz \
(compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 7 + \
encode_getattr_maxsz)
#define NFS4_dec_open_downgrade_sz \
(compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 4 + \
decode_getattr_maxsz)
#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 5 + \
encode_getattr_maxsz)
#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 4 + \
decode_getattr_maxsz)
#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 4 + \
nfs4_fattr_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 3)
#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
encode_renew_maxsz)
#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
decode_renew_maxsz)
#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
(compound_encode_hdr_maxsz + \
encode_setclientid_confirm_maxsz + \
encode_putrootfh_maxsz + \
encode_fsinfo_maxsz)
#define NFS4_dec_setclientid_confirm_sz \
(compound_decode_hdr_maxsz + \
decode_setclientid_confirm_maxsz + \
decode_putrootfh_maxsz + \
decode_fsinfo_maxsz)
#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz + \
op_encode_hdr_maxsz + \
1 + 1 + 2 + 2 + \
1 + 4 + 1 + 2 + \
owner_id_maxsz)
#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz + \
op_decode_hdr_maxsz + \
2 + 2 + 1 + 2 + \
owner_id_maxsz)
#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz + \
op_encode_hdr_maxsz + \
1 + 2 + 2 + 2 + \
owner_id_maxsz)
#define NFS4_dec_lockt_sz (NFS4_dec_lock_sz)
#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz + \
op_encode_hdr_maxsz + \
1 + 1 + 4 + 2 + 2)
#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz + \
op_decode_hdr_maxsz + 4)
#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 1)
#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 2)
#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_lookup_maxsz + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
encode_putrootfh_maxsz + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
decode_putrootfh_maxsz + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_remove_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 5 + \
decode_getattr_maxsz)
#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_putfh_maxsz + \
encode_rename_maxsz + \
encode_getattr_maxsz + \
encode_restorefh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_putfh_maxsz + \
decode_rename_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_putfh_maxsz + \
encode_link_maxsz + \
decode_getattr_maxsz + \
encode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_putfh_maxsz + \
decode_link_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_symlink_maxsz + \
encode_getattr_maxsz + \
encode_getfh_maxsz)
#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_symlink_maxsz + \
decode_getattr_maxsz + \
decode_getfh_maxsz)
#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
encode_create_maxsz + \
encode_getfh_maxsz + \
encode_getattr_maxsz + \
encode_restorefh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_savefh_maxsz + \
decode_create_maxsz + \
decode_getfh_maxsz + \
decode_getattr_maxsz + \
decode_restorefh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + 12)
#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_delegreturn_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
decode_delegreturn_maxsz + \
decode_getattr_maxsz)
#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + \
nfs4_fattr_bitmap_maxsz + 1)
#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
op_encode_hdr_maxsz + 4 + \
nfs4_fattr_bitmap_maxsz + 1)
#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
#define NFS4_enc_fs_locations_sz \
(compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_fs_locations_sz \
(compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
op_decode_hdr_maxsz + \
nfs4_fattr_bitmap_maxsz)
static struct {
unsigned int mode;
unsigned int nfs2type;
} nfs_type2fmt[] = {
{ 0, NFNON },
{ S_IFREG, NFREG },
{ S_IFDIR, NFDIR },
{ S_IFBLK, NFBLK },
{ S_IFCHR, NFCHR },
{ S_IFLNK, NFLNK },
{ S_IFSOCK, NFSOCK },
{ S_IFIFO, NFFIFO },
{ 0, NFNON },
{ 0, NFNON },
};
struct compound_hdr {
int32_t status;
uint32_t nops;
uint32_t taglen;
char * tag;
};
/*
* START OF "GENERIC" ENCODE ROUTINES.
* These may look a little ugly since they are imported from a "generic"
* set of XDR encode/decode routines which are intended to be shared by
* all of our NFSv4 implementations (OpenBSD, MacOS X...).
*
* If the pain of reading these is too great, it should be a straightforward
* task to translate them into Linux-specific versions which are more
* consistent with the style used in NFSv2/v3...
*/
#define WRITE32(n) *p++ = htonl(n)
#define WRITE64(n) do { \
*p++ = htonl((uint32_t)((n) >> 32)); \
*p++ = htonl((uint32_t)(n)); \
} while (0)
#define WRITEMEM(ptr,nbytes) do { \
p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
} while (0)
#define RESERVE_SPACE(nbytes) do { \
p = xdr_reserve_space(xdr, nbytes); \
if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
BUG_ON(!p); \
} while (0)
static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
uint32_t *p;
p = xdr_reserve_space(xdr, 4 + len);
BUG_ON(p == NULL);
xdr_encode_opaque(p, str, len);
}
static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
uint32_t *p;
dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
WRITE32(hdr->taglen);
WRITEMEM(hdr->tag, hdr->taglen);
WRITE32(NFS4_MINOR_VERSION);
WRITE32(hdr->nops);
return 0;
}
static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
uint32_t *p;
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
BUG_ON(p == NULL);
xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
}
static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
{
char owner_name[IDMAP_NAMESZ];
char owner_group[IDMAP_NAMESZ];
int owner_namelen = 0;
int owner_grouplen = 0;
uint32_t *p;
uint32_t *q;
int len;
uint32_t bmval0 = 0;
uint32_t bmval1 = 0;
int status;
/*
* We reserve enough space to write the entire attribute buffer at once.
* In the worst-case, this would be
* 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
* = 36 bytes, plus any contribution from variable-length fields
* such as owner/group.
*/
len = 16;
/* Sigh */
if (iap->ia_valid & ATTR_SIZE)
len += 8;
if (iap->ia_valid & ATTR_MODE)
len += 4;
if (iap->ia_valid & ATTR_UID) {
owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
if (owner_namelen < 0) {
printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
iap->ia_uid);
/* XXX */
strcpy(owner_name, "nobody");
owner_namelen = sizeof("nobody") - 1;
/* goto out; */
}
len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
}
if (iap->ia_valid & ATTR_GID) {
owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
if (owner_grouplen < 0) {
printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
iap->ia_gid);
strcpy(owner_group, "nobody");
owner_grouplen = sizeof("nobody") - 1;
/* goto out; */
}
len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
}
if (iap->ia_valid & ATTR_ATIME_SET)
len += 16;
else if (iap->ia_valid & ATTR_ATIME)
len += 4;
if (iap->ia_valid & ATTR_MTIME_SET)
len += 16;
else if (iap->ia_valid & ATTR_MTIME)
len += 4;
RESERVE_SPACE(len);
/*
* We write the bitmap length now, but leave the bitmap and the attribute
* buffer length to be backfilled at the end of this routine.
*/
WRITE32(2);
q = p;
p += 3;
if (iap->ia_valid & ATTR_SIZE) {
bmval0 |= FATTR4_WORD0_SIZE;
WRITE64(iap->ia_size);
}
if (iap->ia_valid & ATTR_MODE) {
bmval1 |= FATTR4_WORD1_MODE;
WRITE32(iap->ia_mode & S_IALLUGO);
}
if (iap->ia_valid & ATTR_UID) {
bmval1 |= FATTR4_WORD1_OWNER;
WRITE32(owner_namelen);
WRITEMEM(owner_name, owner_namelen);
}
if (iap->ia_valid & ATTR_GID) {
bmval1 |= FATTR4_WORD1_OWNER_GROUP;
WRITE32(owner_grouplen);
WRITEMEM(owner_group, owner_grouplen);
}
if (iap->ia_valid & ATTR_ATIME_SET) {
bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
WRITE32(NFS4_SET_TO_CLIENT_TIME);
WRITE32(0);
WRITE32(iap->ia_mtime.tv_sec);
WRITE32(iap->ia_mtime.tv_nsec);
}
else if (iap->ia_valid & ATTR_ATIME) {
bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
WRITE32(NFS4_SET_TO_SERVER_TIME);
}
if (iap->ia_valid & ATTR_MTIME_SET) {
bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
WRITE32(NFS4_SET_TO_CLIENT_TIME);
WRITE32(0);
WRITE32(iap->ia_mtime.tv_sec);
WRITE32(iap->ia_mtime.tv_nsec);
}
else if (iap->ia_valid & ATTR_MTIME) {
bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
WRITE32(NFS4_SET_TO_SERVER_TIME);
}
/*
* Now we backfill the bitmap and the attribute buffer length.
*/
if (len != ((char *)p - (char *)q) + 4) {
printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
len, ((char *)p - (char *)q) + 4);
BUG();
}
len = (char *)p - (char *)q - 12;
*q++ = htonl(bmval0);
*q++ = htonl(bmval1);
*q++ = htonl(len);
status = 0;
/* out: */
return status;
}
static int encode_access(struct xdr_stream *xdr, u32 access)
{
uint32_t *p;
RESERVE_SPACE(8);
WRITE32(OP_ACCESS);
WRITE32(access);
return 0;
}
static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
{
uint32_t *p;
RESERVE_SPACE(8+sizeof(arg->stateid->data));
WRITE32(OP_CLOSE);
WRITE32(arg->seqid->sequence->counter);
WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
return 0;
}
static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
{
uint32_t *p;
RESERVE_SPACE(16);
WRITE32(OP_COMMIT);
WRITE64(args->offset);
WRITE32(args->count);
return 0;
}
static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
{
uint32_t *p;
RESERVE_SPACE(8);
WRITE32(OP_CREATE);
WRITE32(create->ftype);
switch (create->ftype) {
case NF4LNK:
RESERVE_SPACE(4 + create->u.symlink->len);
WRITE32(create->u.symlink->len);
WRITEMEM(create->u.symlink->name, create->u.symlink->len);
break;
case NF4BLK: case NF4CHR:
RESERVE_SPACE(8);
WRITE32(create->u.device.specdata1);
WRITE32(create->u.device.specdata2);
break;
default:
break;
}
RESERVE_SPACE(4 + create->name->len);
WRITE32(create->name->len);
WRITEMEM(create->name->name, create->name->len);
return encode_attrs(xdr, create->attrs, create->server);
}
static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
{
uint32_t *p;
RESERVE_SPACE(12);
WRITE32(OP_GETATTR);
WRITE32(1);
WRITE32(bitmap);
return 0;
}
static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
{
uint32_t *p;
RESERVE_SPACE(16);
WRITE32(OP_GETATTR);
WRITE32(2);
WRITE32(bm0);
WRITE32(bm1);
return 0;
}
static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
{
return encode_getattr_two(xdr,
bitmask[0] & nfs4_fattr_bitmap[0],
bitmask[1] & nfs4_fattr_bitmap[1]);
}
static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
{
return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
bitmask[1] & nfs4_fsinfo_bitmap[1]);
}
static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
{
return encode_getattr_two(xdr,
bitmask[0] & nfs4_fs_locations_bitmap[0],
bitmask[1] & nfs4_fs_locations_bitmap[1]);
}
static int encode_getfh(struct xdr_stream *xdr)
{
uint32_t *p;
RESERVE_SPACE(4);
WRITE32(OP_GETFH);
return 0;
}
static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
{
uint32_t *p;
RESERVE_SPACE(8 + name->len);
WRITE32(OP_LINK);
WRITE32(name->len);
WRITEMEM(name->name, name->len);
return 0;
}
static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
return block ? NFS4_READW_LT : NFS4_READ_LT;
return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
}
static inline uint64_t nfs4_lock_length(struct file_lock *fl)
{
if (fl->fl_end == OFFSET_MAX)
return ~(uint64_t)0;
return fl->fl_end - fl->fl_start + 1;
}
/*
* opcode,type,reclaim,offset,length,new_lock_owner = 32
* open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
*/
static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
{
uint32_t *p;
RESERVE_SPACE(32);
WRITE32(OP_LOCK);
WRITE32(nfs4_lock_type(args->fl, args->block));
WRITE32(args->reclaim);
WRITE64(args->fl->fl_start);
WRITE64(nfs4_lock_length(args->fl));
WRITE32(args->new_lock_owner);
if (args->new_lock_owner){
RESERVE_SPACE(40);
WRITE32(args->open_seqid->sequence->counter);
WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
WRITE32(args->lock_seqid->sequence->counter);
WRITE64(args->lock_owner.clientid);
WRITE32(4);
WRITE32(args->lock_owner.id);
}
else {
RESERVE_SPACE(20);
WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
WRITE32(args->lock_seqid->sequence->counter);
}
return 0;
}
static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
{
uint32_t *p;
RESERVE_SPACE(40);
WRITE32(OP_LOCKT);
WRITE32(nfs4_lock_type(args->fl, 0));
WRITE64(args->fl->fl_start);
WRITE64(nfs4_lock_length(args->fl));
WRITE64(args->lock_owner.clientid);
WRITE32(4);
WRITE32(args->lock_owner.id);
return 0;
}
static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
{
uint32_t *p;
RESERVE_SPACE(44);
WRITE32(OP_LOCKU);
WRITE32(nfs4_lock_type(args->fl, 0));
WRITE32(args->seqid->sequence->counter);
WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
WRITE64(args->fl->fl_start);
WRITE64(nfs4_lock_length(args->fl));
return 0;
}
static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
{
int len = name->len;
uint32_t *p;
RESERVE_SPACE(8 + len);
WRITE32(OP_LOOKUP);
WRITE32(len);
WRITEMEM(name->name, len);
return 0;
}
static void encode_share_access(struct xdr_stream *xdr, int open_flags)
{
uint32_t *p;
RESERVE_SPACE(8);
switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
case FMODE_READ:
WRITE32(NFS4_SHARE_ACCESS_READ);
break;
case FMODE_WRITE:
WRITE32(NFS4_SHARE_ACCESS_WRITE);
break;
case FMODE_READ|FMODE_WRITE:
WRITE32(NFS4_SHARE_ACCESS_BOTH);
break;
default:
BUG();
}
WRITE32(0); /* for linux, share_deny = 0 always */
}
static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
uint32_t *p;
/*
* opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
* owner 4 = 32
*/
RESERVE_SPACE(8);
WRITE32(OP_OPEN);
WRITE32(arg->seqid->sequence->counter);
encode_share_access(xdr, arg->open_flags);
RESERVE_SPACE(16);
WRITE64(arg->clientid);
WRITE32(4);
WRITE32(arg->id);
}
static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
uint32_t *p;
RESERVE_SPACE(4);
switch(arg->open_flags & O_EXCL) {
case 0:
WRITE32(NFS4_CREATE_UNCHECKED);
encode_attrs(xdr, arg->u.attrs, arg->server);
break;
default:
WRITE32(NFS4_CREATE_EXCLUSIVE);
encode_nfs4_verifier(xdr, &arg->u.verifier);
}
}
static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
uint32_t *p;
RESERVE_SPACE(4);
switch (arg->open_flags & O_CREAT) {
case 0:
WRITE32(NFS4_OPEN_NOCREATE);
break;
default:
BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
WRITE32(NFS4_OPEN_CREATE);
encode_createmode(xdr, arg);
}
}
static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
{
uint32_t *p;
RESERVE_SPACE(4);
switch (delegation_type) {
case 0:
WRITE32(NFS4_OPEN_DELEGATE_NONE);
break;
case FMODE_READ:
WRITE32(NFS4_OPEN_DELEGATE_READ);
break;
case FMODE_WRITE|FMODE_READ:
WRITE32(NFS4_OPEN_DELEGATE_WRITE);
break;
default:
BUG();
}
}
static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
uint32_t *p;
RESERVE_SPACE(4);
WRITE32(NFS4_OPEN_CLAIM_NULL);
encode_string(xdr, name->len, name->name);
}
static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
{
uint32_t *p;
RESERVE_SPACE(4);
WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
encode_delegation_type(xdr, type);
}
static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
uint32_t *p;
RESERVE_SPACE(4+sizeof(stateid->data));
WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
WRITEMEM(stateid->data, sizeof(stateid->data));
encode_string(xdr, name->len, name->name);
}
static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
encode_openhdr(xdr, arg);
encode_opentype(xdr, arg);
switch (arg->claim) {
case NFS4_OPEN_CLAIM_NULL:
encode_claim_null(xdr, arg->name);
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
encode_claim_previous(xdr, arg->u.delegation_type);
break;
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
break;
default:
BUG();
}
return 0;
}
static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
{
uint32_t *p;
RESERVE_SPACE(8+sizeof(arg->stateid->data));
WRITE32(OP_OPEN_CONFIRM);
WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
WRITE32(arg->seqid->sequence->counter);