nfs4xdr.c 114.8 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
/*
 *  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>
54
#include "nfs4_fs.h"
L
Linus Torvalds 已提交
55 56 57 58 59 60

#define NFSDBG_FACILITY		NFSDBG_XDR

/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO		EIO

61
static int nfs4_stat_to_errno(int);
L
Linus Torvalds 已提交
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

/* 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))
86 87
#define nfs4_fattr_bitmap_maxsz 3
#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
L
Linus Torvalds 已提交
88 89
#define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
#define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
90 91
#define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
92 93
/* 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 + \
94
				3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
95 96 97
#define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
				nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
L
Linus Torvalds 已提交
98 99
#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
100 101
#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
L
Linus Torvalds 已提交
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
#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 + \
133
				1 + \
134
				nfs4_fattr_maxsz)
L
Linus Torvalds 已提交
135 136 137
#define decode_symlink_maxsz	(op_decode_hdr_maxsz + 8)
#define encode_create_maxsz	(op_encode_hdr_maxsz + \
				2 + nfs4_name_maxsz + \
138
				nfs4_fattr_maxsz)
L
Linus Torvalds 已提交
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
#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 + \
164 165
				op_encode_hdr_maxsz + 8 + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
166 167
#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
168 169
				op_decode_hdr_maxsz + 4 + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
170 171
#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
172 173
				op_encode_hdr_maxsz + 3 + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
174 175
#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
176 177
				op_decode_hdr_maxsz + 2 + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206
#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 + \
207 208
                                op_encode_hdr_maxsz + 7 + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
209 210 211
#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
                                decode_putfh_maxsz + \
212 213
                                op_decode_hdr_maxsz + 4 + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
214 215
#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
                                encode_putfh_maxsz + \
216 217
                                op_encode_hdr_maxsz + 5 + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
218 219
#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
                                decode_putfh_maxsz + \
220 221
                                op_decode_hdr_maxsz + 4 + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
222 223 224
#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
                                encode_putfh_maxsz + \
                                op_encode_hdr_maxsz + 4 + \
225
                                nfs4_fattr_maxsz + \
L
Linus Torvalds 已提交
226 227 228
                                encode_getattr_maxsz)
#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
                                decode_putfh_maxsz + \
229 230
                                op_decode_hdr_maxsz + 3 + \
                                nfs4_fattr_maxsz)
L
Linus Torvalds 已提交
231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
#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 + \
316 317
				encode_remove_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
318 319
#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
320 321
				op_decode_hdr_maxsz + 5 + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
322 323 324 325
#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
326 327 328 329
				encode_rename_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
330 331 332 333
#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
334 335 336 337
				decode_rename_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
338 339 340 341
#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
342 343 344 345
				encode_link_maxsz + \
				decode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
346 347 348 349
#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
350 351 352 353
				decode_link_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
354 355 356 357 358 359 360 361 362 363 364 365
#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 + \
366
				encode_savefh_maxsz + \
L
Linus Torvalds 已提交
367
				encode_create_maxsz + \
368
				encode_getfh_maxsz + \
L
Linus Torvalds 已提交
369
				encode_getattr_maxsz + \
370 371
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
372 373
#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
				decode_putfh_maxsz + \
374
				decode_savefh_maxsz + \
L
Linus Torvalds 已提交
375
				decode_create_maxsz + \
376
				decode_getfh_maxsz + \
L
Linus Torvalds 已提交
377
				decode_getattr_maxsz + \
378 379
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
380 381 382 383 384 385 386 387 388 389 390 391 392
#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 + \
393
				encode_putfh_maxsz + \
L
Linus Torvalds 已提交
394 395
				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
396
				decode_putfh_maxsz + \
L
Linus Torvalds 已提交
397 398 399
				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
				encode_putfh_maxsz + \
400 401
				encode_delegreturn_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
402
#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
403 404
				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
405 406 407 408 409 410 411
#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)
412 413 414 415 416 417 418
#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)
419 420 421 422 423 424 425 426 427
#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)
L
Linus Torvalds 已提交
428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478

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)
{
A
Al Viro 已提交
479
	__be32 *p;
L
Linus Torvalds 已提交
480 481 482 483 484 485 486 487

	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)
{
A
Al Viro 已提交
488
	__be32 *p;
L
Linus Torvalds 已提交
489 490 491 492 493 494 495 496 497 498 499 500 501

	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)
{
A
Al Viro 已提交
502
	__be32 *p;
L
Linus Torvalds 已提交
503 504 505 506 507 508 509 510 511 512 513 514

	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;
A
Al Viro 已提交
515 516
	__be32 *p;
	__be32 *q;
L
Linus Torvalds 已提交
517 518 519 520 521 522 523 524 525 526
	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
527
	 *            such as owner/group.
L
Linus Torvalds 已提交
528 529 530 531 532 533 534 535 536
	 */
	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) {
537
		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
L
Linus Torvalds 已提交
538 539 540 541 542 543 544 545 546 547 548
		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) {
549
		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
L
Linus Torvalds 已提交
550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582
		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;
583
		WRITE32(iap->ia_mode & S_IALLUGO);
L
Linus Torvalds 已提交
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637
	}
	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)
{
A
Al Viro 已提交
638
	__be32 *p;
L
Linus Torvalds 已提交
639 640 641 642 643 644 645 646 647 648

	RESERVE_SPACE(8);
	WRITE32(OP_ACCESS);
	WRITE32(access);
	
	return 0;
}

static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
{
A
Al Viro 已提交
649
	__be32 *p;
L
Linus Torvalds 已提交
650

651
	RESERVE_SPACE(8+NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
652
	WRITE32(OP_CLOSE);
653
	WRITE32(arg->seqid->sequence->counter);
654
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
655 656 657 658 659 660
	
	return 0;
}

static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
{
A
Al Viro 已提交
661
	__be32 *p;
L
Linus Torvalds 已提交
662 663 664 665 666 667 668 669 670 671 672
        
        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)
{
A
Al Viro 已提交
673
	__be32 *p;
L
Linus Torvalds 已提交
674 675 676 677 678 679 680
	
	RESERVE_SPACE(8);
	WRITE32(OP_CREATE);
	WRITE32(create->ftype);

	switch (create->ftype) {
	case NF4LNK:
681 682 683
		RESERVE_SPACE(4);
		WRITE32(create->u.symlink.len);
		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
L
Linus Torvalds 已提交
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
		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)
{
A
Al Viro 已提交
705
        __be32 *p;
L
Linus Torvalds 已提交
706 707 708 709 710 711 712 713 714 715

        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)
{
A
Al Viro 已提交
716
        __be32 *p;
L
Linus Torvalds 已提交
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738

        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]);
}

739 740 741 742 743 744 745
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]);
}

L
Linus Torvalds 已提交
746 747
static int encode_getfh(struct xdr_stream *xdr)
{
A
Al Viro 已提交
748
	__be32 *p;
L
Linus Torvalds 已提交
749 750 751 752 753 754 755 756 757

	RESERVE_SPACE(4);
	WRITE32(OP_GETFH);

	return 0;
}

static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
{
A
Al Viro 已提交
758
	__be32 *p;
L
Linus Torvalds 已提交
759 760 761 762 763 764 765 766 767

	RESERVE_SPACE(8 + name->len);
	WRITE32(OP_LINK);
	WRITE32(name->len);
	WRITEMEM(name->name, name->len);
	
	return 0;
}

T
Trond Myklebust 已提交
768 769 770 771 772 773 774 775 776 777 778 779 780 781
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;
}

L
Linus Torvalds 已提交
782 783 784 785
/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
T
Trond Myklebust 已提交
786
static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
L
Linus Torvalds 已提交
787
{
A
Al Viro 已提交
788
	__be32 *p;
L
Linus Torvalds 已提交
789 790 791

	RESERVE_SPACE(32);
	WRITE32(OP_LOCK);
T
Trond Myklebust 已提交
792 793 794 795 796 797
	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){
798
		RESERVE_SPACE(4+NFS4_STATEID_SIZE+20);
T
Trond Myklebust 已提交
799
		WRITE32(args->open_seqid->sequence->counter);
800
		WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
T
Trond Myklebust 已提交
801 802
		WRITE32(args->lock_seqid->sequence->counter);
		WRITE64(args->lock_owner.clientid);
L
Linus Torvalds 已提交
803
		WRITE32(4);
T
Trond Myklebust 已提交
804
		WRITE32(args->lock_owner.id);
L
Linus Torvalds 已提交
805 806
	}
	else {
807 808
		RESERVE_SPACE(NFS4_STATEID_SIZE+4);
		WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
T
Trond Myklebust 已提交
809
		WRITE32(args->lock_seqid->sequence->counter);
L
Linus Torvalds 已提交
810 811 812 813 814
	}

	return 0;
}

T
Trond Myklebust 已提交
815
static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
816
{
A
Al Viro 已提交
817
	__be32 *p;
L
Linus Torvalds 已提交
818 819 820

	RESERVE_SPACE(40);
	WRITE32(OP_LOCKT);
T
Trond Myklebust 已提交
821 822 823 824
	WRITE32(nfs4_lock_type(args->fl, 0));
	WRITE64(args->fl->fl_start);
	WRITE64(nfs4_lock_length(args->fl));
	WRITE64(args->lock_owner.clientid);
L
Linus Torvalds 已提交
825
	WRITE32(4);
T
Trond Myklebust 已提交
826
	WRITE32(args->lock_owner.id);
L
Linus Torvalds 已提交
827 828 829 830

	return 0;
}

T
Trond Myklebust 已提交
831
static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
L
Linus Torvalds 已提交
832
{
A
Al Viro 已提交
833
	__be32 *p;
L
Linus Torvalds 已提交
834

835
	RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
L
Linus Torvalds 已提交
836
	WRITE32(OP_LOCKU);
T
Trond Myklebust 已提交
837 838
	WRITE32(nfs4_lock_type(args->fl, 0));
	WRITE32(args->seqid->sequence->counter);
839
	WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
T
Trond Myklebust 已提交
840 841
	WRITE64(args->fl->fl_start);
	WRITE64(nfs4_lock_length(args->fl));
L
Linus Torvalds 已提交
842 843 844 845 846 847 848

	return 0;
}

static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
{
	int len = name->len;
A
Al Viro 已提交
849
	__be32 *p;
L
Linus Torvalds 已提交
850 851 852 853 854 855 856 857 858 859 860

	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)
{
A
Al Viro 已提交
861
	__be32 *p;
L
Linus Torvalds 已提交
862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881

	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)
{
A
Al Viro 已提交
882
	__be32 *p;
L
Linus Torvalds 已提交
883 884 885 886 887 888
 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
	RESERVE_SPACE(8);
	WRITE32(OP_OPEN);
889
	WRITE32(arg->seqid->sequence->counter);
L
Linus Torvalds 已提交
890 891 892 893 894 895 896 897 898
	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)
{
A
Al Viro 已提交
899
	__be32 *p;
L
Linus Torvalds 已提交
900 901 902 903 904 905 906 907 908 909 910 911 912 913 914

	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)
{
A
Al Viro 已提交
915
	__be32 *p;
L
Linus Torvalds 已提交
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930

	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)
{
A
Al Viro 已提交
931
	__be32 *p;
L
Linus Torvalds 已提交
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950

	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)
{
A
Al Viro 已提交
951
	__be32 *p;
L
Linus Torvalds 已提交
952 953 954 955 956 957 958 959

	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)
{
A
Al Viro 已提交
960
	__be32 *p;
L
Linus Torvalds 已提交
961 962 963 964 965 966 967 968

	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)
{
A
Al Viro 已提交
969
	__be32 *p;
L
Linus Torvalds 已提交
970

971
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
972
	WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
973
	WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998
	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)
{
A
Al Viro 已提交
999
	__be32 *p;
L
Linus Torvalds 已提交
1000

1001
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
L
Linus Torvalds 已提交
1002
	WRITE32(OP_OPEN_CONFIRM);
1003
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1004
	WRITE32(arg->seqid->sequence->counter);
L
Linus Torvalds 已提交
1005 1006 1007 1008 1009 1010

	return 0;
}

static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
{
A
Al Viro 已提交
1011
	__be32 *p;
L
Linus Torvalds 已提交
1012

1013
	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
L
Linus Torvalds 已提交
1014
	WRITE32(OP_OPEN_DOWNGRADE);
1015
	WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1016
	WRITE32(arg->seqid->sequence->counter);
L
Linus Torvalds 已提交
1017 1018 1019 1020 1021 1022 1023 1024
	encode_share_access(xdr, arg->open_flags);
	return 0;
}

static int
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
	int len = fh->size;
A
Al Viro 已提交
1025
	__be32 *p;
L
Linus Torvalds 已提交
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036

	RESERVE_SPACE(8 + len);
	WRITE32(OP_PUTFH);
	WRITE32(len);
	WRITEMEM(fh->data, len);

	return 0;
}

static int encode_putrootfh(struct xdr_stream *xdr)
{
A
Al Viro 已提交
1037
        __be32 *p;
L
Linus Torvalds 已提交
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
        
        RESERVE_SPACE(4);
        WRITE32(OP_PUTROOTFH);

        return 0;
}

static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
{
	nfs4_stateid stateid;
A
Al Viro 已提交
1048
	__be32 *p;
L
Linus Torvalds 已提交
1049

1050
	RESERVE_SPACE(NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1051 1052
	if (ctx->state != NULL) {
		nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1053
		WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1054
	} else
1055
		WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1056 1057 1058 1059
}

static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
{
A
Al Viro 已提交
1060
	__be32 *p;
L
Linus Torvalds 已提交
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075

	RESERVE_SPACE(4);
	WRITE32(OP_READ);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(12);
	WRITE64(args->offset);
	WRITE32(args->count);

	return 0;
}

static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
{
1076
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1077 1078 1079 1080
	uint32_t attrs[2] = {
		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
L
Linus Torvalds 已提交
1081
	int replen;
A
Al Viro 已提交
1082
	__be32 *p;
L
Linus Torvalds 已提交
1083

1084
	RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
L
Linus Torvalds 已提交
1085 1086
	WRITE32(OP_READDIR);
	WRITE64(readdir->cookie);
1087
	WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1088 1089 1090
	WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
	WRITE32(readdir->count);
	WRITE32(2);
1091 1092 1093 1094 1095 1096 1097
	/* Switch to mounted_on_fileid if the server supports it */
	if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
		attrs[0] &= ~FATTR4_WORD0_FILEID;
	else
		attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
	WRITE32(attrs[0] & readdir->bitmask[0]);
	WRITE32(attrs[1] & readdir->bitmask[1]);
1098 1099 1100 1101 1102 1103 1104
	dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
			__FUNCTION__,
			(unsigned long long)readdir->cookie,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1],
			attrs[0] & readdir->bitmask[0],
			attrs[1] & readdir->bitmask[1]);
L
Linus Torvalds 已提交
1105 1106 1107 1108 1109 1110 1111 1112

	/* set up reply kvec
	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
	 *      + OP_READDIR + status + verifer(2)  = 9
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
			 readdir->pgbase, readdir->count);
1113 1114 1115
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
			__FUNCTION__, replen, readdir->pages,
			readdir->pgbase, readdir->count);
L
Linus Torvalds 已提交
1116 1117 1118 1119 1120 1121

	return 0;
}

static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
{
1122
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
L
Linus Torvalds 已提交
1123
	unsigned int replen;
A
Al Viro 已提交
1124
	__be32 *p;
L
Linus Torvalds 已提交
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141

	RESERVE_SPACE(4);
	WRITE32(OP_READLINK);

	/* set up reply kvec
	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
	 *      + OP_READLINK + status + string length = 8
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
			readlink->pgbase, readlink->pglen);
	
	return 0;
}

static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
{
A
Al Viro 已提交
1142
	__be32 *p;
L
Linus Torvalds 已提交
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153

	RESERVE_SPACE(8 + name->len);
	WRITE32(OP_REMOVE);
	WRITE32(name->len);
	WRITEMEM(name->name, name->len);

	return 0;
}

static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
{
A
Al Viro 已提交
1154
	__be32 *p;
L
Linus Torvalds 已提交
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167

	RESERVE_SPACE(8 + oldname->len);
	WRITE32(OP_RENAME);
	WRITE32(oldname->len);
	WRITEMEM(oldname->name, oldname->len);
	
	RESERVE_SPACE(4 + newname->len);
	WRITE32(newname->len);
	WRITEMEM(newname->name, newname->len);

	return 0;
}

1168
static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
L
Linus Torvalds 已提交
1169
{
A
Al Viro 已提交
1170
	__be32 *p;
L
Linus Torvalds 已提交
1171 1172 1173 1174 1175 1176 1177 1178

	RESERVE_SPACE(12);
	WRITE32(OP_RENEW);
	WRITE64(client_stateid->cl_clientid);

	return 0;
}

1179 1180 1181
static int
encode_restorefh(struct xdr_stream *xdr)
{
A
Al Viro 已提交
1182
	__be32 *p;
1183 1184 1185 1186 1187 1188 1189

	RESERVE_SPACE(4);
	WRITE32(OP_RESTOREFH);

	return 0;
}

1190 1191 1192
static int
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
{
A
Al Viro 已提交
1193
	__be32 *p;
1194

1195
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1196
	WRITE32(OP_SETATTR);
1197
	WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208
	RESERVE_SPACE(2*4);
	WRITE32(1);
	WRITE32(FATTR4_WORD0_ACL);
	if (arg->acl_len % 4)
		return -EINVAL;
	RESERVE_SPACE(4);
	WRITE32(arg->acl_len);
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
	return 0;
}

L
Linus Torvalds 已提交
1209 1210 1211
static int
encode_savefh(struct xdr_stream *xdr)
{
A
Al Viro 已提交
1212
	__be32 *p;
L
Linus Torvalds 已提交
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222

	RESERVE_SPACE(4);
	WRITE32(OP_SAVEFH);

	return 0;
}

static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
{
	int status;
A
Al Viro 已提交
1223
	__be32 *p;
L
Linus Torvalds 已提交
1224
	
1225
        RESERVE_SPACE(4+NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1226
        WRITE32(OP_SETATTR);
1227
	WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1228 1229 1230 1231 1232 1233 1234 1235 1236

        if ((status = encode_attrs(xdr, arg->iap, server)))
		return status;

        return 0;
}

static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
{
A
Al Viro 已提交
1237
	__be32 *p;
L
Linus Torvalds 已提交
1238

1239
	RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1240
	WRITE32(OP_SETCLIENTID);
1241
	WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
	RESERVE_SPACE(4);
	WRITE32(setclientid->sc_prog);
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
	RESERVE_SPACE(4);
	WRITE32(setclientid->sc_cb_ident);

	return 0;
}

1254
static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
L
Linus Torvalds 已提交
1255
{
A
Al Viro 已提交
1256
        __be32 *p;
L
Linus Torvalds 已提交
1257

1258
        RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1259 1260
        WRITE32(OP_SETCLIENTID_CONFIRM);
        WRITE64(client_state->cl_clientid);
1261
        WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1262 1263 1264 1265 1266 1267

        return 0;
}

static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
{
A
Al Viro 已提交
1268
	__be32 *p;
L
Linus Torvalds 已提交
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286

	RESERVE_SPACE(4);
	WRITE32(OP_WRITE);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(16);
	WRITE64(args->offset);
	WRITE32(args->stable);
	WRITE32(args->count);

	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);

	return 0;
}

static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
{
A
Al Viro 已提交
1287
	__be32 *p;
L
Linus Torvalds 已提交
1288

1289
	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1290 1291

	WRITE32(OP_DELEGRETURN);
1292
	WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
	return 0;

}
/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

/*
 * Encode an ACCESS request
 */
A
Al Viro 已提交
1303
static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
L
Linus Torvalds 已提交
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->fh)) == 0)
		status = encode_access(&xdr, args->access);
	return status;
}

/*
 * Encode LOOKUP request
 */
A
Al Viro 已提交
1321
static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
L
Linus Torvalds 已提交
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 4,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
	if ((status = encode_lookup(&xdr, args->name)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode LOOKUP_ROOT request
 */
A
Al Viro 已提交
1345
static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
L
Linus Torvalds 已提交
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 3,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) == 0)
		status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode REMOVE request
 */
A
Al Viro 已提交
1366
static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
L
Linus Torvalds 已提交
1367 1368 1369
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1370
		.nops = 3,
L
Linus Torvalds 已提交
1371 1372 1373 1374 1375
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
1376 1377 1378 1379 1380 1381
	if ((status = encode_putfh(&xdr, args->fh)) != 0)
		goto out;
	if ((status = encode_remove(&xdr, args->name)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
L
Linus Torvalds 已提交
1382 1383 1384 1385 1386 1387
	return status;
}

/*
 * Encode RENAME request
 */
A
Al Viro 已提交
1388
static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
L
Linus Torvalds 已提交
1389 1390 1391
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1392
		.nops = 7,
L
Linus Torvalds 已提交
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
		goto out;
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
	if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
		goto out;
1404 1405 1406 1407 1408 1409 1410
	if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
		goto out;
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1411 1412 1413 1414 1415 1416 1417
out:
	return status;
}

/*
 * Encode LINK request
 */
A
Al Viro 已提交
1418
static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
L
Linus Torvalds 已提交
1419 1420 1421
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1422
		.nops = 7,
L
Linus Torvalds 已提交
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->fh)) != 0)
		goto out;
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
1434 1435 1436 1437 1438 1439 1440
	if ((status = encode_link(&xdr, args->name)) != 0)
		goto out;
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1441 1442 1443 1444 1445 1446 1447
out:
	return status;
}

/*
 * Encode CREATE request
 */
A
Al Viro 已提交
1448
static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1449 1450 1451
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1452
		.nops = 7,
L
Linus Torvalds 已提交
1453 1454 1455 1456 1457 1458 1459
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
1460 1461
	if ((status = encode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
1462 1463 1464 1465
	if ((status = encode_create(&xdr, args)) != 0)
		goto out;
	if ((status = encode_getfh(&xdr)) != 0)
		goto out;
1466 1467 1468 1469
	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
		goto out;
	if ((status = encode_restorefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
1470 1471 1472 1473 1474 1475 1476 1477
	status = encode_getfattr(&xdr, args->bitmask);
out:
	return status;
}

/*
 * Encode SYMLINK request
 */
A
Al Viro 已提交
1478
static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1479 1480 1481 1482 1483 1484 1485
{
	return nfs4_xdr_enc_create(req, p, args);
}

/*
 * Encode GETATTR request
 */
A
Al Viro 已提交
1486
static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
L
Linus Torvalds 已提交
1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->fh)) == 0)
		status = encode_getfattr(&xdr, args->bitmask);
	return status;
}

/*
 * Encode a CLOSE request
 */
A
Al Viro 已提交
1504
static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1505 1506 1507
{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
1508
                .nops   = 3,
L
Linus Torvalds 已提交
1509 1510 1511 1512 1513 1514 1515 1516 1517
        };
        int status;

        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
        status = encode_putfh(&xdr, args->fh);
        if(status)
                goto out;
        status = encode_close(&xdr, args);
1518 1519 1520
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1521 1522 1523 1524 1525 1526 1527
out:
        return status;
}

/*
 * Encode an OPEN request
 */
A
Al Viro 已提交
1528
static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
1529 1530 1531
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1532
		.nops = 7,
L
Linus Torvalds 已提交
1533 1534 1535 1536 1537 1538
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
1539 1540 1541
	if (status)
		goto out;
	status = encode_savefh(&xdr);
L
Linus Torvalds 已提交
1542 1543 1544 1545 1546 1547 1548 1549 1550
	if (status)
		goto out;
	status = encode_open(&xdr, args);
	if (status)
		goto out;
	status = encode_getfh(&xdr);
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
1551 1552 1553 1554 1555 1556
	if (status)
		goto out;
	status = encode_restorefh(&xdr);
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1557 1558 1559 1560 1561 1562 1563
out:
	return status;
}

/*
 * Encode an OPEN_CONFIRM request
 */
A
Al Viro 已提交
1564
static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_open_confirm(&xdr, args);
out:
	return status;
}

/*
 * Encode an OPEN request with no attributes.
 */
A
Al Viro 已提交
1585
static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
L
Linus Torvalds 已提交
1586 1587 1588
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1589
		.nops   = 3,
L
Linus Torvalds 已提交
1590 1591 1592 1593 1594 1595 1596 1597 1598
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_open(&xdr, args);
1599 1600 1601
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1602 1603 1604 1605 1606 1607 1608
out:
	return status;
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
A
Al Viro 已提交
1609
static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1610 1611 1612
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1613
		.nops	= 3,
L
Linus Torvalds 已提交
1614 1615 1616 1617 1618 1619 1620 1621 1622
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_open_downgrade(&xdr, args);
1623 1624 1625
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1626 1627 1628 1629 1630 1631 1632
out:
	return status;
}

/*
 * Encode a LOCK request
 */
A
Al Viro 已提交
1633
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
L
Linus Torvalds 已提交
1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_lock(&xdr, args);
out:
	return status;
}

/*
 * Encode a LOCKT request
 */
A
Al Viro 已提交
1654
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_lockt(&xdr, args);
out:
	return status;
}

/*
 * Encode a LOCKU request
 */
A
Al Viro 已提交
1675
static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
L
Linus Torvalds 已提交
1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_locku(&xdr, args);
out:
	return status;
}

/*
 * Encode a READLINK request
 */
A
Al Viro 已提交
1696
static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_readlink(&xdr, args, req);
out:
	return status;
}

/*
 * Encode a READDIR request
 */
A
Al Viro 已提交
1717
static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if(status)
		goto out;
	status = encode_readdir(&xdr, args, req);
out:
	return status;
}

/*
 * Encode a READ request
 */
A
Al Viro 已提交
1738
static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
L
Linus Torvalds 已提交
1739
{
1740
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
L
Linus Torvalds 已提交
1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int replen, status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_read(&xdr, args);
	if (status)
		goto out;

	/* set up reply kvec
	 *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
	 *       + OP_READ + status + eof + datalen = 9
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen,
			 args->pages, args->pgbase, args->count);
out:
	return status;
}

/*
 * Encode an SETATTR request
 */
A
Al Viro 已提交
1770
static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791

{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
                .nops   = 3,
        };
        int status;

        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
        status = encode_putfh(&xdr, args->fh);
        if(status)
                goto out;
        status = encode_setattr(&xdr, args, args->server);
        if(status)
                goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
        return status;
}

1792 1793 1794 1795
/*
 * Encode a GETACL request
 */
static int
A
Al Viro 已提交
1796
nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1797 1798 1799
		struct nfs_getaclargs *args)
{
	struct xdr_stream xdr;
1800
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
	struct compound_hdr hdr = {
		.nops   = 2,
	};
	int replen, status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
	/* set up reply buffer: */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen,
		args->acl_pages, args->acl_pgbase, args->acl_len);
out:
	return status;
}

L
Linus Torvalds 已提交
1820 1821 1822
/*
 * Encode a WRITE request
 */
A
Al Viro 已提交
1823
static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
1824 1825 1826
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1827
		.nops = 3,
L
Linus Torvalds 已提交
1828 1829 1830 1831 1832 1833 1834 1835 1836
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_write(&xdr, args);
1837 1838 1839
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1840 1841 1842 1843 1844 1845 1846
out:
	return status;
}

/*
 *  a COMMIT request
 */
A
Al Viro 已提交
1847
static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
L
Linus Torvalds 已提交
1848 1849 1850
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
1851
		.nops = 3,
L
Linus Torvalds 已提交
1852 1853 1854 1855 1856 1857 1858 1859 1860
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status)
		goto out;
	status = encode_commit(&xdr, args);
1861 1862 1863
	if (status)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
L
Linus Torvalds 已提交
1864 1865 1866 1867 1868 1869 1870
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
1871
static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (!status)
		status = encode_fsinfo(&xdr, args->bitmask);
	return status;
}

/*
 * a PATHCONF request
 */
A
Al Viro 已提交
1890
static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (!status)
		status = encode_getattr_one(&xdr,
				args->bitmask[0] & nfs4_pathconf_bitmap[0]);
	return status;
}

/*
 * a STATFS request
 */
A
Al Viro 已提交
1910
static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, args->fh);
	if (status == 0)
		status = encode_getattr_two(&xdr,
				args->bitmask[0] & nfs4_statfs_bitmap[0],
				args->bitmask[1] & nfs4_statfs_bitmap[1]);
	return status;
}

/*
 * GETATTR_BITMAP request
 */
A
Al Viro 已提交
1931
static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
L
Linus Torvalds 已提交
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 2,
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_putfh(&xdr, fhandle);
	if (status == 0)
		status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
				FATTR4_WORD0_LINK_SUPPORT|
				FATTR4_WORD0_SYMLINK_SUPPORT|
				FATTR4_WORD0_ACLSUPPORT);
	return status;
}

/*
 * a RENEW request
 */
A
Al Viro 已提交
1953
static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 1,
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	return encode_renew(&xdr, clp);
}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
1968
static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 1,
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	return encode_setclientid(&xdr, sc);
}

/*
 * a SETCLIENTID_CONFIRM request
 */
A
Al Viro 已提交
1983
static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
L
Linus Torvalds 已提交
1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops	= 3,
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	status = encode_setclientid_confirm(&xdr, clp);
	if (!status)
		status = encode_putrootfh(&xdr);
	if (!status)
		status = encode_fsinfo(&xdr, lease_bitmap);
	return status;
}

/*
 * DELEGRETURN request
 */
A
Al Viro 已提交
2005
static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
L
Linus Torvalds 已提交
2006 2007 2008
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
2009
		.nops = 3,
L
Linus Torvalds 已提交
2010 2011 2012 2013 2014
	};
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
2015 2016 2017 2018 2019 2020 2021 2022
	status = encode_putfh(&xdr, args->fhandle);
	if (status != 0)
		goto out;
	status = encode_delegreturn(&xdr, args->stateid);
	if (status != 0)
		goto out;
	status = encode_getfattr(&xdr, args->bitmask);
out:
L
Linus Torvalds 已提交
2023 2024 2025
	return status;
}

2026 2027 2028
/*
 * Encode FS_LOCATIONS request
 */
A
Al Viro 已提交
2029
static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2030 2031 2032 2033 2034
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops = 3,
	};
2035
	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2036 2037 2038 2039 2040 2041 2042 2043 2044
	int replen;
	int status;

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, &hdr);
	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
		goto out;
	if ((status = encode_lookup(&xdr, args->name)) != 0)
		goto out;
2045
	if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2046 2047
		goto out;
	/* set up reply
2048
	 *   toplevel_status + OP_PUTFH + status
2049 2050 2051 2052 2053 2054 2055 2056 2057
	 *   + OP_LOOKUP + status + OP_GETATTR + status = 7
	 */
	replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
	xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
			0, PAGE_SIZE);
out:
	return status;
}

L
Linus Torvalds 已提交
2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084
/*
 * START OF "GENERIC" DECODE 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 READ32(x)         (x) = ntohl(*p++)
#define READ64(x)         do {			\
	(x) = (u64)ntohl(*p++) << 32;		\
	(x) |= ntohl(*p++);			\
} while (0)
#define READTIME(x)       do {			\
	p++;					\
	(x.tv_sec) = ntohl(*p++);		\
	(x.tv_nsec) = ntohl(*p++);		\
} while (0)
#define COPYMEM(x,nbytes) do {			\
	memcpy((x), p, nbytes);			\
	p += XDR_QUADLEN(nbytes);		\
} while (0)

#define READ_BUF(nbytes)  do { \
	p = xdr_inline_decode(xdr, nbytes); \
2085 2086 2087 2088 2089
	if (unlikely(!p)) { \
		printk(KERN_INFO "%s: prematurely hit end of receive" \
				" buffer\n", __FUNCTION__); \
		printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
				__FUNCTION__, xdr->p, nbytes, xdr->end); \
L
Linus Torvalds 已提交
2090 2091 2092 2093
		return -EIO; \
	} \
} while (0)

2094
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2095
{
A
Al Viro 已提交
2096
	__be32 *p;
L
Linus Torvalds 已提交
2097 2098 2099 2100 2101 2102 2103 2104 2105 2106

	READ_BUF(4);
	READ32(*len);
	READ_BUF(*len);
	*string = (char *)p;
	return 0;
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
2107
	__be32 *p;
L
Linus Torvalds 已提交
2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121

	READ_BUF(8);
	READ32(hdr->status);
	READ32(hdr->taglen);
	
	READ_BUF(hdr->taglen + 4);
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
	READ32(hdr->nops);
	return 0;
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2122
	__be32 *p;
L
Linus Torvalds 已提交
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != expected) {
		printk(KERN_NOTICE
				"nfs4_decode_op_hdr: Server returned operation"
			       	" %d but we issued a request for %d\n",
				opnum, expected);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr != NFS_OK)
2137
		return -nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2138 2139 2140 2141
	return 0;
}

/* Dummy routine */
2142
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2143
{
A
Al Viro 已提交
2144
	__be32 *p;
2145
	unsigned int strlen;
L
Linus Torvalds 已提交
2146 2147 2148 2149 2150 2151 2152 2153
	char *str;

	READ_BUF(12);
	return decode_opaque_inline(xdr, &strlen, &str);
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2154 2155
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169

	READ_BUF(4);
	READ32(bmlen);

	bitmap[0] = bitmap[1] = 0;
	READ_BUF((bmlen << 2));
	if (bmlen > 0) {
		READ32(bitmap[0]);
		if (bmlen > 1)
			READ32(bitmap[1]);
	}
	return 0;
}

A
Al Viro 已提交
2170
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2171
{
A
Al Viro 已提交
2172
	__be32 *p;
L
Linus Torvalds 已提交
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192

	READ_BUF(4);
	READ32(*attrlen);
	*savep = xdr->p;
	return 0;
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
		decode_attr_bitmap(xdr, bitmask);
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
	dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2193
	__be32 *p;
L
Linus Torvalds 已提交
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212

	*type = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
		READ_BUF(4);
		READ32(*type);
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
			dprintk("%s: bad type %d\n", __FUNCTION__, *type);
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
	}
	dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
	return 0;
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2213
	__be32 *p;
L
Linus Torvalds 已提交
2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229

	*change = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
		READ_BUF(8);
		READ64(*change);
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
	}
	dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
			(unsigned long long)*change);
	return 0;
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2230
	__be32 *p;
L
Linus Torvalds 已提交
2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245

	*size = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
		READ_BUF(8);
		READ64(*size);
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
	}
	dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
	return 0;
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2246
	__be32 *p;
L
Linus Torvalds 已提交
2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
	dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
	return 0;
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2262
	__be32 *p;
L
Linus Torvalds 已提交
2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
	dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
	return 0;
}

2276
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2277
{
A
Al Viro 已提交
2278
	__be32 *p;
L
Linus Torvalds 已提交
2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297

	fsid->major = 0;
	fsid->minor = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
		READ_BUF(16);
		READ64(fsid->major);
		READ64(fsid->minor);
		bitmap[0] &= ~FATTR4_WORD0_FSID;
	}
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
	return 0;
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2298
	__be32 *p;
L
Linus Torvalds 已提交
2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313

	*res = 60;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
	dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
	return 0;
}

static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2314
	__be32 *p;
L
Linus Torvalds 已提交
2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329

	*res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
		READ_BUF(4);
		READ32(*res);
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
	dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
	return 0;
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2330
	__be32 *p;
L
Linus Torvalds 已提交
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343

	*fileid = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
		READ_BUF(8);
		READ64(*fileid);
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
	}
	dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
	return 0;
}

2344 2345
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2346
	__be32 *p;
2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359

	*fileid = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
		READ_BUF(8);
		READ64(*fileid);
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
	}
	dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
	return 0;
}

L
Linus Torvalds 已提交
2360 2361
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2362
	__be32 *p;
L
Linus Torvalds 已提交
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
	dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2379
	__be32 *p;
L
Linus Torvalds 已提交
2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
	dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2396
	__be32 *p;
L
Linus Torvalds 已提交
2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
	dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

2411 2412 2413
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
	int n;
A
Al Viro 已提交
2414
	__be32 *p;
2415 2416 2417 2418
	int status = 0;

	READ_BUF(4);
	READ32(n);
2419
	if (n < 0)
2420
		goto out_eio;
2421 2422
	if (n == 0)
		goto root_path;
2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442
	dprintk("path ");
	path->ncomponents = 0;
	while (path->ncomponents < n) {
		struct nfs4_string *component = &path->components[path->ncomponents];
		status = decode_opaque_inline(xdr, &component->len, &component->data);
		if (unlikely(status != 0))
			goto out_eio;
		if (path->ncomponents != n)
			dprintk("/");
		dprintk("%s", component->data);
		if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
			path->ncomponents++;
		else {
			dprintk("cannot parse %d components in path\n", n);
			goto out_eio;
		}
	}
out:
	dprintk("\n");
	return status;
2443 2444 2445 2446 2447 2448 2449
root_path:
/* a root pathname is sent as a zero component4 */
	path->ncomponents = 1;
	path->components[0].len=0;
	path->components[0].data=NULL;
	dprintk("path /\n");
	goto out;
2450 2451 2452 2453 2454 2455 2456
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2457 2458
{
	int n;
A
Al Viro 已提交
2459
	__be32 *p;
2460 2461 2462 2463 2464 2465 2466
	int status = -EIO;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
		goto out;
	status = 0;
	if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
		goto out;
2467 2468
	dprintk("%s: fsroot ", __FUNCTION__);
	status = decode_pathname(xdr, &res->fs_path);
2469 2470 2471 2472 2473 2474 2475 2476
	if (unlikely(status != 0))
		goto out;
	READ_BUF(4);
	READ32(n);
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
2477 2478
		int m;
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2479

2480 2481 2482
		READ_BUF(4);
		READ32(m);
		if (m <= 0)
2483
			goto out_eio;
2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498

		loc->nservers = 0;
		dprintk("%s: servers ", __FUNCTION__);
		while (loc->nservers < m) {
			struct nfs4_string *server = &loc->servers[loc->nservers];
			status = decode_opaque_inline(xdr, &server->len, &server->data);
			if (unlikely(status != 0))
				goto out_eio;
			dprintk("%s ", server->data);
			if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
				loc->nservers++;
			else {
				int i;
				dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
2499
					unsigned int len;
2500 2501 2502 2503 2504 2505 2506 2507
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
2508 2509
		if (unlikely(status != 0))
			goto out_eio;
2510
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2511 2512 2513 2514 2515 2516 2517 2518 2519 2520
			res->nlocations++;
	}
out:
	dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
	return status;
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
2521 2522
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2523
	__be32 *p;
L
Linus Torvalds 已提交
2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
	dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
2540
	__be32 *p;
L
Linus Torvalds 已提交
2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556
	int status = 0;

	*maxlink = 1;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
		READ_BUF(4);
		READ32(*maxlink);
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
	dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
	return status;
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
2557
	__be32 *p;
L
Linus Torvalds 已提交
2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
	int status = 0;

	*maxname = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
		READ_BUF(4);
		READ32(*maxname);
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
	dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
	return status;
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2574
	__be32 *p;
L
Linus Torvalds 已提交
2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
		uint64_t maxread;
		READ_BUF(8);
		READ64(maxread);
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
	dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
	return status;
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2595
	__be32 *p;
L
Linus Torvalds 已提交
2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
		uint64_t maxwrite;
		READ_BUF(8);
		READ64(maxwrite);
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
	dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
	return status;
}

static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
{
A
Al Viro 已提交
2616
	__be32 *p;
L
Linus Torvalds 已提交
2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
		READ_BUF(4);
		READ32(*mode);
		*mode &= ~S_IFMT;
		bitmap[1] &= ~FATTR4_WORD1_MODE;
	}
	dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
	return 0;
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
2633
	__be32 *p;
L
Linus Torvalds 已提交
2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646

	*nlink = 1;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
		READ_BUF(4);
		READ32(*nlink);
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
	}
	dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
	return 0;
}

T
Trond Myklebust 已提交
2647
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
L
Linus Torvalds 已提交
2648
{
A
Al Viro 已提交
2649 2650
	uint32_t len;
	__be32 *p;
L
Linus Torvalds 已提交
2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671

	*uid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		if (len < XDR_MAX_NETOBJ) {
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
				dprintk("%s: nfs_map_name_to_uid failed!\n",
						__FUNCTION__);
		} else
			printk(KERN_WARNING "%s: name too long (%u)!\n",
					__FUNCTION__, len);
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
	dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
	return 0;
}

T
Trond Myklebust 已提交
2672
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
L
Linus Torvalds 已提交
2673
{
A
Al Viro 已提交
2674 2675
	uint32_t len;
	__be32 *p;
L
Linus Torvalds 已提交
2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698

	*gid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		if (len < XDR_MAX_NETOBJ) {
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
				dprintk("%s: nfs_map_group_to_gid failed!\n",
						__FUNCTION__);
		} else
			printk(KERN_WARNING "%s: name too long (%u)!\n",
					__FUNCTION__, len);
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
	dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
	return 0;
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
2699 2700
	uint32_t major = 0, minor = 0;
	__be32 *p;
L
Linus Torvalds 已提交
2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721

	*rdev = MKDEV(0,0);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
		dev_t tmp;

		READ_BUF(8);
		READ32(major);
		READ32(minor);
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
	}
	dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
	return 0;
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2722
	__be32 *p;
L
Linus Torvalds 已提交
2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
	dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2739
	__be32 *p;
L
Linus Torvalds 已提交
2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
	dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
2756
	__be32 *p;
L
Linus Torvalds 已提交
2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
		READ_BUF(8);
		READ64(*res);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
	dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
	return status;
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
2773
	__be32 *p;
L
Linus Torvalds 已提交
2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789

	*used = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
		READ_BUF(8);
		READ64(*used);
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
	}
	dprintk("%s: space used=%Lu\n", __FUNCTION__,
			(unsigned long long)*used);
	return 0;
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
2790
	__be32 *p;
L
Linus Torvalds 已提交
2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849
	uint64_t sec;
	uint32_t nsec;

	READ_BUF(12);
	READ64(sec);
	READ32(nsec);
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
}

static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
		status = decode_attr_time(xdr, time);
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
	dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
	return status;
}

static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
		status = decode_attr_time(xdr, time);
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
	dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
	return status;
}

static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
		status = decode_attr_time(xdr, time);
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
	dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
	return status;
}

A
Al Viro 已提交
2850
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
		printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
				__FUNCTION__,
				attrwords << 2,
				(attrwords < nwords) ? '<' : '>',
				nwords << 2);
		return -EIO;
	}
	return 0;
}

static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
2868
	__be32 *p;
L
Linus Torvalds 已提交
2869 2870 2871 2872 2873 2874 2875 2876 2877 2878

	READ_BUF(20);
	READ32(cinfo->atomic);
	READ64(cinfo->before);
	READ64(cinfo->after);
	return 0;
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
2879
	__be32 *p;
L
Linus Torvalds 已提交
2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
	READ_BUF(8);
	READ32(supp);
	READ32(acc);
	access->supported = supp;
	access->access = acc;
	return 0;
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
A
Al Viro 已提交
2896
	__be32 *p;
L
Linus Torvalds 已提交
2897 2898 2899 2900 2901
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
	if (status)
		return status;
2902 2903
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
2904 2905 2906 2907 2908
	return 0;
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
2909
	__be32 *p;
L
Linus Torvalds 已提交
2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(res->verf->verifier, 8);
	return 0;
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
2922
	__be32 *p;
L
Linus Torvalds 已提交
2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_CREATE);
	if (status)
		return status;
	if ((status = decode_change_info(xdr, cinfo)))
		return status;
	READ_BUF(4);
	READ32(bmlen);
	READ_BUF(bmlen << 2);
	return 0;
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
2939
	__be32 *savep;
L
Linus Torvalds 已提交
2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959
	uint32_t attrlen, 
		 bitmap[2] = {0};
	int status;

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;
	if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
		goto xdr_error;
	if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
		goto xdr_error;
	if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
		goto xdr_error;
	if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
		goto xdr_error;
	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
2960
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
2961 2962 2963 2964 2965
	return status;
}
	
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
2966
	__be32 *savep;
L
Linus Torvalds 已提交
2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992
	uint32_t attrlen, 
		 bitmap[2] = {0};
	int status;
	
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
2993
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
2994 2995 2996 2997 2998
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
2999
	__be32 *savep;
L
Linus Torvalds 已提交
3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017
	uint32_t attrlen, 
		 bitmap[2] = {0};
	int status;
	
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3018
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
3019 3020 3021 3022 3023
	return status;
}

static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
{
A
Al Viro 已提交
3024
	__be32 *savep;
L
Linus Torvalds 已提交
3025 3026 3027 3028
	uint32_t attrlen,
		 bitmap[2] = {0},
		 type;
	int status, fmode = 0;
3029
	uint64_t fileid;
L
Linus Torvalds 已提交
3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;

	fattr->bitmap[0] = bitmap[0];
	fattr->bitmap[1] = bitmap[1];

	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;


	if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
		goto xdr_error;
	fattr->type = nfs_type2fmt[type].nfs2type;
	fmode = nfs_type2fmt[type].mode;

	if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
		goto xdr_error;
	if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
		goto xdr_error;
3052
	if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
L
Linus Torvalds 已提交
3053 3054 3055
		goto xdr_error;
	if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
		goto xdr_error;
3056
	if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3057
						struct nfs4_fs_locations,
3058 3059
						fattr))) != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
3060 3061 3062 3063 3064
	if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
		goto xdr_error;
	fattr->mode |= fmode;
	if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
		goto xdr_error;
3065
	if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
L
Linus Torvalds 已提交
3066
		goto xdr_error;
3067
	if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
L
Linus Torvalds 已提交
3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078
		goto xdr_error;
	if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
		goto xdr_error;
	if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
		goto xdr_error;
	if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
		goto xdr_error;
	if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
		goto xdr_error;
3079 3080 3081 3082
	if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
		goto xdr_error;
	if (fattr->fileid == 0 && fileid != 0)
		fattr->fileid = fileid;
3083
	if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
L
Linus Torvalds 已提交
3084 3085
		fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
xdr_error:
3086
	dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
3087 3088 3089 3090 3091 3092
	return status;
}


static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
3093
	__be32 *savep;
L
Linus Torvalds 已提交
3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118
	uint32_t attrlen, bitmap[2];
	int status;

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	fsinfo->rtmult = fsinfo->wtmult = 512;	/* ??? */

	if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
		goto xdr_error;
	fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
		goto xdr_error;
	fsinfo->wtpref = fsinfo->wtmax;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3119
	dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
L
Linus Torvalds 已提交
3120 3121 3122 3123 3124
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
3125
	__be32 *p;
L
Linus Torvalds 已提交
3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157
	uint32_t len;
	int status;

	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

	READ_BUF(4);
	READ32(len);
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
	READ_BUF(len);
	COPYMEM(fh->data, len);
	return 0;
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
	
	status = decode_op_hdr(xdr, OP_LINK);
	if (status)
		return status;
	return decode_change_info(xdr, cinfo);
}

/*
 * We create the owner, so we know a proper owner.id length is 4.
 */
T
Trond Myklebust 已提交
3158
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
3159
{
T
Trond Myklebust 已提交
3160
	uint64_t offset, length, clientid;
A
Al Viro 已提交
3161
	__be32 *p;
T
Trond Myklebust 已提交
3162
	uint32_t namelen, type;
L
Linus Torvalds 已提交
3163 3164

	READ_BUF(32);
T
Trond Myklebust 已提交
3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178
	READ64(offset);
	READ64(length);
	READ32(type);
	if (fl != NULL) {
		fl->fl_start = (loff_t)offset;
		fl->fl_end = fl->fl_start + (loff_t)length - 1;
		if (length == ~(uint64_t)0)
			fl->fl_end = OFFSET_MAX;
		fl->fl_type = F_WRLCK;
		if (type & 1)
			fl->fl_type = F_RDLCK;
		fl->fl_pid = 0;
	}
	READ64(clientid);
L
Linus Torvalds 已提交
3179 3180 3181 3182 3183
	READ32(namelen);
	READ_BUF(namelen);
	return -NFS4ERR_DENIED;
}

T
Trond Myklebust 已提交
3184
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
3185
{
A
Al Viro 已提交
3186
	__be32 *p;
L
Linus Torvalds 已提交
3187 3188 3189 3190
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
	if (status == 0) {
3191 3192
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3193
	} else if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
3194
		return decode_lock_denied(xdr, NULL);
L
Linus Torvalds 已提交
3195 3196 3197
	return status;
}

T
Trond Myklebust 已提交
3198
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
3199 3200 3201 3202
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
3203
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
3204 3205 3206
	return status;
}

T
Trond Myklebust 已提交
3207
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
3208
{
A
Al Viro 已提交
3209
	__be32 *p;
L
Linus Torvalds 已提交
3210 3211 3212 3213
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
	if (status == 0) {
3214 3215
		READ_BUF(NFS4_STATEID_SIZE);
		COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227
	}
	return status;
}

static int decode_lookup(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_LOOKUP);
}

/* This is too sick! */
static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
{
A
Al Viro 已提交
3228
        __be32 *p;
L
Linus Torvalds 已提交
3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246
	uint32_t limit_type, nblocks, blocksize;

	READ_BUF(12);
	READ32(limit_type);
	switch (limit_type) {
		case 1:
			READ64(*maxsize);
			break;
		case 2:
			READ32(nblocks);
			READ32(blocksize);
			*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
	}
	return 0;
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Al Viro 已提交
3247
        __be32 *p;
L
Linus Torvalds 已提交
3248 3249 3250 3251 3252 3253 3254 3255
        uint32_t delegation_type;

	READ_BUF(4);
	READ32(delegation_type);
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
3256 3257
	READ_BUF(NFS4_STATEID_SIZE+4);
	COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3258 3259 3260 3261 3262 3263 3264 3265 3266 3267
	READ32(res->do_recall);
	switch (delegation_type) {
		case NFS4_OPEN_DELEGATE_READ:
			res->delegation_type = FMODE_READ;
			break;
		case NFS4_OPEN_DELEGATE_WRITE:
			res->delegation_type = FMODE_WRITE|FMODE_READ;
			if (decode_space_limit(xdr, &res->maxsize) < 0)
				return -EIO;
	}
3268
	return decode_ace(xdr, NULL, res->server->nfs_client);
L
Linus Torvalds 已提交
3269 3270 3271 3272
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Al Viro 已提交
3273
        __be32 *p;
3274
	uint32_t savewords, bmlen, i;
L
Linus Torvalds 已提交
3275 3276 3277 3278 3279
        int status;

        status = decode_op_hdr(xdr, OP_OPEN);
        if (status)
                return status;
3280 3281
        READ_BUF(NFS4_STATEID_SIZE);
        COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3282 3283 3284 3285 3286 3287 3288 3289 3290 3291

        decode_change_info(xdr, &res->cinfo);

        READ_BUF(8);
        READ32(res->rflags);
        READ32(bmlen);
        if (bmlen > 10)
                goto xdr_error;

        READ_BUF(bmlen << 2);
3292 3293 3294 3295 3296 3297
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
		READ32(res->attrset[i]);
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
3298 3299
	return decode_delegation(xdr, res);
xdr_error:
3300
	dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
L
Linus Torvalds 已提交
3301 3302 3303 3304 3305
	return -EIO;
}

static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
A
Al Viro 已提交
3306
        __be32 *p;
L
Linus Torvalds 已提交
3307 3308 3309 3310 3311
	int status;

        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
        if (status)
                return status;
3312 3313
        READ_BUF(NFS4_STATEID_SIZE);
        COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3314 3315 3316 3317 3318
        return 0;
}

static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
A
Al Viro 已提交
3319
	__be32 *p;
L
Linus Torvalds 已提交
3320 3321 3322 3323 3324
	int status;

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
	if (status)
		return status;
3325 3326
	READ_BUF(NFS4_STATEID_SIZE);
	COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342
	return 0;
}

static int decode_putfh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_PUTFH);
}

static int decode_putrootfh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_PUTROOTFH);
}

static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
{
	struct kvec *iov = req->rq_rcv_buf.head;
A
Al Viro 已提交
3343
	__be32 *p;
L
Linus Torvalds 已提交
3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372
	uint32_t count, eof, recvd, hdrlen;
	int status;

	status = decode_op_hdr(xdr, OP_READ);
	if (status)
		return status;
	READ_BUF(8);
	READ32(eof);
	READ32(count);
	hdrlen = (u8 *) p - (u8 *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
		printk(KERN_WARNING "NFS: server cheating in read reply: "
				"count %u > recvd %u\n", count, recvd);
		count = recvd;
		eof = 0;
	}
	xdr_read_pages(xdr, count);
	res->eof = eof;
	res->count = count;
	return 0;
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
	struct xdr_buf	*rcvbuf = &req->rq_rcv_buf;
	struct page	*page = *rcvbuf->pages;
	struct kvec	*iov = rcvbuf->head;
	unsigned int	nr, pglen = rcvbuf->page_len;
A
Al Viro 已提交
3373
	__be32		*end, *entry, *p, *kaddr;
3374
	uint32_t	len, attrlen, xlen;
L
Linus Torvalds 已提交
3375 3376 3377 3378 3379 3380 3381
	int 		hdrlen, recvd, status;

	status = decode_op_hdr(xdr, OP_READDIR);
	if (status)
		return status;
	READ_BUF(8);
	COPYMEM(readdir->verifier.data, 8);
3382 3383 3384 3385 3386
	dprintk("%s: verifier = 0x%x%x\n",
			__FUNCTION__,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
3387 3388 3389 3390 3391 3392 3393 3394

	hdrlen = (char *) p - (char *) iov->iov_base;
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

	BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
A
Al Viro 已提交
3395
	kaddr = p = kmap_atomic(page, KM_USER0);
3396
	end = p + ((pglen + readdir->pgbase) >> 2);
L
Linus Torvalds 已提交
3397 3398
	entry = p;
	for (nr = 0; *p++; nr++) {
3399
		if (end - p < 3)
L
Linus Torvalds 已提交
3400
			goto short_pkt;
3401
		dprintk("cookie = %Lu, ", *((unsigned long long *)p));
L
Linus Torvalds 已提交
3402 3403 3404 3405 3406 3407
		p += 2;			/* cookie */
		len = ntohl(*p++);	/* filename length */
		if (len > NFS4_MAXNAMLEN) {
			printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
			goto err_unmap;
		}
3408 3409
		xlen = XDR_QUADLEN(len);
		if (end - p < xlen + 1)
L
Linus Torvalds 已提交
3410
			goto short_pkt;
3411 3412
		dprintk("filename = %*s\n", len, (char *)p);
		p += xlen;
L
Linus Torvalds 已提交
3413
		len = ntohl(*p++);	/* bitmap length */
3414
		if (end - p < len + 1)
L
Linus Torvalds 已提交
3415
			goto short_pkt;
3416
		p += len;
L
Linus Torvalds 已提交
3417
		attrlen = XDR_QUADLEN(ntohl(*p++));
3418
		if (end - p < attrlen + 2)
L
Linus Torvalds 已提交
3419
			goto short_pkt;
3420
		p += attrlen;		/* attributes */
L
Linus Torvalds 已提交
3421 3422 3423 3424 3425 3426 3427 3428
		entry = p;
	}
	if (!nr && (entry[0] != 0 || entry[1] == 0))
		goto short_pkt;
out:	
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
short_pkt:
3429
	dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
L
Linus Torvalds 已提交
3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446
	entry[0] = entry[1] = 0;
	/* truncate listing ? */
	if (!nr) {
		printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
		entry[1] = 1;
	}
	goto out;
err_unmap:
	kunmap_atomic(kaddr, KM_USER0);
	return -errno_NFSERR_IO;
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
	struct kvec *iov = rcvbuf->head;
	int hdrlen, len, recvd;
A
Al Viro 已提交
3447
	__be32 *p;
L
Linus Torvalds 已提交
3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514
	char *kaddr;
	int status;

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

	/* Convert length of symlink */
	READ_BUF(4);
	READ32(len);
	if (len >= rcvbuf->page_len || len <= 0) {
		dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
		printk(KERN_WARNING "NFS: server cheating in readlink reply: "
				"count %u > recvd %u\n", len, recvd);
		return -EIO;
	}
	xdr_read_pages(xdr, len);
	/*
	 * The XDR encode routine has set things up so that
	 * the link text will be copied directly into the
	 * buffer.  We just have to do overflow-checking,
	 * and and null-terminate the text (the VFS expects
	 * null-termination).
	 */
	kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
	kaddr[len+rcvbuf->page_base] = '\0';
	kunmap_atomic(kaddr, KM_USER0);
	return 0;
}

static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_REMOVE);
	if (status)
		goto out;
	status = decode_change_info(xdr, cinfo);
out:
	return status;
}

static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
	      struct nfs4_change_info *new_cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_RENAME);
	if (status)
		goto out;
	if ((status = decode_change_info(xdr, old_cinfo)))
		goto out;
	status = decode_change_info(xdr, new_cinfo);
out:
	return status;
}

static int decode_renew(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RENEW);
}

3515 3516 3517 3518 3519 3520
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

3521 3522 3523
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
3524
	__be32 *savep;
3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552
	uint32_t attrlen,
		 bitmap[2] = {0};
	struct kvec *iov = req->rq_rcv_buf.head;
	int status;

	*acl_len = 0;
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto out;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto out;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto out;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
		int hdrlen, recvd;

		/* We ignore &savep and don't do consistency checks on
		 * the attr length.  Let userspace figure it out.... */
		hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
		recvd = req->rq_rcv_buf.len - hdrlen;
		if (attrlen > recvd) {
			printk(KERN_WARNING "NFS: server cheating in getattr"
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
3553
		xdr_read_pages(xdr, attrlen);
3554
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
3555 3556
	} else
		status = -EOPNOTSUPP;
3557 3558 3559 3560 3561

out:
	return status;
}

L
Linus Torvalds 已提交
3562 3563 3564 3565 3566 3567 3568 3569
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
{
A
Al Viro 已提交
3570
	__be32 *p;
L
Linus Torvalds 已提交
3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583
	uint32_t bmlen;
	int status;

        
	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
	READ_BUF(4);
	READ32(bmlen);
	READ_BUF(bmlen << 2);
	return 0;
}

3584
static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
L
Linus Torvalds 已提交
3585
{
A
Al Viro 已提交
3586
	__be32 *p;
L
Linus Torvalds 已提交
3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599
	uint32_t opnum;
	int32_t nfserr;

	READ_BUF(8);
	READ32(opnum);
	if (opnum != OP_SETCLIENTID) {
		printk(KERN_NOTICE
				"nfs4_decode_setclientid: Server returned operation"
			       	" %d\n", opnum);
		return -EIO;
	}
	READ32(nfserr);
	if (nfserr == NFS_OK) {
3600
		READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3601
		READ64(clp->cl_clientid);
3602
		COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);

		/* skip uaddr string */
		READ_BUF(4);
		READ32(len);
		READ_BUF(len);
		return -NFSERR_CLID_INUSE;
	} else
3617
		return -nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628

	return 0;
}

static int decode_setclientid_confirm(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
}

static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
3629
	__be32 *p;
L
Linus Torvalds 已提交
3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650
	int status;

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

	READ_BUF(16);
	READ32(res->count);
	READ32(res->verf->committed);
	COPYMEM(res->verf->verifier, 8);
	return 0;
}

static int decode_delegreturn(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_DELEGRETURN);
}

/*
 * Decode OPEN_DOWNGRADE response
 */
A
Al Viro 已提交
3651
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open_downgrade(&xdr, res);
3665 3666 3667
	if (status != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678
out:
        return status;
}

/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

/*
 * Decode ACCESS response
 */
A
Al Viro 已提交
3679
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
L
Linus Torvalds 已提交
3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) == 0)
		status = decode_access(&xdr, res);
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
A
Al Viro 已提交
3697
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_lookup(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
A
Al Viro 已提交
3720
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putrootfh(&xdr)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) == 0)
		status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;
}

/*
 * Decode REMOVE response
 */
A
Al Viro 已提交
3740
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
L
Linus Torvalds 已提交
3741 3742 3743 3744 3745 3746 3747 3748
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
3749 3750 3751 3752 3753
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
		goto out;
	decode_getfattr(&xdr, res->dir_attr, res->server);
L
Linus Torvalds 已提交
3754 3755 3756 3757 3758 3759 3760
out:
	return status;
}

/*
 * Decode RENAME response
 */
A
Al Viro 已提交
3761
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
L
Linus Torvalds 已提交
3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
3776 3777 3778 3779 3780 3781 3782 3783
	if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
		goto out;
	/* Current FH is target directory */
	if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->old_fattr, res->server);
L
Linus Torvalds 已提交
3784 3785 3786 3787 3788 3789 3790
out:
	return status;
}

/*
 * Decode LINK response
 */
A
Al Viro 已提交
3791
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
L
Linus Torvalds 已提交
3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816
	if ((status = decode_link(&xdr, &res->cinfo)) != 0)
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
	if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3817 3818 3819 3820 3821 3822 3823
out:
	return status;
}

/*
 * Decode CREATE response
 */
A
Al Viro 已提交
3824
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3825 3826 3827 3828 3829 3830 3831 3832 3833 3834
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
3835 3836
	if ((status = decode_savefh(&xdr)) != 0)
		goto out;
L
Linus Torvalds 已提交
3837 3838 3839 3840
	if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
		goto out;
	if ((status = decode_getfh(&xdr, res->fh)) != 0)
		goto out;
3841 3842 3843 3844 3845
	if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->dir_fattr, res->server);
L
Linus Torvalds 已提交
3846 3847 3848 3849 3850 3851 3852
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
A
Al Viro 已提交
3853
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
L
Linus Torvalds 已提交
3854 3855 3856 3857 3858 3859 3860
{
	return nfs4_xdr_dec_create(rqstp, p, res);
}

/*
 * Decode GETATTR response
 */
A
Al Viro 已提交
3861
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;
	
	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
out:
	return status;

}

3880 3881 3882 3883
/*
 * Encode an SETACL request
 */
static int
A
Al Viro 已提交
3884
nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904
{
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
                .nops   = 2,
        };
        int status;

        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
        status = encode_putfh(&xdr, args->fh);
        if (status)
                goto out;
        status = encode_setacl(&xdr, args);
out:
        return status;
}
/*
 * Decode SETACL response
 */
static int
A
Al Viro 已提交
3905
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_setattr(&xdr, res);
out:
	return status;
}
L
Linus Torvalds 已提交
3922

3923 3924 3925 3926
/*
 * Decode GETACL response
 */
static int
A
Al Viro 已提交
3927
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_getacl(&xdr, rqstp, acl_len);

out:
	return status;
}

L
Linus Torvalds 已提交
3946 3947 3948
/*
 * Decode CLOSE response
 */
A
Al Viro 已提交
3949
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
L
Linus Torvalds 已提交
3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_close(&xdr, res);
3963 3964 3965 3966 3967 3968 3969 3970 3971
	if (status != 0)
		goto out;
	/*
	 * Note: Server may do delete on close for this file
	 * 	in which case the getattr call will fail with
	 * 	an ESTALE error. Shouldn't be a problem,
	 * 	though, since fattr->valid will remain unset.
	 */
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
3972 3973 3974 3975 3976 3977 3978
out:
        return status;
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
3979
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
3992 3993 3994
        status = decode_savefh(&xdr);
	if (status)
		goto out;
L
Linus Torvalds 已提交
3995 3996 3997 3998 3999 4000
        status = decode_open(&xdr, res);
        if (status)
                goto out;
	status = decode_getfh(&xdr, &res->fh);
        if (status)
		goto out;
4001 4002 4003 4004 4005
	if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
		goto out;
	if ((status = decode_restorefh(&xdr)) != 0)
		goto out;
	decode_getfattr(&xdr, res->dir_attr, res->server);
L
Linus Torvalds 已提交
4006 4007 4008 4009 4010 4011 4012
out:
        return status;
}

/*
 * Decode OPEN_CONFIRM response
 */
A
Al Viro 已提交
4013
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open_confirm(&xdr, res);
out:
        return status;
}

/*
 * Decode OPEN response
 */
A
Al Viro 已提交
4034
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
L
Linus Torvalds 已提交
4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_open(&xdr, res);
4048 4049 4050
        if (status)
                goto out;
	decode_getfattr(&xdr, res->f_attr, res->server);
L
Linus Torvalds 已提交
4051 4052 4053 4054 4055 4056 4057
out:
        return status;
}

/*
 * Decode SETATTR response
 */
A
Al Viro 已提交
4058
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
L
Linus Torvalds 已提交
4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083
{
        struct xdr_stream xdr;
        struct compound_hdr hdr;
        int status;

        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
        if (status)
                goto out;
        status = decode_putfh(&xdr);
        if (status)
                goto out;
        status = decode_setattr(&xdr, res);
        if (status)
                goto out;
	status = decode_getfattr(&xdr, res->fattr, res->server);
	if (status == NFS4ERR_DELAY)
		status = 0;
out:
        return status;
}

/*
 * Decode LOCK response
 */
A
Al Viro 已提交
4084
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_lock(&xdr, res);
out:
	return status;
}

/*
 * Decode LOCKT response
 */
A
Al Viro 已提交
4105
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_lockt(&xdr, res);
out:
	return status;
}

/*
 * Decode LOCKU response
 */
A
Al Viro 已提交
4126
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_locku(&xdr, res);
out:
	return status;
}

/*
 * Decode READLINK response
 */
A
Al Viro 已提交
4147
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
L
Linus Torvalds 已提交
4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_readlink(&xdr, rqstp);
out:
	return status;
}

/*
 * Decode READDIR response
 */
A
Al Viro 已提交
4168
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_readdir(&xdr, rqstp, res);
out:
	return status;
}

/*
 * Decode Read response
 */
A
Al Viro 已提交
4189
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
L
Linus Torvalds 已提交
4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_read(&xdr, rqstp, res);
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode WRITE response
 */
A
Al Viro 已提交
4212
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_write(&xdr, res);
4226 4227 4228
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4229 4230 4231 4232 4233 4234 4235 4236 4237
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
A
Al Viro 已提交
4238
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
L
Linus Torvalds 已提交
4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status)
		goto out;
	status = decode_putfh(&xdr);
	if (status)
		goto out;
	status = decode_commit(&xdr, res);
4252 4253 4254
	if (status)
		goto out;
	decode_getfattr(&xdr, res->fattr, res->server);
L
Linus Torvalds 已提交
4255 4256 4257 4258 4259 4260 4261
out:
	return status;
}

/*
 * FSINFO request
 */
A
Al Viro 已提交
4262
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, fsinfo);
	if (!status)
4275
		status = -nfs4_stat_to_errno(hdr.status);
L
Linus Torvalds 已提交
4276 4277 4278 4279 4280 4281
	return status;
}

/*
 * PATHCONF request
 */
A
Al Viro 已提交
4282
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
L
Linus Torvalds 已提交
4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_pathconf(&xdr, pathconf);
	return status;
}

/*
 * STATFS request
 */
A
Al Viro 已提交
4300
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
L
Linus Torvalds 已提交
4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_putfh(&xdr);
	if (!status)
		status = decode_statfs(&xdr, fsstat);
	return status;
}

/*
 * GETATTR_BITMAP request
 */
A
Al Viro 已提交
4318
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
L
Linus Torvalds 已提交
4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	status = decode_server_caps(&xdr, res);
out:
	return status;
}

/*
 * Decode RENEW response
 */
A
Al Viro 已提交
4337
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_renew(&xdr);
	return status;
}

/*
 * a SETCLIENTID request
 */
A
Al Viro 已提交
4353
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4354
		struct nfs_client *clp)
L
Linus Torvalds 已提交
4355 4356 4357 4358 4359 4360 4361 4362 4363 4364
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_setclientid(&xdr, clp);
	if (!status)
4365
		status = -nfs4_stat_to_errno(hdr.status);
L
Linus Torvalds 已提交
4366 4367 4368 4369 4370 4371
	return status;
}

/*
 * a SETCLIENTID_CONFIRM request
 */
A
Al Viro 已提交
4372
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (!status)
		status = decode_setclientid_confirm(&xdr);
	if (!status)
		status = decode_putrootfh(&xdr);
	if (!status)
		status = decode_fsinfo(&xdr, fsinfo);
	if (!status)
4387
		status = -nfs4_stat_to_errno(hdr.status);
L
Linus Torvalds 已提交
4388 4389 4390 4391 4392 4393
	return status;
}

/*
 * DELEGRETURN request
 */
A
Al Viro 已提交
4394
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
4395 4396 4397 4398 4399 4400 4401
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
4402 4403 4404 4405 4406 4407 4408 4409
	if (status != 0)
		goto out;
	status = decode_putfh(&xdr);
	if (status != 0)
		goto out;
	status = decode_delegreturn(&xdr);
	decode_getfattr(&xdr, res->fattr, res->server);
out:
L
Linus Torvalds 已提交
4410 4411 4412
	return status;
}

4413 4414 4415
/*
 * FS_LOCATIONS request
 */
A
Al Viro 已提交
4416
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435
{
	struct xdr_stream xdr;
	struct compound_hdr hdr;
	int status;

	xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
	status = decode_compound_hdr(&xdr, &hdr);
	if (status != 0)
		goto out;
	if ((status = decode_putfh(&xdr)) != 0)
		goto out;
	if ((status = decode_lookup(&xdr)) != 0)
		goto out;
	xdr_enter_page(&xdr, PAGE_SIZE);
	status = decode_getfattr(&xdr, &res->fattr, res->server);
out:
	return status;
}

4436
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
L
Linus Torvalds 已提交
4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470
{
	uint32_t bitmap[2] = {0};
	uint32_t len;

	if (!*p++) {
		if (!*p)
			return ERR_PTR(-EAGAIN);
		entry->eof = 1;
		return ERR_PTR(-EBADCOOKIE);
	}

	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
	entry->name = (const char *) p;
	p += XDR_QUADLEN(entry->len);

	/*
	 * In case the server doesn't return an inode number,
	 * we fake one here.  (We don't use inode number 0,
	 * since glibc seems to choke on it...)
	 */
	entry->ino = 1;

	len = ntohl(*p++);		/* bitmap length */
	if (len-- > 0) {
		bitmap[0] = ntohl(*p++);
		if (len-- > 0) {
			bitmap[1] = ntohl(*p++);
			p += len;
		}
	}
	len = XDR_QUADLEN(ntohl(*p++));	/* attribute buffer length */
	if (len > 0) {
4471 4472 4473 4474 4475 4476
		if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
			bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
			/* Ignore the return value of rdattr_error for now */
			p++;
			len--;
		}
L
Linus Torvalds 已提交
4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515
		if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		else if (bitmap[0] == FATTR4_WORD0_FILEID)
			xdr_decode_hyper(p, &entry->ino);
		p += len;
	}

	entry->eof = !p[0] && p[1];
	return p;
}

/*
 * We need to translate between nfs status return values and
 * the local errno values which may not be the same.
 */
static struct {
	int stat;
	int errno;
} nfs_errtbl[] = {
	{ NFS4_OK,		0		},
	{ NFS4ERR_PERM,		EPERM		},
	{ NFS4ERR_NOENT,	ENOENT		},
	{ NFS4ERR_IO,		errno_NFSERR_IO	},
	{ NFS4ERR_NXIO,		ENXIO		},
	{ NFS4ERR_ACCESS,	EACCES		},
	{ NFS4ERR_EXIST,	EEXIST		},
	{ NFS4ERR_XDEV,		EXDEV		},
	{ NFS4ERR_NOTDIR,	ENOTDIR		},
	{ NFS4ERR_ISDIR,	EISDIR		},
	{ NFS4ERR_INVAL,	EINVAL		},
	{ NFS4ERR_FBIG,		EFBIG		},
	{ NFS4ERR_NOSPC,	ENOSPC		},
	{ NFS4ERR_ROFS,		EROFS		},
	{ NFS4ERR_MLINK,	EMLINK		},
	{ NFS4ERR_NAMETOOLONG,	ENAMETOOLONG	},
	{ NFS4ERR_NOTEMPTY,	ENOTEMPTY	},
	{ NFS4ERR_DQUOT,	EDQUOT		},
	{ NFS4ERR_STALE,	ESTALE		},
	{ NFS4ERR_BADHANDLE,	EBADHANDLE	},
4516 4517
	{ NFS4ERR_BADOWNER,	EINVAL		},
	{ NFS4ERR_BADNAME,	EINVAL		},
L
Linus Torvalds 已提交
4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539
	{ NFS4ERR_BAD_COOKIE,	EBADCOOKIE	},
	{ NFS4ERR_NOTSUPP,	ENOTSUPP	},
	{ NFS4ERR_TOOSMALL,	ETOOSMALL	},
	{ NFS4ERR_SERVERFAULT,	ESERVERFAULT	},
	{ NFS4ERR_BADTYPE,	EBADTYPE	},
	{ NFS4ERR_LOCKED,	EAGAIN		},
	{ NFS4ERR_RESOURCE,	EREMOTEIO	},
	{ NFS4ERR_SYMLINK,	ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	EDEADLK		},
	{ NFS4ERR_WRONGSEC,	EPERM		}, /* FIXME: this needs
						    * to be handled by a
						    * middle-layer.
						    */
	{ -1,			EIO		}
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
4540
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563
{
	int i;
	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
		if (nfs_errtbl[i].stat == stat)
			return nfs_errtbl[i].errno;
	}
	if (stat <= 10000 || stat > 10100) {
		/* The server is looney tunes. */
		return ESERVERFAULT;
	}
	/* If we cannot translate the error, the recovery routines should
	 * handle it.
	 * Note: remaining NFSv4 error codes have values > 10000, so should
	 * not conflict with native Linux error codes.
	 */
	return stat;
}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
	.p_encode = (kxdrproc_t) nfs4_xdr_##argtype,		\
	.p_decode = (kxdrproc_t) nfs4_xdr_##restype,		\
4564 4565
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
4566 4567
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
L
Linus Torvalds 已提交
4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601
    }

struct rpc_procinfo	nfs4_procedures[] = {
  PROC(READ,		enc_read,	dec_read),
  PROC(WRITE,		enc_write,	dec_write),
  PROC(COMMIT,		enc_commit,	dec_commit),
  PROC(OPEN,		enc_open,	dec_open),
  PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
  PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
  PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
  PROC(CLOSE,		enc_close,	dec_close),
  PROC(SETATTR,		enc_setattr,	dec_setattr),
  PROC(FSINFO,		enc_fsinfo,	dec_fsinfo),
  PROC(RENEW,		enc_renew,	dec_renew),
  PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
  PROC(SETCLIENTID_CONFIRM,	enc_setclientid_confirm,	dec_setclientid_confirm),
  PROC(LOCK,            enc_lock,       dec_lock),
  PROC(LOCKT,           enc_lockt,      dec_lockt),
  PROC(LOCKU,           enc_locku,      dec_locku),
  PROC(ACCESS,		enc_access,	dec_access),
  PROC(GETATTR,		enc_getattr,	dec_getattr),
  PROC(LOOKUP,		enc_lookup,	dec_lookup),
  PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
  PROC(REMOVE,		enc_remove,	dec_remove),
  PROC(RENAME,		enc_rename,	dec_rename),
  PROC(LINK,		enc_link,	dec_link),
  PROC(SYMLINK,		enc_symlink,	dec_symlink),
  PROC(CREATE,		enc_create,	dec_create),
  PROC(PATHCONF,	enc_pathconf,	dec_pathconf),
  PROC(STATFS,		enc_statfs,	dec_statfs),
  PROC(READLINK,	enc_readlink,	dec_readlink),
  PROC(READDIR,		enc_readdir,	dec_readdir),
  PROC(SERVER_CAPS,	enc_server_caps, dec_server_caps),
  PROC(DELEGRETURN,	enc_delegreturn, dec_delegreturn),
4602
  PROC(GETACL,		enc_getacl,	dec_getacl),
4603
  PROC(SETACL,		enc_setacl,	dec_setacl),
4604
  PROC(FS_LOCATIONS,	enc_fs_locations, dec_fs_locations),
L
Linus Torvalds 已提交
4605 4606 4607 4608
};

struct rpc_version		nfs_version4 = {
	.number			= 4,
4609
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
4610 4611 4612 4613 4614 4615 4616 4617
	.procs			= nfs4_procedures
};

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */