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Merge branch 'gpio-key-wakeup-fix' into omap-for-v4.11/fixes
[linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <[email protected]>
8 * Andy Adamson <[email protected]>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
47057abd 36#include <linux/fs_struct.h>
96bcad50 37#include <linux/file.h>
5a0e3ad6 38#include <linux/slab.h>
1da177e4 39#include <linux/namei.h>
341eb184 40#include <linux/statfs.h>
0733d213 41#include <linux/utsname.h>
17456804 42#include <linux/pagemap.h>
4796f457 43#include <linux/sunrpc/svcauth_gss.h>
9a74af21 44
2ca72e17
BF		 45#include "idmap.h"
46#include "acl.h"
9a74af21 47#include "xdr4.h"
0a3adade 48#include "vfs.h"
17456804 49#include "state.h"
1091006c 50#include "cache.h"
3d733711 51#include "netns.h"
9cf514cc 52#include "pnfs.h"
2ca72e17 53
18032ca0
DQ		 54#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
55#include <linux/security.h>
56#endif
57
58
1da177e4
LT		 59#define NFSDDBG_FACILITY NFSDDBG_XDR
60
916d2d84
BF		 61u32 nfsd_suppattrs[3][3] = {
62 {NFSD4_SUPPORTED_ATTRS_WORD0,
63 NFSD4_SUPPORTED_ATTRS_WORD1,
64 NFSD4_SUPPORTED_ATTRS_WORD2},
65
66 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
67 NFSD4_1_SUPPORTED_ATTRS_WORD1,
68 NFSD4_1_SUPPORTED_ATTRS_WORD2},
69
70 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
71 NFSD4_1_SUPPORTED_ATTRS_WORD1,
72 NFSD4_2_SUPPORTED_ATTRS_WORD2},
73};
74
42ca0993
BF		 75/*
76 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
77 * directory in order to indicate to the client that a filesystem boundary is present
78 * We use a fixed fsid for a referral
79 */
80#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
81#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
82
b37ad28b 83static __be32
a36b1725 84check_filename(char *str, int len)
1da177e4
LT		 85{
86 int i;
87
88 if (len == 0)
89 return nfserr_inval;
90 if (isdotent(str, len))
a36b1725 91 return nfserr_badname;
1da177e4
LT		 92 for (i = 0; i < len; i++)
93 if (str[i] == '/')
a36b1725 94 return nfserr_badname;
1da177e4
LT		 95 return 0;
96}
97
1da177e4 98#define DECODE_HEAD \
2ebbc012 99 __be32 *p; \
b37ad28b 100 __be32 status
1da177e4
LT		 101#define DECODE_TAIL \
102 status = 0; \
103out: \
104 return status; \
105xdr_error: \
817cb9d4
CL		 106 dprintk("NFSD: xdr error (%s:%d)\n", \
107 __FILE__, __LINE__); \
1da177e4
LT		 108 status = nfserr_bad_xdr; \
109 goto out
110
1da177e4
LT		 111#define READMEM(x,nbytes) do { \
112 x = (char *)p; \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
118 (char *)p)) { \
817cb9d4
CL		 119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
1da177e4
LT		 121 goto xdr_error; \
122 } \
123 p += XDR_QUADLEN(nbytes); \
124} while (0)
125#define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
128} while (0)
129
130/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131#define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 p = argp->p; \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
1da177e4
LT		 138 goto xdr_error; \
139 } \
140} while (0)
141
590b7431
BF		 142static void next_decode_page(struct nfsd4_compoundargs *argp)
143{
590b7431 144 argp->p = page_address(argp->pagelist[0]);
365da4ad 145 argp->pagelist++;
590b7431
BF		 146 if (argp->pagelen < PAGE_SIZE) {
147 argp->end = argp->p + (argp->pagelen>>2);
148 argp->pagelen = 0;
149 } else {
150 argp->end = argp->p + (PAGE_SIZE>>2);
151 argp->pagelen -= PAGE_SIZE;
152 }
153}
154
ca2a05aa 155static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 156{
157 /* We want more bytes than seem to be available.
158 * Maybe we need a new page, maybe we have just run out
159 */
ca2a05aa 160 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 161 __be32 *p;
1da177e4
LT		 162 if (avail + argp->pagelen < nbytes)
163 return NULL;
164 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
165 return NULL;
166 /* ok, we can do it with the current plus the next page */
167 if (nbytes <= sizeof(argp->tmp))
168 p = argp->tmp;
169 else {
f99d49ad 170 kfree(argp->tmpp);
1da177e4
LT		 171 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
172 if (!p)
173 return NULL;
174
175 }
ca2a05aa
BF		 176 /*
177 * The following memcpy is safe because read_buf is always
178 * called with nbytes > avail, and the two cases above both
179 * guarantee p points to at least nbytes bytes.
180 */
1da177e4 181 memcpy(p, argp->p, avail);
590b7431 182 next_decode_page(argp);
1da177e4
LT		 183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
184 argp->p += XDR_QUADLEN(nbytes - avail);
185 return p;
186}
187
60adfc50
AA		 188static int zero_clientid(clientid_t *clid)
189{
190 return (clid->cl_boot == 0) && (clid->cl_id == 0);
191}
192
2d8498db 193/**
d5e23383 194 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 195 * @argp: NFSv4 compound argument structure
196 * @p: pointer to be freed (with kfree())
2d8498db
CH		 197 *
198 * Marks @p to be freed when processing the compound operation
199 * described in @argp finishes.
200 */
d5e23383
BF		 201static void *
202svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 203{
d5e23383 204 struct svcxdr_tmpbuf *tb;
1da177e4 205
d5e23383 206 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 207 if (!tb)
d5e23383 208 return NULL;
1da177e4
LT		 209 tb->next = argp->to_free;
210 argp->to_free = tb;
d5e23383 211 return tb->buf;
1da177e4
LT		 212}
213
29c353b3
BF		 214/*
215 * For xdr strings that need to be passed to other kernel api's
216 * as null-terminated strings.
217 *
218 * Note null-terminating in place usually isn't safe since the
219 * buffer might end on a page boundary.
220 */
221static char *
222svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
223{
d5e23383 224 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 225
226 if (!p)
227 return NULL;
228 memcpy(p, buf, len);
229 p[len] = '\0';
29c353b3 230 return p;
1da177e4
LT		 231}
232
2d8498db
CH		 233/**
234 * savemem - duplicate a chunk of memory for later processing
235 * @argp: NFSv4 compound argument structure to be freed with
236 * @p: pointer to be duplicated
237 * @nbytes: length to be duplicated
238 *
239 * Returns a pointer to a copy of @nbytes bytes of memory at @p
240 * that are preserved until processing of the NFSv4 compound
241 * operation described by @argp finishes.
242 */
2ebbc012 243static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 244{
d5e23383
BF		 245 void *ret;
246
247 ret = svcxdr_tmpalloc(argp, nbytes);
248 if (!ret)
1da177e4 249 return NULL;
d5e23383
BF		 250 memcpy(ret, p, nbytes);
251 return ret;
1da177e4
LT		 252}
253
4c94e13e
CH		 254/*
255 * We require the high 32 bits of 'seconds' to be 0, and
256 * we ignore all 32 bits of 'nseconds'.
257 */
258static __be32
259nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
260{
261 DECODE_HEAD;
262 u64 sec;
263
264 READ_BUF(12);
265 p = xdr_decode_hyper(p, &sec);
266 tv->tv_sec = sec;
267 tv->tv_nsec = be32_to_cpup(p++);
268 if (tv->tv_nsec >= (u32)1000000000)
269 return nfserr_inval;
270
271 DECODE_TAIL;
272}
273
b37ad28b 274static __be32
1da177e4
LT		 275nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
276{
277 u32 bmlen;
278 DECODE_HEAD;
279
280 bmval[0] = 0;
281 bmval[1] = 0;
7e705706 282 bmval[2] = 0;
1da177e4
LT		 283
284 READ_BUF(4);
06553991 285 bmlen = be32_to_cpup(p++);
1da177e4
LT		 286 if (bmlen > 1000)
287 goto xdr_error;
288
289 READ_BUF(bmlen << 2);
290 if (bmlen > 0)
06553991 291 bmval[0] = be32_to_cpup(p++);
1da177e4 292 if (bmlen > 1)
06553991 293 bmval[1] = be32_to_cpup(p++);
7e705706 294 if (bmlen > 2)
06553991 295 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 296
297 DECODE_TAIL;
298}
299
b37ad28b 300static __be32
3c8e0316 301nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 302 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 303 struct xdr_netobj *label, int *umask)
1da177e4
LT		 304{
305 int expected_len, len = 0;
306 u32 dummy32;
307 char *buf;
308
309 DECODE_HEAD;
310 iattr->ia_valid = 0;
311 if ((status = nfsd4_decode_bitmap(argp, bmval)))
312 return status;
313
e864c189
BF		 314 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
315 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
316 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
317 if (nfsd_attrs_supported(argp->minorversion, bmval))
318 return nfserr_inval;
319 return nfserr_attrnotsupp;
320 }
321
1da177e4 322 READ_BUF(4);
06553991 323 expected_len = be32_to_cpup(p++);
1da177e4
LT		 324
325 if (bmval[0] & FATTR4_WORD0_SIZE) {
326 READ_BUF(8);
327 len += 8;
542d1ab3 328 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 329 iattr->ia_valid |= ATTR_SIZE;
330 }
331 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 332 u32 nace;
28e05dd8 333 struct nfs4_ace *ace;
1da177e4
LT		 334
335 READ_BUF(4); len += 4;
06553991 336 nace = be32_to_cpup(p++);
1da177e4 337
28e05dd8 338 if (nace > NFS4_ACL_MAX)
798df338 339 return nfserr_fbig;
28e05dd8 340
d5e23383 341 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 342 if (*acl == NULL)
343 return nfserr_jukebox;
344
28e05dd8
BF		 345 (*acl)->naces = nace;
346 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 347 READ_BUF(16); len += 16;
06553991
BF		 348 ace->type = be32_to_cpup(p++);
349 ace->flag = be32_to_cpup(p++);
350 ace->access_mask = be32_to_cpup(p++);
351 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 352 READ_BUF(dummy32);
353 len += XDR_QUADLEN(dummy32) << 2;
354 READMEM(buf, dummy32);
28e05dd8 355 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 356 status = nfs_ok;
28e05dd8 357 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 358 ;
28e05dd8 359 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 360 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 361 buf, dummy32, &ace->who_gid);
1da177e4 362 else
3c726023 363 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 364 buf, dummy32, &ace->who_uid);
3c726023
BF		 365 if (status)
366 return status;
1da177e4
LT		 367 }
368 } else
369 *acl = NULL;
370 if (bmval[1] & FATTR4_WORD1_MODE) {
371 READ_BUF(4);
372 len += 4;
06553991 373 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 374 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
375 iattr->ia_valid |= ATTR_MODE;
376 }
377 if (bmval[1] & FATTR4_WORD1_OWNER) {
378 READ_BUF(4);
379 len += 4;
06553991 380 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 381 READ_BUF(dummy32);
382 len += (XDR_QUADLEN(dummy32) << 2);
383 READMEM(buf, dummy32);
47c85291
N		 384 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
385 return status;
1da177e4
LT		 386 iattr->ia_valid |= ATTR_UID;
387 }
388 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
389 READ_BUF(4);
390 len += 4;
06553991 391 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 392 READ_BUF(dummy32);
393 len += (XDR_QUADLEN(dummy32) << 2);
394 READMEM(buf, dummy32);
47c85291
N		 395 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
396 return status;
1da177e4
LT		 397 iattr->ia_valid |= ATTR_GID;
398 }
399 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
400 READ_BUF(4);
401 len += 4;
06553991 402 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 403 switch (dummy32) {
404 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 405 len += 12;
4c94e13e
CH		 406 status = nfsd4_decode_time(argp, &iattr->ia_atime);
407 if (status)
408 return status;
1da177e4
LT		 409 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
410 break;
411 case NFS4_SET_TO_SERVER_TIME:
412 iattr->ia_valid |= ATTR_ATIME;
413 break;
414 default:
415 goto xdr_error;
416 }
417 }
1da177e4
LT		 418 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
419 READ_BUF(4);
420 len += 4;
06553991 421 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 422 switch (dummy32) {
423 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 424 len += 12;
4c94e13e
CH		 425 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
426 if (status)
427 return status;
1da177e4
LT		 428 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
429 break;
430 case NFS4_SET_TO_SERVER_TIME:
431 iattr->ia_valid |= ATTR_MTIME;
432 break;
433 default:
434 goto xdr_error;
435 }
436 }
18032ca0
DQ		 437
438 label->len = 0;
439#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
440 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
441 READ_BUF(4);
442 len += 4;
06553991 443 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 444 READ_BUF(4);
445 len += 4;
06553991 446 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 447 READ_BUF(4);
448 len += 4;
06553991 449 dummy32 = be32_to_cpup(p++);
18032ca0 450 READ_BUF(dummy32);
1ec8c0c4 451 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 452 return nfserr_badlabel;
453 len += (XDR_QUADLEN(dummy32) << 2);
454 READMEM(buf, dummy32);
29c353b3
BF		 455 label->len = dummy32;
456 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 457 if (!label->data)
458 return nfserr_jukebox;
18032ca0
DQ		 459 }
460#endif
47057abd
AG		 461 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
462 if (!umask)
463 goto xdr_error;
464 READ_BUF(8);
465 len += 8;
466 dummy32 = be32_to_cpup(p++);
467 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
468 dummy32 = be32_to_cpup(p++);
469 *umask = dummy32 & S_IRWXUGO;
470 iattr->ia_valid |= ATTR_MODE;
471 }
e864c189 472 if (len != expected_len)
1da177e4
LT		 473 goto xdr_error;
474
475 DECODE_TAIL;
1da177e4
LT		 476}
477
e31a1b66
BH		 478static __be32
479nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
480{
481 DECODE_HEAD;
482
483 READ_BUF(sizeof(stateid_t));
06553991 484 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 485 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
486
487 DECODE_TAIL;
488}
489
b37ad28b 490static __be32
1da177e4
LT		 491nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
492{
493 DECODE_HEAD;
494
495 READ_BUF(4);
06553991 496 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 497
498 DECODE_TAIL;
499}
500
acb2887e
BF		 501static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
502{
503 DECODE_HEAD;
12fc3e92 504 u32 dummy, uid, gid;
acb2887e
BF		 505 char *machine_name;
506 int i;
507 int nr_secflavs;
508
509 /* callback_sec_params4 */
510 READ_BUF(4);
06553991 511 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 512 if (nr_secflavs)
513 cbs->flavor = (u32)(-1);
514 else
515 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
516 cbs->flavor = 0;
acb2887e
BF		 517 for (i = 0; i < nr_secflavs; ++i) {
518 READ_BUF(4);
06553991 519 dummy = be32_to_cpup(p++);
acb2887e
BF		 520 switch (dummy) {
521 case RPC_AUTH_NULL:
522 /* Nothing to read */
12fc3e92
BF		 523 if (cbs->flavor == (u32)(-1))
524 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 525 break;
526 case RPC_AUTH_UNIX:
527 READ_BUF(8);
528 /* stamp */
06553991 529 dummy = be32_to_cpup(p++);
acb2887e
BF		 530
531 /* machine name */
06553991 532 dummy = be32_to_cpup(p++);
acb2887e
BF		 533 READ_BUF(dummy);
534 SAVEMEM(machine_name, dummy);
535
536 /* uid, gid */
537 READ_BUF(8);
06553991
BF		 538 uid = be32_to_cpup(p++);
539 gid = be32_to_cpup(p++);
acb2887e
BF		 540
541 /* more gids */
542 READ_BUF(4);
06553991 543 dummy = be32_to_cpup(p++);
acb2887e 544 READ_BUF(dummy * 4);
12fc3e92 545 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 546 kuid_t kuid = make_kuid(&init_user_ns, uid);
547 kgid_t kgid = make_kgid(&init_user_ns, gid);
548 if (uid_valid(kuid) && gid_valid(kgid)) {
549 cbs->uid = kuid;
550 cbs->gid = kgid;
551 cbs->flavor = RPC_AUTH_UNIX;
552 } else {
553 dprintk("RPC_AUTH_UNIX with invalid"
554 "uid or gid ignoring!\n");
555 }
12fc3e92 556 }
acb2887e
BF		 557 break;
558 case RPC_AUTH_GSS:
559 dprintk("RPC_AUTH_GSS callback secflavor "
560 "not supported!\n");
561 READ_BUF(8);
562 /* gcbp_service */
06553991 563 dummy = be32_to_cpup(p++);
acb2887e 564 /* gcbp_handle_from_server */
06553991 565 dummy = be32_to_cpup(p++);
acb2887e
BF		 566 READ_BUF(dummy);
567 p += XDR_QUADLEN(dummy);
568 /* gcbp_handle_from_client */
569 READ_BUF(4);
06553991 570 dummy = be32_to_cpup(p++);
acb2887e
BF		 571 READ_BUF(dummy);
572 break;
573 default:
574 dprintk("Illegal callback secflavor\n");
575 return nfserr_inval;
576 }
577 }
578 DECODE_TAIL;
579}
580
cb73a9f4
BF		 581static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
582{
583 DECODE_HEAD;
584
585 READ_BUF(4);
06553991 586 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 587 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
588
589 DECODE_TAIL;
590}
591
1d1bc8f2
BF		 592static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
593{
594 DECODE_HEAD;
1d1bc8f2
BF		 595
596 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
597 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 598 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 599 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
600 * could help us figure out we should be using it. */
1d1bc8f2
BF		 601 DECODE_TAIL;
602}
603
b37ad28b 604static __be32
1da177e4
LT		 605nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
606{
607 DECODE_HEAD;
608
e31a1b66 609 READ_BUF(4);
06553991 610 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 611 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 612
613 DECODE_TAIL;
614}
615
616
b37ad28b 617static __be32
1da177e4
LT		 618nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
619{
620 DECODE_HEAD;
621
622 READ_BUF(12);
542d1ab3 623 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 624 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 625
626 DECODE_TAIL;
627}
628
b37ad28b 629static __be32
1da177e4
LT		 630nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
631{
632 DECODE_HEAD;
633
634 READ_BUF(4);
06553991 635 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 636 switch (create->cr_type) {
637 case NF4LNK:
638 READ_BUF(4);
7fb84306
BF		 639 create->cr_datalen = be32_to_cpup(p++);
640 READ_BUF(create->cr_datalen);
29c353b3 641 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 642 if (!create->cr_data)
76f47128 643 return nfserr_jukebox;
1da177e4
LT		 644 break;
645 case NF4BLK:
646 case NF4CHR:
647 READ_BUF(8);
06553991
BF		 648 create->cr_specdata1 = be32_to_cpup(p++);
649 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 650 break;
651 case NF4SOCK:
652 case NF4FIFO:
653 case NF4DIR:
654 default:
655 break;
656 }
657
658 READ_BUF(4);
06553991 659 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 660 READ_BUF(create->cr_namelen);
661 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 662 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 663 return status;
664
3c8e0316 665 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd
AG		 666 &create->cr_acl, &create->cr_label,
667 &current->fs->umask);
c0d6fc8a 668 if (status)
1da177e4
LT		 669 goto out;
670
671 DECODE_TAIL;
672}
673
b37ad28b 674static inline __be32
1da177e4
LT		 675nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
676{
e31a1b66 677 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 678}
679
b37ad28b 680static inline __be32
1da177e4
LT		 681nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
682{
683 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
684}
685
b37ad28b 686static __be32
1da177e4
LT		 687nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
688{
689 DECODE_HEAD;
690
691 READ_BUF(4);
06553991 692 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 693 READ_BUF(link->li_namelen);
694 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 695 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 696 return status;
697
698 DECODE_TAIL;
699}
700
b37ad28b 701static __be32
1da177e4
LT		 702nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
703{
704 DECODE_HEAD;
705
1da177e4
LT		 706 /*
707 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
708 */
709 READ_BUF(28);
06553991 710 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 711 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
712 goto xdr_error;
06553991 713 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 714 p = xdr_decode_hyper(p, &lock->lk_offset);
715 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 716 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 717
718 if (lock->lk_is_new) {
e31a1b66 719 READ_BUF(4);
06553991 720 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 721 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
722 if (status)
723 return status;
724 READ_BUF(8 + sizeof(clientid_t));
06553991 725 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 726 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 727 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 728 READ_BUF(lock->lk_new_owner.len);
729 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
730 } else {
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
732 if (status)
733 return status;
734 READ_BUF(4);
06553991 735 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 736 }
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
743{
744 DECODE_HEAD;
745
746 READ_BUF(32);
06553991 747 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 748 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
749 goto xdr_error;
542d1ab3
BF		 750 p = xdr_decode_hyper(p, &lockt->lt_offset);
751 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 752 COPYMEM(&lockt->lt_clientid, 8);
06553991 753 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 754 READ_BUF(lockt->lt_owner.len);
755 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
756
757 DECODE_TAIL;
758}
759
b37ad28b 760static __be32
1da177e4
LT		 761nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
762{
763 DECODE_HEAD;
764
e31a1b66 765 READ_BUF(8);
06553991 766 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 767 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
768 goto xdr_error;
06553991 769 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 770 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
771 if (status)
772 return status;
773 READ_BUF(16);
542d1ab3
BF		 774 p = xdr_decode_hyper(p, &locku->lu_offset);
775 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 776
777 DECODE_TAIL;
778}
779
b37ad28b 780static __be32
1da177e4
LT		 781nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
782{
783 DECODE_HEAD;
784
785 READ_BUF(4);
06553991 786 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 787 READ_BUF(lookup->lo_len);
788 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 789 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 790 return status;
791
792 DECODE_TAIL;
793}
794
2c8bd7e0 795static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 796{
797 __be32 *p;
798 u32 w;
799
800 READ_BUF(4);
06553991 801 w = be32_to_cpup(p++);
2c8bd7e0
BH		 802 *share_access = w & NFS4_SHARE_ACCESS_MASK;
803 *deleg_want = w & NFS4_SHARE_WANT_MASK;
804 if (deleg_when)
805 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
806
04f9e664
BF		 807 switch (w & NFS4_SHARE_ACCESS_MASK) {
808 case NFS4_SHARE_ACCESS_READ:
809 case NFS4_SHARE_ACCESS_WRITE:
810 case NFS4_SHARE_ACCESS_BOTH:
811 break;
812 default:
813 return nfserr_bad_xdr;
814 }
fc0d14fe 815 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 816 if (!w)
817 return nfs_ok;
818 if (!argp->minorversion)
819 return nfserr_bad_xdr;
820 switch (w & NFS4_SHARE_WANT_MASK) {
821 case NFS4_SHARE_WANT_NO_PREFERENCE:
822 case NFS4_SHARE_WANT_READ_DELEG:
823 case NFS4_SHARE_WANT_WRITE_DELEG:
824 case NFS4_SHARE_WANT_ANY_DELEG:
825 case NFS4_SHARE_WANT_NO_DELEG:
826 case NFS4_SHARE_WANT_CANCEL:
827 break;
828 default:
829 return nfserr_bad_xdr;
830 }
92bac8c5 831 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 832 if (!w)
833 return nfs_ok;
2c8bd7e0
BH		 834
835 if (!deleg_when) /* open_downgrade */
836 return nfserr_inval;
04f9e664
BF		 837 switch (w) {
838 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
839 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 840 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
841 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 842 return nfs_ok;
843 }
844xdr_error:
845 return nfserr_bad_xdr;
846}
847
848static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
849{
850 __be32 *p;
851
852 READ_BUF(4);
06553991 853 *x = be32_to_cpup(p++);
04f9e664 854 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 855 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 856 return nfserr_bad_xdr;
857 return nfs_ok;
858xdr_error:
859 return nfserr_bad_xdr;
860}
861
a084daf5
BF		 862static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
863{
864 __be32 *p;
865
866 READ_BUF(4);
06553991 867 o->len = be32_to_cpup(p++);
a084daf5
BF		 868
869 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
870 return nfserr_bad_xdr;
871
872 READ_BUF(o->len);
873 SAVEMEM(o->data, o->len);
874 return nfs_ok;
875xdr_error:
876 return nfserr_bad_xdr;
877}
878
b37ad28b 879static __be32
1da177e4
LT		 880nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
881{
882 DECODE_HEAD;
2c8bd7e0 883 u32 dummy;
1da177e4
LT		 884
885 memset(open->op_bmval, 0, sizeof(open->op_bmval));
886 open->op_iattr.ia_valid = 0;
fe0750e5 887 open->op_openowner = NULL;
1da177e4 888
9d313b17 889 open->op_xdr_error = 0;
1da177e4 890 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 891 READ_BUF(4);
06553991 892 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 893 /* decode, yet ignore deleg_when until supported */
894 status = nfsd4_decode_share_access(argp, &open->op_share_access,
895 &open->op_deleg_want, &dummy);
04f9e664
BF		 896 if (status)
897 goto xdr_error;
898 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
899 if (status)
900 goto xdr_error;
a084daf5 901 READ_BUF(sizeof(clientid_t));
1da177e4 902 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 903 status = nfsd4_decode_opaque(argp, &open->op_owner);
904 if (status)
905 goto xdr_error;
906 READ_BUF(4);
06553991 907 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 908 switch (open->op_create) {
909 case NFS4_OPEN_NOCREATE:
910 break;
911 case NFS4_OPEN_CREATE:
47057abd 912 current->fs->umask = 0;
1da177e4 913 READ_BUF(4);
06553991 914 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 915 switch (open->op_createmode) {
916 case NFS4_CREATE_UNCHECKED:
917 case NFS4_CREATE_GUARDED:
c0d6fc8a 918 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd
AG		 919 &open->op_iattr, &open->op_acl, &open->op_label,
920 &current->fs->umask);
c0d6fc8a 921 if (status)
1da177e4
LT		 922 goto out;
923 break;
924 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 925 READ_BUF(NFS4_VERIFIER_SIZE);
926 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 927 break;
79fb54ab
BH		 928 case NFS4_CREATE_EXCLUSIVE4_1:
929 if (argp->minorversion < 1)
930 goto xdr_error;
ab4684d1
CL		 931 READ_BUF(NFS4_VERIFIER_SIZE);
932 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 933 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd
AG		 934 &open->op_iattr, &open->op_acl, &open->op_label,
935 &current->fs->umask);
79fb54ab
BH		 936 if (status)
937 goto out;
938 break;
1da177e4
LT		 939 default:
940 goto xdr_error;
941 }
942 break;
943 default:
944 goto xdr_error;
945 }
946
947 /* open_claim */
948 READ_BUF(4);
06553991 949 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 950 switch (open->op_claim_type) {
951 case NFS4_OPEN_CLAIM_NULL:
952 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
953 READ_BUF(4);
06553991 954 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 955 READ_BUF(open->op_fname.len);
956 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 957 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 958 return status;
959 break;
960 case NFS4_OPEN_CLAIM_PREVIOUS:
961 READ_BUF(4);
06553991 962 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 963 break;
964 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 965 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
966 if (status)
967 return status;
968 READ_BUF(4);
06553991 969 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 970 READ_BUF(open->op_fname.len);
971 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 972 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 973 return status;
974 break;
8b289b2c
BF		 975 case NFS4_OPEN_CLAIM_FH:
976 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
977 if (argp->minorversion < 1)
978 goto xdr_error;
979 /* void */
980 break;
981 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
982 if (argp->minorversion < 1)
983 goto xdr_error;
984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
985 if (status)
986 return status;
987 break;
1da177e4
LT		 988 default:
989 goto xdr_error;
990 }
991
992 DECODE_TAIL;
993}
994
b37ad28b 995static __be32
1da177e4
LT		 996nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
997{
998 DECODE_HEAD;
e1a90ebd
AS		 999
1000 if (argp->minorversion >= 1)
1001 return nfserr_notsupp;
1002
e31a1b66
BH		 1003 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1004 if (status)
1005 return status;
1006 READ_BUF(4);
06553991 1007 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1008
1da177e4
LT		 1009 DECODE_TAIL;
1010}
1011
b37ad28b 1012static __be32
1da177e4
LT		 1013nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1014{
1015 DECODE_HEAD;
1016
e31a1b66
BH		 1017 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1018 if (status)
1019 return status;
04f9e664 1020 READ_BUF(4);
06553991 1021 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1022 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1023 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1024 if (status)
1025 return status;
1026 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1027 if (status)
1028 return status;
1da177e4
LT		 1029 DECODE_TAIL;
1030}
1031
b37ad28b 1032static __be32
1da177e4
LT		 1033nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1034{
1035 DECODE_HEAD;
1036
1037 READ_BUF(4);
06553991 1038 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1039 if (putfh->pf_fhlen > NFS4_FHSIZE)
1040 goto xdr_error;
1041 READ_BUF(putfh->pf_fhlen);
1042 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1043
1044 DECODE_TAIL;
1045}
1046
e1a90ebd
AS		 1047static __be32
1048nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1049{
1050 if (argp->minorversion == 0)
1051 return nfs_ok;
1052 return nfserr_notsupp;
1053}
1054
b37ad28b 1055static __be32
1da177e4
LT		 1056nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1057{
1058 DECODE_HEAD;
1059
e31a1b66
BH		 1060 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1061 if (status)
1062 return status;
1063 READ_BUF(12);
542d1ab3 1064 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1065 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1066
1067 DECODE_TAIL;
1068}
1069
b37ad28b 1070static __be32
1da177e4
LT		 1071nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1072{
1073 DECODE_HEAD;
1074
1075 READ_BUF(24);
542d1ab3 1076 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1077 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1078 readdir->rd_dircount = be32_to_cpup(p++);
1079 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1080 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1081 goto out;
1082
1083 DECODE_TAIL;
1084}
1085
b37ad28b 1086static __be32
1da177e4
LT		 1087nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1088{
1089 DECODE_HEAD;
1090
1091 READ_BUF(4);
06553991 1092 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1093 READ_BUF(remove->rm_namelen);
1094 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1095 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1096 return status;
1097
1098 DECODE_TAIL;
1099}
1100
b37ad28b 1101static __be32
1da177e4
LT		 1102nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1103{
1104 DECODE_HEAD;
1105
1106 READ_BUF(4);
06553991 1107 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1108 READ_BUF(rename->rn_snamelen);
1da177e4 1109 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1110 READ_BUF(4);
06553991 1111 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1112 READ_BUF(rename->rn_tnamelen);
1113 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1114 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1115 return status;
a36b1725 1116 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1117 return status;
1118
1119 DECODE_TAIL;
1120}
1121
b37ad28b 1122static __be32
1da177e4
LT		 1123nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1124{
1125 DECODE_HEAD;
1126
e1a90ebd
AS		 1127 if (argp->minorversion >= 1)
1128 return nfserr_notsupp;
1129
1da177e4
LT		 1130 READ_BUF(sizeof(clientid_t));
1131 COPYMEM(clientid, sizeof(clientid_t));
1132
1133 DECODE_TAIL;
1134}
1135
dcb488a3
AA		 1136static __be32
1137nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1138 struct nfsd4_secinfo *secinfo)
1139{
1140 DECODE_HEAD;
1141
1142 READ_BUF(4);
06553991 1143 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1144 READ_BUF(secinfo->si_namelen);
1145 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1146 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1147 if (status)
1148 return status;
1149 DECODE_TAIL;
1150}
1151
04f4ad16
BF		 1152static __be32
1153nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1154 struct nfsd4_secinfo_no_name *sin)
1155{
1156 DECODE_HEAD;
1157
1158 READ_BUF(4);
06553991 1159 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1160 DECODE_TAIL;
1161}
1162
b37ad28b 1163static __be32
1da177e4
LT		 1164nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1165{
e31a1b66 1166 __be32 status;
1da177e4 1167
e31a1b66
BH		 1168 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1169 if (status)
1170 return status;
3c8e0316 1171 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1172 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1173}
1174
b37ad28b 1175static __be32
1da177e4
LT		 1176nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1177{
1178 DECODE_HEAD;
1179
e1a90ebd
AS		 1180 if (argp->minorversion >= 1)
1181 return nfserr_notsupp;
1182
ab4684d1
CL		 1183 READ_BUF(NFS4_VERIFIER_SIZE);
1184 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1185
a084daf5
BF		 1186 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1187 if (status)
1188 return nfserr_bad_xdr;
1189 READ_BUF(8);
06553991
BF		 1190 setclientid->se_callback_prog = be32_to_cpup(p++);
1191 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1192 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1193 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1194 READ_BUF(4);
06553991 1195 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1196
4aed9c46 1197 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1198 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1199 READ_BUF(4);
06553991 1200 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1201
1202 DECODE_TAIL;
1203}
1204
b37ad28b 1205static __be32
1da177e4
LT		 1206nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1207{
1208 DECODE_HEAD;
1209
e1a90ebd
AS		 1210 if (argp->minorversion >= 1)
1211 return nfserr_notsupp;
1212
ab4684d1 1213 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1214 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1215 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1216
1217 DECODE_TAIL;
1218}
1219
1220/* Also used for NVERIFY */
b37ad28b 1221static __be32
1da177e4
LT		 1222nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1223{
1da177e4
LT		 1224 DECODE_HEAD;
1225
1226 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1227 goto out;
1228
1229 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1230 * nfsd4_proc_verify */
1231
1da177e4 1232 READ_BUF(4);
06553991 1233 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1234 READ_BUF(verify->ve_attrlen);
1235 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1236
1237 DECODE_TAIL;
1238}
1239
b37ad28b 1240static __be32
1da177e4
LT		 1241nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1242{
1243 int avail;
1da177e4
LT		 1244 int len;
1245 DECODE_HEAD;
1246
e31a1b66
BH		 1247 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1248 if (status)
1249 return status;
1250 READ_BUF(16);
542d1ab3 1251 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1252 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1253 if (write->wr_stable_how > 2)
1254 goto xdr_error;
06553991 1255 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1256
1257 /* Sorry .. no magic macros for this.. *
1258 * READ_BUF(write->wr_buflen);
1259 * SAVEMEM(write->wr_buf, write->wr_buflen);
1260 */
1261 avail = (char*)argp->end - (char*)argp->p;
1262 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1263 dprintk("NFSD: xdr error (%s:%d)\n",
1264 __FILE__, __LINE__);
1da177e4
LT		 1265 goto xdr_error;
1266 }
70cc7f75
BF		 1267 write->wr_head.iov_base = p;
1268 write->wr_head.iov_len = avail;
70cc7f75 1269 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1270
1271 len = XDR_QUADLEN(write->wr_buflen) << 2;
1272 if (len >= avail) {
1273 int pages;
1274
1275 len -= avail;
1276
1277 pages = len >> PAGE_SHIFT;
1278 argp->pagelist += pages;
1279 argp->pagelen -= pages * PAGE_SIZE;
1280 len -= pages * PAGE_SIZE;
1281
1282 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1283 argp->pagelist++;
5a80a54d 1284 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1285 }
5a80a54d 1286 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1287
1288 DECODE_TAIL;
1289}
1290
b37ad28b 1291static __be32
1da177e4
LT		 1292nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1293{
1294 DECODE_HEAD;
1295
e1a90ebd
AS		 1296 if (argp->minorversion >= 1)
1297 return nfserr_notsupp;
1298
1da177e4
LT		 1299 READ_BUF(12);
1300 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1301 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1302 READ_BUF(rlockowner->rl_owner.len);
1303 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1304
60adfc50
AA		 1305 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1306 return nfserr_inval;
1da177e4
LT		 1307 DECODE_TAIL;
1308}
1309
2db134eb
AA		 1310static __be32
1311nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1312 struct nfsd4_exchange_id *exid)
2db134eb 1313{
5afa040b 1314 int dummy, tmp;
0733d213
AA		 1315 DECODE_HEAD;
1316
1317 READ_BUF(NFS4_VERIFIER_SIZE);
1318 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1319
a084daf5
BF		 1320 status = nfsd4_decode_opaque(argp, &exid->clname);
1321 if (status)
1322 return nfserr_bad_xdr;
0733d213
AA		 1323
1324 READ_BUF(4);
06553991 1325 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1326
1327 /* Ignore state_protect4_a */
1328 READ_BUF(4);
06553991 1329 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1330 switch (exid->spa_how) {
1331 case SP4_NONE:
1332 break;
1333 case SP4_MACH_CRED:
1334 /* spo_must_enforce */
ed941643
AE		 1335 status = nfsd4_decode_bitmap(argp,
1336 exid->spo_must_enforce);
1337 if (status)
1338 goto out;
0733d213 1339 /* spo_must_allow */
ed941643
AE		 1340 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1341 if (status)
1342 goto out;
0733d213
AA		 1343 break;
1344 case SP4_SSV:
1345 /* ssp_ops */
1346 READ_BUF(4);
06553991 1347 dummy = be32_to_cpup(p++);
0733d213
AA		 1348 READ_BUF(dummy * 4);
1349 p += dummy;
1350
1351 READ_BUF(4);
06553991 1352 dummy = be32_to_cpup(p++);
0733d213
AA		 1353 READ_BUF(dummy * 4);
1354 p += dummy;
1355
1356 /* ssp_hash_algs<> */
1357 READ_BUF(4);
06553991 1358 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1359 while (tmp--) {
1360 READ_BUF(4);
06553991 1361 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1362 READ_BUF(dummy);
1363 p += XDR_QUADLEN(dummy);
1364 }
0733d213
AA		 1365
1366 /* ssp_encr_algs<> */
1367 READ_BUF(4);
06553991 1368 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1369 while (tmp--) {
1370 READ_BUF(4);
06553991 1371 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1372 READ_BUF(dummy);
1373 p += XDR_QUADLEN(dummy);
1374 }
0733d213
AA		 1375
1376 /* ssp_window and ssp_num_gss_handles */
1377 READ_BUF(8);
06553991
BF		 1378 dummy = be32_to_cpup(p++);
1379 dummy = be32_to_cpup(p++);
0733d213
AA		 1380 break;
1381 default:
1382 goto xdr_error;
1383 }
1384
1385 /* Ignore Implementation ID */
1386 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1387 dummy = be32_to_cpup(p++);
0733d213
AA		 1388
1389 if (dummy > 1)
1390 goto xdr_error;
1391
1392 if (dummy == 1) {
1393 /* nii_domain */
1394 READ_BUF(4);
06553991 1395 dummy = be32_to_cpup(p++);
0733d213
AA		 1396 READ_BUF(dummy);
1397 p += XDR_QUADLEN(dummy);
1398
1399 /* nii_name */
1400 READ_BUF(4);
06553991 1401 dummy = be32_to_cpup(p++);
0733d213
AA		 1402 READ_BUF(dummy);
1403 p += XDR_QUADLEN(dummy);
1404
1405 /* nii_date */
1406 READ_BUF(12);
1407 p += 3;
1408 }
1409 DECODE_TAIL;
2db134eb
AA		 1410}
1411
1412static __be32
1413nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1414 struct nfsd4_create_session *sess)
1415{
ec6b5d7b 1416 DECODE_HEAD;
ec6b5d7b 1417 u32 dummy;
ec6b5d7b
AA		 1418
1419 READ_BUF(16);
1420 COPYMEM(&sess->clientid, 8);
06553991
BF		 1421 sess->seqid = be32_to_cpup(p++);
1422 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1423
1424 /* Fore channel attrs */
1425 READ_BUF(28);
06553991
BF		 1426 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1427 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1428 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1429 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1430 sess->fore_channel.maxops = be32_to_cpup(p++);
1431 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1432 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1433 if (sess->fore_channel.nr_rdma_attrs == 1) {
1434 READ_BUF(4);
06553991 1435 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1436 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1437 dprintk("Too many fore channel attr bitmaps!\n");
1438 goto xdr_error;
1439 }
1440
1441 /* Back channel attrs */
1442 READ_BUF(28);
06553991
BF		 1443 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1444 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1445 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1446 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1447 sess->back_channel.maxops = be32_to_cpup(p++);
1448 sess->back_channel.maxreqs = be32_to_cpup(p++);
1449 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1450 if (sess->back_channel.nr_rdma_attrs == 1) {
1451 READ_BUF(4);
06553991 1452 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1453 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1454 dprintk("Too many back channel attr bitmaps!\n");
1455 goto xdr_error;
1456 }
1457
acb2887e 1458 READ_BUF(4);
06553991 1459 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1460 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1461 DECODE_TAIL;
2db134eb
AA		 1462}
1463
1464static __be32
1465nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1466 struct nfsd4_destroy_session *destroy_session)
1467{
e10e0cfc
BH		 1468 DECODE_HEAD;
1469 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1470 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1471
1472 DECODE_TAIL;
2db134eb
AA		 1473}
1474
e1ca12df
BS		 1475static __be32
1476nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1477 struct nfsd4_free_stateid *free_stateid)
1478{
1479 DECODE_HEAD;
1480
1481 READ_BUF(sizeof(stateid_t));
06553991 1482 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1483 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1484
1485 DECODE_TAIL;
1486}
1487
2db134eb
AA		 1488static __be32
1489nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1490 struct nfsd4_sequence *seq)
1491{
b85d4c01
BH		 1492 DECODE_HEAD;
1493
1494 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1495 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1496 seq->seqid = be32_to_cpup(p++);
1497 seq->slotid = be32_to_cpup(p++);
1498 seq->maxslots = be32_to_cpup(p++);
1499 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1500
1501 DECODE_TAIL;
2db134eb
AA		 1502}
1503
17456804
BS		 1504static __be32
1505nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1506{
17456804 1507 int i;
03cfb420
BS		 1508 __be32 *p, status;
1509 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1510
1511 READ_BUF(4);
1512 test_stateid->ts_num_ids = ntohl(*p++);
1513
03cfb420 1514 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1515
1516 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1517 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1518 if (!stateid) {
afcf6792 1519 status = nfserrno(-ENOMEM);
03cfb420
BS		 1520 goto out;
1521 }
1522
03cfb420
BS		 1523 INIT_LIST_HEAD(&stateid->ts_id_list);
1524 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1525
1526 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1527 if (status)
03cfb420 1528 goto out;
17456804
BS		 1529 }
1530
1531 status = 0;
1532out:
1533 return status;
1534xdr_error:
1535 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1536 status = nfserr_bad_xdr;
1537 goto out;
1538}
1539
345c2842
MJ		 1540static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1541{
1542 DECODE_HEAD;
1543
1544 READ_BUF(8);
1545 COPYMEM(&dc->clientid, 8);
1546
1547 DECODE_TAIL;
1548}
1549
4dc6ec00
BF		 1550static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1551{
1552 DECODE_HEAD;
1553
1554 READ_BUF(4);
06553991 1555 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1556
1557 DECODE_TAIL;
1558}
1559
9cf514cc
CH		 1560#ifdef CONFIG_NFSD_PNFS
1561static __be32
1562nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1563 struct nfsd4_getdeviceinfo *gdev)
1564{
1565 DECODE_HEAD;
1566 u32 num, i;
1567
1568 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1569 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1570 gdev->gd_layout_type = be32_to_cpup(p++);
1571 gdev->gd_maxcount = be32_to_cpup(p++);
1572 num = be32_to_cpup(p++);
1573 if (num) {
1574 READ_BUF(4 * num);
1575 gdev->gd_notify_types = be32_to_cpup(p++);
1576 for (i = 1; i < num; i++) {
1577 if (be32_to_cpup(p++)) {
1578 status = nfserr_inval;
1579 goto out;
1580 }
1581 }
1582 }
1583 DECODE_TAIL;
1584}
1585
1586static __be32
1587nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1588 struct nfsd4_layoutget *lgp)
1589{
1590 DECODE_HEAD;
1591
1592 READ_BUF(36);
1593 lgp->lg_signal = be32_to_cpup(p++);
1594 lgp->lg_layout_type = be32_to_cpup(p++);
1595 lgp->lg_seg.iomode = be32_to_cpup(p++);
1596 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1597 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1598 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1599
1600 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1601 if (status)
1602 return status;
1603
9cf514cc
CH		 1604 READ_BUF(4);
1605 lgp->lg_maxcount = be32_to_cpup(p++);
1606
1607 DECODE_TAIL;
1608}
1609
1610static __be32
1611nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1612 struct nfsd4_layoutcommit *lcp)
1613{
1614 DECODE_HEAD;
1615 u32 timechange;
1616
1617 READ_BUF(20);
1618 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1619 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1620 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1621
1622 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1623 if (status)
1624 return status;
1625
9cf514cc
CH		 1626 READ_BUF(4);
1627 lcp->lc_newoffset = be32_to_cpup(p++);
1628 if (lcp->lc_newoffset) {
1629 READ_BUF(8);
1630 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1631 } else
1632 lcp->lc_last_wr = 0;
1633 READ_BUF(4);
1634 timechange = be32_to_cpup(p++);
1635 if (timechange) {
1636 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1637 if (status)
1638 return status;
1639 } else {
1640 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1641 }
1642 READ_BUF(8);
1643 lcp->lc_layout_type = be32_to_cpup(p++);
1644
1645 /*
1646 * Save the layout update in XDR format and let the layout driver deal
1647 * with it later.
1648 */
1649 lcp->lc_up_len = be32_to_cpup(p++);
1650 if (lcp->lc_up_len > 0) {
1651 READ_BUF(lcp->lc_up_len);
1652 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1653 }
1654
1655 DECODE_TAIL;
1656}
1657
1658static __be32
1659nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1660 struct nfsd4_layoutreturn *lrp)
1661{
1662 DECODE_HEAD;
1663
1664 READ_BUF(16);
1665 lrp->lr_reclaim = be32_to_cpup(p++);
1666 lrp->lr_layout_type = be32_to_cpup(p++);
1667 lrp->lr_seg.iomode = be32_to_cpup(p++);
1668 lrp->lr_return_type = be32_to_cpup(p++);
1669 if (lrp->lr_return_type == RETURN_FILE) {
1670 READ_BUF(16);
1671 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1672 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1673
1674 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1675 if (status)
1676 return status;
1677
9cf514cc
CH		 1678 READ_BUF(4);
1679 lrp->lrf_body_len = be32_to_cpup(p++);
1680 if (lrp->lrf_body_len > 0) {
1681 READ_BUF(lrp->lrf_body_len);
1682 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1683 }
1684 } else {
1685 lrp->lr_seg.offset = 0;
1686 lrp->lr_seg.length = NFS4_MAX_UINT64;
1687 }
1688
1689 DECODE_TAIL;
1690}
1691#endif /* CONFIG_NFSD_PNFS */
1692
95d871f0
AS		 1693static __be32
1694nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1695 struct nfsd4_fallocate *fallocate)
1696{
1697 DECODE_HEAD;
1698
1699 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1700 if (status)
1701 return status;
1702
1703 READ_BUF(16);
1704 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1705 xdr_decode_hyper(p, &fallocate->falloc_length);
1706
1707 DECODE_TAIL;
1708}
1709
ffa0160a
CH		 1710static __be32
1711nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1712{
1713 DECODE_HEAD;
1714
1715 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1716 if (status)
1717 return status;
1718 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1719 if (status)
1720 return status;
1721
1722 READ_BUF(8 + 8 + 8);
1723 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1724 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1725 p = xdr_decode_hyper(p, &clone->cl_count);
1726 DECODE_TAIL;
1727}
1728
29ae7f9d
AS		 1729static __be32
1730nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1731{
1732 DECODE_HEAD;
1733 unsigned int tmp;
1734
1735 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1736 if (status)
1737 return status;
1738 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1739 if (status)
1740 return status;
1741
1742 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1743 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1744 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1745 p = xdr_decode_hyper(p, &copy->cp_count);
1746 copy->cp_consecutive = be32_to_cpup(p++);
1747 copy->cp_synchronous = be32_to_cpup(p++);
1748 tmp = be32_to_cpup(p); /* Source server list not supported */
1749
1750 DECODE_TAIL;
1751}
1752
24bab491
AS		 1753static __be32
1754nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1755{
1756 DECODE_HEAD;
1757
1758 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1759 if (status)
1760 return status;
1761
1762 READ_BUF(8 + 4);
1763 p = xdr_decode_hyper(p, &seek->seek_offset);
1764 seek->seek_whence = be32_to_cpup(p);
1765
1766 DECODE_TAIL;
1767}
1768
347e0ad9
BH		 1769static __be32
1770nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1771{
1772 return nfs_ok;
1773}
1774
3c375c6f
BH		 1775static __be32
1776nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1777{
1e685ec2 1778 return nfserr_notsupp;
3c375c6f
BH		 1779}
1780
347e0ad9
BH		 1781typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1782
1783static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1784 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1785 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1786 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1787 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1788 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1789 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1790 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1791 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1792 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1793 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1794 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1795 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1796 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1797 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1798 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1799 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1800 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1801 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1802 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1803 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1804 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1805 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1806 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1807 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1808 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1809 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1810 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1811 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1812 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1813 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1814 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1815 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1816 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1817 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1818 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1819 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1820 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1821
1822 /* new operations for NFSv4.1 */
cb73a9f4 1823 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1824 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1825 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1826 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1827 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1828 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1829 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1830#ifdef CONFIG_NFSD_PNFS
1831 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1832 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1833 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1834 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1835 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1836#else
9064caae
RD		 1837 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1838 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1839 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1840 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1841 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1842#endif
04f4ad16 1843 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1844 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1845 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1846 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1847 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1848 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1849 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1850
1851 /* new operations for NFSv4.2 */
95d871f0 1852 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1853 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
87a15a80 1854 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1855 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1856 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1859 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1860 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1861 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1862 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1863 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1864 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1865};
1866
e1a90ebd
AS		 1867static inline bool
1868nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1869{
8217d146 1870 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1871 return false;
8217d146 1872 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1873 return false;
8217d146
AS		 1874 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1875 return false;
1876 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1877 return false;
1878 return true;
1879}
f2feb96b 1880
b37ad28b 1881static __be32
1da177e4
LT		 1882nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1883{
1884 DECODE_HEAD;
1885 struct nfsd4_op *op;
1091006c 1886 bool cachethis = false;
a5cddc88
BF		 1887 int auth_slack= argp->rqstp->rq_auth_slack;
1888 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1889 int readcount = 0;
1890 int readbytes = 0;
1da177e4
LT		 1891 int i;
1892
1da177e4 1893 READ_BUF(4);
06553991 1894 argp->taglen = be32_to_cpup(p++);
4aed9c46 1895 READ_BUF(argp->taglen);
1da177e4 1896 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1897 READ_BUF(8);
06553991
BF		 1898 argp->minorversion = be32_to_cpup(p++);
1899 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1900 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1901
1902 if (argp->taglen > NFSD4_MAX_TAGLEN)
1903 goto xdr_error;
1904 if (argp->opcnt > 100)
1905 goto xdr_error;
1906
e8c96f8c 1907 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1908 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1909 if (!argp->ops) {
1910 argp->ops = argp->iops;
817cb9d4 1911 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1912 goto xdr_error;
1913 }
1914 }
1915
e1a90ebd 1916 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1917 argp->opcnt = 0;
1918
1da177e4
LT		 1919 for (i = 0; i < argp->opcnt; i++) {
1920 op = &argp->ops[i];
1921 op->replay = NULL;
1922
8a61b18c 1923 READ_BUF(4);
06553991 1924 op->opnum = be32_to_cpup(p++);
1da177e4 1925
e1a90ebd
AS		 1926 if (nfsd4_opnum_in_range(argp, op))
1927 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1928 else {
1da177e4
LT		 1929 op->opnum = OP_ILLEGAL;
1930 op->status = nfserr_op_illegal;
1da177e4 1931 }
1091006c
BF		 1932 /*
1933 * We'll try to cache the result in the DRC if any one
1934 * op in the compound wants to be cached:
1935 */
1936 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1937
b0e35fda
BF		 1938 if (op->opnum == OP_READ) {
1939 readcount++;
1940 readbytes += nfsd4_max_reply(argp->rqstp, op);
1941 } else
1942 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c
BF		 1943 /*
1944 * OP_LOCK may return a conflicting lock. (Special case
1945 * because it will just skip encoding this if it runs
1946 * out of xdr buffer space, and it is the only operation
1947 * that behaves this way.)
1948 */
1949 if (op->opnum == OP_LOCK)
1950 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1951
1952 if (op->status) {
1953 argp->opcnt = i+1;
1954 break;
1955 }
1da177e4 1956 }
1091006c
BF		 1957 /* Sessions make the DRC unnecessary: */
1958 if (argp->minorversion)
1959 cachethis = false;
b0e35fda 1960 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1961 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1962
a5cddc88 1963 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1964 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1965
1da177e4
LT		 1966 DECODE_TAIL;
1967}
1da177e4 1968
d05d5744 1969static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1970{
1971 if (IS_I_VERSION(inode)) {
d05d5744 1972 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1973 } else {
d05d5744
BF		 1974 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1975 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1976 }
d05d5744 1977 return p;
c654b8a9
BF		 1978}
1979
d05d5744 1980static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1981{
d05d5744 1982 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1983 if (c->change_supported) {
d05d5744
BF		 1984 p = xdr_encode_hyper(p, c->before_change);
1985 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1986 } else {
d05d5744
BF		 1987 *p++ = cpu_to_be32(c->before_ctime_sec);
1988 *p++ = cpu_to_be32(c->before_ctime_nsec);
1989 *p++ = cpu_to_be32(c->after_ctime_sec);
1990 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1991 }
d05d5744 1992 return p;
c654b8a9 1993}
1da177e4 1994
81c3f413 1995/* Encode as an array of strings the string given with components
e7a0444a 1996 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1997 */
ddd1ea56
BF		 1998static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1999 char *components, char esc_enter,
2000 char esc_exit)
81c3f413 2001{
ddd1ea56 2002 __be32 *p;
082d4bd7
BF		 2003 __be32 pathlen;
2004 int pathlen_offset;
81c3f413 2005 int strlen, count=0;
e7a0444a 2006 char *str, *end, *next;
81c3f413
BF		 2007
2008 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2009
2010 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2011 p = xdr_reserve_space(xdr, 4);
2012 if (!p)
81c3f413 2013 return nfserr_resource;
082d4bd7
BF		 2014 p++; /* We will fill this in with @count later */
2015
81c3f413
BF		 2016 end = str = components;
2017 while (*end) {
e7a0444a
WAA		 2018 bool found_esc = false;
2019
2020 /* try to parse as esc_start, ..., esc_end, sep */
2021 if (*str == esc_enter) {
2022 for (; *end && (*end != esc_exit); end++)
2023 /* find esc_exit or end of string */;
2024 next = end + 1;
2025 if (*end && (!*next || *next == sep)) {
2026 str++;
2027 found_esc = true;
2028 }
2029 }
2030
2031 if (!found_esc)
2032 for (; *end && (*end != sep); end++)
2033 /* find sep or end of string */;
2034
81c3f413
BF		 2035 strlen = end - str;
2036 if (strlen) {
ddd1ea56
BF		 2037 p = xdr_reserve_space(xdr, strlen + 4);
2038 if (!p)
81c3f413 2039 return nfserr_resource;
0c0c267b 2040 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2041 count++;
2042 }
2043 else
2044 end++;
5a64e569
BC		 2045 if (found_esc)
2046 end = next;
2047
81c3f413
BF		 2048 str = end;
2049 }
bf7491f1 2050 pathlen = htonl(count);
082d4bd7 2051 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2052 return 0;
2053}
2054
e7a0444a
WAA		 2055/* Encode as an array of strings the string given with components
2056 * separated @sep.
2057 */
ddd1ea56
BF		 2058static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2059 char *components)
e7a0444a 2060{
ddd1ea56 2061 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2062}
2063
81c3f413
BF		 2064/*
2065 * encode a location element of a fs_locations structure
2066 */
ddd1ea56
BF		 2067static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2068 struct nfsd4_fs_location *location)
81c3f413 2069{
b37ad28b 2070 __be32 status;
81c3f413 2071
ddd1ea56 2072 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2073 '[', ']');
81c3f413
BF		 2074 if (status)
2075 return status;
ddd1ea56 2076 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2077 if (status)
2078 return status;
81c3f413
BF		 2079 return 0;
2080}
2081
2082/*
ed748aac 2083 * Encode a path in RFC3530 'pathname4' format
81c3f413 2084 */
ddd1ea56
BF		 2085static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2086 const struct path *root,
2087 const struct path *path)
81c3f413 2088{
301f0268 2089 struct path cur = *path;
ddd1ea56 2090 __be32 *p;
ed748aac
TM		 2091 struct dentry **components = NULL;
2092 unsigned int ncomponents = 0;
2093 __be32 err = nfserr_jukebox;
81c3f413 2094
ed748aac 2095 dprintk("nfsd4_encode_components(");
81c3f413 2096
ed748aac
TM		 2097 path_get(&cur);
2098 /* First walk the path up to the nfsd root, and store the
2099 * dentries/path components in an array.
2100 */
2101 for (;;) {
b77a4b2e 2102 if (path_equal(&cur, root))
ed748aac
TM		 2103 break;
2104 if (cur.dentry == cur.mnt->mnt_root) {
2105 if (follow_up(&cur))
2106 continue;
2107 goto out_free;
2108 }
2109 if ((ncomponents & 15) == 0) {
2110 struct dentry **new;
2111 new = krealloc(components,
2112 sizeof(*new) * (ncomponents + 16),
2113 GFP_KERNEL);
2114 if (!new)
2115 goto out_free;
2116 components = new;
2117 }
2118 components[ncomponents++] = cur.dentry;
2119 cur.dentry = dget_parent(cur.dentry);
2120 }
ddd1ea56
BF		 2121 err = nfserr_resource;
2122 p = xdr_reserve_space(xdr, 4);
2123 if (!p)
ed748aac 2124 goto out_free;
c373b0a4 2125 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2126
2127 while (ncomponents) {
2128 struct dentry *dentry = components[ncomponents - 1];
301f0268 2129 unsigned int len;
ed748aac 2130
301f0268
AV		 2131 spin_lock(&dentry->d_lock);
2132 len = dentry->d_name.len;
ddd1ea56
BF		 2133 p = xdr_reserve_space(xdr, len + 4);
2134 if (!p) {
301f0268 2135 spin_unlock(&dentry->d_lock);
ed748aac 2136 goto out_free;
301f0268 2137 }
0c0c267b 2138 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2139 dprintk("/%pd", dentry);
301f0268 2140 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2141 dput(dentry);
2142 ncomponents--;
81c3f413 2143 }
ed748aac 2144
ed748aac
TM		 2145 err = 0;
2146out_free:
2147 dprintk(")\n");
2148 while (ncomponents)
2149 dput(components[--ncomponents]);
2150 kfree(components);
2151 path_put(&cur);
2152 return err;
2153}
2154
ddd1ea56
BF		 2155static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2156 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2157{
2158 struct svc_export *exp_ps;
2159 __be32 res;
2160
2161 exp_ps = rqst_find_fsidzero_export(rqstp);
2162 if (IS_ERR(exp_ps))
2163 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2164 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2165 exp_put(exp_ps);
2166 return res;
81c3f413
BF		 2167}
2168
2169/*
2170 * encode a fs_locations structure
2171 */
ddd1ea56
BF		 2172static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2173 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2174{
b37ad28b 2175 __be32 status;
cc45f017 2176 int i;
ddd1ea56 2177 __be32 *p;
81c3f413 2178 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2179
ddd1ea56 2180 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2181 if (status)
2182 return status;
ddd1ea56
BF		 2183 p = xdr_reserve_space(xdr, 4);
2184 if (!p)
81c3f413 2185 return nfserr_resource;
c373b0a4 2186 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2187 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2188 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2189 if (status)
2190 return status;
2191 }
81c3f413
BF		 2192 return 0;
2193}
1da177e4 2194
3d2544b1
BF		 2195static u32 nfs4_file_type(umode_t mode)
2196{
2197 switch (mode & S_IFMT) {
2198 case S_IFIFO: return NF4FIFO;
2199 case S_IFCHR: return NF4CHR;
2200 case S_IFDIR: return NF4DIR;
2201 case S_IFBLK: return NF4BLK;
2202 case S_IFLNK: return NF4LNK;
2203 case S_IFREG: return NF4REG;
2204 case S_IFSOCK: return NF4SOCK;
2205 default: return NF4BAD;
2206 };
2207}
1da177e4 2208
b37ad28b 2209static inline __be32
ddd1ea56
BF		 2210nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2211 struct nfs4_ace *ace)
1da177e4 2212{
3554116d 2213 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2214 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2215 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2216 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2217 else
ddd1ea56 2218 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2219}
2220
6896f15a 2221static inline __be32
8a4c3926 2222nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2223{
8a4c3926
JL		 2224 __be32 *p;
2225 unsigned long i = hweight_long(layout_types);
6896f15a 2226
8a4c3926
JL		 2227 p = xdr_reserve_space(xdr, 4 + 4 * i);
2228 if (!p)
2229 return nfserr_resource;
2230
2231 *p++ = cpu_to_be32(i);
2232
2233 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2234 if (layout_types & (1 << i))
2235 *p++ = cpu_to_be32(i);
6896f15a
KM		 2236
2237 return 0;
2238}
2239
42ca0993
BF		 2240#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2241 FATTR4_WORD0_RDATTR_ERROR)
2242#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2243#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2244
18032ca0
DQ		 2245#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2246static inline __be32
ddd1ea56
BF		 2247nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2248 void *context, int len)
18032ca0 2249{
ddd1ea56 2250 __be32 *p;
18032ca0 2251
ddd1ea56
BF		 2252 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2253 if (!p)
18032ca0
DQ		 2254 return nfserr_resource;
2255
2256 /*
2257 * For now we use a 0 here to indicate the null translation; in
2258 * the future we may place a call to translation code here.
2259 */
c373b0a4
BF		 2260 *p++ = cpu_to_be32(0); /* lfs */
2261 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2262 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2263 return 0;
2264}
2265#else
2266static inline __be32
ddd1ea56
BF		 2267nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2268 void *context, int len)
18032ca0
DQ		 2269{ return 0; }
2270#endif
2271
c2227a39 2272static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2273{
2274 /* As per referral draft: */
2275 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2276 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2277 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2278 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2279 *rdattr_err = NFSERR_MOVED;
2280 else
2281 return nfserr_moved;
2282 }
2283 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2284 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2285 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2286 return 0;
2287}
1da177e4 2288
ae7095a7
BF		 2289
2290static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2291{
2292 struct path path = exp->ex_path;
2293 int err;
2294
2295 path_get(&path);
2296 while (follow_up(&path)) {
2297 if (path.dentry != path.mnt->mnt_root)
2298 break;
2299 }
3dadecce 2300 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2301 path_put(&path);
2302 return err;
2303}
2304
75976de6
KM		 2305static __be32
2306nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2307{
2308 __be32 *p;
2309
2310 if (bmval2) {
2311 p = xdr_reserve_space(xdr, 16);
2312 if (!p)
2313 goto out_resource;
2314 *p++ = cpu_to_be32(3);
2315 *p++ = cpu_to_be32(bmval0);
2316 *p++ = cpu_to_be32(bmval1);
2317 *p++ = cpu_to_be32(bmval2);
2318 } else if (bmval1) {
2319 p = xdr_reserve_space(xdr, 12);
2320 if (!p)
2321 goto out_resource;
2322 *p++ = cpu_to_be32(2);
2323 *p++ = cpu_to_be32(bmval0);
2324 *p++ = cpu_to_be32(bmval1);
2325 } else {
2326 p = xdr_reserve_space(xdr, 8);
2327 if (!p)
2328 goto out_resource;
2329 *p++ = cpu_to_be32(1);
2330 *p++ = cpu_to_be32(bmval0);
2331 }
2332
2333 return 0;
2334out_resource:
2335 return nfserr_resource;
2336}
2337
1da177e4
LT		 2338/*
2339 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2340 * ourselves.
1da177e4 2341 */
da2ebce6 2342static __be32
d5184658
BF		 2343nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2344 struct svc_export *exp,
2345 struct dentry *dentry, u32 *bmval,
406a7ea9 2346 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2347{
2348 u32 bmval0 = bmval[0];
2349 u32 bmval1 = bmval[1];
7e705706 2350 u32 bmval2 = bmval[2];
1da177e4 2351 struct kstat stat;
d50e6136 2352 struct svc_fh *tempfh = NULL;
1da177e4 2353 struct kstatfs statfs;
ddd1ea56 2354 __be32 *p;
1fcea5b2 2355 int starting_len = xdr->buf->len;
082d4bd7
BF		 2356 int attrlen_offset;
2357 __be32 attrlen;
1da177e4
LT		 2358 u32 dummy;
2359 u64 dummy64;
42ca0993 2360 u32 rdattr_err = 0;
b37ad28b 2361 __be32 status;
b8dd7b9a 2362 int err;
1da177e4 2363 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2364 void *context = NULL;
2365 int contextlen;
2366 bool contextsupport = false;
7e705706
AA		 2367 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2368 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2369 struct path path = {
2370 .mnt = exp->ex_path.mnt,
2371 .dentry = dentry,
2372 };
3d733711 2373 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2374
2375 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2376 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2377
42ca0993 2378 if (exp->ex_fslocs.migrated) {
c2227a39 2379 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2380 if (status)
2381 goto out;
2382 }
2383
3dadecce 2384 err = vfs_getattr(&path, &stat);
b8dd7b9a 2385 if (err)
1da177e4 2386 goto out_nfserr;
12337901
CH		 2387 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2388 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2389 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2390 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2391 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2392 if (err)
1da177e4
LT		 2393 goto out_nfserr;
2394 }
2395 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2396 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2397 status = nfserr_jukebox;
2398 if (!tempfh)
2399 goto out;
2400 fh_init(tempfh, NFS4_FHSIZE);
2401 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2402 if (status)
2403 goto out;
d50e6136 2404 fhp = tempfh;
1da177e4 2405 }
0c9d65e7 2406 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2407 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2408 if (err == -EOPNOTSUPP)
2409 bmval0 &= ~FATTR4_WORD0_ACL;
2410 else if (err == -EINVAL) {
2411 status = nfserr_attrnotsupp;
2412 goto out;
2413 } else if (err != 0)
2414 goto out_nfserr;
1da177e4 2415 }
1da177e4 2416
18032ca0 2417#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2418 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2419 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2b0143b5 2420 err = security_inode_getsecctx(d_inode(dentry),
18032ca0
DQ		 2421 &context, &contextlen);
2422 contextsupport = (err == 0);
2423 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2424 if (err == -EOPNOTSUPP)
2425 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2426 else if (err)
2427 goto out_nfserr;
2428 }
2429 }
2430#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2431
75976de6
KM		 2432 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2433 if (status)
2434 goto out;
082d4bd7
BF		 2435
2436 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2437 p = xdr_reserve_space(xdr, 4);
2438 if (!p)
2439 goto out_resource;
082d4bd7 2440 p++; /* to be backfilled later */
1da177e4
LT		 2441
2442 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2443 u32 supp[3];
2444
2445 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2446
0c9d65e7 2447 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2448 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2449 if (!contextsupport)
916d2d84
BF		 2450 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2451 if (!supp[2]) {
ddd1ea56
BF		 2452 p = xdr_reserve_space(xdr, 12);
2453 if (!p)
2b44f1ba 2454 goto out_resource;
c373b0a4 2455 *p++ = cpu_to_be32(2);
916d2d84
BF		 2456 *p++ = cpu_to_be32(supp[0]);
2457 *p++ = cpu_to_be32(supp[1]);
7e705706 2458 } else {
ddd1ea56
BF		 2459 p = xdr_reserve_space(xdr, 16);
2460 if (!p)
2b44f1ba 2461 goto out_resource;
c373b0a4 2462 *p++ = cpu_to_be32(3);
916d2d84
BF		 2463 *p++ = cpu_to_be32(supp[0]);
2464 *p++ = cpu_to_be32(supp[1]);
2465 *p++ = cpu_to_be32(supp[2]);
7e705706 2466 }
1da177e4
LT		 2467 }
2468 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2469 p = xdr_reserve_space(xdr, 4);
2470 if (!p)
1da177e4 2471 goto out_resource;
3d2544b1 2472 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2473 if (dummy == NF4BAD) {
2474 status = nfserr_serverfault;
2475 goto out;
2476 }
c373b0a4 2477 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2478 }
2479 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2480 p = xdr_reserve_space(xdr, 4);
2481 if (!p)
1da177e4 2482 goto out_resource;
49640001 2483 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2484 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2485 else
c373b0a4
BF		 2486 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2487 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2488 }
2489 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2490 p = xdr_reserve_space(xdr, 8);
2491 if (!p)
1da177e4 2492 goto out_resource;
2b0143b5 2493 p = encode_change(p, &stat, d_inode(dentry));
1da177e4
LT		 2494 }
2495 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2496 p = xdr_reserve_space(xdr, 8);
2497 if (!p)
1da177e4 2498 goto out_resource;
b64c7f3b 2499 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2500 }
2501 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2502 p = xdr_reserve_space(xdr, 4);
2503 if (!p)
1da177e4 2504 goto out_resource;
c373b0a4 2505 *p++ = cpu_to_be32(1);
1da177e4
LT		 2506 }
2507 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2508 p = xdr_reserve_space(xdr, 4);
2509 if (!p)
1da177e4 2510 goto out_resource;
c373b0a4 2511 *p++ = cpu_to_be32(1);
1da177e4
LT		 2512 }
2513 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2514 p = xdr_reserve_space(xdr, 4);
2515 if (!p)
1da177e4 2516 goto out_resource;
c373b0a4 2517 *p++ = cpu_to_be32(0);
1da177e4
LT		 2518 }
2519 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2520 p = xdr_reserve_space(xdr, 16);
2521 if (!p)
1da177e4 2522 goto out_resource;
42ca0993 2523 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2524 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2525 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2526 } else switch(fsid_source(fhp)) {
2527 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2528 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2529 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2530 break;
2531 case FSIDSOURCE_DEV:
c373b0a4
BF		 2532 *p++ = cpu_to_be32(0);
2533 *p++ = cpu_to_be32(MAJOR(stat.dev));
2534 *p++ = cpu_to_be32(0);
2535 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2536 break;
2537 case FSIDSOURCE_UUID:
94eb3689
KM		 2538 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2539 EX_UUID_LEN);
af6a4e28 2540 break;
1da177e4
LT		 2541 }
2542 }
2543 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2544 p = xdr_reserve_space(xdr, 4);
2545 if (!p)
1da177e4 2546 goto out_resource;
c373b0a4 2547 *p++ = cpu_to_be32(0);
1da177e4
LT		 2548 }
2549 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2550 p = xdr_reserve_space(xdr, 4);
2551 if (!p)
1da177e4 2552 goto out_resource;
c373b0a4 2553 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2554 }
2555 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2556 p = xdr_reserve_space(xdr, 4);
2557 if (!p)
1da177e4 2558 goto out_resource;
c373b0a4 2559 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2560 }
2561 if (bmval0 & FATTR4_WORD0_ACL) {
2562 struct nfs4_ace *ace;
1da177e4
LT		 2563
2564 if (acl == NULL) {
ddd1ea56
BF		 2565 p = xdr_reserve_space(xdr, 4);
2566 if (!p)
1da177e4
LT		 2567 goto out_resource;
2568
c373b0a4 2569 *p++ = cpu_to_be32(0);
1da177e4
LT		 2570 goto out_acl;
2571 }
ddd1ea56
BF		 2572 p = xdr_reserve_space(xdr, 4);
2573 if (!p)
1da177e4 2574 goto out_resource;
c373b0a4 2575 *p++ = cpu_to_be32(acl->naces);
1da177e4 2576
28e05dd8 2577 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2578 p = xdr_reserve_space(xdr, 4*3);
2579 if (!p)
1da177e4 2580 goto out_resource;
c373b0a4
BF		 2581 *p++ = cpu_to_be32(ace->type);
2582 *p++ = cpu_to_be32(ace->flag);
2583 *p++ = cpu_to_be32(ace->access_mask &
2584 NFS4_ACE_MASK_ALL);
ddd1ea56 2585 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2586 if (status)
2587 goto out;
2588 }
2589 }
2590out_acl:
2591 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2592 p = xdr_reserve_space(xdr, 4);
2593 if (!p)
1da177e4 2594 goto out_resource;
0c9d65e7 2595 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2596 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2597 }
2598 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2599 p = xdr_reserve_space(xdr, 4);
2600 if (!p)
1da177e4 2601 goto out_resource;
c373b0a4 2602 *p++ = cpu_to_be32(1);
1da177e4
LT		 2603 }
2604 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2605 p = xdr_reserve_space(xdr, 4);
2606 if (!p)
1da177e4 2607 goto out_resource;
c373b0a4 2608 *p++ = cpu_to_be32(0);
1da177e4
LT		 2609 }
2610 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2611 p = xdr_reserve_space(xdr, 4);
2612 if (!p)
1da177e4 2613 goto out_resource;
c373b0a4 2614 *p++ = cpu_to_be32(1);
1da177e4
LT		 2615 }
2616 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2617 p = xdr_reserve_space(xdr, 4);
2618 if (!p)
1da177e4 2619 goto out_resource;
c373b0a4 2620 *p++ = cpu_to_be32(1);
1da177e4
LT		 2621 }
2622 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2623 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2624 if (!p)
1da177e4 2625 goto out_resource;
0c0c267b
BF		 2626 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2627 fhp->fh_handle.fh_size);
1da177e4
LT		 2628 }
2629 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2630 p = xdr_reserve_space(xdr, 8);
2631 if (!p)
1da177e4 2632 goto out_resource;
b64c7f3b 2633 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2634 }
2635 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2636 p = xdr_reserve_space(xdr, 8);
2637 if (!p)
1da177e4 2638 goto out_resource;
b64c7f3b 2639 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2640 }
2641 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2642 p = xdr_reserve_space(xdr, 8);
2643 if (!p)
1da177e4 2644 goto out_resource;
b64c7f3b 2645 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2646 }
2647 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2648 p = xdr_reserve_space(xdr, 8);
2649 if (!p)
1da177e4 2650 goto out_resource;
b64c7f3b 2651 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2652 }
81c3f413 2653 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2654 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2655 if (status)
2656 goto out;
2657 }
1da177e4 2658 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2659 p = xdr_reserve_space(xdr, 4);
2660 if (!p)
1da177e4 2661 goto out_resource;
c373b0a4 2662 *p++ = cpu_to_be32(1);
1da177e4
LT		 2663 }
2664 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2665 p = xdr_reserve_space(xdr, 8);
2666 if (!p)
1da177e4 2667 goto out_resource;
b64c7f3b 2668 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2669 }
2670 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2671 p = xdr_reserve_space(xdr, 4);
2672 if (!p)
1da177e4 2673 goto out_resource;
c373b0a4 2674 *p++ = cpu_to_be32(255);
1da177e4
LT		 2675 }
2676 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2677 p = xdr_reserve_space(xdr, 4);
2678 if (!p)
1da177e4 2679 goto out_resource;
c373b0a4 2680 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2681 }
2682 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2683 p = xdr_reserve_space(xdr, 8);
2684 if (!p)
1da177e4 2685 goto out_resource;
b64c7f3b 2686 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2687 }
2688 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2689 p = xdr_reserve_space(xdr, 8);
2690 if (!p)
1da177e4 2691 goto out_resource;
b64c7f3b 2692 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2693 }
2694 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2695 p = xdr_reserve_space(xdr, 4);
2696 if (!p)
1da177e4 2697 goto out_resource;
c373b0a4 2698 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2699 }
2700 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2701 p = xdr_reserve_space(xdr, 4);
2702 if (!p)
1da177e4 2703 goto out_resource;
c373b0a4 2704 *p++ = cpu_to_be32(1);
1da177e4
LT		 2705 }
2706 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2707 p = xdr_reserve_space(xdr, 4);
2708 if (!p)
1da177e4 2709 goto out_resource;
c373b0a4 2710 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2711 }
2712 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2713 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2714 if (status)
2715 goto out;
2716 }
2717 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2718 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2719 if (status)
2720 goto out;
2721 }
2722 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2723 p = xdr_reserve_space(xdr, 8);
2724 if (!p)
1da177e4 2725 goto out_resource;
c373b0a4
BF		 2726 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2727 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2728 }
2729 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2730 p = xdr_reserve_space(xdr, 8);
2731 if (!p)
1da177e4
LT		 2732 goto out_resource;
2733 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2734 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2735 }
2736 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2737 p = xdr_reserve_space(xdr, 8);
2738 if (!p)
1da177e4
LT		 2739 goto out_resource;
2740 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2741 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2742 }
2743 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2744 p = xdr_reserve_space(xdr, 8);
2745 if (!p)
1da177e4
LT		 2746 goto out_resource;
2747 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2748 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2749 }
2750 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2751 p = xdr_reserve_space(xdr, 8);
2752 if (!p)
1da177e4
LT		 2753 goto out_resource;
2754 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2755 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2756 }
2757 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2758 p = xdr_reserve_space(xdr, 12);
2759 if (!p)
1da177e4 2760 goto out_resource;
b64c7f3b 2761 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2762 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2763 }
2764 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2765 p = xdr_reserve_space(xdr, 12);
2766 if (!p)
1da177e4 2767 goto out_resource;
c373b0a4
BF		 2768 *p++ = cpu_to_be32(0);
2769 *p++ = cpu_to_be32(1);
2770 *p++ = cpu_to_be32(0);
1da177e4
LT		 2771 }
2772 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2773 p = xdr_reserve_space(xdr, 12);
2774 if (!p)
1da177e4 2775 goto out_resource;
b64c7f3b 2776 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2777 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2778 }
2779 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2780 p = xdr_reserve_space(xdr, 12);
2781 if (!p)
1da177e4 2782 goto out_resource;
b64c7f3b 2783 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2784 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2785 }
2786 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2787 struct kstat parent_stat;
2788 u64 ino = stat.ino;
2789
ddd1ea56
BF		 2790 p = xdr_reserve_space(xdr, 8);
2791 if (!p)
1da177e4 2792 goto out_resource;
406a7ea9
FF		 2793 /*
2794 * Get parent's attributes if not ignoring crossmount
2795 * and this is the root of a cross-mounted filesystem.
2796 */
2797 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2798 dentry == exp->ex_path.mnt->mnt_root) {
2799 err = get_parent_attributes(exp, &parent_stat);
2800 if (err)
2801 goto out_nfserr;
2802 ino = parent_stat.ino;
2803 }
2804 p = xdr_encode_hyper(p, ino);
1da177e4 2805 }
9cf514cc 2806#ifdef CONFIG_NFSD_PNFS
6896f15a 2807 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2808 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2809 if (status)
2810 goto out;
2811 }
2812
2813 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2814 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2815 if (status)
2816 goto out;
9cf514cc
CH		 2817 }
2818
2819 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2820 p = xdr_reserve_space(xdr, 4);
2821 if (!p)
2822 goto out_resource;
2823 *p++ = cpu_to_be32(stat.blksize);
2824 }
2825#endif /* CONFIG_NFSD_PNFS */
8c18f205 2826 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
75976de6
KM		 2827 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2828 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2829 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2830 if (status)
2831 goto out;
8c18f205 2832 }
7e705706 2833
7d580722
KM		 2834 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2835 status = nfsd4_encode_security_label(xdr, rqstp, context,
2836 contextlen);
2837 if (status)
2838 goto out;
2839 }
2840
082d4bd7
BF		 2841 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2842 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2843 status = nfs_ok;
2844
2845out:
ba4e55bb 2846#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2847 if (context)
2848 security_release_secctx(context, contextlen);
ba4e55bb 2849#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2850 kfree(acl);
18df11d0 2851 if (tempfh) {
d50e6136 2852 fh_put(tempfh);
18df11d0
YZ		 2853 kfree(tempfh);
2854 }
1fcea5b2
BF		 2855 if (status)
2856 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2857 return status;
2858out_nfserr:
b8dd7b9a 2859 status = nfserrno(err);
1da177e4
LT		 2860 goto out;
2861out_resource:
1da177e4
LT		 2862 status = nfserr_resource;
2863 goto out;
1da177e4
LT		 2864}
2865
2825a7f9
BF		 2866static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2867 struct xdr_buf *buf, __be32 *p, int bytes)
2868{
2869 xdr->scratch.iov_len = 0;
2870 memset(buf, 0, sizeof(struct xdr_buf));
2871 buf->head[0].iov_base = p;
2872 buf->head[0].iov_len = 0;
2873 buf->len = 0;
2874 xdr->buf = buf;
2875 xdr->iov = buf->head;
2876 xdr->p = p;
2877 xdr->end = (void *)p + bytes;
2878 buf->buflen = bytes;
2879}
2880
d5184658
BF		 2881__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2882 struct svc_fh *fhp, struct svc_export *exp,
2883 struct dentry *dentry, u32 *bmval,
2884 struct svc_rqst *rqstp, int ignore_crossmnt)
2885{
2825a7f9 2886 struct xdr_buf dummy;
d5184658
BF		 2887 struct xdr_stream xdr;
2888 __be32 ret;
2889
2825a7f9 2890 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2891 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2892 ignore_crossmnt);
2893 *p = xdr.p;
2894 return ret;
2895}
2896
c0ce6ec8
BF		 2897static inline int attributes_need_mount(u32 *bmval)
2898{
2899 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2900 return 1;
2901 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2902 return 1;
2903 return 0;
2904}
2905
b37ad28b 2906static __be32
561f0ed4
BF		 2907nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2908 const char *name, int namlen)
1da177e4
LT		 2909{
2910 struct svc_export *exp = cd->rd_fhp->fh_export;
2911 struct dentry *dentry;
b37ad28b 2912 __be32 nfserr;
406a7ea9 2913 int ignore_crossmnt = 0;
1da177e4 2914
bbddca8e 2915 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2916 if (IS_ERR(dentry))
2917 return nfserrno(PTR_ERR(dentry));
2b0143b5 2918 if (d_really_is_negative(dentry)) {
b2c0cea6 2919 /*
bbddca8e
N		 2920 * we're not holding the i_mutex here, so there's
2921 * a window where this directory entry could have gone
2922 * away.
b2c0cea6
BF		 2923 */
2924 dput(dentry);
2925 return nfserr_noent;
2926 }
1da177e4
LT		 2927
2928 exp_get(exp);
406a7ea9
FF		 2929 /*
2930 * In the case of a mountpoint, the client may be asking for
2931 * attributes that are only properties of the underlying filesystem
2932 * as opposed to the cross-mounted file system. In such a case,
2933 * we will not follow the cross mount and will fill the attribtutes
2934 * directly from the mountpoint dentry.
2935 */
3227fa41 2936 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2937 int err;
2938
3227fa41
BF		 2939 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2940 && !attributes_need_mount(cd->rd_bmval)) {
2941 ignore_crossmnt = 1;
2942 goto out_encode;
2943 }
dcb488a3
AA		 2944 /*
2945 * Why the heck aren't we just using nfsd_lookup??
2946 * Different "."/".." handling? Something else?
2947 * At least, add a comment here to explain....
2948 */
021d3a72
BF		 2949 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2950 if (err) {
2951 nfserr = nfserrno(err);
1da177e4
LT		 2952 goto out_put;
2953 }
dcb488a3
AA		 2954 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2955 if (nfserr)
2956 goto out_put;
1da177e4
LT		 2957
2958 }
3227fa41 2959out_encode:
561f0ed4 2960 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2961 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2962out_put:
2963 dput(dentry);
2964 exp_put(exp);
2965 return nfserr;
2966}
2967
2ebbc012 2968static __be32 *
561f0ed4 2969nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2970{
561f0ed4
BF		 2971 __be32 *p;
2972
c3a45617 2973 p = xdr_reserve_space(xdr, 20);
561f0ed4 2974 if (!p)
1da177e4
LT		 2975 return NULL;
2976 *p++ = htonl(2);
2977 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2978 *p++ = htonl(0); /* bmval1 */
2979
87915c64 2980 *p++ = htonl(4); /* attribute length */
1da177e4 2981 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2982 return p;
2983}
2984
2985static int
a0ad13ef
N		 2986nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2987 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2988{
a0ad13ef 2989 struct readdir_cd *ccd = ccdv;
1da177e4 2990 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2991 struct xdr_stream *xdr = cd->xdr;
2992 int start_offset = xdr->buf->len;
2993 int cookie_offset;
aee37764 2994 u32 name_and_cookie;
561f0ed4 2995 int entry_bytes;
b37ad28b 2996 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2997 __be64 wire_offset;
2998 __be32 *p;
1da177e4
LT		 2999
3000 /* In nfsv4, "." and ".." never make it onto the wire.. */
3001 if (name && isdotent(name, namlen)) {
3002 cd->common.err = nfs_ok;
3003 return 0;
3004 }
3005
561f0ed4
BF		 3006 if (cd->cookie_offset) {
3007 wire_offset = cpu_to_be64(offset);
3008 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3009 &wire_offset, 8);
3010 }
1da177e4 3011
561f0ed4
BF		 3012 p = xdr_reserve_space(xdr, 4);
3013 if (!p)
1da177e4 3014 goto fail;
1da177e4 3015 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3016 cookie_offset = xdr->buf->len;
3017 p = xdr_reserve_space(xdr, 3*4 + namlen);
3018 if (!p)
3019 goto fail;
1da177e4
LT		 3020 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3021 p = xdr_encode_array(p, name, namlen); /* name length & name */
3022
561f0ed4 3023 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3024 switch (nfserr) {
3025 case nfs_ok:
1da177e4
LT		 3026 break;
3027 case nfserr_resource:
3028 nfserr = nfserr_toosmall;
3029 goto fail;
b2c0cea6 3030 case nfserr_noent:
f41c5ad2 3031 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3032 goto skip_entry;
1da177e4
LT		 3033 default:
3034 /*
3035 * If the client requested the RDATTR_ERROR attribute,
3036 * we stuff the error code into this attribute
3037 * and continue. If this attribute was not requested,
3038 * then in accordance with the spec, we fail the
3039 * entire READDIR operation(!)
3040 */
3041 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3042 goto fail;
561f0ed4 3043 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3044 if (p == NULL) {
3045 nfserr = nfserr_toosmall;
1da177e4 3046 goto fail;
34081efc 3047 }
1da177e4 3048 }
561f0ed4
BF		 3049 nfserr = nfserr_toosmall;
3050 entry_bytes = xdr->buf->len - start_offset;
3051 if (entry_bytes > cd->rd_maxcount)
3052 goto fail;
3053 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3054 /*
3055 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3056 * let's always let through the first entry, at least:
3057 */
0ec016e3
BF		 3058 if (!cd->rd_dircount)
3059 goto fail;
3060 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3061 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3062 goto fail;
3063 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3064
561f0ed4 3065 cd->cookie_offset = cookie_offset;
b2c0cea6 3066skip_entry:
1da177e4
LT		 3067 cd->common.err = nfs_ok;
3068 return 0;
3069fail:
561f0ed4 3070 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3071 cd->common.err = nfserr;
3072 return -EINVAL;
3073}
3074
d0a381dd
BF		 3075static __be32
3076nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3077{
bc749ca4 3078 __be32 *p;
e2f282b9 3079
d0a381dd
BF		 3080 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3081 if (!p)
3082 return nfserr_resource;
c373b0a4 3083 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3084 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3085 sizeof(stateid_opaque_t));
d0a381dd 3086 return 0;
e2f282b9
BH		 3087}
3088
695e12f8 3089static __be32
b37ad28b 3090nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3091{
d0a381dd 3092 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3093 __be32 *p;
1da177e4
LT		 3094
3095 if (!nfserr) {
d0a381dd
BF		 3096 p = xdr_reserve_space(xdr, 8);
3097 if (!p)
3098 return nfserr_resource;
c373b0a4
BF		 3099 *p++ = cpu_to_be32(access->ac_supported);
3100 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 3101 }
695e12f8 3102 return nfserr;
1da177e4
LT		 3103}
3104
1d1bc8f2
BF		 3105static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3106{
d0a381dd 3107 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3108 __be32 *p;
3109
3110 if (!nfserr) {
d0a381dd
BF		 3111 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3112 if (!p)
3113 return nfserr_resource;
0c0c267b
BF		 3114 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3115 NFS4_MAX_SESSIONID_LEN);
c373b0a4 3116 *p++ = cpu_to_be32(bcts->dir);
4ce85c8c 3117 /* Upshifting from TCP to RDMA is not supported */
c373b0a4 3118 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 3119 }
3120 return nfserr;
3121}
3122
695e12f8 3123static __be32
b37ad28b 3124nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3125{
d0a381dd
BF		 3126 struct xdr_stream *xdr = &resp->xdr;
3127
e2f282b9 3128 if (!nfserr)
d0a381dd 3129 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 3130
695e12f8 3131 return nfserr;
1da177e4
LT		 3132}
3133
3134
695e12f8 3135static __be32
b37ad28b 3136nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3137{
d0a381dd 3138 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3139 __be32 *p;
1da177e4
LT		 3140
3141 if (!nfserr) {
d0a381dd
BF		 3142 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3143 if (!p)
3144 return nfserr_resource;
0c0c267b
BF		 3145 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3146 NFS4_VERIFIER_SIZE);
1da177e4 3147 }
695e12f8 3148 return nfserr;
1da177e4
LT		 3149}
3150
695e12f8 3151static __be32
b37ad28b 3152nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3153{
d0a381dd 3154 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3155 __be32 *p;
1da177e4
LT		 3156
3157 if (!nfserr) {
75976de6 3158 p = xdr_reserve_space(xdr, 20);
d0a381dd
BF		 3159 if (!p)
3160 return nfserr_resource;
75976de6
KM		 3161 encode_cinfo(p, &create->cr_cinfo);
3162 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3163 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4 3164 }
695e12f8 3165 return nfserr;
1da177e4
LT		 3166}
3167
b37ad28b
AV		 3168static __be32
3169nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3170{
3171 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3172 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 3173
3174 if (nfserr)
3175 return nfserr;
3176
d5184658
BF		 3177 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3178 getattr->ga_bmval,
406a7ea9 3179 resp->rqstp, 0);
1da177e4
LT		 3180 return nfserr;
3181}
3182
695e12f8
BH		 3183static __be32
3184nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3185{
d0a381dd 3186 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3187 struct svc_fh *fhp = *fhpp;
1da177e4 3188 unsigned int len;
bc749ca4 3189 __be32 *p;
1da177e4
LT		 3190
3191 if (!nfserr) {
3192 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 3193 p = xdr_reserve_space(xdr, len + 4);
3194 if (!p)
3195 return nfserr_resource;
0c0c267b 3196 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 3197 }
695e12f8 3198 return nfserr;
1da177e4
LT		 3199}
3200
3201/*
3202* Including all fields other than the name, a LOCK4denied structure requires
3203* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3204*/
d0a381dd
BF		 3205static __be32
3206nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3207{
7c13f344 3208 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3209 __be32 *p;
1da177e4 3210
8c7424cf 3211again:
d0a381dd 3212 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3213 if (!p) {
3214 /*
3215 * Don't fail to return the result just because we can't
3216 * return the conflicting open:
3217 */
3218 if (conf->len) {
f98bac5a 3219 kfree(conf->data);
8c7424cf
BF		 3220 conf->len = 0;
3221 conf->data = NULL;
3222 goto again;
3223 }
d0a381dd 3224 return nfserr_resource;
8c7424cf 3225 }
b64c7f3b
BF		 3226 p = xdr_encode_hyper(p, ld->ld_start);
3227 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3228 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3229 if (conf->len) {
0c0c267b
BF		 3230 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3231 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3232 kfree(conf->data);
1da177e4 3233 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3234 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3235 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3236 }
d0a381dd 3237 return nfserr_denied;
1da177e4
LT		 3238}
3239
695e12f8 3240static __be32
b37ad28b 3241nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3242{
d0a381dd
BF		 3243 struct xdr_stream *xdr = &resp->xdr;
3244
e2f282b9 3245 if (!nfserr)
d0a381dd 3246 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3247 else if (nfserr == nfserr_denied)
d0a381dd 3248 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3249
695e12f8 3250 return nfserr;
1da177e4
LT		 3251}
3252
695e12f8 3253static __be32
b37ad28b 3254nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3255{
d0a381dd
BF		 3256 struct xdr_stream *xdr = &resp->xdr;
3257
1da177e4 3258 if (nfserr == nfserr_denied)
d0a381dd 3259 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3260 return nfserr;
1da177e4
LT		 3261}
3262
695e12f8 3263static __be32
b37ad28b 3264nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3265{
d0a381dd
BF		 3266 struct xdr_stream *xdr = &resp->xdr;
3267
e2f282b9 3268 if (!nfserr)
d0a381dd 3269 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 3270
695e12f8 3271 return nfserr;
1da177e4
LT		 3272}
3273
3274
695e12f8 3275static __be32
b37ad28b 3276nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3277{
d0a381dd 3278 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3279 __be32 *p;
1da177e4
LT		 3280
3281 if (!nfserr) {
d0a381dd
BF		 3282 p = xdr_reserve_space(xdr, 20);
3283 if (!p)
3284 return nfserr_resource;
d05d5744 3285 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 3286 }
695e12f8 3287 return nfserr;
1da177e4
LT		 3288}
3289
3290
695e12f8 3291static __be32
b37ad28b 3292nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3293{
d0a381dd 3294 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3295 __be32 *p;
1da177e4
LT		 3296
3297 if (nfserr)
3298 goto out;
3299
d0a381dd
BF		 3300 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3301 if (nfserr)
3302 goto out;
75976de6 3303 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3304 if (!p)
3305 return nfserr_resource;
d05d5744 3306 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3307 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3308
75976de6
KM		 3309 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3310 open->op_bmval[2]);
3311 if (nfserr)
3312 goto out;
3313
3314 p = xdr_reserve_space(xdr, 4);
3315 if (!p)
3316 return nfserr_resource;
3317
3318 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3319 switch (open->op_delegate_type) {
3320 case NFS4_OPEN_DELEGATE_NONE:
3321 break;
3322 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3323 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3324 if (nfserr)
3325 return nfserr;
3326 p = xdr_reserve_space(xdr, 20);
3327 if (!p)
3328 return nfserr_resource;
c373b0a4 3329 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3330
3331 /*
3332 * TODO: ACE's in delegations
3333 */
c373b0a4
BF		 3334 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3335 *p++ = cpu_to_be32(0);
3336 *p++ = cpu_to_be32(0);
3337 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3338 break;
3339 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3340 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3341 if (nfserr)
3342 return nfserr;
3343 p = xdr_reserve_space(xdr, 32);
3344 if (!p)
3345 return nfserr_resource;
c373b0a4 3346 *p++ = cpu_to_be32(0);
1da177e4
LT		 3347
3348 /*
3349 * TODO: space_limit's in delegations
3350 */
c373b0a4
BF		 3351 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3352 *p++ = cpu_to_be32(~(u32)0);
3353 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3354
3355 /*
3356 * TODO: ACE's in delegations
3357 */
c373b0a4
BF		 3358 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3359 *p++ = cpu_to_be32(0);
3360 *p++ = cpu_to_be32(0);
3361 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3362 break;
d24433cd
BH		 3363 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3364 switch (open->op_why_no_deleg) {
3365 case WND4_CONTENTION:
3366 case WND4_RESOURCE:
d0a381dd
BF		 3367 p = xdr_reserve_space(xdr, 8);
3368 if (!p)
3369 return nfserr_resource;
c373b0a4
BF		 3370 *p++ = cpu_to_be32(open->op_why_no_deleg);
3371 /* deleg signaling not supported yet: */
3372 *p++ = cpu_to_be32(0);
d24433cd
BH		 3373 break;
3374 default:
d0a381dd
BF		 3375 p = xdr_reserve_space(xdr, 4);
3376 if (!p)
3377 return nfserr_resource;
c373b0a4 3378 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3379 }
d24433cd 3380 break;
1da177e4
LT		 3381 default:
3382 BUG();
3383 }
3384 /* XXX save filehandle here */
3385out:
695e12f8 3386 return nfserr;
1da177e4
LT		 3387}
3388
695e12f8 3389static __be32
b37ad28b 3390nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3391{
d0a381dd
BF		 3392 struct xdr_stream *xdr = &resp->xdr;
3393
e2f282b9 3394 if (!nfserr)
d0a381dd 3395 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3396
695e12f8 3397 return nfserr;
1da177e4
LT		 3398}
3399
695e12f8 3400static __be32
b37ad28b 3401nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3402{
d0a381dd
BF		 3403 struct xdr_stream *xdr = &resp->xdr;
3404
e2f282b9 3405 if (!nfserr)
d0a381dd 3406 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3407
695e12f8 3408 return nfserr;
1da177e4
LT		 3409}
3410
dc97618d
BF		 3411static __be32 nfsd4_encode_splice_read(
3412 struct nfsd4_compoundres *resp,
3413 struct nfsd4_read *read,
3414 struct file *file, unsigned long maxcount)
1da177e4 3415{
ddd1ea56 3416 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3417 struct xdr_buf *buf = xdr->buf;
dc97618d 3418 u32 eof;
ac503e4a 3419 long len;
30596768 3420 int space_left;
dc97618d 3421 __be32 nfserr;
fec25fa4 3422 __be32 *p = xdr->p - 2;
1da177e4 3423
d5d5c304
KM		 3424 /* Make sure there will be room for padding if needed */
3425 if (xdr->end - xdr->p < 1)
d0a381dd 3426 return nfserr_resource;
dc97618d 3427
ac503e4a 3428 len = maxcount;
dc97618d
BF		 3429 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3430 read->rd_offset, &maxcount);
3431 if (nfserr) {
3432 /*
3433 * nfsd_splice_actor may have already messed with the
3434 * page length; reset it so as not to confuse
3435 * xdr_truncate_encode:
3436 */
34a78b48 3437 buf->page_len = 0;
dc97618d 3438 return nfserr;
b0e35fda 3439 }
1da177e4 3440
ac503e4a
BC		 3441 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3442 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3443
fec25fa4
BF		 3444 *(p++) = htonl(eof);
3445 *(p++) = htonl(maxcount);
dc97618d 3446
34a78b48
BF		 3447 buf->page_len = maxcount;
3448 buf->len += maxcount;
15b23ef5
BF		 3449 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3450 / PAGE_SIZE;
dc97618d
BF		 3451
3452 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3453 buf->tail[0].iov_base = xdr->p;
3454 buf->tail[0].iov_len = 0;
fec25fa4 3455 xdr->iov = buf->tail;
dc97618d 3456 if (maxcount&3) {
fec25fa4
BF		 3457 int pad = 4 - (maxcount&3);
3458
3459 *(xdr->p++) = 0;
3460
34a78b48 3461 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3462 buf->tail[0].iov_len = pad;
3463 buf->len += pad;
b0e35fda 3464 }
2825a7f9 3465
dc97618d 3466 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3467 buf->buflen - buf->len);
3468 buf->buflen = buf->len + space_left;
dc97618d
BF		 3469 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3470
3471 return 0;
3472}
3473
3474static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3475 struct nfsd4_read *read,
3476 struct file *file, unsigned long maxcount)
3477{
3478 struct xdr_stream *xdr = &resp->xdr;
3479 u32 eof;
3480 int v;
dc97618d 3481 int starting_len = xdr->buf->len - 8;
dc97618d 3482 long len;
b0420980 3483 int thislen;
dc97618d
BF		 3484 __be32 nfserr;
3485 __be32 tmp;
3486 __be32 *p;
b0420980
BF		 3487 u32 zzz = 0;
3488 int pad;
1da177e4
LT		 3489
3490 len = maxcount;
3491 v = 0;
6ff9897d 3492
1055414f 3493 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3494 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3495 WARN_ON_ONCE(!p);
3496 resp->rqstp->rq_vec[v].iov_base = p;
3497 resp->rqstp->rq_vec[v].iov_len = thislen;
3498 v++;
3499 len -= thislen;
3500
3501 while (len) {
6ff9897d 3502 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3503 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3504 WARN_ON_ONCE(!p);
3505 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3506 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3507 v++;
6ff9897d 3508 len -= thislen;
1da177e4
LT		 3509 }
3510 read->rd_vlen = v;
3511
ac503e4a 3512 len = maxcount;
dc97618d
BF		 3513 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3514 read->rd_vlen, &maxcount);
3515 if (nfserr)
1da177e4 3516 return nfserr;
b0420980 3517 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3518
ac503e4a
BC		 3519 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3520 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3521
dc97618d
BF		 3522 tmp = htonl(eof);
3523 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3524 tmp = htonl(maxcount);
3525 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3526
b0420980
BF		 3527 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3528 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3529 &zzz, pad);
1da177e4 3530 return 0;
dc97618d
BF		 3531
3532}
3533
3534static __be32
3535nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3536 struct nfsd4_read *read)
3537{
3538 unsigned long maxcount;
3539 struct xdr_stream *xdr = &resp->xdr;
3540 struct file *file = read->rd_filp;
3541 int starting_len = xdr->buf->len;
e749a462 3542 struct raparms *ra = NULL;
dc97618d 3543 __be32 *p;
dc97618d
BF		 3544
3545 if (nfserr)
96bcad50 3546 goto out;
dc97618d
BF		 3547
3548 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3549 if (!p) {
779fb0f3 3550 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
96bcad50
CH		 3551 nfserr = nfserr_resource;
3552 goto out;
dc97618d 3553 }
68e8bb03
CH		 3554 if (resp->xdr.buf->page_len &&
3555 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3556 WARN_ON_ONCE(1);
96bcad50
CH		 3557 nfserr = nfserr_resource;
3558 goto out;
dc97618d 3559 }
dc97618d
BF		 3560 xdr_commit_encode(xdr);
3561
3562 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3563 maxcount = min_t(unsigned long, maxcount,
3564 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3565 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3566
af90f707 3567 if (read->rd_tmp_file)
e749a462 3568 ra = nfsd_init_raparms(file);
dc97618d 3569
68e8bb03
CH		 3570 if (file->f_op->splice_read &&
3571 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3572 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3573 else
96bcad50 3574 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3575
e749a462
CH		 3576 if (ra)
3577 nfsd_put_raparams(file, ra);
dc97618d 3578
96bcad50 3579 if (nfserr)
dc97618d 3580 xdr_truncate_encode(xdr, starting_len);
96bcad50
CH		 3581
3582out:
3583 if (file)
3584 fput(file);
3585 return nfserr;
1da177e4
LT		 3586}
3587
b37ad28b
AV		 3588static __be32
3589nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3590{
3591 int maxcount;
476a7b1f
BF		 3592 __be32 wire_count;
3593 int zero = 0;
ddd1ea56 3594 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3595 int length_offset = xdr->buf->len;
bc749ca4 3596 __be32 *p;
1da177e4
LT		 3597
3598 if (nfserr)
3599 return nfserr;
2825a7f9
BF		 3600
3601 p = xdr_reserve_space(xdr, 4);
3602 if (!p)
3603 return nfserr_resource;
1da177e4 3604 maxcount = PAGE_SIZE;
d0a381dd 3605
476a7b1f
BF		 3606 p = xdr_reserve_space(xdr, maxcount);
3607 if (!p)
4e21ac4b 3608 return nfserr_resource;
1da177e4 3609 /*
fd4a0edf
MS		 3610 * XXX: By default, vfs_readlink() will truncate symlinks if they
3611 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3612 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3613 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3614 */
476a7b1f
BF		 3615 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3616 (char *)p, &maxcount);
1da177e4 3617 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3618 nfserr = nfserr_inval;
3619 if (nfserr) {
1fcea5b2 3620 xdr_truncate_encode(xdr, length_offset);
1da177e4 3621 return nfserr;
d3f627c8 3622 }
1da177e4 3623
476a7b1f
BF		 3624 wire_count = htonl(maxcount);
3625 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3626 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3627 if (maxcount & 3)
3628 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3629 &zero, 4 - (maxcount&3));
1da177e4
LT		 3630 return 0;
3631}
3632
b37ad28b
AV		 3633static __be32
3634nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3635{
3636 int maxcount;
561f0ed4 3637 int bytes_left;
1da177e4 3638 loff_t offset;
561f0ed4 3639 __be64 wire_offset;
ddd1ea56 3640 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3641 int starting_len = xdr->buf->len;
bc749ca4 3642 __be32 *p;
1da177e4
LT		 3643
3644 if (nfserr)
3645 return nfserr;
1da177e4 3646
d0a381dd
BF		 3647 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3648 if (!p)
3649 return nfserr_resource;
1da177e4
LT		 3650
3651 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3652 *p++ = cpu_to_be32(0);
3653 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3654 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3655 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3656
3657 /*
561f0ed4
BF		 3658 * Number of bytes left for directory entries allowing for the
3659 * final 8 bytes of the readdir and a following failed op:
3660 */
3661 bytes_left = xdr->buf->buflen - xdr->buf->len
3662 - COMPOUND_ERR_SLACK_SPACE - 8;
3663 if (bytes_left < 0) {
3664 nfserr = nfserr_resource;
3665 goto err_no_verf;
3666 }
3667 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3668 /*
3669 * Note the rfc defines rd_maxcount as the size of the
3670 * READDIR4resok structure, which includes the verifier above
3671 * and the 8 bytes encoded at the end of this function:
1da177e4 3672 */
561f0ed4
BF		 3673 if (maxcount < 16) {
3674 nfserr = nfserr_toosmall;
1da177e4
LT		 3675 goto err_no_verf;
3676 }
561f0ed4 3677 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3678
aee37764
BF		 3679 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3680 if (!readdir->rd_dircount)
3681 readdir->rd_dircount = INT_MAX;
3682
561f0ed4
BF		 3683 readdir->xdr = xdr;
3684 readdir->rd_maxcount = maxcount;
1da177e4 3685 readdir->common.err = 0;
561f0ed4 3686 readdir->cookie_offset = 0;
1da177e4
LT		 3687
3688 offset = readdir->rd_cookie;
3689 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3690 &offset,
3691 &readdir->common, nfsd4_encode_dirent);
3692 if (nfserr == nfs_ok &&
3693 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3694 xdr->buf->len == starting_len + 8) {
3695 /* nothing encoded; which limit did we hit?: */
3696 if (maxcount - 16 < bytes_left)
3697 /* It was the fault of rd_maxcount: */
3698 nfserr = nfserr_toosmall;
3699 else
3700 /* We ran out of buffer space: */
3701 nfserr = nfserr_resource;
3702 }
1da177e4
LT		 3703 if (nfserr)
3704 goto err_no_verf;
3705
561f0ed4
BF		 3706 if (readdir->cookie_offset) {
3707 wire_offset = cpu_to_be64(offset);
3708 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3709 &wire_offset, 8);
3710 }
1da177e4 3711
561f0ed4
BF		 3712 p = xdr_reserve_space(xdr, 8);
3713 if (!p) {
3714 WARN_ON_ONCE(1);
3715 goto err_no_verf;
3716 }
1da177e4
LT		 3717 *p++ = 0; /* no more entries */
3718 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3719
3720 return 0;
3721err_no_verf:
1fcea5b2 3722 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3723 return nfserr;
3724}
3725
695e12f8 3726static __be32
b37ad28b 3727nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3728{
d0a381dd 3729 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3730 __be32 *p;
1da177e4
LT		 3731
3732 if (!nfserr) {
d0a381dd
BF		 3733 p = xdr_reserve_space(xdr, 20);
3734 if (!p)
3735 return nfserr_resource;
d05d5744 3736 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3737 }
695e12f8 3738 return nfserr;
1da177e4
LT		 3739}
3740
695e12f8 3741static __be32
b37ad28b 3742nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3743{
d0a381dd 3744 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3745 __be32 *p;
1da177e4
LT		 3746
3747 if (!nfserr) {
d0a381dd
BF		 3748 p = xdr_reserve_space(xdr, 40);
3749 if (!p)
3750 return nfserr_resource;
d05d5744
BF		 3751 p = encode_cinfo(p, &rename->rn_sinfo);
3752 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3753 }
695e12f8 3754 return nfserr;
1da177e4
LT		 3755}
3756
695e12f8 3757static __be32
d0a381dd 3758nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3759 __be32 nfserr, struct svc_export *exp)
dcb488a3 3760{
676e4ebd 3761 u32 i, nflavs, supported;
4796f457
BF		 3762 struct exp_flavor_info *flavs;
3763 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3764 __be32 *p, *flavorsp;
3765 static bool report = true;
dcb488a3
AA		 3766
3767 if (nfserr)
3768 goto out;
d0a381dd 3769 nfserr = nfserr_resource;
4796f457
BF		 3770 if (exp->ex_nflavors) {
3771 flavs = exp->ex_flavors;
3772 nflavs = exp->ex_nflavors;
3773 } else { /* Handling of some defaults in absence of real secinfo: */
3774 flavs = def_flavs;
3775 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3776 nflavs = 2;
3777 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3778 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3779 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3780 nflavs = 1;
3781 flavs[0].pseudoflavor
3782 = svcauth_gss_flavor(exp->ex_client);
3783 } else {
3784 nflavs = 1;
3785 flavs[0].pseudoflavor
3786 = exp->ex_client->flavour->flavour;
3787 }
3788 }
3789
676e4ebd 3790 supported = 0;
d0a381dd
BF		 3791 p = xdr_reserve_space(xdr, 4);
3792 if (!p)
3793 goto out;
676e4ebd 3794 flavorsp = p++; /* to be backfilled later */
676e4ebd 3795
4796f457 3796 for (i = 0; i < nflavs; i++) {
676e4ebd 3797 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3798 struct rpcsec_gss_info info;
dcb488a3 3799
676e4ebd
CL		 3800 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3801 supported++;
d0a381dd
BF		 3802 p = xdr_reserve_space(xdr, 4 + 4 +
3803 XDR_LEN(info.oid.len) + 4 + 4);
3804 if (!p)
3805 goto out;
c373b0a4 3806 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3807 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3808 *p++ = cpu_to_be32(info.qop);
3809 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3810 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3811 supported++;
d0a381dd
BF		 3812 p = xdr_reserve_space(xdr, 4);
3813 if (!p)
3814 goto out;
c373b0a4 3815 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3816 } else {
3817 if (report)
3818 pr_warn("NFS: SECINFO: security flavor %u "
3819 "is not supported\n", pf);
dcb488a3
AA		 3820 }
3821 }
a77c806f 3822
676e4ebd
CL		 3823 if (nflavs != supported)
3824 report = false;
3825 *flavorsp = htonl(supported);
d0a381dd 3826 nfserr = 0;
dcb488a3
AA		 3827out:
3828 if (exp)
3829 exp_put(exp);
695e12f8 3830 return nfserr;
dcb488a3
AA		 3831}
3832
22b6dee8
MJ		 3833static __be32
3834nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3835 struct nfsd4_secinfo *secinfo)
3836{
d0a381dd
BF		 3837 struct xdr_stream *xdr = &resp->xdr;
3838
3839 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3840}
3841
3842static __be32
3843nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3844 struct nfsd4_secinfo_no_name *secinfo)
3845{
d0a381dd
BF		 3846 struct xdr_stream *xdr = &resp->xdr;
3847
3848 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3849}
3850
1da177e4
LT		 3851/*
3852 * The SETATTR encode routine is special -- it always encodes a bitmap,
3853 * regardless of the error status.
3854 */
695e12f8 3855static __be32
b37ad28b 3856nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3857{
d0a381dd 3858 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3859 __be32 *p;
1da177e4 3860
d0a381dd
BF		 3861 p = xdr_reserve_space(xdr, 16);
3862 if (!p)
3863 return nfserr_resource;
1da177e4 3864 if (nfserr) {
c373b0a4
BF		 3865 *p++ = cpu_to_be32(3);
3866 *p++ = cpu_to_be32(0);
3867 *p++ = cpu_to_be32(0);
3868 *p++ = cpu_to_be32(0);
1da177e4
LT		 3869 }
3870 else {
c373b0a4
BF		 3871 *p++ = cpu_to_be32(3);
3872 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3873 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3874 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3875 }
695e12f8 3876 return nfserr;
1da177e4
LT		 3877}
3878
695e12f8 3879static __be32
b37ad28b 3880nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3881{
d0a381dd 3882 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3883 __be32 *p;
1da177e4
LT		 3884
3885 if (!nfserr) {
d0a381dd
BF		 3886 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3887 if (!p)
3888 return nfserr_resource;
0c0c267b
BF		 3889 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3890 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3891 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3892 }
3893 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3894 p = xdr_reserve_space(xdr, 8);
3895 if (!p)
3896 return nfserr_resource;
c373b0a4
BF		 3897 *p++ = cpu_to_be32(0);
3898 *p++ = cpu_to_be32(0);
1da177e4 3899 }
695e12f8 3900 return nfserr;
1da177e4
LT		 3901}
3902
695e12f8 3903static __be32
b37ad28b 3904nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3905{
d0a381dd 3906 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3907 __be32 *p;
1da177e4
LT		 3908
3909 if (!nfserr) {
d0a381dd
BF		 3910 p = xdr_reserve_space(xdr, 16);
3911 if (!p)
3912 return nfserr_resource;
c373b0a4
BF		 3913 *p++ = cpu_to_be32(write->wr_bytes_written);
3914 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3915 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3916 NFS4_VERIFIER_SIZE);
1da177e4 3917 }
695e12f8 3918 return nfserr;
1da177e4
LT		 3919}
3920
2db134eb 3921static __be32
57b7b43b 3922nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3923 struct nfsd4_exchange_id *exid)
3924{
d0a381dd 3925 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3926 __be32 *p;
0733d213
AA		 3927 char *major_id;
3928 char *server_scope;
3929 int major_id_sz;
3930 int server_scope_sz;
ed941643 3931 int status = 0;
0733d213
AA		 3932 uint64_t minor_id = 0;
3933
3934 if (nfserr)
3935 return nfserr;
3936
3937 major_id = utsname()->nodename;
3938 major_id_sz = strlen(major_id);
3939 server_scope = utsname()->nodename;
3940 server_scope_sz = strlen(server_scope);
3941
d0a381dd 3942 p = xdr_reserve_space(xdr,
0733d213
AA		 3943 8 /* eir_clientid */ +
3944 4 /* eir_sequenceid */ +
3945 4 /* eir_flags */ +
a8bb84bc 3946 4 /* spr_how */);
d0a381dd
BF		 3947 if (!p)
3948 return nfserr_resource;
0733d213 3949
0c0c267b 3950 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3951 *p++ = cpu_to_be32(exid->seqid);
3952 *p++ = cpu_to_be32(exid->flags);
0733d213 3953
c373b0a4 3954 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3955
57266a6e
BF		 3956 switch (exid->spa_how) {
3957 case SP4_NONE:
3958 break;
3959 case SP4_MACH_CRED:
3960 /* spo_must_enforce bitmap: */
ed941643
AE		 3961 status = nfsd4_encode_bitmap(xdr,
3962 exid->spo_must_enforce[0],
3963 exid->spo_must_enforce[1],
3964 exid->spo_must_enforce[2]);
3965 if (status)
3966 goto out;
3967 /* spo_must_allow bitmap: */
3968 status = nfsd4_encode_bitmap(xdr,
3969 exid->spo_must_allow[0],
3970 exid->spo_must_allow[1],
3971 exid->spo_must_allow[2]);
3972 if (status)
3973 goto out;
57266a6e
BF		 3974 break;
3975 default:
3976 WARN_ON_ONCE(1);
3977 }
0733d213 3978
d0a381dd 3979 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3980 8 /* so_minor_id */ +
3981 4 /* so_major_id.len */ +
3982 (XDR_QUADLEN(major_id_sz) * 4) +
3983 4 /* eir_server_scope.len */ +
3984 (XDR_QUADLEN(server_scope_sz) * 4) +
3985 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3986 if (!p)
3987 return nfserr_resource;
a8bb84bc 3988
0733d213 3989 /* The server_owner struct */
b64c7f3b 3990 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3991 /* major id */
0c0c267b 3992 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3993
3994 /* Server scope */
0c0c267b 3995 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3996
3997 /* Implementation id */
c373b0a4 3998 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3999 return 0;
ed941643
AE		 4000out:
4001 return status;
2db134eb
AA		 4002}
4003
4004static __be32
57b7b43b 4005nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4006 struct nfsd4_create_session *sess)
4007{
d0a381dd 4008 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4009 __be32 *p;
ec6b5d7b
AA		 4010
4011 if (nfserr)
4012 return nfserr;
4013
d0a381dd
BF		 4014 p = xdr_reserve_space(xdr, 24);
4015 if (!p)
4016 return nfserr_resource;
0c0c267b
BF		 4017 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4018 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4019 *p++ = cpu_to_be32(sess->seqid);
4020 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4021
d0a381dd
BF		 4022 p = xdr_reserve_space(xdr, 28);
4023 if (!p)
4024 return nfserr_resource;
c373b0a4
BF		 4025 *p++ = cpu_to_be32(0); /* headerpadsz */
4026 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4027 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4028 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4029 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4030 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4031 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4032
4033 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4034 p = xdr_reserve_space(xdr, 4);
4035 if (!p)
4036 return nfserr_resource;
c373b0a4 4037 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4038 }
4039
d0a381dd
BF		 4040 p = xdr_reserve_space(xdr, 28);
4041 if (!p)
4042 return nfserr_resource;
c373b0a4
BF		 4043 *p++ = cpu_to_be32(0); /* headerpadsz */
4044 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4045 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4046 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4047 *p++ = cpu_to_be32(sess->back_channel.maxops);
4048 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4049 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4050
4051 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4052 p = xdr_reserve_space(xdr, 4);
4053 if (!p)
4054 return nfserr_resource;
c373b0a4 4055 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4056 }
4057 return 0;
2db134eb
AA		 4058}
4059
c47d832b 4060static __be32
57b7b43b 4061nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4062 struct nfsd4_sequence *seq)
4063{
d0a381dd 4064 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4065 __be32 *p;
b85d4c01
BH		 4066
4067 if (nfserr)
4068 return nfserr;
4069
d0a381dd
BF		 4070 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4071 if (!p)
4072 return nfserr_resource;
0c0c267b
BF		 4073 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4074 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4075 *p++ = cpu_to_be32(seq->seqid);
4076 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4077 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4078 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4079 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4080 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4081
f5236013 4082 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4083 return 0;
2db134eb
AA		 4084}
4085
2355c596 4086static __be32
57b7b43b 4087nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4088 struct nfsd4_test_stateid *test_stateid)
4089{
d0a381dd 4090 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4091 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4092 __be32 *p;
17456804 4093
a11fcce1
BF		 4094 if (nfserr)
4095 return nfserr;
4096
d0a381dd
BF		 4097 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4098 if (!p)
4099 return nfserr_resource;
17456804 4100 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4101
03cfb420 4102 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4103 *p++ = stateid->ts_id_status;
17456804 4104 }
17456804
BS		 4105
4106 return nfserr;
4107}
4108
9cf514cc
CH		 4109#ifdef CONFIG_NFSD_PNFS
4110static __be32
4111nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4112 struct nfsd4_getdeviceinfo *gdev)
4113{
4114 struct xdr_stream *xdr = &resp->xdr;
4115 const struct nfsd4_layout_ops *ops =
4116 nfsd4_layout_ops[gdev->gd_layout_type];
4117 u32 starting_len = xdr->buf->len, needed_len;
4118 __be32 *p;
4119
bec782b4 4120 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr));
9cf514cc
CH		 4121 if (nfserr)
4122 goto out;
4123
4124 nfserr = nfserr_resource;
4125 p = xdr_reserve_space(xdr, 4);
4126 if (!p)
4127 goto out;
4128
4129 *p++ = cpu_to_be32(gdev->gd_layout_type);
4130
4131 /* If maxcount is 0 then just update notifications */
4132 if (gdev->gd_maxcount != 0) {
4133 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4134 if (nfserr) {
4135 /*
4136 * We don't bother to burden the layout drivers with
4137 * enforcing gd_maxcount, just tell the client to
4138 * come back with a bigger buffer if it's not enough.
4139 */
4140 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4141 goto toosmall;
4142 goto out;
4143 }
4144 }
4145
4146 nfserr = nfserr_resource;
4147 if (gdev->gd_notify_types) {
4148 p = xdr_reserve_space(xdr, 4 + 4);
4149 if (!p)
4150 goto out;
4151 *p++ = cpu_to_be32(1); /* bitmap length */
4152 *p++ = cpu_to_be32(gdev->gd_notify_types);
4153 } else {
4154 p = xdr_reserve_space(xdr, 4);
4155 if (!p)
4156 goto out;
4157 *p++ = 0;
4158 }
4159
4160 nfserr = 0;
4161out:
4162 kfree(gdev->gd_device);
4163 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4164 return nfserr;
4165
4166toosmall:
4167 dprintk("%s: maxcount too small\n", __func__);
4168 needed_len = xdr->buf->len + 4 /* notifications */;
4169 xdr_truncate_encode(xdr, starting_len);
4170 p = xdr_reserve_space(xdr, 4);
4171 if (!p) {
4172 nfserr = nfserr_resource;
4173 } else {
4174 *p++ = cpu_to_be32(needed_len);
4175 nfserr = nfserr_toosmall;
4176 }
4177 goto out;
4178}
4179
4180static __be32
4181nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4182 struct nfsd4_layoutget *lgp)
4183{
4184 struct xdr_stream *xdr = &resp->xdr;
4185 const struct nfsd4_layout_ops *ops =
4186 nfsd4_layout_ops[lgp->lg_layout_type];
4187 __be32 *p;
4188
4189 dprintk("%s: err %d\n", __func__, nfserr);
4190 if (nfserr)
4191 goto out;
4192
4193 nfserr = nfserr_resource;
4194 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4195 if (!p)
4196 goto out;
4197
4198 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4199 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4200 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4201 sizeof(stateid_opaque_t));
4202
4203 *p++ = cpu_to_be32(1); /* we always return a single layout */
4204 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4205 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4206 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4207 *p++ = cpu_to_be32(lgp->lg_layout_type);
4208
4209 nfserr = ops->encode_layoutget(xdr, lgp);
4210out:
4211 kfree(lgp->lg_content);
4212 return nfserr;
4213}
4214
4215static __be32
4216nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4217 struct nfsd4_layoutcommit *lcp)
4218{
4219 struct xdr_stream *xdr = &resp->xdr;
4220 __be32 *p;
4221
4222 if (nfserr)
4223 return nfserr;
4224
4225 p = xdr_reserve_space(xdr, 4);
4226 if (!p)
4227 return nfserr_resource;
4228 *p++ = cpu_to_be32(lcp->lc_size_chg);
4229 if (lcp->lc_size_chg) {
4230 p = xdr_reserve_space(xdr, 8);
4231 if (!p)
4232 return nfserr_resource;
4233 p = xdr_encode_hyper(p, lcp->lc_newsize);
4234 }
4235
4236 return nfs_ok;
4237}
4238
4239static __be32
4240nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4241 struct nfsd4_layoutreturn *lrp)
4242{
4243 struct xdr_stream *xdr = &resp->xdr;
4244 __be32 *p;
4245
4246 if (nfserr)
4247 return nfserr;
4248
4249 p = xdr_reserve_space(xdr, 4);
4250 if (!p)
4251 return nfserr_resource;
4252 *p++ = cpu_to_be32(lrp->lrs_present);
4253 if (lrp->lrs_present)
376675da 4254 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
9cf514cc
CH		 4255 return nfs_ok;
4256}
4257#endif /* CONFIG_NFSD_PNFS */
4258
29ae7f9d
AS		 4259static __be32
4260nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4261{
4262 __be32 *p;
4263
4264 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4265 if (!p)
4266 return nfserr_resource;
4267
4268 *p++ = cpu_to_be32(0);
4269 p = xdr_encode_hyper(p, write->wr_bytes_written);
4270 *p++ = cpu_to_be32(write->wr_stable_how);
4271 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4272 NFS4_VERIFIER_SIZE);
4273 return nfs_ok;
4274}
4275
4276static __be32
4277nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4278 struct nfsd4_copy *copy)
4279{
4280 __be32 *p;
4281
4282 if (!nfserr) {
4283 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4284 if (nfserr)
4285 return nfserr;
4286
4287 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4288 *p++ = cpu_to_be32(copy->cp_consecutive);
4289 *p++ = cpu_to_be32(copy->cp_synchronous);
4290 }
4291 return nfserr;
4292}
4293
24bab491
AS		 4294static __be32
4295nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4296 struct nfsd4_seek *seek)
4297{
4298 __be32 *p;
4299
4300 if (nfserr)
4301 return nfserr;
4302
4303 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4304 *p++ = cpu_to_be32(seek->seek_eof);
4305 p = xdr_encode_hyper(p, seek->seek_pos);
4306
4307 return nfserr;
4308}
4309
695e12f8
BH		 4310static __be32
4311nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4312{
4313 return nfserr;
4314}
4315
4316typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4317
2db134eb
AA		 4318/*
4319 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4320 * since we don't need to filter out obsolete ops as this is
4321 * done in the decoding phase.
4322 */
695e12f8 4323static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4324 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4325 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4326 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4327 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4328 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4329 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4331 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4332 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4333 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4334 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4335 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4336 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4338 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4339 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4340 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4341 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4342 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4343 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4344 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4345 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4346 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4347 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4348 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4349 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4350 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4351 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4352 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4353 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4354 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4355 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4356 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4357 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4358 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4359 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4360 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4361
4362 /* NFSv4.1 operations */
4363 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4364 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4365 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4366 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4367 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4368 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4369 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4370#ifdef CONFIG_NFSD_PNFS
4371 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4372 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4373 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4374 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4375 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4376#else
2db134eb
AA		 4377 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4378 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4379 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4380 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4381 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4382#endif
22b6dee8 4383 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4384 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4385 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4386 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4387 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4389 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4390
4391 /* NFSv4.2 operations */
4392 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4393 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4394 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4395 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4396 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4397 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4398 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4399 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4400 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4401 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4402 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4403 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4404 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4405};
4406
496c262c 4407/*
a8095f7e
BF		 4408 * Calculate whether we still have space to encode repsize bytes.
4409 * There are two considerations:
4410 * - For NFS versions >=4.1, the size of the reply must stay within
4411 * session limits
4412 * - For all NFS versions, we must stay within limited preallocated
4413 * buffer space.
496c262c 4414 *
a8095f7e
BF		 4415 * This is called before the operation is processed, so can only provide
4416 * an upper estimate. For some nonidempotent operations (such as
4417 * getattr), it's not necessarily a problem if that estimate is wrong,
4418 * as we can fail it after processing without significant side effects.
496c262c 4419 */
a8095f7e 4420__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4421{
67492c99 4422 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4423 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4424
47ee5298
BF		 4425 if (buf->len + respsize <= buf->buflen)
4426 return nfs_ok;
4427 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4428 return nfserr_resource;
47ee5298
BF		 4429 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4430 WARN_ON_ONCE(1);
4431 return nfserr_rep_too_big_to_cache;
ea8d7720 4432 }
47ee5298 4433 return nfserr_rep_too_big;
496c262c
AA		 4434}
4435
1da177e4
LT		 4436void
4437nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4438{
082d4bd7 4439 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4440 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4441 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 4442 int post_err_offset;
07d1f802 4443 nfsd4_enc encoder;
bc749ca4 4444 __be32 *p;
1da177e4 4445
d0a381dd
BF		 4446 p = xdr_reserve_space(xdr, 8);
4447 if (!p) {
4448 WARN_ON_ONCE(1);
4449 return;
4450 }
c373b0a4 4451 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4452 post_err_offset = xdr->buf->len;
1da177e4 4453
695e12f8
BH		 4454 if (op->opnum == OP_ILLEGAL)
4455 goto status;
4456 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4457 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4458 encoder = nfsd4_enc_ops[op->opnum];
4459 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 4460 xdr_commit_encode(xdr);
4461
067e1ace 4462 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4463 if (!op->status) {
4464 int space_needed = 0;
4465 if (!nfsd4_last_compound_op(rqstp))
4466 space_needed = COMPOUND_ERR_SLACK_SPACE;
4467 op->status = nfsd4_check_resp_size(resp, space_needed);
4468 }
c8f13d97
BF		 4469 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4470 struct nfsd4_slot *slot = resp->cstate.slot;
4471
4472 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4473 op->status = nfserr_rep_too_big_to_cache;
4474 else
4475 op->status = nfserr_rep_too_big;
4476 }
07d1f802
BF		 4477 if (op->status == nfserr_resource ||
4478 op->status == nfserr_rep_too_big ||
4479 op->status == nfserr_rep_too_big_to_cache) {
4480 /*
4481 * The operation may have already been encoded or
4482 * partially encoded. No op returns anything additional
4483 * in the case of one of these three errors, so we can
4484 * just truncate back to after the status. But it's a
4485 * bug if we had to do this on a non-idempotent op:
4486 */
4487 warn_on_nonidempotent_op(op);
082d4bd7 4488 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4489 }
9411b1d4 4490 if (so) {
082d4bd7
BF		 4491 int len = xdr->buf->len - post_err_offset;
4492
9411b1d4 4493 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4494 so->so_replay.rp_buflen = len;
4495 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4496 so->so_replay.rp_buf, len);
9411b1d4 4497 }
695e12f8 4498status:
082d4bd7
BF		 4499 /* Note that op->status is already in network byte order: */
4500 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4501}
4502
4503/*
4504 * Encode the reply stored in the stateowner reply cache
4505 *
4506 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4507 * previously sent already encoded operation.
1da177e4
LT		 4508 */
4509void
d0a381dd 4510nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4511{
bc749ca4 4512 __be32 *p;
1da177e4
LT		 4513 struct nfs4_replay *rp = op->replay;
4514
4515 BUG_ON(!rp);
4516
d0a381dd
BF		 4517 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4518 if (!p) {
4519 WARN_ON_ONCE(1);
4520 return;
4521 }
c373b0a4 4522 *p++ = cpu_to_be32(op->opnum);
1da177e4 4523 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4524
0c0c267b 4525 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4526}
4527
1da177e4 4528int
2ebbc012 4529nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 4530{
4531 return xdr_ressize_check(rqstp, p);
4532}
4533
3e98abff 4534int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 4535{
3e98abff
BF		 4536 struct svc_rqst *rqstp = rq;
4537 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4538
1da177e4
LT		 4539 if (args->ops != args->iops) {
4540 kfree(args->ops);
4541 args->ops = args->iops;
4542 }
f99d49ad
JJ		 4543 kfree(args->tmpp);
4544 args->tmpp = NULL;
1da177e4 4545 while (args->to_free) {
d5e23383 4546 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4547 args->to_free = tb->next;
1da177e4
LT		 4548 kfree(tb);
4549 }
3e98abff 4550 return 1;
1da177e4
LT		 4551}
4552
4553int
2ebbc012 4554nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 4555{
e874f9f8
JL		 4556 if (rqstp->rq_arg.head[0].iov_len % 4) {
4557 /* client is nuts */
4558 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4559 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4560 return 0;
4561 }
1da177e4
LT		 4562 args->p = p;
4563 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4564 args->pagelist = rqstp->rq_arg.pages;
4565 args->pagelen = rqstp->rq_arg.page_len;
4566 args->tmpp = NULL;
4567 args->to_free = NULL;
4568 args->ops = args->iops;
4569 args->rqstp = rqstp;
4570
3e98abff 4571 return !nfsd4_decode_compound(args);
1da177e4
LT		 4572}
4573
4574int
2ebbc012 4575nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4576{
4577 /*
4578 * All that remains is to write the tag and operation count...
4579 */
6ac90391
BF		 4580 struct xdr_buf *buf = resp->xdr.buf;
4581
4582 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4583 buf->tail[0].iov_len);
dd97fdde 4584
2825a7f9
BF		 4585 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4586
1da177e4
LT		 4587 p = resp->tagp;
4588 *p++ = htonl(resp->taglen);
4589 memcpy(p, resp->tag, resp->taglen);
4590 p += XDR_QUADLEN(resp->taglen);
4591 *p++ = htonl(resp->opcnt);
4592
b607664e 4593 nfsd4_sequence_done(resp);
1da177e4
LT		 4594 return 1;
4595}
4596
4597/*
4598 * Local variables:
4599 * c-basic-offset: 8
4600 * End:
4601 */
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