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nfsd: encoders mustn't use unitialized values in error cases
[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
5cf23dbb 61const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 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++);
54bbb7d2 1253 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 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 1943 /*
7323f0d2
KM		 1944 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1945 * (Special case because it will just skip encoding this
1946 * if it runs out of xdr buffer space, and it is the only
1947 * operation that behaves this way.)
f7b43d0c 1948 */
7323f0d2 1949 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 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
b8800921
N		 1969static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1970 struct svc_export *exp)
c654b8a9 1971{
b8800921
N		 1972 if (exp->ex_flags & NFSEXP_V4ROOT) {
1973 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1974 *p++ = 0;
1975 } else if (IS_I_VERSION(inode)) {
d05d5744 1976 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1977 } else {
d05d5744
BF		 1978 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1979 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1980 }
d05d5744 1981 return p;
c654b8a9
BF		 1982}
1983
d05d5744 1984static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1985{
d05d5744 1986 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1987 if (c->change_supported) {
d05d5744
BF		 1988 p = xdr_encode_hyper(p, c->before_change);
1989 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1990 } else {
d05d5744
BF		 1991 *p++ = cpu_to_be32(c->before_ctime_sec);
1992 *p++ = cpu_to_be32(c->before_ctime_nsec);
1993 *p++ = cpu_to_be32(c->after_ctime_sec);
1994 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1995 }
d05d5744 1996 return p;
c654b8a9 1997}
1da177e4 1998
81c3f413 1999/* Encode as an array of strings the string given with components
e7a0444a 2000 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2001 */
ddd1ea56
BF		 2002static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2003 char *components, char esc_enter,
2004 char esc_exit)
81c3f413 2005{
ddd1ea56 2006 __be32 *p;
082d4bd7
BF		 2007 __be32 pathlen;
2008 int pathlen_offset;
81c3f413 2009 int strlen, count=0;
e7a0444a 2010 char *str, *end, *next;
81c3f413
BF		 2011
2012 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2013
2014 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2015 p = xdr_reserve_space(xdr, 4);
2016 if (!p)
81c3f413 2017 return nfserr_resource;
082d4bd7
BF		 2018 p++; /* We will fill this in with @count later */
2019
81c3f413
BF		 2020 end = str = components;
2021 while (*end) {
e7a0444a
WAA		 2022 bool found_esc = false;
2023
2024 /* try to parse as esc_start, ..., esc_end, sep */
2025 if (*str == esc_enter) {
2026 for (; *end && (*end != esc_exit); end++)
2027 /* find esc_exit or end of string */;
2028 next = end + 1;
2029 if (*end && (!*next || *next == sep)) {
2030 str++;
2031 found_esc = true;
2032 }
2033 }
2034
2035 if (!found_esc)
2036 for (; *end && (*end != sep); end++)
2037 /* find sep or end of string */;
2038
81c3f413
BF		 2039 strlen = end - str;
2040 if (strlen) {
ddd1ea56
BF		 2041 p = xdr_reserve_space(xdr, strlen + 4);
2042 if (!p)
81c3f413 2043 return nfserr_resource;
0c0c267b 2044 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2045 count++;
2046 }
2047 else
2048 end++;
5a64e569
BC		 2049 if (found_esc)
2050 end = next;
2051
81c3f413
BF		 2052 str = end;
2053 }
bf7491f1 2054 pathlen = htonl(count);
082d4bd7 2055 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2056 return 0;
2057}
2058
e7a0444a
WAA		 2059/* Encode as an array of strings the string given with components
2060 * separated @sep.
2061 */
ddd1ea56
BF		 2062static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2063 char *components)
e7a0444a 2064{
ddd1ea56 2065 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2066}
2067
81c3f413
BF		 2068/*
2069 * encode a location element of a fs_locations structure
2070 */
ddd1ea56
BF		 2071static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2072 struct nfsd4_fs_location *location)
81c3f413 2073{
b37ad28b 2074 __be32 status;
81c3f413 2075
ddd1ea56 2076 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2077 '[', ']');
81c3f413
BF		 2078 if (status)
2079 return status;
ddd1ea56 2080 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2081 if (status)
2082 return status;
81c3f413
BF		 2083 return 0;
2084}
2085
2086/*
ed748aac 2087 * Encode a path in RFC3530 'pathname4' format
81c3f413 2088 */
ddd1ea56
BF		 2089static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2090 const struct path *root,
2091 const struct path *path)
81c3f413 2092{
301f0268 2093 struct path cur = *path;
ddd1ea56 2094 __be32 *p;
ed748aac
TM		 2095 struct dentry **components = NULL;
2096 unsigned int ncomponents = 0;
2097 __be32 err = nfserr_jukebox;
81c3f413 2098
ed748aac 2099 dprintk("nfsd4_encode_components(");
81c3f413 2100
ed748aac
TM		 2101 path_get(&cur);
2102 /* First walk the path up to the nfsd root, and store the
2103 * dentries/path components in an array.
2104 */
2105 for (;;) {
b77a4b2e 2106 if (path_equal(&cur, root))
ed748aac
TM		 2107 break;
2108 if (cur.dentry == cur.mnt->mnt_root) {
2109 if (follow_up(&cur))
2110 continue;
2111 goto out_free;
2112 }
2113 if ((ncomponents & 15) == 0) {
2114 struct dentry **new;
2115 new = krealloc(components,
2116 sizeof(*new) * (ncomponents + 16),
2117 GFP_KERNEL);
2118 if (!new)
2119 goto out_free;
2120 components = new;
2121 }
2122 components[ncomponents++] = cur.dentry;
2123 cur.dentry = dget_parent(cur.dentry);
2124 }
ddd1ea56
BF		 2125 err = nfserr_resource;
2126 p = xdr_reserve_space(xdr, 4);
2127 if (!p)
ed748aac 2128 goto out_free;
c373b0a4 2129 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2130
2131 while (ncomponents) {
2132 struct dentry *dentry = components[ncomponents - 1];
301f0268 2133 unsigned int len;
ed748aac 2134
301f0268
AV		 2135 spin_lock(&dentry->d_lock);
2136 len = dentry->d_name.len;
ddd1ea56
BF		 2137 p = xdr_reserve_space(xdr, len + 4);
2138 if (!p) {
301f0268 2139 spin_unlock(&dentry->d_lock);
ed748aac 2140 goto out_free;
301f0268 2141 }
0c0c267b 2142 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2143 dprintk("/%pd", dentry);
301f0268 2144 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2145 dput(dentry);
2146 ncomponents--;
81c3f413 2147 }
ed748aac 2148
ed748aac
TM		 2149 err = 0;
2150out_free:
2151 dprintk(")\n");
2152 while (ncomponents)
2153 dput(components[--ncomponents]);
2154 kfree(components);
2155 path_put(&cur);
2156 return err;
2157}
2158
ddd1ea56
BF		 2159static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2160 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2161{
2162 struct svc_export *exp_ps;
2163 __be32 res;
2164
2165 exp_ps = rqst_find_fsidzero_export(rqstp);
2166 if (IS_ERR(exp_ps))
2167 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2168 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2169 exp_put(exp_ps);
2170 return res;
81c3f413
BF		 2171}
2172
2173/*
2174 * encode a fs_locations structure
2175 */
ddd1ea56
BF		 2176static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2177 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2178{
b37ad28b 2179 __be32 status;
cc45f017 2180 int i;
ddd1ea56 2181 __be32 *p;
81c3f413 2182 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2183
ddd1ea56 2184 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2185 if (status)
2186 return status;
ddd1ea56
BF		 2187 p = xdr_reserve_space(xdr, 4);
2188 if (!p)
81c3f413 2189 return nfserr_resource;
c373b0a4 2190 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2191 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2192 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2193 if (status)
2194 return status;
2195 }
81c3f413
BF		 2196 return 0;
2197}
1da177e4 2198
3d2544b1
BF		 2199static u32 nfs4_file_type(umode_t mode)
2200{
2201 switch (mode & S_IFMT) {
2202 case S_IFIFO: return NF4FIFO;
2203 case S_IFCHR: return NF4CHR;
2204 case S_IFDIR: return NF4DIR;
2205 case S_IFBLK: return NF4BLK;
2206 case S_IFLNK: return NF4LNK;
2207 case S_IFREG: return NF4REG;
2208 case S_IFSOCK: return NF4SOCK;
2209 default: return NF4BAD;
2210 };
2211}
1da177e4 2212
b37ad28b 2213static inline __be32
ddd1ea56
BF		 2214nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2215 struct nfs4_ace *ace)
1da177e4 2216{
3554116d 2217 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2218 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2219 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2220 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2221 else
ddd1ea56 2222 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2223}
2224
6896f15a 2225static inline __be32
8a4c3926 2226nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2227{
8a4c3926
JL		 2228 __be32 *p;
2229 unsigned long i = hweight_long(layout_types);
6896f15a 2230
8a4c3926
JL		 2231 p = xdr_reserve_space(xdr, 4 + 4 * i);
2232 if (!p)
2233 return nfserr_resource;
2234
2235 *p++ = cpu_to_be32(i);
2236
2237 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2238 if (layout_types & (1 << i))
2239 *p++ = cpu_to_be32(i);
6896f15a
KM		 2240
2241 return 0;
2242}
2243
42ca0993
BF		 2244#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2245 FATTR4_WORD0_RDATTR_ERROR)
2246#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2247#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2248
18032ca0
DQ		 2249#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2250static inline __be32
ddd1ea56
BF		 2251nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2252 void *context, int len)
18032ca0 2253{
ddd1ea56 2254 __be32 *p;
18032ca0 2255
ddd1ea56
BF		 2256 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2257 if (!p)
18032ca0
DQ		 2258 return nfserr_resource;
2259
2260 /*
2261 * For now we use a 0 here to indicate the null translation; in
2262 * the future we may place a call to translation code here.
2263 */
c373b0a4
BF		 2264 *p++ = cpu_to_be32(0); /* lfs */
2265 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2266 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2267 return 0;
2268}
2269#else
2270static inline __be32
ddd1ea56
BF		 2271nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2272 void *context, int len)
18032ca0
DQ		 2273{ return 0; }
2274#endif
2275
c2227a39 2276static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2277{
2278 /* As per referral draft: */
2279 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2280 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2281 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2282 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2283 *rdattr_err = NFSERR_MOVED;
2284 else
2285 return nfserr_moved;
2286 }
2287 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2288 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2289 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2290 return 0;
2291}
1da177e4 2292
ae7095a7
BF		 2293
2294static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2295{
2296 struct path path = exp->ex_path;
2297 int err;
2298
2299 path_get(&path);
2300 while (follow_up(&path)) {
2301 if (path.dentry != path.mnt->mnt_root)
2302 break;
2303 }
a528d35e 2304 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2305 path_put(&path);
2306 return err;
2307}
2308
75976de6
KM		 2309static __be32
2310nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2311{
2312 __be32 *p;
2313
2314 if (bmval2) {
2315 p = xdr_reserve_space(xdr, 16);
2316 if (!p)
2317 goto out_resource;
2318 *p++ = cpu_to_be32(3);
2319 *p++ = cpu_to_be32(bmval0);
2320 *p++ = cpu_to_be32(bmval1);
2321 *p++ = cpu_to_be32(bmval2);
2322 } else if (bmval1) {
2323 p = xdr_reserve_space(xdr, 12);
2324 if (!p)
2325 goto out_resource;
2326 *p++ = cpu_to_be32(2);
2327 *p++ = cpu_to_be32(bmval0);
2328 *p++ = cpu_to_be32(bmval1);
2329 } else {
2330 p = xdr_reserve_space(xdr, 8);
2331 if (!p)
2332 goto out_resource;
2333 *p++ = cpu_to_be32(1);
2334 *p++ = cpu_to_be32(bmval0);
2335 }
2336
2337 return 0;
2338out_resource:
2339 return nfserr_resource;
2340}
2341
1da177e4
LT		 2342/*
2343 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2344 * ourselves.
1da177e4 2345 */
da2ebce6 2346static __be32
d5184658
BF		 2347nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2348 struct svc_export *exp,
2349 struct dentry *dentry, u32 *bmval,
406a7ea9 2350 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2351{
2352 u32 bmval0 = bmval[0];
2353 u32 bmval1 = bmval[1];
7e705706 2354 u32 bmval2 = bmval[2];
1da177e4 2355 struct kstat stat;
d50e6136 2356 struct svc_fh *tempfh = NULL;
1da177e4 2357 struct kstatfs statfs;
ddd1ea56 2358 __be32 *p;
1fcea5b2 2359 int starting_len = xdr->buf->len;
082d4bd7
BF		 2360 int attrlen_offset;
2361 __be32 attrlen;
1da177e4
LT		 2362 u32 dummy;
2363 u64 dummy64;
42ca0993 2364 u32 rdattr_err = 0;
b37ad28b 2365 __be32 status;
b8dd7b9a 2366 int err;
1da177e4 2367 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2368 void *context = NULL;
2369 int contextlen;
2370 bool contextsupport = false;
7e705706
AA		 2371 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2372 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2373 struct path path = {
2374 .mnt = exp->ex_path.mnt,
2375 .dentry = dentry,
2376 };
3d733711 2377 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2378
2379 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2380 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2381
42ca0993 2382 if (exp->ex_fslocs.migrated) {
c2227a39 2383 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2384 if (status)
2385 goto out;
2386 }
2387
a528d35e 2388 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2389 if (err)
1da177e4 2390 goto out_nfserr;
12337901
CH		 2391 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2392 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2393 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2394 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2395 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2396 if (err)
1da177e4
LT		 2397 goto out_nfserr;
2398 }
2399 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2400 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2401 status = nfserr_jukebox;
2402 if (!tempfh)
2403 goto out;
2404 fh_init(tempfh, NFS4_FHSIZE);
2405 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2406 if (status)
2407 goto out;
d50e6136 2408 fhp = tempfh;
1da177e4 2409 }
0c9d65e7 2410 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2411 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2412 if (err == -EOPNOTSUPP)
2413 bmval0 &= ~FATTR4_WORD0_ACL;
2414 else if (err == -EINVAL) {
2415 status = nfserr_attrnotsupp;
2416 goto out;
2417 } else if (err != 0)
2418 goto out_nfserr;
1da177e4 2419 }
1da177e4 2420
18032ca0 2421#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2422 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2423 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2424 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2425 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2426 &context, &contextlen);
32ddd944
BF		 2427 else
2428 err = -EOPNOTSUPP;
18032ca0
DQ		 2429 contextsupport = (err == 0);
2430 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2431 if (err == -EOPNOTSUPP)
2432 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2433 else if (err)
2434 goto out_nfserr;
2435 }
2436 }
2437#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2438
75976de6
KM		 2439 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2440 if (status)
2441 goto out;
082d4bd7
BF		 2442
2443 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2444 p = xdr_reserve_space(xdr, 4);
2445 if (!p)
2446 goto out_resource;
082d4bd7 2447 p++; /* to be backfilled later */
1da177e4
LT		 2448
2449 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2450 u32 supp[3];
2451
2452 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2453
0c9d65e7 2454 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2455 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2456 if (!contextsupport)
916d2d84
BF		 2457 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2458 if (!supp[2]) {
ddd1ea56
BF		 2459 p = xdr_reserve_space(xdr, 12);
2460 if (!p)
2b44f1ba 2461 goto out_resource;
c373b0a4 2462 *p++ = cpu_to_be32(2);
916d2d84
BF		 2463 *p++ = cpu_to_be32(supp[0]);
2464 *p++ = cpu_to_be32(supp[1]);
7e705706 2465 } else {
ddd1ea56
BF		 2466 p = xdr_reserve_space(xdr, 16);
2467 if (!p)
2b44f1ba 2468 goto out_resource;
c373b0a4 2469 *p++ = cpu_to_be32(3);
916d2d84
BF		 2470 *p++ = cpu_to_be32(supp[0]);
2471 *p++ = cpu_to_be32(supp[1]);
2472 *p++ = cpu_to_be32(supp[2]);
7e705706 2473 }
1da177e4
LT		 2474 }
2475 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2476 p = xdr_reserve_space(xdr, 4);
2477 if (!p)
1da177e4 2478 goto out_resource;
3d2544b1 2479 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2480 if (dummy == NF4BAD) {
2481 status = nfserr_serverfault;
2482 goto out;
2483 }
c373b0a4 2484 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2485 }
2486 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2487 p = xdr_reserve_space(xdr, 4);
2488 if (!p)
1da177e4 2489 goto out_resource;
49640001 2490 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2491 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2492 else
c373b0a4
BF		 2493 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2494 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2495 }
2496 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2497 p = xdr_reserve_space(xdr, 8);
2498 if (!p)
1da177e4 2499 goto out_resource;
b8800921 2500 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2501 }
2502 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2503 p = xdr_reserve_space(xdr, 8);
2504 if (!p)
1da177e4 2505 goto out_resource;
b64c7f3b 2506 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2507 }
2508 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2509 p = xdr_reserve_space(xdr, 4);
2510 if (!p)
1da177e4 2511 goto out_resource;
c373b0a4 2512 *p++ = cpu_to_be32(1);
1da177e4
LT		 2513 }
2514 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2515 p = xdr_reserve_space(xdr, 4);
2516 if (!p)
1da177e4 2517 goto out_resource;
c373b0a4 2518 *p++ = cpu_to_be32(1);
1da177e4
LT		 2519 }
2520 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2521 p = xdr_reserve_space(xdr, 4);
2522 if (!p)
1da177e4 2523 goto out_resource;
c373b0a4 2524 *p++ = cpu_to_be32(0);
1da177e4
LT		 2525 }
2526 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2527 p = xdr_reserve_space(xdr, 16);
2528 if (!p)
1da177e4 2529 goto out_resource;
42ca0993 2530 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2531 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2532 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2533 } else switch(fsid_source(fhp)) {
2534 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2535 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2536 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2537 break;
2538 case FSIDSOURCE_DEV:
c373b0a4
BF		 2539 *p++ = cpu_to_be32(0);
2540 *p++ = cpu_to_be32(MAJOR(stat.dev));
2541 *p++ = cpu_to_be32(0);
2542 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2543 break;
2544 case FSIDSOURCE_UUID:
94eb3689
KM		 2545 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2546 EX_UUID_LEN);
af6a4e28 2547 break;
1da177e4
LT		 2548 }
2549 }
2550 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2551 p = xdr_reserve_space(xdr, 4);
2552 if (!p)
1da177e4 2553 goto out_resource;
c373b0a4 2554 *p++ = cpu_to_be32(0);
1da177e4
LT		 2555 }
2556 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2557 p = xdr_reserve_space(xdr, 4);
2558 if (!p)
1da177e4 2559 goto out_resource;
c373b0a4 2560 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2561 }
2562 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2563 p = xdr_reserve_space(xdr, 4);
2564 if (!p)
1da177e4 2565 goto out_resource;
c373b0a4 2566 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2567 }
2568 if (bmval0 & FATTR4_WORD0_ACL) {
2569 struct nfs4_ace *ace;
1da177e4
LT		 2570
2571 if (acl == NULL) {
ddd1ea56
BF		 2572 p = xdr_reserve_space(xdr, 4);
2573 if (!p)
1da177e4
LT		 2574 goto out_resource;
2575
c373b0a4 2576 *p++ = cpu_to_be32(0);
1da177e4
LT		 2577 goto out_acl;
2578 }
ddd1ea56
BF		 2579 p = xdr_reserve_space(xdr, 4);
2580 if (!p)
1da177e4 2581 goto out_resource;
c373b0a4 2582 *p++ = cpu_to_be32(acl->naces);
1da177e4 2583
28e05dd8 2584 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2585 p = xdr_reserve_space(xdr, 4*3);
2586 if (!p)
1da177e4 2587 goto out_resource;
c373b0a4
BF		 2588 *p++ = cpu_to_be32(ace->type);
2589 *p++ = cpu_to_be32(ace->flag);
2590 *p++ = cpu_to_be32(ace->access_mask &
2591 NFS4_ACE_MASK_ALL);
ddd1ea56 2592 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2593 if (status)
2594 goto out;
2595 }
2596 }
2597out_acl:
2598 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2599 p = xdr_reserve_space(xdr, 4);
2600 if (!p)
1da177e4 2601 goto out_resource;
0c9d65e7 2602 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2603 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2604 }
2605 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2606 p = xdr_reserve_space(xdr, 4);
2607 if (!p)
1da177e4 2608 goto out_resource;
c373b0a4 2609 *p++ = cpu_to_be32(1);
1da177e4
LT		 2610 }
2611 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2612 p = xdr_reserve_space(xdr, 4);
2613 if (!p)
1da177e4 2614 goto out_resource;
c373b0a4 2615 *p++ = cpu_to_be32(0);
1da177e4
LT		 2616 }
2617 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2618 p = xdr_reserve_space(xdr, 4);
2619 if (!p)
1da177e4 2620 goto out_resource;
c373b0a4 2621 *p++ = cpu_to_be32(1);
1da177e4
LT		 2622 }
2623 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2624 p = xdr_reserve_space(xdr, 4);
2625 if (!p)
1da177e4 2626 goto out_resource;
c373b0a4 2627 *p++ = cpu_to_be32(1);
1da177e4
LT		 2628 }
2629 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2630 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2631 if (!p)
1da177e4 2632 goto out_resource;
0c0c267b
BF		 2633 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2634 fhp->fh_handle.fh_size);
1da177e4
LT		 2635 }
2636 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2637 p = xdr_reserve_space(xdr, 8);
2638 if (!p)
1da177e4 2639 goto out_resource;
b64c7f3b 2640 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2641 }
2642 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2643 p = xdr_reserve_space(xdr, 8);
2644 if (!p)
1da177e4 2645 goto out_resource;
b64c7f3b 2646 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2647 }
2648 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2649 p = xdr_reserve_space(xdr, 8);
2650 if (!p)
1da177e4 2651 goto out_resource;
b64c7f3b 2652 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2653 }
2654 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2655 p = xdr_reserve_space(xdr, 8);
2656 if (!p)
1da177e4 2657 goto out_resource;
b64c7f3b 2658 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2659 }
81c3f413 2660 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2661 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2662 if (status)
2663 goto out;
2664 }
1da177e4 2665 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2666 p = xdr_reserve_space(xdr, 4);
2667 if (!p)
1da177e4 2668 goto out_resource;
c373b0a4 2669 *p++ = cpu_to_be32(1);
1da177e4
LT		 2670 }
2671 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2672 p = xdr_reserve_space(xdr, 8);
2673 if (!p)
1da177e4 2674 goto out_resource;
b64c7f3b 2675 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2676 }
2677 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2678 p = xdr_reserve_space(xdr, 4);
2679 if (!p)
1da177e4 2680 goto out_resource;
c373b0a4 2681 *p++ = cpu_to_be32(255);
1da177e4
LT		 2682 }
2683 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2684 p = xdr_reserve_space(xdr, 4);
2685 if (!p)
1da177e4 2686 goto out_resource;
c373b0a4 2687 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2688 }
2689 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2690 p = xdr_reserve_space(xdr, 8);
2691 if (!p)
1da177e4 2692 goto out_resource;
b64c7f3b 2693 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2694 }
2695 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2696 p = xdr_reserve_space(xdr, 8);
2697 if (!p)
1da177e4 2698 goto out_resource;
b64c7f3b 2699 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2700 }
2701 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2702 p = xdr_reserve_space(xdr, 4);
2703 if (!p)
1da177e4 2704 goto out_resource;
c373b0a4 2705 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2706 }
2707 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2708 p = xdr_reserve_space(xdr, 4);
2709 if (!p)
1da177e4 2710 goto out_resource;
c373b0a4 2711 *p++ = cpu_to_be32(1);
1da177e4
LT		 2712 }
2713 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2714 p = xdr_reserve_space(xdr, 4);
2715 if (!p)
1da177e4 2716 goto out_resource;
c373b0a4 2717 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2718 }
2719 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2720 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2721 if (status)
2722 goto out;
2723 }
2724 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2725 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2726 if (status)
2727 goto out;
2728 }
2729 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2730 p = xdr_reserve_space(xdr, 8);
2731 if (!p)
1da177e4 2732 goto out_resource;
c373b0a4
BF		 2733 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2734 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2735 }
2736 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2737 p = xdr_reserve_space(xdr, 8);
2738 if (!p)
1da177e4
LT		 2739 goto out_resource;
2740 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2741 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2742 }
2743 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2744 p = xdr_reserve_space(xdr, 8);
2745 if (!p)
1da177e4
LT		 2746 goto out_resource;
2747 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2748 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2749 }
2750 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2751 p = xdr_reserve_space(xdr, 8);
2752 if (!p)
1da177e4
LT		 2753 goto out_resource;
2754 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2755 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2756 }
2757 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2758 p = xdr_reserve_space(xdr, 8);
2759 if (!p)
1da177e4
LT		 2760 goto out_resource;
2761 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2762 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2763 }
2764 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2765 p = xdr_reserve_space(xdr, 12);
2766 if (!p)
1da177e4 2767 goto out_resource;
b64c7f3b 2768 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2769 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2770 }
2771 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2772 p = xdr_reserve_space(xdr, 12);
2773 if (!p)
1da177e4 2774 goto out_resource;
c373b0a4
BF		 2775 *p++ = cpu_to_be32(0);
2776 *p++ = cpu_to_be32(1);
2777 *p++ = cpu_to_be32(0);
1da177e4
LT		 2778 }
2779 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
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.ctime.tv_sec);
c373b0a4 2784 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2785 }
2786 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2787 p = xdr_reserve_space(xdr, 12);
2788 if (!p)
1da177e4 2789 goto out_resource;
b64c7f3b 2790 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2791 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2792 }
2793 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2794 struct kstat parent_stat;
2795 u64 ino = stat.ino;
2796
ddd1ea56
BF		 2797 p = xdr_reserve_space(xdr, 8);
2798 if (!p)
1da177e4 2799 goto out_resource;
406a7ea9
FF		 2800 /*
2801 * Get parent's attributes if not ignoring crossmount
2802 * and this is the root of a cross-mounted filesystem.
2803 */
2804 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2805 dentry == exp->ex_path.mnt->mnt_root) {
2806 err = get_parent_attributes(exp, &parent_stat);
2807 if (err)
2808 goto out_nfserr;
2809 ino = parent_stat.ino;
2810 }
2811 p = xdr_encode_hyper(p, ino);
1da177e4 2812 }
9cf514cc 2813#ifdef CONFIG_NFSD_PNFS
6896f15a 2814 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2815 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2816 if (status)
2817 goto out;
2818 }
2819
2820 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2821 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2822 if (status)
2823 goto out;
9cf514cc
CH		 2824 }
2825
2826 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2827 p = xdr_reserve_space(xdr, 4);
2828 if (!p)
2829 goto out_resource;
2830 *p++ = cpu_to_be32(stat.blksize);
2831 }
2832#endif /* CONFIG_NFSD_PNFS */
8c18f205 2833 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
75976de6
KM		 2834 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2835 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2836 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2837 if (status)
2838 goto out;
8c18f205 2839 }
7e705706 2840
7d580722
KM		 2841 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2842 status = nfsd4_encode_security_label(xdr, rqstp, context,
2843 contextlen);
2844 if (status)
2845 goto out;
2846 }
2847
082d4bd7
BF		 2848 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2849 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2850 status = nfs_ok;
2851
2852out:
ba4e55bb 2853#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2854 if (context)
2855 security_release_secctx(context, contextlen);
ba4e55bb 2856#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2857 kfree(acl);
18df11d0 2858 if (tempfh) {
d50e6136 2859 fh_put(tempfh);
18df11d0
YZ		 2860 kfree(tempfh);
2861 }
1fcea5b2
BF		 2862 if (status)
2863 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2864 return status;
2865out_nfserr:
b8dd7b9a 2866 status = nfserrno(err);
1da177e4
LT		 2867 goto out;
2868out_resource:
1da177e4
LT		 2869 status = nfserr_resource;
2870 goto out;
1da177e4
LT		 2871}
2872
2825a7f9
BF		 2873static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2874 struct xdr_buf *buf, __be32 *p, int bytes)
2875{
2876 xdr->scratch.iov_len = 0;
2877 memset(buf, 0, sizeof(struct xdr_buf));
2878 buf->head[0].iov_base = p;
2879 buf->head[0].iov_len = 0;
2880 buf->len = 0;
2881 xdr->buf = buf;
2882 xdr->iov = buf->head;
2883 xdr->p = p;
2884 xdr->end = (void *)p + bytes;
2885 buf->buflen = bytes;
2886}
2887
d5184658
BF		 2888__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2889 struct svc_fh *fhp, struct svc_export *exp,
2890 struct dentry *dentry, u32 *bmval,
2891 struct svc_rqst *rqstp, int ignore_crossmnt)
2892{
2825a7f9 2893 struct xdr_buf dummy;
d5184658
BF		 2894 struct xdr_stream xdr;
2895 __be32 ret;
2896
2825a7f9 2897 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2898 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2899 ignore_crossmnt);
2900 *p = xdr.p;
2901 return ret;
2902}
2903
c0ce6ec8
BF		 2904static inline int attributes_need_mount(u32 *bmval)
2905{
2906 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2907 return 1;
2908 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2909 return 1;
2910 return 0;
2911}
2912
b37ad28b 2913static __be32
561f0ed4
BF		 2914nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2915 const char *name, int namlen)
1da177e4
LT		 2916{
2917 struct svc_export *exp = cd->rd_fhp->fh_export;
2918 struct dentry *dentry;
b37ad28b 2919 __be32 nfserr;
406a7ea9 2920 int ignore_crossmnt = 0;
1da177e4 2921
bbddca8e 2922 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2923 if (IS_ERR(dentry))
2924 return nfserrno(PTR_ERR(dentry));
2b0143b5 2925 if (d_really_is_negative(dentry)) {
b2c0cea6 2926 /*
bbddca8e
N		 2927 * we're not holding the i_mutex here, so there's
2928 * a window where this directory entry could have gone
2929 * away.
b2c0cea6
BF		 2930 */
2931 dput(dentry);
2932 return nfserr_noent;
2933 }
1da177e4
LT		 2934
2935 exp_get(exp);
406a7ea9
FF		 2936 /*
2937 * In the case of a mountpoint, the client may be asking for
2938 * attributes that are only properties of the underlying filesystem
2939 * as opposed to the cross-mounted file system. In such a case,
2940 * we will not follow the cross mount and will fill the attribtutes
2941 * directly from the mountpoint dentry.
2942 */
3227fa41 2943 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2944 int err;
2945
3227fa41
BF		 2946 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2947 && !attributes_need_mount(cd->rd_bmval)) {
2948 ignore_crossmnt = 1;
2949 goto out_encode;
2950 }
dcb488a3
AA		 2951 /*
2952 * Why the heck aren't we just using nfsd_lookup??
2953 * Different "."/".." handling? Something else?
2954 * At least, add a comment here to explain....
2955 */
021d3a72
BF		 2956 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2957 if (err) {
2958 nfserr = nfserrno(err);
1da177e4
LT		 2959 goto out_put;
2960 }
dcb488a3
AA		 2961 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2962 if (nfserr)
2963 goto out_put;
1da177e4
LT		 2964
2965 }
3227fa41 2966out_encode:
561f0ed4 2967 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2968 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2969out_put:
2970 dput(dentry);
2971 exp_put(exp);
2972 return nfserr;
2973}
2974
2ebbc012 2975static __be32 *
561f0ed4 2976nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2977{
561f0ed4
BF		 2978 __be32 *p;
2979
c3a45617 2980 p = xdr_reserve_space(xdr, 20);
561f0ed4 2981 if (!p)
1da177e4
LT		 2982 return NULL;
2983 *p++ = htonl(2);
2984 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2985 *p++ = htonl(0); /* bmval1 */
2986
87915c64 2987 *p++ = htonl(4); /* attribute length */
1da177e4 2988 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2989 return p;
2990}
2991
2992static int
a0ad13ef
N		 2993nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2994 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2995{
a0ad13ef 2996 struct readdir_cd *ccd = ccdv;
1da177e4 2997 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2998 struct xdr_stream *xdr = cd->xdr;
2999 int start_offset = xdr->buf->len;
3000 int cookie_offset;
aee37764 3001 u32 name_and_cookie;
561f0ed4 3002 int entry_bytes;
b37ad28b 3003 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3004 __be64 wire_offset;
3005 __be32 *p;
1da177e4
LT		 3006
3007 /* In nfsv4, "." and ".." never make it onto the wire.. */
3008 if (name && isdotent(name, namlen)) {
3009 cd->common.err = nfs_ok;
3010 return 0;
3011 }
3012
561f0ed4
BF		 3013 if (cd->cookie_offset) {
3014 wire_offset = cpu_to_be64(offset);
3015 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3016 &wire_offset, 8);
3017 }
1da177e4 3018
561f0ed4
BF		 3019 p = xdr_reserve_space(xdr, 4);
3020 if (!p)
1da177e4 3021 goto fail;
1da177e4 3022 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3023 cookie_offset = xdr->buf->len;
3024 p = xdr_reserve_space(xdr, 3*4 + namlen);
3025 if (!p)
3026 goto fail;
1da177e4
LT		 3027 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3028 p = xdr_encode_array(p, name, namlen); /* name length & name */
3029
561f0ed4 3030 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3031 switch (nfserr) {
3032 case nfs_ok:
1da177e4
LT		 3033 break;
3034 case nfserr_resource:
3035 nfserr = nfserr_toosmall;
3036 goto fail;
b2c0cea6 3037 case nfserr_noent:
f41c5ad2 3038 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3039 goto skip_entry;
1da177e4
LT		 3040 default:
3041 /*
3042 * If the client requested the RDATTR_ERROR attribute,
3043 * we stuff the error code into this attribute
3044 * and continue. If this attribute was not requested,
3045 * then in accordance with the spec, we fail the
3046 * entire READDIR operation(!)
3047 */
3048 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3049 goto fail;
561f0ed4 3050 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3051 if (p == NULL) {
3052 nfserr = nfserr_toosmall;
1da177e4 3053 goto fail;
34081efc 3054 }
1da177e4 3055 }
561f0ed4
BF		 3056 nfserr = nfserr_toosmall;
3057 entry_bytes = xdr->buf->len - start_offset;
3058 if (entry_bytes > cd->rd_maxcount)
3059 goto fail;
3060 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3061 /*
3062 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3063 * let's always let through the first entry, at least:
3064 */
0ec016e3
BF		 3065 if (!cd->rd_dircount)
3066 goto fail;
3067 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3068 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3069 goto fail;
3070 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3071
561f0ed4 3072 cd->cookie_offset = cookie_offset;
b2c0cea6 3073skip_entry:
1da177e4
LT		 3074 cd->common.err = nfs_ok;
3075 return 0;
3076fail:
561f0ed4 3077 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3078 cd->common.err = nfserr;
3079 return -EINVAL;
3080}
3081
d0a381dd
BF		 3082static __be32
3083nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3084{
bc749ca4 3085 __be32 *p;
e2f282b9 3086
d0a381dd
BF		 3087 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3088 if (!p)
3089 return nfserr_resource;
c373b0a4 3090 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3091 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3092 sizeof(stateid_opaque_t));
d0a381dd 3093 return 0;
e2f282b9
BH		 3094}
3095
695e12f8 3096static __be32
b37ad28b 3097nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3098{
d0a381dd 3099 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3100 __be32 *p;
1da177e4
LT		 3101
3102 if (!nfserr) {
d0a381dd
BF		 3103 p = xdr_reserve_space(xdr, 8);
3104 if (!p)
3105 return nfserr_resource;
c373b0a4
BF		 3106 *p++ = cpu_to_be32(access->ac_supported);
3107 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 3108 }
695e12f8 3109 return nfserr;
1da177e4
LT		 3110}
3111
1d1bc8f2
BF		 3112static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3113{
d0a381dd 3114 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3115 __be32 *p;
3116
3117 if (!nfserr) {
d0a381dd
BF		 3118 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3119 if (!p)
3120 return nfserr_resource;
0c0c267b
BF		 3121 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3122 NFS4_MAX_SESSIONID_LEN);
c373b0a4 3123 *p++ = cpu_to_be32(bcts->dir);
4ce85c8c 3124 /* Upshifting from TCP to RDMA is not supported */
c373b0a4 3125 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 3126 }
3127 return nfserr;
3128}
3129
695e12f8 3130static __be32
b37ad28b 3131nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3132{
d0a381dd
BF		 3133 struct xdr_stream *xdr = &resp->xdr;
3134
e2f282b9 3135 if (!nfserr)
d0a381dd 3136 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 3137
695e12f8 3138 return nfserr;
1da177e4
LT		 3139}
3140
3141
695e12f8 3142static __be32
b37ad28b 3143nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3144{
d0a381dd 3145 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3146 __be32 *p;
1da177e4
LT		 3147
3148 if (!nfserr) {
d0a381dd
BF		 3149 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3150 if (!p)
3151 return nfserr_resource;
0c0c267b
BF		 3152 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3153 NFS4_VERIFIER_SIZE);
1da177e4 3154 }
695e12f8 3155 return nfserr;
1da177e4
LT		 3156}
3157
695e12f8 3158static __be32
b37ad28b 3159nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3160{
d0a381dd 3161 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3162 __be32 *p;
1da177e4
LT		 3163
3164 if (!nfserr) {
75976de6 3165 p = xdr_reserve_space(xdr, 20);
d0a381dd
BF		 3166 if (!p)
3167 return nfserr_resource;
75976de6
KM		 3168 encode_cinfo(p, &create->cr_cinfo);
3169 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3170 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4 3171 }
695e12f8 3172 return nfserr;
1da177e4
LT		 3173}
3174
b37ad28b
AV		 3175static __be32
3176nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3177{
3178 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3179 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 3180
3181 if (nfserr)
3182 return nfserr;
3183
d5184658
BF		 3184 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3185 getattr->ga_bmval,
406a7ea9 3186 resp->rqstp, 0);
1da177e4
LT		 3187 return nfserr;
3188}
3189
695e12f8
BH		 3190static __be32
3191nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3192{
d0a381dd 3193 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3194 struct svc_fh *fhp = *fhpp;
1da177e4 3195 unsigned int len;
bc749ca4 3196 __be32 *p;
1da177e4
LT		 3197
3198 if (!nfserr) {
3199 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 3200 p = xdr_reserve_space(xdr, len + 4);
3201 if (!p)
3202 return nfserr_resource;
0c0c267b 3203 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 3204 }
695e12f8 3205 return nfserr;
1da177e4
LT		 3206}
3207
3208/*
3209* Including all fields other than the name, a LOCK4denied structure requires
3210* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3211*/
d0a381dd
BF		 3212static __be32
3213nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3214{
7c13f344 3215 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3216 __be32 *p;
1da177e4 3217
8c7424cf 3218again:
d0a381dd 3219 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3220 if (!p) {
3221 /*
3222 * Don't fail to return the result just because we can't
3223 * return the conflicting open:
3224 */
3225 if (conf->len) {
f98bac5a 3226 kfree(conf->data);
8c7424cf
BF		 3227 conf->len = 0;
3228 conf->data = NULL;
3229 goto again;
3230 }
d0a381dd 3231 return nfserr_resource;
8c7424cf 3232 }
b64c7f3b
BF		 3233 p = xdr_encode_hyper(p, ld->ld_start);
3234 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3235 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3236 if (conf->len) {
0c0c267b
BF		 3237 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3238 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3239 kfree(conf->data);
1da177e4 3240 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3241 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3242 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3243 }
d0a381dd 3244 return nfserr_denied;
1da177e4
LT		 3245}
3246
695e12f8 3247static __be32
b37ad28b 3248nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3249{
d0a381dd
BF		 3250 struct xdr_stream *xdr = &resp->xdr;
3251
e2f282b9 3252 if (!nfserr)
d0a381dd 3253 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3254 else if (nfserr == nfserr_denied)
d0a381dd 3255 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3256
695e12f8 3257 return nfserr;
1da177e4
LT		 3258}
3259
695e12f8 3260static __be32
b37ad28b 3261nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3262{
d0a381dd
BF		 3263 struct xdr_stream *xdr = &resp->xdr;
3264
1da177e4 3265 if (nfserr == nfserr_denied)
d0a381dd 3266 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3267 return nfserr;
1da177e4
LT		 3268}
3269
695e12f8 3270static __be32
b37ad28b 3271nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3272{
d0a381dd
BF		 3273 struct xdr_stream *xdr = &resp->xdr;
3274
e2f282b9 3275 if (!nfserr)
d0a381dd 3276 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 3277
695e12f8 3278 return nfserr;
1da177e4
LT		 3279}
3280
3281
695e12f8 3282static __be32
b37ad28b 3283nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3284{
d0a381dd 3285 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3286 __be32 *p;
1da177e4
LT		 3287
3288 if (!nfserr) {
d0a381dd
BF		 3289 p = xdr_reserve_space(xdr, 20);
3290 if (!p)
3291 return nfserr_resource;
d05d5744 3292 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 3293 }
695e12f8 3294 return nfserr;
1da177e4
LT		 3295}
3296
3297
695e12f8 3298static __be32
b37ad28b 3299nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3300{
d0a381dd 3301 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3302 __be32 *p;
1da177e4
LT		 3303
3304 if (nfserr)
3305 goto out;
3306
d0a381dd
BF		 3307 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3308 if (nfserr)
3309 goto out;
75976de6 3310 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3311 if (!p)
3312 return nfserr_resource;
d05d5744 3313 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3314 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3315
75976de6
KM		 3316 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3317 open->op_bmval[2]);
3318 if (nfserr)
3319 goto out;
3320
3321 p = xdr_reserve_space(xdr, 4);
3322 if (!p)
3323 return nfserr_resource;
3324
3325 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3326 switch (open->op_delegate_type) {
3327 case NFS4_OPEN_DELEGATE_NONE:
3328 break;
3329 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3330 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3331 if (nfserr)
3332 return nfserr;
3333 p = xdr_reserve_space(xdr, 20);
3334 if (!p)
3335 return nfserr_resource;
c373b0a4 3336 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3337
3338 /*
3339 * TODO: ACE's in delegations
3340 */
c373b0a4
BF		 3341 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3342 *p++ = cpu_to_be32(0);
3343 *p++ = cpu_to_be32(0);
3344 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3345 break;
3346 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3347 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3348 if (nfserr)
3349 return nfserr;
3350 p = xdr_reserve_space(xdr, 32);
3351 if (!p)
3352 return nfserr_resource;
c373b0a4 3353 *p++ = cpu_to_be32(0);
1da177e4
LT		 3354
3355 /*
3356 * TODO: space_limit's in delegations
3357 */
c373b0a4
BF		 3358 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3359 *p++ = cpu_to_be32(~(u32)0);
3360 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3361
3362 /*
3363 * TODO: ACE's in delegations
3364 */
c373b0a4
BF		 3365 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3366 *p++ = cpu_to_be32(0);
3367 *p++ = cpu_to_be32(0);
3368 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3369 break;
d24433cd
BH		 3370 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3371 switch (open->op_why_no_deleg) {
3372 case WND4_CONTENTION:
3373 case WND4_RESOURCE:
d0a381dd
BF		 3374 p = xdr_reserve_space(xdr, 8);
3375 if (!p)
3376 return nfserr_resource;
c373b0a4
BF		 3377 *p++ = cpu_to_be32(open->op_why_no_deleg);
3378 /* deleg signaling not supported yet: */
3379 *p++ = cpu_to_be32(0);
d24433cd
BH		 3380 break;
3381 default:
d0a381dd
BF		 3382 p = xdr_reserve_space(xdr, 4);
3383 if (!p)
3384 return nfserr_resource;
c373b0a4 3385 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3386 }
d24433cd 3387 break;
1da177e4
LT		 3388 default:
3389 BUG();
3390 }
3391 /* XXX save filehandle here */
3392out:
695e12f8 3393 return nfserr;
1da177e4
LT		 3394}
3395
695e12f8 3396static __be32
b37ad28b 3397nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3398{
d0a381dd
BF		 3399 struct xdr_stream *xdr = &resp->xdr;
3400
e2f282b9 3401 if (!nfserr)
d0a381dd 3402 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3403
695e12f8 3404 return nfserr;
1da177e4
LT		 3405}
3406
695e12f8 3407static __be32
b37ad28b 3408nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3409{
d0a381dd
BF		 3410 struct xdr_stream *xdr = &resp->xdr;
3411
e2f282b9 3412 if (!nfserr)
d0a381dd 3413 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3414
695e12f8 3415 return nfserr;
1da177e4
LT		 3416}
3417
dc97618d
BF		 3418static __be32 nfsd4_encode_splice_read(
3419 struct nfsd4_compoundres *resp,
3420 struct nfsd4_read *read,
3421 struct file *file, unsigned long maxcount)
1da177e4 3422{
ddd1ea56 3423 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3424 struct xdr_buf *buf = xdr->buf;
dc97618d 3425 u32 eof;
ac503e4a 3426 long len;
30596768 3427 int space_left;
dc97618d 3428 __be32 nfserr;
fec25fa4 3429 __be32 *p = xdr->p - 2;
1da177e4 3430
d5d5c304
KM		 3431 /* Make sure there will be room for padding if needed */
3432 if (xdr->end - xdr->p < 1)
d0a381dd 3433 return nfserr_resource;
dc97618d 3434
ac503e4a 3435 len = maxcount;
dc97618d
BF		 3436 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3437 read->rd_offset, &maxcount);
3438 if (nfserr) {
3439 /*
3440 * nfsd_splice_actor may have already messed with the
3441 * page length; reset it so as not to confuse
3442 * xdr_truncate_encode:
3443 */
34a78b48 3444 buf->page_len = 0;
dc97618d 3445 return nfserr;
b0e35fda 3446 }
1da177e4 3447
ac503e4a
BC		 3448 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3449 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3450
fec25fa4
BF		 3451 *(p++) = htonl(eof);
3452 *(p++) = htonl(maxcount);
dc97618d 3453
34a78b48
BF		 3454 buf->page_len = maxcount;
3455 buf->len += maxcount;
15b23ef5
BF		 3456 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3457 / PAGE_SIZE;
dc97618d
BF		 3458
3459 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3460 buf->tail[0].iov_base = xdr->p;
3461 buf->tail[0].iov_len = 0;
fec25fa4 3462 xdr->iov = buf->tail;
dc97618d 3463 if (maxcount&3) {
fec25fa4
BF		 3464 int pad = 4 - (maxcount&3);
3465
3466 *(xdr->p++) = 0;
3467
34a78b48 3468 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3469 buf->tail[0].iov_len = pad;
3470 buf->len += pad;
b0e35fda 3471 }
2825a7f9 3472
dc97618d 3473 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3474 buf->buflen - buf->len);
3475 buf->buflen = buf->len + space_left;
dc97618d
BF		 3476 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3477
3478 return 0;
3479}
3480
3481static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3482 struct nfsd4_read *read,
3483 struct file *file, unsigned long maxcount)
3484{
3485 struct xdr_stream *xdr = &resp->xdr;
3486 u32 eof;
3487 int v;
dc97618d 3488 int starting_len = xdr->buf->len - 8;
dc97618d 3489 long len;
b0420980 3490 int thislen;
dc97618d
BF		 3491 __be32 nfserr;
3492 __be32 tmp;
3493 __be32 *p;
b0420980
BF		 3494 u32 zzz = 0;
3495 int pad;
1da177e4
LT		 3496
3497 len = maxcount;
3498 v = 0;
6ff9897d 3499
1055414f 3500 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3501 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3502 WARN_ON_ONCE(!p);
3503 resp->rqstp->rq_vec[v].iov_base = p;
3504 resp->rqstp->rq_vec[v].iov_len = thislen;
3505 v++;
3506 len -= thislen;
3507
3508 while (len) {
6ff9897d 3509 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3510 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3511 WARN_ON_ONCE(!p);
3512 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3513 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3514 v++;
6ff9897d 3515 len -= thislen;
1da177e4
LT		 3516 }
3517 read->rd_vlen = v;
3518
ac503e4a 3519 len = maxcount;
dc97618d
BF		 3520 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3521 read->rd_vlen, &maxcount);
3522 if (nfserr)
1da177e4 3523 return nfserr;
b0420980 3524 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3525
ac503e4a
BC		 3526 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3527 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3528
dc97618d
BF		 3529 tmp = htonl(eof);
3530 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3531 tmp = htonl(maxcount);
3532 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3533
b0420980
BF		 3534 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3535 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3536 &zzz, pad);
1da177e4 3537 return 0;
dc97618d
BF		 3538
3539}
3540
3541static __be32
3542nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3543 struct nfsd4_read *read)
3544{
3545 unsigned long maxcount;
3546 struct xdr_stream *xdr = &resp->xdr;
3547 struct file *file = read->rd_filp;
3548 int starting_len = xdr->buf->len;
e749a462 3549 struct raparms *ra = NULL;
dc97618d 3550 __be32 *p;
dc97618d
BF		 3551
3552 if (nfserr)
96bcad50 3553 goto out;
dc97618d
BF		 3554
3555 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3556 if (!p) {
779fb0f3 3557 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
96bcad50
CH		 3558 nfserr = nfserr_resource;
3559 goto out;
dc97618d 3560 }
68e8bb03
CH		 3561 if (resp->xdr.buf->page_len &&
3562 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3563 WARN_ON_ONCE(1);
96bcad50
CH		 3564 nfserr = nfserr_resource;
3565 goto out;
dc97618d 3566 }
dc97618d
BF		 3567 xdr_commit_encode(xdr);
3568
3569 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3570 maxcount = min_t(unsigned long, maxcount,
3571 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3572 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3573
af90f707 3574 if (read->rd_tmp_file)
e749a462 3575 ra = nfsd_init_raparms(file);
dc97618d 3576
68e8bb03
CH		 3577 if (file->f_op->splice_read &&
3578 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3579 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3580 else
96bcad50 3581 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3582
e749a462
CH		 3583 if (ra)
3584 nfsd_put_raparams(file, ra);
dc97618d 3585
96bcad50 3586 if (nfserr)
dc97618d 3587 xdr_truncate_encode(xdr, starting_len);
96bcad50
CH		 3588
3589out:
3590 if (file)
3591 fput(file);
3592 return nfserr;
1da177e4
LT		 3593}
3594
b37ad28b
AV		 3595static __be32
3596nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3597{
3598 int maxcount;
476a7b1f
BF		 3599 __be32 wire_count;
3600 int zero = 0;
ddd1ea56 3601 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3602 int length_offset = xdr->buf->len;
bc749ca4 3603 __be32 *p;
1da177e4
LT		 3604
3605 if (nfserr)
3606 return nfserr;
2825a7f9
BF		 3607
3608 p = xdr_reserve_space(xdr, 4);
3609 if (!p)
3610 return nfserr_resource;
1da177e4 3611 maxcount = PAGE_SIZE;
d0a381dd 3612
476a7b1f
BF		 3613 p = xdr_reserve_space(xdr, maxcount);
3614 if (!p)
4e21ac4b 3615 return nfserr_resource;
1da177e4 3616 /*
fd4a0edf
MS		 3617 * XXX: By default, vfs_readlink() will truncate symlinks if they
3618 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3619 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3620 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3621 */
476a7b1f
BF		 3622 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3623 (char *)p, &maxcount);
1da177e4 3624 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3625 nfserr = nfserr_inval;
3626 if (nfserr) {
1fcea5b2 3627 xdr_truncate_encode(xdr, length_offset);
1da177e4 3628 return nfserr;
d3f627c8 3629 }
1da177e4 3630
476a7b1f
BF		 3631 wire_count = htonl(maxcount);
3632 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3633 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3634 if (maxcount & 3)
3635 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3636 &zero, 4 - (maxcount&3));
1da177e4
LT		 3637 return 0;
3638}
3639
b37ad28b
AV		 3640static __be32
3641nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3642{
3643 int maxcount;
561f0ed4 3644 int bytes_left;
1da177e4 3645 loff_t offset;
561f0ed4 3646 __be64 wire_offset;
ddd1ea56 3647 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3648 int starting_len = xdr->buf->len;
bc749ca4 3649 __be32 *p;
1da177e4
LT		 3650
3651 if (nfserr)
3652 return nfserr;
1da177e4 3653
d0a381dd
BF		 3654 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3655 if (!p)
3656 return nfserr_resource;
1da177e4
LT		 3657
3658 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3659 *p++ = cpu_to_be32(0);
3660 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3661 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3662 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3663
3664 /*
561f0ed4
BF		 3665 * Number of bytes left for directory entries allowing for the
3666 * final 8 bytes of the readdir and a following failed op:
3667 */
3668 bytes_left = xdr->buf->buflen - xdr->buf->len
3669 - COMPOUND_ERR_SLACK_SPACE - 8;
3670 if (bytes_left < 0) {
3671 nfserr = nfserr_resource;
3672 goto err_no_verf;
3673 }
3674 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3675 /*
3676 * Note the rfc defines rd_maxcount as the size of the
3677 * READDIR4resok structure, which includes the verifier above
3678 * and the 8 bytes encoded at the end of this function:
1da177e4 3679 */
561f0ed4
BF		 3680 if (maxcount < 16) {
3681 nfserr = nfserr_toosmall;
1da177e4
LT		 3682 goto err_no_verf;
3683 }
561f0ed4 3684 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3685
aee37764
BF		 3686 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3687 if (!readdir->rd_dircount)
3688 readdir->rd_dircount = INT_MAX;
3689
561f0ed4
BF		 3690 readdir->xdr = xdr;
3691 readdir->rd_maxcount = maxcount;
1da177e4 3692 readdir->common.err = 0;
561f0ed4 3693 readdir->cookie_offset = 0;
1da177e4
LT		 3694
3695 offset = readdir->rd_cookie;
3696 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3697 &offset,
3698 &readdir->common, nfsd4_encode_dirent);
3699 if (nfserr == nfs_ok &&
3700 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3701 xdr->buf->len == starting_len + 8) {
3702 /* nothing encoded; which limit did we hit?: */
3703 if (maxcount - 16 < bytes_left)
3704 /* It was the fault of rd_maxcount: */
3705 nfserr = nfserr_toosmall;
3706 else
3707 /* We ran out of buffer space: */
3708 nfserr = nfserr_resource;
3709 }
1da177e4
LT		 3710 if (nfserr)
3711 goto err_no_verf;
3712
561f0ed4
BF		 3713 if (readdir->cookie_offset) {
3714 wire_offset = cpu_to_be64(offset);
3715 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3716 &wire_offset, 8);
3717 }
1da177e4 3718
561f0ed4
BF		 3719 p = xdr_reserve_space(xdr, 8);
3720 if (!p) {
3721 WARN_ON_ONCE(1);
3722 goto err_no_verf;
3723 }
1da177e4
LT		 3724 *p++ = 0; /* no more entries */
3725 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3726
3727 return 0;
3728err_no_verf:
1fcea5b2 3729 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3730 return nfserr;
3731}
3732
695e12f8 3733static __be32
b37ad28b 3734nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3735{
d0a381dd 3736 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3737 __be32 *p;
1da177e4
LT		 3738
3739 if (!nfserr) {
d0a381dd
BF		 3740 p = xdr_reserve_space(xdr, 20);
3741 if (!p)
3742 return nfserr_resource;
d05d5744 3743 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3744 }
695e12f8 3745 return nfserr;
1da177e4
LT		 3746}
3747
695e12f8 3748static __be32
b37ad28b 3749nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3750{
d0a381dd 3751 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3752 __be32 *p;
1da177e4
LT		 3753
3754 if (!nfserr) {
d0a381dd
BF		 3755 p = xdr_reserve_space(xdr, 40);
3756 if (!p)
3757 return nfserr_resource;
d05d5744
BF		 3758 p = encode_cinfo(p, &rename->rn_sinfo);
3759 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3760 }
695e12f8 3761 return nfserr;
1da177e4
LT		 3762}
3763
695e12f8 3764static __be32
d0a381dd 3765nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3766 __be32 nfserr, struct svc_export *exp)
dcb488a3 3767{
676e4ebd 3768 u32 i, nflavs, supported;
4796f457
BF		 3769 struct exp_flavor_info *flavs;
3770 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3771 __be32 *p, *flavorsp;
3772 static bool report = true;
dcb488a3
AA		 3773
3774 if (nfserr)
3775 goto out;
d0a381dd 3776 nfserr = nfserr_resource;
4796f457
BF		 3777 if (exp->ex_nflavors) {
3778 flavs = exp->ex_flavors;
3779 nflavs = exp->ex_nflavors;
3780 } else { /* Handling of some defaults in absence of real secinfo: */
3781 flavs = def_flavs;
3782 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3783 nflavs = 2;
3784 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3785 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3786 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3787 nflavs = 1;
3788 flavs[0].pseudoflavor
3789 = svcauth_gss_flavor(exp->ex_client);
3790 } else {
3791 nflavs = 1;
3792 flavs[0].pseudoflavor
3793 = exp->ex_client->flavour->flavour;
3794 }
3795 }
3796
676e4ebd 3797 supported = 0;
d0a381dd
BF		 3798 p = xdr_reserve_space(xdr, 4);
3799 if (!p)
3800 goto out;
676e4ebd 3801 flavorsp = p++; /* to be backfilled later */
676e4ebd 3802
4796f457 3803 for (i = 0; i < nflavs; i++) {
676e4ebd 3804 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3805 struct rpcsec_gss_info info;
dcb488a3 3806
676e4ebd
CL		 3807 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3808 supported++;
d0a381dd
BF		 3809 p = xdr_reserve_space(xdr, 4 + 4 +
3810 XDR_LEN(info.oid.len) + 4 + 4);
3811 if (!p)
3812 goto out;
c373b0a4 3813 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3814 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3815 *p++ = cpu_to_be32(info.qop);
3816 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3817 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3818 supported++;
d0a381dd
BF		 3819 p = xdr_reserve_space(xdr, 4);
3820 if (!p)
3821 goto out;
c373b0a4 3822 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3823 } else {
3824 if (report)
3825 pr_warn("NFS: SECINFO: security flavor %u "
3826 "is not supported\n", pf);
dcb488a3
AA		 3827 }
3828 }
a77c806f 3829
676e4ebd
CL		 3830 if (nflavs != supported)
3831 report = false;
3832 *flavorsp = htonl(supported);
d0a381dd 3833 nfserr = 0;
dcb488a3
AA		 3834out:
3835 if (exp)
3836 exp_put(exp);
695e12f8 3837 return nfserr;
dcb488a3
AA		 3838}
3839
22b6dee8
MJ		 3840static __be32
3841nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3842 struct nfsd4_secinfo *secinfo)
3843{
d0a381dd
BF		 3844 struct xdr_stream *xdr = &resp->xdr;
3845
3846 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3847}
3848
3849static __be32
3850nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3851 struct nfsd4_secinfo_no_name *secinfo)
3852{
d0a381dd
BF		 3853 struct xdr_stream *xdr = &resp->xdr;
3854
3855 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3856}
3857
1da177e4
LT		 3858/*
3859 * The SETATTR encode routine is special -- it always encodes a bitmap,
3860 * regardless of the error status.
3861 */
695e12f8 3862static __be32
b37ad28b 3863nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3864{
d0a381dd 3865 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3866 __be32 *p;
1da177e4 3867
d0a381dd
BF		 3868 p = xdr_reserve_space(xdr, 16);
3869 if (!p)
3870 return nfserr_resource;
1da177e4 3871 if (nfserr) {
c373b0a4
BF		 3872 *p++ = cpu_to_be32(3);
3873 *p++ = cpu_to_be32(0);
3874 *p++ = cpu_to_be32(0);
3875 *p++ = cpu_to_be32(0);
1da177e4
LT		 3876 }
3877 else {
c373b0a4
BF		 3878 *p++ = cpu_to_be32(3);
3879 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3880 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3881 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3882 }
695e12f8 3883 return nfserr;
1da177e4
LT		 3884}
3885
695e12f8 3886static __be32
b37ad28b 3887nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3888{
d0a381dd 3889 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3890 __be32 *p;
1da177e4
LT		 3891
3892 if (!nfserr) {
d0a381dd
BF		 3893 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3894 if (!p)
3895 return nfserr_resource;
0c0c267b
BF		 3896 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3897 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3898 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3899 }
3900 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3901 p = xdr_reserve_space(xdr, 8);
3902 if (!p)
3903 return nfserr_resource;
c373b0a4
BF		 3904 *p++ = cpu_to_be32(0);
3905 *p++ = cpu_to_be32(0);
1da177e4 3906 }
695e12f8 3907 return nfserr;
1da177e4
LT		 3908}
3909
695e12f8 3910static __be32
b37ad28b 3911nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3912{
d0a381dd 3913 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3914 __be32 *p;
1da177e4
LT		 3915
3916 if (!nfserr) {
d0a381dd
BF		 3917 p = xdr_reserve_space(xdr, 16);
3918 if (!p)
3919 return nfserr_resource;
c373b0a4
BF		 3920 *p++ = cpu_to_be32(write->wr_bytes_written);
3921 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3922 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3923 NFS4_VERIFIER_SIZE);
1da177e4 3924 }
695e12f8 3925 return nfserr;
1da177e4
LT		 3926}
3927
2db134eb 3928static __be32
57b7b43b 3929nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3930 struct nfsd4_exchange_id *exid)
3931{
d0a381dd 3932 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3933 __be32 *p;
0733d213
AA		 3934 char *major_id;
3935 char *server_scope;
3936 int major_id_sz;
3937 int server_scope_sz;
ed941643 3938 int status = 0;
0733d213
AA		 3939 uint64_t minor_id = 0;
3940
3941 if (nfserr)
3942 return nfserr;
3943
3944 major_id = utsname()->nodename;
3945 major_id_sz = strlen(major_id);
3946 server_scope = utsname()->nodename;
3947 server_scope_sz = strlen(server_scope);
3948
d0a381dd 3949 p = xdr_reserve_space(xdr,
0733d213
AA		 3950 8 /* eir_clientid */ +
3951 4 /* eir_sequenceid */ +
3952 4 /* eir_flags */ +
a8bb84bc 3953 4 /* spr_how */);
d0a381dd
BF		 3954 if (!p)
3955 return nfserr_resource;
0733d213 3956
0c0c267b 3957 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3958 *p++ = cpu_to_be32(exid->seqid);
3959 *p++ = cpu_to_be32(exid->flags);
0733d213 3960
c373b0a4 3961 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3962
57266a6e
BF		 3963 switch (exid->spa_how) {
3964 case SP4_NONE:
3965 break;
3966 case SP4_MACH_CRED:
3967 /* spo_must_enforce bitmap: */
ed941643
AE		 3968 status = nfsd4_encode_bitmap(xdr,
3969 exid->spo_must_enforce[0],
3970 exid->spo_must_enforce[1],
3971 exid->spo_must_enforce[2]);
3972 if (status)
3973 goto out;
3974 /* spo_must_allow bitmap: */
3975 status = nfsd4_encode_bitmap(xdr,
3976 exid->spo_must_allow[0],
3977 exid->spo_must_allow[1],
3978 exid->spo_must_allow[2]);
3979 if (status)
3980 goto out;
57266a6e
BF		 3981 break;
3982 default:
3983 WARN_ON_ONCE(1);
3984 }
0733d213 3985
d0a381dd 3986 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3987 8 /* so_minor_id */ +
3988 4 /* so_major_id.len */ +
3989 (XDR_QUADLEN(major_id_sz) * 4) +
3990 4 /* eir_server_scope.len */ +
3991 (XDR_QUADLEN(server_scope_sz) * 4) +
3992 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3993 if (!p)
3994 return nfserr_resource;
a8bb84bc 3995
0733d213 3996 /* The server_owner struct */
b64c7f3b 3997 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3998 /* major id */
0c0c267b 3999 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4000
4001 /* Server scope */
0c0c267b 4002 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4003
4004 /* Implementation id */
c373b0a4 4005 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4006 return 0;
ed941643
AE		 4007out:
4008 return status;
2db134eb
AA		 4009}
4010
4011static __be32
57b7b43b 4012nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4013 struct nfsd4_create_session *sess)
4014{
d0a381dd 4015 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4016 __be32 *p;
ec6b5d7b
AA		 4017
4018 if (nfserr)
4019 return nfserr;
4020
d0a381dd
BF		 4021 p = xdr_reserve_space(xdr, 24);
4022 if (!p)
4023 return nfserr_resource;
0c0c267b
BF		 4024 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4025 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4026 *p++ = cpu_to_be32(sess->seqid);
4027 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4028
d0a381dd
BF		 4029 p = xdr_reserve_space(xdr, 28);
4030 if (!p)
4031 return nfserr_resource;
c373b0a4
BF		 4032 *p++ = cpu_to_be32(0); /* headerpadsz */
4033 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4034 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4035 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4036 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4037 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4038 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4039
4040 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4041 p = xdr_reserve_space(xdr, 4);
4042 if (!p)
4043 return nfserr_resource;
c373b0a4 4044 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4045 }
4046
d0a381dd
BF		 4047 p = xdr_reserve_space(xdr, 28);
4048 if (!p)
4049 return nfserr_resource;
c373b0a4
BF		 4050 *p++ = cpu_to_be32(0); /* headerpadsz */
4051 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4052 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4053 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4054 *p++ = cpu_to_be32(sess->back_channel.maxops);
4055 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4056 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4057
4058 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4059 p = xdr_reserve_space(xdr, 4);
4060 if (!p)
4061 return nfserr_resource;
c373b0a4 4062 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4063 }
4064 return 0;
2db134eb
AA		 4065}
4066
c47d832b 4067static __be32
57b7b43b 4068nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4069 struct nfsd4_sequence *seq)
4070{
d0a381dd 4071 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4072 __be32 *p;
b85d4c01
BH		 4073
4074 if (nfserr)
4075 return nfserr;
4076
d0a381dd
BF		 4077 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4078 if (!p)
4079 return nfserr_resource;
0c0c267b
BF		 4080 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4081 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4082 *p++ = cpu_to_be32(seq->seqid);
4083 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4084 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4085 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4086 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4087 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4088
f5236013 4089 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4090 return 0;
2db134eb
AA		 4091}
4092
2355c596 4093static __be32
57b7b43b 4094nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4095 struct nfsd4_test_stateid *test_stateid)
4096{
d0a381dd 4097 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4098 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4099 __be32 *p;
17456804 4100
a11fcce1
BF		 4101 if (nfserr)
4102 return nfserr;
4103
d0a381dd
BF		 4104 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4105 if (!p)
4106 return nfserr_resource;
17456804 4107 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4108
03cfb420 4109 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4110 *p++ = stateid->ts_id_status;
17456804 4111 }
17456804
BS		 4112
4113 return nfserr;
4114}
4115
9cf514cc
CH		 4116#ifdef CONFIG_NFSD_PNFS
4117static __be32
4118nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4119 struct nfsd4_getdeviceinfo *gdev)
4120{
4121 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4122 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4123 u32 starting_len = xdr->buf->len, needed_len;
4124 __be32 *p;
4125
bec782b4 4126 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr));
9cf514cc
CH		 4127 if (nfserr)
4128 goto out;
4129
4130 nfserr = nfserr_resource;
4131 p = xdr_reserve_space(xdr, 4);
4132 if (!p)
4133 goto out;
4134
4135 *p++ = cpu_to_be32(gdev->gd_layout_type);
4136
4137 /* If maxcount is 0 then just update notifications */
4138 if (gdev->gd_maxcount != 0) {
f961e3f2 4139 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4140 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4141 if (nfserr) {
4142 /*
4143 * We don't bother to burden the layout drivers with
4144 * enforcing gd_maxcount, just tell the client to
4145 * come back with a bigger buffer if it's not enough.
4146 */
4147 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4148 goto toosmall;
4149 goto out;
4150 }
4151 }
4152
4153 nfserr = nfserr_resource;
4154 if (gdev->gd_notify_types) {
4155 p = xdr_reserve_space(xdr, 4 + 4);
4156 if (!p)
4157 goto out;
4158 *p++ = cpu_to_be32(1); /* bitmap length */
4159 *p++ = cpu_to_be32(gdev->gd_notify_types);
4160 } else {
4161 p = xdr_reserve_space(xdr, 4);
4162 if (!p)
4163 goto out;
4164 *p++ = 0;
4165 }
4166
4167 nfserr = 0;
4168out:
4169 kfree(gdev->gd_device);
4170 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4171 return nfserr;
4172
4173toosmall:
4174 dprintk("%s: maxcount too small\n", __func__);
4175 needed_len = xdr->buf->len + 4 /* notifications */;
4176 xdr_truncate_encode(xdr, starting_len);
4177 p = xdr_reserve_space(xdr, 4);
4178 if (!p) {
4179 nfserr = nfserr_resource;
4180 } else {
4181 *p++ = cpu_to_be32(needed_len);
4182 nfserr = nfserr_toosmall;
4183 }
4184 goto out;
4185}
4186
4187static __be32
4188nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4189 struct nfsd4_layoutget *lgp)
4190{
4191 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4192 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4193 __be32 *p;
4194
4195 dprintk("%s: err %d\n", __func__, nfserr);
4196 if (nfserr)
4197 goto out;
4198
4199 nfserr = nfserr_resource;
4200 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4201 if (!p)
4202 goto out;
4203
4204 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4205 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4206 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4207 sizeof(stateid_opaque_t));
4208
4209 *p++ = cpu_to_be32(1); /* we always return a single layout */
4210 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4211 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4212 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4213 *p++ = cpu_to_be32(lgp->lg_layout_type);
4214
f961e3f2 4215 ops = nfsd4_layout_ops[lgp->lg_layout_type];
9cf514cc
CH		 4216 nfserr = ops->encode_layoutget(xdr, lgp);
4217out:
4218 kfree(lgp->lg_content);
4219 return nfserr;
4220}
4221
4222static __be32
4223nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4224 struct nfsd4_layoutcommit *lcp)
4225{
4226 struct xdr_stream *xdr = &resp->xdr;
4227 __be32 *p;
4228
4229 if (nfserr)
4230 return nfserr;
4231
4232 p = xdr_reserve_space(xdr, 4);
4233 if (!p)
4234 return nfserr_resource;
4235 *p++ = cpu_to_be32(lcp->lc_size_chg);
4236 if (lcp->lc_size_chg) {
4237 p = xdr_reserve_space(xdr, 8);
4238 if (!p)
4239 return nfserr_resource;
4240 p = xdr_encode_hyper(p, lcp->lc_newsize);
4241 }
4242
4243 return nfs_ok;
4244}
4245
4246static __be32
4247nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4248 struct nfsd4_layoutreturn *lrp)
4249{
4250 struct xdr_stream *xdr = &resp->xdr;
4251 __be32 *p;
4252
4253 if (nfserr)
4254 return nfserr;
4255
4256 p = xdr_reserve_space(xdr, 4);
4257 if (!p)
4258 return nfserr_resource;
4259 *p++ = cpu_to_be32(lrp->lrs_present);
4260 if (lrp->lrs_present)
376675da 4261 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
9cf514cc
CH		 4262 return nfs_ok;
4263}
4264#endif /* CONFIG_NFSD_PNFS */
4265
29ae7f9d
AS		 4266static __be32
4267nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4268{
4269 __be32 *p;
4270
4271 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4272 if (!p)
4273 return nfserr_resource;
4274
4275 *p++ = cpu_to_be32(0);
4276 p = xdr_encode_hyper(p, write->wr_bytes_written);
4277 *p++ = cpu_to_be32(write->wr_stable_how);
4278 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4279 NFS4_VERIFIER_SIZE);
4280 return nfs_ok;
4281}
4282
4283static __be32
4284nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4285 struct nfsd4_copy *copy)
4286{
4287 __be32 *p;
4288
4289 if (!nfserr) {
4290 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4291 if (nfserr)
4292 return nfserr;
4293
4294 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4295 *p++ = cpu_to_be32(copy->cp_consecutive);
4296 *p++ = cpu_to_be32(copy->cp_synchronous);
4297 }
4298 return nfserr;
4299}
4300
24bab491
AS		 4301static __be32
4302nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4303 struct nfsd4_seek *seek)
4304{
4305 __be32 *p;
4306
4307 if (nfserr)
4308 return nfserr;
4309
4310 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4311 *p++ = cpu_to_be32(seek->seek_eof);
4312 p = xdr_encode_hyper(p, seek->seek_pos);
4313
4314 return nfserr;
4315}
4316
695e12f8
BH		 4317static __be32
4318nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4319{
4320 return nfserr;
4321}
4322
4323typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4324
2db134eb
AA		 4325/*
4326 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4327 * since we don't need to filter out obsolete ops as this is
4328 * done in the decoding phase.
4329 */
695e12f8 4330static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4331 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4332 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4333 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4334 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4335 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4336 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4338 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4339 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4340 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4341 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4342 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4343 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4344 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4345 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4346 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4347 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4348 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4349 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4350 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4351 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4352 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4353 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4354 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4355 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4356 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4357 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4358 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4359 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4360 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4361 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4362 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4363 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4364 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4365 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4366 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4367 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4368
4369 /* NFSv4.1 operations */
4370 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4371 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4372 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4373 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4374 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4375 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4376 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4377#ifdef CONFIG_NFSD_PNFS
4378 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4379 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4380 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4381 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4382 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4383#else
2db134eb
AA		 4384 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4385 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4386 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4387 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4389#endif
22b6dee8 4390 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4391 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4392 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4393 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4394 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4395 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4396 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4397
4398 /* NFSv4.2 operations */
4399 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4400 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4401 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4402 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4403 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4404 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4405 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4406 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4407 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4408 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4409 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4410 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4411 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4412};
4413
496c262c 4414/*
a8095f7e
BF		 4415 * Calculate whether we still have space to encode repsize bytes.
4416 * There are two considerations:
4417 * - For NFS versions >=4.1, the size of the reply must stay within
4418 * session limits
4419 * - For all NFS versions, we must stay within limited preallocated
4420 * buffer space.
496c262c 4421 *
a8095f7e
BF		 4422 * This is called before the operation is processed, so can only provide
4423 * an upper estimate. For some nonidempotent operations (such as
4424 * getattr), it's not necessarily a problem if that estimate is wrong,
4425 * as we can fail it after processing without significant side effects.
496c262c 4426 */
a8095f7e 4427__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4428{
67492c99 4429 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4430 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4431
47ee5298
BF		 4432 if (buf->len + respsize <= buf->buflen)
4433 return nfs_ok;
4434 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4435 return nfserr_resource;
47ee5298
BF		 4436 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4437 WARN_ON_ONCE(1);
4438 return nfserr_rep_too_big_to_cache;
ea8d7720 4439 }
47ee5298 4440 return nfserr_rep_too_big;
496c262c
AA		 4441}
4442
1da177e4
LT		 4443void
4444nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4445{
082d4bd7 4446 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4447 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4448 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 4449 int post_err_offset;
07d1f802 4450 nfsd4_enc encoder;
bc749ca4 4451 __be32 *p;
1da177e4 4452
d0a381dd
BF		 4453 p = xdr_reserve_space(xdr, 8);
4454 if (!p) {
4455 WARN_ON_ONCE(1);
4456 return;
4457 }
c373b0a4 4458 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4459 post_err_offset = xdr->buf->len;
1da177e4 4460
695e12f8
BH		 4461 if (op->opnum == OP_ILLEGAL)
4462 goto status;
4463 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4464 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4465 encoder = nfsd4_enc_ops[op->opnum];
4466 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 4467 xdr_commit_encode(xdr);
4468
067e1ace 4469 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4470 if (!op->status) {
4471 int space_needed = 0;
4472 if (!nfsd4_last_compound_op(rqstp))
4473 space_needed = COMPOUND_ERR_SLACK_SPACE;
4474 op->status = nfsd4_check_resp_size(resp, space_needed);
4475 }
c8f13d97
BF		 4476 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4477 struct nfsd4_slot *slot = resp->cstate.slot;
4478
4479 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4480 op->status = nfserr_rep_too_big_to_cache;
4481 else
4482 op->status = nfserr_rep_too_big;
4483 }
07d1f802
BF		 4484 if (op->status == nfserr_resource ||
4485 op->status == nfserr_rep_too_big ||
4486 op->status == nfserr_rep_too_big_to_cache) {
4487 /*
4488 * The operation may have already been encoded or
4489 * partially encoded. No op returns anything additional
4490 * in the case of one of these three errors, so we can
4491 * just truncate back to after the status. But it's a
4492 * bug if we had to do this on a non-idempotent op:
4493 */
4494 warn_on_nonidempotent_op(op);
082d4bd7 4495 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4496 }
9411b1d4 4497 if (so) {
082d4bd7
BF		 4498 int len = xdr->buf->len - post_err_offset;
4499
9411b1d4 4500 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4501 so->so_replay.rp_buflen = len;
4502 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4503 so->so_replay.rp_buf, len);
9411b1d4 4504 }
695e12f8 4505status:
082d4bd7
BF		 4506 /* Note that op->status is already in network byte order: */
4507 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4508}
4509
4510/*
4511 * Encode the reply stored in the stateowner reply cache
4512 *
4513 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4514 * previously sent already encoded operation.
1da177e4
LT		 4515 */
4516void
d0a381dd 4517nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4518{
bc749ca4 4519 __be32 *p;
1da177e4
LT		 4520 struct nfs4_replay *rp = op->replay;
4521
4522 BUG_ON(!rp);
4523
d0a381dd
BF		 4524 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4525 if (!p) {
4526 WARN_ON_ONCE(1);
4527 return;
4528 }
c373b0a4 4529 *p++ = cpu_to_be32(op->opnum);
1da177e4 4530 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4531
0c0c267b 4532 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4533}
4534
1da177e4 4535int
2ebbc012 4536nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 4537{
4538 return xdr_ressize_check(rqstp, p);
4539}
4540
3e98abff 4541int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 4542{
3e98abff
BF		 4543 struct svc_rqst *rqstp = rq;
4544 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4545
1da177e4
LT		 4546 if (args->ops != args->iops) {
4547 kfree(args->ops);
4548 args->ops = args->iops;
4549 }
f99d49ad
JJ		 4550 kfree(args->tmpp);
4551 args->tmpp = NULL;
1da177e4 4552 while (args->to_free) {
d5e23383 4553 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4554 args->to_free = tb->next;
1da177e4
LT		 4555 kfree(tb);
4556 }
3e98abff 4557 return 1;
1da177e4
LT		 4558}
4559
4560int
2ebbc012 4561nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 4562{
e874f9f8
JL		 4563 if (rqstp->rq_arg.head[0].iov_len % 4) {
4564 /* client is nuts */
4565 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4566 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4567 return 0;
4568 }
1da177e4
LT		 4569 args->p = p;
4570 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4571 args->pagelist = rqstp->rq_arg.pages;
4572 args->pagelen = rqstp->rq_arg.page_len;
4573 args->tmpp = NULL;
4574 args->to_free = NULL;
4575 args->ops = args->iops;
4576 args->rqstp = rqstp;
4577
3e98abff 4578 return !nfsd4_decode_compound(args);
1da177e4
LT		 4579}
4580
4581int
2ebbc012 4582nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4583{
4584 /*
4585 * All that remains is to write the tag and operation count...
4586 */
6ac90391
BF		 4587 struct xdr_buf *buf = resp->xdr.buf;
4588
4589 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4590 buf->tail[0].iov_len);
dd97fdde 4591
2825a7f9
BF		 4592 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4593
1da177e4
LT		 4594 p = resp->tagp;
4595 *p++ = htonl(resp->taglen);
4596 memcpy(p, resp->tag, resp->taglen);
4597 p += XDR_QUADLEN(resp->taglen);
4598 *p++ = htonl(resp->opcnt);
4599
b607664e 4600 nfsd4_sequence_done(resp);
1da177e4
LT		 4601 return 1;
4602}
4603
4604/*
4605 * Local variables:
4606 * c-basic-offset: 8
4607 * End:
4608 */
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