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nfsd4: replace defer_free by svcxdr_tmpalloc
[mirror_ubuntu-artful-kernel.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 <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
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.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
1da177e4
LT		 101#define READMEM(x,nbytes) do { \
102 x = (char *)p; \
103 p += XDR_QUADLEN(nbytes); \
104} while (0)
105#define SAVEMEM(x,nbytes) do { \
106 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
107 savemem(argp, p, nbytes) : \
108 (char *)p)) { \
817cb9d4
CL		 109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
1da177e4
LT		 111 goto xdr_error; \
112 } \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define COPYMEM(x,nbytes) do { \
116 memcpy((x), p, nbytes); \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119
120/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
121#define READ_BUF(nbytes) do { \
122 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
123 p = argp->p; \
124 argp->p += XDR_QUADLEN(nbytes); \
125 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 126 dprintk("NFSD: xdr error (%s:%d)\n", \
127 __FILE__, __LINE__); \
1da177e4
LT		 128 goto xdr_error; \
129 } \
130} while (0)
131
590b7431
BF		 132static void next_decode_page(struct nfsd4_compoundargs *argp)
133{
590b7431 134 argp->p = page_address(argp->pagelist[0]);
365da4ad 135 argp->pagelist++;
590b7431
BF		 136 if (argp->pagelen < PAGE_SIZE) {
137 argp->end = argp->p + (argp->pagelen>>2);
138 argp->pagelen = 0;
139 } else {
140 argp->end = argp->p + (PAGE_SIZE>>2);
141 argp->pagelen -= PAGE_SIZE;
142 }
143}
144
ca2a05aa 145static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 146{
147 /* We want more bytes than seem to be available.
148 * Maybe we need a new page, maybe we have just run out
149 */
ca2a05aa 150 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 151 __be32 *p;
1da177e4
LT		 152 if (avail + argp->pagelen < nbytes)
153 return NULL;
154 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
155 return NULL;
156 /* ok, we can do it with the current plus the next page */
157 if (nbytes <= sizeof(argp->tmp))
158 p = argp->tmp;
159 else {
f99d49ad 160 kfree(argp->tmpp);
1da177e4
LT		 161 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
162 if (!p)
163 return NULL;
164
165 }
ca2a05aa
BF		 166 /*
167 * The following memcpy is safe because read_buf is always
168 * called with nbytes > avail, and the two cases above both
169 * guarantee p points to at least nbytes bytes.
170 */
1da177e4 171 memcpy(p, argp->p, avail);
590b7431 172 next_decode_page(argp);
1da177e4
LT		 173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
174 argp->p += XDR_QUADLEN(nbytes - avail);
175 return p;
176}
177
60adfc50
AA		 178static int zero_clientid(clientid_t *clid)
179{
180 return (clid->cl_boot == 0) && (clid->cl_id == 0);
181}
182
2d8498db 183/**
d5e23383 184 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 185 * @argp: NFSv4 compound argument structure
186 * @p: pointer to be freed (with kfree())
2d8498db
CH		 187 *
188 * Marks @p to be freed when processing the compound operation
189 * described in @argp finishes.
190 */
d5e23383
BF		 191static void *
192svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 193{
d5e23383 194 struct svcxdr_tmpbuf *tb;
1da177e4 195
d5e23383 196 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 197 if (!tb)
d5e23383 198 return NULL;
1da177e4
LT		 199 tb->next = argp->to_free;
200 argp->to_free = tb;
d5e23383 201 return tb->buf;
1da177e4
LT		 202}
203
29c353b3
BF		 204/*
205 * For xdr strings that need to be passed to other kernel api's
206 * as null-terminated strings.
207 *
208 * Note null-terminating in place usually isn't safe since the
209 * buffer might end on a page boundary.
210 */
211static char *
212svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
213{
d5e23383 214 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 215
216 if (!p)
217 return NULL;
218 memcpy(p, buf, len);
219 p[len] = '\0';
29c353b3
BF		 220 return p;
221}
222
2d8498db
CH		 223/**
224 * savemem - duplicate a chunk of memory for later processing
225 * @argp: NFSv4 compound argument structure to be freed with
226 * @p: pointer to be duplicated
227 * @nbytes: length to be duplicated
228 *
229 * Returns a pointer to a copy of @nbytes bytes of memory at @p
230 * that are preserved until processing of the NFSv4 compound
231 * operation described by @argp finishes.
232 */
2ebbc012 233static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 234{
d5e23383
BF		 235 void *ret;
236
237 ret = svcxdr_tmpalloc(argp, nbytes);
238 if (!ret)
1da177e4 239 return NULL;
d5e23383
BF		 240 memcpy(ret, p, nbytes);
241 return ret;
1da177e4
LT		 242}
243
b37ad28b 244static __be32
1da177e4
LT		 245nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
246{
247 u32 bmlen;
248 DECODE_HEAD;
249
250 bmval[0] = 0;
251 bmval[1] = 0;
7e705706 252 bmval[2] = 0;
1da177e4
LT		 253
254 READ_BUF(4);
06553991 255 bmlen = be32_to_cpup(p++);
1da177e4
LT		 256 if (bmlen > 1000)
257 goto xdr_error;
258
259 READ_BUF(bmlen << 2);
260 if (bmlen > 0)
06553991 261 bmval[0] = be32_to_cpup(p++);
1da177e4 262 if (bmlen > 1)
06553991 263 bmval[1] = be32_to_cpup(p++);
7e705706 264 if (bmlen > 2)
06553991 265 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 266
267 DECODE_TAIL;
268}
269
b37ad28b 270static __be32
3c8e0316 271nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 272 struct iattr *iattr, struct nfs4_acl **acl,
273 struct xdr_netobj *label)
1da177e4
LT		 274{
275 int expected_len, len = 0;
276 u32 dummy32;
542d1ab3 277 u64 sec;
1da177e4
LT		 278 char *buf;
279
280 DECODE_HEAD;
281 iattr->ia_valid = 0;
282 if ((status = nfsd4_decode_bitmap(argp, bmval)))
283 return status;
284
1da177e4 285 READ_BUF(4);
06553991 286 expected_len = be32_to_cpup(p++);
1da177e4
LT		 287
288 if (bmval[0] & FATTR4_WORD0_SIZE) {
289 READ_BUF(8);
290 len += 8;
542d1ab3 291 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 292 iattr->ia_valid |= ATTR_SIZE;
293 }
294 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 295 u32 nace;
28e05dd8 296 struct nfs4_ace *ace;
1da177e4
LT		 297
298 READ_BUF(4); len += 4;
06553991 299 nace = be32_to_cpup(p++);
1da177e4 300
28e05dd8 301 if (nace > NFS4_ACL_MAX)
798df338 302 return nfserr_fbig;
28e05dd8 303
d5e23383 304 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 305 if (*acl == NULL)
306 return nfserr_jukebox;
307
28e05dd8
BF		 308 (*acl)->naces = nace;
309 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 310 READ_BUF(16); len += 16;
06553991
BF		 311 ace->type = be32_to_cpup(p++);
312 ace->flag = be32_to_cpup(p++);
313 ace->access_mask = be32_to_cpup(p++);
314 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 315 READ_BUF(dummy32);
316 len += XDR_QUADLEN(dummy32) << 2;
317 READMEM(buf, dummy32);
28e05dd8 318 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 319 status = nfs_ok;
28e05dd8 320 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 321 ;
28e05dd8 322 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 323 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_gid);
1da177e4 325 else
3c726023 326 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 327 buf, dummy32, &ace->who_uid);
3c726023
BF		 328 if (status)
329 return status;
1da177e4
LT		 330 }
331 } else
332 *acl = NULL;
333 if (bmval[1] & FATTR4_WORD1_MODE) {
334 READ_BUF(4);
335 len += 4;
06553991 336 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 337 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
338 iattr->ia_valid |= ATTR_MODE;
339 }
340 if (bmval[1] & FATTR4_WORD1_OWNER) {
341 READ_BUF(4);
342 len += 4;
06553991 343 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 344 READ_BUF(dummy32);
345 len += (XDR_QUADLEN(dummy32) << 2);
346 READMEM(buf, dummy32);
47c85291
N		 347 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
348 return status;
1da177e4
LT		 349 iattr->ia_valid |= ATTR_UID;
350 }
351 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
352 READ_BUF(4);
353 len += 4;
06553991 354 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 355 READ_BUF(dummy32);
356 len += (XDR_QUADLEN(dummy32) << 2);
357 READMEM(buf, dummy32);
47c85291
N		 358 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
359 return status;
1da177e4
LT		 360 iattr->ia_valid |= ATTR_GID;
361 }
362 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
363 READ_BUF(4);
364 len += 4;
06553991 365 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 366 switch (dummy32) {
367 case NFS4_SET_TO_CLIENT_TIME:
368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
369 all 32 bits of 'nseconds'. */
370 READ_BUF(12);
371 len += 12;
542d1ab3
BF		 372 p = xdr_decode_hyper(p, &sec);
373 iattr->ia_atime.tv_sec = (time_t)sec;
06553991 374 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 375 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
376 return nfserr_inval;
377 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
378 break;
379 case NFS4_SET_TO_SERVER_TIME:
380 iattr->ia_valid |= ATTR_ATIME;
381 break;
382 default:
383 goto xdr_error;
384 }
385 }
1da177e4
LT		 386 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
387 READ_BUF(4);
388 len += 4;
06553991 389 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 390 switch (dummy32) {
391 case NFS4_SET_TO_CLIENT_TIME:
392 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
393 all 32 bits of 'nseconds'. */
394 READ_BUF(12);
395 len += 12;
542d1ab3
BF		 396 p = xdr_decode_hyper(p, &sec);
397 iattr->ia_mtime.tv_sec = sec;
06553991 398 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 399 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
400 return nfserr_inval;
401 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
402 break;
403 case NFS4_SET_TO_SERVER_TIME:
404 iattr->ia_valid |= ATTR_MTIME;
405 break;
406 default:
407 goto xdr_error;
408 }
409 }
18032ca0
DQ		 410
411 label->len = 0;
412#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
413 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
414 READ_BUF(4);
415 len += 4;
06553991 416 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 417 READ_BUF(4);
418 len += 4;
06553991 419 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 420 READ_BUF(4);
421 len += 4;
06553991 422 dummy32 = be32_to_cpup(p++);
18032ca0
DQ		 423 READ_BUF(dummy32);
424 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
425 return nfserr_badlabel;
426 len += (XDR_QUADLEN(dummy32) << 2);
427 READMEM(buf, dummy32);
29c353b3
BF		 428 label->len = dummy32;
429 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 430 if (!label->data)
431 return nfserr_jukebox;
18032ca0
DQ		 432 }
433#endif
434
3c8e0316
YZ		 435 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
436 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
437 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
438 READ_BUF(expected_len - len);
439 else if (len != expected_len)
1da177e4
LT		 440 goto xdr_error;
441
442 DECODE_TAIL;
1da177e4
LT		 443}
444
e31a1b66
BH		 445static __be32
446nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
447{
448 DECODE_HEAD;
449
450 READ_BUF(sizeof(stateid_t));
06553991 451 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 452 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
453
454 DECODE_TAIL;
455}
456
b37ad28b 457static __be32
1da177e4
LT		 458nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
459{
460 DECODE_HEAD;
461
462 READ_BUF(4);
06553991 463 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 464
465 DECODE_TAIL;
466}
467
acb2887e
BF		 468static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
469{
470 DECODE_HEAD;
12fc3e92 471 u32 dummy, uid, gid;
acb2887e
BF		 472 char *machine_name;
473 int i;
474 int nr_secflavs;
475
476 /* callback_sec_params4 */
477 READ_BUF(4);
06553991 478 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 479 if (nr_secflavs)
480 cbs->flavor = (u32)(-1);
481 else
482 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
483 cbs->flavor = 0;
acb2887e
BF		 484 for (i = 0; i < nr_secflavs; ++i) {
485 READ_BUF(4);
06553991 486 dummy = be32_to_cpup(p++);
acb2887e
BF		 487 switch (dummy) {
488 case RPC_AUTH_NULL:
489 /* Nothing to read */
12fc3e92
BF		 490 if (cbs->flavor == (u32)(-1))
491 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 492 break;
493 case RPC_AUTH_UNIX:
494 READ_BUF(8);
495 /* stamp */
06553991 496 dummy = be32_to_cpup(p++);
acb2887e
BF		 497
498 /* machine name */
06553991 499 dummy = be32_to_cpup(p++);
acb2887e
BF		 500 READ_BUF(dummy);
501 SAVEMEM(machine_name, dummy);
502
503 /* uid, gid */
504 READ_BUF(8);
06553991
BF		 505 uid = be32_to_cpup(p++);
506 gid = be32_to_cpup(p++);
acb2887e
BF		 507
508 /* more gids */
509 READ_BUF(4);
06553991 510 dummy = be32_to_cpup(p++);
acb2887e 511 READ_BUF(dummy * 4);
12fc3e92 512 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 513 kuid_t kuid = make_kuid(&init_user_ns, uid);
514 kgid_t kgid = make_kgid(&init_user_ns, gid);
515 if (uid_valid(kuid) && gid_valid(kgid)) {
516 cbs->uid = kuid;
517 cbs->gid = kgid;
518 cbs->flavor = RPC_AUTH_UNIX;
519 } else {
520 dprintk("RPC_AUTH_UNIX with invalid"
521 "uid or gid ignoring!\n");
522 }
12fc3e92 523 }
acb2887e
BF		 524 break;
525 case RPC_AUTH_GSS:
526 dprintk("RPC_AUTH_GSS callback secflavor "
527 "not supported!\n");
528 READ_BUF(8);
529 /* gcbp_service */
06553991 530 dummy = be32_to_cpup(p++);
acb2887e 531 /* gcbp_handle_from_server */
06553991 532 dummy = be32_to_cpup(p++);
acb2887e
BF		 533 READ_BUF(dummy);
534 p += XDR_QUADLEN(dummy);
535 /* gcbp_handle_from_client */
536 READ_BUF(4);
06553991 537 dummy = be32_to_cpup(p++);
acb2887e
BF		 538 READ_BUF(dummy);
539 break;
540 default:
541 dprintk("Illegal callback secflavor\n");
542 return nfserr_inval;
543 }
544 }
545 DECODE_TAIL;
546}
547
cb73a9f4
BF		 548static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
549{
550 DECODE_HEAD;
551
552 READ_BUF(4);
06553991 553 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 554 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
555
556 DECODE_TAIL;
557}
558
1d1bc8f2
BF		 559static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
560{
561 DECODE_HEAD;
1d1bc8f2
BF		 562
563 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
564 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 565 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 566 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
567 * could help us figure out we should be using it. */
1d1bc8f2
BF		 568 DECODE_TAIL;
569}
570
b37ad28b 571static __be32
1da177e4
LT		 572nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
573{
574 DECODE_HEAD;
575
e31a1b66 576 READ_BUF(4);
06553991 577 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 578 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 579
580 DECODE_TAIL;
581}
582
583
b37ad28b 584static __be32
1da177e4
LT		 585nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
586{
587 DECODE_HEAD;
588
589 READ_BUF(12);
542d1ab3 590 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 591 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 592
593 DECODE_TAIL;
594}
595
b37ad28b 596static __be32
1da177e4
LT		 597nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
598{
599 DECODE_HEAD;
600
601 READ_BUF(4);
06553991 602 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 603 switch (create->cr_type) {
604 case NF4LNK:
605 READ_BUF(4);
7fb84306
BF		 606 create->cr_datalen = be32_to_cpup(p++);
607 READ_BUF(create->cr_datalen);
29c353b3 608 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 609 if (!create->cr_data)
b829e919 610 return nfserr_jukebox;
1da177e4
LT		 611 break;
612 case NF4BLK:
613 case NF4CHR:
614 READ_BUF(8);
06553991
BF		 615 create->cr_specdata1 = be32_to_cpup(p++);
616 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 617 break;
618 case NF4SOCK:
619 case NF4FIFO:
620 case NF4DIR:
621 default:
622 break;
623 }
624
625 READ_BUF(4);
06553991 626 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 627 READ_BUF(create->cr_namelen);
628 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 629 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 630 return status;
631
3c8e0316 632 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 633 &create->cr_acl, &create->cr_label);
c0d6fc8a 634 if (status)
1da177e4
LT		 635 goto out;
636
637 DECODE_TAIL;
638}
639
b37ad28b 640static inline __be32
1da177e4
LT		 641nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
642{
e31a1b66 643 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 644}
645
b37ad28b 646static inline __be32
1da177e4
LT		 647nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
648{
649 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
650}
651
b37ad28b 652static __be32
1da177e4
LT		 653nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
654{
655 DECODE_HEAD;
656
657 READ_BUF(4);
06553991 658 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 659 READ_BUF(link->li_namelen);
660 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 661 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 662 return status;
663
664 DECODE_TAIL;
665}
666
b37ad28b 667static __be32
1da177e4
LT		 668nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
669{
670 DECODE_HEAD;
671
1da177e4
LT		 672 /*
673 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
674 */
675 READ_BUF(28);
06553991 676 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 677 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
678 goto xdr_error;
06553991 679 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 680 p = xdr_decode_hyper(p, &lock->lk_offset);
681 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 682 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 683
684 if (lock->lk_is_new) {
e31a1b66 685 READ_BUF(4);
06553991 686 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 687 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
688 if (status)
689 return status;
690 READ_BUF(8 + sizeof(clientid_t));
06553991 691 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 692 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 693 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 694 READ_BUF(lock->lk_new_owner.len);
695 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
696 } else {
e31a1b66
BH		 697 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
698 if (status)
699 return status;
700 READ_BUF(4);
06553991 701 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 702 }
703
704 DECODE_TAIL;
705}
706
b37ad28b 707static __be32
1da177e4
LT		 708nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
709{
710 DECODE_HEAD;
711
712 READ_BUF(32);
06553991 713 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 714 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
715 goto xdr_error;
542d1ab3
BF		 716 p = xdr_decode_hyper(p, &lockt->lt_offset);
717 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 718 COPYMEM(&lockt->lt_clientid, 8);
06553991 719 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 720 READ_BUF(lockt->lt_owner.len);
721 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
722
723 DECODE_TAIL;
724}
725
b37ad28b 726static __be32
1da177e4
LT		 727nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
728{
729 DECODE_HEAD;
730
e31a1b66 731 READ_BUF(8);
06553991 732 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 733 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
734 goto xdr_error;
06553991 735 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 736 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
737 if (status)
738 return status;
739 READ_BUF(16);
542d1ab3
BF		 740 p = xdr_decode_hyper(p, &locku->lu_offset);
741 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 742
743 DECODE_TAIL;
744}
745
b37ad28b 746static __be32
1da177e4
LT		 747nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
748{
749 DECODE_HEAD;
750
751 READ_BUF(4);
06553991 752 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 753 READ_BUF(lookup->lo_len);
754 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 755 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 756 return status;
757
758 DECODE_TAIL;
759}
760
2c8bd7e0 761static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 762{
763 __be32 *p;
764 u32 w;
765
766 READ_BUF(4);
06553991 767 w = be32_to_cpup(p++);
2c8bd7e0
BH		 768 *share_access = w & NFS4_SHARE_ACCESS_MASK;
769 *deleg_want = w & NFS4_SHARE_WANT_MASK;
770 if (deleg_when)
771 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
772
04f9e664
BF		 773 switch (w & NFS4_SHARE_ACCESS_MASK) {
774 case NFS4_SHARE_ACCESS_READ:
775 case NFS4_SHARE_ACCESS_WRITE:
776 case NFS4_SHARE_ACCESS_BOTH:
777 break;
778 default:
779 return nfserr_bad_xdr;
780 }
fc0d14fe 781 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 782 if (!w)
783 return nfs_ok;
784 if (!argp->minorversion)
785 return nfserr_bad_xdr;
786 switch (w & NFS4_SHARE_WANT_MASK) {
787 case NFS4_SHARE_WANT_NO_PREFERENCE:
788 case NFS4_SHARE_WANT_READ_DELEG:
789 case NFS4_SHARE_WANT_WRITE_DELEG:
790 case NFS4_SHARE_WANT_ANY_DELEG:
791 case NFS4_SHARE_WANT_NO_DELEG:
792 case NFS4_SHARE_WANT_CANCEL:
793 break;
794 default:
795 return nfserr_bad_xdr;
796 }
92bac8c5 797 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 798 if (!w)
799 return nfs_ok;
2c8bd7e0
BH		 800
801 if (!deleg_when) /* open_downgrade */
802 return nfserr_inval;
04f9e664
BF		 803 switch (w) {
804 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
805 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 806 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
807 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 808 return nfs_ok;
809 }
810xdr_error:
811 return nfserr_bad_xdr;
812}
813
814static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
815{
816 __be32 *p;
817
818 READ_BUF(4);
06553991 819 *x = be32_to_cpup(p++);
04f9e664 820 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 821 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 822 return nfserr_bad_xdr;
823 return nfs_ok;
824xdr_error:
825 return nfserr_bad_xdr;
826}
827
a084daf5
BF		 828static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
829{
830 __be32 *p;
831
832 READ_BUF(4);
06553991 833 o->len = be32_to_cpup(p++);
a084daf5
BF		 834
835 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
836 return nfserr_bad_xdr;
837
838 READ_BUF(o->len);
839 SAVEMEM(o->data, o->len);
840 return nfs_ok;
841xdr_error:
842 return nfserr_bad_xdr;
843}
844
b37ad28b 845static __be32
1da177e4
LT		 846nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
847{
848 DECODE_HEAD;
2c8bd7e0 849 u32 dummy;
1da177e4
LT		 850
851 memset(open->op_bmval, 0, sizeof(open->op_bmval));
852 open->op_iattr.ia_valid = 0;
fe0750e5 853 open->op_openowner = NULL;
1da177e4 854
9d313b17 855 open->op_xdr_error = 0;
1da177e4 856 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 857 READ_BUF(4);
06553991 858 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 859 /* decode, yet ignore deleg_when until supported */
860 status = nfsd4_decode_share_access(argp, &open->op_share_access,
861 &open->op_deleg_want, &dummy);
04f9e664
BF		 862 if (status)
863 goto xdr_error;
864 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
865 if (status)
866 goto xdr_error;
a084daf5 867 READ_BUF(sizeof(clientid_t));
1da177e4 868 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 869 status = nfsd4_decode_opaque(argp, &open->op_owner);
870 if (status)
871 goto xdr_error;
872 READ_BUF(4);
06553991 873 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 874 switch (open->op_create) {
875 case NFS4_OPEN_NOCREATE:
876 break;
877 case NFS4_OPEN_CREATE:
878 READ_BUF(4);
06553991 879 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 880 switch (open->op_createmode) {
881 case NFS4_CREATE_UNCHECKED:
882 case NFS4_CREATE_GUARDED:
c0d6fc8a 883 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 884 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 885 if (status)
1da177e4
LT		 886 goto out;
887 break;
888 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 889 READ_BUF(NFS4_VERIFIER_SIZE);
890 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 891 break;
79fb54ab
BH		 892 case NFS4_CREATE_EXCLUSIVE4_1:
893 if (argp->minorversion < 1)
894 goto xdr_error;
ab4684d1
CL		 895 READ_BUF(NFS4_VERIFIER_SIZE);
896 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 897 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 898 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 899 if (status)
900 goto out;
901 break;
1da177e4
LT		 902 default:
903 goto xdr_error;
904 }
905 break;
906 default:
907 goto xdr_error;
908 }
909
910 /* open_claim */
911 READ_BUF(4);
06553991 912 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 913 switch (open->op_claim_type) {
914 case NFS4_OPEN_CLAIM_NULL:
915 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
916 READ_BUF(4);
06553991 917 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 918 READ_BUF(open->op_fname.len);
919 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 920 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 921 return status;
922 break;
923 case NFS4_OPEN_CLAIM_PREVIOUS:
924 READ_BUF(4);
06553991 925 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 926 break;
927 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 928 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
929 if (status)
930 return status;
931 READ_BUF(4);
06553991 932 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 933 READ_BUF(open->op_fname.len);
934 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 935 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 936 return status;
937 break;
8b289b2c
BF		 938 case NFS4_OPEN_CLAIM_FH:
939 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 /* void */
943 break;
944 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
945 if (argp->minorversion < 1)
946 goto xdr_error;
947 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
948 if (status)
949 return status;
950 break;
1da177e4
LT		 951 default:
952 goto xdr_error;
953 }
954
955 DECODE_TAIL;
956}
957
b37ad28b 958static __be32
1da177e4
LT		 959nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
960{
961 DECODE_HEAD;
e1a90ebd
AS		 962
963 if (argp->minorversion >= 1)
964 return nfserr_notsupp;
965
e31a1b66
BH		 966 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
967 if (status)
968 return status;
969 READ_BUF(4);
06553991 970 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 971
1da177e4
LT		 972 DECODE_TAIL;
973}
974
b37ad28b 975static __be32
1da177e4
LT		 976nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
977{
978 DECODE_HEAD;
979
e31a1b66
BH		 980 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
981 if (status)
982 return status;
04f9e664 983 READ_BUF(4);
06553991 984 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 985 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
986 &open_down->od_deleg_want, NULL);
04f9e664
BF		 987 if (status)
988 return status;
989 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
990 if (status)
991 return status;
1da177e4
LT		 992 DECODE_TAIL;
993}
994
b37ad28b 995static __be32
1da177e4
LT		 996nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
997{
998 DECODE_HEAD;
999
1000 READ_BUF(4);
06553991 1001 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1002 if (putfh->pf_fhlen > NFS4_FHSIZE)
1003 goto xdr_error;
1004 READ_BUF(putfh->pf_fhlen);
1005 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1006
1007 DECODE_TAIL;
1008}
1009
e1a90ebd
AS		 1010static __be32
1011nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1012{
1013 if (argp->minorversion == 0)
1014 return nfs_ok;
1015 return nfserr_notsupp;
1016}
1017
b37ad28b 1018static __be32
1da177e4
LT		 1019nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1020{
1021 DECODE_HEAD;
1022
e31a1b66
BH		 1023 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1024 if (status)
1025 return status;
1026 READ_BUF(12);
542d1ab3 1027 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1028 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1029
1030 DECODE_TAIL;
1031}
1032
b37ad28b 1033static __be32
1da177e4
LT		 1034nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1035{
1036 DECODE_HEAD;
1037
1038 READ_BUF(24);
542d1ab3 1039 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1040 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1041 readdir->rd_dircount = be32_to_cpup(p++);
1042 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1043 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1044 goto out;
1045
1046 DECODE_TAIL;
1047}
1048
b37ad28b 1049static __be32
1da177e4
LT		 1050nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1051{
1052 DECODE_HEAD;
1053
1054 READ_BUF(4);
06553991 1055 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1056 READ_BUF(remove->rm_namelen);
1057 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1058 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1059 return status;
1060
1061 DECODE_TAIL;
1062}
1063
b37ad28b 1064static __be32
1da177e4
LT		 1065nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1066{
1067 DECODE_HEAD;
1068
1069 READ_BUF(4);
06553991 1070 rename->rn_snamelen = be32_to_cpup(p++);
1da177e4
LT		 1071 READ_BUF(rename->rn_snamelen + 4);
1072 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
06553991 1073 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1074 READ_BUF(rename->rn_tnamelen);
1075 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1076 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1077 return status;
a36b1725 1078 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1079 return status;
1080
1081 DECODE_TAIL;
1082}
1083
b37ad28b 1084static __be32
1da177e4
LT		 1085nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1086{
1087 DECODE_HEAD;
1088
e1a90ebd
AS		 1089 if (argp->minorversion >= 1)
1090 return nfserr_notsupp;
1091
1da177e4
LT		 1092 READ_BUF(sizeof(clientid_t));
1093 COPYMEM(clientid, sizeof(clientid_t));
1094
1095 DECODE_TAIL;
1096}
1097
dcb488a3
AA		 1098static __be32
1099nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1100 struct nfsd4_secinfo *secinfo)
1101{
1102 DECODE_HEAD;
1103
1104 READ_BUF(4);
06553991 1105 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1106 READ_BUF(secinfo->si_namelen);
1107 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1108 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1109 if (status)
1110 return status;
1111 DECODE_TAIL;
1112}
1113
04f4ad16
BF		 1114static __be32
1115nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1116 struct nfsd4_secinfo_no_name *sin)
1117{
1118 DECODE_HEAD;
1119
1120 READ_BUF(4);
06553991 1121 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1122 DECODE_TAIL;
1123}
1124
b37ad28b 1125static __be32
1da177e4
LT		 1126nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1127{
e31a1b66 1128 __be32 status;
1da177e4 1129
e31a1b66
BH		 1130 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1131 if (status)
1132 return status;
3c8e0316 1133 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1134 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1135}
1136
b37ad28b 1137static __be32
1da177e4
LT		 1138nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1139{
1140 DECODE_HEAD;
1141
e1a90ebd
AS		 1142 if (argp->minorversion >= 1)
1143 return nfserr_notsupp;
1144
ab4684d1
CL		 1145 READ_BUF(NFS4_VERIFIER_SIZE);
1146 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1147
a084daf5
BF		 1148 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1149 if (status)
1150 return nfserr_bad_xdr;
1151 READ_BUF(8);
06553991
BF		 1152 setclientid->se_callback_prog = be32_to_cpup(p++);
1153 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1da177e4
LT		 1154
1155 READ_BUF(setclientid->se_callback_netid_len + 4);
1156 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
06553991 1157 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4
LT		 1158
1159 READ_BUF(setclientid->se_callback_addr_len + 4);
1160 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
06553991 1161 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1162
1163 DECODE_TAIL;
1164}
1165
b37ad28b 1166static __be32
1da177e4
LT		 1167nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1168{
1169 DECODE_HEAD;
1170
e1a90ebd
AS		 1171 if (argp->minorversion >= 1)
1172 return nfserr_notsupp;
1173
ab4684d1 1174 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1175 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1176 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1177
1178 DECODE_TAIL;
1179}
1180
1181/* Also used for NVERIFY */
b37ad28b 1182static __be32
1da177e4
LT		 1183nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1184{
1da177e4
LT		 1185 DECODE_HEAD;
1186
1187 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1188 goto out;
1189
1190 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1191 * nfsd4_proc_verify */
1192
1da177e4 1193 READ_BUF(4);
06553991 1194 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1195 READ_BUF(verify->ve_attrlen);
1196 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1197
1198 DECODE_TAIL;
1199}
1200
b37ad28b 1201static __be32
1da177e4
LT		 1202nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1203{
1204 int avail;
1da177e4
LT		 1205 int len;
1206 DECODE_HEAD;
1207
e31a1b66
BH		 1208 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1209 if (status)
1210 return status;
1211 READ_BUF(16);
542d1ab3 1212 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1213 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1214 if (write->wr_stable_how > 2)
1215 goto xdr_error;
06553991 1216 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1217
1218 /* Sorry .. no magic macros for this.. *
1219 * READ_BUF(write->wr_buflen);
1220 * SAVEMEM(write->wr_buf, write->wr_buflen);
1221 */
1222 avail = (char*)argp->end - (char*)argp->p;
1223 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1224 dprintk("NFSD: xdr error (%s:%d)\n",
1225 __FILE__, __LINE__);
1da177e4
LT		 1226 goto xdr_error;
1227 }
70cc7f75
BF		 1228 write->wr_head.iov_base = p;
1229 write->wr_head.iov_len = avail;
70cc7f75 1230 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1231
1232 len = XDR_QUADLEN(write->wr_buflen) << 2;
1233 if (len >= avail) {
1234 int pages;
1235
1236 len -= avail;
1237
1238 pages = len >> PAGE_SHIFT;
1239 argp->pagelist += pages;
1240 argp->pagelen -= pages * PAGE_SIZE;
1241 len -= pages * PAGE_SIZE;
1242
1243 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1244 argp->pagelist++;
5a80a54d 1245 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1246 }
5a80a54d 1247 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1248
1249 DECODE_TAIL;
1250}
1251
b37ad28b 1252static __be32
1da177e4
LT		 1253nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1254{
1255 DECODE_HEAD;
1256
e1a90ebd
AS		 1257 if (argp->minorversion >= 1)
1258 return nfserr_notsupp;
1259
1da177e4
LT		 1260 READ_BUF(12);
1261 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1262 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1263 READ_BUF(rlockowner->rl_owner.len);
1264 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1265
60adfc50
AA		 1266 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1267 return nfserr_inval;
1da177e4
LT		 1268 DECODE_TAIL;
1269}
1270
2db134eb
AA		 1271static __be32
1272nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1273 struct nfsd4_exchange_id *exid)
2db134eb 1274{
5afa040b 1275 int dummy, tmp;
0733d213
AA		 1276 DECODE_HEAD;
1277
1278 READ_BUF(NFS4_VERIFIER_SIZE);
1279 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1280
a084daf5
BF		 1281 status = nfsd4_decode_opaque(argp, &exid->clname);
1282 if (status)
1283 return nfserr_bad_xdr;
0733d213
AA		 1284
1285 READ_BUF(4);
06553991 1286 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1287
1288 /* Ignore state_protect4_a */
1289 READ_BUF(4);
06553991 1290 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1291 switch (exid->spa_how) {
1292 case SP4_NONE:
1293 break;
1294 case SP4_MACH_CRED:
1295 /* spo_must_enforce */
1296 READ_BUF(4);
06553991 1297 dummy = be32_to_cpup(p++);
0733d213
AA		 1298 READ_BUF(dummy * 4);
1299 p += dummy;
1300
1301 /* spo_must_allow */
1302 READ_BUF(4);
06553991 1303 dummy = be32_to_cpup(p++);
0733d213
AA		 1304 READ_BUF(dummy * 4);
1305 p += dummy;
1306 break;
1307 case SP4_SSV:
1308 /* ssp_ops */
1309 READ_BUF(4);
06553991 1310 dummy = be32_to_cpup(p++);
0733d213
AA		 1311 READ_BUF(dummy * 4);
1312 p += dummy;
1313
1314 READ_BUF(4);
06553991 1315 dummy = be32_to_cpup(p++);
0733d213
AA		 1316 READ_BUF(dummy * 4);
1317 p += dummy;
1318
1319 /* ssp_hash_algs<> */
1320 READ_BUF(4);
06553991 1321 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1322 while (tmp--) {
1323 READ_BUF(4);
06553991 1324 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1325 READ_BUF(dummy);
1326 p += XDR_QUADLEN(dummy);
1327 }
0733d213
AA		 1328
1329 /* ssp_encr_algs<> */
1330 READ_BUF(4);
06553991 1331 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1332 while (tmp--) {
1333 READ_BUF(4);
06553991 1334 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1335 READ_BUF(dummy);
1336 p += XDR_QUADLEN(dummy);
1337 }
0733d213
AA		 1338
1339 /* ssp_window and ssp_num_gss_handles */
1340 READ_BUF(8);
06553991
BF		 1341 dummy = be32_to_cpup(p++);
1342 dummy = be32_to_cpup(p++);
0733d213
AA		 1343 break;
1344 default:
1345 goto xdr_error;
1346 }
1347
1348 /* Ignore Implementation ID */
1349 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1350 dummy = be32_to_cpup(p++);
0733d213
AA		 1351
1352 if (dummy > 1)
1353 goto xdr_error;
1354
1355 if (dummy == 1) {
1356 /* nii_domain */
1357 READ_BUF(4);
06553991 1358 dummy = be32_to_cpup(p++);
0733d213
AA		 1359 READ_BUF(dummy);
1360 p += XDR_QUADLEN(dummy);
1361
1362 /* nii_name */
1363 READ_BUF(4);
06553991 1364 dummy = be32_to_cpup(p++);
0733d213
AA		 1365 READ_BUF(dummy);
1366 p += XDR_QUADLEN(dummy);
1367
1368 /* nii_date */
1369 READ_BUF(12);
1370 p += 3;
1371 }
1372 DECODE_TAIL;
2db134eb
AA		 1373}
1374
1375static __be32
1376nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1377 struct nfsd4_create_session *sess)
1378{
ec6b5d7b 1379 DECODE_HEAD;
ec6b5d7b 1380 u32 dummy;
ec6b5d7b
AA		 1381
1382 READ_BUF(16);
1383 COPYMEM(&sess->clientid, 8);
06553991
BF		 1384 sess->seqid = be32_to_cpup(p++);
1385 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1386
1387 /* Fore channel attrs */
1388 READ_BUF(28);
06553991
BF		 1389 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1390 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1391 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1392 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1393 sess->fore_channel.maxops = be32_to_cpup(p++);
1394 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1395 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1396 if (sess->fore_channel.nr_rdma_attrs == 1) {
1397 READ_BUF(4);
06553991 1398 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1399 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1400 dprintk("Too many fore channel attr bitmaps!\n");
1401 goto xdr_error;
1402 }
1403
1404 /* Back channel attrs */
1405 READ_BUF(28);
06553991
BF		 1406 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1407 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1408 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1409 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1410 sess->back_channel.maxops = be32_to_cpup(p++);
1411 sess->back_channel.maxreqs = be32_to_cpup(p++);
1412 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1413 if (sess->back_channel.nr_rdma_attrs == 1) {
1414 READ_BUF(4);
06553991 1415 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1416 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1417 dprintk("Too many back channel attr bitmaps!\n");
1418 goto xdr_error;
1419 }
1420
acb2887e 1421 READ_BUF(4);
06553991 1422 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1423 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1424 DECODE_TAIL;
2db134eb
AA		 1425}
1426
1427static __be32
1428nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1429 struct nfsd4_destroy_session *destroy_session)
1430{
e10e0cfc
BH		 1431 DECODE_HEAD;
1432 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1433 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1434
1435 DECODE_TAIL;
2db134eb
AA		 1436}
1437
e1ca12df
BS		 1438static __be32
1439nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1440 struct nfsd4_free_stateid *free_stateid)
1441{
1442 DECODE_HEAD;
1443
1444 READ_BUF(sizeof(stateid_t));
06553991 1445 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1446 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1447
1448 DECODE_TAIL;
1449}
1450
2db134eb
AA		 1451static __be32
1452nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1453 struct nfsd4_sequence *seq)
1454{
b85d4c01
BH		 1455 DECODE_HEAD;
1456
1457 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1458 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1459 seq->seqid = be32_to_cpup(p++);
1460 seq->slotid = be32_to_cpup(p++);
1461 seq->maxslots = be32_to_cpup(p++);
1462 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1463
1464 DECODE_TAIL;
2db134eb
AA		 1465}
1466
17456804
BS		 1467static __be32
1468nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1469{
17456804 1470 int i;
03cfb420
BS		 1471 __be32 *p, status;
1472 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1473
1474 READ_BUF(4);
1475 test_stateid->ts_num_ids = ntohl(*p++);
1476
03cfb420 1477 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1478
1479 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1480 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1481 if (!stateid) {
afcf6792 1482 status = nfserrno(-ENOMEM);
03cfb420
BS		 1483 goto out;
1484 }
1485
03cfb420
BS		 1486 INIT_LIST_HEAD(&stateid->ts_id_list);
1487 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1488
1489 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1490 if (status)
03cfb420 1491 goto out;
17456804
BS		 1492 }
1493
1494 status = 0;
1495out:
1496 return status;
1497xdr_error:
1498 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1499 status = nfserr_bad_xdr;
1500 goto out;
1501}
1502
345c2842
MJ		 1503static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1504{
1505 DECODE_HEAD;
1506
1507 READ_BUF(8);
1508 COPYMEM(&dc->clientid, 8);
1509
1510 DECODE_TAIL;
1511}
1512
4dc6ec00
BF		 1513static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1514{
1515 DECODE_HEAD;
1516
1517 READ_BUF(4);
06553991 1518 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1519
1520 DECODE_TAIL;
1521}
1522
347e0ad9
BH		 1523static __be32
1524nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1525{
1526 return nfs_ok;
1527}
1528
3c375c6f
BH		 1529static __be32
1530nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1531{
1e685ec2 1532 return nfserr_notsupp;
3c375c6f
BH		 1533}
1534
347e0ad9
BH		 1535typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1536
1537static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1538 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1539 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1540 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1541 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1542 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1543 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1544 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1545 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1546 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1547 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1548 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1549 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1550 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1551 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1552 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1553 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1554 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1555 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1556 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1557 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1558 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1559 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1560 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1561 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1562 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1564 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1565 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1566 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1567 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1568 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1569 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1570 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1571 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1572 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1573 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1574 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1575
1576 /* new operations for NFSv4.1 */
cb73a9f4 1577 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1578 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1579 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1580 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1581 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1582 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1583 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1586 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1587 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1589 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1590 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1591 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1592 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1593 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1594 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1595 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1596};
1597
e1a90ebd
AS		 1598static inline bool
1599nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1600{
8217d146 1601 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1602 return false;
8217d146 1603 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1604 return false;
8217d146
AS		 1605 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1606 return false;
1607 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1608 return false;
1609 return true;
1610}
f2feb96b 1611
b37ad28b 1612static __be32
1da177e4
LT		 1613nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1614{
1615 DECODE_HEAD;
1616 struct nfsd4_op *op;
1091006c 1617 bool cachethis = false;
a5cddc88
BF		 1618 int auth_slack= argp->rqstp->rq_auth_slack;
1619 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1620 int readcount = 0;
1621 int readbytes = 0;
1da177e4
LT		 1622 int i;
1623
1da177e4 1624 READ_BUF(4);
06553991 1625 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1626 READ_BUF(argp->taglen + 8);
1627 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1628 argp->minorversion = be32_to_cpup(p++);
1629 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1630 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1631
1632 if (argp->taglen > NFSD4_MAX_TAGLEN)
1633 goto xdr_error;
1634 if (argp->opcnt > 100)
1635 goto xdr_error;
1636
e8c96f8c 1637 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1638 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1639 if (!argp->ops) {
1640 argp->ops = argp->iops;
817cb9d4 1641 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1642 goto xdr_error;
1643 }
1644 }
1645
e1a90ebd 1646 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1647 argp->opcnt = 0;
1648
1da177e4
LT		 1649 for (i = 0; i < argp->opcnt; i++) {
1650 op = &argp->ops[i];
1651 op->replay = NULL;
1652
8a61b18c 1653 READ_BUF(4);
06553991 1654 op->opnum = be32_to_cpup(p++);
1da177e4 1655
e1a90ebd
AS		 1656 if (nfsd4_opnum_in_range(argp, op))
1657 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1658 else {
1da177e4
LT		 1659 op->opnum = OP_ILLEGAL;
1660 op->status = nfserr_op_illegal;
1da177e4 1661 }
1091006c
BF		 1662 /*
1663 * We'll try to cache the result in the DRC if any one
1664 * op in the compound wants to be cached:
1665 */
1666 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1667
b0e35fda
BF		 1668 if (op->opnum == OP_READ) {
1669 readcount++;
1670 readbytes += nfsd4_max_reply(argp->rqstp, op);
1671 } else
1672 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1673
1674 if (op->status) {
1675 argp->opcnt = i+1;
1676 break;
1677 }
1da177e4 1678 }
1091006c
BF		 1679 /* Sessions make the DRC unnecessary: */
1680 if (argp->minorversion)
1681 cachethis = false;
b0e35fda 1682 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1683 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1684
a5cddc88 1685 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
b0e35fda
BF		 1686 argp->rqstp->rq_splice_ok = false;
1687
1da177e4
LT		 1688 DECODE_TAIL;
1689}
1da177e4 1690
d05d5744 1691static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1692{
1693 if (IS_I_VERSION(inode)) {
d05d5744 1694 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1695 } else {
d05d5744
BF		 1696 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1697 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1698 }
d05d5744 1699 return p;
c654b8a9
BF		 1700}
1701
d05d5744 1702static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1703{
d05d5744 1704 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1705 if (c->change_supported) {
d05d5744
BF		 1706 p = xdr_encode_hyper(p, c->before_change);
1707 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1708 } else {
d05d5744
BF		 1709 *p++ = cpu_to_be32(c->before_ctime_sec);
1710 *p++ = cpu_to_be32(c->before_ctime_nsec);
1711 *p++ = cpu_to_be32(c->after_ctime_sec);
1712 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1713 }
d05d5744 1714 return p;
c654b8a9 1715}
1da177e4 1716
81c3f413 1717/* Encode as an array of strings the string given with components
e7a0444a 1718 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1719 */
ddd1ea56
BF		 1720static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1721 char *components, char esc_enter,
1722 char esc_exit)
81c3f413 1723{
ddd1ea56 1724 __be32 *p;
082d4bd7
BF		 1725 __be32 pathlen;
1726 int pathlen_offset;
81c3f413 1727 int strlen, count=0;
e7a0444a 1728 char *str, *end, *next;
81c3f413
BF		 1729
1730 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1731
1732 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1733 p = xdr_reserve_space(xdr, 4);
1734 if (!p)
81c3f413 1735 return nfserr_resource;
082d4bd7
BF		 1736 p++; /* We will fill this in with @count later */
1737
81c3f413
BF		 1738 end = str = components;
1739 while (*end) {
e7a0444a
WAA		 1740 bool found_esc = false;
1741
1742 /* try to parse as esc_start, ..., esc_end, sep */
1743 if (*str == esc_enter) {
1744 for (; *end && (*end != esc_exit); end++)
1745 /* find esc_exit or end of string */;
1746 next = end + 1;
1747 if (*end && (!*next || *next == sep)) {
1748 str++;
1749 found_esc = true;
1750 }
1751 }
1752
1753 if (!found_esc)
1754 for (; *end && (*end != sep); end++)
1755 /* find sep or end of string */;
1756
81c3f413
BF		 1757 strlen = end - str;
1758 if (strlen) {
ddd1ea56
BF		 1759 p = xdr_reserve_space(xdr, strlen + 4);
1760 if (!p)
81c3f413 1761 return nfserr_resource;
0c0c267b 1762 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1763 count++;
1764 }
1765 else
1766 end++;
1767 str = end;
1768 }
082d4bd7
BF		 1769 pathlen = htonl(xdr->buf->len - pathlen_offset);
1770 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1771 return 0;
1772}
1773
e7a0444a
WAA		 1774/* Encode as an array of strings the string given with components
1775 * separated @sep.
1776 */
ddd1ea56
BF		 1777static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1778 char *components)
e7a0444a 1779{
ddd1ea56 1780 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1781}
1782
81c3f413
BF		 1783/*
1784 * encode a location element of a fs_locations structure
1785 */
ddd1ea56
BF		 1786static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1787 struct nfsd4_fs_location *location)
81c3f413 1788{
b37ad28b 1789 __be32 status;
81c3f413 1790
ddd1ea56 1791 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1792 '[', ']');
81c3f413
BF		 1793 if (status)
1794 return status;
ddd1ea56 1795 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1796 if (status)
1797 return status;
81c3f413
BF		 1798 return 0;
1799}
1800
1801/*
ed748aac 1802 * Encode a path in RFC3530 'pathname4' format
81c3f413 1803 */
ddd1ea56
BF		 1804static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1805 const struct path *root,
1806 const struct path *path)
81c3f413 1807{
301f0268 1808 struct path cur = *path;
ddd1ea56 1809 __be32 *p;
ed748aac
TM		 1810 struct dentry **components = NULL;
1811 unsigned int ncomponents = 0;
1812 __be32 err = nfserr_jukebox;
81c3f413 1813
ed748aac 1814 dprintk("nfsd4_encode_components(");
81c3f413 1815
ed748aac
TM		 1816 path_get(&cur);
1817 /* First walk the path up to the nfsd root, and store the
1818 * dentries/path components in an array.
1819 */
1820 for (;;) {
1821 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1822 break;
1823 if (cur.dentry == cur.mnt->mnt_root) {
1824 if (follow_up(&cur))
1825 continue;
1826 goto out_free;
1827 }
1828 if ((ncomponents & 15) == 0) {
1829 struct dentry **new;
1830 new = krealloc(components,
1831 sizeof(*new) * (ncomponents + 16),
1832 GFP_KERNEL);
1833 if (!new)
1834 goto out_free;
1835 components = new;
1836 }
1837 components[ncomponents++] = cur.dentry;
1838 cur.dentry = dget_parent(cur.dentry);
1839 }
ddd1ea56
BF		 1840 err = nfserr_resource;
1841 p = xdr_reserve_space(xdr, 4);
1842 if (!p)
ed748aac 1843 goto out_free;
c373b0a4 1844 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1845
1846 while (ncomponents) {
1847 struct dentry *dentry = components[ncomponents - 1];
301f0268 1848 unsigned int len;
ed748aac 1849
301f0268
AV		 1850 spin_lock(&dentry->d_lock);
1851 len = dentry->d_name.len;
ddd1ea56
BF		 1852 p = xdr_reserve_space(xdr, len + 4);
1853 if (!p) {
301f0268 1854 spin_unlock(&dentry->d_lock);
ed748aac 1855 goto out_free;
301f0268 1856 }
0c0c267b 1857 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1858 dprintk("/%s", dentry->d_name.name);
301f0268 1859 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1860 dput(dentry);
1861 ncomponents--;
81c3f413 1862 }
ed748aac 1863
ed748aac
TM		 1864 err = 0;
1865out_free:
1866 dprintk(")\n");
1867 while (ncomponents)
1868 dput(components[--ncomponents]);
1869 kfree(components);
1870 path_put(&cur);
1871 return err;
1872}
1873
ddd1ea56
BF		 1874static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1875 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1876{
1877 struct svc_export *exp_ps;
1878 __be32 res;
1879
1880 exp_ps = rqst_find_fsidzero_export(rqstp);
1881 if (IS_ERR(exp_ps))
1882 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1883 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1884 exp_put(exp_ps);
1885 return res;
81c3f413
BF		 1886}
1887
1888/*
1889 * encode a fs_locations structure
1890 */
ddd1ea56
BF		 1891static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1892 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1893{
b37ad28b 1894 __be32 status;
cc45f017 1895 int i;
ddd1ea56 1896 __be32 *p;
81c3f413 1897 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1898
ddd1ea56 1899 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1900 if (status)
1901 return status;
ddd1ea56
BF		 1902 p = xdr_reserve_space(xdr, 4);
1903 if (!p)
81c3f413 1904 return nfserr_resource;
c373b0a4 1905 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1906 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1907 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1908 if (status)
1909 return status;
1910 }
81c3f413
BF		 1911 return 0;
1912}
1da177e4 1913
3d2544b1
BF		 1914static u32 nfs4_file_type(umode_t mode)
1915{
1916 switch (mode & S_IFMT) {
1917 case S_IFIFO: return NF4FIFO;
1918 case S_IFCHR: return NF4CHR;
1919 case S_IFDIR: return NF4DIR;
1920 case S_IFBLK: return NF4BLK;
1921 case S_IFLNK: return NF4LNK;
1922 case S_IFREG: return NF4REG;
1923 case S_IFSOCK: return NF4SOCK;
1924 default: return NF4BAD;
1925 };
1926}
1da177e4 1927
b37ad28b 1928static inline __be32
ddd1ea56
BF		 1929nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1930 struct nfs4_ace *ace)
1da177e4 1931{
3554116d 1932 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1933 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1934 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1935 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1936 else
ddd1ea56 1937 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1938}
1939
42ca0993
BF		 1940#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1941 FATTR4_WORD0_RDATTR_ERROR)
1942#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1943
18032ca0
DQ		 1944#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1945static inline __be32
ddd1ea56
BF		 1946nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1947 void *context, int len)
18032ca0 1948{
ddd1ea56 1949 __be32 *p;
18032ca0 1950
ddd1ea56
BF		 1951 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1952 if (!p)
18032ca0
DQ		 1953 return nfserr_resource;
1954
1955 /*
1956 * For now we use a 0 here to indicate the null translation; in
1957 * the future we may place a call to translation code here.
1958 */
c373b0a4
BF		 1959 *p++ = cpu_to_be32(0); /* lfs */
1960 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1961 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1962 return 0;
1963}
1964#else
1965static inline __be32
ddd1ea56
BF		 1966nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1967 void *context, int len)
18032ca0
DQ		 1968{ return 0; }
1969#endif
1970
b37ad28b 1971static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1972{
1973 /* As per referral draft: */
1974 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1975 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1976 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1977 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1978 *rdattr_err = NFSERR_MOVED;
1979 else
1980 return nfserr_moved;
1981 }
1982 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1983 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1984 return 0;
1985}
1da177e4 1986
ae7095a7
BF		 1987
1988static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1989{
1990 struct path path = exp->ex_path;
1991 int err;
1992
1993 path_get(&path);
1994 while (follow_up(&path)) {
1995 if (path.dentry != path.mnt->mnt_root)
1996 break;
1997 }
3dadecce 1998 err = vfs_getattr(&path, stat);
ae7095a7
BF		 1999 path_put(&path);
2000 return err;
2001}
2002
1da177e4
LT		 2003/*
2004 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2005 * ourselves.
1da177e4 2006 */
da2ebce6 2007static __be32
d5184658
BF		 2008nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2009 struct svc_export *exp,
2010 struct dentry *dentry, u32 *bmval,
406a7ea9 2011 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2012{
2013 u32 bmval0 = bmval[0];
2014 u32 bmval1 = bmval[1];
7e705706 2015 u32 bmval2 = bmval[2];
1da177e4 2016 struct kstat stat;
d50e6136 2017 struct svc_fh *tempfh = NULL;
1da177e4 2018 struct kstatfs statfs;
ddd1ea56 2019 __be32 *p;
1fcea5b2 2020 int starting_len = xdr->buf->len;
082d4bd7
BF		 2021 int attrlen_offset;
2022 __be32 attrlen;
1da177e4
LT		 2023 u32 dummy;
2024 u64 dummy64;
42ca0993 2025 u32 rdattr_err = 0;
b37ad28b 2026 __be32 status;
b8dd7b9a 2027 int err;
1da177e4
LT		 2028 int aclsupport = 0;
2029 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2030 void *context = NULL;
2031 int contextlen;
2032 bool contextsupport = false;
7e705706
AA		 2033 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2034 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2035 struct path path = {
2036 .mnt = exp->ex_path.mnt,
2037 .dentry = dentry,
2038 };
3d733711 2039 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2040
2041 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2042 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2043 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2044 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2045
42ca0993 2046 if (exp->ex_fslocs.migrated) {
7e705706 2047 BUG_ON(bmval[2]);
42ca0993
BF		 2048 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2049 if (status)
2050 goto out;
2051 }
2052
3dadecce 2053 err = vfs_getattr(&path, &stat);
b8dd7b9a 2054 if (err)
1da177e4 2055 goto out_nfserr;
12337901
CH		 2056 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2057 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2058 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2059 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2060 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2061 if (err)
1da177e4
LT		 2062 goto out_nfserr;
2063 }
2064 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2065 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2066 status = nfserr_jukebox;
2067 if (!tempfh)
2068 goto out;
2069 fh_init(tempfh, NFS4_FHSIZE);
2070 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2071 if (status)
2072 goto out;
d50e6136 2073 fhp = tempfh;
1da177e4
LT		 2074 }
2075 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2076 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2077 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2078 aclsupport = (err == 0);
1da177e4 2079 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2080 if (err == -EOPNOTSUPP)
1da177e4 2081 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2082 else if (err == -EINVAL) {
1da177e4
LT		 2083 status = nfserr_attrnotsupp;
2084 goto out;
b8dd7b9a 2085 } else if (err != 0)
1da177e4
LT		 2086 goto out_nfserr;
2087 }
2088 }
1da177e4 2089
18032ca0
DQ		 2090#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2091 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2092 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2093 err = security_inode_getsecctx(dentry->d_inode,
2094 &context, &contextlen);
2095 contextsupport = (err == 0);
2096 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2097 if (err == -EOPNOTSUPP)
2098 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2099 else if (err)
2100 goto out_nfserr;
2101 }
2102 }
2103#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2104
2b44f1ba 2105 if (bmval2) {
ddd1ea56
BF		 2106 p = xdr_reserve_space(xdr, 16);
2107 if (!p)
2b44f1ba 2108 goto out_resource;
c373b0a4
BF		 2109 *p++ = cpu_to_be32(3);
2110 *p++ = cpu_to_be32(bmval0);
2111 *p++ = cpu_to_be32(bmval1);
2112 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2113 } else if (bmval1) {
ddd1ea56
BF		 2114 p = xdr_reserve_space(xdr, 12);
2115 if (!p)
2b44f1ba 2116 goto out_resource;
c373b0a4
BF		 2117 *p++ = cpu_to_be32(2);
2118 *p++ = cpu_to_be32(bmval0);
2119 *p++ = cpu_to_be32(bmval1);
7e705706 2120 } else {
ddd1ea56
BF		 2121 p = xdr_reserve_space(xdr, 8);
2122 if (!p)
2b44f1ba 2123 goto out_resource;
c373b0a4
BF		 2124 *p++ = cpu_to_be32(1);
2125 *p++ = cpu_to_be32(bmval0);
7e705706 2126 }
082d4bd7
BF		 2127
2128 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2129 p = xdr_reserve_space(xdr, 4);
2130 if (!p)
2131 goto out_resource;
082d4bd7 2132 p++; /* to be backfilled later */
1da177e4
LT		 2133
2134 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2135 u32 word0 = nfsd_suppattrs0(minorversion);
2136 u32 word1 = nfsd_suppattrs1(minorversion);
2137 u32 word2 = nfsd_suppattrs2(minorversion);
2138
42ca0993
BF		 2139 if (!aclsupport)
2140 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2141 if (!contextsupport)
2142 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2143 if (!word2) {
ddd1ea56
BF		 2144 p = xdr_reserve_space(xdr, 12);
2145 if (!p)
2b44f1ba 2146 goto out_resource;
c373b0a4
BF		 2147 *p++ = cpu_to_be32(2);
2148 *p++ = cpu_to_be32(word0);
2149 *p++ = cpu_to_be32(word1);
7e705706 2150 } else {
ddd1ea56
BF		 2151 p = xdr_reserve_space(xdr, 16);
2152 if (!p)
2b44f1ba 2153 goto out_resource;
c373b0a4
BF		 2154 *p++ = cpu_to_be32(3);
2155 *p++ = cpu_to_be32(word0);
2156 *p++ = cpu_to_be32(word1);
2157 *p++ = cpu_to_be32(word2);
7e705706 2158 }
1da177e4
LT		 2159 }
2160 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2161 p = xdr_reserve_space(xdr, 4);
2162 if (!p)
1da177e4 2163 goto out_resource;
3d2544b1 2164 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2165 if (dummy == NF4BAD) {
2166 status = nfserr_serverfault;
2167 goto out;
2168 }
c373b0a4 2169 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2170 }
2171 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2172 p = xdr_reserve_space(xdr, 4);
2173 if (!p)
1da177e4 2174 goto out_resource;
49640001 2175 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2176 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2177 else
c373b0a4
BF		 2178 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2179 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2180 }
2181 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2182 p = xdr_reserve_space(xdr, 8);
2183 if (!p)
1da177e4 2184 goto out_resource;
d05d5744 2185 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2186 }
2187 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2188 p = xdr_reserve_space(xdr, 8);
2189 if (!p)
1da177e4 2190 goto out_resource;
b64c7f3b 2191 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2192 }
2193 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2194 p = xdr_reserve_space(xdr, 4);
2195 if (!p)
1da177e4 2196 goto out_resource;
c373b0a4 2197 *p++ = cpu_to_be32(1);
1da177e4
LT		 2198 }
2199 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2200 p = xdr_reserve_space(xdr, 4);
2201 if (!p)
1da177e4 2202 goto out_resource;
c373b0a4 2203 *p++ = cpu_to_be32(1);
1da177e4
LT		 2204 }
2205 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2206 p = xdr_reserve_space(xdr, 4);
2207 if (!p)
1da177e4 2208 goto out_resource;
c373b0a4 2209 *p++ = cpu_to_be32(0);
1da177e4
LT		 2210 }
2211 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2212 p = xdr_reserve_space(xdr, 16);
2213 if (!p)
1da177e4 2214 goto out_resource;
42ca0993 2215 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2216 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2217 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2218 } else switch(fsid_source(fhp)) {
2219 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2220 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2221 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2222 break;
2223 case FSIDSOURCE_DEV:
c373b0a4
BF		 2224 *p++ = cpu_to_be32(0);
2225 *p++ = cpu_to_be32(MAJOR(stat.dev));
2226 *p++ = cpu_to_be32(0);
2227 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2228 break;
2229 case FSIDSOURCE_UUID:
94eb3689
KM		 2230 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2231 EX_UUID_LEN);
af6a4e28 2232 break;
1da177e4
LT		 2233 }
2234 }
2235 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2236 p = xdr_reserve_space(xdr, 4);
2237 if (!p)
1da177e4 2238 goto out_resource;
c373b0a4 2239 *p++ = cpu_to_be32(0);
1da177e4
LT		 2240 }
2241 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2242 p = xdr_reserve_space(xdr, 4);
2243 if (!p)
1da177e4 2244 goto out_resource;
c373b0a4 2245 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2246 }
2247 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2248 p = xdr_reserve_space(xdr, 4);
2249 if (!p)
1da177e4 2250 goto out_resource;
c373b0a4 2251 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2252 }
2253 if (bmval0 & FATTR4_WORD0_ACL) {
2254 struct nfs4_ace *ace;
1da177e4
LT		 2255
2256 if (acl == NULL) {
ddd1ea56
BF		 2257 p = xdr_reserve_space(xdr, 4);
2258 if (!p)
1da177e4
LT		 2259 goto out_resource;
2260
c373b0a4 2261 *p++ = cpu_to_be32(0);
1da177e4
LT		 2262 goto out_acl;
2263 }
ddd1ea56
BF		 2264 p = xdr_reserve_space(xdr, 4);
2265 if (!p)
1da177e4 2266 goto out_resource;
c373b0a4 2267 *p++ = cpu_to_be32(acl->naces);
1da177e4 2268
28e05dd8 2269 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2270 p = xdr_reserve_space(xdr, 4*3);
2271 if (!p)
1da177e4 2272 goto out_resource;
c373b0a4
BF		 2273 *p++ = cpu_to_be32(ace->type);
2274 *p++ = cpu_to_be32(ace->flag);
2275 *p++ = cpu_to_be32(ace->access_mask &
2276 NFS4_ACE_MASK_ALL);
ddd1ea56 2277 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2278 if (status)
2279 goto out;
2280 }
2281 }
2282out_acl:
2283 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2284 p = xdr_reserve_space(xdr, 4);
2285 if (!p)
1da177e4 2286 goto out_resource;
c373b0a4 2287 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2288 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2289 }
2290 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2291 p = xdr_reserve_space(xdr, 4);
2292 if (!p)
1da177e4 2293 goto out_resource;
c373b0a4 2294 *p++ = cpu_to_be32(1);
1da177e4
LT		 2295 }
2296 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2297 p = xdr_reserve_space(xdr, 4);
2298 if (!p)
1da177e4 2299 goto out_resource;
c373b0a4 2300 *p++ = cpu_to_be32(0);
1da177e4
LT		 2301 }
2302 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2303 p = xdr_reserve_space(xdr, 4);
2304 if (!p)
1da177e4 2305 goto out_resource;
c373b0a4 2306 *p++ = cpu_to_be32(1);
1da177e4
LT		 2307 }
2308 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2309 p = xdr_reserve_space(xdr, 4);
2310 if (!p)
1da177e4 2311 goto out_resource;
c373b0a4 2312 *p++ = cpu_to_be32(1);
1da177e4
LT		 2313 }
2314 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2315 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2316 if (!p)
1da177e4 2317 goto out_resource;
0c0c267b
BF		 2318 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2319 fhp->fh_handle.fh_size);
1da177e4
LT		 2320 }
2321 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2322 p = xdr_reserve_space(xdr, 8);
2323 if (!p)
1da177e4 2324 goto out_resource;
b64c7f3b 2325 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2326 }
2327 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2328 p = xdr_reserve_space(xdr, 8);
2329 if (!p)
1da177e4 2330 goto out_resource;
b64c7f3b 2331 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2332 }
2333 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2334 p = xdr_reserve_space(xdr, 8);
2335 if (!p)
1da177e4 2336 goto out_resource;
b64c7f3b 2337 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2338 }
2339 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2340 p = xdr_reserve_space(xdr, 8);
2341 if (!p)
1da177e4 2342 goto out_resource;
b64c7f3b 2343 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2344 }
81c3f413 2345 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2346 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2347 if (status)
2348 goto out;
2349 }
1da177e4 2350 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2351 p = xdr_reserve_space(xdr, 4);
2352 if (!p)
1da177e4 2353 goto out_resource;
c373b0a4 2354 *p++ = cpu_to_be32(1);
1da177e4
LT		 2355 }
2356 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2357 p = xdr_reserve_space(xdr, 8);
2358 if (!p)
1da177e4 2359 goto out_resource;
b64c7f3b 2360 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2361 }
2362 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2363 p = xdr_reserve_space(xdr, 4);
2364 if (!p)
1da177e4 2365 goto out_resource;
c373b0a4 2366 *p++ = cpu_to_be32(255);
1da177e4
LT		 2367 }
2368 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2369 p = xdr_reserve_space(xdr, 4);
2370 if (!p)
1da177e4 2371 goto out_resource;
c373b0a4 2372 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2373 }
2374 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2375 p = xdr_reserve_space(xdr, 8);
2376 if (!p)
1da177e4 2377 goto out_resource;
b64c7f3b 2378 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2379 }
2380 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2381 p = xdr_reserve_space(xdr, 8);
2382 if (!p)
1da177e4 2383 goto out_resource;
b64c7f3b 2384 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2385 }
2386 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2387 p = xdr_reserve_space(xdr, 4);
2388 if (!p)
1da177e4 2389 goto out_resource;
c373b0a4 2390 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2391 }
2392 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2393 p = xdr_reserve_space(xdr, 4);
2394 if (!p)
1da177e4 2395 goto out_resource;
c373b0a4 2396 *p++ = cpu_to_be32(1);
1da177e4
LT		 2397 }
2398 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2399 p = xdr_reserve_space(xdr, 4);
2400 if (!p)
1da177e4 2401 goto out_resource;
c373b0a4 2402 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2403 }
2404 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2405 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2406 if (status)
2407 goto out;
2408 }
2409 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2410 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2411 if (status)
2412 goto out;
2413 }
2414 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2415 p = xdr_reserve_space(xdr, 8);
2416 if (!p)
1da177e4 2417 goto out_resource;
c373b0a4
BF		 2418 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2419 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2420 }
2421 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2422 p = xdr_reserve_space(xdr, 8);
2423 if (!p)
1da177e4
LT		 2424 goto out_resource;
2425 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2426 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2427 }
2428 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2429 p = xdr_reserve_space(xdr, 8);
2430 if (!p)
1da177e4
LT		 2431 goto out_resource;
2432 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2433 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2434 }
2435 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2436 p = xdr_reserve_space(xdr, 8);
2437 if (!p)
1da177e4
LT		 2438 goto out_resource;
2439 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2440 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2441 }
2442 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2443 p = xdr_reserve_space(xdr, 8);
2444 if (!p)
1da177e4
LT		 2445 goto out_resource;
2446 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2447 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2448 }
2449 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2450 p = xdr_reserve_space(xdr, 12);
2451 if (!p)
1da177e4 2452 goto out_resource;
b64c7f3b 2453 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2454 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2455 }
2456 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2457 p = xdr_reserve_space(xdr, 12);
2458 if (!p)
1da177e4 2459 goto out_resource;
c373b0a4
BF		 2460 *p++ = cpu_to_be32(0);
2461 *p++ = cpu_to_be32(1);
2462 *p++ = cpu_to_be32(0);
1da177e4
LT		 2463 }
2464 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2465 p = xdr_reserve_space(xdr, 12);
2466 if (!p)
1da177e4 2467 goto out_resource;
b64c7f3b 2468 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2469 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2470 }
2471 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2472 p = xdr_reserve_space(xdr, 12);
2473 if (!p)
1da177e4 2474 goto out_resource;
b64c7f3b 2475 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2476 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2477 }
2478 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2479 p = xdr_reserve_space(xdr, 8);
2480 if (!p)
1da177e4 2481 goto out_resource;
406a7ea9
FF		 2482 /*
2483 * Get parent's attributes if not ignoring crossmount
2484 * and this is the root of a cross-mounted filesystem.
2485 */
2486 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2487 dentry == exp->ex_path.mnt->mnt_root)
2488 get_parent_attributes(exp, &stat);
b64c7f3b 2489 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2490 }
18032ca0 2491 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2492 status = nfsd4_encode_security_label(xdr, rqstp, context,
2493 contextlen);
18032ca0
DQ		 2494 if (status)
2495 goto out;
2496 }
8c18f205 2497 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2498 p = xdr_reserve_space(xdr, 16);
2499 if (!p)
de3997a7 2500 goto out_resource;
c373b0a4
BF		 2501 *p++ = cpu_to_be32(3);
2502 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2503 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2504 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2505 }
7e705706 2506
082d4bd7
BF		 2507 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2508 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2509 status = nfs_ok;
2510
2511out:
ba4e55bb 2512#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2513 if (context)
2514 security_release_secctx(context, contextlen);
ba4e55bb 2515#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2516 kfree(acl);
18df11d0 2517 if (tempfh) {
d50e6136 2518 fh_put(tempfh);
18df11d0
YZ		 2519 kfree(tempfh);
2520 }
1fcea5b2
BF		 2521 if (status)
2522 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2523 return status;
2524out_nfserr:
b8dd7b9a 2525 status = nfserrno(err);
1da177e4
LT		 2526 goto out;
2527out_resource:
1da177e4
LT		 2528 status = nfserr_resource;
2529 goto out;
1da177e4
LT		 2530}
2531
2825a7f9
BF		 2532static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2533 struct xdr_buf *buf, __be32 *p, int bytes)
2534{
2535 xdr->scratch.iov_len = 0;
2536 memset(buf, 0, sizeof(struct xdr_buf));
2537 buf->head[0].iov_base = p;
2538 buf->head[0].iov_len = 0;
2539 buf->len = 0;
2540 xdr->buf = buf;
2541 xdr->iov = buf->head;
2542 xdr->p = p;
2543 xdr->end = (void *)p + bytes;
2544 buf->buflen = bytes;
2545}
2546
d5184658
BF		 2547__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2548 struct svc_fh *fhp, struct svc_export *exp,
2549 struct dentry *dentry, u32 *bmval,
2550 struct svc_rqst *rqstp, int ignore_crossmnt)
2551{
2825a7f9 2552 struct xdr_buf dummy;
d5184658
BF		 2553 struct xdr_stream xdr;
2554 __be32 ret;
2555
2825a7f9 2556 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2557 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2558 ignore_crossmnt);
2559 *p = xdr.p;
2560 return ret;
2561}
2562
c0ce6ec8
BF		 2563static inline int attributes_need_mount(u32 *bmval)
2564{
2565 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2566 return 1;
2567 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2568 return 1;
2569 return 0;
2570}
2571
b37ad28b 2572static __be32
561f0ed4
BF		 2573nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2574 const char *name, int namlen)
1da177e4
LT		 2575{
2576 struct svc_export *exp = cd->rd_fhp->fh_export;
2577 struct dentry *dentry;
b37ad28b 2578 __be32 nfserr;
406a7ea9 2579 int ignore_crossmnt = 0;
1da177e4
LT		 2580
2581 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2582 if (IS_ERR(dentry))
2583 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2584 if (!dentry->d_inode) {
2585 /*
2586 * nfsd_buffered_readdir drops the i_mutex between
2587 * readdir and calling this callback, leaving a window
2588 * where this directory entry could have gone away.
2589 */
2590 dput(dentry);
2591 return nfserr_noent;
2592 }
1da177e4
LT		 2593
2594 exp_get(exp);
406a7ea9
FF		 2595 /*
2596 * In the case of a mountpoint, the client may be asking for
2597 * attributes that are only properties of the underlying filesystem
2598 * as opposed to the cross-mounted file system. In such a case,
2599 * we will not follow the cross mount and will fill the attribtutes
2600 * directly from the mountpoint dentry.
2601 */
3227fa41 2602 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2603 int err;
2604
3227fa41
BF		 2605 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2606 && !attributes_need_mount(cd->rd_bmval)) {
2607 ignore_crossmnt = 1;
2608 goto out_encode;
2609 }
dcb488a3
AA		 2610 /*
2611 * Why the heck aren't we just using nfsd_lookup??
2612 * Different "."/".." handling? Something else?
2613 * At least, add a comment here to explain....
2614 */
021d3a72
BF		 2615 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2616 if (err) {
2617 nfserr = nfserrno(err);
1da177e4
LT		 2618 goto out_put;
2619 }
dcb488a3
AA		 2620 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2621 if (nfserr)
2622 goto out_put;
1da177e4
LT		 2623
2624 }
3227fa41 2625out_encode:
561f0ed4 2626 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2627 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2628out_put:
2629 dput(dentry);
2630 exp_put(exp);
2631 return nfserr;
2632}
2633
2ebbc012 2634static __be32 *
561f0ed4 2635nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2636{
561f0ed4
BF		 2637 __be32 *p;
2638
2639 p = xdr_reserve_space(xdr, 6);
2640 if (!p)
1da177e4
LT		 2641 return NULL;
2642 *p++ = htonl(2);
2643 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2644 *p++ = htonl(0); /* bmval1 */
2645
87915c64 2646 *p++ = htonl(4); /* attribute length */
1da177e4 2647 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2648 return p;
2649}
2650
2651static int
a0ad13ef
N		 2652nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2653 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2654{
a0ad13ef 2655 struct readdir_cd *ccd = ccdv;
1da177e4 2656 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2657 struct xdr_stream *xdr = cd->xdr;
2658 int start_offset = xdr->buf->len;
2659 int cookie_offset;
2660 int entry_bytes;
b37ad28b 2661 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2662 __be64 wire_offset;
2663 __be32 *p;
1da177e4
LT		 2664
2665 /* In nfsv4, "." and ".." never make it onto the wire.. */
2666 if (name && isdotent(name, namlen)) {
2667 cd->common.err = nfs_ok;
2668 return 0;
2669 }
2670
561f0ed4
BF		 2671 if (cd->cookie_offset) {
2672 wire_offset = cpu_to_be64(offset);
2673 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2674 &wire_offset, 8);
2675 }
1da177e4 2676
561f0ed4
BF		 2677 p = xdr_reserve_space(xdr, 4);
2678 if (!p)
1da177e4 2679 goto fail;
1da177e4 2680 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2681 cookie_offset = xdr->buf->len;
2682 p = xdr_reserve_space(xdr, 3*4 + namlen);
2683 if (!p)
2684 goto fail;
1da177e4
LT		 2685 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2686 p = xdr_encode_array(p, name, namlen); /* name length & name */
2687
561f0ed4 2688 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2689 switch (nfserr) {
2690 case nfs_ok:
1da177e4
LT		 2691 break;
2692 case nfserr_resource:
2693 nfserr = nfserr_toosmall;
2694 goto fail;
b2c0cea6 2695 case nfserr_noent:
f41c5ad2 2696 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2697 goto skip_entry;
1da177e4
LT		 2698 default:
2699 /*
2700 * If the client requested the RDATTR_ERROR attribute,
2701 * we stuff the error code into this attribute
2702 * and continue. If this attribute was not requested,
2703 * then in accordance with the spec, we fail the
2704 * entire READDIR operation(!)
2705 */
2706 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2707 goto fail;
561f0ed4 2708 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2709 if (p == NULL) {
2710 nfserr = nfserr_toosmall;
1da177e4 2711 goto fail;
34081efc 2712 }
1da177e4 2713 }
561f0ed4
BF		 2714 nfserr = nfserr_toosmall;
2715 entry_bytes = xdr->buf->len - start_offset;
2716 if (entry_bytes > cd->rd_maxcount)
2717 goto fail;
2718 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2719 if (!cd->rd_dircount)
2720 goto fail;
2721 cd->rd_dircount--;
561f0ed4 2722 cd->cookie_offset = cookie_offset;
b2c0cea6 2723skip_entry:
1da177e4
LT		 2724 cd->common.err = nfs_ok;
2725 return 0;
2726fail:
561f0ed4 2727 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2728 cd->common.err = nfserr;
2729 return -EINVAL;
2730}
2731
d0a381dd
BF		 2732static __be32
2733nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2734{
bc749ca4 2735 __be32 *p;
e2f282b9 2736
d0a381dd
BF		 2737 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2738 if (!p)
2739 return nfserr_resource;
c373b0a4 2740 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2741 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2742 sizeof(stateid_opaque_t));
d0a381dd 2743 return 0;
e2f282b9
BH		 2744}
2745
695e12f8 2746static __be32
b37ad28b 2747nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2748{
d0a381dd 2749 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2750 __be32 *p;
1da177e4
LT		 2751
2752 if (!nfserr) {
d0a381dd
BF		 2753 p = xdr_reserve_space(xdr, 8);
2754 if (!p)
2755 return nfserr_resource;
c373b0a4
BF		 2756 *p++ = cpu_to_be32(access->ac_supported);
2757 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2758 }
695e12f8 2759 return nfserr;
1da177e4
LT		 2760}
2761
1d1bc8f2
BF		 2762static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2763{
d0a381dd 2764 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2765 __be32 *p;
2766
2767 if (!nfserr) {
d0a381dd
BF		 2768 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2769 if (!p)
2770 return nfserr_resource;
0c0c267b
BF		 2771 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2772 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2773 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2774 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2775 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2776 }
2777 return nfserr;
2778}
2779
695e12f8 2780static __be32
b37ad28b 2781nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2782{
d0a381dd
BF		 2783 struct xdr_stream *xdr = &resp->xdr;
2784
e2f282b9 2785 if (!nfserr)
d0a381dd 2786 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2787
695e12f8 2788 return nfserr;
1da177e4
LT		 2789}
2790
2791
695e12f8 2792static __be32
b37ad28b 2793nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2794{
d0a381dd 2795 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2796 __be32 *p;
1da177e4
LT		 2797
2798 if (!nfserr) {
d0a381dd
BF		 2799 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2800 if (!p)
2801 return nfserr_resource;
0c0c267b
BF		 2802 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2803 NFS4_VERIFIER_SIZE);
1da177e4 2804 }
695e12f8 2805 return nfserr;
1da177e4
LT		 2806}
2807
695e12f8 2808static __be32
b37ad28b 2809nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2810{
d0a381dd 2811 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2812 __be32 *p;
1da177e4
LT		 2813
2814 if (!nfserr) {
d0a381dd
BF		 2815 p = xdr_reserve_space(xdr, 32);
2816 if (!p)
2817 return nfserr_resource;
d05d5744 2818 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2819 *p++ = cpu_to_be32(2);
2820 *p++ = cpu_to_be32(create->cr_bmval[0]);
2821 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2822 }
695e12f8 2823 return nfserr;
1da177e4
LT		 2824}
2825
b37ad28b
AV		 2826static __be32
2827nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2828{
2829 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2830 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2831
2832 if (nfserr)
2833 return nfserr;
2834
d5184658
BF		 2835 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2836 getattr->ga_bmval,
406a7ea9 2837 resp->rqstp, 0);
1da177e4
LT		 2838 return nfserr;
2839}
2840
695e12f8
BH		 2841static __be32
2842nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2843{
d0a381dd 2844 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2845 struct svc_fh *fhp = *fhpp;
1da177e4 2846 unsigned int len;
bc749ca4 2847 __be32 *p;
1da177e4
LT		 2848
2849 if (!nfserr) {
2850 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2851 p = xdr_reserve_space(xdr, len + 4);
2852 if (!p)
2853 return nfserr_resource;
0c0c267b 2854 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2855 }
695e12f8 2856 return nfserr;
1da177e4
LT		 2857}
2858
2859/*
2860* Including all fields other than the name, a LOCK4denied structure requires
2861* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2862*/
d0a381dd
BF		 2863static __be32
2864nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2865{
7c13f344 2866 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2867 __be32 *p;
1da177e4 2868
8c7424cf 2869again:
d0a381dd 2870 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2871 if (!p) {
2872 /*
2873 * Don't fail to return the result just because we can't
2874 * return the conflicting open:
2875 */
2876 if (conf->len) {
2877 conf->len = 0;
2878 conf->data = NULL;
2879 goto again;
2880 }
d0a381dd 2881 return nfserr_resource;
8c7424cf 2882 }
b64c7f3b
BF		 2883 p = xdr_encode_hyper(p, ld->ld_start);
2884 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2885 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2886 if (conf->len) {
0c0c267b
BF		 2887 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2888 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2889 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2890 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2891 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2892 }
d0a381dd 2893 return nfserr_denied;
1da177e4
LT		 2894}
2895
695e12f8 2896static __be32
b37ad28b 2897nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2898{
d0a381dd
BF		 2899 struct xdr_stream *xdr = &resp->xdr;
2900
e2f282b9 2901 if (!nfserr)
d0a381dd 2902 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2903 else if (nfserr == nfserr_denied)
d0a381dd 2904 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2905 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2906 return nfserr;
1da177e4
LT		 2907}
2908
695e12f8 2909static __be32
b37ad28b 2910nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2911{
d0a381dd
BF		 2912 struct xdr_stream *xdr = &resp->xdr;
2913
1da177e4 2914 if (nfserr == nfserr_denied)
d0a381dd 2915 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2916 return nfserr;
1da177e4
LT		 2917}
2918
695e12f8 2919static __be32
b37ad28b 2920nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2921{
d0a381dd
BF		 2922 struct xdr_stream *xdr = &resp->xdr;
2923
e2f282b9 2924 if (!nfserr)
d0a381dd 2925 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2926
695e12f8 2927 return nfserr;
1da177e4
LT		 2928}
2929
2930
695e12f8 2931static __be32
b37ad28b 2932nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2933{
d0a381dd 2934 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2935 __be32 *p;
1da177e4
LT		 2936
2937 if (!nfserr) {
d0a381dd
BF		 2938 p = xdr_reserve_space(xdr, 20);
2939 if (!p)
2940 return nfserr_resource;
d05d5744 2941 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2942 }
695e12f8 2943 return nfserr;
1da177e4
LT		 2944}
2945
2946
695e12f8 2947static __be32
b37ad28b 2948nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2949{
d0a381dd 2950 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2951 __be32 *p;
1da177e4
LT		 2952
2953 if (nfserr)
2954 goto out;
2955
d0a381dd
BF		 2956 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2957 if (nfserr)
2958 goto out;
2959 p = xdr_reserve_space(xdr, 40);
2960 if (!p)
2961 return nfserr_resource;
d05d5744 2962 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2963 *p++ = cpu_to_be32(open->op_rflags);
2964 *p++ = cpu_to_be32(2);
2965 *p++ = cpu_to_be32(open->op_bmval[0]);
2966 *p++ = cpu_to_be32(open->op_bmval[1]);
2967 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2968
2969 switch (open->op_delegate_type) {
2970 case NFS4_OPEN_DELEGATE_NONE:
2971 break;
2972 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2973 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2974 if (nfserr)
2975 return nfserr;
2976 p = xdr_reserve_space(xdr, 20);
2977 if (!p)
2978 return nfserr_resource;
c373b0a4 2979 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2980
2981 /*
2982 * TODO: ACE's in delegations
2983 */
c373b0a4
BF		 2984 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2985 *p++ = cpu_to_be32(0);
2986 *p++ = cpu_to_be32(0);
2987 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2988 break;
2989 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2990 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2991 if (nfserr)
2992 return nfserr;
2993 p = xdr_reserve_space(xdr, 32);
2994 if (!p)
2995 return nfserr_resource;
c373b0a4 2996 *p++ = cpu_to_be32(0);
1da177e4
LT		 2997
2998 /*
2999 * TODO: space_limit's in delegations
3000 */
c373b0a4
BF		 3001 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3002 *p++ = cpu_to_be32(~(u32)0);
3003 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3004
3005 /*
3006 * TODO: ACE's in delegations
3007 */
c373b0a4
BF		 3008 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3009 *p++ = cpu_to_be32(0);
3010 *p++ = cpu_to_be32(0);
3011 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3012 break;
d24433cd
BH		 3013 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3014 switch (open->op_why_no_deleg) {
3015 case WND4_CONTENTION:
3016 case WND4_RESOURCE:
d0a381dd
BF		 3017 p = xdr_reserve_space(xdr, 8);
3018 if (!p)
3019 return nfserr_resource;
c373b0a4
BF		 3020 *p++ = cpu_to_be32(open->op_why_no_deleg);
3021 /* deleg signaling not supported yet: */
3022 *p++ = cpu_to_be32(0);
d24433cd
BH		 3023 break;
3024 default:
d0a381dd
BF		 3025 p = xdr_reserve_space(xdr, 4);
3026 if (!p)
3027 return nfserr_resource;
c373b0a4 3028 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3029 }
d24433cd 3030 break;
1da177e4
LT		 3031 default:
3032 BUG();
3033 }
3034 /* XXX save filehandle here */
3035out:
695e12f8 3036 return nfserr;
1da177e4
LT		 3037}
3038
695e12f8 3039static __be32
b37ad28b 3040nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3041{
d0a381dd
BF		 3042 struct xdr_stream *xdr = &resp->xdr;
3043
e2f282b9 3044 if (!nfserr)
d0a381dd 3045 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3046
695e12f8 3047 return nfserr;
1da177e4
LT		 3048}
3049
695e12f8 3050static __be32
b37ad28b 3051nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3052{
d0a381dd
BF		 3053 struct xdr_stream *xdr = &resp->xdr;
3054
e2f282b9 3055 if (!nfserr)
d0a381dd 3056 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3057
695e12f8 3058 return nfserr;
1da177e4
LT		 3059}
3060
dc97618d
BF		 3061static __be32 nfsd4_encode_splice_read(
3062 struct nfsd4_compoundres *resp,
3063 struct nfsd4_read *read,
3064 struct file *file, unsigned long maxcount)
1da177e4 3065{
ddd1ea56 3066 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3067 struct xdr_buf *buf = xdr->buf;
dc97618d 3068 u32 eof;
30596768 3069 int space_left;
dc97618d 3070 __be32 nfserr;
fec25fa4 3071 __be32 *p = xdr->p - 2;
1da177e4 3072
dc97618d
BF		 3073 /*
3074 * Don't inline pages unless we know there's room for eof,
3075 * count, and possible padding:
3076 */
3077 if (xdr->end - xdr->p < 3)
d0a381dd 3078 return nfserr_resource;
dc97618d
BF		 3079
3080 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3081 read->rd_offset, &maxcount);
3082 if (nfserr) {
3083 /*
3084 * nfsd_splice_actor may have already messed with the
3085 * page length; reset it so as not to confuse
3086 * xdr_truncate_encode:
3087 */
34a78b48 3088 buf->page_len = 0;
dc97618d 3089 return nfserr;
b0e35fda 3090 }
1da177e4 3091
dc97618d
BF		 3092 eof = (read->rd_offset + maxcount >=
3093 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3094
fec25fa4
BF		 3095 *(p++) = htonl(eof);
3096 *(p++) = htonl(maxcount);
dc97618d 3097
34a78b48
BF		 3098 buf->page_len = maxcount;
3099 buf->len += maxcount;
dc97618d 3100 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3101
3102 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3103 buf->tail[0].iov_base = xdr->p;
3104 buf->tail[0].iov_len = 0;
fec25fa4 3105 xdr->iov = buf->tail;
dc97618d 3106 if (maxcount&3) {
fec25fa4
BF		 3107 int pad = 4 - (maxcount&3);
3108
3109 *(xdr->p++) = 0;
3110
34a78b48 3111 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3112 buf->tail[0].iov_len = pad;
3113 buf->len += pad;
b0e35fda 3114 }
2825a7f9 3115
dc97618d 3116 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3117 buf->buflen - buf->len);
3118 buf->buflen = buf->len + space_left;
dc97618d
BF		 3119 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3120
3121 return 0;
3122}
3123
3124static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3125 struct nfsd4_read *read,
3126 struct file *file, unsigned long maxcount)
3127{
3128 struct xdr_stream *xdr = &resp->xdr;
3129 u32 eof;
3130 int v;
dc97618d 3131 int starting_len = xdr->buf->len - 8;
dc97618d 3132 long len;
b0420980 3133 int thislen;
dc97618d
BF		 3134 __be32 nfserr;
3135 __be32 tmp;
3136 __be32 *p;
b0420980
BF		 3137 u32 zzz = 0;
3138 int pad;
1da177e4
LT		 3139
3140 len = maxcount;
3141 v = 0;
6ff9897d 3142
3c7aa15d 3143 thislen = min(len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3144 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3145 WARN_ON_ONCE(!p);
3146 resp->rqstp->rq_vec[v].iov_base = p;
3147 resp->rqstp->rq_vec[v].iov_len = thislen;
3148 v++;
3149 len -= thislen;
3150
3151 while (len) {
6ff9897d 3152 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3153 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3154 WARN_ON_ONCE(!p);
3155 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3156 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3157 v++;
6ff9897d 3158 len -= thislen;
1da177e4
LT		 3159 }
3160 read->rd_vlen = v;
3161
dc97618d
BF		 3162 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3163 read->rd_vlen, &maxcount);
3164 if (nfserr)
1da177e4 3165 return nfserr;
b0420980 3166 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3167
44524359
N		 3168 eof = (read->rd_offset + maxcount >=
3169 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3170
dc97618d
BF		 3171 tmp = htonl(eof);
3172 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3173 tmp = htonl(maxcount);
3174 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3175
b0420980
BF		 3176 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3177 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3178 &zzz, pad);
1da177e4 3179 return 0;
dc97618d
BF		 3180
3181}
3182
3183static __be32
3184nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3185 struct nfsd4_read *read)
3186{
3187 unsigned long maxcount;
3188 struct xdr_stream *xdr = &resp->xdr;
3189 struct file *file = read->rd_filp;
3190 int starting_len = xdr->buf->len;
3191 struct raparms *ra;
3192 __be32 *p;
3193 __be32 err;
3194
3195 if (nfserr)
3196 return nfserr;
3197
3198 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3199 if (!p) {
3200 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3201 return nfserr_resource;
3202 }
b0420980
BF		 3203 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3204 WARN_ON_ONCE(1);
dc97618d
BF		 3205 return nfserr_resource;
3206 }
dc97618d
BF		 3207 xdr_commit_encode(xdr);
3208
3209 maxcount = svc_max_payload(resp->rqstp);
3c7aa15d
KM		 3210 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3211 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d
BF		 3212
3213 if (!read->rd_filp) {
3214 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3215 &file, &ra);
3216 if (err)
3217 goto err_truncate;
3218 }
3219
3220 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3221 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3222 else
3223 err = nfsd4_encode_readv(resp, read, file, maxcount);
3224
3225 if (!read->rd_filp)
3226 nfsd_put_tmp_read_open(file, ra);
3227
3228err_truncate:
3229 if (err)
3230 xdr_truncate_encode(xdr, starting_len);
3231 return err;
1da177e4
LT		 3232}
3233
b37ad28b
AV		 3234static __be32
3235nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3236{
3237 int maxcount;
476a7b1f
BF		 3238 __be32 wire_count;
3239 int zero = 0;
ddd1ea56 3240 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3241 int length_offset = xdr->buf->len;
bc749ca4 3242 __be32 *p;
1da177e4
LT		 3243
3244 if (nfserr)
3245 return nfserr;
2825a7f9
BF		 3246
3247 p = xdr_reserve_space(xdr, 4);
3248 if (!p)
3249 return nfserr_resource;
1da177e4 3250 maxcount = PAGE_SIZE;
d0a381dd 3251
476a7b1f
BF		 3252 p = xdr_reserve_space(xdr, maxcount);
3253 if (!p)
4e21ac4b 3254 return nfserr_resource;
1da177e4
LT		 3255 /*
3256 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3257 * if they would overflow the buffer. Is this kosher in NFSv4? If
3258 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3259 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3260 */
476a7b1f
BF		 3261 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3262 (char *)p, &maxcount);
1da177e4 3263 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3264 nfserr = nfserr_inval;
3265 if (nfserr) {
1fcea5b2 3266 xdr_truncate_encode(xdr, length_offset);
1da177e4 3267 return nfserr;
d3f627c8 3268 }
1da177e4 3269
476a7b1f
BF		 3270 wire_count = htonl(maxcount);
3271 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3272 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3273 if (maxcount & 3)
3274 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3275 &zero, 4 - (maxcount&3));
1da177e4
LT		 3276 return 0;
3277}
3278
b37ad28b
AV		 3279static __be32
3280nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3281{
3282 int maxcount;
561f0ed4 3283 int bytes_left;
1da177e4 3284 loff_t offset;
561f0ed4 3285 __be64 wire_offset;
ddd1ea56 3286 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3287 int starting_len = xdr->buf->len;
bc749ca4 3288 __be32 *p;
1da177e4
LT		 3289
3290 if (nfserr)
3291 return nfserr;
1da177e4 3292
d0a381dd
BF		 3293 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3294 if (!p)
3295 return nfserr_resource;
1da177e4
LT		 3296
3297 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3298 *p++ = cpu_to_be32(0);
3299 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3300 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3301 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3302
3303 /*
561f0ed4
BF		 3304 * Number of bytes left for directory entries allowing for the
3305 * final 8 bytes of the readdir and a following failed op:
3306 */
3307 bytes_left = xdr->buf->buflen - xdr->buf->len
3308 - COMPOUND_ERR_SLACK_SPACE - 8;
3309 if (bytes_left < 0) {
3310 nfserr = nfserr_resource;
3311 goto err_no_verf;
3312 }
3313 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3314 /*
3315 * Note the rfc defines rd_maxcount as the size of the
3316 * READDIR4resok structure, which includes the verifier above
3317 * and the 8 bytes encoded at the end of this function:
1da177e4 3318 */
561f0ed4
BF		 3319 if (maxcount < 16) {
3320 nfserr = nfserr_toosmall;
1da177e4
LT		 3321 goto err_no_verf;
3322 }
561f0ed4 3323 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3324
561f0ed4
BF		 3325 readdir->xdr = xdr;
3326 readdir->rd_maxcount = maxcount;
1da177e4 3327 readdir->common.err = 0;
561f0ed4 3328 readdir->cookie_offset = 0;
1da177e4
LT		 3329
3330 offset = readdir->rd_cookie;
3331 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3332 &offset,
3333 &readdir->common, nfsd4_encode_dirent);
3334 if (nfserr == nfs_ok &&
3335 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3336 xdr->buf->len == starting_len + 8) {
3337 /* nothing encoded; which limit did we hit?: */
3338 if (maxcount - 16 < bytes_left)
3339 /* It was the fault of rd_maxcount: */
3340 nfserr = nfserr_toosmall;
3341 else
3342 /* We ran out of buffer space: */
3343 nfserr = nfserr_resource;
3344 }
1da177e4
LT		 3345 if (nfserr)
3346 goto err_no_verf;
3347
561f0ed4
BF		 3348 if (readdir->cookie_offset) {
3349 wire_offset = cpu_to_be64(offset);
3350 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3351 &wire_offset, 8);
3352 }
1da177e4 3353
561f0ed4
BF		 3354 p = xdr_reserve_space(xdr, 8);
3355 if (!p) {
3356 WARN_ON_ONCE(1);
3357 goto err_no_verf;
3358 }
1da177e4
LT		 3359 *p++ = 0; /* no more entries */
3360 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3361
3362 return 0;
3363err_no_verf:
1fcea5b2 3364 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3365 return nfserr;
3366}
3367
695e12f8 3368static __be32
b37ad28b 3369nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3370{
d0a381dd 3371 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3372 __be32 *p;
1da177e4
LT		 3373
3374 if (!nfserr) {
d0a381dd
BF		 3375 p = xdr_reserve_space(xdr, 20);
3376 if (!p)
3377 return nfserr_resource;
d05d5744 3378 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3379 }
695e12f8 3380 return nfserr;
1da177e4
LT		 3381}
3382
695e12f8 3383static __be32
b37ad28b 3384nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3385{
d0a381dd 3386 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3387 __be32 *p;
1da177e4
LT		 3388
3389 if (!nfserr) {
d0a381dd
BF		 3390 p = xdr_reserve_space(xdr, 40);
3391 if (!p)
3392 return nfserr_resource;
d05d5744
BF		 3393 p = encode_cinfo(p, &rename->rn_sinfo);
3394 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3395 }
695e12f8 3396 return nfserr;
1da177e4
LT		 3397}
3398
695e12f8 3399static __be32
d0a381dd 3400nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3401 __be32 nfserr, struct svc_export *exp)
dcb488a3 3402{
676e4ebd 3403 u32 i, nflavs, supported;
4796f457
BF		 3404 struct exp_flavor_info *flavs;
3405 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3406 __be32 *p, *flavorsp;
3407 static bool report = true;
dcb488a3
AA		 3408
3409 if (nfserr)
3410 goto out;
d0a381dd 3411 nfserr = nfserr_resource;
4796f457
BF		 3412 if (exp->ex_nflavors) {
3413 flavs = exp->ex_flavors;
3414 nflavs = exp->ex_nflavors;
3415 } else { /* Handling of some defaults in absence of real secinfo: */
3416 flavs = def_flavs;
3417 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3418 nflavs = 2;
3419 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3420 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3421 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3422 nflavs = 1;
3423 flavs[0].pseudoflavor
3424 = svcauth_gss_flavor(exp->ex_client);
3425 } else {
3426 nflavs = 1;
3427 flavs[0].pseudoflavor
3428 = exp->ex_client->flavour->flavour;
3429 }
3430 }
3431
676e4ebd 3432 supported = 0;
d0a381dd
BF		 3433 p = xdr_reserve_space(xdr, 4);
3434 if (!p)
3435 goto out;
676e4ebd 3436 flavorsp = p++; /* to be backfilled later */
676e4ebd 3437
4796f457 3438 for (i = 0; i < nflavs; i++) {
676e4ebd 3439 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3440 struct rpcsec_gss_info info;
dcb488a3 3441
676e4ebd
CL		 3442 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3443 supported++;
d0a381dd
BF		 3444 p = xdr_reserve_space(xdr, 4 + 4 +
3445 XDR_LEN(info.oid.len) + 4 + 4);
3446 if (!p)
3447 goto out;
c373b0a4 3448 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3449 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3450 *p++ = cpu_to_be32(info.qop);
3451 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3452 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3453 supported++;
d0a381dd
BF		 3454 p = xdr_reserve_space(xdr, 4);
3455 if (!p)
3456 goto out;
c373b0a4 3457 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3458 } else {
3459 if (report)
3460 pr_warn("NFS: SECINFO: security flavor %u "
3461 "is not supported\n", pf);
dcb488a3
AA		 3462 }
3463 }
a77c806f 3464
676e4ebd
CL		 3465 if (nflavs != supported)
3466 report = false;
3467 *flavorsp = htonl(supported);
d0a381dd 3468 nfserr = 0;
dcb488a3
AA		 3469out:
3470 if (exp)
3471 exp_put(exp);
695e12f8 3472 return nfserr;
dcb488a3
AA		 3473}
3474
22b6dee8
MJ		 3475static __be32
3476nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3477 struct nfsd4_secinfo *secinfo)
3478{
d0a381dd
BF		 3479 struct xdr_stream *xdr = &resp->xdr;
3480
3481 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3482}
3483
3484static __be32
3485nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3486 struct nfsd4_secinfo_no_name *secinfo)
3487{
d0a381dd
BF		 3488 struct xdr_stream *xdr = &resp->xdr;
3489
3490 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3491}
3492
1da177e4
LT		 3493/*
3494 * The SETATTR encode routine is special -- it always encodes a bitmap,
3495 * regardless of the error status.
3496 */
695e12f8 3497static __be32
b37ad28b 3498nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3499{
d0a381dd 3500 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3501 __be32 *p;
1da177e4 3502
d0a381dd
BF		 3503 p = xdr_reserve_space(xdr, 16);
3504 if (!p)
3505 return nfserr_resource;
1da177e4 3506 if (nfserr) {
c373b0a4
BF		 3507 *p++ = cpu_to_be32(3);
3508 *p++ = cpu_to_be32(0);
3509 *p++ = cpu_to_be32(0);
3510 *p++ = cpu_to_be32(0);
1da177e4
LT		 3511 }
3512 else {
c373b0a4
BF		 3513 *p++ = cpu_to_be32(3);
3514 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3515 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3516 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3517 }
695e12f8 3518 return nfserr;
1da177e4
LT		 3519}
3520
695e12f8 3521static __be32
b37ad28b 3522nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3523{
d0a381dd 3524 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3525 __be32 *p;
1da177e4
LT		 3526
3527 if (!nfserr) {
d0a381dd
BF		 3528 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3529 if (!p)
3530 return nfserr_resource;
0c0c267b
BF		 3531 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3532 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3533 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3534 }
3535 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3536 p = xdr_reserve_space(xdr, 8);
3537 if (!p)
3538 return nfserr_resource;
c373b0a4
BF		 3539 *p++ = cpu_to_be32(0);
3540 *p++ = cpu_to_be32(0);
1da177e4 3541 }
695e12f8 3542 return nfserr;
1da177e4
LT		 3543}
3544
695e12f8 3545static __be32
b37ad28b 3546nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3547{
d0a381dd 3548 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3549 __be32 *p;
1da177e4
LT		 3550
3551 if (!nfserr) {
d0a381dd
BF		 3552 p = xdr_reserve_space(xdr, 16);
3553 if (!p)
3554 return nfserr_resource;
c373b0a4
BF		 3555 *p++ = cpu_to_be32(write->wr_bytes_written);
3556 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3557 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3558 NFS4_VERIFIER_SIZE);
1da177e4 3559 }
695e12f8 3560 return nfserr;
1da177e4
LT		 3561}
3562
57266a6e
BF		 3563static const u32 nfs4_minimal_spo_must_enforce[2] = {
3564 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3565 1 << (OP_EXCHANGE_ID - 32) |
3566 1 << (OP_CREATE_SESSION - 32) |
3567 1 << (OP_DESTROY_SESSION - 32) |
3568 1 << (OP_DESTROY_CLIENTID - 32)
3569};
3570
2db134eb 3571static __be32
57b7b43b 3572nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3573 struct nfsd4_exchange_id *exid)
3574{
d0a381dd 3575 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3576 __be32 *p;
0733d213
AA		 3577 char *major_id;
3578 char *server_scope;
3579 int major_id_sz;
3580 int server_scope_sz;
3581 uint64_t minor_id = 0;
3582
3583 if (nfserr)
3584 return nfserr;
3585
3586 major_id = utsname()->nodename;
3587 major_id_sz = strlen(major_id);
3588 server_scope = utsname()->nodename;
3589 server_scope_sz = strlen(server_scope);
3590
d0a381dd 3591 p = xdr_reserve_space(xdr,
0733d213
AA		 3592 8 /* eir_clientid */ +
3593 4 /* eir_sequenceid */ +
3594 4 /* eir_flags */ +
a8bb84bc 3595 4 /* spr_how */);
d0a381dd
BF		 3596 if (!p)
3597 return nfserr_resource;
0733d213 3598
0c0c267b 3599 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3600 *p++ = cpu_to_be32(exid->seqid);
3601 *p++ = cpu_to_be32(exid->flags);
0733d213 3602
c373b0a4 3603 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3604
57266a6e
BF		 3605 switch (exid->spa_how) {
3606 case SP4_NONE:
3607 break;
3608 case SP4_MACH_CRED:
a8bb84bc 3609 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3610 p = xdr_reserve_space(xdr, 16);
3611 if (!p)
3612 return nfserr_resource;
a8bb84bc 3613
57266a6e 3614 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3615 *p++ = cpu_to_be32(2);
3616 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3617 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3618 /* empty spo_must_allow bitmap: */
c373b0a4 3619 *p++ = cpu_to_be32(0);
a8bb84bc 3620
57266a6e
BF		 3621 break;
3622 default:
3623 WARN_ON_ONCE(1);
3624 }
0733d213 3625
d0a381dd 3626 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3627 8 /* so_minor_id */ +
3628 4 /* so_major_id.len */ +
3629 (XDR_QUADLEN(major_id_sz) * 4) +
3630 4 /* eir_server_scope.len */ +
3631 (XDR_QUADLEN(server_scope_sz) * 4) +
3632 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3633 if (!p)
3634 return nfserr_resource;
a8bb84bc 3635
0733d213 3636 /* The server_owner struct */
b64c7f3b 3637 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3638 /* major id */
0c0c267b 3639 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3640
3641 /* Server scope */
0c0c267b 3642 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3643
3644 /* Implementation id */
c373b0a4 3645 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3646 return 0;
2db134eb
AA		 3647}
3648
3649static __be32
57b7b43b 3650nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3651 struct nfsd4_create_session *sess)
3652{
d0a381dd 3653 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3654 __be32 *p;
ec6b5d7b
AA		 3655
3656 if (nfserr)
3657 return nfserr;
3658
d0a381dd
BF		 3659 p = xdr_reserve_space(xdr, 24);
3660 if (!p)
3661 return nfserr_resource;
0c0c267b
BF		 3662 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3663 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3664 *p++ = cpu_to_be32(sess->seqid);
3665 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3666
d0a381dd
BF		 3667 p = xdr_reserve_space(xdr, 28);
3668 if (!p)
3669 return nfserr_resource;
c373b0a4
BF		 3670 *p++ = cpu_to_be32(0); /* headerpadsz */
3671 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3672 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3673 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3674 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3675 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3676 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3677
3678 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3679 p = xdr_reserve_space(xdr, 4);
3680 if (!p)
3681 return nfserr_resource;
c373b0a4 3682 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3683 }
3684
d0a381dd
BF		 3685 p = xdr_reserve_space(xdr, 28);
3686 if (!p)
3687 return nfserr_resource;
c373b0a4
BF		 3688 *p++ = cpu_to_be32(0); /* headerpadsz */
3689 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3690 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3691 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3692 *p++ = cpu_to_be32(sess->back_channel.maxops);
3693 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3694 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3695
3696 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3697 p = xdr_reserve_space(xdr, 4);
3698 if (!p)
3699 return nfserr_resource;
c373b0a4 3700 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3701 }
3702 return 0;
2db134eb
AA		 3703}
3704
c47d832b 3705static __be32
57b7b43b 3706nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3707 struct nfsd4_sequence *seq)
3708{
d0a381dd 3709 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3710 __be32 *p;
b85d4c01
BH		 3711
3712 if (nfserr)
3713 return nfserr;
3714
d0a381dd
BF		 3715 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3716 if (!p)
3717 return nfserr_resource;
0c0c267b
BF		 3718 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3719 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3720 *p++ = cpu_to_be32(seq->seqid);
3721 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3722 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3723 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3724 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3725 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3726
f5236013 3727 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3728 return 0;
2db134eb
AA		 3729}
3730
2355c596 3731static __be32
57b7b43b 3732nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3733 struct nfsd4_test_stateid *test_stateid)
3734{
d0a381dd 3735 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3736 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3737 __be32 *p;
17456804 3738
a11fcce1
BF		 3739 if (nfserr)
3740 return nfserr;
3741
d0a381dd
BF		 3742 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3743 if (!p)
3744 return nfserr_resource;
17456804 3745 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3746
03cfb420 3747 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3748 *p++ = stateid->ts_id_status;
17456804 3749 }
17456804
BS		 3750
3751 return nfserr;
3752}
3753
695e12f8
BH		 3754static __be32
3755nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3756{
3757 return nfserr;
3758}
3759
3760typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3761
2db134eb
AA		 3762/*
3763 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3764 * since we don't need to filter out obsolete ops as this is
3765 * done in the decoding phase.
3766 */
695e12f8 3767static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3768 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3769 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3770 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3771 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3772 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3773 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3774 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3775 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3776 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3777 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3778 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3779 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3780 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3781 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3782 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3783 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3784 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3785 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3786 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3787 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3788 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3789 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3790 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3791 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3792 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3793 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3794 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3795 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3796 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3797 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3798 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3799 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3800 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3801 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3802 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3803 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3804 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3805
3806 /* NFSv4.1 operations */
3807 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3808 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3809 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3810 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3811 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3812 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3813 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3817 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3818 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3819 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3820 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3821 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3822 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3823 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3824 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3825 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3826};
3827
496c262c 3828/*
a8095f7e
BF		 3829 * Calculate whether we still have space to encode repsize bytes.
3830 * There are two considerations:
3831 * - For NFS versions >=4.1, the size of the reply must stay within
3832 * session limits
3833 * - For all NFS versions, we must stay within limited preallocated
3834 * buffer space.
496c262c 3835 *
a8095f7e
BF		 3836 * This is called before the operation is processed, so can only provide
3837 * an upper estimate. For some nonidempotent operations (such as
3838 * getattr), it's not necessarily a problem if that estimate is wrong,
3839 * as we can fail it after processing without significant side effects.
496c262c 3840 */
a8095f7e 3841__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3842{
67492c99 3843 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3844 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3845
47ee5298
BF		 3846 if (buf->len + respsize <= buf->buflen)
3847 return nfs_ok;
3848 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3849 return nfserr_resource;
47ee5298
BF		 3850 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3851 WARN_ON_ONCE(1);
3852 return nfserr_rep_too_big_to_cache;
ea8d7720 3853 }
47ee5298 3854 return nfserr_rep_too_big;
496c262c
AA		 3855}
3856
1da177e4
LT		 3857void
3858nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3859{
082d4bd7 3860 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3861 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3862 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3863 int post_err_offset;
07d1f802 3864 nfsd4_enc encoder;
bc749ca4 3865 __be32 *p;
1da177e4 3866
d0a381dd
BF		 3867 p = xdr_reserve_space(xdr, 8);
3868 if (!p) {
3869 WARN_ON_ONCE(1);
3870 return;
3871 }
c373b0a4 3872 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3873 post_err_offset = xdr->buf->len;
1da177e4 3874
695e12f8
BH		 3875 if (op->opnum == OP_ILLEGAL)
3876 goto status;
3877 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3878 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3879 encoder = nfsd4_enc_ops[op->opnum];
3880 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3881 xdr_commit_encode(xdr);
3882
067e1ace 3883 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3884 if (!op->status) {
3885 int space_needed = 0;
3886 if (!nfsd4_last_compound_op(rqstp))
3887 space_needed = COMPOUND_ERR_SLACK_SPACE;
3888 op->status = nfsd4_check_resp_size(resp, space_needed);
3889 }
c8f13d97
BF		 3890 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3891 struct nfsd4_slot *slot = resp->cstate.slot;
3892
3893 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3894 op->status = nfserr_rep_too_big_to_cache;
3895 else
3896 op->status = nfserr_rep_too_big;
3897 }
07d1f802
BF		 3898 if (op->status == nfserr_resource ||
3899 op->status == nfserr_rep_too_big ||
3900 op->status == nfserr_rep_too_big_to_cache) {
3901 /*
3902 * The operation may have already been encoded or
3903 * partially encoded. No op returns anything additional
3904 * in the case of one of these three errors, so we can
3905 * just truncate back to after the status. But it's a
3906 * bug if we had to do this on a non-idempotent op:
3907 */
3908 warn_on_nonidempotent_op(op);
082d4bd7 3909 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3910 }
9411b1d4 3911 if (so) {
082d4bd7
BF		 3912 int len = xdr->buf->len - post_err_offset;
3913
9411b1d4 3914 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3915 so->so_replay.rp_buflen = len;
3916 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3917 so->so_replay.rp_buf, len);
9411b1d4 3918 }
695e12f8 3919status:
082d4bd7
BF		 3920 /* Note that op->status is already in network byte order: */
3921 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3922}
3923
3924/*
3925 * Encode the reply stored in the stateowner reply cache
3926 *
3927 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3928 * previously sent already encoded operation.
3929 *
3930 * called with nfs4_lock_state() held
3931 */
3932void
d0a381dd 3933nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3934{
bc749ca4 3935 __be32 *p;
1da177e4
LT		 3936 struct nfs4_replay *rp = op->replay;
3937
3938 BUG_ON(!rp);
3939
d0a381dd
BF		 3940 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3941 if (!p) {
3942 WARN_ON_ONCE(1);
3943 return;
3944 }
c373b0a4 3945 *p++ = cpu_to_be32(op->opnum);
1da177e4 3946 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3947
0c0c267b 3948 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3949}
3950
1da177e4 3951int
2ebbc012 3952nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3953{
3954 return xdr_ressize_check(rqstp, p);
3955}
3956
3e98abff 3957int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3958{
3e98abff
BF		 3959 struct svc_rqst *rqstp = rq;
3960 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3961
1da177e4
LT		 3962 if (args->ops != args->iops) {
3963 kfree(args->ops);
3964 args->ops = args->iops;
3965 }
f99d49ad
JJ		 3966 kfree(args->tmpp);
3967 args->tmpp = NULL;
1da177e4 3968 while (args->to_free) {
d5e23383 3969 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 3970 args->to_free = tb->next;
1da177e4
LT		 3971 kfree(tb);
3972 }
3e98abff 3973 return 1;
1da177e4
LT		 3974}
3975
3976int
2ebbc012 3977nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3978{
e874f9f8
JL		 3979 if (rqstp->rq_arg.head[0].iov_len % 4) {
3980 /* client is nuts */
3981 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3982 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3983 return 0;
3984 }
1da177e4
LT		 3985 args->p = p;
3986 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3987 args->pagelist = rqstp->rq_arg.pages;
3988 args->pagelen = rqstp->rq_arg.page_len;
3989 args->tmpp = NULL;
3990 args->to_free = NULL;
3991 args->ops = args->iops;
3992 args->rqstp = rqstp;
3993
3e98abff 3994 return !nfsd4_decode_compound(args);
1da177e4
LT		 3995}
3996
3997int
2ebbc012 3998nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3999{
4000 /*
4001 * All that remains is to write the tag and operation count...
4002 */
557ce264 4003 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4004 struct xdr_buf *buf = resp->xdr.buf;
4005
4006 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4007 buf->tail[0].iov_len);
dd97fdde 4008
2825a7f9
BF		 4009 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4010
1da177e4
LT		 4011 p = resp->tagp;
4012 *p++ = htonl(resp->taglen);
4013 memcpy(p, resp->tag, resp->taglen);
4014 p += XDR_QUADLEN(resp->taglen);
4015 *p++ = htonl(resp->opcnt);
4016
26c0c75e 4017 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4018 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4019 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4020 if (cs->status != nfserr_replay_cache) {
4021 nfsd4_store_cache_entry(resp);
73e79482 4022 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4023 }
d7682988 4024 /* Renew the clientid on success and on replay */
f0f51f5c 4025 spin_lock(&nn->client_lock);
221a6876 4026 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4027 spin_unlock(&nn->client_lock);
4028 put_client_renew(clp);
da3846a2 4029 }
1da177e4
LT		 4030 return 1;
4031}
4032
4033/*
4034 * Local variables:
4035 * c-basic-offset: 8
4036 * End:
4037 */
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