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nfsd4: remove unused defer_free argument
[linux-block.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
CH		 183/**
184 * defer_free - mark an allocation as deferred freed
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 */
1da177e4 191static int
ce043ac8 192defer_free(struct nfsd4_compoundargs *argp, void *p)
1da177e4
LT		 193{
194 struct tmpbuf *tb;
195
196 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
197 if (!tb)
198 return -ENOMEM;
199 tb->buf = p;
1da177e4
LT		 200 tb->next = argp->to_free;
201 argp->to_free = tb;
202 return 0;
203}
204
2d8498db
CH		 205/**
206 * savemem - duplicate a chunk of memory for later processing
207 * @argp: NFSv4 compound argument structure to be freed with
208 * @p: pointer to be duplicated
209 * @nbytes: length to be duplicated
210 *
211 * Returns a pointer to a copy of @nbytes bytes of memory at @p
212 * that are preserved until processing of the NFSv4 compound
213 * operation described by @argp finishes.
214 */
2ebbc012 215static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 216{
1da177e4 217 if (p == argp->tmp) {
67114fe6 218 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 219 if (!p)
220 return NULL;
1da177e4 221 } else {
73dff8be 222 BUG_ON(p != argp->tmpp);
1da177e4
LT		 223 argp->tmpp = NULL;
224 }
ce043ac8 225 if (defer_free(argp, p)) {
a4db5fe5 226 kfree(p);
1da177e4
LT		 227 return NULL;
228 } else
229 return (char *)p;
230}
231
b37ad28b 232static __be32
1da177e4
LT		 233nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
234{
235 u32 bmlen;
236 DECODE_HEAD;
237
238 bmval[0] = 0;
239 bmval[1] = 0;
7e705706 240 bmval[2] = 0;
1da177e4
LT		 241
242 READ_BUF(4);
06553991 243 bmlen = be32_to_cpup(p++);
1da177e4
LT		 244 if (bmlen > 1000)
245 goto xdr_error;
246
247 READ_BUF(bmlen << 2);
248 if (bmlen > 0)
06553991 249 bmval[0] = be32_to_cpup(p++);
1da177e4 250 if (bmlen > 1)
06553991 251 bmval[1] = be32_to_cpup(p++);
7e705706 252 if (bmlen > 2)
06553991 253 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 254
255 DECODE_TAIL;
256}
257
b37ad28b 258static __be32
3c8e0316 259nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 260 struct iattr *iattr, struct nfs4_acl **acl,
261 struct xdr_netobj *label)
1da177e4
LT		 262{
263 int expected_len, len = 0;
264 u32 dummy32;
542d1ab3 265 u64 sec;
1da177e4
LT		 266 char *buf;
267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
1da177e4 273 READ_BUF(4);
06553991 274 expected_len = be32_to_cpup(p++);
1da177e4
LT		 275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
542d1ab3 279 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 283 u32 nace;
28e05dd8 284 struct nfs4_ace *ace;
1da177e4
LT		 285
286 READ_BUF(4); len += 4;
06553991 287 nace = be32_to_cpup(p++);
1da177e4 288
28e05dd8 289 if (nace > NFS4_ACL_MAX)
798df338 290 return nfserr_fbig;
28e05dd8
BF		 291
292 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 293 if (*acl == NULL)
294 return nfserr_jukebox;
295
ce043ac8 296 defer_free(argp, *acl);
1da177e4 297
28e05dd8
BF		 298 (*acl)->naces = nace;
299 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 300 READ_BUF(16); len += 16;
06553991
BF		 301 ace->type = be32_to_cpup(p++);
302 ace->flag = be32_to_cpup(p++);
303 ace->access_mask = be32_to_cpup(p++);
304 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 305 READ_BUF(dummy32);
306 len += XDR_QUADLEN(dummy32) << 2;
307 READMEM(buf, dummy32);
28e05dd8 308 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 309 status = nfs_ok;
28e05dd8 310 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 311 ;
28e05dd8 312 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 313 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 314 buf, dummy32, &ace->who_gid);
1da177e4 315 else
3c726023 316 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 317 buf, dummy32, &ace->who_uid);
3c726023
BF		 318 if (status)
319 return status;
1da177e4
LT		 320 }
321 } else
322 *acl = NULL;
323 if (bmval[1] & FATTR4_WORD1_MODE) {
324 READ_BUF(4);
325 len += 4;
06553991 326 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 327 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
328 iattr->ia_valid |= ATTR_MODE;
329 }
330 if (bmval[1] & FATTR4_WORD1_OWNER) {
331 READ_BUF(4);
332 len += 4;
06553991 333 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 334 READ_BUF(dummy32);
335 len += (XDR_QUADLEN(dummy32) << 2);
336 READMEM(buf, dummy32);
47c85291
N		 337 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
338 return status;
1da177e4
LT		 339 iattr->ia_valid |= ATTR_UID;
340 }
341 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
342 READ_BUF(4);
343 len += 4;
06553991 344 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 345 READ_BUF(dummy32);
346 len += (XDR_QUADLEN(dummy32) << 2);
347 READMEM(buf, dummy32);
47c85291
N		 348 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
349 return status;
1da177e4
LT		 350 iattr->ia_valid |= ATTR_GID;
351 }
352 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
353 READ_BUF(4);
354 len += 4;
06553991 355 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 356 switch (dummy32) {
357 case NFS4_SET_TO_CLIENT_TIME:
358 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
359 all 32 bits of 'nseconds'. */
360 READ_BUF(12);
361 len += 12;
542d1ab3
BF		 362 p = xdr_decode_hyper(p, &sec);
363 iattr->ia_atime.tv_sec = (time_t)sec;
06553991 364 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 365 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
366 return nfserr_inval;
367 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
368 break;
369 case NFS4_SET_TO_SERVER_TIME:
370 iattr->ia_valid |= ATTR_ATIME;
371 break;
372 default:
373 goto xdr_error;
374 }
375 }
1da177e4
LT		 376 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
377 READ_BUF(4);
378 len += 4;
06553991 379 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 380 switch (dummy32) {
381 case NFS4_SET_TO_CLIENT_TIME:
382 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
383 all 32 bits of 'nseconds'. */
384 READ_BUF(12);
385 len += 12;
542d1ab3
BF		 386 p = xdr_decode_hyper(p, &sec);
387 iattr->ia_mtime.tv_sec = sec;
06553991 388 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 389 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
390 return nfserr_inval;
391 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
392 break;
393 case NFS4_SET_TO_SERVER_TIME:
394 iattr->ia_valid |= ATTR_MTIME;
395 break;
396 default:
397 goto xdr_error;
398 }
399 }
18032ca0
DQ		 400
401 label->len = 0;
402#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
403 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
404 READ_BUF(4);
405 len += 4;
06553991 406 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 407 READ_BUF(4);
408 len += 4;
06553991 409 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 410 READ_BUF(4);
411 len += 4;
06553991 412 dummy32 = be32_to_cpup(p++);
18032ca0
DQ		 413 READ_BUF(dummy32);
414 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
415 return nfserr_badlabel;
416 len += (XDR_QUADLEN(dummy32) << 2);
417 READMEM(buf, dummy32);
418 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
419 if (!label->data)
420 return nfserr_jukebox;
3378b7f4 421 label->len = dummy32;
ce043ac8 422 defer_free(argp, label->data);
18032ca0
DQ		 423 memcpy(label->data, buf, dummy32);
424 }
425#endif
426
3c8e0316
YZ		 427 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
428 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
429 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
430 READ_BUF(expected_len - len);
431 else if (len != expected_len)
1da177e4
LT		 432 goto xdr_error;
433
434 DECODE_TAIL;
1da177e4
LT		 435}
436
e31a1b66
BH		 437static __be32
438nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
439{
440 DECODE_HEAD;
441
442 READ_BUF(sizeof(stateid_t));
06553991 443 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 444 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
445
446 DECODE_TAIL;
447}
448
b37ad28b 449static __be32
1da177e4
LT		 450nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
451{
452 DECODE_HEAD;
453
454 READ_BUF(4);
06553991 455 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 456
457 DECODE_TAIL;
458}
459
acb2887e
BF		 460static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
461{
462 DECODE_HEAD;
12fc3e92 463 u32 dummy, uid, gid;
acb2887e
BF		 464 char *machine_name;
465 int i;
466 int nr_secflavs;
467
468 /* callback_sec_params4 */
469 READ_BUF(4);
06553991 470 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 471 if (nr_secflavs)
472 cbs->flavor = (u32)(-1);
473 else
474 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
475 cbs->flavor = 0;
acb2887e
BF		 476 for (i = 0; i < nr_secflavs; ++i) {
477 READ_BUF(4);
06553991 478 dummy = be32_to_cpup(p++);
acb2887e
BF		 479 switch (dummy) {
480 case RPC_AUTH_NULL:
481 /* Nothing to read */
12fc3e92
BF		 482 if (cbs->flavor == (u32)(-1))
483 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 484 break;
485 case RPC_AUTH_UNIX:
486 READ_BUF(8);
487 /* stamp */
06553991 488 dummy = be32_to_cpup(p++);
acb2887e
BF		 489
490 /* machine name */
06553991 491 dummy = be32_to_cpup(p++);
acb2887e
BF		 492 READ_BUF(dummy);
493 SAVEMEM(machine_name, dummy);
494
495 /* uid, gid */
496 READ_BUF(8);
06553991
BF		 497 uid = be32_to_cpup(p++);
498 gid = be32_to_cpup(p++);
acb2887e
BF		 499
500 /* more gids */
501 READ_BUF(4);
06553991 502 dummy = be32_to_cpup(p++);
acb2887e 503 READ_BUF(dummy * 4);
12fc3e92 504 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 505 kuid_t kuid = make_kuid(&init_user_ns, uid);
506 kgid_t kgid = make_kgid(&init_user_ns, gid);
507 if (uid_valid(kuid) && gid_valid(kgid)) {
508 cbs->uid = kuid;
509 cbs->gid = kgid;
510 cbs->flavor = RPC_AUTH_UNIX;
511 } else {
512 dprintk("RPC_AUTH_UNIX with invalid"
513 "uid or gid ignoring!\n");
514 }
12fc3e92 515 }
acb2887e
BF		 516 break;
517 case RPC_AUTH_GSS:
518 dprintk("RPC_AUTH_GSS callback secflavor "
519 "not supported!\n");
520 READ_BUF(8);
521 /* gcbp_service */
06553991 522 dummy = be32_to_cpup(p++);
acb2887e 523 /* gcbp_handle_from_server */
06553991 524 dummy = be32_to_cpup(p++);
acb2887e
BF		 525 READ_BUF(dummy);
526 p += XDR_QUADLEN(dummy);
527 /* gcbp_handle_from_client */
528 READ_BUF(4);
06553991 529 dummy = be32_to_cpup(p++);
acb2887e
BF		 530 READ_BUF(dummy);
531 break;
532 default:
533 dprintk("Illegal callback secflavor\n");
534 return nfserr_inval;
535 }
536 }
537 DECODE_TAIL;
538}
539
cb73a9f4
BF		 540static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
541{
542 DECODE_HEAD;
543
544 READ_BUF(4);
06553991 545 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 546 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
547
548 DECODE_TAIL;
549}
550
1d1bc8f2
BF		 551static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
552{
553 DECODE_HEAD;
1d1bc8f2
BF		 554
555 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
556 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 557 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 558 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
559 * could help us figure out we should be using it. */
1d1bc8f2
BF		 560 DECODE_TAIL;
561}
562
b37ad28b 563static __be32
1da177e4
LT		 564nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
565{
566 DECODE_HEAD;
567
e31a1b66 568 READ_BUF(4);
06553991 569 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 570 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 571
572 DECODE_TAIL;
573}
574
575
b37ad28b 576static __be32
1da177e4
LT		 577nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
578{
579 DECODE_HEAD;
580
581 READ_BUF(12);
542d1ab3 582 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 583 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 584
585 DECODE_TAIL;
586}
587
b37ad28b 588static __be32
1da177e4
LT		 589nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
590{
591 DECODE_HEAD;
592
593 READ_BUF(4);
06553991 594 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 595 switch (create->cr_type) {
596 case NF4LNK:
597 READ_BUF(4);
7fb84306
BF		 598 create->cr_datalen = be32_to_cpup(p++);
599 READ_BUF(create->cr_datalen);
b829e919
BF		 600 /*
601 * The VFS will want a null-terminated string, and
602 * null-terminating in place isn't safe since this might
603 * end on a page boundary:
604 */
7fb84306
BF		 605 create->cr_data = kmalloc(create->cr_datalen + 1, GFP_KERNEL);
606 if (!create->cr_data)
b829e919 607 return nfserr_jukebox;
7fb84306
BF		 608 memcpy(create->cr_data, p, create->cr_datalen);
609 create->cr_data[create->cr_datalen] = '\0';
ce043ac8 610 defer_free(argp, create->cr_data);
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++) {
03cfb420
BS		 1480 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1481 if (!stateid) {
afcf6792 1482 status = nfserrno(-ENOMEM);
03cfb420
BS		 1483 goto out;
1484 }
1485
ce043ac8 1486 defer_free(argp, stateid);
03cfb420
BS		 1487 INIT_LIST_HEAD(&stateid->ts_id_list);
1488 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1489
1490 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1491 if (status)
03cfb420 1492 goto out;
17456804
BS		 1493 }
1494
1495 status = 0;
1496out:
1497 return status;
1498xdr_error:
1499 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1500 status = nfserr_bad_xdr;
1501 goto out;
1502}
1503
345c2842
MJ		 1504static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1505{
1506 DECODE_HEAD;
1507
1508 READ_BUF(8);
1509 COPYMEM(&dc->clientid, 8);
1510
1511 DECODE_TAIL;
1512}
1513
4dc6ec00
BF		 1514static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1515{
1516 DECODE_HEAD;
1517
1518 READ_BUF(4);
06553991 1519 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1520
1521 DECODE_TAIL;
1522}
1523
347e0ad9
BH		 1524static __be32
1525nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1526{
1527 return nfs_ok;
1528}
1529
3c375c6f
BH		 1530static __be32
1531nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1532{
1e685ec2 1533 return nfserr_notsupp;
3c375c6f
BH		 1534}
1535
347e0ad9
BH		 1536typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1537
1538static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1539 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1540 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1541 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1542 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1543 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1544 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1545 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1546 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1547 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1548 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1549 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1550 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1551 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1552 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1553 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1554 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1555 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1556 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1557 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1558 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1559 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1560 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1561 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1562 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1563 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1565 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1566 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1567 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1568 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1569 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1570 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1571 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1572 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1573 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1574 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1575 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1576
1577 /* new operations for NFSv4.1 */
cb73a9f4 1578 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1579 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1580 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1581 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1582 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1583 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1584 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1586 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1587 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1590 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1591 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1592 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1593 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1594 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1595 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1596 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1597};
1598
e1a90ebd
AS		 1599static inline bool
1600nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1601{
8217d146 1602 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1603 return false;
8217d146 1604 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1605 return false;
8217d146
AS		 1606 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1607 return false;
1608 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1609 return false;
1610 return true;
1611}
f2feb96b 1612
b37ad28b 1613static __be32
1da177e4
LT		 1614nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1615{
1616 DECODE_HEAD;
1617 struct nfsd4_op *op;
1091006c 1618 bool cachethis = false;
a5cddc88
BF		 1619 int auth_slack= argp->rqstp->rq_auth_slack;
1620 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1621 int readcount = 0;
1622 int readbytes = 0;
1da177e4
LT		 1623 int i;
1624
1da177e4 1625 READ_BUF(4);
06553991 1626 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1627 READ_BUF(argp->taglen + 8);
1628 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1629 argp->minorversion = be32_to_cpup(p++);
1630 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1631 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1632
1633 if (argp->taglen > NFSD4_MAX_TAGLEN)
1634 goto xdr_error;
1635 if (argp->opcnt > 100)
1636 goto xdr_error;
1637
e8c96f8c 1638 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1639 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1640 if (!argp->ops) {
1641 argp->ops = argp->iops;
817cb9d4 1642 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1643 goto xdr_error;
1644 }
1645 }
1646
e1a90ebd 1647 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1648 argp->opcnt = 0;
1649
1da177e4
LT		 1650 for (i = 0; i < argp->opcnt; i++) {
1651 op = &argp->ops[i];
1652 op->replay = NULL;
1653
8a61b18c 1654 READ_BUF(4);
06553991 1655 op->opnum = be32_to_cpup(p++);
1da177e4 1656
e1a90ebd
AS		 1657 if (nfsd4_opnum_in_range(argp, op))
1658 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1659 else {
1da177e4
LT		 1660 op->opnum = OP_ILLEGAL;
1661 op->status = nfserr_op_illegal;
1da177e4 1662 }
1091006c
BF		 1663 /*
1664 * We'll try to cache the result in the DRC if any one
1665 * op in the compound wants to be cached:
1666 */
1667 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1668
b0e35fda
BF		 1669 if (op->opnum == OP_READ) {
1670 readcount++;
1671 readbytes += nfsd4_max_reply(argp->rqstp, op);
1672 } else
1673 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1674
1675 if (op->status) {
1676 argp->opcnt = i+1;
1677 break;
1678 }
1da177e4 1679 }
1091006c
BF		 1680 /* Sessions make the DRC unnecessary: */
1681 if (argp->minorversion)
1682 cachethis = false;
b0e35fda 1683 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1684 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1685
a5cddc88 1686 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
b0e35fda
BF		 1687 argp->rqstp->rq_splice_ok = false;
1688
1da177e4
LT		 1689 DECODE_TAIL;
1690}
1da177e4 1691
d05d5744 1692static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1693{
1694 if (IS_I_VERSION(inode)) {
d05d5744 1695 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1696 } else {
d05d5744
BF		 1697 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1698 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1699 }
d05d5744 1700 return p;
c654b8a9
BF		 1701}
1702
d05d5744 1703static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1704{
d05d5744 1705 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1706 if (c->change_supported) {
d05d5744
BF		 1707 p = xdr_encode_hyper(p, c->before_change);
1708 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1709 } else {
d05d5744
BF		 1710 *p++ = cpu_to_be32(c->before_ctime_sec);
1711 *p++ = cpu_to_be32(c->before_ctime_nsec);
1712 *p++ = cpu_to_be32(c->after_ctime_sec);
1713 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1714 }
d05d5744 1715 return p;
c654b8a9 1716}
1da177e4 1717
81c3f413 1718/* Encode as an array of strings the string given with components
e7a0444a 1719 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1720 */
ddd1ea56
BF		 1721static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1722 char *components, char esc_enter,
1723 char esc_exit)
81c3f413 1724{
ddd1ea56 1725 __be32 *p;
082d4bd7
BF		 1726 __be32 pathlen;
1727 int pathlen_offset;
81c3f413 1728 int strlen, count=0;
e7a0444a 1729 char *str, *end, *next;
81c3f413
BF		 1730
1731 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1732
1733 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1734 p = xdr_reserve_space(xdr, 4);
1735 if (!p)
81c3f413 1736 return nfserr_resource;
082d4bd7
BF		 1737 p++; /* We will fill this in with @count later */
1738
81c3f413
BF		 1739 end = str = components;
1740 while (*end) {
e7a0444a
WAA		 1741 bool found_esc = false;
1742
1743 /* try to parse as esc_start, ..., esc_end, sep */
1744 if (*str == esc_enter) {
1745 for (; *end && (*end != esc_exit); end++)
1746 /* find esc_exit or end of string */;
1747 next = end + 1;
1748 if (*end && (!*next || *next == sep)) {
1749 str++;
1750 found_esc = true;
1751 }
1752 }
1753
1754 if (!found_esc)
1755 for (; *end && (*end != sep); end++)
1756 /* find sep or end of string */;
1757
81c3f413
BF		 1758 strlen = end - str;
1759 if (strlen) {
ddd1ea56
BF		 1760 p = xdr_reserve_space(xdr, strlen + 4);
1761 if (!p)
81c3f413 1762 return nfserr_resource;
0c0c267b 1763 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1764 count++;
1765 }
1766 else
1767 end++;
1768 str = end;
1769 }
082d4bd7
BF		 1770 pathlen = htonl(xdr->buf->len - pathlen_offset);
1771 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1772 return 0;
1773}
1774
e7a0444a
WAA		 1775/* Encode as an array of strings the string given with components
1776 * separated @sep.
1777 */
ddd1ea56
BF		 1778static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1779 char *components)
e7a0444a 1780{
ddd1ea56 1781 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1782}
1783
81c3f413
BF		 1784/*
1785 * encode a location element of a fs_locations structure
1786 */
ddd1ea56
BF		 1787static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1788 struct nfsd4_fs_location *location)
81c3f413 1789{
b37ad28b 1790 __be32 status;
81c3f413 1791
ddd1ea56 1792 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1793 '[', ']');
81c3f413
BF		 1794 if (status)
1795 return status;
ddd1ea56 1796 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1797 if (status)
1798 return status;
81c3f413
BF		 1799 return 0;
1800}
1801
1802/*
ed748aac 1803 * Encode a path in RFC3530 'pathname4' format
81c3f413 1804 */
ddd1ea56
BF		 1805static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1806 const struct path *root,
1807 const struct path *path)
81c3f413 1808{
301f0268 1809 struct path cur = *path;
ddd1ea56 1810 __be32 *p;
ed748aac
TM		 1811 struct dentry **components = NULL;
1812 unsigned int ncomponents = 0;
1813 __be32 err = nfserr_jukebox;
81c3f413 1814
ed748aac 1815 dprintk("nfsd4_encode_components(");
81c3f413 1816
ed748aac
TM		 1817 path_get(&cur);
1818 /* First walk the path up to the nfsd root, and store the
1819 * dentries/path components in an array.
1820 */
1821 for (;;) {
1822 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1823 break;
1824 if (cur.dentry == cur.mnt->mnt_root) {
1825 if (follow_up(&cur))
1826 continue;
1827 goto out_free;
1828 }
1829 if ((ncomponents & 15) == 0) {
1830 struct dentry **new;
1831 new = krealloc(components,
1832 sizeof(*new) * (ncomponents + 16),
1833 GFP_KERNEL);
1834 if (!new)
1835 goto out_free;
1836 components = new;
1837 }
1838 components[ncomponents++] = cur.dentry;
1839 cur.dentry = dget_parent(cur.dentry);
1840 }
ddd1ea56
BF		 1841 err = nfserr_resource;
1842 p = xdr_reserve_space(xdr, 4);
1843 if (!p)
ed748aac 1844 goto out_free;
c373b0a4 1845 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1846
1847 while (ncomponents) {
1848 struct dentry *dentry = components[ncomponents - 1];
301f0268 1849 unsigned int len;
ed748aac 1850
301f0268
AV		 1851 spin_lock(&dentry->d_lock);
1852 len = dentry->d_name.len;
ddd1ea56
BF		 1853 p = xdr_reserve_space(xdr, len + 4);
1854 if (!p) {
301f0268 1855 spin_unlock(&dentry->d_lock);
ed748aac 1856 goto out_free;
301f0268 1857 }
0c0c267b 1858 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1859 dprintk("/%s", dentry->d_name.name);
301f0268 1860 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1861 dput(dentry);
1862 ncomponents--;
81c3f413 1863 }
ed748aac 1864
ed748aac
TM		 1865 err = 0;
1866out_free:
1867 dprintk(")\n");
1868 while (ncomponents)
1869 dput(components[--ncomponents]);
1870 kfree(components);
1871 path_put(&cur);
1872 return err;
1873}
1874
ddd1ea56
BF		 1875static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1876 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1877{
1878 struct svc_export *exp_ps;
1879 __be32 res;
1880
1881 exp_ps = rqst_find_fsidzero_export(rqstp);
1882 if (IS_ERR(exp_ps))
1883 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1884 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1885 exp_put(exp_ps);
1886 return res;
81c3f413
BF		 1887}
1888
1889/*
1890 * encode a fs_locations structure
1891 */
ddd1ea56
BF		 1892static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1893 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1894{
b37ad28b 1895 __be32 status;
cc45f017 1896 int i;
ddd1ea56 1897 __be32 *p;
81c3f413 1898 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1899
ddd1ea56 1900 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1901 if (status)
1902 return status;
ddd1ea56
BF		 1903 p = xdr_reserve_space(xdr, 4);
1904 if (!p)
81c3f413 1905 return nfserr_resource;
c373b0a4 1906 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1907 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1908 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1909 if (status)
1910 return status;
1911 }
81c3f413
BF		 1912 return 0;
1913}
1da177e4 1914
3d2544b1
BF		 1915static u32 nfs4_file_type(umode_t mode)
1916{
1917 switch (mode & S_IFMT) {
1918 case S_IFIFO: return NF4FIFO;
1919 case S_IFCHR: return NF4CHR;
1920 case S_IFDIR: return NF4DIR;
1921 case S_IFBLK: return NF4BLK;
1922 case S_IFLNK: return NF4LNK;
1923 case S_IFREG: return NF4REG;
1924 case S_IFSOCK: return NF4SOCK;
1925 default: return NF4BAD;
1926 };
1927}
1da177e4 1928
b37ad28b 1929static inline __be32
ddd1ea56
BF		 1930nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1931 struct nfs4_ace *ace)
1da177e4 1932{
3554116d 1933 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1934 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1935 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1936 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1937 else
ddd1ea56 1938 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1939}
1940
42ca0993
BF		 1941#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1942 FATTR4_WORD0_RDATTR_ERROR)
1943#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1944
18032ca0
DQ		 1945#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1946static inline __be32
ddd1ea56
BF		 1947nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1948 void *context, int len)
18032ca0 1949{
ddd1ea56 1950 __be32 *p;
18032ca0 1951
ddd1ea56
BF		 1952 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1953 if (!p)
18032ca0
DQ		 1954 return nfserr_resource;
1955
1956 /*
1957 * For now we use a 0 here to indicate the null translation; in
1958 * the future we may place a call to translation code here.
1959 */
c373b0a4
BF		 1960 *p++ = cpu_to_be32(0); /* lfs */
1961 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1962 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1963 return 0;
1964}
1965#else
1966static inline __be32
ddd1ea56
BF		 1967nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1968 void *context, int len)
18032ca0
DQ		 1969{ return 0; }
1970#endif
1971
b37ad28b 1972static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1973{
1974 /* As per referral draft: */
1975 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1976 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1977 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1978 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1979 *rdattr_err = NFSERR_MOVED;
1980 else
1981 return nfserr_moved;
1982 }
1983 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1984 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1985 return 0;
1986}
1da177e4 1987
ae7095a7
BF		 1988
1989static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1990{
1991 struct path path = exp->ex_path;
1992 int err;
1993
1994 path_get(&path);
1995 while (follow_up(&path)) {
1996 if (path.dentry != path.mnt->mnt_root)
1997 break;
1998 }
3dadecce 1999 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2000 path_put(&path);
2001 return err;
2002}
2003
1da177e4
LT		 2004/*
2005 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2006 * ourselves.
1da177e4 2007 */
da2ebce6 2008static __be32
d5184658
BF		 2009nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2010 struct svc_export *exp,
2011 struct dentry *dentry, u32 *bmval,
406a7ea9 2012 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2013{
2014 u32 bmval0 = bmval[0];
2015 u32 bmval1 = bmval[1];
7e705706 2016 u32 bmval2 = bmval[2];
1da177e4 2017 struct kstat stat;
d50e6136 2018 struct svc_fh *tempfh = NULL;
1da177e4 2019 struct kstatfs statfs;
ddd1ea56 2020 __be32 *p;
1fcea5b2 2021 int starting_len = xdr->buf->len;
082d4bd7
BF		 2022 int attrlen_offset;
2023 __be32 attrlen;
1da177e4
LT		 2024 u32 dummy;
2025 u64 dummy64;
42ca0993 2026 u32 rdattr_err = 0;
b37ad28b 2027 __be32 status;
b8dd7b9a 2028 int err;
1da177e4
LT		 2029 int aclsupport = 0;
2030 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2031 void *context = NULL;
2032 int contextlen;
2033 bool contextsupport = false;
7e705706
AA		 2034 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2035 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2036 struct path path = {
2037 .mnt = exp->ex_path.mnt,
2038 .dentry = dentry,
2039 };
3d733711 2040 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2041
2042 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2043 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2044 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2045 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2046
42ca0993 2047 if (exp->ex_fslocs.migrated) {
7e705706 2048 BUG_ON(bmval[2]);
42ca0993
BF		 2049 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2050 if (status)
2051 goto out;
2052 }
2053
3dadecce 2054 err = vfs_getattr(&path, &stat);
b8dd7b9a 2055 if (err)
1da177e4 2056 goto out_nfserr;
12337901
CH		 2057 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2058 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2059 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2060 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2061 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2062 if (err)
1da177e4
LT		 2063 goto out_nfserr;
2064 }
2065 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2066 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2067 status = nfserr_jukebox;
2068 if (!tempfh)
2069 goto out;
2070 fh_init(tempfh, NFS4_FHSIZE);
2071 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2072 if (status)
2073 goto out;
d50e6136 2074 fhp = tempfh;
1da177e4
LT		 2075 }
2076 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2077 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2078 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2079 aclsupport = (err == 0);
1da177e4 2080 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2081 if (err == -EOPNOTSUPP)
1da177e4 2082 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2083 else if (err == -EINVAL) {
1da177e4
LT		 2084 status = nfserr_attrnotsupp;
2085 goto out;
b8dd7b9a 2086 } else if (err != 0)
1da177e4
LT		 2087 goto out_nfserr;
2088 }
2089 }
1da177e4 2090
18032ca0
DQ		 2091#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2092 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2093 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2094 err = security_inode_getsecctx(dentry->d_inode,
2095 &context, &contextlen);
2096 contextsupport = (err == 0);
2097 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2098 if (err == -EOPNOTSUPP)
2099 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2100 else if (err)
2101 goto out_nfserr;
2102 }
2103 }
2104#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2105
2b44f1ba 2106 if (bmval2) {
ddd1ea56
BF		 2107 p = xdr_reserve_space(xdr, 16);
2108 if (!p)
2b44f1ba 2109 goto out_resource;
c373b0a4
BF		 2110 *p++ = cpu_to_be32(3);
2111 *p++ = cpu_to_be32(bmval0);
2112 *p++ = cpu_to_be32(bmval1);
2113 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2114 } else if (bmval1) {
ddd1ea56
BF		 2115 p = xdr_reserve_space(xdr, 12);
2116 if (!p)
2b44f1ba 2117 goto out_resource;
c373b0a4
BF		 2118 *p++ = cpu_to_be32(2);
2119 *p++ = cpu_to_be32(bmval0);
2120 *p++ = cpu_to_be32(bmval1);
7e705706 2121 } else {
ddd1ea56
BF		 2122 p = xdr_reserve_space(xdr, 8);
2123 if (!p)
2b44f1ba 2124 goto out_resource;
c373b0a4
BF		 2125 *p++ = cpu_to_be32(1);
2126 *p++ = cpu_to_be32(bmval0);
7e705706 2127 }
082d4bd7
BF		 2128
2129 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2130 p = xdr_reserve_space(xdr, 4);
2131 if (!p)
2132 goto out_resource;
082d4bd7 2133 p++; /* to be backfilled later */
1da177e4
LT		 2134
2135 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2136 u32 word0 = nfsd_suppattrs0(minorversion);
2137 u32 word1 = nfsd_suppattrs1(minorversion);
2138 u32 word2 = nfsd_suppattrs2(minorversion);
2139
42ca0993
BF		 2140 if (!aclsupport)
2141 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2142 if (!contextsupport)
2143 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2144 if (!word2) {
ddd1ea56
BF		 2145 p = xdr_reserve_space(xdr, 12);
2146 if (!p)
2b44f1ba 2147 goto out_resource;
c373b0a4
BF		 2148 *p++ = cpu_to_be32(2);
2149 *p++ = cpu_to_be32(word0);
2150 *p++ = cpu_to_be32(word1);
7e705706 2151 } else {
ddd1ea56
BF		 2152 p = xdr_reserve_space(xdr, 16);
2153 if (!p)
2b44f1ba 2154 goto out_resource;
c373b0a4
BF		 2155 *p++ = cpu_to_be32(3);
2156 *p++ = cpu_to_be32(word0);
2157 *p++ = cpu_to_be32(word1);
2158 *p++ = cpu_to_be32(word2);
7e705706 2159 }
1da177e4
LT		 2160 }
2161 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2162 p = xdr_reserve_space(xdr, 4);
2163 if (!p)
1da177e4 2164 goto out_resource;
3d2544b1 2165 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2166 if (dummy == NF4BAD) {
2167 status = nfserr_serverfault;
2168 goto out;
2169 }
c373b0a4 2170 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2171 }
2172 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2173 p = xdr_reserve_space(xdr, 4);
2174 if (!p)
1da177e4 2175 goto out_resource;
49640001 2176 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2177 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2178 else
c373b0a4
BF		 2179 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2180 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2181 }
2182 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2183 p = xdr_reserve_space(xdr, 8);
2184 if (!p)
1da177e4 2185 goto out_resource;
d05d5744 2186 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2187 }
2188 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2189 p = xdr_reserve_space(xdr, 8);
2190 if (!p)
1da177e4 2191 goto out_resource;
b64c7f3b 2192 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2193 }
2194 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2195 p = xdr_reserve_space(xdr, 4);
2196 if (!p)
1da177e4 2197 goto out_resource;
c373b0a4 2198 *p++ = cpu_to_be32(1);
1da177e4
LT		 2199 }
2200 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2201 p = xdr_reserve_space(xdr, 4);
2202 if (!p)
1da177e4 2203 goto out_resource;
c373b0a4 2204 *p++ = cpu_to_be32(1);
1da177e4
LT		 2205 }
2206 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2207 p = xdr_reserve_space(xdr, 4);
2208 if (!p)
1da177e4 2209 goto out_resource;
c373b0a4 2210 *p++ = cpu_to_be32(0);
1da177e4
LT		 2211 }
2212 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2213 p = xdr_reserve_space(xdr, 16);
2214 if (!p)
1da177e4 2215 goto out_resource;
42ca0993 2216 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2217 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2218 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2219 } else switch(fsid_source(fhp)) {
2220 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2221 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2222 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2223 break;
2224 case FSIDSOURCE_DEV:
c373b0a4
BF		 2225 *p++ = cpu_to_be32(0);
2226 *p++ = cpu_to_be32(MAJOR(stat.dev));
2227 *p++ = cpu_to_be32(0);
2228 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2229 break;
2230 case FSIDSOURCE_UUID:
94eb3689
KM		 2231 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2232 EX_UUID_LEN);
af6a4e28 2233 break;
1da177e4
LT		 2234 }
2235 }
2236 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2237 p = xdr_reserve_space(xdr, 4);
2238 if (!p)
1da177e4 2239 goto out_resource;
c373b0a4 2240 *p++ = cpu_to_be32(0);
1da177e4
LT		 2241 }
2242 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2243 p = xdr_reserve_space(xdr, 4);
2244 if (!p)
1da177e4 2245 goto out_resource;
c373b0a4 2246 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2247 }
2248 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2249 p = xdr_reserve_space(xdr, 4);
2250 if (!p)
1da177e4 2251 goto out_resource;
c373b0a4 2252 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2253 }
2254 if (bmval0 & FATTR4_WORD0_ACL) {
2255 struct nfs4_ace *ace;
1da177e4
LT		 2256
2257 if (acl == NULL) {
ddd1ea56
BF		 2258 p = xdr_reserve_space(xdr, 4);
2259 if (!p)
1da177e4
LT		 2260 goto out_resource;
2261
c373b0a4 2262 *p++ = cpu_to_be32(0);
1da177e4
LT		 2263 goto out_acl;
2264 }
ddd1ea56
BF		 2265 p = xdr_reserve_space(xdr, 4);
2266 if (!p)
1da177e4 2267 goto out_resource;
c373b0a4 2268 *p++ = cpu_to_be32(acl->naces);
1da177e4 2269
28e05dd8 2270 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2271 p = xdr_reserve_space(xdr, 4*3);
2272 if (!p)
1da177e4 2273 goto out_resource;
c373b0a4
BF		 2274 *p++ = cpu_to_be32(ace->type);
2275 *p++ = cpu_to_be32(ace->flag);
2276 *p++ = cpu_to_be32(ace->access_mask &
2277 NFS4_ACE_MASK_ALL);
ddd1ea56 2278 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2279 if (status)
2280 goto out;
2281 }
2282 }
2283out_acl:
2284 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2285 p = xdr_reserve_space(xdr, 4);
2286 if (!p)
1da177e4 2287 goto out_resource;
c373b0a4 2288 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2289 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2290 }
2291 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2292 p = xdr_reserve_space(xdr, 4);
2293 if (!p)
1da177e4 2294 goto out_resource;
c373b0a4 2295 *p++ = cpu_to_be32(1);
1da177e4
LT		 2296 }
2297 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2298 p = xdr_reserve_space(xdr, 4);
2299 if (!p)
1da177e4 2300 goto out_resource;
c373b0a4 2301 *p++ = cpu_to_be32(0);
1da177e4
LT		 2302 }
2303 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2304 p = xdr_reserve_space(xdr, 4);
2305 if (!p)
1da177e4 2306 goto out_resource;
c373b0a4 2307 *p++ = cpu_to_be32(1);
1da177e4
LT		 2308 }
2309 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2310 p = xdr_reserve_space(xdr, 4);
2311 if (!p)
1da177e4 2312 goto out_resource;
c373b0a4 2313 *p++ = cpu_to_be32(1);
1da177e4
LT		 2314 }
2315 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2316 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2317 if (!p)
1da177e4 2318 goto out_resource;
0c0c267b
BF		 2319 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2320 fhp->fh_handle.fh_size);
1da177e4
LT		 2321 }
2322 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2323 p = xdr_reserve_space(xdr, 8);
2324 if (!p)
1da177e4 2325 goto out_resource;
b64c7f3b 2326 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2327 }
2328 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2329 p = xdr_reserve_space(xdr, 8);
2330 if (!p)
1da177e4 2331 goto out_resource;
b64c7f3b 2332 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2333 }
2334 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2335 p = xdr_reserve_space(xdr, 8);
2336 if (!p)
1da177e4 2337 goto out_resource;
b64c7f3b 2338 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2339 }
2340 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2341 p = xdr_reserve_space(xdr, 8);
2342 if (!p)
1da177e4 2343 goto out_resource;
b64c7f3b 2344 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2345 }
81c3f413 2346 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2347 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2348 if (status)
2349 goto out;
2350 }
1da177e4 2351 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2352 p = xdr_reserve_space(xdr, 4);
2353 if (!p)
1da177e4 2354 goto out_resource;
c373b0a4 2355 *p++ = cpu_to_be32(1);
1da177e4
LT		 2356 }
2357 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2358 p = xdr_reserve_space(xdr, 8);
2359 if (!p)
1da177e4 2360 goto out_resource;
b64c7f3b 2361 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2362 }
2363 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2364 p = xdr_reserve_space(xdr, 4);
2365 if (!p)
1da177e4 2366 goto out_resource;
c373b0a4 2367 *p++ = cpu_to_be32(255);
1da177e4
LT		 2368 }
2369 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2370 p = xdr_reserve_space(xdr, 4);
2371 if (!p)
1da177e4 2372 goto out_resource;
c373b0a4 2373 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2374 }
2375 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2376 p = xdr_reserve_space(xdr, 8);
2377 if (!p)
1da177e4 2378 goto out_resource;
b64c7f3b 2379 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2380 }
2381 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2382 p = xdr_reserve_space(xdr, 8);
2383 if (!p)
1da177e4 2384 goto out_resource;
b64c7f3b 2385 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2386 }
2387 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2388 p = xdr_reserve_space(xdr, 4);
2389 if (!p)
1da177e4 2390 goto out_resource;
c373b0a4 2391 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2392 }
2393 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2394 p = xdr_reserve_space(xdr, 4);
2395 if (!p)
1da177e4 2396 goto out_resource;
c373b0a4 2397 *p++ = cpu_to_be32(1);
1da177e4
LT		 2398 }
2399 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2400 p = xdr_reserve_space(xdr, 4);
2401 if (!p)
1da177e4 2402 goto out_resource;
c373b0a4 2403 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2404 }
2405 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2406 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2407 if (status)
2408 goto out;
2409 }
2410 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2411 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2412 if (status)
2413 goto out;
2414 }
2415 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2416 p = xdr_reserve_space(xdr, 8);
2417 if (!p)
1da177e4 2418 goto out_resource;
c373b0a4
BF		 2419 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2420 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2421 }
2422 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2423 p = xdr_reserve_space(xdr, 8);
2424 if (!p)
1da177e4
LT		 2425 goto out_resource;
2426 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2427 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2428 }
2429 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2430 p = xdr_reserve_space(xdr, 8);
2431 if (!p)
1da177e4
LT		 2432 goto out_resource;
2433 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2434 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2435 }
2436 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2437 p = xdr_reserve_space(xdr, 8);
2438 if (!p)
1da177e4
LT		 2439 goto out_resource;
2440 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2441 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2442 }
2443 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2444 p = xdr_reserve_space(xdr, 8);
2445 if (!p)
1da177e4
LT		 2446 goto out_resource;
2447 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2448 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2449 }
2450 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2451 p = xdr_reserve_space(xdr, 12);
2452 if (!p)
1da177e4 2453 goto out_resource;
b64c7f3b 2454 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2455 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2456 }
2457 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2458 p = xdr_reserve_space(xdr, 12);
2459 if (!p)
1da177e4 2460 goto out_resource;
c373b0a4
BF		 2461 *p++ = cpu_to_be32(0);
2462 *p++ = cpu_to_be32(1);
2463 *p++ = cpu_to_be32(0);
1da177e4
LT		 2464 }
2465 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2466 p = xdr_reserve_space(xdr, 12);
2467 if (!p)
1da177e4 2468 goto out_resource;
b64c7f3b 2469 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2470 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2471 }
2472 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2473 p = xdr_reserve_space(xdr, 12);
2474 if (!p)
1da177e4 2475 goto out_resource;
b64c7f3b 2476 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2477 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2478 }
2479 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2480 p = xdr_reserve_space(xdr, 8);
2481 if (!p)
1da177e4 2482 goto out_resource;
406a7ea9
FF		 2483 /*
2484 * Get parent's attributes if not ignoring crossmount
2485 * and this is the root of a cross-mounted filesystem.
2486 */
2487 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2488 dentry == exp->ex_path.mnt->mnt_root)
2489 get_parent_attributes(exp, &stat);
b64c7f3b 2490 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2491 }
18032ca0 2492 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2493 status = nfsd4_encode_security_label(xdr, rqstp, context,
2494 contextlen);
18032ca0
DQ		 2495 if (status)
2496 goto out;
2497 }
8c18f205 2498 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2499 p = xdr_reserve_space(xdr, 16);
2500 if (!p)
de3997a7 2501 goto out_resource;
c373b0a4
BF		 2502 *p++ = cpu_to_be32(3);
2503 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2504 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2505 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2506 }
7e705706 2507
082d4bd7
BF		 2508 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2509 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2510 status = nfs_ok;
2511
2512out:
ba4e55bb 2513#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2514 if (context)
2515 security_release_secctx(context, contextlen);
ba4e55bb 2516#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2517 kfree(acl);
18df11d0 2518 if (tempfh) {
d50e6136 2519 fh_put(tempfh);
18df11d0
YZ		 2520 kfree(tempfh);
2521 }
1fcea5b2
BF		 2522 if (status)
2523 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2524 return status;
2525out_nfserr:
b8dd7b9a 2526 status = nfserrno(err);
1da177e4
LT		 2527 goto out;
2528out_resource:
1da177e4
LT		 2529 status = nfserr_resource;
2530 goto out;
1da177e4
LT		 2531}
2532
2825a7f9
BF		 2533static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2534 struct xdr_buf *buf, __be32 *p, int bytes)
2535{
2536 xdr->scratch.iov_len = 0;
2537 memset(buf, 0, sizeof(struct xdr_buf));
2538 buf->head[0].iov_base = p;
2539 buf->head[0].iov_len = 0;
2540 buf->len = 0;
2541 xdr->buf = buf;
2542 xdr->iov = buf->head;
2543 xdr->p = p;
2544 xdr->end = (void *)p + bytes;
2545 buf->buflen = bytes;
2546}
2547
d5184658
BF		 2548__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2549 struct svc_fh *fhp, struct svc_export *exp,
2550 struct dentry *dentry, u32 *bmval,
2551 struct svc_rqst *rqstp, int ignore_crossmnt)
2552{
2825a7f9 2553 struct xdr_buf dummy;
d5184658
BF		 2554 struct xdr_stream xdr;
2555 __be32 ret;
2556
2825a7f9 2557 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2558 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2559 ignore_crossmnt);
2560 *p = xdr.p;
2561 return ret;
2562}
2563
c0ce6ec8
BF		 2564static inline int attributes_need_mount(u32 *bmval)
2565{
2566 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2567 return 1;
2568 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2569 return 1;
2570 return 0;
2571}
2572
b37ad28b 2573static __be32
561f0ed4
BF		 2574nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2575 const char *name, int namlen)
1da177e4
LT		 2576{
2577 struct svc_export *exp = cd->rd_fhp->fh_export;
2578 struct dentry *dentry;
b37ad28b 2579 __be32 nfserr;
406a7ea9 2580 int ignore_crossmnt = 0;
1da177e4
LT		 2581
2582 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2583 if (IS_ERR(dentry))
2584 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2585 if (!dentry->d_inode) {
2586 /*
2587 * nfsd_buffered_readdir drops the i_mutex between
2588 * readdir and calling this callback, leaving a window
2589 * where this directory entry could have gone away.
2590 */
2591 dput(dentry);
2592 return nfserr_noent;
2593 }
1da177e4
LT		 2594
2595 exp_get(exp);
406a7ea9
FF		 2596 /*
2597 * In the case of a mountpoint, the client may be asking for
2598 * attributes that are only properties of the underlying filesystem
2599 * as opposed to the cross-mounted file system. In such a case,
2600 * we will not follow the cross mount and will fill the attribtutes
2601 * directly from the mountpoint dentry.
2602 */
3227fa41 2603 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2604 int err;
2605
3227fa41
BF		 2606 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2607 && !attributes_need_mount(cd->rd_bmval)) {
2608 ignore_crossmnt = 1;
2609 goto out_encode;
2610 }
dcb488a3
AA		 2611 /*
2612 * Why the heck aren't we just using nfsd_lookup??
2613 * Different "."/".." handling? Something else?
2614 * At least, add a comment here to explain....
2615 */
021d3a72
BF		 2616 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2617 if (err) {
2618 nfserr = nfserrno(err);
1da177e4
LT		 2619 goto out_put;
2620 }
dcb488a3
AA		 2621 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2622 if (nfserr)
2623 goto out_put;
1da177e4
LT		 2624
2625 }
3227fa41 2626out_encode:
561f0ed4 2627 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2628 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2629out_put:
2630 dput(dentry);
2631 exp_put(exp);
2632 return nfserr;
2633}
2634
2ebbc012 2635static __be32 *
561f0ed4 2636nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2637{
561f0ed4
BF		 2638 __be32 *p;
2639
2640 p = xdr_reserve_space(xdr, 6);
2641 if (!p)
1da177e4
LT		 2642 return NULL;
2643 *p++ = htonl(2);
2644 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2645 *p++ = htonl(0); /* bmval1 */
2646
87915c64 2647 *p++ = htonl(4); /* attribute length */
1da177e4 2648 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2649 return p;
2650}
2651
2652static int
a0ad13ef
N		 2653nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2654 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2655{
a0ad13ef 2656 struct readdir_cd *ccd = ccdv;
1da177e4 2657 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2658 struct xdr_stream *xdr = cd->xdr;
2659 int start_offset = xdr->buf->len;
2660 int cookie_offset;
2661 int entry_bytes;
b37ad28b 2662 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2663 __be64 wire_offset;
2664 __be32 *p;
1da177e4
LT		 2665
2666 /* In nfsv4, "." and ".." never make it onto the wire.. */
2667 if (name && isdotent(name, namlen)) {
2668 cd->common.err = nfs_ok;
2669 return 0;
2670 }
2671
561f0ed4
BF		 2672 if (cd->cookie_offset) {
2673 wire_offset = cpu_to_be64(offset);
2674 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2675 &wire_offset, 8);
2676 }
1da177e4 2677
561f0ed4
BF		 2678 p = xdr_reserve_space(xdr, 4);
2679 if (!p)
1da177e4 2680 goto fail;
1da177e4 2681 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2682 cookie_offset = xdr->buf->len;
2683 p = xdr_reserve_space(xdr, 3*4 + namlen);
2684 if (!p)
2685 goto fail;
1da177e4
LT		 2686 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2687 p = xdr_encode_array(p, name, namlen); /* name length & name */
2688
561f0ed4 2689 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2690 switch (nfserr) {
2691 case nfs_ok:
1da177e4
LT		 2692 break;
2693 case nfserr_resource:
2694 nfserr = nfserr_toosmall;
2695 goto fail;
b2c0cea6 2696 case nfserr_noent:
f41c5ad2 2697 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2698 goto skip_entry;
1da177e4
LT		 2699 default:
2700 /*
2701 * If the client requested the RDATTR_ERROR attribute,
2702 * we stuff the error code into this attribute
2703 * and continue. If this attribute was not requested,
2704 * then in accordance with the spec, we fail the
2705 * entire READDIR operation(!)
2706 */
2707 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2708 goto fail;
561f0ed4 2709 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2710 if (p == NULL) {
2711 nfserr = nfserr_toosmall;
1da177e4 2712 goto fail;
34081efc 2713 }
1da177e4 2714 }
561f0ed4
BF		 2715 nfserr = nfserr_toosmall;
2716 entry_bytes = xdr->buf->len - start_offset;
2717 if (entry_bytes > cd->rd_maxcount)
2718 goto fail;
2719 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2720 if (!cd->rd_dircount)
2721 goto fail;
2722 cd->rd_dircount--;
561f0ed4 2723 cd->cookie_offset = cookie_offset;
b2c0cea6 2724skip_entry:
1da177e4
LT		 2725 cd->common.err = nfs_ok;
2726 return 0;
2727fail:
561f0ed4 2728 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2729 cd->common.err = nfserr;
2730 return -EINVAL;
2731}
2732
d0a381dd
BF		 2733static __be32
2734nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2735{
bc749ca4 2736 __be32 *p;
e2f282b9 2737
d0a381dd
BF		 2738 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2739 if (!p)
2740 return nfserr_resource;
c373b0a4 2741 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2742 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2743 sizeof(stateid_opaque_t));
d0a381dd 2744 return 0;
e2f282b9
BH		 2745}
2746
695e12f8 2747static __be32
b37ad28b 2748nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2749{
d0a381dd 2750 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2751 __be32 *p;
1da177e4
LT		 2752
2753 if (!nfserr) {
d0a381dd
BF		 2754 p = xdr_reserve_space(xdr, 8);
2755 if (!p)
2756 return nfserr_resource;
c373b0a4
BF		 2757 *p++ = cpu_to_be32(access->ac_supported);
2758 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2759 }
695e12f8 2760 return nfserr;
1da177e4
LT		 2761}
2762
1d1bc8f2
BF		 2763static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2764{
d0a381dd 2765 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2766 __be32 *p;
2767
2768 if (!nfserr) {
d0a381dd
BF		 2769 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2770 if (!p)
2771 return nfserr_resource;
0c0c267b
BF		 2772 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2773 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2774 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2775 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2776 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2777 }
2778 return nfserr;
2779}
2780
695e12f8 2781static __be32
b37ad28b 2782nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2783{
d0a381dd
BF		 2784 struct xdr_stream *xdr = &resp->xdr;
2785
e2f282b9 2786 if (!nfserr)
d0a381dd 2787 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2788
695e12f8 2789 return nfserr;
1da177e4
LT		 2790}
2791
2792
695e12f8 2793static __be32
b37ad28b 2794nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2795{
d0a381dd 2796 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2797 __be32 *p;
1da177e4
LT		 2798
2799 if (!nfserr) {
d0a381dd
BF		 2800 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2801 if (!p)
2802 return nfserr_resource;
0c0c267b
BF		 2803 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2804 NFS4_VERIFIER_SIZE);
1da177e4 2805 }
695e12f8 2806 return nfserr;
1da177e4
LT		 2807}
2808
695e12f8 2809static __be32
b37ad28b 2810nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2811{
d0a381dd 2812 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2813 __be32 *p;
1da177e4
LT		 2814
2815 if (!nfserr) {
d0a381dd
BF		 2816 p = xdr_reserve_space(xdr, 32);
2817 if (!p)
2818 return nfserr_resource;
d05d5744 2819 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2820 *p++ = cpu_to_be32(2);
2821 *p++ = cpu_to_be32(create->cr_bmval[0]);
2822 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2823 }
695e12f8 2824 return nfserr;
1da177e4
LT		 2825}
2826
b37ad28b
AV		 2827static __be32
2828nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2829{
2830 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2831 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2832
2833 if (nfserr)
2834 return nfserr;
2835
d5184658
BF		 2836 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2837 getattr->ga_bmval,
406a7ea9 2838 resp->rqstp, 0);
1da177e4
LT		 2839 return nfserr;
2840}
2841
695e12f8
BH		 2842static __be32
2843nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2844{
d0a381dd 2845 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2846 struct svc_fh *fhp = *fhpp;
1da177e4 2847 unsigned int len;
bc749ca4 2848 __be32 *p;
1da177e4
LT		 2849
2850 if (!nfserr) {
2851 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2852 p = xdr_reserve_space(xdr, len + 4);
2853 if (!p)
2854 return nfserr_resource;
0c0c267b 2855 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2856 }
695e12f8 2857 return nfserr;
1da177e4
LT		 2858}
2859
2860/*
2861* Including all fields other than the name, a LOCK4denied structure requires
2862* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2863*/
d0a381dd
BF		 2864static __be32
2865nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2866{
7c13f344 2867 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2868 __be32 *p;
1da177e4 2869
8c7424cf 2870again:
d0a381dd 2871 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2872 if (!p) {
2873 /*
2874 * Don't fail to return the result just because we can't
2875 * return the conflicting open:
2876 */
2877 if (conf->len) {
2878 conf->len = 0;
2879 conf->data = NULL;
2880 goto again;
2881 }
d0a381dd 2882 return nfserr_resource;
8c7424cf 2883 }
b64c7f3b
BF		 2884 p = xdr_encode_hyper(p, ld->ld_start);
2885 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2886 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2887 if (conf->len) {
0c0c267b
BF		 2888 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2889 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2890 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2891 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2892 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2893 }
d0a381dd 2894 return nfserr_denied;
1da177e4
LT		 2895}
2896
695e12f8 2897static __be32
b37ad28b 2898nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2899{
d0a381dd
BF		 2900 struct xdr_stream *xdr = &resp->xdr;
2901
e2f282b9 2902 if (!nfserr)
d0a381dd 2903 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2904 else if (nfserr == nfserr_denied)
d0a381dd 2905 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2906 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2907 return nfserr;
1da177e4
LT		 2908}
2909
695e12f8 2910static __be32
b37ad28b 2911nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2912{
d0a381dd
BF		 2913 struct xdr_stream *xdr = &resp->xdr;
2914
1da177e4 2915 if (nfserr == nfserr_denied)
d0a381dd 2916 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2917 return nfserr;
1da177e4
LT		 2918}
2919
695e12f8 2920static __be32
b37ad28b 2921nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2922{
d0a381dd
BF		 2923 struct xdr_stream *xdr = &resp->xdr;
2924
e2f282b9 2925 if (!nfserr)
d0a381dd 2926 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2927
695e12f8 2928 return nfserr;
1da177e4
LT		 2929}
2930
2931
695e12f8 2932static __be32
b37ad28b 2933nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2934{
d0a381dd 2935 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2936 __be32 *p;
1da177e4
LT		 2937
2938 if (!nfserr) {
d0a381dd
BF		 2939 p = xdr_reserve_space(xdr, 20);
2940 if (!p)
2941 return nfserr_resource;
d05d5744 2942 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2943 }
695e12f8 2944 return nfserr;
1da177e4
LT		 2945}
2946
2947
695e12f8 2948static __be32
b37ad28b 2949nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2950{
d0a381dd 2951 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2952 __be32 *p;
1da177e4
LT		 2953
2954 if (nfserr)
2955 goto out;
2956
d0a381dd
BF		 2957 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2958 if (nfserr)
2959 goto out;
2960 p = xdr_reserve_space(xdr, 40);
2961 if (!p)
2962 return nfserr_resource;
d05d5744 2963 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2964 *p++ = cpu_to_be32(open->op_rflags);
2965 *p++ = cpu_to_be32(2);
2966 *p++ = cpu_to_be32(open->op_bmval[0]);
2967 *p++ = cpu_to_be32(open->op_bmval[1]);
2968 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2969
2970 switch (open->op_delegate_type) {
2971 case NFS4_OPEN_DELEGATE_NONE:
2972 break;
2973 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2974 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2975 if (nfserr)
2976 return nfserr;
2977 p = xdr_reserve_space(xdr, 20);
2978 if (!p)
2979 return nfserr_resource;
c373b0a4 2980 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2981
2982 /*
2983 * TODO: ACE's in delegations
2984 */
c373b0a4
BF		 2985 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2986 *p++ = cpu_to_be32(0);
2987 *p++ = cpu_to_be32(0);
2988 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2989 break;
2990 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2991 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2992 if (nfserr)
2993 return nfserr;
2994 p = xdr_reserve_space(xdr, 32);
2995 if (!p)
2996 return nfserr_resource;
c373b0a4 2997 *p++ = cpu_to_be32(0);
1da177e4
LT		 2998
2999 /*
3000 * TODO: space_limit's in delegations
3001 */
c373b0a4
BF		 3002 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3003 *p++ = cpu_to_be32(~(u32)0);
3004 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3005
3006 /*
3007 * TODO: ACE's in delegations
3008 */
c373b0a4
BF		 3009 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3010 *p++ = cpu_to_be32(0);
3011 *p++ = cpu_to_be32(0);
3012 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3013 break;
d24433cd
BH		 3014 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3015 switch (open->op_why_no_deleg) {
3016 case WND4_CONTENTION:
3017 case WND4_RESOURCE:
d0a381dd
BF		 3018 p = xdr_reserve_space(xdr, 8);
3019 if (!p)
3020 return nfserr_resource;
c373b0a4
BF		 3021 *p++ = cpu_to_be32(open->op_why_no_deleg);
3022 /* deleg signaling not supported yet: */
3023 *p++ = cpu_to_be32(0);
d24433cd
BH		 3024 break;
3025 default:
d0a381dd
BF		 3026 p = xdr_reserve_space(xdr, 4);
3027 if (!p)
3028 return nfserr_resource;
c373b0a4 3029 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3030 }
d24433cd 3031 break;
1da177e4
LT		 3032 default:
3033 BUG();
3034 }
3035 /* XXX save filehandle here */
3036out:
695e12f8 3037 return nfserr;
1da177e4
LT		 3038}
3039
695e12f8 3040static __be32
b37ad28b 3041nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3042{
d0a381dd
BF		 3043 struct xdr_stream *xdr = &resp->xdr;
3044
e2f282b9 3045 if (!nfserr)
d0a381dd 3046 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3047
695e12f8 3048 return nfserr;
1da177e4
LT		 3049}
3050
695e12f8 3051static __be32
b37ad28b 3052nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3053{
d0a381dd
BF		 3054 struct xdr_stream *xdr = &resp->xdr;
3055
e2f282b9 3056 if (!nfserr)
d0a381dd 3057 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3058
695e12f8 3059 return nfserr;
1da177e4
LT		 3060}
3061
dc97618d
BF		 3062static __be32 nfsd4_encode_splice_read(
3063 struct nfsd4_compoundres *resp,
3064 struct nfsd4_read *read,
3065 struct file *file, unsigned long maxcount)
1da177e4 3066{
ddd1ea56 3067 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3068 struct xdr_buf *buf = xdr->buf;
dc97618d 3069 u32 eof;
30596768 3070 int space_left;
dc97618d 3071 __be32 nfserr;
fec25fa4 3072 __be32 *p = xdr->p - 2;
1da177e4 3073
dc97618d
BF		 3074 /*
3075 * Don't inline pages unless we know there's room for eof,
3076 * count, and possible padding:
3077 */
3078 if (xdr->end - xdr->p < 3)
d0a381dd 3079 return nfserr_resource;
dc97618d
BF		 3080
3081 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3082 read->rd_offset, &maxcount);
3083 if (nfserr) {
3084 /*
3085 * nfsd_splice_actor may have already messed with the
3086 * page length; reset it so as not to confuse
3087 * xdr_truncate_encode:
3088 */
34a78b48 3089 buf->page_len = 0;
dc97618d 3090 return nfserr;
b0e35fda 3091 }
1da177e4 3092
dc97618d
BF		 3093 eof = (read->rd_offset + maxcount >=
3094 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3095
fec25fa4
BF		 3096 *(p++) = htonl(eof);
3097 *(p++) = htonl(maxcount);
dc97618d 3098
34a78b48
BF		 3099 buf->page_len = maxcount;
3100 buf->len += maxcount;
dc97618d 3101 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3102
3103 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3104 buf->tail[0].iov_base = xdr->p;
3105 buf->tail[0].iov_len = 0;
fec25fa4 3106 xdr->iov = buf->tail;
dc97618d 3107 if (maxcount&3) {
fec25fa4
BF		 3108 int pad = 4 - (maxcount&3);
3109
3110 *(xdr->p++) = 0;
3111
34a78b48 3112 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3113 buf->tail[0].iov_len = pad;
3114 buf->len += pad;
b0e35fda 3115 }
2825a7f9 3116
dc97618d 3117 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3118 buf->buflen - buf->len);
3119 buf->buflen = buf->len + space_left;
dc97618d
BF		 3120 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3121
3122 return 0;
3123}
3124
3125static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3126 struct nfsd4_read *read,
3127 struct file *file, unsigned long maxcount)
3128{
3129 struct xdr_stream *xdr = &resp->xdr;
3130 u32 eof;
3131 int v;
dc97618d 3132 int starting_len = xdr->buf->len - 8;
dc97618d 3133 long len;
b0420980 3134 int thislen;
dc97618d
BF		 3135 __be32 nfserr;
3136 __be32 tmp;
3137 __be32 *p;
b0420980
BF		 3138 u32 zzz = 0;
3139 int pad;
1da177e4
LT		 3140
3141 len = maxcount;
3142 v = 0;
6ff9897d 3143
3c7aa15d 3144 thislen = min(len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3145 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3146 WARN_ON_ONCE(!p);
3147 resp->rqstp->rq_vec[v].iov_base = p;
3148 resp->rqstp->rq_vec[v].iov_len = thislen;
3149 v++;
3150 len -= thislen;
3151
3152 while (len) {
6ff9897d 3153 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3154 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3155 WARN_ON_ONCE(!p);
3156 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3157 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3158 v++;
6ff9897d 3159 len -= thislen;
1da177e4
LT		 3160 }
3161 read->rd_vlen = v;
3162
dc97618d
BF		 3163 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3164 read->rd_vlen, &maxcount);
3165 if (nfserr)
1da177e4 3166 return nfserr;
b0420980 3167 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3168
44524359
N		 3169 eof = (read->rd_offset + maxcount >=
3170 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3171
dc97618d
BF		 3172 tmp = htonl(eof);
3173 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3174 tmp = htonl(maxcount);
3175 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3176
b0420980
BF		 3177 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3178 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3179 &zzz, pad);
1da177e4 3180 return 0;
dc97618d
BF		 3181
3182}
3183
3184static __be32
3185nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3186 struct nfsd4_read *read)
3187{
3188 unsigned long maxcount;
3189 struct xdr_stream *xdr = &resp->xdr;
3190 struct file *file = read->rd_filp;
3191 int starting_len = xdr->buf->len;
3192 struct raparms *ra;
3193 __be32 *p;
3194 __be32 err;
3195
3196 if (nfserr)
3197 return nfserr;
3198
3199 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3200 if (!p) {
3201 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3202 return nfserr_resource;
3203 }
b0420980
BF		 3204 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3205 WARN_ON_ONCE(1);
dc97618d
BF		 3206 return nfserr_resource;
3207 }
dc97618d
BF		 3208 xdr_commit_encode(xdr);
3209
3210 maxcount = svc_max_payload(resp->rqstp);
3c7aa15d
KM		 3211 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3212 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d
BF		 3213
3214 if (!read->rd_filp) {
3215 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3216 &file, &ra);
3217 if (err)
3218 goto err_truncate;
3219 }
3220
3221 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3222 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3223 else
3224 err = nfsd4_encode_readv(resp, read, file, maxcount);
3225
3226 if (!read->rd_filp)
3227 nfsd_put_tmp_read_open(file, ra);
3228
3229err_truncate:
3230 if (err)
3231 xdr_truncate_encode(xdr, starting_len);
3232 return err;
1da177e4
LT		 3233}
3234
b37ad28b
AV		 3235static __be32
3236nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3237{
3238 int maxcount;
476a7b1f
BF		 3239 __be32 wire_count;
3240 int zero = 0;
ddd1ea56 3241 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3242 int length_offset = xdr->buf->len;
bc749ca4 3243 __be32 *p;
1da177e4
LT		 3244
3245 if (nfserr)
3246 return nfserr;
2825a7f9
BF		 3247
3248 p = xdr_reserve_space(xdr, 4);
3249 if (!p)
3250 return nfserr_resource;
1da177e4 3251 maxcount = PAGE_SIZE;
d0a381dd 3252
476a7b1f
BF		 3253 p = xdr_reserve_space(xdr, maxcount);
3254 if (!p)
4e21ac4b 3255 return nfserr_resource;
1da177e4
LT		 3256 /*
3257 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3258 * if they would overflow the buffer. Is this kosher in NFSv4? If
3259 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3260 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3261 */
476a7b1f
BF		 3262 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3263 (char *)p, &maxcount);
1da177e4 3264 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3265 nfserr = nfserr_inval;
3266 if (nfserr) {
1fcea5b2 3267 xdr_truncate_encode(xdr, length_offset);
1da177e4 3268 return nfserr;
d3f627c8 3269 }
1da177e4 3270
476a7b1f
BF		 3271 wire_count = htonl(maxcount);
3272 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3273 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3274 if (maxcount & 3)
3275 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3276 &zero, 4 - (maxcount&3));
1da177e4
LT		 3277 return 0;
3278}
3279
b37ad28b
AV		 3280static __be32
3281nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3282{
3283 int maxcount;
561f0ed4 3284 int bytes_left;
1da177e4 3285 loff_t offset;
561f0ed4 3286 __be64 wire_offset;
ddd1ea56 3287 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3288 int starting_len = xdr->buf->len;
bc749ca4 3289 __be32 *p;
1da177e4
LT		 3290
3291 if (nfserr)
3292 return nfserr;
1da177e4 3293
d0a381dd
BF		 3294 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3295 if (!p)
3296 return nfserr_resource;
1da177e4
LT		 3297
3298 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3299 *p++ = cpu_to_be32(0);
3300 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3301 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3302 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3303
3304 /*
561f0ed4
BF		 3305 * Number of bytes left for directory entries allowing for the
3306 * final 8 bytes of the readdir and a following failed op:
3307 */
3308 bytes_left = xdr->buf->buflen - xdr->buf->len
3309 - COMPOUND_ERR_SLACK_SPACE - 8;
3310 if (bytes_left < 0) {
3311 nfserr = nfserr_resource;
3312 goto err_no_verf;
3313 }
3314 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3315 /*
3316 * Note the rfc defines rd_maxcount as the size of the
3317 * READDIR4resok structure, which includes the verifier above
3318 * and the 8 bytes encoded at the end of this function:
1da177e4 3319 */
561f0ed4
BF		 3320 if (maxcount < 16) {
3321 nfserr = nfserr_toosmall;
1da177e4
LT		 3322 goto err_no_verf;
3323 }
561f0ed4 3324 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3325
561f0ed4
BF		 3326 readdir->xdr = xdr;
3327 readdir->rd_maxcount = maxcount;
1da177e4 3328 readdir->common.err = 0;
561f0ed4 3329 readdir->cookie_offset = 0;
1da177e4
LT		 3330
3331 offset = readdir->rd_cookie;
3332 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3333 &offset,
3334 &readdir->common, nfsd4_encode_dirent);
3335 if (nfserr == nfs_ok &&
3336 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3337 xdr->buf->len == starting_len + 8) {
3338 /* nothing encoded; which limit did we hit?: */
3339 if (maxcount - 16 < bytes_left)
3340 /* It was the fault of rd_maxcount: */
3341 nfserr = nfserr_toosmall;
3342 else
3343 /* We ran out of buffer space: */
3344 nfserr = nfserr_resource;
3345 }
1da177e4
LT		 3346 if (nfserr)
3347 goto err_no_verf;
3348
561f0ed4
BF		 3349 if (readdir->cookie_offset) {
3350 wire_offset = cpu_to_be64(offset);
3351 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3352 &wire_offset, 8);
3353 }
1da177e4 3354
561f0ed4
BF		 3355 p = xdr_reserve_space(xdr, 8);
3356 if (!p) {
3357 WARN_ON_ONCE(1);
3358 goto err_no_verf;
3359 }
1da177e4
LT		 3360 *p++ = 0; /* no more entries */
3361 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3362
3363 return 0;
3364err_no_verf:
1fcea5b2 3365 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3366 return nfserr;
3367}
3368
695e12f8 3369static __be32
b37ad28b 3370nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3371{
d0a381dd 3372 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3373 __be32 *p;
1da177e4
LT		 3374
3375 if (!nfserr) {
d0a381dd
BF		 3376 p = xdr_reserve_space(xdr, 20);
3377 if (!p)
3378 return nfserr_resource;
d05d5744 3379 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3380 }
695e12f8 3381 return nfserr;
1da177e4
LT		 3382}
3383
695e12f8 3384static __be32
b37ad28b 3385nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3386{
d0a381dd 3387 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3388 __be32 *p;
1da177e4
LT		 3389
3390 if (!nfserr) {
d0a381dd
BF		 3391 p = xdr_reserve_space(xdr, 40);
3392 if (!p)
3393 return nfserr_resource;
d05d5744
BF		 3394 p = encode_cinfo(p, &rename->rn_sinfo);
3395 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3396 }
695e12f8 3397 return nfserr;
1da177e4
LT		 3398}
3399
695e12f8 3400static __be32
d0a381dd 3401nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3402 __be32 nfserr, struct svc_export *exp)
dcb488a3 3403{
676e4ebd 3404 u32 i, nflavs, supported;
4796f457
BF		 3405 struct exp_flavor_info *flavs;
3406 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3407 __be32 *p, *flavorsp;
3408 static bool report = true;
dcb488a3
AA		 3409
3410 if (nfserr)
3411 goto out;
d0a381dd 3412 nfserr = nfserr_resource;
4796f457
BF		 3413 if (exp->ex_nflavors) {
3414 flavs = exp->ex_flavors;
3415 nflavs = exp->ex_nflavors;
3416 } else { /* Handling of some defaults in absence of real secinfo: */
3417 flavs = def_flavs;
3418 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3419 nflavs = 2;
3420 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3421 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3422 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3423 nflavs = 1;
3424 flavs[0].pseudoflavor
3425 = svcauth_gss_flavor(exp->ex_client);
3426 } else {
3427 nflavs = 1;
3428 flavs[0].pseudoflavor
3429 = exp->ex_client->flavour->flavour;
3430 }
3431 }
3432
676e4ebd 3433 supported = 0;
d0a381dd
BF		 3434 p = xdr_reserve_space(xdr, 4);
3435 if (!p)
3436 goto out;
676e4ebd 3437 flavorsp = p++; /* to be backfilled later */
676e4ebd 3438
4796f457 3439 for (i = 0; i < nflavs; i++) {
676e4ebd 3440 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3441 struct rpcsec_gss_info info;
dcb488a3 3442
676e4ebd
CL		 3443 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3444 supported++;
d0a381dd
BF		 3445 p = xdr_reserve_space(xdr, 4 + 4 +
3446 XDR_LEN(info.oid.len) + 4 + 4);
3447 if (!p)
3448 goto out;
c373b0a4 3449 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3450 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3451 *p++ = cpu_to_be32(info.qop);
3452 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3453 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3454 supported++;
d0a381dd
BF		 3455 p = xdr_reserve_space(xdr, 4);
3456 if (!p)
3457 goto out;
c373b0a4 3458 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3459 } else {
3460 if (report)
3461 pr_warn("NFS: SECINFO: security flavor %u "
3462 "is not supported\n", pf);
dcb488a3
AA		 3463 }
3464 }
a77c806f 3465
676e4ebd
CL		 3466 if (nflavs != supported)
3467 report = false;
3468 *flavorsp = htonl(supported);
d0a381dd 3469 nfserr = 0;
dcb488a3
AA		 3470out:
3471 if (exp)
3472 exp_put(exp);
695e12f8 3473 return nfserr;
dcb488a3
AA		 3474}
3475
22b6dee8
MJ		 3476static __be32
3477nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3478 struct nfsd4_secinfo *secinfo)
3479{
d0a381dd
BF		 3480 struct xdr_stream *xdr = &resp->xdr;
3481
3482 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3483}
3484
3485static __be32
3486nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3487 struct nfsd4_secinfo_no_name *secinfo)
3488{
d0a381dd
BF		 3489 struct xdr_stream *xdr = &resp->xdr;
3490
3491 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3492}
3493
1da177e4
LT		 3494/*
3495 * The SETATTR encode routine is special -- it always encodes a bitmap,
3496 * regardless of the error status.
3497 */
695e12f8 3498static __be32
b37ad28b 3499nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3500{
d0a381dd 3501 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3502 __be32 *p;
1da177e4 3503
d0a381dd
BF		 3504 p = xdr_reserve_space(xdr, 16);
3505 if (!p)
3506 return nfserr_resource;
1da177e4 3507 if (nfserr) {
c373b0a4
BF		 3508 *p++ = cpu_to_be32(3);
3509 *p++ = cpu_to_be32(0);
3510 *p++ = cpu_to_be32(0);
3511 *p++ = cpu_to_be32(0);
1da177e4
LT		 3512 }
3513 else {
c373b0a4
BF		 3514 *p++ = cpu_to_be32(3);
3515 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3516 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3517 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3518 }
695e12f8 3519 return nfserr;
1da177e4
LT		 3520}
3521
695e12f8 3522static __be32
b37ad28b 3523nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3524{
d0a381dd 3525 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3526 __be32 *p;
1da177e4
LT		 3527
3528 if (!nfserr) {
d0a381dd
BF		 3529 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3530 if (!p)
3531 return nfserr_resource;
0c0c267b
BF		 3532 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3533 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3534 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3535 }
3536 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3537 p = xdr_reserve_space(xdr, 8);
3538 if (!p)
3539 return nfserr_resource;
c373b0a4
BF		 3540 *p++ = cpu_to_be32(0);
3541 *p++ = cpu_to_be32(0);
1da177e4 3542 }
695e12f8 3543 return nfserr;
1da177e4
LT		 3544}
3545
695e12f8 3546static __be32
b37ad28b 3547nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3548{
d0a381dd 3549 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3550 __be32 *p;
1da177e4
LT		 3551
3552 if (!nfserr) {
d0a381dd
BF		 3553 p = xdr_reserve_space(xdr, 16);
3554 if (!p)
3555 return nfserr_resource;
c373b0a4
BF		 3556 *p++ = cpu_to_be32(write->wr_bytes_written);
3557 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3558 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3559 NFS4_VERIFIER_SIZE);
1da177e4 3560 }
695e12f8 3561 return nfserr;
1da177e4
LT		 3562}
3563
57266a6e
BF		 3564static const u32 nfs4_minimal_spo_must_enforce[2] = {
3565 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3566 1 << (OP_EXCHANGE_ID - 32) |
3567 1 << (OP_CREATE_SESSION - 32) |
3568 1 << (OP_DESTROY_SESSION - 32) |
3569 1 << (OP_DESTROY_CLIENTID - 32)
3570};
3571
2db134eb 3572static __be32
57b7b43b 3573nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3574 struct nfsd4_exchange_id *exid)
3575{
d0a381dd 3576 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3577 __be32 *p;
0733d213
AA		 3578 char *major_id;
3579 char *server_scope;
3580 int major_id_sz;
3581 int server_scope_sz;
3582 uint64_t minor_id = 0;
3583
3584 if (nfserr)
3585 return nfserr;
3586
3587 major_id = utsname()->nodename;
3588 major_id_sz = strlen(major_id);
3589 server_scope = utsname()->nodename;
3590 server_scope_sz = strlen(server_scope);
3591
d0a381dd 3592 p = xdr_reserve_space(xdr,
0733d213
AA		 3593 8 /* eir_clientid */ +
3594 4 /* eir_sequenceid */ +
3595 4 /* eir_flags */ +
a8bb84bc 3596 4 /* spr_how */);
d0a381dd
BF		 3597 if (!p)
3598 return nfserr_resource;
0733d213 3599
0c0c267b 3600 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3601 *p++ = cpu_to_be32(exid->seqid);
3602 *p++ = cpu_to_be32(exid->flags);
0733d213 3603
c373b0a4 3604 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3605
57266a6e
BF		 3606 switch (exid->spa_how) {
3607 case SP4_NONE:
3608 break;
3609 case SP4_MACH_CRED:
a8bb84bc 3610 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3611 p = xdr_reserve_space(xdr, 16);
3612 if (!p)
3613 return nfserr_resource;
a8bb84bc 3614
57266a6e 3615 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3616 *p++ = cpu_to_be32(2);
3617 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3618 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3619 /* empty spo_must_allow bitmap: */
c373b0a4 3620 *p++ = cpu_to_be32(0);
a8bb84bc 3621
57266a6e
BF		 3622 break;
3623 default:
3624 WARN_ON_ONCE(1);
3625 }
0733d213 3626
d0a381dd 3627 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3628 8 /* so_minor_id */ +
3629 4 /* so_major_id.len */ +
3630 (XDR_QUADLEN(major_id_sz) * 4) +
3631 4 /* eir_server_scope.len */ +
3632 (XDR_QUADLEN(server_scope_sz) * 4) +
3633 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3634 if (!p)
3635 return nfserr_resource;
a8bb84bc 3636
0733d213 3637 /* The server_owner struct */
b64c7f3b 3638 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3639 /* major id */
0c0c267b 3640 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3641
3642 /* Server scope */
0c0c267b 3643 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3644
3645 /* Implementation id */
c373b0a4 3646 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3647 return 0;
2db134eb
AA		 3648}
3649
3650static __be32
57b7b43b 3651nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3652 struct nfsd4_create_session *sess)
3653{
d0a381dd 3654 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3655 __be32 *p;
ec6b5d7b
AA		 3656
3657 if (nfserr)
3658 return nfserr;
3659
d0a381dd
BF		 3660 p = xdr_reserve_space(xdr, 24);
3661 if (!p)
3662 return nfserr_resource;
0c0c267b
BF		 3663 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3664 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3665 *p++ = cpu_to_be32(sess->seqid);
3666 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3667
d0a381dd
BF		 3668 p = xdr_reserve_space(xdr, 28);
3669 if (!p)
3670 return nfserr_resource;
c373b0a4
BF		 3671 *p++ = cpu_to_be32(0); /* headerpadsz */
3672 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3673 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3674 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3675 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3676 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3677 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3678
3679 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3680 p = xdr_reserve_space(xdr, 4);
3681 if (!p)
3682 return nfserr_resource;
c373b0a4 3683 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3684 }
3685
d0a381dd
BF		 3686 p = xdr_reserve_space(xdr, 28);
3687 if (!p)
3688 return nfserr_resource;
c373b0a4
BF		 3689 *p++ = cpu_to_be32(0); /* headerpadsz */
3690 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3691 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3692 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3693 *p++ = cpu_to_be32(sess->back_channel.maxops);
3694 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3695 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3696
3697 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3698 p = xdr_reserve_space(xdr, 4);
3699 if (!p)
3700 return nfserr_resource;
c373b0a4 3701 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3702 }
3703 return 0;
2db134eb
AA		 3704}
3705
c47d832b 3706static __be32
57b7b43b 3707nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3708 struct nfsd4_sequence *seq)
3709{
d0a381dd 3710 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3711 __be32 *p;
b85d4c01
BH		 3712
3713 if (nfserr)
3714 return nfserr;
3715
d0a381dd
BF		 3716 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3717 if (!p)
3718 return nfserr_resource;
0c0c267b
BF		 3719 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3720 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3721 *p++ = cpu_to_be32(seq->seqid);
3722 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3723 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3724 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3725 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3726 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3727
f5236013 3728 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3729 return 0;
2db134eb
AA		 3730}
3731
2355c596 3732static __be32
57b7b43b 3733nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3734 struct nfsd4_test_stateid *test_stateid)
3735{
d0a381dd 3736 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3737 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3738 __be32 *p;
17456804 3739
a11fcce1
BF		 3740 if (nfserr)
3741 return nfserr;
3742
d0a381dd
BF		 3743 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3744 if (!p)
3745 return nfserr_resource;
17456804 3746 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3747
03cfb420 3748 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3749 *p++ = stateid->ts_id_status;
17456804 3750 }
17456804
BS		 3751
3752 return nfserr;
3753}
3754
695e12f8
BH		 3755static __be32
3756nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3757{
3758 return nfserr;
3759}
3760
3761typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3762
2db134eb
AA		 3763/*
3764 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3765 * since we don't need to filter out obsolete ops as this is
3766 * done in the decoding phase.
3767 */
695e12f8 3768static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3769 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3770 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3771 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3772 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3773 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3774 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3775 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3776 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3777 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3778 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3779 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3780 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3781 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3782 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3783 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3784 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3785 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3786 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3787 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3788 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3789 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3790 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3791 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3792 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3793 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3794 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3795 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3796 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3797 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3798 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3799 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3800 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3801 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3802 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3803 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3804 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3805 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3806
3807 /* NFSv4.1 operations */
3808 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3809 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3810 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3811 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3812 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3813 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3814 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3817 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3818 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3819 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3820 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3821 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3822 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3823 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3824 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3825 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3826 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3827};
3828
496c262c 3829/*
a8095f7e
BF		 3830 * Calculate whether we still have space to encode repsize bytes.
3831 * There are two considerations:
3832 * - For NFS versions >=4.1, the size of the reply must stay within
3833 * session limits
3834 * - For all NFS versions, we must stay within limited preallocated
3835 * buffer space.
496c262c 3836 *
a8095f7e
BF		 3837 * This is called before the operation is processed, so can only provide
3838 * an upper estimate. For some nonidempotent operations (such as
3839 * getattr), it's not necessarily a problem if that estimate is wrong,
3840 * as we can fail it after processing without significant side effects.
496c262c 3841 */
a8095f7e 3842__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3843{
67492c99 3844 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3845 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3846
47ee5298
BF		 3847 if (buf->len + respsize <= buf->buflen)
3848 return nfs_ok;
3849 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3850 return nfserr_resource;
47ee5298
BF		 3851 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3852 WARN_ON_ONCE(1);
3853 return nfserr_rep_too_big_to_cache;
ea8d7720 3854 }
47ee5298 3855 return nfserr_rep_too_big;
496c262c
AA		 3856}
3857
1da177e4
LT		 3858void
3859nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3860{
082d4bd7 3861 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3862 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3863 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3864 int post_err_offset;
07d1f802 3865 nfsd4_enc encoder;
bc749ca4 3866 __be32 *p;
1da177e4 3867
d0a381dd
BF		 3868 p = xdr_reserve_space(xdr, 8);
3869 if (!p) {
3870 WARN_ON_ONCE(1);
3871 return;
3872 }
c373b0a4 3873 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3874 post_err_offset = xdr->buf->len;
1da177e4 3875
695e12f8
BH		 3876 if (op->opnum == OP_ILLEGAL)
3877 goto status;
3878 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3879 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3880 encoder = nfsd4_enc_ops[op->opnum];
3881 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3882 xdr_commit_encode(xdr);
3883
067e1ace 3884 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3885 if (!op->status) {
3886 int space_needed = 0;
3887 if (!nfsd4_last_compound_op(rqstp))
3888 space_needed = COMPOUND_ERR_SLACK_SPACE;
3889 op->status = nfsd4_check_resp_size(resp, space_needed);
3890 }
c8f13d97
BF		 3891 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3892 struct nfsd4_slot *slot = resp->cstate.slot;
3893
3894 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3895 op->status = nfserr_rep_too_big_to_cache;
3896 else
3897 op->status = nfserr_rep_too_big;
3898 }
07d1f802
BF		 3899 if (op->status == nfserr_resource ||
3900 op->status == nfserr_rep_too_big ||
3901 op->status == nfserr_rep_too_big_to_cache) {
3902 /*
3903 * The operation may have already been encoded or
3904 * partially encoded. No op returns anything additional
3905 * in the case of one of these three errors, so we can
3906 * just truncate back to after the status. But it's a
3907 * bug if we had to do this on a non-idempotent op:
3908 */
3909 warn_on_nonidempotent_op(op);
082d4bd7 3910 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3911 }
9411b1d4 3912 if (so) {
082d4bd7
BF		 3913 int len = xdr->buf->len - post_err_offset;
3914
9411b1d4 3915 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3916 so->so_replay.rp_buflen = len;
3917 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3918 so->so_replay.rp_buf, len);
9411b1d4 3919 }
695e12f8 3920status:
082d4bd7
BF		 3921 /* Note that op->status is already in network byte order: */
3922 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3923}
3924
3925/*
3926 * Encode the reply stored in the stateowner reply cache
3927 *
3928 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3929 * previously sent already encoded operation.
3930 *
3931 * called with nfs4_lock_state() held
3932 */
3933void
d0a381dd 3934nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3935{
bc749ca4 3936 __be32 *p;
1da177e4
LT		 3937 struct nfs4_replay *rp = op->replay;
3938
3939 BUG_ON(!rp);
3940
d0a381dd
BF		 3941 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3942 if (!p) {
3943 WARN_ON_ONCE(1);
3944 return;
3945 }
c373b0a4 3946 *p++ = cpu_to_be32(op->opnum);
1da177e4 3947 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3948
0c0c267b 3949 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3950}
3951
1da177e4 3952int
2ebbc012 3953nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3954{
3955 return xdr_ressize_check(rqstp, p);
3956}
3957
3e98abff 3958int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3959{
3e98abff
BF		 3960 struct svc_rqst *rqstp = rq;
3961 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3962
1da177e4
LT		 3963 if (args->ops != args->iops) {
3964 kfree(args->ops);
3965 args->ops = args->iops;
3966 }
f99d49ad
JJ		 3967 kfree(args->tmpp);
3968 args->tmpp = NULL;
1da177e4
LT		 3969 while (args->to_free) {
3970 struct tmpbuf *tb = args->to_free;
3971 args->to_free = tb->next;
ce043ac8 3972 kfree(tb->buf);
1da177e4
LT		 3973 kfree(tb);
3974 }
3e98abff 3975 return 1;
1da177e4
LT		 3976}
3977
3978int
2ebbc012 3979nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3980{
e874f9f8
JL		 3981 if (rqstp->rq_arg.head[0].iov_len % 4) {
3982 /* client is nuts */
3983 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3984 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3985 return 0;
3986 }
1da177e4
LT		 3987 args->p = p;
3988 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3989 args->pagelist = rqstp->rq_arg.pages;
3990 args->pagelen = rqstp->rq_arg.page_len;
3991 args->tmpp = NULL;
3992 args->to_free = NULL;
3993 args->ops = args->iops;
3994 args->rqstp = rqstp;
3995
3e98abff 3996 return !nfsd4_decode_compound(args);
1da177e4
LT		 3997}
3998
3999int
2ebbc012 4000nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4001{
4002 /*
4003 * All that remains is to write the tag and operation count...
4004 */
557ce264 4005 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4006 struct xdr_buf *buf = resp->xdr.buf;
4007
4008 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4009 buf->tail[0].iov_len);
dd97fdde 4010
2825a7f9
BF		 4011 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4012
1da177e4
LT		 4013 p = resp->tagp;
4014 *p++ = htonl(resp->taglen);
4015 memcpy(p, resp->tag, resp->taglen);
4016 p += XDR_QUADLEN(resp->taglen);
4017 *p++ = htonl(resp->opcnt);
4018
26c0c75e 4019 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4020 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4021 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4022 if (cs->status != nfserr_replay_cache) {
4023 nfsd4_store_cache_entry(resp);
73e79482 4024 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4025 }
d7682988 4026 /* Renew the clientid on success and on replay */
f0f51f5c 4027 spin_lock(&nn->client_lock);
221a6876 4028 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4029 spin_unlock(&nn->client_lock);
4030 put_client_renew(clp);
da3846a2 4031 }
1da177e4
LT		 4032 return 1;
4033}
4034
4035/*
4036 * Local variables:
4037 * c-basic-offset: 8
4038 * End:
4039 */
Linux 6.x block layer and io_uring tree(s)