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nfs: fix nfs4d readlink truncated packet
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <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
185 * @argp: NFSv4 compound argument structure to be freed with
186 * @release: release callback to free @p, typically kfree()
187 * @p: pointer to be freed
188 *
189 * Marks @p to be freed when processing the compound operation
190 * described in @argp finishes.
191 */
1da177e4
LT		 192static int
193defer_free(struct nfsd4_compoundargs *argp,
194 void (*release)(const void *), void *p)
195{
196 struct tmpbuf *tb;
197
198 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
199 if (!tb)
200 return -ENOMEM;
201 tb->buf = p;
202 tb->release = release;
203 tb->next = argp->to_free;
204 argp->to_free = tb;
205 return 0;
206}
207
2d8498db
CH		 208/**
209 * savemem - duplicate a chunk of memory for later processing
210 * @argp: NFSv4 compound argument structure to be freed with
211 * @p: pointer to be duplicated
212 * @nbytes: length to be duplicated
213 *
214 * Returns a pointer to a copy of @nbytes bytes of memory at @p
215 * that are preserved until processing of the NFSv4 compound
216 * operation described by @argp finishes.
217 */
2ebbc012 218static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 219{
1da177e4 220 if (p == argp->tmp) {
67114fe6 221 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 222 if (!p)
223 return NULL;
1da177e4 224 } else {
73dff8be 225 BUG_ON(p != argp->tmpp);
1da177e4
LT		 226 argp->tmpp = NULL;
227 }
228 if (defer_free(argp, kfree, p)) {
a4db5fe5 229 kfree(p);
1da177e4
LT		 230 return NULL;
231 } else
232 return (char *)p;
233}
234
b37ad28b 235static __be32
1da177e4
LT		 236nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
237{
238 u32 bmlen;
239 DECODE_HEAD;
240
241 bmval[0] = 0;
242 bmval[1] = 0;
7e705706 243 bmval[2] = 0;
1da177e4
LT		 244
245 READ_BUF(4);
06553991 246 bmlen = be32_to_cpup(p++);
1da177e4
LT		 247 if (bmlen > 1000)
248 goto xdr_error;
249
250 READ_BUF(bmlen << 2);
251 if (bmlen > 0)
06553991 252 bmval[0] = be32_to_cpup(p++);
1da177e4 253 if (bmlen > 1)
06553991 254 bmval[1] = be32_to_cpup(p++);
7e705706 255 if (bmlen > 2)
06553991 256 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 257
258 DECODE_TAIL;
259}
260
b37ad28b 261static __be32
3c8e0316 262nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 263 struct iattr *iattr, struct nfs4_acl **acl,
264 struct xdr_netobj *label)
1da177e4
LT		 265{
266 int expected_len, len = 0;
267 u32 dummy32;
542d1ab3 268 u64 sec;
1da177e4
LT		 269 char *buf;
270
271 DECODE_HEAD;
272 iattr->ia_valid = 0;
273 if ((status = nfsd4_decode_bitmap(argp, bmval)))
274 return status;
275
1da177e4 276 READ_BUF(4);
06553991 277 expected_len = be32_to_cpup(p++);
1da177e4
LT		 278
279 if (bmval[0] & FATTR4_WORD0_SIZE) {
280 READ_BUF(8);
281 len += 8;
542d1ab3 282 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 283 iattr->ia_valid |= ATTR_SIZE;
284 }
285 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 286 u32 nace;
28e05dd8 287 struct nfs4_ace *ace;
1da177e4
LT		 288
289 READ_BUF(4); len += 4;
06553991 290 nace = be32_to_cpup(p++);
1da177e4 291
28e05dd8 292 if (nace > NFS4_ACL_MAX)
798df338 293 return nfserr_fbig;
28e05dd8
BF		 294
295 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 296 if (*acl == NULL)
297 return nfserr_jukebox;
298
28e05dd8 299 defer_free(argp, kfree, *acl);
1da177e4 300
28e05dd8
BF		 301 (*acl)->naces = nace;
302 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 303 READ_BUF(16); len += 16;
06553991
BF		 304 ace->type = be32_to_cpup(p++);
305 ace->flag = be32_to_cpup(p++);
306 ace->access_mask = be32_to_cpup(p++);
307 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 308 READ_BUF(dummy32);
309 len += XDR_QUADLEN(dummy32) << 2;
310 READMEM(buf, dummy32);
28e05dd8 311 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 312 status = nfs_ok;
28e05dd8 313 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 314 ;
28e05dd8 315 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 316 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 317 buf, dummy32, &ace->who_gid);
1da177e4 318 else
3c726023 319 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 320 buf, dummy32, &ace->who_uid);
3c726023
BF		 321 if (status)
322 return status;
1da177e4
LT		 323 }
324 } else
325 *acl = NULL;
326 if (bmval[1] & FATTR4_WORD1_MODE) {
327 READ_BUF(4);
328 len += 4;
06553991 329 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 330 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
331 iattr->ia_valid |= ATTR_MODE;
332 }
333 if (bmval[1] & FATTR4_WORD1_OWNER) {
334 READ_BUF(4);
335 len += 4;
06553991 336 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 337 READ_BUF(dummy32);
338 len += (XDR_QUADLEN(dummy32) << 2);
339 READMEM(buf, dummy32);
47c85291
N		 340 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
341 return status;
1da177e4
LT		 342 iattr->ia_valid |= ATTR_UID;
343 }
344 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
345 READ_BUF(4);
346 len += 4;
06553991 347 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 348 READ_BUF(dummy32);
349 len += (XDR_QUADLEN(dummy32) << 2);
350 READMEM(buf, dummy32);
47c85291
N		 351 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
352 return status;
1da177e4
LT		 353 iattr->ia_valid |= ATTR_GID;
354 }
355 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
356 READ_BUF(4);
357 len += 4;
06553991 358 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 359 switch (dummy32) {
360 case NFS4_SET_TO_CLIENT_TIME:
361 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
362 all 32 bits of 'nseconds'. */
363 READ_BUF(12);
364 len += 12;
542d1ab3
BF		 365 p = xdr_decode_hyper(p, &sec);
366 iattr->ia_atime.tv_sec = (time_t)sec;
06553991 367 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
1da177e4
LT		 379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
06553991 382 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
542d1ab3
BF		 389 p = xdr_decode_hyper(p, &sec);
390 iattr->ia_mtime.tv_sec = sec;
06553991 391 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 392 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
393 return nfserr_inval;
394 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
395 break;
396 case NFS4_SET_TO_SERVER_TIME:
397 iattr->ia_valid |= ATTR_MTIME;
398 break;
399 default:
400 goto xdr_error;
401 }
402 }
18032ca0
DQ		 403
404 label->len = 0;
405#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
406 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
407 READ_BUF(4);
408 len += 4;
06553991 409 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 410 READ_BUF(4);
411 len += 4;
06553991 412 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 413 READ_BUF(4);
414 len += 4;
06553991 415 dummy32 = be32_to_cpup(p++);
18032ca0
DQ		 416 READ_BUF(dummy32);
417 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
418 return nfserr_badlabel;
419 len += (XDR_QUADLEN(dummy32) << 2);
420 READMEM(buf, dummy32);
421 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
422 if (!label->data)
423 return nfserr_jukebox;
3378b7f4 424 label->len = dummy32;
18032ca0
DQ		 425 defer_free(argp, kfree, label->data);
426 memcpy(label->data, buf, dummy32);
427 }
428#endif
429
3c8e0316
YZ		 430 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
431 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
432 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
433 READ_BUF(expected_len - len);
434 else if (len != expected_len)
1da177e4
LT		 435 goto xdr_error;
436
437 DECODE_TAIL;
1da177e4
LT		 438}
439
e31a1b66
BH		 440static __be32
441nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
442{
443 DECODE_HEAD;
444
445 READ_BUF(sizeof(stateid_t));
06553991 446 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 447 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
448
449 DECODE_TAIL;
450}
451
b37ad28b 452static __be32
1da177e4
LT		 453nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
454{
455 DECODE_HEAD;
456
457 READ_BUF(4);
06553991 458 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 459
460 DECODE_TAIL;
461}
462
acb2887e
BF		 463static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
464{
465 DECODE_HEAD;
12fc3e92 466 u32 dummy, uid, gid;
acb2887e
BF		 467 char *machine_name;
468 int i;
469 int nr_secflavs;
470
471 /* callback_sec_params4 */
472 READ_BUF(4);
06553991 473 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 474 if (nr_secflavs)
475 cbs->flavor = (u32)(-1);
476 else
477 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
478 cbs->flavor = 0;
acb2887e
BF		 479 for (i = 0; i < nr_secflavs; ++i) {
480 READ_BUF(4);
06553991 481 dummy = be32_to_cpup(p++);
acb2887e
BF		 482 switch (dummy) {
483 case RPC_AUTH_NULL:
484 /* Nothing to read */
12fc3e92
BF		 485 if (cbs->flavor == (u32)(-1))
486 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 487 break;
488 case RPC_AUTH_UNIX:
489 READ_BUF(8);
490 /* stamp */
06553991 491 dummy = be32_to_cpup(p++);
acb2887e
BF		 492
493 /* machine name */
06553991 494 dummy = be32_to_cpup(p++);
acb2887e
BF		 495 READ_BUF(dummy);
496 SAVEMEM(machine_name, dummy);
497
498 /* uid, gid */
499 READ_BUF(8);
06553991
BF		 500 uid = be32_to_cpup(p++);
501 gid = be32_to_cpup(p++);
acb2887e
BF		 502
503 /* more gids */
504 READ_BUF(4);
06553991 505 dummy = be32_to_cpup(p++);
acb2887e 506 READ_BUF(dummy * 4);
12fc3e92 507 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 508 kuid_t kuid = make_kuid(&init_user_ns, uid);
509 kgid_t kgid = make_kgid(&init_user_ns, gid);
510 if (uid_valid(kuid) && gid_valid(kgid)) {
511 cbs->uid = kuid;
512 cbs->gid = kgid;
513 cbs->flavor = RPC_AUTH_UNIX;
514 } else {
515 dprintk("RPC_AUTH_UNIX with invalid"
516 "uid or gid ignoring!\n");
517 }
12fc3e92 518 }
acb2887e
BF		 519 break;
520 case RPC_AUTH_GSS:
521 dprintk("RPC_AUTH_GSS callback secflavor "
522 "not supported!\n");
523 READ_BUF(8);
524 /* gcbp_service */
06553991 525 dummy = be32_to_cpup(p++);
acb2887e 526 /* gcbp_handle_from_server */
06553991 527 dummy = be32_to_cpup(p++);
acb2887e
BF		 528 READ_BUF(dummy);
529 p += XDR_QUADLEN(dummy);
530 /* gcbp_handle_from_client */
531 READ_BUF(4);
06553991 532 dummy = be32_to_cpup(p++);
acb2887e
BF		 533 READ_BUF(dummy);
534 break;
535 default:
536 dprintk("Illegal callback secflavor\n");
537 return nfserr_inval;
538 }
539 }
540 DECODE_TAIL;
541}
542
cb73a9f4
BF		 543static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
544{
545 DECODE_HEAD;
546
547 READ_BUF(4);
06553991 548 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 549 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
550
551 DECODE_TAIL;
552}
553
1d1bc8f2
BF		 554static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
555{
556 DECODE_HEAD;
1d1bc8f2
BF		 557
558 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
559 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 560 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 561 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
562 * could help us figure out we should be using it. */
1d1bc8f2
BF		 563 DECODE_TAIL;
564}
565
b37ad28b 566static __be32
1da177e4
LT		 567nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
568{
569 DECODE_HEAD;
570
e31a1b66 571 READ_BUF(4);
06553991 572 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 573 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 574
575 DECODE_TAIL;
576}
577
578
b37ad28b 579static __be32
1da177e4
LT		 580nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
581{
582 DECODE_HEAD;
583
584 READ_BUF(12);
542d1ab3 585 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 586 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 587
588 DECODE_TAIL;
589}
590
b37ad28b 591static __be32
1da177e4
LT		 592nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
593{
594 DECODE_HEAD;
595
596 READ_BUF(4);
06553991 597 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 598 switch (create->cr_type) {
599 case NF4LNK:
600 READ_BUF(4);
06553991 601 create->cr_linklen = be32_to_cpup(p++);
1da177e4 602 READ_BUF(create->cr_linklen);
76f47128
BF		 603 /*
604 * The VFS will want a null-terminated string, and
605 * null-terminating in place isn't safe since this might
606 * end on a page boundary:
607 */
608 create->cr_linkname =
609 kmalloc(create->cr_linklen + 1, GFP_KERNEL);
610 if (!create->cr_linkname)
611 return nfserr_jukebox;
612 memcpy(create->cr_linkname, p, create->cr_linklen);
613 create->cr_linkname[create->cr_linklen] = '\0';
614 defer_free(argp, kfree, create->cr_linkname);
1da177e4
LT		 615 break;
616 case NF4BLK:
617 case NF4CHR:
618 READ_BUF(8);
06553991
BF		 619 create->cr_specdata1 = be32_to_cpup(p++);
620 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 621 break;
622 case NF4SOCK:
623 case NF4FIFO:
624 case NF4DIR:
625 default:
626 break;
627 }
628
629 READ_BUF(4);
06553991 630 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 631 READ_BUF(create->cr_namelen);
632 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 633 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 634 return status;
635
3c8e0316 636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 637 &create->cr_acl, &create->cr_label);
c0d6fc8a 638 if (status)
1da177e4
LT		 639 goto out;
640
641 DECODE_TAIL;
642}
643
b37ad28b 644static inline __be32
1da177e4
LT		 645nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
646{
e31a1b66 647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 648}
649
b37ad28b 650static inline __be32
1da177e4
LT		 651nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
652{
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
654}
655
b37ad28b 656static __be32
1da177e4
LT		 657nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
658{
659 DECODE_HEAD;
660
661 READ_BUF(4);
06553991 662 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 663 READ_BUF(link->li_namelen);
664 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 665 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 666 return status;
667
668 DECODE_TAIL;
669}
670
b37ad28b 671static __be32
1da177e4
LT		 672nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
673{
674 DECODE_HEAD;
675
1da177e4
LT		 676 /*
677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
678 */
679 READ_BUF(28);
06553991 680 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
682 goto xdr_error;
06553991 683 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 684 p = xdr_decode_hyper(p, &lock->lk_offset);
685 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 686 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 687
688 if (lock->lk_is_new) {
e31a1b66 689 READ_BUF(4);
06553991 690 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
692 if (status)
693 return status;
694 READ_BUF(8 + sizeof(clientid_t));
06553991 695 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 697 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 698 READ_BUF(lock->lk_new_owner.len);
699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
700 } else {
e31a1b66
BH		 701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
702 if (status)
703 return status;
704 READ_BUF(4);
06553991 705 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 706 }
707
708 DECODE_TAIL;
709}
710
b37ad28b 711static __be32
1da177e4
LT		 712nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
713{
714 DECODE_HEAD;
715
716 READ_BUF(32);
06553991 717 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
719 goto xdr_error;
542d1ab3
BF		 720 p = xdr_decode_hyper(p, &lockt->lt_offset);
721 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 722 COPYMEM(&lockt->lt_clientid, 8);
06553991 723 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 724 READ_BUF(lockt->lt_owner.len);
725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
726
727 DECODE_TAIL;
728}
729
b37ad28b 730static __be32
1da177e4
LT		 731nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
732{
733 DECODE_HEAD;
734
e31a1b66 735 READ_BUF(8);
06553991 736 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
738 goto xdr_error;
06553991 739 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
741 if (status)
742 return status;
743 READ_BUF(16);
542d1ab3
BF		 744 p = xdr_decode_hyper(p, &locku->lu_offset);
745 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 746
747 DECODE_TAIL;
748}
749
b37ad28b 750static __be32
1da177e4
LT		 751nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
752{
753 DECODE_HEAD;
754
755 READ_BUF(4);
06553991 756 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 757 READ_BUF(lookup->lo_len);
758 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 759 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 760 return status;
761
762 DECODE_TAIL;
763}
764
2c8bd7e0 765static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 766{
767 __be32 *p;
768 u32 w;
769
770 READ_BUF(4);
06553991 771 w = be32_to_cpup(p++);
2c8bd7e0
BH		 772 *share_access = w & NFS4_SHARE_ACCESS_MASK;
773 *deleg_want = w & NFS4_SHARE_WANT_MASK;
774 if (deleg_when)
775 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
776
04f9e664
BF		 777 switch (w & NFS4_SHARE_ACCESS_MASK) {
778 case NFS4_SHARE_ACCESS_READ:
779 case NFS4_SHARE_ACCESS_WRITE:
780 case NFS4_SHARE_ACCESS_BOTH:
781 break;
782 default:
783 return nfserr_bad_xdr;
784 }
fc0d14fe 785 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 786 if (!w)
787 return nfs_ok;
788 if (!argp->minorversion)
789 return nfserr_bad_xdr;
790 switch (w & NFS4_SHARE_WANT_MASK) {
791 case NFS4_SHARE_WANT_NO_PREFERENCE:
792 case NFS4_SHARE_WANT_READ_DELEG:
793 case NFS4_SHARE_WANT_WRITE_DELEG:
794 case NFS4_SHARE_WANT_ANY_DELEG:
795 case NFS4_SHARE_WANT_NO_DELEG:
796 case NFS4_SHARE_WANT_CANCEL:
797 break;
798 default:
799 return nfserr_bad_xdr;
800 }
92bac8c5 801 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 802 if (!w)
803 return nfs_ok;
2c8bd7e0
BH		 804
805 if (!deleg_when) /* open_downgrade */
806 return nfserr_inval;
04f9e664
BF		 807 switch (w) {
808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 812 return nfs_ok;
813 }
814xdr_error:
815 return nfserr_bad_xdr;
816}
817
818static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
819{
820 __be32 *p;
821
822 READ_BUF(4);
06553991 823 *x = be32_to_cpup(p++);
04f9e664 824 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 825 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 826 return nfserr_bad_xdr;
827 return nfs_ok;
828xdr_error:
829 return nfserr_bad_xdr;
830}
831
a084daf5
BF		 832static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
833{
834 __be32 *p;
835
836 READ_BUF(4);
06553991 837 o->len = be32_to_cpup(p++);
a084daf5
BF		 838
839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
840 return nfserr_bad_xdr;
841
842 READ_BUF(o->len);
843 SAVEMEM(o->data, o->len);
844 return nfs_ok;
845xdr_error:
846 return nfserr_bad_xdr;
847}
848
b37ad28b 849static __be32
1da177e4
LT		 850nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
851{
852 DECODE_HEAD;
2c8bd7e0 853 u32 dummy;
1da177e4
LT		 854
855 memset(open->op_bmval, 0, sizeof(open->op_bmval));
856 open->op_iattr.ia_valid = 0;
fe0750e5 857 open->op_openowner = NULL;
1da177e4 858
9d313b17 859 open->op_xdr_error = 0;
1da177e4 860 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 861 READ_BUF(4);
06553991 862 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 863 /* decode, yet ignore deleg_when until supported */
864 status = nfsd4_decode_share_access(argp, &open->op_share_access,
865 &open->op_deleg_want, &dummy);
04f9e664
BF		 866 if (status)
867 goto xdr_error;
868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
869 if (status)
870 goto xdr_error;
a084daf5 871 READ_BUF(sizeof(clientid_t));
1da177e4 872 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 873 status = nfsd4_decode_opaque(argp, &open->op_owner);
874 if (status)
875 goto xdr_error;
876 READ_BUF(4);
06553991 877 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 878 switch (open->op_create) {
879 case NFS4_OPEN_NOCREATE:
880 break;
881 case NFS4_OPEN_CREATE:
882 READ_BUF(4);
06553991 883 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 884 switch (open->op_createmode) {
885 case NFS4_CREATE_UNCHECKED:
886 case NFS4_CREATE_GUARDED:
c0d6fc8a 887 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 888 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 889 if (status)
1da177e4
LT		 890 goto out;
891 break;
892 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 893 READ_BUF(NFS4_VERIFIER_SIZE);
894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 895 break;
79fb54ab
BH		 896 case NFS4_CREATE_EXCLUSIVE4_1:
897 if (argp->minorversion < 1)
898 goto xdr_error;
ab4684d1
CL		 899 READ_BUF(NFS4_VERIFIER_SIZE);
900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 901 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 902 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 903 if (status)
904 goto out;
905 break;
1da177e4
LT		 906 default:
907 goto xdr_error;
908 }
909 break;
910 default:
911 goto xdr_error;
912 }
913
914 /* open_claim */
915 READ_BUF(4);
06553991 916 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 917 switch (open->op_claim_type) {
918 case NFS4_OPEN_CLAIM_NULL:
919 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
920 READ_BUF(4);
06553991 921 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 922 READ_BUF(open->op_fname.len);
923 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 924 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 925 return status;
926 break;
927 case NFS4_OPEN_CLAIM_PREVIOUS:
928 READ_BUF(4);
06553991 929 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 930 break;
931 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
933 if (status)
934 return status;
935 READ_BUF(4);
06553991 936 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 937 READ_BUF(open->op_fname.len);
938 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 939 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 940 return status;
941 break;
8b289b2c
BF		 942 case NFS4_OPEN_CLAIM_FH:
943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
944 if (argp->minorversion < 1)
945 goto xdr_error;
946 /* void */
947 break;
948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
949 if (argp->minorversion < 1)
950 goto xdr_error;
951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
952 if (status)
953 return status;
954 break;
1da177e4
LT		 955 default:
956 goto xdr_error;
957 }
958
959 DECODE_TAIL;
960}
961
b37ad28b 962static __be32
1da177e4
LT		 963nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
964{
965 DECODE_HEAD;
e1a90ebd
AS		 966
967 if (argp->minorversion >= 1)
968 return nfserr_notsupp;
969
e31a1b66
BH		 970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
971 if (status)
972 return status;
973 READ_BUF(4);
06553991 974 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 975
1da177e4
LT		 976 DECODE_TAIL;
977}
978
b37ad28b 979static __be32
1da177e4
LT		 980nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
981{
982 DECODE_HEAD;
983
e31a1b66
BH		 984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
985 if (status)
986 return status;
04f9e664 987 READ_BUF(4);
06553991 988 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
990 &open_down->od_deleg_want, NULL);
04f9e664
BF		 991 if (status)
992 return status;
993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
994 if (status)
995 return status;
1da177e4
LT		 996 DECODE_TAIL;
997}
998
b37ad28b 999static __be32
1da177e4
LT		 1000nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1001{
1002 DECODE_HEAD;
1003
1004 READ_BUF(4);
06553991 1005 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1006 if (putfh->pf_fhlen > NFS4_FHSIZE)
1007 goto xdr_error;
1008 READ_BUF(putfh->pf_fhlen);
1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1010
1011 DECODE_TAIL;
1012}
1013
e1a90ebd
AS		 1014static __be32
1015nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1016{
1017 if (argp->minorversion == 0)
1018 return nfs_ok;
1019 return nfserr_notsupp;
1020}
1021
b37ad28b 1022static __be32
1da177e4
LT		 1023nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1024{
1025 DECODE_HEAD;
1026
e31a1b66
BH		 1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1028 if (status)
1029 return status;
1030 READ_BUF(12);
542d1ab3 1031 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1032 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1033
1034 DECODE_TAIL;
1035}
1036
b37ad28b 1037static __be32
1da177e4
LT		 1038nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1039{
1040 DECODE_HEAD;
1041
1042 READ_BUF(24);
542d1ab3 1043 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1045 readdir->rd_dircount = be32_to_cpup(p++);
1046 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1048 goto out;
1049
1050 DECODE_TAIL;
1051}
1052
b37ad28b 1053static __be32
1da177e4
LT		 1054nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1055{
1056 DECODE_HEAD;
1057
1058 READ_BUF(4);
06553991 1059 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1060 READ_BUF(remove->rm_namelen);
1061 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1063 return status;
1064
1065 DECODE_TAIL;
1066}
1067
b37ad28b 1068static __be32
1da177e4
LT		 1069nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1070{
1071 DECODE_HEAD;
1072
1073 READ_BUF(4);
06553991 1074 rename->rn_snamelen = be32_to_cpup(p++);
1da177e4
LT		 1075 READ_BUF(rename->rn_snamelen + 4);
1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
06553991 1077 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1078 READ_BUF(rename->rn_tnamelen);
1079 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1080 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1081 return status;
a36b1725 1082 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1083 return status;
1084
1085 DECODE_TAIL;
1086}
1087
b37ad28b 1088static __be32
1da177e4
LT		 1089nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1090{
1091 DECODE_HEAD;
1092
e1a90ebd
AS		 1093 if (argp->minorversion >= 1)
1094 return nfserr_notsupp;
1095
1da177e4
LT		 1096 READ_BUF(sizeof(clientid_t));
1097 COPYMEM(clientid, sizeof(clientid_t));
1098
1099 DECODE_TAIL;
1100}
1101
dcb488a3
AA		 1102static __be32
1103nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1104 struct nfsd4_secinfo *secinfo)
1105{
1106 DECODE_HEAD;
1107
1108 READ_BUF(4);
06553991 1109 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1110 READ_BUF(secinfo->si_namelen);
1111 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1112 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1113 if (status)
1114 return status;
1115 DECODE_TAIL;
1116}
1117
04f4ad16
BF		 1118static __be32
1119nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1120 struct nfsd4_secinfo_no_name *sin)
1121{
1122 DECODE_HEAD;
1123
1124 READ_BUF(4);
06553991 1125 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1126 DECODE_TAIL;
1127}
1128
b37ad28b 1129static __be32
1da177e4
LT		 1130nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1131{
e31a1b66 1132 __be32 status;
1da177e4 1133
e31a1b66
BH		 1134 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1135 if (status)
1136 return status;
3c8e0316 1137 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1138 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1139}
1140
b37ad28b 1141static __be32
1da177e4
LT		 1142nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1143{
1144 DECODE_HEAD;
1145
e1a90ebd
AS		 1146 if (argp->minorversion >= 1)
1147 return nfserr_notsupp;
1148
ab4684d1
CL		 1149 READ_BUF(NFS4_VERIFIER_SIZE);
1150 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1151
a084daf5
BF		 1152 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1153 if (status)
1154 return nfserr_bad_xdr;
1155 READ_BUF(8);
06553991
BF		 1156 setclientid->se_callback_prog = be32_to_cpup(p++);
1157 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1da177e4
LT		 1158
1159 READ_BUF(setclientid->se_callback_netid_len + 4);
1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
06553991 1161 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4
LT		 1162
1163 READ_BUF(setclientid->se_callback_addr_len + 4);
1164 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
06553991 1165 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1166
1167 DECODE_TAIL;
1168}
1169
b37ad28b 1170static __be32
1da177e4
LT		 1171nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1172{
1173 DECODE_HEAD;
1174
e1a90ebd
AS		 1175 if (argp->minorversion >= 1)
1176 return nfserr_notsupp;
1177
ab4684d1 1178 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1179 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1180 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1181
1182 DECODE_TAIL;
1183}
1184
1185/* Also used for NVERIFY */
b37ad28b 1186static __be32
1da177e4
LT		 1187nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1188{
1da177e4
LT		 1189 DECODE_HEAD;
1190
1191 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1192 goto out;
1193
1194 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1195 * nfsd4_proc_verify */
1196
1da177e4 1197 READ_BUF(4);
06553991 1198 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1199 READ_BUF(verify->ve_attrlen);
1200 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1201
1202 DECODE_TAIL;
1203}
1204
b37ad28b 1205static __be32
1da177e4
LT		 1206nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1207{
1208 int avail;
1da177e4
LT		 1209 int len;
1210 DECODE_HEAD;
1211
e31a1b66
BH		 1212 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1213 if (status)
1214 return status;
1215 READ_BUF(16);
542d1ab3 1216 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1217 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1218 if (write->wr_stable_how > 2)
1219 goto xdr_error;
06553991 1220 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1221
1222 /* Sorry .. no magic macros for this.. *
1223 * READ_BUF(write->wr_buflen);
1224 * SAVEMEM(write->wr_buf, write->wr_buflen);
1225 */
1226 avail = (char*)argp->end - (char*)argp->p;
1227 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1228 dprintk("NFSD: xdr error (%s:%d)\n",
1229 __FILE__, __LINE__);
1da177e4
LT		 1230 goto xdr_error;
1231 }
70cc7f75
BF		 1232 write->wr_head.iov_base = p;
1233 write->wr_head.iov_len = avail;
70cc7f75 1234 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1235
1236 len = XDR_QUADLEN(write->wr_buflen) << 2;
1237 if (len >= avail) {
1238 int pages;
1239
1240 len -= avail;
1241
1242 pages = len >> PAGE_SHIFT;
1243 argp->pagelist += pages;
1244 argp->pagelen -= pages * PAGE_SIZE;
1245 len -= pages * PAGE_SIZE;
1246
1247 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1248 argp->pagelist++;
5a80a54d 1249 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1250 }
5a80a54d 1251 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1252
1253 DECODE_TAIL;
1254}
1255
b37ad28b 1256static __be32
1da177e4
LT		 1257nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1258{
1259 DECODE_HEAD;
1260
e1a90ebd
AS		 1261 if (argp->minorversion >= 1)
1262 return nfserr_notsupp;
1263
1da177e4
LT		 1264 READ_BUF(12);
1265 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1266 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1267 READ_BUF(rlockowner->rl_owner.len);
1268 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1269
60adfc50
AA		 1270 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1271 return nfserr_inval;
1da177e4
LT		 1272 DECODE_TAIL;
1273}
1274
2db134eb
AA		 1275static __be32
1276nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1277 struct nfsd4_exchange_id *exid)
2db134eb 1278{
5afa040b 1279 int dummy, tmp;
0733d213
AA		 1280 DECODE_HEAD;
1281
1282 READ_BUF(NFS4_VERIFIER_SIZE);
1283 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1284
a084daf5
BF		 1285 status = nfsd4_decode_opaque(argp, &exid->clname);
1286 if (status)
1287 return nfserr_bad_xdr;
0733d213
AA		 1288
1289 READ_BUF(4);
06553991 1290 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1291
1292 /* Ignore state_protect4_a */
1293 READ_BUF(4);
06553991 1294 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1295 switch (exid->spa_how) {
1296 case SP4_NONE:
1297 break;
1298 case SP4_MACH_CRED:
1299 /* spo_must_enforce */
1300 READ_BUF(4);
06553991 1301 dummy = be32_to_cpup(p++);
0733d213
AA		 1302 READ_BUF(dummy * 4);
1303 p += dummy;
1304
1305 /* spo_must_allow */
1306 READ_BUF(4);
06553991 1307 dummy = be32_to_cpup(p++);
0733d213
AA		 1308 READ_BUF(dummy * 4);
1309 p += dummy;
1310 break;
1311 case SP4_SSV:
1312 /* ssp_ops */
1313 READ_BUF(4);
06553991 1314 dummy = be32_to_cpup(p++);
0733d213
AA		 1315 READ_BUF(dummy * 4);
1316 p += dummy;
1317
1318 READ_BUF(4);
06553991 1319 dummy = be32_to_cpup(p++);
0733d213
AA		 1320 READ_BUF(dummy * 4);
1321 p += dummy;
1322
1323 /* ssp_hash_algs<> */
1324 READ_BUF(4);
06553991 1325 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1326 while (tmp--) {
1327 READ_BUF(4);
06553991 1328 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1329 READ_BUF(dummy);
1330 p += XDR_QUADLEN(dummy);
1331 }
0733d213
AA		 1332
1333 /* ssp_encr_algs<> */
1334 READ_BUF(4);
06553991 1335 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1336 while (tmp--) {
1337 READ_BUF(4);
06553991 1338 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1339 READ_BUF(dummy);
1340 p += XDR_QUADLEN(dummy);
1341 }
0733d213
AA		 1342
1343 /* ssp_window and ssp_num_gss_handles */
1344 READ_BUF(8);
06553991
BF		 1345 dummy = be32_to_cpup(p++);
1346 dummy = be32_to_cpup(p++);
0733d213
AA		 1347 break;
1348 default:
1349 goto xdr_error;
1350 }
1351
1352 /* Ignore Implementation ID */
1353 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1354 dummy = be32_to_cpup(p++);
0733d213
AA		 1355
1356 if (dummy > 1)
1357 goto xdr_error;
1358
1359 if (dummy == 1) {
1360 /* nii_domain */
1361 READ_BUF(4);
06553991 1362 dummy = be32_to_cpup(p++);
0733d213
AA		 1363 READ_BUF(dummy);
1364 p += XDR_QUADLEN(dummy);
1365
1366 /* nii_name */
1367 READ_BUF(4);
06553991 1368 dummy = be32_to_cpup(p++);
0733d213
AA		 1369 READ_BUF(dummy);
1370 p += XDR_QUADLEN(dummy);
1371
1372 /* nii_date */
1373 READ_BUF(12);
1374 p += 3;
1375 }
1376 DECODE_TAIL;
2db134eb
AA		 1377}
1378
1379static __be32
1380nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_create_session *sess)
1382{
ec6b5d7b 1383 DECODE_HEAD;
ec6b5d7b 1384 u32 dummy;
ec6b5d7b
AA		 1385
1386 READ_BUF(16);
1387 COPYMEM(&sess->clientid, 8);
06553991
BF		 1388 sess->seqid = be32_to_cpup(p++);
1389 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1390
1391 /* Fore channel attrs */
1392 READ_BUF(28);
06553991
BF		 1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1397 sess->fore_channel.maxops = be32_to_cpup(p++);
1398 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1400 if (sess->fore_channel.nr_rdma_attrs == 1) {
1401 READ_BUF(4);
06553991 1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1404 dprintk("Too many fore channel attr bitmaps!\n");
1405 goto xdr_error;
1406 }
1407
1408 /* Back channel attrs */
1409 READ_BUF(28);
06553991
BF		 1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1414 sess->back_channel.maxops = be32_to_cpup(p++);
1415 sess->back_channel.maxreqs = be32_to_cpup(p++);
1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1417 if (sess->back_channel.nr_rdma_attrs == 1) {
1418 READ_BUF(4);
06553991 1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1420 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1421 dprintk("Too many back channel attr bitmaps!\n");
1422 goto xdr_error;
1423 }
1424
acb2887e 1425 READ_BUF(4);
06553991 1426 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1428 DECODE_TAIL;
2db134eb
AA		 1429}
1430
1431static __be32
1432nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_destroy_session *destroy_session)
1434{
e10e0cfc
BH		 1435 DECODE_HEAD;
1436 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1438
1439 DECODE_TAIL;
2db134eb
AA		 1440}
1441
e1ca12df
BS		 1442static __be32
1443nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1444 struct nfsd4_free_stateid *free_stateid)
1445{
1446 DECODE_HEAD;
1447
1448 READ_BUF(sizeof(stateid_t));
06553991 1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1451
1452 DECODE_TAIL;
1453}
1454
2db134eb
AA		 1455static __be32
1456nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1457 struct nfsd4_sequence *seq)
1458{
b85d4c01
BH		 1459 DECODE_HEAD;
1460
1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1463 seq->seqid = be32_to_cpup(p++);
1464 seq->slotid = be32_to_cpup(p++);
1465 seq->maxslots = be32_to_cpup(p++);
1466 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1467
1468 DECODE_TAIL;
2db134eb
AA		 1469}
1470
17456804
BS		 1471static __be32
1472nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1473{
17456804 1474 int i;
03cfb420
BS		 1475 __be32 *p, status;
1476 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1477
1478 READ_BUF(4);
1479 test_stateid->ts_num_ids = ntohl(*p++);
1480
03cfb420 1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1482
1483 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1484 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1485 if (!stateid) {
afcf6792 1486 status = nfserrno(-ENOMEM);
03cfb420
BS		 1487 goto out;
1488 }
1489
1490 defer_free(argp, kfree, stateid);
1491 INIT_LIST_HEAD(&stateid->ts_id_list);
1492 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1493
1494 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1495 if (status)
03cfb420 1496 goto out;
17456804
BS		 1497 }
1498
1499 status = 0;
1500out:
1501 return status;
1502xdr_error:
1503 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1504 status = nfserr_bad_xdr;
1505 goto out;
1506}
1507
345c2842
MJ		 1508static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1509{
1510 DECODE_HEAD;
1511
1512 READ_BUF(8);
1513 COPYMEM(&dc->clientid, 8);
1514
1515 DECODE_TAIL;
1516}
1517
4dc6ec00
BF		 1518static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1519{
1520 DECODE_HEAD;
1521
1522 READ_BUF(4);
06553991 1523 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1524
1525 DECODE_TAIL;
1526}
1527
347e0ad9
BH		 1528static __be32
1529nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1530{
1531 return nfs_ok;
1532}
1533
3c375c6f
BH		 1534static __be32
1535nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1536{
1e685ec2 1537 return nfserr_notsupp;
3c375c6f
BH		 1538}
1539
347e0ad9
BH		 1540typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1541
1542static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1543 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1544 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1545 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1546 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1547 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1548 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1549 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1550 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1551 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1552 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1553 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1554 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1555 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1556 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1557 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1558 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1559 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1560 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1561 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1562 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1563 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1564 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1565 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1566 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1567 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1568 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1569 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1570 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1571 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1572 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1573 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1574 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1575 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1576 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1577 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1578 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1579 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1580
1581 /* new operations for NFSv4.1 */
cb73a9f4 1582 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1583 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1584 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1585 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1586 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1587 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1588 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1590 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1591 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1592 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1593 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1594 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1595 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1596 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1597 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1598 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1599 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1600 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1601};
1602
e1a90ebd
AS		 1603static inline bool
1604nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1605{
8217d146 1606 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1607 return false;
8217d146 1608 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1609 return false;
8217d146
AS		 1610 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1611 return false;
1612 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1613 return false;
1614 return true;
1615}
f2feb96b 1616
b37ad28b 1617static __be32
1da177e4
LT		 1618nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1619{
1620 DECODE_HEAD;
1621 struct nfsd4_op *op;
1091006c 1622 bool cachethis = false;
a5cddc88
BF		 1623 int auth_slack= argp->rqstp->rq_auth_slack;
1624 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1625 int readcount = 0;
1626 int readbytes = 0;
1da177e4
LT		 1627 int i;
1628
1da177e4 1629 READ_BUF(4);
06553991 1630 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1631 READ_BUF(argp->taglen + 8);
1632 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1633 argp->minorversion = be32_to_cpup(p++);
1634 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1635 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1636
1637 if (argp->taglen > NFSD4_MAX_TAGLEN)
1638 goto xdr_error;
1639 if (argp->opcnt > 100)
1640 goto xdr_error;
1641
e8c96f8c 1642 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1643 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1644 if (!argp->ops) {
1645 argp->ops = argp->iops;
817cb9d4 1646 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1647 goto xdr_error;
1648 }
1649 }
1650
e1a90ebd 1651 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1652 argp->opcnt = 0;
1653
1da177e4
LT		 1654 for (i = 0; i < argp->opcnt; i++) {
1655 op = &argp->ops[i];
1656 op->replay = NULL;
1657
8a61b18c 1658 READ_BUF(4);
06553991 1659 op->opnum = be32_to_cpup(p++);
1da177e4 1660
e1a90ebd
AS		 1661 if (nfsd4_opnum_in_range(argp, op))
1662 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1663 else {
1da177e4
LT		 1664 op->opnum = OP_ILLEGAL;
1665 op->status = nfserr_op_illegal;
1da177e4 1666 }
1091006c
BF		 1667 /*
1668 * We'll try to cache the result in the DRC if any one
1669 * op in the compound wants to be cached:
1670 */
1671 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1672
b0e35fda
BF		 1673 if (op->opnum == OP_READ) {
1674 readcount++;
1675 readbytes += nfsd4_max_reply(argp->rqstp, op);
1676 } else
1677 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1678
1679 if (op->status) {
1680 argp->opcnt = i+1;
1681 break;
1682 }
1da177e4 1683 }
1091006c
BF		 1684 /* Sessions make the DRC unnecessary: */
1685 if (argp->minorversion)
1686 cachethis = false;
b0e35fda 1687 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1688 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1689
a5cddc88 1690 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
b0e35fda
BF		 1691 argp->rqstp->rq_splice_ok = false;
1692
1da177e4
LT		 1693 DECODE_TAIL;
1694}
1da177e4 1695
d05d5744 1696static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1697{
1698 if (IS_I_VERSION(inode)) {
d05d5744 1699 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1700 } else {
d05d5744
BF		 1701 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1702 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1703 }
d05d5744 1704 return p;
c654b8a9
BF		 1705}
1706
d05d5744 1707static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1708{
d05d5744 1709 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1710 if (c->change_supported) {
d05d5744
BF		 1711 p = xdr_encode_hyper(p, c->before_change);
1712 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1713 } else {
d05d5744
BF		 1714 *p++ = cpu_to_be32(c->before_ctime_sec);
1715 *p++ = cpu_to_be32(c->before_ctime_nsec);
1716 *p++ = cpu_to_be32(c->after_ctime_sec);
1717 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1718 }
d05d5744 1719 return p;
c654b8a9 1720}
1da177e4 1721
81c3f413 1722/* Encode as an array of strings the string given with components
e7a0444a 1723 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1724 */
ddd1ea56
BF		 1725static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1726 char *components, char esc_enter,
1727 char esc_exit)
81c3f413 1728{
ddd1ea56 1729 __be32 *p;
082d4bd7
BF		 1730 __be32 pathlen;
1731 int pathlen_offset;
81c3f413 1732 int strlen, count=0;
e7a0444a 1733 char *str, *end, *next;
81c3f413
BF		 1734
1735 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1736
1737 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1738 p = xdr_reserve_space(xdr, 4);
1739 if (!p)
81c3f413 1740 return nfserr_resource;
082d4bd7
BF		 1741 p++; /* We will fill this in with @count later */
1742
81c3f413
BF		 1743 end = str = components;
1744 while (*end) {
e7a0444a
WAA		 1745 bool found_esc = false;
1746
1747 /* try to parse as esc_start, ..., esc_end, sep */
1748 if (*str == esc_enter) {
1749 for (; *end && (*end != esc_exit); end++)
1750 /* find esc_exit or end of string */;
1751 next = end + 1;
1752 if (*end && (!*next || *next == sep)) {
1753 str++;
1754 found_esc = true;
1755 }
1756 }
1757
1758 if (!found_esc)
1759 for (; *end && (*end != sep); end++)
1760 /* find sep or end of string */;
1761
81c3f413
BF		 1762 strlen = end - str;
1763 if (strlen) {
ddd1ea56
BF		 1764 p = xdr_reserve_space(xdr, strlen + 4);
1765 if (!p)
81c3f413 1766 return nfserr_resource;
0c0c267b 1767 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1768 count++;
1769 }
1770 else
1771 end++;
1772 str = end;
1773 }
082d4bd7
BF		 1774 pathlen = htonl(xdr->buf->len - pathlen_offset);
1775 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1776 return 0;
1777}
1778
e7a0444a
WAA		 1779/* Encode as an array of strings the string given with components
1780 * separated @sep.
1781 */
ddd1ea56
BF		 1782static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1783 char *components)
e7a0444a 1784{
ddd1ea56 1785 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1786}
1787
81c3f413
BF		 1788/*
1789 * encode a location element of a fs_locations structure
1790 */
ddd1ea56
BF		 1791static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1792 struct nfsd4_fs_location *location)
81c3f413 1793{
b37ad28b 1794 __be32 status;
81c3f413 1795
ddd1ea56 1796 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1797 '[', ']');
81c3f413
BF		 1798 if (status)
1799 return status;
ddd1ea56 1800 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1801 if (status)
1802 return status;
81c3f413
BF		 1803 return 0;
1804}
1805
1806/*
ed748aac 1807 * Encode a path in RFC3530 'pathname4' format
81c3f413 1808 */
ddd1ea56
BF		 1809static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1810 const struct path *root,
1811 const struct path *path)
81c3f413 1812{
301f0268 1813 struct path cur = *path;
ddd1ea56 1814 __be32 *p;
ed748aac
TM		 1815 struct dentry **components = NULL;
1816 unsigned int ncomponents = 0;
1817 __be32 err = nfserr_jukebox;
81c3f413 1818
ed748aac 1819 dprintk("nfsd4_encode_components(");
81c3f413 1820
ed748aac
TM		 1821 path_get(&cur);
1822 /* First walk the path up to the nfsd root, and store the
1823 * dentries/path components in an array.
1824 */
1825 for (;;) {
1826 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1827 break;
1828 if (cur.dentry == cur.mnt->mnt_root) {
1829 if (follow_up(&cur))
1830 continue;
1831 goto out_free;
1832 }
1833 if ((ncomponents & 15) == 0) {
1834 struct dentry **new;
1835 new = krealloc(components,
1836 sizeof(*new) * (ncomponents + 16),
1837 GFP_KERNEL);
1838 if (!new)
1839 goto out_free;
1840 components = new;
1841 }
1842 components[ncomponents++] = cur.dentry;
1843 cur.dentry = dget_parent(cur.dentry);
1844 }
ddd1ea56
BF		 1845 err = nfserr_resource;
1846 p = xdr_reserve_space(xdr, 4);
1847 if (!p)
ed748aac 1848 goto out_free;
c373b0a4 1849 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1850
1851 while (ncomponents) {
1852 struct dentry *dentry = components[ncomponents - 1];
301f0268 1853 unsigned int len;
ed748aac 1854
301f0268
AV		 1855 spin_lock(&dentry->d_lock);
1856 len = dentry->d_name.len;
ddd1ea56
BF		 1857 p = xdr_reserve_space(xdr, len + 4);
1858 if (!p) {
301f0268 1859 spin_unlock(&dentry->d_lock);
ed748aac 1860 goto out_free;
301f0268 1861 }
0c0c267b 1862 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1863 dprintk("/%s", dentry->d_name.name);
301f0268 1864 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1865 dput(dentry);
1866 ncomponents--;
81c3f413 1867 }
ed748aac 1868
ed748aac
TM		 1869 err = 0;
1870out_free:
1871 dprintk(")\n");
1872 while (ncomponents)
1873 dput(components[--ncomponents]);
1874 kfree(components);
1875 path_put(&cur);
1876 return err;
1877}
1878
ddd1ea56
BF		 1879static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1880 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1881{
1882 struct svc_export *exp_ps;
1883 __be32 res;
1884
1885 exp_ps = rqst_find_fsidzero_export(rqstp);
1886 if (IS_ERR(exp_ps))
1887 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1888 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1889 exp_put(exp_ps);
1890 return res;
81c3f413
BF		 1891}
1892
1893/*
1894 * encode a fs_locations structure
1895 */
ddd1ea56
BF		 1896static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1897 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1898{
b37ad28b 1899 __be32 status;
cc45f017 1900 int i;
ddd1ea56 1901 __be32 *p;
81c3f413 1902 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1903
ddd1ea56 1904 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1905 if (status)
1906 return status;
ddd1ea56
BF		 1907 p = xdr_reserve_space(xdr, 4);
1908 if (!p)
81c3f413 1909 return nfserr_resource;
c373b0a4 1910 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1911 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1912 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1913 if (status)
1914 return status;
1915 }
81c3f413
BF		 1916 return 0;
1917}
1da177e4 1918
3d2544b1
BF		 1919static u32 nfs4_file_type(umode_t mode)
1920{
1921 switch (mode & S_IFMT) {
1922 case S_IFIFO: return NF4FIFO;
1923 case S_IFCHR: return NF4CHR;
1924 case S_IFDIR: return NF4DIR;
1925 case S_IFBLK: return NF4BLK;
1926 case S_IFLNK: return NF4LNK;
1927 case S_IFREG: return NF4REG;
1928 case S_IFSOCK: return NF4SOCK;
1929 default: return NF4BAD;
1930 };
1931}
1da177e4 1932
b37ad28b 1933static inline __be32
ddd1ea56
BF		 1934nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1935 struct nfs4_ace *ace)
1da177e4 1936{
3554116d 1937 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1938 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1939 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1940 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1941 else
ddd1ea56 1942 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1943}
1944
42ca0993
BF		 1945#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1946 FATTR4_WORD0_RDATTR_ERROR)
1947#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1948
18032ca0
DQ		 1949#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1950static inline __be32
ddd1ea56
BF		 1951nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1952 void *context, int len)
18032ca0 1953{
ddd1ea56 1954 __be32 *p;
18032ca0 1955
ddd1ea56
BF		 1956 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1957 if (!p)
18032ca0
DQ		 1958 return nfserr_resource;
1959
1960 /*
1961 * For now we use a 0 here to indicate the null translation; in
1962 * the future we may place a call to translation code here.
1963 */
c373b0a4
BF		 1964 *p++ = cpu_to_be32(0); /* lfs */
1965 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1966 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1967 return 0;
1968}
1969#else
1970static inline __be32
ddd1ea56
BF		 1971nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1972 void *context, int len)
18032ca0
DQ		 1973{ return 0; }
1974#endif
1975
b37ad28b 1976static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1977{
1978 /* As per referral draft: */
1979 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1980 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1981 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1982 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1983 *rdattr_err = NFSERR_MOVED;
1984 else
1985 return nfserr_moved;
1986 }
1987 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1988 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1989 return 0;
1990}
1da177e4 1991
ae7095a7
BF		 1992
1993static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1994{
1995 struct path path = exp->ex_path;
1996 int err;
1997
1998 path_get(&path);
1999 while (follow_up(&path)) {
2000 if (path.dentry != path.mnt->mnt_root)
2001 break;
2002 }
3dadecce 2003 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2004 path_put(&path);
2005 return err;
2006}
2007
1da177e4
LT		 2008/*
2009 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2010 * ourselves.
1da177e4 2011 */
da2ebce6 2012static __be32
d5184658
BF		 2013nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2014 struct svc_export *exp,
2015 struct dentry *dentry, u32 *bmval,
406a7ea9 2016 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2017{
2018 u32 bmval0 = bmval[0];
2019 u32 bmval1 = bmval[1];
7e705706 2020 u32 bmval2 = bmval[2];
1da177e4 2021 struct kstat stat;
d50e6136 2022 struct svc_fh *tempfh = NULL;
1da177e4 2023 struct kstatfs statfs;
ddd1ea56 2024 __be32 *p;
1fcea5b2 2025 int starting_len = xdr->buf->len;
082d4bd7
BF		 2026 int attrlen_offset;
2027 __be32 attrlen;
1da177e4
LT		 2028 u32 dummy;
2029 u64 dummy64;
42ca0993 2030 u32 rdattr_err = 0;
b37ad28b 2031 __be32 status;
b8dd7b9a 2032 int err;
1da177e4
LT		 2033 int aclsupport = 0;
2034 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2035 void *context = NULL;
2036 int contextlen;
2037 bool contextsupport = false;
7e705706
AA		 2038 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2039 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2040 struct path path = {
2041 .mnt = exp->ex_path.mnt,
2042 .dentry = dentry,
2043 };
3d733711 2044 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2045
2046 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2047 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2048 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2049 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2050
42ca0993 2051 if (exp->ex_fslocs.migrated) {
7e705706 2052 BUG_ON(bmval[2]);
42ca0993
BF		 2053 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2054 if (status)
2055 goto out;
2056 }
2057
3dadecce 2058 err = vfs_getattr(&path, &stat);
b8dd7b9a 2059 if (err)
1da177e4 2060 goto out_nfserr;
12337901
CH		 2061 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2062 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2063 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2064 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2065 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2066 if (err)
1da177e4
LT		 2067 goto out_nfserr;
2068 }
2069 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2070 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2071 status = nfserr_jukebox;
2072 if (!tempfh)
2073 goto out;
2074 fh_init(tempfh, NFS4_FHSIZE);
2075 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2076 if (status)
2077 goto out;
d50e6136 2078 fhp = tempfh;
1da177e4
LT		 2079 }
2080 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2081 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2082 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2083 aclsupport = (err == 0);
1da177e4 2084 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2085 if (err == -EOPNOTSUPP)
1da177e4 2086 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2087 else if (err == -EINVAL) {
1da177e4
LT		 2088 status = nfserr_attrnotsupp;
2089 goto out;
b8dd7b9a 2090 } else if (err != 0)
1da177e4
LT		 2091 goto out_nfserr;
2092 }
2093 }
1da177e4 2094
18032ca0
DQ		 2095#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2096 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2097 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2098 err = security_inode_getsecctx(dentry->d_inode,
2099 &context, &contextlen);
2100 contextsupport = (err == 0);
2101 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2102 if (err == -EOPNOTSUPP)
2103 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2104 else if (err)
2105 goto out_nfserr;
2106 }
2107 }
2108#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2109
2b44f1ba 2110 if (bmval2) {
ddd1ea56
BF		 2111 p = xdr_reserve_space(xdr, 16);
2112 if (!p)
2b44f1ba 2113 goto out_resource;
c373b0a4
BF		 2114 *p++ = cpu_to_be32(3);
2115 *p++ = cpu_to_be32(bmval0);
2116 *p++ = cpu_to_be32(bmval1);
2117 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2118 } else if (bmval1) {
ddd1ea56
BF		 2119 p = xdr_reserve_space(xdr, 12);
2120 if (!p)
2b44f1ba 2121 goto out_resource;
c373b0a4
BF		 2122 *p++ = cpu_to_be32(2);
2123 *p++ = cpu_to_be32(bmval0);
2124 *p++ = cpu_to_be32(bmval1);
7e705706 2125 } else {
ddd1ea56
BF		 2126 p = xdr_reserve_space(xdr, 8);
2127 if (!p)
2b44f1ba 2128 goto out_resource;
c373b0a4
BF		 2129 *p++ = cpu_to_be32(1);
2130 *p++ = cpu_to_be32(bmval0);
7e705706 2131 }
082d4bd7
BF		 2132
2133 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2134 p = xdr_reserve_space(xdr, 4);
2135 if (!p)
2136 goto out_resource;
082d4bd7 2137 p++; /* to be backfilled later */
1da177e4
LT		 2138
2139 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2140 u32 word0 = nfsd_suppattrs0(minorversion);
2141 u32 word1 = nfsd_suppattrs1(minorversion);
2142 u32 word2 = nfsd_suppattrs2(minorversion);
2143
42ca0993
BF		 2144 if (!aclsupport)
2145 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2146 if (!contextsupport)
2147 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2148 if (!word2) {
ddd1ea56
BF		 2149 p = xdr_reserve_space(xdr, 12);
2150 if (!p)
2b44f1ba 2151 goto out_resource;
c373b0a4
BF		 2152 *p++ = cpu_to_be32(2);
2153 *p++ = cpu_to_be32(word0);
2154 *p++ = cpu_to_be32(word1);
7e705706 2155 } else {
ddd1ea56
BF		 2156 p = xdr_reserve_space(xdr, 16);
2157 if (!p)
2b44f1ba 2158 goto out_resource;
c373b0a4
BF		 2159 *p++ = cpu_to_be32(3);
2160 *p++ = cpu_to_be32(word0);
2161 *p++ = cpu_to_be32(word1);
2162 *p++ = cpu_to_be32(word2);
7e705706 2163 }
1da177e4
LT		 2164 }
2165 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2166 p = xdr_reserve_space(xdr, 4);
2167 if (!p)
1da177e4 2168 goto out_resource;
3d2544b1 2169 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2170 if (dummy == NF4BAD) {
2171 status = nfserr_serverfault;
2172 goto out;
2173 }
c373b0a4 2174 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2175 }
2176 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2177 p = xdr_reserve_space(xdr, 4);
2178 if (!p)
1da177e4 2179 goto out_resource;
49640001 2180 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2181 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2182 else
c373b0a4
BF		 2183 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2184 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2185 }
2186 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2187 p = xdr_reserve_space(xdr, 8);
2188 if (!p)
1da177e4 2189 goto out_resource;
d05d5744 2190 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2191 }
2192 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2193 p = xdr_reserve_space(xdr, 8);
2194 if (!p)
1da177e4 2195 goto out_resource;
b64c7f3b 2196 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2197 }
2198 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2199 p = xdr_reserve_space(xdr, 4);
2200 if (!p)
1da177e4 2201 goto out_resource;
c373b0a4 2202 *p++ = cpu_to_be32(1);
1da177e4
LT		 2203 }
2204 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2205 p = xdr_reserve_space(xdr, 4);
2206 if (!p)
1da177e4 2207 goto out_resource;
c373b0a4 2208 *p++ = cpu_to_be32(1);
1da177e4
LT		 2209 }
2210 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2211 p = xdr_reserve_space(xdr, 4);
2212 if (!p)
1da177e4 2213 goto out_resource;
c373b0a4 2214 *p++ = cpu_to_be32(0);
1da177e4
LT		 2215 }
2216 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2217 p = xdr_reserve_space(xdr, 16);
2218 if (!p)
1da177e4 2219 goto out_resource;
42ca0993 2220 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2221 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2222 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2223 } else switch(fsid_source(fhp)) {
2224 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2225 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2226 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2227 break;
2228 case FSIDSOURCE_DEV:
c373b0a4
BF		 2229 *p++ = cpu_to_be32(0);
2230 *p++ = cpu_to_be32(MAJOR(stat.dev));
2231 *p++ = cpu_to_be32(0);
2232 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2233 break;
2234 case FSIDSOURCE_UUID:
94eb3689
KM		 2235 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2236 EX_UUID_LEN);
af6a4e28 2237 break;
1da177e4
LT		 2238 }
2239 }
2240 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2241 p = xdr_reserve_space(xdr, 4);
2242 if (!p)
1da177e4 2243 goto out_resource;
c373b0a4 2244 *p++ = cpu_to_be32(0);
1da177e4
LT		 2245 }
2246 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2247 p = xdr_reserve_space(xdr, 4);
2248 if (!p)
1da177e4 2249 goto out_resource;
c373b0a4 2250 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2251 }
2252 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2253 p = xdr_reserve_space(xdr, 4);
2254 if (!p)
1da177e4 2255 goto out_resource;
c373b0a4 2256 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2257 }
2258 if (bmval0 & FATTR4_WORD0_ACL) {
2259 struct nfs4_ace *ace;
1da177e4
LT		 2260
2261 if (acl == NULL) {
ddd1ea56
BF		 2262 p = xdr_reserve_space(xdr, 4);
2263 if (!p)
1da177e4
LT		 2264 goto out_resource;
2265
c373b0a4 2266 *p++ = cpu_to_be32(0);
1da177e4
LT		 2267 goto out_acl;
2268 }
ddd1ea56
BF		 2269 p = xdr_reserve_space(xdr, 4);
2270 if (!p)
1da177e4 2271 goto out_resource;
c373b0a4 2272 *p++ = cpu_to_be32(acl->naces);
1da177e4 2273
28e05dd8 2274 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2275 p = xdr_reserve_space(xdr, 4*3);
2276 if (!p)
1da177e4 2277 goto out_resource;
c373b0a4
BF		 2278 *p++ = cpu_to_be32(ace->type);
2279 *p++ = cpu_to_be32(ace->flag);
2280 *p++ = cpu_to_be32(ace->access_mask &
2281 NFS4_ACE_MASK_ALL);
ddd1ea56 2282 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2283 if (status)
2284 goto out;
2285 }
2286 }
2287out_acl:
2288 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2289 p = xdr_reserve_space(xdr, 4);
2290 if (!p)
1da177e4 2291 goto out_resource;
c373b0a4 2292 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2293 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2294 }
2295 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2296 p = xdr_reserve_space(xdr, 4);
2297 if (!p)
1da177e4 2298 goto out_resource;
c373b0a4 2299 *p++ = cpu_to_be32(1);
1da177e4
LT		 2300 }
2301 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2302 p = xdr_reserve_space(xdr, 4);
2303 if (!p)
1da177e4 2304 goto out_resource;
c373b0a4 2305 *p++ = cpu_to_be32(0);
1da177e4
LT		 2306 }
2307 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2308 p = xdr_reserve_space(xdr, 4);
2309 if (!p)
1da177e4 2310 goto out_resource;
c373b0a4 2311 *p++ = cpu_to_be32(1);
1da177e4
LT		 2312 }
2313 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2314 p = xdr_reserve_space(xdr, 4);
2315 if (!p)
1da177e4 2316 goto out_resource;
c373b0a4 2317 *p++ = cpu_to_be32(1);
1da177e4
LT		 2318 }
2319 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2320 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2321 if (!p)
1da177e4 2322 goto out_resource;
0c0c267b
BF		 2323 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2324 fhp->fh_handle.fh_size);
1da177e4
LT		 2325 }
2326 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2327 p = xdr_reserve_space(xdr, 8);
2328 if (!p)
1da177e4 2329 goto out_resource;
b64c7f3b 2330 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2331 }
2332 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2333 p = xdr_reserve_space(xdr, 8);
2334 if (!p)
1da177e4 2335 goto out_resource;
b64c7f3b 2336 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2337 }
2338 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2339 p = xdr_reserve_space(xdr, 8);
2340 if (!p)
1da177e4 2341 goto out_resource;
b64c7f3b 2342 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2343 }
2344 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2345 p = xdr_reserve_space(xdr, 8);
2346 if (!p)
1da177e4 2347 goto out_resource;
b64c7f3b 2348 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2349 }
81c3f413 2350 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2351 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2352 if (status)
2353 goto out;
2354 }
1da177e4 2355 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2356 p = xdr_reserve_space(xdr, 4);
2357 if (!p)
1da177e4 2358 goto out_resource;
c373b0a4 2359 *p++ = cpu_to_be32(1);
1da177e4
LT		 2360 }
2361 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2362 p = xdr_reserve_space(xdr, 8);
2363 if (!p)
1da177e4 2364 goto out_resource;
b64c7f3b 2365 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2366 }
2367 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2368 p = xdr_reserve_space(xdr, 4);
2369 if (!p)
1da177e4 2370 goto out_resource;
c373b0a4 2371 *p++ = cpu_to_be32(255);
1da177e4
LT		 2372 }
2373 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2374 p = xdr_reserve_space(xdr, 4);
2375 if (!p)
1da177e4 2376 goto out_resource;
c373b0a4 2377 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2378 }
2379 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2380 p = xdr_reserve_space(xdr, 8);
2381 if (!p)
1da177e4 2382 goto out_resource;
b64c7f3b 2383 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2384 }
2385 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2386 p = xdr_reserve_space(xdr, 8);
2387 if (!p)
1da177e4 2388 goto out_resource;
b64c7f3b 2389 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2390 }
2391 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2392 p = xdr_reserve_space(xdr, 4);
2393 if (!p)
1da177e4 2394 goto out_resource;
c373b0a4 2395 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2396 }
2397 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2398 p = xdr_reserve_space(xdr, 4);
2399 if (!p)
1da177e4 2400 goto out_resource;
c373b0a4 2401 *p++ = cpu_to_be32(1);
1da177e4
LT		 2402 }
2403 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2404 p = xdr_reserve_space(xdr, 4);
2405 if (!p)
1da177e4 2406 goto out_resource;
c373b0a4 2407 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2408 }
2409 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2410 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2411 if (status)
2412 goto out;
2413 }
2414 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2415 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2416 if (status)
2417 goto out;
2418 }
2419 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2420 p = xdr_reserve_space(xdr, 8);
2421 if (!p)
1da177e4 2422 goto out_resource;
c373b0a4
BF		 2423 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2424 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2425 }
2426 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2427 p = xdr_reserve_space(xdr, 8);
2428 if (!p)
1da177e4
LT		 2429 goto out_resource;
2430 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2431 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2432 }
2433 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2434 p = xdr_reserve_space(xdr, 8);
2435 if (!p)
1da177e4
LT		 2436 goto out_resource;
2437 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2438 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2439 }
2440 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2441 p = xdr_reserve_space(xdr, 8);
2442 if (!p)
1da177e4
LT		 2443 goto out_resource;
2444 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2445 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2446 }
2447 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2448 p = xdr_reserve_space(xdr, 8);
2449 if (!p)
1da177e4
LT		 2450 goto out_resource;
2451 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2452 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2453 }
2454 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2455 p = xdr_reserve_space(xdr, 12);
2456 if (!p)
1da177e4 2457 goto out_resource;
b64c7f3b 2458 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2459 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2460 }
2461 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2462 p = xdr_reserve_space(xdr, 12);
2463 if (!p)
1da177e4 2464 goto out_resource;
c373b0a4
BF		 2465 *p++ = cpu_to_be32(0);
2466 *p++ = cpu_to_be32(1);
2467 *p++ = cpu_to_be32(0);
1da177e4
LT		 2468 }
2469 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2470 p = xdr_reserve_space(xdr, 12);
2471 if (!p)
1da177e4 2472 goto out_resource;
b64c7f3b 2473 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2474 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2475 }
2476 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2477 p = xdr_reserve_space(xdr, 12);
2478 if (!p)
1da177e4 2479 goto out_resource;
b64c7f3b 2480 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2481 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2482 }
2483 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2484 p = xdr_reserve_space(xdr, 8);
2485 if (!p)
1da177e4 2486 goto out_resource;
406a7ea9
FF		 2487 /*
2488 * Get parent's attributes if not ignoring crossmount
2489 * and this is the root of a cross-mounted filesystem.
2490 */
2491 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2492 dentry == exp->ex_path.mnt->mnt_root)
2493 get_parent_attributes(exp, &stat);
b64c7f3b 2494 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2495 }
18032ca0 2496 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2497 status = nfsd4_encode_security_label(xdr, rqstp, context,
2498 contextlen);
18032ca0
DQ		 2499 if (status)
2500 goto out;
2501 }
8c18f205 2502 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2503 p = xdr_reserve_space(xdr, 16);
2504 if (!p)
de3997a7 2505 goto out_resource;
c373b0a4
BF		 2506 *p++ = cpu_to_be32(3);
2507 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2508 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2509 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2510 }
7e705706 2511
082d4bd7
BF		 2512 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2513 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2514 status = nfs_ok;
2515
2516out:
ba4e55bb 2517#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2518 if (context)
2519 security_release_secctx(context, contextlen);
ba4e55bb 2520#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2521 kfree(acl);
18df11d0 2522 if (tempfh) {
d50e6136 2523 fh_put(tempfh);
18df11d0
YZ		 2524 kfree(tempfh);
2525 }
1fcea5b2
BF		 2526 if (status)
2527 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2528 return status;
2529out_nfserr:
b8dd7b9a 2530 status = nfserrno(err);
1da177e4
LT		 2531 goto out;
2532out_resource:
1da177e4
LT		 2533 status = nfserr_resource;
2534 goto out;
1da177e4
LT		 2535}
2536
2825a7f9
BF		 2537static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2538 struct xdr_buf *buf, __be32 *p, int bytes)
2539{
2540 xdr->scratch.iov_len = 0;
2541 memset(buf, 0, sizeof(struct xdr_buf));
2542 buf->head[0].iov_base = p;
2543 buf->head[0].iov_len = 0;
2544 buf->len = 0;
2545 xdr->buf = buf;
2546 xdr->iov = buf->head;
2547 xdr->p = p;
2548 xdr->end = (void *)p + bytes;
2549 buf->buflen = bytes;
2550}
2551
d5184658
BF		 2552__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2553 struct svc_fh *fhp, struct svc_export *exp,
2554 struct dentry *dentry, u32 *bmval,
2555 struct svc_rqst *rqstp, int ignore_crossmnt)
2556{
2825a7f9 2557 struct xdr_buf dummy;
d5184658
BF		 2558 struct xdr_stream xdr;
2559 __be32 ret;
2560
2825a7f9 2561 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2562 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2563 ignore_crossmnt);
2564 *p = xdr.p;
2565 return ret;
2566}
2567
c0ce6ec8
BF		 2568static inline int attributes_need_mount(u32 *bmval)
2569{
2570 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2571 return 1;
2572 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2573 return 1;
2574 return 0;
2575}
2576
b37ad28b 2577static __be32
561f0ed4
BF		 2578nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2579 const char *name, int namlen)
1da177e4
LT		 2580{
2581 struct svc_export *exp = cd->rd_fhp->fh_export;
2582 struct dentry *dentry;
b37ad28b 2583 __be32 nfserr;
406a7ea9 2584 int ignore_crossmnt = 0;
1da177e4
LT		 2585
2586 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2587 if (IS_ERR(dentry))
2588 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2589 if (!dentry->d_inode) {
2590 /*
2591 * nfsd_buffered_readdir drops the i_mutex between
2592 * readdir and calling this callback, leaving a window
2593 * where this directory entry could have gone away.
2594 */
2595 dput(dentry);
2596 return nfserr_noent;
2597 }
1da177e4
LT		 2598
2599 exp_get(exp);
406a7ea9
FF		 2600 /*
2601 * In the case of a mountpoint, the client may be asking for
2602 * attributes that are only properties of the underlying filesystem
2603 * as opposed to the cross-mounted file system. In such a case,
2604 * we will not follow the cross mount and will fill the attribtutes
2605 * directly from the mountpoint dentry.
2606 */
3227fa41 2607 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2608 int err;
2609
3227fa41
BF		 2610 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2611 && !attributes_need_mount(cd->rd_bmval)) {
2612 ignore_crossmnt = 1;
2613 goto out_encode;
2614 }
dcb488a3
AA		 2615 /*
2616 * Why the heck aren't we just using nfsd_lookup??
2617 * Different "."/".." handling? Something else?
2618 * At least, add a comment here to explain....
2619 */
021d3a72
BF		 2620 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2621 if (err) {
2622 nfserr = nfserrno(err);
1da177e4
LT		 2623 goto out_put;
2624 }
dcb488a3
AA		 2625 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2626 if (nfserr)
2627 goto out_put;
1da177e4
LT		 2628
2629 }
3227fa41 2630out_encode:
561f0ed4 2631 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2632 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2633out_put:
2634 dput(dentry);
2635 exp_put(exp);
2636 return nfserr;
2637}
2638
2ebbc012 2639static __be32 *
561f0ed4 2640nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2641{
561f0ed4
BF		 2642 __be32 *p;
2643
2644 p = xdr_reserve_space(xdr, 6);
2645 if (!p)
1da177e4
LT		 2646 return NULL;
2647 *p++ = htonl(2);
2648 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2649 *p++ = htonl(0); /* bmval1 */
2650
87915c64 2651 *p++ = htonl(4); /* attribute length */
1da177e4 2652 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2653 return p;
2654}
2655
2656static int
a0ad13ef
N		 2657nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2658 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2659{
a0ad13ef 2660 struct readdir_cd *ccd = ccdv;
1da177e4 2661 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2662 struct xdr_stream *xdr = cd->xdr;
2663 int start_offset = xdr->buf->len;
2664 int cookie_offset;
2665 int entry_bytes;
b37ad28b 2666 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2667 __be64 wire_offset;
2668 __be32 *p;
1da177e4
LT		 2669
2670 /* In nfsv4, "." and ".." never make it onto the wire.. */
2671 if (name && isdotent(name, namlen)) {
2672 cd->common.err = nfs_ok;
2673 return 0;
2674 }
2675
561f0ed4
BF		 2676 if (cd->cookie_offset) {
2677 wire_offset = cpu_to_be64(offset);
2678 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2679 &wire_offset, 8);
2680 }
1da177e4 2681
561f0ed4
BF		 2682 p = xdr_reserve_space(xdr, 4);
2683 if (!p)
1da177e4 2684 goto fail;
1da177e4 2685 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2686 cookie_offset = xdr->buf->len;
2687 p = xdr_reserve_space(xdr, 3*4 + namlen);
2688 if (!p)
2689 goto fail;
1da177e4
LT		 2690 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2691 p = xdr_encode_array(p, name, namlen); /* name length & name */
2692
561f0ed4 2693 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2694 switch (nfserr) {
2695 case nfs_ok:
1da177e4
LT		 2696 break;
2697 case nfserr_resource:
2698 nfserr = nfserr_toosmall;
2699 goto fail;
b2c0cea6 2700 case nfserr_noent:
f41c5ad2 2701 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2702 goto skip_entry;
1da177e4
LT		 2703 default:
2704 /*
2705 * If the client requested the RDATTR_ERROR attribute,
2706 * we stuff the error code into this attribute
2707 * and continue. If this attribute was not requested,
2708 * then in accordance with the spec, we fail the
2709 * entire READDIR operation(!)
2710 */
2711 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2712 goto fail;
561f0ed4 2713 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2714 if (p == NULL) {
2715 nfserr = nfserr_toosmall;
1da177e4 2716 goto fail;
34081efc 2717 }
1da177e4 2718 }
561f0ed4
BF		 2719 nfserr = nfserr_toosmall;
2720 entry_bytes = xdr->buf->len - start_offset;
2721 if (entry_bytes > cd->rd_maxcount)
2722 goto fail;
2723 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2724 if (!cd->rd_dircount)
2725 goto fail;
2726 cd->rd_dircount--;
561f0ed4 2727 cd->cookie_offset = cookie_offset;
b2c0cea6 2728skip_entry:
1da177e4
LT		 2729 cd->common.err = nfs_ok;
2730 return 0;
2731fail:
561f0ed4 2732 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2733 cd->common.err = nfserr;
2734 return -EINVAL;
2735}
2736
d0a381dd
BF		 2737static __be32
2738nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2739{
bc749ca4 2740 __be32 *p;
e2f282b9 2741
d0a381dd
BF		 2742 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2743 if (!p)
2744 return nfserr_resource;
c373b0a4 2745 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2746 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2747 sizeof(stateid_opaque_t));
d0a381dd 2748 return 0;
e2f282b9
BH		 2749}
2750
695e12f8 2751static __be32
b37ad28b 2752nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2753{
d0a381dd 2754 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2755 __be32 *p;
1da177e4
LT		 2756
2757 if (!nfserr) {
d0a381dd
BF		 2758 p = xdr_reserve_space(xdr, 8);
2759 if (!p)
2760 return nfserr_resource;
c373b0a4
BF		 2761 *p++ = cpu_to_be32(access->ac_supported);
2762 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2763 }
695e12f8 2764 return nfserr;
1da177e4
LT		 2765}
2766
1d1bc8f2
BF		 2767static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2768{
d0a381dd 2769 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2770 __be32 *p;
2771
2772 if (!nfserr) {
d0a381dd
BF		 2773 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2774 if (!p)
2775 return nfserr_resource;
0c0c267b
BF		 2776 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2777 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2778 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2779 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2780 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2781 }
2782 return nfserr;
2783}
2784
695e12f8 2785static __be32
b37ad28b 2786nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2787{
d0a381dd
BF		 2788 struct xdr_stream *xdr = &resp->xdr;
2789
e2f282b9 2790 if (!nfserr)
d0a381dd 2791 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2792
695e12f8 2793 return nfserr;
1da177e4
LT		 2794}
2795
2796
695e12f8 2797static __be32
b37ad28b 2798nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2799{
d0a381dd 2800 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2801 __be32 *p;
1da177e4
LT		 2802
2803 if (!nfserr) {
d0a381dd
BF		 2804 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2805 if (!p)
2806 return nfserr_resource;
0c0c267b
BF		 2807 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2808 NFS4_VERIFIER_SIZE);
1da177e4 2809 }
695e12f8 2810 return nfserr;
1da177e4
LT		 2811}
2812
695e12f8 2813static __be32
b37ad28b 2814nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2815{
d0a381dd 2816 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2817 __be32 *p;
1da177e4
LT		 2818
2819 if (!nfserr) {
d0a381dd
BF		 2820 p = xdr_reserve_space(xdr, 32);
2821 if (!p)
2822 return nfserr_resource;
d05d5744 2823 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2824 *p++ = cpu_to_be32(2);
2825 *p++ = cpu_to_be32(create->cr_bmval[0]);
2826 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2827 }
695e12f8 2828 return nfserr;
1da177e4
LT		 2829}
2830
b37ad28b
AV		 2831static __be32
2832nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2833{
2834 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2835 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2836
2837 if (nfserr)
2838 return nfserr;
2839
d5184658
BF		 2840 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2841 getattr->ga_bmval,
406a7ea9 2842 resp->rqstp, 0);
1da177e4
LT		 2843 return nfserr;
2844}
2845
695e12f8
BH		 2846static __be32
2847nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2848{
d0a381dd 2849 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2850 struct svc_fh *fhp = *fhpp;
1da177e4 2851 unsigned int len;
bc749ca4 2852 __be32 *p;
1da177e4
LT		 2853
2854 if (!nfserr) {
2855 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2856 p = xdr_reserve_space(xdr, len + 4);
2857 if (!p)
2858 return nfserr_resource;
0c0c267b 2859 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2860 }
695e12f8 2861 return nfserr;
1da177e4
LT		 2862}
2863
2864/*
2865* Including all fields other than the name, a LOCK4denied structure requires
2866* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2867*/
d0a381dd
BF		 2868static __be32
2869nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2870{
7c13f344 2871 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2872 __be32 *p;
1da177e4 2873
8c7424cf 2874again:
d0a381dd 2875 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2876 if (!p) {
2877 /*
2878 * Don't fail to return the result just because we can't
2879 * return the conflicting open:
2880 */
2881 if (conf->len) {
2882 conf->len = 0;
2883 conf->data = NULL;
2884 goto again;
2885 }
d0a381dd 2886 return nfserr_resource;
8c7424cf 2887 }
b64c7f3b
BF		 2888 p = xdr_encode_hyper(p, ld->ld_start);
2889 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2890 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2891 if (conf->len) {
0c0c267b
BF		 2892 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2893 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2894 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2895 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2896 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2897 }
d0a381dd 2898 return nfserr_denied;
1da177e4
LT		 2899}
2900
695e12f8 2901static __be32
b37ad28b 2902nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2903{
d0a381dd
BF		 2904 struct xdr_stream *xdr = &resp->xdr;
2905
e2f282b9 2906 if (!nfserr)
d0a381dd 2907 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2908 else if (nfserr == nfserr_denied)
d0a381dd 2909 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2910 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2911 return nfserr;
1da177e4
LT		 2912}
2913
695e12f8 2914static __be32
b37ad28b 2915nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2916{
d0a381dd
BF		 2917 struct xdr_stream *xdr = &resp->xdr;
2918
1da177e4 2919 if (nfserr == nfserr_denied)
d0a381dd 2920 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2921 return nfserr;
1da177e4
LT		 2922}
2923
695e12f8 2924static __be32
b37ad28b 2925nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2926{
d0a381dd
BF		 2927 struct xdr_stream *xdr = &resp->xdr;
2928
e2f282b9 2929 if (!nfserr)
d0a381dd 2930 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2931
695e12f8 2932 return nfserr;
1da177e4
LT		 2933}
2934
2935
695e12f8 2936static __be32
b37ad28b 2937nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2938{
d0a381dd 2939 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2940 __be32 *p;
1da177e4
LT		 2941
2942 if (!nfserr) {
d0a381dd
BF		 2943 p = xdr_reserve_space(xdr, 20);
2944 if (!p)
2945 return nfserr_resource;
d05d5744 2946 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2947 }
695e12f8 2948 return nfserr;
1da177e4
LT		 2949}
2950
2951
695e12f8 2952static __be32
b37ad28b 2953nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2954{
d0a381dd 2955 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2956 __be32 *p;
1da177e4
LT		 2957
2958 if (nfserr)
2959 goto out;
2960
d0a381dd
BF		 2961 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2962 if (nfserr)
2963 goto out;
2964 p = xdr_reserve_space(xdr, 40);
2965 if (!p)
2966 return nfserr_resource;
d05d5744 2967 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2968 *p++ = cpu_to_be32(open->op_rflags);
2969 *p++ = cpu_to_be32(2);
2970 *p++ = cpu_to_be32(open->op_bmval[0]);
2971 *p++ = cpu_to_be32(open->op_bmval[1]);
2972 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2973
2974 switch (open->op_delegate_type) {
2975 case NFS4_OPEN_DELEGATE_NONE:
2976 break;
2977 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2978 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2979 if (nfserr)
2980 return nfserr;
2981 p = xdr_reserve_space(xdr, 20);
2982 if (!p)
2983 return nfserr_resource;
c373b0a4 2984 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2985
2986 /*
2987 * TODO: ACE's in delegations
2988 */
c373b0a4
BF		 2989 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2990 *p++ = cpu_to_be32(0);
2991 *p++ = cpu_to_be32(0);
2992 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2993 break;
2994 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2995 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2996 if (nfserr)
2997 return nfserr;
2998 p = xdr_reserve_space(xdr, 32);
2999 if (!p)
3000 return nfserr_resource;
c373b0a4 3001 *p++ = cpu_to_be32(0);
1da177e4
LT		 3002
3003 /*
3004 * TODO: space_limit's in delegations
3005 */
c373b0a4
BF		 3006 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3007 *p++ = cpu_to_be32(~(u32)0);
3008 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3009
3010 /*
3011 * TODO: ACE's in delegations
3012 */
c373b0a4
BF		 3013 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3014 *p++ = cpu_to_be32(0);
3015 *p++ = cpu_to_be32(0);
3016 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3017 break;
d24433cd
BH		 3018 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3019 switch (open->op_why_no_deleg) {
3020 case WND4_CONTENTION:
3021 case WND4_RESOURCE:
d0a381dd
BF		 3022 p = xdr_reserve_space(xdr, 8);
3023 if (!p)
3024 return nfserr_resource;
c373b0a4
BF		 3025 *p++ = cpu_to_be32(open->op_why_no_deleg);
3026 /* deleg signaling not supported yet: */
3027 *p++ = cpu_to_be32(0);
d24433cd
BH		 3028 break;
3029 default:
d0a381dd
BF		 3030 p = xdr_reserve_space(xdr, 4);
3031 if (!p)
3032 return nfserr_resource;
c373b0a4 3033 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3034 }
d24433cd 3035 break;
1da177e4
LT		 3036 default:
3037 BUG();
3038 }
3039 /* XXX save filehandle here */
3040out:
695e12f8 3041 return nfserr;
1da177e4
LT		 3042}
3043
695e12f8 3044static __be32
b37ad28b 3045nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3046{
d0a381dd
BF		 3047 struct xdr_stream *xdr = &resp->xdr;
3048
e2f282b9 3049 if (!nfserr)
d0a381dd 3050 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3051
695e12f8 3052 return nfserr;
1da177e4
LT		 3053}
3054
695e12f8 3055static __be32
b37ad28b 3056nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3057{
d0a381dd
BF		 3058 struct xdr_stream *xdr = &resp->xdr;
3059
e2f282b9 3060 if (!nfserr)
d0a381dd 3061 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3062
695e12f8 3063 return nfserr;
1da177e4
LT		 3064}
3065
dc97618d
BF		 3066static __be32 nfsd4_encode_splice_read(
3067 struct nfsd4_compoundres *resp,
3068 struct nfsd4_read *read,
3069 struct file *file, unsigned long maxcount)
1da177e4 3070{
ddd1ea56 3071 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3072 struct xdr_buf *buf = xdr->buf;
dc97618d 3073 u32 eof;
30596768 3074 int space_left;
dc97618d 3075 __be32 nfserr;
fec25fa4 3076 __be32 *p = xdr->p - 2;
1da177e4 3077
dc97618d
BF		 3078 /*
3079 * Don't inline pages unless we know there's room for eof,
3080 * count, and possible padding:
3081 */
3082 if (xdr->end - xdr->p < 3)
d0a381dd 3083 return nfserr_resource;
dc97618d
BF		 3084
3085 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3086 read->rd_offset, &maxcount);
3087 if (nfserr) {
3088 /*
3089 * nfsd_splice_actor may have already messed with the
3090 * page length; reset it so as not to confuse
3091 * xdr_truncate_encode:
3092 */
34a78b48 3093 buf->page_len = 0;
dc97618d 3094 return nfserr;
b0e35fda 3095 }
1da177e4 3096
dc97618d
BF		 3097 eof = (read->rd_offset + maxcount >=
3098 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3099
fec25fa4
BF		 3100 *(p++) = htonl(eof);
3101 *(p++) = htonl(maxcount);
dc97618d 3102
34a78b48
BF		 3103 buf->page_len = maxcount;
3104 buf->len += maxcount;
dc97618d 3105 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3106
3107 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3108 buf->tail[0].iov_base = xdr->p;
3109 buf->tail[0].iov_len = 0;
fec25fa4 3110 xdr->iov = buf->tail;
dc97618d 3111 if (maxcount&3) {
fec25fa4
BF		 3112 int pad = 4 - (maxcount&3);
3113
3114 *(xdr->p++) = 0;
3115
34a78b48 3116 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3117 buf->tail[0].iov_len = pad;
3118 buf->len += pad;
b0e35fda 3119 }
2825a7f9 3120
dc97618d 3121 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3122 buf->buflen - buf->len);
3123 buf->buflen = buf->len + space_left;
dc97618d
BF		 3124 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3125
3126 return 0;
3127}
3128
3129static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3130 struct nfsd4_read *read,
3131 struct file *file, unsigned long maxcount)
3132{
3133 struct xdr_stream *xdr = &resp->xdr;
3134 u32 eof;
3135 int v;
dc97618d 3136 int starting_len = xdr->buf->len - 8;
dc97618d 3137 long len;
b0420980 3138 int thislen;
dc97618d
BF		 3139 __be32 nfserr;
3140 __be32 tmp;
3141 __be32 *p;
b0420980
BF		 3142 u32 zzz = 0;
3143 int pad;
1da177e4
LT		 3144
3145 len = maxcount;
3146 v = 0;
6ff9897d 3147
b0420980
BF		 3148 thislen = (void *)xdr->end - (void *)xdr->p;
3149 if (len < thislen)
3150 thislen = len;
3151 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3152 WARN_ON_ONCE(!p);
3153 resp->rqstp->rq_vec[v].iov_base = p;
3154 resp->rqstp->rq_vec[v].iov_len = thislen;
3155 v++;
3156 len -= thislen;
3157
3158 while (len) {
6ff9897d 3159 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3160 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3161 WARN_ON_ONCE(!p);
3162 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3163 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3164 v++;
6ff9897d 3165 len -= thislen;
1da177e4
LT		 3166 }
3167 read->rd_vlen = v;
3168
dc97618d
BF		 3169 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3170 read->rd_vlen, &maxcount);
3171 if (nfserr)
1da177e4 3172 return nfserr;
b0420980 3173 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3174
44524359
N		 3175 eof = (read->rd_offset + maxcount >=
3176 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3177
dc97618d
BF		 3178 tmp = htonl(eof);
3179 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3180 tmp = htonl(maxcount);
3181 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3182
b0420980
BF		 3183 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3184 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3185 &zzz, pad);
1da177e4 3186 return 0;
dc97618d
BF		 3187
3188}
3189
3190static __be32
3191nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3192 struct nfsd4_read *read)
3193{
3194 unsigned long maxcount;
3195 struct xdr_stream *xdr = &resp->xdr;
3196 struct file *file = read->rd_filp;
3197 int starting_len = xdr->buf->len;
3198 struct raparms *ra;
3199 __be32 *p;
3200 __be32 err;
3201
3202 if (nfserr)
3203 return nfserr;
3204
3205 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3206 if (!p) {
3207 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3208 return nfserr_resource;
3209 }
b0420980
BF		 3210 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3211 WARN_ON_ONCE(1);
dc97618d
BF		 3212 return nfserr_resource;
3213 }
dc97618d
BF		 3214 xdr_commit_encode(xdr);
3215
3216 maxcount = svc_max_payload(resp->rqstp);
b0420980
BF		 3217 if (maxcount > xdr->buf->buflen - xdr->buf->len)
3218 maxcount = xdr->buf->buflen - xdr->buf->len;
dc97618d
BF		 3219 if (maxcount > read->rd_length)
3220 maxcount = read->rd_length;
3221
3222 if (!read->rd_filp) {
3223 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3224 &file, &ra);
3225 if (err)
3226 goto err_truncate;
3227 }
3228
3229 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3230 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3231 else
3232 err = nfsd4_encode_readv(resp, read, file, maxcount);
3233
3234 if (!read->rd_filp)
3235 nfsd_put_tmp_read_open(file, ra);
3236
3237err_truncate:
3238 if (err)
3239 xdr_truncate_encode(xdr, starting_len);
3240 return err;
1da177e4
LT		 3241}
3242
b37ad28b
AV		 3243static __be32
3244nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3245{
3246 int maxcount;
476a7b1f
BF		 3247 __be32 wire_count;
3248 int zero = 0;
ddd1ea56 3249 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3250 int length_offset = xdr->buf->len;
bc749ca4 3251 __be32 *p;
1da177e4
LT		 3252
3253 if (nfserr)
3254 return nfserr;
2825a7f9
BF		 3255
3256 p = xdr_reserve_space(xdr, 4);
3257 if (!p)
3258 return nfserr_resource;
1da177e4 3259 maxcount = PAGE_SIZE;
d0a381dd 3260
476a7b1f
BF		 3261 p = xdr_reserve_space(xdr, maxcount);
3262 if (!p)
4e21ac4b 3263 return nfserr_resource;
1da177e4
LT		 3264 /*
3265 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3266 * if they would overflow the buffer. Is this kosher in NFSv4? If
3267 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3268 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3269 */
476a7b1f
BF		 3270 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3271 (char *)p, &maxcount);
1da177e4 3272 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3273 nfserr = nfserr_inval;
3274 if (nfserr) {
1fcea5b2 3275 xdr_truncate_encode(xdr, length_offset);
1da177e4 3276 return nfserr;
d3f627c8 3277 }
1da177e4 3278
476a7b1f
BF		 3279 wire_count = htonl(maxcount);
3280 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3281 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3282 if (maxcount & 3)
3283 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3284 &zero, 4 - (maxcount&3));
1da177e4
LT		 3285 return 0;
3286}
3287
b37ad28b
AV		 3288static __be32
3289nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3290{
3291 int maxcount;
561f0ed4 3292 int bytes_left;
1da177e4 3293 loff_t offset;
561f0ed4 3294 __be64 wire_offset;
ddd1ea56 3295 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3296 int starting_len = xdr->buf->len;
bc749ca4 3297 __be32 *p;
1da177e4
LT		 3298
3299 if (nfserr)
3300 return nfserr;
1da177e4 3301
d0a381dd
BF		 3302 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3303 if (!p)
3304 return nfserr_resource;
1da177e4
LT		 3305
3306 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3307 *p++ = cpu_to_be32(0);
3308 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3309 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3310 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3311
3312 /*
561f0ed4
BF		 3313 * Number of bytes left for directory entries allowing for the
3314 * final 8 bytes of the readdir and a following failed op:
3315 */
3316 bytes_left = xdr->buf->buflen - xdr->buf->len
3317 - COMPOUND_ERR_SLACK_SPACE - 8;
3318 if (bytes_left < 0) {
3319 nfserr = nfserr_resource;
3320 goto err_no_verf;
3321 }
3322 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3323 /*
3324 * Note the rfc defines rd_maxcount as the size of the
3325 * READDIR4resok structure, which includes the verifier above
3326 * and the 8 bytes encoded at the end of this function:
1da177e4 3327 */
561f0ed4
BF		 3328 if (maxcount < 16) {
3329 nfserr = nfserr_toosmall;
1da177e4
LT		 3330 goto err_no_verf;
3331 }
561f0ed4 3332 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3333
561f0ed4
BF		 3334 readdir->xdr = xdr;
3335 readdir->rd_maxcount = maxcount;
1da177e4 3336 readdir->common.err = 0;
561f0ed4 3337 readdir->cookie_offset = 0;
1da177e4
LT		 3338
3339 offset = readdir->rd_cookie;
3340 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3341 &offset,
3342 &readdir->common, nfsd4_encode_dirent);
3343 if (nfserr == nfs_ok &&
3344 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3345 xdr->buf->len == starting_len + 8) {
3346 /* nothing encoded; which limit did we hit?: */
3347 if (maxcount - 16 < bytes_left)
3348 /* It was the fault of rd_maxcount: */
3349 nfserr = nfserr_toosmall;
3350 else
3351 /* We ran out of buffer space: */
3352 nfserr = nfserr_resource;
3353 }
1da177e4
LT		 3354 if (nfserr)
3355 goto err_no_verf;
3356
561f0ed4
BF		 3357 if (readdir->cookie_offset) {
3358 wire_offset = cpu_to_be64(offset);
3359 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3360 &wire_offset, 8);
3361 }
1da177e4 3362
561f0ed4
BF		 3363 p = xdr_reserve_space(xdr, 8);
3364 if (!p) {
3365 WARN_ON_ONCE(1);
3366 goto err_no_verf;
3367 }
1da177e4
LT		 3368 *p++ = 0; /* no more entries */
3369 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3370
3371 return 0;
3372err_no_verf:
1fcea5b2 3373 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3374 return nfserr;
3375}
3376
695e12f8 3377static __be32
b37ad28b 3378nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3379{
d0a381dd 3380 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3381 __be32 *p;
1da177e4
LT		 3382
3383 if (!nfserr) {
d0a381dd
BF		 3384 p = xdr_reserve_space(xdr, 20);
3385 if (!p)
3386 return nfserr_resource;
d05d5744 3387 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3388 }
695e12f8 3389 return nfserr;
1da177e4
LT		 3390}
3391
695e12f8 3392static __be32
b37ad28b 3393nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3394{
d0a381dd 3395 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3396 __be32 *p;
1da177e4
LT		 3397
3398 if (!nfserr) {
d0a381dd
BF		 3399 p = xdr_reserve_space(xdr, 40);
3400 if (!p)
3401 return nfserr_resource;
d05d5744
BF		 3402 p = encode_cinfo(p, &rename->rn_sinfo);
3403 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3404 }
695e12f8 3405 return nfserr;
1da177e4
LT		 3406}
3407
695e12f8 3408static __be32
d0a381dd 3409nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3410 __be32 nfserr, struct svc_export *exp)
dcb488a3 3411{
676e4ebd 3412 u32 i, nflavs, supported;
4796f457
BF		 3413 struct exp_flavor_info *flavs;
3414 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3415 __be32 *p, *flavorsp;
3416 static bool report = true;
dcb488a3
AA		 3417
3418 if (nfserr)
3419 goto out;
d0a381dd 3420 nfserr = nfserr_resource;
4796f457
BF		 3421 if (exp->ex_nflavors) {
3422 flavs = exp->ex_flavors;
3423 nflavs = exp->ex_nflavors;
3424 } else { /* Handling of some defaults in absence of real secinfo: */
3425 flavs = def_flavs;
3426 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3427 nflavs = 2;
3428 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3429 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3430 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3431 nflavs = 1;
3432 flavs[0].pseudoflavor
3433 = svcauth_gss_flavor(exp->ex_client);
3434 } else {
3435 nflavs = 1;
3436 flavs[0].pseudoflavor
3437 = exp->ex_client->flavour->flavour;
3438 }
3439 }
3440
676e4ebd 3441 supported = 0;
d0a381dd
BF		 3442 p = xdr_reserve_space(xdr, 4);
3443 if (!p)
3444 goto out;
676e4ebd 3445 flavorsp = p++; /* to be backfilled later */
676e4ebd 3446
4796f457 3447 for (i = 0; i < nflavs; i++) {
676e4ebd 3448 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3449 struct rpcsec_gss_info info;
dcb488a3 3450
676e4ebd
CL		 3451 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3452 supported++;
d0a381dd
BF		 3453 p = xdr_reserve_space(xdr, 4 + 4 +
3454 XDR_LEN(info.oid.len) + 4 + 4);
3455 if (!p)
3456 goto out;
c373b0a4 3457 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3458 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3459 *p++ = cpu_to_be32(info.qop);
3460 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3461 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3462 supported++;
d0a381dd
BF		 3463 p = xdr_reserve_space(xdr, 4);
3464 if (!p)
3465 goto out;
c373b0a4 3466 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3467 } else {
3468 if (report)
3469 pr_warn("NFS: SECINFO: security flavor %u "
3470 "is not supported\n", pf);
dcb488a3
AA		 3471 }
3472 }
a77c806f 3473
676e4ebd
CL		 3474 if (nflavs != supported)
3475 report = false;
3476 *flavorsp = htonl(supported);
d0a381dd 3477 nfserr = 0;
dcb488a3
AA		 3478out:
3479 if (exp)
3480 exp_put(exp);
695e12f8 3481 return nfserr;
dcb488a3
AA		 3482}
3483
22b6dee8
MJ		 3484static __be32
3485nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3486 struct nfsd4_secinfo *secinfo)
3487{
d0a381dd
BF		 3488 struct xdr_stream *xdr = &resp->xdr;
3489
3490 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3491}
3492
3493static __be32
3494nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3495 struct nfsd4_secinfo_no_name *secinfo)
3496{
d0a381dd
BF		 3497 struct xdr_stream *xdr = &resp->xdr;
3498
3499 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3500}
3501
1da177e4
LT		 3502/*
3503 * The SETATTR encode routine is special -- it always encodes a bitmap,
3504 * regardless of the error status.
3505 */
695e12f8 3506static __be32
b37ad28b 3507nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3508{
d0a381dd 3509 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3510 __be32 *p;
1da177e4 3511
d0a381dd
BF		 3512 p = xdr_reserve_space(xdr, 16);
3513 if (!p)
3514 return nfserr_resource;
1da177e4 3515 if (nfserr) {
c373b0a4
BF		 3516 *p++ = cpu_to_be32(3);
3517 *p++ = cpu_to_be32(0);
3518 *p++ = cpu_to_be32(0);
3519 *p++ = cpu_to_be32(0);
1da177e4
LT		 3520 }
3521 else {
c373b0a4
BF		 3522 *p++ = cpu_to_be32(3);
3523 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3524 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3525 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3526 }
695e12f8 3527 return nfserr;
1da177e4
LT		 3528}
3529
695e12f8 3530static __be32
b37ad28b 3531nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3532{
d0a381dd 3533 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3534 __be32 *p;
1da177e4
LT		 3535
3536 if (!nfserr) {
d0a381dd
BF		 3537 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3538 if (!p)
3539 return nfserr_resource;
0c0c267b
BF		 3540 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3541 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3542 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3543 }
3544 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3545 p = xdr_reserve_space(xdr, 8);
3546 if (!p)
3547 return nfserr_resource;
c373b0a4
BF		 3548 *p++ = cpu_to_be32(0);
3549 *p++ = cpu_to_be32(0);
1da177e4 3550 }
695e12f8 3551 return nfserr;
1da177e4
LT		 3552}
3553
695e12f8 3554static __be32
b37ad28b 3555nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3556{
d0a381dd 3557 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3558 __be32 *p;
1da177e4
LT		 3559
3560 if (!nfserr) {
d0a381dd
BF		 3561 p = xdr_reserve_space(xdr, 16);
3562 if (!p)
3563 return nfserr_resource;
c373b0a4
BF		 3564 *p++ = cpu_to_be32(write->wr_bytes_written);
3565 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3566 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3567 NFS4_VERIFIER_SIZE);
1da177e4 3568 }
695e12f8 3569 return nfserr;
1da177e4
LT		 3570}
3571
57266a6e
BF		 3572static const u32 nfs4_minimal_spo_must_enforce[2] = {
3573 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3574 1 << (OP_EXCHANGE_ID - 32) |
3575 1 << (OP_CREATE_SESSION - 32) |
3576 1 << (OP_DESTROY_SESSION - 32) |
3577 1 << (OP_DESTROY_CLIENTID - 32)
3578};
3579
2db134eb 3580static __be32
57b7b43b 3581nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3582 struct nfsd4_exchange_id *exid)
3583{
d0a381dd 3584 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3585 __be32 *p;
0733d213
AA		 3586 char *major_id;
3587 char *server_scope;
3588 int major_id_sz;
3589 int server_scope_sz;
3590 uint64_t minor_id = 0;
3591
3592 if (nfserr)
3593 return nfserr;
3594
3595 major_id = utsname()->nodename;
3596 major_id_sz = strlen(major_id);
3597 server_scope = utsname()->nodename;
3598 server_scope_sz = strlen(server_scope);
3599
d0a381dd 3600 p = xdr_reserve_space(xdr,
0733d213
AA		 3601 8 /* eir_clientid */ +
3602 4 /* eir_sequenceid */ +
3603 4 /* eir_flags */ +
a8bb84bc 3604 4 /* spr_how */);
d0a381dd
BF		 3605 if (!p)
3606 return nfserr_resource;
0733d213 3607
0c0c267b 3608 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3609 *p++ = cpu_to_be32(exid->seqid);
3610 *p++ = cpu_to_be32(exid->flags);
0733d213 3611
c373b0a4 3612 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3613
57266a6e
BF		 3614 switch (exid->spa_how) {
3615 case SP4_NONE:
3616 break;
3617 case SP4_MACH_CRED:
a8bb84bc 3618 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3619 p = xdr_reserve_space(xdr, 16);
3620 if (!p)
3621 return nfserr_resource;
a8bb84bc 3622
57266a6e 3623 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3624 *p++ = cpu_to_be32(2);
3625 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3626 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3627 /* empty spo_must_allow bitmap: */
c373b0a4 3628 *p++ = cpu_to_be32(0);
a8bb84bc 3629
57266a6e
BF		 3630 break;
3631 default:
3632 WARN_ON_ONCE(1);
3633 }
0733d213 3634
d0a381dd 3635 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3636 8 /* so_minor_id */ +
3637 4 /* so_major_id.len */ +
3638 (XDR_QUADLEN(major_id_sz) * 4) +
3639 4 /* eir_server_scope.len */ +
3640 (XDR_QUADLEN(server_scope_sz) * 4) +
3641 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3642 if (!p)
3643 return nfserr_resource;
a8bb84bc 3644
0733d213 3645 /* The server_owner struct */
b64c7f3b 3646 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3647 /* major id */
0c0c267b 3648 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3649
3650 /* Server scope */
0c0c267b 3651 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3652
3653 /* Implementation id */
c373b0a4 3654 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3655 return 0;
2db134eb
AA		 3656}
3657
3658static __be32
57b7b43b 3659nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3660 struct nfsd4_create_session *sess)
3661{
d0a381dd 3662 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3663 __be32 *p;
ec6b5d7b
AA		 3664
3665 if (nfserr)
3666 return nfserr;
3667
d0a381dd
BF		 3668 p = xdr_reserve_space(xdr, 24);
3669 if (!p)
3670 return nfserr_resource;
0c0c267b
BF		 3671 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3672 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3673 *p++ = cpu_to_be32(sess->seqid);
3674 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3675
d0a381dd
BF		 3676 p = xdr_reserve_space(xdr, 28);
3677 if (!p)
3678 return nfserr_resource;
c373b0a4
BF		 3679 *p++ = cpu_to_be32(0); /* headerpadsz */
3680 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3681 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3682 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3683 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3684 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3685 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3686
3687 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3688 p = xdr_reserve_space(xdr, 4);
3689 if (!p)
3690 return nfserr_resource;
c373b0a4 3691 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3692 }
3693
d0a381dd
BF		 3694 p = xdr_reserve_space(xdr, 28);
3695 if (!p)
3696 return nfserr_resource;
c373b0a4
BF		 3697 *p++ = cpu_to_be32(0); /* headerpadsz */
3698 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3699 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3700 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3701 *p++ = cpu_to_be32(sess->back_channel.maxops);
3702 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3703 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3704
3705 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3706 p = xdr_reserve_space(xdr, 4);
3707 if (!p)
3708 return nfserr_resource;
c373b0a4 3709 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3710 }
3711 return 0;
2db134eb
AA		 3712}
3713
c47d832b 3714static __be32
57b7b43b 3715nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3716 struct nfsd4_sequence *seq)
3717{
d0a381dd 3718 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3719 __be32 *p;
b85d4c01
BH		 3720
3721 if (nfserr)
3722 return nfserr;
3723
d0a381dd
BF		 3724 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3725 if (!p)
3726 return nfserr_resource;
0c0c267b
BF		 3727 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3728 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3729 *p++ = cpu_to_be32(seq->seqid);
3730 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3731 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3732 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3733 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3734 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3735
f5236013 3736 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3737 return 0;
2db134eb
AA		 3738}
3739
2355c596 3740static __be32
57b7b43b 3741nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3742 struct nfsd4_test_stateid *test_stateid)
3743{
d0a381dd 3744 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3745 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3746 __be32 *p;
17456804 3747
a11fcce1
BF		 3748 if (nfserr)
3749 return nfserr;
3750
d0a381dd
BF		 3751 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3752 if (!p)
3753 return nfserr_resource;
17456804 3754 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3755
03cfb420 3756 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3757 *p++ = stateid->ts_id_status;
17456804 3758 }
17456804
BS		 3759
3760 return nfserr;
3761}
3762
695e12f8
BH		 3763static __be32
3764nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3765{
3766 return nfserr;
3767}
3768
3769typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3770
2db134eb
AA		 3771/*
3772 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3773 * since we don't need to filter out obsolete ops as this is
3774 * done in the decoding phase.
3775 */
695e12f8 3776static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3777 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3778 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3779 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3780 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3781 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3782 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3783 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3784 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3785 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3786 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3787 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3788 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3789 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3790 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3791 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3792 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3793 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3794 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3795 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3796 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3797 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3798 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3799 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3800 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3801 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3802 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3803 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3804 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3805 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3806 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3807 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3808 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3809 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3810 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3811 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3812 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3813 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3814
3815 /* NFSv4.1 operations */
3816 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3817 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3818 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3819 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3820 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3821 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3822 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3823 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3824 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3825 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3826 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3827 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3828 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3829 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3830 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3831 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3832 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3833 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3834 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3835};
3836
496c262c 3837/*
a8095f7e
BF		 3838 * Calculate whether we still have space to encode repsize bytes.
3839 * There are two considerations:
3840 * - For NFS versions >=4.1, the size of the reply must stay within
3841 * session limits
3842 * - For all NFS versions, we must stay within limited preallocated
3843 * buffer space.
496c262c 3844 *
a8095f7e
BF		 3845 * This is called before the operation is processed, so can only provide
3846 * an upper estimate. For some nonidempotent operations (such as
3847 * getattr), it's not necessarily a problem if that estimate is wrong,
3848 * as we can fail it after processing without significant side effects.
496c262c 3849 */
a8095f7e 3850__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3851{
67492c99 3852 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3853 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3854
47ee5298
BF		 3855 if (buf->len + respsize <= buf->buflen)
3856 return nfs_ok;
3857 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3858 return nfserr_resource;
47ee5298
BF		 3859 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3860 WARN_ON_ONCE(1);
3861 return nfserr_rep_too_big_to_cache;
ea8d7720 3862 }
47ee5298 3863 return nfserr_rep_too_big;
496c262c
AA		 3864}
3865
1da177e4
LT		 3866void
3867nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3868{
082d4bd7 3869 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3870 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3871 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3872 int post_err_offset;
07d1f802 3873 nfsd4_enc encoder;
bc749ca4 3874 __be32 *p;
1da177e4 3875
d0a381dd
BF		 3876 p = xdr_reserve_space(xdr, 8);
3877 if (!p) {
3878 WARN_ON_ONCE(1);
3879 return;
3880 }
c373b0a4 3881 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3882 post_err_offset = xdr->buf->len;
1da177e4 3883
695e12f8
BH		 3884 if (op->opnum == OP_ILLEGAL)
3885 goto status;
3886 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3887 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3888 encoder = nfsd4_enc_ops[op->opnum];
3889 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3890 xdr_commit_encode(xdr);
3891
067e1ace 3892 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3893 if (!op->status) {
3894 int space_needed = 0;
3895 if (!nfsd4_last_compound_op(rqstp))
3896 space_needed = COMPOUND_ERR_SLACK_SPACE;
3897 op->status = nfsd4_check_resp_size(resp, space_needed);
3898 }
c8f13d97
BF		 3899 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3900 struct nfsd4_slot *slot = resp->cstate.slot;
3901
3902 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3903 op->status = nfserr_rep_too_big_to_cache;
3904 else
3905 op->status = nfserr_rep_too_big;
3906 }
07d1f802
BF		 3907 if (op->status == nfserr_resource ||
3908 op->status == nfserr_rep_too_big ||
3909 op->status == nfserr_rep_too_big_to_cache) {
3910 /*
3911 * The operation may have already been encoded or
3912 * partially encoded. No op returns anything additional
3913 * in the case of one of these three errors, so we can
3914 * just truncate back to after the status. But it's a
3915 * bug if we had to do this on a non-idempotent op:
3916 */
3917 warn_on_nonidempotent_op(op);
082d4bd7 3918 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3919 }
9411b1d4 3920 if (so) {
082d4bd7
BF		 3921 int len = xdr->buf->len - post_err_offset;
3922
9411b1d4 3923 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3924 so->so_replay.rp_buflen = len;
3925 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3926 so->so_replay.rp_buf, len);
9411b1d4 3927 }
695e12f8 3928status:
082d4bd7
BF		 3929 /* Note that op->status is already in network byte order: */
3930 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3931}
3932
3933/*
3934 * Encode the reply stored in the stateowner reply cache
3935 *
3936 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3937 * previously sent already encoded operation.
3938 *
3939 * called with nfs4_lock_state() held
3940 */
3941void
d0a381dd 3942nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3943{
bc749ca4 3944 __be32 *p;
1da177e4
LT		 3945 struct nfs4_replay *rp = op->replay;
3946
3947 BUG_ON(!rp);
3948
d0a381dd
BF		 3949 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3950 if (!p) {
3951 WARN_ON_ONCE(1);
3952 return;
3953 }
c373b0a4 3954 *p++ = cpu_to_be32(op->opnum);
1da177e4 3955 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3956
0c0c267b 3957 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3958}
3959
1da177e4 3960int
2ebbc012 3961nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3962{
3963 return xdr_ressize_check(rqstp, p);
3964}
3965
3e98abff 3966int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3967{
3e98abff
BF		 3968 struct svc_rqst *rqstp = rq;
3969 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3970
1da177e4
LT		 3971 if (args->ops != args->iops) {
3972 kfree(args->ops);
3973 args->ops = args->iops;
3974 }
f99d49ad
JJ		 3975 kfree(args->tmpp);
3976 args->tmpp = NULL;
1da177e4
LT		 3977 while (args->to_free) {
3978 struct tmpbuf *tb = args->to_free;
3979 args->to_free = tb->next;
3980 tb->release(tb->buf);
3981 kfree(tb);
3982 }
3e98abff 3983 return 1;
1da177e4
LT		 3984}
3985
3986int
2ebbc012 3987nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3988{
e874f9f8
JL		 3989 if (rqstp->rq_arg.head[0].iov_len % 4) {
3990 /* client is nuts */
3991 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3992 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3993 return 0;
3994 }
1da177e4
LT		 3995 args->p = p;
3996 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3997 args->pagelist = rqstp->rq_arg.pages;
3998 args->pagelen = rqstp->rq_arg.page_len;
3999 args->tmpp = NULL;
4000 args->to_free = NULL;
4001 args->ops = args->iops;
4002 args->rqstp = rqstp;
4003
3e98abff 4004 return !nfsd4_decode_compound(args);
1da177e4
LT		 4005}
4006
4007int
2ebbc012 4008nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4009{
4010 /*
4011 * All that remains is to write the tag and operation count...
4012 */
557ce264 4013 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4014 struct xdr_buf *buf = resp->xdr.buf;
4015
4016 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4017 buf->tail[0].iov_len);
dd97fdde 4018
2825a7f9
BF		 4019 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4020
1da177e4
LT		 4021 p = resp->tagp;
4022 *p++ = htonl(resp->taglen);
4023 memcpy(p, resp->tag, resp->taglen);
4024 p += XDR_QUADLEN(resp->taglen);
4025 *p++ = htonl(resp->opcnt);
4026
26c0c75e 4027 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4028 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4029 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4030 if (cs->status != nfserr_replay_cache) {
4031 nfsd4_store_cache_entry(resp);
73e79482 4032 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4033 }
d7682988 4034 /* Renew the clientid on success and on replay */
f0f51f5c 4035 spin_lock(&nn->client_lock);
221a6876 4036 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4037 spin_unlock(&nn->client_lock);
4038 put_client_renew(clp);
da3846a2 4039 }
1da177e4
LT		 4040 return 1;
4041}
4042
4043/*
4044 * Local variables:
4045 * c-basic-offset: 8
4046 * End:
4047 */
Linux kernel - Deliverables
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