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