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nfsd4: rename cr_linkname->cr_data
[linux-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
1da177e4
LT		 101#define READMEM(x,nbytes) do { \
102 x = (char *)p; \
103 p += XDR_QUADLEN(nbytes); \
104} while (0)
105#define SAVEMEM(x,nbytes) do { \
106 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
107 savemem(argp, p, nbytes) : \
108 (char *)p)) { \
817cb9d4
CL		 109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
1da177e4
LT		 111 goto xdr_error; \
112 } \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define COPYMEM(x,nbytes) do { \
116 memcpy((x), p, nbytes); \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119
120/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
121#define READ_BUF(nbytes) do { \
122 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
123 p = argp->p; \
124 argp->p += XDR_QUADLEN(nbytes); \
125 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 126 dprintk("NFSD: xdr error (%s:%d)\n", \
127 __FILE__, __LINE__); \
1da177e4
LT		 128 goto xdr_error; \
129 } \
130} while (0)
131
590b7431
BF		 132static void next_decode_page(struct nfsd4_compoundargs *argp)
133{
590b7431 134 argp->p = page_address(argp->pagelist[0]);
365da4ad 135 argp->pagelist++;
590b7431
BF		 136 if (argp->pagelen < PAGE_SIZE) {
137 argp->end = argp->p + (argp->pagelen>>2);
138 argp->pagelen = 0;
139 } else {
140 argp->end = argp->p + (PAGE_SIZE>>2);
141 argp->pagelen -= PAGE_SIZE;
142 }
143}
144
ca2a05aa 145static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 146{
147 /* We want more bytes than seem to be available.
148 * Maybe we need a new page, maybe we have just run out
149 */
ca2a05aa 150 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 151 __be32 *p;
1da177e4
LT		 152 if (avail + argp->pagelen < nbytes)
153 return NULL;
154 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
155 return NULL;
156 /* ok, we can do it with the current plus the next page */
157 if (nbytes <= sizeof(argp->tmp))
158 p = argp->tmp;
159 else {
f99d49ad 160 kfree(argp->tmpp);
1da177e4
LT		 161 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
162 if (!p)
163 return NULL;
164
165 }
ca2a05aa
BF		 166 /*
167 * The following memcpy is safe because read_buf is always
168 * called with nbytes > avail, and the two cases above both
169 * guarantee p points to at least nbytes bytes.
170 */
1da177e4 171 memcpy(p, argp->p, avail);
590b7431 172 next_decode_page(argp);
1da177e4
LT		 173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
174 argp->p += XDR_QUADLEN(nbytes - avail);
175 return p;
176}
177
60adfc50
AA		 178static int zero_clientid(clientid_t *clid)
179{
180 return (clid->cl_boot == 0) && (clid->cl_id == 0);
181}
182
2d8498db
CH		 183/**
184 * defer_free - mark an allocation as deferred freed
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);
7fb84306
BF		 601 create->cr_datalen = be32_to_cpup(p++);
602 READ_BUF(create->cr_datalen);
b829e919
BF		 603 /*
604 * The VFS will want a null-terminated string, and
605 * null-terminating in place isn't safe since this might
606 * end on a page boundary:
607 */
7fb84306
BF		 608 create->cr_data = kmalloc(create->cr_datalen + 1, GFP_KERNEL);
609 if (!create->cr_data)
b829e919 610 return nfserr_jukebox;
7fb84306
BF		 611 memcpy(create->cr_data, p, create->cr_datalen);
612 create->cr_data[create->cr_datalen] = '\0';
613 defer_free(argp, kfree, create->cr_data);
1da177e4
LT		 614 break;
615 case NF4BLK:
616 case NF4CHR:
617 READ_BUF(8);
06553991
BF		 618 create->cr_specdata1 = be32_to_cpup(p++);
619 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 620 break;
621 case NF4SOCK:
622 case NF4FIFO:
623 case NF4DIR:
624 default:
625 break;
626 }
627
628 READ_BUF(4);
06553991 629 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 630 READ_BUF(create->cr_namelen);
631 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 632 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 633 return status;
634
3c8e0316 635 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 636 &create->cr_acl, &create->cr_label);
c0d6fc8a 637 if (status)
1da177e4
LT		 638 goto out;
639
640 DECODE_TAIL;
641}
642
b37ad28b 643static inline __be32
1da177e4
LT		 644nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
645{
e31a1b66 646 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 647}
648
b37ad28b 649static inline __be32
1da177e4
LT		 650nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
651{
652 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
653}
654
b37ad28b 655static __be32
1da177e4
LT		 656nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
657{
658 DECODE_HEAD;
659
660 READ_BUF(4);
06553991 661 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 662 READ_BUF(link->li_namelen);
663 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 664 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 665 return status;
666
667 DECODE_TAIL;
668}
669
b37ad28b 670static __be32
1da177e4
LT		 671nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
672{
673 DECODE_HEAD;
674
1da177e4
LT		 675 /*
676 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
677 */
678 READ_BUF(28);
06553991 679 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 680 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
681 goto xdr_error;
06553991 682 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 683 p = xdr_decode_hyper(p, &lock->lk_offset);
684 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 685 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 686
687 if (lock->lk_is_new) {
e31a1b66 688 READ_BUF(4);
06553991 689 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 690 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
691 if (status)
692 return status;
693 READ_BUF(8 + sizeof(clientid_t));
06553991 694 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 695 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 696 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 697 READ_BUF(lock->lk_new_owner.len);
698 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
699 } else {
e31a1b66
BH		 700 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
701 if (status)
702 return status;
703 READ_BUF(4);
06553991 704 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 705 }
706
707 DECODE_TAIL;
708}
709
b37ad28b 710static __be32
1da177e4
LT		 711nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
712{
713 DECODE_HEAD;
714
715 READ_BUF(32);
06553991 716 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 717 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
718 goto xdr_error;
542d1ab3
BF		 719 p = xdr_decode_hyper(p, &lockt->lt_offset);
720 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 721 COPYMEM(&lockt->lt_clientid, 8);
06553991 722 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 723 READ_BUF(lockt->lt_owner.len);
724 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
725
726 DECODE_TAIL;
727}
728
b37ad28b 729static __be32
1da177e4
LT		 730nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
731{
732 DECODE_HEAD;
733
e31a1b66 734 READ_BUF(8);
06553991 735 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 736 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
737 goto xdr_error;
06553991 738 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 739 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
740 if (status)
741 return status;
742 READ_BUF(16);
542d1ab3
BF		 743 p = xdr_decode_hyper(p, &locku->lu_offset);
744 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 745
746 DECODE_TAIL;
747}
748
b37ad28b 749static __be32
1da177e4
LT		 750nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
751{
752 DECODE_HEAD;
753
754 READ_BUF(4);
06553991 755 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 756 READ_BUF(lookup->lo_len);
757 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 758 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 759 return status;
760
761 DECODE_TAIL;
762}
763
2c8bd7e0 764static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 765{
766 __be32 *p;
767 u32 w;
768
769 READ_BUF(4);
06553991 770 w = be32_to_cpup(p++);
2c8bd7e0
BH		 771 *share_access = w & NFS4_SHARE_ACCESS_MASK;
772 *deleg_want = w & NFS4_SHARE_WANT_MASK;
773 if (deleg_when)
774 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
775
04f9e664
BF		 776 switch (w & NFS4_SHARE_ACCESS_MASK) {
777 case NFS4_SHARE_ACCESS_READ:
778 case NFS4_SHARE_ACCESS_WRITE:
779 case NFS4_SHARE_ACCESS_BOTH:
780 break;
781 default:
782 return nfserr_bad_xdr;
783 }
fc0d14fe 784 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 785 if (!w)
786 return nfs_ok;
787 if (!argp->minorversion)
788 return nfserr_bad_xdr;
789 switch (w & NFS4_SHARE_WANT_MASK) {
790 case NFS4_SHARE_WANT_NO_PREFERENCE:
791 case NFS4_SHARE_WANT_READ_DELEG:
792 case NFS4_SHARE_WANT_WRITE_DELEG:
793 case NFS4_SHARE_WANT_ANY_DELEG:
794 case NFS4_SHARE_WANT_NO_DELEG:
795 case NFS4_SHARE_WANT_CANCEL:
796 break;
797 default:
798 return nfserr_bad_xdr;
799 }
92bac8c5 800 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 801 if (!w)
802 return nfs_ok;
2c8bd7e0
BH		 803
804 if (!deleg_when) /* open_downgrade */
805 return nfserr_inval;
04f9e664
BF		 806 switch (w) {
807 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
808 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 809 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
810 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 811 return nfs_ok;
812 }
813xdr_error:
814 return nfserr_bad_xdr;
815}
816
817static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
818{
819 __be32 *p;
820
821 READ_BUF(4);
06553991 822 *x = be32_to_cpup(p++);
04f9e664 823 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 824 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 825 return nfserr_bad_xdr;
826 return nfs_ok;
827xdr_error:
828 return nfserr_bad_xdr;
829}
830
a084daf5
BF		 831static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
832{
833 __be32 *p;
834
835 READ_BUF(4);
06553991 836 o->len = be32_to_cpup(p++);
a084daf5
BF		 837
838 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
839 return nfserr_bad_xdr;
840
841 READ_BUF(o->len);
842 SAVEMEM(o->data, o->len);
843 return nfs_ok;
844xdr_error:
845 return nfserr_bad_xdr;
846}
847
b37ad28b 848static __be32
1da177e4
LT		 849nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
850{
851 DECODE_HEAD;
2c8bd7e0 852 u32 dummy;
1da177e4
LT		 853
854 memset(open->op_bmval, 0, sizeof(open->op_bmval));
855 open->op_iattr.ia_valid = 0;
fe0750e5 856 open->op_openowner = NULL;
1da177e4 857
9d313b17 858 open->op_xdr_error = 0;
1da177e4 859 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 860 READ_BUF(4);
06553991 861 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 862 /* decode, yet ignore deleg_when until supported */
863 status = nfsd4_decode_share_access(argp, &open->op_share_access,
864 &open->op_deleg_want, &dummy);
04f9e664
BF		 865 if (status)
866 goto xdr_error;
867 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
868 if (status)
869 goto xdr_error;
a084daf5 870 READ_BUF(sizeof(clientid_t));
1da177e4 871 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 872 status = nfsd4_decode_opaque(argp, &open->op_owner);
873 if (status)
874 goto xdr_error;
875 READ_BUF(4);
06553991 876 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 877 switch (open->op_create) {
878 case NFS4_OPEN_NOCREATE:
879 break;
880 case NFS4_OPEN_CREATE:
881 READ_BUF(4);
06553991 882 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 883 switch (open->op_createmode) {
884 case NFS4_CREATE_UNCHECKED:
885 case NFS4_CREATE_GUARDED:
c0d6fc8a 886 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 887 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 888 if (status)
1da177e4
LT		 889 goto out;
890 break;
891 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 892 READ_BUF(NFS4_VERIFIER_SIZE);
893 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 894 break;
79fb54ab
BH		 895 case NFS4_CREATE_EXCLUSIVE4_1:
896 if (argp->minorversion < 1)
897 goto xdr_error;
ab4684d1
CL		 898 READ_BUF(NFS4_VERIFIER_SIZE);
899 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 900 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 901 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 902 if (status)
903 goto out;
904 break;
1da177e4
LT		 905 default:
906 goto xdr_error;
907 }
908 break;
909 default:
910 goto xdr_error;
911 }
912
913 /* open_claim */
914 READ_BUF(4);
06553991 915 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 916 switch (open->op_claim_type) {
917 case NFS4_OPEN_CLAIM_NULL:
918 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
919 READ_BUF(4);
06553991 920 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 921 READ_BUF(open->op_fname.len);
922 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 923 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 924 return status;
925 break;
926 case NFS4_OPEN_CLAIM_PREVIOUS:
927 READ_BUF(4);
06553991 928 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 929 break;
930 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 931 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
932 if (status)
933 return status;
934 READ_BUF(4);
06553991 935 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 936 READ_BUF(open->op_fname.len);
937 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 938 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 939 return status;
940 break;
8b289b2c
BF		 941 case NFS4_OPEN_CLAIM_FH:
942 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
943 if (argp->minorversion < 1)
944 goto xdr_error;
945 /* void */
946 break;
947 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
948 if (argp->minorversion < 1)
949 goto xdr_error;
950 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
951 if (status)
952 return status;
953 break;
1da177e4
LT		 954 default:
955 goto xdr_error;
956 }
957
958 DECODE_TAIL;
959}
960
b37ad28b 961static __be32
1da177e4
LT		 962nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
963{
964 DECODE_HEAD;
e1a90ebd
AS		 965
966 if (argp->minorversion >= 1)
967 return nfserr_notsupp;
968
e31a1b66
BH		 969 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
970 if (status)
971 return status;
972 READ_BUF(4);
06553991 973 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 974
1da177e4
LT		 975 DECODE_TAIL;
976}
977
b37ad28b 978static __be32
1da177e4
LT		 979nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
980{
981 DECODE_HEAD;
982
e31a1b66
BH		 983 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
984 if (status)
985 return status;
04f9e664 986 READ_BUF(4);
06553991 987 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 988 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
989 &open_down->od_deleg_want, NULL);
04f9e664
BF		 990 if (status)
991 return status;
992 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
993 if (status)
994 return status;
1da177e4
LT		 995 DECODE_TAIL;
996}
997
b37ad28b 998static __be32
1da177e4
LT		 999nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1000{
1001 DECODE_HEAD;
1002
1003 READ_BUF(4);
06553991 1004 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1005 if (putfh->pf_fhlen > NFS4_FHSIZE)
1006 goto xdr_error;
1007 READ_BUF(putfh->pf_fhlen);
1008 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1009
1010 DECODE_TAIL;
1011}
1012
e1a90ebd
AS		 1013static __be32
1014nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1015{
1016 if (argp->minorversion == 0)
1017 return nfs_ok;
1018 return nfserr_notsupp;
1019}
1020
b37ad28b 1021static __be32
1da177e4
LT		 1022nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1023{
1024 DECODE_HEAD;
1025
e31a1b66
BH		 1026 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1027 if (status)
1028 return status;
1029 READ_BUF(12);
542d1ab3 1030 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1031 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1032
1033 DECODE_TAIL;
1034}
1035
b37ad28b 1036static __be32
1da177e4
LT		 1037nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1038{
1039 DECODE_HEAD;
1040
1041 READ_BUF(24);
542d1ab3 1042 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1043 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1044 readdir->rd_dircount = be32_to_cpup(p++);
1045 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1046 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1047 goto out;
1048
1049 DECODE_TAIL;
1050}
1051
b37ad28b 1052static __be32
1da177e4
LT		 1053nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1054{
1055 DECODE_HEAD;
1056
1057 READ_BUF(4);
06553991 1058 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1059 READ_BUF(remove->rm_namelen);
1060 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1061 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1062 return status;
1063
1064 DECODE_TAIL;
1065}
1066
b37ad28b 1067static __be32
1da177e4
LT		 1068nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1069{
1070 DECODE_HEAD;
1071
1072 READ_BUF(4);
06553991 1073 rename->rn_snamelen = be32_to_cpup(p++);
1da177e4
LT		 1074 READ_BUF(rename->rn_snamelen + 4);
1075 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
06553991 1076 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1077 READ_BUF(rename->rn_tnamelen);
1078 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1079 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1080 return status;
a36b1725 1081 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1082 return status;
1083
1084 DECODE_TAIL;
1085}
1086
b37ad28b 1087static __be32
1da177e4
LT		 1088nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1089{
1090 DECODE_HEAD;
1091
e1a90ebd
AS		 1092 if (argp->minorversion >= 1)
1093 return nfserr_notsupp;
1094
1da177e4
LT		 1095 READ_BUF(sizeof(clientid_t));
1096 COPYMEM(clientid, sizeof(clientid_t));
1097
1098 DECODE_TAIL;
1099}
1100
dcb488a3
AA		 1101static __be32
1102nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1103 struct nfsd4_secinfo *secinfo)
1104{
1105 DECODE_HEAD;
1106
1107 READ_BUF(4);
06553991 1108 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1109 READ_BUF(secinfo->si_namelen);
1110 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1111 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1112 if (status)
1113 return status;
1114 DECODE_TAIL;
1115}
1116
04f4ad16
BF		 1117static __be32
1118nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1119 struct nfsd4_secinfo_no_name *sin)
1120{
1121 DECODE_HEAD;
1122
1123 READ_BUF(4);
06553991 1124 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1125 DECODE_TAIL;
1126}
1127
b37ad28b 1128static __be32
1da177e4
LT		 1129nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1130{
e31a1b66 1131 __be32 status;
1da177e4 1132
e31a1b66
BH		 1133 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1134 if (status)
1135 return status;
3c8e0316 1136 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1137 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1138}
1139
b37ad28b 1140static __be32
1da177e4
LT		 1141nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1142{
1143 DECODE_HEAD;
1144
e1a90ebd
AS		 1145 if (argp->minorversion >= 1)
1146 return nfserr_notsupp;
1147
ab4684d1
CL		 1148 READ_BUF(NFS4_VERIFIER_SIZE);
1149 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1150
a084daf5
BF		 1151 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1152 if (status)
1153 return nfserr_bad_xdr;
1154 READ_BUF(8);
06553991
BF		 1155 setclientid->se_callback_prog = be32_to_cpup(p++);
1156 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1da177e4
LT		 1157
1158 READ_BUF(setclientid->se_callback_netid_len + 4);
1159 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
06553991 1160 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4
LT		 1161
1162 READ_BUF(setclientid->se_callback_addr_len + 4);
1163 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
06553991 1164 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1165
1166 DECODE_TAIL;
1167}
1168
b37ad28b 1169static __be32
1da177e4
LT		 1170nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1171{
1172 DECODE_HEAD;
1173
e1a90ebd
AS		 1174 if (argp->minorversion >= 1)
1175 return nfserr_notsupp;
1176
ab4684d1 1177 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1178 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1179 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1180
1181 DECODE_TAIL;
1182}
1183
1184/* Also used for NVERIFY */
b37ad28b 1185static __be32
1da177e4
LT		 1186nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1187{
1da177e4
LT		 1188 DECODE_HEAD;
1189
1190 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1191 goto out;
1192
1193 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1194 * nfsd4_proc_verify */
1195
1da177e4 1196 READ_BUF(4);
06553991 1197 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1198 READ_BUF(verify->ve_attrlen);
1199 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1200
1201 DECODE_TAIL;
1202}
1203
b37ad28b 1204static __be32
1da177e4
LT		 1205nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1206{
1207 int avail;
1da177e4
LT		 1208 int len;
1209 DECODE_HEAD;
1210
e31a1b66
BH		 1211 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1212 if (status)
1213 return status;
1214 READ_BUF(16);
542d1ab3 1215 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1216 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1217 if (write->wr_stable_how > 2)
1218 goto xdr_error;
06553991 1219 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1220
1221 /* Sorry .. no magic macros for this.. *
1222 * READ_BUF(write->wr_buflen);
1223 * SAVEMEM(write->wr_buf, write->wr_buflen);
1224 */
1225 avail = (char*)argp->end - (char*)argp->p;
1226 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1227 dprintk("NFSD: xdr error (%s:%d)\n",
1228 __FILE__, __LINE__);
1da177e4
LT		 1229 goto xdr_error;
1230 }
70cc7f75
BF		 1231 write->wr_head.iov_base = p;
1232 write->wr_head.iov_len = avail;
70cc7f75 1233 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1234
1235 len = XDR_QUADLEN(write->wr_buflen) << 2;
1236 if (len >= avail) {
1237 int pages;
1238
1239 len -= avail;
1240
1241 pages = len >> PAGE_SHIFT;
1242 argp->pagelist += pages;
1243 argp->pagelen -= pages * PAGE_SIZE;
1244 len -= pages * PAGE_SIZE;
1245
1246 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1247 argp->pagelist++;
5a80a54d 1248 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1249 }
5a80a54d 1250 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1251
1252 DECODE_TAIL;
1253}
1254
b37ad28b 1255static __be32
1da177e4
LT		 1256nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1257{
1258 DECODE_HEAD;
1259
e1a90ebd
AS		 1260 if (argp->minorversion >= 1)
1261 return nfserr_notsupp;
1262
1da177e4
LT		 1263 READ_BUF(12);
1264 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1265 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1266 READ_BUF(rlockowner->rl_owner.len);
1267 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1268
60adfc50
AA		 1269 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1270 return nfserr_inval;
1da177e4
LT		 1271 DECODE_TAIL;
1272}
1273
2db134eb
AA		 1274static __be32
1275nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1276 struct nfsd4_exchange_id *exid)
2db134eb 1277{
5afa040b 1278 int dummy, tmp;
0733d213
AA		 1279 DECODE_HEAD;
1280
1281 READ_BUF(NFS4_VERIFIER_SIZE);
1282 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1283
a084daf5
BF		 1284 status = nfsd4_decode_opaque(argp, &exid->clname);
1285 if (status)
1286 return nfserr_bad_xdr;
0733d213
AA		 1287
1288 READ_BUF(4);
06553991 1289 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1290
1291 /* Ignore state_protect4_a */
1292 READ_BUF(4);
06553991 1293 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1294 switch (exid->spa_how) {
1295 case SP4_NONE:
1296 break;
1297 case SP4_MACH_CRED:
1298 /* spo_must_enforce */
1299 READ_BUF(4);
06553991 1300 dummy = be32_to_cpup(p++);
0733d213
AA		 1301 READ_BUF(dummy * 4);
1302 p += dummy;
1303
1304 /* spo_must_allow */
1305 READ_BUF(4);
06553991 1306 dummy = be32_to_cpup(p++);
0733d213
AA		 1307 READ_BUF(dummy * 4);
1308 p += dummy;
1309 break;
1310 case SP4_SSV:
1311 /* ssp_ops */
1312 READ_BUF(4);
06553991 1313 dummy = be32_to_cpup(p++);
0733d213
AA		 1314 READ_BUF(dummy * 4);
1315 p += dummy;
1316
1317 READ_BUF(4);
06553991 1318 dummy = be32_to_cpup(p++);
0733d213
AA		 1319 READ_BUF(dummy * 4);
1320 p += dummy;
1321
1322 /* ssp_hash_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_encr_algs<> */
1333 READ_BUF(4);
06553991 1334 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1335 while (tmp--) {
1336 READ_BUF(4);
06553991 1337 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1338 READ_BUF(dummy);
1339 p += XDR_QUADLEN(dummy);
1340 }
0733d213
AA		 1341
1342 /* ssp_window and ssp_num_gss_handles */
1343 READ_BUF(8);
06553991
BF		 1344 dummy = be32_to_cpup(p++);
1345 dummy = be32_to_cpup(p++);
0733d213
AA		 1346 break;
1347 default:
1348 goto xdr_error;
1349 }
1350
1351 /* Ignore Implementation ID */
1352 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1353 dummy = be32_to_cpup(p++);
0733d213
AA		 1354
1355 if (dummy > 1)
1356 goto xdr_error;
1357
1358 if (dummy == 1) {
1359 /* nii_domain */
1360 READ_BUF(4);
06553991 1361 dummy = be32_to_cpup(p++);
0733d213
AA		 1362 READ_BUF(dummy);
1363 p += XDR_QUADLEN(dummy);
1364
1365 /* nii_name */
1366 READ_BUF(4);
06553991 1367 dummy = be32_to_cpup(p++);
0733d213
AA		 1368 READ_BUF(dummy);
1369 p += XDR_QUADLEN(dummy);
1370
1371 /* nii_date */
1372 READ_BUF(12);
1373 p += 3;
1374 }
1375 DECODE_TAIL;
2db134eb
AA		 1376}
1377
1378static __be32
1379nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1380 struct nfsd4_create_session *sess)
1381{
ec6b5d7b 1382 DECODE_HEAD;
ec6b5d7b 1383 u32 dummy;
ec6b5d7b
AA		 1384
1385 READ_BUF(16);
1386 COPYMEM(&sess->clientid, 8);
06553991
BF		 1387 sess->seqid = be32_to_cpup(p++);
1388 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1389
1390 /* Fore channel attrs */
1391 READ_BUF(28);
06553991
BF		 1392 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1393 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1394 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1396 sess->fore_channel.maxops = be32_to_cpup(p++);
1397 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1398 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1399 if (sess->fore_channel.nr_rdma_attrs == 1) {
1400 READ_BUF(4);
06553991 1401 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1402 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1403 dprintk("Too many fore channel attr bitmaps!\n");
1404 goto xdr_error;
1405 }
1406
1407 /* Back channel attrs */
1408 READ_BUF(28);
06553991
BF		 1409 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1410 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1411 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1413 sess->back_channel.maxops = be32_to_cpup(p++);
1414 sess->back_channel.maxreqs = be32_to_cpup(p++);
1415 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1416 if (sess->back_channel.nr_rdma_attrs == 1) {
1417 READ_BUF(4);
06553991 1418 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1419 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1420 dprintk("Too many back channel attr bitmaps!\n");
1421 goto xdr_error;
1422 }
1423
acb2887e 1424 READ_BUF(4);
06553991 1425 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1426 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1427 DECODE_TAIL;
2db134eb
AA		 1428}
1429
1430static __be32
1431nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1432 struct nfsd4_destroy_session *destroy_session)
1433{
e10e0cfc
BH		 1434 DECODE_HEAD;
1435 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1436 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1437
1438 DECODE_TAIL;
2db134eb
AA		 1439}
1440
e1ca12df
BS		 1441static __be32
1442nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1443 struct nfsd4_free_stateid *free_stateid)
1444{
1445 DECODE_HEAD;
1446
1447 READ_BUF(sizeof(stateid_t));
06553991 1448 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1449 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1450
1451 DECODE_TAIL;
1452}
1453
2db134eb
AA		 1454static __be32
1455nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1456 struct nfsd4_sequence *seq)
1457{
b85d4c01
BH		 1458 DECODE_HEAD;
1459
1460 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1461 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1462 seq->seqid = be32_to_cpup(p++);
1463 seq->slotid = be32_to_cpup(p++);
1464 seq->maxslots = be32_to_cpup(p++);
1465 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1466
1467 DECODE_TAIL;
2db134eb
AA		 1468}
1469
17456804
BS		 1470static __be32
1471nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1472{
17456804 1473 int i;
03cfb420
BS		 1474 __be32 *p, status;
1475 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1476
1477 READ_BUF(4);
1478 test_stateid->ts_num_ids = ntohl(*p++);
1479
03cfb420 1480 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1481
1482 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1483 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1484 if (!stateid) {
afcf6792 1485 status = nfserrno(-ENOMEM);
03cfb420
BS		 1486 goto out;
1487 }
1488
1489 defer_free(argp, kfree, stateid);
1490 INIT_LIST_HEAD(&stateid->ts_id_list);
1491 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1492
1493 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1494 if (status)
03cfb420 1495 goto out;
17456804
BS		 1496 }
1497
1498 status = 0;
1499out:
1500 return status;
1501xdr_error:
1502 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1503 status = nfserr_bad_xdr;
1504 goto out;
1505}
1506
345c2842
MJ		 1507static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1508{
1509 DECODE_HEAD;
1510
1511 READ_BUF(8);
1512 COPYMEM(&dc->clientid, 8);
1513
1514 DECODE_TAIL;
1515}
1516
4dc6ec00
BF		 1517static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1518{
1519 DECODE_HEAD;
1520
1521 READ_BUF(4);
06553991 1522 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1523
1524 DECODE_TAIL;
1525}
1526
347e0ad9
BH		 1527static __be32
1528nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1529{
1530 return nfs_ok;
1531}
1532
3c375c6f
BH		 1533static __be32
1534nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1535{
1e685ec2 1536 return nfserr_notsupp;
3c375c6f
BH		 1537}
1538
347e0ad9
BH		 1539typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1540
1541static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1542 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1543 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1544 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1545 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1546 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1547 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1548 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1549 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1550 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1551 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1552 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1553 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1554 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1555 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1557 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1558 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1559 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1560 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1561 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1562 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1563 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1565 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1566 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1567 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1568 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1569 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1570 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1571 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1572 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1573 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1574 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1575 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1576 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1577 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1578 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1579
1580 /* new operations for NFSv4.1 */
cb73a9f4 1581 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1582 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1583 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1584 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1585 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1586 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1587 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1590 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1591 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1592 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1593 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1594 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1595 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1596 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1597 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1598 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1599 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1600};
1601
e1a90ebd
AS		 1602static inline bool
1603nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1604{
8217d146 1605 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1606 return false;
8217d146 1607 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1608 return false;
8217d146
AS		 1609 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1610 return false;
1611 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1612 return false;
1613 return true;
1614}
f2feb96b 1615
b37ad28b 1616static __be32
1da177e4
LT		 1617nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1618{
1619 DECODE_HEAD;
1620 struct nfsd4_op *op;
1091006c 1621 bool cachethis = false;
a5cddc88
BF		 1622 int auth_slack= argp->rqstp->rq_auth_slack;
1623 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1624 int readcount = 0;
1625 int readbytes = 0;
1da177e4
LT		 1626 int i;
1627
1da177e4 1628 READ_BUF(4);
06553991 1629 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1630 READ_BUF(argp->taglen + 8);
1631 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1632 argp->minorversion = be32_to_cpup(p++);
1633 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1634 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1635
1636 if (argp->taglen > NFSD4_MAX_TAGLEN)
1637 goto xdr_error;
1638 if (argp->opcnt > 100)
1639 goto xdr_error;
1640
e8c96f8c 1641 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1642 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1643 if (!argp->ops) {
1644 argp->ops = argp->iops;
817cb9d4 1645 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1646 goto xdr_error;
1647 }
1648 }
1649
e1a90ebd 1650 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1651 argp->opcnt = 0;
1652
1da177e4
LT		 1653 for (i = 0; i < argp->opcnt; i++) {
1654 op = &argp->ops[i];
1655 op->replay = NULL;
1656
8a61b18c 1657 READ_BUF(4);
06553991 1658 op->opnum = be32_to_cpup(p++);
1da177e4 1659
e1a90ebd
AS		 1660 if (nfsd4_opnum_in_range(argp, op))
1661 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1662 else {
1da177e4
LT		 1663 op->opnum = OP_ILLEGAL;
1664 op->status = nfserr_op_illegal;
1da177e4 1665 }
1091006c
BF		 1666 /*
1667 * We'll try to cache the result in the DRC if any one
1668 * op in the compound wants to be cached:
1669 */
1670 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1671
b0e35fda
BF		 1672 if (op->opnum == OP_READ) {
1673 readcount++;
1674 readbytes += nfsd4_max_reply(argp->rqstp, op);
1675 } else
1676 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1677
1678 if (op->status) {
1679 argp->opcnt = i+1;
1680 break;
1681 }
1da177e4 1682 }
1091006c
BF		 1683 /* Sessions make the DRC unnecessary: */
1684 if (argp->minorversion)
1685 cachethis = false;
b0e35fda 1686 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1687 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1688
a5cddc88 1689 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
b0e35fda
BF		 1690 argp->rqstp->rq_splice_ok = false;
1691
1da177e4
LT		 1692 DECODE_TAIL;
1693}
1da177e4 1694
d05d5744 1695static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1696{
1697 if (IS_I_VERSION(inode)) {
d05d5744 1698 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1699 } else {
d05d5744
BF		 1700 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1701 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1702 }
d05d5744 1703 return p;
c654b8a9
BF		 1704}
1705
d05d5744 1706static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1707{
d05d5744 1708 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1709 if (c->change_supported) {
d05d5744
BF		 1710 p = xdr_encode_hyper(p, c->before_change);
1711 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1712 } else {
d05d5744
BF		 1713 *p++ = cpu_to_be32(c->before_ctime_sec);
1714 *p++ = cpu_to_be32(c->before_ctime_nsec);
1715 *p++ = cpu_to_be32(c->after_ctime_sec);
1716 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1717 }
d05d5744 1718 return p;
c654b8a9 1719}
1da177e4 1720
81c3f413 1721/* Encode as an array of strings the string given with components
e7a0444a 1722 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1723 */
ddd1ea56
BF		 1724static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1725 char *components, char esc_enter,
1726 char esc_exit)
81c3f413 1727{
ddd1ea56 1728 __be32 *p;
082d4bd7
BF		 1729 __be32 pathlen;
1730 int pathlen_offset;
81c3f413 1731 int strlen, count=0;
e7a0444a 1732 char *str, *end, *next;
81c3f413
BF		 1733
1734 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1735
1736 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1737 p = xdr_reserve_space(xdr, 4);
1738 if (!p)
81c3f413 1739 return nfserr_resource;
082d4bd7
BF		 1740 p++; /* We will fill this in with @count later */
1741
81c3f413
BF		 1742 end = str = components;
1743 while (*end) {
e7a0444a
WAA		 1744 bool found_esc = false;
1745
1746 /* try to parse as esc_start, ..., esc_end, sep */
1747 if (*str == esc_enter) {
1748 for (; *end && (*end != esc_exit); end++)
1749 /* find esc_exit or end of string */;
1750 next = end + 1;
1751 if (*end && (!*next || *next == sep)) {
1752 str++;
1753 found_esc = true;
1754 }
1755 }
1756
1757 if (!found_esc)
1758 for (; *end && (*end != sep); end++)
1759 /* find sep or end of string */;
1760
81c3f413
BF		 1761 strlen = end - str;
1762 if (strlen) {
ddd1ea56
BF		 1763 p = xdr_reserve_space(xdr, strlen + 4);
1764 if (!p)
81c3f413 1765 return nfserr_resource;
0c0c267b 1766 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1767 count++;
1768 }
1769 else
1770 end++;
1771 str = end;
1772 }
082d4bd7
BF		 1773 pathlen = htonl(xdr->buf->len - pathlen_offset);
1774 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1775 return 0;
1776}
1777
e7a0444a
WAA		 1778/* Encode as an array of strings the string given with components
1779 * separated @sep.
1780 */
ddd1ea56
BF		 1781static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1782 char *components)
e7a0444a 1783{
ddd1ea56 1784 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1785}
1786
81c3f413
BF		 1787/*
1788 * encode a location element of a fs_locations structure
1789 */
ddd1ea56
BF		 1790static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1791 struct nfsd4_fs_location *location)
81c3f413 1792{
b37ad28b 1793 __be32 status;
81c3f413 1794
ddd1ea56 1795 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1796 '[', ']');
81c3f413
BF		 1797 if (status)
1798 return status;
ddd1ea56 1799 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1800 if (status)
1801 return status;
81c3f413
BF		 1802 return 0;
1803}
1804
1805/*
ed748aac 1806 * Encode a path in RFC3530 'pathname4' format
81c3f413 1807 */
ddd1ea56
BF		 1808static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1809 const struct path *root,
1810 const struct path *path)
81c3f413 1811{
301f0268 1812 struct path cur = *path;
ddd1ea56 1813 __be32 *p;
ed748aac
TM		 1814 struct dentry **components = NULL;
1815 unsigned int ncomponents = 0;
1816 __be32 err = nfserr_jukebox;
81c3f413 1817
ed748aac 1818 dprintk("nfsd4_encode_components(");
81c3f413 1819
ed748aac
TM		 1820 path_get(&cur);
1821 /* First walk the path up to the nfsd root, and store the
1822 * dentries/path components in an array.
1823 */
1824 for (;;) {
1825 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1826 break;
1827 if (cur.dentry == cur.mnt->mnt_root) {
1828 if (follow_up(&cur))
1829 continue;
1830 goto out_free;
1831 }
1832 if ((ncomponents & 15) == 0) {
1833 struct dentry **new;
1834 new = krealloc(components,
1835 sizeof(*new) * (ncomponents + 16),
1836 GFP_KERNEL);
1837 if (!new)
1838 goto out_free;
1839 components = new;
1840 }
1841 components[ncomponents++] = cur.dentry;
1842 cur.dentry = dget_parent(cur.dentry);
1843 }
ddd1ea56
BF		 1844 err = nfserr_resource;
1845 p = xdr_reserve_space(xdr, 4);
1846 if (!p)
ed748aac 1847 goto out_free;
c373b0a4 1848 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1849
1850 while (ncomponents) {
1851 struct dentry *dentry = components[ncomponents - 1];
301f0268 1852 unsigned int len;
ed748aac 1853
301f0268
AV		 1854 spin_lock(&dentry->d_lock);
1855 len = dentry->d_name.len;
ddd1ea56
BF		 1856 p = xdr_reserve_space(xdr, len + 4);
1857 if (!p) {
301f0268 1858 spin_unlock(&dentry->d_lock);
ed748aac 1859 goto out_free;
301f0268 1860 }
0c0c267b 1861 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1862 dprintk("/%s", dentry->d_name.name);
301f0268 1863 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1864 dput(dentry);
1865 ncomponents--;
81c3f413 1866 }
ed748aac 1867
ed748aac
TM		 1868 err = 0;
1869out_free:
1870 dprintk(")\n");
1871 while (ncomponents)
1872 dput(components[--ncomponents]);
1873 kfree(components);
1874 path_put(&cur);
1875 return err;
1876}
1877
ddd1ea56
BF		 1878static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1879 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1880{
1881 struct svc_export *exp_ps;
1882 __be32 res;
1883
1884 exp_ps = rqst_find_fsidzero_export(rqstp);
1885 if (IS_ERR(exp_ps))
1886 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1887 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1888 exp_put(exp_ps);
1889 return res;
81c3f413
BF		 1890}
1891
1892/*
1893 * encode a fs_locations structure
1894 */
ddd1ea56
BF		 1895static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1896 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1897{
b37ad28b 1898 __be32 status;
cc45f017 1899 int i;
ddd1ea56 1900 __be32 *p;
81c3f413 1901 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1902
ddd1ea56 1903 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1904 if (status)
1905 return status;
ddd1ea56
BF		 1906 p = xdr_reserve_space(xdr, 4);
1907 if (!p)
81c3f413 1908 return nfserr_resource;
c373b0a4 1909 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1910 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1911 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1912 if (status)
1913 return status;
1914 }
81c3f413
BF		 1915 return 0;
1916}
1da177e4 1917
3d2544b1
BF		 1918static u32 nfs4_file_type(umode_t mode)
1919{
1920 switch (mode & S_IFMT) {
1921 case S_IFIFO: return NF4FIFO;
1922 case S_IFCHR: return NF4CHR;
1923 case S_IFDIR: return NF4DIR;
1924 case S_IFBLK: return NF4BLK;
1925 case S_IFLNK: return NF4LNK;
1926 case S_IFREG: return NF4REG;
1927 case S_IFSOCK: return NF4SOCK;
1928 default: return NF4BAD;
1929 };
1930}
1da177e4 1931
b37ad28b 1932static inline __be32
ddd1ea56
BF		 1933nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1934 struct nfs4_ace *ace)
1da177e4 1935{
3554116d 1936 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1937 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1938 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1939 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1940 else
ddd1ea56 1941 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1942}
1943
42ca0993
BF		 1944#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1945 FATTR4_WORD0_RDATTR_ERROR)
1946#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1947
18032ca0
DQ		 1948#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1949static inline __be32
ddd1ea56
BF		 1950nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1951 void *context, int len)
18032ca0 1952{
ddd1ea56 1953 __be32 *p;
18032ca0 1954
ddd1ea56
BF		 1955 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1956 if (!p)
18032ca0
DQ		 1957 return nfserr_resource;
1958
1959 /*
1960 * For now we use a 0 here to indicate the null translation; in
1961 * the future we may place a call to translation code here.
1962 */
c373b0a4
BF		 1963 *p++ = cpu_to_be32(0); /* lfs */
1964 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1965 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1966 return 0;
1967}
1968#else
1969static inline __be32
ddd1ea56
BF		 1970nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1971 void *context, int len)
18032ca0
DQ		 1972{ return 0; }
1973#endif
1974
b37ad28b 1975static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1976{
1977 /* As per referral draft: */
1978 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1979 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1980 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1981 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1982 *rdattr_err = NFSERR_MOVED;
1983 else
1984 return nfserr_moved;
1985 }
1986 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1987 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1988 return 0;
1989}
1da177e4 1990
ae7095a7
BF		 1991
1992static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1993{
1994 struct path path = exp->ex_path;
1995 int err;
1996
1997 path_get(&path);
1998 while (follow_up(&path)) {
1999 if (path.dentry != path.mnt->mnt_root)
2000 break;
2001 }
3dadecce 2002 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2003 path_put(&path);
2004 return err;
2005}
2006
1da177e4
LT		 2007/*
2008 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2009 * ourselves.
1da177e4 2010 */
da2ebce6 2011static __be32
d5184658
BF		 2012nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2013 struct svc_export *exp,
2014 struct dentry *dentry, u32 *bmval,
406a7ea9 2015 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2016{
2017 u32 bmval0 = bmval[0];
2018 u32 bmval1 = bmval[1];
7e705706 2019 u32 bmval2 = bmval[2];
1da177e4 2020 struct kstat stat;
d50e6136 2021 struct svc_fh *tempfh = NULL;
1da177e4 2022 struct kstatfs statfs;
ddd1ea56 2023 __be32 *p;
1fcea5b2 2024 int starting_len = xdr->buf->len;
082d4bd7
BF		 2025 int attrlen_offset;
2026 __be32 attrlen;
1da177e4
LT		 2027 u32 dummy;
2028 u64 dummy64;
42ca0993 2029 u32 rdattr_err = 0;
b37ad28b 2030 __be32 status;
b8dd7b9a 2031 int err;
1da177e4
LT		 2032 int aclsupport = 0;
2033 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2034 void *context = NULL;
2035 int contextlen;
2036 bool contextsupport = false;
7e705706
AA		 2037 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2038 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2039 struct path path = {
2040 .mnt = exp->ex_path.mnt,
2041 .dentry = dentry,
2042 };
3d733711 2043 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2044
2045 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2046 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2047 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2048 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2049
42ca0993 2050 if (exp->ex_fslocs.migrated) {
7e705706 2051 BUG_ON(bmval[2]);
42ca0993
BF		 2052 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2053 if (status)
2054 goto out;
2055 }
2056
3dadecce 2057 err = vfs_getattr(&path, &stat);
b8dd7b9a 2058 if (err)
1da177e4 2059 goto out_nfserr;
12337901
CH		 2060 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2061 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2062 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2063 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2064 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2065 if (err)
1da177e4
LT		 2066 goto out_nfserr;
2067 }
2068 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2069 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2070 status = nfserr_jukebox;
2071 if (!tempfh)
2072 goto out;
2073 fh_init(tempfh, NFS4_FHSIZE);
2074 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2075 if (status)
2076 goto out;
d50e6136 2077 fhp = tempfh;
1da177e4
LT		 2078 }
2079 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2080 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2081 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2082 aclsupport = (err == 0);
1da177e4 2083 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2084 if (err == -EOPNOTSUPP)
1da177e4 2085 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2086 else if (err == -EINVAL) {
1da177e4
LT		 2087 status = nfserr_attrnotsupp;
2088 goto out;
b8dd7b9a 2089 } else if (err != 0)
1da177e4
LT		 2090 goto out_nfserr;
2091 }
2092 }
1da177e4 2093
18032ca0
DQ		 2094#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2095 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2096 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2097 err = security_inode_getsecctx(dentry->d_inode,
2098 &context, &contextlen);
2099 contextsupport = (err == 0);
2100 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2101 if (err == -EOPNOTSUPP)
2102 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2103 else if (err)
2104 goto out_nfserr;
2105 }
2106 }
2107#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2108
2b44f1ba 2109 if (bmval2) {
ddd1ea56
BF		 2110 p = xdr_reserve_space(xdr, 16);
2111 if (!p)
2b44f1ba 2112 goto out_resource;
c373b0a4
BF		 2113 *p++ = cpu_to_be32(3);
2114 *p++ = cpu_to_be32(bmval0);
2115 *p++ = cpu_to_be32(bmval1);
2116 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2117 } else if (bmval1) {
ddd1ea56
BF		 2118 p = xdr_reserve_space(xdr, 12);
2119 if (!p)
2b44f1ba 2120 goto out_resource;
c373b0a4
BF		 2121 *p++ = cpu_to_be32(2);
2122 *p++ = cpu_to_be32(bmval0);
2123 *p++ = cpu_to_be32(bmval1);
7e705706 2124 } else {
ddd1ea56
BF		 2125 p = xdr_reserve_space(xdr, 8);
2126 if (!p)
2b44f1ba 2127 goto out_resource;
c373b0a4
BF		 2128 *p++ = cpu_to_be32(1);
2129 *p++ = cpu_to_be32(bmval0);
7e705706 2130 }
082d4bd7
BF		 2131
2132 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2133 p = xdr_reserve_space(xdr, 4);
2134 if (!p)
2135 goto out_resource;
082d4bd7 2136 p++; /* to be backfilled later */
1da177e4
LT		 2137
2138 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2139 u32 word0 = nfsd_suppattrs0(minorversion);
2140 u32 word1 = nfsd_suppattrs1(minorversion);
2141 u32 word2 = nfsd_suppattrs2(minorversion);
2142
42ca0993
BF		 2143 if (!aclsupport)
2144 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2145 if (!contextsupport)
2146 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2147 if (!word2) {
ddd1ea56
BF		 2148 p = xdr_reserve_space(xdr, 12);
2149 if (!p)
2b44f1ba 2150 goto out_resource;
c373b0a4
BF		 2151 *p++ = cpu_to_be32(2);
2152 *p++ = cpu_to_be32(word0);
2153 *p++ = cpu_to_be32(word1);
7e705706 2154 } else {
ddd1ea56
BF		 2155 p = xdr_reserve_space(xdr, 16);
2156 if (!p)
2b44f1ba 2157 goto out_resource;
c373b0a4
BF		 2158 *p++ = cpu_to_be32(3);
2159 *p++ = cpu_to_be32(word0);
2160 *p++ = cpu_to_be32(word1);
2161 *p++ = cpu_to_be32(word2);
7e705706 2162 }
1da177e4
LT		 2163 }
2164 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2165 p = xdr_reserve_space(xdr, 4);
2166 if (!p)
1da177e4 2167 goto out_resource;
3d2544b1 2168 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2169 if (dummy == NF4BAD) {
2170 status = nfserr_serverfault;
2171 goto out;
2172 }
c373b0a4 2173 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2174 }
2175 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2176 p = xdr_reserve_space(xdr, 4);
2177 if (!p)
1da177e4 2178 goto out_resource;
49640001 2179 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2180 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2181 else
c373b0a4
BF		 2182 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2183 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2184 }
2185 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2186 p = xdr_reserve_space(xdr, 8);
2187 if (!p)
1da177e4 2188 goto out_resource;
d05d5744 2189 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2190 }
2191 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2192 p = xdr_reserve_space(xdr, 8);
2193 if (!p)
1da177e4 2194 goto out_resource;
b64c7f3b 2195 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2196 }
2197 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2198 p = xdr_reserve_space(xdr, 4);
2199 if (!p)
1da177e4 2200 goto out_resource;
c373b0a4 2201 *p++ = cpu_to_be32(1);
1da177e4
LT		 2202 }
2203 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2204 p = xdr_reserve_space(xdr, 4);
2205 if (!p)
1da177e4 2206 goto out_resource;
c373b0a4 2207 *p++ = cpu_to_be32(1);
1da177e4
LT		 2208 }
2209 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2210 p = xdr_reserve_space(xdr, 4);
2211 if (!p)
1da177e4 2212 goto out_resource;
c373b0a4 2213 *p++ = cpu_to_be32(0);
1da177e4
LT		 2214 }
2215 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2216 p = xdr_reserve_space(xdr, 16);
2217 if (!p)
1da177e4 2218 goto out_resource;
42ca0993 2219 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2220 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2221 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2222 } else switch(fsid_source(fhp)) {
2223 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2224 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2225 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2226 break;
2227 case FSIDSOURCE_DEV:
c373b0a4
BF		 2228 *p++ = cpu_to_be32(0);
2229 *p++ = cpu_to_be32(MAJOR(stat.dev));
2230 *p++ = cpu_to_be32(0);
2231 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2232 break;
2233 case FSIDSOURCE_UUID:
94eb3689
KM		 2234 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2235 EX_UUID_LEN);
af6a4e28 2236 break;
1da177e4
LT		 2237 }
2238 }
2239 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2240 p = xdr_reserve_space(xdr, 4);
2241 if (!p)
1da177e4 2242 goto out_resource;
c373b0a4 2243 *p++ = cpu_to_be32(0);
1da177e4
LT		 2244 }
2245 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2246 p = xdr_reserve_space(xdr, 4);
2247 if (!p)
1da177e4 2248 goto out_resource;
c373b0a4 2249 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2250 }
2251 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2252 p = xdr_reserve_space(xdr, 4);
2253 if (!p)
1da177e4 2254 goto out_resource;
c373b0a4 2255 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2256 }
2257 if (bmval0 & FATTR4_WORD0_ACL) {
2258 struct nfs4_ace *ace;
1da177e4
LT		 2259
2260 if (acl == NULL) {
ddd1ea56
BF		 2261 p = xdr_reserve_space(xdr, 4);
2262 if (!p)
1da177e4
LT		 2263 goto out_resource;
2264
c373b0a4 2265 *p++ = cpu_to_be32(0);
1da177e4
LT		 2266 goto out_acl;
2267 }
ddd1ea56
BF		 2268 p = xdr_reserve_space(xdr, 4);
2269 if (!p)
1da177e4 2270 goto out_resource;
c373b0a4 2271 *p++ = cpu_to_be32(acl->naces);
1da177e4 2272
28e05dd8 2273 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2274 p = xdr_reserve_space(xdr, 4*3);
2275 if (!p)
1da177e4 2276 goto out_resource;
c373b0a4
BF		 2277 *p++ = cpu_to_be32(ace->type);
2278 *p++ = cpu_to_be32(ace->flag);
2279 *p++ = cpu_to_be32(ace->access_mask &
2280 NFS4_ACE_MASK_ALL);
ddd1ea56 2281 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2282 if (status)
2283 goto out;
2284 }
2285 }
2286out_acl:
2287 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2288 p = xdr_reserve_space(xdr, 4);
2289 if (!p)
1da177e4 2290 goto out_resource;
c373b0a4 2291 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2292 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2293 }
2294 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2295 p = xdr_reserve_space(xdr, 4);
2296 if (!p)
1da177e4 2297 goto out_resource;
c373b0a4 2298 *p++ = cpu_to_be32(1);
1da177e4
LT		 2299 }
2300 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2301 p = xdr_reserve_space(xdr, 4);
2302 if (!p)
1da177e4 2303 goto out_resource;
c373b0a4 2304 *p++ = cpu_to_be32(0);
1da177e4
LT		 2305 }
2306 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2307 p = xdr_reserve_space(xdr, 4);
2308 if (!p)
1da177e4 2309 goto out_resource;
c373b0a4 2310 *p++ = cpu_to_be32(1);
1da177e4
LT		 2311 }
2312 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2313 p = xdr_reserve_space(xdr, 4);
2314 if (!p)
1da177e4 2315 goto out_resource;
c373b0a4 2316 *p++ = cpu_to_be32(1);
1da177e4
LT		 2317 }
2318 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2319 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2320 if (!p)
1da177e4 2321 goto out_resource;
0c0c267b
BF		 2322 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2323 fhp->fh_handle.fh_size);
1da177e4
LT		 2324 }
2325 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2326 p = xdr_reserve_space(xdr, 8);
2327 if (!p)
1da177e4 2328 goto out_resource;
b64c7f3b 2329 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2330 }
2331 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2332 p = xdr_reserve_space(xdr, 8);
2333 if (!p)
1da177e4 2334 goto out_resource;
b64c7f3b 2335 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2336 }
2337 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2338 p = xdr_reserve_space(xdr, 8);
2339 if (!p)
1da177e4 2340 goto out_resource;
b64c7f3b 2341 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2342 }
2343 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2344 p = xdr_reserve_space(xdr, 8);
2345 if (!p)
1da177e4 2346 goto out_resource;
b64c7f3b 2347 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2348 }
81c3f413 2349 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2350 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2351 if (status)
2352 goto out;
2353 }
1da177e4 2354 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2355 p = xdr_reserve_space(xdr, 4);
2356 if (!p)
1da177e4 2357 goto out_resource;
c373b0a4 2358 *p++ = cpu_to_be32(1);
1da177e4
LT		 2359 }
2360 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2361 p = xdr_reserve_space(xdr, 8);
2362 if (!p)
1da177e4 2363 goto out_resource;
b64c7f3b 2364 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2365 }
2366 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2367 p = xdr_reserve_space(xdr, 4);
2368 if (!p)
1da177e4 2369 goto out_resource;
c373b0a4 2370 *p++ = cpu_to_be32(255);
1da177e4
LT		 2371 }
2372 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2373 p = xdr_reserve_space(xdr, 4);
2374 if (!p)
1da177e4 2375 goto out_resource;
c373b0a4 2376 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2377 }
2378 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2379 p = xdr_reserve_space(xdr, 8);
2380 if (!p)
1da177e4 2381 goto out_resource;
b64c7f3b 2382 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2383 }
2384 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2385 p = xdr_reserve_space(xdr, 8);
2386 if (!p)
1da177e4 2387 goto out_resource;
b64c7f3b 2388 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2389 }
2390 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2391 p = xdr_reserve_space(xdr, 4);
2392 if (!p)
1da177e4 2393 goto out_resource;
c373b0a4 2394 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2395 }
2396 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2397 p = xdr_reserve_space(xdr, 4);
2398 if (!p)
1da177e4 2399 goto out_resource;
c373b0a4 2400 *p++ = cpu_to_be32(1);
1da177e4
LT		 2401 }
2402 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2403 p = xdr_reserve_space(xdr, 4);
2404 if (!p)
1da177e4 2405 goto out_resource;
c373b0a4 2406 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2407 }
2408 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2409 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2410 if (status)
2411 goto out;
2412 }
2413 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2414 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2415 if (status)
2416 goto out;
2417 }
2418 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2419 p = xdr_reserve_space(xdr, 8);
2420 if (!p)
1da177e4 2421 goto out_resource;
c373b0a4
BF		 2422 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2423 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2424 }
2425 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2426 p = xdr_reserve_space(xdr, 8);
2427 if (!p)
1da177e4
LT		 2428 goto out_resource;
2429 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2430 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2431 }
2432 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2433 p = xdr_reserve_space(xdr, 8);
2434 if (!p)
1da177e4
LT		 2435 goto out_resource;
2436 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2437 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2438 }
2439 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2440 p = xdr_reserve_space(xdr, 8);
2441 if (!p)
1da177e4
LT		 2442 goto out_resource;
2443 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2444 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2445 }
2446 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2447 p = xdr_reserve_space(xdr, 8);
2448 if (!p)
1da177e4
LT		 2449 goto out_resource;
2450 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2451 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2452 }
2453 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2454 p = xdr_reserve_space(xdr, 12);
2455 if (!p)
1da177e4 2456 goto out_resource;
b64c7f3b 2457 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2458 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2459 }
2460 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2461 p = xdr_reserve_space(xdr, 12);
2462 if (!p)
1da177e4 2463 goto out_resource;
c373b0a4
BF		 2464 *p++ = cpu_to_be32(0);
2465 *p++ = cpu_to_be32(1);
2466 *p++ = cpu_to_be32(0);
1da177e4
LT		 2467 }
2468 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2469 p = xdr_reserve_space(xdr, 12);
2470 if (!p)
1da177e4 2471 goto out_resource;
b64c7f3b 2472 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2473 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2474 }
2475 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2476 p = xdr_reserve_space(xdr, 12);
2477 if (!p)
1da177e4 2478 goto out_resource;
b64c7f3b 2479 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2480 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2481 }
2482 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2483 p = xdr_reserve_space(xdr, 8);
2484 if (!p)
1da177e4 2485 goto out_resource;
406a7ea9
FF		 2486 /*
2487 * Get parent's attributes if not ignoring crossmount
2488 * and this is the root of a cross-mounted filesystem.
2489 */
2490 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2491 dentry == exp->ex_path.mnt->mnt_root)
2492 get_parent_attributes(exp, &stat);
b64c7f3b 2493 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2494 }
18032ca0 2495 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2496 status = nfsd4_encode_security_label(xdr, rqstp, context,
2497 contextlen);
18032ca0
DQ		 2498 if (status)
2499 goto out;
2500 }
8c18f205 2501 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2502 p = xdr_reserve_space(xdr, 16);
2503 if (!p)
de3997a7 2504 goto out_resource;
c373b0a4
BF		 2505 *p++ = cpu_to_be32(3);
2506 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2507 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2508 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2509 }
7e705706 2510
082d4bd7
BF		 2511 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2512 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2513 status = nfs_ok;
2514
2515out:
ba4e55bb 2516#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2517 if (context)
2518 security_release_secctx(context, contextlen);
ba4e55bb 2519#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2520 kfree(acl);
18df11d0 2521 if (tempfh) {
d50e6136 2522 fh_put(tempfh);
18df11d0
YZ		 2523 kfree(tempfh);
2524 }
1fcea5b2
BF		 2525 if (status)
2526 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2527 return status;
2528out_nfserr:
b8dd7b9a 2529 status = nfserrno(err);
1da177e4
LT		 2530 goto out;
2531out_resource:
1da177e4
LT		 2532 status = nfserr_resource;
2533 goto out;
1da177e4
LT		 2534}
2535
2825a7f9
BF		 2536static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2537 struct xdr_buf *buf, __be32 *p, int bytes)
2538{
2539 xdr->scratch.iov_len = 0;
2540 memset(buf, 0, sizeof(struct xdr_buf));
2541 buf->head[0].iov_base = p;
2542 buf->head[0].iov_len = 0;
2543 buf->len = 0;
2544 xdr->buf = buf;
2545 xdr->iov = buf->head;
2546 xdr->p = p;
2547 xdr->end = (void *)p + bytes;
2548 buf->buflen = bytes;
2549}
2550
d5184658
BF		 2551__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2552 struct svc_fh *fhp, struct svc_export *exp,
2553 struct dentry *dentry, u32 *bmval,
2554 struct svc_rqst *rqstp, int ignore_crossmnt)
2555{
2825a7f9 2556 struct xdr_buf dummy;
d5184658
BF		 2557 struct xdr_stream xdr;
2558 __be32 ret;
2559
2825a7f9 2560 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2561 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2562 ignore_crossmnt);
2563 *p = xdr.p;
2564 return ret;
2565}
2566
c0ce6ec8
BF		 2567static inline int attributes_need_mount(u32 *bmval)
2568{
2569 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2570 return 1;
2571 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2572 return 1;
2573 return 0;
2574}
2575
b37ad28b 2576static __be32
561f0ed4
BF		 2577nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2578 const char *name, int namlen)
1da177e4
LT		 2579{
2580 struct svc_export *exp = cd->rd_fhp->fh_export;
2581 struct dentry *dentry;
b37ad28b 2582 __be32 nfserr;
406a7ea9 2583 int ignore_crossmnt = 0;
1da177e4
LT		 2584
2585 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2586 if (IS_ERR(dentry))
2587 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2588 if (!dentry->d_inode) {
2589 /*
2590 * nfsd_buffered_readdir drops the i_mutex between
2591 * readdir and calling this callback, leaving a window
2592 * where this directory entry could have gone away.
2593 */
2594 dput(dentry);
2595 return nfserr_noent;
2596 }
1da177e4
LT		 2597
2598 exp_get(exp);
406a7ea9
FF		 2599 /*
2600 * In the case of a mountpoint, the client may be asking for
2601 * attributes that are only properties of the underlying filesystem
2602 * as opposed to the cross-mounted file system. In such a case,
2603 * we will not follow the cross mount and will fill the attribtutes
2604 * directly from the mountpoint dentry.
2605 */
3227fa41 2606 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2607 int err;
2608
3227fa41
BF		 2609 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2610 && !attributes_need_mount(cd->rd_bmval)) {
2611 ignore_crossmnt = 1;
2612 goto out_encode;
2613 }
dcb488a3
AA		 2614 /*
2615 * Why the heck aren't we just using nfsd_lookup??
2616 * Different "."/".." handling? Something else?
2617 * At least, add a comment here to explain....
2618 */
021d3a72
BF		 2619 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2620 if (err) {
2621 nfserr = nfserrno(err);
1da177e4
LT		 2622 goto out_put;
2623 }
dcb488a3
AA		 2624 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2625 if (nfserr)
2626 goto out_put;
1da177e4
LT		 2627
2628 }
3227fa41 2629out_encode:
561f0ed4 2630 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2631 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2632out_put:
2633 dput(dentry);
2634 exp_put(exp);
2635 return nfserr;
2636}
2637
2ebbc012 2638static __be32 *
561f0ed4 2639nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2640{
561f0ed4
BF		 2641 __be32 *p;
2642
2643 p = xdr_reserve_space(xdr, 6);
2644 if (!p)
1da177e4
LT		 2645 return NULL;
2646 *p++ = htonl(2);
2647 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2648 *p++ = htonl(0); /* bmval1 */
2649
87915c64 2650 *p++ = htonl(4); /* attribute length */
1da177e4 2651 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2652 return p;
2653}
2654
2655static int
a0ad13ef
N		 2656nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2657 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2658{
a0ad13ef 2659 struct readdir_cd *ccd = ccdv;
1da177e4 2660 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2661 struct xdr_stream *xdr = cd->xdr;
2662 int start_offset = xdr->buf->len;
2663 int cookie_offset;
2664 int entry_bytes;
b37ad28b 2665 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2666 __be64 wire_offset;
2667 __be32 *p;
1da177e4
LT		 2668
2669 /* In nfsv4, "." and ".." never make it onto the wire.. */
2670 if (name && isdotent(name, namlen)) {
2671 cd->common.err = nfs_ok;
2672 return 0;
2673 }
2674
561f0ed4
BF		 2675 if (cd->cookie_offset) {
2676 wire_offset = cpu_to_be64(offset);
2677 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2678 &wire_offset, 8);
2679 }
1da177e4 2680
561f0ed4
BF		 2681 p = xdr_reserve_space(xdr, 4);
2682 if (!p)
1da177e4 2683 goto fail;
1da177e4 2684 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2685 cookie_offset = xdr->buf->len;
2686 p = xdr_reserve_space(xdr, 3*4 + namlen);
2687 if (!p)
2688 goto fail;
1da177e4
LT		 2689 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2690 p = xdr_encode_array(p, name, namlen); /* name length & name */
2691
561f0ed4 2692 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2693 switch (nfserr) {
2694 case nfs_ok:
1da177e4
LT		 2695 break;
2696 case nfserr_resource:
2697 nfserr = nfserr_toosmall;
2698 goto fail;
b2c0cea6 2699 case nfserr_noent:
f41c5ad2 2700 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2701 goto skip_entry;
1da177e4
LT		 2702 default:
2703 /*
2704 * If the client requested the RDATTR_ERROR attribute,
2705 * we stuff the error code into this attribute
2706 * and continue. If this attribute was not requested,
2707 * then in accordance with the spec, we fail the
2708 * entire READDIR operation(!)
2709 */
2710 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2711 goto fail;
561f0ed4 2712 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2713 if (p == NULL) {
2714 nfserr = nfserr_toosmall;
1da177e4 2715 goto fail;
34081efc 2716 }
1da177e4 2717 }
561f0ed4
BF		 2718 nfserr = nfserr_toosmall;
2719 entry_bytes = xdr->buf->len - start_offset;
2720 if (entry_bytes > cd->rd_maxcount)
2721 goto fail;
2722 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2723 if (!cd->rd_dircount)
2724 goto fail;
2725 cd->rd_dircount--;
561f0ed4 2726 cd->cookie_offset = cookie_offset;
b2c0cea6 2727skip_entry:
1da177e4
LT		 2728 cd->common.err = nfs_ok;
2729 return 0;
2730fail:
561f0ed4 2731 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2732 cd->common.err = nfserr;
2733 return -EINVAL;
2734}
2735
d0a381dd
BF		 2736static __be32
2737nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2738{
bc749ca4 2739 __be32 *p;
e2f282b9 2740
d0a381dd
BF		 2741 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2742 if (!p)
2743 return nfserr_resource;
c373b0a4 2744 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2745 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2746 sizeof(stateid_opaque_t));
d0a381dd 2747 return 0;
e2f282b9
BH		 2748}
2749
695e12f8 2750static __be32
b37ad28b 2751nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2752{
d0a381dd 2753 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2754 __be32 *p;
1da177e4
LT		 2755
2756 if (!nfserr) {
d0a381dd
BF		 2757 p = xdr_reserve_space(xdr, 8);
2758 if (!p)
2759 return nfserr_resource;
c373b0a4
BF		 2760 *p++ = cpu_to_be32(access->ac_supported);
2761 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2762 }
695e12f8 2763 return nfserr;
1da177e4
LT		 2764}
2765
1d1bc8f2
BF		 2766static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2767{
d0a381dd 2768 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2769 __be32 *p;
2770
2771 if (!nfserr) {
d0a381dd
BF		 2772 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2773 if (!p)
2774 return nfserr_resource;
0c0c267b
BF		 2775 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2776 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2777 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2778 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2779 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2780 }
2781 return nfserr;
2782}
2783
695e12f8 2784static __be32
b37ad28b 2785nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2786{
d0a381dd
BF		 2787 struct xdr_stream *xdr = &resp->xdr;
2788
e2f282b9 2789 if (!nfserr)
d0a381dd 2790 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2791
695e12f8 2792 return nfserr;
1da177e4
LT		 2793}
2794
2795
695e12f8 2796static __be32
b37ad28b 2797nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2798{
d0a381dd 2799 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2800 __be32 *p;
1da177e4
LT		 2801
2802 if (!nfserr) {
d0a381dd
BF		 2803 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2804 if (!p)
2805 return nfserr_resource;
0c0c267b
BF		 2806 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2807 NFS4_VERIFIER_SIZE);
1da177e4 2808 }
695e12f8 2809 return nfserr;
1da177e4
LT		 2810}
2811
695e12f8 2812static __be32
b37ad28b 2813nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2814{
d0a381dd 2815 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2816 __be32 *p;
1da177e4
LT		 2817
2818 if (!nfserr) {
d0a381dd
BF		 2819 p = xdr_reserve_space(xdr, 32);
2820 if (!p)
2821 return nfserr_resource;
d05d5744 2822 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2823 *p++ = cpu_to_be32(2);
2824 *p++ = cpu_to_be32(create->cr_bmval[0]);
2825 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2826 }
695e12f8 2827 return nfserr;
1da177e4
LT		 2828}
2829
b37ad28b
AV		 2830static __be32
2831nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2832{
2833 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2834 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2835
2836 if (nfserr)
2837 return nfserr;
2838
d5184658
BF		 2839 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2840 getattr->ga_bmval,
406a7ea9 2841 resp->rqstp, 0);
1da177e4
LT		 2842 return nfserr;
2843}
2844
695e12f8
BH		 2845static __be32
2846nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2847{
d0a381dd 2848 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2849 struct svc_fh *fhp = *fhpp;
1da177e4 2850 unsigned int len;
bc749ca4 2851 __be32 *p;
1da177e4
LT		 2852
2853 if (!nfserr) {
2854 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2855 p = xdr_reserve_space(xdr, len + 4);
2856 if (!p)
2857 return nfserr_resource;
0c0c267b 2858 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2859 }
695e12f8 2860 return nfserr;
1da177e4
LT		 2861}
2862
2863/*
2864* Including all fields other than the name, a LOCK4denied structure requires
2865* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2866*/
d0a381dd
BF		 2867static __be32
2868nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2869{
7c13f344 2870 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2871 __be32 *p;
1da177e4 2872
8c7424cf 2873again:
d0a381dd 2874 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2875 if (!p) {
2876 /*
2877 * Don't fail to return the result just because we can't
2878 * return the conflicting open:
2879 */
2880 if (conf->len) {
2881 conf->len = 0;
2882 conf->data = NULL;
2883 goto again;
2884 }
d0a381dd 2885 return nfserr_resource;
8c7424cf 2886 }
b64c7f3b
BF		 2887 p = xdr_encode_hyper(p, ld->ld_start);
2888 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2889 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2890 if (conf->len) {
0c0c267b
BF		 2891 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2892 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2893 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2894 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2895 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2896 }
d0a381dd 2897 return nfserr_denied;
1da177e4
LT		 2898}
2899
695e12f8 2900static __be32
b37ad28b 2901nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2902{
d0a381dd
BF		 2903 struct xdr_stream *xdr = &resp->xdr;
2904
e2f282b9 2905 if (!nfserr)
d0a381dd 2906 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2907 else if (nfserr == nfserr_denied)
d0a381dd 2908 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2909 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2910 return nfserr;
1da177e4
LT		 2911}
2912
695e12f8 2913static __be32
b37ad28b 2914nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2915{
d0a381dd
BF		 2916 struct xdr_stream *xdr = &resp->xdr;
2917
1da177e4 2918 if (nfserr == nfserr_denied)
d0a381dd 2919 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2920 return nfserr;
1da177e4
LT		 2921}
2922
695e12f8 2923static __be32
b37ad28b 2924nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2925{
d0a381dd
BF		 2926 struct xdr_stream *xdr = &resp->xdr;
2927
e2f282b9 2928 if (!nfserr)
d0a381dd 2929 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2930
695e12f8 2931 return nfserr;
1da177e4
LT		 2932}
2933
2934
695e12f8 2935static __be32
b37ad28b 2936nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2937{
d0a381dd 2938 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2939 __be32 *p;
1da177e4
LT		 2940
2941 if (!nfserr) {
d0a381dd
BF		 2942 p = xdr_reserve_space(xdr, 20);
2943 if (!p)
2944 return nfserr_resource;
d05d5744 2945 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2946 }
695e12f8 2947 return nfserr;
1da177e4
LT		 2948}
2949
2950
695e12f8 2951static __be32
b37ad28b 2952nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2953{
d0a381dd 2954 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2955 __be32 *p;
1da177e4
LT		 2956
2957 if (nfserr)
2958 goto out;
2959
d0a381dd
BF		 2960 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2961 if (nfserr)
2962 goto out;
2963 p = xdr_reserve_space(xdr, 40);
2964 if (!p)
2965 return nfserr_resource;
d05d5744 2966 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2967 *p++ = cpu_to_be32(open->op_rflags);
2968 *p++ = cpu_to_be32(2);
2969 *p++ = cpu_to_be32(open->op_bmval[0]);
2970 *p++ = cpu_to_be32(open->op_bmval[1]);
2971 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2972
2973 switch (open->op_delegate_type) {
2974 case NFS4_OPEN_DELEGATE_NONE:
2975 break;
2976 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2977 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2978 if (nfserr)
2979 return nfserr;
2980 p = xdr_reserve_space(xdr, 20);
2981 if (!p)
2982 return nfserr_resource;
c373b0a4 2983 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2984
2985 /*
2986 * TODO: ACE's in delegations
2987 */
c373b0a4
BF		 2988 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2989 *p++ = cpu_to_be32(0);
2990 *p++ = cpu_to_be32(0);
2991 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2992 break;
2993 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2994 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2995 if (nfserr)
2996 return nfserr;
2997 p = xdr_reserve_space(xdr, 32);
2998 if (!p)
2999 return nfserr_resource;
c373b0a4 3000 *p++ = cpu_to_be32(0);
1da177e4
LT		 3001
3002 /*
3003 * TODO: space_limit's in delegations
3004 */
c373b0a4
BF		 3005 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3006 *p++ = cpu_to_be32(~(u32)0);
3007 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3008
3009 /*
3010 * TODO: ACE's in delegations
3011 */
c373b0a4
BF		 3012 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3013 *p++ = cpu_to_be32(0);
3014 *p++ = cpu_to_be32(0);
3015 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3016 break;
d24433cd
BH		 3017 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3018 switch (open->op_why_no_deleg) {
3019 case WND4_CONTENTION:
3020 case WND4_RESOURCE:
d0a381dd
BF		 3021 p = xdr_reserve_space(xdr, 8);
3022 if (!p)
3023 return nfserr_resource;
c373b0a4
BF		 3024 *p++ = cpu_to_be32(open->op_why_no_deleg);
3025 /* deleg signaling not supported yet: */
3026 *p++ = cpu_to_be32(0);
d24433cd
BH		 3027 break;
3028 default:
d0a381dd
BF		 3029 p = xdr_reserve_space(xdr, 4);
3030 if (!p)
3031 return nfserr_resource;
c373b0a4 3032 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3033 }
d24433cd 3034 break;
1da177e4
LT		 3035 default:
3036 BUG();
3037 }
3038 /* XXX save filehandle here */
3039out:
695e12f8 3040 return nfserr;
1da177e4
LT		 3041}
3042
695e12f8 3043static __be32
b37ad28b 3044nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3045{
d0a381dd
BF		 3046 struct xdr_stream *xdr = &resp->xdr;
3047
e2f282b9 3048 if (!nfserr)
d0a381dd 3049 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3050
695e12f8 3051 return nfserr;
1da177e4
LT		 3052}
3053
695e12f8 3054static __be32
b37ad28b 3055nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3056{
d0a381dd
BF		 3057 struct xdr_stream *xdr = &resp->xdr;
3058
e2f282b9 3059 if (!nfserr)
d0a381dd 3060 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3061
695e12f8 3062 return nfserr;
1da177e4
LT		 3063}
3064
dc97618d
BF		 3065static __be32 nfsd4_encode_splice_read(
3066 struct nfsd4_compoundres *resp,
3067 struct nfsd4_read *read,
3068 struct file *file, unsigned long maxcount)
1da177e4 3069{
ddd1ea56 3070 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3071 struct xdr_buf *buf = xdr->buf;
dc97618d 3072 u32 eof;
30596768 3073 int space_left;
dc97618d 3074 __be32 nfserr;
fec25fa4 3075 __be32 *p = xdr->p - 2;
1da177e4 3076
dc97618d
BF		 3077 /*
3078 * Don't inline pages unless we know there's room for eof,
3079 * count, and possible padding:
3080 */
3081 if (xdr->end - xdr->p < 3)
d0a381dd 3082 return nfserr_resource;
dc97618d
BF		 3083
3084 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3085 read->rd_offset, &maxcount);
3086 if (nfserr) {
3087 /*
3088 * nfsd_splice_actor may have already messed with the
3089 * page length; reset it so as not to confuse
3090 * xdr_truncate_encode:
3091 */
34a78b48 3092 buf->page_len = 0;
dc97618d 3093 return nfserr;
b0e35fda 3094 }
1da177e4 3095
dc97618d
BF		 3096 eof = (read->rd_offset + maxcount >=
3097 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3098
fec25fa4
BF		 3099 *(p++) = htonl(eof);
3100 *(p++) = htonl(maxcount);
dc97618d 3101
34a78b48
BF		 3102 buf->page_len = maxcount;
3103 buf->len += maxcount;
dc97618d 3104 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3105
3106 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3107 buf->tail[0].iov_base = xdr->p;
3108 buf->tail[0].iov_len = 0;
fec25fa4 3109 xdr->iov = buf->tail;
dc97618d 3110 if (maxcount&3) {
fec25fa4
BF		 3111 int pad = 4 - (maxcount&3);
3112
3113 *(xdr->p++) = 0;
3114
34a78b48 3115 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3116 buf->tail[0].iov_len = pad;
3117 buf->len += pad;
b0e35fda 3118 }
2825a7f9 3119
dc97618d 3120 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3121 buf->buflen - buf->len);
3122 buf->buflen = buf->len + space_left;
dc97618d
BF		 3123 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3124
3125 return 0;
3126}
3127
3128static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3129 struct nfsd4_read *read,
3130 struct file *file, unsigned long maxcount)
3131{
3132 struct xdr_stream *xdr = &resp->xdr;
3133 u32 eof;
3134 int v;
dc97618d 3135 int starting_len = xdr->buf->len - 8;
dc97618d 3136 long len;
b0420980 3137 int thislen;
dc97618d
BF		 3138 __be32 nfserr;
3139 __be32 tmp;
3140 __be32 *p;
b0420980
BF		 3141 u32 zzz = 0;
3142 int pad;
1da177e4
LT		 3143
3144 len = maxcount;
3145 v = 0;
6ff9897d 3146
3c7aa15d 3147 thislen = min(len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3148 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3149 WARN_ON_ONCE(!p);
3150 resp->rqstp->rq_vec[v].iov_base = p;
3151 resp->rqstp->rq_vec[v].iov_len = thislen;
3152 v++;
3153 len -= thislen;
3154
3155 while (len) {
6ff9897d 3156 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3157 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3158 WARN_ON_ONCE(!p);
3159 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3160 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3161 v++;
6ff9897d 3162 len -= thislen;
1da177e4
LT		 3163 }
3164 read->rd_vlen = v;
3165
dc97618d
BF		 3166 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3167 read->rd_vlen, &maxcount);
3168 if (nfserr)
1da177e4 3169 return nfserr;
b0420980 3170 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3171
44524359
N		 3172 eof = (read->rd_offset + maxcount >=
3173 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3174
dc97618d
BF		 3175 tmp = htonl(eof);
3176 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3177 tmp = htonl(maxcount);
3178 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3179
b0420980
BF		 3180 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3181 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3182 &zzz, pad);
1da177e4 3183 return 0;
dc97618d
BF		 3184
3185}
3186
3187static __be32
3188nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3189 struct nfsd4_read *read)
3190{
3191 unsigned long maxcount;
3192 struct xdr_stream *xdr = &resp->xdr;
3193 struct file *file = read->rd_filp;
3194 int starting_len = xdr->buf->len;
3195 struct raparms *ra;
3196 __be32 *p;
3197 __be32 err;
3198
3199 if (nfserr)
3200 return nfserr;
3201
3202 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3203 if (!p) {
3204 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3205 return nfserr_resource;
3206 }
b0420980
BF		 3207 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3208 WARN_ON_ONCE(1);
dc97618d
BF		 3209 return nfserr_resource;
3210 }
dc97618d
BF		 3211 xdr_commit_encode(xdr);
3212
3213 maxcount = svc_max_payload(resp->rqstp);
3c7aa15d
KM		 3214 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3215 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d
BF		 3216
3217 if (!read->rd_filp) {
3218 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3219 &file, &ra);
3220 if (err)
3221 goto err_truncate;
3222 }
3223
3224 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3225 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3226 else
3227 err = nfsd4_encode_readv(resp, read, file, maxcount);
3228
3229 if (!read->rd_filp)
3230 nfsd_put_tmp_read_open(file, ra);
3231
3232err_truncate:
3233 if (err)
3234 xdr_truncate_encode(xdr, starting_len);
3235 return err;
1da177e4
LT		 3236}
3237
b37ad28b
AV		 3238static __be32
3239nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3240{
3241 int maxcount;
476a7b1f
BF		 3242 __be32 wire_count;
3243 int zero = 0;
ddd1ea56 3244 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3245 int length_offset = xdr->buf->len;
bc749ca4 3246 __be32 *p;
1da177e4
LT		 3247
3248 if (nfserr)
3249 return nfserr;
2825a7f9
BF		 3250
3251 p = xdr_reserve_space(xdr, 4);
3252 if (!p)
3253 return nfserr_resource;
1da177e4 3254 maxcount = PAGE_SIZE;
d0a381dd 3255
476a7b1f
BF		 3256 p = xdr_reserve_space(xdr, maxcount);
3257 if (!p)
4e21ac4b 3258 return nfserr_resource;
1da177e4
LT		 3259 /*
3260 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3261 * if they would overflow the buffer. Is this kosher in NFSv4? If
3262 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3263 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3264 */
476a7b1f
BF		 3265 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3266 (char *)p, &maxcount);
1da177e4 3267 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3268 nfserr = nfserr_inval;
3269 if (nfserr) {
1fcea5b2 3270 xdr_truncate_encode(xdr, length_offset);
1da177e4 3271 return nfserr;
d3f627c8 3272 }
1da177e4 3273
476a7b1f
BF		 3274 wire_count = htonl(maxcount);
3275 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3276 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3277 if (maxcount & 3)
3278 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3279 &zero, 4 - (maxcount&3));
1da177e4
LT		 3280 return 0;
3281}
3282
b37ad28b
AV		 3283static __be32
3284nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3285{
3286 int maxcount;
561f0ed4 3287 int bytes_left;
1da177e4 3288 loff_t offset;
561f0ed4 3289 __be64 wire_offset;
ddd1ea56 3290 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3291 int starting_len = xdr->buf->len;
bc749ca4 3292 __be32 *p;
1da177e4
LT		 3293
3294 if (nfserr)
3295 return nfserr;
1da177e4 3296
d0a381dd
BF		 3297 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3298 if (!p)
3299 return nfserr_resource;
1da177e4
LT		 3300
3301 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3302 *p++ = cpu_to_be32(0);
3303 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3304 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3305 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3306
3307 /*
561f0ed4
BF		 3308 * Number of bytes left for directory entries allowing for the
3309 * final 8 bytes of the readdir and a following failed op:
3310 */
3311 bytes_left = xdr->buf->buflen - xdr->buf->len
3312 - COMPOUND_ERR_SLACK_SPACE - 8;
3313 if (bytes_left < 0) {
3314 nfserr = nfserr_resource;
3315 goto err_no_verf;
3316 }
3317 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3318 /*
3319 * Note the rfc defines rd_maxcount as the size of the
3320 * READDIR4resok structure, which includes the verifier above
3321 * and the 8 bytes encoded at the end of this function:
1da177e4 3322 */
561f0ed4
BF		 3323 if (maxcount < 16) {
3324 nfserr = nfserr_toosmall;
1da177e4
LT		 3325 goto err_no_verf;
3326 }
561f0ed4 3327 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3328
561f0ed4
BF		 3329 readdir->xdr = xdr;
3330 readdir->rd_maxcount = maxcount;
1da177e4 3331 readdir->common.err = 0;
561f0ed4 3332 readdir->cookie_offset = 0;
1da177e4
LT		 3333
3334 offset = readdir->rd_cookie;
3335 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3336 &offset,
3337 &readdir->common, nfsd4_encode_dirent);
3338 if (nfserr == nfs_ok &&
3339 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3340 xdr->buf->len == starting_len + 8) {
3341 /* nothing encoded; which limit did we hit?: */
3342 if (maxcount - 16 < bytes_left)
3343 /* It was the fault of rd_maxcount: */
3344 nfserr = nfserr_toosmall;
3345 else
3346 /* We ran out of buffer space: */
3347 nfserr = nfserr_resource;
3348 }
1da177e4
LT		 3349 if (nfserr)
3350 goto err_no_verf;
3351
561f0ed4
BF		 3352 if (readdir->cookie_offset) {
3353 wire_offset = cpu_to_be64(offset);
3354 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3355 &wire_offset, 8);
3356 }
1da177e4 3357
561f0ed4
BF		 3358 p = xdr_reserve_space(xdr, 8);
3359 if (!p) {
3360 WARN_ON_ONCE(1);
3361 goto err_no_verf;
3362 }
1da177e4
LT		 3363 *p++ = 0; /* no more entries */
3364 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3365
3366 return 0;
3367err_no_verf:
1fcea5b2 3368 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3369 return nfserr;
3370}
3371
695e12f8 3372static __be32
b37ad28b 3373nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3374{
d0a381dd 3375 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3376 __be32 *p;
1da177e4
LT		 3377
3378 if (!nfserr) {
d0a381dd
BF		 3379 p = xdr_reserve_space(xdr, 20);
3380 if (!p)
3381 return nfserr_resource;
d05d5744 3382 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3383 }
695e12f8 3384 return nfserr;
1da177e4
LT		 3385}
3386
695e12f8 3387static __be32
b37ad28b 3388nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3389{
d0a381dd 3390 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3391 __be32 *p;
1da177e4
LT		 3392
3393 if (!nfserr) {
d0a381dd
BF		 3394 p = xdr_reserve_space(xdr, 40);
3395 if (!p)
3396 return nfserr_resource;
d05d5744
BF		 3397 p = encode_cinfo(p, &rename->rn_sinfo);
3398 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3399 }
695e12f8 3400 return nfserr;
1da177e4
LT		 3401}
3402
695e12f8 3403static __be32
d0a381dd 3404nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3405 __be32 nfserr, struct svc_export *exp)
dcb488a3 3406{
676e4ebd 3407 u32 i, nflavs, supported;
4796f457
BF		 3408 struct exp_flavor_info *flavs;
3409 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3410 __be32 *p, *flavorsp;
3411 static bool report = true;
dcb488a3
AA		 3412
3413 if (nfserr)
3414 goto out;
d0a381dd 3415 nfserr = nfserr_resource;
4796f457
BF		 3416 if (exp->ex_nflavors) {
3417 flavs = exp->ex_flavors;
3418 nflavs = exp->ex_nflavors;
3419 } else { /* Handling of some defaults in absence of real secinfo: */
3420 flavs = def_flavs;
3421 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3422 nflavs = 2;
3423 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3424 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3425 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3426 nflavs = 1;
3427 flavs[0].pseudoflavor
3428 = svcauth_gss_flavor(exp->ex_client);
3429 } else {
3430 nflavs = 1;
3431 flavs[0].pseudoflavor
3432 = exp->ex_client->flavour->flavour;
3433 }
3434 }
3435
676e4ebd 3436 supported = 0;
d0a381dd
BF		 3437 p = xdr_reserve_space(xdr, 4);
3438 if (!p)
3439 goto out;
676e4ebd 3440 flavorsp = p++; /* to be backfilled later */
676e4ebd 3441
4796f457 3442 for (i = 0; i < nflavs; i++) {
676e4ebd 3443 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3444 struct rpcsec_gss_info info;
dcb488a3 3445
676e4ebd
CL		 3446 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3447 supported++;
d0a381dd
BF		 3448 p = xdr_reserve_space(xdr, 4 + 4 +
3449 XDR_LEN(info.oid.len) + 4 + 4);
3450 if (!p)
3451 goto out;
c373b0a4 3452 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3453 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3454 *p++ = cpu_to_be32(info.qop);
3455 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3456 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3457 supported++;
d0a381dd
BF		 3458 p = xdr_reserve_space(xdr, 4);
3459 if (!p)
3460 goto out;
c373b0a4 3461 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3462 } else {
3463 if (report)
3464 pr_warn("NFS: SECINFO: security flavor %u "
3465 "is not supported\n", pf);
dcb488a3
AA		 3466 }
3467 }
a77c806f 3468
676e4ebd
CL		 3469 if (nflavs != supported)
3470 report = false;
3471 *flavorsp = htonl(supported);
d0a381dd 3472 nfserr = 0;
dcb488a3
AA		 3473out:
3474 if (exp)
3475 exp_put(exp);
695e12f8 3476 return nfserr;
dcb488a3
AA		 3477}
3478
22b6dee8
MJ		 3479static __be32
3480nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3481 struct nfsd4_secinfo *secinfo)
3482{
d0a381dd
BF		 3483 struct xdr_stream *xdr = &resp->xdr;
3484
3485 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3486}
3487
3488static __be32
3489nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3490 struct nfsd4_secinfo_no_name *secinfo)
3491{
d0a381dd
BF		 3492 struct xdr_stream *xdr = &resp->xdr;
3493
3494 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3495}
3496
1da177e4
LT		 3497/*
3498 * The SETATTR encode routine is special -- it always encodes a bitmap,
3499 * regardless of the error status.
3500 */
695e12f8 3501static __be32
b37ad28b 3502nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3503{
d0a381dd 3504 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3505 __be32 *p;
1da177e4 3506
d0a381dd
BF		 3507 p = xdr_reserve_space(xdr, 16);
3508 if (!p)
3509 return nfserr_resource;
1da177e4 3510 if (nfserr) {
c373b0a4
BF		 3511 *p++ = cpu_to_be32(3);
3512 *p++ = cpu_to_be32(0);
3513 *p++ = cpu_to_be32(0);
3514 *p++ = cpu_to_be32(0);
1da177e4
LT		 3515 }
3516 else {
c373b0a4
BF		 3517 *p++ = cpu_to_be32(3);
3518 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3519 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3520 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3521 }
695e12f8 3522 return nfserr;
1da177e4
LT		 3523}
3524
695e12f8 3525static __be32
b37ad28b 3526nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3527{
d0a381dd 3528 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3529 __be32 *p;
1da177e4
LT		 3530
3531 if (!nfserr) {
d0a381dd
BF		 3532 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3533 if (!p)
3534 return nfserr_resource;
0c0c267b
BF		 3535 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3536 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3537 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3538 }
3539 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3540 p = xdr_reserve_space(xdr, 8);
3541 if (!p)
3542 return nfserr_resource;
c373b0a4
BF		 3543 *p++ = cpu_to_be32(0);
3544 *p++ = cpu_to_be32(0);
1da177e4 3545 }
695e12f8 3546 return nfserr;
1da177e4
LT		 3547}
3548
695e12f8 3549static __be32
b37ad28b 3550nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3551{
d0a381dd 3552 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3553 __be32 *p;
1da177e4
LT		 3554
3555 if (!nfserr) {
d0a381dd
BF		 3556 p = xdr_reserve_space(xdr, 16);
3557 if (!p)
3558 return nfserr_resource;
c373b0a4
BF		 3559 *p++ = cpu_to_be32(write->wr_bytes_written);
3560 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3561 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3562 NFS4_VERIFIER_SIZE);
1da177e4 3563 }
695e12f8 3564 return nfserr;
1da177e4
LT		 3565}
3566
57266a6e
BF		 3567static const u32 nfs4_minimal_spo_must_enforce[2] = {
3568 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3569 1 << (OP_EXCHANGE_ID - 32) |
3570 1 << (OP_CREATE_SESSION - 32) |
3571 1 << (OP_DESTROY_SESSION - 32) |
3572 1 << (OP_DESTROY_CLIENTID - 32)
3573};
3574
2db134eb 3575static __be32
57b7b43b 3576nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3577 struct nfsd4_exchange_id *exid)
3578{
d0a381dd 3579 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3580 __be32 *p;
0733d213
AA		 3581 char *major_id;
3582 char *server_scope;
3583 int major_id_sz;
3584 int server_scope_sz;
3585 uint64_t minor_id = 0;
3586
3587 if (nfserr)
3588 return nfserr;
3589
3590 major_id = utsname()->nodename;
3591 major_id_sz = strlen(major_id);
3592 server_scope = utsname()->nodename;
3593 server_scope_sz = strlen(server_scope);
3594
d0a381dd 3595 p = xdr_reserve_space(xdr,
0733d213
AA		 3596 8 /* eir_clientid */ +
3597 4 /* eir_sequenceid */ +
3598 4 /* eir_flags */ +
a8bb84bc 3599 4 /* spr_how */);
d0a381dd
BF		 3600 if (!p)
3601 return nfserr_resource;
0733d213 3602
0c0c267b 3603 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3604 *p++ = cpu_to_be32(exid->seqid);
3605 *p++ = cpu_to_be32(exid->flags);
0733d213 3606
c373b0a4 3607 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3608
57266a6e
BF		 3609 switch (exid->spa_how) {
3610 case SP4_NONE:
3611 break;
3612 case SP4_MACH_CRED:
a8bb84bc 3613 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3614 p = xdr_reserve_space(xdr, 16);
3615 if (!p)
3616 return nfserr_resource;
a8bb84bc 3617
57266a6e 3618 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3619 *p++ = cpu_to_be32(2);
3620 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3621 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3622 /* empty spo_must_allow bitmap: */
c373b0a4 3623 *p++ = cpu_to_be32(0);
a8bb84bc 3624
57266a6e
BF		 3625 break;
3626 default:
3627 WARN_ON_ONCE(1);
3628 }
0733d213 3629
d0a381dd 3630 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3631 8 /* so_minor_id */ +
3632 4 /* so_major_id.len */ +
3633 (XDR_QUADLEN(major_id_sz) * 4) +
3634 4 /* eir_server_scope.len */ +
3635 (XDR_QUADLEN(server_scope_sz) * 4) +
3636 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3637 if (!p)
3638 return nfserr_resource;
a8bb84bc 3639
0733d213 3640 /* The server_owner struct */
b64c7f3b 3641 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3642 /* major id */
0c0c267b 3643 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3644
3645 /* Server scope */
0c0c267b 3646 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3647
3648 /* Implementation id */
c373b0a4 3649 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3650 return 0;
2db134eb
AA		 3651}
3652
3653static __be32
57b7b43b 3654nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3655 struct nfsd4_create_session *sess)
3656{
d0a381dd 3657 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3658 __be32 *p;
ec6b5d7b
AA		 3659
3660 if (nfserr)
3661 return nfserr;
3662
d0a381dd
BF		 3663 p = xdr_reserve_space(xdr, 24);
3664 if (!p)
3665 return nfserr_resource;
0c0c267b
BF		 3666 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3667 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3668 *p++ = cpu_to_be32(sess->seqid);
3669 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3670
d0a381dd
BF		 3671 p = xdr_reserve_space(xdr, 28);
3672 if (!p)
3673 return nfserr_resource;
c373b0a4
BF		 3674 *p++ = cpu_to_be32(0); /* headerpadsz */
3675 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3676 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3677 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3678 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3679 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3680 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3681
3682 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3683 p = xdr_reserve_space(xdr, 4);
3684 if (!p)
3685 return nfserr_resource;
c373b0a4 3686 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3687 }
3688
d0a381dd
BF		 3689 p = xdr_reserve_space(xdr, 28);
3690 if (!p)
3691 return nfserr_resource;
c373b0a4
BF		 3692 *p++ = cpu_to_be32(0); /* headerpadsz */
3693 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3694 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3695 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3696 *p++ = cpu_to_be32(sess->back_channel.maxops);
3697 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3698 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3699
3700 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3701 p = xdr_reserve_space(xdr, 4);
3702 if (!p)
3703 return nfserr_resource;
c373b0a4 3704 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3705 }
3706 return 0;
2db134eb
AA		 3707}
3708
c47d832b 3709static __be32
57b7b43b 3710nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3711 struct nfsd4_sequence *seq)
3712{
d0a381dd 3713 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3714 __be32 *p;
b85d4c01
BH		 3715
3716 if (nfserr)
3717 return nfserr;
3718
d0a381dd
BF		 3719 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3720 if (!p)
3721 return nfserr_resource;
0c0c267b
BF		 3722 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3723 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3724 *p++ = cpu_to_be32(seq->seqid);
3725 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3726 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3727 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3728 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3729 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3730
f5236013 3731 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3732 return 0;
2db134eb
AA		 3733}
3734
2355c596 3735static __be32
57b7b43b 3736nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3737 struct nfsd4_test_stateid *test_stateid)
3738{
d0a381dd 3739 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3740 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3741 __be32 *p;
17456804 3742
a11fcce1
BF		 3743 if (nfserr)
3744 return nfserr;
3745
d0a381dd
BF		 3746 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3747 if (!p)
3748 return nfserr_resource;
17456804 3749 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3750
03cfb420 3751 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3752 *p++ = stateid->ts_id_status;
17456804 3753 }
17456804
BS		 3754
3755 return nfserr;
3756}
3757
695e12f8
BH		 3758static __be32
3759nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3760{
3761 return nfserr;
3762}
3763
3764typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3765
2db134eb
AA		 3766/*
3767 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3768 * since we don't need to filter out obsolete ops as this is
3769 * done in the decoding phase.
3770 */
695e12f8 3771static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3772 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3773 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3774 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3775 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3776 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3777 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3778 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3779 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3780 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3781 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3782 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3783 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3784 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3785 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3786 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3787 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3788 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3789 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3790 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3791 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3792 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3793 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3794 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3795 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3796 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3797 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3798 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3799 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3800 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3801 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3802 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3803 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3804 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3805 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3806 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3807 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3808 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3809
3810 /* NFSv4.1 operations */
3811 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3812 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3813 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3814 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3815 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3817 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3818 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3819 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3820 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3821 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3822 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3823 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3824 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3825 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3826 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3827 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3828 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3829 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3830};
3831
496c262c 3832/*
a8095f7e
BF		 3833 * Calculate whether we still have space to encode repsize bytes.
3834 * There are two considerations:
3835 * - For NFS versions >=4.1, the size of the reply must stay within
3836 * session limits
3837 * - For all NFS versions, we must stay within limited preallocated
3838 * buffer space.
496c262c 3839 *
a8095f7e
BF		 3840 * This is called before the operation is processed, so can only provide
3841 * an upper estimate. For some nonidempotent operations (such as
3842 * getattr), it's not necessarily a problem if that estimate is wrong,
3843 * as we can fail it after processing without significant side effects.
496c262c 3844 */
a8095f7e 3845__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3846{
67492c99 3847 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3848 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3849
47ee5298
BF		 3850 if (buf->len + respsize <= buf->buflen)
3851 return nfs_ok;
3852 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3853 return nfserr_resource;
47ee5298
BF		 3854 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3855 WARN_ON_ONCE(1);
3856 return nfserr_rep_too_big_to_cache;
ea8d7720 3857 }
47ee5298 3858 return nfserr_rep_too_big;
496c262c
AA		 3859}
3860
1da177e4
LT		 3861void
3862nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3863{
082d4bd7 3864 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3865 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3866 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3867 int post_err_offset;
07d1f802 3868 nfsd4_enc encoder;
bc749ca4 3869 __be32 *p;
1da177e4 3870
d0a381dd
BF		 3871 p = xdr_reserve_space(xdr, 8);
3872 if (!p) {
3873 WARN_ON_ONCE(1);
3874 return;
3875 }
c373b0a4 3876 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3877 post_err_offset = xdr->buf->len;
1da177e4 3878
695e12f8
BH		 3879 if (op->opnum == OP_ILLEGAL)
3880 goto status;
3881 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3882 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3883 encoder = nfsd4_enc_ops[op->opnum];
3884 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3885 xdr_commit_encode(xdr);
3886
067e1ace 3887 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3888 if (!op->status) {
3889 int space_needed = 0;
3890 if (!nfsd4_last_compound_op(rqstp))
3891 space_needed = COMPOUND_ERR_SLACK_SPACE;
3892 op->status = nfsd4_check_resp_size(resp, space_needed);
3893 }
c8f13d97
BF		 3894 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3895 struct nfsd4_slot *slot = resp->cstate.slot;
3896
3897 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3898 op->status = nfserr_rep_too_big_to_cache;
3899 else
3900 op->status = nfserr_rep_too_big;
3901 }
07d1f802
BF		 3902 if (op->status == nfserr_resource ||
3903 op->status == nfserr_rep_too_big ||
3904 op->status == nfserr_rep_too_big_to_cache) {
3905 /*
3906 * The operation may have already been encoded or
3907 * partially encoded. No op returns anything additional
3908 * in the case of one of these three errors, so we can
3909 * just truncate back to after the status. But it's a
3910 * bug if we had to do this on a non-idempotent op:
3911 */
3912 warn_on_nonidempotent_op(op);
082d4bd7 3913 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3914 }
9411b1d4 3915 if (so) {
082d4bd7
BF		 3916 int len = xdr->buf->len - post_err_offset;
3917
9411b1d4 3918 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3919 so->so_replay.rp_buflen = len;
3920 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3921 so->so_replay.rp_buf, len);
9411b1d4 3922 }
695e12f8 3923status:
082d4bd7
BF		 3924 /* Note that op->status is already in network byte order: */
3925 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3926}
3927
3928/*
3929 * Encode the reply stored in the stateowner reply cache
3930 *
3931 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3932 * previously sent already encoded operation.
3933 *
3934 * called with nfs4_lock_state() held
3935 */
3936void
d0a381dd 3937nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3938{
bc749ca4 3939 __be32 *p;
1da177e4
LT		 3940 struct nfs4_replay *rp = op->replay;
3941
3942 BUG_ON(!rp);
3943
d0a381dd
BF		 3944 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3945 if (!p) {
3946 WARN_ON_ONCE(1);
3947 return;
3948 }
c373b0a4 3949 *p++ = cpu_to_be32(op->opnum);
1da177e4 3950 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3951
0c0c267b 3952 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3953}
3954
1da177e4 3955int
2ebbc012 3956nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3957{
3958 return xdr_ressize_check(rqstp, p);
3959}
3960
3e98abff 3961int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3962{
3e98abff
BF		 3963 struct svc_rqst *rqstp = rq;
3964 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3965
1da177e4
LT		 3966 if (args->ops != args->iops) {
3967 kfree(args->ops);
3968 args->ops = args->iops;
3969 }
f99d49ad
JJ		 3970 kfree(args->tmpp);
3971 args->tmpp = NULL;
1da177e4
LT		 3972 while (args->to_free) {
3973 struct tmpbuf *tb = args->to_free;
3974 args->to_free = tb->next;
3975 tb->release(tb->buf);
3976 kfree(tb);
3977 }
3e98abff 3978 return 1;
1da177e4
LT		 3979}
3980
3981int
2ebbc012 3982nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3983{
e874f9f8
JL		 3984 if (rqstp->rq_arg.head[0].iov_len % 4) {
3985 /* client is nuts */
3986 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3987 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3988 return 0;
3989 }
1da177e4
LT		 3990 args->p = p;
3991 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3992 args->pagelist = rqstp->rq_arg.pages;
3993 args->pagelen = rqstp->rq_arg.page_len;
3994 args->tmpp = NULL;
3995 args->to_free = NULL;
3996 args->ops = args->iops;
3997 args->rqstp = rqstp;
3998
3e98abff 3999 return !nfsd4_decode_compound(args);
1da177e4
LT		 4000}
4001
4002int
2ebbc012 4003nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4004{
4005 /*
4006 * All that remains is to write the tag and operation count...
4007 */
557ce264 4008 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4009 struct xdr_buf *buf = resp->xdr.buf;
4010
4011 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4012 buf->tail[0].iov_len);
dd97fdde 4013
2825a7f9
BF		 4014 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4015
1da177e4
LT		 4016 p = resp->tagp;
4017 *p++ = htonl(resp->taglen);
4018 memcpy(p, resp->tag, resp->taglen);
4019 p += XDR_QUADLEN(resp->taglen);
4020 *p++ = htonl(resp->opcnt);
4021
26c0c75e 4022 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4023 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4024 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4025 if (cs->status != nfserr_replay_cache) {
4026 nfsd4_store_cache_entry(resp);
73e79482 4027 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4028 }
d7682988 4029 /* Renew the clientid on success and on replay */
f0f51f5c 4030 spin_lock(&nn->client_lock);
221a6876 4031 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4032 spin_unlock(&nn->client_lock);
4033 put_client_renew(clp);
da3846a2 4034 }
1da177e4
LT		 4035 return 1;
4036}
4037
4038/*
4039 * Local variables:
4040 * c-basic-offset: 8
4041 * End:
4042 */
Linux 6.x block layer and io_uring tree(s)