]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - fs/nfsd/nfs4xdr.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfsd4: kill READ32
[mirror_ubuntu-artful-kernel.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
1da177e4
LT		 101#define READ64(x) do { \
102 (x) = (u64)ntohl(*p++) << 32; \
103 (x) |= ntohl(*p++); \
104} while (0)
1da177e4
LT		 105#define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
817cb9d4
CL		 113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
1da177e4
LT		 115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119#define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123
124/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125#define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
1da177e4
LT		 132 goto xdr_error; \
133 } \
134} while (0)
135
590b7431
BF		 136static void next_decode_page(struct nfsd4_compoundargs *argp)
137{
590b7431 138 argp->p = page_address(argp->pagelist[0]);
365da4ad 139 argp->pagelist++;
590b7431
BF		 140 if (argp->pagelen < PAGE_SIZE) {
141 argp->end = argp->p + (argp->pagelen>>2);
142 argp->pagelen = 0;
143 } else {
144 argp->end = argp->p + (PAGE_SIZE>>2);
145 argp->pagelen -= PAGE_SIZE;
146 }
147}
148
ca2a05aa 149static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 150{
151 /* We want more bytes than seem to be available.
152 * Maybe we need a new page, maybe we have just run out
153 */
ca2a05aa 154 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 155 __be32 *p;
1da177e4
LT		 156 if (avail + argp->pagelen < nbytes)
157 return NULL;
158 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
159 return NULL;
160 /* ok, we can do it with the current plus the next page */
161 if (nbytes <= sizeof(argp->tmp))
162 p = argp->tmp;
163 else {
f99d49ad 164 kfree(argp->tmpp);
1da177e4
LT		 165 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
166 if (!p)
167 return NULL;
168
169 }
ca2a05aa
BF		 170 /*
171 * The following memcpy is safe because read_buf is always
172 * called with nbytes > avail, and the two cases above both
173 * guarantee p points to at least nbytes bytes.
174 */
1da177e4 175 memcpy(p, argp->p, avail);
590b7431 176 next_decode_page(argp);
1da177e4
LT		 177 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
178 argp->p += XDR_QUADLEN(nbytes - avail);
179 return p;
180}
181
60adfc50
AA		 182static int zero_clientid(clientid_t *clid)
183{
184 return (clid->cl_boot == 0) && (clid->cl_id == 0);
185}
186
2d8498db
CH		 187/**
188 * defer_free - mark an allocation as deferred freed
189 * @argp: NFSv4 compound argument structure to be freed with
190 * @release: release callback to free @p, typically kfree()
191 * @p: pointer to be freed
192 *
193 * Marks @p to be freed when processing the compound operation
194 * described in @argp finishes.
195 */
1da177e4
LT		 196static int
197defer_free(struct nfsd4_compoundargs *argp,
198 void (*release)(const void *), void *p)
199{
200 struct tmpbuf *tb;
201
202 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
203 if (!tb)
204 return -ENOMEM;
205 tb->buf = p;
206 tb->release = release;
207 tb->next = argp->to_free;
208 argp->to_free = tb;
209 return 0;
210}
211
2d8498db
CH		 212/**
213 * savemem - duplicate a chunk of memory for later processing
214 * @argp: NFSv4 compound argument structure to be freed with
215 * @p: pointer to be duplicated
216 * @nbytes: length to be duplicated
217 *
218 * Returns a pointer to a copy of @nbytes bytes of memory at @p
219 * that are preserved until processing of the NFSv4 compound
220 * operation described by @argp finishes.
221 */
2ebbc012 222static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 223{
1da177e4 224 if (p == argp->tmp) {
67114fe6 225 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 226 if (!p)
227 return NULL;
1da177e4 228 } else {
73dff8be 229 BUG_ON(p != argp->tmpp);
1da177e4
LT		 230 argp->tmpp = NULL;
231 }
232 if (defer_free(argp, kfree, p)) {
a4db5fe5 233 kfree(p);
1da177e4
LT		 234 return NULL;
235 } else
236 return (char *)p;
237}
238
b37ad28b 239static __be32
1da177e4
LT		 240nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
241{
242 u32 bmlen;
243 DECODE_HEAD;
244
245 bmval[0] = 0;
246 bmval[1] = 0;
7e705706 247 bmval[2] = 0;
1da177e4
LT		 248
249 READ_BUF(4);
06553991 250 bmlen = be32_to_cpup(p++);
1da177e4
LT		 251 if (bmlen > 1000)
252 goto xdr_error;
253
254 READ_BUF(bmlen << 2);
255 if (bmlen > 0)
06553991 256 bmval[0] = be32_to_cpup(p++);
1da177e4 257 if (bmlen > 1)
06553991 258 bmval[1] = be32_to_cpup(p++);
7e705706 259 if (bmlen > 2)
06553991 260 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 261
262 DECODE_TAIL;
263}
264
b37ad28b 265static __be32
3c8e0316 266nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 267 struct iattr *iattr, struct nfs4_acl **acl,
268 struct xdr_netobj *label)
1da177e4
LT		 269{
270 int expected_len, len = 0;
271 u32 dummy32;
272 char *buf;
273
274 DECODE_HEAD;
275 iattr->ia_valid = 0;
276 if ((status = nfsd4_decode_bitmap(argp, bmval)))
277 return status;
278
1da177e4 279 READ_BUF(4);
06553991 280 expected_len = be32_to_cpup(p++);
1da177e4
LT		 281
282 if (bmval[0] & FATTR4_WORD0_SIZE) {
283 READ_BUF(8);
284 len += 8;
285 READ64(iattr->ia_size);
286 iattr->ia_valid |= ATTR_SIZE;
287 }
288 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 289 u32 nace;
28e05dd8 290 struct nfs4_ace *ace;
1da177e4
LT		 291
292 READ_BUF(4); len += 4;
06553991 293 nace = be32_to_cpup(p++);
1da177e4 294
28e05dd8 295 if (nace > NFS4_ACL_MAX)
798df338 296 return nfserr_fbig;
28e05dd8
BF		 297
298 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 299 if (*acl == NULL)
300 return nfserr_jukebox;
301
28e05dd8 302 defer_free(argp, kfree, *acl);
1da177e4 303
28e05dd8
BF		 304 (*acl)->naces = nace;
305 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 306 READ_BUF(16); len += 16;
06553991
BF		 307 ace->type = be32_to_cpup(p++);
308 ace->flag = be32_to_cpup(p++);
309 ace->access_mask = be32_to_cpup(p++);
310 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 311 READ_BUF(dummy32);
312 len += XDR_QUADLEN(dummy32) << 2;
313 READMEM(buf, dummy32);
28e05dd8 314 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 315 status = nfs_ok;
28e05dd8 316 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 317 ;
28e05dd8 318 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 319 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 320 buf, dummy32, &ace->who_gid);
1da177e4 321 else
3c726023 322 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 323 buf, dummy32, &ace->who_uid);
3c726023
BF		 324 if (status)
325 return status;
1da177e4
LT		 326 }
327 } else
328 *acl = NULL;
329 if (bmval[1] & FATTR4_WORD1_MODE) {
330 READ_BUF(4);
331 len += 4;
06553991 332 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 333 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
334 iattr->ia_valid |= ATTR_MODE;
335 }
336 if (bmval[1] & FATTR4_WORD1_OWNER) {
337 READ_BUF(4);
338 len += 4;
06553991 339 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 340 READ_BUF(dummy32);
341 len += (XDR_QUADLEN(dummy32) << 2);
342 READMEM(buf, dummy32);
47c85291
N		 343 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
344 return status;
1da177e4
LT		 345 iattr->ia_valid |= ATTR_UID;
346 }
347 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
348 READ_BUF(4);
349 len += 4;
06553991 350 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 351 READ_BUF(dummy32);
352 len += (XDR_QUADLEN(dummy32) << 2);
353 READMEM(buf, dummy32);
47c85291
N		 354 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
355 return status;
1da177e4
LT		 356 iattr->ia_valid |= ATTR_GID;
357 }
358 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
359 READ_BUF(4);
360 len += 4;
06553991 361 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 362 switch (dummy32) {
363 case NFS4_SET_TO_CLIENT_TIME:
364 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
365 all 32 bits of 'nseconds'. */
366 READ_BUF(12);
367 len += 12;
bf8d9097 368 READ64(iattr->ia_atime.tv_sec);
06553991 369 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 370 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
371 return nfserr_inval;
372 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
373 break;
374 case NFS4_SET_TO_SERVER_TIME:
375 iattr->ia_valid |= ATTR_ATIME;
376 break;
377 default:
378 goto xdr_error;
379 }
380 }
1da177e4
LT		 381 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
382 READ_BUF(4);
383 len += 4;
06553991 384 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 385 switch (dummy32) {
386 case NFS4_SET_TO_CLIENT_TIME:
387 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
388 all 32 bits of 'nseconds'. */
389 READ_BUF(12);
390 len += 12;
bf8d9097 391 READ64(iattr->ia_mtime.tv_sec);
06553991 392 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 393 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
394 return nfserr_inval;
395 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
396 break;
397 case NFS4_SET_TO_SERVER_TIME:
398 iattr->ia_valid |= ATTR_MTIME;
399 break;
400 default:
401 goto xdr_error;
402 }
403 }
18032ca0
DQ		 404
405 label->len = 0;
406#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
407 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
408 READ_BUF(4);
409 len += 4;
06553991 410 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 411 READ_BUF(4);
412 len += 4;
06553991 413 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 414 READ_BUF(4);
415 len += 4;
06553991 416 dummy32 = be32_to_cpup(p++);
18032ca0
DQ		 417 READ_BUF(dummy32);
418 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
419 return nfserr_badlabel;
420 len += (XDR_QUADLEN(dummy32) << 2);
421 READMEM(buf, dummy32);
422 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
423 if (!label->data)
424 return nfserr_jukebox;
3378b7f4 425 label->len = dummy32;
18032ca0
DQ		 426 defer_free(argp, kfree, label->data);
427 memcpy(label->data, buf, dummy32);
428 }
429#endif
430
3c8e0316
YZ		 431 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
432 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
433 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
434 READ_BUF(expected_len - len);
435 else if (len != expected_len)
1da177e4
LT		 436 goto xdr_error;
437
438 DECODE_TAIL;
1da177e4
LT		 439}
440
e31a1b66
BH		 441static __be32
442nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
443{
444 DECODE_HEAD;
445
446 READ_BUF(sizeof(stateid_t));
06553991 447 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 448 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
449
450 DECODE_TAIL;
451}
452
b37ad28b 453static __be32
1da177e4
LT		 454nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
455{
456 DECODE_HEAD;
457
458 READ_BUF(4);
06553991 459 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 460
461 DECODE_TAIL;
462}
463
acb2887e
BF		 464static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
465{
466 DECODE_HEAD;
12fc3e92 467 u32 dummy, uid, gid;
acb2887e
BF		 468 char *machine_name;
469 int i;
470 int nr_secflavs;
471
472 /* callback_sec_params4 */
473 READ_BUF(4);
06553991 474 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 475 if (nr_secflavs)
476 cbs->flavor = (u32)(-1);
477 else
478 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
479 cbs->flavor = 0;
acb2887e
BF		 480 for (i = 0; i < nr_secflavs; ++i) {
481 READ_BUF(4);
06553991 482 dummy = be32_to_cpup(p++);
acb2887e
BF		 483 switch (dummy) {
484 case RPC_AUTH_NULL:
485 /* Nothing to read */
12fc3e92
BF		 486 if (cbs->flavor == (u32)(-1))
487 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 488 break;
489 case RPC_AUTH_UNIX:
490 READ_BUF(8);
491 /* stamp */
06553991 492 dummy = be32_to_cpup(p++);
acb2887e
BF		 493
494 /* machine name */
06553991 495 dummy = be32_to_cpup(p++);
acb2887e
BF		 496 READ_BUF(dummy);
497 SAVEMEM(machine_name, dummy);
498
499 /* uid, gid */
500 READ_BUF(8);
06553991
BF		 501 uid = be32_to_cpup(p++);
502 gid = be32_to_cpup(p++);
acb2887e
BF		 503
504 /* more gids */
505 READ_BUF(4);
06553991 506 dummy = be32_to_cpup(p++);
acb2887e 507 READ_BUF(dummy * 4);
12fc3e92 508 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 509 kuid_t kuid = make_kuid(&init_user_ns, uid);
510 kgid_t kgid = make_kgid(&init_user_ns, gid);
511 if (uid_valid(kuid) && gid_valid(kgid)) {
512 cbs->uid = kuid;
513 cbs->gid = kgid;
514 cbs->flavor = RPC_AUTH_UNIX;
515 } else {
516 dprintk("RPC_AUTH_UNIX with invalid"
517 "uid or gid ignoring!\n");
518 }
12fc3e92 519 }
acb2887e
BF		 520 break;
521 case RPC_AUTH_GSS:
522 dprintk("RPC_AUTH_GSS callback secflavor "
523 "not supported!\n");
524 READ_BUF(8);
525 /* gcbp_service */
06553991 526 dummy = be32_to_cpup(p++);
acb2887e 527 /* gcbp_handle_from_server */
06553991 528 dummy = be32_to_cpup(p++);
acb2887e
BF		 529 READ_BUF(dummy);
530 p += XDR_QUADLEN(dummy);
531 /* gcbp_handle_from_client */
532 READ_BUF(4);
06553991 533 dummy = be32_to_cpup(p++);
acb2887e
BF		 534 READ_BUF(dummy);
535 break;
536 default:
537 dprintk("Illegal callback secflavor\n");
538 return nfserr_inval;
539 }
540 }
541 DECODE_TAIL;
542}
543
cb73a9f4
BF		 544static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
545{
546 DECODE_HEAD;
547
548 READ_BUF(4);
06553991 549 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 550 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
551
552 DECODE_TAIL;
553}
554
1d1bc8f2
BF		 555static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
556{
557 DECODE_HEAD;
1d1bc8f2
BF		 558
559 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
560 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 561 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 562 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
563 * could help us figure out we should be using it. */
1d1bc8f2
BF		 564 DECODE_TAIL;
565}
566
b37ad28b 567static __be32
1da177e4
LT		 568nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
569{
570 DECODE_HEAD;
571
e31a1b66 572 READ_BUF(4);
06553991 573 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 574 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 575
576 DECODE_TAIL;
577}
578
579
b37ad28b 580static __be32
1da177e4
LT		 581nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
582{
583 DECODE_HEAD;
584
585 READ_BUF(12);
586 READ64(commit->co_offset);
06553991 587 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 588
589 DECODE_TAIL;
590}
591
b37ad28b 592static __be32
1da177e4
LT		 593nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
594{
595 DECODE_HEAD;
596
597 READ_BUF(4);
06553991 598 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 599 switch (create->cr_type) {
600 case NF4LNK:
601 READ_BUF(4);
06553991 602 create->cr_linklen = be32_to_cpup(p++);
1da177e4
LT		 603 READ_BUF(create->cr_linklen);
604 SAVEMEM(create->cr_linkname, create->cr_linklen);
605 break;
606 case NF4BLK:
607 case NF4CHR:
608 READ_BUF(8);
06553991
BF		 609 create->cr_specdata1 = be32_to_cpup(p++);
610 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 611 break;
612 case NF4SOCK:
613 case NF4FIFO:
614 case NF4DIR:
615 default:
616 break;
617 }
618
619 READ_BUF(4);
06553991 620 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 621 READ_BUF(create->cr_namelen);
622 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 623 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 624 return status;
625
3c8e0316 626 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 627 &create->cr_acl, &create->cr_label);
c0d6fc8a 628 if (status)
1da177e4
LT		 629 goto out;
630
631 DECODE_TAIL;
632}
633
b37ad28b 634static inline __be32
1da177e4
LT		 635nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
636{
e31a1b66 637 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 638}
639
b37ad28b 640static inline __be32
1da177e4
LT		 641nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
642{
643 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
644}
645
b37ad28b 646static __be32
1da177e4
LT		 647nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
648{
649 DECODE_HEAD;
650
651 READ_BUF(4);
06553991 652 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 653 READ_BUF(link->li_namelen);
654 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 655 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 656 return status;
657
658 DECODE_TAIL;
659}
660
b37ad28b 661static __be32
1da177e4
LT		 662nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
663{
664 DECODE_HEAD;
665
1da177e4
LT		 666 /*
667 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
668 */
669 READ_BUF(28);
06553991 670 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 671 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
672 goto xdr_error;
06553991 673 lock->lk_reclaim = be32_to_cpup(p++);
1da177e4
LT		 674 READ64(lock->lk_offset);
675 READ64(lock->lk_length);
06553991 676 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 677
678 if (lock->lk_is_new) {
e31a1b66 679 READ_BUF(4);
06553991 680 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 681 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
682 if (status)
683 return status;
684 READ_BUF(8 + sizeof(clientid_t));
06553991 685 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 686 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 687 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 688 READ_BUF(lock->lk_new_owner.len);
689 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
690 } else {
e31a1b66
BH		 691 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
692 if (status)
693 return status;
694 READ_BUF(4);
06553991 695 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 696 }
697
698 DECODE_TAIL;
699}
700
b37ad28b 701static __be32
1da177e4
LT		 702nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
703{
704 DECODE_HEAD;
705
706 READ_BUF(32);
06553991 707 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 708 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
709 goto xdr_error;
710 READ64(lockt->lt_offset);
711 READ64(lockt->lt_length);
712 COPYMEM(&lockt->lt_clientid, 8);
06553991 713 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 714 READ_BUF(lockt->lt_owner.len);
715 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
716
717 DECODE_TAIL;
718}
719
b37ad28b 720static __be32
1da177e4
LT		 721nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
722{
723 DECODE_HEAD;
724
e31a1b66 725 READ_BUF(8);
06553991 726 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 727 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
728 goto xdr_error;
06553991 729 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 730 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
731 if (status)
732 return status;
733 READ_BUF(16);
1da177e4
LT		 734 READ64(locku->lu_offset);
735 READ64(locku->lu_length);
736
737 DECODE_TAIL;
738}
739
b37ad28b 740static __be32
1da177e4
LT		 741nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
742{
743 DECODE_HEAD;
744
745 READ_BUF(4);
06553991 746 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 747 READ_BUF(lookup->lo_len);
748 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 749 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 750 return status;
751
752 DECODE_TAIL;
753}
754
2c8bd7e0 755static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 756{
757 __be32 *p;
758 u32 w;
759
760 READ_BUF(4);
06553991 761 w = be32_to_cpup(p++);
2c8bd7e0
BH		 762 *share_access = w & NFS4_SHARE_ACCESS_MASK;
763 *deleg_want = w & NFS4_SHARE_WANT_MASK;
764 if (deleg_when)
765 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
766
04f9e664
BF		 767 switch (w & NFS4_SHARE_ACCESS_MASK) {
768 case NFS4_SHARE_ACCESS_READ:
769 case NFS4_SHARE_ACCESS_WRITE:
770 case NFS4_SHARE_ACCESS_BOTH:
771 break;
772 default:
773 return nfserr_bad_xdr;
774 }
fc0d14fe 775 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 776 if (!w)
777 return nfs_ok;
778 if (!argp->minorversion)
779 return nfserr_bad_xdr;
780 switch (w & NFS4_SHARE_WANT_MASK) {
781 case NFS4_SHARE_WANT_NO_PREFERENCE:
782 case NFS4_SHARE_WANT_READ_DELEG:
783 case NFS4_SHARE_WANT_WRITE_DELEG:
784 case NFS4_SHARE_WANT_ANY_DELEG:
785 case NFS4_SHARE_WANT_NO_DELEG:
786 case NFS4_SHARE_WANT_CANCEL:
787 break;
788 default:
789 return nfserr_bad_xdr;
790 }
92bac8c5 791 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 792 if (!w)
793 return nfs_ok;
2c8bd7e0
BH		 794
795 if (!deleg_when) /* open_downgrade */
796 return nfserr_inval;
04f9e664
BF		 797 switch (w) {
798 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
799 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 800 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
801 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 802 return nfs_ok;
803 }
804xdr_error:
805 return nfserr_bad_xdr;
806}
807
808static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
809{
810 __be32 *p;
811
812 READ_BUF(4);
06553991 813 *x = be32_to_cpup(p++);
04f9e664 814 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 815 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 816 return nfserr_bad_xdr;
817 return nfs_ok;
818xdr_error:
819 return nfserr_bad_xdr;
820}
821
a084daf5
BF		 822static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
823{
824 __be32 *p;
825
826 READ_BUF(4);
06553991 827 o->len = be32_to_cpup(p++);
a084daf5
BF		 828
829 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
830 return nfserr_bad_xdr;
831
832 READ_BUF(o->len);
833 SAVEMEM(o->data, o->len);
834 return nfs_ok;
835xdr_error:
836 return nfserr_bad_xdr;
837}
838
b37ad28b 839static __be32
1da177e4
LT		 840nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
841{
842 DECODE_HEAD;
2c8bd7e0 843 u32 dummy;
1da177e4
LT		 844
845 memset(open->op_bmval, 0, sizeof(open->op_bmval));
846 open->op_iattr.ia_valid = 0;
fe0750e5 847 open->op_openowner = NULL;
1da177e4 848
9d313b17 849 open->op_xdr_error = 0;
1da177e4 850 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 851 READ_BUF(4);
06553991 852 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 853 /* decode, yet ignore deleg_when until supported */
854 status = nfsd4_decode_share_access(argp, &open->op_share_access,
855 &open->op_deleg_want, &dummy);
04f9e664
BF		 856 if (status)
857 goto xdr_error;
858 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
859 if (status)
860 goto xdr_error;
a084daf5 861 READ_BUF(sizeof(clientid_t));
1da177e4 862 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 863 status = nfsd4_decode_opaque(argp, &open->op_owner);
864 if (status)
865 goto xdr_error;
866 READ_BUF(4);
06553991 867 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 868 switch (open->op_create) {
869 case NFS4_OPEN_NOCREATE:
870 break;
871 case NFS4_OPEN_CREATE:
872 READ_BUF(4);
06553991 873 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 874 switch (open->op_createmode) {
875 case NFS4_CREATE_UNCHECKED:
876 case NFS4_CREATE_GUARDED:
c0d6fc8a 877 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 878 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 879 if (status)
1da177e4
LT		 880 goto out;
881 break;
882 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 883 READ_BUF(NFS4_VERIFIER_SIZE);
884 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 885 break;
79fb54ab
BH		 886 case NFS4_CREATE_EXCLUSIVE4_1:
887 if (argp->minorversion < 1)
888 goto xdr_error;
ab4684d1
CL		 889 READ_BUF(NFS4_VERIFIER_SIZE);
890 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 891 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 892 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 893 if (status)
894 goto out;
895 break;
1da177e4
LT		 896 default:
897 goto xdr_error;
898 }
899 break;
900 default:
901 goto xdr_error;
902 }
903
904 /* open_claim */
905 READ_BUF(4);
06553991 906 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 907 switch (open->op_claim_type) {
908 case NFS4_OPEN_CLAIM_NULL:
909 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
910 READ_BUF(4);
06553991 911 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 912 READ_BUF(open->op_fname.len);
913 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 914 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 915 return status;
916 break;
917 case NFS4_OPEN_CLAIM_PREVIOUS:
918 READ_BUF(4);
06553991 919 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 920 break;
921 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 922 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
923 if (status)
924 return status;
925 READ_BUF(4);
06553991 926 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 927 READ_BUF(open->op_fname.len);
928 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 929 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 930 return status;
931 break;
8b289b2c
BF		 932 case NFS4_OPEN_CLAIM_FH:
933 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
934 if (argp->minorversion < 1)
935 goto xdr_error;
936 /* void */
937 break;
938 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
939 if (argp->minorversion < 1)
940 goto xdr_error;
941 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
942 if (status)
943 return status;
944 break;
1da177e4
LT		 945 default:
946 goto xdr_error;
947 }
948
949 DECODE_TAIL;
950}
951
b37ad28b 952static __be32
1da177e4
LT		 953nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
954{
955 DECODE_HEAD;
e1a90ebd
AS		 956
957 if (argp->minorversion >= 1)
958 return nfserr_notsupp;
959
e31a1b66
BH		 960 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
961 if (status)
962 return status;
963 READ_BUF(4);
06553991 964 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 965
1da177e4
LT		 966 DECODE_TAIL;
967}
968
b37ad28b 969static __be32
1da177e4
LT		 970nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
971{
972 DECODE_HEAD;
973
e31a1b66
BH		 974 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
975 if (status)
976 return status;
04f9e664 977 READ_BUF(4);
06553991 978 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 979 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
980 &open_down->od_deleg_want, NULL);
04f9e664
BF		 981 if (status)
982 return status;
983 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
984 if (status)
985 return status;
1da177e4
LT		 986 DECODE_TAIL;
987}
988
b37ad28b 989static __be32
1da177e4
LT		 990nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
991{
992 DECODE_HEAD;
993
994 READ_BUF(4);
06553991 995 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 996 if (putfh->pf_fhlen > NFS4_FHSIZE)
997 goto xdr_error;
998 READ_BUF(putfh->pf_fhlen);
999 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1000
1001 DECODE_TAIL;
1002}
1003
e1a90ebd
AS		 1004static __be32
1005nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1006{
1007 if (argp->minorversion == 0)
1008 return nfs_ok;
1009 return nfserr_notsupp;
1010}
1011
b37ad28b 1012static __be32
1da177e4
LT		 1013nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1014{
1015 DECODE_HEAD;
1016
e31a1b66
BH		 1017 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1018 if (status)
1019 return status;
1020 READ_BUF(12);
1da177e4 1021 READ64(read->rd_offset);
06553991 1022 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1023
1024 DECODE_TAIL;
1025}
1026
b37ad28b 1027static __be32
1da177e4
LT		 1028nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1029{
1030 DECODE_HEAD;
1031
1032 READ_BUF(24);
1033 READ64(readdir->rd_cookie);
1034 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1035 readdir->rd_dircount = be32_to_cpup(p++);
1036 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1037 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1038 goto out;
1039
1040 DECODE_TAIL;
1041}
1042
b37ad28b 1043static __be32
1da177e4
LT		 1044nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1045{
1046 DECODE_HEAD;
1047
1048 READ_BUF(4);
06553991 1049 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1050 READ_BUF(remove->rm_namelen);
1051 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1052 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1053 return status;
1054
1055 DECODE_TAIL;
1056}
1057
b37ad28b 1058static __be32
1da177e4
LT		 1059nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1060{
1061 DECODE_HEAD;
1062
1063 READ_BUF(4);
06553991 1064 rename->rn_snamelen = be32_to_cpup(p++);
1da177e4
LT		 1065 READ_BUF(rename->rn_snamelen + 4);
1066 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
06553991 1067 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1068 READ_BUF(rename->rn_tnamelen);
1069 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1070 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1071 return status;
a36b1725 1072 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1073 return status;
1074
1075 DECODE_TAIL;
1076}
1077
b37ad28b 1078static __be32
1da177e4
LT		 1079nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1080{
1081 DECODE_HEAD;
1082
e1a90ebd
AS		 1083 if (argp->minorversion >= 1)
1084 return nfserr_notsupp;
1085
1da177e4
LT		 1086 READ_BUF(sizeof(clientid_t));
1087 COPYMEM(clientid, sizeof(clientid_t));
1088
1089 DECODE_TAIL;
1090}
1091
dcb488a3
AA		 1092static __be32
1093nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1094 struct nfsd4_secinfo *secinfo)
1095{
1096 DECODE_HEAD;
1097
1098 READ_BUF(4);
06553991 1099 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1100 READ_BUF(secinfo->si_namelen);
1101 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1102 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1103 if (status)
1104 return status;
1105 DECODE_TAIL;
1106}
1107
04f4ad16
BF		 1108static __be32
1109nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1110 struct nfsd4_secinfo_no_name *sin)
1111{
1112 DECODE_HEAD;
1113
1114 READ_BUF(4);
06553991 1115 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1116 DECODE_TAIL;
1117}
1118
b37ad28b 1119static __be32
1da177e4
LT		 1120nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1121{
e31a1b66 1122 __be32 status;
1da177e4 1123
e31a1b66
BH		 1124 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1125 if (status)
1126 return status;
3c8e0316 1127 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1128 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1129}
1130
b37ad28b 1131static __be32
1da177e4
LT		 1132nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1133{
1134 DECODE_HEAD;
1135
e1a90ebd
AS		 1136 if (argp->minorversion >= 1)
1137 return nfserr_notsupp;
1138
ab4684d1
CL		 1139 READ_BUF(NFS4_VERIFIER_SIZE);
1140 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1141
a084daf5
BF		 1142 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1143 if (status)
1144 return nfserr_bad_xdr;
1145 READ_BUF(8);
06553991
BF		 1146 setclientid->se_callback_prog = be32_to_cpup(p++);
1147 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1da177e4
LT		 1148
1149 READ_BUF(setclientid->se_callback_netid_len + 4);
1150 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
06553991 1151 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4
LT		 1152
1153 READ_BUF(setclientid->se_callback_addr_len + 4);
1154 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
06553991 1155 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1156
1157 DECODE_TAIL;
1158}
1159
b37ad28b 1160static __be32
1da177e4
LT		 1161nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1162{
1163 DECODE_HEAD;
1164
e1a90ebd
AS		 1165 if (argp->minorversion >= 1)
1166 return nfserr_notsupp;
1167
ab4684d1 1168 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1169 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1170 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1171
1172 DECODE_TAIL;
1173}
1174
1175/* Also used for NVERIFY */
b37ad28b 1176static __be32
1da177e4
LT		 1177nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1178{
1da177e4
LT		 1179 DECODE_HEAD;
1180
1181 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1182 goto out;
1183
1184 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1185 * nfsd4_proc_verify */
1186
1da177e4 1187 READ_BUF(4);
06553991 1188 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1189 READ_BUF(verify->ve_attrlen);
1190 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1191
1192 DECODE_TAIL;
1193}
1194
b37ad28b 1195static __be32
1da177e4
LT		 1196nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1197{
1198 int avail;
1da177e4
LT		 1199 int len;
1200 DECODE_HEAD;
1201
e31a1b66
BH		 1202 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1203 if (status)
1204 return status;
1205 READ_BUF(16);
1da177e4 1206 READ64(write->wr_offset);
06553991 1207 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1208 if (write->wr_stable_how > 2)
1209 goto xdr_error;
06553991 1210 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1211
1212 /* Sorry .. no magic macros for this.. *
1213 * READ_BUF(write->wr_buflen);
1214 * SAVEMEM(write->wr_buf, write->wr_buflen);
1215 */
1216 avail = (char*)argp->end - (char*)argp->p;
1217 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1218 dprintk("NFSD: xdr error (%s:%d)\n",
1219 __FILE__, __LINE__);
1da177e4
LT		 1220 goto xdr_error;
1221 }
70cc7f75
BF		 1222 write->wr_head.iov_base = p;
1223 write->wr_head.iov_len = avail;
70cc7f75 1224 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1225
1226 len = XDR_QUADLEN(write->wr_buflen) << 2;
1227 if (len >= avail) {
1228 int pages;
1229
1230 len -= avail;
1231
1232 pages = len >> PAGE_SHIFT;
1233 argp->pagelist += pages;
1234 argp->pagelen -= pages * PAGE_SIZE;
1235 len -= pages * PAGE_SIZE;
1236
1237 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1238 argp->pagelist++;
5a80a54d 1239 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1240 }
5a80a54d 1241 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1242
1243 DECODE_TAIL;
1244}
1245
b37ad28b 1246static __be32
1da177e4
LT		 1247nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1248{
1249 DECODE_HEAD;
1250
e1a90ebd
AS		 1251 if (argp->minorversion >= 1)
1252 return nfserr_notsupp;
1253
1da177e4
LT		 1254 READ_BUF(12);
1255 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1256 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1257 READ_BUF(rlockowner->rl_owner.len);
1258 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1259
60adfc50
AA		 1260 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1261 return nfserr_inval;
1da177e4
LT		 1262 DECODE_TAIL;
1263}
1264
2db134eb
AA		 1265static __be32
1266nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1267 struct nfsd4_exchange_id *exid)
2db134eb 1268{
5afa040b 1269 int dummy, tmp;
0733d213
AA		 1270 DECODE_HEAD;
1271
1272 READ_BUF(NFS4_VERIFIER_SIZE);
1273 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1274
a084daf5
BF		 1275 status = nfsd4_decode_opaque(argp, &exid->clname);
1276 if (status)
1277 return nfserr_bad_xdr;
0733d213
AA		 1278
1279 READ_BUF(4);
06553991 1280 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1281
1282 /* Ignore state_protect4_a */
1283 READ_BUF(4);
06553991 1284 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1285 switch (exid->spa_how) {
1286 case SP4_NONE:
1287 break;
1288 case SP4_MACH_CRED:
1289 /* spo_must_enforce */
1290 READ_BUF(4);
06553991 1291 dummy = be32_to_cpup(p++);
0733d213
AA		 1292 READ_BUF(dummy * 4);
1293 p += dummy;
1294
1295 /* spo_must_allow */
1296 READ_BUF(4);
06553991 1297 dummy = be32_to_cpup(p++);
0733d213
AA		 1298 READ_BUF(dummy * 4);
1299 p += dummy;
1300 break;
1301 case SP4_SSV:
1302 /* ssp_ops */
1303 READ_BUF(4);
06553991 1304 dummy = be32_to_cpup(p++);
0733d213
AA		 1305 READ_BUF(dummy * 4);
1306 p += dummy;
1307
1308 READ_BUF(4);
06553991 1309 dummy = be32_to_cpup(p++);
0733d213
AA		 1310 READ_BUF(dummy * 4);
1311 p += dummy;
1312
1313 /* ssp_hash_algs<> */
1314 READ_BUF(4);
06553991 1315 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1316 while (tmp--) {
1317 READ_BUF(4);
06553991 1318 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1319 READ_BUF(dummy);
1320 p += XDR_QUADLEN(dummy);
1321 }
0733d213
AA		 1322
1323 /* ssp_encr_algs<> */
1324 READ_BUF(4);
06553991 1325 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1326 while (tmp--) {
1327 READ_BUF(4);
06553991 1328 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1329 READ_BUF(dummy);
1330 p += XDR_QUADLEN(dummy);
1331 }
0733d213
AA		 1332
1333 /* ssp_window and ssp_num_gss_handles */
1334 READ_BUF(8);
06553991
BF		 1335 dummy = be32_to_cpup(p++);
1336 dummy = be32_to_cpup(p++);
0733d213
AA		 1337 break;
1338 default:
1339 goto xdr_error;
1340 }
1341
1342 /* Ignore Implementation ID */
1343 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1344 dummy = be32_to_cpup(p++);
0733d213
AA		 1345
1346 if (dummy > 1)
1347 goto xdr_error;
1348
1349 if (dummy == 1) {
1350 /* nii_domain */
1351 READ_BUF(4);
06553991 1352 dummy = be32_to_cpup(p++);
0733d213
AA		 1353 READ_BUF(dummy);
1354 p += XDR_QUADLEN(dummy);
1355
1356 /* nii_name */
1357 READ_BUF(4);
06553991 1358 dummy = be32_to_cpup(p++);
0733d213
AA		 1359 READ_BUF(dummy);
1360 p += XDR_QUADLEN(dummy);
1361
1362 /* nii_date */
1363 READ_BUF(12);
1364 p += 3;
1365 }
1366 DECODE_TAIL;
2db134eb
AA		 1367}
1368
1369static __be32
1370nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1371 struct nfsd4_create_session *sess)
1372{
ec6b5d7b 1373 DECODE_HEAD;
ec6b5d7b 1374 u32 dummy;
ec6b5d7b
AA		 1375
1376 READ_BUF(16);
1377 COPYMEM(&sess->clientid, 8);
06553991
BF		 1378 sess->seqid = be32_to_cpup(p++);
1379 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1380
1381 /* Fore channel attrs */
1382 READ_BUF(28);
06553991
BF		 1383 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1384 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1385 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1386 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1387 sess->fore_channel.maxops = be32_to_cpup(p++);
1388 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1389 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1390 if (sess->fore_channel.nr_rdma_attrs == 1) {
1391 READ_BUF(4);
06553991 1392 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1393 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1394 dprintk("Too many fore channel attr bitmaps!\n");
1395 goto xdr_error;
1396 }
1397
1398 /* Back channel attrs */
1399 READ_BUF(28);
06553991
BF		 1400 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1401 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1402 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1403 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1404 sess->back_channel.maxops = be32_to_cpup(p++);
1405 sess->back_channel.maxreqs = be32_to_cpup(p++);
1406 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1407 if (sess->back_channel.nr_rdma_attrs == 1) {
1408 READ_BUF(4);
06553991 1409 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1410 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1411 dprintk("Too many back channel attr bitmaps!\n");
1412 goto xdr_error;
1413 }
1414
acb2887e 1415 READ_BUF(4);
06553991 1416 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1417 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1418 DECODE_TAIL;
2db134eb
AA		 1419}
1420
1421static __be32
1422nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1423 struct nfsd4_destroy_session *destroy_session)
1424{
e10e0cfc
BH		 1425 DECODE_HEAD;
1426 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1427 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1428
1429 DECODE_TAIL;
2db134eb
AA		 1430}
1431
e1ca12df
BS		 1432static __be32
1433nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1434 struct nfsd4_free_stateid *free_stateid)
1435{
1436 DECODE_HEAD;
1437
1438 READ_BUF(sizeof(stateid_t));
06553991 1439 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1440 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1441
1442 DECODE_TAIL;
1443}
1444
2db134eb
AA		 1445static __be32
1446nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1447 struct nfsd4_sequence *seq)
1448{
b85d4c01
BH		 1449 DECODE_HEAD;
1450
1451 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1452 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1453 seq->seqid = be32_to_cpup(p++);
1454 seq->slotid = be32_to_cpup(p++);
1455 seq->maxslots = be32_to_cpup(p++);
1456 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1457
1458 DECODE_TAIL;
2db134eb
AA		 1459}
1460
17456804
BS		 1461static __be32
1462nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1463{
17456804 1464 int i;
03cfb420
BS		 1465 __be32 *p, status;
1466 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1467
1468 READ_BUF(4);
1469 test_stateid->ts_num_ids = ntohl(*p++);
1470
03cfb420 1471 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1472
1473 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1474 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1475 if (!stateid) {
afcf6792 1476 status = nfserrno(-ENOMEM);
03cfb420
BS		 1477 goto out;
1478 }
1479
1480 defer_free(argp, kfree, stateid);
1481 INIT_LIST_HEAD(&stateid->ts_id_list);
1482 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1483
1484 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1485 if (status)
03cfb420 1486 goto out;
17456804
BS		 1487 }
1488
1489 status = 0;
1490out:
1491 return status;
1492xdr_error:
1493 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1494 status = nfserr_bad_xdr;
1495 goto out;
1496}
1497
345c2842
MJ		 1498static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1499{
1500 DECODE_HEAD;
1501
1502 READ_BUF(8);
1503 COPYMEM(&dc->clientid, 8);
1504
1505 DECODE_TAIL;
1506}
1507
4dc6ec00
BF		 1508static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1509{
1510 DECODE_HEAD;
1511
1512 READ_BUF(4);
06553991 1513 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1514
1515 DECODE_TAIL;
1516}
1517
347e0ad9
BH		 1518static __be32
1519nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1520{
1521 return nfs_ok;
1522}
1523
3c375c6f
BH		 1524static __be32
1525nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1526{
1e685ec2 1527 return nfserr_notsupp;
3c375c6f
BH		 1528}
1529
347e0ad9
BH		 1530typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1531
1532static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1533 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1534 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1535 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1536 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1537 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1538 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1539 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1540 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1541 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1542 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1543 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1544 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1545 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1546 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1547 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1548 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1549 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1550 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1551 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1552 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1553 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1554 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1555 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1556 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1557 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1558 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1559 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1560 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1561 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1562 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1564 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1565 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1566 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1567 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1568 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1569 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1570
1571 /* new operations for NFSv4.1 */
cb73a9f4 1572 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1573 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1574 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1575 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1576 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1577 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1578 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1579 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1584 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1585 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1586 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1587 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1588 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1589 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1590 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1591};
1592
e1a90ebd
AS		 1593static inline bool
1594nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1595{
8217d146 1596 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1597 return false;
8217d146 1598 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1599 return false;
8217d146
AS		 1600 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1601 return false;
1602 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1603 return false;
1604 return true;
1605}
f2feb96b 1606
b37ad28b 1607static __be32
1da177e4
LT		 1608nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1609{
1610 DECODE_HEAD;
1611 struct nfsd4_op *op;
1091006c 1612 bool cachethis = false;
a5cddc88
BF		 1613 int auth_slack= argp->rqstp->rq_auth_slack;
1614 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1615 int readcount = 0;
1616 int readbytes = 0;
1da177e4
LT		 1617 int i;
1618
1da177e4 1619 READ_BUF(4);
06553991 1620 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1621 READ_BUF(argp->taglen + 8);
1622 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1623 argp->minorversion = be32_to_cpup(p++);
1624 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1625 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1626
1627 if (argp->taglen > NFSD4_MAX_TAGLEN)
1628 goto xdr_error;
1629 if (argp->opcnt > 100)
1630 goto xdr_error;
1631
e8c96f8c 1632 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1633 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1634 if (!argp->ops) {
1635 argp->ops = argp->iops;
817cb9d4 1636 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1637 goto xdr_error;
1638 }
1639 }
1640
e1a90ebd 1641 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1642 argp->opcnt = 0;
1643
1da177e4
LT		 1644 for (i = 0; i < argp->opcnt; i++) {
1645 op = &argp->ops[i];
1646 op->replay = NULL;
1647
8a61b18c 1648 READ_BUF(4);
06553991 1649 op->opnum = be32_to_cpup(p++);
1da177e4 1650
e1a90ebd
AS		 1651 if (nfsd4_opnum_in_range(argp, op))
1652 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1653 else {
1da177e4
LT		 1654 op->opnum = OP_ILLEGAL;
1655 op->status = nfserr_op_illegal;
1da177e4 1656 }
1091006c
BF		 1657 /*
1658 * We'll try to cache the result in the DRC if any one
1659 * op in the compound wants to be cached:
1660 */
1661 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1662
b0e35fda
BF		 1663 if (op->opnum == OP_READ) {
1664 readcount++;
1665 readbytes += nfsd4_max_reply(argp->rqstp, op);
1666 } else
1667 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1668
1669 if (op->status) {
1670 argp->opcnt = i+1;
1671 break;
1672 }
1da177e4 1673 }
1091006c
BF		 1674 /* Sessions make the DRC unnecessary: */
1675 if (argp->minorversion)
1676 cachethis = false;
b0e35fda 1677 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1678 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1679
a5cddc88 1680 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
b0e35fda
BF		 1681 argp->rqstp->rq_splice_ok = false;
1682
1da177e4
LT		 1683 DECODE_TAIL;
1684}
1da177e4 1685
d05d5744 1686static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1687{
1688 if (IS_I_VERSION(inode)) {
d05d5744 1689 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1690 } else {
d05d5744
BF		 1691 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1692 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1693 }
d05d5744 1694 return p;
c654b8a9
BF		 1695}
1696
d05d5744 1697static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1698{
d05d5744 1699 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1700 if (c->change_supported) {
d05d5744
BF		 1701 p = xdr_encode_hyper(p, c->before_change);
1702 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1703 } else {
d05d5744
BF		 1704 *p++ = cpu_to_be32(c->before_ctime_sec);
1705 *p++ = cpu_to_be32(c->before_ctime_nsec);
1706 *p++ = cpu_to_be32(c->after_ctime_sec);
1707 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1708 }
d05d5744 1709 return p;
c654b8a9 1710}
1da177e4 1711
81c3f413 1712/* Encode as an array of strings the string given with components
e7a0444a 1713 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1714 */
ddd1ea56
BF		 1715static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1716 char *components, char esc_enter,
1717 char esc_exit)
81c3f413 1718{
ddd1ea56 1719 __be32 *p;
082d4bd7
BF		 1720 __be32 pathlen;
1721 int pathlen_offset;
81c3f413 1722 int strlen, count=0;
e7a0444a 1723 char *str, *end, *next;
81c3f413
BF		 1724
1725 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1726
1727 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1728 p = xdr_reserve_space(xdr, 4);
1729 if (!p)
81c3f413 1730 return nfserr_resource;
082d4bd7
BF		 1731 p++; /* We will fill this in with @count later */
1732
81c3f413
BF		 1733 end = str = components;
1734 while (*end) {
e7a0444a
WAA		 1735 bool found_esc = false;
1736
1737 /* try to parse as esc_start, ..., esc_end, sep */
1738 if (*str == esc_enter) {
1739 for (; *end && (*end != esc_exit); end++)
1740 /* find esc_exit or end of string */;
1741 next = end + 1;
1742 if (*end && (!*next || *next == sep)) {
1743 str++;
1744 found_esc = true;
1745 }
1746 }
1747
1748 if (!found_esc)
1749 for (; *end && (*end != sep); end++)
1750 /* find sep or end of string */;
1751
81c3f413
BF		 1752 strlen = end - str;
1753 if (strlen) {
ddd1ea56
BF		 1754 p = xdr_reserve_space(xdr, strlen + 4);
1755 if (!p)
81c3f413 1756 return nfserr_resource;
0c0c267b 1757 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1758 count++;
1759 }
1760 else
1761 end++;
1762 str = end;
1763 }
082d4bd7
BF		 1764 pathlen = htonl(xdr->buf->len - pathlen_offset);
1765 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1766 return 0;
1767}
1768
e7a0444a
WAA		 1769/* Encode as an array of strings the string given with components
1770 * separated @sep.
1771 */
ddd1ea56
BF		 1772static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1773 char *components)
e7a0444a 1774{
ddd1ea56 1775 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1776}
1777
81c3f413
BF		 1778/*
1779 * encode a location element of a fs_locations structure
1780 */
ddd1ea56
BF		 1781static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1782 struct nfsd4_fs_location *location)
81c3f413 1783{
b37ad28b 1784 __be32 status;
81c3f413 1785
ddd1ea56 1786 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1787 '[', ']');
81c3f413
BF		 1788 if (status)
1789 return status;
ddd1ea56 1790 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1791 if (status)
1792 return status;
81c3f413
BF		 1793 return 0;
1794}
1795
1796/*
ed748aac 1797 * Encode a path in RFC3530 'pathname4' format
81c3f413 1798 */
ddd1ea56
BF		 1799static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1800 const struct path *root,
1801 const struct path *path)
81c3f413 1802{
301f0268 1803 struct path cur = *path;
ddd1ea56 1804 __be32 *p;
ed748aac
TM		 1805 struct dentry **components = NULL;
1806 unsigned int ncomponents = 0;
1807 __be32 err = nfserr_jukebox;
81c3f413 1808
ed748aac 1809 dprintk("nfsd4_encode_components(");
81c3f413 1810
ed748aac
TM		 1811 path_get(&cur);
1812 /* First walk the path up to the nfsd root, and store the
1813 * dentries/path components in an array.
1814 */
1815 for (;;) {
1816 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1817 break;
1818 if (cur.dentry == cur.mnt->mnt_root) {
1819 if (follow_up(&cur))
1820 continue;
1821 goto out_free;
1822 }
1823 if ((ncomponents & 15) == 0) {
1824 struct dentry **new;
1825 new = krealloc(components,
1826 sizeof(*new) * (ncomponents + 16),
1827 GFP_KERNEL);
1828 if (!new)
1829 goto out_free;
1830 components = new;
1831 }
1832 components[ncomponents++] = cur.dentry;
1833 cur.dentry = dget_parent(cur.dentry);
1834 }
ddd1ea56
BF		 1835 err = nfserr_resource;
1836 p = xdr_reserve_space(xdr, 4);
1837 if (!p)
ed748aac 1838 goto out_free;
c373b0a4 1839 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1840
1841 while (ncomponents) {
1842 struct dentry *dentry = components[ncomponents - 1];
301f0268 1843 unsigned int len;
ed748aac 1844
301f0268
AV		 1845 spin_lock(&dentry->d_lock);
1846 len = dentry->d_name.len;
ddd1ea56
BF		 1847 p = xdr_reserve_space(xdr, len + 4);
1848 if (!p) {
301f0268 1849 spin_unlock(&dentry->d_lock);
ed748aac 1850 goto out_free;
301f0268 1851 }
0c0c267b 1852 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1853 dprintk("/%s", dentry->d_name.name);
301f0268 1854 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1855 dput(dentry);
1856 ncomponents--;
81c3f413 1857 }
ed748aac 1858
ed748aac
TM		 1859 err = 0;
1860out_free:
1861 dprintk(")\n");
1862 while (ncomponents)
1863 dput(components[--ncomponents]);
1864 kfree(components);
1865 path_put(&cur);
1866 return err;
1867}
1868
ddd1ea56
BF		 1869static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1870 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1871{
1872 struct svc_export *exp_ps;
1873 __be32 res;
1874
1875 exp_ps = rqst_find_fsidzero_export(rqstp);
1876 if (IS_ERR(exp_ps))
1877 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1878 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1879 exp_put(exp_ps);
1880 return res;
81c3f413
BF		 1881}
1882
1883/*
1884 * encode a fs_locations structure
1885 */
ddd1ea56
BF		 1886static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1887 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1888{
b37ad28b 1889 __be32 status;
cc45f017 1890 int i;
ddd1ea56 1891 __be32 *p;
81c3f413 1892 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1893
ddd1ea56 1894 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1895 if (status)
1896 return status;
ddd1ea56
BF		 1897 p = xdr_reserve_space(xdr, 4);
1898 if (!p)
81c3f413 1899 return nfserr_resource;
c373b0a4 1900 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1901 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1902 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1903 if (status)
1904 return status;
1905 }
81c3f413
BF		 1906 return 0;
1907}
1da177e4 1908
3d2544b1
BF		 1909static u32 nfs4_file_type(umode_t mode)
1910{
1911 switch (mode & S_IFMT) {
1912 case S_IFIFO: return NF4FIFO;
1913 case S_IFCHR: return NF4CHR;
1914 case S_IFDIR: return NF4DIR;
1915 case S_IFBLK: return NF4BLK;
1916 case S_IFLNK: return NF4LNK;
1917 case S_IFREG: return NF4REG;
1918 case S_IFSOCK: return NF4SOCK;
1919 default: return NF4BAD;
1920 };
1921}
1da177e4 1922
b37ad28b 1923static inline __be32
ddd1ea56
BF		 1924nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1925 struct nfs4_ace *ace)
1da177e4 1926{
3554116d 1927 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1928 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1929 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1930 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1931 else
ddd1ea56 1932 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1933}
1934
42ca0993
BF		 1935#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1936 FATTR4_WORD0_RDATTR_ERROR)
1937#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1938
18032ca0
DQ		 1939#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1940static inline __be32
ddd1ea56
BF		 1941nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1942 void *context, int len)
18032ca0 1943{
ddd1ea56 1944 __be32 *p;
18032ca0 1945
ddd1ea56
BF		 1946 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1947 if (!p)
18032ca0
DQ		 1948 return nfserr_resource;
1949
1950 /*
1951 * For now we use a 0 here to indicate the null translation; in
1952 * the future we may place a call to translation code here.
1953 */
c373b0a4
BF		 1954 *p++ = cpu_to_be32(0); /* lfs */
1955 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1956 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1957 return 0;
1958}
1959#else
1960static inline __be32
ddd1ea56
BF		 1961nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1962 void *context, int len)
18032ca0
DQ		 1963{ return 0; }
1964#endif
1965
b37ad28b 1966static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1967{
1968 /* As per referral draft: */
1969 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1970 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1971 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1972 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1973 *rdattr_err = NFSERR_MOVED;
1974 else
1975 return nfserr_moved;
1976 }
1977 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1978 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1979 return 0;
1980}
1da177e4 1981
ae7095a7
BF		 1982
1983static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1984{
1985 struct path path = exp->ex_path;
1986 int err;
1987
1988 path_get(&path);
1989 while (follow_up(&path)) {
1990 if (path.dentry != path.mnt->mnt_root)
1991 break;
1992 }
3dadecce 1993 err = vfs_getattr(&path, stat);
ae7095a7
BF		 1994 path_put(&path);
1995 return err;
1996}
1997
1da177e4
LT		 1998/*
1999 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2000 * ourselves.
1da177e4 2001 */
da2ebce6 2002static __be32
d5184658
BF		 2003nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2004 struct svc_export *exp,
2005 struct dentry *dentry, u32 *bmval,
406a7ea9 2006 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2007{
2008 u32 bmval0 = bmval[0];
2009 u32 bmval1 = bmval[1];
7e705706 2010 u32 bmval2 = bmval[2];
1da177e4 2011 struct kstat stat;
d50e6136 2012 struct svc_fh *tempfh = NULL;
1da177e4 2013 struct kstatfs statfs;
ddd1ea56 2014 __be32 *p;
1fcea5b2 2015 int starting_len = xdr->buf->len;
082d4bd7
BF		 2016 int attrlen_offset;
2017 __be32 attrlen;
1da177e4
LT		 2018 u32 dummy;
2019 u64 dummy64;
42ca0993 2020 u32 rdattr_err = 0;
b37ad28b 2021 __be32 status;
b8dd7b9a 2022 int err;
1da177e4
LT		 2023 int aclsupport = 0;
2024 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2025 void *context = NULL;
2026 int contextlen;
2027 bool contextsupport = false;
7e705706
AA		 2028 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2029 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2030 struct path path = {
2031 .mnt = exp->ex_path.mnt,
2032 .dentry = dentry,
2033 };
3d733711 2034 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2035
2036 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2037 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2038 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2039 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2040
42ca0993 2041 if (exp->ex_fslocs.migrated) {
7e705706 2042 BUG_ON(bmval[2]);
42ca0993
BF		 2043 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2044 if (status)
2045 goto out;
2046 }
2047
3dadecce 2048 err = vfs_getattr(&path, &stat);
b8dd7b9a 2049 if (err)
1da177e4 2050 goto out_nfserr;
12337901
CH		 2051 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2052 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2053 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2054 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2055 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2056 if (err)
1da177e4
LT		 2057 goto out_nfserr;
2058 }
2059 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2060 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2061 status = nfserr_jukebox;
2062 if (!tempfh)
2063 goto out;
2064 fh_init(tempfh, NFS4_FHSIZE);
2065 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2066 if (status)
2067 goto out;
d50e6136 2068 fhp = tempfh;
1da177e4
LT		 2069 }
2070 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2071 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2072 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2073 aclsupport = (err == 0);
1da177e4 2074 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2075 if (err == -EOPNOTSUPP)
1da177e4 2076 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2077 else if (err == -EINVAL) {
1da177e4
LT		 2078 status = nfserr_attrnotsupp;
2079 goto out;
b8dd7b9a 2080 } else if (err != 0)
1da177e4
LT		 2081 goto out_nfserr;
2082 }
2083 }
1da177e4 2084
18032ca0
DQ		 2085#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2086 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2087 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2088 err = security_inode_getsecctx(dentry->d_inode,
2089 &context, &contextlen);
2090 contextsupport = (err == 0);
2091 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2092 if (err == -EOPNOTSUPP)
2093 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2094 else if (err)
2095 goto out_nfserr;
2096 }
2097 }
2098#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2099
2b44f1ba 2100 if (bmval2) {
ddd1ea56
BF		 2101 p = xdr_reserve_space(xdr, 16);
2102 if (!p)
2b44f1ba 2103 goto out_resource;
c373b0a4
BF		 2104 *p++ = cpu_to_be32(3);
2105 *p++ = cpu_to_be32(bmval0);
2106 *p++ = cpu_to_be32(bmval1);
2107 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2108 } else if (bmval1) {
ddd1ea56
BF		 2109 p = xdr_reserve_space(xdr, 12);
2110 if (!p)
2b44f1ba 2111 goto out_resource;
c373b0a4
BF		 2112 *p++ = cpu_to_be32(2);
2113 *p++ = cpu_to_be32(bmval0);
2114 *p++ = cpu_to_be32(bmval1);
7e705706 2115 } else {
ddd1ea56
BF		 2116 p = xdr_reserve_space(xdr, 8);
2117 if (!p)
2b44f1ba 2118 goto out_resource;
c373b0a4
BF		 2119 *p++ = cpu_to_be32(1);
2120 *p++ = cpu_to_be32(bmval0);
7e705706 2121 }
082d4bd7
BF		 2122
2123 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2124 p = xdr_reserve_space(xdr, 4);
2125 if (!p)
2126 goto out_resource;
082d4bd7 2127 p++; /* to be backfilled later */
1da177e4
LT		 2128
2129 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2130 u32 word0 = nfsd_suppattrs0(minorversion);
2131 u32 word1 = nfsd_suppattrs1(minorversion);
2132 u32 word2 = nfsd_suppattrs2(minorversion);
2133
42ca0993
BF		 2134 if (!aclsupport)
2135 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2136 if (!contextsupport)
2137 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2138 if (!word2) {
ddd1ea56
BF		 2139 p = xdr_reserve_space(xdr, 12);
2140 if (!p)
2b44f1ba 2141 goto out_resource;
c373b0a4
BF		 2142 *p++ = cpu_to_be32(2);
2143 *p++ = cpu_to_be32(word0);
2144 *p++ = cpu_to_be32(word1);
7e705706 2145 } else {
ddd1ea56
BF		 2146 p = xdr_reserve_space(xdr, 16);
2147 if (!p)
2b44f1ba 2148 goto out_resource;
c373b0a4
BF		 2149 *p++ = cpu_to_be32(3);
2150 *p++ = cpu_to_be32(word0);
2151 *p++ = cpu_to_be32(word1);
2152 *p++ = cpu_to_be32(word2);
7e705706 2153 }
1da177e4
LT		 2154 }
2155 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2156 p = xdr_reserve_space(xdr, 4);
2157 if (!p)
1da177e4 2158 goto out_resource;
3d2544b1 2159 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2160 if (dummy == NF4BAD) {
2161 status = nfserr_serverfault;
2162 goto out;
2163 }
c373b0a4 2164 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2165 }
2166 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2167 p = xdr_reserve_space(xdr, 4);
2168 if (!p)
1da177e4 2169 goto out_resource;
49640001 2170 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2171 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2172 else
c373b0a4
BF		 2173 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2174 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2175 }
2176 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2177 p = xdr_reserve_space(xdr, 8);
2178 if (!p)
1da177e4 2179 goto out_resource;
d05d5744 2180 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2181 }
2182 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2183 p = xdr_reserve_space(xdr, 8);
2184 if (!p)
1da177e4 2185 goto out_resource;
b64c7f3b 2186 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2187 }
2188 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2189 p = xdr_reserve_space(xdr, 4);
2190 if (!p)
1da177e4 2191 goto out_resource;
c373b0a4 2192 *p++ = cpu_to_be32(1);
1da177e4
LT		 2193 }
2194 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2195 p = xdr_reserve_space(xdr, 4);
2196 if (!p)
1da177e4 2197 goto out_resource;
c373b0a4 2198 *p++ = cpu_to_be32(1);
1da177e4
LT		 2199 }
2200 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2201 p = xdr_reserve_space(xdr, 4);
2202 if (!p)
1da177e4 2203 goto out_resource;
c373b0a4 2204 *p++ = cpu_to_be32(0);
1da177e4
LT		 2205 }
2206 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2207 p = xdr_reserve_space(xdr, 16);
2208 if (!p)
1da177e4 2209 goto out_resource;
42ca0993 2210 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2211 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2212 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2213 } else switch(fsid_source(fhp)) {
2214 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2215 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2216 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2217 break;
2218 case FSIDSOURCE_DEV:
c373b0a4
BF		 2219 *p++ = cpu_to_be32(0);
2220 *p++ = cpu_to_be32(MAJOR(stat.dev));
2221 *p++ = cpu_to_be32(0);
2222 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2223 break;
2224 case FSIDSOURCE_UUID:
94eb3689
KM		 2225 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2226 EX_UUID_LEN);
af6a4e28 2227 break;
1da177e4
LT		 2228 }
2229 }
2230 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2231 p = xdr_reserve_space(xdr, 4);
2232 if (!p)
1da177e4 2233 goto out_resource;
c373b0a4 2234 *p++ = cpu_to_be32(0);
1da177e4
LT		 2235 }
2236 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2237 p = xdr_reserve_space(xdr, 4);
2238 if (!p)
1da177e4 2239 goto out_resource;
c373b0a4 2240 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2241 }
2242 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2243 p = xdr_reserve_space(xdr, 4);
2244 if (!p)
1da177e4 2245 goto out_resource;
c373b0a4 2246 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2247 }
2248 if (bmval0 & FATTR4_WORD0_ACL) {
2249 struct nfs4_ace *ace;
1da177e4
LT		 2250
2251 if (acl == NULL) {
ddd1ea56
BF		 2252 p = xdr_reserve_space(xdr, 4);
2253 if (!p)
1da177e4
LT		 2254 goto out_resource;
2255
c373b0a4 2256 *p++ = cpu_to_be32(0);
1da177e4
LT		 2257 goto out_acl;
2258 }
ddd1ea56
BF		 2259 p = xdr_reserve_space(xdr, 4);
2260 if (!p)
1da177e4 2261 goto out_resource;
c373b0a4 2262 *p++ = cpu_to_be32(acl->naces);
1da177e4 2263
28e05dd8 2264 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2265 p = xdr_reserve_space(xdr, 4*3);
2266 if (!p)
1da177e4 2267 goto out_resource;
c373b0a4
BF		 2268 *p++ = cpu_to_be32(ace->type);
2269 *p++ = cpu_to_be32(ace->flag);
2270 *p++ = cpu_to_be32(ace->access_mask &
2271 NFS4_ACE_MASK_ALL);
ddd1ea56 2272 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2273 if (status)
2274 goto out;
2275 }
2276 }
2277out_acl:
2278 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2279 p = xdr_reserve_space(xdr, 4);
2280 if (!p)
1da177e4 2281 goto out_resource;
c373b0a4 2282 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2283 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2284 }
2285 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2286 p = xdr_reserve_space(xdr, 4);
2287 if (!p)
1da177e4 2288 goto out_resource;
c373b0a4 2289 *p++ = cpu_to_be32(1);
1da177e4
LT		 2290 }
2291 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2292 p = xdr_reserve_space(xdr, 4);
2293 if (!p)
1da177e4 2294 goto out_resource;
c373b0a4 2295 *p++ = cpu_to_be32(0);
1da177e4
LT		 2296 }
2297 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2298 p = xdr_reserve_space(xdr, 4);
2299 if (!p)
1da177e4 2300 goto out_resource;
c373b0a4 2301 *p++ = cpu_to_be32(1);
1da177e4
LT		 2302 }
2303 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2304 p = xdr_reserve_space(xdr, 4);
2305 if (!p)
1da177e4 2306 goto out_resource;
c373b0a4 2307 *p++ = cpu_to_be32(1);
1da177e4
LT		 2308 }
2309 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2310 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2311 if (!p)
1da177e4 2312 goto out_resource;
0c0c267b
BF		 2313 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2314 fhp->fh_handle.fh_size);
1da177e4
LT		 2315 }
2316 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2317 p = xdr_reserve_space(xdr, 8);
2318 if (!p)
1da177e4 2319 goto out_resource;
b64c7f3b 2320 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2321 }
2322 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2323 p = xdr_reserve_space(xdr, 8);
2324 if (!p)
1da177e4 2325 goto out_resource;
b64c7f3b 2326 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2327 }
2328 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2329 p = xdr_reserve_space(xdr, 8);
2330 if (!p)
1da177e4 2331 goto out_resource;
b64c7f3b 2332 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2333 }
2334 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2335 p = xdr_reserve_space(xdr, 8);
2336 if (!p)
1da177e4 2337 goto out_resource;
b64c7f3b 2338 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2339 }
81c3f413 2340 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2341 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2342 if (status)
2343 goto out;
2344 }
1da177e4 2345 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2346 p = xdr_reserve_space(xdr, 4);
2347 if (!p)
1da177e4 2348 goto out_resource;
c373b0a4 2349 *p++ = cpu_to_be32(1);
1da177e4
LT		 2350 }
2351 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2352 p = xdr_reserve_space(xdr, 8);
2353 if (!p)
1da177e4 2354 goto out_resource;
b64c7f3b 2355 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2356 }
2357 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2358 p = xdr_reserve_space(xdr, 4);
2359 if (!p)
1da177e4 2360 goto out_resource;
c373b0a4 2361 *p++ = cpu_to_be32(255);
1da177e4
LT		 2362 }
2363 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2364 p = xdr_reserve_space(xdr, 4);
2365 if (!p)
1da177e4 2366 goto out_resource;
c373b0a4 2367 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2368 }
2369 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2370 p = xdr_reserve_space(xdr, 8);
2371 if (!p)
1da177e4 2372 goto out_resource;
b64c7f3b 2373 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2374 }
2375 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2376 p = xdr_reserve_space(xdr, 8);
2377 if (!p)
1da177e4 2378 goto out_resource;
b64c7f3b 2379 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2380 }
2381 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2382 p = xdr_reserve_space(xdr, 4);
2383 if (!p)
1da177e4 2384 goto out_resource;
c373b0a4 2385 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2386 }
2387 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2388 p = xdr_reserve_space(xdr, 4);
2389 if (!p)
1da177e4 2390 goto out_resource;
c373b0a4 2391 *p++ = cpu_to_be32(1);
1da177e4
LT		 2392 }
2393 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2394 p = xdr_reserve_space(xdr, 4);
2395 if (!p)
1da177e4 2396 goto out_resource;
c373b0a4 2397 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2398 }
2399 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2400 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2401 if (status)
2402 goto out;
2403 }
2404 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2405 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2406 if (status)
2407 goto out;
2408 }
2409 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2410 p = xdr_reserve_space(xdr, 8);
2411 if (!p)
1da177e4 2412 goto out_resource;
c373b0a4
BF		 2413 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2414 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2415 }
2416 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2417 p = xdr_reserve_space(xdr, 8);
2418 if (!p)
1da177e4
LT		 2419 goto out_resource;
2420 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2421 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2422 }
2423 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2424 p = xdr_reserve_space(xdr, 8);
2425 if (!p)
1da177e4
LT		 2426 goto out_resource;
2427 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2428 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2429 }
2430 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2431 p = xdr_reserve_space(xdr, 8);
2432 if (!p)
1da177e4
LT		 2433 goto out_resource;
2434 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2435 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2436 }
2437 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2438 p = xdr_reserve_space(xdr, 8);
2439 if (!p)
1da177e4
LT		 2440 goto out_resource;
2441 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2442 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2443 }
2444 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2445 p = xdr_reserve_space(xdr, 12);
2446 if (!p)
1da177e4 2447 goto out_resource;
b64c7f3b 2448 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2449 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2450 }
2451 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2452 p = xdr_reserve_space(xdr, 12);
2453 if (!p)
1da177e4 2454 goto out_resource;
c373b0a4
BF		 2455 *p++ = cpu_to_be32(0);
2456 *p++ = cpu_to_be32(1);
2457 *p++ = cpu_to_be32(0);
1da177e4
LT		 2458 }
2459 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2460 p = xdr_reserve_space(xdr, 12);
2461 if (!p)
1da177e4 2462 goto out_resource;
b64c7f3b 2463 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2464 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2465 }
2466 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2467 p = xdr_reserve_space(xdr, 12);
2468 if (!p)
1da177e4 2469 goto out_resource;
b64c7f3b 2470 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2471 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2472 }
2473 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2474 p = xdr_reserve_space(xdr, 8);
2475 if (!p)
1da177e4 2476 goto out_resource;
406a7ea9
FF		 2477 /*
2478 * Get parent's attributes if not ignoring crossmount
2479 * and this is the root of a cross-mounted filesystem.
2480 */
2481 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2482 dentry == exp->ex_path.mnt->mnt_root)
2483 get_parent_attributes(exp, &stat);
b64c7f3b 2484 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2485 }
18032ca0 2486 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2487 status = nfsd4_encode_security_label(xdr, rqstp, context,
2488 contextlen);
18032ca0
DQ		 2489 if (status)
2490 goto out;
2491 }
8c18f205 2492 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2493 p = xdr_reserve_space(xdr, 16);
2494 if (!p)
de3997a7 2495 goto out_resource;
c373b0a4
BF		 2496 *p++ = cpu_to_be32(3);
2497 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2498 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2499 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2500 }
7e705706 2501
082d4bd7
BF		 2502 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2503 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2504 status = nfs_ok;
2505
2506out:
ba4e55bb 2507#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2508 if (context)
2509 security_release_secctx(context, contextlen);
ba4e55bb 2510#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2511 kfree(acl);
18df11d0 2512 if (tempfh) {
d50e6136 2513 fh_put(tempfh);
18df11d0
YZ		 2514 kfree(tempfh);
2515 }
1fcea5b2
BF		 2516 if (status)
2517 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2518 return status;
2519out_nfserr:
b8dd7b9a 2520 status = nfserrno(err);
1da177e4
LT		 2521 goto out;
2522out_resource:
1da177e4
LT		 2523 status = nfserr_resource;
2524 goto out;
1da177e4
LT		 2525}
2526
2825a7f9
BF		 2527static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2528 struct xdr_buf *buf, __be32 *p, int bytes)
2529{
2530 xdr->scratch.iov_len = 0;
2531 memset(buf, 0, sizeof(struct xdr_buf));
2532 buf->head[0].iov_base = p;
2533 buf->head[0].iov_len = 0;
2534 buf->len = 0;
2535 xdr->buf = buf;
2536 xdr->iov = buf->head;
2537 xdr->p = p;
2538 xdr->end = (void *)p + bytes;
2539 buf->buflen = bytes;
2540}
2541
d5184658
BF		 2542__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2543 struct svc_fh *fhp, struct svc_export *exp,
2544 struct dentry *dentry, u32 *bmval,
2545 struct svc_rqst *rqstp, int ignore_crossmnt)
2546{
2825a7f9 2547 struct xdr_buf dummy;
d5184658
BF		 2548 struct xdr_stream xdr;
2549 __be32 ret;
2550
2825a7f9 2551 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2552 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2553 ignore_crossmnt);
2554 *p = xdr.p;
2555 return ret;
2556}
2557
c0ce6ec8
BF		 2558static inline int attributes_need_mount(u32 *bmval)
2559{
2560 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2561 return 1;
2562 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2563 return 1;
2564 return 0;
2565}
2566
b37ad28b 2567static __be32
561f0ed4
BF		 2568nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2569 const char *name, int namlen)
1da177e4
LT		 2570{
2571 struct svc_export *exp = cd->rd_fhp->fh_export;
2572 struct dentry *dentry;
b37ad28b 2573 __be32 nfserr;
406a7ea9 2574 int ignore_crossmnt = 0;
1da177e4
LT		 2575
2576 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2577 if (IS_ERR(dentry))
2578 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2579 if (!dentry->d_inode) {
2580 /*
2581 * nfsd_buffered_readdir drops the i_mutex between
2582 * readdir and calling this callback, leaving a window
2583 * where this directory entry could have gone away.
2584 */
2585 dput(dentry);
2586 return nfserr_noent;
2587 }
1da177e4
LT		 2588
2589 exp_get(exp);
406a7ea9
FF		 2590 /*
2591 * In the case of a mountpoint, the client may be asking for
2592 * attributes that are only properties of the underlying filesystem
2593 * as opposed to the cross-mounted file system. In such a case,
2594 * we will not follow the cross mount and will fill the attribtutes
2595 * directly from the mountpoint dentry.
2596 */
3227fa41 2597 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2598 int err;
2599
3227fa41
BF		 2600 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2601 && !attributes_need_mount(cd->rd_bmval)) {
2602 ignore_crossmnt = 1;
2603 goto out_encode;
2604 }
dcb488a3
AA		 2605 /*
2606 * Why the heck aren't we just using nfsd_lookup??
2607 * Different "."/".." handling? Something else?
2608 * At least, add a comment here to explain....
2609 */
021d3a72
BF		 2610 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2611 if (err) {
2612 nfserr = nfserrno(err);
1da177e4
LT		 2613 goto out_put;
2614 }
dcb488a3
AA		 2615 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2616 if (nfserr)
2617 goto out_put;
1da177e4
LT		 2618
2619 }
3227fa41 2620out_encode:
561f0ed4 2621 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2622 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2623out_put:
2624 dput(dentry);
2625 exp_put(exp);
2626 return nfserr;
2627}
2628
2ebbc012 2629static __be32 *
561f0ed4 2630nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2631{
561f0ed4
BF		 2632 __be32 *p;
2633
2634 p = xdr_reserve_space(xdr, 6);
2635 if (!p)
1da177e4
LT		 2636 return NULL;
2637 *p++ = htonl(2);
2638 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2639 *p++ = htonl(0); /* bmval1 */
2640
87915c64 2641 *p++ = htonl(4); /* attribute length */
1da177e4 2642 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2643 return p;
2644}
2645
2646static int
a0ad13ef
N		 2647nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2648 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2649{
a0ad13ef 2650 struct readdir_cd *ccd = ccdv;
1da177e4 2651 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2652 struct xdr_stream *xdr = cd->xdr;
2653 int start_offset = xdr->buf->len;
2654 int cookie_offset;
2655 int entry_bytes;
b37ad28b 2656 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2657 __be64 wire_offset;
2658 __be32 *p;
1da177e4
LT		 2659
2660 /* In nfsv4, "." and ".." never make it onto the wire.. */
2661 if (name && isdotent(name, namlen)) {
2662 cd->common.err = nfs_ok;
2663 return 0;
2664 }
2665
561f0ed4
BF		 2666 if (cd->cookie_offset) {
2667 wire_offset = cpu_to_be64(offset);
2668 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2669 &wire_offset, 8);
2670 }
1da177e4 2671
561f0ed4
BF		 2672 p = xdr_reserve_space(xdr, 4);
2673 if (!p)
1da177e4 2674 goto fail;
1da177e4 2675 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2676 cookie_offset = xdr->buf->len;
2677 p = xdr_reserve_space(xdr, 3*4 + namlen);
2678 if (!p)
2679 goto fail;
1da177e4
LT		 2680 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2681 p = xdr_encode_array(p, name, namlen); /* name length & name */
2682
561f0ed4 2683 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2684 switch (nfserr) {
2685 case nfs_ok:
1da177e4
LT		 2686 break;
2687 case nfserr_resource:
2688 nfserr = nfserr_toosmall;
2689 goto fail;
b2c0cea6
BF		 2690 case nfserr_noent:
2691 goto skip_entry;
1da177e4
LT		 2692 default:
2693 /*
2694 * If the client requested the RDATTR_ERROR attribute,
2695 * we stuff the error code into this attribute
2696 * and continue. If this attribute was not requested,
2697 * then in accordance with the spec, we fail the
2698 * entire READDIR operation(!)
2699 */
2700 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2701 goto fail;
561f0ed4 2702 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2703 if (p == NULL) {
2704 nfserr = nfserr_toosmall;
1da177e4 2705 goto fail;
34081efc 2706 }
1da177e4 2707 }
561f0ed4
BF		 2708 nfserr = nfserr_toosmall;
2709 entry_bytes = xdr->buf->len - start_offset;
2710 if (entry_bytes > cd->rd_maxcount)
2711 goto fail;
2712 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2713 if (!cd->rd_dircount)
2714 goto fail;
2715 cd->rd_dircount--;
561f0ed4 2716 cd->cookie_offset = cookie_offset;
b2c0cea6 2717skip_entry:
1da177e4
LT		 2718 cd->common.err = nfs_ok;
2719 return 0;
2720fail:
561f0ed4 2721 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2722 cd->common.err = nfserr;
2723 return -EINVAL;
2724}
2725
d0a381dd
BF		 2726static __be32
2727nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2728{
bc749ca4 2729 __be32 *p;
e2f282b9 2730
d0a381dd
BF		 2731 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2732 if (!p)
2733 return nfserr_resource;
c373b0a4 2734 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2735 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2736 sizeof(stateid_opaque_t));
d0a381dd 2737 return 0;
e2f282b9
BH		 2738}
2739
695e12f8 2740static __be32
b37ad28b 2741nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2742{
d0a381dd 2743 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2744 __be32 *p;
1da177e4
LT		 2745
2746 if (!nfserr) {
d0a381dd
BF		 2747 p = xdr_reserve_space(xdr, 8);
2748 if (!p)
2749 return nfserr_resource;
c373b0a4
BF		 2750 *p++ = cpu_to_be32(access->ac_supported);
2751 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2752 }
695e12f8 2753 return nfserr;
1da177e4
LT		 2754}
2755
1d1bc8f2
BF		 2756static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2757{
d0a381dd 2758 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2759 __be32 *p;
2760
2761 if (!nfserr) {
d0a381dd
BF		 2762 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2763 if (!p)
2764 return nfserr_resource;
0c0c267b
BF		 2765 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2766 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2767 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2768 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2769 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2770 }
2771 return nfserr;
2772}
2773
695e12f8 2774static __be32
b37ad28b 2775nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2776{
d0a381dd
BF		 2777 struct xdr_stream *xdr = &resp->xdr;
2778
e2f282b9 2779 if (!nfserr)
d0a381dd 2780 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2781
695e12f8 2782 return nfserr;
1da177e4
LT		 2783}
2784
2785
695e12f8 2786static __be32
b37ad28b 2787nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2788{
d0a381dd 2789 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2790 __be32 *p;
1da177e4
LT		 2791
2792 if (!nfserr) {
d0a381dd
BF		 2793 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2794 if (!p)
2795 return nfserr_resource;
0c0c267b
BF		 2796 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2797 NFS4_VERIFIER_SIZE);
1da177e4 2798 }
695e12f8 2799 return nfserr;
1da177e4
LT		 2800}
2801
695e12f8 2802static __be32
b37ad28b 2803nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2804{
d0a381dd 2805 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2806 __be32 *p;
1da177e4
LT		 2807
2808 if (!nfserr) {
d0a381dd
BF		 2809 p = xdr_reserve_space(xdr, 32);
2810 if (!p)
2811 return nfserr_resource;
d05d5744 2812 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2813 *p++ = cpu_to_be32(2);
2814 *p++ = cpu_to_be32(create->cr_bmval[0]);
2815 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2816 }
695e12f8 2817 return nfserr;
1da177e4
LT		 2818}
2819
b37ad28b
AV		 2820static __be32
2821nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2822{
2823 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2824 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2825
2826 if (nfserr)
2827 return nfserr;
2828
d5184658
BF		 2829 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2830 getattr->ga_bmval,
406a7ea9 2831 resp->rqstp, 0);
1da177e4
LT		 2832 return nfserr;
2833}
2834
695e12f8
BH		 2835static __be32
2836nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2837{
d0a381dd 2838 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2839 struct svc_fh *fhp = *fhpp;
1da177e4 2840 unsigned int len;
bc749ca4 2841 __be32 *p;
1da177e4
LT		 2842
2843 if (!nfserr) {
2844 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2845 p = xdr_reserve_space(xdr, len + 4);
2846 if (!p)
2847 return nfserr_resource;
0c0c267b 2848 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2849 }
695e12f8 2850 return nfserr;
1da177e4
LT		 2851}
2852
2853/*
2854* Including all fields other than the name, a LOCK4denied structure requires
2855* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2856*/
d0a381dd
BF		 2857static __be32
2858nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2859{
7c13f344 2860 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2861 __be32 *p;
1da177e4 2862
8c7424cf 2863again:
d0a381dd 2864 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2865 if (!p) {
2866 /*
2867 * Don't fail to return the result just because we can't
2868 * return the conflicting open:
2869 */
2870 if (conf->len) {
2871 conf->len = 0;
2872 conf->data = NULL;
2873 goto again;
2874 }
d0a381dd 2875 return nfserr_resource;
8c7424cf 2876 }
b64c7f3b
BF		 2877 p = xdr_encode_hyper(p, ld->ld_start);
2878 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2879 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2880 if (conf->len) {
0c0c267b
BF		 2881 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2882 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2883 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2884 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2885 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2886 }
d0a381dd 2887 return nfserr_denied;
1da177e4
LT		 2888}
2889
695e12f8 2890static __be32
b37ad28b 2891nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2892{
d0a381dd
BF		 2893 struct xdr_stream *xdr = &resp->xdr;
2894
e2f282b9 2895 if (!nfserr)
d0a381dd 2896 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2897 else if (nfserr == nfserr_denied)
d0a381dd 2898 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2899 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2900 return nfserr;
1da177e4
LT		 2901}
2902
695e12f8 2903static __be32
b37ad28b 2904nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2905{
d0a381dd
BF		 2906 struct xdr_stream *xdr = &resp->xdr;
2907
1da177e4 2908 if (nfserr == nfserr_denied)
d0a381dd 2909 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2910 return nfserr;
1da177e4
LT		 2911}
2912
695e12f8 2913static __be32
b37ad28b 2914nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2915{
d0a381dd
BF		 2916 struct xdr_stream *xdr = &resp->xdr;
2917
e2f282b9 2918 if (!nfserr)
d0a381dd 2919 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2920
695e12f8 2921 return nfserr;
1da177e4
LT		 2922}
2923
2924
695e12f8 2925static __be32
b37ad28b 2926nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2927{
d0a381dd 2928 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2929 __be32 *p;
1da177e4
LT		 2930
2931 if (!nfserr) {
d0a381dd
BF		 2932 p = xdr_reserve_space(xdr, 20);
2933 if (!p)
2934 return nfserr_resource;
d05d5744 2935 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2936 }
695e12f8 2937 return nfserr;
1da177e4
LT		 2938}
2939
2940
695e12f8 2941static __be32
b37ad28b 2942nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2943{
d0a381dd 2944 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2945 __be32 *p;
1da177e4
LT		 2946
2947 if (nfserr)
2948 goto out;
2949
d0a381dd
BF		 2950 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2951 if (nfserr)
2952 goto out;
2953 p = xdr_reserve_space(xdr, 40);
2954 if (!p)
2955 return nfserr_resource;
d05d5744 2956 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2957 *p++ = cpu_to_be32(open->op_rflags);
2958 *p++ = cpu_to_be32(2);
2959 *p++ = cpu_to_be32(open->op_bmval[0]);
2960 *p++ = cpu_to_be32(open->op_bmval[1]);
2961 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2962
2963 switch (open->op_delegate_type) {
2964 case NFS4_OPEN_DELEGATE_NONE:
2965 break;
2966 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2967 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2968 if (nfserr)
2969 return nfserr;
2970 p = xdr_reserve_space(xdr, 20);
2971 if (!p)
2972 return nfserr_resource;
c373b0a4 2973 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2974
2975 /*
2976 * TODO: ACE's in delegations
2977 */
c373b0a4
BF		 2978 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2979 *p++ = cpu_to_be32(0);
2980 *p++ = cpu_to_be32(0);
2981 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2982 break;
2983 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2984 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2985 if (nfserr)
2986 return nfserr;
2987 p = xdr_reserve_space(xdr, 32);
2988 if (!p)
2989 return nfserr_resource;
c373b0a4 2990 *p++ = cpu_to_be32(0);
1da177e4
LT		 2991
2992 /*
2993 * TODO: space_limit's in delegations
2994 */
c373b0a4
BF		 2995 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
2996 *p++ = cpu_to_be32(~(u32)0);
2997 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 2998
2999 /*
3000 * TODO: ACE's in delegations
3001 */
c373b0a4
BF		 3002 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3003 *p++ = cpu_to_be32(0);
3004 *p++ = cpu_to_be32(0);
3005 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3006 break;
d24433cd
BH		 3007 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3008 switch (open->op_why_no_deleg) {
3009 case WND4_CONTENTION:
3010 case WND4_RESOURCE:
d0a381dd
BF		 3011 p = xdr_reserve_space(xdr, 8);
3012 if (!p)
3013 return nfserr_resource;
c373b0a4
BF		 3014 *p++ = cpu_to_be32(open->op_why_no_deleg);
3015 /* deleg signaling not supported yet: */
3016 *p++ = cpu_to_be32(0);
d24433cd
BH		 3017 break;
3018 default:
d0a381dd
BF		 3019 p = xdr_reserve_space(xdr, 4);
3020 if (!p)
3021 return nfserr_resource;
c373b0a4 3022 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3023 }
d24433cd 3024 break;
1da177e4
LT		 3025 default:
3026 BUG();
3027 }
3028 /* XXX save filehandle here */
3029out:
695e12f8 3030 return nfserr;
1da177e4
LT		 3031}
3032
695e12f8 3033static __be32
b37ad28b 3034nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3035{
d0a381dd
BF		 3036 struct xdr_stream *xdr = &resp->xdr;
3037
e2f282b9 3038 if (!nfserr)
d0a381dd 3039 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3040
695e12f8 3041 return nfserr;
1da177e4
LT		 3042}
3043
695e12f8 3044static __be32
b37ad28b 3045nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3046{
d0a381dd
BF		 3047 struct xdr_stream *xdr = &resp->xdr;
3048
e2f282b9 3049 if (!nfserr)
d0a381dd 3050 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3051
695e12f8 3052 return nfserr;
1da177e4
LT		 3053}
3054
dc97618d
BF		 3055static __be32 nfsd4_encode_splice_read(
3056 struct nfsd4_compoundres *resp,
3057 struct nfsd4_read *read,
3058 struct file *file, unsigned long maxcount)
1da177e4 3059{
ddd1ea56 3060 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3061 struct xdr_buf *buf = xdr->buf;
dc97618d 3062 u32 eof;
30596768 3063 int space_left;
dc97618d 3064 __be32 nfserr;
fec25fa4 3065 __be32 *p = xdr->p - 2;
1da177e4 3066
dc97618d
BF		 3067 /*
3068 * Don't inline pages unless we know there's room for eof,
3069 * count, and possible padding:
3070 */
3071 if (xdr->end - xdr->p < 3)
d0a381dd 3072 return nfserr_resource;
dc97618d
BF		 3073
3074 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3075 read->rd_offset, &maxcount);
3076 if (nfserr) {
3077 /*
3078 * nfsd_splice_actor may have already messed with the
3079 * page length; reset it so as not to confuse
3080 * xdr_truncate_encode:
3081 */
34a78b48 3082 buf->page_len = 0;
dc97618d 3083 return nfserr;
b0e35fda 3084 }
1da177e4 3085
dc97618d
BF		 3086 eof = (read->rd_offset + maxcount >=
3087 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3088
fec25fa4
BF		 3089 *(p++) = htonl(eof);
3090 *(p++) = htonl(maxcount);
dc97618d 3091
34a78b48
BF		 3092 buf->page_len = maxcount;
3093 buf->len += maxcount;
dc97618d 3094 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3095
3096 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3097 buf->tail[0].iov_base = xdr->p;
3098 buf->tail[0].iov_len = 0;
fec25fa4 3099 xdr->iov = buf->tail;
dc97618d 3100 if (maxcount&3) {
fec25fa4
BF		 3101 int pad = 4 - (maxcount&3);
3102
3103 *(xdr->p++) = 0;
3104
34a78b48 3105 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3106 buf->tail[0].iov_len = pad;
3107 buf->len += pad;
b0e35fda 3108 }
2825a7f9 3109
dc97618d 3110 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3111 buf->buflen - buf->len);
3112 buf->buflen = buf->len + space_left;
dc97618d
BF		 3113 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3114
3115 return 0;
3116}
3117
3118static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3119 struct nfsd4_read *read,
3120 struct file *file, unsigned long maxcount)
3121{
3122 struct xdr_stream *xdr = &resp->xdr;
3123 u32 eof;
3124 int v;
dc97618d 3125 int starting_len = xdr->buf->len - 8;
dc97618d 3126 long len;
b0420980 3127 int thislen;
dc97618d
BF		 3128 __be32 nfserr;
3129 __be32 tmp;
3130 __be32 *p;
b0420980
BF		 3131 u32 zzz = 0;
3132 int pad;
1da177e4
LT		 3133
3134 len = maxcount;
3135 v = 0;
6ff9897d 3136
b0420980
BF		 3137 thislen = (void *)xdr->end - (void *)xdr->p;
3138 if (len < thislen)
3139 thislen = len;
3140 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3141 WARN_ON_ONCE(!p);
3142 resp->rqstp->rq_vec[v].iov_base = p;
3143 resp->rqstp->rq_vec[v].iov_len = thislen;
3144 v++;
3145 len -= thislen;
3146
3147 while (len) {
6ff9897d 3148 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3149 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3150 WARN_ON_ONCE(!p);
3151 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3152 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3153 v++;
6ff9897d 3154 len -= thislen;
1da177e4
LT		 3155 }
3156 read->rd_vlen = v;
3157
dc97618d
BF		 3158 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3159 read->rd_vlen, &maxcount);
3160 if (nfserr)
1da177e4 3161 return nfserr;
b0420980 3162 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3163
44524359
N		 3164 eof = (read->rd_offset + maxcount >=
3165 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3166
dc97618d
BF		 3167 tmp = htonl(eof);
3168 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3169 tmp = htonl(maxcount);
3170 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3171
b0420980
BF		 3172 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3173 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3174 &zzz, pad);
1da177e4 3175 return 0;
dc97618d
BF		 3176
3177}
3178
3179static __be32
3180nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3181 struct nfsd4_read *read)
3182{
3183 unsigned long maxcount;
3184 struct xdr_stream *xdr = &resp->xdr;
3185 struct file *file = read->rd_filp;
3186 int starting_len = xdr->buf->len;
3187 struct raparms *ra;
3188 __be32 *p;
3189 __be32 err;
3190
3191 if (nfserr)
3192 return nfserr;
3193
3194 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3195 if (!p) {
3196 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3197 return nfserr_resource;
3198 }
b0420980
BF		 3199 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3200 WARN_ON_ONCE(1);
dc97618d
BF		 3201 return nfserr_resource;
3202 }
dc97618d
BF		 3203 xdr_commit_encode(xdr);
3204
3205 maxcount = svc_max_payload(resp->rqstp);
b0420980
BF		 3206 if (maxcount > xdr->buf->buflen - xdr->buf->len)
3207 maxcount = xdr->buf->buflen - xdr->buf->len;
dc97618d
BF		 3208 if (maxcount > read->rd_length)
3209 maxcount = read->rd_length;
3210
3211 if (!read->rd_filp) {
3212 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3213 &file, &ra);
3214 if (err)
3215 goto err_truncate;
3216 }
3217
3218 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3219 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3220 else
3221 err = nfsd4_encode_readv(resp, read, file, maxcount);
3222
3223 if (!read->rd_filp)
3224 nfsd_put_tmp_read_open(file, ra);
3225
3226err_truncate:
3227 if (err)
3228 xdr_truncate_encode(xdr, starting_len);
3229 return err;
1da177e4
LT		 3230}
3231
b37ad28b
AV		 3232static __be32
3233nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3234{
3235 int maxcount;
476a7b1f
BF		 3236 __be32 wire_count;
3237 int zero = 0;
ddd1ea56 3238 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3239 int length_offset = xdr->buf->len;
bc749ca4 3240 __be32 *p;
1da177e4
LT		 3241
3242 if (nfserr)
3243 return nfserr;
2825a7f9
BF		 3244
3245 p = xdr_reserve_space(xdr, 4);
3246 if (!p)
3247 return nfserr_resource;
1da177e4 3248 maxcount = PAGE_SIZE;
d0a381dd 3249
476a7b1f
BF		 3250 p = xdr_reserve_space(xdr, maxcount);
3251 if (!p)
4e21ac4b 3252 return nfserr_resource;
1da177e4
LT		 3253 /*
3254 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3255 * if they would overflow the buffer. Is this kosher in NFSv4? If
3256 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3257 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3258 */
476a7b1f
BF		 3259 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3260 (char *)p, &maxcount);
1da177e4 3261 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3262 nfserr = nfserr_inval;
3263 if (nfserr) {
1fcea5b2 3264 xdr_truncate_encode(xdr, length_offset);
1da177e4 3265 return nfserr;
d3f627c8 3266 }
1da177e4 3267
476a7b1f
BF		 3268 wire_count = htonl(maxcount);
3269 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3270 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3271 if (maxcount & 3)
3272 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3273 &zero, 4 - (maxcount&3));
1da177e4
LT		 3274 return 0;
3275}
3276
b37ad28b
AV		 3277static __be32
3278nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3279{
3280 int maxcount;
561f0ed4 3281 int bytes_left;
1da177e4 3282 loff_t offset;
561f0ed4 3283 __be64 wire_offset;
ddd1ea56 3284 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3285 int starting_len = xdr->buf->len;
bc749ca4 3286 __be32 *p;
1da177e4
LT		 3287
3288 if (nfserr)
3289 return nfserr;
1da177e4 3290
d0a381dd
BF		 3291 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3292 if (!p)
3293 return nfserr_resource;
1da177e4
LT		 3294
3295 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3296 *p++ = cpu_to_be32(0);
3297 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3298 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3299 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3300
3301 /*
561f0ed4
BF		 3302 * Number of bytes left for directory entries allowing for the
3303 * final 8 bytes of the readdir and a following failed op:
3304 */
3305 bytes_left = xdr->buf->buflen - xdr->buf->len
3306 - COMPOUND_ERR_SLACK_SPACE - 8;
3307 if (bytes_left < 0) {
3308 nfserr = nfserr_resource;
3309 goto err_no_verf;
3310 }
3311 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3312 /*
3313 * Note the rfc defines rd_maxcount as the size of the
3314 * READDIR4resok structure, which includes the verifier above
3315 * and the 8 bytes encoded at the end of this function:
1da177e4 3316 */
561f0ed4
BF		 3317 if (maxcount < 16) {
3318 nfserr = nfserr_toosmall;
1da177e4
LT		 3319 goto err_no_verf;
3320 }
561f0ed4 3321 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3322
561f0ed4
BF		 3323 readdir->xdr = xdr;
3324 readdir->rd_maxcount = maxcount;
1da177e4 3325 readdir->common.err = 0;
561f0ed4 3326 readdir->cookie_offset = 0;
1da177e4
LT		 3327
3328 offset = readdir->rd_cookie;
3329 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3330 &offset,
3331 &readdir->common, nfsd4_encode_dirent);
3332 if (nfserr == nfs_ok &&
3333 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3334 xdr->buf->len == starting_len + 8) {
3335 /* nothing encoded; which limit did we hit?: */
3336 if (maxcount - 16 < bytes_left)
3337 /* It was the fault of rd_maxcount: */
3338 nfserr = nfserr_toosmall;
3339 else
3340 /* We ran out of buffer space: */
3341 nfserr = nfserr_resource;
3342 }
1da177e4
LT		 3343 if (nfserr)
3344 goto err_no_verf;
3345
561f0ed4
BF		 3346 if (readdir->cookie_offset) {
3347 wire_offset = cpu_to_be64(offset);
3348 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3349 &wire_offset, 8);
3350 }
1da177e4 3351
561f0ed4
BF		 3352 p = xdr_reserve_space(xdr, 8);
3353 if (!p) {
3354 WARN_ON_ONCE(1);
3355 goto err_no_verf;
3356 }
1da177e4
LT		 3357 *p++ = 0; /* no more entries */
3358 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3359
3360 return 0;
3361err_no_verf:
1fcea5b2 3362 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3363 return nfserr;
3364}
3365
695e12f8 3366static __be32
b37ad28b 3367nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3368{
d0a381dd 3369 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3370 __be32 *p;
1da177e4
LT		 3371
3372 if (!nfserr) {
d0a381dd
BF		 3373 p = xdr_reserve_space(xdr, 20);
3374 if (!p)
3375 return nfserr_resource;
d05d5744 3376 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3377 }
695e12f8 3378 return nfserr;
1da177e4
LT		 3379}
3380
695e12f8 3381static __be32
b37ad28b 3382nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3383{
d0a381dd 3384 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3385 __be32 *p;
1da177e4
LT		 3386
3387 if (!nfserr) {
d0a381dd
BF		 3388 p = xdr_reserve_space(xdr, 40);
3389 if (!p)
3390 return nfserr_resource;
d05d5744
BF		 3391 p = encode_cinfo(p, &rename->rn_sinfo);
3392 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3393 }
695e12f8 3394 return nfserr;
1da177e4
LT		 3395}
3396
695e12f8 3397static __be32
d0a381dd 3398nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3399 __be32 nfserr, struct svc_export *exp)
dcb488a3 3400{
676e4ebd 3401 u32 i, nflavs, supported;
4796f457
BF		 3402 struct exp_flavor_info *flavs;
3403 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3404 __be32 *p, *flavorsp;
3405 static bool report = true;
dcb488a3
AA		 3406
3407 if (nfserr)
3408 goto out;
d0a381dd 3409 nfserr = nfserr_resource;
4796f457
BF		 3410 if (exp->ex_nflavors) {
3411 flavs = exp->ex_flavors;
3412 nflavs = exp->ex_nflavors;
3413 } else { /* Handling of some defaults in absence of real secinfo: */
3414 flavs = def_flavs;
3415 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3416 nflavs = 2;
3417 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3418 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3419 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3420 nflavs = 1;
3421 flavs[0].pseudoflavor
3422 = svcauth_gss_flavor(exp->ex_client);
3423 } else {
3424 nflavs = 1;
3425 flavs[0].pseudoflavor
3426 = exp->ex_client->flavour->flavour;
3427 }
3428 }
3429
676e4ebd 3430 supported = 0;
d0a381dd
BF		 3431 p = xdr_reserve_space(xdr, 4);
3432 if (!p)
3433 goto out;
676e4ebd 3434 flavorsp = p++; /* to be backfilled later */
676e4ebd 3435
4796f457 3436 for (i = 0; i < nflavs; i++) {
676e4ebd 3437 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3438 struct rpcsec_gss_info info;
dcb488a3 3439
676e4ebd
CL		 3440 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3441 supported++;
d0a381dd
BF		 3442 p = xdr_reserve_space(xdr, 4 + 4 +
3443 XDR_LEN(info.oid.len) + 4 + 4);
3444 if (!p)
3445 goto out;
c373b0a4 3446 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3447 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3448 *p++ = cpu_to_be32(info.qop);
3449 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3450 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3451 supported++;
d0a381dd
BF		 3452 p = xdr_reserve_space(xdr, 4);
3453 if (!p)
3454 goto out;
c373b0a4 3455 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3456 } else {
3457 if (report)
3458 pr_warn("NFS: SECINFO: security flavor %u "
3459 "is not supported\n", pf);
dcb488a3
AA		 3460 }
3461 }
a77c806f 3462
676e4ebd
CL		 3463 if (nflavs != supported)
3464 report = false;
3465 *flavorsp = htonl(supported);
d0a381dd 3466 nfserr = 0;
dcb488a3
AA		 3467out:
3468 if (exp)
3469 exp_put(exp);
695e12f8 3470 return nfserr;
dcb488a3
AA		 3471}
3472
22b6dee8
MJ		 3473static __be32
3474nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3475 struct nfsd4_secinfo *secinfo)
3476{
d0a381dd
BF		 3477 struct xdr_stream *xdr = &resp->xdr;
3478
3479 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3480}
3481
3482static __be32
3483nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3484 struct nfsd4_secinfo_no_name *secinfo)
3485{
d0a381dd
BF		 3486 struct xdr_stream *xdr = &resp->xdr;
3487
3488 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3489}
3490
1da177e4
LT		 3491/*
3492 * The SETATTR encode routine is special -- it always encodes a bitmap,
3493 * regardless of the error status.
3494 */
695e12f8 3495static __be32
b37ad28b 3496nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3497{
d0a381dd 3498 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3499 __be32 *p;
1da177e4 3500
d0a381dd
BF		 3501 p = xdr_reserve_space(xdr, 16);
3502 if (!p)
3503 return nfserr_resource;
1da177e4 3504 if (nfserr) {
c373b0a4
BF		 3505 *p++ = cpu_to_be32(3);
3506 *p++ = cpu_to_be32(0);
3507 *p++ = cpu_to_be32(0);
3508 *p++ = cpu_to_be32(0);
1da177e4
LT		 3509 }
3510 else {
c373b0a4
BF		 3511 *p++ = cpu_to_be32(3);
3512 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3513 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3514 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3515 }
695e12f8 3516 return nfserr;
1da177e4
LT		 3517}
3518
695e12f8 3519static __be32
b37ad28b 3520nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3521{
d0a381dd 3522 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3523 __be32 *p;
1da177e4
LT		 3524
3525 if (!nfserr) {
d0a381dd
BF		 3526 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3527 if (!p)
3528 return nfserr_resource;
0c0c267b
BF		 3529 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3530 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3531 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3532 }
3533 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3534 p = xdr_reserve_space(xdr, 8);
3535 if (!p)
3536 return nfserr_resource;
c373b0a4
BF		 3537 *p++ = cpu_to_be32(0);
3538 *p++ = cpu_to_be32(0);
1da177e4 3539 }
695e12f8 3540 return nfserr;
1da177e4
LT		 3541}
3542
695e12f8 3543static __be32
b37ad28b 3544nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3545{
d0a381dd 3546 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3547 __be32 *p;
1da177e4
LT		 3548
3549 if (!nfserr) {
d0a381dd
BF		 3550 p = xdr_reserve_space(xdr, 16);
3551 if (!p)
3552 return nfserr_resource;
c373b0a4
BF		 3553 *p++ = cpu_to_be32(write->wr_bytes_written);
3554 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3555 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3556 NFS4_VERIFIER_SIZE);
1da177e4 3557 }
695e12f8 3558 return nfserr;
1da177e4
LT		 3559}
3560
57266a6e
BF		 3561static const u32 nfs4_minimal_spo_must_enforce[2] = {
3562 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3563 1 << (OP_EXCHANGE_ID - 32) |
3564 1 << (OP_CREATE_SESSION - 32) |
3565 1 << (OP_DESTROY_SESSION - 32) |
3566 1 << (OP_DESTROY_CLIENTID - 32)
3567};
3568
2db134eb 3569static __be32
57b7b43b 3570nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3571 struct nfsd4_exchange_id *exid)
3572{
d0a381dd 3573 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3574 __be32 *p;
0733d213
AA		 3575 char *major_id;
3576 char *server_scope;
3577 int major_id_sz;
3578 int server_scope_sz;
3579 uint64_t minor_id = 0;
3580
3581 if (nfserr)
3582 return nfserr;
3583
3584 major_id = utsname()->nodename;
3585 major_id_sz = strlen(major_id);
3586 server_scope = utsname()->nodename;
3587 server_scope_sz = strlen(server_scope);
3588
d0a381dd 3589 p = xdr_reserve_space(xdr,
0733d213
AA		 3590 8 /* eir_clientid */ +
3591 4 /* eir_sequenceid */ +
3592 4 /* eir_flags */ +
a8bb84bc 3593 4 /* spr_how */);
d0a381dd
BF		 3594 if (!p)
3595 return nfserr_resource;
0733d213 3596
0c0c267b 3597 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3598 *p++ = cpu_to_be32(exid->seqid);
3599 *p++ = cpu_to_be32(exid->flags);
0733d213 3600
c373b0a4 3601 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3602
57266a6e
BF		 3603 switch (exid->spa_how) {
3604 case SP4_NONE:
3605 break;
3606 case SP4_MACH_CRED:
a8bb84bc 3607 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3608 p = xdr_reserve_space(xdr, 16);
3609 if (!p)
3610 return nfserr_resource;
a8bb84bc 3611
57266a6e 3612 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3613 *p++ = cpu_to_be32(2);
3614 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3615 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3616 /* empty spo_must_allow bitmap: */
c373b0a4 3617 *p++ = cpu_to_be32(0);
a8bb84bc 3618
57266a6e
BF		 3619 break;
3620 default:
3621 WARN_ON_ONCE(1);
3622 }
0733d213 3623
d0a381dd 3624 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3625 8 /* so_minor_id */ +
3626 4 /* so_major_id.len */ +
3627 (XDR_QUADLEN(major_id_sz) * 4) +
3628 4 /* eir_server_scope.len */ +
3629 (XDR_QUADLEN(server_scope_sz) * 4) +
3630 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3631 if (!p)
3632 return nfserr_resource;
a8bb84bc 3633
0733d213 3634 /* The server_owner struct */
b64c7f3b 3635 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3636 /* major id */
0c0c267b 3637 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3638
3639 /* Server scope */
0c0c267b 3640 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3641
3642 /* Implementation id */
c373b0a4 3643 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3644 return 0;
2db134eb
AA		 3645}
3646
3647static __be32
57b7b43b 3648nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3649 struct nfsd4_create_session *sess)
3650{
d0a381dd 3651 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3652 __be32 *p;
ec6b5d7b
AA		 3653
3654 if (nfserr)
3655 return nfserr;
3656
d0a381dd
BF		 3657 p = xdr_reserve_space(xdr, 24);
3658 if (!p)
3659 return nfserr_resource;
0c0c267b
BF		 3660 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3661 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3662 *p++ = cpu_to_be32(sess->seqid);
3663 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3664
d0a381dd
BF		 3665 p = xdr_reserve_space(xdr, 28);
3666 if (!p)
3667 return nfserr_resource;
c373b0a4
BF		 3668 *p++ = cpu_to_be32(0); /* headerpadsz */
3669 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3670 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3671 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3672 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3673 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3674 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3675
3676 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3677 p = xdr_reserve_space(xdr, 4);
3678 if (!p)
3679 return nfserr_resource;
c373b0a4 3680 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3681 }
3682
d0a381dd
BF		 3683 p = xdr_reserve_space(xdr, 28);
3684 if (!p)
3685 return nfserr_resource;
c373b0a4
BF		 3686 *p++ = cpu_to_be32(0); /* headerpadsz */
3687 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3688 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3689 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3690 *p++ = cpu_to_be32(sess->back_channel.maxops);
3691 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3692 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3693
3694 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3695 p = xdr_reserve_space(xdr, 4);
3696 if (!p)
3697 return nfserr_resource;
c373b0a4 3698 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3699 }
3700 return 0;
2db134eb
AA		 3701}
3702
c47d832b 3703static __be32
57b7b43b 3704nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3705 struct nfsd4_sequence *seq)
3706{
d0a381dd 3707 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3708 __be32 *p;
b85d4c01
BH		 3709
3710 if (nfserr)
3711 return nfserr;
3712
d0a381dd
BF		 3713 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3714 if (!p)
3715 return nfserr_resource;
0c0c267b
BF		 3716 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3717 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3718 *p++ = cpu_to_be32(seq->seqid);
3719 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3720 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3721 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3722 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3723 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3724
f5236013 3725 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3726 return 0;
2db134eb
AA		 3727}
3728
2355c596 3729static __be32
57b7b43b 3730nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3731 struct nfsd4_test_stateid *test_stateid)
3732{
d0a381dd 3733 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3734 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3735 __be32 *p;
17456804 3736
a11fcce1
BF		 3737 if (nfserr)
3738 return nfserr;
3739
d0a381dd
BF		 3740 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3741 if (!p)
3742 return nfserr_resource;
17456804 3743 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3744
03cfb420 3745 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3746 *p++ = stateid->ts_id_status;
17456804 3747 }
17456804
BS		 3748
3749 return nfserr;
3750}
3751
695e12f8
BH		 3752static __be32
3753nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3754{
3755 return nfserr;
3756}
3757
3758typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3759
2db134eb
AA		 3760/*
3761 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3762 * since we don't need to filter out obsolete ops as this is
3763 * done in the decoding phase.
3764 */
695e12f8 3765static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3766 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3767 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3768 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3769 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3770 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3771 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3772 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3773 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3774 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3775 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3776 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3777 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3778 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3779 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3780 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3781 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3782 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3783 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3784 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3785 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3786 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3787 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3788 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3789 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3790 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3791 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3792 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3793 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3794 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3795 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3796 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3797 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3798 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3799 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3800 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3801 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3802 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3803
3804 /* NFSv4.1 operations */
3805 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3806 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3807 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3808 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3809 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3810 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3811 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3812 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3813 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3817 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3818 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3819 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3820 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3821 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3822 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3823 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3824};
3825
496c262c 3826/*
a8095f7e
BF		 3827 * Calculate whether we still have space to encode repsize bytes.
3828 * There are two considerations:
3829 * - For NFS versions >=4.1, the size of the reply must stay within
3830 * session limits
3831 * - For all NFS versions, we must stay within limited preallocated
3832 * buffer space.
496c262c 3833 *
a8095f7e
BF		 3834 * This is called before the operation is processed, so can only provide
3835 * an upper estimate. For some nonidempotent operations (such as
3836 * getattr), it's not necessarily a problem if that estimate is wrong,
3837 * as we can fail it after processing without significant side effects.
496c262c 3838 */
a8095f7e 3839__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3840{
67492c99 3841 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3842 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3843
47ee5298
BF		 3844 if (buf->len + respsize <= buf->buflen)
3845 return nfs_ok;
3846 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3847 return nfserr_resource;
47ee5298
BF		 3848 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3849 WARN_ON_ONCE(1);
3850 return nfserr_rep_too_big_to_cache;
ea8d7720 3851 }
47ee5298 3852 return nfserr_rep_too_big;
496c262c
AA		 3853}
3854
1da177e4
LT		 3855void
3856nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3857{
082d4bd7 3858 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3859 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3860 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3861 int post_err_offset;
07d1f802 3862 nfsd4_enc encoder;
bc749ca4 3863 __be32 *p;
1da177e4 3864
d0a381dd
BF		 3865 p = xdr_reserve_space(xdr, 8);
3866 if (!p) {
3867 WARN_ON_ONCE(1);
3868 return;
3869 }
c373b0a4 3870 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3871 post_err_offset = xdr->buf->len;
1da177e4 3872
695e12f8
BH		 3873 if (op->opnum == OP_ILLEGAL)
3874 goto status;
3875 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3876 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3877 encoder = nfsd4_enc_ops[op->opnum];
3878 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3879 xdr_commit_encode(xdr);
3880
067e1ace 3881 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3882 if (!op->status) {
3883 int space_needed = 0;
3884 if (!nfsd4_last_compound_op(rqstp))
3885 space_needed = COMPOUND_ERR_SLACK_SPACE;
3886 op->status = nfsd4_check_resp_size(resp, space_needed);
3887 }
c8f13d97
BF		 3888 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3889 struct nfsd4_slot *slot = resp->cstate.slot;
3890
3891 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3892 op->status = nfserr_rep_too_big_to_cache;
3893 else
3894 op->status = nfserr_rep_too_big;
3895 }
07d1f802
BF		 3896 if (op->status == nfserr_resource ||
3897 op->status == nfserr_rep_too_big ||
3898 op->status == nfserr_rep_too_big_to_cache) {
3899 /*
3900 * The operation may have already been encoded or
3901 * partially encoded. No op returns anything additional
3902 * in the case of one of these three errors, so we can
3903 * just truncate back to after the status. But it's a
3904 * bug if we had to do this on a non-idempotent op:
3905 */
3906 warn_on_nonidempotent_op(op);
082d4bd7 3907 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3908 }
9411b1d4 3909 if (so) {
082d4bd7
BF		 3910 int len = xdr->buf->len - post_err_offset;
3911
9411b1d4 3912 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3913 so->so_replay.rp_buflen = len;
3914 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3915 so->so_replay.rp_buf, len);
9411b1d4 3916 }
695e12f8 3917status:
082d4bd7
BF		 3918 /* Note that op->status is already in network byte order: */
3919 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3920}
3921
3922/*
3923 * Encode the reply stored in the stateowner reply cache
3924 *
3925 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3926 * previously sent already encoded operation.
3927 *
3928 * called with nfs4_lock_state() held
3929 */
3930void
d0a381dd 3931nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3932{
bc749ca4 3933 __be32 *p;
1da177e4
LT		 3934 struct nfs4_replay *rp = op->replay;
3935
3936 BUG_ON(!rp);
3937
d0a381dd
BF		 3938 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3939 if (!p) {
3940 WARN_ON_ONCE(1);
3941 return;
3942 }
c373b0a4 3943 *p++ = cpu_to_be32(op->opnum);
1da177e4 3944 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3945
0c0c267b 3946 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3947}
3948
1da177e4 3949int
2ebbc012 3950nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3951{
3952 return xdr_ressize_check(rqstp, p);
3953}
3954
3e98abff 3955int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3956{
3e98abff
BF		 3957 struct svc_rqst *rqstp = rq;
3958 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3959
1da177e4
LT		 3960 if (args->ops != args->iops) {
3961 kfree(args->ops);
3962 args->ops = args->iops;
3963 }
f99d49ad
JJ		 3964 kfree(args->tmpp);
3965 args->tmpp = NULL;
1da177e4
LT		 3966 while (args->to_free) {
3967 struct tmpbuf *tb = args->to_free;
3968 args->to_free = tb->next;
3969 tb->release(tb->buf);
3970 kfree(tb);
3971 }
3e98abff 3972 return 1;
1da177e4
LT		 3973}
3974
3975int
2ebbc012 3976nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3977{
e874f9f8
JL		 3978 if (rqstp->rq_arg.head[0].iov_len % 4) {
3979 /* client is nuts */
3980 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3981 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3982 return 0;
3983 }
1da177e4
LT		 3984 args->p = p;
3985 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3986 args->pagelist = rqstp->rq_arg.pages;
3987 args->pagelen = rqstp->rq_arg.page_len;
3988 args->tmpp = NULL;
3989 args->to_free = NULL;
3990 args->ops = args->iops;
3991 args->rqstp = rqstp;
3992
3e98abff 3993 return !nfsd4_decode_compound(args);
1da177e4
LT		 3994}
3995
3996int
2ebbc012 3997nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3998{
3999 /*
4000 * All that remains is to write the tag and operation count...
4001 */
557ce264 4002 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4003 struct xdr_buf *buf = resp->xdr.buf;
4004
4005 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4006 buf->tail[0].iov_len);
dd97fdde 4007
2825a7f9
BF		 4008 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4009
1da177e4
LT		 4010 p = resp->tagp;
4011 *p++ = htonl(resp->taglen);
4012 memcpy(p, resp->tag, resp->taglen);
4013 p += XDR_QUADLEN(resp->taglen);
4014 *p++ = htonl(resp->opcnt);
4015
26c0c75e 4016 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4017 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4018 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4019 if (cs->status != nfserr_replay_cache) {
4020 nfsd4_store_cache_entry(resp);
73e79482 4021 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4022 }
d7682988 4023 /* Renew the clientid on success and on replay */
f0f51f5c 4024 spin_lock(&nn->client_lock);
221a6876 4025 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4026 spin_unlock(&nn->client_lock);
4027 put_client_renew(clp);
da3846a2 4028 }
1da177e4
LT		 4029 return 1;
4030}
4031
4032/*
4033 * Local variables:
4034 * c-basic-offset: 8
4035 * End:
4036 */
Ubuntu Artful kernel mirror