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nfsd4: use xdr_truncate_encode
[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
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
1da177e4
LT		 106#define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109} while (0)
110#define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
817cb9d4
CL		 114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
1da177e4
LT		 116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119} while (0)
120#define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124
125/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126#define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
1da177e4
LT		 133 goto xdr_error; \
134 } \
135} while (0)
136
590b7431
BF		 137static void next_decode_page(struct nfsd4_compoundargs *argp)
138{
590b7431 139 argp->p = page_address(argp->pagelist[0]);
365da4ad 140 argp->pagelist++;
590b7431
BF		 141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148}
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4 176 memcpy(p, argp->p, avail);
590b7431 177 next_decode_page(argp);
1da177e4
LT		 178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181}
182
60adfc50
AA		 183static int zero_clientid(clientid_t *clid)
184{
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186}
187
2d8498db
CH		 188/**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2d8498db
CH		 213/**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
2ebbc012 223static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 224{
1da177e4 225 if (p == argp->tmp) {
67114fe6 226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 227 if (!p)
228 return NULL;
1da177e4 229 } else {
73dff8be 230 BUG_ON(p != argp->tmpp);
1da177e4
LT		 231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
a4db5fe5 234 kfree(p);
1da177e4
LT		 235 return NULL;
236 } else
237 return (char *)p;
238}
239
b37ad28b 240static __be32
1da177e4
LT		 241nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242{
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
7e705706 248 bmval[2] = 0;
1da177e4
LT		 249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
7e705706
AA		 260 if (bmlen > 2)
261 READ32(bmval[2]);
1da177e4
LT		 262
263 DECODE_TAIL;
264}
265
b37ad28b 266static __be32
3c8e0316 267nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
1da177e4
LT		 270{
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
1da177e4
LT		 280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 290 u32 nace;
28e05dd8 291 struct nfs4_ace *ace;
1da177e4
LT		 292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
28e05dd8 296 if (nace > NFS4_ACL_MAX)
798df338 297 return nfserr_fbig;
28e05dd8
BF		 298
299 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 300 if (*acl == NULL)
301 return nfserr_jukebox;
302
28e05dd8 303 defer_free(argp, kfree, *acl);
1da177e4 304
28e05dd8
BF		 305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 307 READ_BUF(16); len += 16;
28e05dd8
BF		 308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
1da177e4
LT		 311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
28e05dd8 315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 316 status = nfs_ok;
28e05dd8 317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 318 ;
28e05dd8 319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 320 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 321 buf, dummy32, &ace->who_gid);
1da177e4 322 else
3c726023 323 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_uid);
3c726023
BF		 325 if (status)
326 return status;
1da177e4
LT		 327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
47c85291
N		 344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
1da177e4
LT		 346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
47c85291
N		 355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
1da177e4
LT		 357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
bf8d9097 369 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
1da177e4
LT		 382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
bf8d9097 392 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
18032ca0
DQ		 405
406 label->len = 0;
407#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
3378b7f4 426 label->len = dummy32;
18032ca0
DQ		 427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430#endif
431
3c8e0316
YZ		 432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
1da177e4
LT		 437 goto xdr_error;
438
439 DECODE_TAIL;
1da177e4
LT		 440}
441
e31a1b66
BH		 442static __be32
443nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444{
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463}
464
acb2887e
BF		 465static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466{
467 DECODE_HEAD;
12fc3e92 468 u32 dummy, uid, gid;
acb2887e
BF		 469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
57569a70
BF		 476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
acb2887e
BF		 481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
12fc3e92
BF		 487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
12fc3e92
BF		 502 READ32(uid);
503 READ32(gid);
acb2887e
BF		 504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
12fc3e92 509 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
12fc3e92 520 }
acb2887e
BF		 521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543}
544
cb73a9f4
BF		 545static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546{
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554}
555
1d1bc8f2
BF		 556static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557{
558 DECODE_HEAD;
1d1bc8f2
BF		 559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
6ce2357f
BS		 563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
1d1bc8f2
BF		 565 DECODE_TAIL;
566}
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570{
571 DECODE_HEAD;
572
e31a1b66 573 READ_BUF(4);
1da177e4 574 READ32(close->cl_seqid);
e31a1b66 575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 576
577 DECODE_TAIL;
578}
579
580
b37ad28b 581static __be32
1da177e4
LT		 582nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583{
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591}
592
b37ad28b 593static __be32
1da177e4
LT		 594nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595{
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 625 return status;
626
3c8e0316 627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 628 &create->cr_acl, &create->cr_label);
c0d6fc8a 629 if (status)
1da177e4
LT		 630 goto out;
631
632 DECODE_TAIL;
633}
634
b37ad28b 635static inline __be32
1da177e4
LT		 636nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637{
e31a1b66 638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 639}
640
b37ad28b 641static inline __be32
1da177e4
LT		 642nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643{
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 656 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 657 return status;
658
659 DECODE_TAIL;
660}
661
b37ad28b 662static __be32
1da177e4
LT		 663nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664{
665 DECODE_HEAD;
666
1da177e4
LT		 667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
e31a1b66 680 READ_BUF(4);
1da177e4 681 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
e31a1b66
BH		 692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
1da177e4
LT		 696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700}
701
b37ad28b 702static __be32
1da177e4
LT		 703nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704{
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723{
724 DECODE_HEAD;
725
e31a1b66 726 READ_BUF(8);
1da177e4
LT		 727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
1da177e4
LT		 735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743{
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 751 return status;
752
753 DECODE_TAIL;
754}
755
2c8bd7e0 756static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 757{
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
2c8bd7e0
BH		 763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
04f9e664
BF		 768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
fc0d14fe 776 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
92bac8c5 792 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 793 if (!w)
794 return nfs_ok;
2c8bd7e0
BH		 795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
04f9e664
BF		 798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 803 return nfs_ok;
804 }
805xdr_error:
806 return nfserr_bad_xdr;
807}
808
809static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810{
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 816 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 817 return nfserr_bad_xdr;
818 return nfs_ok;
819xdr_error:
820 return nfserr_bad_xdr;
821}
822
a084daf5
BF		 823static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824{
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836xdr_error:
837 return nfserr_bad_xdr;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842{
843 DECODE_HEAD;
2c8bd7e0 844 u32 dummy;
1da177e4
LT		 845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
fe0750e5 848 open->op_openowner = NULL;
1da177e4 849
9d313b17 850 open->op_xdr_error = 0;
1da177e4 851 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 852 READ_BUF(4);
1da177e4 853 READ32(open->op_seqid);
2c8bd7e0
BH		 854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
04f9e664
BF		 857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
a084daf5 862 READ_BUF(sizeof(clientid_t));
1da177e4 863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
1da177e4
LT		 868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
c0d6fc8a 878 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 879 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 880 if (status)
1da177e4
LT		 881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 886 break;
79fb54ab
BH		 887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
ab4684d1
CL		 890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 892 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 893 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 894 if (status)
895 goto out;
896 break;
1da177e4
LT		 897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
1da177e4
LT		 927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 931 return status;
932 break;
8b289b2c
BF		 933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
1da177e4
LT		 946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951}
952
b37ad28b 953static __be32
1da177e4
LT		 954nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955{
956 DECODE_HEAD;
e1a90ebd
AS		 957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
e31a1b66
BH		 961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
1da177e4 965 READ32(open_conf->oc_seqid);
e1a90ebd 966
1da177e4
LT		 967 DECODE_TAIL;
968}
969
b37ad28b 970static __be32
1da177e4
LT		 971nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972{
973 DECODE_HEAD;
974
e31a1b66
BH		 975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
04f9e664 978 READ_BUF(4);
1da177e4 979 READ32(open_down->od_seqid);
2c8bd7e0
BH		 980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
04f9e664
BF		 982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
1da177e4
LT		 987 DECODE_TAIL;
988}
989
b37ad28b 990static __be32
1da177e4
LT		 991nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992{
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003}
1004
e1a90ebd
AS		 1005static __be32
1006nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007{
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011}
1012
b37ad28b 1013static __be32
1da177e4
LT		 1014nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015{
1016 DECODE_HEAD;
1017
e31a1b66
BH		 1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1da177e4
LT		 1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1036 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042}
1043
b37ad28b 1044static __be32
1da177e4
LT		 1045nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046{
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1054 return status;
1055
1056 DECODE_TAIL;
1057}
1058
b37ad28b 1059static __be32
1da177e4
LT		 1060nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061{
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1072 return status;
a36b1725 1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1074 return status;
1075
1076 DECODE_TAIL;
1077}
1078
b37ad28b 1079static __be32
1da177e4
LT		 1080nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081{
1082 DECODE_HEAD;
1083
e1a90ebd
AS		 1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1da177e4
LT		 1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091}
1092
dcb488a3
AA		 1093static __be32
1094nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096{
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107}
1108
04f4ad16
BF		 1109static __be32
1110nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112{
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118}
1119
b37ad28b 1120static __be32
1da177e4
LT		 1121nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122{
e31a1b66 1123 __be32 status;
1da177e4 1124
e31a1b66
BH		 1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
3c8e0316 1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1129 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1130}
1131
b37ad28b 1132static __be32
1da177e4
LT		 1133nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134{
1135 DECODE_HEAD;
1136
e1a90ebd
AS		 1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
ab4684d1
CL		 1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1142
a084daf5
BF		 1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1da177e4
LT		 1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159}
1160
b37ad28b 1161static __be32
1da177e4
LT		 1162nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163{
1164 DECODE_HEAD;
1165
e1a90ebd
AS		 1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
ab4684d1 1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1170 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1172
1173 DECODE_TAIL;
1174}
1175
1176/* Also used for NVERIFY */
b37ad28b 1177static __be32
1da177e4
LT		 1178nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179{
1da177e4
LT		 1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1186 * nfsd4_proc_verify */
1187
1da177e4
LT		 1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194}
1195
b37ad28b 1196static __be32
1da177e4
LT		 1197nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198{
1199 int avail;
1da177e4
LT		 1200 int len;
1201 DECODE_HEAD;
1202
e31a1b66
BH		 1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1da177e4
LT		 1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1da177e4
LT		 1221 goto xdr_error;
1222 }
70cc7f75
BF		 1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
70cc7f75 1225 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1226
1227 len = XDR_QUADLEN(write->wr_buflen) << 2;
1228 if (len >= avail) {
1229 int pages;
1230
1231 len -= avail;
1232
1233 pages = len >> PAGE_SHIFT;
1234 argp->pagelist += pages;
1235 argp->pagelen -= pages * PAGE_SIZE;
1236 len -= pages * PAGE_SIZE;
1237
1238 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1239 argp->pagelist++;
5a80a54d 1240 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1241 }
5a80a54d 1242 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1243
1244 DECODE_TAIL;
1245}
1246
b37ad28b 1247static __be32
1da177e4
LT		 1248nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1249{
1250 DECODE_HEAD;
1251
e1a90ebd
AS		 1252 if (argp->minorversion >= 1)
1253 return nfserr_notsupp;
1254
1da177e4
LT		 1255 READ_BUF(12);
1256 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1257 READ32(rlockowner->rl_owner.len);
1258 READ_BUF(rlockowner->rl_owner.len);
1259 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1260
60adfc50
AA		 1261 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1262 return nfserr_inval;
1da177e4
LT		 1263 DECODE_TAIL;
1264}
1265
2db134eb
AA		 1266static __be32
1267nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1268 struct nfsd4_exchange_id *exid)
2db134eb 1269{
5afa040b 1270 int dummy, tmp;
0733d213
AA		 1271 DECODE_HEAD;
1272
1273 READ_BUF(NFS4_VERIFIER_SIZE);
1274 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1275
a084daf5
BF		 1276 status = nfsd4_decode_opaque(argp, &exid->clname);
1277 if (status)
1278 return nfserr_bad_xdr;
0733d213
AA		 1279
1280 READ_BUF(4);
1281 READ32(exid->flags);
1282
1283 /* Ignore state_protect4_a */
1284 READ_BUF(4);
1285 READ32(exid->spa_how);
1286 switch (exid->spa_how) {
1287 case SP4_NONE:
1288 break;
1289 case SP4_MACH_CRED:
1290 /* spo_must_enforce */
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy * 4);
1294 p += dummy;
1295
1296 /* spo_must_allow */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy * 4);
1300 p += dummy;
1301 break;
1302 case SP4_SSV:
1303 /* ssp_ops */
1304 READ_BUF(4);
1305 READ32(dummy);
1306 READ_BUF(dummy * 4);
1307 p += dummy;
1308
1309 READ_BUF(4);
1310 READ32(dummy);
1311 READ_BUF(dummy * 4);
1312 p += dummy;
1313
1314 /* ssp_hash_algs<> */
1315 READ_BUF(4);
5afa040b
MJ		 1316 READ32(tmp);
1317 while (tmp--) {
1318 READ_BUF(4);
1319 READ32(dummy);
1320 READ_BUF(dummy);
1321 p += XDR_QUADLEN(dummy);
1322 }
0733d213
AA		 1323
1324 /* ssp_encr_algs<> */
1325 READ_BUF(4);
5afa040b
MJ		 1326 READ32(tmp);
1327 while (tmp--) {
1328 READ_BUF(4);
1329 READ32(dummy);
1330 READ_BUF(dummy);
1331 p += XDR_QUADLEN(dummy);
1332 }
0733d213
AA		 1333
1334 /* ssp_window and ssp_num_gss_handles */
1335 READ_BUF(8);
1336 READ32(dummy);
1337 READ32(dummy);
1338 break;
1339 default:
1340 goto xdr_error;
1341 }
1342
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1345 READ32(dummy);
1346
1347 if (dummy > 1)
1348 goto xdr_error;
1349
1350 if (dummy == 1) {
1351 /* nii_domain */
1352 READ_BUF(4);
1353 READ32(dummy);
1354 READ_BUF(dummy);
1355 p += XDR_QUADLEN(dummy);
1356
1357 /* nii_name */
1358 READ_BUF(4);
1359 READ32(dummy);
1360 READ_BUF(dummy);
1361 p += XDR_QUADLEN(dummy);
1362
1363 /* nii_date */
1364 READ_BUF(12);
1365 p += 3;
1366 }
1367 DECODE_TAIL;
2db134eb
AA		 1368}
1369
1370static __be32
1371nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1372 struct nfsd4_create_session *sess)
1373{
ec6b5d7b 1374 DECODE_HEAD;
ec6b5d7b 1375 u32 dummy;
ec6b5d7b
AA		 1376
1377 READ_BUF(16);
1378 COPYMEM(&sess->clientid, 8);
1379 READ32(sess->seqid);
1380 READ32(sess->flags);
1381
1382 /* Fore channel attrs */
1383 READ_BUF(28);
1384 READ32(dummy); /* headerpadsz is always 0 */
1385 READ32(sess->fore_channel.maxreq_sz);
1386 READ32(sess->fore_channel.maxresp_sz);
1387 READ32(sess->fore_channel.maxresp_cached);
1388 READ32(sess->fore_channel.maxops);
1389 READ32(sess->fore_channel.maxreqs);
1390 READ32(sess->fore_channel.nr_rdma_attrs);
1391 if (sess->fore_channel.nr_rdma_attrs == 1) {
1392 READ_BUF(4);
1393 READ32(sess->fore_channel.rdma_attrs);
1394 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1396 goto xdr_error;
1397 }
1398
1399 /* Back channel attrs */
1400 READ_BUF(28);
1401 READ32(dummy); /* headerpadsz is always 0 */
1402 READ32(sess->back_channel.maxreq_sz);
1403 READ32(sess->back_channel.maxresp_sz);
1404 READ32(sess->back_channel.maxresp_cached);
1405 READ32(sess->back_channel.maxops);
1406 READ32(sess->back_channel.maxreqs);
1407 READ32(sess->back_channel.nr_rdma_attrs);
1408 if (sess->back_channel.nr_rdma_attrs == 1) {
1409 READ_BUF(4);
1410 READ32(sess->back_channel.rdma_attrs);
1411 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1413 goto xdr_error;
1414 }
1415
acb2887e 1416 READ_BUF(4);
ec6b5d7b 1417 READ32(sess->callback_prog);
acb2887e 1418 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1419 DECODE_TAIL;
2db134eb
AA		 1420}
1421
1422static __be32
1423nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1424 struct nfsd4_destroy_session *destroy_session)
1425{
e10e0cfc
BH		 1426 DECODE_HEAD;
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1428 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1429
1430 DECODE_TAIL;
2db134eb
AA		 1431}
1432
e1ca12df
BS		 1433static __be32
1434nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_free_stateid *free_stateid)
1436{
1437 DECODE_HEAD;
1438
1439 READ_BUF(sizeof(stateid_t));
1440 READ32(free_stateid->fr_stateid.si_generation);
1441 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1442
1443 DECODE_TAIL;
1444}
1445
2db134eb
AA		 1446static __be32
1447nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1448 struct nfsd4_sequence *seq)
1449{
b85d4c01
BH		 1450 DECODE_HEAD;
1451
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1453 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1454 READ32(seq->seqid);
1455 READ32(seq->slotid);
1456 READ32(seq->maxslots);
1457 READ32(seq->cachethis);
1458
1459 DECODE_TAIL;
2db134eb
AA		 1460}
1461
17456804
BS		 1462static __be32
1463nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1464{
17456804 1465 int i;
03cfb420
BS		 1466 __be32 *p, status;
1467 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1468
1469 READ_BUF(4);
1470 test_stateid->ts_num_ids = ntohl(*p++);
1471
03cfb420 1472 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1473
1474 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1475 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1476 if (!stateid) {
afcf6792 1477 status = nfserrno(-ENOMEM);
03cfb420
BS		 1478 goto out;
1479 }
1480
1481 defer_free(argp, kfree, stateid);
1482 INIT_LIST_HEAD(&stateid->ts_id_list);
1483 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1484
1485 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1486 if (status)
03cfb420 1487 goto out;
17456804
BS		 1488 }
1489
1490 status = 0;
1491out:
1492 return status;
1493xdr_error:
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1495 status = nfserr_bad_xdr;
1496 goto out;
1497}
1498
345c2842
MJ		 1499static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1500{
1501 DECODE_HEAD;
1502
1503 READ_BUF(8);
1504 COPYMEM(&dc->clientid, 8);
1505
1506 DECODE_TAIL;
1507}
1508
4dc6ec00
BF		 1509static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1510{
1511 DECODE_HEAD;
1512
1513 READ_BUF(4);
1514 READ32(rc->rca_one_fs);
1515
1516 DECODE_TAIL;
1517}
1518
347e0ad9
BH		 1519static __be32
1520nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1521{
1522 return nfs_ok;
1523}
1524
3c375c6f
BH		 1525static __be32
1526nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1527{
1e685ec2 1528 return nfserr_notsupp;
3c375c6f
BH		 1529}
1530
347e0ad9
BH		 1531typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1532
1533static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1534 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1535 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1536 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1537 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1538 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1540 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1541 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1543 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1544 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1545 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1546 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1547 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1549 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1550 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1552 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1553 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1554 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1555 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1557 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1558 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1560 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1561 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1562 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1565 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1566 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1567 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1568 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1569 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1570 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1571
1572 /* new operations for NFSv4.1 */
cb73a9f4 1573 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1574 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1575 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1576 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1577 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1578 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1579 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1585 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1586 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1587 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1588 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1589 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1590 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1591 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1592};
1593
e1a90ebd
AS		 1594static inline bool
1595nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1596{
8217d146 1597 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1598 return false;
8217d146 1599 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1600 return false;
8217d146
AS		 1601 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1602 return false;
1603 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1604 return false;
1605 return true;
1606}
f2feb96b 1607
6ff40dec
BF		 1608/*
1609 * Return a rough estimate of the maximum possible reply size. Note the
1610 * estimate includes rpc headers so is meant to be passed to
1611 * svc_reserve, not svc_reserve_auth.
1612 *
1613 * Also note the current compound encoding permits only one operation to
1614 * use pages beyond the first one, so the maximum possible length is the
1615 * maximum over these values, not the sum.
1616 */
1617static int nfsd4_max_reply(u32 opnum)
1618{
1619 switch (opnum) {
1620 case OP_READLINK:
1621 case OP_READDIR:
1622 /*
1623 * Both of these ops take a single page for data and put
1624 * the head and tail in another page:
1625 */
1626 return 2 * PAGE_SIZE;
1627 case OP_READ:
1628 return INT_MAX;
1629 default:
1630 return PAGE_SIZE;
1631 }
1632}
1633
b37ad28b 1634static __be32
1da177e4
LT		 1635nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1636{
1637 DECODE_HEAD;
1638 struct nfsd4_op *op;
1091006c 1639 bool cachethis = false;
6ff40dec 1640 int max_reply = PAGE_SIZE;
1da177e4
LT		 1641 int i;
1642
1da177e4
LT		 1643 READ_BUF(4);
1644 READ32(argp->taglen);
1645 READ_BUF(argp->taglen + 8);
1646 SAVEMEM(argp->tag, argp->taglen);
1647 READ32(argp->minorversion);
1648 READ32(argp->opcnt);
1649
1650 if (argp->taglen > NFSD4_MAX_TAGLEN)
1651 goto xdr_error;
1652 if (argp->opcnt > 100)
1653 goto xdr_error;
1654
e8c96f8c 1655 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1656 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1657 if (!argp->ops) {
1658 argp->ops = argp->iops;
817cb9d4 1659 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1660 goto xdr_error;
1661 }
1662 }
1663
e1a90ebd 1664 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1665 argp->opcnt = 0;
1666
1da177e4
LT		 1667 for (i = 0; i < argp->opcnt; i++) {
1668 op = &argp->ops[i];
1669 op->replay = NULL;
1670
8a61b18c
BF		 1671 READ_BUF(4);
1672 READ32(op->opnum);
1da177e4 1673
e1a90ebd
AS		 1674 if (nfsd4_opnum_in_range(argp, op))
1675 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1676 else {
1da177e4
LT		 1677 op->opnum = OP_ILLEGAL;
1678 op->status = nfserr_op_illegal;
1da177e4 1679 }
1091006c
BF		 1680 /*
1681 * We'll try to cache the result in the DRC if any one
1682 * op in the compound wants to be cached:
1683 */
1684 cachethis |= nfsd4_cache_this_op(op);
6ff40dec
BF		 1685
1686 max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
e372ba60
BF		 1687
1688 if (op->status) {
1689 argp->opcnt = i+1;
1690 break;
1691 }
1da177e4 1692 }
1091006c
BF		 1693 /* Sessions make the DRC unnecessary: */
1694 if (argp->minorversion)
1695 cachethis = false;
6ff40dec
BF		 1696 if (max_reply != INT_MAX)
1697 svc_reserve(argp->rqstp, max_reply);
1091006c 1698 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1699
1700 DECODE_TAIL;
1701}
1da177e4 1702
1da177e4
LT		 1703#define WRITE32(n) *p++ = htonl(n)
1704#define WRITE64(n) do { \
1705 *p++ = htonl((u32)((n) >> 32)); \
1706 *p++ = htonl((u32)(n)); \
1707} while (0)
5108b276 1708#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1709 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1710 memcpy(p, ptr, nbytes); \
1711 p += XDR_QUADLEN(nbytes); \
5108b276 1712}} while (0)
c654b8a9
BF		 1713
1714static void write32(__be32 **p, u32 n)
1715{
45eaa1c1 1716 *(*p)++ = htonl(n);
c654b8a9
BF		 1717}
1718
1719static void write64(__be32 **p, u64 n)
1720{
45eaa1c1 1721 write32(p, (n >> 32));
c654b8a9
BF		 1722 write32(p, (u32)n);
1723}
1724
1725static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1726{
1727 if (IS_I_VERSION(inode)) {
1728 write64(p, inode->i_version);
1729 } else {
1730 write32(p, stat->ctime.tv_sec);
1731 write32(p, stat->ctime.tv_nsec);
1732 }
1733}
1734
1735static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1736{
1737 write32(p, c->atomic);
1738 if (c->change_supported) {
1739 write64(p, c->before_change);
1740 write64(p, c->after_change);
1741 } else {
1742 write32(p, c->before_ctime_sec);
1743 write32(p, c->before_ctime_nsec);
1744 write32(p, c->after_ctime_sec);
1745 write32(p, c->after_ctime_nsec);
1746 }
1747}
1da177e4
LT		 1748
1749#define RESERVE_SPACE(nbytes) do { \
d3f627c8
BF		 1750 p = xdr_reserve_space(&resp->xdr, nbytes); \
1751 BUG_ON(!p); \
1da177e4 1752} while (0)
1da177e4 1753
81c3f413 1754/* Encode as an array of strings the string given with components
e7a0444a 1755 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1756 */
ddd1ea56
BF		 1757static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1758 char *components, char esc_enter,
1759 char esc_exit)
81c3f413 1760{
ddd1ea56
BF		 1761 __be32 *p;
1762 __be32 *countp;
81c3f413 1763 int strlen, count=0;
e7a0444a 1764 char *str, *end, *next;
81c3f413
BF		 1765
1766 dprintk("nfsd4_encode_components(%s)\n", components);
ddd1ea56
BF		 1767 p = xdr_reserve_space(xdr, 4);
1768 if (!p)
81c3f413 1769 return nfserr_resource;
ddd1ea56 1770 countp = p;
81c3f413
BF		 1771 WRITE32(0); /* We will fill this in with @count later */
1772 end = str = components;
1773 while (*end) {
e7a0444a
WAA		 1774 bool found_esc = false;
1775
1776 /* try to parse as esc_start, ..., esc_end, sep */
1777 if (*str == esc_enter) {
1778 for (; *end && (*end != esc_exit); end++)
1779 /* find esc_exit or end of string */;
1780 next = end + 1;
1781 if (*end && (!*next || *next == sep)) {
1782 str++;
1783 found_esc = true;
1784 }
1785 }
1786
1787 if (!found_esc)
1788 for (; *end && (*end != sep); end++)
1789 /* find sep or end of string */;
1790
81c3f413
BF		 1791 strlen = end - str;
1792 if (strlen) {
ddd1ea56
BF		 1793 p = xdr_reserve_space(xdr, strlen + 4);
1794 if (!p)
81c3f413
BF		 1795 return nfserr_resource;
1796 WRITE32(strlen);
1797 WRITEMEM(str, strlen);
1798 count++;
1799 }
1800 else
1801 end++;
1802 str = end;
1803 }
81c3f413
BF		 1804 p = countp;
1805 WRITE32(count);
1806 return 0;
1807}
1808
e7a0444a
WAA		 1809/* Encode as an array of strings the string given with components
1810 * separated @sep.
1811 */
ddd1ea56
BF		 1812static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1813 char *components)
e7a0444a 1814{
ddd1ea56 1815 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1816}
1817
81c3f413
BF		 1818/*
1819 * encode a location element of a fs_locations structure
1820 */
ddd1ea56
BF		 1821static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1822 struct nfsd4_fs_location *location)
81c3f413 1823{
b37ad28b 1824 __be32 status;
81c3f413 1825
ddd1ea56 1826 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1827 '[', ']');
81c3f413
BF		 1828 if (status)
1829 return status;
ddd1ea56 1830 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1831 if (status)
1832 return status;
81c3f413
BF		 1833 return 0;
1834}
1835
1836/*
ed748aac 1837 * Encode a path in RFC3530 'pathname4' format
81c3f413 1838 */
ddd1ea56
BF		 1839static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1840 const struct path *root,
1841 const struct path *path)
81c3f413 1842{
301f0268 1843 struct path cur = *path;
ddd1ea56 1844 __be32 *p;
ed748aac
TM		 1845 struct dentry **components = NULL;
1846 unsigned int ncomponents = 0;
1847 __be32 err = nfserr_jukebox;
81c3f413 1848
ed748aac 1849 dprintk("nfsd4_encode_components(");
81c3f413 1850
ed748aac
TM		 1851 path_get(&cur);
1852 /* First walk the path up to the nfsd root, and store the
1853 * dentries/path components in an array.
1854 */
1855 for (;;) {
1856 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1857 break;
1858 if (cur.dentry == cur.mnt->mnt_root) {
1859 if (follow_up(&cur))
1860 continue;
1861 goto out_free;
1862 }
1863 if ((ncomponents & 15) == 0) {
1864 struct dentry **new;
1865 new = krealloc(components,
1866 sizeof(*new) * (ncomponents + 16),
1867 GFP_KERNEL);
1868 if (!new)
1869 goto out_free;
1870 components = new;
1871 }
1872 components[ncomponents++] = cur.dentry;
1873 cur.dentry = dget_parent(cur.dentry);
1874 }
ddd1ea56
BF		 1875 err = nfserr_resource;
1876 p = xdr_reserve_space(xdr, 4);
1877 if (!p)
ed748aac
TM		 1878 goto out_free;
1879 WRITE32(ncomponents);
1880
1881 while (ncomponents) {
1882 struct dentry *dentry = components[ncomponents - 1];
301f0268 1883 unsigned int len;
ed748aac 1884
301f0268
AV		 1885 spin_lock(&dentry->d_lock);
1886 len = dentry->d_name.len;
ddd1ea56
BF		 1887 p = xdr_reserve_space(xdr, len + 4);
1888 if (!p) {
301f0268 1889 spin_unlock(&dentry->d_lock);
ed748aac 1890 goto out_free;
301f0268 1891 }
ed748aac
TM		 1892 WRITE32(len);
1893 WRITEMEM(dentry->d_name.name, len);
1894 dprintk("/%s", dentry->d_name.name);
301f0268 1895 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1896 dput(dentry);
1897 ncomponents--;
81c3f413 1898 }
ed748aac 1899
ed748aac
TM		 1900 err = 0;
1901out_free:
1902 dprintk(")\n");
1903 while (ncomponents)
1904 dput(components[--ncomponents]);
1905 kfree(components);
1906 path_put(&cur);
1907 return err;
1908}
1909
ddd1ea56
BF		 1910static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1911 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1912{
1913 struct svc_export *exp_ps;
1914 __be32 res;
1915
1916 exp_ps = rqst_find_fsidzero_export(rqstp);
1917 if (IS_ERR(exp_ps))
1918 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1919 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1920 exp_put(exp_ps);
1921 return res;
81c3f413
BF		 1922}
1923
1924/*
1925 * encode a fs_locations structure
1926 */
ddd1ea56
BF		 1927static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1928 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1929{
b37ad28b 1930 __be32 status;
cc45f017 1931 int i;
ddd1ea56 1932 __be32 *p;
81c3f413 1933 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1934
ddd1ea56 1935 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1936 if (status)
1937 return status;
ddd1ea56
BF		 1938 p = xdr_reserve_space(xdr, 4);
1939 if (!p)
81c3f413
BF		 1940 return nfserr_resource;
1941 WRITE32(fslocs->locations_count);
1942 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1943 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1944 if (status)
1945 return status;
1946 }
81c3f413
BF		 1947 return 0;
1948}
1da177e4 1949
3d2544b1
BF		 1950static u32 nfs4_file_type(umode_t mode)
1951{
1952 switch (mode & S_IFMT) {
1953 case S_IFIFO: return NF4FIFO;
1954 case S_IFCHR: return NF4CHR;
1955 case S_IFDIR: return NF4DIR;
1956 case S_IFBLK: return NF4BLK;
1957 case S_IFLNK: return NF4LNK;
1958 case S_IFREG: return NF4REG;
1959 case S_IFSOCK: return NF4SOCK;
1960 default: return NF4BAD;
1961 };
1962}
1da177e4 1963
b37ad28b 1964static inline __be32
ddd1ea56
BF		 1965nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1966 struct nfs4_ace *ace)
1da177e4 1967{
3554116d 1968 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1969 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1970 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1971 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1972 else
ddd1ea56 1973 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1974}
1975
42ca0993
BF		 1976#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1977 FATTR4_WORD0_RDATTR_ERROR)
1978#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1979
18032ca0
DQ		 1980#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1981static inline __be32
ddd1ea56
BF		 1982nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1983 void *context, int len)
18032ca0 1984{
ddd1ea56 1985 __be32 *p;
18032ca0 1986
ddd1ea56
BF		 1987 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1988 if (!p)
18032ca0
DQ		 1989 return nfserr_resource;
1990
1991 /*
1992 * For now we use a 0 here to indicate the null translation; in
1993 * the future we may place a call to translation code here.
1994 */
18032ca0
DQ		 1995 WRITE32(0); /* lfs */
1996 WRITE32(0); /* pi */
1997 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1998 return 0;
1999}
2000#else
2001static inline __be32
ddd1ea56
BF		 2002nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2003 void *context, int len)
18032ca0
DQ		 2004{ return 0; }
2005#endif
2006
b37ad28b 2007static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2008{
2009 /* As per referral draft: */
2010 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2011 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2012 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2013 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2014 *rdattr_err = NFSERR_MOVED;
2015 else
2016 return nfserr_moved;
2017 }
2018 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2019 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2020 return 0;
2021}
1da177e4 2022
ae7095a7
BF		 2023
2024static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2025{
2026 struct path path = exp->ex_path;
2027 int err;
2028
2029 path_get(&path);
2030 while (follow_up(&path)) {
2031 if (path.dentry != path.mnt->mnt_root)
2032 break;
2033 }
3dadecce 2034 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2035 path_put(&path);
2036 return err;
2037}
2038
1da177e4
LT		 2039/*
2040 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2041 * ourselves.
1da177e4 2042 */
b37ad28b 2043__be32
d5184658
BF		 2044nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2045 struct svc_export *exp,
2046 struct dentry *dentry, u32 *bmval,
406a7ea9 2047 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2048{
2049 u32 bmval0 = bmval[0];
2050 u32 bmval1 = bmval[1];
7e705706 2051 u32 bmval2 = bmval[2];
1da177e4 2052 struct kstat stat;
d50e6136 2053 struct svc_fh *tempfh = NULL;
1da177e4 2054 struct kstatfs statfs;
ddd1ea56 2055 __be32 *p;
1fcea5b2 2056 int starting_len = xdr->buf->len;
2ebbc012 2057 __be32 *attrlenp;
1da177e4
LT		 2058 u32 dummy;
2059 u64 dummy64;
42ca0993 2060 u32 rdattr_err = 0;
b37ad28b 2061 __be32 status;
b8dd7b9a 2062 int err;
1da177e4
LT		 2063 int aclsupport = 0;
2064 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2065 void *context = NULL;
2066 int contextlen;
2067 bool contextsupport = false;
7e705706
AA		 2068 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2069 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2070 struct path path = {
2071 .mnt = exp->ex_path.mnt,
2072 .dentry = dentry,
2073 };
3d733711 2074 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2075
2076 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2077 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2078 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2079 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2080
42ca0993 2081 if (exp->ex_fslocs.migrated) {
7e705706 2082 BUG_ON(bmval[2]);
42ca0993
BF		 2083 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2084 if (status)
2085 goto out;
2086 }
2087
3dadecce 2088 err = vfs_getattr(&path, &stat);
b8dd7b9a 2089 if (err)
1da177e4 2090 goto out_nfserr;
a16e92ed
BF		 2091 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2092 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2093 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2094 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2095 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2096 if (err)
1da177e4
LT		 2097 goto out_nfserr;
2098 }
2099 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2100 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2101 status = nfserr_jukebox;
2102 if (!tempfh)
2103 goto out;
2104 fh_init(tempfh, NFS4_FHSIZE);
2105 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2106 if (status)
2107 goto out;
d50e6136 2108 fhp = tempfh;
1da177e4
LT		 2109 }
2110 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2111 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2112 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2113 aclsupport = (err == 0);
1da177e4 2114 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2115 if (err == -EOPNOTSUPP)
1da177e4 2116 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2117 else if (err == -EINVAL) {
1da177e4
LT		 2118 status = nfserr_attrnotsupp;
2119 goto out;
b8dd7b9a 2120 } else if (err != 0)
1da177e4
LT		 2121 goto out_nfserr;
2122 }
2123 }
1da177e4 2124
18032ca0
DQ		 2125#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2126 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2127 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2128 err = security_inode_getsecctx(dentry->d_inode,
2129 &context, &contextlen);
2130 contextsupport = (err == 0);
2131 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2132 if (err == -EOPNOTSUPP)
2133 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2134 else if (err)
2135 goto out_nfserr;
2136 }
2137 }
2138#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2139
2b44f1ba 2140 if (bmval2) {
ddd1ea56
BF		 2141 p = xdr_reserve_space(xdr, 16);
2142 if (!p)
2b44f1ba 2143 goto out_resource;
7e705706
AA		 2144 WRITE32(3);
2145 WRITE32(bmval0);
2146 WRITE32(bmval1);
2147 WRITE32(bmval2);
2b44f1ba 2148 } else if (bmval1) {
ddd1ea56
BF		 2149 p = xdr_reserve_space(xdr, 12);
2150 if (!p)
2b44f1ba 2151 goto out_resource;
7e705706
AA		 2152 WRITE32(2);
2153 WRITE32(bmval0);
2154 WRITE32(bmval1);
2155 } else {
ddd1ea56
BF		 2156 p = xdr_reserve_space(xdr, 8);
2157 if (!p)
2b44f1ba 2158 goto out_resource;
7e705706
AA		 2159 WRITE32(1);
2160 WRITE32(bmval0);
2161 }
ddd1ea56
BF		 2162 p = xdr_reserve_space(xdr, 4);
2163 if (!p)
2164 goto out_resource;
1da177e4
LT		 2165 attrlenp = p++; /* to be backfilled later */
2166
2167 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2168 u32 word0 = nfsd_suppattrs0(minorversion);
2169 u32 word1 = nfsd_suppattrs1(minorversion);
2170 u32 word2 = nfsd_suppattrs2(minorversion);
2171
42ca0993
BF		 2172 if (!aclsupport)
2173 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2174 if (!contextsupport)
2175 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2176 if (!word2) {
ddd1ea56
BF		 2177 p = xdr_reserve_space(xdr, 12);
2178 if (!p)
2b44f1ba 2179 goto out_resource;
7e705706
AA		 2180 WRITE32(2);
2181 WRITE32(word0);
2182 WRITE32(word1);
2183 } else {
ddd1ea56
BF		 2184 p = xdr_reserve_space(xdr, 16);
2185 if (!p)
2b44f1ba 2186 goto out_resource;
7e705706
AA		 2187 WRITE32(3);
2188 WRITE32(word0);
2189 WRITE32(word1);
2190 WRITE32(word2);
2191 }
1da177e4
LT		 2192 }
2193 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2194 p = xdr_reserve_space(xdr, 4);
2195 if (!p)
1da177e4 2196 goto out_resource;
3d2544b1 2197 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2198 if (dummy == NF4BAD) {
2199 status = nfserr_serverfault;
2200 goto out;
2201 }
1da177e4
LT		 2202 WRITE32(dummy);
2203 }
2204 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2205 p = xdr_reserve_space(xdr, 4);
2206 if (!p)
1da177e4 2207 goto out_resource;
49640001 2208 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2209 WRITE32(NFS4_FH_PERSISTENT);
49640001 2210 else
e34ac862 2211 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2212 }
2213 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2214 p = xdr_reserve_space(xdr, 8);
2215 if (!p)
1da177e4 2216 goto out_resource;
c654b8a9 2217 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2218 }
2219 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2220 p = xdr_reserve_space(xdr, 8);
2221 if (!p)
1da177e4
LT		 2222 goto out_resource;
2223 WRITE64(stat.size);
2224 }
2225 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2226 p = xdr_reserve_space(xdr, 4);
2227 if (!p)
1da177e4
LT		 2228 goto out_resource;
2229 WRITE32(1);
2230 }
2231 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2232 p = xdr_reserve_space(xdr, 4);
2233 if (!p)
1da177e4
LT		 2234 goto out_resource;
2235 WRITE32(1);
2236 }
2237 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2238 p = xdr_reserve_space(xdr, 4);
2239 if (!p)
1da177e4
LT		 2240 goto out_resource;
2241 WRITE32(0);
2242 }
2243 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2244 p = xdr_reserve_space(xdr, 16);
2245 if (!p)
1da177e4 2246 goto out_resource;
42ca0993
BF		 2247 if (exp->ex_fslocs.migrated) {
2248 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2249 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2250 } else switch(fsid_source(fhp)) {
2251 case FSIDSOURCE_FSID:
1da177e4
LT		 2252 WRITE64((u64)exp->ex_fsid);
2253 WRITE64((u64)0);
af6a4e28
N		 2254 break;
2255 case FSIDSOURCE_DEV:
1da177e4
LT		 2256 WRITE32(0);
2257 WRITE32(MAJOR(stat.dev));
2258 WRITE32(0);
2259 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2260 break;
2261 case FSIDSOURCE_UUID:
2262 WRITEMEM(exp->ex_uuid, 16);
2263 break;
1da177e4
LT		 2264 }
2265 }
2266 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2267 p = xdr_reserve_space(xdr, 4);
2268 if (!p)
1da177e4
LT		 2269 goto out_resource;
2270 WRITE32(0);
2271 }
2272 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2273 p = xdr_reserve_space(xdr, 4);
2274 if (!p)
1da177e4 2275 goto out_resource;
3d733711 2276 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2277 }
2278 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2279 p = xdr_reserve_space(xdr, 4);
2280 if (!p)
1da177e4 2281 goto out_resource;
42ca0993 2282 WRITE32(rdattr_err);
1da177e4
LT		 2283 }
2284 if (bmval0 & FATTR4_WORD0_ACL) {
2285 struct nfs4_ace *ace;
1da177e4
LT		 2286
2287 if (acl == NULL) {
ddd1ea56
BF		 2288 p = xdr_reserve_space(xdr, 4);
2289 if (!p)
1da177e4
LT		 2290 goto out_resource;
2291
2292 WRITE32(0);
2293 goto out_acl;
2294 }
ddd1ea56
BF		 2295 p = xdr_reserve_space(xdr, 4);
2296 if (!p)
1da177e4
LT		 2297 goto out_resource;
2298 WRITE32(acl->naces);
2299
28e05dd8 2300 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2301 p = xdr_reserve_space(xdr, 4*3);
2302 if (!p)
1da177e4
LT		 2303 goto out_resource;
2304 WRITE32(ace->type);
2305 WRITE32(ace->flag);
2306 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ddd1ea56 2307 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2308 if (status)
2309 goto out;
2310 }
2311 }
2312out_acl:
2313 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2314 p = xdr_reserve_space(xdr, 4);
2315 if (!p)
1da177e4
LT		 2316 goto out_resource;
2317 WRITE32(aclsupport ?
2318 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2319 }
2320 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2321 p = xdr_reserve_space(xdr, 4);
2322 if (!p)
1da177e4
LT		 2323 goto out_resource;
2324 WRITE32(1);
2325 }
2326 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2327 p = xdr_reserve_space(xdr, 4);
2328 if (!p)
1da177e4 2329 goto out_resource;
2930d381 2330 WRITE32(0);
1da177e4
LT		 2331 }
2332 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2333 p = xdr_reserve_space(xdr, 4);
2334 if (!p)
1da177e4
LT		 2335 goto out_resource;
2336 WRITE32(1);
2337 }
2338 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2339 p = xdr_reserve_space(xdr, 4);
2340 if (!p)
1da177e4
LT		 2341 goto out_resource;
2342 WRITE32(1);
2343 }
2344 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2345 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2346 if (!p)
1da177e4
LT		 2347 goto out_resource;
2348 WRITE32(fhp->fh_handle.fh_size);
2349 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2350 }
2351 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2352 p = xdr_reserve_space(xdr, 8);
2353 if (!p)
1da177e4 2354 goto out_resource;
40ee5dc6 2355 WRITE64(stat.ino);
1da177e4
LT		 2356 }
2357 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2358 p = xdr_reserve_space(xdr, 8);
2359 if (!p)
1da177e4
LT		 2360 goto out_resource;
2361 WRITE64((u64) statfs.f_ffree);
2362 }
2363 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2364 p = xdr_reserve_space(xdr, 8);
2365 if (!p)
1da177e4
LT		 2366 goto out_resource;
2367 WRITE64((u64) statfs.f_ffree);
2368 }
2369 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2370 p = xdr_reserve_space(xdr, 8);
2371 if (!p)
1da177e4
LT		 2372 goto out_resource;
2373 WRITE64((u64) statfs.f_files);
2374 }
81c3f413 2375 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2376 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2377 if (status)
2378 goto out;
2379 }
1da177e4 2380 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2381 p = xdr_reserve_space(xdr, 4);
2382 if (!p)
1da177e4
LT		 2383 goto out_resource;
2384 WRITE32(1);
2385 }
2386 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2387 p = xdr_reserve_space(xdr, 8);
2388 if (!p)
1da177e4 2389 goto out_resource;
aea240f4 2390 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2391 }
2392 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2393 p = xdr_reserve_space(xdr, 4);
2394 if (!p)
1da177e4
LT		 2395 goto out_resource;
2396 WRITE32(255);
2397 }
2398 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2399 p = xdr_reserve_space(xdr, 4);
2400 if (!p)
1da177e4 2401 goto out_resource;
a16e92ed 2402 WRITE32(statfs.f_namelen);
1da177e4
LT		 2403 }
2404 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2405 p = xdr_reserve_space(xdr, 8);
2406 if (!p)
1da177e4 2407 goto out_resource;
7adae489 2408 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2409 }
2410 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2411 p = xdr_reserve_space(xdr, 8);
2412 if (!p)
1da177e4 2413 goto out_resource;
7adae489 2414 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2415 }
2416 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2417 p = xdr_reserve_space(xdr, 4);
2418 if (!p)
1da177e4
LT		 2419 goto out_resource;
2420 WRITE32(stat.mode & S_IALLUGO);
2421 }
2422 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2423 p = xdr_reserve_space(xdr, 4);
2424 if (!p)
1da177e4
LT		 2425 goto out_resource;
2426 WRITE32(1);
2427 }
2428 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2429 p = xdr_reserve_space(xdr, 4);
2430 if (!p)
1da177e4
LT		 2431 goto out_resource;
2432 WRITE32(stat.nlink);
2433 }
2434 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2435 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2436 if (status)
2437 goto out;
2438 }
2439 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2440 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2441 if (status)
2442 goto out;
2443 }
2444 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2445 p = xdr_reserve_space(xdr, 8);
2446 if (!p)
1da177e4
LT		 2447 goto out_resource;
2448 WRITE32((u32) MAJOR(stat.rdev));
2449 WRITE32((u32) MINOR(stat.rdev));
2450 }
2451 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2452 p = xdr_reserve_space(xdr, 8);
2453 if (!p)
1da177e4
LT		 2454 goto out_resource;
2455 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2456 WRITE64(dummy64);
2457 }
2458 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2459 p = xdr_reserve_space(xdr, 8);
2460 if (!p)
1da177e4
LT		 2461 goto out_resource;
2462 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2463 WRITE64(dummy64);
2464 }
2465 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2466 p = xdr_reserve_space(xdr, 8);
2467 if (!p)
1da177e4
LT		 2468 goto out_resource;
2469 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2470 WRITE64(dummy64);
2471 }
2472 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2473 p = xdr_reserve_space(xdr, 8);
2474 if (!p)
1da177e4
LT		 2475 goto out_resource;
2476 dummy64 = (u64)stat.blocks << 9;
2477 WRITE64(dummy64);
2478 }
2479 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2480 p = xdr_reserve_space(xdr, 12);
2481 if (!p)
1da177e4 2482 goto out_resource;
bf8d9097 2483 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2484 WRITE32(stat.atime.tv_nsec);
2485 }
2486 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2487 p = xdr_reserve_space(xdr, 12);
2488 if (!p)
1da177e4
LT		 2489 goto out_resource;
2490 WRITE32(0);
2491 WRITE32(1);
2492 WRITE32(0);
2493 }
2494 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2495 p = xdr_reserve_space(xdr, 12);
2496 if (!p)
1da177e4 2497 goto out_resource;
bf8d9097 2498 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2499 WRITE32(stat.ctime.tv_nsec);
2500 }
2501 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2502 p = xdr_reserve_space(xdr, 12);
2503 if (!p)
1da177e4 2504 goto out_resource;
bf8d9097 2505 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2506 WRITE32(stat.mtime.tv_nsec);
2507 }
2508 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2509 p = xdr_reserve_space(xdr, 8);
2510 if (!p)
1da177e4 2511 goto out_resource;
406a7ea9
FF		 2512 /*
2513 * Get parent's attributes if not ignoring crossmount
2514 * and this is the root of a cross-mounted filesystem.
2515 */
2516 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2517 dentry == exp->ex_path.mnt->mnt_root)
2518 get_parent_attributes(exp, &stat);
40ee5dc6 2519 WRITE64(stat.ino);
1da177e4 2520 }
18032ca0 2521 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2522 status = nfsd4_encode_security_label(xdr, rqstp, context,
2523 contextlen);
18032ca0
DQ		 2524 if (status)
2525 goto out;
2526 }
8c18f205 2527 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2528 p = xdr_reserve_space(xdr, 16);
2529 if (!p)
de3997a7 2530 goto out_resource;
8c18f205
BH		 2531 WRITE32(3);
2532 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2533 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2534 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2535 }
7e705706 2536
ddd1ea56 2537 *attrlenp = htonl((char *)xdr->p - (char *)attrlenp - 4);
1da177e4
LT		 2538 status = nfs_ok;
2539
2540out:
ba4e55bb 2541#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2542 if (context)
2543 security_release_secctx(context, contextlen);
ba4e55bb 2544#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2545 kfree(acl);
18df11d0 2546 if (tempfh) {
d50e6136 2547 fh_put(tempfh);
18df11d0
YZ		 2548 kfree(tempfh);
2549 }
1fcea5b2
BF		 2550 if (status)
2551 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2552 return status;
2553out_nfserr:
b8dd7b9a 2554 status = nfserrno(err);
1da177e4
LT		 2555 goto out;
2556out_resource:
1da177e4
LT		 2557 status = nfserr_resource;
2558 goto out;
1da177e4
LT		 2559}
2560
d5184658
BF		 2561__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2562 struct svc_fh *fhp, struct svc_export *exp,
2563 struct dentry *dentry, u32 *bmval,
2564 struct svc_rqst *rqstp, int ignore_crossmnt)
2565{
2566 struct xdr_buf dummy = {
2567 .head[0] = {
2568 .iov_base = *p,
2569 },
2570 .buflen = words << 2,
2571 };
2572 struct xdr_stream xdr;
2573 __be32 ret;
2574
2575 xdr_init_encode(&xdr, &dummy, NULL);
2576 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2577 ignore_crossmnt);
2578 *p = xdr.p;
2579 return ret;
2580}
2581
c0ce6ec8
BF		 2582static inline int attributes_need_mount(u32 *bmval)
2583{
2584 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2585 return 1;
2586 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2587 return 1;
2588 return 0;
2589}
2590
b37ad28b 2591static __be32
1da177e4 2592nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2593 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2594{
2595 struct svc_export *exp = cd->rd_fhp->fh_export;
2596 struct dentry *dentry;
b37ad28b 2597 __be32 nfserr;
406a7ea9 2598 int ignore_crossmnt = 0;
1da177e4
LT		 2599
2600 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2601 if (IS_ERR(dentry))
2602 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2603 if (!dentry->d_inode) {
2604 /*
2605 * nfsd_buffered_readdir drops the i_mutex between
2606 * readdir and calling this callback, leaving a window
2607 * where this directory entry could have gone away.
2608 */
2609 dput(dentry);
2610 return nfserr_noent;
2611 }
1da177e4
LT		 2612
2613 exp_get(exp);
406a7ea9
FF		 2614 /*
2615 * In the case of a mountpoint, the client may be asking for
2616 * attributes that are only properties of the underlying filesystem
2617 * as opposed to the cross-mounted file system. In such a case,
2618 * we will not follow the cross mount and will fill the attribtutes
2619 * directly from the mountpoint dentry.
2620 */
3227fa41 2621 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2622 int err;
2623
3227fa41
BF		 2624 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2625 && !attributes_need_mount(cd->rd_bmval)) {
2626 ignore_crossmnt = 1;
2627 goto out_encode;
2628 }
dcb488a3
AA		 2629 /*
2630 * Why the heck aren't we just using nfsd_lookup??
2631 * Different "."/".." handling? Something else?
2632 * At least, add a comment here to explain....
2633 */
021d3a72
BF		 2634 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2635 if (err) {
2636 nfserr = nfserrno(err);
1da177e4
LT		 2637 goto out_put;
2638 }
dcb488a3
AA		 2639 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2640 if (nfserr)
2641 goto out_put;
1da177e4
LT		 2642
2643 }
3227fa41 2644out_encode:
d5184658
BF		 2645 nfserr = nfsd4_encode_fattr_to_buf(p, buflen, NULL, exp, dentry,
2646 cd->rd_bmval,
406a7ea9 2647 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2648out_put:
2649 dput(dentry);
2650 exp_put(exp);
2651 return nfserr;
2652}
2653
2ebbc012 2654static __be32 *
b37ad28b 2655nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2656{
1da177e4
LT		 2657 if (buflen < 6)
2658 return NULL;
2659 *p++ = htonl(2);
2660 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2661 *p++ = htonl(0); /* bmval1 */
2662
87915c64 2663 *p++ = htonl(4); /* attribute length */
1da177e4 2664 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2665 return p;
2666}
2667
2668static int
a0ad13ef
N		 2669nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2670 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2671{
a0ad13ef 2672 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2673 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2674 int buflen;
2ebbc012 2675 __be32 *p = cd->buffer;
b2c0cea6 2676 __be32 *cookiep;
b37ad28b 2677 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2678
2679 /* In nfsv4, "." and ".." never make it onto the wire.. */
2680 if (name && isdotent(name, namlen)) {
2681 cd->common.err = nfs_ok;
2682 return 0;
2683 }
2684
2685 if (cd->offset)
2686 xdr_encode_hyper(cd->offset, (u64) offset);
2687
2688 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2689 if (buflen < 0)
2690 goto fail;
2691
2692 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2693 cookiep = p;
1da177e4
LT		 2694 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2695 p = xdr_encode_array(p, name, namlen); /* name length & name */
2696
84822d0b 2697 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2698 switch (nfserr) {
2699 case nfs_ok:
1da177e4
LT		 2700 break;
2701 case nfserr_resource:
2702 nfserr = nfserr_toosmall;
2703 goto fail;
b2c0cea6
BF		 2704 case nfserr_noent:
2705 goto skip_entry;
1da177e4
LT		 2706 default:
2707 /*
2708 * If the client requested the RDATTR_ERROR attribute,
2709 * we stuff the error code into this attribute
2710 * and continue. If this attribute was not requested,
2711 * then in accordance with the spec, we fail the
2712 * entire READDIR operation(!)
2713 */
2714 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2715 goto fail;
1da177e4 2716 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2717 if (p == NULL) {
2718 nfserr = nfserr_toosmall;
1da177e4 2719 goto fail;
34081efc 2720 }
1da177e4
LT		 2721 }
2722 cd->buflen -= (p - cd->buffer);
2723 cd->buffer = p;
b2c0cea6
BF		 2724 cd->offset = cookiep;
2725skip_entry:
1da177e4
LT		 2726 cd->common.err = nfs_ok;
2727 return 0;
2728fail:
2729 cd->common.err = nfserr;
2730 return -EINVAL;
2731}
2732
e2f282b9
BH		 2733static void
2734nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2735{
bc749ca4 2736 __be32 *p;
e2f282b9
BH		 2737
2738 RESERVE_SPACE(sizeof(stateid_t));
2739 WRITE32(sid->si_generation);
2740 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
e2f282b9
BH		 2741}
2742
695e12f8 2743static __be32
b37ad28b 2744nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2745{
bc749ca4 2746 __be32 *p;
1da177e4
LT		 2747
2748 if (!nfserr) {
2749 RESERVE_SPACE(8);
2750 WRITE32(access->ac_supported);
2751 WRITE32(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{
2758 __be32 *p;
2759
2760 if (!nfserr) {
2761 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2762 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2763 WRITE32(bcts->dir);
6e67b5d1 2764 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2 2765 WRITE32(0);
1d1bc8f2
BF		 2766 }
2767 return nfserr;
2768}
2769
695e12f8 2770static __be32
b37ad28b 2771nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2772{
e2f282b9
BH		 2773 if (!nfserr)
2774 nfsd4_encode_stateid(resp, &close->cl_stateid);
2775
695e12f8 2776 return nfserr;
1da177e4
LT		 2777}
2778
2779
695e12f8 2780static __be32
b37ad28b 2781nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2782{
bc749ca4 2783 __be32 *p;
1da177e4
LT		 2784
2785 if (!nfserr) {
ab4684d1
CL		 2786 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2787 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 2788 }
695e12f8 2789 return nfserr;
1da177e4
LT		 2790}
2791
695e12f8 2792static __be32
b37ad28b 2793nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2794{
bc749ca4 2795 __be32 *p;
1da177e4
LT		 2796
2797 if (!nfserr) {
2798 RESERVE_SPACE(32);
c654b8a9 2799 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2800 WRITE32(2);
2801 WRITE32(create->cr_bmval[0]);
2802 WRITE32(create->cr_bmval[1]);
1da177e4 2803 }
695e12f8 2804 return nfserr;
1da177e4
LT		 2805}
2806
b37ad28b
AV		 2807static __be32
2808nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2809{
2810 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2811 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2812
2813 if (nfserr)
2814 return nfserr;
2815
d5184658
BF		 2816 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2817 getattr->ga_bmval,
406a7ea9 2818 resp->rqstp, 0);
1da177e4
LT		 2819 return nfserr;
2820}
2821
695e12f8
BH		 2822static __be32
2823nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2824{
695e12f8 2825 struct svc_fh *fhp = *fhpp;
1da177e4 2826 unsigned int len;
bc749ca4 2827 __be32 *p;
1da177e4
LT		 2828
2829 if (!nfserr) {
2830 len = fhp->fh_handle.fh_size;
2831 RESERVE_SPACE(len + 4);
2832 WRITE32(len);
2833 WRITEMEM(&fhp->fh_handle.fh_base, len);
1da177e4 2834 }
695e12f8 2835 return nfserr;
1da177e4
LT		 2836}
2837
2838/*
2839* Including all fields other than the name, a LOCK4denied structure requires
2840* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2841*/
2842static void
2843nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2844{
7c13f344 2845 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2846 __be32 *p;
1da177e4 2847
7c13f344 2848 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2849 WRITE64(ld->ld_start);
2850 WRITE64(ld->ld_length);
2851 WRITE32(ld->ld_type);
7c13f344 2852 if (conf->len) {
1da177e4 2853 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2854 WRITE32(conf->len);
2855 WRITEMEM(conf->data, conf->len);
2856 kfree(conf->data);
1da177e4
LT		 2857 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2858 WRITE64((u64)0); /* clientid */
2859 WRITE32(0); /* length of owner name */
2860 }
1da177e4
LT		 2861}
2862
695e12f8 2863static __be32
b37ad28b 2864nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2865{
e2f282b9
BH		 2866 if (!nfserr)
2867 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2868 else if (nfserr == nfserr_denied)
1da177e4
LT		 2869 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2870
695e12f8 2871 return nfserr;
1da177e4
LT		 2872}
2873
695e12f8 2874static __be32
b37ad28b 2875nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2876{
2877 if (nfserr == nfserr_denied)
2878 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2879 return nfserr;
1da177e4
LT		 2880}
2881
695e12f8 2882static __be32
b37ad28b 2883nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2884{
e2f282b9
BH		 2885 if (!nfserr)
2886 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2887
695e12f8 2888 return nfserr;
1da177e4
LT		 2889}
2890
2891
695e12f8 2892static __be32
b37ad28b 2893nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2894{
bc749ca4 2895 __be32 *p;
1da177e4
LT		 2896
2897 if (!nfserr) {
2898 RESERVE_SPACE(20);
c654b8a9 2899 write_cinfo(&p, &link->li_cinfo);
1da177e4 2900 }
695e12f8 2901 return nfserr;
1da177e4
LT		 2902}
2903
2904
695e12f8 2905static __be32
b37ad28b 2906nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2907{
bc749ca4 2908 __be32 *p;
1da177e4
LT		 2909
2910 if (nfserr)
2911 goto out;
2912
e2f282b9
BH		 2913 nfsd4_encode_stateid(resp, &open->op_stateid);
2914 RESERVE_SPACE(40);
c654b8a9 2915 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2916 WRITE32(open->op_rflags);
2917 WRITE32(2);
2918 WRITE32(open->op_bmval[0]);
2919 WRITE32(open->op_bmval[1]);
2920 WRITE32(open->op_delegate_type);
1da177e4
LT		 2921
2922 switch (open->op_delegate_type) {
2923 case NFS4_OPEN_DELEGATE_NONE:
2924 break;
2925 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2926 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2927 RESERVE_SPACE(20);
7b190fec 2928 WRITE32(open->op_recall);
1da177e4
LT		 2929
2930 /*
2931 * TODO: ACE's in delegations
2932 */
2933 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2934 WRITE32(0);
2935 WRITE32(0);
2936 WRITE32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2937 break;
2938 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2939 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2940 RESERVE_SPACE(32);
1da177e4
LT		 2941 WRITE32(0);
2942
2943 /*
2944 * TODO: space_limit's in delegations
2945 */
2946 WRITE32(NFS4_LIMIT_SIZE);
2947 WRITE32(~(u32)0);
2948 WRITE32(~(u32)0);
2949
2950 /*
2951 * TODO: ACE's in delegations
2952 */
2953 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2954 WRITE32(0);
2955 WRITE32(0);
2956 WRITE32(0); /* XXX: is NULL principal ok? */
1da177e4 2957 break;
d24433cd
BH		 2958 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2959 switch (open->op_why_no_deleg) {
2960 case WND4_CONTENTION:
2961 case WND4_RESOURCE:
2962 RESERVE_SPACE(8);
2963 WRITE32(open->op_why_no_deleg);
2964 WRITE32(0); /* deleg signaling not supported yet */
2965 break;
2966 default:
2967 RESERVE_SPACE(4);
2968 WRITE32(open->op_why_no_deleg);
2969 }
d24433cd 2970 break;
1da177e4
LT		 2971 default:
2972 BUG();
2973 }
2974 /* XXX save filehandle here */
2975out:
695e12f8 2976 return nfserr;
1da177e4
LT		 2977}
2978
695e12f8 2979static __be32
b37ad28b 2980nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 2981{
e2f282b9
BH		 2982 if (!nfserr)
2983 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2984
695e12f8 2985 return nfserr;
1da177e4
LT		 2986}
2987
695e12f8 2988static __be32
b37ad28b 2989nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 2990{
e2f282b9
BH		 2991 if (!nfserr)
2992 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2993
695e12f8 2994 return nfserr;
1da177e4
LT		 2995}
2996
b37ad28b
AV		 2997static __be32
2998nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2999 struct nfsd4_read *read)
1da177e4
LT		 3000{
3001 u32 eof;
afc59400
BF		 3002 int v;
3003 struct page *page;
1da177e4 3004 unsigned long maxcount;
ddd1ea56 3005 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3006 int starting_len = xdr->buf->len;
1da177e4 3007 long len;
bc749ca4 3008 __be32 *p;
1da177e4
LT		 3009
3010 if (nfserr)
3011 return nfserr;
4aea24b2 3012 if (resp->xdr.buf->page_len)
1da177e4
LT		 3013 return nfserr_resource;
3014
3015 RESERVE_SPACE(8); /* eof flag and byte count */
3016
7adae489 3017 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 3018 if (maxcount > read->rd_length)
3019 maxcount = read->rd_length;
3020
3021 len = maxcount;
3022 v = 0;
3023 while (len > 0) {
afc59400
BF		 3024 page = *(resp->rqstp->rq_next_page);
3025 if (!page) { /* ran out of pages */
d5f50b0c
BF		 3026 maxcount -= len;
3027 break;
3028 }
afc59400 3029 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 3030 resp->rqstp->rq_vec[v].iov_len =
44524359 3031 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 3032 resp->rqstp->rq_next_page++;
1da177e4
LT		 3033 v++;
3034 len -= PAGE_SIZE;
3035 }
3036 read->rd_vlen = v;
3037
039a87ca 3038 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 3039 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 3040 &maxcount);
3041
d3f627c8 3042 if (nfserr) {
1fcea5b2
BF		 3043 /*
3044 * nfsd_splice_actor may have already messed with the
3045 * page length; reset it so as not to confuse
3046 * xdr_truncate_encode:
3047 */
3048 xdr->buf->page_len = 0;
3049 xdr_truncate_encode(xdr, starting_len);
1da177e4 3050 return nfserr;
d3f627c8 3051 }
44524359
N		 3052 eof = (read->rd_offset + maxcount >=
3053 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 3054
3055 WRITE32(eof);
3056 WRITE32(maxcount);
6ac90391
BF		 3057 WARN_ON_ONCE(resp->xdr.buf->head[0].iov_len != (char *)p
3058 - (char *)resp->xdr.buf->head[0].iov_base);
4aea24b2 3059 resp->xdr.buf->page_len = maxcount;
6ac90391 3060 xdr->buf->len += maxcount;
ddd1ea56 3061 xdr->iov = xdr->buf->tail;
1da177e4 3062
6ed6decc 3063 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3064 resp->xdr.buf->tail[0].iov_base = p;
3065 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3066 if (maxcount&3) {
6ed6decc
N		 3067 RESERVE_SPACE(4);
3068 WRITE32(0);
4aea24b2
BF		 3069 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3070 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
6ac90391 3071 xdr->buf->len -= (maxcount&3);
1da177e4
LT		 3072 }
3073 return 0;
3074}
3075
b37ad28b
AV		 3076static __be32
3077nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3078{
3079 int maxcount;
ddd1ea56 3080 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3081 char *page;
1fcea5b2 3082 int length_offset = xdr->buf->len;
bc749ca4 3083 __be32 *p;
1da177e4
LT		 3084
3085 if (nfserr)
3086 return nfserr;
4aea24b2 3087 if (resp->xdr.buf->page_len)
1da177e4 3088 return nfserr_resource;
afc59400 3089 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3090 return nfserr_resource;
1da177e4 3091
afc59400 3092 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3093
3094 maxcount = PAGE_SIZE;
3095 RESERVE_SPACE(4);
3096
3097 /*
3098 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3099 * if they would overflow the buffer. Is this kosher in NFSv4? If
3100 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3101 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3102 */
3103 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3104 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3105 nfserr = nfserr_inval;
3106 if (nfserr) {
1fcea5b2 3107 xdr_truncate_encode(xdr, length_offset);
1da177e4 3108 return nfserr;
d3f627c8 3109 }
1da177e4
LT		 3110
3111 WRITE32(maxcount);
4aea24b2
BF		 3112 resp->xdr.buf->head[0].iov_len = (char *)p
3113 - (char *)resp->xdr.buf->head[0].iov_base;
3114 resp->xdr.buf->page_len = maxcount;
6ac90391 3115 xdr->buf->len += maxcount;
ddd1ea56 3116 xdr->iov = xdr->buf->tail;
1da177e4 3117
6ed6decc 3118 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3119 resp->xdr.buf->tail[0].iov_base = p;
3120 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3121 if (maxcount&3) {
6ed6decc
N		 3122 RESERVE_SPACE(4);
3123 WRITE32(0);
4aea24b2
BF		 3124 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3125 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
1da177e4
LT		 3126 }
3127 return 0;
3128}
3129
b37ad28b
AV		 3130static __be32
3131nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3132{
3133 int maxcount;
3134 loff_t offset;
ddd1ea56 3135 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2
BF		 3136 int starting_len = xdr->buf->len;
3137 __be32 *page, *tailbase;
bc749ca4 3138 __be32 *p;
1da177e4
LT		 3139
3140 if (nfserr)
3141 return nfserr;
4aea24b2 3142 if (resp->xdr.buf->page_len)
1da177e4 3143 return nfserr_resource;
afc59400 3144 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3145 return nfserr_resource;
1da177e4 3146
ab4684d1 3147 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3148
3149 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3150 WRITE32(0);
3151 WRITE32(0);
4aea24b2
BF		 3152 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3153 - (char *)resp->xdr.buf->head[0].iov_base;
bb6e8a9f 3154 tailbase = p;
1da177e4
LT		 3155
3156 maxcount = PAGE_SIZE;
3157 if (maxcount > readdir->rd_maxcount)
3158 maxcount = readdir->rd_maxcount;
3159
3160 /*
3161 * Convert from bytes to words, account for the two words already
3162 * written, make sure to leave two words at the end for the next
3163 * pointer and eof field.
3164 */
3165 maxcount = (maxcount >> 2) - 4;
3166 if (maxcount < 0) {
3167 nfserr = nfserr_toosmall;
3168 goto err_no_verf;
3169 }
3170
afc59400 3171 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3172 readdir->common.err = 0;
3173 readdir->buflen = maxcount;
3174 readdir->buffer = page;
3175 readdir->offset = NULL;
3176
3177 offset = readdir->rd_cookie;
3178 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3179 &offset,
3180 &readdir->common, nfsd4_encode_dirent);
3181 if (nfserr == nfs_ok &&
3182 readdir->common.err == nfserr_toosmall &&
3183 readdir->buffer == page)
3184 nfserr = nfserr_toosmall;
1da177e4
LT		 3185 if (nfserr)
3186 goto err_no_verf;
3187
3188 if (readdir->offset)
3189 xdr_encode_hyper(readdir->offset, offset);
3190
3191 p = readdir->buffer;
3192 *p++ = 0; /* no more entries */
3193 *p++ = htonl(readdir->common.err == nfserr_eof);
4aea24b2 3194 resp->xdr.buf->page_len = ((char *)p) -
afc59400 3195 (char*)page_address(*(resp->rqstp->rq_next_page-1));
6ac90391 3196 xdr->buf->len += xdr->buf->page_len;
1da177e4 3197
ddd1ea56
BF		 3198 xdr->iov = xdr->buf->tail;
3199
bb6e8a9f 3200 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3201 resp->xdr.buf->tail[0].iov_base = tailbase;
3202 resp->xdr.buf->tail[0].iov_len = 0;
3203 resp->xdr.p = resp->xdr.buf->tail[0].iov_base;
3204 resp->xdr.end = resp->xdr.p +
3205 (PAGE_SIZE - resp->xdr.buf->head[0].iov_len)/4;
1da177e4
LT		 3206
3207 return 0;
3208err_no_verf:
1fcea5b2 3209 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3210 return nfserr;
3211}
3212
695e12f8 3213static __be32
b37ad28b 3214nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3215{
bc749ca4 3216 __be32 *p;
1da177e4
LT		 3217
3218 if (!nfserr) {
3219 RESERVE_SPACE(20);
c654b8a9 3220 write_cinfo(&p, &remove->rm_cinfo);
1da177e4 3221 }
695e12f8 3222 return nfserr;
1da177e4
LT		 3223}
3224
695e12f8 3225static __be32
b37ad28b 3226nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3227{
bc749ca4 3228 __be32 *p;
1da177e4
LT		 3229
3230 if (!nfserr) {
3231 RESERVE_SPACE(40);
c654b8a9
BF		 3232 write_cinfo(&p, &rename->rn_sinfo);
3233 write_cinfo(&p, &rename->rn_tinfo);
1da177e4 3234 }
695e12f8 3235 return nfserr;
1da177e4
LT		 3236}
3237
695e12f8 3238static __be32
22b6dee8 3239nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
a77c806f 3240 __be32 nfserr, struct svc_export *exp)
dcb488a3 3241{
676e4ebd 3242 u32 i, nflavs, supported;
4796f457
BF		 3243 struct exp_flavor_info *flavs;
3244 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3245 __be32 *p, *flavorsp;
3246 static bool report = true;
dcb488a3
AA		 3247
3248 if (nfserr)
3249 goto out;
4796f457
BF		 3250 if (exp->ex_nflavors) {
3251 flavs = exp->ex_flavors;
3252 nflavs = exp->ex_nflavors;
3253 } else { /* Handling of some defaults in absence of real secinfo: */
3254 flavs = def_flavs;
3255 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3256 nflavs = 2;
3257 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3258 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3259 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3260 nflavs = 1;
3261 flavs[0].pseudoflavor
3262 = svcauth_gss_flavor(exp->ex_client);
3263 } else {
3264 nflavs = 1;
3265 flavs[0].pseudoflavor
3266 = exp->ex_client->flavour->flavour;
3267 }
3268 }
3269
676e4ebd 3270 supported = 0;
dcb488a3 3271 RESERVE_SPACE(4);
676e4ebd 3272 flavorsp = p++; /* to be backfilled later */
676e4ebd 3273
4796f457 3274 for (i = 0; i < nflavs; i++) {
676e4ebd 3275 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3276 struct rpcsec_gss_info info;
dcb488a3 3277
676e4ebd
CL		 3278 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3279 supported++;
a9f7b4a0 3280 RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
dcb488a3 3281 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3282 WRITE32(info.oid.len);
3283 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3284 WRITE32(info.qop);
a77c806f 3285 WRITE32(info.service);
676e4ebd
CL		 3286 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3287 supported++;
dcb488a3 3288 RESERVE_SPACE(4);
676e4ebd 3289 WRITE32(pf);
676e4ebd
CL		 3290 } else {
3291 if (report)
3292 pr_warn("NFS: SECINFO: security flavor %u "
3293 "is not supported\n", pf);
dcb488a3
AA		 3294 }
3295 }
a77c806f 3296
676e4ebd
CL		 3297 if (nflavs != supported)
3298 report = false;
3299 *flavorsp = htonl(supported);
3300
dcb488a3
AA		 3301out:
3302 if (exp)
3303 exp_put(exp);
695e12f8 3304 return nfserr;
dcb488a3
AA		 3305}
3306
22b6dee8
MJ		 3307static __be32
3308nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3309 struct nfsd4_secinfo *secinfo)
3310{
3311 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3312}
3313
3314static __be32
3315nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3316 struct nfsd4_secinfo_no_name *secinfo)
3317{
3318 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3319}
3320
1da177e4
LT		 3321/*
3322 * The SETATTR encode routine is special -- it always encodes a bitmap,
3323 * regardless of the error status.
3324 */
695e12f8 3325static __be32
b37ad28b 3326nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3327{
bc749ca4 3328 __be32 *p;
1da177e4 3329
18032ca0 3330 RESERVE_SPACE(16);
1da177e4 3331 if (nfserr) {
18032ca0
DQ		 3332 WRITE32(3);
3333 WRITE32(0);
1da177e4
LT		 3334 WRITE32(0);
3335 WRITE32(0);
3336 }
3337 else {
18032ca0 3338 WRITE32(3);
1da177e4
LT		 3339 WRITE32(setattr->sa_bmval[0]);
3340 WRITE32(setattr->sa_bmval[1]);
18032ca0 3341 WRITE32(setattr->sa_bmval[2]);
1da177e4 3342 }
695e12f8 3343 return nfserr;
1da177e4
LT		 3344}
3345
695e12f8 3346static __be32
b37ad28b 3347nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3348{
bc749ca4 3349 __be32 *p;
1da177e4
LT		 3350
3351 if (!nfserr) {
ab4684d1 3352 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3353 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3354 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3355 }
3356 else if (nfserr == nfserr_clid_inuse) {
3357 RESERVE_SPACE(8);
3358 WRITE32(0);
3359 WRITE32(0);
1da177e4 3360 }
695e12f8 3361 return nfserr;
1da177e4
LT		 3362}
3363
695e12f8 3364static __be32
b37ad28b 3365nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3366{
bc749ca4 3367 __be32 *p;
1da177e4
LT		 3368
3369 if (!nfserr) {
3370 RESERVE_SPACE(16);
3371 WRITE32(write->wr_bytes_written);
3372 WRITE32(write->wr_how_written);
ab4684d1 3373 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4 3374 }
695e12f8 3375 return nfserr;
1da177e4
LT		 3376}
3377
57266a6e
BF		 3378static const u32 nfs4_minimal_spo_must_enforce[2] = {
3379 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3380 1 << (OP_EXCHANGE_ID - 32) |
3381 1 << (OP_CREATE_SESSION - 32) |
3382 1 << (OP_DESTROY_SESSION - 32) |
3383 1 << (OP_DESTROY_CLIENTID - 32)
3384};
3385
2db134eb 3386static __be32
57b7b43b 3387nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3388 struct nfsd4_exchange_id *exid)
3389{
bc749ca4 3390 __be32 *p;
0733d213
AA		 3391 char *major_id;
3392 char *server_scope;
3393 int major_id_sz;
3394 int server_scope_sz;
3395 uint64_t minor_id = 0;
3396
3397 if (nfserr)
3398 return nfserr;
3399
3400 major_id = utsname()->nodename;
3401 major_id_sz = strlen(major_id);
3402 server_scope = utsname()->nodename;
3403 server_scope_sz = strlen(server_scope);
3404
3405 RESERVE_SPACE(
3406 8 /* eir_clientid */ +
3407 4 /* eir_sequenceid */ +
3408 4 /* eir_flags */ +
a8bb84bc 3409 4 /* spr_how */);
0733d213
AA		 3410
3411 WRITEMEM(&exid->clientid, 8);
3412 WRITE32(exid->seqid);
3413 WRITE32(exid->flags);
3414
0733d213 3415 WRITE32(exid->spa_how);
a8bb84bc 3416
57266a6e
BF		 3417 switch (exid->spa_how) {
3418 case SP4_NONE:
3419 break;
3420 case SP4_MACH_CRED:
a8bb84bc
KM		 3421 /* spo_must_enforce, spo_must_allow */
3422 RESERVE_SPACE(16);
3423
57266a6e
BF		 3424 /* spo_must_enforce bitmap: */
3425 WRITE32(2);
3426 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3427 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3428 /* empty spo_must_allow bitmap: */
3429 WRITE32(0);
a8bb84bc 3430
57266a6e
BF		 3431 break;
3432 default:
3433 WARN_ON_ONCE(1);
3434 }
0733d213 3435
a8bb84bc
KM		 3436 RESERVE_SPACE(
3437 8 /* so_minor_id */ +
3438 4 /* so_major_id.len */ +
3439 (XDR_QUADLEN(major_id_sz) * 4) +
3440 4 /* eir_server_scope.len */ +
3441 (XDR_QUADLEN(server_scope_sz) * 4) +
3442 4 /* eir_server_impl_id.count (0) */);
3443
0733d213
AA		 3444 /* The server_owner struct */
3445 WRITE64(minor_id); /* Minor id */
3446 /* major id */
3447 WRITE32(major_id_sz);
3448 WRITEMEM(major_id, major_id_sz);
3449
3450 /* Server scope */
3451 WRITE32(server_scope_sz);
3452 WRITEMEM(server_scope, server_scope_sz);
3453
3454 /* Implementation id */
3455 WRITE32(0); /* zero length nfs_impl_id4 array */
0733d213 3456 return 0;
2db134eb
AA		 3457}
3458
3459static __be32
57b7b43b 3460nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3461 struct nfsd4_create_session *sess)
3462{
bc749ca4 3463 __be32 *p;
ec6b5d7b
AA		 3464
3465 if (nfserr)
3466 return nfserr;
3467
3468 RESERVE_SPACE(24);
3469 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3470 WRITE32(sess->seqid);
3471 WRITE32(sess->flags);
ec6b5d7b
AA		 3472
3473 RESERVE_SPACE(28);
3474 WRITE32(0); /* headerpadsz */
3475 WRITE32(sess->fore_channel.maxreq_sz);
3476 WRITE32(sess->fore_channel.maxresp_sz);
3477 WRITE32(sess->fore_channel.maxresp_cached);
3478 WRITE32(sess->fore_channel.maxops);
3479 WRITE32(sess->fore_channel.maxreqs);
3480 WRITE32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3481
3482 if (sess->fore_channel.nr_rdma_attrs) {
3483 RESERVE_SPACE(4);
3484 WRITE32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3485 }
3486
3487 RESERVE_SPACE(28);
3488 WRITE32(0); /* headerpadsz */
3489 WRITE32(sess->back_channel.maxreq_sz);
3490 WRITE32(sess->back_channel.maxresp_sz);
3491 WRITE32(sess->back_channel.maxresp_cached);
3492 WRITE32(sess->back_channel.maxops);
3493 WRITE32(sess->back_channel.maxreqs);
3494 WRITE32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3495
3496 if (sess->back_channel.nr_rdma_attrs) {
3497 RESERVE_SPACE(4);
3498 WRITE32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3499 }
3500 return 0;
2db134eb
AA		 3501}
3502
c47d832b 3503static __be32
57b7b43b 3504nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3505 struct nfsd4_sequence *seq)
3506{
bc749ca4 3507 __be32 *p;
b85d4c01
BH		 3508
3509 if (nfserr)
3510 return nfserr;
3511
3512 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3513 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3514 WRITE32(seq->seqid);
3515 WRITE32(seq->slotid);
b7d7ca35
BF		 3516 /* Note slotid's are numbered from zero: */
3517 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3518 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3519 WRITE32(seq->status_flags);
b85d4c01 3520
557ce264 3521 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3522 return 0;
2db134eb
AA		 3523}
3524
2355c596 3525static __be32
57b7b43b 3526nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3527 struct nfsd4_test_stateid *test_stateid)
3528{
03cfb420 3529 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3530 __be32 *p;
17456804 3531
a11fcce1
BF		 3532 if (nfserr)
3533 return nfserr;
3534
03cfb420 3535 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3536 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3537
03cfb420 3538 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3539 *p++ = stateid->ts_id_status;
17456804 3540 }
17456804
BS		 3541
3542 return nfserr;
3543}
3544
695e12f8
BH		 3545static __be32
3546nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3547{
3548 return nfserr;
3549}
3550
3551typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3552
2db134eb
AA		 3553/*
3554 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3555 * since we don't need to filter out obsolete ops as this is
3556 * done in the decoding phase.
3557 */
695e12f8 3558static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3559 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3560 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3561 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3562 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3563 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3564 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3565 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3566 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3567 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3568 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3569 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3570 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3571 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3572 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3573 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3574 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3575 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3576 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3577 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3578 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3579 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3580 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3581 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3582 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3583 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3584 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3585 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3586 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3587 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3588 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3589 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3590 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3591 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3592 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3593 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3594 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3595 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3596
3597 /* NFSv4.1 operations */
3598 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3599 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3600 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3601 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3602 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3603 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3604 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3605 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3606 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3607 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3608 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3609 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3610 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3611 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3612 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3613 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3614 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3615 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3616 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3617};
3618
496c262c
AA		 3619/*
3620 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3621 * after encoding the current operation with pad.
496c262c 3622 *
58e7b33a
MJ		 3623 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3624 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3625 *
58e7b33a 3626 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3627 *
3628 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3629 * will be at least a page and will therefore hold the xdr_buf head.
3630 */
57b7b43b 3631__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3632{
496c262c 3633 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3634 struct nfsd4_session *session = NULL;
3635 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3636 u32 length, tlen = 0;
496c262c
AA		 3637
3638 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3639 return 0;
496c262c
AA		 3640
3641 session = resp->cstate.session;
496c262c
AA		 3642
3643 if (xb->page_len == 0) {
4aea24b2 3644 length = (char *)resp->xdr.p - (char *)xb->head[0].iov_base + pad;
496c262c
AA		 3645 } else {
3646 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
4aea24b2 3647 tlen = (char *)resp->xdr.p - (char *)xb->tail[0].iov_base;
496c262c
AA		 3648
3649 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3650 }
3651 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3652 length, xb->page_len, tlen, pad);
3653
58e7b33a
MJ		 3654 if (length > session->se_fchannel.maxresp_sz)
3655 return nfserr_rep_too_big;
3656
73e79482 3657 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3658 length > session->se_fchannel.maxresp_cached)
496c262c 3659 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3660
3661 return 0;
496c262c
AA		 3662}
3663
1da177e4
LT		 3664void
3665nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3666{
9411b1d4 3667 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3668 struct svc_rqst *rqstp = resp->rqstp;
2ebbc012 3669 __be32 *statp;
07d1f802 3670 nfsd4_enc encoder;
bc749ca4 3671 __be32 *p;
1da177e4
LT		 3672
3673 RESERVE_SPACE(8);
3674 WRITE32(op->opnum);
3675 statp = p++; /* to be backfilled at the end */
1da177e4 3676
695e12f8
BH		 3677 if (op->opnum == OP_ILLEGAL)
3678 goto status;
3679 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3680 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3681 encoder = nfsd4_enc_ops[op->opnum];
3682 op->status = encoder(resp, op->status, &op->u);
067e1ace 3683 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3684 if (!op->status) {
3685 int space_needed = 0;
3686 if (!nfsd4_last_compound_op(rqstp))
3687 space_needed = COMPOUND_ERR_SLACK_SPACE;
3688 op->status = nfsd4_check_resp_size(resp, space_needed);
3689 }
07d1f802
BF		 3690 if (op->status == nfserr_resource ||
3691 op->status == nfserr_rep_too_big ||
3692 op->status == nfserr_rep_too_big_to_cache) {
3693 /*
3694 * The operation may have already been encoded or
3695 * partially encoded. No op returns anything additional
3696 * in the case of one of these three errors, so we can
3697 * just truncate back to after the status. But it's a
3698 * bug if we had to do this on a non-idempotent op:
3699 */
3700 warn_on_nonidempotent_op(op);
3701 resp->xdr.p = statp + 1;
3702 }
9411b1d4
BF		 3703 if (so) {
3704 so->so_replay.rp_status = op->status;
4aea24b2
BF		 3705 so->so_replay.rp_buflen = (char *)resp->xdr.p
3706 - (char *)(statp+1);
9411b1d4
BF		 3707 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3708 }
695e12f8 3709status:
1da177e4
LT		 3710 /*
3711 * Note: We write the status directly, instead of using WRITE32(),
3712 * since it is already in network byte order.
3713 */
3714 *statp = op->status;
3715}
3716
3717/*
3718 * Encode the reply stored in the stateowner reply cache
3719 *
3720 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3721 * previously sent already encoded operation.
3722 *
3723 * called with nfs4_lock_state() held
3724 */
3725void
3726nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3727{
bc749ca4 3728 __be32 *p;
1da177e4
LT		 3729 struct nfs4_replay *rp = op->replay;
3730
3731 BUG_ON(!rp);
3732
3733 RESERVE_SPACE(8);
3734 WRITE32(op->opnum);
3735 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4
LT		 3736
3737 RESERVE_SPACE(rp->rp_buflen);
3738 WRITEMEM(rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3739}
3740
1da177e4 3741int
2ebbc012 3742nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3743{
3744 return xdr_ressize_check(rqstp, p);
3745}
3746
3e98abff 3747int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3748{
3e98abff
BF		 3749 struct svc_rqst *rqstp = rq;
3750 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3751
1da177e4
LT		 3752 if (args->ops != args->iops) {
3753 kfree(args->ops);
3754 args->ops = args->iops;
3755 }
f99d49ad
JJ		 3756 kfree(args->tmpp);
3757 args->tmpp = NULL;
1da177e4
LT		 3758 while (args->to_free) {
3759 struct tmpbuf *tb = args->to_free;
3760 args->to_free = tb->next;
3761 tb->release(tb->buf);
3762 kfree(tb);
3763 }
3e98abff 3764 return 1;
1da177e4
LT		 3765}
3766
3767int
2ebbc012 3768nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3769{
e874f9f8
JL		 3770 if (rqstp->rq_arg.head[0].iov_len % 4) {
3771 /* client is nuts */
3772 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3773 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3774 return 0;
3775 }
1da177e4
LT		 3776 args->p = p;
3777 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3778 args->pagelist = rqstp->rq_arg.pages;
3779 args->pagelen = rqstp->rq_arg.page_len;
3780 args->tmpp = NULL;
3781 args->to_free = NULL;
3782 args->ops = args->iops;
3783 args->rqstp = rqstp;
3784
3e98abff 3785 return !nfsd4_decode_compound(args);
1da177e4
LT		 3786}
3787
3788int
2ebbc012 3789nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3790{
3791 /*
3792 * All that remains is to write the tag and operation count...
3793 */
557ce264 3794 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 3795 struct xdr_buf *buf = resp->xdr.buf;
3796
3797 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
3798 buf->tail[0].iov_len);
dd97fdde 3799
1da177e4
LT		 3800 p = resp->tagp;
3801 *p++ = htonl(resp->taglen);
3802 memcpy(p, resp->tag, resp->taglen);
3803 p += XDR_QUADLEN(resp->taglen);
3804 *p++ = htonl(resp->opcnt);
3805
26c0c75e 3806 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 3807 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3808 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 3809 if (cs->status != nfserr_replay_cache) {
3810 nfsd4_store_cache_entry(resp);
73e79482 3811 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3812 }
d7682988 3813 /* Renew the clientid on success and on replay */
f0f51f5c 3814 spin_lock(&nn->client_lock);
221a6876 3815 nfsd4_put_session(cs->session);
f0f51f5c
BF		 3816 spin_unlock(&nn->client_lock);
3817 put_client_renew(clp);
da3846a2 3818 }
1da177e4
LT		 3819 return 1;
3820}
3821
3822/*
3823 * Local variables:
3824 * c-basic-offset: 8
3825 * End:
3826 */
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