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nfsd4: separate splice and readv cases
[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
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));
3b299709 1036 READ32(readdir->rd_dircount);
1da177e4
LT		 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
b37ad28b 1608static __be32
1da177e4
LT		 1609nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1610{
1611 DECODE_HEAD;
1612 struct nfsd4_op *op;
1091006c 1613 bool cachethis = false;
4f0cefbf 1614 int max_reply = 2 * RPC_MAX_AUTH_SIZE + 8; /* opcnt, status */
b0e35fda
BF		 1615 int readcount = 0;
1616 int readbytes = 0;
1da177e4
LT		 1617 int i;
1618
1da177e4
LT		 1619 READ_BUF(4);
1620 READ32(argp->taglen);
1621 READ_BUF(argp->taglen + 8);
1622 SAVEMEM(argp->tag, argp->taglen);
1623 READ32(argp->minorversion);
1624 READ32(argp->opcnt);
4f0cefbf 1625 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1626
1627 if (argp->taglen > NFSD4_MAX_TAGLEN)
1628 goto xdr_error;
1629 if (argp->opcnt > 100)
1630 goto xdr_error;
1631
e8c96f8c 1632 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1633 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1634 if (!argp->ops) {
1635 argp->ops = argp->iops;
817cb9d4 1636 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1637 goto xdr_error;
1638 }
1639 }
1640
e1a90ebd 1641 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1642 argp->opcnt = 0;
1643
1da177e4
LT		 1644 for (i = 0; i < argp->opcnt; i++) {
1645 op = &argp->ops[i];
1646 op->replay = NULL;
1647
8a61b18c
BF		 1648 READ_BUF(4);
1649 READ32(op->opnum);
1da177e4 1650
e1a90ebd
AS		 1651 if (nfsd4_opnum_in_range(argp, op))
1652 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1653 else {
1da177e4
LT		 1654 op->opnum = OP_ILLEGAL;
1655 op->status = nfserr_op_illegal;
1da177e4 1656 }
1091006c
BF		 1657 /*
1658 * We'll try to cache the result in the DRC if any one
1659 * op in the compound wants to be cached:
1660 */
1661 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1662
b0e35fda
BF		 1663 if (op->opnum == OP_READ) {
1664 readcount++;
1665 readbytes += nfsd4_max_reply(argp->rqstp, op);
1666 } else
1667 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1668
1669 if (op->status) {
1670 argp->opcnt = i+1;
1671 break;
1672 }
1da177e4 1673 }
1091006c
BF		 1674 /* Sessions make the DRC unnecessary: */
1675 if (argp->minorversion)
1676 cachethis = false;
b0e35fda 1677 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1678 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1679
b0e35fda
BF		 1680 if (readcount > 1 || max_reply > PAGE_SIZE - 2*RPC_MAX_AUTH_SIZE)
1681 argp->rqstp->rq_splice_ok = false;
1682
1da177e4
LT		 1683 DECODE_TAIL;
1684}
1da177e4 1685
1da177e4
LT		 1686#define WRITE32(n) *p++ = htonl(n)
1687#define WRITE64(n) do { \
1688 *p++ = htonl((u32)((n) >> 32)); \
1689 *p++ = htonl((u32)(n)); \
1690} while (0)
5108b276 1691#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1692 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1693 memcpy(p, ptr, nbytes); \
1694 p += XDR_QUADLEN(nbytes); \
5108b276 1695}} while (0)
c654b8a9
BF		 1696
1697static void write32(__be32 **p, u32 n)
1698{
45eaa1c1 1699 *(*p)++ = htonl(n);
c654b8a9
BF		 1700}
1701
1702static void write64(__be32 **p, u64 n)
1703{
45eaa1c1 1704 write32(p, (n >> 32));
c654b8a9
BF		 1705 write32(p, (u32)n);
1706}
1707
1708static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1709{
1710 if (IS_I_VERSION(inode)) {
1711 write64(p, inode->i_version);
1712 } else {
1713 write32(p, stat->ctime.tv_sec);
1714 write32(p, stat->ctime.tv_nsec);
1715 }
1716}
1717
1718static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1719{
1720 write32(p, c->atomic);
1721 if (c->change_supported) {
1722 write64(p, c->before_change);
1723 write64(p, c->after_change);
1724 } else {
1725 write32(p, c->before_ctime_sec);
1726 write32(p, c->before_ctime_nsec);
1727 write32(p, c->after_ctime_sec);
1728 write32(p, c->after_ctime_nsec);
1729 }
1730}
1da177e4 1731
81c3f413 1732/* Encode as an array of strings the string given with components
e7a0444a 1733 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1734 */
ddd1ea56
BF		 1735static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1736 char *components, char esc_enter,
1737 char esc_exit)
81c3f413 1738{
ddd1ea56 1739 __be32 *p;
082d4bd7
BF		 1740 __be32 pathlen;
1741 int pathlen_offset;
81c3f413 1742 int strlen, count=0;
e7a0444a 1743 char *str, *end, *next;
81c3f413
BF		 1744
1745 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1746
1747 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1748 p = xdr_reserve_space(xdr, 4);
1749 if (!p)
81c3f413 1750 return nfserr_resource;
082d4bd7
BF		 1751 p++; /* We will fill this in with @count later */
1752
81c3f413
BF		 1753 end = str = components;
1754 while (*end) {
e7a0444a
WAA		 1755 bool found_esc = false;
1756
1757 /* try to parse as esc_start, ..., esc_end, sep */
1758 if (*str == esc_enter) {
1759 for (; *end && (*end != esc_exit); end++)
1760 /* find esc_exit or end of string */;
1761 next = end + 1;
1762 if (*end && (!*next || *next == sep)) {
1763 str++;
1764 found_esc = true;
1765 }
1766 }
1767
1768 if (!found_esc)
1769 for (; *end && (*end != sep); end++)
1770 /* find sep or end of string */;
1771
81c3f413
BF		 1772 strlen = end - str;
1773 if (strlen) {
ddd1ea56
BF		 1774 p = xdr_reserve_space(xdr, strlen + 4);
1775 if (!p)
81c3f413
BF		 1776 return nfserr_resource;
1777 WRITE32(strlen);
1778 WRITEMEM(str, strlen);
1779 count++;
1780 }
1781 else
1782 end++;
1783 str = end;
1784 }
082d4bd7
BF		 1785 pathlen = htonl(xdr->buf->len - pathlen_offset);
1786 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1787 return 0;
1788}
1789
e7a0444a
WAA		 1790/* Encode as an array of strings the string given with components
1791 * separated @sep.
1792 */
ddd1ea56
BF		 1793static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1794 char *components)
e7a0444a 1795{
ddd1ea56 1796 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1797}
1798
81c3f413
BF		 1799/*
1800 * encode a location element of a fs_locations structure
1801 */
ddd1ea56
BF		 1802static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1803 struct nfsd4_fs_location *location)
81c3f413 1804{
b37ad28b 1805 __be32 status;
81c3f413 1806
ddd1ea56 1807 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1808 '[', ']');
81c3f413
BF		 1809 if (status)
1810 return status;
ddd1ea56 1811 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1812 if (status)
1813 return status;
81c3f413
BF		 1814 return 0;
1815}
1816
1817/*
ed748aac 1818 * Encode a path in RFC3530 'pathname4' format
81c3f413 1819 */
ddd1ea56
BF		 1820static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1821 const struct path *root,
1822 const struct path *path)
81c3f413 1823{
301f0268 1824 struct path cur = *path;
ddd1ea56 1825 __be32 *p;
ed748aac
TM		 1826 struct dentry **components = NULL;
1827 unsigned int ncomponents = 0;
1828 __be32 err = nfserr_jukebox;
81c3f413 1829
ed748aac 1830 dprintk("nfsd4_encode_components(");
81c3f413 1831
ed748aac
TM		 1832 path_get(&cur);
1833 /* First walk the path up to the nfsd root, and store the
1834 * dentries/path components in an array.
1835 */
1836 for (;;) {
1837 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1838 break;
1839 if (cur.dentry == cur.mnt->mnt_root) {
1840 if (follow_up(&cur))
1841 continue;
1842 goto out_free;
1843 }
1844 if ((ncomponents & 15) == 0) {
1845 struct dentry **new;
1846 new = krealloc(components,
1847 sizeof(*new) * (ncomponents + 16),
1848 GFP_KERNEL);
1849 if (!new)
1850 goto out_free;
1851 components = new;
1852 }
1853 components[ncomponents++] = cur.dentry;
1854 cur.dentry = dget_parent(cur.dentry);
1855 }
ddd1ea56
BF		 1856 err = nfserr_resource;
1857 p = xdr_reserve_space(xdr, 4);
1858 if (!p)
ed748aac
TM		 1859 goto out_free;
1860 WRITE32(ncomponents);
1861
1862 while (ncomponents) {
1863 struct dentry *dentry = components[ncomponents - 1];
301f0268 1864 unsigned int len;
ed748aac 1865
301f0268
AV		 1866 spin_lock(&dentry->d_lock);
1867 len = dentry->d_name.len;
ddd1ea56
BF		 1868 p = xdr_reserve_space(xdr, len + 4);
1869 if (!p) {
301f0268 1870 spin_unlock(&dentry->d_lock);
ed748aac 1871 goto out_free;
301f0268 1872 }
ed748aac
TM		 1873 WRITE32(len);
1874 WRITEMEM(dentry->d_name.name, len);
1875 dprintk("/%s", dentry->d_name.name);
301f0268 1876 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1877 dput(dentry);
1878 ncomponents--;
81c3f413 1879 }
ed748aac 1880
ed748aac
TM		 1881 err = 0;
1882out_free:
1883 dprintk(")\n");
1884 while (ncomponents)
1885 dput(components[--ncomponents]);
1886 kfree(components);
1887 path_put(&cur);
1888 return err;
1889}
1890
ddd1ea56
BF		 1891static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1892 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1893{
1894 struct svc_export *exp_ps;
1895 __be32 res;
1896
1897 exp_ps = rqst_find_fsidzero_export(rqstp);
1898 if (IS_ERR(exp_ps))
1899 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1900 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1901 exp_put(exp_ps);
1902 return res;
81c3f413
BF		 1903}
1904
1905/*
1906 * encode a fs_locations structure
1907 */
ddd1ea56
BF		 1908static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1909 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1910{
b37ad28b 1911 __be32 status;
cc45f017 1912 int i;
ddd1ea56 1913 __be32 *p;
81c3f413 1914 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1915
ddd1ea56 1916 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1917 if (status)
1918 return status;
ddd1ea56
BF		 1919 p = xdr_reserve_space(xdr, 4);
1920 if (!p)
81c3f413
BF		 1921 return nfserr_resource;
1922 WRITE32(fslocs->locations_count);
1923 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1924 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1925 if (status)
1926 return status;
1927 }
81c3f413
BF		 1928 return 0;
1929}
1da177e4 1930
3d2544b1
BF		 1931static u32 nfs4_file_type(umode_t mode)
1932{
1933 switch (mode & S_IFMT) {
1934 case S_IFIFO: return NF4FIFO;
1935 case S_IFCHR: return NF4CHR;
1936 case S_IFDIR: return NF4DIR;
1937 case S_IFBLK: return NF4BLK;
1938 case S_IFLNK: return NF4LNK;
1939 case S_IFREG: return NF4REG;
1940 case S_IFSOCK: return NF4SOCK;
1941 default: return NF4BAD;
1942 };
1943}
1da177e4 1944
b37ad28b 1945static inline __be32
ddd1ea56
BF		 1946nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1947 struct nfs4_ace *ace)
1da177e4 1948{
3554116d 1949 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1950 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1951 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1952 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1953 else
ddd1ea56 1954 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1955}
1956
42ca0993
BF		 1957#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1958 FATTR4_WORD0_RDATTR_ERROR)
1959#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1960
18032ca0
DQ		 1961#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1962static inline __be32
ddd1ea56
BF		 1963nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1964 void *context, int len)
18032ca0 1965{
ddd1ea56 1966 __be32 *p;
18032ca0 1967
ddd1ea56
BF		 1968 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1969 if (!p)
18032ca0
DQ		 1970 return nfserr_resource;
1971
1972 /*
1973 * For now we use a 0 here to indicate the null translation; in
1974 * the future we may place a call to translation code here.
1975 */
18032ca0
DQ		 1976 WRITE32(0); /* lfs */
1977 WRITE32(0); /* pi */
1978 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1979 return 0;
1980}
1981#else
1982static inline __be32
ddd1ea56
BF		 1983nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1984 void *context, int len)
18032ca0
DQ		 1985{ return 0; }
1986#endif
1987
b37ad28b 1988static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1989{
1990 /* As per referral draft: */
1991 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1992 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1993 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1994 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1995 *rdattr_err = NFSERR_MOVED;
1996 else
1997 return nfserr_moved;
1998 }
1999 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2000 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2001 return 0;
2002}
1da177e4 2003
ae7095a7
BF		 2004
2005static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2006{
2007 struct path path = exp->ex_path;
2008 int err;
2009
2010 path_get(&path);
2011 while (follow_up(&path)) {
2012 if (path.dentry != path.mnt->mnt_root)
2013 break;
2014 }
3dadecce 2015 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2016 path_put(&path);
2017 return err;
2018}
2019
1da177e4
LT		 2020/*
2021 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2022 * ourselves.
1da177e4 2023 */
b37ad28b 2024__be32
d5184658
BF		 2025nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2026 struct svc_export *exp,
2027 struct dentry *dentry, u32 *bmval,
406a7ea9 2028 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2029{
2030 u32 bmval0 = bmval[0];
2031 u32 bmval1 = bmval[1];
7e705706 2032 u32 bmval2 = bmval[2];
1da177e4 2033 struct kstat stat;
d50e6136 2034 struct svc_fh *tempfh = NULL;
1da177e4 2035 struct kstatfs statfs;
ddd1ea56 2036 __be32 *p;
1fcea5b2 2037 int starting_len = xdr->buf->len;
082d4bd7
BF		 2038 int attrlen_offset;
2039 __be32 attrlen;
1da177e4
LT		 2040 u32 dummy;
2041 u64 dummy64;
42ca0993 2042 u32 rdattr_err = 0;
b37ad28b 2043 __be32 status;
b8dd7b9a 2044 int err;
1da177e4
LT		 2045 int aclsupport = 0;
2046 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2047 void *context = NULL;
2048 int contextlen;
2049 bool contextsupport = false;
7e705706
AA		 2050 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2051 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2052 struct path path = {
2053 .mnt = exp->ex_path.mnt,
2054 .dentry = dentry,
2055 };
3d733711 2056 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2057
2058 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2059 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2060 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2061 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2062
42ca0993 2063 if (exp->ex_fslocs.migrated) {
7e705706 2064 BUG_ON(bmval[2]);
42ca0993
BF		 2065 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2066 if (status)
2067 goto out;
2068 }
2069
3dadecce 2070 err = vfs_getattr(&path, &stat);
b8dd7b9a 2071 if (err)
1da177e4 2072 goto out_nfserr;
a16e92ed
BF		 2073 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2074 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2075 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2076 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2077 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2078 if (err)
1da177e4
LT		 2079 goto out_nfserr;
2080 }
2081 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2082 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2083 status = nfserr_jukebox;
2084 if (!tempfh)
2085 goto out;
2086 fh_init(tempfh, NFS4_FHSIZE);
2087 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2088 if (status)
2089 goto out;
d50e6136 2090 fhp = tempfh;
1da177e4
LT		 2091 }
2092 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2093 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2094 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2095 aclsupport = (err == 0);
1da177e4 2096 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2097 if (err == -EOPNOTSUPP)
1da177e4 2098 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2099 else if (err == -EINVAL) {
1da177e4
LT		 2100 status = nfserr_attrnotsupp;
2101 goto out;
b8dd7b9a 2102 } else if (err != 0)
1da177e4
LT		 2103 goto out_nfserr;
2104 }
2105 }
1da177e4 2106
18032ca0
DQ		 2107#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2108 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2109 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2110 err = security_inode_getsecctx(dentry->d_inode,
2111 &context, &contextlen);
2112 contextsupport = (err == 0);
2113 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2114 if (err == -EOPNOTSUPP)
2115 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2116 else if (err)
2117 goto out_nfserr;
2118 }
2119 }
2120#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2121
2b44f1ba 2122 if (bmval2) {
ddd1ea56
BF		 2123 p = xdr_reserve_space(xdr, 16);
2124 if (!p)
2b44f1ba 2125 goto out_resource;
7e705706
AA		 2126 WRITE32(3);
2127 WRITE32(bmval0);
2128 WRITE32(bmval1);
2129 WRITE32(bmval2);
2b44f1ba 2130 } else if (bmval1) {
ddd1ea56
BF		 2131 p = xdr_reserve_space(xdr, 12);
2132 if (!p)
2b44f1ba 2133 goto out_resource;
7e705706
AA		 2134 WRITE32(2);
2135 WRITE32(bmval0);
2136 WRITE32(bmval1);
2137 } else {
ddd1ea56
BF		 2138 p = xdr_reserve_space(xdr, 8);
2139 if (!p)
2b44f1ba 2140 goto out_resource;
7e705706
AA		 2141 WRITE32(1);
2142 WRITE32(bmval0);
2143 }
082d4bd7
BF		 2144
2145 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2146 p = xdr_reserve_space(xdr, 4);
2147 if (!p)
2148 goto out_resource;
082d4bd7 2149 p++; /* to be backfilled later */
1da177e4
LT		 2150
2151 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2152 u32 word0 = nfsd_suppattrs0(minorversion);
2153 u32 word1 = nfsd_suppattrs1(minorversion);
2154 u32 word2 = nfsd_suppattrs2(minorversion);
2155
42ca0993
BF		 2156 if (!aclsupport)
2157 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2158 if (!contextsupport)
2159 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2160 if (!word2) {
ddd1ea56
BF		 2161 p = xdr_reserve_space(xdr, 12);
2162 if (!p)
2b44f1ba 2163 goto out_resource;
7e705706
AA		 2164 WRITE32(2);
2165 WRITE32(word0);
2166 WRITE32(word1);
2167 } else {
ddd1ea56
BF		 2168 p = xdr_reserve_space(xdr, 16);
2169 if (!p)
2b44f1ba 2170 goto out_resource;
7e705706
AA		 2171 WRITE32(3);
2172 WRITE32(word0);
2173 WRITE32(word1);
2174 WRITE32(word2);
2175 }
1da177e4
LT		 2176 }
2177 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2178 p = xdr_reserve_space(xdr, 4);
2179 if (!p)
1da177e4 2180 goto out_resource;
3d2544b1 2181 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2182 if (dummy == NF4BAD) {
2183 status = nfserr_serverfault;
2184 goto out;
2185 }
1da177e4
LT		 2186 WRITE32(dummy);
2187 }
2188 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2189 p = xdr_reserve_space(xdr, 4);
2190 if (!p)
1da177e4 2191 goto out_resource;
49640001 2192 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2193 WRITE32(NFS4_FH_PERSISTENT);
49640001 2194 else
e34ac862 2195 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2196 }
2197 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2198 p = xdr_reserve_space(xdr, 8);
2199 if (!p)
1da177e4 2200 goto out_resource;
c654b8a9 2201 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2202 }
2203 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2204 p = xdr_reserve_space(xdr, 8);
2205 if (!p)
1da177e4
LT		 2206 goto out_resource;
2207 WRITE64(stat.size);
2208 }
2209 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2210 p = xdr_reserve_space(xdr, 4);
2211 if (!p)
1da177e4
LT		 2212 goto out_resource;
2213 WRITE32(1);
2214 }
2215 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2216 p = xdr_reserve_space(xdr, 4);
2217 if (!p)
1da177e4
LT		 2218 goto out_resource;
2219 WRITE32(1);
2220 }
2221 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2222 p = xdr_reserve_space(xdr, 4);
2223 if (!p)
1da177e4
LT		 2224 goto out_resource;
2225 WRITE32(0);
2226 }
2227 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2228 p = xdr_reserve_space(xdr, 16);
2229 if (!p)
1da177e4 2230 goto out_resource;
42ca0993
BF		 2231 if (exp->ex_fslocs.migrated) {
2232 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2233 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2234 } else switch(fsid_source(fhp)) {
2235 case FSIDSOURCE_FSID:
1da177e4
LT		 2236 WRITE64((u64)exp->ex_fsid);
2237 WRITE64((u64)0);
af6a4e28
N		 2238 break;
2239 case FSIDSOURCE_DEV:
1da177e4
LT		 2240 WRITE32(0);
2241 WRITE32(MAJOR(stat.dev));
2242 WRITE32(0);
2243 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2244 break;
2245 case FSIDSOURCE_UUID:
2246 WRITEMEM(exp->ex_uuid, 16);
2247 break;
1da177e4
LT		 2248 }
2249 }
2250 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2251 p = xdr_reserve_space(xdr, 4);
2252 if (!p)
1da177e4
LT		 2253 goto out_resource;
2254 WRITE32(0);
2255 }
2256 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2257 p = xdr_reserve_space(xdr, 4);
2258 if (!p)
1da177e4 2259 goto out_resource;
3d733711 2260 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2261 }
2262 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2263 p = xdr_reserve_space(xdr, 4);
2264 if (!p)
1da177e4 2265 goto out_resource;
42ca0993 2266 WRITE32(rdattr_err);
1da177e4
LT		 2267 }
2268 if (bmval0 & FATTR4_WORD0_ACL) {
2269 struct nfs4_ace *ace;
1da177e4
LT		 2270
2271 if (acl == NULL) {
ddd1ea56
BF		 2272 p = xdr_reserve_space(xdr, 4);
2273 if (!p)
1da177e4
LT		 2274 goto out_resource;
2275
2276 WRITE32(0);
2277 goto out_acl;
2278 }
ddd1ea56
BF		 2279 p = xdr_reserve_space(xdr, 4);
2280 if (!p)
1da177e4
LT		 2281 goto out_resource;
2282 WRITE32(acl->naces);
2283
28e05dd8 2284 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2285 p = xdr_reserve_space(xdr, 4*3);
2286 if (!p)
1da177e4
LT		 2287 goto out_resource;
2288 WRITE32(ace->type);
2289 WRITE32(ace->flag);
2290 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ddd1ea56 2291 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2292 if (status)
2293 goto out;
2294 }
2295 }
2296out_acl:
2297 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2298 p = xdr_reserve_space(xdr, 4);
2299 if (!p)
1da177e4
LT		 2300 goto out_resource;
2301 WRITE32(aclsupport ?
2302 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2303 }
2304 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2305 p = xdr_reserve_space(xdr, 4);
2306 if (!p)
1da177e4
LT		 2307 goto out_resource;
2308 WRITE32(1);
2309 }
2310 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2311 p = xdr_reserve_space(xdr, 4);
2312 if (!p)
1da177e4 2313 goto out_resource;
2930d381 2314 WRITE32(0);
1da177e4
LT		 2315 }
2316 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2317 p = xdr_reserve_space(xdr, 4);
2318 if (!p)
1da177e4
LT		 2319 goto out_resource;
2320 WRITE32(1);
2321 }
2322 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2323 p = xdr_reserve_space(xdr, 4);
2324 if (!p)
1da177e4
LT		 2325 goto out_resource;
2326 WRITE32(1);
2327 }
2328 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2329 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2330 if (!p)
1da177e4
LT		 2331 goto out_resource;
2332 WRITE32(fhp->fh_handle.fh_size);
2333 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2334 }
2335 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2336 p = xdr_reserve_space(xdr, 8);
2337 if (!p)
1da177e4 2338 goto out_resource;
40ee5dc6 2339 WRITE64(stat.ino);
1da177e4
LT		 2340 }
2341 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2342 p = xdr_reserve_space(xdr, 8);
2343 if (!p)
1da177e4
LT		 2344 goto out_resource;
2345 WRITE64((u64) statfs.f_ffree);
2346 }
2347 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2348 p = xdr_reserve_space(xdr, 8);
2349 if (!p)
1da177e4
LT		 2350 goto out_resource;
2351 WRITE64((u64) statfs.f_ffree);
2352 }
2353 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2354 p = xdr_reserve_space(xdr, 8);
2355 if (!p)
1da177e4
LT		 2356 goto out_resource;
2357 WRITE64((u64) statfs.f_files);
2358 }
81c3f413 2359 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2360 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2361 if (status)
2362 goto out;
2363 }
1da177e4 2364 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2365 p = xdr_reserve_space(xdr, 4);
2366 if (!p)
1da177e4
LT		 2367 goto out_resource;
2368 WRITE32(1);
2369 }
2370 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2371 p = xdr_reserve_space(xdr, 8);
2372 if (!p)
1da177e4 2373 goto out_resource;
aea240f4 2374 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2375 }
2376 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2377 p = xdr_reserve_space(xdr, 4);
2378 if (!p)
1da177e4
LT		 2379 goto out_resource;
2380 WRITE32(255);
2381 }
2382 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2383 p = xdr_reserve_space(xdr, 4);
2384 if (!p)
1da177e4 2385 goto out_resource;
a16e92ed 2386 WRITE32(statfs.f_namelen);
1da177e4
LT		 2387 }
2388 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2389 p = xdr_reserve_space(xdr, 8);
2390 if (!p)
1da177e4 2391 goto out_resource;
7adae489 2392 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2393 }
2394 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2395 p = xdr_reserve_space(xdr, 8);
2396 if (!p)
1da177e4 2397 goto out_resource;
7adae489 2398 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2399 }
2400 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2401 p = xdr_reserve_space(xdr, 4);
2402 if (!p)
1da177e4
LT		 2403 goto out_resource;
2404 WRITE32(stat.mode & S_IALLUGO);
2405 }
2406 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2407 p = xdr_reserve_space(xdr, 4);
2408 if (!p)
1da177e4
LT		 2409 goto out_resource;
2410 WRITE32(1);
2411 }
2412 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2413 p = xdr_reserve_space(xdr, 4);
2414 if (!p)
1da177e4
LT		 2415 goto out_resource;
2416 WRITE32(stat.nlink);
2417 }
2418 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2419 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2420 if (status)
2421 goto out;
2422 }
2423 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2424 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2425 if (status)
2426 goto out;
2427 }
2428 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2429 p = xdr_reserve_space(xdr, 8);
2430 if (!p)
1da177e4
LT		 2431 goto out_resource;
2432 WRITE32((u32) MAJOR(stat.rdev));
2433 WRITE32((u32) MINOR(stat.rdev));
2434 }
2435 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2436 p = xdr_reserve_space(xdr, 8);
2437 if (!p)
1da177e4
LT		 2438 goto out_resource;
2439 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2440 WRITE64(dummy64);
2441 }
2442 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2443 p = xdr_reserve_space(xdr, 8);
2444 if (!p)
1da177e4
LT		 2445 goto out_resource;
2446 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2447 WRITE64(dummy64);
2448 }
2449 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2450 p = xdr_reserve_space(xdr, 8);
2451 if (!p)
1da177e4
LT		 2452 goto out_resource;
2453 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2454 WRITE64(dummy64);
2455 }
2456 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2457 p = xdr_reserve_space(xdr, 8);
2458 if (!p)
1da177e4
LT		 2459 goto out_resource;
2460 dummy64 = (u64)stat.blocks << 9;
2461 WRITE64(dummy64);
2462 }
2463 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2464 p = xdr_reserve_space(xdr, 12);
2465 if (!p)
1da177e4 2466 goto out_resource;
bf8d9097 2467 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2468 WRITE32(stat.atime.tv_nsec);
2469 }
2470 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2471 p = xdr_reserve_space(xdr, 12);
2472 if (!p)
1da177e4
LT		 2473 goto out_resource;
2474 WRITE32(0);
2475 WRITE32(1);
2476 WRITE32(0);
2477 }
2478 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2479 p = xdr_reserve_space(xdr, 12);
2480 if (!p)
1da177e4 2481 goto out_resource;
bf8d9097 2482 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2483 WRITE32(stat.ctime.tv_nsec);
2484 }
2485 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2486 p = xdr_reserve_space(xdr, 12);
2487 if (!p)
1da177e4 2488 goto out_resource;
bf8d9097 2489 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2490 WRITE32(stat.mtime.tv_nsec);
2491 }
2492 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2493 p = xdr_reserve_space(xdr, 8);
2494 if (!p)
1da177e4 2495 goto out_resource;
406a7ea9
FF		 2496 /*
2497 * Get parent's attributes if not ignoring crossmount
2498 * and this is the root of a cross-mounted filesystem.
2499 */
2500 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2501 dentry == exp->ex_path.mnt->mnt_root)
2502 get_parent_attributes(exp, &stat);
40ee5dc6 2503 WRITE64(stat.ino);
1da177e4 2504 }
18032ca0 2505 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2506 status = nfsd4_encode_security_label(xdr, rqstp, context,
2507 contextlen);
18032ca0
DQ		 2508 if (status)
2509 goto out;
2510 }
8c18f205 2511 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2512 p = xdr_reserve_space(xdr, 16);
2513 if (!p)
de3997a7 2514 goto out_resource;
8c18f205
BH		 2515 WRITE32(3);
2516 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2517 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2518 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2519 }
7e705706 2520
082d4bd7
BF		 2521 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2522 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2523 status = nfs_ok;
2524
2525out:
ba4e55bb 2526#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2527 if (context)
2528 security_release_secctx(context, contextlen);
ba4e55bb 2529#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2530 kfree(acl);
18df11d0 2531 if (tempfh) {
d50e6136 2532 fh_put(tempfh);
18df11d0
YZ		 2533 kfree(tempfh);
2534 }
1fcea5b2
BF		 2535 if (status)
2536 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2537 return status;
2538out_nfserr:
b8dd7b9a 2539 status = nfserrno(err);
1da177e4
LT		 2540 goto out;
2541out_resource:
1da177e4
LT		 2542 status = nfserr_resource;
2543 goto out;
1da177e4
LT		 2544}
2545
2825a7f9
BF		 2546static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2547 struct xdr_buf *buf, __be32 *p, int bytes)
2548{
2549 xdr->scratch.iov_len = 0;
2550 memset(buf, 0, sizeof(struct xdr_buf));
2551 buf->head[0].iov_base = p;
2552 buf->head[0].iov_len = 0;
2553 buf->len = 0;
2554 xdr->buf = buf;
2555 xdr->iov = buf->head;
2556 xdr->p = p;
2557 xdr->end = (void *)p + bytes;
2558 buf->buflen = bytes;
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{
2825a7f9 2566 struct xdr_buf dummy;
d5184658
BF		 2567 struct xdr_stream xdr;
2568 __be32 ret;
2569
2825a7f9 2570 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2571 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2572 ignore_crossmnt);
2573 *p = xdr.p;
2574 return ret;
2575}
2576
c0ce6ec8
BF		 2577static inline int attributes_need_mount(u32 *bmval)
2578{
2579 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2580 return 1;
2581 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2582 return 1;
2583 return 0;
2584}
2585
b37ad28b 2586static __be32
561f0ed4
BF		 2587nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2588 const char *name, int namlen)
1da177e4
LT		 2589{
2590 struct svc_export *exp = cd->rd_fhp->fh_export;
2591 struct dentry *dentry;
b37ad28b 2592 __be32 nfserr;
406a7ea9 2593 int ignore_crossmnt = 0;
1da177e4
LT		 2594
2595 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2596 if (IS_ERR(dentry))
2597 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2598 if (!dentry->d_inode) {
2599 /*
2600 * nfsd_buffered_readdir drops the i_mutex between
2601 * readdir and calling this callback, leaving a window
2602 * where this directory entry could have gone away.
2603 */
2604 dput(dentry);
2605 return nfserr_noent;
2606 }
1da177e4
LT		 2607
2608 exp_get(exp);
406a7ea9
FF		 2609 /*
2610 * In the case of a mountpoint, the client may be asking for
2611 * attributes that are only properties of the underlying filesystem
2612 * as opposed to the cross-mounted file system. In such a case,
2613 * we will not follow the cross mount and will fill the attribtutes
2614 * directly from the mountpoint dentry.
2615 */
3227fa41 2616 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2617 int err;
2618
3227fa41
BF		 2619 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2620 && !attributes_need_mount(cd->rd_bmval)) {
2621 ignore_crossmnt = 1;
2622 goto out_encode;
2623 }
dcb488a3
AA		 2624 /*
2625 * Why the heck aren't we just using nfsd_lookup??
2626 * Different "."/".." handling? Something else?
2627 * At least, add a comment here to explain....
2628 */
021d3a72
BF		 2629 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2630 if (err) {
2631 nfserr = nfserrno(err);
1da177e4
LT		 2632 goto out_put;
2633 }
dcb488a3
AA		 2634 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2635 if (nfserr)
2636 goto out_put;
1da177e4
LT		 2637
2638 }
3227fa41 2639out_encode:
561f0ed4 2640 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2641 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2642out_put:
2643 dput(dentry);
2644 exp_put(exp);
2645 return nfserr;
2646}
2647
2ebbc012 2648static __be32 *
561f0ed4 2649nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2650{
561f0ed4
BF		 2651 __be32 *p;
2652
2653 p = xdr_reserve_space(xdr, 6);
2654 if (!p)
1da177e4
LT		 2655 return NULL;
2656 *p++ = htonl(2);
2657 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2658 *p++ = htonl(0); /* bmval1 */
2659
87915c64 2660 *p++ = htonl(4); /* attribute length */
1da177e4 2661 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2662 return p;
2663}
2664
2665static int
a0ad13ef
N		 2666nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2667 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2668{
a0ad13ef 2669 struct readdir_cd *ccd = ccdv;
1da177e4 2670 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2671 struct xdr_stream *xdr = cd->xdr;
2672 int start_offset = xdr->buf->len;
2673 int cookie_offset;
2674 int entry_bytes;
b37ad28b 2675 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2676 __be64 wire_offset;
2677 __be32 *p;
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
561f0ed4
BF		 2685 if (cd->cookie_offset) {
2686 wire_offset = cpu_to_be64(offset);
2687 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2688 &wire_offset, 8);
2689 }
1da177e4 2690
561f0ed4
BF		 2691 p = xdr_reserve_space(xdr, 4);
2692 if (!p)
1da177e4 2693 goto fail;
1da177e4 2694 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2695 cookie_offset = xdr->buf->len;
2696 p = xdr_reserve_space(xdr, 3*4 + namlen);
2697 if (!p)
2698 goto fail;
1da177e4
LT		 2699 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2700 p = xdr_encode_array(p, name, namlen); /* name length & name */
2701
561f0ed4 2702 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2703 switch (nfserr) {
2704 case nfs_ok:
1da177e4
LT		 2705 break;
2706 case nfserr_resource:
2707 nfserr = nfserr_toosmall;
2708 goto fail;
b2c0cea6
BF		 2709 case nfserr_noent:
2710 goto skip_entry;
1da177e4
LT		 2711 default:
2712 /*
2713 * If the client requested the RDATTR_ERROR attribute,
2714 * we stuff the error code into this attribute
2715 * and continue. If this attribute was not requested,
2716 * then in accordance with the spec, we fail the
2717 * entire READDIR operation(!)
2718 */
2719 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2720 goto fail;
561f0ed4 2721 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2722 if (p == NULL) {
2723 nfserr = nfserr_toosmall;
1da177e4 2724 goto fail;
34081efc 2725 }
1da177e4 2726 }
561f0ed4
BF		 2727 nfserr = nfserr_toosmall;
2728 entry_bytes = xdr->buf->len - start_offset;
2729 if (entry_bytes > cd->rd_maxcount)
2730 goto fail;
2731 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2732 if (!cd->rd_dircount)
2733 goto fail;
2734 cd->rd_dircount--;
561f0ed4 2735 cd->cookie_offset = cookie_offset;
b2c0cea6 2736skip_entry:
1da177e4
LT		 2737 cd->common.err = nfs_ok;
2738 return 0;
2739fail:
561f0ed4 2740 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2741 cd->common.err = nfserr;
2742 return -EINVAL;
2743}
2744
d0a381dd
BF		 2745static __be32
2746nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2747{
bc749ca4 2748 __be32 *p;
e2f282b9 2749
d0a381dd
BF		 2750 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2751 if (!p)
2752 return nfserr_resource;
e2f282b9
BH		 2753 WRITE32(sid->si_generation);
2754 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
d0a381dd 2755 return 0;
e2f282b9
BH		 2756}
2757
695e12f8 2758static __be32
b37ad28b 2759nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2760{
d0a381dd 2761 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2762 __be32 *p;
1da177e4
LT		 2763
2764 if (!nfserr) {
d0a381dd
BF		 2765 p = xdr_reserve_space(xdr, 8);
2766 if (!p)
2767 return nfserr_resource;
1da177e4
LT		 2768 WRITE32(access->ac_supported);
2769 WRITE32(access->ac_resp_access);
1da177e4 2770 }
695e12f8 2771 return nfserr;
1da177e4
LT		 2772}
2773
1d1bc8f2
BF		 2774static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2775{
d0a381dd 2776 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2777 __be32 *p;
2778
2779 if (!nfserr) {
d0a381dd
BF		 2780 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2781 if (!p)
2782 return nfserr_resource;
1d1bc8f2
BF		 2783 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2784 WRITE32(bcts->dir);
6e67b5d1 2785 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2 2786 WRITE32(0);
1d1bc8f2
BF		 2787 }
2788 return nfserr;
2789}
2790
695e12f8 2791static __be32
b37ad28b 2792nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2793{
d0a381dd
BF		 2794 struct xdr_stream *xdr = &resp->xdr;
2795
e2f282b9 2796 if (!nfserr)
d0a381dd 2797 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2798
695e12f8 2799 return nfserr;
1da177e4
LT		 2800}
2801
2802
695e12f8 2803static __be32
b37ad28b 2804nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2805{
d0a381dd 2806 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2807 __be32 *p;
1da177e4
LT		 2808
2809 if (!nfserr) {
d0a381dd
BF		 2810 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2811 if (!p)
2812 return nfserr_resource;
ab4684d1 2813 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 2814 }
695e12f8 2815 return nfserr;
1da177e4
LT		 2816}
2817
695e12f8 2818static __be32
b37ad28b 2819nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2820{
d0a381dd 2821 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2822 __be32 *p;
1da177e4
LT		 2823
2824 if (!nfserr) {
d0a381dd
BF		 2825 p = xdr_reserve_space(xdr, 32);
2826 if (!p)
2827 return nfserr_resource;
c654b8a9 2828 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2829 WRITE32(2);
2830 WRITE32(create->cr_bmval[0]);
2831 WRITE32(create->cr_bmval[1]);
1da177e4 2832 }
695e12f8 2833 return nfserr;
1da177e4
LT		 2834}
2835
b37ad28b
AV		 2836static __be32
2837nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2838{
2839 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2840 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2841
2842 if (nfserr)
2843 return nfserr;
2844
d5184658
BF		 2845 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2846 getattr->ga_bmval,
406a7ea9 2847 resp->rqstp, 0);
1da177e4
LT		 2848 return nfserr;
2849}
2850
695e12f8
BH		 2851static __be32
2852nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2853{
d0a381dd 2854 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2855 struct svc_fh *fhp = *fhpp;
1da177e4 2856 unsigned int len;
bc749ca4 2857 __be32 *p;
1da177e4
LT		 2858
2859 if (!nfserr) {
2860 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2861 p = xdr_reserve_space(xdr, len + 4);
2862 if (!p)
2863 return nfserr_resource;
1da177e4
LT		 2864 WRITE32(len);
2865 WRITEMEM(&fhp->fh_handle.fh_base, len);
1da177e4 2866 }
695e12f8 2867 return nfserr;
1da177e4
LT		 2868}
2869
2870/*
2871* Including all fields other than the name, a LOCK4denied structure requires
2872* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2873*/
d0a381dd
BF		 2874static __be32
2875nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2876{
7c13f344 2877 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2878 __be32 *p;
1da177e4 2879
8c7424cf 2880again:
d0a381dd 2881 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2882 if (!p) {
2883 /*
2884 * Don't fail to return the result just because we can't
2885 * return the conflicting open:
2886 */
2887 if (conf->len) {
2888 conf->len = 0;
2889 conf->data = NULL;
2890 goto again;
2891 }
d0a381dd 2892 return nfserr_resource;
8c7424cf 2893 }
1da177e4
LT		 2894 WRITE64(ld->ld_start);
2895 WRITE64(ld->ld_length);
2896 WRITE32(ld->ld_type);
7c13f344 2897 if (conf->len) {
1da177e4 2898 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2899 WRITE32(conf->len);
2900 WRITEMEM(conf->data, conf->len);
1da177e4
LT		 2901 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2902 WRITE64((u64)0); /* clientid */
2903 WRITE32(0); /* length of owner name */
2904 }
d0a381dd 2905 return nfserr_denied;
1da177e4
LT		 2906}
2907
695e12f8 2908static __be32
b37ad28b 2909nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2910{
d0a381dd
BF		 2911 struct xdr_stream *xdr = &resp->xdr;
2912
e2f282b9 2913 if (!nfserr)
d0a381dd 2914 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2915 else if (nfserr == nfserr_denied)
d0a381dd 2916 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2917 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2918 return nfserr;
1da177e4
LT		 2919}
2920
695e12f8 2921static __be32
b37ad28b 2922nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2923{
d0a381dd
BF		 2924 struct xdr_stream *xdr = &resp->xdr;
2925
1da177e4 2926 if (nfserr == nfserr_denied)
d0a381dd 2927 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2928 return nfserr;
1da177e4
LT		 2929}
2930
695e12f8 2931static __be32
b37ad28b 2932nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2933{
d0a381dd
BF		 2934 struct xdr_stream *xdr = &resp->xdr;
2935
e2f282b9 2936 if (!nfserr)
d0a381dd 2937 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2938
695e12f8 2939 return nfserr;
1da177e4
LT		 2940}
2941
2942
695e12f8 2943static __be32
b37ad28b 2944nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2945{
d0a381dd 2946 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2947 __be32 *p;
1da177e4
LT		 2948
2949 if (!nfserr) {
d0a381dd
BF		 2950 p = xdr_reserve_space(xdr, 20);
2951 if (!p)
2952 return nfserr_resource;
c654b8a9 2953 write_cinfo(&p, &link->li_cinfo);
1da177e4 2954 }
695e12f8 2955 return nfserr;
1da177e4
LT		 2956}
2957
2958
695e12f8 2959static __be32
b37ad28b 2960nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2961{
d0a381dd 2962 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2963 __be32 *p;
1da177e4
LT		 2964
2965 if (nfserr)
2966 goto out;
2967
d0a381dd
BF		 2968 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2969 if (nfserr)
2970 goto out;
2971 p = xdr_reserve_space(xdr, 40);
2972 if (!p)
2973 return nfserr_resource;
c654b8a9 2974 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2975 WRITE32(open->op_rflags);
2976 WRITE32(2);
2977 WRITE32(open->op_bmval[0]);
2978 WRITE32(open->op_bmval[1]);
2979 WRITE32(open->op_delegate_type);
1da177e4
LT		 2980
2981 switch (open->op_delegate_type) {
2982 case NFS4_OPEN_DELEGATE_NONE:
2983 break;
2984 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2985 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2986 if (nfserr)
2987 return nfserr;
2988 p = xdr_reserve_space(xdr, 20);
2989 if (!p)
2990 return nfserr_resource;
7b190fec 2991 WRITE32(open->op_recall);
1da177e4
LT		 2992
2993 /*
2994 * TODO: ACE's in delegations
2995 */
2996 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2997 WRITE32(0);
2998 WRITE32(0);
2999 WRITE32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3000 break;
3001 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3002 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3003 if (nfserr)
3004 return nfserr;
3005 p = xdr_reserve_space(xdr, 32);
3006 if (!p)
3007 return nfserr_resource;
1da177e4
LT		 3008 WRITE32(0);
3009
3010 /*
3011 * TODO: space_limit's in delegations
3012 */
3013 WRITE32(NFS4_LIMIT_SIZE);
3014 WRITE32(~(u32)0);
3015 WRITE32(~(u32)0);
3016
3017 /*
3018 * TODO: ACE's in delegations
3019 */
3020 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3021 WRITE32(0);
3022 WRITE32(0);
3023 WRITE32(0); /* XXX: is NULL principal ok? */
1da177e4 3024 break;
d24433cd
BH		 3025 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3026 switch (open->op_why_no_deleg) {
3027 case WND4_CONTENTION:
3028 case WND4_RESOURCE:
d0a381dd
BF		 3029 p = xdr_reserve_space(xdr, 8);
3030 if (!p)
3031 return nfserr_resource;
d24433cd
BH		 3032 WRITE32(open->op_why_no_deleg);
3033 WRITE32(0); /* deleg signaling not supported yet */
3034 break;
3035 default:
d0a381dd
BF		 3036 p = xdr_reserve_space(xdr, 4);
3037 if (!p)
3038 return nfserr_resource;
d24433cd
BH		 3039 WRITE32(open->op_why_no_deleg);
3040 }
d24433cd 3041 break;
1da177e4
LT		 3042 default:
3043 BUG();
3044 }
3045 /* XXX save filehandle here */
3046out:
695e12f8 3047 return nfserr;
1da177e4
LT		 3048}
3049
695e12f8 3050static __be32
b37ad28b 3051nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3052{
d0a381dd
BF		 3053 struct xdr_stream *xdr = &resp->xdr;
3054
e2f282b9 3055 if (!nfserr)
d0a381dd 3056 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3057
695e12f8 3058 return nfserr;
1da177e4
LT		 3059}
3060
695e12f8 3061static __be32
b37ad28b 3062nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3063{
d0a381dd
BF		 3064 struct xdr_stream *xdr = &resp->xdr;
3065
e2f282b9 3066 if (!nfserr)
d0a381dd 3067 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3068
695e12f8 3069 return nfserr;
1da177e4
LT		 3070}
3071
dc97618d
BF		 3072static __be32 nfsd4_encode_splice_read(
3073 struct nfsd4_compoundres *resp,
3074 struct nfsd4_read *read,
3075 struct file *file, unsigned long maxcount)
1da177e4 3076{
ddd1ea56 3077 struct xdr_stream *xdr = &resp->xdr;
dc97618d
BF		 3078 u32 eof;
3079 int starting_len = xdr->buf->len - 8;
30596768 3080 int space_left;
dc97618d
BF		 3081 __be32 nfserr;
3082 __be32 tmp;
bc749ca4 3083 __be32 *p;
1da177e4 3084
dc97618d
BF		 3085 /*
3086 * Don't inline pages unless we know there's room for eof,
3087 * count, and possible padding:
3088 */
3089 if (xdr->end - xdr->p < 3)
d0a381dd 3090 return nfserr_resource;
dc97618d
BF		 3091
3092 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3093 read->rd_offset, &maxcount);
3094 if (nfserr) {
3095 /*
3096 * nfsd_splice_actor may have already messed with the
3097 * page length; reset it so as not to confuse
3098 * xdr_truncate_encode:
3099 */
3100 xdr->buf->page_len = 0;
3101 return nfserr;
b0e35fda 3102 }
1da177e4 3103
dc97618d
BF		 3104 eof = (read->rd_offset + maxcount >=
3105 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3106
dc97618d
BF		 3107 tmp = htonl(eof);
3108 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3109 tmp = htonl(maxcount);
3110 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3111
3112 resp->xdr.buf->page_len = maxcount;
3113 xdr->buf->len += maxcount;
3114 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
3115 xdr->iov = xdr->buf->tail;
3116
3117 /* Use rest of head for padding and remaining ops: */
3118 resp->xdr.buf->tail[0].iov_base = xdr->p;
3119 resp->xdr.buf->tail[0].iov_len = 0;
3120 if (maxcount&3) {
3121 p = xdr_reserve_space(xdr, 4);
3122 WRITE32(0);
3123 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3124 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
3125 xdr->buf->len -= (maxcount&3);
b0e35fda 3126 }
2825a7f9 3127
dc97618d
BF		 3128 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3129 xdr->buf->buflen - xdr->buf->len);
3130 xdr->buf->buflen = xdr->buf->len + space_left;
3131 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3132
3133 return 0;
3134}
3135
3136static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3137 struct nfsd4_read *read,
3138 struct file *file, unsigned long maxcount)
3139{
3140 struct xdr_stream *xdr = &resp->xdr;
3141 u32 eof;
3142 int v;
3143 struct page *page;
3144 int starting_len = xdr->buf->len - 8;
3145 int space_left;
3146 long len;
3147 __be32 nfserr;
3148 __be32 tmp;
3149 __be32 *p;
1da177e4
LT		 3150
3151 len = maxcount;
3152 v = 0;
6ff9897d
BF		 3153 while (len) {
3154 int thislen;
3155
afc59400
BF		 3156 page = *(resp->rqstp->rq_next_page);
3157 if (!page) { /* ran out of pages */
d5f50b0c
BF		 3158 maxcount -= len;
3159 break;
3160 }
6ff9897d 3161 thislen = min_t(long, len, PAGE_SIZE);
afc59400 3162 resp->rqstp->rq_vec[v].iov_base = page_address(page);
6ff9897d 3163 resp->rqstp->rq_vec[v].iov_len = thislen;
afc59400 3164 resp->rqstp->rq_next_page++;
1da177e4 3165 v++;
6ff9897d 3166 len -= thislen;
1da177e4
LT		 3167 }
3168 read->rd_vlen = v;
3169
dc97618d
BF		 3170 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3171 read->rd_vlen, &maxcount);
3172 if (nfserr)
1da177e4 3173 return nfserr;
dc97618d 3174
44524359
N		 3175 eof = (read->rd_offset + maxcount >=
3176 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3177
dc97618d
BF		 3178 tmp = htonl(eof);
3179 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3180 tmp = htonl(maxcount);
3181 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3182
4aea24b2 3183 resp->xdr.buf->page_len = maxcount;
6ac90391 3184 xdr->buf->len += maxcount;
2825a7f9 3185 xdr->page_ptr += v;
ddd1ea56 3186 xdr->iov = xdr->buf->tail;
1da177e4 3187
6ed6decc 3188 /* Use rest of head for padding and remaining ops: */
dc97618d 3189 resp->xdr.buf->tail[0].iov_base = xdr->p;
4aea24b2 3190 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3191 if (maxcount&3) {
d0a381dd 3192 p = xdr_reserve_space(xdr, 4);
6ed6decc 3193 WRITE32(0);
4aea24b2
BF		 3194 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3195 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
6ac90391 3196 xdr->buf->len -= (maxcount&3);
1da177e4 3197 }
30596768
BF		 3198
3199 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3200 xdr->buf->buflen - xdr->buf->len);
3201 xdr->buf->buflen = xdr->buf->len + space_left;
3202 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3203
1da177e4 3204 return 0;
dc97618d
BF		 3205
3206}
3207
3208static __be32
3209nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3210 struct nfsd4_read *read)
3211{
3212 unsigned long maxcount;
3213 struct xdr_stream *xdr = &resp->xdr;
3214 struct file *file = read->rd_filp;
3215 int starting_len = xdr->buf->len;
3216 struct raparms *ra;
3217 __be32 *p;
3218 __be32 err;
3219
3220 if (nfserr)
3221 return nfserr;
3222
3223 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3224 if (!p) {
3225 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3226 return nfserr_resource;
3227 }
3228
3229 if (resp->xdr.buf->page_len) {
3230 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3231 return nfserr_resource;
3232 }
3233
3234 xdr_commit_encode(xdr);
3235
3236 maxcount = svc_max_payload(resp->rqstp);
3237 if (maxcount > read->rd_length)
3238 maxcount = read->rd_length;
3239
3240 if (!read->rd_filp) {
3241 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3242 &file, &ra);
3243 if (err)
3244 goto err_truncate;
3245 }
3246
3247 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3248 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3249 else
3250 err = nfsd4_encode_readv(resp, read, file, maxcount);
3251
3252 if (!read->rd_filp)
3253 nfsd_put_tmp_read_open(file, ra);
3254
3255err_truncate:
3256 if (err)
3257 xdr_truncate_encode(xdr, starting_len);
3258 return err;
1da177e4
LT		 3259}
3260
b37ad28b
AV		 3261static __be32
3262nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3263{
3264 int maxcount;
476a7b1f
BF		 3265 __be32 wire_count;
3266 int zero = 0;
ddd1ea56 3267 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3268 int length_offset = xdr->buf->len;
bc749ca4 3269 __be32 *p;
1da177e4
LT		 3270
3271 if (nfserr)
3272 return nfserr;
2825a7f9
BF		 3273
3274 p = xdr_reserve_space(xdr, 4);
3275 if (!p)
3276 return nfserr_resource;
1da177e4 3277 maxcount = PAGE_SIZE;
d0a381dd 3278
476a7b1f
BF		 3279 p = xdr_reserve_space(xdr, maxcount);
3280 if (!p)
4e21ac4b 3281 return nfserr_resource;
1da177e4
LT		 3282 /*
3283 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3284 * if they would overflow the buffer. Is this kosher in NFSv4? If
3285 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3286 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3287 */
476a7b1f
BF		 3288 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3289 (char *)p, &maxcount);
1da177e4 3290 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3291 nfserr = nfserr_inval;
3292 if (nfserr) {
1fcea5b2 3293 xdr_truncate_encode(xdr, length_offset);
1da177e4 3294 return nfserr;
d3f627c8 3295 }
1da177e4 3296
476a7b1f
BF		 3297 wire_count = htonl(maxcount);
3298 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3299 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3300 if (maxcount & 3)
3301 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3302 &zero, 4 - (maxcount&3));
1da177e4
LT		 3303 return 0;
3304}
3305
b37ad28b
AV		 3306static __be32
3307nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3308{
3309 int maxcount;
561f0ed4 3310 int bytes_left;
1da177e4 3311 loff_t offset;
561f0ed4 3312 __be64 wire_offset;
ddd1ea56 3313 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3314 int starting_len = xdr->buf->len;
bc749ca4 3315 __be32 *p;
1da177e4
LT		 3316
3317 if (nfserr)
3318 return nfserr;
1da177e4 3319
d0a381dd
BF		 3320 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3321 if (!p)
3322 return nfserr_resource;
1da177e4
LT		 3323
3324 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3325 WRITE32(0);
3326 WRITE32(0);
4aea24b2
BF		 3327 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3328 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3329
3330 /*
561f0ed4
BF		 3331 * Number of bytes left for directory entries allowing for the
3332 * final 8 bytes of the readdir and a following failed op:
3333 */
3334 bytes_left = xdr->buf->buflen - xdr->buf->len
3335 - COMPOUND_ERR_SLACK_SPACE - 8;
3336 if (bytes_left < 0) {
3337 nfserr = nfserr_resource;
3338 goto err_no_verf;
3339 }
3340 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3341 /*
3342 * Note the rfc defines rd_maxcount as the size of the
3343 * READDIR4resok structure, which includes the verifier above
3344 * and the 8 bytes encoded at the end of this function:
1da177e4 3345 */
561f0ed4
BF		 3346 if (maxcount < 16) {
3347 nfserr = nfserr_toosmall;
1da177e4
LT		 3348 goto err_no_verf;
3349 }
561f0ed4 3350 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3351
561f0ed4
BF		 3352 readdir->xdr = xdr;
3353 readdir->rd_maxcount = maxcount;
1da177e4 3354 readdir->common.err = 0;
561f0ed4 3355 readdir->cookie_offset = 0;
1da177e4
LT		 3356
3357 offset = readdir->rd_cookie;
3358 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3359 &offset,
3360 &readdir->common, nfsd4_encode_dirent);
3361 if (nfserr == nfs_ok &&
3362 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3363 xdr->buf->len == starting_len + 8) {
3364 /* nothing encoded; which limit did we hit?: */
3365 if (maxcount - 16 < bytes_left)
3366 /* It was the fault of rd_maxcount: */
3367 nfserr = nfserr_toosmall;
3368 else
3369 /* We ran out of buffer space: */
3370 nfserr = nfserr_resource;
3371 }
1da177e4
LT		 3372 if (nfserr)
3373 goto err_no_verf;
3374
561f0ed4
BF		 3375 if (readdir->cookie_offset) {
3376 wire_offset = cpu_to_be64(offset);
3377 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3378 &wire_offset, 8);
3379 }
1da177e4 3380
561f0ed4
BF		 3381 p = xdr_reserve_space(xdr, 8);
3382 if (!p) {
3383 WARN_ON_ONCE(1);
3384 goto err_no_verf;
3385 }
1da177e4
LT		 3386 *p++ = 0; /* no more entries */
3387 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3388
3389 return 0;
3390err_no_verf:
1fcea5b2 3391 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3392 return nfserr;
3393}
3394
695e12f8 3395static __be32
b37ad28b 3396nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3397{
d0a381dd 3398 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3399 __be32 *p;
1da177e4
LT		 3400
3401 if (!nfserr) {
d0a381dd
BF		 3402 p = xdr_reserve_space(xdr, 20);
3403 if (!p)
3404 return nfserr_resource;
c654b8a9 3405 write_cinfo(&p, &remove->rm_cinfo);
1da177e4 3406 }
695e12f8 3407 return nfserr;
1da177e4
LT		 3408}
3409
695e12f8 3410static __be32
b37ad28b 3411nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3412{
d0a381dd 3413 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3414 __be32 *p;
1da177e4
LT		 3415
3416 if (!nfserr) {
d0a381dd
BF		 3417 p = xdr_reserve_space(xdr, 40);
3418 if (!p)
3419 return nfserr_resource;
c654b8a9
BF		 3420 write_cinfo(&p, &rename->rn_sinfo);
3421 write_cinfo(&p, &rename->rn_tinfo);
1da177e4 3422 }
695e12f8 3423 return nfserr;
1da177e4
LT		 3424}
3425
695e12f8 3426static __be32
d0a381dd 3427nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3428 __be32 nfserr, struct svc_export *exp)
dcb488a3 3429{
676e4ebd 3430 u32 i, nflavs, supported;
4796f457
BF		 3431 struct exp_flavor_info *flavs;
3432 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3433 __be32 *p, *flavorsp;
3434 static bool report = true;
dcb488a3
AA		 3435
3436 if (nfserr)
3437 goto out;
d0a381dd 3438 nfserr = nfserr_resource;
4796f457
BF		 3439 if (exp->ex_nflavors) {
3440 flavs = exp->ex_flavors;
3441 nflavs = exp->ex_nflavors;
3442 } else { /* Handling of some defaults in absence of real secinfo: */
3443 flavs = def_flavs;
3444 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3445 nflavs = 2;
3446 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3447 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3448 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3449 nflavs = 1;
3450 flavs[0].pseudoflavor
3451 = svcauth_gss_flavor(exp->ex_client);
3452 } else {
3453 nflavs = 1;
3454 flavs[0].pseudoflavor
3455 = exp->ex_client->flavour->flavour;
3456 }
3457 }
3458
676e4ebd 3459 supported = 0;
d0a381dd
BF		 3460 p = xdr_reserve_space(xdr, 4);
3461 if (!p)
3462 goto out;
676e4ebd 3463 flavorsp = p++; /* to be backfilled later */
676e4ebd 3464
4796f457 3465 for (i = 0; i < nflavs; i++) {
676e4ebd 3466 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3467 struct rpcsec_gss_info info;
dcb488a3 3468
676e4ebd
CL		 3469 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3470 supported++;
d0a381dd
BF		 3471 p = xdr_reserve_space(xdr, 4 + 4 +
3472 XDR_LEN(info.oid.len) + 4 + 4);
3473 if (!p)
3474 goto out;
dcb488a3 3475 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3476 WRITE32(info.oid.len);
3477 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3478 WRITE32(info.qop);
a77c806f 3479 WRITE32(info.service);
676e4ebd
CL		 3480 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3481 supported++;
d0a381dd
BF		 3482 p = xdr_reserve_space(xdr, 4);
3483 if (!p)
3484 goto out;
676e4ebd 3485 WRITE32(pf);
676e4ebd
CL		 3486 } else {
3487 if (report)
3488 pr_warn("NFS: SECINFO: security flavor %u "
3489 "is not supported\n", pf);
dcb488a3
AA		 3490 }
3491 }
a77c806f 3492
676e4ebd
CL		 3493 if (nflavs != supported)
3494 report = false;
3495 *flavorsp = htonl(supported);
d0a381dd 3496 nfserr = 0;
dcb488a3
AA		 3497out:
3498 if (exp)
3499 exp_put(exp);
695e12f8 3500 return nfserr;
dcb488a3
AA		 3501}
3502
22b6dee8
MJ		 3503static __be32
3504nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3505 struct nfsd4_secinfo *secinfo)
3506{
d0a381dd
BF		 3507 struct xdr_stream *xdr = &resp->xdr;
3508
3509 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3510}
3511
3512static __be32
3513nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3514 struct nfsd4_secinfo_no_name *secinfo)
3515{
d0a381dd
BF		 3516 struct xdr_stream *xdr = &resp->xdr;
3517
3518 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3519}
3520
1da177e4
LT		 3521/*
3522 * The SETATTR encode routine is special -- it always encodes a bitmap,
3523 * regardless of the error status.
3524 */
695e12f8 3525static __be32
b37ad28b 3526nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3527{
d0a381dd 3528 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3529 __be32 *p;
1da177e4 3530
d0a381dd
BF		 3531 p = xdr_reserve_space(xdr, 16);
3532 if (!p)
3533 return nfserr_resource;
1da177e4 3534 if (nfserr) {
18032ca0
DQ		 3535 WRITE32(3);
3536 WRITE32(0);
1da177e4
LT		 3537 WRITE32(0);
3538 WRITE32(0);
3539 }
3540 else {
18032ca0 3541 WRITE32(3);
1da177e4
LT		 3542 WRITE32(setattr->sa_bmval[0]);
3543 WRITE32(setattr->sa_bmval[1]);
18032ca0 3544 WRITE32(setattr->sa_bmval[2]);
1da177e4 3545 }
695e12f8 3546 return nfserr;
1da177e4
LT		 3547}
3548
695e12f8 3549static __be32
b37ad28b 3550nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3551{
d0a381dd 3552 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3553 __be32 *p;
1da177e4
LT		 3554
3555 if (!nfserr) {
d0a381dd
BF		 3556 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3557 if (!p)
3558 return nfserr_resource;
1da177e4 3559 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3560 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3561 }
3562 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3563 p = xdr_reserve_space(xdr, 8);
3564 if (!p)
3565 return nfserr_resource;
1da177e4
LT		 3566 WRITE32(0);
3567 WRITE32(0);
1da177e4 3568 }
695e12f8 3569 return nfserr;
1da177e4
LT		 3570}
3571
695e12f8 3572static __be32
b37ad28b 3573nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3574{
d0a381dd 3575 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3576 __be32 *p;
1da177e4
LT		 3577
3578 if (!nfserr) {
d0a381dd
BF		 3579 p = xdr_reserve_space(xdr, 16);
3580 if (!p)
3581 return nfserr_resource;
1da177e4
LT		 3582 WRITE32(write->wr_bytes_written);
3583 WRITE32(write->wr_how_written);
ab4684d1 3584 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4 3585 }
695e12f8 3586 return nfserr;
1da177e4
LT		 3587}
3588
57266a6e
BF		 3589static const u32 nfs4_minimal_spo_must_enforce[2] = {
3590 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3591 1 << (OP_EXCHANGE_ID - 32) |
3592 1 << (OP_CREATE_SESSION - 32) |
3593 1 << (OP_DESTROY_SESSION - 32) |
3594 1 << (OP_DESTROY_CLIENTID - 32)
3595};
3596
2db134eb 3597static __be32
57b7b43b 3598nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3599 struct nfsd4_exchange_id *exid)
3600{
d0a381dd 3601 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3602 __be32 *p;
0733d213
AA		 3603 char *major_id;
3604 char *server_scope;
3605 int major_id_sz;
3606 int server_scope_sz;
3607 uint64_t minor_id = 0;
3608
3609 if (nfserr)
3610 return nfserr;
3611
3612 major_id = utsname()->nodename;
3613 major_id_sz = strlen(major_id);
3614 server_scope = utsname()->nodename;
3615 server_scope_sz = strlen(server_scope);
3616
d0a381dd 3617 p = xdr_reserve_space(xdr,
0733d213
AA		 3618 8 /* eir_clientid */ +
3619 4 /* eir_sequenceid */ +
3620 4 /* eir_flags */ +
a8bb84bc 3621 4 /* spr_how */);
d0a381dd
BF		 3622 if (!p)
3623 return nfserr_resource;
0733d213
AA		 3624
3625 WRITEMEM(&exid->clientid, 8);
3626 WRITE32(exid->seqid);
3627 WRITE32(exid->flags);
3628
0733d213 3629 WRITE32(exid->spa_how);
a8bb84bc 3630
57266a6e
BF		 3631 switch (exid->spa_how) {
3632 case SP4_NONE:
3633 break;
3634 case SP4_MACH_CRED:
a8bb84bc 3635 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3636 p = xdr_reserve_space(xdr, 16);
3637 if (!p)
3638 return nfserr_resource;
a8bb84bc 3639
57266a6e
BF		 3640 /* spo_must_enforce bitmap: */
3641 WRITE32(2);
3642 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3643 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3644 /* empty spo_must_allow bitmap: */
3645 WRITE32(0);
a8bb84bc 3646
57266a6e
BF		 3647 break;
3648 default:
3649 WARN_ON_ONCE(1);
3650 }
0733d213 3651
d0a381dd 3652 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3653 8 /* so_minor_id */ +
3654 4 /* so_major_id.len */ +
3655 (XDR_QUADLEN(major_id_sz) * 4) +
3656 4 /* eir_server_scope.len */ +
3657 (XDR_QUADLEN(server_scope_sz) * 4) +
3658 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3659 if (!p)
3660 return nfserr_resource;
a8bb84bc 3661
0733d213
AA		 3662 /* The server_owner struct */
3663 WRITE64(minor_id); /* Minor id */
3664 /* major id */
3665 WRITE32(major_id_sz);
3666 WRITEMEM(major_id, major_id_sz);
3667
3668 /* Server scope */
3669 WRITE32(server_scope_sz);
3670 WRITEMEM(server_scope, server_scope_sz);
3671
3672 /* Implementation id */
3673 WRITE32(0); /* zero length nfs_impl_id4 array */
0733d213 3674 return 0;
2db134eb
AA		 3675}
3676
3677static __be32
57b7b43b 3678nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3679 struct nfsd4_create_session *sess)
3680{
d0a381dd 3681 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3682 __be32 *p;
ec6b5d7b
AA		 3683
3684 if (nfserr)
3685 return nfserr;
3686
d0a381dd
BF		 3687 p = xdr_reserve_space(xdr, 24);
3688 if (!p)
3689 return nfserr_resource;
ec6b5d7b
AA		 3690 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3691 WRITE32(sess->seqid);
3692 WRITE32(sess->flags);
ec6b5d7b 3693
d0a381dd
BF		 3694 p = xdr_reserve_space(xdr, 28);
3695 if (!p)
3696 return nfserr_resource;
ec6b5d7b
AA		 3697 WRITE32(0); /* headerpadsz */
3698 WRITE32(sess->fore_channel.maxreq_sz);
3699 WRITE32(sess->fore_channel.maxresp_sz);
3700 WRITE32(sess->fore_channel.maxresp_cached);
3701 WRITE32(sess->fore_channel.maxops);
3702 WRITE32(sess->fore_channel.maxreqs);
3703 WRITE32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3704
3705 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3706 p = xdr_reserve_space(xdr, 4);
3707 if (!p)
3708 return nfserr_resource;
ec6b5d7b 3709 WRITE32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3710 }
3711
d0a381dd
BF		 3712 p = xdr_reserve_space(xdr, 28);
3713 if (!p)
3714 return nfserr_resource;
ec6b5d7b
AA		 3715 WRITE32(0); /* headerpadsz */
3716 WRITE32(sess->back_channel.maxreq_sz);
3717 WRITE32(sess->back_channel.maxresp_sz);
3718 WRITE32(sess->back_channel.maxresp_cached);
3719 WRITE32(sess->back_channel.maxops);
3720 WRITE32(sess->back_channel.maxreqs);
3721 WRITE32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3722
3723 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3724 p = xdr_reserve_space(xdr, 4);
3725 if (!p)
3726 return nfserr_resource;
ec6b5d7b 3727 WRITE32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3728 }
3729 return 0;
2db134eb
AA		 3730}
3731
c47d832b 3732static __be32
57b7b43b 3733nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3734 struct nfsd4_sequence *seq)
3735{
d0a381dd 3736 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3737 __be32 *p;
b85d4c01
BH		 3738
3739 if (nfserr)
3740 return nfserr;
3741
d0a381dd
BF		 3742 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3743 if (!p)
3744 return nfserr_resource;
b85d4c01
BH		 3745 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3746 WRITE32(seq->seqid);
3747 WRITE32(seq->slotid);
b7d7ca35
BF		 3748 /* Note slotid's are numbered from zero: */
3749 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3750 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3751 WRITE32(seq->status_flags);
b85d4c01 3752
f5236013 3753 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3754 return 0;
2db134eb
AA		 3755}
3756
2355c596 3757static __be32
57b7b43b 3758nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3759 struct nfsd4_test_stateid *test_stateid)
3760{
d0a381dd 3761 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3762 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3763 __be32 *p;
17456804 3764
a11fcce1
BF		 3765 if (nfserr)
3766 return nfserr;
3767
d0a381dd
BF		 3768 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3769 if (!p)
3770 return nfserr_resource;
17456804 3771 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3772
03cfb420 3773 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3774 *p++ = stateid->ts_id_status;
17456804 3775 }
17456804
BS		 3776
3777 return nfserr;
3778}
3779
695e12f8
BH		 3780static __be32
3781nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3782{
3783 return nfserr;
3784}
3785
3786typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3787
2db134eb
AA		 3788/*
3789 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3790 * since we don't need to filter out obsolete ops as this is
3791 * done in the decoding phase.
3792 */
695e12f8 3793static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3794 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3795 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3796 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3797 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3798 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3799 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3800 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3801 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3802 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3803 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3804 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3805 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3806 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3807 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3808 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3809 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3810 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3811 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3812 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3813 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3817 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3818 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3819 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3820 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3821 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3822 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3823 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3824 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3825 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3826 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3827 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3828 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3829 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3830 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3831
3832 /* NFSv4.1 operations */
3833 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3834 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3835 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3836 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3837 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3838 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3839 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3840 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3841 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3842 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3843 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3844 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3845 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3846 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3847 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3848 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3849 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3850 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3851 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3852};
3853
496c262c 3854/*
a8095f7e
BF		 3855 * Calculate whether we still have space to encode repsize bytes.
3856 * There are two considerations:
3857 * - For NFS versions >=4.1, the size of the reply must stay within
3858 * session limits
3859 * - For all NFS versions, we must stay within limited preallocated
3860 * buffer space.
496c262c 3861 *
a8095f7e
BF		 3862 * This is called before the operation is processed, so can only provide
3863 * an upper estimate. For some nonidempotent operations (such as
3864 * getattr), it's not necessarily a problem if that estimate is wrong,
3865 * as we can fail it after processing without significant side effects.
496c262c 3866 */
a8095f7e 3867__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3868{
67492c99 3869 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3870 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3871
47ee5298
BF		 3872 if (buf->len + respsize <= buf->buflen)
3873 return nfs_ok;
3874 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3875 return nfserr_resource;
47ee5298
BF		 3876 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3877 WARN_ON_ONCE(1);
3878 return nfserr_rep_too_big_to_cache;
ea8d7720 3879 }
47ee5298 3880 return nfserr_rep_too_big;
496c262c
AA		 3881}
3882
1da177e4
LT		 3883void
3884nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3885{
082d4bd7 3886 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3887 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3888 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3889 int post_err_offset;
07d1f802 3890 nfsd4_enc encoder;
bc749ca4 3891 __be32 *p;
1da177e4 3892
d0a381dd
BF		 3893 p = xdr_reserve_space(xdr, 8);
3894 if (!p) {
3895 WARN_ON_ONCE(1);
3896 return;
3897 }
1da177e4 3898 WRITE32(op->opnum);
082d4bd7 3899 post_err_offset = xdr->buf->len;
1da177e4 3900
695e12f8
BH		 3901 if (op->opnum == OP_ILLEGAL)
3902 goto status;
3903 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3904 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3905 encoder = nfsd4_enc_ops[op->opnum];
3906 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3907 xdr_commit_encode(xdr);
3908
067e1ace 3909 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3910 if (!op->status) {
3911 int space_needed = 0;
3912 if (!nfsd4_last_compound_op(rqstp))
3913 space_needed = COMPOUND_ERR_SLACK_SPACE;
3914 op->status = nfsd4_check_resp_size(resp, space_needed);
3915 }
07d1f802
BF		 3916 if (op->status == nfserr_resource ||
3917 op->status == nfserr_rep_too_big ||
3918 op->status == nfserr_rep_too_big_to_cache) {
3919 /*
3920 * The operation may have already been encoded or
3921 * partially encoded. No op returns anything additional
3922 * in the case of one of these three errors, so we can
3923 * just truncate back to after the status. But it's a
3924 * bug if we had to do this on a non-idempotent op:
3925 */
3926 warn_on_nonidempotent_op(op);
082d4bd7 3927 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3928 }
9411b1d4 3929 if (so) {
082d4bd7
BF		 3930 int len = xdr->buf->len - post_err_offset;
3931
9411b1d4 3932 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3933 so->so_replay.rp_buflen = len;
3934 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3935 so->so_replay.rp_buf, len);
9411b1d4 3936 }
695e12f8 3937status:
082d4bd7
BF		 3938 /* Note that op->status is already in network byte order: */
3939 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3940}
3941
3942/*
3943 * Encode the reply stored in the stateowner reply cache
3944 *
3945 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3946 * previously sent already encoded operation.
3947 *
3948 * called with nfs4_lock_state() held
3949 */
3950void
d0a381dd 3951nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3952{
bc749ca4 3953 __be32 *p;
1da177e4
LT		 3954 struct nfs4_replay *rp = op->replay;
3955
3956 BUG_ON(!rp);
3957
d0a381dd
BF		 3958 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3959 if (!p) {
3960 WARN_ON_ONCE(1);
3961 return;
3962 }
1da177e4
LT		 3963 WRITE32(op->opnum);
3964 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3965
1da177e4 3966 WRITEMEM(rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3967}
3968
1da177e4 3969int
2ebbc012 3970nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3971{
3972 return xdr_ressize_check(rqstp, p);
3973}
3974
3e98abff 3975int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3976{
3e98abff
BF		 3977 struct svc_rqst *rqstp = rq;
3978 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3979
1da177e4
LT		 3980 if (args->ops != args->iops) {
3981 kfree(args->ops);
3982 args->ops = args->iops;
3983 }
f99d49ad
JJ		 3984 kfree(args->tmpp);
3985 args->tmpp = NULL;
1da177e4
LT		 3986 while (args->to_free) {
3987 struct tmpbuf *tb = args->to_free;
3988 args->to_free = tb->next;
3989 tb->release(tb->buf);
3990 kfree(tb);
3991 }
3e98abff 3992 return 1;
1da177e4
LT		 3993}
3994
3995int
2ebbc012 3996nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3997{
e874f9f8
JL		 3998 if (rqstp->rq_arg.head[0].iov_len % 4) {
3999 /* client is nuts */
4000 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4001 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4002 return 0;
4003 }
1da177e4
LT		 4004 args->p = p;
4005 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4006 args->pagelist = rqstp->rq_arg.pages;
4007 args->pagelen = rqstp->rq_arg.page_len;
4008 args->tmpp = NULL;
4009 args->to_free = NULL;
4010 args->ops = args->iops;
4011 args->rqstp = rqstp;
4012
3e98abff 4013 return !nfsd4_decode_compound(args);
1da177e4
LT		 4014}
4015
4016int
2ebbc012 4017nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4018{
4019 /*
4020 * All that remains is to write the tag and operation count...
4021 */
557ce264 4022 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4023 struct xdr_buf *buf = resp->xdr.buf;
4024
4025 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4026 buf->tail[0].iov_len);
dd97fdde 4027
2825a7f9
BF		 4028 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4029
1da177e4
LT		 4030 p = resp->tagp;
4031 *p++ = htonl(resp->taglen);
4032 memcpy(p, resp->tag, resp->taglen);
4033 p += XDR_QUADLEN(resp->taglen);
4034 *p++ = htonl(resp->opcnt);
4035
26c0c75e 4036 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4037 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4038 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4039 if (cs->status != nfserr_replay_cache) {
4040 nfsd4_store_cache_entry(resp);
73e79482 4041 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4042 }
d7682988 4043 /* Renew the clientid on success and on replay */
f0f51f5c 4044 spin_lock(&nn->client_lock);
221a6876 4045 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4046 spin_unlock(&nn->client_lock);
4047 put_client_renew(clp);
da3846a2 4048 }
1da177e4
LT		 4049 return 1;
4050}
4051
4052/*
4053 * Local variables:
4054 * c-basic-offset: 8
4055 * End:
4056 */
Michael's Linux tree.