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nfsd4: enforce rd_dircount
[mirror_ubuntu-artful-kernel.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
1da177e4
LT		 106#define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109} while (0)
110#define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
817cb9d4
CL		 114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
1da177e4
LT		 116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119} while (0)
120#define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124
125/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126#define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
1da177e4
LT		 133 goto xdr_error; \
134 } \
135} while (0)
136
590b7431
BF		 137static void next_decode_page(struct nfsd4_compoundargs *argp)
138{
590b7431 139 argp->p = page_address(argp->pagelist[0]);
365da4ad 140 argp->pagelist++;
590b7431
BF		 141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148}
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4 176 memcpy(p, argp->p, avail);
590b7431 177 next_decode_page(argp);
1da177e4
LT		 178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181}
182
60adfc50
AA		 183static int zero_clientid(clientid_t *clid)
184{
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186}
187
2d8498db
CH		 188/**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2d8498db
CH		 213/**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
2ebbc012 223static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 224{
1da177e4 225 if (p == argp->tmp) {
67114fe6 226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 227 if (!p)
228 return NULL;
1da177e4 229 } else {
73dff8be 230 BUG_ON(p != argp->tmpp);
1da177e4
LT		 231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
a4db5fe5 234 kfree(p);
1da177e4
LT		 235 return NULL;
236 } else
237 return (char *)p;
238}
239
b37ad28b 240static __be32
1da177e4
LT		 241nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242{
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
7e705706 248 bmval[2] = 0;
1da177e4
LT		 249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
7e705706
AA		 260 if (bmlen > 2)
261 READ32(bmval[2]);
1da177e4
LT		 262
263 DECODE_TAIL;
264}
265
b37ad28b 266static __be32
3c8e0316 267nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
1da177e4
LT		 270{
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
1da177e4
LT		 280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 290 u32 nace;
28e05dd8 291 struct nfs4_ace *ace;
1da177e4
LT		 292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
28e05dd8 296 if (nace > NFS4_ACL_MAX)
798df338 297 return nfserr_fbig;
28e05dd8
BF		 298
299 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 300 if (*acl == NULL)
301 return nfserr_jukebox;
302
28e05dd8 303 defer_free(argp, kfree, *acl);
1da177e4 304
28e05dd8
BF		 305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 307 READ_BUF(16); len += 16;
28e05dd8
BF		 308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
1da177e4
LT		 311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
28e05dd8 315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 316 status = nfs_ok;
28e05dd8 317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 318 ;
28e05dd8 319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 320 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 321 buf, dummy32, &ace->who_gid);
1da177e4 322 else
3c726023 323 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_uid);
3c726023
BF		 325 if (status)
326 return status;
1da177e4
LT		 327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
47c85291
N		 344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
1da177e4
LT		 346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
47c85291
N		 355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
1da177e4
LT		 357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
bf8d9097 369 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
1da177e4
LT		 382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
bf8d9097 392 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
18032ca0
DQ		 405
406 label->len = 0;
407#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
3378b7f4 426 label->len = dummy32;
18032ca0
DQ		 427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430#endif
431
3c8e0316
YZ		 432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
1da177e4
LT		 437 goto xdr_error;
438
439 DECODE_TAIL;
1da177e4
LT		 440}
441
e31a1b66
BH		 442static __be32
443nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444{
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463}
464
acb2887e
BF		 465static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466{
467 DECODE_HEAD;
12fc3e92 468 u32 dummy, uid, gid;
acb2887e
BF		 469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
57569a70
BF		 476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
acb2887e
BF		 481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
12fc3e92
BF		 487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
12fc3e92
BF		 502 READ32(uid);
503 READ32(gid);
acb2887e
BF		 504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
12fc3e92 509 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
12fc3e92 520 }
acb2887e
BF		 521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543}
544
cb73a9f4
BF		 545static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546{
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554}
555
1d1bc8f2
BF		 556static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557{
558 DECODE_HEAD;
1d1bc8f2
BF		 559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
6ce2357f
BS		 563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
1d1bc8f2
BF		 565 DECODE_TAIL;
566}
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570{
571 DECODE_HEAD;
572
e31a1b66 573 READ_BUF(4);
1da177e4 574 READ32(close->cl_seqid);
e31a1b66 575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 576
577 DECODE_TAIL;
578}
579
580
b37ad28b 581static __be32
1da177e4
LT		 582nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583{
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591}
592
b37ad28b 593static __be32
1da177e4
LT		 594nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595{
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 625 return status;
626
3c8e0316 627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 628 &create->cr_acl, &create->cr_label);
c0d6fc8a 629 if (status)
1da177e4
LT		 630 goto out;
631
632 DECODE_TAIL;
633}
634
b37ad28b 635static inline __be32
1da177e4
LT		 636nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637{
e31a1b66 638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 639}
640
b37ad28b 641static inline __be32
1da177e4
LT		 642nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643{
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 656 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 657 return status;
658
659 DECODE_TAIL;
660}
661
b37ad28b 662static __be32
1da177e4
LT		 663nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664{
665 DECODE_HEAD;
666
1da177e4
LT		 667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
e31a1b66 680 READ_BUF(4);
1da177e4 681 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
e31a1b66
BH		 692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
1da177e4
LT		 696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700}
701
b37ad28b 702static __be32
1da177e4
LT		 703nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704{
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723{
724 DECODE_HEAD;
725
e31a1b66 726 READ_BUF(8);
1da177e4
LT		 727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
1da177e4
LT		 735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743{
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 751 return status;
752
753 DECODE_TAIL;
754}
755
2c8bd7e0 756static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 757{
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
2c8bd7e0
BH		 763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
04f9e664
BF		 768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
fc0d14fe 776 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
92bac8c5 792 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 793 if (!w)
794 return nfs_ok;
2c8bd7e0
BH		 795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
04f9e664
BF		 798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 803 return nfs_ok;
804 }
805xdr_error:
806 return nfserr_bad_xdr;
807}
808
809static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810{
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 816 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 817 return nfserr_bad_xdr;
818 return nfs_ok;
819xdr_error:
820 return nfserr_bad_xdr;
821}
822
a084daf5
BF		 823static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824{
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836xdr_error:
837 return nfserr_bad_xdr;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842{
843 DECODE_HEAD;
2c8bd7e0 844 u32 dummy;
1da177e4
LT		 845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
fe0750e5 848 open->op_openowner = NULL;
1da177e4 849
9d313b17 850 open->op_xdr_error = 0;
1da177e4 851 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 852 READ_BUF(4);
1da177e4 853 READ32(open->op_seqid);
2c8bd7e0
BH		 854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
04f9e664
BF		 857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
a084daf5 862 READ_BUF(sizeof(clientid_t));
1da177e4 863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
1da177e4
LT		 868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
c0d6fc8a 878 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 879 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 880 if (status)
1da177e4
LT		 881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 886 break;
79fb54ab
BH		 887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
ab4684d1
CL		 890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 892 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 893 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 894 if (status)
895 goto out;
896 break;
1da177e4
LT		 897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
1da177e4
LT		 927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 931 return status;
932 break;
8b289b2c
BF		 933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
1da177e4
LT		 946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951}
952
b37ad28b 953static __be32
1da177e4
LT		 954nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955{
956 DECODE_HEAD;
e1a90ebd
AS		 957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
e31a1b66
BH		 961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
1da177e4 965 READ32(open_conf->oc_seqid);
e1a90ebd 966
1da177e4
LT		 967 DECODE_TAIL;
968}
969
b37ad28b 970static __be32
1da177e4
LT		 971nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972{
973 DECODE_HEAD;
974
e31a1b66
BH		 975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
04f9e664 978 READ_BUF(4);
1da177e4 979 READ32(open_down->od_seqid);
2c8bd7e0
BH		 980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
04f9e664
BF		 982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
1da177e4
LT		 987 DECODE_TAIL;
988}
989
b37ad28b 990static __be32
1da177e4
LT		 991nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992{
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003}
1004
e1a90ebd
AS		 1005static __be32
1006nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007{
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011}
1012
b37ad28b 1013static __be32
1da177e4
LT		 1014nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015{
1016 DECODE_HEAD;
1017
e31a1b66
BH		 1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1da177e4
LT		 1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
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 */
1da177e4
LT		 1615 int i;
1616
1da177e4
LT		 1617 READ_BUF(4);
1618 READ32(argp->taglen);
1619 READ_BUF(argp->taglen + 8);
1620 SAVEMEM(argp->tag, argp->taglen);
1621 READ32(argp->minorversion);
1622 READ32(argp->opcnt);
4f0cefbf 1623 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1624
1625 if (argp->taglen > NFSD4_MAX_TAGLEN)
1626 goto xdr_error;
1627 if (argp->opcnt > 100)
1628 goto xdr_error;
1629
e8c96f8c 1630 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1631 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1632 if (!argp->ops) {
1633 argp->ops = argp->iops;
817cb9d4 1634 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1635 goto xdr_error;
1636 }
1637 }
1638
e1a90ebd 1639 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1640 argp->opcnt = 0;
1641
1da177e4
LT		 1642 for (i = 0; i < argp->opcnt; i++) {
1643 op = &argp->ops[i];
1644 op->replay = NULL;
1645
8a61b18c
BF		 1646 READ_BUF(4);
1647 READ32(op->opnum);
1da177e4 1648
e1a90ebd
AS		 1649 if (nfsd4_opnum_in_range(argp, op))
1650 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1651 else {
1da177e4
LT		 1652 op->opnum = OP_ILLEGAL;
1653 op->status = nfserr_op_illegal;
1da177e4 1654 }
1091006c
BF		 1655 /*
1656 * We'll try to cache the result in the DRC if any one
1657 * op in the compound wants to be cached:
1658 */
1659 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1660
4f0cefbf 1661 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1662
1663 if (op->status) {
1664 argp->opcnt = i+1;
1665 break;
1666 }
1da177e4 1667 }
1091006c
BF		 1668 /* Sessions make the DRC unnecessary: */
1669 if (argp->minorversion)
1670 cachethis = false;
4f0cefbf 1671 svc_reserve(argp->rqstp, max_reply);
1091006c 1672 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1673
1674 DECODE_TAIL;
1675}
1da177e4 1676
1da177e4
LT		 1677#define WRITE32(n) *p++ = htonl(n)
1678#define WRITE64(n) do { \
1679 *p++ = htonl((u32)((n) >> 32)); \
1680 *p++ = htonl((u32)(n)); \
1681} while (0)
5108b276 1682#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1683 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1684 memcpy(p, ptr, nbytes); \
1685 p += XDR_QUADLEN(nbytes); \
5108b276 1686}} while (0)
c654b8a9
BF		 1687
1688static void write32(__be32 **p, u32 n)
1689{
45eaa1c1 1690 *(*p)++ = htonl(n);
c654b8a9
BF		 1691}
1692
1693static void write64(__be32 **p, u64 n)
1694{
45eaa1c1 1695 write32(p, (n >> 32));
c654b8a9
BF		 1696 write32(p, (u32)n);
1697}
1698
1699static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1700{
1701 if (IS_I_VERSION(inode)) {
1702 write64(p, inode->i_version);
1703 } else {
1704 write32(p, stat->ctime.tv_sec);
1705 write32(p, stat->ctime.tv_nsec);
1706 }
1707}
1708
1709static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1710{
1711 write32(p, c->atomic);
1712 if (c->change_supported) {
1713 write64(p, c->before_change);
1714 write64(p, c->after_change);
1715 } else {
1716 write32(p, c->before_ctime_sec);
1717 write32(p, c->before_ctime_nsec);
1718 write32(p, c->after_ctime_sec);
1719 write32(p, c->after_ctime_nsec);
1720 }
1721}
1da177e4 1722
81c3f413 1723/* Encode as an array of strings the string given with components
e7a0444a 1724 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1725 */
ddd1ea56
BF		 1726static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1727 char *components, char esc_enter,
1728 char esc_exit)
81c3f413 1729{
ddd1ea56 1730 __be32 *p;
082d4bd7
BF		 1731 __be32 pathlen;
1732 int pathlen_offset;
81c3f413 1733 int strlen, count=0;
e7a0444a 1734 char *str, *end, *next;
81c3f413
BF		 1735
1736 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1737
1738 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1739 p = xdr_reserve_space(xdr, 4);
1740 if (!p)
81c3f413 1741 return nfserr_resource;
082d4bd7
BF		 1742 p++; /* We will fill this in with @count later */
1743
81c3f413
BF		 1744 end = str = components;
1745 while (*end) {
e7a0444a
WAA		 1746 bool found_esc = false;
1747
1748 /* try to parse as esc_start, ..., esc_end, sep */
1749 if (*str == esc_enter) {
1750 for (; *end && (*end != esc_exit); end++)
1751 /* find esc_exit or end of string */;
1752 next = end + 1;
1753 if (*end && (!*next || *next == sep)) {
1754 str++;
1755 found_esc = true;
1756 }
1757 }
1758
1759 if (!found_esc)
1760 for (; *end && (*end != sep); end++)
1761 /* find sep or end of string */;
1762
81c3f413
BF		 1763 strlen = end - str;
1764 if (strlen) {
ddd1ea56
BF		 1765 p = xdr_reserve_space(xdr, strlen + 4);
1766 if (!p)
81c3f413
BF		 1767 return nfserr_resource;
1768 WRITE32(strlen);
1769 WRITEMEM(str, strlen);
1770 count++;
1771 }
1772 else
1773 end++;
1774 str = end;
1775 }
082d4bd7
BF		 1776 pathlen = htonl(xdr->buf->len - pathlen_offset);
1777 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1778 return 0;
1779}
1780
e7a0444a
WAA		 1781/* Encode as an array of strings the string given with components
1782 * separated @sep.
1783 */
ddd1ea56
BF		 1784static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1785 char *components)
e7a0444a 1786{
ddd1ea56 1787 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1788}
1789
81c3f413
BF		 1790/*
1791 * encode a location element of a fs_locations structure
1792 */
ddd1ea56
BF		 1793static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1794 struct nfsd4_fs_location *location)
81c3f413 1795{
b37ad28b 1796 __be32 status;
81c3f413 1797
ddd1ea56 1798 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1799 '[', ']');
81c3f413
BF		 1800 if (status)
1801 return status;
ddd1ea56 1802 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1803 if (status)
1804 return status;
81c3f413
BF		 1805 return 0;
1806}
1807
1808/*
ed748aac 1809 * Encode a path in RFC3530 'pathname4' format
81c3f413 1810 */
ddd1ea56
BF		 1811static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1812 const struct path *root,
1813 const struct path *path)
81c3f413 1814{
301f0268 1815 struct path cur = *path;
ddd1ea56 1816 __be32 *p;
ed748aac
TM		 1817 struct dentry **components = NULL;
1818 unsigned int ncomponents = 0;
1819 __be32 err = nfserr_jukebox;
81c3f413 1820
ed748aac 1821 dprintk("nfsd4_encode_components(");
81c3f413 1822
ed748aac
TM		 1823 path_get(&cur);
1824 /* First walk the path up to the nfsd root, and store the
1825 * dentries/path components in an array.
1826 */
1827 for (;;) {
1828 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1829 break;
1830 if (cur.dentry == cur.mnt->mnt_root) {
1831 if (follow_up(&cur))
1832 continue;
1833 goto out_free;
1834 }
1835 if ((ncomponents & 15) == 0) {
1836 struct dentry **new;
1837 new = krealloc(components,
1838 sizeof(*new) * (ncomponents + 16),
1839 GFP_KERNEL);
1840 if (!new)
1841 goto out_free;
1842 components = new;
1843 }
1844 components[ncomponents++] = cur.dentry;
1845 cur.dentry = dget_parent(cur.dentry);
1846 }
ddd1ea56
BF		 1847 err = nfserr_resource;
1848 p = xdr_reserve_space(xdr, 4);
1849 if (!p)
ed748aac
TM		 1850 goto out_free;
1851 WRITE32(ncomponents);
1852
1853 while (ncomponents) {
1854 struct dentry *dentry = components[ncomponents - 1];
301f0268 1855 unsigned int len;
ed748aac 1856
301f0268
AV		 1857 spin_lock(&dentry->d_lock);
1858 len = dentry->d_name.len;
ddd1ea56
BF		 1859 p = xdr_reserve_space(xdr, len + 4);
1860 if (!p) {
301f0268 1861 spin_unlock(&dentry->d_lock);
ed748aac 1862 goto out_free;
301f0268 1863 }
ed748aac
TM		 1864 WRITE32(len);
1865 WRITEMEM(dentry->d_name.name, len);
1866 dprintk("/%s", dentry->d_name.name);
301f0268 1867 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1868 dput(dentry);
1869 ncomponents--;
81c3f413 1870 }
ed748aac 1871
ed748aac
TM		 1872 err = 0;
1873out_free:
1874 dprintk(")\n");
1875 while (ncomponents)
1876 dput(components[--ncomponents]);
1877 kfree(components);
1878 path_put(&cur);
1879 return err;
1880}
1881
ddd1ea56
BF		 1882static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1883 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1884{
1885 struct svc_export *exp_ps;
1886 __be32 res;
1887
1888 exp_ps = rqst_find_fsidzero_export(rqstp);
1889 if (IS_ERR(exp_ps))
1890 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1891 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1892 exp_put(exp_ps);
1893 return res;
81c3f413
BF		 1894}
1895
1896/*
1897 * encode a fs_locations structure
1898 */
ddd1ea56
BF		 1899static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1900 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1901{
b37ad28b 1902 __be32 status;
cc45f017 1903 int i;
ddd1ea56 1904 __be32 *p;
81c3f413 1905 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1906
ddd1ea56 1907 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1908 if (status)
1909 return status;
ddd1ea56
BF		 1910 p = xdr_reserve_space(xdr, 4);
1911 if (!p)
81c3f413
BF		 1912 return nfserr_resource;
1913 WRITE32(fslocs->locations_count);
1914 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1915 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1916 if (status)
1917 return status;
1918 }
81c3f413
BF		 1919 return 0;
1920}
1da177e4 1921
3d2544b1
BF		 1922static u32 nfs4_file_type(umode_t mode)
1923{
1924 switch (mode & S_IFMT) {
1925 case S_IFIFO: return NF4FIFO;
1926 case S_IFCHR: return NF4CHR;
1927 case S_IFDIR: return NF4DIR;
1928 case S_IFBLK: return NF4BLK;
1929 case S_IFLNK: return NF4LNK;
1930 case S_IFREG: return NF4REG;
1931 case S_IFSOCK: return NF4SOCK;
1932 default: return NF4BAD;
1933 };
1934}
1da177e4 1935
b37ad28b 1936static inline __be32
ddd1ea56
BF		 1937nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1938 struct nfs4_ace *ace)
1da177e4 1939{
3554116d 1940 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1941 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1942 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1943 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1944 else
ddd1ea56 1945 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1946}
1947
42ca0993
BF		 1948#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1949 FATTR4_WORD0_RDATTR_ERROR)
1950#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1951
18032ca0
DQ		 1952#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1953static inline __be32
ddd1ea56
BF		 1954nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1955 void *context, int len)
18032ca0 1956{
ddd1ea56 1957 __be32 *p;
18032ca0 1958
ddd1ea56
BF		 1959 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1960 if (!p)
18032ca0
DQ		 1961 return nfserr_resource;
1962
1963 /*
1964 * For now we use a 0 here to indicate the null translation; in
1965 * the future we may place a call to translation code here.
1966 */
18032ca0
DQ		 1967 WRITE32(0); /* lfs */
1968 WRITE32(0); /* pi */
1969 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1970 return 0;
1971}
1972#else
1973static inline __be32
ddd1ea56
BF		 1974nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1975 void *context, int len)
18032ca0
DQ		 1976{ return 0; }
1977#endif
1978
b37ad28b 1979static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1980{
1981 /* As per referral draft: */
1982 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1983 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1984 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1985 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1986 *rdattr_err = NFSERR_MOVED;
1987 else
1988 return nfserr_moved;
1989 }
1990 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1991 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1992 return 0;
1993}
1da177e4 1994
ae7095a7
BF		 1995
1996static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1997{
1998 struct path path = exp->ex_path;
1999 int err;
2000
2001 path_get(&path);
2002 while (follow_up(&path)) {
2003 if (path.dentry != path.mnt->mnt_root)
2004 break;
2005 }
3dadecce 2006 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2007 path_put(&path);
2008 return err;
2009}
2010
1da177e4
LT		 2011/*
2012 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2013 * ourselves.
1da177e4 2014 */
b37ad28b 2015__be32
d5184658
BF		 2016nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2017 struct svc_export *exp,
2018 struct dentry *dentry, u32 *bmval,
406a7ea9 2019 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2020{
2021 u32 bmval0 = bmval[0];
2022 u32 bmval1 = bmval[1];
7e705706 2023 u32 bmval2 = bmval[2];
1da177e4 2024 struct kstat stat;
d50e6136 2025 struct svc_fh *tempfh = NULL;
1da177e4 2026 struct kstatfs statfs;
ddd1ea56 2027 __be32 *p;
1fcea5b2 2028 int starting_len = xdr->buf->len;
082d4bd7
BF		 2029 int attrlen_offset;
2030 __be32 attrlen;
1da177e4
LT		 2031 u32 dummy;
2032 u64 dummy64;
42ca0993 2033 u32 rdattr_err = 0;
b37ad28b 2034 __be32 status;
b8dd7b9a 2035 int err;
1da177e4
LT		 2036 int aclsupport = 0;
2037 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2038 void *context = NULL;
2039 int contextlen;
2040 bool contextsupport = false;
7e705706
AA		 2041 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2042 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2043 struct path path = {
2044 .mnt = exp->ex_path.mnt,
2045 .dentry = dentry,
2046 };
3d733711 2047 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2048
2049 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2050 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2051 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2052 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2053
42ca0993 2054 if (exp->ex_fslocs.migrated) {
7e705706 2055 BUG_ON(bmval[2]);
42ca0993
BF		 2056 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2057 if (status)
2058 goto out;
2059 }
2060
3dadecce 2061 err = vfs_getattr(&path, &stat);
b8dd7b9a 2062 if (err)
1da177e4 2063 goto out_nfserr;
a16e92ed
BF		 2064 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2065 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2066 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2067 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2068 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2069 if (err)
1da177e4
LT		 2070 goto out_nfserr;
2071 }
2072 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2073 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2074 status = nfserr_jukebox;
2075 if (!tempfh)
2076 goto out;
2077 fh_init(tempfh, NFS4_FHSIZE);
2078 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2079 if (status)
2080 goto out;
d50e6136 2081 fhp = tempfh;
1da177e4
LT		 2082 }
2083 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2084 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2085 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2086 aclsupport = (err == 0);
1da177e4 2087 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2088 if (err == -EOPNOTSUPP)
1da177e4 2089 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2090 else if (err == -EINVAL) {
1da177e4
LT		 2091 status = nfserr_attrnotsupp;
2092 goto out;
b8dd7b9a 2093 } else if (err != 0)
1da177e4
LT		 2094 goto out_nfserr;
2095 }
2096 }
1da177e4 2097
18032ca0
DQ		 2098#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2099 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2100 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2101 err = security_inode_getsecctx(dentry->d_inode,
2102 &context, &contextlen);
2103 contextsupport = (err == 0);
2104 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2105 if (err == -EOPNOTSUPP)
2106 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2107 else if (err)
2108 goto out_nfserr;
2109 }
2110 }
2111#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2112
2b44f1ba 2113 if (bmval2) {
ddd1ea56
BF		 2114 p = xdr_reserve_space(xdr, 16);
2115 if (!p)
2b44f1ba 2116 goto out_resource;
7e705706
AA		 2117 WRITE32(3);
2118 WRITE32(bmval0);
2119 WRITE32(bmval1);
2120 WRITE32(bmval2);
2b44f1ba 2121 } else if (bmval1) {
ddd1ea56
BF		 2122 p = xdr_reserve_space(xdr, 12);
2123 if (!p)
2b44f1ba 2124 goto out_resource;
7e705706
AA		 2125 WRITE32(2);
2126 WRITE32(bmval0);
2127 WRITE32(bmval1);
2128 } else {
ddd1ea56
BF		 2129 p = xdr_reserve_space(xdr, 8);
2130 if (!p)
2b44f1ba 2131 goto out_resource;
7e705706
AA		 2132 WRITE32(1);
2133 WRITE32(bmval0);
2134 }
082d4bd7
BF		 2135
2136 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2137 p = xdr_reserve_space(xdr, 4);
2138 if (!p)
2139 goto out_resource;
082d4bd7 2140 p++; /* to be backfilled later */
1da177e4
LT		 2141
2142 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2143 u32 word0 = nfsd_suppattrs0(minorversion);
2144 u32 word1 = nfsd_suppattrs1(minorversion);
2145 u32 word2 = nfsd_suppattrs2(minorversion);
2146
42ca0993
BF		 2147 if (!aclsupport)
2148 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2149 if (!contextsupport)
2150 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2151 if (!word2) {
ddd1ea56
BF		 2152 p = xdr_reserve_space(xdr, 12);
2153 if (!p)
2b44f1ba 2154 goto out_resource;
7e705706
AA		 2155 WRITE32(2);
2156 WRITE32(word0);
2157 WRITE32(word1);
2158 } else {
ddd1ea56
BF		 2159 p = xdr_reserve_space(xdr, 16);
2160 if (!p)
2b44f1ba 2161 goto out_resource;
7e705706
AA		 2162 WRITE32(3);
2163 WRITE32(word0);
2164 WRITE32(word1);
2165 WRITE32(word2);
2166 }
1da177e4
LT		 2167 }
2168 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2169 p = xdr_reserve_space(xdr, 4);
2170 if (!p)
1da177e4 2171 goto out_resource;
3d2544b1 2172 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2173 if (dummy == NF4BAD) {
2174 status = nfserr_serverfault;
2175 goto out;
2176 }
1da177e4
LT		 2177 WRITE32(dummy);
2178 }
2179 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2180 p = xdr_reserve_space(xdr, 4);
2181 if (!p)
1da177e4 2182 goto out_resource;
49640001 2183 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2184 WRITE32(NFS4_FH_PERSISTENT);
49640001 2185 else
e34ac862 2186 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2187 }
2188 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2189 p = xdr_reserve_space(xdr, 8);
2190 if (!p)
1da177e4 2191 goto out_resource;
c654b8a9 2192 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2193 }
2194 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2195 p = xdr_reserve_space(xdr, 8);
2196 if (!p)
1da177e4
LT		 2197 goto out_resource;
2198 WRITE64(stat.size);
2199 }
2200 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2201 p = xdr_reserve_space(xdr, 4);
2202 if (!p)
1da177e4
LT		 2203 goto out_resource;
2204 WRITE32(1);
2205 }
2206 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2207 p = xdr_reserve_space(xdr, 4);
2208 if (!p)
1da177e4
LT		 2209 goto out_resource;
2210 WRITE32(1);
2211 }
2212 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2213 p = xdr_reserve_space(xdr, 4);
2214 if (!p)
1da177e4
LT		 2215 goto out_resource;
2216 WRITE32(0);
2217 }
2218 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2219 p = xdr_reserve_space(xdr, 16);
2220 if (!p)
1da177e4 2221 goto out_resource;
42ca0993
BF		 2222 if (exp->ex_fslocs.migrated) {
2223 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2224 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2225 } else switch(fsid_source(fhp)) {
2226 case FSIDSOURCE_FSID:
1da177e4
LT		 2227 WRITE64((u64)exp->ex_fsid);
2228 WRITE64((u64)0);
af6a4e28
N		 2229 break;
2230 case FSIDSOURCE_DEV:
1da177e4
LT		 2231 WRITE32(0);
2232 WRITE32(MAJOR(stat.dev));
2233 WRITE32(0);
2234 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2235 break;
2236 case FSIDSOURCE_UUID:
2237 WRITEMEM(exp->ex_uuid, 16);
2238 break;
1da177e4
LT		 2239 }
2240 }
2241 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2242 p = xdr_reserve_space(xdr, 4);
2243 if (!p)
1da177e4
LT		 2244 goto out_resource;
2245 WRITE32(0);
2246 }
2247 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2248 p = xdr_reserve_space(xdr, 4);
2249 if (!p)
1da177e4 2250 goto out_resource;
3d733711 2251 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2252 }
2253 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2254 p = xdr_reserve_space(xdr, 4);
2255 if (!p)
1da177e4 2256 goto out_resource;
42ca0993 2257 WRITE32(rdattr_err);
1da177e4
LT		 2258 }
2259 if (bmval0 & FATTR4_WORD0_ACL) {
2260 struct nfs4_ace *ace;
1da177e4
LT		 2261
2262 if (acl == NULL) {
ddd1ea56
BF		 2263 p = xdr_reserve_space(xdr, 4);
2264 if (!p)
1da177e4
LT		 2265 goto out_resource;
2266
2267 WRITE32(0);
2268 goto out_acl;
2269 }
ddd1ea56
BF		 2270 p = xdr_reserve_space(xdr, 4);
2271 if (!p)
1da177e4
LT		 2272 goto out_resource;
2273 WRITE32(acl->naces);
2274
28e05dd8 2275 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2276 p = xdr_reserve_space(xdr, 4*3);
2277 if (!p)
1da177e4
LT		 2278 goto out_resource;
2279 WRITE32(ace->type);
2280 WRITE32(ace->flag);
2281 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ddd1ea56 2282 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2283 if (status)
2284 goto out;
2285 }
2286 }
2287out_acl:
2288 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2289 p = xdr_reserve_space(xdr, 4);
2290 if (!p)
1da177e4
LT		 2291 goto out_resource;
2292 WRITE32(aclsupport ?
2293 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2294 }
2295 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2296 p = xdr_reserve_space(xdr, 4);
2297 if (!p)
1da177e4
LT		 2298 goto out_resource;
2299 WRITE32(1);
2300 }
2301 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2302 p = xdr_reserve_space(xdr, 4);
2303 if (!p)
1da177e4 2304 goto out_resource;
2930d381 2305 WRITE32(0);
1da177e4
LT		 2306 }
2307 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2308 p = xdr_reserve_space(xdr, 4);
2309 if (!p)
1da177e4
LT		 2310 goto out_resource;
2311 WRITE32(1);
2312 }
2313 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2314 p = xdr_reserve_space(xdr, 4);
2315 if (!p)
1da177e4
LT		 2316 goto out_resource;
2317 WRITE32(1);
2318 }
2319 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2320 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2321 if (!p)
1da177e4
LT		 2322 goto out_resource;
2323 WRITE32(fhp->fh_handle.fh_size);
2324 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2325 }
2326 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2327 p = xdr_reserve_space(xdr, 8);
2328 if (!p)
1da177e4 2329 goto out_resource;
40ee5dc6 2330 WRITE64(stat.ino);
1da177e4
LT		 2331 }
2332 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2333 p = xdr_reserve_space(xdr, 8);
2334 if (!p)
1da177e4
LT		 2335 goto out_resource;
2336 WRITE64((u64) statfs.f_ffree);
2337 }
2338 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2339 p = xdr_reserve_space(xdr, 8);
2340 if (!p)
1da177e4
LT		 2341 goto out_resource;
2342 WRITE64((u64) statfs.f_ffree);
2343 }
2344 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2345 p = xdr_reserve_space(xdr, 8);
2346 if (!p)
1da177e4
LT		 2347 goto out_resource;
2348 WRITE64((u64) statfs.f_files);
2349 }
81c3f413 2350 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2351 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2352 if (status)
2353 goto out;
2354 }
1da177e4 2355 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2356 p = xdr_reserve_space(xdr, 4);
2357 if (!p)
1da177e4
LT		 2358 goto out_resource;
2359 WRITE32(1);
2360 }
2361 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2362 p = xdr_reserve_space(xdr, 8);
2363 if (!p)
1da177e4 2364 goto out_resource;
aea240f4 2365 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2366 }
2367 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2368 p = xdr_reserve_space(xdr, 4);
2369 if (!p)
1da177e4
LT		 2370 goto out_resource;
2371 WRITE32(255);
2372 }
2373 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2374 p = xdr_reserve_space(xdr, 4);
2375 if (!p)
1da177e4 2376 goto out_resource;
a16e92ed 2377 WRITE32(statfs.f_namelen);
1da177e4
LT		 2378 }
2379 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2380 p = xdr_reserve_space(xdr, 8);
2381 if (!p)
1da177e4 2382 goto out_resource;
7adae489 2383 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2384 }
2385 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2386 p = xdr_reserve_space(xdr, 8);
2387 if (!p)
1da177e4 2388 goto out_resource;
7adae489 2389 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2390 }
2391 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2392 p = xdr_reserve_space(xdr, 4);
2393 if (!p)
1da177e4
LT		 2394 goto out_resource;
2395 WRITE32(stat.mode & S_IALLUGO);
2396 }
2397 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2398 p = xdr_reserve_space(xdr, 4);
2399 if (!p)
1da177e4
LT		 2400 goto out_resource;
2401 WRITE32(1);
2402 }
2403 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2404 p = xdr_reserve_space(xdr, 4);
2405 if (!p)
1da177e4
LT		 2406 goto out_resource;
2407 WRITE32(stat.nlink);
2408 }
2409 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2410 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2411 if (status)
2412 goto out;
2413 }
2414 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2415 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2416 if (status)
2417 goto out;
2418 }
2419 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2420 p = xdr_reserve_space(xdr, 8);
2421 if (!p)
1da177e4
LT		 2422 goto out_resource;
2423 WRITE32((u32) MAJOR(stat.rdev));
2424 WRITE32((u32) MINOR(stat.rdev));
2425 }
2426 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2427 p = xdr_reserve_space(xdr, 8);
2428 if (!p)
1da177e4
LT		 2429 goto out_resource;
2430 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2431 WRITE64(dummy64);
2432 }
2433 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2434 p = xdr_reserve_space(xdr, 8);
2435 if (!p)
1da177e4
LT		 2436 goto out_resource;
2437 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2438 WRITE64(dummy64);
2439 }
2440 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2441 p = xdr_reserve_space(xdr, 8);
2442 if (!p)
1da177e4
LT		 2443 goto out_resource;
2444 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2445 WRITE64(dummy64);
2446 }
2447 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2448 p = xdr_reserve_space(xdr, 8);
2449 if (!p)
1da177e4
LT		 2450 goto out_resource;
2451 dummy64 = (u64)stat.blocks << 9;
2452 WRITE64(dummy64);
2453 }
2454 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2455 p = xdr_reserve_space(xdr, 12);
2456 if (!p)
1da177e4 2457 goto out_resource;
bf8d9097 2458 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2459 WRITE32(stat.atime.tv_nsec);
2460 }
2461 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2462 p = xdr_reserve_space(xdr, 12);
2463 if (!p)
1da177e4
LT		 2464 goto out_resource;
2465 WRITE32(0);
2466 WRITE32(1);
2467 WRITE32(0);
2468 }
2469 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2470 p = xdr_reserve_space(xdr, 12);
2471 if (!p)
1da177e4 2472 goto out_resource;
bf8d9097 2473 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2474 WRITE32(stat.ctime.tv_nsec);
2475 }
2476 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2477 p = xdr_reserve_space(xdr, 12);
2478 if (!p)
1da177e4 2479 goto out_resource;
bf8d9097 2480 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2481 WRITE32(stat.mtime.tv_nsec);
2482 }
2483 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2484 p = xdr_reserve_space(xdr, 8);
2485 if (!p)
1da177e4 2486 goto out_resource;
406a7ea9
FF		 2487 /*
2488 * Get parent's attributes if not ignoring crossmount
2489 * and this is the root of a cross-mounted filesystem.
2490 */
2491 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2492 dentry == exp->ex_path.mnt->mnt_root)
2493 get_parent_attributes(exp, &stat);
40ee5dc6 2494 WRITE64(stat.ino);
1da177e4 2495 }
18032ca0 2496 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2497 status = nfsd4_encode_security_label(xdr, rqstp, context,
2498 contextlen);
18032ca0
DQ		 2499 if (status)
2500 goto out;
2501 }
8c18f205 2502 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2503 p = xdr_reserve_space(xdr, 16);
2504 if (!p)
de3997a7 2505 goto out_resource;
8c18f205
BH		 2506 WRITE32(3);
2507 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2508 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2509 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2510 }
7e705706 2511
082d4bd7
BF		 2512 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2513 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2514 status = nfs_ok;
2515
2516out:
ba4e55bb 2517#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2518 if (context)
2519 security_release_secctx(context, contextlen);
ba4e55bb 2520#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2521 kfree(acl);
18df11d0 2522 if (tempfh) {
d50e6136 2523 fh_put(tempfh);
18df11d0
YZ		 2524 kfree(tempfh);
2525 }
1fcea5b2
BF		 2526 if (status)
2527 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2528 return status;
2529out_nfserr:
b8dd7b9a 2530 status = nfserrno(err);
1da177e4
LT		 2531 goto out;
2532out_resource:
1da177e4
LT		 2533 status = nfserr_resource;
2534 goto out;
1da177e4
LT		 2535}
2536
2825a7f9
BF		 2537static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2538 struct xdr_buf *buf, __be32 *p, int bytes)
2539{
2540 xdr->scratch.iov_len = 0;
2541 memset(buf, 0, sizeof(struct xdr_buf));
2542 buf->head[0].iov_base = p;
2543 buf->head[0].iov_len = 0;
2544 buf->len = 0;
2545 xdr->buf = buf;
2546 xdr->iov = buf->head;
2547 xdr->p = p;
2548 xdr->end = (void *)p + bytes;
2549 buf->buflen = bytes;
2550}
2551
d5184658
BF		 2552__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2553 struct svc_fh *fhp, struct svc_export *exp,
2554 struct dentry *dentry, u32 *bmval,
2555 struct svc_rqst *rqstp, int ignore_crossmnt)
2556{
2825a7f9 2557 struct xdr_buf dummy;
d5184658
BF		 2558 struct xdr_stream xdr;
2559 __be32 ret;
2560
2825a7f9 2561 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2562 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2563 ignore_crossmnt);
2564 *p = xdr.p;
2565 return ret;
2566}
2567
c0ce6ec8
BF		 2568static inline int attributes_need_mount(u32 *bmval)
2569{
2570 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2571 return 1;
2572 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2573 return 1;
2574 return 0;
2575}
2576
b37ad28b 2577static __be32
561f0ed4
BF		 2578nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2579 const char *name, int namlen)
1da177e4
LT		 2580{
2581 struct svc_export *exp = cd->rd_fhp->fh_export;
2582 struct dentry *dentry;
b37ad28b 2583 __be32 nfserr;
406a7ea9 2584 int ignore_crossmnt = 0;
1da177e4
LT		 2585
2586 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2587 if (IS_ERR(dentry))
2588 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2589 if (!dentry->d_inode) {
2590 /*
2591 * nfsd_buffered_readdir drops the i_mutex between
2592 * readdir and calling this callback, leaving a window
2593 * where this directory entry could have gone away.
2594 */
2595 dput(dentry);
2596 return nfserr_noent;
2597 }
1da177e4
LT		 2598
2599 exp_get(exp);
406a7ea9
FF		 2600 /*
2601 * In the case of a mountpoint, the client may be asking for
2602 * attributes that are only properties of the underlying filesystem
2603 * as opposed to the cross-mounted file system. In such a case,
2604 * we will not follow the cross mount and will fill the attribtutes
2605 * directly from the mountpoint dentry.
2606 */
3227fa41 2607 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2608 int err;
2609
3227fa41
BF		 2610 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2611 && !attributes_need_mount(cd->rd_bmval)) {
2612 ignore_crossmnt = 1;
2613 goto out_encode;
2614 }
dcb488a3
AA		 2615 /*
2616 * Why the heck aren't we just using nfsd_lookup??
2617 * Different "."/".." handling? Something else?
2618 * At least, add a comment here to explain....
2619 */
021d3a72
BF		 2620 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2621 if (err) {
2622 nfserr = nfserrno(err);
1da177e4
LT		 2623 goto out_put;
2624 }
dcb488a3
AA		 2625 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2626 if (nfserr)
2627 goto out_put;
1da177e4
LT		 2628
2629 }
3227fa41 2630out_encode:
561f0ed4 2631 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2632 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2633out_put:
2634 dput(dentry);
2635 exp_put(exp);
2636 return nfserr;
2637}
2638
2ebbc012 2639static __be32 *
561f0ed4 2640nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2641{
561f0ed4
BF		 2642 __be32 *p;
2643
2644 p = xdr_reserve_space(xdr, 6);
2645 if (!p)
1da177e4
LT		 2646 return NULL;
2647 *p++ = htonl(2);
2648 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2649 *p++ = htonl(0); /* bmval1 */
2650
87915c64 2651 *p++ = htonl(4); /* attribute length */
1da177e4 2652 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2653 return p;
2654}
2655
2656static int
a0ad13ef
N		 2657nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2658 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2659{
a0ad13ef 2660 struct readdir_cd *ccd = ccdv;
1da177e4 2661 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2662 struct xdr_stream *xdr = cd->xdr;
2663 int start_offset = xdr->buf->len;
2664 int cookie_offset;
2665 int entry_bytes;
b37ad28b 2666 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2667 __be64 wire_offset;
2668 __be32 *p;
1da177e4
LT		 2669
2670 /* In nfsv4, "." and ".." never make it onto the wire.. */
2671 if (name && isdotent(name, namlen)) {
2672 cd->common.err = nfs_ok;
2673 return 0;
2674 }
2675
561f0ed4
BF		 2676 if (cd->cookie_offset) {
2677 wire_offset = cpu_to_be64(offset);
2678 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2679 &wire_offset, 8);
2680 }
1da177e4 2681
561f0ed4
BF		 2682 p = xdr_reserve_space(xdr, 4);
2683 if (!p)
1da177e4 2684 goto fail;
1da177e4 2685 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2686 cookie_offset = xdr->buf->len;
2687 p = xdr_reserve_space(xdr, 3*4 + namlen);
2688 if (!p)
2689 goto fail;
1da177e4
LT		 2690 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2691 p = xdr_encode_array(p, name, namlen); /* name length & name */
2692
561f0ed4 2693 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2694 switch (nfserr) {
2695 case nfs_ok:
1da177e4
LT		 2696 break;
2697 case nfserr_resource:
2698 nfserr = nfserr_toosmall;
2699 goto fail;
b2c0cea6
BF		 2700 case nfserr_noent:
2701 goto skip_entry;
1da177e4
LT		 2702 default:
2703 /*
2704 * If the client requested the RDATTR_ERROR attribute,
2705 * we stuff the error code into this attribute
2706 * and continue. If this attribute was not requested,
2707 * then in accordance with the spec, we fail the
2708 * entire READDIR operation(!)
2709 */
2710 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2711 goto fail;
561f0ed4 2712 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2713 if (p == NULL) {
2714 nfserr = nfserr_toosmall;
1da177e4 2715 goto fail;
34081efc 2716 }
1da177e4 2717 }
561f0ed4
BF		 2718 nfserr = nfserr_toosmall;
2719 entry_bytes = xdr->buf->len - start_offset;
2720 if (entry_bytes > cd->rd_maxcount)
2721 goto fail;
2722 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2723 if (!cd->rd_dircount)
2724 goto fail;
2725 cd->rd_dircount--;
561f0ed4 2726 cd->cookie_offset = cookie_offset;
b2c0cea6 2727skip_entry:
1da177e4
LT		 2728 cd->common.err = nfs_ok;
2729 return 0;
2730fail:
561f0ed4 2731 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2732 cd->common.err = nfserr;
2733 return -EINVAL;
2734}
2735
d0a381dd
BF		 2736static __be32
2737nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2738{
bc749ca4 2739 __be32 *p;
e2f282b9 2740
d0a381dd
BF		 2741 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2742 if (!p)
2743 return nfserr_resource;
e2f282b9
BH		 2744 WRITE32(sid->si_generation);
2745 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
d0a381dd 2746 return 0;
e2f282b9
BH		 2747}
2748
695e12f8 2749static __be32
b37ad28b 2750nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2751{
d0a381dd 2752 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2753 __be32 *p;
1da177e4
LT		 2754
2755 if (!nfserr) {
d0a381dd
BF		 2756 p = xdr_reserve_space(xdr, 8);
2757 if (!p)
2758 return nfserr_resource;
1da177e4
LT		 2759 WRITE32(access->ac_supported);
2760 WRITE32(access->ac_resp_access);
1da177e4 2761 }
695e12f8 2762 return nfserr;
1da177e4
LT		 2763}
2764
1d1bc8f2
BF		 2765static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2766{
d0a381dd 2767 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2768 __be32 *p;
2769
2770 if (!nfserr) {
d0a381dd
BF		 2771 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2772 if (!p)
2773 return nfserr_resource;
1d1bc8f2
BF		 2774 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2775 WRITE32(bcts->dir);
6e67b5d1 2776 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2 2777 WRITE32(0);
1d1bc8f2
BF		 2778 }
2779 return nfserr;
2780}
2781
695e12f8 2782static __be32
b37ad28b 2783nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2784{
d0a381dd
BF		 2785 struct xdr_stream *xdr = &resp->xdr;
2786
e2f282b9 2787 if (!nfserr)
d0a381dd 2788 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2789
695e12f8 2790 return nfserr;
1da177e4
LT		 2791}
2792
2793
695e12f8 2794static __be32
b37ad28b 2795nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2796{
d0a381dd 2797 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2798 __be32 *p;
1da177e4
LT		 2799
2800 if (!nfserr) {
d0a381dd
BF		 2801 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2802 if (!p)
2803 return nfserr_resource;
ab4684d1 2804 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 2805 }
695e12f8 2806 return nfserr;
1da177e4
LT		 2807}
2808
695e12f8 2809static __be32
b37ad28b 2810nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2811{
d0a381dd 2812 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2813 __be32 *p;
1da177e4
LT		 2814
2815 if (!nfserr) {
d0a381dd
BF		 2816 p = xdr_reserve_space(xdr, 32);
2817 if (!p)
2818 return nfserr_resource;
c654b8a9 2819 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2820 WRITE32(2);
2821 WRITE32(create->cr_bmval[0]);
2822 WRITE32(create->cr_bmval[1]);
1da177e4 2823 }
695e12f8 2824 return nfserr;
1da177e4
LT		 2825}
2826
b37ad28b
AV		 2827static __be32
2828nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2829{
2830 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2831 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2832
2833 if (nfserr)
2834 return nfserr;
2835
d5184658
BF		 2836 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2837 getattr->ga_bmval,
406a7ea9 2838 resp->rqstp, 0);
1da177e4
LT		 2839 return nfserr;
2840}
2841
695e12f8
BH		 2842static __be32
2843nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2844{
d0a381dd 2845 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2846 struct svc_fh *fhp = *fhpp;
1da177e4 2847 unsigned int len;
bc749ca4 2848 __be32 *p;
1da177e4
LT		 2849
2850 if (!nfserr) {
2851 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2852 p = xdr_reserve_space(xdr, len + 4);
2853 if (!p)
2854 return nfserr_resource;
1da177e4
LT		 2855 WRITE32(len);
2856 WRITEMEM(&fhp->fh_handle.fh_base, len);
1da177e4 2857 }
695e12f8 2858 return nfserr;
1da177e4
LT		 2859}
2860
2861/*
2862* Including all fields other than the name, a LOCK4denied structure requires
2863* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2864*/
d0a381dd
BF		 2865static __be32
2866nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2867{
7c13f344 2868 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2869 __be32 *p;
1da177e4 2870
8c7424cf 2871again:
d0a381dd 2872 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2873 if (!p) {
2874 /*
2875 * Don't fail to return the result just because we can't
2876 * return the conflicting open:
2877 */
2878 if (conf->len) {
2879 conf->len = 0;
2880 conf->data = NULL;
2881 goto again;
2882 }
d0a381dd 2883 return nfserr_resource;
8c7424cf 2884 }
1da177e4
LT		 2885 WRITE64(ld->ld_start);
2886 WRITE64(ld->ld_length);
2887 WRITE32(ld->ld_type);
7c13f344 2888 if (conf->len) {
1da177e4 2889 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2890 WRITE32(conf->len);
2891 WRITEMEM(conf->data, conf->len);
1da177e4
LT		 2892 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2893 WRITE64((u64)0); /* clientid */
2894 WRITE32(0); /* length of owner name */
2895 }
d0a381dd 2896 return nfserr_denied;
1da177e4
LT		 2897}
2898
695e12f8 2899static __be32
b37ad28b 2900nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2901{
d0a381dd
BF		 2902 struct xdr_stream *xdr = &resp->xdr;
2903
e2f282b9 2904 if (!nfserr)
d0a381dd 2905 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2906 else if (nfserr == nfserr_denied)
d0a381dd 2907 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2908 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2909 return nfserr;
1da177e4
LT		 2910}
2911
695e12f8 2912static __be32
b37ad28b 2913nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2914{
d0a381dd
BF		 2915 struct xdr_stream *xdr = &resp->xdr;
2916
1da177e4 2917 if (nfserr == nfserr_denied)
d0a381dd 2918 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2919 return nfserr;
1da177e4
LT		 2920}
2921
695e12f8 2922static __be32
b37ad28b 2923nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2924{
d0a381dd
BF		 2925 struct xdr_stream *xdr = &resp->xdr;
2926
e2f282b9 2927 if (!nfserr)
d0a381dd 2928 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2929
695e12f8 2930 return nfserr;
1da177e4
LT		 2931}
2932
2933
695e12f8 2934static __be32
b37ad28b 2935nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2936{
d0a381dd 2937 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2938 __be32 *p;
1da177e4
LT		 2939
2940 if (!nfserr) {
d0a381dd
BF		 2941 p = xdr_reserve_space(xdr, 20);
2942 if (!p)
2943 return nfserr_resource;
c654b8a9 2944 write_cinfo(&p, &link->li_cinfo);
1da177e4 2945 }
695e12f8 2946 return nfserr;
1da177e4
LT		 2947}
2948
2949
695e12f8 2950static __be32
b37ad28b 2951nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2952{
d0a381dd 2953 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2954 __be32 *p;
1da177e4
LT		 2955
2956 if (nfserr)
2957 goto out;
2958
d0a381dd
BF		 2959 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2960 if (nfserr)
2961 goto out;
2962 p = xdr_reserve_space(xdr, 40);
2963 if (!p)
2964 return nfserr_resource;
c654b8a9 2965 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2966 WRITE32(open->op_rflags);
2967 WRITE32(2);
2968 WRITE32(open->op_bmval[0]);
2969 WRITE32(open->op_bmval[1]);
2970 WRITE32(open->op_delegate_type);
1da177e4
LT		 2971
2972 switch (open->op_delegate_type) {
2973 case NFS4_OPEN_DELEGATE_NONE:
2974 break;
2975 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2976 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2977 if (nfserr)
2978 return nfserr;
2979 p = xdr_reserve_space(xdr, 20);
2980 if (!p)
2981 return nfserr_resource;
7b190fec 2982 WRITE32(open->op_recall);
1da177e4
LT		 2983
2984 /*
2985 * TODO: ACE's in delegations
2986 */
2987 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2988 WRITE32(0);
2989 WRITE32(0);
2990 WRITE32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2991 break;
2992 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2993 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2994 if (nfserr)
2995 return nfserr;
2996 p = xdr_reserve_space(xdr, 32);
2997 if (!p)
2998 return nfserr_resource;
1da177e4
LT		 2999 WRITE32(0);
3000
3001 /*
3002 * TODO: space_limit's in delegations
3003 */
3004 WRITE32(NFS4_LIMIT_SIZE);
3005 WRITE32(~(u32)0);
3006 WRITE32(~(u32)0);
3007
3008 /*
3009 * TODO: ACE's in delegations
3010 */
3011 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3012 WRITE32(0);
3013 WRITE32(0);
3014 WRITE32(0); /* XXX: is NULL principal ok? */
1da177e4 3015 break;
d24433cd
BH		 3016 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3017 switch (open->op_why_no_deleg) {
3018 case WND4_CONTENTION:
3019 case WND4_RESOURCE:
d0a381dd
BF		 3020 p = xdr_reserve_space(xdr, 8);
3021 if (!p)
3022 return nfserr_resource;
d24433cd
BH		 3023 WRITE32(open->op_why_no_deleg);
3024 WRITE32(0); /* deleg signaling not supported yet */
3025 break;
3026 default:
d0a381dd
BF		 3027 p = xdr_reserve_space(xdr, 4);
3028 if (!p)
3029 return nfserr_resource;
d24433cd
BH		 3030 WRITE32(open->op_why_no_deleg);
3031 }
d24433cd 3032 break;
1da177e4
LT		 3033 default:
3034 BUG();
3035 }
3036 /* XXX save filehandle here */
3037out:
695e12f8 3038 return nfserr;
1da177e4
LT		 3039}
3040
695e12f8 3041static __be32
b37ad28b 3042nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3043{
d0a381dd
BF		 3044 struct xdr_stream *xdr = &resp->xdr;
3045
e2f282b9 3046 if (!nfserr)
d0a381dd 3047 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3048
695e12f8 3049 return nfserr;
1da177e4
LT		 3050}
3051
695e12f8 3052static __be32
b37ad28b 3053nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3054{
d0a381dd
BF		 3055 struct xdr_stream *xdr = &resp->xdr;
3056
e2f282b9 3057 if (!nfserr)
d0a381dd 3058 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3059
695e12f8 3060 return nfserr;
1da177e4
LT		 3061}
3062
b37ad28b
AV		 3063static __be32
3064nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 3065 struct nfsd4_read *read)
1da177e4
LT		 3066{
3067 u32 eof;
afc59400
BF		 3068 int v;
3069 struct page *page;
1da177e4 3070 unsigned long maxcount;
ddd1ea56 3071 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3072 int starting_len = xdr->buf->len;
30596768 3073 int space_left;
1da177e4 3074 long len;
bc749ca4 3075 __be32 *p;
1da177e4
LT		 3076
3077 if (nfserr)
3078 return nfserr;
1da177e4 3079
d0a381dd
BF		 3080 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3081 if (!p)
3082 return nfserr_resource;
1da177e4 3083
4e21ac4b
BF		 3084 /* Make sure there will be room for padding if needed: */
3085 if (xdr->end - xdr->p < 1)
3086 return nfserr_resource;
3087
2825a7f9
BF		 3088 if (resp->xdr.buf->page_len)
3089 return nfserr_resource;
3090
7adae489 3091 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 3092 if (maxcount > read->rd_length)
3093 maxcount = read->rd_length;
3094
3095 len = maxcount;
3096 v = 0;
6ff9897d
BF		 3097 while (len) {
3098 int thislen;
3099
afc59400
BF		 3100 page = *(resp->rqstp->rq_next_page);
3101 if (!page) { /* ran out of pages */
d5f50b0c
BF		 3102 maxcount -= len;
3103 break;
3104 }
6ff9897d 3105 thislen = min_t(long, len, PAGE_SIZE);
afc59400 3106 resp->rqstp->rq_vec[v].iov_base = page_address(page);
6ff9897d 3107 resp->rqstp->rq_vec[v].iov_len = thislen;
afc59400 3108 resp->rqstp->rq_next_page++;
1da177e4 3109 v++;
6ff9897d 3110 len -= thislen;
1da177e4
LT		 3111 }
3112 read->rd_vlen = v;
3113
039a87ca 3114 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 3115 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 3116 &maxcount);
3117
d3f627c8 3118 if (nfserr) {
1fcea5b2
BF		 3119 /*
3120 * nfsd_splice_actor may have already messed with the
3121 * page length; reset it so as not to confuse
3122 * xdr_truncate_encode:
3123 */
3124 xdr->buf->page_len = 0;
3125 xdr_truncate_encode(xdr, starting_len);
1da177e4 3126 return nfserr;
d3f627c8 3127 }
44524359
N		 3128 eof = (read->rd_offset + maxcount >=
3129 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 3130
3131 WRITE32(eof);
3132 WRITE32(maxcount);
6ac90391
BF		 3133 WARN_ON_ONCE(resp->xdr.buf->head[0].iov_len != (char *)p
3134 - (char *)resp->xdr.buf->head[0].iov_base);
4aea24b2 3135 resp->xdr.buf->page_len = maxcount;
6ac90391 3136 xdr->buf->len += maxcount;
2825a7f9 3137 xdr->page_ptr += v;
ddd1ea56 3138 xdr->iov = xdr->buf->tail;
1da177e4 3139
6ed6decc 3140 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3141 resp->xdr.buf->tail[0].iov_base = p;
3142 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3143 if (maxcount&3) {
d0a381dd 3144 p = xdr_reserve_space(xdr, 4);
6ed6decc 3145 WRITE32(0);
4aea24b2
BF		 3146 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3147 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
6ac90391 3148 xdr->buf->len -= (maxcount&3);
1da177e4 3149 }
30596768
BF		 3150
3151 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3152 xdr->buf->buflen - xdr->buf->len);
3153 xdr->buf->buflen = xdr->buf->len + space_left;
3154 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3155
1da177e4
LT		 3156 return 0;
3157}
3158
b37ad28b
AV		 3159static __be32
3160nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3161{
3162 int maxcount;
ddd1ea56 3163 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3164 char *page;
1fcea5b2 3165 int length_offset = xdr->buf->len;
bc749ca4 3166 __be32 *p;
1da177e4
LT		 3167
3168 if (nfserr)
3169 return nfserr;
2825a7f9
BF		 3170
3171 p = xdr_reserve_space(xdr, 4);
3172 if (!p)
3173 return nfserr_resource;
3174
4aea24b2 3175 if (resp->xdr.buf->page_len)
1da177e4 3176 return nfserr_resource;
afc59400 3177 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3178 return nfserr_resource;
1da177e4 3179
afc59400 3180 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3181
3182 maxcount = PAGE_SIZE;
d0a381dd 3183
4e21ac4b
BF		 3184 if (xdr->end - xdr->p < 1)
3185 return nfserr_resource;
3186
1da177e4
LT		 3187 /*
3188 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3189 * if they would overflow the buffer. Is this kosher in NFSv4? If
3190 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3191 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3192 */
3193 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3194 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3195 nfserr = nfserr_inval;
3196 if (nfserr) {
1fcea5b2 3197 xdr_truncate_encode(xdr, length_offset);
1da177e4 3198 return nfserr;
d3f627c8 3199 }
1da177e4
LT		 3200
3201 WRITE32(maxcount);
4aea24b2
BF		 3202 resp->xdr.buf->head[0].iov_len = (char *)p
3203 - (char *)resp->xdr.buf->head[0].iov_base;
3204 resp->xdr.buf->page_len = maxcount;
6ac90391 3205 xdr->buf->len += maxcount;
2825a7f9
BF		 3206 xdr->page_ptr += 1;
3207 xdr->buf->buflen -= PAGE_SIZE;
ddd1ea56 3208 xdr->iov = xdr->buf->tail;
1da177e4 3209
6ed6decc 3210 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3211 resp->xdr.buf->tail[0].iov_base = p;
3212 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3213 if (maxcount&3) {
d0a381dd 3214 p = xdr_reserve_space(xdr, 4);
6ed6decc 3215 WRITE32(0);
4aea24b2
BF		 3216 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3217 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
1da177e4
LT		 3218 }
3219 return 0;
3220}
3221
b37ad28b
AV		 3222static __be32
3223nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3224{
3225 int maxcount;
561f0ed4 3226 int bytes_left;
1da177e4 3227 loff_t offset;
561f0ed4 3228 __be64 wire_offset;
ddd1ea56 3229 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3230 int starting_len = xdr->buf->len;
bc749ca4 3231 __be32 *p;
1da177e4
LT		 3232
3233 if (nfserr)
3234 return nfserr;
1da177e4 3235
d0a381dd
BF		 3236 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3237 if (!p)
3238 return nfserr_resource;
1da177e4
LT		 3239
3240 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3241 WRITE32(0);
3242 WRITE32(0);
4aea24b2
BF		 3243 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3244 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3245
3246 /*
561f0ed4
BF		 3247 * Number of bytes left for directory entries allowing for the
3248 * final 8 bytes of the readdir and a following failed op:
3249 */
3250 bytes_left = xdr->buf->buflen - xdr->buf->len
3251 - COMPOUND_ERR_SLACK_SPACE - 8;
3252 if (bytes_left < 0) {
3253 nfserr = nfserr_resource;
3254 goto err_no_verf;
3255 }
3256 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3257 /*
3258 * Note the rfc defines rd_maxcount as the size of the
3259 * READDIR4resok structure, which includes the verifier above
3260 * and the 8 bytes encoded at the end of this function:
1da177e4 3261 */
561f0ed4
BF		 3262 if (maxcount < 16) {
3263 nfserr = nfserr_toosmall;
1da177e4
LT		 3264 goto err_no_verf;
3265 }
561f0ed4 3266 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3267
561f0ed4
BF		 3268 readdir->xdr = xdr;
3269 readdir->rd_maxcount = maxcount;
1da177e4 3270 readdir->common.err = 0;
561f0ed4 3271 readdir->cookie_offset = 0;
1da177e4
LT		 3272
3273 offset = readdir->rd_cookie;
3274 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3275 &offset,
3276 &readdir->common, nfsd4_encode_dirent);
3277 if (nfserr == nfs_ok &&
3278 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3279 xdr->buf->len == starting_len + 8) {
3280 /* nothing encoded; which limit did we hit?: */
3281 if (maxcount - 16 < bytes_left)
3282 /* It was the fault of rd_maxcount: */
3283 nfserr = nfserr_toosmall;
3284 else
3285 /* We ran out of buffer space: */
3286 nfserr = nfserr_resource;
3287 }
1da177e4
LT		 3288 if (nfserr)
3289 goto err_no_verf;
3290
561f0ed4
BF		 3291 if (readdir->cookie_offset) {
3292 wire_offset = cpu_to_be64(offset);
3293 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3294 &wire_offset, 8);
3295 }
1da177e4 3296
561f0ed4
BF		 3297 p = xdr_reserve_space(xdr, 8);
3298 if (!p) {
3299 WARN_ON_ONCE(1);
3300 goto err_no_verf;
3301 }
1da177e4
LT		 3302 *p++ = 0; /* no more entries */
3303 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3304
3305 return 0;
3306err_no_verf:
1fcea5b2 3307 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3308 return nfserr;
3309}
3310
695e12f8 3311static __be32
b37ad28b 3312nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3313{
d0a381dd 3314 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3315 __be32 *p;
1da177e4
LT		 3316
3317 if (!nfserr) {
d0a381dd
BF		 3318 p = xdr_reserve_space(xdr, 20);
3319 if (!p)
3320 return nfserr_resource;
c654b8a9 3321 write_cinfo(&p, &remove->rm_cinfo);
1da177e4 3322 }
695e12f8 3323 return nfserr;
1da177e4
LT		 3324}
3325
695e12f8 3326static __be32
b37ad28b 3327nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3328{
d0a381dd 3329 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3330 __be32 *p;
1da177e4
LT		 3331
3332 if (!nfserr) {
d0a381dd
BF		 3333 p = xdr_reserve_space(xdr, 40);
3334 if (!p)
3335 return nfserr_resource;
c654b8a9
BF		 3336 write_cinfo(&p, &rename->rn_sinfo);
3337 write_cinfo(&p, &rename->rn_tinfo);
1da177e4 3338 }
695e12f8 3339 return nfserr;
1da177e4
LT		 3340}
3341
695e12f8 3342static __be32
d0a381dd 3343nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3344 __be32 nfserr, struct svc_export *exp)
dcb488a3 3345{
676e4ebd 3346 u32 i, nflavs, supported;
4796f457
BF		 3347 struct exp_flavor_info *flavs;
3348 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3349 __be32 *p, *flavorsp;
3350 static bool report = true;
dcb488a3
AA		 3351
3352 if (nfserr)
3353 goto out;
d0a381dd 3354 nfserr = nfserr_resource;
4796f457
BF		 3355 if (exp->ex_nflavors) {
3356 flavs = exp->ex_flavors;
3357 nflavs = exp->ex_nflavors;
3358 } else { /* Handling of some defaults in absence of real secinfo: */
3359 flavs = def_flavs;
3360 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3361 nflavs = 2;
3362 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3363 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3364 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3365 nflavs = 1;
3366 flavs[0].pseudoflavor
3367 = svcauth_gss_flavor(exp->ex_client);
3368 } else {
3369 nflavs = 1;
3370 flavs[0].pseudoflavor
3371 = exp->ex_client->flavour->flavour;
3372 }
3373 }
3374
676e4ebd 3375 supported = 0;
d0a381dd
BF		 3376 p = xdr_reserve_space(xdr, 4);
3377 if (!p)
3378 goto out;
676e4ebd 3379 flavorsp = p++; /* to be backfilled later */
676e4ebd 3380
4796f457 3381 for (i = 0; i < nflavs; i++) {
676e4ebd 3382 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3383 struct rpcsec_gss_info info;
dcb488a3 3384
676e4ebd
CL		 3385 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3386 supported++;
d0a381dd
BF		 3387 p = xdr_reserve_space(xdr, 4 + 4 +
3388 XDR_LEN(info.oid.len) + 4 + 4);
3389 if (!p)
3390 goto out;
dcb488a3 3391 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3392 WRITE32(info.oid.len);
3393 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3394 WRITE32(info.qop);
a77c806f 3395 WRITE32(info.service);
676e4ebd
CL		 3396 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3397 supported++;
d0a381dd
BF		 3398 p = xdr_reserve_space(xdr, 4);
3399 if (!p)
3400 goto out;
676e4ebd 3401 WRITE32(pf);
676e4ebd
CL		 3402 } else {
3403 if (report)
3404 pr_warn("NFS: SECINFO: security flavor %u "
3405 "is not supported\n", pf);
dcb488a3
AA		 3406 }
3407 }
a77c806f 3408
676e4ebd
CL		 3409 if (nflavs != supported)
3410 report = false;
3411 *flavorsp = htonl(supported);
d0a381dd 3412 nfserr = 0;
dcb488a3
AA		 3413out:
3414 if (exp)
3415 exp_put(exp);
695e12f8 3416 return nfserr;
dcb488a3
AA		 3417}
3418
22b6dee8
MJ		 3419static __be32
3420nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3421 struct nfsd4_secinfo *secinfo)
3422{
d0a381dd
BF		 3423 struct xdr_stream *xdr = &resp->xdr;
3424
3425 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3426}
3427
3428static __be32
3429nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3430 struct nfsd4_secinfo_no_name *secinfo)
3431{
d0a381dd
BF		 3432 struct xdr_stream *xdr = &resp->xdr;
3433
3434 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3435}
3436
1da177e4
LT		 3437/*
3438 * The SETATTR encode routine is special -- it always encodes a bitmap,
3439 * regardless of the error status.
3440 */
695e12f8 3441static __be32
b37ad28b 3442nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3443{
d0a381dd 3444 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3445 __be32 *p;
1da177e4 3446
d0a381dd
BF		 3447 p = xdr_reserve_space(xdr, 16);
3448 if (!p)
3449 return nfserr_resource;
1da177e4 3450 if (nfserr) {
18032ca0
DQ		 3451 WRITE32(3);
3452 WRITE32(0);
1da177e4
LT		 3453 WRITE32(0);
3454 WRITE32(0);
3455 }
3456 else {
18032ca0 3457 WRITE32(3);
1da177e4
LT		 3458 WRITE32(setattr->sa_bmval[0]);
3459 WRITE32(setattr->sa_bmval[1]);
18032ca0 3460 WRITE32(setattr->sa_bmval[2]);
1da177e4 3461 }
695e12f8 3462 return nfserr;
1da177e4
LT		 3463}
3464
695e12f8 3465static __be32
b37ad28b 3466nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3467{
d0a381dd 3468 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3469 __be32 *p;
1da177e4
LT		 3470
3471 if (!nfserr) {
d0a381dd
BF		 3472 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3473 if (!p)
3474 return nfserr_resource;
1da177e4 3475 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3476 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3477 }
3478 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3479 p = xdr_reserve_space(xdr, 8);
3480 if (!p)
3481 return nfserr_resource;
1da177e4
LT		 3482 WRITE32(0);
3483 WRITE32(0);
1da177e4 3484 }
695e12f8 3485 return nfserr;
1da177e4
LT		 3486}
3487
695e12f8 3488static __be32
b37ad28b 3489nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3490{
d0a381dd 3491 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3492 __be32 *p;
1da177e4
LT		 3493
3494 if (!nfserr) {
d0a381dd
BF		 3495 p = xdr_reserve_space(xdr, 16);
3496 if (!p)
3497 return nfserr_resource;
1da177e4
LT		 3498 WRITE32(write->wr_bytes_written);
3499 WRITE32(write->wr_how_written);
ab4684d1 3500 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4 3501 }
695e12f8 3502 return nfserr;
1da177e4
LT		 3503}
3504
57266a6e
BF		 3505static const u32 nfs4_minimal_spo_must_enforce[2] = {
3506 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3507 1 << (OP_EXCHANGE_ID - 32) |
3508 1 << (OP_CREATE_SESSION - 32) |
3509 1 << (OP_DESTROY_SESSION - 32) |
3510 1 << (OP_DESTROY_CLIENTID - 32)
3511};
3512
2db134eb 3513static __be32
57b7b43b 3514nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3515 struct nfsd4_exchange_id *exid)
3516{
d0a381dd 3517 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3518 __be32 *p;
0733d213
AA		 3519 char *major_id;
3520 char *server_scope;
3521 int major_id_sz;
3522 int server_scope_sz;
3523 uint64_t minor_id = 0;
3524
3525 if (nfserr)
3526 return nfserr;
3527
3528 major_id = utsname()->nodename;
3529 major_id_sz = strlen(major_id);
3530 server_scope = utsname()->nodename;
3531 server_scope_sz = strlen(server_scope);
3532
d0a381dd 3533 p = xdr_reserve_space(xdr,
0733d213
AA		 3534 8 /* eir_clientid */ +
3535 4 /* eir_sequenceid */ +
3536 4 /* eir_flags */ +
a8bb84bc 3537 4 /* spr_how */);
d0a381dd
BF		 3538 if (!p)
3539 return nfserr_resource;
0733d213
AA		 3540
3541 WRITEMEM(&exid->clientid, 8);
3542 WRITE32(exid->seqid);
3543 WRITE32(exid->flags);
3544
0733d213 3545 WRITE32(exid->spa_how);
a8bb84bc 3546
57266a6e
BF		 3547 switch (exid->spa_how) {
3548 case SP4_NONE:
3549 break;
3550 case SP4_MACH_CRED:
a8bb84bc 3551 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3552 p = xdr_reserve_space(xdr, 16);
3553 if (!p)
3554 return nfserr_resource;
a8bb84bc 3555
57266a6e
BF		 3556 /* spo_must_enforce bitmap: */
3557 WRITE32(2);
3558 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3559 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3560 /* empty spo_must_allow bitmap: */
3561 WRITE32(0);
a8bb84bc 3562
57266a6e
BF		 3563 break;
3564 default:
3565 WARN_ON_ONCE(1);
3566 }
0733d213 3567
d0a381dd 3568 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3569 8 /* so_minor_id */ +
3570 4 /* so_major_id.len */ +
3571 (XDR_QUADLEN(major_id_sz) * 4) +
3572 4 /* eir_server_scope.len */ +
3573 (XDR_QUADLEN(server_scope_sz) * 4) +
3574 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3575 if (!p)
3576 return nfserr_resource;
a8bb84bc 3577
0733d213
AA		 3578 /* The server_owner struct */
3579 WRITE64(minor_id); /* Minor id */
3580 /* major id */
3581 WRITE32(major_id_sz);
3582 WRITEMEM(major_id, major_id_sz);
3583
3584 /* Server scope */
3585 WRITE32(server_scope_sz);
3586 WRITEMEM(server_scope, server_scope_sz);
3587
3588 /* Implementation id */
3589 WRITE32(0); /* zero length nfs_impl_id4 array */
0733d213 3590 return 0;
2db134eb
AA		 3591}
3592
3593static __be32
57b7b43b 3594nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3595 struct nfsd4_create_session *sess)
3596{
d0a381dd 3597 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3598 __be32 *p;
ec6b5d7b
AA		 3599
3600 if (nfserr)
3601 return nfserr;
3602
d0a381dd
BF		 3603 p = xdr_reserve_space(xdr, 24);
3604 if (!p)
3605 return nfserr_resource;
ec6b5d7b
AA		 3606 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3607 WRITE32(sess->seqid);
3608 WRITE32(sess->flags);
ec6b5d7b 3609
d0a381dd
BF		 3610 p = xdr_reserve_space(xdr, 28);
3611 if (!p)
3612 return nfserr_resource;
ec6b5d7b
AA		 3613 WRITE32(0); /* headerpadsz */
3614 WRITE32(sess->fore_channel.maxreq_sz);
3615 WRITE32(sess->fore_channel.maxresp_sz);
3616 WRITE32(sess->fore_channel.maxresp_cached);
3617 WRITE32(sess->fore_channel.maxops);
3618 WRITE32(sess->fore_channel.maxreqs);
3619 WRITE32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3620
3621 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3622 p = xdr_reserve_space(xdr, 4);
3623 if (!p)
3624 return nfserr_resource;
ec6b5d7b 3625 WRITE32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3626 }
3627
d0a381dd
BF		 3628 p = xdr_reserve_space(xdr, 28);
3629 if (!p)
3630 return nfserr_resource;
ec6b5d7b
AA		 3631 WRITE32(0); /* headerpadsz */
3632 WRITE32(sess->back_channel.maxreq_sz);
3633 WRITE32(sess->back_channel.maxresp_sz);
3634 WRITE32(sess->back_channel.maxresp_cached);
3635 WRITE32(sess->back_channel.maxops);
3636 WRITE32(sess->back_channel.maxreqs);
3637 WRITE32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3638
3639 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3640 p = xdr_reserve_space(xdr, 4);
3641 if (!p)
3642 return nfserr_resource;
ec6b5d7b 3643 WRITE32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3644 }
3645 return 0;
2db134eb
AA		 3646}
3647
c47d832b 3648static __be32
57b7b43b 3649nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3650 struct nfsd4_sequence *seq)
3651{
d0a381dd 3652 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3653 __be32 *p;
b85d4c01
BH		 3654
3655 if (nfserr)
3656 return nfserr;
3657
d0a381dd
BF		 3658 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3659 if (!p)
3660 return nfserr_resource;
b85d4c01
BH		 3661 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3662 WRITE32(seq->seqid);
3663 WRITE32(seq->slotid);
b7d7ca35
BF		 3664 /* Note slotid's are numbered from zero: */
3665 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3666 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3667 WRITE32(seq->status_flags);
b85d4c01 3668
f5236013 3669 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3670 return 0;
2db134eb
AA		 3671}
3672
2355c596 3673static __be32
57b7b43b 3674nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3675 struct nfsd4_test_stateid *test_stateid)
3676{
d0a381dd 3677 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3678 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3679 __be32 *p;
17456804 3680
a11fcce1
BF		 3681 if (nfserr)
3682 return nfserr;
3683
d0a381dd
BF		 3684 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3685 if (!p)
3686 return nfserr_resource;
17456804 3687 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3688
03cfb420 3689 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3690 *p++ = stateid->ts_id_status;
17456804 3691 }
17456804
BS		 3692
3693 return nfserr;
3694}
3695
695e12f8
BH		 3696static __be32
3697nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3698{
3699 return nfserr;
3700}
3701
3702typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3703
2db134eb
AA		 3704/*
3705 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3706 * since we don't need to filter out obsolete ops as this is
3707 * done in the decoding phase.
3708 */
695e12f8 3709static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3710 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3711 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3712 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3713 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3714 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3715 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3716 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3717 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3718 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3719 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3720 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3721 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3722 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3723 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3724 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3725 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3726 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3727 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3728 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3729 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3730 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3731 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3732 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3733 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3734 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3735 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3736 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3737 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3738 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3739 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3740 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3741 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3742 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3743 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3744 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3745 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3746 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3747
3748 /* NFSv4.1 operations */
3749 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3750 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3751 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3752 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3753 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3754 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3755 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3756 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3757 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3758 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3759 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3760 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3761 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3762 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3763 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3764 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3765 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3766 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3767 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3768};
3769
496c262c 3770/*
a8095f7e
BF		 3771 * Calculate whether we still have space to encode repsize bytes.
3772 * There are two considerations:
3773 * - For NFS versions >=4.1, the size of the reply must stay within
3774 * session limits
3775 * - For all NFS versions, we must stay within limited preallocated
3776 * buffer space.
496c262c 3777 *
a8095f7e
BF		 3778 * This is called before the operation is processed, so can only provide
3779 * an upper estimate. For some nonidempotent operations (such as
3780 * getattr), it's not necessarily a problem if that estimate is wrong,
3781 * as we can fail it after processing without significant side effects.
496c262c 3782 */
a8095f7e 3783__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3784{
67492c99 3785 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3786 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3787
47ee5298
BF		 3788 if (buf->len + respsize <= buf->buflen)
3789 return nfs_ok;
3790 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3791 return nfserr_resource;
47ee5298
BF		 3792 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3793 WARN_ON_ONCE(1);
3794 return nfserr_rep_too_big_to_cache;
ea8d7720 3795 }
47ee5298 3796 return nfserr_rep_too_big;
496c262c
AA		 3797}
3798
1da177e4
LT		 3799void
3800nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3801{
082d4bd7 3802 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3803 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3804 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3805 int post_err_offset;
07d1f802 3806 nfsd4_enc encoder;
bc749ca4 3807 __be32 *p;
1da177e4 3808
d0a381dd
BF		 3809 p = xdr_reserve_space(xdr, 8);
3810 if (!p) {
3811 WARN_ON_ONCE(1);
3812 return;
3813 }
1da177e4 3814 WRITE32(op->opnum);
082d4bd7 3815 post_err_offset = xdr->buf->len;
1da177e4 3816
695e12f8
BH		 3817 if (op->opnum == OP_ILLEGAL)
3818 goto status;
3819 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3820 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3821 encoder = nfsd4_enc_ops[op->opnum];
3822 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3823 xdr_commit_encode(xdr);
3824
067e1ace 3825 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3826 if (!op->status) {
3827 int space_needed = 0;
3828 if (!nfsd4_last_compound_op(rqstp))
3829 space_needed = COMPOUND_ERR_SLACK_SPACE;
3830 op->status = nfsd4_check_resp_size(resp, space_needed);
3831 }
07d1f802
BF		 3832 if (op->status == nfserr_resource ||
3833 op->status == nfserr_rep_too_big ||
3834 op->status == nfserr_rep_too_big_to_cache) {
3835 /*
3836 * The operation may have already been encoded or
3837 * partially encoded. No op returns anything additional
3838 * in the case of one of these three errors, so we can
3839 * just truncate back to after the status. But it's a
3840 * bug if we had to do this on a non-idempotent op:
3841 */
3842 warn_on_nonidempotent_op(op);
082d4bd7 3843 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3844 }
9411b1d4 3845 if (so) {
082d4bd7
BF		 3846 int len = xdr->buf->len - post_err_offset;
3847
9411b1d4 3848 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3849 so->so_replay.rp_buflen = len;
3850 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3851 so->so_replay.rp_buf, len);
9411b1d4 3852 }
695e12f8 3853status:
082d4bd7
BF		 3854 /* Note that op->status is already in network byte order: */
3855 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3856}
3857
3858/*
3859 * Encode the reply stored in the stateowner reply cache
3860 *
3861 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3862 * previously sent already encoded operation.
3863 *
3864 * called with nfs4_lock_state() held
3865 */
3866void
d0a381dd 3867nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3868{
bc749ca4 3869 __be32 *p;
1da177e4
LT		 3870 struct nfs4_replay *rp = op->replay;
3871
3872 BUG_ON(!rp);
3873
d0a381dd
BF		 3874 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3875 if (!p) {
3876 WARN_ON_ONCE(1);
3877 return;
3878 }
1da177e4
LT		 3879 WRITE32(op->opnum);
3880 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3881
1da177e4 3882 WRITEMEM(rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3883}
3884
1da177e4 3885int
2ebbc012 3886nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3887{
3888 return xdr_ressize_check(rqstp, p);
3889}
3890
3e98abff 3891int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3892{
3e98abff
BF		 3893 struct svc_rqst *rqstp = rq;
3894 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3895
1da177e4
LT		 3896 if (args->ops != args->iops) {
3897 kfree(args->ops);
3898 args->ops = args->iops;
3899 }
f99d49ad
JJ		 3900 kfree(args->tmpp);
3901 args->tmpp = NULL;
1da177e4
LT		 3902 while (args->to_free) {
3903 struct tmpbuf *tb = args->to_free;
3904 args->to_free = tb->next;
3905 tb->release(tb->buf);
3906 kfree(tb);
3907 }
3e98abff 3908 return 1;
1da177e4
LT		 3909}
3910
3911int
2ebbc012 3912nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3913{
e874f9f8
JL		 3914 if (rqstp->rq_arg.head[0].iov_len % 4) {
3915 /* client is nuts */
3916 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3917 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3918 return 0;
3919 }
1da177e4
LT		 3920 args->p = p;
3921 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3922 args->pagelist = rqstp->rq_arg.pages;
3923 args->pagelen = rqstp->rq_arg.page_len;
3924 args->tmpp = NULL;
3925 args->to_free = NULL;
3926 args->ops = args->iops;
3927 args->rqstp = rqstp;
3928
3e98abff 3929 return !nfsd4_decode_compound(args);
1da177e4
LT		 3930}
3931
3932int
2ebbc012 3933nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3934{
3935 /*
3936 * All that remains is to write the tag and operation count...
3937 */
557ce264 3938 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 3939 struct xdr_buf *buf = resp->xdr.buf;
3940
3941 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
3942 buf->tail[0].iov_len);
dd97fdde 3943
2825a7f9
BF		 3944 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
3945
1da177e4
LT		 3946 p = resp->tagp;
3947 *p++ = htonl(resp->taglen);
3948 memcpy(p, resp->tag, resp->taglen);
3949 p += XDR_QUADLEN(resp->taglen);
3950 *p++ = htonl(resp->opcnt);
3951
26c0c75e 3952 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 3953 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3954 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 3955 if (cs->status != nfserr_replay_cache) {
3956 nfsd4_store_cache_entry(resp);
73e79482 3957 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3958 }
d7682988 3959 /* Renew the clientid on success and on replay */
f0f51f5c 3960 spin_lock(&nn->client_lock);
221a6876 3961 nfsd4_put_session(cs->session);
f0f51f5c
BF		 3962 spin_unlock(&nn->client_lock);
3963 put_client_renew(clp);
da3846a2 3964 }
1da177e4
LT		 3965 return 1;
3966}
3967
3968/*
3969 * Local variables:
3970 * c-basic-offset: 8
3971 * End:
3972 */
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