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nfsd4: encode_rdattr_error cleanup
[linux-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
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
BF		 296 if (nace > NFS4_ACL_MAX)
297 return nfserr_resource;
298
299 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 300 if (*acl == NULL)
301 return nfserr_jukebox;
302
28e05dd8 303 defer_free(argp, kfree, *acl);
1da177e4 304
28e05dd8
BF		 305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 307 READ_BUF(16); len += 16;
28e05dd8
BF		 308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
1da177e4
LT		 311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
28e05dd8 315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 316 status = nfs_ok;
28e05dd8 317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 318 ;
28e05dd8 319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 320 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 321 buf, dummy32, &ace->who_gid);
1da177e4 322 else
3c726023 323 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_uid);
3c726023
BF		 325 if (status)
326 return status;
1da177e4
LT		 327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
47c85291
N		 344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
1da177e4
LT		 346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
47c85291
N		 355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
1da177e4
LT		 357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
bf8d9097 369 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
1da177e4
LT		 382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
bf8d9097 392 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
18032ca0
DQ		 405
406 label->len = 0;
407#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
3378b7f4 426 label->len = dummy32;
18032ca0
DQ		 427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430#endif
431
3c8e0316
YZ		 432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
1da177e4
LT		 437 goto xdr_error;
438
439 DECODE_TAIL;
1da177e4
LT		 440}
441
e31a1b66
BH		 442static __be32
443nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444{
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463}
464
acb2887e
BF		 465static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466{
467 DECODE_HEAD;
12fc3e92 468 u32 dummy, uid, gid;
acb2887e
BF		 469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
57569a70
BF		 476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
acb2887e
BF		 481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
12fc3e92
BF		 487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
12fc3e92
BF		 502 READ32(uid);
503 READ32(gid);
acb2887e
BF		 504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
12fc3e92 509 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
12fc3e92 520 }
acb2887e
BF		 521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543}
544
cb73a9f4
BF		 545static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546{
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554}
555
1d1bc8f2
BF		 556static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557{
558 DECODE_HEAD;
1d1bc8f2
BF		 559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
6ce2357f
BS		 563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
1d1bc8f2
BF		 565 DECODE_TAIL;
566}
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570{
571 DECODE_HEAD;
572
e31a1b66 573 READ_BUF(4);
1da177e4 574 READ32(close->cl_seqid);
e31a1b66 575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 576
577 DECODE_TAIL;
578}
579
580
b37ad28b 581static __be32
1da177e4
LT		 582nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583{
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591}
592
b37ad28b 593static __be32
1da177e4
LT		 594nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595{
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 625 return status;
626
3c8e0316 627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 628 &create->cr_acl, &create->cr_label);
c0d6fc8a 629 if (status)
1da177e4
LT		 630 goto out;
631
632 DECODE_TAIL;
633}
634
b37ad28b 635static inline __be32
1da177e4
LT		 636nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637{
e31a1b66 638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 639}
640
b37ad28b 641static inline __be32
1da177e4
LT		 642nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643{
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 656 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 657 return status;
658
659 DECODE_TAIL;
660}
661
b37ad28b 662static __be32
1da177e4
LT		 663nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664{
665 DECODE_HEAD;
666
1da177e4
LT		 667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
e31a1b66 680 READ_BUF(4);
1da177e4 681 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
e31a1b66
BH		 692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
1da177e4
LT		 696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700}
701
b37ad28b 702static __be32
1da177e4
LT		 703nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704{
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723{
724 DECODE_HEAD;
725
e31a1b66 726 READ_BUF(8);
1da177e4
LT		 727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
1da177e4
LT		 735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743{
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 751 return status;
752
753 DECODE_TAIL;
754}
755
2c8bd7e0 756static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 757{
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
2c8bd7e0
BH		 763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
04f9e664
BF		 768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
fc0d14fe 776 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
92bac8c5 792 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 793 if (!w)
794 return nfs_ok;
2c8bd7e0
BH		 795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
04f9e664
BF		 798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 803 return nfs_ok;
804 }
805xdr_error:
806 return nfserr_bad_xdr;
807}
808
809static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810{
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 816 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 817 return nfserr_bad_xdr;
818 return nfs_ok;
819xdr_error:
820 return nfserr_bad_xdr;
821}
822
a084daf5
BF		 823static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824{
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836xdr_error:
837 return nfserr_bad_xdr;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842{
843 DECODE_HEAD;
2c8bd7e0 844 u32 dummy;
1da177e4
LT		 845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
fe0750e5 848 open->op_openowner = NULL;
1da177e4 849
9d313b17 850 open->op_xdr_error = 0;
1da177e4 851 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 852 READ_BUF(4);
1da177e4 853 READ32(open->op_seqid);
2c8bd7e0
BH		 854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
04f9e664
BF		 857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
a084daf5 862 READ_BUF(sizeof(clientid_t));
1da177e4 863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
1da177e4
LT		 868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
c0d6fc8a 878 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 879 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 880 if (status)
1da177e4
LT		 881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 886 break;
79fb54ab
BH		 887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
ab4684d1
CL		 890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 892 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 893 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 894 if (status)
895 goto out;
896 break;
1da177e4
LT		 897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
1da177e4
LT		 927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 931 return status;
932 break;
8b289b2c
BF		 933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
1da177e4
LT		 946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951}
952
b37ad28b 953static __be32
1da177e4
LT		 954nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955{
956 DECODE_HEAD;
e1a90ebd
AS		 957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
e31a1b66
BH		 961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
1da177e4 965 READ32(open_conf->oc_seqid);
e1a90ebd 966
1da177e4
LT		 967 DECODE_TAIL;
968}
969
b37ad28b 970static __be32
1da177e4
LT		 971nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972{
973 DECODE_HEAD;
974
e31a1b66
BH		 975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
04f9e664 978 READ_BUF(4);
1da177e4 979 READ32(open_down->od_seqid);
2c8bd7e0
BH		 980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
04f9e664
BF		 982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
1da177e4
LT		 987 DECODE_TAIL;
988}
989
b37ad28b 990static __be32
1da177e4
LT		 991nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992{
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003}
1004
e1a90ebd
AS		 1005static __be32
1006nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007{
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011}
1012
b37ad28b 1013static __be32
1da177e4
LT		 1014nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015{
1016 DECODE_HEAD;
1017
e31a1b66
BH		 1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1da177e4
LT		 1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1036 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042}
1043
b37ad28b 1044static __be32
1da177e4
LT		 1045nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046{
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1054 return status;
1055
1056 DECODE_TAIL;
1057}
1058
b37ad28b 1059static __be32
1da177e4
LT		 1060nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061{
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1072 return status;
a36b1725 1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1074 return status;
1075
1076 DECODE_TAIL;
1077}
1078
b37ad28b 1079static __be32
1da177e4
LT		 1080nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081{
1082 DECODE_HEAD;
1083
e1a90ebd
AS		 1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1da177e4
LT		 1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091}
1092
dcb488a3
AA		 1093static __be32
1094nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096{
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107}
1108
04f4ad16
BF		 1109static __be32
1110nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112{
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118}
1119
b37ad28b 1120static __be32
1da177e4
LT		 1121nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122{
e31a1b66 1123 __be32 status;
1da177e4 1124
e31a1b66
BH		 1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
3c8e0316 1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1129 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1130}
1131
b37ad28b 1132static __be32
1da177e4
LT		 1133nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134{
1135 DECODE_HEAD;
1136
e1a90ebd
AS		 1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
ab4684d1
CL		 1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1142
a084daf5
BF		 1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1da177e4
LT		 1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159}
1160
b37ad28b 1161static __be32
1da177e4
LT		 1162nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163{
1164 DECODE_HEAD;
1165
e1a90ebd
AS		 1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
ab4684d1 1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1170 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1172
1173 DECODE_TAIL;
1174}
1175
1176/* Also used for NVERIFY */
b37ad28b 1177static __be32
1da177e4
LT		 1178nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179{
1da177e4
LT		 1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1186 * nfsd4_proc_verify */
1187
1da177e4
LT		 1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194}
1195
b37ad28b 1196static __be32
1da177e4
LT		 1197nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198{
1199 int avail;
1da177e4
LT		 1200 int len;
1201 DECODE_HEAD;
1202
e31a1b66
BH		 1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1da177e4
LT		 1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1da177e4
LT		 1221 goto xdr_error;
1222 }
70cc7f75
BF		 1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
5a80a54d 1225 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1226 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1227
1228 len = XDR_QUADLEN(write->wr_buflen) << 2;
1229 if (len >= avail) {
1230 int pages;
1231
1232 len -= avail;
1233
1234 pages = len >> PAGE_SHIFT;
1235 argp->pagelist += pages;
1236 argp->pagelen -= pages * PAGE_SIZE;
1237 len -= pages * PAGE_SIZE;
1238
1239 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1240 argp->pagelist++;
5a80a54d 1241 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1242 }
5a80a54d 1243 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1244
1245 DECODE_TAIL;
1246}
1247
b37ad28b 1248static __be32
1da177e4
LT		 1249nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1250{
1251 DECODE_HEAD;
1252
e1a90ebd
AS		 1253 if (argp->minorversion >= 1)
1254 return nfserr_notsupp;
1255
1da177e4
LT		 1256 READ_BUF(12);
1257 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1258 READ32(rlockowner->rl_owner.len);
1259 READ_BUF(rlockowner->rl_owner.len);
1260 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1261
60adfc50
AA		 1262 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1263 return nfserr_inval;
1da177e4
LT		 1264 DECODE_TAIL;
1265}
1266
2db134eb
AA		 1267static __be32
1268nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1269 struct nfsd4_exchange_id *exid)
2db134eb 1270{
5afa040b 1271 int dummy, tmp;
0733d213
AA		 1272 DECODE_HEAD;
1273
1274 READ_BUF(NFS4_VERIFIER_SIZE);
1275 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1276
a084daf5
BF		 1277 status = nfsd4_decode_opaque(argp, &exid->clname);
1278 if (status)
1279 return nfserr_bad_xdr;
0733d213
AA		 1280
1281 READ_BUF(4);
1282 READ32(exid->flags);
1283
1284 /* Ignore state_protect4_a */
1285 READ_BUF(4);
1286 READ32(exid->spa_how);
1287 switch (exid->spa_how) {
1288 case SP4_NONE:
1289 break;
1290 case SP4_MACH_CRED:
1291 /* spo_must_enforce */
1292 READ_BUF(4);
1293 READ32(dummy);
1294 READ_BUF(dummy * 4);
1295 p += dummy;
1296
1297 /* spo_must_allow */
1298 READ_BUF(4);
1299 READ32(dummy);
1300 READ_BUF(dummy * 4);
1301 p += dummy;
1302 break;
1303 case SP4_SSV:
1304 /* ssp_ops */
1305 READ_BUF(4);
1306 READ32(dummy);
1307 READ_BUF(dummy * 4);
1308 p += dummy;
1309
1310 READ_BUF(4);
1311 READ32(dummy);
1312 READ_BUF(dummy * 4);
1313 p += dummy;
1314
1315 /* ssp_hash_algs<> */
1316 READ_BUF(4);
5afa040b
MJ		 1317 READ32(tmp);
1318 while (tmp--) {
1319 READ_BUF(4);
1320 READ32(dummy);
1321 READ_BUF(dummy);
1322 p += XDR_QUADLEN(dummy);
1323 }
0733d213
AA		 1324
1325 /* ssp_encr_algs<> */
1326 READ_BUF(4);
5afa040b
MJ		 1327 READ32(tmp);
1328 while (tmp--) {
1329 READ_BUF(4);
1330 READ32(dummy);
1331 READ_BUF(dummy);
1332 p += XDR_QUADLEN(dummy);
1333 }
0733d213
AA		 1334
1335 /* ssp_window and ssp_num_gss_handles */
1336 READ_BUF(8);
1337 READ32(dummy);
1338 READ32(dummy);
1339 break;
1340 default:
1341 goto xdr_error;
1342 }
1343
1344 /* Ignore Implementation ID */
1345 READ_BUF(4); /* nfs_impl_id4 array length */
1346 READ32(dummy);
1347
1348 if (dummy > 1)
1349 goto xdr_error;
1350
1351 if (dummy == 1) {
1352 /* nii_domain */
1353 READ_BUF(4);
1354 READ32(dummy);
1355 READ_BUF(dummy);
1356 p += XDR_QUADLEN(dummy);
1357
1358 /* nii_name */
1359 READ_BUF(4);
1360 READ32(dummy);
1361 READ_BUF(dummy);
1362 p += XDR_QUADLEN(dummy);
1363
1364 /* nii_date */
1365 READ_BUF(12);
1366 p += 3;
1367 }
1368 DECODE_TAIL;
2db134eb
AA		 1369}
1370
1371static __be32
1372nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1373 struct nfsd4_create_session *sess)
1374{
ec6b5d7b 1375 DECODE_HEAD;
ec6b5d7b 1376 u32 dummy;
ec6b5d7b
AA		 1377
1378 READ_BUF(16);
1379 COPYMEM(&sess->clientid, 8);
1380 READ32(sess->seqid);
1381 READ32(sess->flags);
1382
1383 /* Fore channel attrs */
1384 READ_BUF(28);
1385 READ32(dummy); /* headerpadsz is always 0 */
1386 READ32(sess->fore_channel.maxreq_sz);
1387 READ32(sess->fore_channel.maxresp_sz);
1388 READ32(sess->fore_channel.maxresp_cached);
1389 READ32(sess->fore_channel.maxops);
1390 READ32(sess->fore_channel.maxreqs);
1391 READ32(sess->fore_channel.nr_rdma_attrs);
1392 if (sess->fore_channel.nr_rdma_attrs == 1) {
1393 READ_BUF(4);
1394 READ32(sess->fore_channel.rdma_attrs);
1395 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1396 dprintk("Too many fore channel attr bitmaps!\n");
1397 goto xdr_error;
1398 }
1399
1400 /* Back channel attrs */
1401 READ_BUF(28);
1402 READ32(dummy); /* headerpadsz is always 0 */
1403 READ32(sess->back_channel.maxreq_sz);
1404 READ32(sess->back_channel.maxresp_sz);
1405 READ32(sess->back_channel.maxresp_cached);
1406 READ32(sess->back_channel.maxops);
1407 READ32(sess->back_channel.maxreqs);
1408 READ32(sess->back_channel.nr_rdma_attrs);
1409 if (sess->back_channel.nr_rdma_attrs == 1) {
1410 READ_BUF(4);
1411 READ32(sess->back_channel.rdma_attrs);
1412 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1413 dprintk("Too many back channel attr bitmaps!\n");
1414 goto xdr_error;
1415 }
1416
acb2887e 1417 READ_BUF(4);
ec6b5d7b 1418 READ32(sess->callback_prog);
acb2887e 1419 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1420 DECODE_TAIL;
2db134eb
AA		 1421}
1422
1423static __be32
1424nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1425 struct nfsd4_destroy_session *destroy_session)
1426{
e10e0cfc
BH		 1427 DECODE_HEAD;
1428 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1429 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1430
1431 DECODE_TAIL;
2db134eb
AA		 1432}
1433
e1ca12df
BS		 1434static __be32
1435nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1436 struct nfsd4_free_stateid *free_stateid)
1437{
1438 DECODE_HEAD;
1439
1440 READ_BUF(sizeof(stateid_t));
1441 READ32(free_stateid->fr_stateid.si_generation);
1442 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1443
1444 DECODE_TAIL;
1445}
1446
2db134eb
AA		 1447static __be32
1448nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1449 struct nfsd4_sequence *seq)
1450{
b85d4c01
BH		 1451 DECODE_HEAD;
1452
1453 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1454 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1455 READ32(seq->seqid);
1456 READ32(seq->slotid);
1457 READ32(seq->maxslots);
1458 READ32(seq->cachethis);
1459
1460 DECODE_TAIL;
2db134eb
AA		 1461}
1462
17456804
BS		 1463static __be32
1464nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1465{
17456804 1466 int i;
03cfb420
BS		 1467 __be32 *p, status;
1468 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1469
1470 READ_BUF(4);
1471 test_stateid->ts_num_ids = ntohl(*p++);
1472
03cfb420 1473 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1474
1475 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1476 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1477 if (!stateid) {
afcf6792 1478 status = nfserrno(-ENOMEM);
03cfb420
BS		 1479 goto out;
1480 }
1481
1482 defer_free(argp, kfree, stateid);
1483 INIT_LIST_HEAD(&stateid->ts_id_list);
1484 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1485
1486 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1487 if (status)
03cfb420 1488 goto out;
17456804
BS		 1489 }
1490
1491 status = 0;
1492out:
1493 return status;
1494xdr_error:
1495 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1496 status = nfserr_bad_xdr;
1497 goto out;
1498}
1499
345c2842
MJ		 1500static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1501{
1502 DECODE_HEAD;
1503
1504 READ_BUF(8);
1505 COPYMEM(&dc->clientid, 8);
1506
1507 DECODE_TAIL;
1508}
1509
4dc6ec00
BF		 1510static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1511{
1512 DECODE_HEAD;
1513
1514 READ_BUF(4);
1515 READ32(rc->rca_one_fs);
1516
1517 DECODE_TAIL;
1518}
1519
347e0ad9
BH		 1520static __be32
1521nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1522{
1523 return nfs_ok;
1524}
1525
3c375c6f
BH		 1526static __be32
1527nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1528{
1e685ec2 1529 return nfserr_notsupp;
3c375c6f
BH		 1530}
1531
347e0ad9
BH		 1532typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1533
1534static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1535 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1536 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1537 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1538 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1539 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1540 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1541 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1542 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1543 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1544 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1545 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1546 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1547 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1548 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1549 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1550 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1551 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1552 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1553 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1554 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1555 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1556 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1557 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1558 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1559 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1560 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1561 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1562 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1563 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1565 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1566 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1567 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1568 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1569 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1570 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1571 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1572
1573 /* new operations for NFSv4.1 */
cb73a9f4 1574 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1575 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1576 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1577 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1578 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1579 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1580 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1586 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1587 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1588 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1589 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1590 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1591 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1592 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1593};
1594
e1a90ebd
AS		 1595static inline bool
1596nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1597{
8217d146 1598 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1599 return false;
8217d146 1600 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1601 return false;
8217d146
AS		 1602 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1603 return false;
1604 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1605 return false;
1606 return true;
1607}
f2feb96b 1608
6ff40dec
BF		 1609/*
1610 * Return a rough estimate of the maximum possible reply size. Note the
1611 * estimate includes rpc headers so is meant to be passed to
1612 * svc_reserve, not svc_reserve_auth.
1613 *
1614 * Also note the current compound encoding permits only one operation to
1615 * use pages beyond the first one, so the maximum possible length is the
1616 * maximum over these values, not the sum.
1617 */
1618static int nfsd4_max_reply(u32 opnum)
1619{
1620 switch (opnum) {
1621 case OP_READLINK:
1622 case OP_READDIR:
1623 /*
1624 * Both of these ops take a single page for data and put
1625 * the head and tail in another page:
1626 */
1627 return 2 * PAGE_SIZE;
1628 case OP_READ:
1629 return INT_MAX;
1630 default:
1631 return PAGE_SIZE;
1632 }
1633}
1634
b37ad28b 1635static __be32
1da177e4
LT		 1636nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1637{
1638 DECODE_HEAD;
1639 struct nfsd4_op *op;
1091006c 1640 bool cachethis = false;
6ff40dec 1641 int max_reply = PAGE_SIZE;
1da177e4
LT		 1642 int i;
1643
1da177e4
LT		 1644 READ_BUF(4);
1645 READ32(argp->taglen);
1646 READ_BUF(argp->taglen + 8);
1647 SAVEMEM(argp->tag, argp->taglen);
1648 READ32(argp->minorversion);
1649 READ32(argp->opcnt);
1650
1651 if (argp->taglen > NFSD4_MAX_TAGLEN)
1652 goto xdr_error;
1653 if (argp->opcnt > 100)
1654 goto xdr_error;
1655
e8c96f8c 1656 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1657 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1658 if (!argp->ops) {
1659 argp->ops = argp->iops;
817cb9d4 1660 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1661 goto xdr_error;
1662 }
1663 }
1664
e1a90ebd 1665 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1666 argp->opcnt = 0;
1667
1da177e4
LT		 1668 for (i = 0; i < argp->opcnt; i++) {
1669 op = &argp->ops[i];
1670 op->replay = NULL;
1671
8a61b18c
BF		 1672 READ_BUF(4);
1673 READ32(op->opnum);
1da177e4 1674
e1a90ebd
AS		 1675 if (nfsd4_opnum_in_range(argp, op))
1676 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1677 else {
1da177e4
LT		 1678 op->opnum = OP_ILLEGAL;
1679 op->status = nfserr_op_illegal;
1da177e4
LT		 1680 }
1681
1682 if (op->status) {
1683 argp->opcnt = i+1;
1684 break;
1685 }
1091006c
BF		 1686 /*
1687 * We'll try to cache the result in the DRC if any one
1688 * op in the compound wants to be cached:
1689 */
1690 cachethis |= nfsd4_cache_this_op(op);
6ff40dec
BF		 1691
1692 max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
1da177e4 1693 }
1091006c
BF		 1694 /* Sessions make the DRC unnecessary: */
1695 if (argp->minorversion)
1696 cachethis = false;
6ff40dec
BF		 1697 if (max_reply != INT_MAX)
1698 svc_reserve(argp->rqstp, max_reply);
1091006c 1699 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1700
1701 DECODE_TAIL;
1702}
1da177e4 1703
1da177e4
LT		 1704#define WRITE32(n) *p++ = htonl(n)
1705#define WRITE64(n) do { \
1706 *p++ = htonl((u32)((n) >> 32)); \
1707 *p++ = htonl((u32)(n)); \
1708} while (0)
5108b276 1709#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1710 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1711 memcpy(p, ptr, nbytes); \
1712 p += XDR_QUADLEN(nbytes); \
5108b276 1713}} while (0)
c654b8a9
BF		 1714
1715static void write32(__be32 **p, u32 n)
1716{
45eaa1c1 1717 *(*p)++ = htonl(n);
c654b8a9
BF		 1718}
1719
1720static void write64(__be32 **p, u64 n)
1721{
45eaa1c1 1722 write32(p, (n >> 32));
c654b8a9
BF		 1723 write32(p, (u32)n);
1724}
1725
1726static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1727{
1728 if (IS_I_VERSION(inode)) {
1729 write64(p, inode->i_version);
1730 } else {
1731 write32(p, stat->ctime.tv_sec);
1732 write32(p, stat->ctime.tv_nsec);
1733 }
1734}
1735
1736static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1737{
1738 write32(p, c->atomic);
1739 if (c->change_supported) {
1740 write64(p, c->before_change);
1741 write64(p, c->after_change);
1742 } else {
1743 write32(p, c->before_ctime_sec);
1744 write32(p, c->before_ctime_nsec);
1745 write32(p, c->after_ctime_sec);
1746 write32(p, c->after_ctime_nsec);
1747 }
1748}
1da177e4
LT		 1749
1750#define RESERVE_SPACE(nbytes) do { \
1751 p = resp->p; \
1752 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1753} while (0)
1754#define ADJUST_ARGS() resp->p = p
1755
81c3f413 1756/* Encode as an array of strings the string given with components
e7a0444a 1757 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1758 */
e7a0444a
WAA		 1759static __be32 nfsd4_encode_components_esc(char sep, char *components,
1760 __be32 **pp, int *buflen,
1761 char esc_enter, char esc_exit)
81c3f413 1762{
2ebbc012
AV		 1763 __be32 *p = *pp;
1764 __be32 *countp = p;
81c3f413 1765 int strlen, count=0;
e7a0444a 1766 char *str, *end, *next;
81c3f413
BF		 1767
1768 dprintk("nfsd4_encode_components(%s)\n", components);
1769 if ((*buflen -= 4) < 0)
1770 return nfserr_resource;
1771 WRITE32(0); /* We will fill this in with @count later */
1772 end = str = components;
1773 while (*end) {
e7a0444a
WAA		 1774 bool found_esc = false;
1775
1776 /* try to parse as esc_start, ..., esc_end, sep */
1777 if (*str == esc_enter) {
1778 for (; *end && (*end != esc_exit); end++)
1779 /* find esc_exit or end of string */;
1780 next = end + 1;
1781 if (*end && (!*next || *next == sep)) {
1782 str++;
1783 found_esc = true;
1784 }
1785 }
1786
1787 if (!found_esc)
1788 for (; *end && (*end != sep); end++)
1789 /* find sep or end of string */;
1790
81c3f413
BF		 1791 strlen = end - str;
1792 if (strlen) {
1793 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1794 return nfserr_resource;
1795 WRITE32(strlen);
1796 WRITEMEM(str, strlen);
1797 count++;
1798 }
1799 else
1800 end++;
1801 str = end;
1802 }
1803 *pp = p;
1804 p = countp;
1805 WRITE32(count);
1806 return 0;
1807}
1808
e7a0444a
WAA		 1809/* Encode as an array of strings the string given with components
1810 * separated @sep.
1811 */
1812static __be32 nfsd4_encode_components(char sep, char *components,
1813 __be32 **pp, int *buflen)
1814{
1815 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1816}
1817
81c3f413
BF		 1818/*
1819 * encode a location element of a fs_locations structure
1820 */
b37ad28b 1821static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1822 __be32 **pp, int *buflen)
81c3f413 1823{
b37ad28b 1824 __be32 status;
2ebbc012 1825 __be32 *p = *pp;
81c3f413 1826
e7a0444a
WAA		 1827 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1828 '[', ']');
81c3f413
BF		 1829 if (status)
1830 return status;
1831 status = nfsd4_encode_components('/', location->path, &p, buflen);
1832 if (status)
1833 return status;
1834 *pp = p;
1835 return 0;
1836}
1837
1838/*
ed748aac 1839 * Encode a path in RFC3530 'pathname4' format
81c3f413 1840 */
ed748aac
TM		 1841static __be32 nfsd4_encode_path(const struct path *root,
1842 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1843{
301f0268 1844 struct path cur = *path;
ed748aac
TM		 1845 __be32 *p = *pp;
1846 struct dentry **components = NULL;
1847 unsigned int ncomponents = 0;
1848 __be32 err = nfserr_jukebox;
81c3f413 1849
ed748aac 1850 dprintk("nfsd4_encode_components(");
81c3f413 1851
ed748aac
TM		 1852 path_get(&cur);
1853 /* First walk the path up to the nfsd root, and store the
1854 * dentries/path components in an array.
1855 */
1856 for (;;) {
1857 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1858 break;
1859 if (cur.dentry == cur.mnt->mnt_root) {
1860 if (follow_up(&cur))
1861 continue;
1862 goto out_free;
1863 }
1864 if ((ncomponents & 15) == 0) {
1865 struct dentry **new;
1866 new = krealloc(components,
1867 sizeof(*new) * (ncomponents + 16),
1868 GFP_KERNEL);
1869 if (!new)
1870 goto out_free;
1871 components = new;
1872 }
1873 components[ncomponents++] = cur.dentry;
1874 cur.dentry = dget_parent(cur.dentry);
1875 }
81c3f413 1876
ed748aac
TM		 1877 *buflen -= 4;
1878 if (*buflen < 0)
1879 goto out_free;
1880 WRITE32(ncomponents);
1881
1882 while (ncomponents) {
1883 struct dentry *dentry = components[ncomponents - 1];
301f0268 1884 unsigned int len;
ed748aac 1885
301f0268
AV		 1886 spin_lock(&dentry->d_lock);
1887 len = dentry->d_name.len;
ed748aac 1888 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
301f0268
AV		 1889 if (*buflen < 0) {
1890 spin_unlock(&dentry->d_lock);
ed748aac 1891 goto out_free;
301f0268 1892 }
ed748aac
TM		 1893 WRITE32(len);
1894 WRITEMEM(dentry->d_name.name, len);
1895 dprintk("/%s", dentry->d_name.name);
301f0268 1896 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1897 dput(dentry);
1898 ncomponents--;
81c3f413 1899 }
ed748aac
TM		 1900
1901 *pp = p;
1902 err = 0;
1903out_free:
1904 dprintk(")\n");
1905 while (ncomponents)
1906 dput(components[--ncomponents]);
1907 kfree(components);
1908 path_put(&cur);
1909 return err;
1910}
1911
1912static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1913 const struct path *path, __be32 **pp, int *buflen)
1914{
1915 struct svc_export *exp_ps;
1916 __be32 res;
1917
1918 exp_ps = rqst_find_fsidzero_export(rqstp);
1919 if (IS_ERR(exp_ps))
1920 return nfserrno(PTR_ERR(exp_ps));
1921 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1922 exp_put(exp_ps);
1923 return res;
81c3f413
BF		 1924}
1925
1926/*
1927 * encode a fs_locations structure
1928 */
b37ad28b 1929static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1930 struct svc_export *exp,
2ebbc012 1931 __be32 **pp, int *buflen)
81c3f413 1932{
b37ad28b 1933 __be32 status;
cc45f017 1934 int i;
2ebbc012 1935 __be32 *p = *pp;
81c3f413 1936 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1937
ed748aac 1938 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1939 if (status)
1940 return status;
1941 if ((*buflen -= 4) < 0)
1942 return nfserr_resource;
1943 WRITE32(fslocs->locations_count);
1944 for (i=0; i<fslocs->locations_count; i++) {
1945 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1946 &p, buflen);
1947 if (status)
1948 return status;
1949 }
1950 *pp = p;
1951 return 0;
1952}
1da177e4 1953
3d2544b1
BF		 1954static u32 nfs4_file_type(umode_t mode)
1955{
1956 switch (mode & S_IFMT) {
1957 case S_IFIFO: return NF4FIFO;
1958 case S_IFCHR: return NF4CHR;
1959 case S_IFDIR: return NF4DIR;
1960 case S_IFBLK: return NF4BLK;
1961 case S_IFLNK: return NF4LNK;
1962 case S_IFREG: return NF4REG;
1963 case S_IFSOCK: return NF4SOCK;
1964 default: return NF4BAD;
1965 };
1966}
1da177e4 1967
b37ad28b 1968static __be32
ab8e4aee 1969nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
2ebbc012 1970 __be32 **p, int *buflen)
1da177e4
LT		 1971{
1972 int status;
1973
1974 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1975 return nfserr_resource;
1976 if (whotype != NFS4_ACL_WHO_NAMED)
1977 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
ab8e4aee
EB		 1978 else if (gid_valid(gid))
1979 status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
1da177e4 1980 else
ab8e4aee 1981 status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
1da177e4
LT		 1982 if (status < 0)
1983 return nfserrno(status);
1984 *p = xdr_encode_opaque(*p, NULL, status);
1985 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1986 BUG_ON(*buflen < 0);
1987 return 0;
1988}
1989
b37ad28b 1990static inline __be32
ab8e4aee 1991nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
1da177e4 1992{
ab8e4aee
EB		 1993 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
1994 p, buflen);
1da177e4
LT		 1995}
1996
b37ad28b 1997static inline __be32
ab8e4aee 1998nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
1da177e4 1999{
ab8e4aee
EB		 2000 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
2001 p, buflen);
1da177e4
LT		 2002}
2003
b37ad28b 2004static inline __be32
ab8e4aee 2005nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
2ebbc012 2006 __be32 **p, int *buflen)
1da177e4 2007{
ab8e4aee
EB		 2008 kuid_t uid = INVALID_UID;
2009 kgid_t gid = INVALID_GID;
2010
2011 if (ace->whotype == NFS4_ACL_WHO_NAMED) {
2012 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2013 gid = ace->who_gid;
2014 else
2015 uid = ace->who_uid;
2016 }
2017 return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
1da177e4
LT		 2018}
2019
42ca0993
BF		 2020#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2021 FATTR4_WORD0_RDATTR_ERROR)
2022#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2023
18032ca0
DQ		 2024#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2025static inline __be32
2026nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
2027{
2028 __be32 *p = *pp;
2029
2030 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
2031 return nfserr_resource;
2032
2033 /*
2034 * For now we use a 0 here to indicate the null translation; in
2035 * the future we may place a call to translation code here.
2036 */
2037 if ((*buflen -= 8) < 0)
2038 return nfserr_resource;
2039
2040 WRITE32(0); /* lfs */
2041 WRITE32(0); /* pi */
2042 p = xdr_encode_opaque(p, context, len);
2043 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2044
2045 *pp = p;
2046 return 0;
2047}
2048#else
2049static inline __be32
ba4e55bb 2050nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
18032ca0
DQ		 2051{ return 0; }
2052#endif
2053
b37ad28b 2054static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2055{
2056 /* As per referral draft: */
2057 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2058 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2059 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2060 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2061 *rdattr_err = NFSERR_MOVED;
2062 else
2063 return nfserr_moved;
2064 }
2065 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2066 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2067 return 0;
2068}
1da177e4 2069
ae7095a7
BF		 2070
2071static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2072{
2073 struct path path = exp->ex_path;
2074 int err;
2075
2076 path_get(&path);
2077 while (follow_up(&path)) {
2078 if (path.dentry != path.mnt->mnt_root)
2079 break;
2080 }
3dadecce 2081 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2082 path_put(&path);
2083 return err;
2084}
2085
1da177e4
LT		 2086/*
2087 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2088 * ourselves.
2089 *
84822d0b 2090 * countp is the buffer size in _words_
1da177e4 2091 */
b37ad28b 2092__be32
1da177e4 2093nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
84822d0b 2094 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
406a7ea9 2095 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2096{
2097 u32 bmval0 = bmval[0];
2098 u32 bmval1 = bmval[1];
7e705706 2099 u32 bmval2 = bmval[2];
1da177e4
LT		 2100 struct kstat stat;
2101 struct svc_fh tempfh;
2102 struct kstatfs statfs;
84822d0b 2103 int buflen = count << 2;
2ebbc012 2104 __be32 *attrlenp;
1da177e4
LT		 2105 u32 dummy;
2106 u64 dummy64;
42ca0993 2107 u32 rdattr_err = 0;
84822d0b 2108 __be32 *p = *buffer;
b37ad28b 2109 __be32 status;
b8dd7b9a 2110 int err;
1da177e4
LT		 2111 int aclsupport = 0;
2112 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2113 void *context = NULL;
2114 int contextlen;
2115 bool contextsupport = false;
7e705706
AA		 2116 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2117 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2118 struct path path = {
2119 .mnt = exp->ex_path.mnt,
2120 .dentry = dentry,
2121 };
3d733711 2122 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2123
2124 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2125 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2126 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2127 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2128
42ca0993 2129 if (exp->ex_fslocs.migrated) {
7e705706 2130 BUG_ON(bmval[2]);
42ca0993
BF		 2131 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2132 if (status)
2133 goto out;
2134 }
2135
3dadecce 2136 err = vfs_getattr(&path, &stat);
b8dd7b9a 2137 if (err)
1da177e4 2138 goto out_nfserr;
a16e92ed
BF		 2139 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2140 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2141 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2142 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2143 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2144 if (err)
1da177e4
LT		 2145 goto out_nfserr;
2146 }
2147 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2148 fh_init(&tempfh, NFS4_FHSIZE);
2149 status = fh_compose(&tempfh, exp, dentry, NULL);
2150 if (status)
2151 goto out;
2152 fhp = &tempfh;
2153 }
2154 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2155 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2156 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2157 aclsupport = (err == 0);
1da177e4 2158 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2159 if (err == -EOPNOTSUPP)
1da177e4 2160 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2161 else if (err == -EINVAL) {
1da177e4
LT		 2162 status = nfserr_attrnotsupp;
2163 goto out;
b8dd7b9a 2164 } else if (err != 0)
1da177e4
LT		 2165 goto out_nfserr;
2166 }
2167 }
1da177e4 2168
18032ca0
DQ		 2169#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2170 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2171 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2172 err = security_inode_getsecctx(dentry->d_inode,
2173 &context, &contextlen);
2174 contextsupport = (err == 0);
2175 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2176 if (err == -EOPNOTSUPP)
2177 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2178 else if (err)
2179 goto out_nfserr;
2180 }
2181 }
2182#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2183
2b44f1ba
BH		 2184 if (bmval2) {
2185 if ((buflen -= 16) < 0)
2186 goto out_resource;
7e705706
AA		 2187 WRITE32(3);
2188 WRITE32(bmval0);
2189 WRITE32(bmval1);
2190 WRITE32(bmval2);
2b44f1ba
BH		 2191 } else if (bmval1) {
2192 if ((buflen -= 12) < 0)
2193 goto out_resource;
7e705706
AA		 2194 WRITE32(2);
2195 WRITE32(bmval0);
2196 WRITE32(bmval1);
2197 } else {
2b44f1ba
BH		 2198 if ((buflen -= 8) < 0)
2199 goto out_resource;
7e705706
AA		 2200 WRITE32(1);
2201 WRITE32(bmval0);
2202 }
1da177e4
LT		 2203 attrlenp = p++; /* to be backfilled later */
2204
2205 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2206 u32 word0 = nfsd_suppattrs0(minorversion);
2207 u32 word1 = nfsd_suppattrs1(minorversion);
2208 u32 word2 = nfsd_suppattrs2(minorversion);
2209
42ca0993
BF		 2210 if (!aclsupport)
2211 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2212 if (!contextsupport)
2213 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2214 if (!word2) {
2b44f1ba
BH		 2215 if ((buflen -= 12) < 0)
2216 goto out_resource;
7e705706
AA		 2217 WRITE32(2);
2218 WRITE32(word0);
2219 WRITE32(word1);
2220 } else {
2b44f1ba
BH		 2221 if ((buflen -= 16) < 0)
2222 goto out_resource;
7e705706
AA		 2223 WRITE32(3);
2224 WRITE32(word0);
2225 WRITE32(word1);
2226 WRITE32(word2);
2227 }
1da177e4
LT		 2228 }
2229 if (bmval0 & FATTR4_WORD0_TYPE) {
2230 if ((buflen -= 4) < 0)
2231 goto out_resource;
3d2544b1 2232 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2233 if (dummy == NF4BAD) {
2234 status = nfserr_serverfault;
2235 goto out;
2236 }
1da177e4
LT		 2237 WRITE32(dummy);
2238 }
2239 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2240 if ((buflen -= 4) < 0)
2241 goto out_resource;
49640001 2242 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2243 WRITE32(NFS4_FH_PERSISTENT);
49640001 2244 else
e34ac862 2245 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2246 }
2247 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2248 if ((buflen -= 8) < 0)
2249 goto out_resource;
c654b8a9 2250 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2251 }
2252 if (bmval0 & FATTR4_WORD0_SIZE) {
2253 if ((buflen -= 8) < 0)
2254 goto out_resource;
2255 WRITE64(stat.size);
2256 }
2257 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2258 if ((buflen -= 4) < 0)
2259 goto out_resource;
2260 WRITE32(1);
2261 }
2262 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2263 if ((buflen -= 4) < 0)
2264 goto out_resource;
2265 WRITE32(1);
2266 }
2267 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2268 if ((buflen -= 4) < 0)
2269 goto out_resource;
2270 WRITE32(0);
2271 }
2272 if (bmval0 & FATTR4_WORD0_FSID) {
2273 if ((buflen -= 16) < 0)
2274 goto out_resource;
42ca0993
BF		 2275 if (exp->ex_fslocs.migrated) {
2276 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2277 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2278 } else switch(fsid_source(fhp)) {
2279 case FSIDSOURCE_FSID:
1da177e4
LT		 2280 WRITE64((u64)exp->ex_fsid);
2281 WRITE64((u64)0);
af6a4e28
N		 2282 break;
2283 case FSIDSOURCE_DEV:
1da177e4
LT		 2284 WRITE32(0);
2285 WRITE32(MAJOR(stat.dev));
2286 WRITE32(0);
2287 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2288 break;
2289 case FSIDSOURCE_UUID:
2290 WRITEMEM(exp->ex_uuid, 16);
2291 break;
1da177e4
LT		 2292 }
2293 }
2294 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2295 if ((buflen -= 4) < 0)
2296 goto out_resource;
2297 WRITE32(0);
2298 }
2299 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2300 if ((buflen -= 4) < 0)
2301 goto out_resource;
3d733711 2302 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2303 }
2304 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2305 if ((buflen -= 4) < 0)
2306 goto out_resource;
42ca0993 2307 WRITE32(rdattr_err);
1da177e4
LT		 2308 }
2309 if (bmval0 & FATTR4_WORD0_ACL) {
2310 struct nfs4_ace *ace;
1da177e4
LT		 2311
2312 if (acl == NULL) {
2313 if ((buflen -= 4) < 0)
2314 goto out_resource;
2315
2316 WRITE32(0);
2317 goto out_acl;
2318 }
2319 if ((buflen -= 4) < 0)
2320 goto out_resource;
2321 WRITE32(acl->naces);
2322
28e05dd8 2323 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2324 if ((buflen -= 4*3) < 0)
2325 goto out_resource;
2326 WRITE32(ace->type);
2327 WRITE32(ace->flag);
2328 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ab8e4aee 2329 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
1da177e4
LT		 2330 if (status)
2331 goto out;
2332 }
2333 }
2334out_acl:
2335 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2336 if ((buflen -= 4) < 0)
2337 goto out_resource;
2338 WRITE32(aclsupport ?
2339 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2340 }
2341 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2342 if ((buflen -= 4) < 0)
2343 goto out_resource;
2344 WRITE32(1);
2345 }
2346 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2347 if ((buflen -= 4) < 0)
2348 goto out_resource;
2930d381 2349 WRITE32(0);
1da177e4
LT		 2350 }
2351 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2352 if ((buflen -= 4) < 0)
2353 goto out_resource;
2354 WRITE32(1);
2355 }
2356 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2357 if ((buflen -= 4) < 0)
2358 goto out_resource;
2359 WRITE32(1);
2360 }
2361 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2362 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2363 if (buflen < 0)
2364 goto out_resource;
2365 WRITE32(fhp->fh_handle.fh_size);
2366 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2367 }
2368 if (bmval0 & FATTR4_WORD0_FILEID) {
2369 if ((buflen -= 8) < 0)
2370 goto out_resource;
40ee5dc6 2371 WRITE64(stat.ino);
1da177e4
LT		 2372 }
2373 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2374 if ((buflen -= 8) < 0)
2375 goto out_resource;
2376 WRITE64((u64) statfs.f_ffree);
2377 }
2378 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2379 if ((buflen -= 8) < 0)
2380 goto out_resource;
2381 WRITE64((u64) statfs.f_ffree);
2382 }
2383 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2384 if ((buflen -= 8) < 0)
2385 goto out_resource;
2386 WRITE64((u64) statfs.f_files);
2387 }
81c3f413
BF		 2388 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2389 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
81c3f413
BF		 2390 if (status)
2391 goto out;
2392 }
1da177e4
LT		 2393 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2394 if ((buflen -= 4) < 0)
2395 goto out_resource;
2396 WRITE32(1);
2397 }
2398 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2399 if ((buflen -= 8) < 0)
2400 goto out_resource;
aea240f4 2401 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2402 }
2403 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2404 if ((buflen -= 4) < 0)
2405 goto out_resource;
2406 WRITE32(255);
2407 }
2408 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2409 if ((buflen -= 4) < 0)
2410 goto out_resource;
a16e92ed 2411 WRITE32(statfs.f_namelen);
1da177e4
LT		 2412 }
2413 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2414 if ((buflen -= 8) < 0)
2415 goto out_resource;
7adae489 2416 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2417 }
2418 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2419 if ((buflen -= 8) < 0)
2420 goto out_resource;
7adae489 2421 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2422 }
2423 if (bmval1 & FATTR4_WORD1_MODE) {
2424 if ((buflen -= 4) < 0)
2425 goto out_resource;
2426 WRITE32(stat.mode & S_IALLUGO);
2427 }
2428 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2429 if ((buflen -= 4) < 0)
2430 goto out_resource;
2431 WRITE32(1);
2432 }
2433 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2434 if ((buflen -= 4) < 0)
2435 goto out_resource;
2436 WRITE32(stat.nlink);
2437 }
2438 if (bmval1 & FATTR4_WORD1_OWNER) {
2439 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1da177e4
LT		 2440 if (status)
2441 goto out;
2442 }
2443 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2444 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1da177e4
LT		 2445 if (status)
2446 goto out;
2447 }
2448 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2449 if ((buflen -= 8) < 0)
2450 goto out_resource;
2451 WRITE32((u32) MAJOR(stat.rdev));
2452 WRITE32((u32) MINOR(stat.rdev));
2453 }
2454 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2455 if ((buflen -= 8) < 0)
2456 goto out_resource;
2457 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2458 WRITE64(dummy64);
2459 }
2460 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2461 if ((buflen -= 8) < 0)
2462 goto out_resource;
2463 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2464 WRITE64(dummy64);
2465 }
2466 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2467 if ((buflen -= 8) < 0)
2468 goto out_resource;
2469 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2470 WRITE64(dummy64);
2471 }
2472 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2473 if ((buflen -= 8) < 0)
2474 goto out_resource;
2475 dummy64 = (u64)stat.blocks << 9;
2476 WRITE64(dummy64);
2477 }
2478 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2479 if ((buflen -= 12) < 0)
2480 goto out_resource;
bf8d9097 2481 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2482 WRITE32(stat.atime.tv_nsec);
2483 }
2484 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2485 if ((buflen -= 12) < 0)
2486 goto out_resource;
2487 WRITE32(0);
2488 WRITE32(1);
2489 WRITE32(0);
2490 }
2491 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2492 if ((buflen -= 12) < 0)
2493 goto out_resource;
bf8d9097 2494 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2495 WRITE32(stat.ctime.tv_nsec);
2496 }
2497 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2498 if ((buflen -= 12) < 0)
2499 goto out_resource;
bf8d9097 2500 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2501 WRITE32(stat.mtime.tv_nsec);
2502 }
2503 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2504 if ((buflen -= 8) < 0)
2505 goto out_resource;
406a7ea9
FF		 2506 /*
2507 * Get parent's attributes if not ignoring crossmount
2508 * and this is the root of a cross-mounted filesystem.
2509 */
2510 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2511 dentry == exp->ex_path.mnt->mnt_root)
2512 get_parent_attributes(exp, &stat);
40ee5dc6 2513 WRITE64(stat.ino);
1da177e4 2514 }
18032ca0
DQ		 2515 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2516 status = nfsd4_encode_security_label(rqstp, context,
2517 contextlen, &p, &buflen);
2518 if (status)
2519 goto out;
2520 }
8c18f205
BH		 2521 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2522 WRITE32(3);
2523 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2524 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2525 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2526 }
7e705706 2527
1da177e4 2528 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
84822d0b 2529 *buffer = p;
1da177e4
LT		 2530 status = nfs_ok;
2531
2532out:
ba4e55bb 2533#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2534 if (context)
2535 security_release_secctx(context, contextlen);
ba4e55bb 2536#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2537 kfree(acl);
1da177e4
LT		 2538 if (fhp == &tempfh)
2539 fh_put(&tempfh);
2540 return status;
2541out_nfserr:
b8dd7b9a 2542 status = nfserrno(err);
1da177e4
LT		 2543 goto out;
2544out_resource:
1da177e4
LT		 2545 status = nfserr_resource;
2546 goto out;
1da177e4
LT		 2547}
2548
c0ce6ec8
BF		 2549static inline int attributes_need_mount(u32 *bmval)
2550{
2551 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2552 return 1;
2553 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2554 return 1;
2555 return 0;
2556}
2557
b37ad28b 2558static __be32
1da177e4 2559nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2560 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2561{
2562 struct svc_export *exp = cd->rd_fhp->fh_export;
2563 struct dentry *dentry;
b37ad28b 2564 __be32 nfserr;
406a7ea9 2565 int ignore_crossmnt = 0;
1da177e4
LT		 2566
2567 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2568 if (IS_ERR(dentry))
2569 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2570 if (!dentry->d_inode) {
2571 /*
2572 * nfsd_buffered_readdir drops the i_mutex between
2573 * readdir and calling this callback, leaving a window
2574 * where this directory entry could have gone away.
2575 */
2576 dput(dentry);
2577 return nfserr_noent;
2578 }
1da177e4
LT		 2579
2580 exp_get(exp);
406a7ea9
FF		 2581 /*
2582 * In the case of a mountpoint, the client may be asking for
2583 * attributes that are only properties of the underlying filesystem
2584 * as opposed to the cross-mounted file system. In such a case,
2585 * we will not follow the cross mount and will fill the attribtutes
2586 * directly from the mountpoint dentry.
2587 */
3227fa41 2588 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2589 int err;
2590
3227fa41
BF		 2591 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2592 && !attributes_need_mount(cd->rd_bmval)) {
2593 ignore_crossmnt = 1;
2594 goto out_encode;
2595 }
dcb488a3
AA		 2596 /*
2597 * Why the heck aren't we just using nfsd_lookup??
2598 * Different "."/".." handling? Something else?
2599 * At least, add a comment here to explain....
2600 */
021d3a72
BF		 2601 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2602 if (err) {
2603 nfserr = nfserrno(err);
1da177e4
LT		 2604 goto out_put;
2605 }
dcb488a3
AA		 2606 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2607 if (nfserr)
2608 goto out_put;
1da177e4
LT		 2609
2610 }
3227fa41 2611out_encode:
1da177e4 2612 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2613 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2614out_put:
2615 dput(dentry);
2616 exp_put(exp);
2617 return nfserr;
2618}
2619
2ebbc012 2620static __be32 *
b37ad28b 2621nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2622{
1da177e4
LT		 2623 if (buflen < 6)
2624 return NULL;
2625 *p++ = htonl(2);
2626 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2627 *p++ = htonl(0); /* bmval1 */
2628
87915c64 2629 *p++ = htonl(4); /* attribute length */
1da177e4 2630 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2631 return p;
2632}
2633
2634static int
a0ad13ef
N		 2635nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2636 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2637{
a0ad13ef 2638 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2639 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2640 int buflen;
2ebbc012 2641 __be32 *p = cd->buffer;
b2c0cea6 2642 __be32 *cookiep;
b37ad28b 2643 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2644
2645 /* In nfsv4, "." and ".." never make it onto the wire.. */
2646 if (name && isdotent(name, namlen)) {
2647 cd->common.err = nfs_ok;
2648 return 0;
2649 }
2650
2651 if (cd->offset)
2652 xdr_encode_hyper(cd->offset, (u64) offset);
2653
2654 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2655 if (buflen < 0)
2656 goto fail;
2657
2658 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2659 cookiep = p;
1da177e4
LT		 2660 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2661 p = xdr_encode_array(p, name, namlen); /* name length & name */
2662
84822d0b 2663 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2664 switch (nfserr) {
2665 case nfs_ok:
1da177e4
LT		 2666 break;
2667 case nfserr_resource:
2668 nfserr = nfserr_toosmall;
2669 goto fail;
b2c0cea6
BF		 2670 case nfserr_noent:
2671 goto skip_entry;
1da177e4
LT		 2672 default:
2673 /*
2674 * If the client requested the RDATTR_ERROR attribute,
2675 * we stuff the error code into this attribute
2676 * and continue. If this attribute was not requested,
2677 * then in accordance with the spec, we fail the
2678 * entire READDIR operation(!)
2679 */
2680 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2681 goto fail;
1da177e4 2682 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2683 if (p == NULL) {
2684 nfserr = nfserr_toosmall;
1da177e4 2685 goto fail;
34081efc 2686 }
1da177e4
LT		 2687 }
2688 cd->buflen -= (p - cd->buffer);
2689 cd->buffer = p;
b2c0cea6
BF		 2690 cd->offset = cookiep;
2691skip_entry:
1da177e4
LT		 2692 cd->common.err = nfs_ok;
2693 return 0;
2694fail:
2695 cd->common.err = nfserr;
2696 return -EINVAL;
2697}
2698
e2f282b9
BH		 2699static void
2700nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2701{
bc749ca4 2702 __be32 *p;
e2f282b9
BH		 2703
2704 RESERVE_SPACE(sizeof(stateid_t));
2705 WRITE32(sid->si_generation);
2706 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2707 ADJUST_ARGS();
2708}
2709
695e12f8 2710static __be32
b37ad28b 2711nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2712{
bc749ca4 2713 __be32 *p;
1da177e4
LT		 2714
2715 if (!nfserr) {
2716 RESERVE_SPACE(8);
2717 WRITE32(access->ac_supported);
2718 WRITE32(access->ac_resp_access);
2719 ADJUST_ARGS();
2720 }
695e12f8 2721 return nfserr;
1da177e4
LT		 2722}
2723
1d1bc8f2
BF		 2724static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2725{
2726 __be32 *p;
2727
2728 if (!nfserr) {
2729 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2730 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2731 WRITE32(bcts->dir);
6e67b5d1 2732 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2733 WRITE32(0);
2734 ADJUST_ARGS();
2735 }
2736 return nfserr;
2737}
2738
695e12f8 2739static __be32
b37ad28b 2740nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2741{
e2f282b9
BH		 2742 if (!nfserr)
2743 nfsd4_encode_stateid(resp, &close->cl_stateid);
2744
695e12f8 2745 return nfserr;
1da177e4
LT		 2746}
2747
2748
695e12f8 2749static __be32
b37ad28b 2750nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2751{
bc749ca4 2752 __be32 *p;
1da177e4
LT		 2753
2754 if (!nfserr) {
ab4684d1
CL		 2755 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2756 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2757 ADJUST_ARGS();
2758 }
695e12f8 2759 return nfserr;
1da177e4
LT		 2760}
2761
695e12f8 2762static __be32
b37ad28b 2763nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2764{
bc749ca4 2765 __be32 *p;
1da177e4
LT		 2766
2767 if (!nfserr) {
2768 RESERVE_SPACE(32);
c654b8a9 2769 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2770 WRITE32(2);
2771 WRITE32(create->cr_bmval[0]);
2772 WRITE32(create->cr_bmval[1]);
2773 ADJUST_ARGS();
2774 }
695e12f8 2775 return nfserr;
1da177e4
LT		 2776}
2777
b37ad28b
AV		 2778static __be32
2779nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2780{
2781 struct svc_fh *fhp = getattr->ga_fhp;
2782 int buflen;
2783
2784 if (nfserr)
2785 return nfserr;
2786
2787 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2788 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
84822d0b 2789 &resp->p, buflen, getattr->ga_bmval,
406a7ea9 2790 resp->rqstp, 0);
1da177e4
LT		 2791 return nfserr;
2792}
2793
695e12f8
BH		 2794static __be32
2795nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2796{
695e12f8 2797 struct svc_fh *fhp = *fhpp;
1da177e4 2798 unsigned int len;
bc749ca4 2799 __be32 *p;
1da177e4
LT		 2800
2801 if (!nfserr) {
2802 len = fhp->fh_handle.fh_size;
2803 RESERVE_SPACE(len + 4);
2804 WRITE32(len);
2805 WRITEMEM(&fhp->fh_handle.fh_base, len);
2806 ADJUST_ARGS();
2807 }
695e12f8 2808 return nfserr;
1da177e4
LT		 2809}
2810
2811/*
2812* Including all fields other than the name, a LOCK4denied structure requires
2813* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2814*/
2815static void
2816nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2817{
7c13f344 2818 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2819 __be32 *p;
1da177e4 2820
7c13f344 2821 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2822 WRITE64(ld->ld_start);
2823 WRITE64(ld->ld_length);
2824 WRITE32(ld->ld_type);
7c13f344 2825 if (conf->len) {
1da177e4 2826 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2827 WRITE32(conf->len);
2828 WRITEMEM(conf->data, conf->len);
2829 kfree(conf->data);
1da177e4
LT		 2830 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2831 WRITE64((u64)0); /* clientid */
2832 WRITE32(0); /* length of owner name */
2833 }
2834 ADJUST_ARGS();
2835}
2836
695e12f8 2837static __be32
b37ad28b 2838nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2839{
e2f282b9
BH		 2840 if (!nfserr)
2841 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2842 else if (nfserr == nfserr_denied)
1da177e4
LT		 2843 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2844
695e12f8 2845 return nfserr;
1da177e4
LT		 2846}
2847
695e12f8 2848static __be32
b37ad28b 2849nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2850{
2851 if (nfserr == nfserr_denied)
2852 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2853 return nfserr;
1da177e4
LT		 2854}
2855
695e12f8 2856static __be32
b37ad28b 2857nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2858{
e2f282b9
BH		 2859 if (!nfserr)
2860 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2861
695e12f8 2862 return nfserr;
1da177e4
LT		 2863}
2864
2865
695e12f8 2866static __be32
b37ad28b 2867nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2868{
bc749ca4 2869 __be32 *p;
1da177e4
LT		 2870
2871 if (!nfserr) {
2872 RESERVE_SPACE(20);
c654b8a9 2873 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2874 ADJUST_ARGS();
2875 }
695e12f8 2876 return nfserr;
1da177e4
LT		 2877}
2878
2879
695e12f8 2880static __be32
b37ad28b 2881nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2882{
bc749ca4 2883 __be32 *p;
1da177e4
LT		 2884
2885 if (nfserr)
2886 goto out;
2887
e2f282b9
BH		 2888 nfsd4_encode_stateid(resp, &open->op_stateid);
2889 RESERVE_SPACE(40);
c654b8a9 2890 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2891 WRITE32(open->op_rflags);
2892 WRITE32(2);
2893 WRITE32(open->op_bmval[0]);
2894 WRITE32(open->op_bmval[1]);
2895 WRITE32(open->op_delegate_type);
2896 ADJUST_ARGS();
2897
2898 switch (open->op_delegate_type) {
2899 case NFS4_OPEN_DELEGATE_NONE:
2900 break;
2901 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2902 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2903 RESERVE_SPACE(20);
7b190fec 2904 WRITE32(open->op_recall);
1da177e4
LT		 2905
2906 /*
2907 * TODO: ACE's in delegations
2908 */
2909 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2910 WRITE32(0);
2911 WRITE32(0);
2912 WRITE32(0); /* XXX: is NULL principal ok? */
2913 ADJUST_ARGS();
2914 break;
2915 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2916 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2917 RESERVE_SPACE(32);
1da177e4
LT		 2918 WRITE32(0);
2919
2920 /*
2921 * TODO: space_limit's in delegations
2922 */
2923 WRITE32(NFS4_LIMIT_SIZE);
2924 WRITE32(~(u32)0);
2925 WRITE32(~(u32)0);
2926
2927 /*
2928 * TODO: ACE's in delegations
2929 */
2930 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2931 WRITE32(0);
2932 WRITE32(0);
2933 WRITE32(0); /* XXX: is NULL principal ok? */
2934 ADJUST_ARGS();
2935 break;
d24433cd
BH		 2936 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2937 switch (open->op_why_no_deleg) {
2938 case WND4_CONTENTION:
2939 case WND4_RESOURCE:
2940 RESERVE_SPACE(8);
2941 WRITE32(open->op_why_no_deleg);
2942 WRITE32(0); /* deleg signaling not supported yet */
2943 break;
2944 default:
2945 RESERVE_SPACE(4);
2946 WRITE32(open->op_why_no_deleg);
2947 }
2948 ADJUST_ARGS();
2949 break;
1da177e4
LT		 2950 default:
2951 BUG();
2952 }
2953 /* XXX save filehandle here */
2954out:
695e12f8 2955 return nfserr;
1da177e4
LT		 2956}
2957
695e12f8 2958static __be32
b37ad28b 2959nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 2960{
e2f282b9
BH		 2961 if (!nfserr)
2962 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2963
695e12f8 2964 return nfserr;
1da177e4
LT		 2965}
2966
695e12f8 2967static __be32
b37ad28b 2968nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 2969{
e2f282b9
BH		 2970 if (!nfserr)
2971 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2972
695e12f8 2973 return nfserr;
1da177e4
LT		 2974}
2975
b37ad28b
AV		 2976static __be32
2977nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2978 struct nfsd4_read *read)
1da177e4
LT		 2979{
2980 u32 eof;
afc59400
BF		 2981 int v;
2982 struct page *page;
1da177e4
LT		 2983 unsigned long maxcount;
2984 long len;
bc749ca4 2985 __be32 *p;
1da177e4
LT		 2986
2987 if (nfserr)
2988 return nfserr;
2989 if (resp->xbuf->page_len)
2990 return nfserr_resource;
2991
2992 RESERVE_SPACE(8); /* eof flag and byte count */
2993
7adae489 2994 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2995 if (maxcount > read->rd_length)
2996 maxcount = read->rd_length;
2997
2998 len = maxcount;
2999 v = 0;
3000 while (len > 0) {
afc59400
BF		 3001 page = *(resp->rqstp->rq_next_page);
3002 if (!page) { /* ran out of pages */
d5f50b0c
BF		 3003 maxcount -= len;
3004 break;
3005 }
afc59400 3006 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 3007 resp->rqstp->rq_vec[v].iov_len =
44524359 3008 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 3009 resp->rqstp->rq_next_page++;
1da177e4
LT		 3010 v++;
3011 len -= PAGE_SIZE;
3012 }
3013 read->rd_vlen = v;
3014
039a87ca 3015 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 3016 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 3017 &maxcount);
3018
1da177e4
LT		 3019 if (nfserr)
3020 return nfserr;
44524359
N		 3021 eof = (read->rd_offset + maxcount >=
3022 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 3023
3024 WRITE32(eof);
3025 WRITE32(maxcount);
3026 ADJUST_ARGS();
6ed6decc
N		 3027 resp->xbuf->head[0].iov_len = (char*)p
3028 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 3029 resp->xbuf->page_len = maxcount;
3030
6ed6decc 3031 /* Use rest of head for padding and remaining ops: */
6ed6decc 3032 resp->xbuf->tail[0].iov_base = p;
1da177e4 3033 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3034 if (maxcount&3) {
6ed6decc
N		 3035 RESERVE_SPACE(4);
3036 WRITE32(0);
1da177e4
LT		 3037 resp->xbuf->tail[0].iov_base += maxcount&3;
3038 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3039 ADJUST_ARGS();
1da177e4
LT		 3040 }
3041 return 0;
3042}
3043
b37ad28b
AV		 3044static __be32
3045nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3046{
3047 int maxcount;
3048 char *page;
bc749ca4 3049 __be32 *p;
1da177e4
LT		 3050
3051 if (nfserr)
3052 return nfserr;
3053 if (resp->xbuf->page_len)
3054 return nfserr_resource;
afc59400 3055 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3056 return nfserr_resource;
1da177e4 3057
afc59400 3058 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3059
3060 maxcount = PAGE_SIZE;
3061 RESERVE_SPACE(4);
3062
3063 /*
3064 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3065 * if they would overflow the buffer. Is this kosher in NFSv4? If
3066 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3067 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3068 */
3069 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3070 if (nfserr == nfserr_isdir)
3071 return nfserr_inval;
3072 if (nfserr)
3073 return nfserr;
3074
3075 WRITE32(maxcount);
3076 ADJUST_ARGS();
6ed6decc
N		 3077 resp->xbuf->head[0].iov_len = (char*)p
3078 - (char*)resp->xbuf->head[0].iov_base;
3079 resp->xbuf->page_len = maxcount;
1da177e4 3080
6ed6decc 3081 /* Use rest of head for padding and remaining ops: */
6ed6decc 3082 resp->xbuf->tail[0].iov_base = p;
1da177e4 3083 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3084 if (maxcount&3) {
6ed6decc
N		 3085 RESERVE_SPACE(4);
3086 WRITE32(0);
1da177e4
LT		 3087 resp->xbuf->tail[0].iov_base += maxcount&3;
3088 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3089 ADJUST_ARGS();
1da177e4
LT		 3090 }
3091 return 0;
3092}
3093
b37ad28b
AV		 3094static __be32
3095nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3096{
3097 int maxcount;
3098 loff_t offset;
2ebbc012 3099 __be32 *page, *savep, *tailbase;
bc749ca4 3100 __be32 *p;
1da177e4
LT		 3101
3102 if (nfserr)
3103 return nfserr;
3104 if (resp->xbuf->page_len)
3105 return nfserr_resource;
afc59400 3106 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3107 return nfserr_resource;
1da177e4 3108
ab4684d1 3109 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3110 savep = p;
3111
3112 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3113 WRITE32(0);
3114 WRITE32(0);
3115 ADJUST_ARGS();
3116 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3117 tailbase = p;
1da177e4
LT		 3118
3119 maxcount = PAGE_SIZE;
3120 if (maxcount > readdir->rd_maxcount)
3121 maxcount = readdir->rd_maxcount;
3122
3123 /*
3124 * Convert from bytes to words, account for the two words already
3125 * written, make sure to leave two words at the end for the next
3126 * pointer and eof field.
3127 */
3128 maxcount = (maxcount >> 2) - 4;
3129 if (maxcount < 0) {
3130 nfserr = nfserr_toosmall;
3131 goto err_no_verf;
3132 }
3133
afc59400 3134 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3135 readdir->common.err = 0;
3136 readdir->buflen = maxcount;
3137 readdir->buffer = page;
3138 readdir->offset = NULL;
3139
3140 offset = readdir->rd_cookie;
3141 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3142 &offset,
3143 &readdir->common, nfsd4_encode_dirent);
3144 if (nfserr == nfs_ok &&
3145 readdir->common.err == nfserr_toosmall &&
3146 readdir->buffer == page)
3147 nfserr = nfserr_toosmall;
1da177e4
LT		 3148 if (nfserr)
3149 goto err_no_verf;
3150
3151 if (readdir->offset)
3152 xdr_encode_hyper(readdir->offset, offset);
3153
3154 p = readdir->buffer;
3155 *p++ = 0; /* no more entries */
3156 *p++ = htonl(readdir->common.err == nfserr_eof);
afc59400
BF		 3157 resp->xbuf->page_len = ((char*)p) -
3158 (char*)page_address(*(resp->rqstp->rq_next_page-1));
1da177e4 3159
bb6e8a9f 3160 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3161 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3162 resp->xbuf->tail[0].iov_len = 0;
3163 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3164 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3165
3166 return 0;
3167err_no_verf:
3168 p = savep;
3169 ADJUST_ARGS();
3170 return nfserr;
3171}
3172
695e12f8 3173static __be32
b37ad28b 3174nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3175{
bc749ca4 3176 __be32 *p;
1da177e4
LT		 3177
3178 if (!nfserr) {
3179 RESERVE_SPACE(20);
c654b8a9 3180 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3181 ADJUST_ARGS();
3182 }
695e12f8 3183 return nfserr;
1da177e4
LT		 3184}
3185
695e12f8 3186static __be32
b37ad28b 3187nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3188{
bc749ca4 3189 __be32 *p;
1da177e4
LT		 3190
3191 if (!nfserr) {
3192 RESERVE_SPACE(40);
c654b8a9
BF		 3193 write_cinfo(&p, &rename->rn_sinfo);
3194 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3195 ADJUST_ARGS();
3196 }
695e12f8 3197 return nfserr;
1da177e4
LT		 3198}
3199
695e12f8 3200static __be32
22b6dee8 3201nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
a77c806f 3202 __be32 nfserr, struct svc_export *exp)
dcb488a3 3203{
676e4ebd 3204 u32 i, nflavs, supported;
4796f457
BF		 3205 struct exp_flavor_info *flavs;
3206 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3207 __be32 *p, *flavorsp;
3208 static bool report = true;
dcb488a3
AA		 3209
3210 if (nfserr)
3211 goto out;
4796f457
BF		 3212 if (exp->ex_nflavors) {
3213 flavs = exp->ex_flavors;
3214 nflavs = exp->ex_nflavors;
3215 } else { /* Handling of some defaults in absence of real secinfo: */
3216 flavs = def_flavs;
3217 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3218 nflavs = 2;
3219 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3220 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3221 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3222 nflavs = 1;
3223 flavs[0].pseudoflavor
3224 = svcauth_gss_flavor(exp->ex_client);
3225 } else {
3226 nflavs = 1;
3227 flavs[0].pseudoflavor
3228 = exp->ex_client->flavour->flavour;
3229 }
3230 }
3231
676e4ebd 3232 supported = 0;
dcb488a3 3233 RESERVE_SPACE(4);
676e4ebd 3234 flavorsp = p++; /* to be backfilled later */
dcb488a3 3235 ADJUST_ARGS();
676e4ebd 3236
4796f457 3237 for (i = 0; i < nflavs; i++) {
676e4ebd 3238 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3239 struct rpcsec_gss_info info;
dcb488a3 3240
676e4ebd
CL		 3241 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3242 supported++;
a9f7b4a0 3243 RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
dcb488a3 3244 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3245 WRITE32(info.oid.len);
3246 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3247 WRITE32(info.qop);
a77c806f 3248 WRITE32(info.service);
dcb488a3 3249 ADJUST_ARGS();
676e4ebd
CL		 3250 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3251 supported++;
dcb488a3 3252 RESERVE_SPACE(4);
676e4ebd 3253 WRITE32(pf);
dcb488a3 3254 ADJUST_ARGS();
676e4ebd
CL		 3255 } else {
3256 if (report)
3257 pr_warn("NFS: SECINFO: security flavor %u "
3258 "is not supported\n", pf);
dcb488a3
AA		 3259 }
3260 }
a77c806f 3261
676e4ebd
CL		 3262 if (nflavs != supported)
3263 report = false;
3264 *flavorsp = htonl(supported);
3265
dcb488a3
AA		 3266out:
3267 if (exp)
3268 exp_put(exp);
695e12f8 3269 return nfserr;
dcb488a3
AA		 3270}
3271
22b6dee8
MJ		 3272static __be32
3273nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3274 struct nfsd4_secinfo *secinfo)
3275{
3276 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3277}
3278
3279static __be32
3280nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3281 struct nfsd4_secinfo_no_name *secinfo)
3282{
3283 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3284}
3285
1da177e4
LT		 3286/*
3287 * The SETATTR encode routine is special -- it always encodes a bitmap,
3288 * regardless of the error status.
3289 */
695e12f8 3290static __be32
b37ad28b 3291nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3292{
bc749ca4 3293 __be32 *p;
1da177e4 3294
18032ca0 3295 RESERVE_SPACE(16);
1da177e4 3296 if (nfserr) {
18032ca0
DQ		 3297 WRITE32(3);
3298 WRITE32(0);
1da177e4
LT		 3299 WRITE32(0);
3300 WRITE32(0);
3301 }
3302 else {
18032ca0 3303 WRITE32(3);
1da177e4
LT		 3304 WRITE32(setattr->sa_bmval[0]);
3305 WRITE32(setattr->sa_bmval[1]);
18032ca0 3306 WRITE32(setattr->sa_bmval[2]);
1da177e4
LT		 3307 }
3308 ADJUST_ARGS();
695e12f8 3309 return nfserr;
1da177e4
LT		 3310}
3311
695e12f8 3312static __be32
b37ad28b 3313nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3314{
bc749ca4 3315 __be32 *p;
1da177e4
LT		 3316
3317 if (!nfserr) {
ab4684d1 3318 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3319 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3320 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3321 ADJUST_ARGS();
3322 }
3323 else if (nfserr == nfserr_clid_inuse) {
3324 RESERVE_SPACE(8);
3325 WRITE32(0);
3326 WRITE32(0);
3327 ADJUST_ARGS();
3328 }
695e12f8 3329 return nfserr;
1da177e4
LT		 3330}
3331
695e12f8 3332static __be32
b37ad28b 3333nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3334{
bc749ca4 3335 __be32 *p;
1da177e4
LT		 3336
3337 if (!nfserr) {
3338 RESERVE_SPACE(16);
3339 WRITE32(write->wr_bytes_written);
3340 WRITE32(write->wr_how_written);
ab4684d1 3341 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3342 ADJUST_ARGS();
3343 }
695e12f8 3344 return nfserr;
1da177e4
LT		 3345}
3346
57266a6e
BF		 3347static const u32 nfs4_minimal_spo_must_enforce[2] = {
3348 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3349 1 << (OP_EXCHANGE_ID - 32) |
3350 1 << (OP_CREATE_SESSION - 32) |
3351 1 << (OP_DESTROY_SESSION - 32) |
3352 1 << (OP_DESTROY_CLIENTID - 32)
3353};
3354
2db134eb 3355static __be32
57b7b43b 3356nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3357 struct nfsd4_exchange_id *exid)
3358{
bc749ca4 3359 __be32 *p;
0733d213
AA		 3360 char *major_id;
3361 char *server_scope;
3362 int major_id_sz;
3363 int server_scope_sz;
3364 uint64_t minor_id = 0;
3365
3366 if (nfserr)
3367 return nfserr;
3368
3369 major_id = utsname()->nodename;
3370 major_id_sz = strlen(major_id);
3371 server_scope = utsname()->nodename;
3372 server_scope_sz = strlen(server_scope);
3373
3374 RESERVE_SPACE(
3375 8 /* eir_clientid */ +
3376 4 /* eir_sequenceid */ +
3377 4 /* eir_flags */ +
a8bb84bc 3378 4 /* spr_how */);
0733d213
AA		 3379
3380 WRITEMEM(&exid->clientid, 8);
3381 WRITE32(exid->seqid);
3382 WRITE32(exid->flags);
3383
0733d213 3384 WRITE32(exid->spa_how);
a8bb84bc
KM		 3385 ADJUST_ARGS();
3386
57266a6e
BF		 3387 switch (exid->spa_how) {
3388 case SP4_NONE:
3389 break;
3390 case SP4_MACH_CRED:
a8bb84bc
KM		 3391 /* spo_must_enforce, spo_must_allow */
3392 RESERVE_SPACE(16);
3393
57266a6e
BF		 3394 /* spo_must_enforce bitmap: */
3395 WRITE32(2);
3396 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3397 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3398 /* empty spo_must_allow bitmap: */
3399 WRITE32(0);
a8bb84bc
KM		 3400
3401 ADJUST_ARGS();
57266a6e
BF		 3402 break;
3403 default:
3404 WARN_ON_ONCE(1);
3405 }
0733d213 3406
a8bb84bc
KM		 3407 RESERVE_SPACE(
3408 8 /* so_minor_id */ +
3409 4 /* so_major_id.len */ +
3410 (XDR_QUADLEN(major_id_sz) * 4) +
3411 4 /* eir_server_scope.len */ +
3412 (XDR_QUADLEN(server_scope_sz) * 4) +
3413 4 /* eir_server_impl_id.count (0) */);
3414
0733d213
AA		 3415 /* The server_owner struct */
3416 WRITE64(minor_id); /* Minor id */
3417 /* major id */
3418 WRITE32(major_id_sz);
3419 WRITEMEM(major_id, major_id_sz);
3420
3421 /* Server scope */
3422 WRITE32(server_scope_sz);
3423 WRITEMEM(server_scope, server_scope_sz);
3424
3425 /* Implementation id */
3426 WRITE32(0); /* zero length nfs_impl_id4 array */
3427 ADJUST_ARGS();
3428 return 0;
2db134eb
AA		 3429}
3430
3431static __be32
57b7b43b 3432nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3433 struct nfsd4_create_session *sess)
3434{
bc749ca4 3435 __be32 *p;
ec6b5d7b
AA		 3436
3437 if (nfserr)
3438 return nfserr;
3439
3440 RESERVE_SPACE(24);
3441 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3442 WRITE32(sess->seqid);
3443 WRITE32(sess->flags);
3444 ADJUST_ARGS();
3445
3446 RESERVE_SPACE(28);
3447 WRITE32(0); /* headerpadsz */
3448 WRITE32(sess->fore_channel.maxreq_sz);
3449 WRITE32(sess->fore_channel.maxresp_sz);
3450 WRITE32(sess->fore_channel.maxresp_cached);
3451 WRITE32(sess->fore_channel.maxops);
3452 WRITE32(sess->fore_channel.maxreqs);
3453 WRITE32(sess->fore_channel.nr_rdma_attrs);
3454 ADJUST_ARGS();
3455
3456 if (sess->fore_channel.nr_rdma_attrs) {
3457 RESERVE_SPACE(4);
3458 WRITE32(sess->fore_channel.rdma_attrs);
3459 ADJUST_ARGS();
3460 }
3461
3462 RESERVE_SPACE(28);
3463 WRITE32(0); /* headerpadsz */
3464 WRITE32(sess->back_channel.maxreq_sz);
3465 WRITE32(sess->back_channel.maxresp_sz);
3466 WRITE32(sess->back_channel.maxresp_cached);
3467 WRITE32(sess->back_channel.maxops);
3468 WRITE32(sess->back_channel.maxreqs);
3469 WRITE32(sess->back_channel.nr_rdma_attrs);
3470 ADJUST_ARGS();
3471
3472 if (sess->back_channel.nr_rdma_attrs) {
3473 RESERVE_SPACE(4);
3474 WRITE32(sess->back_channel.rdma_attrs);
3475 ADJUST_ARGS();
3476 }
3477 return 0;
2db134eb
AA		 3478}
3479
c47d832b 3480static __be32
57b7b43b 3481nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3482 struct nfsd4_sequence *seq)
3483{
bc749ca4 3484 __be32 *p;
b85d4c01
BH		 3485
3486 if (nfserr)
3487 return nfserr;
3488
3489 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3490 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3491 WRITE32(seq->seqid);
3492 WRITE32(seq->slotid);
b7d7ca35
BF		 3493 /* Note slotid's are numbered from zero: */
3494 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3495 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3496 WRITE32(seq->status_flags);
b85d4c01
BH		 3497
3498 ADJUST_ARGS();
557ce264 3499 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3500 return 0;
2db134eb
AA		 3501}
3502
2355c596 3503static __be32
57b7b43b 3504nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3505 struct nfsd4_test_stateid *test_stateid)
3506{
03cfb420 3507 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3508 __be32 *p;
17456804 3509
03cfb420 3510 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3511 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3512
03cfb420 3513 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3514 *p++ = stateid->ts_id_status;
17456804 3515 }
17456804 3516
03cfb420 3517 ADJUST_ARGS();
17456804
BS		 3518 return nfserr;
3519}
3520
695e12f8
BH		 3521static __be32
3522nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3523{
3524 return nfserr;
3525}
3526
3527typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3528
2db134eb
AA		 3529/*
3530 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3531 * since we don't need to filter out obsolete ops as this is
3532 * done in the decoding phase.
3533 */
695e12f8 3534static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3535 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3536 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3537 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3538 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3539 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3540 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3541 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3542 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3543 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3544 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3545 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3546 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3547 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3548 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3549 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3550 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3551 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3552 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3553 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3554 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3555 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3556 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3557 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3558 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3559 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3560 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3561 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3562 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3563 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3564 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3565 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3566 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3567 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3568 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3569 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3570 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3571 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3572
3573 /* NFSv4.1 operations */
3574 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3575 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3576 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3577 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3578 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3579 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3580 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3581 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3582 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3583 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3584 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3585 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3586 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3587 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3588 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3589 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3590 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3591 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3592 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3593};
3594
496c262c
AA		 3595/*
3596 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3597 * after encoding the current operation with pad.
496c262c 3598 *
58e7b33a
MJ		 3599 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3600 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3601 *
58e7b33a 3602 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3603 *
3604 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3605 * will be at least a page and will therefore hold the xdr_buf head.
3606 */
57b7b43b 3607__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3608{
496c262c 3609 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3610 struct nfsd4_session *session = NULL;
3611 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3612 u32 length, tlen = 0;
496c262c
AA		 3613
3614 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3615 return 0;
496c262c
AA		 3616
3617 session = resp->cstate.session;
58e7b33a
MJ		 3618 if (session == NULL)
3619 return 0;
496c262c
AA		 3620
3621 if (xb->page_len == 0) {
3622 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3623 } else {
3624 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3625 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3626
3627 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3628 }
3629 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3630 length, xb->page_len, tlen, pad);
3631
58e7b33a
MJ		 3632 if (length > session->se_fchannel.maxresp_sz)
3633 return nfserr_rep_too_big;
3634
73e79482 3635 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3636 length > session->se_fchannel.maxresp_cached)
496c262c 3637 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3638
3639 return 0;
496c262c
AA		 3640}
3641
1da177e4
LT		 3642void
3643nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3644{
9411b1d4 3645 struct nfs4_stateowner *so = resp->cstate.replay_owner;
2ebbc012 3646 __be32 *statp;
bc749ca4 3647 __be32 *p;
1da177e4
LT		 3648
3649 RESERVE_SPACE(8);
3650 WRITE32(op->opnum);
3651 statp = p++; /* to be backfilled at the end */
3652 ADJUST_ARGS();
3653
695e12f8
BH		 3654 if (op->opnum == OP_ILLEGAL)
3655 goto status;
3656 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3657 !nfsd4_enc_ops[op->opnum]);
3658 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3659 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3660 if (!op->status)
3661 op->status = nfsd4_check_resp_size(resp, 0);
9411b1d4
BF		 3662 if (so) {
3663 so->so_replay.rp_status = op->status;
3664 so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
3665 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3666 }
695e12f8 3667status:
1da177e4
LT		 3668 /*
3669 * Note: We write the status directly, instead of using WRITE32(),
3670 * since it is already in network byte order.
3671 */
3672 *statp = op->status;
3673}
3674
3675/*
3676 * Encode the reply stored in the stateowner reply cache
3677 *
3678 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3679 * previously sent already encoded operation.
3680 *
3681 * called with nfs4_lock_state() held
3682 */
3683void
3684nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3685{
bc749ca4 3686 __be32 *p;
1da177e4
LT		 3687 struct nfs4_replay *rp = op->replay;
3688
3689 BUG_ON(!rp);
3690
3691 RESERVE_SPACE(8);
3692 WRITE32(op->opnum);
3693 *p++ = rp->rp_status; /* already xdr'ed */
3694 ADJUST_ARGS();
3695
3696 RESERVE_SPACE(rp->rp_buflen);
3697 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3698 ADJUST_ARGS();
3699}
3700
1da177e4 3701int
2ebbc012 3702nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3703{
3704 return xdr_ressize_check(rqstp, p);
3705}
3706
3e98abff 3707int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3708{
3e98abff
BF		 3709 struct svc_rqst *rqstp = rq;
3710 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3711
1da177e4
LT		 3712 if (args->ops != args->iops) {
3713 kfree(args->ops);
3714 args->ops = args->iops;
3715 }
f99d49ad
JJ		 3716 kfree(args->tmpp);
3717 args->tmpp = NULL;
1da177e4
LT		 3718 while (args->to_free) {
3719 struct tmpbuf *tb = args->to_free;
3720 args->to_free = tb->next;
3721 tb->release(tb->buf);
3722 kfree(tb);
3723 }
3e98abff 3724 return 1;
1da177e4
LT		 3725}
3726
3727int
2ebbc012 3728nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3729{
1da177e4
LT		 3730 args->p = p;
3731 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3732 args->pagelist = rqstp->rq_arg.pages;
3733 args->pagelen = rqstp->rq_arg.page_len;
3734 args->tmpp = NULL;
3735 args->to_free = NULL;
3736 args->ops = args->iops;
3737 args->rqstp = rqstp;
3738
3e98abff 3739 return !nfsd4_decode_compound(args);
1da177e4
LT		 3740}
3741
3742int
2ebbc012 3743nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3744{
3745 /*
3746 * All that remains is to write the tag and operation count...
3747 */
557ce264 3748 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3749 struct kvec *iov;
3750 p = resp->tagp;
3751 *p++ = htonl(resp->taglen);
3752 memcpy(p, resp->tag, resp->taglen);
3753 p += XDR_QUADLEN(resp->taglen);
3754 *p++ = htonl(resp->opcnt);
3755
3756 if (rqstp->rq_res.page_len)
3757 iov = &rqstp->rq_res.tail[0];
3758 else
3759 iov = &rqstp->rq_res.head[0];
3760 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3761 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e 3762 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 3763 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3764 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 3765 if (cs->status != nfserr_replay_cache) {
3766 nfsd4_store_cache_entry(resp);
73e79482 3767 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3768 }
d7682988 3769 /* Renew the clientid on success and on replay */
f0f51f5c 3770 spin_lock(&nn->client_lock);
221a6876 3771 nfsd4_put_session(cs->session);
f0f51f5c
BF		 3772 spin_unlock(&nn->client_lock);
3773 put_client_renew(clp);
da3846a2 3774 }
1da177e4
LT		 3775 return 1;
3776}
3777
3778/*
3779 * Local variables:
3780 * c-basic-offset: 8
3781 * End:
3782 */
Linux 6.x block layer and io_uring tree(s)