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nfsd4: reserve head space for krb5 integ/priv info
[mirror_ubuntu-artful-kernel.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
1da177e4
LT		 106#define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109} while (0)
110#define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
817cb9d4
CL		 114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
1da177e4
LT		 116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119} while (0)
120#define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124
125/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126#define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
1da177e4
LT		 133 goto xdr_error; \
134 } \
135} while (0)
136
590b7431
BF		 137static void next_decode_page(struct nfsd4_compoundargs *argp)
138{
590b7431 139 argp->p = page_address(argp->pagelist[0]);
365da4ad 140 argp->pagelist++;
590b7431
BF		 141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148}
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4 176 memcpy(p, argp->p, avail);
590b7431 177 next_decode_page(argp);
1da177e4
LT		 178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181}
182
60adfc50
AA		 183static int zero_clientid(clientid_t *clid)
184{
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186}
187
2d8498db
CH		 188/**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2d8498db
CH		 213/**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
2ebbc012 223static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 224{
1da177e4 225 if (p == argp->tmp) {
67114fe6 226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 227 if (!p)
228 return NULL;
1da177e4 229 } else {
73dff8be 230 BUG_ON(p != argp->tmpp);
1da177e4
LT		 231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
a4db5fe5 234 kfree(p);
1da177e4
LT		 235 return NULL;
236 } else
237 return (char *)p;
238}
239
b37ad28b 240static __be32
1da177e4
LT		 241nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242{
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
7e705706 248 bmval[2] = 0;
1da177e4
LT		 249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
7e705706
AA		 260 if (bmlen > 2)
261 READ32(bmval[2]);
1da177e4
LT		 262
263 DECODE_TAIL;
264}
265
b37ad28b 266static __be32
3c8e0316 267nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
1da177e4
LT		 270{
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
1da177e4
LT		 280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 290 u32 nace;
28e05dd8 291 struct nfs4_ace *ace;
1da177e4
LT		 292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
28e05dd8 296 if (nace > NFS4_ACL_MAX)
798df338 297 return nfserr_fbig;
28e05dd8
BF		 298
299 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 300 if (*acl == NULL)
301 return nfserr_jukebox;
302
28e05dd8 303 defer_free(argp, kfree, *acl);
1da177e4 304
28e05dd8
BF		 305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 307 READ_BUF(16); len += 16;
28e05dd8
BF		 308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
1da177e4
LT		 311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
28e05dd8 315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 316 status = nfs_ok;
28e05dd8 317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 318 ;
28e05dd8 319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 320 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 321 buf, dummy32, &ace->who_gid);
1da177e4 322 else
3c726023 323 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_uid);
3c726023
BF		 325 if (status)
326 return status;
1da177e4
LT		 327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
47c85291
N		 344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
1da177e4
LT		 346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
47c85291
N		 355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
1da177e4
LT		 357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
bf8d9097 369 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
1da177e4
LT		 382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
bf8d9097 392 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
18032ca0
DQ		 405
406 label->len = 0;
407#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
3378b7f4 426 label->len = dummy32;
18032ca0
DQ		 427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430#endif
431
3c8e0316
YZ		 432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
1da177e4
LT		 437 goto xdr_error;
438
439 DECODE_TAIL;
1da177e4
LT		 440}
441
e31a1b66
BH		 442static __be32
443nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444{
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463}
464
acb2887e
BF		 465static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466{
467 DECODE_HEAD;
12fc3e92 468 u32 dummy, uid, gid;
acb2887e
BF		 469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
57569a70
BF		 476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
acb2887e
BF		 481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
12fc3e92
BF		 487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
12fc3e92
BF		 502 READ32(uid);
503 READ32(gid);
acb2887e
BF		 504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
12fc3e92 509 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
12fc3e92 520 }
acb2887e
BF		 521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543}
544
cb73a9f4
BF		 545static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546{
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554}
555
1d1bc8f2
BF		 556static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557{
558 DECODE_HEAD;
1d1bc8f2
BF		 559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
6ce2357f
BS		 563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
1d1bc8f2
BF		 565 DECODE_TAIL;
566}
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570{
571 DECODE_HEAD;
572
e31a1b66 573 READ_BUF(4);
1da177e4 574 READ32(close->cl_seqid);
e31a1b66 575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 576
577 DECODE_TAIL;
578}
579
580
b37ad28b 581static __be32
1da177e4
LT		 582nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583{
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591}
592
b37ad28b 593static __be32
1da177e4
LT		 594nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595{
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 625 return status;
626
3c8e0316 627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 628 &create->cr_acl, &create->cr_label);
c0d6fc8a 629 if (status)
1da177e4
LT		 630 goto out;
631
632 DECODE_TAIL;
633}
634
b37ad28b 635static inline __be32
1da177e4
LT		 636nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637{
e31a1b66 638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 639}
640
b37ad28b 641static inline __be32
1da177e4
LT		 642nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643{
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 656 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 657 return status;
658
659 DECODE_TAIL;
660}
661
b37ad28b 662static __be32
1da177e4
LT		 663nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664{
665 DECODE_HEAD;
666
1da177e4
LT		 667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
e31a1b66 680 READ_BUF(4);
1da177e4 681 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
e31a1b66
BH		 692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
1da177e4
LT		 696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700}
701
b37ad28b 702static __be32
1da177e4
LT		 703nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704{
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723{
724 DECODE_HEAD;
725
e31a1b66 726 READ_BUF(8);
1da177e4
LT		 727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
1da177e4
LT		 735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743{
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 751 return status;
752
753 DECODE_TAIL;
754}
755
2c8bd7e0 756static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 757{
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
2c8bd7e0
BH		 763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
04f9e664
BF		 768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
fc0d14fe 776 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
92bac8c5 792 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 793 if (!w)
794 return nfs_ok;
2c8bd7e0
BH		 795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
04f9e664
BF		 798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 803 return nfs_ok;
804 }
805xdr_error:
806 return nfserr_bad_xdr;
807}
808
809static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810{
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 816 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 817 return nfserr_bad_xdr;
818 return nfs_ok;
819xdr_error:
820 return nfserr_bad_xdr;
821}
822
a084daf5
BF		 823static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824{
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836xdr_error:
837 return nfserr_bad_xdr;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842{
843 DECODE_HEAD;
2c8bd7e0 844 u32 dummy;
1da177e4
LT		 845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
fe0750e5 848 open->op_openowner = NULL;
1da177e4 849
9d313b17 850 open->op_xdr_error = 0;
1da177e4 851 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 852 READ_BUF(4);
1da177e4 853 READ32(open->op_seqid);
2c8bd7e0
BH		 854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
04f9e664
BF		 857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
a084daf5 862 READ_BUF(sizeof(clientid_t));
1da177e4 863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
1da177e4
LT		 868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
c0d6fc8a 878 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 879 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 880 if (status)
1da177e4
LT		 881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 886 break;
79fb54ab
BH		 887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
ab4684d1
CL		 890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 892 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 893 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 894 if (status)
895 goto out;
896 break;
1da177e4
LT		 897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
1da177e4
LT		 927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 931 return status;
932 break;
8b289b2c
BF		 933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
1da177e4
LT		 946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951}
952
b37ad28b 953static __be32
1da177e4
LT		 954nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955{
956 DECODE_HEAD;
e1a90ebd
AS		 957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
e31a1b66
BH		 961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
1da177e4 965 READ32(open_conf->oc_seqid);
e1a90ebd 966
1da177e4
LT		 967 DECODE_TAIL;
968}
969
b37ad28b 970static __be32
1da177e4
LT		 971nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972{
973 DECODE_HEAD;
974
e31a1b66
BH		 975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
04f9e664 978 READ_BUF(4);
1da177e4 979 READ32(open_down->od_seqid);
2c8bd7e0
BH		 980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
04f9e664
BF		 982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
1da177e4
LT		 987 DECODE_TAIL;
988}
989
b37ad28b 990static __be32
1da177e4
LT		 991nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992{
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003}
1004
e1a90ebd
AS		 1005static __be32
1006nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007{
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011}
1012
b37ad28b 1013static __be32
1da177e4
LT		 1014nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015{
1016 DECODE_HEAD;
1017
e31a1b66
BH		 1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1da177e4
LT		 1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1036 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042}
1043
b37ad28b 1044static __be32
1da177e4
LT		 1045nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046{
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1054 return status;
1055
1056 DECODE_TAIL;
1057}
1058
b37ad28b 1059static __be32
1da177e4
LT		 1060nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061{
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1072 return status;
a36b1725 1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1074 return status;
1075
1076 DECODE_TAIL;
1077}
1078
b37ad28b 1079static __be32
1da177e4
LT		 1080nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081{
1082 DECODE_HEAD;
1083
e1a90ebd
AS		 1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1da177e4
LT		 1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091}
1092
dcb488a3
AA		 1093static __be32
1094nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096{
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107}
1108
04f4ad16
BF		 1109static __be32
1110nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112{
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118}
1119
b37ad28b 1120static __be32
1da177e4
LT		 1121nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122{
e31a1b66 1123 __be32 status;
1da177e4 1124
e31a1b66
BH		 1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
3c8e0316 1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1129 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1130}
1131
b37ad28b 1132static __be32
1da177e4
LT		 1133nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134{
1135 DECODE_HEAD;
1136
e1a90ebd
AS		 1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
ab4684d1
CL		 1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1142
a084daf5
BF		 1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1da177e4
LT		 1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159}
1160
b37ad28b 1161static __be32
1da177e4
LT		 1162nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163{
1164 DECODE_HEAD;
1165
e1a90ebd
AS		 1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
ab4684d1 1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1170 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1172
1173 DECODE_TAIL;
1174}
1175
1176/* Also used for NVERIFY */
b37ad28b 1177static __be32
1da177e4
LT		 1178nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179{
1da177e4
LT		 1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1186 * nfsd4_proc_verify */
1187
1da177e4
LT		 1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194}
1195
b37ad28b 1196static __be32
1da177e4
LT		 1197nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198{
1199 int avail;
1da177e4
LT		 1200 int len;
1201 DECODE_HEAD;
1202
e31a1b66
BH		 1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1da177e4
LT		 1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1da177e4
LT		 1221 goto xdr_error;
1222 }
70cc7f75
BF		 1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
70cc7f75 1225 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1226
1227 len = XDR_QUADLEN(write->wr_buflen) << 2;
1228 if (len >= avail) {
1229 int pages;
1230
1231 len -= avail;
1232
1233 pages = len >> PAGE_SHIFT;
1234 argp->pagelist += pages;
1235 argp->pagelen -= pages * PAGE_SIZE;
1236 len -= pages * PAGE_SIZE;
1237
1238 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1239 argp->pagelist++;
5a80a54d 1240 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1241 }
5a80a54d 1242 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1243
1244 DECODE_TAIL;
1245}
1246
b37ad28b 1247static __be32
1da177e4
LT		 1248nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1249{
1250 DECODE_HEAD;
1251
e1a90ebd
AS		 1252 if (argp->minorversion >= 1)
1253 return nfserr_notsupp;
1254
1da177e4
LT		 1255 READ_BUF(12);
1256 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1257 READ32(rlockowner->rl_owner.len);
1258 READ_BUF(rlockowner->rl_owner.len);
1259 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1260
60adfc50
AA		 1261 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1262 return nfserr_inval;
1da177e4
LT		 1263 DECODE_TAIL;
1264}
1265
2db134eb
AA		 1266static __be32
1267nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1268 struct nfsd4_exchange_id *exid)
2db134eb 1269{
5afa040b 1270 int dummy, tmp;
0733d213
AA		 1271 DECODE_HEAD;
1272
1273 READ_BUF(NFS4_VERIFIER_SIZE);
1274 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1275
a084daf5
BF		 1276 status = nfsd4_decode_opaque(argp, &exid->clname);
1277 if (status)
1278 return nfserr_bad_xdr;
0733d213
AA		 1279
1280 READ_BUF(4);
1281 READ32(exid->flags);
1282
1283 /* Ignore state_protect4_a */
1284 READ_BUF(4);
1285 READ32(exid->spa_how);
1286 switch (exid->spa_how) {
1287 case SP4_NONE:
1288 break;
1289 case SP4_MACH_CRED:
1290 /* spo_must_enforce */
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy * 4);
1294 p += dummy;
1295
1296 /* spo_must_allow */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy * 4);
1300 p += dummy;
1301 break;
1302 case SP4_SSV:
1303 /* ssp_ops */
1304 READ_BUF(4);
1305 READ32(dummy);
1306 READ_BUF(dummy * 4);
1307 p += dummy;
1308
1309 READ_BUF(4);
1310 READ32(dummy);
1311 READ_BUF(dummy * 4);
1312 p += dummy;
1313
1314 /* ssp_hash_algs<> */
1315 READ_BUF(4);
5afa040b
MJ		 1316 READ32(tmp);
1317 while (tmp--) {
1318 READ_BUF(4);
1319 READ32(dummy);
1320 READ_BUF(dummy);
1321 p += XDR_QUADLEN(dummy);
1322 }
0733d213
AA		 1323
1324 /* ssp_encr_algs<> */
1325 READ_BUF(4);
5afa040b
MJ		 1326 READ32(tmp);
1327 while (tmp--) {
1328 READ_BUF(4);
1329 READ32(dummy);
1330 READ_BUF(dummy);
1331 p += XDR_QUADLEN(dummy);
1332 }
0733d213
AA		 1333
1334 /* ssp_window and ssp_num_gss_handles */
1335 READ_BUF(8);
1336 READ32(dummy);
1337 READ32(dummy);
1338 break;
1339 default:
1340 goto xdr_error;
1341 }
1342
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1345 READ32(dummy);
1346
1347 if (dummy > 1)
1348 goto xdr_error;
1349
1350 if (dummy == 1) {
1351 /* nii_domain */
1352 READ_BUF(4);
1353 READ32(dummy);
1354 READ_BUF(dummy);
1355 p += XDR_QUADLEN(dummy);
1356
1357 /* nii_name */
1358 READ_BUF(4);
1359 READ32(dummy);
1360 READ_BUF(dummy);
1361 p += XDR_QUADLEN(dummy);
1362
1363 /* nii_date */
1364 READ_BUF(12);
1365 p += 3;
1366 }
1367 DECODE_TAIL;
2db134eb
AA		 1368}
1369
1370static __be32
1371nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1372 struct nfsd4_create_session *sess)
1373{
ec6b5d7b 1374 DECODE_HEAD;
ec6b5d7b 1375 u32 dummy;
ec6b5d7b
AA		 1376
1377 READ_BUF(16);
1378 COPYMEM(&sess->clientid, 8);
1379 READ32(sess->seqid);
1380 READ32(sess->flags);
1381
1382 /* Fore channel attrs */
1383 READ_BUF(28);
1384 READ32(dummy); /* headerpadsz is always 0 */
1385 READ32(sess->fore_channel.maxreq_sz);
1386 READ32(sess->fore_channel.maxresp_sz);
1387 READ32(sess->fore_channel.maxresp_cached);
1388 READ32(sess->fore_channel.maxops);
1389 READ32(sess->fore_channel.maxreqs);
1390 READ32(sess->fore_channel.nr_rdma_attrs);
1391 if (sess->fore_channel.nr_rdma_attrs == 1) {
1392 READ_BUF(4);
1393 READ32(sess->fore_channel.rdma_attrs);
1394 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1396 goto xdr_error;
1397 }
1398
1399 /* Back channel attrs */
1400 READ_BUF(28);
1401 READ32(dummy); /* headerpadsz is always 0 */
1402 READ32(sess->back_channel.maxreq_sz);
1403 READ32(sess->back_channel.maxresp_sz);
1404 READ32(sess->back_channel.maxresp_cached);
1405 READ32(sess->back_channel.maxops);
1406 READ32(sess->back_channel.maxreqs);
1407 READ32(sess->back_channel.nr_rdma_attrs);
1408 if (sess->back_channel.nr_rdma_attrs == 1) {
1409 READ_BUF(4);
1410 READ32(sess->back_channel.rdma_attrs);
1411 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1413 goto xdr_error;
1414 }
1415
acb2887e 1416 READ_BUF(4);
ec6b5d7b 1417 READ32(sess->callback_prog);
acb2887e 1418 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1419 DECODE_TAIL;
2db134eb
AA		 1420}
1421
1422static __be32
1423nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1424 struct nfsd4_destroy_session *destroy_session)
1425{
e10e0cfc
BH		 1426 DECODE_HEAD;
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1428 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1429
1430 DECODE_TAIL;
2db134eb
AA		 1431}
1432
e1ca12df
BS		 1433static __be32
1434nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_free_stateid *free_stateid)
1436{
1437 DECODE_HEAD;
1438
1439 READ_BUF(sizeof(stateid_t));
1440 READ32(free_stateid->fr_stateid.si_generation);
1441 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1442
1443 DECODE_TAIL;
1444}
1445
2db134eb
AA		 1446static __be32
1447nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1448 struct nfsd4_sequence *seq)
1449{
b85d4c01
BH		 1450 DECODE_HEAD;
1451
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1453 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1454 READ32(seq->seqid);
1455 READ32(seq->slotid);
1456 READ32(seq->maxslots);
1457 READ32(seq->cachethis);
1458
1459 DECODE_TAIL;
2db134eb
AA		 1460}
1461
17456804
BS		 1462static __be32
1463nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1464{
17456804 1465 int i;
03cfb420
BS		 1466 __be32 *p, status;
1467 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1468
1469 READ_BUF(4);
1470 test_stateid->ts_num_ids = ntohl(*p++);
1471
03cfb420 1472 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1473
1474 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1475 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1476 if (!stateid) {
afcf6792 1477 status = nfserrno(-ENOMEM);
03cfb420
BS		 1478 goto out;
1479 }
1480
1481 defer_free(argp, kfree, stateid);
1482 INIT_LIST_HEAD(&stateid->ts_id_list);
1483 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1484
1485 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1486 if (status)
03cfb420 1487 goto out;
17456804
BS		 1488 }
1489
1490 status = 0;
1491out:
1492 return status;
1493xdr_error:
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1495 status = nfserr_bad_xdr;
1496 goto out;
1497}
1498
345c2842
MJ		 1499static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1500{
1501 DECODE_HEAD;
1502
1503 READ_BUF(8);
1504 COPYMEM(&dc->clientid, 8);
1505
1506 DECODE_TAIL;
1507}
1508
4dc6ec00
BF		 1509static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1510{
1511 DECODE_HEAD;
1512
1513 READ_BUF(4);
1514 READ32(rc->rca_one_fs);
1515
1516 DECODE_TAIL;
1517}
1518
347e0ad9
BH		 1519static __be32
1520nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1521{
1522 return nfs_ok;
1523}
1524
3c375c6f
BH		 1525static __be32
1526nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1527{
1e685ec2 1528 return nfserr_notsupp;
3c375c6f
BH		 1529}
1530
347e0ad9
BH		 1531typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1532
1533static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1534 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1535 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1536 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1537 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1538 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1540 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1541 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1543 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1544 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1545 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1546 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1547 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1549 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1550 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1552 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1553 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1554 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1555 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1557 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1558 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1560 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1561 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1562 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1565 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1566 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1567 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1568 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1569 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1570 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1571
1572 /* new operations for NFSv4.1 */
cb73a9f4 1573 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1574 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1575 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1576 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1577 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1578 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1579 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1585 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1586 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1587 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1588 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1589 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1590 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1591 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1592};
1593
e1a90ebd
AS		 1594static inline bool
1595nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1596{
8217d146 1597 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1598 return false;
8217d146 1599 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1600 return false;
8217d146
AS		 1601 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1602 return false;
1603 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1604 return false;
1605 return true;
1606}
f2feb96b 1607
6ff40dec
BF		 1608/*
1609 * Return a rough estimate of the maximum possible reply size. Note the
1610 * estimate includes rpc headers so is meant to be passed to
1611 * svc_reserve, not svc_reserve_auth.
1612 *
1613 * Also note the current compound encoding permits only one operation to
1614 * use pages beyond the first one, so the maximum possible length is the
1615 * maximum over these values, not the sum.
1616 */
1617static int nfsd4_max_reply(u32 opnum)
1618{
1619 switch (opnum) {
1620 case OP_READLINK:
1621 case OP_READDIR:
1622 /*
1623 * Both of these ops take a single page for data and put
1624 * the head and tail in another page:
1625 */
1626 return 2 * PAGE_SIZE;
1627 case OP_READ:
1628 return INT_MAX;
1629 default:
1630 return PAGE_SIZE;
1631 }
1632}
1633
b37ad28b 1634static __be32
1da177e4
LT		 1635nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1636{
1637 DECODE_HEAD;
1638 struct nfsd4_op *op;
1091006c 1639 bool cachethis = false;
6ff40dec 1640 int max_reply = PAGE_SIZE;
1da177e4
LT		 1641 int i;
1642
1da177e4
LT		 1643 READ_BUF(4);
1644 READ32(argp->taglen);
1645 READ_BUF(argp->taglen + 8);
1646 SAVEMEM(argp->tag, argp->taglen);
1647 READ32(argp->minorversion);
1648 READ32(argp->opcnt);
1649
1650 if (argp->taglen > NFSD4_MAX_TAGLEN)
1651 goto xdr_error;
1652 if (argp->opcnt > 100)
1653 goto xdr_error;
1654
e8c96f8c 1655 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1656 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1657 if (!argp->ops) {
1658 argp->ops = argp->iops;
817cb9d4 1659 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1660 goto xdr_error;
1661 }
1662 }
1663
e1a90ebd 1664 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1665 argp->opcnt = 0;
1666
1da177e4
LT		 1667 for (i = 0; i < argp->opcnt; i++) {
1668 op = &argp->ops[i];
1669 op->replay = NULL;
1670
8a61b18c
BF		 1671 READ_BUF(4);
1672 READ32(op->opnum);
1da177e4 1673
e1a90ebd
AS		 1674 if (nfsd4_opnum_in_range(argp, op))
1675 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1676 else {
1da177e4
LT		 1677 op->opnum = OP_ILLEGAL;
1678 op->status = nfserr_op_illegal;
1da177e4 1679 }
1091006c
BF		 1680 /*
1681 * We'll try to cache the result in the DRC if any one
1682 * op in the compound wants to be cached:
1683 */
1684 cachethis |= nfsd4_cache_this_op(op);
6ff40dec
BF		 1685
1686 max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
e372ba60
BF		 1687
1688 if (op->status) {
1689 argp->opcnt = i+1;
1690 break;
1691 }
1da177e4 1692 }
1091006c
BF		 1693 /* Sessions make the DRC unnecessary: */
1694 if (argp->minorversion)
1695 cachethis = false;
6ff40dec
BF		 1696 if (max_reply != INT_MAX)
1697 svc_reserve(argp->rqstp, max_reply);
1091006c 1698 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1699
1700 DECODE_TAIL;
1701}
1da177e4 1702
1da177e4
LT		 1703#define WRITE32(n) *p++ = htonl(n)
1704#define WRITE64(n) do { \
1705 *p++ = htonl((u32)((n) >> 32)); \
1706 *p++ = htonl((u32)(n)); \
1707} while (0)
5108b276 1708#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1709 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1710 memcpy(p, ptr, nbytes); \
1711 p += XDR_QUADLEN(nbytes); \
5108b276 1712}} while (0)
c654b8a9
BF		 1713
1714static void write32(__be32 **p, u32 n)
1715{
45eaa1c1 1716 *(*p)++ = htonl(n);
c654b8a9
BF		 1717}
1718
1719static void write64(__be32 **p, u64 n)
1720{
45eaa1c1 1721 write32(p, (n >> 32));
c654b8a9
BF		 1722 write32(p, (u32)n);
1723}
1724
1725static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1726{
1727 if (IS_I_VERSION(inode)) {
1728 write64(p, inode->i_version);
1729 } else {
1730 write32(p, stat->ctime.tv_sec);
1731 write32(p, stat->ctime.tv_nsec);
1732 }
1733}
1734
1735static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1736{
1737 write32(p, c->atomic);
1738 if (c->change_supported) {
1739 write64(p, c->before_change);
1740 write64(p, c->after_change);
1741 } else {
1742 write32(p, c->before_ctime_sec);
1743 write32(p, c->before_ctime_nsec);
1744 write32(p, c->after_ctime_sec);
1745 write32(p, c->after_ctime_nsec);
1746 }
1747}
1da177e4
LT		 1748
1749#define RESERVE_SPACE(nbytes) do { \
4aea24b2
BF		 1750 p = resp->xdr.p; \
1751 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->xdr.end); \
1da177e4 1752} while (0)
4aea24b2 1753#define ADJUST_ARGS() resp->xdr.p = p
1da177e4 1754
81c3f413 1755/* Encode as an array of strings the string given with components
e7a0444a 1756 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1757 */
e7a0444a
WAA		 1758static __be32 nfsd4_encode_components_esc(char sep, char *components,
1759 __be32 **pp, int *buflen,
1760 char esc_enter, char esc_exit)
81c3f413 1761{
2ebbc012
AV		 1762 __be32 *p = *pp;
1763 __be32 *countp = p;
81c3f413 1764 int strlen, count=0;
e7a0444a 1765 char *str, *end, *next;
81c3f413
BF		 1766
1767 dprintk("nfsd4_encode_components(%s)\n", components);
1768 if ((*buflen -= 4) < 0)
1769 return nfserr_resource;
1770 WRITE32(0); /* We will fill this in with @count later */
1771 end = str = components;
1772 while (*end) {
e7a0444a
WAA		 1773 bool found_esc = false;
1774
1775 /* try to parse as esc_start, ..., esc_end, sep */
1776 if (*str == esc_enter) {
1777 for (; *end && (*end != esc_exit); end++)
1778 /* find esc_exit or end of string */;
1779 next = end + 1;
1780 if (*end && (!*next || *next == sep)) {
1781 str++;
1782 found_esc = true;
1783 }
1784 }
1785
1786 if (!found_esc)
1787 for (; *end && (*end != sep); end++)
1788 /* find sep or end of string */;
1789
81c3f413
BF		 1790 strlen = end - str;
1791 if (strlen) {
1792 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1793 return nfserr_resource;
1794 WRITE32(strlen);
1795 WRITEMEM(str, strlen);
1796 count++;
1797 }
1798 else
1799 end++;
1800 str = end;
1801 }
1802 *pp = p;
1803 p = countp;
1804 WRITE32(count);
1805 return 0;
1806}
1807
e7a0444a
WAA		 1808/* Encode as an array of strings the string given with components
1809 * separated @sep.
1810 */
1811static __be32 nfsd4_encode_components(char sep, char *components,
1812 __be32 **pp, int *buflen)
1813{
1814 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1815}
1816
81c3f413
BF		 1817/*
1818 * encode a location element of a fs_locations structure
1819 */
b37ad28b 1820static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1821 __be32 **pp, int *buflen)
81c3f413 1822{
b37ad28b 1823 __be32 status;
2ebbc012 1824 __be32 *p = *pp;
81c3f413 1825
e7a0444a
WAA		 1826 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1827 '[', ']');
81c3f413
BF		 1828 if (status)
1829 return status;
1830 status = nfsd4_encode_components('/', location->path, &p, buflen);
1831 if (status)
1832 return status;
1833 *pp = p;
1834 return 0;
1835}
1836
1837/*
ed748aac 1838 * Encode a path in RFC3530 'pathname4' format
81c3f413 1839 */
ed748aac
TM		 1840static __be32 nfsd4_encode_path(const struct path *root,
1841 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1842{
301f0268 1843 struct path cur = *path;
ed748aac
TM		 1844 __be32 *p = *pp;
1845 struct dentry **components = NULL;
1846 unsigned int ncomponents = 0;
1847 __be32 err = nfserr_jukebox;
81c3f413 1848
ed748aac 1849 dprintk("nfsd4_encode_components(");
81c3f413 1850
ed748aac
TM		 1851 path_get(&cur);
1852 /* First walk the path up to the nfsd root, and store the
1853 * dentries/path components in an array.
1854 */
1855 for (;;) {
1856 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1857 break;
1858 if (cur.dentry == cur.mnt->mnt_root) {
1859 if (follow_up(&cur))
1860 continue;
1861 goto out_free;
1862 }
1863 if ((ncomponents & 15) == 0) {
1864 struct dentry **new;
1865 new = krealloc(components,
1866 sizeof(*new) * (ncomponents + 16),
1867 GFP_KERNEL);
1868 if (!new)
1869 goto out_free;
1870 components = new;
1871 }
1872 components[ncomponents++] = cur.dentry;
1873 cur.dentry = dget_parent(cur.dentry);
1874 }
81c3f413 1875
ed748aac
TM		 1876 *buflen -= 4;
1877 if (*buflen < 0)
1878 goto out_free;
1879 WRITE32(ncomponents);
1880
1881 while (ncomponents) {
1882 struct dentry *dentry = components[ncomponents - 1];
301f0268 1883 unsigned int len;
ed748aac 1884
301f0268
AV		 1885 spin_lock(&dentry->d_lock);
1886 len = dentry->d_name.len;
ed748aac 1887 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
301f0268
AV		 1888 if (*buflen < 0) {
1889 spin_unlock(&dentry->d_lock);
ed748aac 1890 goto out_free;
301f0268 1891 }
ed748aac
TM		 1892 WRITE32(len);
1893 WRITEMEM(dentry->d_name.name, len);
1894 dprintk("/%s", dentry->d_name.name);
301f0268 1895 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1896 dput(dentry);
1897 ncomponents--;
81c3f413 1898 }
ed748aac
TM		 1899
1900 *pp = p;
1901 err = 0;
1902out_free:
1903 dprintk(")\n");
1904 while (ncomponents)
1905 dput(components[--ncomponents]);
1906 kfree(components);
1907 path_put(&cur);
1908 return err;
1909}
1910
1911static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1912 const struct path *path, __be32 **pp, int *buflen)
1913{
1914 struct svc_export *exp_ps;
1915 __be32 res;
1916
1917 exp_ps = rqst_find_fsidzero_export(rqstp);
1918 if (IS_ERR(exp_ps))
1919 return nfserrno(PTR_ERR(exp_ps));
1920 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1921 exp_put(exp_ps);
1922 return res;
81c3f413
BF		 1923}
1924
1925/*
1926 * encode a fs_locations structure
1927 */
b37ad28b 1928static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1929 struct svc_export *exp,
2ebbc012 1930 __be32 **pp, int *buflen)
81c3f413 1931{
b37ad28b 1932 __be32 status;
cc45f017 1933 int i;
2ebbc012 1934 __be32 *p = *pp;
81c3f413 1935 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1936
ed748aac 1937 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1938 if (status)
1939 return status;
1940 if ((*buflen -= 4) < 0)
1941 return nfserr_resource;
1942 WRITE32(fslocs->locations_count);
1943 for (i=0; i<fslocs->locations_count; i++) {
1944 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1945 &p, buflen);
1946 if (status)
1947 return status;
1948 }
1949 *pp = p;
1950 return 0;
1951}
1da177e4 1952
3d2544b1
BF		 1953static u32 nfs4_file_type(umode_t mode)
1954{
1955 switch (mode & S_IFMT) {
1956 case S_IFIFO: return NF4FIFO;
1957 case S_IFCHR: return NF4CHR;
1958 case S_IFDIR: return NF4DIR;
1959 case S_IFBLK: return NF4BLK;
1960 case S_IFLNK: return NF4LNK;
1961 case S_IFREG: return NF4REG;
1962 case S_IFSOCK: return NF4SOCK;
1963 default: return NF4BAD;
1964 };
1965}
1da177e4 1966
b37ad28b 1967static inline __be32
ab8e4aee 1968nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
2ebbc012 1969 __be32 **p, int *buflen)
1da177e4 1970{
3554116d
BF		 1971 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1972 return nfs4_acl_write_who(ace->whotype, p, buflen);
1973 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1974 return nfsd4_encode_group(rqstp, ace->who_gid, p, buflen);
1975 else
1976 return nfsd4_encode_user(rqstp, ace->who_uid, p, buflen);
1da177e4
LT		 1977}
1978
42ca0993
BF		 1979#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1980 FATTR4_WORD0_RDATTR_ERROR)
1981#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1982
18032ca0
DQ		 1983#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1984static inline __be32
1985nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
1986{
1987 __be32 *p = *pp;
1988
1989 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
1990 return nfserr_resource;
1991
1992 /*
1993 * For now we use a 0 here to indicate the null translation; in
1994 * the future we may place a call to translation code here.
1995 */
1996 if ((*buflen -= 8) < 0)
1997 return nfserr_resource;
1998
1999 WRITE32(0); /* lfs */
2000 WRITE32(0); /* pi */
2001 p = xdr_encode_opaque(p, context, len);
2002 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2003
2004 *pp = p;
2005 return 0;
2006}
2007#else
2008static inline __be32
ba4e55bb 2009nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
18032ca0
DQ		 2010{ return 0; }
2011#endif
2012
b37ad28b 2013static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2014{
2015 /* As per referral draft: */
2016 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2017 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2018 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2019 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2020 *rdattr_err = NFSERR_MOVED;
2021 else
2022 return nfserr_moved;
2023 }
2024 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2025 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2026 return 0;
2027}
1da177e4 2028
ae7095a7
BF		 2029
2030static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2031{
2032 struct path path = exp->ex_path;
2033 int err;
2034
2035 path_get(&path);
2036 while (follow_up(&path)) {
2037 if (path.dentry != path.mnt->mnt_root)
2038 break;
2039 }
3dadecce 2040 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2041 path_put(&path);
2042 return err;
2043}
2044
1da177e4
LT		 2045/*
2046 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2047 * ourselves.
1da177e4 2048 */
b37ad28b 2049__be32
d5184658
BF		 2050nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2051 struct svc_export *exp,
2052 struct dentry *dentry, u32 *bmval,
406a7ea9 2053 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2054{
2055 u32 bmval0 = bmval[0];
2056 u32 bmval1 = bmval[1];
7e705706 2057 u32 bmval2 = bmval[2];
1da177e4 2058 struct kstat stat;
d50e6136 2059 struct svc_fh *tempfh = NULL;
1da177e4 2060 struct kstatfs statfs;
d5184658
BF		 2061 __be32 *p = xdr->p;
2062 int buflen = xdr->buf->buflen;
2ebbc012 2063 __be32 *attrlenp;
1da177e4
LT		 2064 u32 dummy;
2065 u64 dummy64;
42ca0993 2066 u32 rdattr_err = 0;
b37ad28b 2067 __be32 status;
b8dd7b9a 2068 int err;
1da177e4
LT		 2069 int aclsupport = 0;
2070 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2071 void *context = NULL;
2072 int contextlen;
2073 bool contextsupport = false;
7e705706
AA		 2074 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2075 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2076 struct path path = {
2077 .mnt = exp->ex_path.mnt,
2078 .dentry = dentry,
2079 };
3d733711 2080 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2081
2082 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2083 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2084 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2085 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2086
42ca0993 2087 if (exp->ex_fslocs.migrated) {
7e705706 2088 BUG_ON(bmval[2]);
42ca0993
BF		 2089 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2090 if (status)
2091 goto out;
2092 }
2093
3dadecce 2094 err = vfs_getattr(&path, &stat);
b8dd7b9a 2095 if (err)
1da177e4 2096 goto out_nfserr;
a16e92ed
BF		 2097 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2098 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2099 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2100 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2101 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2102 if (err)
1da177e4
LT		 2103 goto out_nfserr;
2104 }
2105 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2106 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2107 status = nfserr_jukebox;
2108 if (!tempfh)
2109 goto out;
2110 fh_init(tempfh, NFS4_FHSIZE);
2111 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2112 if (status)
2113 goto out;
d50e6136 2114 fhp = tempfh;
1da177e4
LT		 2115 }
2116 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2117 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2118 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2119 aclsupport = (err == 0);
1da177e4 2120 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2121 if (err == -EOPNOTSUPP)
1da177e4 2122 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2123 else if (err == -EINVAL) {
1da177e4
LT		 2124 status = nfserr_attrnotsupp;
2125 goto out;
b8dd7b9a 2126 } else if (err != 0)
1da177e4
LT		 2127 goto out_nfserr;
2128 }
2129 }
1da177e4 2130
18032ca0
DQ		 2131#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2132 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2133 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2134 err = security_inode_getsecctx(dentry->d_inode,
2135 &context, &contextlen);
2136 contextsupport = (err == 0);
2137 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2138 if (err == -EOPNOTSUPP)
2139 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2140 else if (err)
2141 goto out_nfserr;
2142 }
2143 }
2144#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2145
2b44f1ba
BH		 2146 if (bmval2) {
2147 if ((buflen -= 16) < 0)
2148 goto out_resource;
7e705706
AA		 2149 WRITE32(3);
2150 WRITE32(bmval0);
2151 WRITE32(bmval1);
2152 WRITE32(bmval2);
2b44f1ba
BH		 2153 } else if (bmval1) {
2154 if ((buflen -= 12) < 0)
2155 goto out_resource;
7e705706
AA		 2156 WRITE32(2);
2157 WRITE32(bmval0);
2158 WRITE32(bmval1);
2159 } else {
2b44f1ba
BH		 2160 if ((buflen -= 8) < 0)
2161 goto out_resource;
7e705706
AA		 2162 WRITE32(1);
2163 WRITE32(bmval0);
2164 }
1da177e4
LT		 2165 attrlenp = p++; /* to be backfilled later */
2166
2167 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2168 u32 word0 = nfsd_suppattrs0(minorversion);
2169 u32 word1 = nfsd_suppattrs1(minorversion);
2170 u32 word2 = nfsd_suppattrs2(minorversion);
2171
42ca0993
BF		 2172 if (!aclsupport)
2173 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2174 if (!contextsupport)
2175 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2176 if (!word2) {
2b44f1ba
BH		 2177 if ((buflen -= 12) < 0)
2178 goto out_resource;
7e705706
AA		 2179 WRITE32(2);
2180 WRITE32(word0);
2181 WRITE32(word1);
2182 } else {
2b44f1ba
BH		 2183 if ((buflen -= 16) < 0)
2184 goto out_resource;
7e705706
AA		 2185 WRITE32(3);
2186 WRITE32(word0);
2187 WRITE32(word1);
2188 WRITE32(word2);
2189 }
1da177e4
LT		 2190 }
2191 if (bmval0 & FATTR4_WORD0_TYPE) {
2192 if ((buflen -= 4) < 0)
2193 goto out_resource;
3d2544b1 2194 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2195 if (dummy == NF4BAD) {
2196 status = nfserr_serverfault;
2197 goto out;
2198 }
1da177e4
LT		 2199 WRITE32(dummy);
2200 }
2201 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2202 if ((buflen -= 4) < 0)
2203 goto out_resource;
49640001 2204 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2205 WRITE32(NFS4_FH_PERSISTENT);
49640001 2206 else
e34ac862 2207 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2208 }
2209 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2210 if ((buflen -= 8) < 0)
2211 goto out_resource;
c654b8a9 2212 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2213 }
2214 if (bmval0 & FATTR4_WORD0_SIZE) {
2215 if ((buflen -= 8) < 0)
2216 goto out_resource;
2217 WRITE64(stat.size);
2218 }
2219 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2220 if ((buflen -= 4) < 0)
2221 goto out_resource;
2222 WRITE32(1);
2223 }
2224 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2225 if ((buflen -= 4) < 0)
2226 goto out_resource;
2227 WRITE32(1);
2228 }
2229 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2230 if ((buflen -= 4) < 0)
2231 goto out_resource;
2232 WRITE32(0);
2233 }
2234 if (bmval0 & FATTR4_WORD0_FSID) {
2235 if ((buflen -= 16) < 0)
2236 goto out_resource;
42ca0993
BF		 2237 if (exp->ex_fslocs.migrated) {
2238 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2239 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2240 } else switch(fsid_source(fhp)) {
2241 case FSIDSOURCE_FSID:
1da177e4
LT		 2242 WRITE64((u64)exp->ex_fsid);
2243 WRITE64((u64)0);
af6a4e28
N		 2244 break;
2245 case FSIDSOURCE_DEV:
1da177e4
LT		 2246 WRITE32(0);
2247 WRITE32(MAJOR(stat.dev));
2248 WRITE32(0);
2249 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2250 break;
2251 case FSIDSOURCE_UUID:
2252 WRITEMEM(exp->ex_uuid, 16);
2253 break;
1da177e4
LT		 2254 }
2255 }
2256 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2257 if ((buflen -= 4) < 0)
2258 goto out_resource;
2259 WRITE32(0);
2260 }
2261 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2262 if ((buflen -= 4) < 0)
2263 goto out_resource;
3d733711 2264 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2265 }
2266 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2267 if ((buflen -= 4) < 0)
2268 goto out_resource;
42ca0993 2269 WRITE32(rdattr_err);
1da177e4
LT		 2270 }
2271 if (bmval0 & FATTR4_WORD0_ACL) {
2272 struct nfs4_ace *ace;
1da177e4
LT		 2273
2274 if (acl == NULL) {
2275 if ((buflen -= 4) < 0)
2276 goto out_resource;
2277
2278 WRITE32(0);
2279 goto out_acl;
2280 }
2281 if ((buflen -= 4) < 0)
2282 goto out_resource;
2283 WRITE32(acl->naces);
2284
28e05dd8 2285 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2286 if ((buflen -= 4*3) < 0)
2287 goto out_resource;
2288 WRITE32(ace->type);
2289 WRITE32(ace->flag);
2290 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ab8e4aee 2291 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
1da177e4
LT		 2292 if (status)
2293 goto out;
2294 }
2295 }
2296out_acl:
2297 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2298 if ((buflen -= 4) < 0)
2299 goto out_resource;
2300 WRITE32(aclsupport ?
2301 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2302 }
2303 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2304 if ((buflen -= 4) < 0)
2305 goto out_resource;
2306 WRITE32(1);
2307 }
2308 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2309 if ((buflen -= 4) < 0)
2310 goto out_resource;
2930d381 2311 WRITE32(0);
1da177e4
LT		 2312 }
2313 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2314 if ((buflen -= 4) < 0)
2315 goto out_resource;
2316 WRITE32(1);
2317 }
2318 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2319 if ((buflen -= 4) < 0)
2320 goto out_resource;
2321 WRITE32(1);
2322 }
2323 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2324 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2325 if (buflen < 0)
2326 goto out_resource;
2327 WRITE32(fhp->fh_handle.fh_size);
2328 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2329 }
2330 if (bmval0 & FATTR4_WORD0_FILEID) {
2331 if ((buflen -= 8) < 0)
2332 goto out_resource;
40ee5dc6 2333 WRITE64(stat.ino);
1da177e4
LT		 2334 }
2335 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2336 if ((buflen -= 8) < 0)
2337 goto out_resource;
2338 WRITE64((u64) statfs.f_ffree);
2339 }
2340 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2341 if ((buflen -= 8) < 0)
2342 goto out_resource;
2343 WRITE64((u64) statfs.f_ffree);
2344 }
2345 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2346 if ((buflen -= 8) < 0)
2347 goto out_resource;
2348 WRITE64((u64) statfs.f_files);
2349 }
81c3f413
BF		 2350 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2351 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
81c3f413
BF		 2352 if (status)
2353 goto out;
2354 }
1da177e4
LT		 2355 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2356 if ((buflen -= 4) < 0)
2357 goto out_resource;
2358 WRITE32(1);
2359 }
2360 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2361 if ((buflen -= 8) < 0)
2362 goto out_resource;
aea240f4 2363 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2364 }
2365 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2366 if ((buflen -= 4) < 0)
2367 goto out_resource;
2368 WRITE32(255);
2369 }
2370 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2371 if ((buflen -= 4) < 0)
2372 goto out_resource;
a16e92ed 2373 WRITE32(statfs.f_namelen);
1da177e4
LT		 2374 }
2375 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2376 if ((buflen -= 8) < 0)
2377 goto out_resource;
7adae489 2378 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2379 }
2380 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2381 if ((buflen -= 8) < 0)
2382 goto out_resource;
7adae489 2383 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2384 }
2385 if (bmval1 & FATTR4_WORD1_MODE) {
2386 if ((buflen -= 4) < 0)
2387 goto out_resource;
2388 WRITE32(stat.mode & S_IALLUGO);
2389 }
2390 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2391 if ((buflen -= 4) < 0)
2392 goto out_resource;
2393 WRITE32(1);
2394 }
2395 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2396 if ((buflen -= 4) < 0)
2397 goto out_resource;
2398 WRITE32(stat.nlink);
2399 }
2400 if (bmval1 & FATTR4_WORD1_OWNER) {
2401 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1da177e4
LT		 2402 if (status)
2403 goto out;
2404 }
2405 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2406 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1da177e4
LT		 2407 if (status)
2408 goto out;
2409 }
2410 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2411 if ((buflen -= 8) < 0)
2412 goto out_resource;
2413 WRITE32((u32) MAJOR(stat.rdev));
2414 WRITE32((u32) MINOR(stat.rdev));
2415 }
2416 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2417 if ((buflen -= 8) < 0)
2418 goto out_resource;
2419 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2420 WRITE64(dummy64);
2421 }
2422 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2423 if ((buflen -= 8) < 0)
2424 goto out_resource;
2425 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2426 WRITE64(dummy64);
2427 }
2428 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2429 if ((buflen -= 8) < 0)
2430 goto out_resource;
2431 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2432 WRITE64(dummy64);
2433 }
2434 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2435 if ((buflen -= 8) < 0)
2436 goto out_resource;
2437 dummy64 = (u64)stat.blocks << 9;
2438 WRITE64(dummy64);
2439 }
2440 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2441 if ((buflen -= 12) < 0)
2442 goto out_resource;
bf8d9097 2443 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2444 WRITE32(stat.atime.tv_nsec);
2445 }
2446 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2447 if ((buflen -= 12) < 0)
2448 goto out_resource;
2449 WRITE32(0);
2450 WRITE32(1);
2451 WRITE32(0);
2452 }
2453 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2454 if ((buflen -= 12) < 0)
2455 goto out_resource;
bf8d9097 2456 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2457 WRITE32(stat.ctime.tv_nsec);
2458 }
2459 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2460 if ((buflen -= 12) < 0)
2461 goto out_resource;
bf8d9097 2462 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2463 WRITE32(stat.mtime.tv_nsec);
2464 }
2465 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2466 if ((buflen -= 8) < 0)
2467 goto out_resource;
406a7ea9
FF		 2468 /*
2469 * Get parent's attributes if not ignoring crossmount
2470 * and this is the root of a cross-mounted filesystem.
2471 */
2472 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2473 dentry == exp->ex_path.mnt->mnt_root)
2474 get_parent_attributes(exp, &stat);
40ee5dc6 2475 WRITE64(stat.ino);
1da177e4 2476 }
18032ca0
DQ		 2477 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2478 status = nfsd4_encode_security_label(rqstp, context,
2479 contextlen, &p, &buflen);
2480 if (status)
2481 goto out;
2482 }
8c18f205 2483 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
de3997a7
BF		 2484 if ((buflen -= 16) < 0)
2485 goto out_resource;
8c18f205
BH		 2486 WRITE32(3);
2487 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2488 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2489 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2490 }
7e705706 2491
1da177e4 2492 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
d5184658 2493 xdr->p = p;
1da177e4
LT		 2494 status = nfs_ok;
2495
2496out:
ba4e55bb 2497#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2498 if (context)
2499 security_release_secctx(context, contextlen);
ba4e55bb 2500#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2501 kfree(acl);
18df11d0 2502 if (tempfh) {
d50e6136 2503 fh_put(tempfh);
18df11d0
YZ		 2504 kfree(tempfh);
2505 }
1da177e4
LT		 2506 return status;
2507out_nfserr:
b8dd7b9a 2508 status = nfserrno(err);
1da177e4
LT		 2509 goto out;
2510out_resource:
1da177e4
LT		 2511 status = nfserr_resource;
2512 goto out;
1da177e4
LT		 2513}
2514
d5184658
BF		 2515__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2516 struct svc_fh *fhp, struct svc_export *exp,
2517 struct dentry *dentry, u32 *bmval,
2518 struct svc_rqst *rqstp, int ignore_crossmnt)
2519{
2520 struct xdr_buf dummy = {
2521 .head[0] = {
2522 .iov_base = *p,
2523 },
2524 .buflen = words << 2,
2525 };
2526 struct xdr_stream xdr;
2527 __be32 ret;
2528
2529 xdr_init_encode(&xdr, &dummy, NULL);
2530 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2531 ignore_crossmnt);
2532 *p = xdr.p;
2533 return ret;
2534}
2535
c0ce6ec8
BF		 2536static inline int attributes_need_mount(u32 *bmval)
2537{
2538 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2539 return 1;
2540 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2541 return 1;
2542 return 0;
2543}
2544
b37ad28b 2545static __be32
1da177e4 2546nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2547 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2548{
2549 struct svc_export *exp = cd->rd_fhp->fh_export;
2550 struct dentry *dentry;
b37ad28b 2551 __be32 nfserr;
406a7ea9 2552 int ignore_crossmnt = 0;
1da177e4
LT		 2553
2554 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2555 if (IS_ERR(dentry))
2556 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2557 if (!dentry->d_inode) {
2558 /*
2559 * nfsd_buffered_readdir drops the i_mutex between
2560 * readdir and calling this callback, leaving a window
2561 * where this directory entry could have gone away.
2562 */
2563 dput(dentry);
2564 return nfserr_noent;
2565 }
1da177e4
LT		 2566
2567 exp_get(exp);
406a7ea9
FF		 2568 /*
2569 * In the case of a mountpoint, the client may be asking for
2570 * attributes that are only properties of the underlying filesystem
2571 * as opposed to the cross-mounted file system. In such a case,
2572 * we will not follow the cross mount and will fill the attribtutes
2573 * directly from the mountpoint dentry.
2574 */
3227fa41 2575 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2576 int err;
2577
3227fa41
BF		 2578 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2579 && !attributes_need_mount(cd->rd_bmval)) {
2580 ignore_crossmnt = 1;
2581 goto out_encode;
2582 }
dcb488a3
AA		 2583 /*
2584 * Why the heck aren't we just using nfsd_lookup??
2585 * Different "."/".." handling? Something else?
2586 * At least, add a comment here to explain....
2587 */
021d3a72
BF		 2588 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2589 if (err) {
2590 nfserr = nfserrno(err);
1da177e4
LT		 2591 goto out_put;
2592 }
dcb488a3
AA		 2593 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2594 if (nfserr)
2595 goto out_put;
1da177e4
LT		 2596
2597 }
3227fa41 2598out_encode:
d5184658
BF		 2599 nfserr = nfsd4_encode_fattr_to_buf(p, buflen, NULL, exp, dentry,
2600 cd->rd_bmval,
406a7ea9 2601 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2602out_put:
2603 dput(dentry);
2604 exp_put(exp);
2605 return nfserr;
2606}
2607
2ebbc012 2608static __be32 *
b37ad28b 2609nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2610{
1da177e4
LT		 2611 if (buflen < 6)
2612 return NULL;
2613 *p++ = htonl(2);
2614 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2615 *p++ = htonl(0); /* bmval1 */
2616
87915c64 2617 *p++ = htonl(4); /* attribute length */
1da177e4 2618 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2619 return p;
2620}
2621
2622static int
a0ad13ef
N		 2623nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2624 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2625{
a0ad13ef 2626 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2627 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2628 int buflen;
2ebbc012 2629 __be32 *p = cd->buffer;
b2c0cea6 2630 __be32 *cookiep;
b37ad28b 2631 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2632
2633 /* In nfsv4, "." and ".." never make it onto the wire.. */
2634 if (name && isdotent(name, namlen)) {
2635 cd->common.err = nfs_ok;
2636 return 0;
2637 }
2638
2639 if (cd->offset)
2640 xdr_encode_hyper(cd->offset, (u64) offset);
2641
2642 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2643 if (buflen < 0)
2644 goto fail;
2645
2646 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2647 cookiep = p;
1da177e4
LT		 2648 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2649 p = xdr_encode_array(p, name, namlen); /* name length & name */
2650
84822d0b 2651 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2652 switch (nfserr) {
2653 case nfs_ok:
1da177e4
LT		 2654 break;
2655 case nfserr_resource:
2656 nfserr = nfserr_toosmall;
2657 goto fail;
b2c0cea6
BF		 2658 case nfserr_noent:
2659 goto skip_entry;
1da177e4
LT		 2660 default:
2661 /*
2662 * If the client requested the RDATTR_ERROR attribute,
2663 * we stuff the error code into this attribute
2664 * and continue. If this attribute was not requested,
2665 * then in accordance with the spec, we fail the
2666 * entire READDIR operation(!)
2667 */
2668 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2669 goto fail;
1da177e4 2670 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2671 if (p == NULL) {
2672 nfserr = nfserr_toosmall;
1da177e4 2673 goto fail;
34081efc 2674 }
1da177e4
LT		 2675 }
2676 cd->buflen -= (p - cd->buffer);
2677 cd->buffer = p;
b2c0cea6
BF		 2678 cd->offset = cookiep;
2679skip_entry:
1da177e4
LT		 2680 cd->common.err = nfs_ok;
2681 return 0;
2682fail:
2683 cd->common.err = nfserr;
2684 return -EINVAL;
2685}
2686
e2f282b9
BH		 2687static void
2688nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2689{
bc749ca4 2690 __be32 *p;
e2f282b9
BH		 2691
2692 RESERVE_SPACE(sizeof(stateid_t));
2693 WRITE32(sid->si_generation);
2694 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2695 ADJUST_ARGS();
2696}
2697
695e12f8 2698static __be32
b37ad28b 2699nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2700{
bc749ca4 2701 __be32 *p;
1da177e4
LT		 2702
2703 if (!nfserr) {
2704 RESERVE_SPACE(8);
2705 WRITE32(access->ac_supported);
2706 WRITE32(access->ac_resp_access);
2707 ADJUST_ARGS();
2708 }
695e12f8 2709 return nfserr;
1da177e4
LT		 2710}
2711
1d1bc8f2
BF		 2712static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2713{
2714 __be32 *p;
2715
2716 if (!nfserr) {
2717 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2718 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2719 WRITE32(bcts->dir);
6e67b5d1 2720 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2721 WRITE32(0);
2722 ADJUST_ARGS();
2723 }
2724 return nfserr;
2725}
2726
695e12f8 2727static __be32
b37ad28b 2728nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2729{
e2f282b9
BH		 2730 if (!nfserr)
2731 nfsd4_encode_stateid(resp, &close->cl_stateid);
2732
695e12f8 2733 return nfserr;
1da177e4
LT		 2734}
2735
2736
695e12f8 2737static __be32
b37ad28b 2738nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2739{
bc749ca4 2740 __be32 *p;
1da177e4
LT		 2741
2742 if (!nfserr) {
ab4684d1
CL		 2743 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2744 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2745 ADJUST_ARGS();
2746 }
695e12f8 2747 return nfserr;
1da177e4
LT		 2748}
2749
695e12f8 2750static __be32
b37ad28b 2751nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2752{
bc749ca4 2753 __be32 *p;
1da177e4
LT		 2754
2755 if (!nfserr) {
2756 RESERVE_SPACE(32);
c654b8a9 2757 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2758 WRITE32(2);
2759 WRITE32(create->cr_bmval[0]);
2760 WRITE32(create->cr_bmval[1]);
2761 ADJUST_ARGS();
2762 }
695e12f8 2763 return nfserr;
1da177e4
LT		 2764}
2765
b37ad28b
AV		 2766static __be32
2767nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2768{
2769 struct svc_fh *fhp = getattr->ga_fhp;
d5184658
BF		 2770 struct xdr_stream *xdr = &resp->xdr;
2771 struct xdr_buf *buf = resp->xdr.buf;
1da177e4
LT		 2772
2773 if (nfserr)
2774 return nfserr;
2775
d5184658
BF		 2776 buf->buflen = (void *)resp->xdr.end - (void *)resp->xdr.p
2777 - COMPOUND_ERR_SLACK_SPACE;
2778 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2779 getattr->ga_bmval,
406a7ea9 2780 resp->rqstp, 0);
1da177e4
LT		 2781 return nfserr;
2782}
2783
695e12f8
BH		 2784static __be32
2785nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2786{
695e12f8 2787 struct svc_fh *fhp = *fhpp;
1da177e4 2788 unsigned int len;
bc749ca4 2789 __be32 *p;
1da177e4
LT		 2790
2791 if (!nfserr) {
2792 len = fhp->fh_handle.fh_size;
2793 RESERVE_SPACE(len + 4);
2794 WRITE32(len);
2795 WRITEMEM(&fhp->fh_handle.fh_base, len);
2796 ADJUST_ARGS();
2797 }
695e12f8 2798 return nfserr;
1da177e4
LT		 2799}
2800
2801/*
2802* Including all fields other than the name, a LOCK4denied structure requires
2803* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2804*/
2805static void
2806nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2807{
7c13f344 2808 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2809 __be32 *p;
1da177e4 2810
7c13f344 2811 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2812 WRITE64(ld->ld_start);
2813 WRITE64(ld->ld_length);
2814 WRITE32(ld->ld_type);
7c13f344 2815 if (conf->len) {
1da177e4 2816 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2817 WRITE32(conf->len);
2818 WRITEMEM(conf->data, conf->len);
2819 kfree(conf->data);
1da177e4
LT		 2820 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2821 WRITE64((u64)0); /* clientid */
2822 WRITE32(0); /* length of owner name */
2823 }
2824 ADJUST_ARGS();
2825}
2826
695e12f8 2827static __be32
b37ad28b 2828nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2829{
e2f282b9
BH		 2830 if (!nfserr)
2831 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2832 else if (nfserr == nfserr_denied)
1da177e4
LT		 2833 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2834
695e12f8 2835 return nfserr;
1da177e4
LT		 2836}
2837
695e12f8 2838static __be32
b37ad28b 2839nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2840{
2841 if (nfserr == nfserr_denied)
2842 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2843 return nfserr;
1da177e4
LT		 2844}
2845
695e12f8 2846static __be32
b37ad28b 2847nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2848{
e2f282b9
BH		 2849 if (!nfserr)
2850 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2851
695e12f8 2852 return nfserr;
1da177e4
LT		 2853}
2854
2855
695e12f8 2856static __be32
b37ad28b 2857nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2858{
bc749ca4 2859 __be32 *p;
1da177e4
LT		 2860
2861 if (!nfserr) {
2862 RESERVE_SPACE(20);
c654b8a9 2863 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2864 ADJUST_ARGS();
2865 }
695e12f8 2866 return nfserr;
1da177e4
LT		 2867}
2868
2869
695e12f8 2870static __be32
b37ad28b 2871nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2872{
bc749ca4 2873 __be32 *p;
1da177e4
LT		 2874
2875 if (nfserr)
2876 goto out;
2877
e2f282b9
BH		 2878 nfsd4_encode_stateid(resp, &open->op_stateid);
2879 RESERVE_SPACE(40);
c654b8a9 2880 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2881 WRITE32(open->op_rflags);
2882 WRITE32(2);
2883 WRITE32(open->op_bmval[0]);
2884 WRITE32(open->op_bmval[1]);
2885 WRITE32(open->op_delegate_type);
2886 ADJUST_ARGS();
2887
2888 switch (open->op_delegate_type) {
2889 case NFS4_OPEN_DELEGATE_NONE:
2890 break;
2891 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2892 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2893 RESERVE_SPACE(20);
7b190fec 2894 WRITE32(open->op_recall);
1da177e4
LT		 2895
2896 /*
2897 * TODO: ACE's in delegations
2898 */
2899 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2900 WRITE32(0);
2901 WRITE32(0);
2902 WRITE32(0); /* XXX: is NULL principal ok? */
2903 ADJUST_ARGS();
2904 break;
2905 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2906 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2907 RESERVE_SPACE(32);
1da177e4
LT		 2908 WRITE32(0);
2909
2910 /*
2911 * TODO: space_limit's in delegations
2912 */
2913 WRITE32(NFS4_LIMIT_SIZE);
2914 WRITE32(~(u32)0);
2915 WRITE32(~(u32)0);
2916
2917 /*
2918 * TODO: ACE's in delegations
2919 */
2920 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2921 WRITE32(0);
2922 WRITE32(0);
2923 WRITE32(0); /* XXX: is NULL principal ok? */
2924 ADJUST_ARGS();
2925 break;
d24433cd
BH		 2926 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2927 switch (open->op_why_no_deleg) {
2928 case WND4_CONTENTION:
2929 case WND4_RESOURCE:
2930 RESERVE_SPACE(8);
2931 WRITE32(open->op_why_no_deleg);
2932 WRITE32(0); /* deleg signaling not supported yet */
2933 break;
2934 default:
2935 RESERVE_SPACE(4);
2936 WRITE32(open->op_why_no_deleg);
2937 }
2938 ADJUST_ARGS();
2939 break;
1da177e4
LT		 2940 default:
2941 BUG();
2942 }
2943 /* XXX save filehandle here */
2944out:
695e12f8 2945 return nfserr;
1da177e4
LT		 2946}
2947
695e12f8 2948static __be32
b37ad28b 2949nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 2950{
e2f282b9
BH		 2951 if (!nfserr)
2952 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2953
695e12f8 2954 return nfserr;
1da177e4
LT		 2955}
2956
695e12f8 2957static __be32
b37ad28b 2958nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 2959{
e2f282b9
BH		 2960 if (!nfserr)
2961 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2962
695e12f8 2963 return nfserr;
1da177e4
LT		 2964}
2965
b37ad28b
AV		 2966static __be32
2967nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2968 struct nfsd4_read *read)
1da177e4
LT		 2969{
2970 u32 eof;
afc59400
BF		 2971 int v;
2972 struct page *page;
1da177e4
LT		 2973 unsigned long maxcount;
2974 long len;
bc749ca4 2975 __be32 *p;
1da177e4
LT		 2976
2977 if (nfserr)
2978 return nfserr;
4aea24b2 2979 if (resp->xdr.buf->page_len)
1da177e4
LT		 2980 return nfserr_resource;
2981
2982 RESERVE_SPACE(8); /* eof flag and byte count */
2983
7adae489 2984 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2985 if (maxcount > read->rd_length)
2986 maxcount = read->rd_length;
2987
2988 len = maxcount;
2989 v = 0;
2990 while (len > 0) {
afc59400
BF		 2991 page = *(resp->rqstp->rq_next_page);
2992 if (!page) { /* ran out of pages */
d5f50b0c
BF		 2993 maxcount -= len;
2994 break;
2995 }
afc59400 2996 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 2997 resp->rqstp->rq_vec[v].iov_len =
44524359 2998 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 2999 resp->rqstp->rq_next_page++;
1da177e4
LT		 3000 v++;
3001 len -= PAGE_SIZE;
3002 }
3003 read->rd_vlen = v;
3004
039a87ca 3005 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 3006 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 3007 &maxcount);
3008
1da177e4
LT		 3009 if (nfserr)
3010 return nfserr;
44524359
N		 3011 eof = (read->rd_offset + maxcount >=
3012 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 3013
3014 WRITE32(eof);
3015 WRITE32(maxcount);
3016 ADJUST_ARGS();
4aea24b2
BF		 3017 resp->xdr.buf->head[0].iov_len = (char *)p
3018 - (char *)resp->xdr.buf->head[0].iov_base;
3019 resp->xdr.buf->page_len = maxcount;
1da177e4 3020
6ed6decc 3021 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3022 resp->xdr.buf->tail[0].iov_base = p;
3023 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3024 if (maxcount&3) {
6ed6decc
N		 3025 RESERVE_SPACE(4);
3026 WRITE32(0);
4aea24b2
BF		 3027 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3028 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3029 ADJUST_ARGS();
1da177e4
LT		 3030 }
3031 return 0;
3032}
3033
b37ad28b
AV		 3034static __be32
3035nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3036{
3037 int maxcount;
3038 char *page;
bc749ca4 3039 __be32 *p;
1da177e4
LT		 3040
3041 if (nfserr)
3042 return nfserr;
4aea24b2 3043 if (resp->xdr.buf->page_len)
1da177e4 3044 return nfserr_resource;
afc59400 3045 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3046 return nfserr_resource;
1da177e4 3047
afc59400 3048 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3049
3050 maxcount = PAGE_SIZE;
3051 RESERVE_SPACE(4);
3052
3053 /*
3054 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3055 * if they would overflow the buffer. Is this kosher in NFSv4? If
3056 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3057 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3058 */
3059 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3060 if (nfserr == nfserr_isdir)
3061 return nfserr_inval;
3062 if (nfserr)
3063 return nfserr;
3064
3065 WRITE32(maxcount);
3066 ADJUST_ARGS();
4aea24b2
BF		 3067 resp->xdr.buf->head[0].iov_len = (char *)p
3068 - (char *)resp->xdr.buf->head[0].iov_base;
3069 resp->xdr.buf->page_len = maxcount;
1da177e4 3070
6ed6decc 3071 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3072 resp->xdr.buf->tail[0].iov_base = p;
3073 resp->xdr.buf->tail[0].iov_len = 0;
1da177e4 3074 if (maxcount&3) {
6ed6decc
N		 3075 RESERVE_SPACE(4);
3076 WRITE32(0);
4aea24b2
BF		 3077 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3078 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3079 ADJUST_ARGS();
1da177e4
LT		 3080 }
3081 return 0;
3082}
3083
b37ad28b
AV		 3084static __be32
3085nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3086{
3087 int maxcount;
3088 loff_t offset;
2ebbc012 3089 __be32 *page, *savep, *tailbase;
bc749ca4 3090 __be32 *p;
1da177e4
LT		 3091
3092 if (nfserr)
3093 return nfserr;
4aea24b2 3094 if (resp->xdr.buf->page_len)
1da177e4 3095 return nfserr_resource;
afc59400 3096 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3097 return nfserr_resource;
1da177e4 3098
ab4684d1 3099 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3100 savep = p;
3101
3102 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3103 WRITE32(0);
3104 WRITE32(0);
3105 ADJUST_ARGS();
4aea24b2
BF		 3106 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3107 - (char *)resp->xdr.buf->head[0].iov_base;
bb6e8a9f 3108 tailbase = p;
1da177e4
LT		 3109
3110 maxcount = PAGE_SIZE;
3111 if (maxcount > readdir->rd_maxcount)
3112 maxcount = readdir->rd_maxcount;
3113
3114 /*
3115 * Convert from bytes to words, account for the two words already
3116 * written, make sure to leave two words at the end for the next
3117 * pointer and eof field.
3118 */
3119 maxcount = (maxcount >> 2) - 4;
3120 if (maxcount < 0) {
3121 nfserr = nfserr_toosmall;
3122 goto err_no_verf;
3123 }
3124
afc59400 3125 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3126 readdir->common.err = 0;
3127 readdir->buflen = maxcount;
3128 readdir->buffer = page;
3129 readdir->offset = NULL;
3130
3131 offset = readdir->rd_cookie;
3132 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3133 &offset,
3134 &readdir->common, nfsd4_encode_dirent);
3135 if (nfserr == nfs_ok &&
3136 readdir->common.err == nfserr_toosmall &&
3137 readdir->buffer == page)
3138 nfserr = nfserr_toosmall;
1da177e4
LT		 3139 if (nfserr)
3140 goto err_no_verf;
3141
3142 if (readdir->offset)
3143 xdr_encode_hyper(readdir->offset, offset);
3144
3145 p = readdir->buffer;
3146 *p++ = 0; /* no more entries */
3147 *p++ = htonl(readdir->common.err == nfserr_eof);
4aea24b2 3148 resp->xdr.buf->page_len = ((char *)p) -
afc59400 3149 (char*)page_address(*(resp->rqstp->rq_next_page-1));
1da177e4 3150
bb6e8a9f 3151 /* Use rest of head for padding and remaining ops: */
4aea24b2
BF		 3152 resp->xdr.buf->tail[0].iov_base = tailbase;
3153 resp->xdr.buf->tail[0].iov_len = 0;
3154 resp->xdr.p = resp->xdr.buf->tail[0].iov_base;
3155 resp->xdr.end = resp->xdr.p +
3156 (PAGE_SIZE - resp->xdr.buf->head[0].iov_len)/4;
1da177e4
LT		 3157
3158 return 0;
3159err_no_verf:
3160 p = savep;
3161 ADJUST_ARGS();
3162 return nfserr;
3163}
3164
695e12f8 3165static __be32
b37ad28b 3166nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3167{
bc749ca4 3168 __be32 *p;
1da177e4
LT		 3169
3170 if (!nfserr) {
3171 RESERVE_SPACE(20);
c654b8a9 3172 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3173 ADJUST_ARGS();
3174 }
695e12f8 3175 return nfserr;
1da177e4
LT		 3176}
3177
695e12f8 3178static __be32
b37ad28b 3179nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3180{
bc749ca4 3181 __be32 *p;
1da177e4
LT		 3182
3183 if (!nfserr) {
3184 RESERVE_SPACE(40);
c654b8a9
BF		 3185 write_cinfo(&p, &rename->rn_sinfo);
3186 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3187 ADJUST_ARGS();
3188 }
695e12f8 3189 return nfserr;
1da177e4
LT		 3190}
3191
695e12f8 3192static __be32
22b6dee8 3193nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
a77c806f 3194 __be32 nfserr, struct svc_export *exp)
dcb488a3 3195{
676e4ebd 3196 u32 i, nflavs, supported;
4796f457
BF		 3197 struct exp_flavor_info *flavs;
3198 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3199 __be32 *p, *flavorsp;
3200 static bool report = true;
dcb488a3
AA		 3201
3202 if (nfserr)
3203 goto out;
4796f457
BF		 3204 if (exp->ex_nflavors) {
3205 flavs = exp->ex_flavors;
3206 nflavs = exp->ex_nflavors;
3207 } else { /* Handling of some defaults in absence of real secinfo: */
3208 flavs = def_flavs;
3209 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3210 nflavs = 2;
3211 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3212 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3213 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3214 nflavs = 1;
3215 flavs[0].pseudoflavor
3216 = svcauth_gss_flavor(exp->ex_client);
3217 } else {
3218 nflavs = 1;
3219 flavs[0].pseudoflavor
3220 = exp->ex_client->flavour->flavour;
3221 }
3222 }
3223
676e4ebd 3224 supported = 0;
dcb488a3 3225 RESERVE_SPACE(4);
676e4ebd 3226 flavorsp = p++; /* to be backfilled later */
dcb488a3 3227 ADJUST_ARGS();
676e4ebd 3228
4796f457 3229 for (i = 0; i < nflavs; i++) {
676e4ebd 3230 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3231 struct rpcsec_gss_info info;
dcb488a3 3232
676e4ebd
CL		 3233 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3234 supported++;
a9f7b4a0 3235 RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
dcb488a3 3236 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3237 WRITE32(info.oid.len);
3238 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3239 WRITE32(info.qop);
a77c806f 3240 WRITE32(info.service);
dcb488a3 3241 ADJUST_ARGS();
676e4ebd
CL		 3242 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3243 supported++;
dcb488a3 3244 RESERVE_SPACE(4);
676e4ebd 3245 WRITE32(pf);
dcb488a3 3246 ADJUST_ARGS();
676e4ebd
CL		 3247 } else {
3248 if (report)
3249 pr_warn("NFS: SECINFO: security flavor %u "
3250 "is not supported\n", pf);
dcb488a3
AA		 3251 }
3252 }
a77c806f 3253
676e4ebd
CL		 3254 if (nflavs != supported)
3255 report = false;
3256 *flavorsp = htonl(supported);
3257
dcb488a3
AA		 3258out:
3259 if (exp)
3260 exp_put(exp);
695e12f8 3261 return nfserr;
dcb488a3
AA		 3262}
3263
22b6dee8
MJ		 3264static __be32
3265nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3266 struct nfsd4_secinfo *secinfo)
3267{
3268 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3269}
3270
3271static __be32
3272nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3273 struct nfsd4_secinfo_no_name *secinfo)
3274{
3275 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3276}
3277
1da177e4
LT		 3278/*
3279 * The SETATTR encode routine is special -- it always encodes a bitmap,
3280 * regardless of the error status.
3281 */
695e12f8 3282static __be32
b37ad28b 3283nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3284{
bc749ca4 3285 __be32 *p;
1da177e4 3286
18032ca0 3287 RESERVE_SPACE(16);
1da177e4 3288 if (nfserr) {
18032ca0
DQ		 3289 WRITE32(3);
3290 WRITE32(0);
1da177e4
LT		 3291 WRITE32(0);
3292 WRITE32(0);
3293 }
3294 else {
18032ca0 3295 WRITE32(3);
1da177e4
LT		 3296 WRITE32(setattr->sa_bmval[0]);
3297 WRITE32(setattr->sa_bmval[1]);
18032ca0 3298 WRITE32(setattr->sa_bmval[2]);
1da177e4
LT		 3299 }
3300 ADJUST_ARGS();
695e12f8 3301 return nfserr;
1da177e4
LT		 3302}
3303
695e12f8 3304static __be32
b37ad28b 3305nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3306{
bc749ca4 3307 __be32 *p;
1da177e4
LT		 3308
3309 if (!nfserr) {
ab4684d1 3310 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3311 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3312 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3313 ADJUST_ARGS();
3314 }
3315 else if (nfserr == nfserr_clid_inuse) {
3316 RESERVE_SPACE(8);
3317 WRITE32(0);
3318 WRITE32(0);
3319 ADJUST_ARGS();
3320 }
695e12f8 3321 return nfserr;
1da177e4
LT		 3322}
3323
695e12f8 3324static __be32
b37ad28b 3325nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3326{
bc749ca4 3327 __be32 *p;
1da177e4
LT		 3328
3329 if (!nfserr) {
3330 RESERVE_SPACE(16);
3331 WRITE32(write->wr_bytes_written);
3332 WRITE32(write->wr_how_written);
ab4684d1 3333 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3334 ADJUST_ARGS();
3335 }
695e12f8 3336 return nfserr;
1da177e4
LT		 3337}
3338
57266a6e
BF		 3339static const u32 nfs4_minimal_spo_must_enforce[2] = {
3340 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3341 1 << (OP_EXCHANGE_ID - 32) |
3342 1 << (OP_CREATE_SESSION - 32) |
3343 1 << (OP_DESTROY_SESSION - 32) |
3344 1 << (OP_DESTROY_CLIENTID - 32)
3345};
3346
2db134eb 3347static __be32
57b7b43b 3348nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3349 struct nfsd4_exchange_id *exid)
3350{
bc749ca4 3351 __be32 *p;
0733d213
AA		 3352 char *major_id;
3353 char *server_scope;
3354 int major_id_sz;
3355 int server_scope_sz;
3356 uint64_t minor_id = 0;
3357
3358 if (nfserr)
3359 return nfserr;
3360
3361 major_id = utsname()->nodename;
3362 major_id_sz = strlen(major_id);
3363 server_scope = utsname()->nodename;
3364 server_scope_sz = strlen(server_scope);
3365
3366 RESERVE_SPACE(
3367 8 /* eir_clientid */ +
3368 4 /* eir_sequenceid */ +
3369 4 /* eir_flags */ +
a8bb84bc 3370 4 /* spr_how */);
0733d213
AA		 3371
3372 WRITEMEM(&exid->clientid, 8);
3373 WRITE32(exid->seqid);
3374 WRITE32(exid->flags);
3375
0733d213 3376 WRITE32(exid->spa_how);
a8bb84bc
KM		 3377 ADJUST_ARGS();
3378
57266a6e
BF		 3379 switch (exid->spa_how) {
3380 case SP4_NONE:
3381 break;
3382 case SP4_MACH_CRED:
a8bb84bc
KM		 3383 /* spo_must_enforce, spo_must_allow */
3384 RESERVE_SPACE(16);
3385
57266a6e
BF		 3386 /* spo_must_enforce bitmap: */
3387 WRITE32(2);
3388 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3389 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3390 /* empty spo_must_allow bitmap: */
3391 WRITE32(0);
a8bb84bc
KM		 3392
3393 ADJUST_ARGS();
57266a6e
BF		 3394 break;
3395 default:
3396 WARN_ON_ONCE(1);
3397 }
0733d213 3398
a8bb84bc
KM		 3399 RESERVE_SPACE(
3400 8 /* so_minor_id */ +
3401 4 /* so_major_id.len */ +
3402 (XDR_QUADLEN(major_id_sz) * 4) +
3403 4 /* eir_server_scope.len */ +
3404 (XDR_QUADLEN(server_scope_sz) * 4) +
3405 4 /* eir_server_impl_id.count (0) */);
3406
0733d213
AA		 3407 /* The server_owner struct */
3408 WRITE64(minor_id); /* Minor id */
3409 /* major id */
3410 WRITE32(major_id_sz);
3411 WRITEMEM(major_id, major_id_sz);
3412
3413 /* Server scope */
3414 WRITE32(server_scope_sz);
3415 WRITEMEM(server_scope, server_scope_sz);
3416
3417 /* Implementation id */
3418 WRITE32(0); /* zero length nfs_impl_id4 array */
3419 ADJUST_ARGS();
3420 return 0;
2db134eb
AA		 3421}
3422
3423static __be32
57b7b43b 3424nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3425 struct nfsd4_create_session *sess)
3426{
bc749ca4 3427 __be32 *p;
ec6b5d7b
AA		 3428
3429 if (nfserr)
3430 return nfserr;
3431
3432 RESERVE_SPACE(24);
3433 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3434 WRITE32(sess->seqid);
3435 WRITE32(sess->flags);
3436 ADJUST_ARGS();
3437
3438 RESERVE_SPACE(28);
3439 WRITE32(0); /* headerpadsz */
3440 WRITE32(sess->fore_channel.maxreq_sz);
3441 WRITE32(sess->fore_channel.maxresp_sz);
3442 WRITE32(sess->fore_channel.maxresp_cached);
3443 WRITE32(sess->fore_channel.maxops);
3444 WRITE32(sess->fore_channel.maxreqs);
3445 WRITE32(sess->fore_channel.nr_rdma_attrs);
3446 ADJUST_ARGS();
3447
3448 if (sess->fore_channel.nr_rdma_attrs) {
3449 RESERVE_SPACE(4);
3450 WRITE32(sess->fore_channel.rdma_attrs);
3451 ADJUST_ARGS();
3452 }
3453
3454 RESERVE_SPACE(28);
3455 WRITE32(0); /* headerpadsz */
3456 WRITE32(sess->back_channel.maxreq_sz);
3457 WRITE32(sess->back_channel.maxresp_sz);
3458 WRITE32(sess->back_channel.maxresp_cached);
3459 WRITE32(sess->back_channel.maxops);
3460 WRITE32(sess->back_channel.maxreqs);
3461 WRITE32(sess->back_channel.nr_rdma_attrs);
3462 ADJUST_ARGS();
3463
3464 if (sess->back_channel.nr_rdma_attrs) {
3465 RESERVE_SPACE(4);
3466 WRITE32(sess->back_channel.rdma_attrs);
3467 ADJUST_ARGS();
3468 }
3469 return 0;
2db134eb
AA		 3470}
3471
c47d832b 3472static __be32
57b7b43b 3473nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3474 struct nfsd4_sequence *seq)
3475{
bc749ca4 3476 __be32 *p;
b85d4c01
BH		 3477
3478 if (nfserr)
3479 return nfserr;
3480
3481 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3482 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3483 WRITE32(seq->seqid);
3484 WRITE32(seq->slotid);
b7d7ca35
BF		 3485 /* Note slotid's are numbered from zero: */
3486 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3487 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3488 WRITE32(seq->status_flags);
b85d4c01
BH		 3489
3490 ADJUST_ARGS();
557ce264 3491 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3492 return 0;
2db134eb
AA		 3493}
3494
2355c596 3495static __be32
57b7b43b 3496nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3497 struct nfsd4_test_stateid *test_stateid)
3498{
03cfb420 3499 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3500 __be32 *p;
17456804 3501
a11fcce1
BF		 3502 if (nfserr)
3503 return nfserr;
3504
03cfb420 3505 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3506 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3507
03cfb420 3508 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3509 *p++ = stateid->ts_id_status;
17456804 3510 }
17456804 3511
03cfb420 3512 ADJUST_ARGS();
17456804
BS		 3513 return nfserr;
3514}
3515
695e12f8
BH		 3516static __be32
3517nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3518{
3519 return nfserr;
3520}
3521
3522typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3523
2db134eb
AA		 3524/*
3525 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3526 * since we don't need to filter out obsolete ops as this is
3527 * done in the decoding phase.
3528 */
695e12f8 3529static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3530 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3531 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3532 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3533 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3534 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3535 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3536 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3537 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3538 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3539 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3540 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3541 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3542 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3543 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3544 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3545 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3546 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3547 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3548 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3549 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3550 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3551 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3552 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3553 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3554 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3555 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3556 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3557 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3558 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3559 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3560 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3561 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3562 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3563 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3564 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3565 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3566 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3567
3568 /* NFSv4.1 operations */
3569 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3570 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3571 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3572 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3573 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3574 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3575 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3576 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3577 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3578 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3579 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3580 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3581 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3582 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3583 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3584 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3585 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3586 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3587 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3588};
3589
496c262c
AA		 3590/*
3591 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3592 * after encoding the current operation with pad.
496c262c 3593 *
58e7b33a
MJ		 3594 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3595 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3596 *
58e7b33a 3597 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3598 *
3599 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3600 * will be at least a page and will therefore hold the xdr_buf head.
3601 */
57b7b43b 3602__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3603{
496c262c 3604 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3605 struct nfsd4_session *session = NULL;
3606 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3607 u32 length, tlen = 0;
496c262c
AA		 3608
3609 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3610 return 0;
496c262c
AA		 3611
3612 session = resp->cstate.session;
496c262c
AA		 3613
3614 if (xb->page_len == 0) {
4aea24b2 3615 length = (char *)resp->xdr.p - (char *)xb->head[0].iov_base + pad;
496c262c
AA		 3616 } else {
3617 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
4aea24b2 3618 tlen = (char *)resp->xdr.p - (char *)xb->tail[0].iov_base;
496c262c
AA		 3619
3620 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3621 }
3622 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3623 length, xb->page_len, tlen, pad);
3624
58e7b33a
MJ		 3625 if (length > session->se_fchannel.maxresp_sz)
3626 return nfserr_rep_too_big;
3627
73e79482 3628 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3629 length > session->se_fchannel.maxresp_cached)
496c262c 3630 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3631
3632 return 0;
496c262c
AA		 3633}
3634
1da177e4
LT		 3635void
3636nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3637{
9411b1d4 3638 struct nfs4_stateowner *so = resp->cstate.replay_owner;
2ebbc012 3639 __be32 *statp;
bc749ca4 3640 __be32 *p;
1da177e4
LT		 3641
3642 RESERVE_SPACE(8);
3643 WRITE32(op->opnum);
3644 statp = p++; /* to be backfilled at the end */
3645 ADJUST_ARGS();
3646
695e12f8
BH		 3647 if (op->opnum == OP_ILLEGAL)
3648 goto status;
3649 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3650 !nfsd4_enc_ops[op->opnum]);
3651 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
067e1ace 3652 /* nfsd4_check_resp_size guarantees enough room for error status */
58e7b33a
MJ		 3653 if (!op->status)
3654 op->status = nfsd4_check_resp_size(resp, 0);
9411b1d4
BF		 3655 if (so) {
3656 so->so_replay.rp_status = op->status;
4aea24b2
BF		 3657 so->so_replay.rp_buflen = (char *)resp->xdr.p
3658 - (char *)(statp+1);
9411b1d4
BF		 3659 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3660 }
695e12f8 3661status:
1da177e4
LT		 3662 /*
3663 * Note: We write the status directly, instead of using WRITE32(),
3664 * since it is already in network byte order.
3665 */
3666 *statp = op->status;
3667}
3668
3669/*
3670 * Encode the reply stored in the stateowner reply cache
3671 *
3672 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3673 * previously sent already encoded operation.
3674 *
3675 * called with nfs4_lock_state() held
3676 */
3677void
3678nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3679{
bc749ca4 3680 __be32 *p;
1da177e4
LT		 3681 struct nfs4_replay *rp = op->replay;
3682
3683 BUG_ON(!rp);
3684
3685 RESERVE_SPACE(8);
3686 WRITE32(op->opnum);
3687 *p++ = rp->rp_status; /* already xdr'ed */
3688 ADJUST_ARGS();
3689
3690 RESERVE_SPACE(rp->rp_buflen);
3691 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3692 ADJUST_ARGS();
3693}
3694
1da177e4 3695int
2ebbc012 3696nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3697{
3698 return xdr_ressize_check(rqstp, p);
3699}
3700
3e98abff 3701int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3702{
3e98abff
BF		 3703 struct svc_rqst *rqstp = rq;
3704 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3705
1da177e4
LT		 3706 if (args->ops != args->iops) {
3707 kfree(args->ops);
3708 args->ops = args->iops;
3709 }
f99d49ad
JJ		 3710 kfree(args->tmpp);
3711 args->tmpp = NULL;
1da177e4
LT		 3712 while (args->to_free) {
3713 struct tmpbuf *tb = args->to_free;
3714 args->to_free = tb->next;
3715 tb->release(tb->buf);
3716 kfree(tb);
3717 }
3e98abff 3718 return 1;
1da177e4
LT		 3719}
3720
3721int
2ebbc012 3722nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3723{
e874f9f8
JL		 3724 if (rqstp->rq_arg.head[0].iov_len % 4) {
3725 /* client is nuts */
3726 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3727 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3728 return 0;
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];
4aea24b2 3760 iov->iov_len = ((char *)resp->xdr.p) - (char *)iov->iov_base;
1da177e4 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 */
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