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vfs: nfsctl.c un-used nfsd #includes
[GitHub/mt8127/android_kernel_alcatel_ttab.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
1da177e4 43#include <linux/namei.h>
341eb184 44#include <linux/statfs.h>
0733d213 45#include <linux/utsname.h>
1da177e4
LT		 46#include <linux/nfsd/xdr4.h>
47#include <linux/nfsd_idmap.h>
1da177e4 48#include <linux/nfs4_acl.h>
4796f457 49#include <linux/sunrpc/svcauth_gss.h>
0a3adade 50#include "vfs.h"
1da177e4
LT		 51
52#define NFSDDBG_FACILITY NFSDDBG_XDR
53
42ca0993
BF		 54/*
55 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
56 * directory in order to indicate to the client that a filesystem boundary is present
57 * We use a fixed fsid for a referral
58 */
59#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
60#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
61
b37ad28b
AV		 62static __be32
63check_filename(char *str, int len, __be32 err)
1da177e4
LT		 64{
65 int i;
66
67 if (len == 0)
68 return nfserr_inval;
69 if (isdotent(str, len))
70 return err;
71 for (i = 0; i < len; i++)
72 if (str[i] == '/')
73 return err;
74 return 0;
75}
76
1da177e4 77#define DECODE_HEAD \
2ebbc012 78 __be32 *p; \
b37ad28b 79 __be32 status
1da177e4
LT		 80#define DECODE_TAIL \
81 status = 0; \
82out: \
83 return status; \
84xdr_error: \
817cb9d4
CL		 85 dprintk("NFSD: xdr error (%s:%d)\n", \
86 __FILE__, __LINE__); \
1da177e4
LT		 87 status = nfserr_bad_xdr; \
88 goto out
89
90#define READ32(x) (x) = ntohl(*p++)
91#define READ64(x) do { \
92 (x) = (u64)ntohl(*p++) << 32; \
93 (x) |= ntohl(*p++); \
94} while (0)
95#define READTIME(x) do { \
96 p++; \
97 (x) = ntohl(*p++); \
98 p++; \
99} while (0)
100#define READMEM(x,nbytes) do { \
101 x = (char *)p; \
102 p += XDR_QUADLEN(nbytes); \
103} while (0)
104#define SAVEMEM(x,nbytes) do { \
105 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
106 savemem(argp, p, nbytes) : \
107 (char *)p)) { \
817cb9d4
CL		 108 dprintk("NFSD: xdr error (%s:%d)\n", \
109 __FILE__, __LINE__); \
1da177e4
LT		 110 goto xdr_error; \
111 } \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114#define COPYMEM(x,nbytes) do { \
115 memcpy((x), p, nbytes); \
116 p += XDR_QUADLEN(nbytes); \
117} while (0)
118
119/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
120#define READ_BUF(nbytes) do { \
121 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
122 p = argp->p; \
123 argp->p += XDR_QUADLEN(nbytes); \
124 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 125 dprintk("NFSD: xdr error (%s:%d)\n", \
126 __FILE__, __LINE__); \
1da177e4
LT		 127 goto xdr_error; \
128 } \
129} while (0)
130
ca2a05aa 131static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 132{
133 /* We want more bytes than seem to be available.
134 * Maybe we need a new page, maybe we have just run out
135 */
ca2a05aa 136 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 137 __be32 *p;
1da177e4
LT		 138 if (avail + argp->pagelen < nbytes)
139 return NULL;
140 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
141 return NULL;
142 /* ok, we can do it with the current plus the next page */
143 if (nbytes <= sizeof(argp->tmp))
144 p = argp->tmp;
145 else {
f99d49ad 146 kfree(argp->tmpp);
1da177e4
LT		 147 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
148 if (!p)
149 return NULL;
150
151 }
ca2a05aa
BF		 152 /*
153 * The following memcpy is safe because read_buf is always
154 * called with nbytes > avail, and the two cases above both
155 * guarantee p points to at least nbytes bytes.
156 */
1da177e4
LT		 157 memcpy(p, argp->p, avail);
158 /* step to next page */
159 argp->p = page_address(argp->pagelist[0]);
160 argp->pagelist++;
161 if (argp->pagelen < PAGE_SIZE) {
162 argp->end = p + (argp->pagelen>>2);
163 argp->pagelen = 0;
164 } else {
165 argp->end = p + (PAGE_SIZE>>2);
166 argp->pagelen -= PAGE_SIZE;
167 }
168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
169 argp->p += XDR_QUADLEN(nbytes - avail);
170 return p;
171}
172
60adfc50
AA		 173static int zero_clientid(clientid_t *clid)
174{
175 return (clid->cl_boot == 0) && (clid->cl_id == 0);
176}
177
1da177e4
LT		 178static int
179defer_free(struct nfsd4_compoundargs *argp,
180 void (*release)(const void *), void *p)
181{
182 struct tmpbuf *tb;
183
184 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
185 if (!tb)
186 return -ENOMEM;
187 tb->buf = p;
188 tb->release = release;
189 tb->next = argp->to_free;
190 argp->to_free = tb;
191 return 0;
192}
193
2ebbc012 194static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 195{
1da177e4 196 if (p == argp->tmp) {
a4db5fe5
BF		 197 p = kmalloc(nbytes, GFP_KERNEL);
198 if (!p)
199 return NULL;
1da177e4
LT		 200 memcpy(p, argp->tmp, nbytes);
201 } else {
73dff8be 202 BUG_ON(p != argp->tmpp);
1da177e4
LT		 203 argp->tmpp = NULL;
204 }
205 if (defer_free(argp, kfree, p)) {
a4db5fe5 206 kfree(p);
1da177e4
LT		 207 return NULL;
208 } else
209 return (char *)p;
210}
211
b37ad28b 212static __be32
1da177e4
LT		 213nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
214{
215 u32 bmlen;
216 DECODE_HEAD;
217
218 bmval[0] = 0;
219 bmval[1] = 0;
7e705706 220 bmval[2] = 0;
1da177e4
LT		 221
222 READ_BUF(4);
223 READ32(bmlen);
224 if (bmlen > 1000)
225 goto xdr_error;
226
227 READ_BUF(bmlen << 2);
228 if (bmlen > 0)
229 READ32(bmval[0]);
230 if (bmlen > 1)
231 READ32(bmval[1]);
7e705706
AA		 232 if (bmlen > 2)
233 READ32(bmval[2]);
1da177e4
LT		 234
235 DECODE_TAIL;
236}
237
b37ad28b 238static __be32
3c8e0316 239nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 240 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 241{
242 int expected_len, len = 0;
243 u32 dummy32;
244 char *buf;
b8dd7b9a 245 int host_err;
1da177e4
LT		 246
247 DECODE_HEAD;
248 iattr->ia_valid = 0;
249 if ((status = nfsd4_decode_bitmap(argp, bmval)))
250 return status;
251
1da177e4
LT		 252 READ_BUF(4);
253 READ32(expected_len);
254
255 if (bmval[0] & FATTR4_WORD0_SIZE) {
256 READ_BUF(8);
257 len += 8;
258 READ64(iattr->ia_size);
259 iattr->ia_valid |= ATTR_SIZE;
260 }
261 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 262 int nace;
263 struct nfs4_ace *ace;
1da177e4
LT		 264
265 READ_BUF(4); len += 4;
266 READ32(nace);
267
28e05dd8
BF		 268 if (nace > NFS4_ACL_MAX)
269 return nfserr_resource;
270
271 *acl = nfs4_acl_new(nace);
1da177e4 272 if (*acl == NULL) {
b8dd7b9a 273 host_err = -ENOMEM;
1da177e4
LT		 274 goto out_nfserr;
275 }
28e05dd8 276 defer_free(argp, kfree, *acl);
1da177e4 277
28e05dd8
BF		 278 (*acl)->naces = nace;
279 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 280 READ_BUF(16); len += 16;
28e05dd8
BF		 281 READ32(ace->type);
282 READ32(ace->flag);
283 READ32(ace->access_mask);
1da177e4
LT		 284 READ32(dummy32);
285 READ_BUF(dummy32);
286 len += XDR_QUADLEN(dummy32) << 2;
287 READMEM(buf, dummy32);
28e05dd8 288 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 289 host_err = 0;
28e05dd8
BF		 290 if (ace->whotype != NFS4_ACL_WHO_NAMED)
291 ace->who = 0;
292 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 293 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 294 buf, dummy32, &ace->who);
1da177e4 295 else
b8dd7b9a 296 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 297 buf, dummy32, &ace->who);
b8dd7b9a 298 if (host_err)
1da177e4 299 goto out_nfserr;
1da177e4
LT		 300 }
301 } else
302 *acl = NULL;
303 if (bmval[1] & FATTR4_WORD1_MODE) {
304 READ_BUF(4);
305 len += 4;
306 READ32(iattr->ia_mode);
307 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
308 iattr->ia_valid |= ATTR_MODE;
309 }
310 if (bmval[1] & FATTR4_WORD1_OWNER) {
311 READ_BUF(4);
312 len += 4;
313 READ32(dummy32);
314 READ_BUF(dummy32);
315 len += (XDR_QUADLEN(dummy32) << 2);
316 READMEM(buf, dummy32);
b8dd7b9a 317 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 318 goto out_nfserr;
319 iattr->ia_valid |= ATTR_UID;
320 }
321 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
322 READ_BUF(4);
323 len += 4;
324 READ32(dummy32);
325 READ_BUF(dummy32);
326 len += (XDR_QUADLEN(dummy32) << 2);
327 READMEM(buf, dummy32);
b8dd7b9a 328 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 329 goto out_nfserr;
330 iattr->ia_valid |= ATTR_GID;
331 }
332 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
333 READ_BUF(4);
334 len += 4;
335 READ32(dummy32);
336 switch (dummy32) {
337 case NFS4_SET_TO_CLIENT_TIME:
338 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
339 all 32 bits of 'nseconds'. */
340 READ_BUF(12);
341 len += 12;
342 READ32(dummy32);
343 if (dummy32)
344 return nfserr_inval;
345 READ32(iattr->ia_atime.tv_sec);
346 READ32(iattr->ia_atime.tv_nsec);
347 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
348 return nfserr_inval;
349 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
350 break;
351 case NFS4_SET_TO_SERVER_TIME:
352 iattr->ia_valid |= ATTR_ATIME;
353 break;
354 default:
355 goto xdr_error;
356 }
357 }
1da177e4
LT		 358 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
359 READ_BUF(4);
360 len += 4;
361 READ32(dummy32);
362 switch (dummy32) {
363 case NFS4_SET_TO_CLIENT_TIME:
364 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
365 all 32 bits of 'nseconds'. */
366 READ_BUF(12);
367 len += 12;
368 READ32(dummy32);
369 if (dummy32)
370 return nfserr_inval;
371 READ32(iattr->ia_mtime.tv_sec);
372 READ32(iattr->ia_mtime.tv_nsec);
373 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
374 return nfserr_inval;
375 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
376 break;
377 case NFS4_SET_TO_SERVER_TIME:
378 iattr->ia_valid |= ATTR_MTIME;
379 break;
380 default:
381 goto xdr_error;
382 }
383 }
3c8e0316
YZ		 384 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
385 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
386 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
387 READ_BUF(expected_len - len);
388 else if (len != expected_len)
1da177e4
LT		 389 goto xdr_error;
390
391 DECODE_TAIL;
392
393out_nfserr:
b8dd7b9a 394 status = nfserrno(host_err);
1da177e4
LT		 395 goto out;
396}
397
e31a1b66
BH		 398static __be32
399nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
400{
401 DECODE_HEAD;
402
403 READ_BUF(sizeof(stateid_t));
404 READ32(sid->si_generation);
405 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
406
407 DECODE_TAIL;
408}
409
b37ad28b 410static __be32
1da177e4
LT		 411nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
412{
413 DECODE_HEAD;
414
415 READ_BUF(4);
416 READ32(access->ac_req_access);
417
418 DECODE_TAIL;
419}
420
b37ad28b 421static __be32
1da177e4
LT		 422nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
423{
424 DECODE_HEAD;
425
426 close->cl_stateowner = NULL;
e31a1b66 427 READ_BUF(4);
1da177e4 428 READ32(close->cl_seqid);
e31a1b66 429 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 430
431 DECODE_TAIL;
432}
433
434
b37ad28b 435static __be32
1da177e4
LT		 436nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
437{
438 DECODE_HEAD;
439
440 READ_BUF(12);
441 READ64(commit->co_offset);
442 READ32(commit->co_count);
443
444 DECODE_TAIL;
445}
446
b37ad28b 447static __be32
1da177e4
LT		 448nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
449{
450 DECODE_HEAD;
451
452 READ_BUF(4);
453 READ32(create->cr_type);
454 switch (create->cr_type) {
455 case NF4LNK:
456 READ_BUF(4);
457 READ32(create->cr_linklen);
458 READ_BUF(create->cr_linklen);
459 SAVEMEM(create->cr_linkname, create->cr_linklen);
460 break;
461 case NF4BLK:
462 case NF4CHR:
463 READ_BUF(8);
464 READ32(create->cr_specdata1);
465 READ32(create->cr_specdata2);
466 break;
467 case NF4SOCK:
468 case NF4FIFO:
469 case NF4DIR:
470 default:
471 break;
472 }
473
474 READ_BUF(4);
475 READ32(create->cr_namelen);
476 READ_BUF(create->cr_namelen);
477 SAVEMEM(create->cr_name, create->cr_namelen);
478 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
479 return status;
480
3c8e0316
YZ		 481 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
482 &create->cr_acl);
c0d6fc8a 483 if (status)
1da177e4
LT		 484 goto out;
485
486 DECODE_TAIL;
487}
488
b37ad28b 489static inline __be32
1da177e4
LT		 490nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
491{
e31a1b66 492 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 493}
494
b37ad28b 495static inline __be32
1da177e4
LT		 496nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
497{
498 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
499}
500
b37ad28b 501static __be32
1da177e4
LT		 502nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
503{
504 DECODE_HEAD;
505
506 READ_BUF(4);
507 READ32(link->li_namelen);
508 READ_BUF(link->li_namelen);
509 SAVEMEM(link->li_name, link->li_namelen);
510 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
511 return status;
512
513 DECODE_TAIL;
514}
515
b37ad28b 516static __be32
1da177e4
LT		 517nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
518{
519 DECODE_HEAD;
520
3a65588a 521 lock->lk_replay_owner = NULL;
1da177e4
LT		 522 /*
523 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
524 */
525 READ_BUF(28);
526 READ32(lock->lk_type);
527 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
528 goto xdr_error;
529 READ32(lock->lk_reclaim);
530 READ64(lock->lk_offset);
531 READ64(lock->lk_length);
532 READ32(lock->lk_is_new);
533
534 if (lock->lk_is_new) {
e31a1b66 535 READ_BUF(4);
1da177e4 536 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 537 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
538 if (status)
539 return status;
540 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 541 READ32(lock->lk_new_lock_seqid);
542 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
543 READ32(lock->lk_new_owner.len);
544 READ_BUF(lock->lk_new_owner.len);
545 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
546 } else {
e31a1b66
BH		 547 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
548 if (status)
549 return status;
550 READ_BUF(4);
1da177e4
LT		 551 READ32(lock->lk_old_lock_seqid);
552 }
553
554 DECODE_TAIL;
555}
556
b37ad28b 557static __be32
1da177e4
LT		 558nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
559{
560 DECODE_HEAD;
561
562 READ_BUF(32);
563 READ32(lockt->lt_type);
564 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
565 goto xdr_error;
566 READ64(lockt->lt_offset);
567 READ64(lockt->lt_length);
568 COPYMEM(&lockt->lt_clientid, 8);
569 READ32(lockt->lt_owner.len);
570 READ_BUF(lockt->lt_owner.len);
571 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
572
60adfc50
AA		 573 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
574 return nfserr_inval;
1da177e4
LT		 575 DECODE_TAIL;
576}
577
b37ad28b 578static __be32
1da177e4
LT		 579nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
580{
581 DECODE_HEAD;
582
583 locku->lu_stateowner = NULL;
e31a1b66 584 READ_BUF(8);
1da177e4
LT		 585 READ32(locku->lu_type);
586 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
587 goto xdr_error;
588 READ32(locku->lu_seqid);
e31a1b66
BH		 589 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
590 if (status)
591 return status;
592 READ_BUF(16);
1da177e4
LT		 593 READ64(locku->lu_offset);
594 READ64(locku->lu_length);
595
596 DECODE_TAIL;
597}
598
b37ad28b 599static __be32
1da177e4
LT		 600nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
601{
602 DECODE_HEAD;
603
604 READ_BUF(4);
605 READ32(lookup->lo_len);
606 READ_BUF(lookup->lo_len);
607 SAVEMEM(lookup->lo_name, lookup->lo_len);
608 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
609 return status;
610
611 DECODE_TAIL;
612}
613
b37ad28b 614static __be32
1da177e4
LT		 615nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
616{
617 DECODE_HEAD;
618
619 memset(open->op_bmval, 0, sizeof(open->op_bmval));
620 open->op_iattr.ia_valid = 0;
621 open->op_stateowner = NULL;
622
623 /* seqid, share_access, share_deny, clientid, ownerlen */
624 READ_BUF(16 + sizeof(clientid_t));
625 READ32(open->op_seqid);
626 READ32(open->op_share_access);
627 READ32(open->op_share_deny);
628 COPYMEM(&open->op_clientid, sizeof(clientid_t));
629 READ32(open->op_owner.len);
630
631 /* owner, open_flag */
632 READ_BUF(open->op_owner.len + 4);
633 SAVEMEM(open->op_owner.data, open->op_owner.len);
634 READ32(open->op_create);
635 switch (open->op_create) {
636 case NFS4_OPEN_NOCREATE:
637 break;
638 case NFS4_OPEN_CREATE:
639 READ_BUF(4);
640 READ32(open->op_createmode);
641 switch (open->op_createmode) {
642 case NFS4_CREATE_UNCHECKED:
643 case NFS4_CREATE_GUARDED:
c0d6fc8a 644 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 645 &open->op_iattr, &open->op_acl);
c0d6fc8a 646 if (status)
1da177e4
LT		 647 goto out;
648 break;
649 case NFS4_CREATE_EXCLUSIVE:
650 READ_BUF(8);
651 COPYMEM(open->op_verf.data, 8);
652 break;
79fb54ab
BH		 653 case NFS4_CREATE_EXCLUSIVE4_1:
654 if (argp->minorversion < 1)
655 goto xdr_error;
656 READ_BUF(8);
657 COPYMEM(open->op_verf.data, 8);
658 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 659 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 660 if (status)
661 goto out;
662 break;
1da177e4
LT		 663 default:
664 goto xdr_error;
665 }
666 break;
667 default:
668 goto xdr_error;
669 }
670
671 /* open_claim */
672 READ_BUF(4);
673 READ32(open->op_claim_type);
674 switch (open->op_claim_type) {
675 case NFS4_OPEN_CLAIM_NULL:
676 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
677 READ_BUF(4);
678 READ32(open->op_fname.len);
679 READ_BUF(open->op_fname.len);
680 SAVEMEM(open->op_fname.data, open->op_fname.len);
681 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
682 return status;
683 break;
684 case NFS4_OPEN_CLAIM_PREVIOUS:
685 READ_BUF(4);
686 READ32(open->op_delegate_type);
687 break;
688 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 689 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
690 if (status)
691 return status;
692 READ_BUF(4);
1da177e4
LT		 693 READ32(open->op_fname.len);
694 READ_BUF(open->op_fname.len);
695 SAVEMEM(open->op_fname.data, open->op_fname.len);
696 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
697 return status;
698 break;
699 default:
700 goto xdr_error;
701 }
702
703 DECODE_TAIL;
704}
705
b37ad28b 706static __be32
1da177e4
LT		 707nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
708{
709 DECODE_HEAD;
710
711 open_conf->oc_stateowner = NULL;
e31a1b66
BH		 712 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
713 if (status)
714 return status;
715 READ_BUF(4);
1da177e4
LT		 716 READ32(open_conf->oc_seqid);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
723{
724 DECODE_HEAD;
725
726 open_down->od_stateowner = NULL;
e31a1b66
BH		 727 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
728 if (status)
729 return status;
730 READ_BUF(12);
1da177e4
LT		 731 READ32(open_down->od_seqid);
732 READ32(open_down->od_share_access);
733 READ32(open_down->od_share_deny);
734
735 DECODE_TAIL;
736}
737
b37ad28b 738static __be32
1da177e4
LT		 739nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
740{
741 DECODE_HEAD;
742
743 READ_BUF(4);
744 READ32(putfh->pf_fhlen);
745 if (putfh->pf_fhlen > NFS4_FHSIZE)
746 goto xdr_error;
747 READ_BUF(putfh->pf_fhlen);
748 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
749
750 DECODE_TAIL;
751}
752
b37ad28b 753static __be32
1da177e4
LT		 754nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
755{
756 DECODE_HEAD;
757
e31a1b66
BH		 758 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
1da177e4
LT		 762 READ64(read->rd_offset);
763 READ32(read->rd_length);
764
765 DECODE_TAIL;
766}
767
b37ad28b 768static __be32
1da177e4
LT		 769nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
770{
771 DECODE_HEAD;
772
773 READ_BUF(24);
774 READ64(readdir->rd_cookie);
775 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
776 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
777 READ32(readdir->rd_maxcount);
778 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
779 goto out;
780
781 DECODE_TAIL;
782}
783
b37ad28b 784static __be32
1da177e4
LT		 785nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
786{
787 DECODE_HEAD;
788
789 READ_BUF(4);
790 READ32(remove->rm_namelen);
791 READ_BUF(remove->rm_namelen);
792 SAVEMEM(remove->rm_name, remove->rm_namelen);
793 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
794 return status;
795
796 DECODE_TAIL;
797}
798
b37ad28b 799static __be32
1da177e4
LT		 800nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
801{
802 DECODE_HEAD;
803
804 READ_BUF(4);
805 READ32(rename->rn_snamelen);
806 READ_BUF(rename->rn_snamelen + 4);
807 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
808 READ32(rename->rn_tnamelen);
809 READ_BUF(rename->rn_tnamelen);
810 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
811 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
812 return status;
813 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
814 return status;
815
816 DECODE_TAIL;
817}
818
b37ad28b 819static __be32
1da177e4
LT		 820nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
821{
822 DECODE_HEAD;
823
824 READ_BUF(sizeof(clientid_t));
825 COPYMEM(clientid, sizeof(clientid_t));
826
827 DECODE_TAIL;
828}
829
dcb488a3
AA		 830static __be32
831nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
832 struct nfsd4_secinfo *secinfo)
833{
834 DECODE_HEAD;
835
836 READ_BUF(4);
837 READ32(secinfo->si_namelen);
838 READ_BUF(secinfo->si_namelen);
839 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
840 status = check_filename(secinfo->si_name, secinfo->si_namelen,
841 nfserr_noent);
842 if (status)
843 return status;
844 DECODE_TAIL;
845}
846
b37ad28b 847static __be32
1da177e4
LT		 848nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
849{
e31a1b66 850 __be32 status;
1da177e4 851
e31a1b66
BH		 852 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
853 if (status)
854 return status;
3c8e0316
YZ		 855 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
856 &setattr->sa_acl);
1da177e4
LT		 857}
858
b37ad28b 859static __be32
1da177e4
LT		 860nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
861{
862 DECODE_HEAD;
863
864 READ_BUF(12);
865 COPYMEM(setclientid->se_verf.data, 8);
866 READ32(setclientid->se_namelen);
867
868 READ_BUF(setclientid->se_namelen + 8);
869 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
870 READ32(setclientid->se_callback_prog);
871 READ32(setclientid->se_callback_netid_len);
872
873 READ_BUF(setclientid->se_callback_netid_len + 4);
874 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
875 READ32(setclientid->se_callback_addr_len);
876
877 READ_BUF(setclientid->se_callback_addr_len + 4);
878 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
879 READ32(setclientid->se_callback_ident);
880
881 DECODE_TAIL;
882}
883
b37ad28b 884static __be32
1da177e4
LT		 885nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
886{
887 DECODE_HEAD;
888
889 READ_BUF(8 + sizeof(nfs4_verifier));
890 COPYMEM(&scd_c->sc_clientid, 8);
891 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
892
893 DECODE_TAIL;
894}
895
896/* Also used for NVERIFY */
b37ad28b 897static __be32
1da177e4
LT		 898nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
899{
900#if 0
901 struct nfsd4_compoundargs save = {
902 .p = argp->p,
903 .end = argp->end,
904 .rqstp = argp->rqstp,
905 };
906 u32 ve_bmval[2];
907 struct iattr ve_iattr; /* request */
908 struct nfs4_acl *ve_acl; /* request */
909#endif
910 DECODE_HEAD;
911
912 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
913 goto out;
914
915 /* For convenience's sake, we compare raw xdr'd attributes in
916 * nfsd4_proc_verify; however we still decode here just to return
917 * correct error in case of bad xdr. */
918#if 0
919 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
920 if (status == nfserr_inval) {
921 status = nfserrno(status);
922 goto out;
923 }
924#endif
925 READ_BUF(4);
926 READ32(verify->ve_attrlen);
927 READ_BUF(verify->ve_attrlen);
928 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
929
930 DECODE_TAIL;
931}
932
b37ad28b 933static __be32
1da177e4
LT		 934nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
935{
936 int avail;
937 int v;
938 int len;
939 DECODE_HEAD;
940
e31a1b66
BH		 941 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
942 if (status)
943 return status;
944 READ_BUF(16);
1da177e4
LT		 945 READ64(write->wr_offset);
946 READ32(write->wr_stable_how);
947 if (write->wr_stable_how > 2)
948 goto xdr_error;
949 READ32(write->wr_buflen);
950
951 /* Sorry .. no magic macros for this.. *
952 * READ_BUF(write->wr_buflen);
953 * SAVEMEM(write->wr_buf, write->wr_buflen);
954 */
955 avail = (char*)argp->end - (char*)argp->p;
956 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 957 dprintk("NFSD: xdr error (%s:%d)\n",
958 __FILE__, __LINE__);
1da177e4
LT		 959 goto xdr_error;
960 }
3cc03b16
N		 961 argp->rqstp->rq_vec[0].iov_base = p;
962 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 963 v = 0;
964 len = write->wr_buflen;
3cc03b16
N		 965 while (len > argp->rqstp->rq_vec[v].iov_len) {
966 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 967 v++;
3cc03b16 968 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 969 argp->pagelist++;
970 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 971 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 972 argp->pagelen -= PAGE_SIZE;
973 } else {
3cc03b16 974 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 975 argp->pagelen -= len;
976 }
977 }
2ebbc012
AV		 978 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
979 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 980 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 981 write->wr_vlen = v+1;
982
983 DECODE_TAIL;
984}
985
b37ad28b 986static __be32
1da177e4
LT		 987nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
988{
989 DECODE_HEAD;
990
991 READ_BUF(12);
992 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
993 READ32(rlockowner->rl_owner.len);
994 READ_BUF(rlockowner->rl_owner.len);
995 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
996
60adfc50
AA		 997 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
998 return nfserr_inval;
1da177e4
LT		 999 DECODE_TAIL;
1000}
1001
2db134eb
AA		 1002static __be32
1003nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1004 struct nfsd4_exchange_id *exid)
2db134eb 1005{
0733d213
AA		 1006 int dummy;
1007 DECODE_HEAD;
1008
1009 READ_BUF(NFS4_VERIFIER_SIZE);
1010 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1011
1012 READ_BUF(4);
1013 READ32(exid->clname.len);
1014
1015 READ_BUF(exid->clname.len);
1016 SAVEMEM(exid->clname.data, exid->clname.len);
1017
1018 READ_BUF(4);
1019 READ32(exid->flags);
1020
1021 /* Ignore state_protect4_a */
1022 READ_BUF(4);
1023 READ32(exid->spa_how);
1024 switch (exid->spa_how) {
1025 case SP4_NONE:
1026 break;
1027 case SP4_MACH_CRED:
1028 /* spo_must_enforce */
1029 READ_BUF(4);
1030 READ32(dummy);
1031 READ_BUF(dummy * 4);
1032 p += dummy;
1033
1034 /* spo_must_allow */
1035 READ_BUF(4);
1036 READ32(dummy);
1037 READ_BUF(dummy * 4);
1038 p += dummy;
1039 break;
1040 case SP4_SSV:
1041 /* ssp_ops */
1042 READ_BUF(4);
1043 READ32(dummy);
1044 READ_BUF(dummy * 4);
1045 p += dummy;
1046
1047 READ_BUF(4);
1048 READ32(dummy);
1049 READ_BUF(dummy * 4);
1050 p += dummy;
1051
1052 /* ssp_hash_algs<> */
1053 READ_BUF(4);
1054 READ32(dummy);
1055 READ_BUF(dummy);
1056 p += XDR_QUADLEN(dummy);
1057
1058 /* ssp_encr_algs<> */
1059 READ_BUF(4);
1060 READ32(dummy);
1061 READ_BUF(dummy);
1062 p += XDR_QUADLEN(dummy);
1063
1064 /* ssp_window and ssp_num_gss_handles */
1065 READ_BUF(8);
1066 READ32(dummy);
1067 READ32(dummy);
1068 break;
1069 default:
1070 goto xdr_error;
1071 }
1072
1073 /* Ignore Implementation ID */
1074 READ_BUF(4); /* nfs_impl_id4 array length */
1075 READ32(dummy);
1076
1077 if (dummy > 1)
1078 goto xdr_error;
1079
1080 if (dummy == 1) {
1081 /* nii_domain */
1082 READ_BUF(4);
1083 READ32(dummy);
1084 READ_BUF(dummy);
1085 p += XDR_QUADLEN(dummy);
1086
1087 /* nii_name */
1088 READ_BUF(4);
1089 READ32(dummy);
1090 READ_BUF(dummy);
1091 p += XDR_QUADLEN(dummy);
1092
1093 /* nii_date */
1094 READ_BUF(12);
1095 p += 3;
1096 }
1097 DECODE_TAIL;
2db134eb
AA		 1098}
1099
1100static __be32
1101nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1102 struct nfsd4_create_session *sess)
1103{
ec6b5d7b
AA		 1104 DECODE_HEAD;
1105
1106 u32 dummy;
1107 char *machine_name;
1108 int i;
1109 int nr_secflavs;
1110
1111 READ_BUF(16);
1112 COPYMEM(&sess->clientid, 8);
1113 READ32(sess->seqid);
1114 READ32(sess->flags);
1115
1116 /* Fore channel attrs */
1117 READ_BUF(28);
1118 READ32(dummy); /* headerpadsz is always 0 */
1119 READ32(sess->fore_channel.maxreq_sz);
1120 READ32(sess->fore_channel.maxresp_sz);
1121 READ32(sess->fore_channel.maxresp_cached);
1122 READ32(sess->fore_channel.maxops);
1123 READ32(sess->fore_channel.maxreqs);
1124 READ32(sess->fore_channel.nr_rdma_attrs);
1125 if (sess->fore_channel.nr_rdma_attrs == 1) {
1126 READ_BUF(4);
1127 READ32(sess->fore_channel.rdma_attrs);
1128 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1129 dprintk("Too many fore channel attr bitmaps!\n");
1130 goto xdr_error;
1131 }
1132
1133 /* Back channel attrs */
1134 READ_BUF(28);
1135 READ32(dummy); /* headerpadsz is always 0 */
1136 READ32(sess->back_channel.maxreq_sz);
1137 READ32(sess->back_channel.maxresp_sz);
1138 READ32(sess->back_channel.maxresp_cached);
1139 READ32(sess->back_channel.maxops);
1140 READ32(sess->back_channel.maxreqs);
1141 READ32(sess->back_channel.nr_rdma_attrs);
1142 if (sess->back_channel.nr_rdma_attrs == 1) {
1143 READ_BUF(4);
1144 READ32(sess->back_channel.rdma_attrs);
1145 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1146 dprintk("Too many back channel attr bitmaps!\n");
1147 goto xdr_error;
1148 }
1149
1150 READ_BUF(8);
1151 READ32(sess->callback_prog);
1152
1153 /* callback_sec_params4 */
1154 READ32(nr_secflavs);
1155 for (i = 0; i < nr_secflavs; ++i) {
1156 READ_BUF(4);
1157 READ32(dummy);
1158 switch (dummy) {
1159 case RPC_AUTH_NULL:
1160 /* Nothing to read */
1161 break;
1162 case RPC_AUTH_UNIX:
1163 READ_BUF(8);
1164 /* stamp */
1165 READ32(dummy);
1166
1167 /* machine name */
1168 READ32(dummy);
1169 READ_BUF(dummy);
1170 SAVEMEM(machine_name, dummy);
1171
1172 /* uid, gid */
1173 READ_BUF(8);
1174 READ32(sess->uid);
1175 READ32(sess->gid);
1176
1177 /* more gids */
1178 READ_BUF(4);
1179 READ32(dummy);
1180 READ_BUF(dummy * 4);
1181 for (i = 0; i < dummy; ++i)
1182 READ32(dummy);
1183 break;
1184 case RPC_AUTH_GSS:
1185 dprintk("RPC_AUTH_GSS callback secflavor "
1186 "not supported!\n");
1187 READ_BUF(8);
1188 /* gcbp_service */
1189 READ32(dummy);
1190 /* gcbp_handle_from_server */
1191 READ32(dummy);
1192 READ_BUF(dummy);
1193 p += XDR_QUADLEN(dummy);
1194 /* gcbp_handle_from_client */
1195 READ_BUF(4);
1196 READ32(dummy);
1197 READ_BUF(dummy);
1198 p += XDR_QUADLEN(dummy);
1199 break;
1200 default:
1201 dprintk("Illegal callback secflavor\n");
1202 return nfserr_inval;
1203 }
1204 }
1205 DECODE_TAIL;
2db134eb
AA		 1206}
1207
1208static __be32
1209nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1210 struct nfsd4_destroy_session *destroy_session)
1211{
e10e0cfc
BH		 1212 DECODE_HEAD;
1213 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1214 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1215
1216 DECODE_TAIL;
2db134eb
AA		 1217}
1218
1219static __be32
1220nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1221 struct nfsd4_sequence *seq)
1222{
b85d4c01
BH		 1223 DECODE_HEAD;
1224
1225 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1226 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1227 READ32(seq->seqid);
1228 READ32(seq->slotid);
1229 READ32(seq->maxslots);
1230 READ32(seq->cachethis);
1231
1232 DECODE_TAIL;
2db134eb
AA		 1233}
1234
347e0ad9
BH		 1235static __be32
1236nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1237{
1238 return nfs_ok;
1239}
1240
3c375c6f
BH		 1241static __be32
1242nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1243{
1e685ec2 1244 return nfserr_notsupp;
3c375c6f
BH		 1245}
1246
347e0ad9
BH		 1247typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1248
1249static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1250 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1251 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1252 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1253 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1254 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1255 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1256 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1257 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1258 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1259 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1260 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1261 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1262 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1263 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1264 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1265 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1266 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1267 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1268 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1269 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1270 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1271 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1272 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1273 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1274 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1275 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1276 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1277 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1278 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1279 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1280 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1281 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1282 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1283 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1284 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1285 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1286 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1287};
1288
2db134eb 1289static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1290 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1291 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1292 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1293 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1294 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1295 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1296 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1297 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1298 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1299 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1300 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1301 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1302 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1303 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1304 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1305 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1306 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1307 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1308 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1309 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1310 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1311 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1312 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1313 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1314 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1315 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1316 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1317 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1318 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1319 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1320 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1321 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1322 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1323 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1324 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1325 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1326 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1327
1328 /* new operations for NFSv4.1 */
9064caae
RD		 1329 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1330 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1332 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1333 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1334 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1335 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1341 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1343 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1348};
1349
f2feb96b
BH		 1350struct nfsd4_minorversion_ops {
1351 nfsd4_dec *decoders;
1352 int nops;
1353};
1354
1355static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1356 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1357 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1358};
1359
b37ad28b 1360static __be32
1da177e4
LT		 1361nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1362{
1363 DECODE_HEAD;
1364 struct nfsd4_op *op;
f2feb96b 1365 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1366 int i;
1367
1368 /*
1369 * XXX: According to spec, we should check the tag
1370 * for UTF-8 compliance. I'm postponing this for
1371 * now because it seems that some clients do use
1372 * binary tags.
1373 */
1374 READ_BUF(4);
1375 READ32(argp->taglen);
1376 READ_BUF(argp->taglen + 8);
1377 SAVEMEM(argp->tag, argp->taglen);
1378 READ32(argp->minorversion);
1379 READ32(argp->opcnt);
1380
1381 if (argp->taglen > NFSD4_MAX_TAGLEN)
1382 goto xdr_error;
1383 if (argp->opcnt > 100)
1384 goto xdr_error;
1385
e8c96f8c 1386 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1387 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1388 if (!argp->ops) {
1389 argp->ops = argp->iops;
817cb9d4 1390 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1391 goto xdr_error;
1392 }
1393 }
1394
f2feb96b 1395 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1396 argp->opcnt = 0;
1397
f2feb96b 1398 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1399 for (i = 0; i < argp->opcnt; i++) {
1400 op = &argp->ops[i];
1401 op->replay = NULL;
1402
1403 /*
1404 * We can't use READ_BUF() here because we need to handle
1405 * a missing opcode as an OP_WRITE + 1. So we need to check
1406 * to see if we're truly at the end of our buffer or if there
1407 * is another page we need to flip to.
1408 */
1409
1410 if (argp->p == argp->end) {
1411 if (argp->pagelen < 4) {
1412 /* There isn't an opcode still on the wire */
1413 op->opnum = OP_WRITE + 1;
1414 op->status = nfserr_bad_xdr;
1415 argp->opcnt = i+1;
1416 break;
1417 }
1418
1419 /*
1420 * False alarm. We just hit a page boundary, but there
1421 * is still data available. Move pointer across page
1422 * boundary. *snip from READ_BUF*
1423 */
1424 argp->p = page_address(argp->pagelist[0]);
1425 argp->pagelist++;
1426 if (argp->pagelen < PAGE_SIZE) {
1427 argp->end = p + (argp->pagelen>>2);
1428 argp->pagelen = 0;
1429 } else {
1430 argp->end = p + (PAGE_SIZE>>2);
1431 argp->pagelen -= PAGE_SIZE;
1432 }
1433 }
1434 op->opnum = ntohl(*argp->p++);
1435
f2feb96b
BH		 1436 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1437 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1438 else {
1da177e4
LT		 1439 op->opnum = OP_ILLEGAL;
1440 op->status = nfserr_op_illegal;
1da177e4
LT		 1441 }
1442
1443 if (op->status) {
1444 argp->opcnt = i+1;
1445 break;
1446 }
1447 }
1448
1449 DECODE_TAIL;
1450}
1da177e4 1451
1da177e4
LT		 1452#define WRITE32(n) *p++ = htonl(n)
1453#define WRITE64(n) do { \
1454 *p++ = htonl((u32)((n) >> 32)); \
1455 *p++ = htonl((u32)(n)); \
1456} while (0)
5108b276 1457#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1458 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1459 memcpy(p, ptr, nbytes); \
1460 p += XDR_QUADLEN(nbytes); \
5108b276 1461}} while (0)
c654b8a9
BF		 1462
1463static void write32(__be32 **p, u32 n)
1464{
1465 *(*p)++ = n;
1466}
1467
1468static void write64(__be32 **p, u64 n)
1469{
1470 write32(p, (u32)(n >> 32));
1471 write32(p, (u32)n);
1472}
1473
1474static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1475{
1476 if (IS_I_VERSION(inode)) {
1477 write64(p, inode->i_version);
1478 } else {
1479 write32(p, stat->ctime.tv_sec);
1480 write32(p, stat->ctime.tv_nsec);
1481 }
1482}
1483
1484static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1485{
1486 write32(p, c->atomic);
1487 if (c->change_supported) {
1488 write64(p, c->before_change);
1489 write64(p, c->after_change);
1490 } else {
1491 write32(p, c->before_ctime_sec);
1492 write32(p, c->before_ctime_nsec);
1493 write32(p, c->after_ctime_sec);
1494 write32(p, c->after_ctime_nsec);
1495 }
1496}
1da177e4
LT		 1497
1498#define RESERVE_SPACE(nbytes) do { \
1499 p = resp->p; \
1500 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1501} while (0)
1502#define ADJUST_ARGS() resp->p = p
1503
1504/*
1505 * Header routine to setup seqid operation replay cache
1506 */
1507#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1508 __be32 *save; \
1da177e4
LT		 1509 \
1510 save = resp->p;
1511
1512/*
7fb64cee
N		 1513 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1514 * is where sequence id's are incremented, and the replay cache is filled.
1515 * Note that we increment sequence id's here, at the last moment, so we're sure
1516 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1517 */
1518
1519#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1520 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1521 stateowner->so_seqid++; \
1da177e4
LT		 1522 stateowner->so_replay.rp_status = nfserr; \
1523 stateowner->so_replay.rp_buflen = \
1524 (((char *)(resp)->p - (char *)save)); \
1525 memcpy(stateowner->so_replay.rp_buf, save, \
1526 stateowner->so_replay.rp_buflen); \
1527 } } while (0);
1528
81c3f413
BF		 1529/* Encode as an array of strings the string given with components
1530 * seperated @sep.
1531 */
b37ad28b 1532static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1533 __be32 **pp, int *buflen)
81c3f413 1534{
2ebbc012
AV		 1535 __be32 *p = *pp;
1536 __be32 *countp = p;
81c3f413
BF		 1537 int strlen, count=0;
1538 char *str, *end;
1539
1540 dprintk("nfsd4_encode_components(%s)\n", components);
1541 if ((*buflen -= 4) < 0)
1542 return nfserr_resource;
1543 WRITE32(0); /* We will fill this in with @count later */
1544 end = str = components;
1545 while (*end) {
1546 for (; *end && (*end != sep); end++)
1547 ; /* Point to end of component */
1548 strlen = end - str;
1549 if (strlen) {
1550 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1551 return nfserr_resource;
1552 WRITE32(strlen);
1553 WRITEMEM(str, strlen);
1554 count++;
1555 }
1556 else
1557 end++;
1558 str = end;
1559 }
1560 *pp = p;
1561 p = countp;
1562 WRITE32(count);
1563 return 0;
1564}
1565
1566/*
1567 * encode a location element of a fs_locations structure
1568 */
b37ad28b 1569static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1570 __be32 **pp, int *buflen)
81c3f413 1571{
b37ad28b 1572 __be32 status;
2ebbc012 1573 __be32 *p = *pp;
81c3f413
BF		 1574
1575 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1576 if (status)
1577 return status;
1578 status = nfsd4_encode_components('/', location->path, &p, buflen);
1579 if (status)
1580 return status;
1581 *pp = p;
1582 return 0;
1583}
1584
1585/*
1586 * Return the path to an export point in the pseudo filesystem namespace
1587 * Returned string is safe to use as long as the caller holds a reference
1588 * to @exp.
1589 */
b37ad28b 1590static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1591{
1592 struct svc_fh tmp_fh;
2671a4bf
TM		 1593 char *path = NULL, *rootpath;
1594 size_t rootlen;
81c3f413
BF		 1595
1596 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1597 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1598 if (*stat)
1599 return NULL;
54775491 1600 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1601
54775491 1602 path = exp->ex_pathname;
81c3f413 1603
2671a4bf
TM		 1604 rootlen = strlen(rootpath);
1605 if (strncmp(path, rootpath, rootlen)) {
817cb9d4 1606 dprintk("nfsd: fs_locations failed;"
81c3f413 1607 "%s is not contained in %s\n", path, rootpath);
cc45f017 1608 *stat = nfserr_notsupp;
2671a4bf
TM		 1609 path = NULL;
1610 goto out;
81c3f413 1611 }
2671a4bf
TM		 1612 path += rootlen;
1613out:
1614 fh_put(&tmp_fh);
1615 return path;
81c3f413
BF		 1616}
1617
1618/*
1619 * encode a fs_locations structure
1620 */
b37ad28b 1621static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1622 struct svc_export *exp,
2ebbc012 1623 __be32 **pp, int *buflen)
81c3f413 1624{
b37ad28b 1625 __be32 status;
cc45f017 1626 int i;
2ebbc012 1627 __be32 *p = *pp;
81c3f413 1628 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1629 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1630
cc45f017
AV		 1631 if (status)
1632 return status;
81c3f413
BF		 1633 status = nfsd4_encode_components('/', root, &p, buflen);
1634 if (status)
1635 return status;
1636 if ((*buflen -= 4) < 0)
1637 return nfserr_resource;
1638 WRITE32(fslocs->locations_count);
1639 for (i=0; i<fslocs->locations_count; i++) {
1640 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1641 &p, buflen);
1642 if (status)
1643 return status;
1644 }
1645 *pp = p;
1646 return 0;
1647}
1da177e4
LT		 1648
1649static u32 nfs4_ftypes[16] = {
1650 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1651 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1652 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1653 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1654};
1655
b37ad28b 1656static __be32
1da177e4 1657nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1658 __be32 **p, int *buflen)
1da177e4
LT		 1659{
1660 int status;
1661
1662 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1663 return nfserr_resource;
1664 if (whotype != NFS4_ACL_WHO_NAMED)
1665 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1666 else if (group)
1667 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1668 else
1669 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1670 if (status < 0)
1671 return nfserrno(status);
1672 *p = xdr_encode_opaque(*p, NULL, status);
1673 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1674 BUG_ON(*buflen < 0);
1675 return 0;
1676}
1677
b37ad28b 1678static inline __be32
2ebbc012 1679nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1680{
1681 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1682}
1683
b37ad28b 1684static inline __be32
2ebbc012 1685nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1686{
1687 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1688}
1689
b37ad28b 1690static inline __be32
1da177e4 1691nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1692 __be32 **p, int *buflen)
1da177e4
LT		 1693{
1694 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1695}
1696
42ca0993
BF		 1697#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1698 FATTR4_WORD0_RDATTR_ERROR)
1699#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1700
b37ad28b 1701static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1702{
1703 /* As per referral draft: */
1704 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1705 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1706 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1707 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1708 *rdattr_err = NFSERR_MOVED;
1709 else
1710 return nfserr_moved;
1711 }
1712 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1713 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1714 return 0;
1715}
1da177e4
LT		 1716
1717/*
1718 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1719 * ourselves.
1720 *
1721 * @countp is the buffer size in _words_; upon successful return this becomes
1722 * replaced with the number of words written.
1723 */
b37ad28b 1724__be32
1da177e4 1725nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1726 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1727 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1728{
1729 u32 bmval0 = bmval[0];
1730 u32 bmval1 = bmval[1];
7e705706 1731 u32 bmval2 = bmval[2];
1da177e4
LT		 1732 struct kstat stat;
1733 struct svc_fh tempfh;
1734 struct kstatfs statfs;
1735 int buflen = *countp << 2;
2ebbc012 1736 __be32 *attrlenp;
1da177e4
LT		 1737 u32 dummy;
1738 u64 dummy64;
42ca0993 1739 u32 rdattr_err = 0;
2ebbc012 1740 __be32 *p = buffer;
b37ad28b 1741 __be32 status;
b8dd7b9a 1742 int err;
1da177e4
LT		 1743 int aclsupport = 0;
1744 struct nfs4_acl *acl = NULL;
7e705706
AA		 1745 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1746 u32 minorversion = resp->cstate.minorversion;
1da177e4
LT		 1747
1748 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 1749 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1750 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1751 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 1752
42ca0993 1753 if (exp->ex_fslocs.migrated) {
7e705706 1754 BUG_ON(bmval[2]);
42ca0993
BF		 1755 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1756 if (status)
1757 goto out;
1758 }
1759
54775491 1760 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1761 if (err)
1da177e4 1762 goto out_nfserr;
a16e92ed
BF		 1763 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1764 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1765 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1766 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1767 err = vfs_statfs(dentry, &statfs);
1768 if (err)
1da177e4
LT		 1769 goto out_nfserr;
1770 }
1771 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1772 fh_init(&tempfh, NFS4_FHSIZE);
1773 status = fh_compose(&tempfh, exp, dentry, NULL);
1774 if (status)
1775 goto out;
1776 fhp = &tempfh;
1777 }
1778 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1779 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1780 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1781 aclsupport = (err == 0);
1da177e4 1782 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1783 if (err == -EOPNOTSUPP)
1da177e4 1784 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1785 else if (err == -EINVAL) {
1da177e4
LT		 1786 status = nfserr_attrnotsupp;
1787 goto out;
b8dd7b9a 1788 } else if (err != 0)
1da177e4
LT		 1789 goto out_nfserr;
1790 }
1791 }
1792 if ((buflen -= 16) < 0)
1793 goto out_resource;
1794
7e705706
AA		 1795 if (unlikely(bmval2)) {
1796 WRITE32(3);
1797 WRITE32(bmval0);
1798 WRITE32(bmval1);
1799 WRITE32(bmval2);
1800 } else if (likely(bmval1)) {
1801 WRITE32(2);
1802 WRITE32(bmval0);
1803 WRITE32(bmval1);
1804 } else {
1805 WRITE32(1);
1806 WRITE32(bmval0);
1807 }
1da177e4
LT		 1808 attrlenp = p++; /* to be backfilled later */
1809
1810 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 1811 u32 word0 = nfsd_suppattrs0(minorversion);
1812 u32 word1 = nfsd_suppattrs1(minorversion);
1813 u32 word2 = nfsd_suppattrs2(minorversion);
1814
1da177e4
LT		 1815 if ((buflen -= 12) < 0)
1816 goto out_resource;
42ca0993
BF		 1817 if (!aclsupport)
1818 word0 &= ~FATTR4_WORD0_ACL;
7e705706
AA		 1819 if (!word2) {
1820 WRITE32(2);
1821 WRITE32(word0);
1822 WRITE32(word1);
1823 } else {
1824 WRITE32(3);
1825 WRITE32(word0);
1826 WRITE32(word1);
1827 WRITE32(word2);
1828 }
1da177e4
LT		 1829 }
1830 if (bmval0 & FATTR4_WORD0_TYPE) {
1831 if ((buflen -= 4) < 0)
1832 goto out_resource;
1833 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1834 if (dummy == NF4BAD)
1835 goto out_serverfault;
1836 WRITE32(dummy);
1837 }
1838 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1839 if ((buflen -= 4) < 0)
1840 goto out_resource;
49640001 1841 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1842 WRITE32(NFS4_FH_PERSISTENT);
49640001 1843 else
e34ac862 1844 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1845 }
1846 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 1847 if ((buflen -= 8) < 0)
1848 goto out_resource;
c654b8a9 1849 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 1850 }
1851 if (bmval0 & FATTR4_WORD0_SIZE) {
1852 if ((buflen -= 8) < 0)
1853 goto out_resource;
1854 WRITE64(stat.size);
1855 }
1856 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1857 if ((buflen -= 4) < 0)
1858 goto out_resource;
1859 WRITE32(1);
1860 }
1861 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1862 if ((buflen -= 4) < 0)
1863 goto out_resource;
1864 WRITE32(1);
1865 }
1866 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1867 if ((buflen -= 4) < 0)
1868 goto out_resource;
1869 WRITE32(0);
1870 }
1871 if (bmval0 & FATTR4_WORD0_FSID) {
1872 if ((buflen -= 16) < 0)
1873 goto out_resource;
42ca0993
BF		 1874 if (exp->ex_fslocs.migrated) {
1875 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1876 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1877 } else switch(fsid_source(fhp)) {
1878 case FSIDSOURCE_FSID:
1da177e4
LT		 1879 WRITE64((u64)exp->ex_fsid);
1880 WRITE64((u64)0);
af6a4e28
N		 1881 break;
1882 case FSIDSOURCE_DEV:
1da177e4
LT		 1883 WRITE32(0);
1884 WRITE32(MAJOR(stat.dev));
1885 WRITE32(0);
1886 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1887 break;
1888 case FSIDSOURCE_UUID:
1889 WRITEMEM(exp->ex_uuid, 16);
1890 break;
1da177e4
LT		 1891 }
1892 }
1893 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1894 if ((buflen -= 4) < 0)
1895 goto out_resource;
1896 WRITE32(0);
1897 }
1898 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1899 if ((buflen -= 4) < 0)
1900 goto out_resource;
1901 WRITE32(NFSD_LEASE_TIME);
1902 }
1903 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1904 if ((buflen -= 4) < 0)
1905 goto out_resource;
42ca0993 1906 WRITE32(rdattr_err);
1da177e4
LT		 1907 }
1908 if (bmval0 & FATTR4_WORD0_ACL) {
1909 struct nfs4_ace *ace;
1da177e4
LT		 1910
1911 if (acl == NULL) {
1912 if ((buflen -= 4) < 0)
1913 goto out_resource;
1914
1915 WRITE32(0);
1916 goto out_acl;
1917 }
1918 if ((buflen -= 4) < 0)
1919 goto out_resource;
1920 WRITE32(acl->naces);
1921
28e05dd8 1922 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1923 if ((buflen -= 4*3) < 0)
1924 goto out_resource;
1925 WRITE32(ace->type);
1926 WRITE32(ace->flag);
1927 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1928 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1929 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1930 &p, &buflen);
1931 if (status == nfserr_resource)
1932 goto out_resource;
1933 if (status)
1934 goto out;
1935 }
1936 }
1937out_acl:
1938 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1939 if ((buflen -= 4) < 0)
1940 goto out_resource;
1941 WRITE32(aclsupport ?
1942 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1943 }
1944 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1945 if ((buflen -= 4) < 0)
1946 goto out_resource;
1947 WRITE32(1);
1948 }
1949 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1950 if ((buflen -= 4) < 0)
1951 goto out_resource;
1952 WRITE32(1);
1953 }
1954 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1955 if ((buflen -= 4) < 0)
1956 goto out_resource;
1957 WRITE32(1);
1958 }
1959 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1960 if ((buflen -= 4) < 0)
1961 goto out_resource;
1962 WRITE32(1);
1963 }
1964 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1965 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1966 if (buflen < 0)
1967 goto out_resource;
1968 WRITE32(fhp->fh_handle.fh_size);
1969 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1970 }
1971 if (bmval0 & FATTR4_WORD0_FILEID) {
1972 if ((buflen -= 8) < 0)
1973 goto out_resource;
40ee5dc6 1974 WRITE64(stat.ino);
1da177e4
LT		 1975 }
1976 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1977 if ((buflen -= 8) < 0)
1978 goto out_resource;
1979 WRITE64((u64) statfs.f_ffree);
1980 }
1981 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1982 if ((buflen -= 8) < 0)
1983 goto out_resource;
1984 WRITE64((u64) statfs.f_ffree);
1985 }
1986 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1987 if ((buflen -= 8) < 0)
1988 goto out_resource;
1989 WRITE64((u64) statfs.f_files);
1990 }
81c3f413
BF		 1991 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1992 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1993 if (status == nfserr_resource)
1994 goto out_resource;
1995 if (status)
1996 goto out;
1997 }
1da177e4
LT		 1998 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1999 if ((buflen -= 4) < 0)
2000 goto out_resource;
2001 WRITE32(1);
2002 }
2003 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2004 if ((buflen -= 8) < 0)
2005 goto out_resource;
2006 WRITE64(~(u64)0);
2007 }
2008 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2009 if ((buflen -= 4) < 0)
2010 goto out_resource;
2011 WRITE32(255);
2012 }
2013 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2014 if ((buflen -= 4) < 0)
2015 goto out_resource;
a16e92ed 2016 WRITE32(statfs.f_namelen);
1da177e4
LT		 2017 }
2018 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2019 if ((buflen -= 8) < 0)
2020 goto out_resource;
7adae489 2021 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2022 }
2023 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2024 if ((buflen -= 8) < 0)
2025 goto out_resource;
7adae489 2026 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2027 }
2028 if (bmval1 & FATTR4_WORD1_MODE) {
2029 if ((buflen -= 4) < 0)
2030 goto out_resource;
2031 WRITE32(stat.mode & S_IALLUGO);
2032 }
2033 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2034 if ((buflen -= 4) < 0)
2035 goto out_resource;
2036 WRITE32(1);
2037 }
2038 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2039 if ((buflen -= 4) < 0)
2040 goto out_resource;
2041 WRITE32(stat.nlink);
2042 }
2043 if (bmval1 & FATTR4_WORD1_OWNER) {
2044 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2045 if (status == nfserr_resource)
2046 goto out_resource;
2047 if (status)
2048 goto out;
2049 }
2050 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2051 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2052 if (status == nfserr_resource)
2053 goto out_resource;
2054 if (status)
2055 goto out;
2056 }
2057 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2058 if ((buflen -= 8) < 0)
2059 goto out_resource;
2060 WRITE32((u32) MAJOR(stat.rdev));
2061 WRITE32((u32) MINOR(stat.rdev));
2062 }
2063 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2064 if ((buflen -= 8) < 0)
2065 goto out_resource;
2066 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2067 WRITE64(dummy64);
2068 }
2069 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2070 if ((buflen -= 8) < 0)
2071 goto out_resource;
2072 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2073 WRITE64(dummy64);
2074 }
2075 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2076 if ((buflen -= 8) < 0)
2077 goto out_resource;
2078 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2079 WRITE64(dummy64);
2080 }
2081 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2082 if ((buflen -= 8) < 0)
2083 goto out_resource;
2084 dummy64 = (u64)stat.blocks << 9;
2085 WRITE64(dummy64);
2086 }
2087 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2088 if ((buflen -= 12) < 0)
2089 goto out_resource;
2090 WRITE32(0);
2091 WRITE32(stat.atime.tv_sec);
2092 WRITE32(stat.atime.tv_nsec);
2093 }
2094 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2095 if ((buflen -= 12) < 0)
2096 goto out_resource;
2097 WRITE32(0);
2098 WRITE32(1);
2099 WRITE32(0);
2100 }
2101 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2102 if ((buflen -= 12) < 0)
2103 goto out_resource;
2104 WRITE32(0);
2105 WRITE32(stat.ctime.tv_sec);
2106 WRITE32(stat.ctime.tv_nsec);
2107 }
2108 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2109 if ((buflen -= 12) < 0)
2110 goto out_resource;
2111 WRITE32(0);
2112 WRITE32(stat.mtime.tv_sec);
2113 WRITE32(stat.mtime.tv_nsec);
2114 }
2115 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2116 if ((buflen -= 8) < 0)
2117 goto out_resource;
406a7ea9
FF		 2118 /*
2119 * Get parent's attributes if not ignoring crossmount
2120 * and this is the root of a cross-mounted filesystem.
2121 */
2122 if (ignore_crossmnt == 0 &&
54775491
JB		 2123 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2124 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2125 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 2126 if (err)
2127 goto out_nfserr;
2128 }
2129 WRITE64(stat.ino);
1da177e4 2130 }
8c18f205
BH		 2131 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2132 WRITE32(3);
2133 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2134 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2135 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2136 }
7e705706 2137
1da177e4
LT		 2138 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2139 *countp = p - buffer;
2140 status = nfs_ok;
2141
2142out:
28e05dd8 2143 kfree(acl);
1da177e4
LT		 2144 if (fhp == &tempfh)
2145 fh_put(&tempfh);
2146 return status;
2147out_nfserr:
b8dd7b9a 2148 status = nfserrno(err);
1da177e4
LT		 2149 goto out;
2150out_resource:
2151 *countp = 0;
2152 status = nfserr_resource;
2153 goto out;
2154out_serverfault:
2155 status = nfserr_serverfault;
2156 goto out;
2157}
2158
c0ce6ec8
BF		 2159static inline int attributes_need_mount(u32 *bmval)
2160{
2161 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2162 return 1;
2163 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2164 return 1;
2165 return 0;
2166}
2167
b37ad28b 2168static __be32
1da177e4 2169nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2170 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2171{
2172 struct svc_export *exp = cd->rd_fhp->fh_export;
2173 struct dentry *dentry;
b37ad28b 2174 __be32 nfserr;
406a7ea9 2175 int ignore_crossmnt = 0;
1da177e4
LT		 2176
2177 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2178 if (IS_ERR(dentry))
2179 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2180 if (!dentry->d_inode) {
2181 /*
2182 * nfsd_buffered_readdir drops the i_mutex between
2183 * readdir and calling this callback, leaving a window
2184 * where this directory entry could have gone away.
2185 */
2186 dput(dentry);
2187 return nfserr_noent;
2188 }
1da177e4
LT		 2189
2190 exp_get(exp);
406a7ea9
FF		 2191 /*
2192 * In the case of a mountpoint, the client may be asking for
2193 * attributes that are only properties of the underlying filesystem
2194 * as opposed to the cross-mounted file system. In such a case,
2195 * we will not follow the cross mount and will fill the attribtutes
2196 * directly from the mountpoint dentry.
2197 */
c0ce6ec8 2198 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2199 ignore_crossmnt = 1;
2200 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2201 int err;
2202
dcb488a3
AA		 2203 /*
2204 * Why the heck aren't we just using nfsd_lookup??
2205 * Different "."/".." handling? Something else?
2206 * At least, add a comment here to explain....
2207 */
021d3a72
BF		 2208 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2209 if (err) {
2210 nfserr = nfserrno(err);
1da177e4
LT		 2211 goto out_put;
2212 }
dcb488a3
AA		 2213 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2214 if (nfserr)
2215 goto out_put;
1da177e4
LT		 2216
2217 }
2218 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2219 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2220out_put:
2221 dput(dentry);
2222 exp_put(exp);
2223 return nfserr;
2224}
2225
2ebbc012 2226static __be32 *
b37ad28b 2227nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2228{
2ebbc012 2229 __be32 *attrlenp;
1da177e4
LT		 2230
2231 if (buflen < 6)
2232 return NULL;
2233 *p++ = htonl(2);
2234 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2235 *p++ = htonl(0); /* bmval1 */
2236
2237 attrlenp = p++;
2238 *p++ = nfserr; /* no htonl */
2239 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2240 return p;
2241}
2242
2243static int
a0ad13ef
N		 2244nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2245 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2246{
a0ad13ef 2247 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2248 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2249 int buflen;
2ebbc012 2250 __be32 *p = cd->buffer;
b2c0cea6 2251 __be32 *cookiep;
b37ad28b 2252 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2253
2254 /* In nfsv4, "." and ".." never make it onto the wire.. */
2255 if (name && isdotent(name, namlen)) {
2256 cd->common.err = nfs_ok;
2257 return 0;
2258 }
2259
2260 if (cd->offset)
2261 xdr_encode_hyper(cd->offset, (u64) offset);
2262
2263 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2264 if (buflen < 0)
2265 goto fail;
2266
2267 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2268 cookiep = p;
1da177e4
LT		 2269 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2270 p = xdr_encode_array(p, name, namlen); /* name length & name */
2271
2272 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2273 switch (nfserr) {
2274 case nfs_ok:
2275 p += buflen;
2276 break;
2277 case nfserr_resource:
2278 nfserr = nfserr_toosmall;
2279 goto fail;
2280 case nfserr_dropit:
2281 goto fail;
b2c0cea6
BF		 2282 case nfserr_noent:
2283 goto skip_entry;
1da177e4
LT		 2284 default:
2285 /*
2286 * If the client requested the RDATTR_ERROR attribute,
2287 * we stuff the error code into this attribute
2288 * and continue. If this attribute was not requested,
2289 * then in accordance with the spec, we fail the
2290 * entire READDIR operation(!)
2291 */
2292 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2293 goto fail;
1da177e4 2294 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2295 if (p == NULL) {
2296 nfserr = nfserr_toosmall;
1da177e4 2297 goto fail;
34081efc 2298 }
1da177e4
LT		 2299 }
2300 cd->buflen -= (p - cd->buffer);
2301 cd->buffer = p;
b2c0cea6
BF		 2302 cd->offset = cookiep;
2303skip_entry:
1da177e4
LT		 2304 cd->common.err = nfs_ok;
2305 return 0;
2306fail:
2307 cd->common.err = nfserr;
2308 return -EINVAL;
2309}
2310
e2f282b9
BH		 2311static void
2312nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2313{
bc749ca4 2314 __be32 *p;
e2f282b9
BH		 2315
2316 RESERVE_SPACE(sizeof(stateid_t));
2317 WRITE32(sid->si_generation);
2318 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2319 ADJUST_ARGS();
2320}
2321
695e12f8 2322static __be32
b37ad28b 2323nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2324{
bc749ca4 2325 __be32 *p;
1da177e4
LT		 2326
2327 if (!nfserr) {
2328 RESERVE_SPACE(8);
2329 WRITE32(access->ac_supported);
2330 WRITE32(access->ac_resp_access);
2331 ADJUST_ARGS();
2332 }
695e12f8 2333 return nfserr;
1da177e4
LT		 2334}
2335
695e12f8 2336static __be32
b37ad28b 2337nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2338{
2339 ENCODE_SEQID_OP_HEAD;
2340
e2f282b9
BH		 2341 if (!nfserr)
2342 nfsd4_encode_stateid(resp, &close->cl_stateid);
2343
1da177e4 2344 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2345 return nfserr;
1da177e4
LT		 2346}
2347
2348
695e12f8 2349static __be32
b37ad28b 2350nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2351{
bc749ca4 2352 __be32 *p;
1da177e4
LT		 2353
2354 if (!nfserr) {
2355 RESERVE_SPACE(8);
2356 WRITEMEM(commit->co_verf.data, 8);
2357 ADJUST_ARGS();
2358 }
695e12f8 2359 return nfserr;
1da177e4
LT		 2360}
2361
695e12f8 2362static __be32
b37ad28b 2363nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2364{
bc749ca4 2365 __be32 *p;
1da177e4
LT		 2366
2367 if (!nfserr) {
2368 RESERVE_SPACE(32);
c654b8a9 2369 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2370 WRITE32(2);
2371 WRITE32(create->cr_bmval[0]);
2372 WRITE32(create->cr_bmval[1]);
2373 ADJUST_ARGS();
2374 }
695e12f8 2375 return nfserr;
1da177e4
LT		 2376}
2377
b37ad28b
AV		 2378static __be32
2379nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2380{
2381 struct svc_fh *fhp = getattr->ga_fhp;
2382 int buflen;
2383
2384 if (nfserr)
2385 return nfserr;
2386
2387 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2388 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2389 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2390 resp->rqstp, 0);
1da177e4
LT		 2391 if (!nfserr)
2392 resp->p += buflen;
2393 return nfserr;
2394}
2395
695e12f8
BH		 2396static __be32
2397nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2398{
695e12f8 2399 struct svc_fh *fhp = *fhpp;
1da177e4 2400 unsigned int len;
bc749ca4 2401 __be32 *p;
1da177e4
LT		 2402
2403 if (!nfserr) {
2404 len = fhp->fh_handle.fh_size;
2405 RESERVE_SPACE(len + 4);
2406 WRITE32(len);
2407 WRITEMEM(&fhp->fh_handle.fh_base, len);
2408 ADJUST_ARGS();
2409 }
695e12f8 2410 return nfserr;
1da177e4
LT		 2411}
2412
2413/*
2414* Including all fields other than the name, a LOCK4denied structure requires
2415* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2416*/
2417static void
2418nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2419{
bc749ca4 2420 __be32 *p;
1da177e4
LT		 2421
2422 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2423 WRITE64(ld->ld_start);
2424 WRITE64(ld->ld_length);
2425 WRITE32(ld->ld_type);
2426 if (ld->ld_sop) {
2427 WRITEMEM(&ld->ld_clientid, 8);
2428 WRITE32(ld->ld_sop->so_owner.len);
2429 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2430 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2431 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2432 WRITE64((u64)0); /* clientid */
2433 WRITE32(0); /* length of owner name */
2434 }
2435 ADJUST_ARGS();
2436}
2437
695e12f8 2438static __be32
b37ad28b 2439nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2440{
1da177e4
LT		 2441 ENCODE_SEQID_OP_HEAD;
2442
e2f282b9
BH		 2443 if (!nfserr)
2444 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2445 else if (nfserr == nfserr_denied)
1da177e4
LT		 2446 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2447
3a65588a 2448 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2449 return nfserr;
1da177e4
LT		 2450}
2451
695e12f8 2452static __be32
b37ad28b 2453nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2454{
2455 if (nfserr == nfserr_denied)
2456 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2457 return nfserr;
1da177e4
LT		 2458}
2459
695e12f8 2460static __be32
b37ad28b 2461nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2462{
2463 ENCODE_SEQID_OP_HEAD;
2464
e2f282b9
BH		 2465 if (!nfserr)
2466 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2467
1da177e4 2468 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2469 return nfserr;
1da177e4
LT		 2470}
2471
2472
695e12f8 2473static __be32
b37ad28b 2474nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2475{
bc749ca4 2476 __be32 *p;
1da177e4
LT		 2477
2478 if (!nfserr) {
2479 RESERVE_SPACE(20);
c654b8a9 2480 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2481 ADJUST_ARGS();
2482 }
695e12f8 2483 return nfserr;
1da177e4
LT		 2484}
2485
2486
695e12f8 2487static __be32
b37ad28b 2488nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2489{
bc749ca4 2490 __be32 *p;
1da177e4
LT		 2491 ENCODE_SEQID_OP_HEAD;
2492
2493 if (nfserr)
2494 goto out;
2495
e2f282b9
BH		 2496 nfsd4_encode_stateid(resp, &open->op_stateid);
2497 RESERVE_SPACE(40);
c654b8a9 2498 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2499 WRITE32(open->op_rflags);
2500 WRITE32(2);
2501 WRITE32(open->op_bmval[0]);
2502 WRITE32(open->op_bmval[1]);
2503 WRITE32(open->op_delegate_type);
2504 ADJUST_ARGS();
2505
2506 switch (open->op_delegate_type) {
2507 case NFS4_OPEN_DELEGATE_NONE:
2508 break;
2509 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2510 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2511 RESERVE_SPACE(20);
7b190fec 2512 WRITE32(open->op_recall);
1da177e4
LT		 2513
2514 /*
2515 * TODO: ACE's in delegations
2516 */
2517 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2518 WRITE32(0);
2519 WRITE32(0);
2520 WRITE32(0); /* XXX: is NULL principal ok? */
2521 ADJUST_ARGS();
2522 break;
2523 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2524 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2525 RESERVE_SPACE(32);
1da177e4
LT		 2526 WRITE32(0);
2527
2528 /*
2529 * TODO: space_limit's in delegations
2530 */
2531 WRITE32(NFS4_LIMIT_SIZE);
2532 WRITE32(~(u32)0);
2533 WRITE32(~(u32)0);
2534
2535 /*
2536 * TODO: ACE's in delegations
2537 */
2538 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2539 WRITE32(0);
2540 WRITE32(0);
2541 WRITE32(0); /* XXX: is NULL principal ok? */
2542 ADJUST_ARGS();
2543 break;
2544 default:
2545 BUG();
2546 }
2547 /* XXX save filehandle here */
2548out:
2549 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2550 return nfserr;
1da177e4
LT		 2551}
2552
695e12f8 2553static __be32
b37ad28b 2554nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2555{
2556 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2557
2558 if (!nfserr)
2559 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2560
2561 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2562 return nfserr;
1da177e4
LT		 2563}
2564
695e12f8 2565static __be32
b37ad28b 2566nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2567{
2568 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2569
2570 if (!nfserr)
2571 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2572
2573 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2574 return nfserr;
1da177e4
LT		 2575}
2576
b37ad28b
AV		 2577static __be32
2578nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2579 struct nfsd4_read *read)
1da177e4
LT		 2580{
2581 u32 eof;
2582 int v, pn;
2583 unsigned long maxcount;
2584 long len;
bc749ca4 2585 __be32 *p;
1da177e4
LT		 2586
2587 if (nfserr)
2588 return nfserr;
2589 if (resp->xbuf->page_len)
2590 return nfserr_resource;
2591
2592 RESERVE_SPACE(8); /* eof flag and byte count */
2593
7adae489 2594 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2595 if (maxcount > read->rd_length)
2596 maxcount = read->rd_length;
2597
2598 len = maxcount;
2599 v = 0;
2600 while (len > 0) {
44524359 2601 pn = resp->rqstp->rq_resused++;
3cc03b16 2602 resp->rqstp->rq_vec[v].iov_base =
44524359 2603 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2604 resp->rqstp->rq_vec[v].iov_len =
44524359 2605 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2606 v++;
2607 len -= PAGE_SIZE;
2608 }
2609 read->rd_vlen = v;
2610
2611 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2612 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2613 &maxcount);
2614
2615 if (nfserr == nfserr_symlink)
2616 nfserr = nfserr_inval;
2617 if (nfserr)
2618 return nfserr;
44524359
N		 2619 eof = (read->rd_offset + maxcount >=
2620 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2621
2622 WRITE32(eof);
2623 WRITE32(maxcount);
2624 ADJUST_ARGS();
6ed6decc
N		 2625 resp->xbuf->head[0].iov_len = (char*)p
2626 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2627 resp->xbuf->page_len = maxcount;
2628
6ed6decc 2629 /* Use rest of head for padding and remaining ops: */
6ed6decc 2630 resp->xbuf->tail[0].iov_base = p;
1da177e4 2631 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2632 if (maxcount&3) {
6ed6decc
N		 2633 RESERVE_SPACE(4);
2634 WRITE32(0);
1da177e4
LT		 2635 resp->xbuf->tail[0].iov_base += maxcount&3;
2636 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2637 ADJUST_ARGS();
1da177e4
LT		 2638 }
2639 return 0;
2640}
2641
b37ad28b
AV		 2642static __be32
2643nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2644{
2645 int maxcount;
2646 char *page;
bc749ca4 2647 __be32 *p;
1da177e4
LT		 2648
2649 if (nfserr)
2650 return nfserr;
2651 if (resp->xbuf->page_len)
2652 return nfserr_resource;
2653
44524359 2654 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2655
2656 maxcount = PAGE_SIZE;
2657 RESERVE_SPACE(4);
2658
2659 /*
2660 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2661 * if they would overflow the buffer. Is this kosher in NFSv4? If
2662 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2663 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2664 */
2665 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2666 if (nfserr == nfserr_isdir)
2667 return nfserr_inval;
2668 if (nfserr)
2669 return nfserr;
2670
2671 WRITE32(maxcount);
2672 ADJUST_ARGS();
6ed6decc
N		 2673 resp->xbuf->head[0].iov_len = (char*)p
2674 - (char*)resp->xbuf->head[0].iov_base;
2675 resp->xbuf->page_len = maxcount;
1da177e4 2676
6ed6decc 2677 /* Use rest of head for padding and remaining ops: */
6ed6decc 2678 resp->xbuf->tail[0].iov_base = p;
1da177e4 2679 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2680 if (maxcount&3) {
6ed6decc
N		 2681 RESERVE_SPACE(4);
2682 WRITE32(0);
1da177e4
LT		 2683 resp->xbuf->tail[0].iov_base += maxcount&3;
2684 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2685 ADJUST_ARGS();
1da177e4
LT		 2686 }
2687 return 0;
2688}
2689
b37ad28b
AV		 2690static __be32
2691nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2692{
2693 int maxcount;
2694 loff_t offset;
2ebbc012 2695 __be32 *page, *savep, *tailbase;
bc749ca4 2696 __be32 *p;
1da177e4
LT		 2697
2698 if (nfserr)
2699 return nfserr;
2700 if (resp->xbuf->page_len)
2701 return nfserr_resource;
2702
2703 RESERVE_SPACE(8); /* verifier */
2704 savep = p;
2705
2706 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2707 WRITE32(0);
2708 WRITE32(0);
2709 ADJUST_ARGS();
2710 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2711 tailbase = p;
1da177e4
LT		 2712
2713 maxcount = PAGE_SIZE;
2714 if (maxcount > readdir->rd_maxcount)
2715 maxcount = readdir->rd_maxcount;
2716
2717 /*
2718 * Convert from bytes to words, account for the two words already
2719 * written, make sure to leave two words at the end for the next
2720 * pointer and eof field.
2721 */
2722 maxcount = (maxcount >> 2) - 4;
2723 if (maxcount < 0) {
2724 nfserr = nfserr_toosmall;
2725 goto err_no_verf;
2726 }
2727
44524359 2728 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2729 readdir->common.err = 0;
2730 readdir->buflen = maxcount;
2731 readdir->buffer = page;
2732 readdir->offset = NULL;
2733
2734 offset = readdir->rd_cookie;
2735 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2736 &offset,
2737 &readdir->common, nfsd4_encode_dirent);
2738 if (nfserr == nfs_ok &&
2739 readdir->common.err == nfserr_toosmall &&
2740 readdir->buffer == page)
2741 nfserr = nfserr_toosmall;
2742 if (nfserr == nfserr_symlink)
2743 nfserr = nfserr_notdir;
2744 if (nfserr)
2745 goto err_no_verf;
2746
2747 if (readdir->offset)
2748 xdr_encode_hyper(readdir->offset, offset);
2749
2750 p = readdir->buffer;
2751 *p++ = 0; /* no more entries */
2752 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2753 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2754 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2755
bb6e8a9f 2756 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2757 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2758 resp->xbuf->tail[0].iov_len = 0;
2759 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2760 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2761
2762 return 0;
2763err_no_verf:
2764 p = savep;
2765 ADJUST_ARGS();
2766 return nfserr;
2767}
2768
695e12f8 2769static __be32
b37ad28b 2770nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 2771{
bc749ca4 2772 __be32 *p;
1da177e4
LT		 2773
2774 if (!nfserr) {
2775 RESERVE_SPACE(20);
c654b8a9 2776 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 2777 ADJUST_ARGS();
2778 }
695e12f8 2779 return nfserr;
1da177e4
LT		 2780}
2781
695e12f8 2782static __be32
b37ad28b 2783nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 2784{
bc749ca4 2785 __be32 *p;
1da177e4
LT		 2786
2787 if (!nfserr) {
2788 RESERVE_SPACE(40);
c654b8a9
BF		 2789 write_cinfo(&p, &rename->rn_sinfo);
2790 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 2791 ADJUST_ARGS();
2792 }
695e12f8 2793 return nfserr;
1da177e4
LT		 2794}
2795
695e12f8 2796static __be32
ca5c8cde 2797nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2798 struct nfsd4_secinfo *secinfo)
2799{
2800 int i = 0;
2801 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2802 u32 nflavs;
2803 struct exp_flavor_info *flavs;
2804 struct exp_flavor_info def_flavs[2];
bc749ca4 2805 __be32 *p;
dcb488a3
AA		 2806
2807 if (nfserr)
2808 goto out;
4796f457
BF		 2809 if (exp->ex_nflavors) {
2810 flavs = exp->ex_flavors;
2811 nflavs = exp->ex_nflavors;
2812 } else { /* Handling of some defaults in absence of real secinfo: */
2813 flavs = def_flavs;
2814 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2815 nflavs = 2;
2816 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2817 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2818 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2819 nflavs = 1;
2820 flavs[0].pseudoflavor
2821 = svcauth_gss_flavor(exp->ex_client);
2822 } else {
2823 nflavs = 1;
2824 flavs[0].pseudoflavor
2825 = exp->ex_client->flavour->flavour;
2826 }
2827 }
2828
dcb488a3 2829 RESERVE_SPACE(4);
4796f457 2830 WRITE32(nflavs);
dcb488a3 2831 ADJUST_ARGS();
4796f457
BF		 2832 for (i = 0; i < nflavs; i++) {
2833 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2834 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2835
2836 if (gm) {
2837 RESERVE_SPACE(4);
2838 WRITE32(RPC_AUTH_GSS);
2839 ADJUST_ARGS();
2840 RESERVE_SPACE(4 + gm->gm_oid.len);
2841 WRITE32(gm->gm_oid.len);
2842 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2843 ADJUST_ARGS();
2844 RESERVE_SPACE(4);
2845 WRITE32(0); /* qop */
2846 ADJUST_ARGS();
2847 RESERVE_SPACE(4);
2848 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2849 ADJUST_ARGS();
2850 gss_mech_put(gm);
2851 } else {
2852 RESERVE_SPACE(4);
2853 WRITE32(flav);
2854 ADJUST_ARGS();
2855 }
2856 }
2857out:
2858 if (exp)
2859 exp_put(exp);
695e12f8 2860 return nfserr;
dcb488a3
AA		 2861}
2862
1da177e4
LT		 2863/*
2864 * The SETATTR encode routine is special -- it always encodes a bitmap,
2865 * regardless of the error status.
2866 */
695e12f8 2867static __be32
b37ad28b 2868nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 2869{
bc749ca4 2870 __be32 *p;
1da177e4
LT		 2871
2872 RESERVE_SPACE(12);
2873 if (nfserr) {
2874 WRITE32(2);
2875 WRITE32(0);
2876 WRITE32(0);
2877 }
2878 else {
2879 WRITE32(2);
2880 WRITE32(setattr->sa_bmval[0]);
2881 WRITE32(setattr->sa_bmval[1]);
2882 }
2883 ADJUST_ARGS();
695e12f8 2884 return nfserr;
1da177e4
LT		 2885}
2886
695e12f8 2887static __be32
b37ad28b 2888nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 2889{
bc749ca4 2890 __be32 *p;
1da177e4
LT		 2891
2892 if (!nfserr) {
2893 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2894 WRITEMEM(&scd->se_clientid, 8);
2895 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2896 ADJUST_ARGS();
2897 }
2898 else if (nfserr == nfserr_clid_inuse) {
2899 RESERVE_SPACE(8);
2900 WRITE32(0);
2901 WRITE32(0);
2902 ADJUST_ARGS();
2903 }
695e12f8 2904 return nfserr;
1da177e4
LT		 2905}
2906
695e12f8 2907static __be32
b37ad28b 2908nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 2909{
bc749ca4 2910 __be32 *p;
1da177e4
LT		 2911
2912 if (!nfserr) {
2913 RESERVE_SPACE(16);
2914 WRITE32(write->wr_bytes_written);
2915 WRITE32(write->wr_how_written);
2916 WRITEMEM(write->wr_verifier.data, 8);
2917 ADJUST_ARGS();
2918 }
695e12f8 2919 return nfserr;
1da177e4
LT		 2920}
2921
2db134eb
AA		 2922static __be32
2923nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2924 struct nfsd4_exchange_id *exid)
2925{
bc749ca4 2926 __be32 *p;
0733d213
AA		 2927 char *major_id;
2928 char *server_scope;
2929 int major_id_sz;
2930 int server_scope_sz;
2931 uint64_t minor_id = 0;
2932
2933 if (nfserr)
2934 return nfserr;
2935
2936 major_id = utsname()->nodename;
2937 major_id_sz = strlen(major_id);
2938 server_scope = utsname()->nodename;
2939 server_scope_sz = strlen(server_scope);
2940
2941 RESERVE_SPACE(
2942 8 /* eir_clientid */ +
2943 4 /* eir_sequenceid */ +
2944 4 /* eir_flags */ +
2945 4 /* spr_how (SP4_NONE) */ +
2946 8 /* so_minor_id */ +
2947 4 /* so_major_id.len */ +
2948 (XDR_QUADLEN(major_id_sz) * 4) +
2949 4 /* eir_server_scope.len */ +
2950 (XDR_QUADLEN(server_scope_sz) * 4) +
2951 4 /* eir_server_impl_id.count (0) */);
2952
2953 WRITEMEM(&exid->clientid, 8);
2954 WRITE32(exid->seqid);
2955 WRITE32(exid->flags);
2956
2957 /* state_protect4_r. Currently only support SP4_NONE */
2958 BUG_ON(exid->spa_how != SP4_NONE);
2959 WRITE32(exid->spa_how);
2960
2961 /* The server_owner struct */
2962 WRITE64(minor_id); /* Minor id */
2963 /* major id */
2964 WRITE32(major_id_sz);
2965 WRITEMEM(major_id, major_id_sz);
2966
2967 /* Server scope */
2968 WRITE32(server_scope_sz);
2969 WRITEMEM(server_scope, server_scope_sz);
2970
2971 /* Implementation id */
2972 WRITE32(0); /* zero length nfs_impl_id4 array */
2973 ADJUST_ARGS();
2974 return 0;
2db134eb
AA		 2975}
2976
2977static __be32
2978nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2979 struct nfsd4_create_session *sess)
2980{
bc749ca4 2981 __be32 *p;
ec6b5d7b
AA		 2982
2983 if (nfserr)
2984 return nfserr;
2985
2986 RESERVE_SPACE(24);
2987 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2988 WRITE32(sess->seqid);
2989 WRITE32(sess->flags);
2990 ADJUST_ARGS();
2991
2992 RESERVE_SPACE(28);
2993 WRITE32(0); /* headerpadsz */
2994 WRITE32(sess->fore_channel.maxreq_sz);
2995 WRITE32(sess->fore_channel.maxresp_sz);
2996 WRITE32(sess->fore_channel.maxresp_cached);
2997 WRITE32(sess->fore_channel.maxops);
2998 WRITE32(sess->fore_channel.maxreqs);
2999 WRITE32(sess->fore_channel.nr_rdma_attrs);
3000 ADJUST_ARGS();
3001
3002 if (sess->fore_channel.nr_rdma_attrs) {
3003 RESERVE_SPACE(4);
3004 WRITE32(sess->fore_channel.rdma_attrs);
3005 ADJUST_ARGS();
3006 }
3007
3008 RESERVE_SPACE(28);
3009 WRITE32(0); /* headerpadsz */
3010 WRITE32(sess->back_channel.maxreq_sz);
3011 WRITE32(sess->back_channel.maxresp_sz);
3012 WRITE32(sess->back_channel.maxresp_cached);
3013 WRITE32(sess->back_channel.maxops);
3014 WRITE32(sess->back_channel.maxreqs);
3015 WRITE32(sess->back_channel.nr_rdma_attrs);
3016 ADJUST_ARGS();
3017
3018 if (sess->back_channel.nr_rdma_attrs) {
3019 RESERVE_SPACE(4);
3020 WRITE32(sess->back_channel.rdma_attrs);
3021 ADJUST_ARGS();
3022 }
3023 return 0;
2db134eb
AA		 3024}
3025
3026static __be32
3027nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3028 struct nfsd4_destroy_session *destroy_session)
3029{
2db134eb
AA		 3030 return nfserr;
3031}
3032
bf864a31 3033__be32
2db134eb
AA		 3034nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3035 struct nfsd4_sequence *seq)
3036{
bc749ca4 3037 __be32 *p;
b85d4c01
BH		 3038
3039 if (nfserr)
3040 return nfserr;
3041
3042 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3043 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3044 WRITE32(seq->seqid);
3045 WRITE32(seq->slotid);
3046 WRITE32(seq->maxslots);
3047 /*
3048 * FIXME: for now:
3049 * target_maxslots = maxslots
3050 * status_flags = 0
3051 */
3052 WRITE32(seq->maxslots);
3053 WRITE32(0);
3054
3055 ADJUST_ARGS();
557ce264 3056 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3057 return 0;
2db134eb
AA		 3058}
3059
695e12f8
BH		 3060static __be32
3061nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3062{
3063 return nfserr;
3064}
3065
3066typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3067
2db134eb
AA		 3068/*
3069 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3070 * since we don't need to filter out obsolete ops as this is
3071 * done in the decoding phase.
3072 */
695e12f8 3073static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3074 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3075 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3076 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3077 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3078 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3079 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3080 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3081 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3082 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3083 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3084 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3085 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3086 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3087 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3088 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3089 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3090 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3091 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3092 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3093 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3094 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3095 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3097 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3098 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3099 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3100 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3101 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3102 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3103 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3104 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3105 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3106 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3107 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3108 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3109 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3110 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3111
3112 /* NFSv4.1 operations */
3113 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3115 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3116 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3117 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3118 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3119 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3121 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3122 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3123 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3125 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3127 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3132};
3133
496c262c
AA		 3134/*
3135 * Calculate the total amount of memory that the compound response has taken
3136 * after encoding the current operation.
3137 *
3138 * pad: add on 8 bytes for the next operation's op_code and status so that
3139 * there is room to cache a failure on the next operation.
3140 *
3141 * Compare this length to the session se_fmaxresp_cached.
3142 *
3143 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3144 * will be at least a page and will therefore hold the xdr_buf head.
3145 */
3146static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3147{
3148 int status = 0;
3149 struct xdr_buf *xb = &resp->rqstp->rq_res;
3150 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3151 struct nfsd4_session *session = NULL;
3152 struct nfsd4_slot *slot = resp->cstate.slot;
3153 u32 length, tlen = 0, pad = 8;
3154
3155 if (!nfsd4_has_session(&resp->cstate))
3156 return status;
3157
3158 session = resp->cstate.session;
557ce264 3159 if (session == NULL || slot->sl_cachethis == 0)
496c262c
AA		 3160 return status;
3161
3162 if (resp->opcnt >= args->opcnt)
3163 pad = 0; /* this is the last operation */
3164
3165 if (xb->page_len == 0) {
3166 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3167 } else {
3168 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3169 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3170
3171 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3172 }
3173 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3174 length, xb->page_len, tlen, pad);
3175
6c18ba9f 3176 if (length <= session->se_fchannel.maxresp_cached)
496c262c
AA		 3177 return status;
3178 else
3179 return nfserr_rep_too_big_to_cache;
3180}
3181
1da177e4
LT		 3182void
3183nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3184{
2ebbc012 3185 __be32 *statp;
bc749ca4 3186 __be32 *p;
1da177e4
LT		 3187
3188 RESERVE_SPACE(8);
3189 WRITE32(op->opnum);
3190 statp = p++; /* to be backfilled at the end */
3191 ADJUST_ARGS();
3192
695e12f8
BH		 3193 if (op->opnum == OP_ILLEGAL)
3194 goto status;
3195 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3196 !nfsd4_enc_ops[op->opnum]);
3197 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c
AA		 3198 /* nfsd4_check_drc_limit guarantees enough room for error status */
3199 if (!op->status && nfsd4_check_drc_limit(resp))
3200 op->status = nfserr_rep_too_big_to_cache;
695e12f8 3201status:
1da177e4
LT		 3202 /*
3203 * Note: We write the status directly, instead of using WRITE32(),
3204 * since it is already in network byte order.
3205 */
3206 *statp = op->status;
3207}
3208
3209/*
3210 * Encode the reply stored in the stateowner reply cache
3211 *
3212 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3213 * previously sent already encoded operation.
3214 *
3215 * called with nfs4_lock_state() held
3216 */
3217void
3218nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3219{
bc749ca4 3220 __be32 *p;
1da177e4
LT		 3221 struct nfs4_replay *rp = op->replay;
3222
3223 BUG_ON(!rp);
3224
3225 RESERVE_SPACE(8);
3226 WRITE32(op->opnum);
3227 *p++ = rp->rp_status; /* already xdr'ed */
3228 ADJUST_ARGS();
3229
3230 RESERVE_SPACE(rp->rp_buflen);
3231 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3232 ADJUST_ARGS();
3233}
3234
1da177e4 3235int
2ebbc012 3236nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3237{
3238 return xdr_ressize_check(rqstp, p);
3239}
3240
3241void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3242{
3243 if (args->ops != args->iops) {
3244 kfree(args->ops);
3245 args->ops = args->iops;
3246 }
f99d49ad
JJ		 3247 kfree(args->tmpp);
3248 args->tmpp = NULL;
1da177e4
LT		 3249 while (args->to_free) {
3250 struct tmpbuf *tb = args->to_free;
3251 args->to_free = tb->next;
3252 tb->release(tb->buf);
3253 kfree(tb);
3254 }
3255}
3256
3257int
2ebbc012 3258nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3259{
b37ad28b 3260 __be32 status;
1da177e4
LT		 3261
3262 args->p = p;
3263 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3264 args->pagelist = rqstp->rq_arg.pages;
3265 args->pagelen = rqstp->rq_arg.page_len;
3266 args->tmpp = NULL;
3267 args->to_free = NULL;
3268 args->ops = args->iops;
3269 args->rqstp = rqstp;
3270
3271 status = nfsd4_decode_compound(args);
3272 if (status) {
3273 nfsd4_release_compoundargs(args);
3274 }
3275 return !status;
3276}
3277
3278int
2ebbc012 3279nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3280{
3281 /*
3282 * All that remains is to write the tag and operation count...
3283 */
557ce264 3284 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3285 struct kvec *iov;
3286 p = resp->tagp;
3287 *p++ = htonl(resp->taglen);
3288 memcpy(p, resp->tag, resp->taglen);
3289 p += XDR_QUADLEN(resp->taglen);
3290 *p++ = htonl(resp->opcnt);
3291
3292 if (rqstp->rq_res.page_len)
3293 iov = &rqstp->rq_res.tail[0];
3294 else
3295 iov = &rqstp->rq_res.head[0];
3296 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3297 BUG_ON(iov->iov_len > PAGE_SIZE);
557ce264
AA		 3298 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
3299 nfsd4_store_cache_entry(resp);
3300 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3301 resp->cstate.slot->sl_inuse = false;
49557cc7 3302 nfsd4_put_session(resp->cstate.session);
da3846a2 3303 }
1da177e4
LT		 3304 return 1;
3305}
3306
3307/*
3308 * Local variables:
3309 * c-basic-offset: 8
3310 * End:
3311 */
kernel source for telekom puls (alcatel/mediatek)