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nfsd4: name->id mapping should fail with BADOWNER not BADNAME
[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
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
1da177e4 47#include <linux/nfsd_idmap.h>
1da177e4 48#include <linux/nfs4_acl.h>
4796f457 49#include <linux/sunrpc/svcauth_gss.h>
9a74af21
BH		 50
51#include "xdr4.h"
0a3adade 52#include "vfs.h"
1da177e4
LT		 53
54#define NFSDDBG_FACILITY NFSDDBG_XDR
55
42ca0993
BF		 56/*
57 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
58 * directory in order to indicate to the client that a filesystem boundary is present
59 * We use a fixed fsid for a referral
60 */
61#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
62#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
63
b37ad28b
AV		 64static __be32
65check_filename(char *str, int len, __be32 err)
1da177e4
LT		 66{
67 int i;
68
69 if (len == 0)
70 return nfserr_inval;
71 if (isdotent(str, len))
72 return err;
73 for (i = 0; i < len; i++)
74 if (str[i] == '/')
75 return err;
76 return 0;
77}
78
1da177e4 79#define DECODE_HEAD \
2ebbc012 80 __be32 *p; \
b37ad28b 81 __be32 status
1da177e4
LT		 82#define DECODE_TAIL \
83 status = 0; \
84out: \
85 return status; \
86xdr_error: \
817cb9d4
CL		 87 dprintk("NFSD: xdr error (%s:%d)\n", \
88 __FILE__, __LINE__); \
1da177e4
LT		 89 status = nfserr_bad_xdr; \
90 goto out
91
92#define READ32(x) (x) = ntohl(*p++)
93#define READ64(x) do { \
94 (x) = (u64)ntohl(*p++) << 32; \
95 (x) |= ntohl(*p++); \
96} while (0)
97#define READTIME(x) do { \
98 p++; \
99 (x) = ntohl(*p++); \
100 p++; \
101} while (0)
102#define READMEM(x,nbytes) do { \
103 x = (char *)p; \
104 p += XDR_QUADLEN(nbytes); \
105} while (0)
106#define SAVEMEM(x,nbytes) do { \
107 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
108 savemem(argp, p, nbytes) : \
109 (char *)p)) { \
817cb9d4
CL		 110 dprintk("NFSD: xdr error (%s:%d)\n", \
111 __FILE__, __LINE__); \
1da177e4
LT		 112 goto xdr_error; \
113 } \
114 p += XDR_QUADLEN(nbytes); \
115} while (0)
116#define COPYMEM(x,nbytes) do { \
117 memcpy((x), p, nbytes); \
118 p += XDR_QUADLEN(nbytes); \
119} while (0)
120
121/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
122#define READ_BUF(nbytes) do { \
123 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
124 p = argp->p; \
125 argp->p += XDR_QUADLEN(nbytes); \
126 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
1da177e4
LT		 129 goto xdr_error; \
130 } \
131} while (0)
132
ca2a05aa 133static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 134{
135 /* We want more bytes than seem to be available.
136 * Maybe we need a new page, maybe we have just run out
137 */
ca2a05aa 138 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 139 __be32 *p;
1da177e4
LT		 140 if (avail + argp->pagelen < nbytes)
141 return NULL;
142 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
143 return NULL;
144 /* ok, we can do it with the current plus the next page */
145 if (nbytes <= sizeof(argp->tmp))
146 p = argp->tmp;
147 else {
f99d49ad 148 kfree(argp->tmpp);
1da177e4
LT		 149 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
150 if (!p)
151 return NULL;
152
153 }
ca2a05aa
BF		 154 /*
155 * The following memcpy is safe because read_buf is always
156 * called with nbytes > avail, and the two cases above both
157 * guarantee p points to at least nbytes bytes.
158 */
1da177e4
LT		 159 memcpy(p, argp->p, avail);
160 /* step to next page */
161 argp->p = page_address(argp->pagelist[0]);
162 argp->pagelist++;
163 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 164 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 165 argp->pagelen = 0;
166 } else {
2bc3c117 167 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 168 argp->pagelen -= PAGE_SIZE;
169 }
170 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
171 argp->p += XDR_QUADLEN(nbytes - avail);
172 return p;
173}
174
60adfc50
AA		 175static int zero_clientid(clientid_t *clid)
176{
177 return (clid->cl_boot == 0) && (clid->cl_id == 0);
178}
179
1da177e4
LT		 180static int
181defer_free(struct nfsd4_compoundargs *argp,
182 void (*release)(const void *), void *p)
183{
184 struct tmpbuf *tb;
185
186 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
187 if (!tb)
188 return -ENOMEM;
189 tb->buf = p;
190 tb->release = release;
191 tb->next = argp->to_free;
192 argp->to_free = tb;
193 return 0;
194}
195
2ebbc012 196static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 197{
1da177e4 198 if (p == argp->tmp) {
a4db5fe5
BF		 199 p = kmalloc(nbytes, GFP_KERNEL);
200 if (!p)
201 return NULL;
1da177e4
LT		 202 memcpy(p, argp->tmp, nbytes);
203 } else {
73dff8be 204 BUG_ON(p != argp->tmpp);
1da177e4
LT		 205 argp->tmpp = NULL;
206 }
207 if (defer_free(argp, kfree, p)) {
a4db5fe5 208 kfree(p);
1da177e4
LT		 209 return NULL;
210 } else
211 return (char *)p;
212}
213
b37ad28b 214static __be32
1da177e4
LT		 215nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
216{
217 u32 bmlen;
218 DECODE_HEAD;
219
220 bmval[0] = 0;
221 bmval[1] = 0;
7e705706 222 bmval[2] = 0;
1da177e4
LT		 223
224 READ_BUF(4);
225 READ32(bmlen);
226 if (bmlen > 1000)
227 goto xdr_error;
228
229 READ_BUF(bmlen << 2);
230 if (bmlen > 0)
231 READ32(bmval[0]);
232 if (bmlen > 1)
233 READ32(bmval[1]);
7e705706
AA		 234 if (bmlen > 2)
235 READ32(bmval[2]);
1da177e4
LT		 236
237 DECODE_TAIL;
238}
239
b37ad28b 240static __be32
3c8e0316 241nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 242 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 243{
244 int expected_len, len = 0;
245 u32 dummy32;
246 char *buf;
b8dd7b9a 247 int host_err;
1da177e4
LT		 248
249 DECODE_HEAD;
250 iattr->ia_valid = 0;
251 if ((status = nfsd4_decode_bitmap(argp, bmval)))
252 return status;
253
1da177e4
LT		 254 READ_BUF(4);
255 READ32(expected_len);
256
257 if (bmval[0] & FATTR4_WORD0_SIZE) {
258 READ_BUF(8);
259 len += 8;
260 READ64(iattr->ia_size);
261 iattr->ia_valid |= ATTR_SIZE;
262 }
263 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 264 int nace;
265 struct nfs4_ace *ace;
1da177e4
LT		 266
267 READ_BUF(4); len += 4;
268 READ32(nace);
269
28e05dd8
BF		 270 if (nace > NFS4_ACL_MAX)
271 return nfserr_resource;
272
273 *acl = nfs4_acl_new(nace);
1da177e4 274 if (*acl == NULL) {
b8dd7b9a 275 host_err = -ENOMEM;
1da177e4
LT		 276 goto out_nfserr;
277 }
28e05dd8 278 defer_free(argp, kfree, *acl);
1da177e4 279
28e05dd8
BF		 280 (*acl)->naces = nace;
281 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 282 READ_BUF(16); len += 16;
28e05dd8
BF		 283 READ32(ace->type);
284 READ32(ace->flag);
285 READ32(ace->access_mask);
1da177e4
LT		 286 READ32(dummy32);
287 READ_BUF(dummy32);
288 len += XDR_QUADLEN(dummy32) << 2;
289 READMEM(buf, dummy32);
28e05dd8 290 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 291 host_err = 0;
28e05dd8
BF		 292 if (ace->whotype != NFS4_ACL_WHO_NAMED)
293 ace->who = 0;
294 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 295 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 296 buf, dummy32, &ace->who);
1da177e4 297 else
b8dd7b9a 298 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 299 buf, dummy32, &ace->who);
b8dd7b9a 300 if (host_err)
1da177e4 301 goto out_nfserr;
1da177e4
LT		 302 }
303 } else
304 *acl = NULL;
305 if (bmval[1] & FATTR4_WORD1_MODE) {
306 READ_BUF(4);
307 len += 4;
308 READ32(iattr->ia_mode);
309 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
310 iattr->ia_valid |= ATTR_MODE;
311 }
312 if (bmval[1] & FATTR4_WORD1_OWNER) {
313 READ_BUF(4);
314 len += 4;
315 READ32(dummy32);
316 READ_BUF(dummy32);
317 len += (XDR_QUADLEN(dummy32) << 2);
318 READMEM(buf, dummy32);
b8dd7b9a 319 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 320 goto out_nfserr;
321 iattr->ia_valid |= ATTR_UID;
322 }
323 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
324 READ_BUF(4);
325 len += 4;
326 READ32(dummy32);
327 READ_BUF(dummy32);
328 len += (XDR_QUADLEN(dummy32) << 2);
329 READMEM(buf, dummy32);
b8dd7b9a 330 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 331 goto out_nfserr;
332 iattr->ia_valid |= ATTR_GID;
333 }
334 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
335 READ_BUF(4);
336 len += 4;
337 READ32(dummy32);
338 switch (dummy32) {
339 case NFS4_SET_TO_CLIENT_TIME:
340 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
341 all 32 bits of 'nseconds'. */
342 READ_BUF(12);
343 len += 12;
344 READ32(dummy32);
345 if (dummy32)
346 return nfserr_inval;
347 READ32(iattr->ia_atime.tv_sec);
348 READ32(iattr->ia_atime.tv_nsec);
349 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
350 return nfserr_inval;
351 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
352 break;
353 case NFS4_SET_TO_SERVER_TIME:
354 iattr->ia_valid |= ATTR_ATIME;
355 break;
356 default:
357 goto xdr_error;
358 }
359 }
1da177e4
LT		 360 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
361 READ_BUF(4);
362 len += 4;
363 READ32(dummy32);
364 switch (dummy32) {
365 case NFS4_SET_TO_CLIENT_TIME:
366 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
367 all 32 bits of 'nseconds'. */
368 READ_BUF(12);
369 len += 12;
370 READ32(dummy32);
371 if (dummy32)
372 return nfserr_inval;
373 READ32(iattr->ia_mtime.tv_sec);
374 READ32(iattr->ia_mtime.tv_nsec);
375 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
376 return nfserr_inval;
377 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
378 break;
379 case NFS4_SET_TO_SERVER_TIME:
380 iattr->ia_valid |= ATTR_MTIME;
381 break;
382 default:
383 goto xdr_error;
384 }
385 }
3c8e0316
YZ		 386 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
387 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
388 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
389 READ_BUF(expected_len - len);
390 else if (len != expected_len)
1da177e4
LT		 391 goto xdr_error;
392
393 DECODE_TAIL;
394
395out_nfserr:
b8dd7b9a 396 status = nfserrno(host_err);
1da177e4
LT		 397 goto out;
398}
399
e31a1b66
BH		 400static __be32
401nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
402{
403 DECODE_HEAD;
404
405 READ_BUF(sizeof(stateid_t));
406 READ32(sid->si_generation);
407 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
408
409 DECODE_TAIL;
410}
411
b37ad28b 412static __be32
1da177e4
LT		 413nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
414{
415 DECODE_HEAD;
416
417 READ_BUF(4);
418 READ32(access->ac_req_access);
419
420 DECODE_TAIL;
421}
422
b37ad28b 423static __be32
1da177e4
LT		 424nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
425{
426 DECODE_HEAD;
427
428 close->cl_stateowner = NULL;
e31a1b66 429 READ_BUF(4);
1da177e4 430 READ32(close->cl_seqid);
e31a1b66 431 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 432
433 DECODE_TAIL;
434}
435
436
b37ad28b 437static __be32
1da177e4
LT		 438nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
439{
440 DECODE_HEAD;
441
442 READ_BUF(12);
443 READ64(commit->co_offset);
444 READ32(commit->co_count);
445
446 DECODE_TAIL;
447}
448
b37ad28b 449static __be32
1da177e4
LT		 450nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
451{
452 DECODE_HEAD;
453
454 READ_BUF(4);
455 READ32(create->cr_type);
456 switch (create->cr_type) {
457 case NF4LNK:
458 READ_BUF(4);
459 READ32(create->cr_linklen);
460 READ_BUF(create->cr_linklen);
461 SAVEMEM(create->cr_linkname, create->cr_linklen);
462 break;
463 case NF4BLK:
464 case NF4CHR:
465 READ_BUF(8);
466 READ32(create->cr_specdata1);
467 READ32(create->cr_specdata2);
468 break;
469 case NF4SOCK:
470 case NF4FIFO:
471 case NF4DIR:
472 default:
473 break;
474 }
475
476 READ_BUF(4);
477 READ32(create->cr_namelen);
478 READ_BUF(create->cr_namelen);
479 SAVEMEM(create->cr_name, create->cr_namelen);
480 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
481 return status;
482
3c8e0316
YZ		 483 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
484 &create->cr_acl);
c0d6fc8a 485 if (status)
1da177e4
LT		 486 goto out;
487
488 DECODE_TAIL;
489}
490
b37ad28b 491static inline __be32
1da177e4
LT		 492nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
493{
e31a1b66 494 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 495}
496
b37ad28b 497static inline __be32
1da177e4
LT		 498nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
499{
500 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
501}
502
b37ad28b 503static __be32
1da177e4
LT		 504nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
505{
506 DECODE_HEAD;
507
508 READ_BUF(4);
509 READ32(link->li_namelen);
510 READ_BUF(link->li_namelen);
511 SAVEMEM(link->li_name, link->li_namelen);
512 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
513 return status;
514
515 DECODE_TAIL;
516}
517
b37ad28b 518static __be32
1da177e4
LT		 519nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
520{
521 DECODE_HEAD;
522
3a65588a 523 lock->lk_replay_owner = NULL;
1da177e4
LT		 524 /*
525 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
526 */
527 READ_BUF(28);
528 READ32(lock->lk_type);
529 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
530 goto xdr_error;
531 READ32(lock->lk_reclaim);
532 READ64(lock->lk_offset);
533 READ64(lock->lk_length);
534 READ32(lock->lk_is_new);
535
536 if (lock->lk_is_new) {
e31a1b66 537 READ_BUF(4);
1da177e4 538 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 539 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
540 if (status)
541 return status;
542 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 543 READ32(lock->lk_new_lock_seqid);
544 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
545 READ32(lock->lk_new_owner.len);
546 READ_BUF(lock->lk_new_owner.len);
547 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
548 } else {
e31a1b66
BH		 549 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
550 if (status)
551 return status;
552 READ_BUF(4);
1da177e4
LT		 553 READ32(lock->lk_old_lock_seqid);
554 }
555
556 DECODE_TAIL;
557}
558
b37ad28b 559static __be32
1da177e4
LT		 560nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
561{
562 DECODE_HEAD;
563
564 READ_BUF(32);
565 READ32(lockt->lt_type);
566 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
567 goto xdr_error;
568 READ64(lockt->lt_offset);
569 READ64(lockt->lt_length);
570 COPYMEM(&lockt->lt_clientid, 8);
571 READ32(lockt->lt_owner.len);
572 READ_BUF(lockt->lt_owner.len);
573 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
574
60adfc50
AA		 575 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
576 return nfserr_inval;
1da177e4
LT		 577 DECODE_TAIL;
578}
579
b37ad28b 580static __be32
1da177e4
LT		 581nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
582{
583 DECODE_HEAD;
584
585 locku->lu_stateowner = NULL;
e31a1b66 586 READ_BUF(8);
1da177e4
LT		 587 READ32(locku->lu_type);
588 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
589 goto xdr_error;
590 READ32(locku->lu_seqid);
e31a1b66
BH		 591 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
592 if (status)
593 return status;
594 READ_BUF(16);
1da177e4
LT		 595 READ64(locku->lu_offset);
596 READ64(locku->lu_length);
597
598 DECODE_TAIL;
599}
600
b37ad28b 601static __be32
1da177e4
LT		 602nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
603{
604 DECODE_HEAD;
605
606 READ_BUF(4);
607 READ32(lookup->lo_len);
608 READ_BUF(lookup->lo_len);
609 SAVEMEM(lookup->lo_name, lookup->lo_len);
610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
611 return status;
612
613 DECODE_TAIL;
614}
615
b37ad28b 616static __be32
1da177e4
LT		 617nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
618{
619 DECODE_HEAD;
620
621 memset(open->op_bmval, 0, sizeof(open->op_bmval));
622 open->op_iattr.ia_valid = 0;
623 open->op_stateowner = NULL;
624
625 /* seqid, share_access, share_deny, clientid, ownerlen */
626 READ_BUF(16 + sizeof(clientid_t));
627 READ32(open->op_seqid);
628 READ32(open->op_share_access);
629 READ32(open->op_share_deny);
630 COPYMEM(&open->op_clientid, sizeof(clientid_t));
631 READ32(open->op_owner.len);
632
633 /* owner, open_flag */
634 READ_BUF(open->op_owner.len + 4);
635 SAVEMEM(open->op_owner.data, open->op_owner.len);
636 READ32(open->op_create);
637 switch (open->op_create) {
638 case NFS4_OPEN_NOCREATE:
639 break;
640 case NFS4_OPEN_CREATE:
641 READ_BUF(4);
642 READ32(open->op_createmode);
643 switch (open->op_createmode) {
644 case NFS4_CREATE_UNCHECKED:
645 case NFS4_CREATE_GUARDED:
c0d6fc8a 646 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 647 &open->op_iattr, &open->op_acl);
c0d6fc8a 648 if (status)
1da177e4
LT		 649 goto out;
650 break;
651 case NFS4_CREATE_EXCLUSIVE:
652 READ_BUF(8);
653 COPYMEM(open->op_verf.data, 8);
654 break;
79fb54ab
BH		 655 case NFS4_CREATE_EXCLUSIVE4_1:
656 if (argp->minorversion < 1)
657 goto xdr_error;
658 READ_BUF(8);
659 COPYMEM(open->op_verf.data, 8);
660 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 661 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 662 if (status)
663 goto out;
664 break;
1da177e4
LT		 665 default:
666 goto xdr_error;
667 }
668 break;
669 default:
670 goto xdr_error;
671 }
672
673 /* open_claim */
674 READ_BUF(4);
675 READ32(open->op_claim_type);
676 switch (open->op_claim_type) {
677 case NFS4_OPEN_CLAIM_NULL:
678 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
679 READ_BUF(4);
680 READ32(open->op_fname.len);
681 READ_BUF(open->op_fname.len);
682 SAVEMEM(open->op_fname.data, open->op_fname.len);
683 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
684 return status;
685 break;
686 case NFS4_OPEN_CLAIM_PREVIOUS:
687 READ_BUF(4);
688 READ32(open->op_delegate_type);
689 break;
690 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 691 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
692 if (status)
693 return status;
694 READ_BUF(4);
1da177e4
LT		 695 READ32(open->op_fname.len);
696 READ_BUF(open->op_fname.len);
697 SAVEMEM(open->op_fname.data, open->op_fname.len);
698 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
699 return status;
700 break;
701 default:
702 goto xdr_error;
703 }
704
705 DECODE_TAIL;
706}
707
b37ad28b 708static __be32
1da177e4
LT		 709nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
710{
711 DECODE_HEAD;
712
713 open_conf->oc_stateowner = NULL;
e31a1b66
BH		 714 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
715 if (status)
716 return status;
717 READ_BUF(4);
1da177e4
LT		 718 READ32(open_conf->oc_seqid);
719
720 DECODE_TAIL;
721}
722
b37ad28b 723static __be32
1da177e4
LT		 724nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
725{
726 DECODE_HEAD;
727
728 open_down->od_stateowner = NULL;
e31a1b66
BH		 729 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
730 if (status)
731 return status;
732 READ_BUF(12);
1da177e4
LT		 733 READ32(open_down->od_seqid);
734 READ32(open_down->od_share_access);
735 READ32(open_down->od_share_deny);
736
737 DECODE_TAIL;
738}
739
b37ad28b 740static __be32
1da177e4
LT		 741nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
742{
743 DECODE_HEAD;
744
745 READ_BUF(4);
746 READ32(putfh->pf_fhlen);
747 if (putfh->pf_fhlen > NFS4_FHSIZE)
748 goto xdr_error;
749 READ_BUF(putfh->pf_fhlen);
750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
751
752 DECODE_TAIL;
753}
754
b37ad28b 755static __be32
1da177e4
LT		 756nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
757{
758 DECODE_HEAD;
759
e31a1b66
BH		 760 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
761 if (status)
762 return status;
763 READ_BUF(12);
1da177e4
LT		 764 READ64(read->rd_offset);
765 READ32(read->rd_length);
766
767 DECODE_TAIL;
768}
769
b37ad28b 770static __be32
1da177e4
LT		 771nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
772{
773 DECODE_HEAD;
774
775 READ_BUF(24);
776 READ64(readdir->rd_cookie);
777 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
778 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
779 READ32(readdir->rd_maxcount);
780 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
781 goto out;
782
783 DECODE_TAIL;
784}
785
b37ad28b 786static __be32
1da177e4
LT		 787nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
788{
789 DECODE_HEAD;
790
791 READ_BUF(4);
792 READ32(remove->rm_namelen);
793 READ_BUF(remove->rm_namelen);
794 SAVEMEM(remove->rm_name, remove->rm_namelen);
795 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
796 return status;
797
798 DECODE_TAIL;
799}
800
b37ad28b 801static __be32
1da177e4
LT		 802nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
803{
804 DECODE_HEAD;
805
806 READ_BUF(4);
807 READ32(rename->rn_snamelen);
808 READ_BUF(rename->rn_snamelen + 4);
809 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
810 READ32(rename->rn_tnamelen);
811 READ_BUF(rename->rn_tnamelen);
812 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
813 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
814 return status;
815 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
816 return status;
817
818 DECODE_TAIL;
819}
820
b37ad28b 821static __be32
1da177e4
LT		 822nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
823{
824 DECODE_HEAD;
825
826 READ_BUF(sizeof(clientid_t));
827 COPYMEM(clientid, sizeof(clientid_t));
828
829 DECODE_TAIL;
830}
831
dcb488a3
AA		 832static __be32
833nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
834 struct nfsd4_secinfo *secinfo)
835{
836 DECODE_HEAD;
837
838 READ_BUF(4);
839 READ32(secinfo->si_namelen);
840 READ_BUF(secinfo->si_namelen);
841 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
842 status = check_filename(secinfo->si_name, secinfo->si_namelen,
843 nfserr_noent);
844 if (status)
845 return status;
846 DECODE_TAIL;
847}
848
04f4ad16
BF		 849static __be32
850nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
851 struct nfsd4_secinfo_no_name *sin)
852{
853 DECODE_HEAD;
854
855 READ_BUF(4);
856 READ32(sin->sin_style);
857 DECODE_TAIL;
858}
859
b37ad28b 860static __be32
1da177e4
LT		 861nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
862{
e31a1b66 863 __be32 status;
1da177e4 864
e31a1b66
BH		 865 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
866 if (status)
867 return status;
3c8e0316
YZ		 868 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
869 &setattr->sa_acl);
1da177e4
LT		 870}
871
b37ad28b 872static __be32
1da177e4
LT		 873nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
874{
875 DECODE_HEAD;
876
877 READ_BUF(12);
878 COPYMEM(setclientid->se_verf.data, 8);
879 READ32(setclientid->se_namelen);
880
881 READ_BUF(setclientid->se_namelen + 8);
882 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
883 READ32(setclientid->se_callback_prog);
884 READ32(setclientid->se_callback_netid_len);
885
886 READ_BUF(setclientid->se_callback_netid_len + 4);
887 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
888 READ32(setclientid->se_callback_addr_len);
889
890 READ_BUF(setclientid->se_callback_addr_len + 4);
891 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
892 READ32(setclientid->se_callback_ident);
893
894 DECODE_TAIL;
895}
896
b37ad28b 897static __be32
1da177e4
LT		 898nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
899{
900 DECODE_HEAD;
901
902 READ_BUF(8 + sizeof(nfs4_verifier));
903 COPYMEM(&scd_c->sc_clientid, 8);
904 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
905
906 DECODE_TAIL;
907}
908
909/* Also used for NVERIFY */
b37ad28b 910static __be32
1da177e4
LT		 911nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
912{
913#if 0
914 struct nfsd4_compoundargs save = {
915 .p = argp->p,
916 .end = argp->end,
917 .rqstp = argp->rqstp,
918 };
919 u32 ve_bmval[2];
920 struct iattr ve_iattr; /* request */
921 struct nfs4_acl *ve_acl; /* request */
922#endif
923 DECODE_HEAD;
924
925 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
926 goto out;
927
928 /* For convenience's sake, we compare raw xdr'd attributes in
929 * nfsd4_proc_verify; however we still decode here just to return
930 * correct error in case of bad xdr. */
931#if 0
932 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
933 if (status == nfserr_inval) {
934 status = nfserrno(status);
935 goto out;
936 }
937#endif
938 READ_BUF(4);
939 READ32(verify->ve_attrlen);
940 READ_BUF(verify->ve_attrlen);
941 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
942
943 DECODE_TAIL;
944}
945
b37ad28b 946static __be32
1da177e4
LT		 947nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
948{
949 int avail;
950 int v;
951 int len;
952 DECODE_HEAD;
953
e31a1b66
BH		 954 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
955 if (status)
956 return status;
957 READ_BUF(16);
1da177e4
LT		 958 READ64(write->wr_offset);
959 READ32(write->wr_stable_how);
960 if (write->wr_stable_how > 2)
961 goto xdr_error;
962 READ32(write->wr_buflen);
963
964 /* Sorry .. no magic macros for this.. *
965 * READ_BUF(write->wr_buflen);
966 * SAVEMEM(write->wr_buf, write->wr_buflen);
967 */
968 avail = (char*)argp->end - (char*)argp->p;
969 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 970 dprintk("NFSD: xdr error (%s:%d)\n",
971 __FILE__, __LINE__);
1da177e4
LT		 972 goto xdr_error;
973 }
3cc03b16
N		 974 argp->rqstp->rq_vec[0].iov_base = p;
975 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 976 v = 0;
977 len = write->wr_buflen;
3cc03b16
N		 978 while (len > argp->rqstp->rq_vec[v].iov_len) {
979 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 980 v++;
3cc03b16 981 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 982 argp->pagelist++;
983 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 984 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 985 argp->pagelen -= PAGE_SIZE;
986 } else {
3cc03b16 987 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 988 argp->pagelen -= len;
989 }
990 }
2ebbc012
AV		 991 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
992 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 993 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 994 write->wr_vlen = v+1;
995
996 DECODE_TAIL;
997}
998
b37ad28b 999static __be32
1da177e4
LT		 1000nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1001{
1002 DECODE_HEAD;
1003
1004 READ_BUF(12);
1005 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1006 READ32(rlockowner->rl_owner.len);
1007 READ_BUF(rlockowner->rl_owner.len);
1008 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1009
60adfc50
AA		 1010 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1011 return nfserr_inval;
1da177e4
LT		 1012 DECODE_TAIL;
1013}
1014
2db134eb
AA		 1015static __be32
1016nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1017 struct nfsd4_exchange_id *exid)
2db134eb 1018{
5afa040b 1019 int dummy, tmp;
0733d213
AA		 1020 DECODE_HEAD;
1021
1022 READ_BUF(NFS4_VERIFIER_SIZE);
1023 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1024
1025 READ_BUF(4);
1026 READ32(exid->clname.len);
1027
1028 READ_BUF(exid->clname.len);
1029 SAVEMEM(exid->clname.data, exid->clname.len);
1030
1031 READ_BUF(4);
1032 READ32(exid->flags);
1033
1034 /* Ignore state_protect4_a */
1035 READ_BUF(4);
1036 READ32(exid->spa_how);
1037 switch (exid->spa_how) {
1038 case SP4_NONE:
1039 break;
1040 case SP4_MACH_CRED:
1041 /* spo_must_enforce */
1042 READ_BUF(4);
1043 READ32(dummy);
1044 READ_BUF(dummy * 4);
1045 p += dummy;
1046
1047 /* spo_must_allow */
1048 READ_BUF(4);
1049 READ32(dummy);
1050 READ_BUF(dummy * 4);
1051 p += dummy;
1052 break;
1053 case SP4_SSV:
1054 /* ssp_ops */
1055 READ_BUF(4);
1056 READ32(dummy);
1057 READ_BUF(dummy * 4);
1058 p += dummy;
1059
1060 READ_BUF(4);
1061 READ32(dummy);
1062 READ_BUF(dummy * 4);
1063 p += dummy;
1064
1065 /* ssp_hash_algs<> */
1066 READ_BUF(4);
5afa040b
MJ		 1067 READ32(tmp);
1068 while (tmp--) {
1069 READ_BUF(4);
1070 READ32(dummy);
1071 READ_BUF(dummy);
1072 p += XDR_QUADLEN(dummy);
1073 }
0733d213
AA		 1074
1075 /* ssp_encr_algs<> */
1076 READ_BUF(4);
5afa040b
MJ		 1077 READ32(tmp);
1078 while (tmp--) {
1079 READ_BUF(4);
1080 READ32(dummy);
1081 READ_BUF(dummy);
1082 p += XDR_QUADLEN(dummy);
1083 }
0733d213
AA		 1084
1085 /* ssp_window and ssp_num_gss_handles */
1086 READ_BUF(8);
1087 READ32(dummy);
1088 READ32(dummy);
1089 break;
1090 default:
1091 goto xdr_error;
1092 }
1093
1094 /* Ignore Implementation ID */
1095 READ_BUF(4); /* nfs_impl_id4 array length */
1096 READ32(dummy);
1097
1098 if (dummy > 1)
1099 goto xdr_error;
1100
1101 if (dummy == 1) {
1102 /* nii_domain */
1103 READ_BUF(4);
1104 READ32(dummy);
1105 READ_BUF(dummy);
1106 p += XDR_QUADLEN(dummy);
1107
1108 /* nii_name */
1109 READ_BUF(4);
1110 READ32(dummy);
1111 READ_BUF(dummy);
1112 p += XDR_QUADLEN(dummy);
1113
1114 /* nii_date */
1115 READ_BUF(12);
1116 p += 3;
1117 }
1118 DECODE_TAIL;
2db134eb
AA		 1119}
1120
1121static __be32
1122nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1123 struct nfsd4_create_session *sess)
1124{
ec6b5d7b
AA		 1125 DECODE_HEAD;
1126
1127 u32 dummy;
1128 char *machine_name;
1129 int i;
1130 int nr_secflavs;
1131
1132 READ_BUF(16);
1133 COPYMEM(&sess->clientid, 8);
1134 READ32(sess->seqid);
1135 READ32(sess->flags);
1136
1137 /* Fore channel attrs */
1138 READ_BUF(28);
1139 READ32(dummy); /* headerpadsz is always 0 */
1140 READ32(sess->fore_channel.maxreq_sz);
1141 READ32(sess->fore_channel.maxresp_sz);
1142 READ32(sess->fore_channel.maxresp_cached);
1143 READ32(sess->fore_channel.maxops);
1144 READ32(sess->fore_channel.maxreqs);
1145 READ32(sess->fore_channel.nr_rdma_attrs);
1146 if (sess->fore_channel.nr_rdma_attrs == 1) {
1147 READ_BUF(4);
1148 READ32(sess->fore_channel.rdma_attrs);
1149 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1150 dprintk("Too many fore channel attr bitmaps!\n");
1151 goto xdr_error;
1152 }
1153
1154 /* Back channel attrs */
1155 READ_BUF(28);
1156 READ32(dummy); /* headerpadsz is always 0 */
1157 READ32(sess->back_channel.maxreq_sz);
1158 READ32(sess->back_channel.maxresp_sz);
1159 READ32(sess->back_channel.maxresp_cached);
1160 READ32(sess->back_channel.maxops);
1161 READ32(sess->back_channel.maxreqs);
1162 READ32(sess->back_channel.nr_rdma_attrs);
1163 if (sess->back_channel.nr_rdma_attrs == 1) {
1164 READ_BUF(4);
1165 READ32(sess->back_channel.rdma_attrs);
1166 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1167 dprintk("Too many back channel attr bitmaps!\n");
1168 goto xdr_error;
1169 }
1170
1171 READ_BUF(8);
1172 READ32(sess->callback_prog);
1173
1174 /* callback_sec_params4 */
1175 READ32(nr_secflavs);
1176 for (i = 0; i < nr_secflavs; ++i) {
1177 READ_BUF(4);
1178 READ32(dummy);
1179 switch (dummy) {
1180 case RPC_AUTH_NULL:
1181 /* Nothing to read */
1182 break;
1183 case RPC_AUTH_UNIX:
1184 READ_BUF(8);
1185 /* stamp */
1186 READ32(dummy);
1187
1188 /* machine name */
1189 READ32(dummy);
1190 READ_BUF(dummy);
1191 SAVEMEM(machine_name, dummy);
1192
1193 /* uid, gid */
1194 READ_BUF(8);
1195 READ32(sess->uid);
1196 READ32(sess->gid);
1197
1198 /* more gids */
1199 READ_BUF(4);
1200 READ32(dummy);
1201 READ_BUF(dummy * 4);
1202 for (i = 0; i < dummy; ++i)
1203 READ32(dummy);
1204 break;
1205 case RPC_AUTH_GSS:
1206 dprintk("RPC_AUTH_GSS callback secflavor "
1207 "not supported!\n");
1208 READ_BUF(8);
1209 /* gcbp_service */
1210 READ32(dummy);
1211 /* gcbp_handle_from_server */
1212 READ32(dummy);
1213 READ_BUF(dummy);
1214 p += XDR_QUADLEN(dummy);
1215 /* gcbp_handle_from_client */
1216 READ_BUF(4);
1217 READ32(dummy);
1218 READ_BUF(dummy);
1219 p += XDR_QUADLEN(dummy);
1220 break;
1221 default:
1222 dprintk("Illegal callback secflavor\n");
1223 return nfserr_inval;
1224 }
1225 }
1226 DECODE_TAIL;
2db134eb
AA		 1227}
1228
1229static __be32
1230nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1231 struct nfsd4_destroy_session *destroy_session)
1232{
e10e0cfc
BH		 1233 DECODE_HEAD;
1234 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1235 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1236
1237 DECODE_TAIL;
2db134eb
AA		 1238}
1239
1240static __be32
1241nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1242 struct nfsd4_sequence *seq)
1243{
b85d4c01
BH		 1244 DECODE_HEAD;
1245
1246 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1247 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1248 READ32(seq->seqid);
1249 READ32(seq->slotid);
1250 READ32(seq->maxslots);
1251 READ32(seq->cachethis);
1252
1253 DECODE_TAIL;
2db134eb
AA		 1254}
1255
4dc6ec00
BF		 1256static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1257{
1258 DECODE_HEAD;
1259
1260 READ_BUF(4);
1261 READ32(rc->rca_one_fs);
1262
1263 DECODE_TAIL;
1264}
1265
347e0ad9
BH		 1266static __be32
1267nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1268{
1269 return nfs_ok;
1270}
1271
3c375c6f
BH		 1272static __be32
1273nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1274{
1e685ec2 1275 return nfserr_notsupp;
3c375c6f
BH		 1276}
1277
347e0ad9
BH		 1278typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1279
1280static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1281 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1282 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1283 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1284 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1285 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1286 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1287 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1288 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1289 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1290 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1291 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1292 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1293 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1294 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1295 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1296 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1297 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1298 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1299 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1300 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1301 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1302 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1303 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1304 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1305 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1306 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1307 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1308 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1309 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1312 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1313 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1314 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1315 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1316 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1317 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1318};
1319
2db134eb 1320static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1321 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1322 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1323 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1324 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1325 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1326 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1327 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1328 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1329 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1330 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1331 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1332 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1333 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1334 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1335 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1336 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1337 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1340 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1341 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1343 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1344 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1345 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1346 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1347 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1348 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1350 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1351 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1352 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1353 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1356 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1357 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1358
1359 /* new operations for NFSv4.1 */
9064caae
RD		 1360 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1361 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1363 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1364 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1365 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1366 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1367 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1368 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1369 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1370 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1372 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1373 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1374 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1375 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
4dc6ec00 1378 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1379};
1380
f2feb96b
BH		 1381struct nfsd4_minorversion_ops {
1382 nfsd4_dec *decoders;
1383 int nops;
1384};
1385
1386static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1387 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1388 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1389};
1390
b37ad28b 1391static __be32
1da177e4
LT		 1392nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1393{
1394 DECODE_HEAD;
1395 struct nfsd4_op *op;
f2feb96b 1396 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1397 int i;
1398
1399 /*
1400 * XXX: According to spec, we should check the tag
1401 * for UTF-8 compliance. I'm postponing this for
1402 * now because it seems that some clients do use
1403 * binary tags.
1404 */
1405 READ_BUF(4);
1406 READ32(argp->taglen);
1407 READ_BUF(argp->taglen + 8);
1408 SAVEMEM(argp->tag, argp->taglen);
1409 READ32(argp->minorversion);
1410 READ32(argp->opcnt);
1411
1412 if (argp->taglen > NFSD4_MAX_TAGLEN)
1413 goto xdr_error;
1414 if (argp->opcnt > 100)
1415 goto xdr_error;
1416
e8c96f8c 1417 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1418 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1419 if (!argp->ops) {
1420 argp->ops = argp->iops;
817cb9d4 1421 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1422 goto xdr_error;
1423 }
1424 }
1425
f2feb96b 1426 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1427 argp->opcnt = 0;
1428
f2feb96b 1429 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1430 for (i = 0; i < argp->opcnt; i++) {
1431 op = &argp->ops[i];
1432 op->replay = NULL;
1433
1434 /*
1435 * We can't use READ_BUF() here because we need to handle
1436 * a missing opcode as an OP_WRITE + 1. So we need to check
1437 * to see if we're truly at the end of our buffer or if there
1438 * is another page we need to flip to.
1439 */
1440
1441 if (argp->p == argp->end) {
1442 if (argp->pagelen < 4) {
1443 /* There isn't an opcode still on the wire */
1444 op->opnum = OP_WRITE + 1;
1445 op->status = nfserr_bad_xdr;
1446 argp->opcnt = i+1;
1447 break;
1448 }
1449
1450 /*
1451 * False alarm. We just hit a page boundary, but there
1452 * is still data available. Move pointer across page
1453 * boundary. *snip from READ_BUF*
1454 */
1455 argp->p = page_address(argp->pagelist[0]);
1456 argp->pagelist++;
1457 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 1458 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 1459 argp->pagelen = 0;
1460 } else {
2bc3c117 1461 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 1462 argp->pagelen -= PAGE_SIZE;
1463 }
1464 }
1465 op->opnum = ntohl(*argp->p++);
1466
de3cab79 1467 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1468 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1469 else {
1da177e4
LT		 1470 op->opnum = OP_ILLEGAL;
1471 op->status = nfserr_op_illegal;
1da177e4
LT		 1472 }
1473
1474 if (op->status) {
1475 argp->opcnt = i+1;
1476 break;
1477 }
1478 }
1479
1480 DECODE_TAIL;
1481}
1da177e4 1482
1da177e4
LT		 1483#define WRITE32(n) *p++ = htonl(n)
1484#define WRITE64(n) do { \
1485 *p++ = htonl((u32)((n) >> 32)); \
1486 *p++ = htonl((u32)(n)); \
1487} while (0)
5108b276 1488#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1489 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1490 memcpy(p, ptr, nbytes); \
1491 p += XDR_QUADLEN(nbytes); \
5108b276 1492}} while (0)
c654b8a9
BF		 1493
1494static void write32(__be32 **p, u32 n)
1495{
1496 *(*p)++ = n;
1497}
1498
1499static void write64(__be32 **p, u64 n)
1500{
1501 write32(p, (u32)(n >> 32));
1502 write32(p, (u32)n);
1503}
1504
1505static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1506{
1507 if (IS_I_VERSION(inode)) {
1508 write64(p, inode->i_version);
1509 } else {
1510 write32(p, stat->ctime.tv_sec);
1511 write32(p, stat->ctime.tv_nsec);
1512 }
1513}
1514
1515static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1516{
1517 write32(p, c->atomic);
1518 if (c->change_supported) {
1519 write64(p, c->before_change);
1520 write64(p, c->after_change);
1521 } else {
1522 write32(p, c->before_ctime_sec);
1523 write32(p, c->before_ctime_nsec);
1524 write32(p, c->after_ctime_sec);
1525 write32(p, c->after_ctime_nsec);
1526 }
1527}
1da177e4
LT		 1528
1529#define RESERVE_SPACE(nbytes) do { \
1530 p = resp->p; \
1531 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1532} while (0)
1533#define ADJUST_ARGS() resp->p = p
1534
1535/*
1536 * Header routine to setup seqid operation replay cache
1537 */
1538#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1539 __be32 *save; \
1da177e4
LT		 1540 \
1541 save = resp->p;
1542
1543/*
7fb64cee
N		 1544 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1545 * is where sequence id's are incremented, and the replay cache is filled.
1546 * Note that we increment sequence id's here, at the last moment, so we're sure
1547 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1548 */
1549
1550#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1551 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1552 stateowner->so_seqid++; \
1da177e4
LT		 1553 stateowner->so_replay.rp_status = nfserr; \
1554 stateowner->so_replay.rp_buflen = \
1555 (((char *)(resp)->p - (char *)save)); \
1556 memcpy(stateowner->so_replay.rp_buf, save, \
1557 stateowner->so_replay.rp_buflen); \
1558 } } while (0);
1559
81c3f413 1560/* Encode as an array of strings the string given with components
3ad2f3fb 1561 * separated @sep.
81c3f413 1562 */
b37ad28b 1563static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1564 __be32 **pp, int *buflen)
81c3f413 1565{
2ebbc012
AV		 1566 __be32 *p = *pp;
1567 __be32 *countp = p;
81c3f413
BF		 1568 int strlen, count=0;
1569 char *str, *end;
1570
1571 dprintk("nfsd4_encode_components(%s)\n", components);
1572 if ((*buflen -= 4) < 0)
1573 return nfserr_resource;
1574 WRITE32(0); /* We will fill this in with @count later */
1575 end = str = components;
1576 while (*end) {
1577 for (; *end && (*end != sep); end++)
1578 ; /* Point to end of component */
1579 strlen = end - str;
1580 if (strlen) {
1581 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1582 return nfserr_resource;
1583 WRITE32(strlen);
1584 WRITEMEM(str, strlen);
1585 count++;
1586 }
1587 else
1588 end++;
1589 str = end;
1590 }
1591 *pp = p;
1592 p = countp;
1593 WRITE32(count);
1594 return 0;
1595}
1596
1597/*
1598 * encode a location element of a fs_locations structure
1599 */
b37ad28b 1600static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1601 __be32 **pp, int *buflen)
81c3f413 1602{
b37ad28b 1603 __be32 status;
2ebbc012 1604 __be32 *p = *pp;
81c3f413
BF		 1605
1606 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1607 if (status)
1608 return status;
1609 status = nfsd4_encode_components('/', location->path, &p, buflen);
1610 if (status)
1611 return status;
1612 *pp = p;
1613 return 0;
1614}
1615
1616/*
1617 * Return the path to an export point in the pseudo filesystem namespace
1618 * Returned string is safe to use as long as the caller holds a reference
1619 * to @exp.
1620 */
b37ad28b 1621static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1622{
1623 struct svc_fh tmp_fh;
2671a4bf
TM		 1624 char *path = NULL, *rootpath;
1625 size_t rootlen;
81c3f413
BF		 1626
1627 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1628 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1629 if (*stat)
1630 return NULL;
54775491 1631 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1632
54775491 1633 path = exp->ex_pathname;
81c3f413 1634
2671a4bf
TM		 1635 rootlen = strlen(rootpath);
1636 if (strncmp(path, rootpath, rootlen)) {
817cb9d4 1637 dprintk("nfsd: fs_locations failed;"
81c3f413 1638 "%s is not contained in %s\n", path, rootpath);
cc45f017 1639 *stat = nfserr_notsupp;
2671a4bf
TM		 1640 path = NULL;
1641 goto out;
81c3f413 1642 }
2671a4bf
TM		 1643 path += rootlen;
1644out:
1645 fh_put(&tmp_fh);
1646 return path;
81c3f413
BF		 1647}
1648
1649/*
1650 * encode a fs_locations structure
1651 */
b37ad28b 1652static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1653 struct svc_export *exp,
2ebbc012 1654 __be32 **pp, int *buflen)
81c3f413 1655{
b37ad28b 1656 __be32 status;
cc45f017 1657 int i;
2ebbc012 1658 __be32 *p = *pp;
81c3f413 1659 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1660 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1661
cc45f017
AV		 1662 if (status)
1663 return status;
81c3f413
BF		 1664 status = nfsd4_encode_components('/', root, &p, buflen);
1665 if (status)
1666 return status;
1667 if ((*buflen -= 4) < 0)
1668 return nfserr_resource;
1669 WRITE32(fslocs->locations_count);
1670 for (i=0; i<fslocs->locations_count; i++) {
1671 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1672 &p, buflen);
1673 if (status)
1674 return status;
1675 }
1676 *pp = p;
1677 return 0;
1678}
1da177e4
LT		 1679
1680static u32 nfs4_ftypes[16] = {
1681 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1682 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1683 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1684 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1685};
1686
b37ad28b 1687static __be32
1da177e4 1688nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1689 __be32 **p, int *buflen)
1da177e4
LT		 1690{
1691 int status;
1692
1693 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1694 return nfserr_resource;
1695 if (whotype != NFS4_ACL_WHO_NAMED)
1696 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1697 else if (group)
1698 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1699 else
1700 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1701 if (status < 0)
1702 return nfserrno(status);
1703 *p = xdr_encode_opaque(*p, NULL, status);
1704 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1705 BUG_ON(*buflen < 0);
1706 return 0;
1707}
1708
b37ad28b 1709static inline __be32
2ebbc012 1710nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1711{
1712 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1713}
1714
b37ad28b 1715static inline __be32
2ebbc012 1716nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1717{
1718 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1719}
1720
b37ad28b 1721static inline __be32
1da177e4 1722nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1723 __be32 **p, int *buflen)
1da177e4
LT		 1724{
1725 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1726}
1727
42ca0993
BF		 1728#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1729 FATTR4_WORD0_RDATTR_ERROR)
1730#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1731
b37ad28b 1732static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1733{
1734 /* As per referral draft: */
1735 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1736 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1737 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1738 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1739 *rdattr_err = NFSERR_MOVED;
1740 else
1741 return nfserr_moved;
1742 }
1743 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1744 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1745 return 0;
1746}
1da177e4
LT		 1747
1748/*
1749 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1750 * ourselves.
1751 *
1752 * @countp is the buffer size in _words_; upon successful return this becomes
1753 * replaced with the number of words written.
1754 */
b37ad28b 1755__be32
1da177e4 1756nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1757 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1758 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1759{
1760 u32 bmval0 = bmval[0];
1761 u32 bmval1 = bmval[1];
7e705706 1762 u32 bmval2 = bmval[2];
1da177e4
LT		 1763 struct kstat stat;
1764 struct svc_fh tempfh;
1765 struct kstatfs statfs;
1766 int buflen = *countp << 2;
2ebbc012 1767 __be32 *attrlenp;
1da177e4
LT		 1768 u32 dummy;
1769 u64 dummy64;
42ca0993 1770 u32 rdattr_err = 0;
2ebbc012 1771 __be32 *p = buffer;
b37ad28b 1772 __be32 status;
b8dd7b9a 1773 int err;
1da177e4
LT		 1774 int aclsupport = 0;
1775 struct nfs4_acl *acl = NULL;
7e705706
AA		 1776 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1777 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 1778 struct path path = {
1779 .mnt = exp->ex_path.mnt,
1780 .dentry = dentry,
1781 };
1da177e4
LT		 1782
1783 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 1784 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1785 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1786 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 1787
42ca0993 1788 if (exp->ex_fslocs.migrated) {
7e705706 1789 BUG_ON(bmval[2]);
42ca0993
BF		 1790 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1791 if (status)
1792 goto out;
1793 }
1794
54775491 1795 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1796 if (err)
1da177e4 1797 goto out_nfserr;
a16e92ed
BF		 1798 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1799 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1800 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1801 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 1802 err = vfs_statfs(&path, &statfs);
b8dd7b9a 1803 if (err)
1da177e4
LT		 1804 goto out_nfserr;
1805 }
1806 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1807 fh_init(&tempfh, NFS4_FHSIZE);
1808 status = fh_compose(&tempfh, exp, dentry, NULL);
1809 if (status)
1810 goto out;
1811 fhp = &tempfh;
1812 }
1813 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1814 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1815 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1816 aclsupport = (err == 0);
1da177e4 1817 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1818 if (err == -EOPNOTSUPP)
1da177e4 1819 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1820 else if (err == -EINVAL) {
1da177e4
LT		 1821 status = nfserr_attrnotsupp;
1822 goto out;
b8dd7b9a 1823 } else if (err != 0)
1da177e4
LT		 1824 goto out_nfserr;
1825 }
1826 }
1da177e4 1827
2b44f1ba
BH		 1828 if (bmval2) {
1829 if ((buflen -= 16) < 0)
1830 goto out_resource;
7e705706
AA		 1831 WRITE32(3);
1832 WRITE32(bmval0);
1833 WRITE32(bmval1);
1834 WRITE32(bmval2);
2b44f1ba
BH		 1835 } else if (bmval1) {
1836 if ((buflen -= 12) < 0)
1837 goto out_resource;
7e705706
AA		 1838 WRITE32(2);
1839 WRITE32(bmval0);
1840 WRITE32(bmval1);
1841 } else {
2b44f1ba
BH		 1842 if ((buflen -= 8) < 0)
1843 goto out_resource;
7e705706
AA		 1844 WRITE32(1);
1845 WRITE32(bmval0);
1846 }
1da177e4
LT		 1847 attrlenp = p++; /* to be backfilled later */
1848
1849 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 1850 u32 word0 = nfsd_suppattrs0(minorversion);
1851 u32 word1 = nfsd_suppattrs1(minorversion);
1852 u32 word2 = nfsd_suppattrs2(minorversion);
1853
42ca0993
BF		 1854 if (!aclsupport)
1855 word0 &= ~FATTR4_WORD0_ACL;
7e705706 1856 if (!word2) {
2b44f1ba
BH		 1857 if ((buflen -= 12) < 0)
1858 goto out_resource;
7e705706
AA		 1859 WRITE32(2);
1860 WRITE32(word0);
1861 WRITE32(word1);
1862 } else {
2b44f1ba
BH		 1863 if ((buflen -= 16) < 0)
1864 goto out_resource;
7e705706
AA		 1865 WRITE32(3);
1866 WRITE32(word0);
1867 WRITE32(word1);
1868 WRITE32(word2);
1869 }
1da177e4
LT		 1870 }
1871 if (bmval0 & FATTR4_WORD0_TYPE) {
1872 if ((buflen -= 4) < 0)
1873 goto out_resource;
1874 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1875 if (dummy == NF4BAD)
1876 goto out_serverfault;
1877 WRITE32(dummy);
1878 }
1879 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1880 if ((buflen -= 4) < 0)
1881 goto out_resource;
49640001 1882 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1883 WRITE32(NFS4_FH_PERSISTENT);
49640001 1884 else
e34ac862 1885 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1886 }
1887 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 1888 if ((buflen -= 8) < 0)
1889 goto out_resource;
c654b8a9 1890 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 1891 }
1892 if (bmval0 & FATTR4_WORD0_SIZE) {
1893 if ((buflen -= 8) < 0)
1894 goto out_resource;
1895 WRITE64(stat.size);
1896 }
1897 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1898 if ((buflen -= 4) < 0)
1899 goto out_resource;
1900 WRITE32(1);
1901 }
1902 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1903 if ((buflen -= 4) < 0)
1904 goto out_resource;
1905 WRITE32(1);
1906 }
1907 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1908 if ((buflen -= 4) < 0)
1909 goto out_resource;
1910 WRITE32(0);
1911 }
1912 if (bmval0 & FATTR4_WORD0_FSID) {
1913 if ((buflen -= 16) < 0)
1914 goto out_resource;
42ca0993
BF		 1915 if (exp->ex_fslocs.migrated) {
1916 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1917 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1918 } else switch(fsid_source(fhp)) {
1919 case FSIDSOURCE_FSID:
1da177e4
LT		 1920 WRITE64((u64)exp->ex_fsid);
1921 WRITE64((u64)0);
af6a4e28
N		 1922 break;
1923 case FSIDSOURCE_DEV:
1da177e4
LT		 1924 WRITE32(0);
1925 WRITE32(MAJOR(stat.dev));
1926 WRITE32(0);
1927 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1928 break;
1929 case FSIDSOURCE_UUID:
1930 WRITEMEM(exp->ex_uuid, 16);
1931 break;
1da177e4
LT		 1932 }
1933 }
1934 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1935 if ((buflen -= 4) < 0)
1936 goto out_resource;
1937 WRITE32(0);
1938 }
1939 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1940 if ((buflen -= 4) < 0)
1941 goto out_resource;
cf07d2ea 1942 WRITE32(nfsd4_lease);
1da177e4
LT		 1943 }
1944 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1945 if ((buflen -= 4) < 0)
1946 goto out_resource;
42ca0993 1947 WRITE32(rdattr_err);
1da177e4
LT		 1948 }
1949 if (bmval0 & FATTR4_WORD0_ACL) {
1950 struct nfs4_ace *ace;
1da177e4
LT		 1951
1952 if (acl == NULL) {
1953 if ((buflen -= 4) < 0)
1954 goto out_resource;
1955
1956 WRITE32(0);
1957 goto out_acl;
1958 }
1959 if ((buflen -= 4) < 0)
1960 goto out_resource;
1961 WRITE32(acl->naces);
1962
28e05dd8 1963 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1964 if ((buflen -= 4*3) < 0)
1965 goto out_resource;
1966 WRITE32(ace->type);
1967 WRITE32(ace->flag);
1968 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1969 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1970 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1971 &p, &buflen);
1972 if (status == nfserr_resource)
1973 goto out_resource;
1974 if (status)
1975 goto out;
1976 }
1977 }
1978out_acl:
1979 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1980 if ((buflen -= 4) < 0)
1981 goto out_resource;
1982 WRITE32(aclsupport ?
1983 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1984 }
1985 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1986 if ((buflen -= 4) < 0)
1987 goto out_resource;
1988 WRITE32(1);
1989 }
1990 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1991 if ((buflen -= 4) < 0)
1992 goto out_resource;
1993 WRITE32(1);
1994 }
1995 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1996 if ((buflen -= 4) < 0)
1997 goto out_resource;
1998 WRITE32(1);
1999 }
2000 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2001 if ((buflen -= 4) < 0)
2002 goto out_resource;
2003 WRITE32(1);
2004 }
2005 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2006 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2007 if (buflen < 0)
2008 goto out_resource;
2009 WRITE32(fhp->fh_handle.fh_size);
2010 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2011 }
2012 if (bmval0 & FATTR4_WORD0_FILEID) {
2013 if ((buflen -= 8) < 0)
2014 goto out_resource;
40ee5dc6 2015 WRITE64(stat.ino);
1da177e4
LT		 2016 }
2017 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2018 if ((buflen -= 8) < 0)
2019 goto out_resource;
2020 WRITE64((u64) statfs.f_ffree);
2021 }
2022 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2023 if ((buflen -= 8) < 0)
2024 goto out_resource;
2025 WRITE64((u64) statfs.f_ffree);
2026 }
2027 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2028 if ((buflen -= 8) < 0)
2029 goto out_resource;
2030 WRITE64((u64) statfs.f_files);
2031 }
81c3f413
BF		 2032 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2033 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2034 if (status == nfserr_resource)
2035 goto out_resource;
2036 if (status)
2037 goto out;
2038 }
1da177e4
LT		 2039 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2040 if ((buflen -= 4) < 0)
2041 goto out_resource;
2042 WRITE32(1);
2043 }
2044 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2045 if ((buflen -= 8) < 0)
2046 goto out_resource;
2047 WRITE64(~(u64)0);
2048 }
2049 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2050 if ((buflen -= 4) < 0)
2051 goto out_resource;
2052 WRITE32(255);
2053 }
2054 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2055 if ((buflen -= 4) < 0)
2056 goto out_resource;
a16e92ed 2057 WRITE32(statfs.f_namelen);
1da177e4
LT		 2058 }
2059 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2060 if ((buflen -= 8) < 0)
2061 goto out_resource;
7adae489 2062 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2063 }
2064 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2065 if ((buflen -= 8) < 0)
2066 goto out_resource;
7adae489 2067 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2068 }
2069 if (bmval1 & FATTR4_WORD1_MODE) {
2070 if ((buflen -= 4) < 0)
2071 goto out_resource;
2072 WRITE32(stat.mode & S_IALLUGO);
2073 }
2074 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2075 if ((buflen -= 4) < 0)
2076 goto out_resource;
2077 WRITE32(1);
2078 }
2079 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2080 if ((buflen -= 4) < 0)
2081 goto out_resource;
2082 WRITE32(stat.nlink);
2083 }
2084 if (bmval1 & FATTR4_WORD1_OWNER) {
2085 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2086 if (status == nfserr_resource)
2087 goto out_resource;
2088 if (status)
2089 goto out;
2090 }
2091 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2092 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2093 if (status == nfserr_resource)
2094 goto out_resource;
2095 if (status)
2096 goto out;
2097 }
2098 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2099 if ((buflen -= 8) < 0)
2100 goto out_resource;
2101 WRITE32((u32) MAJOR(stat.rdev));
2102 WRITE32((u32) MINOR(stat.rdev));
2103 }
2104 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2105 if ((buflen -= 8) < 0)
2106 goto out_resource;
2107 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2108 WRITE64(dummy64);
2109 }
2110 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2111 if ((buflen -= 8) < 0)
2112 goto out_resource;
2113 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2114 WRITE64(dummy64);
2115 }
2116 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2117 if ((buflen -= 8) < 0)
2118 goto out_resource;
2119 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2120 WRITE64(dummy64);
2121 }
2122 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2123 if ((buflen -= 8) < 0)
2124 goto out_resource;
2125 dummy64 = (u64)stat.blocks << 9;
2126 WRITE64(dummy64);
2127 }
2128 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2129 if ((buflen -= 12) < 0)
2130 goto out_resource;
2131 WRITE32(0);
2132 WRITE32(stat.atime.tv_sec);
2133 WRITE32(stat.atime.tv_nsec);
2134 }
2135 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2136 if ((buflen -= 12) < 0)
2137 goto out_resource;
2138 WRITE32(0);
2139 WRITE32(1);
2140 WRITE32(0);
2141 }
2142 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2143 if ((buflen -= 12) < 0)
2144 goto out_resource;
2145 WRITE32(0);
2146 WRITE32(stat.ctime.tv_sec);
2147 WRITE32(stat.ctime.tv_nsec);
2148 }
2149 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2150 if ((buflen -= 12) < 0)
2151 goto out_resource;
2152 WRITE32(0);
2153 WRITE32(stat.mtime.tv_sec);
2154 WRITE32(stat.mtime.tv_nsec);
2155 }
2156 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2157 if ((buflen -= 8) < 0)
2158 goto out_resource;
406a7ea9
FF		 2159 /*
2160 * Get parent's attributes if not ignoring crossmount
2161 * and this is the root of a cross-mounted filesystem.
2162 */
2163 if (ignore_crossmnt == 0 &&
462d6057
AV		 2164 dentry == exp->ex_path.mnt->mnt_root) {
2165 struct path path = exp->ex_path;
2166 path_get(&path);
2167 while (follow_up(&path)) {
2168 if (path.dentry != path.mnt->mnt_root)
2169 break;
2170 }
2171 err = vfs_getattr(path.mnt, path.dentry, &stat);
2172 path_put(&path);
40ee5dc6
PS		 2173 if (err)
2174 goto out_nfserr;
2175 }
2176 WRITE64(stat.ino);
1da177e4 2177 }
8c18f205
BH		 2178 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2179 WRITE32(3);
2180 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2181 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2182 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2183 }
7e705706 2184
1da177e4
LT		 2185 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2186 *countp = p - buffer;
2187 status = nfs_ok;
2188
2189out:
28e05dd8 2190 kfree(acl);
1da177e4
LT		 2191 if (fhp == &tempfh)
2192 fh_put(&tempfh);
2193 return status;
2194out_nfserr:
b8dd7b9a 2195 status = nfserrno(err);
1da177e4
LT		 2196 goto out;
2197out_resource:
2198 *countp = 0;
2199 status = nfserr_resource;
2200 goto out;
2201out_serverfault:
2202 status = nfserr_serverfault;
2203 goto out;
2204}
2205
c0ce6ec8
BF		 2206static inline int attributes_need_mount(u32 *bmval)
2207{
2208 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2209 return 1;
2210 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2211 return 1;
2212 return 0;
2213}
2214
b37ad28b 2215static __be32
1da177e4 2216nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2217 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2218{
2219 struct svc_export *exp = cd->rd_fhp->fh_export;
2220 struct dentry *dentry;
b37ad28b 2221 __be32 nfserr;
406a7ea9 2222 int ignore_crossmnt = 0;
1da177e4
LT		 2223
2224 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2225 if (IS_ERR(dentry))
2226 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2227 if (!dentry->d_inode) {
2228 /*
2229 * nfsd_buffered_readdir drops the i_mutex between
2230 * readdir and calling this callback, leaving a window
2231 * where this directory entry could have gone away.
2232 */
2233 dput(dentry);
2234 return nfserr_noent;
2235 }
1da177e4
LT		 2236
2237 exp_get(exp);
406a7ea9
FF		 2238 /*
2239 * In the case of a mountpoint, the client may be asking for
2240 * attributes that are only properties of the underlying filesystem
2241 * as opposed to the cross-mounted file system. In such a case,
2242 * we will not follow the cross mount and will fill the attribtutes
2243 * directly from the mountpoint dentry.
2244 */
3227fa41 2245 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2246 int err;
2247
3227fa41
BF		 2248 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2249 && !attributes_need_mount(cd->rd_bmval)) {
2250 ignore_crossmnt = 1;
2251 goto out_encode;
2252 }
dcb488a3
AA		 2253 /*
2254 * Why the heck aren't we just using nfsd_lookup??
2255 * Different "."/".." handling? Something else?
2256 * At least, add a comment here to explain....
2257 */
021d3a72
BF		 2258 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2259 if (err) {
2260 nfserr = nfserrno(err);
1da177e4
LT		 2261 goto out_put;
2262 }
dcb488a3
AA		 2263 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2264 if (nfserr)
2265 goto out_put;
1da177e4
LT		 2266
2267 }
3227fa41 2268out_encode:
1da177e4 2269 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2270 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2271out_put:
2272 dput(dentry);
2273 exp_put(exp);
2274 return nfserr;
2275}
2276
2ebbc012 2277static __be32 *
b37ad28b 2278nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2279{
2ebbc012 2280 __be32 *attrlenp;
1da177e4
LT		 2281
2282 if (buflen < 6)
2283 return NULL;
2284 *p++ = htonl(2);
2285 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2286 *p++ = htonl(0); /* bmval1 */
2287
2288 attrlenp = p++;
2289 *p++ = nfserr; /* no htonl */
2290 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2291 return p;
2292}
2293
2294static int
a0ad13ef
N		 2295nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2296 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2297{
a0ad13ef 2298 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2299 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2300 int buflen;
2ebbc012 2301 __be32 *p = cd->buffer;
b2c0cea6 2302 __be32 *cookiep;
b37ad28b 2303 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2304
2305 /* In nfsv4, "." and ".." never make it onto the wire.. */
2306 if (name && isdotent(name, namlen)) {
2307 cd->common.err = nfs_ok;
2308 return 0;
2309 }
2310
2311 if (cd->offset)
2312 xdr_encode_hyper(cd->offset, (u64) offset);
2313
2314 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2315 if (buflen < 0)
2316 goto fail;
2317
2318 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2319 cookiep = p;
1da177e4
LT		 2320 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2321 p = xdr_encode_array(p, name, namlen); /* name length & name */
2322
2323 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2324 switch (nfserr) {
2325 case nfs_ok:
2326 p += buflen;
2327 break;
2328 case nfserr_resource:
2329 nfserr = nfserr_toosmall;
2330 goto fail;
b2c0cea6
BF		 2331 case nfserr_noent:
2332 goto skip_entry;
1da177e4
LT		 2333 default:
2334 /*
2335 * If the client requested the RDATTR_ERROR attribute,
2336 * we stuff the error code into this attribute
2337 * and continue. If this attribute was not requested,
2338 * then in accordance with the spec, we fail the
2339 * entire READDIR operation(!)
2340 */
2341 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2342 goto fail;
1da177e4 2343 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2344 if (p == NULL) {
2345 nfserr = nfserr_toosmall;
1da177e4 2346 goto fail;
34081efc 2347 }
1da177e4
LT		 2348 }
2349 cd->buflen -= (p - cd->buffer);
2350 cd->buffer = p;
b2c0cea6
BF		 2351 cd->offset = cookiep;
2352skip_entry:
1da177e4
LT		 2353 cd->common.err = nfs_ok;
2354 return 0;
2355fail:
2356 cd->common.err = nfserr;
2357 return -EINVAL;
2358}
2359
e2f282b9
BH		 2360static void
2361nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2362{
bc749ca4 2363 __be32 *p;
e2f282b9
BH		 2364
2365 RESERVE_SPACE(sizeof(stateid_t));
2366 WRITE32(sid->si_generation);
2367 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2368 ADJUST_ARGS();
2369}
2370
695e12f8 2371static __be32
b37ad28b 2372nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2373{
bc749ca4 2374 __be32 *p;
1da177e4
LT		 2375
2376 if (!nfserr) {
2377 RESERVE_SPACE(8);
2378 WRITE32(access->ac_supported);
2379 WRITE32(access->ac_resp_access);
2380 ADJUST_ARGS();
2381 }
695e12f8 2382 return nfserr;
1da177e4
LT		 2383}
2384
695e12f8 2385static __be32
b37ad28b 2386nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2387{
2388 ENCODE_SEQID_OP_HEAD;
2389
e2f282b9
BH		 2390 if (!nfserr)
2391 nfsd4_encode_stateid(resp, &close->cl_stateid);
2392
1da177e4 2393 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2394 return nfserr;
1da177e4
LT		 2395}
2396
2397
695e12f8 2398static __be32
b37ad28b 2399nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2400{
bc749ca4 2401 __be32 *p;
1da177e4
LT		 2402
2403 if (!nfserr) {
2404 RESERVE_SPACE(8);
2405 WRITEMEM(commit->co_verf.data, 8);
2406 ADJUST_ARGS();
2407 }
695e12f8 2408 return nfserr;
1da177e4
LT		 2409}
2410
695e12f8 2411static __be32
b37ad28b 2412nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2413{
bc749ca4 2414 __be32 *p;
1da177e4
LT		 2415
2416 if (!nfserr) {
2417 RESERVE_SPACE(32);
c654b8a9 2418 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2419 WRITE32(2);
2420 WRITE32(create->cr_bmval[0]);
2421 WRITE32(create->cr_bmval[1]);
2422 ADJUST_ARGS();
2423 }
695e12f8 2424 return nfserr;
1da177e4
LT		 2425}
2426
b37ad28b
AV		 2427static __be32
2428nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2429{
2430 struct svc_fh *fhp = getattr->ga_fhp;
2431 int buflen;
2432
2433 if (nfserr)
2434 return nfserr;
2435
2436 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2437 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2438 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2439 resp->rqstp, 0);
1da177e4
LT		 2440 if (!nfserr)
2441 resp->p += buflen;
2442 return nfserr;
2443}
2444
695e12f8
BH		 2445static __be32
2446nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2447{
695e12f8 2448 struct svc_fh *fhp = *fhpp;
1da177e4 2449 unsigned int len;
bc749ca4 2450 __be32 *p;
1da177e4
LT		 2451
2452 if (!nfserr) {
2453 len = fhp->fh_handle.fh_size;
2454 RESERVE_SPACE(len + 4);
2455 WRITE32(len);
2456 WRITEMEM(&fhp->fh_handle.fh_base, len);
2457 ADJUST_ARGS();
2458 }
695e12f8 2459 return nfserr;
1da177e4
LT		 2460}
2461
2462/*
2463* Including all fields other than the name, a LOCK4denied structure requires
2464* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2465*/
2466static void
2467nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2468{
bc749ca4 2469 __be32 *p;
1da177e4
LT		 2470
2471 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2472 WRITE64(ld->ld_start);
2473 WRITE64(ld->ld_length);
2474 WRITE32(ld->ld_type);
2475 if (ld->ld_sop) {
2476 WRITEMEM(&ld->ld_clientid, 8);
2477 WRITE32(ld->ld_sop->so_owner.len);
2478 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2479 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2480 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2481 WRITE64((u64)0); /* clientid */
2482 WRITE32(0); /* length of owner name */
2483 }
2484 ADJUST_ARGS();
2485}
2486
695e12f8 2487static __be32
b37ad28b 2488nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2489{
1da177e4
LT		 2490 ENCODE_SEQID_OP_HEAD;
2491
e2f282b9
BH		 2492 if (!nfserr)
2493 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2494 else if (nfserr == nfserr_denied)
1da177e4
LT		 2495 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2496
3a65588a 2497 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2498 return nfserr;
1da177e4
LT		 2499}
2500
695e12f8 2501static __be32
b37ad28b 2502nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2503{
2504 if (nfserr == nfserr_denied)
2505 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2506 return nfserr;
1da177e4
LT		 2507}
2508
695e12f8 2509static __be32
b37ad28b 2510nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2511{
2512 ENCODE_SEQID_OP_HEAD;
2513
e2f282b9
BH		 2514 if (!nfserr)
2515 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2516
1da177e4 2517 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2518 return nfserr;
1da177e4
LT		 2519}
2520
2521
695e12f8 2522static __be32
b37ad28b 2523nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2524{
bc749ca4 2525 __be32 *p;
1da177e4
LT		 2526
2527 if (!nfserr) {
2528 RESERVE_SPACE(20);
c654b8a9 2529 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2530 ADJUST_ARGS();
2531 }
695e12f8 2532 return nfserr;
1da177e4
LT		 2533}
2534
2535
695e12f8 2536static __be32
b37ad28b 2537nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2538{
bc749ca4 2539 __be32 *p;
1da177e4
LT		 2540 ENCODE_SEQID_OP_HEAD;
2541
2542 if (nfserr)
2543 goto out;
2544
e2f282b9
BH		 2545 nfsd4_encode_stateid(resp, &open->op_stateid);
2546 RESERVE_SPACE(40);
c654b8a9 2547 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2548 WRITE32(open->op_rflags);
2549 WRITE32(2);
2550 WRITE32(open->op_bmval[0]);
2551 WRITE32(open->op_bmval[1]);
2552 WRITE32(open->op_delegate_type);
2553 ADJUST_ARGS();
2554
2555 switch (open->op_delegate_type) {
2556 case NFS4_OPEN_DELEGATE_NONE:
2557 break;
2558 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2559 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2560 RESERVE_SPACE(20);
7b190fec 2561 WRITE32(open->op_recall);
1da177e4
LT		 2562
2563 /*
2564 * TODO: ACE's in delegations
2565 */
2566 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2567 WRITE32(0);
2568 WRITE32(0);
2569 WRITE32(0); /* XXX: is NULL principal ok? */
2570 ADJUST_ARGS();
2571 break;
2572 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2573 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2574 RESERVE_SPACE(32);
1da177e4
LT		 2575 WRITE32(0);
2576
2577 /*
2578 * TODO: space_limit's in delegations
2579 */
2580 WRITE32(NFS4_LIMIT_SIZE);
2581 WRITE32(~(u32)0);
2582 WRITE32(~(u32)0);
2583
2584 /*
2585 * TODO: ACE's in delegations
2586 */
2587 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2588 WRITE32(0);
2589 WRITE32(0);
2590 WRITE32(0); /* XXX: is NULL principal ok? */
2591 ADJUST_ARGS();
2592 break;
2593 default:
2594 BUG();
2595 }
2596 /* XXX save filehandle here */
2597out:
2598 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2599 return nfserr;
1da177e4
LT		 2600}
2601
695e12f8 2602static __be32
b37ad28b 2603nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2604{
2605 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2606
2607 if (!nfserr)
2608 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2609
2610 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2611 return nfserr;
1da177e4
LT		 2612}
2613
695e12f8 2614static __be32
b37ad28b 2615nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2616{
2617 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2618
2619 if (!nfserr)
2620 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2621
2622 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2623 return nfserr;
1da177e4
LT		 2624}
2625
b37ad28b
AV		 2626static __be32
2627nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2628 struct nfsd4_read *read)
1da177e4
LT		 2629{
2630 u32 eof;
2631 int v, pn;
2632 unsigned long maxcount;
2633 long len;
bc749ca4 2634 __be32 *p;
1da177e4
LT		 2635
2636 if (nfserr)
2637 return nfserr;
2638 if (resp->xbuf->page_len)
2639 return nfserr_resource;
2640
2641 RESERVE_SPACE(8); /* eof flag and byte count */
2642
7adae489 2643 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2644 if (maxcount > read->rd_length)
2645 maxcount = read->rd_length;
2646
2647 len = maxcount;
2648 v = 0;
2649 while (len > 0) {
44524359 2650 pn = resp->rqstp->rq_resused++;
3cc03b16 2651 resp->rqstp->rq_vec[v].iov_base =
44524359 2652 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2653 resp->rqstp->rq_vec[v].iov_len =
44524359 2654 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2655 v++;
2656 len -= PAGE_SIZE;
2657 }
2658 read->rd_vlen = v;
2659
039a87ca 2660 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2661 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2662 &maxcount);
2663
2664 if (nfserr == nfserr_symlink)
2665 nfserr = nfserr_inval;
2666 if (nfserr)
2667 return nfserr;
44524359
N		 2668 eof = (read->rd_offset + maxcount >=
2669 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2670
2671 WRITE32(eof);
2672 WRITE32(maxcount);
2673 ADJUST_ARGS();
6ed6decc
N		 2674 resp->xbuf->head[0].iov_len = (char*)p
2675 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2676 resp->xbuf->page_len = maxcount;
2677
6ed6decc 2678 /* Use rest of head for padding and remaining ops: */
6ed6decc 2679 resp->xbuf->tail[0].iov_base = p;
1da177e4 2680 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2681 if (maxcount&3) {
6ed6decc
N		 2682 RESERVE_SPACE(4);
2683 WRITE32(0);
1da177e4
LT		 2684 resp->xbuf->tail[0].iov_base += maxcount&3;
2685 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2686 ADJUST_ARGS();
1da177e4
LT		 2687 }
2688 return 0;
2689}
2690
b37ad28b
AV		 2691static __be32
2692nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2693{
2694 int maxcount;
2695 char *page;
bc749ca4 2696 __be32 *p;
1da177e4
LT		 2697
2698 if (nfserr)
2699 return nfserr;
2700 if (resp->xbuf->page_len)
2701 return nfserr_resource;
2702
44524359 2703 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2704
2705 maxcount = PAGE_SIZE;
2706 RESERVE_SPACE(4);
2707
2708 /*
2709 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2710 * if they would overflow the buffer. Is this kosher in NFSv4? If
2711 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2712 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2713 */
2714 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2715 if (nfserr == nfserr_isdir)
2716 return nfserr_inval;
2717 if (nfserr)
2718 return nfserr;
2719
2720 WRITE32(maxcount);
2721 ADJUST_ARGS();
6ed6decc
N		 2722 resp->xbuf->head[0].iov_len = (char*)p
2723 - (char*)resp->xbuf->head[0].iov_base;
2724 resp->xbuf->page_len = maxcount;
1da177e4 2725
6ed6decc 2726 /* Use rest of head for padding and remaining ops: */
6ed6decc 2727 resp->xbuf->tail[0].iov_base = p;
1da177e4 2728 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2729 if (maxcount&3) {
6ed6decc
N		 2730 RESERVE_SPACE(4);
2731 WRITE32(0);
1da177e4
LT		 2732 resp->xbuf->tail[0].iov_base += maxcount&3;
2733 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2734 ADJUST_ARGS();
1da177e4
LT		 2735 }
2736 return 0;
2737}
2738
b37ad28b
AV		 2739static __be32
2740nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2741{
2742 int maxcount;
2743 loff_t offset;
2ebbc012 2744 __be32 *page, *savep, *tailbase;
bc749ca4 2745 __be32 *p;
1da177e4
LT		 2746
2747 if (nfserr)
2748 return nfserr;
2749 if (resp->xbuf->page_len)
2750 return nfserr_resource;
2751
2752 RESERVE_SPACE(8); /* verifier */
2753 savep = p;
2754
2755 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2756 WRITE32(0);
2757 WRITE32(0);
2758 ADJUST_ARGS();
2759 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2760 tailbase = p;
1da177e4
LT		 2761
2762 maxcount = PAGE_SIZE;
2763 if (maxcount > readdir->rd_maxcount)
2764 maxcount = readdir->rd_maxcount;
2765
2766 /*
2767 * Convert from bytes to words, account for the two words already
2768 * written, make sure to leave two words at the end for the next
2769 * pointer and eof field.
2770 */
2771 maxcount = (maxcount >> 2) - 4;
2772 if (maxcount < 0) {
2773 nfserr = nfserr_toosmall;
2774 goto err_no_verf;
2775 }
2776
44524359 2777 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2778 readdir->common.err = 0;
2779 readdir->buflen = maxcount;
2780 readdir->buffer = page;
2781 readdir->offset = NULL;
2782
2783 offset = readdir->rd_cookie;
2784 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2785 &offset,
2786 &readdir->common, nfsd4_encode_dirent);
2787 if (nfserr == nfs_ok &&
2788 readdir->common.err == nfserr_toosmall &&
2789 readdir->buffer == page)
2790 nfserr = nfserr_toosmall;
2791 if (nfserr == nfserr_symlink)
2792 nfserr = nfserr_notdir;
2793 if (nfserr)
2794 goto err_no_verf;
2795
2796 if (readdir->offset)
2797 xdr_encode_hyper(readdir->offset, offset);
2798
2799 p = readdir->buffer;
2800 *p++ = 0; /* no more entries */
2801 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2802 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2803 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2804
bb6e8a9f 2805 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2806 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2807 resp->xbuf->tail[0].iov_len = 0;
2808 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2809 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2810
2811 return 0;
2812err_no_verf:
2813 p = savep;
2814 ADJUST_ARGS();
2815 return nfserr;
2816}
2817
695e12f8 2818static __be32
b37ad28b 2819nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 2820{
bc749ca4 2821 __be32 *p;
1da177e4
LT		 2822
2823 if (!nfserr) {
2824 RESERVE_SPACE(20);
c654b8a9 2825 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 2826 ADJUST_ARGS();
2827 }
695e12f8 2828 return nfserr;
1da177e4
LT		 2829}
2830
695e12f8 2831static __be32
b37ad28b 2832nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 2833{
bc749ca4 2834 __be32 *p;
1da177e4
LT		 2835
2836 if (!nfserr) {
2837 RESERVE_SPACE(40);
c654b8a9
BF		 2838 write_cinfo(&p, &rename->rn_sinfo);
2839 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 2840 ADJUST_ARGS();
2841 }
695e12f8 2842 return nfserr;
1da177e4
LT		 2843}
2844
695e12f8 2845static __be32
22b6dee8
MJ		 2846nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2847 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 2848{
2849 int i = 0;
4796f457
BF		 2850 u32 nflavs;
2851 struct exp_flavor_info *flavs;
2852 struct exp_flavor_info def_flavs[2];
bc749ca4 2853 __be32 *p;
dcb488a3
AA		 2854
2855 if (nfserr)
2856 goto out;
4796f457
BF		 2857 if (exp->ex_nflavors) {
2858 flavs = exp->ex_flavors;
2859 nflavs = exp->ex_nflavors;
2860 } else { /* Handling of some defaults in absence of real secinfo: */
2861 flavs = def_flavs;
2862 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2863 nflavs = 2;
2864 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2865 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2866 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2867 nflavs = 1;
2868 flavs[0].pseudoflavor
2869 = svcauth_gss_flavor(exp->ex_client);
2870 } else {
2871 nflavs = 1;
2872 flavs[0].pseudoflavor
2873 = exp->ex_client->flavour->flavour;
2874 }
2875 }
2876
dcb488a3 2877 RESERVE_SPACE(4);
4796f457 2878 WRITE32(nflavs);
dcb488a3 2879 ADJUST_ARGS();
4796f457
BF		 2880 for (i = 0; i < nflavs; i++) {
2881 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2882 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2883
2884 if (gm) {
2885 RESERVE_SPACE(4);
2886 WRITE32(RPC_AUTH_GSS);
2887 ADJUST_ARGS();
2888 RESERVE_SPACE(4 + gm->gm_oid.len);
2889 WRITE32(gm->gm_oid.len);
2890 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2891 ADJUST_ARGS();
2892 RESERVE_SPACE(4);
2893 WRITE32(0); /* qop */
2894 ADJUST_ARGS();
2895 RESERVE_SPACE(4);
2896 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2897 ADJUST_ARGS();
2898 gss_mech_put(gm);
2899 } else {
2900 RESERVE_SPACE(4);
2901 WRITE32(flav);
2902 ADJUST_ARGS();
2903 }
2904 }
2905out:
2906 if (exp)
2907 exp_put(exp);
695e12f8 2908 return nfserr;
dcb488a3
AA		 2909}
2910
22b6dee8
MJ		 2911static __be32
2912nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2913 struct nfsd4_secinfo *secinfo)
2914{
2915 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
2916}
2917
2918static __be32
2919nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
2920 struct nfsd4_secinfo_no_name *secinfo)
2921{
2922 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
2923}
2924
1da177e4
LT		 2925/*
2926 * The SETATTR encode routine is special -- it always encodes a bitmap,
2927 * regardless of the error status.
2928 */
695e12f8 2929static __be32
b37ad28b 2930nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 2931{
bc749ca4 2932 __be32 *p;
1da177e4
LT		 2933
2934 RESERVE_SPACE(12);
2935 if (nfserr) {
2936 WRITE32(2);
2937 WRITE32(0);
2938 WRITE32(0);
2939 }
2940 else {
2941 WRITE32(2);
2942 WRITE32(setattr->sa_bmval[0]);
2943 WRITE32(setattr->sa_bmval[1]);
2944 }
2945 ADJUST_ARGS();
695e12f8 2946 return nfserr;
1da177e4
LT		 2947}
2948
695e12f8 2949static __be32
b37ad28b 2950nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 2951{
bc749ca4 2952 __be32 *p;
1da177e4
LT		 2953
2954 if (!nfserr) {
2955 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2956 WRITEMEM(&scd->se_clientid, 8);
2957 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2958 ADJUST_ARGS();
2959 }
2960 else if (nfserr == nfserr_clid_inuse) {
2961 RESERVE_SPACE(8);
2962 WRITE32(0);
2963 WRITE32(0);
2964 ADJUST_ARGS();
2965 }
695e12f8 2966 return nfserr;
1da177e4
LT		 2967}
2968
695e12f8 2969static __be32
b37ad28b 2970nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 2971{
bc749ca4 2972 __be32 *p;
1da177e4
LT		 2973
2974 if (!nfserr) {
2975 RESERVE_SPACE(16);
2976 WRITE32(write->wr_bytes_written);
2977 WRITE32(write->wr_how_written);
2978 WRITEMEM(write->wr_verifier.data, 8);
2979 ADJUST_ARGS();
2980 }
695e12f8 2981 return nfserr;
1da177e4
LT		 2982}
2983
2db134eb
AA		 2984static __be32
2985nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2986 struct nfsd4_exchange_id *exid)
2987{
bc749ca4 2988 __be32 *p;
0733d213
AA		 2989 char *major_id;
2990 char *server_scope;
2991 int major_id_sz;
2992 int server_scope_sz;
2993 uint64_t minor_id = 0;
2994
2995 if (nfserr)
2996 return nfserr;
2997
2998 major_id = utsname()->nodename;
2999 major_id_sz = strlen(major_id);
3000 server_scope = utsname()->nodename;
3001 server_scope_sz = strlen(server_scope);
3002
3003 RESERVE_SPACE(
3004 8 /* eir_clientid */ +
3005 4 /* eir_sequenceid */ +
3006 4 /* eir_flags */ +
3007 4 /* spr_how (SP4_NONE) */ +
3008 8 /* so_minor_id */ +
3009 4 /* so_major_id.len */ +
3010 (XDR_QUADLEN(major_id_sz) * 4) +
3011 4 /* eir_server_scope.len */ +
3012 (XDR_QUADLEN(server_scope_sz) * 4) +
3013 4 /* eir_server_impl_id.count (0) */);
3014
3015 WRITEMEM(&exid->clientid, 8);
3016 WRITE32(exid->seqid);
3017 WRITE32(exid->flags);
3018
3019 /* state_protect4_r. Currently only support SP4_NONE */
3020 BUG_ON(exid->spa_how != SP4_NONE);
3021 WRITE32(exid->spa_how);
3022
3023 /* The server_owner struct */
3024 WRITE64(minor_id); /* Minor id */
3025 /* major id */
3026 WRITE32(major_id_sz);
3027 WRITEMEM(major_id, major_id_sz);
3028
3029 /* Server scope */
3030 WRITE32(server_scope_sz);
3031 WRITEMEM(server_scope, server_scope_sz);
3032
3033 /* Implementation id */
3034 WRITE32(0); /* zero length nfs_impl_id4 array */
3035 ADJUST_ARGS();
3036 return 0;
2db134eb
AA		 3037}
3038
3039static __be32
3040nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3041 struct nfsd4_create_session *sess)
3042{
bc749ca4 3043 __be32 *p;
ec6b5d7b
AA		 3044
3045 if (nfserr)
3046 return nfserr;
3047
3048 RESERVE_SPACE(24);
3049 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3050 WRITE32(sess->seqid);
3051 WRITE32(sess->flags);
3052 ADJUST_ARGS();
3053
3054 RESERVE_SPACE(28);
3055 WRITE32(0); /* headerpadsz */
3056 WRITE32(sess->fore_channel.maxreq_sz);
3057 WRITE32(sess->fore_channel.maxresp_sz);
3058 WRITE32(sess->fore_channel.maxresp_cached);
3059 WRITE32(sess->fore_channel.maxops);
3060 WRITE32(sess->fore_channel.maxreqs);
3061 WRITE32(sess->fore_channel.nr_rdma_attrs);
3062 ADJUST_ARGS();
3063
3064 if (sess->fore_channel.nr_rdma_attrs) {
3065 RESERVE_SPACE(4);
3066 WRITE32(sess->fore_channel.rdma_attrs);
3067 ADJUST_ARGS();
3068 }
3069
3070 RESERVE_SPACE(28);
3071 WRITE32(0); /* headerpadsz */
3072 WRITE32(sess->back_channel.maxreq_sz);
3073 WRITE32(sess->back_channel.maxresp_sz);
3074 WRITE32(sess->back_channel.maxresp_cached);
3075 WRITE32(sess->back_channel.maxops);
3076 WRITE32(sess->back_channel.maxreqs);
3077 WRITE32(sess->back_channel.nr_rdma_attrs);
3078 ADJUST_ARGS();
3079
3080 if (sess->back_channel.nr_rdma_attrs) {
3081 RESERVE_SPACE(4);
3082 WRITE32(sess->back_channel.rdma_attrs);
3083 ADJUST_ARGS();
3084 }
3085 return 0;
2db134eb
AA		 3086}
3087
3088static __be32
3089nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3090 struct nfsd4_destroy_session *destroy_session)
3091{
2db134eb
AA		 3092 return nfserr;
3093}
3094
bf864a31 3095__be32
2db134eb
AA		 3096nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3097 struct nfsd4_sequence *seq)
3098{
bc749ca4 3099 __be32 *p;
b85d4c01
BH		 3100
3101 if (nfserr)
3102 return nfserr;
3103
3104 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3105 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3106 WRITE32(seq->seqid);
3107 WRITE32(seq->slotid);
3108 WRITE32(seq->maxslots);
3109 /*
3110 * FIXME: for now:
3111 * target_maxslots = maxslots
3112 * status_flags = 0
3113 */
3114 WRITE32(seq->maxslots);
3115 WRITE32(0);
3116
3117 ADJUST_ARGS();
557ce264 3118 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3119 return 0;
2db134eb
AA		 3120}
3121
695e12f8
BH		 3122static __be32
3123nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3124{
3125 return nfserr;
3126}
3127
3128typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3129
2db134eb
AA		 3130/*
3131 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3132 * since we don't need to filter out obsolete ops as this is
3133 * done in the decoding phase.
3134 */
695e12f8 3135static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3136 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3137 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3138 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3139 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3140 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3141 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3143 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3144 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3145 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3146 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3147 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3148 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3149 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3150 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3151 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3152 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3153 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3154 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3155 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3156 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3157 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3158 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3159 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3160 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3161 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3162 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3163 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3164 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3165 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3166 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3167 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3168 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3169 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3170 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3171 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3172 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3173
3174 /* NFSv4.1 operations */
3175 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3176 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3177 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3178 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3179 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3180 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3181 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3182 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3183 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3184 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3185 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3186 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3187 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3188 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3189 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3190 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3191 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3192 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3193 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3194};
3195
496c262c
AA		 3196/*
3197 * Calculate the total amount of memory that the compound response has taken
3198 * after encoding the current operation.
3199 *
3200 * pad: add on 8 bytes for the next operation's op_code and status so that
3201 * there is room to cache a failure on the next operation.
3202 *
3203 * Compare this length to the session se_fmaxresp_cached.
3204 *
3205 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3206 * will be at least a page and will therefore hold the xdr_buf head.
3207 */
3208static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3209{
3210 int status = 0;
3211 struct xdr_buf *xb = &resp->rqstp->rq_res;
3212 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3213 struct nfsd4_session *session = NULL;
3214 struct nfsd4_slot *slot = resp->cstate.slot;
3215 u32 length, tlen = 0, pad = 8;
3216
3217 if (!nfsd4_has_session(&resp->cstate))
3218 return status;
3219
3220 session = resp->cstate.session;
557ce264 3221 if (session == NULL || slot->sl_cachethis == 0)
496c262c
AA		 3222 return status;
3223
3224 if (resp->opcnt >= args->opcnt)
3225 pad = 0; /* this is the last operation */
3226
3227 if (xb->page_len == 0) {
3228 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3229 } else {
3230 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3231 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3232
3233 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3234 }
3235 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3236 length, xb->page_len, tlen, pad);
3237
6c18ba9f 3238 if (length <= session->se_fchannel.maxresp_cached)
496c262c
AA		 3239 return status;
3240 else
3241 return nfserr_rep_too_big_to_cache;
3242}
3243
1da177e4
LT		 3244void
3245nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3246{
2ebbc012 3247 __be32 *statp;
bc749ca4 3248 __be32 *p;
1da177e4
LT		 3249
3250 RESERVE_SPACE(8);
3251 WRITE32(op->opnum);
3252 statp = p++; /* to be backfilled at the end */
3253 ADJUST_ARGS();
3254
695e12f8
BH		 3255 if (op->opnum == OP_ILLEGAL)
3256 goto status;
3257 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3258 !nfsd4_enc_ops[op->opnum]);
3259 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c
AA		 3260 /* nfsd4_check_drc_limit guarantees enough room for error status */
3261 if (!op->status && nfsd4_check_drc_limit(resp))
3262 op->status = nfserr_rep_too_big_to_cache;
695e12f8 3263status:
1da177e4
LT		 3264 /*
3265 * Note: We write the status directly, instead of using WRITE32(),
3266 * since it is already in network byte order.
3267 */
3268 *statp = op->status;
3269}
3270
3271/*
3272 * Encode the reply stored in the stateowner reply cache
3273 *
3274 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3275 * previously sent already encoded operation.
3276 *
3277 * called with nfs4_lock_state() held
3278 */
3279void
3280nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3281{
bc749ca4 3282 __be32 *p;
1da177e4
LT		 3283 struct nfs4_replay *rp = op->replay;
3284
3285 BUG_ON(!rp);
3286
3287 RESERVE_SPACE(8);
3288 WRITE32(op->opnum);
3289 *p++ = rp->rp_status; /* already xdr'ed */
3290 ADJUST_ARGS();
3291
3292 RESERVE_SPACE(rp->rp_buflen);
3293 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3294 ADJUST_ARGS();
3295}
3296
1da177e4 3297int
2ebbc012 3298nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3299{
3300 return xdr_ressize_check(rqstp, p);
3301}
3302
3303void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3304{
3305 if (args->ops != args->iops) {
3306 kfree(args->ops);
3307 args->ops = args->iops;
3308 }
f99d49ad
JJ		 3309 kfree(args->tmpp);
3310 args->tmpp = NULL;
1da177e4
LT		 3311 while (args->to_free) {
3312 struct tmpbuf *tb = args->to_free;
3313 args->to_free = tb->next;
3314 tb->release(tb->buf);
3315 kfree(tb);
3316 }
3317}
3318
3319int
2ebbc012 3320nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3321{
b37ad28b 3322 __be32 status;
1da177e4
LT		 3323
3324 args->p = p;
3325 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3326 args->pagelist = rqstp->rq_arg.pages;
3327 args->pagelen = rqstp->rq_arg.page_len;
3328 args->tmpp = NULL;
3329 args->to_free = NULL;
3330 args->ops = args->iops;
3331 args->rqstp = rqstp;
3332
3333 status = nfsd4_decode_compound(args);
3334 if (status) {
3335 nfsd4_release_compoundargs(args);
3336 }
3337 return !status;
3338}
3339
3340int
2ebbc012 3341nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3342{
3343 /*
3344 * All that remains is to write the tag and operation count...
3345 */
557ce264 3346 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3347 struct kvec *iov;
3348 p = resp->tagp;
3349 *p++ = htonl(resp->taglen);
3350 memcpy(p, resp->tag, resp->taglen);
3351 p += XDR_QUADLEN(resp->taglen);
3352 *p++ = htonl(resp->opcnt);
3353
3354 if (rqstp->rq_res.page_len)
3355 iov = &rqstp->rq_res.tail[0];
3356 else
3357 iov = &rqstp->rq_res.head[0];
3358 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3359 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3360 if (nfsd4_has_session(cs)) {
3361 if (cs->status != nfserr_replay_cache) {
3362 nfsd4_store_cache_entry(resp);
3363 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
dbd65a7e 3364 cs->slot->sl_inuse = false;
26c0c75e 3365 }
d7682988
BH		 3366 /* Renew the clientid on success and on replay */
3367 release_session_client(cs->session);
76407f76 3368 nfsd4_put_session(cs->session);
da3846a2 3369 }
1da177e4
LT		 3370 return 1;
3371}
3372
3373/*
3374 * Local variables:
3375 * c-basic-offset: 8
3376 * End:
3377 */
kernel source for telekom puls (alcatel/mediatek)