]> bbs.cooldavid.org Git - net-next-2.6.git/blame - fs/nfsd/nfs4xdr.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] nfsd: vfs.c endianness annotations
[net-next-2.6.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Server-side XDR for NFSv4
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
43 */
44
45#include <linux/param.h>
46#include <linux/smp.h>
47#include <linux/smp_lock.h>
48#include <linux/fs.h>
49#include <linux/namei.h>
50#include <linux/vfs.h>
51#include <linux/sunrpc/xdr.h>
52#include <linux/sunrpc/svc.h>
53#include <linux/sunrpc/clnt.h>
54#include <linux/nfsd/nfsd.h>
55#include <linux/nfsd/state.h>
56#include <linux/nfsd/xdr4.h>
57#include <linux/nfsd_idmap.h>
58#include <linux/nfs4.h>
59#include <linux/nfs4_acl.h>
60
61#define NFSDDBG_FACILITY NFSDDBG_XDR
62
42ca0993
BF		 63/*
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
67 */
68#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
1da177e4
LT		 71static int
72check_filename(char *str, int len, int err)
73{
74 int i;
75
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
84}
85
86/*
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
91 *
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
95 */
96#define DECODE_HEAD \
2ebbc012 97 __be32 *p; \
1da177e4
LT		 98 int status
99#define DECODE_TAIL \
100 status = 0; \
101out: \
102 return status; \
103xdr_error: \
104 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
105 status = nfserr_bad_xdr; \
106 goto out
107
108#define READ32(x) (x) = ntohl(*p++)
109#define READ64(x) do { \
110 (x) = (u64)ntohl(*p++) << 32; \
111 (x) |= ntohl(*p++); \
112} while (0)
113#define READTIME(x) do { \
114 p++; \
115 (x) = ntohl(*p++); \
116 p++; \
117} while (0)
118#define READMEM(x,nbytes) do { \
119 x = (char *)p; \
120 p += XDR_QUADLEN(nbytes); \
121} while (0)
122#define SAVEMEM(x,nbytes) do { \
123 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
124 savemem(argp, p, nbytes) : \
125 (char *)p)) { \
126 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
127 goto xdr_error; \
128 } \
129 p += XDR_QUADLEN(nbytes); \
130} while (0)
131#define COPYMEM(x,nbytes) do { \
132 memcpy((x), p, nbytes); \
133 p += XDR_QUADLEN(nbytes); \
134} while (0)
135
136/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
137#define READ_BUF(nbytes) do { \
138 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
139 p = argp->p; \
140 argp->p += XDR_QUADLEN(nbytes); \
141 } else if (!(p = read_buf(argp, nbytes))) { \
142 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
143 goto xdr_error; \
144 } \
145} while (0)
146
2ebbc012 147static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
1da177e4
LT		 148{
149 /* We want more bytes than seem to be available.
150 * Maybe we need a new page, maybe we have just run out
151 */
152 int avail = (char*)argp->end - (char*)argp->p;
2ebbc012 153 __be32 *p;
1da177e4
LT		 154 if (avail + argp->pagelen < nbytes)
155 return NULL;
156 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
157 return NULL;
158 /* ok, we can do it with the current plus the next page */
159 if (nbytes <= sizeof(argp->tmp))
160 p = argp->tmp;
161 else {
f99d49ad 162 kfree(argp->tmpp);
1da177e4
LT		 163 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
164 if (!p)
165 return NULL;
166
167 }
168 memcpy(p, argp->p, avail);
169 /* step to next page */
170 argp->p = page_address(argp->pagelist[0]);
171 argp->pagelist++;
172 if (argp->pagelen < PAGE_SIZE) {
173 argp->end = p + (argp->pagelen>>2);
174 argp->pagelen = 0;
175 } else {
176 argp->end = p + (PAGE_SIZE>>2);
177 argp->pagelen -= PAGE_SIZE;
178 }
179 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
180 argp->p += XDR_QUADLEN(nbytes - avail);
181 return p;
182}
183
184static int
185defer_free(struct nfsd4_compoundargs *argp,
186 void (*release)(const void *), void *p)
187{
188 struct tmpbuf *tb;
189
190 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
191 if (!tb)
192 return -ENOMEM;
193 tb->buf = p;
194 tb->release = release;
195 tb->next = argp->to_free;
196 argp->to_free = tb;
197 return 0;
198}
199
2ebbc012 200static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4
LT		 201{
202 void *new = NULL;
203 if (p == argp->tmp) {
204 new = kmalloc(nbytes, GFP_KERNEL);
205 if (!new) return NULL;
206 p = new;
207 memcpy(p, argp->tmp, nbytes);
208 } else {
73dff8be 209 BUG_ON(p != argp->tmpp);
1da177e4
LT		 210 argp->tmpp = NULL;
211 }
212 if (defer_free(argp, kfree, p)) {
213 kfree(new);
214 return NULL;
215 } else
216 return (char *)p;
217}
218
219
220static int
221nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
222{
223 u32 bmlen;
224 DECODE_HEAD;
225
226 bmval[0] = 0;
227 bmval[1] = 0;
228
229 READ_BUF(4);
230 READ32(bmlen);
231 if (bmlen > 1000)
232 goto xdr_error;
233
234 READ_BUF(bmlen << 2);
235 if (bmlen > 0)
236 READ32(bmval[0]);
237 if (bmlen > 1)
238 READ32(bmval[1]);
239
240 DECODE_TAIL;
241}
242
243static int
244nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
245 struct nfs4_acl **acl)
246{
247 int expected_len, len = 0;
248 u32 dummy32;
249 char *buf;
250
251 DECODE_HEAD;
252 iattr->ia_valid = 0;
253 if ((status = nfsd4_decode_bitmap(argp, bmval)))
254 return status;
255
256 /*
257 * According to spec, unsupported attributes return ERR_NOTSUPP;
258 * read-only attributes return ERR_INVAL.
259 */
260 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
261 return nfserr_attrnotsupp;
262 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
263 return nfserr_inval;
264
265 READ_BUF(4);
266 READ32(expected_len);
267
268 if (bmval[0] & FATTR4_WORD0_SIZE) {
269 READ_BUF(8);
270 len += 8;
271 READ64(iattr->ia_size);
272 iattr->ia_valid |= ATTR_SIZE;
273 }
274 if (bmval[0] & FATTR4_WORD0_ACL) {
275 int nace, i;
276 struct nfs4_ace ace;
277
278 READ_BUF(4); len += 4;
279 READ32(nace);
280
281 *acl = nfs4_acl_new();
282 if (*acl == NULL) {
283 status = -ENOMEM;
284 goto out_nfserr;
285 }
286 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
287
288 for (i = 0; i < nace; i++) {
289 READ_BUF(16); len += 16;
290 READ32(ace.type);
291 READ32(ace.flag);
292 READ32(ace.access_mask);
293 READ32(dummy32);
294 READ_BUF(dummy32);
295 len += XDR_QUADLEN(dummy32) << 2;
296 READMEM(buf, dummy32);
297 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
298 status = 0;
299 if (ace.whotype != NFS4_ACL_WHO_NAMED)
300 ace.who = 0;
301 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
302 status = nfsd_map_name_to_gid(argp->rqstp,
303 buf, dummy32, &ace.who);
304 else
305 status = nfsd_map_name_to_uid(argp->rqstp,
306 buf, dummy32, &ace.who);
307 if (status)
308 goto out_nfserr;
b905b7b0
N		 309 status = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
310 ace.access_mask, ace.whotype, ace.who);
311 if (status)
1da177e4 312 goto out_nfserr;
1da177e4
LT		 313 }
314 } else
315 *acl = NULL;
316 if (bmval[1] & FATTR4_WORD1_MODE) {
317 READ_BUF(4);
318 len += 4;
319 READ32(iattr->ia_mode);
320 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
321 iattr->ia_valid |= ATTR_MODE;
322 }
323 if (bmval[1] & FATTR4_WORD1_OWNER) {
324 READ_BUF(4);
325 len += 4;
326 READ32(dummy32);
327 READ_BUF(dummy32);
328 len += (XDR_QUADLEN(dummy32) << 2);
329 READMEM(buf, dummy32);
330 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
331 goto out_nfserr;
332 iattr->ia_valid |= ATTR_UID;
333 }
334 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
335 READ_BUF(4);
336 len += 4;
337 READ32(dummy32);
338 READ_BUF(dummy32);
339 len += (XDR_QUADLEN(dummy32) << 2);
340 READMEM(buf, dummy32);
341 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
342 goto out_nfserr;
343 iattr->ia_valid |= ATTR_GID;
344 }
345 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
346 READ_BUF(4);
347 len += 4;
348 READ32(dummy32);
349 switch (dummy32) {
350 case NFS4_SET_TO_CLIENT_TIME:
351 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
352 all 32 bits of 'nseconds'. */
353 READ_BUF(12);
354 len += 12;
355 READ32(dummy32);
356 if (dummy32)
357 return nfserr_inval;
358 READ32(iattr->ia_atime.tv_sec);
359 READ32(iattr->ia_atime.tv_nsec);
360 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
361 return nfserr_inval;
362 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
363 break;
364 case NFS4_SET_TO_SERVER_TIME:
365 iattr->ia_valid |= ATTR_ATIME;
366 break;
367 default:
368 goto xdr_error;
369 }
370 }
371 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
372 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
373 all 32 bits of 'nseconds'. */
374 READ_BUF(12);
375 len += 12;
376 READ32(dummy32);
377 if (dummy32)
378 return nfserr_inval;
379 READ32(iattr->ia_ctime.tv_sec);
380 READ32(iattr->ia_ctime.tv_nsec);
381 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
382 return nfserr_inval;
383 iattr->ia_valid |= ATTR_CTIME;
384 }
385 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
386 READ_BUF(4);
387 len += 4;
388 READ32(dummy32);
389 switch (dummy32) {
390 case NFS4_SET_TO_CLIENT_TIME:
391 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
392 all 32 bits of 'nseconds'. */
393 READ_BUF(12);
394 len += 12;
395 READ32(dummy32);
396 if (dummy32)
397 return nfserr_inval;
398 READ32(iattr->ia_mtime.tv_sec);
399 READ32(iattr->ia_mtime.tv_nsec);
400 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
401 return nfserr_inval;
402 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
403 break;
404 case NFS4_SET_TO_SERVER_TIME:
405 iattr->ia_valid |= ATTR_MTIME;
406 break;
407 default:
408 goto xdr_error;
409 }
410 }
411 if (len != expected_len)
412 goto xdr_error;
413
414 DECODE_TAIL;
415
416out_nfserr:
417 status = nfserrno(status);
418 goto out;
419}
420
421static int
422nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
423{
424 DECODE_HEAD;
425
426 READ_BUF(4);
427 READ32(access->ac_req_access);
428
429 DECODE_TAIL;
430}
431
432static int
433nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
434{
435 DECODE_HEAD;
436
437 close->cl_stateowner = NULL;
438 READ_BUF(4 + sizeof(stateid_t));
439 READ32(close->cl_seqid);
440 READ32(close->cl_stateid.si_generation);
441 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
442
443 DECODE_TAIL;
444}
445
446
447static int
448nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
449{
450 DECODE_HEAD;
451
452 READ_BUF(12);
453 READ64(commit->co_offset);
454 READ32(commit->co_count);
455
456 DECODE_TAIL;
457}
458
459static int
460nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
461{
462 DECODE_HEAD;
463
464 READ_BUF(4);
465 READ32(create->cr_type);
466 switch (create->cr_type) {
467 case NF4LNK:
468 READ_BUF(4);
469 READ32(create->cr_linklen);
470 READ_BUF(create->cr_linklen);
471 SAVEMEM(create->cr_linkname, create->cr_linklen);
472 break;
473 case NF4BLK:
474 case NF4CHR:
475 READ_BUF(8);
476 READ32(create->cr_specdata1);
477 READ32(create->cr_specdata2);
478 break;
479 case NF4SOCK:
480 case NF4FIFO:
481 case NF4DIR:
482 default:
483 break;
484 }
485
486 READ_BUF(4);
487 READ32(create->cr_namelen);
488 READ_BUF(create->cr_namelen);
489 SAVEMEM(create->cr_name, create->cr_namelen);
490 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
491 return status;
492
493 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
494 goto out;
495
496 DECODE_TAIL;
497}
498
499static inline int
500nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
501{
502 DECODE_HEAD;
503
504 READ_BUF(sizeof(stateid_t));
505 READ32(dr->dr_stateid.si_generation);
506 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
507
508 DECODE_TAIL;
509}
510
511static inline int
512nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
513{
514 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
515}
516
517static int
518nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
519{
520 DECODE_HEAD;
521
522 READ_BUF(4);
523 READ32(link->li_namelen);
524 READ_BUF(link->li_namelen);
525 SAVEMEM(link->li_name, link->li_namelen);
526 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
527 return status;
528
529 DECODE_TAIL;
530}
531
532static int
533nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
534{
535 DECODE_HEAD;
536
3a65588a 537 lock->lk_replay_owner = NULL;
1da177e4
LT		 538 /*
539 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
540 */
541 READ_BUF(28);
542 READ32(lock->lk_type);
543 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
544 goto xdr_error;
545 READ32(lock->lk_reclaim);
546 READ64(lock->lk_offset);
547 READ64(lock->lk_length);
548 READ32(lock->lk_is_new);
549
550 if (lock->lk_is_new) {
551 READ_BUF(36);
552 READ32(lock->lk_new_open_seqid);
553 READ32(lock->lk_new_open_stateid.si_generation);
554
555 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
556 READ32(lock->lk_new_lock_seqid);
557 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
558 READ32(lock->lk_new_owner.len);
559 READ_BUF(lock->lk_new_owner.len);
560 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
561 } else {
562 READ_BUF(20);
563 READ32(lock->lk_old_lock_stateid.si_generation);
564 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
565 READ32(lock->lk_old_lock_seqid);
566 }
567
568 DECODE_TAIL;
569}
570
571static int
572nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
573{
574 DECODE_HEAD;
575
576 READ_BUF(32);
577 READ32(lockt->lt_type);
578 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
579 goto xdr_error;
580 READ64(lockt->lt_offset);
581 READ64(lockt->lt_length);
582 COPYMEM(&lockt->lt_clientid, 8);
583 READ32(lockt->lt_owner.len);
584 READ_BUF(lockt->lt_owner.len);
585 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
586
587 DECODE_TAIL;
588}
589
590static int
591nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
592{
593 DECODE_HEAD;
594
595 locku->lu_stateowner = NULL;
596 READ_BUF(24 + sizeof(stateid_t));
597 READ32(locku->lu_type);
598 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
599 goto xdr_error;
600 READ32(locku->lu_seqid);
601 READ32(locku->lu_stateid.si_generation);
602 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
603 READ64(locku->lu_offset);
604 READ64(locku->lu_length);
605
606 DECODE_TAIL;
607}
608
609static int
610nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
611{
612 DECODE_HEAD;
613
614 READ_BUF(4);
615 READ32(lookup->lo_len);
616 READ_BUF(lookup->lo_len);
617 SAVEMEM(lookup->lo_name, lookup->lo_len);
618 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
619 return status;
620
621 DECODE_TAIL;
622}
623
624static int
625nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
626{
627 DECODE_HEAD;
628
629 memset(open->op_bmval, 0, sizeof(open->op_bmval));
630 open->op_iattr.ia_valid = 0;
631 open->op_stateowner = NULL;
632
633 /* seqid, share_access, share_deny, clientid, ownerlen */
634 READ_BUF(16 + sizeof(clientid_t));
635 READ32(open->op_seqid);
636 READ32(open->op_share_access);
637 READ32(open->op_share_deny);
638 COPYMEM(&open->op_clientid, sizeof(clientid_t));
639 READ32(open->op_owner.len);
640
641 /* owner, open_flag */
642 READ_BUF(open->op_owner.len + 4);
643 SAVEMEM(open->op_owner.data, open->op_owner.len);
644 READ32(open->op_create);
645 switch (open->op_create) {
646 case NFS4_OPEN_NOCREATE:
647 break;
648 case NFS4_OPEN_CREATE:
649 READ_BUF(4);
650 READ32(open->op_createmode);
651 switch (open->op_createmode) {
652 case NFS4_CREATE_UNCHECKED:
653 case NFS4_CREATE_GUARDED:
654 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
655 goto out;
656 break;
657 case NFS4_CREATE_EXCLUSIVE:
658 READ_BUF(8);
659 COPYMEM(open->op_verf.data, 8);
660 break;
661 default:
662 goto xdr_error;
663 }
664 break;
665 default:
666 goto xdr_error;
667 }
668
669 /* open_claim */
670 READ_BUF(4);
671 READ32(open->op_claim_type);
672 switch (open->op_claim_type) {
673 case NFS4_OPEN_CLAIM_NULL:
674 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
675 READ_BUF(4);
676 READ32(open->op_fname.len);
677 READ_BUF(open->op_fname.len);
678 SAVEMEM(open->op_fname.data, open->op_fname.len);
679 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
680 return status;
681 break;
682 case NFS4_OPEN_CLAIM_PREVIOUS:
683 READ_BUF(4);
684 READ32(open->op_delegate_type);
685 break;
686 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
687 READ_BUF(sizeof(stateid_t) + 4);
688 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
689 READ32(open->op_fname.len);
690 READ_BUF(open->op_fname.len);
691 SAVEMEM(open->op_fname.data, open->op_fname.len);
692 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
693 return status;
694 break;
695 default:
696 goto xdr_error;
697 }
698
699 DECODE_TAIL;
700}
701
702static int
703nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
704{
705 DECODE_HEAD;
706
707 open_conf->oc_stateowner = NULL;
708 READ_BUF(4 + sizeof(stateid_t));
709 READ32(open_conf->oc_req_stateid.si_generation);
710 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
711 READ32(open_conf->oc_seqid);
712
713 DECODE_TAIL;
714}
715
716static int
717nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
718{
719 DECODE_HEAD;
720
721 open_down->od_stateowner = NULL;
722 READ_BUF(12 + sizeof(stateid_t));
723 READ32(open_down->od_stateid.si_generation);
724 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
725 READ32(open_down->od_seqid);
726 READ32(open_down->od_share_access);
727 READ32(open_down->od_share_deny);
728
729 DECODE_TAIL;
730}
731
732static int
733nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
734{
735 DECODE_HEAD;
736
737 READ_BUF(4);
738 READ32(putfh->pf_fhlen);
739 if (putfh->pf_fhlen > NFS4_FHSIZE)
740 goto xdr_error;
741 READ_BUF(putfh->pf_fhlen);
742 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
743
744 DECODE_TAIL;
745}
746
747static int
748nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
749{
750 DECODE_HEAD;
751
752 READ_BUF(sizeof(stateid_t) + 12);
753 READ32(read->rd_stateid.si_generation);
754 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
755 READ64(read->rd_offset);
756 READ32(read->rd_length);
757
758 DECODE_TAIL;
759}
760
761static int
762nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
763{
764 DECODE_HEAD;
765
766 READ_BUF(24);
767 READ64(readdir->rd_cookie);
768 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
769 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
770 READ32(readdir->rd_maxcount);
771 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
772 goto out;
773
774 DECODE_TAIL;
775}
776
777static int
778nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
779{
780 DECODE_HEAD;
781
782 READ_BUF(4);
783 READ32(remove->rm_namelen);
784 READ_BUF(remove->rm_namelen);
785 SAVEMEM(remove->rm_name, remove->rm_namelen);
786 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
787 return status;
788
789 DECODE_TAIL;
790}
791
792static int
793nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
794{
795 DECODE_HEAD;
796
797 READ_BUF(4);
798 READ32(rename->rn_snamelen);
799 READ_BUF(rename->rn_snamelen + 4);
800 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
801 READ32(rename->rn_tnamelen);
802 READ_BUF(rename->rn_tnamelen);
803 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
804 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
805 return status;
806 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
807 return status;
808
809 DECODE_TAIL;
810}
811
812static int
813nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
814{
815 DECODE_HEAD;
816
817 READ_BUF(sizeof(clientid_t));
818 COPYMEM(clientid, sizeof(clientid_t));
819
820 DECODE_TAIL;
821}
822
823static int
824nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
825{
826 DECODE_HEAD;
827
828 READ_BUF(sizeof(stateid_t));
829 READ32(setattr->sa_stateid.si_generation);
830 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
831 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
832 goto out;
833
834 DECODE_TAIL;
835}
836
837static int
838nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
839{
840 DECODE_HEAD;
841
842 READ_BUF(12);
843 COPYMEM(setclientid->se_verf.data, 8);
844 READ32(setclientid->se_namelen);
845
846 READ_BUF(setclientid->se_namelen + 8);
847 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
848 READ32(setclientid->se_callback_prog);
849 READ32(setclientid->se_callback_netid_len);
850
851 READ_BUF(setclientid->se_callback_netid_len + 4);
852 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
853 READ32(setclientid->se_callback_addr_len);
854
855 READ_BUF(setclientid->se_callback_addr_len + 4);
856 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
857 READ32(setclientid->se_callback_ident);
858
859 DECODE_TAIL;
860}
861
862static int
863nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
864{
865 DECODE_HEAD;
866
867 READ_BUF(8 + sizeof(nfs4_verifier));
868 COPYMEM(&scd_c->sc_clientid, 8);
869 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
870
871 DECODE_TAIL;
872}
873
874/* Also used for NVERIFY */
875static int
876nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
877{
878#if 0
879 struct nfsd4_compoundargs save = {
880 .p = argp->p,
881 .end = argp->end,
882 .rqstp = argp->rqstp,
883 };
884 u32 ve_bmval[2];
885 struct iattr ve_iattr; /* request */
886 struct nfs4_acl *ve_acl; /* request */
887#endif
888 DECODE_HEAD;
889
890 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
891 goto out;
892
893 /* For convenience's sake, we compare raw xdr'd attributes in
894 * nfsd4_proc_verify; however we still decode here just to return
895 * correct error in case of bad xdr. */
896#if 0
897 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
898 if (status == nfserr_inval) {
899 status = nfserrno(status);
900 goto out;
901 }
902#endif
903 READ_BUF(4);
904 READ32(verify->ve_attrlen);
905 READ_BUF(verify->ve_attrlen);
906 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
907
908 DECODE_TAIL;
909}
910
911static int
912nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
913{
914 int avail;
915 int v;
916 int len;
917 DECODE_HEAD;
918
919 READ_BUF(sizeof(stateid_opaque_t) + 20);
920 READ32(write->wr_stateid.si_generation);
921 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
922 READ64(write->wr_offset);
923 READ32(write->wr_stable_how);
924 if (write->wr_stable_how > 2)
925 goto xdr_error;
926 READ32(write->wr_buflen);
927
928 /* Sorry .. no magic macros for this.. *
929 * READ_BUF(write->wr_buflen);
930 * SAVEMEM(write->wr_buf, write->wr_buflen);
931 */
932 avail = (char*)argp->end - (char*)argp->p;
933 if (avail + argp->pagelen < write->wr_buflen) {
934 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
935 goto xdr_error;
936 }
3cc03b16
N		 937 argp->rqstp->rq_vec[0].iov_base = p;
938 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 939 v = 0;
940 len = write->wr_buflen;
3cc03b16
N		 941 while (len > argp->rqstp->rq_vec[v].iov_len) {
942 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 943 v++;
3cc03b16 944 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 945 argp->pagelist++;
946 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 947 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 948 argp->pagelen -= PAGE_SIZE;
949 } else {
3cc03b16 950 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 951 argp->pagelen -= len;
952 }
953 }
2ebbc012
AV		 954 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
955 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 956 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 957 write->wr_vlen = v+1;
958
959 DECODE_TAIL;
960}
961
962static int
963nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
964{
965 DECODE_HEAD;
966
967 READ_BUF(12);
968 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
969 READ32(rlockowner->rl_owner.len);
970 READ_BUF(rlockowner->rl_owner.len);
971 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
972
973 DECODE_TAIL;
974}
975
976static int
977nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
978{
979 DECODE_HEAD;
980 struct nfsd4_op *op;
981 int i;
982
983 /*
984 * XXX: According to spec, we should check the tag
985 * for UTF-8 compliance. I'm postponing this for
986 * now because it seems that some clients do use
987 * binary tags.
988 */
989 READ_BUF(4);
990 READ32(argp->taglen);
991 READ_BUF(argp->taglen + 8);
992 SAVEMEM(argp->tag, argp->taglen);
993 READ32(argp->minorversion);
994 READ32(argp->opcnt);
995
996 if (argp->taglen > NFSD4_MAX_TAGLEN)
997 goto xdr_error;
998 if (argp->opcnt > 100)
999 goto xdr_error;
1000
e8c96f8c 1001 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1002 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1003 if (!argp->ops) {
1004 argp->ops = argp->iops;
1005 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1006 goto xdr_error;
1007 }
1008 }
1009
1010 for (i = 0; i < argp->opcnt; i++) {
1011 op = &argp->ops[i];
1012 op->replay = NULL;
1013
1014 /*
1015 * We can't use READ_BUF() here because we need to handle
1016 * a missing opcode as an OP_WRITE + 1. So we need to check
1017 * to see if we're truly at the end of our buffer or if there
1018 * is another page we need to flip to.
1019 */
1020
1021 if (argp->p == argp->end) {
1022 if (argp->pagelen < 4) {
1023 /* There isn't an opcode still on the wire */
1024 op->opnum = OP_WRITE + 1;
1025 op->status = nfserr_bad_xdr;
1026 argp->opcnt = i+1;
1027 break;
1028 }
1029
1030 /*
1031 * False alarm. We just hit a page boundary, but there
1032 * is still data available. Move pointer across page
1033 * boundary. *snip from READ_BUF*
1034 */
1035 argp->p = page_address(argp->pagelist[0]);
1036 argp->pagelist++;
1037 if (argp->pagelen < PAGE_SIZE) {
1038 argp->end = p + (argp->pagelen>>2);
1039 argp->pagelen = 0;
1040 } else {
1041 argp->end = p + (PAGE_SIZE>>2);
1042 argp->pagelen -= PAGE_SIZE;
1043 }
1044 }
1045 op->opnum = ntohl(*argp->p++);
1046
1047 switch (op->opnum) {
1048 case 2: /* Reserved operation */
1049 op->opnum = OP_ILLEGAL;
1050 if (argp->minorversion == 0)
1051 op->status = nfserr_op_illegal;
1052 else
1053 op->status = nfserr_minor_vers_mismatch;
1054 break;
1055 case OP_ACCESS:
1056 op->status = nfsd4_decode_access(argp, &op->u.access);
1057 break;
1058 case OP_CLOSE:
1059 op->status = nfsd4_decode_close(argp, &op->u.close);
1060 break;
1061 case OP_COMMIT:
1062 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1063 break;
1064 case OP_CREATE:
1065 op->status = nfsd4_decode_create(argp, &op->u.create);
1066 break;
1067 case OP_DELEGRETURN:
1068 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1069 break;
1070 case OP_GETATTR:
1071 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1072 break;
1073 case OP_GETFH:
1074 op->status = nfs_ok;
1075 break;
1076 case OP_LINK:
1077 op->status = nfsd4_decode_link(argp, &op->u.link);
1078 break;
1079 case OP_LOCK:
1080 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1081 break;
1082 case OP_LOCKT:
1083 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1084 break;
1085 case OP_LOCKU:
1086 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1087 break;
1088 case OP_LOOKUP:
1089 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1090 break;
1091 case OP_LOOKUPP:
1092 op->status = nfs_ok;
1093 break;
1094 case OP_NVERIFY:
1095 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1096 break;
1097 case OP_OPEN:
1098 op->status = nfsd4_decode_open(argp, &op->u.open);
1099 break;
1100 case OP_OPEN_CONFIRM:
1101 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1102 break;
1103 case OP_OPEN_DOWNGRADE:
1104 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1105 break;
1106 case OP_PUTFH:
1107 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1108 break;
1109 case OP_PUTROOTFH:
1110 op->status = nfs_ok;
1111 break;
1112 case OP_READ:
1113 op->status = nfsd4_decode_read(argp, &op->u.read);
1114 break;
1115 case OP_READDIR:
1116 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1117 break;
1118 case OP_READLINK:
1119 op->status = nfs_ok;
1120 break;
1121 case OP_REMOVE:
1122 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1123 break;
1124 case OP_RENAME:
1125 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1126 break;
1127 case OP_RESTOREFH:
1128 op->status = nfs_ok;
1129 break;
1130 case OP_RENEW:
1131 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1132 break;
1133 case OP_SAVEFH:
1134 op->status = nfs_ok;
1135 break;
1136 case OP_SETATTR:
1137 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1138 break;
1139 case OP_SETCLIENTID:
1140 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1141 break;
1142 case OP_SETCLIENTID_CONFIRM:
1143 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1144 break;
1145 case OP_VERIFY:
1146 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1147 break;
1148 case OP_WRITE:
1149 op->status = nfsd4_decode_write(argp, &op->u.write);
1150 break;
1151 case OP_RELEASE_LOCKOWNER:
1152 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1153 break;
1154 default:
1155 op->opnum = OP_ILLEGAL;
1156 op->status = nfserr_op_illegal;
1157 break;
1158 }
1159
1160 if (op->status) {
1161 argp->opcnt = i+1;
1162 break;
1163 }
1164 }
1165
1166 DECODE_TAIL;
1167}
1168/*
1169 * END OF "GENERIC" DECODE ROUTINES.
1170 */
1171
1172/*
1173 * START OF "GENERIC" ENCODE ROUTINES.
1174 * These may look a little ugly since they are imported from a "generic"
1175 * set of XDR encode/decode routines which are intended to be shared by
1176 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1177 *
1178 * If the pain of reading these is too great, it should be a straightforward
1179 * task to translate them into Linux-specific versions which are more
1180 * consistent with the style used in NFSv2/v3...
1181 */
2ebbc012 1182#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1183
1184#define WRITE32(n) *p++ = htonl(n)
1185#define WRITE64(n) do { \
1186 *p++ = htonl((u32)((n) >> 32)); \
1187 *p++ = htonl((u32)(n)); \
1188} while (0)
1189#define WRITEMEM(ptr,nbytes) do { \
1190 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1191 memcpy(p, ptr, nbytes); \
1192 p += XDR_QUADLEN(nbytes); \
1193} while (0)
1194#define WRITECINFO(c) do { \
1195 *p++ = htonl(c.atomic); \
1196 *p++ = htonl(c.before_ctime_sec); \
1197 *p++ = htonl(c.before_ctime_nsec); \
1198 *p++ = htonl(c.after_ctime_sec); \
1199 *p++ = htonl(c.after_ctime_nsec); \
1200} while (0)
1201
1202#define RESERVE_SPACE(nbytes) do { \
1203 p = resp->p; \
1204 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1205} while (0)
1206#define ADJUST_ARGS() resp->p = p
1207
1208/*
1209 * Header routine to setup seqid operation replay cache
1210 */
1211#define ENCODE_SEQID_OP_HEAD \
2ebbc012
AV		 1212 __be32 *p; \
1213 __be32 *save; \
1da177e4
LT		 1214 \
1215 save = resp->p;
1216
1217/*
7fb64cee
N		 1218 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1219 * is where sequence id's are incremented, and the replay cache is filled.
1220 * Note that we increment sequence id's here, at the last moment, so we're sure
1221 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1222 */
1223
1224#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1225 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1226 stateowner->so_seqid++; \
1da177e4
LT		 1227 stateowner->so_replay.rp_status = nfserr; \
1228 stateowner->so_replay.rp_buflen = \
1229 (((char *)(resp)->p - (char *)save)); \
1230 memcpy(stateowner->so_replay.rp_buf, save, \
1231 stateowner->so_replay.rp_buflen); \
1232 } } while (0);
1233
81c3f413
BF		 1234/* Encode as an array of strings the string given with components
1235 * seperated @sep.
1236 */
1237static int nfsd4_encode_components(char sep, char *components,
2ebbc012 1238 __be32 **pp, int *buflen)
81c3f413 1239{
2ebbc012
AV		 1240 __be32 *p = *pp;
1241 __be32 *countp = p;
81c3f413
BF		 1242 int strlen, count=0;
1243 char *str, *end;
1244
1245 dprintk("nfsd4_encode_components(%s)\n", components);
1246 if ((*buflen -= 4) < 0)
1247 return nfserr_resource;
1248 WRITE32(0); /* We will fill this in with @count later */
1249 end = str = components;
1250 while (*end) {
1251 for (; *end && (*end != sep); end++)
1252 ; /* Point to end of component */
1253 strlen = end - str;
1254 if (strlen) {
1255 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1256 return nfserr_resource;
1257 WRITE32(strlen);
1258 WRITEMEM(str, strlen);
1259 count++;
1260 }
1261 else
1262 end++;
1263 str = end;
1264 }
1265 *pp = p;
1266 p = countp;
1267 WRITE32(count);
1268 return 0;
1269}
1270
1271/*
1272 * encode a location element of a fs_locations structure
1273 */
1274static int nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1275 __be32 **pp, int *buflen)
81c3f413
BF		 1276{
1277 int status;
2ebbc012 1278 __be32 *p = *pp;
81c3f413
BF		 1279
1280 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1281 if (status)
1282 return status;
1283 status = nfsd4_encode_components('/', location->path, &p, buflen);
1284 if (status)
1285 return status;
1286 *pp = p;
1287 return 0;
1288}
1289
1290/*
1291 * Return the path to an export point in the pseudo filesystem namespace
1292 * Returned string is safe to use as long as the caller holds a reference
1293 * to @exp.
1294 */
cc45f017 1295static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, u32 *stat)
81c3f413
BF		 1296{
1297 struct svc_fh tmp_fh;
1298 char *path, *rootpath;
81c3f413
BF		 1299
1300 fh_init(&tmp_fh, NFS4_FHSIZE);
cc45f017
AV		 1301 *stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
1302 if (*stat)
1303 return NULL;
81c3f413
BF		 1304 rootpath = tmp_fh.fh_export->ex_path;
1305
1306 path = exp->ex_path;
1307
1308 if (strncmp(path, rootpath, strlen(rootpath))) {
1309 printk("nfsd: fs_locations failed;"
1310 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1311 *stat = nfserr_notsupp;
1312 return NULL;
81c3f413
BF		 1313 }
1314
1315 return path + strlen(rootpath);
1316}
1317
1318/*
1319 * encode a fs_locations structure
1320 */
1321static int nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1322 struct svc_export *exp,
2ebbc012 1323 __be32 **pp, int *buflen)
81c3f413 1324{
cc45f017
AV		 1325 u32 status;
1326 int i;
2ebbc012 1327 __be32 *p = *pp;
81c3f413 1328 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1329 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1330
cc45f017
AV		 1331 if (status)
1332 return status;
81c3f413
BF		 1333 status = nfsd4_encode_components('/', root, &p, buflen);
1334 if (status)
1335 return status;
1336 if ((*buflen -= 4) < 0)
1337 return nfserr_resource;
1338 WRITE32(fslocs->locations_count);
1339 for (i=0; i<fslocs->locations_count; i++) {
1340 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1341 &p, buflen);
1342 if (status)
1343 return status;
1344 }
1345 *pp = p;
1346 return 0;
1347}
1da177e4
LT		 1348
1349static u32 nfs4_ftypes[16] = {
1350 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1351 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1352 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1353 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1354};
1355
1356static int
1357nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1358 __be32 **p, int *buflen)
1da177e4
LT		 1359{
1360 int status;
1361
1362 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1363 return nfserr_resource;
1364 if (whotype != NFS4_ACL_WHO_NAMED)
1365 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1366 else if (group)
1367 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1368 else
1369 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1370 if (status < 0)
1371 return nfserrno(status);
1372 *p = xdr_encode_opaque(*p, NULL, status);
1373 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1374 BUG_ON(*buflen < 0);
1375 return 0;
1376}
1377
1378static inline int
2ebbc012 1379nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1380{
1381 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1382}
1383
1384static inline int
2ebbc012 1385nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1386{
1387 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1388}
1389
1390static inline int
1391nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1392 __be32 **p, int *buflen)
1da177e4
LT		 1393{
1394 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1395}
1396
42ca0993
BF		 1397#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1398 FATTR4_WORD0_RDATTR_ERROR)
1399#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1400
1401static int fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1402{
1403 /* As per referral draft: */
1404 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1405 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1406 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1407 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1408 *rdattr_err = NFSERR_MOVED;
1409 else
1410 return nfserr_moved;
1411 }
1412 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1413 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1414 return 0;
1415}
1da177e4
LT		 1416
1417/*
1418 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1419 * ourselves.
1420 *
1421 * @countp is the buffer size in _words_; upon successful return this becomes
1422 * replaced with the number of words written.
1423 */
1424int
1425nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1426 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1da177e4
LT		 1427 struct svc_rqst *rqstp)
1428{
1429 u32 bmval0 = bmval[0];
1430 u32 bmval1 = bmval[1];
1431 struct kstat stat;
1432 struct svc_fh tempfh;
1433 struct kstatfs statfs;
1434 int buflen = *countp << 2;
2ebbc012 1435 __be32 *attrlenp;
1da177e4
LT		 1436 u32 dummy;
1437 u64 dummy64;
42ca0993 1438 u32 rdattr_err = 0;
2ebbc012 1439 __be32 *p = buffer;
1da177e4
LT		 1440 int status;
1441 int aclsupport = 0;
1442 struct nfs4_acl *acl = NULL;
1443
1444 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1445 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1446 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1447
42ca0993
BF		 1448 if (exp->ex_fslocs.migrated) {
1449 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1450 if (status)
1451 goto out;
1452 }
1453
1da177e4
LT		 1454 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1455 if (status)
1456 goto out_nfserr;
1457 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1458 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1459 FATTR4_WORD1_SPACE_TOTAL))) {
726c3342 1460 status = vfs_statfs(dentry, &statfs);
1da177e4
LT		 1461 if (status)
1462 goto out_nfserr;
1463 }
1464 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1465 fh_init(&tempfh, NFS4_FHSIZE);
1466 status = fh_compose(&tempfh, exp, dentry, NULL);
1467 if (status)
1468 goto out;
1469 fhp = &tempfh;
1470 }
1471 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1472 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1473 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1474 aclsupport = (status == 0);
1475 if (bmval0 & FATTR4_WORD0_ACL) {
1476 if (status == -EOPNOTSUPP)
1477 bmval0 &= ~FATTR4_WORD0_ACL;
1478 else if (status == -EINVAL) {
1479 status = nfserr_attrnotsupp;
1480 goto out;
1481 } else if (status != 0)
1482 goto out_nfserr;
1483 }
1484 }
81c3f413
BF		 1485 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1486 if (exp->ex_fslocs.locations == NULL) {
1487 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1488 }
1489 }
1da177e4
LT		 1490 if ((buflen -= 16) < 0)
1491 goto out_resource;
1492
1493 WRITE32(2);
1494 WRITE32(bmval0);
1495 WRITE32(bmval1);
1496 attrlenp = p++; /* to be backfilled later */
1497
1498 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1499 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1500 if ((buflen -= 12) < 0)
1501 goto out_resource;
42ca0993
BF		 1502 if (!aclsupport)
1503 word0 &= ~FATTR4_WORD0_ACL;
1504 if (!exp->ex_fslocs.locations)
1505 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1506 WRITE32(2);
42ca0993 1507 WRITE32(word0);
1da177e4
LT		 1508 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1509 }
1510 if (bmval0 & FATTR4_WORD0_TYPE) {
1511 if ((buflen -= 4) < 0)
1512 goto out_resource;
1513 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1514 if (dummy == NF4BAD)
1515 goto out_serverfault;
1516 WRITE32(dummy);
1517 }
1518 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1519 if ((buflen -= 4) < 0)
1520 goto out_resource;
49640001 1521 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1522 WRITE32(NFS4_FH_PERSISTENT);
49640001 1523 else
e34ac862 1524 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1525 }
1526 if (bmval0 & FATTR4_WORD0_CHANGE) {
1527 /*
1528 * Note: This _must_ be consistent with the scheme for writing
1529 * change_info, so any changes made here must be reflected there
1530 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1531 * macro above.)
1532 */
1533 if ((buflen -= 8) < 0)
1534 goto out_resource;
1535 WRITE32(stat.ctime.tv_sec);
1536 WRITE32(stat.ctime.tv_nsec);
1537 }
1538 if (bmval0 & FATTR4_WORD0_SIZE) {
1539 if ((buflen -= 8) < 0)
1540 goto out_resource;
1541 WRITE64(stat.size);
1542 }
1543 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1544 if ((buflen -= 4) < 0)
1545 goto out_resource;
1546 WRITE32(1);
1547 }
1548 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1549 if ((buflen -= 4) < 0)
1550 goto out_resource;
1551 WRITE32(1);
1552 }
1553 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1554 if ((buflen -= 4) < 0)
1555 goto out_resource;
1556 WRITE32(0);
1557 }
1558 if (bmval0 & FATTR4_WORD0_FSID) {
1559 if ((buflen -= 16) < 0)
1560 goto out_resource;
42ca0993
BF		 1561 if (exp->ex_fslocs.migrated) {
1562 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1563 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1564 } else if (is_fsid(fhp, rqstp->rq_reffh)) {
1da177e4
LT		 1565 WRITE64((u64)exp->ex_fsid);
1566 WRITE64((u64)0);
1567 } else {
1568 WRITE32(0);
1569 WRITE32(MAJOR(stat.dev));
1570 WRITE32(0);
1571 WRITE32(MINOR(stat.dev));
1572 }
1573 }
1574 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1575 if ((buflen -= 4) < 0)
1576 goto out_resource;
1577 WRITE32(0);
1578 }
1579 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1580 if ((buflen -= 4) < 0)
1581 goto out_resource;
1582 WRITE32(NFSD_LEASE_TIME);
1583 }
1584 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1585 if ((buflen -= 4) < 0)
1586 goto out_resource;
42ca0993 1587 WRITE32(rdattr_err);
1da177e4
LT		 1588 }
1589 if (bmval0 & FATTR4_WORD0_ACL) {
1590 struct nfs4_ace *ace;
1591 struct list_head *h;
1592
1593 if (acl == NULL) {
1594 if ((buflen -= 4) < 0)
1595 goto out_resource;
1596
1597 WRITE32(0);
1598 goto out_acl;
1599 }
1600 if ((buflen -= 4) < 0)
1601 goto out_resource;
1602 WRITE32(acl->naces);
1603
1604 list_for_each(h, &acl->ace_head) {
1605 ace = list_entry(h, struct nfs4_ace, l_ace);
1606
1607 if ((buflen -= 4*3) < 0)
1608 goto out_resource;
1609 WRITE32(ace->type);
1610 WRITE32(ace->flag);
1611 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1612 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1613 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1614 &p, &buflen);
1615 if (status == nfserr_resource)
1616 goto out_resource;
1617 if (status)
1618 goto out;
1619 }
1620 }
1621out_acl:
1622 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1623 if ((buflen -= 4) < 0)
1624 goto out_resource;
1625 WRITE32(aclsupport ?
1626 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1627 }
1628 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1629 if ((buflen -= 4) < 0)
1630 goto out_resource;
1631 WRITE32(1);
1632 }
1633 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1634 if ((buflen -= 4) < 0)
1635 goto out_resource;
1636 WRITE32(1);
1637 }
1638 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1639 if ((buflen -= 4) < 0)
1640 goto out_resource;
1641 WRITE32(1);
1642 }
1643 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1644 if ((buflen -= 4) < 0)
1645 goto out_resource;
1646 WRITE32(1);
1647 }
1648 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1649 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1650 if (buflen < 0)
1651 goto out_resource;
1652 WRITE32(fhp->fh_handle.fh_size);
1653 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1654 }
1655 if (bmval0 & FATTR4_WORD0_FILEID) {
1656 if ((buflen -= 8) < 0)
1657 goto out_resource;
1658 WRITE64((u64) stat.ino);
1659 }
1660 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1661 if ((buflen -= 8) < 0)
1662 goto out_resource;
1663 WRITE64((u64) statfs.f_ffree);
1664 }
1665 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1666 if ((buflen -= 8) < 0)
1667 goto out_resource;
1668 WRITE64((u64) statfs.f_ffree);
1669 }
1670 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1671 if ((buflen -= 8) < 0)
1672 goto out_resource;
1673 WRITE64((u64) statfs.f_files);
1674 }
81c3f413
BF		 1675 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1676 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1677 if (status == nfserr_resource)
1678 goto out_resource;
1679 if (status)
1680 goto out;
1681 }
1da177e4
LT		 1682 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1683 if ((buflen -= 4) < 0)
1684 goto out_resource;
1685 WRITE32(1);
1686 }
1687 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1688 if ((buflen -= 8) < 0)
1689 goto out_resource;
1690 WRITE64(~(u64)0);
1691 }
1692 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1693 if ((buflen -= 4) < 0)
1694 goto out_resource;
1695 WRITE32(255);
1696 }
1697 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1698 if ((buflen -= 4) < 0)
1699 goto out_resource;
1700 WRITE32(~(u32) 0);
1701 }
1702 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1703 if ((buflen -= 8) < 0)
1704 goto out_resource;
7adae489 1705 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1706 }
1707 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1708 if ((buflen -= 8) < 0)
1709 goto out_resource;
7adae489 1710 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1711 }
1712 if (bmval1 & FATTR4_WORD1_MODE) {
1713 if ((buflen -= 4) < 0)
1714 goto out_resource;
1715 WRITE32(stat.mode & S_IALLUGO);
1716 }
1717 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1718 if ((buflen -= 4) < 0)
1719 goto out_resource;
1720 WRITE32(1);
1721 }
1722 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1723 if ((buflen -= 4) < 0)
1724 goto out_resource;
1725 WRITE32(stat.nlink);
1726 }
1727 if (bmval1 & FATTR4_WORD1_OWNER) {
1728 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1729 if (status == nfserr_resource)
1730 goto out_resource;
1731 if (status)
1732 goto out;
1733 }
1734 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1735 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1736 if (status == nfserr_resource)
1737 goto out_resource;
1738 if (status)
1739 goto out;
1740 }
1741 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1742 if ((buflen -= 8) < 0)
1743 goto out_resource;
1744 WRITE32((u32) MAJOR(stat.rdev));
1745 WRITE32((u32) MINOR(stat.rdev));
1746 }
1747 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1748 if ((buflen -= 8) < 0)
1749 goto out_resource;
1750 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1751 WRITE64(dummy64);
1752 }
1753 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1754 if ((buflen -= 8) < 0)
1755 goto out_resource;
1756 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1757 WRITE64(dummy64);
1758 }
1759 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1760 if ((buflen -= 8) < 0)
1761 goto out_resource;
1762 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1763 WRITE64(dummy64);
1764 }
1765 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1766 if ((buflen -= 8) < 0)
1767 goto out_resource;
1768 dummy64 = (u64)stat.blocks << 9;
1769 WRITE64(dummy64);
1770 }
1771 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1772 if ((buflen -= 12) < 0)
1773 goto out_resource;
1774 WRITE32(0);
1775 WRITE32(stat.atime.tv_sec);
1776 WRITE32(stat.atime.tv_nsec);
1777 }
1778 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1779 if ((buflen -= 12) < 0)
1780 goto out_resource;
1781 WRITE32(0);
1782 WRITE32(1);
1783 WRITE32(0);
1784 }
1785 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1786 if ((buflen -= 12) < 0)
1787 goto out_resource;
1788 WRITE32(0);
1789 WRITE32(stat.ctime.tv_sec);
1790 WRITE32(stat.ctime.tv_nsec);
1791 }
1792 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1793 if ((buflen -= 12) < 0)
1794 goto out_resource;
1795 WRITE32(0);
1796 WRITE32(stat.mtime.tv_sec);
1797 WRITE32(stat.mtime.tv_nsec);
1798 }
1799 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1800 struct dentry *mnt_pnt, *mnt_root;
1801
1802 if ((buflen -= 8) < 0)
1803 goto out_resource;
1804 mnt_root = exp->ex_mnt->mnt_root;
1805 if (mnt_root->d_inode == dentry->d_inode) {
1806 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1807 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1808 } else
1809 WRITE64((u64) stat.ino);
1810 }
1811 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1812 *countp = p - buffer;
1813 status = nfs_ok;
1814
1815out:
1816 nfs4_acl_free(acl);
1817 if (fhp == &tempfh)
1818 fh_put(&tempfh);
1819 return status;
1820out_nfserr:
1821 status = nfserrno(status);
1822 goto out;
1823out_resource:
1824 *countp = 0;
1825 status = nfserr_resource;
1826 goto out;
1827out_serverfault:
1828 status = nfserr_serverfault;
1829 goto out;
1830}
1831
1832static int
1833nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 1834 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 1835{
1836 struct svc_export *exp = cd->rd_fhp->fh_export;
1837 struct dentry *dentry;
1838 int nfserr;
1839
1840 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1841 if (IS_ERR(dentry))
1842 return nfserrno(PTR_ERR(dentry));
1843
1844 exp_get(exp);
1845 if (d_mountpoint(dentry)) {
1846 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1847 /*
1848 * -EAGAIN is the only error returned from
1849 * nfsd_cross_mnt() and it indicates that an
1850 * up-call has been initiated to fill in the export
1851 * options on exp. When the answer comes back,
1852 * this call will be retried.
1853 */
1854 nfserr = nfserr_dropit;
1855 goto out_put;
1856 }
1857
1858 }
1859 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1860 cd->rd_rqstp);
1861out_put:
1862 dput(dentry);
1863 exp_put(exp);
1864 return nfserr;
1865}
1866
2ebbc012
AV		 1867static __be32 *
1868nfsd4_encode_rdattr_error(__be32 *p, int buflen, int nfserr)
1da177e4 1869{
2ebbc012 1870 __be32 *attrlenp;
1da177e4
LT		 1871
1872 if (buflen < 6)
1873 return NULL;
1874 *p++ = htonl(2);
1875 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1876 *p++ = htonl(0); /* bmval1 */
1877
1878 attrlenp = p++;
1879 *p++ = nfserr; /* no htonl */
1880 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1881 return p;
1882}
1883
1884static int
1885nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1886 loff_t offset, ino_t ino, unsigned int d_type)
1887{
1888 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1889 int buflen;
2ebbc012 1890 __be32 *p = cd->buffer;
1da177e4
LT		 1891 int nfserr = nfserr_toosmall;
1892
1893 /* In nfsv4, "." and ".." never make it onto the wire.. */
1894 if (name && isdotent(name, namlen)) {
1895 cd->common.err = nfs_ok;
1896 return 0;
1897 }
1898
1899 if (cd->offset)
1900 xdr_encode_hyper(cd->offset, (u64) offset);
1901
1902 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1903 if (buflen < 0)
1904 goto fail;
1905
1906 *p++ = xdr_one; /* mark entry present */
1907 cd->offset = p; /* remember pointer */
1908 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1909 p = xdr_encode_array(p, name, namlen); /* name length & name */
1910
1911 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1912 switch (nfserr) {
1913 case nfs_ok:
1914 p += buflen;
1915 break;
1916 case nfserr_resource:
1917 nfserr = nfserr_toosmall;
1918 goto fail;
1919 case nfserr_dropit:
1920 goto fail;
1921 default:
1922 /*
1923 * If the client requested the RDATTR_ERROR attribute,
1924 * we stuff the error code into this attribute
1925 * and continue. If this attribute was not requested,
1926 * then in accordance with the spec, we fail the
1927 * entire READDIR operation(!)
1928 */
1929 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1930 goto fail;
1da177e4 1931 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 1932 if (p == NULL) {
1933 nfserr = nfserr_toosmall;
1da177e4 1934 goto fail;
34081efc 1935 }
1da177e4
LT		 1936 }
1937 cd->buflen -= (p - cd->buffer);
1938 cd->buffer = p;
1939 cd->common.err = nfs_ok;
1940 return 0;
1941fail:
1942 cd->common.err = nfserr;
1943 return -EINVAL;
1944}
1945
1946static void
1947nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1948{
1949 ENCODE_HEAD;
1950
1951 if (!nfserr) {
1952 RESERVE_SPACE(8);
1953 WRITE32(access->ac_supported);
1954 WRITE32(access->ac_resp_access);
1955 ADJUST_ARGS();
1956 }
1957}
1958
1959static void
1960nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1961{
1962 ENCODE_SEQID_OP_HEAD;
1963
1964 if (!nfserr) {
1965 RESERVE_SPACE(sizeof(stateid_t));
1966 WRITE32(close->cl_stateid.si_generation);
1967 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1968 ADJUST_ARGS();
1969 }
1970 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1971}
1972
1973
1974static void
1975nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1976{
1977 ENCODE_HEAD;
1978
1979 if (!nfserr) {
1980 RESERVE_SPACE(8);
1981 WRITEMEM(commit->co_verf.data, 8);
1982 ADJUST_ARGS();
1983 }
1984}
1985
1986static void
1987nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1988{
1989 ENCODE_HEAD;
1990
1991 if (!nfserr) {
1992 RESERVE_SPACE(32);
1993 WRITECINFO(create->cr_cinfo);
1994 WRITE32(2);
1995 WRITE32(create->cr_bmval[0]);
1996 WRITE32(create->cr_bmval[1]);
1997 ADJUST_ARGS();
1998 }
1999}
2000
2001static int
2002nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
2003{
2004 struct svc_fh *fhp = getattr->ga_fhp;
2005 int buflen;
2006
2007 if (nfserr)
2008 return nfserr;
2009
2010 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2011 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2012 resp->p, &buflen, getattr->ga_bmval,
2013 resp->rqstp);
1da177e4
LT		 2014 if (!nfserr)
2015 resp->p += buflen;
2016 return nfserr;
2017}
2018
2019static void
2020nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
2021{
2022 unsigned int len;
2023 ENCODE_HEAD;
2024
2025 if (!nfserr) {
2026 len = fhp->fh_handle.fh_size;
2027 RESERVE_SPACE(len + 4);
2028 WRITE32(len);
2029 WRITEMEM(&fhp->fh_handle.fh_base, len);
2030 ADJUST_ARGS();
2031 }
2032}
2033
2034/*
2035* Including all fields other than the name, a LOCK4denied structure requires
2036* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2037*/
2038static void
2039nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2040{
2041 ENCODE_HEAD;
2042
2043 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2044 WRITE64(ld->ld_start);
2045 WRITE64(ld->ld_length);
2046 WRITE32(ld->ld_type);
2047 if (ld->ld_sop) {
2048 WRITEMEM(&ld->ld_clientid, 8);
2049 WRITE32(ld->ld_sop->so_owner.len);
2050 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2051 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2052 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2053 WRITE64((u64)0); /* clientid */
2054 WRITE32(0); /* length of owner name */
2055 }
2056 ADJUST_ARGS();
2057}
2058
2059static void
2060nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
2061{
1da177e4
LT		 2062 ENCODE_SEQID_OP_HEAD;
2063
2064 if (!nfserr) {
2065 RESERVE_SPACE(4 + sizeof(stateid_t));
2066 WRITE32(lock->lk_resp_stateid.si_generation);
2067 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2068 ADJUST_ARGS();
2069 } else if (nfserr == nfserr_denied)
2070 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2071
3a65588a 2072 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1da177e4
LT		 2073}
2074
2075static void
2076nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
2077{
2078 if (nfserr == nfserr_denied)
2079 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2080}
2081
2082static void
2083nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
2084{
2085 ENCODE_SEQID_OP_HEAD;
2086
2087 if (!nfserr) {
2088 RESERVE_SPACE(sizeof(stateid_t));
2089 WRITE32(locku->lu_stateid.si_generation);
2090 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2091 ADJUST_ARGS();
2092 }
2093
2094 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2095}
2096
2097
2098static void
2099nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
2100{
2101 ENCODE_HEAD;
2102
2103 if (!nfserr) {
2104 RESERVE_SPACE(20);
2105 WRITECINFO(link->li_cinfo);
2106 ADJUST_ARGS();
2107 }
2108}
2109
2110
2111static void
2112nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
2113{
2114 ENCODE_SEQID_OP_HEAD;
2115
2116 if (nfserr)
2117 goto out;
2118
2119 RESERVE_SPACE(36 + sizeof(stateid_t));
2120 WRITE32(open->op_stateid.si_generation);
2121 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2122 WRITECINFO(open->op_cinfo);
2123 WRITE32(open->op_rflags);
2124 WRITE32(2);
2125 WRITE32(open->op_bmval[0]);
2126 WRITE32(open->op_bmval[1]);
2127 WRITE32(open->op_delegate_type);
2128 ADJUST_ARGS();
2129
2130 switch (open->op_delegate_type) {
2131 case NFS4_OPEN_DELEGATE_NONE:
2132 break;
2133 case NFS4_OPEN_DELEGATE_READ:
2134 RESERVE_SPACE(20 + sizeof(stateid_t));
2135 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
7b190fec 2136 WRITE32(open->op_recall);
1da177e4
LT		 2137
2138 /*
2139 * TODO: ACE's in delegations
2140 */
2141 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2142 WRITE32(0);
2143 WRITE32(0);
2144 WRITE32(0); /* XXX: is NULL principal ok? */
2145 ADJUST_ARGS();
2146 break;
2147 case NFS4_OPEN_DELEGATE_WRITE:
2148 RESERVE_SPACE(32 + sizeof(stateid_t));
2149 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2150 WRITE32(0);
2151
2152 /*
2153 * TODO: space_limit's in delegations
2154 */
2155 WRITE32(NFS4_LIMIT_SIZE);
2156 WRITE32(~(u32)0);
2157 WRITE32(~(u32)0);
2158
2159 /*
2160 * TODO: ACE's in delegations
2161 */
2162 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2163 WRITE32(0);
2164 WRITE32(0);
2165 WRITE32(0); /* XXX: is NULL principal ok? */
2166 ADJUST_ARGS();
2167 break;
2168 default:
2169 BUG();
2170 }
2171 /* XXX save filehandle here */
2172out:
2173 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2174}
2175
2176static void
2177nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2178{
2179 ENCODE_SEQID_OP_HEAD;
2180
2181 if (!nfserr) {
2182 RESERVE_SPACE(sizeof(stateid_t));
2183 WRITE32(oc->oc_resp_stateid.si_generation);
2184 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2185 ADJUST_ARGS();
2186 }
2187
2188 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2189}
2190
2191static void
2192nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2193{
2194 ENCODE_SEQID_OP_HEAD;
2195
2196 if (!nfserr) {
2197 RESERVE_SPACE(sizeof(stateid_t));
2198 WRITE32(od->od_stateid.si_generation);
2199 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2200 ADJUST_ARGS();
2201 }
2202
2203 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2204}
2205
2206static int
44524359
N		 2207nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr,
2208 struct nfsd4_read *read)
1da177e4
LT		 2209{
2210 u32 eof;
2211 int v, pn;
2212 unsigned long maxcount;
2213 long len;
2214 ENCODE_HEAD;
2215
2216 if (nfserr)
2217 return nfserr;
2218 if (resp->xbuf->page_len)
2219 return nfserr_resource;
2220
2221 RESERVE_SPACE(8); /* eof flag and byte count */
2222
7adae489 2223 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2224 if (maxcount > read->rd_length)
2225 maxcount = read->rd_length;
2226
2227 len = maxcount;
2228 v = 0;
2229 while (len > 0) {
44524359 2230 pn = resp->rqstp->rq_resused++;
3cc03b16 2231 resp->rqstp->rq_vec[v].iov_base =
44524359 2232 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2233 resp->rqstp->rq_vec[v].iov_len =
44524359 2234 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2235 v++;
2236 len -= PAGE_SIZE;
2237 }
2238 read->rd_vlen = v;
2239
2240 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2241 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2242 &maxcount);
2243
2244 if (nfserr == nfserr_symlink)
2245 nfserr = nfserr_inval;
2246 if (nfserr)
2247 return nfserr;
44524359
N		 2248 eof = (read->rd_offset + maxcount >=
2249 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2250
2251 WRITE32(eof);
2252 WRITE32(maxcount);
2253 ADJUST_ARGS();
6ed6decc
N		 2254 resp->xbuf->head[0].iov_len = (char*)p
2255 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2256 resp->xbuf->page_len = maxcount;
2257
6ed6decc 2258 /* Use rest of head for padding and remaining ops: */
6ed6decc 2259 resp->xbuf->tail[0].iov_base = p;
1da177e4 2260 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2261 if (maxcount&3) {
6ed6decc
N		 2262 RESERVE_SPACE(4);
2263 WRITE32(0);
1da177e4
LT		 2264 resp->xbuf->tail[0].iov_base += maxcount&3;
2265 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2266 ADJUST_ARGS();
1da177e4
LT		 2267 }
2268 return 0;
2269}
2270
2271static int
2272nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2273{
2274 int maxcount;
2275 char *page;
2276 ENCODE_HEAD;
2277
2278 if (nfserr)
2279 return nfserr;
2280 if (resp->xbuf->page_len)
2281 return nfserr_resource;
2282
44524359 2283 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2284
2285 maxcount = PAGE_SIZE;
2286 RESERVE_SPACE(4);
2287
2288 /*
2289 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2290 * if they would overflow the buffer. Is this kosher in NFSv4? If
2291 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2292 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2293 */
2294 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2295 if (nfserr == nfserr_isdir)
2296 return nfserr_inval;
2297 if (nfserr)
2298 return nfserr;
2299
2300 WRITE32(maxcount);
2301 ADJUST_ARGS();
6ed6decc
N		 2302 resp->xbuf->head[0].iov_len = (char*)p
2303 - (char*)resp->xbuf->head[0].iov_base;
2304 resp->xbuf->page_len = maxcount;
1da177e4 2305
6ed6decc 2306 /* Use rest of head for padding and remaining ops: */
6ed6decc 2307 resp->xbuf->tail[0].iov_base = p;
1da177e4 2308 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2309 if (maxcount&3) {
6ed6decc
N		 2310 RESERVE_SPACE(4);
2311 WRITE32(0);
1da177e4
LT		 2312 resp->xbuf->tail[0].iov_base += maxcount&3;
2313 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2314 ADJUST_ARGS();
1da177e4
LT		 2315 }
2316 return 0;
2317}
2318
2319static int
2320nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2321{
2322 int maxcount;
2323 loff_t offset;
2ebbc012 2324 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2325 ENCODE_HEAD;
2326
2327 if (nfserr)
2328 return nfserr;
2329 if (resp->xbuf->page_len)
2330 return nfserr_resource;
2331
2332 RESERVE_SPACE(8); /* verifier */
2333 savep = p;
2334
2335 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2336 WRITE32(0);
2337 WRITE32(0);
2338 ADJUST_ARGS();
2339 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2340 tailbase = p;
1da177e4
LT		 2341
2342 maxcount = PAGE_SIZE;
2343 if (maxcount > readdir->rd_maxcount)
2344 maxcount = readdir->rd_maxcount;
2345
2346 /*
2347 * Convert from bytes to words, account for the two words already
2348 * written, make sure to leave two words at the end for the next
2349 * pointer and eof field.
2350 */
2351 maxcount = (maxcount >> 2) - 4;
2352 if (maxcount < 0) {
2353 nfserr = nfserr_toosmall;
2354 goto err_no_verf;
2355 }
2356
44524359 2357 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2358 readdir->common.err = 0;
2359 readdir->buflen = maxcount;
2360 readdir->buffer = page;
2361 readdir->offset = NULL;
2362
2363 offset = readdir->rd_cookie;
2364 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2365 &offset,
2366 &readdir->common, nfsd4_encode_dirent);
2367 if (nfserr == nfs_ok &&
2368 readdir->common.err == nfserr_toosmall &&
2369 readdir->buffer == page)
2370 nfserr = nfserr_toosmall;
2371 if (nfserr == nfserr_symlink)
2372 nfserr = nfserr_notdir;
2373 if (nfserr)
2374 goto err_no_verf;
2375
2376 if (readdir->offset)
2377 xdr_encode_hyper(readdir->offset, offset);
2378
2379 p = readdir->buffer;
2380 *p++ = 0; /* no more entries */
2381 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2382 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2383 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2384
bb6e8a9f 2385 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2386 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2387 resp->xbuf->tail[0].iov_len = 0;
2388 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2389 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2390
2391 return 0;
2392err_no_verf:
2393 p = savep;
2394 ADJUST_ARGS();
2395 return nfserr;
2396}
2397
2398static void
2399nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2400{
2401 ENCODE_HEAD;
2402
2403 if (!nfserr) {
2404 RESERVE_SPACE(20);
2405 WRITECINFO(remove->rm_cinfo);
2406 ADJUST_ARGS();
2407 }
2408}
2409
2410static void
2411nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2412{
2413 ENCODE_HEAD;
2414
2415 if (!nfserr) {
2416 RESERVE_SPACE(40);
2417 WRITECINFO(rename->rn_sinfo);
2418 WRITECINFO(rename->rn_tinfo);
2419 ADJUST_ARGS();
2420 }
2421}
2422
2423/*
2424 * The SETATTR encode routine is special -- it always encodes a bitmap,
2425 * regardless of the error status.
2426 */
2427static void
2428nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2429{
2430 ENCODE_HEAD;
2431
2432 RESERVE_SPACE(12);
2433 if (nfserr) {
2434 WRITE32(2);
2435 WRITE32(0);
2436 WRITE32(0);
2437 }
2438 else {
2439 WRITE32(2);
2440 WRITE32(setattr->sa_bmval[0]);
2441 WRITE32(setattr->sa_bmval[1]);
2442 }
2443 ADJUST_ARGS();
2444}
2445
2446static void
2447nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2448{
2449 ENCODE_HEAD;
2450
2451 if (!nfserr) {
2452 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2453 WRITEMEM(&scd->se_clientid, 8);
2454 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2455 ADJUST_ARGS();
2456 }
2457 else if (nfserr == nfserr_clid_inuse) {
2458 RESERVE_SPACE(8);
2459 WRITE32(0);
2460 WRITE32(0);
2461 ADJUST_ARGS();
2462 }
2463}
2464
2465static void
2466nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2467{
2468 ENCODE_HEAD;
2469
2470 if (!nfserr) {
2471 RESERVE_SPACE(16);
2472 WRITE32(write->wr_bytes_written);
2473 WRITE32(write->wr_how_written);
2474 WRITEMEM(write->wr_verifier.data, 8);
2475 ADJUST_ARGS();
2476 }
2477}
2478
2479void
2480nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2481{
2ebbc012 2482 __be32 *statp;
1da177e4
LT		 2483 ENCODE_HEAD;
2484
2485 RESERVE_SPACE(8);
2486 WRITE32(op->opnum);
2487 statp = p++; /* to be backfilled at the end */
2488 ADJUST_ARGS();
2489
2490 switch (op->opnum) {
2491 case OP_ACCESS:
2492 nfsd4_encode_access(resp, op->status, &op->u.access);
2493 break;
2494 case OP_CLOSE:
2495 nfsd4_encode_close(resp, op->status, &op->u.close);
2496 break;
2497 case OP_COMMIT:
2498 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2499 break;
2500 case OP_CREATE:
2501 nfsd4_encode_create(resp, op->status, &op->u.create);
2502 break;
2503 case OP_DELEGRETURN:
2504 break;
2505 case OP_GETATTR:
2506 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2507 break;
2508 case OP_GETFH:
2509 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2510 break;
2511 case OP_LINK:
2512 nfsd4_encode_link(resp, op->status, &op->u.link);
2513 break;
2514 case OP_LOCK:
2515 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2516 break;
2517 case OP_LOCKT:
2518 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2519 break;
2520 case OP_LOCKU:
2521 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2522 break;
2523 case OP_LOOKUP:
2524 break;
2525 case OP_LOOKUPP:
2526 break;
2527 case OP_NVERIFY:
2528 break;
2529 case OP_OPEN:
2530 nfsd4_encode_open(resp, op->status, &op->u.open);
2531 break;
2532 case OP_OPEN_CONFIRM:
2533 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2534 break;
2535 case OP_OPEN_DOWNGRADE:
2536 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2537 break;
2538 case OP_PUTFH:
2539 break;
2540 case OP_PUTROOTFH:
2541 break;
2542 case OP_READ:
2543 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2544 break;
2545 case OP_READDIR:
2546 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2547 break;
2548 case OP_READLINK:
2549 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2550 break;
2551 case OP_REMOVE:
2552 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2553 break;
2554 case OP_RENAME:
2555 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2556 break;
2557 case OP_RENEW:
2558 break;
2559 case OP_RESTOREFH:
2560 break;
2561 case OP_SAVEFH:
2562 break;
2563 case OP_SETATTR:
2564 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2565 break;
2566 case OP_SETCLIENTID:
2567 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2568 break;
2569 case OP_SETCLIENTID_CONFIRM:
2570 break;
2571 case OP_VERIFY:
2572 break;
2573 case OP_WRITE:
2574 nfsd4_encode_write(resp, op->status, &op->u.write);
2575 break;
2576 case OP_RELEASE_LOCKOWNER:
2577 break;
2578 default:
2579 break;
2580 }
2581
2582 /*
2583 * Note: We write the status directly, instead of using WRITE32(),
2584 * since it is already in network byte order.
2585 */
2586 *statp = op->status;
2587}
2588
2589/*
2590 * Encode the reply stored in the stateowner reply cache
2591 *
2592 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2593 * previously sent already encoded operation.
2594 *
2595 * called with nfs4_lock_state() held
2596 */
2597void
2598nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2599{
2600 ENCODE_HEAD;
2601 struct nfs4_replay *rp = op->replay;
2602
2603 BUG_ON(!rp);
2604
2605 RESERVE_SPACE(8);
2606 WRITE32(op->opnum);
2607 *p++ = rp->rp_status; /* already xdr'ed */
2608 ADJUST_ARGS();
2609
2610 RESERVE_SPACE(rp->rp_buflen);
2611 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2612 ADJUST_ARGS();
2613}
2614
2615/*
2616 * END OF "GENERIC" ENCODE ROUTINES.
2617 */
2618
2619int
2ebbc012 2620nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 2621{
2622 return xdr_ressize_check(rqstp, p);
2623}
2624
2625void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2626{
2627 if (args->ops != args->iops) {
2628 kfree(args->ops);
2629 args->ops = args->iops;
2630 }
f99d49ad
JJ		 2631 kfree(args->tmpp);
2632 args->tmpp = NULL;
1da177e4
LT		 2633 while (args->to_free) {
2634 struct tmpbuf *tb = args->to_free;
2635 args->to_free = tb->next;
2636 tb->release(tb->buf);
2637 kfree(tb);
2638 }
2639}
2640
2641int
2ebbc012 2642nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4
LT		 2643{
2644 int status;
2645
2646 args->p = p;
2647 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2648 args->pagelist = rqstp->rq_arg.pages;
2649 args->pagelen = rqstp->rq_arg.page_len;
2650 args->tmpp = NULL;
2651 args->to_free = NULL;
2652 args->ops = args->iops;
2653 args->rqstp = rqstp;
2654
2655 status = nfsd4_decode_compound(args);
2656 if (status) {
2657 nfsd4_release_compoundargs(args);
2658 }
2659 return !status;
2660}
2661
2662int
2ebbc012 2663nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 2664{
2665 /*
2666 * All that remains is to write the tag and operation count...
2667 */
2668 struct kvec *iov;
2669 p = resp->tagp;
2670 *p++ = htonl(resp->taglen);
2671 memcpy(p, resp->tag, resp->taglen);
2672 p += XDR_QUADLEN(resp->taglen);
2673 *p++ = htonl(resp->opcnt);
2674
2675 if (rqstp->rq_res.page_len)
2676 iov = &rqstp->rq_res.tail[0];
2677 else
2678 iov = &rqstp->rq_res.head[0];
2679 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2680 BUG_ON(iov->iov_len > PAGE_SIZE);
2681 return 1;
2682}
2683
2684/*
2685 * Local variables:
2686 * c-basic-offset: 8
2687 * End:
2688 */
Clone of davem's net-next-2.6 tree