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AGP fix race condition between unmapping and freeing pages
[linux-2.6/mini2440.git] / fs / nfsd / nfs4xdr.c
blob8ef0964179bcf4482d7123b5a53bf727f79e77d6
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/fs.h>
48 #include <linux/namei.h>
49 #include <linux/vfs.h>
50 #include <linux/sunrpc/xdr.h>
51 #include <linux/sunrpc/svc.h>
52 #include <linux/sunrpc/clnt.h>
53 #include <linux/nfsd/nfsd.h>
54 #include <linux/nfsd/state.h>
55 #include <linux/nfsd/xdr4.h>
56 #include <linux/nfsd_idmap.h>
57 #include <linux/nfs4.h>
58 #include <linux/nfs4_acl.h>
59 #include <linux/sunrpc/gss_api.h>
60 #include <linux/sunrpc/svcauth_gss.h>
61
62 #define NFSDDBG_FACILITY NFSDDBG_XDR
63
64 /*
65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
66 * directory in order to indicate to the client that a filesystem boundary is present
67 * We use a fixed fsid for a referral
68 */
69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
71
72 static __be32
73 check_filename(char *str, int len, __be32 err)
74 {
75 int i;
76
77 if (len == 0)
78 return nfserr_inval;
79 if (isdotent(str, len))
80 return err;
81 for (i = 0; i < len; i++)
82 if (str[i] == '/')
83 return err;
84 return 0;
85 }
86
87 /*
88 * START OF "GENERIC" DECODE ROUTINES.
89 * These may look a little ugly since they are imported from a "generic"
90 * set of XDR encode/decode routines which are intended to be shared by
91 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 *
93 * If the pain of reading these is too great, it should be a straightforward
94 * task to translate them into Linux-specific versions which are more
95 * consistent with the style used in NFSv2/v3...
96 */
97 #define DECODE_HEAD \
98 __be32 *p; \
99 __be32 status
100 #define DECODE_TAIL \
101 status = 0; \
102 out: \
103 return status; \
104 xdr_error: \
105 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
106 status = nfserr_bad_xdr; \
107 goto out
108
109 #define READ32(x) (x) = ntohl(*p++)
110 #define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
113 } while (0)
114 #define READTIME(x) do { \
115 p++; \
116 (x) = ntohl(*p++); \
117 p++; \
118 } while (0)
119 #define READMEM(x,nbytes) do { \
120 x = (char *)p; \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123 #define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
126 (char *)p)) { \
127 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
128 goto xdr_error; \
129 } \
130 p += XDR_QUADLEN(nbytes); \
131 } while (0)
132 #define COPYMEM(x,nbytes) do { \
133 memcpy((x), p, nbytes); \
134 p += XDR_QUADLEN(nbytes); \
135 } while (0)
136
137 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
138 #define READ_BUF(nbytes) do { \
139 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
140 p = argp->p; \
141 argp->p += XDR_QUADLEN(nbytes); \
142 } else if (!(p = read_buf(argp, nbytes))) { \
143 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
144 goto xdr_error; \
145 } \
146 } while (0)
147
148 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
149 {
150 /* We want more bytes than seem to be available.
151 * Maybe we need a new page, maybe we have just run out
152 */
153 int avail = (char*)argp->end - (char*)argp->p;
154 __be32 *p;
155 if (avail + argp->pagelen < nbytes)
156 return NULL;
157 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
158 return NULL;
159 /* ok, we can do it with the current plus the next page */
160 if (nbytes <= sizeof(argp->tmp))
161 p = argp->tmp;
162 else {
163 kfree(argp->tmpp);
164 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
165 if (!p)
166 return NULL;
167
168 }
169 memcpy(p, argp->p, avail);
170 /* step to next page */
171 argp->p = page_address(argp->pagelist[0]);
172 argp->pagelist++;
173 if (argp->pagelen < PAGE_SIZE) {
174 argp->end = p + (argp->pagelen>>2);
175 argp->pagelen = 0;
176 } else {
177 argp->end = p + (PAGE_SIZE>>2);
178 argp->pagelen -= PAGE_SIZE;
179 }
180 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
181 argp->p += XDR_QUADLEN(nbytes - avail);
182 return p;
183 }
184
185 static int
186 defer_free(struct nfsd4_compoundargs *argp,
187 void (*release)(const void *), void *p)
188 {
189 struct tmpbuf *tb;
190
191 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
192 if (!tb)
193 return -ENOMEM;
194 tb->buf = p;
195 tb->release = release;
196 tb->next = argp->to_free;
197 argp->to_free = tb;
198 return 0;
199 }
200
201 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
202 {
203 if (p == argp->tmp) {
204 p = kmalloc(nbytes, GFP_KERNEL);
205 if (!p)
206 return NULL;
207 memcpy(p, argp->tmp, nbytes);
208 } else {
209 BUG_ON(p != argp->tmpp);
210 argp->tmpp = NULL;
211 }
212 if (defer_free(argp, kfree, p)) {
213 kfree(p);
214 return NULL;
215 } else
216 return (char *)p;
217 }
218
219 static __be32
220 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
221 {
222 u32 bmlen;
223 DECODE_HEAD;
224
225 bmval[0] = 0;
226 bmval[1] = 0;
227
228 READ_BUF(4);
229 READ32(bmlen);
230 if (bmlen > 1000)
231 goto xdr_error;
232
233 READ_BUF(bmlen << 2);
234 if (bmlen > 0)
235 READ32(bmval[0]);
236 if (bmlen > 1)
237 READ32(bmval[1]);
238
239 DECODE_TAIL;
240 }
241
242 static __be32
243 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
244 struct nfs4_acl **acl)
245 {
246 int expected_len, len = 0;
247 u32 dummy32;
248 char *buf;
249 int host_err;
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_ATTRNOTSUPP;
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;
276 struct nfs4_ace *ace;
277
278 READ_BUF(4); len += 4;
279 READ32(nace);
280
281 if (nace > NFS4_ACL_MAX)
282 return nfserr_resource;
283
284 *acl = nfs4_acl_new(nace);
285 if (*acl == NULL) {
286 host_err = -ENOMEM;
287 goto out_nfserr;
288 }
289 defer_free(argp, kfree, *acl);
290
291 (*acl)->naces = nace;
292 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
293 READ_BUF(16); len += 16;
294 READ32(ace->type);
295 READ32(ace->flag);
296 READ32(ace->access_mask);
297 READ32(dummy32);
298 READ_BUF(dummy32);
299 len += XDR_QUADLEN(dummy32) << 2;
300 READMEM(buf, dummy32);
301 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
302 host_err = 0;
303 if (ace->whotype != NFS4_ACL_WHO_NAMED)
304 ace->who = 0;
305 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
306 host_err = nfsd_map_name_to_gid(argp->rqstp,
307 buf, dummy32, &ace->who);
308 else
309 host_err = nfsd_map_name_to_uid(argp->rqstp,
310 buf, dummy32, &ace->who);
311 if (host_err)
312 goto out_nfserr;
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 ((host_err = 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 ((host_err = 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
416 out_nfserr:
417 status = nfserrno(host_err);
418 goto out;
419 }
420
421 static __be32
422 nfsd4_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
432 static __be32
433 nfsd4_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
447 static __be32
448 nfsd4_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
459 static __be32
460 nfsd4_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
499 static inline __be32
500 nfsd4_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
511 static inline __be32
512 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
513 {
514 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
515 }
516
517 static __be32
518 nfsd4_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
532 static __be32
533 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
534 {
535 DECODE_HEAD;
536
537 lock->lk_replay_owner = NULL;
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
571 static __be32
572 nfsd4_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
590 static __be32
591 nfsd4_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
609 static __be32
610 nfsd4_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
624 static __be32
625 nfsd4_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
702 static __be32
703 nfsd4_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
716 static __be32
717 nfsd4_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
732 static __be32
733 nfsd4_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
747 static __be32
748 nfsd4_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
761 static __be32
762 nfsd4_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
777 static __be32
778 nfsd4_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
792 static __be32
793 nfsd4_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
812 static __be32
813 nfsd4_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
823 static __be32
824 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
825 struct nfsd4_secinfo *secinfo)
826 {
827 DECODE_HEAD;
828
829 READ_BUF(4);
830 READ32(secinfo->si_namelen);
831 READ_BUF(secinfo->si_namelen);
832 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
833 status = check_filename(secinfo->si_name, secinfo->si_namelen,
834 nfserr_noent);
835 if (status)
836 return status;
837 DECODE_TAIL;
838 }
839
840 static __be32
841 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
842 {
843 DECODE_HEAD;
844
845 READ_BUF(sizeof(stateid_t));
846 READ32(setattr->sa_stateid.si_generation);
847 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
848 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
849 goto out;
850
851 DECODE_TAIL;
852 }
853
854 static __be32
855 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
856 {
857 DECODE_HEAD;
858
859 READ_BUF(12);
860 COPYMEM(setclientid->se_verf.data, 8);
861 READ32(setclientid->se_namelen);
862
863 READ_BUF(setclientid->se_namelen + 8);
864 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
865 READ32(setclientid->se_callback_prog);
866 READ32(setclientid->se_callback_netid_len);
867
868 READ_BUF(setclientid->se_callback_netid_len + 4);
869 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
870 READ32(setclientid->se_callback_addr_len);
871
872 READ_BUF(setclientid->se_callback_addr_len + 4);
873 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
874 READ32(setclientid->se_callback_ident);
875
876 DECODE_TAIL;
877 }
878
879 static __be32
880 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
881 {
882 DECODE_HEAD;
883
884 READ_BUF(8 + sizeof(nfs4_verifier));
885 COPYMEM(&scd_c->sc_clientid, 8);
886 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
887
888 DECODE_TAIL;
889 }
890
891 /* Also used for NVERIFY */
892 static __be32
893 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
894 {
895 #if 0
896 struct nfsd4_compoundargs save = {
897 .p = argp->p,
898 .end = argp->end,
899 .rqstp = argp->rqstp,
900 };
901 u32 ve_bmval[2];
902 struct iattr ve_iattr; /* request */
903 struct nfs4_acl *ve_acl; /* request */
904 #endif
905 DECODE_HEAD;
906
907 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
908 goto out;
909
910 /* For convenience's sake, we compare raw xdr'd attributes in
911 * nfsd4_proc_verify; however we still decode here just to return
912 * correct error in case of bad xdr. */
913 #if 0
914 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
915 if (status == nfserr_inval) {
916 status = nfserrno(status);
917 goto out;
918 }
919 #endif
920 READ_BUF(4);
921 READ32(verify->ve_attrlen);
922 READ_BUF(verify->ve_attrlen);
923 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
924
925 DECODE_TAIL;
926 }
927
928 static __be32
929 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
930 {
931 int avail;
932 int v;
933 int len;
934 DECODE_HEAD;
935
936 READ_BUF(sizeof(stateid_opaque_t) + 20);
937 READ32(write->wr_stateid.si_generation);
938 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
939 READ64(write->wr_offset);
940 READ32(write->wr_stable_how);
941 if (write->wr_stable_how > 2)
942 goto xdr_error;
943 READ32(write->wr_buflen);
944
945 /* Sorry .. no magic macros for this.. *
946 * READ_BUF(write->wr_buflen);
947 * SAVEMEM(write->wr_buf, write->wr_buflen);
948 */
949 avail = (char*)argp->end - (char*)argp->p;
950 if (avail + argp->pagelen < write->wr_buflen) {
951 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
952 goto xdr_error;
953 }
954 argp->rqstp->rq_vec[0].iov_base = p;
955 argp->rqstp->rq_vec[0].iov_len = avail;
956 v = 0;
957 len = write->wr_buflen;
958 while (len > argp->rqstp->rq_vec[v].iov_len) {
959 len -= argp->rqstp->rq_vec[v].iov_len;
960 v++;
961 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
962 argp->pagelist++;
963 if (argp->pagelen >= PAGE_SIZE) {
964 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
965 argp->pagelen -= PAGE_SIZE;
966 } else {
967 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
968 argp->pagelen -= len;
969 }
970 }
971 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
972 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
973 argp->rqstp->rq_vec[v].iov_len = len;
974 write->wr_vlen = v+1;
975
976 DECODE_TAIL;
977 }
978
979 static __be32
980 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
981 {
982 DECODE_HEAD;
983
984 READ_BUF(12);
985 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
986 READ32(rlockowner->rl_owner.len);
987 READ_BUF(rlockowner->rl_owner.len);
988 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
989
990 DECODE_TAIL;
991 }
992
993 static __be32
994 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
995 {
996 DECODE_HEAD;
997 struct nfsd4_op *op;
998 int i;
999
1000 /*
1001 * XXX: According to spec, we should check the tag
1002 * for UTF-8 compliance. I'm postponing this for
1003 * now because it seems that some clients do use
1004 * binary tags.
1005 */
1006 READ_BUF(4);
1007 READ32(argp->taglen);
1008 READ_BUF(argp->taglen + 8);
1009 SAVEMEM(argp->tag, argp->taglen);
1010 READ32(argp->minorversion);
1011 READ32(argp->opcnt);
1012
1013 if (argp->taglen > NFSD4_MAX_TAGLEN)
1014 goto xdr_error;
1015 if (argp->opcnt > 100)
1016 goto xdr_error;
1017
1018 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1019 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1020 if (!argp->ops) {
1021 argp->ops = argp->iops;
1022 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1023 goto xdr_error;
1024 }
1025 }
1026
1027 for (i = 0; i < argp->opcnt; i++) {
1028 op = &argp->ops[i];
1029 op->replay = NULL;
1030
1031 /*
1032 * We can't use READ_BUF() here because we need to handle
1033 * a missing opcode as an OP_WRITE + 1. So we need to check
1034 * to see if we're truly at the end of our buffer or if there
1035 * is another page we need to flip to.
1036 */
1037
1038 if (argp->p == argp->end) {
1039 if (argp->pagelen < 4) {
1040 /* There isn't an opcode still on the wire */
1041 op->opnum = OP_WRITE + 1;
1042 op->status = nfserr_bad_xdr;
1043 argp->opcnt = i+1;
1044 break;
1045 }
1046
1047 /*
1048 * False alarm. We just hit a page boundary, but there
1049 * is still data available. Move pointer across page
1050 * boundary. *snip from READ_BUF*
1051 */
1052 argp->p = page_address(argp->pagelist[0]);
1053 argp->pagelist++;
1054 if (argp->pagelen < PAGE_SIZE) {
1055 argp->end = p + (argp->pagelen>>2);
1056 argp->pagelen = 0;
1057 } else {
1058 argp->end = p + (PAGE_SIZE>>2);
1059 argp->pagelen -= PAGE_SIZE;
1060 }
1061 }
1062 op->opnum = ntohl(*argp->p++);
1063
1064 switch (op->opnum) {
1065 case 2: /* Reserved operation */
1066 op->opnum = OP_ILLEGAL;
1067 if (argp->minorversion == 0)
1068 op->status = nfserr_op_illegal;
1069 else
1070 op->status = nfserr_minor_vers_mismatch;
1071 break;
1072 case OP_ACCESS:
1073 op->status = nfsd4_decode_access(argp, &op->u.access);
1074 break;
1075 case OP_CLOSE:
1076 op->status = nfsd4_decode_close(argp, &op->u.close);
1077 break;
1078 case OP_COMMIT:
1079 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1080 break;
1081 case OP_CREATE:
1082 op->status = nfsd4_decode_create(argp, &op->u.create);
1083 break;
1084 case OP_DELEGRETURN:
1085 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1086 break;
1087 case OP_GETATTR:
1088 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1089 break;
1090 case OP_GETFH:
1091 op->status = nfs_ok;
1092 break;
1093 case OP_LINK:
1094 op->status = nfsd4_decode_link(argp, &op->u.link);
1095 break;
1096 case OP_LOCK:
1097 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1098 break;
1099 case OP_LOCKT:
1100 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1101 break;
1102 case OP_LOCKU:
1103 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1104 break;
1105 case OP_LOOKUP:
1106 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1107 break;
1108 case OP_LOOKUPP:
1109 op->status = nfs_ok;
1110 break;
1111 case OP_NVERIFY:
1112 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1113 break;
1114 case OP_OPEN:
1115 op->status = nfsd4_decode_open(argp, &op->u.open);
1116 break;
1117 case OP_OPEN_CONFIRM:
1118 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1119 break;
1120 case OP_OPEN_DOWNGRADE:
1121 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1122 break;
1123 case OP_PUTFH:
1124 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1125 break;
1126 case OP_PUTROOTFH:
1127 op->status = nfs_ok;
1128 break;
1129 case OP_READ:
1130 op->status = nfsd4_decode_read(argp, &op->u.read);
1131 break;
1132 case OP_READDIR:
1133 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1134 break;
1135 case OP_READLINK:
1136 op->status = nfs_ok;
1137 break;
1138 case OP_REMOVE:
1139 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1140 break;
1141 case OP_RENAME:
1142 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1143 break;
1144 case OP_RESTOREFH:
1145 op->status = nfs_ok;
1146 break;
1147 case OP_RENEW:
1148 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1149 break;
1150 case OP_SAVEFH:
1151 op->status = nfs_ok;
1152 break;
1153 case OP_SECINFO:
1154 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo);
1155 break;
1156 case OP_SETATTR:
1157 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1158 break;
1159 case OP_SETCLIENTID:
1160 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1161 break;
1162 case OP_SETCLIENTID_CONFIRM:
1163 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1164 break;
1165 case OP_VERIFY:
1166 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1167 break;
1168 case OP_WRITE:
1169 op->status = nfsd4_decode_write(argp, &op->u.write);
1170 break;
1171 case OP_RELEASE_LOCKOWNER:
1172 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1173 break;
1174 default:
1175 op->opnum = OP_ILLEGAL;
1176 op->status = nfserr_op_illegal;
1177 break;
1178 }
1179
1180 if (op->status) {
1181 argp->opcnt = i+1;
1182 break;
1183 }
1184 }
1185
1186 DECODE_TAIL;
1187 }
1188 /*
1189 * END OF "GENERIC" DECODE ROUTINES.
1190 */
1191
1192 /*
1193 * START OF "GENERIC" ENCODE ROUTINES.
1194 * These may look a little ugly since they are imported from a "generic"
1195 * set of XDR encode/decode routines which are intended to be shared by
1196 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1197 *
1198 * If the pain of reading these is too great, it should be a straightforward
1199 * task to translate them into Linux-specific versions which are more
1200 * consistent with the style used in NFSv2/v3...
1201 */
1202 #define ENCODE_HEAD __be32 *p
1203
1204 #define WRITE32(n) *p++ = htonl(n)
1205 #define WRITE64(n) do { \
1206 *p++ = htonl((u32)((n) >> 32)); \
1207 *p++ = htonl((u32)(n)); \
1208 } while (0)
1209 #define WRITEMEM(ptr,nbytes) do { \
1210 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1211 memcpy(p, ptr, nbytes); \
1212 p += XDR_QUADLEN(nbytes); \
1213 } while (0)
1214 #define WRITECINFO(c) do { \
1215 *p++ = htonl(c.atomic); \
1216 *p++ = htonl(c.before_ctime_sec); \
1217 *p++ = htonl(c.before_ctime_nsec); \
1218 *p++ = htonl(c.after_ctime_sec); \
1219 *p++ = htonl(c.after_ctime_nsec); \
1220 } while (0)
1221
1222 #define RESERVE_SPACE(nbytes) do { \
1223 p = resp->p; \
1224 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1225 } while (0)
1226 #define ADJUST_ARGS() resp->p = p
1227
1228 /*
1229 * Header routine to setup seqid operation replay cache
1230 */
1231 #define ENCODE_SEQID_OP_HEAD \
1232 __be32 *p; \
1233 __be32 *save; \
1234 \
1235 save = resp->p;
1236
1237 /*
1238 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1239 * is where sequence id's are incremented, and the replay cache is filled.
1240 * Note that we increment sequence id's here, at the last moment, so we're sure
1241 * we know whether the error to be returned is a sequence id mutating error.
1242 */
1243
1244 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1245 if (seqid_mutating_err(nfserr) && stateowner) { \
1246 stateowner->so_seqid++; \
1247 stateowner->so_replay.rp_status = nfserr; \
1248 stateowner->so_replay.rp_buflen = \
1249 (((char *)(resp)->p - (char *)save)); \
1250 memcpy(stateowner->so_replay.rp_buf, save, \
1251 stateowner->so_replay.rp_buflen); \
1252 } } while (0);
1253
1254 /* Encode as an array of strings the string given with components
1255 * seperated @sep.
1256 */
1257 static __be32 nfsd4_encode_components(char sep, char *components,
1258 __be32 **pp, int *buflen)
1259 {
1260 __be32 *p = *pp;
1261 __be32 *countp = p;
1262 int strlen, count=0;
1263 char *str, *end;
1264
1265 dprintk("nfsd4_encode_components(%s)\n", components);
1266 if ((*buflen -= 4) < 0)
1267 return nfserr_resource;
1268 WRITE32(0); /* We will fill this in with @count later */
1269 end = str = components;
1270 while (*end) {
1271 for (; *end && (*end != sep); end++)
1272 ; /* Point to end of component */
1273 strlen = end - str;
1274 if (strlen) {
1275 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1276 return nfserr_resource;
1277 WRITE32(strlen);
1278 WRITEMEM(str, strlen);
1279 count++;
1280 }
1281 else
1282 end++;
1283 str = end;
1284 }
1285 *pp = p;
1286 p = countp;
1287 WRITE32(count);
1288 return 0;
1289 }
1290
1291 /*
1292 * encode a location element of a fs_locations structure
1293 */
1294 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1295 __be32 **pp, int *buflen)
1296 {
1297 __be32 status;
1298 __be32 *p = *pp;
1299
1300 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1301 if (status)
1302 return status;
1303 status = nfsd4_encode_components('/', location->path, &p, buflen);
1304 if (status)
1305 return status;
1306 *pp = p;
1307 return 0;
1308 }
1309
1310 /*
1311 * Return the path to an export point in the pseudo filesystem namespace
1312 * Returned string is safe to use as long as the caller holds a reference
1313 * to @exp.
1314 */
1315 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1316 {
1317 struct svc_fh tmp_fh;
1318 char *path, *rootpath;
1319
1320 fh_init(&tmp_fh, NFS4_FHSIZE);
1321 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1322 if (*stat)
1323 return NULL;
1324 rootpath = tmp_fh.fh_export->ex_path;
1325
1326 path = exp->ex_path;
1327
1328 if (strncmp(path, rootpath, strlen(rootpath))) {
1329 printk("nfsd: fs_locations failed;"
1330 "%s is not contained in %s\n", path, rootpath);
1331 *stat = nfserr_notsupp;
1332 return NULL;
1333 }
1334
1335 return path + strlen(rootpath);
1336 }
1337
1338 /*
1339 * encode a fs_locations structure
1340 */
1341 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1342 struct svc_export *exp,
1343 __be32 **pp, int *buflen)
1344 {
1345 __be32 status;
1346 int i;
1347 __be32 *p = *pp;
1348 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1349 char *root = nfsd4_path(rqstp, exp, &status);
1350
1351 if (status)
1352 return status;
1353 status = nfsd4_encode_components('/', root, &p, buflen);
1354 if (status)
1355 return status;
1356 if ((*buflen -= 4) < 0)
1357 return nfserr_resource;
1358 WRITE32(fslocs->locations_count);
1359 for (i=0; i<fslocs->locations_count; i++) {
1360 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1361 &p, buflen);
1362 if (status)
1363 return status;
1364 }
1365 *pp = p;
1366 return 0;
1367 }
1368
1369 static u32 nfs4_ftypes[16] = {
1370 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1371 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1372 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1373 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1374 };
1375
1376 static __be32
1377 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1378 __be32 **p, int *buflen)
1379 {
1380 int status;
1381
1382 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1383 return nfserr_resource;
1384 if (whotype != NFS4_ACL_WHO_NAMED)
1385 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1386 else if (group)
1387 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1388 else
1389 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1390 if (status < 0)
1391 return nfserrno(status);
1392 *p = xdr_encode_opaque(*p, NULL, status);
1393 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1394 BUG_ON(*buflen < 0);
1395 return 0;
1396 }
1397
1398 static inline __be32
1399 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1400 {
1401 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1402 }
1403
1404 static inline __be32
1405 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1406 {
1407 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1408 }
1409
1410 static inline __be32
1411 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1412 __be32 **p, int *buflen)
1413 {
1414 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1415 }
1416
1417 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1418 FATTR4_WORD0_RDATTR_ERROR)
1419 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1420
1421 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1422 {
1423 /* As per referral draft: */
1424 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1425 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1426 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1427 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1428 *rdattr_err = NFSERR_MOVED;
1429 else
1430 return nfserr_moved;
1431 }
1432 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1433 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1434 return 0;
1435 }
1436
1437 /*
1438 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1439 * ourselves.
1440 *
1441 * @countp is the buffer size in _words_; upon successful return this becomes
1442 * replaced with the number of words written.
1443 */
1444 __be32
1445 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1446 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1447 struct svc_rqst *rqstp)
1448 {
1449 u32 bmval0 = bmval[0];
1450 u32 bmval1 = bmval[1];
1451 struct kstat stat;
1452 struct svc_fh tempfh;
1453 struct kstatfs statfs;
1454 int buflen = *countp << 2;
1455 __be32 *attrlenp;
1456 u32 dummy;
1457 u64 dummy64;
1458 u32 rdattr_err = 0;
1459 __be32 *p = buffer;
1460 __be32 status;
1461 int err;
1462 int aclsupport = 0;
1463 struct nfs4_acl *acl = NULL;
1464
1465 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1466 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1467 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1468
1469 if (exp->ex_fslocs.migrated) {
1470 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1471 if (status)
1472 goto out;
1473 }
1474
1475 err = vfs_getattr(exp->ex_mnt, dentry, &stat);
1476 if (err)
1477 goto out_nfserr;
1478 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1479 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1480 FATTR4_WORD1_SPACE_TOTAL))) {
1481 err = vfs_statfs(dentry, &statfs);
1482 if (err)
1483 goto out_nfserr;
1484 }
1485 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1486 fh_init(&tempfh, NFS4_FHSIZE);
1487 status = fh_compose(&tempfh, exp, dentry, NULL);
1488 if (status)
1489 goto out;
1490 fhp = &tempfh;
1491 }
1492 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1493 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1494 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1495 aclsupport = (err == 0);
1496 if (bmval0 & FATTR4_WORD0_ACL) {
1497 if (err == -EOPNOTSUPP)
1498 bmval0 &= ~FATTR4_WORD0_ACL;
1499 else if (err == -EINVAL) {
1500 status = nfserr_attrnotsupp;
1501 goto out;
1502 } else if (err != 0)
1503 goto out_nfserr;
1504 }
1505 }
1506 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1507 if (exp->ex_fslocs.locations == NULL) {
1508 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1509 }
1510 }
1511 if ((buflen -= 16) < 0)
1512 goto out_resource;
1513
1514 WRITE32(2);
1515 WRITE32(bmval0);
1516 WRITE32(bmval1);
1517 attrlenp = p++; /* to be backfilled later */
1518
1519 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1520 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1521 if ((buflen -= 12) < 0)
1522 goto out_resource;
1523 if (!aclsupport)
1524 word0 &= ~FATTR4_WORD0_ACL;
1525 if (!exp->ex_fslocs.locations)
1526 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1527 WRITE32(2);
1528 WRITE32(word0);
1529 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1530 }
1531 if (bmval0 & FATTR4_WORD0_TYPE) {
1532 if ((buflen -= 4) < 0)
1533 goto out_resource;
1534 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1535 if (dummy == NF4BAD)
1536 goto out_serverfault;
1537 WRITE32(dummy);
1538 }
1539 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1540 if ((buflen -= 4) < 0)
1541 goto out_resource;
1542 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1543 WRITE32(NFS4_FH_PERSISTENT);
1544 else
1545 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1546 }
1547 if (bmval0 & FATTR4_WORD0_CHANGE) {
1548 /*
1549 * Note: This _must_ be consistent with the scheme for writing
1550 * change_info, so any changes made here must be reflected there
1551 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1552 * macro above.)
1553 */
1554 if ((buflen -= 8) < 0)
1555 goto out_resource;
1556 WRITE32(stat.ctime.tv_sec);
1557 WRITE32(stat.ctime.tv_nsec);
1558 }
1559 if (bmval0 & FATTR4_WORD0_SIZE) {
1560 if ((buflen -= 8) < 0)
1561 goto out_resource;
1562 WRITE64(stat.size);
1563 }
1564 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1565 if ((buflen -= 4) < 0)
1566 goto out_resource;
1567 WRITE32(1);
1568 }
1569 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1570 if ((buflen -= 4) < 0)
1571 goto out_resource;
1572 WRITE32(1);
1573 }
1574 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1575 if ((buflen -= 4) < 0)
1576 goto out_resource;
1577 WRITE32(0);
1578 }
1579 if (bmval0 & FATTR4_WORD0_FSID) {
1580 if ((buflen -= 16) < 0)
1581 goto out_resource;
1582 if (exp->ex_fslocs.migrated) {
1583 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1584 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1585 } else switch(fsid_source(fhp)) {
1586 case FSIDSOURCE_FSID:
1587 WRITE64((u64)exp->ex_fsid);
1588 WRITE64((u64)0);
1589 break;
1590 case FSIDSOURCE_DEV:
1591 WRITE32(0);
1592 WRITE32(MAJOR(stat.dev));
1593 WRITE32(0);
1594 WRITE32(MINOR(stat.dev));
1595 break;
1596 case FSIDSOURCE_UUID:
1597 WRITEMEM(exp->ex_uuid, 16);
1598 break;
1599 }
1600 }
1601 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1602 if ((buflen -= 4) < 0)
1603 goto out_resource;
1604 WRITE32(0);
1605 }
1606 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1607 if ((buflen -= 4) < 0)
1608 goto out_resource;
1609 WRITE32(NFSD_LEASE_TIME);
1610 }
1611 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1612 if ((buflen -= 4) < 0)
1613 goto out_resource;
1614 WRITE32(rdattr_err);
1615 }
1616 if (bmval0 & FATTR4_WORD0_ACL) {
1617 struct nfs4_ace *ace;
1618
1619 if (acl == NULL) {
1620 if ((buflen -= 4) < 0)
1621 goto out_resource;
1622
1623 WRITE32(0);
1624 goto out_acl;
1625 }
1626 if ((buflen -= 4) < 0)
1627 goto out_resource;
1628 WRITE32(acl->naces);
1629
1630 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1631 if ((buflen -= 4*3) < 0)
1632 goto out_resource;
1633 WRITE32(ace->type);
1634 WRITE32(ace->flag);
1635 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1636 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1637 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1638 &p, &buflen);
1639 if (status == nfserr_resource)
1640 goto out_resource;
1641 if (status)
1642 goto out;
1643 }
1644 }
1645 out_acl:
1646 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1647 if ((buflen -= 4) < 0)
1648 goto out_resource;
1649 WRITE32(aclsupport ?
1650 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1651 }
1652 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1653 if ((buflen -= 4) < 0)
1654 goto out_resource;
1655 WRITE32(1);
1656 }
1657 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1658 if ((buflen -= 4) < 0)
1659 goto out_resource;
1660 WRITE32(1);
1661 }
1662 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1663 if ((buflen -= 4) < 0)
1664 goto out_resource;
1665 WRITE32(1);
1666 }
1667 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1668 if ((buflen -= 4) < 0)
1669 goto out_resource;
1670 WRITE32(1);
1671 }
1672 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1673 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1674 if (buflen < 0)
1675 goto out_resource;
1676 WRITE32(fhp->fh_handle.fh_size);
1677 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1678 }
1679 if (bmval0 & FATTR4_WORD0_FILEID) {
1680 if ((buflen -= 8) < 0)
1681 goto out_resource;
1682 WRITE64((u64) stat.ino);
1683 }
1684 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1685 if ((buflen -= 8) < 0)
1686 goto out_resource;
1687 WRITE64((u64) statfs.f_ffree);
1688 }
1689 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1690 if ((buflen -= 8) < 0)
1691 goto out_resource;
1692 WRITE64((u64) statfs.f_ffree);
1693 }
1694 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1695 if ((buflen -= 8) < 0)
1696 goto out_resource;
1697 WRITE64((u64) statfs.f_files);
1698 }
1699 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1700 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1701 if (status == nfserr_resource)
1702 goto out_resource;
1703 if (status)
1704 goto out;
1705 }
1706 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1707 if ((buflen -= 4) < 0)
1708 goto out_resource;
1709 WRITE32(1);
1710 }
1711 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1712 if ((buflen -= 8) < 0)
1713 goto out_resource;
1714 WRITE64(~(u64)0);
1715 }
1716 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1717 if ((buflen -= 4) < 0)
1718 goto out_resource;
1719 WRITE32(255);
1720 }
1721 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1722 if ((buflen -= 4) < 0)
1723 goto out_resource;
1724 WRITE32(~(u32) 0);
1725 }
1726 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1727 if ((buflen -= 8) < 0)
1728 goto out_resource;
1729 WRITE64((u64) svc_max_payload(rqstp));
1730 }
1731 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1732 if ((buflen -= 8) < 0)
1733 goto out_resource;
1734 WRITE64((u64) svc_max_payload(rqstp));
1735 }
1736 if (bmval1 & FATTR4_WORD1_MODE) {
1737 if ((buflen -= 4) < 0)
1738 goto out_resource;
1739 WRITE32(stat.mode & S_IALLUGO);
1740 }
1741 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1742 if ((buflen -= 4) < 0)
1743 goto out_resource;
1744 WRITE32(1);
1745 }
1746 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1747 if ((buflen -= 4) < 0)
1748 goto out_resource;
1749 WRITE32(stat.nlink);
1750 }
1751 if (bmval1 & FATTR4_WORD1_OWNER) {
1752 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1753 if (status == nfserr_resource)
1754 goto out_resource;
1755 if (status)
1756 goto out;
1757 }
1758 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1759 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1760 if (status == nfserr_resource)
1761 goto out_resource;
1762 if (status)
1763 goto out;
1764 }
1765 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1766 if ((buflen -= 8) < 0)
1767 goto out_resource;
1768 WRITE32((u32) MAJOR(stat.rdev));
1769 WRITE32((u32) MINOR(stat.rdev));
1770 }
1771 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1772 if ((buflen -= 8) < 0)
1773 goto out_resource;
1774 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1775 WRITE64(dummy64);
1776 }
1777 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1778 if ((buflen -= 8) < 0)
1779 goto out_resource;
1780 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1781 WRITE64(dummy64);
1782 }
1783 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1784 if ((buflen -= 8) < 0)
1785 goto out_resource;
1786 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1787 WRITE64(dummy64);
1788 }
1789 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1790 if ((buflen -= 8) < 0)
1791 goto out_resource;
1792 dummy64 = (u64)stat.blocks << 9;
1793 WRITE64(dummy64);
1794 }
1795 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1796 if ((buflen -= 12) < 0)
1797 goto out_resource;
1798 WRITE32(0);
1799 WRITE32(stat.atime.tv_sec);
1800 WRITE32(stat.atime.tv_nsec);
1801 }
1802 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1803 if ((buflen -= 12) < 0)
1804 goto out_resource;
1805 WRITE32(0);
1806 WRITE32(1);
1807 WRITE32(0);
1808 }
1809 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1810 if ((buflen -= 12) < 0)
1811 goto out_resource;
1812 WRITE32(0);
1813 WRITE32(stat.ctime.tv_sec);
1814 WRITE32(stat.ctime.tv_nsec);
1815 }
1816 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1817 if ((buflen -= 12) < 0)
1818 goto out_resource;
1819 WRITE32(0);
1820 WRITE32(stat.mtime.tv_sec);
1821 WRITE32(stat.mtime.tv_nsec);
1822 }
1823 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1824 struct dentry *mnt_pnt, *mnt_root;
1825
1826 if ((buflen -= 8) < 0)
1827 goto out_resource;
1828 mnt_root = exp->ex_mnt->mnt_root;
1829 if (mnt_root->d_inode == dentry->d_inode) {
1830 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1831 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1832 } else
1833 WRITE64((u64) stat.ino);
1834 }
1835 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1836 *countp = p - buffer;
1837 status = nfs_ok;
1838
1839 out:
1840 kfree(acl);
1841 if (fhp == &tempfh)
1842 fh_put(&tempfh);
1843 return status;
1844 out_nfserr:
1845 status = nfserrno(err);
1846 goto out;
1847 out_resource:
1848 *countp = 0;
1849 status = nfserr_resource;
1850 goto out;
1851 out_serverfault:
1852 status = nfserr_serverfault;
1853 goto out;
1854 }
1855
1856 static __be32
1857 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1858 const char *name, int namlen, __be32 *p, int *buflen)
1859 {
1860 struct svc_export *exp = cd->rd_fhp->fh_export;
1861 struct dentry *dentry;
1862 __be32 nfserr;
1863
1864 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1865 if (IS_ERR(dentry))
1866 return nfserrno(PTR_ERR(dentry));
1867
1868 exp_get(exp);
1869 if (d_mountpoint(dentry)) {
1870 int err;
1871
1872 /*
1873 * Why the heck aren't we just using nfsd_lookup??
1874 * Different "."/".." handling? Something else?
1875 * At least, add a comment here to explain....
1876 */
1877 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1878 if (err) {
1879 nfserr = nfserrno(err);
1880 goto out_put;
1881 }
1882 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
1883 if (nfserr)
1884 goto out_put;
1885
1886 }
1887 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1888 cd->rd_rqstp);
1889 out_put:
1890 dput(dentry);
1891 exp_put(exp);
1892 return nfserr;
1893 }
1894
1895 static __be32 *
1896 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1897 {
1898 __be32 *attrlenp;
1899
1900 if (buflen < 6)
1901 return NULL;
1902 *p++ = htonl(2);
1903 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1904 *p++ = htonl(0); /* bmval1 */
1905
1906 attrlenp = p++;
1907 *p++ = nfserr; /* no htonl */
1908 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1909 return p;
1910 }
1911
1912 static int
1913 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1914 loff_t offset, u64 ino, unsigned int d_type)
1915 {
1916 struct readdir_cd *ccd = ccdv;
1917 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1918 int buflen;
1919 __be32 *p = cd->buffer;
1920 __be32 nfserr = nfserr_toosmall;
1921
1922 /* In nfsv4, "." and ".." never make it onto the wire.. */
1923 if (name && isdotent(name, namlen)) {
1924 cd->common.err = nfs_ok;
1925 return 0;
1926 }
1927
1928 if (cd->offset)
1929 xdr_encode_hyper(cd->offset, (u64) offset);
1930
1931 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1932 if (buflen < 0)
1933 goto fail;
1934
1935 *p++ = xdr_one; /* mark entry present */
1936 cd->offset = p; /* remember pointer */
1937 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1938 p = xdr_encode_array(p, name, namlen); /* name length & name */
1939
1940 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1941 switch (nfserr) {
1942 case nfs_ok:
1943 p += buflen;
1944 break;
1945 case nfserr_resource:
1946 nfserr = nfserr_toosmall;
1947 goto fail;
1948 case nfserr_dropit:
1949 goto fail;
1950 default:
1951 /*
1952 * If the client requested the RDATTR_ERROR attribute,
1953 * we stuff the error code into this attribute
1954 * and continue. If this attribute was not requested,
1955 * then in accordance with the spec, we fail the
1956 * entire READDIR operation(!)
1957 */
1958 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1959 goto fail;
1960 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1961 if (p == NULL) {
1962 nfserr = nfserr_toosmall;
1963 goto fail;
1964 }
1965 }
1966 cd->buflen -= (p - cd->buffer);
1967 cd->buffer = p;
1968 cd->common.err = nfs_ok;
1969 return 0;
1970 fail:
1971 cd->common.err = nfserr;
1972 return -EINVAL;
1973 }
1974
1975 static void
1976 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1977 {
1978 ENCODE_HEAD;
1979
1980 if (!nfserr) {
1981 RESERVE_SPACE(8);
1982 WRITE32(access->ac_supported);
1983 WRITE32(access->ac_resp_access);
1984 ADJUST_ARGS();
1985 }
1986 }
1987
1988 static void
1989 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1990 {
1991 ENCODE_SEQID_OP_HEAD;
1992
1993 if (!nfserr) {
1994 RESERVE_SPACE(sizeof(stateid_t));
1995 WRITE32(close->cl_stateid.si_generation);
1996 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1997 ADJUST_ARGS();
1998 }
1999 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2000 }
2001
2002
2003 static void
2004 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2005 {
2006 ENCODE_HEAD;
2007
2008 if (!nfserr) {
2009 RESERVE_SPACE(8);
2010 WRITEMEM(commit->co_verf.data, 8);
2011 ADJUST_ARGS();
2012 }
2013 }
2014
2015 static void
2016 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2017 {
2018 ENCODE_HEAD;
2019
2020 if (!nfserr) {
2021 RESERVE_SPACE(32);
2022 WRITECINFO(create->cr_cinfo);
2023 WRITE32(2);
2024 WRITE32(create->cr_bmval[0]);
2025 WRITE32(create->cr_bmval[1]);
2026 ADJUST_ARGS();
2027 }
2028 }
2029
2030 static __be32
2031 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2032 {
2033 struct svc_fh *fhp = getattr->ga_fhp;
2034 int buflen;
2035
2036 if (nfserr)
2037 return nfserr;
2038
2039 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2040 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2041 resp->p, &buflen, getattr->ga_bmval,
2042 resp->rqstp);
2043 if (!nfserr)
2044 resp->p += buflen;
2045 return nfserr;
2046 }
2047
2048 static void
2049 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
2050 {
2051 unsigned int len;
2052 ENCODE_HEAD;
2053
2054 if (!nfserr) {
2055 len = fhp->fh_handle.fh_size;
2056 RESERVE_SPACE(len + 4);
2057 WRITE32(len);
2058 WRITEMEM(&fhp->fh_handle.fh_base, len);
2059 ADJUST_ARGS();
2060 }
2061 }
2062
2063 /*
2064 * Including all fields other than the name, a LOCK4denied structure requires
2065 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2066 */
2067 static void
2068 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2069 {
2070 ENCODE_HEAD;
2071
2072 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2073 WRITE64(ld->ld_start);
2074 WRITE64(ld->ld_length);
2075 WRITE32(ld->ld_type);
2076 if (ld->ld_sop) {
2077 WRITEMEM(&ld->ld_clientid, 8);
2078 WRITE32(ld->ld_sop->so_owner.len);
2079 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2080 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2081 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2082 WRITE64((u64)0); /* clientid */
2083 WRITE32(0); /* length of owner name */
2084 }
2085 ADJUST_ARGS();
2086 }
2087
2088 static void
2089 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2090 {
2091 ENCODE_SEQID_OP_HEAD;
2092
2093 if (!nfserr) {
2094 RESERVE_SPACE(4 + sizeof(stateid_t));
2095 WRITE32(lock->lk_resp_stateid.si_generation);
2096 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2097 ADJUST_ARGS();
2098 } else if (nfserr == nfserr_denied)
2099 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2100
2101 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2102 }
2103
2104 static void
2105 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2106 {
2107 if (nfserr == nfserr_denied)
2108 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2109 }
2110
2111 static void
2112 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2113 {
2114 ENCODE_SEQID_OP_HEAD;
2115
2116 if (!nfserr) {
2117 RESERVE_SPACE(sizeof(stateid_t));
2118 WRITE32(locku->lu_stateid.si_generation);
2119 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2120 ADJUST_ARGS();
2121 }
2122
2123 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2124 }
2125
2126
2127 static void
2128 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2129 {
2130 ENCODE_HEAD;
2131
2132 if (!nfserr) {
2133 RESERVE_SPACE(20);
2134 WRITECINFO(link->li_cinfo);
2135 ADJUST_ARGS();
2136 }
2137 }
2138
2139
2140 static void
2141 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2142 {
2143 ENCODE_SEQID_OP_HEAD;
2144
2145 if (nfserr)
2146 goto out;
2147
2148 RESERVE_SPACE(36 + sizeof(stateid_t));
2149 WRITE32(open->op_stateid.si_generation);
2150 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2151 WRITECINFO(open->op_cinfo);
2152 WRITE32(open->op_rflags);
2153 WRITE32(2);
2154 WRITE32(open->op_bmval[0]);
2155 WRITE32(open->op_bmval[1]);
2156 WRITE32(open->op_delegate_type);
2157 ADJUST_ARGS();
2158
2159 switch (open->op_delegate_type) {
2160 case NFS4_OPEN_DELEGATE_NONE:
2161 break;
2162 case NFS4_OPEN_DELEGATE_READ:
2163 RESERVE_SPACE(20 + sizeof(stateid_t));
2164 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2165 WRITE32(open->op_recall);
2166
2167 /*
2168 * TODO: ACE's in delegations
2169 */
2170 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2171 WRITE32(0);
2172 WRITE32(0);
2173 WRITE32(0); /* XXX: is NULL principal ok? */
2174 ADJUST_ARGS();
2175 break;
2176 case NFS4_OPEN_DELEGATE_WRITE:
2177 RESERVE_SPACE(32 + sizeof(stateid_t));
2178 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2179 WRITE32(0);
2180
2181 /*
2182 * TODO: space_limit's in delegations
2183 */
2184 WRITE32(NFS4_LIMIT_SIZE);
2185 WRITE32(~(u32)0);
2186 WRITE32(~(u32)0);
2187
2188 /*
2189 * TODO: ACE's in delegations
2190 */
2191 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2192 WRITE32(0);
2193 WRITE32(0);
2194 WRITE32(0); /* XXX: is NULL principal ok? */
2195 ADJUST_ARGS();
2196 break;
2197 default:
2198 BUG();
2199 }
2200 /* XXX save filehandle here */
2201 out:
2202 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2203 }
2204
2205 static void
2206 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2207 {
2208 ENCODE_SEQID_OP_HEAD;
2209
2210 if (!nfserr) {
2211 RESERVE_SPACE(sizeof(stateid_t));
2212 WRITE32(oc->oc_resp_stateid.si_generation);
2213 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2214 ADJUST_ARGS();
2215 }
2216
2217 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2218 }
2219
2220 static void
2221 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2222 {
2223 ENCODE_SEQID_OP_HEAD;
2224
2225 if (!nfserr) {
2226 RESERVE_SPACE(sizeof(stateid_t));
2227 WRITE32(od->od_stateid.si_generation);
2228 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2229 ADJUST_ARGS();
2230 }
2231
2232 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2233 }
2234
2235 static __be32
2236 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2237 struct nfsd4_read *read)
2238 {
2239 u32 eof;
2240 int v, pn;
2241 unsigned long maxcount;
2242 long len;
2243 ENCODE_HEAD;
2244
2245 if (nfserr)
2246 return nfserr;
2247 if (resp->xbuf->page_len)
2248 return nfserr_resource;
2249
2250 RESERVE_SPACE(8); /* eof flag and byte count */
2251
2252 maxcount = svc_max_payload(resp->rqstp);
2253 if (maxcount > read->rd_length)
2254 maxcount = read->rd_length;
2255
2256 len = maxcount;
2257 v = 0;
2258 while (len > 0) {
2259 pn = resp->rqstp->rq_resused++;
2260 resp->rqstp->rq_vec[v].iov_base =
2261 page_address(resp->rqstp->rq_respages[pn]);
2262 resp->rqstp->rq_vec[v].iov_len =
2263 len < PAGE_SIZE ? len : PAGE_SIZE;
2264 v++;
2265 len -= PAGE_SIZE;
2266 }
2267 read->rd_vlen = v;
2268
2269 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2270 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2271 &maxcount);
2272
2273 if (nfserr == nfserr_symlink)
2274 nfserr = nfserr_inval;
2275 if (nfserr)
2276 return nfserr;
2277 eof = (read->rd_offset + maxcount >=
2278 read->rd_fhp->fh_dentry->d_inode->i_size);
2279
2280 WRITE32(eof);
2281 WRITE32(maxcount);
2282 ADJUST_ARGS();
2283 resp->xbuf->head[0].iov_len = (char*)p
2284 - (char*)resp->xbuf->head[0].iov_base;
2285 resp->xbuf->page_len = maxcount;
2286
2287 /* Use rest of head for padding and remaining ops: */
2288 resp->xbuf->tail[0].iov_base = p;
2289 resp->xbuf->tail[0].iov_len = 0;
2290 if (maxcount&3) {
2291 RESERVE_SPACE(4);
2292 WRITE32(0);
2293 resp->xbuf->tail[0].iov_base += maxcount&3;
2294 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2295 ADJUST_ARGS();
2296 }
2297 return 0;
2298 }
2299
2300 static __be32
2301 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2302 {
2303 int maxcount;
2304 char *page;
2305 ENCODE_HEAD;
2306
2307 if (nfserr)
2308 return nfserr;
2309 if (resp->xbuf->page_len)
2310 return nfserr_resource;
2311
2312 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2313
2314 maxcount = PAGE_SIZE;
2315 RESERVE_SPACE(4);
2316
2317 /*
2318 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2319 * if they would overflow the buffer. Is this kosher in NFSv4? If
2320 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2321 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2322 */
2323 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2324 if (nfserr == nfserr_isdir)
2325 return nfserr_inval;
2326 if (nfserr)
2327 return nfserr;
2328
2329 WRITE32(maxcount);
2330 ADJUST_ARGS();
2331 resp->xbuf->head[0].iov_len = (char*)p
2332 - (char*)resp->xbuf->head[0].iov_base;
2333 resp->xbuf->page_len = maxcount;
2334
2335 /* Use rest of head for padding and remaining ops: */
2336 resp->xbuf->tail[0].iov_base = p;
2337 resp->xbuf->tail[0].iov_len = 0;
2338 if (maxcount&3) {
2339 RESERVE_SPACE(4);
2340 WRITE32(0);
2341 resp->xbuf->tail[0].iov_base += maxcount&3;
2342 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2343 ADJUST_ARGS();
2344 }
2345 return 0;
2346 }
2347
2348 static __be32
2349 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2350 {
2351 int maxcount;
2352 loff_t offset;
2353 __be32 *page, *savep, *tailbase;
2354 ENCODE_HEAD;
2355
2356 if (nfserr)
2357 return nfserr;
2358 if (resp->xbuf->page_len)
2359 return nfserr_resource;
2360
2361 RESERVE_SPACE(8); /* verifier */
2362 savep = p;
2363
2364 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2365 WRITE32(0);
2366 WRITE32(0);
2367 ADJUST_ARGS();
2368 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2369 tailbase = p;
2370
2371 maxcount = PAGE_SIZE;
2372 if (maxcount > readdir->rd_maxcount)
2373 maxcount = readdir->rd_maxcount;
2374
2375 /*
2376 * Convert from bytes to words, account for the two words already
2377 * written, make sure to leave two words at the end for the next
2378 * pointer and eof field.
2379 */
2380 maxcount = (maxcount >> 2) - 4;
2381 if (maxcount < 0) {
2382 nfserr = nfserr_toosmall;
2383 goto err_no_verf;
2384 }
2385
2386 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2387 readdir->common.err = 0;
2388 readdir->buflen = maxcount;
2389 readdir->buffer = page;
2390 readdir->offset = NULL;
2391
2392 offset = readdir->rd_cookie;
2393 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2394 &offset,
2395 &readdir->common, nfsd4_encode_dirent);
2396 if (nfserr == nfs_ok &&
2397 readdir->common.err == nfserr_toosmall &&
2398 readdir->buffer == page)
2399 nfserr = nfserr_toosmall;
2400 if (nfserr == nfserr_symlink)
2401 nfserr = nfserr_notdir;
2402 if (nfserr)
2403 goto err_no_verf;
2404
2405 if (readdir->offset)
2406 xdr_encode_hyper(readdir->offset, offset);
2407
2408 p = readdir->buffer;
2409 *p++ = 0; /* no more entries */
2410 *p++ = htonl(readdir->common.err == nfserr_eof);
2411 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2412 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2413
2414 /* Use rest of head for padding and remaining ops: */
2415 resp->xbuf->tail[0].iov_base = tailbase;
2416 resp->xbuf->tail[0].iov_len = 0;
2417 resp->p = resp->xbuf->tail[0].iov_base;
2418 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2419
2420 return 0;
2421 err_no_verf:
2422 p = savep;
2423 ADJUST_ARGS();
2424 return nfserr;
2425 }
2426
2427 static void
2428 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2429 {
2430 ENCODE_HEAD;
2431
2432 if (!nfserr) {
2433 RESERVE_SPACE(20);
2434 WRITECINFO(remove->rm_cinfo);
2435 ADJUST_ARGS();
2436 }
2437 }
2438
2439 static void
2440 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2441 {
2442 ENCODE_HEAD;
2443
2444 if (!nfserr) {
2445 RESERVE_SPACE(40);
2446 WRITECINFO(rename->rn_sinfo);
2447 WRITECINFO(rename->rn_tinfo);
2448 ADJUST_ARGS();
2449 }
2450 }
2451
2452 static void
2453 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2454 struct nfsd4_secinfo *secinfo)
2455 {
2456 int i = 0;
2457 struct svc_export *exp = secinfo->si_exp;
2458 u32 nflavs;
2459 struct exp_flavor_info *flavs;
2460 struct exp_flavor_info def_flavs[2];
2461 ENCODE_HEAD;
2462
2463 if (nfserr)
2464 goto out;
2465 if (exp->ex_nflavors) {
2466 flavs = exp->ex_flavors;
2467 nflavs = exp->ex_nflavors;
2468 } else { /* Handling of some defaults in absence of real secinfo: */
2469 flavs = def_flavs;
2470 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2471 nflavs = 2;
2472 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2473 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2474 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2475 nflavs = 1;
2476 flavs[0].pseudoflavor
2477 = svcauth_gss_flavor(exp->ex_client);
2478 } else {
2479 nflavs = 1;
2480 flavs[0].pseudoflavor
2481 = exp->ex_client->flavour->flavour;
2482 }
2483 }
2484
2485 RESERVE_SPACE(4);
2486 WRITE32(nflavs);
2487 ADJUST_ARGS();
2488 for (i = 0; i < nflavs; i++) {
2489 u32 flav = flavs[i].pseudoflavor;
2490 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2491
2492 if (gm) {
2493 RESERVE_SPACE(4);
2494 WRITE32(RPC_AUTH_GSS);
2495 ADJUST_ARGS();
2496 RESERVE_SPACE(4 + gm->gm_oid.len);
2497 WRITE32(gm->gm_oid.len);
2498 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2499 ADJUST_ARGS();
2500 RESERVE_SPACE(4);
2501 WRITE32(0); /* qop */
2502 ADJUST_ARGS();
2503 RESERVE_SPACE(4);
2504 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2505 ADJUST_ARGS();
2506 gss_mech_put(gm);
2507 } else {
2508 RESERVE_SPACE(4);
2509 WRITE32(flav);
2510 ADJUST_ARGS();
2511 }
2512 }
2513 out:
2514 if (exp)
2515 exp_put(exp);
2516 }
2517
2518 /*
2519 * The SETATTR encode routine is special -- it always encodes a bitmap,
2520 * regardless of the error status.
2521 */
2522 static void
2523 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2524 {
2525 ENCODE_HEAD;
2526
2527 RESERVE_SPACE(12);
2528 if (nfserr) {
2529 WRITE32(2);
2530 WRITE32(0);
2531 WRITE32(0);
2532 }
2533 else {
2534 WRITE32(2);
2535 WRITE32(setattr->sa_bmval[0]);
2536 WRITE32(setattr->sa_bmval[1]);
2537 }
2538 ADJUST_ARGS();
2539 }
2540
2541 static void
2542 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2543 {
2544 ENCODE_HEAD;
2545
2546 if (!nfserr) {
2547 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2548 WRITEMEM(&scd->se_clientid, 8);
2549 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2550 ADJUST_ARGS();
2551 }
2552 else if (nfserr == nfserr_clid_inuse) {
2553 RESERVE_SPACE(8);
2554 WRITE32(0);
2555 WRITE32(0);
2556 ADJUST_ARGS();
2557 }
2558 }
2559
2560 static void
2561 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2562 {
2563 ENCODE_HEAD;
2564
2565 if (!nfserr) {
2566 RESERVE_SPACE(16);
2567 WRITE32(write->wr_bytes_written);
2568 WRITE32(write->wr_how_written);
2569 WRITEMEM(write->wr_verifier.data, 8);
2570 ADJUST_ARGS();
2571 }
2572 }
2573
2574 void
2575 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2576 {
2577 __be32 *statp;
2578 ENCODE_HEAD;
2579
2580 RESERVE_SPACE(8);
2581 WRITE32(op->opnum);
2582 statp = p++; /* to be backfilled at the end */
2583 ADJUST_ARGS();
2584
2585 switch (op->opnum) {
2586 case OP_ACCESS:
2587 nfsd4_encode_access(resp, op->status, &op->u.access);
2588 break;
2589 case OP_CLOSE:
2590 nfsd4_encode_close(resp, op->status, &op->u.close);
2591 break;
2592 case OP_COMMIT:
2593 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2594 break;
2595 case OP_CREATE:
2596 nfsd4_encode_create(resp, op->status, &op->u.create);
2597 break;
2598 case OP_DELEGRETURN:
2599 break;
2600 case OP_GETATTR:
2601 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2602 break;
2603 case OP_GETFH:
2604 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2605 break;
2606 case OP_LINK:
2607 nfsd4_encode_link(resp, op->status, &op->u.link);
2608 break;
2609 case OP_LOCK:
2610 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2611 break;
2612 case OP_LOCKT:
2613 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2614 break;
2615 case OP_LOCKU:
2616 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2617 break;
2618 case OP_LOOKUP:
2619 break;
2620 case OP_LOOKUPP:
2621 break;
2622 case OP_NVERIFY:
2623 break;
2624 case OP_OPEN:
2625 nfsd4_encode_open(resp, op->status, &op->u.open);
2626 break;
2627 case OP_OPEN_CONFIRM:
2628 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2629 break;
2630 case OP_OPEN_DOWNGRADE:
2631 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2632 break;
2633 case OP_PUTFH:
2634 break;
2635 case OP_PUTROOTFH:
2636 break;
2637 case OP_READ:
2638 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2639 break;
2640 case OP_READDIR:
2641 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2642 break;
2643 case OP_READLINK:
2644 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2645 break;
2646 case OP_REMOVE:
2647 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2648 break;
2649 case OP_RENAME:
2650 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2651 break;
2652 case OP_RENEW:
2653 break;
2654 case OP_RESTOREFH:
2655 break;
2656 case OP_SAVEFH:
2657 break;
2658 case OP_SECINFO:
2659 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
2660 break;
2661 case OP_SETATTR:
2662 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2663 break;
2664 case OP_SETCLIENTID:
2665 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2666 break;
2667 case OP_SETCLIENTID_CONFIRM:
2668 break;
2669 case OP_VERIFY:
2670 break;
2671 case OP_WRITE:
2672 nfsd4_encode_write(resp, op->status, &op->u.write);
2673 break;
2674 case OP_RELEASE_LOCKOWNER:
2675 break;
2676 default:
2677 break;
2678 }
2679
2680 /*
2681 * Note: We write the status directly, instead of using WRITE32(),
2682 * since it is already in network byte order.
2683 */
2684 *statp = op->status;
2685 }
2686
2687 /*
2688 * Encode the reply stored in the stateowner reply cache
2689 *
2690 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2691 * previously sent already encoded operation.
2692 *
2693 * called with nfs4_lock_state() held
2694 */
2695 void
2696 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2697 {
2698 ENCODE_HEAD;
2699 struct nfs4_replay *rp = op->replay;
2700
2701 BUG_ON(!rp);
2702
2703 RESERVE_SPACE(8);
2704 WRITE32(op->opnum);
2705 *p++ = rp->rp_status; /* already xdr'ed */
2706 ADJUST_ARGS();
2707
2708 RESERVE_SPACE(rp->rp_buflen);
2709 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2710 ADJUST_ARGS();
2711 }
2712
2713 /*
2714 * END OF "GENERIC" ENCODE ROUTINES.
2715 */
2716
2717 int
2718 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2719 {
2720 return xdr_ressize_check(rqstp, p);
2721 }
2722
2723 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2724 {
2725 if (args->ops != args->iops) {
2726 kfree(args->ops);
2727 args->ops = args->iops;
2728 }
2729 kfree(args->tmpp);
2730 args->tmpp = NULL;
2731 while (args->to_free) {
2732 struct tmpbuf *tb = args->to_free;
2733 args->to_free = tb->next;
2734 tb->release(tb->buf);
2735 kfree(tb);
2736 }
2737 }
2738
2739 int
2740 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2741 {
2742 __be32 status;
2743
2744 args->p = p;
2745 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2746 args->pagelist = rqstp->rq_arg.pages;
2747 args->pagelen = rqstp->rq_arg.page_len;
2748 args->tmpp = NULL;
2749 args->to_free = NULL;
2750 args->ops = args->iops;
2751 args->rqstp = rqstp;
2752
2753 status = nfsd4_decode_compound(args);
2754 if (status) {
2755 nfsd4_release_compoundargs(args);
2756 }
2757 return !status;
2758 }
2759
2760 int
2761 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
2762 {
2763 /*
2764 * All that remains is to write the tag and operation count...
2765 */
2766 struct kvec *iov;
2767 p = resp->tagp;
2768 *p++ = htonl(resp->taglen);
2769 memcpy(p, resp->tag, resp->taglen);
2770 p += XDR_QUADLEN(resp->taglen);
2771 *p++ = htonl(resp->opcnt);
2772
2773 if (rqstp->rq_res.page_len)
2774 iov = &rqstp->rq_res.tail[0];
2775 else
2776 iov = &rqstp->rq_res.head[0];
2777 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2778 BUG_ON(iov->iov_len > PAGE_SIZE);
2779 return 1;
2780 }
2781
2782 /*
2783 * Local variables:
2784 * c-basic-offset: 8
2785 * End:
2786 */
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