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[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4xdr.c
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
63 static int
64 check_filename(char *str, int len, int err)
65 {
66 int i;
67
68 if (len == 0)
69 return nfserr_inval;
70 if (isdotent(str, len))
71 return err;
72 for (i = 0; i < len; i++)
73 if (str[i] == '/')
74 return err;
75 return 0;
76 }
77
78 /*
79 * START OF "GENERIC" DECODE ROUTINES.
80 * These may look a little ugly since they are imported from a "generic"
81 * set of XDR encode/decode routines which are intended to be shared by
82 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
83 *
84 * If the pain of reading these is too great, it should be a straightforward
85 * task to translate them into Linux-specific versions which are more
86 * consistent with the style used in NFSv2/v3...
87 */
88 #define DECODE_HEAD \
89 u32 *p; \
90 int status
91 #define DECODE_TAIL \
92 status = 0; \
93 out: \
94 return status; \
95 xdr_error: \
96 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
97 status = nfserr_bad_xdr; \
98 goto out
99
100 #define READ32(x) (x) = ntohl(*p++)
101 #define READ64(x) do { \
102 (x) = (u64)ntohl(*p++) << 32; \
103 (x) |= ntohl(*p++); \
104 } while (0)
105 #define READTIME(x) do { \
106 p++; \
107 (x) = ntohl(*p++); \
108 p++; \
109 } while (0)
110 #define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113 } while (0)
114 #define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
118 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
119 goto xdr_error; \
120 } \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123 #define COPYMEM(x,nbytes) do { \
124 memcpy((x), p, nbytes); \
125 p += XDR_QUADLEN(nbytes); \
126 } while (0)
127
128 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
129 #define READ_BUF(nbytes) do { \
130 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
131 p = argp->p; \
132 argp->p += XDR_QUADLEN(nbytes); \
133 } else if (!(p = read_buf(argp, nbytes))) { \
134 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
135 goto xdr_error; \
136 } \
137 } while (0)
138
139 static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
140 {
141 /* We want more bytes than seem to be available.
142 * Maybe we need a new page, maybe we have just run out
143 */
144 int avail = (char*)argp->end - (char*)argp->p;
145 u32 *p;
146 if (avail + argp->pagelen < nbytes)
147 return NULL;
148 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
149 return NULL;
150 /* ok, we can do it with the current plus the next page */
151 if (nbytes <= sizeof(argp->tmp))
152 p = argp->tmp;
153 else {
154 kfree(argp->tmpp);
155 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
156 if (!p)
157 return NULL;
158
159 }
160 memcpy(p, argp->p, avail);
161 /* step to next page */
162 argp->p = page_address(argp->pagelist[0]);
163 argp->pagelist++;
164 if (argp->pagelen < PAGE_SIZE) {
165 argp->end = p + (argp->pagelen>>2);
166 argp->pagelen = 0;
167 } else {
168 argp->end = p + (PAGE_SIZE>>2);
169 argp->pagelen -= PAGE_SIZE;
170 }
171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172 argp->p += XDR_QUADLEN(nbytes - avail);
173 return p;
174 }
175
176 static int
177 defer_free(struct nfsd4_compoundargs *argp,
178 void (*release)(const void *), void *p)
179 {
180 struct tmpbuf *tb;
181
182 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
183 if (!tb)
184 return -ENOMEM;
185 tb->buf = p;
186 tb->release = release;
187 tb->next = argp->to_free;
188 argp->to_free = tb;
189 return 0;
190 }
191
192 static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
193 {
194 void *new = NULL;
195 if (p == argp->tmp) {
196 new = kmalloc(nbytes, GFP_KERNEL);
197 if (!new) return NULL;
198 p = new;
199 memcpy(p, argp->tmp, nbytes);
200 } else {
201 if (p != argp->tmpp)
202 BUG();
203 argp->tmpp = NULL;
204 }
205 if (defer_free(argp, kfree, p)) {
206 kfree(new);
207 return NULL;
208 } else
209 return (char *)p;
210 }
211
212
213 static int
214 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
215 {
216 u32 bmlen;
217 DECODE_HEAD;
218
219 bmval[0] = 0;
220 bmval[1] = 0;
221
222 READ_BUF(4);
223 READ32(bmlen);
224 if (bmlen > 1000)
225 goto xdr_error;
226
227 READ_BUF(bmlen << 2);
228 if (bmlen > 0)
229 READ32(bmval[0]);
230 if (bmlen > 1)
231 READ32(bmval[1]);
232
233 DECODE_TAIL;
234 }
235
236 static int
237 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
238 struct nfs4_acl **acl)
239 {
240 int expected_len, len = 0;
241 u32 dummy32;
242 char *buf;
243
244 DECODE_HEAD;
245 iattr->ia_valid = 0;
246 if ((status = nfsd4_decode_bitmap(argp, bmval)))
247 return status;
248
249 /*
250 * According to spec, unsupported attributes return ERR_NOTSUPP;
251 * read-only attributes return ERR_INVAL.
252 */
253 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
254 return nfserr_attrnotsupp;
255 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
256 return nfserr_inval;
257
258 READ_BUF(4);
259 READ32(expected_len);
260
261 if (bmval[0] & FATTR4_WORD0_SIZE) {
262 READ_BUF(8);
263 len += 8;
264 READ64(iattr->ia_size);
265 iattr->ia_valid |= ATTR_SIZE;
266 }
267 if (bmval[0] & FATTR4_WORD0_ACL) {
268 int nace, i;
269 struct nfs4_ace ace;
270
271 READ_BUF(4); len += 4;
272 READ32(nace);
273
274 *acl = nfs4_acl_new();
275 if (*acl == NULL) {
276 status = -ENOMEM;
277 goto out_nfserr;
278 }
279 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
280
281 for (i = 0; i < nace; i++) {
282 READ_BUF(16); len += 16;
283 READ32(ace.type);
284 READ32(ace.flag);
285 READ32(ace.access_mask);
286 READ32(dummy32);
287 READ_BUF(dummy32);
288 len += XDR_QUADLEN(dummy32) << 2;
289 READMEM(buf, dummy32);
290 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
291 status = 0;
292 if (ace.whotype != NFS4_ACL_WHO_NAMED)
293 ace.who = 0;
294 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
295 status = nfsd_map_name_to_gid(argp->rqstp,
296 buf, dummy32, &ace.who);
297 else
298 status = nfsd_map_name_to_uid(argp->rqstp,
299 buf, dummy32, &ace.who);
300 if (status)
301 goto out_nfserr;
302 status = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
303 ace.access_mask, ace.whotype, ace.who);
304 if (status)
305 goto out_nfserr;
306 }
307 } else
308 *acl = NULL;
309 if (bmval[1] & FATTR4_WORD1_MODE) {
310 READ_BUF(4);
311 len += 4;
312 READ32(iattr->ia_mode);
313 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
314 iattr->ia_valid |= ATTR_MODE;
315 }
316 if (bmval[1] & FATTR4_WORD1_OWNER) {
317 READ_BUF(4);
318 len += 4;
319 READ32(dummy32);
320 READ_BUF(dummy32);
321 len += (XDR_QUADLEN(dummy32) << 2);
322 READMEM(buf, dummy32);
323 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
324 goto out_nfserr;
325 iattr->ia_valid |= ATTR_UID;
326 }
327 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
328 READ_BUF(4);
329 len += 4;
330 READ32(dummy32);
331 READ_BUF(dummy32);
332 len += (XDR_QUADLEN(dummy32) << 2);
333 READMEM(buf, dummy32);
334 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
335 goto out_nfserr;
336 iattr->ia_valid |= ATTR_GID;
337 }
338 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
339 READ_BUF(4);
340 len += 4;
341 READ32(dummy32);
342 switch (dummy32) {
343 case NFS4_SET_TO_CLIENT_TIME:
344 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
345 all 32 bits of 'nseconds'. */
346 READ_BUF(12);
347 len += 12;
348 READ32(dummy32);
349 if (dummy32)
350 return nfserr_inval;
351 READ32(iattr->ia_atime.tv_sec);
352 READ32(iattr->ia_atime.tv_nsec);
353 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
354 return nfserr_inval;
355 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
356 break;
357 case NFS4_SET_TO_SERVER_TIME:
358 iattr->ia_valid |= ATTR_ATIME;
359 break;
360 default:
361 goto xdr_error;
362 }
363 }
364 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
369 READ32(dummy32);
370 if (dummy32)
371 return nfserr_inval;
372 READ32(iattr->ia_ctime.tv_sec);
373 READ32(iattr->ia_ctime.tv_nsec);
374 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
375 return nfserr_inval;
376 iattr->ia_valid |= ATTR_CTIME;
377 }
378 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
379 READ_BUF(4);
380 len += 4;
381 READ32(dummy32);
382 switch (dummy32) {
383 case NFS4_SET_TO_CLIENT_TIME:
384 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
385 all 32 bits of 'nseconds'. */
386 READ_BUF(12);
387 len += 12;
388 READ32(dummy32);
389 if (dummy32)
390 return nfserr_inval;
391 READ32(iattr->ia_mtime.tv_sec);
392 READ32(iattr->ia_mtime.tv_nsec);
393 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
394 return nfserr_inval;
395 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
396 break;
397 case NFS4_SET_TO_SERVER_TIME:
398 iattr->ia_valid |= ATTR_MTIME;
399 break;
400 default:
401 goto xdr_error;
402 }
403 }
404 if (len != expected_len)
405 goto xdr_error;
406
407 DECODE_TAIL;
408
409 out_nfserr:
410 status = nfserrno(status);
411 goto out;
412 }
413
414 static int
415 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
416 {
417 DECODE_HEAD;
418
419 READ_BUF(4);
420 READ32(access->ac_req_access);
421
422 DECODE_TAIL;
423 }
424
425 static int
426 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
427 {
428 DECODE_HEAD;
429
430 close->cl_stateowner = NULL;
431 READ_BUF(4 + sizeof(stateid_t));
432 READ32(close->cl_seqid);
433 READ32(close->cl_stateid.si_generation);
434 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
435
436 DECODE_TAIL;
437 }
438
439
440 static int
441 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
442 {
443 DECODE_HEAD;
444
445 READ_BUF(12);
446 READ64(commit->co_offset);
447 READ32(commit->co_count);
448
449 DECODE_TAIL;
450 }
451
452 static int
453 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
454 {
455 DECODE_HEAD;
456
457 READ_BUF(4);
458 READ32(create->cr_type);
459 switch (create->cr_type) {
460 case NF4LNK:
461 READ_BUF(4);
462 READ32(create->cr_linklen);
463 READ_BUF(create->cr_linklen);
464 SAVEMEM(create->cr_linkname, create->cr_linklen);
465 break;
466 case NF4BLK:
467 case NF4CHR:
468 READ_BUF(8);
469 READ32(create->cr_specdata1);
470 READ32(create->cr_specdata2);
471 break;
472 case NF4SOCK:
473 case NF4FIFO:
474 case NF4DIR:
475 default:
476 break;
477 }
478
479 READ_BUF(4);
480 READ32(create->cr_namelen);
481 READ_BUF(create->cr_namelen);
482 SAVEMEM(create->cr_name, create->cr_namelen);
483 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
484 return status;
485
486 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
487 goto out;
488
489 DECODE_TAIL;
490 }
491
492 static inline int
493 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
494 {
495 DECODE_HEAD;
496
497 READ_BUF(sizeof(stateid_t));
498 READ32(dr->dr_stateid.si_generation);
499 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
500
501 DECODE_TAIL;
502 }
503
504 static inline int
505 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
506 {
507 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
508 }
509
510 static int
511 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
512 {
513 DECODE_HEAD;
514
515 READ_BUF(4);
516 READ32(link->li_namelen);
517 READ_BUF(link->li_namelen);
518 SAVEMEM(link->li_name, link->li_namelen);
519 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
520 return status;
521
522 DECODE_TAIL;
523 }
524
525 static int
526 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
527 {
528 DECODE_HEAD;
529
530 lock->lk_replay_owner = NULL;
531 /*
532 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
533 */
534 READ_BUF(28);
535 READ32(lock->lk_type);
536 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
537 goto xdr_error;
538 READ32(lock->lk_reclaim);
539 READ64(lock->lk_offset);
540 READ64(lock->lk_length);
541 READ32(lock->lk_is_new);
542
543 if (lock->lk_is_new) {
544 READ_BUF(36);
545 READ32(lock->lk_new_open_seqid);
546 READ32(lock->lk_new_open_stateid.si_generation);
547
548 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
549 READ32(lock->lk_new_lock_seqid);
550 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
551 READ32(lock->lk_new_owner.len);
552 READ_BUF(lock->lk_new_owner.len);
553 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
554 } else {
555 READ_BUF(20);
556 READ32(lock->lk_old_lock_stateid.si_generation);
557 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
558 READ32(lock->lk_old_lock_seqid);
559 }
560
561 DECODE_TAIL;
562 }
563
564 static int
565 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
566 {
567 DECODE_HEAD;
568
569 READ_BUF(32);
570 READ32(lockt->lt_type);
571 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
572 goto xdr_error;
573 READ64(lockt->lt_offset);
574 READ64(lockt->lt_length);
575 COPYMEM(&lockt->lt_clientid, 8);
576 READ32(lockt->lt_owner.len);
577 READ_BUF(lockt->lt_owner.len);
578 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
579
580 DECODE_TAIL;
581 }
582
583 static int
584 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
585 {
586 DECODE_HEAD;
587
588 locku->lu_stateowner = NULL;
589 READ_BUF(24 + sizeof(stateid_t));
590 READ32(locku->lu_type);
591 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
592 goto xdr_error;
593 READ32(locku->lu_seqid);
594 READ32(locku->lu_stateid.si_generation);
595 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
596 READ64(locku->lu_offset);
597 READ64(locku->lu_length);
598
599 DECODE_TAIL;
600 }
601
602 static int
603 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
604 {
605 DECODE_HEAD;
606
607 READ_BUF(4);
608 READ32(lookup->lo_len);
609 READ_BUF(lookup->lo_len);
610 SAVEMEM(lookup->lo_name, lookup->lo_len);
611 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
612 return status;
613
614 DECODE_TAIL;
615 }
616
617 static int
618 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
619 {
620 DECODE_HEAD;
621
622 memset(open->op_bmval, 0, sizeof(open->op_bmval));
623 open->op_iattr.ia_valid = 0;
624 open->op_stateowner = NULL;
625
626 /* seqid, share_access, share_deny, clientid, ownerlen */
627 READ_BUF(16 + sizeof(clientid_t));
628 READ32(open->op_seqid);
629 READ32(open->op_share_access);
630 READ32(open->op_share_deny);
631 COPYMEM(&open->op_clientid, sizeof(clientid_t));
632 READ32(open->op_owner.len);
633
634 /* owner, open_flag */
635 READ_BUF(open->op_owner.len + 4);
636 SAVEMEM(open->op_owner.data, open->op_owner.len);
637 READ32(open->op_create);
638 switch (open->op_create) {
639 case NFS4_OPEN_NOCREATE:
640 break;
641 case NFS4_OPEN_CREATE:
642 READ_BUF(4);
643 READ32(open->op_createmode);
644 switch (open->op_createmode) {
645 case NFS4_CREATE_UNCHECKED:
646 case NFS4_CREATE_GUARDED:
647 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
648 goto out;
649 break;
650 case NFS4_CREATE_EXCLUSIVE:
651 READ_BUF(8);
652 COPYMEM(open->op_verf.data, 8);
653 break;
654 default:
655 goto xdr_error;
656 }
657 break;
658 default:
659 goto xdr_error;
660 }
661
662 /* open_claim */
663 READ_BUF(4);
664 READ32(open->op_claim_type);
665 switch (open->op_claim_type) {
666 case NFS4_OPEN_CLAIM_NULL:
667 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
668 READ_BUF(4);
669 READ32(open->op_fname.len);
670 READ_BUF(open->op_fname.len);
671 SAVEMEM(open->op_fname.data, open->op_fname.len);
672 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
673 return status;
674 break;
675 case NFS4_OPEN_CLAIM_PREVIOUS:
676 READ_BUF(4);
677 READ32(open->op_delegate_type);
678 break;
679 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
680 READ_BUF(sizeof(stateid_t) + 4);
681 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
682 READ32(open->op_fname.len);
683 READ_BUF(open->op_fname.len);
684 SAVEMEM(open->op_fname.data, open->op_fname.len);
685 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
686 return status;
687 break;
688 default:
689 goto xdr_error;
690 }
691
692 DECODE_TAIL;
693 }
694
695 static int
696 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
697 {
698 DECODE_HEAD;
699
700 open_conf->oc_stateowner = NULL;
701 READ_BUF(4 + sizeof(stateid_t));
702 READ32(open_conf->oc_req_stateid.si_generation);
703 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
704 READ32(open_conf->oc_seqid);
705
706 DECODE_TAIL;
707 }
708
709 static int
710 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
711 {
712 DECODE_HEAD;
713
714 open_down->od_stateowner = NULL;
715 READ_BUF(12 + sizeof(stateid_t));
716 READ32(open_down->od_stateid.si_generation);
717 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
718 READ32(open_down->od_seqid);
719 READ32(open_down->od_share_access);
720 READ32(open_down->od_share_deny);
721
722 DECODE_TAIL;
723 }
724
725 static int
726 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
727 {
728 DECODE_HEAD;
729
730 READ_BUF(4);
731 READ32(putfh->pf_fhlen);
732 if (putfh->pf_fhlen > NFS4_FHSIZE)
733 goto xdr_error;
734 READ_BUF(putfh->pf_fhlen);
735 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
736
737 DECODE_TAIL;
738 }
739
740 static int
741 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
742 {
743 DECODE_HEAD;
744
745 READ_BUF(sizeof(stateid_t) + 12);
746 READ32(read->rd_stateid.si_generation);
747 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
748 READ64(read->rd_offset);
749 READ32(read->rd_length);
750
751 DECODE_TAIL;
752 }
753
754 static int
755 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
756 {
757 DECODE_HEAD;
758
759 READ_BUF(24);
760 READ64(readdir->rd_cookie);
761 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
762 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
763 READ32(readdir->rd_maxcount);
764 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
765 goto out;
766
767 DECODE_TAIL;
768 }
769
770 static int
771 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
772 {
773 DECODE_HEAD;
774
775 READ_BUF(4);
776 READ32(remove->rm_namelen);
777 READ_BUF(remove->rm_namelen);
778 SAVEMEM(remove->rm_name, remove->rm_namelen);
779 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
780 return status;
781
782 DECODE_TAIL;
783 }
784
785 static int
786 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
787 {
788 DECODE_HEAD;
789
790 READ_BUF(4);
791 READ32(rename->rn_snamelen);
792 READ_BUF(rename->rn_snamelen + 4);
793 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
794 READ32(rename->rn_tnamelen);
795 READ_BUF(rename->rn_tnamelen);
796 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
797 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
798 return status;
799 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
800 return status;
801
802 DECODE_TAIL;
803 }
804
805 static int
806 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
807 {
808 DECODE_HEAD;
809
810 READ_BUF(sizeof(clientid_t));
811 COPYMEM(clientid, sizeof(clientid_t));
812
813 DECODE_TAIL;
814 }
815
816 static int
817 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
818 {
819 DECODE_HEAD;
820
821 READ_BUF(sizeof(stateid_t));
822 READ32(setattr->sa_stateid.si_generation);
823 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
824 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
825 goto out;
826
827 DECODE_TAIL;
828 }
829
830 static int
831 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
832 {
833 DECODE_HEAD;
834
835 READ_BUF(12);
836 COPYMEM(setclientid->se_verf.data, 8);
837 READ32(setclientid->se_namelen);
838
839 READ_BUF(setclientid->se_namelen + 8);
840 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
841 READ32(setclientid->se_callback_prog);
842 READ32(setclientid->se_callback_netid_len);
843
844 READ_BUF(setclientid->se_callback_netid_len + 4);
845 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
846 READ32(setclientid->se_callback_addr_len);
847
848 READ_BUF(setclientid->se_callback_addr_len + 4);
849 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
850 READ32(setclientid->se_callback_ident);
851
852 DECODE_TAIL;
853 }
854
855 static int
856 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
857 {
858 DECODE_HEAD;
859
860 READ_BUF(8 + sizeof(nfs4_verifier));
861 COPYMEM(&scd_c->sc_clientid, 8);
862 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
863
864 DECODE_TAIL;
865 }
866
867 /* Also used for NVERIFY */
868 static int
869 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
870 {
871 #if 0
872 struct nfsd4_compoundargs save = {
873 .p = argp->p,
874 .end = argp->end,
875 .rqstp = argp->rqstp,
876 };
877 u32 ve_bmval[2];
878 struct iattr ve_iattr; /* request */
879 struct nfs4_acl *ve_acl; /* request */
880 #endif
881 DECODE_HEAD;
882
883 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
884 goto out;
885
886 /* For convenience's sake, we compare raw xdr'd attributes in
887 * nfsd4_proc_verify; however we still decode here just to return
888 * correct error in case of bad xdr. */
889 #if 0
890 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
891 if (status == nfserr_inval) {
892 status = nfserrno(status);
893 goto out;
894 }
895 #endif
896 READ_BUF(4);
897 READ32(verify->ve_attrlen);
898 READ_BUF(verify->ve_attrlen);
899 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
900
901 DECODE_TAIL;
902 }
903
904 static int
905 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
906 {
907 int avail;
908 int v;
909 int len;
910 DECODE_HEAD;
911
912 READ_BUF(sizeof(stateid_opaque_t) + 20);
913 READ32(write->wr_stateid.si_generation);
914 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
915 READ64(write->wr_offset);
916 READ32(write->wr_stable_how);
917 if (write->wr_stable_how > 2)
918 goto xdr_error;
919 READ32(write->wr_buflen);
920
921 /* Sorry .. no magic macros for this.. *
922 * READ_BUF(write->wr_buflen);
923 * SAVEMEM(write->wr_buf, write->wr_buflen);
924 */
925 avail = (char*)argp->end - (char*)argp->p;
926 if (avail + argp->pagelen < write->wr_buflen) {
927 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
928 goto xdr_error;
929 }
930 write->wr_vec[0].iov_base = p;
931 write->wr_vec[0].iov_len = avail;
932 v = 0;
933 len = write->wr_buflen;
934 while (len > write->wr_vec[v].iov_len) {
935 len -= write->wr_vec[v].iov_len;
936 v++;
937 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
938 argp->pagelist++;
939 if (argp->pagelen >= PAGE_SIZE) {
940 write->wr_vec[v].iov_len = PAGE_SIZE;
941 argp->pagelen -= PAGE_SIZE;
942 } else {
943 write->wr_vec[v].iov_len = argp->pagelen;
944 argp->pagelen -= len;
945 }
946 }
947 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
948 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
949 write->wr_vec[v].iov_len = len;
950 write->wr_vlen = v+1;
951
952 DECODE_TAIL;
953 }
954
955 static int
956 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
957 {
958 DECODE_HEAD;
959
960 READ_BUF(12);
961 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
962 READ32(rlockowner->rl_owner.len);
963 READ_BUF(rlockowner->rl_owner.len);
964 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
965
966 DECODE_TAIL;
967 }
968
969 static int
970 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
971 {
972 DECODE_HEAD;
973 struct nfsd4_op *op;
974 int i;
975
976 /*
977 * XXX: According to spec, we should check the tag
978 * for UTF-8 compliance. I'm postponing this for
979 * now because it seems that some clients do use
980 * binary tags.
981 */
982 READ_BUF(4);
983 READ32(argp->taglen);
984 READ_BUF(argp->taglen + 8);
985 SAVEMEM(argp->tag, argp->taglen);
986 READ32(argp->minorversion);
987 READ32(argp->opcnt);
988
989 if (argp->taglen > NFSD4_MAX_TAGLEN)
990 goto xdr_error;
991 if (argp->opcnt > 100)
992 goto xdr_error;
993
994 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
995 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
996 if (!argp->ops) {
997 argp->ops = argp->iops;
998 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
999 goto xdr_error;
1000 }
1001 }
1002
1003 for (i = 0; i < argp->opcnt; i++) {
1004 op = &argp->ops[i];
1005 op->replay = NULL;
1006
1007 /*
1008 * We can't use READ_BUF() here because we need to handle
1009 * a missing opcode as an OP_WRITE + 1. So we need to check
1010 * to see if we're truly at the end of our buffer or if there
1011 * is another page we need to flip to.
1012 */
1013
1014 if (argp->p == argp->end) {
1015 if (argp->pagelen < 4) {
1016 /* There isn't an opcode still on the wire */
1017 op->opnum = OP_WRITE + 1;
1018 op->status = nfserr_bad_xdr;
1019 argp->opcnt = i+1;
1020 break;
1021 }
1022
1023 /*
1024 * False alarm. We just hit a page boundary, but there
1025 * is still data available. Move pointer across page
1026 * boundary. *snip from READ_BUF*
1027 */
1028 argp->p = page_address(argp->pagelist[0]);
1029 argp->pagelist++;
1030 if (argp->pagelen < PAGE_SIZE) {
1031 argp->end = p + (argp->pagelen>>2);
1032 argp->pagelen = 0;
1033 } else {
1034 argp->end = p + (PAGE_SIZE>>2);
1035 argp->pagelen -= PAGE_SIZE;
1036 }
1037 }
1038 op->opnum = ntohl(*argp->p++);
1039
1040 switch (op->opnum) {
1041 case 2: /* Reserved operation */
1042 op->opnum = OP_ILLEGAL;
1043 if (argp->minorversion == 0)
1044 op->status = nfserr_op_illegal;
1045 else
1046 op->status = nfserr_minor_vers_mismatch;
1047 break;
1048 case OP_ACCESS:
1049 op->status = nfsd4_decode_access(argp, &op->u.access);
1050 break;
1051 case OP_CLOSE:
1052 op->status = nfsd4_decode_close(argp, &op->u.close);
1053 break;
1054 case OP_COMMIT:
1055 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1056 break;
1057 case OP_CREATE:
1058 op->status = nfsd4_decode_create(argp, &op->u.create);
1059 break;
1060 case OP_DELEGRETURN:
1061 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1062 break;
1063 case OP_GETATTR:
1064 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1065 break;
1066 case OP_GETFH:
1067 op->status = nfs_ok;
1068 break;
1069 case OP_LINK:
1070 op->status = nfsd4_decode_link(argp, &op->u.link);
1071 break;
1072 case OP_LOCK:
1073 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1074 break;
1075 case OP_LOCKT:
1076 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1077 break;
1078 case OP_LOCKU:
1079 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1080 break;
1081 case OP_LOOKUP:
1082 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1083 break;
1084 case OP_LOOKUPP:
1085 op->status = nfs_ok;
1086 break;
1087 case OP_NVERIFY:
1088 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1089 break;
1090 case OP_OPEN:
1091 op->status = nfsd4_decode_open(argp, &op->u.open);
1092 break;
1093 case OP_OPEN_CONFIRM:
1094 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1095 break;
1096 case OP_OPEN_DOWNGRADE:
1097 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1098 break;
1099 case OP_PUTFH:
1100 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1101 break;
1102 case OP_PUTROOTFH:
1103 op->status = nfs_ok;
1104 break;
1105 case OP_READ:
1106 op->status = nfsd4_decode_read(argp, &op->u.read);
1107 break;
1108 case OP_READDIR:
1109 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1110 break;
1111 case OP_READLINK:
1112 op->status = nfs_ok;
1113 break;
1114 case OP_REMOVE:
1115 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1116 break;
1117 case OP_RENAME:
1118 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1119 break;
1120 case OP_RESTOREFH:
1121 op->status = nfs_ok;
1122 break;
1123 case OP_RENEW:
1124 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1125 break;
1126 case OP_SAVEFH:
1127 op->status = nfs_ok;
1128 break;
1129 case OP_SETATTR:
1130 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1131 break;
1132 case OP_SETCLIENTID:
1133 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1134 break;
1135 case OP_SETCLIENTID_CONFIRM:
1136 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1137 break;
1138 case OP_VERIFY:
1139 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1140 break;
1141 case OP_WRITE:
1142 op->status = nfsd4_decode_write(argp, &op->u.write);
1143 break;
1144 case OP_RELEASE_LOCKOWNER:
1145 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1146 break;
1147 default:
1148 op->opnum = OP_ILLEGAL;
1149 op->status = nfserr_op_illegal;
1150 break;
1151 }
1152
1153 if (op->status) {
1154 argp->opcnt = i+1;
1155 break;
1156 }
1157 }
1158
1159 DECODE_TAIL;
1160 }
1161 /*
1162 * END OF "GENERIC" DECODE ROUTINES.
1163 */
1164
1165 /*
1166 * START OF "GENERIC" ENCODE ROUTINES.
1167 * These may look a little ugly since they are imported from a "generic"
1168 * set of XDR encode/decode routines which are intended to be shared by
1169 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1170 *
1171 * If the pain of reading these is too great, it should be a straightforward
1172 * task to translate them into Linux-specific versions which are more
1173 * consistent with the style used in NFSv2/v3...
1174 */
1175 #define ENCODE_HEAD u32 *p
1176
1177 #define WRITE32(n) *p++ = htonl(n)
1178 #define WRITE64(n) do { \
1179 *p++ = htonl((u32)((n) >> 32)); \
1180 *p++ = htonl((u32)(n)); \
1181 } while (0)
1182 #define WRITEMEM(ptr,nbytes) do { \
1183 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1184 memcpy(p, ptr, nbytes); \
1185 p += XDR_QUADLEN(nbytes); \
1186 } while (0)
1187 #define WRITECINFO(c) do { \
1188 *p++ = htonl(c.atomic); \
1189 *p++ = htonl(c.before_ctime_sec); \
1190 *p++ = htonl(c.before_ctime_nsec); \
1191 *p++ = htonl(c.after_ctime_sec); \
1192 *p++ = htonl(c.after_ctime_nsec); \
1193 } while (0)
1194
1195 #define RESERVE_SPACE(nbytes) do { \
1196 p = resp->p; \
1197 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1198 } while (0)
1199 #define ADJUST_ARGS() resp->p = p
1200
1201 /*
1202 * Header routine to setup seqid operation replay cache
1203 */
1204 #define ENCODE_SEQID_OP_HEAD \
1205 u32 *p; \
1206 u32 *save; \
1207 \
1208 save = resp->p;
1209
1210 /*
1211 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1212 * is where sequence id's are incremented, and the replay cache is filled.
1213 * Note that we increment sequence id's here, at the last moment, so we're sure
1214 * we know whether the error to be returned is a sequence id mutating error.
1215 */
1216
1217 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1218 if (seqid_mutating_err(nfserr) && stateowner) { \
1219 stateowner->so_seqid++; \
1220 stateowner->so_replay.rp_status = nfserr; \
1221 stateowner->so_replay.rp_buflen = \
1222 (((char *)(resp)->p - (char *)save)); \
1223 memcpy(stateowner->so_replay.rp_buf, save, \
1224 stateowner->so_replay.rp_buflen); \
1225 } } while (0);
1226
1227
1228 static u32 nfs4_ftypes[16] = {
1229 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1230 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1231 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1232 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1233 };
1234
1235 static int
1236 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1237 u32 **p, int *buflen)
1238 {
1239 int status;
1240
1241 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1242 return nfserr_resource;
1243 if (whotype != NFS4_ACL_WHO_NAMED)
1244 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1245 else if (group)
1246 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1247 else
1248 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1249 if (status < 0)
1250 return nfserrno(status);
1251 *p = xdr_encode_opaque(*p, NULL, status);
1252 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1253 BUG_ON(*buflen < 0);
1254 return 0;
1255 }
1256
1257 static inline int
1258 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1259 {
1260 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1261 }
1262
1263 static inline int
1264 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1265 {
1266 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1267 }
1268
1269 static inline int
1270 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1271 u32 **p, int *buflen)
1272 {
1273 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1274 }
1275
1276
1277 /*
1278 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1279 * ourselves.
1280 *
1281 * @countp is the buffer size in _words_; upon successful return this becomes
1282 * replaced with the number of words written.
1283 */
1284 int
1285 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1286 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1287 struct svc_rqst *rqstp)
1288 {
1289 u32 bmval0 = bmval[0];
1290 u32 bmval1 = bmval[1];
1291 struct kstat stat;
1292 struct svc_fh tempfh;
1293 struct kstatfs statfs;
1294 int buflen = *countp << 2;
1295 u32 *attrlenp;
1296 u32 dummy;
1297 u64 dummy64;
1298 u32 *p = buffer;
1299 int status;
1300 int aclsupport = 0;
1301 struct nfs4_acl *acl = NULL;
1302
1303 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1304 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1305 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1306
1307 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1308 if (status)
1309 goto out_nfserr;
1310 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1311 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1312 FATTR4_WORD1_SPACE_TOTAL))) {
1313 status = vfs_statfs(dentry, &statfs);
1314 if (status)
1315 goto out_nfserr;
1316 }
1317 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1318 fh_init(&tempfh, NFS4_FHSIZE);
1319 status = fh_compose(&tempfh, exp, dentry, NULL);
1320 if (status)
1321 goto out;
1322 fhp = &tempfh;
1323 }
1324 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1325 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1326 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1327 aclsupport = (status == 0);
1328 if (bmval0 & FATTR4_WORD0_ACL) {
1329 if (status == -EOPNOTSUPP)
1330 bmval0 &= ~FATTR4_WORD0_ACL;
1331 else if (status == -EINVAL) {
1332 status = nfserr_attrnotsupp;
1333 goto out;
1334 } else if (status != 0)
1335 goto out_nfserr;
1336 }
1337 }
1338 if ((buflen -= 16) < 0)
1339 goto out_resource;
1340
1341 WRITE32(2);
1342 WRITE32(bmval0);
1343 WRITE32(bmval1);
1344 attrlenp = p++; /* to be backfilled later */
1345
1346 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1347 if ((buflen -= 12) < 0)
1348 goto out_resource;
1349 WRITE32(2);
1350 WRITE32(aclsupport ?
1351 NFSD_SUPPORTED_ATTRS_WORD0 :
1352 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1353 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1354 }
1355 if (bmval0 & FATTR4_WORD0_TYPE) {
1356 if ((buflen -= 4) < 0)
1357 goto out_resource;
1358 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1359 if (dummy == NF4BAD)
1360 goto out_serverfault;
1361 WRITE32(dummy);
1362 }
1363 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1364 if ((buflen -= 4) < 0)
1365 goto out_resource;
1366 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1367 WRITE32(NFS4_FH_PERSISTENT);
1368 else
1369 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1370 }
1371 if (bmval0 & FATTR4_WORD0_CHANGE) {
1372 /*
1373 * Note: This _must_ be consistent with the scheme for writing
1374 * change_info, so any changes made here must be reflected there
1375 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1376 * macro above.)
1377 */
1378 if ((buflen -= 8) < 0)
1379 goto out_resource;
1380 WRITE32(stat.ctime.tv_sec);
1381 WRITE32(stat.ctime.tv_nsec);
1382 }
1383 if (bmval0 & FATTR4_WORD0_SIZE) {
1384 if ((buflen -= 8) < 0)
1385 goto out_resource;
1386 WRITE64(stat.size);
1387 }
1388 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1389 if ((buflen -= 4) < 0)
1390 goto out_resource;
1391 WRITE32(1);
1392 }
1393 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1394 if ((buflen -= 4) < 0)
1395 goto out_resource;
1396 WRITE32(1);
1397 }
1398 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1399 if ((buflen -= 4) < 0)
1400 goto out_resource;
1401 WRITE32(0);
1402 }
1403 if (bmval0 & FATTR4_WORD0_FSID) {
1404 if ((buflen -= 16) < 0)
1405 goto out_resource;
1406 if (is_fsid(fhp, rqstp->rq_reffh)) {
1407 WRITE64((u64)exp->ex_fsid);
1408 WRITE64((u64)0);
1409 } else {
1410 WRITE32(0);
1411 WRITE32(MAJOR(stat.dev));
1412 WRITE32(0);
1413 WRITE32(MINOR(stat.dev));
1414 }
1415 }
1416 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1417 if ((buflen -= 4) < 0)
1418 goto out_resource;
1419 WRITE32(0);
1420 }
1421 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1422 if ((buflen -= 4) < 0)
1423 goto out_resource;
1424 WRITE32(NFSD_LEASE_TIME);
1425 }
1426 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1427 if ((buflen -= 4) < 0)
1428 goto out_resource;
1429 WRITE32(0);
1430 }
1431 if (bmval0 & FATTR4_WORD0_ACL) {
1432 struct nfs4_ace *ace;
1433 struct list_head *h;
1434
1435 if (acl == NULL) {
1436 if ((buflen -= 4) < 0)
1437 goto out_resource;
1438
1439 WRITE32(0);
1440 goto out_acl;
1441 }
1442 if ((buflen -= 4) < 0)
1443 goto out_resource;
1444 WRITE32(acl->naces);
1445
1446 list_for_each(h, &acl->ace_head) {
1447 ace = list_entry(h, struct nfs4_ace, l_ace);
1448
1449 if ((buflen -= 4*3) < 0)
1450 goto out_resource;
1451 WRITE32(ace->type);
1452 WRITE32(ace->flag);
1453 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1454 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1455 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1456 &p, &buflen);
1457 if (status == nfserr_resource)
1458 goto out_resource;
1459 if (status)
1460 goto out;
1461 }
1462 }
1463 out_acl:
1464 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1465 if ((buflen -= 4) < 0)
1466 goto out_resource;
1467 WRITE32(aclsupport ?
1468 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1469 }
1470 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1471 if ((buflen -= 4) < 0)
1472 goto out_resource;
1473 WRITE32(1);
1474 }
1475 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1476 if ((buflen -= 4) < 0)
1477 goto out_resource;
1478 WRITE32(1);
1479 }
1480 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1481 if ((buflen -= 4) < 0)
1482 goto out_resource;
1483 WRITE32(1);
1484 }
1485 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1486 if ((buflen -= 4) < 0)
1487 goto out_resource;
1488 WRITE32(1);
1489 }
1490 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1491 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1492 if (buflen < 0)
1493 goto out_resource;
1494 WRITE32(fhp->fh_handle.fh_size);
1495 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1496 }
1497 if (bmval0 & FATTR4_WORD0_FILEID) {
1498 if ((buflen -= 8) < 0)
1499 goto out_resource;
1500 WRITE64((u64) stat.ino);
1501 }
1502 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1503 if ((buflen -= 8) < 0)
1504 goto out_resource;
1505 WRITE64((u64) statfs.f_ffree);
1506 }
1507 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1508 if ((buflen -= 8) < 0)
1509 goto out_resource;
1510 WRITE64((u64) statfs.f_ffree);
1511 }
1512 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1513 if ((buflen -= 8) < 0)
1514 goto out_resource;
1515 WRITE64((u64) statfs.f_files);
1516 }
1517 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1518 if ((buflen -= 4) < 0)
1519 goto out_resource;
1520 WRITE32(1);
1521 }
1522 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1523 if ((buflen -= 8) < 0)
1524 goto out_resource;
1525 WRITE64(~(u64)0);
1526 }
1527 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1528 if ((buflen -= 4) < 0)
1529 goto out_resource;
1530 WRITE32(255);
1531 }
1532 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1533 if ((buflen -= 4) < 0)
1534 goto out_resource;
1535 WRITE32(~(u32) 0);
1536 }
1537 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1538 if ((buflen -= 8) < 0)
1539 goto out_resource;
1540 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1541 }
1542 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1543 if ((buflen -= 8) < 0)
1544 goto out_resource;
1545 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1546 }
1547 if (bmval1 & FATTR4_WORD1_MODE) {
1548 if ((buflen -= 4) < 0)
1549 goto out_resource;
1550 WRITE32(stat.mode & S_IALLUGO);
1551 }
1552 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1553 if ((buflen -= 4) < 0)
1554 goto out_resource;
1555 WRITE32(1);
1556 }
1557 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1558 if ((buflen -= 4) < 0)
1559 goto out_resource;
1560 WRITE32(stat.nlink);
1561 }
1562 if (bmval1 & FATTR4_WORD1_OWNER) {
1563 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1564 if (status == nfserr_resource)
1565 goto out_resource;
1566 if (status)
1567 goto out;
1568 }
1569 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1570 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1571 if (status == nfserr_resource)
1572 goto out_resource;
1573 if (status)
1574 goto out;
1575 }
1576 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1577 if ((buflen -= 8) < 0)
1578 goto out_resource;
1579 WRITE32((u32) MAJOR(stat.rdev));
1580 WRITE32((u32) MINOR(stat.rdev));
1581 }
1582 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1583 if ((buflen -= 8) < 0)
1584 goto out_resource;
1585 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1586 WRITE64(dummy64);
1587 }
1588 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1589 if ((buflen -= 8) < 0)
1590 goto out_resource;
1591 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1592 WRITE64(dummy64);
1593 }
1594 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1595 if ((buflen -= 8) < 0)
1596 goto out_resource;
1597 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1598 WRITE64(dummy64);
1599 }
1600 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1601 if ((buflen -= 8) < 0)
1602 goto out_resource;
1603 dummy64 = (u64)stat.blocks << 9;
1604 WRITE64(dummy64);
1605 }
1606 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1607 if ((buflen -= 12) < 0)
1608 goto out_resource;
1609 WRITE32(0);
1610 WRITE32(stat.atime.tv_sec);
1611 WRITE32(stat.atime.tv_nsec);
1612 }
1613 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1614 if ((buflen -= 12) < 0)
1615 goto out_resource;
1616 WRITE32(0);
1617 WRITE32(1);
1618 WRITE32(0);
1619 }
1620 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1621 if ((buflen -= 12) < 0)
1622 goto out_resource;
1623 WRITE32(0);
1624 WRITE32(stat.ctime.tv_sec);
1625 WRITE32(stat.ctime.tv_nsec);
1626 }
1627 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1628 if ((buflen -= 12) < 0)
1629 goto out_resource;
1630 WRITE32(0);
1631 WRITE32(stat.mtime.tv_sec);
1632 WRITE32(stat.mtime.tv_nsec);
1633 }
1634 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1635 struct dentry *mnt_pnt, *mnt_root;
1636
1637 if ((buflen -= 8) < 0)
1638 goto out_resource;
1639 mnt_root = exp->ex_mnt->mnt_root;
1640 if (mnt_root->d_inode == dentry->d_inode) {
1641 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1642 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1643 } else
1644 WRITE64((u64) stat.ino);
1645 }
1646 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1647 *countp = p - buffer;
1648 status = nfs_ok;
1649
1650 out:
1651 nfs4_acl_free(acl);
1652 if (fhp == &tempfh)
1653 fh_put(&tempfh);
1654 return status;
1655 out_nfserr:
1656 status = nfserrno(status);
1657 goto out;
1658 out_resource:
1659 *countp = 0;
1660 status = nfserr_resource;
1661 goto out;
1662 out_serverfault:
1663 status = nfserr_serverfault;
1664 goto out;
1665 }
1666
1667 static int
1668 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1669 const char *name, int namlen, u32 *p, int *buflen)
1670 {
1671 struct svc_export *exp = cd->rd_fhp->fh_export;
1672 struct dentry *dentry;
1673 int nfserr;
1674
1675 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1676 if (IS_ERR(dentry))
1677 return nfserrno(PTR_ERR(dentry));
1678
1679 exp_get(exp);
1680 if (d_mountpoint(dentry)) {
1681 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1682 /*
1683 * -EAGAIN is the only error returned from
1684 * nfsd_cross_mnt() and it indicates that an
1685 * up-call has been initiated to fill in the export
1686 * options on exp. When the answer comes back,
1687 * this call will be retried.
1688 */
1689 nfserr = nfserr_dropit;
1690 goto out_put;
1691 }
1692
1693 }
1694 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1695 cd->rd_rqstp);
1696 out_put:
1697 dput(dentry);
1698 exp_put(exp);
1699 return nfserr;
1700 }
1701
1702 static u32 *
1703 nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1704 {
1705 u32 *attrlenp;
1706
1707 if (buflen < 6)
1708 return NULL;
1709 *p++ = htonl(2);
1710 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1711 *p++ = htonl(0); /* bmval1 */
1712
1713 attrlenp = p++;
1714 *p++ = nfserr; /* no htonl */
1715 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1716 return p;
1717 }
1718
1719 static int
1720 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1721 loff_t offset, ino_t ino, unsigned int d_type)
1722 {
1723 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1724 int buflen;
1725 u32 *p = cd->buffer;
1726 int nfserr = nfserr_toosmall;
1727
1728 /* In nfsv4, "." and ".." never make it onto the wire.. */
1729 if (name && isdotent(name, namlen)) {
1730 cd->common.err = nfs_ok;
1731 return 0;
1732 }
1733
1734 if (cd->offset)
1735 xdr_encode_hyper(cd->offset, (u64) offset);
1736
1737 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1738 if (buflen < 0)
1739 goto fail;
1740
1741 *p++ = xdr_one; /* mark entry present */
1742 cd->offset = p; /* remember pointer */
1743 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1744 p = xdr_encode_array(p, name, namlen); /* name length & name */
1745
1746 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1747 switch (nfserr) {
1748 case nfs_ok:
1749 p += buflen;
1750 break;
1751 case nfserr_resource:
1752 nfserr = nfserr_toosmall;
1753 goto fail;
1754 case nfserr_dropit:
1755 goto fail;
1756 default:
1757 /*
1758 * If the client requested the RDATTR_ERROR attribute,
1759 * we stuff the error code into this attribute
1760 * and continue. If this attribute was not requested,
1761 * then in accordance with the spec, we fail the
1762 * entire READDIR operation(!)
1763 */
1764 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1765 goto fail;
1766 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1767 if (p == NULL) {
1768 nfserr = nfserr_toosmall;
1769 goto fail;
1770 }
1771 }
1772 cd->buflen -= (p - cd->buffer);
1773 cd->buffer = p;
1774 cd->common.err = nfs_ok;
1775 return 0;
1776 fail:
1777 cd->common.err = nfserr;
1778 return -EINVAL;
1779 }
1780
1781 static void
1782 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1783 {
1784 ENCODE_HEAD;
1785
1786 if (!nfserr) {
1787 RESERVE_SPACE(8);
1788 WRITE32(access->ac_supported);
1789 WRITE32(access->ac_resp_access);
1790 ADJUST_ARGS();
1791 }
1792 }
1793
1794 static void
1795 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1796 {
1797 ENCODE_SEQID_OP_HEAD;
1798
1799 if (!nfserr) {
1800 RESERVE_SPACE(sizeof(stateid_t));
1801 WRITE32(close->cl_stateid.si_generation);
1802 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1803 ADJUST_ARGS();
1804 }
1805 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1806 }
1807
1808
1809 static void
1810 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1811 {
1812 ENCODE_HEAD;
1813
1814 if (!nfserr) {
1815 RESERVE_SPACE(8);
1816 WRITEMEM(commit->co_verf.data, 8);
1817 ADJUST_ARGS();
1818 }
1819 }
1820
1821 static void
1822 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1823 {
1824 ENCODE_HEAD;
1825
1826 if (!nfserr) {
1827 RESERVE_SPACE(32);
1828 WRITECINFO(create->cr_cinfo);
1829 WRITE32(2);
1830 WRITE32(create->cr_bmval[0]);
1831 WRITE32(create->cr_bmval[1]);
1832 ADJUST_ARGS();
1833 }
1834 }
1835
1836 static int
1837 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1838 {
1839 struct svc_fh *fhp = getattr->ga_fhp;
1840 int buflen;
1841
1842 if (nfserr)
1843 return nfserr;
1844
1845 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1846 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1847 resp->p, &buflen, getattr->ga_bmval,
1848 resp->rqstp);
1849
1850 if (!nfserr)
1851 resp->p += buflen;
1852 return nfserr;
1853 }
1854
1855 static void
1856 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1857 {
1858 unsigned int len;
1859 ENCODE_HEAD;
1860
1861 if (!nfserr) {
1862 len = fhp->fh_handle.fh_size;
1863 RESERVE_SPACE(len + 4);
1864 WRITE32(len);
1865 WRITEMEM(&fhp->fh_handle.fh_base, len);
1866 ADJUST_ARGS();
1867 }
1868 }
1869
1870 /*
1871 * Including all fields other than the name, a LOCK4denied structure requires
1872 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1873 */
1874 static void
1875 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1876 {
1877 ENCODE_HEAD;
1878
1879 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1880 WRITE64(ld->ld_start);
1881 WRITE64(ld->ld_length);
1882 WRITE32(ld->ld_type);
1883 if (ld->ld_sop) {
1884 WRITEMEM(&ld->ld_clientid, 8);
1885 WRITE32(ld->ld_sop->so_owner.len);
1886 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1887 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
1888 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
1889 WRITE64((u64)0); /* clientid */
1890 WRITE32(0); /* length of owner name */
1891 }
1892 ADJUST_ARGS();
1893 }
1894
1895 static void
1896 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1897 {
1898 ENCODE_SEQID_OP_HEAD;
1899
1900 if (!nfserr) {
1901 RESERVE_SPACE(4 + sizeof(stateid_t));
1902 WRITE32(lock->lk_resp_stateid.si_generation);
1903 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1904 ADJUST_ARGS();
1905 } else if (nfserr == nfserr_denied)
1906 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1907
1908 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1909 }
1910
1911 static void
1912 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1913 {
1914 if (nfserr == nfserr_denied)
1915 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1916 }
1917
1918 static void
1919 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1920 {
1921 ENCODE_SEQID_OP_HEAD;
1922
1923 if (!nfserr) {
1924 RESERVE_SPACE(sizeof(stateid_t));
1925 WRITE32(locku->lu_stateid.si_generation);
1926 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1927 ADJUST_ARGS();
1928 }
1929
1930 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1931 }
1932
1933
1934 static void
1935 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1936 {
1937 ENCODE_HEAD;
1938
1939 if (!nfserr) {
1940 RESERVE_SPACE(20);
1941 WRITECINFO(link->li_cinfo);
1942 ADJUST_ARGS();
1943 }
1944 }
1945
1946
1947 static void
1948 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1949 {
1950 ENCODE_SEQID_OP_HEAD;
1951
1952 if (nfserr)
1953 goto out;
1954
1955 RESERVE_SPACE(36 + sizeof(stateid_t));
1956 WRITE32(open->op_stateid.si_generation);
1957 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1958 WRITECINFO(open->op_cinfo);
1959 WRITE32(open->op_rflags);
1960 WRITE32(2);
1961 WRITE32(open->op_bmval[0]);
1962 WRITE32(open->op_bmval[1]);
1963 WRITE32(open->op_delegate_type);
1964 ADJUST_ARGS();
1965
1966 switch (open->op_delegate_type) {
1967 case NFS4_OPEN_DELEGATE_NONE:
1968 break;
1969 case NFS4_OPEN_DELEGATE_READ:
1970 RESERVE_SPACE(20 + sizeof(stateid_t));
1971 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1972 WRITE32(open->op_recall);
1973
1974 /*
1975 * TODO: ACE's in delegations
1976 */
1977 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1978 WRITE32(0);
1979 WRITE32(0);
1980 WRITE32(0); /* XXX: is NULL principal ok? */
1981 ADJUST_ARGS();
1982 break;
1983 case NFS4_OPEN_DELEGATE_WRITE:
1984 RESERVE_SPACE(32 + sizeof(stateid_t));
1985 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1986 WRITE32(0);
1987
1988 /*
1989 * TODO: space_limit's in delegations
1990 */
1991 WRITE32(NFS4_LIMIT_SIZE);
1992 WRITE32(~(u32)0);
1993 WRITE32(~(u32)0);
1994
1995 /*
1996 * TODO: ACE's in delegations
1997 */
1998 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1999 WRITE32(0);
2000 WRITE32(0);
2001 WRITE32(0); /* XXX: is NULL principal ok? */
2002 ADJUST_ARGS();
2003 break;
2004 default:
2005 BUG();
2006 }
2007 /* XXX save filehandle here */
2008 out:
2009 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2010 }
2011
2012 static void
2013 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2014 {
2015 ENCODE_SEQID_OP_HEAD;
2016
2017 if (!nfserr) {
2018 RESERVE_SPACE(sizeof(stateid_t));
2019 WRITE32(oc->oc_resp_stateid.si_generation);
2020 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2021 ADJUST_ARGS();
2022 }
2023
2024 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2025 }
2026
2027 static void
2028 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2029 {
2030 ENCODE_SEQID_OP_HEAD;
2031
2032 if (!nfserr) {
2033 RESERVE_SPACE(sizeof(stateid_t));
2034 WRITE32(od->od_stateid.si_generation);
2035 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2036 ADJUST_ARGS();
2037 }
2038
2039 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2040 }
2041
2042 static int
2043 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2044 {
2045 u32 eof;
2046 int v, pn;
2047 unsigned long maxcount;
2048 long len;
2049 ENCODE_HEAD;
2050
2051 if (nfserr)
2052 return nfserr;
2053 if (resp->xbuf->page_len)
2054 return nfserr_resource;
2055
2056 RESERVE_SPACE(8); /* eof flag and byte count */
2057
2058 maxcount = NFSSVC_MAXBLKSIZE;
2059 if (maxcount > read->rd_length)
2060 maxcount = read->rd_length;
2061
2062 len = maxcount;
2063 v = 0;
2064 while (len > 0) {
2065 pn = resp->rqstp->rq_resused;
2066 svc_take_page(resp->rqstp);
2067 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2068 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2069 v++;
2070 len -= PAGE_SIZE;
2071 }
2072 read->rd_vlen = v;
2073
2074 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2075 read->rd_offset, read->rd_iov, read->rd_vlen,
2076 &maxcount);
2077
2078 if (nfserr == nfserr_symlink)
2079 nfserr = nfserr_inval;
2080 if (nfserr)
2081 return nfserr;
2082 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2083
2084 WRITE32(eof);
2085 WRITE32(maxcount);
2086 ADJUST_ARGS();
2087 resp->xbuf->head[0].iov_len = (char*)p
2088 - (char*)resp->xbuf->head[0].iov_base;
2089 resp->xbuf->page_len = maxcount;
2090
2091 /* Use rest of head for padding and remaining ops: */
2092 resp->rqstp->rq_restailpage = 0;
2093 resp->xbuf->tail[0].iov_base = p;
2094 resp->xbuf->tail[0].iov_len = 0;
2095 if (maxcount&3) {
2096 RESERVE_SPACE(4);
2097 WRITE32(0);
2098 resp->xbuf->tail[0].iov_base += maxcount&3;
2099 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2100 ADJUST_ARGS();
2101 }
2102 return 0;
2103 }
2104
2105 static int
2106 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2107 {
2108 int maxcount;
2109 char *page;
2110 ENCODE_HEAD;
2111
2112 if (nfserr)
2113 return nfserr;
2114 if (resp->xbuf->page_len)
2115 return nfserr_resource;
2116
2117 svc_take_page(resp->rqstp);
2118 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2119
2120 maxcount = PAGE_SIZE;
2121 RESERVE_SPACE(4);
2122
2123 /*
2124 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2125 * if they would overflow the buffer. Is this kosher in NFSv4? If
2126 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2127 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2128 */
2129 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2130 if (nfserr == nfserr_isdir)
2131 return nfserr_inval;
2132 if (nfserr)
2133 return nfserr;
2134
2135 WRITE32(maxcount);
2136 ADJUST_ARGS();
2137 resp->xbuf->head[0].iov_len = (char*)p
2138 - (char*)resp->xbuf->head[0].iov_base;
2139 resp->xbuf->page_len = maxcount;
2140
2141 /* Use rest of head for padding and remaining ops: */
2142 resp->rqstp->rq_restailpage = 0;
2143 resp->xbuf->tail[0].iov_base = p;
2144 resp->xbuf->tail[0].iov_len = 0;
2145 if (maxcount&3) {
2146 RESERVE_SPACE(4);
2147 WRITE32(0);
2148 resp->xbuf->tail[0].iov_base += maxcount&3;
2149 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2150 ADJUST_ARGS();
2151 }
2152 return 0;
2153 }
2154
2155 static int
2156 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2157 {
2158 int maxcount;
2159 loff_t offset;
2160 u32 *page, *savep, *tailbase;
2161 ENCODE_HEAD;
2162
2163 if (nfserr)
2164 return nfserr;
2165 if (resp->xbuf->page_len)
2166 return nfserr_resource;
2167
2168 RESERVE_SPACE(8); /* verifier */
2169 savep = p;
2170
2171 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2172 WRITE32(0);
2173 WRITE32(0);
2174 ADJUST_ARGS();
2175 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2176 tailbase = p;
2177
2178 maxcount = PAGE_SIZE;
2179 if (maxcount > readdir->rd_maxcount)
2180 maxcount = readdir->rd_maxcount;
2181
2182 /*
2183 * Convert from bytes to words, account for the two words already
2184 * written, make sure to leave two words at the end for the next
2185 * pointer and eof field.
2186 */
2187 maxcount = (maxcount >> 2) - 4;
2188 if (maxcount < 0) {
2189 nfserr = nfserr_toosmall;
2190 goto err_no_verf;
2191 }
2192
2193 svc_take_page(resp->rqstp);
2194 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2195 readdir->common.err = 0;
2196 readdir->buflen = maxcount;
2197 readdir->buffer = page;
2198 readdir->offset = NULL;
2199
2200 offset = readdir->rd_cookie;
2201 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2202 &offset,
2203 &readdir->common, nfsd4_encode_dirent);
2204 if (nfserr == nfs_ok &&
2205 readdir->common.err == nfserr_toosmall &&
2206 readdir->buffer == page)
2207 nfserr = nfserr_toosmall;
2208 if (nfserr == nfserr_symlink)
2209 nfserr = nfserr_notdir;
2210 if (nfserr)
2211 goto err_no_verf;
2212
2213 if (readdir->offset)
2214 xdr_encode_hyper(readdir->offset, offset);
2215
2216 p = readdir->buffer;
2217 *p++ = 0; /* no more entries */
2218 *p++ = htonl(readdir->common.err == nfserr_eof);
2219 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2220
2221 /* Use rest of head for padding and remaining ops: */
2222 resp->rqstp->rq_restailpage = 0;
2223 resp->xbuf->tail[0].iov_base = tailbase;
2224 resp->xbuf->tail[0].iov_len = 0;
2225 resp->p = resp->xbuf->tail[0].iov_base;
2226 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2227
2228 return 0;
2229 err_no_verf:
2230 p = savep;
2231 ADJUST_ARGS();
2232 return nfserr;
2233 }
2234
2235 static void
2236 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2237 {
2238 ENCODE_HEAD;
2239
2240 if (!nfserr) {
2241 RESERVE_SPACE(20);
2242 WRITECINFO(remove->rm_cinfo);
2243 ADJUST_ARGS();
2244 }
2245 }
2246
2247 static void
2248 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2249 {
2250 ENCODE_HEAD;
2251
2252 if (!nfserr) {
2253 RESERVE_SPACE(40);
2254 WRITECINFO(rename->rn_sinfo);
2255 WRITECINFO(rename->rn_tinfo);
2256 ADJUST_ARGS();
2257 }
2258 }
2259
2260 /*
2261 * The SETATTR encode routine is special -- it always encodes a bitmap,
2262 * regardless of the error status.
2263 */
2264 static void
2265 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2266 {
2267 ENCODE_HEAD;
2268
2269 RESERVE_SPACE(12);
2270 if (nfserr) {
2271 WRITE32(2);
2272 WRITE32(0);
2273 WRITE32(0);
2274 }
2275 else {
2276 WRITE32(2);
2277 WRITE32(setattr->sa_bmval[0]);
2278 WRITE32(setattr->sa_bmval[1]);
2279 }
2280 ADJUST_ARGS();
2281 }
2282
2283 static void
2284 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2285 {
2286 ENCODE_HEAD;
2287
2288 if (!nfserr) {
2289 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2290 WRITEMEM(&scd->se_clientid, 8);
2291 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2292 ADJUST_ARGS();
2293 }
2294 else if (nfserr == nfserr_clid_inuse) {
2295 RESERVE_SPACE(8);
2296 WRITE32(0);
2297 WRITE32(0);
2298 ADJUST_ARGS();
2299 }
2300 }
2301
2302 static void
2303 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2304 {
2305 ENCODE_HEAD;
2306
2307 if (!nfserr) {
2308 RESERVE_SPACE(16);
2309 WRITE32(write->wr_bytes_written);
2310 WRITE32(write->wr_how_written);
2311 WRITEMEM(write->wr_verifier.data, 8);
2312 ADJUST_ARGS();
2313 }
2314 }
2315
2316 void
2317 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2318 {
2319 u32 *statp;
2320 ENCODE_HEAD;
2321
2322 RESERVE_SPACE(8);
2323 WRITE32(op->opnum);
2324 statp = p++; /* to be backfilled at the end */
2325 ADJUST_ARGS();
2326
2327 switch (op->opnum) {
2328 case OP_ACCESS:
2329 nfsd4_encode_access(resp, op->status, &op->u.access);
2330 break;
2331 case OP_CLOSE:
2332 nfsd4_encode_close(resp, op->status, &op->u.close);
2333 break;
2334 case OP_COMMIT:
2335 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2336 break;
2337 case OP_CREATE:
2338 nfsd4_encode_create(resp, op->status, &op->u.create);
2339 break;
2340 case OP_DELEGRETURN:
2341 break;
2342 case OP_GETATTR:
2343 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2344 break;
2345 case OP_GETFH:
2346 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2347 break;
2348 case OP_LINK:
2349 nfsd4_encode_link(resp, op->status, &op->u.link);
2350 break;
2351 case OP_LOCK:
2352 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2353 break;
2354 case OP_LOCKT:
2355 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2356 break;
2357 case OP_LOCKU:
2358 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2359 break;
2360 case OP_LOOKUP:
2361 break;
2362 case OP_LOOKUPP:
2363 break;
2364 case OP_NVERIFY:
2365 break;
2366 case OP_OPEN:
2367 nfsd4_encode_open(resp, op->status, &op->u.open);
2368 break;
2369 case OP_OPEN_CONFIRM:
2370 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2371 break;
2372 case OP_OPEN_DOWNGRADE:
2373 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2374 break;
2375 case OP_PUTFH:
2376 break;
2377 case OP_PUTROOTFH:
2378 break;
2379 case OP_READ:
2380 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2381 break;
2382 case OP_READDIR:
2383 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2384 break;
2385 case OP_READLINK:
2386 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2387 break;
2388 case OP_REMOVE:
2389 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2390 break;
2391 case OP_RENAME:
2392 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2393 break;
2394 case OP_RENEW:
2395 break;
2396 case OP_RESTOREFH:
2397 break;
2398 case OP_SAVEFH:
2399 break;
2400 case OP_SETATTR:
2401 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2402 break;
2403 case OP_SETCLIENTID:
2404 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2405 break;
2406 case OP_SETCLIENTID_CONFIRM:
2407 break;
2408 case OP_VERIFY:
2409 break;
2410 case OP_WRITE:
2411 nfsd4_encode_write(resp, op->status, &op->u.write);
2412 break;
2413 case OP_RELEASE_LOCKOWNER:
2414 break;
2415 default:
2416 break;
2417 }
2418
2419 /*
2420 * Note: We write the status directly, instead of using WRITE32(),
2421 * since it is already in network byte order.
2422 */
2423 *statp = op->status;
2424 }
2425
2426 /*
2427 * Encode the reply stored in the stateowner reply cache
2428 *
2429 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2430 * previously sent already encoded operation.
2431 *
2432 * called with nfs4_lock_state() held
2433 */
2434 void
2435 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2436 {
2437 ENCODE_HEAD;
2438 struct nfs4_replay *rp = op->replay;
2439
2440 BUG_ON(!rp);
2441
2442 RESERVE_SPACE(8);
2443 WRITE32(op->opnum);
2444 *p++ = rp->rp_status; /* already xdr'ed */
2445 ADJUST_ARGS();
2446
2447 RESERVE_SPACE(rp->rp_buflen);
2448 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2449 ADJUST_ARGS();
2450 }
2451
2452 /*
2453 * END OF "GENERIC" ENCODE ROUTINES.
2454 */
2455
2456 int
2457 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2458 {
2459 return xdr_ressize_check(rqstp, p);
2460 }
2461
2462 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2463 {
2464 if (args->ops != args->iops) {
2465 kfree(args->ops);
2466 args->ops = args->iops;
2467 }
2468 kfree(args->tmpp);
2469 args->tmpp = NULL;
2470 while (args->to_free) {
2471 struct tmpbuf *tb = args->to_free;
2472 args->to_free = tb->next;
2473 tb->release(tb->buf);
2474 kfree(tb);
2475 }
2476 }
2477
2478 int
2479 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2480 {
2481 int status;
2482
2483 args->p = p;
2484 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2485 args->pagelist = rqstp->rq_arg.pages;
2486 args->pagelen = rqstp->rq_arg.page_len;
2487 args->tmpp = NULL;
2488 args->to_free = NULL;
2489 args->ops = args->iops;
2490 args->rqstp = rqstp;
2491
2492 status = nfsd4_decode_compound(args);
2493 if (status) {
2494 nfsd4_release_compoundargs(args);
2495 }
2496 return !status;
2497 }
2498
2499 int
2500 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2501 {
2502 /*
2503 * All that remains is to write the tag and operation count...
2504 */
2505 struct kvec *iov;
2506 p = resp->tagp;
2507 *p++ = htonl(resp->taglen);
2508 memcpy(p, resp->tag, resp->taglen);
2509 p += XDR_QUADLEN(resp->taglen);
2510 *p++ = htonl(resp->opcnt);
2511
2512 if (rqstp->rq_res.page_len)
2513 iov = &rqstp->rq_res.tail[0];
2514 else
2515 iov = &rqstp->rq_res.head[0];
2516 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2517 BUG_ON(iov->iov_len > PAGE_SIZE);
2518 return 1;
2519 }
2520
2521 /*
2522 * Local variables:
2523 * c-basic-offset: 8
2524 * End:
2525 */
kernel source for telekom puls (alcatel/mediatek)