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[hh.org.git] / fs / nfsd / nfs4xdr.c
blobf3f239db04bb1b0d54f1a18ff78f4ffce3d18ee1
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 /*
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
67 */
68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
71 static __be32
72 check_filename(char *str, int len, __be32 err)
73 {
74 int i;
75
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
84 }
85
86 /*
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
91 *
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
95 */
96 #define DECODE_HEAD \
97 __be32 *p; \
98 __be32 status
99 #define DECODE_TAIL \
100 status = 0; \
101 out: \
102 return status; \
103 xdr_error: \
104 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
105 status = nfserr_bad_xdr; \
106 goto out
107
108 #define READ32(x) (x) = ntohl(*p++)
109 #define READ64(x) do { \
110 (x) = (u64)ntohl(*p++) << 32; \
111 (x) |= ntohl(*p++); \
112 } while (0)
113 #define READTIME(x) do { \
114 p++; \
115 (x) = ntohl(*p++); \
116 p++; \
117 } while (0)
118 #define READMEM(x,nbytes) do { \
119 x = (char *)p; \
120 p += XDR_QUADLEN(nbytes); \
121 } while (0)
122 #define SAVEMEM(x,nbytes) do { \
123 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
124 savemem(argp, p, nbytes) : \
125 (char *)p)) { \
126 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
127 goto xdr_error; \
128 } \
129 p += XDR_QUADLEN(nbytes); \
130 } while (0)
131 #define COPYMEM(x,nbytes) do { \
132 memcpy((x), p, nbytes); \
133 p += XDR_QUADLEN(nbytes); \
134 } while (0)
135
136 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
137 #define READ_BUF(nbytes) do { \
138 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
139 p = argp->p; \
140 argp->p += XDR_QUADLEN(nbytes); \
141 } else if (!(p = read_buf(argp, nbytes))) { \
142 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
143 goto xdr_error; \
144 } \
145 } while (0)
146
147 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
148 {
149 /* We want more bytes than seem to be available.
150 * Maybe we need a new page, maybe we have just run out
151 */
152 int avail = (char*)argp->end - (char*)argp->p;
153 __be32 *p;
154 if (avail + argp->pagelen < nbytes)
155 return NULL;
156 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
157 return NULL;
158 /* ok, we can do it with the current plus the next page */
159 if (nbytes <= sizeof(argp->tmp))
160 p = argp->tmp;
161 else {
162 kfree(argp->tmpp);
163 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
164 if (!p)
165 return NULL;
166
167 }
168 memcpy(p, argp->p, avail);
169 /* step to next page */
170 argp->p = page_address(argp->pagelist[0]);
171 argp->pagelist++;
172 if (argp->pagelen < PAGE_SIZE) {
173 argp->end = p + (argp->pagelen>>2);
174 argp->pagelen = 0;
175 } else {
176 argp->end = p + (PAGE_SIZE>>2);
177 argp->pagelen -= PAGE_SIZE;
178 }
179 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
180 argp->p += XDR_QUADLEN(nbytes - avail);
181 return p;
182 }
183
184 static int
185 defer_free(struct nfsd4_compoundargs *argp,
186 void (*release)(const void *), void *p)
187 {
188 struct tmpbuf *tb;
189
190 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
191 if (!tb)
192 return -ENOMEM;
193 tb->buf = p;
194 tb->release = release;
195 tb->next = argp->to_free;
196 argp->to_free = tb;
197 return 0;
198 }
199
200 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
201 {
202 void *new = NULL;
203 if (p == argp->tmp) {
204 new = kmalloc(nbytes, GFP_KERNEL);
205 if (!new) return NULL;
206 p = new;
207 memcpy(p, argp->tmp, nbytes);
208 } else {
209 BUG_ON(p != argp->tmpp);
210 argp->tmpp = NULL;
211 }
212 if (defer_free(argp, kfree, p)) {
213 kfree(new);
214 return NULL;
215 } else
216 return (char *)p;
217 }
218
219
220 static __be32
221 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
222 {
223 u32 bmlen;
224 DECODE_HEAD;
225
226 bmval[0] = 0;
227 bmval[1] = 0;
228
229 READ_BUF(4);
230 READ32(bmlen);
231 if (bmlen > 1000)
232 goto xdr_error;
233
234 READ_BUF(bmlen << 2);
235 if (bmlen > 0)
236 READ32(bmval[0]);
237 if (bmlen > 1)
238 READ32(bmval[1]);
239
240 DECODE_TAIL;
241 }
242
243 static __be32
244 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
245 struct nfs4_acl **acl)
246 {
247 int expected_len, len = 0;
248 u32 dummy32;
249 char *buf;
250 int host_err;
251
252 DECODE_HEAD;
253 iattr->ia_valid = 0;
254 if ((status = nfsd4_decode_bitmap(argp, bmval)))
255 return status;
256
257 /*
258 * According to spec, unsupported attributes return ERR_NOTSUPP;
259 * read-only attributes return ERR_INVAL.
260 */
261 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
262 return nfserr_attrnotsupp;
263 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
264 return nfserr_inval;
265
266 READ_BUF(4);
267 READ32(expected_len);
268
269 if (bmval[0] & FATTR4_WORD0_SIZE) {
270 READ_BUF(8);
271 len += 8;
272 READ64(iattr->ia_size);
273 iattr->ia_valid |= ATTR_SIZE;
274 }
275 if (bmval[0] & FATTR4_WORD0_ACL) {
276 int nace, i;
277 struct nfs4_ace ace;
278
279 READ_BUF(4); len += 4;
280 READ32(nace);
281
282 *acl = nfs4_acl_new();
283 if (*acl == NULL) {
284 host_err = -ENOMEM;
285 goto out_nfserr;
286 }
287 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
288
289 for (i = 0; i < nace; i++) {
290 READ_BUF(16); len += 16;
291 READ32(ace.type);
292 READ32(ace.flag);
293 READ32(ace.access_mask);
294 READ32(dummy32);
295 READ_BUF(dummy32);
296 len += XDR_QUADLEN(dummy32) << 2;
297 READMEM(buf, dummy32);
298 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
299 host_err = 0;
300 if (ace.whotype != NFS4_ACL_WHO_NAMED)
301 ace.who = 0;
302 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
303 host_err = nfsd_map_name_to_gid(argp->rqstp,
304 buf, dummy32, &ace.who);
305 else
306 host_err = nfsd_map_name_to_uid(argp->rqstp,
307 buf, dummy32, &ace.who);
308 if (host_err)
309 goto out_nfserr;
310 host_err = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
311 ace.access_mask, ace.whotype, ace.who);
312 if (host_err)
313 goto out_nfserr;
314 }
315 } else
316 *acl = NULL;
317 if (bmval[1] & FATTR4_WORD1_MODE) {
318 READ_BUF(4);
319 len += 4;
320 READ32(iattr->ia_mode);
321 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
322 iattr->ia_valid |= ATTR_MODE;
323 }
324 if (bmval[1] & FATTR4_WORD1_OWNER) {
325 READ_BUF(4);
326 len += 4;
327 READ32(dummy32);
328 READ_BUF(dummy32);
329 len += (XDR_QUADLEN(dummy32) << 2);
330 READMEM(buf, dummy32);
331 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
332 goto out_nfserr;
333 iattr->ia_valid |= ATTR_UID;
334 }
335 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
336 READ_BUF(4);
337 len += 4;
338 READ32(dummy32);
339 READ_BUF(dummy32);
340 len += (XDR_QUADLEN(dummy32) << 2);
341 READMEM(buf, dummy32);
342 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
343 goto out_nfserr;
344 iattr->ia_valid |= ATTR_GID;
345 }
346 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
347 READ_BUF(4);
348 len += 4;
349 READ32(dummy32);
350 switch (dummy32) {
351 case NFS4_SET_TO_CLIENT_TIME:
352 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
353 all 32 bits of 'nseconds'. */
354 READ_BUF(12);
355 len += 12;
356 READ32(dummy32);
357 if (dummy32)
358 return nfserr_inval;
359 READ32(iattr->ia_atime.tv_sec);
360 READ32(iattr->ia_atime.tv_nsec);
361 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
362 return nfserr_inval;
363 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
364 break;
365 case NFS4_SET_TO_SERVER_TIME:
366 iattr->ia_valid |= ATTR_ATIME;
367 break;
368 default:
369 goto xdr_error;
370 }
371 }
372 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
373 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
374 all 32 bits of 'nseconds'. */
375 READ_BUF(12);
376 len += 12;
377 READ32(dummy32);
378 if (dummy32)
379 return nfserr_inval;
380 READ32(iattr->ia_ctime.tv_sec);
381 READ32(iattr->ia_ctime.tv_nsec);
382 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
383 return nfserr_inval;
384 iattr->ia_valid |= ATTR_CTIME;
385 }
386 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
387 READ_BUF(4);
388 len += 4;
389 READ32(dummy32);
390 switch (dummy32) {
391 case NFS4_SET_TO_CLIENT_TIME:
392 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
393 all 32 bits of 'nseconds'. */
394 READ_BUF(12);
395 len += 12;
396 READ32(dummy32);
397 if (dummy32)
398 return nfserr_inval;
399 READ32(iattr->ia_mtime.tv_sec);
400 READ32(iattr->ia_mtime.tv_nsec);
401 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
402 return nfserr_inval;
403 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
404 break;
405 case NFS4_SET_TO_SERVER_TIME:
406 iattr->ia_valid |= ATTR_MTIME;
407 break;
408 default:
409 goto xdr_error;
410 }
411 }
412 if (len != expected_len)
413 goto xdr_error;
414
415 DECODE_TAIL;
416
417 out_nfserr:
418 status = nfserrno(host_err);
419 goto out;
420 }
421
422 static __be32
423 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
424 {
425 DECODE_HEAD;
426
427 READ_BUF(4);
428 READ32(access->ac_req_access);
429
430 DECODE_TAIL;
431 }
432
433 static __be32
434 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
435 {
436 DECODE_HEAD;
437
438 close->cl_stateowner = NULL;
439 READ_BUF(4 + sizeof(stateid_t));
440 READ32(close->cl_seqid);
441 READ32(close->cl_stateid.si_generation);
442 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
443
444 DECODE_TAIL;
445 }
446
447
448 static __be32
449 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
450 {
451 DECODE_HEAD;
452
453 READ_BUF(12);
454 READ64(commit->co_offset);
455 READ32(commit->co_count);
456
457 DECODE_TAIL;
458 }
459
460 static __be32
461 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
462 {
463 DECODE_HEAD;
464
465 READ_BUF(4);
466 READ32(create->cr_type);
467 switch (create->cr_type) {
468 case NF4LNK:
469 READ_BUF(4);
470 READ32(create->cr_linklen);
471 READ_BUF(create->cr_linklen);
472 SAVEMEM(create->cr_linkname, create->cr_linklen);
473 break;
474 case NF4BLK:
475 case NF4CHR:
476 READ_BUF(8);
477 READ32(create->cr_specdata1);
478 READ32(create->cr_specdata2);
479 break;
480 case NF4SOCK:
481 case NF4FIFO:
482 case NF4DIR:
483 default:
484 break;
485 }
486
487 READ_BUF(4);
488 READ32(create->cr_namelen);
489 READ_BUF(create->cr_namelen);
490 SAVEMEM(create->cr_name, create->cr_namelen);
491 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
492 return status;
493
494 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
495 goto out;
496
497 DECODE_TAIL;
498 }
499
500 static inline __be32
501 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
502 {
503 DECODE_HEAD;
504
505 READ_BUF(sizeof(stateid_t));
506 READ32(dr->dr_stateid.si_generation);
507 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
508
509 DECODE_TAIL;
510 }
511
512 static inline __be32
513 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
514 {
515 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
516 }
517
518 static __be32
519 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
520 {
521 DECODE_HEAD;
522
523 READ_BUF(4);
524 READ32(link->li_namelen);
525 READ_BUF(link->li_namelen);
526 SAVEMEM(link->li_name, link->li_namelen);
527 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
528 return status;
529
530 DECODE_TAIL;
531 }
532
533 static __be32
534 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
535 {
536 DECODE_HEAD;
537
538 lock->lk_replay_owner = NULL;
539 /*
540 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
541 */
542 READ_BUF(28);
543 READ32(lock->lk_type);
544 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
545 goto xdr_error;
546 READ32(lock->lk_reclaim);
547 READ64(lock->lk_offset);
548 READ64(lock->lk_length);
549 READ32(lock->lk_is_new);
550
551 if (lock->lk_is_new) {
552 READ_BUF(36);
553 READ32(lock->lk_new_open_seqid);
554 READ32(lock->lk_new_open_stateid.si_generation);
555
556 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
557 READ32(lock->lk_new_lock_seqid);
558 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
559 READ32(lock->lk_new_owner.len);
560 READ_BUF(lock->lk_new_owner.len);
561 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
562 } else {
563 READ_BUF(20);
564 READ32(lock->lk_old_lock_stateid.si_generation);
565 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
566 READ32(lock->lk_old_lock_seqid);
567 }
568
569 DECODE_TAIL;
570 }
571
572 static __be32
573 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
574 {
575 DECODE_HEAD;
576
577 READ_BUF(32);
578 READ32(lockt->lt_type);
579 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
580 goto xdr_error;
581 READ64(lockt->lt_offset);
582 READ64(lockt->lt_length);
583 COPYMEM(&lockt->lt_clientid, 8);
584 READ32(lockt->lt_owner.len);
585 READ_BUF(lockt->lt_owner.len);
586 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
587
588 DECODE_TAIL;
589 }
590
591 static __be32
592 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
593 {
594 DECODE_HEAD;
595
596 locku->lu_stateowner = NULL;
597 READ_BUF(24 + sizeof(stateid_t));
598 READ32(locku->lu_type);
599 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
600 goto xdr_error;
601 READ32(locku->lu_seqid);
602 READ32(locku->lu_stateid.si_generation);
603 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
604 READ64(locku->lu_offset);
605 READ64(locku->lu_length);
606
607 DECODE_TAIL;
608 }
609
610 static __be32
611 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
612 {
613 DECODE_HEAD;
614
615 READ_BUF(4);
616 READ32(lookup->lo_len);
617 READ_BUF(lookup->lo_len);
618 SAVEMEM(lookup->lo_name, lookup->lo_len);
619 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
620 return status;
621
622 DECODE_TAIL;
623 }
624
625 static __be32
626 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
627 {
628 DECODE_HEAD;
629
630 memset(open->op_bmval, 0, sizeof(open->op_bmval));
631 open->op_iattr.ia_valid = 0;
632 open->op_stateowner = NULL;
633
634 /* seqid, share_access, share_deny, clientid, ownerlen */
635 READ_BUF(16 + sizeof(clientid_t));
636 READ32(open->op_seqid);
637 READ32(open->op_share_access);
638 READ32(open->op_share_deny);
639 COPYMEM(&open->op_clientid, sizeof(clientid_t));
640 READ32(open->op_owner.len);
641
642 /* owner, open_flag */
643 READ_BUF(open->op_owner.len + 4);
644 SAVEMEM(open->op_owner.data, open->op_owner.len);
645 READ32(open->op_create);
646 switch (open->op_create) {
647 case NFS4_OPEN_NOCREATE:
648 break;
649 case NFS4_OPEN_CREATE:
650 READ_BUF(4);
651 READ32(open->op_createmode);
652 switch (open->op_createmode) {
653 case NFS4_CREATE_UNCHECKED:
654 case NFS4_CREATE_GUARDED:
655 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
656 goto out;
657 break;
658 case NFS4_CREATE_EXCLUSIVE:
659 READ_BUF(8);
660 COPYMEM(open->op_verf.data, 8);
661 break;
662 default:
663 goto xdr_error;
664 }
665 break;
666 default:
667 goto xdr_error;
668 }
669
670 /* open_claim */
671 READ_BUF(4);
672 READ32(open->op_claim_type);
673 switch (open->op_claim_type) {
674 case NFS4_OPEN_CLAIM_NULL:
675 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
676 READ_BUF(4);
677 READ32(open->op_fname.len);
678 READ_BUF(open->op_fname.len);
679 SAVEMEM(open->op_fname.data, open->op_fname.len);
680 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
681 return status;
682 break;
683 case NFS4_OPEN_CLAIM_PREVIOUS:
684 READ_BUF(4);
685 READ32(open->op_delegate_type);
686 break;
687 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
688 READ_BUF(sizeof(stateid_t) + 4);
689 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
690 READ32(open->op_fname.len);
691 READ_BUF(open->op_fname.len);
692 SAVEMEM(open->op_fname.data, open->op_fname.len);
693 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
694 return status;
695 break;
696 default:
697 goto xdr_error;
698 }
699
700 DECODE_TAIL;
701 }
702
703 static __be32
704 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
705 {
706 DECODE_HEAD;
707
708 open_conf->oc_stateowner = NULL;
709 READ_BUF(4 + sizeof(stateid_t));
710 READ32(open_conf->oc_req_stateid.si_generation);
711 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
712 READ32(open_conf->oc_seqid);
713
714 DECODE_TAIL;
715 }
716
717 static __be32
718 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
719 {
720 DECODE_HEAD;
721
722 open_down->od_stateowner = NULL;
723 READ_BUF(12 + sizeof(stateid_t));
724 READ32(open_down->od_stateid.si_generation);
725 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
726 READ32(open_down->od_seqid);
727 READ32(open_down->od_share_access);
728 READ32(open_down->od_share_deny);
729
730 DECODE_TAIL;
731 }
732
733 static __be32
734 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
735 {
736 DECODE_HEAD;
737
738 READ_BUF(4);
739 READ32(putfh->pf_fhlen);
740 if (putfh->pf_fhlen > NFS4_FHSIZE)
741 goto xdr_error;
742 READ_BUF(putfh->pf_fhlen);
743 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
744
745 DECODE_TAIL;
746 }
747
748 static __be32
749 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
750 {
751 DECODE_HEAD;
752
753 READ_BUF(sizeof(stateid_t) + 12);
754 READ32(read->rd_stateid.si_generation);
755 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
756 READ64(read->rd_offset);
757 READ32(read->rd_length);
758
759 DECODE_TAIL;
760 }
761
762 static __be32
763 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
764 {
765 DECODE_HEAD;
766
767 READ_BUF(24);
768 READ64(readdir->rd_cookie);
769 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
770 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
771 READ32(readdir->rd_maxcount);
772 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
773 goto out;
774
775 DECODE_TAIL;
776 }
777
778 static __be32
779 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
780 {
781 DECODE_HEAD;
782
783 READ_BUF(4);
784 READ32(remove->rm_namelen);
785 READ_BUF(remove->rm_namelen);
786 SAVEMEM(remove->rm_name, remove->rm_namelen);
787 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
788 return status;
789
790 DECODE_TAIL;
791 }
792
793 static __be32
794 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
795 {
796 DECODE_HEAD;
797
798 READ_BUF(4);
799 READ32(rename->rn_snamelen);
800 READ_BUF(rename->rn_snamelen + 4);
801 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
802 READ32(rename->rn_tnamelen);
803 READ_BUF(rename->rn_tnamelen);
804 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
805 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
806 return status;
807 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
808 return status;
809
810 DECODE_TAIL;
811 }
812
813 static __be32
814 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
815 {
816 DECODE_HEAD;
817
818 READ_BUF(sizeof(clientid_t));
819 COPYMEM(clientid, sizeof(clientid_t));
820
821 DECODE_TAIL;
822 }
823
824 static __be32
825 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
826 {
827 DECODE_HEAD;
828
829 READ_BUF(sizeof(stateid_t));
830 READ32(setattr->sa_stateid.si_generation);
831 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
832 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
833 goto out;
834
835 DECODE_TAIL;
836 }
837
838 static __be32
839 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
840 {
841 DECODE_HEAD;
842
843 READ_BUF(12);
844 COPYMEM(setclientid->se_verf.data, 8);
845 READ32(setclientid->se_namelen);
846
847 READ_BUF(setclientid->se_namelen + 8);
848 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
849 READ32(setclientid->se_callback_prog);
850 READ32(setclientid->se_callback_netid_len);
851
852 READ_BUF(setclientid->se_callback_netid_len + 4);
853 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
854 READ32(setclientid->se_callback_addr_len);
855
856 READ_BUF(setclientid->se_callback_addr_len + 4);
857 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
858 READ32(setclientid->se_callback_ident);
859
860 DECODE_TAIL;
861 }
862
863 static __be32
864 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
865 {
866 DECODE_HEAD;
867
868 READ_BUF(8 + sizeof(nfs4_verifier));
869 COPYMEM(&scd_c->sc_clientid, 8);
870 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
871
872 DECODE_TAIL;
873 }
874
875 /* Also used for NVERIFY */
876 static __be32
877 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
878 {
879 #if 0
880 struct nfsd4_compoundargs save = {
881 .p = argp->p,
882 .end = argp->end,
883 .rqstp = argp->rqstp,
884 };
885 u32 ve_bmval[2];
886 struct iattr ve_iattr; /* request */
887 struct nfs4_acl *ve_acl; /* request */
888 #endif
889 DECODE_HEAD;
890
891 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
892 goto out;
893
894 /* For convenience's sake, we compare raw xdr'd attributes in
895 * nfsd4_proc_verify; however we still decode here just to return
896 * correct error in case of bad xdr. */
897 #if 0
898 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
899 if (status == nfserr_inval) {
900 status = nfserrno(status);
901 goto out;
902 }
903 #endif
904 READ_BUF(4);
905 READ32(verify->ve_attrlen);
906 READ_BUF(verify->ve_attrlen);
907 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
908
909 DECODE_TAIL;
910 }
911
912 static __be32
913 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
914 {
915 int avail;
916 int v;
917 int len;
918 DECODE_HEAD;
919
920 READ_BUF(sizeof(stateid_opaque_t) + 20);
921 READ32(write->wr_stateid.si_generation);
922 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
923 READ64(write->wr_offset);
924 READ32(write->wr_stable_how);
925 if (write->wr_stable_how > 2)
926 goto xdr_error;
927 READ32(write->wr_buflen);
928
929 /* Sorry .. no magic macros for this.. *
930 * READ_BUF(write->wr_buflen);
931 * SAVEMEM(write->wr_buf, write->wr_buflen);
932 */
933 avail = (char*)argp->end - (char*)argp->p;
934 if (avail + argp->pagelen < write->wr_buflen) {
935 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
936 goto xdr_error;
937 }
938 argp->rqstp->rq_vec[0].iov_base = p;
939 argp->rqstp->rq_vec[0].iov_len = avail;
940 v = 0;
941 len = write->wr_buflen;
942 while (len > argp->rqstp->rq_vec[v].iov_len) {
943 len -= argp->rqstp->rq_vec[v].iov_len;
944 v++;
945 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
946 argp->pagelist++;
947 if (argp->pagelen >= PAGE_SIZE) {
948 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
949 argp->pagelen -= PAGE_SIZE;
950 } else {
951 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
952 argp->pagelen -= len;
953 }
954 }
955 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
956 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
957 argp->rqstp->rq_vec[v].iov_len = len;
958 write->wr_vlen = v+1;
959
960 DECODE_TAIL;
961 }
962
963 static __be32
964 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
965 {
966 DECODE_HEAD;
967
968 READ_BUF(12);
969 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
970 READ32(rlockowner->rl_owner.len);
971 READ_BUF(rlockowner->rl_owner.len);
972 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
973
974 DECODE_TAIL;
975 }
976
977 static __be32
978 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
979 {
980 DECODE_HEAD;
981 struct nfsd4_op *op;
982 int i;
983
984 /*
985 * XXX: According to spec, we should check the tag
986 * for UTF-8 compliance. I'm postponing this for
987 * now because it seems that some clients do use
988 * binary tags.
989 */
990 READ_BUF(4);
991 READ32(argp->taglen);
992 READ_BUF(argp->taglen + 8);
993 SAVEMEM(argp->tag, argp->taglen);
994 READ32(argp->minorversion);
995 READ32(argp->opcnt);
996
997 if (argp->taglen > NFSD4_MAX_TAGLEN)
998 goto xdr_error;
999 if (argp->opcnt > 100)
1000 goto xdr_error;
1001
1002 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1003 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1004 if (!argp->ops) {
1005 argp->ops = argp->iops;
1006 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1007 goto xdr_error;
1008 }
1009 }
1010
1011 for (i = 0; i < argp->opcnt; i++) {
1012 op = &argp->ops[i];
1013 op->replay = NULL;
1014
1015 /*
1016 * We can't use READ_BUF() here because we need to handle
1017 * a missing opcode as an OP_WRITE + 1. So we need to check
1018 * to see if we're truly at the end of our buffer or if there
1019 * is another page we need to flip to.
1020 */
1021
1022 if (argp->p == argp->end) {
1023 if (argp->pagelen < 4) {
1024 /* There isn't an opcode still on the wire */
1025 op->opnum = OP_WRITE + 1;
1026 op->status = nfserr_bad_xdr;
1027 argp->opcnt = i+1;
1028 break;
1029 }
1030
1031 /*
1032 * False alarm. We just hit a page boundary, but there
1033 * is still data available. Move pointer across page
1034 * boundary. *snip from READ_BUF*
1035 */
1036 argp->p = page_address(argp->pagelist[0]);
1037 argp->pagelist++;
1038 if (argp->pagelen < PAGE_SIZE) {
1039 argp->end = p + (argp->pagelen>>2);
1040 argp->pagelen = 0;
1041 } else {
1042 argp->end = p + (PAGE_SIZE>>2);
1043 argp->pagelen -= PAGE_SIZE;
1044 }
1045 }
1046 op->opnum = ntohl(*argp->p++);
1047
1048 switch (op->opnum) {
1049 case 2: /* Reserved operation */
1050 op->opnum = OP_ILLEGAL;
1051 if (argp->minorversion == 0)
1052 op->status = nfserr_op_illegal;
1053 else
1054 op->status = nfserr_minor_vers_mismatch;
1055 break;
1056 case OP_ACCESS:
1057 op->status = nfsd4_decode_access(argp, &op->u.access);
1058 break;
1059 case OP_CLOSE:
1060 op->status = nfsd4_decode_close(argp, &op->u.close);
1061 break;
1062 case OP_COMMIT:
1063 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1064 break;
1065 case OP_CREATE:
1066 op->status = nfsd4_decode_create(argp, &op->u.create);
1067 break;
1068 case OP_DELEGRETURN:
1069 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1070 break;
1071 case OP_GETATTR:
1072 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1073 break;
1074 case OP_GETFH:
1075 op->status = nfs_ok;
1076 break;
1077 case OP_LINK:
1078 op->status = nfsd4_decode_link(argp, &op->u.link);
1079 break;
1080 case OP_LOCK:
1081 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1082 break;
1083 case OP_LOCKT:
1084 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1085 break;
1086 case OP_LOCKU:
1087 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1088 break;
1089 case OP_LOOKUP:
1090 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1091 break;
1092 case OP_LOOKUPP:
1093 op->status = nfs_ok;
1094 break;
1095 case OP_NVERIFY:
1096 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1097 break;
1098 case OP_OPEN:
1099 op->status = nfsd4_decode_open(argp, &op->u.open);
1100 break;
1101 case OP_OPEN_CONFIRM:
1102 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1103 break;
1104 case OP_OPEN_DOWNGRADE:
1105 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1106 break;
1107 case OP_PUTFH:
1108 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1109 break;
1110 case OP_PUTROOTFH:
1111 op->status = nfs_ok;
1112 break;
1113 case OP_READ:
1114 op->status = nfsd4_decode_read(argp, &op->u.read);
1115 break;
1116 case OP_READDIR:
1117 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1118 break;
1119 case OP_READLINK:
1120 op->status = nfs_ok;
1121 break;
1122 case OP_REMOVE:
1123 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1124 break;
1125 case OP_RENAME:
1126 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1127 break;
1128 case OP_RESTOREFH:
1129 op->status = nfs_ok;
1130 break;
1131 case OP_RENEW:
1132 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1133 break;
1134 case OP_SAVEFH:
1135 op->status = nfs_ok;
1136 break;
1137 case OP_SETATTR:
1138 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1139 break;
1140 case OP_SETCLIENTID:
1141 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1142 break;
1143 case OP_SETCLIENTID_CONFIRM:
1144 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1145 break;
1146 case OP_VERIFY:
1147 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1148 break;
1149 case OP_WRITE:
1150 op->status = nfsd4_decode_write(argp, &op->u.write);
1151 break;
1152 case OP_RELEASE_LOCKOWNER:
1153 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1154 break;
1155 default:
1156 op->opnum = OP_ILLEGAL;
1157 op->status = nfserr_op_illegal;
1158 break;
1159 }
1160
1161 if (op->status) {
1162 argp->opcnt = i+1;
1163 break;
1164 }
1165 }
1166
1167 DECODE_TAIL;
1168 }
1169 /*
1170 * END OF "GENERIC" DECODE ROUTINES.
1171 */
1172
1173 /*
1174 * START OF "GENERIC" ENCODE ROUTINES.
1175 * These may look a little ugly since they are imported from a "generic"
1176 * set of XDR encode/decode routines which are intended to be shared by
1177 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1178 *
1179 * If the pain of reading these is too great, it should be a straightforward
1180 * task to translate them into Linux-specific versions which are more
1181 * consistent with the style used in NFSv2/v3...
1182 */
1183 #define ENCODE_HEAD __be32 *p
1184
1185 #define WRITE32(n) *p++ = htonl(n)
1186 #define WRITE64(n) do { \
1187 *p++ = htonl((u32)((n) >> 32)); \
1188 *p++ = htonl((u32)(n)); \
1189 } while (0)
1190 #define WRITEMEM(ptr,nbytes) do { \
1191 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1192 memcpy(p, ptr, nbytes); \
1193 p += XDR_QUADLEN(nbytes); \
1194 } while (0)
1195 #define WRITECINFO(c) do { \
1196 *p++ = htonl(c.atomic); \
1197 *p++ = htonl(c.before_ctime_sec); \
1198 *p++ = htonl(c.before_ctime_nsec); \
1199 *p++ = htonl(c.after_ctime_sec); \
1200 *p++ = htonl(c.after_ctime_nsec); \
1201 } while (0)
1202
1203 #define RESERVE_SPACE(nbytes) do { \
1204 p = resp->p; \
1205 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1206 } while (0)
1207 #define ADJUST_ARGS() resp->p = p
1208
1209 /*
1210 * Header routine to setup seqid operation replay cache
1211 */
1212 #define ENCODE_SEQID_OP_HEAD \
1213 __be32 *p; \
1214 __be32 *save; \
1215 \
1216 save = resp->p;
1217
1218 /*
1219 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1220 * is where sequence id's are incremented, and the replay cache is filled.
1221 * Note that we increment sequence id's here, at the last moment, so we're sure
1222 * we know whether the error to be returned is a sequence id mutating error.
1223 */
1224
1225 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1226 if (seqid_mutating_err(nfserr) && stateowner) { \
1227 stateowner->so_seqid++; \
1228 stateowner->so_replay.rp_status = nfserr; \
1229 stateowner->so_replay.rp_buflen = \
1230 (((char *)(resp)->p - (char *)save)); \
1231 memcpy(stateowner->so_replay.rp_buf, save, \
1232 stateowner->so_replay.rp_buflen); \
1233 } } while (0);
1234
1235 /* Encode as an array of strings the string given with components
1236 * seperated @sep.
1237 */
1238 static __be32 nfsd4_encode_components(char sep, char *components,
1239 __be32 **pp, int *buflen)
1240 {
1241 __be32 *p = *pp;
1242 __be32 *countp = p;
1243 int strlen, count=0;
1244 char *str, *end;
1245
1246 dprintk("nfsd4_encode_components(%s)\n", components);
1247 if ((*buflen -= 4) < 0)
1248 return nfserr_resource;
1249 WRITE32(0); /* We will fill this in with @count later */
1250 end = str = components;
1251 while (*end) {
1252 for (; *end && (*end != sep); end++)
1253 ; /* Point to end of component */
1254 strlen = end - str;
1255 if (strlen) {
1256 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1257 return nfserr_resource;
1258 WRITE32(strlen);
1259 WRITEMEM(str, strlen);
1260 count++;
1261 }
1262 else
1263 end++;
1264 str = end;
1265 }
1266 *pp = p;
1267 p = countp;
1268 WRITE32(count);
1269 return 0;
1270 }
1271
1272 /*
1273 * encode a location element of a fs_locations structure
1274 */
1275 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1276 __be32 **pp, int *buflen)
1277 {
1278 __be32 status;
1279 __be32 *p = *pp;
1280
1281 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1282 if (status)
1283 return status;
1284 status = nfsd4_encode_components('/', location->path, &p, buflen);
1285 if (status)
1286 return status;
1287 *pp = p;
1288 return 0;
1289 }
1290
1291 /*
1292 * Return the path to an export point in the pseudo filesystem namespace
1293 * Returned string is safe to use as long as the caller holds a reference
1294 * to @exp.
1295 */
1296 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1297 {
1298 struct svc_fh tmp_fh;
1299 char *path, *rootpath;
1300
1301 fh_init(&tmp_fh, NFS4_FHSIZE);
1302 *stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
1303 if (*stat)
1304 return NULL;
1305 rootpath = tmp_fh.fh_export->ex_path;
1306
1307 path = exp->ex_path;
1308
1309 if (strncmp(path, rootpath, strlen(rootpath))) {
1310 printk("nfsd: fs_locations failed;"
1311 "%s is not contained in %s\n", path, rootpath);
1312 *stat = nfserr_notsupp;
1313 return NULL;
1314 }
1315
1316 return path + strlen(rootpath);
1317 }
1318
1319 /*
1320 * encode a fs_locations structure
1321 */
1322 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1323 struct svc_export *exp,
1324 __be32 **pp, int *buflen)
1325 {
1326 __be32 status;
1327 int i;
1328 __be32 *p = *pp;
1329 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1330 char *root = nfsd4_path(rqstp, exp, &status);
1331
1332 if (status)
1333 return status;
1334 status = nfsd4_encode_components('/', root, &p, buflen);
1335 if (status)
1336 return status;
1337 if ((*buflen -= 4) < 0)
1338 return nfserr_resource;
1339 WRITE32(fslocs->locations_count);
1340 for (i=0; i<fslocs->locations_count; i++) {
1341 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1342 &p, buflen);
1343 if (status)
1344 return status;
1345 }
1346 *pp = p;
1347 return 0;
1348 }
1349
1350 static u32 nfs4_ftypes[16] = {
1351 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1352 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1353 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1354 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1355 };
1356
1357 static __be32
1358 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1359 __be32 **p, int *buflen)
1360 {
1361 int status;
1362
1363 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1364 return nfserr_resource;
1365 if (whotype != NFS4_ACL_WHO_NAMED)
1366 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1367 else if (group)
1368 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1369 else
1370 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1371 if (status < 0)
1372 return nfserrno(status);
1373 *p = xdr_encode_opaque(*p, NULL, status);
1374 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1375 BUG_ON(*buflen < 0);
1376 return 0;
1377 }
1378
1379 static inline __be32
1380 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1381 {
1382 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1383 }
1384
1385 static inline __be32
1386 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1387 {
1388 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1389 }
1390
1391 static inline __be32
1392 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1393 __be32 **p, int *buflen)
1394 {
1395 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1396 }
1397
1398 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1399 FATTR4_WORD0_RDATTR_ERROR)
1400 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1401
1402 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1403 {
1404 /* As per referral draft: */
1405 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1406 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1407 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1408 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1409 *rdattr_err = NFSERR_MOVED;
1410 else
1411 return nfserr_moved;
1412 }
1413 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1414 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1415 return 0;
1416 }
1417
1418 /*
1419 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1420 * ourselves.
1421 *
1422 * @countp is the buffer size in _words_; upon successful return this becomes
1423 * replaced with the number of words written.
1424 */
1425 __be32
1426 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1427 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1428 struct svc_rqst *rqstp)
1429 {
1430 u32 bmval0 = bmval[0];
1431 u32 bmval1 = bmval[1];
1432 struct kstat stat;
1433 struct svc_fh tempfh;
1434 struct kstatfs statfs;
1435 int buflen = *countp << 2;
1436 __be32 *attrlenp;
1437 u32 dummy;
1438 u64 dummy64;
1439 u32 rdattr_err = 0;
1440 __be32 *p = buffer;
1441 __be32 status;
1442 int err;
1443 int aclsupport = 0;
1444 struct nfs4_acl *acl = NULL;
1445
1446 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1447 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1448 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1449
1450 if (exp->ex_fslocs.migrated) {
1451 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1452 if (status)
1453 goto out;
1454 }
1455
1456 err = vfs_getattr(exp->ex_mnt, dentry, &stat);
1457 if (err)
1458 goto out_nfserr;
1459 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1460 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1461 FATTR4_WORD1_SPACE_TOTAL))) {
1462 err = vfs_statfs(dentry, &statfs);
1463 if (err)
1464 goto out_nfserr;
1465 }
1466 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1467 fh_init(&tempfh, NFS4_FHSIZE);
1468 status = fh_compose(&tempfh, exp, dentry, NULL);
1469 if (status)
1470 goto out;
1471 fhp = &tempfh;
1472 }
1473 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1474 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1475 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1476 aclsupport = (err == 0);
1477 if (bmval0 & FATTR4_WORD0_ACL) {
1478 if (err == -EOPNOTSUPP)
1479 bmval0 &= ~FATTR4_WORD0_ACL;
1480 else if (err == -EINVAL) {
1481 status = nfserr_attrnotsupp;
1482 goto out;
1483 } else if (err != 0)
1484 goto out_nfserr;
1485 }
1486 }
1487 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1488 if (exp->ex_fslocs.locations == NULL) {
1489 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1490 }
1491 }
1492 if ((buflen -= 16) < 0)
1493 goto out_resource;
1494
1495 WRITE32(2);
1496 WRITE32(bmval0);
1497 WRITE32(bmval1);
1498 attrlenp = p++; /* to be backfilled later */
1499
1500 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1501 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1502 if ((buflen -= 12) < 0)
1503 goto out_resource;
1504 if (!aclsupport)
1505 word0 &= ~FATTR4_WORD0_ACL;
1506 if (!exp->ex_fslocs.locations)
1507 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1508 WRITE32(2);
1509 WRITE32(word0);
1510 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1511 }
1512 if (bmval0 & FATTR4_WORD0_TYPE) {
1513 if ((buflen -= 4) < 0)
1514 goto out_resource;
1515 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1516 if (dummy == NF4BAD)
1517 goto out_serverfault;
1518 WRITE32(dummy);
1519 }
1520 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1521 if ((buflen -= 4) < 0)
1522 goto out_resource;
1523 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1524 WRITE32(NFS4_FH_PERSISTENT);
1525 else
1526 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1527 }
1528 if (bmval0 & FATTR4_WORD0_CHANGE) {
1529 /*
1530 * Note: This _must_ be consistent with the scheme for writing
1531 * change_info, so any changes made here must be reflected there
1532 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1533 * macro above.)
1534 */
1535 if ((buflen -= 8) < 0)
1536 goto out_resource;
1537 WRITE32(stat.ctime.tv_sec);
1538 WRITE32(stat.ctime.tv_nsec);
1539 }
1540 if (bmval0 & FATTR4_WORD0_SIZE) {
1541 if ((buflen -= 8) < 0)
1542 goto out_resource;
1543 WRITE64(stat.size);
1544 }
1545 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1546 if ((buflen -= 4) < 0)
1547 goto out_resource;
1548 WRITE32(1);
1549 }
1550 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1551 if ((buflen -= 4) < 0)
1552 goto out_resource;
1553 WRITE32(1);
1554 }
1555 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1556 if ((buflen -= 4) < 0)
1557 goto out_resource;
1558 WRITE32(0);
1559 }
1560 if (bmval0 & FATTR4_WORD0_FSID) {
1561 if ((buflen -= 16) < 0)
1562 goto out_resource;
1563 if (exp->ex_fslocs.migrated) {
1564 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1565 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1566 } else if (is_fsid(fhp, rqstp->rq_reffh)) {
1567 WRITE64((u64)exp->ex_fsid);
1568 WRITE64((u64)0);
1569 } else {
1570 WRITE32(0);
1571 WRITE32(MAJOR(stat.dev));
1572 WRITE32(0);
1573 WRITE32(MINOR(stat.dev));
1574 }
1575 }
1576 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1577 if ((buflen -= 4) < 0)
1578 goto out_resource;
1579 WRITE32(0);
1580 }
1581 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1582 if ((buflen -= 4) < 0)
1583 goto out_resource;
1584 WRITE32(NFSD_LEASE_TIME);
1585 }
1586 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1587 if ((buflen -= 4) < 0)
1588 goto out_resource;
1589 WRITE32(rdattr_err);
1590 }
1591 if (bmval0 & FATTR4_WORD0_ACL) {
1592 struct nfs4_ace *ace;
1593 struct list_head *h;
1594
1595 if (acl == NULL) {
1596 if ((buflen -= 4) < 0)
1597 goto out_resource;
1598
1599 WRITE32(0);
1600 goto out_acl;
1601 }
1602 if ((buflen -= 4) < 0)
1603 goto out_resource;
1604 WRITE32(acl->naces);
1605
1606 list_for_each(h, &acl->ace_head) {
1607 ace = list_entry(h, struct nfs4_ace, l_ace);
1608
1609 if ((buflen -= 4*3) < 0)
1610 goto out_resource;
1611 WRITE32(ace->type);
1612 WRITE32(ace->flag);
1613 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1614 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1615 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1616 &p, &buflen);
1617 if (status == nfserr_resource)
1618 goto out_resource;
1619 if (status)
1620 goto out;
1621 }
1622 }
1623 out_acl:
1624 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1625 if ((buflen -= 4) < 0)
1626 goto out_resource;
1627 WRITE32(aclsupport ?
1628 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1629 }
1630 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1631 if ((buflen -= 4) < 0)
1632 goto out_resource;
1633 WRITE32(1);
1634 }
1635 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1636 if ((buflen -= 4) < 0)
1637 goto out_resource;
1638 WRITE32(1);
1639 }
1640 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1641 if ((buflen -= 4) < 0)
1642 goto out_resource;
1643 WRITE32(1);
1644 }
1645 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1646 if ((buflen -= 4) < 0)
1647 goto out_resource;
1648 WRITE32(1);
1649 }
1650 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1651 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1652 if (buflen < 0)
1653 goto out_resource;
1654 WRITE32(fhp->fh_handle.fh_size);
1655 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1656 }
1657 if (bmval0 & FATTR4_WORD0_FILEID) {
1658 if ((buflen -= 8) < 0)
1659 goto out_resource;
1660 WRITE64((u64) stat.ino);
1661 }
1662 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1663 if ((buflen -= 8) < 0)
1664 goto out_resource;
1665 WRITE64((u64) statfs.f_ffree);
1666 }
1667 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1668 if ((buflen -= 8) < 0)
1669 goto out_resource;
1670 WRITE64((u64) statfs.f_ffree);
1671 }
1672 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1673 if ((buflen -= 8) < 0)
1674 goto out_resource;
1675 WRITE64((u64) statfs.f_files);
1676 }
1677 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1678 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1679 if (status == nfserr_resource)
1680 goto out_resource;
1681 if (status)
1682 goto out;
1683 }
1684 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1685 if ((buflen -= 4) < 0)
1686 goto out_resource;
1687 WRITE32(1);
1688 }
1689 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1690 if ((buflen -= 8) < 0)
1691 goto out_resource;
1692 WRITE64(~(u64)0);
1693 }
1694 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1695 if ((buflen -= 4) < 0)
1696 goto out_resource;
1697 WRITE32(255);
1698 }
1699 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1700 if ((buflen -= 4) < 0)
1701 goto out_resource;
1702 WRITE32(~(u32) 0);
1703 }
1704 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1705 if ((buflen -= 8) < 0)
1706 goto out_resource;
1707 WRITE64((u64) svc_max_payload(rqstp));
1708 }
1709 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1710 if ((buflen -= 8) < 0)
1711 goto out_resource;
1712 WRITE64((u64) svc_max_payload(rqstp));
1713 }
1714 if (bmval1 & FATTR4_WORD1_MODE) {
1715 if ((buflen -= 4) < 0)
1716 goto out_resource;
1717 WRITE32(stat.mode & S_IALLUGO);
1718 }
1719 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1720 if ((buflen -= 4) < 0)
1721 goto out_resource;
1722 WRITE32(1);
1723 }
1724 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1725 if ((buflen -= 4) < 0)
1726 goto out_resource;
1727 WRITE32(stat.nlink);
1728 }
1729 if (bmval1 & FATTR4_WORD1_OWNER) {
1730 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1731 if (status == nfserr_resource)
1732 goto out_resource;
1733 if (status)
1734 goto out;
1735 }
1736 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1737 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1738 if (status == nfserr_resource)
1739 goto out_resource;
1740 if (status)
1741 goto out;
1742 }
1743 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1744 if ((buflen -= 8) < 0)
1745 goto out_resource;
1746 WRITE32((u32) MAJOR(stat.rdev));
1747 WRITE32((u32) MINOR(stat.rdev));
1748 }
1749 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1750 if ((buflen -= 8) < 0)
1751 goto out_resource;
1752 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1753 WRITE64(dummy64);
1754 }
1755 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1756 if ((buflen -= 8) < 0)
1757 goto out_resource;
1758 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1759 WRITE64(dummy64);
1760 }
1761 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1762 if ((buflen -= 8) < 0)
1763 goto out_resource;
1764 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1765 WRITE64(dummy64);
1766 }
1767 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1768 if ((buflen -= 8) < 0)
1769 goto out_resource;
1770 dummy64 = (u64)stat.blocks << 9;
1771 WRITE64(dummy64);
1772 }
1773 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1774 if ((buflen -= 12) < 0)
1775 goto out_resource;
1776 WRITE32(0);
1777 WRITE32(stat.atime.tv_sec);
1778 WRITE32(stat.atime.tv_nsec);
1779 }
1780 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1781 if ((buflen -= 12) < 0)
1782 goto out_resource;
1783 WRITE32(0);
1784 WRITE32(1);
1785 WRITE32(0);
1786 }
1787 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1788 if ((buflen -= 12) < 0)
1789 goto out_resource;
1790 WRITE32(0);
1791 WRITE32(stat.ctime.tv_sec);
1792 WRITE32(stat.ctime.tv_nsec);
1793 }
1794 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1795 if ((buflen -= 12) < 0)
1796 goto out_resource;
1797 WRITE32(0);
1798 WRITE32(stat.mtime.tv_sec);
1799 WRITE32(stat.mtime.tv_nsec);
1800 }
1801 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1802 struct dentry *mnt_pnt, *mnt_root;
1803
1804 if ((buflen -= 8) < 0)
1805 goto out_resource;
1806 mnt_root = exp->ex_mnt->mnt_root;
1807 if (mnt_root->d_inode == dentry->d_inode) {
1808 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1809 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1810 } else
1811 WRITE64((u64) stat.ino);
1812 }
1813 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1814 *countp = p - buffer;
1815 status = nfs_ok;
1816
1817 out:
1818 nfs4_acl_free(acl);
1819 if (fhp == &tempfh)
1820 fh_put(&tempfh);
1821 return status;
1822 out_nfserr:
1823 status = nfserrno(err);
1824 goto out;
1825 out_resource:
1826 *countp = 0;
1827 status = nfserr_resource;
1828 goto out;
1829 out_serverfault:
1830 status = nfserr_serverfault;
1831 goto out;
1832 }
1833
1834 static __be32
1835 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1836 const char *name, int namlen, __be32 *p, int *buflen)
1837 {
1838 struct svc_export *exp = cd->rd_fhp->fh_export;
1839 struct dentry *dentry;
1840 __be32 nfserr;
1841
1842 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1843 if (IS_ERR(dentry))
1844 return nfserrno(PTR_ERR(dentry));
1845
1846 exp_get(exp);
1847 if (d_mountpoint(dentry)) {
1848 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1849 /*
1850 * -EAGAIN is the only error returned from
1851 * nfsd_cross_mnt() and it indicates that an
1852 * up-call has been initiated to fill in the export
1853 * options on exp. When the answer comes back,
1854 * this call will be retried.
1855 */
1856 nfserr = nfserr_dropit;
1857 goto out_put;
1858 }
1859
1860 }
1861 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1862 cd->rd_rqstp);
1863 out_put:
1864 dput(dentry);
1865 exp_put(exp);
1866 return nfserr;
1867 }
1868
1869 static __be32 *
1870 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1871 {
1872 __be32 *attrlenp;
1873
1874 if (buflen < 6)
1875 return NULL;
1876 *p++ = htonl(2);
1877 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1878 *p++ = htonl(0); /* bmval1 */
1879
1880 attrlenp = p++;
1881 *p++ = nfserr; /* no htonl */
1882 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1883 return p;
1884 }
1885
1886 static int
1887 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1888 loff_t offset, ino_t ino, unsigned int d_type)
1889 {
1890 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1891 int buflen;
1892 __be32 *p = cd->buffer;
1893 __be32 nfserr = nfserr_toosmall;
1894
1895 /* In nfsv4, "." and ".." never make it onto the wire.. */
1896 if (name && isdotent(name, namlen)) {
1897 cd->common.err = nfs_ok;
1898 return 0;
1899 }
1900
1901 if (cd->offset)
1902 xdr_encode_hyper(cd->offset, (u64) offset);
1903
1904 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1905 if (buflen < 0)
1906 goto fail;
1907
1908 *p++ = xdr_one; /* mark entry present */
1909 cd->offset = p; /* remember pointer */
1910 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1911 p = xdr_encode_array(p, name, namlen); /* name length & name */
1912
1913 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1914 switch (nfserr) {
1915 case nfs_ok:
1916 p += buflen;
1917 break;
1918 case nfserr_resource:
1919 nfserr = nfserr_toosmall;
1920 goto fail;
1921 case nfserr_dropit:
1922 goto fail;
1923 default:
1924 /*
1925 * If the client requested the RDATTR_ERROR attribute,
1926 * we stuff the error code into this attribute
1927 * and continue. If this attribute was not requested,
1928 * then in accordance with the spec, we fail the
1929 * entire READDIR operation(!)
1930 */
1931 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1932 goto fail;
1933 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1934 if (p == NULL) {
1935 nfserr = nfserr_toosmall;
1936 goto fail;
1937 }
1938 }
1939 cd->buflen -= (p - cd->buffer);
1940 cd->buffer = p;
1941 cd->common.err = nfs_ok;
1942 return 0;
1943 fail:
1944 cd->common.err = nfserr;
1945 return -EINVAL;
1946 }
1947
1948 static void
1949 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1950 {
1951 ENCODE_HEAD;
1952
1953 if (!nfserr) {
1954 RESERVE_SPACE(8);
1955 WRITE32(access->ac_supported);
1956 WRITE32(access->ac_resp_access);
1957 ADJUST_ARGS();
1958 }
1959 }
1960
1961 static void
1962 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1963 {
1964 ENCODE_SEQID_OP_HEAD;
1965
1966 if (!nfserr) {
1967 RESERVE_SPACE(sizeof(stateid_t));
1968 WRITE32(close->cl_stateid.si_generation);
1969 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1970 ADJUST_ARGS();
1971 }
1972 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1973 }
1974
1975
1976 static void
1977 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1978 {
1979 ENCODE_HEAD;
1980
1981 if (!nfserr) {
1982 RESERVE_SPACE(8);
1983 WRITEMEM(commit->co_verf.data, 8);
1984 ADJUST_ARGS();
1985 }
1986 }
1987
1988 static void
1989 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1990 {
1991 ENCODE_HEAD;
1992
1993 if (!nfserr) {
1994 RESERVE_SPACE(32);
1995 WRITECINFO(create->cr_cinfo);
1996 WRITE32(2);
1997 WRITE32(create->cr_bmval[0]);
1998 WRITE32(create->cr_bmval[1]);
1999 ADJUST_ARGS();
2000 }
2001 }
2002
2003 static __be32
2004 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2005 {
2006 struct svc_fh *fhp = getattr->ga_fhp;
2007 int buflen;
2008
2009 if (nfserr)
2010 return nfserr;
2011
2012 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2013 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2014 resp->p, &buflen, getattr->ga_bmval,
2015 resp->rqstp);
2016 if (!nfserr)
2017 resp->p += buflen;
2018 return nfserr;
2019 }
2020
2021 static void
2022 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
2023 {
2024 unsigned int len;
2025 ENCODE_HEAD;
2026
2027 if (!nfserr) {
2028 len = fhp->fh_handle.fh_size;
2029 RESERVE_SPACE(len + 4);
2030 WRITE32(len);
2031 WRITEMEM(&fhp->fh_handle.fh_base, len);
2032 ADJUST_ARGS();
2033 }
2034 }
2035
2036 /*
2037 * Including all fields other than the name, a LOCK4denied structure requires
2038 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2039 */
2040 static void
2041 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2042 {
2043 ENCODE_HEAD;
2044
2045 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2046 WRITE64(ld->ld_start);
2047 WRITE64(ld->ld_length);
2048 WRITE32(ld->ld_type);
2049 if (ld->ld_sop) {
2050 WRITEMEM(&ld->ld_clientid, 8);
2051 WRITE32(ld->ld_sop->so_owner.len);
2052 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2053 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2054 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2055 WRITE64((u64)0); /* clientid */
2056 WRITE32(0); /* length of owner name */
2057 }
2058 ADJUST_ARGS();
2059 }
2060
2061 static void
2062 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2063 {
2064 ENCODE_SEQID_OP_HEAD;
2065
2066 if (!nfserr) {
2067 RESERVE_SPACE(4 + sizeof(stateid_t));
2068 WRITE32(lock->lk_resp_stateid.si_generation);
2069 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2070 ADJUST_ARGS();
2071 } else if (nfserr == nfserr_denied)
2072 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2073
2074 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2075 }
2076
2077 static void
2078 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2079 {
2080 if (nfserr == nfserr_denied)
2081 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2082 }
2083
2084 static void
2085 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2086 {
2087 ENCODE_SEQID_OP_HEAD;
2088
2089 if (!nfserr) {
2090 RESERVE_SPACE(sizeof(stateid_t));
2091 WRITE32(locku->lu_stateid.si_generation);
2092 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2093 ADJUST_ARGS();
2094 }
2095
2096 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2097 }
2098
2099
2100 static void
2101 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2102 {
2103 ENCODE_HEAD;
2104
2105 if (!nfserr) {
2106 RESERVE_SPACE(20);
2107 WRITECINFO(link->li_cinfo);
2108 ADJUST_ARGS();
2109 }
2110 }
2111
2112
2113 static void
2114 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2115 {
2116 ENCODE_SEQID_OP_HEAD;
2117
2118 if (nfserr)
2119 goto out;
2120
2121 RESERVE_SPACE(36 + sizeof(stateid_t));
2122 WRITE32(open->op_stateid.si_generation);
2123 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2124 WRITECINFO(open->op_cinfo);
2125 WRITE32(open->op_rflags);
2126 WRITE32(2);
2127 WRITE32(open->op_bmval[0]);
2128 WRITE32(open->op_bmval[1]);
2129 WRITE32(open->op_delegate_type);
2130 ADJUST_ARGS();
2131
2132 switch (open->op_delegate_type) {
2133 case NFS4_OPEN_DELEGATE_NONE:
2134 break;
2135 case NFS4_OPEN_DELEGATE_READ:
2136 RESERVE_SPACE(20 + sizeof(stateid_t));
2137 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2138 WRITE32(open->op_recall);
2139
2140 /*
2141 * TODO: ACE's in delegations
2142 */
2143 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2144 WRITE32(0);
2145 WRITE32(0);
2146 WRITE32(0); /* XXX: is NULL principal ok? */
2147 ADJUST_ARGS();
2148 break;
2149 case NFS4_OPEN_DELEGATE_WRITE:
2150 RESERVE_SPACE(32 + sizeof(stateid_t));
2151 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2152 WRITE32(0);
2153
2154 /*
2155 * TODO: space_limit's in delegations
2156 */
2157 WRITE32(NFS4_LIMIT_SIZE);
2158 WRITE32(~(u32)0);
2159 WRITE32(~(u32)0);
2160
2161 /*
2162 * TODO: ACE's in delegations
2163 */
2164 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2165 WRITE32(0);
2166 WRITE32(0);
2167 WRITE32(0); /* XXX: is NULL principal ok? */
2168 ADJUST_ARGS();
2169 break;
2170 default:
2171 BUG();
2172 }
2173 /* XXX save filehandle here */
2174 out:
2175 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2176 }
2177
2178 static void
2179 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2180 {
2181 ENCODE_SEQID_OP_HEAD;
2182
2183 if (!nfserr) {
2184 RESERVE_SPACE(sizeof(stateid_t));
2185 WRITE32(oc->oc_resp_stateid.si_generation);
2186 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2187 ADJUST_ARGS();
2188 }
2189
2190 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2191 }
2192
2193 static void
2194 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2195 {
2196 ENCODE_SEQID_OP_HEAD;
2197
2198 if (!nfserr) {
2199 RESERVE_SPACE(sizeof(stateid_t));
2200 WRITE32(od->od_stateid.si_generation);
2201 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2202 ADJUST_ARGS();
2203 }
2204
2205 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2206 }
2207
2208 static __be32
2209 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2210 struct nfsd4_read *read)
2211 {
2212 u32 eof;
2213 int v, pn;
2214 unsigned long maxcount;
2215 long len;
2216 ENCODE_HEAD;
2217
2218 if (nfserr)
2219 return nfserr;
2220 if (resp->xbuf->page_len)
2221 return nfserr_resource;
2222
2223 RESERVE_SPACE(8); /* eof flag and byte count */
2224
2225 maxcount = svc_max_payload(resp->rqstp);
2226 if (maxcount > read->rd_length)
2227 maxcount = read->rd_length;
2228
2229 len = maxcount;
2230 v = 0;
2231 while (len > 0) {
2232 pn = resp->rqstp->rq_resused++;
2233 resp->rqstp->rq_vec[v].iov_base =
2234 page_address(resp->rqstp->rq_respages[pn]);
2235 resp->rqstp->rq_vec[v].iov_len =
2236 len < PAGE_SIZE ? len : PAGE_SIZE;
2237 v++;
2238 len -= PAGE_SIZE;
2239 }
2240 read->rd_vlen = v;
2241
2242 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2243 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2244 &maxcount);
2245
2246 if (nfserr == nfserr_symlink)
2247 nfserr = nfserr_inval;
2248 if (nfserr)
2249 return nfserr;
2250 eof = (read->rd_offset + maxcount >=
2251 read->rd_fhp->fh_dentry->d_inode->i_size);
2252
2253 WRITE32(eof);
2254 WRITE32(maxcount);
2255 ADJUST_ARGS();
2256 resp->xbuf->head[0].iov_len = (char*)p
2257 - (char*)resp->xbuf->head[0].iov_base;
2258 resp->xbuf->page_len = maxcount;
2259
2260 /* Use rest of head for padding and remaining ops: */
2261 resp->xbuf->tail[0].iov_base = p;
2262 resp->xbuf->tail[0].iov_len = 0;
2263 if (maxcount&3) {
2264 RESERVE_SPACE(4);
2265 WRITE32(0);
2266 resp->xbuf->tail[0].iov_base += maxcount&3;
2267 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2268 ADJUST_ARGS();
2269 }
2270 return 0;
2271 }
2272
2273 static __be32
2274 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2275 {
2276 int maxcount;
2277 char *page;
2278 ENCODE_HEAD;
2279
2280 if (nfserr)
2281 return nfserr;
2282 if (resp->xbuf->page_len)
2283 return nfserr_resource;
2284
2285 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2286
2287 maxcount = PAGE_SIZE;
2288 RESERVE_SPACE(4);
2289
2290 /*
2291 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2292 * if they would overflow the buffer. Is this kosher in NFSv4? If
2293 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2294 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2295 */
2296 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2297 if (nfserr == nfserr_isdir)
2298 return nfserr_inval;
2299 if (nfserr)
2300 return nfserr;
2301
2302 WRITE32(maxcount);
2303 ADJUST_ARGS();
2304 resp->xbuf->head[0].iov_len = (char*)p
2305 - (char*)resp->xbuf->head[0].iov_base;
2306 resp->xbuf->page_len = maxcount;
2307
2308 /* Use rest of head for padding and remaining ops: */
2309 resp->xbuf->tail[0].iov_base = p;
2310 resp->xbuf->tail[0].iov_len = 0;
2311 if (maxcount&3) {
2312 RESERVE_SPACE(4);
2313 WRITE32(0);
2314 resp->xbuf->tail[0].iov_base += maxcount&3;
2315 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2316 ADJUST_ARGS();
2317 }
2318 return 0;
2319 }
2320
2321 static __be32
2322 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2323 {
2324 int maxcount;
2325 loff_t offset;
2326 __be32 *page, *savep, *tailbase;
2327 ENCODE_HEAD;
2328
2329 if (nfserr)
2330 return nfserr;
2331 if (resp->xbuf->page_len)
2332 return nfserr_resource;
2333
2334 RESERVE_SPACE(8); /* verifier */
2335 savep = p;
2336
2337 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2338 WRITE32(0);
2339 WRITE32(0);
2340 ADJUST_ARGS();
2341 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2342 tailbase = p;
2343
2344 maxcount = PAGE_SIZE;
2345 if (maxcount > readdir->rd_maxcount)
2346 maxcount = readdir->rd_maxcount;
2347
2348 /*
2349 * Convert from bytes to words, account for the two words already
2350 * written, make sure to leave two words at the end for the next
2351 * pointer and eof field.
2352 */
2353 maxcount = (maxcount >> 2) - 4;
2354 if (maxcount < 0) {
2355 nfserr = nfserr_toosmall;
2356 goto err_no_verf;
2357 }
2358
2359 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2360 readdir->common.err = 0;
2361 readdir->buflen = maxcount;
2362 readdir->buffer = page;
2363 readdir->offset = NULL;
2364
2365 offset = readdir->rd_cookie;
2366 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2367 &offset,
2368 &readdir->common, nfsd4_encode_dirent);
2369 if (nfserr == nfs_ok &&
2370 readdir->common.err == nfserr_toosmall &&
2371 readdir->buffer == page)
2372 nfserr = nfserr_toosmall;
2373 if (nfserr == nfserr_symlink)
2374 nfserr = nfserr_notdir;
2375 if (nfserr)
2376 goto err_no_verf;
2377
2378 if (readdir->offset)
2379 xdr_encode_hyper(readdir->offset, offset);
2380
2381 p = readdir->buffer;
2382 *p++ = 0; /* no more entries */
2383 *p++ = htonl(readdir->common.err == nfserr_eof);
2384 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2385 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2386
2387 /* Use rest of head for padding and remaining ops: */
2388 resp->xbuf->tail[0].iov_base = tailbase;
2389 resp->xbuf->tail[0].iov_len = 0;
2390 resp->p = resp->xbuf->tail[0].iov_base;
2391 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2392
2393 return 0;
2394 err_no_verf:
2395 p = savep;
2396 ADJUST_ARGS();
2397 return nfserr;
2398 }
2399
2400 static void
2401 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2402 {
2403 ENCODE_HEAD;
2404
2405 if (!nfserr) {
2406 RESERVE_SPACE(20);
2407 WRITECINFO(remove->rm_cinfo);
2408 ADJUST_ARGS();
2409 }
2410 }
2411
2412 static void
2413 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2414 {
2415 ENCODE_HEAD;
2416
2417 if (!nfserr) {
2418 RESERVE_SPACE(40);
2419 WRITECINFO(rename->rn_sinfo);
2420 WRITECINFO(rename->rn_tinfo);
2421 ADJUST_ARGS();
2422 }
2423 }
2424
2425 /*
2426 * The SETATTR encode routine is special -- it always encodes a bitmap,
2427 * regardless of the error status.
2428 */
2429 static void
2430 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2431 {
2432 ENCODE_HEAD;
2433
2434 RESERVE_SPACE(12);
2435 if (nfserr) {
2436 WRITE32(2);
2437 WRITE32(0);
2438 WRITE32(0);
2439 }
2440 else {
2441 WRITE32(2);
2442 WRITE32(setattr->sa_bmval[0]);
2443 WRITE32(setattr->sa_bmval[1]);
2444 }
2445 ADJUST_ARGS();
2446 }
2447
2448 static void
2449 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2450 {
2451 ENCODE_HEAD;
2452
2453 if (!nfserr) {
2454 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2455 WRITEMEM(&scd->se_clientid, 8);
2456 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2457 ADJUST_ARGS();
2458 }
2459 else if (nfserr == nfserr_clid_inuse) {
2460 RESERVE_SPACE(8);
2461 WRITE32(0);
2462 WRITE32(0);
2463 ADJUST_ARGS();
2464 }
2465 }
2466
2467 static void
2468 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2469 {
2470 ENCODE_HEAD;
2471
2472 if (!nfserr) {
2473 RESERVE_SPACE(16);
2474 WRITE32(write->wr_bytes_written);
2475 WRITE32(write->wr_how_written);
2476 WRITEMEM(write->wr_verifier.data, 8);
2477 ADJUST_ARGS();
2478 }
2479 }
2480
2481 void
2482 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2483 {
2484 __be32 *statp;
2485 ENCODE_HEAD;
2486
2487 RESERVE_SPACE(8);
2488 WRITE32(op->opnum);
2489 statp = p++; /* to be backfilled at the end */
2490 ADJUST_ARGS();
2491
2492 switch (op->opnum) {
2493 case OP_ACCESS:
2494 nfsd4_encode_access(resp, op->status, &op->u.access);
2495 break;
2496 case OP_CLOSE:
2497 nfsd4_encode_close(resp, op->status, &op->u.close);
2498 break;
2499 case OP_COMMIT:
2500 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2501 break;
2502 case OP_CREATE:
2503 nfsd4_encode_create(resp, op->status, &op->u.create);
2504 break;
2505 case OP_DELEGRETURN:
2506 break;
2507 case OP_GETATTR:
2508 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2509 break;
2510 case OP_GETFH:
2511 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2512 break;
2513 case OP_LINK:
2514 nfsd4_encode_link(resp, op->status, &op->u.link);
2515 break;
2516 case OP_LOCK:
2517 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2518 break;
2519 case OP_LOCKT:
2520 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2521 break;
2522 case OP_LOCKU:
2523 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2524 break;
2525 case OP_LOOKUP:
2526 break;
2527 case OP_LOOKUPP:
2528 break;
2529 case OP_NVERIFY:
2530 break;
2531 case OP_OPEN:
2532 nfsd4_encode_open(resp, op->status, &op->u.open);
2533 break;
2534 case OP_OPEN_CONFIRM:
2535 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2536 break;
2537 case OP_OPEN_DOWNGRADE:
2538 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2539 break;
2540 case OP_PUTFH:
2541 break;
2542 case OP_PUTROOTFH:
2543 break;
2544 case OP_READ:
2545 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2546 break;
2547 case OP_READDIR:
2548 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2549 break;
2550 case OP_READLINK:
2551 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2552 break;
2553 case OP_REMOVE:
2554 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2555 break;
2556 case OP_RENAME:
2557 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2558 break;
2559 case OP_RENEW:
2560 break;
2561 case OP_RESTOREFH:
2562 break;
2563 case OP_SAVEFH:
2564 break;
2565 case OP_SETATTR:
2566 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2567 break;
2568 case OP_SETCLIENTID:
2569 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2570 break;
2571 case OP_SETCLIENTID_CONFIRM:
2572 break;
2573 case OP_VERIFY:
2574 break;
2575 case OP_WRITE:
2576 nfsd4_encode_write(resp, op->status, &op->u.write);
2577 break;
2578 case OP_RELEASE_LOCKOWNER:
2579 break;
2580 default:
2581 break;
2582 }
2583
2584 /*
2585 * Note: We write the status directly, instead of using WRITE32(),
2586 * since it is already in network byte order.
2587 */
2588 *statp = op->status;
2589 }
2590
2591 /*
2592 * Encode the reply stored in the stateowner reply cache
2593 *
2594 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2595 * previously sent already encoded operation.
2596 *
2597 * called with nfs4_lock_state() held
2598 */
2599 void
2600 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2601 {
2602 ENCODE_HEAD;
2603 struct nfs4_replay *rp = op->replay;
2604
2605 BUG_ON(!rp);
2606
2607 RESERVE_SPACE(8);
2608 WRITE32(op->opnum);
2609 *p++ = rp->rp_status; /* already xdr'ed */
2610 ADJUST_ARGS();
2611
2612 RESERVE_SPACE(rp->rp_buflen);
2613 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2614 ADJUST_ARGS();
2615 }
2616
2617 /*
2618 * END OF "GENERIC" ENCODE ROUTINES.
2619 */
2620
2621 int
2622 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2623 {
2624 return xdr_ressize_check(rqstp, p);
2625 }
2626
2627 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2628 {
2629 if (args->ops != args->iops) {
2630 kfree(args->ops);
2631 args->ops = args->iops;
2632 }
2633 kfree(args->tmpp);
2634 args->tmpp = NULL;
2635 while (args->to_free) {
2636 struct tmpbuf *tb = args->to_free;
2637 args->to_free = tb->next;
2638 tb->release(tb->buf);
2639 kfree(tb);
2640 }
2641 }
2642
2643 int
2644 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2645 {
2646 __be32 status;
2647
2648 args->p = p;
2649 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2650 args->pagelist = rqstp->rq_arg.pages;
2651 args->pagelen = rqstp->rq_arg.page_len;
2652 args->tmpp = NULL;
2653 args->to_free = NULL;
2654 args->ops = args->iops;
2655 args->rqstp = rqstp;
2656
2657 status = nfsd4_decode_compound(args);
2658 if (status) {
2659 nfsd4_release_compoundargs(args);
2660 }
2661 return !status;
2662 }
2663
2664 int
2665 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
2666 {
2667 /*
2668 * All that remains is to write the tag and operation count...
2669 */
2670 struct kvec *iov;
2671 p = resp->tagp;
2672 *p++ = htonl(resp->taglen);
2673 memcpy(p, resp->tag, resp->taglen);
2674 p += XDR_QUADLEN(resp->taglen);
2675 *p++ = htonl(resp->opcnt);
2676
2677 if (rqstp->rq_res.page_len)
2678 iov = &rqstp->rq_res.tail[0];
2679 else
2680 iov = &rqstp->rq_res.head[0];
2681 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2682 BUG_ON(iov->iov_len > PAGE_SIZE);
2683 return 1;
2684 }
2685
2686 /*
2687 * Local variables:
2688 * c-basic-offset: 8
2689 * End:
2690 */
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