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wait_task_zombie: don't fight with non-existing race with a dying ptracee
[wrt350n-kernel.git] / fs / nfsd / nfs4xdr.c
blob57333944af7fe5c63937472088c29b4725f006d2
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Server-side XDR for NFSv4
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
43 */
44
45 #include <linux/param.h>
46 #include <linux/smp.h>
47 #include <linux/fs.h>
48 #include <linux/namei.h>
49 #include <linux/vfs.h>
50 #include <linux/sunrpc/xdr.h>
51 #include <linux/sunrpc/svc.h>
52 #include <linux/sunrpc/clnt.h>
53 #include <linux/nfsd/nfsd.h>
54 #include <linux/nfsd/state.h>
55 #include <linux/nfsd/xdr4.h>
56 #include <linux/nfsd_idmap.h>
57 #include <linux/nfs4.h>
58 #include <linux/nfs4_acl.h>
59 #include <linux/sunrpc/gss_api.h>
60 #include <linux/sunrpc/svcauth_gss.h>
61
62 #define NFSDDBG_FACILITY NFSDDBG_XDR
63
64 /*
65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
66 * directory in order to indicate to the client that a filesystem boundary is present
67 * We use a fixed fsid for a referral
68 */
69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
71
72 static __be32
73 check_filename(char *str, int len, __be32 err)
74 {
75 int i;
76
77 if (len == 0)
78 return nfserr_inval;
79 if (isdotent(str, len))
80 return err;
81 for (i = 0; i < len; i++)
82 if (str[i] == '/')
83 return err;
84 return 0;
85 }
86
87 /*
88 * START OF "GENERIC" DECODE ROUTINES.
89 * These may look a little ugly since they are imported from a "generic"
90 * set of XDR encode/decode routines which are intended to be shared by
91 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 *
93 * If the pain of reading these is too great, it should be a straightforward
94 * task to translate them into Linux-specific versions which are more
95 * consistent with the style used in NFSv2/v3...
96 */
97 #define DECODE_HEAD \
98 __be32 *p; \
99 __be32 status
100 #define DECODE_TAIL \
101 status = 0; \
102 out: \
103 return status; \
104 xdr_error: \
105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
107 status = nfserr_bad_xdr; \
108 goto out
109
110 #define READ32(x) (x) = ntohl(*p++)
111 #define READ64(x) do { \
112 (x) = (u64)ntohl(*p++) << 32; \
113 (x) |= ntohl(*p++); \
114 } while (0)
115 #define READTIME(x) do { \
116 p++; \
117 (x) = ntohl(*p++); \
118 p++; \
119 } while (0)
120 #define READMEM(x,nbytes) do { \
121 x = (char *)p; \
122 p += XDR_QUADLEN(nbytes); \
123 } while (0)
124 #define SAVEMEM(x,nbytes) do { \
125 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
126 savemem(argp, p, nbytes) : \
127 (char *)p)) { \
128 dprintk("NFSD: xdr error (%s:%d)\n", \
129 __FILE__, __LINE__); \
130 goto xdr_error; \
131 } \
132 p += XDR_QUADLEN(nbytes); \
133 } while (0)
134 #define COPYMEM(x,nbytes) do { \
135 memcpy((x), p, nbytes); \
136 p += XDR_QUADLEN(nbytes); \
137 } while (0)
138
139 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
140 #define READ_BUF(nbytes) do { \
141 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
142 p = argp->p; \
143 argp->p += XDR_QUADLEN(nbytes); \
144 } else if (!(p = read_buf(argp, nbytes))) { \
145 dprintk("NFSD: xdr error (%s:%d)\n", \
146 __FILE__, __LINE__); \
147 goto xdr_error; \
148 } \
149 } while (0)
150
151 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
152 {
153 /* We want more bytes than seem to be available.
154 * Maybe we need a new page, maybe we have just run out
155 */
156 int avail = (char*)argp->end - (char*)argp->p;
157 __be32 *p;
158 if (avail + argp->pagelen < nbytes)
159 return NULL;
160 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
161 return NULL;
162 /* ok, we can do it with the current plus the next page */
163 if (nbytes <= sizeof(argp->tmp))
164 p = argp->tmp;
165 else {
166 kfree(argp->tmpp);
167 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
168 if (!p)
169 return NULL;
170
171 }
172 memcpy(p, argp->p, avail);
173 /* step to next page */
174 argp->p = page_address(argp->pagelist[0]);
175 argp->pagelist++;
176 if (argp->pagelen < PAGE_SIZE) {
177 argp->end = p + (argp->pagelen>>2);
178 argp->pagelen = 0;
179 } else {
180 argp->end = p + (PAGE_SIZE>>2);
181 argp->pagelen -= PAGE_SIZE;
182 }
183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
184 argp->p += XDR_QUADLEN(nbytes - avail);
185 return p;
186 }
187
188 static int
189 defer_free(struct nfsd4_compoundargs *argp,
190 void (*release)(const void *), void *p)
191 {
192 struct tmpbuf *tb;
193
194 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
195 if (!tb)
196 return -ENOMEM;
197 tb->buf = p;
198 tb->release = release;
199 tb->next = argp->to_free;
200 argp->to_free = tb;
201 return 0;
202 }
203
204 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
205 {
206 if (p == argp->tmp) {
207 p = kmalloc(nbytes, GFP_KERNEL);
208 if (!p)
209 return NULL;
210 memcpy(p, argp->tmp, nbytes);
211 } else {
212 BUG_ON(p != argp->tmpp);
213 argp->tmpp = NULL;
214 }
215 if (defer_free(argp, kfree, p)) {
216 kfree(p);
217 return NULL;
218 } else
219 return (char *)p;
220 }
221
222 static __be32
223 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
224 {
225 u32 bmlen;
226 DECODE_HEAD;
227
228 bmval[0] = 0;
229 bmval[1] = 0;
230
231 READ_BUF(4);
232 READ32(bmlen);
233 if (bmlen > 1000)
234 goto xdr_error;
235
236 READ_BUF(bmlen << 2);
237 if (bmlen > 0)
238 READ32(bmval[0]);
239 if (bmlen > 1)
240 READ32(bmval[1]);
241
242 DECODE_TAIL;
243 }
244
245 static __be32
246 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
247 struct nfs4_acl **acl)
248 {
249 int expected_len, len = 0;
250 u32 dummy32;
251 char *buf;
252 int host_err;
253
254 DECODE_HEAD;
255 iattr->ia_valid = 0;
256 if ((status = nfsd4_decode_bitmap(argp, bmval)))
257 return status;
258
259 /*
260 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
261 * read-only attributes return ERR_INVAL.
262 */
263 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
264 return nfserr_attrnotsupp;
265 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
266 return nfserr_inval;
267
268 READ_BUF(4);
269 READ32(expected_len);
270
271 if (bmval[0] & FATTR4_WORD0_SIZE) {
272 READ_BUF(8);
273 len += 8;
274 READ64(iattr->ia_size);
275 iattr->ia_valid |= ATTR_SIZE;
276 }
277 if (bmval[0] & FATTR4_WORD0_ACL) {
278 int nace;
279 struct nfs4_ace *ace;
280
281 READ_BUF(4); len += 4;
282 READ32(nace);
283
284 if (nace > NFS4_ACL_MAX)
285 return nfserr_resource;
286
287 *acl = nfs4_acl_new(nace);
288 if (*acl == NULL) {
289 host_err = -ENOMEM;
290 goto out_nfserr;
291 }
292 defer_free(argp, kfree, *acl);
293
294 (*acl)->naces = nace;
295 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
296 READ_BUF(16); len += 16;
297 READ32(ace->type);
298 READ32(ace->flag);
299 READ32(ace->access_mask);
300 READ32(dummy32);
301 READ_BUF(dummy32);
302 len += XDR_QUADLEN(dummy32) << 2;
303 READMEM(buf, dummy32);
304 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
305 host_err = 0;
306 if (ace->whotype != NFS4_ACL_WHO_NAMED)
307 ace->who = 0;
308 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
309 host_err = nfsd_map_name_to_gid(argp->rqstp,
310 buf, dummy32, &ace->who);
311 else
312 host_err = nfsd_map_name_to_uid(argp->rqstp,
313 buf, dummy32, &ace->who);
314 if (host_err)
315 goto out_nfserr;
316 }
317 } else
318 *acl = NULL;
319 if (bmval[1] & FATTR4_WORD1_MODE) {
320 READ_BUF(4);
321 len += 4;
322 READ32(iattr->ia_mode);
323 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
324 iattr->ia_valid |= ATTR_MODE;
325 }
326 if (bmval[1] & FATTR4_WORD1_OWNER) {
327 READ_BUF(4);
328 len += 4;
329 READ32(dummy32);
330 READ_BUF(dummy32);
331 len += (XDR_QUADLEN(dummy32) << 2);
332 READMEM(buf, dummy32);
333 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
334 goto out_nfserr;
335 iattr->ia_valid |= ATTR_UID;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
344 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
345 goto out_nfserr;
346 iattr->ia_valid |= ATTR_GID;
347 }
348 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 switch (dummy32) {
353 case NFS4_SET_TO_CLIENT_TIME:
354 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
355 all 32 bits of 'nseconds'. */
356 READ_BUF(12);
357 len += 12;
358 READ32(dummy32);
359 if (dummy32)
360 return nfserr_inval;
361 READ32(iattr->ia_atime.tv_sec);
362 READ32(iattr->ia_atime.tv_nsec);
363 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
364 return nfserr_inval;
365 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
366 break;
367 case NFS4_SET_TO_SERVER_TIME:
368 iattr->ia_valid |= ATTR_ATIME;
369 break;
370 default:
371 goto xdr_error;
372 }
373 }
374 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
375 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
376 all 32 bits of 'nseconds'. */
377 READ_BUF(12);
378 len += 12;
379 READ32(dummy32);
380 if (dummy32)
381 return nfserr_inval;
382 READ32(iattr->ia_ctime.tv_sec);
383 READ32(iattr->ia_ctime.tv_nsec);
384 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
385 return nfserr_inval;
386 iattr->ia_valid |= ATTR_CTIME;
387 }
388 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
389 READ_BUF(4);
390 len += 4;
391 READ32(dummy32);
392 switch (dummy32) {
393 case NFS4_SET_TO_CLIENT_TIME:
394 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
395 all 32 bits of 'nseconds'. */
396 READ_BUF(12);
397 len += 12;
398 READ32(dummy32);
399 if (dummy32)
400 return nfserr_inval;
401 READ32(iattr->ia_mtime.tv_sec);
402 READ32(iattr->ia_mtime.tv_nsec);
403 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
404 return nfserr_inval;
405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
406 break;
407 case NFS4_SET_TO_SERVER_TIME:
408 iattr->ia_valid |= ATTR_MTIME;
409 break;
410 default:
411 goto xdr_error;
412 }
413 }
414 if (len != expected_len)
415 goto xdr_error;
416
417 DECODE_TAIL;
418
419 out_nfserr:
420 status = nfserrno(host_err);
421 goto out;
422 }
423
424 static __be32
425 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
426 {
427 DECODE_HEAD;
428
429 READ_BUF(4);
430 READ32(access->ac_req_access);
431
432 DECODE_TAIL;
433 }
434
435 static __be32
436 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
437 {
438 DECODE_HEAD;
439
440 close->cl_stateowner = NULL;
441 READ_BUF(4 + sizeof(stateid_t));
442 READ32(close->cl_seqid);
443 READ32(close->cl_stateid.si_generation);
444 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
445
446 DECODE_TAIL;
447 }
448
449
450 static __be32
451 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
452 {
453 DECODE_HEAD;
454
455 READ_BUF(12);
456 READ64(commit->co_offset);
457 READ32(commit->co_count);
458
459 DECODE_TAIL;
460 }
461
462 static __be32
463 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
464 {
465 DECODE_HEAD;
466
467 READ_BUF(4);
468 READ32(create->cr_type);
469 switch (create->cr_type) {
470 case NF4LNK:
471 READ_BUF(4);
472 READ32(create->cr_linklen);
473 READ_BUF(create->cr_linklen);
474 SAVEMEM(create->cr_linkname, create->cr_linklen);
475 break;
476 case NF4BLK:
477 case NF4CHR:
478 READ_BUF(8);
479 READ32(create->cr_specdata1);
480 READ32(create->cr_specdata2);
481 break;
482 case NF4SOCK:
483 case NF4FIFO:
484 case NF4DIR:
485 default:
486 break;
487 }
488
489 READ_BUF(4);
490 READ32(create->cr_namelen);
491 READ_BUF(create->cr_namelen);
492 SAVEMEM(create->cr_name, create->cr_namelen);
493 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
494 return status;
495
496 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
497 goto out;
498
499 DECODE_TAIL;
500 }
501
502 static inline __be32
503 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
504 {
505 DECODE_HEAD;
506
507 READ_BUF(sizeof(stateid_t));
508 READ32(dr->dr_stateid.si_generation);
509 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
510
511 DECODE_TAIL;
512 }
513
514 static inline __be32
515 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
516 {
517 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
518 }
519
520 static __be32
521 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
522 {
523 DECODE_HEAD;
524
525 READ_BUF(4);
526 READ32(link->li_namelen);
527 READ_BUF(link->li_namelen);
528 SAVEMEM(link->li_name, link->li_namelen);
529 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
530 return status;
531
532 DECODE_TAIL;
533 }
534
535 static __be32
536 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
537 {
538 DECODE_HEAD;
539
540 lock->lk_replay_owner = NULL;
541 /*
542 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
543 */
544 READ_BUF(28);
545 READ32(lock->lk_type);
546 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
547 goto xdr_error;
548 READ32(lock->lk_reclaim);
549 READ64(lock->lk_offset);
550 READ64(lock->lk_length);
551 READ32(lock->lk_is_new);
552
553 if (lock->lk_is_new) {
554 READ_BUF(36);
555 READ32(lock->lk_new_open_seqid);
556 READ32(lock->lk_new_open_stateid.si_generation);
557
558 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
559 READ32(lock->lk_new_lock_seqid);
560 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
561 READ32(lock->lk_new_owner.len);
562 READ_BUF(lock->lk_new_owner.len);
563 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
564 } else {
565 READ_BUF(20);
566 READ32(lock->lk_old_lock_stateid.si_generation);
567 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
568 READ32(lock->lk_old_lock_seqid);
569 }
570
571 DECODE_TAIL;
572 }
573
574 static __be32
575 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
576 {
577 DECODE_HEAD;
578
579 READ_BUF(32);
580 READ32(lockt->lt_type);
581 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
582 goto xdr_error;
583 READ64(lockt->lt_offset);
584 READ64(lockt->lt_length);
585 COPYMEM(&lockt->lt_clientid, 8);
586 READ32(lockt->lt_owner.len);
587 READ_BUF(lockt->lt_owner.len);
588 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
589
590 DECODE_TAIL;
591 }
592
593 static __be32
594 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
595 {
596 DECODE_HEAD;
597
598 locku->lu_stateowner = NULL;
599 READ_BUF(24 + sizeof(stateid_t));
600 READ32(locku->lu_type);
601 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
602 goto xdr_error;
603 READ32(locku->lu_seqid);
604 READ32(locku->lu_stateid.si_generation);
605 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
606 READ64(locku->lu_offset);
607 READ64(locku->lu_length);
608
609 DECODE_TAIL;
610 }
611
612 static __be32
613 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
614 {
615 DECODE_HEAD;
616
617 READ_BUF(4);
618 READ32(lookup->lo_len);
619 READ_BUF(lookup->lo_len);
620 SAVEMEM(lookup->lo_name, lookup->lo_len);
621 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
622 return status;
623
624 DECODE_TAIL;
625 }
626
627 static __be32
628 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
629 {
630 DECODE_HEAD;
631
632 memset(open->op_bmval, 0, sizeof(open->op_bmval));
633 open->op_iattr.ia_valid = 0;
634 open->op_stateowner = NULL;
635
636 /* seqid, share_access, share_deny, clientid, ownerlen */
637 READ_BUF(16 + sizeof(clientid_t));
638 READ32(open->op_seqid);
639 READ32(open->op_share_access);
640 READ32(open->op_share_deny);
641 COPYMEM(&open->op_clientid, sizeof(clientid_t));
642 READ32(open->op_owner.len);
643
644 /* owner, open_flag */
645 READ_BUF(open->op_owner.len + 4);
646 SAVEMEM(open->op_owner.data, open->op_owner.len);
647 READ32(open->op_create);
648 switch (open->op_create) {
649 case NFS4_OPEN_NOCREATE:
650 break;
651 case NFS4_OPEN_CREATE:
652 READ_BUF(4);
653 READ32(open->op_createmode);
654 switch (open->op_createmode) {
655 case NFS4_CREATE_UNCHECKED:
656 case NFS4_CREATE_GUARDED:
657 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
658 goto out;
659 break;
660 case NFS4_CREATE_EXCLUSIVE:
661 READ_BUF(8);
662 COPYMEM(open->op_verf.data, 8);
663 break;
664 default:
665 goto xdr_error;
666 }
667 break;
668 default:
669 goto xdr_error;
670 }
671
672 /* open_claim */
673 READ_BUF(4);
674 READ32(open->op_claim_type);
675 switch (open->op_claim_type) {
676 case NFS4_OPEN_CLAIM_NULL:
677 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
678 READ_BUF(4);
679 READ32(open->op_fname.len);
680 READ_BUF(open->op_fname.len);
681 SAVEMEM(open->op_fname.data, open->op_fname.len);
682 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
683 return status;
684 break;
685 case NFS4_OPEN_CLAIM_PREVIOUS:
686 READ_BUF(4);
687 READ32(open->op_delegate_type);
688 break;
689 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
690 READ_BUF(sizeof(stateid_t) + 4);
691 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
692 READ32(open->op_fname.len);
693 READ_BUF(open->op_fname.len);
694 SAVEMEM(open->op_fname.data, open->op_fname.len);
695 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
696 return status;
697 break;
698 default:
699 goto xdr_error;
700 }
701
702 DECODE_TAIL;
703 }
704
705 static __be32
706 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
707 {
708 DECODE_HEAD;
709
710 open_conf->oc_stateowner = NULL;
711 READ_BUF(4 + sizeof(stateid_t));
712 READ32(open_conf->oc_req_stateid.si_generation);
713 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
714 READ32(open_conf->oc_seqid);
715
716 DECODE_TAIL;
717 }
718
719 static __be32
720 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
721 {
722 DECODE_HEAD;
723
724 open_down->od_stateowner = NULL;
725 READ_BUF(12 + sizeof(stateid_t));
726 READ32(open_down->od_stateid.si_generation);
727 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
728 READ32(open_down->od_seqid);
729 READ32(open_down->od_share_access);
730 READ32(open_down->od_share_deny);
731
732 DECODE_TAIL;
733 }
734
735 static __be32
736 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
737 {
738 DECODE_HEAD;
739
740 READ_BUF(4);
741 READ32(putfh->pf_fhlen);
742 if (putfh->pf_fhlen > NFS4_FHSIZE)
743 goto xdr_error;
744 READ_BUF(putfh->pf_fhlen);
745 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
746
747 DECODE_TAIL;
748 }
749
750 static __be32
751 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
752 {
753 DECODE_HEAD;
754
755 READ_BUF(sizeof(stateid_t) + 12);
756 READ32(read->rd_stateid.si_generation);
757 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
758 READ64(read->rd_offset);
759 READ32(read->rd_length);
760
761 DECODE_TAIL;
762 }
763
764 static __be32
765 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
766 {
767 DECODE_HEAD;
768
769 READ_BUF(24);
770 READ64(readdir->rd_cookie);
771 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
772 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
773 READ32(readdir->rd_maxcount);
774 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
775 goto out;
776
777 DECODE_TAIL;
778 }
779
780 static __be32
781 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
782 {
783 DECODE_HEAD;
784
785 READ_BUF(4);
786 READ32(remove->rm_namelen);
787 READ_BUF(remove->rm_namelen);
788 SAVEMEM(remove->rm_name, remove->rm_namelen);
789 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
790 return status;
791
792 DECODE_TAIL;
793 }
794
795 static __be32
796 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
797 {
798 DECODE_HEAD;
799
800 READ_BUF(4);
801 READ32(rename->rn_snamelen);
802 READ_BUF(rename->rn_snamelen + 4);
803 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
804 READ32(rename->rn_tnamelen);
805 READ_BUF(rename->rn_tnamelen);
806 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
807 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
808 return status;
809 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
810 return status;
811
812 DECODE_TAIL;
813 }
814
815 static __be32
816 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
817 {
818 DECODE_HEAD;
819
820 READ_BUF(sizeof(clientid_t));
821 COPYMEM(clientid, sizeof(clientid_t));
822
823 DECODE_TAIL;
824 }
825
826 static __be32
827 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
828 struct nfsd4_secinfo *secinfo)
829 {
830 DECODE_HEAD;
831
832 READ_BUF(4);
833 READ32(secinfo->si_namelen);
834 READ_BUF(secinfo->si_namelen);
835 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
836 status = check_filename(secinfo->si_name, secinfo->si_namelen,
837 nfserr_noent);
838 if (status)
839 return status;
840 DECODE_TAIL;
841 }
842
843 static __be32
844 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
845 {
846 DECODE_HEAD;
847
848 READ_BUF(sizeof(stateid_t));
849 READ32(setattr->sa_stateid.si_generation);
850 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
851 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
852 goto out;
853
854 DECODE_TAIL;
855 }
856
857 static __be32
858 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
859 {
860 DECODE_HEAD;
861
862 READ_BUF(12);
863 COPYMEM(setclientid->se_verf.data, 8);
864 READ32(setclientid->se_namelen);
865
866 READ_BUF(setclientid->se_namelen + 8);
867 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
868 READ32(setclientid->se_callback_prog);
869 READ32(setclientid->se_callback_netid_len);
870
871 READ_BUF(setclientid->se_callback_netid_len + 4);
872 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
873 READ32(setclientid->se_callback_addr_len);
874
875 READ_BUF(setclientid->se_callback_addr_len + 4);
876 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
877 READ32(setclientid->se_callback_ident);
878
879 DECODE_TAIL;
880 }
881
882 static __be32
883 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
884 {
885 DECODE_HEAD;
886
887 READ_BUF(8 + sizeof(nfs4_verifier));
888 COPYMEM(&scd_c->sc_clientid, 8);
889 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
890
891 DECODE_TAIL;
892 }
893
894 /* Also used for NVERIFY */
895 static __be32
896 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
897 {
898 #if 0
899 struct nfsd4_compoundargs save = {
900 .p = argp->p,
901 .end = argp->end,
902 .rqstp = argp->rqstp,
903 };
904 u32 ve_bmval[2];
905 struct iattr ve_iattr; /* request */
906 struct nfs4_acl *ve_acl; /* request */
907 #endif
908 DECODE_HEAD;
909
910 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
911 goto out;
912
913 /* For convenience's sake, we compare raw xdr'd attributes in
914 * nfsd4_proc_verify; however we still decode here just to return
915 * correct error in case of bad xdr. */
916 #if 0
917 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
918 if (status == nfserr_inval) {
919 status = nfserrno(status);
920 goto out;
921 }
922 #endif
923 READ_BUF(4);
924 READ32(verify->ve_attrlen);
925 READ_BUF(verify->ve_attrlen);
926 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
927
928 DECODE_TAIL;
929 }
930
931 static __be32
932 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
933 {
934 int avail;
935 int v;
936 int len;
937 DECODE_HEAD;
938
939 READ_BUF(sizeof(stateid_opaque_t) + 20);
940 READ32(write->wr_stateid.si_generation);
941 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
942 READ64(write->wr_offset);
943 READ32(write->wr_stable_how);
944 if (write->wr_stable_how > 2)
945 goto xdr_error;
946 READ32(write->wr_buflen);
947
948 /* Sorry .. no magic macros for this.. *
949 * READ_BUF(write->wr_buflen);
950 * SAVEMEM(write->wr_buf, write->wr_buflen);
951 */
952 avail = (char*)argp->end - (char*)argp->p;
953 if (avail + argp->pagelen < write->wr_buflen) {
954 dprintk("NFSD: xdr error (%s:%d)\n",
955 __FILE__, __LINE__);
956 goto xdr_error;
957 }
958 argp->rqstp->rq_vec[0].iov_base = p;
959 argp->rqstp->rq_vec[0].iov_len = avail;
960 v = 0;
961 len = write->wr_buflen;
962 while (len > argp->rqstp->rq_vec[v].iov_len) {
963 len -= argp->rqstp->rq_vec[v].iov_len;
964 v++;
965 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
966 argp->pagelist++;
967 if (argp->pagelen >= PAGE_SIZE) {
968 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
969 argp->pagelen -= PAGE_SIZE;
970 } else {
971 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
972 argp->pagelen -= len;
973 }
974 }
975 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
976 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
977 argp->rqstp->rq_vec[v].iov_len = len;
978 write->wr_vlen = v+1;
979
980 DECODE_TAIL;
981 }
982
983 static __be32
984 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
985 {
986 DECODE_HEAD;
987
988 READ_BUF(12);
989 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
990 READ32(rlockowner->rl_owner.len);
991 READ_BUF(rlockowner->rl_owner.len);
992 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
993
994 DECODE_TAIL;
995 }
996
997 static __be32
998 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
999 {
1000 DECODE_HEAD;
1001 struct nfsd4_op *op;
1002 int i;
1003
1004 /*
1005 * XXX: According to spec, we should check the tag
1006 * for UTF-8 compliance. I'm postponing this for
1007 * now because it seems that some clients do use
1008 * binary tags.
1009 */
1010 READ_BUF(4);
1011 READ32(argp->taglen);
1012 READ_BUF(argp->taglen + 8);
1013 SAVEMEM(argp->tag, argp->taglen);
1014 READ32(argp->minorversion);
1015 READ32(argp->opcnt);
1016
1017 if (argp->taglen > NFSD4_MAX_TAGLEN)
1018 goto xdr_error;
1019 if (argp->opcnt > 100)
1020 goto xdr_error;
1021
1022 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1023 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1024 if (!argp->ops) {
1025 argp->ops = argp->iops;
1026 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1027 goto xdr_error;
1028 }
1029 }
1030
1031 for (i = 0; i < argp->opcnt; i++) {
1032 op = &argp->ops[i];
1033 op->replay = NULL;
1034
1035 /*
1036 * We can't use READ_BUF() here because we need to handle
1037 * a missing opcode as an OP_WRITE + 1. So we need to check
1038 * to see if we're truly at the end of our buffer or if there
1039 * is another page we need to flip to.
1040 */
1041
1042 if (argp->p == argp->end) {
1043 if (argp->pagelen < 4) {
1044 /* There isn't an opcode still on the wire */
1045 op->opnum = OP_WRITE + 1;
1046 op->status = nfserr_bad_xdr;
1047 argp->opcnt = i+1;
1048 break;
1049 }
1050
1051 /*
1052 * False alarm. We just hit a page boundary, but there
1053 * is still data available. Move pointer across page
1054 * boundary. *snip from READ_BUF*
1055 */
1056 argp->p = page_address(argp->pagelist[0]);
1057 argp->pagelist++;
1058 if (argp->pagelen < PAGE_SIZE) {
1059 argp->end = p + (argp->pagelen>>2);
1060 argp->pagelen = 0;
1061 } else {
1062 argp->end = p + (PAGE_SIZE>>2);
1063 argp->pagelen -= PAGE_SIZE;
1064 }
1065 }
1066 op->opnum = ntohl(*argp->p++);
1067
1068 switch (op->opnum) {
1069 case 2: /* Reserved operation */
1070 op->opnum = OP_ILLEGAL;
1071 if (argp->minorversion == 0)
1072 op->status = nfserr_op_illegal;
1073 else
1074 op->status = nfserr_minor_vers_mismatch;
1075 break;
1076 case OP_ACCESS:
1077 op->status = nfsd4_decode_access(argp, &op->u.access);
1078 break;
1079 case OP_CLOSE:
1080 op->status = nfsd4_decode_close(argp, &op->u.close);
1081 break;
1082 case OP_COMMIT:
1083 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1084 break;
1085 case OP_CREATE:
1086 op->status = nfsd4_decode_create(argp, &op->u.create);
1087 break;
1088 case OP_DELEGRETURN:
1089 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1090 break;
1091 case OP_GETATTR:
1092 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1093 break;
1094 case OP_GETFH:
1095 op->status = nfs_ok;
1096 break;
1097 case OP_LINK:
1098 op->status = nfsd4_decode_link(argp, &op->u.link);
1099 break;
1100 case OP_LOCK:
1101 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1102 break;
1103 case OP_LOCKT:
1104 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1105 break;
1106 case OP_LOCKU:
1107 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1108 break;
1109 case OP_LOOKUP:
1110 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1111 break;
1112 case OP_LOOKUPP:
1113 op->status = nfs_ok;
1114 break;
1115 case OP_NVERIFY:
1116 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1117 break;
1118 case OP_OPEN:
1119 op->status = nfsd4_decode_open(argp, &op->u.open);
1120 break;
1121 case OP_OPEN_CONFIRM:
1122 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1123 break;
1124 case OP_OPEN_DOWNGRADE:
1125 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1126 break;
1127 case OP_PUTFH:
1128 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1129 break;
1130 case OP_PUTROOTFH:
1131 op->status = nfs_ok;
1132 break;
1133 case OP_READ:
1134 op->status = nfsd4_decode_read(argp, &op->u.read);
1135 break;
1136 case OP_READDIR:
1137 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1138 break;
1139 case OP_READLINK:
1140 op->status = nfs_ok;
1141 break;
1142 case OP_REMOVE:
1143 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1144 break;
1145 case OP_RENAME:
1146 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1147 break;
1148 case OP_RESTOREFH:
1149 op->status = nfs_ok;
1150 break;
1151 case OP_RENEW:
1152 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1153 break;
1154 case OP_SAVEFH:
1155 op->status = nfs_ok;
1156 break;
1157 case OP_SECINFO:
1158 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo);
1159 break;
1160 case OP_SETATTR:
1161 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1162 break;
1163 case OP_SETCLIENTID:
1164 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1165 break;
1166 case OP_SETCLIENTID_CONFIRM:
1167 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1168 break;
1169 case OP_VERIFY:
1170 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1171 break;
1172 case OP_WRITE:
1173 op->status = nfsd4_decode_write(argp, &op->u.write);
1174 break;
1175 case OP_RELEASE_LOCKOWNER:
1176 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1177 break;
1178 default:
1179 op->opnum = OP_ILLEGAL;
1180 op->status = nfserr_op_illegal;
1181 break;
1182 }
1183
1184 if (op->status) {
1185 argp->opcnt = i+1;
1186 break;
1187 }
1188 }
1189
1190 DECODE_TAIL;
1191 }
1192 /*
1193 * END OF "GENERIC" DECODE ROUTINES.
1194 */
1195
1196 /*
1197 * START OF "GENERIC" ENCODE ROUTINES.
1198 * These may look a little ugly since they are imported from a "generic"
1199 * set of XDR encode/decode routines which are intended to be shared by
1200 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1201 *
1202 * If the pain of reading these is too great, it should be a straightforward
1203 * task to translate them into Linux-specific versions which are more
1204 * consistent with the style used in NFSv2/v3...
1205 */
1206 #define ENCODE_HEAD __be32 *p
1207
1208 #define WRITE32(n) *p++ = htonl(n)
1209 #define WRITE64(n) do { \
1210 *p++ = htonl((u32)((n) >> 32)); \
1211 *p++ = htonl((u32)(n)); \
1212 } while (0)
1213 #define WRITEMEM(ptr,nbytes) do { \
1214 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1215 memcpy(p, ptr, nbytes); \
1216 p += XDR_QUADLEN(nbytes); \
1217 } while (0)
1218 #define WRITECINFO(c) do { \
1219 *p++ = htonl(c.atomic); \
1220 *p++ = htonl(c.before_ctime_sec); \
1221 *p++ = htonl(c.before_ctime_nsec); \
1222 *p++ = htonl(c.after_ctime_sec); \
1223 *p++ = htonl(c.after_ctime_nsec); \
1224 } while (0)
1225
1226 #define RESERVE_SPACE(nbytes) do { \
1227 p = resp->p; \
1228 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1229 } while (0)
1230 #define ADJUST_ARGS() resp->p = p
1231
1232 /*
1233 * Header routine to setup seqid operation replay cache
1234 */
1235 #define ENCODE_SEQID_OP_HEAD \
1236 __be32 *p; \
1237 __be32 *save; \
1238 \
1239 save = resp->p;
1240
1241 /*
1242 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1243 * is where sequence id's are incremented, and the replay cache is filled.
1244 * Note that we increment sequence id's here, at the last moment, so we're sure
1245 * we know whether the error to be returned is a sequence id mutating error.
1246 */
1247
1248 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1249 if (seqid_mutating_err(nfserr) && stateowner) { \
1250 stateowner->so_seqid++; \
1251 stateowner->so_replay.rp_status = nfserr; \
1252 stateowner->so_replay.rp_buflen = \
1253 (((char *)(resp)->p - (char *)save)); \
1254 memcpy(stateowner->so_replay.rp_buf, save, \
1255 stateowner->so_replay.rp_buflen); \
1256 } } while (0);
1257
1258 /* Encode as an array of strings the string given with components
1259 * seperated @sep.
1260 */
1261 static __be32 nfsd4_encode_components(char sep, char *components,
1262 __be32 **pp, int *buflen)
1263 {
1264 __be32 *p = *pp;
1265 __be32 *countp = p;
1266 int strlen, count=0;
1267 char *str, *end;
1268
1269 dprintk("nfsd4_encode_components(%s)\n", components);
1270 if ((*buflen -= 4) < 0)
1271 return nfserr_resource;
1272 WRITE32(0); /* We will fill this in with @count later */
1273 end = str = components;
1274 while (*end) {
1275 for (; *end && (*end != sep); end++)
1276 ; /* Point to end of component */
1277 strlen = end - str;
1278 if (strlen) {
1279 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1280 return nfserr_resource;
1281 WRITE32(strlen);
1282 WRITEMEM(str, strlen);
1283 count++;
1284 }
1285 else
1286 end++;
1287 str = end;
1288 }
1289 *pp = p;
1290 p = countp;
1291 WRITE32(count);
1292 return 0;
1293 }
1294
1295 /*
1296 * encode a location element of a fs_locations structure
1297 */
1298 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1299 __be32 **pp, int *buflen)
1300 {
1301 __be32 status;
1302 __be32 *p = *pp;
1303
1304 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1305 if (status)
1306 return status;
1307 status = nfsd4_encode_components('/', location->path, &p, buflen);
1308 if (status)
1309 return status;
1310 *pp = p;
1311 return 0;
1312 }
1313
1314 /*
1315 * Return the path to an export point in the pseudo filesystem namespace
1316 * Returned string is safe to use as long as the caller holds a reference
1317 * to @exp.
1318 */
1319 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1320 {
1321 struct svc_fh tmp_fh;
1322 char *path, *rootpath;
1323
1324 fh_init(&tmp_fh, NFS4_FHSIZE);
1325 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1326 if (*stat)
1327 return NULL;
1328 rootpath = tmp_fh.fh_export->ex_path;
1329
1330 path = exp->ex_path;
1331
1332 if (strncmp(path, rootpath, strlen(rootpath))) {
1333 dprintk("nfsd: fs_locations failed;"
1334 "%s is not contained in %s\n", path, rootpath);
1335 *stat = nfserr_notsupp;
1336 return NULL;
1337 }
1338
1339 return path + strlen(rootpath);
1340 }
1341
1342 /*
1343 * encode a fs_locations structure
1344 */
1345 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1346 struct svc_export *exp,
1347 __be32 **pp, int *buflen)
1348 {
1349 __be32 status;
1350 int i;
1351 __be32 *p = *pp;
1352 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1353 char *root = nfsd4_path(rqstp, exp, &status);
1354
1355 if (status)
1356 return status;
1357 status = nfsd4_encode_components('/', root, &p, buflen);
1358 if (status)
1359 return status;
1360 if ((*buflen -= 4) < 0)
1361 return nfserr_resource;
1362 WRITE32(fslocs->locations_count);
1363 for (i=0; i<fslocs->locations_count; i++) {
1364 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1365 &p, buflen);
1366 if (status)
1367 return status;
1368 }
1369 *pp = p;
1370 return 0;
1371 }
1372
1373 static u32 nfs4_ftypes[16] = {
1374 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1375 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1376 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1377 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1378 };
1379
1380 static __be32
1381 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1382 __be32 **p, int *buflen)
1383 {
1384 int status;
1385
1386 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1387 return nfserr_resource;
1388 if (whotype != NFS4_ACL_WHO_NAMED)
1389 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1390 else if (group)
1391 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1392 else
1393 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1394 if (status < 0)
1395 return nfserrno(status);
1396 *p = xdr_encode_opaque(*p, NULL, status);
1397 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1398 BUG_ON(*buflen < 0);
1399 return 0;
1400 }
1401
1402 static inline __be32
1403 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1404 {
1405 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1406 }
1407
1408 static inline __be32
1409 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1410 {
1411 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1412 }
1413
1414 static inline __be32
1415 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1416 __be32 **p, int *buflen)
1417 {
1418 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1419 }
1420
1421 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1422 FATTR4_WORD0_RDATTR_ERROR)
1423 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1424
1425 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1426 {
1427 /* As per referral draft: */
1428 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1429 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1430 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1431 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1432 *rdattr_err = NFSERR_MOVED;
1433 else
1434 return nfserr_moved;
1435 }
1436 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1437 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1438 return 0;
1439 }
1440
1441 /*
1442 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1443 * ourselves.
1444 *
1445 * @countp is the buffer size in _words_; upon successful return this becomes
1446 * replaced with the number of words written.
1447 */
1448 __be32
1449 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1450 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1451 struct svc_rqst *rqstp)
1452 {
1453 u32 bmval0 = bmval[0];
1454 u32 bmval1 = bmval[1];
1455 struct kstat stat;
1456 struct svc_fh tempfh;
1457 struct kstatfs statfs;
1458 int buflen = *countp << 2;
1459 __be32 *attrlenp;
1460 u32 dummy;
1461 u64 dummy64;
1462 u32 rdattr_err = 0;
1463 __be32 *p = buffer;
1464 __be32 status;
1465 int err;
1466 int aclsupport = 0;
1467 struct nfs4_acl *acl = NULL;
1468
1469 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1470 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1471 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1472
1473 if (exp->ex_fslocs.migrated) {
1474 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1475 if (status)
1476 goto out;
1477 }
1478
1479 err = vfs_getattr(exp->ex_mnt, dentry, &stat);
1480 if (err)
1481 goto out_nfserr;
1482 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1483 FATTR4_WORD0_MAXNAME)) ||
1484 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1485 FATTR4_WORD1_SPACE_TOTAL))) {
1486 err = vfs_statfs(dentry, &statfs);
1487 if (err)
1488 goto out_nfserr;
1489 }
1490 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1491 fh_init(&tempfh, NFS4_FHSIZE);
1492 status = fh_compose(&tempfh, exp, dentry, NULL);
1493 if (status)
1494 goto out;
1495 fhp = &tempfh;
1496 }
1497 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1498 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1499 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1500 aclsupport = (err == 0);
1501 if (bmval0 & FATTR4_WORD0_ACL) {
1502 if (err == -EOPNOTSUPP)
1503 bmval0 &= ~FATTR4_WORD0_ACL;
1504 else if (err == -EINVAL) {
1505 status = nfserr_attrnotsupp;
1506 goto out;
1507 } else if (err != 0)
1508 goto out_nfserr;
1509 }
1510 }
1511 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1512 if (exp->ex_fslocs.locations == NULL) {
1513 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1514 }
1515 }
1516 if ((buflen -= 16) < 0)
1517 goto out_resource;
1518
1519 WRITE32(2);
1520 WRITE32(bmval0);
1521 WRITE32(bmval1);
1522 attrlenp = p++; /* to be backfilled later */
1523
1524 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1525 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1526 if ((buflen -= 12) < 0)
1527 goto out_resource;
1528 if (!aclsupport)
1529 word0 &= ~FATTR4_WORD0_ACL;
1530 if (!exp->ex_fslocs.locations)
1531 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1532 WRITE32(2);
1533 WRITE32(word0);
1534 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1535 }
1536 if (bmval0 & FATTR4_WORD0_TYPE) {
1537 if ((buflen -= 4) < 0)
1538 goto out_resource;
1539 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1540 if (dummy == NF4BAD)
1541 goto out_serverfault;
1542 WRITE32(dummy);
1543 }
1544 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1545 if ((buflen -= 4) < 0)
1546 goto out_resource;
1547 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1548 WRITE32(NFS4_FH_PERSISTENT);
1549 else
1550 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1551 }
1552 if (bmval0 & FATTR4_WORD0_CHANGE) {
1553 /*
1554 * Note: This _must_ be consistent with the scheme for writing
1555 * change_info, so any changes made here must be reflected there
1556 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1557 * macro above.)
1558 */
1559 if ((buflen -= 8) < 0)
1560 goto out_resource;
1561 WRITE32(stat.ctime.tv_sec);
1562 WRITE32(stat.ctime.tv_nsec);
1563 }
1564 if (bmval0 & FATTR4_WORD0_SIZE) {
1565 if ((buflen -= 8) < 0)
1566 goto out_resource;
1567 WRITE64(stat.size);
1568 }
1569 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1570 if ((buflen -= 4) < 0)
1571 goto out_resource;
1572 WRITE32(1);
1573 }
1574 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1575 if ((buflen -= 4) < 0)
1576 goto out_resource;
1577 WRITE32(1);
1578 }
1579 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1580 if ((buflen -= 4) < 0)
1581 goto out_resource;
1582 WRITE32(0);
1583 }
1584 if (bmval0 & FATTR4_WORD0_FSID) {
1585 if ((buflen -= 16) < 0)
1586 goto out_resource;
1587 if (exp->ex_fslocs.migrated) {
1588 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1589 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1590 } else switch(fsid_source(fhp)) {
1591 case FSIDSOURCE_FSID:
1592 WRITE64((u64)exp->ex_fsid);
1593 WRITE64((u64)0);
1594 break;
1595 case FSIDSOURCE_DEV:
1596 WRITE32(0);
1597 WRITE32(MAJOR(stat.dev));
1598 WRITE32(0);
1599 WRITE32(MINOR(stat.dev));
1600 break;
1601 case FSIDSOURCE_UUID:
1602 WRITEMEM(exp->ex_uuid, 16);
1603 break;
1604 }
1605 }
1606 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1607 if ((buflen -= 4) < 0)
1608 goto out_resource;
1609 WRITE32(0);
1610 }
1611 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1612 if ((buflen -= 4) < 0)
1613 goto out_resource;
1614 WRITE32(NFSD_LEASE_TIME);
1615 }
1616 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1617 if ((buflen -= 4) < 0)
1618 goto out_resource;
1619 WRITE32(rdattr_err);
1620 }
1621 if (bmval0 & FATTR4_WORD0_ACL) {
1622 struct nfs4_ace *ace;
1623
1624 if (acl == NULL) {
1625 if ((buflen -= 4) < 0)
1626 goto out_resource;
1627
1628 WRITE32(0);
1629 goto out_acl;
1630 }
1631 if ((buflen -= 4) < 0)
1632 goto out_resource;
1633 WRITE32(acl->naces);
1634
1635 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1636 if ((buflen -= 4*3) < 0)
1637 goto out_resource;
1638 WRITE32(ace->type);
1639 WRITE32(ace->flag);
1640 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1641 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1642 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1643 &p, &buflen);
1644 if (status == nfserr_resource)
1645 goto out_resource;
1646 if (status)
1647 goto out;
1648 }
1649 }
1650 out_acl:
1651 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1652 if ((buflen -= 4) < 0)
1653 goto out_resource;
1654 WRITE32(aclsupport ?
1655 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1656 }
1657 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1658 if ((buflen -= 4) < 0)
1659 goto out_resource;
1660 WRITE32(1);
1661 }
1662 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1663 if ((buflen -= 4) < 0)
1664 goto out_resource;
1665 WRITE32(1);
1666 }
1667 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1668 if ((buflen -= 4) < 0)
1669 goto out_resource;
1670 WRITE32(1);
1671 }
1672 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1673 if ((buflen -= 4) < 0)
1674 goto out_resource;
1675 WRITE32(1);
1676 }
1677 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1678 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1679 if (buflen < 0)
1680 goto out_resource;
1681 WRITE32(fhp->fh_handle.fh_size);
1682 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1683 }
1684 if (bmval0 & FATTR4_WORD0_FILEID) {
1685 if ((buflen -= 8) < 0)
1686 goto out_resource;
1687 WRITE64(stat.ino);
1688 }
1689 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1690 if ((buflen -= 8) < 0)
1691 goto out_resource;
1692 WRITE64((u64) statfs.f_ffree);
1693 }
1694 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1695 if ((buflen -= 8) < 0)
1696 goto out_resource;
1697 WRITE64((u64) statfs.f_ffree);
1698 }
1699 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1700 if ((buflen -= 8) < 0)
1701 goto out_resource;
1702 WRITE64((u64) statfs.f_files);
1703 }
1704 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1705 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1706 if (status == nfserr_resource)
1707 goto out_resource;
1708 if (status)
1709 goto out;
1710 }
1711 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1712 if ((buflen -= 4) < 0)
1713 goto out_resource;
1714 WRITE32(1);
1715 }
1716 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1717 if ((buflen -= 8) < 0)
1718 goto out_resource;
1719 WRITE64(~(u64)0);
1720 }
1721 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1722 if ((buflen -= 4) < 0)
1723 goto out_resource;
1724 WRITE32(255);
1725 }
1726 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1727 if ((buflen -= 4) < 0)
1728 goto out_resource;
1729 WRITE32(statfs.f_namelen);
1730 }
1731 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1732 if ((buflen -= 8) < 0)
1733 goto out_resource;
1734 WRITE64((u64) svc_max_payload(rqstp));
1735 }
1736 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1737 if ((buflen -= 8) < 0)
1738 goto out_resource;
1739 WRITE64((u64) svc_max_payload(rqstp));
1740 }
1741 if (bmval1 & FATTR4_WORD1_MODE) {
1742 if ((buflen -= 4) < 0)
1743 goto out_resource;
1744 WRITE32(stat.mode & S_IALLUGO);
1745 }
1746 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1747 if ((buflen -= 4) < 0)
1748 goto out_resource;
1749 WRITE32(1);
1750 }
1751 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1752 if ((buflen -= 4) < 0)
1753 goto out_resource;
1754 WRITE32(stat.nlink);
1755 }
1756 if (bmval1 & FATTR4_WORD1_OWNER) {
1757 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1758 if (status == nfserr_resource)
1759 goto out_resource;
1760 if (status)
1761 goto out;
1762 }
1763 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1764 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1765 if (status == nfserr_resource)
1766 goto out_resource;
1767 if (status)
1768 goto out;
1769 }
1770 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1771 if ((buflen -= 8) < 0)
1772 goto out_resource;
1773 WRITE32((u32) MAJOR(stat.rdev));
1774 WRITE32((u32) MINOR(stat.rdev));
1775 }
1776 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1777 if ((buflen -= 8) < 0)
1778 goto out_resource;
1779 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1780 WRITE64(dummy64);
1781 }
1782 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1783 if ((buflen -= 8) < 0)
1784 goto out_resource;
1785 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1786 WRITE64(dummy64);
1787 }
1788 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1789 if ((buflen -= 8) < 0)
1790 goto out_resource;
1791 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1792 WRITE64(dummy64);
1793 }
1794 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1795 if ((buflen -= 8) < 0)
1796 goto out_resource;
1797 dummy64 = (u64)stat.blocks << 9;
1798 WRITE64(dummy64);
1799 }
1800 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1801 if ((buflen -= 12) < 0)
1802 goto out_resource;
1803 WRITE32(0);
1804 WRITE32(stat.atime.tv_sec);
1805 WRITE32(stat.atime.tv_nsec);
1806 }
1807 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1808 if ((buflen -= 12) < 0)
1809 goto out_resource;
1810 WRITE32(0);
1811 WRITE32(1);
1812 WRITE32(0);
1813 }
1814 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1815 if ((buflen -= 12) < 0)
1816 goto out_resource;
1817 WRITE32(0);
1818 WRITE32(stat.ctime.tv_sec);
1819 WRITE32(stat.ctime.tv_nsec);
1820 }
1821 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1822 if ((buflen -= 12) < 0)
1823 goto out_resource;
1824 WRITE32(0);
1825 WRITE32(stat.mtime.tv_sec);
1826 WRITE32(stat.mtime.tv_nsec);
1827 }
1828 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1829 if ((buflen -= 8) < 0)
1830 goto out_resource;
1831 if (exp->ex_mnt->mnt_root->d_inode == dentry->d_inode) {
1832 err = vfs_getattr(exp->ex_mnt->mnt_parent,
1833 exp->ex_mnt->mnt_mountpoint, &stat);
1834 if (err)
1835 goto out_nfserr;
1836 }
1837 WRITE64(stat.ino);
1838 }
1839 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1840 *countp = p - buffer;
1841 status = nfs_ok;
1842
1843 out:
1844 kfree(acl);
1845 if (fhp == &tempfh)
1846 fh_put(&tempfh);
1847 return status;
1848 out_nfserr:
1849 status = nfserrno(err);
1850 goto out;
1851 out_resource:
1852 *countp = 0;
1853 status = nfserr_resource;
1854 goto out;
1855 out_serverfault:
1856 status = nfserr_serverfault;
1857 goto out;
1858 }
1859
1860 static __be32
1861 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1862 const char *name, int namlen, __be32 *p, int *buflen)
1863 {
1864 struct svc_export *exp = cd->rd_fhp->fh_export;
1865 struct dentry *dentry;
1866 __be32 nfserr;
1867
1868 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1869 if (IS_ERR(dentry))
1870 return nfserrno(PTR_ERR(dentry));
1871
1872 exp_get(exp);
1873 if (d_mountpoint(dentry)) {
1874 int err;
1875
1876 /*
1877 * Why the heck aren't we just using nfsd_lookup??
1878 * Different "."/".." handling? Something else?
1879 * At least, add a comment here to explain....
1880 */
1881 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1882 if (err) {
1883 nfserr = nfserrno(err);
1884 goto out_put;
1885 }
1886 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
1887 if (nfserr)
1888 goto out_put;
1889
1890 }
1891 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1892 cd->rd_rqstp);
1893 out_put:
1894 dput(dentry);
1895 exp_put(exp);
1896 return nfserr;
1897 }
1898
1899 static __be32 *
1900 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1901 {
1902 __be32 *attrlenp;
1903
1904 if (buflen < 6)
1905 return NULL;
1906 *p++ = htonl(2);
1907 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1908 *p++ = htonl(0); /* bmval1 */
1909
1910 attrlenp = p++;
1911 *p++ = nfserr; /* no htonl */
1912 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1913 return p;
1914 }
1915
1916 static int
1917 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1918 loff_t offset, u64 ino, unsigned int d_type)
1919 {
1920 struct readdir_cd *ccd = ccdv;
1921 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1922 int buflen;
1923 __be32 *p = cd->buffer;
1924 __be32 nfserr = nfserr_toosmall;
1925
1926 /* In nfsv4, "." and ".." never make it onto the wire.. */
1927 if (name && isdotent(name, namlen)) {
1928 cd->common.err = nfs_ok;
1929 return 0;
1930 }
1931
1932 if (cd->offset)
1933 xdr_encode_hyper(cd->offset, (u64) offset);
1934
1935 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1936 if (buflen < 0)
1937 goto fail;
1938
1939 *p++ = xdr_one; /* mark entry present */
1940 cd->offset = p; /* remember pointer */
1941 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1942 p = xdr_encode_array(p, name, namlen); /* name length & name */
1943
1944 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1945 switch (nfserr) {
1946 case nfs_ok:
1947 p += buflen;
1948 break;
1949 case nfserr_resource:
1950 nfserr = nfserr_toosmall;
1951 goto fail;
1952 case nfserr_dropit:
1953 goto fail;
1954 default:
1955 /*
1956 * If the client requested the RDATTR_ERROR attribute,
1957 * we stuff the error code into this attribute
1958 * and continue. If this attribute was not requested,
1959 * then in accordance with the spec, we fail the
1960 * entire READDIR operation(!)
1961 */
1962 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1963 goto fail;
1964 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1965 if (p == NULL) {
1966 nfserr = nfserr_toosmall;
1967 goto fail;
1968 }
1969 }
1970 cd->buflen -= (p - cd->buffer);
1971 cd->buffer = p;
1972 cd->common.err = nfs_ok;
1973 return 0;
1974 fail:
1975 cd->common.err = nfserr;
1976 return -EINVAL;
1977 }
1978
1979 static void
1980 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1981 {
1982 ENCODE_HEAD;
1983
1984 if (!nfserr) {
1985 RESERVE_SPACE(8);
1986 WRITE32(access->ac_supported);
1987 WRITE32(access->ac_resp_access);
1988 ADJUST_ARGS();
1989 }
1990 }
1991
1992 static void
1993 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1994 {
1995 ENCODE_SEQID_OP_HEAD;
1996
1997 if (!nfserr) {
1998 RESERVE_SPACE(sizeof(stateid_t));
1999 WRITE32(close->cl_stateid.si_generation);
2000 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
2001 ADJUST_ARGS();
2002 }
2003 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2004 }
2005
2006
2007 static void
2008 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2009 {
2010 ENCODE_HEAD;
2011
2012 if (!nfserr) {
2013 RESERVE_SPACE(8);
2014 WRITEMEM(commit->co_verf.data, 8);
2015 ADJUST_ARGS();
2016 }
2017 }
2018
2019 static void
2020 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2021 {
2022 ENCODE_HEAD;
2023
2024 if (!nfserr) {
2025 RESERVE_SPACE(32);
2026 WRITECINFO(create->cr_cinfo);
2027 WRITE32(2);
2028 WRITE32(create->cr_bmval[0]);
2029 WRITE32(create->cr_bmval[1]);
2030 ADJUST_ARGS();
2031 }
2032 }
2033
2034 static __be32
2035 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2036 {
2037 struct svc_fh *fhp = getattr->ga_fhp;
2038 int buflen;
2039
2040 if (nfserr)
2041 return nfserr;
2042
2043 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2044 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2045 resp->p, &buflen, getattr->ga_bmval,
2046 resp->rqstp);
2047 if (!nfserr)
2048 resp->p += buflen;
2049 return nfserr;
2050 }
2051
2052 static void
2053 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
2054 {
2055 unsigned int len;
2056 ENCODE_HEAD;
2057
2058 if (!nfserr) {
2059 len = fhp->fh_handle.fh_size;
2060 RESERVE_SPACE(len + 4);
2061 WRITE32(len);
2062 WRITEMEM(&fhp->fh_handle.fh_base, len);
2063 ADJUST_ARGS();
2064 }
2065 }
2066
2067 /*
2068 * Including all fields other than the name, a LOCK4denied structure requires
2069 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2070 */
2071 static void
2072 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2073 {
2074 ENCODE_HEAD;
2075
2076 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2077 WRITE64(ld->ld_start);
2078 WRITE64(ld->ld_length);
2079 WRITE32(ld->ld_type);
2080 if (ld->ld_sop) {
2081 WRITEMEM(&ld->ld_clientid, 8);
2082 WRITE32(ld->ld_sop->so_owner.len);
2083 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2084 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2085 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2086 WRITE64((u64)0); /* clientid */
2087 WRITE32(0); /* length of owner name */
2088 }
2089 ADJUST_ARGS();
2090 }
2091
2092 static void
2093 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2094 {
2095 ENCODE_SEQID_OP_HEAD;
2096
2097 if (!nfserr) {
2098 RESERVE_SPACE(4 + sizeof(stateid_t));
2099 WRITE32(lock->lk_resp_stateid.si_generation);
2100 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2101 ADJUST_ARGS();
2102 } else if (nfserr == nfserr_denied)
2103 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2104
2105 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2106 }
2107
2108 static void
2109 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2110 {
2111 if (nfserr == nfserr_denied)
2112 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2113 }
2114
2115 static void
2116 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2117 {
2118 ENCODE_SEQID_OP_HEAD;
2119
2120 if (!nfserr) {
2121 RESERVE_SPACE(sizeof(stateid_t));
2122 WRITE32(locku->lu_stateid.si_generation);
2123 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2124 ADJUST_ARGS();
2125 }
2126
2127 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2128 }
2129
2130
2131 static void
2132 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2133 {
2134 ENCODE_HEAD;
2135
2136 if (!nfserr) {
2137 RESERVE_SPACE(20);
2138 WRITECINFO(link->li_cinfo);
2139 ADJUST_ARGS();
2140 }
2141 }
2142
2143
2144 static void
2145 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2146 {
2147 ENCODE_SEQID_OP_HEAD;
2148
2149 if (nfserr)
2150 goto out;
2151
2152 RESERVE_SPACE(36 + sizeof(stateid_t));
2153 WRITE32(open->op_stateid.si_generation);
2154 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2155 WRITECINFO(open->op_cinfo);
2156 WRITE32(open->op_rflags);
2157 WRITE32(2);
2158 WRITE32(open->op_bmval[0]);
2159 WRITE32(open->op_bmval[1]);
2160 WRITE32(open->op_delegate_type);
2161 ADJUST_ARGS();
2162
2163 switch (open->op_delegate_type) {
2164 case NFS4_OPEN_DELEGATE_NONE:
2165 break;
2166 case NFS4_OPEN_DELEGATE_READ:
2167 RESERVE_SPACE(20 + sizeof(stateid_t));
2168 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2169 WRITE32(open->op_recall);
2170
2171 /*
2172 * TODO: ACE's in delegations
2173 */
2174 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2175 WRITE32(0);
2176 WRITE32(0);
2177 WRITE32(0); /* XXX: is NULL principal ok? */
2178 ADJUST_ARGS();
2179 break;
2180 case NFS4_OPEN_DELEGATE_WRITE:
2181 RESERVE_SPACE(32 + sizeof(stateid_t));
2182 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2183 WRITE32(0);
2184
2185 /*
2186 * TODO: space_limit's in delegations
2187 */
2188 WRITE32(NFS4_LIMIT_SIZE);
2189 WRITE32(~(u32)0);
2190 WRITE32(~(u32)0);
2191
2192 /*
2193 * TODO: ACE's in delegations
2194 */
2195 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2196 WRITE32(0);
2197 WRITE32(0);
2198 WRITE32(0); /* XXX: is NULL principal ok? */
2199 ADJUST_ARGS();
2200 break;
2201 default:
2202 BUG();
2203 }
2204 /* XXX save filehandle here */
2205 out:
2206 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2207 }
2208
2209 static void
2210 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2211 {
2212 ENCODE_SEQID_OP_HEAD;
2213
2214 if (!nfserr) {
2215 RESERVE_SPACE(sizeof(stateid_t));
2216 WRITE32(oc->oc_resp_stateid.si_generation);
2217 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2218 ADJUST_ARGS();
2219 }
2220
2221 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2222 }
2223
2224 static void
2225 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2226 {
2227 ENCODE_SEQID_OP_HEAD;
2228
2229 if (!nfserr) {
2230 RESERVE_SPACE(sizeof(stateid_t));
2231 WRITE32(od->od_stateid.si_generation);
2232 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2233 ADJUST_ARGS();
2234 }
2235
2236 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2237 }
2238
2239 static __be32
2240 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2241 struct nfsd4_read *read)
2242 {
2243 u32 eof;
2244 int v, pn;
2245 unsigned long maxcount;
2246 long len;
2247 ENCODE_HEAD;
2248
2249 if (nfserr)
2250 return nfserr;
2251 if (resp->xbuf->page_len)
2252 return nfserr_resource;
2253
2254 RESERVE_SPACE(8); /* eof flag and byte count */
2255
2256 maxcount = svc_max_payload(resp->rqstp);
2257 if (maxcount > read->rd_length)
2258 maxcount = read->rd_length;
2259
2260 len = maxcount;
2261 v = 0;
2262 while (len > 0) {
2263 pn = resp->rqstp->rq_resused++;
2264 resp->rqstp->rq_vec[v].iov_base =
2265 page_address(resp->rqstp->rq_respages[pn]);
2266 resp->rqstp->rq_vec[v].iov_len =
2267 len < PAGE_SIZE ? len : PAGE_SIZE;
2268 v++;
2269 len -= PAGE_SIZE;
2270 }
2271 read->rd_vlen = v;
2272
2273 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2274 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2275 &maxcount);
2276
2277 if (nfserr == nfserr_symlink)
2278 nfserr = nfserr_inval;
2279 if (nfserr)
2280 return nfserr;
2281 eof = (read->rd_offset + maxcount >=
2282 read->rd_fhp->fh_dentry->d_inode->i_size);
2283
2284 WRITE32(eof);
2285 WRITE32(maxcount);
2286 ADJUST_ARGS();
2287 resp->xbuf->head[0].iov_len = (char*)p
2288 - (char*)resp->xbuf->head[0].iov_base;
2289 resp->xbuf->page_len = maxcount;
2290
2291 /* Use rest of head for padding and remaining ops: */
2292 resp->xbuf->tail[0].iov_base = p;
2293 resp->xbuf->tail[0].iov_len = 0;
2294 if (maxcount&3) {
2295 RESERVE_SPACE(4);
2296 WRITE32(0);
2297 resp->xbuf->tail[0].iov_base += maxcount&3;
2298 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2299 ADJUST_ARGS();
2300 }
2301 return 0;
2302 }
2303
2304 static __be32
2305 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2306 {
2307 int maxcount;
2308 char *page;
2309 ENCODE_HEAD;
2310
2311 if (nfserr)
2312 return nfserr;
2313 if (resp->xbuf->page_len)
2314 return nfserr_resource;
2315
2316 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2317
2318 maxcount = PAGE_SIZE;
2319 RESERVE_SPACE(4);
2320
2321 /*
2322 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2323 * if they would overflow the buffer. Is this kosher in NFSv4? If
2324 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2325 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2326 */
2327 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2328 if (nfserr == nfserr_isdir)
2329 return nfserr_inval;
2330 if (nfserr)
2331 return nfserr;
2332
2333 WRITE32(maxcount);
2334 ADJUST_ARGS();
2335 resp->xbuf->head[0].iov_len = (char*)p
2336 - (char*)resp->xbuf->head[0].iov_base;
2337 resp->xbuf->page_len = maxcount;
2338
2339 /* Use rest of head for padding and remaining ops: */
2340 resp->xbuf->tail[0].iov_base = p;
2341 resp->xbuf->tail[0].iov_len = 0;
2342 if (maxcount&3) {
2343 RESERVE_SPACE(4);
2344 WRITE32(0);
2345 resp->xbuf->tail[0].iov_base += maxcount&3;
2346 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2347 ADJUST_ARGS();
2348 }
2349 return 0;
2350 }
2351
2352 static __be32
2353 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2354 {
2355 int maxcount;
2356 loff_t offset;
2357 __be32 *page, *savep, *tailbase;
2358 ENCODE_HEAD;
2359
2360 if (nfserr)
2361 return nfserr;
2362 if (resp->xbuf->page_len)
2363 return nfserr_resource;
2364
2365 RESERVE_SPACE(8); /* verifier */
2366 savep = p;
2367
2368 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2369 WRITE32(0);
2370 WRITE32(0);
2371 ADJUST_ARGS();
2372 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2373 tailbase = p;
2374
2375 maxcount = PAGE_SIZE;
2376 if (maxcount > readdir->rd_maxcount)
2377 maxcount = readdir->rd_maxcount;
2378
2379 /*
2380 * Convert from bytes to words, account for the two words already
2381 * written, make sure to leave two words at the end for the next
2382 * pointer and eof field.
2383 */
2384 maxcount = (maxcount >> 2) - 4;
2385 if (maxcount < 0) {
2386 nfserr = nfserr_toosmall;
2387 goto err_no_verf;
2388 }
2389
2390 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2391 readdir->common.err = 0;
2392 readdir->buflen = maxcount;
2393 readdir->buffer = page;
2394 readdir->offset = NULL;
2395
2396 offset = readdir->rd_cookie;
2397 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2398 &offset,
2399 &readdir->common, nfsd4_encode_dirent);
2400 if (nfserr == nfs_ok &&
2401 readdir->common.err == nfserr_toosmall &&
2402 readdir->buffer == page)
2403 nfserr = nfserr_toosmall;
2404 if (nfserr == nfserr_symlink)
2405 nfserr = nfserr_notdir;
2406 if (nfserr)
2407 goto err_no_verf;
2408
2409 if (readdir->offset)
2410 xdr_encode_hyper(readdir->offset, offset);
2411
2412 p = readdir->buffer;
2413 *p++ = 0; /* no more entries */
2414 *p++ = htonl(readdir->common.err == nfserr_eof);
2415 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2416 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2417
2418 /* Use rest of head for padding and remaining ops: */
2419 resp->xbuf->tail[0].iov_base = tailbase;
2420 resp->xbuf->tail[0].iov_len = 0;
2421 resp->p = resp->xbuf->tail[0].iov_base;
2422 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2423
2424 return 0;
2425 err_no_verf:
2426 p = savep;
2427 ADJUST_ARGS();
2428 return nfserr;
2429 }
2430
2431 static void
2432 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2433 {
2434 ENCODE_HEAD;
2435
2436 if (!nfserr) {
2437 RESERVE_SPACE(20);
2438 WRITECINFO(remove->rm_cinfo);
2439 ADJUST_ARGS();
2440 }
2441 }
2442
2443 static void
2444 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2445 {
2446 ENCODE_HEAD;
2447
2448 if (!nfserr) {
2449 RESERVE_SPACE(40);
2450 WRITECINFO(rename->rn_sinfo);
2451 WRITECINFO(rename->rn_tinfo);
2452 ADJUST_ARGS();
2453 }
2454 }
2455
2456 static void
2457 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2458 struct nfsd4_secinfo *secinfo)
2459 {
2460 int i = 0;
2461 struct svc_export *exp = secinfo->si_exp;
2462 u32 nflavs;
2463 struct exp_flavor_info *flavs;
2464 struct exp_flavor_info def_flavs[2];
2465 ENCODE_HEAD;
2466
2467 if (nfserr)
2468 goto out;
2469 if (exp->ex_nflavors) {
2470 flavs = exp->ex_flavors;
2471 nflavs = exp->ex_nflavors;
2472 } else { /* Handling of some defaults in absence of real secinfo: */
2473 flavs = def_flavs;
2474 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2475 nflavs = 2;
2476 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2477 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2478 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2479 nflavs = 1;
2480 flavs[0].pseudoflavor
2481 = svcauth_gss_flavor(exp->ex_client);
2482 } else {
2483 nflavs = 1;
2484 flavs[0].pseudoflavor
2485 = exp->ex_client->flavour->flavour;
2486 }
2487 }
2488
2489 RESERVE_SPACE(4);
2490 WRITE32(nflavs);
2491 ADJUST_ARGS();
2492 for (i = 0; i < nflavs; i++) {
2493 u32 flav = flavs[i].pseudoflavor;
2494 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2495
2496 if (gm) {
2497 RESERVE_SPACE(4);
2498 WRITE32(RPC_AUTH_GSS);
2499 ADJUST_ARGS();
2500 RESERVE_SPACE(4 + gm->gm_oid.len);
2501 WRITE32(gm->gm_oid.len);
2502 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2503 ADJUST_ARGS();
2504 RESERVE_SPACE(4);
2505 WRITE32(0); /* qop */
2506 ADJUST_ARGS();
2507 RESERVE_SPACE(4);
2508 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2509 ADJUST_ARGS();
2510 gss_mech_put(gm);
2511 } else {
2512 RESERVE_SPACE(4);
2513 WRITE32(flav);
2514 ADJUST_ARGS();
2515 }
2516 }
2517 out:
2518 if (exp)
2519 exp_put(exp);
2520 }
2521
2522 /*
2523 * The SETATTR encode routine is special -- it always encodes a bitmap,
2524 * regardless of the error status.
2525 */
2526 static void
2527 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2528 {
2529 ENCODE_HEAD;
2530
2531 RESERVE_SPACE(12);
2532 if (nfserr) {
2533 WRITE32(2);
2534 WRITE32(0);
2535 WRITE32(0);
2536 }
2537 else {
2538 WRITE32(2);
2539 WRITE32(setattr->sa_bmval[0]);
2540 WRITE32(setattr->sa_bmval[1]);
2541 }
2542 ADJUST_ARGS();
2543 }
2544
2545 static void
2546 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2547 {
2548 ENCODE_HEAD;
2549
2550 if (!nfserr) {
2551 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2552 WRITEMEM(&scd->se_clientid, 8);
2553 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2554 ADJUST_ARGS();
2555 }
2556 else if (nfserr == nfserr_clid_inuse) {
2557 RESERVE_SPACE(8);
2558 WRITE32(0);
2559 WRITE32(0);
2560 ADJUST_ARGS();
2561 }
2562 }
2563
2564 static void
2565 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2566 {
2567 ENCODE_HEAD;
2568
2569 if (!nfserr) {
2570 RESERVE_SPACE(16);
2571 WRITE32(write->wr_bytes_written);
2572 WRITE32(write->wr_how_written);
2573 WRITEMEM(write->wr_verifier.data, 8);
2574 ADJUST_ARGS();
2575 }
2576 }
2577
2578 void
2579 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2580 {
2581 __be32 *statp;
2582 ENCODE_HEAD;
2583
2584 RESERVE_SPACE(8);
2585 WRITE32(op->opnum);
2586 statp = p++; /* to be backfilled at the end */
2587 ADJUST_ARGS();
2588
2589 switch (op->opnum) {
2590 case OP_ACCESS:
2591 nfsd4_encode_access(resp, op->status, &op->u.access);
2592 break;
2593 case OP_CLOSE:
2594 nfsd4_encode_close(resp, op->status, &op->u.close);
2595 break;
2596 case OP_COMMIT:
2597 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2598 break;
2599 case OP_CREATE:
2600 nfsd4_encode_create(resp, op->status, &op->u.create);
2601 break;
2602 case OP_DELEGRETURN:
2603 break;
2604 case OP_GETATTR:
2605 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2606 break;
2607 case OP_GETFH:
2608 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2609 break;
2610 case OP_LINK:
2611 nfsd4_encode_link(resp, op->status, &op->u.link);
2612 break;
2613 case OP_LOCK:
2614 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2615 break;
2616 case OP_LOCKT:
2617 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2618 break;
2619 case OP_LOCKU:
2620 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2621 break;
2622 case OP_LOOKUP:
2623 break;
2624 case OP_LOOKUPP:
2625 break;
2626 case OP_NVERIFY:
2627 break;
2628 case OP_OPEN:
2629 nfsd4_encode_open(resp, op->status, &op->u.open);
2630 break;
2631 case OP_OPEN_CONFIRM:
2632 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2633 break;
2634 case OP_OPEN_DOWNGRADE:
2635 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2636 break;
2637 case OP_PUTFH:
2638 break;
2639 case OP_PUTROOTFH:
2640 break;
2641 case OP_READ:
2642 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2643 break;
2644 case OP_READDIR:
2645 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2646 break;
2647 case OP_READLINK:
2648 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2649 break;
2650 case OP_REMOVE:
2651 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2652 break;
2653 case OP_RENAME:
2654 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2655 break;
2656 case OP_RENEW:
2657 break;
2658 case OP_RESTOREFH:
2659 break;
2660 case OP_SAVEFH:
2661 break;
2662 case OP_SECINFO:
2663 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
2664 break;
2665 case OP_SETATTR:
2666 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2667 break;
2668 case OP_SETCLIENTID:
2669 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2670 break;
2671 case OP_SETCLIENTID_CONFIRM:
2672 break;
2673 case OP_VERIFY:
2674 break;
2675 case OP_WRITE:
2676 nfsd4_encode_write(resp, op->status, &op->u.write);
2677 break;
2678 case OP_RELEASE_LOCKOWNER:
2679 break;
2680 default:
2681 break;
2682 }
2683
2684 /*
2685 * Note: We write the status directly, instead of using WRITE32(),
2686 * since it is already in network byte order.
2687 */
2688 *statp = op->status;
2689 }
2690
2691 /*
2692 * Encode the reply stored in the stateowner reply cache
2693 *
2694 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2695 * previously sent already encoded operation.
2696 *
2697 * called with nfs4_lock_state() held
2698 */
2699 void
2700 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2701 {
2702 ENCODE_HEAD;
2703 struct nfs4_replay *rp = op->replay;
2704
2705 BUG_ON(!rp);
2706
2707 RESERVE_SPACE(8);
2708 WRITE32(op->opnum);
2709 *p++ = rp->rp_status; /* already xdr'ed */
2710 ADJUST_ARGS();
2711
2712 RESERVE_SPACE(rp->rp_buflen);
2713 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2714 ADJUST_ARGS();
2715 }
2716
2717 /*
2718 * END OF "GENERIC" ENCODE ROUTINES.
2719 */
2720
2721 int
2722 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2723 {
2724 return xdr_ressize_check(rqstp, p);
2725 }
2726
2727 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2728 {
2729 if (args->ops != args->iops) {
2730 kfree(args->ops);
2731 args->ops = args->iops;
2732 }
2733 kfree(args->tmpp);
2734 args->tmpp = NULL;
2735 while (args->to_free) {
2736 struct tmpbuf *tb = args->to_free;
2737 args->to_free = tb->next;
2738 tb->release(tb->buf);
2739 kfree(tb);
2740 }
2741 }
2742
2743 int
2744 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2745 {
2746 __be32 status;
2747
2748 args->p = p;
2749 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2750 args->pagelist = rqstp->rq_arg.pages;
2751 args->pagelen = rqstp->rq_arg.page_len;
2752 args->tmpp = NULL;
2753 args->to_free = NULL;
2754 args->ops = args->iops;
2755 args->rqstp = rqstp;
2756
2757 status = nfsd4_decode_compound(args);
2758 if (status) {
2759 nfsd4_release_compoundargs(args);
2760 }
2761 return !status;
2762 }
2763
2764 int
2765 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
2766 {
2767 /*
2768 * All that remains is to write the tag and operation count...
2769 */
2770 struct kvec *iov;
2771 p = resp->tagp;
2772 *p++ = htonl(resp->taglen);
2773 memcpy(p, resp->tag, resp->taglen);
2774 p += XDR_QUADLEN(resp->taglen);
2775 *p++ = htonl(resp->opcnt);
2776
2777 if (rqstp->rq_res.page_len)
2778 iov = &rqstp->rq_res.tail[0];
2779 else
2780 iov = &rqstp->rq_res.head[0];
2781 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2782 BUG_ON(iov->iov_len > PAGE_SIZE);
2783 return 1;
2784 }
2785
2786 /*
2787 * Local variables:
2788 * c-basic-offset: 8
2789 * End:
2790 */
WRT350N Kernel Patches