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knfsd: cleanup nfsd4 properly on module init failure
[mirror_ubuntu-zesty-kernel.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Server-side XDR for NFSv4
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
43 */
44
45 #include <linux/param.h>
46 #include <linux/smp.h>
47 #include <linux/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, u32 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 unsigned 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 /*
173 * The following memcpy is safe because read_buf is always
174 * called with nbytes > avail, and the two cases above both
175 * guarantee p points to at least nbytes bytes.
176 */
177 memcpy(p, argp->p, avail);
178 /* step to next page */
179 argp->p = page_address(argp->pagelist[0]);
180 argp->pagelist++;
181 if (argp->pagelen < PAGE_SIZE) {
182 argp->end = p + (argp->pagelen>>2);
183 argp->pagelen = 0;
184 } else {
185 argp->end = p + (PAGE_SIZE>>2);
186 argp->pagelen -= PAGE_SIZE;
187 }
188 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
189 argp->p += XDR_QUADLEN(nbytes - avail);
190 return p;
191 }
192
193 static int
194 defer_free(struct nfsd4_compoundargs *argp,
195 void (*release)(const void *), void *p)
196 {
197 struct tmpbuf *tb;
198
199 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
200 if (!tb)
201 return -ENOMEM;
202 tb->buf = p;
203 tb->release = release;
204 tb->next = argp->to_free;
205 argp->to_free = tb;
206 return 0;
207 }
208
209 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
210 {
211 if (p == argp->tmp) {
212 p = kmalloc(nbytes, GFP_KERNEL);
213 if (!p)
214 return NULL;
215 memcpy(p, argp->tmp, nbytes);
216 } else {
217 BUG_ON(p != argp->tmpp);
218 argp->tmpp = NULL;
219 }
220 if (defer_free(argp, kfree, p)) {
221 kfree(p);
222 return NULL;
223 } else
224 return (char *)p;
225 }
226
227 static __be32
228 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
229 {
230 u32 bmlen;
231 DECODE_HEAD;
232
233 bmval[0] = 0;
234 bmval[1] = 0;
235
236 READ_BUF(4);
237 READ32(bmlen);
238 if (bmlen > 1000)
239 goto xdr_error;
240
241 READ_BUF(bmlen << 2);
242 if (bmlen > 0)
243 READ32(bmval[0]);
244 if (bmlen > 1)
245 READ32(bmval[1]);
246
247 DECODE_TAIL;
248 }
249
250 static __be32
251 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
252 struct nfs4_acl **acl)
253 {
254 int expected_len, len = 0;
255 u32 dummy32;
256 char *buf;
257 int host_err;
258
259 DECODE_HEAD;
260 iattr->ia_valid = 0;
261 if ((status = nfsd4_decode_bitmap(argp, bmval)))
262 return status;
263
264 /*
265 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
266 * read-only attributes return ERR_INVAL.
267 */
268 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
269 return nfserr_attrnotsupp;
270 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
271 return nfserr_inval;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
283 int nace;
284 struct nfs4_ace *ace;
285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
293 if (*acl == NULL) {
294 host_err = -ENOMEM;
295 goto out_nfserr;
296 }
297 defer_free(argp, kfree, *acl);
298
299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
301 READ_BUF(16); len += 16;
302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 host_err = 0;
311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
314 host_err = nfsd_map_name_to_gid(argp->rqstp,
315 buf, dummy32, &ace->who);
316 else
317 host_err = nfsd_map_name_to_uid(argp->rqstp,
318 buf, dummy32, &ace->who);
319 if (host_err)
320 goto out_nfserr;
321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
338 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 goto out_nfserr;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
349 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 goto out_nfserr;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
379 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
380 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
381 all 32 bits of 'nseconds'. */
382 READ_BUF(12);
383 len += 12;
384 READ32(dummy32);
385 if (dummy32)
386 return nfserr_inval;
387 READ32(iattr->ia_ctime.tv_sec);
388 READ32(iattr->ia_ctime.tv_nsec);
389 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
390 return nfserr_inval;
391 iattr->ia_valid |= ATTR_CTIME;
392 }
393 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
394 READ_BUF(4);
395 len += 4;
396 READ32(dummy32);
397 switch (dummy32) {
398 case NFS4_SET_TO_CLIENT_TIME:
399 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
400 all 32 bits of 'nseconds'. */
401 READ_BUF(12);
402 len += 12;
403 READ32(dummy32);
404 if (dummy32)
405 return nfserr_inval;
406 READ32(iattr->ia_mtime.tv_sec);
407 READ32(iattr->ia_mtime.tv_nsec);
408 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
409 return nfserr_inval;
410 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
411 break;
412 case NFS4_SET_TO_SERVER_TIME:
413 iattr->ia_valid |= ATTR_MTIME;
414 break;
415 default:
416 goto xdr_error;
417 }
418 }
419 if (len != expected_len)
420 goto xdr_error;
421
422 DECODE_TAIL;
423
424 out_nfserr:
425 status = nfserrno(host_err);
426 goto out;
427 }
428
429 static __be32
430 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
431 {
432 DECODE_HEAD;
433
434 READ_BUF(4);
435 READ32(access->ac_req_access);
436
437 DECODE_TAIL;
438 }
439
440 static __be32
441 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
442 {
443 DECODE_HEAD;
444
445 close->cl_stateowner = NULL;
446 READ_BUF(4 + sizeof(stateid_t));
447 READ32(close->cl_seqid);
448 READ32(close->cl_stateid.si_generation);
449 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452 }
453
454
455 static __be32
456 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
457 {
458 DECODE_HEAD;
459
460 READ_BUF(12);
461 READ64(commit->co_offset);
462 READ32(commit->co_count);
463
464 DECODE_TAIL;
465 }
466
467 static __be32
468 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
469 {
470 DECODE_HEAD;
471
472 READ_BUF(4);
473 READ32(create->cr_type);
474 switch (create->cr_type) {
475 case NF4LNK:
476 READ_BUF(4);
477 READ32(create->cr_linklen);
478 READ_BUF(create->cr_linklen);
479 SAVEMEM(create->cr_linkname, create->cr_linklen);
480 break;
481 case NF4BLK:
482 case NF4CHR:
483 READ_BUF(8);
484 READ32(create->cr_specdata1);
485 READ32(create->cr_specdata2);
486 break;
487 case NF4SOCK:
488 case NF4FIFO:
489 case NF4DIR:
490 default:
491 break;
492 }
493
494 READ_BUF(4);
495 READ32(create->cr_namelen);
496 READ_BUF(create->cr_namelen);
497 SAVEMEM(create->cr_name, create->cr_namelen);
498 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
499 return status;
500
501 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
502 goto out;
503
504 DECODE_TAIL;
505 }
506
507 static inline __be32
508 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
509 {
510 DECODE_HEAD;
511
512 READ_BUF(sizeof(stateid_t));
513 READ32(dr->dr_stateid.si_generation);
514 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
515
516 DECODE_TAIL;
517 }
518
519 static inline __be32
520 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
521 {
522 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
523 }
524
525 static __be32
526 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
527 {
528 DECODE_HEAD;
529
530 READ_BUF(4);
531 READ32(link->li_namelen);
532 READ_BUF(link->li_namelen);
533 SAVEMEM(link->li_name, link->li_namelen);
534 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
535 return status;
536
537 DECODE_TAIL;
538 }
539
540 static __be32
541 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
542 {
543 DECODE_HEAD;
544
545 lock->lk_replay_owner = NULL;
546 /*
547 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
548 */
549 READ_BUF(28);
550 READ32(lock->lk_type);
551 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
552 goto xdr_error;
553 READ32(lock->lk_reclaim);
554 READ64(lock->lk_offset);
555 READ64(lock->lk_length);
556 READ32(lock->lk_is_new);
557
558 if (lock->lk_is_new) {
559 READ_BUF(36);
560 READ32(lock->lk_new_open_seqid);
561 READ32(lock->lk_new_open_stateid.si_generation);
562
563 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
564 READ32(lock->lk_new_lock_seqid);
565 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
566 READ32(lock->lk_new_owner.len);
567 READ_BUF(lock->lk_new_owner.len);
568 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
569 } else {
570 READ_BUF(20);
571 READ32(lock->lk_old_lock_stateid.si_generation);
572 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
573 READ32(lock->lk_old_lock_seqid);
574 }
575
576 DECODE_TAIL;
577 }
578
579 static __be32
580 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
581 {
582 DECODE_HEAD;
583
584 READ_BUF(32);
585 READ32(lockt->lt_type);
586 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
587 goto xdr_error;
588 READ64(lockt->lt_offset);
589 READ64(lockt->lt_length);
590 COPYMEM(&lockt->lt_clientid, 8);
591 READ32(lockt->lt_owner.len);
592 READ_BUF(lockt->lt_owner.len);
593 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
594
595 DECODE_TAIL;
596 }
597
598 static __be32
599 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
600 {
601 DECODE_HEAD;
602
603 locku->lu_stateowner = NULL;
604 READ_BUF(24 + sizeof(stateid_t));
605 READ32(locku->lu_type);
606 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
607 goto xdr_error;
608 READ32(locku->lu_seqid);
609 READ32(locku->lu_stateid.si_generation);
610 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
611 READ64(locku->lu_offset);
612 READ64(locku->lu_length);
613
614 DECODE_TAIL;
615 }
616
617 static __be32
618 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
619 {
620 DECODE_HEAD;
621
622 READ_BUF(4);
623 READ32(lookup->lo_len);
624 READ_BUF(lookup->lo_len);
625 SAVEMEM(lookup->lo_name, lookup->lo_len);
626 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
627 return status;
628
629 DECODE_TAIL;
630 }
631
632 static __be32
633 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
634 {
635 DECODE_HEAD;
636
637 memset(open->op_bmval, 0, sizeof(open->op_bmval));
638 open->op_iattr.ia_valid = 0;
639 open->op_stateowner = NULL;
640
641 /* seqid, share_access, share_deny, clientid, ownerlen */
642 READ_BUF(16 + sizeof(clientid_t));
643 READ32(open->op_seqid);
644 READ32(open->op_share_access);
645 READ32(open->op_share_deny);
646 COPYMEM(&open->op_clientid, sizeof(clientid_t));
647 READ32(open->op_owner.len);
648
649 /* owner, open_flag */
650 READ_BUF(open->op_owner.len + 4);
651 SAVEMEM(open->op_owner.data, open->op_owner.len);
652 READ32(open->op_create);
653 switch (open->op_create) {
654 case NFS4_OPEN_NOCREATE:
655 break;
656 case NFS4_OPEN_CREATE:
657 READ_BUF(4);
658 READ32(open->op_createmode);
659 switch (open->op_createmode) {
660 case NFS4_CREATE_UNCHECKED:
661 case NFS4_CREATE_GUARDED:
662 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
663 goto out;
664 break;
665 case NFS4_CREATE_EXCLUSIVE:
666 READ_BUF(8);
667 COPYMEM(open->op_verf.data, 8);
668 break;
669 default:
670 goto xdr_error;
671 }
672 break;
673 default:
674 goto xdr_error;
675 }
676
677 /* open_claim */
678 READ_BUF(4);
679 READ32(open->op_claim_type);
680 switch (open->op_claim_type) {
681 case NFS4_OPEN_CLAIM_NULL:
682 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
683 READ_BUF(4);
684 READ32(open->op_fname.len);
685 READ_BUF(open->op_fname.len);
686 SAVEMEM(open->op_fname.data, open->op_fname.len);
687 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
688 return status;
689 break;
690 case NFS4_OPEN_CLAIM_PREVIOUS:
691 READ_BUF(4);
692 READ32(open->op_delegate_type);
693 break;
694 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
695 READ_BUF(sizeof(stateid_t) + 4);
696 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
697 READ32(open->op_fname.len);
698 READ_BUF(open->op_fname.len);
699 SAVEMEM(open->op_fname.data, open->op_fname.len);
700 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
701 return status;
702 break;
703 default:
704 goto xdr_error;
705 }
706
707 DECODE_TAIL;
708 }
709
710 static __be32
711 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
712 {
713 DECODE_HEAD;
714
715 open_conf->oc_stateowner = NULL;
716 READ_BUF(4 + sizeof(stateid_t));
717 READ32(open_conf->oc_req_stateid.si_generation);
718 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
719 READ32(open_conf->oc_seqid);
720
721 DECODE_TAIL;
722 }
723
724 static __be32
725 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
726 {
727 DECODE_HEAD;
728
729 open_down->od_stateowner = NULL;
730 READ_BUF(12 + sizeof(stateid_t));
731 READ32(open_down->od_stateid.si_generation);
732 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
733 READ32(open_down->od_seqid);
734 READ32(open_down->od_share_access);
735 READ32(open_down->od_share_deny);
736
737 DECODE_TAIL;
738 }
739
740 static __be32
741 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
742 {
743 DECODE_HEAD;
744
745 READ_BUF(4);
746 READ32(putfh->pf_fhlen);
747 if (putfh->pf_fhlen > NFS4_FHSIZE)
748 goto xdr_error;
749 READ_BUF(putfh->pf_fhlen);
750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
751
752 DECODE_TAIL;
753 }
754
755 static __be32
756 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
757 {
758 DECODE_HEAD;
759
760 READ_BUF(sizeof(stateid_t) + 12);
761 READ32(read->rd_stateid.si_generation);
762 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
763 READ64(read->rd_offset);
764 READ32(read->rd_length);
765
766 DECODE_TAIL;
767 }
768
769 static __be32
770 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
771 {
772 DECODE_HEAD;
773
774 READ_BUF(24);
775 READ64(readdir->rd_cookie);
776 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
777 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
778 READ32(readdir->rd_maxcount);
779 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
780 goto out;
781
782 DECODE_TAIL;
783 }
784
785 static __be32
786 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
787 {
788 DECODE_HEAD;
789
790 READ_BUF(4);
791 READ32(remove->rm_namelen);
792 READ_BUF(remove->rm_namelen);
793 SAVEMEM(remove->rm_name, remove->rm_namelen);
794 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
795 return status;
796
797 DECODE_TAIL;
798 }
799
800 static __be32
801 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
802 {
803 DECODE_HEAD;
804
805 READ_BUF(4);
806 READ32(rename->rn_snamelen);
807 READ_BUF(rename->rn_snamelen + 4);
808 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
809 READ32(rename->rn_tnamelen);
810 READ_BUF(rename->rn_tnamelen);
811 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
812 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
813 return status;
814 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
815 return status;
816
817 DECODE_TAIL;
818 }
819
820 static __be32
821 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
822 {
823 DECODE_HEAD;
824
825 READ_BUF(sizeof(clientid_t));
826 COPYMEM(clientid, sizeof(clientid_t));
827
828 DECODE_TAIL;
829 }
830
831 static __be32
832 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
833 struct nfsd4_secinfo *secinfo)
834 {
835 DECODE_HEAD;
836
837 READ_BUF(4);
838 READ32(secinfo->si_namelen);
839 READ_BUF(secinfo->si_namelen);
840 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
841 status = check_filename(secinfo->si_name, secinfo->si_namelen,
842 nfserr_noent);
843 if (status)
844 return status;
845 DECODE_TAIL;
846 }
847
848 static __be32
849 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
850 {
851 DECODE_HEAD;
852
853 READ_BUF(sizeof(stateid_t));
854 READ32(setattr->sa_stateid.si_generation);
855 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
856 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
857 goto out;
858
859 DECODE_TAIL;
860 }
861
862 static __be32
863 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
864 {
865 DECODE_HEAD;
866
867 READ_BUF(12);
868 COPYMEM(setclientid->se_verf.data, 8);
869 READ32(setclientid->se_namelen);
870
871 READ_BUF(setclientid->se_namelen + 8);
872 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
873 READ32(setclientid->se_callback_prog);
874 READ32(setclientid->se_callback_netid_len);
875
876 READ_BUF(setclientid->se_callback_netid_len + 4);
877 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
878 READ32(setclientid->se_callback_addr_len);
879
880 READ_BUF(setclientid->se_callback_addr_len + 4);
881 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
882 READ32(setclientid->se_callback_ident);
883
884 DECODE_TAIL;
885 }
886
887 static __be32
888 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
889 {
890 DECODE_HEAD;
891
892 READ_BUF(8 + sizeof(nfs4_verifier));
893 COPYMEM(&scd_c->sc_clientid, 8);
894 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
895
896 DECODE_TAIL;
897 }
898
899 /* Also used for NVERIFY */
900 static __be32
901 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
902 {
903 #if 0
904 struct nfsd4_compoundargs save = {
905 .p = argp->p,
906 .end = argp->end,
907 .rqstp = argp->rqstp,
908 };
909 u32 ve_bmval[2];
910 struct iattr ve_iattr; /* request */
911 struct nfs4_acl *ve_acl; /* request */
912 #endif
913 DECODE_HEAD;
914
915 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
916 goto out;
917
918 /* For convenience's sake, we compare raw xdr'd attributes in
919 * nfsd4_proc_verify; however we still decode here just to return
920 * correct error in case of bad xdr. */
921 #if 0
922 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
923 if (status == nfserr_inval) {
924 status = nfserrno(status);
925 goto out;
926 }
927 #endif
928 READ_BUF(4);
929 READ32(verify->ve_attrlen);
930 READ_BUF(verify->ve_attrlen);
931 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
932
933 DECODE_TAIL;
934 }
935
936 static __be32
937 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
938 {
939 int avail;
940 int v;
941 int len;
942 DECODE_HEAD;
943
944 READ_BUF(sizeof(stateid_opaque_t) + 20);
945 READ32(write->wr_stateid.si_generation);
946 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
947 READ64(write->wr_offset);
948 READ32(write->wr_stable_how);
949 if (write->wr_stable_how > 2)
950 goto xdr_error;
951 READ32(write->wr_buflen);
952
953 /* Sorry .. no magic macros for this.. *
954 * READ_BUF(write->wr_buflen);
955 * SAVEMEM(write->wr_buf, write->wr_buflen);
956 */
957 avail = (char*)argp->end - (char*)argp->p;
958 if (avail + argp->pagelen < write->wr_buflen) {
959 dprintk("NFSD: xdr error (%s:%d)\n",
960 __FILE__, __LINE__);
961 goto xdr_error;
962 }
963 argp->rqstp->rq_vec[0].iov_base = p;
964 argp->rqstp->rq_vec[0].iov_len = avail;
965 v = 0;
966 len = write->wr_buflen;
967 while (len > argp->rqstp->rq_vec[v].iov_len) {
968 len -= argp->rqstp->rq_vec[v].iov_len;
969 v++;
970 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
971 argp->pagelist++;
972 if (argp->pagelen >= PAGE_SIZE) {
973 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
974 argp->pagelen -= PAGE_SIZE;
975 } else {
976 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
977 argp->pagelen -= len;
978 }
979 }
980 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
981 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
982 argp->rqstp->rq_vec[v].iov_len = len;
983 write->wr_vlen = v+1;
984
985 DECODE_TAIL;
986 }
987
988 static __be32
989 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
990 {
991 DECODE_HEAD;
992
993 READ_BUF(12);
994 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
995 READ32(rlockowner->rl_owner.len);
996 READ_BUF(rlockowner->rl_owner.len);
997 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
998
999 DECODE_TAIL;
1000 }
1001
1002 static __be32
1003 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1004 {
1005 DECODE_HEAD;
1006 struct nfsd4_op *op;
1007 int i;
1008
1009 /*
1010 * XXX: According to spec, we should check the tag
1011 * for UTF-8 compliance. I'm postponing this for
1012 * now because it seems that some clients do use
1013 * binary tags.
1014 */
1015 READ_BUF(4);
1016 READ32(argp->taglen);
1017 READ_BUF(argp->taglen + 8);
1018 SAVEMEM(argp->tag, argp->taglen);
1019 READ32(argp->minorversion);
1020 READ32(argp->opcnt);
1021
1022 if (argp->taglen > NFSD4_MAX_TAGLEN)
1023 goto xdr_error;
1024 if (argp->opcnt > 100)
1025 goto xdr_error;
1026
1027 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1028 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1029 if (!argp->ops) {
1030 argp->ops = argp->iops;
1031 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1032 goto xdr_error;
1033 }
1034 }
1035
1036 for (i = 0; i < argp->opcnt; i++) {
1037 op = &argp->ops[i];
1038 op->replay = NULL;
1039
1040 /*
1041 * We can't use READ_BUF() here because we need to handle
1042 * a missing opcode as an OP_WRITE + 1. So we need to check
1043 * to see if we're truly at the end of our buffer or if there
1044 * is another page we need to flip to.
1045 */
1046
1047 if (argp->p == argp->end) {
1048 if (argp->pagelen < 4) {
1049 /* There isn't an opcode still on the wire */
1050 op->opnum = OP_WRITE + 1;
1051 op->status = nfserr_bad_xdr;
1052 argp->opcnt = i+1;
1053 break;
1054 }
1055
1056 /*
1057 * False alarm. We just hit a page boundary, but there
1058 * is still data available. Move pointer across page
1059 * boundary. *snip from READ_BUF*
1060 */
1061 argp->p = page_address(argp->pagelist[0]);
1062 argp->pagelist++;
1063 if (argp->pagelen < PAGE_SIZE) {
1064 argp->end = p + (argp->pagelen>>2);
1065 argp->pagelen = 0;
1066 } else {
1067 argp->end = p + (PAGE_SIZE>>2);
1068 argp->pagelen -= PAGE_SIZE;
1069 }
1070 }
1071 op->opnum = ntohl(*argp->p++);
1072
1073 switch (op->opnum) {
1074 case 2: /* Reserved operation */
1075 op->opnum = OP_ILLEGAL;
1076 if (argp->minorversion == 0)
1077 op->status = nfserr_op_illegal;
1078 else
1079 op->status = nfserr_minor_vers_mismatch;
1080 break;
1081 case OP_ACCESS:
1082 op->status = nfsd4_decode_access(argp, &op->u.access);
1083 break;
1084 case OP_CLOSE:
1085 op->status = nfsd4_decode_close(argp, &op->u.close);
1086 break;
1087 case OP_COMMIT:
1088 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1089 break;
1090 case OP_CREATE:
1091 op->status = nfsd4_decode_create(argp, &op->u.create);
1092 break;
1093 case OP_DELEGRETURN:
1094 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1095 break;
1096 case OP_GETATTR:
1097 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1098 break;
1099 case OP_GETFH:
1100 op->status = nfs_ok;
1101 break;
1102 case OP_LINK:
1103 op->status = nfsd4_decode_link(argp, &op->u.link);
1104 break;
1105 case OP_LOCK:
1106 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1107 break;
1108 case OP_LOCKT:
1109 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1110 break;
1111 case OP_LOCKU:
1112 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1113 break;
1114 case OP_LOOKUP:
1115 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1116 break;
1117 case OP_LOOKUPP:
1118 op->status = nfs_ok;
1119 break;
1120 case OP_NVERIFY:
1121 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1122 break;
1123 case OP_OPEN:
1124 op->status = nfsd4_decode_open(argp, &op->u.open);
1125 break;
1126 case OP_OPEN_CONFIRM:
1127 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1128 break;
1129 case OP_OPEN_DOWNGRADE:
1130 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1131 break;
1132 case OP_PUTFH:
1133 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1134 break;
1135 case OP_PUTROOTFH:
1136 op->status = nfs_ok;
1137 break;
1138 case OP_READ:
1139 op->status = nfsd4_decode_read(argp, &op->u.read);
1140 break;
1141 case OP_READDIR:
1142 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1143 break;
1144 case OP_READLINK:
1145 op->status = nfs_ok;
1146 break;
1147 case OP_REMOVE:
1148 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1149 break;
1150 case OP_RENAME:
1151 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1152 break;
1153 case OP_RESTOREFH:
1154 op->status = nfs_ok;
1155 break;
1156 case OP_RENEW:
1157 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1158 break;
1159 case OP_SAVEFH:
1160 op->status = nfs_ok;
1161 break;
1162 case OP_SECINFO:
1163 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo);
1164 break;
1165 case OP_SETATTR:
1166 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1167 break;
1168 case OP_SETCLIENTID:
1169 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1170 break;
1171 case OP_SETCLIENTID_CONFIRM:
1172 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1173 break;
1174 case OP_VERIFY:
1175 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1176 break;
1177 case OP_WRITE:
1178 op->status = nfsd4_decode_write(argp, &op->u.write);
1179 break;
1180 case OP_RELEASE_LOCKOWNER:
1181 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1182 break;
1183 default:
1184 op->opnum = OP_ILLEGAL;
1185 op->status = nfserr_op_illegal;
1186 break;
1187 }
1188
1189 if (op->status) {
1190 argp->opcnt = i+1;
1191 break;
1192 }
1193 }
1194
1195 DECODE_TAIL;
1196 }
1197 /*
1198 * END OF "GENERIC" DECODE ROUTINES.
1199 */
1200
1201 /*
1202 * START OF "GENERIC" ENCODE ROUTINES.
1203 * These may look a little ugly since they are imported from a "generic"
1204 * set of XDR encode/decode routines which are intended to be shared by
1205 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1206 *
1207 * If the pain of reading these is too great, it should be a straightforward
1208 * task to translate them into Linux-specific versions which are more
1209 * consistent with the style used in NFSv2/v3...
1210 */
1211 #define ENCODE_HEAD __be32 *p
1212
1213 #define WRITE32(n) *p++ = htonl(n)
1214 #define WRITE64(n) do { \
1215 *p++ = htonl((u32)((n) >> 32)); \
1216 *p++ = htonl((u32)(n)); \
1217 } while (0)
1218 #define WRITEMEM(ptr,nbytes) do { \
1219 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1220 memcpy(p, ptr, nbytes); \
1221 p += XDR_QUADLEN(nbytes); \
1222 } while (0)
1223 #define WRITECINFO(c) do { \
1224 *p++ = htonl(c.atomic); \
1225 *p++ = htonl(c.before_ctime_sec); \
1226 *p++ = htonl(c.before_ctime_nsec); \
1227 *p++ = htonl(c.after_ctime_sec); \
1228 *p++ = htonl(c.after_ctime_nsec); \
1229 } while (0)
1230
1231 #define RESERVE_SPACE(nbytes) do { \
1232 p = resp->p; \
1233 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1234 } while (0)
1235 #define ADJUST_ARGS() resp->p = p
1236
1237 /*
1238 * Header routine to setup seqid operation replay cache
1239 */
1240 #define ENCODE_SEQID_OP_HEAD \
1241 __be32 *p; \
1242 __be32 *save; \
1243 \
1244 save = resp->p;
1245
1246 /*
1247 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1248 * is where sequence id's are incremented, and the replay cache is filled.
1249 * Note that we increment sequence id's here, at the last moment, so we're sure
1250 * we know whether the error to be returned is a sequence id mutating error.
1251 */
1252
1253 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1254 if (seqid_mutating_err(nfserr) && stateowner) { \
1255 stateowner->so_seqid++; \
1256 stateowner->so_replay.rp_status = nfserr; \
1257 stateowner->so_replay.rp_buflen = \
1258 (((char *)(resp)->p - (char *)save)); \
1259 memcpy(stateowner->so_replay.rp_buf, save, \
1260 stateowner->so_replay.rp_buflen); \
1261 } } while (0);
1262
1263 /* Encode as an array of strings the string given with components
1264 * seperated @sep.
1265 */
1266 static __be32 nfsd4_encode_components(char sep, char *components,
1267 __be32 **pp, int *buflen)
1268 {
1269 __be32 *p = *pp;
1270 __be32 *countp = p;
1271 int strlen, count=0;
1272 char *str, *end;
1273
1274 dprintk("nfsd4_encode_components(%s)\n", components);
1275 if ((*buflen -= 4) < 0)
1276 return nfserr_resource;
1277 WRITE32(0); /* We will fill this in with @count later */
1278 end = str = components;
1279 while (*end) {
1280 for (; *end && (*end != sep); end++)
1281 ; /* Point to end of component */
1282 strlen = end - str;
1283 if (strlen) {
1284 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1285 return nfserr_resource;
1286 WRITE32(strlen);
1287 WRITEMEM(str, strlen);
1288 count++;
1289 }
1290 else
1291 end++;
1292 str = end;
1293 }
1294 *pp = p;
1295 p = countp;
1296 WRITE32(count);
1297 return 0;
1298 }
1299
1300 /*
1301 * encode a location element of a fs_locations structure
1302 */
1303 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1304 __be32 **pp, int *buflen)
1305 {
1306 __be32 status;
1307 __be32 *p = *pp;
1308
1309 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1310 if (status)
1311 return status;
1312 status = nfsd4_encode_components('/', location->path, &p, buflen);
1313 if (status)
1314 return status;
1315 *pp = p;
1316 return 0;
1317 }
1318
1319 /*
1320 * Return the path to an export point in the pseudo filesystem namespace
1321 * Returned string is safe to use as long as the caller holds a reference
1322 * to @exp.
1323 */
1324 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1325 {
1326 struct svc_fh tmp_fh;
1327 char *path, *rootpath;
1328
1329 fh_init(&tmp_fh, NFS4_FHSIZE);
1330 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1331 if (*stat)
1332 return NULL;
1333 rootpath = tmp_fh.fh_export->ex_path;
1334
1335 path = exp->ex_path;
1336
1337 if (strncmp(path, rootpath, strlen(rootpath))) {
1338 dprintk("nfsd: fs_locations failed;"
1339 "%s is not contained in %s\n", path, rootpath);
1340 *stat = nfserr_notsupp;
1341 return NULL;
1342 }
1343
1344 return path + strlen(rootpath);
1345 }
1346
1347 /*
1348 * encode a fs_locations structure
1349 */
1350 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1351 struct svc_export *exp,
1352 __be32 **pp, int *buflen)
1353 {
1354 __be32 status;
1355 int i;
1356 __be32 *p = *pp;
1357 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1358 char *root = nfsd4_path(rqstp, exp, &status);
1359
1360 if (status)
1361 return status;
1362 status = nfsd4_encode_components('/', root, &p, buflen);
1363 if (status)
1364 return status;
1365 if ((*buflen -= 4) < 0)
1366 return nfserr_resource;
1367 WRITE32(fslocs->locations_count);
1368 for (i=0; i<fslocs->locations_count; i++) {
1369 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1370 &p, buflen);
1371 if (status)
1372 return status;
1373 }
1374 *pp = p;
1375 return 0;
1376 }
1377
1378 static u32 nfs4_ftypes[16] = {
1379 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1380 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1381 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1382 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1383 };
1384
1385 static __be32
1386 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1387 __be32 **p, int *buflen)
1388 {
1389 int status;
1390
1391 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1392 return nfserr_resource;
1393 if (whotype != NFS4_ACL_WHO_NAMED)
1394 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1395 else if (group)
1396 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1397 else
1398 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1399 if (status < 0)
1400 return nfserrno(status);
1401 *p = xdr_encode_opaque(*p, NULL, status);
1402 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1403 BUG_ON(*buflen < 0);
1404 return 0;
1405 }
1406
1407 static inline __be32
1408 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1409 {
1410 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1411 }
1412
1413 static inline __be32
1414 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1415 {
1416 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1417 }
1418
1419 static inline __be32
1420 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1421 __be32 **p, int *buflen)
1422 {
1423 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1424 }
1425
1426 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1427 FATTR4_WORD0_RDATTR_ERROR)
1428 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1429
1430 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1431 {
1432 /* As per referral draft: */
1433 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1434 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1435 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1436 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1437 *rdattr_err = NFSERR_MOVED;
1438 else
1439 return nfserr_moved;
1440 }
1441 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1442 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1443 return 0;
1444 }
1445
1446 /*
1447 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1448 * ourselves.
1449 *
1450 * @countp is the buffer size in _words_; upon successful return this becomes
1451 * replaced with the number of words written.
1452 */
1453 __be32
1454 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1455 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1456 struct svc_rqst *rqstp)
1457 {
1458 u32 bmval0 = bmval[0];
1459 u32 bmval1 = bmval[1];
1460 struct kstat stat;
1461 struct svc_fh tempfh;
1462 struct kstatfs statfs;
1463 int buflen = *countp << 2;
1464 __be32 *attrlenp;
1465 u32 dummy;
1466 u64 dummy64;
1467 u32 rdattr_err = 0;
1468 __be32 *p = buffer;
1469 __be32 status;
1470 int err;
1471 int aclsupport = 0;
1472 struct nfs4_acl *acl = NULL;
1473
1474 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1475 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1476 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1477
1478 if (exp->ex_fslocs.migrated) {
1479 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1480 if (status)
1481 goto out;
1482 }
1483
1484 err = vfs_getattr(exp->ex_mnt, dentry, &stat);
1485 if (err)
1486 goto out_nfserr;
1487 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1488 FATTR4_WORD0_MAXNAME)) ||
1489 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1490 FATTR4_WORD1_SPACE_TOTAL))) {
1491 err = vfs_statfs(dentry, &statfs);
1492 if (err)
1493 goto out_nfserr;
1494 }
1495 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1496 fh_init(&tempfh, NFS4_FHSIZE);
1497 status = fh_compose(&tempfh, exp, dentry, NULL);
1498 if (status)
1499 goto out;
1500 fhp = &tempfh;
1501 }
1502 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1503 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1504 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1505 aclsupport = (err == 0);
1506 if (bmval0 & FATTR4_WORD0_ACL) {
1507 if (err == -EOPNOTSUPP)
1508 bmval0 &= ~FATTR4_WORD0_ACL;
1509 else if (err == -EINVAL) {
1510 status = nfserr_attrnotsupp;
1511 goto out;
1512 } else if (err != 0)
1513 goto out_nfserr;
1514 }
1515 }
1516 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1517 if (exp->ex_fslocs.locations == NULL) {
1518 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1519 }
1520 }
1521 if ((buflen -= 16) < 0)
1522 goto out_resource;
1523
1524 WRITE32(2);
1525 WRITE32(bmval0);
1526 WRITE32(bmval1);
1527 attrlenp = p++; /* to be backfilled later */
1528
1529 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1530 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1531 if ((buflen -= 12) < 0)
1532 goto out_resource;
1533 if (!aclsupport)
1534 word0 &= ~FATTR4_WORD0_ACL;
1535 if (!exp->ex_fslocs.locations)
1536 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1537 WRITE32(2);
1538 WRITE32(word0);
1539 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1540 }
1541 if (bmval0 & FATTR4_WORD0_TYPE) {
1542 if ((buflen -= 4) < 0)
1543 goto out_resource;
1544 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1545 if (dummy == NF4BAD)
1546 goto out_serverfault;
1547 WRITE32(dummy);
1548 }
1549 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1550 if ((buflen -= 4) < 0)
1551 goto out_resource;
1552 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1553 WRITE32(NFS4_FH_PERSISTENT);
1554 else
1555 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1556 }
1557 if (bmval0 & FATTR4_WORD0_CHANGE) {
1558 /*
1559 * Note: This _must_ be consistent with the scheme for writing
1560 * change_info, so any changes made here must be reflected there
1561 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1562 * macro above.)
1563 */
1564 if ((buflen -= 8) < 0)
1565 goto out_resource;
1566 WRITE32(stat.ctime.tv_sec);
1567 WRITE32(stat.ctime.tv_nsec);
1568 }
1569 if (bmval0 & FATTR4_WORD0_SIZE) {
1570 if ((buflen -= 8) < 0)
1571 goto out_resource;
1572 WRITE64(stat.size);
1573 }
1574 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1575 if ((buflen -= 4) < 0)
1576 goto out_resource;
1577 WRITE32(1);
1578 }
1579 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1580 if ((buflen -= 4) < 0)
1581 goto out_resource;
1582 WRITE32(1);
1583 }
1584 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1585 if ((buflen -= 4) < 0)
1586 goto out_resource;
1587 WRITE32(0);
1588 }
1589 if (bmval0 & FATTR4_WORD0_FSID) {
1590 if ((buflen -= 16) < 0)
1591 goto out_resource;
1592 if (exp->ex_fslocs.migrated) {
1593 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1594 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1595 } else switch(fsid_source(fhp)) {
1596 case FSIDSOURCE_FSID:
1597 WRITE64((u64)exp->ex_fsid);
1598 WRITE64((u64)0);
1599 break;
1600 case FSIDSOURCE_DEV:
1601 WRITE32(0);
1602 WRITE32(MAJOR(stat.dev));
1603 WRITE32(0);
1604 WRITE32(MINOR(stat.dev));
1605 break;
1606 case FSIDSOURCE_UUID:
1607 WRITEMEM(exp->ex_uuid, 16);
1608 break;
1609 }
1610 }
1611 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1612 if ((buflen -= 4) < 0)
1613 goto out_resource;
1614 WRITE32(0);
1615 }
1616 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1617 if ((buflen -= 4) < 0)
1618 goto out_resource;
1619 WRITE32(NFSD_LEASE_TIME);
1620 }
1621 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1622 if ((buflen -= 4) < 0)
1623 goto out_resource;
1624 WRITE32(rdattr_err);
1625 }
1626 if (bmval0 & FATTR4_WORD0_ACL) {
1627 struct nfs4_ace *ace;
1628
1629 if (acl == NULL) {
1630 if ((buflen -= 4) < 0)
1631 goto out_resource;
1632
1633 WRITE32(0);
1634 goto out_acl;
1635 }
1636 if ((buflen -= 4) < 0)
1637 goto out_resource;
1638 WRITE32(acl->naces);
1639
1640 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1641 if ((buflen -= 4*3) < 0)
1642 goto out_resource;
1643 WRITE32(ace->type);
1644 WRITE32(ace->flag);
1645 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1646 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1647 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1648 &p, &buflen);
1649 if (status == nfserr_resource)
1650 goto out_resource;
1651 if (status)
1652 goto out;
1653 }
1654 }
1655 out_acl:
1656 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1657 if ((buflen -= 4) < 0)
1658 goto out_resource;
1659 WRITE32(aclsupport ?
1660 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1661 }
1662 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1663 if ((buflen -= 4) < 0)
1664 goto out_resource;
1665 WRITE32(1);
1666 }
1667 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1668 if ((buflen -= 4) < 0)
1669 goto out_resource;
1670 WRITE32(1);
1671 }
1672 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1673 if ((buflen -= 4) < 0)
1674 goto out_resource;
1675 WRITE32(1);
1676 }
1677 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1678 if ((buflen -= 4) < 0)
1679 goto out_resource;
1680 WRITE32(1);
1681 }
1682 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1683 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1684 if (buflen < 0)
1685 goto out_resource;
1686 WRITE32(fhp->fh_handle.fh_size);
1687 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1688 }
1689 if (bmval0 & FATTR4_WORD0_FILEID) {
1690 if ((buflen -= 8) < 0)
1691 goto out_resource;
1692 WRITE64(stat.ino);
1693 }
1694 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1695 if ((buflen -= 8) < 0)
1696 goto out_resource;
1697 WRITE64((u64) statfs.f_ffree);
1698 }
1699 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1700 if ((buflen -= 8) < 0)
1701 goto out_resource;
1702 WRITE64((u64) statfs.f_ffree);
1703 }
1704 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1705 if ((buflen -= 8) < 0)
1706 goto out_resource;
1707 WRITE64((u64) statfs.f_files);
1708 }
1709 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1710 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1711 if (status == nfserr_resource)
1712 goto out_resource;
1713 if (status)
1714 goto out;
1715 }
1716 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1717 if ((buflen -= 4) < 0)
1718 goto out_resource;
1719 WRITE32(1);
1720 }
1721 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1722 if ((buflen -= 8) < 0)
1723 goto out_resource;
1724 WRITE64(~(u64)0);
1725 }
1726 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1727 if ((buflen -= 4) < 0)
1728 goto out_resource;
1729 WRITE32(255);
1730 }
1731 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1732 if ((buflen -= 4) < 0)
1733 goto out_resource;
1734 WRITE32(statfs.f_namelen);
1735 }
1736 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1737 if ((buflen -= 8) < 0)
1738 goto out_resource;
1739 WRITE64((u64) svc_max_payload(rqstp));
1740 }
1741 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1742 if ((buflen -= 8) < 0)
1743 goto out_resource;
1744 WRITE64((u64) svc_max_payload(rqstp));
1745 }
1746 if (bmval1 & FATTR4_WORD1_MODE) {
1747 if ((buflen -= 4) < 0)
1748 goto out_resource;
1749 WRITE32(stat.mode & S_IALLUGO);
1750 }
1751 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1752 if ((buflen -= 4) < 0)
1753 goto out_resource;
1754 WRITE32(1);
1755 }
1756 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1757 if ((buflen -= 4) < 0)
1758 goto out_resource;
1759 WRITE32(stat.nlink);
1760 }
1761 if (bmval1 & FATTR4_WORD1_OWNER) {
1762 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1763 if (status == nfserr_resource)
1764 goto out_resource;
1765 if (status)
1766 goto out;
1767 }
1768 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1769 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1770 if (status == nfserr_resource)
1771 goto out_resource;
1772 if (status)
1773 goto out;
1774 }
1775 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1776 if ((buflen -= 8) < 0)
1777 goto out_resource;
1778 WRITE32((u32) MAJOR(stat.rdev));
1779 WRITE32((u32) MINOR(stat.rdev));
1780 }
1781 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1782 if ((buflen -= 8) < 0)
1783 goto out_resource;
1784 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1785 WRITE64(dummy64);
1786 }
1787 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1788 if ((buflen -= 8) < 0)
1789 goto out_resource;
1790 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1791 WRITE64(dummy64);
1792 }
1793 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1794 if ((buflen -= 8) < 0)
1795 goto out_resource;
1796 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1797 WRITE64(dummy64);
1798 }
1799 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1800 if ((buflen -= 8) < 0)
1801 goto out_resource;
1802 dummy64 = (u64)stat.blocks << 9;
1803 WRITE64(dummy64);
1804 }
1805 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1806 if ((buflen -= 12) < 0)
1807 goto out_resource;
1808 WRITE32(0);
1809 WRITE32(stat.atime.tv_sec);
1810 WRITE32(stat.atime.tv_nsec);
1811 }
1812 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1813 if ((buflen -= 12) < 0)
1814 goto out_resource;
1815 WRITE32(0);
1816 WRITE32(1);
1817 WRITE32(0);
1818 }
1819 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1820 if ((buflen -= 12) < 0)
1821 goto out_resource;
1822 WRITE32(0);
1823 WRITE32(stat.ctime.tv_sec);
1824 WRITE32(stat.ctime.tv_nsec);
1825 }
1826 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1827 if ((buflen -= 12) < 0)
1828 goto out_resource;
1829 WRITE32(0);
1830 WRITE32(stat.mtime.tv_sec);
1831 WRITE32(stat.mtime.tv_nsec);
1832 }
1833 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1834 if ((buflen -= 8) < 0)
1835 goto out_resource;
1836 if (exp->ex_mnt->mnt_root->d_inode == dentry->d_inode) {
1837 err = vfs_getattr(exp->ex_mnt->mnt_parent,
1838 exp->ex_mnt->mnt_mountpoint, &stat);
1839 if (err)
1840 goto out_nfserr;
1841 }
1842 WRITE64(stat.ino);
1843 }
1844 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1845 *countp = p - buffer;
1846 status = nfs_ok;
1847
1848 out:
1849 kfree(acl);
1850 if (fhp == &tempfh)
1851 fh_put(&tempfh);
1852 return status;
1853 out_nfserr:
1854 status = nfserrno(err);
1855 goto out;
1856 out_resource:
1857 *countp = 0;
1858 status = nfserr_resource;
1859 goto out;
1860 out_serverfault:
1861 status = nfserr_serverfault;
1862 goto out;
1863 }
1864
1865 static __be32
1866 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1867 const char *name, int namlen, __be32 *p, int *buflen)
1868 {
1869 struct svc_export *exp = cd->rd_fhp->fh_export;
1870 struct dentry *dentry;
1871 __be32 nfserr;
1872
1873 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1874 if (IS_ERR(dentry))
1875 return nfserrno(PTR_ERR(dentry));
1876
1877 exp_get(exp);
1878 if (d_mountpoint(dentry)) {
1879 int err;
1880
1881 /*
1882 * Why the heck aren't we just using nfsd_lookup??
1883 * Different "."/".." handling? Something else?
1884 * At least, add a comment here to explain....
1885 */
1886 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1887 if (err) {
1888 nfserr = nfserrno(err);
1889 goto out_put;
1890 }
1891 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
1892 if (nfserr)
1893 goto out_put;
1894
1895 }
1896 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1897 cd->rd_rqstp);
1898 out_put:
1899 dput(dentry);
1900 exp_put(exp);
1901 return nfserr;
1902 }
1903
1904 static __be32 *
1905 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1906 {
1907 __be32 *attrlenp;
1908
1909 if (buflen < 6)
1910 return NULL;
1911 *p++ = htonl(2);
1912 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1913 *p++ = htonl(0); /* bmval1 */
1914
1915 attrlenp = p++;
1916 *p++ = nfserr; /* no htonl */
1917 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1918 return p;
1919 }
1920
1921 static int
1922 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1923 loff_t offset, u64 ino, unsigned int d_type)
1924 {
1925 struct readdir_cd *ccd = ccdv;
1926 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1927 int buflen;
1928 __be32 *p = cd->buffer;
1929 __be32 nfserr = nfserr_toosmall;
1930
1931 /* In nfsv4, "." and ".." never make it onto the wire.. */
1932 if (name && isdotent(name, namlen)) {
1933 cd->common.err = nfs_ok;
1934 return 0;
1935 }
1936
1937 if (cd->offset)
1938 xdr_encode_hyper(cd->offset, (u64) offset);
1939
1940 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1941 if (buflen < 0)
1942 goto fail;
1943
1944 *p++ = xdr_one; /* mark entry present */
1945 cd->offset = p; /* remember pointer */
1946 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1947 p = xdr_encode_array(p, name, namlen); /* name length & name */
1948
1949 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1950 switch (nfserr) {
1951 case nfs_ok:
1952 p += buflen;
1953 break;
1954 case nfserr_resource:
1955 nfserr = nfserr_toosmall;
1956 goto fail;
1957 case nfserr_dropit:
1958 goto fail;
1959 default:
1960 /*
1961 * If the client requested the RDATTR_ERROR attribute,
1962 * we stuff the error code into this attribute
1963 * and continue. If this attribute was not requested,
1964 * then in accordance with the spec, we fail the
1965 * entire READDIR operation(!)
1966 */
1967 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1968 goto fail;
1969 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1970 if (p == NULL) {
1971 nfserr = nfserr_toosmall;
1972 goto fail;
1973 }
1974 }
1975 cd->buflen -= (p - cd->buffer);
1976 cd->buffer = p;
1977 cd->common.err = nfs_ok;
1978 return 0;
1979 fail:
1980 cd->common.err = nfserr;
1981 return -EINVAL;
1982 }
1983
1984 static void
1985 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1986 {
1987 ENCODE_HEAD;
1988
1989 if (!nfserr) {
1990 RESERVE_SPACE(8);
1991 WRITE32(access->ac_supported);
1992 WRITE32(access->ac_resp_access);
1993 ADJUST_ARGS();
1994 }
1995 }
1996
1997 static void
1998 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1999 {
2000 ENCODE_SEQID_OP_HEAD;
2001
2002 if (!nfserr) {
2003 RESERVE_SPACE(sizeof(stateid_t));
2004 WRITE32(close->cl_stateid.si_generation);
2005 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
2006 ADJUST_ARGS();
2007 }
2008 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2009 }
2010
2011
2012 static void
2013 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2014 {
2015 ENCODE_HEAD;
2016
2017 if (!nfserr) {
2018 RESERVE_SPACE(8);
2019 WRITEMEM(commit->co_verf.data, 8);
2020 ADJUST_ARGS();
2021 }
2022 }
2023
2024 static void
2025 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2026 {
2027 ENCODE_HEAD;
2028
2029 if (!nfserr) {
2030 RESERVE_SPACE(32);
2031 WRITECINFO(create->cr_cinfo);
2032 WRITE32(2);
2033 WRITE32(create->cr_bmval[0]);
2034 WRITE32(create->cr_bmval[1]);
2035 ADJUST_ARGS();
2036 }
2037 }
2038
2039 static __be32
2040 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2041 {
2042 struct svc_fh *fhp = getattr->ga_fhp;
2043 int buflen;
2044
2045 if (nfserr)
2046 return nfserr;
2047
2048 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2049 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2050 resp->p, &buflen, getattr->ga_bmval,
2051 resp->rqstp);
2052 if (!nfserr)
2053 resp->p += buflen;
2054 return nfserr;
2055 }
2056
2057 static void
2058 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
2059 {
2060 unsigned int len;
2061 ENCODE_HEAD;
2062
2063 if (!nfserr) {
2064 len = fhp->fh_handle.fh_size;
2065 RESERVE_SPACE(len + 4);
2066 WRITE32(len);
2067 WRITEMEM(&fhp->fh_handle.fh_base, len);
2068 ADJUST_ARGS();
2069 }
2070 }
2071
2072 /*
2073 * Including all fields other than the name, a LOCK4denied structure requires
2074 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2075 */
2076 static void
2077 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2078 {
2079 ENCODE_HEAD;
2080
2081 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2082 WRITE64(ld->ld_start);
2083 WRITE64(ld->ld_length);
2084 WRITE32(ld->ld_type);
2085 if (ld->ld_sop) {
2086 WRITEMEM(&ld->ld_clientid, 8);
2087 WRITE32(ld->ld_sop->so_owner.len);
2088 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2089 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2090 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2091 WRITE64((u64)0); /* clientid */
2092 WRITE32(0); /* length of owner name */
2093 }
2094 ADJUST_ARGS();
2095 }
2096
2097 static void
2098 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2099 {
2100 ENCODE_SEQID_OP_HEAD;
2101
2102 if (!nfserr) {
2103 RESERVE_SPACE(4 + sizeof(stateid_t));
2104 WRITE32(lock->lk_resp_stateid.si_generation);
2105 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2106 ADJUST_ARGS();
2107 } else if (nfserr == nfserr_denied)
2108 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2109
2110 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2111 }
2112
2113 static void
2114 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2115 {
2116 if (nfserr == nfserr_denied)
2117 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2118 }
2119
2120 static void
2121 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2122 {
2123 ENCODE_SEQID_OP_HEAD;
2124
2125 if (!nfserr) {
2126 RESERVE_SPACE(sizeof(stateid_t));
2127 WRITE32(locku->lu_stateid.si_generation);
2128 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2129 ADJUST_ARGS();
2130 }
2131
2132 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2133 }
2134
2135
2136 static void
2137 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2138 {
2139 ENCODE_HEAD;
2140
2141 if (!nfserr) {
2142 RESERVE_SPACE(20);
2143 WRITECINFO(link->li_cinfo);
2144 ADJUST_ARGS();
2145 }
2146 }
2147
2148
2149 static void
2150 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2151 {
2152 ENCODE_SEQID_OP_HEAD;
2153
2154 if (nfserr)
2155 goto out;
2156
2157 RESERVE_SPACE(36 + sizeof(stateid_t));
2158 WRITE32(open->op_stateid.si_generation);
2159 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2160 WRITECINFO(open->op_cinfo);
2161 WRITE32(open->op_rflags);
2162 WRITE32(2);
2163 WRITE32(open->op_bmval[0]);
2164 WRITE32(open->op_bmval[1]);
2165 WRITE32(open->op_delegate_type);
2166 ADJUST_ARGS();
2167
2168 switch (open->op_delegate_type) {
2169 case NFS4_OPEN_DELEGATE_NONE:
2170 break;
2171 case NFS4_OPEN_DELEGATE_READ:
2172 RESERVE_SPACE(20 + sizeof(stateid_t));
2173 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2174 WRITE32(open->op_recall);
2175
2176 /*
2177 * TODO: ACE's in delegations
2178 */
2179 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2180 WRITE32(0);
2181 WRITE32(0);
2182 WRITE32(0); /* XXX: is NULL principal ok? */
2183 ADJUST_ARGS();
2184 break;
2185 case NFS4_OPEN_DELEGATE_WRITE:
2186 RESERVE_SPACE(32 + sizeof(stateid_t));
2187 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2188 WRITE32(0);
2189
2190 /*
2191 * TODO: space_limit's in delegations
2192 */
2193 WRITE32(NFS4_LIMIT_SIZE);
2194 WRITE32(~(u32)0);
2195 WRITE32(~(u32)0);
2196
2197 /*
2198 * TODO: ACE's in delegations
2199 */
2200 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2201 WRITE32(0);
2202 WRITE32(0);
2203 WRITE32(0); /* XXX: is NULL principal ok? */
2204 ADJUST_ARGS();
2205 break;
2206 default:
2207 BUG();
2208 }
2209 /* XXX save filehandle here */
2210 out:
2211 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2212 }
2213
2214 static void
2215 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2216 {
2217 ENCODE_SEQID_OP_HEAD;
2218
2219 if (!nfserr) {
2220 RESERVE_SPACE(sizeof(stateid_t));
2221 WRITE32(oc->oc_resp_stateid.si_generation);
2222 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2223 ADJUST_ARGS();
2224 }
2225
2226 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2227 }
2228
2229 static void
2230 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2231 {
2232 ENCODE_SEQID_OP_HEAD;
2233
2234 if (!nfserr) {
2235 RESERVE_SPACE(sizeof(stateid_t));
2236 WRITE32(od->od_stateid.si_generation);
2237 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2238 ADJUST_ARGS();
2239 }
2240
2241 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2242 }
2243
2244 static __be32
2245 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2246 struct nfsd4_read *read)
2247 {
2248 u32 eof;
2249 int v, pn;
2250 unsigned long maxcount;
2251 long len;
2252 ENCODE_HEAD;
2253
2254 if (nfserr)
2255 return nfserr;
2256 if (resp->xbuf->page_len)
2257 return nfserr_resource;
2258
2259 RESERVE_SPACE(8); /* eof flag and byte count */
2260
2261 maxcount = svc_max_payload(resp->rqstp);
2262 if (maxcount > read->rd_length)
2263 maxcount = read->rd_length;
2264
2265 len = maxcount;
2266 v = 0;
2267 while (len > 0) {
2268 pn = resp->rqstp->rq_resused++;
2269 resp->rqstp->rq_vec[v].iov_base =
2270 page_address(resp->rqstp->rq_respages[pn]);
2271 resp->rqstp->rq_vec[v].iov_len =
2272 len < PAGE_SIZE ? len : PAGE_SIZE;
2273 v++;
2274 len -= PAGE_SIZE;
2275 }
2276 read->rd_vlen = v;
2277
2278 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2279 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2280 &maxcount);
2281
2282 if (nfserr == nfserr_symlink)
2283 nfserr = nfserr_inval;
2284 if (nfserr)
2285 return nfserr;
2286 eof = (read->rd_offset + maxcount >=
2287 read->rd_fhp->fh_dentry->d_inode->i_size);
2288
2289 WRITE32(eof);
2290 WRITE32(maxcount);
2291 ADJUST_ARGS();
2292 resp->xbuf->head[0].iov_len = (char*)p
2293 - (char*)resp->xbuf->head[0].iov_base;
2294 resp->xbuf->page_len = maxcount;
2295
2296 /* Use rest of head for padding and remaining ops: */
2297 resp->xbuf->tail[0].iov_base = p;
2298 resp->xbuf->tail[0].iov_len = 0;
2299 if (maxcount&3) {
2300 RESERVE_SPACE(4);
2301 WRITE32(0);
2302 resp->xbuf->tail[0].iov_base += maxcount&3;
2303 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2304 ADJUST_ARGS();
2305 }
2306 return 0;
2307 }
2308
2309 static __be32
2310 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2311 {
2312 int maxcount;
2313 char *page;
2314 ENCODE_HEAD;
2315
2316 if (nfserr)
2317 return nfserr;
2318 if (resp->xbuf->page_len)
2319 return nfserr_resource;
2320
2321 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2322
2323 maxcount = PAGE_SIZE;
2324 RESERVE_SPACE(4);
2325
2326 /*
2327 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2328 * if they would overflow the buffer. Is this kosher in NFSv4? If
2329 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2330 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2331 */
2332 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2333 if (nfserr == nfserr_isdir)
2334 return nfserr_inval;
2335 if (nfserr)
2336 return nfserr;
2337
2338 WRITE32(maxcount);
2339 ADJUST_ARGS();
2340 resp->xbuf->head[0].iov_len = (char*)p
2341 - (char*)resp->xbuf->head[0].iov_base;
2342 resp->xbuf->page_len = maxcount;
2343
2344 /* Use rest of head for padding and remaining ops: */
2345 resp->xbuf->tail[0].iov_base = p;
2346 resp->xbuf->tail[0].iov_len = 0;
2347 if (maxcount&3) {
2348 RESERVE_SPACE(4);
2349 WRITE32(0);
2350 resp->xbuf->tail[0].iov_base += maxcount&3;
2351 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2352 ADJUST_ARGS();
2353 }
2354 return 0;
2355 }
2356
2357 static __be32
2358 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2359 {
2360 int maxcount;
2361 loff_t offset;
2362 __be32 *page, *savep, *tailbase;
2363 ENCODE_HEAD;
2364
2365 if (nfserr)
2366 return nfserr;
2367 if (resp->xbuf->page_len)
2368 return nfserr_resource;
2369
2370 RESERVE_SPACE(8); /* verifier */
2371 savep = p;
2372
2373 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2374 WRITE32(0);
2375 WRITE32(0);
2376 ADJUST_ARGS();
2377 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2378 tailbase = p;
2379
2380 maxcount = PAGE_SIZE;
2381 if (maxcount > readdir->rd_maxcount)
2382 maxcount = readdir->rd_maxcount;
2383
2384 /*
2385 * Convert from bytes to words, account for the two words already
2386 * written, make sure to leave two words at the end for the next
2387 * pointer and eof field.
2388 */
2389 maxcount = (maxcount >> 2) - 4;
2390 if (maxcount < 0) {
2391 nfserr = nfserr_toosmall;
2392 goto err_no_verf;
2393 }
2394
2395 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2396 readdir->common.err = 0;
2397 readdir->buflen = maxcount;
2398 readdir->buffer = page;
2399 readdir->offset = NULL;
2400
2401 offset = readdir->rd_cookie;
2402 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2403 &offset,
2404 &readdir->common, nfsd4_encode_dirent);
2405 if (nfserr == nfs_ok &&
2406 readdir->common.err == nfserr_toosmall &&
2407 readdir->buffer == page)
2408 nfserr = nfserr_toosmall;
2409 if (nfserr == nfserr_symlink)
2410 nfserr = nfserr_notdir;
2411 if (nfserr)
2412 goto err_no_verf;
2413
2414 if (readdir->offset)
2415 xdr_encode_hyper(readdir->offset, offset);
2416
2417 p = readdir->buffer;
2418 *p++ = 0; /* no more entries */
2419 *p++ = htonl(readdir->common.err == nfserr_eof);
2420 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2421 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2422
2423 /* Use rest of head for padding and remaining ops: */
2424 resp->xbuf->tail[0].iov_base = tailbase;
2425 resp->xbuf->tail[0].iov_len = 0;
2426 resp->p = resp->xbuf->tail[0].iov_base;
2427 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2428
2429 return 0;
2430 err_no_verf:
2431 p = savep;
2432 ADJUST_ARGS();
2433 return nfserr;
2434 }
2435
2436 static void
2437 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2438 {
2439 ENCODE_HEAD;
2440
2441 if (!nfserr) {
2442 RESERVE_SPACE(20);
2443 WRITECINFO(remove->rm_cinfo);
2444 ADJUST_ARGS();
2445 }
2446 }
2447
2448 static void
2449 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2450 {
2451 ENCODE_HEAD;
2452
2453 if (!nfserr) {
2454 RESERVE_SPACE(40);
2455 WRITECINFO(rename->rn_sinfo);
2456 WRITECINFO(rename->rn_tinfo);
2457 ADJUST_ARGS();
2458 }
2459 }
2460
2461 static void
2462 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2463 struct nfsd4_secinfo *secinfo)
2464 {
2465 int i = 0;
2466 struct svc_export *exp = secinfo->si_exp;
2467 u32 nflavs;
2468 struct exp_flavor_info *flavs;
2469 struct exp_flavor_info def_flavs[2];
2470 ENCODE_HEAD;
2471
2472 if (nfserr)
2473 goto out;
2474 if (exp->ex_nflavors) {
2475 flavs = exp->ex_flavors;
2476 nflavs = exp->ex_nflavors;
2477 } else { /* Handling of some defaults in absence of real secinfo: */
2478 flavs = def_flavs;
2479 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2480 nflavs = 2;
2481 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2482 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2483 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2484 nflavs = 1;
2485 flavs[0].pseudoflavor
2486 = svcauth_gss_flavor(exp->ex_client);
2487 } else {
2488 nflavs = 1;
2489 flavs[0].pseudoflavor
2490 = exp->ex_client->flavour->flavour;
2491 }
2492 }
2493
2494 RESERVE_SPACE(4);
2495 WRITE32(nflavs);
2496 ADJUST_ARGS();
2497 for (i = 0; i < nflavs; i++) {
2498 u32 flav = flavs[i].pseudoflavor;
2499 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2500
2501 if (gm) {
2502 RESERVE_SPACE(4);
2503 WRITE32(RPC_AUTH_GSS);
2504 ADJUST_ARGS();
2505 RESERVE_SPACE(4 + gm->gm_oid.len);
2506 WRITE32(gm->gm_oid.len);
2507 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2508 ADJUST_ARGS();
2509 RESERVE_SPACE(4);
2510 WRITE32(0); /* qop */
2511 ADJUST_ARGS();
2512 RESERVE_SPACE(4);
2513 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2514 ADJUST_ARGS();
2515 gss_mech_put(gm);
2516 } else {
2517 RESERVE_SPACE(4);
2518 WRITE32(flav);
2519 ADJUST_ARGS();
2520 }
2521 }
2522 out:
2523 if (exp)
2524 exp_put(exp);
2525 }
2526
2527 /*
2528 * The SETATTR encode routine is special -- it always encodes a bitmap,
2529 * regardless of the error status.
2530 */
2531 static void
2532 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2533 {
2534 ENCODE_HEAD;
2535
2536 RESERVE_SPACE(12);
2537 if (nfserr) {
2538 WRITE32(2);
2539 WRITE32(0);
2540 WRITE32(0);
2541 }
2542 else {
2543 WRITE32(2);
2544 WRITE32(setattr->sa_bmval[0]);
2545 WRITE32(setattr->sa_bmval[1]);
2546 }
2547 ADJUST_ARGS();
2548 }
2549
2550 static void
2551 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2552 {
2553 ENCODE_HEAD;
2554
2555 if (!nfserr) {
2556 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2557 WRITEMEM(&scd->se_clientid, 8);
2558 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2559 ADJUST_ARGS();
2560 }
2561 else if (nfserr == nfserr_clid_inuse) {
2562 RESERVE_SPACE(8);
2563 WRITE32(0);
2564 WRITE32(0);
2565 ADJUST_ARGS();
2566 }
2567 }
2568
2569 static void
2570 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2571 {
2572 ENCODE_HEAD;
2573
2574 if (!nfserr) {
2575 RESERVE_SPACE(16);
2576 WRITE32(write->wr_bytes_written);
2577 WRITE32(write->wr_how_written);
2578 WRITEMEM(write->wr_verifier.data, 8);
2579 ADJUST_ARGS();
2580 }
2581 }
2582
2583 void
2584 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2585 {
2586 __be32 *statp;
2587 ENCODE_HEAD;
2588
2589 RESERVE_SPACE(8);
2590 WRITE32(op->opnum);
2591 statp = p++; /* to be backfilled at the end */
2592 ADJUST_ARGS();
2593
2594 switch (op->opnum) {
2595 case OP_ACCESS:
2596 nfsd4_encode_access(resp, op->status, &op->u.access);
2597 break;
2598 case OP_CLOSE:
2599 nfsd4_encode_close(resp, op->status, &op->u.close);
2600 break;
2601 case OP_COMMIT:
2602 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2603 break;
2604 case OP_CREATE:
2605 nfsd4_encode_create(resp, op->status, &op->u.create);
2606 break;
2607 case OP_DELEGRETURN:
2608 break;
2609 case OP_GETATTR:
2610 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2611 break;
2612 case OP_GETFH:
2613 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2614 break;
2615 case OP_LINK:
2616 nfsd4_encode_link(resp, op->status, &op->u.link);
2617 break;
2618 case OP_LOCK:
2619 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2620 break;
2621 case OP_LOCKT:
2622 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2623 break;
2624 case OP_LOCKU:
2625 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2626 break;
2627 case OP_LOOKUP:
2628 break;
2629 case OP_LOOKUPP:
2630 break;
2631 case OP_NVERIFY:
2632 break;
2633 case OP_OPEN:
2634 nfsd4_encode_open(resp, op->status, &op->u.open);
2635 break;
2636 case OP_OPEN_CONFIRM:
2637 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2638 break;
2639 case OP_OPEN_DOWNGRADE:
2640 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2641 break;
2642 case OP_PUTFH:
2643 break;
2644 case OP_PUTROOTFH:
2645 break;
2646 case OP_READ:
2647 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2648 break;
2649 case OP_READDIR:
2650 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2651 break;
2652 case OP_READLINK:
2653 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2654 break;
2655 case OP_REMOVE:
2656 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2657 break;
2658 case OP_RENAME:
2659 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2660 break;
2661 case OP_RENEW:
2662 break;
2663 case OP_RESTOREFH:
2664 break;
2665 case OP_SAVEFH:
2666 break;
2667 case OP_SECINFO:
2668 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
2669 break;
2670 case OP_SETATTR:
2671 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2672 break;
2673 case OP_SETCLIENTID:
2674 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2675 break;
2676 case OP_SETCLIENTID_CONFIRM:
2677 break;
2678 case OP_VERIFY:
2679 break;
2680 case OP_WRITE:
2681 nfsd4_encode_write(resp, op->status, &op->u.write);
2682 break;
2683 case OP_RELEASE_LOCKOWNER:
2684 break;
2685 default:
2686 break;
2687 }
2688
2689 /*
2690 * Note: We write the status directly, instead of using WRITE32(),
2691 * since it is already in network byte order.
2692 */
2693 *statp = op->status;
2694 }
2695
2696 /*
2697 * Encode the reply stored in the stateowner reply cache
2698 *
2699 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2700 * previously sent already encoded operation.
2701 *
2702 * called with nfs4_lock_state() held
2703 */
2704 void
2705 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2706 {
2707 ENCODE_HEAD;
2708 struct nfs4_replay *rp = op->replay;
2709
2710 BUG_ON(!rp);
2711
2712 RESERVE_SPACE(8);
2713 WRITE32(op->opnum);
2714 *p++ = rp->rp_status; /* already xdr'ed */
2715 ADJUST_ARGS();
2716
2717 RESERVE_SPACE(rp->rp_buflen);
2718 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2719 ADJUST_ARGS();
2720 }
2721
2722 /*
2723 * END OF "GENERIC" ENCODE ROUTINES.
2724 */
2725
2726 int
2727 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2728 {
2729 return xdr_ressize_check(rqstp, p);
2730 }
2731
2732 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2733 {
2734 if (args->ops != args->iops) {
2735 kfree(args->ops);
2736 args->ops = args->iops;
2737 }
2738 kfree(args->tmpp);
2739 args->tmpp = NULL;
2740 while (args->to_free) {
2741 struct tmpbuf *tb = args->to_free;
2742 args->to_free = tb->next;
2743 tb->release(tb->buf);
2744 kfree(tb);
2745 }
2746 }
2747
2748 int
2749 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2750 {
2751 __be32 status;
2752
2753 args->p = p;
2754 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2755 args->pagelist = rqstp->rq_arg.pages;
2756 args->pagelen = rqstp->rq_arg.page_len;
2757 args->tmpp = NULL;
2758 args->to_free = NULL;
2759 args->ops = args->iops;
2760 args->rqstp = rqstp;
2761
2762 status = nfsd4_decode_compound(args);
2763 if (status) {
2764 nfsd4_release_compoundargs(args);
2765 }
2766 return !status;
2767 }
2768
2769 int
2770 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
2771 {
2772 /*
2773 * All that remains is to write the tag and operation count...
2774 */
2775 struct kvec *iov;
2776 p = resp->tagp;
2777 *p++ = htonl(resp->taglen);
2778 memcpy(p, resp->tag, resp->taglen);
2779 p += XDR_QUADLEN(resp->taglen);
2780 *p++ = htonl(resp->opcnt);
2781
2782 if (rqstp->rq_res.page_len)
2783 iov = &rqstp->rq_res.tail[0];
2784 else
2785 iov = &rqstp->rq_res.head[0];
2786 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2787 BUG_ON(iov->iov_len > PAGE_SIZE);
2788 return 1;
2789 }
2790
2791 /*
2792 * Local variables:
2793 * c-basic-offset: 8
2794 * End:
2795 */
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