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nfsd4: move idmap and acl header files into fs/nfsd
[thirdparty/linux.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/sunrpc/svcauth_gss.h>
48
49 #include "idmap.h"
50 #include "acl.h"
51 #include "xdr4.h"
52 #include "vfs.h"
53
54
55 #define NFSDDBG_FACILITY NFSDDBG_XDR
56
57 /*
58 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
59 * directory in order to indicate to the client that a filesystem boundary is present
60 * We use a fixed fsid for a referral
61 */
62 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
63 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
64
65 static __be32
66 check_filename(char *str, int len, __be32 err)
67 {
68 int i;
69
70 if (len == 0)
71 return nfserr_inval;
72 if (isdotent(str, len))
73 return err;
74 for (i = 0; i < len; i++)
75 if (str[i] == '/')
76 return err;
77 return 0;
78 }
79
80 #define DECODE_HEAD \
81 __be32 *p; \
82 __be32 status
83 #define DECODE_TAIL \
84 status = 0; \
85 out: \
86 return status; \
87 xdr_error: \
88 dprintk("NFSD: xdr error (%s:%d)\n", \
89 __FILE__, __LINE__); \
90 status = nfserr_bad_xdr; \
91 goto out
92
93 #define READ32(x) (x) = ntohl(*p++)
94 #define READ64(x) do { \
95 (x) = (u64)ntohl(*p++) << 32; \
96 (x) |= ntohl(*p++); \
97 } while (0)
98 #define READTIME(x) do { \
99 p++; \
100 (x) = ntohl(*p++); \
101 p++; \
102 } while (0)
103 #define READMEM(x,nbytes) do { \
104 x = (char *)p; \
105 p += XDR_QUADLEN(nbytes); \
106 } while (0)
107 #define SAVEMEM(x,nbytes) do { \
108 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
109 savemem(argp, p, nbytes) : \
110 (char *)p)) { \
111 dprintk("NFSD: xdr error (%s:%d)\n", \
112 __FILE__, __LINE__); \
113 goto xdr_error; \
114 } \
115 p += XDR_QUADLEN(nbytes); \
116 } while (0)
117 #define COPYMEM(x,nbytes) do { \
118 memcpy((x), p, nbytes); \
119 p += XDR_QUADLEN(nbytes); \
120 } while (0)
121
122 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
123 #define READ_BUF(nbytes) do { \
124 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
125 p = argp->p; \
126 argp->p += XDR_QUADLEN(nbytes); \
127 } else if (!(p = read_buf(argp, nbytes))) { \
128 dprintk("NFSD: xdr error (%s:%d)\n", \
129 __FILE__, __LINE__); \
130 goto xdr_error; \
131 } \
132 } while (0)
133
134 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
135 {
136 /* We want more bytes than seem to be available.
137 * Maybe we need a new page, maybe we have just run out
138 */
139 unsigned int avail = (char *)argp->end - (char *)argp->p;
140 __be32 *p;
141 if (avail + argp->pagelen < nbytes)
142 return NULL;
143 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
144 return NULL;
145 /* ok, we can do it with the current plus the next page */
146 if (nbytes <= sizeof(argp->tmp))
147 p = argp->tmp;
148 else {
149 kfree(argp->tmpp);
150 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
151 if (!p)
152 return NULL;
153
154 }
155 /*
156 * The following memcpy is safe because read_buf is always
157 * called with nbytes > avail, and the two cases above both
158 * guarantee p points to at least nbytes bytes.
159 */
160 memcpy(p, argp->p, avail);
161 /* step to next page */
162 argp->p = page_address(argp->pagelist[0]);
163 argp->pagelist++;
164 if (argp->pagelen < PAGE_SIZE) {
165 argp->end = argp->p + (argp->pagelen>>2);
166 argp->pagelen = 0;
167 } else {
168 argp->end = argp->p + (PAGE_SIZE>>2);
169 argp->pagelen -= PAGE_SIZE;
170 }
171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172 argp->p += XDR_QUADLEN(nbytes - avail);
173 return p;
174 }
175
176 static int zero_clientid(clientid_t *clid)
177 {
178 return (clid->cl_boot == 0) && (clid->cl_id == 0);
179 }
180
181 static int
182 defer_free(struct nfsd4_compoundargs *argp,
183 void (*release)(const void *), void *p)
184 {
185 struct tmpbuf *tb;
186
187 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
188 if (!tb)
189 return -ENOMEM;
190 tb->buf = p;
191 tb->release = release;
192 tb->next = argp->to_free;
193 argp->to_free = tb;
194 return 0;
195 }
196
197 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
198 {
199 if (p == argp->tmp) {
200 p = kmalloc(nbytes, GFP_KERNEL);
201 if (!p)
202 return NULL;
203 memcpy(p, argp->tmp, nbytes);
204 } else {
205 BUG_ON(p != argp->tmpp);
206 argp->tmpp = NULL;
207 }
208 if (defer_free(argp, kfree, p)) {
209 kfree(p);
210 return NULL;
211 } else
212 return (char *)p;
213 }
214
215 static __be32
216 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
217 {
218 u32 bmlen;
219 DECODE_HEAD;
220
221 bmval[0] = 0;
222 bmval[1] = 0;
223 bmval[2] = 0;
224
225 READ_BUF(4);
226 READ32(bmlen);
227 if (bmlen > 1000)
228 goto xdr_error;
229
230 READ_BUF(bmlen << 2);
231 if (bmlen > 0)
232 READ32(bmval[0]);
233 if (bmlen > 1)
234 READ32(bmval[1]);
235 if (bmlen > 2)
236 READ32(bmval[2]);
237
238 DECODE_TAIL;
239 }
240
241 static __be32
242 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
243 struct iattr *iattr, struct nfs4_acl **acl)
244 {
245 int expected_len, len = 0;
246 u32 dummy32;
247 char *buf;
248 int host_err;
249
250 DECODE_HEAD;
251 iattr->ia_valid = 0;
252 if ((status = nfsd4_decode_bitmap(argp, bmval)))
253 return status;
254
255 READ_BUF(4);
256 READ32(expected_len);
257
258 if (bmval[0] & FATTR4_WORD0_SIZE) {
259 READ_BUF(8);
260 len += 8;
261 READ64(iattr->ia_size);
262 iattr->ia_valid |= ATTR_SIZE;
263 }
264 if (bmval[0] & FATTR4_WORD0_ACL) {
265 int nace;
266 struct nfs4_ace *ace;
267
268 READ_BUF(4); len += 4;
269 READ32(nace);
270
271 if (nace > NFS4_ACL_MAX)
272 return nfserr_resource;
273
274 *acl = nfs4_acl_new(nace);
275 if (*acl == NULL) {
276 host_err = -ENOMEM;
277 goto out_nfserr;
278 }
279 defer_free(argp, kfree, *acl);
280
281 (*acl)->naces = nace;
282 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
283 READ_BUF(16); len += 16;
284 READ32(ace->type);
285 READ32(ace->flag);
286 READ32(ace->access_mask);
287 READ32(dummy32);
288 READ_BUF(dummy32);
289 len += XDR_QUADLEN(dummy32) << 2;
290 READMEM(buf, dummy32);
291 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
292 host_err = 0;
293 if (ace->whotype != NFS4_ACL_WHO_NAMED)
294 ace->who = 0;
295 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
296 host_err = nfsd_map_name_to_gid(argp->rqstp,
297 buf, dummy32, &ace->who);
298 else
299 host_err = nfsd_map_name_to_uid(argp->rqstp,
300 buf, dummy32, &ace->who);
301 if (host_err)
302 goto out_nfserr;
303 }
304 } else
305 *acl = NULL;
306 if (bmval[1] & FATTR4_WORD1_MODE) {
307 READ_BUF(4);
308 len += 4;
309 READ32(iattr->ia_mode);
310 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
311 iattr->ia_valid |= ATTR_MODE;
312 }
313 if (bmval[1] & FATTR4_WORD1_OWNER) {
314 READ_BUF(4);
315 len += 4;
316 READ32(dummy32);
317 READ_BUF(dummy32);
318 len += (XDR_QUADLEN(dummy32) << 2);
319 READMEM(buf, dummy32);
320 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
321 goto out_nfserr;
322 iattr->ia_valid |= ATTR_UID;
323 }
324 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
325 READ_BUF(4);
326 len += 4;
327 READ32(dummy32);
328 READ_BUF(dummy32);
329 len += (XDR_QUADLEN(dummy32) << 2);
330 READMEM(buf, dummy32);
331 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
332 goto out_nfserr;
333 iattr->ia_valid |= ATTR_GID;
334 }
335 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
336 READ_BUF(4);
337 len += 4;
338 READ32(dummy32);
339 switch (dummy32) {
340 case NFS4_SET_TO_CLIENT_TIME:
341 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
342 all 32 bits of 'nseconds'. */
343 READ_BUF(12);
344 len += 12;
345 READ32(dummy32);
346 if (dummy32)
347 return nfserr_inval;
348 READ32(iattr->ia_atime.tv_sec);
349 READ32(iattr->ia_atime.tv_nsec);
350 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
351 return nfserr_inval;
352 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
353 break;
354 case NFS4_SET_TO_SERVER_TIME:
355 iattr->ia_valid |= ATTR_ATIME;
356 break;
357 default:
358 goto xdr_error;
359 }
360 }
361 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
362 READ_BUF(4);
363 len += 4;
364 READ32(dummy32);
365 switch (dummy32) {
366 case NFS4_SET_TO_CLIENT_TIME:
367 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
368 all 32 bits of 'nseconds'. */
369 READ_BUF(12);
370 len += 12;
371 READ32(dummy32);
372 if (dummy32)
373 return nfserr_inval;
374 READ32(iattr->ia_mtime.tv_sec);
375 READ32(iattr->ia_mtime.tv_nsec);
376 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
377 return nfserr_inval;
378 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
379 break;
380 case NFS4_SET_TO_SERVER_TIME:
381 iattr->ia_valid |= ATTR_MTIME;
382 break;
383 default:
384 goto xdr_error;
385 }
386 }
387 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
388 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
389 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
390 READ_BUF(expected_len - len);
391 else if (len != expected_len)
392 goto xdr_error;
393
394 DECODE_TAIL;
395
396 out_nfserr:
397 status = nfserrno(host_err);
398 goto out;
399 }
400
401 static __be32
402 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
403 {
404 DECODE_HEAD;
405
406 READ_BUF(sizeof(stateid_t));
407 READ32(sid->si_generation);
408 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
409
410 DECODE_TAIL;
411 }
412
413 static __be32
414 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
415 {
416 DECODE_HEAD;
417
418 READ_BUF(4);
419 READ32(access->ac_req_access);
420
421 DECODE_TAIL;
422 }
423
424 static __be32
425 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
426 {
427 DECODE_HEAD;
428
429 close->cl_stateowner = NULL;
430 READ_BUF(4);
431 READ32(close->cl_seqid);
432 return nfsd4_decode_stateid(argp, &close->cl_stateid);
433
434 DECODE_TAIL;
435 }
436
437
438 static __be32
439 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
440 {
441 DECODE_HEAD;
442
443 READ_BUF(12);
444 READ64(commit->co_offset);
445 READ32(commit->co_count);
446
447 DECODE_TAIL;
448 }
449
450 static __be32
451 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
452 {
453 DECODE_HEAD;
454
455 READ_BUF(4);
456 READ32(create->cr_type);
457 switch (create->cr_type) {
458 case NF4LNK:
459 READ_BUF(4);
460 READ32(create->cr_linklen);
461 READ_BUF(create->cr_linklen);
462 SAVEMEM(create->cr_linkname, create->cr_linklen);
463 break;
464 case NF4BLK:
465 case NF4CHR:
466 READ_BUF(8);
467 READ32(create->cr_specdata1);
468 READ32(create->cr_specdata2);
469 break;
470 case NF4SOCK:
471 case NF4FIFO:
472 case NF4DIR:
473 default:
474 break;
475 }
476
477 READ_BUF(4);
478 READ32(create->cr_namelen);
479 READ_BUF(create->cr_namelen);
480 SAVEMEM(create->cr_name, create->cr_namelen);
481 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
482 return status;
483
484 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
485 &create->cr_acl);
486 if (status)
487 goto out;
488
489 DECODE_TAIL;
490 }
491
492 static inline __be32
493 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
494 {
495 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
496 }
497
498 static inline __be32
499 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
500 {
501 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
502 }
503
504 static __be32
505 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
506 {
507 DECODE_HEAD;
508
509 READ_BUF(4);
510 READ32(link->li_namelen);
511 READ_BUF(link->li_namelen);
512 SAVEMEM(link->li_name, link->li_namelen);
513 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
514 return status;
515
516 DECODE_TAIL;
517 }
518
519 static __be32
520 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
521 {
522 DECODE_HEAD;
523
524 lock->lk_replay_owner = NULL;
525 /*
526 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
527 */
528 READ_BUF(28);
529 READ32(lock->lk_type);
530 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
531 goto xdr_error;
532 READ32(lock->lk_reclaim);
533 READ64(lock->lk_offset);
534 READ64(lock->lk_length);
535 READ32(lock->lk_is_new);
536
537 if (lock->lk_is_new) {
538 READ_BUF(4);
539 READ32(lock->lk_new_open_seqid);
540 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
541 if (status)
542 return status;
543 READ_BUF(8 + sizeof(clientid_t));
544 READ32(lock->lk_new_lock_seqid);
545 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
546 READ32(lock->lk_new_owner.len);
547 READ_BUF(lock->lk_new_owner.len);
548 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
549 } else {
550 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
551 if (status)
552 return status;
553 READ_BUF(4);
554 READ32(lock->lk_old_lock_seqid);
555 }
556
557 DECODE_TAIL;
558 }
559
560 static __be32
561 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
562 {
563 DECODE_HEAD;
564
565 READ_BUF(32);
566 READ32(lockt->lt_type);
567 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
568 goto xdr_error;
569 READ64(lockt->lt_offset);
570 READ64(lockt->lt_length);
571 COPYMEM(&lockt->lt_clientid, 8);
572 READ32(lockt->lt_owner.len);
573 READ_BUF(lockt->lt_owner.len);
574 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
575
576 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
577 return nfserr_inval;
578 DECODE_TAIL;
579 }
580
581 static __be32
582 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
583 {
584 DECODE_HEAD;
585
586 locku->lu_stateowner = NULL;
587 READ_BUF(8);
588 READ32(locku->lu_type);
589 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
590 goto xdr_error;
591 READ32(locku->lu_seqid);
592 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
593 if (status)
594 return status;
595 READ_BUF(16);
596 READ64(locku->lu_offset);
597 READ64(locku->lu_length);
598
599 DECODE_TAIL;
600 }
601
602 static __be32
603 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
604 {
605 DECODE_HEAD;
606
607 READ_BUF(4);
608 READ32(lookup->lo_len);
609 READ_BUF(lookup->lo_len);
610 SAVEMEM(lookup->lo_name, lookup->lo_len);
611 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
612 return status;
613
614 DECODE_TAIL;
615 }
616
617 static __be32
618 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
619 {
620 DECODE_HEAD;
621
622 memset(open->op_bmval, 0, sizeof(open->op_bmval));
623 open->op_iattr.ia_valid = 0;
624 open->op_stateowner = NULL;
625
626 /* seqid, share_access, share_deny, clientid, ownerlen */
627 READ_BUF(16 + sizeof(clientid_t));
628 READ32(open->op_seqid);
629 READ32(open->op_share_access);
630 READ32(open->op_share_deny);
631 COPYMEM(&open->op_clientid, sizeof(clientid_t));
632 READ32(open->op_owner.len);
633
634 /* owner, open_flag */
635 READ_BUF(open->op_owner.len + 4);
636 SAVEMEM(open->op_owner.data, open->op_owner.len);
637 READ32(open->op_create);
638 switch (open->op_create) {
639 case NFS4_OPEN_NOCREATE:
640 break;
641 case NFS4_OPEN_CREATE:
642 READ_BUF(4);
643 READ32(open->op_createmode);
644 switch (open->op_createmode) {
645 case NFS4_CREATE_UNCHECKED:
646 case NFS4_CREATE_GUARDED:
647 status = nfsd4_decode_fattr(argp, open->op_bmval,
648 &open->op_iattr, &open->op_acl);
649 if (status)
650 goto out;
651 break;
652 case NFS4_CREATE_EXCLUSIVE:
653 READ_BUF(8);
654 COPYMEM(open->op_verf.data, 8);
655 break;
656 case NFS4_CREATE_EXCLUSIVE4_1:
657 if (argp->minorversion < 1)
658 goto xdr_error;
659 READ_BUF(8);
660 COPYMEM(open->op_verf.data, 8);
661 status = nfsd4_decode_fattr(argp, open->op_bmval,
662 &open->op_iattr, &open->op_acl);
663 if (status)
664 goto out;
665 break;
666 default:
667 goto xdr_error;
668 }
669 break;
670 default:
671 goto xdr_error;
672 }
673
674 /* open_claim */
675 READ_BUF(4);
676 READ32(open->op_claim_type);
677 switch (open->op_claim_type) {
678 case NFS4_OPEN_CLAIM_NULL:
679 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
680 READ_BUF(4);
681 READ32(open->op_fname.len);
682 READ_BUF(open->op_fname.len);
683 SAVEMEM(open->op_fname.data, open->op_fname.len);
684 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
685 return status;
686 break;
687 case NFS4_OPEN_CLAIM_PREVIOUS:
688 READ_BUF(4);
689 READ32(open->op_delegate_type);
690 break;
691 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
692 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
696 READ32(open->op_fname.len);
697 READ_BUF(open->op_fname.len);
698 SAVEMEM(open->op_fname.data, open->op_fname.len);
699 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
700 return status;
701 break;
702 default:
703 goto xdr_error;
704 }
705
706 DECODE_TAIL;
707 }
708
709 static __be32
710 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
711 {
712 DECODE_HEAD;
713
714 open_conf->oc_stateowner = NULL;
715 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
716 if (status)
717 return status;
718 READ_BUF(4);
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 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
731 if (status)
732 return status;
733 READ_BUF(12);
734 READ32(open_down->od_seqid);
735 READ32(open_down->od_share_access);
736 READ32(open_down->od_share_deny);
737
738 DECODE_TAIL;
739 }
740
741 static __be32
742 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
743 {
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(putfh->pf_fhlen);
748 if (putfh->pf_fhlen > NFS4_FHSIZE)
749 goto xdr_error;
750 READ_BUF(putfh->pf_fhlen);
751 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
752
753 DECODE_TAIL;
754 }
755
756 static __be32
757 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
758 {
759 DECODE_HEAD;
760
761 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
762 if (status)
763 return status;
764 READ_BUF(12);
765 READ64(read->rd_offset);
766 READ32(read->rd_length);
767
768 DECODE_TAIL;
769 }
770
771 static __be32
772 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
773 {
774 DECODE_HEAD;
775
776 READ_BUF(24);
777 READ64(readdir->rd_cookie);
778 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
779 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
780 READ32(readdir->rd_maxcount);
781 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
782 goto out;
783
784 DECODE_TAIL;
785 }
786
787 static __be32
788 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
789 {
790 DECODE_HEAD;
791
792 READ_BUF(4);
793 READ32(remove->rm_namelen);
794 READ_BUF(remove->rm_namelen);
795 SAVEMEM(remove->rm_name, remove->rm_namelen);
796 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
797 return status;
798
799 DECODE_TAIL;
800 }
801
802 static __be32
803 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
804 {
805 DECODE_HEAD;
806
807 READ_BUF(4);
808 READ32(rename->rn_snamelen);
809 READ_BUF(rename->rn_snamelen + 4);
810 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
811 READ32(rename->rn_tnamelen);
812 READ_BUF(rename->rn_tnamelen);
813 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
814 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
815 return status;
816 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
817 return status;
818
819 DECODE_TAIL;
820 }
821
822 static __be32
823 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
824 {
825 DECODE_HEAD;
826
827 READ_BUF(sizeof(clientid_t));
828 COPYMEM(clientid, sizeof(clientid_t));
829
830 DECODE_TAIL;
831 }
832
833 static __be32
834 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
835 struct nfsd4_secinfo *secinfo)
836 {
837 DECODE_HEAD;
838
839 READ_BUF(4);
840 READ32(secinfo->si_namelen);
841 READ_BUF(secinfo->si_namelen);
842 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
843 status = check_filename(secinfo->si_name, secinfo->si_namelen,
844 nfserr_noent);
845 if (status)
846 return status;
847 DECODE_TAIL;
848 }
849
850 static __be32
851 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
852 struct nfsd4_secinfo_no_name *sin)
853 {
854 DECODE_HEAD;
855
856 READ_BUF(4);
857 READ32(sin->sin_style);
858 DECODE_TAIL;
859 }
860
861 static __be32
862 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
863 {
864 __be32 status;
865
866 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
867 if (status)
868 return status;
869 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
870 &setattr->sa_acl);
871 }
872
873 static __be32
874 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
875 {
876 DECODE_HEAD;
877
878 READ_BUF(12);
879 COPYMEM(setclientid->se_verf.data, 8);
880 READ32(setclientid->se_namelen);
881
882 READ_BUF(setclientid->se_namelen + 8);
883 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
884 READ32(setclientid->se_callback_prog);
885 READ32(setclientid->se_callback_netid_len);
886
887 READ_BUF(setclientid->se_callback_netid_len + 4);
888 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
889 READ32(setclientid->se_callback_addr_len);
890
891 READ_BUF(setclientid->se_callback_addr_len + 4);
892 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
893 READ32(setclientid->se_callback_ident);
894
895 DECODE_TAIL;
896 }
897
898 static __be32
899 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
900 {
901 DECODE_HEAD;
902
903 READ_BUF(8 + sizeof(nfs4_verifier));
904 COPYMEM(&scd_c->sc_clientid, 8);
905 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
906
907 DECODE_TAIL;
908 }
909
910 /* Also used for NVERIFY */
911 static __be32
912 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
913 {
914 #if 0
915 struct nfsd4_compoundargs save = {
916 .p = argp->p,
917 .end = argp->end,
918 .rqstp = argp->rqstp,
919 };
920 u32 ve_bmval[2];
921 struct iattr ve_iattr; /* request */
922 struct nfs4_acl *ve_acl; /* request */
923 #endif
924 DECODE_HEAD;
925
926 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
927 goto out;
928
929 /* For convenience's sake, we compare raw xdr'd attributes in
930 * nfsd4_proc_verify; however we still decode here just to return
931 * correct error in case of bad xdr. */
932 #if 0
933 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
934 if (status == nfserr_inval) {
935 status = nfserrno(status);
936 goto out;
937 }
938 #endif
939 READ_BUF(4);
940 READ32(verify->ve_attrlen);
941 READ_BUF(verify->ve_attrlen);
942 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
943
944 DECODE_TAIL;
945 }
946
947 static __be32
948 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
949 {
950 int avail;
951 int v;
952 int len;
953 DECODE_HEAD;
954
955 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
956 if (status)
957 return status;
958 READ_BUF(16);
959 READ64(write->wr_offset);
960 READ32(write->wr_stable_how);
961 if (write->wr_stable_how > 2)
962 goto xdr_error;
963 READ32(write->wr_buflen);
964
965 /* Sorry .. no magic macros for this.. *
966 * READ_BUF(write->wr_buflen);
967 * SAVEMEM(write->wr_buf, write->wr_buflen);
968 */
969 avail = (char*)argp->end - (char*)argp->p;
970 if (avail + argp->pagelen < write->wr_buflen) {
971 dprintk("NFSD: xdr error (%s:%d)\n",
972 __FILE__, __LINE__);
973 goto xdr_error;
974 }
975 argp->rqstp->rq_vec[0].iov_base = p;
976 argp->rqstp->rq_vec[0].iov_len = avail;
977 v = 0;
978 len = write->wr_buflen;
979 while (len > argp->rqstp->rq_vec[v].iov_len) {
980 len -= argp->rqstp->rq_vec[v].iov_len;
981 v++;
982 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
983 argp->pagelist++;
984 if (argp->pagelen >= PAGE_SIZE) {
985 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
986 argp->pagelen -= PAGE_SIZE;
987 } else {
988 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
989 argp->pagelen -= len;
990 }
991 }
992 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
993 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
994 argp->rqstp->rq_vec[v].iov_len = len;
995 write->wr_vlen = v+1;
996
997 DECODE_TAIL;
998 }
999
1000 static __be32
1001 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1002 {
1003 DECODE_HEAD;
1004
1005 READ_BUF(12);
1006 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1007 READ32(rlockowner->rl_owner.len);
1008 READ_BUF(rlockowner->rl_owner.len);
1009 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1010
1011 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1012 return nfserr_inval;
1013 DECODE_TAIL;
1014 }
1015
1016 static __be32
1017 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1018 struct nfsd4_exchange_id *exid)
1019 {
1020 int dummy, tmp;
1021 DECODE_HEAD;
1022
1023 READ_BUF(NFS4_VERIFIER_SIZE);
1024 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1025
1026 READ_BUF(4);
1027 READ32(exid->clname.len);
1028
1029 READ_BUF(exid->clname.len);
1030 SAVEMEM(exid->clname.data, exid->clname.len);
1031
1032 READ_BUF(4);
1033 READ32(exid->flags);
1034
1035 /* Ignore state_protect4_a */
1036 READ_BUF(4);
1037 READ32(exid->spa_how);
1038 switch (exid->spa_how) {
1039 case SP4_NONE:
1040 break;
1041 case SP4_MACH_CRED:
1042 /* spo_must_enforce */
1043 READ_BUF(4);
1044 READ32(dummy);
1045 READ_BUF(dummy * 4);
1046 p += dummy;
1047
1048 /* spo_must_allow */
1049 READ_BUF(4);
1050 READ32(dummy);
1051 READ_BUF(dummy * 4);
1052 p += dummy;
1053 break;
1054 case SP4_SSV:
1055 /* ssp_ops */
1056 READ_BUF(4);
1057 READ32(dummy);
1058 READ_BUF(dummy * 4);
1059 p += dummy;
1060
1061 READ_BUF(4);
1062 READ32(dummy);
1063 READ_BUF(dummy * 4);
1064 p += dummy;
1065
1066 /* ssp_hash_algs<> */
1067 READ_BUF(4);
1068 READ32(tmp);
1069 while (tmp--) {
1070 READ_BUF(4);
1071 READ32(dummy);
1072 READ_BUF(dummy);
1073 p += XDR_QUADLEN(dummy);
1074 }
1075
1076 /* ssp_encr_algs<> */
1077 READ_BUF(4);
1078 READ32(tmp);
1079 while (tmp--) {
1080 READ_BUF(4);
1081 READ32(dummy);
1082 READ_BUF(dummy);
1083 p += XDR_QUADLEN(dummy);
1084 }
1085
1086 /* ssp_window and ssp_num_gss_handles */
1087 READ_BUF(8);
1088 READ32(dummy);
1089 READ32(dummy);
1090 break;
1091 default:
1092 goto xdr_error;
1093 }
1094
1095 /* Ignore Implementation ID */
1096 READ_BUF(4); /* nfs_impl_id4 array length */
1097 READ32(dummy);
1098
1099 if (dummy > 1)
1100 goto xdr_error;
1101
1102 if (dummy == 1) {
1103 /* nii_domain */
1104 READ_BUF(4);
1105 READ32(dummy);
1106 READ_BUF(dummy);
1107 p += XDR_QUADLEN(dummy);
1108
1109 /* nii_name */
1110 READ_BUF(4);
1111 READ32(dummy);
1112 READ_BUF(dummy);
1113 p += XDR_QUADLEN(dummy);
1114
1115 /* nii_date */
1116 READ_BUF(12);
1117 p += 3;
1118 }
1119 DECODE_TAIL;
1120 }
1121
1122 static __be32
1123 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1124 struct nfsd4_create_session *sess)
1125 {
1126 DECODE_HEAD;
1127
1128 u32 dummy;
1129 char *machine_name;
1130 int i;
1131 int nr_secflavs;
1132
1133 READ_BUF(16);
1134 COPYMEM(&sess->clientid, 8);
1135 READ32(sess->seqid);
1136 READ32(sess->flags);
1137
1138 /* Fore channel attrs */
1139 READ_BUF(28);
1140 READ32(dummy); /* headerpadsz is always 0 */
1141 READ32(sess->fore_channel.maxreq_sz);
1142 READ32(sess->fore_channel.maxresp_sz);
1143 READ32(sess->fore_channel.maxresp_cached);
1144 READ32(sess->fore_channel.maxops);
1145 READ32(sess->fore_channel.maxreqs);
1146 READ32(sess->fore_channel.nr_rdma_attrs);
1147 if (sess->fore_channel.nr_rdma_attrs == 1) {
1148 READ_BUF(4);
1149 READ32(sess->fore_channel.rdma_attrs);
1150 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1151 dprintk("Too many fore channel attr bitmaps!\n");
1152 goto xdr_error;
1153 }
1154
1155 /* Back channel attrs */
1156 READ_BUF(28);
1157 READ32(dummy); /* headerpadsz is always 0 */
1158 READ32(sess->back_channel.maxreq_sz);
1159 READ32(sess->back_channel.maxresp_sz);
1160 READ32(sess->back_channel.maxresp_cached);
1161 READ32(sess->back_channel.maxops);
1162 READ32(sess->back_channel.maxreqs);
1163 READ32(sess->back_channel.nr_rdma_attrs);
1164 if (sess->back_channel.nr_rdma_attrs == 1) {
1165 READ_BUF(4);
1166 READ32(sess->back_channel.rdma_attrs);
1167 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1168 dprintk("Too many back channel attr bitmaps!\n");
1169 goto xdr_error;
1170 }
1171
1172 READ_BUF(8);
1173 READ32(sess->callback_prog);
1174
1175 /* callback_sec_params4 */
1176 READ32(nr_secflavs);
1177 for (i = 0; i < nr_secflavs; ++i) {
1178 READ_BUF(4);
1179 READ32(dummy);
1180 switch (dummy) {
1181 case RPC_AUTH_NULL:
1182 /* Nothing to read */
1183 break;
1184 case RPC_AUTH_UNIX:
1185 READ_BUF(8);
1186 /* stamp */
1187 READ32(dummy);
1188
1189 /* machine name */
1190 READ32(dummy);
1191 READ_BUF(dummy);
1192 SAVEMEM(machine_name, dummy);
1193
1194 /* uid, gid */
1195 READ_BUF(8);
1196 READ32(sess->uid);
1197 READ32(sess->gid);
1198
1199 /* more gids */
1200 READ_BUF(4);
1201 READ32(dummy);
1202 READ_BUF(dummy * 4);
1203 for (i = 0; i < dummy; ++i)
1204 READ32(dummy);
1205 break;
1206 case RPC_AUTH_GSS:
1207 dprintk("RPC_AUTH_GSS callback secflavor "
1208 "not supported!\n");
1209 READ_BUF(8);
1210 /* gcbp_service */
1211 READ32(dummy);
1212 /* gcbp_handle_from_server */
1213 READ32(dummy);
1214 READ_BUF(dummy);
1215 p += XDR_QUADLEN(dummy);
1216 /* gcbp_handle_from_client */
1217 READ_BUF(4);
1218 READ32(dummy);
1219 READ_BUF(dummy);
1220 p += XDR_QUADLEN(dummy);
1221 break;
1222 default:
1223 dprintk("Illegal callback secflavor\n");
1224 return nfserr_inval;
1225 }
1226 }
1227 DECODE_TAIL;
1228 }
1229
1230 static __be32
1231 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1232 struct nfsd4_destroy_session *destroy_session)
1233 {
1234 DECODE_HEAD;
1235 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1236 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1237
1238 DECODE_TAIL;
1239 }
1240
1241 static __be32
1242 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1243 struct nfsd4_sequence *seq)
1244 {
1245 DECODE_HEAD;
1246
1247 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1248 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1249 READ32(seq->seqid);
1250 READ32(seq->slotid);
1251 READ32(seq->maxslots);
1252 READ32(seq->cachethis);
1253
1254 DECODE_TAIL;
1255 }
1256
1257 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1258 {
1259 DECODE_HEAD;
1260
1261 READ_BUF(4);
1262 READ32(rc->rca_one_fs);
1263
1264 DECODE_TAIL;
1265 }
1266
1267 static __be32
1268 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1269 {
1270 return nfs_ok;
1271 }
1272
1273 static __be32
1274 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1275 {
1276 return nfserr_notsupp;
1277 }
1278
1279 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1280
1281 static nfsd4_dec nfsd4_dec_ops[] = {
1282 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1283 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1284 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1285 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1286 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1287 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1288 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1289 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1290 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1291 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1292 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1293 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1294 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1295 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1296 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1297 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1298 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1299 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1300 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1301 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1302 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1303 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1304 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1305 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1306 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1307 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1308 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1309 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1310 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1312 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1313 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1314 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1315 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1316 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1317 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1318 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1319 };
1320
1321 static nfsd4_dec nfsd41_dec_ops[] = {
1322 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1323 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1324 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1325 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1326 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1327 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1328 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1329 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1330 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1331 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1332 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1333 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1334 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1335 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1336 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1337 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1338 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1341 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1342 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1344 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1345 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1346 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1347 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1348 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1349 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1350 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1351 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1352 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1353 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1354 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1356 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1357 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1358 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1359
1360 /* new operations for NFSv4.1 */
1361 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1363 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1364 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1365 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1366 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1367 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1368 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1369 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1370 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1372 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1373 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1374 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1375 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1378 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1379 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1380 };
1381
1382 struct nfsd4_minorversion_ops {
1383 nfsd4_dec *decoders;
1384 int nops;
1385 };
1386
1387 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1388 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1389 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1390 };
1391
1392 static __be32
1393 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1394 {
1395 DECODE_HEAD;
1396 struct nfsd4_op *op;
1397 struct nfsd4_minorversion_ops *ops;
1398 int i;
1399
1400 /*
1401 * XXX: According to spec, we should check the tag
1402 * for UTF-8 compliance. I'm postponing this for
1403 * now because it seems that some clients do use
1404 * binary tags.
1405 */
1406 READ_BUF(4);
1407 READ32(argp->taglen);
1408 READ_BUF(argp->taglen + 8);
1409 SAVEMEM(argp->tag, argp->taglen);
1410 READ32(argp->minorversion);
1411 READ32(argp->opcnt);
1412
1413 if (argp->taglen > NFSD4_MAX_TAGLEN)
1414 goto xdr_error;
1415 if (argp->opcnt > 100)
1416 goto xdr_error;
1417
1418 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1419 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1420 if (!argp->ops) {
1421 argp->ops = argp->iops;
1422 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1423 goto xdr_error;
1424 }
1425 }
1426
1427 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1428 argp->opcnt = 0;
1429
1430 ops = &nfsd4_minorversion[argp->minorversion];
1431 for (i = 0; i < argp->opcnt; i++) {
1432 op = &argp->ops[i];
1433 op->replay = NULL;
1434
1435 /*
1436 * We can't use READ_BUF() here because we need to handle
1437 * a missing opcode as an OP_WRITE + 1. So we need to check
1438 * to see if we're truly at the end of our buffer or if there
1439 * is another page we need to flip to.
1440 */
1441
1442 if (argp->p == argp->end) {
1443 if (argp->pagelen < 4) {
1444 /* There isn't an opcode still on the wire */
1445 op->opnum = OP_WRITE + 1;
1446 op->status = nfserr_bad_xdr;
1447 argp->opcnt = i+1;
1448 break;
1449 }
1450
1451 /*
1452 * False alarm. We just hit a page boundary, but there
1453 * is still data available. Move pointer across page
1454 * boundary. *snip from READ_BUF*
1455 */
1456 argp->p = page_address(argp->pagelist[0]);
1457 argp->pagelist++;
1458 if (argp->pagelen < PAGE_SIZE) {
1459 argp->end = argp->p + (argp->pagelen>>2);
1460 argp->pagelen = 0;
1461 } else {
1462 argp->end = argp->p + (PAGE_SIZE>>2);
1463 argp->pagelen -= PAGE_SIZE;
1464 }
1465 }
1466 op->opnum = ntohl(*argp->p++);
1467
1468 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1469 op->status = ops->decoders[op->opnum](argp, &op->u);
1470 else {
1471 op->opnum = OP_ILLEGAL;
1472 op->status = nfserr_op_illegal;
1473 }
1474
1475 if (op->status) {
1476 argp->opcnt = i+1;
1477 break;
1478 }
1479 }
1480
1481 DECODE_TAIL;
1482 }
1483
1484 #define WRITE32(n) *p++ = htonl(n)
1485 #define WRITE64(n) do { \
1486 *p++ = htonl((u32)((n) >> 32)); \
1487 *p++ = htonl((u32)(n)); \
1488 } while (0)
1489 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1490 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1491 memcpy(p, ptr, nbytes); \
1492 p += XDR_QUADLEN(nbytes); \
1493 }} while (0)
1494
1495 static void write32(__be32 **p, u32 n)
1496 {
1497 *(*p)++ = n;
1498 }
1499
1500 static void write64(__be32 **p, u64 n)
1501 {
1502 write32(p, (u32)(n >> 32));
1503 write32(p, (u32)n);
1504 }
1505
1506 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1507 {
1508 if (IS_I_VERSION(inode)) {
1509 write64(p, inode->i_version);
1510 } else {
1511 write32(p, stat->ctime.tv_sec);
1512 write32(p, stat->ctime.tv_nsec);
1513 }
1514 }
1515
1516 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1517 {
1518 write32(p, c->atomic);
1519 if (c->change_supported) {
1520 write64(p, c->before_change);
1521 write64(p, c->after_change);
1522 } else {
1523 write32(p, c->before_ctime_sec);
1524 write32(p, c->before_ctime_nsec);
1525 write32(p, c->after_ctime_sec);
1526 write32(p, c->after_ctime_nsec);
1527 }
1528 }
1529
1530 #define RESERVE_SPACE(nbytes) do { \
1531 p = resp->p; \
1532 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1533 } while (0)
1534 #define ADJUST_ARGS() resp->p = p
1535
1536 /*
1537 * Header routine to setup seqid operation replay cache
1538 */
1539 #define ENCODE_SEQID_OP_HEAD \
1540 __be32 *save; \
1541 \
1542 save = resp->p;
1543
1544 /*
1545 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1546 * is where sequence id's are incremented, and the replay cache is filled.
1547 * Note that we increment sequence id's here, at the last moment, so we're sure
1548 * we know whether the error to be returned is a sequence id mutating error.
1549 */
1550
1551 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1552 if (seqid_mutating_err(nfserr) && stateowner) { \
1553 stateowner->so_seqid++; \
1554 stateowner->so_replay.rp_status = nfserr; \
1555 stateowner->so_replay.rp_buflen = \
1556 (((char *)(resp)->p - (char *)save)); \
1557 memcpy(stateowner->so_replay.rp_buf, save, \
1558 stateowner->so_replay.rp_buflen); \
1559 } } while (0);
1560
1561 /* Encode as an array of strings the string given with components
1562 * separated @sep.
1563 */
1564 static __be32 nfsd4_encode_components(char sep, char *components,
1565 __be32 **pp, int *buflen)
1566 {
1567 __be32 *p = *pp;
1568 __be32 *countp = p;
1569 int strlen, count=0;
1570 char *str, *end;
1571
1572 dprintk("nfsd4_encode_components(%s)\n", components);
1573 if ((*buflen -= 4) < 0)
1574 return nfserr_resource;
1575 WRITE32(0); /* We will fill this in with @count later */
1576 end = str = components;
1577 while (*end) {
1578 for (; *end && (*end != sep); end++)
1579 ; /* Point to end of component */
1580 strlen = end - str;
1581 if (strlen) {
1582 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1583 return nfserr_resource;
1584 WRITE32(strlen);
1585 WRITEMEM(str, strlen);
1586 count++;
1587 }
1588 else
1589 end++;
1590 str = end;
1591 }
1592 *pp = p;
1593 p = countp;
1594 WRITE32(count);
1595 return 0;
1596 }
1597
1598 /*
1599 * encode a location element of a fs_locations structure
1600 */
1601 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1602 __be32 **pp, int *buflen)
1603 {
1604 __be32 status;
1605 __be32 *p = *pp;
1606
1607 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1608 if (status)
1609 return status;
1610 status = nfsd4_encode_components('/', location->path, &p, buflen);
1611 if (status)
1612 return status;
1613 *pp = p;
1614 return 0;
1615 }
1616
1617 /*
1618 * Return the path to an export point in the pseudo filesystem namespace
1619 * Returned string is safe to use as long as the caller holds a reference
1620 * to @exp.
1621 */
1622 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1623 {
1624 struct svc_fh tmp_fh;
1625 char *path = NULL, *rootpath;
1626 size_t rootlen;
1627
1628 fh_init(&tmp_fh, NFS4_FHSIZE);
1629 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1630 if (*stat)
1631 return NULL;
1632 rootpath = tmp_fh.fh_export->ex_pathname;
1633
1634 path = exp->ex_pathname;
1635
1636 rootlen = strlen(rootpath);
1637 if (strncmp(path, rootpath, rootlen)) {
1638 dprintk("nfsd: fs_locations failed;"
1639 "%s is not contained in %s\n", path, rootpath);
1640 *stat = nfserr_notsupp;
1641 path = NULL;
1642 goto out;
1643 }
1644 path += rootlen;
1645 out:
1646 fh_put(&tmp_fh);
1647 return path;
1648 }
1649
1650 /*
1651 * encode a fs_locations structure
1652 */
1653 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1654 struct svc_export *exp,
1655 __be32 **pp, int *buflen)
1656 {
1657 __be32 status;
1658 int i;
1659 __be32 *p = *pp;
1660 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1661 char *root = nfsd4_path(rqstp, exp, &status);
1662
1663 if (status)
1664 return status;
1665 status = nfsd4_encode_components('/', root, &p, buflen);
1666 if (status)
1667 return status;
1668 if ((*buflen -= 4) < 0)
1669 return nfserr_resource;
1670 WRITE32(fslocs->locations_count);
1671 for (i=0; i<fslocs->locations_count; i++) {
1672 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1673 &p, buflen);
1674 if (status)
1675 return status;
1676 }
1677 *pp = p;
1678 return 0;
1679 }
1680
1681 static u32 nfs4_ftypes[16] = {
1682 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1683 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1684 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1685 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1686 };
1687
1688 static __be32
1689 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1690 __be32 **p, int *buflen)
1691 {
1692 int status;
1693
1694 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1695 return nfserr_resource;
1696 if (whotype != NFS4_ACL_WHO_NAMED)
1697 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1698 else if (group)
1699 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1700 else
1701 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1702 if (status < 0)
1703 return nfserrno(status);
1704 *p = xdr_encode_opaque(*p, NULL, status);
1705 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1706 BUG_ON(*buflen < 0);
1707 return 0;
1708 }
1709
1710 static inline __be32
1711 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1712 {
1713 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1714 }
1715
1716 static inline __be32
1717 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1718 {
1719 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1720 }
1721
1722 static inline __be32
1723 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1724 __be32 **p, int *buflen)
1725 {
1726 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1727 }
1728
1729 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1730 FATTR4_WORD0_RDATTR_ERROR)
1731 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1732
1733 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1734 {
1735 /* As per referral draft: */
1736 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1737 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1738 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1739 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1740 *rdattr_err = NFSERR_MOVED;
1741 else
1742 return nfserr_moved;
1743 }
1744 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1745 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1746 return 0;
1747 }
1748
1749 /*
1750 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1751 * ourselves.
1752 *
1753 * @countp is the buffer size in _words_; upon successful return this becomes
1754 * replaced with the number of words written.
1755 */
1756 __be32
1757 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1758 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1759 struct svc_rqst *rqstp, int ignore_crossmnt)
1760 {
1761 u32 bmval0 = bmval[0];
1762 u32 bmval1 = bmval[1];
1763 u32 bmval2 = bmval[2];
1764 struct kstat stat;
1765 struct svc_fh tempfh;
1766 struct kstatfs statfs;
1767 int buflen = *countp << 2;
1768 __be32 *attrlenp;
1769 u32 dummy;
1770 u64 dummy64;
1771 u32 rdattr_err = 0;
1772 __be32 *p = buffer;
1773 __be32 status;
1774 int err;
1775 int aclsupport = 0;
1776 struct nfs4_acl *acl = NULL;
1777 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1778 u32 minorversion = resp->cstate.minorversion;
1779 struct path path = {
1780 .mnt = exp->ex_path.mnt,
1781 .dentry = dentry,
1782 };
1783
1784 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1785 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1786 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1787 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1788
1789 if (exp->ex_fslocs.migrated) {
1790 BUG_ON(bmval[2]);
1791 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1792 if (status)
1793 goto out;
1794 }
1795
1796 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1797 if (err)
1798 goto out_nfserr;
1799 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1800 FATTR4_WORD0_MAXNAME)) ||
1801 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1802 FATTR4_WORD1_SPACE_TOTAL))) {
1803 err = vfs_statfs(&path, &statfs);
1804 if (err)
1805 goto out_nfserr;
1806 }
1807 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1808 fh_init(&tempfh, NFS4_FHSIZE);
1809 status = fh_compose(&tempfh, exp, dentry, NULL);
1810 if (status)
1811 goto out;
1812 fhp = &tempfh;
1813 }
1814 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1815 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1816 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1817 aclsupport = (err == 0);
1818 if (bmval0 & FATTR4_WORD0_ACL) {
1819 if (err == -EOPNOTSUPP)
1820 bmval0 &= ~FATTR4_WORD0_ACL;
1821 else if (err == -EINVAL) {
1822 status = nfserr_attrnotsupp;
1823 goto out;
1824 } else if (err != 0)
1825 goto out_nfserr;
1826 }
1827 }
1828
1829 if (bmval2) {
1830 if ((buflen -= 16) < 0)
1831 goto out_resource;
1832 WRITE32(3);
1833 WRITE32(bmval0);
1834 WRITE32(bmval1);
1835 WRITE32(bmval2);
1836 } else if (bmval1) {
1837 if ((buflen -= 12) < 0)
1838 goto out_resource;
1839 WRITE32(2);
1840 WRITE32(bmval0);
1841 WRITE32(bmval1);
1842 } else {
1843 if ((buflen -= 8) < 0)
1844 goto out_resource;
1845 WRITE32(1);
1846 WRITE32(bmval0);
1847 }
1848 attrlenp = p++; /* to be backfilled later */
1849
1850 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1851 u32 word0 = nfsd_suppattrs0(minorversion);
1852 u32 word1 = nfsd_suppattrs1(minorversion);
1853 u32 word2 = nfsd_suppattrs2(minorversion);
1854
1855 if (!aclsupport)
1856 word0 &= ~FATTR4_WORD0_ACL;
1857 if (!word2) {
1858 if ((buflen -= 12) < 0)
1859 goto out_resource;
1860 WRITE32(2);
1861 WRITE32(word0);
1862 WRITE32(word1);
1863 } else {
1864 if ((buflen -= 16) < 0)
1865 goto out_resource;
1866 WRITE32(3);
1867 WRITE32(word0);
1868 WRITE32(word1);
1869 WRITE32(word2);
1870 }
1871 }
1872 if (bmval0 & FATTR4_WORD0_TYPE) {
1873 if ((buflen -= 4) < 0)
1874 goto out_resource;
1875 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1876 if (dummy == NF4BAD)
1877 goto out_serverfault;
1878 WRITE32(dummy);
1879 }
1880 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1881 if ((buflen -= 4) < 0)
1882 goto out_resource;
1883 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1884 WRITE32(NFS4_FH_PERSISTENT);
1885 else
1886 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1887 }
1888 if (bmval0 & FATTR4_WORD0_CHANGE) {
1889 if ((buflen -= 8) < 0)
1890 goto out_resource;
1891 write_change(&p, &stat, dentry->d_inode);
1892 }
1893 if (bmval0 & FATTR4_WORD0_SIZE) {
1894 if ((buflen -= 8) < 0)
1895 goto out_resource;
1896 WRITE64(stat.size);
1897 }
1898 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1899 if ((buflen -= 4) < 0)
1900 goto out_resource;
1901 WRITE32(1);
1902 }
1903 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1904 if ((buflen -= 4) < 0)
1905 goto out_resource;
1906 WRITE32(1);
1907 }
1908 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1909 if ((buflen -= 4) < 0)
1910 goto out_resource;
1911 WRITE32(0);
1912 }
1913 if (bmval0 & FATTR4_WORD0_FSID) {
1914 if ((buflen -= 16) < 0)
1915 goto out_resource;
1916 if (exp->ex_fslocs.migrated) {
1917 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1918 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1919 } else switch(fsid_source(fhp)) {
1920 case FSIDSOURCE_FSID:
1921 WRITE64((u64)exp->ex_fsid);
1922 WRITE64((u64)0);
1923 break;
1924 case FSIDSOURCE_DEV:
1925 WRITE32(0);
1926 WRITE32(MAJOR(stat.dev));
1927 WRITE32(0);
1928 WRITE32(MINOR(stat.dev));
1929 break;
1930 case FSIDSOURCE_UUID:
1931 WRITEMEM(exp->ex_uuid, 16);
1932 break;
1933 }
1934 }
1935 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1936 if ((buflen -= 4) < 0)
1937 goto out_resource;
1938 WRITE32(0);
1939 }
1940 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1941 if ((buflen -= 4) < 0)
1942 goto out_resource;
1943 WRITE32(nfsd4_lease);
1944 }
1945 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1946 if ((buflen -= 4) < 0)
1947 goto out_resource;
1948 WRITE32(rdattr_err);
1949 }
1950 if (bmval0 & FATTR4_WORD0_ACL) {
1951 struct nfs4_ace *ace;
1952
1953 if (acl == NULL) {
1954 if ((buflen -= 4) < 0)
1955 goto out_resource;
1956
1957 WRITE32(0);
1958 goto out_acl;
1959 }
1960 if ((buflen -= 4) < 0)
1961 goto out_resource;
1962 WRITE32(acl->naces);
1963
1964 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1965 if ((buflen -= 4*3) < 0)
1966 goto out_resource;
1967 WRITE32(ace->type);
1968 WRITE32(ace->flag);
1969 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1970 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1971 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1972 &p, &buflen);
1973 if (status == nfserr_resource)
1974 goto out_resource;
1975 if (status)
1976 goto out;
1977 }
1978 }
1979 out_acl:
1980 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1981 if ((buflen -= 4) < 0)
1982 goto out_resource;
1983 WRITE32(aclsupport ?
1984 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1985 }
1986 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1987 if ((buflen -= 4) < 0)
1988 goto out_resource;
1989 WRITE32(1);
1990 }
1991 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1992 if ((buflen -= 4) < 0)
1993 goto out_resource;
1994 WRITE32(1);
1995 }
1996 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1997 if ((buflen -= 4) < 0)
1998 goto out_resource;
1999 WRITE32(1);
2000 }
2001 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2002 if ((buflen -= 4) < 0)
2003 goto out_resource;
2004 WRITE32(1);
2005 }
2006 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2007 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2008 if (buflen < 0)
2009 goto out_resource;
2010 WRITE32(fhp->fh_handle.fh_size);
2011 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2012 }
2013 if (bmval0 & FATTR4_WORD0_FILEID) {
2014 if ((buflen -= 8) < 0)
2015 goto out_resource;
2016 WRITE64(stat.ino);
2017 }
2018 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2019 if ((buflen -= 8) < 0)
2020 goto out_resource;
2021 WRITE64((u64) statfs.f_ffree);
2022 }
2023 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2024 if ((buflen -= 8) < 0)
2025 goto out_resource;
2026 WRITE64((u64) statfs.f_ffree);
2027 }
2028 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2029 if ((buflen -= 8) < 0)
2030 goto out_resource;
2031 WRITE64((u64) statfs.f_files);
2032 }
2033 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2034 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2035 if (status == nfserr_resource)
2036 goto out_resource;
2037 if (status)
2038 goto out;
2039 }
2040 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2041 if ((buflen -= 4) < 0)
2042 goto out_resource;
2043 WRITE32(1);
2044 }
2045 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2046 if ((buflen -= 8) < 0)
2047 goto out_resource;
2048 WRITE64(~(u64)0);
2049 }
2050 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2051 if ((buflen -= 4) < 0)
2052 goto out_resource;
2053 WRITE32(255);
2054 }
2055 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2056 if ((buflen -= 4) < 0)
2057 goto out_resource;
2058 WRITE32(statfs.f_namelen);
2059 }
2060 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2061 if ((buflen -= 8) < 0)
2062 goto out_resource;
2063 WRITE64((u64) svc_max_payload(rqstp));
2064 }
2065 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2066 if ((buflen -= 8) < 0)
2067 goto out_resource;
2068 WRITE64((u64) svc_max_payload(rqstp));
2069 }
2070 if (bmval1 & FATTR4_WORD1_MODE) {
2071 if ((buflen -= 4) < 0)
2072 goto out_resource;
2073 WRITE32(stat.mode & S_IALLUGO);
2074 }
2075 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2076 if ((buflen -= 4) < 0)
2077 goto out_resource;
2078 WRITE32(1);
2079 }
2080 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2081 if ((buflen -= 4) < 0)
2082 goto out_resource;
2083 WRITE32(stat.nlink);
2084 }
2085 if (bmval1 & FATTR4_WORD1_OWNER) {
2086 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2087 if (status == nfserr_resource)
2088 goto out_resource;
2089 if (status)
2090 goto out;
2091 }
2092 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2093 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2094 if (status == nfserr_resource)
2095 goto out_resource;
2096 if (status)
2097 goto out;
2098 }
2099 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2100 if ((buflen -= 8) < 0)
2101 goto out_resource;
2102 WRITE32((u32) MAJOR(stat.rdev));
2103 WRITE32((u32) MINOR(stat.rdev));
2104 }
2105 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2106 if ((buflen -= 8) < 0)
2107 goto out_resource;
2108 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2109 WRITE64(dummy64);
2110 }
2111 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2112 if ((buflen -= 8) < 0)
2113 goto out_resource;
2114 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2115 WRITE64(dummy64);
2116 }
2117 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2118 if ((buflen -= 8) < 0)
2119 goto out_resource;
2120 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2121 WRITE64(dummy64);
2122 }
2123 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2124 if ((buflen -= 8) < 0)
2125 goto out_resource;
2126 dummy64 = (u64)stat.blocks << 9;
2127 WRITE64(dummy64);
2128 }
2129 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2130 if ((buflen -= 12) < 0)
2131 goto out_resource;
2132 WRITE32(0);
2133 WRITE32(stat.atime.tv_sec);
2134 WRITE32(stat.atime.tv_nsec);
2135 }
2136 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2137 if ((buflen -= 12) < 0)
2138 goto out_resource;
2139 WRITE32(0);
2140 WRITE32(1);
2141 WRITE32(0);
2142 }
2143 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2144 if ((buflen -= 12) < 0)
2145 goto out_resource;
2146 WRITE32(0);
2147 WRITE32(stat.ctime.tv_sec);
2148 WRITE32(stat.ctime.tv_nsec);
2149 }
2150 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2151 if ((buflen -= 12) < 0)
2152 goto out_resource;
2153 WRITE32(0);
2154 WRITE32(stat.mtime.tv_sec);
2155 WRITE32(stat.mtime.tv_nsec);
2156 }
2157 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2158 if ((buflen -= 8) < 0)
2159 goto out_resource;
2160 /*
2161 * Get parent's attributes if not ignoring crossmount
2162 * and this is the root of a cross-mounted filesystem.
2163 */
2164 if (ignore_crossmnt == 0 &&
2165 dentry == exp->ex_path.mnt->mnt_root) {
2166 struct path path = exp->ex_path;
2167 path_get(&path);
2168 while (follow_up(&path)) {
2169 if (path.dentry != path.mnt->mnt_root)
2170 break;
2171 }
2172 err = vfs_getattr(path.mnt, path.dentry, &stat);
2173 path_put(&path);
2174 if (err)
2175 goto out_nfserr;
2176 }
2177 WRITE64(stat.ino);
2178 }
2179 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2180 WRITE32(3);
2181 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2182 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2183 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2184 }
2185
2186 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2187 *countp = p - buffer;
2188 status = nfs_ok;
2189
2190 out:
2191 kfree(acl);
2192 if (fhp == &tempfh)
2193 fh_put(&tempfh);
2194 return status;
2195 out_nfserr:
2196 status = nfserrno(err);
2197 goto out;
2198 out_resource:
2199 *countp = 0;
2200 status = nfserr_resource;
2201 goto out;
2202 out_serverfault:
2203 status = nfserr_serverfault;
2204 goto out;
2205 }
2206
2207 static inline int attributes_need_mount(u32 *bmval)
2208 {
2209 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2210 return 1;
2211 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2212 return 1;
2213 return 0;
2214 }
2215
2216 static __be32
2217 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2218 const char *name, int namlen, __be32 *p, int *buflen)
2219 {
2220 struct svc_export *exp = cd->rd_fhp->fh_export;
2221 struct dentry *dentry;
2222 __be32 nfserr;
2223 int ignore_crossmnt = 0;
2224
2225 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2226 if (IS_ERR(dentry))
2227 return nfserrno(PTR_ERR(dentry));
2228 if (!dentry->d_inode) {
2229 /*
2230 * nfsd_buffered_readdir drops the i_mutex between
2231 * readdir and calling this callback, leaving a window
2232 * where this directory entry could have gone away.
2233 */
2234 dput(dentry);
2235 return nfserr_noent;
2236 }
2237
2238 exp_get(exp);
2239 /*
2240 * In the case of a mountpoint, the client may be asking for
2241 * attributes that are only properties of the underlying filesystem
2242 * as opposed to the cross-mounted file system. In such a case,
2243 * we will not follow the cross mount and will fill the attribtutes
2244 * directly from the mountpoint dentry.
2245 */
2246 if (nfsd_mountpoint(dentry, exp)) {
2247 int err;
2248
2249 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2250 && !attributes_need_mount(cd->rd_bmval)) {
2251 ignore_crossmnt = 1;
2252 goto out_encode;
2253 }
2254 /*
2255 * Why the heck aren't we just using nfsd_lookup??
2256 * Different "."/".." handling? Something else?
2257 * At least, add a comment here to explain....
2258 */
2259 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2260 if (err) {
2261 nfserr = nfserrno(err);
2262 goto out_put;
2263 }
2264 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2265 if (nfserr)
2266 goto out_put;
2267
2268 }
2269 out_encode:
2270 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2271 cd->rd_rqstp, ignore_crossmnt);
2272 out_put:
2273 dput(dentry);
2274 exp_put(exp);
2275 return nfserr;
2276 }
2277
2278 static __be32 *
2279 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2280 {
2281 __be32 *attrlenp;
2282
2283 if (buflen < 6)
2284 return NULL;
2285 *p++ = htonl(2);
2286 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2287 *p++ = htonl(0); /* bmval1 */
2288
2289 attrlenp = p++;
2290 *p++ = nfserr; /* no htonl */
2291 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2292 return p;
2293 }
2294
2295 static int
2296 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2297 loff_t offset, u64 ino, unsigned int d_type)
2298 {
2299 struct readdir_cd *ccd = ccdv;
2300 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2301 int buflen;
2302 __be32 *p = cd->buffer;
2303 __be32 *cookiep;
2304 __be32 nfserr = nfserr_toosmall;
2305
2306 /* In nfsv4, "." and ".." never make it onto the wire.. */
2307 if (name && isdotent(name, namlen)) {
2308 cd->common.err = nfs_ok;
2309 return 0;
2310 }
2311
2312 if (cd->offset)
2313 xdr_encode_hyper(cd->offset, (u64) offset);
2314
2315 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2316 if (buflen < 0)
2317 goto fail;
2318
2319 *p++ = xdr_one; /* mark entry present */
2320 cookiep = p;
2321 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2322 p = xdr_encode_array(p, name, namlen); /* name length & name */
2323
2324 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2325 switch (nfserr) {
2326 case nfs_ok:
2327 p += buflen;
2328 break;
2329 case nfserr_resource:
2330 nfserr = nfserr_toosmall;
2331 goto fail;
2332 case nfserr_noent:
2333 goto skip_entry;
2334 default:
2335 /*
2336 * If the client requested the RDATTR_ERROR attribute,
2337 * we stuff the error code into this attribute
2338 * and continue. If this attribute was not requested,
2339 * then in accordance with the spec, we fail the
2340 * entire READDIR operation(!)
2341 */
2342 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2343 goto fail;
2344 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2345 if (p == NULL) {
2346 nfserr = nfserr_toosmall;
2347 goto fail;
2348 }
2349 }
2350 cd->buflen -= (p - cd->buffer);
2351 cd->buffer = p;
2352 cd->offset = cookiep;
2353 skip_entry:
2354 cd->common.err = nfs_ok;
2355 return 0;
2356 fail:
2357 cd->common.err = nfserr;
2358 return -EINVAL;
2359 }
2360
2361 static void
2362 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2363 {
2364 __be32 *p;
2365
2366 RESERVE_SPACE(sizeof(stateid_t));
2367 WRITE32(sid->si_generation);
2368 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2369 ADJUST_ARGS();
2370 }
2371
2372 static __be32
2373 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2374 {
2375 __be32 *p;
2376
2377 if (!nfserr) {
2378 RESERVE_SPACE(8);
2379 WRITE32(access->ac_supported);
2380 WRITE32(access->ac_resp_access);
2381 ADJUST_ARGS();
2382 }
2383 return nfserr;
2384 }
2385
2386 static __be32
2387 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2388 {
2389 ENCODE_SEQID_OP_HEAD;
2390
2391 if (!nfserr)
2392 nfsd4_encode_stateid(resp, &close->cl_stateid);
2393
2394 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2395 return nfserr;
2396 }
2397
2398
2399 static __be32
2400 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2401 {
2402 __be32 *p;
2403
2404 if (!nfserr) {
2405 RESERVE_SPACE(8);
2406 WRITEMEM(commit->co_verf.data, 8);
2407 ADJUST_ARGS();
2408 }
2409 return nfserr;
2410 }
2411
2412 static __be32
2413 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2414 {
2415 __be32 *p;
2416
2417 if (!nfserr) {
2418 RESERVE_SPACE(32);
2419 write_cinfo(&p, &create->cr_cinfo);
2420 WRITE32(2);
2421 WRITE32(create->cr_bmval[0]);
2422 WRITE32(create->cr_bmval[1]);
2423 ADJUST_ARGS();
2424 }
2425 return nfserr;
2426 }
2427
2428 static __be32
2429 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2430 {
2431 struct svc_fh *fhp = getattr->ga_fhp;
2432 int buflen;
2433
2434 if (nfserr)
2435 return nfserr;
2436
2437 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2438 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2439 resp->p, &buflen, getattr->ga_bmval,
2440 resp->rqstp, 0);
2441 if (!nfserr)
2442 resp->p += buflen;
2443 return nfserr;
2444 }
2445
2446 static __be32
2447 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2448 {
2449 struct svc_fh *fhp = *fhpp;
2450 unsigned int len;
2451 __be32 *p;
2452
2453 if (!nfserr) {
2454 len = fhp->fh_handle.fh_size;
2455 RESERVE_SPACE(len + 4);
2456 WRITE32(len);
2457 WRITEMEM(&fhp->fh_handle.fh_base, len);
2458 ADJUST_ARGS();
2459 }
2460 return nfserr;
2461 }
2462
2463 /*
2464 * Including all fields other than the name, a LOCK4denied structure requires
2465 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2466 */
2467 static void
2468 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2469 {
2470 __be32 *p;
2471
2472 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2473 WRITE64(ld->ld_start);
2474 WRITE64(ld->ld_length);
2475 WRITE32(ld->ld_type);
2476 if (ld->ld_sop) {
2477 WRITEMEM(&ld->ld_clientid, 8);
2478 WRITE32(ld->ld_sop->so_owner.len);
2479 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2480 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2481 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2482 WRITE64((u64)0); /* clientid */
2483 WRITE32(0); /* length of owner name */
2484 }
2485 ADJUST_ARGS();
2486 }
2487
2488 static __be32
2489 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2490 {
2491 ENCODE_SEQID_OP_HEAD;
2492
2493 if (!nfserr)
2494 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2495 else if (nfserr == nfserr_denied)
2496 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2497
2498 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2499 return nfserr;
2500 }
2501
2502 static __be32
2503 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2504 {
2505 if (nfserr == nfserr_denied)
2506 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2507 return nfserr;
2508 }
2509
2510 static __be32
2511 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2512 {
2513 ENCODE_SEQID_OP_HEAD;
2514
2515 if (!nfserr)
2516 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2517
2518 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2519 return nfserr;
2520 }
2521
2522
2523 static __be32
2524 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2525 {
2526 __be32 *p;
2527
2528 if (!nfserr) {
2529 RESERVE_SPACE(20);
2530 write_cinfo(&p, &link->li_cinfo);
2531 ADJUST_ARGS();
2532 }
2533 return nfserr;
2534 }
2535
2536
2537 static __be32
2538 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2539 {
2540 __be32 *p;
2541 ENCODE_SEQID_OP_HEAD;
2542
2543 if (nfserr)
2544 goto out;
2545
2546 nfsd4_encode_stateid(resp, &open->op_stateid);
2547 RESERVE_SPACE(40);
2548 write_cinfo(&p, &open->op_cinfo);
2549 WRITE32(open->op_rflags);
2550 WRITE32(2);
2551 WRITE32(open->op_bmval[0]);
2552 WRITE32(open->op_bmval[1]);
2553 WRITE32(open->op_delegate_type);
2554 ADJUST_ARGS();
2555
2556 switch (open->op_delegate_type) {
2557 case NFS4_OPEN_DELEGATE_NONE:
2558 break;
2559 case NFS4_OPEN_DELEGATE_READ:
2560 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2561 RESERVE_SPACE(20);
2562 WRITE32(open->op_recall);
2563
2564 /*
2565 * TODO: ACE's in delegations
2566 */
2567 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2568 WRITE32(0);
2569 WRITE32(0);
2570 WRITE32(0); /* XXX: is NULL principal ok? */
2571 ADJUST_ARGS();
2572 break;
2573 case NFS4_OPEN_DELEGATE_WRITE:
2574 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2575 RESERVE_SPACE(32);
2576 WRITE32(0);
2577
2578 /*
2579 * TODO: space_limit's in delegations
2580 */
2581 WRITE32(NFS4_LIMIT_SIZE);
2582 WRITE32(~(u32)0);
2583 WRITE32(~(u32)0);
2584
2585 /*
2586 * TODO: ACE's in delegations
2587 */
2588 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2589 WRITE32(0);
2590 WRITE32(0);
2591 WRITE32(0); /* XXX: is NULL principal ok? */
2592 ADJUST_ARGS();
2593 break;
2594 default:
2595 BUG();
2596 }
2597 /* XXX save filehandle here */
2598 out:
2599 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2600 return nfserr;
2601 }
2602
2603 static __be32
2604 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2605 {
2606 ENCODE_SEQID_OP_HEAD;
2607
2608 if (!nfserr)
2609 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2610
2611 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2612 return nfserr;
2613 }
2614
2615 static __be32
2616 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2617 {
2618 ENCODE_SEQID_OP_HEAD;
2619
2620 if (!nfserr)
2621 nfsd4_encode_stateid(resp, &od->od_stateid);
2622
2623 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2624 return nfserr;
2625 }
2626
2627 static __be32
2628 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2629 struct nfsd4_read *read)
2630 {
2631 u32 eof;
2632 int v, pn;
2633 unsigned long maxcount;
2634 long len;
2635 __be32 *p;
2636
2637 if (nfserr)
2638 return nfserr;
2639 if (resp->xbuf->page_len)
2640 return nfserr_resource;
2641
2642 RESERVE_SPACE(8); /* eof flag and byte count */
2643
2644 maxcount = svc_max_payload(resp->rqstp);
2645 if (maxcount > read->rd_length)
2646 maxcount = read->rd_length;
2647
2648 len = maxcount;
2649 v = 0;
2650 while (len > 0) {
2651 pn = resp->rqstp->rq_resused++;
2652 resp->rqstp->rq_vec[v].iov_base =
2653 page_address(resp->rqstp->rq_respages[pn]);
2654 resp->rqstp->rq_vec[v].iov_len =
2655 len < PAGE_SIZE ? len : PAGE_SIZE;
2656 v++;
2657 len -= PAGE_SIZE;
2658 }
2659 read->rd_vlen = v;
2660
2661 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2662 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2663 &maxcount);
2664
2665 if (nfserr == nfserr_symlink)
2666 nfserr = nfserr_inval;
2667 if (nfserr)
2668 return nfserr;
2669 eof = (read->rd_offset + maxcount >=
2670 read->rd_fhp->fh_dentry->d_inode->i_size);
2671
2672 WRITE32(eof);
2673 WRITE32(maxcount);
2674 ADJUST_ARGS();
2675 resp->xbuf->head[0].iov_len = (char*)p
2676 - (char*)resp->xbuf->head[0].iov_base;
2677 resp->xbuf->page_len = maxcount;
2678
2679 /* Use rest of head for padding and remaining ops: */
2680 resp->xbuf->tail[0].iov_base = p;
2681 resp->xbuf->tail[0].iov_len = 0;
2682 if (maxcount&3) {
2683 RESERVE_SPACE(4);
2684 WRITE32(0);
2685 resp->xbuf->tail[0].iov_base += maxcount&3;
2686 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2687 ADJUST_ARGS();
2688 }
2689 return 0;
2690 }
2691
2692 static __be32
2693 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2694 {
2695 int maxcount;
2696 char *page;
2697 __be32 *p;
2698
2699 if (nfserr)
2700 return nfserr;
2701 if (resp->xbuf->page_len)
2702 return nfserr_resource;
2703
2704 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2705
2706 maxcount = PAGE_SIZE;
2707 RESERVE_SPACE(4);
2708
2709 /*
2710 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2711 * if they would overflow the buffer. Is this kosher in NFSv4? If
2712 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2713 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2714 */
2715 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2716 if (nfserr == nfserr_isdir)
2717 return nfserr_inval;
2718 if (nfserr)
2719 return nfserr;
2720
2721 WRITE32(maxcount);
2722 ADJUST_ARGS();
2723 resp->xbuf->head[0].iov_len = (char*)p
2724 - (char*)resp->xbuf->head[0].iov_base;
2725 resp->xbuf->page_len = maxcount;
2726
2727 /* Use rest of head for padding and remaining ops: */
2728 resp->xbuf->tail[0].iov_base = p;
2729 resp->xbuf->tail[0].iov_len = 0;
2730 if (maxcount&3) {
2731 RESERVE_SPACE(4);
2732 WRITE32(0);
2733 resp->xbuf->tail[0].iov_base += maxcount&3;
2734 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2735 ADJUST_ARGS();
2736 }
2737 return 0;
2738 }
2739
2740 static __be32
2741 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2742 {
2743 int maxcount;
2744 loff_t offset;
2745 __be32 *page, *savep, *tailbase;
2746 __be32 *p;
2747
2748 if (nfserr)
2749 return nfserr;
2750 if (resp->xbuf->page_len)
2751 return nfserr_resource;
2752
2753 RESERVE_SPACE(8); /* verifier */
2754 savep = p;
2755
2756 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2757 WRITE32(0);
2758 WRITE32(0);
2759 ADJUST_ARGS();
2760 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2761 tailbase = p;
2762
2763 maxcount = PAGE_SIZE;
2764 if (maxcount > readdir->rd_maxcount)
2765 maxcount = readdir->rd_maxcount;
2766
2767 /*
2768 * Convert from bytes to words, account for the two words already
2769 * written, make sure to leave two words at the end for the next
2770 * pointer and eof field.
2771 */
2772 maxcount = (maxcount >> 2) - 4;
2773 if (maxcount < 0) {
2774 nfserr = nfserr_toosmall;
2775 goto err_no_verf;
2776 }
2777
2778 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2779 readdir->common.err = 0;
2780 readdir->buflen = maxcount;
2781 readdir->buffer = page;
2782 readdir->offset = NULL;
2783
2784 offset = readdir->rd_cookie;
2785 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2786 &offset,
2787 &readdir->common, nfsd4_encode_dirent);
2788 if (nfserr == nfs_ok &&
2789 readdir->common.err == nfserr_toosmall &&
2790 readdir->buffer == page)
2791 nfserr = nfserr_toosmall;
2792 if (nfserr == nfserr_symlink)
2793 nfserr = nfserr_notdir;
2794 if (nfserr)
2795 goto err_no_verf;
2796
2797 if (readdir->offset)
2798 xdr_encode_hyper(readdir->offset, offset);
2799
2800 p = readdir->buffer;
2801 *p++ = 0; /* no more entries */
2802 *p++ = htonl(readdir->common.err == nfserr_eof);
2803 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2804 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2805
2806 /* Use rest of head for padding and remaining ops: */
2807 resp->xbuf->tail[0].iov_base = tailbase;
2808 resp->xbuf->tail[0].iov_len = 0;
2809 resp->p = resp->xbuf->tail[0].iov_base;
2810 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2811
2812 return 0;
2813 err_no_verf:
2814 p = savep;
2815 ADJUST_ARGS();
2816 return nfserr;
2817 }
2818
2819 static __be32
2820 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2821 {
2822 __be32 *p;
2823
2824 if (!nfserr) {
2825 RESERVE_SPACE(20);
2826 write_cinfo(&p, &remove->rm_cinfo);
2827 ADJUST_ARGS();
2828 }
2829 return nfserr;
2830 }
2831
2832 static __be32
2833 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2834 {
2835 __be32 *p;
2836
2837 if (!nfserr) {
2838 RESERVE_SPACE(40);
2839 write_cinfo(&p, &rename->rn_sinfo);
2840 write_cinfo(&p, &rename->rn_tinfo);
2841 ADJUST_ARGS();
2842 }
2843 return nfserr;
2844 }
2845
2846 static __be32
2847 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2848 __be32 nfserr,struct svc_export *exp)
2849 {
2850 int i = 0;
2851 u32 nflavs;
2852 struct exp_flavor_info *flavs;
2853 struct exp_flavor_info def_flavs[2];
2854 __be32 *p;
2855
2856 if (nfserr)
2857 goto out;
2858 if (exp->ex_nflavors) {
2859 flavs = exp->ex_flavors;
2860 nflavs = exp->ex_nflavors;
2861 } else { /* Handling of some defaults in absence of real secinfo: */
2862 flavs = def_flavs;
2863 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2864 nflavs = 2;
2865 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2866 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2867 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2868 nflavs = 1;
2869 flavs[0].pseudoflavor
2870 = svcauth_gss_flavor(exp->ex_client);
2871 } else {
2872 nflavs = 1;
2873 flavs[0].pseudoflavor
2874 = exp->ex_client->flavour->flavour;
2875 }
2876 }
2877
2878 RESERVE_SPACE(4);
2879 WRITE32(nflavs);
2880 ADJUST_ARGS();
2881 for (i = 0; i < nflavs; i++) {
2882 u32 flav = flavs[i].pseudoflavor;
2883 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2884
2885 if (gm) {
2886 RESERVE_SPACE(4);
2887 WRITE32(RPC_AUTH_GSS);
2888 ADJUST_ARGS();
2889 RESERVE_SPACE(4 + gm->gm_oid.len);
2890 WRITE32(gm->gm_oid.len);
2891 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2892 ADJUST_ARGS();
2893 RESERVE_SPACE(4);
2894 WRITE32(0); /* qop */
2895 ADJUST_ARGS();
2896 RESERVE_SPACE(4);
2897 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2898 ADJUST_ARGS();
2899 gss_mech_put(gm);
2900 } else {
2901 RESERVE_SPACE(4);
2902 WRITE32(flav);
2903 ADJUST_ARGS();
2904 }
2905 }
2906 out:
2907 if (exp)
2908 exp_put(exp);
2909 return nfserr;
2910 }
2911
2912 static __be32
2913 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2914 struct nfsd4_secinfo *secinfo)
2915 {
2916 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
2917 }
2918
2919 static __be32
2920 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
2921 struct nfsd4_secinfo_no_name *secinfo)
2922 {
2923 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
2924 }
2925
2926 /*
2927 * The SETATTR encode routine is special -- it always encodes a bitmap,
2928 * regardless of the error status.
2929 */
2930 static __be32
2931 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2932 {
2933 __be32 *p;
2934
2935 RESERVE_SPACE(12);
2936 if (nfserr) {
2937 WRITE32(2);
2938 WRITE32(0);
2939 WRITE32(0);
2940 }
2941 else {
2942 WRITE32(2);
2943 WRITE32(setattr->sa_bmval[0]);
2944 WRITE32(setattr->sa_bmval[1]);
2945 }
2946 ADJUST_ARGS();
2947 return nfserr;
2948 }
2949
2950 static __be32
2951 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2952 {
2953 __be32 *p;
2954
2955 if (!nfserr) {
2956 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2957 WRITEMEM(&scd->se_clientid, 8);
2958 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2959 ADJUST_ARGS();
2960 }
2961 else if (nfserr == nfserr_clid_inuse) {
2962 RESERVE_SPACE(8);
2963 WRITE32(0);
2964 WRITE32(0);
2965 ADJUST_ARGS();
2966 }
2967 return nfserr;
2968 }
2969
2970 static __be32
2971 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2972 {
2973 __be32 *p;
2974
2975 if (!nfserr) {
2976 RESERVE_SPACE(16);
2977 WRITE32(write->wr_bytes_written);
2978 WRITE32(write->wr_how_written);
2979 WRITEMEM(write->wr_verifier.data, 8);
2980 ADJUST_ARGS();
2981 }
2982 return nfserr;
2983 }
2984
2985 static __be32
2986 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2987 struct nfsd4_exchange_id *exid)
2988 {
2989 __be32 *p;
2990 char *major_id;
2991 char *server_scope;
2992 int major_id_sz;
2993 int server_scope_sz;
2994 uint64_t minor_id = 0;
2995
2996 if (nfserr)
2997 return nfserr;
2998
2999 major_id = utsname()->nodename;
3000 major_id_sz = strlen(major_id);
3001 server_scope = utsname()->nodename;
3002 server_scope_sz = strlen(server_scope);
3003
3004 RESERVE_SPACE(
3005 8 /* eir_clientid */ +
3006 4 /* eir_sequenceid */ +
3007 4 /* eir_flags */ +
3008 4 /* spr_how (SP4_NONE) */ +
3009 8 /* so_minor_id */ +
3010 4 /* so_major_id.len */ +
3011 (XDR_QUADLEN(major_id_sz) * 4) +
3012 4 /* eir_server_scope.len */ +
3013 (XDR_QUADLEN(server_scope_sz) * 4) +
3014 4 /* eir_server_impl_id.count (0) */);
3015
3016 WRITEMEM(&exid->clientid, 8);
3017 WRITE32(exid->seqid);
3018 WRITE32(exid->flags);
3019
3020 /* state_protect4_r. Currently only support SP4_NONE */
3021 BUG_ON(exid->spa_how != SP4_NONE);
3022 WRITE32(exid->spa_how);
3023
3024 /* The server_owner struct */
3025 WRITE64(minor_id); /* Minor id */
3026 /* major id */
3027 WRITE32(major_id_sz);
3028 WRITEMEM(major_id, major_id_sz);
3029
3030 /* Server scope */
3031 WRITE32(server_scope_sz);
3032 WRITEMEM(server_scope, server_scope_sz);
3033
3034 /* Implementation id */
3035 WRITE32(0); /* zero length nfs_impl_id4 array */
3036 ADJUST_ARGS();
3037 return 0;
3038 }
3039
3040 static __be32
3041 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3042 struct nfsd4_create_session *sess)
3043 {
3044 __be32 *p;
3045
3046 if (nfserr)
3047 return nfserr;
3048
3049 RESERVE_SPACE(24);
3050 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3051 WRITE32(sess->seqid);
3052 WRITE32(sess->flags);
3053 ADJUST_ARGS();
3054
3055 RESERVE_SPACE(28);
3056 WRITE32(0); /* headerpadsz */
3057 WRITE32(sess->fore_channel.maxreq_sz);
3058 WRITE32(sess->fore_channel.maxresp_sz);
3059 WRITE32(sess->fore_channel.maxresp_cached);
3060 WRITE32(sess->fore_channel.maxops);
3061 WRITE32(sess->fore_channel.maxreqs);
3062 WRITE32(sess->fore_channel.nr_rdma_attrs);
3063 ADJUST_ARGS();
3064
3065 if (sess->fore_channel.nr_rdma_attrs) {
3066 RESERVE_SPACE(4);
3067 WRITE32(sess->fore_channel.rdma_attrs);
3068 ADJUST_ARGS();
3069 }
3070
3071 RESERVE_SPACE(28);
3072 WRITE32(0); /* headerpadsz */
3073 WRITE32(sess->back_channel.maxreq_sz);
3074 WRITE32(sess->back_channel.maxresp_sz);
3075 WRITE32(sess->back_channel.maxresp_cached);
3076 WRITE32(sess->back_channel.maxops);
3077 WRITE32(sess->back_channel.maxreqs);
3078 WRITE32(sess->back_channel.nr_rdma_attrs);
3079 ADJUST_ARGS();
3080
3081 if (sess->back_channel.nr_rdma_attrs) {
3082 RESERVE_SPACE(4);
3083 WRITE32(sess->back_channel.rdma_attrs);
3084 ADJUST_ARGS();
3085 }
3086 return 0;
3087 }
3088
3089 static __be32
3090 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3091 struct nfsd4_destroy_session *destroy_session)
3092 {
3093 return nfserr;
3094 }
3095
3096 __be32
3097 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3098 struct nfsd4_sequence *seq)
3099 {
3100 __be32 *p;
3101
3102 if (nfserr)
3103 return nfserr;
3104
3105 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3106 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3107 WRITE32(seq->seqid);
3108 WRITE32(seq->slotid);
3109 WRITE32(seq->maxslots);
3110 /*
3111 * FIXME: for now:
3112 * target_maxslots = maxslots
3113 * status_flags = 0
3114 */
3115 WRITE32(seq->maxslots);
3116 WRITE32(0);
3117
3118 ADJUST_ARGS();
3119 resp->cstate.datap = p; /* DRC cache data pointer */
3120 return 0;
3121 }
3122
3123 static __be32
3124 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3125 {
3126 return nfserr;
3127 }
3128
3129 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3130
3131 /*
3132 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3133 * since we don't need to filter out obsolete ops as this is
3134 * done in the decoding phase.
3135 */
3136 static nfsd4_enc nfsd4_enc_ops[] = {
3137 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3138 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3139 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3140 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3141 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3143 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3144 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3145 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3146 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3147 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3148 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3149 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3150 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3151 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3152 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3153 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3154 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3155 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3156 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3157 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3158 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3159 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3160 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3161 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3162 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3163 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3164 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3165 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3166 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3167 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3168 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3169 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3170 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3171 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3172 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3173 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3174
3175 /* NFSv4.1 operations */
3176 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3177 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3178 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3179 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3180 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3181 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3182 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3183 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3184 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3185 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3186 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3187 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3188 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3189 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3190 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3191 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3192 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3193 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3194 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3195 };
3196
3197 /*
3198 * Calculate the total amount of memory that the compound response has taken
3199 * after encoding the current operation.
3200 *
3201 * pad: add on 8 bytes for the next operation's op_code and status so that
3202 * there is room to cache a failure on the next operation.
3203 *
3204 * Compare this length to the session se_fmaxresp_cached.
3205 *
3206 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3207 * will be at least a page and will therefore hold the xdr_buf head.
3208 */
3209 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3210 {
3211 int status = 0;
3212 struct xdr_buf *xb = &resp->rqstp->rq_res;
3213 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3214 struct nfsd4_session *session = NULL;
3215 struct nfsd4_slot *slot = resp->cstate.slot;
3216 u32 length, tlen = 0, pad = 8;
3217
3218 if (!nfsd4_has_session(&resp->cstate))
3219 return status;
3220
3221 session = resp->cstate.session;
3222 if (session == NULL || slot->sl_cachethis == 0)
3223 return status;
3224
3225 if (resp->opcnt >= args->opcnt)
3226 pad = 0; /* this is the last operation */
3227
3228 if (xb->page_len == 0) {
3229 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3230 } else {
3231 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3232 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3233
3234 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3235 }
3236 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3237 length, xb->page_len, tlen, pad);
3238
3239 if (length <= session->se_fchannel.maxresp_cached)
3240 return status;
3241 else
3242 return nfserr_rep_too_big_to_cache;
3243 }
3244
3245 void
3246 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3247 {
3248 __be32 *statp;
3249 __be32 *p;
3250
3251 RESERVE_SPACE(8);
3252 WRITE32(op->opnum);
3253 statp = p++; /* to be backfilled at the end */
3254 ADJUST_ARGS();
3255
3256 if (op->opnum == OP_ILLEGAL)
3257 goto status;
3258 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3259 !nfsd4_enc_ops[op->opnum]);
3260 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3261 /* nfsd4_check_drc_limit guarantees enough room for error status */
3262 if (!op->status && nfsd4_check_drc_limit(resp))
3263 op->status = nfserr_rep_too_big_to_cache;
3264 status:
3265 /*
3266 * Note: We write the status directly, instead of using WRITE32(),
3267 * since it is already in network byte order.
3268 */
3269 *statp = op->status;
3270 }
3271
3272 /*
3273 * Encode the reply stored in the stateowner reply cache
3274 *
3275 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3276 * previously sent already encoded operation.
3277 *
3278 * called with nfs4_lock_state() held
3279 */
3280 void
3281 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3282 {
3283 __be32 *p;
3284 struct nfs4_replay *rp = op->replay;
3285
3286 BUG_ON(!rp);
3287
3288 RESERVE_SPACE(8);
3289 WRITE32(op->opnum);
3290 *p++ = rp->rp_status; /* already xdr'ed */
3291 ADJUST_ARGS();
3292
3293 RESERVE_SPACE(rp->rp_buflen);
3294 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3295 ADJUST_ARGS();
3296 }
3297
3298 int
3299 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3300 {
3301 return xdr_ressize_check(rqstp, p);
3302 }
3303
3304 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3305 {
3306 if (args->ops != args->iops) {
3307 kfree(args->ops);
3308 args->ops = args->iops;
3309 }
3310 kfree(args->tmpp);
3311 args->tmpp = NULL;
3312 while (args->to_free) {
3313 struct tmpbuf *tb = args->to_free;
3314 args->to_free = tb->next;
3315 tb->release(tb->buf);
3316 kfree(tb);
3317 }
3318 }
3319
3320 int
3321 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3322 {
3323 __be32 status;
3324
3325 args->p = p;
3326 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3327 args->pagelist = rqstp->rq_arg.pages;
3328 args->pagelen = rqstp->rq_arg.page_len;
3329 args->tmpp = NULL;
3330 args->to_free = NULL;
3331 args->ops = args->iops;
3332 args->rqstp = rqstp;
3333
3334 status = nfsd4_decode_compound(args);
3335 if (status) {
3336 nfsd4_release_compoundargs(args);
3337 }
3338 return !status;
3339 }
3340
3341 int
3342 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3343 {
3344 /*
3345 * All that remains is to write the tag and operation count...
3346 */
3347 struct nfsd4_compound_state *cs = &resp->cstate;
3348 struct kvec *iov;
3349 p = resp->tagp;
3350 *p++ = htonl(resp->taglen);
3351 memcpy(p, resp->tag, resp->taglen);
3352 p += XDR_QUADLEN(resp->taglen);
3353 *p++ = htonl(resp->opcnt);
3354
3355 if (rqstp->rq_res.page_len)
3356 iov = &rqstp->rq_res.tail[0];
3357 else
3358 iov = &rqstp->rq_res.head[0];
3359 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3360 BUG_ON(iov->iov_len > PAGE_SIZE);
3361 if (nfsd4_has_session(cs)) {
3362 if (cs->status != nfserr_replay_cache) {
3363 nfsd4_store_cache_entry(resp);
3364 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3365 cs->slot->sl_inuse = false;
3366 }
3367 /* Renew the clientid on success and on replay */
3368 release_session_client(cs->session);
3369 nfsd4_put_session(cs->session);
3370 }
3371 return 1;
3372 }
3373
3374 /*
3375 * Local variables:
3376 * c-basic-offset: 8
3377 * End:
3378 */
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