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[GitHub/mt8127/android_kernel_alcatel_ttab.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/namei.h>
44 #include <linux/statfs.h>
45 #include <linux/utsname.h>
46 #include <linux/nfsd_idmap.h>
47 #include <linux/nfs4_acl.h>
48 #include <linux/sunrpc/svcauth_gss.h>
49
50 #include "xdr4.h"
51 #include "vfs.h"
52
53 #define NFSDDBG_FACILITY NFSDDBG_XDR
54
55 /*
56 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
57 * directory in order to indicate to the client that a filesystem boundary is present
58 * We use a fixed fsid for a referral
59 */
60 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
61 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
62
63 static __be32
64 check_filename(char *str, int len, __be32 err)
65 {
66 int i;
67
68 if (len == 0)
69 return nfserr_inval;
70 if (isdotent(str, len))
71 return err;
72 for (i = 0; i < len; i++)
73 if (str[i] == '/')
74 return err;
75 return 0;
76 }
77
78 #define DECODE_HEAD \
79 __be32 *p; \
80 __be32 status
81 #define DECODE_TAIL \
82 status = 0; \
83 out: \
84 return status; \
85 xdr_error: \
86 dprintk("NFSD: xdr error (%s:%d)\n", \
87 __FILE__, __LINE__); \
88 status = nfserr_bad_xdr; \
89 goto out
90
91 #define READ32(x) (x) = ntohl(*p++)
92 #define READ64(x) do { \
93 (x) = (u64)ntohl(*p++) << 32; \
94 (x) |= ntohl(*p++); \
95 } while (0)
96 #define READTIME(x) do { \
97 p++; \
98 (x) = ntohl(*p++); \
99 p++; \
100 } while (0)
101 #define READMEM(x,nbytes) do { \
102 x = (char *)p; \
103 p += XDR_QUADLEN(nbytes); \
104 } while (0)
105 #define SAVEMEM(x,nbytes) do { \
106 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
107 savemem(argp, p, nbytes) : \
108 (char *)p)) { \
109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
111 goto xdr_error; \
112 } \
113 p += XDR_QUADLEN(nbytes); \
114 } while (0)
115 #define COPYMEM(x,nbytes) do { \
116 memcpy((x), p, nbytes); \
117 p += XDR_QUADLEN(nbytes); \
118 } while (0)
119
120 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
121 #define READ_BUF(nbytes) do { \
122 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
123 p = argp->p; \
124 argp->p += XDR_QUADLEN(nbytes); \
125 } else if (!(p = read_buf(argp, nbytes))) { \
126 dprintk("NFSD: xdr error (%s:%d)\n", \
127 __FILE__, __LINE__); \
128 goto xdr_error; \
129 } \
130 } while (0)
131
132 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
133 {
134 /* We want more bytes than seem to be available.
135 * Maybe we need a new page, maybe we have just run out
136 */
137 unsigned int avail = (char *)argp->end - (char *)argp->p;
138 __be32 *p;
139 if (avail + argp->pagelen < nbytes)
140 return NULL;
141 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
142 return NULL;
143 /* ok, we can do it with the current plus the next page */
144 if (nbytes <= sizeof(argp->tmp))
145 p = argp->tmp;
146 else {
147 kfree(argp->tmpp);
148 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
149 if (!p)
150 return NULL;
151
152 }
153 /*
154 * The following memcpy is safe because read_buf is always
155 * called with nbytes > avail, and the two cases above both
156 * guarantee p points to at least nbytes bytes.
157 */
158 memcpy(p, argp->p, avail);
159 /* step to next page */
160 argp->p = page_address(argp->pagelist[0]);
161 argp->pagelist++;
162 if (argp->pagelen < PAGE_SIZE) {
163 argp->end = p + (argp->pagelen>>2);
164 argp->pagelen = 0;
165 } else {
166 argp->end = p + (PAGE_SIZE>>2);
167 argp->pagelen -= PAGE_SIZE;
168 }
169 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
170 argp->p += XDR_QUADLEN(nbytes - avail);
171 return p;
172 }
173
174 static int zero_clientid(clientid_t *clid)
175 {
176 return (clid->cl_boot == 0) && (clid->cl_id == 0);
177 }
178
179 static int
180 defer_free(struct nfsd4_compoundargs *argp,
181 void (*release)(const void *), void *p)
182 {
183 struct tmpbuf *tb;
184
185 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
186 if (!tb)
187 return -ENOMEM;
188 tb->buf = p;
189 tb->release = release;
190 tb->next = argp->to_free;
191 argp->to_free = tb;
192 return 0;
193 }
194
195 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
196 {
197 if (p == argp->tmp) {
198 p = kmalloc(nbytes, GFP_KERNEL);
199 if (!p)
200 return NULL;
201 memcpy(p, argp->tmp, nbytes);
202 } else {
203 BUG_ON(p != argp->tmpp);
204 argp->tmpp = NULL;
205 }
206 if (defer_free(argp, kfree, p)) {
207 kfree(p);
208 return NULL;
209 } else
210 return (char *)p;
211 }
212
213 static __be32
214 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
215 {
216 u32 bmlen;
217 DECODE_HEAD;
218
219 bmval[0] = 0;
220 bmval[1] = 0;
221 bmval[2] = 0;
222
223 READ_BUF(4);
224 READ32(bmlen);
225 if (bmlen > 1000)
226 goto xdr_error;
227
228 READ_BUF(bmlen << 2);
229 if (bmlen > 0)
230 READ32(bmval[0]);
231 if (bmlen > 1)
232 READ32(bmval[1]);
233 if (bmlen > 2)
234 READ32(bmval[2]);
235
236 DECODE_TAIL;
237 }
238
239 static __be32
240 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
241 struct iattr *iattr, struct nfs4_acl **acl)
242 {
243 int expected_len, len = 0;
244 u32 dummy32;
245 char *buf;
246 int host_err;
247
248 DECODE_HEAD;
249 iattr->ia_valid = 0;
250 if ((status = nfsd4_decode_bitmap(argp, bmval)))
251 return status;
252
253 READ_BUF(4);
254 READ32(expected_len);
255
256 if (bmval[0] & FATTR4_WORD0_SIZE) {
257 READ_BUF(8);
258 len += 8;
259 READ64(iattr->ia_size);
260 iattr->ia_valid |= ATTR_SIZE;
261 }
262 if (bmval[0] & FATTR4_WORD0_ACL) {
263 int nace;
264 struct nfs4_ace *ace;
265
266 READ_BUF(4); len += 4;
267 READ32(nace);
268
269 if (nace > NFS4_ACL_MAX)
270 return nfserr_resource;
271
272 *acl = nfs4_acl_new(nace);
273 if (*acl == NULL) {
274 host_err = -ENOMEM;
275 goto out_nfserr;
276 }
277 defer_free(argp, kfree, *acl);
278
279 (*acl)->naces = nace;
280 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
281 READ_BUF(16); len += 16;
282 READ32(ace->type);
283 READ32(ace->flag);
284 READ32(ace->access_mask);
285 READ32(dummy32);
286 READ_BUF(dummy32);
287 len += XDR_QUADLEN(dummy32) << 2;
288 READMEM(buf, dummy32);
289 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
290 host_err = 0;
291 if (ace->whotype != NFS4_ACL_WHO_NAMED)
292 ace->who = 0;
293 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
294 host_err = nfsd_map_name_to_gid(argp->rqstp,
295 buf, dummy32, &ace->who);
296 else
297 host_err = nfsd_map_name_to_uid(argp->rqstp,
298 buf, dummy32, &ace->who);
299 if (host_err)
300 goto out_nfserr;
301 }
302 } else
303 *acl = NULL;
304 if (bmval[1] & FATTR4_WORD1_MODE) {
305 READ_BUF(4);
306 len += 4;
307 READ32(iattr->ia_mode);
308 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
309 iattr->ia_valid |= ATTR_MODE;
310 }
311 if (bmval[1] & FATTR4_WORD1_OWNER) {
312 READ_BUF(4);
313 len += 4;
314 READ32(dummy32);
315 READ_BUF(dummy32);
316 len += (XDR_QUADLEN(dummy32) << 2);
317 READMEM(buf, dummy32);
318 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
319 goto out_nfserr;
320 iattr->ia_valid |= ATTR_UID;
321 }
322 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
323 READ_BUF(4);
324 len += 4;
325 READ32(dummy32);
326 READ_BUF(dummy32);
327 len += (XDR_QUADLEN(dummy32) << 2);
328 READMEM(buf, dummy32);
329 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
330 goto out_nfserr;
331 iattr->ia_valid |= ATTR_GID;
332 }
333 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
334 READ_BUF(4);
335 len += 4;
336 READ32(dummy32);
337 switch (dummy32) {
338 case NFS4_SET_TO_CLIENT_TIME:
339 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
340 all 32 bits of 'nseconds'. */
341 READ_BUF(12);
342 len += 12;
343 READ32(dummy32);
344 if (dummy32)
345 return nfserr_inval;
346 READ32(iattr->ia_atime.tv_sec);
347 READ32(iattr->ia_atime.tv_nsec);
348 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
349 return nfserr_inval;
350 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
351 break;
352 case NFS4_SET_TO_SERVER_TIME:
353 iattr->ia_valid |= ATTR_ATIME;
354 break;
355 default:
356 goto xdr_error;
357 }
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
369 READ32(dummy32);
370 if (dummy32)
371 return nfserr_inval;
372 READ32(iattr->ia_mtime.tv_sec);
373 READ32(iattr->ia_mtime.tv_nsec);
374 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
375 return nfserr_inval;
376 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
377 break;
378 case NFS4_SET_TO_SERVER_TIME:
379 iattr->ia_valid |= ATTR_MTIME;
380 break;
381 default:
382 goto xdr_error;
383 }
384 }
385 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
386 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
387 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
388 READ_BUF(expected_len - len);
389 else if (len != expected_len)
390 goto xdr_error;
391
392 DECODE_TAIL;
393
394 out_nfserr:
395 status = nfserrno(host_err);
396 goto out;
397 }
398
399 static __be32
400 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
401 {
402 DECODE_HEAD;
403
404 READ_BUF(sizeof(stateid_t));
405 READ32(sid->si_generation);
406 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
407
408 DECODE_TAIL;
409 }
410
411 static __be32
412 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
413 {
414 DECODE_HEAD;
415
416 READ_BUF(4);
417 READ32(access->ac_req_access);
418
419 DECODE_TAIL;
420 }
421
422 static __be32
423 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
424 {
425 DECODE_HEAD;
426
427 close->cl_stateowner = NULL;
428 READ_BUF(4);
429 READ32(close->cl_seqid);
430 return nfsd4_decode_stateid(argp, &close->cl_stateid);
431
432 DECODE_TAIL;
433 }
434
435
436 static __be32
437 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
438 {
439 DECODE_HEAD;
440
441 READ_BUF(12);
442 READ64(commit->co_offset);
443 READ32(commit->co_count);
444
445 DECODE_TAIL;
446 }
447
448 static __be32
449 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
450 {
451 DECODE_HEAD;
452
453 READ_BUF(4);
454 READ32(create->cr_type);
455 switch (create->cr_type) {
456 case NF4LNK:
457 READ_BUF(4);
458 READ32(create->cr_linklen);
459 READ_BUF(create->cr_linklen);
460 SAVEMEM(create->cr_linkname, create->cr_linklen);
461 break;
462 case NF4BLK:
463 case NF4CHR:
464 READ_BUF(8);
465 READ32(create->cr_specdata1);
466 READ32(create->cr_specdata2);
467 break;
468 case NF4SOCK:
469 case NF4FIFO:
470 case NF4DIR:
471 default:
472 break;
473 }
474
475 READ_BUF(4);
476 READ32(create->cr_namelen);
477 READ_BUF(create->cr_namelen);
478 SAVEMEM(create->cr_name, create->cr_namelen);
479 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
480 return status;
481
482 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
483 &create->cr_acl);
484 if (status)
485 goto out;
486
487 DECODE_TAIL;
488 }
489
490 static inline __be32
491 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
492 {
493 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
494 }
495
496 static inline __be32
497 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
498 {
499 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
500 }
501
502 static __be32
503 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
504 {
505 DECODE_HEAD;
506
507 READ_BUF(4);
508 READ32(link->li_namelen);
509 READ_BUF(link->li_namelen);
510 SAVEMEM(link->li_name, link->li_namelen);
511 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
512 return status;
513
514 DECODE_TAIL;
515 }
516
517 static __be32
518 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
519 {
520 DECODE_HEAD;
521
522 lock->lk_replay_owner = NULL;
523 /*
524 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
525 */
526 READ_BUF(28);
527 READ32(lock->lk_type);
528 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
529 goto xdr_error;
530 READ32(lock->lk_reclaim);
531 READ64(lock->lk_offset);
532 READ64(lock->lk_length);
533 READ32(lock->lk_is_new);
534
535 if (lock->lk_is_new) {
536 READ_BUF(4);
537 READ32(lock->lk_new_open_seqid);
538 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
539 if (status)
540 return status;
541 READ_BUF(8 + sizeof(clientid_t));
542 READ32(lock->lk_new_lock_seqid);
543 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
544 READ32(lock->lk_new_owner.len);
545 READ_BUF(lock->lk_new_owner.len);
546 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
547 } else {
548 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
549 if (status)
550 return status;
551 READ_BUF(4);
552 READ32(lock->lk_old_lock_seqid);
553 }
554
555 DECODE_TAIL;
556 }
557
558 static __be32
559 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
560 {
561 DECODE_HEAD;
562
563 READ_BUF(32);
564 READ32(lockt->lt_type);
565 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
566 goto xdr_error;
567 READ64(lockt->lt_offset);
568 READ64(lockt->lt_length);
569 COPYMEM(&lockt->lt_clientid, 8);
570 READ32(lockt->lt_owner.len);
571 READ_BUF(lockt->lt_owner.len);
572 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
573
574 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
575 return nfserr_inval;
576 DECODE_TAIL;
577 }
578
579 static __be32
580 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
581 {
582 DECODE_HEAD;
583
584 locku->lu_stateowner = NULL;
585 READ_BUF(8);
586 READ32(locku->lu_type);
587 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
588 goto xdr_error;
589 READ32(locku->lu_seqid);
590 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
591 if (status)
592 return status;
593 READ_BUF(16);
594 READ64(locku->lu_offset);
595 READ64(locku->lu_length);
596
597 DECODE_TAIL;
598 }
599
600 static __be32
601 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
602 {
603 DECODE_HEAD;
604
605 READ_BUF(4);
606 READ32(lookup->lo_len);
607 READ_BUF(lookup->lo_len);
608 SAVEMEM(lookup->lo_name, lookup->lo_len);
609 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
610 return status;
611
612 DECODE_TAIL;
613 }
614
615 static __be32
616 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
617 {
618 DECODE_HEAD;
619
620 memset(open->op_bmval, 0, sizeof(open->op_bmval));
621 open->op_iattr.ia_valid = 0;
622 open->op_stateowner = NULL;
623
624 /* seqid, share_access, share_deny, clientid, ownerlen */
625 READ_BUF(16 + sizeof(clientid_t));
626 READ32(open->op_seqid);
627 READ32(open->op_share_access);
628 READ32(open->op_share_deny);
629 COPYMEM(&open->op_clientid, sizeof(clientid_t));
630 READ32(open->op_owner.len);
631
632 /* owner, open_flag */
633 READ_BUF(open->op_owner.len + 4);
634 SAVEMEM(open->op_owner.data, open->op_owner.len);
635 READ32(open->op_create);
636 switch (open->op_create) {
637 case NFS4_OPEN_NOCREATE:
638 break;
639 case NFS4_OPEN_CREATE:
640 READ_BUF(4);
641 READ32(open->op_createmode);
642 switch (open->op_createmode) {
643 case NFS4_CREATE_UNCHECKED:
644 case NFS4_CREATE_GUARDED:
645 status = nfsd4_decode_fattr(argp, open->op_bmval,
646 &open->op_iattr, &open->op_acl);
647 if (status)
648 goto out;
649 break;
650 case NFS4_CREATE_EXCLUSIVE:
651 READ_BUF(8);
652 COPYMEM(open->op_verf.data, 8);
653 break;
654 case NFS4_CREATE_EXCLUSIVE4_1:
655 if (argp->minorversion < 1)
656 goto xdr_error;
657 READ_BUF(8);
658 COPYMEM(open->op_verf.data, 8);
659 status = nfsd4_decode_fattr(argp, open->op_bmval,
660 &open->op_iattr, &open->op_acl);
661 if (status)
662 goto out;
663 break;
664 default:
665 goto xdr_error;
666 }
667 break;
668 default:
669 goto xdr_error;
670 }
671
672 /* open_claim */
673 READ_BUF(4);
674 READ32(open->op_claim_type);
675 switch (open->op_claim_type) {
676 case NFS4_OPEN_CLAIM_NULL:
677 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
678 READ_BUF(4);
679 READ32(open->op_fname.len);
680 READ_BUF(open->op_fname.len);
681 SAVEMEM(open->op_fname.data, open->op_fname.len);
682 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
683 return status;
684 break;
685 case NFS4_OPEN_CLAIM_PREVIOUS:
686 READ_BUF(4);
687 READ32(open->op_delegate_type);
688 break;
689 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
690 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
691 if (status)
692 return status;
693 READ_BUF(4);
694 READ32(open->op_fname.len);
695 READ_BUF(open->op_fname.len);
696 SAVEMEM(open->op_fname.data, open->op_fname.len);
697 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
698 return status;
699 break;
700 default:
701 goto xdr_error;
702 }
703
704 DECODE_TAIL;
705 }
706
707 static __be32
708 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
709 {
710 DECODE_HEAD;
711
712 open_conf->oc_stateowner = NULL;
713 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
714 if (status)
715 return status;
716 READ_BUF(4);
717 READ32(open_conf->oc_seqid);
718
719 DECODE_TAIL;
720 }
721
722 static __be32
723 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
724 {
725 DECODE_HEAD;
726
727 open_down->od_stateowner = NULL;
728 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
729 if (status)
730 return status;
731 READ_BUF(12);
732 READ32(open_down->od_seqid);
733 READ32(open_down->od_share_access);
734 READ32(open_down->od_share_deny);
735
736 DECODE_TAIL;
737 }
738
739 static __be32
740 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
741 {
742 DECODE_HEAD;
743
744 READ_BUF(4);
745 READ32(putfh->pf_fhlen);
746 if (putfh->pf_fhlen > NFS4_FHSIZE)
747 goto xdr_error;
748 READ_BUF(putfh->pf_fhlen);
749 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
750
751 DECODE_TAIL;
752 }
753
754 static __be32
755 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
756 {
757 DECODE_HEAD;
758
759 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
760 if (status)
761 return status;
762 READ_BUF(12);
763 READ64(read->rd_offset);
764 READ32(read->rd_length);
765
766 DECODE_TAIL;
767 }
768
769 static __be32
770 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
771 {
772 DECODE_HEAD;
773
774 READ_BUF(24);
775 READ64(readdir->rd_cookie);
776 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
777 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
778 READ32(readdir->rd_maxcount);
779 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
780 goto out;
781
782 DECODE_TAIL;
783 }
784
785 static __be32
786 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
787 {
788 DECODE_HEAD;
789
790 READ_BUF(4);
791 READ32(remove->rm_namelen);
792 READ_BUF(remove->rm_namelen);
793 SAVEMEM(remove->rm_name, remove->rm_namelen);
794 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
795 return status;
796
797 DECODE_TAIL;
798 }
799
800 static __be32
801 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
802 {
803 DECODE_HEAD;
804
805 READ_BUF(4);
806 READ32(rename->rn_snamelen);
807 READ_BUF(rename->rn_snamelen + 4);
808 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
809 READ32(rename->rn_tnamelen);
810 READ_BUF(rename->rn_tnamelen);
811 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
812 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
813 return status;
814 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
815 return status;
816
817 DECODE_TAIL;
818 }
819
820 static __be32
821 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
822 {
823 DECODE_HEAD;
824
825 READ_BUF(sizeof(clientid_t));
826 COPYMEM(clientid, sizeof(clientid_t));
827
828 DECODE_TAIL;
829 }
830
831 static __be32
832 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
833 struct nfsd4_secinfo *secinfo)
834 {
835 DECODE_HEAD;
836
837 READ_BUF(4);
838 READ32(secinfo->si_namelen);
839 READ_BUF(secinfo->si_namelen);
840 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
841 status = check_filename(secinfo->si_name, secinfo->si_namelen,
842 nfserr_noent);
843 if (status)
844 return status;
845 DECODE_TAIL;
846 }
847
848 static __be32
849 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
850 {
851 __be32 status;
852
853 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
854 if (status)
855 return status;
856 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
857 &setattr->sa_acl);
858 }
859
860 static __be32
861 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
862 {
863 DECODE_HEAD;
864
865 READ_BUF(12);
866 COPYMEM(setclientid->se_verf.data, 8);
867 READ32(setclientid->se_namelen);
868
869 READ_BUF(setclientid->se_namelen + 8);
870 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
871 READ32(setclientid->se_callback_prog);
872 READ32(setclientid->se_callback_netid_len);
873
874 READ_BUF(setclientid->se_callback_netid_len + 4);
875 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
876 READ32(setclientid->se_callback_addr_len);
877
878 READ_BUF(setclientid->se_callback_addr_len + 4);
879 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
880 READ32(setclientid->se_callback_ident);
881
882 DECODE_TAIL;
883 }
884
885 static __be32
886 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
887 {
888 DECODE_HEAD;
889
890 READ_BUF(8 + sizeof(nfs4_verifier));
891 COPYMEM(&scd_c->sc_clientid, 8);
892 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
893
894 DECODE_TAIL;
895 }
896
897 /* Also used for NVERIFY */
898 static __be32
899 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
900 {
901 #if 0
902 struct nfsd4_compoundargs save = {
903 .p = argp->p,
904 .end = argp->end,
905 .rqstp = argp->rqstp,
906 };
907 u32 ve_bmval[2];
908 struct iattr ve_iattr; /* request */
909 struct nfs4_acl *ve_acl; /* request */
910 #endif
911 DECODE_HEAD;
912
913 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
914 goto out;
915
916 /* For convenience's sake, we compare raw xdr'd attributes in
917 * nfsd4_proc_verify; however we still decode here just to return
918 * correct error in case of bad xdr. */
919 #if 0
920 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
921 if (status == nfserr_inval) {
922 status = nfserrno(status);
923 goto out;
924 }
925 #endif
926 READ_BUF(4);
927 READ32(verify->ve_attrlen);
928 READ_BUF(verify->ve_attrlen);
929 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
930
931 DECODE_TAIL;
932 }
933
934 static __be32
935 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
936 {
937 int avail;
938 int v;
939 int len;
940 DECODE_HEAD;
941
942 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
943 if (status)
944 return status;
945 READ_BUF(16);
946 READ64(write->wr_offset);
947 READ32(write->wr_stable_how);
948 if (write->wr_stable_how > 2)
949 goto xdr_error;
950 READ32(write->wr_buflen);
951
952 /* Sorry .. no magic macros for this.. *
953 * READ_BUF(write->wr_buflen);
954 * SAVEMEM(write->wr_buf, write->wr_buflen);
955 */
956 avail = (char*)argp->end - (char*)argp->p;
957 if (avail + argp->pagelen < write->wr_buflen) {
958 dprintk("NFSD: xdr error (%s:%d)\n",
959 __FILE__, __LINE__);
960 goto xdr_error;
961 }
962 argp->rqstp->rq_vec[0].iov_base = p;
963 argp->rqstp->rq_vec[0].iov_len = avail;
964 v = 0;
965 len = write->wr_buflen;
966 while (len > argp->rqstp->rq_vec[v].iov_len) {
967 len -= argp->rqstp->rq_vec[v].iov_len;
968 v++;
969 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
970 argp->pagelist++;
971 if (argp->pagelen >= PAGE_SIZE) {
972 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
973 argp->pagelen -= PAGE_SIZE;
974 } else {
975 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
976 argp->pagelen -= len;
977 }
978 }
979 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
980 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
981 argp->rqstp->rq_vec[v].iov_len = len;
982 write->wr_vlen = v+1;
983
984 DECODE_TAIL;
985 }
986
987 static __be32
988 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
989 {
990 DECODE_HEAD;
991
992 READ_BUF(12);
993 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
994 READ32(rlockowner->rl_owner.len);
995 READ_BUF(rlockowner->rl_owner.len);
996 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
997
998 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
999 return nfserr_inval;
1000 DECODE_TAIL;
1001 }
1002
1003 static __be32
1004 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1005 struct nfsd4_exchange_id *exid)
1006 {
1007 int dummy;
1008 DECODE_HEAD;
1009
1010 READ_BUF(NFS4_VERIFIER_SIZE);
1011 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1012
1013 READ_BUF(4);
1014 READ32(exid->clname.len);
1015
1016 READ_BUF(exid->clname.len);
1017 SAVEMEM(exid->clname.data, exid->clname.len);
1018
1019 READ_BUF(4);
1020 READ32(exid->flags);
1021
1022 /* Ignore state_protect4_a */
1023 READ_BUF(4);
1024 READ32(exid->spa_how);
1025 switch (exid->spa_how) {
1026 case SP4_NONE:
1027 break;
1028 case SP4_MACH_CRED:
1029 /* spo_must_enforce */
1030 READ_BUF(4);
1031 READ32(dummy);
1032 READ_BUF(dummy * 4);
1033 p += dummy;
1034
1035 /* spo_must_allow */
1036 READ_BUF(4);
1037 READ32(dummy);
1038 READ_BUF(dummy * 4);
1039 p += dummy;
1040 break;
1041 case SP4_SSV:
1042 /* ssp_ops */
1043 READ_BUF(4);
1044 READ32(dummy);
1045 READ_BUF(dummy * 4);
1046 p += dummy;
1047
1048 READ_BUF(4);
1049 READ32(dummy);
1050 READ_BUF(dummy * 4);
1051 p += dummy;
1052
1053 /* ssp_hash_algs<> */
1054 READ_BUF(4);
1055 READ32(dummy);
1056 READ_BUF(dummy);
1057 p += XDR_QUADLEN(dummy);
1058
1059 /* ssp_encr_algs<> */
1060 READ_BUF(4);
1061 READ32(dummy);
1062 READ_BUF(dummy);
1063 p += XDR_QUADLEN(dummy);
1064
1065 /* ssp_window and ssp_num_gss_handles */
1066 READ_BUF(8);
1067 READ32(dummy);
1068 READ32(dummy);
1069 break;
1070 default:
1071 goto xdr_error;
1072 }
1073
1074 /* Ignore Implementation ID */
1075 READ_BUF(4); /* nfs_impl_id4 array length */
1076 READ32(dummy);
1077
1078 if (dummy > 1)
1079 goto xdr_error;
1080
1081 if (dummy == 1) {
1082 /* nii_domain */
1083 READ_BUF(4);
1084 READ32(dummy);
1085 READ_BUF(dummy);
1086 p += XDR_QUADLEN(dummy);
1087
1088 /* nii_name */
1089 READ_BUF(4);
1090 READ32(dummy);
1091 READ_BUF(dummy);
1092 p += XDR_QUADLEN(dummy);
1093
1094 /* nii_date */
1095 READ_BUF(12);
1096 p += 3;
1097 }
1098 DECODE_TAIL;
1099 }
1100
1101 static __be32
1102 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1103 struct nfsd4_create_session *sess)
1104 {
1105 DECODE_HEAD;
1106
1107 u32 dummy;
1108 char *machine_name;
1109 int i;
1110 int nr_secflavs;
1111
1112 READ_BUF(16);
1113 COPYMEM(&sess->clientid, 8);
1114 READ32(sess->seqid);
1115 READ32(sess->flags);
1116
1117 /* Fore channel attrs */
1118 READ_BUF(28);
1119 READ32(dummy); /* headerpadsz is always 0 */
1120 READ32(sess->fore_channel.maxreq_sz);
1121 READ32(sess->fore_channel.maxresp_sz);
1122 READ32(sess->fore_channel.maxresp_cached);
1123 READ32(sess->fore_channel.maxops);
1124 READ32(sess->fore_channel.maxreqs);
1125 READ32(sess->fore_channel.nr_rdma_attrs);
1126 if (sess->fore_channel.nr_rdma_attrs == 1) {
1127 READ_BUF(4);
1128 READ32(sess->fore_channel.rdma_attrs);
1129 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1130 dprintk("Too many fore channel attr bitmaps!\n");
1131 goto xdr_error;
1132 }
1133
1134 /* Back channel attrs */
1135 READ_BUF(28);
1136 READ32(dummy); /* headerpadsz is always 0 */
1137 READ32(sess->back_channel.maxreq_sz);
1138 READ32(sess->back_channel.maxresp_sz);
1139 READ32(sess->back_channel.maxresp_cached);
1140 READ32(sess->back_channel.maxops);
1141 READ32(sess->back_channel.maxreqs);
1142 READ32(sess->back_channel.nr_rdma_attrs);
1143 if (sess->back_channel.nr_rdma_attrs == 1) {
1144 READ_BUF(4);
1145 READ32(sess->back_channel.rdma_attrs);
1146 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1147 dprintk("Too many back channel attr bitmaps!\n");
1148 goto xdr_error;
1149 }
1150
1151 READ_BUF(8);
1152 READ32(sess->callback_prog);
1153
1154 /* callback_sec_params4 */
1155 READ32(nr_secflavs);
1156 for (i = 0; i < nr_secflavs; ++i) {
1157 READ_BUF(4);
1158 READ32(dummy);
1159 switch (dummy) {
1160 case RPC_AUTH_NULL:
1161 /* Nothing to read */
1162 break;
1163 case RPC_AUTH_UNIX:
1164 READ_BUF(8);
1165 /* stamp */
1166 READ32(dummy);
1167
1168 /* machine name */
1169 READ32(dummy);
1170 READ_BUF(dummy);
1171 SAVEMEM(machine_name, dummy);
1172
1173 /* uid, gid */
1174 READ_BUF(8);
1175 READ32(sess->uid);
1176 READ32(sess->gid);
1177
1178 /* more gids */
1179 READ_BUF(4);
1180 READ32(dummy);
1181 READ_BUF(dummy * 4);
1182 for (i = 0; i < dummy; ++i)
1183 READ32(dummy);
1184 break;
1185 case RPC_AUTH_GSS:
1186 dprintk("RPC_AUTH_GSS callback secflavor "
1187 "not supported!\n");
1188 READ_BUF(8);
1189 /* gcbp_service */
1190 READ32(dummy);
1191 /* gcbp_handle_from_server */
1192 READ32(dummy);
1193 READ_BUF(dummy);
1194 p += XDR_QUADLEN(dummy);
1195 /* gcbp_handle_from_client */
1196 READ_BUF(4);
1197 READ32(dummy);
1198 READ_BUF(dummy);
1199 p += XDR_QUADLEN(dummy);
1200 break;
1201 default:
1202 dprintk("Illegal callback secflavor\n");
1203 return nfserr_inval;
1204 }
1205 }
1206 DECODE_TAIL;
1207 }
1208
1209 static __be32
1210 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1211 struct nfsd4_destroy_session *destroy_session)
1212 {
1213 DECODE_HEAD;
1214 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1215 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1216
1217 DECODE_TAIL;
1218 }
1219
1220 static __be32
1221 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1222 struct nfsd4_sequence *seq)
1223 {
1224 DECODE_HEAD;
1225
1226 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1227 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1228 READ32(seq->seqid);
1229 READ32(seq->slotid);
1230 READ32(seq->maxslots);
1231 READ32(seq->cachethis);
1232
1233 DECODE_TAIL;
1234 }
1235
1236 static __be32
1237 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1238 {
1239 return nfs_ok;
1240 }
1241
1242 static __be32
1243 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1244 {
1245 return nfserr_notsupp;
1246 }
1247
1248 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1249
1250 static nfsd4_dec nfsd4_dec_ops[] = {
1251 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1252 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1253 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1254 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1255 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1256 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1257 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1258 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1259 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1260 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1261 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1262 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1263 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1264 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1265 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1266 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1267 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1268 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1269 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1270 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1271 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1272 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1274 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1275 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1276 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1277 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1278 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1279 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1280 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1281 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1282 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1283 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1284 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1285 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1286 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1287 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1288 };
1289
1290 static nfsd4_dec nfsd41_dec_ops[] = {
1291 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1292 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1293 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1294 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1295 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1296 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1297 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1298 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1299 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1300 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1301 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1302 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1303 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1304 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1306 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1307 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1308 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1309 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1310 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1311 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1312 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1314 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1315 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1316 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1317 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1318 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1319 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1320 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1321 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1322 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1323 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1324 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1325 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1326 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1327 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1328
1329 /* new operations for NFSv4.1 */
1330 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1332 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1333 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1334 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1335 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1341 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1344 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 };
1350
1351 struct nfsd4_minorversion_ops {
1352 nfsd4_dec *decoders;
1353 int nops;
1354 };
1355
1356 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1357 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1358 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1359 };
1360
1361 static __be32
1362 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1363 {
1364 DECODE_HEAD;
1365 struct nfsd4_op *op;
1366 struct nfsd4_minorversion_ops *ops;
1367 int i;
1368
1369 /*
1370 * XXX: According to spec, we should check the tag
1371 * for UTF-8 compliance. I'm postponing this for
1372 * now because it seems that some clients do use
1373 * binary tags.
1374 */
1375 READ_BUF(4);
1376 READ32(argp->taglen);
1377 READ_BUF(argp->taglen + 8);
1378 SAVEMEM(argp->tag, argp->taglen);
1379 READ32(argp->minorversion);
1380 READ32(argp->opcnt);
1381
1382 if (argp->taglen > NFSD4_MAX_TAGLEN)
1383 goto xdr_error;
1384 if (argp->opcnt > 100)
1385 goto xdr_error;
1386
1387 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1388 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1389 if (!argp->ops) {
1390 argp->ops = argp->iops;
1391 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1392 goto xdr_error;
1393 }
1394 }
1395
1396 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1397 argp->opcnt = 0;
1398
1399 ops = &nfsd4_minorversion[argp->minorversion];
1400 for (i = 0; i < argp->opcnt; i++) {
1401 op = &argp->ops[i];
1402 op->replay = NULL;
1403
1404 /*
1405 * We can't use READ_BUF() here because we need to handle
1406 * a missing opcode as an OP_WRITE + 1. So we need to check
1407 * to see if we're truly at the end of our buffer or if there
1408 * is another page we need to flip to.
1409 */
1410
1411 if (argp->p == argp->end) {
1412 if (argp->pagelen < 4) {
1413 /* There isn't an opcode still on the wire */
1414 op->opnum = OP_WRITE + 1;
1415 op->status = nfserr_bad_xdr;
1416 argp->opcnt = i+1;
1417 break;
1418 }
1419
1420 /*
1421 * False alarm. We just hit a page boundary, but there
1422 * is still data available. Move pointer across page
1423 * boundary. *snip from READ_BUF*
1424 */
1425 argp->p = page_address(argp->pagelist[0]);
1426 argp->pagelist++;
1427 if (argp->pagelen < PAGE_SIZE) {
1428 argp->end = p + (argp->pagelen>>2);
1429 argp->pagelen = 0;
1430 } else {
1431 argp->end = p + (PAGE_SIZE>>2);
1432 argp->pagelen -= PAGE_SIZE;
1433 }
1434 }
1435 op->opnum = ntohl(*argp->p++);
1436
1437 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1438 op->status = ops->decoders[op->opnum](argp, &op->u);
1439 else {
1440 op->opnum = OP_ILLEGAL;
1441 op->status = nfserr_op_illegal;
1442 }
1443
1444 if (op->status) {
1445 argp->opcnt = i+1;
1446 break;
1447 }
1448 }
1449
1450 DECODE_TAIL;
1451 }
1452
1453 #define WRITE32(n) *p++ = htonl(n)
1454 #define WRITE64(n) do { \
1455 *p++ = htonl((u32)((n) >> 32)); \
1456 *p++ = htonl((u32)(n)); \
1457 } while (0)
1458 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1459 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1460 memcpy(p, ptr, nbytes); \
1461 p += XDR_QUADLEN(nbytes); \
1462 }} while (0)
1463
1464 static void write32(__be32 **p, u32 n)
1465 {
1466 *(*p)++ = n;
1467 }
1468
1469 static void write64(__be32 **p, u64 n)
1470 {
1471 write32(p, (u32)(n >> 32));
1472 write32(p, (u32)n);
1473 }
1474
1475 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1476 {
1477 if (IS_I_VERSION(inode)) {
1478 write64(p, inode->i_version);
1479 } else {
1480 write32(p, stat->ctime.tv_sec);
1481 write32(p, stat->ctime.tv_nsec);
1482 }
1483 }
1484
1485 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1486 {
1487 write32(p, c->atomic);
1488 if (c->change_supported) {
1489 write64(p, c->before_change);
1490 write64(p, c->after_change);
1491 } else {
1492 write32(p, c->before_ctime_sec);
1493 write32(p, c->before_ctime_nsec);
1494 write32(p, c->after_ctime_sec);
1495 write32(p, c->after_ctime_nsec);
1496 }
1497 }
1498
1499 #define RESERVE_SPACE(nbytes) do { \
1500 p = resp->p; \
1501 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1502 } while (0)
1503 #define ADJUST_ARGS() resp->p = p
1504
1505 /*
1506 * Header routine to setup seqid operation replay cache
1507 */
1508 #define ENCODE_SEQID_OP_HEAD \
1509 __be32 *save; \
1510 \
1511 save = resp->p;
1512
1513 /*
1514 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1515 * is where sequence id's are incremented, and the replay cache is filled.
1516 * Note that we increment sequence id's here, at the last moment, so we're sure
1517 * we know whether the error to be returned is a sequence id mutating error.
1518 */
1519
1520 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1521 if (seqid_mutating_err(nfserr) && stateowner) { \
1522 stateowner->so_seqid++; \
1523 stateowner->so_replay.rp_status = nfserr; \
1524 stateowner->so_replay.rp_buflen = \
1525 (((char *)(resp)->p - (char *)save)); \
1526 memcpy(stateowner->so_replay.rp_buf, save, \
1527 stateowner->so_replay.rp_buflen); \
1528 } } while (0);
1529
1530 /* Encode as an array of strings the string given with components
1531 * seperated @sep.
1532 */
1533 static __be32 nfsd4_encode_components(char sep, char *components,
1534 __be32 **pp, int *buflen)
1535 {
1536 __be32 *p = *pp;
1537 __be32 *countp = p;
1538 int strlen, count=0;
1539 char *str, *end;
1540
1541 dprintk("nfsd4_encode_components(%s)\n", components);
1542 if ((*buflen -= 4) < 0)
1543 return nfserr_resource;
1544 WRITE32(0); /* We will fill this in with @count later */
1545 end = str = components;
1546 while (*end) {
1547 for (; *end && (*end != sep); end++)
1548 ; /* Point to end of component */
1549 strlen = end - str;
1550 if (strlen) {
1551 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1552 return nfserr_resource;
1553 WRITE32(strlen);
1554 WRITEMEM(str, strlen);
1555 count++;
1556 }
1557 else
1558 end++;
1559 str = end;
1560 }
1561 *pp = p;
1562 p = countp;
1563 WRITE32(count);
1564 return 0;
1565 }
1566
1567 /*
1568 * encode a location element of a fs_locations structure
1569 */
1570 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1571 __be32 **pp, int *buflen)
1572 {
1573 __be32 status;
1574 __be32 *p = *pp;
1575
1576 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1577 if (status)
1578 return status;
1579 status = nfsd4_encode_components('/', location->path, &p, buflen);
1580 if (status)
1581 return status;
1582 *pp = p;
1583 return 0;
1584 }
1585
1586 /*
1587 * Return the path to an export point in the pseudo filesystem namespace
1588 * Returned string is safe to use as long as the caller holds a reference
1589 * to @exp.
1590 */
1591 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1592 {
1593 struct svc_fh tmp_fh;
1594 char *path = NULL, *rootpath;
1595 size_t rootlen;
1596
1597 fh_init(&tmp_fh, NFS4_FHSIZE);
1598 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1599 if (*stat)
1600 return NULL;
1601 rootpath = tmp_fh.fh_export->ex_pathname;
1602
1603 path = exp->ex_pathname;
1604
1605 rootlen = strlen(rootpath);
1606 if (strncmp(path, rootpath, rootlen)) {
1607 dprintk("nfsd: fs_locations failed;"
1608 "%s is not contained in %s\n", path, rootpath);
1609 *stat = nfserr_notsupp;
1610 path = NULL;
1611 goto out;
1612 }
1613 path += rootlen;
1614 out:
1615 fh_put(&tmp_fh);
1616 return path;
1617 }
1618
1619 /*
1620 * encode a fs_locations structure
1621 */
1622 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1623 struct svc_export *exp,
1624 __be32 **pp, int *buflen)
1625 {
1626 __be32 status;
1627 int i;
1628 __be32 *p = *pp;
1629 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1630 char *root = nfsd4_path(rqstp, exp, &status);
1631
1632 if (status)
1633 return status;
1634 status = nfsd4_encode_components('/', root, &p, buflen);
1635 if (status)
1636 return status;
1637 if ((*buflen -= 4) < 0)
1638 return nfserr_resource;
1639 WRITE32(fslocs->locations_count);
1640 for (i=0; i<fslocs->locations_count; i++) {
1641 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1642 &p, buflen);
1643 if (status)
1644 return status;
1645 }
1646 *pp = p;
1647 return 0;
1648 }
1649
1650 static u32 nfs4_ftypes[16] = {
1651 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1652 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1653 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1654 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1655 };
1656
1657 static __be32
1658 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1659 __be32 **p, int *buflen)
1660 {
1661 int status;
1662
1663 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1664 return nfserr_resource;
1665 if (whotype != NFS4_ACL_WHO_NAMED)
1666 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1667 else if (group)
1668 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1669 else
1670 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1671 if (status < 0)
1672 return nfserrno(status);
1673 *p = xdr_encode_opaque(*p, NULL, status);
1674 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1675 BUG_ON(*buflen < 0);
1676 return 0;
1677 }
1678
1679 static inline __be32
1680 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1681 {
1682 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1683 }
1684
1685 static inline __be32
1686 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1687 {
1688 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1689 }
1690
1691 static inline __be32
1692 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1693 __be32 **p, int *buflen)
1694 {
1695 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1696 }
1697
1698 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1699 FATTR4_WORD0_RDATTR_ERROR)
1700 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1701
1702 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1703 {
1704 /* As per referral draft: */
1705 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1706 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1707 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1708 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1709 *rdattr_err = NFSERR_MOVED;
1710 else
1711 return nfserr_moved;
1712 }
1713 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1714 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1715 return 0;
1716 }
1717
1718 /*
1719 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1720 * ourselves.
1721 *
1722 * @countp is the buffer size in _words_; upon successful return this becomes
1723 * replaced with the number of words written.
1724 */
1725 __be32
1726 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1727 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1728 struct svc_rqst *rqstp, int ignore_crossmnt)
1729 {
1730 u32 bmval0 = bmval[0];
1731 u32 bmval1 = bmval[1];
1732 u32 bmval2 = bmval[2];
1733 struct kstat stat;
1734 struct svc_fh tempfh;
1735 struct kstatfs statfs;
1736 int buflen = *countp << 2;
1737 __be32 *attrlenp;
1738 u32 dummy;
1739 u64 dummy64;
1740 u32 rdattr_err = 0;
1741 __be32 *p = buffer;
1742 __be32 status;
1743 int err;
1744 int aclsupport = 0;
1745 struct nfs4_acl *acl = NULL;
1746 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1747 u32 minorversion = resp->cstate.minorversion;
1748
1749 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1750 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1751 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1752 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1753
1754 if (exp->ex_fslocs.migrated) {
1755 BUG_ON(bmval[2]);
1756 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1757 if (status)
1758 goto out;
1759 }
1760
1761 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1762 if (err)
1763 goto out_nfserr;
1764 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1765 FATTR4_WORD0_MAXNAME)) ||
1766 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1767 FATTR4_WORD1_SPACE_TOTAL))) {
1768 err = vfs_statfs(dentry, &statfs);
1769 if (err)
1770 goto out_nfserr;
1771 }
1772 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1773 fh_init(&tempfh, NFS4_FHSIZE);
1774 status = fh_compose(&tempfh, exp, dentry, NULL);
1775 if (status)
1776 goto out;
1777 fhp = &tempfh;
1778 }
1779 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1780 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1781 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1782 aclsupport = (err == 0);
1783 if (bmval0 & FATTR4_WORD0_ACL) {
1784 if (err == -EOPNOTSUPP)
1785 bmval0 &= ~FATTR4_WORD0_ACL;
1786 else if (err == -EINVAL) {
1787 status = nfserr_attrnotsupp;
1788 goto out;
1789 } else if (err != 0)
1790 goto out_nfserr;
1791 }
1792 }
1793 if ((buflen -= 16) < 0)
1794 goto out_resource;
1795
1796 if (unlikely(bmval2)) {
1797 WRITE32(3);
1798 WRITE32(bmval0);
1799 WRITE32(bmval1);
1800 WRITE32(bmval2);
1801 } else if (likely(bmval1)) {
1802 WRITE32(2);
1803 WRITE32(bmval0);
1804 WRITE32(bmval1);
1805 } else {
1806 WRITE32(1);
1807 WRITE32(bmval0);
1808 }
1809 attrlenp = p++; /* to be backfilled later */
1810
1811 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1812 u32 word0 = nfsd_suppattrs0(minorversion);
1813 u32 word1 = nfsd_suppattrs1(minorversion);
1814 u32 word2 = nfsd_suppattrs2(minorversion);
1815
1816 if ((buflen -= 12) < 0)
1817 goto out_resource;
1818 if (!aclsupport)
1819 word0 &= ~FATTR4_WORD0_ACL;
1820 if (!word2) {
1821 WRITE32(2);
1822 WRITE32(word0);
1823 WRITE32(word1);
1824 } else {
1825 WRITE32(3);
1826 WRITE32(word0);
1827 WRITE32(word1);
1828 WRITE32(word2);
1829 }
1830 }
1831 if (bmval0 & FATTR4_WORD0_TYPE) {
1832 if ((buflen -= 4) < 0)
1833 goto out_resource;
1834 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1835 if (dummy == NF4BAD)
1836 goto out_serverfault;
1837 WRITE32(dummy);
1838 }
1839 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1840 if ((buflen -= 4) < 0)
1841 goto out_resource;
1842 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1843 WRITE32(NFS4_FH_PERSISTENT);
1844 else
1845 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1846 }
1847 if (bmval0 & FATTR4_WORD0_CHANGE) {
1848 if ((buflen -= 8) < 0)
1849 goto out_resource;
1850 write_change(&p, &stat, dentry->d_inode);
1851 }
1852 if (bmval0 & FATTR4_WORD0_SIZE) {
1853 if ((buflen -= 8) < 0)
1854 goto out_resource;
1855 WRITE64(stat.size);
1856 }
1857 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1858 if ((buflen -= 4) < 0)
1859 goto out_resource;
1860 WRITE32(1);
1861 }
1862 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1863 if ((buflen -= 4) < 0)
1864 goto out_resource;
1865 WRITE32(1);
1866 }
1867 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1868 if ((buflen -= 4) < 0)
1869 goto out_resource;
1870 WRITE32(0);
1871 }
1872 if (bmval0 & FATTR4_WORD0_FSID) {
1873 if ((buflen -= 16) < 0)
1874 goto out_resource;
1875 if (exp->ex_fslocs.migrated) {
1876 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1877 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1878 } else switch(fsid_source(fhp)) {
1879 case FSIDSOURCE_FSID:
1880 WRITE64((u64)exp->ex_fsid);
1881 WRITE64((u64)0);
1882 break;
1883 case FSIDSOURCE_DEV:
1884 WRITE32(0);
1885 WRITE32(MAJOR(stat.dev));
1886 WRITE32(0);
1887 WRITE32(MINOR(stat.dev));
1888 break;
1889 case FSIDSOURCE_UUID:
1890 WRITEMEM(exp->ex_uuid, 16);
1891 break;
1892 }
1893 }
1894 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1895 if ((buflen -= 4) < 0)
1896 goto out_resource;
1897 WRITE32(0);
1898 }
1899 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1900 if ((buflen -= 4) < 0)
1901 goto out_resource;
1902 WRITE32(NFSD_LEASE_TIME);
1903 }
1904 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1905 if ((buflen -= 4) < 0)
1906 goto out_resource;
1907 WRITE32(rdattr_err);
1908 }
1909 if (bmval0 & FATTR4_WORD0_ACL) {
1910 struct nfs4_ace *ace;
1911
1912 if (acl == NULL) {
1913 if ((buflen -= 4) < 0)
1914 goto out_resource;
1915
1916 WRITE32(0);
1917 goto out_acl;
1918 }
1919 if ((buflen -= 4) < 0)
1920 goto out_resource;
1921 WRITE32(acl->naces);
1922
1923 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1924 if ((buflen -= 4*3) < 0)
1925 goto out_resource;
1926 WRITE32(ace->type);
1927 WRITE32(ace->flag);
1928 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1929 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1930 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1931 &p, &buflen);
1932 if (status == nfserr_resource)
1933 goto out_resource;
1934 if (status)
1935 goto out;
1936 }
1937 }
1938 out_acl:
1939 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1940 if ((buflen -= 4) < 0)
1941 goto out_resource;
1942 WRITE32(aclsupport ?
1943 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1944 }
1945 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1946 if ((buflen -= 4) < 0)
1947 goto out_resource;
1948 WRITE32(1);
1949 }
1950 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1951 if ((buflen -= 4) < 0)
1952 goto out_resource;
1953 WRITE32(1);
1954 }
1955 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1956 if ((buflen -= 4) < 0)
1957 goto out_resource;
1958 WRITE32(1);
1959 }
1960 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1961 if ((buflen -= 4) < 0)
1962 goto out_resource;
1963 WRITE32(1);
1964 }
1965 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1966 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1967 if (buflen < 0)
1968 goto out_resource;
1969 WRITE32(fhp->fh_handle.fh_size);
1970 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1971 }
1972 if (bmval0 & FATTR4_WORD0_FILEID) {
1973 if ((buflen -= 8) < 0)
1974 goto out_resource;
1975 WRITE64(stat.ino);
1976 }
1977 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1978 if ((buflen -= 8) < 0)
1979 goto out_resource;
1980 WRITE64((u64) statfs.f_ffree);
1981 }
1982 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1983 if ((buflen -= 8) < 0)
1984 goto out_resource;
1985 WRITE64((u64) statfs.f_ffree);
1986 }
1987 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1988 if ((buflen -= 8) < 0)
1989 goto out_resource;
1990 WRITE64((u64) statfs.f_files);
1991 }
1992 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1993 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1994 if (status == nfserr_resource)
1995 goto out_resource;
1996 if (status)
1997 goto out;
1998 }
1999 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2000 if ((buflen -= 4) < 0)
2001 goto out_resource;
2002 WRITE32(1);
2003 }
2004 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2005 if ((buflen -= 8) < 0)
2006 goto out_resource;
2007 WRITE64(~(u64)0);
2008 }
2009 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2010 if ((buflen -= 4) < 0)
2011 goto out_resource;
2012 WRITE32(255);
2013 }
2014 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2015 if ((buflen -= 4) < 0)
2016 goto out_resource;
2017 WRITE32(statfs.f_namelen);
2018 }
2019 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2020 if ((buflen -= 8) < 0)
2021 goto out_resource;
2022 WRITE64((u64) svc_max_payload(rqstp));
2023 }
2024 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2025 if ((buflen -= 8) < 0)
2026 goto out_resource;
2027 WRITE64((u64) svc_max_payload(rqstp));
2028 }
2029 if (bmval1 & FATTR4_WORD1_MODE) {
2030 if ((buflen -= 4) < 0)
2031 goto out_resource;
2032 WRITE32(stat.mode & S_IALLUGO);
2033 }
2034 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2035 if ((buflen -= 4) < 0)
2036 goto out_resource;
2037 WRITE32(1);
2038 }
2039 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2040 if ((buflen -= 4) < 0)
2041 goto out_resource;
2042 WRITE32(stat.nlink);
2043 }
2044 if (bmval1 & FATTR4_WORD1_OWNER) {
2045 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2046 if (status == nfserr_resource)
2047 goto out_resource;
2048 if (status)
2049 goto out;
2050 }
2051 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2052 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2053 if (status == nfserr_resource)
2054 goto out_resource;
2055 if (status)
2056 goto out;
2057 }
2058 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2059 if ((buflen -= 8) < 0)
2060 goto out_resource;
2061 WRITE32((u32) MAJOR(stat.rdev));
2062 WRITE32((u32) MINOR(stat.rdev));
2063 }
2064 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2065 if ((buflen -= 8) < 0)
2066 goto out_resource;
2067 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2068 WRITE64(dummy64);
2069 }
2070 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2071 if ((buflen -= 8) < 0)
2072 goto out_resource;
2073 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2074 WRITE64(dummy64);
2075 }
2076 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2077 if ((buflen -= 8) < 0)
2078 goto out_resource;
2079 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2080 WRITE64(dummy64);
2081 }
2082 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2083 if ((buflen -= 8) < 0)
2084 goto out_resource;
2085 dummy64 = (u64)stat.blocks << 9;
2086 WRITE64(dummy64);
2087 }
2088 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2089 if ((buflen -= 12) < 0)
2090 goto out_resource;
2091 WRITE32(0);
2092 WRITE32(stat.atime.tv_sec);
2093 WRITE32(stat.atime.tv_nsec);
2094 }
2095 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2096 if ((buflen -= 12) < 0)
2097 goto out_resource;
2098 WRITE32(0);
2099 WRITE32(1);
2100 WRITE32(0);
2101 }
2102 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2103 if ((buflen -= 12) < 0)
2104 goto out_resource;
2105 WRITE32(0);
2106 WRITE32(stat.ctime.tv_sec);
2107 WRITE32(stat.ctime.tv_nsec);
2108 }
2109 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2110 if ((buflen -= 12) < 0)
2111 goto out_resource;
2112 WRITE32(0);
2113 WRITE32(stat.mtime.tv_sec);
2114 WRITE32(stat.mtime.tv_nsec);
2115 }
2116 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2117 if ((buflen -= 8) < 0)
2118 goto out_resource;
2119 /*
2120 * Get parent's attributes if not ignoring crossmount
2121 * and this is the root of a cross-mounted filesystem.
2122 */
2123 if (ignore_crossmnt == 0 &&
2124 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2125 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2126 exp->ex_path.mnt->mnt_mountpoint, &stat);
2127 if (err)
2128 goto out_nfserr;
2129 }
2130 WRITE64(stat.ino);
2131 }
2132 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2133 WRITE32(3);
2134 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2135 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2136 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2137 }
2138
2139 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2140 *countp = p - buffer;
2141 status = nfs_ok;
2142
2143 out:
2144 kfree(acl);
2145 if (fhp == &tempfh)
2146 fh_put(&tempfh);
2147 return status;
2148 out_nfserr:
2149 status = nfserrno(err);
2150 goto out;
2151 out_resource:
2152 *countp = 0;
2153 status = nfserr_resource;
2154 goto out;
2155 out_serverfault:
2156 status = nfserr_serverfault;
2157 goto out;
2158 }
2159
2160 static inline int attributes_need_mount(u32 *bmval)
2161 {
2162 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2163 return 1;
2164 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2165 return 1;
2166 return 0;
2167 }
2168
2169 static __be32
2170 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2171 const char *name, int namlen, __be32 *p, int *buflen)
2172 {
2173 struct svc_export *exp = cd->rd_fhp->fh_export;
2174 struct dentry *dentry;
2175 __be32 nfserr;
2176 int ignore_crossmnt = 0;
2177
2178 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2179 if (IS_ERR(dentry))
2180 return nfserrno(PTR_ERR(dentry));
2181 if (!dentry->d_inode) {
2182 /*
2183 * nfsd_buffered_readdir drops the i_mutex between
2184 * readdir and calling this callback, leaving a window
2185 * where this directory entry could have gone away.
2186 */
2187 dput(dentry);
2188 return nfserr_noent;
2189 }
2190
2191 exp_get(exp);
2192 /*
2193 * In the case of a mountpoint, the client may be asking for
2194 * attributes that are only properties of the underlying filesystem
2195 * as opposed to the cross-mounted file system. In such a case,
2196 * we will not follow the cross mount and will fill the attribtutes
2197 * directly from the mountpoint dentry.
2198 */
2199 if (nfsd_mountpoint(dentry, exp)) {
2200 int err;
2201
2202 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2203 && !attributes_need_mount(cd->rd_bmval)) {
2204 ignore_crossmnt = 1;
2205 goto out_encode;
2206 }
2207 /*
2208 * Why the heck aren't we just using nfsd_lookup??
2209 * Different "."/".." handling? Something else?
2210 * At least, add a comment here to explain....
2211 */
2212 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2213 if (err) {
2214 nfserr = nfserrno(err);
2215 goto out_put;
2216 }
2217 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2218 if (nfserr)
2219 goto out_put;
2220
2221 }
2222 out_encode:
2223 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2224 cd->rd_rqstp, ignore_crossmnt);
2225 out_put:
2226 dput(dentry);
2227 exp_put(exp);
2228 return nfserr;
2229 }
2230
2231 static __be32 *
2232 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2233 {
2234 __be32 *attrlenp;
2235
2236 if (buflen < 6)
2237 return NULL;
2238 *p++ = htonl(2);
2239 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2240 *p++ = htonl(0); /* bmval1 */
2241
2242 attrlenp = p++;
2243 *p++ = nfserr; /* no htonl */
2244 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2245 return p;
2246 }
2247
2248 static int
2249 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2250 loff_t offset, u64 ino, unsigned int d_type)
2251 {
2252 struct readdir_cd *ccd = ccdv;
2253 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2254 int buflen;
2255 __be32 *p = cd->buffer;
2256 __be32 *cookiep;
2257 __be32 nfserr = nfserr_toosmall;
2258
2259 /* In nfsv4, "." and ".." never make it onto the wire.. */
2260 if (name && isdotent(name, namlen)) {
2261 cd->common.err = nfs_ok;
2262 return 0;
2263 }
2264
2265 if (cd->offset)
2266 xdr_encode_hyper(cd->offset, (u64) offset);
2267
2268 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2269 if (buflen < 0)
2270 goto fail;
2271
2272 *p++ = xdr_one; /* mark entry present */
2273 cookiep = p;
2274 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2275 p = xdr_encode_array(p, name, namlen); /* name length & name */
2276
2277 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2278 switch (nfserr) {
2279 case nfs_ok:
2280 p += buflen;
2281 break;
2282 case nfserr_resource:
2283 nfserr = nfserr_toosmall;
2284 goto fail;
2285 case nfserr_dropit:
2286 goto fail;
2287 case nfserr_noent:
2288 goto skip_entry;
2289 default:
2290 /*
2291 * If the client requested the RDATTR_ERROR attribute,
2292 * we stuff the error code into this attribute
2293 * and continue. If this attribute was not requested,
2294 * then in accordance with the spec, we fail the
2295 * entire READDIR operation(!)
2296 */
2297 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2298 goto fail;
2299 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2300 if (p == NULL) {
2301 nfserr = nfserr_toosmall;
2302 goto fail;
2303 }
2304 }
2305 cd->buflen -= (p - cd->buffer);
2306 cd->buffer = p;
2307 cd->offset = cookiep;
2308 skip_entry:
2309 cd->common.err = nfs_ok;
2310 return 0;
2311 fail:
2312 cd->common.err = nfserr;
2313 return -EINVAL;
2314 }
2315
2316 static void
2317 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2318 {
2319 __be32 *p;
2320
2321 RESERVE_SPACE(sizeof(stateid_t));
2322 WRITE32(sid->si_generation);
2323 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2324 ADJUST_ARGS();
2325 }
2326
2327 static __be32
2328 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2329 {
2330 __be32 *p;
2331
2332 if (!nfserr) {
2333 RESERVE_SPACE(8);
2334 WRITE32(access->ac_supported);
2335 WRITE32(access->ac_resp_access);
2336 ADJUST_ARGS();
2337 }
2338 return nfserr;
2339 }
2340
2341 static __be32
2342 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2343 {
2344 ENCODE_SEQID_OP_HEAD;
2345
2346 if (!nfserr)
2347 nfsd4_encode_stateid(resp, &close->cl_stateid);
2348
2349 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2350 return nfserr;
2351 }
2352
2353
2354 static __be32
2355 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2356 {
2357 __be32 *p;
2358
2359 if (!nfserr) {
2360 RESERVE_SPACE(8);
2361 WRITEMEM(commit->co_verf.data, 8);
2362 ADJUST_ARGS();
2363 }
2364 return nfserr;
2365 }
2366
2367 static __be32
2368 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2369 {
2370 __be32 *p;
2371
2372 if (!nfserr) {
2373 RESERVE_SPACE(32);
2374 write_cinfo(&p, &create->cr_cinfo);
2375 WRITE32(2);
2376 WRITE32(create->cr_bmval[0]);
2377 WRITE32(create->cr_bmval[1]);
2378 ADJUST_ARGS();
2379 }
2380 return nfserr;
2381 }
2382
2383 static __be32
2384 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2385 {
2386 struct svc_fh *fhp = getattr->ga_fhp;
2387 int buflen;
2388
2389 if (nfserr)
2390 return nfserr;
2391
2392 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2393 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2394 resp->p, &buflen, getattr->ga_bmval,
2395 resp->rqstp, 0);
2396 if (!nfserr)
2397 resp->p += buflen;
2398 return nfserr;
2399 }
2400
2401 static __be32
2402 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2403 {
2404 struct svc_fh *fhp = *fhpp;
2405 unsigned int len;
2406 __be32 *p;
2407
2408 if (!nfserr) {
2409 len = fhp->fh_handle.fh_size;
2410 RESERVE_SPACE(len + 4);
2411 WRITE32(len);
2412 WRITEMEM(&fhp->fh_handle.fh_base, len);
2413 ADJUST_ARGS();
2414 }
2415 return nfserr;
2416 }
2417
2418 /*
2419 * Including all fields other than the name, a LOCK4denied structure requires
2420 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2421 */
2422 static void
2423 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2424 {
2425 __be32 *p;
2426
2427 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2428 WRITE64(ld->ld_start);
2429 WRITE64(ld->ld_length);
2430 WRITE32(ld->ld_type);
2431 if (ld->ld_sop) {
2432 WRITEMEM(&ld->ld_clientid, 8);
2433 WRITE32(ld->ld_sop->so_owner.len);
2434 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2435 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2436 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2437 WRITE64((u64)0); /* clientid */
2438 WRITE32(0); /* length of owner name */
2439 }
2440 ADJUST_ARGS();
2441 }
2442
2443 static __be32
2444 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2445 {
2446 ENCODE_SEQID_OP_HEAD;
2447
2448 if (!nfserr)
2449 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2450 else if (nfserr == nfserr_denied)
2451 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2452
2453 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2454 return nfserr;
2455 }
2456
2457 static __be32
2458 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2459 {
2460 if (nfserr == nfserr_denied)
2461 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2462 return nfserr;
2463 }
2464
2465 static __be32
2466 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2467 {
2468 ENCODE_SEQID_OP_HEAD;
2469
2470 if (!nfserr)
2471 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2472
2473 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2474 return nfserr;
2475 }
2476
2477
2478 static __be32
2479 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2480 {
2481 __be32 *p;
2482
2483 if (!nfserr) {
2484 RESERVE_SPACE(20);
2485 write_cinfo(&p, &link->li_cinfo);
2486 ADJUST_ARGS();
2487 }
2488 return nfserr;
2489 }
2490
2491
2492 static __be32
2493 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2494 {
2495 __be32 *p;
2496 ENCODE_SEQID_OP_HEAD;
2497
2498 if (nfserr)
2499 goto out;
2500
2501 nfsd4_encode_stateid(resp, &open->op_stateid);
2502 RESERVE_SPACE(40);
2503 write_cinfo(&p, &open->op_cinfo);
2504 WRITE32(open->op_rflags);
2505 WRITE32(2);
2506 WRITE32(open->op_bmval[0]);
2507 WRITE32(open->op_bmval[1]);
2508 WRITE32(open->op_delegate_type);
2509 ADJUST_ARGS();
2510
2511 switch (open->op_delegate_type) {
2512 case NFS4_OPEN_DELEGATE_NONE:
2513 break;
2514 case NFS4_OPEN_DELEGATE_READ:
2515 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2516 RESERVE_SPACE(20);
2517 WRITE32(open->op_recall);
2518
2519 /*
2520 * TODO: ACE's in delegations
2521 */
2522 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2523 WRITE32(0);
2524 WRITE32(0);
2525 WRITE32(0); /* XXX: is NULL principal ok? */
2526 ADJUST_ARGS();
2527 break;
2528 case NFS4_OPEN_DELEGATE_WRITE:
2529 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2530 RESERVE_SPACE(32);
2531 WRITE32(0);
2532
2533 /*
2534 * TODO: space_limit's in delegations
2535 */
2536 WRITE32(NFS4_LIMIT_SIZE);
2537 WRITE32(~(u32)0);
2538 WRITE32(~(u32)0);
2539
2540 /*
2541 * TODO: ACE's in delegations
2542 */
2543 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2544 WRITE32(0);
2545 WRITE32(0);
2546 WRITE32(0); /* XXX: is NULL principal ok? */
2547 ADJUST_ARGS();
2548 break;
2549 default:
2550 BUG();
2551 }
2552 /* XXX save filehandle here */
2553 out:
2554 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2555 return nfserr;
2556 }
2557
2558 static __be32
2559 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2560 {
2561 ENCODE_SEQID_OP_HEAD;
2562
2563 if (!nfserr)
2564 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2565
2566 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2567 return nfserr;
2568 }
2569
2570 static __be32
2571 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2572 {
2573 ENCODE_SEQID_OP_HEAD;
2574
2575 if (!nfserr)
2576 nfsd4_encode_stateid(resp, &od->od_stateid);
2577
2578 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2579 return nfserr;
2580 }
2581
2582 static __be32
2583 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2584 struct nfsd4_read *read)
2585 {
2586 u32 eof;
2587 int v, pn;
2588 unsigned long maxcount;
2589 long len;
2590 __be32 *p;
2591
2592 if (nfserr)
2593 return nfserr;
2594 if (resp->xbuf->page_len)
2595 return nfserr_resource;
2596
2597 RESERVE_SPACE(8); /* eof flag and byte count */
2598
2599 maxcount = svc_max_payload(resp->rqstp);
2600 if (maxcount > read->rd_length)
2601 maxcount = read->rd_length;
2602
2603 len = maxcount;
2604 v = 0;
2605 while (len > 0) {
2606 pn = resp->rqstp->rq_resused++;
2607 resp->rqstp->rq_vec[v].iov_base =
2608 page_address(resp->rqstp->rq_respages[pn]);
2609 resp->rqstp->rq_vec[v].iov_len =
2610 len < PAGE_SIZE ? len : PAGE_SIZE;
2611 v++;
2612 len -= PAGE_SIZE;
2613 }
2614 read->rd_vlen = v;
2615
2616 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2617 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2618 &maxcount);
2619
2620 if (nfserr == nfserr_symlink)
2621 nfserr = nfserr_inval;
2622 if (nfserr)
2623 return nfserr;
2624 eof = (read->rd_offset + maxcount >=
2625 read->rd_fhp->fh_dentry->d_inode->i_size);
2626
2627 WRITE32(eof);
2628 WRITE32(maxcount);
2629 ADJUST_ARGS();
2630 resp->xbuf->head[0].iov_len = (char*)p
2631 - (char*)resp->xbuf->head[0].iov_base;
2632 resp->xbuf->page_len = maxcount;
2633
2634 /* Use rest of head for padding and remaining ops: */
2635 resp->xbuf->tail[0].iov_base = p;
2636 resp->xbuf->tail[0].iov_len = 0;
2637 if (maxcount&3) {
2638 RESERVE_SPACE(4);
2639 WRITE32(0);
2640 resp->xbuf->tail[0].iov_base += maxcount&3;
2641 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2642 ADJUST_ARGS();
2643 }
2644 return 0;
2645 }
2646
2647 static __be32
2648 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2649 {
2650 int maxcount;
2651 char *page;
2652 __be32 *p;
2653
2654 if (nfserr)
2655 return nfserr;
2656 if (resp->xbuf->page_len)
2657 return nfserr_resource;
2658
2659 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2660
2661 maxcount = PAGE_SIZE;
2662 RESERVE_SPACE(4);
2663
2664 /*
2665 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2666 * if they would overflow the buffer. Is this kosher in NFSv4? If
2667 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2668 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2669 */
2670 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2671 if (nfserr == nfserr_isdir)
2672 return nfserr_inval;
2673 if (nfserr)
2674 return nfserr;
2675
2676 WRITE32(maxcount);
2677 ADJUST_ARGS();
2678 resp->xbuf->head[0].iov_len = (char*)p
2679 - (char*)resp->xbuf->head[0].iov_base;
2680 resp->xbuf->page_len = maxcount;
2681
2682 /* Use rest of head for padding and remaining ops: */
2683 resp->xbuf->tail[0].iov_base = p;
2684 resp->xbuf->tail[0].iov_len = 0;
2685 if (maxcount&3) {
2686 RESERVE_SPACE(4);
2687 WRITE32(0);
2688 resp->xbuf->tail[0].iov_base += maxcount&3;
2689 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2690 ADJUST_ARGS();
2691 }
2692 return 0;
2693 }
2694
2695 static __be32
2696 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2697 {
2698 int maxcount;
2699 loff_t offset;
2700 __be32 *page, *savep, *tailbase;
2701 __be32 *p;
2702
2703 if (nfserr)
2704 return nfserr;
2705 if (resp->xbuf->page_len)
2706 return nfserr_resource;
2707
2708 RESERVE_SPACE(8); /* verifier */
2709 savep = p;
2710
2711 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2712 WRITE32(0);
2713 WRITE32(0);
2714 ADJUST_ARGS();
2715 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2716 tailbase = p;
2717
2718 maxcount = PAGE_SIZE;
2719 if (maxcount > readdir->rd_maxcount)
2720 maxcount = readdir->rd_maxcount;
2721
2722 /*
2723 * Convert from bytes to words, account for the two words already
2724 * written, make sure to leave two words at the end for the next
2725 * pointer and eof field.
2726 */
2727 maxcount = (maxcount >> 2) - 4;
2728 if (maxcount < 0) {
2729 nfserr = nfserr_toosmall;
2730 goto err_no_verf;
2731 }
2732
2733 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2734 readdir->common.err = 0;
2735 readdir->buflen = maxcount;
2736 readdir->buffer = page;
2737 readdir->offset = NULL;
2738
2739 offset = readdir->rd_cookie;
2740 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2741 &offset,
2742 &readdir->common, nfsd4_encode_dirent);
2743 if (nfserr == nfs_ok &&
2744 readdir->common.err == nfserr_toosmall &&
2745 readdir->buffer == page)
2746 nfserr = nfserr_toosmall;
2747 if (nfserr == nfserr_symlink)
2748 nfserr = nfserr_notdir;
2749 if (nfserr)
2750 goto err_no_verf;
2751
2752 if (readdir->offset)
2753 xdr_encode_hyper(readdir->offset, offset);
2754
2755 p = readdir->buffer;
2756 *p++ = 0; /* no more entries */
2757 *p++ = htonl(readdir->common.err == nfserr_eof);
2758 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2759 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2760
2761 /* Use rest of head for padding and remaining ops: */
2762 resp->xbuf->tail[0].iov_base = tailbase;
2763 resp->xbuf->tail[0].iov_len = 0;
2764 resp->p = resp->xbuf->tail[0].iov_base;
2765 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2766
2767 return 0;
2768 err_no_verf:
2769 p = savep;
2770 ADJUST_ARGS();
2771 return nfserr;
2772 }
2773
2774 static __be32
2775 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2776 {
2777 __be32 *p;
2778
2779 if (!nfserr) {
2780 RESERVE_SPACE(20);
2781 write_cinfo(&p, &remove->rm_cinfo);
2782 ADJUST_ARGS();
2783 }
2784 return nfserr;
2785 }
2786
2787 static __be32
2788 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2789 {
2790 __be32 *p;
2791
2792 if (!nfserr) {
2793 RESERVE_SPACE(40);
2794 write_cinfo(&p, &rename->rn_sinfo);
2795 write_cinfo(&p, &rename->rn_tinfo);
2796 ADJUST_ARGS();
2797 }
2798 return nfserr;
2799 }
2800
2801 static __be32
2802 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2803 struct nfsd4_secinfo *secinfo)
2804 {
2805 int i = 0;
2806 struct svc_export *exp = secinfo->si_exp;
2807 u32 nflavs;
2808 struct exp_flavor_info *flavs;
2809 struct exp_flavor_info def_flavs[2];
2810 __be32 *p;
2811
2812 if (nfserr)
2813 goto out;
2814 if (exp->ex_nflavors) {
2815 flavs = exp->ex_flavors;
2816 nflavs = exp->ex_nflavors;
2817 } else { /* Handling of some defaults in absence of real secinfo: */
2818 flavs = def_flavs;
2819 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2820 nflavs = 2;
2821 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2822 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2823 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2824 nflavs = 1;
2825 flavs[0].pseudoflavor
2826 = svcauth_gss_flavor(exp->ex_client);
2827 } else {
2828 nflavs = 1;
2829 flavs[0].pseudoflavor
2830 = exp->ex_client->flavour->flavour;
2831 }
2832 }
2833
2834 RESERVE_SPACE(4);
2835 WRITE32(nflavs);
2836 ADJUST_ARGS();
2837 for (i = 0; i < nflavs; i++) {
2838 u32 flav = flavs[i].pseudoflavor;
2839 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2840
2841 if (gm) {
2842 RESERVE_SPACE(4);
2843 WRITE32(RPC_AUTH_GSS);
2844 ADJUST_ARGS();
2845 RESERVE_SPACE(4 + gm->gm_oid.len);
2846 WRITE32(gm->gm_oid.len);
2847 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2848 ADJUST_ARGS();
2849 RESERVE_SPACE(4);
2850 WRITE32(0); /* qop */
2851 ADJUST_ARGS();
2852 RESERVE_SPACE(4);
2853 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2854 ADJUST_ARGS();
2855 gss_mech_put(gm);
2856 } else {
2857 RESERVE_SPACE(4);
2858 WRITE32(flav);
2859 ADJUST_ARGS();
2860 }
2861 }
2862 out:
2863 if (exp)
2864 exp_put(exp);
2865 return nfserr;
2866 }
2867
2868 /*
2869 * The SETATTR encode routine is special -- it always encodes a bitmap,
2870 * regardless of the error status.
2871 */
2872 static __be32
2873 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2874 {
2875 __be32 *p;
2876
2877 RESERVE_SPACE(12);
2878 if (nfserr) {
2879 WRITE32(2);
2880 WRITE32(0);
2881 WRITE32(0);
2882 }
2883 else {
2884 WRITE32(2);
2885 WRITE32(setattr->sa_bmval[0]);
2886 WRITE32(setattr->sa_bmval[1]);
2887 }
2888 ADJUST_ARGS();
2889 return nfserr;
2890 }
2891
2892 static __be32
2893 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2894 {
2895 __be32 *p;
2896
2897 if (!nfserr) {
2898 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2899 WRITEMEM(&scd->se_clientid, 8);
2900 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2901 ADJUST_ARGS();
2902 }
2903 else if (nfserr == nfserr_clid_inuse) {
2904 RESERVE_SPACE(8);
2905 WRITE32(0);
2906 WRITE32(0);
2907 ADJUST_ARGS();
2908 }
2909 return nfserr;
2910 }
2911
2912 static __be32
2913 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2914 {
2915 __be32 *p;
2916
2917 if (!nfserr) {
2918 RESERVE_SPACE(16);
2919 WRITE32(write->wr_bytes_written);
2920 WRITE32(write->wr_how_written);
2921 WRITEMEM(write->wr_verifier.data, 8);
2922 ADJUST_ARGS();
2923 }
2924 return nfserr;
2925 }
2926
2927 static __be32
2928 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2929 struct nfsd4_exchange_id *exid)
2930 {
2931 __be32 *p;
2932 char *major_id;
2933 char *server_scope;
2934 int major_id_sz;
2935 int server_scope_sz;
2936 uint64_t minor_id = 0;
2937
2938 if (nfserr)
2939 return nfserr;
2940
2941 major_id = utsname()->nodename;
2942 major_id_sz = strlen(major_id);
2943 server_scope = utsname()->nodename;
2944 server_scope_sz = strlen(server_scope);
2945
2946 RESERVE_SPACE(
2947 8 /* eir_clientid */ +
2948 4 /* eir_sequenceid */ +
2949 4 /* eir_flags */ +
2950 4 /* spr_how (SP4_NONE) */ +
2951 8 /* so_minor_id */ +
2952 4 /* so_major_id.len */ +
2953 (XDR_QUADLEN(major_id_sz) * 4) +
2954 4 /* eir_server_scope.len */ +
2955 (XDR_QUADLEN(server_scope_sz) * 4) +
2956 4 /* eir_server_impl_id.count (0) */);
2957
2958 WRITEMEM(&exid->clientid, 8);
2959 WRITE32(exid->seqid);
2960 WRITE32(exid->flags);
2961
2962 /* state_protect4_r. Currently only support SP4_NONE */
2963 BUG_ON(exid->spa_how != SP4_NONE);
2964 WRITE32(exid->spa_how);
2965
2966 /* The server_owner struct */
2967 WRITE64(minor_id); /* Minor id */
2968 /* major id */
2969 WRITE32(major_id_sz);
2970 WRITEMEM(major_id, major_id_sz);
2971
2972 /* Server scope */
2973 WRITE32(server_scope_sz);
2974 WRITEMEM(server_scope, server_scope_sz);
2975
2976 /* Implementation id */
2977 WRITE32(0); /* zero length nfs_impl_id4 array */
2978 ADJUST_ARGS();
2979 return 0;
2980 }
2981
2982 static __be32
2983 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2984 struct nfsd4_create_session *sess)
2985 {
2986 __be32 *p;
2987
2988 if (nfserr)
2989 return nfserr;
2990
2991 RESERVE_SPACE(24);
2992 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2993 WRITE32(sess->seqid);
2994 WRITE32(sess->flags);
2995 ADJUST_ARGS();
2996
2997 RESERVE_SPACE(28);
2998 WRITE32(0); /* headerpadsz */
2999 WRITE32(sess->fore_channel.maxreq_sz);
3000 WRITE32(sess->fore_channel.maxresp_sz);
3001 WRITE32(sess->fore_channel.maxresp_cached);
3002 WRITE32(sess->fore_channel.maxops);
3003 WRITE32(sess->fore_channel.maxreqs);
3004 WRITE32(sess->fore_channel.nr_rdma_attrs);
3005 ADJUST_ARGS();
3006
3007 if (sess->fore_channel.nr_rdma_attrs) {
3008 RESERVE_SPACE(4);
3009 WRITE32(sess->fore_channel.rdma_attrs);
3010 ADJUST_ARGS();
3011 }
3012
3013 RESERVE_SPACE(28);
3014 WRITE32(0); /* headerpadsz */
3015 WRITE32(sess->back_channel.maxreq_sz);
3016 WRITE32(sess->back_channel.maxresp_sz);
3017 WRITE32(sess->back_channel.maxresp_cached);
3018 WRITE32(sess->back_channel.maxops);
3019 WRITE32(sess->back_channel.maxreqs);
3020 WRITE32(sess->back_channel.nr_rdma_attrs);
3021 ADJUST_ARGS();
3022
3023 if (sess->back_channel.nr_rdma_attrs) {
3024 RESERVE_SPACE(4);
3025 WRITE32(sess->back_channel.rdma_attrs);
3026 ADJUST_ARGS();
3027 }
3028 return 0;
3029 }
3030
3031 static __be32
3032 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3033 struct nfsd4_destroy_session *destroy_session)
3034 {
3035 return nfserr;
3036 }
3037
3038 __be32
3039 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3040 struct nfsd4_sequence *seq)
3041 {
3042 __be32 *p;
3043
3044 if (nfserr)
3045 return nfserr;
3046
3047 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3048 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3049 WRITE32(seq->seqid);
3050 WRITE32(seq->slotid);
3051 WRITE32(seq->maxslots);
3052 /*
3053 * FIXME: for now:
3054 * target_maxslots = maxslots
3055 * status_flags = 0
3056 */
3057 WRITE32(seq->maxslots);
3058 WRITE32(0);
3059
3060 ADJUST_ARGS();
3061 resp->cstate.datap = p; /* DRC cache data pointer */
3062 return 0;
3063 }
3064
3065 static __be32
3066 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3067 {
3068 return nfserr;
3069 }
3070
3071 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3072
3073 /*
3074 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3075 * since we don't need to filter out obsolete ops as this is
3076 * done in the decoding phase.
3077 */
3078 static nfsd4_enc nfsd4_enc_ops[] = {
3079 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3080 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3081 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3082 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3083 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3084 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3085 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3086 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3087 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3088 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3089 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3090 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3091 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3092 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3093 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3094 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3095 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3097 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3098 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3099 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3100 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3101 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3102 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3103 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3104 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3105 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3106 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3107 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3108 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3109 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3110 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3111 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3112 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3113 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3115 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3116
3117 /* NFSv4.1 operations */
3118 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3119 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3121 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3122 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3123 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3125 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3127 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3132 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3133 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3135 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3136 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3137 };
3138
3139 /*
3140 * Calculate the total amount of memory that the compound response has taken
3141 * after encoding the current operation.
3142 *
3143 * pad: add on 8 bytes for the next operation's op_code and status so that
3144 * there is room to cache a failure on the next operation.
3145 *
3146 * Compare this length to the session se_fmaxresp_cached.
3147 *
3148 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3149 * will be at least a page and will therefore hold the xdr_buf head.
3150 */
3151 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3152 {
3153 int status = 0;
3154 struct xdr_buf *xb = &resp->rqstp->rq_res;
3155 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3156 struct nfsd4_session *session = NULL;
3157 struct nfsd4_slot *slot = resp->cstate.slot;
3158 u32 length, tlen = 0, pad = 8;
3159
3160 if (!nfsd4_has_session(&resp->cstate))
3161 return status;
3162
3163 session = resp->cstate.session;
3164 if (session == NULL || slot->sl_cachethis == 0)
3165 return status;
3166
3167 if (resp->opcnt >= args->opcnt)
3168 pad = 0; /* this is the last operation */
3169
3170 if (xb->page_len == 0) {
3171 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3172 } else {
3173 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3174 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3175
3176 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3177 }
3178 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3179 length, xb->page_len, tlen, pad);
3180
3181 if (length <= session->se_fchannel.maxresp_cached)
3182 return status;
3183 else
3184 return nfserr_rep_too_big_to_cache;
3185 }
3186
3187 void
3188 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3189 {
3190 __be32 *statp;
3191 __be32 *p;
3192
3193 RESERVE_SPACE(8);
3194 WRITE32(op->opnum);
3195 statp = p++; /* to be backfilled at the end */
3196 ADJUST_ARGS();
3197
3198 if (op->opnum == OP_ILLEGAL)
3199 goto status;
3200 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3201 !nfsd4_enc_ops[op->opnum]);
3202 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3203 /* nfsd4_check_drc_limit guarantees enough room for error status */
3204 if (!op->status && nfsd4_check_drc_limit(resp))
3205 op->status = nfserr_rep_too_big_to_cache;
3206 status:
3207 /*
3208 * Note: We write the status directly, instead of using WRITE32(),
3209 * since it is already in network byte order.
3210 */
3211 *statp = op->status;
3212 }
3213
3214 /*
3215 * Encode the reply stored in the stateowner reply cache
3216 *
3217 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3218 * previously sent already encoded operation.
3219 *
3220 * called with nfs4_lock_state() held
3221 */
3222 void
3223 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3224 {
3225 __be32 *p;
3226 struct nfs4_replay *rp = op->replay;
3227
3228 BUG_ON(!rp);
3229
3230 RESERVE_SPACE(8);
3231 WRITE32(op->opnum);
3232 *p++ = rp->rp_status; /* already xdr'ed */
3233 ADJUST_ARGS();
3234
3235 RESERVE_SPACE(rp->rp_buflen);
3236 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3237 ADJUST_ARGS();
3238 }
3239
3240 int
3241 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3242 {
3243 return xdr_ressize_check(rqstp, p);
3244 }
3245
3246 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3247 {
3248 if (args->ops != args->iops) {
3249 kfree(args->ops);
3250 args->ops = args->iops;
3251 }
3252 kfree(args->tmpp);
3253 args->tmpp = NULL;
3254 while (args->to_free) {
3255 struct tmpbuf *tb = args->to_free;
3256 args->to_free = tb->next;
3257 tb->release(tb->buf);
3258 kfree(tb);
3259 }
3260 }
3261
3262 int
3263 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3264 {
3265 __be32 status;
3266
3267 args->p = p;
3268 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3269 args->pagelist = rqstp->rq_arg.pages;
3270 args->pagelen = rqstp->rq_arg.page_len;
3271 args->tmpp = NULL;
3272 args->to_free = NULL;
3273 args->ops = args->iops;
3274 args->rqstp = rqstp;
3275
3276 status = nfsd4_decode_compound(args);
3277 if (status) {
3278 nfsd4_release_compoundargs(args);
3279 }
3280 return !status;
3281 }
3282
3283 int
3284 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3285 {
3286 /*
3287 * All that remains is to write the tag and operation count...
3288 */
3289 struct nfsd4_compound_state *cs = &resp->cstate;
3290 struct kvec *iov;
3291 p = resp->tagp;
3292 *p++ = htonl(resp->taglen);
3293 memcpy(p, resp->tag, resp->taglen);
3294 p += XDR_QUADLEN(resp->taglen);
3295 *p++ = htonl(resp->opcnt);
3296
3297 if (rqstp->rq_res.page_len)
3298 iov = &rqstp->rq_res.tail[0];
3299 else
3300 iov = &rqstp->rq_res.head[0];
3301 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3302 BUG_ON(iov->iov_len > PAGE_SIZE);
3303 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
3304 nfsd4_store_cache_entry(resp);
3305 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3306 resp->cstate.slot->sl_inuse = false;
3307 nfsd4_put_session(resp->cstate.session);
3308 }
3309 return 1;
3310 }
3311
3312 /*
3313 * Local variables:
3314 * c-basic-offset: 8
3315 * End:
3316 */
kernel source for telekom puls (alcatel/mediatek)