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x86, AMD: Fix ARAT feature setting again
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4xdr.c
blob4de2837c9c19a27859745b7df8cca370e325ecfa
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 = argp->p + (argp->pagelen>>2);
164 argp->pagelen = 0;
165 } else {
166 argp->end = argp->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 ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
319 return status;
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 ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
330 return status;
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 break;
1183 case RPC_AUTH_GSS:
1184 dprintk("RPC_AUTH_GSS callback secflavor "
1185 "not supported!\n");
1186 READ_BUF(8);
1187 /* gcbp_service */
1188 READ32(dummy);
1189 /* gcbp_handle_from_server */
1190 READ32(dummy);
1191 READ_BUF(dummy);
1192 p += XDR_QUADLEN(dummy);
1193 /* gcbp_handle_from_client */
1194 READ_BUF(4);
1195 READ32(dummy);
1196 READ_BUF(dummy);
1197 break;
1198 default:
1199 dprintk("Illegal callback secflavor\n");
1200 return nfserr_inval;
1201 }
1202 }
1203 DECODE_TAIL;
1204 }
1205
1206 static __be32
1207 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1208 struct nfsd4_destroy_session *destroy_session)
1209 {
1210 DECODE_HEAD;
1211 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1212 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1213
1214 DECODE_TAIL;
1215 }
1216
1217 static __be32
1218 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1219 struct nfsd4_sequence *seq)
1220 {
1221 DECODE_HEAD;
1222
1223 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1224 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1225 READ32(seq->seqid);
1226 READ32(seq->slotid);
1227 READ32(seq->maxslots);
1228 READ32(seq->cachethis);
1229
1230 DECODE_TAIL;
1231 }
1232
1233 static __be32
1234 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1235 {
1236 return nfs_ok;
1237 }
1238
1239 static __be32
1240 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1241 {
1242 return nfserr_notsupp;
1243 }
1244
1245 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1246
1247 static nfsd4_dec nfsd4_dec_ops[] = {
1248 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1249 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1250 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1251 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1252 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1253 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1254 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1255 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1256 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1257 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1258 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1259 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1260 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1261 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1262 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1263 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1264 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1265 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1266 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1267 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1268 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1269 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1270 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1271 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1272 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1274 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1275 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1276 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1277 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1278 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1279 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1280 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1281 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1282 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1283 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1284 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1285 };
1286
1287 static nfsd4_dec nfsd41_dec_ops[] = {
1288 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1289 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1290 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1291 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1292 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1293 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1294 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1295 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1296 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1297 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1298 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1299 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1300 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1301 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1302 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1303 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1304 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1305 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1306 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1307 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1308 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1309 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1311 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1312 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1314 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1315 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1316 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1317 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1318 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1319 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1320 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1321 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1322 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1323 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1324 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1325
1326 /* new operations for NFSv4.1 */
1327 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1328 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1329 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1330 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1331 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1332 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1333 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1334 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1335 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1341 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 };
1347
1348 struct nfsd4_minorversion_ops {
1349 nfsd4_dec *decoders;
1350 int nops;
1351 };
1352
1353 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1354 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1355 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1356 };
1357
1358 static __be32
1359 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1360 {
1361 DECODE_HEAD;
1362 struct nfsd4_op *op;
1363 struct nfsd4_minorversion_ops *ops;
1364 int i;
1365
1366 /*
1367 * XXX: According to spec, we should check the tag
1368 * for UTF-8 compliance. I'm postponing this for
1369 * now because it seems that some clients do use
1370 * binary tags.
1371 */
1372 READ_BUF(4);
1373 READ32(argp->taglen);
1374 READ_BUF(argp->taglen + 8);
1375 SAVEMEM(argp->tag, argp->taglen);
1376 READ32(argp->minorversion);
1377 READ32(argp->opcnt);
1378
1379 if (argp->taglen > NFSD4_MAX_TAGLEN)
1380 goto xdr_error;
1381 if (argp->opcnt > 100)
1382 goto xdr_error;
1383
1384 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1385 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1386 if (!argp->ops) {
1387 argp->ops = argp->iops;
1388 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1389 goto xdr_error;
1390 }
1391 }
1392
1393 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1394 argp->opcnt = 0;
1395
1396 ops = &nfsd4_minorversion[argp->minorversion];
1397 for (i = 0; i < argp->opcnt; i++) {
1398 op = &argp->ops[i];
1399 op->replay = NULL;
1400
1401 /*
1402 * We can't use READ_BUF() here because we need to handle
1403 * a missing opcode as an OP_WRITE + 1. So we need to check
1404 * to see if we're truly at the end of our buffer or if there
1405 * is another page we need to flip to.
1406 */
1407
1408 if (argp->p == argp->end) {
1409 if (argp->pagelen < 4) {
1410 /* There isn't an opcode still on the wire */
1411 op->opnum = OP_WRITE + 1;
1412 op->status = nfserr_bad_xdr;
1413 argp->opcnt = i+1;
1414 break;
1415 }
1416
1417 /*
1418 * False alarm. We just hit a page boundary, but there
1419 * is still data available. Move pointer across page
1420 * boundary. *snip from READ_BUF*
1421 */
1422 argp->p = page_address(argp->pagelist[0]);
1423 argp->pagelist++;
1424 if (argp->pagelen < PAGE_SIZE) {
1425 argp->end = argp->p + (argp->pagelen>>2);
1426 argp->pagelen = 0;
1427 } else {
1428 argp->end = argp->p + (PAGE_SIZE>>2);
1429 argp->pagelen -= PAGE_SIZE;
1430 }
1431 }
1432 op->opnum = ntohl(*argp->p++);
1433
1434 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1435 op->status = ops->decoders[op->opnum](argp, &op->u);
1436 else {
1437 op->opnum = OP_ILLEGAL;
1438 op->status = nfserr_op_illegal;
1439 }
1440
1441 if (op->status) {
1442 argp->opcnt = i+1;
1443 break;
1444 }
1445 }
1446
1447 DECODE_TAIL;
1448 }
1449
1450 #define WRITE32(n) *p++ = htonl(n)
1451 #define WRITE64(n) do { \
1452 *p++ = htonl((u32)((n) >> 32)); \
1453 *p++ = htonl((u32)(n)); \
1454 } while (0)
1455 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1456 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1457 memcpy(p, ptr, nbytes); \
1458 p += XDR_QUADLEN(nbytes); \
1459 }} while (0)
1460
1461 static void write32(__be32 **p, u32 n)
1462 {
1463 *(*p)++ = n;
1464 }
1465
1466 static void write64(__be32 **p, u64 n)
1467 {
1468 write32(p, (u32)(n >> 32));
1469 write32(p, (u32)n);
1470 }
1471
1472 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1473 {
1474 if (IS_I_VERSION(inode)) {
1475 write64(p, inode->i_version);
1476 } else {
1477 write32(p, stat->ctime.tv_sec);
1478 write32(p, stat->ctime.tv_nsec);
1479 }
1480 }
1481
1482 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1483 {
1484 write32(p, c->atomic);
1485 if (c->change_supported) {
1486 write64(p, c->before_change);
1487 write64(p, c->after_change);
1488 } else {
1489 write32(p, c->before_ctime_sec);
1490 write32(p, c->before_ctime_nsec);
1491 write32(p, c->after_ctime_sec);
1492 write32(p, c->after_ctime_nsec);
1493 }
1494 }
1495
1496 #define RESERVE_SPACE(nbytes) do { \
1497 p = resp->p; \
1498 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1499 } while (0)
1500 #define ADJUST_ARGS() resp->p = p
1501
1502 /*
1503 * Header routine to setup seqid operation replay cache
1504 */
1505 #define ENCODE_SEQID_OP_HEAD \
1506 __be32 *save; \
1507 \
1508 save = resp->p;
1509
1510 /*
1511 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1512 * is where sequence id's are incremented, and the replay cache is filled.
1513 * Note that we increment sequence id's here, at the last moment, so we're sure
1514 * we know whether the error to be returned is a sequence id mutating error.
1515 */
1516
1517 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1518 if (seqid_mutating_err(nfserr) && stateowner) { \
1519 stateowner->so_seqid++; \
1520 stateowner->so_replay.rp_status = nfserr; \
1521 stateowner->so_replay.rp_buflen = \
1522 (((char *)(resp)->p - (char *)save)); \
1523 memcpy(stateowner->so_replay.rp_buf, save, \
1524 stateowner->so_replay.rp_buflen); \
1525 } } while (0);
1526
1527 /* Encode as an array of strings the string given with components
1528 * seperated @sep.
1529 */
1530 static __be32 nfsd4_encode_components(char sep, char *components,
1531 __be32 **pp, int *buflen)
1532 {
1533 __be32 *p = *pp;
1534 __be32 *countp = p;
1535 int strlen, count=0;
1536 char *str, *end;
1537
1538 dprintk("nfsd4_encode_components(%s)\n", components);
1539 if ((*buflen -= 4) < 0)
1540 return nfserr_resource;
1541 WRITE32(0); /* We will fill this in with @count later */
1542 end = str = components;
1543 while (*end) {
1544 for (; *end && (*end != sep); end++)
1545 ; /* Point to end of component */
1546 strlen = end - str;
1547 if (strlen) {
1548 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1549 return nfserr_resource;
1550 WRITE32(strlen);
1551 WRITEMEM(str, strlen);
1552 count++;
1553 }
1554 else
1555 end++;
1556 str = end;
1557 }
1558 *pp = p;
1559 p = countp;
1560 WRITE32(count);
1561 return 0;
1562 }
1563
1564 /*
1565 * encode a location element of a fs_locations structure
1566 */
1567 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1568 __be32 **pp, int *buflen)
1569 {
1570 __be32 status;
1571 __be32 *p = *pp;
1572
1573 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1574 if (status)
1575 return status;
1576 status = nfsd4_encode_components('/', location->path, &p, buflen);
1577 if (status)
1578 return status;
1579 *pp = p;
1580 return 0;
1581 }
1582
1583 /*
1584 * Return the path to an export point in the pseudo filesystem namespace
1585 * Returned string is safe to use as long as the caller holds a reference
1586 * to @exp.
1587 */
1588 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1589 {
1590 struct svc_fh tmp_fh;
1591 char *path = NULL, *rootpath;
1592 size_t rootlen;
1593
1594 fh_init(&tmp_fh, NFS4_FHSIZE);
1595 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1596 if (*stat)
1597 return NULL;
1598 rootpath = tmp_fh.fh_export->ex_pathname;
1599
1600 path = exp->ex_pathname;
1601
1602 rootlen = strlen(rootpath);
1603 if (strncmp(path, rootpath, rootlen)) {
1604 dprintk("nfsd: fs_locations failed;"
1605 "%s is not contained in %s\n", path, rootpath);
1606 *stat = nfserr_notsupp;
1607 path = NULL;
1608 goto out;
1609 }
1610 path += rootlen;
1611 out:
1612 fh_put(&tmp_fh);
1613 return path;
1614 }
1615
1616 /*
1617 * encode a fs_locations structure
1618 */
1619 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1620 struct svc_export *exp,
1621 __be32 **pp, int *buflen)
1622 {
1623 __be32 status;
1624 int i;
1625 __be32 *p = *pp;
1626 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1627 char *root = nfsd4_path(rqstp, exp, &status);
1628
1629 if (status)
1630 return status;
1631 status = nfsd4_encode_components('/', root, &p, buflen);
1632 if (status)
1633 return status;
1634 if ((*buflen -= 4) < 0)
1635 return nfserr_resource;
1636 WRITE32(fslocs->locations_count);
1637 for (i=0; i<fslocs->locations_count; i++) {
1638 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1639 &p, buflen);
1640 if (status)
1641 return status;
1642 }
1643 *pp = p;
1644 return 0;
1645 }
1646
1647 static u32 nfs4_ftypes[16] = {
1648 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1649 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1650 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1651 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1652 };
1653
1654 static __be32
1655 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1656 __be32 **p, int *buflen)
1657 {
1658 int status;
1659
1660 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1661 return nfserr_resource;
1662 if (whotype != NFS4_ACL_WHO_NAMED)
1663 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1664 else if (group)
1665 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1666 else
1667 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1668 if (status < 0)
1669 return nfserrno(status);
1670 *p = xdr_encode_opaque(*p, NULL, status);
1671 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1672 BUG_ON(*buflen < 0);
1673 return 0;
1674 }
1675
1676 static inline __be32
1677 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1678 {
1679 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1680 }
1681
1682 static inline __be32
1683 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1684 {
1685 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1686 }
1687
1688 static inline __be32
1689 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1690 __be32 **p, int *buflen)
1691 {
1692 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1693 }
1694
1695 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1696 FATTR4_WORD0_RDATTR_ERROR)
1697 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1698
1699 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1700 {
1701 /* As per referral draft: */
1702 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1703 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1704 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1705 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1706 *rdattr_err = NFSERR_MOVED;
1707 else
1708 return nfserr_moved;
1709 }
1710 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1711 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1712 return 0;
1713 }
1714
1715 /*
1716 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1717 * ourselves.
1718 *
1719 * @countp is the buffer size in _words_; upon successful return this becomes
1720 * replaced with the number of words written.
1721 */
1722 __be32
1723 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1724 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1725 struct svc_rqst *rqstp, int ignore_crossmnt)
1726 {
1727 u32 bmval0 = bmval[0];
1728 u32 bmval1 = bmval[1];
1729 u32 bmval2 = bmval[2];
1730 struct kstat stat;
1731 struct svc_fh tempfh;
1732 struct kstatfs statfs;
1733 int buflen = *countp << 2;
1734 __be32 *attrlenp;
1735 u32 dummy;
1736 u64 dummy64;
1737 u32 rdattr_err = 0;
1738 __be32 *p = buffer;
1739 __be32 status;
1740 int err;
1741 int aclsupport = 0;
1742 struct nfs4_acl *acl = NULL;
1743 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1744 u32 minorversion = resp->cstate.minorversion;
1745
1746 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1747 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1748 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1749 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1750
1751 if (exp->ex_fslocs.migrated) {
1752 BUG_ON(bmval[2]);
1753 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1754 if (status)
1755 goto out;
1756 }
1757
1758 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1759 if (err)
1760 goto out_nfserr;
1761 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1762 FATTR4_WORD0_MAXNAME)) ||
1763 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1764 FATTR4_WORD1_SPACE_TOTAL))) {
1765 err = vfs_statfs(dentry, &statfs);
1766 if (err)
1767 goto out_nfserr;
1768 }
1769 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1770 fh_init(&tempfh, NFS4_FHSIZE);
1771 status = fh_compose(&tempfh, exp, dentry, NULL);
1772 if (status)
1773 goto out;
1774 fhp = &tempfh;
1775 }
1776 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1777 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1778 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1779 aclsupport = (err == 0);
1780 if (bmval0 & FATTR4_WORD0_ACL) {
1781 if (err == -EOPNOTSUPP)
1782 bmval0 &= ~FATTR4_WORD0_ACL;
1783 else if (err == -EINVAL) {
1784 status = nfserr_attrnotsupp;
1785 goto out;
1786 } else if (err != 0)
1787 goto out_nfserr;
1788 }
1789 }
1790 if ((buflen -= 16) < 0)
1791 goto out_resource;
1792
1793 if (unlikely(bmval2)) {
1794 WRITE32(3);
1795 WRITE32(bmval0);
1796 WRITE32(bmval1);
1797 WRITE32(bmval2);
1798 } else if (likely(bmval1)) {
1799 WRITE32(2);
1800 WRITE32(bmval0);
1801 WRITE32(bmval1);
1802 } else {
1803 WRITE32(1);
1804 WRITE32(bmval0);
1805 }
1806 attrlenp = p++; /* to be backfilled later */
1807
1808 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1809 u32 word0 = nfsd_suppattrs0(minorversion);
1810 u32 word1 = nfsd_suppattrs1(minorversion);
1811 u32 word2 = nfsd_suppattrs2(minorversion);
1812
1813 if ((buflen -= 12) < 0)
1814 goto out_resource;
1815 if (!aclsupport)
1816 word0 &= ~FATTR4_WORD0_ACL;
1817 if (!word2) {
1818 WRITE32(2);
1819 WRITE32(word0);
1820 WRITE32(word1);
1821 } else {
1822 WRITE32(3);
1823 WRITE32(word0);
1824 WRITE32(word1);
1825 WRITE32(word2);
1826 }
1827 }
1828 if (bmval0 & FATTR4_WORD0_TYPE) {
1829 if ((buflen -= 4) < 0)
1830 goto out_resource;
1831 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1832 if (dummy == NF4BAD)
1833 goto out_serverfault;
1834 WRITE32(dummy);
1835 }
1836 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1837 if ((buflen -= 4) < 0)
1838 goto out_resource;
1839 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1840 WRITE32(NFS4_FH_PERSISTENT);
1841 else
1842 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1843 }
1844 if (bmval0 & FATTR4_WORD0_CHANGE) {
1845 if ((buflen -= 8) < 0)
1846 goto out_resource;
1847 write_change(&p, &stat, dentry->d_inode);
1848 }
1849 if (bmval0 & FATTR4_WORD0_SIZE) {
1850 if ((buflen -= 8) < 0)
1851 goto out_resource;
1852 WRITE64(stat.size);
1853 }
1854 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1855 if ((buflen -= 4) < 0)
1856 goto out_resource;
1857 WRITE32(1);
1858 }
1859 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1860 if ((buflen -= 4) < 0)
1861 goto out_resource;
1862 WRITE32(1);
1863 }
1864 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1865 if ((buflen -= 4) < 0)
1866 goto out_resource;
1867 WRITE32(0);
1868 }
1869 if (bmval0 & FATTR4_WORD0_FSID) {
1870 if ((buflen -= 16) < 0)
1871 goto out_resource;
1872 if (exp->ex_fslocs.migrated) {
1873 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1874 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1875 } else switch(fsid_source(fhp)) {
1876 case FSIDSOURCE_FSID:
1877 WRITE64((u64)exp->ex_fsid);
1878 WRITE64((u64)0);
1879 break;
1880 case FSIDSOURCE_DEV:
1881 WRITE32(0);
1882 WRITE32(MAJOR(stat.dev));
1883 WRITE32(0);
1884 WRITE32(MINOR(stat.dev));
1885 break;
1886 case FSIDSOURCE_UUID:
1887 WRITEMEM(exp->ex_uuid, 16);
1888 break;
1889 }
1890 }
1891 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1892 if ((buflen -= 4) < 0)
1893 goto out_resource;
1894 WRITE32(0);
1895 }
1896 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1897 if ((buflen -= 4) < 0)
1898 goto out_resource;
1899 WRITE32(NFSD_LEASE_TIME);
1900 }
1901 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1902 if ((buflen -= 4) < 0)
1903 goto out_resource;
1904 WRITE32(rdattr_err);
1905 }
1906 if (bmval0 & FATTR4_WORD0_ACL) {
1907 struct nfs4_ace *ace;
1908
1909 if (acl == NULL) {
1910 if ((buflen -= 4) < 0)
1911 goto out_resource;
1912
1913 WRITE32(0);
1914 goto out_acl;
1915 }
1916 if ((buflen -= 4) < 0)
1917 goto out_resource;
1918 WRITE32(acl->naces);
1919
1920 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1921 if ((buflen -= 4*3) < 0)
1922 goto out_resource;
1923 WRITE32(ace->type);
1924 WRITE32(ace->flag);
1925 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1926 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1927 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1928 &p, &buflen);
1929 if (status == nfserr_resource)
1930 goto out_resource;
1931 if (status)
1932 goto out;
1933 }
1934 }
1935 out_acl:
1936 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1937 if ((buflen -= 4) < 0)
1938 goto out_resource;
1939 WRITE32(aclsupport ?
1940 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1941 }
1942 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1943 if ((buflen -= 4) < 0)
1944 goto out_resource;
1945 WRITE32(1);
1946 }
1947 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1948 if ((buflen -= 4) < 0)
1949 goto out_resource;
1950 WRITE32(1);
1951 }
1952 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1953 if ((buflen -= 4) < 0)
1954 goto out_resource;
1955 WRITE32(1);
1956 }
1957 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1958 if ((buflen -= 4) < 0)
1959 goto out_resource;
1960 WRITE32(1);
1961 }
1962 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1963 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1964 if (buflen < 0)
1965 goto out_resource;
1966 WRITE32(fhp->fh_handle.fh_size);
1967 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1968 }
1969 if (bmval0 & FATTR4_WORD0_FILEID) {
1970 if ((buflen -= 8) < 0)
1971 goto out_resource;
1972 WRITE64(stat.ino);
1973 }
1974 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1975 if ((buflen -= 8) < 0)
1976 goto out_resource;
1977 WRITE64((u64) statfs.f_ffree);
1978 }
1979 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1980 if ((buflen -= 8) < 0)
1981 goto out_resource;
1982 WRITE64((u64) statfs.f_ffree);
1983 }
1984 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1985 if ((buflen -= 8) < 0)
1986 goto out_resource;
1987 WRITE64((u64) statfs.f_files);
1988 }
1989 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1990 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1991 if (status == nfserr_resource)
1992 goto out_resource;
1993 if (status)
1994 goto out;
1995 }
1996 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1997 if ((buflen -= 4) < 0)
1998 goto out_resource;
1999 WRITE32(1);
2000 }
2001 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2002 if ((buflen -= 8) < 0)
2003 goto out_resource;
2004 WRITE64(~(u64)0);
2005 }
2006 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2007 if ((buflen -= 4) < 0)
2008 goto out_resource;
2009 WRITE32(255);
2010 }
2011 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2012 if ((buflen -= 4) < 0)
2013 goto out_resource;
2014 WRITE32(statfs.f_namelen);
2015 }
2016 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2017 if ((buflen -= 8) < 0)
2018 goto out_resource;
2019 WRITE64((u64) svc_max_payload(rqstp));
2020 }
2021 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2022 if ((buflen -= 8) < 0)
2023 goto out_resource;
2024 WRITE64((u64) svc_max_payload(rqstp));
2025 }
2026 if (bmval1 & FATTR4_WORD1_MODE) {
2027 if ((buflen -= 4) < 0)
2028 goto out_resource;
2029 WRITE32(stat.mode & S_IALLUGO);
2030 }
2031 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2032 if ((buflen -= 4) < 0)
2033 goto out_resource;
2034 WRITE32(1);
2035 }
2036 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2037 if ((buflen -= 4) < 0)
2038 goto out_resource;
2039 WRITE32(stat.nlink);
2040 }
2041 if (bmval1 & FATTR4_WORD1_OWNER) {
2042 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2043 if (status == nfserr_resource)
2044 goto out_resource;
2045 if (status)
2046 goto out;
2047 }
2048 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2049 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2050 if (status == nfserr_resource)
2051 goto out_resource;
2052 if (status)
2053 goto out;
2054 }
2055 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2056 if ((buflen -= 8) < 0)
2057 goto out_resource;
2058 WRITE32((u32) MAJOR(stat.rdev));
2059 WRITE32((u32) MINOR(stat.rdev));
2060 }
2061 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2062 if ((buflen -= 8) < 0)
2063 goto out_resource;
2064 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2065 WRITE64(dummy64);
2066 }
2067 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2068 if ((buflen -= 8) < 0)
2069 goto out_resource;
2070 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2071 WRITE64(dummy64);
2072 }
2073 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2074 if ((buflen -= 8) < 0)
2075 goto out_resource;
2076 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2077 WRITE64(dummy64);
2078 }
2079 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2080 if ((buflen -= 8) < 0)
2081 goto out_resource;
2082 dummy64 = (u64)stat.blocks << 9;
2083 WRITE64(dummy64);
2084 }
2085 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2086 if ((buflen -= 12) < 0)
2087 goto out_resource;
2088 WRITE32(0);
2089 WRITE32(stat.atime.tv_sec);
2090 WRITE32(stat.atime.tv_nsec);
2091 }
2092 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2093 if ((buflen -= 12) < 0)
2094 goto out_resource;
2095 WRITE32(0);
2096 WRITE32(1);
2097 WRITE32(0);
2098 }
2099 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2100 if ((buflen -= 12) < 0)
2101 goto out_resource;
2102 WRITE32(0);
2103 WRITE32(stat.ctime.tv_sec);
2104 WRITE32(stat.ctime.tv_nsec);
2105 }
2106 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2107 if ((buflen -= 12) < 0)
2108 goto out_resource;
2109 WRITE32(0);
2110 WRITE32(stat.mtime.tv_sec);
2111 WRITE32(stat.mtime.tv_nsec);
2112 }
2113 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2114 if ((buflen -= 8) < 0)
2115 goto out_resource;
2116 /*
2117 * Get parent's attributes if not ignoring crossmount
2118 * and this is the root of a cross-mounted filesystem.
2119 */
2120 if (ignore_crossmnt == 0 &&
2121 dentry == exp->ex_path.mnt->mnt_root) {
2122 struct path path = exp->ex_path;
2123 path_get(&path);
2124 while (follow_up(&path)) {
2125 if (path.dentry != path.mnt->mnt_root)
2126 break;
2127 }
2128 err = vfs_getattr(path.mnt, path.dentry, &stat);
2129 path_put(&path);
2130 if (err)
2131 goto out_nfserr;
2132 }
2133 WRITE64(stat.ino);
2134 }
2135 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2136 WRITE32(3);
2137 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2138 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2139 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2140 }
2141
2142 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2143 *countp = p - buffer;
2144 status = nfs_ok;
2145
2146 out:
2147 kfree(acl);
2148 if (fhp == &tempfh)
2149 fh_put(&tempfh);
2150 return status;
2151 out_nfserr:
2152 status = nfserrno(err);
2153 goto out;
2154 out_resource:
2155 *countp = 0;
2156 status = nfserr_resource;
2157 goto out;
2158 out_serverfault:
2159 status = nfserr_serverfault;
2160 goto out;
2161 }
2162
2163 static inline int attributes_need_mount(u32 *bmval)
2164 {
2165 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2166 return 1;
2167 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2168 return 1;
2169 return 0;
2170 }
2171
2172 static __be32
2173 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2174 const char *name, int namlen, __be32 *p, int *buflen)
2175 {
2176 struct svc_export *exp = cd->rd_fhp->fh_export;
2177 struct dentry *dentry;
2178 __be32 nfserr;
2179 int ignore_crossmnt = 0;
2180
2181 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2182 if (IS_ERR(dentry))
2183 return nfserrno(PTR_ERR(dentry));
2184 if (!dentry->d_inode) {
2185 /*
2186 * nfsd_buffered_readdir drops the i_mutex between
2187 * readdir and calling this callback, leaving a window
2188 * where this directory entry could have gone away.
2189 */
2190 dput(dentry);
2191 return nfserr_noent;
2192 }
2193
2194 exp_get(exp);
2195 /*
2196 * In the case of a mountpoint, the client may be asking for
2197 * attributes that are only properties of the underlying filesystem
2198 * as opposed to the cross-mounted file system. In such a case,
2199 * we will not follow the cross mount and will fill the attribtutes
2200 * directly from the mountpoint dentry.
2201 */
2202 if (nfsd_mountpoint(dentry, exp)) {
2203 int err;
2204
2205 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2206 && !attributes_need_mount(cd->rd_bmval)) {
2207 ignore_crossmnt = 1;
2208 goto out_encode;
2209 }
2210 /*
2211 * Why the heck aren't we just using nfsd_lookup??
2212 * Different "."/".." handling? Something else?
2213 * At least, add a comment here to explain....
2214 */
2215 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2216 if (err) {
2217 nfserr = nfserrno(err);
2218 goto out_put;
2219 }
2220 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2221 if (nfserr)
2222 goto out_put;
2223
2224 }
2225 out_encode:
2226 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2227 cd->rd_rqstp, ignore_crossmnt);
2228 out_put:
2229 dput(dentry);
2230 exp_put(exp);
2231 return nfserr;
2232 }
2233
2234 static __be32 *
2235 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2236 {
2237 __be32 *attrlenp;
2238
2239 if (buflen < 6)
2240 return NULL;
2241 *p++ = htonl(2);
2242 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2243 *p++ = htonl(0); /* bmval1 */
2244
2245 attrlenp = p++;
2246 *p++ = nfserr; /* no htonl */
2247 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2248 return p;
2249 }
2250
2251 static int
2252 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2253 loff_t offset, u64 ino, unsigned int d_type)
2254 {
2255 struct readdir_cd *ccd = ccdv;
2256 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2257 int buflen;
2258 __be32 *p = cd->buffer;
2259 __be32 *cookiep;
2260 __be32 nfserr = nfserr_toosmall;
2261
2262 /* In nfsv4, "." and ".." never make it onto the wire.. */
2263 if (name && isdotent(name, namlen)) {
2264 cd->common.err = nfs_ok;
2265 return 0;
2266 }
2267
2268 if (cd->offset)
2269 xdr_encode_hyper(cd->offset, (u64) offset);
2270
2271 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2272 if (buflen < 0)
2273 goto fail;
2274
2275 *p++ = xdr_one; /* mark entry present */
2276 cookiep = p;
2277 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2278 p = xdr_encode_array(p, name, namlen); /* name length & name */
2279
2280 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2281 switch (nfserr) {
2282 case nfs_ok:
2283 p += buflen;
2284 break;
2285 case nfserr_resource:
2286 nfserr = nfserr_toosmall;
2287 goto fail;
2288 case nfserr_dropit:
2289 goto fail;
2290 case nfserr_noent:
2291 goto skip_entry;
2292 default:
2293 /*
2294 * If the client requested the RDATTR_ERROR attribute,
2295 * we stuff the error code into this attribute
2296 * and continue. If this attribute was not requested,
2297 * then in accordance with the spec, we fail the
2298 * entire READDIR operation(!)
2299 */
2300 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2301 goto fail;
2302 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2303 if (p == NULL) {
2304 nfserr = nfserr_toosmall;
2305 goto fail;
2306 }
2307 }
2308 cd->buflen -= (p - cd->buffer);
2309 cd->buffer = p;
2310 cd->offset = cookiep;
2311 skip_entry:
2312 cd->common.err = nfs_ok;
2313 return 0;
2314 fail:
2315 cd->common.err = nfserr;
2316 return -EINVAL;
2317 }
2318
2319 static void
2320 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2321 {
2322 __be32 *p;
2323
2324 RESERVE_SPACE(sizeof(stateid_t));
2325 WRITE32(sid->si_generation);
2326 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2327 ADJUST_ARGS();
2328 }
2329
2330 static __be32
2331 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2332 {
2333 __be32 *p;
2334
2335 if (!nfserr) {
2336 RESERVE_SPACE(8);
2337 WRITE32(access->ac_supported);
2338 WRITE32(access->ac_resp_access);
2339 ADJUST_ARGS();
2340 }
2341 return nfserr;
2342 }
2343
2344 static __be32
2345 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2346 {
2347 ENCODE_SEQID_OP_HEAD;
2348
2349 if (!nfserr)
2350 nfsd4_encode_stateid(resp, &close->cl_stateid);
2351
2352 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2353 return nfserr;
2354 }
2355
2356
2357 static __be32
2358 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2359 {
2360 __be32 *p;
2361
2362 if (!nfserr) {
2363 RESERVE_SPACE(8);
2364 WRITEMEM(commit->co_verf.data, 8);
2365 ADJUST_ARGS();
2366 }
2367 return nfserr;
2368 }
2369
2370 static __be32
2371 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2372 {
2373 __be32 *p;
2374
2375 if (!nfserr) {
2376 RESERVE_SPACE(32);
2377 write_cinfo(&p, &create->cr_cinfo);
2378 WRITE32(2);
2379 WRITE32(create->cr_bmval[0]);
2380 WRITE32(create->cr_bmval[1]);
2381 ADJUST_ARGS();
2382 }
2383 return nfserr;
2384 }
2385
2386 static __be32
2387 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2388 {
2389 struct svc_fh *fhp = getattr->ga_fhp;
2390 int buflen;
2391
2392 if (nfserr)
2393 return nfserr;
2394
2395 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2396 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2397 resp->p, &buflen, getattr->ga_bmval,
2398 resp->rqstp, 0);
2399 if (!nfserr)
2400 resp->p += buflen;
2401 return nfserr;
2402 }
2403
2404 static __be32
2405 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2406 {
2407 struct svc_fh *fhp = *fhpp;
2408 unsigned int len;
2409 __be32 *p;
2410
2411 if (!nfserr) {
2412 len = fhp->fh_handle.fh_size;
2413 RESERVE_SPACE(len + 4);
2414 WRITE32(len);
2415 WRITEMEM(&fhp->fh_handle.fh_base, len);
2416 ADJUST_ARGS();
2417 }
2418 return nfserr;
2419 }
2420
2421 /*
2422 * Including all fields other than the name, a LOCK4denied structure requires
2423 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2424 */
2425 static void
2426 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2427 {
2428 __be32 *p;
2429
2430 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2431 WRITE64(ld->ld_start);
2432 WRITE64(ld->ld_length);
2433 WRITE32(ld->ld_type);
2434 if (ld->ld_sop) {
2435 WRITEMEM(&ld->ld_clientid, 8);
2436 WRITE32(ld->ld_sop->so_owner.len);
2437 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2438 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2439 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2440 WRITE64((u64)0); /* clientid */
2441 WRITE32(0); /* length of owner name */
2442 }
2443 ADJUST_ARGS();
2444 }
2445
2446 static __be32
2447 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2448 {
2449 ENCODE_SEQID_OP_HEAD;
2450
2451 if (!nfserr)
2452 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2453 else if (nfserr == nfserr_denied)
2454 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2455
2456 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2457 return nfserr;
2458 }
2459
2460 static __be32
2461 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2462 {
2463 if (nfserr == nfserr_denied)
2464 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2465 return nfserr;
2466 }
2467
2468 static __be32
2469 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2470 {
2471 ENCODE_SEQID_OP_HEAD;
2472
2473 if (!nfserr)
2474 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2475
2476 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2477 return nfserr;
2478 }
2479
2480
2481 static __be32
2482 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2483 {
2484 __be32 *p;
2485
2486 if (!nfserr) {
2487 RESERVE_SPACE(20);
2488 write_cinfo(&p, &link->li_cinfo);
2489 ADJUST_ARGS();
2490 }
2491 return nfserr;
2492 }
2493
2494
2495 static __be32
2496 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2497 {
2498 __be32 *p;
2499 ENCODE_SEQID_OP_HEAD;
2500
2501 if (nfserr)
2502 goto out;
2503
2504 nfsd4_encode_stateid(resp, &open->op_stateid);
2505 RESERVE_SPACE(40);
2506 write_cinfo(&p, &open->op_cinfo);
2507 WRITE32(open->op_rflags);
2508 WRITE32(2);
2509 WRITE32(open->op_bmval[0]);
2510 WRITE32(open->op_bmval[1]);
2511 WRITE32(open->op_delegate_type);
2512 ADJUST_ARGS();
2513
2514 switch (open->op_delegate_type) {
2515 case NFS4_OPEN_DELEGATE_NONE:
2516 break;
2517 case NFS4_OPEN_DELEGATE_READ:
2518 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2519 RESERVE_SPACE(20);
2520 WRITE32(open->op_recall);
2521
2522 /*
2523 * TODO: ACE's in delegations
2524 */
2525 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2526 WRITE32(0);
2527 WRITE32(0);
2528 WRITE32(0); /* XXX: is NULL principal ok? */
2529 ADJUST_ARGS();
2530 break;
2531 case NFS4_OPEN_DELEGATE_WRITE:
2532 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2533 RESERVE_SPACE(32);
2534 WRITE32(0);
2535
2536 /*
2537 * TODO: space_limit's in delegations
2538 */
2539 WRITE32(NFS4_LIMIT_SIZE);
2540 WRITE32(~(u32)0);
2541 WRITE32(~(u32)0);
2542
2543 /*
2544 * TODO: ACE's in delegations
2545 */
2546 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2547 WRITE32(0);
2548 WRITE32(0);
2549 WRITE32(0); /* XXX: is NULL principal ok? */
2550 ADJUST_ARGS();
2551 break;
2552 default:
2553 BUG();
2554 }
2555 /* XXX save filehandle here */
2556 out:
2557 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2558 return nfserr;
2559 }
2560
2561 static __be32
2562 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2563 {
2564 ENCODE_SEQID_OP_HEAD;
2565
2566 if (!nfserr)
2567 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2568
2569 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2570 return nfserr;
2571 }
2572
2573 static __be32
2574 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2575 {
2576 ENCODE_SEQID_OP_HEAD;
2577
2578 if (!nfserr)
2579 nfsd4_encode_stateid(resp, &od->od_stateid);
2580
2581 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2582 return nfserr;
2583 }
2584
2585 static __be32
2586 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2587 struct nfsd4_read *read)
2588 {
2589 u32 eof;
2590 int v, pn;
2591 unsigned long maxcount;
2592 long len;
2593 __be32 *p;
2594
2595 if (nfserr)
2596 return nfserr;
2597 if (resp->xbuf->page_len)
2598 return nfserr_resource;
2599
2600 RESERVE_SPACE(8); /* eof flag and byte count */
2601
2602 maxcount = svc_max_payload(resp->rqstp);
2603 if (maxcount > read->rd_length)
2604 maxcount = read->rd_length;
2605
2606 len = maxcount;
2607 v = 0;
2608 while (len > 0) {
2609 pn = resp->rqstp->rq_resused++;
2610 resp->rqstp->rq_vec[v].iov_base =
2611 page_address(resp->rqstp->rq_respages[pn]);
2612 resp->rqstp->rq_vec[v].iov_len =
2613 len < PAGE_SIZE ? len : PAGE_SIZE;
2614 v++;
2615 len -= PAGE_SIZE;
2616 }
2617 read->rd_vlen = v;
2618
2619 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2620 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2621 &maxcount);
2622
2623 if (nfserr == nfserr_symlink)
2624 nfserr = nfserr_inval;
2625 if (nfserr)
2626 return nfserr;
2627 eof = (read->rd_offset + maxcount >=
2628 read->rd_fhp->fh_dentry->d_inode->i_size);
2629
2630 WRITE32(eof);
2631 WRITE32(maxcount);
2632 ADJUST_ARGS();
2633 resp->xbuf->head[0].iov_len = (char*)p
2634 - (char*)resp->xbuf->head[0].iov_base;
2635 resp->xbuf->page_len = maxcount;
2636
2637 /* Use rest of head for padding and remaining ops: */
2638 resp->xbuf->tail[0].iov_base = p;
2639 resp->xbuf->tail[0].iov_len = 0;
2640 if (maxcount&3) {
2641 RESERVE_SPACE(4);
2642 WRITE32(0);
2643 resp->xbuf->tail[0].iov_base += maxcount&3;
2644 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2645 ADJUST_ARGS();
2646 }
2647 return 0;
2648 }
2649
2650 static __be32
2651 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2652 {
2653 int maxcount;
2654 char *page;
2655 __be32 *p;
2656
2657 if (nfserr)
2658 return nfserr;
2659 if (resp->xbuf->page_len)
2660 return nfserr_resource;
2661
2662 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2663
2664 maxcount = PAGE_SIZE;
2665 RESERVE_SPACE(4);
2666
2667 /*
2668 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2669 * if they would overflow the buffer. Is this kosher in NFSv4? If
2670 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2671 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2672 */
2673 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2674 if (nfserr == nfserr_isdir)
2675 return nfserr_inval;
2676 if (nfserr)
2677 return nfserr;
2678
2679 WRITE32(maxcount);
2680 ADJUST_ARGS();
2681 resp->xbuf->head[0].iov_len = (char*)p
2682 - (char*)resp->xbuf->head[0].iov_base;
2683 resp->xbuf->page_len = maxcount;
2684
2685 /* Use rest of head for padding and remaining ops: */
2686 resp->xbuf->tail[0].iov_base = p;
2687 resp->xbuf->tail[0].iov_len = 0;
2688 if (maxcount&3) {
2689 RESERVE_SPACE(4);
2690 WRITE32(0);
2691 resp->xbuf->tail[0].iov_base += maxcount&3;
2692 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2693 ADJUST_ARGS();
2694 }
2695 return 0;
2696 }
2697
2698 static __be32
2699 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2700 {
2701 int maxcount;
2702 loff_t offset;
2703 __be32 *page, *savep, *tailbase;
2704 __be32 *p;
2705
2706 if (nfserr)
2707 return nfserr;
2708 if (resp->xbuf->page_len)
2709 return nfserr_resource;
2710
2711 RESERVE_SPACE(8); /* verifier */
2712 savep = p;
2713
2714 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2715 WRITE32(0);
2716 WRITE32(0);
2717 ADJUST_ARGS();
2718 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2719 tailbase = p;
2720
2721 maxcount = PAGE_SIZE;
2722 if (maxcount > readdir->rd_maxcount)
2723 maxcount = readdir->rd_maxcount;
2724
2725 /*
2726 * Convert from bytes to words, account for the two words already
2727 * written, make sure to leave two words at the end for the next
2728 * pointer and eof field.
2729 */
2730 maxcount = (maxcount >> 2) - 4;
2731 if (maxcount < 0) {
2732 nfserr = nfserr_toosmall;
2733 goto err_no_verf;
2734 }
2735
2736 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2737 readdir->common.err = 0;
2738 readdir->buflen = maxcount;
2739 readdir->buffer = page;
2740 readdir->offset = NULL;
2741
2742 offset = readdir->rd_cookie;
2743 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2744 &offset,
2745 &readdir->common, nfsd4_encode_dirent);
2746 if (nfserr == nfs_ok &&
2747 readdir->common.err == nfserr_toosmall &&
2748 readdir->buffer == page)
2749 nfserr = nfserr_toosmall;
2750 if (nfserr == nfserr_symlink)
2751 nfserr = nfserr_notdir;
2752 if (nfserr)
2753 goto err_no_verf;
2754
2755 if (readdir->offset)
2756 xdr_encode_hyper(readdir->offset, offset);
2757
2758 p = readdir->buffer;
2759 *p++ = 0; /* no more entries */
2760 *p++ = htonl(readdir->common.err == nfserr_eof);
2761 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2762 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2763
2764 /* Use rest of head for padding and remaining ops: */
2765 resp->xbuf->tail[0].iov_base = tailbase;
2766 resp->xbuf->tail[0].iov_len = 0;
2767 resp->p = resp->xbuf->tail[0].iov_base;
2768 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2769
2770 return 0;
2771 err_no_verf:
2772 p = savep;
2773 ADJUST_ARGS();
2774 return nfserr;
2775 }
2776
2777 static __be32
2778 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2779 {
2780 __be32 *p;
2781
2782 if (!nfserr) {
2783 RESERVE_SPACE(20);
2784 write_cinfo(&p, &remove->rm_cinfo);
2785 ADJUST_ARGS();
2786 }
2787 return nfserr;
2788 }
2789
2790 static __be32
2791 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2792 {
2793 __be32 *p;
2794
2795 if (!nfserr) {
2796 RESERVE_SPACE(40);
2797 write_cinfo(&p, &rename->rn_sinfo);
2798 write_cinfo(&p, &rename->rn_tinfo);
2799 ADJUST_ARGS();
2800 }
2801 return nfserr;
2802 }
2803
2804 static __be32
2805 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2806 struct nfsd4_secinfo *secinfo)
2807 {
2808 int i = 0;
2809 struct svc_export *exp = secinfo->si_exp;
2810 u32 nflavs;
2811 struct exp_flavor_info *flavs;
2812 struct exp_flavor_info def_flavs[2];
2813 __be32 *p;
2814
2815 if (nfserr)
2816 goto out;
2817 if (exp->ex_nflavors) {
2818 flavs = exp->ex_flavors;
2819 nflavs = exp->ex_nflavors;
2820 } else { /* Handling of some defaults in absence of real secinfo: */
2821 flavs = def_flavs;
2822 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2823 nflavs = 2;
2824 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2825 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2826 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2827 nflavs = 1;
2828 flavs[0].pseudoflavor
2829 = svcauth_gss_flavor(exp->ex_client);
2830 } else {
2831 nflavs = 1;
2832 flavs[0].pseudoflavor
2833 = exp->ex_client->flavour->flavour;
2834 }
2835 }
2836
2837 RESERVE_SPACE(4);
2838 WRITE32(nflavs);
2839 ADJUST_ARGS();
2840 for (i = 0; i < nflavs; i++) {
2841 u32 flav = flavs[i].pseudoflavor;
2842 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2843
2844 if (gm) {
2845 RESERVE_SPACE(4);
2846 WRITE32(RPC_AUTH_GSS);
2847 ADJUST_ARGS();
2848 RESERVE_SPACE(4 + gm->gm_oid.len);
2849 WRITE32(gm->gm_oid.len);
2850 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2851 ADJUST_ARGS();
2852 RESERVE_SPACE(4);
2853 WRITE32(0); /* qop */
2854 ADJUST_ARGS();
2855 RESERVE_SPACE(4);
2856 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2857 ADJUST_ARGS();
2858 gss_mech_put(gm);
2859 } else {
2860 RESERVE_SPACE(4);
2861 WRITE32(flav);
2862 ADJUST_ARGS();
2863 }
2864 }
2865 out:
2866 if (exp)
2867 exp_put(exp);
2868 return nfserr;
2869 }
2870
2871 /*
2872 * The SETATTR encode routine is special -- it always encodes a bitmap,
2873 * regardless of the error status.
2874 */
2875 static __be32
2876 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2877 {
2878 __be32 *p;
2879
2880 RESERVE_SPACE(12);
2881 if (nfserr) {
2882 WRITE32(2);
2883 WRITE32(0);
2884 WRITE32(0);
2885 }
2886 else {
2887 WRITE32(2);
2888 WRITE32(setattr->sa_bmval[0]);
2889 WRITE32(setattr->sa_bmval[1]);
2890 }
2891 ADJUST_ARGS();
2892 return nfserr;
2893 }
2894
2895 static __be32
2896 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2897 {
2898 __be32 *p;
2899
2900 if (!nfserr) {
2901 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2902 WRITEMEM(&scd->se_clientid, 8);
2903 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2904 ADJUST_ARGS();
2905 }
2906 else if (nfserr == nfserr_clid_inuse) {
2907 RESERVE_SPACE(8);
2908 WRITE32(0);
2909 WRITE32(0);
2910 ADJUST_ARGS();
2911 }
2912 return nfserr;
2913 }
2914
2915 static __be32
2916 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2917 {
2918 __be32 *p;
2919
2920 if (!nfserr) {
2921 RESERVE_SPACE(16);
2922 WRITE32(write->wr_bytes_written);
2923 WRITE32(write->wr_how_written);
2924 WRITEMEM(write->wr_verifier.data, 8);
2925 ADJUST_ARGS();
2926 }
2927 return nfserr;
2928 }
2929
2930 static __be32
2931 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2932 struct nfsd4_exchange_id *exid)
2933 {
2934 __be32 *p;
2935 char *major_id;
2936 char *server_scope;
2937 int major_id_sz;
2938 int server_scope_sz;
2939 uint64_t minor_id = 0;
2940
2941 if (nfserr)
2942 return nfserr;
2943
2944 major_id = utsname()->nodename;
2945 major_id_sz = strlen(major_id);
2946 server_scope = utsname()->nodename;
2947 server_scope_sz = strlen(server_scope);
2948
2949 RESERVE_SPACE(
2950 8 /* eir_clientid */ +
2951 4 /* eir_sequenceid */ +
2952 4 /* eir_flags */ +
2953 4 /* spr_how (SP4_NONE) */ +
2954 8 /* so_minor_id */ +
2955 4 /* so_major_id.len */ +
2956 (XDR_QUADLEN(major_id_sz) * 4) +
2957 4 /* eir_server_scope.len */ +
2958 (XDR_QUADLEN(server_scope_sz) * 4) +
2959 4 /* eir_server_impl_id.count (0) */);
2960
2961 WRITEMEM(&exid->clientid, 8);
2962 WRITE32(exid->seqid);
2963 WRITE32(exid->flags);
2964
2965 /* state_protect4_r. Currently only support SP4_NONE */
2966 BUG_ON(exid->spa_how != SP4_NONE);
2967 WRITE32(exid->spa_how);
2968
2969 /* The server_owner struct */
2970 WRITE64(minor_id); /* Minor id */
2971 /* major id */
2972 WRITE32(major_id_sz);
2973 WRITEMEM(major_id, major_id_sz);
2974
2975 /* Server scope */
2976 WRITE32(server_scope_sz);
2977 WRITEMEM(server_scope, server_scope_sz);
2978
2979 /* Implementation id */
2980 WRITE32(0); /* zero length nfs_impl_id4 array */
2981 ADJUST_ARGS();
2982 return 0;
2983 }
2984
2985 static __be32
2986 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2987 struct nfsd4_create_session *sess)
2988 {
2989 __be32 *p;
2990
2991 if (nfserr)
2992 return nfserr;
2993
2994 RESERVE_SPACE(24);
2995 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2996 WRITE32(sess->seqid);
2997 WRITE32(sess->flags);
2998 ADJUST_ARGS();
2999
3000 RESERVE_SPACE(28);
3001 WRITE32(0); /* headerpadsz */
3002 WRITE32(sess->fore_channel.maxreq_sz);
3003 WRITE32(sess->fore_channel.maxresp_sz);
3004 WRITE32(sess->fore_channel.maxresp_cached);
3005 WRITE32(sess->fore_channel.maxops);
3006 WRITE32(sess->fore_channel.maxreqs);
3007 WRITE32(sess->fore_channel.nr_rdma_attrs);
3008 ADJUST_ARGS();
3009
3010 if (sess->fore_channel.nr_rdma_attrs) {
3011 RESERVE_SPACE(4);
3012 WRITE32(sess->fore_channel.rdma_attrs);
3013 ADJUST_ARGS();
3014 }
3015
3016 RESERVE_SPACE(28);
3017 WRITE32(0); /* headerpadsz */
3018 WRITE32(sess->back_channel.maxreq_sz);
3019 WRITE32(sess->back_channel.maxresp_sz);
3020 WRITE32(sess->back_channel.maxresp_cached);
3021 WRITE32(sess->back_channel.maxops);
3022 WRITE32(sess->back_channel.maxreqs);
3023 WRITE32(sess->back_channel.nr_rdma_attrs);
3024 ADJUST_ARGS();
3025
3026 if (sess->back_channel.nr_rdma_attrs) {
3027 RESERVE_SPACE(4);
3028 WRITE32(sess->back_channel.rdma_attrs);
3029 ADJUST_ARGS();
3030 }
3031 return 0;
3032 }
3033
3034 static __be32
3035 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3036 struct nfsd4_destroy_session *destroy_session)
3037 {
3038 return nfserr;
3039 }
3040
3041 __be32
3042 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3043 struct nfsd4_sequence *seq)
3044 {
3045 __be32 *p;
3046
3047 if (nfserr)
3048 return nfserr;
3049
3050 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3051 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3052 WRITE32(seq->seqid);
3053 WRITE32(seq->slotid);
3054 WRITE32(seq->maxslots);
3055 /*
3056 * FIXME: for now:
3057 * target_maxslots = maxslots
3058 * status_flags = 0
3059 */
3060 WRITE32(seq->maxslots);
3061 WRITE32(0);
3062
3063 ADJUST_ARGS();
3064 resp->cstate.datap = p; /* DRC cache data pointer */
3065 return 0;
3066 }
3067
3068 static __be32
3069 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3070 {
3071 return nfserr;
3072 }
3073
3074 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3075
3076 /*
3077 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3078 * since we don't need to filter out obsolete ops as this is
3079 * done in the decoding phase.
3080 */
3081 static nfsd4_enc nfsd4_enc_ops[] = {
3082 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3083 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3084 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3085 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3086 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3087 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3088 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3089 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3090 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3091 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3092 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3093 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3094 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3095 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3097 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3098 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3099 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3100 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3101 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3102 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3103 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3104 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3105 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3106 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3107 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3108 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3109 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3110 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3111 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3112 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3113 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3114 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3115 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3116 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3117 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3118 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3119
3120 /* NFSv4.1 operations */
3121 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3122 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3123 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3124 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3125 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3126 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3127 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3132 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3133 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3135 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3136 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3137 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3138 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3139 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3140 };
3141
3142 /*
3143 * Calculate the total amount of memory that the compound response has taken
3144 * after encoding the current operation.
3145 *
3146 * pad: add on 8 bytes for the next operation's op_code and status so that
3147 * there is room to cache a failure on the next operation.
3148 *
3149 * Compare this length to the session se_fmaxresp_cached.
3150 *
3151 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3152 * will be at least a page and will therefore hold the xdr_buf head.
3153 */
3154 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3155 {
3156 int status = 0;
3157 struct xdr_buf *xb = &resp->rqstp->rq_res;
3158 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3159 struct nfsd4_session *session = NULL;
3160 struct nfsd4_slot *slot = resp->cstate.slot;
3161 u32 length, tlen = 0, pad = 8;
3162
3163 if (!nfsd4_has_session(&resp->cstate))
3164 return status;
3165
3166 session = resp->cstate.session;
3167 if (session == NULL || slot->sl_cachethis == 0)
3168 return status;
3169
3170 if (resp->opcnt >= args->opcnt)
3171 pad = 0; /* this is the last operation */
3172
3173 if (xb->page_len == 0) {
3174 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3175 } else {
3176 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3177 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3178
3179 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3180 }
3181 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3182 length, xb->page_len, tlen, pad);
3183
3184 if (length <= session->se_fchannel.maxresp_cached)
3185 return status;
3186 else
3187 return nfserr_rep_too_big_to_cache;
3188 }
3189
3190 void
3191 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3192 {
3193 __be32 *statp;
3194 __be32 *p;
3195
3196 RESERVE_SPACE(8);
3197 WRITE32(op->opnum);
3198 statp = p++; /* to be backfilled at the end */
3199 ADJUST_ARGS();
3200
3201 if (op->opnum == OP_ILLEGAL)
3202 goto status;
3203 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3204 !nfsd4_enc_ops[op->opnum]);
3205 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3206 /* nfsd4_check_drc_limit guarantees enough room for error status */
3207 if (!op->status && nfsd4_check_drc_limit(resp))
3208 op->status = nfserr_rep_too_big_to_cache;
3209 status:
3210 /*
3211 * Note: We write the status directly, instead of using WRITE32(),
3212 * since it is already in network byte order.
3213 */
3214 *statp = op->status;
3215 }
3216
3217 /*
3218 * Encode the reply stored in the stateowner reply cache
3219 *
3220 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3221 * previously sent already encoded operation.
3222 *
3223 * called with nfs4_lock_state() held
3224 */
3225 void
3226 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3227 {
3228 __be32 *p;
3229 struct nfs4_replay *rp = op->replay;
3230
3231 BUG_ON(!rp);
3232
3233 RESERVE_SPACE(8);
3234 WRITE32(op->opnum);
3235 *p++ = rp->rp_status; /* already xdr'ed */
3236 ADJUST_ARGS();
3237
3238 RESERVE_SPACE(rp->rp_buflen);
3239 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3240 ADJUST_ARGS();
3241 }
3242
3243 int
3244 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3245 {
3246 return xdr_ressize_check(rqstp, p);
3247 }
3248
3249 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3250 {
3251 if (args->ops != args->iops) {
3252 kfree(args->ops);
3253 args->ops = args->iops;
3254 }
3255 kfree(args->tmpp);
3256 args->tmpp = NULL;
3257 while (args->to_free) {
3258 struct tmpbuf *tb = args->to_free;
3259 args->to_free = tb->next;
3260 tb->release(tb->buf);
3261 kfree(tb);
3262 }
3263 }
3264
3265 int
3266 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3267 {
3268 __be32 status;
3269
3270 args->p = p;
3271 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3272 args->pagelist = rqstp->rq_arg.pages;
3273 args->pagelen = rqstp->rq_arg.page_len;
3274 args->tmpp = NULL;
3275 args->to_free = NULL;
3276 args->ops = args->iops;
3277 args->rqstp = rqstp;
3278
3279 status = nfsd4_decode_compound(args);
3280 if (status) {
3281 nfsd4_release_compoundargs(args);
3282 }
3283 return !status;
3284 }
3285
3286 int
3287 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3288 {
3289 /*
3290 * All that remains is to write the tag and operation count...
3291 */
3292 struct nfsd4_compound_state *cs = &resp->cstate;
3293 struct kvec *iov;
3294 p = resp->tagp;
3295 *p++ = htonl(resp->taglen);
3296 memcpy(p, resp->tag, resp->taglen);
3297 p += XDR_QUADLEN(resp->taglen);
3298 *p++ = htonl(resp->opcnt);
3299
3300 if (rqstp->rq_res.page_len)
3301 iov = &rqstp->rq_res.tail[0];
3302 else
3303 iov = &rqstp->rq_res.head[0];
3304 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3305 BUG_ON(iov->iov_len > PAGE_SIZE);
3306 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
3307 nfsd4_store_cache_entry(resp);
3308 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3309 resp->cstate.slot->sl_inuse = false;
3310 nfsd4_put_session(resp->cstate.session);
3311 }
3312 return 1;
3313 }
3314
3315 /*
3316 * Local variables:
3317 * c-basic-offset: 8
3318 * End:
3319 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree