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nfsd41: destroy_session operation
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/param.h>
44 #include <linux/smp.h>
45 #include <linux/fs.h>
46 #include <linux/namei.h>
47 #include <linux/vfs.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/xdr.h>
50 #include <linux/sunrpc/svc.h>
51 #include <linux/sunrpc/clnt.h>
52 #include <linux/nfsd/nfsd.h>
53 #include <linux/nfsd/state.h>
54 #include <linux/nfsd/xdr4.h>
55 #include <linux/nfsd_idmap.h>
56 #include <linux/nfs4.h>
57 #include <linux/nfs4_acl.h>
58 #include <linux/sunrpc/gss_api.h>
59 #include <linux/sunrpc/svcauth_gss.h>
60
61 #define NFSDDBG_FACILITY NFSDDBG_XDR
62
63 /*
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
67 */
68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
71 static __be32
72 check_filename(char *str, int len, __be32 err)
73 {
74 int i;
75
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
84 }
85
86 /*
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
91 *
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
95 */
96 #define DECODE_HEAD \
97 __be32 *p; \
98 __be32 status
99 #define DECODE_TAIL \
100 status = 0; \
101 out: \
102 return status; \
103 xdr_error: \
104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
106 status = nfserr_bad_xdr; \
107 goto out
108
109 #define READ32(x) (x) = ntohl(*p++)
110 #define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
113 } while (0)
114 #define READTIME(x) do { \
115 p++; \
116 (x) = ntohl(*p++); \
117 p++; \
118 } while (0)
119 #define READMEM(x,nbytes) do { \
120 x = (char *)p; \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123 #define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
126 (char *)p)) { \
127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
129 goto xdr_error; \
130 } \
131 p += XDR_QUADLEN(nbytes); \
132 } while (0)
133 #define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
136 } while (0)
137
138 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139 #define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
141 p = argp->p; \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
146 goto xdr_error; \
147 } \
148 } while (0)
149
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
151 {
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
156 __be32 *p;
157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
165 kfree(argp->tmpp);
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
179 argp->pagelist++;
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
182 argp->pagelen = 0;
183 } else {
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
186 }
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
189 return p;
190 }
191
192 static int
193 defer_free(struct nfsd4_compoundargs *argp,
194 void (*release)(const void *), void *p)
195 {
196 struct tmpbuf *tb;
197
198 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
199 if (!tb)
200 return -ENOMEM;
201 tb->buf = p;
202 tb->release = release;
203 tb->next = argp->to_free;
204 argp->to_free = tb;
205 return 0;
206 }
207
208 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
209 {
210 if (p == argp->tmp) {
211 p = kmalloc(nbytes, GFP_KERNEL);
212 if (!p)
213 return NULL;
214 memcpy(p, argp->tmp, nbytes);
215 } else {
216 BUG_ON(p != argp->tmpp);
217 argp->tmpp = NULL;
218 }
219 if (defer_free(argp, kfree, p)) {
220 kfree(p);
221 return NULL;
222 } else
223 return (char *)p;
224 }
225
226 static __be32
227 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
228 {
229 u32 bmlen;
230 DECODE_HEAD;
231
232 bmval[0] = 0;
233 bmval[1] = 0;
234
235 READ_BUF(4);
236 READ32(bmlen);
237 if (bmlen > 1000)
238 goto xdr_error;
239
240 READ_BUF(bmlen << 2);
241 if (bmlen > 0)
242 READ32(bmval[0]);
243 if (bmlen > 1)
244 READ32(bmval[1]);
245
246 DECODE_TAIL;
247 }
248
249 static __be32
250 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
251 struct nfs4_acl **acl)
252 {
253 int expected_len, len = 0;
254 u32 dummy32;
255 char *buf;
256 int host_err;
257
258 DECODE_HEAD;
259 iattr->ia_valid = 0;
260 if ((status = nfsd4_decode_bitmap(argp, bmval)))
261 return status;
262
263 /*
264 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
265 * read-only attributes return ERR_INVAL.
266 */
267 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
268 return nfserr_attrnotsupp;
269 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
270 return nfserr_inval;
271
272 READ_BUF(4);
273 READ32(expected_len);
274
275 if (bmval[0] & FATTR4_WORD0_SIZE) {
276 READ_BUF(8);
277 len += 8;
278 READ64(iattr->ia_size);
279 iattr->ia_valid |= ATTR_SIZE;
280 }
281 if (bmval[0] & FATTR4_WORD0_ACL) {
282 int nace;
283 struct nfs4_ace *ace;
284
285 READ_BUF(4); len += 4;
286 READ32(nace);
287
288 if (nace > NFS4_ACL_MAX)
289 return nfserr_resource;
290
291 *acl = nfs4_acl_new(nace);
292 if (*acl == NULL) {
293 host_err = -ENOMEM;
294 goto out_nfserr;
295 }
296 defer_free(argp, kfree, *acl);
297
298 (*acl)->naces = nace;
299 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
300 READ_BUF(16); len += 16;
301 READ32(ace->type);
302 READ32(ace->flag);
303 READ32(ace->access_mask);
304 READ32(dummy32);
305 READ_BUF(dummy32);
306 len += XDR_QUADLEN(dummy32) << 2;
307 READMEM(buf, dummy32);
308 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
309 host_err = 0;
310 if (ace->whotype != NFS4_ACL_WHO_NAMED)
311 ace->who = 0;
312 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
313 host_err = nfsd_map_name_to_gid(argp->rqstp,
314 buf, dummy32, &ace->who);
315 else
316 host_err = nfsd_map_name_to_uid(argp->rqstp,
317 buf, dummy32, &ace->who);
318 if (host_err)
319 goto out_nfserr;
320 }
321 } else
322 *acl = NULL;
323 if (bmval[1] & FATTR4_WORD1_MODE) {
324 READ_BUF(4);
325 len += 4;
326 READ32(iattr->ia_mode);
327 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
328 iattr->ia_valid |= ATTR_MODE;
329 }
330 if (bmval[1] & FATTR4_WORD1_OWNER) {
331 READ_BUF(4);
332 len += 4;
333 READ32(dummy32);
334 READ_BUF(dummy32);
335 len += (XDR_QUADLEN(dummy32) << 2);
336 READMEM(buf, dummy32);
337 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
338 goto out_nfserr;
339 iattr->ia_valid |= ATTR_UID;
340 }
341 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
342 READ_BUF(4);
343 len += 4;
344 READ32(dummy32);
345 READ_BUF(dummy32);
346 len += (XDR_QUADLEN(dummy32) << 2);
347 READMEM(buf, dummy32);
348 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
349 goto out_nfserr;
350 iattr->ia_valid |= ATTR_GID;
351 }
352 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
353 READ_BUF(4);
354 len += 4;
355 READ32(dummy32);
356 switch (dummy32) {
357 case NFS4_SET_TO_CLIENT_TIME:
358 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
359 all 32 bits of 'nseconds'. */
360 READ_BUF(12);
361 len += 12;
362 READ32(dummy32);
363 if (dummy32)
364 return nfserr_inval;
365 READ32(iattr->ia_atime.tv_sec);
366 READ32(iattr->ia_atime.tv_nsec);
367 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
368 return nfserr_inval;
369 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
370 break;
371 case NFS4_SET_TO_SERVER_TIME:
372 iattr->ia_valid |= ATTR_ATIME;
373 break;
374 default:
375 goto xdr_error;
376 }
377 }
378 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
379 READ_BUF(4);
380 len += 4;
381 READ32(dummy32);
382 switch (dummy32) {
383 case NFS4_SET_TO_CLIENT_TIME:
384 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
385 all 32 bits of 'nseconds'. */
386 READ_BUF(12);
387 len += 12;
388 READ32(dummy32);
389 if (dummy32)
390 return nfserr_inval;
391 READ32(iattr->ia_mtime.tv_sec);
392 READ32(iattr->ia_mtime.tv_nsec);
393 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
394 return nfserr_inval;
395 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
396 break;
397 case NFS4_SET_TO_SERVER_TIME:
398 iattr->ia_valid |= ATTR_MTIME;
399 break;
400 default:
401 goto xdr_error;
402 }
403 }
404 if (len != expected_len)
405 goto xdr_error;
406
407 DECODE_TAIL;
408
409 out_nfserr:
410 status = nfserrno(host_err);
411 goto out;
412 }
413
414 static __be32
415 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
416 {
417 DECODE_HEAD;
418
419 READ_BUF(sizeof(stateid_t));
420 READ32(sid->si_generation);
421 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
422
423 DECODE_TAIL;
424 }
425
426 static __be32
427 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
428 {
429 DECODE_HEAD;
430
431 READ_BUF(4);
432 READ32(access->ac_req_access);
433
434 DECODE_TAIL;
435 }
436
437 static __be32
438 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
439 {
440 DECODE_HEAD;
441
442 close->cl_stateowner = NULL;
443 READ_BUF(4);
444 READ32(close->cl_seqid);
445 return nfsd4_decode_stateid(argp, &close->cl_stateid);
446
447 DECODE_TAIL;
448 }
449
450
451 static __be32
452 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
453 {
454 DECODE_HEAD;
455
456 READ_BUF(12);
457 READ64(commit->co_offset);
458 READ32(commit->co_count);
459
460 DECODE_TAIL;
461 }
462
463 static __be32
464 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
465 {
466 DECODE_HEAD;
467
468 READ_BUF(4);
469 READ32(create->cr_type);
470 switch (create->cr_type) {
471 case NF4LNK:
472 READ_BUF(4);
473 READ32(create->cr_linklen);
474 READ_BUF(create->cr_linklen);
475 SAVEMEM(create->cr_linkname, create->cr_linklen);
476 break;
477 case NF4BLK:
478 case NF4CHR:
479 READ_BUF(8);
480 READ32(create->cr_specdata1);
481 READ32(create->cr_specdata2);
482 break;
483 case NF4SOCK:
484 case NF4FIFO:
485 case NF4DIR:
486 default:
487 break;
488 }
489
490 READ_BUF(4);
491 READ32(create->cr_namelen);
492 READ_BUF(create->cr_namelen);
493 SAVEMEM(create->cr_name, create->cr_namelen);
494 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
495 return status;
496
497 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
498 goto out;
499
500 DECODE_TAIL;
501 }
502
503 static inline __be32
504 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
505 {
506 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
507 }
508
509 static inline __be32
510 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
511 {
512 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
513 }
514
515 static __be32
516 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
517 {
518 DECODE_HEAD;
519
520 READ_BUF(4);
521 READ32(link->li_namelen);
522 READ_BUF(link->li_namelen);
523 SAVEMEM(link->li_name, link->li_namelen);
524 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
525 return status;
526
527 DECODE_TAIL;
528 }
529
530 static __be32
531 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
532 {
533 DECODE_HEAD;
534
535 lock->lk_replay_owner = NULL;
536 /*
537 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
538 */
539 READ_BUF(28);
540 READ32(lock->lk_type);
541 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
542 goto xdr_error;
543 READ32(lock->lk_reclaim);
544 READ64(lock->lk_offset);
545 READ64(lock->lk_length);
546 READ32(lock->lk_is_new);
547
548 if (lock->lk_is_new) {
549 READ_BUF(4);
550 READ32(lock->lk_new_open_seqid);
551 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
552 if (status)
553 return status;
554 READ_BUF(8 + sizeof(clientid_t));
555 READ32(lock->lk_new_lock_seqid);
556 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
557 READ32(lock->lk_new_owner.len);
558 READ_BUF(lock->lk_new_owner.len);
559 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
560 } else {
561 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
562 if (status)
563 return status;
564 READ_BUF(4);
565 READ32(lock->lk_old_lock_seqid);
566 }
567
568 DECODE_TAIL;
569 }
570
571 static __be32
572 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
573 {
574 DECODE_HEAD;
575
576 READ_BUF(32);
577 READ32(lockt->lt_type);
578 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
579 goto xdr_error;
580 READ64(lockt->lt_offset);
581 READ64(lockt->lt_length);
582 COPYMEM(&lockt->lt_clientid, 8);
583 READ32(lockt->lt_owner.len);
584 READ_BUF(lockt->lt_owner.len);
585 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
586
587 DECODE_TAIL;
588 }
589
590 static __be32
591 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
592 {
593 DECODE_HEAD;
594
595 locku->lu_stateowner = NULL;
596 READ_BUF(8);
597 READ32(locku->lu_type);
598 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
599 goto xdr_error;
600 READ32(locku->lu_seqid);
601 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
602 if (status)
603 return status;
604 READ_BUF(16);
605 READ64(locku->lu_offset);
606 READ64(locku->lu_length);
607
608 DECODE_TAIL;
609 }
610
611 static __be32
612 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
613 {
614 DECODE_HEAD;
615
616 READ_BUF(4);
617 READ32(lookup->lo_len);
618 READ_BUF(lookup->lo_len);
619 SAVEMEM(lookup->lo_name, lookup->lo_len);
620 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
621 return status;
622
623 DECODE_TAIL;
624 }
625
626 static __be32
627 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
628 {
629 DECODE_HEAD;
630
631 memset(open->op_bmval, 0, sizeof(open->op_bmval));
632 open->op_iattr.ia_valid = 0;
633 open->op_stateowner = NULL;
634
635 /* seqid, share_access, share_deny, clientid, ownerlen */
636 READ_BUF(16 + sizeof(clientid_t));
637 READ32(open->op_seqid);
638 READ32(open->op_share_access);
639 READ32(open->op_share_deny);
640 COPYMEM(&open->op_clientid, sizeof(clientid_t));
641 READ32(open->op_owner.len);
642
643 /* owner, open_flag */
644 READ_BUF(open->op_owner.len + 4);
645 SAVEMEM(open->op_owner.data, open->op_owner.len);
646 READ32(open->op_create);
647 switch (open->op_create) {
648 case NFS4_OPEN_NOCREATE:
649 break;
650 case NFS4_OPEN_CREATE:
651 READ_BUF(4);
652 READ32(open->op_createmode);
653 switch (open->op_createmode) {
654 case NFS4_CREATE_UNCHECKED:
655 case NFS4_CREATE_GUARDED:
656 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
657 goto out;
658 break;
659 case NFS4_CREATE_EXCLUSIVE:
660 READ_BUF(8);
661 COPYMEM(open->op_verf.data, 8);
662 break;
663 default:
664 goto xdr_error;
665 }
666 break;
667 default:
668 goto xdr_error;
669 }
670
671 /* open_claim */
672 READ_BUF(4);
673 READ32(open->op_claim_type);
674 switch (open->op_claim_type) {
675 case NFS4_OPEN_CLAIM_NULL:
676 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
677 READ_BUF(4);
678 READ32(open->op_fname.len);
679 READ_BUF(open->op_fname.len);
680 SAVEMEM(open->op_fname.data, open->op_fname.len);
681 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
682 return status;
683 break;
684 case NFS4_OPEN_CLAIM_PREVIOUS:
685 READ_BUF(4);
686 READ32(open->op_delegate_type);
687 break;
688 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
689 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
690 if (status)
691 return status;
692 READ_BUF(4);
693 READ32(open->op_fname.len);
694 READ_BUF(open->op_fname.len);
695 SAVEMEM(open->op_fname.data, open->op_fname.len);
696 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
697 return status;
698 break;
699 default:
700 goto xdr_error;
701 }
702
703 DECODE_TAIL;
704 }
705
706 static __be32
707 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
708 {
709 DECODE_HEAD;
710
711 open_conf->oc_stateowner = NULL;
712 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
713 if (status)
714 return status;
715 READ_BUF(4);
716 READ32(open_conf->oc_seqid);
717
718 DECODE_TAIL;
719 }
720
721 static __be32
722 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
723 {
724 DECODE_HEAD;
725
726 open_down->od_stateowner = NULL;
727 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
728 if (status)
729 return status;
730 READ_BUF(12);
731 READ32(open_down->od_seqid);
732 READ32(open_down->od_share_access);
733 READ32(open_down->od_share_deny);
734
735 DECODE_TAIL;
736 }
737
738 static __be32
739 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
740 {
741 DECODE_HEAD;
742
743 READ_BUF(4);
744 READ32(putfh->pf_fhlen);
745 if (putfh->pf_fhlen > NFS4_FHSIZE)
746 goto xdr_error;
747 READ_BUF(putfh->pf_fhlen);
748 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
749
750 DECODE_TAIL;
751 }
752
753 static __be32
754 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
755 {
756 DECODE_HEAD;
757
758 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
762 READ64(read->rd_offset);
763 READ32(read->rd_length);
764
765 DECODE_TAIL;
766 }
767
768 static __be32
769 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
770 {
771 DECODE_HEAD;
772
773 READ_BUF(24);
774 READ64(readdir->rd_cookie);
775 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
776 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
777 READ32(readdir->rd_maxcount);
778 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
779 goto out;
780
781 DECODE_TAIL;
782 }
783
784 static __be32
785 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
786 {
787 DECODE_HEAD;
788
789 READ_BUF(4);
790 READ32(remove->rm_namelen);
791 READ_BUF(remove->rm_namelen);
792 SAVEMEM(remove->rm_name, remove->rm_namelen);
793 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
794 return status;
795
796 DECODE_TAIL;
797 }
798
799 static __be32
800 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
801 {
802 DECODE_HEAD;
803
804 READ_BUF(4);
805 READ32(rename->rn_snamelen);
806 READ_BUF(rename->rn_snamelen + 4);
807 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
808 READ32(rename->rn_tnamelen);
809 READ_BUF(rename->rn_tnamelen);
810 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
811 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
812 return status;
813 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
814 return status;
815
816 DECODE_TAIL;
817 }
818
819 static __be32
820 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
821 {
822 DECODE_HEAD;
823
824 READ_BUF(sizeof(clientid_t));
825 COPYMEM(clientid, sizeof(clientid_t));
826
827 DECODE_TAIL;
828 }
829
830 static __be32
831 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
832 struct nfsd4_secinfo *secinfo)
833 {
834 DECODE_HEAD;
835
836 READ_BUF(4);
837 READ32(secinfo->si_namelen);
838 READ_BUF(secinfo->si_namelen);
839 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
840 status = check_filename(secinfo->si_name, secinfo->si_namelen,
841 nfserr_noent);
842 if (status)
843 return status;
844 DECODE_TAIL;
845 }
846
847 static __be32
848 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
849 {
850 __be32 status;
851
852 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
853 if (status)
854 return status;
855 return nfsd4_decode_fattr(argp, setattr->sa_bmval,
856 &setattr->sa_iattr, &setattr->sa_acl);
857 }
858
859 static __be32
860 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
861 {
862 DECODE_HEAD;
863
864 READ_BUF(12);
865 COPYMEM(setclientid->se_verf.data, 8);
866 READ32(setclientid->se_namelen);
867
868 READ_BUF(setclientid->se_namelen + 8);
869 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
870 READ32(setclientid->se_callback_prog);
871 READ32(setclientid->se_callback_netid_len);
872
873 READ_BUF(setclientid->se_callback_netid_len + 4);
874 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
875 READ32(setclientid->se_callback_addr_len);
876
877 READ_BUF(setclientid->se_callback_addr_len + 4);
878 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
879 READ32(setclientid->se_callback_ident);
880
881 DECODE_TAIL;
882 }
883
884 static __be32
885 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
886 {
887 DECODE_HEAD;
888
889 READ_BUF(8 + sizeof(nfs4_verifier));
890 COPYMEM(&scd_c->sc_clientid, 8);
891 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
892
893 DECODE_TAIL;
894 }
895
896 /* Also used for NVERIFY */
897 static __be32
898 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
899 {
900 #if 0
901 struct nfsd4_compoundargs save = {
902 .p = argp->p,
903 .end = argp->end,
904 .rqstp = argp->rqstp,
905 };
906 u32 ve_bmval[2];
907 struct iattr ve_iattr; /* request */
908 struct nfs4_acl *ve_acl; /* request */
909 #endif
910 DECODE_HEAD;
911
912 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
913 goto out;
914
915 /* For convenience's sake, we compare raw xdr'd attributes in
916 * nfsd4_proc_verify; however we still decode here just to return
917 * correct error in case of bad xdr. */
918 #if 0
919 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
920 if (status == nfserr_inval) {
921 status = nfserrno(status);
922 goto out;
923 }
924 #endif
925 READ_BUF(4);
926 READ32(verify->ve_attrlen);
927 READ_BUF(verify->ve_attrlen);
928 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
929
930 DECODE_TAIL;
931 }
932
933 static __be32
934 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
935 {
936 int avail;
937 int v;
938 int len;
939 DECODE_HEAD;
940
941 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
942 if (status)
943 return status;
944 READ_BUF(16);
945 READ64(write->wr_offset);
946 READ32(write->wr_stable_how);
947 if (write->wr_stable_how > 2)
948 goto xdr_error;
949 READ32(write->wr_buflen);
950
951 /* Sorry .. no magic macros for this.. *
952 * READ_BUF(write->wr_buflen);
953 * SAVEMEM(write->wr_buf, write->wr_buflen);
954 */
955 avail = (char*)argp->end - (char*)argp->p;
956 if (avail + argp->pagelen < write->wr_buflen) {
957 dprintk("NFSD: xdr error (%s:%d)\n",
958 __FILE__, __LINE__);
959 goto xdr_error;
960 }
961 argp->rqstp->rq_vec[0].iov_base = p;
962 argp->rqstp->rq_vec[0].iov_len = avail;
963 v = 0;
964 len = write->wr_buflen;
965 while (len > argp->rqstp->rq_vec[v].iov_len) {
966 len -= argp->rqstp->rq_vec[v].iov_len;
967 v++;
968 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
969 argp->pagelist++;
970 if (argp->pagelen >= PAGE_SIZE) {
971 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
972 argp->pagelen -= PAGE_SIZE;
973 } else {
974 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
975 argp->pagelen -= len;
976 }
977 }
978 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
979 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
980 argp->rqstp->rq_vec[v].iov_len = len;
981 write->wr_vlen = v+1;
982
983 DECODE_TAIL;
984 }
985
986 static __be32
987 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
988 {
989 DECODE_HEAD;
990
991 READ_BUF(12);
992 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
993 READ32(rlockowner->rl_owner.len);
994 READ_BUF(rlockowner->rl_owner.len);
995 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
996
997 DECODE_TAIL;
998 }
999
1000 static __be32
1001 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1002 struct nfsd4_exchange_id *exid)
1003 {
1004 int dummy;
1005 DECODE_HEAD;
1006
1007 READ_BUF(NFS4_VERIFIER_SIZE);
1008 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1009
1010 READ_BUF(4);
1011 READ32(exid->clname.len);
1012
1013 READ_BUF(exid->clname.len);
1014 SAVEMEM(exid->clname.data, exid->clname.len);
1015
1016 READ_BUF(4);
1017 READ32(exid->flags);
1018
1019 /* Ignore state_protect4_a */
1020 READ_BUF(4);
1021 READ32(exid->spa_how);
1022 switch (exid->spa_how) {
1023 case SP4_NONE:
1024 break;
1025 case SP4_MACH_CRED:
1026 /* spo_must_enforce */
1027 READ_BUF(4);
1028 READ32(dummy);
1029 READ_BUF(dummy * 4);
1030 p += dummy;
1031
1032 /* spo_must_allow */
1033 READ_BUF(4);
1034 READ32(dummy);
1035 READ_BUF(dummy * 4);
1036 p += dummy;
1037 break;
1038 case SP4_SSV:
1039 /* ssp_ops */
1040 READ_BUF(4);
1041 READ32(dummy);
1042 READ_BUF(dummy * 4);
1043 p += dummy;
1044
1045 READ_BUF(4);
1046 READ32(dummy);
1047 READ_BUF(dummy * 4);
1048 p += dummy;
1049
1050 /* ssp_hash_algs<> */
1051 READ_BUF(4);
1052 READ32(dummy);
1053 READ_BUF(dummy);
1054 p += XDR_QUADLEN(dummy);
1055
1056 /* ssp_encr_algs<> */
1057 READ_BUF(4);
1058 READ32(dummy);
1059 READ_BUF(dummy);
1060 p += XDR_QUADLEN(dummy);
1061
1062 /* ssp_window and ssp_num_gss_handles */
1063 READ_BUF(8);
1064 READ32(dummy);
1065 READ32(dummy);
1066 break;
1067 default:
1068 goto xdr_error;
1069 }
1070
1071 /* Ignore Implementation ID */
1072 READ_BUF(4); /* nfs_impl_id4 array length */
1073 READ32(dummy);
1074
1075 if (dummy > 1)
1076 goto xdr_error;
1077
1078 if (dummy == 1) {
1079 /* nii_domain */
1080 READ_BUF(4);
1081 READ32(dummy);
1082 READ_BUF(dummy);
1083 p += XDR_QUADLEN(dummy);
1084
1085 /* nii_name */
1086 READ_BUF(4);
1087 READ32(dummy);
1088 READ_BUF(dummy);
1089 p += XDR_QUADLEN(dummy);
1090
1091 /* nii_date */
1092 READ_BUF(12);
1093 p += 3;
1094 }
1095 DECODE_TAIL;
1096 }
1097
1098 static __be32
1099 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1100 struct nfsd4_create_session *sess)
1101 {
1102 DECODE_HEAD;
1103
1104 u32 dummy;
1105 char *machine_name;
1106 int i;
1107 int nr_secflavs;
1108
1109 READ_BUF(16);
1110 COPYMEM(&sess->clientid, 8);
1111 READ32(sess->seqid);
1112 READ32(sess->flags);
1113
1114 /* Fore channel attrs */
1115 READ_BUF(28);
1116 READ32(dummy); /* headerpadsz is always 0 */
1117 READ32(sess->fore_channel.maxreq_sz);
1118 READ32(sess->fore_channel.maxresp_sz);
1119 READ32(sess->fore_channel.maxresp_cached);
1120 READ32(sess->fore_channel.maxops);
1121 READ32(sess->fore_channel.maxreqs);
1122 READ32(sess->fore_channel.nr_rdma_attrs);
1123 if (sess->fore_channel.nr_rdma_attrs == 1) {
1124 READ_BUF(4);
1125 READ32(sess->fore_channel.rdma_attrs);
1126 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1127 dprintk("Too many fore channel attr bitmaps!\n");
1128 goto xdr_error;
1129 }
1130
1131 /* Back channel attrs */
1132 READ_BUF(28);
1133 READ32(dummy); /* headerpadsz is always 0 */
1134 READ32(sess->back_channel.maxreq_sz);
1135 READ32(sess->back_channel.maxresp_sz);
1136 READ32(sess->back_channel.maxresp_cached);
1137 READ32(sess->back_channel.maxops);
1138 READ32(sess->back_channel.maxreqs);
1139 READ32(sess->back_channel.nr_rdma_attrs);
1140 if (sess->back_channel.nr_rdma_attrs == 1) {
1141 READ_BUF(4);
1142 READ32(sess->back_channel.rdma_attrs);
1143 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1144 dprintk("Too many back channel attr bitmaps!\n");
1145 goto xdr_error;
1146 }
1147
1148 READ_BUF(8);
1149 READ32(sess->callback_prog);
1150
1151 /* callback_sec_params4 */
1152 READ32(nr_secflavs);
1153 for (i = 0; i < nr_secflavs; ++i) {
1154 READ_BUF(4);
1155 READ32(dummy);
1156 switch (dummy) {
1157 case RPC_AUTH_NULL:
1158 /* Nothing to read */
1159 break;
1160 case RPC_AUTH_UNIX:
1161 READ_BUF(8);
1162 /* stamp */
1163 READ32(dummy);
1164
1165 /* machine name */
1166 READ32(dummy);
1167 READ_BUF(dummy);
1168 SAVEMEM(machine_name, dummy);
1169
1170 /* uid, gid */
1171 READ_BUF(8);
1172 READ32(sess->uid);
1173 READ32(sess->gid);
1174
1175 /* more gids */
1176 READ_BUF(4);
1177 READ32(dummy);
1178 READ_BUF(dummy * 4);
1179 for (i = 0; i < dummy; ++i)
1180 READ32(dummy);
1181 break;
1182 case RPC_AUTH_GSS:
1183 dprintk("RPC_AUTH_GSS callback secflavor "
1184 "not supported!\n");
1185 READ_BUF(8);
1186 /* gcbp_service */
1187 READ32(dummy);
1188 /* gcbp_handle_from_server */
1189 READ32(dummy);
1190 READ_BUF(dummy);
1191 p += XDR_QUADLEN(dummy);
1192 /* gcbp_handle_from_client */
1193 READ_BUF(4);
1194 READ32(dummy);
1195 READ_BUF(dummy);
1196 p += XDR_QUADLEN(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 = p + (argp->pagelen>>2);
1426 argp->pagelen = 0;
1427 } else {
1428 argp->end = 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 * END OF "GENERIC" DECODE ROUTINES.
1451 */
1452
1453 /*
1454 * START OF "GENERIC" ENCODE ROUTINES.
1455 * These may look a little ugly since they are imported from a "generic"
1456 * set of XDR encode/decode routines which are intended to be shared by
1457 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1458 *
1459 * If the pain of reading these is too great, it should be a straightforward
1460 * task to translate them into Linux-specific versions which are more
1461 * consistent with the style used in NFSv2/v3...
1462 */
1463 #define ENCODE_HEAD __be32 *p
1464
1465 #define WRITE32(n) *p++ = htonl(n)
1466 #define WRITE64(n) do { \
1467 *p++ = htonl((u32)((n) >> 32)); \
1468 *p++ = htonl((u32)(n)); \
1469 } while (0)
1470 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1471 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1472 memcpy(p, ptr, nbytes); \
1473 p += XDR_QUADLEN(nbytes); \
1474 }} while (0)
1475 #define WRITECINFO(c) do { \
1476 *p++ = htonl(c.atomic); \
1477 *p++ = htonl(c.before_ctime_sec); \
1478 *p++ = htonl(c.before_ctime_nsec); \
1479 *p++ = htonl(c.after_ctime_sec); \
1480 *p++ = htonl(c.after_ctime_nsec); \
1481 } while (0)
1482
1483 #define RESERVE_SPACE(nbytes) do { \
1484 p = resp->p; \
1485 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1486 } while (0)
1487 #define ADJUST_ARGS() resp->p = p
1488
1489 /*
1490 * Header routine to setup seqid operation replay cache
1491 */
1492 #define ENCODE_SEQID_OP_HEAD \
1493 __be32 *save; \
1494 \
1495 save = resp->p;
1496
1497 /*
1498 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1499 * is where sequence id's are incremented, and the replay cache is filled.
1500 * Note that we increment sequence id's here, at the last moment, so we're sure
1501 * we know whether the error to be returned is a sequence id mutating error.
1502 */
1503
1504 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1505 if (seqid_mutating_err(nfserr) && stateowner) { \
1506 stateowner->so_seqid++; \
1507 stateowner->so_replay.rp_status = nfserr; \
1508 stateowner->so_replay.rp_buflen = \
1509 (((char *)(resp)->p - (char *)save)); \
1510 memcpy(stateowner->so_replay.rp_buf, save, \
1511 stateowner->so_replay.rp_buflen); \
1512 } } while (0);
1513
1514 /* Encode as an array of strings the string given with components
1515 * seperated @sep.
1516 */
1517 static __be32 nfsd4_encode_components(char sep, char *components,
1518 __be32 **pp, int *buflen)
1519 {
1520 __be32 *p = *pp;
1521 __be32 *countp = p;
1522 int strlen, count=0;
1523 char *str, *end;
1524
1525 dprintk("nfsd4_encode_components(%s)\n", components);
1526 if ((*buflen -= 4) < 0)
1527 return nfserr_resource;
1528 WRITE32(0); /* We will fill this in with @count later */
1529 end = str = components;
1530 while (*end) {
1531 for (; *end && (*end != sep); end++)
1532 ; /* Point to end of component */
1533 strlen = end - str;
1534 if (strlen) {
1535 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1536 return nfserr_resource;
1537 WRITE32(strlen);
1538 WRITEMEM(str, strlen);
1539 count++;
1540 }
1541 else
1542 end++;
1543 str = end;
1544 }
1545 *pp = p;
1546 p = countp;
1547 WRITE32(count);
1548 return 0;
1549 }
1550
1551 /*
1552 * encode a location element of a fs_locations structure
1553 */
1554 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1555 __be32 **pp, int *buflen)
1556 {
1557 __be32 status;
1558 __be32 *p = *pp;
1559
1560 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1561 if (status)
1562 return status;
1563 status = nfsd4_encode_components('/', location->path, &p, buflen);
1564 if (status)
1565 return status;
1566 *pp = p;
1567 return 0;
1568 }
1569
1570 /*
1571 * Return the path to an export point in the pseudo filesystem namespace
1572 * Returned string is safe to use as long as the caller holds a reference
1573 * to @exp.
1574 */
1575 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1576 {
1577 struct svc_fh tmp_fh;
1578 char *path, *rootpath;
1579
1580 fh_init(&tmp_fh, NFS4_FHSIZE);
1581 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1582 if (*stat)
1583 return NULL;
1584 rootpath = tmp_fh.fh_export->ex_pathname;
1585
1586 path = exp->ex_pathname;
1587
1588 if (strncmp(path, rootpath, strlen(rootpath))) {
1589 dprintk("nfsd: fs_locations failed;"
1590 "%s is not contained in %s\n", path, rootpath);
1591 *stat = nfserr_notsupp;
1592 return NULL;
1593 }
1594
1595 return path + strlen(rootpath);
1596 }
1597
1598 /*
1599 * encode a fs_locations structure
1600 */
1601 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1602 struct svc_export *exp,
1603 __be32 **pp, int *buflen)
1604 {
1605 __be32 status;
1606 int i;
1607 __be32 *p = *pp;
1608 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1609 char *root = nfsd4_path(rqstp, exp, &status);
1610
1611 if (status)
1612 return status;
1613 status = nfsd4_encode_components('/', root, &p, buflen);
1614 if (status)
1615 return status;
1616 if ((*buflen -= 4) < 0)
1617 return nfserr_resource;
1618 WRITE32(fslocs->locations_count);
1619 for (i=0; i<fslocs->locations_count; i++) {
1620 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1621 &p, buflen);
1622 if (status)
1623 return status;
1624 }
1625 *pp = p;
1626 return 0;
1627 }
1628
1629 static u32 nfs4_ftypes[16] = {
1630 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1631 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1632 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1633 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1634 };
1635
1636 static __be32
1637 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1638 __be32 **p, int *buflen)
1639 {
1640 int status;
1641
1642 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1643 return nfserr_resource;
1644 if (whotype != NFS4_ACL_WHO_NAMED)
1645 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1646 else if (group)
1647 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1648 else
1649 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1650 if (status < 0)
1651 return nfserrno(status);
1652 *p = xdr_encode_opaque(*p, NULL, status);
1653 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1654 BUG_ON(*buflen < 0);
1655 return 0;
1656 }
1657
1658 static inline __be32
1659 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1660 {
1661 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1662 }
1663
1664 static inline __be32
1665 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1666 {
1667 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1668 }
1669
1670 static inline __be32
1671 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1672 __be32 **p, int *buflen)
1673 {
1674 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1675 }
1676
1677 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1678 FATTR4_WORD0_RDATTR_ERROR)
1679 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1680
1681 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1682 {
1683 /* As per referral draft: */
1684 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1685 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1686 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1687 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1688 *rdattr_err = NFSERR_MOVED;
1689 else
1690 return nfserr_moved;
1691 }
1692 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1693 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1694 return 0;
1695 }
1696
1697 /*
1698 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1699 * ourselves.
1700 *
1701 * @countp is the buffer size in _words_; upon successful return this becomes
1702 * replaced with the number of words written.
1703 */
1704 __be32
1705 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1706 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1707 struct svc_rqst *rqstp, int ignore_crossmnt)
1708 {
1709 u32 bmval0 = bmval[0];
1710 u32 bmval1 = bmval[1];
1711 struct kstat stat;
1712 struct svc_fh tempfh;
1713 struct kstatfs statfs;
1714 int buflen = *countp << 2;
1715 __be32 *attrlenp;
1716 u32 dummy;
1717 u64 dummy64;
1718 u32 rdattr_err = 0;
1719 __be32 *p = buffer;
1720 __be32 status;
1721 int err;
1722 int aclsupport = 0;
1723 struct nfs4_acl *acl = NULL;
1724
1725 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1726 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1727 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1728
1729 if (exp->ex_fslocs.migrated) {
1730 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1731 if (status)
1732 goto out;
1733 }
1734
1735 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1736 if (err)
1737 goto out_nfserr;
1738 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1739 FATTR4_WORD0_MAXNAME)) ||
1740 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1741 FATTR4_WORD1_SPACE_TOTAL))) {
1742 err = vfs_statfs(dentry, &statfs);
1743 if (err)
1744 goto out_nfserr;
1745 }
1746 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1747 fh_init(&tempfh, NFS4_FHSIZE);
1748 status = fh_compose(&tempfh, exp, dentry, NULL);
1749 if (status)
1750 goto out;
1751 fhp = &tempfh;
1752 }
1753 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1754 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1755 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1756 aclsupport = (err == 0);
1757 if (bmval0 & FATTR4_WORD0_ACL) {
1758 if (err == -EOPNOTSUPP)
1759 bmval0 &= ~FATTR4_WORD0_ACL;
1760 else if (err == -EINVAL) {
1761 status = nfserr_attrnotsupp;
1762 goto out;
1763 } else if (err != 0)
1764 goto out_nfserr;
1765 }
1766 }
1767 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1768 if (exp->ex_fslocs.locations == NULL) {
1769 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1770 }
1771 }
1772 if ((buflen -= 16) < 0)
1773 goto out_resource;
1774
1775 WRITE32(2);
1776 WRITE32(bmval0);
1777 WRITE32(bmval1);
1778 attrlenp = p++; /* to be backfilled later */
1779
1780 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1781 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1782 if ((buflen -= 12) < 0)
1783 goto out_resource;
1784 if (!aclsupport)
1785 word0 &= ~FATTR4_WORD0_ACL;
1786 if (!exp->ex_fslocs.locations)
1787 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1788 WRITE32(2);
1789 WRITE32(word0);
1790 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1791 }
1792 if (bmval0 & FATTR4_WORD0_TYPE) {
1793 if ((buflen -= 4) < 0)
1794 goto out_resource;
1795 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1796 if (dummy == NF4BAD)
1797 goto out_serverfault;
1798 WRITE32(dummy);
1799 }
1800 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1801 if ((buflen -= 4) < 0)
1802 goto out_resource;
1803 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1804 WRITE32(NFS4_FH_PERSISTENT);
1805 else
1806 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1807 }
1808 if (bmval0 & FATTR4_WORD0_CHANGE) {
1809 /*
1810 * Note: This _must_ be consistent with the scheme for writing
1811 * change_info, so any changes made here must be reflected there
1812 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1813 * macro above.)
1814 */
1815 if ((buflen -= 8) < 0)
1816 goto out_resource;
1817 WRITE32(stat.ctime.tv_sec);
1818 WRITE32(stat.ctime.tv_nsec);
1819 }
1820 if (bmval0 & FATTR4_WORD0_SIZE) {
1821 if ((buflen -= 8) < 0)
1822 goto out_resource;
1823 WRITE64(stat.size);
1824 }
1825 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1826 if ((buflen -= 4) < 0)
1827 goto out_resource;
1828 WRITE32(1);
1829 }
1830 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1831 if ((buflen -= 4) < 0)
1832 goto out_resource;
1833 WRITE32(1);
1834 }
1835 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1836 if ((buflen -= 4) < 0)
1837 goto out_resource;
1838 WRITE32(0);
1839 }
1840 if (bmval0 & FATTR4_WORD0_FSID) {
1841 if ((buflen -= 16) < 0)
1842 goto out_resource;
1843 if (exp->ex_fslocs.migrated) {
1844 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1845 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1846 } else switch(fsid_source(fhp)) {
1847 case FSIDSOURCE_FSID:
1848 WRITE64((u64)exp->ex_fsid);
1849 WRITE64((u64)0);
1850 break;
1851 case FSIDSOURCE_DEV:
1852 WRITE32(0);
1853 WRITE32(MAJOR(stat.dev));
1854 WRITE32(0);
1855 WRITE32(MINOR(stat.dev));
1856 break;
1857 case FSIDSOURCE_UUID:
1858 WRITEMEM(exp->ex_uuid, 16);
1859 break;
1860 }
1861 }
1862 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1863 if ((buflen -= 4) < 0)
1864 goto out_resource;
1865 WRITE32(0);
1866 }
1867 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1868 if ((buflen -= 4) < 0)
1869 goto out_resource;
1870 WRITE32(NFSD_LEASE_TIME);
1871 }
1872 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1873 if ((buflen -= 4) < 0)
1874 goto out_resource;
1875 WRITE32(rdattr_err);
1876 }
1877 if (bmval0 & FATTR4_WORD0_ACL) {
1878 struct nfs4_ace *ace;
1879
1880 if (acl == NULL) {
1881 if ((buflen -= 4) < 0)
1882 goto out_resource;
1883
1884 WRITE32(0);
1885 goto out_acl;
1886 }
1887 if ((buflen -= 4) < 0)
1888 goto out_resource;
1889 WRITE32(acl->naces);
1890
1891 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1892 if ((buflen -= 4*3) < 0)
1893 goto out_resource;
1894 WRITE32(ace->type);
1895 WRITE32(ace->flag);
1896 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1897 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1898 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1899 &p, &buflen);
1900 if (status == nfserr_resource)
1901 goto out_resource;
1902 if (status)
1903 goto out;
1904 }
1905 }
1906 out_acl:
1907 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1908 if ((buflen -= 4) < 0)
1909 goto out_resource;
1910 WRITE32(aclsupport ?
1911 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1912 }
1913 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1914 if ((buflen -= 4) < 0)
1915 goto out_resource;
1916 WRITE32(1);
1917 }
1918 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1919 if ((buflen -= 4) < 0)
1920 goto out_resource;
1921 WRITE32(1);
1922 }
1923 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1924 if ((buflen -= 4) < 0)
1925 goto out_resource;
1926 WRITE32(1);
1927 }
1928 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1929 if ((buflen -= 4) < 0)
1930 goto out_resource;
1931 WRITE32(1);
1932 }
1933 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1934 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1935 if (buflen < 0)
1936 goto out_resource;
1937 WRITE32(fhp->fh_handle.fh_size);
1938 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1939 }
1940 if (bmval0 & FATTR4_WORD0_FILEID) {
1941 if ((buflen -= 8) < 0)
1942 goto out_resource;
1943 WRITE64(stat.ino);
1944 }
1945 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1946 if ((buflen -= 8) < 0)
1947 goto out_resource;
1948 WRITE64((u64) statfs.f_ffree);
1949 }
1950 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1951 if ((buflen -= 8) < 0)
1952 goto out_resource;
1953 WRITE64((u64) statfs.f_ffree);
1954 }
1955 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1956 if ((buflen -= 8) < 0)
1957 goto out_resource;
1958 WRITE64((u64) statfs.f_files);
1959 }
1960 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1961 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1962 if (status == nfserr_resource)
1963 goto out_resource;
1964 if (status)
1965 goto out;
1966 }
1967 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1968 if ((buflen -= 4) < 0)
1969 goto out_resource;
1970 WRITE32(1);
1971 }
1972 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1973 if ((buflen -= 8) < 0)
1974 goto out_resource;
1975 WRITE64(~(u64)0);
1976 }
1977 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1978 if ((buflen -= 4) < 0)
1979 goto out_resource;
1980 WRITE32(255);
1981 }
1982 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1983 if ((buflen -= 4) < 0)
1984 goto out_resource;
1985 WRITE32(statfs.f_namelen);
1986 }
1987 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1988 if ((buflen -= 8) < 0)
1989 goto out_resource;
1990 WRITE64((u64) svc_max_payload(rqstp));
1991 }
1992 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1993 if ((buflen -= 8) < 0)
1994 goto out_resource;
1995 WRITE64((u64) svc_max_payload(rqstp));
1996 }
1997 if (bmval1 & FATTR4_WORD1_MODE) {
1998 if ((buflen -= 4) < 0)
1999 goto out_resource;
2000 WRITE32(stat.mode & S_IALLUGO);
2001 }
2002 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2003 if ((buflen -= 4) < 0)
2004 goto out_resource;
2005 WRITE32(1);
2006 }
2007 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2008 if ((buflen -= 4) < 0)
2009 goto out_resource;
2010 WRITE32(stat.nlink);
2011 }
2012 if (bmval1 & FATTR4_WORD1_OWNER) {
2013 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2014 if (status == nfserr_resource)
2015 goto out_resource;
2016 if (status)
2017 goto out;
2018 }
2019 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2020 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2021 if (status == nfserr_resource)
2022 goto out_resource;
2023 if (status)
2024 goto out;
2025 }
2026 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2027 if ((buflen -= 8) < 0)
2028 goto out_resource;
2029 WRITE32((u32) MAJOR(stat.rdev));
2030 WRITE32((u32) MINOR(stat.rdev));
2031 }
2032 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2033 if ((buflen -= 8) < 0)
2034 goto out_resource;
2035 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2036 WRITE64(dummy64);
2037 }
2038 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2039 if ((buflen -= 8) < 0)
2040 goto out_resource;
2041 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2042 WRITE64(dummy64);
2043 }
2044 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2045 if ((buflen -= 8) < 0)
2046 goto out_resource;
2047 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2048 WRITE64(dummy64);
2049 }
2050 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2051 if ((buflen -= 8) < 0)
2052 goto out_resource;
2053 dummy64 = (u64)stat.blocks << 9;
2054 WRITE64(dummy64);
2055 }
2056 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2057 if ((buflen -= 12) < 0)
2058 goto out_resource;
2059 WRITE32(0);
2060 WRITE32(stat.atime.tv_sec);
2061 WRITE32(stat.atime.tv_nsec);
2062 }
2063 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2064 if ((buflen -= 12) < 0)
2065 goto out_resource;
2066 WRITE32(0);
2067 WRITE32(1);
2068 WRITE32(0);
2069 }
2070 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2071 if ((buflen -= 12) < 0)
2072 goto out_resource;
2073 WRITE32(0);
2074 WRITE32(stat.ctime.tv_sec);
2075 WRITE32(stat.ctime.tv_nsec);
2076 }
2077 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2078 if ((buflen -= 12) < 0)
2079 goto out_resource;
2080 WRITE32(0);
2081 WRITE32(stat.mtime.tv_sec);
2082 WRITE32(stat.mtime.tv_nsec);
2083 }
2084 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2085 if ((buflen -= 8) < 0)
2086 goto out_resource;
2087 /*
2088 * Get parent's attributes if not ignoring crossmount
2089 * and this is the root of a cross-mounted filesystem.
2090 */
2091 if (ignore_crossmnt == 0 &&
2092 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2093 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2094 exp->ex_path.mnt->mnt_mountpoint, &stat);
2095 if (err)
2096 goto out_nfserr;
2097 }
2098 WRITE64(stat.ino);
2099 }
2100 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2101 *countp = p - buffer;
2102 status = nfs_ok;
2103
2104 out:
2105 kfree(acl);
2106 if (fhp == &tempfh)
2107 fh_put(&tempfh);
2108 return status;
2109 out_nfserr:
2110 status = nfserrno(err);
2111 goto out;
2112 out_resource:
2113 *countp = 0;
2114 status = nfserr_resource;
2115 goto out;
2116 out_serverfault:
2117 status = nfserr_serverfault;
2118 goto out;
2119 }
2120
2121 static inline int attributes_need_mount(u32 *bmval)
2122 {
2123 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2124 return 1;
2125 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2126 return 1;
2127 return 0;
2128 }
2129
2130 static __be32
2131 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2132 const char *name, int namlen, __be32 *p, int *buflen)
2133 {
2134 struct svc_export *exp = cd->rd_fhp->fh_export;
2135 struct dentry *dentry;
2136 __be32 nfserr;
2137 int ignore_crossmnt = 0;
2138
2139 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2140 if (IS_ERR(dentry))
2141 return nfserrno(PTR_ERR(dentry));
2142
2143 exp_get(exp);
2144 /*
2145 * In the case of a mountpoint, the client may be asking for
2146 * attributes that are only properties of the underlying filesystem
2147 * as opposed to the cross-mounted file system. In such a case,
2148 * we will not follow the cross mount and will fill the attribtutes
2149 * directly from the mountpoint dentry.
2150 */
2151 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2152 ignore_crossmnt = 1;
2153 else if (d_mountpoint(dentry)) {
2154 int err;
2155
2156 /*
2157 * Why the heck aren't we just using nfsd_lookup??
2158 * Different "."/".." handling? Something else?
2159 * At least, add a comment here to explain....
2160 */
2161 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2162 if (err) {
2163 nfserr = nfserrno(err);
2164 goto out_put;
2165 }
2166 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2167 if (nfserr)
2168 goto out_put;
2169
2170 }
2171 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2172 cd->rd_rqstp, ignore_crossmnt);
2173 out_put:
2174 dput(dentry);
2175 exp_put(exp);
2176 return nfserr;
2177 }
2178
2179 static __be32 *
2180 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2181 {
2182 __be32 *attrlenp;
2183
2184 if (buflen < 6)
2185 return NULL;
2186 *p++ = htonl(2);
2187 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2188 *p++ = htonl(0); /* bmval1 */
2189
2190 attrlenp = p++;
2191 *p++ = nfserr; /* no htonl */
2192 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2193 return p;
2194 }
2195
2196 static int
2197 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2198 loff_t offset, u64 ino, unsigned int d_type)
2199 {
2200 struct readdir_cd *ccd = ccdv;
2201 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2202 int buflen;
2203 __be32 *p = cd->buffer;
2204 __be32 nfserr = nfserr_toosmall;
2205
2206 /* In nfsv4, "." and ".." never make it onto the wire.. */
2207 if (name && isdotent(name, namlen)) {
2208 cd->common.err = nfs_ok;
2209 return 0;
2210 }
2211
2212 if (cd->offset)
2213 xdr_encode_hyper(cd->offset, (u64) offset);
2214
2215 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2216 if (buflen < 0)
2217 goto fail;
2218
2219 *p++ = xdr_one; /* mark entry present */
2220 cd->offset = p; /* remember pointer */
2221 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2222 p = xdr_encode_array(p, name, namlen); /* name length & name */
2223
2224 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2225 switch (nfserr) {
2226 case nfs_ok:
2227 p += buflen;
2228 break;
2229 case nfserr_resource:
2230 nfserr = nfserr_toosmall;
2231 goto fail;
2232 case nfserr_dropit:
2233 goto fail;
2234 default:
2235 /*
2236 * If the client requested the RDATTR_ERROR attribute,
2237 * we stuff the error code into this attribute
2238 * and continue. If this attribute was not requested,
2239 * then in accordance with the spec, we fail the
2240 * entire READDIR operation(!)
2241 */
2242 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2243 goto fail;
2244 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2245 if (p == NULL) {
2246 nfserr = nfserr_toosmall;
2247 goto fail;
2248 }
2249 }
2250 cd->buflen -= (p - cd->buffer);
2251 cd->buffer = p;
2252 cd->common.err = nfs_ok;
2253 return 0;
2254 fail:
2255 cd->common.err = nfserr;
2256 return -EINVAL;
2257 }
2258
2259 static void
2260 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2261 {
2262 ENCODE_HEAD;
2263
2264 RESERVE_SPACE(sizeof(stateid_t));
2265 WRITE32(sid->si_generation);
2266 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2267 ADJUST_ARGS();
2268 }
2269
2270 static __be32
2271 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2272 {
2273 ENCODE_HEAD;
2274
2275 if (!nfserr) {
2276 RESERVE_SPACE(8);
2277 WRITE32(access->ac_supported);
2278 WRITE32(access->ac_resp_access);
2279 ADJUST_ARGS();
2280 }
2281 return nfserr;
2282 }
2283
2284 static __be32
2285 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2286 {
2287 ENCODE_SEQID_OP_HEAD;
2288
2289 if (!nfserr)
2290 nfsd4_encode_stateid(resp, &close->cl_stateid);
2291
2292 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2293 return nfserr;
2294 }
2295
2296
2297 static __be32
2298 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2299 {
2300 ENCODE_HEAD;
2301
2302 if (!nfserr) {
2303 RESERVE_SPACE(8);
2304 WRITEMEM(commit->co_verf.data, 8);
2305 ADJUST_ARGS();
2306 }
2307 return nfserr;
2308 }
2309
2310 static __be32
2311 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2312 {
2313 ENCODE_HEAD;
2314
2315 if (!nfserr) {
2316 RESERVE_SPACE(32);
2317 WRITECINFO(create->cr_cinfo);
2318 WRITE32(2);
2319 WRITE32(create->cr_bmval[0]);
2320 WRITE32(create->cr_bmval[1]);
2321 ADJUST_ARGS();
2322 }
2323 return nfserr;
2324 }
2325
2326 static __be32
2327 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2328 {
2329 struct svc_fh *fhp = getattr->ga_fhp;
2330 int buflen;
2331
2332 if (nfserr)
2333 return nfserr;
2334
2335 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2336 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2337 resp->p, &buflen, getattr->ga_bmval,
2338 resp->rqstp, 0);
2339 if (!nfserr)
2340 resp->p += buflen;
2341 return nfserr;
2342 }
2343
2344 static __be32
2345 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2346 {
2347 struct svc_fh *fhp = *fhpp;
2348 unsigned int len;
2349 ENCODE_HEAD;
2350
2351 if (!nfserr) {
2352 len = fhp->fh_handle.fh_size;
2353 RESERVE_SPACE(len + 4);
2354 WRITE32(len);
2355 WRITEMEM(&fhp->fh_handle.fh_base, len);
2356 ADJUST_ARGS();
2357 }
2358 return nfserr;
2359 }
2360
2361 /*
2362 * Including all fields other than the name, a LOCK4denied structure requires
2363 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2364 */
2365 static void
2366 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2367 {
2368 ENCODE_HEAD;
2369
2370 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2371 WRITE64(ld->ld_start);
2372 WRITE64(ld->ld_length);
2373 WRITE32(ld->ld_type);
2374 if (ld->ld_sop) {
2375 WRITEMEM(&ld->ld_clientid, 8);
2376 WRITE32(ld->ld_sop->so_owner.len);
2377 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2378 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2379 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2380 WRITE64((u64)0); /* clientid */
2381 WRITE32(0); /* length of owner name */
2382 }
2383 ADJUST_ARGS();
2384 }
2385
2386 static __be32
2387 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2388 {
2389 ENCODE_SEQID_OP_HEAD;
2390
2391 if (!nfserr)
2392 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2393 else if (nfserr == nfserr_denied)
2394 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2395
2396 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2397 return nfserr;
2398 }
2399
2400 static __be32
2401 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2402 {
2403 if (nfserr == nfserr_denied)
2404 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2405 return nfserr;
2406 }
2407
2408 static __be32
2409 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2410 {
2411 ENCODE_SEQID_OP_HEAD;
2412
2413 if (!nfserr)
2414 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2415
2416 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2417 return nfserr;
2418 }
2419
2420
2421 static __be32
2422 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2423 {
2424 ENCODE_HEAD;
2425
2426 if (!nfserr) {
2427 RESERVE_SPACE(20);
2428 WRITECINFO(link->li_cinfo);
2429 ADJUST_ARGS();
2430 }
2431 return nfserr;
2432 }
2433
2434
2435 static __be32
2436 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2437 {
2438 ENCODE_HEAD;
2439 ENCODE_SEQID_OP_HEAD;
2440
2441 if (nfserr)
2442 goto out;
2443
2444 nfsd4_encode_stateid(resp, &open->op_stateid);
2445 RESERVE_SPACE(40);
2446 WRITECINFO(open->op_cinfo);
2447 WRITE32(open->op_rflags);
2448 WRITE32(2);
2449 WRITE32(open->op_bmval[0]);
2450 WRITE32(open->op_bmval[1]);
2451 WRITE32(open->op_delegate_type);
2452 ADJUST_ARGS();
2453
2454 switch (open->op_delegate_type) {
2455 case NFS4_OPEN_DELEGATE_NONE:
2456 break;
2457 case NFS4_OPEN_DELEGATE_READ:
2458 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2459 RESERVE_SPACE(20);
2460 WRITE32(open->op_recall);
2461
2462 /*
2463 * TODO: ACE's in delegations
2464 */
2465 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2466 WRITE32(0);
2467 WRITE32(0);
2468 WRITE32(0); /* XXX: is NULL principal ok? */
2469 ADJUST_ARGS();
2470 break;
2471 case NFS4_OPEN_DELEGATE_WRITE:
2472 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2473 RESERVE_SPACE(32);
2474 WRITE32(0);
2475
2476 /*
2477 * TODO: space_limit's in delegations
2478 */
2479 WRITE32(NFS4_LIMIT_SIZE);
2480 WRITE32(~(u32)0);
2481 WRITE32(~(u32)0);
2482
2483 /*
2484 * TODO: ACE's in delegations
2485 */
2486 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2487 WRITE32(0);
2488 WRITE32(0);
2489 WRITE32(0); /* XXX: is NULL principal ok? */
2490 ADJUST_ARGS();
2491 break;
2492 default:
2493 BUG();
2494 }
2495 /* XXX save filehandle here */
2496 out:
2497 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2498 return nfserr;
2499 }
2500
2501 static __be32
2502 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2503 {
2504 ENCODE_SEQID_OP_HEAD;
2505
2506 if (!nfserr)
2507 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2508
2509 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2510 return nfserr;
2511 }
2512
2513 static __be32
2514 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2515 {
2516 ENCODE_SEQID_OP_HEAD;
2517
2518 if (!nfserr)
2519 nfsd4_encode_stateid(resp, &od->od_stateid);
2520
2521 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2522 return nfserr;
2523 }
2524
2525 static __be32
2526 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2527 struct nfsd4_read *read)
2528 {
2529 u32 eof;
2530 int v, pn;
2531 unsigned long maxcount;
2532 long len;
2533 ENCODE_HEAD;
2534
2535 if (nfserr)
2536 return nfserr;
2537 if (resp->xbuf->page_len)
2538 return nfserr_resource;
2539
2540 RESERVE_SPACE(8); /* eof flag and byte count */
2541
2542 maxcount = svc_max_payload(resp->rqstp);
2543 if (maxcount > read->rd_length)
2544 maxcount = read->rd_length;
2545
2546 len = maxcount;
2547 v = 0;
2548 while (len > 0) {
2549 pn = resp->rqstp->rq_resused++;
2550 resp->rqstp->rq_vec[v].iov_base =
2551 page_address(resp->rqstp->rq_respages[pn]);
2552 resp->rqstp->rq_vec[v].iov_len =
2553 len < PAGE_SIZE ? len : PAGE_SIZE;
2554 v++;
2555 len -= PAGE_SIZE;
2556 }
2557 read->rd_vlen = v;
2558
2559 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2560 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2561 &maxcount);
2562
2563 if (nfserr == nfserr_symlink)
2564 nfserr = nfserr_inval;
2565 if (nfserr)
2566 return nfserr;
2567 eof = (read->rd_offset + maxcount >=
2568 read->rd_fhp->fh_dentry->d_inode->i_size);
2569
2570 WRITE32(eof);
2571 WRITE32(maxcount);
2572 ADJUST_ARGS();
2573 resp->xbuf->head[0].iov_len = (char*)p
2574 - (char*)resp->xbuf->head[0].iov_base;
2575 resp->xbuf->page_len = maxcount;
2576
2577 /* Use rest of head for padding and remaining ops: */
2578 resp->xbuf->tail[0].iov_base = p;
2579 resp->xbuf->tail[0].iov_len = 0;
2580 if (maxcount&3) {
2581 RESERVE_SPACE(4);
2582 WRITE32(0);
2583 resp->xbuf->tail[0].iov_base += maxcount&3;
2584 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2585 ADJUST_ARGS();
2586 }
2587 return 0;
2588 }
2589
2590 static __be32
2591 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2592 {
2593 int maxcount;
2594 char *page;
2595 ENCODE_HEAD;
2596
2597 if (nfserr)
2598 return nfserr;
2599 if (resp->xbuf->page_len)
2600 return nfserr_resource;
2601
2602 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2603
2604 maxcount = PAGE_SIZE;
2605 RESERVE_SPACE(4);
2606
2607 /*
2608 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2609 * if they would overflow the buffer. Is this kosher in NFSv4? If
2610 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2611 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2612 */
2613 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2614 if (nfserr == nfserr_isdir)
2615 return nfserr_inval;
2616 if (nfserr)
2617 return nfserr;
2618
2619 WRITE32(maxcount);
2620 ADJUST_ARGS();
2621 resp->xbuf->head[0].iov_len = (char*)p
2622 - (char*)resp->xbuf->head[0].iov_base;
2623 resp->xbuf->page_len = maxcount;
2624
2625 /* Use rest of head for padding and remaining ops: */
2626 resp->xbuf->tail[0].iov_base = p;
2627 resp->xbuf->tail[0].iov_len = 0;
2628 if (maxcount&3) {
2629 RESERVE_SPACE(4);
2630 WRITE32(0);
2631 resp->xbuf->tail[0].iov_base += maxcount&3;
2632 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2633 ADJUST_ARGS();
2634 }
2635 return 0;
2636 }
2637
2638 static __be32
2639 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2640 {
2641 int maxcount;
2642 loff_t offset;
2643 __be32 *page, *savep, *tailbase;
2644 ENCODE_HEAD;
2645
2646 if (nfserr)
2647 return nfserr;
2648 if (resp->xbuf->page_len)
2649 return nfserr_resource;
2650
2651 RESERVE_SPACE(8); /* verifier */
2652 savep = p;
2653
2654 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2655 WRITE32(0);
2656 WRITE32(0);
2657 ADJUST_ARGS();
2658 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2659 tailbase = p;
2660
2661 maxcount = PAGE_SIZE;
2662 if (maxcount > readdir->rd_maxcount)
2663 maxcount = readdir->rd_maxcount;
2664
2665 /*
2666 * Convert from bytes to words, account for the two words already
2667 * written, make sure to leave two words at the end for the next
2668 * pointer and eof field.
2669 */
2670 maxcount = (maxcount >> 2) - 4;
2671 if (maxcount < 0) {
2672 nfserr = nfserr_toosmall;
2673 goto err_no_verf;
2674 }
2675
2676 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2677 readdir->common.err = 0;
2678 readdir->buflen = maxcount;
2679 readdir->buffer = page;
2680 readdir->offset = NULL;
2681
2682 offset = readdir->rd_cookie;
2683 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2684 &offset,
2685 &readdir->common, nfsd4_encode_dirent);
2686 if (nfserr == nfs_ok &&
2687 readdir->common.err == nfserr_toosmall &&
2688 readdir->buffer == page)
2689 nfserr = nfserr_toosmall;
2690 if (nfserr == nfserr_symlink)
2691 nfserr = nfserr_notdir;
2692 if (nfserr)
2693 goto err_no_verf;
2694
2695 if (readdir->offset)
2696 xdr_encode_hyper(readdir->offset, offset);
2697
2698 p = readdir->buffer;
2699 *p++ = 0; /* no more entries */
2700 *p++ = htonl(readdir->common.err == nfserr_eof);
2701 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2702 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2703
2704 /* Use rest of head for padding and remaining ops: */
2705 resp->xbuf->tail[0].iov_base = tailbase;
2706 resp->xbuf->tail[0].iov_len = 0;
2707 resp->p = resp->xbuf->tail[0].iov_base;
2708 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2709
2710 return 0;
2711 err_no_verf:
2712 p = savep;
2713 ADJUST_ARGS();
2714 return nfserr;
2715 }
2716
2717 static __be32
2718 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2719 {
2720 ENCODE_HEAD;
2721
2722 if (!nfserr) {
2723 RESERVE_SPACE(20);
2724 WRITECINFO(remove->rm_cinfo);
2725 ADJUST_ARGS();
2726 }
2727 return nfserr;
2728 }
2729
2730 static __be32
2731 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2732 {
2733 ENCODE_HEAD;
2734
2735 if (!nfserr) {
2736 RESERVE_SPACE(40);
2737 WRITECINFO(rename->rn_sinfo);
2738 WRITECINFO(rename->rn_tinfo);
2739 ADJUST_ARGS();
2740 }
2741 return nfserr;
2742 }
2743
2744 static __be32
2745 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2746 struct nfsd4_secinfo *secinfo)
2747 {
2748 int i = 0;
2749 struct svc_export *exp = secinfo->si_exp;
2750 u32 nflavs;
2751 struct exp_flavor_info *flavs;
2752 struct exp_flavor_info def_flavs[2];
2753 ENCODE_HEAD;
2754
2755 if (nfserr)
2756 goto out;
2757 if (exp->ex_nflavors) {
2758 flavs = exp->ex_flavors;
2759 nflavs = exp->ex_nflavors;
2760 } else { /* Handling of some defaults in absence of real secinfo: */
2761 flavs = def_flavs;
2762 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2763 nflavs = 2;
2764 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2765 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2766 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2767 nflavs = 1;
2768 flavs[0].pseudoflavor
2769 = svcauth_gss_flavor(exp->ex_client);
2770 } else {
2771 nflavs = 1;
2772 flavs[0].pseudoflavor
2773 = exp->ex_client->flavour->flavour;
2774 }
2775 }
2776
2777 RESERVE_SPACE(4);
2778 WRITE32(nflavs);
2779 ADJUST_ARGS();
2780 for (i = 0; i < nflavs; i++) {
2781 u32 flav = flavs[i].pseudoflavor;
2782 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2783
2784 if (gm) {
2785 RESERVE_SPACE(4);
2786 WRITE32(RPC_AUTH_GSS);
2787 ADJUST_ARGS();
2788 RESERVE_SPACE(4 + gm->gm_oid.len);
2789 WRITE32(gm->gm_oid.len);
2790 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2791 ADJUST_ARGS();
2792 RESERVE_SPACE(4);
2793 WRITE32(0); /* qop */
2794 ADJUST_ARGS();
2795 RESERVE_SPACE(4);
2796 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2797 ADJUST_ARGS();
2798 gss_mech_put(gm);
2799 } else {
2800 RESERVE_SPACE(4);
2801 WRITE32(flav);
2802 ADJUST_ARGS();
2803 }
2804 }
2805 out:
2806 if (exp)
2807 exp_put(exp);
2808 return nfserr;
2809 }
2810
2811 /*
2812 * The SETATTR encode routine is special -- it always encodes a bitmap,
2813 * regardless of the error status.
2814 */
2815 static __be32
2816 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2817 {
2818 ENCODE_HEAD;
2819
2820 RESERVE_SPACE(12);
2821 if (nfserr) {
2822 WRITE32(2);
2823 WRITE32(0);
2824 WRITE32(0);
2825 }
2826 else {
2827 WRITE32(2);
2828 WRITE32(setattr->sa_bmval[0]);
2829 WRITE32(setattr->sa_bmval[1]);
2830 }
2831 ADJUST_ARGS();
2832 return nfserr;
2833 }
2834
2835 static __be32
2836 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2837 {
2838 ENCODE_HEAD;
2839
2840 if (!nfserr) {
2841 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2842 WRITEMEM(&scd->se_clientid, 8);
2843 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2844 ADJUST_ARGS();
2845 }
2846 else if (nfserr == nfserr_clid_inuse) {
2847 RESERVE_SPACE(8);
2848 WRITE32(0);
2849 WRITE32(0);
2850 ADJUST_ARGS();
2851 }
2852 return nfserr;
2853 }
2854
2855 static __be32
2856 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2857 {
2858 ENCODE_HEAD;
2859
2860 if (!nfserr) {
2861 RESERVE_SPACE(16);
2862 WRITE32(write->wr_bytes_written);
2863 WRITE32(write->wr_how_written);
2864 WRITEMEM(write->wr_verifier.data, 8);
2865 ADJUST_ARGS();
2866 }
2867 return nfserr;
2868 }
2869
2870 static __be32
2871 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2872 struct nfsd4_exchange_id *exid)
2873 {
2874 ENCODE_HEAD;
2875 char *major_id;
2876 char *server_scope;
2877 int major_id_sz;
2878 int server_scope_sz;
2879 uint64_t minor_id = 0;
2880
2881 if (nfserr)
2882 return nfserr;
2883
2884 major_id = utsname()->nodename;
2885 major_id_sz = strlen(major_id);
2886 server_scope = utsname()->nodename;
2887 server_scope_sz = strlen(server_scope);
2888
2889 RESERVE_SPACE(
2890 8 /* eir_clientid */ +
2891 4 /* eir_sequenceid */ +
2892 4 /* eir_flags */ +
2893 4 /* spr_how (SP4_NONE) */ +
2894 8 /* so_minor_id */ +
2895 4 /* so_major_id.len */ +
2896 (XDR_QUADLEN(major_id_sz) * 4) +
2897 4 /* eir_server_scope.len */ +
2898 (XDR_QUADLEN(server_scope_sz) * 4) +
2899 4 /* eir_server_impl_id.count (0) */);
2900
2901 WRITEMEM(&exid->clientid, 8);
2902 WRITE32(exid->seqid);
2903 WRITE32(exid->flags);
2904
2905 /* state_protect4_r. Currently only support SP4_NONE */
2906 BUG_ON(exid->spa_how != SP4_NONE);
2907 WRITE32(exid->spa_how);
2908
2909 /* The server_owner struct */
2910 WRITE64(minor_id); /* Minor id */
2911 /* major id */
2912 WRITE32(major_id_sz);
2913 WRITEMEM(major_id, major_id_sz);
2914
2915 /* Server scope */
2916 WRITE32(server_scope_sz);
2917 WRITEMEM(server_scope, server_scope_sz);
2918
2919 /* Implementation id */
2920 WRITE32(0); /* zero length nfs_impl_id4 array */
2921 ADJUST_ARGS();
2922 return 0;
2923 }
2924
2925 static __be32
2926 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2927 struct nfsd4_create_session *sess)
2928 {
2929 ENCODE_HEAD;
2930
2931 if (nfserr)
2932 return nfserr;
2933
2934 RESERVE_SPACE(24);
2935 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2936 WRITE32(sess->seqid);
2937 WRITE32(sess->flags);
2938 ADJUST_ARGS();
2939
2940 RESERVE_SPACE(28);
2941 WRITE32(0); /* headerpadsz */
2942 WRITE32(sess->fore_channel.maxreq_sz);
2943 WRITE32(sess->fore_channel.maxresp_sz);
2944 WRITE32(sess->fore_channel.maxresp_cached);
2945 WRITE32(sess->fore_channel.maxops);
2946 WRITE32(sess->fore_channel.maxreqs);
2947 WRITE32(sess->fore_channel.nr_rdma_attrs);
2948 ADJUST_ARGS();
2949
2950 if (sess->fore_channel.nr_rdma_attrs) {
2951 RESERVE_SPACE(4);
2952 WRITE32(sess->fore_channel.rdma_attrs);
2953 ADJUST_ARGS();
2954 }
2955
2956 RESERVE_SPACE(28);
2957 WRITE32(0); /* headerpadsz */
2958 WRITE32(sess->back_channel.maxreq_sz);
2959 WRITE32(sess->back_channel.maxresp_sz);
2960 WRITE32(sess->back_channel.maxresp_cached);
2961 WRITE32(sess->back_channel.maxops);
2962 WRITE32(sess->back_channel.maxreqs);
2963 WRITE32(sess->back_channel.nr_rdma_attrs);
2964 ADJUST_ARGS();
2965
2966 if (sess->back_channel.nr_rdma_attrs) {
2967 RESERVE_SPACE(4);
2968 WRITE32(sess->back_channel.rdma_attrs);
2969 ADJUST_ARGS();
2970 }
2971 return 0;
2972 }
2973
2974 static __be32
2975 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2976 struct nfsd4_destroy_session *destroy_session)
2977 {
2978 return nfserr;
2979 }
2980
2981 __be32
2982 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2983 struct nfsd4_sequence *seq)
2984 {
2985 ENCODE_HEAD;
2986
2987 if (nfserr)
2988 return nfserr;
2989
2990 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
2991 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2992 WRITE32(seq->seqid);
2993 WRITE32(seq->slotid);
2994 WRITE32(seq->maxslots);
2995 /*
2996 * FIXME: for now:
2997 * target_maxslots = maxslots
2998 * status_flags = 0
2999 */
3000 WRITE32(seq->maxslots);
3001 WRITE32(0);
3002
3003 ADJUST_ARGS();
3004 return 0;
3005 }
3006
3007 static __be32
3008 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3009 {
3010 return nfserr;
3011 }
3012
3013 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3014
3015 /*
3016 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3017 * since we don't need to filter out obsolete ops as this is
3018 * done in the decoding phase.
3019 */
3020 static nfsd4_enc nfsd4_enc_ops[] = {
3021 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3022 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3023 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3024 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3025 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3026 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3027 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3028 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3029 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3030 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3031 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3032 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3033 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3034 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3035 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3036 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3037 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3038 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3039 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3040 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3041 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3042 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3043 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3044 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3045 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3046 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3047 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3048 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3049 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3050 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3051 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3052 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3053 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3054 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3055 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3056 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3057 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3058
3059 /* NFSv4.1 operations */
3060 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3061 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3062 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3063 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3064 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3065 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3066 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3067 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3068 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3069 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3070 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3071 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3072 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3073 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3074 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3075 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3076 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3077 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3078 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3079 };
3080
3081 void
3082 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3083 {
3084 __be32 *statp;
3085 ENCODE_HEAD;
3086
3087 RESERVE_SPACE(8);
3088 WRITE32(op->opnum);
3089 statp = p++; /* to be backfilled at the end */
3090 ADJUST_ARGS();
3091
3092 if (op->opnum == OP_ILLEGAL)
3093 goto status;
3094 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3095 !nfsd4_enc_ops[op->opnum]);
3096 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3097 status:
3098 /*
3099 * Note: We write the status directly, instead of using WRITE32(),
3100 * since it is already in network byte order.
3101 */
3102 *statp = op->status;
3103 }
3104
3105 /*
3106 * Encode the reply stored in the stateowner reply cache
3107 *
3108 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3109 * previously sent already encoded operation.
3110 *
3111 * called with nfs4_lock_state() held
3112 */
3113 void
3114 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3115 {
3116 ENCODE_HEAD;
3117 struct nfs4_replay *rp = op->replay;
3118
3119 BUG_ON(!rp);
3120
3121 RESERVE_SPACE(8);
3122 WRITE32(op->opnum);
3123 *p++ = rp->rp_status; /* already xdr'ed */
3124 ADJUST_ARGS();
3125
3126 RESERVE_SPACE(rp->rp_buflen);
3127 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3128 ADJUST_ARGS();
3129 }
3130
3131 /*
3132 * END OF "GENERIC" ENCODE ROUTINES.
3133 */
3134
3135 int
3136 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3137 {
3138 return xdr_ressize_check(rqstp, p);
3139 }
3140
3141 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3142 {
3143 if (args->ops != args->iops) {
3144 kfree(args->ops);
3145 args->ops = args->iops;
3146 }
3147 kfree(args->tmpp);
3148 args->tmpp = NULL;
3149 while (args->to_free) {
3150 struct tmpbuf *tb = args->to_free;
3151 args->to_free = tb->next;
3152 tb->release(tb->buf);
3153 kfree(tb);
3154 }
3155 }
3156
3157 int
3158 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3159 {
3160 __be32 status;
3161
3162 args->p = p;
3163 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3164 args->pagelist = rqstp->rq_arg.pages;
3165 args->pagelen = rqstp->rq_arg.page_len;
3166 args->tmpp = NULL;
3167 args->to_free = NULL;
3168 args->ops = args->iops;
3169 args->rqstp = rqstp;
3170
3171 status = nfsd4_decode_compound(args);
3172 if (status) {
3173 nfsd4_release_compoundargs(args);
3174 }
3175 return !status;
3176 }
3177
3178 int
3179 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3180 {
3181 /*
3182 * All that remains is to write the tag and operation count...
3183 */
3184 struct kvec *iov;
3185 p = resp->tagp;
3186 *p++ = htonl(resp->taglen);
3187 memcpy(p, resp->tag, resp->taglen);
3188 p += XDR_QUADLEN(resp->taglen);
3189 *p++ = htonl(resp->opcnt);
3190
3191 if (rqstp->rq_res.page_len)
3192 iov = &rqstp->rq_res.tail[0];
3193 else
3194 iov = &rqstp->rq_res.head[0];
3195 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3196 BUG_ON(iov->iov_len > PAGE_SIZE);
3197 if (resp->cstate.slot != NULL) {
3198 if (resp->cstate.status == nfserr_replay_cache &&
3199 !nfsd4_not_cached(resp)) {
3200 iov->iov_len = resp->cstate.iovlen;
3201 } else {
3202 nfsd4_store_cache_entry(resp);
3203 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3204 resp->cstate.slot->sl_inuse = 0;
3205 }
3206 if (resp->cstate.session)
3207 nfsd4_put_session(resp->cstate.session);
3208 }
3209 return 1;
3210 }
3211
3212 /*
3213 * Local variables:
3214 * c-basic-offset: 8
3215 * End:
3216 */
kernel source for telekom puls (alcatel/mediatek)