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mm-only debug patch...
[mmotm.git] / fs / nfsd / nfs4xdr.c
blob0fbd50cee1f60e8c437102fb4b2cb2cee53afbe1
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 #define DECODE_HEAD \
87 __be32 *p; \
88 __be32 status
89 #define DECODE_TAIL \
90 status = 0; \
91 out: \
92 return status; \
93 xdr_error: \
94 dprintk("NFSD: xdr error (%s:%d)\n", \
95 __FILE__, __LINE__); \
96 status = nfserr_bad_xdr; \
97 goto out
98
99 #define READ32(x) (x) = ntohl(*p++)
100 #define READ64(x) do { \
101 (x) = (u64)ntohl(*p++) << 32; \
102 (x) |= ntohl(*p++); \
103 } while (0)
104 #define READTIME(x) do { \
105 p++; \
106 (x) = ntohl(*p++); \
107 p++; \
108 } while (0)
109 #define READMEM(x,nbytes) do { \
110 x = (char *)p; \
111 p += XDR_QUADLEN(nbytes); \
112 } while (0)
113 #define SAVEMEM(x,nbytes) do { \
114 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
115 savemem(argp, p, nbytes) : \
116 (char *)p)) { \
117 dprintk("NFSD: xdr error (%s:%d)\n", \
118 __FILE__, __LINE__); \
119 goto xdr_error; \
120 } \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123 #define COPYMEM(x,nbytes) do { \
124 memcpy((x), p, nbytes); \
125 p += XDR_QUADLEN(nbytes); \
126 } while (0)
127
128 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
129 #define READ_BUF(nbytes) do { \
130 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
131 p = argp->p; \
132 argp->p += XDR_QUADLEN(nbytes); \
133 } else if (!(p = read_buf(argp, nbytes))) { \
134 dprintk("NFSD: xdr error (%s:%d)\n", \
135 __FILE__, __LINE__); \
136 goto xdr_error; \
137 } \
138 } while (0)
139
140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
141 {
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
144 */
145 unsigned int avail = (char *)argp->end - (char *)argp->p;
146 __be32 *p;
147 if (avail + argp->pagelen < nbytes)
148 return NULL;
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
150 return NULL;
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
153 p = argp->tmp;
154 else {
155 kfree(argp->tmpp);
156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
157 if (!p)
158 return NULL;
159
160 }
161 /*
162 * The following memcpy is safe because read_buf is always
163 * called with nbytes > avail, and the two cases above both
164 * guarantee p points to at least nbytes bytes.
165 */
166 memcpy(p, argp->p, avail);
167 /* step to next page */
168 argp->p = page_address(argp->pagelist[0]);
169 argp->pagelist++;
170 if (argp->pagelen < PAGE_SIZE) {
171 argp->end = p + (argp->pagelen>>2);
172 argp->pagelen = 0;
173 } else {
174 argp->end = p + (PAGE_SIZE>>2);
175 argp->pagelen -= PAGE_SIZE;
176 }
177 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
178 argp->p += XDR_QUADLEN(nbytes - avail);
179 return p;
180 }
181
182 static int zero_clientid(clientid_t *clid)
183 {
184 return (clid->cl_boot == 0) && (clid->cl_id == 0);
185 }
186
187 static int
188 defer_free(struct nfsd4_compoundargs *argp,
189 void (*release)(const void *), void *p)
190 {
191 struct tmpbuf *tb;
192
193 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
194 if (!tb)
195 return -ENOMEM;
196 tb->buf = p;
197 tb->release = release;
198 tb->next = argp->to_free;
199 argp->to_free = tb;
200 return 0;
201 }
202
203 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
204 {
205 if (p == argp->tmp) {
206 p = kmalloc(nbytes, GFP_KERNEL);
207 if (!p)
208 return NULL;
209 memcpy(p, argp->tmp, nbytes);
210 } else {
211 BUG_ON(p != argp->tmpp);
212 argp->tmpp = NULL;
213 }
214 if (defer_free(argp, kfree, p)) {
215 kfree(p);
216 return NULL;
217 } else
218 return (char *)p;
219 }
220
221 static __be32
222 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
223 {
224 u32 bmlen;
225 DECODE_HEAD;
226
227 bmval[0] = 0;
228 bmval[1] = 0;
229 bmval[2] = 0;
230
231 READ_BUF(4);
232 READ32(bmlen);
233 if (bmlen > 1000)
234 goto xdr_error;
235
236 READ_BUF(bmlen << 2);
237 if (bmlen > 0)
238 READ32(bmval[0]);
239 if (bmlen > 1)
240 READ32(bmval[1]);
241 if (bmlen > 2)
242 READ32(bmval[2]);
243
244 DECODE_TAIL;
245 }
246
247 static __be32
248 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
249 struct iattr *iattr, struct nfs4_acl **acl)
250 {
251 int expected_len, len = 0;
252 u32 dummy32;
253 char *buf;
254 int host_err;
255
256 DECODE_HEAD;
257 iattr->ia_valid = 0;
258 if ((status = nfsd4_decode_bitmap(argp, bmval)))
259 return status;
260
261 READ_BUF(4);
262 READ32(expected_len);
263
264 if (bmval[0] & FATTR4_WORD0_SIZE) {
265 READ_BUF(8);
266 len += 8;
267 READ64(iattr->ia_size);
268 iattr->ia_valid |= ATTR_SIZE;
269 }
270 if (bmval[0] & FATTR4_WORD0_ACL) {
271 int nace;
272 struct nfs4_ace *ace;
273
274 READ_BUF(4); len += 4;
275 READ32(nace);
276
277 if (nace > NFS4_ACL_MAX)
278 return nfserr_resource;
279
280 *acl = nfs4_acl_new(nace);
281 if (*acl == NULL) {
282 host_err = -ENOMEM;
283 goto out_nfserr;
284 }
285 defer_free(argp, kfree, *acl);
286
287 (*acl)->naces = nace;
288 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
289 READ_BUF(16); len += 16;
290 READ32(ace->type);
291 READ32(ace->flag);
292 READ32(ace->access_mask);
293 READ32(dummy32);
294 READ_BUF(dummy32);
295 len += XDR_QUADLEN(dummy32) << 2;
296 READMEM(buf, dummy32);
297 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
298 host_err = 0;
299 if (ace->whotype != NFS4_ACL_WHO_NAMED)
300 ace->who = 0;
301 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
302 host_err = nfsd_map_name_to_gid(argp->rqstp,
303 buf, dummy32, &ace->who);
304 else
305 host_err = nfsd_map_name_to_uid(argp->rqstp,
306 buf, dummy32, &ace->who);
307 if (host_err)
308 goto out_nfserr;
309 }
310 } else
311 *acl = NULL;
312 if (bmval[1] & FATTR4_WORD1_MODE) {
313 READ_BUF(4);
314 len += 4;
315 READ32(iattr->ia_mode);
316 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
317 iattr->ia_valid |= ATTR_MODE;
318 }
319 if (bmval[1] & FATTR4_WORD1_OWNER) {
320 READ_BUF(4);
321 len += 4;
322 READ32(dummy32);
323 READ_BUF(dummy32);
324 len += (XDR_QUADLEN(dummy32) << 2);
325 READMEM(buf, dummy32);
326 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
327 goto out_nfserr;
328 iattr->ia_valid |= ATTR_UID;
329 }
330 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
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_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
338 goto out_nfserr;
339 iattr->ia_valid |= ATTR_GID;
340 }
341 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
342 READ_BUF(4);
343 len += 4;
344 READ32(dummy32);
345 switch (dummy32) {
346 case NFS4_SET_TO_CLIENT_TIME:
347 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
348 all 32 bits of 'nseconds'. */
349 READ_BUF(12);
350 len += 12;
351 READ32(dummy32);
352 if (dummy32)
353 return nfserr_inval;
354 READ32(iattr->ia_atime.tv_sec);
355 READ32(iattr->ia_atime.tv_nsec);
356 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
357 return nfserr_inval;
358 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
359 break;
360 case NFS4_SET_TO_SERVER_TIME:
361 iattr->ia_valid |= ATTR_ATIME;
362 break;
363 default:
364 goto xdr_error;
365 }
366 }
367 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
368 READ_BUF(4);
369 len += 4;
370 READ32(dummy32);
371 switch (dummy32) {
372 case NFS4_SET_TO_CLIENT_TIME:
373 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
374 all 32 bits of 'nseconds'. */
375 READ_BUF(12);
376 len += 12;
377 READ32(dummy32);
378 if (dummy32)
379 return nfserr_inval;
380 READ32(iattr->ia_mtime.tv_sec);
381 READ32(iattr->ia_mtime.tv_nsec);
382 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
383 return nfserr_inval;
384 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
385 break;
386 case NFS4_SET_TO_SERVER_TIME:
387 iattr->ia_valid |= ATTR_MTIME;
388 break;
389 default:
390 goto xdr_error;
391 }
392 }
393 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
394 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
395 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
396 READ_BUF(expected_len - len);
397 else if (len != expected_len)
398 goto xdr_error;
399
400 DECODE_TAIL;
401
402 out_nfserr:
403 status = nfserrno(host_err);
404 goto out;
405 }
406
407 static __be32
408 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
409 {
410 DECODE_HEAD;
411
412 READ_BUF(sizeof(stateid_t));
413 READ32(sid->si_generation);
414 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
415
416 DECODE_TAIL;
417 }
418
419 static __be32
420 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
421 {
422 DECODE_HEAD;
423
424 READ_BUF(4);
425 READ32(access->ac_req_access);
426
427 DECODE_TAIL;
428 }
429
430 static __be32
431 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
432 {
433 DECODE_HEAD;
434
435 close->cl_stateowner = NULL;
436 READ_BUF(4);
437 READ32(close->cl_seqid);
438 return nfsd4_decode_stateid(argp, &close->cl_stateid);
439
440 DECODE_TAIL;
441 }
442
443
444 static __be32
445 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
446 {
447 DECODE_HEAD;
448
449 READ_BUF(12);
450 READ64(commit->co_offset);
451 READ32(commit->co_count);
452
453 DECODE_TAIL;
454 }
455
456 static __be32
457 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
458 {
459 DECODE_HEAD;
460
461 READ_BUF(4);
462 READ32(create->cr_type);
463 switch (create->cr_type) {
464 case NF4LNK:
465 READ_BUF(4);
466 READ32(create->cr_linklen);
467 READ_BUF(create->cr_linklen);
468 SAVEMEM(create->cr_linkname, create->cr_linklen);
469 break;
470 case NF4BLK:
471 case NF4CHR:
472 READ_BUF(8);
473 READ32(create->cr_specdata1);
474 READ32(create->cr_specdata2);
475 break;
476 case NF4SOCK:
477 case NF4FIFO:
478 case NF4DIR:
479 default:
480 break;
481 }
482
483 READ_BUF(4);
484 READ32(create->cr_namelen);
485 READ_BUF(create->cr_namelen);
486 SAVEMEM(create->cr_name, create->cr_namelen);
487 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
488 return status;
489
490 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
491 &create->cr_acl);
492 if (status)
493 goto out;
494
495 DECODE_TAIL;
496 }
497
498 static inline __be32
499 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
500 {
501 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
502 }
503
504 static inline __be32
505 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
506 {
507 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
508 }
509
510 static __be32
511 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
512 {
513 DECODE_HEAD;
514
515 READ_BUF(4);
516 READ32(link->li_namelen);
517 READ_BUF(link->li_namelen);
518 SAVEMEM(link->li_name, link->li_namelen);
519 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
520 return status;
521
522 DECODE_TAIL;
523 }
524
525 static __be32
526 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
527 {
528 DECODE_HEAD;
529
530 lock->lk_replay_owner = NULL;
531 /*
532 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
533 */
534 READ_BUF(28);
535 READ32(lock->lk_type);
536 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
537 goto xdr_error;
538 READ32(lock->lk_reclaim);
539 READ64(lock->lk_offset);
540 READ64(lock->lk_length);
541 READ32(lock->lk_is_new);
542
543 if (lock->lk_is_new) {
544 READ_BUF(4);
545 READ32(lock->lk_new_open_seqid);
546 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
547 if (status)
548 return status;
549 READ_BUF(8 + sizeof(clientid_t));
550 READ32(lock->lk_new_lock_seqid);
551 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
552 READ32(lock->lk_new_owner.len);
553 READ_BUF(lock->lk_new_owner.len);
554 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
555 } else {
556 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
557 if (status)
558 return status;
559 READ_BUF(4);
560 READ32(lock->lk_old_lock_seqid);
561 }
562
563 DECODE_TAIL;
564 }
565
566 static __be32
567 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
568 {
569 DECODE_HEAD;
570
571 READ_BUF(32);
572 READ32(lockt->lt_type);
573 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
574 goto xdr_error;
575 READ64(lockt->lt_offset);
576 READ64(lockt->lt_length);
577 COPYMEM(&lockt->lt_clientid, 8);
578 READ32(lockt->lt_owner.len);
579 READ_BUF(lockt->lt_owner.len);
580 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
581
582 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
583 return nfserr_inval;
584 DECODE_TAIL;
585 }
586
587 static __be32
588 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
589 {
590 DECODE_HEAD;
591
592 locku->lu_stateowner = NULL;
593 READ_BUF(8);
594 READ32(locku->lu_type);
595 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
596 goto xdr_error;
597 READ32(locku->lu_seqid);
598 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
599 if (status)
600 return status;
601 READ_BUF(16);
602 READ64(locku->lu_offset);
603 READ64(locku->lu_length);
604
605 DECODE_TAIL;
606 }
607
608 static __be32
609 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
610 {
611 DECODE_HEAD;
612
613 READ_BUF(4);
614 READ32(lookup->lo_len);
615 READ_BUF(lookup->lo_len);
616 SAVEMEM(lookup->lo_name, lookup->lo_len);
617 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
618 return status;
619
620 DECODE_TAIL;
621 }
622
623 static __be32
624 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
625 {
626 DECODE_HEAD;
627
628 memset(open->op_bmval, 0, sizeof(open->op_bmval));
629 open->op_iattr.ia_valid = 0;
630 open->op_stateowner = NULL;
631
632 /* seqid, share_access, share_deny, clientid, ownerlen */
633 READ_BUF(16 + sizeof(clientid_t));
634 READ32(open->op_seqid);
635 READ32(open->op_share_access);
636 READ32(open->op_share_deny);
637 COPYMEM(&open->op_clientid, sizeof(clientid_t));
638 READ32(open->op_owner.len);
639
640 /* owner, open_flag */
641 READ_BUF(open->op_owner.len + 4);
642 SAVEMEM(open->op_owner.data, open->op_owner.len);
643 READ32(open->op_create);
644 switch (open->op_create) {
645 case NFS4_OPEN_NOCREATE:
646 break;
647 case NFS4_OPEN_CREATE:
648 READ_BUF(4);
649 READ32(open->op_createmode);
650 switch (open->op_createmode) {
651 case NFS4_CREATE_UNCHECKED:
652 case NFS4_CREATE_GUARDED:
653 status = nfsd4_decode_fattr(argp, open->op_bmval,
654 &open->op_iattr, &open->op_acl);
655 if (status)
656 goto out;
657 break;
658 case NFS4_CREATE_EXCLUSIVE:
659 READ_BUF(8);
660 COPYMEM(open->op_verf.data, 8);
661 break;
662 case NFS4_CREATE_EXCLUSIVE4_1:
663 if (argp->minorversion < 1)
664 goto xdr_error;
665 READ_BUF(8);
666 COPYMEM(open->op_verf.data, 8);
667 status = nfsd4_decode_fattr(argp, open->op_bmval,
668 &open->op_iattr, &open->op_acl);
669 if (status)
670 goto out;
671 break;
672 default:
673 goto xdr_error;
674 }
675 break;
676 default:
677 goto xdr_error;
678 }
679
680 /* open_claim */
681 READ_BUF(4);
682 READ32(open->op_claim_type);
683 switch (open->op_claim_type) {
684 case NFS4_OPEN_CLAIM_NULL:
685 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
686 READ_BUF(4);
687 READ32(open->op_fname.len);
688 READ_BUF(open->op_fname.len);
689 SAVEMEM(open->op_fname.data, open->op_fname.len);
690 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
691 return status;
692 break;
693 case NFS4_OPEN_CLAIM_PREVIOUS:
694 READ_BUF(4);
695 READ32(open->op_delegate_type);
696 break;
697 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
698 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
699 if (status)
700 return status;
701 READ_BUF(4);
702 READ32(open->op_fname.len);
703 READ_BUF(open->op_fname.len);
704 SAVEMEM(open->op_fname.data, open->op_fname.len);
705 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
706 return status;
707 break;
708 default:
709 goto xdr_error;
710 }
711
712 DECODE_TAIL;
713 }
714
715 static __be32
716 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
717 {
718 DECODE_HEAD;
719
720 open_conf->oc_stateowner = NULL;
721 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
722 if (status)
723 return status;
724 READ_BUF(4);
725 READ32(open_conf->oc_seqid);
726
727 DECODE_TAIL;
728 }
729
730 static __be32
731 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
732 {
733 DECODE_HEAD;
734
735 open_down->od_stateowner = NULL;
736 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
737 if (status)
738 return status;
739 READ_BUF(12);
740 READ32(open_down->od_seqid);
741 READ32(open_down->od_share_access);
742 READ32(open_down->od_share_deny);
743
744 DECODE_TAIL;
745 }
746
747 static __be32
748 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
749 {
750 DECODE_HEAD;
751
752 READ_BUF(4);
753 READ32(putfh->pf_fhlen);
754 if (putfh->pf_fhlen > NFS4_FHSIZE)
755 goto xdr_error;
756 READ_BUF(putfh->pf_fhlen);
757 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
758
759 DECODE_TAIL;
760 }
761
762 static __be32
763 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
764 {
765 DECODE_HEAD;
766
767 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
768 if (status)
769 return status;
770 READ_BUF(12);
771 READ64(read->rd_offset);
772 READ32(read->rd_length);
773
774 DECODE_TAIL;
775 }
776
777 static __be32
778 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
779 {
780 DECODE_HEAD;
781
782 READ_BUF(24);
783 READ64(readdir->rd_cookie);
784 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
785 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
786 READ32(readdir->rd_maxcount);
787 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
788 goto out;
789
790 DECODE_TAIL;
791 }
792
793 static __be32
794 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
795 {
796 DECODE_HEAD;
797
798 READ_BUF(4);
799 READ32(remove->rm_namelen);
800 READ_BUF(remove->rm_namelen);
801 SAVEMEM(remove->rm_name, remove->rm_namelen);
802 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
803 return status;
804
805 DECODE_TAIL;
806 }
807
808 static __be32
809 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
810 {
811 DECODE_HEAD;
812
813 READ_BUF(4);
814 READ32(rename->rn_snamelen);
815 READ_BUF(rename->rn_snamelen + 4);
816 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
817 READ32(rename->rn_tnamelen);
818 READ_BUF(rename->rn_tnamelen);
819 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
820 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
821 return status;
822 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
823 return status;
824
825 DECODE_TAIL;
826 }
827
828 static __be32
829 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
830 {
831 DECODE_HEAD;
832
833 READ_BUF(sizeof(clientid_t));
834 COPYMEM(clientid, sizeof(clientid_t));
835
836 DECODE_TAIL;
837 }
838
839 static __be32
840 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
841 struct nfsd4_secinfo *secinfo)
842 {
843 DECODE_HEAD;
844
845 READ_BUF(4);
846 READ32(secinfo->si_namelen);
847 READ_BUF(secinfo->si_namelen);
848 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
849 status = check_filename(secinfo->si_name, secinfo->si_namelen,
850 nfserr_noent);
851 if (status)
852 return status;
853 DECODE_TAIL;
854 }
855
856 static __be32
857 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
858 {
859 __be32 status;
860
861 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
862 if (status)
863 return status;
864 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
865 &setattr->sa_acl);
866 }
867
868 static __be32
869 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
870 {
871 DECODE_HEAD;
872
873 READ_BUF(12);
874 COPYMEM(setclientid->se_verf.data, 8);
875 READ32(setclientid->se_namelen);
876
877 READ_BUF(setclientid->se_namelen + 8);
878 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
879 READ32(setclientid->se_callback_prog);
880 READ32(setclientid->se_callback_netid_len);
881
882 READ_BUF(setclientid->se_callback_netid_len + 4);
883 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
884 READ32(setclientid->se_callback_addr_len);
885
886 READ_BUF(setclientid->se_callback_addr_len + 4);
887 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
888 READ32(setclientid->se_callback_ident);
889
890 DECODE_TAIL;
891 }
892
893 static __be32
894 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
895 {
896 DECODE_HEAD;
897
898 READ_BUF(8 + sizeof(nfs4_verifier));
899 COPYMEM(&scd_c->sc_clientid, 8);
900 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
901
902 DECODE_TAIL;
903 }
904
905 /* Also used for NVERIFY */
906 static __be32
907 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
908 {
909 #if 0
910 struct nfsd4_compoundargs save = {
911 .p = argp->p,
912 .end = argp->end,
913 .rqstp = argp->rqstp,
914 };
915 u32 ve_bmval[2];
916 struct iattr ve_iattr; /* request */
917 struct nfs4_acl *ve_acl; /* request */
918 #endif
919 DECODE_HEAD;
920
921 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
922 goto out;
923
924 /* For convenience's sake, we compare raw xdr'd attributes in
925 * nfsd4_proc_verify; however we still decode here just to return
926 * correct error in case of bad xdr. */
927 #if 0
928 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
929 if (status == nfserr_inval) {
930 status = nfserrno(status);
931 goto out;
932 }
933 #endif
934 READ_BUF(4);
935 READ32(verify->ve_attrlen);
936 READ_BUF(verify->ve_attrlen);
937 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
938
939 DECODE_TAIL;
940 }
941
942 static __be32
943 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
944 {
945 int avail;
946 int v;
947 int len;
948 DECODE_HEAD;
949
950 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
951 if (status)
952 return status;
953 READ_BUF(16);
954 READ64(write->wr_offset);
955 READ32(write->wr_stable_how);
956 if (write->wr_stable_how > 2)
957 goto xdr_error;
958 READ32(write->wr_buflen);
959
960 /* Sorry .. no magic macros for this.. *
961 * READ_BUF(write->wr_buflen);
962 * SAVEMEM(write->wr_buf, write->wr_buflen);
963 */
964 avail = (char*)argp->end - (char*)argp->p;
965 if (avail + argp->pagelen < write->wr_buflen) {
966 dprintk("NFSD: xdr error (%s:%d)\n",
967 __FILE__, __LINE__);
968 goto xdr_error;
969 }
970 argp->rqstp->rq_vec[0].iov_base = p;
971 argp->rqstp->rq_vec[0].iov_len = avail;
972 v = 0;
973 len = write->wr_buflen;
974 while (len > argp->rqstp->rq_vec[v].iov_len) {
975 len -= argp->rqstp->rq_vec[v].iov_len;
976 v++;
977 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
978 argp->pagelist++;
979 if (argp->pagelen >= PAGE_SIZE) {
980 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
981 argp->pagelen -= PAGE_SIZE;
982 } else {
983 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
984 argp->pagelen -= len;
985 }
986 }
987 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
988 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
989 argp->rqstp->rq_vec[v].iov_len = len;
990 write->wr_vlen = v+1;
991
992 DECODE_TAIL;
993 }
994
995 static __be32
996 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
997 {
998 DECODE_HEAD;
999
1000 READ_BUF(12);
1001 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1002 READ32(rlockowner->rl_owner.len);
1003 READ_BUF(rlockowner->rl_owner.len);
1004 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1005
1006 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1007 return nfserr_inval;
1008 DECODE_TAIL;
1009 }
1010
1011 static __be32
1012 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1013 struct nfsd4_exchange_id *exid)
1014 {
1015 int dummy;
1016 DECODE_HEAD;
1017
1018 READ_BUF(NFS4_VERIFIER_SIZE);
1019 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1020
1021 READ_BUF(4);
1022 READ32(exid->clname.len);
1023
1024 READ_BUF(exid->clname.len);
1025 SAVEMEM(exid->clname.data, exid->clname.len);
1026
1027 READ_BUF(4);
1028 READ32(exid->flags);
1029
1030 /* Ignore state_protect4_a */
1031 READ_BUF(4);
1032 READ32(exid->spa_how);
1033 switch (exid->spa_how) {
1034 case SP4_NONE:
1035 break;
1036 case SP4_MACH_CRED:
1037 /* spo_must_enforce */
1038 READ_BUF(4);
1039 READ32(dummy);
1040 READ_BUF(dummy * 4);
1041 p += dummy;
1042
1043 /* spo_must_allow */
1044 READ_BUF(4);
1045 READ32(dummy);
1046 READ_BUF(dummy * 4);
1047 p += dummy;
1048 break;
1049 case SP4_SSV:
1050 /* ssp_ops */
1051 READ_BUF(4);
1052 READ32(dummy);
1053 READ_BUF(dummy * 4);
1054 p += dummy;
1055
1056 READ_BUF(4);
1057 READ32(dummy);
1058 READ_BUF(dummy * 4);
1059 p += dummy;
1060
1061 /* ssp_hash_algs<> */
1062 READ_BUF(4);
1063 READ32(dummy);
1064 READ_BUF(dummy);
1065 p += XDR_QUADLEN(dummy);
1066
1067 /* ssp_encr_algs<> */
1068 READ_BUF(4);
1069 READ32(dummy);
1070 READ_BUF(dummy);
1071 p += XDR_QUADLEN(dummy);
1072
1073 /* ssp_window and ssp_num_gss_handles */
1074 READ_BUF(8);
1075 READ32(dummy);
1076 READ32(dummy);
1077 break;
1078 default:
1079 goto xdr_error;
1080 }
1081
1082 /* Ignore Implementation ID */
1083 READ_BUF(4); /* nfs_impl_id4 array length */
1084 READ32(dummy);
1085
1086 if (dummy > 1)
1087 goto xdr_error;
1088
1089 if (dummy == 1) {
1090 /* nii_domain */
1091 READ_BUF(4);
1092 READ32(dummy);
1093 READ_BUF(dummy);
1094 p += XDR_QUADLEN(dummy);
1095
1096 /* nii_name */
1097 READ_BUF(4);
1098 READ32(dummy);
1099 READ_BUF(dummy);
1100 p += XDR_QUADLEN(dummy);
1101
1102 /* nii_date */
1103 READ_BUF(12);
1104 p += 3;
1105 }
1106 DECODE_TAIL;
1107 }
1108
1109 static __be32
1110 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_create_session *sess)
1112 {
1113 DECODE_HEAD;
1114
1115 u32 dummy;
1116 char *machine_name;
1117 int i;
1118 int nr_secflavs;
1119
1120 READ_BUF(16);
1121 COPYMEM(&sess->clientid, 8);
1122 READ32(sess->seqid);
1123 READ32(sess->flags);
1124
1125 /* Fore channel attrs */
1126 READ_BUF(28);
1127 READ32(dummy); /* headerpadsz is always 0 */
1128 READ32(sess->fore_channel.maxreq_sz);
1129 READ32(sess->fore_channel.maxresp_sz);
1130 READ32(sess->fore_channel.maxresp_cached);
1131 READ32(sess->fore_channel.maxops);
1132 READ32(sess->fore_channel.maxreqs);
1133 READ32(sess->fore_channel.nr_rdma_attrs);
1134 if (sess->fore_channel.nr_rdma_attrs == 1) {
1135 READ_BUF(4);
1136 READ32(sess->fore_channel.rdma_attrs);
1137 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1138 dprintk("Too many fore channel attr bitmaps!\n");
1139 goto xdr_error;
1140 }
1141
1142 /* Back channel attrs */
1143 READ_BUF(28);
1144 READ32(dummy); /* headerpadsz is always 0 */
1145 READ32(sess->back_channel.maxreq_sz);
1146 READ32(sess->back_channel.maxresp_sz);
1147 READ32(sess->back_channel.maxresp_cached);
1148 READ32(sess->back_channel.maxops);
1149 READ32(sess->back_channel.maxreqs);
1150 READ32(sess->back_channel.nr_rdma_attrs);
1151 if (sess->back_channel.nr_rdma_attrs == 1) {
1152 READ_BUF(4);
1153 READ32(sess->back_channel.rdma_attrs);
1154 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1155 dprintk("Too many back channel attr bitmaps!\n");
1156 goto xdr_error;
1157 }
1158
1159 READ_BUF(8);
1160 READ32(sess->callback_prog);
1161
1162 /* callback_sec_params4 */
1163 READ32(nr_secflavs);
1164 for (i = 0; i < nr_secflavs; ++i) {
1165 READ_BUF(4);
1166 READ32(dummy);
1167 switch (dummy) {
1168 case RPC_AUTH_NULL:
1169 /* Nothing to read */
1170 break;
1171 case RPC_AUTH_UNIX:
1172 READ_BUF(8);
1173 /* stamp */
1174 READ32(dummy);
1175
1176 /* machine name */
1177 READ32(dummy);
1178 READ_BUF(dummy);
1179 SAVEMEM(machine_name, dummy);
1180
1181 /* uid, gid */
1182 READ_BUF(8);
1183 READ32(sess->uid);
1184 READ32(sess->gid);
1185
1186 /* more gids */
1187 READ_BUF(4);
1188 READ32(dummy);
1189 READ_BUF(dummy * 4);
1190 for (i = 0; i < dummy; ++i)
1191 READ32(dummy);
1192 break;
1193 case RPC_AUTH_GSS:
1194 dprintk("RPC_AUTH_GSS callback secflavor "
1195 "not supported!\n");
1196 READ_BUF(8);
1197 /* gcbp_service */
1198 READ32(dummy);
1199 /* gcbp_handle_from_server */
1200 READ32(dummy);
1201 READ_BUF(dummy);
1202 p += XDR_QUADLEN(dummy);
1203 /* gcbp_handle_from_client */
1204 READ_BUF(4);
1205 READ32(dummy);
1206 READ_BUF(dummy);
1207 p += XDR_QUADLEN(dummy);
1208 break;
1209 default:
1210 dprintk("Illegal callback secflavor\n");
1211 return nfserr_inval;
1212 }
1213 }
1214 DECODE_TAIL;
1215 }
1216
1217 static __be32
1218 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1219 struct nfsd4_destroy_session *destroy_session)
1220 {
1221 DECODE_HEAD;
1222 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1223 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1224
1225 DECODE_TAIL;
1226 }
1227
1228 static __be32
1229 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1230 struct nfsd4_sequence *seq)
1231 {
1232 DECODE_HEAD;
1233
1234 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1235 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1236 READ32(seq->seqid);
1237 READ32(seq->slotid);
1238 READ32(seq->maxslots);
1239 READ32(seq->cachethis);
1240
1241 DECODE_TAIL;
1242 }
1243
1244 static __be32
1245 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1246 {
1247 return nfs_ok;
1248 }
1249
1250 static __be32
1251 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1252 {
1253 return nfserr_notsupp;
1254 }
1255
1256 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1257
1258 static nfsd4_dec nfsd4_dec_ops[] = {
1259 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1260 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1261 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1262 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1263 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1264 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1265 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1266 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1267 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1268 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1269 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1270 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1271 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1272 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1274 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1275 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1276 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1277 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1278 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1279 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1280 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1281 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1282 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1283 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1284 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1285 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1286 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1287 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1288 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1289 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1290 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1291 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1292 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1293 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1294 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1295 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1296 };
1297
1298 static nfsd4_dec nfsd41_dec_ops[] = {
1299 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1300 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1301 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1302 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1303 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1304 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1305 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1306 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1307 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1308 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1309 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1310 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1311 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1312 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1314 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1315 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1316 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1317 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1318 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1319 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1320 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1321 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1322 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1323 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1324 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1325 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1326 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1327 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1328 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1329 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1330 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1331 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1332 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1333 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1334 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1335 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1336
1337 /* new operations for NFSv4.1 */
1338 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1341 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1342 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1343 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1350 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1351 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1352 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1353 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1356 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
1357 };
1358
1359 struct nfsd4_minorversion_ops {
1360 nfsd4_dec *decoders;
1361 int nops;
1362 };
1363
1364 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1365 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1366 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1367 };
1368
1369 static __be32
1370 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1371 {
1372 DECODE_HEAD;
1373 struct nfsd4_op *op;
1374 struct nfsd4_minorversion_ops *ops;
1375 int i;
1376
1377 /*
1378 * XXX: According to spec, we should check the tag
1379 * for UTF-8 compliance. I'm postponing this for
1380 * now because it seems that some clients do use
1381 * binary tags.
1382 */
1383 READ_BUF(4);
1384 READ32(argp->taglen);
1385 READ_BUF(argp->taglen + 8);
1386 SAVEMEM(argp->tag, argp->taglen);
1387 READ32(argp->minorversion);
1388 READ32(argp->opcnt);
1389
1390 if (argp->taglen > NFSD4_MAX_TAGLEN)
1391 goto xdr_error;
1392 if (argp->opcnt > 100)
1393 goto xdr_error;
1394
1395 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1396 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1397 if (!argp->ops) {
1398 argp->ops = argp->iops;
1399 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1400 goto xdr_error;
1401 }
1402 }
1403
1404 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1405 argp->opcnt = 0;
1406
1407 ops = &nfsd4_minorversion[argp->minorversion];
1408 for (i = 0; i < argp->opcnt; i++) {
1409 op = &argp->ops[i];
1410 op->replay = NULL;
1411
1412 /*
1413 * We can't use READ_BUF() here because we need to handle
1414 * a missing opcode as an OP_WRITE + 1. So we need to check
1415 * to see if we're truly at the end of our buffer or if there
1416 * is another page we need to flip to.
1417 */
1418
1419 if (argp->p == argp->end) {
1420 if (argp->pagelen < 4) {
1421 /* There isn't an opcode still on the wire */
1422 op->opnum = OP_WRITE + 1;
1423 op->status = nfserr_bad_xdr;
1424 argp->opcnt = i+1;
1425 break;
1426 }
1427
1428 /*
1429 * False alarm. We just hit a page boundary, but there
1430 * is still data available. Move pointer across page
1431 * boundary. *snip from READ_BUF*
1432 */
1433 argp->p = page_address(argp->pagelist[0]);
1434 argp->pagelist++;
1435 if (argp->pagelen < PAGE_SIZE) {
1436 argp->end = p + (argp->pagelen>>2);
1437 argp->pagelen = 0;
1438 } else {
1439 argp->end = p + (PAGE_SIZE>>2);
1440 argp->pagelen -= PAGE_SIZE;
1441 }
1442 }
1443 op->opnum = ntohl(*argp->p++);
1444
1445 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1446 op->status = ops->decoders[op->opnum](argp, &op->u);
1447 else {
1448 op->opnum = OP_ILLEGAL;
1449 op->status = nfserr_op_illegal;
1450 }
1451
1452 if (op->status) {
1453 argp->opcnt = i+1;
1454 break;
1455 }
1456 }
1457
1458 DECODE_TAIL;
1459 }
1460
1461 #define WRITE32(n) *p++ = htonl(n)
1462 #define WRITE64(n) do { \
1463 *p++ = htonl((u32)((n) >> 32)); \
1464 *p++ = htonl((u32)(n)); \
1465 } while (0)
1466 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1467 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1468 memcpy(p, ptr, nbytes); \
1469 p += XDR_QUADLEN(nbytes); \
1470 }} while (0)
1471
1472 static void write32(__be32 **p, u32 n)
1473 {
1474 *(*p)++ = n;
1475 }
1476
1477 static void write64(__be32 **p, u64 n)
1478 {
1479 write32(p, (u32)(n >> 32));
1480 write32(p, (u32)n);
1481 }
1482
1483 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1484 {
1485 if (IS_I_VERSION(inode)) {
1486 write64(p, inode->i_version);
1487 } else {
1488 write32(p, stat->ctime.tv_sec);
1489 write32(p, stat->ctime.tv_nsec);
1490 }
1491 }
1492
1493 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1494 {
1495 write32(p, c->atomic);
1496 if (c->change_supported) {
1497 write64(p, c->before_change);
1498 write64(p, c->after_change);
1499 } else {
1500 write32(p, c->before_ctime_sec);
1501 write32(p, c->before_ctime_nsec);
1502 write32(p, c->after_ctime_sec);
1503 write32(p, c->after_ctime_nsec);
1504 }
1505 }
1506
1507 #define RESERVE_SPACE(nbytes) do { \
1508 p = resp->p; \
1509 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1510 } while (0)
1511 #define ADJUST_ARGS() resp->p = p
1512
1513 /*
1514 * Header routine to setup seqid operation replay cache
1515 */
1516 #define ENCODE_SEQID_OP_HEAD \
1517 __be32 *save; \
1518 \
1519 save = resp->p;
1520
1521 /*
1522 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1523 * is where sequence id's are incremented, and the replay cache is filled.
1524 * Note that we increment sequence id's here, at the last moment, so we're sure
1525 * we know whether the error to be returned is a sequence id mutating error.
1526 */
1527
1528 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1529 if (seqid_mutating_err(nfserr) && stateowner) { \
1530 stateowner->so_seqid++; \
1531 stateowner->so_replay.rp_status = nfserr; \
1532 stateowner->so_replay.rp_buflen = \
1533 (((char *)(resp)->p - (char *)save)); \
1534 memcpy(stateowner->so_replay.rp_buf, save, \
1535 stateowner->so_replay.rp_buflen); \
1536 } } while (0);
1537
1538 /* Encode as an array of strings the string given with components
1539 * seperated @sep.
1540 */
1541 static __be32 nfsd4_encode_components(char sep, char *components,
1542 __be32 **pp, int *buflen)
1543 {
1544 __be32 *p = *pp;
1545 __be32 *countp = p;
1546 int strlen, count=0;
1547 char *str, *end;
1548
1549 dprintk("nfsd4_encode_components(%s)\n", components);
1550 if ((*buflen -= 4) < 0)
1551 return nfserr_resource;
1552 WRITE32(0); /* We will fill this in with @count later */
1553 end = str = components;
1554 while (*end) {
1555 for (; *end && (*end != sep); end++)
1556 ; /* Point to end of component */
1557 strlen = end - str;
1558 if (strlen) {
1559 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1560 return nfserr_resource;
1561 WRITE32(strlen);
1562 WRITEMEM(str, strlen);
1563 count++;
1564 }
1565 else
1566 end++;
1567 str = end;
1568 }
1569 *pp = p;
1570 p = countp;
1571 WRITE32(count);
1572 return 0;
1573 }
1574
1575 /*
1576 * encode a location element of a fs_locations structure
1577 */
1578 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1579 __be32 **pp, int *buflen)
1580 {
1581 __be32 status;
1582 __be32 *p = *pp;
1583
1584 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1585 if (status)
1586 return status;
1587 status = nfsd4_encode_components('/', location->path, &p, buflen);
1588 if (status)
1589 return status;
1590 *pp = p;
1591 return 0;
1592 }
1593
1594 /*
1595 * Return the path to an export point in the pseudo filesystem namespace
1596 * Returned string is safe to use as long as the caller holds a reference
1597 * to @exp.
1598 */
1599 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1600 {
1601 struct svc_fh tmp_fh;
1602 char *path = NULL, *rootpath;
1603 size_t rootlen;
1604
1605 fh_init(&tmp_fh, NFS4_FHSIZE);
1606 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1607 if (*stat)
1608 return NULL;
1609 rootpath = tmp_fh.fh_export->ex_pathname;
1610
1611 path = exp->ex_pathname;
1612
1613 rootlen = strlen(rootpath);
1614 if (strncmp(path, rootpath, rootlen)) {
1615 dprintk("nfsd: fs_locations failed;"
1616 "%s is not contained in %s\n", path, rootpath);
1617 *stat = nfserr_notsupp;
1618 path = NULL;
1619 goto out;
1620 }
1621 path += rootlen;
1622 out:
1623 fh_put(&tmp_fh);
1624 return path;
1625 }
1626
1627 /*
1628 * encode a fs_locations structure
1629 */
1630 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1631 struct svc_export *exp,
1632 __be32 **pp, int *buflen)
1633 {
1634 __be32 status;
1635 int i;
1636 __be32 *p = *pp;
1637 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1638 char *root = nfsd4_path(rqstp, exp, &status);
1639
1640 if (status)
1641 return status;
1642 status = nfsd4_encode_components('/', root, &p, buflen);
1643 if (status)
1644 return status;
1645 if ((*buflen -= 4) < 0)
1646 return nfserr_resource;
1647 WRITE32(fslocs->locations_count);
1648 for (i=0; i<fslocs->locations_count; i++) {
1649 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1650 &p, buflen);
1651 if (status)
1652 return status;
1653 }
1654 *pp = p;
1655 return 0;
1656 }
1657
1658 static u32 nfs4_ftypes[16] = {
1659 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1660 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1661 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1662 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1663 };
1664
1665 static __be32
1666 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1667 __be32 **p, int *buflen)
1668 {
1669 int status;
1670
1671 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1672 return nfserr_resource;
1673 if (whotype != NFS4_ACL_WHO_NAMED)
1674 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1675 else if (group)
1676 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1677 else
1678 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1679 if (status < 0)
1680 return nfserrno(status);
1681 *p = xdr_encode_opaque(*p, NULL, status);
1682 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1683 BUG_ON(*buflen < 0);
1684 return 0;
1685 }
1686
1687 static inline __be32
1688 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1689 {
1690 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1691 }
1692
1693 static inline __be32
1694 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1695 {
1696 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1697 }
1698
1699 static inline __be32
1700 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1701 __be32 **p, int *buflen)
1702 {
1703 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1704 }
1705
1706 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1707 FATTR4_WORD0_RDATTR_ERROR)
1708 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1709
1710 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1711 {
1712 /* As per referral draft: */
1713 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1714 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1715 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1716 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1717 *rdattr_err = NFSERR_MOVED;
1718 else
1719 return nfserr_moved;
1720 }
1721 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1722 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1723 return 0;
1724 }
1725
1726 /*
1727 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1728 * ourselves.
1729 *
1730 * @countp is the buffer size in _words_; upon successful return this becomes
1731 * replaced with the number of words written.
1732 */
1733 __be32
1734 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1735 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1736 struct svc_rqst *rqstp, int ignore_crossmnt)
1737 {
1738 u32 bmval0 = bmval[0];
1739 u32 bmval1 = bmval[1];
1740 u32 bmval2 = bmval[2];
1741 struct kstat stat;
1742 struct svc_fh tempfh;
1743 struct kstatfs statfs;
1744 int buflen = *countp << 2;
1745 __be32 *attrlenp;
1746 u32 dummy;
1747 u64 dummy64;
1748 u32 rdattr_err = 0;
1749 __be32 *p = buffer;
1750 __be32 status;
1751 int err;
1752 int aclsupport = 0;
1753 struct nfs4_acl *acl = NULL;
1754 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1755 u32 minorversion = resp->cstate.minorversion;
1756
1757 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1758 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1759 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1760 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1761
1762 if (exp->ex_fslocs.migrated) {
1763 BUG_ON(bmval[2]);
1764 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1765 if (status)
1766 goto out;
1767 }
1768
1769 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1770 if (err)
1771 goto out_nfserr;
1772 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1773 FATTR4_WORD0_MAXNAME)) ||
1774 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1775 FATTR4_WORD1_SPACE_TOTAL))) {
1776 err = vfs_statfs(dentry, &statfs);
1777 if (err)
1778 goto out_nfserr;
1779 }
1780 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1781 fh_init(&tempfh, NFS4_FHSIZE);
1782 status = fh_compose(&tempfh, exp, dentry, NULL);
1783 if (status)
1784 goto out;
1785 fhp = &tempfh;
1786 }
1787 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1788 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1789 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1790 aclsupport = (err == 0);
1791 if (bmval0 & FATTR4_WORD0_ACL) {
1792 if (err == -EOPNOTSUPP)
1793 bmval0 &= ~FATTR4_WORD0_ACL;
1794 else if (err == -EINVAL) {
1795 status = nfserr_attrnotsupp;
1796 goto out;
1797 } else if (err != 0)
1798 goto out_nfserr;
1799 }
1800 }
1801 if ((buflen -= 16) < 0)
1802 goto out_resource;
1803
1804 if (unlikely(bmval2)) {
1805 WRITE32(3);
1806 WRITE32(bmval0);
1807 WRITE32(bmval1);
1808 WRITE32(bmval2);
1809 } else if (likely(bmval1)) {
1810 WRITE32(2);
1811 WRITE32(bmval0);
1812 WRITE32(bmval1);
1813 } else {
1814 WRITE32(1);
1815 WRITE32(bmval0);
1816 }
1817 attrlenp = p++; /* to be backfilled later */
1818
1819 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1820 u32 word0 = nfsd_suppattrs0(minorversion);
1821 u32 word1 = nfsd_suppattrs1(minorversion);
1822 u32 word2 = nfsd_suppattrs2(minorversion);
1823
1824 if ((buflen -= 12) < 0)
1825 goto out_resource;
1826 if (!aclsupport)
1827 word0 &= ~FATTR4_WORD0_ACL;
1828 if (!word2) {
1829 WRITE32(2);
1830 WRITE32(word0);
1831 WRITE32(word1);
1832 } else {
1833 WRITE32(3);
1834 WRITE32(word0);
1835 WRITE32(word1);
1836 WRITE32(word2);
1837 }
1838 }
1839 if (bmval0 & FATTR4_WORD0_TYPE) {
1840 if ((buflen -= 4) < 0)
1841 goto out_resource;
1842 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1843 if (dummy == NF4BAD)
1844 goto out_serverfault;
1845 WRITE32(dummy);
1846 }
1847 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1848 if ((buflen -= 4) < 0)
1849 goto out_resource;
1850 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1851 WRITE32(NFS4_FH_PERSISTENT);
1852 else
1853 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1854 }
1855 if (bmval0 & FATTR4_WORD0_CHANGE) {
1856 if ((buflen -= 8) < 0)
1857 goto out_resource;
1858 write_change(&p, &stat, dentry->d_inode);
1859 }
1860 if (bmval0 & FATTR4_WORD0_SIZE) {
1861 if ((buflen -= 8) < 0)
1862 goto out_resource;
1863 WRITE64(stat.size);
1864 }
1865 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1866 if ((buflen -= 4) < 0)
1867 goto out_resource;
1868 WRITE32(1);
1869 }
1870 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1871 if ((buflen -= 4) < 0)
1872 goto out_resource;
1873 WRITE32(1);
1874 }
1875 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1876 if ((buflen -= 4) < 0)
1877 goto out_resource;
1878 WRITE32(0);
1879 }
1880 if (bmval0 & FATTR4_WORD0_FSID) {
1881 if ((buflen -= 16) < 0)
1882 goto out_resource;
1883 if (exp->ex_fslocs.migrated) {
1884 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1885 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1886 } else switch(fsid_source(fhp)) {
1887 case FSIDSOURCE_FSID:
1888 WRITE64((u64)exp->ex_fsid);
1889 WRITE64((u64)0);
1890 break;
1891 case FSIDSOURCE_DEV:
1892 WRITE32(0);
1893 WRITE32(MAJOR(stat.dev));
1894 WRITE32(0);
1895 WRITE32(MINOR(stat.dev));
1896 break;
1897 case FSIDSOURCE_UUID:
1898 WRITEMEM(exp->ex_uuid, 16);
1899 break;
1900 }
1901 }
1902 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1903 if ((buflen -= 4) < 0)
1904 goto out_resource;
1905 WRITE32(0);
1906 }
1907 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1908 if ((buflen -= 4) < 0)
1909 goto out_resource;
1910 WRITE32(NFSD_LEASE_TIME);
1911 }
1912 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1913 if ((buflen -= 4) < 0)
1914 goto out_resource;
1915 WRITE32(rdattr_err);
1916 }
1917 if (bmval0 & FATTR4_WORD0_ACL) {
1918 struct nfs4_ace *ace;
1919
1920 if (acl == NULL) {
1921 if ((buflen -= 4) < 0)
1922 goto out_resource;
1923
1924 WRITE32(0);
1925 goto out_acl;
1926 }
1927 if ((buflen -= 4) < 0)
1928 goto out_resource;
1929 WRITE32(acl->naces);
1930
1931 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1932 if ((buflen -= 4*3) < 0)
1933 goto out_resource;
1934 WRITE32(ace->type);
1935 WRITE32(ace->flag);
1936 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1937 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1938 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1939 &p, &buflen);
1940 if (status == nfserr_resource)
1941 goto out_resource;
1942 if (status)
1943 goto out;
1944 }
1945 }
1946 out_acl:
1947 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1948 if ((buflen -= 4) < 0)
1949 goto out_resource;
1950 WRITE32(aclsupport ?
1951 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1952 }
1953 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1954 if ((buflen -= 4) < 0)
1955 goto out_resource;
1956 WRITE32(1);
1957 }
1958 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1959 if ((buflen -= 4) < 0)
1960 goto out_resource;
1961 WRITE32(1);
1962 }
1963 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1964 if ((buflen -= 4) < 0)
1965 goto out_resource;
1966 WRITE32(1);
1967 }
1968 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1969 if ((buflen -= 4) < 0)
1970 goto out_resource;
1971 WRITE32(1);
1972 }
1973 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1974 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1975 if (buflen < 0)
1976 goto out_resource;
1977 WRITE32(fhp->fh_handle.fh_size);
1978 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1979 }
1980 if (bmval0 & FATTR4_WORD0_FILEID) {
1981 if ((buflen -= 8) < 0)
1982 goto out_resource;
1983 WRITE64(stat.ino);
1984 }
1985 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1986 if ((buflen -= 8) < 0)
1987 goto out_resource;
1988 WRITE64((u64) statfs.f_ffree);
1989 }
1990 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1991 if ((buflen -= 8) < 0)
1992 goto out_resource;
1993 WRITE64((u64) statfs.f_ffree);
1994 }
1995 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1996 if ((buflen -= 8) < 0)
1997 goto out_resource;
1998 WRITE64((u64) statfs.f_files);
1999 }
2000 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2001 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2002 if (status == nfserr_resource)
2003 goto out_resource;
2004 if (status)
2005 goto out;
2006 }
2007 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2008 if ((buflen -= 4) < 0)
2009 goto out_resource;
2010 WRITE32(1);
2011 }
2012 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2013 if ((buflen -= 8) < 0)
2014 goto out_resource;
2015 WRITE64(~(u64)0);
2016 }
2017 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2018 if ((buflen -= 4) < 0)
2019 goto out_resource;
2020 WRITE32(255);
2021 }
2022 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2023 if ((buflen -= 4) < 0)
2024 goto out_resource;
2025 WRITE32(statfs.f_namelen);
2026 }
2027 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2028 if ((buflen -= 8) < 0)
2029 goto out_resource;
2030 WRITE64((u64) svc_max_payload(rqstp));
2031 }
2032 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2033 if ((buflen -= 8) < 0)
2034 goto out_resource;
2035 WRITE64((u64) svc_max_payload(rqstp));
2036 }
2037 if (bmval1 & FATTR4_WORD1_MODE) {
2038 if ((buflen -= 4) < 0)
2039 goto out_resource;
2040 WRITE32(stat.mode & S_IALLUGO);
2041 }
2042 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2043 if ((buflen -= 4) < 0)
2044 goto out_resource;
2045 WRITE32(1);
2046 }
2047 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2048 if ((buflen -= 4) < 0)
2049 goto out_resource;
2050 WRITE32(stat.nlink);
2051 }
2052 if (bmval1 & FATTR4_WORD1_OWNER) {
2053 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2054 if (status == nfserr_resource)
2055 goto out_resource;
2056 if (status)
2057 goto out;
2058 }
2059 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2060 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2061 if (status == nfserr_resource)
2062 goto out_resource;
2063 if (status)
2064 goto out;
2065 }
2066 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2067 if ((buflen -= 8) < 0)
2068 goto out_resource;
2069 WRITE32((u32) MAJOR(stat.rdev));
2070 WRITE32((u32) MINOR(stat.rdev));
2071 }
2072 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2073 if ((buflen -= 8) < 0)
2074 goto out_resource;
2075 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2076 WRITE64(dummy64);
2077 }
2078 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2079 if ((buflen -= 8) < 0)
2080 goto out_resource;
2081 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2082 WRITE64(dummy64);
2083 }
2084 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2085 if ((buflen -= 8) < 0)
2086 goto out_resource;
2087 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2088 WRITE64(dummy64);
2089 }
2090 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2091 if ((buflen -= 8) < 0)
2092 goto out_resource;
2093 dummy64 = (u64)stat.blocks << 9;
2094 WRITE64(dummy64);
2095 }
2096 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2097 if ((buflen -= 12) < 0)
2098 goto out_resource;
2099 WRITE32(0);
2100 WRITE32(stat.atime.tv_sec);
2101 WRITE32(stat.atime.tv_nsec);
2102 }
2103 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2104 if ((buflen -= 12) < 0)
2105 goto out_resource;
2106 WRITE32(0);
2107 WRITE32(1);
2108 WRITE32(0);
2109 }
2110 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2111 if ((buflen -= 12) < 0)
2112 goto out_resource;
2113 WRITE32(0);
2114 WRITE32(stat.ctime.tv_sec);
2115 WRITE32(stat.ctime.tv_nsec);
2116 }
2117 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2118 if ((buflen -= 12) < 0)
2119 goto out_resource;
2120 WRITE32(0);
2121 WRITE32(stat.mtime.tv_sec);
2122 WRITE32(stat.mtime.tv_nsec);
2123 }
2124 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2125 if ((buflen -= 8) < 0)
2126 goto out_resource;
2127 /*
2128 * Get parent's attributes if not ignoring crossmount
2129 * and this is the root of a cross-mounted filesystem.
2130 */
2131 if (ignore_crossmnt == 0 &&
2132 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2133 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2134 exp->ex_path.mnt->mnt_mountpoint, &stat);
2135 if (err)
2136 goto out_nfserr;
2137 }
2138 WRITE64(stat.ino);
2139 }
2140 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2141 WRITE32(3);
2142 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2143 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2144 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2145 }
2146
2147 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2148 *countp = p - buffer;
2149 status = nfs_ok;
2150
2151 out:
2152 kfree(acl);
2153 if (fhp == &tempfh)
2154 fh_put(&tempfh);
2155 return status;
2156 out_nfserr:
2157 status = nfserrno(err);
2158 goto out;
2159 out_resource:
2160 *countp = 0;
2161 status = nfserr_resource;
2162 goto out;
2163 out_serverfault:
2164 status = nfserr_serverfault;
2165 goto out;
2166 }
2167
2168 static inline int attributes_need_mount(u32 *bmval)
2169 {
2170 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2171 return 1;
2172 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2173 return 1;
2174 return 0;
2175 }
2176
2177 static __be32
2178 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2179 const char *name, int namlen, __be32 *p, int *buflen)
2180 {
2181 struct svc_export *exp = cd->rd_fhp->fh_export;
2182 struct dentry *dentry;
2183 __be32 nfserr;
2184 int ignore_crossmnt = 0;
2185
2186 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2187 if (IS_ERR(dentry))
2188 return nfserrno(PTR_ERR(dentry));
2189 if (!dentry->d_inode) {
2190 /*
2191 * nfsd_buffered_readdir drops the i_mutex between
2192 * readdir and calling this callback, leaving a window
2193 * where this directory entry could have gone away.
2194 */
2195 dput(dentry);
2196 return nfserr_noent;
2197 }
2198
2199 exp_get(exp);
2200 /*
2201 * In the case of a mountpoint, the client may be asking for
2202 * attributes that are only properties of the underlying filesystem
2203 * as opposed to the cross-mounted file system. In such a case,
2204 * we will not follow the cross mount and will fill the attribtutes
2205 * directly from the mountpoint dentry.
2206 */
2207 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2208 ignore_crossmnt = 1;
2209 else if (d_mountpoint(dentry)) {
2210 int err;
2211
2212 /*
2213 * Why the heck aren't we just using nfsd_lookup??
2214 * Different "."/".." handling? Something else?
2215 * At least, add a comment here to explain....
2216 */
2217 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2218 if (err) {
2219 nfserr = nfserrno(err);
2220 goto out_put;
2221 }
2222 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2223 if (nfserr)
2224 goto out_put;
2225
2226 }
2227 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2228 cd->rd_rqstp, ignore_crossmnt);
2229 out_put:
2230 dput(dentry);
2231 exp_put(exp);
2232 return nfserr;
2233 }
2234
2235 static __be32 *
2236 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2237 {
2238 __be32 *attrlenp;
2239
2240 if (buflen < 6)
2241 return NULL;
2242 *p++ = htonl(2);
2243 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2244 *p++ = htonl(0); /* bmval1 */
2245
2246 attrlenp = p++;
2247 *p++ = nfserr; /* no htonl */
2248 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2249 return p;
2250 }
2251
2252 static int
2253 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2254 loff_t offset, u64 ino, unsigned int d_type)
2255 {
2256 struct readdir_cd *ccd = ccdv;
2257 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2258 int buflen;
2259 __be32 *p = cd->buffer;
2260 __be32 *cookiep;
2261 __be32 nfserr = nfserr_toosmall;
2262
2263 /* In nfsv4, "." and ".." never make it onto the wire.. */
2264 if (name && isdotent(name, namlen)) {
2265 cd->common.err = nfs_ok;
2266 return 0;
2267 }
2268
2269 if (cd->offset)
2270 xdr_encode_hyper(cd->offset, (u64) offset);
2271
2272 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2273 if (buflen < 0)
2274 goto fail;
2275
2276 *p++ = xdr_one; /* mark entry present */
2277 cookiep = p;
2278 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2279 p = xdr_encode_array(p, name, namlen); /* name length & name */
2280
2281 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2282 switch (nfserr) {
2283 case nfs_ok:
2284 p += buflen;
2285 break;
2286 case nfserr_resource:
2287 nfserr = nfserr_toosmall;
2288 goto fail;
2289 case nfserr_dropit:
2290 goto fail;
2291 case nfserr_noent:
2292 goto skip_entry;
2293 default:
2294 /*
2295 * If the client requested the RDATTR_ERROR attribute,
2296 * we stuff the error code into this attribute
2297 * and continue. If this attribute was not requested,
2298 * then in accordance with the spec, we fail the
2299 * entire READDIR operation(!)
2300 */
2301 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2302 goto fail;
2303 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2304 if (p == NULL) {
2305 nfserr = nfserr_toosmall;
2306 goto fail;
2307 }
2308 }
2309 cd->buflen -= (p - cd->buffer);
2310 cd->buffer = p;
2311 cd->offset = cookiep;
2312 skip_entry:
2313 cd->common.err = nfs_ok;
2314 return 0;
2315 fail:
2316 cd->common.err = nfserr;
2317 return -EINVAL;
2318 }
2319
2320 static void
2321 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2322 {
2323 __be32 *p;
2324
2325 RESERVE_SPACE(sizeof(stateid_t));
2326 WRITE32(sid->si_generation);
2327 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2328 ADJUST_ARGS();
2329 }
2330
2331 static __be32
2332 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2333 {
2334 __be32 *p;
2335
2336 if (!nfserr) {
2337 RESERVE_SPACE(8);
2338 WRITE32(access->ac_supported);
2339 WRITE32(access->ac_resp_access);
2340 ADJUST_ARGS();
2341 }
2342 return nfserr;
2343 }
2344
2345 static __be32
2346 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2347 {
2348 ENCODE_SEQID_OP_HEAD;
2349
2350 if (!nfserr)
2351 nfsd4_encode_stateid(resp, &close->cl_stateid);
2352
2353 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2354 return nfserr;
2355 }
2356
2357
2358 static __be32
2359 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2360 {
2361 __be32 *p;
2362
2363 if (!nfserr) {
2364 RESERVE_SPACE(8);
2365 WRITEMEM(commit->co_verf.data, 8);
2366 ADJUST_ARGS();
2367 }
2368 return nfserr;
2369 }
2370
2371 static __be32
2372 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2373 {
2374 __be32 *p;
2375
2376 if (!nfserr) {
2377 RESERVE_SPACE(32);
2378 write_cinfo(&p, &create->cr_cinfo);
2379 WRITE32(2);
2380 WRITE32(create->cr_bmval[0]);
2381 WRITE32(create->cr_bmval[1]);
2382 ADJUST_ARGS();
2383 }
2384 return nfserr;
2385 }
2386
2387 static __be32
2388 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2389 {
2390 struct svc_fh *fhp = getattr->ga_fhp;
2391 int buflen;
2392
2393 if (nfserr)
2394 return nfserr;
2395
2396 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2397 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2398 resp->p, &buflen, getattr->ga_bmval,
2399 resp->rqstp, 0);
2400 if (!nfserr)
2401 resp->p += buflen;
2402 return nfserr;
2403 }
2404
2405 static __be32
2406 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2407 {
2408 struct svc_fh *fhp = *fhpp;
2409 unsigned int len;
2410 __be32 *p;
2411
2412 if (!nfserr) {
2413 len = fhp->fh_handle.fh_size;
2414 RESERVE_SPACE(len + 4);
2415 WRITE32(len);
2416 WRITEMEM(&fhp->fh_handle.fh_base, len);
2417 ADJUST_ARGS();
2418 }
2419 return nfserr;
2420 }
2421
2422 /*
2423 * Including all fields other than the name, a LOCK4denied structure requires
2424 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2425 */
2426 static void
2427 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2428 {
2429 __be32 *p;
2430
2431 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2432 WRITE64(ld->ld_start);
2433 WRITE64(ld->ld_length);
2434 WRITE32(ld->ld_type);
2435 if (ld->ld_sop) {
2436 WRITEMEM(&ld->ld_clientid, 8);
2437 WRITE32(ld->ld_sop->so_owner.len);
2438 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2439 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2440 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2441 WRITE64((u64)0); /* clientid */
2442 WRITE32(0); /* length of owner name */
2443 }
2444 ADJUST_ARGS();
2445 }
2446
2447 static __be32
2448 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2449 {
2450 ENCODE_SEQID_OP_HEAD;
2451
2452 if (!nfserr)
2453 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2454 else if (nfserr == nfserr_denied)
2455 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2456
2457 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2458 return nfserr;
2459 }
2460
2461 static __be32
2462 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2463 {
2464 if (nfserr == nfserr_denied)
2465 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2466 return nfserr;
2467 }
2468
2469 static __be32
2470 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2471 {
2472 ENCODE_SEQID_OP_HEAD;
2473
2474 if (!nfserr)
2475 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2476
2477 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2478 return nfserr;
2479 }
2480
2481
2482 static __be32
2483 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2484 {
2485 __be32 *p;
2486
2487 if (!nfserr) {
2488 RESERVE_SPACE(20);
2489 write_cinfo(&p, &link->li_cinfo);
2490 ADJUST_ARGS();
2491 }
2492 return nfserr;
2493 }
2494
2495
2496 static __be32
2497 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2498 {
2499 __be32 *p;
2500 ENCODE_SEQID_OP_HEAD;
2501
2502 if (nfserr)
2503 goto out;
2504
2505 nfsd4_encode_stateid(resp, &open->op_stateid);
2506 RESERVE_SPACE(40);
2507 write_cinfo(&p, &open->op_cinfo);
2508 WRITE32(open->op_rflags);
2509 WRITE32(2);
2510 WRITE32(open->op_bmval[0]);
2511 WRITE32(open->op_bmval[1]);
2512 WRITE32(open->op_delegate_type);
2513 ADJUST_ARGS();
2514
2515 switch (open->op_delegate_type) {
2516 case NFS4_OPEN_DELEGATE_NONE:
2517 break;
2518 case NFS4_OPEN_DELEGATE_READ:
2519 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2520 RESERVE_SPACE(20);
2521 WRITE32(open->op_recall);
2522
2523 /*
2524 * TODO: ACE's in delegations
2525 */
2526 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2527 WRITE32(0);
2528 WRITE32(0);
2529 WRITE32(0); /* XXX: is NULL principal ok? */
2530 ADJUST_ARGS();
2531 break;
2532 case NFS4_OPEN_DELEGATE_WRITE:
2533 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2534 RESERVE_SPACE(32);
2535 WRITE32(0);
2536
2537 /*
2538 * TODO: space_limit's in delegations
2539 */
2540 WRITE32(NFS4_LIMIT_SIZE);
2541 WRITE32(~(u32)0);
2542 WRITE32(~(u32)0);
2543
2544 /*
2545 * TODO: ACE's in delegations
2546 */
2547 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2548 WRITE32(0);
2549 WRITE32(0);
2550 WRITE32(0); /* XXX: is NULL principal ok? */
2551 ADJUST_ARGS();
2552 break;
2553 default:
2554 BUG();
2555 }
2556 /* XXX save filehandle here */
2557 out:
2558 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2559 return nfserr;
2560 }
2561
2562 static __be32
2563 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2564 {
2565 ENCODE_SEQID_OP_HEAD;
2566
2567 if (!nfserr)
2568 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2569
2570 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2571 return nfserr;
2572 }
2573
2574 static __be32
2575 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2576 {
2577 ENCODE_SEQID_OP_HEAD;
2578
2579 if (!nfserr)
2580 nfsd4_encode_stateid(resp, &od->od_stateid);
2581
2582 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2583 return nfserr;
2584 }
2585
2586 static __be32
2587 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2588 struct nfsd4_read *read)
2589 {
2590 u32 eof;
2591 int v, pn;
2592 unsigned long maxcount;
2593 long len;
2594 __be32 *p;
2595
2596 if (nfserr)
2597 return nfserr;
2598 if (resp->xbuf->page_len)
2599 return nfserr_resource;
2600
2601 RESERVE_SPACE(8); /* eof flag and byte count */
2602
2603 maxcount = svc_max_payload(resp->rqstp);
2604 if (maxcount > read->rd_length)
2605 maxcount = read->rd_length;
2606
2607 len = maxcount;
2608 v = 0;
2609 while (len > 0) {
2610 pn = resp->rqstp->rq_resused++;
2611 resp->rqstp->rq_vec[v].iov_base =
2612 page_address(resp->rqstp->rq_respages[pn]);
2613 resp->rqstp->rq_vec[v].iov_len =
2614 len < PAGE_SIZE ? len : PAGE_SIZE;
2615 v++;
2616 len -= PAGE_SIZE;
2617 }
2618 read->rd_vlen = v;
2619
2620 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2621 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2622 &maxcount);
2623
2624 if (nfserr == nfserr_symlink)
2625 nfserr = nfserr_inval;
2626 if (nfserr)
2627 return nfserr;
2628 eof = (read->rd_offset + maxcount >=
2629 read->rd_fhp->fh_dentry->d_inode->i_size);
2630
2631 WRITE32(eof);
2632 WRITE32(maxcount);
2633 ADJUST_ARGS();
2634 resp->xbuf->head[0].iov_len = (char*)p
2635 - (char*)resp->xbuf->head[0].iov_base;
2636 resp->xbuf->page_len = maxcount;
2637
2638 /* Use rest of head for padding and remaining ops: */
2639 resp->xbuf->tail[0].iov_base = p;
2640 resp->xbuf->tail[0].iov_len = 0;
2641 if (maxcount&3) {
2642 RESERVE_SPACE(4);
2643 WRITE32(0);
2644 resp->xbuf->tail[0].iov_base += maxcount&3;
2645 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2646 ADJUST_ARGS();
2647 }
2648 return 0;
2649 }
2650
2651 static __be32
2652 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2653 {
2654 int maxcount;
2655 char *page;
2656 __be32 *p;
2657
2658 if (nfserr)
2659 return nfserr;
2660 if (resp->xbuf->page_len)
2661 return nfserr_resource;
2662
2663 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2664
2665 maxcount = PAGE_SIZE;
2666 RESERVE_SPACE(4);
2667
2668 /*
2669 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2670 * if they would overflow the buffer. Is this kosher in NFSv4? If
2671 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2672 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2673 */
2674 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2675 if (nfserr == nfserr_isdir)
2676 return nfserr_inval;
2677 if (nfserr)
2678 return nfserr;
2679
2680 WRITE32(maxcount);
2681 ADJUST_ARGS();
2682 resp->xbuf->head[0].iov_len = (char*)p
2683 - (char*)resp->xbuf->head[0].iov_base;
2684 resp->xbuf->page_len = maxcount;
2685
2686 /* Use rest of head for padding and remaining ops: */
2687 resp->xbuf->tail[0].iov_base = p;
2688 resp->xbuf->tail[0].iov_len = 0;
2689 if (maxcount&3) {
2690 RESERVE_SPACE(4);
2691 WRITE32(0);
2692 resp->xbuf->tail[0].iov_base += maxcount&3;
2693 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2694 ADJUST_ARGS();
2695 }
2696 return 0;
2697 }
2698
2699 static __be32
2700 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2701 {
2702 int maxcount;
2703 loff_t offset;
2704 __be32 *page, *savep, *tailbase;
2705 __be32 *p;
2706
2707 if (nfserr)
2708 return nfserr;
2709 if (resp->xbuf->page_len)
2710 return nfserr_resource;
2711
2712 RESERVE_SPACE(8); /* verifier */
2713 savep = p;
2714
2715 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2716 WRITE32(0);
2717 WRITE32(0);
2718 ADJUST_ARGS();
2719 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2720 tailbase = p;
2721
2722 maxcount = PAGE_SIZE;
2723 if (maxcount > readdir->rd_maxcount)
2724 maxcount = readdir->rd_maxcount;
2725
2726 /*
2727 * Convert from bytes to words, account for the two words already
2728 * written, make sure to leave two words at the end for the next
2729 * pointer and eof field.
2730 */
2731 maxcount = (maxcount >> 2) - 4;
2732 if (maxcount < 0) {
2733 nfserr = nfserr_toosmall;
2734 goto err_no_verf;
2735 }
2736
2737 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2738 readdir->common.err = 0;
2739 readdir->buflen = maxcount;
2740 readdir->buffer = page;
2741 readdir->offset = NULL;
2742
2743 offset = readdir->rd_cookie;
2744 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2745 &offset,
2746 &readdir->common, nfsd4_encode_dirent);
2747 if (nfserr == nfs_ok &&
2748 readdir->common.err == nfserr_toosmall &&
2749 readdir->buffer == page)
2750 nfserr = nfserr_toosmall;
2751 if (nfserr == nfserr_symlink)
2752 nfserr = nfserr_notdir;
2753 if (nfserr)
2754 goto err_no_verf;
2755
2756 if (readdir->offset)
2757 xdr_encode_hyper(readdir->offset, offset);
2758
2759 p = readdir->buffer;
2760 *p++ = 0; /* no more entries */
2761 *p++ = htonl(readdir->common.err == nfserr_eof);
2762 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2763 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2764
2765 /* Use rest of head for padding and remaining ops: */
2766 resp->xbuf->tail[0].iov_base = tailbase;
2767 resp->xbuf->tail[0].iov_len = 0;
2768 resp->p = resp->xbuf->tail[0].iov_base;
2769 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2770
2771 return 0;
2772 err_no_verf:
2773 p = savep;
2774 ADJUST_ARGS();
2775 return nfserr;
2776 }
2777
2778 static __be32
2779 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2780 {
2781 __be32 *p;
2782
2783 if (!nfserr) {
2784 RESERVE_SPACE(20);
2785 write_cinfo(&p, &remove->rm_cinfo);
2786 ADJUST_ARGS();
2787 }
2788 return nfserr;
2789 }
2790
2791 static __be32
2792 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2793 {
2794 __be32 *p;
2795
2796 if (!nfserr) {
2797 RESERVE_SPACE(40);
2798 write_cinfo(&p, &rename->rn_sinfo);
2799 write_cinfo(&p, &rename->rn_tinfo);
2800 ADJUST_ARGS();
2801 }
2802 return nfserr;
2803 }
2804
2805 static __be32
2806 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2807 struct nfsd4_secinfo *secinfo)
2808 {
2809 int i = 0;
2810 struct svc_export *exp = secinfo->si_exp;
2811 u32 nflavs;
2812 struct exp_flavor_info *flavs;
2813 struct exp_flavor_info def_flavs[2];
2814 __be32 *p;
2815
2816 if (nfserr)
2817 goto out;
2818 if (exp->ex_nflavors) {
2819 flavs = exp->ex_flavors;
2820 nflavs = exp->ex_nflavors;
2821 } else { /* Handling of some defaults in absence of real secinfo: */
2822 flavs = def_flavs;
2823 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2824 nflavs = 2;
2825 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2826 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2827 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2828 nflavs = 1;
2829 flavs[0].pseudoflavor
2830 = svcauth_gss_flavor(exp->ex_client);
2831 } else {
2832 nflavs = 1;
2833 flavs[0].pseudoflavor
2834 = exp->ex_client->flavour->flavour;
2835 }
2836 }
2837
2838 RESERVE_SPACE(4);
2839 WRITE32(nflavs);
2840 ADJUST_ARGS();
2841 for (i = 0; i < nflavs; i++) {
2842 u32 flav = flavs[i].pseudoflavor;
2843 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2844
2845 if (gm) {
2846 RESERVE_SPACE(4);
2847 WRITE32(RPC_AUTH_GSS);
2848 ADJUST_ARGS();
2849 RESERVE_SPACE(4 + gm->gm_oid.len);
2850 WRITE32(gm->gm_oid.len);
2851 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2852 ADJUST_ARGS();
2853 RESERVE_SPACE(4);
2854 WRITE32(0); /* qop */
2855 ADJUST_ARGS();
2856 RESERVE_SPACE(4);
2857 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2858 ADJUST_ARGS();
2859 gss_mech_put(gm);
2860 } else {
2861 RESERVE_SPACE(4);
2862 WRITE32(flav);
2863 ADJUST_ARGS();
2864 }
2865 }
2866 out:
2867 if (exp)
2868 exp_put(exp);
2869 return nfserr;
2870 }
2871
2872 /*
2873 * The SETATTR encode routine is special -- it always encodes a bitmap,
2874 * regardless of the error status.
2875 */
2876 static __be32
2877 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2878 {
2879 __be32 *p;
2880
2881 RESERVE_SPACE(12);
2882 if (nfserr) {
2883 WRITE32(2);
2884 WRITE32(0);
2885 WRITE32(0);
2886 }
2887 else {
2888 WRITE32(2);
2889 WRITE32(setattr->sa_bmval[0]);
2890 WRITE32(setattr->sa_bmval[1]);
2891 }
2892 ADJUST_ARGS();
2893 return nfserr;
2894 }
2895
2896 static __be32
2897 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2898 {
2899 __be32 *p;
2900
2901 if (!nfserr) {
2902 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2903 WRITEMEM(&scd->se_clientid, 8);
2904 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2905 ADJUST_ARGS();
2906 }
2907 else if (nfserr == nfserr_clid_inuse) {
2908 RESERVE_SPACE(8);
2909 WRITE32(0);
2910 WRITE32(0);
2911 ADJUST_ARGS();
2912 }
2913 return nfserr;
2914 }
2915
2916 static __be32
2917 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2918 {
2919 __be32 *p;
2920
2921 if (!nfserr) {
2922 RESERVE_SPACE(16);
2923 WRITE32(write->wr_bytes_written);
2924 WRITE32(write->wr_how_written);
2925 WRITEMEM(write->wr_verifier.data, 8);
2926 ADJUST_ARGS();
2927 }
2928 return nfserr;
2929 }
2930
2931 static __be32
2932 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2933 struct nfsd4_exchange_id *exid)
2934 {
2935 __be32 *p;
2936 char *major_id;
2937 char *server_scope;
2938 int major_id_sz;
2939 int server_scope_sz;
2940 uint64_t minor_id = 0;
2941
2942 if (nfserr)
2943 return nfserr;
2944
2945 major_id = utsname()->nodename;
2946 major_id_sz = strlen(major_id);
2947 server_scope = utsname()->nodename;
2948 server_scope_sz = strlen(server_scope);
2949
2950 RESERVE_SPACE(
2951 8 /* eir_clientid */ +
2952 4 /* eir_sequenceid */ +
2953 4 /* eir_flags */ +
2954 4 /* spr_how (SP4_NONE) */ +
2955 8 /* so_minor_id */ +
2956 4 /* so_major_id.len */ +
2957 (XDR_QUADLEN(major_id_sz) * 4) +
2958 4 /* eir_server_scope.len */ +
2959 (XDR_QUADLEN(server_scope_sz) * 4) +
2960 4 /* eir_server_impl_id.count (0) */);
2961
2962 WRITEMEM(&exid->clientid, 8);
2963 WRITE32(exid->seqid);
2964 WRITE32(exid->flags);
2965
2966 /* state_protect4_r. Currently only support SP4_NONE */
2967 BUG_ON(exid->spa_how != SP4_NONE);
2968 WRITE32(exid->spa_how);
2969
2970 /* The server_owner struct */
2971 WRITE64(minor_id); /* Minor id */
2972 /* major id */
2973 WRITE32(major_id_sz);
2974 WRITEMEM(major_id, major_id_sz);
2975
2976 /* Server scope */
2977 WRITE32(server_scope_sz);
2978 WRITEMEM(server_scope, server_scope_sz);
2979
2980 /* Implementation id */
2981 WRITE32(0); /* zero length nfs_impl_id4 array */
2982 ADJUST_ARGS();
2983 return 0;
2984 }
2985
2986 static __be32
2987 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2988 struct nfsd4_create_session *sess)
2989 {
2990 __be32 *p;
2991
2992 if (nfserr)
2993 return nfserr;
2994
2995 RESERVE_SPACE(24);
2996 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2997 WRITE32(sess->seqid);
2998 WRITE32(sess->flags);
2999 ADJUST_ARGS();
3000
3001 RESERVE_SPACE(28);
3002 WRITE32(0); /* headerpadsz */
3003 WRITE32(sess->fore_channel.maxreq_sz);
3004 WRITE32(sess->fore_channel.maxresp_sz);
3005 WRITE32(sess->fore_channel.maxresp_cached);
3006 WRITE32(sess->fore_channel.maxops);
3007 WRITE32(sess->fore_channel.maxreqs);
3008 WRITE32(sess->fore_channel.nr_rdma_attrs);
3009 ADJUST_ARGS();
3010
3011 if (sess->fore_channel.nr_rdma_attrs) {
3012 RESERVE_SPACE(4);
3013 WRITE32(sess->fore_channel.rdma_attrs);
3014 ADJUST_ARGS();
3015 }
3016
3017 RESERVE_SPACE(28);
3018 WRITE32(0); /* headerpadsz */
3019 WRITE32(sess->back_channel.maxreq_sz);
3020 WRITE32(sess->back_channel.maxresp_sz);
3021 WRITE32(sess->back_channel.maxresp_cached);
3022 WRITE32(sess->back_channel.maxops);
3023 WRITE32(sess->back_channel.maxreqs);
3024 WRITE32(sess->back_channel.nr_rdma_attrs);
3025 ADJUST_ARGS();
3026
3027 if (sess->back_channel.nr_rdma_attrs) {
3028 RESERVE_SPACE(4);
3029 WRITE32(sess->back_channel.rdma_attrs);
3030 ADJUST_ARGS();
3031 }
3032 return 0;
3033 }
3034
3035 static __be32
3036 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3037 struct nfsd4_destroy_session *destroy_session)
3038 {
3039 return nfserr;
3040 }
3041
3042 __be32
3043 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3044 struct nfsd4_sequence *seq)
3045 {
3046 __be32 *p;
3047
3048 if (nfserr)
3049 return nfserr;
3050
3051 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3052 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3053 WRITE32(seq->seqid);
3054 WRITE32(seq->slotid);
3055 WRITE32(seq->maxslots);
3056 /*
3057 * FIXME: for now:
3058 * target_maxslots = maxslots
3059 * status_flags = 0
3060 */
3061 WRITE32(seq->maxslots);
3062 WRITE32(0);
3063
3064 ADJUST_ARGS();
3065 resp->cstate.datap = p; /* DRC cache data pointer */
3066 return 0;
3067 }
3068
3069 static __be32
3070 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3071 {
3072 return nfserr;
3073 }
3074
3075 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3076
3077 /*
3078 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3079 * since we don't need to filter out obsolete ops as this is
3080 * done in the decoding phase.
3081 */
3082 static nfsd4_enc nfsd4_enc_ops[] = {
3083 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3084 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3085 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3086 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3087 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3088 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3089 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3090 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3091 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3092 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3093 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3094 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3095 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3097 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3098 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3099 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3100 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3101 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3102 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3103 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3104 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3105 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3106 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3107 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3108 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3109 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3110 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3111 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3112 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3113 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3114 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3115 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3116 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3117 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3118 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3119 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3120
3121 /* NFSv4.1 operations */
3122 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3123 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3125 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3126 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3127 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3132 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3133 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3135 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3136 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3137 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3138 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3139 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3140 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3141 };
3142
3143 /*
3144 * Calculate the total amount of memory that the compound response has taken
3145 * after encoding the current operation.
3146 *
3147 * pad: add on 8 bytes for the next operation's op_code and status so that
3148 * there is room to cache a failure on the next operation.
3149 *
3150 * Compare this length to the session se_fmaxresp_cached.
3151 *
3152 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3153 * will be at least a page and will therefore hold the xdr_buf head.
3154 */
3155 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3156 {
3157 int status = 0;
3158 struct xdr_buf *xb = &resp->rqstp->rq_res;
3159 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3160 struct nfsd4_session *session = NULL;
3161 struct nfsd4_slot *slot = resp->cstate.slot;
3162 u32 length, tlen = 0, pad = 8;
3163
3164 if (!nfsd4_has_session(&resp->cstate))
3165 return status;
3166
3167 session = resp->cstate.session;
3168 if (session == NULL || slot->sl_cachethis == 0)
3169 return status;
3170
3171 if (resp->opcnt >= args->opcnt)
3172 pad = 0; /* this is the last operation */
3173
3174 if (xb->page_len == 0) {
3175 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3176 } else {
3177 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3178 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3179
3180 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3181 }
3182 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3183 length, xb->page_len, tlen, pad);
3184
3185 if (length <= session->se_fchannel.maxresp_cached)
3186 return status;
3187 else
3188 return nfserr_rep_too_big_to_cache;
3189 }
3190
3191 void
3192 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3193 {
3194 __be32 *statp;
3195 __be32 *p;
3196
3197 RESERVE_SPACE(8);
3198 WRITE32(op->opnum);
3199 statp = p++; /* to be backfilled at the end */
3200 ADJUST_ARGS();
3201
3202 if (op->opnum == OP_ILLEGAL)
3203 goto status;
3204 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3205 !nfsd4_enc_ops[op->opnum]);
3206 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3207 /* nfsd4_check_drc_limit guarantees enough room for error status */
3208 if (!op->status && nfsd4_check_drc_limit(resp))
3209 op->status = nfserr_rep_too_big_to_cache;
3210 status:
3211 /*
3212 * Note: We write the status directly, instead of using WRITE32(),
3213 * since it is already in network byte order.
3214 */
3215 *statp = op->status;
3216 }
3217
3218 /*
3219 * Encode the reply stored in the stateowner reply cache
3220 *
3221 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3222 * previously sent already encoded operation.
3223 *
3224 * called with nfs4_lock_state() held
3225 */
3226 void
3227 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3228 {
3229 __be32 *p;
3230 struct nfs4_replay *rp = op->replay;
3231
3232 BUG_ON(!rp);
3233
3234 RESERVE_SPACE(8);
3235 WRITE32(op->opnum);
3236 *p++ = rp->rp_status; /* already xdr'ed */
3237 ADJUST_ARGS();
3238
3239 RESERVE_SPACE(rp->rp_buflen);
3240 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3241 ADJUST_ARGS();
3242 }
3243
3244 int
3245 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3246 {
3247 return xdr_ressize_check(rqstp, p);
3248 }
3249
3250 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3251 {
3252 if (args->ops != args->iops) {
3253 kfree(args->ops);
3254 args->ops = args->iops;
3255 }
3256 kfree(args->tmpp);
3257 args->tmpp = NULL;
3258 while (args->to_free) {
3259 struct tmpbuf *tb = args->to_free;
3260 args->to_free = tb->next;
3261 tb->release(tb->buf);
3262 kfree(tb);
3263 }
3264 }
3265
3266 int
3267 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3268 {
3269 __be32 status;
3270
3271 args->p = p;
3272 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3273 args->pagelist = rqstp->rq_arg.pages;
3274 args->pagelen = rqstp->rq_arg.page_len;
3275 args->tmpp = NULL;
3276 args->to_free = NULL;
3277 args->ops = args->iops;
3278 args->rqstp = rqstp;
3279
3280 status = nfsd4_decode_compound(args);
3281 if (status) {
3282 nfsd4_release_compoundargs(args);
3283 }
3284 return !status;
3285 }
3286
3287 int
3288 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3289 {
3290 /*
3291 * All that remains is to write the tag and operation count...
3292 */
3293 struct nfsd4_compound_state *cs = &resp->cstate;
3294 struct kvec *iov;
3295 p = resp->tagp;
3296 *p++ = htonl(resp->taglen);
3297 memcpy(p, resp->tag, resp->taglen);
3298 p += XDR_QUADLEN(resp->taglen);
3299 *p++ = htonl(resp->opcnt);
3300
3301 if (rqstp->rq_res.page_len)
3302 iov = &rqstp->rq_res.tail[0];
3303 else
3304 iov = &rqstp->rq_res.head[0];
3305 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3306 BUG_ON(iov->iov_len > PAGE_SIZE);
3307 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
3308 nfsd4_store_cache_entry(resp);
3309 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3310 resp->cstate.slot->sl_inuse = false;
3311 nfsd4_put_session(resp->cstate.session);
3312 }
3313 return 1;
3314 }
3315
3316 /*
3317 * Local variables:
3318 * c-basic-offset: 8
3319 * End:
3320 */
mm of the moment repository