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nfsd: open-code special directory-hardlink check
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
49
50 #include "idmap.h"
51 #include "acl.h"
52 #include "xdr4.h"
53 #include "vfs.h"
54 #include "state.h"
55 #include "cache.h"
56
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
58
59 /*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
67 static __be32
68 check_filename(char *str, int len, __be32 err)
69 {
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80 }
81
82 #define DECODE_HEAD \
83 __be32 *p; \
84 __be32 status
85 #define DECODE_TAIL \
86 status = 0; \
87 out: \
88 return status; \
89 xdr_error: \
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
93 goto out
94
95 #define READ32(x) (x) = ntohl(*p++)
96 #define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99 } while (0)
100 #define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104 } while (0)
105 #define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108 } while (0)
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118 } while (0)
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
132 goto xdr_error; \
133 } \
134 } while (0)
135
136 static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137 {
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142 }
143
144 static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145 {
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150 }
151
152 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
153 {
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
157 unsigned int avail = (char *)argp->end - (char *)argp->p;
158 __be32 *p;
159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
167 kfree(argp->tmpp);
168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
183 argp->end = argp->p + (argp->pagelen>>2);
184 argp->pagelen = 0;
185 } else {
186 argp->end = argp->p + (PAGE_SIZE>>2);
187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192 }
193
194 static int zero_clientid(clientid_t *clid)
195 {
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197 }
198
199 static int
200 defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202 {
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213 }
214
215 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
216 {
217 if (p == argp->tmp) {
218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
221 memcpy(p, argp->tmp, nbytes);
222 } else {
223 BUG_ON(p != argp->tmpp);
224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
227 kfree(p);
228 return NULL;
229 } else
230 return (char *)p;
231 }
232
233 static __be32
234 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235 {
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
241 bmval[2] = 0;
242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
253 if (bmlen > 2)
254 READ32(bmval[2]);
255
256 DECODE_TAIL;
257 }
258
259 static __be32
260 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
261 struct iattr *iattr, struct nfs4_acl **acl)
262 {
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
266 int host_err;
267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
283 int nace;
284 struct nfs4_ace *ace;
285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
293 if (*acl == NULL) {
294 host_err = -ENOMEM;
295 goto out_nfserr;
296 }
297 defer_free(argp, kfree, *acl);
298
299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
301 READ_BUF(16); len += 16;
302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 status = nfs_ok;
311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
314 status = nfsd_map_name_to_gid(argp->rqstp,
315 buf, dummy32, &ace->who);
316 else
317 status = nfsd_map_name_to_uid(argp->rqstp,
318 buf, dummy32, &ace->who);
319 if (status)
320 return status;
321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
410 goto xdr_error;
411
412 DECODE_TAIL;
413
414 out_nfserr:
415 status = nfserrno(host_err);
416 goto out;
417 }
418
419 static __be32
420 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421 {
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429 }
430
431 static __be32
432 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433 {
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440 }
441
442 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443 {
444 DECODE_HEAD;
445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
451 DECODE_TAIL;
452 }
453
454 static __be32
455 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456 {
457 DECODE_HEAD;
458
459 close->cl_stateowner = NULL;
460 READ_BUF(4);
461 READ32(close->cl_seqid);
462 return nfsd4_decode_stateid(argp, &close->cl_stateid);
463
464 DECODE_TAIL;
465 }
466
467
468 static __be32
469 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
470 {
471 DECODE_HEAD;
472
473 READ_BUF(12);
474 READ64(commit->co_offset);
475 READ32(commit->co_count);
476
477 DECODE_TAIL;
478 }
479
480 static __be32
481 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
482 {
483 DECODE_HEAD;
484
485 READ_BUF(4);
486 READ32(create->cr_type);
487 switch (create->cr_type) {
488 case NF4LNK:
489 READ_BUF(4);
490 READ32(create->cr_linklen);
491 READ_BUF(create->cr_linklen);
492 SAVEMEM(create->cr_linkname, create->cr_linklen);
493 break;
494 case NF4BLK:
495 case NF4CHR:
496 READ_BUF(8);
497 READ32(create->cr_specdata1);
498 READ32(create->cr_specdata2);
499 break;
500 case NF4SOCK:
501 case NF4FIFO:
502 case NF4DIR:
503 default:
504 break;
505 }
506
507 READ_BUF(4);
508 READ32(create->cr_namelen);
509 READ_BUF(create->cr_namelen);
510 SAVEMEM(create->cr_name, create->cr_namelen);
511 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
512 return status;
513
514 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
515 &create->cr_acl);
516 if (status)
517 goto out;
518
519 DECODE_TAIL;
520 }
521
522 static inline __be32
523 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
524 {
525 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
526 }
527
528 static inline __be32
529 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
530 {
531 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
532 }
533
534 static __be32
535 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
536 {
537 DECODE_HEAD;
538
539 READ_BUF(4);
540 READ32(link->li_namelen);
541 READ_BUF(link->li_namelen);
542 SAVEMEM(link->li_name, link->li_namelen);
543 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
544 return status;
545
546 DECODE_TAIL;
547 }
548
549 static __be32
550 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
551 {
552 DECODE_HEAD;
553
554 lock->lk_replay_owner = NULL;
555 /*
556 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
557 */
558 READ_BUF(28);
559 READ32(lock->lk_type);
560 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
561 goto xdr_error;
562 READ32(lock->lk_reclaim);
563 READ64(lock->lk_offset);
564 READ64(lock->lk_length);
565 READ32(lock->lk_is_new);
566
567 if (lock->lk_is_new) {
568 READ_BUF(4);
569 READ32(lock->lk_new_open_seqid);
570 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
571 if (status)
572 return status;
573 READ_BUF(8 + sizeof(clientid_t));
574 READ32(lock->lk_new_lock_seqid);
575 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
576 READ32(lock->lk_new_owner.len);
577 READ_BUF(lock->lk_new_owner.len);
578 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
579 } else {
580 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
581 if (status)
582 return status;
583 READ_BUF(4);
584 READ32(lock->lk_old_lock_seqid);
585 }
586
587 DECODE_TAIL;
588 }
589
590 static __be32
591 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
592 {
593 DECODE_HEAD;
594
595 READ_BUF(32);
596 READ32(lockt->lt_type);
597 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
598 goto xdr_error;
599 READ64(lockt->lt_offset);
600 READ64(lockt->lt_length);
601 COPYMEM(&lockt->lt_clientid, 8);
602 READ32(lockt->lt_owner.len);
603 READ_BUF(lockt->lt_owner.len);
604 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
605
606 DECODE_TAIL;
607 }
608
609 static __be32
610 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
611 {
612 DECODE_HEAD;
613
614 locku->lu_stateowner = NULL;
615 READ_BUF(8);
616 READ32(locku->lu_type);
617 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
618 goto xdr_error;
619 READ32(locku->lu_seqid);
620 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
621 if (status)
622 return status;
623 READ_BUF(16);
624 READ64(locku->lu_offset);
625 READ64(locku->lu_length);
626
627 DECODE_TAIL;
628 }
629
630 static __be32
631 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
632 {
633 DECODE_HEAD;
634
635 READ_BUF(4);
636 READ32(lookup->lo_len);
637 READ_BUF(lookup->lo_len);
638 SAVEMEM(lookup->lo_name, lookup->lo_len);
639 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
640 return status;
641
642 DECODE_TAIL;
643 }
644
645 static __be32
646 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
647 {
648 DECODE_HEAD;
649
650 memset(open->op_bmval, 0, sizeof(open->op_bmval));
651 open->op_iattr.ia_valid = 0;
652 open->op_stateowner = NULL;
653
654 /* seqid, share_access, share_deny, clientid, ownerlen */
655 READ_BUF(16 + sizeof(clientid_t));
656 READ32(open->op_seqid);
657 READ32(open->op_share_access);
658 READ32(open->op_share_deny);
659 COPYMEM(&open->op_clientid, sizeof(clientid_t));
660 READ32(open->op_owner.len);
661
662 /* owner, open_flag */
663 READ_BUF(open->op_owner.len + 4);
664 SAVEMEM(open->op_owner.data, open->op_owner.len);
665 READ32(open->op_create);
666 switch (open->op_create) {
667 case NFS4_OPEN_NOCREATE:
668 break;
669 case NFS4_OPEN_CREATE:
670 READ_BUF(4);
671 READ32(open->op_createmode);
672 switch (open->op_createmode) {
673 case NFS4_CREATE_UNCHECKED:
674 case NFS4_CREATE_GUARDED:
675 status = nfsd4_decode_fattr(argp, open->op_bmval,
676 &open->op_iattr, &open->op_acl);
677 if (status)
678 goto out;
679 break;
680 case NFS4_CREATE_EXCLUSIVE:
681 READ_BUF(8);
682 COPYMEM(open->op_verf.data, 8);
683 break;
684 case NFS4_CREATE_EXCLUSIVE4_1:
685 if (argp->minorversion < 1)
686 goto xdr_error;
687 READ_BUF(8);
688 COPYMEM(open->op_verf.data, 8);
689 status = nfsd4_decode_fattr(argp, open->op_bmval,
690 &open->op_iattr, &open->op_acl);
691 if (status)
692 goto out;
693 break;
694 default:
695 goto xdr_error;
696 }
697 break;
698 default:
699 goto xdr_error;
700 }
701
702 /* open_claim */
703 READ_BUF(4);
704 READ32(open->op_claim_type);
705 switch (open->op_claim_type) {
706 case NFS4_OPEN_CLAIM_NULL:
707 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
708 READ_BUF(4);
709 READ32(open->op_fname.len);
710 READ_BUF(open->op_fname.len);
711 SAVEMEM(open->op_fname.data, open->op_fname.len);
712 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
713 return status;
714 break;
715 case NFS4_OPEN_CLAIM_PREVIOUS:
716 READ_BUF(4);
717 READ32(open->op_delegate_type);
718 break;
719 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
720 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
721 if (status)
722 return status;
723 READ_BUF(4);
724 READ32(open->op_fname.len);
725 READ_BUF(open->op_fname.len);
726 SAVEMEM(open->op_fname.data, open->op_fname.len);
727 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
728 return status;
729 break;
730 default:
731 goto xdr_error;
732 }
733
734 DECODE_TAIL;
735 }
736
737 static __be32
738 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
739 {
740 DECODE_HEAD;
741
742 open_conf->oc_stateowner = NULL;
743 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
747 READ32(open_conf->oc_seqid);
748
749 DECODE_TAIL;
750 }
751
752 static __be32
753 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
754 {
755 DECODE_HEAD;
756
757 open_down->od_stateowner = NULL;
758 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
762 READ32(open_down->od_seqid);
763 READ32(open_down->od_share_access);
764 READ32(open_down->od_share_deny);
765
766 DECODE_TAIL;
767 }
768
769 static __be32
770 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
771 {
772 DECODE_HEAD;
773
774 READ_BUF(4);
775 READ32(putfh->pf_fhlen);
776 if (putfh->pf_fhlen > NFS4_FHSIZE)
777 goto xdr_error;
778 READ_BUF(putfh->pf_fhlen);
779 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
780
781 DECODE_TAIL;
782 }
783
784 static __be32
785 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
786 {
787 DECODE_HEAD;
788
789 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
790 if (status)
791 return status;
792 READ_BUF(12);
793 READ64(read->rd_offset);
794 READ32(read->rd_length);
795
796 DECODE_TAIL;
797 }
798
799 static __be32
800 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
801 {
802 DECODE_HEAD;
803
804 READ_BUF(24);
805 READ64(readdir->rd_cookie);
806 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
807 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
808 READ32(readdir->rd_maxcount);
809 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
810 goto out;
811
812 DECODE_TAIL;
813 }
814
815 static __be32
816 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
817 {
818 DECODE_HEAD;
819
820 READ_BUF(4);
821 READ32(remove->rm_namelen);
822 READ_BUF(remove->rm_namelen);
823 SAVEMEM(remove->rm_name, remove->rm_namelen);
824 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
825 return status;
826
827 DECODE_TAIL;
828 }
829
830 static __be32
831 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
832 {
833 DECODE_HEAD;
834
835 READ_BUF(4);
836 READ32(rename->rn_snamelen);
837 READ_BUF(rename->rn_snamelen + 4);
838 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
839 READ32(rename->rn_tnamelen);
840 READ_BUF(rename->rn_tnamelen);
841 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
842 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
843 return status;
844 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
845 return status;
846
847 DECODE_TAIL;
848 }
849
850 static __be32
851 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
852 {
853 DECODE_HEAD;
854
855 READ_BUF(sizeof(clientid_t));
856 COPYMEM(clientid, sizeof(clientid_t));
857
858 DECODE_TAIL;
859 }
860
861 static __be32
862 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
863 struct nfsd4_secinfo *secinfo)
864 {
865 DECODE_HEAD;
866
867 READ_BUF(4);
868 READ32(secinfo->si_namelen);
869 READ_BUF(secinfo->si_namelen);
870 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
871 status = check_filename(secinfo->si_name, secinfo->si_namelen,
872 nfserr_noent);
873 if (status)
874 return status;
875 DECODE_TAIL;
876 }
877
878 static __be32
879 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
880 struct nfsd4_secinfo_no_name *sin)
881 {
882 DECODE_HEAD;
883
884 READ_BUF(4);
885 READ32(sin->sin_style);
886 DECODE_TAIL;
887 }
888
889 static __be32
890 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
891 {
892 __be32 status;
893
894 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
895 if (status)
896 return status;
897 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
898 &setattr->sa_acl);
899 }
900
901 static __be32
902 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
903 {
904 DECODE_HEAD;
905
906 READ_BUF(12);
907 COPYMEM(setclientid->se_verf.data, 8);
908 READ32(setclientid->se_namelen);
909
910 READ_BUF(setclientid->se_namelen + 8);
911 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
912 READ32(setclientid->se_callback_prog);
913 READ32(setclientid->se_callback_netid_len);
914
915 READ_BUF(setclientid->se_callback_netid_len + 4);
916 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
917 READ32(setclientid->se_callback_addr_len);
918
919 READ_BUF(setclientid->se_callback_addr_len + 4);
920 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
921 READ32(setclientid->se_callback_ident);
922
923 DECODE_TAIL;
924 }
925
926 static __be32
927 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
928 {
929 DECODE_HEAD;
930
931 READ_BUF(8 + sizeof(nfs4_verifier));
932 COPYMEM(&scd_c->sc_clientid, 8);
933 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
934
935 DECODE_TAIL;
936 }
937
938 /* Also used for NVERIFY */
939 static __be32
940 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
941 {
942 #if 0
943 struct nfsd4_compoundargs save = {
944 .p = argp->p,
945 .end = argp->end,
946 .rqstp = argp->rqstp,
947 };
948 u32 ve_bmval[2];
949 struct iattr ve_iattr; /* request */
950 struct nfs4_acl *ve_acl; /* request */
951 #endif
952 DECODE_HEAD;
953
954 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
955 goto out;
956
957 /* For convenience's sake, we compare raw xdr'd attributes in
958 * nfsd4_proc_verify; however we still decode here just to return
959 * correct error in case of bad xdr. */
960 #if 0
961 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
962 if (status == nfserr_inval) {
963 status = nfserrno(status);
964 goto out;
965 }
966 #endif
967 READ_BUF(4);
968 READ32(verify->ve_attrlen);
969 READ_BUF(verify->ve_attrlen);
970 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
971
972 DECODE_TAIL;
973 }
974
975 static __be32
976 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
977 {
978 int avail;
979 int v;
980 int len;
981 DECODE_HEAD;
982
983 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
984 if (status)
985 return status;
986 READ_BUF(16);
987 READ64(write->wr_offset);
988 READ32(write->wr_stable_how);
989 if (write->wr_stable_how > 2)
990 goto xdr_error;
991 READ32(write->wr_buflen);
992
993 /* Sorry .. no magic macros for this.. *
994 * READ_BUF(write->wr_buflen);
995 * SAVEMEM(write->wr_buf, write->wr_buflen);
996 */
997 avail = (char*)argp->end - (char*)argp->p;
998 if (avail + argp->pagelen < write->wr_buflen) {
999 dprintk("NFSD: xdr error (%s:%d)\n",
1000 __FILE__, __LINE__);
1001 goto xdr_error;
1002 }
1003 argp->rqstp->rq_vec[0].iov_base = p;
1004 argp->rqstp->rq_vec[0].iov_len = avail;
1005 v = 0;
1006 len = write->wr_buflen;
1007 while (len > argp->rqstp->rq_vec[v].iov_len) {
1008 len -= argp->rqstp->rq_vec[v].iov_len;
1009 v++;
1010 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1011 argp->pagelist++;
1012 if (argp->pagelen >= PAGE_SIZE) {
1013 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1014 argp->pagelen -= PAGE_SIZE;
1015 } else {
1016 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1017 argp->pagelen -= len;
1018 }
1019 }
1020 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1021 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1022 argp->rqstp->rq_vec[v].iov_len = len;
1023 write->wr_vlen = v+1;
1024
1025 DECODE_TAIL;
1026 }
1027
1028 static __be32
1029 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1030 {
1031 DECODE_HEAD;
1032
1033 READ_BUF(12);
1034 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1035 READ32(rlockowner->rl_owner.len);
1036 READ_BUF(rlockowner->rl_owner.len);
1037 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1038
1039 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1040 return nfserr_inval;
1041 DECODE_TAIL;
1042 }
1043
1044 static __be32
1045 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1046 struct nfsd4_exchange_id *exid)
1047 {
1048 int dummy, tmp;
1049 DECODE_HEAD;
1050
1051 READ_BUF(NFS4_VERIFIER_SIZE);
1052 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1053
1054 READ_BUF(4);
1055 READ32(exid->clname.len);
1056
1057 READ_BUF(exid->clname.len);
1058 SAVEMEM(exid->clname.data, exid->clname.len);
1059
1060 READ_BUF(4);
1061 READ32(exid->flags);
1062
1063 /* Ignore state_protect4_a */
1064 READ_BUF(4);
1065 READ32(exid->spa_how);
1066 switch (exid->spa_how) {
1067 case SP4_NONE:
1068 break;
1069 case SP4_MACH_CRED:
1070 /* spo_must_enforce */
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 /* spo_must_allow */
1077 READ_BUF(4);
1078 READ32(dummy);
1079 READ_BUF(dummy * 4);
1080 p += dummy;
1081 break;
1082 case SP4_SSV:
1083 /* ssp_ops */
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy * 4);
1087 p += dummy;
1088
1089 READ_BUF(4);
1090 READ32(dummy);
1091 READ_BUF(dummy * 4);
1092 p += dummy;
1093
1094 /* ssp_hash_algs<> */
1095 READ_BUF(4);
1096 READ32(tmp);
1097 while (tmp--) {
1098 READ_BUF(4);
1099 READ32(dummy);
1100 READ_BUF(dummy);
1101 p += XDR_QUADLEN(dummy);
1102 }
1103
1104 /* ssp_encr_algs<> */
1105 READ_BUF(4);
1106 READ32(tmp);
1107 while (tmp--) {
1108 READ_BUF(4);
1109 READ32(dummy);
1110 READ_BUF(dummy);
1111 p += XDR_QUADLEN(dummy);
1112 }
1113
1114 /* ssp_window and ssp_num_gss_handles */
1115 READ_BUF(8);
1116 READ32(dummy);
1117 READ32(dummy);
1118 break;
1119 default:
1120 goto xdr_error;
1121 }
1122
1123 /* Ignore Implementation ID */
1124 READ_BUF(4); /* nfs_impl_id4 array length */
1125 READ32(dummy);
1126
1127 if (dummy > 1)
1128 goto xdr_error;
1129
1130 if (dummy == 1) {
1131 /* nii_domain */
1132 READ_BUF(4);
1133 READ32(dummy);
1134 READ_BUF(dummy);
1135 p += XDR_QUADLEN(dummy);
1136
1137 /* nii_name */
1138 READ_BUF(4);
1139 READ32(dummy);
1140 READ_BUF(dummy);
1141 p += XDR_QUADLEN(dummy);
1142
1143 /* nii_date */
1144 READ_BUF(12);
1145 p += 3;
1146 }
1147 DECODE_TAIL;
1148 }
1149
1150 static __be32
1151 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1152 struct nfsd4_create_session *sess)
1153 {
1154 DECODE_HEAD;
1155
1156 u32 dummy;
1157 char *machine_name;
1158 int i;
1159 int nr_secflavs;
1160
1161 READ_BUF(16);
1162 COPYMEM(&sess->clientid, 8);
1163 READ32(sess->seqid);
1164 READ32(sess->flags);
1165
1166 /* Fore channel attrs */
1167 READ_BUF(28);
1168 READ32(dummy); /* headerpadsz is always 0 */
1169 READ32(sess->fore_channel.maxreq_sz);
1170 READ32(sess->fore_channel.maxresp_sz);
1171 READ32(sess->fore_channel.maxresp_cached);
1172 READ32(sess->fore_channel.maxops);
1173 READ32(sess->fore_channel.maxreqs);
1174 READ32(sess->fore_channel.nr_rdma_attrs);
1175 if (sess->fore_channel.nr_rdma_attrs == 1) {
1176 READ_BUF(4);
1177 READ32(sess->fore_channel.rdma_attrs);
1178 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1179 dprintk("Too many fore channel attr bitmaps!\n");
1180 goto xdr_error;
1181 }
1182
1183 /* Back channel attrs */
1184 READ_BUF(28);
1185 READ32(dummy); /* headerpadsz is always 0 */
1186 READ32(sess->back_channel.maxreq_sz);
1187 READ32(sess->back_channel.maxresp_sz);
1188 READ32(sess->back_channel.maxresp_cached);
1189 READ32(sess->back_channel.maxops);
1190 READ32(sess->back_channel.maxreqs);
1191 READ32(sess->back_channel.nr_rdma_attrs);
1192 if (sess->back_channel.nr_rdma_attrs == 1) {
1193 READ_BUF(4);
1194 READ32(sess->back_channel.rdma_attrs);
1195 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1196 dprintk("Too many back channel attr bitmaps!\n");
1197 goto xdr_error;
1198 }
1199
1200 READ_BUF(8);
1201 READ32(sess->callback_prog);
1202
1203 /* callback_sec_params4 */
1204 READ32(nr_secflavs);
1205 for (i = 0; i < nr_secflavs; ++i) {
1206 READ_BUF(4);
1207 READ32(dummy);
1208 switch (dummy) {
1209 case RPC_AUTH_NULL:
1210 /* Nothing to read */
1211 break;
1212 case RPC_AUTH_UNIX:
1213 READ_BUF(8);
1214 /* stamp */
1215 READ32(dummy);
1216
1217 /* machine name */
1218 READ32(dummy);
1219 READ_BUF(dummy);
1220 SAVEMEM(machine_name, dummy);
1221
1222 /* uid, gid */
1223 READ_BUF(8);
1224 READ32(sess->uid);
1225 READ32(sess->gid);
1226
1227 /* more gids */
1228 READ_BUF(4);
1229 READ32(dummy);
1230 READ_BUF(dummy * 4);
1231 break;
1232 case RPC_AUTH_GSS:
1233 dprintk("RPC_AUTH_GSS callback secflavor "
1234 "not supported!\n");
1235 READ_BUF(8);
1236 /* gcbp_service */
1237 READ32(dummy);
1238 /* gcbp_handle_from_server */
1239 READ32(dummy);
1240 READ_BUF(dummy);
1241 p += XDR_QUADLEN(dummy);
1242 /* gcbp_handle_from_client */
1243 READ_BUF(4);
1244 READ32(dummy);
1245 READ_BUF(dummy);
1246 break;
1247 default:
1248 dprintk("Illegal callback secflavor\n");
1249 return nfserr_inval;
1250 }
1251 }
1252 DECODE_TAIL;
1253 }
1254
1255 static __be32
1256 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1257 struct nfsd4_destroy_session *destroy_session)
1258 {
1259 DECODE_HEAD;
1260 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1261 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1262
1263 DECODE_TAIL;
1264 }
1265
1266 static __be32
1267 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1268 struct nfsd4_free_stateid *free_stateid)
1269 {
1270 DECODE_HEAD;
1271
1272 READ_BUF(sizeof(stateid_t));
1273 READ32(free_stateid->fr_stateid.si_generation);
1274 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1275
1276 DECODE_TAIL;
1277 }
1278
1279 static __be32
1280 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1281 struct nfsd4_sequence *seq)
1282 {
1283 DECODE_HEAD;
1284
1285 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1286 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1287 READ32(seq->seqid);
1288 READ32(seq->slotid);
1289 READ32(seq->maxslots);
1290 READ32(seq->cachethis);
1291
1292 DECODE_TAIL;
1293 }
1294
1295 static __be32
1296 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1297 {
1298 unsigned int nbytes;
1299 stateid_t si;
1300 int i;
1301 __be32 *p;
1302 __be32 status;
1303
1304 READ_BUF(4);
1305 test_stateid->ts_num_ids = ntohl(*p++);
1306
1307 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1308 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1309 goto xdr_error;
1310
1311 test_stateid->ts_saved_args = argp;
1312 save_buf(argp, &test_stateid->ts_savedp);
1313
1314 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1315 status = nfsd4_decode_stateid(argp, &si);
1316 if (status)
1317 return status;
1318 }
1319
1320 status = 0;
1321 out:
1322 return status;
1323 xdr_error:
1324 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1325 status = nfserr_bad_xdr;
1326 goto out;
1327 }
1328
1329 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1330 {
1331 DECODE_HEAD;
1332
1333 READ_BUF(4);
1334 READ32(rc->rca_one_fs);
1335
1336 DECODE_TAIL;
1337 }
1338
1339 static __be32
1340 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1341 {
1342 return nfs_ok;
1343 }
1344
1345 static __be32
1346 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1347 {
1348 return nfserr_notsupp;
1349 }
1350
1351 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1352
1353 static nfsd4_dec nfsd4_dec_ops[] = {
1354 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1355 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1356 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1357 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1358 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1360 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1361 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1362 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1363 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1364 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1365 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1366 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1367 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1368 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1369 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1370 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1372 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1373 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1374 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1375 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1376 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1377 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1378 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1379 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1380 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1381 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1382 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1383 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1384 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1385 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1386 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1387 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1388 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1389 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1390 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1391 };
1392
1393 static nfsd4_dec nfsd41_dec_ops[] = {
1394 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1395 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1396 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1397 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1398 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1399 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1400 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1401 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1402 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1403 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1404 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1405 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1406 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1407 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1408 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1409 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1410 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1411 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1412 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1413 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1414 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1415 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1416 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1417 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1418 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1419 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1420 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1421 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1422 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1423 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1424 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1425 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1426 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1427 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1428 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1429 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1430 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1431
1432 /* new operations for NFSv4.1 */
1433 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1434 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1435 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1436 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1437 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1438 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1439 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1440 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1441 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1442 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1443 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1444 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1445 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1446 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1447 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1448 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1449 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1450 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1451 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1452 };
1453
1454 struct nfsd4_minorversion_ops {
1455 nfsd4_dec *decoders;
1456 int nops;
1457 };
1458
1459 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1460 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1461 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1462 };
1463
1464 static __be32
1465 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1466 {
1467 DECODE_HEAD;
1468 struct nfsd4_op *op;
1469 struct nfsd4_minorversion_ops *ops;
1470 bool cachethis = false;
1471 int i;
1472
1473 /*
1474 * XXX: According to spec, we should check the tag
1475 * for UTF-8 compliance. I'm postponing this for
1476 * now because it seems that some clients do use
1477 * binary tags.
1478 */
1479 READ_BUF(4);
1480 READ32(argp->taglen);
1481 READ_BUF(argp->taglen + 8);
1482 SAVEMEM(argp->tag, argp->taglen);
1483 READ32(argp->minorversion);
1484 READ32(argp->opcnt);
1485
1486 if (argp->taglen > NFSD4_MAX_TAGLEN)
1487 goto xdr_error;
1488 if (argp->opcnt > 100)
1489 goto xdr_error;
1490
1491 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1492 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1493 if (!argp->ops) {
1494 argp->ops = argp->iops;
1495 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1496 goto xdr_error;
1497 }
1498 }
1499
1500 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1501 argp->opcnt = 0;
1502
1503 ops = &nfsd4_minorversion[argp->minorversion];
1504 for (i = 0; i < argp->opcnt; i++) {
1505 op = &argp->ops[i];
1506 op->replay = NULL;
1507
1508 /*
1509 * We can't use READ_BUF() here because we need to handle
1510 * a missing opcode as an OP_WRITE + 1. So we need to check
1511 * to see if we're truly at the end of our buffer or if there
1512 * is another page we need to flip to.
1513 */
1514
1515 if (argp->p == argp->end) {
1516 if (argp->pagelen < 4) {
1517 /* There isn't an opcode still on the wire */
1518 op->opnum = OP_WRITE + 1;
1519 op->status = nfserr_bad_xdr;
1520 argp->opcnt = i+1;
1521 break;
1522 }
1523
1524 /*
1525 * False alarm. We just hit a page boundary, but there
1526 * is still data available. Move pointer across page
1527 * boundary. *snip from READ_BUF*
1528 */
1529 argp->p = page_address(argp->pagelist[0]);
1530 argp->pagelist++;
1531 if (argp->pagelen < PAGE_SIZE) {
1532 argp->end = argp->p + (argp->pagelen>>2);
1533 argp->pagelen = 0;
1534 } else {
1535 argp->end = argp->p + (PAGE_SIZE>>2);
1536 argp->pagelen -= PAGE_SIZE;
1537 }
1538 }
1539 op->opnum = ntohl(*argp->p++);
1540
1541 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1542 op->status = ops->decoders[op->opnum](argp, &op->u);
1543 else {
1544 op->opnum = OP_ILLEGAL;
1545 op->status = nfserr_op_illegal;
1546 }
1547
1548 if (op->status) {
1549 argp->opcnt = i+1;
1550 break;
1551 }
1552 /*
1553 * We'll try to cache the result in the DRC if any one
1554 * op in the compound wants to be cached:
1555 */
1556 cachethis |= nfsd4_cache_this_op(op);
1557 }
1558 /* Sessions make the DRC unnecessary: */
1559 if (argp->minorversion)
1560 cachethis = false;
1561 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1562
1563 DECODE_TAIL;
1564 }
1565
1566 #define WRITE32(n) *p++ = htonl(n)
1567 #define WRITE64(n) do { \
1568 *p++ = htonl((u32)((n) >> 32)); \
1569 *p++ = htonl((u32)(n)); \
1570 } while (0)
1571 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1572 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1573 memcpy(p, ptr, nbytes); \
1574 p += XDR_QUADLEN(nbytes); \
1575 }} while (0)
1576
1577 static void write32(__be32 **p, u32 n)
1578 {
1579 *(*p)++ = n;
1580 }
1581
1582 static void write64(__be32 **p, u64 n)
1583 {
1584 write32(p, (u32)(n >> 32));
1585 write32(p, (u32)n);
1586 }
1587
1588 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1589 {
1590 if (IS_I_VERSION(inode)) {
1591 write64(p, inode->i_version);
1592 } else {
1593 write32(p, stat->ctime.tv_sec);
1594 write32(p, stat->ctime.tv_nsec);
1595 }
1596 }
1597
1598 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1599 {
1600 write32(p, c->atomic);
1601 if (c->change_supported) {
1602 write64(p, c->before_change);
1603 write64(p, c->after_change);
1604 } else {
1605 write32(p, c->before_ctime_sec);
1606 write32(p, c->before_ctime_nsec);
1607 write32(p, c->after_ctime_sec);
1608 write32(p, c->after_ctime_nsec);
1609 }
1610 }
1611
1612 #define RESERVE_SPACE(nbytes) do { \
1613 p = resp->p; \
1614 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1615 } while (0)
1616 #define ADJUST_ARGS() resp->p = p
1617
1618 /*
1619 * Header routine to setup seqid operation replay cache
1620 */
1621 #define ENCODE_SEQID_OP_HEAD \
1622 __be32 *save; \
1623 \
1624 save = resp->p;
1625
1626 static bool seqid_mutating_err(__be32 err)
1627 {
1628 /* rfc 3530 section 8.1.5: */
1629 return err != nfserr_stale_clientid &&
1630 err != nfserr_stale_stateid &&
1631 err != nfserr_bad_stateid &&
1632 err != nfserr_bad_seqid &&
1633 err != nfserr_bad_xdr &&
1634 err != nfserr_resource &&
1635 err != nfserr_nofilehandle;
1636 }
1637
1638 /*
1639 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1640 * is where sequence id's are incremented, and the replay cache is filled.
1641 * Note that we increment sequence id's here, at the last moment, so we're sure
1642 * we know whether the error to be returned is a sequence id mutating error.
1643 */
1644
1645 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1646 if (seqid_mutating_err(nfserr) && stateowner) { \
1647 stateowner->so_seqid++; \
1648 stateowner->so_replay.rp_status = nfserr; \
1649 stateowner->so_replay.rp_buflen = \
1650 (((char *)(resp)->p - (char *)save)); \
1651 memcpy(stateowner->so_replay.rp_buf, save, \
1652 stateowner->so_replay.rp_buflen); \
1653 } } while (0);
1654
1655 /* Encode as an array of strings the string given with components
1656 * separated @sep.
1657 */
1658 static __be32 nfsd4_encode_components(char sep, char *components,
1659 __be32 **pp, int *buflen)
1660 {
1661 __be32 *p = *pp;
1662 __be32 *countp = p;
1663 int strlen, count=0;
1664 char *str, *end;
1665
1666 dprintk("nfsd4_encode_components(%s)\n", components);
1667 if ((*buflen -= 4) < 0)
1668 return nfserr_resource;
1669 WRITE32(0); /* We will fill this in with @count later */
1670 end = str = components;
1671 while (*end) {
1672 for (; *end && (*end != sep); end++)
1673 ; /* Point to end of component */
1674 strlen = end - str;
1675 if (strlen) {
1676 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1677 return nfserr_resource;
1678 WRITE32(strlen);
1679 WRITEMEM(str, strlen);
1680 count++;
1681 }
1682 else
1683 end++;
1684 str = end;
1685 }
1686 *pp = p;
1687 p = countp;
1688 WRITE32(count);
1689 return 0;
1690 }
1691
1692 /*
1693 * encode a location element of a fs_locations structure
1694 */
1695 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1696 __be32 **pp, int *buflen)
1697 {
1698 __be32 status;
1699 __be32 *p = *pp;
1700
1701 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1702 if (status)
1703 return status;
1704 status = nfsd4_encode_components('/', location->path, &p, buflen);
1705 if (status)
1706 return status;
1707 *pp = p;
1708 return 0;
1709 }
1710
1711 /*
1712 * Return the path to an export point in the pseudo filesystem namespace
1713 * Returned string is safe to use as long as the caller holds a reference
1714 * to @exp.
1715 */
1716 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1717 {
1718 struct svc_fh tmp_fh;
1719 char *path = NULL, *rootpath;
1720 size_t rootlen;
1721
1722 fh_init(&tmp_fh, NFS4_FHSIZE);
1723 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1724 if (*stat)
1725 return NULL;
1726 rootpath = tmp_fh.fh_export->ex_pathname;
1727
1728 path = exp->ex_pathname;
1729
1730 rootlen = strlen(rootpath);
1731 if (strncmp(path, rootpath, rootlen)) {
1732 dprintk("nfsd: fs_locations failed;"
1733 "%s is not contained in %s\n", path, rootpath);
1734 *stat = nfserr_notsupp;
1735 path = NULL;
1736 goto out;
1737 }
1738 path += rootlen;
1739 out:
1740 fh_put(&tmp_fh);
1741 return path;
1742 }
1743
1744 /*
1745 * encode a fs_locations structure
1746 */
1747 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1748 struct svc_export *exp,
1749 __be32 **pp, int *buflen)
1750 {
1751 __be32 status;
1752 int i;
1753 __be32 *p = *pp;
1754 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1755 char *root = nfsd4_path(rqstp, exp, &status);
1756
1757 if (status)
1758 return status;
1759 status = nfsd4_encode_components('/', root, &p, buflen);
1760 if (status)
1761 return status;
1762 if ((*buflen -= 4) < 0)
1763 return nfserr_resource;
1764 WRITE32(fslocs->locations_count);
1765 for (i=0; i<fslocs->locations_count; i++) {
1766 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1767 &p, buflen);
1768 if (status)
1769 return status;
1770 }
1771 *pp = p;
1772 return 0;
1773 }
1774
1775 static u32 nfs4_file_type(umode_t mode)
1776 {
1777 switch (mode & S_IFMT) {
1778 case S_IFIFO: return NF4FIFO;
1779 case S_IFCHR: return NF4CHR;
1780 case S_IFDIR: return NF4DIR;
1781 case S_IFBLK: return NF4BLK;
1782 case S_IFLNK: return NF4LNK;
1783 case S_IFREG: return NF4REG;
1784 case S_IFSOCK: return NF4SOCK;
1785 default: return NF4BAD;
1786 };
1787 }
1788
1789 static __be32
1790 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1791 __be32 **p, int *buflen)
1792 {
1793 int status;
1794
1795 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1796 return nfserr_resource;
1797 if (whotype != NFS4_ACL_WHO_NAMED)
1798 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1799 else if (group)
1800 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1801 else
1802 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1803 if (status < 0)
1804 return nfserrno(status);
1805 *p = xdr_encode_opaque(*p, NULL, status);
1806 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1807 BUG_ON(*buflen < 0);
1808 return 0;
1809 }
1810
1811 static inline __be32
1812 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1813 {
1814 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1815 }
1816
1817 static inline __be32
1818 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1819 {
1820 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1821 }
1822
1823 static inline __be32
1824 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1825 __be32 **p, int *buflen)
1826 {
1827 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1828 }
1829
1830 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1831 FATTR4_WORD0_RDATTR_ERROR)
1832 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1833
1834 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1835 {
1836 /* As per referral draft: */
1837 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1838 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1839 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1840 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1841 *rdattr_err = NFSERR_MOVED;
1842 else
1843 return nfserr_moved;
1844 }
1845 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1846 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1847 return 0;
1848 }
1849
1850 /*
1851 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1852 * ourselves.
1853 *
1854 * @countp is the buffer size in _words_; upon successful return this becomes
1855 * replaced with the number of words written.
1856 */
1857 __be32
1858 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1859 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1860 struct svc_rqst *rqstp, int ignore_crossmnt)
1861 {
1862 u32 bmval0 = bmval[0];
1863 u32 bmval1 = bmval[1];
1864 u32 bmval2 = bmval[2];
1865 struct kstat stat;
1866 struct svc_fh tempfh;
1867 struct kstatfs statfs;
1868 int buflen = *countp << 2;
1869 __be32 *attrlenp;
1870 u32 dummy;
1871 u64 dummy64;
1872 u32 rdattr_err = 0;
1873 __be32 *p = buffer;
1874 __be32 status;
1875 int err;
1876 int aclsupport = 0;
1877 struct nfs4_acl *acl = NULL;
1878 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1879 u32 minorversion = resp->cstate.minorversion;
1880 struct path path = {
1881 .mnt = exp->ex_path.mnt,
1882 .dentry = dentry,
1883 };
1884
1885 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1886 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1887 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1888 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1889
1890 if (exp->ex_fslocs.migrated) {
1891 BUG_ON(bmval[2]);
1892 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1893 if (status)
1894 goto out;
1895 }
1896
1897 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1898 if (err)
1899 goto out_nfserr;
1900 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1901 FATTR4_WORD0_MAXNAME)) ||
1902 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1903 FATTR4_WORD1_SPACE_TOTAL))) {
1904 err = vfs_statfs(&path, &statfs);
1905 if (err)
1906 goto out_nfserr;
1907 }
1908 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1909 fh_init(&tempfh, NFS4_FHSIZE);
1910 status = fh_compose(&tempfh, exp, dentry, NULL);
1911 if (status)
1912 goto out;
1913 fhp = &tempfh;
1914 }
1915 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1916 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1917 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1918 aclsupport = (err == 0);
1919 if (bmval0 & FATTR4_WORD0_ACL) {
1920 if (err == -EOPNOTSUPP)
1921 bmval0 &= ~FATTR4_WORD0_ACL;
1922 else if (err == -EINVAL) {
1923 status = nfserr_attrnotsupp;
1924 goto out;
1925 } else if (err != 0)
1926 goto out_nfserr;
1927 }
1928 }
1929
1930 if (bmval2) {
1931 if ((buflen -= 16) < 0)
1932 goto out_resource;
1933 WRITE32(3);
1934 WRITE32(bmval0);
1935 WRITE32(bmval1);
1936 WRITE32(bmval2);
1937 } else if (bmval1) {
1938 if ((buflen -= 12) < 0)
1939 goto out_resource;
1940 WRITE32(2);
1941 WRITE32(bmval0);
1942 WRITE32(bmval1);
1943 } else {
1944 if ((buflen -= 8) < 0)
1945 goto out_resource;
1946 WRITE32(1);
1947 WRITE32(bmval0);
1948 }
1949 attrlenp = p++; /* to be backfilled later */
1950
1951 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1952 u32 word0 = nfsd_suppattrs0(minorversion);
1953 u32 word1 = nfsd_suppattrs1(minorversion);
1954 u32 word2 = nfsd_suppattrs2(minorversion);
1955
1956 if (!aclsupport)
1957 word0 &= ~FATTR4_WORD0_ACL;
1958 if (!word2) {
1959 if ((buflen -= 12) < 0)
1960 goto out_resource;
1961 WRITE32(2);
1962 WRITE32(word0);
1963 WRITE32(word1);
1964 } else {
1965 if ((buflen -= 16) < 0)
1966 goto out_resource;
1967 WRITE32(3);
1968 WRITE32(word0);
1969 WRITE32(word1);
1970 WRITE32(word2);
1971 }
1972 }
1973 if (bmval0 & FATTR4_WORD0_TYPE) {
1974 if ((buflen -= 4) < 0)
1975 goto out_resource;
1976 dummy = nfs4_file_type(stat.mode);
1977 if (dummy == NF4BAD)
1978 goto out_serverfault;
1979 WRITE32(dummy);
1980 }
1981 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1982 if ((buflen -= 4) < 0)
1983 goto out_resource;
1984 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1985 WRITE32(NFS4_FH_PERSISTENT);
1986 else
1987 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1988 }
1989 if (bmval0 & FATTR4_WORD0_CHANGE) {
1990 if ((buflen -= 8) < 0)
1991 goto out_resource;
1992 write_change(&p, &stat, dentry->d_inode);
1993 }
1994 if (bmval0 & FATTR4_WORD0_SIZE) {
1995 if ((buflen -= 8) < 0)
1996 goto out_resource;
1997 WRITE64(stat.size);
1998 }
1999 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2000 if ((buflen -= 4) < 0)
2001 goto out_resource;
2002 WRITE32(1);
2003 }
2004 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2005 if ((buflen -= 4) < 0)
2006 goto out_resource;
2007 WRITE32(1);
2008 }
2009 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2010 if ((buflen -= 4) < 0)
2011 goto out_resource;
2012 WRITE32(0);
2013 }
2014 if (bmval0 & FATTR4_WORD0_FSID) {
2015 if ((buflen -= 16) < 0)
2016 goto out_resource;
2017 if (exp->ex_fslocs.migrated) {
2018 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2019 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2020 } else switch(fsid_source(fhp)) {
2021 case FSIDSOURCE_FSID:
2022 WRITE64((u64)exp->ex_fsid);
2023 WRITE64((u64)0);
2024 break;
2025 case FSIDSOURCE_DEV:
2026 WRITE32(0);
2027 WRITE32(MAJOR(stat.dev));
2028 WRITE32(0);
2029 WRITE32(MINOR(stat.dev));
2030 break;
2031 case FSIDSOURCE_UUID:
2032 WRITEMEM(exp->ex_uuid, 16);
2033 break;
2034 }
2035 }
2036 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2037 if ((buflen -= 4) < 0)
2038 goto out_resource;
2039 WRITE32(0);
2040 }
2041 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2042 if ((buflen -= 4) < 0)
2043 goto out_resource;
2044 WRITE32(nfsd4_lease);
2045 }
2046 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2047 if ((buflen -= 4) < 0)
2048 goto out_resource;
2049 WRITE32(rdattr_err);
2050 }
2051 if (bmval0 & FATTR4_WORD0_ACL) {
2052 struct nfs4_ace *ace;
2053
2054 if (acl == NULL) {
2055 if ((buflen -= 4) < 0)
2056 goto out_resource;
2057
2058 WRITE32(0);
2059 goto out_acl;
2060 }
2061 if ((buflen -= 4) < 0)
2062 goto out_resource;
2063 WRITE32(acl->naces);
2064
2065 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2066 if ((buflen -= 4*3) < 0)
2067 goto out_resource;
2068 WRITE32(ace->type);
2069 WRITE32(ace->flag);
2070 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2071 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2072 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2073 &p, &buflen);
2074 if (status == nfserr_resource)
2075 goto out_resource;
2076 if (status)
2077 goto out;
2078 }
2079 }
2080 out_acl:
2081 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2082 if ((buflen -= 4) < 0)
2083 goto out_resource;
2084 WRITE32(aclsupport ?
2085 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2086 }
2087 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2088 if ((buflen -= 4) < 0)
2089 goto out_resource;
2090 WRITE32(1);
2091 }
2092 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2093 if ((buflen -= 4) < 0)
2094 goto out_resource;
2095 WRITE32(1);
2096 }
2097 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2098 if ((buflen -= 4) < 0)
2099 goto out_resource;
2100 WRITE32(1);
2101 }
2102 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2103 if ((buflen -= 4) < 0)
2104 goto out_resource;
2105 WRITE32(1);
2106 }
2107 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2108 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2109 if (buflen < 0)
2110 goto out_resource;
2111 WRITE32(fhp->fh_handle.fh_size);
2112 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2113 }
2114 if (bmval0 & FATTR4_WORD0_FILEID) {
2115 if ((buflen -= 8) < 0)
2116 goto out_resource;
2117 WRITE64(stat.ino);
2118 }
2119 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2120 if ((buflen -= 8) < 0)
2121 goto out_resource;
2122 WRITE64((u64) statfs.f_ffree);
2123 }
2124 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2125 if ((buflen -= 8) < 0)
2126 goto out_resource;
2127 WRITE64((u64) statfs.f_ffree);
2128 }
2129 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2130 if ((buflen -= 8) < 0)
2131 goto out_resource;
2132 WRITE64((u64) statfs.f_files);
2133 }
2134 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2135 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2136 if (status == nfserr_resource)
2137 goto out_resource;
2138 if (status)
2139 goto out;
2140 }
2141 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2142 if ((buflen -= 4) < 0)
2143 goto out_resource;
2144 WRITE32(1);
2145 }
2146 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2147 if ((buflen -= 8) < 0)
2148 goto out_resource;
2149 WRITE64(~(u64)0);
2150 }
2151 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2152 if ((buflen -= 4) < 0)
2153 goto out_resource;
2154 WRITE32(255);
2155 }
2156 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2157 if ((buflen -= 4) < 0)
2158 goto out_resource;
2159 WRITE32(statfs.f_namelen);
2160 }
2161 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2162 if ((buflen -= 8) < 0)
2163 goto out_resource;
2164 WRITE64((u64) svc_max_payload(rqstp));
2165 }
2166 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2167 if ((buflen -= 8) < 0)
2168 goto out_resource;
2169 WRITE64((u64) svc_max_payload(rqstp));
2170 }
2171 if (bmval1 & FATTR4_WORD1_MODE) {
2172 if ((buflen -= 4) < 0)
2173 goto out_resource;
2174 WRITE32(stat.mode & S_IALLUGO);
2175 }
2176 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2177 if ((buflen -= 4) < 0)
2178 goto out_resource;
2179 WRITE32(1);
2180 }
2181 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2182 if ((buflen -= 4) < 0)
2183 goto out_resource;
2184 WRITE32(stat.nlink);
2185 }
2186 if (bmval1 & FATTR4_WORD1_OWNER) {
2187 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2188 if (status == nfserr_resource)
2189 goto out_resource;
2190 if (status)
2191 goto out;
2192 }
2193 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2194 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2195 if (status == nfserr_resource)
2196 goto out_resource;
2197 if (status)
2198 goto out;
2199 }
2200 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2201 if ((buflen -= 8) < 0)
2202 goto out_resource;
2203 WRITE32((u32) MAJOR(stat.rdev));
2204 WRITE32((u32) MINOR(stat.rdev));
2205 }
2206 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2207 if ((buflen -= 8) < 0)
2208 goto out_resource;
2209 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2210 WRITE64(dummy64);
2211 }
2212 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2213 if ((buflen -= 8) < 0)
2214 goto out_resource;
2215 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2216 WRITE64(dummy64);
2217 }
2218 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2219 if ((buflen -= 8) < 0)
2220 goto out_resource;
2221 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2222 WRITE64(dummy64);
2223 }
2224 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2225 if ((buflen -= 8) < 0)
2226 goto out_resource;
2227 dummy64 = (u64)stat.blocks << 9;
2228 WRITE64(dummy64);
2229 }
2230 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2231 if ((buflen -= 12) < 0)
2232 goto out_resource;
2233 WRITE32(0);
2234 WRITE32(stat.atime.tv_sec);
2235 WRITE32(stat.atime.tv_nsec);
2236 }
2237 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2238 if ((buflen -= 12) < 0)
2239 goto out_resource;
2240 WRITE32(0);
2241 WRITE32(1);
2242 WRITE32(0);
2243 }
2244 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2245 if ((buflen -= 12) < 0)
2246 goto out_resource;
2247 WRITE32(0);
2248 WRITE32(stat.ctime.tv_sec);
2249 WRITE32(stat.ctime.tv_nsec);
2250 }
2251 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2252 if ((buflen -= 12) < 0)
2253 goto out_resource;
2254 WRITE32(0);
2255 WRITE32(stat.mtime.tv_sec);
2256 WRITE32(stat.mtime.tv_nsec);
2257 }
2258 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2259 if ((buflen -= 8) < 0)
2260 goto out_resource;
2261 /*
2262 * Get parent's attributes if not ignoring crossmount
2263 * and this is the root of a cross-mounted filesystem.
2264 */
2265 if (ignore_crossmnt == 0 &&
2266 dentry == exp->ex_path.mnt->mnt_root) {
2267 struct path path = exp->ex_path;
2268 path_get(&path);
2269 while (follow_up(&path)) {
2270 if (path.dentry != path.mnt->mnt_root)
2271 break;
2272 }
2273 err = vfs_getattr(path.mnt, path.dentry, &stat);
2274 path_put(&path);
2275 if (err)
2276 goto out_nfserr;
2277 }
2278 WRITE64(stat.ino);
2279 }
2280 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2281 WRITE32(3);
2282 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2283 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2284 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2285 }
2286
2287 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2288 *countp = p - buffer;
2289 status = nfs_ok;
2290
2291 out:
2292 kfree(acl);
2293 if (fhp == &tempfh)
2294 fh_put(&tempfh);
2295 return status;
2296 out_nfserr:
2297 status = nfserrno(err);
2298 goto out;
2299 out_resource:
2300 *countp = 0;
2301 status = nfserr_resource;
2302 goto out;
2303 out_serverfault:
2304 status = nfserr_serverfault;
2305 goto out;
2306 }
2307
2308 static inline int attributes_need_mount(u32 *bmval)
2309 {
2310 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2311 return 1;
2312 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2313 return 1;
2314 return 0;
2315 }
2316
2317 static __be32
2318 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2319 const char *name, int namlen, __be32 *p, int *buflen)
2320 {
2321 struct svc_export *exp = cd->rd_fhp->fh_export;
2322 struct dentry *dentry;
2323 __be32 nfserr;
2324 int ignore_crossmnt = 0;
2325
2326 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2327 if (IS_ERR(dentry))
2328 return nfserrno(PTR_ERR(dentry));
2329 if (!dentry->d_inode) {
2330 /*
2331 * nfsd_buffered_readdir drops the i_mutex between
2332 * readdir and calling this callback, leaving a window
2333 * where this directory entry could have gone away.
2334 */
2335 dput(dentry);
2336 return nfserr_noent;
2337 }
2338
2339 exp_get(exp);
2340 /*
2341 * In the case of a mountpoint, the client may be asking for
2342 * attributes that are only properties of the underlying filesystem
2343 * as opposed to the cross-mounted file system. In such a case,
2344 * we will not follow the cross mount and will fill the attribtutes
2345 * directly from the mountpoint dentry.
2346 */
2347 if (nfsd_mountpoint(dentry, exp)) {
2348 int err;
2349
2350 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2351 && !attributes_need_mount(cd->rd_bmval)) {
2352 ignore_crossmnt = 1;
2353 goto out_encode;
2354 }
2355 /*
2356 * Why the heck aren't we just using nfsd_lookup??
2357 * Different "."/".." handling? Something else?
2358 * At least, add a comment here to explain....
2359 */
2360 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2361 if (err) {
2362 nfserr = nfserrno(err);
2363 goto out_put;
2364 }
2365 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2366 if (nfserr)
2367 goto out_put;
2368
2369 }
2370 out_encode:
2371 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2372 cd->rd_rqstp, ignore_crossmnt);
2373 out_put:
2374 dput(dentry);
2375 exp_put(exp);
2376 return nfserr;
2377 }
2378
2379 static __be32 *
2380 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2381 {
2382 __be32 *attrlenp;
2383
2384 if (buflen < 6)
2385 return NULL;
2386 *p++ = htonl(2);
2387 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2388 *p++ = htonl(0); /* bmval1 */
2389
2390 attrlenp = p++;
2391 *p++ = nfserr; /* no htonl */
2392 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2393 return p;
2394 }
2395
2396 static int
2397 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2398 loff_t offset, u64 ino, unsigned int d_type)
2399 {
2400 struct readdir_cd *ccd = ccdv;
2401 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2402 int buflen;
2403 __be32 *p = cd->buffer;
2404 __be32 *cookiep;
2405 __be32 nfserr = nfserr_toosmall;
2406
2407 /* In nfsv4, "." and ".." never make it onto the wire.. */
2408 if (name && isdotent(name, namlen)) {
2409 cd->common.err = nfs_ok;
2410 return 0;
2411 }
2412
2413 if (cd->offset)
2414 xdr_encode_hyper(cd->offset, (u64) offset);
2415
2416 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2417 if (buflen < 0)
2418 goto fail;
2419
2420 *p++ = xdr_one; /* mark entry present */
2421 cookiep = p;
2422 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2423 p = xdr_encode_array(p, name, namlen); /* name length & name */
2424
2425 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2426 switch (nfserr) {
2427 case nfs_ok:
2428 p += buflen;
2429 break;
2430 case nfserr_resource:
2431 nfserr = nfserr_toosmall;
2432 goto fail;
2433 case nfserr_noent:
2434 goto skip_entry;
2435 default:
2436 /*
2437 * If the client requested the RDATTR_ERROR attribute,
2438 * we stuff the error code into this attribute
2439 * and continue. If this attribute was not requested,
2440 * then in accordance with the spec, we fail the
2441 * entire READDIR operation(!)
2442 */
2443 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2444 goto fail;
2445 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2446 if (p == NULL) {
2447 nfserr = nfserr_toosmall;
2448 goto fail;
2449 }
2450 }
2451 cd->buflen -= (p - cd->buffer);
2452 cd->buffer = p;
2453 cd->offset = cookiep;
2454 skip_entry:
2455 cd->common.err = nfs_ok;
2456 return 0;
2457 fail:
2458 cd->common.err = nfserr;
2459 return -EINVAL;
2460 }
2461
2462 static void
2463 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2464 {
2465 __be32 *p;
2466
2467 RESERVE_SPACE(sizeof(stateid_t));
2468 WRITE32(sid->si_generation);
2469 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2470 ADJUST_ARGS();
2471 }
2472
2473 static __be32
2474 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2475 {
2476 __be32 *p;
2477
2478 if (!nfserr) {
2479 RESERVE_SPACE(8);
2480 WRITE32(access->ac_supported);
2481 WRITE32(access->ac_resp_access);
2482 ADJUST_ARGS();
2483 }
2484 return nfserr;
2485 }
2486
2487 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2488 {
2489 __be32 *p;
2490
2491 if (!nfserr) {
2492 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2493 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2494 WRITE32(bcts->dir);
2495 /* XXX: ? */
2496 WRITE32(0);
2497 ADJUST_ARGS();
2498 }
2499 return nfserr;
2500 }
2501
2502 static __be32
2503 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2504 {
2505 ENCODE_SEQID_OP_HEAD;
2506
2507 if (!nfserr)
2508 nfsd4_encode_stateid(resp, &close->cl_stateid);
2509
2510 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2511 return nfserr;
2512 }
2513
2514
2515 static __be32
2516 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2517 {
2518 __be32 *p;
2519
2520 if (!nfserr) {
2521 RESERVE_SPACE(8);
2522 WRITEMEM(commit->co_verf.data, 8);
2523 ADJUST_ARGS();
2524 }
2525 return nfserr;
2526 }
2527
2528 static __be32
2529 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2530 {
2531 __be32 *p;
2532
2533 if (!nfserr) {
2534 RESERVE_SPACE(32);
2535 write_cinfo(&p, &create->cr_cinfo);
2536 WRITE32(2);
2537 WRITE32(create->cr_bmval[0]);
2538 WRITE32(create->cr_bmval[1]);
2539 ADJUST_ARGS();
2540 }
2541 return nfserr;
2542 }
2543
2544 static __be32
2545 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2546 {
2547 struct svc_fh *fhp = getattr->ga_fhp;
2548 int buflen;
2549
2550 if (nfserr)
2551 return nfserr;
2552
2553 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2554 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2555 resp->p, &buflen, getattr->ga_bmval,
2556 resp->rqstp, 0);
2557 if (!nfserr)
2558 resp->p += buflen;
2559 return nfserr;
2560 }
2561
2562 static __be32
2563 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2564 {
2565 struct svc_fh *fhp = *fhpp;
2566 unsigned int len;
2567 __be32 *p;
2568
2569 if (!nfserr) {
2570 len = fhp->fh_handle.fh_size;
2571 RESERVE_SPACE(len + 4);
2572 WRITE32(len);
2573 WRITEMEM(&fhp->fh_handle.fh_base, len);
2574 ADJUST_ARGS();
2575 }
2576 return nfserr;
2577 }
2578
2579 /*
2580 * Including all fields other than the name, a LOCK4denied structure requires
2581 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2582 */
2583 static void
2584 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2585 {
2586 __be32 *p;
2587
2588 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2589 WRITE64(ld->ld_start);
2590 WRITE64(ld->ld_length);
2591 WRITE32(ld->ld_type);
2592 if (ld->ld_sop) {
2593 WRITEMEM(&ld->ld_clientid, 8);
2594 WRITE32(ld->ld_sop->so_owner.len);
2595 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2596 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2597 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2598 WRITE64((u64)0); /* clientid */
2599 WRITE32(0); /* length of owner name */
2600 }
2601 ADJUST_ARGS();
2602 }
2603
2604 static __be32
2605 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2606 {
2607 ENCODE_SEQID_OP_HEAD;
2608
2609 if (!nfserr)
2610 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2611 else if (nfserr == nfserr_denied)
2612 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2613
2614 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2615 return nfserr;
2616 }
2617
2618 static __be32
2619 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2620 {
2621 if (nfserr == nfserr_denied)
2622 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2623 return nfserr;
2624 }
2625
2626 static __be32
2627 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2628 {
2629 ENCODE_SEQID_OP_HEAD;
2630
2631 if (!nfserr)
2632 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2633
2634 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2635 return nfserr;
2636 }
2637
2638
2639 static __be32
2640 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2641 {
2642 __be32 *p;
2643
2644 if (!nfserr) {
2645 RESERVE_SPACE(20);
2646 write_cinfo(&p, &link->li_cinfo);
2647 ADJUST_ARGS();
2648 }
2649 return nfserr;
2650 }
2651
2652
2653 static __be32
2654 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2655 {
2656 __be32 *p;
2657 ENCODE_SEQID_OP_HEAD;
2658
2659 if (nfserr)
2660 goto out;
2661
2662 nfsd4_encode_stateid(resp, &open->op_stateid);
2663 RESERVE_SPACE(40);
2664 write_cinfo(&p, &open->op_cinfo);
2665 WRITE32(open->op_rflags);
2666 WRITE32(2);
2667 WRITE32(open->op_bmval[0]);
2668 WRITE32(open->op_bmval[1]);
2669 WRITE32(open->op_delegate_type);
2670 ADJUST_ARGS();
2671
2672 switch (open->op_delegate_type) {
2673 case NFS4_OPEN_DELEGATE_NONE:
2674 break;
2675 case NFS4_OPEN_DELEGATE_READ:
2676 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2677 RESERVE_SPACE(20);
2678 WRITE32(open->op_recall);
2679
2680 /*
2681 * TODO: ACE's in delegations
2682 */
2683 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2684 WRITE32(0);
2685 WRITE32(0);
2686 WRITE32(0); /* XXX: is NULL principal ok? */
2687 ADJUST_ARGS();
2688 break;
2689 case NFS4_OPEN_DELEGATE_WRITE:
2690 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2691 RESERVE_SPACE(32);
2692 WRITE32(0);
2693
2694 /*
2695 * TODO: space_limit's in delegations
2696 */
2697 WRITE32(NFS4_LIMIT_SIZE);
2698 WRITE32(~(u32)0);
2699 WRITE32(~(u32)0);
2700
2701 /*
2702 * TODO: ACE's in delegations
2703 */
2704 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2705 WRITE32(0);
2706 WRITE32(0);
2707 WRITE32(0); /* XXX: is NULL principal ok? */
2708 ADJUST_ARGS();
2709 break;
2710 default:
2711 BUG();
2712 }
2713 /* XXX save filehandle here */
2714 out:
2715 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2716 return nfserr;
2717 }
2718
2719 static __be32
2720 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2721 {
2722 ENCODE_SEQID_OP_HEAD;
2723
2724 if (!nfserr)
2725 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2726
2727 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2728 return nfserr;
2729 }
2730
2731 static __be32
2732 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2733 {
2734 ENCODE_SEQID_OP_HEAD;
2735
2736 if (!nfserr)
2737 nfsd4_encode_stateid(resp, &od->od_stateid);
2738
2739 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2740 return nfserr;
2741 }
2742
2743 static __be32
2744 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2745 struct nfsd4_read *read)
2746 {
2747 u32 eof;
2748 int v, pn;
2749 unsigned long maxcount;
2750 long len;
2751 __be32 *p;
2752
2753 if (nfserr)
2754 return nfserr;
2755 if (resp->xbuf->page_len)
2756 return nfserr_resource;
2757
2758 RESERVE_SPACE(8); /* eof flag and byte count */
2759
2760 maxcount = svc_max_payload(resp->rqstp);
2761 if (maxcount > read->rd_length)
2762 maxcount = read->rd_length;
2763
2764 len = maxcount;
2765 v = 0;
2766 while (len > 0) {
2767 pn = resp->rqstp->rq_resused++;
2768 resp->rqstp->rq_vec[v].iov_base =
2769 page_address(resp->rqstp->rq_respages[pn]);
2770 resp->rqstp->rq_vec[v].iov_len =
2771 len < PAGE_SIZE ? len : PAGE_SIZE;
2772 v++;
2773 len -= PAGE_SIZE;
2774 }
2775 read->rd_vlen = v;
2776
2777 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2778 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2779 &maxcount);
2780
2781 if (nfserr == nfserr_symlink)
2782 nfserr = nfserr_inval;
2783 if (nfserr)
2784 return nfserr;
2785 eof = (read->rd_offset + maxcount >=
2786 read->rd_fhp->fh_dentry->d_inode->i_size);
2787
2788 WRITE32(eof);
2789 WRITE32(maxcount);
2790 ADJUST_ARGS();
2791 resp->xbuf->head[0].iov_len = (char*)p
2792 - (char*)resp->xbuf->head[0].iov_base;
2793 resp->xbuf->page_len = maxcount;
2794
2795 /* Use rest of head for padding and remaining ops: */
2796 resp->xbuf->tail[0].iov_base = p;
2797 resp->xbuf->tail[0].iov_len = 0;
2798 if (maxcount&3) {
2799 RESERVE_SPACE(4);
2800 WRITE32(0);
2801 resp->xbuf->tail[0].iov_base += maxcount&3;
2802 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2803 ADJUST_ARGS();
2804 }
2805 return 0;
2806 }
2807
2808 static __be32
2809 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2810 {
2811 int maxcount;
2812 char *page;
2813 __be32 *p;
2814
2815 if (nfserr)
2816 return nfserr;
2817 if (resp->xbuf->page_len)
2818 return nfserr_resource;
2819
2820 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2821
2822 maxcount = PAGE_SIZE;
2823 RESERVE_SPACE(4);
2824
2825 /*
2826 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2827 * if they would overflow the buffer. Is this kosher in NFSv4? If
2828 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2829 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2830 */
2831 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2832 if (nfserr == nfserr_isdir)
2833 return nfserr_inval;
2834 if (nfserr)
2835 return nfserr;
2836
2837 WRITE32(maxcount);
2838 ADJUST_ARGS();
2839 resp->xbuf->head[0].iov_len = (char*)p
2840 - (char*)resp->xbuf->head[0].iov_base;
2841 resp->xbuf->page_len = maxcount;
2842
2843 /* Use rest of head for padding and remaining ops: */
2844 resp->xbuf->tail[0].iov_base = p;
2845 resp->xbuf->tail[0].iov_len = 0;
2846 if (maxcount&3) {
2847 RESERVE_SPACE(4);
2848 WRITE32(0);
2849 resp->xbuf->tail[0].iov_base += maxcount&3;
2850 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2851 ADJUST_ARGS();
2852 }
2853 return 0;
2854 }
2855
2856 static __be32
2857 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2858 {
2859 int maxcount;
2860 loff_t offset;
2861 __be32 *page, *savep, *tailbase;
2862 __be32 *p;
2863
2864 if (nfserr)
2865 return nfserr;
2866 if (resp->xbuf->page_len)
2867 return nfserr_resource;
2868
2869 RESERVE_SPACE(8); /* verifier */
2870 savep = p;
2871
2872 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2873 WRITE32(0);
2874 WRITE32(0);
2875 ADJUST_ARGS();
2876 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2877 tailbase = p;
2878
2879 maxcount = PAGE_SIZE;
2880 if (maxcount > readdir->rd_maxcount)
2881 maxcount = readdir->rd_maxcount;
2882
2883 /*
2884 * Convert from bytes to words, account for the two words already
2885 * written, make sure to leave two words at the end for the next
2886 * pointer and eof field.
2887 */
2888 maxcount = (maxcount >> 2) - 4;
2889 if (maxcount < 0) {
2890 nfserr = nfserr_toosmall;
2891 goto err_no_verf;
2892 }
2893
2894 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2895 readdir->common.err = 0;
2896 readdir->buflen = maxcount;
2897 readdir->buffer = page;
2898 readdir->offset = NULL;
2899
2900 offset = readdir->rd_cookie;
2901 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2902 &offset,
2903 &readdir->common, nfsd4_encode_dirent);
2904 if (nfserr == nfs_ok &&
2905 readdir->common.err == nfserr_toosmall &&
2906 readdir->buffer == page)
2907 nfserr = nfserr_toosmall;
2908 if (nfserr == nfserr_symlink)
2909 nfserr = nfserr_notdir;
2910 if (nfserr)
2911 goto err_no_verf;
2912
2913 if (readdir->offset)
2914 xdr_encode_hyper(readdir->offset, offset);
2915
2916 p = readdir->buffer;
2917 *p++ = 0; /* no more entries */
2918 *p++ = htonl(readdir->common.err == nfserr_eof);
2919 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2920 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2921
2922 /* Use rest of head for padding and remaining ops: */
2923 resp->xbuf->tail[0].iov_base = tailbase;
2924 resp->xbuf->tail[0].iov_len = 0;
2925 resp->p = resp->xbuf->tail[0].iov_base;
2926 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2927
2928 return 0;
2929 err_no_verf:
2930 p = savep;
2931 ADJUST_ARGS();
2932 return nfserr;
2933 }
2934
2935 static __be32
2936 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2937 {
2938 __be32 *p;
2939
2940 if (!nfserr) {
2941 RESERVE_SPACE(20);
2942 write_cinfo(&p, &remove->rm_cinfo);
2943 ADJUST_ARGS();
2944 }
2945 return nfserr;
2946 }
2947
2948 static __be32
2949 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2950 {
2951 __be32 *p;
2952
2953 if (!nfserr) {
2954 RESERVE_SPACE(40);
2955 write_cinfo(&p, &rename->rn_sinfo);
2956 write_cinfo(&p, &rename->rn_tinfo);
2957 ADJUST_ARGS();
2958 }
2959 return nfserr;
2960 }
2961
2962 static __be32
2963 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2964 __be32 nfserr,struct svc_export *exp)
2965 {
2966 int i = 0;
2967 u32 nflavs;
2968 struct exp_flavor_info *flavs;
2969 struct exp_flavor_info def_flavs[2];
2970 __be32 *p;
2971
2972 if (nfserr)
2973 goto out;
2974 if (exp->ex_nflavors) {
2975 flavs = exp->ex_flavors;
2976 nflavs = exp->ex_nflavors;
2977 } else { /* Handling of some defaults in absence of real secinfo: */
2978 flavs = def_flavs;
2979 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2980 nflavs = 2;
2981 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2982 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2983 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2984 nflavs = 1;
2985 flavs[0].pseudoflavor
2986 = svcauth_gss_flavor(exp->ex_client);
2987 } else {
2988 nflavs = 1;
2989 flavs[0].pseudoflavor
2990 = exp->ex_client->flavour->flavour;
2991 }
2992 }
2993
2994 RESERVE_SPACE(4);
2995 WRITE32(nflavs);
2996 ADJUST_ARGS();
2997 for (i = 0; i < nflavs; i++) {
2998 u32 flav = flavs[i].pseudoflavor;
2999 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3000
3001 if (gm) {
3002 RESERVE_SPACE(4);
3003 WRITE32(RPC_AUTH_GSS);
3004 ADJUST_ARGS();
3005 RESERVE_SPACE(4 + gm->gm_oid.len);
3006 WRITE32(gm->gm_oid.len);
3007 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3008 ADJUST_ARGS();
3009 RESERVE_SPACE(4);
3010 WRITE32(0); /* qop */
3011 ADJUST_ARGS();
3012 RESERVE_SPACE(4);
3013 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3014 ADJUST_ARGS();
3015 gss_mech_put(gm);
3016 } else {
3017 RESERVE_SPACE(4);
3018 WRITE32(flav);
3019 ADJUST_ARGS();
3020 }
3021 }
3022 out:
3023 if (exp)
3024 exp_put(exp);
3025 return nfserr;
3026 }
3027
3028 static __be32
3029 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3030 struct nfsd4_secinfo *secinfo)
3031 {
3032 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3033 }
3034
3035 static __be32
3036 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3037 struct nfsd4_secinfo_no_name *secinfo)
3038 {
3039 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3040 }
3041
3042 /*
3043 * The SETATTR encode routine is special -- it always encodes a bitmap,
3044 * regardless of the error status.
3045 */
3046 static __be32
3047 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3048 {
3049 __be32 *p;
3050
3051 RESERVE_SPACE(12);
3052 if (nfserr) {
3053 WRITE32(2);
3054 WRITE32(0);
3055 WRITE32(0);
3056 }
3057 else {
3058 WRITE32(2);
3059 WRITE32(setattr->sa_bmval[0]);
3060 WRITE32(setattr->sa_bmval[1]);
3061 }
3062 ADJUST_ARGS();
3063 return nfserr;
3064 }
3065
3066 static __be32
3067 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3068 {
3069 __be32 *p;
3070
3071 if (!nfserr) {
3072 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3073 WRITEMEM(&scd->se_clientid, 8);
3074 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3075 ADJUST_ARGS();
3076 }
3077 else if (nfserr == nfserr_clid_inuse) {
3078 RESERVE_SPACE(8);
3079 WRITE32(0);
3080 WRITE32(0);
3081 ADJUST_ARGS();
3082 }
3083 return nfserr;
3084 }
3085
3086 static __be32
3087 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3088 {
3089 __be32 *p;
3090
3091 if (!nfserr) {
3092 RESERVE_SPACE(16);
3093 WRITE32(write->wr_bytes_written);
3094 WRITE32(write->wr_how_written);
3095 WRITEMEM(write->wr_verifier.data, 8);
3096 ADJUST_ARGS();
3097 }
3098 return nfserr;
3099 }
3100
3101 static __be32
3102 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3103 struct nfsd4_exchange_id *exid)
3104 {
3105 __be32 *p;
3106 char *major_id;
3107 char *server_scope;
3108 int major_id_sz;
3109 int server_scope_sz;
3110 uint64_t minor_id = 0;
3111
3112 if (nfserr)
3113 return nfserr;
3114
3115 major_id = utsname()->nodename;
3116 major_id_sz = strlen(major_id);
3117 server_scope = utsname()->nodename;
3118 server_scope_sz = strlen(server_scope);
3119
3120 RESERVE_SPACE(
3121 8 /* eir_clientid */ +
3122 4 /* eir_sequenceid */ +
3123 4 /* eir_flags */ +
3124 4 /* spr_how (SP4_NONE) */ +
3125 8 /* so_minor_id */ +
3126 4 /* so_major_id.len */ +
3127 (XDR_QUADLEN(major_id_sz) * 4) +
3128 4 /* eir_server_scope.len */ +
3129 (XDR_QUADLEN(server_scope_sz) * 4) +
3130 4 /* eir_server_impl_id.count (0) */);
3131
3132 WRITEMEM(&exid->clientid, 8);
3133 WRITE32(exid->seqid);
3134 WRITE32(exid->flags);
3135
3136 /* state_protect4_r. Currently only support SP4_NONE */
3137 BUG_ON(exid->spa_how != SP4_NONE);
3138 WRITE32(exid->spa_how);
3139
3140 /* The server_owner struct */
3141 WRITE64(minor_id); /* Minor id */
3142 /* major id */
3143 WRITE32(major_id_sz);
3144 WRITEMEM(major_id, major_id_sz);
3145
3146 /* Server scope */
3147 WRITE32(server_scope_sz);
3148 WRITEMEM(server_scope, server_scope_sz);
3149
3150 /* Implementation id */
3151 WRITE32(0); /* zero length nfs_impl_id4 array */
3152 ADJUST_ARGS();
3153 return 0;
3154 }
3155
3156 static __be32
3157 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3158 struct nfsd4_create_session *sess)
3159 {
3160 __be32 *p;
3161
3162 if (nfserr)
3163 return nfserr;
3164
3165 RESERVE_SPACE(24);
3166 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3167 WRITE32(sess->seqid);
3168 WRITE32(sess->flags);
3169 ADJUST_ARGS();
3170
3171 RESERVE_SPACE(28);
3172 WRITE32(0); /* headerpadsz */
3173 WRITE32(sess->fore_channel.maxreq_sz);
3174 WRITE32(sess->fore_channel.maxresp_sz);
3175 WRITE32(sess->fore_channel.maxresp_cached);
3176 WRITE32(sess->fore_channel.maxops);
3177 WRITE32(sess->fore_channel.maxreqs);
3178 WRITE32(sess->fore_channel.nr_rdma_attrs);
3179 ADJUST_ARGS();
3180
3181 if (sess->fore_channel.nr_rdma_attrs) {
3182 RESERVE_SPACE(4);
3183 WRITE32(sess->fore_channel.rdma_attrs);
3184 ADJUST_ARGS();
3185 }
3186
3187 RESERVE_SPACE(28);
3188 WRITE32(0); /* headerpadsz */
3189 WRITE32(sess->back_channel.maxreq_sz);
3190 WRITE32(sess->back_channel.maxresp_sz);
3191 WRITE32(sess->back_channel.maxresp_cached);
3192 WRITE32(sess->back_channel.maxops);
3193 WRITE32(sess->back_channel.maxreqs);
3194 WRITE32(sess->back_channel.nr_rdma_attrs);
3195 ADJUST_ARGS();
3196
3197 if (sess->back_channel.nr_rdma_attrs) {
3198 RESERVE_SPACE(4);
3199 WRITE32(sess->back_channel.rdma_attrs);
3200 ADJUST_ARGS();
3201 }
3202 return 0;
3203 }
3204
3205 static __be32
3206 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3207 struct nfsd4_destroy_session *destroy_session)
3208 {
3209 return nfserr;
3210 }
3211
3212 static __be32
3213 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3214 struct nfsd4_free_stateid *free_stateid)
3215 {
3216 __be32 *p;
3217
3218 if (nfserr)
3219 return nfserr;
3220
3221 RESERVE_SPACE(4);
3222 WRITE32(nfserr);
3223 ADJUST_ARGS();
3224 return nfserr;
3225 }
3226
3227 static __be32
3228 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3229 struct nfsd4_sequence *seq)
3230 {
3231 __be32 *p;
3232
3233 if (nfserr)
3234 return nfserr;
3235
3236 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3237 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3238 WRITE32(seq->seqid);
3239 WRITE32(seq->slotid);
3240 WRITE32(seq->maxslots);
3241 /* For now: target_maxslots = maxslots */
3242 WRITE32(seq->maxslots);
3243 WRITE32(seq->status_flags);
3244
3245 ADJUST_ARGS();
3246 resp->cstate.datap = p; /* DRC cache data pointer */
3247 return 0;
3248 }
3249
3250 __be32
3251 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3252 struct nfsd4_test_stateid *test_stateid)
3253 {
3254 struct nfsd4_compoundargs *argp;
3255 stateid_t si;
3256 __be32 *p;
3257 int i;
3258 int valid;
3259
3260 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3261 argp = test_stateid->ts_saved_args;
3262
3263 RESERVE_SPACE(4);
3264 *p++ = htonl(test_stateid->ts_num_ids);
3265 resp->p = p;
3266
3267 nfs4_lock_state();
3268 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3269 nfsd4_decode_stateid(argp, &si);
3270 valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session);
3271 RESERVE_SPACE(4);
3272 *p++ = htonl(valid);
3273 resp->p = p;
3274 }
3275 nfs4_unlock_state();
3276
3277 return nfserr;
3278 }
3279
3280 static __be32
3281 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3282 {
3283 return nfserr;
3284 }
3285
3286 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3287
3288 /*
3289 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3290 * since we don't need to filter out obsolete ops as this is
3291 * done in the decoding phase.
3292 */
3293 static nfsd4_enc nfsd4_enc_ops[] = {
3294 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3295 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3296 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3297 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3298 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3299 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3300 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3301 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3302 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3303 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3304 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3305 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3306 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3307 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3308 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3309 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3310 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3311 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3312 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3313 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3314 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3315 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3316 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3317 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3318 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3319 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3320 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3321 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3322 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3323 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3324 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3325 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3326 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3327 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3328 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3329 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3330 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3331
3332 /* NFSv4.1 operations */
3333 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3334 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3335 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3336 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3337 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3338 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3339 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3340 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3341 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3342 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3343 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3344 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3345 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3346 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3347 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3348 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3349 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3350 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3351 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3352 };
3353
3354 /*
3355 * Calculate the total amount of memory that the compound response has taken
3356 * after encoding the current operation.
3357 *
3358 * pad: add on 8 bytes for the next operation's op_code and status so that
3359 * there is room to cache a failure on the next operation.
3360 *
3361 * Compare this length to the session se_fmaxresp_cached.
3362 *
3363 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3364 * will be at least a page and will therefore hold the xdr_buf head.
3365 */
3366 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3367 {
3368 int status = 0;
3369 struct xdr_buf *xb = &resp->rqstp->rq_res;
3370 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3371 struct nfsd4_session *session = NULL;
3372 struct nfsd4_slot *slot = resp->cstate.slot;
3373 u32 length, tlen = 0, pad = 8;
3374
3375 if (!nfsd4_has_session(&resp->cstate))
3376 return status;
3377
3378 session = resp->cstate.session;
3379 if (session == NULL || slot->sl_cachethis == 0)
3380 return status;
3381
3382 if (resp->opcnt >= args->opcnt)
3383 pad = 0; /* this is the last operation */
3384
3385 if (xb->page_len == 0) {
3386 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3387 } else {
3388 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3389 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3390
3391 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3392 }
3393 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3394 length, xb->page_len, tlen, pad);
3395
3396 if (length <= session->se_fchannel.maxresp_cached)
3397 return status;
3398 else
3399 return nfserr_rep_too_big_to_cache;
3400 }
3401
3402 void
3403 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3404 {
3405 __be32 *statp;
3406 __be32 *p;
3407
3408 RESERVE_SPACE(8);
3409 WRITE32(op->opnum);
3410 statp = p++; /* to be backfilled at the end */
3411 ADJUST_ARGS();
3412
3413 if (op->opnum == OP_ILLEGAL)
3414 goto status;
3415 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3416 !nfsd4_enc_ops[op->opnum]);
3417 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3418 /* nfsd4_check_drc_limit guarantees enough room for error status */
3419 if (!op->status && nfsd4_check_drc_limit(resp))
3420 op->status = nfserr_rep_too_big_to_cache;
3421 status:
3422 /*
3423 * Note: We write the status directly, instead of using WRITE32(),
3424 * since it is already in network byte order.
3425 */
3426 *statp = op->status;
3427 }
3428
3429 /*
3430 * Encode the reply stored in the stateowner reply cache
3431 *
3432 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3433 * previously sent already encoded operation.
3434 *
3435 * called with nfs4_lock_state() held
3436 */
3437 void
3438 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3439 {
3440 __be32 *p;
3441 struct nfs4_replay *rp = op->replay;
3442
3443 BUG_ON(!rp);
3444
3445 RESERVE_SPACE(8);
3446 WRITE32(op->opnum);
3447 *p++ = rp->rp_status; /* already xdr'ed */
3448 ADJUST_ARGS();
3449
3450 RESERVE_SPACE(rp->rp_buflen);
3451 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3452 ADJUST_ARGS();
3453 }
3454
3455 int
3456 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3457 {
3458 return xdr_ressize_check(rqstp, p);
3459 }
3460
3461 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3462 {
3463 struct svc_rqst *rqstp = rq;
3464 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3465
3466 if (args->ops != args->iops) {
3467 kfree(args->ops);
3468 args->ops = args->iops;
3469 }
3470 kfree(args->tmpp);
3471 args->tmpp = NULL;
3472 while (args->to_free) {
3473 struct tmpbuf *tb = args->to_free;
3474 args->to_free = tb->next;
3475 tb->release(tb->buf);
3476 kfree(tb);
3477 }
3478 return 1;
3479 }
3480
3481 int
3482 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3483 {
3484 args->p = p;
3485 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3486 args->pagelist = rqstp->rq_arg.pages;
3487 args->pagelen = rqstp->rq_arg.page_len;
3488 args->tmpp = NULL;
3489 args->to_free = NULL;
3490 args->ops = args->iops;
3491 args->rqstp = rqstp;
3492
3493 return !nfsd4_decode_compound(args);
3494 }
3495
3496 int
3497 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3498 {
3499 /*
3500 * All that remains is to write the tag and operation count...
3501 */
3502 struct nfsd4_compound_state *cs = &resp->cstate;
3503 struct kvec *iov;
3504 p = resp->tagp;
3505 *p++ = htonl(resp->taglen);
3506 memcpy(p, resp->tag, resp->taglen);
3507 p += XDR_QUADLEN(resp->taglen);
3508 *p++ = htonl(resp->opcnt);
3509
3510 if (rqstp->rq_res.page_len)
3511 iov = &rqstp->rq_res.tail[0];
3512 else
3513 iov = &rqstp->rq_res.head[0];
3514 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3515 BUG_ON(iov->iov_len > PAGE_SIZE);
3516 if (nfsd4_has_session(cs)) {
3517 if (cs->status != nfserr_replay_cache) {
3518 nfsd4_store_cache_entry(resp);
3519 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3520 cs->slot->sl_inuse = false;
3521 }
3522 /* Renew the clientid on success and on replay */
3523 release_session_client(cs->session);
3524 nfsd4_put_session(cs->session);
3525 }
3526 return 1;
3527 }
3528
3529 /*
3530 * Local variables:
3531 * c-basic-offset: 8
3532 * End:
3533 */
Linux kernel - Deliverables
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