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cifs: always do is_path_accessible check in cifs_mount
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4xdr.c
blobc6766af00d983ec2573266b6592f62fc2f8ba1c9
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/sunrpc/svcauth_gss.h>
48
49 #include "idmap.h"
50 #include "acl.h"
51 #include "xdr4.h"
52 #include "vfs.h"
53
54
55 #define NFSDDBG_FACILITY NFSDDBG_XDR
56
57 /*
58 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
59 * directory in order to indicate to the client that a filesystem boundary is present
60 * We use a fixed fsid for a referral
61 */
62 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
63 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
64
65 static __be32
66 check_filename(char *str, int len, __be32 err)
67 {
68 int i;
69
70 if (len == 0)
71 return nfserr_inval;
72 if (isdotent(str, len))
73 return err;
74 for (i = 0; i < len; i++)
75 if (str[i] == '/')
76 return err;
77 return 0;
78 }
79
80 #define DECODE_HEAD \
81 __be32 *p; \
82 __be32 status
83 #define DECODE_TAIL \
84 status = 0; \
85 out: \
86 return status; \
87 xdr_error: \
88 dprintk("NFSD: xdr error (%s:%d)\n", \
89 __FILE__, __LINE__); \
90 status = nfserr_bad_xdr; \
91 goto out
92
93 #define READ32(x) (x) = ntohl(*p++)
94 #define READ64(x) do { \
95 (x) = (u64)ntohl(*p++) << 32; \
96 (x) |= ntohl(*p++); \
97 } while (0)
98 #define READTIME(x) do { \
99 p++; \
100 (x) = ntohl(*p++); \
101 p++; \
102 } while (0)
103 #define READMEM(x,nbytes) do { \
104 x = (char *)p; \
105 p += XDR_QUADLEN(nbytes); \
106 } while (0)
107 #define SAVEMEM(x,nbytes) do { \
108 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
109 savemem(argp, p, nbytes) : \
110 (char *)p)) { \
111 dprintk("NFSD: xdr error (%s:%d)\n", \
112 __FILE__, __LINE__); \
113 goto xdr_error; \
114 } \
115 p += XDR_QUADLEN(nbytes); \
116 } while (0)
117 #define COPYMEM(x,nbytes) do { \
118 memcpy((x), p, nbytes); \
119 p += XDR_QUADLEN(nbytes); \
120 } while (0)
121
122 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
123 #define READ_BUF(nbytes) do { \
124 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
125 p = argp->p; \
126 argp->p += XDR_QUADLEN(nbytes); \
127 } else if (!(p = read_buf(argp, nbytes))) { \
128 dprintk("NFSD: xdr error (%s:%d)\n", \
129 __FILE__, __LINE__); \
130 goto xdr_error; \
131 } \
132 } while (0)
133
134 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
135 {
136 /* We want more bytes than seem to be available.
137 * Maybe we need a new page, maybe we have just run out
138 */
139 unsigned int avail = (char *)argp->end - (char *)argp->p;
140 __be32 *p;
141 if (avail + argp->pagelen < nbytes)
142 return NULL;
143 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
144 return NULL;
145 /* ok, we can do it with the current plus the next page */
146 if (nbytes <= sizeof(argp->tmp))
147 p = argp->tmp;
148 else {
149 kfree(argp->tmpp);
150 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
151 if (!p)
152 return NULL;
153
154 }
155 /*
156 * The following memcpy is safe because read_buf is always
157 * called with nbytes > avail, and the two cases above both
158 * guarantee p points to at least nbytes bytes.
159 */
160 memcpy(p, argp->p, avail);
161 /* step to next page */
162 argp->p = page_address(argp->pagelist[0]);
163 argp->pagelist++;
164 if (argp->pagelen < PAGE_SIZE) {
165 argp->end = argp->p + (argp->pagelen>>2);
166 argp->pagelen = 0;
167 } else {
168 argp->end = argp->p + (PAGE_SIZE>>2);
169 argp->pagelen -= PAGE_SIZE;
170 }
171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172 argp->p += XDR_QUADLEN(nbytes - avail);
173 return p;
174 }
175
176 static int zero_clientid(clientid_t *clid)
177 {
178 return (clid->cl_boot == 0) && (clid->cl_id == 0);
179 }
180
181 static int
182 defer_free(struct nfsd4_compoundargs *argp,
183 void (*release)(const void *), void *p)
184 {
185 struct tmpbuf *tb;
186
187 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
188 if (!tb)
189 return -ENOMEM;
190 tb->buf = p;
191 tb->release = release;
192 tb->next = argp->to_free;
193 argp->to_free = tb;
194 return 0;
195 }
196
197 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
198 {
199 if (p == argp->tmp) {
200 p = kmalloc(nbytes, GFP_KERNEL);
201 if (!p)
202 return NULL;
203 memcpy(p, argp->tmp, nbytes);
204 } else {
205 BUG_ON(p != argp->tmpp);
206 argp->tmpp = NULL;
207 }
208 if (defer_free(argp, kfree, p)) {
209 kfree(p);
210 return NULL;
211 } else
212 return (char *)p;
213 }
214
215 static __be32
216 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
217 {
218 u32 bmlen;
219 DECODE_HEAD;
220
221 bmval[0] = 0;
222 bmval[1] = 0;
223 bmval[2] = 0;
224
225 READ_BUF(4);
226 READ32(bmlen);
227 if (bmlen > 1000)
228 goto xdr_error;
229
230 READ_BUF(bmlen << 2);
231 if (bmlen > 0)
232 READ32(bmval[0]);
233 if (bmlen > 1)
234 READ32(bmval[1]);
235 if (bmlen > 2)
236 READ32(bmval[2]);
237
238 DECODE_TAIL;
239 }
240
241 static __be32
242 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
243 struct iattr *iattr, struct nfs4_acl **acl)
244 {
245 int expected_len, len = 0;
246 u32 dummy32;
247 char *buf;
248 int host_err;
249
250 DECODE_HEAD;
251 iattr->ia_valid = 0;
252 if ((status = nfsd4_decode_bitmap(argp, bmval)))
253 return status;
254
255 READ_BUF(4);
256 READ32(expected_len);
257
258 if (bmval[0] & FATTR4_WORD0_SIZE) {
259 READ_BUF(8);
260 len += 8;
261 READ64(iattr->ia_size);
262 iattr->ia_valid |= ATTR_SIZE;
263 }
264 if (bmval[0] & FATTR4_WORD0_ACL) {
265 int nace;
266 struct nfs4_ace *ace;
267
268 READ_BUF(4); len += 4;
269 READ32(nace);
270
271 if (nace > NFS4_ACL_MAX)
272 return nfserr_resource;
273
274 *acl = nfs4_acl_new(nace);
275 if (*acl == NULL) {
276 host_err = -ENOMEM;
277 goto out_nfserr;
278 }
279 defer_free(argp, kfree, *acl);
280
281 (*acl)->naces = nace;
282 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
283 READ_BUF(16); len += 16;
284 READ32(ace->type);
285 READ32(ace->flag);
286 READ32(ace->access_mask);
287 READ32(dummy32);
288 READ_BUF(dummy32);
289 len += XDR_QUADLEN(dummy32) << 2;
290 READMEM(buf, dummy32);
291 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
292 status = nfs_ok;
293 if (ace->whotype != NFS4_ACL_WHO_NAMED)
294 ace->who = 0;
295 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
296 status = nfsd_map_name_to_gid(argp->rqstp,
297 buf, dummy32, &ace->who);
298 else
299 status = nfsd_map_name_to_uid(argp->rqstp,
300 buf, dummy32, &ace->who);
301 if (status)
302 return status;
303 }
304 } else
305 *acl = NULL;
306 if (bmval[1] & FATTR4_WORD1_MODE) {
307 READ_BUF(4);
308 len += 4;
309 READ32(iattr->ia_mode);
310 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
311 iattr->ia_valid |= ATTR_MODE;
312 }
313 if (bmval[1] & FATTR4_WORD1_OWNER) {
314 READ_BUF(4);
315 len += 4;
316 READ32(dummy32);
317 READ_BUF(dummy32);
318 len += (XDR_QUADLEN(dummy32) << 2);
319 READMEM(buf, dummy32);
320 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
321 return status;
322 iattr->ia_valid |= ATTR_UID;
323 }
324 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
325 READ_BUF(4);
326 len += 4;
327 READ32(dummy32);
328 READ_BUF(dummy32);
329 len += (XDR_QUADLEN(dummy32) << 2);
330 READMEM(buf, dummy32);
331 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
332 return status;
333 iattr->ia_valid |= ATTR_GID;
334 }
335 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
336 READ_BUF(4);
337 len += 4;
338 READ32(dummy32);
339 switch (dummy32) {
340 case NFS4_SET_TO_CLIENT_TIME:
341 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
342 all 32 bits of 'nseconds'. */
343 READ_BUF(12);
344 len += 12;
345 READ32(dummy32);
346 if (dummy32)
347 return nfserr_inval;
348 READ32(iattr->ia_atime.tv_sec);
349 READ32(iattr->ia_atime.tv_nsec);
350 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
351 return nfserr_inval;
352 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
353 break;
354 case NFS4_SET_TO_SERVER_TIME:
355 iattr->ia_valid |= ATTR_ATIME;
356 break;
357 default:
358 goto xdr_error;
359 }
360 }
361 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
362 READ_BUF(4);
363 len += 4;
364 READ32(dummy32);
365 switch (dummy32) {
366 case NFS4_SET_TO_CLIENT_TIME:
367 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
368 all 32 bits of 'nseconds'. */
369 READ_BUF(12);
370 len += 12;
371 READ32(dummy32);
372 if (dummy32)
373 return nfserr_inval;
374 READ32(iattr->ia_mtime.tv_sec);
375 READ32(iattr->ia_mtime.tv_nsec);
376 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
377 return nfserr_inval;
378 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
379 break;
380 case NFS4_SET_TO_SERVER_TIME:
381 iattr->ia_valid |= ATTR_MTIME;
382 break;
383 default:
384 goto xdr_error;
385 }
386 }
387 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
388 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
389 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
390 READ_BUF(expected_len - len);
391 else if (len != expected_len)
392 goto xdr_error;
393
394 DECODE_TAIL;
395
396 out_nfserr:
397 status = nfserrno(host_err);
398 goto out;
399 }
400
401 static __be32
402 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
403 {
404 DECODE_HEAD;
405
406 READ_BUF(sizeof(stateid_t));
407 READ32(sid->si_generation);
408 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
409
410 DECODE_TAIL;
411 }
412
413 static __be32
414 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
415 {
416 DECODE_HEAD;
417
418 READ_BUF(4);
419 READ32(access->ac_req_access);
420
421 DECODE_TAIL;
422 }
423
424 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
425 {
426 DECODE_HEAD;
427 u32 dummy;
428
429 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
430 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
431 READ32(bcts->dir);
432 /* XXX: Perhaps Tom Tucker could help us figure out how we
433 * should be using ctsa_use_conn_in_rdma_mode: */
434 READ32(dummy);
435
436 DECODE_TAIL;
437 }
438
439 static __be32
440 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
441 {
442 DECODE_HEAD;
443
444 close->cl_stateowner = NULL;
445 READ_BUF(4);
446 READ32(close->cl_seqid);
447 return nfsd4_decode_stateid(argp, &close->cl_stateid);
448
449 DECODE_TAIL;
450 }
451
452
453 static __be32
454 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
455 {
456 DECODE_HEAD;
457
458 READ_BUF(12);
459 READ64(commit->co_offset);
460 READ32(commit->co_count);
461
462 DECODE_TAIL;
463 }
464
465 static __be32
466 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
467 {
468 DECODE_HEAD;
469
470 READ_BUF(4);
471 READ32(create->cr_type);
472 switch (create->cr_type) {
473 case NF4LNK:
474 READ_BUF(4);
475 READ32(create->cr_linklen);
476 READ_BUF(create->cr_linklen);
477 SAVEMEM(create->cr_linkname, create->cr_linklen);
478 break;
479 case NF4BLK:
480 case NF4CHR:
481 READ_BUF(8);
482 READ32(create->cr_specdata1);
483 READ32(create->cr_specdata2);
484 break;
485 case NF4SOCK:
486 case NF4FIFO:
487 case NF4DIR:
488 default:
489 break;
490 }
491
492 READ_BUF(4);
493 READ32(create->cr_namelen);
494 READ_BUF(create->cr_namelen);
495 SAVEMEM(create->cr_name, create->cr_namelen);
496 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
497 return status;
498
499 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
500 &create->cr_acl);
501 if (status)
502 goto out;
503
504 DECODE_TAIL;
505 }
506
507 static inline __be32
508 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
509 {
510 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
511 }
512
513 static inline __be32
514 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
515 {
516 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
517 }
518
519 static __be32
520 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
521 {
522 DECODE_HEAD;
523
524 READ_BUF(4);
525 READ32(link->li_namelen);
526 READ_BUF(link->li_namelen);
527 SAVEMEM(link->li_name, link->li_namelen);
528 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
529 return status;
530
531 DECODE_TAIL;
532 }
533
534 static __be32
535 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
536 {
537 DECODE_HEAD;
538
539 lock->lk_replay_owner = NULL;
540 /*
541 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
542 */
543 READ_BUF(28);
544 READ32(lock->lk_type);
545 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
546 goto xdr_error;
547 READ32(lock->lk_reclaim);
548 READ64(lock->lk_offset);
549 READ64(lock->lk_length);
550 READ32(lock->lk_is_new);
551
552 if (lock->lk_is_new) {
553 READ_BUF(4);
554 READ32(lock->lk_new_open_seqid);
555 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
556 if (status)
557 return status;
558 READ_BUF(8 + sizeof(clientid_t));
559 READ32(lock->lk_new_lock_seqid);
560 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
561 READ32(lock->lk_new_owner.len);
562 READ_BUF(lock->lk_new_owner.len);
563 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
564 } else {
565 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
566 if (status)
567 return status;
568 READ_BUF(4);
569 READ32(lock->lk_old_lock_seqid);
570 }
571
572 DECODE_TAIL;
573 }
574
575 static __be32
576 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
577 {
578 DECODE_HEAD;
579
580 READ_BUF(32);
581 READ32(lockt->lt_type);
582 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
583 goto xdr_error;
584 READ64(lockt->lt_offset);
585 READ64(lockt->lt_length);
586 COPYMEM(&lockt->lt_clientid, 8);
587 READ32(lockt->lt_owner.len);
588 READ_BUF(lockt->lt_owner.len);
589 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
590
591 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
592 return nfserr_inval;
593 DECODE_TAIL;
594 }
595
596 static __be32
597 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
598 {
599 DECODE_HEAD;
600
601 locku->lu_stateowner = NULL;
602 READ_BUF(8);
603 READ32(locku->lu_type);
604 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
605 goto xdr_error;
606 READ32(locku->lu_seqid);
607 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
608 if (status)
609 return status;
610 READ_BUF(16);
611 READ64(locku->lu_offset);
612 READ64(locku->lu_length);
613
614 DECODE_TAIL;
615 }
616
617 static __be32
618 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
619 {
620 DECODE_HEAD;
621
622 READ_BUF(4);
623 READ32(lookup->lo_len);
624 READ_BUF(lookup->lo_len);
625 SAVEMEM(lookup->lo_name, lookup->lo_len);
626 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
627 return status;
628
629 DECODE_TAIL;
630 }
631
632 static __be32
633 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
634 {
635 DECODE_HEAD;
636
637 memset(open->op_bmval, 0, sizeof(open->op_bmval));
638 open->op_iattr.ia_valid = 0;
639 open->op_stateowner = NULL;
640
641 /* seqid, share_access, share_deny, clientid, ownerlen */
642 READ_BUF(16 + sizeof(clientid_t));
643 READ32(open->op_seqid);
644 READ32(open->op_share_access);
645 READ32(open->op_share_deny);
646 COPYMEM(&open->op_clientid, sizeof(clientid_t));
647 READ32(open->op_owner.len);
648
649 /* owner, open_flag */
650 READ_BUF(open->op_owner.len + 4);
651 SAVEMEM(open->op_owner.data, open->op_owner.len);
652 READ32(open->op_create);
653 switch (open->op_create) {
654 case NFS4_OPEN_NOCREATE:
655 break;
656 case NFS4_OPEN_CREATE:
657 READ_BUF(4);
658 READ32(open->op_createmode);
659 switch (open->op_createmode) {
660 case NFS4_CREATE_UNCHECKED:
661 case NFS4_CREATE_GUARDED:
662 status = nfsd4_decode_fattr(argp, open->op_bmval,
663 &open->op_iattr, &open->op_acl);
664 if (status)
665 goto out;
666 break;
667 case NFS4_CREATE_EXCLUSIVE:
668 READ_BUF(8);
669 COPYMEM(open->op_verf.data, 8);
670 break;
671 case NFS4_CREATE_EXCLUSIVE4_1:
672 if (argp->minorversion < 1)
673 goto xdr_error;
674 READ_BUF(8);
675 COPYMEM(open->op_verf.data, 8);
676 status = nfsd4_decode_fattr(argp, open->op_bmval,
677 &open->op_iattr, &open->op_acl);
678 if (status)
679 goto out;
680 break;
681 default:
682 goto xdr_error;
683 }
684 break;
685 default:
686 goto xdr_error;
687 }
688
689 /* open_claim */
690 READ_BUF(4);
691 READ32(open->op_claim_type);
692 switch (open->op_claim_type) {
693 case NFS4_OPEN_CLAIM_NULL:
694 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
695 READ_BUF(4);
696 READ32(open->op_fname.len);
697 READ_BUF(open->op_fname.len);
698 SAVEMEM(open->op_fname.data, open->op_fname.len);
699 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
700 return status;
701 break;
702 case NFS4_OPEN_CLAIM_PREVIOUS:
703 READ_BUF(4);
704 READ32(open->op_delegate_type);
705 break;
706 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
707 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
708 if (status)
709 return status;
710 READ_BUF(4);
711 READ32(open->op_fname.len);
712 READ_BUF(open->op_fname.len);
713 SAVEMEM(open->op_fname.data, open->op_fname.len);
714 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
715 return status;
716 break;
717 default:
718 goto xdr_error;
719 }
720
721 DECODE_TAIL;
722 }
723
724 static __be32
725 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
726 {
727 DECODE_HEAD;
728
729 open_conf->oc_stateowner = NULL;
730 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
731 if (status)
732 return status;
733 READ_BUF(4);
734 READ32(open_conf->oc_seqid);
735
736 DECODE_TAIL;
737 }
738
739 static __be32
740 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
741 {
742 DECODE_HEAD;
743
744 open_down->od_stateowner = NULL;
745 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
746 if (status)
747 return status;
748 READ_BUF(12);
749 READ32(open_down->od_seqid);
750 READ32(open_down->od_share_access);
751 READ32(open_down->od_share_deny);
752
753 DECODE_TAIL;
754 }
755
756 static __be32
757 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
758 {
759 DECODE_HEAD;
760
761 READ_BUF(4);
762 READ32(putfh->pf_fhlen);
763 if (putfh->pf_fhlen > NFS4_FHSIZE)
764 goto xdr_error;
765 READ_BUF(putfh->pf_fhlen);
766 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
767
768 DECODE_TAIL;
769 }
770
771 static __be32
772 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
773 {
774 DECODE_HEAD;
775
776 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
777 if (status)
778 return status;
779 READ_BUF(12);
780 READ64(read->rd_offset);
781 READ32(read->rd_length);
782
783 DECODE_TAIL;
784 }
785
786 static __be32
787 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
788 {
789 DECODE_HEAD;
790
791 READ_BUF(24);
792 READ64(readdir->rd_cookie);
793 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
794 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
795 READ32(readdir->rd_maxcount);
796 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
797 goto out;
798
799 DECODE_TAIL;
800 }
801
802 static __be32
803 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
804 {
805 DECODE_HEAD;
806
807 READ_BUF(4);
808 READ32(remove->rm_namelen);
809 READ_BUF(remove->rm_namelen);
810 SAVEMEM(remove->rm_name, remove->rm_namelen);
811 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
812 return status;
813
814 DECODE_TAIL;
815 }
816
817 static __be32
818 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
819 {
820 DECODE_HEAD;
821
822 READ_BUF(4);
823 READ32(rename->rn_snamelen);
824 READ_BUF(rename->rn_snamelen + 4);
825 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
826 READ32(rename->rn_tnamelen);
827 READ_BUF(rename->rn_tnamelen);
828 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
829 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
830 return status;
831 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
832 return status;
833
834 DECODE_TAIL;
835 }
836
837 static __be32
838 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
839 {
840 DECODE_HEAD;
841
842 READ_BUF(sizeof(clientid_t));
843 COPYMEM(clientid, sizeof(clientid_t));
844
845 DECODE_TAIL;
846 }
847
848 static __be32
849 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
850 struct nfsd4_secinfo *secinfo)
851 {
852 DECODE_HEAD;
853
854 READ_BUF(4);
855 READ32(secinfo->si_namelen);
856 READ_BUF(secinfo->si_namelen);
857 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
858 status = check_filename(secinfo->si_name, secinfo->si_namelen,
859 nfserr_noent);
860 if (status)
861 return status;
862 DECODE_TAIL;
863 }
864
865 static __be32
866 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
867 struct nfsd4_secinfo_no_name *sin)
868 {
869 DECODE_HEAD;
870
871 READ_BUF(4);
872 READ32(sin->sin_style);
873 DECODE_TAIL;
874 }
875
876 static __be32
877 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
878 {
879 __be32 status;
880
881 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
882 if (status)
883 return status;
884 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
885 &setattr->sa_acl);
886 }
887
888 static __be32
889 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
890 {
891 DECODE_HEAD;
892
893 READ_BUF(12);
894 COPYMEM(setclientid->se_verf.data, 8);
895 READ32(setclientid->se_namelen);
896
897 READ_BUF(setclientid->se_namelen + 8);
898 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
899 READ32(setclientid->se_callback_prog);
900 READ32(setclientid->se_callback_netid_len);
901
902 READ_BUF(setclientid->se_callback_netid_len + 4);
903 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
904 READ32(setclientid->se_callback_addr_len);
905
906 READ_BUF(setclientid->se_callback_addr_len + 4);
907 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
908 READ32(setclientid->se_callback_ident);
909
910 DECODE_TAIL;
911 }
912
913 static __be32
914 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
915 {
916 DECODE_HEAD;
917
918 READ_BUF(8 + sizeof(nfs4_verifier));
919 COPYMEM(&scd_c->sc_clientid, 8);
920 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
921
922 DECODE_TAIL;
923 }
924
925 /* Also used for NVERIFY */
926 static __be32
927 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
928 {
929 #if 0
930 struct nfsd4_compoundargs save = {
931 .p = argp->p,
932 .end = argp->end,
933 .rqstp = argp->rqstp,
934 };
935 u32 ve_bmval[2];
936 struct iattr ve_iattr; /* request */
937 struct nfs4_acl *ve_acl; /* request */
938 #endif
939 DECODE_HEAD;
940
941 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
942 goto out;
943
944 /* For convenience's sake, we compare raw xdr'd attributes in
945 * nfsd4_proc_verify; however we still decode here just to return
946 * correct error in case of bad xdr. */
947 #if 0
948 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
949 if (status == nfserr_inval) {
950 status = nfserrno(status);
951 goto out;
952 }
953 #endif
954 READ_BUF(4);
955 READ32(verify->ve_attrlen);
956 READ_BUF(verify->ve_attrlen);
957 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
958
959 DECODE_TAIL;
960 }
961
962 static __be32
963 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
964 {
965 int avail;
966 int v;
967 int len;
968 DECODE_HEAD;
969
970 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
971 if (status)
972 return status;
973 READ_BUF(16);
974 READ64(write->wr_offset);
975 READ32(write->wr_stable_how);
976 if (write->wr_stable_how > 2)
977 goto xdr_error;
978 READ32(write->wr_buflen);
979
980 /* Sorry .. no magic macros for this.. *
981 * READ_BUF(write->wr_buflen);
982 * SAVEMEM(write->wr_buf, write->wr_buflen);
983 */
984 avail = (char*)argp->end - (char*)argp->p;
985 if (avail + argp->pagelen < write->wr_buflen) {
986 dprintk("NFSD: xdr error (%s:%d)\n",
987 __FILE__, __LINE__);
988 goto xdr_error;
989 }
990 argp->rqstp->rq_vec[0].iov_base = p;
991 argp->rqstp->rq_vec[0].iov_len = avail;
992 v = 0;
993 len = write->wr_buflen;
994 while (len > argp->rqstp->rq_vec[v].iov_len) {
995 len -= argp->rqstp->rq_vec[v].iov_len;
996 v++;
997 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
998 argp->pagelist++;
999 if (argp->pagelen >= PAGE_SIZE) {
1000 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1001 argp->pagelen -= PAGE_SIZE;
1002 } else {
1003 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1004 argp->pagelen -= len;
1005 }
1006 }
1007 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1008 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1009 argp->rqstp->rq_vec[v].iov_len = len;
1010 write->wr_vlen = v+1;
1011
1012 DECODE_TAIL;
1013 }
1014
1015 static __be32
1016 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1017 {
1018 DECODE_HEAD;
1019
1020 READ_BUF(12);
1021 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1022 READ32(rlockowner->rl_owner.len);
1023 READ_BUF(rlockowner->rl_owner.len);
1024 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1025
1026 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1027 return nfserr_inval;
1028 DECODE_TAIL;
1029 }
1030
1031 static __be32
1032 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1033 struct nfsd4_exchange_id *exid)
1034 {
1035 int dummy, tmp;
1036 DECODE_HEAD;
1037
1038 READ_BUF(NFS4_VERIFIER_SIZE);
1039 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1040
1041 READ_BUF(4);
1042 READ32(exid->clname.len);
1043
1044 READ_BUF(exid->clname.len);
1045 SAVEMEM(exid->clname.data, exid->clname.len);
1046
1047 READ_BUF(4);
1048 READ32(exid->flags);
1049
1050 /* Ignore state_protect4_a */
1051 READ_BUF(4);
1052 READ32(exid->spa_how);
1053 switch (exid->spa_how) {
1054 case SP4_NONE:
1055 break;
1056 case SP4_MACH_CRED:
1057 /* spo_must_enforce */
1058 READ_BUF(4);
1059 READ32(dummy);
1060 READ_BUF(dummy * 4);
1061 p += dummy;
1062
1063 /* spo_must_allow */
1064 READ_BUF(4);
1065 READ32(dummy);
1066 READ_BUF(dummy * 4);
1067 p += dummy;
1068 break;
1069 case SP4_SSV:
1070 /* ssp_ops */
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 READ_BUF(4);
1077 READ32(dummy);
1078 READ_BUF(dummy * 4);
1079 p += dummy;
1080
1081 /* ssp_hash_algs<> */
1082 READ_BUF(4);
1083 READ32(tmp);
1084 while (tmp--) {
1085 READ_BUF(4);
1086 READ32(dummy);
1087 READ_BUF(dummy);
1088 p += XDR_QUADLEN(dummy);
1089 }
1090
1091 /* ssp_encr_algs<> */
1092 READ_BUF(4);
1093 READ32(tmp);
1094 while (tmp--) {
1095 READ_BUF(4);
1096 READ32(dummy);
1097 READ_BUF(dummy);
1098 p += XDR_QUADLEN(dummy);
1099 }
1100
1101 /* ssp_window and ssp_num_gss_handles */
1102 READ_BUF(8);
1103 READ32(dummy);
1104 READ32(dummy);
1105 break;
1106 default:
1107 goto xdr_error;
1108 }
1109
1110 /* Ignore Implementation ID */
1111 READ_BUF(4); /* nfs_impl_id4 array length */
1112 READ32(dummy);
1113
1114 if (dummy > 1)
1115 goto xdr_error;
1116
1117 if (dummy == 1) {
1118 /* nii_domain */
1119 READ_BUF(4);
1120 READ32(dummy);
1121 READ_BUF(dummy);
1122 p += XDR_QUADLEN(dummy);
1123
1124 /* nii_name */
1125 READ_BUF(4);
1126 READ32(dummy);
1127 READ_BUF(dummy);
1128 p += XDR_QUADLEN(dummy);
1129
1130 /* nii_date */
1131 READ_BUF(12);
1132 p += 3;
1133 }
1134 DECODE_TAIL;
1135 }
1136
1137 static __be32
1138 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1139 struct nfsd4_create_session *sess)
1140 {
1141 DECODE_HEAD;
1142
1143 u32 dummy;
1144 char *machine_name;
1145 int i;
1146 int nr_secflavs;
1147
1148 READ_BUF(16);
1149 COPYMEM(&sess->clientid, 8);
1150 READ32(sess->seqid);
1151 READ32(sess->flags);
1152
1153 /* Fore channel attrs */
1154 READ_BUF(28);
1155 READ32(dummy); /* headerpadsz is always 0 */
1156 READ32(sess->fore_channel.maxreq_sz);
1157 READ32(sess->fore_channel.maxresp_sz);
1158 READ32(sess->fore_channel.maxresp_cached);
1159 READ32(sess->fore_channel.maxops);
1160 READ32(sess->fore_channel.maxreqs);
1161 READ32(sess->fore_channel.nr_rdma_attrs);
1162 if (sess->fore_channel.nr_rdma_attrs == 1) {
1163 READ_BUF(4);
1164 READ32(sess->fore_channel.rdma_attrs);
1165 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1166 dprintk("Too many fore channel attr bitmaps!\n");
1167 goto xdr_error;
1168 }
1169
1170 /* Back channel attrs */
1171 READ_BUF(28);
1172 READ32(dummy); /* headerpadsz is always 0 */
1173 READ32(sess->back_channel.maxreq_sz);
1174 READ32(sess->back_channel.maxresp_sz);
1175 READ32(sess->back_channel.maxresp_cached);
1176 READ32(sess->back_channel.maxops);
1177 READ32(sess->back_channel.maxreqs);
1178 READ32(sess->back_channel.nr_rdma_attrs);
1179 if (sess->back_channel.nr_rdma_attrs == 1) {
1180 READ_BUF(4);
1181 READ32(sess->back_channel.rdma_attrs);
1182 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1183 dprintk("Too many back channel attr bitmaps!\n");
1184 goto xdr_error;
1185 }
1186
1187 READ_BUF(8);
1188 READ32(sess->callback_prog);
1189
1190 /* callback_sec_params4 */
1191 READ32(nr_secflavs);
1192 for (i = 0; i < nr_secflavs; ++i) {
1193 READ_BUF(4);
1194 READ32(dummy);
1195 switch (dummy) {
1196 case RPC_AUTH_NULL:
1197 /* Nothing to read */
1198 break;
1199 case RPC_AUTH_UNIX:
1200 READ_BUF(8);
1201 /* stamp */
1202 READ32(dummy);
1203
1204 /* machine name */
1205 READ32(dummy);
1206 READ_BUF(dummy);
1207 SAVEMEM(machine_name, dummy);
1208
1209 /* uid, gid */
1210 READ_BUF(8);
1211 READ32(sess->uid);
1212 READ32(sess->gid);
1213
1214 /* more gids */
1215 READ_BUF(4);
1216 READ32(dummy);
1217 READ_BUF(dummy * 4);
1218 break;
1219 case RPC_AUTH_GSS:
1220 dprintk("RPC_AUTH_GSS callback secflavor "
1221 "not supported!\n");
1222 READ_BUF(8);
1223 /* gcbp_service */
1224 READ32(dummy);
1225 /* gcbp_handle_from_server */
1226 READ32(dummy);
1227 READ_BUF(dummy);
1228 p += XDR_QUADLEN(dummy);
1229 /* gcbp_handle_from_client */
1230 READ_BUF(4);
1231 READ32(dummy);
1232 READ_BUF(dummy);
1233 break;
1234 default:
1235 dprintk("Illegal callback secflavor\n");
1236 return nfserr_inval;
1237 }
1238 }
1239 DECODE_TAIL;
1240 }
1241
1242 static __be32
1243 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1244 struct nfsd4_destroy_session *destroy_session)
1245 {
1246 DECODE_HEAD;
1247 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1248 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1249
1250 DECODE_TAIL;
1251 }
1252
1253 static __be32
1254 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1255 struct nfsd4_sequence *seq)
1256 {
1257 DECODE_HEAD;
1258
1259 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1260 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1261 READ32(seq->seqid);
1262 READ32(seq->slotid);
1263 READ32(seq->maxslots);
1264 READ32(seq->cachethis);
1265
1266 DECODE_TAIL;
1267 }
1268
1269 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1270 {
1271 DECODE_HEAD;
1272
1273 READ_BUF(4);
1274 READ32(rc->rca_one_fs);
1275
1276 DECODE_TAIL;
1277 }
1278
1279 static __be32
1280 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1281 {
1282 return nfs_ok;
1283 }
1284
1285 static __be32
1286 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1287 {
1288 return nfserr_notsupp;
1289 }
1290
1291 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1292
1293 static nfsd4_dec nfsd4_dec_ops[] = {
1294 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1295 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1296 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1297 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1298 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1299 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1300 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1301 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1302 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1303 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1304 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1305 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1306 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1307 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1308 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1309 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1310 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1311 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1312 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1313 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1314 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1315 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1316 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1317 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1318 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1319 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1320 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1321 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1322 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1323 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1324 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1325 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1326 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1327 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1328 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1329 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1330 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1331 };
1332
1333 static nfsd4_dec nfsd41_dec_ops[] = {
1334 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1335 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1336 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1337 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1338 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1340 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1341 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1342 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1343 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1344 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1345 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1346 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1347 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1348 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1349 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1350 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1351 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1353 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1354 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1356 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1357 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1358 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1359 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1360 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1361 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1363 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1364 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1365 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1366 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1367 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1368 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1369 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1370 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1371
1372 /* new operations for NFSv4.1 */
1373 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1374 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1375 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1376 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1377 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1378 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1379 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1380 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1381 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1382 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1383 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1384 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1385 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1386 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1387 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1388 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1389 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1390 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1391 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1392 };
1393
1394 struct nfsd4_minorversion_ops {
1395 nfsd4_dec *decoders;
1396 int nops;
1397 };
1398
1399 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1400 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1401 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1402 };
1403
1404 static __be32
1405 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1406 {
1407 DECODE_HEAD;
1408 struct nfsd4_op *op;
1409 struct nfsd4_minorversion_ops *ops;
1410 int i;
1411
1412 /*
1413 * XXX: According to spec, we should check the tag
1414 * for UTF-8 compliance. I'm postponing this for
1415 * now because it seems that some clients do use
1416 * binary tags.
1417 */
1418 READ_BUF(4);
1419 READ32(argp->taglen);
1420 READ_BUF(argp->taglen + 8);
1421 SAVEMEM(argp->tag, argp->taglen);
1422 READ32(argp->minorversion);
1423 READ32(argp->opcnt);
1424
1425 if (argp->taglen > NFSD4_MAX_TAGLEN)
1426 goto xdr_error;
1427 if (argp->opcnt > 100)
1428 goto xdr_error;
1429
1430 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1431 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1432 if (!argp->ops) {
1433 argp->ops = argp->iops;
1434 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1435 goto xdr_error;
1436 }
1437 }
1438
1439 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1440 argp->opcnt = 0;
1441
1442 ops = &nfsd4_minorversion[argp->minorversion];
1443 for (i = 0; i < argp->opcnt; i++) {
1444 op = &argp->ops[i];
1445 op->replay = NULL;
1446
1447 /*
1448 * We can't use READ_BUF() here because we need to handle
1449 * a missing opcode as an OP_WRITE + 1. So we need to check
1450 * to see if we're truly at the end of our buffer or if there
1451 * is another page we need to flip to.
1452 */
1453
1454 if (argp->p == argp->end) {
1455 if (argp->pagelen < 4) {
1456 /* There isn't an opcode still on the wire */
1457 op->opnum = OP_WRITE + 1;
1458 op->status = nfserr_bad_xdr;
1459 argp->opcnt = i+1;
1460 break;
1461 }
1462
1463 /*
1464 * False alarm. We just hit a page boundary, but there
1465 * is still data available. Move pointer across page
1466 * boundary. *snip from READ_BUF*
1467 */
1468 argp->p = page_address(argp->pagelist[0]);
1469 argp->pagelist++;
1470 if (argp->pagelen < PAGE_SIZE) {
1471 argp->end = argp->p + (argp->pagelen>>2);
1472 argp->pagelen = 0;
1473 } else {
1474 argp->end = argp->p + (PAGE_SIZE>>2);
1475 argp->pagelen -= PAGE_SIZE;
1476 }
1477 }
1478 op->opnum = ntohl(*argp->p++);
1479
1480 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1481 op->status = ops->decoders[op->opnum](argp, &op->u);
1482 else {
1483 op->opnum = OP_ILLEGAL;
1484 op->status = nfserr_op_illegal;
1485 }
1486
1487 if (op->status) {
1488 argp->opcnt = i+1;
1489 break;
1490 }
1491 }
1492
1493 DECODE_TAIL;
1494 }
1495
1496 #define WRITE32(n) *p++ = htonl(n)
1497 #define WRITE64(n) do { \
1498 *p++ = htonl((u32)((n) >> 32)); \
1499 *p++ = htonl((u32)(n)); \
1500 } while (0)
1501 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1502 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1503 memcpy(p, ptr, nbytes); \
1504 p += XDR_QUADLEN(nbytes); \
1505 }} while (0)
1506
1507 static void write32(__be32 **p, u32 n)
1508 {
1509 *(*p)++ = n;
1510 }
1511
1512 static void write64(__be32 **p, u64 n)
1513 {
1514 write32(p, (u32)(n >> 32));
1515 write32(p, (u32)n);
1516 }
1517
1518 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1519 {
1520 if (IS_I_VERSION(inode)) {
1521 write64(p, inode->i_version);
1522 } else {
1523 write32(p, stat->ctime.tv_sec);
1524 write32(p, stat->ctime.tv_nsec);
1525 }
1526 }
1527
1528 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1529 {
1530 write32(p, c->atomic);
1531 if (c->change_supported) {
1532 write64(p, c->before_change);
1533 write64(p, c->after_change);
1534 } else {
1535 write32(p, c->before_ctime_sec);
1536 write32(p, c->before_ctime_nsec);
1537 write32(p, c->after_ctime_sec);
1538 write32(p, c->after_ctime_nsec);
1539 }
1540 }
1541
1542 #define RESERVE_SPACE(nbytes) do { \
1543 p = resp->p; \
1544 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1545 } while (0)
1546 #define ADJUST_ARGS() resp->p = p
1547
1548 /*
1549 * Header routine to setup seqid operation replay cache
1550 */
1551 #define ENCODE_SEQID_OP_HEAD \
1552 __be32 *save; \
1553 \
1554 save = resp->p;
1555
1556 /*
1557 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1558 * is where sequence id's are incremented, and the replay cache is filled.
1559 * Note that we increment sequence id's here, at the last moment, so we're sure
1560 * we know whether the error to be returned is a sequence id mutating error.
1561 */
1562
1563 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1564 if (seqid_mutating_err(nfserr) && stateowner) { \
1565 stateowner->so_seqid++; \
1566 stateowner->so_replay.rp_status = nfserr; \
1567 stateowner->so_replay.rp_buflen = \
1568 (((char *)(resp)->p - (char *)save)); \
1569 memcpy(stateowner->so_replay.rp_buf, save, \
1570 stateowner->so_replay.rp_buflen); \
1571 } } while (0);
1572
1573 /* Encode as an array of strings the string given with components
1574 * separated @sep.
1575 */
1576 static __be32 nfsd4_encode_components(char sep, char *components,
1577 __be32 **pp, int *buflen)
1578 {
1579 __be32 *p = *pp;
1580 __be32 *countp = p;
1581 int strlen, count=0;
1582 char *str, *end;
1583
1584 dprintk("nfsd4_encode_components(%s)\n", components);
1585 if ((*buflen -= 4) < 0)
1586 return nfserr_resource;
1587 WRITE32(0); /* We will fill this in with @count later */
1588 end = str = components;
1589 while (*end) {
1590 for (; *end && (*end != sep); end++)
1591 ; /* Point to end of component */
1592 strlen = end - str;
1593 if (strlen) {
1594 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1595 return nfserr_resource;
1596 WRITE32(strlen);
1597 WRITEMEM(str, strlen);
1598 count++;
1599 }
1600 else
1601 end++;
1602 str = end;
1603 }
1604 *pp = p;
1605 p = countp;
1606 WRITE32(count);
1607 return 0;
1608 }
1609
1610 /*
1611 * encode a location element of a fs_locations structure
1612 */
1613 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1614 __be32 **pp, int *buflen)
1615 {
1616 __be32 status;
1617 __be32 *p = *pp;
1618
1619 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1620 if (status)
1621 return status;
1622 status = nfsd4_encode_components('/', location->path, &p, buflen);
1623 if (status)
1624 return status;
1625 *pp = p;
1626 return 0;
1627 }
1628
1629 /*
1630 * Return the path to an export point in the pseudo filesystem namespace
1631 * Returned string is safe to use as long as the caller holds a reference
1632 * to @exp.
1633 */
1634 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1635 {
1636 struct svc_fh tmp_fh;
1637 char *path = NULL, *rootpath;
1638 size_t rootlen;
1639
1640 fh_init(&tmp_fh, NFS4_FHSIZE);
1641 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1642 if (*stat)
1643 return NULL;
1644 rootpath = tmp_fh.fh_export->ex_pathname;
1645
1646 path = exp->ex_pathname;
1647
1648 rootlen = strlen(rootpath);
1649 if (strncmp(path, rootpath, rootlen)) {
1650 dprintk("nfsd: fs_locations failed;"
1651 "%s is not contained in %s\n", path, rootpath);
1652 *stat = nfserr_notsupp;
1653 path = NULL;
1654 goto out;
1655 }
1656 path += rootlen;
1657 out:
1658 fh_put(&tmp_fh);
1659 return path;
1660 }
1661
1662 /*
1663 * encode a fs_locations structure
1664 */
1665 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1666 struct svc_export *exp,
1667 __be32 **pp, int *buflen)
1668 {
1669 __be32 status;
1670 int i;
1671 __be32 *p = *pp;
1672 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1673 char *root = nfsd4_path(rqstp, exp, &status);
1674
1675 if (status)
1676 return status;
1677 status = nfsd4_encode_components('/', root, &p, buflen);
1678 if (status)
1679 return status;
1680 if ((*buflen -= 4) < 0)
1681 return nfserr_resource;
1682 WRITE32(fslocs->locations_count);
1683 for (i=0; i<fslocs->locations_count; i++) {
1684 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1685 &p, buflen);
1686 if (status)
1687 return status;
1688 }
1689 *pp = p;
1690 return 0;
1691 }
1692
1693 static u32 nfs4_ftypes[16] = {
1694 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1695 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1696 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1697 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1698 };
1699
1700 static __be32
1701 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1702 __be32 **p, int *buflen)
1703 {
1704 int status;
1705
1706 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1707 return nfserr_resource;
1708 if (whotype != NFS4_ACL_WHO_NAMED)
1709 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1710 else if (group)
1711 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1712 else
1713 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1714 if (status < 0)
1715 return nfserrno(status);
1716 *p = xdr_encode_opaque(*p, NULL, status);
1717 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1718 BUG_ON(*buflen < 0);
1719 return 0;
1720 }
1721
1722 static inline __be32
1723 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1724 {
1725 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1726 }
1727
1728 static inline __be32
1729 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1730 {
1731 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1732 }
1733
1734 static inline __be32
1735 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1736 __be32 **p, int *buflen)
1737 {
1738 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1739 }
1740
1741 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1742 FATTR4_WORD0_RDATTR_ERROR)
1743 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1744
1745 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1746 {
1747 /* As per referral draft: */
1748 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1749 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1750 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1751 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1752 *rdattr_err = NFSERR_MOVED;
1753 else
1754 return nfserr_moved;
1755 }
1756 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1757 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1758 return 0;
1759 }
1760
1761 /*
1762 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1763 * ourselves.
1764 *
1765 * @countp is the buffer size in _words_; upon successful return this becomes
1766 * replaced with the number of words written.
1767 */
1768 __be32
1769 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1770 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1771 struct svc_rqst *rqstp, int ignore_crossmnt)
1772 {
1773 u32 bmval0 = bmval[0];
1774 u32 bmval1 = bmval[1];
1775 u32 bmval2 = bmval[2];
1776 struct kstat stat;
1777 struct svc_fh tempfh;
1778 struct kstatfs statfs;
1779 int buflen = *countp << 2;
1780 __be32 *attrlenp;
1781 u32 dummy;
1782 u64 dummy64;
1783 u32 rdattr_err = 0;
1784 __be32 *p = buffer;
1785 __be32 status;
1786 int err;
1787 int aclsupport = 0;
1788 struct nfs4_acl *acl = NULL;
1789 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1790 u32 minorversion = resp->cstate.minorversion;
1791 struct path path = {
1792 .mnt = exp->ex_path.mnt,
1793 .dentry = dentry,
1794 };
1795
1796 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1797 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1798 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1799 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1800
1801 if (exp->ex_fslocs.migrated) {
1802 BUG_ON(bmval[2]);
1803 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1804 if (status)
1805 goto out;
1806 }
1807
1808 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1809 if (err)
1810 goto out_nfserr;
1811 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1812 FATTR4_WORD0_MAXNAME)) ||
1813 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1814 FATTR4_WORD1_SPACE_TOTAL))) {
1815 err = vfs_statfs(&path, &statfs);
1816 if (err)
1817 goto out_nfserr;
1818 }
1819 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1820 fh_init(&tempfh, NFS4_FHSIZE);
1821 status = fh_compose(&tempfh, exp, dentry, NULL);
1822 if (status)
1823 goto out;
1824 fhp = &tempfh;
1825 }
1826 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1827 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1828 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1829 aclsupport = (err == 0);
1830 if (bmval0 & FATTR4_WORD0_ACL) {
1831 if (err == -EOPNOTSUPP)
1832 bmval0 &= ~FATTR4_WORD0_ACL;
1833 else if (err == -EINVAL) {
1834 status = nfserr_attrnotsupp;
1835 goto out;
1836 } else if (err != 0)
1837 goto out_nfserr;
1838 }
1839 }
1840
1841 if (bmval2) {
1842 if ((buflen -= 16) < 0)
1843 goto out_resource;
1844 WRITE32(3);
1845 WRITE32(bmval0);
1846 WRITE32(bmval1);
1847 WRITE32(bmval2);
1848 } else if (bmval1) {
1849 if ((buflen -= 12) < 0)
1850 goto out_resource;
1851 WRITE32(2);
1852 WRITE32(bmval0);
1853 WRITE32(bmval1);
1854 } else {
1855 if ((buflen -= 8) < 0)
1856 goto out_resource;
1857 WRITE32(1);
1858 WRITE32(bmval0);
1859 }
1860 attrlenp = p++; /* to be backfilled later */
1861
1862 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1863 u32 word0 = nfsd_suppattrs0(minorversion);
1864 u32 word1 = nfsd_suppattrs1(minorversion);
1865 u32 word2 = nfsd_suppattrs2(minorversion);
1866
1867 if (!aclsupport)
1868 word0 &= ~FATTR4_WORD0_ACL;
1869 if (!word2) {
1870 if ((buflen -= 12) < 0)
1871 goto out_resource;
1872 WRITE32(2);
1873 WRITE32(word0);
1874 WRITE32(word1);
1875 } else {
1876 if ((buflen -= 16) < 0)
1877 goto out_resource;
1878 WRITE32(3);
1879 WRITE32(word0);
1880 WRITE32(word1);
1881 WRITE32(word2);
1882 }
1883 }
1884 if (bmval0 & FATTR4_WORD0_TYPE) {
1885 if ((buflen -= 4) < 0)
1886 goto out_resource;
1887 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1888 if (dummy == NF4BAD)
1889 goto out_serverfault;
1890 WRITE32(dummy);
1891 }
1892 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1893 if ((buflen -= 4) < 0)
1894 goto out_resource;
1895 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1896 WRITE32(NFS4_FH_PERSISTENT);
1897 else
1898 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1899 }
1900 if (bmval0 & FATTR4_WORD0_CHANGE) {
1901 if ((buflen -= 8) < 0)
1902 goto out_resource;
1903 write_change(&p, &stat, dentry->d_inode);
1904 }
1905 if (bmval0 & FATTR4_WORD0_SIZE) {
1906 if ((buflen -= 8) < 0)
1907 goto out_resource;
1908 WRITE64(stat.size);
1909 }
1910 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1911 if ((buflen -= 4) < 0)
1912 goto out_resource;
1913 WRITE32(1);
1914 }
1915 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1916 if ((buflen -= 4) < 0)
1917 goto out_resource;
1918 WRITE32(1);
1919 }
1920 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1921 if ((buflen -= 4) < 0)
1922 goto out_resource;
1923 WRITE32(0);
1924 }
1925 if (bmval0 & FATTR4_WORD0_FSID) {
1926 if ((buflen -= 16) < 0)
1927 goto out_resource;
1928 if (exp->ex_fslocs.migrated) {
1929 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1930 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1931 } else switch(fsid_source(fhp)) {
1932 case FSIDSOURCE_FSID:
1933 WRITE64((u64)exp->ex_fsid);
1934 WRITE64((u64)0);
1935 break;
1936 case FSIDSOURCE_DEV:
1937 WRITE32(0);
1938 WRITE32(MAJOR(stat.dev));
1939 WRITE32(0);
1940 WRITE32(MINOR(stat.dev));
1941 break;
1942 case FSIDSOURCE_UUID:
1943 WRITEMEM(exp->ex_uuid, 16);
1944 break;
1945 }
1946 }
1947 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1948 if ((buflen -= 4) < 0)
1949 goto out_resource;
1950 WRITE32(0);
1951 }
1952 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1953 if ((buflen -= 4) < 0)
1954 goto out_resource;
1955 WRITE32(nfsd4_lease);
1956 }
1957 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1958 if ((buflen -= 4) < 0)
1959 goto out_resource;
1960 WRITE32(rdattr_err);
1961 }
1962 if (bmval0 & FATTR4_WORD0_ACL) {
1963 struct nfs4_ace *ace;
1964
1965 if (acl == NULL) {
1966 if ((buflen -= 4) < 0)
1967 goto out_resource;
1968
1969 WRITE32(0);
1970 goto out_acl;
1971 }
1972 if ((buflen -= 4) < 0)
1973 goto out_resource;
1974 WRITE32(acl->naces);
1975
1976 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1977 if ((buflen -= 4*3) < 0)
1978 goto out_resource;
1979 WRITE32(ace->type);
1980 WRITE32(ace->flag);
1981 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1982 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1983 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1984 &p, &buflen);
1985 if (status == nfserr_resource)
1986 goto out_resource;
1987 if (status)
1988 goto out;
1989 }
1990 }
1991 out_acl:
1992 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1993 if ((buflen -= 4) < 0)
1994 goto out_resource;
1995 WRITE32(aclsupport ?
1996 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1997 }
1998 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1999 if ((buflen -= 4) < 0)
2000 goto out_resource;
2001 WRITE32(1);
2002 }
2003 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2004 if ((buflen -= 4) < 0)
2005 goto out_resource;
2006 WRITE32(1);
2007 }
2008 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2009 if ((buflen -= 4) < 0)
2010 goto out_resource;
2011 WRITE32(1);
2012 }
2013 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2014 if ((buflen -= 4) < 0)
2015 goto out_resource;
2016 WRITE32(1);
2017 }
2018 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2019 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2020 if (buflen < 0)
2021 goto out_resource;
2022 WRITE32(fhp->fh_handle.fh_size);
2023 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2024 }
2025 if (bmval0 & FATTR4_WORD0_FILEID) {
2026 if ((buflen -= 8) < 0)
2027 goto out_resource;
2028 WRITE64(stat.ino);
2029 }
2030 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2031 if ((buflen -= 8) < 0)
2032 goto out_resource;
2033 WRITE64((u64) statfs.f_ffree);
2034 }
2035 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2036 if ((buflen -= 8) < 0)
2037 goto out_resource;
2038 WRITE64((u64) statfs.f_ffree);
2039 }
2040 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2041 if ((buflen -= 8) < 0)
2042 goto out_resource;
2043 WRITE64((u64) statfs.f_files);
2044 }
2045 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2046 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2047 if (status == nfserr_resource)
2048 goto out_resource;
2049 if (status)
2050 goto out;
2051 }
2052 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2053 if ((buflen -= 4) < 0)
2054 goto out_resource;
2055 WRITE32(1);
2056 }
2057 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2058 if ((buflen -= 8) < 0)
2059 goto out_resource;
2060 WRITE64(~(u64)0);
2061 }
2062 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2063 if ((buflen -= 4) < 0)
2064 goto out_resource;
2065 WRITE32(255);
2066 }
2067 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2068 if ((buflen -= 4) < 0)
2069 goto out_resource;
2070 WRITE32(statfs.f_namelen);
2071 }
2072 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2073 if ((buflen -= 8) < 0)
2074 goto out_resource;
2075 WRITE64((u64) svc_max_payload(rqstp));
2076 }
2077 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2078 if ((buflen -= 8) < 0)
2079 goto out_resource;
2080 WRITE64((u64) svc_max_payload(rqstp));
2081 }
2082 if (bmval1 & FATTR4_WORD1_MODE) {
2083 if ((buflen -= 4) < 0)
2084 goto out_resource;
2085 WRITE32(stat.mode & S_IALLUGO);
2086 }
2087 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2088 if ((buflen -= 4) < 0)
2089 goto out_resource;
2090 WRITE32(1);
2091 }
2092 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2093 if ((buflen -= 4) < 0)
2094 goto out_resource;
2095 WRITE32(stat.nlink);
2096 }
2097 if (bmval1 & FATTR4_WORD1_OWNER) {
2098 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2099 if (status == nfserr_resource)
2100 goto out_resource;
2101 if (status)
2102 goto out;
2103 }
2104 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2105 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2106 if (status == nfserr_resource)
2107 goto out_resource;
2108 if (status)
2109 goto out;
2110 }
2111 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2112 if ((buflen -= 8) < 0)
2113 goto out_resource;
2114 WRITE32((u32) MAJOR(stat.rdev));
2115 WRITE32((u32) MINOR(stat.rdev));
2116 }
2117 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2118 if ((buflen -= 8) < 0)
2119 goto out_resource;
2120 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2121 WRITE64(dummy64);
2122 }
2123 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2124 if ((buflen -= 8) < 0)
2125 goto out_resource;
2126 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2127 WRITE64(dummy64);
2128 }
2129 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2130 if ((buflen -= 8) < 0)
2131 goto out_resource;
2132 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2133 WRITE64(dummy64);
2134 }
2135 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2136 if ((buflen -= 8) < 0)
2137 goto out_resource;
2138 dummy64 = (u64)stat.blocks << 9;
2139 WRITE64(dummy64);
2140 }
2141 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2142 if ((buflen -= 12) < 0)
2143 goto out_resource;
2144 WRITE32(0);
2145 WRITE32(stat.atime.tv_sec);
2146 WRITE32(stat.atime.tv_nsec);
2147 }
2148 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2149 if ((buflen -= 12) < 0)
2150 goto out_resource;
2151 WRITE32(0);
2152 WRITE32(1);
2153 WRITE32(0);
2154 }
2155 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2156 if ((buflen -= 12) < 0)
2157 goto out_resource;
2158 WRITE32(0);
2159 WRITE32(stat.ctime.tv_sec);
2160 WRITE32(stat.ctime.tv_nsec);
2161 }
2162 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2163 if ((buflen -= 12) < 0)
2164 goto out_resource;
2165 WRITE32(0);
2166 WRITE32(stat.mtime.tv_sec);
2167 WRITE32(stat.mtime.tv_nsec);
2168 }
2169 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2170 if ((buflen -= 8) < 0)
2171 goto out_resource;
2172 /*
2173 * Get parent's attributes if not ignoring crossmount
2174 * and this is the root of a cross-mounted filesystem.
2175 */
2176 if (ignore_crossmnt == 0 &&
2177 dentry == exp->ex_path.mnt->mnt_root) {
2178 struct path path = exp->ex_path;
2179 path_get(&path);
2180 while (follow_up(&path)) {
2181 if (path.dentry != path.mnt->mnt_root)
2182 break;
2183 }
2184 err = vfs_getattr(path.mnt, path.dentry, &stat);
2185 path_put(&path);
2186 if (err)
2187 goto out_nfserr;
2188 }
2189 WRITE64(stat.ino);
2190 }
2191 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2192 WRITE32(3);
2193 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2194 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2195 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2196 }
2197
2198 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2199 *countp = p - buffer;
2200 status = nfs_ok;
2201
2202 out:
2203 kfree(acl);
2204 if (fhp == &tempfh)
2205 fh_put(&tempfh);
2206 return status;
2207 out_nfserr:
2208 status = nfserrno(err);
2209 goto out;
2210 out_resource:
2211 *countp = 0;
2212 status = nfserr_resource;
2213 goto out;
2214 out_serverfault:
2215 status = nfserr_serverfault;
2216 goto out;
2217 }
2218
2219 static inline int attributes_need_mount(u32 *bmval)
2220 {
2221 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2222 return 1;
2223 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2224 return 1;
2225 return 0;
2226 }
2227
2228 static __be32
2229 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2230 const char *name, int namlen, __be32 *p, int *buflen)
2231 {
2232 struct svc_export *exp = cd->rd_fhp->fh_export;
2233 struct dentry *dentry;
2234 __be32 nfserr;
2235 int ignore_crossmnt = 0;
2236
2237 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2238 if (IS_ERR(dentry))
2239 return nfserrno(PTR_ERR(dentry));
2240 if (!dentry->d_inode) {
2241 /*
2242 * nfsd_buffered_readdir drops the i_mutex between
2243 * readdir and calling this callback, leaving a window
2244 * where this directory entry could have gone away.
2245 */
2246 dput(dentry);
2247 return nfserr_noent;
2248 }
2249
2250 exp_get(exp);
2251 /*
2252 * In the case of a mountpoint, the client may be asking for
2253 * attributes that are only properties of the underlying filesystem
2254 * as opposed to the cross-mounted file system. In such a case,
2255 * we will not follow the cross mount and will fill the attribtutes
2256 * directly from the mountpoint dentry.
2257 */
2258 if (nfsd_mountpoint(dentry, exp)) {
2259 int err;
2260
2261 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2262 && !attributes_need_mount(cd->rd_bmval)) {
2263 ignore_crossmnt = 1;
2264 goto out_encode;
2265 }
2266 /*
2267 * Why the heck aren't we just using nfsd_lookup??
2268 * Different "."/".." handling? Something else?
2269 * At least, add a comment here to explain....
2270 */
2271 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2272 if (err) {
2273 nfserr = nfserrno(err);
2274 goto out_put;
2275 }
2276 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2277 if (nfserr)
2278 goto out_put;
2279
2280 }
2281 out_encode:
2282 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2283 cd->rd_rqstp, ignore_crossmnt);
2284 out_put:
2285 dput(dentry);
2286 exp_put(exp);
2287 return nfserr;
2288 }
2289
2290 static __be32 *
2291 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2292 {
2293 __be32 *attrlenp;
2294
2295 if (buflen < 6)
2296 return NULL;
2297 *p++ = htonl(2);
2298 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2299 *p++ = htonl(0); /* bmval1 */
2300
2301 attrlenp = p++;
2302 *p++ = nfserr; /* no htonl */
2303 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2304 return p;
2305 }
2306
2307 static int
2308 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2309 loff_t offset, u64 ino, unsigned int d_type)
2310 {
2311 struct readdir_cd *ccd = ccdv;
2312 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2313 int buflen;
2314 __be32 *p = cd->buffer;
2315 __be32 *cookiep;
2316 __be32 nfserr = nfserr_toosmall;
2317
2318 /* In nfsv4, "." and ".." never make it onto the wire.. */
2319 if (name && isdotent(name, namlen)) {
2320 cd->common.err = nfs_ok;
2321 return 0;
2322 }
2323
2324 if (cd->offset)
2325 xdr_encode_hyper(cd->offset, (u64) offset);
2326
2327 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2328 if (buflen < 0)
2329 goto fail;
2330
2331 *p++ = xdr_one; /* mark entry present */
2332 cookiep = p;
2333 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2334 p = xdr_encode_array(p, name, namlen); /* name length & name */
2335
2336 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2337 switch (nfserr) {
2338 case nfs_ok:
2339 p += buflen;
2340 break;
2341 case nfserr_resource:
2342 nfserr = nfserr_toosmall;
2343 goto fail;
2344 case nfserr_noent:
2345 goto skip_entry;
2346 default:
2347 /*
2348 * If the client requested the RDATTR_ERROR attribute,
2349 * we stuff the error code into this attribute
2350 * and continue. If this attribute was not requested,
2351 * then in accordance with the spec, we fail the
2352 * entire READDIR operation(!)
2353 */
2354 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2355 goto fail;
2356 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2357 if (p == NULL) {
2358 nfserr = nfserr_toosmall;
2359 goto fail;
2360 }
2361 }
2362 cd->buflen -= (p - cd->buffer);
2363 cd->buffer = p;
2364 cd->offset = cookiep;
2365 skip_entry:
2366 cd->common.err = nfs_ok;
2367 return 0;
2368 fail:
2369 cd->common.err = nfserr;
2370 return -EINVAL;
2371 }
2372
2373 static void
2374 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2375 {
2376 __be32 *p;
2377
2378 RESERVE_SPACE(sizeof(stateid_t));
2379 WRITE32(sid->si_generation);
2380 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2381 ADJUST_ARGS();
2382 }
2383
2384 static __be32
2385 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2386 {
2387 __be32 *p;
2388
2389 if (!nfserr) {
2390 RESERVE_SPACE(8);
2391 WRITE32(access->ac_supported);
2392 WRITE32(access->ac_resp_access);
2393 ADJUST_ARGS();
2394 }
2395 return nfserr;
2396 }
2397
2398 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2399 {
2400 __be32 *p;
2401
2402 if (!nfserr) {
2403 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2404 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2405 WRITE32(bcts->dir);
2406 /* XXX: ? */
2407 WRITE32(0);
2408 ADJUST_ARGS();
2409 }
2410 return nfserr;
2411 }
2412
2413 static __be32
2414 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2415 {
2416 ENCODE_SEQID_OP_HEAD;
2417
2418 if (!nfserr)
2419 nfsd4_encode_stateid(resp, &close->cl_stateid);
2420
2421 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2422 return nfserr;
2423 }
2424
2425
2426 static __be32
2427 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2428 {
2429 __be32 *p;
2430
2431 if (!nfserr) {
2432 RESERVE_SPACE(8);
2433 WRITEMEM(commit->co_verf.data, 8);
2434 ADJUST_ARGS();
2435 }
2436 return nfserr;
2437 }
2438
2439 static __be32
2440 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2441 {
2442 __be32 *p;
2443
2444 if (!nfserr) {
2445 RESERVE_SPACE(32);
2446 write_cinfo(&p, &create->cr_cinfo);
2447 WRITE32(2);
2448 WRITE32(create->cr_bmval[0]);
2449 WRITE32(create->cr_bmval[1]);
2450 ADJUST_ARGS();
2451 }
2452 return nfserr;
2453 }
2454
2455 static __be32
2456 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2457 {
2458 struct svc_fh *fhp = getattr->ga_fhp;
2459 int buflen;
2460
2461 if (nfserr)
2462 return nfserr;
2463
2464 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2465 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2466 resp->p, &buflen, getattr->ga_bmval,
2467 resp->rqstp, 0);
2468 if (!nfserr)
2469 resp->p += buflen;
2470 return nfserr;
2471 }
2472
2473 static __be32
2474 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2475 {
2476 struct svc_fh *fhp = *fhpp;
2477 unsigned int len;
2478 __be32 *p;
2479
2480 if (!nfserr) {
2481 len = fhp->fh_handle.fh_size;
2482 RESERVE_SPACE(len + 4);
2483 WRITE32(len);
2484 WRITEMEM(&fhp->fh_handle.fh_base, len);
2485 ADJUST_ARGS();
2486 }
2487 return nfserr;
2488 }
2489
2490 /*
2491 * Including all fields other than the name, a LOCK4denied structure requires
2492 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2493 */
2494 static void
2495 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2496 {
2497 __be32 *p;
2498
2499 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2500 WRITE64(ld->ld_start);
2501 WRITE64(ld->ld_length);
2502 WRITE32(ld->ld_type);
2503 if (ld->ld_sop) {
2504 WRITEMEM(&ld->ld_clientid, 8);
2505 WRITE32(ld->ld_sop->so_owner.len);
2506 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2507 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2508 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2509 WRITE64((u64)0); /* clientid */
2510 WRITE32(0); /* length of owner name */
2511 }
2512 ADJUST_ARGS();
2513 }
2514
2515 static __be32
2516 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2517 {
2518 ENCODE_SEQID_OP_HEAD;
2519
2520 if (!nfserr)
2521 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2522 else if (nfserr == nfserr_denied)
2523 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2524
2525 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2526 return nfserr;
2527 }
2528
2529 static __be32
2530 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2531 {
2532 if (nfserr == nfserr_denied)
2533 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2534 return nfserr;
2535 }
2536
2537 static __be32
2538 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2539 {
2540 ENCODE_SEQID_OP_HEAD;
2541
2542 if (!nfserr)
2543 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2544
2545 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2546 return nfserr;
2547 }
2548
2549
2550 static __be32
2551 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2552 {
2553 __be32 *p;
2554
2555 if (!nfserr) {
2556 RESERVE_SPACE(20);
2557 write_cinfo(&p, &link->li_cinfo);
2558 ADJUST_ARGS();
2559 }
2560 return nfserr;
2561 }
2562
2563
2564 static __be32
2565 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2566 {
2567 __be32 *p;
2568 ENCODE_SEQID_OP_HEAD;
2569
2570 if (nfserr)
2571 goto out;
2572
2573 nfsd4_encode_stateid(resp, &open->op_stateid);
2574 RESERVE_SPACE(40);
2575 write_cinfo(&p, &open->op_cinfo);
2576 WRITE32(open->op_rflags);
2577 WRITE32(2);
2578 WRITE32(open->op_bmval[0]);
2579 WRITE32(open->op_bmval[1]);
2580 WRITE32(open->op_delegate_type);
2581 ADJUST_ARGS();
2582
2583 switch (open->op_delegate_type) {
2584 case NFS4_OPEN_DELEGATE_NONE:
2585 break;
2586 case NFS4_OPEN_DELEGATE_READ:
2587 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2588 RESERVE_SPACE(20);
2589 WRITE32(open->op_recall);
2590
2591 /*
2592 * TODO: ACE's in delegations
2593 */
2594 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2595 WRITE32(0);
2596 WRITE32(0);
2597 WRITE32(0); /* XXX: is NULL principal ok? */
2598 ADJUST_ARGS();
2599 break;
2600 case NFS4_OPEN_DELEGATE_WRITE:
2601 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2602 RESERVE_SPACE(32);
2603 WRITE32(0);
2604
2605 /*
2606 * TODO: space_limit's in delegations
2607 */
2608 WRITE32(NFS4_LIMIT_SIZE);
2609 WRITE32(~(u32)0);
2610 WRITE32(~(u32)0);
2611
2612 /*
2613 * TODO: ACE's in delegations
2614 */
2615 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2616 WRITE32(0);
2617 WRITE32(0);
2618 WRITE32(0); /* XXX: is NULL principal ok? */
2619 ADJUST_ARGS();
2620 break;
2621 default:
2622 BUG();
2623 }
2624 /* XXX save filehandle here */
2625 out:
2626 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2627 return nfserr;
2628 }
2629
2630 static __be32
2631 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2632 {
2633 ENCODE_SEQID_OP_HEAD;
2634
2635 if (!nfserr)
2636 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2637
2638 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2639 return nfserr;
2640 }
2641
2642 static __be32
2643 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2644 {
2645 ENCODE_SEQID_OP_HEAD;
2646
2647 if (!nfserr)
2648 nfsd4_encode_stateid(resp, &od->od_stateid);
2649
2650 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2651 return nfserr;
2652 }
2653
2654 static __be32
2655 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2656 struct nfsd4_read *read)
2657 {
2658 u32 eof;
2659 int v, pn;
2660 unsigned long maxcount;
2661 long len;
2662 __be32 *p;
2663
2664 if (nfserr)
2665 return nfserr;
2666 if (resp->xbuf->page_len)
2667 return nfserr_resource;
2668
2669 RESERVE_SPACE(8); /* eof flag and byte count */
2670
2671 maxcount = svc_max_payload(resp->rqstp);
2672 if (maxcount > read->rd_length)
2673 maxcount = read->rd_length;
2674
2675 len = maxcount;
2676 v = 0;
2677 while (len > 0) {
2678 pn = resp->rqstp->rq_resused++;
2679 resp->rqstp->rq_vec[v].iov_base =
2680 page_address(resp->rqstp->rq_respages[pn]);
2681 resp->rqstp->rq_vec[v].iov_len =
2682 len < PAGE_SIZE ? len : PAGE_SIZE;
2683 v++;
2684 len -= PAGE_SIZE;
2685 }
2686 read->rd_vlen = v;
2687
2688 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2689 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2690 &maxcount);
2691
2692 if (nfserr == nfserr_symlink)
2693 nfserr = nfserr_inval;
2694 if (nfserr)
2695 return nfserr;
2696 eof = (read->rd_offset + maxcount >=
2697 read->rd_fhp->fh_dentry->d_inode->i_size);
2698
2699 WRITE32(eof);
2700 WRITE32(maxcount);
2701 ADJUST_ARGS();
2702 resp->xbuf->head[0].iov_len = (char*)p
2703 - (char*)resp->xbuf->head[0].iov_base;
2704 resp->xbuf->page_len = maxcount;
2705
2706 /* Use rest of head for padding and remaining ops: */
2707 resp->xbuf->tail[0].iov_base = p;
2708 resp->xbuf->tail[0].iov_len = 0;
2709 if (maxcount&3) {
2710 RESERVE_SPACE(4);
2711 WRITE32(0);
2712 resp->xbuf->tail[0].iov_base += maxcount&3;
2713 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2714 ADJUST_ARGS();
2715 }
2716 return 0;
2717 }
2718
2719 static __be32
2720 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2721 {
2722 int maxcount;
2723 char *page;
2724 __be32 *p;
2725
2726 if (nfserr)
2727 return nfserr;
2728 if (resp->xbuf->page_len)
2729 return nfserr_resource;
2730
2731 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2732
2733 maxcount = PAGE_SIZE;
2734 RESERVE_SPACE(4);
2735
2736 /*
2737 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2738 * if they would overflow the buffer. Is this kosher in NFSv4? If
2739 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2740 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2741 */
2742 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2743 if (nfserr == nfserr_isdir)
2744 return nfserr_inval;
2745 if (nfserr)
2746 return nfserr;
2747
2748 WRITE32(maxcount);
2749 ADJUST_ARGS();
2750 resp->xbuf->head[0].iov_len = (char*)p
2751 - (char*)resp->xbuf->head[0].iov_base;
2752 resp->xbuf->page_len = maxcount;
2753
2754 /* Use rest of head for padding and remaining ops: */
2755 resp->xbuf->tail[0].iov_base = p;
2756 resp->xbuf->tail[0].iov_len = 0;
2757 if (maxcount&3) {
2758 RESERVE_SPACE(4);
2759 WRITE32(0);
2760 resp->xbuf->tail[0].iov_base += maxcount&3;
2761 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2762 ADJUST_ARGS();
2763 }
2764 return 0;
2765 }
2766
2767 static __be32
2768 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2769 {
2770 int maxcount;
2771 loff_t offset;
2772 __be32 *page, *savep, *tailbase;
2773 __be32 *p;
2774
2775 if (nfserr)
2776 return nfserr;
2777 if (resp->xbuf->page_len)
2778 return nfserr_resource;
2779
2780 RESERVE_SPACE(8); /* verifier */
2781 savep = p;
2782
2783 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2784 WRITE32(0);
2785 WRITE32(0);
2786 ADJUST_ARGS();
2787 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2788 tailbase = p;
2789
2790 maxcount = PAGE_SIZE;
2791 if (maxcount > readdir->rd_maxcount)
2792 maxcount = readdir->rd_maxcount;
2793
2794 /*
2795 * Convert from bytes to words, account for the two words already
2796 * written, make sure to leave two words at the end for the next
2797 * pointer and eof field.
2798 */
2799 maxcount = (maxcount >> 2) - 4;
2800 if (maxcount < 0) {
2801 nfserr = nfserr_toosmall;
2802 goto err_no_verf;
2803 }
2804
2805 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2806 readdir->common.err = 0;
2807 readdir->buflen = maxcount;
2808 readdir->buffer = page;
2809 readdir->offset = NULL;
2810
2811 offset = readdir->rd_cookie;
2812 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2813 &offset,
2814 &readdir->common, nfsd4_encode_dirent);
2815 if (nfserr == nfs_ok &&
2816 readdir->common.err == nfserr_toosmall &&
2817 readdir->buffer == page)
2818 nfserr = nfserr_toosmall;
2819 if (nfserr == nfserr_symlink)
2820 nfserr = nfserr_notdir;
2821 if (nfserr)
2822 goto err_no_verf;
2823
2824 if (readdir->offset)
2825 xdr_encode_hyper(readdir->offset, offset);
2826
2827 p = readdir->buffer;
2828 *p++ = 0; /* no more entries */
2829 *p++ = htonl(readdir->common.err == nfserr_eof);
2830 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2831 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2832
2833 /* Use rest of head for padding and remaining ops: */
2834 resp->xbuf->tail[0].iov_base = tailbase;
2835 resp->xbuf->tail[0].iov_len = 0;
2836 resp->p = resp->xbuf->tail[0].iov_base;
2837 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2838
2839 return 0;
2840 err_no_verf:
2841 p = savep;
2842 ADJUST_ARGS();
2843 return nfserr;
2844 }
2845
2846 static __be32
2847 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2848 {
2849 __be32 *p;
2850
2851 if (!nfserr) {
2852 RESERVE_SPACE(20);
2853 write_cinfo(&p, &remove->rm_cinfo);
2854 ADJUST_ARGS();
2855 }
2856 return nfserr;
2857 }
2858
2859 static __be32
2860 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2861 {
2862 __be32 *p;
2863
2864 if (!nfserr) {
2865 RESERVE_SPACE(40);
2866 write_cinfo(&p, &rename->rn_sinfo);
2867 write_cinfo(&p, &rename->rn_tinfo);
2868 ADJUST_ARGS();
2869 }
2870 return nfserr;
2871 }
2872
2873 static __be32
2874 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2875 __be32 nfserr,struct svc_export *exp)
2876 {
2877 int i = 0;
2878 u32 nflavs;
2879 struct exp_flavor_info *flavs;
2880 struct exp_flavor_info def_flavs[2];
2881 __be32 *p;
2882
2883 if (nfserr)
2884 goto out;
2885 if (exp->ex_nflavors) {
2886 flavs = exp->ex_flavors;
2887 nflavs = exp->ex_nflavors;
2888 } else { /* Handling of some defaults in absence of real secinfo: */
2889 flavs = def_flavs;
2890 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2891 nflavs = 2;
2892 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2893 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2894 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2895 nflavs = 1;
2896 flavs[0].pseudoflavor
2897 = svcauth_gss_flavor(exp->ex_client);
2898 } else {
2899 nflavs = 1;
2900 flavs[0].pseudoflavor
2901 = exp->ex_client->flavour->flavour;
2902 }
2903 }
2904
2905 RESERVE_SPACE(4);
2906 WRITE32(nflavs);
2907 ADJUST_ARGS();
2908 for (i = 0; i < nflavs; i++) {
2909 u32 flav = flavs[i].pseudoflavor;
2910 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2911
2912 if (gm) {
2913 RESERVE_SPACE(4);
2914 WRITE32(RPC_AUTH_GSS);
2915 ADJUST_ARGS();
2916 RESERVE_SPACE(4 + gm->gm_oid.len);
2917 WRITE32(gm->gm_oid.len);
2918 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2919 ADJUST_ARGS();
2920 RESERVE_SPACE(4);
2921 WRITE32(0); /* qop */
2922 ADJUST_ARGS();
2923 RESERVE_SPACE(4);
2924 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2925 ADJUST_ARGS();
2926 gss_mech_put(gm);
2927 } else {
2928 RESERVE_SPACE(4);
2929 WRITE32(flav);
2930 ADJUST_ARGS();
2931 }
2932 }
2933 out:
2934 if (exp)
2935 exp_put(exp);
2936 return nfserr;
2937 }
2938
2939 static __be32
2940 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2941 struct nfsd4_secinfo *secinfo)
2942 {
2943 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
2944 }
2945
2946 static __be32
2947 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
2948 struct nfsd4_secinfo_no_name *secinfo)
2949 {
2950 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
2951 }
2952
2953 /*
2954 * The SETATTR encode routine is special -- it always encodes a bitmap,
2955 * regardless of the error status.
2956 */
2957 static __be32
2958 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2959 {
2960 __be32 *p;
2961
2962 RESERVE_SPACE(12);
2963 if (nfserr) {
2964 WRITE32(2);
2965 WRITE32(0);
2966 WRITE32(0);
2967 }
2968 else {
2969 WRITE32(2);
2970 WRITE32(setattr->sa_bmval[0]);
2971 WRITE32(setattr->sa_bmval[1]);
2972 }
2973 ADJUST_ARGS();
2974 return nfserr;
2975 }
2976
2977 static __be32
2978 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2979 {
2980 __be32 *p;
2981
2982 if (!nfserr) {
2983 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2984 WRITEMEM(&scd->se_clientid, 8);
2985 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2986 ADJUST_ARGS();
2987 }
2988 else if (nfserr == nfserr_clid_inuse) {
2989 RESERVE_SPACE(8);
2990 WRITE32(0);
2991 WRITE32(0);
2992 ADJUST_ARGS();
2993 }
2994 return nfserr;
2995 }
2996
2997 static __be32
2998 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2999 {
3000 __be32 *p;
3001
3002 if (!nfserr) {
3003 RESERVE_SPACE(16);
3004 WRITE32(write->wr_bytes_written);
3005 WRITE32(write->wr_how_written);
3006 WRITEMEM(write->wr_verifier.data, 8);
3007 ADJUST_ARGS();
3008 }
3009 return nfserr;
3010 }
3011
3012 static __be32
3013 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3014 struct nfsd4_exchange_id *exid)
3015 {
3016 __be32 *p;
3017 char *major_id;
3018 char *server_scope;
3019 int major_id_sz;
3020 int server_scope_sz;
3021 uint64_t minor_id = 0;
3022
3023 if (nfserr)
3024 return nfserr;
3025
3026 major_id = utsname()->nodename;
3027 major_id_sz = strlen(major_id);
3028 server_scope = utsname()->nodename;
3029 server_scope_sz = strlen(server_scope);
3030
3031 RESERVE_SPACE(
3032 8 /* eir_clientid */ +
3033 4 /* eir_sequenceid */ +
3034 4 /* eir_flags */ +
3035 4 /* spr_how (SP4_NONE) */ +
3036 8 /* so_minor_id */ +
3037 4 /* so_major_id.len */ +
3038 (XDR_QUADLEN(major_id_sz) * 4) +
3039 4 /* eir_server_scope.len */ +
3040 (XDR_QUADLEN(server_scope_sz) * 4) +
3041 4 /* eir_server_impl_id.count (0) */);
3042
3043 WRITEMEM(&exid->clientid, 8);
3044 WRITE32(exid->seqid);
3045 WRITE32(exid->flags);
3046
3047 /* state_protect4_r. Currently only support SP4_NONE */
3048 BUG_ON(exid->spa_how != SP4_NONE);
3049 WRITE32(exid->spa_how);
3050
3051 /* The server_owner struct */
3052 WRITE64(minor_id); /* Minor id */
3053 /* major id */
3054 WRITE32(major_id_sz);
3055 WRITEMEM(major_id, major_id_sz);
3056
3057 /* Server scope */
3058 WRITE32(server_scope_sz);
3059 WRITEMEM(server_scope, server_scope_sz);
3060
3061 /* Implementation id */
3062 WRITE32(0); /* zero length nfs_impl_id4 array */
3063 ADJUST_ARGS();
3064 return 0;
3065 }
3066
3067 static __be32
3068 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3069 struct nfsd4_create_session *sess)
3070 {
3071 __be32 *p;
3072
3073 if (nfserr)
3074 return nfserr;
3075
3076 RESERVE_SPACE(24);
3077 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3078 WRITE32(sess->seqid);
3079 WRITE32(sess->flags);
3080 ADJUST_ARGS();
3081
3082 RESERVE_SPACE(28);
3083 WRITE32(0); /* headerpadsz */
3084 WRITE32(sess->fore_channel.maxreq_sz);
3085 WRITE32(sess->fore_channel.maxresp_sz);
3086 WRITE32(sess->fore_channel.maxresp_cached);
3087 WRITE32(sess->fore_channel.maxops);
3088 WRITE32(sess->fore_channel.maxreqs);
3089 WRITE32(sess->fore_channel.nr_rdma_attrs);
3090 ADJUST_ARGS();
3091
3092 if (sess->fore_channel.nr_rdma_attrs) {
3093 RESERVE_SPACE(4);
3094 WRITE32(sess->fore_channel.rdma_attrs);
3095 ADJUST_ARGS();
3096 }
3097
3098 RESERVE_SPACE(28);
3099 WRITE32(0); /* headerpadsz */
3100 WRITE32(sess->back_channel.maxreq_sz);
3101 WRITE32(sess->back_channel.maxresp_sz);
3102 WRITE32(sess->back_channel.maxresp_cached);
3103 WRITE32(sess->back_channel.maxops);
3104 WRITE32(sess->back_channel.maxreqs);
3105 WRITE32(sess->back_channel.nr_rdma_attrs);
3106 ADJUST_ARGS();
3107
3108 if (sess->back_channel.nr_rdma_attrs) {
3109 RESERVE_SPACE(4);
3110 WRITE32(sess->back_channel.rdma_attrs);
3111 ADJUST_ARGS();
3112 }
3113 return 0;
3114 }
3115
3116 static __be32
3117 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3118 struct nfsd4_destroy_session *destroy_session)
3119 {
3120 return nfserr;
3121 }
3122
3123 __be32
3124 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3125 struct nfsd4_sequence *seq)
3126 {
3127 __be32 *p;
3128
3129 if (nfserr)
3130 return nfserr;
3131
3132 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3133 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3134 WRITE32(seq->seqid);
3135 WRITE32(seq->slotid);
3136 WRITE32(seq->maxslots);
3137 /* For now: target_maxslots = maxslots */
3138 WRITE32(seq->maxslots);
3139 WRITE32(seq->status_flags);
3140
3141 ADJUST_ARGS();
3142 resp->cstate.datap = p; /* DRC cache data pointer */
3143 return 0;
3144 }
3145
3146 static __be32
3147 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3148 {
3149 return nfserr;
3150 }
3151
3152 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3153
3154 /*
3155 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3156 * since we don't need to filter out obsolete ops as this is
3157 * done in the decoding phase.
3158 */
3159 static nfsd4_enc nfsd4_enc_ops[] = {
3160 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3161 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3162 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3163 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3164 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3165 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3166 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3167 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3168 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3169 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3170 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3171 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3172 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3173 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3174 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3175 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3176 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3177 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3178 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3179 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3180 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3181 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3182 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3183 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3184 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3185 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3186 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3187 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3188 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3189 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3190 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3191 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3192 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3193 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3194 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3195 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3196 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3197
3198 /* NFSv4.1 operations */
3199 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3200 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3201 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3202 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3203 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3204 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3205 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3206 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3207 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3208 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3209 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3210 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3211 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3212 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3213 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3214 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3215 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3216 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3217 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3218 };
3219
3220 /*
3221 * Calculate the total amount of memory that the compound response has taken
3222 * after encoding the current operation.
3223 *
3224 * pad: add on 8 bytes for the next operation's op_code and status so that
3225 * there is room to cache a failure on the next operation.
3226 *
3227 * Compare this length to the session se_fmaxresp_cached.
3228 *
3229 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3230 * will be at least a page and will therefore hold the xdr_buf head.
3231 */
3232 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3233 {
3234 int status = 0;
3235 struct xdr_buf *xb = &resp->rqstp->rq_res;
3236 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3237 struct nfsd4_session *session = NULL;
3238 struct nfsd4_slot *slot = resp->cstate.slot;
3239 u32 length, tlen = 0, pad = 8;
3240
3241 if (!nfsd4_has_session(&resp->cstate))
3242 return status;
3243
3244 session = resp->cstate.session;
3245 if (session == NULL || slot->sl_cachethis == 0)
3246 return status;
3247
3248 if (resp->opcnt >= args->opcnt)
3249 pad = 0; /* this is the last operation */
3250
3251 if (xb->page_len == 0) {
3252 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3253 } else {
3254 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3255 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3256
3257 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3258 }
3259 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3260 length, xb->page_len, tlen, pad);
3261
3262 if (length <= session->se_fchannel.maxresp_cached)
3263 return status;
3264 else
3265 return nfserr_rep_too_big_to_cache;
3266 }
3267
3268 void
3269 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3270 {
3271 __be32 *statp;
3272 __be32 *p;
3273
3274 RESERVE_SPACE(8);
3275 WRITE32(op->opnum);
3276 statp = p++; /* to be backfilled at the end */
3277 ADJUST_ARGS();
3278
3279 if (op->opnum == OP_ILLEGAL)
3280 goto status;
3281 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3282 !nfsd4_enc_ops[op->opnum]);
3283 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3284 /* nfsd4_check_drc_limit guarantees enough room for error status */
3285 if (!op->status && nfsd4_check_drc_limit(resp))
3286 op->status = nfserr_rep_too_big_to_cache;
3287 status:
3288 /*
3289 * Note: We write the status directly, instead of using WRITE32(),
3290 * since it is already in network byte order.
3291 */
3292 *statp = op->status;
3293 }
3294
3295 /*
3296 * Encode the reply stored in the stateowner reply cache
3297 *
3298 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3299 * previously sent already encoded operation.
3300 *
3301 * called with nfs4_lock_state() held
3302 */
3303 void
3304 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3305 {
3306 __be32 *p;
3307 struct nfs4_replay *rp = op->replay;
3308
3309 BUG_ON(!rp);
3310
3311 RESERVE_SPACE(8);
3312 WRITE32(op->opnum);
3313 *p++ = rp->rp_status; /* already xdr'ed */
3314 ADJUST_ARGS();
3315
3316 RESERVE_SPACE(rp->rp_buflen);
3317 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3318 ADJUST_ARGS();
3319 }
3320
3321 int
3322 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3323 {
3324 return xdr_ressize_check(rqstp, p);
3325 }
3326
3327 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3328 {
3329 if (args->ops != args->iops) {
3330 kfree(args->ops);
3331 args->ops = args->iops;
3332 }
3333 kfree(args->tmpp);
3334 args->tmpp = NULL;
3335 while (args->to_free) {
3336 struct tmpbuf *tb = args->to_free;
3337 args->to_free = tb->next;
3338 tb->release(tb->buf);
3339 kfree(tb);
3340 }
3341 }
3342
3343 int
3344 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3345 {
3346 __be32 status;
3347
3348 args->p = p;
3349 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3350 args->pagelist = rqstp->rq_arg.pages;
3351 args->pagelen = rqstp->rq_arg.page_len;
3352 args->tmpp = NULL;
3353 args->to_free = NULL;
3354 args->ops = args->iops;
3355 args->rqstp = rqstp;
3356
3357 status = nfsd4_decode_compound(args);
3358 if (status) {
3359 nfsd4_release_compoundargs(args);
3360 }
3361 return !status;
3362 }
3363
3364 int
3365 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3366 {
3367 /*
3368 * All that remains is to write the tag and operation count...
3369 */
3370 struct nfsd4_compound_state *cs = &resp->cstate;
3371 struct kvec *iov;
3372 p = resp->tagp;
3373 *p++ = htonl(resp->taglen);
3374 memcpy(p, resp->tag, resp->taglen);
3375 p += XDR_QUADLEN(resp->taglen);
3376 *p++ = htonl(resp->opcnt);
3377
3378 if (rqstp->rq_res.page_len)
3379 iov = &rqstp->rq_res.tail[0];
3380 else
3381 iov = &rqstp->rq_res.head[0];
3382 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3383 BUG_ON(iov->iov_len > PAGE_SIZE);
3384 if (nfsd4_has_session(cs)) {
3385 if (cs->status != nfserr_replay_cache) {
3386 nfsd4_store_cache_entry(resp);
3387 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3388 cs->slot->sl_inuse = false;
3389 }
3390 /* Renew the clientid on success and on replay */
3391 release_session_client(cs->session);
3392 nfsd4_put_session(cs->session);
3393 }
3394 return 1;
3395 }
3396
3397 /*
3398 * Local variables:
3399 * c-basic-offset: 8
3400 * End:
3401 */
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