projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
NFSD: Remove the ex_pathname field from struct svc_export
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
49
50 #include "idmap.h"
51 #include "acl.h"
52 #include "xdr4.h"
53 #include "vfs.h"
54 #include "state.h"
55 #include "cache.h"
56
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
58
59 /*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
67 static __be32
68 check_filename(char *str, int len, __be32 err)
69 {
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80 }
81
82 #define DECODE_HEAD \
83 __be32 *p; \
84 __be32 status
85 #define DECODE_TAIL \
86 status = 0; \
87 out: \
88 return status; \
89 xdr_error: \
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
93 goto out
94
95 #define READ32(x) (x) = ntohl(*p++)
96 #define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99 } while (0)
100 #define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104 } while (0)
105 #define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108 } while (0)
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118 } while (0)
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
132 goto xdr_error; \
133 } \
134 } while (0)
135
136 static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137 {
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142 }
143
144 static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145 {
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150 }
151
152 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
153 {
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
157 unsigned int avail = (char *)argp->end - (char *)argp->p;
158 __be32 *p;
159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
167 kfree(argp->tmpp);
168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
183 argp->end = argp->p + (argp->pagelen>>2);
184 argp->pagelen = 0;
185 } else {
186 argp->end = argp->p + (PAGE_SIZE>>2);
187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192 }
193
194 static int zero_clientid(clientid_t *clid)
195 {
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197 }
198
199 static int
200 defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202 {
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213 }
214
215 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
216 {
217 if (p == argp->tmp) {
218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
221 memcpy(p, argp->tmp, nbytes);
222 } else {
223 BUG_ON(p != argp->tmpp);
224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
227 kfree(p);
228 return NULL;
229 } else
230 return (char *)p;
231 }
232
233 static __be32
234 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235 {
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
241 bmval[2] = 0;
242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
253 if (bmlen > 2)
254 READ32(bmval[2]);
255
256 DECODE_TAIL;
257 }
258
259 static __be32
260 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
261 struct iattr *iattr, struct nfs4_acl **acl)
262 {
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
266 int host_err;
267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
283 int nace;
284 struct nfs4_ace *ace;
285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
293 if (*acl == NULL) {
294 host_err = -ENOMEM;
295 goto out_nfserr;
296 }
297 defer_free(argp, kfree, *acl);
298
299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
301 READ_BUF(16); len += 16;
302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 status = nfs_ok;
311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
314 status = nfsd_map_name_to_gid(argp->rqstp,
315 buf, dummy32, &ace->who);
316 else
317 status = nfsd_map_name_to_uid(argp->rqstp,
318 buf, dummy32, &ace->who);
319 if (status)
320 return status;
321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
410 goto xdr_error;
411
412 DECODE_TAIL;
413
414 out_nfserr:
415 status = nfserrno(host_err);
416 goto out;
417 }
418
419 static __be32
420 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421 {
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429 }
430
431 static __be32
432 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433 {
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440 }
441
442 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443 {
444 DECODE_HEAD;
445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
451 DECODE_TAIL;
452 }
453
454 static __be32
455 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456 {
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(close->cl_seqid);
461 return nfsd4_decode_stateid(argp, &close->cl_stateid);
462
463 DECODE_TAIL;
464 }
465
466
467 static __be32
468 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
469 {
470 DECODE_HEAD;
471
472 READ_BUF(12);
473 READ64(commit->co_offset);
474 READ32(commit->co_count);
475
476 DECODE_TAIL;
477 }
478
479 static __be32
480 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
481 {
482 DECODE_HEAD;
483
484 READ_BUF(4);
485 READ32(create->cr_type);
486 switch (create->cr_type) {
487 case NF4LNK:
488 READ_BUF(4);
489 READ32(create->cr_linklen);
490 READ_BUF(create->cr_linklen);
491 SAVEMEM(create->cr_linkname, create->cr_linklen);
492 break;
493 case NF4BLK:
494 case NF4CHR:
495 READ_BUF(8);
496 READ32(create->cr_specdata1);
497 READ32(create->cr_specdata2);
498 break;
499 case NF4SOCK:
500 case NF4FIFO:
501 case NF4DIR:
502 default:
503 break;
504 }
505
506 READ_BUF(4);
507 READ32(create->cr_namelen);
508 READ_BUF(create->cr_namelen);
509 SAVEMEM(create->cr_name, create->cr_namelen);
510 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
511 return status;
512
513 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
514 &create->cr_acl);
515 if (status)
516 goto out;
517
518 DECODE_TAIL;
519 }
520
521 static inline __be32
522 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
523 {
524 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
525 }
526
527 static inline __be32
528 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
529 {
530 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
531 }
532
533 static __be32
534 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
535 {
536 DECODE_HEAD;
537
538 READ_BUF(4);
539 READ32(link->li_namelen);
540 READ_BUF(link->li_namelen);
541 SAVEMEM(link->li_name, link->li_namelen);
542 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
543 return status;
544
545 DECODE_TAIL;
546 }
547
548 static __be32
549 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
550 {
551 DECODE_HEAD;
552
553 /*
554 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
555 */
556 READ_BUF(28);
557 READ32(lock->lk_type);
558 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
559 goto xdr_error;
560 READ32(lock->lk_reclaim);
561 READ64(lock->lk_offset);
562 READ64(lock->lk_length);
563 READ32(lock->lk_is_new);
564
565 if (lock->lk_is_new) {
566 READ_BUF(4);
567 READ32(lock->lk_new_open_seqid);
568 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
569 if (status)
570 return status;
571 READ_BUF(8 + sizeof(clientid_t));
572 READ32(lock->lk_new_lock_seqid);
573 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
574 READ32(lock->lk_new_owner.len);
575 READ_BUF(lock->lk_new_owner.len);
576 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
577 } else {
578 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
579 if (status)
580 return status;
581 READ_BUF(4);
582 READ32(lock->lk_old_lock_seqid);
583 }
584
585 DECODE_TAIL;
586 }
587
588 static __be32
589 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
590 {
591 DECODE_HEAD;
592
593 READ_BUF(32);
594 READ32(lockt->lt_type);
595 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
596 goto xdr_error;
597 READ64(lockt->lt_offset);
598 READ64(lockt->lt_length);
599 COPYMEM(&lockt->lt_clientid, 8);
600 READ32(lockt->lt_owner.len);
601 READ_BUF(lockt->lt_owner.len);
602 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
603
604 DECODE_TAIL;
605 }
606
607 static __be32
608 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
609 {
610 DECODE_HEAD;
611
612 READ_BUF(8);
613 READ32(locku->lu_type);
614 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
615 goto xdr_error;
616 READ32(locku->lu_seqid);
617 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
618 if (status)
619 return status;
620 READ_BUF(16);
621 READ64(locku->lu_offset);
622 READ64(locku->lu_length);
623
624 DECODE_TAIL;
625 }
626
627 static __be32
628 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
629 {
630 DECODE_HEAD;
631
632 READ_BUF(4);
633 READ32(lookup->lo_len);
634 READ_BUF(lookup->lo_len);
635 SAVEMEM(lookup->lo_name, lookup->lo_len);
636 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
637 return status;
638
639 DECODE_TAIL;
640 }
641
642 static __be32
643 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
644 {
645 DECODE_HEAD;
646
647 memset(open->op_bmval, 0, sizeof(open->op_bmval));
648 open->op_iattr.ia_valid = 0;
649 open->op_openowner = NULL;
650
651 /* seqid, share_access, share_deny, clientid, ownerlen */
652 READ_BUF(16 + sizeof(clientid_t));
653 READ32(open->op_seqid);
654 READ32(open->op_share_access);
655 READ32(open->op_share_deny);
656 COPYMEM(&open->op_clientid, sizeof(clientid_t));
657 READ32(open->op_owner.len);
658
659 /* owner, open_flag */
660 READ_BUF(open->op_owner.len + 4);
661 SAVEMEM(open->op_owner.data, open->op_owner.len);
662 READ32(open->op_create);
663 switch (open->op_create) {
664 case NFS4_OPEN_NOCREATE:
665 break;
666 case NFS4_OPEN_CREATE:
667 READ_BUF(4);
668 READ32(open->op_createmode);
669 switch (open->op_createmode) {
670 case NFS4_CREATE_UNCHECKED:
671 case NFS4_CREATE_GUARDED:
672 status = nfsd4_decode_fattr(argp, open->op_bmval,
673 &open->op_iattr, &open->op_acl);
674 if (status)
675 goto out;
676 break;
677 case NFS4_CREATE_EXCLUSIVE:
678 READ_BUF(8);
679 COPYMEM(open->op_verf.data, 8);
680 break;
681 case NFS4_CREATE_EXCLUSIVE4_1:
682 if (argp->minorversion < 1)
683 goto xdr_error;
684 READ_BUF(8);
685 COPYMEM(open->op_verf.data, 8);
686 status = nfsd4_decode_fattr(argp, open->op_bmval,
687 &open->op_iattr, &open->op_acl);
688 if (status)
689 goto out;
690 break;
691 default:
692 goto xdr_error;
693 }
694 break;
695 default:
696 goto xdr_error;
697 }
698
699 /* open_claim */
700 READ_BUF(4);
701 READ32(open->op_claim_type);
702 switch (open->op_claim_type) {
703 case NFS4_OPEN_CLAIM_NULL:
704 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
705 READ_BUF(4);
706 READ32(open->op_fname.len);
707 READ_BUF(open->op_fname.len);
708 SAVEMEM(open->op_fname.data, open->op_fname.len);
709 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
710 return status;
711 break;
712 case NFS4_OPEN_CLAIM_PREVIOUS:
713 READ_BUF(4);
714 READ32(open->op_delegate_type);
715 break;
716 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
717 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
718 if (status)
719 return status;
720 READ_BUF(4);
721 READ32(open->op_fname.len);
722 READ_BUF(open->op_fname.len);
723 SAVEMEM(open->op_fname.data, open->op_fname.len);
724 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
725 return status;
726 break;
727 default:
728 goto xdr_error;
729 }
730
731 DECODE_TAIL;
732 }
733
734 static __be32
735 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
736 {
737 DECODE_HEAD;
738
739 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
740 if (status)
741 return status;
742 READ_BUF(4);
743 READ32(open_conf->oc_seqid);
744
745 DECODE_TAIL;
746 }
747
748 static __be32
749 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
750 {
751 DECODE_HEAD;
752
753 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
754 if (status)
755 return status;
756 READ_BUF(12);
757 READ32(open_down->od_seqid);
758 READ32(open_down->od_share_access);
759 READ32(open_down->od_share_deny);
760
761 DECODE_TAIL;
762 }
763
764 static __be32
765 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
766 {
767 DECODE_HEAD;
768
769 READ_BUF(4);
770 READ32(putfh->pf_fhlen);
771 if (putfh->pf_fhlen > NFS4_FHSIZE)
772 goto xdr_error;
773 READ_BUF(putfh->pf_fhlen);
774 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
775
776 DECODE_TAIL;
777 }
778
779 static __be32
780 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
781 {
782 DECODE_HEAD;
783
784 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
785 if (status)
786 return status;
787 READ_BUF(12);
788 READ64(read->rd_offset);
789 READ32(read->rd_length);
790
791 DECODE_TAIL;
792 }
793
794 static __be32
795 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
796 {
797 DECODE_HEAD;
798
799 READ_BUF(24);
800 READ64(readdir->rd_cookie);
801 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
802 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
803 READ32(readdir->rd_maxcount);
804 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
805 goto out;
806
807 DECODE_TAIL;
808 }
809
810 static __be32
811 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
812 {
813 DECODE_HEAD;
814
815 READ_BUF(4);
816 READ32(remove->rm_namelen);
817 READ_BUF(remove->rm_namelen);
818 SAVEMEM(remove->rm_name, remove->rm_namelen);
819 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
820 return status;
821
822 DECODE_TAIL;
823 }
824
825 static __be32
826 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
827 {
828 DECODE_HEAD;
829
830 READ_BUF(4);
831 READ32(rename->rn_snamelen);
832 READ_BUF(rename->rn_snamelen + 4);
833 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
834 READ32(rename->rn_tnamelen);
835 READ_BUF(rename->rn_tnamelen);
836 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
837 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
838 return status;
839 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
840 return status;
841
842 DECODE_TAIL;
843 }
844
845 static __be32
846 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
847 {
848 DECODE_HEAD;
849
850 READ_BUF(sizeof(clientid_t));
851 COPYMEM(clientid, sizeof(clientid_t));
852
853 DECODE_TAIL;
854 }
855
856 static __be32
857 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
858 struct nfsd4_secinfo *secinfo)
859 {
860 DECODE_HEAD;
861
862 READ_BUF(4);
863 READ32(secinfo->si_namelen);
864 READ_BUF(secinfo->si_namelen);
865 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
866 status = check_filename(secinfo->si_name, secinfo->si_namelen,
867 nfserr_noent);
868 if (status)
869 return status;
870 DECODE_TAIL;
871 }
872
873 static __be32
874 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
875 struct nfsd4_secinfo_no_name *sin)
876 {
877 DECODE_HEAD;
878
879 READ_BUF(4);
880 READ32(sin->sin_style);
881 DECODE_TAIL;
882 }
883
884 static __be32
885 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
886 {
887 __be32 status;
888
889 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
890 if (status)
891 return status;
892 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
893 &setattr->sa_acl);
894 }
895
896 static __be32
897 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
898 {
899 DECODE_HEAD;
900
901 READ_BUF(12);
902 COPYMEM(setclientid->se_verf.data, 8);
903 READ32(setclientid->se_namelen);
904
905 READ_BUF(setclientid->se_namelen + 8);
906 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
907 READ32(setclientid->se_callback_prog);
908 READ32(setclientid->se_callback_netid_len);
909
910 READ_BUF(setclientid->se_callback_netid_len + 4);
911 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
912 READ32(setclientid->se_callback_addr_len);
913
914 READ_BUF(setclientid->se_callback_addr_len + 4);
915 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
916 READ32(setclientid->se_callback_ident);
917
918 DECODE_TAIL;
919 }
920
921 static __be32
922 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
923 {
924 DECODE_HEAD;
925
926 READ_BUF(8 + sizeof(nfs4_verifier));
927 COPYMEM(&scd_c->sc_clientid, 8);
928 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
929
930 DECODE_TAIL;
931 }
932
933 /* Also used for NVERIFY */
934 static __be32
935 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
936 {
937 #if 0
938 struct nfsd4_compoundargs save = {
939 .p = argp->p,
940 .end = argp->end,
941 .rqstp = argp->rqstp,
942 };
943 u32 ve_bmval[2];
944 struct iattr ve_iattr; /* request */
945 struct nfs4_acl *ve_acl; /* request */
946 #endif
947 DECODE_HEAD;
948
949 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
950 goto out;
951
952 /* For convenience's sake, we compare raw xdr'd attributes in
953 * nfsd4_proc_verify; however we still decode here just to return
954 * correct error in case of bad xdr. */
955 #if 0
956 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
957 if (status == nfserr_inval) {
958 status = nfserrno(status);
959 goto out;
960 }
961 #endif
962 READ_BUF(4);
963 READ32(verify->ve_attrlen);
964 READ_BUF(verify->ve_attrlen);
965 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
966
967 DECODE_TAIL;
968 }
969
970 static __be32
971 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
972 {
973 int avail;
974 int v;
975 int len;
976 DECODE_HEAD;
977
978 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
979 if (status)
980 return status;
981 READ_BUF(16);
982 READ64(write->wr_offset);
983 READ32(write->wr_stable_how);
984 if (write->wr_stable_how > 2)
985 goto xdr_error;
986 READ32(write->wr_buflen);
987
988 /* Sorry .. no magic macros for this.. *
989 * READ_BUF(write->wr_buflen);
990 * SAVEMEM(write->wr_buf, write->wr_buflen);
991 */
992 avail = (char*)argp->end - (char*)argp->p;
993 if (avail + argp->pagelen < write->wr_buflen) {
994 dprintk("NFSD: xdr error (%s:%d)\n",
995 __FILE__, __LINE__);
996 goto xdr_error;
997 }
998 argp->rqstp->rq_vec[0].iov_base = p;
999 argp->rqstp->rq_vec[0].iov_len = avail;
1000 v = 0;
1001 len = write->wr_buflen;
1002 while (len > argp->rqstp->rq_vec[v].iov_len) {
1003 len -= argp->rqstp->rq_vec[v].iov_len;
1004 v++;
1005 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1006 argp->pagelist++;
1007 if (argp->pagelen >= PAGE_SIZE) {
1008 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1009 argp->pagelen -= PAGE_SIZE;
1010 } else {
1011 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1012 argp->pagelen -= len;
1013 }
1014 }
1015 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1016 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1017 argp->rqstp->rq_vec[v].iov_len = len;
1018 write->wr_vlen = v+1;
1019
1020 DECODE_TAIL;
1021 }
1022
1023 static __be32
1024 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1025 {
1026 DECODE_HEAD;
1027
1028 READ_BUF(12);
1029 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1030 READ32(rlockowner->rl_owner.len);
1031 READ_BUF(rlockowner->rl_owner.len);
1032 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1033
1034 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1035 return nfserr_inval;
1036 DECODE_TAIL;
1037 }
1038
1039 static __be32
1040 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1041 struct nfsd4_exchange_id *exid)
1042 {
1043 int dummy, tmp;
1044 DECODE_HEAD;
1045
1046 READ_BUF(NFS4_VERIFIER_SIZE);
1047 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1048
1049 READ_BUF(4);
1050 READ32(exid->clname.len);
1051
1052 READ_BUF(exid->clname.len);
1053 SAVEMEM(exid->clname.data, exid->clname.len);
1054
1055 READ_BUF(4);
1056 READ32(exid->flags);
1057
1058 /* Ignore state_protect4_a */
1059 READ_BUF(4);
1060 READ32(exid->spa_how);
1061 switch (exid->spa_how) {
1062 case SP4_NONE:
1063 break;
1064 case SP4_MACH_CRED:
1065 /* spo_must_enforce */
1066 READ_BUF(4);
1067 READ32(dummy);
1068 READ_BUF(dummy * 4);
1069 p += dummy;
1070
1071 /* spo_must_allow */
1072 READ_BUF(4);
1073 READ32(dummy);
1074 READ_BUF(dummy * 4);
1075 p += dummy;
1076 break;
1077 case SP4_SSV:
1078 /* ssp_ops */
1079 READ_BUF(4);
1080 READ32(dummy);
1081 READ_BUF(dummy * 4);
1082 p += dummy;
1083
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy * 4);
1087 p += dummy;
1088
1089 /* ssp_hash_algs<> */
1090 READ_BUF(4);
1091 READ32(tmp);
1092 while (tmp--) {
1093 READ_BUF(4);
1094 READ32(dummy);
1095 READ_BUF(dummy);
1096 p += XDR_QUADLEN(dummy);
1097 }
1098
1099 /* ssp_encr_algs<> */
1100 READ_BUF(4);
1101 READ32(tmp);
1102 while (tmp--) {
1103 READ_BUF(4);
1104 READ32(dummy);
1105 READ_BUF(dummy);
1106 p += XDR_QUADLEN(dummy);
1107 }
1108
1109 /* ssp_window and ssp_num_gss_handles */
1110 READ_BUF(8);
1111 READ32(dummy);
1112 READ32(dummy);
1113 break;
1114 default:
1115 goto xdr_error;
1116 }
1117
1118 /* Ignore Implementation ID */
1119 READ_BUF(4); /* nfs_impl_id4 array length */
1120 READ32(dummy);
1121
1122 if (dummy > 1)
1123 goto xdr_error;
1124
1125 if (dummy == 1) {
1126 /* nii_domain */
1127 READ_BUF(4);
1128 READ32(dummy);
1129 READ_BUF(dummy);
1130 p += XDR_QUADLEN(dummy);
1131
1132 /* nii_name */
1133 READ_BUF(4);
1134 READ32(dummy);
1135 READ_BUF(dummy);
1136 p += XDR_QUADLEN(dummy);
1137
1138 /* nii_date */
1139 READ_BUF(12);
1140 p += 3;
1141 }
1142 DECODE_TAIL;
1143 }
1144
1145 static __be32
1146 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1147 struct nfsd4_create_session *sess)
1148 {
1149 DECODE_HEAD;
1150
1151 u32 dummy;
1152 char *machine_name;
1153 int i;
1154 int nr_secflavs;
1155
1156 READ_BUF(16);
1157 COPYMEM(&sess->clientid, 8);
1158 READ32(sess->seqid);
1159 READ32(sess->flags);
1160
1161 /* Fore channel attrs */
1162 READ_BUF(28);
1163 READ32(dummy); /* headerpadsz is always 0 */
1164 READ32(sess->fore_channel.maxreq_sz);
1165 READ32(sess->fore_channel.maxresp_sz);
1166 READ32(sess->fore_channel.maxresp_cached);
1167 READ32(sess->fore_channel.maxops);
1168 READ32(sess->fore_channel.maxreqs);
1169 READ32(sess->fore_channel.nr_rdma_attrs);
1170 if (sess->fore_channel.nr_rdma_attrs == 1) {
1171 READ_BUF(4);
1172 READ32(sess->fore_channel.rdma_attrs);
1173 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1174 dprintk("Too many fore channel attr bitmaps!\n");
1175 goto xdr_error;
1176 }
1177
1178 /* Back channel attrs */
1179 READ_BUF(28);
1180 READ32(dummy); /* headerpadsz is always 0 */
1181 READ32(sess->back_channel.maxreq_sz);
1182 READ32(sess->back_channel.maxresp_sz);
1183 READ32(sess->back_channel.maxresp_cached);
1184 READ32(sess->back_channel.maxops);
1185 READ32(sess->back_channel.maxreqs);
1186 READ32(sess->back_channel.nr_rdma_attrs);
1187 if (sess->back_channel.nr_rdma_attrs == 1) {
1188 READ_BUF(4);
1189 READ32(sess->back_channel.rdma_attrs);
1190 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1191 dprintk("Too many back channel attr bitmaps!\n");
1192 goto xdr_error;
1193 }
1194
1195 READ_BUF(8);
1196 READ32(sess->callback_prog);
1197
1198 /* callback_sec_params4 */
1199 READ32(nr_secflavs);
1200 for (i = 0; i < nr_secflavs; ++i) {
1201 READ_BUF(4);
1202 READ32(dummy);
1203 switch (dummy) {
1204 case RPC_AUTH_NULL:
1205 /* Nothing to read */
1206 break;
1207 case RPC_AUTH_UNIX:
1208 READ_BUF(8);
1209 /* stamp */
1210 READ32(dummy);
1211
1212 /* machine name */
1213 READ32(dummy);
1214 READ_BUF(dummy);
1215 SAVEMEM(machine_name, dummy);
1216
1217 /* uid, gid */
1218 READ_BUF(8);
1219 READ32(sess->uid);
1220 READ32(sess->gid);
1221
1222 /* more gids */
1223 READ_BUF(4);
1224 READ32(dummy);
1225 READ_BUF(dummy * 4);
1226 break;
1227 case RPC_AUTH_GSS:
1228 dprintk("RPC_AUTH_GSS callback secflavor "
1229 "not supported!\n");
1230 READ_BUF(8);
1231 /* gcbp_service */
1232 READ32(dummy);
1233 /* gcbp_handle_from_server */
1234 READ32(dummy);
1235 READ_BUF(dummy);
1236 p += XDR_QUADLEN(dummy);
1237 /* gcbp_handle_from_client */
1238 READ_BUF(4);
1239 READ32(dummy);
1240 READ_BUF(dummy);
1241 break;
1242 default:
1243 dprintk("Illegal callback secflavor\n");
1244 return nfserr_inval;
1245 }
1246 }
1247 DECODE_TAIL;
1248 }
1249
1250 static __be32
1251 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1252 struct nfsd4_destroy_session *destroy_session)
1253 {
1254 DECODE_HEAD;
1255 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1256 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1257
1258 DECODE_TAIL;
1259 }
1260
1261 static __be32
1262 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1263 struct nfsd4_free_stateid *free_stateid)
1264 {
1265 DECODE_HEAD;
1266
1267 READ_BUF(sizeof(stateid_t));
1268 READ32(free_stateid->fr_stateid.si_generation);
1269 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1270
1271 DECODE_TAIL;
1272 }
1273
1274 static __be32
1275 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1276 struct nfsd4_sequence *seq)
1277 {
1278 DECODE_HEAD;
1279
1280 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1281 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1282 READ32(seq->seqid);
1283 READ32(seq->slotid);
1284 READ32(seq->maxslots);
1285 READ32(seq->cachethis);
1286
1287 DECODE_TAIL;
1288 }
1289
1290 static __be32
1291 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1292 {
1293 unsigned int nbytes;
1294 stateid_t si;
1295 int i;
1296 __be32 *p;
1297 __be32 status;
1298
1299 READ_BUF(4);
1300 test_stateid->ts_num_ids = ntohl(*p++);
1301
1302 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1303 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1304 goto xdr_error;
1305
1306 test_stateid->ts_saved_args = argp;
1307 save_buf(argp, &test_stateid->ts_savedp);
1308
1309 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1310 status = nfsd4_decode_stateid(argp, &si);
1311 if (status)
1312 return status;
1313 }
1314
1315 status = 0;
1316 out:
1317 return status;
1318 xdr_error:
1319 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1320 status = nfserr_bad_xdr;
1321 goto out;
1322 }
1323
1324 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1325 {
1326 DECODE_HEAD;
1327
1328 READ_BUF(4);
1329 READ32(rc->rca_one_fs);
1330
1331 DECODE_TAIL;
1332 }
1333
1334 static __be32
1335 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1336 {
1337 return nfs_ok;
1338 }
1339
1340 static __be32
1341 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1342 {
1343 return nfserr_notsupp;
1344 }
1345
1346 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1347
1348 static nfsd4_dec nfsd4_dec_ops[] = {
1349 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1350 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1351 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1352 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1353 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1355 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1356 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1357 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1358 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1359 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1360 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1361 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1362 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1363 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1364 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1365 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1366 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1367 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1368 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1369 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1370 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1371 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1372 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1373 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1374 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1375 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1376 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1377 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1378 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1379 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1380 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1381 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1382 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1383 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1384 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1385 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1386 };
1387
1388 static nfsd4_dec nfsd41_dec_ops[] = {
1389 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1390 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1391 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1392 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1393 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1394 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1395 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1396 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1397 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1398 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1399 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1400 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1401 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1402 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1403 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1404 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1405 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1406 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1407 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1408 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1409 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1410 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1411 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1412 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1413 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1414 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1415 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1416 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1417 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1418 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1419 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1420 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1421 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1422 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1423 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1424 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1425 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1426
1427 /* new operations for NFSv4.1 */
1428 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1429 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1430 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1431 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1432 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1433 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1434 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1435 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1436 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1437 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1438 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1439 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1440 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1441 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1442 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1443 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1444 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1445 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1446 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1447 };
1448
1449 struct nfsd4_minorversion_ops {
1450 nfsd4_dec *decoders;
1451 int nops;
1452 };
1453
1454 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1455 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1456 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1457 };
1458
1459 static __be32
1460 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1461 {
1462 DECODE_HEAD;
1463 struct nfsd4_op *op;
1464 struct nfsd4_minorversion_ops *ops;
1465 bool cachethis = false;
1466 int i;
1467
1468 /*
1469 * XXX: According to spec, we should check the tag
1470 * for UTF-8 compliance. I'm postponing this for
1471 * now because it seems that some clients do use
1472 * binary tags.
1473 */
1474 READ_BUF(4);
1475 READ32(argp->taglen);
1476 READ_BUF(argp->taglen + 8);
1477 SAVEMEM(argp->tag, argp->taglen);
1478 READ32(argp->minorversion);
1479 READ32(argp->opcnt);
1480
1481 if (argp->taglen > NFSD4_MAX_TAGLEN)
1482 goto xdr_error;
1483 if (argp->opcnt > 100)
1484 goto xdr_error;
1485
1486 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1487 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1488 if (!argp->ops) {
1489 argp->ops = argp->iops;
1490 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1491 goto xdr_error;
1492 }
1493 }
1494
1495 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1496 argp->opcnt = 0;
1497
1498 ops = &nfsd4_minorversion[argp->minorversion];
1499 for (i = 0; i < argp->opcnt; i++) {
1500 op = &argp->ops[i];
1501 op->replay = NULL;
1502
1503 /*
1504 * We can't use READ_BUF() here because we need to handle
1505 * a missing opcode as an OP_WRITE + 1. So we need to check
1506 * to see if we're truly at the end of our buffer or if there
1507 * is another page we need to flip to.
1508 */
1509
1510 if (argp->p == argp->end) {
1511 if (argp->pagelen < 4) {
1512 /* There isn't an opcode still on the wire */
1513 op->opnum = OP_WRITE + 1;
1514 op->status = nfserr_bad_xdr;
1515 argp->opcnt = i+1;
1516 break;
1517 }
1518
1519 /*
1520 * False alarm. We just hit a page boundary, but there
1521 * is still data available. Move pointer across page
1522 * boundary. *snip from READ_BUF*
1523 */
1524 argp->p = page_address(argp->pagelist[0]);
1525 argp->pagelist++;
1526 if (argp->pagelen < PAGE_SIZE) {
1527 argp->end = argp->p + (argp->pagelen>>2);
1528 argp->pagelen = 0;
1529 } else {
1530 argp->end = argp->p + (PAGE_SIZE>>2);
1531 argp->pagelen -= PAGE_SIZE;
1532 }
1533 }
1534 op->opnum = ntohl(*argp->p++);
1535
1536 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1537 op->status = ops->decoders[op->opnum](argp, &op->u);
1538 else {
1539 op->opnum = OP_ILLEGAL;
1540 op->status = nfserr_op_illegal;
1541 }
1542
1543 if (op->status) {
1544 argp->opcnt = i+1;
1545 break;
1546 }
1547 /*
1548 * We'll try to cache the result in the DRC if any one
1549 * op in the compound wants to be cached:
1550 */
1551 cachethis |= nfsd4_cache_this_op(op);
1552 }
1553 /* Sessions make the DRC unnecessary: */
1554 if (argp->minorversion)
1555 cachethis = false;
1556 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1557
1558 DECODE_TAIL;
1559 }
1560
1561 #define WRITE32(n) *p++ = htonl(n)
1562 #define WRITE64(n) do { \
1563 *p++ = htonl((u32)((n) >> 32)); \
1564 *p++ = htonl((u32)(n)); \
1565 } while (0)
1566 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1567 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1568 memcpy(p, ptr, nbytes); \
1569 p += XDR_QUADLEN(nbytes); \
1570 }} while (0)
1571
1572 static void write32(__be32 **p, u32 n)
1573 {
1574 *(*p)++ = n;
1575 }
1576
1577 static void write64(__be32 **p, u64 n)
1578 {
1579 write32(p, (u32)(n >> 32));
1580 write32(p, (u32)n);
1581 }
1582
1583 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1584 {
1585 if (IS_I_VERSION(inode)) {
1586 write64(p, inode->i_version);
1587 } else {
1588 write32(p, stat->ctime.tv_sec);
1589 write32(p, stat->ctime.tv_nsec);
1590 }
1591 }
1592
1593 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1594 {
1595 write32(p, c->atomic);
1596 if (c->change_supported) {
1597 write64(p, c->before_change);
1598 write64(p, c->after_change);
1599 } else {
1600 write32(p, c->before_ctime_sec);
1601 write32(p, c->before_ctime_nsec);
1602 write32(p, c->after_ctime_sec);
1603 write32(p, c->after_ctime_nsec);
1604 }
1605 }
1606
1607 #define RESERVE_SPACE(nbytes) do { \
1608 p = resp->p; \
1609 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1610 } while (0)
1611 #define ADJUST_ARGS() resp->p = p
1612
1613 /*
1614 * Header routine to setup seqid operation replay cache
1615 */
1616 #define ENCODE_SEQID_OP_HEAD \
1617 __be32 *save; \
1618 \
1619 save = resp->p;
1620
1621 /*
1622 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1623 * is where sequence id's are incremented, and the replay cache is filled.
1624 * Note that we increment sequence id's here, at the last moment, so we're sure
1625 * we know whether the error to be returned is a sequence id mutating error.
1626 */
1627
1628 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1629 {
1630 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1631
1632 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1633 stateowner->so_seqid++;
1634 stateowner->so_replay.rp_status = nfserr;
1635 stateowner->so_replay.rp_buflen =
1636 (char *)resp->p - (char *)save;
1637 memcpy(stateowner->so_replay.rp_buf, save,
1638 stateowner->so_replay.rp_buflen);
1639 }
1640 }
1641
1642 /* Encode as an array of strings the string given with components
1643 * separated @sep.
1644 */
1645 static __be32 nfsd4_encode_components(char sep, char *components,
1646 __be32 **pp, int *buflen)
1647 {
1648 __be32 *p = *pp;
1649 __be32 *countp = p;
1650 int strlen, count=0;
1651 char *str, *end;
1652
1653 dprintk("nfsd4_encode_components(%s)\n", components);
1654 if ((*buflen -= 4) < 0)
1655 return nfserr_resource;
1656 WRITE32(0); /* We will fill this in with @count later */
1657 end = str = components;
1658 while (*end) {
1659 for (; *end && (*end != sep); end++)
1660 ; /* Point to end of component */
1661 strlen = end - str;
1662 if (strlen) {
1663 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1664 return nfserr_resource;
1665 WRITE32(strlen);
1666 WRITEMEM(str, strlen);
1667 count++;
1668 }
1669 else
1670 end++;
1671 str = end;
1672 }
1673 *pp = p;
1674 p = countp;
1675 WRITE32(count);
1676 return 0;
1677 }
1678
1679 /*
1680 * encode a location element of a fs_locations structure
1681 */
1682 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1683 __be32 **pp, int *buflen)
1684 {
1685 __be32 status;
1686 __be32 *p = *pp;
1687
1688 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1689 if (status)
1690 return status;
1691 status = nfsd4_encode_components('/', location->path, &p, buflen);
1692 if (status)
1693 return status;
1694 *pp = p;
1695 return 0;
1696 }
1697
1698 /*
1699 * Encode a path in RFC3530 'pathname4' format
1700 */
1701 static __be32 nfsd4_encode_path(const struct path *root,
1702 const struct path *path, __be32 **pp, int *buflen)
1703 {
1704 struct path cur = {
1705 .mnt = path->mnt,
1706 .dentry = path->dentry,
1707 };
1708 __be32 *p = *pp;
1709 struct dentry **components = NULL;
1710 unsigned int ncomponents = 0;
1711 __be32 err = nfserr_jukebox;
1712
1713 dprintk("nfsd4_encode_components(");
1714
1715 path_get(&cur);
1716 /* First walk the path up to the nfsd root, and store the
1717 * dentries/path components in an array.
1718 */
1719 for (;;) {
1720 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1721 break;
1722 if (cur.dentry == cur.mnt->mnt_root) {
1723 if (follow_up(&cur))
1724 continue;
1725 goto out_free;
1726 }
1727 if ((ncomponents & 15) == 0) {
1728 struct dentry **new;
1729 new = krealloc(components,
1730 sizeof(*new) * (ncomponents + 16),
1731 GFP_KERNEL);
1732 if (!new)
1733 goto out_free;
1734 components = new;
1735 }
1736 components[ncomponents++] = cur.dentry;
1737 cur.dentry = dget_parent(cur.dentry);
1738 }
1739
1740 *buflen -= 4;
1741 if (*buflen < 0)
1742 goto out_free;
1743 WRITE32(ncomponents);
1744
1745 while (ncomponents) {
1746 struct dentry *dentry = components[ncomponents - 1];
1747 unsigned int len = dentry->d_name.len;
1748
1749 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1750 if (*buflen < 0)
1751 goto out_free;
1752 WRITE32(len);
1753 WRITEMEM(dentry->d_name.name, len);
1754 dprintk("/%s", dentry->d_name.name);
1755 dput(dentry);
1756 ncomponents--;
1757 }
1758
1759 *pp = p;
1760 err = 0;
1761 out_free:
1762 dprintk(")\n");
1763 while (ncomponents)
1764 dput(components[--ncomponents]);
1765 kfree(components);
1766 path_put(&cur);
1767 return err;
1768 }
1769
1770 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1771 const struct path *path, __be32 **pp, int *buflen)
1772 {
1773 struct svc_export *exp_ps;
1774 __be32 res;
1775
1776 exp_ps = rqst_find_fsidzero_export(rqstp);
1777 if (IS_ERR(exp_ps))
1778 return nfserrno(PTR_ERR(exp_ps));
1779 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1780 exp_put(exp_ps);
1781 return res;
1782 }
1783
1784 /*
1785 * encode a fs_locations structure
1786 */
1787 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1788 struct svc_export *exp,
1789 __be32 **pp, int *buflen)
1790 {
1791 __be32 status;
1792 int i;
1793 __be32 *p = *pp;
1794 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1795
1796 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1797 if (status)
1798 return status;
1799 if ((*buflen -= 4) < 0)
1800 return nfserr_resource;
1801 WRITE32(fslocs->locations_count);
1802 for (i=0; i<fslocs->locations_count; i++) {
1803 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1804 &p, buflen);
1805 if (status)
1806 return status;
1807 }
1808 *pp = p;
1809 return 0;
1810 }
1811
1812 static u32 nfs4_file_type(umode_t mode)
1813 {
1814 switch (mode & S_IFMT) {
1815 case S_IFIFO: return NF4FIFO;
1816 case S_IFCHR: return NF4CHR;
1817 case S_IFDIR: return NF4DIR;
1818 case S_IFBLK: return NF4BLK;
1819 case S_IFLNK: return NF4LNK;
1820 case S_IFREG: return NF4REG;
1821 case S_IFSOCK: return NF4SOCK;
1822 default: return NF4BAD;
1823 };
1824 }
1825
1826 static __be32
1827 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1828 __be32 **p, int *buflen)
1829 {
1830 int status;
1831
1832 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1833 return nfserr_resource;
1834 if (whotype != NFS4_ACL_WHO_NAMED)
1835 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1836 else if (group)
1837 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1838 else
1839 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1840 if (status < 0)
1841 return nfserrno(status);
1842 *p = xdr_encode_opaque(*p, NULL, status);
1843 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1844 BUG_ON(*buflen < 0);
1845 return 0;
1846 }
1847
1848 static inline __be32
1849 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1850 {
1851 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1852 }
1853
1854 static inline __be32
1855 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1856 {
1857 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1858 }
1859
1860 static inline __be32
1861 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1862 __be32 **p, int *buflen)
1863 {
1864 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1865 }
1866
1867 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1868 FATTR4_WORD0_RDATTR_ERROR)
1869 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1870
1871 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1872 {
1873 /* As per referral draft: */
1874 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1875 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1876 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1877 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1878 *rdattr_err = NFSERR_MOVED;
1879 else
1880 return nfserr_moved;
1881 }
1882 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1883 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1884 return 0;
1885 }
1886
1887 /*
1888 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1889 * ourselves.
1890 *
1891 * @countp is the buffer size in _words_; upon successful return this becomes
1892 * replaced with the number of words written.
1893 */
1894 __be32
1895 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1896 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1897 struct svc_rqst *rqstp, int ignore_crossmnt)
1898 {
1899 u32 bmval0 = bmval[0];
1900 u32 bmval1 = bmval[1];
1901 u32 bmval2 = bmval[2];
1902 struct kstat stat;
1903 struct svc_fh tempfh;
1904 struct kstatfs statfs;
1905 int buflen = *countp << 2;
1906 __be32 *attrlenp;
1907 u32 dummy;
1908 u64 dummy64;
1909 u32 rdattr_err = 0;
1910 __be32 *p = buffer;
1911 __be32 status;
1912 int err;
1913 int aclsupport = 0;
1914 struct nfs4_acl *acl = NULL;
1915 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1916 u32 minorversion = resp->cstate.minorversion;
1917 struct path path = {
1918 .mnt = exp->ex_path.mnt,
1919 .dentry = dentry,
1920 };
1921
1922 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1923 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1924 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1925 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1926
1927 if (exp->ex_fslocs.migrated) {
1928 BUG_ON(bmval[2]);
1929 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1930 if (status)
1931 goto out;
1932 }
1933
1934 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1935 if (err)
1936 goto out_nfserr;
1937 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1938 FATTR4_WORD0_MAXNAME)) ||
1939 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1940 FATTR4_WORD1_SPACE_TOTAL))) {
1941 err = vfs_statfs(&path, &statfs);
1942 if (err)
1943 goto out_nfserr;
1944 }
1945 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1946 fh_init(&tempfh, NFS4_FHSIZE);
1947 status = fh_compose(&tempfh, exp, dentry, NULL);
1948 if (status)
1949 goto out;
1950 fhp = &tempfh;
1951 }
1952 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1953 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1954 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1955 aclsupport = (err == 0);
1956 if (bmval0 & FATTR4_WORD0_ACL) {
1957 if (err == -EOPNOTSUPP)
1958 bmval0 &= ~FATTR4_WORD0_ACL;
1959 else if (err == -EINVAL) {
1960 status = nfserr_attrnotsupp;
1961 goto out;
1962 } else if (err != 0)
1963 goto out_nfserr;
1964 }
1965 }
1966
1967 if (bmval2) {
1968 if ((buflen -= 16) < 0)
1969 goto out_resource;
1970 WRITE32(3);
1971 WRITE32(bmval0);
1972 WRITE32(bmval1);
1973 WRITE32(bmval2);
1974 } else if (bmval1) {
1975 if ((buflen -= 12) < 0)
1976 goto out_resource;
1977 WRITE32(2);
1978 WRITE32(bmval0);
1979 WRITE32(bmval1);
1980 } else {
1981 if ((buflen -= 8) < 0)
1982 goto out_resource;
1983 WRITE32(1);
1984 WRITE32(bmval0);
1985 }
1986 attrlenp = p++; /* to be backfilled later */
1987
1988 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1989 u32 word0 = nfsd_suppattrs0(minorversion);
1990 u32 word1 = nfsd_suppattrs1(minorversion);
1991 u32 word2 = nfsd_suppattrs2(minorversion);
1992
1993 if (!aclsupport)
1994 word0 &= ~FATTR4_WORD0_ACL;
1995 if (!word2) {
1996 if ((buflen -= 12) < 0)
1997 goto out_resource;
1998 WRITE32(2);
1999 WRITE32(word0);
2000 WRITE32(word1);
2001 } else {
2002 if ((buflen -= 16) < 0)
2003 goto out_resource;
2004 WRITE32(3);
2005 WRITE32(word0);
2006 WRITE32(word1);
2007 WRITE32(word2);
2008 }
2009 }
2010 if (bmval0 & FATTR4_WORD0_TYPE) {
2011 if ((buflen -= 4) < 0)
2012 goto out_resource;
2013 dummy = nfs4_file_type(stat.mode);
2014 if (dummy == NF4BAD)
2015 goto out_serverfault;
2016 WRITE32(dummy);
2017 }
2018 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2019 if ((buflen -= 4) < 0)
2020 goto out_resource;
2021 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2022 WRITE32(NFS4_FH_PERSISTENT);
2023 else
2024 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2025 }
2026 if (bmval0 & FATTR4_WORD0_CHANGE) {
2027 if ((buflen -= 8) < 0)
2028 goto out_resource;
2029 write_change(&p, &stat, dentry->d_inode);
2030 }
2031 if (bmval0 & FATTR4_WORD0_SIZE) {
2032 if ((buflen -= 8) < 0)
2033 goto out_resource;
2034 WRITE64(stat.size);
2035 }
2036 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2037 if ((buflen -= 4) < 0)
2038 goto out_resource;
2039 WRITE32(1);
2040 }
2041 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2042 if ((buflen -= 4) < 0)
2043 goto out_resource;
2044 WRITE32(1);
2045 }
2046 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2047 if ((buflen -= 4) < 0)
2048 goto out_resource;
2049 WRITE32(0);
2050 }
2051 if (bmval0 & FATTR4_WORD0_FSID) {
2052 if ((buflen -= 16) < 0)
2053 goto out_resource;
2054 if (exp->ex_fslocs.migrated) {
2055 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2056 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2057 } else switch(fsid_source(fhp)) {
2058 case FSIDSOURCE_FSID:
2059 WRITE64((u64)exp->ex_fsid);
2060 WRITE64((u64)0);
2061 break;
2062 case FSIDSOURCE_DEV:
2063 WRITE32(0);
2064 WRITE32(MAJOR(stat.dev));
2065 WRITE32(0);
2066 WRITE32(MINOR(stat.dev));
2067 break;
2068 case FSIDSOURCE_UUID:
2069 WRITEMEM(exp->ex_uuid, 16);
2070 break;
2071 }
2072 }
2073 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2074 if ((buflen -= 4) < 0)
2075 goto out_resource;
2076 WRITE32(0);
2077 }
2078 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2079 if ((buflen -= 4) < 0)
2080 goto out_resource;
2081 WRITE32(nfsd4_lease);
2082 }
2083 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2084 if ((buflen -= 4) < 0)
2085 goto out_resource;
2086 WRITE32(rdattr_err);
2087 }
2088 if (bmval0 & FATTR4_WORD0_ACL) {
2089 struct nfs4_ace *ace;
2090
2091 if (acl == NULL) {
2092 if ((buflen -= 4) < 0)
2093 goto out_resource;
2094
2095 WRITE32(0);
2096 goto out_acl;
2097 }
2098 if ((buflen -= 4) < 0)
2099 goto out_resource;
2100 WRITE32(acl->naces);
2101
2102 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2103 if ((buflen -= 4*3) < 0)
2104 goto out_resource;
2105 WRITE32(ace->type);
2106 WRITE32(ace->flag);
2107 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2108 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2109 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2110 &p, &buflen);
2111 if (status == nfserr_resource)
2112 goto out_resource;
2113 if (status)
2114 goto out;
2115 }
2116 }
2117 out_acl:
2118 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2119 if ((buflen -= 4) < 0)
2120 goto out_resource;
2121 WRITE32(aclsupport ?
2122 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2123 }
2124 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2125 if ((buflen -= 4) < 0)
2126 goto out_resource;
2127 WRITE32(1);
2128 }
2129 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2130 if ((buflen -= 4) < 0)
2131 goto out_resource;
2132 WRITE32(1);
2133 }
2134 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2135 if ((buflen -= 4) < 0)
2136 goto out_resource;
2137 WRITE32(1);
2138 }
2139 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2140 if ((buflen -= 4) < 0)
2141 goto out_resource;
2142 WRITE32(1);
2143 }
2144 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2145 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2146 if (buflen < 0)
2147 goto out_resource;
2148 WRITE32(fhp->fh_handle.fh_size);
2149 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2150 }
2151 if (bmval0 & FATTR4_WORD0_FILEID) {
2152 if ((buflen -= 8) < 0)
2153 goto out_resource;
2154 WRITE64(stat.ino);
2155 }
2156 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2157 if ((buflen -= 8) < 0)
2158 goto out_resource;
2159 WRITE64((u64) statfs.f_ffree);
2160 }
2161 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2162 if ((buflen -= 8) < 0)
2163 goto out_resource;
2164 WRITE64((u64) statfs.f_ffree);
2165 }
2166 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2167 if ((buflen -= 8) < 0)
2168 goto out_resource;
2169 WRITE64((u64) statfs.f_files);
2170 }
2171 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2172 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2173 if (status == nfserr_resource)
2174 goto out_resource;
2175 if (status)
2176 goto out;
2177 }
2178 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2179 if ((buflen -= 4) < 0)
2180 goto out_resource;
2181 WRITE32(1);
2182 }
2183 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2184 if ((buflen -= 8) < 0)
2185 goto out_resource;
2186 WRITE64(~(u64)0);
2187 }
2188 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2189 if ((buflen -= 4) < 0)
2190 goto out_resource;
2191 WRITE32(255);
2192 }
2193 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2194 if ((buflen -= 4) < 0)
2195 goto out_resource;
2196 WRITE32(statfs.f_namelen);
2197 }
2198 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2199 if ((buflen -= 8) < 0)
2200 goto out_resource;
2201 WRITE64((u64) svc_max_payload(rqstp));
2202 }
2203 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2204 if ((buflen -= 8) < 0)
2205 goto out_resource;
2206 WRITE64((u64) svc_max_payload(rqstp));
2207 }
2208 if (bmval1 & FATTR4_WORD1_MODE) {
2209 if ((buflen -= 4) < 0)
2210 goto out_resource;
2211 WRITE32(stat.mode & S_IALLUGO);
2212 }
2213 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2214 if ((buflen -= 4) < 0)
2215 goto out_resource;
2216 WRITE32(1);
2217 }
2218 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2219 if ((buflen -= 4) < 0)
2220 goto out_resource;
2221 WRITE32(stat.nlink);
2222 }
2223 if (bmval1 & FATTR4_WORD1_OWNER) {
2224 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2225 if (status == nfserr_resource)
2226 goto out_resource;
2227 if (status)
2228 goto out;
2229 }
2230 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2231 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2232 if (status == nfserr_resource)
2233 goto out_resource;
2234 if (status)
2235 goto out;
2236 }
2237 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2238 if ((buflen -= 8) < 0)
2239 goto out_resource;
2240 WRITE32((u32) MAJOR(stat.rdev));
2241 WRITE32((u32) MINOR(stat.rdev));
2242 }
2243 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2244 if ((buflen -= 8) < 0)
2245 goto out_resource;
2246 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2247 WRITE64(dummy64);
2248 }
2249 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2250 if ((buflen -= 8) < 0)
2251 goto out_resource;
2252 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2253 WRITE64(dummy64);
2254 }
2255 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2256 if ((buflen -= 8) < 0)
2257 goto out_resource;
2258 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2259 WRITE64(dummy64);
2260 }
2261 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2262 if ((buflen -= 8) < 0)
2263 goto out_resource;
2264 dummy64 = (u64)stat.blocks << 9;
2265 WRITE64(dummy64);
2266 }
2267 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2268 if ((buflen -= 12) < 0)
2269 goto out_resource;
2270 WRITE32(0);
2271 WRITE32(stat.atime.tv_sec);
2272 WRITE32(stat.atime.tv_nsec);
2273 }
2274 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2275 if ((buflen -= 12) < 0)
2276 goto out_resource;
2277 WRITE32(0);
2278 WRITE32(1);
2279 WRITE32(0);
2280 }
2281 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2282 if ((buflen -= 12) < 0)
2283 goto out_resource;
2284 WRITE32(0);
2285 WRITE32(stat.ctime.tv_sec);
2286 WRITE32(stat.ctime.tv_nsec);
2287 }
2288 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2289 if ((buflen -= 12) < 0)
2290 goto out_resource;
2291 WRITE32(0);
2292 WRITE32(stat.mtime.tv_sec);
2293 WRITE32(stat.mtime.tv_nsec);
2294 }
2295 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2296 if ((buflen -= 8) < 0)
2297 goto out_resource;
2298 /*
2299 * Get parent's attributes if not ignoring crossmount
2300 * and this is the root of a cross-mounted filesystem.
2301 */
2302 if (ignore_crossmnt == 0 &&
2303 dentry == exp->ex_path.mnt->mnt_root) {
2304 struct path path = exp->ex_path;
2305 path_get(&path);
2306 while (follow_up(&path)) {
2307 if (path.dentry != path.mnt->mnt_root)
2308 break;
2309 }
2310 err = vfs_getattr(path.mnt, path.dentry, &stat);
2311 path_put(&path);
2312 if (err)
2313 goto out_nfserr;
2314 }
2315 WRITE64(stat.ino);
2316 }
2317 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2318 WRITE32(3);
2319 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2320 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2321 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2322 }
2323
2324 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2325 *countp = p - buffer;
2326 status = nfs_ok;
2327
2328 out:
2329 kfree(acl);
2330 if (fhp == &tempfh)
2331 fh_put(&tempfh);
2332 return status;
2333 out_nfserr:
2334 status = nfserrno(err);
2335 goto out;
2336 out_resource:
2337 *countp = 0;
2338 status = nfserr_resource;
2339 goto out;
2340 out_serverfault:
2341 status = nfserr_serverfault;
2342 goto out;
2343 }
2344
2345 static inline int attributes_need_mount(u32 *bmval)
2346 {
2347 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2348 return 1;
2349 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2350 return 1;
2351 return 0;
2352 }
2353
2354 static __be32
2355 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2356 const char *name, int namlen, __be32 *p, int *buflen)
2357 {
2358 struct svc_export *exp = cd->rd_fhp->fh_export;
2359 struct dentry *dentry;
2360 __be32 nfserr;
2361 int ignore_crossmnt = 0;
2362
2363 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2364 if (IS_ERR(dentry))
2365 return nfserrno(PTR_ERR(dentry));
2366 if (!dentry->d_inode) {
2367 /*
2368 * nfsd_buffered_readdir drops the i_mutex between
2369 * readdir and calling this callback, leaving a window
2370 * where this directory entry could have gone away.
2371 */
2372 dput(dentry);
2373 return nfserr_noent;
2374 }
2375
2376 exp_get(exp);
2377 /*
2378 * In the case of a mountpoint, the client may be asking for
2379 * attributes that are only properties of the underlying filesystem
2380 * as opposed to the cross-mounted file system. In such a case,
2381 * we will not follow the cross mount and will fill the attribtutes
2382 * directly from the mountpoint dentry.
2383 */
2384 if (nfsd_mountpoint(dentry, exp)) {
2385 int err;
2386
2387 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2388 && !attributes_need_mount(cd->rd_bmval)) {
2389 ignore_crossmnt = 1;
2390 goto out_encode;
2391 }
2392 /*
2393 * Why the heck aren't we just using nfsd_lookup??
2394 * Different "."/".." handling? Something else?
2395 * At least, add a comment here to explain....
2396 */
2397 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2398 if (err) {
2399 nfserr = nfserrno(err);
2400 goto out_put;
2401 }
2402 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2403 if (nfserr)
2404 goto out_put;
2405
2406 }
2407 out_encode:
2408 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2409 cd->rd_rqstp, ignore_crossmnt);
2410 out_put:
2411 dput(dentry);
2412 exp_put(exp);
2413 return nfserr;
2414 }
2415
2416 static __be32 *
2417 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2418 {
2419 __be32 *attrlenp;
2420
2421 if (buflen < 6)
2422 return NULL;
2423 *p++ = htonl(2);
2424 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2425 *p++ = htonl(0); /* bmval1 */
2426
2427 attrlenp = p++;
2428 *p++ = nfserr; /* no htonl */
2429 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2430 return p;
2431 }
2432
2433 static int
2434 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2435 loff_t offset, u64 ino, unsigned int d_type)
2436 {
2437 struct readdir_cd *ccd = ccdv;
2438 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2439 int buflen;
2440 __be32 *p = cd->buffer;
2441 __be32 *cookiep;
2442 __be32 nfserr = nfserr_toosmall;
2443
2444 /* In nfsv4, "." and ".." never make it onto the wire.. */
2445 if (name && isdotent(name, namlen)) {
2446 cd->common.err = nfs_ok;
2447 return 0;
2448 }
2449
2450 if (cd->offset)
2451 xdr_encode_hyper(cd->offset, (u64) offset);
2452
2453 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2454 if (buflen < 0)
2455 goto fail;
2456
2457 *p++ = xdr_one; /* mark entry present */
2458 cookiep = p;
2459 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2460 p = xdr_encode_array(p, name, namlen); /* name length & name */
2461
2462 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2463 switch (nfserr) {
2464 case nfs_ok:
2465 p += buflen;
2466 break;
2467 case nfserr_resource:
2468 nfserr = nfserr_toosmall;
2469 goto fail;
2470 case nfserr_noent:
2471 goto skip_entry;
2472 default:
2473 /*
2474 * If the client requested the RDATTR_ERROR attribute,
2475 * we stuff the error code into this attribute
2476 * and continue. If this attribute was not requested,
2477 * then in accordance with the spec, we fail the
2478 * entire READDIR operation(!)
2479 */
2480 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2481 goto fail;
2482 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2483 if (p == NULL) {
2484 nfserr = nfserr_toosmall;
2485 goto fail;
2486 }
2487 }
2488 cd->buflen -= (p - cd->buffer);
2489 cd->buffer = p;
2490 cd->offset = cookiep;
2491 skip_entry:
2492 cd->common.err = nfs_ok;
2493 return 0;
2494 fail:
2495 cd->common.err = nfserr;
2496 return -EINVAL;
2497 }
2498
2499 static void
2500 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2501 {
2502 __be32 *p;
2503
2504 RESERVE_SPACE(sizeof(stateid_t));
2505 WRITE32(sid->si_generation);
2506 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2507 ADJUST_ARGS();
2508 }
2509
2510 static __be32
2511 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2512 {
2513 __be32 *p;
2514
2515 if (!nfserr) {
2516 RESERVE_SPACE(8);
2517 WRITE32(access->ac_supported);
2518 WRITE32(access->ac_resp_access);
2519 ADJUST_ARGS();
2520 }
2521 return nfserr;
2522 }
2523
2524 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2525 {
2526 __be32 *p;
2527
2528 if (!nfserr) {
2529 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2530 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2531 WRITE32(bcts->dir);
2532 /* XXX: ? */
2533 WRITE32(0);
2534 ADJUST_ARGS();
2535 }
2536 return nfserr;
2537 }
2538
2539 static __be32
2540 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2541 {
2542 ENCODE_SEQID_OP_HEAD;
2543
2544 if (!nfserr)
2545 nfsd4_encode_stateid(resp, &close->cl_stateid);
2546
2547 encode_seqid_op_tail(resp, save, nfserr);
2548 return nfserr;
2549 }
2550
2551
2552 static __be32
2553 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2554 {
2555 __be32 *p;
2556
2557 if (!nfserr) {
2558 RESERVE_SPACE(8);
2559 WRITEMEM(commit->co_verf.data, 8);
2560 ADJUST_ARGS();
2561 }
2562 return nfserr;
2563 }
2564
2565 static __be32
2566 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2567 {
2568 __be32 *p;
2569
2570 if (!nfserr) {
2571 RESERVE_SPACE(32);
2572 write_cinfo(&p, &create->cr_cinfo);
2573 WRITE32(2);
2574 WRITE32(create->cr_bmval[0]);
2575 WRITE32(create->cr_bmval[1]);
2576 ADJUST_ARGS();
2577 }
2578 return nfserr;
2579 }
2580
2581 static __be32
2582 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2583 {
2584 struct svc_fh *fhp = getattr->ga_fhp;
2585 int buflen;
2586
2587 if (nfserr)
2588 return nfserr;
2589
2590 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2591 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2592 resp->p, &buflen, getattr->ga_bmval,
2593 resp->rqstp, 0);
2594 if (!nfserr)
2595 resp->p += buflen;
2596 return nfserr;
2597 }
2598
2599 static __be32
2600 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2601 {
2602 struct svc_fh *fhp = *fhpp;
2603 unsigned int len;
2604 __be32 *p;
2605
2606 if (!nfserr) {
2607 len = fhp->fh_handle.fh_size;
2608 RESERVE_SPACE(len + 4);
2609 WRITE32(len);
2610 WRITEMEM(&fhp->fh_handle.fh_base, len);
2611 ADJUST_ARGS();
2612 }
2613 return nfserr;
2614 }
2615
2616 /*
2617 * Including all fields other than the name, a LOCK4denied structure requires
2618 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2619 */
2620 static void
2621 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2622 {
2623 struct xdr_netobj *conf = &ld->ld_owner;
2624 __be32 *p;
2625
2626 RESERVE_SPACE(32 + XDR_LEN(conf->len));
2627 WRITE64(ld->ld_start);
2628 WRITE64(ld->ld_length);
2629 WRITE32(ld->ld_type);
2630 if (conf->len) {
2631 WRITEMEM(&ld->ld_clientid, 8);
2632 WRITE32(conf->len);
2633 WRITEMEM(conf->data, conf->len);
2634 kfree(conf->data);
2635 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2636 WRITE64((u64)0); /* clientid */
2637 WRITE32(0); /* length of owner name */
2638 }
2639 ADJUST_ARGS();
2640 }
2641
2642 static __be32
2643 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2644 {
2645 ENCODE_SEQID_OP_HEAD;
2646
2647 if (!nfserr)
2648 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2649 else if (nfserr == nfserr_denied)
2650 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2651
2652 encode_seqid_op_tail(resp, save, nfserr);
2653 return nfserr;
2654 }
2655
2656 static __be32
2657 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2658 {
2659 if (nfserr == nfserr_denied)
2660 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2661 return nfserr;
2662 }
2663
2664 static __be32
2665 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2666 {
2667 ENCODE_SEQID_OP_HEAD;
2668
2669 if (!nfserr)
2670 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2671
2672 encode_seqid_op_tail(resp, save, nfserr);
2673 return nfserr;
2674 }
2675
2676
2677 static __be32
2678 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2679 {
2680 __be32 *p;
2681
2682 if (!nfserr) {
2683 RESERVE_SPACE(20);
2684 write_cinfo(&p, &link->li_cinfo);
2685 ADJUST_ARGS();
2686 }
2687 return nfserr;
2688 }
2689
2690
2691 static __be32
2692 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2693 {
2694 __be32 *p;
2695 ENCODE_SEQID_OP_HEAD;
2696
2697 if (nfserr)
2698 goto out;
2699
2700 nfsd4_encode_stateid(resp, &open->op_stateid);
2701 RESERVE_SPACE(40);
2702 write_cinfo(&p, &open->op_cinfo);
2703 WRITE32(open->op_rflags);
2704 WRITE32(2);
2705 WRITE32(open->op_bmval[0]);
2706 WRITE32(open->op_bmval[1]);
2707 WRITE32(open->op_delegate_type);
2708 ADJUST_ARGS();
2709
2710 switch (open->op_delegate_type) {
2711 case NFS4_OPEN_DELEGATE_NONE:
2712 break;
2713 case NFS4_OPEN_DELEGATE_READ:
2714 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2715 RESERVE_SPACE(20);
2716 WRITE32(open->op_recall);
2717
2718 /*
2719 * TODO: ACE's in delegations
2720 */
2721 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2722 WRITE32(0);
2723 WRITE32(0);
2724 WRITE32(0); /* XXX: is NULL principal ok? */
2725 ADJUST_ARGS();
2726 break;
2727 case NFS4_OPEN_DELEGATE_WRITE:
2728 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2729 RESERVE_SPACE(32);
2730 WRITE32(0);
2731
2732 /*
2733 * TODO: space_limit's in delegations
2734 */
2735 WRITE32(NFS4_LIMIT_SIZE);
2736 WRITE32(~(u32)0);
2737 WRITE32(~(u32)0);
2738
2739 /*
2740 * TODO: ACE's in delegations
2741 */
2742 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2743 WRITE32(0);
2744 WRITE32(0);
2745 WRITE32(0); /* XXX: is NULL principal ok? */
2746 ADJUST_ARGS();
2747 break;
2748 default:
2749 BUG();
2750 }
2751 /* XXX save filehandle here */
2752 out:
2753 encode_seqid_op_tail(resp, save, nfserr);
2754 return nfserr;
2755 }
2756
2757 static __be32
2758 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2759 {
2760 ENCODE_SEQID_OP_HEAD;
2761
2762 if (!nfserr)
2763 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2764
2765 encode_seqid_op_tail(resp, save, nfserr);
2766 return nfserr;
2767 }
2768
2769 static __be32
2770 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2771 {
2772 ENCODE_SEQID_OP_HEAD;
2773
2774 if (!nfserr)
2775 nfsd4_encode_stateid(resp, &od->od_stateid);
2776
2777 encode_seqid_op_tail(resp, save, nfserr);
2778 return nfserr;
2779 }
2780
2781 static __be32
2782 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2783 struct nfsd4_read *read)
2784 {
2785 u32 eof;
2786 int v, pn;
2787 unsigned long maxcount;
2788 long len;
2789 __be32 *p;
2790
2791 if (nfserr)
2792 return nfserr;
2793 if (resp->xbuf->page_len)
2794 return nfserr_resource;
2795
2796 RESERVE_SPACE(8); /* eof flag and byte count */
2797
2798 maxcount = svc_max_payload(resp->rqstp);
2799 if (maxcount > read->rd_length)
2800 maxcount = read->rd_length;
2801
2802 len = maxcount;
2803 v = 0;
2804 while (len > 0) {
2805 pn = resp->rqstp->rq_resused++;
2806 resp->rqstp->rq_vec[v].iov_base =
2807 page_address(resp->rqstp->rq_respages[pn]);
2808 resp->rqstp->rq_vec[v].iov_len =
2809 len < PAGE_SIZE ? len : PAGE_SIZE;
2810 v++;
2811 len -= PAGE_SIZE;
2812 }
2813 read->rd_vlen = v;
2814
2815 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2816 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2817 &maxcount);
2818
2819 if (nfserr)
2820 return nfserr;
2821 eof = (read->rd_offset + maxcount >=
2822 read->rd_fhp->fh_dentry->d_inode->i_size);
2823
2824 WRITE32(eof);
2825 WRITE32(maxcount);
2826 ADJUST_ARGS();
2827 resp->xbuf->head[0].iov_len = (char*)p
2828 - (char*)resp->xbuf->head[0].iov_base;
2829 resp->xbuf->page_len = maxcount;
2830
2831 /* Use rest of head for padding and remaining ops: */
2832 resp->xbuf->tail[0].iov_base = p;
2833 resp->xbuf->tail[0].iov_len = 0;
2834 if (maxcount&3) {
2835 RESERVE_SPACE(4);
2836 WRITE32(0);
2837 resp->xbuf->tail[0].iov_base += maxcount&3;
2838 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2839 ADJUST_ARGS();
2840 }
2841 return 0;
2842 }
2843
2844 static __be32
2845 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2846 {
2847 int maxcount;
2848 char *page;
2849 __be32 *p;
2850
2851 if (nfserr)
2852 return nfserr;
2853 if (resp->xbuf->page_len)
2854 return nfserr_resource;
2855
2856 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2857
2858 maxcount = PAGE_SIZE;
2859 RESERVE_SPACE(4);
2860
2861 /*
2862 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2863 * if they would overflow the buffer. Is this kosher in NFSv4? If
2864 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2865 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2866 */
2867 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2868 if (nfserr == nfserr_isdir)
2869 return nfserr_inval;
2870 if (nfserr)
2871 return nfserr;
2872
2873 WRITE32(maxcount);
2874 ADJUST_ARGS();
2875 resp->xbuf->head[0].iov_len = (char*)p
2876 - (char*)resp->xbuf->head[0].iov_base;
2877 resp->xbuf->page_len = maxcount;
2878
2879 /* Use rest of head for padding and remaining ops: */
2880 resp->xbuf->tail[0].iov_base = p;
2881 resp->xbuf->tail[0].iov_len = 0;
2882 if (maxcount&3) {
2883 RESERVE_SPACE(4);
2884 WRITE32(0);
2885 resp->xbuf->tail[0].iov_base += maxcount&3;
2886 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2887 ADJUST_ARGS();
2888 }
2889 return 0;
2890 }
2891
2892 static __be32
2893 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2894 {
2895 int maxcount;
2896 loff_t offset;
2897 __be32 *page, *savep, *tailbase;
2898 __be32 *p;
2899
2900 if (nfserr)
2901 return nfserr;
2902 if (resp->xbuf->page_len)
2903 return nfserr_resource;
2904
2905 RESERVE_SPACE(8); /* verifier */
2906 savep = p;
2907
2908 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2909 WRITE32(0);
2910 WRITE32(0);
2911 ADJUST_ARGS();
2912 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2913 tailbase = p;
2914
2915 maxcount = PAGE_SIZE;
2916 if (maxcount > readdir->rd_maxcount)
2917 maxcount = readdir->rd_maxcount;
2918
2919 /*
2920 * Convert from bytes to words, account for the two words already
2921 * written, make sure to leave two words at the end for the next
2922 * pointer and eof field.
2923 */
2924 maxcount = (maxcount >> 2) - 4;
2925 if (maxcount < 0) {
2926 nfserr = nfserr_toosmall;
2927 goto err_no_verf;
2928 }
2929
2930 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2931 readdir->common.err = 0;
2932 readdir->buflen = maxcount;
2933 readdir->buffer = page;
2934 readdir->offset = NULL;
2935
2936 offset = readdir->rd_cookie;
2937 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2938 &offset,
2939 &readdir->common, nfsd4_encode_dirent);
2940 if (nfserr == nfs_ok &&
2941 readdir->common.err == nfserr_toosmall &&
2942 readdir->buffer == page)
2943 nfserr = nfserr_toosmall;
2944 if (nfserr)
2945 goto err_no_verf;
2946
2947 if (readdir->offset)
2948 xdr_encode_hyper(readdir->offset, offset);
2949
2950 p = readdir->buffer;
2951 *p++ = 0; /* no more entries */
2952 *p++ = htonl(readdir->common.err == nfserr_eof);
2953 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2954 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2955
2956 /* Use rest of head for padding and remaining ops: */
2957 resp->xbuf->tail[0].iov_base = tailbase;
2958 resp->xbuf->tail[0].iov_len = 0;
2959 resp->p = resp->xbuf->tail[0].iov_base;
2960 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2961
2962 return 0;
2963 err_no_verf:
2964 p = savep;
2965 ADJUST_ARGS();
2966 return nfserr;
2967 }
2968
2969 static __be32
2970 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2971 {
2972 __be32 *p;
2973
2974 if (!nfserr) {
2975 RESERVE_SPACE(20);
2976 write_cinfo(&p, &remove->rm_cinfo);
2977 ADJUST_ARGS();
2978 }
2979 return nfserr;
2980 }
2981
2982 static __be32
2983 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2984 {
2985 __be32 *p;
2986
2987 if (!nfserr) {
2988 RESERVE_SPACE(40);
2989 write_cinfo(&p, &rename->rn_sinfo);
2990 write_cinfo(&p, &rename->rn_tinfo);
2991 ADJUST_ARGS();
2992 }
2993 return nfserr;
2994 }
2995
2996 static __be32
2997 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2998 __be32 nfserr,struct svc_export *exp)
2999 {
3000 int i = 0;
3001 u32 nflavs;
3002 struct exp_flavor_info *flavs;
3003 struct exp_flavor_info def_flavs[2];
3004 __be32 *p;
3005
3006 if (nfserr)
3007 goto out;
3008 if (exp->ex_nflavors) {
3009 flavs = exp->ex_flavors;
3010 nflavs = exp->ex_nflavors;
3011 } else { /* Handling of some defaults in absence of real secinfo: */
3012 flavs = def_flavs;
3013 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3014 nflavs = 2;
3015 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3016 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3017 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3018 nflavs = 1;
3019 flavs[0].pseudoflavor
3020 = svcauth_gss_flavor(exp->ex_client);
3021 } else {
3022 nflavs = 1;
3023 flavs[0].pseudoflavor
3024 = exp->ex_client->flavour->flavour;
3025 }
3026 }
3027
3028 RESERVE_SPACE(4);
3029 WRITE32(nflavs);
3030 ADJUST_ARGS();
3031 for (i = 0; i < nflavs; i++) {
3032 u32 flav = flavs[i].pseudoflavor;
3033 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3034
3035 if (gm) {
3036 RESERVE_SPACE(4);
3037 WRITE32(RPC_AUTH_GSS);
3038 ADJUST_ARGS();
3039 RESERVE_SPACE(4 + gm->gm_oid.len);
3040 WRITE32(gm->gm_oid.len);
3041 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3042 ADJUST_ARGS();
3043 RESERVE_SPACE(4);
3044 WRITE32(0); /* qop */
3045 ADJUST_ARGS();
3046 RESERVE_SPACE(4);
3047 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3048 ADJUST_ARGS();
3049 gss_mech_put(gm);
3050 } else {
3051 RESERVE_SPACE(4);
3052 WRITE32(flav);
3053 ADJUST_ARGS();
3054 }
3055 }
3056 out:
3057 if (exp)
3058 exp_put(exp);
3059 return nfserr;
3060 }
3061
3062 static __be32
3063 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3064 struct nfsd4_secinfo *secinfo)
3065 {
3066 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3067 }
3068
3069 static __be32
3070 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3071 struct nfsd4_secinfo_no_name *secinfo)
3072 {
3073 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3074 }
3075
3076 /*
3077 * The SETATTR encode routine is special -- it always encodes a bitmap,
3078 * regardless of the error status.
3079 */
3080 static __be32
3081 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3082 {
3083 __be32 *p;
3084
3085 RESERVE_SPACE(12);
3086 if (nfserr) {
3087 WRITE32(2);
3088 WRITE32(0);
3089 WRITE32(0);
3090 }
3091 else {
3092 WRITE32(2);
3093 WRITE32(setattr->sa_bmval[0]);
3094 WRITE32(setattr->sa_bmval[1]);
3095 }
3096 ADJUST_ARGS();
3097 return nfserr;
3098 }
3099
3100 static __be32
3101 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3102 {
3103 __be32 *p;
3104
3105 if (!nfserr) {
3106 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3107 WRITEMEM(&scd->se_clientid, 8);
3108 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3109 ADJUST_ARGS();
3110 }
3111 else if (nfserr == nfserr_clid_inuse) {
3112 RESERVE_SPACE(8);
3113 WRITE32(0);
3114 WRITE32(0);
3115 ADJUST_ARGS();
3116 }
3117 return nfserr;
3118 }
3119
3120 static __be32
3121 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3122 {
3123 __be32 *p;
3124
3125 if (!nfserr) {
3126 RESERVE_SPACE(16);
3127 WRITE32(write->wr_bytes_written);
3128 WRITE32(write->wr_how_written);
3129 WRITEMEM(write->wr_verifier.data, 8);
3130 ADJUST_ARGS();
3131 }
3132 return nfserr;
3133 }
3134
3135 static __be32
3136 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3137 struct nfsd4_exchange_id *exid)
3138 {
3139 __be32 *p;
3140 char *major_id;
3141 char *server_scope;
3142 int major_id_sz;
3143 int server_scope_sz;
3144 uint64_t minor_id = 0;
3145
3146 if (nfserr)
3147 return nfserr;
3148
3149 major_id = utsname()->nodename;
3150 major_id_sz = strlen(major_id);
3151 server_scope = utsname()->nodename;
3152 server_scope_sz = strlen(server_scope);
3153
3154 RESERVE_SPACE(
3155 8 /* eir_clientid */ +
3156 4 /* eir_sequenceid */ +
3157 4 /* eir_flags */ +
3158 4 /* spr_how (SP4_NONE) */ +
3159 8 /* so_minor_id */ +
3160 4 /* so_major_id.len */ +
3161 (XDR_QUADLEN(major_id_sz) * 4) +
3162 4 /* eir_server_scope.len */ +
3163 (XDR_QUADLEN(server_scope_sz) * 4) +
3164 4 /* eir_server_impl_id.count (0) */);
3165
3166 WRITEMEM(&exid->clientid, 8);
3167 WRITE32(exid->seqid);
3168 WRITE32(exid->flags);
3169
3170 /* state_protect4_r. Currently only support SP4_NONE */
3171 BUG_ON(exid->spa_how != SP4_NONE);
3172 WRITE32(exid->spa_how);
3173
3174 /* The server_owner struct */
3175 WRITE64(minor_id); /* Minor id */
3176 /* major id */
3177 WRITE32(major_id_sz);
3178 WRITEMEM(major_id, major_id_sz);
3179
3180 /* Server scope */
3181 WRITE32(server_scope_sz);
3182 WRITEMEM(server_scope, server_scope_sz);
3183
3184 /* Implementation id */
3185 WRITE32(0); /* zero length nfs_impl_id4 array */
3186 ADJUST_ARGS();
3187 return 0;
3188 }
3189
3190 static __be32
3191 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3192 struct nfsd4_create_session *sess)
3193 {
3194 __be32 *p;
3195
3196 if (nfserr)
3197 return nfserr;
3198
3199 RESERVE_SPACE(24);
3200 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3201 WRITE32(sess->seqid);
3202 WRITE32(sess->flags);
3203 ADJUST_ARGS();
3204
3205 RESERVE_SPACE(28);
3206 WRITE32(0); /* headerpadsz */
3207 WRITE32(sess->fore_channel.maxreq_sz);
3208 WRITE32(sess->fore_channel.maxresp_sz);
3209 WRITE32(sess->fore_channel.maxresp_cached);
3210 WRITE32(sess->fore_channel.maxops);
3211 WRITE32(sess->fore_channel.maxreqs);
3212 WRITE32(sess->fore_channel.nr_rdma_attrs);
3213 ADJUST_ARGS();
3214
3215 if (sess->fore_channel.nr_rdma_attrs) {
3216 RESERVE_SPACE(4);
3217 WRITE32(sess->fore_channel.rdma_attrs);
3218 ADJUST_ARGS();
3219 }
3220
3221 RESERVE_SPACE(28);
3222 WRITE32(0); /* headerpadsz */
3223 WRITE32(sess->back_channel.maxreq_sz);
3224 WRITE32(sess->back_channel.maxresp_sz);
3225 WRITE32(sess->back_channel.maxresp_cached);
3226 WRITE32(sess->back_channel.maxops);
3227 WRITE32(sess->back_channel.maxreqs);
3228 WRITE32(sess->back_channel.nr_rdma_attrs);
3229 ADJUST_ARGS();
3230
3231 if (sess->back_channel.nr_rdma_attrs) {
3232 RESERVE_SPACE(4);
3233 WRITE32(sess->back_channel.rdma_attrs);
3234 ADJUST_ARGS();
3235 }
3236 return 0;
3237 }
3238
3239 static __be32
3240 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3241 struct nfsd4_destroy_session *destroy_session)
3242 {
3243 return nfserr;
3244 }
3245
3246 static __be32
3247 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3248 struct nfsd4_free_stateid *free_stateid)
3249 {
3250 __be32 *p;
3251
3252 if (nfserr)
3253 return nfserr;
3254
3255 RESERVE_SPACE(4);
3256 WRITE32(nfserr);
3257 ADJUST_ARGS();
3258 return nfserr;
3259 }
3260
3261 static __be32
3262 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3263 struct nfsd4_sequence *seq)
3264 {
3265 __be32 *p;
3266
3267 if (nfserr)
3268 return nfserr;
3269
3270 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3271 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3272 WRITE32(seq->seqid);
3273 WRITE32(seq->slotid);
3274 /* Note slotid's are numbered from zero: */
3275 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3276 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3277 WRITE32(seq->status_flags);
3278
3279 ADJUST_ARGS();
3280 resp->cstate.datap = p; /* DRC cache data pointer */
3281 return 0;
3282 }
3283
3284 __be32
3285 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3286 struct nfsd4_test_stateid *test_stateid)
3287 {
3288 struct nfsd4_compoundargs *argp;
3289 stateid_t si;
3290 __be32 *p;
3291 int i;
3292 int valid;
3293
3294 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3295 argp = test_stateid->ts_saved_args;
3296
3297 RESERVE_SPACE(4);
3298 *p++ = htonl(test_stateid->ts_num_ids);
3299 resp->p = p;
3300
3301 nfs4_lock_state();
3302 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3303 nfsd4_decode_stateid(argp, &si);
3304 valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session);
3305 RESERVE_SPACE(4);
3306 *p++ = htonl(valid);
3307 resp->p = p;
3308 }
3309 nfs4_unlock_state();
3310
3311 return nfserr;
3312 }
3313
3314 static __be32
3315 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3316 {
3317 return nfserr;
3318 }
3319
3320 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3321
3322 /*
3323 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3324 * since we don't need to filter out obsolete ops as this is
3325 * done in the decoding phase.
3326 */
3327 static nfsd4_enc nfsd4_enc_ops[] = {
3328 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3329 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3330 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3331 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3332 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3333 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3334 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3335 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3336 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3337 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3338 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3339 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3340 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3341 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3342 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3343 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3344 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3345 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3346 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3347 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3348 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3349 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3350 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3351 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3352 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3353 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3354 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3355 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3356 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3357 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3358 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3359 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3360 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3361 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3362 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3363 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3364 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3365
3366 /* NFSv4.1 operations */
3367 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3368 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3369 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3370 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3371 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3372 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3373 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3374 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3375 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3376 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3377 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3378 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3379 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3380 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3381 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3382 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3383 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3384 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3385 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3386 };
3387
3388 /*
3389 * Calculate the total amount of memory that the compound response has taken
3390 * after encoding the current operation.
3391 *
3392 * pad: add on 8 bytes for the next operation's op_code and status so that
3393 * there is room to cache a failure on the next operation.
3394 *
3395 * Compare this length to the session se_fmaxresp_cached.
3396 *
3397 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3398 * will be at least a page and will therefore hold the xdr_buf head.
3399 */
3400 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3401 {
3402 int status = 0;
3403 struct xdr_buf *xb = &resp->rqstp->rq_res;
3404 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3405 struct nfsd4_session *session = NULL;
3406 struct nfsd4_slot *slot = resp->cstate.slot;
3407 u32 length, tlen = 0, pad = 8;
3408
3409 if (!nfsd4_has_session(&resp->cstate))
3410 return status;
3411
3412 session = resp->cstate.session;
3413 if (session == NULL || slot->sl_cachethis == 0)
3414 return status;
3415
3416 if (resp->opcnt >= args->opcnt)
3417 pad = 0; /* this is the last operation */
3418
3419 if (xb->page_len == 0) {
3420 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3421 } else {
3422 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3423 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3424
3425 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3426 }
3427 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3428 length, xb->page_len, tlen, pad);
3429
3430 if (length <= session->se_fchannel.maxresp_cached)
3431 return status;
3432 else
3433 return nfserr_rep_too_big_to_cache;
3434 }
3435
3436 void
3437 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3438 {
3439 __be32 *statp;
3440 __be32 *p;
3441
3442 RESERVE_SPACE(8);
3443 WRITE32(op->opnum);
3444 statp = p++; /* to be backfilled at the end */
3445 ADJUST_ARGS();
3446
3447 if (op->opnum == OP_ILLEGAL)
3448 goto status;
3449 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3450 !nfsd4_enc_ops[op->opnum]);
3451 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3452 /* nfsd4_check_drc_limit guarantees enough room for error status */
3453 if (!op->status && nfsd4_check_drc_limit(resp))
3454 op->status = nfserr_rep_too_big_to_cache;
3455 status:
3456 /*
3457 * Note: We write the status directly, instead of using WRITE32(),
3458 * since it is already in network byte order.
3459 */
3460 *statp = op->status;
3461 }
3462
3463 /*
3464 * Encode the reply stored in the stateowner reply cache
3465 *
3466 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3467 * previously sent already encoded operation.
3468 *
3469 * called with nfs4_lock_state() held
3470 */
3471 void
3472 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3473 {
3474 __be32 *p;
3475 struct nfs4_replay *rp = op->replay;
3476
3477 BUG_ON(!rp);
3478
3479 RESERVE_SPACE(8);
3480 WRITE32(op->opnum);
3481 *p++ = rp->rp_status; /* already xdr'ed */
3482 ADJUST_ARGS();
3483
3484 RESERVE_SPACE(rp->rp_buflen);
3485 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3486 ADJUST_ARGS();
3487 }
3488
3489 int
3490 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3491 {
3492 return xdr_ressize_check(rqstp, p);
3493 }
3494
3495 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3496 {
3497 struct svc_rqst *rqstp = rq;
3498 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3499
3500 if (args->ops != args->iops) {
3501 kfree(args->ops);
3502 args->ops = args->iops;
3503 }
3504 kfree(args->tmpp);
3505 args->tmpp = NULL;
3506 while (args->to_free) {
3507 struct tmpbuf *tb = args->to_free;
3508 args->to_free = tb->next;
3509 tb->release(tb->buf);
3510 kfree(tb);
3511 }
3512 return 1;
3513 }
3514
3515 int
3516 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3517 {
3518 args->p = p;
3519 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3520 args->pagelist = rqstp->rq_arg.pages;
3521 args->pagelen = rqstp->rq_arg.page_len;
3522 args->tmpp = NULL;
3523 args->to_free = NULL;
3524 args->ops = args->iops;
3525 args->rqstp = rqstp;
3526
3527 return !nfsd4_decode_compound(args);
3528 }
3529
3530 int
3531 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3532 {
3533 /*
3534 * All that remains is to write the tag and operation count...
3535 */
3536 struct nfsd4_compound_state *cs = &resp->cstate;
3537 struct kvec *iov;
3538 p = resp->tagp;
3539 *p++ = htonl(resp->taglen);
3540 memcpy(p, resp->tag, resp->taglen);
3541 p += XDR_QUADLEN(resp->taglen);
3542 *p++ = htonl(resp->opcnt);
3543
3544 if (rqstp->rq_res.page_len)
3545 iov = &rqstp->rq_res.tail[0];
3546 else
3547 iov = &rqstp->rq_res.head[0];
3548 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3549 BUG_ON(iov->iov_len > PAGE_SIZE);
3550 if (nfsd4_has_session(cs)) {
3551 if (cs->status != nfserr_replay_cache) {
3552 nfsd4_store_cache_entry(resp);
3553 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3554 cs->slot->sl_inuse = false;
3555 }
3556 /* Renew the clientid on success and on replay */
3557 release_session_client(cs->session);
3558 nfsd4_put_session(cs->session);
3559 }
3560 return 1;
3561 }
3562
3563 /*
3564 * Local variables:
3565 * c-basic-offset: 8
3566 * End:
3567 */
Linux kernel - Deliverables
This page took 0.105322 seconds and 5 git commands to generate.