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Merge tag 'regmap-v3.14-rc4' into regmap-linus
[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 #include "netns.h"
57
58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59 #include <linux/security.h>
60 #endif
61
62
63 #define NFSDDBG_FACILITY NFSDDBG_XDR
64
65 /*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
73 static __be32
74 check_filename(char *str, int len)
75 {
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
81 return nfserr_badname;
82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
84 return nfserr_badname;
85 return 0;
86 }
87
88 #define DECODE_HEAD \
89 __be32 *p; \
90 __be32 status
91 #define DECODE_TAIL \
92 status = 0; \
93 out: \
94 return status; \
95 xdr_error: \
96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
98 status = nfserr_bad_xdr; \
99 goto out
100
101 #define READ32(x) (x) = ntohl(*p++)
102 #define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105 } while (0)
106 #define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109 } while (0)
110 #define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119 } while (0)
120 #define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123 } while (0)
124
125 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126 #define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
133 goto xdr_error; \
134 } \
135 } while (0)
136
137 static void next_decode_page(struct nfsd4_compoundargs *argp)
138 {
139 argp->p = page_address(argp->pagelist[0]);
140 argp->pagelist++;
141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148 }
149
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
151 {
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
156 __be32 *p;
157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
165 kfree(argp->tmpp);
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
176 memcpy(p, argp->p, avail);
177 next_decode_page(argp);
178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181 }
182
183 static int zero_clientid(clientid_t *clid)
184 {
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186 }
187
188 /**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
197 static int
198 defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200 {
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211 }
212
213 /**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
223 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
224 {
225 if (p == argp->tmp) {
226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
227 if (!p)
228 return NULL;
229 } else {
230 BUG_ON(p != argp->tmpp);
231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
234 kfree(p);
235 return NULL;
236 } else
237 return (char *)p;
238 }
239
240 static __be32
241 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242 {
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
248 bmval[2] = 0;
249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
260 if (bmlen > 2)
261 READ32(bmval[2]);
262
263 DECODE_TAIL;
264 }
265
266 static __be32
267 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
270 {
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
290 u32 nace;
291 struct nfs4_ace *ace;
292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
296 if (nace > NFS4_ACL_MAX)
297 return nfserr_resource;
298
299 *acl = nfs4_acl_new(nace);
300 if (*acl == NULL)
301 return nfserr_jukebox;
302
303 defer_free(argp, kfree, *acl);
304
305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
307 READ_BUF(16); len += 16;
308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
316 status = nfs_ok;
317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
318 ;
319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
320 status = nfsd_map_name_to_gid(argp->rqstp,
321 buf, dummy32, &ace->who_gid);
322 else
323 status = nfsd_map_name_to_uid(argp->rqstp,
324 buf, dummy32, &ace->who_uid);
325 if (status)
326 return status;
327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
369 READ64(iattr->ia_atime.tv_sec);
370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
392 READ64(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
406 label->len = 0;
407 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
426 label->len = dummy32;
427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430 #endif
431
432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
437 goto xdr_error;
438
439 DECODE_TAIL;
440 }
441
442 static __be32
443 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444 {
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452 }
453
454 static __be32
455 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456 {
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463 }
464
465 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466 {
467 DECODE_HEAD;
468 u32 dummy, uid, gid;
469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
502 READ32(uid);
503 READ32(gid);
504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
509 if (cbs->flavor == (u32)(-1)) {
510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
520 }
521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543 }
544
545 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546 {
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554 }
555
556 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557 {
558 DECODE_HEAD;
559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
565 DECODE_TAIL;
566 }
567
568 static __be32
569 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570 {
571 DECODE_HEAD;
572
573 READ_BUF(4);
574 READ32(close->cl_seqid);
575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
576
577 DECODE_TAIL;
578 }
579
580
581 static __be32
582 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583 {
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591 }
592
593 static __be32
594 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595 {
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
625 return status;
626
627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
628 &create->cr_acl, &create->cr_label);
629 if (status)
630 goto out;
631
632 DECODE_TAIL;
633 }
634
635 static inline __be32
636 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637 {
638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
639 }
640
641 static inline __be32
642 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643 {
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645 }
646
647 static __be32
648 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649 {
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
656 if ((status = check_filename(link->li_name, link->li_namelen)))
657 return status;
658
659 DECODE_TAIL;
660 }
661
662 static __be32
663 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664 {
665 DECODE_HEAD;
666
667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
680 READ_BUF(4);
681 READ32(lock->lk_new_open_seqid);
682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700 }
701
702 static __be32
703 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704 {
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719 }
720
721 static __be32
722 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723 {
724 DECODE_HEAD;
725
726 READ_BUF(8);
727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739 }
740
741 static __be32
742 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743 {
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
751 return status;
752
753 DECODE_TAIL;
754 }
755
756 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
757 {
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
776 w &= ~NFS4_SHARE_ACCESS_MASK;
777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
792 w &= ~NFS4_SHARE_WANT_MASK;
793 if (!w)
794 return nfs_ok;
795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
803 return nfs_ok;
804 }
805 xdr_error:
806 return nfserr_bad_xdr;
807 }
808
809 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810 {
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
816 if (*x & ~NFS4_SHARE_DENY_BOTH)
817 return nfserr_bad_xdr;
818 return nfs_ok;
819 xdr_error:
820 return nfserr_bad_xdr;
821 }
822
823 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824 {
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836 xdr_error:
837 return nfserr_bad_xdr;
838 }
839
840 static __be32
841 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842 {
843 DECODE_HEAD;
844 u32 dummy;
845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
848 open->op_openowner = NULL;
849
850 open->op_xdr_error = 0;
851 /* seqid, share_access, share_deny, clientid, ownerlen */
852 READ_BUF(4);
853 READ32(open->op_seqid);
854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
862 READ_BUF(sizeof(clientid_t));
863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
878 status = nfsd4_decode_fattr(argp, open->op_bmval,
879 &open->op_iattr, &open->op_acl, &open->op_label);
880 if (status)
881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
886 break;
887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
892 status = nfsd4_decode_fattr(argp, open->op_bmval,
893 &open->op_iattr, &open->op_acl, &open->op_label);
894 if (status)
895 goto out;
896 break;
897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
931 return status;
932 break;
933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951 }
952
953 static __be32
954 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955 {
956 DECODE_HEAD;
957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
965 READ32(open_conf->oc_seqid);
966
967 DECODE_TAIL;
968 }
969
970 static __be32
971 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972 {
973 DECODE_HEAD;
974
975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
978 READ_BUF(4);
979 READ32(open_down->od_seqid);
980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
987 DECODE_TAIL;
988 }
989
990 static __be32
991 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992 {
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003 }
1004
1005 static __be32
1006 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007 {
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011 }
1012
1013 static __be32
1014 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015 {
1016 DECODE_HEAD;
1017
1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026 }
1027
1028 static __be32
1029 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030 {
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1036 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042 }
1043
1044 static __be32
1045 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046 {
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1054 return status;
1055
1056 DECODE_TAIL;
1057 }
1058
1059 static __be32
1060 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061 {
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1072 return status;
1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1074 return status;
1075
1076 DECODE_TAIL;
1077 }
1078
1079 static __be32
1080 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081 {
1082 DECODE_HEAD;
1083
1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091 }
1092
1093 static __be32
1094 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096 {
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107 }
1108
1109 static __be32
1110 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112 {
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118 }
1119
1120 static __be32
1121 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122 {
1123 __be32 status;
1124
1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1129 &setattr->sa_acl, &setattr->sa_label);
1130 }
1131
1132 static __be32
1133 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134 {
1135 DECODE_HEAD;
1136
1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1142
1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159 }
1160
1161 static __be32
1162 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163 {
1164 DECODE_HEAD;
1165
1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1170 COPYMEM(&scd_c->sc_clientid, 8);
1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1172
1173 DECODE_TAIL;
1174 }
1175
1176 /* Also used for NVERIFY */
1177 static __be32
1178 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179 {
1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
1186 * nfsd4_proc_verify */
1187
1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194 }
1195
1196 static __be32
1197 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198 {
1199 int avail;
1200 int len;
1201 DECODE_HEAD;
1202
1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1221 goto xdr_error;
1222 }
1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
1225 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
1226 write->wr_pagelist = argp->pagelist;
1227
1228 len = XDR_QUADLEN(write->wr_buflen) << 2;
1229 if (len >= avail) {
1230 int pages;
1231
1232 len -= avail;
1233
1234 pages = len >> PAGE_SHIFT;
1235 argp->pagelist += pages;
1236 argp->pagelen -= pages * PAGE_SIZE;
1237 len -= pages * PAGE_SIZE;
1238
1239 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1240 argp->pagelist++;
1241 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1242 }
1243 argp->p += XDR_QUADLEN(len);
1244
1245 DECODE_TAIL;
1246 }
1247
1248 static __be32
1249 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1250 {
1251 DECODE_HEAD;
1252
1253 if (argp->minorversion >= 1)
1254 return nfserr_notsupp;
1255
1256 READ_BUF(12);
1257 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1258 READ32(rlockowner->rl_owner.len);
1259 READ_BUF(rlockowner->rl_owner.len);
1260 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1261
1262 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1263 return nfserr_inval;
1264 DECODE_TAIL;
1265 }
1266
1267 static __be32
1268 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1269 struct nfsd4_exchange_id *exid)
1270 {
1271 int dummy, tmp;
1272 DECODE_HEAD;
1273
1274 READ_BUF(NFS4_VERIFIER_SIZE);
1275 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1276
1277 status = nfsd4_decode_opaque(argp, &exid->clname);
1278 if (status)
1279 return nfserr_bad_xdr;
1280
1281 READ_BUF(4);
1282 READ32(exid->flags);
1283
1284 /* Ignore state_protect4_a */
1285 READ_BUF(4);
1286 READ32(exid->spa_how);
1287 switch (exid->spa_how) {
1288 case SP4_NONE:
1289 break;
1290 case SP4_MACH_CRED:
1291 /* spo_must_enforce */
1292 READ_BUF(4);
1293 READ32(dummy);
1294 READ_BUF(dummy * 4);
1295 p += dummy;
1296
1297 /* spo_must_allow */
1298 READ_BUF(4);
1299 READ32(dummy);
1300 READ_BUF(dummy * 4);
1301 p += dummy;
1302 break;
1303 case SP4_SSV:
1304 /* ssp_ops */
1305 READ_BUF(4);
1306 READ32(dummy);
1307 READ_BUF(dummy * 4);
1308 p += dummy;
1309
1310 READ_BUF(4);
1311 READ32(dummy);
1312 READ_BUF(dummy * 4);
1313 p += dummy;
1314
1315 /* ssp_hash_algs<> */
1316 READ_BUF(4);
1317 READ32(tmp);
1318 while (tmp--) {
1319 READ_BUF(4);
1320 READ32(dummy);
1321 READ_BUF(dummy);
1322 p += XDR_QUADLEN(dummy);
1323 }
1324
1325 /* ssp_encr_algs<> */
1326 READ_BUF(4);
1327 READ32(tmp);
1328 while (tmp--) {
1329 READ_BUF(4);
1330 READ32(dummy);
1331 READ_BUF(dummy);
1332 p += XDR_QUADLEN(dummy);
1333 }
1334
1335 /* ssp_window and ssp_num_gss_handles */
1336 READ_BUF(8);
1337 READ32(dummy);
1338 READ32(dummy);
1339 break;
1340 default:
1341 goto xdr_error;
1342 }
1343
1344 /* Ignore Implementation ID */
1345 READ_BUF(4); /* nfs_impl_id4 array length */
1346 READ32(dummy);
1347
1348 if (dummy > 1)
1349 goto xdr_error;
1350
1351 if (dummy == 1) {
1352 /* nii_domain */
1353 READ_BUF(4);
1354 READ32(dummy);
1355 READ_BUF(dummy);
1356 p += XDR_QUADLEN(dummy);
1357
1358 /* nii_name */
1359 READ_BUF(4);
1360 READ32(dummy);
1361 READ_BUF(dummy);
1362 p += XDR_QUADLEN(dummy);
1363
1364 /* nii_date */
1365 READ_BUF(12);
1366 p += 3;
1367 }
1368 DECODE_TAIL;
1369 }
1370
1371 static __be32
1372 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1373 struct nfsd4_create_session *sess)
1374 {
1375 DECODE_HEAD;
1376 u32 dummy;
1377
1378 READ_BUF(16);
1379 COPYMEM(&sess->clientid, 8);
1380 READ32(sess->seqid);
1381 READ32(sess->flags);
1382
1383 /* Fore channel attrs */
1384 READ_BUF(28);
1385 READ32(dummy); /* headerpadsz is always 0 */
1386 READ32(sess->fore_channel.maxreq_sz);
1387 READ32(sess->fore_channel.maxresp_sz);
1388 READ32(sess->fore_channel.maxresp_cached);
1389 READ32(sess->fore_channel.maxops);
1390 READ32(sess->fore_channel.maxreqs);
1391 READ32(sess->fore_channel.nr_rdma_attrs);
1392 if (sess->fore_channel.nr_rdma_attrs == 1) {
1393 READ_BUF(4);
1394 READ32(sess->fore_channel.rdma_attrs);
1395 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1396 dprintk("Too many fore channel attr bitmaps!\n");
1397 goto xdr_error;
1398 }
1399
1400 /* Back channel attrs */
1401 READ_BUF(28);
1402 READ32(dummy); /* headerpadsz is always 0 */
1403 READ32(sess->back_channel.maxreq_sz);
1404 READ32(sess->back_channel.maxresp_sz);
1405 READ32(sess->back_channel.maxresp_cached);
1406 READ32(sess->back_channel.maxops);
1407 READ32(sess->back_channel.maxreqs);
1408 READ32(sess->back_channel.nr_rdma_attrs);
1409 if (sess->back_channel.nr_rdma_attrs == 1) {
1410 READ_BUF(4);
1411 READ32(sess->back_channel.rdma_attrs);
1412 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1413 dprintk("Too many back channel attr bitmaps!\n");
1414 goto xdr_error;
1415 }
1416
1417 READ_BUF(4);
1418 READ32(sess->callback_prog);
1419 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1420 DECODE_TAIL;
1421 }
1422
1423 static __be32
1424 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1425 struct nfsd4_destroy_session *destroy_session)
1426 {
1427 DECODE_HEAD;
1428 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1429 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1430
1431 DECODE_TAIL;
1432 }
1433
1434 static __be32
1435 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1436 struct nfsd4_free_stateid *free_stateid)
1437 {
1438 DECODE_HEAD;
1439
1440 READ_BUF(sizeof(stateid_t));
1441 READ32(free_stateid->fr_stateid.si_generation);
1442 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1443
1444 DECODE_TAIL;
1445 }
1446
1447 static __be32
1448 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1449 struct nfsd4_sequence *seq)
1450 {
1451 DECODE_HEAD;
1452
1453 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1454 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1455 READ32(seq->seqid);
1456 READ32(seq->slotid);
1457 READ32(seq->maxslots);
1458 READ32(seq->cachethis);
1459
1460 DECODE_TAIL;
1461 }
1462
1463 static __be32
1464 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1465 {
1466 int i;
1467 __be32 *p, status;
1468 struct nfsd4_test_stateid_id *stateid;
1469
1470 READ_BUF(4);
1471 test_stateid->ts_num_ids = ntohl(*p++);
1472
1473 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1474
1475 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1476 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1477 if (!stateid) {
1478 status = nfserrno(-ENOMEM);
1479 goto out;
1480 }
1481
1482 defer_free(argp, kfree, stateid);
1483 INIT_LIST_HEAD(&stateid->ts_id_list);
1484 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1485
1486 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1487 if (status)
1488 goto out;
1489 }
1490
1491 status = 0;
1492 out:
1493 return status;
1494 xdr_error:
1495 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1496 status = nfserr_bad_xdr;
1497 goto out;
1498 }
1499
1500 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1501 {
1502 DECODE_HEAD;
1503
1504 READ_BUF(8);
1505 COPYMEM(&dc->clientid, 8);
1506
1507 DECODE_TAIL;
1508 }
1509
1510 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1511 {
1512 DECODE_HEAD;
1513
1514 READ_BUF(4);
1515 READ32(rc->rca_one_fs);
1516
1517 DECODE_TAIL;
1518 }
1519
1520 static __be32
1521 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1522 {
1523 return nfs_ok;
1524 }
1525
1526 static __be32
1527 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1528 {
1529 return nfserr_notsupp;
1530 }
1531
1532 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1533
1534 static nfsd4_dec nfsd4_dec_ops[] = {
1535 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1536 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1537 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1538 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1539 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1540 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1541 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1542 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1543 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1544 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1545 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1546 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1547 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1548 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1549 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1550 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1551 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1552 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1553 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1554 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1555 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1556 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1557 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1558 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1559 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1560 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1561 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1562 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1563 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1565 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1566 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1567 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1568 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1569 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1570 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1571 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1572
1573 /* new operations for NFSv4.1 */
1574 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1575 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1576 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1577 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1578 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1579 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1580 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1586 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1587 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1588 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1590 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1591 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1592 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1593 };
1594
1595 static inline bool
1596 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1597 {
1598 if (op->opnum < FIRST_NFS4_OP)
1599 return false;
1600 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1601 return false;
1602 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1603 return false;
1604 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1605 return false;
1606 return true;
1607 }
1608
1609 /*
1610 * Return a rough estimate of the maximum possible reply size. Note the
1611 * estimate includes rpc headers so is meant to be passed to
1612 * svc_reserve, not svc_reserve_auth.
1613 *
1614 * Also note the current compound encoding permits only one operation to
1615 * use pages beyond the first one, so the maximum possible length is the
1616 * maximum over these values, not the sum.
1617 */
1618 static int nfsd4_max_reply(u32 opnum)
1619 {
1620 switch (opnum) {
1621 case OP_READLINK:
1622 case OP_READDIR:
1623 /*
1624 * Both of these ops take a single page for data and put
1625 * the head and tail in another page:
1626 */
1627 return 2 * PAGE_SIZE;
1628 case OP_READ:
1629 return INT_MAX;
1630 default:
1631 return PAGE_SIZE;
1632 }
1633 }
1634
1635 static __be32
1636 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1637 {
1638 DECODE_HEAD;
1639 struct nfsd4_op *op;
1640 bool cachethis = false;
1641 int max_reply = PAGE_SIZE;
1642 int i;
1643
1644 READ_BUF(4);
1645 READ32(argp->taglen);
1646 READ_BUF(argp->taglen + 8);
1647 SAVEMEM(argp->tag, argp->taglen);
1648 READ32(argp->minorversion);
1649 READ32(argp->opcnt);
1650
1651 if (argp->taglen > NFSD4_MAX_TAGLEN)
1652 goto xdr_error;
1653 if (argp->opcnt > 100)
1654 goto xdr_error;
1655
1656 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1657 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1658 if (!argp->ops) {
1659 argp->ops = argp->iops;
1660 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1661 goto xdr_error;
1662 }
1663 }
1664
1665 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1666 argp->opcnt = 0;
1667
1668 for (i = 0; i < argp->opcnt; i++) {
1669 op = &argp->ops[i];
1670 op->replay = NULL;
1671
1672 READ_BUF(4);
1673 READ32(op->opnum);
1674
1675 if (nfsd4_opnum_in_range(argp, op))
1676 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1677 else {
1678 op->opnum = OP_ILLEGAL;
1679 op->status = nfserr_op_illegal;
1680 }
1681
1682 if (op->status) {
1683 argp->opcnt = i+1;
1684 break;
1685 }
1686 /*
1687 * We'll try to cache the result in the DRC if any one
1688 * op in the compound wants to be cached:
1689 */
1690 cachethis |= nfsd4_cache_this_op(op);
1691
1692 max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
1693 }
1694 /* Sessions make the DRC unnecessary: */
1695 if (argp->minorversion)
1696 cachethis = false;
1697 if (max_reply != INT_MAX)
1698 svc_reserve(argp->rqstp, max_reply);
1699 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1700
1701 DECODE_TAIL;
1702 }
1703
1704 #define WRITE32(n) *p++ = htonl(n)
1705 #define WRITE64(n) do { \
1706 *p++ = htonl((u32)((n) >> 32)); \
1707 *p++ = htonl((u32)(n)); \
1708 } while (0)
1709 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1710 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1711 memcpy(p, ptr, nbytes); \
1712 p += XDR_QUADLEN(nbytes); \
1713 }} while (0)
1714
1715 static void write32(__be32 **p, u32 n)
1716 {
1717 *(*p)++ = htonl(n);
1718 }
1719
1720 static void write64(__be32 **p, u64 n)
1721 {
1722 write32(p, (n >> 32));
1723 write32(p, (u32)n);
1724 }
1725
1726 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1727 {
1728 if (IS_I_VERSION(inode)) {
1729 write64(p, inode->i_version);
1730 } else {
1731 write32(p, stat->ctime.tv_sec);
1732 write32(p, stat->ctime.tv_nsec);
1733 }
1734 }
1735
1736 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1737 {
1738 write32(p, c->atomic);
1739 if (c->change_supported) {
1740 write64(p, c->before_change);
1741 write64(p, c->after_change);
1742 } else {
1743 write32(p, c->before_ctime_sec);
1744 write32(p, c->before_ctime_nsec);
1745 write32(p, c->after_ctime_sec);
1746 write32(p, c->after_ctime_nsec);
1747 }
1748 }
1749
1750 #define RESERVE_SPACE(nbytes) do { \
1751 p = resp->p; \
1752 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1753 } while (0)
1754 #define ADJUST_ARGS() resp->p = p
1755
1756 /* Encode as an array of strings the string given with components
1757 * separated @sep, escaped with esc_enter and esc_exit.
1758 */
1759 static __be32 nfsd4_encode_components_esc(char sep, char *components,
1760 __be32 **pp, int *buflen,
1761 char esc_enter, char esc_exit)
1762 {
1763 __be32 *p = *pp;
1764 __be32 *countp = p;
1765 int strlen, count=0;
1766 char *str, *end, *next;
1767
1768 dprintk("nfsd4_encode_components(%s)\n", components);
1769 if ((*buflen -= 4) < 0)
1770 return nfserr_resource;
1771 WRITE32(0); /* We will fill this in with @count later */
1772 end = str = components;
1773 while (*end) {
1774 bool found_esc = false;
1775
1776 /* try to parse as esc_start, ..., esc_end, sep */
1777 if (*str == esc_enter) {
1778 for (; *end && (*end != esc_exit); end++)
1779 /* find esc_exit or end of string */;
1780 next = end + 1;
1781 if (*end && (!*next || *next == sep)) {
1782 str++;
1783 found_esc = true;
1784 }
1785 }
1786
1787 if (!found_esc)
1788 for (; *end && (*end != sep); end++)
1789 /* find sep or end of string */;
1790
1791 strlen = end - str;
1792 if (strlen) {
1793 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1794 return nfserr_resource;
1795 WRITE32(strlen);
1796 WRITEMEM(str, strlen);
1797 count++;
1798 }
1799 else
1800 end++;
1801 str = end;
1802 }
1803 *pp = p;
1804 p = countp;
1805 WRITE32(count);
1806 return 0;
1807 }
1808
1809 /* Encode as an array of strings the string given with components
1810 * separated @sep.
1811 */
1812 static __be32 nfsd4_encode_components(char sep, char *components,
1813 __be32 **pp, int *buflen)
1814 {
1815 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1816 }
1817
1818 /*
1819 * encode a location element of a fs_locations structure
1820 */
1821 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1822 __be32 **pp, int *buflen)
1823 {
1824 __be32 status;
1825 __be32 *p = *pp;
1826
1827 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1828 '[', ']');
1829 if (status)
1830 return status;
1831 status = nfsd4_encode_components('/', location->path, &p, buflen);
1832 if (status)
1833 return status;
1834 *pp = p;
1835 return 0;
1836 }
1837
1838 /*
1839 * Encode a path in RFC3530 'pathname4' format
1840 */
1841 static __be32 nfsd4_encode_path(const struct path *root,
1842 const struct path *path, __be32 **pp, int *buflen)
1843 {
1844 struct path cur = *path;
1845 __be32 *p = *pp;
1846 struct dentry **components = NULL;
1847 unsigned int ncomponents = 0;
1848 __be32 err = nfserr_jukebox;
1849
1850 dprintk("nfsd4_encode_components(");
1851
1852 path_get(&cur);
1853 /* First walk the path up to the nfsd root, and store the
1854 * dentries/path components in an array.
1855 */
1856 for (;;) {
1857 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1858 break;
1859 if (cur.dentry == cur.mnt->mnt_root) {
1860 if (follow_up(&cur))
1861 continue;
1862 goto out_free;
1863 }
1864 if ((ncomponents & 15) == 0) {
1865 struct dentry **new;
1866 new = krealloc(components,
1867 sizeof(*new) * (ncomponents + 16),
1868 GFP_KERNEL);
1869 if (!new)
1870 goto out_free;
1871 components = new;
1872 }
1873 components[ncomponents++] = cur.dentry;
1874 cur.dentry = dget_parent(cur.dentry);
1875 }
1876
1877 *buflen -= 4;
1878 if (*buflen < 0)
1879 goto out_free;
1880 WRITE32(ncomponents);
1881
1882 while (ncomponents) {
1883 struct dentry *dentry = components[ncomponents - 1];
1884 unsigned int len;
1885
1886 spin_lock(&dentry->d_lock);
1887 len = dentry->d_name.len;
1888 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1889 if (*buflen < 0) {
1890 spin_unlock(&dentry->d_lock);
1891 goto out_free;
1892 }
1893 WRITE32(len);
1894 WRITEMEM(dentry->d_name.name, len);
1895 dprintk("/%s", dentry->d_name.name);
1896 spin_unlock(&dentry->d_lock);
1897 dput(dentry);
1898 ncomponents--;
1899 }
1900
1901 *pp = p;
1902 err = 0;
1903 out_free:
1904 dprintk(")\n");
1905 while (ncomponents)
1906 dput(components[--ncomponents]);
1907 kfree(components);
1908 path_put(&cur);
1909 return err;
1910 }
1911
1912 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1913 const struct path *path, __be32 **pp, int *buflen)
1914 {
1915 struct svc_export *exp_ps;
1916 __be32 res;
1917
1918 exp_ps = rqst_find_fsidzero_export(rqstp);
1919 if (IS_ERR(exp_ps))
1920 return nfserrno(PTR_ERR(exp_ps));
1921 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1922 exp_put(exp_ps);
1923 return res;
1924 }
1925
1926 /*
1927 * encode a fs_locations structure
1928 */
1929 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1930 struct svc_export *exp,
1931 __be32 **pp, int *buflen)
1932 {
1933 __be32 status;
1934 int i;
1935 __be32 *p = *pp;
1936 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1937
1938 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1939 if (status)
1940 return status;
1941 if ((*buflen -= 4) < 0)
1942 return nfserr_resource;
1943 WRITE32(fslocs->locations_count);
1944 for (i=0; i<fslocs->locations_count; i++) {
1945 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1946 &p, buflen);
1947 if (status)
1948 return status;
1949 }
1950 *pp = p;
1951 return 0;
1952 }
1953
1954 static u32 nfs4_file_type(umode_t mode)
1955 {
1956 switch (mode & S_IFMT) {
1957 case S_IFIFO: return NF4FIFO;
1958 case S_IFCHR: return NF4CHR;
1959 case S_IFDIR: return NF4DIR;
1960 case S_IFBLK: return NF4BLK;
1961 case S_IFLNK: return NF4LNK;
1962 case S_IFREG: return NF4REG;
1963 case S_IFSOCK: return NF4SOCK;
1964 default: return NF4BAD;
1965 };
1966 }
1967
1968 static inline __be32
1969 nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
1970 __be32 **p, int *buflen)
1971 {
1972 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1973 return nfs4_acl_write_who(ace->whotype, p, buflen);
1974 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1975 return nfsd4_encode_group(rqstp, ace->who_gid, p, buflen);
1976 else
1977 return nfsd4_encode_user(rqstp, ace->who_uid, p, buflen);
1978 }
1979
1980 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1981 FATTR4_WORD0_RDATTR_ERROR)
1982 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1983
1984 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1985 static inline __be32
1986 nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
1987 {
1988 __be32 *p = *pp;
1989
1990 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
1991 return nfserr_resource;
1992
1993 /*
1994 * For now we use a 0 here to indicate the null translation; in
1995 * the future we may place a call to translation code here.
1996 */
1997 if ((*buflen -= 8) < 0)
1998 return nfserr_resource;
1999
2000 WRITE32(0); /* lfs */
2001 WRITE32(0); /* pi */
2002 p = xdr_encode_opaque(p, context, len);
2003 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2004
2005 *pp = p;
2006 return 0;
2007 }
2008 #else
2009 static inline __be32
2010 nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
2011 { return 0; }
2012 #endif
2013
2014 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2015 {
2016 /* As per referral draft: */
2017 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2018 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2019 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2020 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2021 *rdattr_err = NFSERR_MOVED;
2022 else
2023 return nfserr_moved;
2024 }
2025 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2026 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2027 return 0;
2028 }
2029
2030
2031 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2032 {
2033 struct path path = exp->ex_path;
2034 int err;
2035
2036 path_get(&path);
2037 while (follow_up(&path)) {
2038 if (path.dentry != path.mnt->mnt_root)
2039 break;
2040 }
2041 err = vfs_getattr(&path, stat);
2042 path_put(&path);
2043 return err;
2044 }
2045
2046 /*
2047 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2048 * ourselves.
2049 *
2050 * countp is the buffer size in _words_
2051 */
2052 __be32
2053 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2054 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
2055 struct svc_rqst *rqstp, int ignore_crossmnt)
2056 {
2057 u32 bmval0 = bmval[0];
2058 u32 bmval1 = bmval[1];
2059 u32 bmval2 = bmval[2];
2060 struct kstat stat;
2061 struct svc_fh *tempfh = NULL;
2062 struct kstatfs statfs;
2063 int buflen = count << 2;
2064 __be32 *attrlenp;
2065 u32 dummy;
2066 u64 dummy64;
2067 u32 rdattr_err = 0;
2068 __be32 *p = *buffer;
2069 __be32 status;
2070 int err;
2071 int aclsupport = 0;
2072 struct nfs4_acl *acl = NULL;
2073 void *context = NULL;
2074 int contextlen;
2075 bool contextsupport = false;
2076 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2077 u32 minorversion = resp->cstate.minorversion;
2078 struct path path = {
2079 .mnt = exp->ex_path.mnt,
2080 .dentry = dentry,
2081 };
2082 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2083
2084 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2085 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2086 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2087 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2088
2089 if (exp->ex_fslocs.migrated) {
2090 BUG_ON(bmval[2]);
2091 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2092 if (status)
2093 goto out;
2094 }
2095
2096 err = vfs_getattr(&path, &stat);
2097 if (err)
2098 goto out_nfserr;
2099 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2100 FATTR4_WORD0_MAXNAME)) ||
2101 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2102 FATTR4_WORD1_SPACE_TOTAL))) {
2103 err = vfs_statfs(&path, &statfs);
2104 if (err)
2105 goto out_nfserr;
2106 }
2107 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2108 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2109 status = nfserr_jukebox;
2110 if (!tempfh)
2111 goto out;
2112 fh_init(tempfh, NFS4_FHSIZE);
2113 status = fh_compose(tempfh, exp, dentry, NULL);
2114 if (status)
2115 goto out;
2116 fhp = tempfh;
2117 }
2118 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2119 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2120 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2121 aclsupport = (err == 0);
2122 if (bmval0 & FATTR4_WORD0_ACL) {
2123 if (err == -EOPNOTSUPP)
2124 bmval0 &= ~FATTR4_WORD0_ACL;
2125 else if (err == -EINVAL) {
2126 status = nfserr_attrnotsupp;
2127 goto out;
2128 } else if (err != 0)
2129 goto out_nfserr;
2130 }
2131 }
2132
2133 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2134 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2135 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2136 err = security_inode_getsecctx(dentry->d_inode,
2137 &context, &contextlen);
2138 contextsupport = (err == 0);
2139 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2140 if (err == -EOPNOTSUPP)
2141 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2142 else if (err)
2143 goto out_nfserr;
2144 }
2145 }
2146 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2147
2148 if (bmval2) {
2149 if ((buflen -= 16) < 0)
2150 goto out_resource;
2151 WRITE32(3);
2152 WRITE32(bmval0);
2153 WRITE32(bmval1);
2154 WRITE32(bmval2);
2155 } else if (bmval1) {
2156 if ((buflen -= 12) < 0)
2157 goto out_resource;
2158 WRITE32(2);
2159 WRITE32(bmval0);
2160 WRITE32(bmval1);
2161 } else {
2162 if ((buflen -= 8) < 0)
2163 goto out_resource;
2164 WRITE32(1);
2165 WRITE32(bmval0);
2166 }
2167 attrlenp = p++; /* to be backfilled later */
2168
2169 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2170 u32 word0 = nfsd_suppattrs0(minorversion);
2171 u32 word1 = nfsd_suppattrs1(minorversion);
2172 u32 word2 = nfsd_suppattrs2(minorversion);
2173
2174 if (!aclsupport)
2175 word0 &= ~FATTR4_WORD0_ACL;
2176 if (!contextsupport)
2177 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2178 if (!word2) {
2179 if ((buflen -= 12) < 0)
2180 goto out_resource;
2181 WRITE32(2);
2182 WRITE32(word0);
2183 WRITE32(word1);
2184 } else {
2185 if ((buflen -= 16) < 0)
2186 goto out_resource;
2187 WRITE32(3);
2188 WRITE32(word0);
2189 WRITE32(word1);
2190 WRITE32(word2);
2191 }
2192 }
2193 if (bmval0 & FATTR4_WORD0_TYPE) {
2194 if ((buflen -= 4) < 0)
2195 goto out_resource;
2196 dummy = nfs4_file_type(stat.mode);
2197 if (dummy == NF4BAD) {
2198 status = nfserr_serverfault;
2199 goto out;
2200 }
2201 WRITE32(dummy);
2202 }
2203 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2204 if ((buflen -= 4) < 0)
2205 goto out_resource;
2206 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2207 WRITE32(NFS4_FH_PERSISTENT);
2208 else
2209 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2210 }
2211 if (bmval0 & FATTR4_WORD0_CHANGE) {
2212 if ((buflen -= 8) < 0)
2213 goto out_resource;
2214 write_change(&p, &stat, dentry->d_inode);
2215 }
2216 if (bmval0 & FATTR4_WORD0_SIZE) {
2217 if ((buflen -= 8) < 0)
2218 goto out_resource;
2219 WRITE64(stat.size);
2220 }
2221 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2222 if ((buflen -= 4) < 0)
2223 goto out_resource;
2224 WRITE32(1);
2225 }
2226 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2227 if ((buflen -= 4) < 0)
2228 goto out_resource;
2229 WRITE32(1);
2230 }
2231 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2232 if ((buflen -= 4) < 0)
2233 goto out_resource;
2234 WRITE32(0);
2235 }
2236 if (bmval0 & FATTR4_WORD0_FSID) {
2237 if ((buflen -= 16) < 0)
2238 goto out_resource;
2239 if (exp->ex_fslocs.migrated) {
2240 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2241 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2242 } else switch(fsid_source(fhp)) {
2243 case FSIDSOURCE_FSID:
2244 WRITE64((u64)exp->ex_fsid);
2245 WRITE64((u64)0);
2246 break;
2247 case FSIDSOURCE_DEV:
2248 WRITE32(0);
2249 WRITE32(MAJOR(stat.dev));
2250 WRITE32(0);
2251 WRITE32(MINOR(stat.dev));
2252 break;
2253 case FSIDSOURCE_UUID:
2254 WRITEMEM(exp->ex_uuid, 16);
2255 break;
2256 }
2257 }
2258 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2259 if ((buflen -= 4) < 0)
2260 goto out_resource;
2261 WRITE32(0);
2262 }
2263 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2264 if ((buflen -= 4) < 0)
2265 goto out_resource;
2266 WRITE32(nn->nfsd4_lease);
2267 }
2268 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2269 if ((buflen -= 4) < 0)
2270 goto out_resource;
2271 WRITE32(rdattr_err);
2272 }
2273 if (bmval0 & FATTR4_WORD0_ACL) {
2274 struct nfs4_ace *ace;
2275
2276 if (acl == NULL) {
2277 if ((buflen -= 4) < 0)
2278 goto out_resource;
2279
2280 WRITE32(0);
2281 goto out_acl;
2282 }
2283 if ((buflen -= 4) < 0)
2284 goto out_resource;
2285 WRITE32(acl->naces);
2286
2287 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2288 if ((buflen -= 4*3) < 0)
2289 goto out_resource;
2290 WRITE32(ace->type);
2291 WRITE32(ace->flag);
2292 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2293 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
2294 if (status)
2295 goto out;
2296 }
2297 }
2298 out_acl:
2299 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2300 if ((buflen -= 4) < 0)
2301 goto out_resource;
2302 WRITE32(aclsupport ?
2303 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2304 }
2305 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2306 if ((buflen -= 4) < 0)
2307 goto out_resource;
2308 WRITE32(1);
2309 }
2310 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2311 if ((buflen -= 4) < 0)
2312 goto out_resource;
2313 WRITE32(0);
2314 }
2315 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2316 if ((buflen -= 4) < 0)
2317 goto out_resource;
2318 WRITE32(1);
2319 }
2320 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2321 if ((buflen -= 4) < 0)
2322 goto out_resource;
2323 WRITE32(1);
2324 }
2325 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2326 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2327 if (buflen < 0)
2328 goto out_resource;
2329 WRITE32(fhp->fh_handle.fh_size);
2330 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2331 }
2332 if (bmval0 & FATTR4_WORD0_FILEID) {
2333 if ((buflen -= 8) < 0)
2334 goto out_resource;
2335 WRITE64(stat.ino);
2336 }
2337 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2338 if ((buflen -= 8) < 0)
2339 goto out_resource;
2340 WRITE64((u64) statfs.f_ffree);
2341 }
2342 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2343 if ((buflen -= 8) < 0)
2344 goto out_resource;
2345 WRITE64((u64) statfs.f_ffree);
2346 }
2347 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2348 if ((buflen -= 8) < 0)
2349 goto out_resource;
2350 WRITE64((u64) statfs.f_files);
2351 }
2352 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2353 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2354 if (status)
2355 goto out;
2356 }
2357 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2358 if ((buflen -= 4) < 0)
2359 goto out_resource;
2360 WRITE32(1);
2361 }
2362 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2363 if ((buflen -= 8) < 0)
2364 goto out_resource;
2365 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
2366 }
2367 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2368 if ((buflen -= 4) < 0)
2369 goto out_resource;
2370 WRITE32(255);
2371 }
2372 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2373 if ((buflen -= 4) < 0)
2374 goto out_resource;
2375 WRITE32(statfs.f_namelen);
2376 }
2377 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2378 if ((buflen -= 8) < 0)
2379 goto out_resource;
2380 WRITE64((u64) svc_max_payload(rqstp));
2381 }
2382 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2383 if ((buflen -= 8) < 0)
2384 goto out_resource;
2385 WRITE64((u64) svc_max_payload(rqstp));
2386 }
2387 if (bmval1 & FATTR4_WORD1_MODE) {
2388 if ((buflen -= 4) < 0)
2389 goto out_resource;
2390 WRITE32(stat.mode & S_IALLUGO);
2391 }
2392 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2393 if ((buflen -= 4) < 0)
2394 goto out_resource;
2395 WRITE32(1);
2396 }
2397 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2398 if ((buflen -= 4) < 0)
2399 goto out_resource;
2400 WRITE32(stat.nlink);
2401 }
2402 if (bmval1 & FATTR4_WORD1_OWNER) {
2403 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2404 if (status)
2405 goto out;
2406 }
2407 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2408 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2409 if (status)
2410 goto out;
2411 }
2412 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2413 if ((buflen -= 8) < 0)
2414 goto out_resource;
2415 WRITE32((u32) MAJOR(stat.rdev));
2416 WRITE32((u32) MINOR(stat.rdev));
2417 }
2418 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2419 if ((buflen -= 8) < 0)
2420 goto out_resource;
2421 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2422 WRITE64(dummy64);
2423 }
2424 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2425 if ((buflen -= 8) < 0)
2426 goto out_resource;
2427 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2428 WRITE64(dummy64);
2429 }
2430 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2431 if ((buflen -= 8) < 0)
2432 goto out_resource;
2433 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2434 WRITE64(dummy64);
2435 }
2436 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2437 if ((buflen -= 8) < 0)
2438 goto out_resource;
2439 dummy64 = (u64)stat.blocks << 9;
2440 WRITE64(dummy64);
2441 }
2442 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2443 if ((buflen -= 12) < 0)
2444 goto out_resource;
2445 WRITE64((s64)stat.atime.tv_sec);
2446 WRITE32(stat.atime.tv_nsec);
2447 }
2448 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2449 if ((buflen -= 12) < 0)
2450 goto out_resource;
2451 WRITE32(0);
2452 WRITE32(1);
2453 WRITE32(0);
2454 }
2455 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2456 if ((buflen -= 12) < 0)
2457 goto out_resource;
2458 WRITE64((s64)stat.ctime.tv_sec);
2459 WRITE32(stat.ctime.tv_nsec);
2460 }
2461 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2462 if ((buflen -= 12) < 0)
2463 goto out_resource;
2464 WRITE64((s64)stat.mtime.tv_sec);
2465 WRITE32(stat.mtime.tv_nsec);
2466 }
2467 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2468 if ((buflen -= 8) < 0)
2469 goto out_resource;
2470 /*
2471 * Get parent's attributes if not ignoring crossmount
2472 * and this is the root of a cross-mounted filesystem.
2473 */
2474 if (ignore_crossmnt == 0 &&
2475 dentry == exp->ex_path.mnt->mnt_root)
2476 get_parent_attributes(exp, &stat);
2477 WRITE64(stat.ino);
2478 }
2479 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2480 status = nfsd4_encode_security_label(rqstp, context,
2481 contextlen, &p, &buflen);
2482 if (status)
2483 goto out;
2484 }
2485 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2486 WRITE32(3);
2487 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2488 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2489 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2490 }
2491
2492 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2493 *buffer = p;
2494 status = nfs_ok;
2495
2496 out:
2497 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2498 if (context)
2499 security_release_secctx(context, contextlen);
2500 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2501 kfree(acl);
2502 if (tempfh)
2503 fh_put(tempfh);
2504 return status;
2505 out_nfserr:
2506 status = nfserrno(err);
2507 goto out;
2508 out_resource:
2509 status = nfserr_resource;
2510 goto out;
2511 }
2512
2513 static inline int attributes_need_mount(u32 *bmval)
2514 {
2515 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2516 return 1;
2517 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2518 return 1;
2519 return 0;
2520 }
2521
2522 static __be32
2523 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2524 const char *name, int namlen, __be32 **p, int buflen)
2525 {
2526 struct svc_export *exp = cd->rd_fhp->fh_export;
2527 struct dentry *dentry;
2528 __be32 nfserr;
2529 int ignore_crossmnt = 0;
2530
2531 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2532 if (IS_ERR(dentry))
2533 return nfserrno(PTR_ERR(dentry));
2534 if (!dentry->d_inode) {
2535 /*
2536 * nfsd_buffered_readdir drops the i_mutex between
2537 * readdir and calling this callback, leaving a window
2538 * where this directory entry could have gone away.
2539 */
2540 dput(dentry);
2541 return nfserr_noent;
2542 }
2543
2544 exp_get(exp);
2545 /*
2546 * In the case of a mountpoint, the client may be asking for
2547 * attributes that are only properties of the underlying filesystem
2548 * as opposed to the cross-mounted file system. In such a case,
2549 * we will not follow the cross mount and will fill the attribtutes
2550 * directly from the mountpoint dentry.
2551 */
2552 if (nfsd_mountpoint(dentry, exp)) {
2553 int err;
2554
2555 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2556 && !attributes_need_mount(cd->rd_bmval)) {
2557 ignore_crossmnt = 1;
2558 goto out_encode;
2559 }
2560 /*
2561 * Why the heck aren't we just using nfsd_lookup??
2562 * Different "."/".." handling? Something else?
2563 * At least, add a comment here to explain....
2564 */
2565 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2566 if (err) {
2567 nfserr = nfserrno(err);
2568 goto out_put;
2569 }
2570 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2571 if (nfserr)
2572 goto out_put;
2573
2574 }
2575 out_encode:
2576 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2577 cd->rd_rqstp, ignore_crossmnt);
2578 out_put:
2579 dput(dentry);
2580 exp_put(exp);
2581 return nfserr;
2582 }
2583
2584 static __be32 *
2585 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2586 {
2587 if (buflen < 6)
2588 return NULL;
2589 *p++ = htonl(2);
2590 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2591 *p++ = htonl(0); /* bmval1 */
2592
2593 *p++ = htonl(4); /* attribute length */
2594 *p++ = nfserr; /* no htonl */
2595 return p;
2596 }
2597
2598 static int
2599 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2600 loff_t offset, u64 ino, unsigned int d_type)
2601 {
2602 struct readdir_cd *ccd = ccdv;
2603 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2604 int buflen;
2605 __be32 *p = cd->buffer;
2606 __be32 *cookiep;
2607 __be32 nfserr = nfserr_toosmall;
2608
2609 /* In nfsv4, "." and ".." never make it onto the wire.. */
2610 if (name && isdotent(name, namlen)) {
2611 cd->common.err = nfs_ok;
2612 return 0;
2613 }
2614
2615 if (cd->offset)
2616 xdr_encode_hyper(cd->offset, (u64) offset);
2617
2618 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2619 if (buflen < 0)
2620 goto fail;
2621
2622 *p++ = xdr_one; /* mark entry present */
2623 cookiep = p;
2624 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2625 p = xdr_encode_array(p, name, namlen); /* name length & name */
2626
2627 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
2628 switch (nfserr) {
2629 case nfs_ok:
2630 break;
2631 case nfserr_resource:
2632 nfserr = nfserr_toosmall;
2633 goto fail;
2634 case nfserr_noent:
2635 goto skip_entry;
2636 default:
2637 /*
2638 * If the client requested the RDATTR_ERROR attribute,
2639 * we stuff the error code into this attribute
2640 * and continue. If this attribute was not requested,
2641 * then in accordance with the spec, we fail the
2642 * entire READDIR operation(!)
2643 */
2644 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2645 goto fail;
2646 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2647 if (p == NULL) {
2648 nfserr = nfserr_toosmall;
2649 goto fail;
2650 }
2651 }
2652 cd->buflen -= (p - cd->buffer);
2653 cd->buffer = p;
2654 cd->offset = cookiep;
2655 skip_entry:
2656 cd->common.err = nfs_ok;
2657 return 0;
2658 fail:
2659 cd->common.err = nfserr;
2660 return -EINVAL;
2661 }
2662
2663 static void
2664 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2665 {
2666 __be32 *p;
2667
2668 RESERVE_SPACE(sizeof(stateid_t));
2669 WRITE32(sid->si_generation);
2670 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2671 ADJUST_ARGS();
2672 }
2673
2674 static __be32
2675 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2676 {
2677 __be32 *p;
2678
2679 if (!nfserr) {
2680 RESERVE_SPACE(8);
2681 WRITE32(access->ac_supported);
2682 WRITE32(access->ac_resp_access);
2683 ADJUST_ARGS();
2684 }
2685 return nfserr;
2686 }
2687
2688 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2689 {
2690 __be32 *p;
2691
2692 if (!nfserr) {
2693 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2694 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2695 WRITE32(bcts->dir);
2696 /* Sorry, we do not yet support RDMA over 4.1: */
2697 WRITE32(0);
2698 ADJUST_ARGS();
2699 }
2700 return nfserr;
2701 }
2702
2703 static __be32
2704 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2705 {
2706 if (!nfserr)
2707 nfsd4_encode_stateid(resp, &close->cl_stateid);
2708
2709 return nfserr;
2710 }
2711
2712
2713 static __be32
2714 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2715 {
2716 __be32 *p;
2717
2718 if (!nfserr) {
2719 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2720 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
2721 ADJUST_ARGS();
2722 }
2723 return nfserr;
2724 }
2725
2726 static __be32
2727 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2728 {
2729 __be32 *p;
2730
2731 if (!nfserr) {
2732 RESERVE_SPACE(32);
2733 write_cinfo(&p, &create->cr_cinfo);
2734 WRITE32(2);
2735 WRITE32(create->cr_bmval[0]);
2736 WRITE32(create->cr_bmval[1]);
2737 ADJUST_ARGS();
2738 }
2739 return nfserr;
2740 }
2741
2742 static __be32
2743 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2744 {
2745 struct svc_fh *fhp = getattr->ga_fhp;
2746 int buflen;
2747
2748 if (nfserr)
2749 return nfserr;
2750
2751 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2752 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2753 &resp->p, buflen, getattr->ga_bmval,
2754 resp->rqstp, 0);
2755 return nfserr;
2756 }
2757
2758 static __be32
2759 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2760 {
2761 struct svc_fh *fhp = *fhpp;
2762 unsigned int len;
2763 __be32 *p;
2764
2765 if (!nfserr) {
2766 len = fhp->fh_handle.fh_size;
2767 RESERVE_SPACE(len + 4);
2768 WRITE32(len);
2769 WRITEMEM(&fhp->fh_handle.fh_base, len);
2770 ADJUST_ARGS();
2771 }
2772 return nfserr;
2773 }
2774
2775 /*
2776 * Including all fields other than the name, a LOCK4denied structure requires
2777 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2778 */
2779 static void
2780 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2781 {
2782 struct xdr_netobj *conf = &ld->ld_owner;
2783 __be32 *p;
2784
2785 RESERVE_SPACE(32 + XDR_LEN(conf->len));
2786 WRITE64(ld->ld_start);
2787 WRITE64(ld->ld_length);
2788 WRITE32(ld->ld_type);
2789 if (conf->len) {
2790 WRITEMEM(&ld->ld_clientid, 8);
2791 WRITE32(conf->len);
2792 WRITEMEM(conf->data, conf->len);
2793 kfree(conf->data);
2794 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2795 WRITE64((u64)0); /* clientid */
2796 WRITE32(0); /* length of owner name */
2797 }
2798 ADJUST_ARGS();
2799 }
2800
2801 static __be32
2802 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2803 {
2804 if (!nfserr)
2805 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2806 else if (nfserr == nfserr_denied)
2807 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2808
2809 return nfserr;
2810 }
2811
2812 static __be32
2813 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2814 {
2815 if (nfserr == nfserr_denied)
2816 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2817 return nfserr;
2818 }
2819
2820 static __be32
2821 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2822 {
2823 if (!nfserr)
2824 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2825
2826 return nfserr;
2827 }
2828
2829
2830 static __be32
2831 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2832 {
2833 __be32 *p;
2834
2835 if (!nfserr) {
2836 RESERVE_SPACE(20);
2837 write_cinfo(&p, &link->li_cinfo);
2838 ADJUST_ARGS();
2839 }
2840 return nfserr;
2841 }
2842
2843
2844 static __be32
2845 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2846 {
2847 __be32 *p;
2848
2849 if (nfserr)
2850 goto out;
2851
2852 nfsd4_encode_stateid(resp, &open->op_stateid);
2853 RESERVE_SPACE(40);
2854 write_cinfo(&p, &open->op_cinfo);
2855 WRITE32(open->op_rflags);
2856 WRITE32(2);
2857 WRITE32(open->op_bmval[0]);
2858 WRITE32(open->op_bmval[1]);
2859 WRITE32(open->op_delegate_type);
2860 ADJUST_ARGS();
2861
2862 switch (open->op_delegate_type) {
2863 case NFS4_OPEN_DELEGATE_NONE:
2864 break;
2865 case NFS4_OPEN_DELEGATE_READ:
2866 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2867 RESERVE_SPACE(20);
2868 WRITE32(open->op_recall);
2869
2870 /*
2871 * TODO: ACE's in delegations
2872 */
2873 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2874 WRITE32(0);
2875 WRITE32(0);
2876 WRITE32(0); /* XXX: is NULL principal ok? */
2877 ADJUST_ARGS();
2878 break;
2879 case NFS4_OPEN_DELEGATE_WRITE:
2880 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2881 RESERVE_SPACE(32);
2882 WRITE32(0);
2883
2884 /*
2885 * TODO: space_limit's in delegations
2886 */
2887 WRITE32(NFS4_LIMIT_SIZE);
2888 WRITE32(~(u32)0);
2889 WRITE32(~(u32)0);
2890
2891 /*
2892 * TODO: ACE's in delegations
2893 */
2894 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2895 WRITE32(0);
2896 WRITE32(0);
2897 WRITE32(0); /* XXX: is NULL principal ok? */
2898 ADJUST_ARGS();
2899 break;
2900 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2901 switch (open->op_why_no_deleg) {
2902 case WND4_CONTENTION:
2903 case WND4_RESOURCE:
2904 RESERVE_SPACE(8);
2905 WRITE32(open->op_why_no_deleg);
2906 WRITE32(0); /* deleg signaling not supported yet */
2907 break;
2908 default:
2909 RESERVE_SPACE(4);
2910 WRITE32(open->op_why_no_deleg);
2911 }
2912 ADJUST_ARGS();
2913 break;
2914 default:
2915 BUG();
2916 }
2917 /* XXX save filehandle here */
2918 out:
2919 return nfserr;
2920 }
2921
2922 static __be32
2923 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2924 {
2925 if (!nfserr)
2926 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2927
2928 return nfserr;
2929 }
2930
2931 static __be32
2932 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2933 {
2934 if (!nfserr)
2935 nfsd4_encode_stateid(resp, &od->od_stateid);
2936
2937 return nfserr;
2938 }
2939
2940 static __be32
2941 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2942 struct nfsd4_read *read)
2943 {
2944 u32 eof;
2945 int v;
2946 struct page *page;
2947 unsigned long maxcount;
2948 long len;
2949 __be32 *p;
2950
2951 if (nfserr)
2952 return nfserr;
2953 if (resp->xbuf->page_len)
2954 return nfserr_resource;
2955
2956 RESERVE_SPACE(8); /* eof flag and byte count */
2957
2958 maxcount = svc_max_payload(resp->rqstp);
2959 if (maxcount > read->rd_length)
2960 maxcount = read->rd_length;
2961
2962 len = maxcount;
2963 v = 0;
2964 while (len > 0) {
2965 page = *(resp->rqstp->rq_next_page);
2966 if (!page) { /* ran out of pages */
2967 maxcount -= len;
2968 break;
2969 }
2970 resp->rqstp->rq_vec[v].iov_base = page_address(page);
2971 resp->rqstp->rq_vec[v].iov_len =
2972 len < PAGE_SIZE ? len : PAGE_SIZE;
2973 resp->rqstp->rq_next_page++;
2974 v++;
2975 len -= PAGE_SIZE;
2976 }
2977 read->rd_vlen = v;
2978
2979 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2980 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2981 &maxcount);
2982
2983 if (nfserr)
2984 return nfserr;
2985 eof = (read->rd_offset + maxcount >=
2986 read->rd_fhp->fh_dentry->d_inode->i_size);
2987
2988 WRITE32(eof);
2989 WRITE32(maxcount);
2990 ADJUST_ARGS();
2991 resp->xbuf->head[0].iov_len = (char*)p
2992 - (char*)resp->xbuf->head[0].iov_base;
2993 resp->xbuf->page_len = maxcount;
2994
2995 /* Use rest of head for padding and remaining ops: */
2996 resp->xbuf->tail[0].iov_base = p;
2997 resp->xbuf->tail[0].iov_len = 0;
2998 if (maxcount&3) {
2999 RESERVE_SPACE(4);
3000 WRITE32(0);
3001 resp->xbuf->tail[0].iov_base += maxcount&3;
3002 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3003 ADJUST_ARGS();
3004 }
3005 return 0;
3006 }
3007
3008 static __be32
3009 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3010 {
3011 int maxcount;
3012 char *page;
3013 __be32 *p;
3014
3015 if (nfserr)
3016 return nfserr;
3017 if (resp->xbuf->page_len)
3018 return nfserr_resource;
3019 if (!*resp->rqstp->rq_next_page)
3020 return nfserr_resource;
3021
3022 page = page_address(*(resp->rqstp->rq_next_page++));
3023
3024 maxcount = PAGE_SIZE;
3025 RESERVE_SPACE(4);
3026
3027 /*
3028 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3029 * if they would overflow the buffer. Is this kosher in NFSv4? If
3030 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3031 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3032 */
3033 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3034 if (nfserr == nfserr_isdir)
3035 return nfserr_inval;
3036 if (nfserr)
3037 return nfserr;
3038
3039 WRITE32(maxcount);
3040 ADJUST_ARGS();
3041 resp->xbuf->head[0].iov_len = (char*)p
3042 - (char*)resp->xbuf->head[0].iov_base;
3043 resp->xbuf->page_len = maxcount;
3044
3045 /* Use rest of head for padding and remaining ops: */
3046 resp->xbuf->tail[0].iov_base = p;
3047 resp->xbuf->tail[0].iov_len = 0;
3048 if (maxcount&3) {
3049 RESERVE_SPACE(4);
3050 WRITE32(0);
3051 resp->xbuf->tail[0].iov_base += maxcount&3;
3052 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3053 ADJUST_ARGS();
3054 }
3055 return 0;
3056 }
3057
3058 static __be32
3059 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3060 {
3061 int maxcount;
3062 loff_t offset;
3063 __be32 *page, *savep, *tailbase;
3064 __be32 *p;
3065
3066 if (nfserr)
3067 return nfserr;
3068 if (resp->xbuf->page_len)
3069 return nfserr_resource;
3070 if (!*resp->rqstp->rq_next_page)
3071 return nfserr_resource;
3072
3073 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
3074 savep = p;
3075
3076 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3077 WRITE32(0);
3078 WRITE32(0);
3079 ADJUST_ARGS();
3080 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
3081 tailbase = p;
3082
3083 maxcount = PAGE_SIZE;
3084 if (maxcount > readdir->rd_maxcount)
3085 maxcount = readdir->rd_maxcount;
3086
3087 /*
3088 * Convert from bytes to words, account for the two words already
3089 * written, make sure to leave two words at the end for the next
3090 * pointer and eof field.
3091 */
3092 maxcount = (maxcount >> 2) - 4;
3093 if (maxcount < 0) {
3094 nfserr = nfserr_toosmall;
3095 goto err_no_verf;
3096 }
3097
3098 page = page_address(*(resp->rqstp->rq_next_page++));
3099 readdir->common.err = 0;
3100 readdir->buflen = maxcount;
3101 readdir->buffer = page;
3102 readdir->offset = NULL;
3103
3104 offset = readdir->rd_cookie;
3105 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3106 &offset,
3107 &readdir->common, nfsd4_encode_dirent);
3108 if (nfserr == nfs_ok &&
3109 readdir->common.err == nfserr_toosmall &&
3110 readdir->buffer == page)
3111 nfserr = nfserr_toosmall;
3112 if (nfserr)
3113 goto err_no_verf;
3114
3115 if (readdir->offset)
3116 xdr_encode_hyper(readdir->offset, offset);
3117
3118 p = readdir->buffer;
3119 *p++ = 0; /* no more entries */
3120 *p++ = htonl(readdir->common.err == nfserr_eof);
3121 resp->xbuf->page_len = ((char*)p) -
3122 (char*)page_address(*(resp->rqstp->rq_next_page-1));
3123
3124 /* Use rest of head for padding and remaining ops: */
3125 resp->xbuf->tail[0].iov_base = tailbase;
3126 resp->xbuf->tail[0].iov_len = 0;
3127 resp->p = resp->xbuf->tail[0].iov_base;
3128 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
3129
3130 return 0;
3131 err_no_verf:
3132 p = savep;
3133 ADJUST_ARGS();
3134 return nfserr;
3135 }
3136
3137 static __be32
3138 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3139 {
3140 __be32 *p;
3141
3142 if (!nfserr) {
3143 RESERVE_SPACE(20);
3144 write_cinfo(&p, &remove->rm_cinfo);
3145 ADJUST_ARGS();
3146 }
3147 return nfserr;
3148 }
3149
3150 static __be32
3151 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3152 {
3153 __be32 *p;
3154
3155 if (!nfserr) {
3156 RESERVE_SPACE(40);
3157 write_cinfo(&p, &rename->rn_sinfo);
3158 write_cinfo(&p, &rename->rn_tinfo);
3159 ADJUST_ARGS();
3160 }
3161 return nfserr;
3162 }
3163
3164 static __be32
3165 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3166 __be32 nfserr, struct svc_export *exp)
3167 {
3168 u32 i, nflavs, supported;
3169 struct exp_flavor_info *flavs;
3170 struct exp_flavor_info def_flavs[2];
3171 __be32 *p, *flavorsp;
3172 static bool report = true;
3173
3174 if (nfserr)
3175 goto out;
3176 if (exp->ex_nflavors) {
3177 flavs = exp->ex_flavors;
3178 nflavs = exp->ex_nflavors;
3179 } else { /* Handling of some defaults in absence of real secinfo: */
3180 flavs = def_flavs;
3181 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3182 nflavs = 2;
3183 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3184 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3185 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3186 nflavs = 1;
3187 flavs[0].pseudoflavor
3188 = svcauth_gss_flavor(exp->ex_client);
3189 } else {
3190 nflavs = 1;
3191 flavs[0].pseudoflavor
3192 = exp->ex_client->flavour->flavour;
3193 }
3194 }
3195
3196 supported = 0;
3197 RESERVE_SPACE(4);
3198 flavorsp = p++; /* to be backfilled later */
3199 ADJUST_ARGS();
3200
3201 for (i = 0; i < nflavs; i++) {
3202 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3203 struct rpcsec_gss_info info;
3204
3205 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3206 supported++;
3207 RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
3208 WRITE32(RPC_AUTH_GSS);
3209 WRITE32(info.oid.len);
3210 WRITEMEM(info.oid.data, info.oid.len);
3211 WRITE32(info.qop);
3212 WRITE32(info.service);
3213 ADJUST_ARGS();
3214 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3215 supported++;
3216 RESERVE_SPACE(4);
3217 WRITE32(pf);
3218 ADJUST_ARGS();
3219 } else {
3220 if (report)
3221 pr_warn("NFS: SECINFO: security flavor %u "
3222 "is not supported\n", pf);
3223 }
3224 }
3225
3226 if (nflavs != supported)
3227 report = false;
3228 *flavorsp = htonl(supported);
3229
3230 out:
3231 if (exp)
3232 exp_put(exp);
3233 return nfserr;
3234 }
3235
3236 static __be32
3237 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3238 struct nfsd4_secinfo *secinfo)
3239 {
3240 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3241 }
3242
3243 static __be32
3244 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3245 struct nfsd4_secinfo_no_name *secinfo)
3246 {
3247 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3248 }
3249
3250 /*
3251 * The SETATTR encode routine is special -- it always encodes a bitmap,
3252 * regardless of the error status.
3253 */
3254 static __be32
3255 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3256 {
3257 __be32 *p;
3258
3259 RESERVE_SPACE(16);
3260 if (nfserr) {
3261 WRITE32(3);
3262 WRITE32(0);
3263 WRITE32(0);
3264 WRITE32(0);
3265 }
3266 else {
3267 WRITE32(3);
3268 WRITE32(setattr->sa_bmval[0]);
3269 WRITE32(setattr->sa_bmval[1]);
3270 WRITE32(setattr->sa_bmval[2]);
3271 }
3272 ADJUST_ARGS();
3273 return nfserr;
3274 }
3275
3276 static __be32
3277 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3278 {
3279 __be32 *p;
3280
3281 if (!nfserr) {
3282 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
3283 WRITEMEM(&scd->se_clientid, 8);
3284 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
3285 ADJUST_ARGS();
3286 }
3287 else if (nfserr == nfserr_clid_inuse) {
3288 RESERVE_SPACE(8);
3289 WRITE32(0);
3290 WRITE32(0);
3291 ADJUST_ARGS();
3292 }
3293 return nfserr;
3294 }
3295
3296 static __be32
3297 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3298 {
3299 __be32 *p;
3300
3301 if (!nfserr) {
3302 RESERVE_SPACE(16);
3303 WRITE32(write->wr_bytes_written);
3304 WRITE32(write->wr_how_written);
3305 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
3306 ADJUST_ARGS();
3307 }
3308 return nfserr;
3309 }
3310
3311 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3312 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3313 1 << (OP_EXCHANGE_ID - 32) |
3314 1 << (OP_CREATE_SESSION - 32) |
3315 1 << (OP_DESTROY_SESSION - 32) |
3316 1 << (OP_DESTROY_CLIENTID - 32)
3317 };
3318
3319 static __be32
3320 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3321 struct nfsd4_exchange_id *exid)
3322 {
3323 __be32 *p;
3324 char *major_id;
3325 char *server_scope;
3326 int major_id_sz;
3327 int server_scope_sz;
3328 uint64_t minor_id = 0;
3329
3330 if (nfserr)
3331 return nfserr;
3332
3333 major_id = utsname()->nodename;
3334 major_id_sz = strlen(major_id);
3335 server_scope = utsname()->nodename;
3336 server_scope_sz = strlen(server_scope);
3337
3338 RESERVE_SPACE(
3339 8 /* eir_clientid */ +
3340 4 /* eir_sequenceid */ +
3341 4 /* eir_flags */ +
3342 4 /* spr_how */);
3343
3344 WRITEMEM(&exid->clientid, 8);
3345 WRITE32(exid->seqid);
3346 WRITE32(exid->flags);
3347
3348 WRITE32(exid->spa_how);
3349 ADJUST_ARGS();
3350
3351 switch (exid->spa_how) {
3352 case SP4_NONE:
3353 break;
3354 case SP4_MACH_CRED:
3355 /* spo_must_enforce, spo_must_allow */
3356 RESERVE_SPACE(16);
3357
3358 /* spo_must_enforce bitmap: */
3359 WRITE32(2);
3360 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3361 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3362 /* empty spo_must_allow bitmap: */
3363 WRITE32(0);
3364
3365 ADJUST_ARGS();
3366 break;
3367 default:
3368 WARN_ON_ONCE(1);
3369 }
3370
3371 RESERVE_SPACE(
3372 8 /* so_minor_id */ +
3373 4 /* so_major_id.len */ +
3374 (XDR_QUADLEN(major_id_sz) * 4) +
3375 4 /* eir_server_scope.len */ +
3376 (XDR_QUADLEN(server_scope_sz) * 4) +
3377 4 /* eir_server_impl_id.count (0) */);
3378
3379 /* The server_owner struct */
3380 WRITE64(minor_id); /* Minor id */
3381 /* major id */
3382 WRITE32(major_id_sz);
3383 WRITEMEM(major_id, major_id_sz);
3384
3385 /* Server scope */
3386 WRITE32(server_scope_sz);
3387 WRITEMEM(server_scope, server_scope_sz);
3388
3389 /* Implementation id */
3390 WRITE32(0); /* zero length nfs_impl_id4 array */
3391 ADJUST_ARGS();
3392 return 0;
3393 }
3394
3395 static __be32
3396 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3397 struct nfsd4_create_session *sess)
3398 {
3399 __be32 *p;
3400
3401 if (nfserr)
3402 return nfserr;
3403
3404 RESERVE_SPACE(24);
3405 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3406 WRITE32(sess->seqid);
3407 WRITE32(sess->flags);
3408 ADJUST_ARGS();
3409
3410 RESERVE_SPACE(28);
3411 WRITE32(0); /* headerpadsz */
3412 WRITE32(sess->fore_channel.maxreq_sz);
3413 WRITE32(sess->fore_channel.maxresp_sz);
3414 WRITE32(sess->fore_channel.maxresp_cached);
3415 WRITE32(sess->fore_channel.maxops);
3416 WRITE32(sess->fore_channel.maxreqs);
3417 WRITE32(sess->fore_channel.nr_rdma_attrs);
3418 ADJUST_ARGS();
3419
3420 if (sess->fore_channel.nr_rdma_attrs) {
3421 RESERVE_SPACE(4);
3422 WRITE32(sess->fore_channel.rdma_attrs);
3423 ADJUST_ARGS();
3424 }
3425
3426 RESERVE_SPACE(28);
3427 WRITE32(0); /* headerpadsz */
3428 WRITE32(sess->back_channel.maxreq_sz);
3429 WRITE32(sess->back_channel.maxresp_sz);
3430 WRITE32(sess->back_channel.maxresp_cached);
3431 WRITE32(sess->back_channel.maxops);
3432 WRITE32(sess->back_channel.maxreqs);
3433 WRITE32(sess->back_channel.nr_rdma_attrs);
3434 ADJUST_ARGS();
3435
3436 if (sess->back_channel.nr_rdma_attrs) {
3437 RESERVE_SPACE(4);
3438 WRITE32(sess->back_channel.rdma_attrs);
3439 ADJUST_ARGS();
3440 }
3441 return 0;
3442 }
3443
3444 static __be32
3445 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3446 struct nfsd4_sequence *seq)
3447 {
3448 __be32 *p;
3449
3450 if (nfserr)
3451 return nfserr;
3452
3453 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3454 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3455 WRITE32(seq->seqid);
3456 WRITE32(seq->slotid);
3457 /* Note slotid's are numbered from zero: */
3458 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3459 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3460 WRITE32(seq->status_flags);
3461
3462 ADJUST_ARGS();
3463 resp->cstate.datap = p; /* DRC cache data pointer */
3464 return 0;
3465 }
3466
3467 static __be32
3468 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3469 struct nfsd4_test_stateid *test_stateid)
3470 {
3471 struct nfsd4_test_stateid_id *stateid, *next;
3472 __be32 *p;
3473
3474 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
3475 *p++ = htonl(test_stateid->ts_num_ids);
3476
3477 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3478 *p++ = stateid->ts_id_status;
3479 }
3480
3481 ADJUST_ARGS();
3482 return nfserr;
3483 }
3484
3485 static __be32
3486 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3487 {
3488 return nfserr;
3489 }
3490
3491 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3492
3493 /*
3494 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3495 * since we don't need to filter out obsolete ops as this is
3496 * done in the decoding phase.
3497 */
3498 static nfsd4_enc nfsd4_enc_ops[] = {
3499 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3500 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3501 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3502 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3503 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3504 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3505 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3506 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3507 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3508 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3509 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3510 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3511 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3512 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3513 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3514 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3515 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3516 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3517 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3518 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3519 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3520 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3521 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3522 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3523 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3524 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3525 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3526 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3527 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3528 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3529 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3530 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3531 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3532 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3533 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3534 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3535 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3536
3537 /* NFSv4.1 operations */
3538 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3539 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3540 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3541 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3542 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3543 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3544 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3545 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3546 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3547 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3548 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3549 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3550 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3551 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3552 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3553 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3554 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3555 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3556 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3557 };
3558
3559 /*
3560 * Calculate the total amount of memory that the compound response has taken
3561 * after encoding the current operation with pad.
3562 *
3563 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3564 * which was specified at nfsd4_operation, else pad is zero.
3565 *
3566 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3567 *
3568 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3569 * will be at least a page and will therefore hold the xdr_buf head.
3570 */
3571 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3572 {
3573 struct xdr_buf *xb = &resp->rqstp->rq_res;
3574 struct nfsd4_session *session = NULL;
3575 struct nfsd4_slot *slot = resp->cstate.slot;
3576 u32 length, tlen = 0;
3577
3578 if (!nfsd4_has_session(&resp->cstate))
3579 return 0;
3580
3581 session = resp->cstate.session;
3582 if (session == NULL)
3583 return 0;
3584
3585 if (xb->page_len == 0) {
3586 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3587 } else {
3588 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3589 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3590
3591 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3592 }
3593 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3594 length, xb->page_len, tlen, pad);
3595
3596 if (length > session->se_fchannel.maxresp_sz)
3597 return nfserr_rep_too_big;
3598
3599 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3600 length > session->se_fchannel.maxresp_cached)
3601 return nfserr_rep_too_big_to_cache;
3602
3603 return 0;
3604 }
3605
3606 void
3607 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3608 {
3609 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3610 __be32 *statp;
3611 __be32 *p;
3612
3613 RESERVE_SPACE(8);
3614 WRITE32(op->opnum);
3615 statp = p++; /* to be backfilled at the end */
3616 ADJUST_ARGS();
3617
3618 if (op->opnum == OP_ILLEGAL)
3619 goto status;
3620 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3621 !nfsd4_enc_ops[op->opnum]);
3622 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3623 /* nfsd4_check_drc_limit guarantees enough room for error status */
3624 if (!op->status)
3625 op->status = nfsd4_check_resp_size(resp, 0);
3626 if (so) {
3627 so->so_replay.rp_status = op->status;
3628 so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
3629 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3630 }
3631 status:
3632 /*
3633 * Note: We write the status directly, instead of using WRITE32(),
3634 * since it is already in network byte order.
3635 */
3636 *statp = op->status;
3637 }
3638
3639 /*
3640 * Encode the reply stored in the stateowner reply cache
3641 *
3642 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3643 * previously sent already encoded operation.
3644 *
3645 * called with nfs4_lock_state() held
3646 */
3647 void
3648 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3649 {
3650 __be32 *p;
3651 struct nfs4_replay *rp = op->replay;
3652
3653 BUG_ON(!rp);
3654
3655 RESERVE_SPACE(8);
3656 WRITE32(op->opnum);
3657 *p++ = rp->rp_status; /* already xdr'ed */
3658 ADJUST_ARGS();
3659
3660 RESERVE_SPACE(rp->rp_buflen);
3661 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3662 ADJUST_ARGS();
3663 }
3664
3665 int
3666 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3667 {
3668 return xdr_ressize_check(rqstp, p);
3669 }
3670
3671 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3672 {
3673 struct svc_rqst *rqstp = rq;
3674 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3675
3676 if (args->ops != args->iops) {
3677 kfree(args->ops);
3678 args->ops = args->iops;
3679 }
3680 kfree(args->tmpp);
3681 args->tmpp = NULL;
3682 while (args->to_free) {
3683 struct tmpbuf *tb = args->to_free;
3684 args->to_free = tb->next;
3685 tb->release(tb->buf);
3686 kfree(tb);
3687 }
3688 return 1;
3689 }
3690
3691 int
3692 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3693 {
3694 args->p = p;
3695 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3696 args->pagelist = rqstp->rq_arg.pages;
3697 args->pagelen = rqstp->rq_arg.page_len;
3698 args->tmpp = NULL;
3699 args->to_free = NULL;
3700 args->ops = args->iops;
3701 args->rqstp = rqstp;
3702
3703 return !nfsd4_decode_compound(args);
3704 }
3705
3706 int
3707 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3708 {
3709 /*
3710 * All that remains is to write the tag and operation count...
3711 */
3712 struct nfsd4_compound_state *cs = &resp->cstate;
3713 struct kvec *iov;
3714 p = resp->tagp;
3715 *p++ = htonl(resp->taglen);
3716 memcpy(p, resp->tag, resp->taglen);
3717 p += XDR_QUADLEN(resp->taglen);
3718 *p++ = htonl(resp->opcnt);
3719
3720 if (rqstp->rq_res.page_len)
3721 iov = &rqstp->rq_res.tail[0];
3722 else
3723 iov = &rqstp->rq_res.head[0];
3724 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3725 BUG_ON(iov->iov_len > PAGE_SIZE);
3726 if (nfsd4_has_session(cs)) {
3727 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3728 struct nfs4_client *clp = cs->session->se_client;
3729 if (cs->status != nfserr_replay_cache) {
3730 nfsd4_store_cache_entry(resp);
3731 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3732 }
3733 /* Renew the clientid on success and on replay */
3734 spin_lock(&nn->client_lock);
3735 nfsd4_put_session(cs->session);
3736 spin_unlock(&nn->client_lock);
3737 put_client_renew(clp);
3738 }
3739 return 1;
3740 }
3741
3742 /*
3743 * Local variables:
3744 * c-basic-offset: 8
3745 * End:
3746 */
Linux kernel - Deliverables
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