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-rw-r--r--fs/nfsd/nfs4xdr.c2536
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diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
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index 000000000000..36a058a112d5
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+++ b/fs/nfsd/nfs4xdr.c
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1/*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Server-side XDR for NFSv4
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
43 */
44
45#include <linux/param.h>
46#include <linux/smp.h>
47#include <linux/smp_lock.h>
48#include <linux/fs.h>
49#include <linux/namei.h>
50#include <linux/vfs.h>
51#include <linux/sunrpc/xdr.h>
52#include <linux/sunrpc/svc.h>
53#include <linux/sunrpc/clnt.h>
54#include <linux/nfsd/nfsd.h>
55#include <linux/nfsd/state.h>
56#include <linux/nfsd/xdr4.h>
57#include <linux/nfsd_idmap.h>
58#include <linux/nfs4.h>
59#include <linux/nfs4_acl.h>
60
61#define NFSDDBG_FACILITY NFSDDBG_XDR
62
63static int
64check_filename(char *str, int len, int err)
65{
66 int i;
67
68 if (len == 0)
69 return nfserr_inval;
70 if (isdotent(str, len))
71 return err;
72 for (i = 0; i < len; i++)
73 if (str[i] == '/')
74 return err;
75 return 0;
76}
77
78/*
79 * START OF "GENERIC" DECODE ROUTINES.
80 * These may look a little ugly since they are imported from a "generic"
81 * set of XDR encode/decode routines which are intended to be shared by
82 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
83 *
84 * If the pain of reading these is too great, it should be a straightforward
85 * task to translate them into Linux-specific versions which are more
86 * consistent with the style used in NFSv2/v3...
87 */
88#define DECODE_HEAD \
89 u32 *p; \
90 int status
91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
96 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
97 status = nfserr_bad_xdr; \
98 goto out
99
100#define READ32(x) (x) = ntohl(*p++)
101#define READ64(x) do { \
102 (x) = (u64)ntohl(*p++) << 32; \
103 (x) |= ntohl(*p++); \
104} while (0)
105#define READTIME(x) do { \
106 p++; \
107 (x) = ntohl(*p++); \
108 p++; \
109} while (0)
110#define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114#define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
118 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
119 goto xdr_error; \
120 } \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123#define COPYMEM(x,nbytes) do { \
124 memcpy((x), p, nbytes); \
125 p += XDR_QUADLEN(nbytes); \
126} while (0)
127
128/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
129#define READ_BUF(nbytes) do { \
130 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
131 p = argp->p; \
132 argp->p += XDR_QUADLEN(nbytes); \
133 } else if (!(p = read_buf(argp, nbytes))) { \
134 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
135 goto xdr_error; \
136 } \
137} while (0)
138
139u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
140{
141 /* We want more bytes than seem to be available.
142 * Maybe we need a new page, maybe we have just run out
143 */
144 int avail = (char*)argp->end - (char*)argp->p;
145 u32 *p;
146 if (avail + argp->pagelen < nbytes)
147 return NULL;
148 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
149 return NULL;
150 /* ok, we can do it with the current plus the next page */
151 if (nbytes <= sizeof(argp->tmp))
152 p = argp->tmp;
153 else {
154 if (argp->tmpp)
155 kfree(argp->tmpp);
156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
157 if (!p)
158 return NULL;
159
160 }
161 memcpy(p, argp->p, avail);
162 /* step to next page */
163 argp->p = page_address(argp->pagelist[0]);
164 argp->pagelist++;
165 if (argp->pagelen < PAGE_SIZE) {
166 argp->end = p + (argp->pagelen>>2);
167 argp->pagelen = 0;
168 } else {
169 argp->end = p + (PAGE_SIZE>>2);
170 argp->pagelen -= PAGE_SIZE;
171 }
172 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
173 argp->p += XDR_QUADLEN(nbytes - avail);
174 return p;
175}
176
177static int
178defer_free(struct nfsd4_compoundargs *argp,
179 void (*release)(const void *), void *p)
180{
181 struct tmpbuf *tb;
182
183 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
184 if (!tb)
185 return -ENOMEM;
186 tb->buf = p;
187 tb->release = release;
188 tb->next = argp->to_free;
189 argp->to_free = tb;
190 return 0;
191}
192
193char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
194{
195 void *new = NULL;
196 if (p == argp->tmp) {
197 new = kmalloc(nbytes, GFP_KERNEL);
198 if (!new) return NULL;
199 p = new;
200 memcpy(p, argp->tmp, nbytes);
201 } else {
202 if (p != argp->tmpp)
203 BUG();
204 argp->tmpp = NULL;
205 }
206 if (defer_free(argp, kfree, p)) {
207 kfree(new);
208 return NULL;
209 } else
210 return (char *)p;
211}
212
213
214static int
215nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
216{
217 u32 bmlen;
218 DECODE_HEAD;
219
220 bmval[0] = 0;
221 bmval[1] = 0;
222
223 READ_BUF(4);
224 READ32(bmlen);
225 if (bmlen > 1000)
226 goto xdr_error;
227
228 READ_BUF(bmlen << 2);
229 if (bmlen > 0)
230 READ32(bmval[0]);
231 if (bmlen > 1)
232 READ32(bmval[1]);
233
234 DECODE_TAIL;
235}
236
237static int
238nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
239 struct nfs4_acl **acl)
240{
241 int expected_len, len = 0;
242 u32 dummy32;
243 char *buf;
244
245 DECODE_HEAD;
246 iattr->ia_valid = 0;
247 if ((status = nfsd4_decode_bitmap(argp, bmval)))
248 return status;
249
250 /*
251 * According to spec, unsupported attributes return ERR_NOTSUPP;
252 * read-only attributes return ERR_INVAL.
253 */
254 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
255 return nfserr_attrnotsupp;
256 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
257 return nfserr_inval;
258
259 READ_BUF(4);
260 READ32(expected_len);
261
262 if (bmval[0] & FATTR4_WORD0_SIZE) {
263 READ_BUF(8);
264 len += 8;
265 READ64(iattr->ia_size);
266 iattr->ia_valid |= ATTR_SIZE;
267 }
268 if (bmval[0] & FATTR4_WORD0_ACL) {
269 int nace, i;
270 struct nfs4_ace ace;
271
272 READ_BUF(4); len += 4;
273 READ32(nace);
274
275 *acl = nfs4_acl_new();
276 if (*acl == NULL) {
277 status = -ENOMEM;
278 goto out_nfserr;
279 }
280 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
281
282 for (i = 0; i < nace; i++) {
283 READ_BUF(16); len += 16;
284 READ32(ace.type);
285 READ32(ace.flag);
286 READ32(ace.access_mask);
287 READ32(dummy32);
288 READ_BUF(dummy32);
289 len += XDR_QUADLEN(dummy32) << 2;
290 READMEM(buf, dummy32);
291 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
292 status = 0;
293 if (ace.whotype != NFS4_ACL_WHO_NAMED)
294 ace.who = 0;
295 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
296 status = nfsd_map_name_to_gid(argp->rqstp,
297 buf, dummy32, &ace.who);
298 else
299 status = nfsd_map_name_to_uid(argp->rqstp,
300 buf, dummy32, &ace.who);
301 if (status)
302 goto out_nfserr;
303 if (nfs4_acl_add_ace(*acl, ace.type, ace.flag,
304 ace.access_mask, ace.whotype, ace.who) != 0) {
305 status = -ENOMEM;
306 goto out_nfserr;
307 }
308 }
309 } else
310 *acl = NULL;
311 if (bmval[1] & FATTR4_WORD1_MODE) {
312 READ_BUF(4);
313 len += 4;
314 READ32(iattr->ia_mode);
315 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
316 iattr->ia_valid |= ATTR_MODE;
317 }
318 if (bmval[1] & FATTR4_WORD1_OWNER) {
319 READ_BUF(4);
320 len += 4;
321 READ32(dummy32);
322 READ_BUF(dummy32);
323 len += (XDR_QUADLEN(dummy32) << 2);
324 READMEM(buf, dummy32);
325 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
326 goto out_nfserr;
327 iattr->ia_valid |= ATTR_UID;
328 }
329 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
330 READ_BUF(4);
331 len += 4;
332 READ32(dummy32);
333 READ_BUF(dummy32);
334 len += (XDR_QUADLEN(dummy32) << 2);
335 READMEM(buf, dummy32);
336 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
337 goto out_nfserr;
338 iattr->ia_valid |= ATTR_GID;
339 }
340 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
341 READ_BUF(4);
342 len += 4;
343 READ32(dummy32);
344 switch (dummy32) {
345 case NFS4_SET_TO_CLIENT_TIME:
346 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
347 all 32 bits of 'nseconds'. */
348 READ_BUF(12);
349 len += 12;
350 READ32(dummy32);
351 if (dummy32)
352 return nfserr_inval;
353 READ32(iattr->ia_atime.tv_sec);
354 READ32(iattr->ia_atime.tv_nsec);
355 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
356 return nfserr_inval;
357 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
358 break;
359 case NFS4_SET_TO_SERVER_TIME:
360 iattr->ia_valid |= ATTR_ATIME;
361 break;
362 default:
363 goto xdr_error;
364 }
365 }
366 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
367 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
368 all 32 bits of 'nseconds'. */
369 READ_BUF(12);
370 len += 12;
371 READ32(dummy32);
372 if (dummy32)
373 return nfserr_inval;
374 READ32(iattr->ia_ctime.tv_sec);
375 READ32(iattr->ia_ctime.tv_nsec);
376 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
377 return nfserr_inval;
378 iattr->ia_valid |= ATTR_CTIME;
379 }
380 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
381 READ_BUF(4);
382 len += 4;
383 READ32(dummy32);
384 switch (dummy32) {
385 case NFS4_SET_TO_CLIENT_TIME:
386 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
387 all 32 bits of 'nseconds'. */
388 READ_BUF(12);
389 len += 12;
390 READ32(dummy32);
391 if (dummy32)
392 return nfserr_inval;
393 READ32(iattr->ia_mtime.tv_sec);
394 READ32(iattr->ia_mtime.tv_nsec);
395 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
396 return nfserr_inval;
397 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
398 break;
399 case NFS4_SET_TO_SERVER_TIME:
400 iattr->ia_valid |= ATTR_MTIME;
401 break;
402 default:
403 goto xdr_error;
404 }
405 }
406 if (len != expected_len)
407 goto xdr_error;
408
409 DECODE_TAIL;
410
411out_nfserr:
412 status = nfserrno(status);
413 goto out;
414}
415
416static int
417nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
418{
419 DECODE_HEAD;
420
421 READ_BUF(4);
422 READ32(access->ac_req_access);
423
424 DECODE_TAIL;
425}
426
427static int
428nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
429{
430 DECODE_HEAD;
431
432 close->cl_stateowner = NULL;
433 READ_BUF(4 + sizeof(stateid_t));
434 READ32(close->cl_seqid);
435 READ32(close->cl_stateid.si_generation);
436 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
437
438 DECODE_TAIL;
439}
440
441
442static int
443nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
444{
445 DECODE_HEAD;
446
447 READ_BUF(12);
448 READ64(commit->co_offset);
449 READ32(commit->co_count);
450
451 DECODE_TAIL;
452}
453
454static int
455nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(create->cr_type);
461 switch (create->cr_type) {
462 case NF4LNK:
463 READ_BUF(4);
464 READ32(create->cr_linklen);
465 READ_BUF(create->cr_linklen);
466 SAVEMEM(create->cr_linkname, create->cr_linklen);
467 break;
468 case NF4BLK:
469 case NF4CHR:
470 READ_BUF(8);
471 READ32(create->cr_specdata1);
472 READ32(create->cr_specdata2);
473 break;
474 case NF4SOCK:
475 case NF4FIFO:
476 case NF4DIR:
477 default:
478 break;
479 }
480
481 READ_BUF(4);
482 READ32(create->cr_namelen);
483 READ_BUF(create->cr_namelen);
484 SAVEMEM(create->cr_name, create->cr_namelen);
485 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
486 return status;
487
488 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
489 goto out;
490
491 DECODE_TAIL;
492}
493
494static inline int
495nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
496{
497 DECODE_HEAD;
498
499 READ_BUF(sizeof(stateid_t));
500 READ32(dr->dr_stateid.si_generation);
501 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
502
503 DECODE_TAIL;
504}
505
506static inline int
507nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
508{
509 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
510}
511
512static int
513nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
514{
515 DECODE_HEAD;
516
517 READ_BUF(4);
518 READ32(link->li_namelen);
519 READ_BUF(link->li_namelen);
520 SAVEMEM(link->li_name, link->li_namelen);
521 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
522 return status;
523
524 DECODE_TAIL;
525}
526
527static int
528nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
529{
530 DECODE_HEAD;
531
532 lock->lk_stateowner = NULL;
533 /*
534 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
535 */
536 READ_BUF(28);
537 READ32(lock->lk_type);
538 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
539 goto xdr_error;
540 READ32(lock->lk_reclaim);
541 READ64(lock->lk_offset);
542 READ64(lock->lk_length);
543 READ32(lock->lk_is_new);
544
545 if (lock->lk_is_new) {
546 READ_BUF(36);
547 READ32(lock->lk_new_open_seqid);
548 READ32(lock->lk_new_open_stateid.si_generation);
549
550 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
551 READ32(lock->lk_new_lock_seqid);
552 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
553 READ32(lock->lk_new_owner.len);
554 READ_BUF(lock->lk_new_owner.len);
555 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
556 } else {
557 READ_BUF(20);
558 READ32(lock->lk_old_lock_stateid.si_generation);
559 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
560 READ32(lock->lk_old_lock_seqid);
561 }
562
563 DECODE_TAIL;
564}
565
566static int
567nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
568{
569 DECODE_HEAD;
570
571 READ_BUF(32);
572 READ32(lockt->lt_type);
573 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
574 goto xdr_error;
575 READ64(lockt->lt_offset);
576 READ64(lockt->lt_length);
577 COPYMEM(&lockt->lt_clientid, 8);
578 READ32(lockt->lt_owner.len);
579 READ_BUF(lockt->lt_owner.len);
580 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
581
582 DECODE_TAIL;
583}
584
585static int
586nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
587{
588 DECODE_HEAD;
589
590 locku->lu_stateowner = NULL;
591 READ_BUF(24 + sizeof(stateid_t));
592 READ32(locku->lu_type);
593 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
594 goto xdr_error;
595 READ32(locku->lu_seqid);
596 READ32(locku->lu_stateid.si_generation);
597 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
598 READ64(locku->lu_offset);
599 READ64(locku->lu_length);
600
601 DECODE_TAIL;
602}
603
604static int
605nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
606{
607 DECODE_HEAD;
608
609 READ_BUF(4);
610 READ32(lookup->lo_len);
611 READ_BUF(lookup->lo_len);
612 SAVEMEM(lookup->lo_name, lookup->lo_len);
613 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
614 return status;
615
616 DECODE_TAIL;
617}
618
619static int
620nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
621{
622 DECODE_HEAD;
623
624 memset(open->op_bmval, 0, sizeof(open->op_bmval));
625 open->op_iattr.ia_valid = 0;
626 open->op_stateowner = NULL;
627
628 /* seqid, share_access, share_deny, clientid, ownerlen */
629 READ_BUF(16 + sizeof(clientid_t));
630 READ32(open->op_seqid);
631 READ32(open->op_share_access);
632 READ32(open->op_share_deny);
633 COPYMEM(&open->op_clientid, sizeof(clientid_t));
634 READ32(open->op_owner.len);
635
636 /* owner, open_flag */
637 READ_BUF(open->op_owner.len + 4);
638 SAVEMEM(open->op_owner.data, open->op_owner.len);
639 READ32(open->op_create);
640 switch (open->op_create) {
641 case NFS4_OPEN_NOCREATE:
642 break;
643 case NFS4_OPEN_CREATE:
644 READ_BUF(4);
645 READ32(open->op_createmode);
646 switch (open->op_createmode) {
647 case NFS4_CREATE_UNCHECKED:
648 case NFS4_CREATE_GUARDED:
649 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
650 goto out;
651 break;
652 case NFS4_CREATE_EXCLUSIVE:
653 READ_BUF(8);
654 COPYMEM(open->op_verf.data, 8);
655 break;
656 default:
657 goto xdr_error;
658 }
659 break;
660 default:
661 goto xdr_error;
662 }
663
664 /* open_claim */
665 READ_BUF(4);
666 READ32(open->op_claim_type);
667 switch (open->op_claim_type) {
668 case NFS4_OPEN_CLAIM_NULL:
669 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
670 READ_BUF(4);
671 READ32(open->op_fname.len);
672 READ_BUF(open->op_fname.len);
673 SAVEMEM(open->op_fname.data, open->op_fname.len);
674 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
675 return status;
676 break;
677 case NFS4_OPEN_CLAIM_PREVIOUS:
678 READ_BUF(4);
679 READ32(open->op_delegate_type);
680 break;
681 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
682 READ_BUF(sizeof(stateid_t) + 4);
683 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
684 READ32(open->op_fname.len);
685 READ_BUF(open->op_fname.len);
686 SAVEMEM(open->op_fname.data, open->op_fname.len);
687 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
688 return status;
689 break;
690 default:
691 goto xdr_error;
692 }
693
694 DECODE_TAIL;
695}
696
697static int
698nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
699{
700 DECODE_HEAD;
701
702 open_conf->oc_stateowner = NULL;
703 READ_BUF(4 + sizeof(stateid_t));
704 READ32(open_conf->oc_req_stateid.si_generation);
705 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
706 READ32(open_conf->oc_seqid);
707
708 DECODE_TAIL;
709}
710
711static int
712nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
713{
714 DECODE_HEAD;
715
716 open_down->od_stateowner = NULL;
717 READ_BUF(12 + sizeof(stateid_t));
718 READ32(open_down->od_stateid.si_generation);
719 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
720 READ32(open_down->od_seqid);
721 READ32(open_down->od_share_access);
722 READ32(open_down->od_share_deny);
723
724 DECODE_TAIL;
725}
726
727static int
728nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
729{
730 DECODE_HEAD;
731
732 READ_BUF(4);
733 READ32(putfh->pf_fhlen);
734 if (putfh->pf_fhlen > NFS4_FHSIZE)
735 goto xdr_error;
736 READ_BUF(putfh->pf_fhlen);
737 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
738
739 DECODE_TAIL;
740}
741
742static int
743nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
744{
745 DECODE_HEAD;
746
747 READ_BUF(sizeof(stateid_t) + 12);
748 READ32(read->rd_stateid.si_generation);
749 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
750 READ64(read->rd_offset);
751 READ32(read->rd_length);
752
753 DECODE_TAIL;
754}
755
756static int
757nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
758{
759 DECODE_HEAD;
760
761 READ_BUF(24);
762 READ64(readdir->rd_cookie);
763 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
764 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
765 READ32(readdir->rd_maxcount);
766 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
767 goto out;
768
769 DECODE_TAIL;
770}
771
772static int
773nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
774{
775 DECODE_HEAD;
776
777 READ_BUF(4);
778 READ32(remove->rm_namelen);
779 READ_BUF(remove->rm_namelen);
780 SAVEMEM(remove->rm_name, remove->rm_namelen);
781 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
782 return status;
783
784 DECODE_TAIL;
785}
786
787static int
788nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
789{
790 DECODE_HEAD;
791
792 READ_BUF(4);
793 READ32(rename->rn_snamelen);
794 READ_BUF(rename->rn_snamelen + 4);
795 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
796 READ32(rename->rn_tnamelen);
797 READ_BUF(rename->rn_tnamelen);
798 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
799 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
800 return status;
801 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
802 return status;
803
804 DECODE_TAIL;
805}
806
807static int
808nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
809{
810 DECODE_HEAD;
811
812 READ_BUF(sizeof(clientid_t));
813 COPYMEM(clientid, sizeof(clientid_t));
814
815 DECODE_TAIL;
816}
817
818static int
819nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
820{
821 DECODE_HEAD;
822
823 READ_BUF(sizeof(stateid_t));
824 READ32(setattr->sa_stateid.si_generation);
825 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
826 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
827 goto out;
828
829 DECODE_TAIL;
830}
831
832static int
833nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
834{
835 DECODE_HEAD;
836
837 READ_BUF(12);
838 COPYMEM(setclientid->se_verf.data, 8);
839 READ32(setclientid->se_namelen);
840
841 READ_BUF(setclientid->se_namelen + 8);
842 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
843 READ32(setclientid->se_callback_prog);
844 READ32(setclientid->se_callback_netid_len);
845
846 READ_BUF(setclientid->se_callback_netid_len + 4);
847 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
848 READ32(setclientid->se_callback_addr_len);
849
850 READ_BUF(setclientid->se_callback_addr_len + 4);
851 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
852 READ32(setclientid->se_callback_ident);
853
854 DECODE_TAIL;
855}
856
857static int
858nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
859{
860 DECODE_HEAD;
861
862 READ_BUF(8 + sizeof(nfs4_verifier));
863 COPYMEM(&scd_c->sc_clientid, 8);
864 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
865
866 DECODE_TAIL;
867}
868
869/* Also used for NVERIFY */
870static int
871nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
872{
873#if 0
874 struct nfsd4_compoundargs save = {
875 .p = argp->p,
876 .end = argp->end,
877 .rqstp = argp->rqstp,
878 };
879 u32 ve_bmval[2];
880 struct iattr ve_iattr; /* request */
881 struct nfs4_acl *ve_acl; /* request */
882#endif
883 DECODE_HEAD;
884
885 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
886 goto out;
887
888 /* For convenience's sake, we compare raw xdr'd attributes in
889 * nfsd4_proc_verify; however we still decode here just to return
890 * correct error in case of bad xdr. */
891#if 0
892 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
893 if (status == nfserr_inval) {
894 status = nfserrno(status);
895 goto out;
896 }
897#endif
898 READ_BUF(4);
899 READ32(verify->ve_attrlen);
900 READ_BUF(verify->ve_attrlen);
901 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
902
903 DECODE_TAIL;
904}
905
906static int
907nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
908{
909 int avail;
910 int v;
911 int len;
912 DECODE_HEAD;
913
914 READ_BUF(sizeof(stateid_opaque_t) + 20);
915 READ32(write->wr_stateid.si_generation);
916 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
917 READ64(write->wr_offset);
918 READ32(write->wr_stable_how);
919 if (write->wr_stable_how > 2)
920 goto xdr_error;
921 READ32(write->wr_buflen);
922
923 /* Sorry .. no magic macros for this.. *
924 * READ_BUF(write->wr_buflen);
925 * SAVEMEM(write->wr_buf, write->wr_buflen);
926 */
927 avail = (char*)argp->end - (char*)argp->p;
928 if (avail + argp->pagelen < write->wr_buflen) {
929 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
930 goto xdr_error;
931 }
932 write->wr_vec[0].iov_base = p;
933 write->wr_vec[0].iov_len = avail;
934 v = 0;
935 len = write->wr_buflen;
936 while (len > write->wr_vec[v].iov_len) {
937 len -= write->wr_vec[v].iov_len;
938 v++;
939 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
940 argp->pagelist++;
941 if (argp->pagelen >= PAGE_SIZE) {
942 write->wr_vec[v].iov_len = PAGE_SIZE;
943 argp->pagelen -= PAGE_SIZE;
944 } else {
945 write->wr_vec[v].iov_len = argp->pagelen;
946 argp->pagelen -= len;
947 }
948 }
949 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
950 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
951 write->wr_vec[v].iov_len = len;
952 write->wr_vlen = v+1;
953
954 DECODE_TAIL;
955}
956
957static int
958nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
959{
960 DECODE_HEAD;
961
962 READ_BUF(12);
963 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
964 READ32(rlockowner->rl_owner.len);
965 READ_BUF(rlockowner->rl_owner.len);
966 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
967
968 DECODE_TAIL;
969}
970
971static int
972nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
973{
974 DECODE_HEAD;
975 struct nfsd4_op *op;
976 int i;
977
978 /*
979 * XXX: According to spec, we should check the tag
980 * for UTF-8 compliance. I'm postponing this for
981 * now because it seems that some clients do use
982 * binary tags.
983 */
984 READ_BUF(4);
985 READ32(argp->taglen);
986 READ_BUF(argp->taglen + 8);
987 SAVEMEM(argp->tag, argp->taglen);
988 READ32(argp->minorversion);
989 READ32(argp->opcnt);
990
991 if (argp->taglen > NFSD4_MAX_TAGLEN)
992 goto xdr_error;
993 if (argp->opcnt > 100)
994 goto xdr_error;
995
996 if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
997 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
998 if (!argp->ops) {
999 argp->ops = argp->iops;
1000 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1001 goto xdr_error;
1002 }
1003 }
1004
1005 for (i = 0; i < argp->opcnt; i++) {
1006 op = &argp->ops[i];
1007 op->replay = NULL;
1008
1009 /*
1010 * We can't use READ_BUF() here because we need to handle
1011 * a missing opcode as an OP_WRITE + 1. So we need to check
1012 * to see if we're truly at the end of our buffer or if there
1013 * is another page we need to flip to.
1014 */
1015
1016 if (argp->p == argp->end) {
1017 if (argp->pagelen < 4) {
1018 /* There isn't an opcode still on the wire */
1019 op->opnum = OP_WRITE + 1;
1020 op->status = nfserr_bad_xdr;
1021 argp->opcnt = i+1;
1022 break;
1023 }
1024
1025 /*
1026 * False alarm. We just hit a page boundary, but there
1027 * is still data available. Move pointer across page
1028 * boundary. *snip from READ_BUF*
1029 */
1030 argp->p = page_address(argp->pagelist[0]);
1031 argp->pagelist++;
1032 if (argp->pagelen < PAGE_SIZE) {
1033 argp->end = p + (argp->pagelen>>2);
1034 argp->pagelen = 0;
1035 } else {
1036 argp->end = p + (PAGE_SIZE>>2);
1037 argp->pagelen -= PAGE_SIZE;
1038 }
1039 }
1040 op->opnum = ntohl(*argp->p++);
1041
1042 switch (op->opnum) {
1043 case 2: /* Reserved operation */
1044 op->opnum = OP_ILLEGAL;
1045 if (argp->minorversion == 0)
1046 op->status = nfserr_op_illegal;
1047 else
1048 op->status = nfserr_minor_vers_mismatch;
1049 break;
1050 case OP_ACCESS:
1051 op->status = nfsd4_decode_access(argp, &op->u.access);
1052 break;
1053 case OP_CLOSE:
1054 op->status = nfsd4_decode_close(argp, &op->u.close);
1055 break;
1056 case OP_COMMIT:
1057 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1058 break;
1059 case OP_CREATE:
1060 op->status = nfsd4_decode_create(argp, &op->u.create);
1061 break;
1062 case OP_DELEGRETURN:
1063 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1064 break;
1065 case OP_GETATTR:
1066 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1067 break;
1068 case OP_GETFH:
1069 op->status = nfs_ok;
1070 break;
1071 case OP_LINK:
1072 op->status = nfsd4_decode_link(argp, &op->u.link);
1073 break;
1074 case OP_LOCK:
1075 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1076 break;
1077 case OP_LOCKT:
1078 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1079 break;
1080 case OP_LOCKU:
1081 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1082 break;
1083 case OP_LOOKUP:
1084 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1085 break;
1086 case OP_LOOKUPP:
1087 op->status = nfs_ok;
1088 break;
1089 case OP_NVERIFY:
1090 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1091 break;
1092 case OP_OPEN:
1093 op->status = nfsd4_decode_open(argp, &op->u.open);
1094 break;
1095 case OP_OPEN_CONFIRM:
1096 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1097 break;
1098 case OP_OPEN_DOWNGRADE:
1099 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1100 break;
1101 case OP_PUTFH:
1102 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1103 break;
1104 case OP_PUTROOTFH:
1105 op->status = nfs_ok;
1106 break;
1107 case OP_READ:
1108 op->status = nfsd4_decode_read(argp, &op->u.read);
1109 break;
1110 case OP_READDIR:
1111 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1112 break;
1113 case OP_READLINK:
1114 op->status = nfs_ok;
1115 break;
1116 case OP_REMOVE:
1117 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1118 break;
1119 case OP_RENAME:
1120 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1121 break;
1122 case OP_RESTOREFH:
1123 op->status = nfs_ok;
1124 break;
1125 case OP_RENEW:
1126 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1127 break;
1128 case OP_SAVEFH:
1129 op->status = nfs_ok;
1130 break;
1131 case OP_SETATTR:
1132 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1133 break;
1134 case OP_SETCLIENTID:
1135 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1136 break;
1137 case OP_SETCLIENTID_CONFIRM:
1138 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1139 break;
1140 case OP_VERIFY:
1141 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1142 break;
1143 case OP_WRITE:
1144 op->status = nfsd4_decode_write(argp, &op->u.write);
1145 break;
1146 case OP_RELEASE_LOCKOWNER:
1147 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1148 break;
1149 default:
1150 op->opnum = OP_ILLEGAL;
1151 op->status = nfserr_op_illegal;
1152 break;
1153 }
1154
1155 if (op->status) {
1156 argp->opcnt = i+1;
1157 break;
1158 }
1159 }
1160
1161 DECODE_TAIL;
1162}
1163/*
1164 * END OF "GENERIC" DECODE ROUTINES.
1165 */
1166
1167/*
1168 * START OF "GENERIC" ENCODE ROUTINES.
1169 * These may look a little ugly since they are imported from a "generic"
1170 * set of XDR encode/decode routines which are intended to be shared by
1171 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1172 *
1173 * If the pain of reading these is too great, it should be a straightforward
1174 * task to translate them into Linux-specific versions which are more
1175 * consistent with the style used in NFSv2/v3...
1176 */
1177#define ENCODE_HEAD u32 *p
1178
1179#define WRITE32(n) *p++ = htonl(n)
1180#define WRITE64(n) do { \
1181 *p++ = htonl((u32)((n) >> 32)); \
1182 *p++ = htonl((u32)(n)); \
1183} while (0)
1184#define WRITEMEM(ptr,nbytes) do { \
1185 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1186 memcpy(p, ptr, nbytes); \
1187 p += XDR_QUADLEN(nbytes); \
1188} while (0)
1189#define WRITECINFO(c) do { \
1190 *p++ = htonl(c.atomic); \
1191 *p++ = htonl(c.before_ctime_sec); \
1192 *p++ = htonl(c.before_ctime_nsec); \
1193 *p++ = htonl(c.after_ctime_sec); \
1194 *p++ = htonl(c.after_ctime_nsec); \
1195} while (0)
1196
1197#define RESERVE_SPACE(nbytes) do { \
1198 p = resp->p; \
1199 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1200} while (0)
1201#define ADJUST_ARGS() resp->p = p
1202
1203/*
1204 * Header routine to setup seqid operation replay cache
1205 */
1206#define ENCODE_SEQID_OP_HEAD \
1207 u32 *p; \
1208 u32 *save; \
1209 \
1210 save = resp->p;
1211
1212/*
1213 * Routine for encoding the result of a
1214 * "seqid-mutating" NFSv4 operation. This is
1215 * where seqids are incremented, and the
1216 * replay cache is filled.
1217 */
1218
1219#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1220 if (seqid_mutating_err(nfserr) && stateowner) { \
1221 if (stateowner->so_confirmed) \
1222 stateowner->so_seqid++; \
1223 stateowner->so_replay.rp_status = nfserr; \
1224 stateowner->so_replay.rp_buflen = \
1225 (((char *)(resp)->p - (char *)save)); \
1226 memcpy(stateowner->so_replay.rp_buf, save, \
1227 stateowner->so_replay.rp_buflen); \
1228 } } while (0);
1229
1230
1231static u32 nfs4_ftypes[16] = {
1232 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1233 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1234 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1235 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1236};
1237
1238static int
1239nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1240 u32 **p, int *buflen)
1241{
1242 int status;
1243
1244 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1245 return nfserr_resource;
1246 if (whotype != NFS4_ACL_WHO_NAMED)
1247 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1248 else if (group)
1249 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1250 else
1251 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1252 if (status < 0)
1253 return nfserrno(status);
1254 *p = xdr_encode_opaque(*p, NULL, status);
1255 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1256 BUG_ON(*buflen < 0);
1257 return 0;
1258}
1259
1260static inline int
1261nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1262{
1263 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1264}
1265
1266static inline int
1267nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1268{
1269 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1270}
1271
1272static inline int
1273nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1274 u32 **p, int *buflen)
1275{
1276 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1277}
1278
1279
1280/*
1281 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1282 * ourselves.
1283 *
1284 * @countp is the buffer size in _words_; upon successful return this becomes
1285 * replaced with the number of words written.
1286 */
1287int
1288nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1289 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1290 struct svc_rqst *rqstp)
1291{
1292 u32 bmval0 = bmval[0];
1293 u32 bmval1 = bmval[1];
1294 struct kstat stat;
1295 struct svc_fh tempfh;
1296 struct kstatfs statfs;
1297 int buflen = *countp << 2;
1298 u32 *attrlenp;
1299 u32 dummy;
1300 u64 dummy64;
1301 u32 *p = buffer;
1302 int status;
1303 int aclsupport = 0;
1304 struct nfs4_acl *acl = NULL;
1305
1306 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1307 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1308 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1309
1310 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1311 if (status)
1312 goto out_nfserr;
1313 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1314 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1315 FATTR4_WORD1_SPACE_TOTAL))) {
1316 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1317 if (status)
1318 goto out_nfserr;
1319 }
1320 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1321 fh_init(&tempfh, NFS4_FHSIZE);
1322 status = fh_compose(&tempfh, exp, dentry, NULL);
1323 if (status)
1324 goto out;
1325 fhp = &tempfh;
1326 }
1327 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1328 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1329 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1330 aclsupport = (status == 0);
1331 if (bmval0 & FATTR4_WORD0_ACL) {
1332 if (status == -EOPNOTSUPP)
1333 bmval0 &= ~FATTR4_WORD0_ACL;
1334 else if (status == -EINVAL) {
1335 status = nfserr_attrnotsupp;
1336 goto out;
1337 } else if (status != 0)
1338 goto out_nfserr;
1339 }
1340 }
1341 if ((buflen -= 16) < 0)
1342 goto out_resource;
1343
1344 WRITE32(2);
1345 WRITE32(bmval0);
1346 WRITE32(bmval1);
1347 attrlenp = p++; /* to be backfilled later */
1348
1349 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1350 if ((buflen -= 12) < 0)
1351 goto out_resource;
1352 WRITE32(2);
1353 WRITE32(aclsupport ?
1354 NFSD_SUPPORTED_ATTRS_WORD0 :
1355 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1356 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1357 }
1358 if (bmval0 & FATTR4_WORD0_TYPE) {
1359 if ((buflen -= 4) < 0)
1360 goto out_resource;
1361 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1362 if (dummy == NF4BAD)
1363 goto out_serverfault;
1364 WRITE32(dummy);
1365 }
1366 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1367 if ((buflen -= 4) < 0)
1368 goto out_resource;
1369 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1370 }
1371 if (bmval0 & FATTR4_WORD0_CHANGE) {
1372 /*
1373 * Note: This _must_ be consistent with the scheme for writing
1374 * change_info, so any changes made here must be reflected there
1375 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1376 * macro above.)
1377 */
1378 if ((buflen -= 8) < 0)
1379 goto out_resource;
1380 WRITE32(stat.ctime.tv_sec);
1381 WRITE32(stat.ctime.tv_nsec);
1382 }
1383 if (bmval0 & FATTR4_WORD0_SIZE) {
1384 if ((buflen -= 8) < 0)
1385 goto out_resource;
1386 WRITE64(stat.size);
1387 }
1388 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1389 if ((buflen -= 4) < 0)
1390 goto out_resource;
1391 WRITE32(1);
1392 }
1393 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1394 if ((buflen -= 4) < 0)
1395 goto out_resource;
1396 WRITE32(1);
1397 }
1398 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1399 if ((buflen -= 4) < 0)
1400 goto out_resource;
1401 WRITE32(0);
1402 }
1403 if (bmval0 & FATTR4_WORD0_FSID) {
1404 if ((buflen -= 16) < 0)
1405 goto out_resource;
1406 if (is_fsid(fhp, rqstp->rq_reffh)) {
1407 WRITE64((u64)exp->ex_fsid);
1408 WRITE64((u64)0);
1409 } else {
1410 WRITE32(0);
1411 WRITE32(MAJOR(stat.dev));
1412 WRITE32(0);
1413 WRITE32(MINOR(stat.dev));
1414 }
1415 }
1416 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1417 if ((buflen -= 4) < 0)
1418 goto out_resource;
1419 WRITE32(0);
1420 }
1421 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1422 if ((buflen -= 4) < 0)
1423 goto out_resource;
1424 WRITE32(NFSD_LEASE_TIME);
1425 }
1426 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1427 if ((buflen -= 4) < 0)
1428 goto out_resource;
1429 WRITE32(0);
1430 }
1431 if (bmval0 & FATTR4_WORD0_ACL) {
1432 struct nfs4_ace *ace;
1433 struct list_head *h;
1434
1435 if (acl == NULL) {
1436 if ((buflen -= 4) < 0)
1437 goto out_resource;
1438
1439 WRITE32(0);
1440 goto out_acl;
1441 }
1442 if ((buflen -= 4) < 0)
1443 goto out_resource;
1444 WRITE32(acl->naces);
1445
1446 list_for_each(h, &acl->ace_head) {
1447 ace = list_entry(h, struct nfs4_ace, l_ace);
1448
1449 if ((buflen -= 4*3) < 0)
1450 goto out_resource;
1451 WRITE32(ace->type);
1452 WRITE32(ace->flag);
1453 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1454 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1455 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1456 &p, &buflen);
1457 if (status == nfserr_resource)
1458 goto out_resource;
1459 if (status)
1460 goto out;
1461 }
1462 }
1463out_acl:
1464 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1465 if ((buflen -= 4) < 0)
1466 goto out_resource;
1467 WRITE32(aclsupport ?
1468 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1469 }
1470 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1471 if ((buflen -= 4) < 0)
1472 goto out_resource;
1473 WRITE32(1);
1474 }
1475 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1476 if ((buflen -= 4) < 0)
1477 goto out_resource;
1478 WRITE32(1);
1479 }
1480 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1481 if ((buflen -= 4) < 0)
1482 goto out_resource;
1483 WRITE32(1);
1484 }
1485 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1486 if ((buflen -= 4) < 0)
1487 goto out_resource;
1488 WRITE32(1);
1489 }
1490 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1491 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1492 if (buflen < 0)
1493 goto out_resource;
1494 WRITE32(fhp->fh_handle.fh_size);
1495 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1496 }
1497 if (bmval0 & FATTR4_WORD0_FILEID) {
1498 if ((buflen -= 8) < 0)
1499 goto out_resource;
1500 WRITE64((u64) stat.ino);
1501 }
1502 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1503 if ((buflen -= 8) < 0)
1504 goto out_resource;
1505 WRITE64((u64) statfs.f_ffree);
1506 }
1507 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1508 if ((buflen -= 8) < 0)
1509 goto out_resource;
1510 WRITE64((u64) statfs.f_ffree);
1511 }
1512 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1513 if ((buflen -= 8) < 0)
1514 goto out_resource;
1515 WRITE64((u64) statfs.f_files);
1516 }
1517 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1518 if ((buflen -= 4) < 0)
1519 goto out_resource;
1520 WRITE32(1);
1521 }
1522 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1523 if ((buflen -= 8) < 0)
1524 goto out_resource;
1525 WRITE64(~(u64)0);
1526 }
1527 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1528 if ((buflen -= 4) < 0)
1529 goto out_resource;
1530 WRITE32(255);
1531 }
1532 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1533 if ((buflen -= 4) < 0)
1534 goto out_resource;
1535 WRITE32(~(u32) 0);
1536 }
1537 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1538 if ((buflen -= 8) < 0)
1539 goto out_resource;
1540 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1541 }
1542 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1543 if ((buflen -= 8) < 0)
1544 goto out_resource;
1545 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1546 }
1547 if (bmval1 & FATTR4_WORD1_MODE) {
1548 if ((buflen -= 4) < 0)
1549 goto out_resource;
1550 WRITE32(stat.mode & S_IALLUGO);
1551 }
1552 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1553 if ((buflen -= 4) < 0)
1554 goto out_resource;
1555 WRITE32(1);
1556 }
1557 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1558 if ((buflen -= 4) < 0)
1559 goto out_resource;
1560 WRITE32(stat.nlink);
1561 }
1562 if (bmval1 & FATTR4_WORD1_OWNER) {
1563 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1564 if (status == nfserr_resource)
1565 goto out_resource;
1566 if (status)
1567 goto out;
1568 }
1569 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1570 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1571 if (status == nfserr_resource)
1572 goto out_resource;
1573 if (status)
1574 goto out;
1575 }
1576 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1577 if ((buflen -= 8) < 0)
1578 goto out_resource;
1579 WRITE32((u32) MAJOR(stat.rdev));
1580 WRITE32((u32) MINOR(stat.rdev));
1581 }
1582 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1583 if ((buflen -= 8) < 0)
1584 goto out_resource;
1585 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1586 WRITE64(dummy64);
1587 }
1588 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1589 if ((buflen -= 8) < 0)
1590 goto out_resource;
1591 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1592 WRITE64(dummy64);
1593 }
1594 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1595 if ((buflen -= 8) < 0)
1596 goto out_resource;
1597 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1598 WRITE64(dummy64);
1599 }
1600 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1601 if ((buflen -= 8) < 0)
1602 goto out_resource;
1603 dummy64 = (u64)stat.blocks << 9;
1604 WRITE64(dummy64);
1605 }
1606 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1607 if ((buflen -= 12) < 0)
1608 goto out_resource;
1609 WRITE32(0);
1610 WRITE32(stat.atime.tv_sec);
1611 WRITE32(stat.atime.tv_nsec);
1612 }
1613 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1614 if ((buflen -= 12) < 0)
1615 goto out_resource;
1616 WRITE32(0);
1617 WRITE32(1);
1618 WRITE32(0);
1619 }
1620 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1621 if ((buflen -= 12) < 0)
1622 goto out_resource;
1623 WRITE32(0);
1624 WRITE32(stat.ctime.tv_sec);
1625 WRITE32(stat.ctime.tv_nsec);
1626 }
1627 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1628 if ((buflen -= 12) < 0)
1629 goto out_resource;
1630 WRITE32(0);
1631 WRITE32(stat.mtime.tv_sec);
1632 WRITE32(stat.mtime.tv_nsec);
1633 }
1634 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1635 struct dentry *mnt_pnt, *mnt_root;
1636
1637 if ((buflen -= 8) < 0)
1638 goto out_resource;
1639 mnt_root = exp->ex_mnt->mnt_root;
1640 if (mnt_root->d_inode == dentry->d_inode) {
1641 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1642 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1643 } else
1644 WRITE64((u64) stat.ino);
1645 }
1646 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1647 *countp = p - buffer;
1648 status = nfs_ok;
1649
1650out:
1651 nfs4_acl_free(acl);
1652 if (fhp == &tempfh)
1653 fh_put(&tempfh);
1654 return status;
1655out_nfserr:
1656 status = nfserrno(status);
1657 goto out;
1658out_resource:
1659 *countp = 0;
1660 status = nfserr_resource;
1661 goto out;
1662out_serverfault:
1663 status = nfserr_serverfault;
1664 goto out;
1665}
1666
1667static int
1668nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1669 const char *name, int namlen, u32 *p, int *buflen)
1670{
1671 struct svc_export *exp = cd->rd_fhp->fh_export;
1672 struct dentry *dentry;
1673 int nfserr;
1674
1675 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1676 if (IS_ERR(dentry))
1677 return nfserrno(PTR_ERR(dentry));
1678
1679 exp_get(exp);
1680 if (d_mountpoint(dentry)) {
1681 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1682 /*
1683 * -EAGAIN is the only error returned from
1684 * nfsd_cross_mnt() and it indicates that an
1685 * up-call has been initiated to fill in the export
1686 * options on exp. When the answer comes back,
1687 * this call will be retried.
1688 */
1689 nfserr = nfserr_dropit;
1690 goto out_put;
1691 }
1692
1693 }
1694 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1695 cd->rd_rqstp);
1696out_put:
1697 dput(dentry);
1698 exp_put(exp);
1699 return nfserr;
1700}
1701
1702static u32 *
1703nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1704{
1705 u32 *attrlenp;
1706
1707 if (buflen < 6)
1708 return NULL;
1709 *p++ = htonl(2);
1710 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1711 *p++ = htonl(0); /* bmval1 */
1712
1713 attrlenp = p++;
1714 *p++ = nfserr; /* no htonl */
1715 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1716 return p;
1717}
1718
1719static int
1720nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1721 loff_t offset, ino_t ino, unsigned int d_type)
1722{
1723 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1724 int buflen;
1725 u32 *p = cd->buffer;
1726 int nfserr = nfserr_toosmall;
1727
1728 /* In nfsv4, "." and ".." never make it onto the wire.. */
1729 if (name && isdotent(name, namlen)) {
1730 cd->common.err = nfs_ok;
1731 return 0;
1732 }
1733
1734 if (cd->offset)
1735 xdr_encode_hyper(cd->offset, (u64) offset);
1736
1737 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1738 if (buflen < 0)
1739 goto fail;
1740
1741 *p++ = xdr_one; /* mark entry present */
1742 cd->offset = p; /* remember pointer */
1743 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1744 p = xdr_encode_array(p, name, namlen); /* name length & name */
1745
1746 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1747 switch (nfserr) {
1748 case nfs_ok:
1749 p += buflen;
1750 break;
1751 case nfserr_resource:
1752 nfserr = nfserr_toosmall;
1753 goto fail;
1754 case nfserr_dropit:
1755 goto fail;
1756 default:
1757 /*
1758 * If the client requested the RDATTR_ERROR attribute,
1759 * we stuff the error code into this attribute
1760 * and continue. If this attribute was not requested,
1761 * then in accordance with the spec, we fail the
1762 * entire READDIR operation(!)
1763 */
1764 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1765 goto fail;
1766 nfserr = nfserr_toosmall;
1767 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1768 if (p == NULL)
1769 goto fail;
1770 }
1771 cd->buflen -= (p - cd->buffer);
1772 cd->buffer = p;
1773 cd->common.err = nfs_ok;
1774 return 0;
1775fail:
1776 cd->common.err = nfserr;
1777 return -EINVAL;
1778}
1779
1780static void
1781nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1782{
1783 ENCODE_HEAD;
1784
1785 if (!nfserr) {
1786 RESERVE_SPACE(8);
1787 WRITE32(access->ac_supported);
1788 WRITE32(access->ac_resp_access);
1789 ADJUST_ARGS();
1790 }
1791}
1792
1793static void
1794nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1795{
1796 ENCODE_SEQID_OP_HEAD;
1797
1798 if (!nfserr) {
1799 RESERVE_SPACE(sizeof(stateid_t));
1800 WRITE32(close->cl_stateid.si_generation);
1801 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1802 ADJUST_ARGS();
1803 }
1804 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1805}
1806
1807
1808static void
1809nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1810{
1811 ENCODE_HEAD;
1812
1813 if (!nfserr) {
1814 RESERVE_SPACE(8);
1815 WRITEMEM(commit->co_verf.data, 8);
1816 ADJUST_ARGS();
1817 }
1818}
1819
1820static void
1821nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1822{
1823 ENCODE_HEAD;
1824
1825 if (!nfserr) {
1826 RESERVE_SPACE(32);
1827 WRITECINFO(create->cr_cinfo);
1828 WRITE32(2);
1829 WRITE32(create->cr_bmval[0]);
1830 WRITE32(create->cr_bmval[1]);
1831 ADJUST_ARGS();
1832 }
1833}
1834
1835static int
1836nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1837{
1838 struct svc_fh *fhp = getattr->ga_fhp;
1839 int buflen;
1840
1841 if (nfserr)
1842 return nfserr;
1843
1844 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1845 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1846 resp->p, &buflen, getattr->ga_bmval,
1847 resp->rqstp);
1848
1849 if (!nfserr)
1850 resp->p += buflen;
1851 return nfserr;
1852}
1853
1854static void
1855nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1856{
1857 unsigned int len;
1858 ENCODE_HEAD;
1859
1860 if (!nfserr) {
1861 len = fhp->fh_handle.fh_size;
1862 RESERVE_SPACE(len + 4);
1863 WRITE32(len);
1864 WRITEMEM(&fhp->fh_handle.fh_base, len);
1865 ADJUST_ARGS();
1866 }
1867}
1868
1869/*
1870* Including all fields other than the name, a LOCK4denied structure requires
1871* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1872*/
1873static void
1874nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1875{
1876 ENCODE_HEAD;
1877
1878 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1879 WRITE64(ld->ld_start);
1880 WRITE64(ld->ld_length);
1881 WRITE32(ld->ld_type);
1882 if (ld->ld_sop) {
1883 WRITEMEM(&ld->ld_clientid, 8);
1884 WRITE32(ld->ld_sop->so_owner.len);
1885 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1886 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
1887 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
1888 WRITE64((u64)0); /* clientid */
1889 WRITE32(0); /* length of owner name */
1890 }
1891 ADJUST_ARGS();
1892}
1893
1894static void
1895nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1896{
1897
1898 ENCODE_SEQID_OP_HEAD;
1899
1900 if (!nfserr) {
1901 RESERVE_SPACE(4 + sizeof(stateid_t));
1902 WRITE32(lock->lk_resp_stateid.si_generation);
1903 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1904 ADJUST_ARGS();
1905 } else if (nfserr == nfserr_denied)
1906 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1907
1908 ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
1909}
1910
1911static void
1912nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1913{
1914 if (nfserr == nfserr_denied)
1915 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1916}
1917
1918static void
1919nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1920{
1921 ENCODE_SEQID_OP_HEAD;
1922
1923 if (!nfserr) {
1924 RESERVE_SPACE(sizeof(stateid_t));
1925 WRITE32(locku->lu_stateid.si_generation);
1926 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1927 ADJUST_ARGS();
1928 }
1929
1930 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1931}
1932
1933
1934static void
1935nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1936{
1937 ENCODE_HEAD;
1938
1939 if (!nfserr) {
1940 RESERVE_SPACE(20);
1941 WRITECINFO(link->li_cinfo);
1942 ADJUST_ARGS();
1943 }
1944}
1945
1946
1947static void
1948nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1949{
1950 ENCODE_SEQID_OP_HEAD;
1951
1952 if (nfserr)
1953 goto out;
1954
1955 RESERVE_SPACE(36 + sizeof(stateid_t));
1956 WRITE32(open->op_stateid.si_generation);
1957 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1958 WRITECINFO(open->op_cinfo);
1959 WRITE32(open->op_rflags);
1960 WRITE32(2);
1961 WRITE32(open->op_bmval[0]);
1962 WRITE32(open->op_bmval[1]);
1963 WRITE32(open->op_delegate_type);
1964 ADJUST_ARGS();
1965
1966 switch (open->op_delegate_type) {
1967 case NFS4_OPEN_DELEGATE_NONE:
1968 break;
1969 case NFS4_OPEN_DELEGATE_READ:
1970 RESERVE_SPACE(20 + sizeof(stateid_t));
1971 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1972 WRITE32(0);
1973
1974 /*
1975 * TODO: ACE's in delegations
1976 */
1977 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1978 WRITE32(0);
1979 WRITE32(0);
1980 WRITE32(0); /* XXX: is NULL principal ok? */
1981 ADJUST_ARGS();
1982 break;
1983 case NFS4_OPEN_DELEGATE_WRITE:
1984 RESERVE_SPACE(32 + sizeof(stateid_t));
1985 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1986 WRITE32(0);
1987
1988 /*
1989 * TODO: space_limit's in delegations
1990 */
1991 WRITE32(NFS4_LIMIT_SIZE);
1992 WRITE32(~(u32)0);
1993 WRITE32(~(u32)0);
1994
1995 /*
1996 * TODO: ACE's in delegations
1997 */
1998 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1999 WRITE32(0);
2000 WRITE32(0);
2001 WRITE32(0); /* XXX: is NULL principal ok? */
2002 ADJUST_ARGS();
2003 break;
2004 default:
2005 BUG();
2006 }
2007 /* XXX save filehandle here */
2008out:
2009 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2010}
2011
2012static void
2013nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2014{
2015 ENCODE_SEQID_OP_HEAD;
2016
2017 if (!nfserr) {
2018 RESERVE_SPACE(sizeof(stateid_t));
2019 WRITE32(oc->oc_resp_stateid.si_generation);
2020 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2021 ADJUST_ARGS();
2022 }
2023
2024 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2025}
2026
2027static void
2028nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2029{
2030 ENCODE_SEQID_OP_HEAD;
2031
2032 if (!nfserr) {
2033 RESERVE_SPACE(sizeof(stateid_t));
2034 WRITE32(od->od_stateid.si_generation);
2035 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2036 ADJUST_ARGS();
2037 }
2038
2039 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2040}
2041
2042static int
2043nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2044{
2045 u32 eof;
2046 int v, pn;
2047 unsigned long maxcount;
2048 long len;
2049 ENCODE_HEAD;
2050
2051 if (nfserr)
2052 return nfserr;
2053 if (resp->xbuf->page_len)
2054 return nfserr_resource;
2055
2056 RESERVE_SPACE(8); /* eof flag and byte count */
2057
2058 maxcount = NFSSVC_MAXBLKSIZE;
2059 if (maxcount > read->rd_length)
2060 maxcount = read->rd_length;
2061
2062 len = maxcount;
2063 v = 0;
2064 while (len > 0) {
2065 pn = resp->rqstp->rq_resused;
2066 svc_take_page(resp->rqstp);
2067 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2068 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2069 v++;
2070 len -= PAGE_SIZE;
2071 }
2072 read->rd_vlen = v;
2073
2074 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2075 read->rd_offset, read->rd_iov, read->rd_vlen,
2076 &maxcount);
2077
2078 if (nfserr == nfserr_symlink)
2079 nfserr = nfserr_inval;
2080 if (nfserr)
2081 return nfserr;
2082 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2083
2084 WRITE32(eof);
2085 WRITE32(maxcount);
2086 ADJUST_ARGS();
2087 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2088
2089 resp->xbuf->page_len = maxcount;
2090
2091 /* read zero bytes -> don't set up tail */
2092 if(!maxcount)
2093 return 0;
2094
2095 /* set up page for remaining responses */
2096 svc_take_page(resp->rqstp);
2097 resp->xbuf->tail[0].iov_base =
2098 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2099 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2100 resp->xbuf->tail[0].iov_len = 0;
2101 resp->p = resp->xbuf->tail[0].iov_base;
2102 resp->end = resp->p + PAGE_SIZE/4;
2103
2104 if (maxcount&3) {
2105 *(resp->p)++ = 0;
2106 resp->xbuf->tail[0].iov_base += maxcount&3;
2107 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2108 }
2109 return 0;
2110}
2111
2112static int
2113nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2114{
2115 int maxcount;
2116 char *page;
2117 ENCODE_HEAD;
2118
2119 if (nfserr)
2120 return nfserr;
2121 if (resp->xbuf->page_len)
2122 return nfserr_resource;
2123
2124 svc_take_page(resp->rqstp);
2125 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2126
2127 maxcount = PAGE_SIZE;
2128 RESERVE_SPACE(4);
2129
2130 /*
2131 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2132 * if they would overflow the buffer. Is this kosher in NFSv4? If
2133 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2134 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2135 */
2136 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2137 if (nfserr == nfserr_isdir)
2138 return nfserr_inval;
2139 if (nfserr)
2140 return nfserr;
2141
2142 WRITE32(maxcount);
2143 ADJUST_ARGS();
2144 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2145
2146 svc_take_page(resp->rqstp);
2147 resp->xbuf->tail[0].iov_base =
2148 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2149 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2150 resp->xbuf->tail[0].iov_len = 0;
2151 resp->p = resp->xbuf->tail[0].iov_base;
2152 resp->end = resp->p + PAGE_SIZE/4;
2153
2154 resp->xbuf->page_len = maxcount;
2155 if (maxcount&3) {
2156 *(resp->p)++ = 0;
2157 resp->xbuf->tail[0].iov_base += maxcount&3;
2158 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2159 }
2160 return 0;
2161}
2162
2163static int
2164nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2165{
2166 int maxcount;
2167 loff_t offset;
2168 u32 *page, *savep;
2169 ENCODE_HEAD;
2170
2171 if (nfserr)
2172 return nfserr;
2173 if (resp->xbuf->page_len)
2174 return nfserr_resource;
2175
2176 RESERVE_SPACE(8); /* verifier */
2177 savep = p;
2178
2179 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2180 WRITE32(0);
2181 WRITE32(0);
2182 ADJUST_ARGS();
2183 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2184
2185 maxcount = PAGE_SIZE;
2186 if (maxcount > readdir->rd_maxcount)
2187 maxcount = readdir->rd_maxcount;
2188
2189 /*
2190 * Convert from bytes to words, account for the two words already
2191 * written, make sure to leave two words at the end for the next
2192 * pointer and eof field.
2193 */
2194 maxcount = (maxcount >> 2) - 4;
2195 if (maxcount < 0) {
2196 nfserr = nfserr_toosmall;
2197 goto err_no_verf;
2198 }
2199
2200 svc_take_page(resp->rqstp);
2201 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2202 readdir->common.err = 0;
2203 readdir->buflen = maxcount;
2204 readdir->buffer = page;
2205 readdir->offset = NULL;
2206
2207 offset = readdir->rd_cookie;
2208 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2209 &offset,
2210 &readdir->common, nfsd4_encode_dirent);
2211 if (nfserr == nfs_ok &&
2212 readdir->common.err == nfserr_toosmall &&
2213 readdir->buffer == page)
2214 nfserr = nfserr_toosmall;
2215 if (nfserr == nfserr_symlink)
2216 nfserr = nfserr_notdir;
2217 if (nfserr)
2218 goto err_no_verf;
2219
2220 if (readdir->offset)
2221 xdr_encode_hyper(readdir->offset, offset);
2222
2223 p = readdir->buffer;
2224 *p++ = 0; /* no more entries */
2225 *p++ = htonl(readdir->common.err == nfserr_eof);
2226 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2227
2228 /* allocate a page for the tail */
2229 svc_take_page(resp->rqstp);
2230 resp->xbuf->tail[0].iov_base =
2231 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2232 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2233 resp->xbuf->tail[0].iov_len = 0;
2234 resp->p = resp->xbuf->tail[0].iov_base;
2235 resp->end = resp->p + PAGE_SIZE/4;
2236
2237 return 0;
2238err_no_verf:
2239 p = savep;
2240 ADJUST_ARGS();
2241 return nfserr;
2242}
2243
2244static void
2245nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2246{
2247 ENCODE_HEAD;
2248
2249 if (!nfserr) {
2250 RESERVE_SPACE(20);
2251 WRITECINFO(remove->rm_cinfo);
2252 ADJUST_ARGS();
2253 }
2254}
2255
2256static void
2257nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2258{
2259 ENCODE_HEAD;
2260
2261 if (!nfserr) {
2262 RESERVE_SPACE(40);
2263 WRITECINFO(rename->rn_sinfo);
2264 WRITECINFO(rename->rn_tinfo);
2265 ADJUST_ARGS();
2266 }
2267}
2268
2269/*
2270 * The SETATTR encode routine is special -- it always encodes a bitmap,
2271 * regardless of the error status.
2272 */
2273static void
2274nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2275{
2276 ENCODE_HEAD;
2277
2278 RESERVE_SPACE(12);
2279 if (nfserr) {
2280 WRITE32(2);
2281 WRITE32(0);
2282 WRITE32(0);
2283 }
2284 else {
2285 WRITE32(2);
2286 WRITE32(setattr->sa_bmval[0]);
2287 WRITE32(setattr->sa_bmval[1]);
2288 }
2289 ADJUST_ARGS();
2290}
2291
2292static void
2293nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2294{
2295 ENCODE_HEAD;
2296
2297 if (!nfserr) {
2298 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2299 WRITEMEM(&scd->se_clientid, 8);
2300 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2301 ADJUST_ARGS();
2302 }
2303 else if (nfserr == nfserr_clid_inuse) {
2304 RESERVE_SPACE(8);
2305 WRITE32(0);
2306 WRITE32(0);
2307 ADJUST_ARGS();
2308 }
2309}
2310
2311static void
2312nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2313{
2314 ENCODE_HEAD;
2315
2316 if (!nfserr) {
2317 RESERVE_SPACE(16);
2318 WRITE32(write->wr_bytes_written);
2319 WRITE32(write->wr_how_written);
2320 WRITEMEM(write->wr_verifier.data, 8);
2321 ADJUST_ARGS();
2322 }
2323}
2324
2325void
2326nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2327{
2328 u32 *statp;
2329 ENCODE_HEAD;
2330
2331 RESERVE_SPACE(8);
2332 WRITE32(op->opnum);
2333 statp = p++; /* to be backfilled at the end */
2334 ADJUST_ARGS();
2335
2336 switch (op->opnum) {
2337 case OP_ACCESS:
2338 nfsd4_encode_access(resp, op->status, &op->u.access);
2339 break;
2340 case OP_CLOSE:
2341 nfsd4_encode_close(resp, op->status, &op->u.close);
2342 break;
2343 case OP_COMMIT:
2344 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2345 break;
2346 case OP_CREATE:
2347 nfsd4_encode_create(resp, op->status, &op->u.create);
2348 break;
2349 case OP_DELEGRETURN:
2350 break;
2351 case OP_GETATTR:
2352 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2353 break;
2354 case OP_GETFH:
2355 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2356 break;
2357 case OP_LINK:
2358 nfsd4_encode_link(resp, op->status, &op->u.link);
2359 break;
2360 case OP_LOCK:
2361 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2362 break;
2363 case OP_LOCKT:
2364 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2365 break;
2366 case OP_LOCKU:
2367 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2368 break;
2369 case OP_LOOKUP:
2370 break;
2371 case OP_LOOKUPP:
2372 break;
2373 case OP_NVERIFY:
2374 break;
2375 case OP_OPEN:
2376 nfsd4_encode_open(resp, op->status, &op->u.open);
2377 break;
2378 case OP_OPEN_CONFIRM:
2379 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2380 break;
2381 case OP_OPEN_DOWNGRADE:
2382 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2383 break;
2384 case OP_PUTFH:
2385 break;
2386 case OP_PUTROOTFH:
2387 break;
2388 case OP_READ:
2389 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2390 break;
2391 case OP_READDIR:
2392 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2393 break;
2394 case OP_READLINK:
2395 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2396 break;
2397 case OP_REMOVE:
2398 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2399 break;
2400 case OP_RENAME:
2401 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2402 break;
2403 case OP_RENEW:
2404 break;
2405 case OP_RESTOREFH:
2406 break;
2407 case OP_SAVEFH:
2408 break;
2409 case OP_SETATTR:
2410 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2411 break;
2412 case OP_SETCLIENTID:
2413 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2414 break;
2415 case OP_SETCLIENTID_CONFIRM:
2416 break;
2417 case OP_VERIFY:
2418 break;
2419 case OP_WRITE:
2420 nfsd4_encode_write(resp, op->status, &op->u.write);
2421 break;
2422 case OP_RELEASE_LOCKOWNER:
2423 break;
2424 default:
2425 break;
2426 }
2427
2428 /*
2429 * Note: We write the status directly, instead of using WRITE32(),
2430 * since it is already in network byte order.
2431 */
2432 *statp = op->status;
2433}
2434
2435/*
2436 * Encode the reply stored in the stateowner reply cache
2437 *
2438 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2439 * previously sent already encoded operation.
2440 *
2441 * called with nfs4_lock_state() held
2442 */
2443void
2444nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2445{
2446 ENCODE_HEAD;
2447 struct nfs4_replay *rp = op->replay;
2448
2449 BUG_ON(!rp);
2450
2451 RESERVE_SPACE(8);
2452 WRITE32(op->opnum);
2453 *p++ = rp->rp_status; /* already xdr'ed */
2454 ADJUST_ARGS();
2455
2456 RESERVE_SPACE(rp->rp_buflen);
2457 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2458 ADJUST_ARGS();
2459}
2460
2461/*
2462 * END OF "GENERIC" ENCODE ROUTINES.
2463 */
2464
2465int
2466nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2467{
2468 return xdr_ressize_check(rqstp, p);
2469}
2470
2471void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2472{
2473 if (args->ops != args->iops) {
2474 kfree(args->ops);
2475 args->ops = args->iops;
2476 }
2477 if (args->tmpp) {
2478 kfree(args->tmpp);
2479 args->tmpp = NULL;
2480 }
2481 while (args->to_free) {
2482 struct tmpbuf *tb = args->to_free;
2483 args->to_free = tb->next;
2484 tb->release(tb->buf);
2485 kfree(tb);
2486 }
2487}
2488
2489int
2490nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2491{
2492 int status;
2493
2494 args->p = p;
2495 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2496 args->pagelist = rqstp->rq_arg.pages;
2497 args->pagelen = rqstp->rq_arg.page_len;
2498 args->tmpp = NULL;
2499 args->to_free = NULL;
2500 args->ops = args->iops;
2501 args->rqstp = rqstp;
2502
2503 status = nfsd4_decode_compound(args);
2504 if (status) {
2505 nfsd4_release_compoundargs(args);
2506 }
2507 return !status;
2508}
2509
2510int
2511nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2512{
2513 /*
2514 * All that remains is to write the tag and operation count...
2515 */
2516 struct kvec *iov;
2517 p = resp->tagp;
2518 *p++ = htonl(resp->taglen);
2519 memcpy(p, resp->tag, resp->taglen);
2520 p += XDR_QUADLEN(resp->taglen);
2521 *p++ = htonl(resp->opcnt);
2522
2523 if (rqstp->rq_res.page_len)
2524 iov = &rqstp->rq_res.tail[0];
2525 else
2526 iov = &rqstp->rq_res.head[0];
2527 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2528 BUG_ON(iov->iov_len > PAGE_SIZE);
2529 return 1;
2530}
2531
2532/*
2533 * Local variables:
2534 * c-basic-offset: 8
2535 * End:
2536 */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-21 13:35:11 -0500