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[PATCH] knfsd: nfsd4: xdr encoding for fs_locations
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4
LT		 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
fd39ca9a 139static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
1da177e4
LT		 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 {
f99d49ad 154 kfree(argp->tmpp);
1da177e4
LT		 155 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
156 if (!p)
157 return NULL;
158
159 }
160 memcpy(p, argp->p, avail);
161 /* step to next page */
162 argp->p = page_address(argp->pagelist[0]);
163 argp->pagelist++;
164 if (argp->pagelen < PAGE_SIZE) {
165 argp->end = p + (argp->pagelen>>2);
166 argp->pagelen = 0;
167 } else {
168 argp->end = p + (PAGE_SIZE>>2);
169 argp->pagelen -= PAGE_SIZE;
170 }
171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172 argp->p += XDR_QUADLEN(nbytes - avail);
173 return p;
174}
175
176static int
177defer_free(struct nfsd4_compoundargs *argp,
178 void (*release)(const void *), void *p)
179{
180 struct tmpbuf *tb;
181
182 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
183 if (!tb)
184 return -ENOMEM;
185 tb->buf = p;
186 tb->release = release;
187 tb->next = argp->to_free;
188 argp->to_free = tb;
189 return 0;
190}
191
fd39ca9a 192static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
1da177e4
LT		 193{
194 void *new = NULL;
195 if (p == argp->tmp) {
196 new = kmalloc(nbytes, GFP_KERNEL);
197 if (!new) return NULL;
198 p = new;
199 memcpy(p, argp->tmp, nbytes);
200 } else {
73dff8be 201 BUG_ON(p != argp->tmpp);
1da177e4
LT		 202 argp->tmpp = NULL;
203 }
204 if (defer_free(argp, kfree, p)) {
205 kfree(new);
206 return NULL;
207 } else
208 return (char *)p;
209}
210
211
212static int
213nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
214{
215 u32 bmlen;
216 DECODE_HEAD;
217
218 bmval[0] = 0;
219 bmval[1] = 0;
220
221 READ_BUF(4);
222 READ32(bmlen);
223 if (bmlen > 1000)
224 goto xdr_error;
225
226 READ_BUF(bmlen << 2);
227 if (bmlen > 0)
228 READ32(bmval[0]);
229 if (bmlen > 1)
230 READ32(bmval[1]);
231
232 DECODE_TAIL;
233}
234
235static int
236nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
237 struct nfs4_acl **acl)
238{
239 int expected_len, len = 0;
240 u32 dummy32;
241 char *buf;
242
243 DECODE_HEAD;
244 iattr->ia_valid = 0;
245 if ((status = nfsd4_decode_bitmap(argp, bmval)))
246 return status;
247
248 /*
249 * According to spec, unsupported attributes return ERR_NOTSUPP;
250 * read-only attributes return ERR_INVAL.
251 */
252 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
253 return nfserr_attrnotsupp;
254 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
255 return nfserr_inval;
256
257 READ_BUF(4);
258 READ32(expected_len);
259
260 if (bmval[0] & FATTR4_WORD0_SIZE) {
261 READ_BUF(8);
262 len += 8;
263 READ64(iattr->ia_size);
264 iattr->ia_valid |= ATTR_SIZE;
265 }
266 if (bmval[0] & FATTR4_WORD0_ACL) {
267 int nace, i;
268 struct nfs4_ace ace;
269
270 READ_BUF(4); len += 4;
271 READ32(nace);
272
273 *acl = nfs4_acl_new();
274 if (*acl == NULL) {
275 status = -ENOMEM;
276 goto out_nfserr;
277 }
278 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
279
280 for (i = 0; i < nace; i++) {
281 READ_BUF(16); len += 16;
282 READ32(ace.type);
283 READ32(ace.flag);
284 READ32(ace.access_mask);
285 READ32(dummy32);
286 READ_BUF(dummy32);
287 len += XDR_QUADLEN(dummy32) << 2;
288 READMEM(buf, dummy32);
289 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
290 status = 0;
291 if (ace.whotype != NFS4_ACL_WHO_NAMED)
292 ace.who = 0;
293 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
294 status = nfsd_map_name_to_gid(argp->rqstp,
295 buf, dummy32, &ace.who);
296 else
297 status = nfsd_map_name_to_uid(argp->rqstp,
298 buf, dummy32, &ace.who);
299 if (status)
300 goto out_nfserr;
b905b7b0
N		 301 status = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
302 ace.access_mask, ace.whotype, ace.who);
303 if (status)
1da177e4 304 goto out_nfserr;
1da177e4
LT		 305 }
306 } else
307 *acl = NULL;
308 if (bmval[1] & FATTR4_WORD1_MODE) {
309 READ_BUF(4);
310 len += 4;
311 READ32(iattr->ia_mode);
312 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
313 iattr->ia_valid |= ATTR_MODE;
314 }
315 if (bmval[1] & FATTR4_WORD1_OWNER) {
316 READ_BUF(4);
317 len += 4;
318 READ32(dummy32);
319 READ_BUF(dummy32);
320 len += (XDR_QUADLEN(dummy32) << 2);
321 READMEM(buf, dummy32);
322 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
323 goto out_nfserr;
324 iattr->ia_valid |= ATTR_UID;
325 }
326 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
327 READ_BUF(4);
328 len += 4;
329 READ32(dummy32);
330 READ_BUF(dummy32);
331 len += (XDR_QUADLEN(dummy32) << 2);
332 READMEM(buf, dummy32);
333 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
334 goto out_nfserr;
335 iattr->ia_valid |= ATTR_GID;
336 }
337 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 switch (dummy32) {
342 case NFS4_SET_TO_CLIENT_TIME:
343 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
344 all 32 bits of 'nseconds'. */
345 READ_BUF(12);
346 len += 12;
347 READ32(dummy32);
348 if (dummy32)
349 return nfserr_inval;
350 READ32(iattr->ia_atime.tv_sec);
351 READ32(iattr->ia_atime.tv_nsec);
352 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
353 return nfserr_inval;
354 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
355 break;
356 case NFS4_SET_TO_SERVER_TIME:
357 iattr->ia_valid |= ATTR_ATIME;
358 break;
359 default:
360 goto xdr_error;
361 }
362 }
363 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
364 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
365 all 32 bits of 'nseconds'. */
366 READ_BUF(12);
367 len += 12;
368 READ32(dummy32);
369 if (dummy32)
370 return nfserr_inval;
371 READ32(iattr->ia_ctime.tv_sec);
372 READ32(iattr->ia_ctime.tv_nsec);
373 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
374 return nfserr_inval;
375 iattr->ia_valid |= ATTR_CTIME;
376 }
377 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
378 READ_BUF(4);
379 len += 4;
380 READ32(dummy32);
381 switch (dummy32) {
382 case NFS4_SET_TO_CLIENT_TIME:
383 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
384 all 32 bits of 'nseconds'. */
385 READ_BUF(12);
386 len += 12;
387 READ32(dummy32);
388 if (dummy32)
389 return nfserr_inval;
390 READ32(iattr->ia_mtime.tv_sec);
391 READ32(iattr->ia_mtime.tv_nsec);
392 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
393 return nfserr_inval;
394 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
395 break;
396 case NFS4_SET_TO_SERVER_TIME:
397 iattr->ia_valid |= ATTR_MTIME;
398 break;
399 default:
400 goto xdr_error;
401 }
402 }
403 if (len != expected_len)
404 goto xdr_error;
405
406 DECODE_TAIL;
407
408out_nfserr:
409 status = nfserrno(status);
410 goto out;
411}
412
413static int
414nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
415{
416 DECODE_HEAD;
417
418 READ_BUF(4);
419 READ32(access->ac_req_access);
420
421 DECODE_TAIL;
422}
423
424static int
425nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
426{
427 DECODE_HEAD;
428
429 close->cl_stateowner = NULL;
430 READ_BUF(4 + sizeof(stateid_t));
431 READ32(close->cl_seqid);
432 READ32(close->cl_stateid.si_generation);
433 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
434
435 DECODE_TAIL;
436}
437
438
439static int
440nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
441{
442 DECODE_HEAD;
443
444 READ_BUF(12);
445 READ64(commit->co_offset);
446 READ32(commit->co_count);
447
448 DECODE_TAIL;
449}
450
451static int
452nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
453{
454 DECODE_HEAD;
455
456 READ_BUF(4);
457 READ32(create->cr_type);
458 switch (create->cr_type) {
459 case NF4LNK:
460 READ_BUF(4);
461 READ32(create->cr_linklen);
462 READ_BUF(create->cr_linklen);
463 SAVEMEM(create->cr_linkname, create->cr_linklen);
464 break;
465 case NF4BLK:
466 case NF4CHR:
467 READ_BUF(8);
468 READ32(create->cr_specdata1);
469 READ32(create->cr_specdata2);
470 break;
471 case NF4SOCK:
472 case NF4FIFO:
473 case NF4DIR:
474 default:
475 break;
476 }
477
478 READ_BUF(4);
479 READ32(create->cr_namelen);
480 READ_BUF(create->cr_namelen);
481 SAVEMEM(create->cr_name, create->cr_namelen);
482 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
483 return status;
484
485 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
486 goto out;
487
488 DECODE_TAIL;
489}
490
491static inline int
492nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
493{
494 DECODE_HEAD;
495
496 READ_BUF(sizeof(stateid_t));
497 READ32(dr->dr_stateid.si_generation);
498 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
499
500 DECODE_TAIL;
501}
502
503static inline int
504nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
505{
506 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
507}
508
509static int
510nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
511{
512 DECODE_HEAD;
513
514 READ_BUF(4);
515 READ32(link->li_namelen);
516 READ_BUF(link->li_namelen);
517 SAVEMEM(link->li_name, link->li_namelen);
518 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
519 return status;
520
521 DECODE_TAIL;
522}
523
524static int
525nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
526{
527 DECODE_HEAD;
528
3a65588a 529 lock->lk_replay_owner = NULL;
1da177e4
LT		 530 /*
531 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
532 */
533 READ_BUF(28);
534 READ32(lock->lk_type);
535 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
536 goto xdr_error;
537 READ32(lock->lk_reclaim);
538 READ64(lock->lk_offset);
539 READ64(lock->lk_length);
540 READ32(lock->lk_is_new);
541
542 if (lock->lk_is_new) {
543 READ_BUF(36);
544 READ32(lock->lk_new_open_seqid);
545 READ32(lock->lk_new_open_stateid.si_generation);
546
547 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
548 READ32(lock->lk_new_lock_seqid);
549 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
550 READ32(lock->lk_new_owner.len);
551 READ_BUF(lock->lk_new_owner.len);
552 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
553 } else {
554 READ_BUF(20);
555 READ32(lock->lk_old_lock_stateid.si_generation);
556 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
557 READ32(lock->lk_old_lock_seqid);
558 }
559
560 DECODE_TAIL;
561}
562
563static int
564nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
565{
566 DECODE_HEAD;
567
568 READ_BUF(32);
569 READ32(lockt->lt_type);
570 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
571 goto xdr_error;
572 READ64(lockt->lt_offset);
573 READ64(lockt->lt_length);
574 COPYMEM(&lockt->lt_clientid, 8);
575 READ32(lockt->lt_owner.len);
576 READ_BUF(lockt->lt_owner.len);
577 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
578
579 DECODE_TAIL;
580}
581
582static int
583nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
584{
585 DECODE_HEAD;
586
587 locku->lu_stateowner = NULL;
588 READ_BUF(24 + sizeof(stateid_t));
589 READ32(locku->lu_type);
590 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
591 goto xdr_error;
592 READ32(locku->lu_seqid);
593 READ32(locku->lu_stateid.si_generation);
594 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
595 READ64(locku->lu_offset);
596 READ64(locku->lu_length);
597
598 DECODE_TAIL;
599}
600
601static int
602nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
603{
604 DECODE_HEAD;
605
606 READ_BUF(4);
607 READ32(lookup->lo_len);
608 READ_BUF(lookup->lo_len);
609 SAVEMEM(lookup->lo_name, lookup->lo_len);
610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
611 return status;
612
613 DECODE_TAIL;
614}
615
616static int
617nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
618{
619 DECODE_HEAD;
620
621 memset(open->op_bmval, 0, sizeof(open->op_bmval));
622 open->op_iattr.ia_valid = 0;
623 open->op_stateowner = NULL;
624
625 /* seqid, share_access, share_deny, clientid, ownerlen */
626 READ_BUF(16 + sizeof(clientid_t));
627 READ32(open->op_seqid);
628 READ32(open->op_share_access);
629 READ32(open->op_share_deny);
630 COPYMEM(&open->op_clientid, sizeof(clientid_t));
631 READ32(open->op_owner.len);
632
633 /* owner, open_flag */
634 READ_BUF(open->op_owner.len + 4);
635 SAVEMEM(open->op_owner.data, open->op_owner.len);
636 READ32(open->op_create);
637 switch (open->op_create) {
638 case NFS4_OPEN_NOCREATE:
639 break;
640 case NFS4_OPEN_CREATE:
641 READ_BUF(4);
642 READ32(open->op_createmode);
643 switch (open->op_createmode) {
644 case NFS4_CREATE_UNCHECKED:
645 case NFS4_CREATE_GUARDED:
646 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
647 goto out;
648 break;
649 case NFS4_CREATE_EXCLUSIVE:
650 READ_BUF(8);
651 COPYMEM(open->op_verf.data, 8);
652 break;
653 default:
654 goto xdr_error;
655 }
656 break;
657 default:
658 goto xdr_error;
659 }
660
661 /* open_claim */
662 READ_BUF(4);
663 READ32(open->op_claim_type);
664 switch (open->op_claim_type) {
665 case NFS4_OPEN_CLAIM_NULL:
666 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
667 READ_BUF(4);
668 READ32(open->op_fname.len);
669 READ_BUF(open->op_fname.len);
670 SAVEMEM(open->op_fname.data, open->op_fname.len);
671 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
672 return status;
673 break;
674 case NFS4_OPEN_CLAIM_PREVIOUS:
675 READ_BUF(4);
676 READ32(open->op_delegate_type);
677 break;
678 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
679 READ_BUF(sizeof(stateid_t) + 4);
680 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
681 READ32(open->op_fname.len);
682 READ_BUF(open->op_fname.len);
683 SAVEMEM(open->op_fname.data, open->op_fname.len);
684 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
685 return status;
686 break;
687 default:
688 goto xdr_error;
689 }
690
691 DECODE_TAIL;
692}
693
694static int
695nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
696{
697 DECODE_HEAD;
698
699 open_conf->oc_stateowner = NULL;
700 READ_BUF(4 + sizeof(stateid_t));
701 READ32(open_conf->oc_req_stateid.si_generation);
702 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
703 READ32(open_conf->oc_seqid);
704
705 DECODE_TAIL;
706}
707
708static int
709nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
710{
711 DECODE_HEAD;
712
713 open_down->od_stateowner = NULL;
714 READ_BUF(12 + sizeof(stateid_t));
715 READ32(open_down->od_stateid.si_generation);
716 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
717 READ32(open_down->od_seqid);
718 READ32(open_down->od_share_access);
719 READ32(open_down->od_share_deny);
720
721 DECODE_TAIL;
722}
723
724static int
725nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
726{
727 DECODE_HEAD;
728
729 READ_BUF(4);
730 READ32(putfh->pf_fhlen);
731 if (putfh->pf_fhlen > NFS4_FHSIZE)
732 goto xdr_error;
733 READ_BUF(putfh->pf_fhlen);
734 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
735
736 DECODE_TAIL;
737}
738
739static int
740nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
741{
742 DECODE_HEAD;
743
744 READ_BUF(sizeof(stateid_t) + 12);
745 READ32(read->rd_stateid.si_generation);
746 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
747 READ64(read->rd_offset);
748 READ32(read->rd_length);
749
750 DECODE_TAIL;
751}
752
753static int
754nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
755{
756 DECODE_HEAD;
757
758 READ_BUF(24);
759 READ64(readdir->rd_cookie);
760 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
761 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
762 READ32(readdir->rd_maxcount);
763 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
764 goto out;
765
766 DECODE_TAIL;
767}
768
769static int
770nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
771{
772 DECODE_HEAD;
773
774 READ_BUF(4);
775 READ32(remove->rm_namelen);
776 READ_BUF(remove->rm_namelen);
777 SAVEMEM(remove->rm_name, remove->rm_namelen);
778 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
779 return status;
780
781 DECODE_TAIL;
782}
783
784static int
785nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
786{
787 DECODE_HEAD;
788
789 READ_BUF(4);
790 READ32(rename->rn_snamelen);
791 READ_BUF(rename->rn_snamelen + 4);
792 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
793 READ32(rename->rn_tnamelen);
794 READ_BUF(rename->rn_tnamelen);
795 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
796 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
797 return status;
798 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
799 return status;
800
801 DECODE_TAIL;
802}
803
804static int
805nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
806{
807 DECODE_HEAD;
808
809 READ_BUF(sizeof(clientid_t));
810 COPYMEM(clientid, sizeof(clientid_t));
811
812 DECODE_TAIL;
813}
814
815static int
816nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
817{
818 DECODE_HEAD;
819
820 READ_BUF(sizeof(stateid_t));
821 READ32(setattr->sa_stateid.si_generation);
822 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
823 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
824 goto out;
825
826 DECODE_TAIL;
827}
828
829static int
830nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
831{
832 DECODE_HEAD;
833
834 READ_BUF(12);
835 COPYMEM(setclientid->se_verf.data, 8);
836 READ32(setclientid->se_namelen);
837
838 READ_BUF(setclientid->se_namelen + 8);
839 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
840 READ32(setclientid->se_callback_prog);
841 READ32(setclientid->se_callback_netid_len);
842
843 READ_BUF(setclientid->se_callback_netid_len + 4);
844 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
845 READ32(setclientid->se_callback_addr_len);
846
847 READ_BUF(setclientid->se_callback_addr_len + 4);
848 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
849 READ32(setclientid->se_callback_ident);
850
851 DECODE_TAIL;
852}
853
854static int
855nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
856{
857 DECODE_HEAD;
858
859 READ_BUF(8 + sizeof(nfs4_verifier));
860 COPYMEM(&scd_c->sc_clientid, 8);
861 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
862
863 DECODE_TAIL;
864}
865
866/* Also used for NVERIFY */
867static int
868nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
869{
870#if 0
871 struct nfsd4_compoundargs save = {
872 .p = argp->p,
873 .end = argp->end,
874 .rqstp = argp->rqstp,
875 };
876 u32 ve_bmval[2];
877 struct iattr ve_iattr; /* request */
878 struct nfs4_acl *ve_acl; /* request */
879#endif
880 DECODE_HEAD;
881
882 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
883 goto out;
884
885 /* For convenience's sake, we compare raw xdr'd attributes in
886 * nfsd4_proc_verify; however we still decode here just to return
887 * correct error in case of bad xdr. */
888#if 0
889 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
890 if (status == nfserr_inval) {
891 status = nfserrno(status);
892 goto out;
893 }
894#endif
895 READ_BUF(4);
896 READ32(verify->ve_attrlen);
897 READ_BUF(verify->ve_attrlen);
898 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
899
900 DECODE_TAIL;
901}
902
903static int
904nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
905{
906 int avail;
907 int v;
908 int len;
909 DECODE_HEAD;
910
911 READ_BUF(sizeof(stateid_opaque_t) + 20);
912 READ32(write->wr_stateid.si_generation);
913 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
914 READ64(write->wr_offset);
915 READ32(write->wr_stable_how);
916 if (write->wr_stable_how > 2)
917 goto xdr_error;
918 READ32(write->wr_buflen);
919
920 /* Sorry .. no magic macros for this.. *
921 * READ_BUF(write->wr_buflen);
922 * SAVEMEM(write->wr_buf, write->wr_buflen);
923 */
924 avail = (char*)argp->end - (char*)argp->p;
925 if (avail + argp->pagelen < write->wr_buflen) {
926 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
927 goto xdr_error;
928 }
3cc03b16
N		 929 argp->rqstp->rq_vec[0].iov_base = p;
930 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 931 v = 0;
932 len = write->wr_buflen;
3cc03b16
N		 933 while (len > argp->rqstp->rq_vec[v].iov_len) {
934 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 935 v++;
3cc03b16 936 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 937 argp->pagelist++;
938 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 939 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 940 argp->pagelen -= PAGE_SIZE;
941 } else {
3cc03b16 942 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 943 argp->pagelen -= len;
944 }
945 }
3cc03b16
N		 946 argp->end = (u32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
947 argp->p = (u32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
948 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 949 write->wr_vlen = v+1;
950
951 DECODE_TAIL;
952}
953
954static int
955nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
956{
957 DECODE_HEAD;
958
959 READ_BUF(12);
960 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
961 READ32(rlockowner->rl_owner.len);
962 READ_BUF(rlockowner->rl_owner.len);
963 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
964
965 DECODE_TAIL;
966}
967
968static int
969nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
970{
971 DECODE_HEAD;
972 struct nfsd4_op *op;
973 int i;
974
975 /*
976 * XXX: According to spec, we should check the tag
977 * for UTF-8 compliance. I'm postponing this for
978 * now because it seems that some clients do use
979 * binary tags.
980 */
981 READ_BUF(4);
982 READ32(argp->taglen);
983 READ_BUF(argp->taglen + 8);
984 SAVEMEM(argp->tag, argp->taglen);
985 READ32(argp->minorversion);
986 READ32(argp->opcnt);
987
988 if (argp->taglen > NFSD4_MAX_TAGLEN)
989 goto xdr_error;
990 if (argp->opcnt > 100)
991 goto xdr_error;
992
e8c96f8c 993 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 994 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
995 if (!argp->ops) {
996 argp->ops = argp->iops;
997 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
998 goto xdr_error;
999 }
1000 }
1001
1002 for (i = 0; i < argp->opcnt; i++) {
1003 op = &argp->ops[i];
1004 op->replay = NULL;
1005
1006 /*
1007 * We can't use READ_BUF() here because we need to handle
1008 * a missing opcode as an OP_WRITE + 1. So we need to check
1009 * to see if we're truly at the end of our buffer or if there
1010 * is another page we need to flip to.
1011 */
1012
1013 if (argp->p == argp->end) {
1014 if (argp->pagelen < 4) {
1015 /* There isn't an opcode still on the wire */
1016 op->opnum = OP_WRITE + 1;
1017 op->status = nfserr_bad_xdr;
1018 argp->opcnt = i+1;
1019 break;
1020 }
1021
1022 /*
1023 * False alarm. We just hit a page boundary, but there
1024 * is still data available. Move pointer across page
1025 * boundary. *snip from READ_BUF*
1026 */
1027 argp->p = page_address(argp->pagelist[0]);
1028 argp->pagelist++;
1029 if (argp->pagelen < PAGE_SIZE) {
1030 argp->end = p + (argp->pagelen>>2);
1031 argp->pagelen = 0;
1032 } else {
1033 argp->end = p + (PAGE_SIZE>>2);
1034 argp->pagelen -= PAGE_SIZE;
1035 }
1036 }
1037 op->opnum = ntohl(*argp->p++);
1038
1039 switch (op->opnum) {
1040 case 2: /* Reserved operation */
1041 op->opnum = OP_ILLEGAL;
1042 if (argp->minorversion == 0)
1043 op->status = nfserr_op_illegal;
1044 else
1045 op->status = nfserr_minor_vers_mismatch;
1046 break;
1047 case OP_ACCESS:
1048 op->status = nfsd4_decode_access(argp, &op->u.access);
1049 break;
1050 case OP_CLOSE:
1051 op->status = nfsd4_decode_close(argp, &op->u.close);
1052 break;
1053 case OP_COMMIT:
1054 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1055 break;
1056 case OP_CREATE:
1057 op->status = nfsd4_decode_create(argp, &op->u.create);
1058 break;
1059 case OP_DELEGRETURN:
1060 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1061 break;
1062 case OP_GETATTR:
1063 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1064 break;
1065 case OP_GETFH:
1066 op->status = nfs_ok;
1067 break;
1068 case OP_LINK:
1069 op->status = nfsd4_decode_link(argp, &op->u.link);
1070 break;
1071 case OP_LOCK:
1072 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1073 break;
1074 case OP_LOCKT:
1075 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1076 break;
1077 case OP_LOCKU:
1078 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1079 break;
1080 case OP_LOOKUP:
1081 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1082 break;
1083 case OP_LOOKUPP:
1084 op->status = nfs_ok;
1085 break;
1086 case OP_NVERIFY:
1087 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1088 break;
1089 case OP_OPEN:
1090 op->status = nfsd4_decode_open(argp, &op->u.open);
1091 break;
1092 case OP_OPEN_CONFIRM:
1093 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1094 break;
1095 case OP_OPEN_DOWNGRADE:
1096 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1097 break;
1098 case OP_PUTFH:
1099 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1100 break;
1101 case OP_PUTROOTFH:
1102 op->status = nfs_ok;
1103 break;
1104 case OP_READ:
1105 op->status = nfsd4_decode_read(argp, &op->u.read);
1106 break;
1107 case OP_READDIR:
1108 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1109 break;
1110 case OP_READLINK:
1111 op->status = nfs_ok;
1112 break;
1113 case OP_REMOVE:
1114 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1115 break;
1116 case OP_RENAME:
1117 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1118 break;
1119 case OP_RESTOREFH:
1120 op->status = nfs_ok;
1121 break;
1122 case OP_RENEW:
1123 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1124 break;
1125 case OP_SAVEFH:
1126 op->status = nfs_ok;
1127 break;
1128 case OP_SETATTR:
1129 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1130 break;
1131 case OP_SETCLIENTID:
1132 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1133 break;
1134 case OP_SETCLIENTID_CONFIRM:
1135 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1136 break;
1137 case OP_VERIFY:
1138 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1139 break;
1140 case OP_WRITE:
1141 op->status = nfsd4_decode_write(argp, &op->u.write);
1142 break;
1143 case OP_RELEASE_LOCKOWNER:
1144 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1145 break;
1146 default:
1147 op->opnum = OP_ILLEGAL;
1148 op->status = nfserr_op_illegal;
1149 break;
1150 }
1151
1152 if (op->status) {
1153 argp->opcnt = i+1;
1154 break;
1155 }
1156 }
1157
1158 DECODE_TAIL;
1159}
1160/*
1161 * END OF "GENERIC" DECODE ROUTINES.
1162 */
1163
1164/*
1165 * START OF "GENERIC" ENCODE ROUTINES.
1166 * These may look a little ugly since they are imported from a "generic"
1167 * set of XDR encode/decode routines which are intended to be shared by
1168 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1169 *
1170 * If the pain of reading these is too great, it should be a straightforward
1171 * task to translate them into Linux-specific versions which are more
1172 * consistent with the style used in NFSv2/v3...
1173 */
1174#define ENCODE_HEAD u32 *p
1175
1176#define WRITE32(n) *p++ = htonl(n)
1177#define WRITE64(n) do { \
1178 *p++ = htonl((u32)((n) >> 32)); \
1179 *p++ = htonl((u32)(n)); \
1180} while (0)
1181#define WRITEMEM(ptr,nbytes) do { \
1182 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1183 memcpy(p, ptr, nbytes); \
1184 p += XDR_QUADLEN(nbytes); \
1185} while (0)
1186#define WRITECINFO(c) do { \
1187 *p++ = htonl(c.atomic); \
1188 *p++ = htonl(c.before_ctime_sec); \
1189 *p++ = htonl(c.before_ctime_nsec); \
1190 *p++ = htonl(c.after_ctime_sec); \
1191 *p++ = htonl(c.after_ctime_nsec); \
1192} while (0)
1193
1194#define RESERVE_SPACE(nbytes) do { \
1195 p = resp->p; \
1196 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1197} while (0)
1198#define ADJUST_ARGS() resp->p = p
1199
1200/*
1201 * Header routine to setup seqid operation replay cache
1202 */
1203#define ENCODE_SEQID_OP_HEAD \
1204 u32 *p; \
1205 u32 *save; \
1206 \
1207 save = resp->p;
1208
1209/*
7fb64cee
N		 1210 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1211 * is where sequence id's are incremented, and the replay cache is filled.
1212 * Note that we increment sequence id's here, at the last moment, so we're sure
1213 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1214 */
1215
1216#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1217 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1218 stateowner->so_seqid++; \
1da177e4
LT		 1219 stateowner->so_replay.rp_status = nfserr; \
1220 stateowner->so_replay.rp_buflen = \
1221 (((char *)(resp)->p - (char *)save)); \
1222 memcpy(stateowner->so_replay.rp_buf, save, \
1223 stateowner->so_replay.rp_buflen); \
1224 } } while (0);
1225
81c3f413
BF		 1226/* Encode as an array of strings the string given with components
1227 * seperated @sep.
1228 */
1229static int nfsd4_encode_components(char sep, char *components,
1230 u32 **pp, int *buflen)
1231{
1232 u32 *p = *pp;
1233 u32 *countp = p;
1234 int strlen, count=0;
1235 char *str, *end;
1236
1237 dprintk("nfsd4_encode_components(%s)\n", components);
1238 if ((*buflen -= 4) < 0)
1239 return nfserr_resource;
1240 WRITE32(0); /* We will fill this in with @count later */
1241 end = str = components;
1242 while (*end) {
1243 for (; *end && (*end != sep); end++)
1244 ; /* Point to end of component */
1245 strlen = end - str;
1246 if (strlen) {
1247 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1248 return nfserr_resource;
1249 WRITE32(strlen);
1250 WRITEMEM(str, strlen);
1251 count++;
1252 }
1253 else
1254 end++;
1255 str = end;
1256 }
1257 *pp = p;
1258 p = countp;
1259 WRITE32(count);
1260 return 0;
1261}
1262
1263/*
1264 * encode a location element of a fs_locations structure
1265 */
1266static int nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1267 u32 **pp, int *buflen)
1268{
1269 int status;
1270 u32 *p = *pp;
1271
1272 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1273 if (status)
1274 return status;
1275 status = nfsd4_encode_components('/', location->path, &p, buflen);
1276 if (status)
1277 return status;
1278 *pp = p;
1279 return 0;
1280}
1281
1282/*
1283 * Return the path to an export point in the pseudo filesystem namespace
1284 * Returned string is safe to use as long as the caller holds a reference
1285 * to @exp.
1286 */
1287static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp)
1288{
1289 struct svc_fh tmp_fh;
1290 char *path, *rootpath;
1291 int stat;
1292
1293 fh_init(&tmp_fh, NFS4_FHSIZE);
1294 stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
1295 if (stat)
1296 return ERR_PTR(stat);
1297 rootpath = tmp_fh.fh_export->ex_path;
1298
1299 path = exp->ex_path;
1300
1301 if (strncmp(path, rootpath, strlen(rootpath))) {
1302 printk("nfsd: fs_locations failed;"
1303 "%s is not contained in %s\n", path, rootpath);
1304 return ERR_PTR(-EOPNOTSUPP);
1305 }
1306
1307 return path + strlen(rootpath);
1308}
1309
1310/*
1311 * encode a fs_locations structure
1312 */
1313static int nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1314 struct svc_export *exp,
1315 u32 **pp, int *buflen)
1316{
1317 int status, i;
1318 u32 *p = *pp;
1319 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1320 char *root = nfsd4_path(rqstp, exp);
1321
1322 if (IS_ERR(root))
1323 return PTR_ERR(root);
1324 status = nfsd4_encode_components('/', root, &p, buflen);
1325 if (status)
1326 return status;
1327 if ((*buflen -= 4) < 0)
1328 return nfserr_resource;
1329 WRITE32(fslocs->locations_count);
1330 for (i=0; i<fslocs->locations_count; i++) {
1331 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1332 &p, buflen);
1333 if (status)
1334 return status;
1335 }
1336 *pp = p;
1337 return 0;
1338}
1da177e4
LT		 1339
1340static u32 nfs4_ftypes[16] = {
1341 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1342 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1343 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1344 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1345};
1346
1347static int
1348nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1349 u32 **p, int *buflen)
1350{
1351 int status;
1352
1353 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1354 return nfserr_resource;
1355 if (whotype != NFS4_ACL_WHO_NAMED)
1356 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1357 else if (group)
1358 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1359 else
1360 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1361 if (status < 0)
1362 return nfserrno(status);
1363 *p = xdr_encode_opaque(*p, NULL, status);
1364 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1365 BUG_ON(*buflen < 0);
1366 return 0;
1367}
1368
1369static inline int
1370nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1371{
1372 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1373}
1374
1375static inline int
1376nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1377{
1378 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1379}
1380
1381static inline int
1382nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1383 u32 **p, int *buflen)
1384{
1385 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1386}
1387
1388
1389/*
1390 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1391 * ourselves.
1392 *
1393 * @countp is the buffer size in _words_; upon successful return this becomes
1394 * replaced with the number of words written.
1395 */
1396int
1397nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1398 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1399 struct svc_rqst *rqstp)
1400{
1401 u32 bmval0 = bmval[0];
1402 u32 bmval1 = bmval[1];
1403 struct kstat stat;
1404 struct svc_fh tempfh;
1405 struct kstatfs statfs;
1406 int buflen = *countp << 2;
1407 u32 *attrlenp;
1408 u32 dummy;
1409 u64 dummy64;
1410 u32 *p = buffer;
1411 int status;
1412 int aclsupport = 0;
1413 struct nfs4_acl *acl = NULL;
1414
1415 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1416 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1417 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1418
1419 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1420 if (status)
1421 goto out_nfserr;
1422 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1423 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1424 FATTR4_WORD1_SPACE_TOTAL))) {
726c3342 1425 status = vfs_statfs(dentry, &statfs);
1da177e4
LT		 1426 if (status)
1427 goto out_nfserr;
1428 }
1429 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1430 fh_init(&tempfh, NFS4_FHSIZE);
1431 status = fh_compose(&tempfh, exp, dentry, NULL);
1432 if (status)
1433 goto out;
1434 fhp = &tempfh;
1435 }
1436 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1437 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1438 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1439 aclsupport = (status == 0);
1440 if (bmval0 & FATTR4_WORD0_ACL) {
1441 if (status == -EOPNOTSUPP)
1442 bmval0 &= ~FATTR4_WORD0_ACL;
1443 else if (status == -EINVAL) {
1444 status = nfserr_attrnotsupp;
1445 goto out;
1446 } else if (status != 0)
1447 goto out_nfserr;
1448 }
1449 }
81c3f413
BF		 1450 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1451 if (exp->ex_fslocs.locations == NULL) {
1452 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1453 }
1454 }
1da177e4
LT		 1455 if ((buflen -= 16) < 0)
1456 goto out_resource;
1457
1458 WRITE32(2);
1459 WRITE32(bmval0);
1460 WRITE32(bmval1);
1461 attrlenp = p++; /* to be backfilled later */
1462
1463 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1464 if ((buflen -= 12) < 0)
1465 goto out_resource;
1466 WRITE32(2);
1467 WRITE32(aclsupport ?
1468 NFSD_SUPPORTED_ATTRS_WORD0 :
1469 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1470 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1471 }
1472 if (bmval0 & FATTR4_WORD0_TYPE) {
1473 if ((buflen -= 4) < 0)
1474 goto out_resource;
1475 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1476 if (dummy == NF4BAD)
1477 goto out_serverfault;
1478 WRITE32(dummy);
1479 }
1480 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1481 if ((buflen -= 4) < 0)
1482 goto out_resource;
49640001 1483 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1484 WRITE32(NFS4_FH_PERSISTENT);
49640001 1485 else
e34ac862 1486 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1487 }
1488 if (bmval0 & FATTR4_WORD0_CHANGE) {
1489 /*
1490 * Note: This _must_ be consistent with the scheme for writing
1491 * change_info, so any changes made here must be reflected there
1492 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1493 * macro above.)
1494 */
1495 if ((buflen -= 8) < 0)
1496 goto out_resource;
1497 WRITE32(stat.ctime.tv_sec);
1498 WRITE32(stat.ctime.tv_nsec);
1499 }
1500 if (bmval0 & FATTR4_WORD0_SIZE) {
1501 if ((buflen -= 8) < 0)
1502 goto out_resource;
1503 WRITE64(stat.size);
1504 }
1505 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1506 if ((buflen -= 4) < 0)
1507 goto out_resource;
1508 WRITE32(1);
1509 }
1510 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1511 if ((buflen -= 4) < 0)
1512 goto out_resource;
1513 WRITE32(1);
1514 }
1515 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1516 if ((buflen -= 4) < 0)
1517 goto out_resource;
1518 WRITE32(0);
1519 }
1520 if (bmval0 & FATTR4_WORD0_FSID) {
1521 if ((buflen -= 16) < 0)
1522 goto out_resource;
1523 if (is_fsid(fhp, rqstp->rq_reffh)) {
1524 WRITE64((u64)exp->ex_fsid);
1525 WRITE64((u64)0);
1526 } else {
1527 WRITE32(0);
1528 WRITE32(MAJOR(stat.dev));
1529 WRITE32(0);
1530 WRITE32(MINOR(stat.dev));
1531 }
1532 }
1533 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1534 if ((buflen -= 4) < 0)
1535 goto out_resource;
1536 WRITE32(0);
1537 }
1538 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1539 if ((buflen -= 4) < 0)
1540 goto out_resource;
1541 WRITE32(NFSD_LEASE_TIME);
1542 }
1543 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1544 if ((buflen -= 4) < 0)
1545 goto out_resource;
1546 WRITE32(0);
1547 }
1548 if (bmval0 & FATTR4_WORD0_ACL) {
1549 struct nfs4_ace *ace;
1550 struct list_head *h;
1551
1552 if (acl == NULL) {
1553 if ((buflen -= 4) < 0)
1554 goto out_resource;
1555
1556 WRITE32(0);
1557 goto out_acl;
1558 }
1559 if ((buflen -= 4) < 0)
1560 goto out_resource;
1561 WRITE32(acl->naces);
1562
1563 list_for_each(h, &acl->ace_head) {
1564 ace = list_entry(h, struct nfs4_ace, l_ace);
1565
1566 if ((buflen -= 4*3) < 0)
1567 goto out_resource;
1568 WRITE32(ace->type);
1569 WRITE32(ace->flag);
1570 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1571 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1572 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1573 &p, &buflen);
1574 if (status == nfserr_resource)
1575 goto out_resource;
1576 if (status)
1577 goto out;
1578 }
1579 }
1580out_acl:
1581 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1582 if ((buflen -= 4) < 0)
1583 goto out_resource;
1584 WRITE32(aclsupport ?
1585 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1586 }
1587 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1588 if ((buflen -= 4) < 0)
1589 goto out_resource;
1590 WRITE32(1);
1591 }
1592 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1593 if ((buflen -= 4) < 0)
1594 goto out_resource;
1595 WRITE32(1);
1596 }
1597 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1598 if ((buflen -= 4) < 0)
1599 goto out_resource;
1600 WRITE32(1);
1601 }
1602 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1603 if ((buflen -= 4) < 0)
1604 goto out_resource;
1605 WRITE32(1);
1606 }
1607 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1608 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1609 if (buflen < 0)
1610 goto out_resource;
1611 WRITE32(fhp->fh_handle.fh_size);
1612 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1613 }
1614 if (bmval0 & FATTR4_WORD0_FILEID) {
1615 if ((buflen -= 8) < 0)
1616 goto out_resource;
1617 WRITE64((u64) stat.ino);
1618 }
1619 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1620 if ((buflen -= 8) < 0)
1621 goto out_resource;
1622 WRITE64((u64) statfs.f_ffree);
1623 }
1624 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1625 if ((buflen -= 8) < 0)
1626 goto out_resource;
1627 WRITE64((u64) statfs.f_ffree);
1628 }
1629 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1630 if ((buflen -= 8) < 0)
1631 goto out_resource;
1632 WRITE64((u64) statfs.f_files);
1633 }
81c3f413
BF		 1634 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1635 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1636 if (status == nfserr_resource)
1637 goto out_resource;
1638 if (status)
1639 goto out;
1640 }
1da177e4
LT		 1641 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1642 if ((buflen -= 4) < 0)
1643 goto out_resource;
1644 WRITE32(1);
1645 }
1646 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1647 if ((buflen -= 8) < 0)
1648 goto out_resource;
1649 WRITE64(~(u64)0);
1650 }
1651 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1652 if ((buflen -= 4) < 0)
1653 goto out_resource;
1654 WRITE32(255);
1655 }
1656 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1657 if ((buflen -= 4) < 0)
1658 goto out_resource;
1659 WRITE32(~(u32) 0);
1660 }
1661 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1662 if ((buflen -= 8) < 0)
1663 goto out_resource;
7adae489 1664 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1665 }
1666 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1667 if ((buflen -= 8) < 0)
1668 goto out_resource;
7adae489 1669 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1670 }
1671 if (bmval1 & FATTR4_WORD1_MODE) {
1672 if ((buflen -= 4) < 0)
1673 goto out_resource;
1674 WRITE32(stat.mode & S_IALLUGO);
1675 }
1676 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1677 if ((buflen -= 4) < 0)
1678 goto out_resource;
1679 WRITE32(1);
1680 }
1681 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1682 if ((buflen -= 4) < 0)
1683 goto out_resource;
1684 WRITE32(stat.nlink);
1685 }
1686 if (bmval1 & FATTR4_WORD1_OWNER) {
1687 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1688 if (status == nfserr_resource)
1689 goto out_resource;
1690 if (status)
1691 goto out;
1692 }
1693 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1694 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1695 if (status == nfserr_resource)
1696 goto out_resource;
1697 if (status)
1698 goto out;
1699 }
1700 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1701 if ((buflen -= 8) < 0)
1702 goto out_resource;
1703 WRITE32((u32) MAJOR(stat.rdev));
1704 WRITE32((u32) MINOR(stat.rdev));
1705 }
1706 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1707 if ((buflen -= 8) < 0)
1708 goto out_resource;
1709 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1710 WRITE64(dummy64);
1711 }
1712 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1713 if ((buflen -= 8) < 0)
1714 goto out_resource;
1715 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1716 WRITE64(dummy64);
1717 }
1718 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1719 if ((buflen -= 8) < 0)
1720 goto out_resource;
1721 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1722 WRITE64(dummy64);
1723 }
1724 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1725 if ((buflen -= 8) < 0)
1726 goto out_resource;
1727 dummy64 = (u64)stat.blocks << 9;
1728 WRITE64(dummy64);
1729 }
1730 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1731 if ((buflen -= 12) < 0)
1732 goto out_resource;
1733 WRITE32(0);
1734 WRITE32(stat.atime.tv_sec);
1735 WRITE32(stat.atime.tv_nsec);
1736 }
1737 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1738 if ((buflen -= 12) < 0)
1739 goto out_resource;
1740 WRITE32(0);
1741 WRITE32(1);
1742 WRITE32(0);
1743 }
1744 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1745 if ((buflen -= 12) < 0)
1746 goto out_resource;
1747 WRITE32(0);
1748 WRITE32(stat.ctime.tv_sec);
1749 WRITE32(stat.ctime.tv_nsec);
1750 }
1751 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1752 if ((buflen -= 12) < 0)
1753 goto out_resource;
1754 WRITE32(0);
1755 WRITE32(stat.mtime.tv_sec);
1756 WRITE32(stat.mtime.tv_nsec);
1757 }
1758 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1759 struct dentry *mnt_pnt, *mnt_root;
1760
1761 if ((buflen -= 8) < 0)
1762 goto out_resource;
1763 mnt_root = exp->ex_mnt->mnt_root;
1764 if (mnt_root->d_inode == dentry->d_inode) {
1765 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1766 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1767 } else
1768 WRITE64((u64) stat.ino);
1769 }
1770 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1771 *countp = p - buffer;
1772 status = nfs_ok;
1773
1774out:
1775 nfs4_acl_free(acl);
1776 if (fhp == &tempfh)
1777 fh_put(&tempfh);
1778 return status;
1779out_nfserr:
1780 status = nfserrno(status);
1781 goto out;
1782out_resource:
1783 *countp = 0;
1784 status = nfserr_resource;
1785 goto out;
1786out_serverfault:
1787 status = nfserr_serverfault;
1788 goto out;
1789}
1790
1791static int
1792nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1793 const char *name, int namlen, u32 *p, int *buflen)
1794{
1795 struct svc_export *exp = cd->rd_fhp->fh_export;
1796 struct dentry *dentry;
1797 int nfserr;
1798
1799 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1800 if (IS_ERR(dentry))
1801 return nfserrno(PTR_ERR(dentry));
1802
1803 exp_get(exp);
1804 if (d_mountpoint(dentry)) {
1805 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1806 /*
1807 * -EAGAIN is the only error returned from
1808 * nfsd_cross_mnt() and it indicates that an
1809 * up-call has been initiated to fill in the export
1810 * options on exp. When the answer comes back,
1811 * this call will be retried.
1812 */
1813 nfserr = nfserr_dropit;
1814 goto out_put;
1815 }
1816
1817 }
1818 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1819 cd->rd_rqstp);
1820out_put:
1821 dput(dentry);
1822 exp_put(exp);
1823 return nfserr;
1824}
1825
1826static u32 *
1827nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1828{
1829 u32 *attrlenp;
1830
1831 if (buflen < 6)
1832 return NULL;
1833 *p++ = htonl(2);
1834 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1835 *p++ = htonl(0); /* bmval1 */
1836
1837 attrlenp = p++;
1838 *p++ = nfserr; /* no htonl */
1839 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1840 return p;
1841}
1842
1843static int
1844nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1845 loff_t offset, ino_t ino, unsigned int d_type)
1846{
1847 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1848 int buflen;
1849 u32 *p = cd->buffer;
1850 int nfserr = nfserr_toosmall;
1851
1852 /* In nfsv4, "." and ".." never make it onto the wire.. */
1853 if (name && isdotent(name, namlen)) {
1854 cd->common.err = nfs_ok;
1855 return 0;
1856 }
1857
1858 if (cd->offset)
1859 xdr_encode_hyper(cd->offset, (u64) offset);
1860
1861 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1862 if (buflen < 0)
1863 goto fail;
1864
1865 *p++ = xdr_one; /* mark entry present */
1866 cd->offset = p; /* remember pointer */
1867 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1868 p = xdr_encode_array(p, name, namlen); /* name length & name */
1869
1870 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1871 switch (nfserr) {
1872 case nfs_ok:
1873 p += buflen;
1874 break;
1875 case nfserr_resource:
1876 nfserr = nfserr_toosmall;
1877 goto fail;
1878 case nfserr_dropit:
1879 goto fail;
1880 default:
1881 /*
1882 * If the client requested the RDATTR_ERROR attribute,
1883 * we stuff the error code into this attribute
1884 * and continue. If this attribute was not requested,
1885 * then in accordance with the spec, we fail the
1886 * entire READDIR operation(!)
1887 */
1888 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1889 goto fail;
1da177e4 1890 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 1891 if (p == NULL) {
1892 nfserr = nfserr_toosmall;
1da177e4 1893 goto fail;
34081efc 1894 }
1da177e4
LT		 1895 }
1896 cd->buflen -= (p - cd->buffer);
1897 cd->buffer = p;
1898 cd->common.err = nfs_ok;
1899 return 0;
1900fail:
1901 cd->common.err = nfserr;
1902 return -EINVAL;
1903}
1904
1905static void
1906nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1907{
1908 ENCODE_HEAD;
1909
1910 if (!nfserr) {
1911 RESERVE_SPACE(8);
1912 WRITE32(access->ac_supported);
1913 WRITE32(access->ac_resp_access);
1914 ADJUST_ARGS();
1915 }
1916}
1917
1918static void
1919nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1920{
1921 ENCODE_SEQID_OP_HEAD;
1922
1923 if (!nfserr) {
1924 RESERVE_SPACE(sizeof(stateid_t));
1925 WRITE32(close->cl_stateid.si_generation);
1926 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1927 ADJUST_ARGS();
1928 }
1929 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1930}
1931
1932
1933static void
1934nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1935{
1936 ENCODE_HEAD;
1937
1938 if (!nfserr) {
1939 RESERVE_SPACE(8);
1940 WRITEMEM(commit->co_verf.data, 8);
1941 ADJUST_ARGS();
1942 }
1943}
1944
1945static void
1946nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1947{
1948 ENCODE_HEAD;
1949
1950 if (!nfserr) {
1951 RESERVE_SPACE(32);
1952 WRITECINFO(create->cr_cinfo);
1953 WRITE32(2);
1954 WRITE32(create->cr_bmval[0]);
1955 WRITE32(create->cr_bmval[1]);
1956 ADJUST_ARGS();
1957 }
1958}
1959
1960static int
1961nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1962{
1963 struct svc_fh *fhp = getattr->ga_fhp;
1964 int buflen;
1965
1966 if (nfserr)
1967 return nfserr;
1968
1969 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1970 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1971 resp->p, &buflen, getattr->ga_bmval,
1972 resp->rqstp);
1973
1974 if (!nfserr)
1975 resp->p += buflen;
1976 return nfserr;
1977}
1978
1979static void
1980nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1981{
1982 unsigned int len;
1983 ENCODE_HEAD;
1984
1985 if (!nfserr) {
1986 len = fhp->fh_handle.fh_size;
1987 RESERVE_SPACE(len + 4);
1988 WRITE32(len);
1989 WRITEMEM(&fhp->fh_handle.fh_base, len);
1990 ADJUST_ARGS();
1991 }
1992}
1993
1994/*
1995* Including all fields other than the name, a LOCK4denied structure requires
1996* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1997*/
1998static void
1999nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2000{
2001 ENCODE_HEAD;
2002
2003 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2004 WRITE64(ld->ld_start);
2005 WRITE64(ld->ld_length);
2006 WRITE32(ld->ld_type);
2007 if (ld->ld_sop) {
2008 WRITEMEM(&ld->ld_clientid, 8);
2009 WRITE32(ld->ld_sop->so_owner.len);
2010 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2011 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2012 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2013 WRITE64((u64)0); /* clientid */
2014 WRITE32(0); /* length of owner name */
2015 }
2016 ADJUST_ARGS();
2017}
2018
2019static void
2020nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
2021{
1da177e4
LT		 2022 ENCODE_SEQID_OP_HEAD;
2023
2024 if (!nfserr) {
2025 RESERVE_SPACE(4 + sizeof(stateid_t));
2026 WRITE32(lock->lk_resp_stateid.si_generation);
2027 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2028 ADJUST_ARGS();
2029 } else if (nfserr == nfserr_denied)
2030 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2031
3a65588a 2032 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1da177e4
LT		 2033}
2034
2035static void
2036nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
2037{
2038 if (nfserr == nfserr_denied)
2039 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2040}
2041
2042static void
2043nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
2044{
2045 ENCODE_SEQID_OP_HEAD;
2046
2047 if (!nfserr) {
2048 RESERVE_SPACE(sizeof(stateid_t));
2049 WRITE32(locku->lu_stateid.si_generation);
2050 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2051 ADJUST_ARGS();
2052 }
2053
2054 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2055}
2056
2057
2058static void
2059nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
2060{
2061 ENCODE_HEAD;
2062
2063 if (!nfserr) {
2064 RESERVE_SPACE(20);
2065 WRITECINFO(link->li_cinfo);
2066 ADJUST_ARGS();
2067 }
2068}
2069
2070
2071static void
2072nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
2073{
2074 ENCODE_SEQID_OP_HEAD;
2075
2076 if (nfserr)
2077 goto out;
2078
2079 RESERVE_SPACE(36 + sizeof(stateid_t));
2080 WRITE32(open->op_stateid.si_generation);
2081 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2082 WRITECINFO(open->op_cinfo);
2083 WRITE32(open->op_rflags);
2084 WRITE32(2);
2085 WRITE32(open->op_bmval[0]);
2086 WRITE32(open->op_bmval[1]);
2087 WRITE32(open->op_delegate_type);
2088 ADJUST_ARGS();
2089
2090 switch (open->op_delegate_type) {
2091 case NFS4_OPEN_DELEGATE_NONE:
2092 break;
2093 case NFS4_OPEN_DELEGATE_READ:
2094 RESERVE_SPACE(20 + sizeof(stateid_t));
2095 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
7b190fec 2096 WRITE32(open->op_recall);
1da177e4
LT		 2097
2098 /*
2099 * TODO: ACE's in delegations
2100 */
2101 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2102 WRITE32(0);
2103 WRITE32(0);
2104 WRITE32(0); /* XXX: is NULL principal ok? */
2105 ADJUST_ARGS();
2106 break;
2107 case NFS4_OPEN_DELEGATE_WRITE:
2108 RESERVE_SPACE(32 + sizeof(stateid_t));
2109 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2110 WRITE32(0);
2111
2112 /*
2113 * TODO: space_limit's in delegations
2114 */
2115 WRITE32(NFS4_LIMIT_SIZE);
2116 WRITE32(~(u32)0);
2117 WRITE32(~(u32)0);
2118
2119 /*
2120 * TODO: ACE's in delegations
2121 */
2122 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2123 WRITE32(0);
2124 WRITE32(0);
2125 WRITE32(0); /* XXX: is NULL principal ok? */
2126 ADJUST_ARGS();
2127 break;
2128 default:
2129 BUG();
2130 }
2131 /* XXX save filehandle here */
2132out:
2133 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2134}
2135
2136static void
2137nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2138{
2139 ENCODE_SEQID_OP_HEAD;
2140
2141 if (!nfserr) {
2142 RESERVE_SPACE(sizeof(stateid_t));
2143 WRITE32(oc->oc_resp_stateid.si_generation);
2144 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2145 ADJUST_ARGS();
2146 }
2147
2148 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2149}
2150
2151static void
2152nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2153{
2154 ENCODE_SEQID_OP_HEAD;
2155
2156 if (!nfserr) {
2157 RESERVE_SPACE(sizeof(stateid_t));
2158 WRITE32(od->od_stateid.si_generation);
2159 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2160 ADJUST_ARGS();
2161 }
2162
2163 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2164}
2165
2166static int
44524359
N		 2167nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr,
2168 struct nfsd4_read *read)
1da177e4
LT		 2169{
2170 u32 eof;
2171 int v, pn;
2172 unsigned long maxcount;
2173 long len;
2174 ENCODE_HEAD;
2175
2176 if (nfserr)
2177 return nfserr;
2178 if (resp->xbuf->page_len)
2179 return nfserr_resource;
2180
2181 RESERVE_SPACE(8); /* eof flag and byte count */
2182
7adae489 2183 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2184 if (maxcount > read->rd_length)
2185 maxcount = read->rd_length;
2186
2187 len = maxcount;
2188 v = 0;
2189 while (len > 0) {
44524359 2190 pn = resp->rqstp->rq_resused++;
3cc03b16 2191 resp->rqstp->rq_vec[v].iov_base =
44524359 2192 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2193 resp->rqstp->rq_vec[v].iov_len =
44524359 2194 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2195 v++;
2196 len -= PAGE_SIZE;
2197 }
2198 read->rd_vlen = v;
2199
2200 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2201 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2202 &maxcount);
2203
2204 if (nfserr == nfserr_symlink)
2205 nfserr = nfserr_inval;
2206 if (nfserr)
2207 return nfserr;
44524359
N		 2208 eof = (read->rd_offset + maxcount >=
2209 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2210
2211 WRITE32(eof);
2212 WRITE32(maxcount);
2213 ADJUST_ARGS();
6ed6decc
N		 2214 resp->xbuf->head[0].iov_len = (char*)p
2215 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2216 resp->xbuf->page_len = maxcount;
2217
6ed6decc 2218 /* Use rest of head for padding and remaining ops: */
6ed6decc 2219 resp->xbuf->tail[0].iov_base = p;
1da177e4 2220 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2221 if (maxcount&3) {
6ed6decc
N		 2222 RESERVE_SPACE(4);
2223 WRITE32(0);
1da177e4
LT		 2224 resp->xbuf->tail[0].iov_base += maxcount&3;
2225 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2226 ADJUST_ARGS();
1da177e4
LT		 2227 }
2228 return 0;
2229}
2230
2231static int
2232nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2233{
2234 int maxcount;
2235 char *page;
2236 ENCODE_HEAD;
2237
2238 if (nfserr)
2239 return nfserr;
2240 if (resp->xbuf->page_len)
2241 return nfserr_resource;
2242
44524359 2243 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2244
2245 maxcount = PAGE_SIZE;
2246 RESERVE_SPACE(4);
2247
2248 /*
2249 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2250 * if they would overflow the buffer. Is this kosher in NFSv4? If
2251 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2252 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2253 */
2254 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2255 if (nfserr == nfserr_isdir)
2256 return nfserr_inval;
2257 if (nfserr)
2258 return nfserr;
2259
2260 WRITE32(maxcount);
2261 ADJUST_ARGS();
6ed6decc
N		 2262 resp->xbuf->head[0].iov_len = (char*)p
2263 - (char*)resp->xbuf->head[0].iov_base;
2264 resp->xbuf->page_len = maxcount;
1da177e4 2265
6ed6decc 2266 /* Use rest of head for padding and remaining ops: */
6ed6decc 2267 resp->xbuf->tail[0].iov_base = p;
1da177e4 2268 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2269 if (maxcount&3) {
6ed6decc
N		 2270 RESERVE_SPACE(4);
2271 WRITE32(0);
1da177e4
LT		 2272 resp->xbuf->tail[0].iov_base += maxcount&3;
2273 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2274 ADJUST_ARGS();
1da177e4
LT		 2275 }
2276 return 0;
2277}
2278
2279static int
2280nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2281{
2282 int maxcount;
2283 loff_t offset;
bb6e8a9f 2284 u32 *page, *savep, *tailbase;
1da177e4
LT		 2285 ENCODE_HEAD;
2286
2287 if (nfserr)
2288 return nfserr;
2289 if (resp->xbuf->page_len)
2290 return nfserr_resource;
2291
2292 RESERVE_SPACE(8); /* verifier */
2293 savep = p;
2294
2295 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2296 WRITE32(0);
2297 WRITE32(0);
2298 ADJUST_ARGS();
2299 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2300 tailbase = p;
1da177e4
LT		 2301
2302 maxcount = PAGE_SIZE;
2303 if (maxcount > readdir->rd_maxcount)
2304 maxcount = readdir->rd_maxcount;
2305
2306 /*
2307 * Convert from bytes to words, account for the two words already
2308 * written, make sure to leave two words at the end for the next
2309 * pointer and eof field.
2310 */
2311 maxcount = (maxcount >> 2) - 4;
2312 if (maxcount < 0) {
2313 nfserr = nfserr_toosmall;
2314 goto err_no_verf;
2315 }
2316
44524359 2317 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2318 readdir->common.err = 0;
2319 readdir->buflen = maxcount;
2320 readdir->buffer = page;
2321 readdir->offset = NULL;
2322
2323 offset = readdir->rd_cookie;
2324 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2325 &offset,
2326 &readdir->common, nfsd4_encode_dirent);
2327 if (nfserr == nfs_ok &&
2328 readdir->common.err == nfserr_toosmall &&
2329 readdir->buffer == page)
2330 nfserr = nfserr_toosmall;
2331 if (nfserr == nfserr_symlink)
2332 nfserr = nfserr_notdir;
2333 if (nfserr)
2334 goto err_no_verf;
2335
2336 if (readdir->offset)
2337 xdr_encode_hyper(readdir->offset, offset);
2338
2339 p = readdir->buffer;
2340 *p++ = 0; /* no more entries */
2341 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2342 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2343 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2344
bb6e8a9f 2345 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2346 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2347 resp->xbuf->tail[0].iov_len = 0;
2348 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2349 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2350
2351 return 0;
2352err_no_verf:
2353 p = savep;
2354 ADJUST_ARGS();
2355 return nfserr;
2356}
2357
2358static void
2359nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2360{
2361 ENCODE_HEAD;
2362
2363 if (!nfserr) {
2364 RESERVE_SPACE(20);
2365 WRITECINFO(remove->rm_cinfo);
2366 ADJUST_ARGS();
2367 }
2368}
2369
2370static void
2371nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2372{
2373 ENCODE_HEAD;
2374
2375 if (!nfserr) {
2376 RESERVE_SPACE(40);
2377 WRITECINFO(rename->rn_sinfo);
2378 WRITECINFO(rename->rn_tinfo);
2379 ADJUST_ARGS();
2380 }
2381}
2382
2383/*
2384 * The SETATTR encode routine is special -- it always encodes a bitmap,
2385 * regardless of the error status.
2386 */
2387static void
2388nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2389{
2390 ENCODE_HEAD;
2391
2392 RESERVE_SPACE(12);
2393 if (nfserr) {
2394 WRITE32(2);
2395 WRITE32(0);
2396 WRITE32(0);
2397 }
2398 else {
2399 WRITE32(2);
2400 WRITE32(setattr->sa_bmval[0]);
2401 WRITE32(setattr->sa_bmval[1]);
2402 }
2403 ADJUST_ARGS();
2404}
2405
2406static void
2407nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2408{
2409 ENCODE_HEAD;
2410
2411 if (!nfserr) {
2412 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2413 WRITEMEM(&scd->se_clientid, 8);
2414 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2415 ADJUST_ARGS();
2416 }
2417 else if (nfserr == nfserr_clid_inuse) {
2418 RESERVE_SPACE(8);
2419 WRITE32(0);
2420 WRITE32(0);
2421 ADJUST_ARGS();
2422 }
2423}
2424
2425static void
2426nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2427{
2428 ENCODE_HEAD;
2429
2430 if (!nfserr) {
2431 RESERVE_SPACE(16);
2432 WRITE32(write->wr_bytes_written);
2433 WRITE32(write->wr_how_written);
2434 WRITEMEM(write->wr_verifier.data, 8);
2435 ADJUST_ARGS();
2436 }
2437}
2438
2439void
2440nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2441{
2442 u32 *statp;
2443 ENCODE_HEAD;
2444
2445 RESERVE_SPACE(8);
2446 WRITE32(op->opnum);
2447 statp = p++; /* to be backfilled at the end */
2448 ADJUST_ARGS();
2449
2450 switch (op->opnum) {
2451 case OP_ACCESS:
2452 nfsd4_encode_access(resp, op->status, &op->u.access);
2453 break;
2454 case OP_CLOSE:
2455 nfsd4_encode_close(resp, op->status, &op->u.close);
2456 break;
2457 case OP_COMMIT:
2458 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2459 break;
2460 case OP_CREATE:
2461 nfsd4_encode_create(resp, op->status, &op->u.create);
2462 break;
2463 case OP_DELEGRETURN:
2464 break;
2465 case OP_GETATTR:
2466 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2467 break;
2468 case OP_GETFH:
2469 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2470 break;
2471 case OP_LINK:
2472 nfsd4_encode_link(resp, op->status, &op->u.link);
2473 break;
2474 case OP_LOCK:
2475 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2476 break;
2477 case OP_LOCKT:
2478 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2479 break;
2480 case OP_LOCKU:
2481 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2482 break;
2483 case OP_LOOKUP:
2484 break;
2485 case OP_LOOKUPP:
2486 break;
2487 case OP_NVERIFY:
2488 break;
2489 case OP_OPEN:
2490 nfsd4_encode_open(resp, op->status, &op->u.open);
2491 break;
2492 case OP_OPEN_CONFIRM:
2493 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2494 break;
2495 case OP_OPEN_DOWNGRADE:
2496 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2497 break;
2498 case OP_PUTFH:
2499 break;
2500 case OP_PUTROOTFH:
2501 break;
2502 case OP_READ:
2503 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2504 break;
2505 case OP_READDIR:
2506 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2507 break;
2508 case OP_READLINK:
2509 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2510 break;
2511 case OP_REMOVE:
2512 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2513 break;
2514 case OP_RENAME:
2515 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2516 break;
2517 case OP_RENEW:
2518 break;
2519 case OP_RESTOREFH:
2520 break;
2521 case OP_SAVEFH:
2522 break;
2523 case OP_SETATTR:
2524 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2525 break;
2526 case OP_SETCLIENTID:
2527 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2528 break;
2529 case OP_SETCLIENTID_CONFIRM:
2530 break;
2531 case OP_VERIFY:
2532 break;
2533 case OP_WRITE:
2534 nfsd4_encode_write(resp, op->status, &op->u.write);
2535 break;
2536 case OP_RELEASE_LOCKOWNER:
2537 break;
2538 default:
2539 break;
2540 }
2541
2542 /*
2543 * Note: We write the status directly, instead of using WRITE32(),
2544 * since it is already in network byte order.
2545 */
2546 *statp = op->status;
2547}
2548
2549/*
2550 * Encode the reply stored in the stateowner reply cache
2551 *
2552 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2553 * previously sent already encoded operation.
2554 *
2555 * called with nfs4_lock_state() held
2556 */
2557void
2558nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2559{
2560 ENCODE_HEAD;
2561 struct nfs4_replay *rp = op->replay;
2562
2563 BUG_ON(!rp);
2564
2565 RESERVE_SPACE(8);
2566 WRITE32(op->opnum);
2567 *p++ = rp->rp_status; /* already xdr'ed */
2568 ADJUST_ARGS();
2569
2570 RESERVE_SPACE(rp->rp_buflen);
2571 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2572 ADJUST_ARGS();
2573}
2574
2575/*
2576 * END OF "GENERIC" ENCODE ROUTINES.
2577 */
2578
2579int
2580nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2581{
2582 return xdr_ressize_check(rqstp, p);
2583}
2584
2585void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2586{
2587 if (args->ops != args->iops) {
2588 kfree(args->ops);
2589 args->ops = args->iops;
2590 }
f99d49ad
JJ		 2591 kfree(args->tmpp);
2592 args->tmpp = NULL;
1da177e4
LT		 2593 while (args->to_free) {
2594 struct tmpbuf *tb = args->to_free;
2595 args->to_free = tb->next;
2596 tb->release(tb->buf);
2597 kfree(tb);
2598 }
2599}
2600
2601int
2602nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2603{
2604 int status;
2605
2606 args->p = p;
2607 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2608 args->pagelist = rqstp->rq_arg.pages;
2609 args->pagelen = rqstp->rq_arg.page_len;
2610 args->tmpp = NULL;
2611 args->to_free = NULL;
2612 args->ops = args->iops;
2613 args->rqstp = rqstp;
2614
2615 status = nfsd4_decode_compound(args);
2616 if (status) {
2617 nfsd4_release_compoundargs(args);
2618 }
2619 return !status;
2620}
2621
2622int
2623nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2624{
2625 /*
2626 * All that remains is to write the tag and operation count...
2627 */
2628 struct kvec *iov;
2629 p = resp->tagp;
2630 *p++ = htonl(resp->taglen);
2631 memcpy(p, resp->tag, resp->taglen);
2632 p += XDR_QUADLEN(resp->taglen);
2633 *p++ = htonl(resp->opcnt);
2634
2635 if (rqstp->rq_res.page_len)
2636 iov = &rqstp->rq_res.tail[0];
2637 else
2638 iov = &rqstp->rq_res.head[0];
2639 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2640 BUG_ON(iov->iov_len > PAGE_SIZE);
2641 return 1;
2642}
2643
2644/*
2645 * Local variables:
2646 * c-basic-offset: 8
2647 * End:
2648 */
Linux kernel - Deliverables
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