blob: 361b4007d4a00867059e885855e26549ea702da3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/nfsd/nfs4proc.c
3 *
4 * Server-side procedures 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 * Note: some routines in this file are just trivial wrappers
38 * (e.g. nfsd4_lookup()) defined solely for the sake of consistent
39 * naming. Since all such routines have been declared "inline",
40 * there shouldn't be any associated overhead. At some point in
41 * the future, I might inline these "by hand" to clean up a
42 * little.
43 */
44
45#include <linux/param.h>
46#include <linux/major.h>
47#include <linux/slab.h>
NeilBrown7e06b7f2005-06-23 22:03:13 -070048#include <linux/file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50#include <linux/sunrpc/svc.h>
51#include <linux/nfsd/nfsd.h>
52#include <linux/nfsd/cache.h>
53#include <linux/nfs4.h>
54#include <linux/nfsd/state.h>
55#include <linux/nfsd/xdr4.h>
56#include <linux/nfs4_acl.h>
57
58#define NFSDDBG_FACILITY NFSDDBG_PROC
59
60static inline void
61fh_dup2(struct svc_fh *dst, struct svc_fh *src)
62{
63 fh_put(dst);
64 dget(src->fh_dentry);
65 if (src->fh_export)
66 cache_get(&src->fh_export->h);
67 *dst = *src;
68}
69
70static int
71do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
72{
73 int accmode, status;
74
75 if (open->op_truncate &&
76 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
77 return nfserr_inval;
78
79 accmode = MAY_NOP;
80 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
81 accmode = MAY_READ;
82 if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
83 accmode |= (MAY_WRITE | MAY_TRUNC);
84 accmode |= MAY_OWNER_OVERRIDE;
85
86 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
87
88 return status;
89}
90
91static int
92do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
93{
94 struct svc_fh resfh;
95 int status;
96
97 fh_init(&resfh, NFS4_FHSIZE);
98 open->op_truncate = 0;
99
100 if (open->op_create) {
101 /*
102 * Note: create modes (UNCHECKED,GUARDED...) are the same
103 * in NFSv4 as in v3.
104 */
105 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
106 open->op_fname.len, &open->op_iattr,
107 &resfh, open->op_createmode,
108 (u32 *)open->op_verf.data, &open->op_truncate);
109 }
110 else {
111 status = nfsd_lookup(rqstp, current_fh,
112 open->op_fname.data, open->op_fname.len, &resfh);
113 fh_unlock(current_fh);
114 }
115
116 if (!status) {
117 set_change_info(&open->op_cinfo, current_fh);
118
119 /* set reply cache */
120 fh_dup2(current_fh, &resfh);
121 open->op_stateowner->so_replay.rp_openfh_len =
122 resfh.fh_handle.fh_size;
123 memcpy(open->op_stateowner->so_replay.rp_openfh,
124 &resfh.fh_handle.fh_base,
125 resfh.fh_handle.fh_size);
126
127 status = do_open_permission(rqstp, current_fh, open);
128 }
129
130 fh_put(&resfh);
131 return status;
132}
133
134static int
135do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
136{
137 int status;
138
139 /* Only reclaims from previously confirmed clients are valid */
140 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
141 return status;
142
143 /* We don't know the target directory, and therefore can not
144 * set the change info
145 */
146
147 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
148
149 /* set replay cache */
150 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
151 memcpy(open->op_stateowner->so_replay.rp_openfh,
152 &current_fh->fh_handle.fh_base,
153 current_fh->fh_handle.fh_size);
154
155 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
156 (open->op_iattr.ia_size == 0);
157
158 status = do_open_permission(rqstp, current_fh, open);
159
160 return status;
161}
162
163
164static inline int
Neil Brownf2327d92005-09-13 01:25:37 -0700165nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, struct nfs4_stateowner **replay_owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
167 int status;
168 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
169 (int)open->op_fname.len, open->op_fname.data,
170 open->op_stateowner);
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 /* This check required by spec. */
173 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
174 return nfserr_inval;
175
176 nfs4_lock_state();
177
178 /* check seqid for replay. set nfs4_owner */
179 status = nfsd4_process_open1(open);
180 if (status == NFSERR_REPLAY_ME) {
181 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
182 fh_put(current_fh);
183 current_fh->fh_handle.fh_size = rp->rp_openfh_len;
184 memcpy(&current_fh->fh_handle.fh_base, rp->rp_openfh,
185 rp->rp_openfh_len);
186 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
187 if (status)
188 dprintk("nfsd4_open: replay failed"
189 " restoring previous filehandle\n");
190 else
191 status = NFSERR_REPLAY_ME;
192 }
193 if (status)
194 goto out;
195 switch (open->op_claim_type) {
NeilBrown0dd3c192005-06-23 22:02:56 -0700196 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
197 status = nfserr_inval;
198 if (open->op_create)
199 goto out;
200 /* fall through */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 case NFS4_OPEN_CLAIM_NULL:
202 /*
203 * (1) set CURRENT_FH to the file being opened,
204 * creating it if necessary, (2) set open->op_cinfo,
205 * (3) set open->op_truncate if the file is to be
206 * truncated after opening, (4) do permission checking.
207 */
208 status = do_open_lookup(rqstp, current_fh, open);
209 if (status)
210 goto out;
211 break;
212 case NFS4_OPEN_CLAIM_PREVIOUS:
213 /*
214 * The CURRENT_FH is already set to the file being
215 * opened. (1) set open->op_cinfo, (2) set
216 * open->op_truncate if the file is to be truncated
217 * after opening, (3) do permission checking.
218 */
219 status = do_open_fhandle(rqstp, current_fh, open);
220 if (status)
221 goto out;
222 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
224 printk("NFSD: unsupported OPEN claim type %d\n",
225 open->op_claim_type);
226 status = nfserr_notsupp;
227 goto out;
228 default:
229 printk("NFSD: Invalid OPEN claim type %d\n",
230 open->op_claim_type);
231 status = nfserr_inval;
232 goto out;
233 }
234 /*
235 * nfsd4_process_open2() does the actual opening of the file. If
236 * successful, it (1) truncates the file if open->op_truncate was
237 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
238 */
239 status = nfsd4_process_open2(rqstp, current_fh, open);
240out:
Neil Brownf2327d92005-09-13 01:25:37 -0700241 if (open->op_stateowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 nfs4_get_stateowner(open->op_stateowner);
Neil Brownf2327d92005-09-13 01:25:37 -0700243 *replay_owner = open->op_stateowner;
244 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 nfs4_unlock_state();
246 return status;
247}
248
249/*
250 * filehandle-manipulating ops.
251 */
252static inline int
253nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
254{
255 if (!current_fh->fh_dentry)
256 return nfserr_nofilehandle;
257
258 *getfh = current_fh;
259 return nfs_ok;
260}
261
262static inline int
263nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
264{
265 fh_put(current_fh);
266 current_fh->fh_handle.fh_size = putfh->pf_fhlen;
267 memcpy(&current_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
268 return fh_verify(rqstp, current_fh, 0, MAY_NOP);
269}
270
271static inline int
272nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
273{
274 int status;
275
276 fh_put(current_fh);
277 status = exp_pseudoroot(rqstp->rq_client, current_fh,
278 &rqstp->rq_chandle);
279 if (!status)
280 status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export));
281 return status;
282}
283
284static inline int
285nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
286{
287 if (!save_fh->fh_dentry)
288 return nfserr_restorefh;
289
290 fh_dup2(current_fh, save_fh);
291 return nfs_ok;
292}
293
294static inline int
295nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
296{
297 if (!current_fh->fh_dentry)
298 return nfserr_nofilehandle;
299
300 fh_dup2(save_fh, current_fh);
301 return nfs_ok;
302}
303
304/*
305 * misc nfsv4 ops
306 */
307static inline int
308nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
309{
310 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
311 return nfserr_inval;
312
313 access->ac_resp_access = access->ac_req_access;
314 return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
315}
316
317static inline int
318nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
319{
320 int status;
321
322 u32 *p = (u32 *)commit->co_verf.data;
323 *p++ = nfssvc_boot.tv_sec;
324 *p++ = nfssvc_boot.tv_usec;
325
326 status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
327 if (status == nfserr_symlink)
328 status = nfserr_inval;
329 return status;
330}
331
332static int
333nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
334{
335 struct svc_fh resfh;
336 int status;
337 dev_t rdev;
338
339 fh_init(&resfh, NFS4_FHSIZE);
340
341 status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
342 if (status == nfserr_symlink)
343 status = nfserr_notdir;
344 if (status)
345 return status;
346
347 switch (create->cr_type) {
348 case NF4LNK:
349 /* ugh! we have to null-terminate the linktext, or
350 * vfs_symlink() will choke. it is always safe to
351 * null-terminate by brute force, since at worst we
352 * will overwrite the first byte of the create namelen
353 * in the XDR buffer, which has already been extracted
354 * during XDR decode.
355 */
356 create->cr_linkname[create->cr_linklen] = 0;
357
358 status = nfsd_symlink(rqstp, current_fh, create->cr_name,
359 create->cr_namelen, create->cr_linkname,
360 create->cr_linklen, &resfh, &create->cr_iattr);
361 break;
362
363 case NF4BLK:
364 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
365 if (MAJOR(rdev) != create->cr_specdata1 ||
366 MINOR(rdev) != create->cr_specdata2)
367 return nfserr_inval;
368 status = nfsd_create(rqstp, current_fh, create->cr_name,
369 create->cr_namelen, &create->cr_iattr,
370 S_IFBLK, rdev, &resfh);
371 break;
372
373 case NF4CHR:
374 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
375 if (MAJOR(rdev) != create->cr_specdata1 ||
376 MINOR(rdev) != create->cr_specdata2)
377 return nfserr_inval;
378 status = nfsd_create(rqstp, current_fh, create->cr_name,
379 create->cr_namelen, &create->cr_iattr,
380 S_IFCHR, rdev, &resfh);
381 break;
382
383 case NF4SOCK:
384 status = nfsd_create(rqstp, current_fh, create->cr_name,
385 create->cr_namelen, &create->cr_iattr,
386 S_IFSOCK, 0, &resfh);
387 break;
388
389 case NF4FIFO:
390 status = nfsd_create(rqstp, current_fh, create->cr_name,
391 create->cr_namelen, &create->cr_iattr,
392 S_IFIFO, 0, &resfh);
393 break;
394
395 case NF4DIR:
396 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
397 status = nfsd_create(rqstp, current_fh, create->cr_name,
398 create->cr_namelen, &create->cr_iattr,
399 S_IFDIR, 0, &resfh);
400 break;
401
402 default:
403 status = nfserr_badtype;
404 }
405
406 if (!status) {
407 fh_unlock(current_fh);
408 set_change_info(&create->cr_cinfo, current_fh);
409 fh_dup2(current_fh, &resfh);
410 }
411
412 fh_put(&resfh);
413 return status;
414}
415
416static inline int
417nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
418{
419 int status;
420
421 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
422 if (status)
423 return status;
424
425 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
426 return nfserr_inval;
427
428 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
429 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
430
431 getattr->ga_fhp = current_fh;
432 return nfs_ok;
433}
434
435static inline int
436nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
437 struct svc_fh *save_fh, struct nfsd4_link *link)
438{
439 int status = nfserr_nofilehandle;
440
441 if (!save_fh->fh_dentry)
442 return status;
443 status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
444 if (!status)
445 set_change_info(&link->li_cinfo, current_fh);
446 return status;
447}
448
449static int
450nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
451{
452 struct svc_fh tmp_fh;
453 int ret;
454
455 fh_init(&tmp_fh, NFS4_FHSIZE);
456 if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
457 &rqstp->rq_chandle)) != 0)
458 return ret;
459 if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
460 fh_put(&tmp_fh);
461 return nfserr_noent;
462 }
463 fh_put(&tmp_fh);
464 return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
465}
466
467static inline int
468nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
469{
470 return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
471}
472
473static inline int
474nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
475{
476 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478 /* no need to check permission - this will be done in nfsd_read() */
479
NeilBrown7e06b7f2005-06-23 22:03:13 -0700480 read->rd_filp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 if (read->rd_offset >= OFFSET_MAX)
482 return nfserr_inval;
483
484 nfs4_lock_state();
485 /* check stateid */
486 if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
NeilBrown7e06b7f2005-06-23 22:03:13 -0700487 CHECK_FH | RD_STATE, &read->rd_filp))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
489 goto out;
490 }
NeilBrown7e06b7f2005-06-23 22:03:13 -0700491 if (read->rd_filp)
492 get_file(read->rd_filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 status = nfs_ok;
494out:
495 nfs4_unlock_state();
496 read->rd_rqstp = rqstp;
497 read->rd_fhp = current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 return status;
499}
500
501static inline int
502nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
503{
504 u64 cookie = readdir->rd_cookie;
505 static const nfs4_verifier zeroverf;
506
507 /* no need to check permission - this will be done in nfsd_readdir() */
508
509 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
510 return nfserr_inval;
511
512 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
513 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
514
515 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
516 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
517 return nfserr_bad_cookie;
518
519 readdir->rd_rqstp = rqstp;
520 readdir->rd_fhp = current_fh;
521 return nfs_ok;
522}
523
524static inline int
525nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
526{
527 readlink->rl_rqstp = rqstp;
528 readlink->rl_fhp = current_fh;
529 return nfs_ok;
530}
531
532static inline int
533nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
534{
535 int status;
536
NeilBrownc815afc2005-06-23 22:03:00 -0700537 if (nfs4_in_grace())
538 return nfserr_grace;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
540 if (status == nfserr_symlink)
541 return nfserr_notdir;
542 if (!status) {
543 fh_unlock(current_fh);
544 set_change_info(&remove->rm_cinfo, current_fh);
545 }
546 return status;
547}
548
549static inline int
550nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
551 struct svc_fh *save_fh, struct nfsd4_rename *rename)
552{
553 int status = nfserr_nofilehandle;
554
555 if (!save_fh->fh_dentry)
556 return status;
NeilBrownc815afc2005-06-23 22:03:00 -0700557 if (nfs4_in_grace() && !(save_fh->fh_export->ex_flags
558 & NFSEXP_NOSUBTREECHECK))
559 return nfserr_grace;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
561 rename->rn_snamelen, current_fh,
562 rename->rn_tname, rename->rn_tnamelen);
563
564 /* the underlying filesystem returns different error's than required
565 * by NFSv4. both save_fh and current_fh have been verified.. */
566 if (status == nfserr_isdir)
567 status = nfserr_exist;
568 else if ((status == nfserr_notdir) &&
569 (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
570 S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
571 status = nfserr_exist;
572 else if (status == nfserr_symlink)
573 status = nfserr_notdir;
574
575 if (!status) {
576 set_change_info(&rename->rn_sinfo, current_fh);
577 set_change_info(&rename->rn_tinfo, save_fh);
578 }
579 return status;
580}
581
582static inline int
583nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
584{
585 int status = nfs_ok;
586
587 if (!current_fh->fh_dentry)
588 return nfserr_nofilehandle;
589
590 status = nfs_ok;
591 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
592 nfs4_lock_state();
593 if ((status = nfs4_preprocess_stateid_op(current_fh,
594 &setattr->sa_stateid,
595 CHECK_FH | WR_STATE, NULL))) {
596 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
597 goto out_unlock;
598 }
599 nfs4_unlock_state();
600 }
601 status = nfs_ok;
602 if (setattr->sa_acl != NULL)
603 status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
604 if (status)
605 goto out;
606 status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
607 0, (time_t)0);
608out:
609 return status;
610out_unlock:
611 nfs4_unlock_state();
612 return status;
613}
614
615static inline int
616nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
617{
618 stateid_t *stateid = &write->wr_stateid;
619 struct file *filp = NULL;
620 u32 *p;
621 int status = nfs_ok;
622
623 /* no need to check permission - this will be done in nfsd_write() */
624
625 if (write->wr_offset >= OFFSET_MAX)
626 return nfserr_inval;
627
628 nfs4_lock_state();
629 if ((status = nfs4_preprocess_stateid_op(current_fh, stateid,
630 CHECK_FH | WR_STATE, &filp))) {
631 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
632 goto out;
633 }
NeilBrown7e06b7f2005-06-23 22:03:13 -0700634 if (filp)
635 get_file(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 nfs4_unlock_state();
637
638 write->wr_bytes_written = write->wr_buflen;
639 write->wr_how_written = write->wr_stable_how;
640 p = (u32 *)write->wr_verifier.data;
641 *p++ = nfssvc_boot.tv_sec;
642 *p++ = nfssvc_boot.tv_usec;
643
644 status = nfsd_write(rqstp, current_fh, filp, write->wr_offset,
645 write->wr_vec, write->wr_vlen, write->wr_buflen,
646 &write->wr_how_written);
NeilBrown7e06b7f2005-06-23 22:03:13 -0700647 if (filp)
648 fput(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650 if (status == nfserr_symlink)
651 status = nfserr_inval;
652 return status;
653out:
654 nfs4_unlock_state();
655 return status;
656}
657
658/* This routine never returns NFS_OK! If there are no other errors, it
659 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
660 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
661 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
662 */
663static int
664nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
665{
666 u32 *buf, *p;
667 int count;
668 int status;
669
670 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
671 if (status)
672 return status;
673
674 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
675 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
676 return nfserr_attrnotsupp;
677 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
678 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
679 return nfserr_inval;
680 if (verify->ve_attrlen & 3)
681 return nfserr_inval;
682
683 /* count in words:
684 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
685 */
686 count = 4 + (verify->ve_attrlen >> 2);
687 buf = kmalloc(count << 2, GFP_KERNEL);
688 if (!buf)
689 return nfserr_resource;
690
691 status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
692 current_fh->fh_dentry, buf,
693 &count, verify->ve_bmval,
694 rqstp);
695
696 /* this means that nfsd4_encode_fattr() ran out of space */
697 if (status == nfserr_resource && count == 0)
698 status = nfserr_not_same;
699 if (status)
700 goto out_kfree;
701
702 p = buf + 3;
703 status = nfserr_not_same;
704 if (ntohl(*p++) != verify->ve_attrlen)
705 goto out_kfree;
706 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
707 status = nfserr_same;
708
709out_kfree:
710 kfree(buf);
711 return status;
712}
713
714/*
715 * NULL call.
716 */
717static int
718nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
719{
720 return nfs_ok;
721}
722
723
724/*
725 * COMPOUND call.
726 */
727static int
728nfsd4_proc_compound(struct svc_rqst *rqstp,
729 struct nfsd4_compoundargs *args,
730 struct nfsd4_compoundres *resp)
731{
732 struct nfsd4_op *op;
733 struct svc_fh *current_fh = NULL;
734 struct svc_fh *save_fh = NULL;
735 struct nfs4_stateowner *replay_owner = NULL;
736 int slack_space; /* in words, not bytes! */
737 int status;
738
739 status = nfserr_resource;
740 current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
741 if (current_fh == NULL)
742 goto out;
743 fh_init(current_fh, NFS4_FHSIZE);
744 save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
745 if (save_fh == NULL)
746 goto out;
747 fh_init(save_fh, NFS4_FHSIZE);
748
749 resp->xbuf = &rqstp->rq_res;
750 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
751 resp->tagp = resp->p;
752 /* reserve space for: taglen, tag, and opcnt */
753 resp->p += 2 + XDR_QUADLEN(args->taglen);
754 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
755 resp->taglen = args->taglen;
756 resp->tag = args->tag;
757 resp->opcnt = 0;
758 resp->rqstp = rqstp;
759
760 /*
761 * According to RFC3010, this takes precedence over all other errors.
762 */
763 status = nfserr_minor_vers_mismatch;
764 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
765 goto out;
766
767 status = nfs_ok;
768 while (!status && resp->opcnt < args->opcnt) {
769 op = &args->ops[resp->opcnt++];
770
771 /*
772 * The XDR decode routines may have pre-set op->status;
773 * for example, if there is a miscellaneous XDR error
774 * it will be set to nfserr_bad_xdr.
775 */
776 if (op->status)
777 goto encode_op;
778
779 /* We must be able to encode a successful response to
780 * this operation, with enough room left over to encode a
781 * failed response to the next operation. If we don't
782 * have enough room, fail with ERR_RESOURCE.
783 */
784/* FIXME - is slack_space *really* words, or bytes??? - neilb */
785 slack_space = (char *)resp->end - (char *)resp->p;
786 if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
787 BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
788 op->status = nfserr_resource;
789 goto encode_op;
790 }
791
792 /* All operations except RENEW, SETCLIENTID, RESTOREFH
793 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
794 * require a valid current filehandle
795 *
796 * SETATTR NOFILEHANDLE error handled in nfsd4_setattr
797 * due to required returned bitmap argument
798 */
799 if ((!current_fh->fh_dentry) &&
800 !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
801 (op->opnum == OP_SETCLIENTID) ||
802 (op->opnum == OP_SETCLIENTID_CONFIRM) ||
803 (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
804 (op->opnum == OP_RELEASE_LOCKOWNER) ||
805 (op->opnum == OP_SETATTR))) {
806 op->status = nfserr_nofilehandle;
807 goto encode_op;
808 }
809 switch (op->opnum) {
810 case OP_ACCESS:
811 op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
812 break;
813 case OP_CLOSE:
Neil Brownf2327d92005-09-13 01:25:37 -0700814 op->status = nfsd4_close(rqstp, current_fh, &op->u.close, &replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 break;
816 case OP_COMMIT:
817 op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
818 break;
819 case OP_CREATE:
820 op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
821 break;
822 case OP_DELEGRETURN:
823 op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn);
824 break;
825 case OP_GETATTR:
826 op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
827 break;
828 case OP_GETFH:
829 op->status = nfsd4_getfh(current_fh, &op->u.getfh);
830 break;
831 case OP_LINK:
832 op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
833 break;
834 case OP_LOCK:
Neil Brownf2327d92005-09-13 01:25:37 -0700835 op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock, &replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 break;
837 case OP_LOCKT:
838 op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
839 break;
840 case OP_LOCKU:
Neil Brownf2327d92005-09-13 01:25:37 -0700841 op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku, &replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 break;
843 case OP_LOOKUP:
844 op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
845 break;
846 case OP_LOOKUPP:
847 op->status = nfsd4_lookupp(rqstp, current_fh);
848 break;
849 case OP_NVERIFY:
850 op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
851 if (op->status == nfserr_not_same)
852 op->status = nfs_ok;
853 break;
854 case OP_OPEN:
Neil Brownf2327d92005-09-13 01:25:37 -0700855 op->status = nfsd4_open(rqstp, current_fh, &op->u.open, &replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 break;
857 case OP_OPEN_CONFIRM:
Neil Brownf2327d92005-09-13 01:25:37 -0700858 op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm, &replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 break;
860 case OP_OPEN_DOWNGRADE:
Neil Brownf2327d92005-09-13 01:25:37 -0700861 op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade, &replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 break;
863 case OP_PUTFH:
864 op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
865 break;
866 case OP_PUTROOTFH:
867 op->status = nfsd4_putrootfh(rqstp, current_fh);
868 break;
869 case OP_READ:
870 op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
871 break;
872 case OP_READDIR:
873 op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
874 break;
875 case OP_READLINK:
876 op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
877 break;
878 case OP_REMOVE:
879 op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
880 break;
881 case OP_RENAME:
882 op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
883 break;
884 case OP_RENEW:
885 op->status = nfsd4_renew(&op->u.renew);
886 break;
887 case OP_RESTOREFH:
888 op->status = nfsd4_restorefh(current_fh, save_fh);
889 break;
890 case OP_SAVEFH:
891 op->status = nfsd4_savefh(current_fh, save_fh);
892 break;
893 case OP_SETATTR:
894 op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
895 break;
896 case OP_SETCLIENTID:
897 op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
898 break;
899 case OP_SETCLIENTID_CONFIRM:
900 op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
901 break;
902 case OP_VERIFY:
903 op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
904 if (op->status == nfserr_same)
905 op->status = nfs_ok;
906 break;
907 case OP_WRITE:
908 op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
909 break;
910 case OP_RELEASE_LOCKOWNER:
911 op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
912 break;
913 default:
914 BUG_ON(op->status == nfs_ok);
915 break;
916 }
917
918encode_op:
919 if (op->status == NFSERR_REPLAY_ME) {
920 op->replay = &replay_owner->so_replay;
921 nfsd4_encode_replay(resp, op);
922 status = op->status = op->replay->rp_status;
923 } else {
924 nfsd4_encode_operation(resp, op);
925 status = op->status;
926 }
927 if (replay_owner && (replay_owner != (void *)(-1))) {
928 nfs4_put_stateowner(replay_owner);
929 replay_owner = NULL;
930 }
NeilBrown7e06b7f2005-06-23 22:03:13 -0700931 /* XXX Ugh, we need to get rid of this kind of special case: */
932 if (op->opnum == OP_READ && op->u.read.rd_filp)
933 fput(op->u.read.rd_filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 }
935
936out:
937 nfsd4_release_compoundargs(args);
938 if (current_fh)
939 fh_put(current_fh);
940 kfree(current_fh);
941 if (save_fh)
942 fh_put(save_fh);
943 kfree(save_fh);
944 return status;
945}
946
947#define nfs4svc_decode_voidargs NULL
948#define nfs4svc_release_void NULL
949#define nfsd4_voidres nfsd4_voidargs
950#define nfs4svc_release_compound NULL
951struct nfsd4_voidargs { int dummy; };
952
953#define PROC(name, argt, rest, relt, cache, respsize) \
954 { (svc_procfunc) nfsd4_proc_##name, \
955 (kxdrproc_t) nfs4svc_decode_##argt##args, \
956 (kxdrproc_t) nfs4svc_encode_##rest##res, \
957 (kxdrproc_t) nfs4svc_release_##relt, \
958 sizeof(struct nfsd4_##argt##args), \
959 sizeof(struct nfsd4_##rest##res), \
960 0, \
961 cache, \
962 respsize, \
963 }
964
965/*
966 * TODO: At the present time, the NFSv4 server does not do XID caching
967 * of requests. Implementing XID caching would not be a serious problem,
968 * although it would require a mild change in interfaces since one
969 * doesn't know whether an NFSv4 request is idempotent until after the
970 * XDR decode. However, XID caching totally confuses pynfs (Peter
971 * Astrand's regression testsuite for NFSv4 servers), which reuses
972 * XID's liberally, so I've left it unimplemented until pynfs generates
973 * better XID's.
974 */
975static struct svc_procedure nfsd_procedures4[2] = {
976 PROC(null, void, void, void, RC_NOCACHE, 1),
977 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
978};
979
980struct svc_version nfsd_version4 = {
981 .vs_vers = 4,
982 .vs_nproc = 2,
983 .vs_proc = nfsd_procedures4,
984 .vs_dispatch = nfsd_dispatch,
985 .vs_xdrsize = NFS4_SVC_XDRSIZE,
986};
987
988/*
989 * Local variables:
990 * c-basic-offset: 8
991 * End:
992 */