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-rw-r--r--fs/nfsd/nfs4proc.c984
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diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
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1/*
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>
48
49#include <linux/sunrpc/svc.h>
50#include <linux/nfsd/nfsd.h>
51#include <linux/nfsd/cache.h>
52#include <linux/nfs4.h>
53#include <linux/nfsd/state.h>
54#include <linux/nfsd/xdr4.h>
55#include <linux/nfs4_acl.h>
56
57#define NFSDDBG_FACILITY NFSDDBG_PROC
58
59static inline void
60fh_dup2(struct svc_fh *dst, struct svc_fh *src)
61{
62 fh_put(dst);
63 dget(src->fh_dentry);
64 if (src->fh_export)
65 cache_get(&src->fh_export->h);
66 *dst = *src;
67}
68
69static int
70do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
71{
72 int accmode, status;
73
74 if (open->op_truncate &&
75 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
76 return nfserr_inval;
77
78 accmode = MAY_NOP;
79 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
80 accmode = MAY_READ;
81 if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
82 accmode |= (MAY_WRITE | MAY_TRUNC);
83 accmode |= MAY_OWNER_OVERRIDE;
84
85 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
86
87 return status;
88}
89
90static int
91do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
92{
93 struct svc_fh resfh;
94 int status;
95
96 fh_init(&resfh, NFS4_FHSIZE);
97 open->op_truncate = 0;
98
99 if (open->op_create) {
100 /*
101 * Note: create modes (UNCHECKED,GUARDED...) are the same
102 * in NFSv4 as in v3.
103 */
104 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
105 open->op_fname.len, &open->op_iattr,
106 &resfh, open->op_createmode,
107 (u32 *)open->op_verf.data, &open->op_truncate);
108 }
109 else {
110 status = nfsd_lookup(rqstp, current_fh,
111 open->op_fname.data, open->op_fname.len, &resfh);
112 fh_unlock(current_fh);
113 }
114
115 if (!status) {
116 set_change_info(&open->op_cinfo, current_fh);
117
118 /* set reply cache */
119 fh_dup2(current_fh, &resfh);
120 open->op_stateowner->so_replay.rp_openfh_len =
121 resfh.fh_handle.fh_size;
122 memcpy(open->op_stateowner->so_replay.rp_openfh,
123 &resfh.fh_handle.fh_base,
124 resfh.fh_handle.fh_size);
125
126 status = do_open_permission(rqstp, current_fh, open);
127 }
128
129 fh_put(&resfh);
130 return status;
131}
132
133static int
134do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
135{
136 int status;
137
138 /* Only reclaims from previously confirmed clients are valid */
139 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
140 return status;
141
142 /* We don't know the target directory, and therefore can not
143 * set the change info
144 */
145
146 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
147
148 /* set replay cache */
149 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
150 memcpy(open->op_stateowner->so_replay.rp_openfh,
151 &current_fh->fh_handle.fh_base,
152 current_fh->fh_handle.fh_size);
153
154 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
155 (open->op_iattr.ia_size == 0);
156
157 status = do_open_permission(rqstp, current_fh, open);
158
159 return status;
160}
161
162
163static inline int
164nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
165{
166 int status;
167 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
168 (int)open->op_fname.len, open->op_fname.data,
169 open->op_stateowner);
170
171 if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
172 return nfserr_grace;
173
174 if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
175 return nfserr_no_grace;
176
177 /* This check required by spec. */
178 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
179 return nfserr_inval;
180
181 nfs4_lock_state();
182
183 /* check seqid for replay. set nfs4_owner */
184 status = nfsd4_process_open1(open);
185 if (status == NFSERR_REPLAY_ME) {
186 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
187 fh_put(current_fh);
188 current_fh->fh_handle.fh_size = rp->rp_openfh_len;
189 memcpy(&current_fh->fh_handle.fh_base, rp->rp_openfh,
190 rp->rp_openfh_len);
191 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
192 if (status)
193 dprintk("nfsd4_open: replay failed"
194 " restoring previous filehandle\n");
195 else
196 status = NFSERR_REPLAY_ME;
197 }
198 if (status)
199 goto out;
200 switch (open->op_claim_type) {
201 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;
223 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
224 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
225 printk("NFSD: unsupported OPEN claim type %d\n",
226 open->op_claim_type);
227 status = nfserr_notsupp;
228 goto out;
229 default:
230 printk("NFSD: Invalid OPEN claim type %d\n",
231 open->op_claim_type);
232 status = nfserr_inval;
233 goto out;
234 }
235 /*
236 * nfsd4_process_open2() does the actual opening of the file. If
237 * successful, it (1) truncates the file if open->op_truncate was
238 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
239 */
240 status = nfsd4_process_open2(rqstp, current_fh, open);
241out:
242 if (open->op_stateowner)
243 nfs4_get_stateowner(open->op_stateowner);
244 nfs4_unlock_state();
245 return status;
246}
247
248/*
249 * filehandle-manipulating ops.
250 */
251static inline int
252nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
253{
254 if (!current_fh->fh_dentry)
255 return nfserr_nofilehandle;
256
257 *getfh = current_fh;
258 return nfs_ok;
259}
260
261static inline int
262nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
263{
264 fh_put(current_fh);
265 current_fh->fh_handle.fh_size = putfh->pf_fhlen;
266 memcpy(&current_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
267 return fh_verify(rqstp, current_fh, 0, MAY_NOP);
268}
269
270static inline int
271nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
272{
273 int status;
274
275 fh_put(current_fh);
276 status = exp_pseudoroot(rqstp->rq_client, current_fh,
277 &rqstp->rq_chandle);
278 if (!status)
279 status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export));
280 return status;
281}
282
283static inline int
284nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
285{
286 if (!save_fh->fh_dentry)
287 return nfserr_restorefh;
288
289 fh_dup2(current_fh, save_fh);
290 return nfs_ok;
291}
292
293static inline int
294nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
295{
296 if (!current_fh->fh_dentry)
297 return nfserr_nofilehandle;
298
299 fh_dup2(save_fh, current_fh);
300 return nfs_ok;
301}
302
303/*
304 * misc nfsv4 ops
305 */
306static inline int
307nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
308{
309 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
310 return nfserr_inval;
311
312 access->ac_resp_access = access->ac_req_access;
313 return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
314}
315
316static inline int
317nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
318{
319 int status;
320
321 u32 *p = (u32 *)commit->co_verf.data;
322 *p++ = nfssvc_boot.tv_sec;
323 *p++ = nfssvc_boot.tv_usec;
324
325 status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
326 if (status == nfserr_symlink)
327 status = nfserr_inval;
328 return status;
329}
330
331static int
332nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
333{
334 struct svc_fh resfh;
335 int status;
336 dev_t rdev;
337
338 fh_init(&resfh, NFS4_FHSIZE);
339
340 status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
341 if (status == nfserr_symlink)
342 status = nfserr_notdir;
343 if (status)
344 return status;
345
346 switch (create->cr_type) {
347 case NF4LNK:
348 /* ugh! we have to null-terminate the linktext, or
349 * vfs_symlink() will choke. it is always safe to
350 * null-terminate by brute force, since at worst we
351 * will overwrite the first byte of the create namelen
352 * in the XDR buffer, which has already been extracted
353 * during XDR decode.
354 */
355 create->cr_linkname[create->cr_linklen] = 0;
356
357 status = nfsd_symlink(rqstp, current_fh, create->cr_name,
358 create->cr_namelen, create->cr_linkname,
359 create->cr_linklen, &resfh, &create->cr_iattr);
360 break;
361
362 case NF4BLK:
363 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
364 if (MAJOR(rdev) != create->cr_specdata1 ||
365 MINOR(rdev) != create->cr_specdata2)
366 return nfserr_inval;
367 status = nfsd_create(rqstp, current_fh, create->cr_name,
368 create->cr_namelen, &create->cr_iattr,
369 S_IFBLK, rdev, &resfh);
370 break;
371
372 case NF4CHR:
373 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
374 if (MAJOR(rdev) != create->cr_specdata1 ||
375 MINOR(rdev) != create->cr_specdata2)
376 return nfserr_inval;
377 status = nfsd_create(rqstp, current_fh, create->cr_name,
378 create->cr_namelen, &create->cr_iattr,
379 S_IFCHR, rdev, &resfh);
380 break;
381
382 case NF4SOCK:
383 status = nfsd_create(rqstp, current_fh, create->cr_name,
384 create->cr_namelen, &create->cr_iattr,
385 S_IFSOCK, 0, &resfh);
386 break;
387
388 case NF4FIFO:
389 status = nfsd_create(rqstp, current_fh, create->cr_name,
390 create->cr_namelen, &create->cr_iattr,
391 S_IFIFO, 0, &resfh);
392 break;
393
394 case NF4DIR:
395 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
396 status = nfsd_create(rqstp, current_fh, create->cr_name,
397 create->cr_namelen, &create->cr_iattr,
398 S_IFDIR, 0, &resfh);
399 break;
400
401 default:
402 status = nfserr_badtype;
403 }
404
405 if (!status) {
406 fh_unlock(current_fh);
407 set_change_info(&create->cr_cinfo, current_fh);
408 fh_dup2(current_fh, &resfh);
409 }
410
411 fh_put(&resfh);
412 return status;
413}
414
415static inline int
416nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
417{
418 int status;
419
420 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
421 if (status)
422 return status;
423
424 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
425 return nfserr_inval;
426
427 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
428 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
429
430 getattr->ga_fhp = current_fh;
431 return nfs_ok;
432}
433
434static inline int
435nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
436 struct svc_fh *save_fh, struct nfsd4_link *link)
437{
438 int status = nfserr_nofilehandle;
439
440 if (!save_fh->fh_dentry)
441 return status;
442 status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
443 if (!status)
444 set_change_info(&link->li_cinfo, current_fh);
445 return status;
446}
447
448static int
449nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
450{
451 struct svc_fh tmp_fh;
452 int ret;
453
454 fh_init(&tmp_fh, NFS4_FHSIZE);
455 if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
456 &rqstp->rq_chandle)) != 0)
457 return ret;
458 if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
459 fh_put(&tmp_fh);
460 return nfserr_noent;
461 }
462 fh_put(&tmp_fh);
463 return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
464}
465
466static inline int
467nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
468{
469 return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
470}
471
472static inline int
473nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
474{
475 int status;
476 struct file *filp = NULL;
477
478 /* no need to check permission - this will be done in nfsd_read() */
479
480 if (read->rd_offset >= OFFSET_MAX)
481 return nfserr_inval;
482
483 nfs4_lock_state();
484 /* check stateid */
485 if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
486 CHECK_FH | RD_STATE, &filp))) {
487 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
488 goto out;
489 }
490 status = nfs_ok;
491out:
492 nfs4_unlock_state();
493 read->rd_rqstp = rqstp;
494 read->rd_fhp = current_fh;
495 read->rd_filp = filp;
496 return status;
497}
498
499static inline int
500nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
501{
502 u64 cookie = readdir->rd_cookie;
503 static const nfs4_verifier zeroverf;
504
505 /* no need to check permission - this will be done in nfsd_readdir() */
506
507 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
508 return nfserr_inval;
509
510 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
511 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
512
513 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
514 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
515 return nfserr_bad_cookie;
516
517 readdir->rd_rqstp = rqstp;
518 readdir->rd_fhp = current_fh;
519 return nfs_ok;
520}
521
522static inline int
523nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
524{
525 readlink->rl_rqstp = rqstp;
526 readlink->rl_fhp = current_fh;
527 return nfs_ok;
528}
529
530static inline int
531nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
532{
533 int status;
534
535 status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
536 if (status == nfserr_symlink)
537 return nfserr_notdir;
538 if (!status) {
539 fh_unlock(current_fh);
540 set_change_info(&remove->rm_cinfo, current_fh);
541 }
542 return status;
543}
544
545static inline int
546nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
547 struct svc_fh *save_fh, struct nfsd4_rename *rename)
548{
549 int status = nfserr_nofilehandle;
550
551 if (!save_fh->fh_dentry)
552 return status;
553 status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
554 rename->rn_snamelen, current_fh,
555 rename->rn_tname, rename->rn_tnamelen);
556
557 /* the underlying filesystem returns different error's than required
558 * by NFSv4. both save_fh and current_fh have been verified.. */
559 if (status == nfserr_isdir)
560 status = nfserr_exist;
561 else if ((status == nfserr_notdir) &&
562 (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
563 S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
564 status = nfserr_exist;
565 else if (status == nfserr_symlink)
566 status = nfserr_notdir;
567
568 if (!status) {
569 set_change_info(&rename->rn_sinfo, current_fh);
570 set_change_info(&rename->rn_tinfo, save_fh);
571 }
572 return status;
573}
574
575static inline int
576nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
577{
578 int status = nfs_ok;
579
580 if (!current_fh->fh_dentry)
581 return nfserr_nofilehandle;
582
583 status = nfs_ok;
584 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
585 nfs4_lock_state();
586 if ((status = nfs4_preprocess_stateid_op(current_fh,
587 &setattr->sa_stateid,
588 CHECK_FH | WR_STATE, NULL))) {
589 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
590 goto out_unlock;
591 }
592 nfs4_unlock_state();
593 }
594 status = nfs_ok;
595 if (setattr->sa_acl != NULL)
596 status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
597 if (status)
598 goto out;
599 status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
600 0, (time_t)0);
601out:
602 return status;
603out_unlock:
604 nfs4_unlock_state();
605 return status;
606}
607
608static inline int
609nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
610{
611 stateid_t *stateid = &write->wr_stateid;
612 struct file *filp = NULL;
613 u32 *p;
614 int status = nfs_ok;
615
616 /* no need to check permission - this will be done in nfsd_write() */
617
618 if (write->wr_offset >= OFFSET_MAX)
619 return nfserr_inval;
620
621 nfs4_lock_state();
622 if ((status = nfs4_preprocess_stateid_op(current_fh, stateid,
623 CHECK_FH | WR_STATE, &filp))) {
624 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
625 goto out;
626 }
627 nfs4_unlock_state();
628
629 write->wr_bytes_written = write->wr_buflen;
630 write->wr_how_written = write->wr_stable_how;
631 p = (u32 *)write->wr_verifier.data;
632 *p++ = nfssvc_boot.tv_sec;
633 *p++ = nfssvc_boot.tv_usec;
634
635 status = nfsd_write(rqstp, current_fh, filp, write->wr_offset,
636 write->wr_vec, write->wr_vlen, write->wr_buflen,
637 &write->wr_how_written);
638
639 if (status == nfserr_symlink)
640 status = nfserr_inval;
641 return status;
642out:
643 nfs4_unlock_state();
644 return status;
645}
646
647/* This routine never returns NFS_OK! If there are no other errors, it
648 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
649 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
650 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
651 */
652static int
653nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
654{
655 u32 *buf, *p;
656 int count;
657 int status;
658
659 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
660 if (status)
661 return status;
662
663 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
664 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
665 return nfserr_attrnotsupp;
666 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
667 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
668 return nfserr_inval;
669 if (verify->ve_attrlen & 3)
670 return nfserr_inval;
671
672 /* count in words:
673 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
674 */
675 count = 4 + (verify->ve_attrlen >> 2);
676 buf = kmalloc(count << 2, GFP_KERNEL);
677 if (!buf)
678 return nfserr_resource;
679
680 status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
681 current_fh->fh_dentry, buf,
682 &count, verify->ve_bmval,
683 rqstp);
684
685 /* this means that nfsd4_encode_fattr() ran out of space */
686 if (status == nfserr_resource && count == 0)
687 status = nfserr_not_same;
688 if (status)
689 goto out_kfree;
690
691 p = buf + 3;
692 status = nfserr_not_same;
693 if (ntohl(*p++) != verify->ve_attrlen)
694 goto out_kfree;
695 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
696 status = nfserr_same;
697
698out_kfree:
699 kfree(buf);
700 return status;
701}
702
703/*
704 * NULL call.
705 */
706static int
707nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
708{
709 return nfs_ok;
710}
711
712
713/*
714 * COMPOUND call.
715 */
716static int
717nfsd4_proc_compound(struct svc_rqst *rqstp,
718 struct nfsd4_compoundargs *args,
719 struct nfsd4_compoundres *resp)
720{
721 struct nfsd4_op *op;
722 struct svc_fh *current_fh = NULL;
723 struct svc_fh *save_fh = NULL;
724 struct nfs4_stateowner *replay_owner = NULL;
725 int slack_space; /* in words, not bytes! */
726 int status;
727
728 status = nfserr_resource;
729 current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
730 if (current_fh == NULL)
731 goto out;
732 fh_init(current_fh, NFS4_FHSIZE);
733 save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
734 if (save_fh == NULL)
735 goto out;
736 fh_init(save_fh, NFS4_FHSIZE);
737
738 resp->xbuf = &rqstp->rq_res;
739 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
740 resp->tagp = resp->p;
741 /* reserve space for: taglen, tag, and opcnt */
742 resp->p += 2 + XDR_QUADLEN(args->taglen);
743 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
744 resp->taglen = args->taglen;
745 resp->tag = args->tag;
746 resp->opcnt = 0;
747 resp->rqstp = rqstp;
748
749 /*
750 * According to RFC3010, this takes precedence over all other errors.
751 */
752 status = nfserr_minor_vers_mismatch;
753 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
754 goto out;
755
756 status = nfs_ok;
757 while (!status && resp->opcnt < args->opcnt) {
758 op = &args->ops[resp->opcnt++];
759
760 /*
761 * The XDR decode routines may have pre-set op->status;
762 * for example, if there is a miscellaneous XDR error
763 * it will be set to nfserr_bad_xdr.
764 */
765 if (op->status)
766 goto encode_op;
767
768 /* We must be able to encode a successful response to
769 * this operation, with enough room left over to encode a
770 * failed response to the next operation. If we don't
771 * have enough room, fail with ERR_RESOURCE.
772 */
773/* FIXME - is slack_space *really* words, or bytes??? - neilb */
774 slack_space = (char *)resp->end - (char *)resp->p;
775 if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
776 BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
777 op->status = nfserr_resource;
778 goto encode_op;
779 }
780
781 /* All operations except RENEW, SETCLIENTID, RESTOREFH
782 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
783 * require a valid current filehandle
784 *
785 * SETATTR NOFILEHANDLE error handled in nfsd4_setattr
786 * due to required returned bitmap argument
787 */
788 if ((!current_fh->fh_dentry) &&
789 !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
790 (op->opnum == OP_SETCLIENTID) ||
791 (op->opnum == OP_SETCLIENTID_CONFIRM) ||
792 (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
793 (op->opnum == OP_RELEASE_LOCKOWNER) ||
794 (op->opnum == OP_SETATTR))) {
795 op->status = nfserr_nofilehandle;
796 goto encode_op;
797 }
798 switch (op->opnum) {
799 case OP_ACCESS:
800 op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
801 break;
802 case OP_CLOSE:
803 op->status = nfsd4_close(rqstp, current_fh, &op->u.close);
804 replay_owner = op->u.close.cl_stateowner;
805 break;
806 case OP_COMMIT:
807 op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
808 break;
809 case OP_CREATE:
810 op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
811 break;
812 case OP_DELEGRETURN:
813 op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn);
814 break;
815 case OP_GETATTR:
816 op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
817 break;
818 case OP_GETFH:
819 op->status = nfsd4_getfh(current_fh, &op->u.getfh);
820 break;
821 case OP_LINK:
822 op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
823 break;
824 case OP_LOCK:
825 op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock);
826 replay_owner = op->u.lock.lk_stateowner;
827 break;
828 case OP_LOCKT:
829 op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
830 break;
831 case OP_LOCKU:
832 op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku);
833 replay_owner = op->u.locku.lu_stateowner;
834 break;
835 case OP_LOOKUP:
836 op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
837 break;
838 case OP_LOOKUPP:
839 op->status = nfsd4_lookupp(rqstp, current_fh);
840 break;
841 case OP_NVERIFY:
842 op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
843 if (op->status == nfserr_not_same)
844 op->status = nfs_ok;
845 break;
846 case OP_OPEN:
847 op->status = nfsd4_open(rqstp, current_fh, &op->u.open);
848 replay_owner = op->u.open.op_stateowner;
849 break;
850 case OP_OPEN_CONFIRM:
851 op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm);
852 replay_owner = op->u.open_confirm.oc_stateowner;
853 break;
854 case OP_OPEN_DOWNGRADE:
855 op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade);
856 replay_owner = op->u.open_downgrade.od_stateowner;
857 break;
858 case OP_PUTFH:
859 op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
860 break;
861 case OP_PUTROOTFH:
862 op->status = nfsd4_putrootfh(rqstp, current_fh);
863 break;
864 case OP_READ:
865 op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
866 break;
867 case OP_READDIR:
868 op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
869 break;
870 case OP_READLINK:
871 op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
872 break;
873 case OP_REMOVE:
874 op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
875 break;
876 case OP_RENAME:
877 op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
878 break;
879 case OP_RENEW:
880 op->status = nfsd4_renew(&op->u.renew);
881 break;
882 case OP_RESTOREFH:
883 op->status = nfsd4_restorefh(current_fh, save_fh);
884 break;
885 case OP_SAVEFH:
886 op->status = nfsd4_savefh(current_fh, save_fh);
887 break;
888 case OP_SETATTR:
889 op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
890 break;
891 case OP_SETCLIENTID:
892 op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
893 break;
894 case OP_SETCLIENTID_CONFIRM:
895 op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
896 break;
897 case OP_VERIFY:
898 op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
899 if (op->status == nfserr_same)
900 op->status = nfs_ok;
901 break;
902 case OP_WRITE:
903 op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
904 break;
905 case OP_RELEASE_LOCKOWNER:
906 op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
907 break;
908 default:
909 BUG_ON(op->status == nfs_ok);
910 break;
911 }
912
913encode_op:
914 if (op->status == NFSERR_REPLAY_ME) {
915 op->replay = &replay_owner->so_replay;
916 nfsd4_encode_replay(resp, op);
917 status = op->status = op->replay->rp_status;
918 } else {
919 nfsd4_encode_operation(resp, op);
920 status = op->status;
921 }
922 if (replay_owner && (replay_owner != (void *)(-1))) {
923 nfs4_put_stateowner(replay_owner);
924 replay_owner = NULL;
925 }
926 }
927
928out:
929 nfsd4_release_compoundargs(args);
930 if (current_fh)
931 fh_put(current_fh);
932 kfree(current_fh);
933 if (save_fh)
934 fh_put(save_fh);
935 kfree(save_fh);
936 return status;
937}
938
939#define nfs4svc_decode_voidargs NULL
940#define nfs4svc_release_void NULL
941#define nfsd4_voidres nfsd4_voidargs
942#define nfs4svc_release_compound NULL
943struct nfsd4_voidargs { int dummy; };
944
945#define PROC(name, argt, rest, relt, cache, respsize) \
946 { (svc_procfunc) nfsd4_proc_##name, \
947 (kxdrproc_t) nfs4svc_decode_##argt##args, \
948 (kxdrproc_t) nfs4svc_encode_##rest##res, \
949 (kxdrproc_t) nfs4svc_release_##relt, \
950 sizeof(struct nfsd4_##argt##args), \
951 sizeof(struct nfsd4_##rest##res), \
952 0, \
953 cache, \
954 respsize, \
955 }
956
957/*
958 * TODO: At the present time, the NFSv4 server does not do XID caching
959 * of requests. Implementing XID caching would not be a serious problem,
960 * although it would require a mild change in interfaces since one
961 * doesn't know whether an NFSv4 request is idempotent until after the
962 * XDR decode. However, XID caching totally confuses pynfs (Peter
963 * Astrand's regression testsuite for NFSv4 servers), which reuses
964 * XID's liberally, so I've left it unimplemented until pynfs generates
965 * better XID's.
966 */
967static struct svc_procedure nfsd_procedures4[2] = {
968 PROC(null, void, void, void, RC_NOCACHE, 1),
969 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
970};
971
972struct svc_version nfsd_version4 = {
973 .vs_vers = 4,
974 .vs_nproc = 2,
975 .vs_proc = nfsd_procedures4,
976 .vs_dispatch = nfsd_dispatch,
977 .vs_xdrsize = NFS4_SVC_XDRSIZE,
978};
979
980/*
981 * Local variables:
982 * c-basic-offset: 8
983 * End:
984 */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 05:36:55 -0500