Commit | Line | Data |
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1da177e4 LT |
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 | ||
59 | static inline void | |
60 | fh_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 | ||
69 | static int | |
70 | do_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 | ||
90 | static int | |
91 | do_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 | ||
133 | static int | |
134 | do_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 | ¤t_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 | ||
163 | static inline int | |
164 | nfsd4_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(¤t_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) { | |
0dd3c192 N |
201 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
202 | status = nfserr_inval; | |
203 | if (open->op_create) | |
204 | goto out; | |
205 | /* fall through */ | |
1da177e4 LT |
206 | case NFS4_OPEN_CLAIM_NULL: |
207 | /* | |
208 | * (1) set CURRENT_FH to the file being opened, | |
209 | * creating it if necessary, (2) set open->op_cinfo, | |
210 | * (3) set open->op_truncate if the file is to be | |
211 | * truncated after opening, (4) do permission checking. | |
212 | */ | |
213 | status = do_open_lookup(rqstp, current_fh, open); | |
214 | if (status) | |
215 | goto out; | |
216 | break; | |
217 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
218 | /* | |
219 | * The CURRENT_FH is already set to the file being | |
220 | * opened. (1) set open->op_cinfo, (2) set | |
221 | * open->op_truncate if the file is to be truncated | |
222 | * after opening, (3) do permission checking. | |
223 | */ | |
224 | status = do_open_fhandle(rqstp, current_fh, open); | |
225 | if (status) | |
226 | goto out; | |
227 | break; | |
1da177e4 LT |
228 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
229 | printk("NFSD: unsupported OPEN claim type %d\n", | |
230 | open->op_claim_type); | |
231 | status = nfserr_notsupp; | |
232 | goto out; | |
233 | default: | |
234 | printk("NFSD: Invalid OPEN claim type %d\n", | |
235 | open->op_claim_type); | |
236 | status = nfserr_inval; | |
237 | goto out; | |
238 | } | |
239 | /* | |
240 | * nfsd4_process_open2() does the actual opening of the file. If | |
241 | * successful, it (1) truncates the file if open->op_truncate was | |
242 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. | |
243 | */ | |
244 | status = nfsd4_process_open2(rqstp, current_fh, open); | |
245 | out: | |
246 | if (open->op_stateowner) | |
247 | nfs4_get_stateowner(open->op_stateowner); | |
248 | nfs4_unlock_state(); | |
249 | return status; | |
250 | } | |
251 | ||
252 | /* | |
253 | * filehandle-manipulating ops. | |
254 | */ | |
255 | static inline int | |
256 | nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh) | |
257 | { | |
258 | if (!current_fh->fh_dentry) | |
259 | return nfserr_nofilehandle; | |
260 | ||
261 | *getfh = current_fh; | |
262 | return nfs_ok; | |
263 | } | |
264 | ||
265 | static inline int | |
266 | nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh) | |
267 | { | |
268 | fh_put(current_fh); | |
269 | current_fh->fh_handle.fh_size = putfh->pf_fhlen; | |
270 | memcpy(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen); | |
271 | return fh_verify(rqstp, current_fh, 0, MAY_NOP); | |
272 | } | |
273 | ||
274 | static inline int | |
275 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh) | |
276 | { | |
277 | int status; | |
278 | ||
279 | fh_put(current_fh); | |
280 | status = exp_pseudoroot(rqstp->rq_client, current_fh, | |
281 | &rqstp->rq_chandle); | |
282 | if (!status) | |
283 | status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export)); | |
284 | return status; | |
285 | } | |
286 | ||
287 | static inline int | |
288 | nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh) | |
289 | { | |
290 | if (!save_fh->fh_dentry) | |
291 | return nfserr_restorefh; | |
292 | ||
293 | fh_dup2(current_fh, save_fh); | |
294 | return nfs_ok; | |
295 | } | |
296 | ||
297 | static inline int | |
298 | nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh) | |
299 | { | |
300 | if (!current_fh->fh_dentry) | |
301 | return nfserr_nofilehandle; | |
302 | ||
303 | fh_dup2(save_fh, current_fh); | |
304 | return nfs_ok; | |
305 | } | |
306 | ||
307 | /* | |
308 | * misc nfsv4 ops | |
309 | */ | |
310 | static inline int | |
311 | nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access) | |
312 | { | |
313 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) | |
314 | return nfserr_inval; | |
315 | ||
316 | access->ac_resp_access = access->ac_req_access; | |
317 | return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported); | |
318 | } | |
319 | ||
320 | static inline int | |
321 | nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit) | |
322 | { | |
323 | int status; | |
324 | ||
325 | u32 *p = (u32 *)commit->co_verf.data; | |
326 | *p++ = nfssvc_boot.tv_sec; | |
327 | *p++ = nfssvc_boot.tv_usec; | |
328 | ||
329 | status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count); | |
330 | if (status == nfserr_symlink) | |
331 | status = nfserr_inval; | |
332 | return status; | |
333 | } | |
334 | ||
335 | static int | |
336 | nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create) | |
337 | { | |
338 | struct svc_fh resfh; | |
339 | int status; | |
340 | dev_t rdev; | |
341 | ||
342 | fh_init(&resfh, NFS4_FHSIZE); | |
343 | ||
344 | status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE); | |
345 | if (status == nfserr_symlink) | |
346 | status = nfserr_notdir; | |
347 | if (status) | |
348 | return status; | |
349 | ||
350 | switch (create->cr_type) { | |
351 | case NF4LNK: | |
352 | /* ugh! we have to null-terminate the linktext, or | |
353 | * vfs_symlink() will choke. it is always safe to | |
354 | * null-terminate by brute force, since at worst we | |
355 | * will overwrite the first byte of the create namelen | |
356 | * in the XDR buffer, which has already been extracted | |
357 | * during XDR decode. | |
358 | */ | |
359 | create->cr_linkname[create->cr_linklen] = 0; | |
360 | ||
361 | status = nfsd_symlink(rqstp, current_fh, create->cr_name, | |
362 | create->cr_namelen, create->cr_linkname, | |
363 | create->cr_linklen, &resfh, &create->cr_iattr); | |
364 | break; | |
365 | ||
366 | case NF4BLK: | |
367 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
368 | if (MAJOR(rdev) != create->cr_specdata1 || | |
369 | MINOR(rdev) != create->cr_specdata2) | |
370 | return nfserr_inval; | |
371 | status = nfsd_create(rqstp, current_fh, create->cr_name, | |
372 | create->cr_namelen, &create->cr_iattr, | |
373 | S_IFBLK, rdev, &resfh); | |
374 | break; | |
375 | ||
376 | case NF4CHR: | |
377 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
378 | if (MAJOR(rdev) != create->cr_specdata1 || | |
379 | MINOR(rdev) != create->cr_specdata2) | |
380 | return nfserr_inval; | |
381 | status = nfsd_create(rqstp, current_fh, create->cr_name, | |
382 | create->cr_namelen, &create->cr_iattr, | |
383 | S_IFCHR, rdev, &resfh); | |
384 | break; | |
385 | ||
386 | case NF4SOCK: | |
387 | status = nfsd_create(rqstp, current_fh, create->cr_name, | |
388 | create->cr_namelen, &create->cr_iattr, | |
389 | S_IFSOCK, 0, &resfh); | |
390 | break; | |
391 | ||
392 | case NF4FIFO: | |
393 | status = nfsd_create(rqstp, current_fh, create->cr_name, | |
394 | create->cr_namelen, &create->cr_iattr, | |
395 | S_IFIFO, 0, &resfh); | |
396 | break; | |
397 | ||
398 | case NF4DIR: | |
399 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; | |
400 | status = nfsd_create(rqstp, current_fh, create->cr_name, | |
401 | create->cr_namelen, &create->cr_iattr, | |
402 | S_IFDIR, 0, &resfh); | |
403 | break; | |
404 | ||
405 | default: | |
406 | status = nfserr_badtype; | |
407 | } | |
408 | ||
409 | if (!status) { | |
410 | fh_unlock(current_fh); | |
411 | set_change_info(&create->cr_cinfo, current_fh); | |
412 | fh_dup2(current_fh, &resfh); | |
413 | } | |
414 | ||
415 | fh_put(&resfh); | |
416 | return status; | |
417 | } | |
418 | ||
419 | static inline int | |
420 | nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr) | |
421 | { | |
422 | int status; | |
423 | ||
424 | status = fh_verify(rqstp, current_fh, 0, MAY_NOP); | |
425 | if (status) | |
426 | return status; | |
427 | ||
428 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
429 | return nfserr_inval; | |
430 | ||
431 | getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; | |
432 | getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; | |
433 | ||
434 | getattr->ga_fhp = current_fh; | |
435 | return nfs_ok; | |
436 | } | |
437 | ||
438 | static inline int | |
439 | nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh, | |
440 | struct svc_fh *save_fh, struct nfsd4_link *link) | |
441 | { | |
442 | int status = nfserr_nofilehandle; | |
443 | ||
444 | if (!save_fh->fh_dentry) | |
445 | return status; | |
446 | status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh); | |
447 | if (!status) | |
448 | set_change_info(&link->li_cinfo, current_fh); | |
449 | return status; | |
450 | } | |
451 | ||
452 | static int | |
453 | nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh) | |
454 | { | |
455 | struct svc_fh tmp_fh; | |
456 | int ret; | |
457 | ||
458 | fh_init(&tmp_fh, NFS4_FHSIZE); | |
459 | if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh, | |
460 | &rqstp->rq_chandle)) != 0) | |
461 | return ret; | |
462 | if (tmp_fh.fh_dentry == current_fh->fh_dentry) { | |
463 | fh_put(&tmp_fh); | |
464 | return nfserr_noent; | |
465 | } | |
466 | fh_put(&tmp_fh); | |
467 | return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh); | |
468 | } | |
469 | ||
470 | static inline int | |
471 | nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup) | |
472 | { | |
473 | return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh); | |
474 | } | |
475 | ||
476 | static inline int | |
477 | nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read) | |
478 | { | |
479 | int status; | |
480 | struct file *filp = NULL; | |
481 | ||
482 | /* no need to check permission - this will be done in nfsd_read() */ | |
483 | ||
484 | if (read->rd_offset >= OFFSET_MAX) | |
485 | return nfserr_inval; | |
486 | ||
487 | nfs4_lock_state(); | |
488 | /* check stateid */ | |
489 | if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid, | |
490 | CHECK_FH | RD_STATE, &filp))) { | |
491 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); | |
492 | goto out; | |
493 | } | |
494 | status = nfs_ok; | |
495 | out: | |
496 | nfs4_unlock_state(); | |
497 | read->rd_rqstp = rqstp; | |
498 | read->rd_fhp = current_fh; | |
499 | read->rd_filp = filp; | |
500 | return status; | |
501 | } | |
502 | ||
503 | static inline int | |
504 | nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir) | |
505 | { | |
506 | u64 cookie = readdir->rd_cookie; | |
507 | static const nfs4_verifier zeroverf; | |
508 | ||
509 | /* no need to check permission - this will be done in nfsd_readdir() */ | |
510 | ||
511 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
512 | return nfserr_inval; | |
513 | ||
514 | readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; | |
515 | readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; | |
516 | ||
517 | if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || | |
518 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) | |
519 | return nfserr_bad_cookie; | |
520 | ||
521 | readdir->rd_rqstp = rqstp; | |
522 | readdir->rd_fhp = current_fh; | |
523 | return nfs_ok; | |
524 | } | |
525 | ||
526 | static inline int | |
527 | nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink) | |
528 | { | |
529 | readlink->rl_rqstp = rqstp; | |
530 | readlink->rl_fhp = current_fh; | |
531 | return nfs_ok; | |
532 | } | |
533 | ||
534 | static inline int | |
535 | nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove) | |
536 | { | |
537 | int status; | |
538 | ||
c815afc7 N |
539 | if (nfs4_in_grace()) |
540 | return nfserr_grace; | |
1da177e4 LT |
541 | status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen); |
542 | if (status == nfserr_symlink) | |
543 | return nfserr_notdir; | |
544 | if (!status) { | |
545 | fh_unlock(current_fh); | |
546 | set_change_info(&remove->rm_cinfo, current_fh); | |
547 | } | |
548 | return status; | |
549 | } | |
550 | ||
551 | static inline int | |
552 | nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh, | |
553 | struct svc_fh *save_fh, struct nfsd4_rename *rename) | |
554 | { | |
555 | int status = nfserr_nofilehandle; | |
556 | ||
557 | if (!save_fh->fh_dentry) | |
558 | return status; | |
c815afc7 N |
559 | if (nfs4_in_grace() && !(save_fh->fh_export->ex_flags |
560 | & NFSEXP_NOSUBTREECHECK)) | |
561 | return nfserr_grace; | |
1da177e4 LT |
562 | status = nfsd_rename(rqstp, save_fh, rename->rn_sname, |
563 | rename->rn_snamelen, current_fh, | |
564 | rename->rn_tname, rename->rn_tnamelen); | |
565 | ||
566 | /* the underlying filesystem returns different error's than required | |
567 | * by NFSv4. both save_fh and current_fh have been verified.. */ | |
568 | if (status == nfserr_isdir) | |
569 | status = nfserr_exist; | |
570 | else if ((status == nfserr_notdir) && | |
571 | (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) && | |
572 | S_ISDIR(current_fh->fh_dentry->d_inode->i_mode))) | |
573 | status = nfserr_exist; | |
574 | else if (status == nfserr_symlink) | |
575 | status = nfserr_notdir; | |
576 | ||
577 | if (!status) { | |
578 | set_change_info(&rename->rn_sinfo, current_fh); | |
579 | set_change_info(&rename->rn_tinfo, save_fh); | |
580 | } | |
581 | return status; | |
582 | } | |
583 | ||
584 | static inline int | |
585 | nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr) | |
586 | { | |
587 | int status = nfs_ok; | |
588 | ||
589 | if (!current_fh->fh_dentry) | |
590 | return nfserr_nofilehandle; | |
591 | ||
592 | status = nfs_ok; | |
593 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { | |
594 | nfs4_lock_state(); | |
595 | if ((status = nfs4_preprocess_stateid_op(current_fh, | |
596 | &setattr->sa_stateid, | |
597 | CHECK_FH | WR_STATE, NULL))) { | |
598 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); | |
599 | goto out_unlock; | |
600 | } | |
601 | nfs4_unlock_state(); | |
602 | } | |
603 | status = nfs_ok; | |
604 | if (setattr->sa_acl != NULL) | |
605 | status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl); | |
606 | if (status) | |
607 | goto out; | |
608 | status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr, | |
609 | 0, (time_t)0); | |
610 | out: | |
611 | return status; | |
612 | out_unlock: | |
613 | nfs4_unlock_state(); | |
614 | return status; | |
615 | } | |
616 | ||
617 | static inline int | |
618 | nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write) | |
619 | { | |
620 | stateid_t *stateid = &write->wr_stateid; | |
621 | struct file *filp = NULL; | |
622 | u32 *p; | |
623 | int status = nfs_ok; | |
624 | ||
625 | /* no need to check permission - this will be done in nfsd_write() */ | |
626 | ||
627 | if (write->wr_offset >= OFFSET_MAX) | |
628 | return nfserr_inval; | |
629 | ||
630 | nfs4_lock_state(); | |
631 | if ((status = nfs4_preprocess_stateid_op(current_fh, stateid, | |
632 | CHECK_FH | WR_STATE, &filp))) { | |
633 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); | |
634 | goto out; | |
635 | } | |
636 | 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); | |
647 | ||
648 | if (status == nfserr_symlink) | |
649 | status = nfserr_inval; | |
650 | return status; | |
651 | out: | |
652 | nfs4_unlock_state(); | |
653 | return status; | |
654 | } | |
655 | ||
656 | /* This routine never returns NFS_OK! If there are no other errors, it | |
657 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the | |
658 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME | |
659 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. | |
660 | */ | |
661 | static int | |
662 | nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify) | |
663 | { | |
664 | u32 *buf, *p; | |
665 | int count; | |
666 | int status; | |
667 | ||
668 | status = fh_verify(rqstp, current_fh, 0, MAY_NOP); | |
669 | if (status) | |
670 | return status; | |
671 | ||
672 | if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) | |
673 | || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) | |
674 | return nfserr_attrnotsupp; | |
675 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) | |
676 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) | |
677 | return nfserr_inval; | |
678 | if (verify->ve_attrlen & 3) | |
679 | return nfserr_inval; | |
680 | ||
681 | /* count in words: | |
682 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 | |
683 | */ | |
684 | count = 4 + (verify->ve_attrlen >> 2); | |
685 | buf = kmalloc(count << 2, GFP_KERNEL); | |
686 | if (!buf) | |
687 | return nfserr_resource; | |
688 | ||
689 | status = nfsd4_encode_fattr(current_fh, current_fh->fh_export, | |
690 | current_fh->fh_dentry, buf, | |
691 | &count, verify->ve_bmval, | |
692 | rqstp); | |
693 | ||
694 | /* this means that nfsd4_encode_fattr() ran out of space */ | |
695 | if (status == nfserr_resource && count == 0) | |
696 | status = nfserr_not_same; | |
697 | if (status) | |
698 | goto out_kfree; | |
699 | ||
700 | p = buf + 3; | |
701 | status = nfserr_not_same; | |
702 | if (ntohl(*p++) != verify->ve_attrlen) | |
703 | goto out_kfree; | |
704 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) | |
705 | status = nfserr_same; | |
706 | ||
707 | out_kfree: | |
708 | kfree(buf); | |
709 | return status; | |
710 | } | |
711 | ||
712 | /* | |
713 | * NULL call. | |
714 | */ | |
715 | static int | |
716 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) | |
717 | { | |
718 | return nfs_ok; | |
719 | } | |
720 | ||
721 | ||
722 | /* | |
723 | * COMPOUND call. | |
724 | */ | |
725 | static int | |
726 | nfsd4_proc_compound(struct svc_rqst *rqstp, | |
727 | struct nfsd4_compoundargs *args, | |
728 | struct nfsd4_compoundres *resp) | |
729 | { | |
730 | struct nfsd4_op *op; | |
731 | struct svc_fh *current_fh = NULL; | |
732 | struct svc_fh *save_fh = NULL; | |
733 | struct nfs4_stateowner *replay_owner = NULL; | |
734 | int slack_space; /* in words, not bytes! */ | |
735 | int status; | |
736 | ||
737 | status = nfserr_resource; | |
738 | current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL); | |
739 | if (current_fh == NULL) | |
740 | goto out; | |
741 | fh_init(current_fh, NFS4_FHSIZE); | |
742 | save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL); | |
743 | if (save_fh == NULL) | |
744 | goto out; | |
745 | fh_init(save_fh, NFS4_FHSIZE); | |
746 | ||
747 | resp->xbuf = &rqstp->rq_res; | |
748 | resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len; | |
749 | resp->tagp = resp->p; | |
750 | /* reserve space for: taglen, tag, and opcnt */ | |
751 | resp->p += 2 + XDR_QUADLEN(args->taglen); | |
752 | resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; | |
753 | resp->taglen = args->taglen; | |
754 | resp->tag = args->tag; | |
755 | resp->opcnt = 0; | |
756 | resp->rqstp = rqstp; | |
757 | ||
758 | /* | |
759 | * According to RFC3010, this takes precedence over all other errors. | |
760 | */ | |
761 | status = nfserr_minor_vers_mismatch; | |
762 | if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION) | |
763 | goto out; | |
764 | ||
765 | status = nfs_ok; | |
766 | while (!status && resp->opcnt < args->opcnt) { | |
767 | op = &args->ops[resp->opcnt++]; | |
768 | ||
769 | /* | |
770 | * The XDR decode routines may have pre-set op->status; | |
771 | * for example, if there is a miscellaneous XDR error | |
772 | * it will be set to nfserr_bad_xdr. | |
773 | */ | |
774 | if (op->status) | |
775 | goto encode_op; | |
776 | ||
777 | /* We must be able to encode a successful response to | |
778 | * this operation, with enough room left over to encode a | |
779 | * failed response to the next operation. If we don't | |
780 | * have enough room, fail with ERR_RESOURCE. | |
781 | */ | |
782 | /* FIXME - is slack_space *really* words, or bytes??? - neilb */ | |
783 | slack_space = (char *)resp->end - (char *)resp->p; | |
784 | if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) { | |
785 | BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE); | |
786 | op->status = nfserr_resource; | |
787 | goto encode_op; | |
788 | } | |
789 | ||
790 | /* All operations except RENEW, SETCLIENTID, RESTOREFH | |
791 | * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH | |
792 | * require a valid current filehandle | |
793 | * | |
794 | * SETATTR NOFILEHANDLE error handled in nfsd4_setattr | |
795 | * due to required returned bitmap argument | |
796 | */ | |
797 | if ((!current_fh->fh_dentry) && | |
798 | !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) || | |
799 | (op->opnum == OP_SETCLIENTID) || | |
800 | (op->opnum == OP_SETCLIENTID_CONFIRM) || | |
801 | (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) || | |
802 | (op->opnum == OP_RELEASE_LOCKOWNER) || | |
803 | (op->opnum == OP_SETATTR))) { | |
804 | op->status = nfserr_nofilehandle; | |
805 | goto encode_op; | |
806 | } | |
807 | switch (op->opnum) { | |
808 | case OP_ACCESS: | |
809 | op->status = nfsd4_access(rqstp, current_fh, &op->u.access); | |
810 | break; | |
811 | case OP_CLOSE: | |
812 | op->status = nfsd4_close(rqstp, current_fh, &op->u.close); | |
813 | replay_owner = op->u.close.cl_stateowner; | |
814 | break; | |
815 | case OP_COMMIT: | |
816 | op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit); | |
817 | break; | |
818 | case OP_CREATE: | |
819 | op->status = nfsd4_create(rqstp, current_fh, &op->u.create); | |
820 | break; | |
821 | case OP_DELEGRETURN: | |
822 | op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn); | |
823 | break; | |
824 | case OP_GETATTR: | |
825 | op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr); | |
826 | break; | |
827 | case OP_GETFH: | |
828 | op->status = nfsd4_getfh(current_fh, &op->u.getfh); | |
829 | break; | |
830 | case OP_LINK: | |
831 | op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link); | |
832 | break; | |
833 | case OP_LOCK: | |
834 | op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock); | |
835 | replay_owner = op->u.lock.lk_stateowner; | |
836 | break; | |
837 | case OP_LOCKT: | |
838 | op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt); | |
839 | break; | |
840 | case OP_LOCKU: | |
841 | op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku); | |
842 | replay_owner = op->u.locku.lu_stateowner; | |
843 | break; | |
844 | case OP_LOOKUP: | |
845 | op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup); | |
846 | break; | |
847 | case OP_LOOKUPP: | |
848 | op->status = nfsd4_lookupp(rqstp, current_fh); | |
849 | break; | |
850 | case OP_NVERIFY: | |
851 | op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify); | |
852 | if (op->status == nfserr_not_same) | |
853 | op->status = nfs_ok; | |
854 | break; | |
855 | case OP_OPEN: | |
856 | op->status = nfsd4_open(rqstp, current_fh, &op->u.open); | |
857 | replay_owner = op->u.open.op_stateowner; | |
858 | break; | |
859 | case OP_OPEN_CONFIRM: | |
860 | op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm); | |
861 | replay_owner = op->u.open_confirm.oc_stateowner; | |
862 | break; | |
863 | case OP_OPEN_DOWNGRADE: | |
864 | op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade); | |
865 | replay_owner = op->u.open_downgrade.od_stateowner; | |
866 | break; | |
867 | case OP_PUTFH: | |
868 | op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh); | |
869 | break; | |
870 | case OP_PUTROOTFH: | |
871 | op->status = nfsd4_putrootfh(rqstp, current_fh); | |
872 | break; | |
873 | case OP_READ: | |
874 | op->status = nfsd4_read(rqstp, current_fh, &op->u.read); | |
875 | break; | |
876 | case OP_READDIR: | |
877 | op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir); | |
878 | break; | |
879 | case OP_READLINK: | |
880 | op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink); | |
881 | break; | |
882 | case OP_REMOVE: | |
883 | op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove); | |
884 | break; | |
885 | case OP_RENAME: | |
886 | op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename); | |
887 | break; | |
888 | case OP_RENEW: | |
889 | op->status = nfsd4_renew(&op->u.renew); | |
890 | break; | |
891 | case OP_RESTOREFH: | |
892 | op->status = nfsd4_restorefh(current_fh, save_fh); | |
893 | break; | |
894 | case OP_SAVEFH: | |
895 | op->status = nfsd4_savefh(current_fh, save_fh); | |
896 | break; | |
897 | case OP_SETATTR: | |
898 | op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr); | |
899 | break; | |
900 | case OP_SETCLIENTID: | |
901 | op->status = nfsd4_setclientid(rqstp, &op->u.setclientid); | |
902 | break; | |
903 | case OP_SETCLIENTID_CONFIRM: | |
904 | op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm); | |
905 | break; | |
906 | case OP_VERIFY: | |
907 | op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify); | |
908 | if (op->status == nfserr_same) | |
909 | op->status = nfs_ok; | |
910 | break; | |
911 | case OP_WRITE: | |
912 | op->status = nfsd4_write(rqstp, current_fh, &op->u.write); | |
913 | break; | |
914 | case OP_RELEASE_LOCKOWNER: | |
915 | op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner); | |
916 | break; | |
917 | default: | |
918 | BUG_ON(op->status == nfs_ok); | |
919 | break; | |
920 | } | |
921 | ||
922 | encode_op: | |
923 | if (op->status == NFSERR_REPLAY_ME) { | |
924 | op->replay = &replay_owner->so_replay; | |
925 | nfsd4_encode_replay(resp, op); | |
926 | status = op->status = op->replay->rp_status; | |
927 | } else { | |
928 | nfsd4_encode_operation(resp, op); | |
929 | status = op->status; | |
930 | } | |
931 | if (replay_owner && (replay_owner != (void *)(-1))) { | |
932 | nfs4_put_stateowner(replay_owner); | |
933 | replay_owner = NULL; | |
934 | } | |
935 | } | |
936 | ||
937 | out: | |
938 | nfsd4_release_compoundargs(args); | |
939 | if (current_fh) | |
940 | fh_put(current_fh); | |
941 | kfree(current_fh); | |
942 | if (save_fh) | |
943 | fh_put(save_fh); | |
944 | kfree(save_fh); | |
945 | return status; | |
946 | } | |
947 | ||
948 | #define nfs4svc_decode_voidargs NULL | |
949 | #define nfs4svc_release_void NULL | |
950 | #define nfsd4_voidres nfsd4_voidargs | |
951 | #define nfs4svc_release_compound NULL | |
952 | struct nfsd4_voidargs { int dummy; }; | |
953 | ||
954 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
955 | { (svc_procfunc) nfsd4_proc_##name, \ | |
956 | (kxdrproc_t) nfs4svc_decode_##argt##args, \ | |
957 | (kxdrproc_t) nfs4svc_encode_##rest##res, \ | |
958 | (kxdrproc_t) nfs4svc_release_##relt, \ | |
959 | sizeof(struct nfsd4_##argt##args), \ | |
960 | sizeof(struct nfsd4_##rest##res), \ | |
961 | 0, \ | |
962 | cache, \ | |
963 | respsize, \ | |
964 | } | |
965 | ||
966 | /* | |
967 | * TODO: At the present time, the NFSv4 server does not do XID caching | |
968 | * of requests. Implementing XID caching would not be a serious problem, | |
969 | * although it would require a mild change in interfaces since one | |
970 | * doesn't know whether an NFSv4 request is idempotent until after the | |
971 | * XDR decode. However, XID caching totally confuses pynfs (Peter | |
972 | * Astrand's regression testsuite for NFSv4 servers), which reuses | |
973 | * XID's liberally, so I've left it unimplemented until pynfs generates | |
974 | * better XID's. | |
975 | */ | |
976 | static struct svc_procedure nfsd_procedures4[2] = { | |
977 | PROC(null, void, void, void, RC_NOCACHE, 1), | |
978 | PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE) | |
979 | }; | |
980 | ||
981 | struct svc_version nfsd_version4 = { | |
982 | .vs_vers = 4, | |
983 | .vs_nproc = 2, | |
984 | .vs_proc = nfsd_procedures4, | |
985 | .vs_dispatch = nfsd_dispatch, | |
986 | .vs_xdrsize = NFS4_SVC_XDRSIZE, | |
987 | }; | |
988 | ||
989 | /* | |
990 | * Local variables: | |
991 | * c-basic-offset: 8 | |
992 | * End: | |
993 | */ |