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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) { | |
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); | |
241 | out: | |
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 | */ | |
251 | static inline int | |
252 | nfsd4_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 | ||
261 | static inline int | |
262 | nfsd4_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(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen); | |
267 | return fh_verify(rqstp, current_fh, 0, MAY_NOP); | |
268 | } | |
269 | ||
270 | static inline int | |
271 | nfsd4_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 | ||
283 | static inline int | |
284 | nfsd4_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 | ||
293 | static inline int | |
294 | nfsd4_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 | */ | |
306 | static inline int | |
307 | nfsd4_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 | ||
316 | static inline int | |
317 | nfsd4_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 | ||
331 | static int | |
332 | nfsd4_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 | ||
415 | static inline int | |
416 | nfsd4_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 | ||
434 | static inline int | |
435 | nfsd4_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 | ||
448 | static int | |
449 | nfsd4_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 | ||
466 | static inline int | |
467 | nfsd4_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 | ||
472 | static inline int | |
473 | nfsd4_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; | |
491 | out: | |
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 | ||
499 | static inline int | |
500 | nfsd4_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 | ||
522 | static inline int | |
523 | nfsd4_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 | ||
530 | static inline int | |
531 | nfsd4_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 | ||
545 | static inline int | |
546 | nfsd4_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 | ||
575 | static inline int | |
576 | nfsd4_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); | |
601 | out: | |
602 | return status; | |
603 | out_unlock: | |
604 | nfs4_unlock_state(); | |
605 | return status; | |
606 | } | |
607 | ||
608 | static inline int | |
609 | nfsd4_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; | |
642 | out: | |
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 | */ | |
652 | static int | |
653 | nfsd4_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 | ||
698 | out_kfree: | |
699 | kfree(buf); | |
700 | return status; | |
701 | } | |
702 | ||
703 | /* | |
704 | * NULL call. | |
705 | */ | |
706 | static int | |
707 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) | |
708 | { | |
709 | return nfs_ok; | |
710 | } | |
711 | ||
712 | ||
713 | /* | |
714 | * COMPOUND call. | |
715 | */ | |
716 | static int | |
717 | nfsd4_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 | ||
913 | encode_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 | ||
928 | out: | |
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 | |
943 | struct 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 | */ | |
967 | static 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 | ||
972 | struct 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 | */ |