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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 | |
38 | #include <linux/param.h> |
39 | #include <linux/major.h> |
40 | #include <linux/slab.h> |
41 | #include <linux/file.h> |
42 | |
43 | #include <linux/sunrpc/svc.h> |
44 | #include <linux/nfsd/nfsd.h> |
45 | #include <linux/nfsd/cache.h> |
46 | #include <linux/nfs4.h> |
47 | #include <linux/nfsd/state.h> |
48 | #include <linux/nfsd/xdr4.h> |
49 | #include <linux/nfs4_acl.h> |
50 | #include <linux/sunrpc/gss_api.h> |
51 | |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | |
54 | static u32 nfsd_attrmask[] = { |
55 | NFSD_WRITEABLE_ATTRS_WORD0, |
56 | NFSD_WRITEABLE_ATTRS_WORD1, |
57 | NFSD_WRITEABLE_ATTRS_WORD2 |
58 | }; |
59 | |
60 | static u32 nfsd41_ex_attrmask[] = { |
61 | NFSD_SUPPATTR_EXCLCREAT_WORD0, |
62 | NFSD_SUPPATTR_EXCLCREAT_WORD1, |
63 | NFSD_SUPPATTR_EXCLCREAT_WORD2 |
64 | }; |
65 | |
66 | static __be32 |
67 | check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
68 | u32 *bmval, u32 *writable) |
69 | { |
70 | struct dentry *dentry = cstate->current_fh.fh_dentry; |
71 | struct svc_export *exp = cstate->current_fh.fh_export; |
72 | |
73 | /* |
74 | * Check about attributes are supported by the NFSv4 server or not. |
75 | * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. |
76 | */ |
77 | if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || |
78 | (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || |
79 | (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) |
80 | return nfserr_attrnotsupp; |
81 | |
82 | /* |
83 | * Check FATTR4_WORD0_ACL & FATTR4_WORD0_FS_LOCATIONS can be supported |
84 | * in current environment or not. |
85 | */ |
86 | if (bmval[0] & FATTR4_WORD0_ACL) { |
87 | if (!IS_POSIXACL(dentry->d_inode)) |
88 | return nfserr_attrnotsupp; |
89 | } |
90 | if (bmval[0] & FATTR4_WORD0_FS_LOCATIONS) { |
91 | if (exp->ex_fslocs.locations == NULL) |
92 | return nfserr_attrnotsupp; |
93 | } |
94 | |
95 | /* |
96 | * According to spec, read-only attributes return ERR_INVAL. |
97 | */ |
98 | if (writable) { |
99 | if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || |
100 | (bmval[2] & ~writable[2])) |
101 | return nfserr_inval; |
102 | } |
103 | |
104 | return nfs_ok; |
105 | } |
106 | |
107 | static __be32 |
108 | nfsd4_check_open_attributes(struct svc_rqst *rqstp, |
109 | struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
110 | { |
111 | __be32 status = nfs_ok; |
112 | |
113 | if (open->op_create == NFS4_OPEN_CREATE) { |
114 | if (open->op_createmode == NFS4_CREATE_UNCHECKED |
115 | || open->op_createmode == NFS4_CREATE_GUARDED) |
116 | status = check_attr_support(rqstp, cstate, |
117 | open->op_bmval, nfsd_attrmask); |
118 | else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) |
119 | status = check_attr_support(rqstp, cstate, |
120 | open->op_bmval, nfsd41_ex_attrmask); |
121 | } |
122 | |
123 | return status; |
124 | } |
125 | |
126 | static inline void |
127 | fh_dup2(struct svc_fh *dst, struct svc_fh *src) |
128 | { |
129 | fh_put(dst); |
130 | dget(src->fh_dentry); |
131 | if (src->fh_export) |
132 | cache_get(&src->fh_export->h); |
133 | *dst = *src; |
134 | } |
135 | |
136 | static __be32 |
137 | do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) |
138 | { |
139 | __be32 status; |
140 | |
141 | if (open->op_truncate && |
142 | !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
143 | return nfserr_inval; |
144 | |
145 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
146 | accmode |= NFSD_MAY_READ; |
147 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
148 | accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); |
149 | if (open->op_share_deny & NFS4_SHARE_DENY_WRITE) |
150 | accmode |= NFSD_MAY_WRITE; |
151 | |
152 | status = fh_verify(rqstp, current_fh, S_IFREG, accmode); |
153 | |
154 | return status; |
155 | } |
156 | |
157 | static __be32 |
158 | do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
159 | { |
160 | struct svc_fh resfh; |
161 | __be32 status; |
162 | int created = 0; |
163 | |
164 | fh_init(&resfh, NFS4_FHSIZE); |
165 | open->op_truncate = 0; |
166 | |
167 | if (open->op_create) { |
168 | /* FIXME: check session persistence and pnfs flags. |
169 | * The nfsv4.1 spec requires the following semantics: |
170 | * |
171 | * Persistent | pNFS | Server REQUIRED | Client Allowed |
172 | * Reply Cache | server | | |
173 | * -------------+--------+-----------------+-------------------- |
174 | * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 |
175 | * | | | (SHOULD) |
176 | * | | and EXCLUSIVE4 | or EXCLUSIVE4 |
177 | * | | | (SHOULD NOT) |
178 | * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 |
179 | * yes | no | GUARDED4 | GUARDED4 |
180 | * yes | yes | GUARDED4 | GUARDED4 |
181 | */ |
182 | |
183 | /* |
184 | * Note: create modes (UNCHECKED,GUARDED...) are the same |
185 | * in NFSv4 as in v3. |
186 | */ |
187 | status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, |
188 | open->op_fname.len, &open->op_iattr, |
189 | &resfh, open->op_createmode, |
190 | (u32 *)open->op_verf.data, |
191 | &open->op_truncate, &created); |
192 | |
193 | /* |
194 | * Following rfc 3530 14.2.16, use the returned bitmask |
195 | * to indicate which attributes we used to store the |
196 | * verifier: |
197 | */ |
198 | if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) |
199 | open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | |
200 | FATTR4_WORD1_TIME_MODIFY); |
201 | } else { |
202 | status = nfsd_lookup(rqstp, current_fh, |
203 | open->op_fname.data, open->op_fname.len, &resfh); |
204 | fh_unlock(current_fh); |
205 | } |
206 | if (status) |
207 | goto out; |
208 | |
209 | set_change_info(&open->op_cinfo, current_fh); |
210 | fh_dup2(current_fh, &resfh); |
211 | |
212 | /* set reply cache */ |
213 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
214 | &resfh.fh_handle); |
215 | if (!created) |
216 | status = do_open_permission(rqstp, current_fh, open, |
217 | NFSD_MAY_NOP); |
218 | |
219 | out: |
220 | fh_put(&resfh); |
221 | return status; |
222 | } |
223 | |
224 | static __be32 |
225 | do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
226 | { |
227 | __be32 status; |
228 | |
229 | /* Only reclaims from previously confirmed clients are valid */ |
230 | if ((status = nfs4_check_open_reclaim(&open->op_clientid))) |
231 | return status; |
232 | |
233 | /* We don't know the target directory, and therefore can not |
234 | * set the change info |
235 | */ |
236 | |
237 | memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); |
238 | |
239 | /* set replay cache */ |
240 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
241 | ¤t_fh->fh_handle); |
242 | |
243 | open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && |
244 | (open->op_iattr.ia_size == 0); |
245 | |
246 | status = do_open_permission(rqstp, current_fh, open, |
247 | NFSD_MAY_OWNER_OVERRIDE); |
248 | |
249 | return status; |
250 | } |
251 | |
252 | static void |
253 | copy_clientid(clientid_t *clid, struct nfsd4_session *session) |
254 | { |
255 | struct nfsd4_sessionid *sid = |
256 | (struct nfsd4_sessionid *)session->se_sessionid.data; |
257 | |
258 | clid->cl_boot = sid->clientid.cl_boot; |
259 | clid->cl_id = sid->clientid.cl_id; |
260 | } |
261 | |
262 | static __be32 |
263 | nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
264 | struct nfsd4_open *open) |
265 | { |
266 | __be32 status; |
267 | struct nfsd4_compoundres *resp; |
268 | |
269 | dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", |
270 | (int)open->op_fname.len, open->op_fname.data, |
271 | open->op_stateowner); |
272 | |
273 | /* This check required by spec. */ |
274 | if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) |
275 | return nfserr_inval; |
276 | |
277 | if (nfsd4_has_session(cstate)) |
278 | copy_clientid(&open->op_clientid, cstate->session); |
279 | |
280 | nfs4_lock_state(); |
281 | |
282 | /* check seqid for replay. set nfs4_owner */ |
283 | resp = rqstp->rq_resp; |
284 | status = nfsd4_process_open1(&resp->cstate, open); |
285 | if (status == nfserr_replay_me) { |
286 | struct nfs4_replay *rp = &open->op_stateowner->so_replay; |
287 | fh_put(&cstate->current_fh); |
288 | fh_copy_shallow(&cstate->current_fh.fh_handle, |
289 | &rp->rp_openfh); |
290 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
291 | if (status) |
292 | dprintk("nfsd4_open: replay failed" |
293 | " restoring previous filehandle\n"); |
294 | else |
295 | status = nfserr_replay_me; |
296 | } |
297 | if (status) |
298 | goto out; |
299 | |
300 | status = nfsd4_check_open_attributes(rqstp, cstate, open); |
301 | if (status) |
302 | goto out; |
303 | |
304 | /* Openowner is now set, so sequence id will get bumped. Now we need |
305 | * these checks before we do any creates: */ |
306 | status = nfserr_grace; |
307 | if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
308 | goto out; |
309 | status = nfserr_no_grace; |
310 | if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
311 | goto out; |
312 | |
313 | switch (open->op_claim_type) { |
314 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
315 | case NFS4_OPEN_CLAIM_NULL: |
316 | /* |
317 | * (1) set CURRENT_FH to the file being opened, |
318 | * creating it if necessary, (2) set open->op_cinfo, |
319 | * (3) set open->op_truncate if the file is to be |
320 | * truncated after opening, (4) do permission checking. |
321 | */ |
322 | status = do_open_lookup(rqstp, &cstate->current_fh, |
323 | open); |
324 | if (status) |
325 | goto out; |
326 | break; |
327 | case NFS4_OPEN_CLAIM_PREVIOUS: |
328 | open->op_stateowner->so_confirmed = 1; |
329 | /* |
330 | * The CURRENT_FH is already set to the file being |
331 | * opened. (1) set open->op_cinfo, (2) set |
332 | * open->op_truncate if the file is to be truncated |
333 | * after opening, (3) do permission checking. |
334 | */ |
335 | status = do_open_fhandle(rqstp, &cstate->current_fh, |
336 | open); |
337 | if (status) |
338 | goto out; |
339 | break; |
340 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
341 | open->op_stateowner->so_confirmed = 1; |
342 | dprintk("NFSD: unsupported OPEN claim type %d\n", |
343 | open->op_claim_type); |
344 | status = nfserr_notsupp; |
345 | goto out; |
346 | default: |
347 | dprintk("NFSD: Invalid OPEN claim type %d\n", |
348 | open->op_claim_type); |
349 | status = nfserr_inval; |
350 | goto out; |
351 | } |
352 | /* |
353 | * nfsd4_process_open2() does the actual opening of the file. If |
354 | * successful, it (1) truncates the file if open->op_truncate was |
355 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. |
356 | */ |
357 | status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); |
358 | out: |
359 | if (open->op_stateowner) { |
360 | nfs4_get_stateowner(open->op_stateowner); |
361 | cstate->replay_owner = open->op_stateowner; |
362 | } |
363 | nfs4_unlock_state(); |
364 | return status; |
365 | } |
366 | |
367 | /* |
368 | * filehandle-manipulating ops. |
369 | */ |
370 | static __be32 |
371 | nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
372 | struct svc_fh **getfh) |
373 | { |
374 | if (!cstate->current_fh.fh_dentry) |
375 | return nfserr_nofilehandle; |
376 | |
377 | *getfh = &cstate->current_fh; |
378 | return nfs_ok; |
379 | } |
380 | |
381 | static __be32 |
382 | nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
383 | struct nfsd4_putfh *putfh) |
384 | { |
385 | fh_put(&cstate->current_fh); |
386 | cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; |
387 | memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, |
388 | putfh->pf_fhlen); |
389 | return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
390 | } |
391 | |
392 | static __be32 |
393 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
394 | void *arg) |
395 | { |
396 | __be32 status; |
397 | |
398 | fh_put(&cstate->current_fh); |
399 | status = exp_pseudoroot(rqstp, &cstate->current_fh); |
400 | return status; |
401 | } |
402 | |
403 | static __be32 |
404 | nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
405 | void *arg) |
406 | { |
407 | if (!cstate->save_fh.fh_dentry) |
408 | return nfserr_restorefh; |
409 | |
410 | fh_dup2(&cstate->current_fh, &cstate->save_fh); |
411 | return nfs_ok; |
412 | } |
413 | |
414 | static __be32 |
415 | nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
416 | void *arg) |
417 | { |
418 | if (!cstate->current_fh.fh_dentry) |
419 | return nfserr_nofilehandle; |
420 | |
421 | fh_dup2(&cstate->save_fh, &cstate->current_fh); |
422 | return nfs_ok; |
423 | } |
424 | |
425 | /* |
426 | * misc nfsv4 ops |
427 | */ |
428 | static __be32 |
429 | nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
430 | struct nfsd4_access *access) |
431 | { |
432 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) |
433 | return nfserr_inval; |
434 | |
435 | access->ac_resp_access = access->ac_req_access; |
436 | return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
437 | &access->ac_supported); |
438 | } |
439 | |
440 | static __be32 |
441 | nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
442 | struct nfsd4_commit *commit) |
443 | { |
444 | __be32 status; |
445 | |
446 | u32 *p = (u32 *)commit->co_verf.data; |
447 | *p++ = nfssvc_boot.tv_sec; |
448 | *p++ = nfssvc_boot.tv_usec; |
449 | |
450 | status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
451 | commit->co_count); |
452 | if (status == nfserr_symlink) |
453 | status = nfserr_inval; |
454 | return status; |
455 | } |
456 | |
457 | static __be32 |
458 | nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
459 | struct nfsd4_create *create) |
460 | { |
461 | struct svc_fh resfh; |
462 | __be32 status; |
463 | dev_t rdev; |
464 | |
465 | fh_init(&resfh, NFS4_FHSIZE); |
466 | |
467 | status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, |
468 | NFSD_MAY_CREATE); |
469 | if (status == nfserr_symlink) |
470 | status = nfserr_notdir; |
471 | if (status) |
472 | return status; |
473 | |
474 | status = check_attr_support(rqstp, cstate, create->cr_bmval, |
475 | nfsd_attrmask); |
476 | if (status) |
477 | return status; |
478 | |
479 | switch (create->cr_type) { |
480 | case NF4LNK: |
481 | /* ugh! we have to null-terminate the linktext, or |
482 | * vfs_symlink() will choke. it is always safe to |
483 | * null-terminate by brute force, since at worst we |
484 | * will overwrite the first byte of the create namelen |
485 | * in the XDR buffer, which has already been extracted |
486 | * during XDR decode. |
487 | */ |
488 | create->cr_linkname[create->cr_linklen] = 0; |
489 | |
490 | status = nfsd_symlink(rqstp, &cstate->current_fh, |
491 | create->cr_name, create->cr_namelen, |
492 | create->cr_linkname, create->cr_linklen, |
493 | &resfh, &create->cr_iattr); |
494 | break; |
495 | |
496 | case NF4BLK: |
497 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); |
498 | if (MAJOR(rdev) != create->cr_specdata1 || |
499 | MINOR(rdev) != create->cr_specdata2) |
500 | return nfserr_inval; |
501 | status = nfsd_create(rqstp, &cstate->current_fh, |
502 | create->cr_name, create->cr_namelen, |
503 | &create->cr_iattr, S_IFBLK, rdev, &resfh); |
504 | break; |
505 | |
506 | case NF4CHR: |
507 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); |
508 | if (MAJOR(rdev) != create->cr_specdata1 || |
509 | MINOR(rdev) != create->cr_specdata2) |
510 | return nfserr_inval; |
511 | status = nfsd_create(rqstp, &cstate->current_fh, |
512 | create->cr_name, create->cr_namelen, |
513 | &create->cr_iattr,S_IFCHR, rdev, &resfh); |
514 | break; |
515 | |
516 | case NF4SOCK: |
517 | status = nfsd_create(rqstp, &cstate->current_fh, |
518 | create->cr_name, create->cr_namelen, |
519 | &create->cr_iattr, S_IFSOCK, 0, &resfh); |
520 | break; |
521 | |
522 | case NF4FIFO: |
523 | status = nfsd_create(rqstp, &cstate->current_fh, |
524 | create->cr_name, create->cr_namelen, |
525 | &create->cr_iattr, S_IFIFO, 0, &resfh); |
526 | break; |
527 | |
528 | case NF4DIR: |
529 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; |
530 | status = nfsd_create(rqstp, &cstate->current_fh, |
531 | create->cr_name, create->cr_namelen, |
532 | &create->cr_iattr, S_IFDIR, 0, &resfh); |
533 | break; |
534 | |
535 | default: |
536 | status = nfserr_badtype; |
537 | } |
538 | |
539 | if (!status) { |
540 | fh_unlock(&cstate->current_fh); |
541 | set_change_info(&create->cr_cinfo, &cstate->current_fh); |
542 | fh_dup2(&cstate->current_fh, &resfh); |
543 | } |
544 | |
545 | fh_put(&resfh); |
546 | return status; |
547 | } |
548 | |
549 | static __be32 |
550 | nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
551 | struct nfsd4_getattr *getattr) |
552 | { |
553 | __be32 status; |
554 | |
555 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
556 | if (status) |
557 | return status; |
558 | |
559 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) |
560 | return nfserr_inval; |
561 | |
562 | getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
563 | getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); |
564 | getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); |
565 | |
566 | getattr->ga_fhp = &cstate->current_fh; |
567 | return nfs_ok; |
568 | } |
569 | |
570 | static __be32 |
571 | nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
572 | struct nfsd4_link *link) |
573 | { |
574 | __be32 status = nfserr_nofilehandle; |
575 | |
576 | if (!cstate->save_fh.fh_dentry) |
577 | return status; |
578 | status = nfsd_link(rqstp, &cstate->current_fh, |
579 | link->li_name, link->li_namelen, &cstate->save_fh); |
580 | if (!status) |
581 | set_change_info(&link->li_cinfo, &cstate->current_fh); |
582 | return status; |
583 | } |
584 | |
585 | static __be32 |
586 | nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
587 | void *arg) |
588 | { |
589 | struct svc_fh tmp_fh; |
590 | __be32 ret; |
591 | |
592 | fh_init(&tmp_fh, NFS4_FHSIZE); |
593 | ret = exp_pseudoroot(rqstp, &tmp_fh); |
594 | if (ret) |
595 | return ret; |
596 | if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { |
597 | fh_put(&tmp_fh); |
598 | return nfserr_noent; |
599 | } |
600 | fh_put(&tmp_fh); |
601 | return nfsd_lookup(rqstp, &cstate->current_fh, |
602 | "..", 2, &cstate->current_fh); |
603 | } |
604 | |
605 | static __be32 |
606 | nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
607 | struct nfsd4_lookup *lookup) |
608 | { |
609 | return nfsd_lookup(rqstp, &cstate->current_fh, |
610 | lookup->lo_name, lookup->lo_len, |
611 | &cstate->current_fh); |
612 | } |
613 | |
614 | static __be32 |
615 | nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
616 | struct nfsd4_read *read) |
617 | { |
618 | __be32 status; |
619 | |
620 | /* no need to check permission - this will be done in nfsd_read() */ |
621 | |
622 | read->rd_filp = NULL; |
623 | if (read->rd_offset >= OFFSET_MAX) |
624 | return nfserr_inval; |
625 | |
626 | nfs4_lock_state(); |
627 | /* check stateid */ |
628 | if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, |
629 | RD_STATE, &read->rd_filp))) { |
630 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
631 | goto out; |
632 | } |
633 | if (read->rd_filp) |
634 | get_file(read->rd_filp); |
635 | status = nfs_ok; |
636 | out: |
637 | nfs4_unlock_state(); |
638 | read->rd_rqstp = rqstp; |
639 | read->rd_fhp = &cstate->current_fh; |
640 | return status; |
641 | } |
642 | |
643 | static __be32 |
644 | nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
645 | struct nfsd4_readdir *readdir) |
646 | { |
647 | u64 cookie = readdir->rd_cookie; |
648 | static const nfs4_verifier zeroverf; |
649 | |
650 | /* no need to check permission - this will be done in nfsd_readdir() */ |
651 | |
652 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) |
653 | return nfserr_inval; |
654 | |
655 | readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
656 | readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); |
657 | readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); |
658 | |
659 | if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || |
660 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) |
661 | return nfserr_bad_cookie; |
662 | |
663 | readdir->rd_rqstp = rqstp; |
664 | readdir->rd_fhp = &cstate->current_fh; |
665 | return nfs_ok; |
666 | } |
667 | |
668 | static __be32 |
669 | nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
670 | struct nfsd4_readlink *readlink) |
671 | { |
672 | readlink->rl_rqstp = rqstp; |
673 | readlink->rl_fhp = &cstate->current_fh; |
674 | return nfs_ok; |
675 | } |
676 | |
677 | static __be32 |
678 | nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
679 | struct nfsd4_remove *remove) |
680 | { |
681 | __be32 status; |
682 | |
683 | if (locks_in_grace()) |
684 | return nfserr_grace; |
685 | status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
686 | remove->rm_name, remove->rm_namelen); |
687 | if (status == nfserr_symlink) |
688 | return nfserr_notdir; |
689 | if (!status) { |
690 | fh_unlock(&cstate->current_fh); |
691 | set_change_info(&remove->rm_cinfo, &cstate->current_fh); |
692 | } |
693 | return status; |
694 | } |
695 | |
696 | static __be32 |
697 | nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
698 | struct nfsd4_rename *rename) |
699 | { |
700 | __be32 status = nfserr_nofilehandle; |
701 | |
702 | if (!cstate->save_fh.fh_dentry) |
703 | return status; |
704 | if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags |
705 | & NFSEXP_NOSUBTREECHECK)) |
706 | return nfserr_grace; |
707 | status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
708 | rename->rn_snamelen, &cstate->current_fh, |
709 | rename->rn_tname, rename->rn_tnamelen); |
710 | |
711 | /* the underlying filesystem returns different error's than required |
712 | * by NFSv4. both save_fh and current_fh have been verified.. */ |
713 | if (status == nfserr_isdir) |
714 | status = nfserr_exist; |
715 | else if ((status == nfserr_notdir) && |
716 | (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && |
717 | S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) |
718 | status = nfserr_exist; |
719 | else if (status == nfserr_symlink) |
720 | status = nfserr_notdir; |
721 | |
722 | if (!status) { |
723 | set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
724 | set_change_info(&rename->rn_tinfo, &cstate->save_fh); |
725 | } |
726 | return status; |
727 | } |
728 | |
729 | static __be32 |
730 | nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
731 | struct nfsd4_secinfo *secinfo) |
732 | { |
733 | struct svc_fh resfh; |
734 | struct svc_export *exp; |
735 | struct dentry *dentry; |
736 | __be32 err; |
737 | |
738 | fh_init(&resfh, NFS4_FHSIZE); |
739 | err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, |
740 | secinfo->si_name, secinfo->si_namelen, |
741 | &exp, &dentry); |
742 | if (err) |
743 | return err; |
744 | if (dentry->d_inode == NULL) { |
745 | exp_put(exp); |
746 | err = nfserr_noent; |
747 | } else |
748 | secinfo->si_exp = exp; |
749 | dput(dentry); |
750 | return err; |
751 | } |
752 | |
753 | static __be32 |
754 | nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
755 | struct nfsd4_setattr *setattr) |
756 | { |
757 | __be32 status = nfs_ok; |
758 | |
759 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
760 | nfs4_lock_state(); |
761 | status = nfs4_preprocess_stateid_op(cstate, |
762 | &setattr->sa_stateid, WR_STATE, NULL); |
763 | nfs4_unlock_state(); |
764 | if (status) { |
765 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
766 | return status; |
767 | } |
768 | } |
769 | status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); |
770 | if (status) |
771 | return status; |
772 | status = nfs_ok; |
773 | |
774 | status = check_attr_support(rqstp, cstate, setattr->sa_bmval, |
775 | nfsd_attrmask); |
776 | if (status) |
777 | goto out; |
778 | |
779 | if (setattr->sa_acl != NULL) |
780 | status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
781 | setattr->sa_acl); |
782 | if (status) |
783 | goto out; |
784 | status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
785 | 0, (time_t)0); |
786 | out: |
787 | mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); |
788 | return status; |
789 | } |
790 | |
791 | static __be32 |
792 | nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
793 | struct nfsd4_write *write) |
794 | { |
795 | stateid_t *stateid = &write->wr_stateid; |
796 | struct file *filp = NULL; |
797 | u32 *p; |
798 | __be32 status = nfs_ok; |
799 | unsigned long cnt; |
800 | |
801 | /* no need to check permission - this will be done in nfsd_write() */ |
802 | |
803 | if (write->wr_offset >= OFFSET_MAX) |
804 | return nfserr_inval; |
805 | |
806 | nfs4_lock_state(); |
807 | status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); |
808 | if (filp) |
809 | get_file(filp); |
810 | nfs4_unlock_state(); |
811 | |
812 | if (status) { |
813 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); |
814 | return status; |
815 | } |
816 | |
817 | cnt = write->wr_buflen; |
818 | write->wr_how_written = write->wr_stable_how; |
819 | p = (u32 *)write->wr_verifier.data; |
820 | *p++ = nfssvc_boot.tv_sec; |
821 | *p++ = nfssvc_boot.tv_usec; |
822 | |
823 | status = nfsd_write(rqstp, &cstate->current_fh, filp, |
824 | write->wr_offset, rqstp->rq_vec, write->wr_vlen, |
825 | &cnt, &write->wr_how_written); |
826 | if (filp) |
827 | fput(filp); |
828 | |
829 | write->wr_bytes_written = cnt; |
830 | |
831 | if (status == nfserr_symlink) |
832 | status = nfserr_inval; |
833 | return status; |
834 | } |
835 | |
836 | /* This routine never returns NFS_OK! If there are no other errors, it |
837 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the |
838 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME |
839 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. |
840 | */ |
841 | static __be32 |
842 | _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
843 | struct nfsd4_verify *verify) |
844 | { |
845 | __be32 *buf, *p; |
846 | int count; |
847 | __be32 status; |
848 | |
849 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
850 | if (status) |
851 | return status; |
852 | |
853 | status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); |
854 | if (status) |
855 | return status; |
856 | |
857 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) |
858 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) |
859 | return nfserr_inval; |
860 | if (verify->ve_attrlen & 3) |
861 | return nfserr_inval; |
862 | |
863 | /* count in words: |
864 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 |
865 | */ |
866 | count = 4 + (verify->ve_attrlen >> 2); |
867 | buf = kmalloc(count << 2, GFP_KERNEL); |
868 | if (!buf) |
869 | return nfserr_resource; |
870 | |
871 | status = nfsd4_encode_fattr(&cstate->current_fh, |
872 | cstate->current_fh.fh_export, |
873 | cstate->current_fh.fh_dentry, buf, |
874 | &count, verify->ve_bmval, |
875 | rqstp, 0); |
876 | |
877 | /* this means that nfsd4_encode_fattr() ran out of space */ |
878 | if (status == nfserr_resource && count == 0) |
879 | status = nfserr_not_same; |
880 | if (status) |
881 | goto out_kfree; |
882 | |
883 | /* skip bitmap */ |
884 | p = buf + 1 + ntohl(buf[0]); |
885 | status = nfserr_not_same; |
886 | if (ntohl(*p++) != verify->ve_attrlen) |
887 | goto out_kfree; |
888 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) |
889 | status = nfserr_same; |
890 | |
891 | out_kfree: |
892 | kfree(buf); |
893 | return status; |
894 | } |
895 | |
896 | static __be32 |
897 | nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
898 | struct nfsd4_verify *verify) |
899 | { |
900 | __be32 status; |
901 | |
902 | status = _nfsd4_verify(rqstp, cstate, verify); |
903 | return status == nfserr_not_same ? nfs_ok : status; |
904 | } |
905 | |
906 | static __be32 |
907 | nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
908 | struct nfsd4_verify *verify) |
909 | { |
910 | __be32 status; |
911 | |
912 | status = _nfsd4_verify(rqstp, cstate, verify); |
913 | return status == nfserr_same ? nfs_ok : status; |
914 | } |
915 | |
916 | /* |
917 | * NULL call. |
918 | */ |
919 | static __be32 |
920 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
921 | { |
922 | return nfs_ok; |
923 | } |
924 | |
925 | static inline void nfsd4_increment_op_stats(u32 opnum) |
926 | { |
927 | if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) |
928 | nfsdstats.nfs4_opcount[opnum]++; |
929 | } |
930 | |
931 | typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
932 | void *); |
933 | enum nfsd4_op_flags { |
934 | ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ |
935 | ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ |
936 | ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ |
937 | }; |
938 | |
939 | struct nfsd4_operation { |
940 | nfsd4op_func op_func; |
941 | u32 op_flags; |
942 | char *op_name; |
943 | }; |
944 | |
945 | static struct nfsd4_operation nfsd4_ops[]; |
946 | |
947 | static const char *nfsd4_op_name(unsigned opnum); |
948 | |
949 | /* |
950 | * This is a replay of a compound for which no cache entry pages |
951 | * were used. Encode the sequence operation, and if cachethis is FALSE |
952 | * encode the uncache rep error on the next operation. |
953 | */ |
954 | static __be32 |
955 | nfsd4_enc_uncached_replay(struct nfsd4_compoundargs *args, |
956 | struct nfsd4_compoundres *resp) |
957 | { |
958 | struct nfsd4_op *op; |
959 | |
960 | dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__, |
961 | resp->opcnt, resp->cstate.slot->sl_cache_entry.ce_cachethis); |
962 | |
963 | /* Encode the replayed sequence operation */ |
964 | BUG_ON(resp->opcnt != 1); |
965 | op = &args->ops[resp->opcnt - 1]; |
966 | nfsd4_encode_operation(resp, op); |
967 | |
968 | /*return nfserr_retry_uncached_rep in next operation. */ |
969 | if (resp->cstate.slot->sl_cache_entry.ce_cachethis == 0) { |
970 | op = &args->ops[resp->opcnt++]; |
971 | op->status = nfserr_retry_uncached_rep; |
972 | nfsd4_encode_operation(resp, op); |
973 | } |
974 | return op->status; |
975 | } |
976 | |
977 | /* |
978 | * Enforce NFSv4.1 COMPOUND ordering rules. |
979 | * |
980 | * TODO: |
981 | * - enforce NFS4ERR_NOT_ONLY_OP, |
982 | * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. |
983 | */ |
984 | static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) |
985 | { |
986 | if (args->minorversion && args->opcnt > 0) { |
987 | struct nfsd4_op *op = &args->ops[0]; |
988 | return (op->status == nfserr_op_illegal) || |
989 | (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); |
990 | } |
991 | return true; |
992 | } |
993 | |
994 | /* |
995 | * COMPOUND call. |
996 | */ |
997 | static __be32 |
998 | nfsd4_proc_compound(struct svc_rqst *rqstp, |
999 | struct nfsd4_compoundargs *args, |
1000 | struct nfsd4_compoundres *resp) |
1001 | { |
1002 | struct nfsd4_op *op; |
1003 | struct nfsd4_operation *opdesc; |
1004 | struct nfsd4_compound_state *cstate = &resp->cstate; |
1005 | int slack_bytes; |
1006 | __be32 status; |
1007 | |
1008 | resp->xbuf = &rqstp->rq_res; |
1009 | resp->p = rqstp->rq_res.head[0].iov_base + |
1010 | rqstp->rq_res.head[0].iov_len; |
1011 | resp->tagp = resp->p; |
1012 | /* reserve space for: taglen, tag, and opcnt */ |
1013 | resp->p += 2 + XDR_QUADLEN(args->taglen); |
1014 | resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; |
1015 | resp->taglen = args->taglen; |
1016 | resp->tag = args->tag; |
1017 | resp->opcnt = 0; |
1018 | resp->rqstp = rqstp; |
1019 | resp->cstate.minorversion = args->minorversion; |
1020 | resp->cstate.replay_owner = NULL; |
1021 | fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); |
1022 | fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); |
1023 | /* Use the deferral mechanism only for NFSv4.0 compounds */ |
1024 | rqstp->rq_usedeferral = (args->minorversion == 0); |
1025 | |
1026 | /* |
1027 | * According to RFC3010, this takes precedence over all other errors. |
1028 | */ |
1029 | status = nfserr_minor_vers_mismatch; |
1030 | if (args->minorversion > nfsd_supported_minorversion) |
1031 | goto out; |
1032 | |
1033 | if (!nfs41_op_ordering_ok(args)) { |
1034 | op = &args->ops[0]; |
1035 | op->status = nfserr_sequence_pos; |
1036 | goto encode_op; |
1037 | } |
1038 | |
1039 | status = nfs_ok; |
1040 | while (!status && resp->opcnt < args->opcnt) { |
1041 | op = &args->ops[resp->opcnt++]; |
1042 | |
1043 | dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", |
1044 | resp->opcnt, args->opcnt, op->opnum, |
1045 | nfsd4_op_name(op->opnum)); |
1046 | /* |
1047 | * The XDR decode routines may have pre-set op->status; |
1048 | * for example, if there is a miscellaneous XDR error |
1049 | * it will be set to nfserr_bad_xdr. |
1050 | */ |
1051 | if (op->status) |
1052 | goto encode_op; |
1053 | |
1054 | /* We must be able to encode a successful response to |
1055 | * this operation, with enough room left over to encode a |
1056 | * failed response to the next operation. If we don't |
1057 | * have enough room, fail with ERR_RESOURCE. |
1058 | */ |
1059 | slack_bytes = (char *)resp->end - (char *)resp->p; |
1060 | if (slack_bytes < COMPOUND_SLACK_SPACE |
1061 | + COMPOUND_ERR_SLACK_SPACE) { |
1062 | BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); |
1063 | op->status = nfserr_resource; |
1064 | goto encode_op; |
1065 | } |
1066 | |
1067 | opdesc = &nfsd4_ops[op->opnum]; |
1068 | |
1069 | if (!cstate->current_fh.fh_dentry) { |
1070 | if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
1071 | op->status = nfserr_nofilehandle; |
1072 | goto encode_op; |
1073 | } |
1074 | } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && |
1075 | !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { |
1076 | op->status = nfserr_moved; |
1077 | goto encode_op; |
1078 | } |
1079 | |
1080 | if (opdesc->op_func) |
1081 | op->status = opdesc->op_func(rqstp, cstate, &op->u); |
1082 | else |
1083 | BUG_ON(op->status == nfs_ok); |
1084 | |
1085 | encode_op: |
1086 | /* Only from SEQUENCE or CREATE_SESSION */ |
1087 | if (resp->cstate.status == nfserr_replay_cache) { |
1088 | dprintk("%s NFS4.1 replay from cache\n", __func__); |
1089 | if (nfsd4_not_cached(resp)) |
1090 | status = nfsd4_enc_uncached_replay(args, resp); |
1091 | else |
1092 | status = op->status; |
1093 | goto out; |
1094 | } |
1095 | if (op->status == nfserr_replay_me) { |
1096 | op->replay = &cstate->replay_owner->so_replay; |
1097 | nfsd4_encode_replay(resp, op); |
1098 | status = op->status = op->replay->rp_status; |
1099 | } else { |
1100 | nfsd4_encode_operation(resp, op); |
1101 | status = op->status; |
1102 | } |
1103 | |
1104 | dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", |
1105 | args->ops, args->opcnt, resp->opcnt, op->opnum, |
1106 | be32_to_cpu(status)); |
1107 | |
1108 | if (cstate->replay_owner) { |
1109 | nfs4_put_stateowner(cstate->replay_owner); |
1110 | cstate->replay_owner = NULL; |
1111 | } |
1112 | /* XXX Ugh, we need to get rid of this kind of special case: */ |
1113 | if (op->opnum == OP_READ && op->u.read.rd_filp) |
1114 | fput(op->u.read.rd_filp); |
1115 | |
1116 | nfsd4_increment_op_stats(op->opnum); |
1117 | } |
1118 | if (!rqstp->rq_usedeferral && status == nfserr_dropit) { |
1119 | dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); |
1120 | status = nfserr_jukebox; |
1121 | } |
1122 | |
1123 | resp->cstate.status = status; |
1124 | fh_put(&resp->cstate.current_fh); |
1125 | fh_put(&resp->cstate.save_fh); |
1126 | BUG_ON(resp->cstate.replay_owner); |
1127 | out: |
1128 | nfsd4_release_compoundargs(args); |
1129 | /* Reset deferral mechanism for RPC deferrals */ |
1130 | rqstp->rq_usedeferral = 1; |
1131 | dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
1132 | return status; |
1133 | } |
1134 | |
1135 | static struct nfsd4_operation nfsd4_ops[] = { |
1136 | [OP_ACCESS] = { |
1137 | .op_func = (nfsd4op_func)nfsd4_access, |
1138 | .op_name = "OP_ACCESS", |
1139 | }, |
1140 | [OP_CLOSE] = { |
1141 | .op_func = (nfsd4op_func)nfsd4_close, |
1142 | .op_name = "OP_CLOSE", |
1143 | }, |
1144 | [OP_COMMIT] = { |
1145 | .op_func = (nfsd4op_func)nfsd4_commit, |
1146 | .op_name = "OP_COMMIT", |
1147 | }, |
1148 | [OP_CREATE] = { |
1149 | .op_func = (nfsd4op_func)nfsd4_create, |
1150 | .op_name = "OP_CREATE", |
1151 | }, |
1152 | [OP_DELEGRETURN] = { |
1153 | .op_func = (nfsd4op_func)nfsd4_delegreturn, |
1154 | .op_name = "OP_DELEGRETURN", |
1155 | }, |
1156 | [OP_GETATTR] = { |
1157 | .op_func = (nfsd4op_func)nfsd4_getattr, |
1158 | .op_flags = ALLOWED_ON_ABSENT_FS, |
1159 | .op_name = "OP_GETATTR", |
1160 | }, |
1161 | [OP_GETFH] = { |
1162 | .op_func = (nfsd4op_func)nfsd4_getfh, |
1163 | .op_name = "OP_GETFH", |
1164 | }, |
1165 | [OP_LINK] = { |
1166 | .op_func = (nfsd4op_func)nfsd4_link, |
1167 | .op_name = "OP_LINK", |
1168 | }, |
1169 | [OP_LOCK] = { |
1170 | .op_func = (nfsd4op_func)nfsd4_lock, |
1171 | .op_name = "OP_LOCK", |
1172 | }, |
1173 | [OP_LOCKT] = { |
1174 | .op_func = (nfsd4op_func)nfsd4_lockt, |
1175 | .op_name = "OP_LOCKT", |
1176 | }, |
1177 | [OP_LOCKU] = { |
1178 | .op_func = (nfsd4op_func)nfsd4_locku, |
1179 | .op_name = "OP_LOCKU", |
1180 | }, |
1181 | [OP_LOOKUP] = { |
1182 | .op_func = (nfsd4op_func)nfsd4_lookup, |
1183 | .op_name = "OP_LOOKUP", |
1184 | }, |
1185 | [OP_LOOKUPP] = { |
1186 | .op_func = (nfsd4op_func)nfsd4_lookupp, |
1187 | .op_name = "OP_LOOKUPP", |
1188 | }, |
1189 | [OP_NVERIFY] = { |
1190 | .op_func = (nfsd4op_func)nfsd4_nverify, |
1191 | .op_name = "OP_NVERIFY", |
1192 | }, |
1193 | [OP_OPEN] = { |
1194 | .op_func = (nfsd4op_func)nfsd4_open, |
1195 | .op_name = "OP_OPEN", |
1196 | }, |
1197 | [OP_OPEN_CONFIRM] = { |
1198 | .op_func = (nfsd4op_func)nfsd4_open_confirm, |
1199 | .op_name = "OP_OPEN_CONFIRM", |
1200 | }, |
1201 | [OP_OPEN_DOWNGRADE] = { |
1202 | .op_func = (nfsd4op_func)nfsd4_open_downgrade, |
1203 | .op_name = "OP_OPEN_DOWNGRADE", |
1204 | }, |
1205 | [OP_PUTFH] = { |
1206 | .op_func = (nfsd4op_func)nfsd4_putfh, |
1207 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1208 | .op_name = "OP_PUTFH", |
1209 | }, |
1210 | [OP_PUTPUBFH] = { |
1211 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
1212 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1213 | .op_name = "OP_PUTPUBFH", |
1214 | }, |
1215 | [OP_PUTROOTFH] = { |
1216 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
1217 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1218 | .op_name = "OP_PUTROOTFH", |
1219 | }, |
1220 | [OP_READ] = { |
1221 | .op_func = (nfsd4op_func)nfsd4_read, |
1222 | .op_name = "OP_READ", |
1223 | }, |
1224 | [OP_READDIR] = { |
1225 | .op_func = (nfsd4op_func)nfsd4_readdir, |
1226 | .op_name = "OP_READDIR", |
1227 | }, |
1228 | [OP_READLINK] = { |
1229 | .op_func = (nfsd4op_func)nfsd4_readlink, |
1230 | .op_name = "OP_READLINK", |
1231 | }, |
1232 | [OP_REMOVE] = { |
1233 | .op_func = (nfsd4op_func)nfsd4_remove, |
1234 | .op_name = "OP_REMOVE", |
1235 | }, |
1236 | [OP_RENAME] = { |
1237 | .op_name = "OP_RENAME", |
1238 | .op_func = (nfsd4op_func)nfsd4_rename, |
1239 | }, |
1240 | [OP_RENEW] = { |
1241 | .op_func = (nfsd4op_func)nfsd4_renew, |
1242 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1243 | .op_name = "OP_RENEW", |
1244 | }, |
1245 | [OP_RESTOREFH] = { |
1246 | .op_func = (nfsd4op_func)nfsd4_restorefh, |
1247 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1248 | .op_name = "OP_RESTOREFH", |
1249 | }, |
1250 | [OP_SAVEFH] = { |
1251 | .op_func = (nfsd4op_func)nfsd4_savefh, |
1252 | .op_name = "OP_SAVEFH", |
1253 | }, |
1254 | [OP_SECINFO] = { |
1255 | .op_func = (nfsd4op_func)nfsd4_secinfo, |
1256 | .op_name = "OP_SECINFO", |
1257 | }, |
1258 | [OP_SETATTR] = { |
1259 | .op_func = (nfsd4op_func)nfsd4_setattr, |
1260 | .op_name = "OP_SETATTR", |
1261 | }, |
1262 | [OP_SETCLIENTID] = { |
1263 | .op_func = (nfsd4op_func)nfsd4_setclientid, |
1264 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1265 | .op_name = "OP_SETCLIENTID", |
1266 | }, |
1267 | [OP_SETCLIENTID_CONFIRM] = { |
1268 | .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, |
1269 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1270 | .op_name = "OP_SETCLIENTID_CONFIRM", |
1271 | }, |
1272 | [OP_VERIFY] = { |
1273 | .op_func = (nfsd4op_func)nfsd4_verify, |
1274 | .op_name = "OP_VERIFY", |
1275 | }, |
1276 | [OP_WRITE] = { |
1277 | .op_func = (nfsd4op_func)nfsd4_write, |
1278 | .op_name = "OP_WRITE", |
1279 | }, |
1280 | [OP_RELEASE_LOCKOWNER] = { |
1281 | .op_func = (nfsd4op_func)nfsd4_release_lockowner, |
1282 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
1283 | .op_name = "OP_RELEASE_LOCKOWNER", |
1284 | }, |
1285 | |
1286 | /* NFSv4.1 operations */ |
1287 | [OP_EXCHANGE_ID] = { |
1288 | .op_func = (nfsd4op_func)nfsd4_exchange_id, |
1289 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
1290 | .op_name = "OP_EXCHANGE_ID", |
1291 | }, |
1292 | [OP_CREATE_SESSION] = { |
1293 | .op_func = (nfsd4op_func)nfsd4_create_session, |
1294 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
1295 | .op_name = "OP_CREATE_SESSION", |
1296 | }, |
1297 | [OP_DESTROY_SESSION] = { |
1298 | .op_func = (nfsd4op_func)nfsd4_destroy_session, |
1299 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
1300 | .op_name = "OP_DESTROY_SESSION", |
1301 | }, |
1302 | [OP_SEQUENCE] = { |
1303 | .op_func = (nfsd4op_func)nfsd4_sequence, |
1304 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
1305 | .op_name = "OP_SEQUENCE", |
1306 | }, |
1307 | }; |
1308 | |
1309 | static const char *nfsd4_op_name(unsigned opnum) |
1310 | { |
1311 | if (opnum < ARRAY_SIZE(nfsd4_ops)) |
1312 | return nfsd4_ops[opnum].op_name; |
1313 | return "unknown_operation"; |
1314 | } |
1315 | |
1316 | #define nfsd4_voidres nfsd4_voidargs |
1317 | struct nfsd4_voidargs { int dummy; }; |
1318 | |
1319 | /* |
1320 | * TODO: At the present time, the NFSv4 server does not do XID caching |
1321 | * of requests. Implementing XID caching would not be a serious problem, |
1322 | * although it would require a mild change in interfaces since one |
1323 | * doesn't know whether an NFSv4 request is idempotent until after the |
1324 | * XDR decode. However, XID caching totally confuses pynfs (Peter |
1325 | * Astrand's regression testsuite for NFSv4 servers), which reuses |
1326 | * XID's liberally, so I've left it unimplemented until pynfs generates |
1327 | * better XID's. |
1328 | */ |
1329 | static struct svc_procedure nfsd_procedures4[2] = { |
1330 | [NFSPROC4_NULL] = { |
1331 | .pc_func = (svc_procfunc) nfsd4_proc_null, |
1332 | .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, |
1333 | .pc_argsize = sizeof(struct nfsd4_voidargs), |
1334 | .pc_ressize = sizeof(struct nfsd4_voidres), |
1335 | .pc_cachetype = RC_NOCACHE, |
1336 | .pc_xdrressize = 1, |
1337 | }, |
1338 | [NFSPROC4_COMPOUND] = { |
1339 | .pc_func = (svc_procfunc) nfsd4_proc_compound, |
1340 | .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, |
1341 | .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, |
1342 | .pc_argsize = sizeof(struct nfsd4_compoundargs), |
1343 | .pc_ressize = sizeof(struct nfsd4_compoundres), |
1344 | .pc_cachetype = RC_NOCACHE, |
1345 | .pc_xdrressize = NFSD_BUFSIZE/4, |
1346 | }, |
1347 | }; |
1348 | |
1349 | struct svc_version nfsd_version4 = { |
1350 | .vs_vers = 4, |
1351 | .vs_nproc = 2, |
1352 | .vs_proc = nfsd_procedures4, |
1353 | .vs_dispatch = nfsd_dispatch, |
1354 | .vs_xdrsize = NFS4_SVC_XDRSIZE, |
1355 | }; |
1356 | |
1357 | /* |
1358 | * Local variables: |
1359 | * c-basic-offset: 8 |
1360 | * End: |
1361 | */ |
1362 |
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