Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Server-side procedures for NFSv4. |
3 | * | |
4 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <andros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
1da177e4 | 34 | */ |
7e06b7f9 | 35 | #include <linux/file.h> |
1da177e4 | 36 | |
9a74af21 BH |
37 | #include "cache.h" |
38 | #include "xdr4.h" | |
0a3adade | 39 | #include "vfs.h" |
1da177e4 LT |
40 | |
41 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
42 | ||
3c8e0316 YZ |
43 | static u32 nfsd_attrmask[] = { |
44 | NFSD_WRITEABLE_ATTRS_WORD0, | |
45 | NFSD_WRITEABLE_ATTRS_WORD1, | |
46 | NFSD_WRITEABLE_ATTRS_WORD2 | |
47 | }; | |
48 | ||
49 | static u32 nfsd41_ex_attrmask[] = { | |
50 | NFSD_SUPPATTR_EXCLCREAT_WORD0, | |
51 | NFSD_SUPPATTR_EXCLCREAT_WORD1, | |
52 | NFSD_SUPPATTR_EXCLCREAT_WORD2 | |
53 | }; | |
54 | ||
55 | static __be32 | |
56 | check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
57 | u32 *bmval, u32 *writable) | |
58 | { | |
59 | struct dentry *dentry = cstate->current_fh.fh_dentry; | |
3c8e0316 YZ |
60 | |
61 | /* | |
62 | * Check about attributes are supported by the NFSv4 server or not. | |
63 | * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. | |
64 | */ | |
65 | if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || | |
66 | (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || | |
67 | (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) | |
68 | return nfserr_attrnotsupp; | |
69 | ||
70 | /* | |
a06b1261 | 71 | * Check FATTR4_WORD0_ACL can be supported |
3c8e0316 YZ |
72 | * in current environment or not. |
73 | */ | |
74 | if (bmval[0] & FATTR4_WORD0_ACL) { | |
75 | if (!IS_POSIXACL(dentry->d_inode)) | |
76 | return nfserr_attrnotsupp; | |
77 | } | |
3c8e0316 YZ |
78 | |
79 | /* | |
80 | * According to spec, read-only attributes return ERR_INVAL. | |
81 | */ | |
82 | if (writable) { | |
83 | if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || | |
84 | (bmval[2] & ~writable[2])) | |
85 | return nfserr_inval; | |
86 | } | |
87 | ||
88 | return nfs_ok; | |
89 | } | |
90 | ||
91 | static __be32 | |
92 | nfsd4_check_open_attributes(struct svc_rqst *rqstp, | |
93 | struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
94 | { | |
95 | __be32 status = nfs_ok; | |
96 | ||
97 | if (open->op_create == NFS4_OPEN_CREATE) { | |
98 | if (open->op_createmode == NFS4_CREATE_UNCHECKED | |
99 | || open->op_createmode == NFS4_CREATE_GUARDED) | |
100 | status = check_attr_support(rqstp, cstate, | |
101 | open->op_bmval, nfsd_attrmask); | |
102 | else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) | |
103 | status = check_attr_support(rqstp, cstate, | |
104 | open->op_bmval, nfsd41_ex_attrmask); | |
105 | } | |
106 | ||
107 | return status; | |
108 | } | |
109 | ||
9208faf2 YZ |
110 | static int |
111 | is_create_with_attrs(struct nfsd4_open *open) | |
112 | { | |
113 | return open->op_create == NFS4_OPEN_CREATE | |
114 | && (open->op_createmode == NFS4_CREATE_UNCHECKED | |
115 | || open->op_createmode == NFS4_CREATE_GUARDED | |
116 | || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); | |
117 | } | |
118 | ||
119 | /* | |
120 | * if error occurs when setting the acl, just clear the acl bit | |
121 | * in the returned attr bitmap. | |
122 | */ | |
123 | static void | |
124 | do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, | |
125 | struct nfs4_acl *acl, u32 *bmval) | |
126 | { | |
127 | __be32 status; | |
128 | ||
129 | status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); | |
130 | if (status) | |
131 | /* | |
132 | * We should probably fail the whole open at this point, | |
133 | * but we've already created the file, so it's too late; | |
134 | * So this seems the least of evils: | |
135 | */ | |
136 | bmval[0] &= ~FATTR4_WORD0_ACL; | |
137 | } | |
138 | ||
1da177e4 LT |
139 | static inline void |
140 | fh_dup2(struct svc_fh *dst, struct svc_fh *src) | |
141 | { | |
142 | fh_put(dst); | |
143 | dget(src->fh_dentry); | |
144 | if (src->fh_export) | |
145 | cache_get(&src->fh_export->h); | |
146 | *dst = *src; | |
147 | } | |
148 | ||
b37ad28b | 149 | static __be32 |
dc730e17 | 150 | do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) |
1da177e4 | 151 | { |
b37ad28b | 152 | __be32 status; |
1da177e4 LT |
153 | |
154 | if (open->op_truncate && | |
155 | !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
156 | return nfserr_inval; | |
157 | ||
1da177e4 | 158 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 159 | accmode |= NFSD_MAY_READ; |
9801d8a3 | 160 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 161 | accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); |
57ecb34f | 162 | if (open->op_share_deny & NFS4_SHARE_DENY_READ) |
8837abca | 163 | accmode |= NFSD_MAY_WRITE; |
1da177e4 LT |
164 | |
165 | status = fh_verify(rqstp, current_fh, S_IFREG, accmode); | |
166 | ||
167 | return status; | |
168 | } | |
169 | ||
b37ad28b | 170 | static __be32 |
1da177e4 LT |
171 | do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
172 | { | |
173 | struct svc_fh resfh; | |
b37ad28b | 174 | __be32 status; |
81ac95c5 | 175 | int created = 0; |
1da177e4 LT |
176 | |
177 | fh_init(&resfh, NFS4_FHSIZE); | |
178 | open->op_truncate = 0; | |
179 | ||
180 | if (open->op_create) { | |
79fb54ab BH |
181 | /* FIXME: check session persistence and pnfs flags. |
182 | * The nfsv4.1 spec requires the following semantics: | |
183 | * | |
184 | * Persistent | pNFS | Server REQUIRED | Client Allowed | |
185 | * Reply Cache | server | | | |
186 | * -------------+--------+-----------------+-------------------- | |
187 | * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 | |
188 | * | | | (SHOULD) | |
189 | * | | and EXCLUSIVE4 | or EXCLUSIVE4 | |
190 | * | | | (SHOULD NOT) | |
191 | * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 | |
192 | * yes | no | GUARDED4 | GUARDED4 | |
193 | * yes | yes | GUARDED4 | GUARDED4 | |
194 | */ | |
195 | ||
1da177e4 LT |
196 | /* |
197 | * Note: create modes (UNCHECKED,GUARDED...) are the same | |
198 | * in NFSv4 as in v3. | |
199 | */ | |
200 | status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, | |
201 | open->op_fname.len, &open->op_iattr, | |
202 | &resfh, open->op_createmode, | |
749997e5 JL |
203 | (u32 *)open->op_verf.data, |
204 | &open->op_truncate, &created); | |
205 | ||
99f88726 BF |
206 | /* |
207 | * Following rfc 3530 14.2.16, use the returned bitmask | |
208 | * to indicate which attributes we used to store the | |
209 | * verifier: | |
749997e5 JL |
210 | */ |
211 | if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) | |
99f88726 | 212 | open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | |
749997e5 | 213 | FATTR4_WORD1_TIME_MODIFY); |
af85852d | 214 | } else { |
1da177e4 LT |
215 | status = nfsd_lookup(rqstp, current_fh, |
216 | open->op_fname.data, open->op_fname.len, &resfh); | |
217 | fh_unlock(current_fh); | |
218 | } | |
af85852d BF |
219 | if (status) |
220 | goto out; | |
1da177e4 | 221 | |
9208faf2 YZ |
222 | if (is_create_with_attrs(open) && open->op_acl != NULL) |
223 | do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); | |
224 | ||
af85852d | 225 | set_change_info(&open->op_cinfo, current_fh); |
13024b7b | 226 | fh_dup2(current_fh, &resfh); |
1da177e4 | 227 | |
af85852d | 228 | /* set reply cache */ |
a4773c08 BF |
229 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
230 | &resfh.fh_handle); | |
81ac95c5 | 231 | if (!created) |
8837abca MS |
232 | status = do_open_permission(rqstp, current_fh, open, |
233 | NFSD_MAY_NOP); | |
1da177e4 | 234 | |
af85852d | 235 | out: |
1da177e4 LT |
236 | fh_put(&resfh); |
237 | return status; | |
238 | } | |
239 | ||
b37ad28b | 240 | static __be32 |
1da177e4 LT |
241 | do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
242 | { | |
b37ad28b | 243 | __be32 status; |
1da177e4 LT |
244 | |
245 | /* Only reclaims from previously confirmed clients are valid */ | |
246 | if ((status = nfs4_check_open_reclaim(&open->op_clientid))) | |
247 | return status; | |
248 | ||
249 | /* We don't know the target directory, and therefore can not | |
250 | * set the change info | |
251 | */ | |
252 | ||
253 | memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); | |
254 | ||
255 | /* set replay cache */ | |
a4773c08 BF |
256 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
257 | ¤t_fh->fh_handle); | |
1da177e4 LT |
258 | |
259 | open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && | |
260 | (open->op_iattr.ia_size == 0); | |
261 | ||
8837abca MS |
262 | status = do_open_permission(rqstp, current_fh, open, |
263 | NFSD_MAY_OWNER_OVERRIDE); | |
1da177e4 LT |
264 | |
265 | return status; | |
266 | } | |
267 | ||
60adfc50 AA |
268 | static void |
269 | copy_clientid(clientid_t *clid, struct nfsd4_session *session) | |
270 | { | |
271 | struct nfsd4_sessionid *sid = | |
272 | (struct nfsd4_sessionid *)session->se_sessionid.data; | |
273 | ||
274 | clid->cl_boot = sid->clientid.cl_boot; | |
275 | clid->cl_id = sid->clientid.cl_id; | |
276 | } | |
1da177e4 | 277 | |
7191155b | 278 | static __be32 |
ca364317 | 279 | nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 280 | struct nfsd4_open *open) |
1da177e4 | 281 | { |
b37ad28b | 282 | __be32 status; |
6668958f AA |
283 | struct nfsd4_compoundres *resp; |
284 | ||
1da177e4 LT |
285 | dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", |
286 | (int)open->op_fname.len, open->op_fname.data, | |
287 | open->op_stateowner); | |
288 | ||
1da177e4 LT |
289 | /* This check required by spec. */ |
290 | if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) | |
291 | return nfserr_inval; | |
292 | ||
60adfc50 AA |
293 | if (nfsd4_has_session(cstate)) |
294 | copy_clientid(&open->op_clientid, cstate->session); | |
295 | ||
1da177e4 LT |
296 | nfs4_lock_state(); |
297 | ||
298 | /* check seqid for replay. set nfs4_owner */ | |
6668958f AA |
299 | resp = rqstp->rq_resp; |
300 | status = nfsd4_process_open1(&resp->cstate, open); | |
a90b061c | 301 | if (status == nfserr_replay_me) { |
1da177e4 | 302 | struct nfs4_replay *rp = &open->op_stateowner->so_replay; |
ca364317 | 303 | fh_put(&cstate->current_fh); |
a4773c08 BF |
304 | fh_copy_shallow(&cstate->current_fh.fh_handle, |
305 | &rp->rp_openfh); | |
8837abca | 306 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
307 | if (status) |
308 | dprintk("nfsd4_open: replay failed" | |
309 | " restoring previous filehandle\n"); | |
310 | else | |
a90b061c | 311 | status = nfserr_replay_me; |
1da177e4 LT |
312 | } |
313 | if (status) | |
314 | goto out; | |
fb553c0f | 315 | |
3c8e0316 YZ |
316 | status = nfsd4_check_open_attributes(rqstp, cstate, open); |
317 | if (status) | |
318 | goto out; | |
319 | ||
fb553c0f BF |
320 | /* Openowner is now set, so sequence id will get bumped. Now we need |
321 | * these checks before we do any creates: */ | |
cbd0d51a | 322 | status = nfserr_grace; |
af558e33 | 323 | if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a BF |
324 | goto out; |
325 | status = nfserr_no_grace; | |
af558e33 | 326 | if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a | 327 | goto out; |
fb553c0f | 328 | |
1da177e4 | 329 | switch (open->op_claim_type) { |
0dd3c192 | 330 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
1da177e4 LT |
331 | case NFS4_OPEN_CLAIM_NULL: |
332 | /* | |
333 | * (1) set CURRENT_FH to the file being opened, | |
334 | * creating it if necessary, (2) set open->op_cinfo, | |
335 | * (3) set open->op_truncate if the file is to be | |
336 | * truncated after opening, (4) do permission checking. | |
337 | */ | |
ca364317 BF |
338 | status = do_open_lookup(rqstp, &cstate->current_fh, |
339 | open); | |
1da177e4 LT |
340 | if (status) |
341 | goto out; | |
342 | break; | |
343 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
a525825d | 344 | open->op_stateowner->so_confirmed = 1; |
1da177e4 LT |
345 | /* |
346 | * The CURRENT_FH is already set to the file being | |
347 | * opened. (1) set open->op_cinfo, (2) set | |
348 | * open->op_truncate if the file is to be truncated | |
349 | * after opening, (3) do permission checking. | |
350 | */ | |
ca364317 BF |
351 | status = do_open_fhandle(rqstp, &cstate->current_fh, |
352 | open); | |
1da177e4 LT |
353 | if (status) |
354 | goto out; | |
355 | break; | |
1da177e4 | 356 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
a525825d | 357 | open->op_stateowner->so_confirmed = 1; |
2fdada03 | 358 | dprintk("NFSD: unsupported OPEN claim type %d\n", |
1da177e4 LT |
359 | open->op_claim_type); |
360 | status = nfserr_notsupp; | |
361 | goto out; | |
362 | default: | |
2fdada03 | 363 | dprintk("NFSD: Invalid OPEN claim type %d\n", |
1da177e4 LT |
364 | open->op_claim_type); |
365 | status = nfserr_inval; | |
366 | goto out; | |
367 | } | |
368 | /* | |
369 | * nfsd4_process_open2() does the actual opening of the file. If | |
370 | * successful, it (1) truncates the file if open->op_truncate was | |
371 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. | |
372 | */ | |
ca364317 | 373 | status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); |
1da177e4 | 374 | out: |
f2327d9a | 375 | if (open->op_stateowner) { |
1da177e4 | 376 | nfs4_get_stateowner(open->op_stateowner); |
a4f1706a | 377 | cstate->replay_owner = open->op_stateowner; |
f2327d9a | 378 | } |
1da177e4 LT |
379 | nfs4_unlock_state(); |
380 | return status; | |
381 | } | |
382 | ||
383 | /* | |
384 | * filehandle-manipulating ops. | |
385 | */ | |
7191155b | 386 | static __be32 |
b591480b BF |
387 | nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
388 | struct svc_fh **getfh) | |
1da177e4 | 389 | { |
ca364317 | 390 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
391 | return nfserr_nofilehandle; |
392 | ||
ca364317 | 393 | *getfh = &cstate->current_fh; |
1da177e4 LT |
394 | return nfs_ok; |
395 | } | |
396 | ||
7191155b | 397 | static __be32 |
ca364317 BF |
398 | nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
399 | struct nfsd4_putfh *putfh) | |
1da177e4 | 400 | { |
ca364317 BF |
401 | fh_put(&cstate->current_fh); |
402 | cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; | |
403 | memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, | |
404 | putfh->pf_fhlen); | |
8837abca | 405 | return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
406 | } |
407 | ||
7191155b | 408 | static __be32 |
b591480b BF |
409 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
410 | void *arg) | |
1da177e4 | 411 | { |
b37ad28b | 412 | __be32 status; |
1da177e4 | 413 | |
ca364317 | 414 | fh_put(&cstate->current_fh); |
df547efb | 415 | status = exp_pseudoroot(rqstp, &cstate->current_fh); |
1da177e4 LT |
416 | return status; |
417 | } | |
418 | ||
7191155b | 419 | static __be32 |
b591480b BF |
420 | nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
421 | void *arg) | |
1da177e4 | 422 | { |
ca364317 | 423 | if (!cstate->save_fh.fh_dentry) |
1da177e4 LT |
424 | return nfserr_restorefh; |
425 | ||
ca364317 | 426 | fh_dup2(&cstate->current_fh, &cstate->save_fh); |
1da177e4 LT |
427 | return nfs_ok; |
428 | } | |
429 | ||
7191155b | 430 | static __be32 |
b591480b BF |
431 | nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
432 | void *arg) | |
1da177e4 | 433 | { |
ca364317 | 434 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
435 | return nfserr_nofilehandle; |
436 | ||
ca364317 | 437 | fh_dup2(&cstate->save_fh, &cstate->current_fh); |
1da177e4 LT |
438 | return nfs_ok; |
439 | } | |
440 | ||
441 | /* | |
442 | * misc nfsv4 ops | |
443 | */ | |
7191155b | 444 | static __be32 |
ca364317 BF |
445 | nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
446 | struct nfsd4_access *access) | |
1da177e4 LT |
447 | { |
448 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) | |
449 | return nfserr_inval; | |
450 | ||
451 | access->ac_resp_access = access->ac_req_access; | |
ca364317 BF |
452 | return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
453 | &access->ac_supported); | |
1da177e4 LT |
454 | } |
455 | ||
7191155b | 456 | static __be32 |
ca364317 BF |
457 | nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
458 | struct nfsd4_commit *commit) | |
1da177e4 | 459 | { |
b37ad28b | 460 | __be32 status; |
1da177e4 LT |
461 | |
462 | u32 *p = (u32 *)commit->co_verf.data; | |
463 | *p++ = nfssvc_boot.tv_sec; | |
464 | *p++ = nfssvc_boot.tv_usec; | |
465 | ||
ca364317 BF |
466 | status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
467 | commit->co_count); | |
1da177e4 LT |
468 | if (status == nfserr_symlink) |
469 | status = nfserr_inval; | |
470 | return status; | |
471 | } | |
472 | ||
b37ad28b | 473 | static __be32 |
ca364317 BF |
474 | nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
475 | struct nfsd4_create *create) | |
1da177e4 LT |
476 | { |
477 | struct svc_fh resfh; | |
b37ad28b | 478 | __be32 status; |
1da177e4 LT |
479 | dev_t rdev; |
480 | ||
481 | fh_init(&resfh, NFS4_FHSIZE); | |
482 | ||
8837abca MS |
483 | status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, |
484 | NFSD_MAY_CREATE); | |
1da177e4 LT |
485 | if (status == nfserr_symlink) |
486 | status = nfserr_notdir; | |
487 | if (status) | |
488 | return status; | |
489 | ||
3c8e0316 YZ |
490 | status = check_attr_support(rqstp, cstate, create->cr_bmval, |
491 | nfsd_attrmask); | |
492 | if (status) | |
493 | return status; | |
494 | ||
1da177e4 LT |
495 | switch (create->cr_type) { |
496 | case NF4LNK: | |
497 | /* ugh! we have to null-terminate the linktext, or | |
498 | * vfs_symlink() will choke. it is always safe to | |
499 | * null-terminate by brute force, since at worst we | |
500 | * will overwrite the first byte of the create namelen | |
501 | * in the XDR buffer, which has already been extracted | |
502 | * during XDR decode. | |
503 | */ | |
504 | create->cr_linkname[create->cr_linklen] = 0; | |
505 | ||
ca364317 BF |
506 | status = nfsd_symlink(rqstp, &cstate->current_fh, |
507 | create->cr_name, create->cr_namelen, | |
508 | create->cr_linkname, create->cr_linklen, | |
509 | &resfh, &create->cr_iattr); | |
1da177e4 LT |
510 | break; |
511 | ||
512 | case NF4BLK: | |
513 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
514 | if (MAJOR(rdev) != create->cr_specdata1 || | |
515 | MINOR(rdev) != create->cr_specdata2) | |
516 | return nfserr_inval; | |
ca364317 BF |
517 | status = nfsd_create(rqstp, &cstate->current_fh, |
518 | create->cr_name, create->cr_namelen, | |
519 | &create->cr_iattr, S_IFBLK, rdev, &resfh); | |
1da177e4 LT |
520 | break; |
521 | ||
522 | case NF4CHR: | |
523 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
524 | if (MAJOR(rdev) != create->cr_specdata1 || | |
525 | MINOR(rdev) != create->cr_specdata2) | |
526 | return nfserr_inval; | |
ca364317 BF |
527 | status = nfsd_create(rqstp, &cstate->current_fh, |
528 | create->cr_name, create->cr_namelen, | |
529 | &create->cr_iattr,S_IFCHR, rdev, &resfh); | |
1da177e4 LT |
530 | break; |
531 | ||
532 | case NF4SOCK: | |
ca364317 BF |
533 | status = nfsd_create(rqstp, &cstate->current_fh, |
534 | create->cr_name, create->cr_namelen, | |
535 | &create->cr_iattr, S_IFSOCK, 0, &resfh); | |
1da177e4 LT |
536 | break; |
537 | ||
538 | case NF4FIFO: | |
ca364317 BF |
539 | status = nfsd_create(rqstp, &cstate->current_fh, |
540 | create->cr_name, create->cr_namelen, | |
541 | &create->cr_iattr, S_IFIFO, 0, &resfh); | |
1da177e4 LT |
542 | break; |
543 | ||
544 | case NF4DIR: | |
545 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; | |
ca364317 BF |
546 | status = nfsd_create(rqstp, &cstate->current_fh, |
547 | create->cr_name, create->cr_namelen, | |
548 | &create->cr_iattr, S_IFDIR, 0, &resfh); | |
1da177e4 LT |
549 | break; |
550 | ||
551 | default: | |
552 | status = nfserr_badtype; | |
553 | } | |
554 | ||
9208faf2 YZ |
555 | if (status) |
556 | goto out; | |
1da177e4 | 557 | |
9208faf2 YZ |
558 | if (create->cr_acl != NULL) |
559 | do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, | |
560 | create->cr_bmval); | |
561 | ||
562 | fh_unlock(&cstate->current_fh); | |
563 | set_change_info(&create->cr_cinfo, &cstate->current_fh); | |
564 | fh_dup2(&cstate->current_fh, &resfh); | |
565 | out: | |
1da177e4 LT |
566 | fh_put(&resfh); |
567 | return status; | |
568 | } | |
569 | ||
7191155b | 570 | static __be32 |
ca364317 BF |
571 | nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
572 | struct nfsd4_getattr *getattr) | |
1da177e4 | 573 | { |
b37ad28b | 574 | __be32 status; |
1da177e4 | 575 | |
8837abca | 576 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
577 | if (status) |
578 | return status; | |
579 | ||
580 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
581 | return nfserr_inval; | |
582 | ||
7e705706 AA |
583 | getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
584 | getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); | |
585 | getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); | |
1da177e4 | 586 | |
ca364317 | 587 | getattr->ga_fhp = &cstate->current_fh; |
1da177e4 LT |
588 | return nfs_ok; |
589 | } | |
590 | ||
7191155b | 591 | static __be32 |
ca364317 BF |
592 | nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
593 | struct nfsd4_link *link) | |
1da177e4 | 594 | { |
b37ad28b | 595 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 596 | |
ca364317 | 597 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 598 | return status; |
ca364317 BF |
599 | status = nfsd_link(rqstp, &cstate->current_fh, |
600 | link->li_name, link->li_namelen, &cstate->save_fh); | |
1da177e4 | 601 | if (!status) |
ca364317 | 602 | set_change_info(&link->li_cinfo, &cstate->current_fh); |
1da177e4 LT |
603 | return status; |
604 | } | |
605 | ||
b37ad28b | 606 | static __be32 |
b591480b BF |
607 | nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
608 | void *arg) | |
1da177e4 LT |
609 | { |
610 | struct svc_fh tmp_fh; | |
b37ad28b | 611 | __be32 ret; |
1da177e4 LT |
612 | |
613 | fh_init(&tmp_fh, NFS4_FHSIZE); | |
df547efb BF |
614 | ret = exp_pseudoroot(rqstp, &tmp_fh); |
615 | if (ret) | |
1da177e4 | 616 | return ret; |
ca364317 | 617 | if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { |
1da177e4 LT |
618 | fh_put(&tmp_fh); |
619 | return nfserr_noent; | |
620 | } | |
621 | fh_put(&tmp_fh); | |
ca364317 BF |
622 | return nfsd_lookup(rqstp, &cstate->current_fh, |
623 | "..", 2, &cstate->current_fh); | |
1da177e4 LT |
624 | } |
625 | ||
7191155b | 626 | static __be32 |
ca364317 BF |
627 | nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
628 | struct nfsd4_lookup *lookup) | |
1da177e4 | 629 | { |
ca364317 BF |
630 | return nfsd_lookup(rqstp, &cstate->current_fh, |
631 | lookup->lo_name, lookup->lo_len, | |
632 | &cstate->current_fh); | |
1da177e4 LT |
633 | } |
634 | ||
7191155b | 635 | static __be32 |
ca364317 BF |
636 | nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
637 | struct nfsd4_read *read) | |
1da177e4 | 638 | { |
b37ad28b | 639 | __be32 status; |
1da177e4 LT |
640 | |
641 | /* no need to check permission - this will be done in nfsd_read() */ | |
642 | ||
7e06b7f9 | 643 | read->rd_filp = NULL; |
1da177e4 LT |
644 | if (read->rd_offset >= OFFSET_MAX) |
645 | return nfserr_inval; | |
646 | ||
647 | nfs4_lock_state(); | |
648 | /* check stateid */ | |
dd453dfd BH |
649 | if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, |
650 | RD_STATE, &read->rd_filp))) { | |
1da177e4 LT |
651 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
652 | goto out; | |
653 | } | |
7e06b7f9 N |
654 | if (read->rd_filp) |
655 | get_file(read->rd_filp); | |
1da177e4 LT |
656 | status = nfs_ok; |
657 | out: | |
658 | nfs4_unlock_state(); | |
659 | read->rd_rqstp = rqstp; | |
ca364317 | 660 | read->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
661 | return status; |
662 | } | |
663 | ||
7191155b | 664 | static __be32 |
ca364317 BF |
665 | nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
666 | struct nfsd4_readdir *readdir) | |
1da177e4 LT |
667 | { |
668 | u64 cookie = readdir->rd_cookie; | |
669 | static const nfs4_verifier zeroverf; | |
670 | ||
671 | /* no need to check permission - this will be done in nfsd_readdir() */ | |
672 | ||
673 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
674 | return nfserr_inval; | |
675 | ||
7e705706 AA |
676 | readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
677 | readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); | |
678 | readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); | |
1da177e4 LT |
679 | |
680 | if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || | |
681 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) | |
682 | return nfserr_bad_cookie; | |
683 | ||
684 | readdir->rd_rqstp = rqstp; | |
ca364317 | 685 | readdir->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
686 | return nfs_ok; |
687 | } | |
688 | ||
7191155b | 689 | static __be32 |
ca364317 BF |
690 | nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
691 | struct nfsd4_readlink *readlink) | |
1da177e4 LT |
692 | { |
693 | readlink->rl_rqstp = rqstp; | |
ca364317 | 694 | readlink->rl_fhp = &cstate->current_fh; |
1da177e4 LT |
695 | return nfs_ok; |
696 | } | |
697 | ||
7191155b | 698 | static __be32 |
ca364317 BF |
699 | nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
700 | struct nfsd4_remove *remove) | |
1da177e4 | 701 | { |
b37ad28b | 702 | __be32 status; |
1da177e4 | 703 | |
af558e33 | 704 | if (locks_in_grace()) |
c815afc7 | 705 | return nfserr_grace; |
ca364317 BF |
706 | status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
707 | remove->rm_name, remove->rm_namelen); | |
1da177e4 LT |
708 | if (status == nfserr_symlink) |
709 | return nfserr_notdir; | |
710 | if (!status) { | |
ca364317 BF |
711 | fh_unlock(&cstate->current_fh); |
712 | set_change_info(&remove->rm_cinfo, &cstate->current_fh); | |
1da177e4 LT |
713 | } |
714 | return status; | |
715 | } | |
716 | ||
7191155b | 717 | static __be32 |
ca364317 BF |
718 | nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
719 | struct nfsd4_rename *rename) | |
1da177e4 | 720 | { |
b37ad28b | 721 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 722 | |
ca364317 | 723 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 724 | return status; |
af558e33 | 725 | if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags |
c815afc7 N |
726 | & NFSEXP_NOSUBTREECHECK)) |
727 | return nfserr_grace; | |
ca364317 BF |
728 | status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
729 | rename->rn_snamelen, &cstate->current_fh, | |
1da177e4 LT |
730 | rename->rn_tname, rename->rn_tnamelen); |
731 | ||
732 | /* the underlying filesystem returns different error's than required | |
733 | * by NFSv4. both save_fh and current_fh have been verified.. */ | |
734 | if (status == nfserr_isdir) | |
735 | status = nfserr_exist; | |
736 | else if ((status == nfserr_notdir) && | |
ca364317 BF |
737 | (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && |
738 | S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) | |
1da177e4 LT |
739 | status = nfserr_exist; |
740 | else if (status == nfserr_symlink) | |
741 | status = nfserr_notdir; | |
742 | ||
743 | if (!status) { | |
ca364317 BF |
744 | set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
745 | set_change_info(&rename->rn_tinfo, &cstate->save_fh); | |
1da177e4 LT |
746 | } |
747 | return status; | |
748 | } | |
749 | ||
dcb488a3 AA |
750 | static __be32 |
751 | nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
752 | struct nfsd4_secinfo *secinfo) | |
753 | { | |
754 | struct svc_fh resfh; | |
755 | struct svc_export *exp; | |
756 | struct dentry *dentry; | |
757 | __be32 err; | |
758 | ||
759 | fh_init(&resfh, NFS4_FHSIZE); | |
760 | err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, | |
761 | secinfo->si_name, secinfo->si_namelen, | |
762 | &exp, &dentry); | |
763 | if (err) | |
764 | return err; | |
765 | if (dentry->d_inode == NULL) { | |
766 | exp_put(exp); | |
767 | err = nfserr_noent; | |
768 | } else | |
769 | secinfo->si_exp = exp; | |
770 | dput(dentry); | |
771 | return err; | |
772 | } | |
773 | ||
7191155b | 774 | static __be32 |
ca364317 BF |
775 | nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
776 | struct nfsd4_setattr *setattr) | |
1da177e4 | 777 | { |
b37ad28b | 778 | __be32 status = nfs_ok; |
1da177e4 | 779 | |
1da177e4 LT |
780 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
781 | nfs4_lock_state(); | |
dd453dfd | 782 | status = nfs4_preprocess_stateid_op(cstate, |
6150ef0d | 783 | &setattr->sa_stateid, WR_STATE, NULL); |
1da177e4 | 784 | nfs4_unlock_state(); |
375c5547 | 785 | if (status) { |
3e3b4800 | 786 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
375c5547 BF |
787 | return status; |
788 | } | |
1da177e4 | 789 | } |
18f335af DH |
790 | status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); |
791 | if (status) | |
792 | return status; | |
1da177e4 | 793 | status = nfs_ok; |
3c8e0316 YZ |
794 | |
795 | status = check_attr_support(rqstp, cstate, setattr->sa_bmval, | |
796 | nfsd_attrmask); | |
797 | if (status) | |
798 | goto out; | |
799 | ||
1da177e4 | 800 | if (setattr->sa_acl != NULL) |
ca364317 BF |
801 | status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
802 | setattr->sa_acl); | |
1da177e4 | 803 | if (status) |
18f335af | 804 | goto out; |
ca364317 | 805 | status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
1da177e4 | 806 | 0, (time_t)0); |
18f335af DH |
807 | out: |
808 | mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); | |
1da177e4 LT |
809 | return status; |
810 | } | |
811 | ||
7191155b | 812 | static __be32 |
ca364317 BF |
813 | nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
814 | struct nfsd4_write *write) | |
1da177e4 LT |
815 | { |
816 | stateid_t *stateid = &write->wr_stateid; | |
817 | struct file *filp = NULL; | |
818 | u32 *p; | |
b37ad28b | 819 | __be32 status = nfs_ok; |
31dec253 | 820 | unsigned long cnt; |
1da177e4 LT |
821 | |
822 | /* no need to check permission - this will be done in nfsd_write() */ | |
823 | ||
824 | if (write->wr_offset >= OFFSET_MAX) | |
825 | return nfserr_inval; | |
826 | ||
827 | nfs4_lock_state(); | |
dd453dfd | 828 | status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); |
7e06b7f9 N |
829 | if (filp) |
830 | get_file(filp); | |
1da177e4 LT |
831 | nfs4_unlock_state(); |
832 | ||
375c5547 BF |
833 | if (status) { |
834 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); | |
835 | return status; | |
836 | } | |
837 | ||
31dec253 | 838 | cnt = write->wr_buflen; |
1da177e4 LT |
839 | write->wr_how_written = write->wr_stable_how; |
840 | p = (u32 *)write->wr_verifier.data; | |
841 | *p++ = nfssvc_boot.tv_sec; | |
842 | *p++ = nfssvc_boot.tv_usec; | |
843 | ||
ca364317 BF |
844 | status = nfsd_write(rqstp, &cstate->current_fh, filp, |
845 | write->wr_offset, rqstp->rq_vec, write->wr_vlen, | |
31dec253 | 846 | &cnt, &write->wr_how_written); |
7e06b7f9 N |
847 | if (filp) |
848 | fput(filp); | |
1da177e4 | 849 | |
31dec253 DS |
850 | write->wr_bytes_written = cnt; |
851 | ||
1da177e4 LT |
852 | if (status == nfserr_symlink) |
853 | status = nfserr_inval; | |
854 | return status; | |
1da177e4 LT |
855 | } |
856 | ||
857 | /* This routine never returns NFS_OK! If there are no other errors, it | |
858 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the | |
859 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME | |
860 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. | |
861 | */ | |
b37ad28b | 862 | static __be32 |
c954e2a5 | 863 | _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
ca364317 | 864 | struct nfsd4_verify *verify) |
1da177e4 | 865 | { |
2ebbc012 | 866 | __be32 *buf, *p; |
1da177e4 | 867 | int count; |
b37ad28b | 868 | __be32 status; |
1da177e4 | 869 | |
8837abca | 870 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
871 | if (status) |
872 | return status; | |
873 | ||
3c8e0316 YZ |
874 | status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); |
875 | if (status) | |
876 | return status; | |
877 | ||
1da177e4 LT |
878 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) |
879 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) | |
880 | return nfserr_inval; | |
881 | if (verify->ve_attrlen & 3) | |
882 | return nfserr_inval; | |
883 | ||
884 | /* count in words: | |
885 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 | |
886 | */ | |
887 | count = 4 + (verify->ve_attrlen >> 2); | |
888 | buf = kmalloc(count << 2, GFP_KERNEL); | |
889 | if (!buf) | |
890 | return nfserr_resource; | |
891 | ||
ca364317 BF |
892 | status = nfsd4_encode_fattr(&cstate->current_fh, |
893 | cstate->current_fh.fh_export, | |
894 | cstate->current_fh.fh_dentry, buf, | |
1da177e4 | 895 | &count, verify->ve_bmval, |
406a7ea9 | 896 | rqstp, 0); |
1da177e4 LT |
897 | |
898 | /* this means that nfsd4_encode_fattr() ran out of space */ | |
899 | if (status == nfserr_resource && count == 0) | |
900 | status = nfserr_not_same; | |
901 | if (status) | |
902 | goto out_kfree; | |
903 | ||
95ec28cd BH |
904 | /* skip bitmap */ |
905 | p = buf + 1 + ntohl(buf[0]); | |
1da177e4 LT |
906 | status = nfserr_not_same; |
907 | if (ntohl(*p++) != verify->ve_attrlen) | |
908 | goto out_kfree; | |
909 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) | |
910 | status = nfserr_same; | |
911 | ||
912 | out_kfree: | |
913 | kfree(buf); | |
914 | return status; | |
915 | } | |
916 | ||
c954e2a5 BF |
917 | static __be32 |
918 | nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
919 | struct nfsd4_verify *verify) | |
920 | { | |
921 | __be32 status; | |
922 | ||
923 | status = _nfsd4_verify(rqstp, cstate, verify); | |
924 | return status == nfserr_not_same ? nfs_ok : status; | |
925 | } | |
926 | ||
927 | static __be32 | |
928 | nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
929 | struct nfsd4_verify *verify) | |
930 | { | |
931 | __be32 status; | |
932 | ||
933 | status = _nfsd4_verify(rqstp, cstate, verify); | |
934 | return status == nfserr_same ? nfs_ok : status; | |
935 | } | |
936 | ||
1da177e4 LT |
937 | /* |
938 | * NULL call. | |
939 | */ | |
7111c66e | 940 | static __be32 |
1da177e4 LT |
941 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
942 | { | |
943 | return nfs_ok; | |
944 | } | |
945 | ||
e2b20950 SA |
946 | static inline void nfsd4_increment_op_stats(u32 opnum) |
947 | { | |
948 | if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) | |
949 | nfsdstats.nfs4_opcount[opnum]++; | |
950 | } | |
951 | ||
b591480b BF |
952 | typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
953 | void *); | |
f9bb94c4 AA |
954 | enum nfsd4_op_flags { |
955 | ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ | |
956 | ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ | |
957 | ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ | |
958 | }; | |
b591480b BF |
959 | |
960 | struct nfsd4_operation { | |
961 | nfsd4op_func op_func; | |
962 | u32 op_flags; | |
b001a1b6 | 963 | char *op_name; |
b591480b BF |
964 | }; |
965 | ||
966 | static struct nfsd4_operation nfsd4_ops[]; | |
967 | ||
f1c7f79b | 968 | static const char *nfsd4_op_name(unsigned opnum); |
b001a1b6 | 969 | |
f9bb94c4 AA |
970 | /* |
971 | * Enforce NFSv4.1 COMPOUND ordering rules. | |
972 | * | |
973 | * TODO: | |
974 | * - enforce NFS4ERR_NOT_ONLY_OP, | |
975 | * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. | |
976 | */ | |
977 | static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) | |
978 | { | |
979 | if (args->minorversion && args->opcnt > 0) { | |
980 | struct nfsd4_op *op = &args->ops[0]; | |
981 | return (op->status == nfserr_op_illegal) || | |
982 | (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); | |
983 | } | |
984 | return true; | |
985 | } | |
986 | ||
1da177e4 LT |
987 | /* |
988 | * COMPOUND call. | |
989 | */ | |
7111c66e | 990 | static __be32 |
1da177e4 LT |
991 | nfsd4_proc_compound(struct svc_rqst *rqstp, |
992 | struct nfsd4_compoundargs *args, | |
993 | struct nfsd4_compoundres *resp) | |
994 | { | |
995 | struct nfsd4_op *op; | |
b591480b | 996 | struct nfsd4_operation *opdesc; |
e354d571 | 997 | struct nfsd4_compound_state *cstate = &resp->cstate; |
e5710199 | 998 | int slack_bytes; |
b37ad28b | 999 | __be32 status; |
1da177e4 | 1000 | |
1da177e4 | 1001 | resp->xbuf = &rqstp->rq_res; |
e354d571 AA |
1002 | resp->p = rqstp->rq_res.head[0].iov_base + |
1003 | rqstp->rq_res.head[0].iov_len; | |
1da177e4 LT |
1004 | resp->tagp = resp->p; |
1005 | /* reserve space for: taglen, tag, and opcnt */ | |
1006 | resp->p += 2 + XDR_QUADLEN(args->taglen); | |
1007 | resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; | |
1008 | resp->taglen = args->taglen; | |
1009 | resp->tag = args->tag; | |
1010 | resp->opcnt = 0; | |
1011 | resp->rqstp = rqstp; | |
d87a8ade | 1012 | resp->cstate.minorversion = args->minorversion; |
e354d571 AA |
1013 | resp->cstate.replay_owner = NULL; |
1014 | fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); | |
1015 | fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); | |
2f425878 AA |
1016 | /* Use the deferral mechanism only for NFSv4.0 compounds */ |
1017 | rqstp->rq_usedeferral = (args->minorversion == 0); | |
1da177e4 LT |
1018 | |
1019 | /* | |
1020 | * According to RFC3010, this takes precedence over all other errors. | |
1021 | */ | |
1022 | status = nfserr_minor_vers_mismatch; | |
8daf220a | 1023 | if (args->minorversion > nfsd_supported_minorversion) |
1da177e4 LT |
1024 | goto out; |
1025 | ||
f9bb94c4 AA |
1026 | if (!nfs41_op_ordering_ok(args)) { |
1027 | op = &args->ops[0]; | |
1028 | op->status = nfserr_sequence_pos; | |
1029 | goto encode_op; | |
1030 | } | |
1031 | ||
1da177e4 LT |
1032 | status = nfs_ok; |
1033 | while (!status && resp->opcnt < args->opcnt) { | |
1034 | op = &args->ops[resp->opcnt++]; | |
1035 | ||
b001a1b6 BH |
1036 | dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", |
1037 | resp->opcnt, args->opcnt, op->opnum, | |
1038 | nfsd4_op_name(op->opnum)); | |
1da177e4 LT |
1039 | /* |
1040 | * The XDR decode routines may have pre-set op->status; | |
1041 | * for example, if there is a miscellaneous XDR error | |
1042 | * it will be set to nfserr_bad_xdr. | |
1043 | */ | |
1044 | if (op->status) | |
1045 | goto encode_op; | |
1046 | ||
1047 | /* We must be able to encode a successful response to | |
1048 | * this operation, with enough room left over to encode a | |
1049 | * failed response to the next operation. If we don't | |
1050 | * have enough room, fail with ERR_RESOURCE. | |
1051 | */ | |
e5710199 BF |
1052 | slack_bytes = (char *)resp->end - (char *)resp->p; |
1053 | if (slack_bytes < COMPOUND_SLACK_SPACE | |
1054 | + COMPOUND_ERR_SLACK_SPACE) { | |
1055 | BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); | |
1da177e4 LT |
1056 | op->status = nfserr_resource; |
1057 | goto encode_op; | |
1058 | } | |
1059 | ||
b591480b BF |
1060 | opdesc = &nfsd4_ops[op->opnum]; |
1061 | ||
ca364317 | 1062 | if (!cstate->current_fh.fh_dentry) { |
27d630ec | 1063 | if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
42ca0993 BF |
1064 | op->status = nfserr_nofilehandle; |
1065 | goto encode_op; | |
1066 | } | |
eeac294e BF |
1067 | } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && |
1068 | !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { | |
42ca0993 | 1069 | op->status = nfserr_moved; |
1da177e4 LT |
1070 | goto encode_op; |
1071 | } | |
b591480b BF |
1072 | |
1073 | if (opdesc->op_func) | |
1074 | op->status = opdesc->op_func(rqstp, cstate, &op->u); | |
1075 | else | |
1da177e4 | 1076 | BUG_ON(op->status == nfs_ok); |
1da177e4 LT |
1077 | |
1078 | encode_op: | |
49557cc7 | 1079 | /* Only from SEQUENCE */ |
da3846a2 AA |
1080 | if (resp->cstate.status == nfserr_replay_cache) { |
1081 | dprintk("%s NFS4.1 replay from cache\n", __func__); | |
abfabf8c | 1082 | status = op->status; |
da3846a2 AA |
1083 | goto out; |
1084 | } | |
a90b061c | 1085 | if (op->status == nfserr_replay_me) { |
a4f1706a | 1086 | op->replay = &cstate->replay_owner->so_replay; |
1da177e4 LT |
1087 | nfsd4_encode_replay(resp, op); |
1088 | status = op->status = op->replay->rp_status; | |
1089 | } else { | |
1090 | nfsd4_encode_operation(resp, op); | |
1091 | status = op->status; | |
1092 | } | |
0407717d BH |
1093 | |
1094 | dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", | |
1095 | args->ops, args->opcnt, resp->opcnt, op->opnum, | |
1096 | be32_to_cpu(status)); | |
1097 | ||
a4f1706a BF |
1098 | if (cstate->replay_owner) { |
1099 | nfs4_put_stateowner(cstate->replay_owner); | |
1100 | cstate->replay_owner = NULL; | |
1da177e4 | 1101 | } |
7e06b7f9 N |
1102 | /* XXX Ugh, we need to get rid of this kind of special case: */ |
1103 | if (op->opnum == OP_READ && op->u.read.rd_filp) | |
1104 | fput(op->u.read.rd_filp); | |
e2b20950 SA |
1105 | |
1106 | nfsd4_increment_op_stats(op->opnum); | |
1da177e4 | 1107 | } |
2f425878 AA |
1108 | if (!rqstp->rq_usedeferral && status == nfserr_dropit) { |
1109 | dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); | |
1110 | status = nfserr_jukebox; | |
1111 | } | |
1da177e4 | 1112 | |
da3846a2 | 1113 | resp->cstate.status = status; |
e354d571 AA |
1114 | fh_put(&resp->cstate.current_fh); |
1115 | fh_put(&resp->cstate.save_fh); | |
1116 | BUG_ON(resp->cstate.replay_owner); | |
1da177e4 LT |
1117 | out: |
1118 | nfsd4_release_compoundargs(args); | |
2f425878 AA |
1119 | /* Reset deferral mechanism for RPC deferrals */ |
1120 | rqstp->rq_usedeferral = 1; | |
3b12cd98 | 1121 | dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
1da177e4 LT |
1122 | return status; |
1123 | } | |
1124 | ||
20766016 | 1125 | static struct nfsd4_operation nfsd4_ops[] = { |
b591480b BF |
1126 | [OP_ACCESS] = { |
1127 | .op_func = (nfsd4op_func)nfsd4_access, | |
b001a1b6 | 1128 | .op_name = "OP_ACCESS", |
b591480b BF |
1129 | }, |
1130 | [OP_CLOSE] = { | |
1131 | .op_func = (nfsd4op_func)nfsd4_close, | |
b001a1b6 | 1132 | .op_name = "OP_CLOSE", |
b591480b BF |
1133 | }, |
1134 | [OP_COMMIT] = { | |
1135 | .op_func = (nfsd4op_func)nfsd4_commit, | |
b001a1b6 | 1136 | .op_name = "OP_COMMIT", |
b591480b BF |
1137 | }, |
1138 | [OP_CREATE] = { | |
1139 | .op_func = (nfsd4op_func)nfsd4_create, | |
b001a1b6 | 1140 | .op_name = "OP_CREATE", |
b591480b BF |
1141 | }, |
1142 | [OP_DELEGRETURN] = { | |
1143 | .op_func = (nfsd4op_func)nfsd4_delegreturn, | |
b001a1b6 | 1144 | .op_name = "OP_DELEGRETURN", |
b591480b BF |
1145 | }, |
1146 | [OP_GETATTR] = { | |
1147 | .op_func = (nfsd4op_func)nfsd4_getattr, | |
eeac294e | 1148 | .op_flags = ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1149 | .op_name = "OP_GETATTR", |
b591480b BF |
1150 | }, |
1151 | [OP_GETFH] = { | |
1152 | .op_func = (nfsd4op_func)nfsd4_getfh, | |
b001a1b6 | 1153 | .op_name = "OP_GETFH", |
b591480b BF |
1154 | }, |
1155 | [OP_LINK] = { | |
1156 | .op_func = (nfsd4op_func)nfsd4_link, | |
b001a1b6 | 1157 | .op_name = "OP_LINK", |
b591480b BF |
1158 | }, |
1159 | [OP_LOCK] = { | |
1160 | .op_func = (nfsd4op_func)nfsd4_lock, | |
b001a1b6 | 1161 | .op_name = "OP_LOCK", |
b591480b BF |
1162 | }, |
1163 | [OP_LOCKT] = { | |
1164 | .op_func = (nfsd4op_func)nfsd4_lockt, | |
b001a1b6 | 1165 | .op_name = "OP_LOCKT", |
b591480b BF |
1166 | }, |
1167 | [OP_LOCKU] = { | |
1168 | .op_func = (nfsd4op_func)nfsd4_locku, | |
b001a1b6 | 1169 | .op_name = "OP_LOCKU", |
b591480b BF |
1170 | }, |
1171 | [OP_LOOKUP] = { | |
1172 | .op_func = (nfsd4op_func)nfsd4_lookup, | |
b001a1b6 | 1173 | .op_name = "OP_LOOKUP", |
b591480b BF |
1174 | }, |
1175 | [OP_LOOKUPP] = { | |
1176 | .op_func = (nfsd4op_func)nfsd4_lookupp, | |
b001a1b6 | 1177 | .op_name = "OP_LOOKUPP", |
b591480b BF |
1178 | }, |
1179 | [OP_NVERIFY] = { | |
1180 | .op_func = (nfsd4op_func)nfsd4_nverify, | |
b001a1b6 | 1181 | .op_name = "OP_NVERIFY", |
b591480b BF |
1182 | }, |
1183 | [OP_OPEN] = { | |
1184 | .op_func = (nfsd4op_func)nfsd4_open, | |
b001a1b6 | 1185 | .op_name = "OP_OPEN", |
b591480b BF |
1186 | }, |
1187 | [OP_OPEN_CONFIRM] = { | |
1188 | .op_func = (nfsd4op_func)nfsd4_open_confirm, | |
b001a1b6 | 1189 | .op_name = "OP_OPEN_CONFIRM", |
b591480b BF |
1190 | }, |
1191 | [OP_OPEN_DOWNGRADE] = { | |
1192 | .op_func = (nfsd4op_func)nfsd4_open_downgrade, | |
b001a1b6 | 1193 | .op_name = "OP_OPEN_DOWNGRADE", |
b591480b BF |
1194 | }, |
1195 | [OP_PUTFH] = { | |
1196 | .op_func = (nfsd4op_func)nfsd4_putfh, | |
27d630ec | 1197 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1198 | .op_name = "OP_PUTFH", |
b591480b | 1199 | }, |
eeac294e | 1200 | [OP_PUTPUBFH] = { |
a1c8c4d1 | 1201 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
27d630ec | 1202 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1203 | .op_name = "OP_PUTPUBFH", |
eeac294e | 1204 | }, |
b591480b BF |
1205 | [OP_PUTROOTFH] = { |
1206 | .op_func = (nfsd4op_func)nfsd4_putrootfh, | |
27d630ec | 1207 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1208 | .op_name = "OP_PUTROOTFH", |
b591480b BF |
1209 | }, |
1210 | [OP_READ] = { | |
1211 | .op_func = (nfsd4op_func)nfsd4_read, | |
b001a1b6 | 1212 | .op_name = "OP_READ", |
b591480b BF |
1213 | }, |
1214 | [OP_READDIR] = { | |
1215 | .op_func = (nfsd4op_func)nfsd4_readdir, | |
b001a1b6 | 1216 | .op_name = "OP_READDIR", |
b591480b BF |
1217 | }, |
1218 | [OP_READLINK] = { | |
1219 | .op_func = (nfsd4op_func)nfsd4_readlink, | |
b001a1b6 | 1220 | .op_name = "OP_READLINK", |
b591480b BF |
1221 | }, |
1222 | [OP_REMOVE] = { | |
1223 | .op_func = (nfsd4op_func)nfsd4_remove, | |
b001a1b6 | 1224 | .op_name = "OP_REMOVE", |
b591480b BF |
1225 | }, |
1226 | [OP_RENAME] = { | |
b001a1b6 | 1227 | .op_name = "OP_RENAME", |
b591480b BF |
1228 | .op_func = (nfsd4op_func)nfsd4_rename, |
1229 | }, | |
1230 | [OP_RENEW] = { | |
1231 | .op_func = (nfsd4op_func)nfsd4_renew, | |
27d630ec | 1232 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1233 | .op_name = "OP_RENEW", |
b591480b BF |
1234 | }, |
1235 | [OP_RESTOREFH] = { | |
1236 | .op_func = (nfsd4op_func)nfsd4_restorefh, | |
27d630ec | 1237 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1238 | .op_name = "OP_RESTOREFH", |
b591480b BF |
1239 | }, |
1240 | [OP_SAVEFH] = { | |
1241 | .op_func = (nfsd4op_func)nfsd4_savefh, | |
b001a1b6 | 1242 | .op_name = "OP_SAVEFH", |
b591480b | 1243 | }, |
dcb488a3 AA |
1244 | [OP_SECINFO] = { |
1245 | .op_func = (nfsd4op_func)nfsd4_secinfo, | |
b001a1b6 | 1246 | .op_name = "OP_SECINFO", |
dcb488a3 | 1247 | }, |
b591480b BF |
1248 | [OP_SETATTR] = { |
1249 | .op_func = (nfsd4op_func)nfsd4_setattr, | |
b001a1b6 | 1250 | .op_name = "OP_SETATTR", |
b591480b BF |
1251 | }, |
1252 | [OP_SETCLIENTID] = { | |
1253 | .op_func = (nfsd4op_func)nfsd4_setclientid, | |
27d630ec | 1254 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1255 | .op_name = "OP_SETCLIENTID", |
b591480b BF |
1256 | }, |
1257 | [OP_SETCLIENTID_CONFIRM] = { | |
1258 | .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, | |
27d630ec | 1259 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1260 | .op_name = "OP_SETCLIENTID_CONFIRM", |
b591480b BF |
1261 | }, |
1262 | [OP_VERIFY] = { | |
1263 | .op_func = (nfsd4op_func)nfsd4_verify, | |
b001a1b6 | 1264 | .op_name = "OP_VERIFY", |
b591480b BF |
1265 | }, |
1266 | [OP_WRITE] = { | |
1267 | .op_func = (nfsd4op_func)nfsd4_write, | |
b001a1b6 | 1268 | .op_name = "OP_WRITE", |
b591480b BF |
1269 | }, |
1270 | [OP_RELEASE_LOCKOWNER] = { | |
1271 | .op_func = (nfsd4op_func)nfsd4_release_lockowner, | |
27d630ec | 1272 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1273 | .op_name = "OP_RELEASE_LOCKOWNER", |
b591480b | 1274 | }, |
069b6ad4 AA |
1275 | |
1276 | /* NFSv4.1 operations */ | |
1277 | [OP_EXCHANGE_ID] = { | |
1278 | .op_func = (nfsd4op_func)nfsd4_exchange_id, | |
f9bb94c4 | 1279 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1280 | .op_name = "OP_EXCHANGE_ID", |
1281 | }, | |
1282 | [OP_CREATE_SESSION] = { | |
1283 | .op_func = (nfsd4op_func)nfsd4_create_session, | |
f9bb94c4 | 1284 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1285 | .op_name = "OP_CREATE_SESSION", |
1286 | }, | |
1287 | [OP_DESTROY_SESSION] = { | |
1288 | .op_func = (nfsd4op_func)nfsd4_destroy_session, | |
f9bb94c4 | 1289 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1290 | .op_name = "OP_DESTROY_SESSION", |
1291 | }, | |
1292 | [OP_SEQUENCE] = { | |
1293 | .op_func = (nfsd4op_func)nfsd4_sequence, | |
f9bb94c4 | 1294 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1295 | .op_name = "OP_SEQUENCE", |
1296 | }, | |
b591480b BF |
1297 | }; |
1298 | ||
f1c7f79b | 1299 | static const char *nfsd4_op_name(unsigned opnum) |
b001a1b6 BH |
1300 | { |
1301 | if (opnum < ARRAY_SIZE(nfsd4_ops)) | |
1302 | return nfsd4_ops[opnum].op_name; | |
1303 | return "unknown_operation"; | |
1304 | } | |
1305 | ||
1da177e4 | 1306 | #define nfsd4_voidres nfsd4_voidargs |
1da177e4 LT |
1307 | struct nfsd4_voidargs { int dummy; }; |
1308 | ||
1da177e4 LT |
1309 | /* |
1310 | * TODO: At the present time, the NFSv4 server does not do XID caching | |
1311 | * of requests. Implementing XID caching would not be a serious problem, | |
1312 | * although it would require a mild change in interfaces since one | |
1313 | * doesn't know whether an NFSv4 request is idempotent until after the | |
1314 | * XDR decode. However, XID caching totally confuses pynfs (Peter | |
1315 | * Astrand's regression testsuite for NFSv4 servers), which reuses | |
1316 | * XID's liberally, so I've left it unimplemented until pynfs generates | |
1317 | * better XID's. | |
1318 | */ | |
1319 | static struct svc_procedure nfsd_procedures4[2] = { | |
0a93a47f YZ |
1320 | [NFSPROC4_NULL] = { |
1321 | .pc_func = (svc_procfunc) nfsd4_proc_null, | |
1322 | .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, | |
1323 | .pc_argsize = sizeof(struct nfsd4_voidargs), | |
1324 | .pc_ressize = sizeof(struct nfsd4_voidres), | |
1325 | .pc_cachetype = RC_NOCACHE, | |
1326 | .pc_xdrressize = 1, | |
1327 | }, | |
1328 | [NFSPROC4_COMPOUND] = { | |
1329 | .pc_func = (svc_procfunc) nfsd4_proc_compound, | |
1330 | .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, | |
1331 | .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, | |
1332 | .pc_argsize = sizeof(struct nfsd4_compoundargs), | |
1333 | .pc_ressize = sizeof(struct nfsd4_compoundres), | |
1334 | .pc_cachetype = RC_NOCACHE, | |
1335 | .pc_xdrressize = NFSD_BUFSIZE/4, | |
1336 | }, | |
1da177e4 LT |
1337 | }; |
1338 | ||
1339 | struct svc_version nfsd_version4 = { | |
1340 | .vs_vers = 4, | |
1341 | .vs_nproc = 2, | |
1342 | .vs_proc = nfsd_procedures4, | |
1343 | .vs_dispatch = nfsd_dispatch, | |
1344 | .vs_xdrsize = NFS4_SVC_XDRSIZE, | |
1345 | }; | |
1346 | ||
1347 | /* | |
1348 | * Local variables: | |
1349 | * c-basic-offset: 8 | |
1350 | * End: | |
1351 | */ |