Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfsd/nfs4proc.c | |
3 | * | |
4 | * Server-side procedures for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
1da177e4 LT |
36 | */ |
37 | ||
38 | #include <linux/param.h> | |
39 | #include <linux/major.h> | |
40 | #include <linux/slab.h> | |
7e06b7f9 | 41 | #include <linux/file.h> |
1da177e4 LT |
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> | |
dcb488a3 | 50 | #include <linux/sunrpc/gss_api.h> |
1da177e4 LT |
51 | |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
53 | ||
3c8e0316 YZ |
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; | |
3c8e0316 YZ |
71 | |
72 | /* | |
73 | * Check about attributes are supported by the NFSv4 server or not. | |
74 | * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. | |
75 | */ | |
76 | if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || | |
77 | (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || | |
78 | (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) | |
79 | return nfserr_attrnotsupp; | |
80 | ||
81 | /* | |
a06b1261 | 82 | * Check FATTR4_WORD0_ACL can be supported |
3c8e0316 YZ |
83 | * in current environment or not. |
84 | */ | |
85 | if (bmval[0] & FATTR4_WORD0_ACL) { | |
86 | if (!IS_POSIXACL(dentry->d_inode)) | |
87 | return nfserr_attrnotsupp; | |
88 | } | |
3c8e0316 YZ |
89 | |
90 | /* | |
91 | * According to spec, read-only attributes return ERR_INVAL. | |
92 | */ | |
93 | if (writable) { | |
94 | if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || | |
95 | (bmval[2] & ~writable[2])) | |
96 | return nfserr_inval; | |
97 | } | |
98 | ||
99 | return nfs_ok; | |
100 | } | |
101 | ||
102 | static __be32 | |
103 | nfsd4_check_open_attributes(struct svc_rqst *rqstp, | |
104 | struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
105 | { | |
106 | __be32 status = nfs_ok; | |
107 | ||
108 | if (open->op_create == NFS4_OPEN_CREATE) { | |
109 | if (open->op_createmode == NFS4_CREATE_UNCHECKED | |
110 | || open->op_createmode == NFS4_CREATE_GUARDED) | |
111 | status = check_attr_support(rqstp, cstate, | |
112 | open->op_bmval, nfsd_attrmask); | |
113 | else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) | |
114 | status = check_attr_support(rqstp, cstate, | |
115 | open->op_bmval, nfsd41_ex_attrmask); | |
116 | } | |
117 | ||
118 | return status; | |
119 | } | |
120 | ||
9208faf2 YZ |
121 | static int |
122 | is_create_with_attrs(struct nfsd4_open *open) | |
123 | { | |
124 | return open->op_create == NFS4_OPEN_CREATE | |
125 | && (open->op_createmode == NFS4_CREATE_UNCHECKED | |
126 | || open->op_createmode == NFS4_CREATE_GUARDED | |
127 | || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); | |
128 | } | |
129 | ||
130 | /* | |
131 | * if error occurs when setting the acl, just clear the acl bit | |
132 | * in the returned attr bitmap. | |
133 | */ | |
134 | static void | |
135 | do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, | |
136 | struct nfs4_acl *acl, u32 *bmval) | |
137 | { | |
138 | __be32 status; | |
139 | ||
140 | status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); | |
141 | if (status) | |
142 | /* | |
143 | * We should probably fail the whole open at this point, | |
144 | * but we've already created the file, so it's too late; | |
145 | * So this seems the least of evils: | |
146 | */ | |
147 | bmval[0] &= ~FATTR4_WORD0_ACL; | |
148 | } | |
149 | ||
1da177e4 LT |
150 | static inline void |
151 | fh_dup2(struct svc_fh *dst, struct svc_fh *src) | |
152 | { | |
153 | fh_put(dst); | |
154 | dget(src->fh_dentry); | |
155 | if (src->fh_export) | |
156 | cache_get(&src->fh_export->h); | |
157 | *dst = *src; | |
158 | } | |
159 | ||
b37ad28b | 160 | static __be32 |
dc730e17 | 161 | do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) |
1da177e4 | 162 | { |
b37ad28b | 163 | __be32 status; |
1da177e4 LT |
164 | |
165 | if (open->op_truncate && | |
166 | !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
167 | return nfserr_inval; | |
168 | ||
1da177e4 | 169 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 170 | accmode |= NFSD_MAY_READ; |
9801d8a3 | 171 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 172 | accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); |
9801d8a3 | 173 | if (open->op_share_deny & NFS4_SHARE_DENY_WRITE) |
8837abca | 174 | accmode |= NFSD_MAY_WRITE; |
1da177e4 LT |
175 | |
176 | status = fh_verify(rqstp, current_fh, S_IFREG, accmode); | |
177 | ||
178 | return status; | |
179 | } | |
180 | ||
b37ad28b | 181 | static __be32 |
1da177e4 LT |
182 | do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
183 | { | |
184 | struct svc_fh resfh; | |
b37ad28b | 185 | __be32 status; |
81ac95c5 | 186 | int created = 0; |
1da177e4 LT |
187 | |
188 | fh_init(&resfh, NFS4_FHSIZE); | |
189 | open->op_truncate = 0; | |
190 | ||
191 | if (open->op_create) { | |
79fb54ab BH |
192 | /* FIXME: check session persistence and pnfs flags. |
193 | * The nfsv4.1 spec requires the following semantics: | |
194 | * | |
195 | * Persistent | pNFS | Server REQUIRED | Client Allowed | |
196 | * Reply Cache | server | | | |
197 | * -------------+--------+-----------------+-------------------- | |
198 | * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 | |
199 | * | | | (SHOULD) | |
200 | * | | and EXCLUSIVE4 | or EXCLUSIVE4 | |
201 | * | | | (SHOULD NOT) | |
202 | * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 | |
203 | * yes | no | GUARDED4 | GUARDED4 | |
204 | * yes | yes | GUARDED4 | GUARDED4 | |
205 | */ | |
206 | ||
1da177e4 LT |
207 | /* |
208 | * Note: create modes (UNCHECKED,GUARDED...) are the same | |
209 | * in NFSv4 as in v3. | |
210 | */ | |
211 | status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, | |
212 | open->op_fname.len, &open->op_iattr, | |
213 | &resfh, open->op_createmode, | |
749997e5 JL |
214 | (u32 *)open->op_verf.data, |
215 | &open->op_truncate, &created); | |
216 | ||
99f88726 BF |
217 | /* |
218 | * Following rfc 3530 14.2.16, use the returned bitmask | |
219 | * to indicate which attributes we used to store the | |
220 | * verifier: | |
749997e5 JL |
221 | */ |
222 | if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) | |
99f88726 | 223 | open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | |
749997e5 | 224 | FATTR4_WORD1_TIME_MODIFY); |
af85852d | 225 | } else { |
1da177e4 LT |
226 | status = nfsd_lookup(rqstp, current_fh, |
227 | open->op_fname.data, open->op_fname.len, &resfh); | |
228 | fh_unlock(current_fh); | |
229 | } | |
af85852d BF |
230 | if (status) |
231 | goto out; | |
1da177e4 | 232 | |
9208faf2 YZ |
233 | if (is_create_with_attrs(open) && open->op_acl != NULL) |
234 | do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); | |
235 | ||
af85852d | 236 | set_change_info(&open->op_cinfo, current_fh); |
13024b7b | 237 | fh_dup2(current_fh, &resfh); |
1da177e4 | 238 | |
af85852d | 239 | /* set reply cache */ |
a4773c08 BF |
240 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
241 | &resfh.fh_handle); | |
81ac95c5 | 242 | if (!created) |
8837abca MS |
243 | status = do_open_permission(rqstp, current_fh, open, |
244 | NFSD_MAY_NOP); | |
1da177e4 | 245 | |
af85852d | 246 | out: |
1da177e4 LT |
247 | fh_put(&resfh); |
248 | return status; | |
249 | } | |
250 | ||
b37ad28b | 251 | static __be32 |
1da177e4 LT |
252 | do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
253 | { | |
b37ad28b | 254 | __be32 status; |
1da177e4 LT |
255 | |
256 | /* Only reclaims from previously confirmed clients are valid */ | |
257 | if ((status = nfs4_check_open_reclaim(&open->op_clientid))) | |
258 | return status; | |
259 | ||
260 | /* We don't know the target directory, and therefore can not | |
261 | * set the change info | |
262 | */ | |
263 | ||
264 | memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); | |
265 | ||
266 | /* set replay cache */ | |
a4773c08 BF |
267 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
268 | ¤t_fh->fh_handle); | |
1da177e4 LT |
269 | |
270 | open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && | |
271 | (open->op_iattr.ia_size == 0); | |
272 | ||
8837abca MS |
273 | status = do_open_permission(rqstp, current_fh, open, |
274 | NFSD_MAY_OWNER_OVERRIDE); | |
1da177e4 LT |
275 | |
276 | return status; | |
277 | } | |
278 | ||
60adfc50 AA |
279 | static void |
280 | copy_clientid(clientid_t *clid, struct nfsd4_session *session) | |
281 | { | |
282 | struct nfsd4_sessionid *sid = | |
283 | (struct nfsd4_sessionid *)session->se_sessionid.data; | |
284 | ||
285 | clid->cl_boot = sid->clientid.cl_boot; | |
286 | clid->cl_id = sid->clientid.cl_id; | |
287 | } | |
1da177e4 | 288 | |
7191155b | 289 | static __be32 |
ca364317 | 290 | nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 291 | struct nfsd4_open *open) |
1da177e4 | 292 | { |
b37ad28b | 293 | __be32 status; |
6668958f AA |
294 | struct nfsd4_compoundres *resp; |
295 | ||
1da177e4 LT |
296 | dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", |
297 | (int)open->op_fname.len, open->op_fname.data, | |
298 | open->op_stateowner); | |
299 | ||
1da177e4 LT |
300 | /* This check required by spec. */ |
301 | if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) | |
302 | return nfserr_inval; | |
303 | ||
60adfc50 AA |
304 | if (nfsd4_has_session(cstate)) |
305 | copy_clientid(&open->op_clientid, cstate->session); | |
306 | ||
1da177e4 LT |
307 | nfs4_lock_state(); |
308 | ||
309 | /* check seqid for replay. set nfs4_owner */ | |
6668958f AA |
310 | resp = rqstp->rq_resp; |
311 | status = nfsd4_process_open1(&resp->cstate, open); | |
a90b061c | 312 | if (status == nfserr_replay_me) { |
1da177e4 | 313 | struct nfs4_replay *rp = &open->op_stateowner->so_replay; |
ca364317 | 314 | fh_put(&cstate->current_fh); |
a4773c08 BF |
315 | fh_copy_shallow(&cstate->current_fh.fh_handle, |
316 | &rp->rp_openfh); | |
8837abca | 317 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
318 | if (status) |
319 | dprintk("nfsd4_open: replay failed" | |
320 | " restoring previous filehandle\n"); | |
321 | else | |
a90b061c | 322 | status = nfserr_replay_me; |
1da177e4 LT |
323 | } |
324 | if (status) | |
325 | goto out; | |
fb553c0f | 326 | |
3c8e0316 YZ |
327 | status = nfsd4_check_open_attributes(rqstp, cstate, open); |
328 | if (status) | |
329 | goto out; | |
330 | ||
fb553c0f BF |
331 | /* Openowner is now set, so sequence id will get bumped. Now we need |
332 | * these checks before we do any creates: */ | |
cbd0d51a | 333 | status = nfserr_grace; |
af558e33 | 334 | if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a BF |
335 | goto out; |
336 | status = nfserr_no_grace; | |
af558e33 | 337 | if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a | 338 | goto out; |
fb553c0f | 339 | |
1da177e4 | 340 | switch (open->op_claim_type) { |
0dd3c192 | 341 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
1da177e4 LT |
342 | case NFS4_OPEN_CLAIM_NULL: |
343 | /* | |
344 | * (1) set CURRENT_FH to the file being opened, | |
345 | * creating it if necessary, (2) set open->op_cinfo, | |
346 | * (3) set open->op_truncate if the file is to be | |
347 | * truncated after opening, (4) do permission checking. | |
348 | */ | |
ca364317 BF |
349 | status = do_open_lookup(rqstp, &cstate->current_fh, |
350 | open); | |
1da177e4 LT |
351 | if (status) |
352 | goto out; | |
353 | break; | |
354 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
a525825d | 355 | open->op_stateowner->so_confirmed = 1; |
1da177e4 LT |
356 | /* |
357 | * The CURRENT_FH is already set to the file being | |
358 | * opened. (1) set open->op_cinfo, (2) set | |
359 | * open->op_truncate if the file is to be truncated | |
360 | * after opening, (3) do permission checking. | |
361 | */ | |
ca364317 BF |
362 | status = do_open_fhandle(rqstp, &cstate->current_fh, |
363 | open); | |
1da177e4 LT |
364 | if (status) |
365 | goto out; | |
366 | break; | |
1da177e4 | 367 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
a525825d | 368 | open->op_stateowner->so_confirmed = 1; |
2fdada03 | 369 | dprintk("NFSD: unsupported OPEN claim type %d\n", |
1da177e4 LT |
370 | open->op_claim_type); |
371 | status = nfserr_notsupp; | |
372 | goto out; | |
373 | default: | |
2fdada03 | 374 | dprintk("NFSD: Invalid OPEN claim type %d\n", |
1da177e4 LT |
375 | open->op_claim_type); |
376 | status = nfserr_inval; | |
377 | goto out; | |
378 | } | |
379 | /* | |
380 | * nfsd4_process_open2() does the actual opening of the file. If | |
381 | * successful, it (1) truncates the file if open->op_truncate was | |
382 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. | |
383 | */ | |
ca364317 | 384 | status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); |
1da177e4 | 385 | out: |
f2327d9a | 386 | if (open->op_stateowner) { |
1da177e4 | 387 | nfs4_get_stateowner(open->op_stateowner); |
a4f1706a | 388 | cstate->replay_owner = open->op_stateowner; |
f2327d9a | 389 | } |
1da177e4 LT |
390 | nfs4_unlock_state(); |
391 | return status; | |
392 | } | |
393 | ||
394 | /* | |
395 | * filehandle-manipulating ops. | |
396 | */ | |
7191155b | 397 | static __be32 |
b591480b BF |
398 | nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
399 | struct svc_fh **getfh) | |
1da177e4 | 400 | { |
ca364317 | 401 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
402 | return nfserr_nofilehandle; |
403 | ||
ca364317 | 404 | *getfh = &cstate->current_fh; |
1da177e4 LT |
405 | return nfs_ok; |
406 | } | |
407 | ||
7191155b | 408 | static __be32 |
ca364317 BF |
409 | nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
410 | struct nfsd4_putfh *putfh) | |
1da177e4 | 411 | { |
ca364317 BF |
412 | fh_put(&cstate->current_fh); |
413 | cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; | |
414 | memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, | |
415 | putfh->pf_fhlen); | |
8837abca | 416 | return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
417 | } |
418 | ||
7191155b | 419 | static __be32 |
b591480b BF |
420 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
421 | void *arg) | |
1da177e4 | 422 | { |
b37ad28b | 423 | __be32 status; |
1da177e4 | 424 | |
ca364317 | 425 | fh_put(&cstate->current_fh); |
df547efb | 426 | status = exp_pseudoroot(rqstp, &cstate->current_fh); |
1da177e4 LT |
427 | return status; |
428 | } | |
429 | ||
7191155b | 430 | static __be32 |
b591480b BF |
431 | nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
432 | void *arg) | |
1da177e4 | 433 | { |
ca364317 | 434 | if (!cstate->save_fh.fh_dentry) |
1da177e4 LT |
435 | return nfserr_restorefh; |
436 | ||
ca364317 | 437 | fh_dup2(&cstate->current_fh, &cstate->save_fh); |
1da177e4 LT |
438 | return nfs_ok; |
439 | } | |
440 | ||
7191155b | 441 | static __be32 |
b591480b BF |
442 | nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
443 | void *arg) | |
1da177e4 | 444 | { |
ca364317 | 445 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
446 | return nfserr_nofilehandle; |
447 | ||
ca364317 | 448 | fh_dup2(&cstate->save_fh, &cstate->current_fh); |
1da177e4 LT |
449 | return nfs_ok; |
450 | } | |
451 | ||
452 | /* | |
453 | * misc nfsv4 ops | |
454 | */ | |
7191155b | 455 | static __be32 |
ca364317 BF |
456 | nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
457 | struct nfsd4_access *access) | |
1da177e4 LT |
458 | { |
459 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) | |
460 | return nfserr_inval; | |
461 | ||
462 | access->ac_resp_access = access->ac_req_access; | |
ca364317 BF |
463 | return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
464 | &access->ac_supported); | |
1da177e4 LT |
465 | } |
466 | ||
7191155b | 467 | static __be32 |
ca364317 BF |
468 | nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
469 | struct nfsd4_commit *commit) | |
1da177e4 | 470 | { |
b37ad28b | 471 | __be32 status; |
1da177e4 LT |
472 | |
473 | u32 *p = (u32 *)commit->co_verf.data; | |
474 | *p++ = nfssvc_boot.tv_sec; | |
475 | *p++ = nfssvc_boot.tv_usec; | |
476 | ||
ca364317 BF |
477 | status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
478 | commit->co_count); | |
1da177e4 LT |
479 | if (status == nfserr_symlink) |
480 | status = nfserr_inval; | |
481 | return status; | |
482 | } | |
483 | ||
b37ad28b | 484 | static __be32 |
ca364317 BF |
485 | nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
486 | struct nfsd4_create *create) | |
1da177e4 LT |
487 | { |
488 | struct svc_fh resfh; | |
b37ad28b | 489 | __be32 status; |
1da177e4 LT |
490 | dev_t rdev; |
491 | ||
492 | fh_init(&resfh, NFS4_FHSIZE); | |
493 | ||
8837abca MS |
494 | status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, |
495 | NFSD_MAY_CREATE); | |
1da177e4 LT |
496 | if (status == nfserr_symlink) |
497 | status = nfserr_notdir; | |
498 | if (status) | |
499 | return status; | |
500 | ||
3c8e0316 YZ |
501 | status = check_attr_support(rqstp, cstate, create->cr_bmval, |
502 | nfsd_attrmask); | |
503 | if (status) | |
504 | return status; | |
505 | ||
1da177e4 LT |
506 | switch (create->cr_type) { |
507 | case NF4LNK: | |
508 | /* ugh! we have to null-terminate the linktext, or | |
509 | * vfs_symlink() will choke. it is always safe to | |
510 | * null-terminate by brute force, since at worst we | |
511 | * will overwrite the first byte of the create namelen | |
512 | * in the XDR buffer, which has already been extracted | |
513 | * during XDR decode. | |
514 | */ | |
515 | create->cr_linkname[create->cr_linklen] = 0; | |
516 | ||
ca364317 BF |
517 | status = nfsd_symlink(rqstp, &cstate->current_fh, |
518 | create->cr_name, create->cr_namelen, | |
519 | create->cr_linkname, create->cr_linklen, | |
520 | &resfh, &create->cr_iattr); | |
1da177e4 LT |
521 | break; |
522 | ||
523 | case NF4BLK: | |
524 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
525 | if (MAJOR(rdev) != create->cr_specdata1 || | |
526 | MINOR(rdev) != create->cr_specdata2) | |
527 | return nfserr_inval; | |
ca364317 BF |
528 | status = nfsd_create(rqstp, &cstate->current_fh, |
529 | create->cr_name, create->cr_namelen, | |
530 | &create->cr_iattr, S_IFBLK, rdev, &resfh); | |
1da177e4 LT |
531 | break; |
532 | ||
533 | case NF4CHR: | |
534 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
535 | if (MAJOR(rdev) != create->cr_specdata1 || | |
536 | MINOR(rdev) != create->cr_specdata2) | |
537 | return nfserr_inval; | |
ca364317 BF |
538 | status = nfsd_create(rqstp, &cstate->current_fh, |
539 | create->cr_name, create->cr_namelen, | |
540 | &create->cr_iattr,S_IFCHR, rdev, &resfh); | |
1da177e4 LT |
541 | break; |
542 | ||
543 | case NF4SOCK: | |
ca364317 BF |
544 | status = nfsd_create(rqstp, &cstate->current_fh, |
545 | create->cr_name, create->cr_namelen, | |
546 | &create->cr_iattr, S_IFSOCK, 0, &resfh); | |
1da177e4 LT |
547 | break; |
548 | ||
549 | case NF4FIFO: | |
ca364317 BF |
550 | status = nfsd_create(rqstp, &cstate->current_fh, |
551 | create->cr_name, create->cr_namelen, | |
552 | &create->cr_iattr, S_IFIFO, 0, &resfh); | |
1da177e4 LT |
553 | break; |
554 | ||
555 | case NF4DIR: | |
556 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; | |
ca364317 BF |
557 | status = nfsd_create(rqstp, &cstate->current_fh, |
558 | create->cr_name, create->cr_namelen, | |
559 | &create->cr_iattr, S_IFDIR, 0, &resfh); | |
1da177e4 LT |
560 | break; |
561 | ||
562 | default: | |
563 | status = nfserr_badtype; | |
564 | } | |
565 | ||
9208faf2 YZ |
566 | if (status) |
567 | goto out; | |
1da177e4 | 568 | |
9208faf2 YZ |
569 | if (create->cr_acl != NULL) |
570 | do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, | |
571 | create->cr_bmval); | |
572 | ||
573 | fh_unlock(&cstate->current_fh); | |
574 | set_change_info(&create->cr_cinfo, &cstate->current_fh); | |
575 | fh_dup2(&cstate->current_fh, &resfh); | |
576 | out: | |
1da177e4 LT |
577 | fh_put(&resfh); |
578 | return status; | |
579 | } | |
580 | ||
7191155b | 581 | static __be32 |
ca364317 BF |
582 | nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
583 | struct nfsd4_getattr *getattr) | |
1da177e4 | 584 | { |
b37ad28b | 585 | __be32 status; |
1da177e4 | 586 | |
8837abca | 587 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
588 | if (status) |
589 | return status; | |
590 | ||
591 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
592 | return nfserr_inval; | |
593 | ||
7e705706 AA |
594 | getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
595 | getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); | |
596 | getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); | |
1da177e4 | 597 | |
ca364317 | 598 | getattr->ga_fhp = &cstate->current_fh; |
1da177e4 LT |
599 | return nfs_ok; |
600 | } | |
601 | ||
7191155b | 602 | static __be32 |
ca364317 BF |
603 | nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
604 | struct nfsd4_link *link) | |
1da177e4 | 605 | { |
b37ad28b | 606 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 607 | |
ca364317 | 608 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 609 | return status; |
ca364317 BF |
610 | status = nfsd_link(rqstp, &cstate->current_fh, |
611 | link->li_name, link->li_namelen, &cstate->save_fh); | |
1da177e4 | 612 | if (!status) |
ca364317 | 613 | set_change_info(&link->li_cinfo, &cstate->current_fh); |
1da177e4 LT |
614 | return status; |
615 | } | |
616 | ||
b37ad28b | 617 | static __be32 |
b591480b BF |
618 | nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
619 | void *arg) | |
1da177e4 LT |
620 | { |
621 | struct svc_fh tmp_fh; | |
b37ad28b | 622 | __be32 ret; |
1da177e4 LT |
623 | |
624 | fh_init(&tmp_fh, NFS4_FHSIZE); | |
df547efb BF |
625 | ret = exp_pseudoroot(rqstp, &tmp_fh); |
626 | if (ret) | |
1da177e4 | 627 | return ret; |
ca364317 | 628 | if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { |
1da177e4 LT |
629 | fh_put(&tmp_fh); |
630 | return nfserr_noent; | |
631 | } | |
632 | fh_put(&tmp_fh); | |
ca364317 BF |
633 | return nfsd_lookup(rqstp, &cstate->current_fh, |
634 | "..", 2, &cstate->current_fh); | |
1da177e4 LT |
635 | } |
636 | ||
7191155b | 637 | static __be32 |
ca364317 BF |
638 | nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
639 | struct nfsd4_lookup *lookup) | |
1da177e4 | 640 | { |
ca364317 BF |
641 | return nfsd_lookup(rqstp, &cstate->current_fh, |
642 | lookup->lo_name, lookup->lo_len, | |
643 | &cstate->current_fh); | |
1da177e4 LT |
644 | } |
645 | ||
7191155b | 646 | static __be32 |
ca364317 BF |
647 | nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
648 | struct nfsd4_read *read) | |
1da177e4 | 649 | { |
b37ad28b | 650 | __be32 status; |
1da177e4 LT |
651 | |
652 | /* no need to check permission - this will be done in nfsd_read() */ | |
653 | ||
7e06b7f9 | 654 | read->rd_filp = NULL; |
1da177e4 LT |
655 | if (read->rd_offset >= OFFSET_MAX) |
656 | return nfserr_inval; | |
657 | ||
658 | nfs4_lock_state(); | |
659 | /* check stateid */ | |
dd453dfd BH |
660 | if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, |
661 | RD_STATE, &read->rd_filp))) { | |
1da177e4 LT |
662 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
663 | goto out; | |
664 | } | |
7e06b7f9 N |
665 | if (read->rd_filp) |
666 | get_file(read->rd_filp); | |
1da177e4 LT |
667 | status = nfs_ok; |
668 | out: | |
669 | nfs4_unlock_state(); | |
670 | read->rd_rqstp = rqstp; | |
ca364317 | 671 | read->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
672 | return status; |
673 | } | |
674 | ||
7191155b | 675 | static __be32 |
ca364317 BF |
676 | nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
677 | struct nfsd4_readdir *readdir) | |
1da177e4 LT |
678 | { |
679 | u64 cookie = readdir->rd_cookie; | |
680 | static const nfs4_verifier zeroverf; | |
681 | ||
682 | /* no need to check permission - this will be done in nfsd_readdir() */ | |
683 | ||
684 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
685 | return nfserr_inval; | |
686 | ||
7e705706 AA |
687 | readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
688 | readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); | |
689 | readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); | |
1da177e4 LT |
690 | |
691 | if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || | |
692 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) | |
693 | return nfserr_bad_cookie; | |
694 | ||
695 | readdir->rd_rqstp = rqstp; | |
ca364317 | 696 | readdir->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
697 | return nfs_ok; |
698 | } | |
699 | ||
7191155b | 700 | static __be32 |
ca364317 BF |
701 | nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
702 | struct nfsd4_readlink *readlink) | |
1da177e4 LT |
703 | { |
704 | readlink->rl_rqstp = rqstp; | |
ca364317 | 705 | readlink->rl_fhp = &cstate->current_fh; |
1da177e4 LT |
706 | return nfs_ok; |
707 | } | |
708 | ||
7191155b | 709 | static __be32 |
ca364317 BF |
710 | nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
711 | struct nfsd4_remove *remove) | |
1da177e4 | 712 | { |
b37ad28b | 713 | __be32 status; |
1da177e4 | 714 | |
af558e33 | 715 | if (locks_in_grace()) |
c815afc7 | 716 | return nfserr_grace; |
ca364317 BF |
717 | status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
718 | remove->rm_name, remove->rm_namelen); | |
1da177e4 LT |
719 | if (status == nfserr_symlink) |
720 | return nfserr_notdir; | |
721 | if (!status) { | |
ca364317 BF |
722 | fh_unlock(&cstate->current_fh); |
723 | set_change_info(&remove->rm_cinfo, &cstate->current_fh); | |
1da177e4 LT |
724 | } |
725 | return status; | |
726 | } | |
727 | ||
7191155b | 728 | static __be32 |
ca364317 BF |
729 | nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
730 | struct nfsd4_rename *rename) | |
1da177e4 | 731 | { |
b37ad28b | 732 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 733 | |
ca364317 | 734 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 735 | return status; |
af558e33 | 736 | if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags |
c815afc7 N |
737 | & NFSEXP_NOSUBTREECHECK)) |
738 | return nfserr_grace; | |
ca364317 BF |
739 | status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
740 | rename->rn_snamelen, &cstate->current_fh, | |
1da177e4 LT |
741 | rename->rn_tname, rename->rn_tnamelen); |
742 | ||
743 | /* the underlying filesystem returns different error's than required | |
744 | * by NFSv4. both save_fh and current_fh have been verified.. */ | |
745 | if (status == nfserr_isdir) | |
746 | status = nfserr_exist; | |
747 | else if ((status == nfserr_notdir) && | |
ca364317 BF |
748 | (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && |
749 | S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) | |
1da177e4 LT |
750 | status = nfserr_exist; |
751 | else if (status == nfserr_symlink) | |
752 | status = nfserr_notdir; | |
753 | ||
754 | if (!status) { | |
ca364317 BF |
755 | set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
756 | set_change_info(&rename->rn_tinfo, &cstate->save_fh); | |
1da177e4 LT |
757 | } |
758 | return status; | |
759 | } | |
760 | ||
dcb488a3 AA |
761 | static __be32 |
762 | nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
763 | struct nfsd4_secinfo *secinfo) | |
764 | { | |
765 | struct svc_fh resfh; | |
766 | struct svc_export *exp; | |
767 | struct dentry *dentry; | |
768 | __be32 err; | |
769 | ||
770 | fh_init(&resfh, NFS4_FHSIZE); | |
771 | err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, | |
772 | secinfo->si_name, secinfo->si_namelen, | |
773 | &exp, &dentry); | |
774 | if (err) | |
775 | return err; | |
776 | if (dentry->d_inode == NULL) { | |
777 | exp_put(exp); | |
778 | err = nfserr_noent; | |
779 | } else | |
780 | secinfo->si_exp = exp; | |
781 | dput(dentry); | |
782 | return err; | |
783 | } | |
784 | ||
7191155b | 785 | static __be32 |
ca364317 BF |
786 | nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
787 | struct nfsd4_setattr *setattr) | |
1da177e4 | 788 | { |
b37ad28b | 789 | __be32 status = nfs_ok; |
1da177e4 | 790 | |
1da177e4 LT |
791 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
792 | nfs4_lock_state(); | |
dd453dfd | 793 | status = nfs4_preprocess_stateid_op(cstate, |
6150ef0d | 794 | &setattr->sa_stateid, WR_STATE, NULL); |
1da177e4 | 795 | nfs4_unlock_state(); |
375c5547 | 796 | if (status) { |
3e3b4800 | 797 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
375c5547 BF |
798 | return status; |
799 | } | |
1da177e4 | 800 | } |
18f335af DH |
801 | status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); |
802 | if (status) | |
803 | return status; | |
1da177e4 | 804 | status = nfs_ok; |
3c8e0316 YZ |
805 | |
806 | status = check_attr_support(rqstp, cstate, setattr->sa_bmval, | |
807 | nfsd_attrmask); | |
808 | if (status) | |
809 | goto out; | |
810 | ||
1da177e4 | 811 | if (setattr->sa_acl != NULL) |
ca364317 BF |
812 | status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
813 | setattr->sa_acl); | |
1da177e4 | 814 | if (status) |
18f335af | 815 | goto out; |
ca364317 | 816 | status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
1da177e4 | 817 | 0, (time_t)0); |
18f335af DH |
818 | out: |
819 | mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); | |
1da177e4 LT |
820 | return status; |
821 | } | |
822 | ||
7191155b | 823 | static __be32 |
ca364317 BF |
824 | nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
825 | struct nfsd4_write *write) | |
1da177e4 LT |
826 | { |
827 | stateid_t *stateid = &write->wr_stateid; | |
828 | struct file *filp = NULL; | |
829 | u32 *p; | |
b37ad28b | 830 | __be32 status = nfs_ok; |
31dec253 | 831 | unsigned long cnt; |
1da177e4 LT |
832 | |
833 | /* no need to check permission - this will be done in nfsd_write() */ | |
834 | ||
835 | if (write->wr_offset >= OFFSET_MAX) | |
836 | return nfserr_inval; | |
837 | ||
838 | nfs4_lock_state(); | |
dd453dfd | 839 | status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); |
7e06b7f9 N |
840 | if (filp) |
841 | get_file(filp); | |
1da177e4 LT |
842 | nfs4_unlock_state(); |
843 | ||
375c5547 BF |
844 | if (status) { |
845 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); | |
846 | return status; | |
847 | } | |
848 | ||
31dec253 | 849 | cnt = write->wr_buflen; |
1da177e4 LT |
850 | write->wr_how_written = write->wr_stable_how; |
851 | p = (u32 *)write->wr_verifier.data; | |
852 | *p++ = nfssvc_boot.tv_sec; | |
853 | *p++ = nfssvc_boot.tv_usec; | |
854 | ||
ca364317 BF |
855 | status = nfsd_write(rqstp, &cstate->current_fh, filp, |
856 | write->wr_offset, rqstp->rq_vec, write->wr_vlen, | |
31dec253 | 857 | &cnt, &write->wr_how_written); |
7e06b7f9 N |
858 | if (filp) |
859 | fput(filp); | |
1da177e4 | 860 | |
31dec253 DS |
861 | write->wr_bytes_written = cnt; |
862 | ||
1da177e4 LT |
863 | if (status == nfserr_symlink) |
864 | status = nfserr_inval; | |
865 | return status; | |
1da177e4 LT |
866 | } |
867 | ||
868 | /* This routine never returns NFS_OK! If there are no other errors, it | |
869 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the | |
870 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME | |
871 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. | |
872 | */ | |
b37ad28b | 873 | static __be32 |
c954e2a5 | 874 | _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
ca364317 | 875 | struct nfsd4_verify *verify) |
1da177e4 | 876 | { |
2ebbc012 | 877 | __be32 *buf, *p; |
1da177e4 | 878 | int count; |
b37ad28b | 879 | __be32 status; |
1da177e4 | 880 | |
8837abca | 881 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
882 | if (status) |
883 | return status; | |
884 | ||
3c8e0316 YZ |
885 | status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); |
886 | if (status) | |
887 | return status; | |
888 | ||
1da177e4 LT |
889 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) |
890 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) | |
891 | return nfserr_inval; | |
892 | if (verify->ve_attrlen & 3) | |
893 | return nfserr_inval; | |
894 | ||
895 | /* count in words: | |
896 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 | |
897 | */ | |
898 | count = 4 + (verify->ve_attrlen >> 2); | |
899 | buf = kmalloc(count << 2, GFP_KERNEL); | |
900 | if (!buf) | |
901 | return nfserr_resource; | |
902 | ||
ca364317 BF |
903 | status = nfsd4_encode_fattr(&cstate->current_fh, |
904 | cstate->current_fh.fh_export, | |
905 | cstate->current_fh.fh_dentry, buf, | |
1da177e4 | 906 | &count, verify->ve_bmval, |
406a7ea9 | 907 | rqstp, 0); |
1da177e4 LT |
908 | |
909 | /* this means that nfsd4_encode_fattr() ran out of space */ | |
910 | if (status == nfserr_resource && count == 0) | |
911 | status = nfserr_not_same; | |
912 | if (status) | |
913 | goto out_kfree; | |
914 | ||
95ec28cd BH |
915 | /* skip bitmap */ |
916 | p = buf + 1 + ntohl(buf[0]); | |
1da177e4 LT |
917 | status = nfserr_not_same; |
918 | if (ntohl(*p++) != verify->ve_attrlen) | |
919 | goto out_kfree; | |
920 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) | |
921 | status = nfserr_same; | |
922 | ||
923 | out_kfree: | |
924 | kfree(buf); | |
925 | return status; | |
926 | } | |
927 | ||
c954e2a5 BF |
928 | static __be32 |
929 | nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
930 | struct nfsd4_verify *verify) | |
931 | { | |
932 | __be32 status; | |
933 | ||
934 | status = _nfsd4_verify(rqstp, cstate, verify); | |
935 | return status == nfserr_not_same ? nfs_ok : status; | |
936 | } | |
937 | ||
938 | static __be32 | |
939 | nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
940 | struct nfsd4_verify *verify) | |
941 | { | |
942 | __be32 status; | |
943 | ||
944 | status = _nfsd4_verify(rqstp, cstate, verify); | |
945 | return status == nfserr_same ? nfs_ok : status; | |
946 | } | |
947 | ||
1da177e4 LT |
948 | /* |
949 | * NULL call. | |
950 | */ | |
7111c66e | 951 | static __be32 |
1da177e4 LT |
952 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
953 | { | |
954 | return nfs_ok; | |
955 | } | |
956 | ||
e2b20950 SA |
957 | static inline void nfsd4_increment_op_stats(u32 opnum) |
958 | { | |
959 | if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) | |
960 | nfsdstats.nfs4_opcount[opnum]++; | |
961 | } | |
962 | ||
b591480b BF |
963 | typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
964 | void *); | |
f9bb94c4 AA |
965 | enum nfsd4_op_flags { |
966 | ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ | |
967 | ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ | |
968 | ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ | |
969 | }; | |
b591480b BF |
970 | |
971 | struct nfsd4_operation { | |
972 | nfsd4op_func op_func; | |
973 | u32 op_flags; | |
b001a1b6 | 974 | char *op_name; |
b591480b BF |
975 | }; |
976 | ||
977 | static struct nfsd4_operation nfsd4_ops[]; | |
978 | ||
f1c7f79b | 979 | static const char *nfsd4_op_name(unsigned opnum); |
b001a1b6 | 980 | |
f9bb94c4 AA |
981 | /* |
982 | * Enforce NFSv4.1 COMPOUND ordering rules. | |
983 | * | |
984 | * TODO: | |
985 | * - enforce NFS4ERR_NOT_ONLY_OP, | |
986 | * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. | |
987 | */ | |
988 | static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) | |
989 | { | |
990 | if (args->minorversion && args->opcnt > 0) { | |
991 | struct nfsd4_op *op = &args->ops[0]; | |
992 | return (op->status == nfserr_op_illegal) || | |
993 | (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); | |
994 | } | |
995 | return true; | |
996 | } | |
997 | ||
1da177e4 LT |
998 | /* |
999 | * COMPOUND call. | |
1000 | */ | |
7111c66e | 1001 | static __be32 |
1da177e4 LT |
1002 | nfsd4_proc_compound(struct svc_rqst *rqstp, |
1003 | struct nfsd4_compoundargs *args, | |
1004 | struct nfsd4_compoundres *resp) | |
1005 | { | |
1006 | struct nfsd4_op *op; | |
b591480b | 1007 | struct nfsd4_operation *opdesc; |
e354d571 | 1008 | struct nfsd4_compound_state *cstate = &resp->cstate; |
e5710199 | 1009 | int slack_bytes; |
b37ad28b | 1010 | __be32 status; |
1da177e4 | 1011 | |
1da177e4 | 1012 | resp->xbuf = &rqstp->rq_res; |
e354d571 AA |
1013 | resp->p = rqstp->rq_res.head[0].iov_base + |
1014 | rqstp->rq_res.head[0].iov_len; | |
1da177e4 LT |
1015 | resp->tagp = resp->p; |
1016 | /* reserve space for: taglen, tag, and opcnt */ | |
1017 | resp->p += 2 + XDR_QUADLEN(args->taglen); | |
1018 | resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; | |
1019 | resp->taglen = args->taglen; | |
1020 | resp->tag = args->tag; | |
1021 | resp->opcnt = 0; | |
1022 | resp->rqstp = rqstp; | |
d87a8ade | 1023 | resp->cstate.minorversion = args->minorversion; |
e354d571 AA |
1024 | resp->cstate.replay_owner = NULL; |
1025 | fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); | |
1026 | fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); | |
2f425878 AA |
1027 | /* Use the deferral mechanism only for NFSv4.0 compounds */ |
1028 | rqstp->rq_usedeferral = (args->minorversion == 0); | |
1da177e4 LT |
1029 | |
1030 | /* | |
1031 | * According to RFC3010, this takes precedence over all other errors. | |
1032 | */ | |
1033 | status = nfserr_minor_vers_mismatch; | |
8daf220a | 1034 | if (args->minorversion > nfsd_supported_minorversion) |
1da177e4 LT |
1035 | goto out; |
1036 | ||
f9bb94c4 AA |
1037 | if (!nfs41_op_ordering_ok(args)) { |
1038 | op = &args->ops[0]; | |
1039 | op->status = nfserr_sequence_pos; | |
1040 | goto encode_op; | |
1041 | } | |
1042 | ||
1da177e4 LT |
1043 | status = nfs_ok; |
1044 | while (!status && resp->opcnt < args->opcnt) { | |
1045 | op = &args->ops[resp->opcnt++]; | |
1046 | ||
b001a1b6 BH |
1047 | dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", |
1048 | resp->opcnt, args->opcnt, op->opnum, | |
1049 | nfsd4_op_name(op->opnum)); | |
1da177e4 LT |
1050 | /* |
1051 | * The XDR decode routines may have pre-set op->status; | |
1052 | * for example, if there is a miscellaneous XDR error | |
1053 | * it will be set to nfserr_bad_xdr. | |
1054 | */ | |
1055 | if (op->status) | |
1056 | goto encode_op; | |
1057 | ||
1058 | /* We must be able to encode a successful response to | |
1059 | * this operation, with enough room left over to encode a | |
1060 | * failed response to the next operation. If we don't | |
1061 | * have enough room, fail with ERR_RESOURCE. | |
1062 | */ | |
e5710199 BF |
1063 | slack_bytes = (char *)resp->end - (char *)resp->p; |
1064 | if (slack_bytes < COMPOUND_SLACK_SPACE | |
1065 | + COMPOUND_ERR_SLACK_SPACE) { | |
1066 | BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); | |
1da177e4 LT |
1067 | op->status = nfserr_resource; |
1068 | goto encode_op; | |
1069 | } | |
1070 | ||
b591480b BF |
1071 | opdesc = &nfsd4_ops[op->opnum]; |
1072 | ||
ca364317 | 1073 | if (!cstate->current_fh.fh_dentry) { |
27d630ec | 1074 | if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
42ca0993 BF |
1075 | op->status = nfserr_nofilehandle; |
1076 | goto encode_op; | |
1077 | } | |
eeac294e BF |
1078 | } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && |
1079 | !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { | |
42ca0993 | 1080 | op->status = nfserr_moved; |
1da177e4 LT |
1081 | goto encode_op; |
1082 | } | |
b591480b BF |
1083 | |
1084 | if (opdesc->op_func) | |
1085 | op->status = opdesc->op_func(rqstp, cstate, &op->u); | |
1086 | else | |
1da177e4 | 1087 | BUG_ON(op->status == nfs_ok); |
1da177e4 LT |
1088 | |
1089 | encode_op: | |
49557cc7 | 1090 | /* Only from SEQUENCE */ |
da3846a2 AA |
1091 | if (resp->cstate.status == nfserr_replay_cache) { |
1092 | dprintk("%s NFS4.1 replay from cache\n", __func__); | |
abfabf8c | 1093 | status = op->status; |
da3846a2 AA |
1094 | goto out; |
1095 | } | |
a90b061c | 1096 | if (op->status == nfserr_replay_me) { |
a4f1706a | 1097 | op->replay = &cstate->replay_owner->so_replay; |
1da177e4 LT |
1098 | nfsd4_encode_replay(resp, op); |
1099 | status = op->status = op->replay->rp_status; | |
1100 | } else { | |
1101 | nfsd4_encode_operation(resp, op); | |
1102 | status = op->status; | |
1103 | } | |
0407717d BH |
1104 | |
1105 | dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", | |
1106 | args->ops, args->opcnt, resp->opcnt, op->opnum, | |
1107 | be32_to_cpu(status)); | |
1108 | ||
a4f1706a BF |
1109 | if (cstate->replay_owner) { |
1110 | nfs4_put_stateowner(cstate->replay_owner); | |
1111 | cstate->replay_owner = NULL; | |
1da177e4 | 1112 | } |
7e06b7f9 N |
1113 | /* XXX Ugh, we need to get rid of this kind of special case: */ |
1114 | if (op->opnum == OP_READ && op->u.read.rd_filp) | |
1115 | fput(op->u.read.rd_filp); | |
e2b20950 SA |
1116 | |
1117 | nfsd4_increment_op_stats(op->opnum); | |
1da177e4 | 1118 | } |
2f425878 AA |
1119 | if (!rqstp->rq_usedeferral && status == nfserr_dropit) { |
1120 | dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); | |
1121 | status = nfserr_jukebox; | |
1122 | } | |
1da177e4 | 1123 | |
da3846a2 | 1124 | resp->cstate.status = status; |
e354d571 AA |
1125 | fh_put(&resp->cstate.current_fh); |
1126 | fh_put(&resp->cstate.save_fh); | |
1127 | BUG_ON(resp->cstate.replay_owner); | |
1da177e4 LT |
1128 | out: |
1129 | nfsd4_release_compoundargs(args); | |
2f425878 AA |
1130 | /* Reset deferral mechanism for RPC deferrals */ |
1131 | rqstp->rq_usedeferral = 1; | |
3b12cd98 | 1132 | dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
1da177e4 LT |
1133 | return status; |
1134 | } | |
1135 | ||
20766016 | 1136 | static struct nfsd4_operation nfsd4_ops[] = { |
b591480b BF |
1137 | [OP_ACCESS] = { |
1138 | .op_func = (nfsd4op_func)nfsd4_access, | |
b001a1b6 | 1139 | .op_name = "OP_ACCESS", |
b591480b BF |
1140 | }, |
1141 | [OP_CLOSE] = { | |
1142 | .op_func = (nfsd4op_func)nfsd4_close, | |
b001a1b6 | 1143 | .op_name = "OP_CLOSE", |
b591480b BF |
1144 | }, |
1145 | [OP_COMMIT] = { | |
1146 | .op_func = (nfsd4op_func)nfsd4_commit, | |
b001a1b6 | 1147 | .op_name = "OP_COMMIT", |
b591480b BF |
1148 | }, |
1149 | [OP_CREATE] = { | |
1150 | .op_func = (nfsd4op_func)nfsd4_create, | |
b001a1b6 | 1151 | .op_name = "OP_CREATE", |
b591480b BF |
1152 | }, |
1153 | [OP_DELEGRETURN] = { | |
1154 | .op_func = (nfsd4op_func)nfsd4_delegreturn, | |
b001a1b6 | 1155 | .op_name = "OP_DELEGRETURN", |
b591480b BF |
1156 | }, |
1157 | [OP_GETATTR] = { | |
1158 | .op_func = (nfsd4op_func)nfsd4_getattr, | |
eeac294e | 1159 | .op_flags = ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1160 | .op_name = "OP_GETATTR", |
b591480b BF |
1161 | }, |
1162 | [OP_GETFH] = { | |
1163 | .op_func = (nfsd4op_func)nfsd4_getfh, | |
b001a1b6 | 1164 | .op_name = "OP_GETFH", |
b591480b BF |
1165 | }, |
1166 | [OP_LINK] = { | |
1167 | .op_func = (nfsd4op_func)nfsd4_link, | |
b001a1b6 | 1168 | .op_name = "OP_LINK", |
b591480b BF |
1169 | }, |
1170 | [OP_LOCK] = { | |
1171 | .op_func = (nfsd4op_func)nfsd4_lock, | |
b001a1b6 | 1172 | .op_name = "OP_LOCK", |
b591480b BF |
1173 | }, |
1174 | [OP_LOCKT] = { | |
1175 | .op_func = (nfsd4op_func)nfsd4_lockt, | |
b001a1b6 | 1176 | .op_name = "OP_LOCKT", |
b591480b BF |
1177 | }, |
1178 | [OP_LOCKU] = { | |
1179 | .op_func = (nfsd4op_func)nfsd4_locku, | |
b001a1b6 | 1180 | .op_name = "OP_LOCKU", |
b591480b BF |
1181 | }, |
1182 | [OP_LOOKUP] = { | |
1183 | .op_func = (nfsd4op_func)nfsd4_lookup, | |
b001a1b6 | 1184 | .op_name = "OP_LOOKUP", |
b591480b BF |
1185 | }, |
1186 | [OP_LOOKUPP] = { | |
1187 | .op_func = (nfsd4op_func)nfsd4_lookupp, | |
b001a1b6 | 1188 | .op_name = "OP_LOOKUPP", |
b591480b BF |
1189 | }, |
1190 | [OP_NVERIFY] = { | |
1191 | .op_func = (nfsd4op_func)nfsd4_nverify, | |
b001a1b6 | 1192 | .op_name = "OP_NVERIFY", |
b591480b BF |
1193 | }, |
1194 | [OP_OPEN] = { | |
1195 | .op_func = (nfsd4op_func)nfsd4_open, | |
b001a1b6 | 1196 | .op_name = "OP_OPEN", |
b591480b BF |
1197 | }, |
1198 | [OP_OPEN_CONFIRM] = { | |
1199 | .op_func = (nfsd4op_func)nfsd4_open_confirm, | |
b001a1b6 | 1200 | .op_name = "OP_OPEN_CONFIRM", |
b591480b BF |
1201 | }, |
1202 | [OP_OPEN_DOWNGRADE] = { | |
1203 | .op_func = (nfsd4op_func)nfsd4_open_downgrade, | |
b001a1b6 | 1204 | .op_name = "OP_OPEN_DOWNGRADE", |
b591480b BF |
1205 | }, |
1206 | [OP_PUTFH] = { | |
1207 | .op_func = (nfsd4op_func)nfsd4_putfh, | |
27d630ec | 1208 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1209 | .op_name = "OP_PUTFH", |
b591480b | 1210 | }, |
eeac294e | 1211 | [OP_PUTPUBFH] = { |
a1c8c4d1 | 1212 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
27d630ec | 1213 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1214 | .op_name = "OP_PUTPUBFH", |
eeac294e | 1215 | }, |
b591480b BF |
1216 | [OP_PUTROOTFH] = { |
1217 | .op_func = (nfsd4op_func)nfsd4_putrootfh, | |
27d630ec | 1218 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1219 | .op_name = "OP_PUTROOTFH", |
b591480b BF |
1220 | }, |
1221 | [OP_READ] = { | |
1222 | .op_func = (nfsd4op_func)nfsd4_read, | |
b001a1b6 | 1223 | .op_name = "OP_READ", |
b591480b BF |
1224 | }, |
1225 | [OP_READDIR] = { | |
1226 | .op_func = (nfsd4op_func)nfsd4_readdir, | |
b001a1b6 | 1227 | .op_name = "OP_READDIR", |
b591480b BF |
1228 | }, |
1229 | [OP_READLINK] = { | |
1230 | .op_func = (nfsd4op_func)nfsd4_readlink, | |
b001a1b6 | 1231 | .op_name = "OP_READLINK", |
b591480b BF |
1232 | }, |
1233 | [OP_REMOVE] = { | |
1234 | .op_func = (nfsd4op_func)nfsd4_remove, | |
b001a1b6 | 1235 | .op_name = "OP_REMOVE", |
b591480b BF |
1236 | }, |
1237 | [OP_RENAME] = { | |
b001a1b6 | 1238 | .op_name = "OP_RENAME", |
b591480b BF |
1239 | .op_func = (nfsd4op_func)nfsd4_rename, |
1240 | }, | |
1241 | [OP_RENEW] = { | |
1242 | .op_func = (nfsd4op_func)nfsd4_renew, | |
27d630ec | 1243 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1244 | .op_name = "OP_RENEW", |
b591480b BF |
1245 | }, |
1246 | [OP_RESTOREFH] = { | |
1247 | .op_func = (nfsd4op_func)nfsd4_restorefh, | |
27d630ec | 1248 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1249 | .op_name = "OP_RESTOREFH", |
b591480b BF |
1250 | }, |
1251 | [OP_SAVEFH] = { | |
1252 | .op_func = (nfsd4op_func)nfsd4_savefh, | |
b001a1b6 | 1253 | .op_name = "OP_SAVEFH", |
b591480b | 1254 | }, |
dcb488a3 AA |
1255 | [OP_SECINFO] = { |
1256 | .op_func = (nfsd4op_func)nfsd4_secinfo, | |
b001a1b6 | 1257 | .op_name = "OP_SECINFO", |
dcb488a3 | 1258 | }, |
b591480b BF |
1259 | [OP_SETATTR] = { |
1260 | .op_func = (nfsd4op_func)nfsd4_setattr, | |
b001a1b6 | 1261 | .op_name = "OP_SETATTR", |
b591480b BF |
1262 | }, |
1263 | [OP_SETCLIENTID] = { | |
1264 | .op_func = (nfsd4op_func)nfsd4_setclientid, | |
27d630ec | 1265 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1266 | .op_name = "OP_SETCLIENTID", |
b591480b BF |
1267 | }, |
1268 | [OP_SETCLIENTID_CONFIRM] = { | |
1269 | .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, | |
27d630ec | 1270 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1271 | .op_name = "OP_SETCLIENTID_CONFIRM", |
b591480b BF |
1272 | }, |
1273 | [OP_VERIFY] = { | |
1274 | .op_func = (nfsd4op_func)nfsd4_verify, | |
b001a1b6 | 1275 | .op_name = "OP_VERIFY", |
b591480b BF |
1276 | }, |
1277 | [OP_WRITE] = { | |
1278 | .op_func = (nfsd4op_func)nfsd4_write, | |
b001a1b6 | 1279 | .op_name = "OP_WRITE", |
b591480b BF |
1280 | }, |
1281 | [OP_RELEASE_LOCKOWNER] = { | |
1282 | .op_func = (nfsd4op_func)nfsd4_release_lockowner, | |
27d630ec | 1283 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1284 | .op_name = "OP_RELEASE_LOCKOWNER", |
b591480b | 1285 | }, |
069b6ad4 AA |
1286 | |
1287 | /* NFSv4.1 operations */ | |
1288 | [OP_EXCHANGE_ID] = { | |
1289 | .op_func = (nfsd4op_func)nfsd4_exchange_id, | |
f9bb94c4 | 1290 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1291 | .op_name = "OP_EXCHANGE_ID", |
1292 | }, | |
1293 | [OP_CREATE_SESSION] = { | |
1294 | .op_func = (nfsd4op_func)nfsd4_create_session, | |
f9bb94c4 | 1295 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1296 | .op_name = "OP_CREATE_SESSION", |
1297 | }, | |
1298 | [OP_DESTROY_SESSION] = { | |
1299 | .op_func = (nfsd4op_func)nfsd4_destroy_session, | |
f9bb94c4 | 1300 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1301 | .op_name = "OP_DESTROY_SESSION", |
1302 | }, | |
1303 | [OP_SEQUENCE] = { | |
1304 | .op_func = (nfsd4op_func)nfsd4_sequence, | |
f9bb94c4 | 1305 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1306 | .op_name = "OP_SEQUENCE", |
1307 | }, | |
b591480b BF |
1308 | }; |
1309 | ||
f1c7f79b | 1310 | static const char *nfsd4_op_name(unsigned opnum) |
b001a1b6 BH |
1311 | { |
1312 | if (opnum < ARRAY_SIZE(nfsd4_ops)) | |
1313 | return nfsd4_ops[opnum].op_name; | |
1314 | return "unknown_operation"; | |
1315 | } | |
1316 | ||
1da177e4 | 1317 | #define nfsd4_voidres nfsd4_voidargs |
1da177e4 LT |
1318 | struct nfsd4_voidargs { int dummy; }; |
1319 | ||
1da177e4 LT |
1320 | /* |
1321 | * TODO: At the present time, the NFSv4 server does not do XID caching | |
1322 | * of requests. Implementing XID caching would not be a serious problem, | |
1323 | * although it would require a mild change in interfaces since one | |
1324 | * doesn't know whether an NFSv4 request is idempotent until after the | |
1325 | * XDR decode. However, XID caching totally confuses pynfs (Peter | |
1326 | * Astrand's regression testsuite for NFSv4 servers), which reuses | |
1327 | * XID's liberally, so I've left it unimplemented until pynfs generates | |
1328 | * better XID's. | |
1329 | */ | |
1330 | static struct svc_procedure nfsd_procedures4[2] = { | |
0a93a47f YZ |
1331 | [NFSPROC4_NULL] = { |
1332 | .pc_func = (svc_procfunc) nfsd4_proc_null, | |
1333 | .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, | |
1334 | .pc_argsize = sizeof(struct nfsd4_voidargs), | |
1335 | .pc_ressize = sizeof(struct nfsd4_voidres), | |
1336 | .pc_cachetype = RC_NOCACHE, | |
1337 | .pc_xdrressize = 1, | |
1338 | }, | |
1339 | [NFSPROC4_COMPOUND] = { | |
1340 | .pc_func = (svc_procfunc) nfsd4_proc_compound, | |
1341 | .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, | |
1342 | .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, | |
1343 | .pc_argsize = sizeof(struct nfsd4_compoundargs), | |
1344 | .pc_ressize = sizeof(struct nfsd4_compoundres), | |
1345 | .pc_cachetype = RC_NOCACHE, | |
1346 | .pc_xdrressize = NFSD_BUFSIZE/4, | |
1347 | }, | |
1da177e4 LT |
1348 | }; |
1349 | ||
1350 | struct svc_version nfsd_version4 = { | |
1351 | .vs_vers = 4, | |
1352 | .vs_nproc = 2, | |
1353 | .vs_proc = nfsd_procedures4, | |
1354 | .vs_dispatch = nfsd_dispatch, | |
1355 | .vs_xdrsize = NFS4_SVC_XDRSIZE, | |
1356 | }; | |
1357 | ||
1358 | /* | |
1359 | * Local variables: | |
1360 | * c-basic-offset: 8 | |
1361 | * End: | |
1362 | */ |