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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfsd/nfs4proc.c | |
3 | * | |
4 | * Server-side procedures for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
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 | ||
54 | static inline void | |
55 | fh_dup2(struct svc_fh *dst, struct svc_fh *src) | |
56 | { | |
57 | fh_put(dst); | |
58 | dget(src->fh_dentry); | |
59 | if (src->fh_export) | |
60 | cache_get(&src->fh_export->h); | |
61 | *dst = *src; | |
62 | } | |
63 | ||
b37ad28b | 64 | static __be32 |
dc730e17 | 65 | do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) |
1da177e4 | 66 | { |
b37ad28b | 67 | __be32 status; |
1da177e4 LT |
68 | |
69 | if (open->op_truncate && | |
70 | !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
71 | return nfserr_inval; | |
72 | ||
1da177e4 | 73 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 74 | accmode |= NFSD_MAY_READ; |
9801d8a3 | 75 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 76 | accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); |
9801d8a3 | 77 | if (open->op_share_deny & NFS4_SHARE_DENY_WRITE) |
8837abca | 78 | accmode |= NFSD_MAY_WRITE; |
1da177e4 LT |
79 | |
80 | status = fh_verify(rqstp, current_fh, S_IFREG, accmode); | |
81 | ||
82 | return status; | |
83 | } | |
84 | ||
b37ad28b | 85 | static __be32 |
1da177e4 LT |
86 | do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
87 | { | |
88 | struct svc_fh resfh; | |
b37ad28b | 89 | __be32 status; |
81ac95c5 | 90 | int created = 0; |
1da177e4 LT |
91 | |
92 | fh_init(&resfh, NFS4_FHSIZE); | |
93 | open->op_truncate = 0; | |
94 | ||
95 | if (open->op_create) { | |
79fb54ab BH |
96 | /* FIXME: check session persistence and pnfs flags. |
97 | * The nfsv4.1 spec requires the following semantics: | |
98 | * | |
99 | * Persistent | pNFS | Server REQUIRED | Client Allowed | |
100 | * Reply Cache | server | | | |
101 | * -------------+--------+-----------------+-------------------- | |
102 | * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 | |
103 | * | | | (SHOULD) | |
104 | * | | and EXCLUSIVE4 | or EXCLUSIVE4 | |
105 | * | | | (SHOULD NOT) | |
106 | * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 | |
107 | * yes | no | GUARDED4 | GUARDED4 | |
108 | * yes | yes | GUARDED4 | GUARDED4 | |
109 | */ | |
110 | ||
1da177e4 LT |
111 | /* |
112 | * Note: create modes (UNCHECKED,GUARDED...) are the same | |
113 | * in NFSv4 as in v3. | |
114 | */ | |
115 | status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, | |
116 | open->op_fname.len, &open->op_iattr, | |
117 | &resfh, open->op_createmode, | |
749997e5 JL |
118 | (u32 *)open->op_verf.data, |
119 | &open->op_truncate, &created); | |
120 | ||
99f88726 BF |
121 | /* |
122 | * Following rfc 3530 14.2.16, use the returned bitmask | |
123 | * to indicate which attributes we used to store the | |
124 | * verifier: | |
749997e5 JL |
125 | */ |
126 | if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) | |
99f88726 | 127 | open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | |
749997e5 | 128 | FATTR4_WORD1_TIME_MODIFY); |
af85852d | 129 | } else { |
1da177e4 LT |
130 | status = nfsd_lookup(rqstp, current_fh, |
131 | open->op_fname.data, open->op_fname.len, &resfh); | |
132 | fh_unlock(current_fh); | |
133 | } | |
af85852d BF |
134 | if (status) |
135 | goto out; | |
1da177e4 | 136 | |
af85852d | 137 | set_change_info(&open->op_cinfo, current_fh); |
13024b7b | 138 | fh_dup2(current_fh, &resfh); |
1da177e4 | 139 | |
af85852d | 140 | /* set reply cache */ |
a4773c08 BF |
141 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
142 | &resfh.fh_handle); | |
81ac95c5 | 143 | if (!created) |
8837abca MS |
144 | status = do_open_permission(rqstp, current_fh, open, |
145 | NFSD_MAY_NOP); | |
1da177e4 | 146 | |
af85852d | 147 | out: |
1da177e4 LT |
148 | fh_put(&resfh); |
149 | return status; | |
150 | } | |
151 | ||
b37ad28b | 152 | static __be32 |
1da177e4 LT |
153 | do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
154 | { | |
b37ad28b | 155 | __be32 status; |
1da177e4 LT |
156 | |
157 | /* Only reclaims from previously confirmed clients are valid */ | |
158 | if ((status = nfs4_check_open_reclaim(&open->op_clientid))) | |
159 | return status; | |
160 | ||
161 | /* We don't know the target directory, and therefore can not | |
162 | * set the change info | |
163 | */ | |
164 | ||
165 | memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); | |
166 | ||
167 | /* set replay cache */ | |
a4773c08 BF |
168 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
169 | ¤t_fh->fh_handle); | |
1da177e4 LT |
170 | |
171 | open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && | |
172 | (open->op_iattr.ia_size == 0); | |
173 | ||
8837abca MS |
174 | status = do_open_permission(rqstp, current_fh, open, |
175 | NFSD_MAY_OWNER_OVERRIDE); | |
1da177e4 LT |
176 | |
177 | return status; | |
178 | } | |
179 | ||
60adfc50 AA |
180 | static void |
181 | copy_clientid(clientid_t *clid, struct nfsd4_session *session) | |
182 | { | |
183 | struct nfsd4_sessionid *sid = | |
184 | (struct nfsd4_sessionid *)session->se_sessionid.data; | |
185 | ||
186 | clid->cl_boot = sid->clientid.cl_boot; | |
187 | clid->cl_id = sid->clientid.cl_id; | |
188 | } | |
1da177e4 | 189 | |
7191155b | 190 | static __be32 |
ca364317 | 191 | nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 192 | struct nfsd4_open *open) |
1da177e4 | 193 | { |
b37ad28b | 194 | __be32 status; |
6668958f AA |
195 | struct nfsd4_compoundres *resp; |
196 | ||
1da177e4 LT |
197 | dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", |
198 | (int)open->op_fname.len, open->op_fname.data, | |
199 | open->op_stateowner); | |
200 | ||
1da177e4 LT |
201 | /* This check required by spec. */ |
202 | if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) | |
203 | return nfserr_inval; | |
204 | ||
60adfc50 AA |
205 | if (nfsd4_has_session(cstate)) |
206 | copy_clientid(&open->op_clientid, cstate->session); | |
207 | ||
1da177e4 LT |
208 | nfs4_lock_state(); |
209 | ||
210 | /* check seqid for replay. set nfs4_owner */ | |
6668958f AA |
211 | resp = rqstp->rq_resp; |
212 | status = nfsd4_process_open1(&resp->cstate, open); | |
a90b061c | 213 | if (status == nfserr_replay_me) { |
1da177e4 | 214 | struct nfs4_replay *rp = &open->op_stateowner->so_replay; |
ca364317 | 215 | fh_put(&cstate->current_fh); |
a4773c08 BF |
216 | fh_copy_shallow(&cstate->current_fh.fh_handle, |
217 | &rp->rp_openfh); | |
8837abca | 218 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
219 | if (status) |
220 | dprintk("nfsd4_open: replay failed" | |
221 | " restoring previous filehandle\n"); | |
222 | else | |
a90b061c | 223 | status = nfserr_replay_me; |
1da177e4 LT |
224 | } |
225 | if (status) | |
226 | goto out; | |
fb553c0f BF |
227 | |
228 | /* Openowner is now set, so sequence id will get bumped. Now we need | |
229 | * these checks before we do any creates: */ | |
cbd0d51a | 230 | status = nfserr_grace; |
af558e33 | 231 | if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a BF |
232 | goto out; |
233 | status = nfserr_no_grace; | |
af558e33 | 234 | if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a | 235 | goto out; |
fb553c0f | 236 | |
1da177e4 | 237 | switch (open->op_claim_type) { |
0dd3c192 | 238 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
1da177e4 LT |
239 | case NFS4_OPEN_CLAIM_NULL: |
240 | /* | |
241 | * (1) set CURRENT_FH to the file being opened, | |
242 | * creating it if necessary, (2) set open->op_cinfo, | |
243 | * (3) set open->op_truncate if the file is to be | |
244 | * truncated after opening, (4) do permission checking. | |
245 | */ | |
ca364317 BF |
246 | status = do_open_lookup(rqstp, &cstate->current_fh, |
247 | open); | |
1da177e4 LT |
248 | if (status) |
249 | goto out; | |
250 | break; | |
251 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
a525825d | 252 | open->op_stateowner->so_confirmed = 1; |
1da177e4 LT |
253 | /* |
254 | * The CURRENT_FH is already set to the file being | |
255 | * opened. (1) set open->op_cinfo, (2) set | |
256 | * open->op_truncate if the file is to be truncated | |
257 | * after opening, (3) do permission checking. | |
258 | */ | |
ca364317 BF |
259 | status = do_open_fhandle(rqstp, &cstate->current_fh, |
260 | open); | |
1da177e4 LT |
261 | if (status) |
262 | goto out; | |
263 | break; | |
1da177e4 | 264 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
a525825d | 265 | open->op_stateowner->so_confirmed = 1; |
2fdada03 | 266 | dprintk("NFSD: unsupported OPEN claim type %d\n", |
1da177e4 LT |
267 | open->op_claim_type); |
268 | status = nfserr_notsupp; | |
269 | goto out; | |
270 | default: | |
2fdada03 | 271 | dprintk("NFSD: Invalid OPEN claim type %d\n", |
1da177e4 LT |
272 | open->op_claim_type); |
273 | status = nfserr_inval; | |
274 | goto out; | |
275 | } | |
276 | /* | |
277 | * nfsd4_process_open2() does the actual opening of the file. If | |
278 | * successful, it (1) truncates the file if open->op_truncate was | |
279 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. | |
280 | */ | |
ca364317 | 281 | status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); |
1da177e4 | 282 | out: |
f2327d9a | 283 | if (open->op_stateowner) { |
1da177e4 | 284 | nfs4_get_stateowner(open->op_stateowner); |
a4f1706a | 285 | cstate->replay_owner = open->op_stateowner; |
f2327d9a | 286 | } |
1da177e4 LT |
287 | nfs4_unlock_state(); |
288 | return status; | |
289 | } | |
290 | ||
291 | /* | |
292 | * filehandle-manipulating ops. | |
293 | */ | |
7191155b | 294 | static __be32 |
b591480b BF |
295 | nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
296 | struct svc_fh **getfh) | |
1da177e4 | 297 | { |
ca364317 | 298 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
299 | return nfserr_nofilehandle; |
300 | ||
ca364317 | 301 | *getfh = &cstate->current_fh; |
1da177e4 LT |
302 | return nfs_ok; |
303 | } | |
304 | ||
7191155b | 305 | static __be32 |
ca364317 BF |
306 | nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
307 | struct nfsd4_putfh *putfh) | |
1da177e4 | 308 | { |
ca364317 BF |
309 | fh_put(&cstate->current_fh); |
310 | cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; | |
311 | memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, | |
312 | putfh->pf_fhlen); | |
8837abca | 313 | return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
314 | } |
315 | ||
7191155b | 316 | static __be32 |
b591480b BF |
317 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
318 | void *arg) | |
1da177e4 | 319 | { |
b37ad28b | 320 | __be32 status; |
1da177e4 | 321 | |
ca364317 | 322 | fh_put(&cstate->current_fh); |
df547efb | 323 | status = exp_pseudoroot(rqstp, &cstate->current_fh); |
1da177e4 LT |
324 | return status; |
325 | } | |
326 | ||
7191155b | 327 | static __be32 |
b591480b BF |
328 | nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
329 | void *arg) | |
1da177e4 | 330 | { |
ca364317 | 331 | if (!cstate->save_fh.fh_dentry) |
1da177e4 LT |
332 | return nfserr_restorefh; |
333 | ||
ca364317 | 334 | fh_dup2(&cstate->current_fh, &cstate->save_fh); |
1da177e4 LT |
335 | return nfs_ok; |
336 | } | |
337 | ||
7191155b | 338 | static __be32 |
b591480b BF |
339 | nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
340 | void *arg) | |
1da177e4 | 341 | { |
ca364317 | 342 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
343 | return nfserr_nofilehandle; |
344 | ||
ca364317 | 345 | fh_dup2(&cstate->save_fh, &cstate->current_fh); |
1da177e4 LT |
346 | return nfs_ok; |
347 | } | |
348 | ||
349 | /* | |
350 | * misc nfsv4 ops | |
351 | */ | |
7191155b | 352 | static __be32 |
ca364317 BF |
353 | nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
354 | struct nfsd4_access *access) | |
1da177e4 LT |
355 | { |
356 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) | |
357 | return nfserr_inval; | |
358 | ||
359 | access->ac_resp_access = access->ac_req_access; | |
ca364317 BF |
360 | return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
361 | &access->ac_supported); | |
1da177e4 LT |
362 | } |
363 | ||
7191155b | 364 | static __be32 |
ca364317 BF |
365 | nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
366 | struct nfsd4_commit *commit) | |
1da177e4 | 367 | { |
b37ad28b | 368 | __be32 status; |
1da177e4 LT |
369 | |
370 | u32 *p = (u32 *)commit->co_verf.data; | |
371 | *p++ = nfssvc_boot.tv_sec; | |
372 | *p++ = nfssvc_boot.tv_usec; | |
373 | ||
ca364317 BF |
374 | status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
375 | commit->co_count); | |
1da177e4 LT |
376 | if (status == nfserr_symlink) |
377 | status = nfserr_inval; | |
378 | return status; | |
379 | } | |
380 | ||
b37ad28b | 381 | static __be32 |
ca364317 BF |
382 | nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
383 | struct nfsd4_create *create) | |
1da177e4 LT |
384 | { |
385 | struct svc_fh resfh; | |
b37ad28b | 386 | __be32 status; |
1da177e4 LT |
387 | dev_t rdev; |
388 | ||
389 | fh_init(&resfh, NFS4_FHSIZE); | |
390 | ||
8837abca MS |
391 | status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, |
392 | NFSD_MAY_CREATE); | |
1da177e4 LT |
393 | if (status == nfserr_symlink) |
394 | status = nfserr_notdir; | |
395 | if (status) | |
396 | return status; | |
397 | ||
398 | switch (create->cr_type) { | |
399 | case NF4LNK: | |
400 | /* ugh! we have to null-terminate the linktext, or | |
401 | * vfs_symlink() will choke. it is always safe to | |
402 | * null-terminate by brute force, since at worst we | |
403 | * will overwrite the first byte of the create namelen | |
404 | * in the XDR buffer, which has already been extracted | |
405 | * during XDR decode. | |
406 | */ | |
407 | create->cr_linkname[create->cr_linklen] = 0; | |
408 | ||
ca364317 BF |
409 | status = nfsd_symlink(rqstp, &cstate->current_fh, |
410 | create->cr_name, create->cr_namelen, | |
411 | create->cr_linkname, create->cr_linklen, | |
412 | &resfh, &create->cr_iattr); | |
1da177e4 LT |
413 | break; |
414 | ||
415 | case NF4BLK: | |
416 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
417 | if (MAJOR(rdev) != create->cr_specdata1 || | |
418 | MINOR(rdev) != create->cr_specdata2) | |
419 | return nfserr_inval; | |
ca364317 BF |
420 | status = nfsd_create(rqstp, &cstate->current_fh, |
421 | create->cr_name, create->cr_namelen, | |
422 | &create->cr_iattr, S_IFBLK, rdev, &resfh); | |
1da177e4 LT |
423 | break; |
424 | ||
425 | case NF4CHR: | |
426 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
427 | if (MAJOR(rdev) != create->cr_specdata1 || | |
428 | MINOR(rdev) != create->cr_specdata2) | |
429 | return nfserr_inval; | |
ca364317 BF |
430 | status = nfsd_create(rqstp, &cstate->current_fh, |
431 | create->cr_name, create->cr_namelen, | |
432 | &create->cr_iattr,S_IFCHR, rdev, &resfh); | |
1da177e4 LT |
433 | break; |
434 | ||
435 | case NF4SOCK: | |
ca364317 BF |
436 | status = nfsd_create(rqstp, &cstate->current_fh, |
437 | create->cr_name, create->cr_namelen, | |
438 | &create->cr_iattr, S_IFSOCK, 0, &resfh); | |
1da177e4 LT |
439 | break; |
440 | ||
441 | case NF4FIFO: | |
ca364317 BF |
442 | status = nfsd_create(rqstp, &cstate->current_fh, |
443 | create->cr_name, create->cr_namelen, | |
444 | &create->cr_iattr, S_IFIFO, 0, &resfh); | |
1da177e4 LT |
445 | break; |
446 | ||
447 | case NF4DIR: | |
448 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; | |
ca364317 BF |
449 | status = nfsd_create(rqstp, &cstate->current_fh, |
450 | create->cr_name, create->cr_namelen, | |
451 | &create->cr_iattr, S_IFDIR, 0, &resfh); | |
1da177e4 LT |
452 | break; |
453 | ||
454 | default: | |
455 | status = nfserr_badtype; | |
456 | } | |
457 | ||
458 | if (!status) { | |
ca364317 BF |
459 | fh_unlock(&cstate->current_fh); |
460 | set_change_info(&create->cr_cinfo, &cstate->current_fh); | |
461 | fh_dup2(&cstate->current_fh, &resfh); | |
1da177e4 LT |
462 | } |
463 | ||
464 | fh_put(&resfh); | |
465 | return status; | |
466 | } | |
467 | ||
7191155b | 468 | static __be32 |
ca364317 BF |
469 | nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
470 | struct nfsd4_getattr *getattr) | |
1da177e4 | 471 | { |
b37ad28b | 472 | __be32 status; |
1da177e4 | 473 | |
8837abca | 474 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
475 | if (status) |
476 | return status; | |
477 | ||
478 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
479 | return nfserr_inval; | |
480 | ||
7e705706 AA |
481 | getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
482 | getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); | |
483 | getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); | |
1da177e4 | 484 | |
ca364317 | 485 | getattr->ga_fhp = &cstate->current_fh; |
1da177e4 LT |
486 | return nfs_ok; |
487 | } | |
488 | ||
7191155b | 489 | static __be32 |
ca364317 BF |
490 | nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
491 | struct nfsd4_link *link) | |
1da177e4 | 492 | { |
b37ad28b | 493 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 494 | |
ca364317 | 495 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 496 | return status; |
ca364317 BF |
497 | status = nfsd_link(rqstp, &cstate->current_fh, |
498 | link->li_name, link->li_namelen, &cstate->save_fh); | |
1da177e4 | 499 | if (!status) |
ca364317 | 500 | set_change_info(&link->li_cinfo, &cstate->current_fh); |
1da177e4 LT |
501 | return status; |
502 | } | |
503 | ||
b37ad28b | 504 | static __be32 |
b591480b BF |
505 | nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
506 | void *arg) | |
1da177e4 LT |
507 | { |
508 | struct svc_fh tmp_fh; | |
b37ad28b | 509 | __be32 ret; |
1da177e4 LT |
510 | |
511 | fh_init(&tmp_fh, NFS4_FHSIZE); | |
df547efb BF |
512 | ret = exp_pseudoroot(rqstp, &tmp_fh); |
513 | if (ret) | |
1da177e4 | 514 | return ret; |
ca364317 | 515 | if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { |
1da177e4 LT |
516 | fh_put(&tmp_fh); |
517 | return nfserr_noent; | |
518 | } | |
519 | fh_put(&tmp_fh); | |
ca364317 BF |
520 | return nfsd_lookup(rqstp, &cstate->current_fh, |
521 | "..", 2, &cstate->current_fh); | |
1da177e4 LT |
522 | } |
523 | ||
7191155b | 524 | static __be32 |
ca364317 BF |
525 | nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
526 | struct nfsd4_lookup *lookup) | |
1da177e4 | 527 | { |
ca364317 BF |
528 | return nfsd_lookup(rqstp, &cstate->current_fh, |
529 | lookup->lo_name, lookup->lo_len, | |
530 | &cstate->current_fh); | |
1da177e4 LT |
531 | } |
532 | ||
7191155b | 533 | static __be32 |
ca364317 BF |
534 | nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
535 | struct nfsd4_read *read) | |
1da177e4 | 536 | { |
b37ad28b | 537 | __be32 status; |
1da177e4 LT |
538 | |
539 | /* no need to check permission - this will be done in nfsd_read() */ | |
540 | ||
7e06b7f9 | 541 | read->rd_filp = NULL; |
1da177e4 LT |
542 | if (read->rd_offset >= OFFSET_MAX) |
543 | return nfserr_inval; | |
544 | ||
545 | nfs4_lock_state(); | |
546 | /* check stateid */ | |
dd453dfd BH |
547 | if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, |
548 | RD_STATE, &read->rd_filp))) { | |
1da177e4 LT |
549 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
550 | goto out; | |
551 | } | |
7e06b7f9 N |
552 | if (read->rd_filp) |
553 | get_file(read->rd_filp); | |
1da177e4 LT |
554 | status = nfs_ok; |
555 | out: | |
556 | nfs4_unlock_state(); | |
557 | read->rd_rqstp = rqstp; | |
ca364317 | 558 | read->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
559 | return status; |
560 | } | |
561 | ||
7191155b | 562 | static __be32 |
ca364317 BF |
563 | nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
564 | struct nfsd4_readdir *readdir) | |
1da177e4 LT |
565 | { |
566 | u64 cookie = readdir->rd_cookie; | |
567 | static const nfs4_verifier zeroverf; | |
568 | ||
569 | /* no need to check permission - this will be done in nfsd_readdir() */ | |
570 | ||
571 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
572 | return nfserr_inval; | |
573 | ||
7e705706 AA |
574 | readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); |
575 | readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); | |
576 | readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); | |
1da177e4 LT |
577 | |
578 | if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || | |
579 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) | |
580 | return nfserr_bad_cookie; | |
581 | ||
582 | readdir->rd_rqstp = rqstp; | |
ca364317 | 583 | readdir->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
584 | return nfs_ok; |
585 | } | |
586 | ||
7191155b | 587 | static __be32 |
ca364317 BF |
588 | nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
589 | struct nfsd4_readlink *readlink) | |
1da177e4 LT |
590 | { |
591 | readlink->rl_rqstp = rqstp; | |
ca364317 | 592 | readlink->rl_fhp = &cstate->current_fh; |
1da177e4 LT |
593 | return nfs_ok; |
594 | } | |
595 | ||
7191155b | 596 | static __be32 |
ca364317 BF |
597 | nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
598 | struct nfsd4_remove *remove) | |
1da177e4 | 599 | { |
b37ad28b | 600 | __be32 status; |
1da177e4 | 601 | |
af558e33 | 602 | if (locks_in_grace()) |
c815afc7 | 603 | return nfserr_grace; |
ca364317 BF |
604 | status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
605 | remove->rm_name, remove->rm_namelen); | |
1da177e4 LT |
606 | if (status == nfserr_symlink) |
607 | return nfserr_notdir; | |
608 | if (!status) { | |
ca364317 BF |
609 | fh_unlock(&cstate->current_fh); |
610 | set_change_info(&remove->rm_cinfo, &cstate->current_fh); | |
1da177e4 LT |
611 | } |
612 | return status; | |
613 | } | |
614 | ||
7191155b | 615 | static __be32 |
ca364317 BF |
616 | nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
617 | struct nfsd4_rename *rename) | |
1da177e4 | 618 | { |
b37ad28b | 619 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 620 | |
ca364317 | 621 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 622 | return status; |
af558e33 | 623 | if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags |
c815afc7 N |
624 | & NFSEXP_NOSUBTREECHECK)) |
625 | return nfserr_grace; | |
ca364317 BF |
626 | status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
627 | rename->rn_snamelen, &cstate->current_fh, | |
1da177e4 LT |
628 | rename->rn_tname, rename->rn_tnamelen); |
629 | ||
630 | /* the underlying filesystem returns different error's than required | |
631 | * by NFSv4. both save_fh and current_fh have been verified.. */ | |
632 | if (status == nfserr_isdir) | |
633 | status = nfserr_exist; | |
634 | else if ((status == nfserr_notdir) && | |
ca364317 BF |
635 | (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && |
636 | S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) | |
1da177e4 LT |
637 | status = nfserr_exist; |
638 | else if (status == nfserr_symlink) | |
639 | status = nfserr_notdir; | |
640 | ||
641 | if (!status) { | |
ca364317 BF |
642 | set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
643 | set_change_info(&rename->rn_tinfo, &cstate->save_fh); | |
1da177e4 LT |
644 | } |
645 | return status; | |
646 | } | |
647 | ||
dcb488a3 AA |
648 | static __be32 |
649 | nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
650 | struct nfsd4_secinfo *secinfo) | |
651 | { | |
652 | struct svc_fh resfh; | |
653 | struct svc_export *exp; | |
654 | struct dentry *dentry; | |
655 | __be32 err; | |
656 | ||
657 | fh_init(&resfh, NFS4_FHSIZE); | |
658 | err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, | |
659 | secinfo->si_name, secinfo->si_namelen, | |
660 | &exp, &dentry); | |
661 | if (err) | |
662 | return err; | |
663 | if (dentry->d_inode == NULL) { | |
664 | exp_put(exp); | |
665 | err = nfserr_noent; | |
666 | } else | |
667 | secinfo->si_exp = exp; | |
668 | dput(dentry); | |
669 | return err; | |
670 | } | |
671 | ||
7191155b | 672 | static __be32 |
ca364317 BF |
673 | nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
674 | struct nfsd4_setattr *setattr) | |
1da177e4 | 675 | { |
b37ad28b | 676 | __be32 status = nfs_ok; |
1da177e4 | 677 | |
1da177e4 LT |
678 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
679 | nfs4_lock_state(); | |
dd453dfd | 680 | status = nfs4_preprocess_stateid_op(cstate, |
6150ef0d | 681 | &setattr->sa_stateid, WR_STATE, NULL); |
1da177e4 | 682 | nfs4_unlock_state(); |
375c5547 | 683 | if (status) { |
3e3b4800 | 684 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
375c5547 BF |
685 | return status; |
686 | } | |
1da177e4 | 687 | } |
18f335af DH |
688 | status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); |
689 | if (status) | |
690 | return status; | |
1da177e4 LT |
691 | status = nfs_ok; |
692 | if (setattr->sa_acl != NULL) | |
ca364317 BF |
693 | status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
694 | setattr->sa_acl); | |
1da177e4 | 695 | if (status) |
18f335af | 696 | goto out; |
ca364317 | 697 | status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
1da177e4 | 698 | 0, (time_t)0); |
18f335af DH |
699 | out: |
700 | mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); | |
1da177e4 LT |
701 | return status; |
702 | } | |
703 | ||
7191155b | 704 | static __be32 |
ca364317 BF |
705 | nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
706 | struct nfsd4_write *write) | |
1da177e4 LT |
707 | { |
708 | stateid_t *stateid = &write->wr_stateid; | |
709 | struct file *filp = NULL; | |
710 | u32 *p; | |
b37ad28b | 711 | __be32 status = nfs_ok; |
31dec253 | 712 | unsigned long cnt; |
1da177e4 LT |
713 | |
714 | /* no need to check permission - this will be done in nfsd_write() */ | |
715 | ||
716 | if (write->wr_offset >= OFFSET_MAX) | |
717 | return nfserr_inval; | |
718 | ||
719 | nfs4_lock_state(); | |
dd453dfd | 720 | status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); |
7e06b7f9 N |
721 | if (filp) |
722 | get_file(filp); | |
1da177e4 LT |
723 | nfs4_unlock_state(); |
724 | ||
375c5547 BF |
725 | if (status) { |
726 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); | |
727 | return status; | |
728 | } | |
729 | ||
31dec253 | 730 | cnt = write->wr_buflen; |
1da177e4 LT |
731 | write->wr_how_written = write->wr_stable_how; |
732 | p = (u32 *)write->wr_verifier.data; | |
733 | *p++ = nfssvc_boot.tv_sec; | |
734 | *p++ = nfssvc_boot.tv_usec; | |
735 | ||
ca364317 BF |
736 | status = nfsd_write(rqstp, &cstate->current_fh, filp, |
737 | write->wr_offset, rqstp->rq_vec, write->wr_vlen, | |
31dec253 | 738 | &cnt, &write->wr_how_written); |
7e06b7f9 N |
739 | if (filp) |
740 | fput(filp); | |
1da177e4 | 741 | |
31dec253 DS |
742 | write->wr_bytes_written = cnt; |
743 | ||
1da177e4 LT |
744 | if (status == nfserr_symlink) |
745 | status = nfserr_inval; | |
746 | return status; | |
1da177e4 LT |
747 | } |
748 | ||
749 | /* This routine never returns NFS_OK! If there are no other errors, it | |
750 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the | |
751 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME | |
752 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. | |
753 | */ | |
b37ad28b | 754 | static __be32 |
c954e2a5 | 755 | _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
ca364317 | 756 | struct nfsd4_verify *verify) |
1da177e4 | 757 | { |
2ebbc012 | 758 | __be32 *buf, *p; |
1da177e4 | 759 | int count; |
b37ad28b | 760 | __be32 status; |
1da177e4 | 761 | |
8837abca | 762 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
763 | if (status) |
764 | return status; | |
765 | ||
7e705706 AA |
766 | if ((verify->ve_bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) |
767 | || (verify->ve_bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) | |
768 | || (verify->ve_bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) | |
1da177e4 LT |
769 | return nfserr_attrnotsupp; |
770 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) | |
771 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) | |
772 | return nfserr_inval; | |
773 | if (verify->ve_attrlen & 3) | |
774 | return nfserr_inval; | |
775 | ||
776 | /* count in words: | |
777 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 | |
778 | */ | |
779 | count = 4 + (verify->ve_attrlen >> 2); | |
780 | buf = kmalloc(count << 2, GFP_KERNEL); | |
781 | if (!buf) | |
782 | return nfserr_resource; | |
783 | ||
ca364317 BF |
784 | status = nfsd4_encode_fattr(&cstate->current_fh, |
785 | cstate->current_fh.fh_export, | |
786 | cstate->current_fh.fh_dentry, buf, | |
1da177e4 | 787 | &count, verify->ve_bmval, |
406a7ea9 | 788 | rqstp, 0); |
1da177e4 LT |
789 | |
790 | /* this means that nfsd4_encode_fattr() ran out of space */ | |
791 | if (status == nfserr_resource && count == 0) | |
792 | status = nfserr_not_same; | |
793 | if (status) | |
794 | goto out_kfree; | |
795 | ||
95ec28cd BH |
796 | /* skip bitmap */ |
797 | p = buf + 1 + ntohl(buf[0]); | |
1da177e4 LT |
798 | status = nfserr_not_same; |
799 | if (ntohl(*p++) != verify->ve_attrlen) | |
800 | goto out_kfree; | |
801 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) | |
802 | status = nfserr_same; | |
803 | ||
804 | out_kfree: | |
805 | kfree(buf); | |
806 | return status; | |
807 | } | |
808 | ||
c954e2a5 BF |
809 | static __be32 |
810 | nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
811 | struct nfsd4_verify *verify) | |
812 | { | |
813 | __be32 status; | |
814 | ||
815 | status = _nfsd4_verify(rqstp, cstate, verify); | |
816 | return status == nfserr_not_same ? nfs_ok : status; | |
817 | } | |
818 | ||
819 | static __be32 | |
820 | nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
821 | struct nfsd4_verify *verify) | |
822 | { | |
823 | __be32 status; | |
824 | ||
825 | status = _nfsd4_verify(rqstp, cstate, verify); | |
826 | return status == nfserr_same ? nfs_ok : status; | |
827 | } | |
828 | ||
1da177e4 LT |
829 | /* |
830 | * NULL call. | |
831 | */ | |
7111c66e | 832 | static __be32 |
1da177e4 LT |
833 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
834 | { | |
835 | return nfs_ok; | |
836 | } | |
837 | ||
e2b20950 SA |
838 | static inline void nfsd4_increment_op_stats(u32 opnum) |
839 | { | |
840 | if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) | |
841 | nfsdstats.nfs4_opcount[opnum]++; | |
842 | } | |
843 | ||
b591480b BF |
844 | typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
845 | void *); | |
f9bb94c4 AA |
846 | enum nfsd4_op_flags { |
847 | ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ | |
848 | ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ | |
849 | ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ | |
850 | }; | |
b591480b BF |
851 | |
852 | struct nfsd4_operation { | |
853 | nfsd4op_func op_func; | |
854 | u32 op_flags; | |
b001a1b6 | 855 | char *op_name; |
b591480b BF |
856 | }; |
857 | ||
858 | static struct nfsd4_operation nfsd4_ops[]; | |
859 | ||
f1c7f79b | 860 | static const char *nfsd4_op_name(unsigned opnum); |
b001a1b6 | 861 | |
bf864a31 AA |
862 | /* |
863 | * This is a replay of a compound for which no cache entry pages | |
864 | * were used. Encode the sequence operation, and if cachethis is FALSE | |
865 | * encode the uncache rep error on the next operation. | |
866 | */ | |
867 | static __be32 | |
868 | nfsd4_enc_uncached_replay(struct nfsd4_compoundargs *args, | |
869 | struct nfsd4_compoundres *resp) | |
870 | { | |
871 | struct nfsd4_op *op; | |
872 | ||
873 | dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__, | |
874 | resp->opcnt, resp->cstate.slot->sl_cache_entry.ce_cachethis); | |
875 | ||
876 | /* Encode the replayed sequence operation */ | |
877 | BUG_ON(resp->opcnt != 1); | |
878 | op = &args->ops[resp->opcnt - 1]; | |
879 | nfsd4_encode_operation(resp, op); | |
880 | ||
881 | /*return nfserr_retry_uncached_rep in next operation. */ | |
882 | if (resp->cstate.slot->sl_cache_entry.ce_cachethis == 0) { | |
883 | op = &args->ops[resp->opcnt++]; | |
884 | op->status = nfserr_retry_uncached_rep; | |
885 | nfsd4_encode_operation(resp, op); | |
886 | } | |
887 | return op->status; | |
888 | } | |
889 | ||
f9bb94c4 AA |
890 | /* |
891 | * Enforce NFSv4.1 COMPOUND ordering rules. | |
892 | * | |
893 | * TODO: | |
894 | * - enforce NFS4ERR_NOT_ONLY_OP, | |
895 | * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. | |
896 | */ | |
897 | static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) | |
898 | { | |
899 | if (args->minorversion && args->opcnt > 0) { | |
900 | struct nfsd4_op *op = &args->ops[0]; | |
901 | return (op->status == nfserr_op_illegal) || | |
902 | (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); | |
903 | } | |
904 | return true; | |
905 | } | |
906 | ||
1da177e4 LT |
907 | /* |
908 | * COMPOUND call. | |
909 | */ | |
7111c66e | 910 | static __be32 |
1da177e4 LT |
911 | nfsd4_proc_compound(struct svc_rqst *rqstp, |
912 | struct nfsd4_compoundargs *args, | |
913 | struct nfsd4_compoundres *resp) | |
914 | { | |
915 | struct nfsd4_op *op; | |
b591480b | 916 | struct nfsd4_operation *opdesc; |
e354d571 | 917 | struct nfsd4_compound_state *cstate = &resp->cstate; |
e5710199 | 918 | int slack_bytes; |
b37ad28b | 919 | __be32 status; |
1da177e4 | 920 | |
1da177e4 | 921 | resp->xbuf = &rqstp->rq_res; |
e354d571 AA |
922 | resp->p = rqstp->rq_res.head[0].iov_base + |
923 | rqstp->rq_res.head[0].iov_len; | |
1da177e4 LT |
924 | resp->tagp = resp->p; |
925 | /* reserve space for: taglen, tag, and opcnt */ | |
926 | resp->p += 2 + XDR_QUADLEN(args->taglen); | |
927 | resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; | |
928 | resp->taglen = args->taglen; | |
929 | resp->tag = args->tag; | |
930 | resp->opcnt = 0; | |
931 | resp->rqstp = rqstp; | |
d87a8ade | 932 | resp->cstate.minorversion = args->minorversion; |
e354d571 AA |
933 | resp->cstate.replay_owner = NULL; |
934 | fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); | |
935 | fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); | |
2f425878 AA |
936 | /* Use the deferral mechanism only for NFSv4.0 compounds */ |
937 | rqstp->rq_usedeferral = (args->minorversion == 0); | |
1da177e4 LT |
938 | |
939 | /* | |
940 | * According to RFC3010, this takes precedence over all other errors. | |
941 | */ | |
942 | status = nfserr_minor_vers_mismatch; | |
8daf220a | 943 | if (args->minorversion > nfsd_supported_minorversion) |
1da177e4 LT |
944 | goto out; |
945 | ||
f9bb94c4 AA |
946 | if (!nfs41_op_ordering_ok(args)) { |
947 | op = &args->ops[0]; | |
948 | op->status = nfserr_sequence_pos; | |
949 | goto encode_op; | |
950 | } | |
951 | ||
1da177e4 LT |
952 | status = nfs_ok; |
953 | while (!status && resp->opcnt < args->opcnt) { | |
954 | op = &args->ops[resp->opcnt++]; | |
955 | ||
b001a1b6 BH |
956 | dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", |
957 | resp->opcnt, args->opcnt, op->opnum, | |
958 | nfsd4_op_name(op->opnum)); | |
1da177e4 LT |
959 | /* |
960 | * The XDR decode routines may have pre-set op->status; | |
961 | * for example, if there is a miscellaneous XDR error | |
962 | * it will be set to nfserr_bad_xdr. | |
963 | */ | |
964 | if (op->status) | |
965 | goto encode_op; | |
966 | ||
967 | /* We must be able to encode a successful response to | |
968 | * this operation, with enough room left over to encode a | |
969 | * failed response to the next operation. If we don't | |
970 | * have enough room, fail with ERR_RESOURCE. | |
971 | */ | |
e5710199 BF |
972 | slack_bytes = (char *)resp->end - (char *)resp->p; |
973 | if (slack_bytes < COMPOUND_SLACK_SPACE | |
974 | + COMPOUND_ERR_SLACK_SPACE) { | |
975 | BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); | |
1da177e4 LT |
976 | op->status = nfserr_resource; |
977 | goto encode_op; | |
978 | } | |
979 | ||
b591480b BF |
980 | opdesc = &nfsd4_ops[op->opnum]; |
981 | ||
ca364317 | 982 | if (!cstate->current_fh.fh_dentry) { |
27d630ec | 983 | if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
42ca0993 BF |
984 | op->status = nfserr_nofilehandle; |
985 | goto encode_op; | |
986 | } | |
eeac294e BF |
987 | } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && |
988 | !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { | |
42ca0993 | 989 | op->status = nfserr_moved; |
1da177e4 LT |
990 | goto encode_op; |
991 | } | |
b591480b BF |
992 | |
993 | if (opdesc->op_func) | |
994 | op->status = opdesc->op_func(rqstp, cstate, &op->u); | |
995 | else | |
1da177e4 | 996 | BUG_ON(op->status == nfs_ok); |
1da177e4 LT |
997 | |
998 | encode_op: | |
da3846a2 AA |
999 | /* Only from SEQUENCE or CREATE_SESSION */ |
1000 | if (resp->cstate.status == nfserr_replay_cache) { | |
1001 | dprintk("%s NFS4.1 replay from cache\n", __func__); | |
bf864a31 AA |
1002 | if (nfsd4_not_cached(resp)) |
1003 | status = nfsd4_enc_uncached_replay(args, resp); | |
1004 | else | |
1005 | status = op->status; | |
da3846a2 AA |
1006 | goto out; |
1007 | } | |
a90b061c | 1008 | if (op->status == nfserr_replay_me) { |
a4f1706a | 1009 | op->replay = &cstate->replay_owner->so_replay; |
1da177e4 LT |
1010 | nfsd4_encode_replay(resp, op); |
1011 | status = op->status = op->replay->rp_status; | |
1012 | } else { | |
1013 | nfsd4_encode_operation(resp, op); | |
1014 | status = op->status; | |
1015 | } | |
0407717d BH |
1016 | |
1017 | dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", | |
1018 | args->ops, args->opcnt, resp->opcnt, op->opnum, | |
1019 | be32_to_cpu(status)); | |
1020 | ||
a4f1706a BF |
1021 | if (cstate->replay_owner) { |
1022 | nfs4_put_stateowner(cstate->replay_owner); | |
1023 | cstate->replay_owner = NULL; | |
1da177e4 | 1024 | } |
7e06b7f9 N |
1025 | /* XXX Ugh, we need to get rid of this kind of special case: */ |
1026 | if (op->opnum == OP_READ && op->u.read.rd_filp) | |
1027 | fput(op->u.read.rd_filp); | |
e2b20950 SA |
1028 | |
1029 | nfsd4_increment_op_stats(op->opnum); | |
1da177e4 | 1030 | } |
2f425878 AA |
1031 | if (!rqstp->rq_usedeferral && status == nfserr_dropit) { |
1032 | dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); | |
1033 | status = nfserr_jukebox; | |
1034 | } | |
1da177e4 | 1035 | |
da3846a2 | 1036 | resp->cstate.status = status; |
e354d571 AA |
1037 | fh_put(&resp->cstate.current_fh); |
1038 | fh_put(&resp->cstate.save_fh); | |
1039 | BUG_ON(resp->cstate.replay_owner); | |
1da177e4 LT |
1040 | out: |
1041 | nfsd4_release_compoundargs(args); | |
2f425878 AA |
1042 | /* Reset deferral mechanism for RPC deferrals */ |
1043 | rqstp->rq_usedeferral = 1; | |
3b12cd98 | 1044 | dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
1da177e4 LT |
1045 | return status; |
1046 | } | |
1047 | ||
20766016 | 1048 | static struct nfsd4_operation nfsd4_ops[] = { |
b591480b BF |
1049 | [OP_ACCESS] = { |
1050 | .op_func = (nfsd4op_func)nfsd4_access, | |
b001a1b6 | 1051 | .op_name = "OP_ACCESS", |
b591480b BF |
1052 | }, |
1053 | [OP_CLOSE] = { | |
1054 | .op_func = (nfsd4op_func)nfsd4_close, | |
b001a1b6 | 1055 | .op_name = "OP_CLOSE", |
b591480b BF |
1056 | }, |
1057 | [OP_COMMIT] = { | |
1058 | .op_func = (nfsd4op_func)nfsd4_commit, | |
b001a1b6 | 1059 | .op_name = "OP_COMMIT", |
b591480b BF |
1060 | }, |
1061 | [OP_CREATE] = { | |
1062 | .op_func = (nfsd4op_func)nfsd4_create, | |
b001a1b6 | 1063 | .op_name = "OP_CREATE", |
b591480b BF |
1064 | }, |
1065 | [OP_DELEGRETURN] = { | |
1066 | .op_func = (nfsd4op_func)nfsd4_delegreturn, | |
b001a1b6 | 1067 | .op_name = "OP_DELEGRETURN", |
b591480b BF |
1068 | }, |
1069 | [OP_GETATTR] = { | |
1070 | .op_func = (nfsd4op_func)nfsd4_getattr, | |
eeac294e | 1071 | .op_flags = ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1072 | .op_name = "OP_GETATTR", |
b591480b BF |
1073 | }, |
1074 | [OP_GETFH] = { | |
1075 | .op_func = (nfsd4op_func)nfsd4_getfh, | |
b001a1b6 | 1076 | .op_name = "OP_GETFH", |
b591480b BF |
1077 | }, |
1078 | [OP_LINK] = { | |
1079 | .op_func = (nfsd4op_func)nfsd4_link, | |
b001a1b6 | 1080 | .op_name = "OP_LINK", |
b591480b BF |
1081 | }, |
1082 | [OP_LOCK] = { | |
1083 | .op_func = (nfsd4op_func)nfsd4_lock, | |
b001a1b6 | 1084 | .op_name = "OP_LOCK", |
b591480b BF |
1085 | }, |
1086 | [OP_LOCKT] = { | |
1087 | .op_func = (nfsd4op_func)nfsd4_lockt, | |
b001a1b6 | 1088 | .op_name = "OP_LOCKT", |
b591480b BF |
1089 | }, |
1090 | [OP_LOCKU] = { | |
1091 | .op_func = (nfsd4op_func)nfsd4_locku, | |
b001a1b6 | 1092 | .op_name = "OP_LOCKU", |
b591480b BF |
1093 | }, |
1094 | [OP_LOOKUP] = { | |
1095 | .op_func = (nfsd4op_func)nfsd4_lookup, | |
b001a1b6 | 1096 | .op_name = "OP_LOOKUP", |
b591480b BF |
1097 | }, |
1098 | [OP_LOOKUPP] = { | |
1099 | .op_func = (nfsd4op_func)nfsd4_lookupp, | |
b001a1b6 | 1100 | .op_name = "OP_LOOKUPP", |
b591480b BF |
1101 | }, |
1102 | [OP_NVERIFY] = { | |
1103 | .op_func = (nfsd4op_func)nfsd4_nverify, | |
b001a1b6 | 1104 | .op_name = "OP_NVERIFY", |
b591480b BF |
1105 | }, |
1106 | [OP_OPEN] = { | |
1107 | .op_func = (nfsd4op_func)nfsd4_open, | |
b001a1b6 | 1108 | .op_name = "OP_OPEN", |
b591480b BF |
1109 | }, |
1110 | [OP_OPEN_CONFIRM] = { | |
1111 | .op_func = (nfsd4op_func)nfsd4_open_confirm, | |
b001a1b6 | 1112 | .op_name = "OP_OPEN_CONFIRM", |
b591480b BF |
1113 | }, |
1114 | [OP_OPEN_DOWNGRADE] = { | |
1115 | .op_func = (nfsd4op_func)nfsd4_open_downgrade, | |
b001a1b6 | 1116 | .op_name = "OP_OPEN_DOWNGRADE", |
b591480b BF |
1117 | }, |
1118 | [OP_PUTFH] = { | |
1119 | .op_func = (nfsd4op_func)nfsd4_putfh, | |
27d630ec | 1120 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1121 | .op_name = "OP_PUTFH", |
b591480b | 1122 | }, |
eeac294e | 1123 | [OP_PUTPUBFH] = { |
a1c8c4d1 | 1124 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
27d630ec | 1125 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1126 | .op_name = "OP_PUTPUBFH", |
eeac294e | 1127 | }, |
b591480b BF |
1128 | [OP_PUTROOTFH] = { |
1129 | .op_func = (nfsd4op_func)nfsd4_putrootfh, | |
27d630ec | 1130 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1131 | .op_name = "OP_PUTROOTFH", |
b591480b BF |
1132 | }, |
1133 | [OP_READ] = { | |
1134 | .op_func = (nfsd4op_func)nfsd4_read, | |
b001a1b6 | 1135 | .op_name = "OP_READ", |
b591480b BF |
1136 | }, |
1137 | [OP_READDIR] = { | |
1138 | .op_func = (nfsd4op_func)nfsd4_readdir, | |
b001a1b6 | 1139 | .op_name = "OP_READDIR", |
b591480b BF |
1140 | }, |
1141 | [OP_READLINK] = { | |
1142 | .op_func = (nfsd4op_func)nfsd4_readlink, | |
b001a1b6 | 1143 | .op_name = "OP_READLINK", |
b591480b BF |
1144 | }, |
1145 | [OP_REMOVE] = { | |
1146 | .op_func = (nfsd4op_func)nfsd4_remove, | |
b001a1b6 | 1147 | .op_name = "OP_REMOVE", |
b591480b BF |
1148 | }, |
1149 | [OP_RENAME] = { | |
b001a1b6 | 1150 | .op_name = "OP_RENAME", |
b591480b BF |
1151 | .op_func = (nfsd4op_func)nfsd4_rename, |
1152 | }, | |
1153 | [OP_RENEW] = { | |
1154 | .op_func = (nfsd4op_func)nfsd4_renew, | |
27d630ec | 1155 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1156 | .op_name = "OP_RENEW", |
b591480b BF |
1157 | }, |
1158 | [OP_RESTOREFH] = { | |
1159 | .op_func = (nfsd4op_func)nfsd4_restorefh, | |
27d630ec | 1160 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1161 | .op_name = "OP_RESTOREFH", |
b591480b BF |
1162 | }, |
1163 | [OP_SAVEFH] = { | |
1164 | .op_func = (nfsd4op_func)nfsd4_savefh, | |
b001a1b6 | 1165 | .op_name = "OP_SAVEFH", |
b591480b | 1166 | }, |
dcb488a3 AA |
1167 | [OP_SECINFO] = { |
1168 | .op_func = (nfsd4op_func)nfsd4_secinfo, | |
b001a1b6 | 1169 | .op_name = "OP_SECINFO", |
dcb488a3 | 1170 | }, |
b591480b BF |
1171 | [OP_SETATTR] = { |
1172 | .op_func = (nfsd4op_func)nfsd4_setattr, | |
b001a1b6 | 1173 | .op_name = "OP_SETATTR", |
b591480b BF |
1174 | }, |
1175 | [OP_SETCLIENTID] = { | |
1176 | .op_func = (nfsd4op_func)nfsd4_setclientid, | |
27d630ec | 1177 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1178 | .op_name = "OP_SETCLIENTID", |
b591480b BF |
1179 | }, |
1180 | [OP_SETCLIENTID_CONFIRM] = { | |
1181 | .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, | |
27d630ec | 1182 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1183 | .op_name = "OP_SETCLIENTID_CONFIRM", |
b591480b BF |
1184 | }, |
1185 | [OP_VERIFY] = { | |
1186 | .op_func = (nfsd4op_func)nfsd4_verify, | |
b001a1b6 | 1187 | .op_name = "OP_VERIFY", |
b591480b BF |
1188 | }, |
1189 | [OP_WRITE] = { | |
1190 | .op_func = (nfsd4op_func)nfsd4_write, | |
b001a1b6 | 1191 | .op_name = "OP_WRITE", |
b591480b BF |
1192 | }, |
1193 | [OP_RELEASE_LOCKOWNER] = { | |
1194 | .op_func = (nfsd4op_func)nfsd4_release_lockowner, | |
27d630ec | 1195 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1196 | .op_name = "OP_RELEASE_LOCKOWNER", |
b591480b | 1197 | }, |
069b6ad4 AA |
1198 | |
1199 | /* NFSv4.1 operations */ | |
1200 | [OP_EXCHANGE_ID] = { | |
1201 | .op_func = (nfsd4op_func)nfsd4_exchange_id, | |
f9bb94c4 | 1202 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1203 | .op_name = "OP_EXCHANGE_ID", |
1204 | }, | |
1205 | [OP_CREATE_SESSION] = { | |
1206 | .op_func = (nfsd4op_func)nfsd4_create_session, | |
f9bb94c4 | 1207 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1208 | .op_name = "OP_CREATE_SESSION", |
1209 | }, | |
1210 | [OP_DESTROY_SESSION] = { | |
1211 | .op_func = (nfsd4op_func)nfsd4_destroy_session, | |
f9bb94c4 | 1212 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1213 | .op_name = "OP_DESTROY_SESSION", |
1214 | }, | |
1215 | [OP_SEQUENCE] = { | |
1216 | .op_func = (nfsd4op_func)nfsd4_sequence, | |
f9bb94c4 | 1217 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1218 | .op_name = "OP_SEQUENCE", |
1219 | }, | |
b591480b BF |
1220 | }; |
1221 | ||
f1c7f79b | 1222 | static const char *nfsd4_op_name(unsigned opnum) |
b001a1b6 BH |
1223 | { |
1224 | if (opnum < ARRAY_SIZE(nfsd4_ops)) | |
1225 | return nfsd4_ops[opnum].op_name; | |
1226 | return "unknown_operation"; | |
1227 | } | |
1228 | ||
1da177e4 LT |
1229 | #define nfs4svc_decode_voidargs NULL |
1230 | #define nfs4svc_release_void NULL | |
1231 | #define nfsd4_voidres nfsd4_voidargs | |
1232 | #define nfs4svc_release_compound NULL | |
1233 | struct nfsd4_voidargs { int dummy; }; | |
1234 | ||
1235 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
1236 | { (svc_procfunc) nfsd4_proc_##name, \ | |
1237 | (kxdrproc_t) nfs4svc_decode_##argt##args, \ | |
1238 | (kxdrproc_t) nfs4svc_encode_##rest##res, \ | |
1239 | (kxdrproc_t) nfs4svc_release_##relt, \ | |
1240 | sizeof(struct nfsd4_##argt##args), \ | |
1241 | sizeof(struct nfsd4_##rest##res), \ | |
1242 | 0, \ | |
1243 | cache, \ | |
1244 | respsize, \ | |
1245 | } | |
1246 | ||
1247 | /* | |
1248 | * TODO: At the present time, the NFSv4 server does not do XID caching | |
1249 | * of requests. Implementing XID caching would not be a serious problem, | |
1250 | * although it would require a mild change in interfaces since one | |
1251 | * doesn't know whether an NFSv4 request is idempotent until after the | |
1252 | * XDR decode. However, XID caching totally confuses pynfs (Peter | |
1253 | * Astrand's regression testsuite for NFSv4 servers), which reuses | |
1254 | * XID's liberally, so I've left it unimplemented until pynfs generates | |
1255 | * better XID's. | |
1256 | */ | |
1257 | static struct svc_procedure nfsd_procedures4[2] = { | |
1258 | PROC(null, void, void, void, RC_NOCACHE, 1), | |
7775f4c8 | 1259 | PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4) |
1da177e4 LT |
1260 | }; |
1261 | ||
1262 | struct svc_version nfsd_version4 = { | |
1263 | .vs_vers = 4, | |
1264 | .vs_nproc = 2, | |
1265 | .vs_proc = nfsd_procedures4, | |
1266 | .vs_dispatch = nfsd_dispatch, | |
1267 | .vs_xdrsize = NFS4_SVC_XDRSIZE, | |
1268 | }; | |
1269 | ||
1270 | /* | |
1271 | * Local variables: | |
1272 | * c-basic-offset: 8 | |
1273 | * End: | |
1274 | */ |