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) { | |
96 | /* | |
97 | * Note: create modes (UNCHECKED,GUARDED...) are the same | |
98 | * in NFSv4 as in v3. | |
99 | */ | |
100 | status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, | |
101 | open->op_fname.len, &open->op_iattr, | |
102 | &resfh, open->op_createmode, | |
749997e5 JL |
103 | (u32 *)open->op_verf.data, |
104 | &open->op_truncate, &created); | |
105 | ||
99f88726 BF |
106 | /* |
107 | * Following rfc 3530 14.2.16, use the returned bitmask | |
108 | * to indicate which attributes we used to store the | |
109 | * verifier: | |
749997e5 JL |
110 | */ |
111 | if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) | |
99f88726 | 112 | open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | |
749997e5 | 113 | FATTR4_WORD1_TIME_MODIFY); |
af85852d | 114 | } else { |
1da177e4 LT |
115 | status = nfsd_lookup(rqstp, current_fh, |
116 | open->op_fname.data, open->op_fname.len, &resfh); | |
117 | fh_unlock(current_fh); | |
118 | } | |
af85852d BF |
119 | if (status) |
120 | goto out; | |
1da177e4 | 121 | |
af85852d | 122 | set_change_info(&open->op_cinfo, current_fh); |
13024b7b | 123 | fh_dup2(current_fh, &resfh); |
1da177e4 | 124 | |
af85852d | 125 | /* set reply cache */ |
a4773c08 BF |
126 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
127 | &resfh.fh_handle); | |
81ac95c5 | 128 | if (!created) |
8837abca MS |
129 | status = do_open_permission(rqstp, current_fh, open, |
130 | NFSD_MAY_NOP); | |
1da177e4 | 131 | |
af85852d | 132 | out: |
1da177e4 LT |
133 | fh_put(&resfh); |
134 | return status; | |
135 | } | |
136 | ||
b37ad28b | 137 | static __be32 |
1da177e4 LT |
138 | do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
139 | { | |
b37ad28b | 140 | __be32 status; |
1da177e4 LT |
141 | |
142 | /* Only reclaims from previously confirmed clients are valid */ | |
143 | if ((status = nfs4_check_open_reclaim(&open->op_clientid))) | |
144 | return status; | |
145 | ||
146 | /* We don't know the target directory, and therefore can not | |
147 | * set the change info | |
148 | */ | |
149 | ||
150 | memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); | |
151 | ||
152 | /* set replay cache */ | |
a4773c08 BF |
153 | fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, |
154 | ¤t_fh->fh_handle); | |
1da177e4 LT |
155 | |
156 | open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && | |
157 | (open->op_iattr.ia_size == 0); | |
158 | ||
8837abca MS |
159 | status = do_open_permission(rqstp, current_fh, open, |
160 | NFSD_MAY_OWNER_OVERRIDE); | |
1da177e4 LT |
161 | |
162 | return status; | |
163 | } | |
164 | ||
60adfc50 AA |
165 | static void |
166 | copy_clientid(clientid_t *clid, struct nfsd4_session *session) | |
167 | { | |
168 | struct nfsd4_sessionid *sid = | |
169 | (struct nfsd4_sessionid *)session->se_sessionid.data; | |
170 | ||
171 | clid->cl_boot = sid->clientid.cl_boot; | |
172 | clid->cl_id = sid->clientid.cl_id; | |
173 | } | |
1da177e4 | 174 | |
7191155b | 175 | static __be32 |
ca364317 | 176 | nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 177 | struct nfsd4_open *open) |
1da177e4 | 178 | { |
b37ad28b | 179 | __be32 status; |
6668958f AA |
180 | struct nfsd4_compoundres *resp; |
181 | ||
1da177e4 LT |
182 | dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", |
183 | (int)open->op_fname.len, open->op_fname.data, | |
184 | open->op_stateowner); | |
185 | ||
1da177e4 LT |
186 | /* This check required by spec. */ |
187 | if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) | |
188 | return nfserr_inval; | |
189 | ||
60adfc50 AA |
190 | if (nfsd4_has_session(cstate)) |
191 | copy_clientid(&open->op_clientid, cstate->session); | |
192 | ||
1da177e4 LT |
193 | nfs4_lock_state(); |
194 | ||
195 | /* check seqid for replay. set nfs4_owner */ | |
6668958f AA |
196 | resp = rqstp->rq_resp; |
197 | status = nfsd4_process_open1(&resp->cstate, open); | |
a90b061c | 198 | if (status == nfserr_replay_me) { |
1da177e4 | 199 | struct nfs4_replay *rp = &open->op_stateowner->so_replay; |
ca364317 | 200 | fh_put(&cstate->current_fh); |
a4773c08 BF |
201 | fh_copy_shallow(&cstate->current_fh.fh_handle, |
202 | &rp->rp_openfh); | |
8837abca | 203 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
204 | if (status) |
205 | dprintk("nfsd4_open: replay failed" | |
206 | " restoring previous filehandle\n"); | |
207 | else | |
a90b061c | 208 | status = nfserr_replay_me; |
1da177e4 LT |
209 | } |
210 | if (status) | |
211 | goto out; | |
fb553c0f BF |
212 | |
213 | /* Openowner is now set, so sequence id will get bumped. Now we need | |
214 | * these checks before we do any creates: */ | |
cbd0d51a | 215 | status = nfserr_grace; |
af558e33 | 216 | if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a BF |
217 | goto out; |
218 | status = nfserr_no_grace; | |
af558e33 | 219 | if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
cbd0d51a | 220 | goto out; |
fb553c0f | 221 | |
1da177e4 | 222 | switch (open->op_claim_type) { |
0dd3c192 | 223 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
1da177e4 LT |
224 | case NFS4_OPEN_CLAIM_NULL: |
225 | /* | |
226 | * (1) set CURRENT_FH to the file being opened, | |
227 | * creating it if necessary, (2) set open->op_cinfo, | |
228 | * (3) set open->op_truncate if the file is to be | |
229 | * truncated after opening, (4) do permission checking. | |
230 | */ | |
ca364317 BF |
231 | status = do_open_lookup(rqstp, &cstate->current_fh, |
232 | open); | |
1da177e4 LT |
233 | if (status) |
234 | goto out; | |
235 | break; | |
236 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
a525825d | 237 | open->op_stateowner->so_confirmed = 1; |
1da177e4 LT |
238 | /* |
239 | * The CURRENT_FH is already set to the file being | |
240 | * opened. (1) set open->op_cinfo, (2) set | |
241 | * open->op_truncate if the file is to be truncated | |
242 | * after opening, (3) do permission checking. | |
243 | */ | |
ca364317 BF |
244 | status = do_open_fhandle(rqstp, &cstate->current_fh, |
245 | open); | |
1da177e4 LT |
246 | if (status) |
247 | goto out; | |
248 | break; | |
1da177e4 | 249 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
a525825d | 250 | open->op_stateowner->so_confirmed = 1; |
2fdada03 | 251 | dprintk("NFSD: unsupported OPEN claim type %d\n", |
1da177e4 LT |
252 | open->op_claim_type); |
253 | status = nfserr_notsupp; | |
254 | goto out; | |
255 | default: | |
2fdada03 | 256 | dprintk("NFSD: Invalid OPEN claim type %d\n", |
1da177e4 LT |
257 | open->op_claim_type); |
258 | status = nfserr_inval; | |
259 | goto out; | |
260 | } | |
261 | /* | |
262 | * nfsd4_process_open2() does the actual opening of the file. If | |
263 | * successful, it (1) truncates the file if open->op_truncate was | |
264 | * set, (2) sets open->op_stateid, (3) sets open->op_delegation. | |
265 | */ | |
ca364317 | 266 | status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); |
1da177e4 | 267 | out: |
f2327d9a | 268 | if (open->op_stateowner) { |
1da177e4 | 269 | nfs4_get_stateowner(open->op_stateowner); |
a4f1706a | 270 | cstate->replay_owner = open->op_stateowner; |
f2327d9a | 271 | } |
1da177e4 LT |
272 | nfs4_unlock_state(); |
273 | return status; | |
274 | } | |
275 | ||
276 | /* | |
277 | * filehandle-manipulating ops. | |
278 | */ | |
7191155b | 279 | static __be32 |
b591480b BF |
280 | nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
281 | struct svc_fh **getfh) | |
1da177e4 | 282 | { |
ca364317 | 283 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
284 | return nfserr_nofilehandle; |
285 | ||
ca364317 | 286 | *getfh = &cstate->current_fh; |
1da177e4 LT |
287 | return nfs_ok; |
288 | } | |
289 | ||
7191155b | 290 | static __be32 |
ca364317 BF |
291 | nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
292 | struct nfsd4_putfh *putfh) | |
1da177e4 | 293 | { |
ca364317 BF |
294 | fh_put(&cstate->current_fh); |
295 | cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; | |
296 | memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, | |
297 | putfh->pf_fhlen); | |
8837abca | 298 | return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
299 | } |
300 | ||
7191155b | 301 | static __be32 |
b591480b BF |
302 | nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
303 | void *arg) | |
1da177e4 | 304 | { |
b37ad28b | 305 | __be32 status; |
1da177e4 | 306 | |
ca364317 | 307 | fh_put(&cstate->current_fh); |
df547efb | 308 | status = exp_pseudoroot(rqstp, &cstate->current_fh); |
1da177e4 LT |
309 | return status; |
310 | } | |
311 | ||
7191155b | 312 | static __be32 |
b591480b BF |
313 | nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
314 | void *arg) | |
1da177e4 | 315 | { |
ca364317 | 316 | if (!cstate->save_fh.fh_dentry) |
1da177e4 LT |
317 | return nfserr_restorefh; |
318 | ||
ca364317 | 319 | fh_dup2(&cstate->current_fh, &cstate->save_fh); |
1da177e4 LT |
320 | return nfs_ok; |
321 | } | |
322 | ||
7191155b | 323 | static __be32 |
b591480b BF |
324 | nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
325 | void *arg) | |
1da177e4 | 326 | { |
ca364317 | 327 | if (!cstate->current_fh.fh_dentry) |
1da177e4 LT |
328 | return nfserr_nofilehandle; |
329 | ||
ca364317 | 330 | fh_dup2(&cstate->save_fh, &cstate->current_fh); |
1da177e4 LT |
331 | return nfs_ok; |
332 | } | |
333 | ||
334 | /* | |
335 | * misc nfsv4 ops | |
336 | */ | |
7191155b | 337 | static __be32 |
ca364317 BF |
338 | nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
339 | struct nfsd4_access *access) | |
1da177e4 LT |
340 | { |
341 | if (access->ac_req_access & ~NFS3_ACCESS_FULL) | |
342 | return nfserr_inval; | |
343 | ||
344 | access->ac_resp_access = access->ac_req_access; | |
ca364317 BF |
345 | return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
346 | &access->ac_supported); | |
1da177e4 LT |
347 | } |
348 | ||
7191155b | 349 | static __be32 |
ca364317 BF |
350 | nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
351 | struct nfsd4_commit *commit) | |
1da177e4 | 352 | { |
b37ad28b | 353 | __be32 status; |
1da177e4 LT |
354 | |
355 | u32 *p = (u32 *)commit->co_verf.data; | |
356 | *p++ = nfssvc_boot.tv_sec; | |
357 | *p++ = nfssvc_boot.tv_usec; | |
358 | ||
ca364317 BF |
359 | status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
360 | commit->co_count); | |
1da177e4 LT |
361 | if (status == nfserr_symlink) |
362 | status = nfserr_inval; | |
363 | return status; | |
364 | } | |
365 | ||
b37ad28b | 366 | static __be32 |
ca364317 BF |
367 | nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
368 | struct nfsd4_create *create) | |
1da177e4 LT |
369 | { |
370 | struct svc_fh resfh; | |
b37ad28b | 371 | __be32 status; |
1da177e4 LT |
372 | dev_t rdev; |
373 | ||
374 | fh_init(&resfh, NFS4_FHSIZE); | |
375 | ||
8837abca MS |
376 | status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, |
377 | NFSD_MAY_CREATE); | |
1da177e4 LT |
378 | if (status == nfserr_symlink) |
379 | status = nfserr_notdir; | |
380 | if (status) | |
381 | return status; | |
382 | ||
383 | switch (create->cr_type) { | |
384 | case NF4LNK: | |
385 | /* ugh! we have to null-terminate the linktext, or | |
386 | * vfs_symlink() will choke. it is always safe to | |
387 | * null-terminate by brute force, since at worst we | |
388 | * will overwrite the first byte of the create namelen | |
389 | * in the XDR buffer, which has already been extracted | |
390 | * during XDR decode. | |
391 | */ | |
392 | create->cr_linkname[create->cr_linklen] = 0; | |
393 | ||
ca364317 BF |
394 | status = nfsd_symlink(rqstp, &cstate->current_fh, |
395 | create->cr_name, create->cr_namelen, | |
396 | create->cr_linkname, create->cr_linklen, | |
397 | &resfh, &create->cr_iattr); | |
1da177e4 LT |
398 | break; |
399 | ||
400 | case NF4BLK: | |
401 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
402 | if (MAJOR(rdev) != create->cr_specdata1 || | |
403 | MINOR(rdev) != create->cr_specdata2) | |
404 | return nfserr_inval; | |
ca364317 BF |
405 | status = nfsd_create(rqstp, &cstate->current_fh, |
406 | create->cr_name, create->cr_namelen, | |
407 | &create->cr_iattr, S_IFBLK, rdev, &resfh); | |
1da177e4 LT |
408 | break; |
409 | ||
410 | case NF4CHR: | |
411 | rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); | |
412 | if (MAJOR(rdev) != create->cr_specdata1 || | |
413 | MINOR(rdev) != create->cr_specdata2) | |
414 | return nfserr_inval; | |
ca364317 BF |
415 | status = nfsd_create(rqstp, &cstate->current_fh, |
416 | create->cr_name, create->cr_namelen, | |
417 | &create->cr_iattr,S_IFCHR, rdev, &resfh); | |
1da177e4 LT |
418 | break; |
419 | ||
420 | case NF4SOCK: | |
ca364317 BF |
421 | status = nfsd_create(rqstp, &cstate->current_fh, |
422 | create->cr_name, create->cr_namelen, | |
423 | &create->cr_iattr, S_IFSOCK, 0, &resfh); | |
1da177e4 LT |
424 | break; |
425 | ||
426 | case NF4FIFO: | |
ca364317 BF |
427 | status = nfsd_create(rqstp, &cstate->current_fh, |
428 | create->cr_name, create->cr_namelen, | |
429 | &create->cr_iattr, S_IFIFO, 0, &resfh); | |
1da177e4 LT |
430 | break; |
431 | ||
432 | case NF4DIR: | |
433 | create->cr_iattr.ia_valid &= ~ATTR_SIZE; | |
ca364317 BF |
434 | status = nfsd_create(rqstp, &cstate->current_fh, |
435 | create->cr_name, create->cr_namelen, | |
436 | &create->cr_iattr, S_IFDIR, 0, &resfh); | |
1da177e4 LT |
437 | break; |
438 | ||
439 | default: | |
440 | status = nfserr_badtype; | |
441 | } | |
442 | ||
443 | if (!status) { | |
ca364317 BF |
444 | fh_unlock(&cstate->current_fh); |
445 | set_change_info(&create->cr_cinfo, &cstate->current_fh); | |
446 | fh_dup2(&cstate->current_fh, &resfh); | |
1da177e4 LT |
447 | } |
448 | ||
449 | fh_put(&resfh); | |
450 | return status; | |
451 | } | |
452 | ||
7191155b | 453 | static __be32 |
ca364317 BF |
454 | nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
455 | struct nfsd4_getattr *getattr) | |
1da177e4 | 456 | { |
b37ad28b | 457 | __be32 status; |
1da177e4 | 458 | |
8837abca | 459 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
460 | if (status) |
461 | return status; | |
462 | ||
463 | if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
464 | return nfserr_inval; | |
465 | ||
466 | getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; | |
467 | getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; | |
468 | ||
ca364317 | 469 | getattr->ga_fhp = &cstate->current_fh; |
1da177e4 LT |
470 | return nfs_ok; |
471 | } | |
472 | ||
7191155b | 473 | static __be32 |
ca364317 BF |
474 | nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
475 | struct nfsd4_link *link) | |
1da177e4 | 476 | { |
b37ad28b | 477 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 478 | |
ca364317 | 479 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 480 | return status; |
ca364317 BF |
481 | status = nfsd_link(rqstp, &cstate->current_fh, |
482 | link->li_name, link->li_namelen, &cstate->save_fh); | |
1da177e4 | 483 | if (!status) |
ca364317 | 484 | set_change_info(&link->li_cinfo, &cstate->current_fh); |
1da177e4 LT |
485 | return status; |
486 | } | |
487 | ||
b37ad28b | 488 | static __be32 |
b591480b BF |
489 | nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
490 | void *arg) | |
1da177e4 LT |
491 | { |
492 | struct svc_fh tmp_fh; | |
b37ad28b | 493 | __be32 ret; |
1da177e4 LT |
494 | |
495 | fh_init(&tmp_fh, NFS4_FHSIZE); | |
df547efb BF |
496 | ret = exp_pseudoroot(rqstp, &tmp_fh); |
497 | if (ret) | |
1da177e4 | 498 | return ret; |
ca364317 | 499 | if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { |
1da177e4 LT |
500 | fh_put(&tmp_fh); |
501 | return nfserr_noent; | |
502 | } | |
503 | fh_put(&tmp_fh); | |
ca364317 BF |
504 | return nfsd_lookup(rqstp, &cstate->current_fh, |
505 | "..", 2, &cstate->current_fh); | |
1da177e4 LT |
506 | } |
507 | ||
7191155b | 508 | static __be32 |
ca364317 BF |
509 | nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
510 | struct nfsd4_lookup *lookup) | |
1da177e4 | 511 | { |
ca364317 BF |
512 | return nfsd_lookup(rqstp, &cstate->current_fh, |
513 | lookup->lo_name, lookup->lo_len, | |
514 | &cstate->current_fh); | |
1da177e4 LT |
515 | } |
516 | ||
7191155b | 517 | static __be32 |
ca364317 BF |
518 | nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
519 | struct nfsd4_read *read) | |
1da177e4 | 520 | { |
b37ad28b | 521 | __be32 status; |
1da177e4 LT |
522 | |
523 | /* no need to check permission - this will be done in nfsd_read() */ | |
524 | ||
7e06b7f9 | 525 | read->rd_filp = NULL; |
1da177e4 LT |
526 | if (read->rd_offset >= OFFSET_MAX) |
527 | return nfserr_inval; | |
528 | ||
529 | nfs4_lock_state(); | |
530 | /* check stateid */ | |
dd453dfd BH |
531 | if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, |
532 | RD_STATE, &read->rd_filp))) { | |
1da177e4 LT |
533 | dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
534 | goto out; | |
535 | } | |
7e06b7f9 N |
536 | if (read->rd_filp) |
537 | get_file(read->rd_filp); | |
1da177e4 LT |
538 | status = nfs_ok; |
539 | out: | |
540 | nfs4_unlock_state(); | |
541 | read->rd_rqstp = rqstp; | |
ca364317 | 542 | read->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
543 | return status; |
544 | } | |
545 | ||
7191155b | 546 | static __be32 |
ca364317 BF |
547 | nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
548 | struct nfsd4_readdir *readdir) | |
1da177e4 LT |
549 | { |
550 | u64 cookie = readdir->rd_cookie; | |
551 | static const nfs4_verifier zeroverf; | |
552 | ||
553 | /* no need to check permission - this will be done in nfsd_readdir() */ | |
554 | ||
555 | if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) | |
556 | return nfserr_inval; | |
557 | ||
558 | readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0; | |
559 | readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; | |
560 | ||
561 | if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || | |
562 | (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) | |
563 | return nfserr_bad_cookie; | |
564 | ||
565 | readdir->rd_rqstp = rqstp; | |
ca364317 | 566 | readdir->rd_fhp = &cstate->current_fh; |
1da177e4 LT |
567 | return nfs_ok; |
568 | } | |
569 | ||
7191155b | 570 | static __be32 |
ca364317 BF |
571 | nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
572 | struct nfsd4_readlink *readlink) | |
1da177e4 LT |
573 | { |
574 | readlink->rl_rqstp = rqstp; | |
ca364317 | 575 | readlink->rl_fhp = &cstate->current_fh; |
1da177e4 LT |
576 | return nfs_ok; |
577 | } | |
578 | ||
7191155b | 579 | static __be32 |
ca364317 BF |
580 | nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
581 | struct nfsd4_remove *remove) | |
1da177e4 | 582 | { |
b37ad28b | 583 | __be32 status; |
1da177e4 | 584 | |
af558e33 | 585 | if (locks_in_grace()) |
c815afc7 | 586 | return nfserr_grace; |
ca364317 BF |
587 | status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
588 | remove->rm_name, remove->rm_namelen); | |
1da177e4 LT |
589 | if (status == nfserr_symlink) |
590 | return nfserr_notdir; | |
591 | if (!status) { | |
ca364317 BF |
592 | fh_unlock(&cstate->current_fh); |
593 | set_change_info(&remove->rm_cinfo, &cstate->current_fh); | |
1da177e4 LT |
594 | } |
595 | return status; | |
596 | } | |
597 | ||
7191155b | 598 | static __be32 |
ca364317 BF |
599 | nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
600 | struct nfsd4_rename *rename) | |
1da177e4 | 601 | { |
b37ad28b | 602 | __be32 status = nfserr_nofilehandle; |
1da177e4 | 603 | |
ca364317 | 604 | if (!cstate->save_fh.fh_dentry) |
1da177e4 | 605 | return status; |
af558e33 | 606 | if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags |
c815afc7 N |
607 | & NFSEXP_NOSUBTREECHECK)) |
608 | return nfserr_grace; | |
ca364317 BF |
609 | status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
610 | rename->rn_snamelen, &cstate->current_fh, | |
1da177e4 LT |
611 | rename->rn_tname, rename->rn_tnamelen); |
612 | ||
613 | /* the underlying filesystem returns different error's than required | |
614 | * by NFSv4. both save_fh and current_fh have been verified.. */ | |
615 | if (status == nfserr_isdir) | |
616 | status = nfserr_exist; | |
617 | else if ((status == nfserr_notdir) && | |
ca364317 BF |
618 | (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && |
619 | S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) | |
1da177e4 LT |
620 | status = nfserr_exist; |
621 | else if (status == nfserr_symlink) | |
622 | status = nfserr_notdir; | |
623 | ||
624 | if (!status) { | |
ca364317 BF |
625 | set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
626 | set_change_info(&rename->rn_tinfo, &cstate->save_fh); | |
1da177e4 LT |
627 | } |
628 | return status; | |
629 | } | |
630 | ||
dcb488a3 AA |
631 | static __be32 |
632 | nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
633 | struct nfsd4_secinfo *secinfo) | |
634 | { | |
635 | struct svc_fh resfh; | |
636 | struct svc_export *exp; | |
637 | struct dentry *dentry; | |
638 | __be32 err; | |
639 | ||
640 | fh_init(&resfh, NFS4_FHSIZE); | |
641 | err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, | |
642 | secinfo->si_name, secinfo->si_namelen, | |
643 | &exp, &dentry); | |
644 | if (err) | |
645 | return err; | |
646 | if (dentry->d_inode == NULL) { | |
647 | exp_put(exp); | |
648 | err = nfserr_noent; | |
649 | } else | |
650 | secinfo->si_exp = exp; | |
651 | dput(dentry); | |
652 | return err; | |
653 | } | |
654 | ||
7191155b | 655 | static __be32 |
ca364317 BF |
656 | nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
657 | struct nfsd4_setattr *setattr) | |
1da177e4 | 658 | { |
b37ad28b | 659 | __be32 status = nfs_ok; |
1da177e4 | 660 | |
1da177e4 LT |
661 | if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
662 | nfs4_lock_state(); | |
dd453dfd | 663 | status = nfs4_preprocess_stateid_op(cstate, |
6150ef0d | 664 | &setattr->sa_stateid, WR_STATE, NULL); |
1da177e4 | 665 | nfs4_unlock_state(); |
375c5547 | 666 | if (status) { |
3e3b4800 | 667 | dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
375c5547 BF |
668 | return status; |
669 | } | |
1da177e4 | 670 | } |
18f335af DH |
671 | status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); |
672 | if (status) | |
673 | return status; | |
1da177e4 LT |
674 | status = nfs_ok; |
675 | if (setattr->sa_acl != NULL) | |
ca364317 BF |
676 | status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
677 | setattr->sa_acl); | |
1da177e4 | 678 | if (status) |
18f335af | 679 | goto out; |
ca364317 | 680 | status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
1da177e4 | 681 | 0, (time_t)0); |
18f335af DH |
682 | out: |
683 | mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); | |
1da177e4 LT |
684 | return status; |
685 | } | |
686 | ||
7191155b | 687 | static __be32 |
ca364317 BF |
688 | nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
689 | struct nfsd4_write *write) | |
1da177e4 LT |
690 | { |
691 | stateid_t *stateid = &write->wr_stateid; | |
692 | struct file *filp = NULL; | |
693 | u32 *p; | |
b37ad28b | 694 | __be32 status = nfs_ok; |
31dec253 | 695 | unsigned long cnt; |
1da177e4 LT |
696 | |
697 | /* no need to check permission - this will be done in nfsd_write() */ | |
698 | ||
699 | if (write->wr_offset >= OFFSET_MAX) | |
700 | return nfserr_inval; | |
701 | ||
702 | nfs4_lock_state(); | |
dd453dfd | 703 | status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); |
7e06b7f9 N |
704 | if (filp) |
705 | get_file(filp); | |
1da177e4 LT |
706 | nfs4_unlock_state(); |
707 | ||
375c5547 BF |
708 | if (status) { |
709 | dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); | |
710 | return status; | |
711 | } | |
712 | ||
31dec253 | 713 | cnt = write->wr_buflen; |
1da177e4 LT |
714 | write->wr_how_written = write->wr_stable_how; |
715 | p = (u32 *)write->wr_verifier.data; | |
716 | *p++ = nfssvc_boot.tv_sec; | |
717 | *p++ = nfssvc_boot.tv_usec; | |
718 | ||
ca364317 BF |
719 | status = nfsd_write(rqstp, &cstate->current_fh, filp, |
720 | write->wr_offset, rqstp->rq_vec, write->wr_vlen, | |
31dec253 | 721 | &cnt, &write->wr_how_written); |
7e06b7f9 N |
722 | if (filp) |
723 | fput(filp); | |
1da177e4 | 724 | |
31dec253 DS |
725 | write->wr_bytes_written = cnt; |
726 | ||
1da177e4 LT |
727 | if (status == nfserr_symlink) |
728 | status = nfserr_inval; | |
729 | return status; | |
1da177e4 LT |
730 | } |
731 | ||
732 | /* This routine never returns NFS_OK! If there are no other errors, it | |
733 | * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the | |
734 | * attributes matched. VERIFY is implemented by mapping NFSERR_SAME | |
735 | * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. | |
736 | */ | |
b37ad28b | 737 | static __be32 |
c954e2a5 | 738 | _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
ca364317 | 739 | struct nfsd4_verify *verify) |
1da177e4 | 740 | { |
2ebbc012 | 741 | __be32 *buf, *p; |
1da177e4 | 742 | int count; |
b37ad28b | 743 | __be32 status; |
1da177e4 | 744 | |
8837abca | 745 | status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
1da177e4 LT |
746 | if (status) |
747 | return status; | |
748 | ||
749 | if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) | |
750 | || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) | |
751 | return nfserr_attrnotsupp; | |
752 | if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) | |
753 | || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) | |
754 | return nfserr_inval; | |
755 | if (verify->ve_attrlen & 3) | |
756 | return nfserr_inval; | |
757 | ||
758 | /* count in words: | |
759 | * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 | |
760 | */ | |
761 | count = 4 + (verify->ve_attrlen >> 2); | |
762 | buf = kmalloc(count << 2, GFP_KERNEL); | |
763 | if (!buf) | |
764 | return nfserr_resource; | |
765 | ||
ca364317 BF |
766 | status = nfsd4_encode_fattr(&cstate->current_fh, |
767 | cstate->current_fh.fh_export, | |
768 | cstate->current_fh.fh_dentry, buf, | |
1da177e4 | 769 | &count, verify->ve_bmval, |
406a7ea9 | 770 | rqstp, 0); |
1da177e4 LT |
771 | |
772 | /* this means that nfsd4_encode_fattr() ran out of space */ | |
773 | if (status == nfserr_resource && count == 0) | |
774 | status = nfserr_not_same; | |
775 | if (status) | |
776 | goto out_kfree; | |
777 | ||
778 | p = buf + 3; | |
779 | status = nfserr_not_same; | |
780 | if (ntohl(*p++) != verify->ve_attrlen) | |
781 | goto out_kfree; | |
782 | if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) | |
783 | status = nfserr_same; | |
784 | ||
785 | out_kfree: | |
786 | kfree(buf); | |
787 | return status; | |
788 | } | |
789 | ||
c954e2a5 BF |
790 | static __be32 |
791 | nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
792 | struct nfsd4_verify *verify) | |
793 | { | |
794 | __be32 status; | |
795 | ||
796 | status = _nfsd4_verify(rqstp, cstate, verify); | |
797 | return status == nfserr_not_same ? nfs_ok : status; | |
798 | } | |
799 | ||
800 | static __be32 | |
801 | nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
802 | struct nfsd4_verify *verify) | |
803 | { | |
804 | __be32 status; | |
805 | ||
806 | status = _nfsd4_verify(rqstp, cstate, verify); | |
807 | return status == nfserr_same ? nfs_ok : status; | |
808 | } | |
809 | ||
1da177e4 LT |
810 | /* |
811 | * NULL call. | |
812 | */ | |
7111c66e | 813 | static __be32 |
1da177e4 LT |
814 | nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
815 | { | |
816 | return nfs_ok; | |
817 | } | |
818 | ||
e2b20950 SA |
819 | static inline void nfsd4_increment_op_stats(u32 opnum) |
820 | { | |
821 | if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) | |
822 | nfsdstats.nfs4_opcount[opnum]++; | |
823 | } | |
824 | ||
b591480b BF |
825 | typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
826 | void *); | |
f9bb94c4 AA |
827 | enum nfsd4_op_flags { |
828 | ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ | |
829 | ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ | |
830 | ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ | |
831 | }; | |
b591480b BF |
832 | |
833 | struct nfsd4_operation { | |
834 | nfsd4op_func op_func; | |
835 | u32 op_flags; | |
b001a1b6 | 836 | char *op_name; |
b591480b BF |
837 | }; |
838 | ||
839 | static struct nfsd4_operation nfsd4_ops[]; | |
840 | ||
f1c7f79b | 841 | static const char *nfsd4_op_name(unsigned opnum); |
b001a1b6 | 842 | |
bf864a31 AA |
843 | /* |
844 | * This is a replay of a compound for which no cache entry pages | |
845 | * were used. Encode the sequence operation, and if cachethis is FALSE | |
846 | * encode the uncache rep error on the next operation. | |
847 | */ | |
848 | static __be32 | |
849 | nfsd4_enc_uncached_replay(struct nfsd4_compoundargs *args, | |
850 | struct nfsd4_compoundres *resp) | |
851 | { | |
852 | struct nfsd4_op *op; | |
853 | ||
854 | dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__, | |
855 | resp->opcnt, resp->cstate.slot->sl_cache_entry.ce_cachethis); | |
856 | ||
857 | /* Encode the replayed sequence operation */ | |
858 | BUG_ON(resp->opcnt != 1); | |
859 | op = &args->ops[resp->opcnt - 1]; | |
860 | nfsd4_encode_operation(resp, op); | |
861 | ||
862 | /*return nfserr_retry_uncached_rep in next operation. */ | |
863 | if (resp->cstate.slot->sl_cache_entry.ce_cachethis == 0) { | |
864 | op = &args->ops[resp->opcnt++]; | |
865 | op->status = nfserr_retry_uncached_rep; | |
866 | nfsd4_encode_operation(resp, op); | |
867 | } | |
868 | return op->status; | |
869 | } | |
870 | ||
f9bb94c4 AA |
871 | /* |
872 | * Enforce NFSv4.1 COMPOUND ordering rules. | |
873 | * | |
874 | * TODO: | |
875 | * - enforce NFS4ERR_NOT_ONLY_OP, | |
876 | * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. | |
877 | */ | |
878 | static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) | |
879 | { | |
880 | if (args->minorversion && args->opcnt > 0) { | |
881 | struct nfsd4_op *op = &args->ops[0]; | |
882 | return (op->status == nfserr_op_illegal) || | |
883 | (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); | |
884 | } | |
885 | return true; | |
886 | } | |
887 | ||
1da177e4 LT |
888 | /* |
889 | * COMPOUND call. | |
890 | */ | |
7111c66e | 891 | static __be32 |
1da177e4 LT |
892 | nfsd4_proc_compound(struct svc_rqst *rqstp, |
893 | struct nfsd4_compoundargs *args, | |
894 | struct nfsd4_compoundres *resp) | |
895 | { | |
896 | struct nfsd4_op *op; | |
b591480b | 897 | struct nfsd4_operation *opdesc; |
e354d571 | 898 | struct nfsd4_compound_state *cstate = &resp->cstate; |
e5710199 | 899 | int slack_bytes; |
b37ad28b | 900 | __be32 status; |
1da177e4 | 901 | |
1da177e4 | 902 | resp->xbuf = &rqstp->rq_res; |
e354d571 AA |
903 | resp->p = rqstp->rq_res.head[0].iov_base + |
904 | rqstp->rq_res.head[0].iov_len; | |
1da177e4 LT |
905 | resp->tagp = resp->p; |
906 | /* reserve space for: taglen, tag, and opcnt */ | |
907 | resp->p += 2 + XDR_QUADLEN(args->taglen); | |
908 | resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; | |
909 | resp->taglen = args->taglen; | |
910 | resp->tag = args->tag; | |
911 | resp->opcnt = 0; | |
912 | resp->rqstp = rqstp; | |
e354d571 AA |
913 | resp->cstate.replay_owner = NULL; |
914 | fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); | |
915 | fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); | |
2f425878 AA |
916 | /* Use the deferral mechanism only for NFSv4.0 compounds */ |
917 | rqstp->rq_usedeferral = (args->minorversion == 0); | |
1da177e4 LT |
918 | |
919 | /* | |
920 | * According to RFC3010, this takes precedence over all other errors. | |
921 | */ | |
922 | status = nfserr_minor_vers_mismatch; | |
923 | if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION) | |
924 | goto out; | |
925 | ||
f9bb94c4 AA |
926 | if (!nfs41_op_ordering_ok(args)) { |
927 | op = &args->ops[0]; | |
928 | op->status = nfserr_sequence_pos; | |
929 | goto encode_op; | |
930 | } | |
931 | ||
1da177e4 LT |
932 | status = nfs_ok; |
933 | while (!status && resp->opcnt < args->opcnt) { | |
934 | op = &args->ops[resp->opcnt++]; | |
935 | ||
b001a1b6 BH |
936 | dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", |
937 | resp->opcnt, args->opcnt, op->opnum, | |
938 | nfsd4_op_name(op->opnum)); | |
1da177e4 LT |
939 | /* |
940 | * The XDR decode routines may have pre-set op->status; | |
941 | * for example, if there is a miscellaneous XDR error | |
942 | * it will be set to nfserr_bad_xdr. | |
943 | */ | |
944 | if (op->status) | |
945 | goto encode_op; | |
946 | ||
947 | /* We must be able to encode a successful response to | |
948 | * this operation, with enough room left over to encode a | |
949 | * failed response to the next operation. If we don't | |
950 | * have enough room, fail with ERR_RESOURCE. | |
951 | */ | |
e5710199 BF |
952 | slack_bytes = (char *)resp->end - (char *)resp->p; |
953 | if (slack_bytes < COMPOUND_SLACK_SPACE | |
954 | + COMPOUND_ERR_SLACK_SPACE) { | |
955 | BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); | |
1da177e4 LT |
956 | op->status = nfserr_resource; |
957 | goto encode_op; | |
958 | } | |
959 | ||
b591480b BF |
960 | opdesc = &nfsd4_ops[op->opnum]; |
961 | ||
ca364317 | 962 | if (!cstate->current_fh.fh_dentry) { |
27d630ec | 963 | if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
42ca0993 BF |
964 | op->status = nfserr_nofilehandle; |
965 | goto encode_op; | |
966 | } | |
eeac294e BF |
967 | } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && |
968 | !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { | |
42ca0993 | 969 | op->status = nfserr_moved; |
1da177e4 LT |
970 | goto encode_op; |
971 | } | |
b591480b BF |
972 | |
973 | if (opdesc->op_func) | |
974 | op->status = opdesc->op_func(rqstp, cstate, &op->u); | |
975 | else | |
1da177e4 | 976 | BUG_ON(op->status == nfs_ok); |
1da177e4 LT |
977 | |
978 | encode_op: | |
da3846a2 AA |
979 | /* Only from SEQUENCE or CREATE_SESSION */ |
980 | if (resp->cstate.status == nfserr_replay_cache) { | |
981 | dprintk("%s NFS4.1 replay from cache\n", __func__); | |
bf864a31 AA |
982 | if (nfsd4_not_cached(resp)) |
983 | status = nfsd4_enc_uncached_replay(args, resp); | |
984 | else | |
985 | status = op->status; | |
da3846a2 AA |
986 | goto out; |
987 | } | |
a90b061c | 988 | if (op->status == nfserr_replay_me) { |
a4f1706a | 989 | op->replay = &cstate->replay_owner->so_replay; |
1da177e4 LT |
990 | nfsd4_encode_replay(resp, op); |
991 | status = op->status = op->replay->rp_status; | |
992 | } else { | |
993 | nfsd4_encode_operation(resp, op); | |
994 | status = op->status; | |
995 | } | |
0407717d BH |
996 | |
997 | dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", | |
998 | args->ops, args->opcnt, resp->opcnt, op->opnum, | |
999 | be32_to_cpu(status)); | |
1000 | ||
a4f1706a BF |
1001 | if (cstate->replay_owner) { |
1002 | nfs4_put_stateowner(cstate->replay_owner); | |
1003 | cstate->replay_owner = NULL; | |
1da177e4 | 1004 | } |
7e06b7f9 N |
1005 | /* XXX Ugh, we need to get rid of this kind of special case: */ |
1006 | if (op->opnum == OP_READ && op->u.read.rd_filp) | |
1007 | fput(op->u.read.rd_filp); | |
e2b20950 SA |
1008 | |
1009 | nfsd4_increment_op_stats(op->opnum); | |
1da177e4 | 1010 | } |
2f425878 AA |
1011 | if (!rqstp->rq_usedeferral && status == nfserr_dropit) { |
1012 | dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); | |
1013 | status = nfserr_jukebox; | |
1014 | } | |
1da177e4 | 1015 | |
da3846a2 | 1016 | resp->cstate.status = status; |
e354d571 AA |
1017 | fh_put(&resp->cstate.current_fh); |
1018 | fh_put(&resp->cstate.save_fh); | |
1019 | BUG_ON(resp->cstate.replay_owner); | |
1da177e4 LT |
1020 | out: |
1021 | nfsd4_release_compoundargs(args); | |
2f425878 AA |
1022 | /* Reset deferral mechanism for RPC deferrals */ |
1023 | rqstp->rq_usedeferral = 1; | |
3b12cd98 | 1024 | dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
1da177e4 LT |
1025 | return status; |
1026 | } | |
1027 | ||
20766016 | 1028 | static struct nfsd4_operation nfsd4_ops[] = { |
b591480b BF |
1029 | [OP_ACCESS] = { |
1030 | .op_func = (nfsd4op_func)nfsd4_access, | |
b001a1b6 | 1031 | .op_name = "OP_ACCESS", |
b591480b BF |
1032 | }, |
1033 | [OP_CLOSE] = { | |
1034 | .op_func = (nfsd4op_func)nfsd4_close, | |
b001a1b6 | 1035 | .op_name = "OP_CLOSE", |
b591480b BF |
1036 | }, |
1037 | [OP_COMMIT] = { | |
1038 | .op_func = (nfsd4op_func)nfsd4_commit, | |
b001a1b6 | 1039 | .op_name = "OP_COMMIT", |
b591480b BF |
1040 | }, |
1041 | [OP_CREATE] = { | |
1042 | .op_func = (nfsd4op_func)nfsd4_create, | |
b001a1b6 | 1043 | .op_name = "OP_CREATE", |
b591480b BF |
1044 | }, |
1045 | [OP_DELEGRETURN] = { | |
1046 | .op_func = (nfsd4op_func)nfsd4_delegreturn, | |
b001a1b6 | 1047 | .op_name = "OP_DELEGRETURN", |
b591480b BF |
1048 | }, |
1049 | [OP_GETATTR] = { | |
1050 | .op_func = (nfsd4op_func)nfsd4_getattr, | |
eeac294e | 1051 | .op_flags = ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1052 | .op_name = "OP_GETATTR", |
b591480b BF |
1053 | }, |
1054 | [OP_GETFH] = { | |
1055 | .op_func = (nfsd4op_func)nfsd4_getfh, | |
b001a1b6 | 1056 | .op_name = "OP_GETFH", |
b591480b BF |
1057 | }, |
1058 | [OP_LINK] = { | |
1059 | .op_func = (nfsd4op_func)nfsd4_link, | |
b001a1b6 | 1060 | .op_name = "OP_LINK", |
b591480b BF |
1061 | }, |
1062 | [OP_LOCK] = { | |
1063 | .op_func = (nfsd4op_func)nfsd4_lock, | |
b001a1b6 | 1064 | .op_name = "OP_LOCK", |
b591480b BF |
1065 | }, |
1066 | [OP_LOCKT] = { | |
1067 | .op_func = (nfsd4op_func)nfsd4_lockt, | |
b001a1b6 | 1068 | .op_name = "OP_LOCKT", |
b591480b BF |
1069 | }, |
1070 | [OP_LOCKU] = { | |
1071 | .op_func = (nfsd4op_func)nfsd4_locku, | |
b001a1b6 | 1072 | .op_name = "OP_LOCKU", |
b591480b BF |
1073 | }, |
1074 | [OP_LOOKUP] = { | |
1075 | .op_func = (nfsd4op_func)nfsd4_lookup, | |
b001a1b6 | 1076 | .op_name = "OP_LOOKUP", |
b591480b BF |
1077 | }, |
1078 | [OP_LOOKUPP] = { | |
1079 | .op_func = (nfsd4op_func)nfsd4_lookupp, | |
b001a1b6 | 1080 | .op_name = "OP_LOOKUPP", |
b591480b BF |
1081 | }, |
1082 | [OP_NVERIFY] = { | |
1083 | .op_func = (nfsd4op_func)nfsd4_nverify, | |
b001a1b6 | 1084 | .op_name = "OP_NVERIFY", |
b591480b BF |
1085 | }, |
1086 | [OP_OPEN] = { | |
1087 | .op_func = (nfsd4op_func)nfsd4_open, | |
b001a1b6 | 1088 | .op_name = "OP_OPEN", |
b591480b BF |
1089 | }, |
1090 | [OP_OPEN_CONFIRM] = { | |
1091 | .op_func = (nfsd4op_func)nfsd4_open_confirm, | |
b001a1b6 | 1092 | .op_name = "OP_OPEN_CONFIRM", |
b591480b BF |
1093 | }, |
1094 | [OP_OPEN_DOWNGRADE] = { | |
1095 | .op_func = (nfsd4op_func)nfsd4_open_downgrade, | |
b001a1b6 | 1096 | .op_name = "OP_OPEN_DOWNGRADE", |
b591480b BF |
1097 | }, |
1098 | [OP_PUTFH] = { | |
1099 | .op_func = (nfsd4op_func)nfsd4_putfh, | |
27d630ec | 1100 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1101 | .op_name = "OP_PUTFH", |
b591480b | 1102 | }, |
eeac294e | 1103 | [OP_PUTPUBFH] = { |
a1c8c4d1 | 1104 | .op_func = (nfsd4op_func)nfsd4_putrootfh, |
27d630ec | 1105 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1106 | .op_name = "OP_PUTPUBFH", |
eeac294e | 1107 | }, |
b591480b BF |
1108 | [OP_PUTROOTFH] = { |
1109 | .op_func = (nfsd4op_func)nfsd4_putrootfh, | |
27d630ec | 1110 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1111 | .op_name = "OP_PUTROOTFH", |
b591480b BF |
1112 | }, |
1113 | [OP_READ] = { | |
1114 | .op_func = (nfsd4op_func)nfsd4_read, | |
b001a1b6 | 1115 | .op_name = "OP_READ", |
b591480b BF |
1116 | }, |
1117 | [OP_READDIR] = { | |
1118 | .op_func = (nfsd4op_func)nfsd4_readdir, | |
b001a1b6 | 1119 | .op_name = "OP_READDIR", |
b591480b BF |
1120 | }, |
1121 | [OP_READLINK] = { | |
1122 | .op_func = (nfsd4op_func)nfsd4_readlink, | |
b001a1b6 | 1123 | .op_name = "OP_READLINK", |
b591480b BF |
1124 | }, |
1125 | [OP_REMOVE] = { | |
1126 | .op_func = (nfsd4op_func)nfsd4_remove, | |
b001a1b6 | 1127 | .op_name = "OP_REMOVE", |
b591480b BF |
1128 | }, |
1129 | [OP_RENAME] = { | |
b001a1b6 | 1130 | .op_name = "OP_RENAME", |
b591480b BF |
1131 | .op_func = (nfsd4op_func)nfsd4_rename, |
1132 | }, | |
1133 | [OP_RENEW] = { | |
1134 | .op_func = (nfsd4op_func)nfsd4_renew, | |
27d630ec | 1135 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1136 | .op_name = "OP_RENEW", |
b591480b BF |
1137 | }, |
1138 | [OP_RESTOREFH] = { | |
1139 | .op_func = (nfsd4op_func)nfsd4_restorefh, | |
27d630ec | 1140 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1141 | .op_name = "OP_RESTOREFH", |
b591480b BF |
1142 | }, |
1143 | [OP_SAVEFH] = { | |
1144 | .op_func = (nfsd4op_func)nfsd4_savefh, | |
b001a1b6 | 1145 | .op_name = "OP_SAVEFH", |
b591480b | 1146 | }, |
dcb488a3 AA |
1147 | [OP_SECINFO] = { |
1148 | .op_func = (nfsd4op_func)nfsd4_secinfo, | |
b001a1b6 | 1149 | .op_name = "OP_SECINFO", |
dcb488a3 | 1150 | }, |
b591480b BF |
1151 | [OP_SETATTR] = { |
1152 | .op_func = (nfsd4op_func)nfsd4_setattr, | |
b001a1b6 | 1153 | .op_name = "OP_SETATTR", |
b591480b BF |
1154 | }, |
1155 | [OP_SETCLIENTID] = { | |
1156 | .op_func = (nfsd4op_func)nfsd4_setclientid, | |
27d630ec | 1157 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1158 | .op_name = "OP_SETCLIENTID", |
b591480b BF |
1159 | }, |
1160 | [OP_SETCLIENTID_CONFIRM] = { | |
1161 | .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, | |
27d630ec | 1162 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1163 | .op_name = "OP_SETCLIENTID_CONFIRM", |
b591480b BF |
1164 | }, |
1165 | [OP_VERIFY] = { | |
1166 | .op_func = (nfsd4op_func)nfsd4_verify, | |
b001a1b6 | 1167 | .op_name = "OP_VERIFY", |
b591480b BF |
1168 | }, |
1169 | [OP_WRITE] = { | |
1170 | .op_func = (nfsd4op_func)nfsd4_write, | |
b001a1b6 | 1171 | .op_name = "OP_WRITE", |
b591480b BF |
1172 | }, |
1173 | [OP_RELEASE_LOCKOWNER] = { | |
1174 | .op_func = (nfsd4op_func)nfsd4_release_lockowner, | |
27d630ec | 1175 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
b001a1b6 | 1176 | .op_name = "OP_RELEASE_LOCKOWNER", |
b591480b | 1177 | }, |
069b6ad4 AA |
1178 | |
1179 | /* NFSv4.1 operations */ | |
1180 | [OP_EXCHANGE_ID] = { | |
1181 | .op_func = (nfsd4op_func)nfsd4_exchange_id, | |
f9bb94c4 | 1182 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1183 | .op_name = "OP_EXCHANGE_ID", |
1184 | }, | |
1185 | [OP_CREATE_SESSION] = { | |
1186 | .op_func = (nfsd4op_func)nfsd4_create_session, | |
f9bb94c4 | 1187 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1188 | .op_name = "OP_CREATE_SESSION", |
1189 | }, | |
1190 | [OP_DESTROY_SESSION] = { | |
1191 | .op_func = (nfsd4op_func)nfsd4_destroy_session, | |
f9bb94c4 | 1192 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1193 | .op_name = "OP_DESTROY_SESSION", |
1194 | }, | |
1195 | [OP_SEQUENCE] = { | |
1196 | .op_func = (nfsd4op_func)nfsd4_sequence, | |
f9bb94c4 | 1197 | .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, |
069b6ad4 AA |
1198 | .op_name = "OP_SEQUENCE", |
1199 | }, | |
b591480b BF |
1200 | }; |
1201 | ||
f1c7f79b | 1202 | static const char *nfsd4_op_name(unsigned opnum) |
b001a1b6 BH |
1203 | { |
1204 | if (opnum < ARRAY_SIZE(nfsd4_ops)) | |
1205 | return nfsd4_ops[opnum].op_name; | |
1206 | return "unknown_operation"; | |
1207 | } | |
1208 | ||
1da177e4 LT |
1209 | #define nfs4svc_decode_voidargs NULL |
1210 | #define nfs4svc_release_void NULL | |
1211 | #define nfsd4_voidres nfsd4_voidargs | |
1212 | #define nfs4svc_release_compound NULL | |
1213 | struct nfsd4_voidargs { int dummy; }; | |
1214 | ||
1215 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
1216 | { (svc_procfunc) nfsd4_proc_##name, \ | |
1217 | (kxdrproc_t) nfs4svc_decode_##argt##args, \ | |
1218 | (kxdrproc_t) nfs4svc_encode_##rest##res, \ | |
1219 | (kxdrproc_t) nfs4svc_release_##relt, \ | |
1220 | sizeof(struct nfsd4_##argt##args), \ | |
1221 | sizeof(struct nfsd4_##rest##res), \ | |
1222 | 0, \ | |
1223 | cache, \ | |
1224 | respsize, \ | |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * TODO: At the present time, the NFSv4 server does not do XID caching | |
1229 | * of requests. Implementing XID caching would not be a serious problem, | |
1230 | * although it would require a mild change in interfaces since one | |
1231 | * doesn't know whether an NFSv4 request is idempotent until after the | |
1232 | * XDR decode. However, XID caching totally confuses pynfs (Peter | |
1233 | * Astrand's regression testsuite for NFSv4 servers), which reuses | |
1234 | * XID's liberally, so I've left it unimplemented until pynfs generates | |
1235 | * better XID's. | |
1236 | */ | |
1237 | static struct svc_procedure nfsd_procedures4[2] = { | |
1238 | PROC(null, void, void, void, RC_NOCACHE, 1), | |
7775f4c8 | 1239 | PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4) |
1da177e4 LT |
1240 | }; |
1241 | ||
1242 | struct svc_version nfsd_version4 = { | |
1243 | .vs_vers = 4, | |
1244 | .vs_nproc = 2, | |
1245 | .vs_proc = nfsd_procedures4, | |
1246 | .vs_dispatch = nfsd_dispatch, | |
1247 | .vs_xdrsize = NFS4_SVC_XDRSIZE, | |
1248 | }; | |
1249 | ||
1250 | /* | |
1251 | * Local variables: | |
1252 | * c-basic-offset: 8 | |
1253 | * End: | |
1254 | */ |