1 /*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include <linux/fs_struct.h>
36 #include <linux/file.h>
37 #include <linux/falloc.h>
38 #include <linux/slab.h>
39 #include <linux/kthread.h>
40
41 #include "idmap.h"
42 #include "cache.h"
43 #include "xdr4.h"
44 #include "vfs.h"
45 #include "current_stateid.h"
46 #include "netns.h"
47 #include "acl.h"
48 #include "pnfs.h"
49 #include "trace.h"
50
51 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52 #include <linux/security.h>
53
54 static inline void
nfsd4_security_inode_setsecctx(struct svc_fh * resfh,struct xdr_netobj * label,u32 * bmval)55 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
56 {
57 struct inode *inode = d_inode(resfh->fh_dentry);
58 int status;
59
60 inode_lock(inode);
61 status = security_inode_setsecctx(resfh->fh_dentry,
62 label->data, label->len);
63 inode_unlock(inode);
64
65 if (status)
66 /*
67 * XXX: We should really fail the whole open, but we may
68 * already have created a new file, so it may be too
69 * late. For now this seems the least of evils:
70 */
71 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
72
73 return;
74 }
75 #else
76 static inline void
nfsd4_security_inode_setsecctx(struct svc_fh * resfh,struct xdr_netobj * label,u32 * bmval)77 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
78 { }
79 #endif
80
81 #define NFSDDBG_FACILITY NFSDDBG_PROC
82
83 static u32 nfsd_attrmask[] = {
84 NFSD_WRITEABLE_ATTRS_WORD0,
85 NFSD_WRITEABLE_ATTRS_WORD1,
86 NFSD_WRITEABLE_ATTRS_WORD2
87 };
88
89 static u32 nfsd41_ex_attrmask[] = {
90 NFSD_SUPPATTR_EXCLCREAT_WORD0,
91 NFSD_SUPPATTR_EXCLCREAT_WORD1,
92 NFSD_SUPPATTR_EXCLCREAT_WORD2
93 };
94
95 static __be32
check_attr_support(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,u32 * bmval,u32 * writable)96 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
97 u32 *bmval, u32 *writable)
98 {
99 struct dentry *dentry = cstate->current_fh.fh_dentry;
100 struct svc_export *exp = cstate->current_fh.fh_export;
101
102 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
103 return nfserr_attrnotsupp;
104 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
105 return nfserr_attrnotsupp;
106 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
107 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
108 return nfserr_attrnotsupp;
109 if (writable && !bmval_is_subset(bmval, writable))
110 return nfserr_inval;
111 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
112 (bmval[1] & FATTR4_WORD1_MODE))
113 return nfserr_inval;
114 return nfs_ok;
115 }
116
117 static __be32
nfsd4_check_open_attributes(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_open * open)118 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
119 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
120 {
121 __be32 status = nfs_ok;
122
123 if (open->op_create == NFS4_OPEN_CREATE) {
124 if (open->op_createmode == NFS4_CREATE_UNCHECKED
125 || open->op_createmode == NFS4_CREATE_GUARDED)
126 status = check_attr_support(rqstp, cstate,
127 open->op_bmval, nfsd_attrmask);
128 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
129 status = check_attr_support(rqstp, cstate,
130 open->op_bmval, nfsd41_ex_attrmask);
131 }
132
133 return status;
134 }
135
136 static int
is_create_with_attrs(struct nfsd4_open * open)137 is_create_with_attrs(struct nfsd4_open *open)
138 {
139 return open->op_create == NFS4_OPEN_CREATE
140 && (open->op_createmode == NFS4_CREATE_UNCHECKED
141 || open->op_createmode == NFS4_CREATE_GUARDED
142 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
143 }
144
145 /*
146 * if error occurs when setting the acl, just clear the acl bit
147 * in the returned attr bitmap.
148 */
149 static void
do_set_nfs4_acl(struct svc_rqst * rqstp,struct svc_fh * fhp,struct nfs4_acl * acl,u32 * bmval)150 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
151 struct nfs4_acl *acl, u32 *bmval)
152 {
153 __be32 status;
154
155 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
156 if (status)
157 /*
158 * We should probably fail the whole open at this point,
159 * but we've already created the file, so it's too late;
160 * So this seems the least of evils:
161 */
162 bmval[0] &= ~FATTR4_WORD0_ACL;
163 }
164
165 static inline void
fh_dup2(struct svc_fh * dst,struct svc_fh * src)166 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
167 {
168 fh_put(dst);
169 dget(src->fh_dentry);
170 if (src->fh_export)
171 exp_get(src->fh_export);
172 *dst = *src;
173 }
174
175 static __be32
do_open_permission(struct svc_rqst * rqstp,struct svc_fh * current_fh,struct nfsd4_open * open,int accmode)176 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
177 {
178 __be32 status;
179
180 if (open->op_truncate &&
181 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
182 return nfserr_inval;
183
184 accmode |= NFSD_MAY_READ_IF_EXEC;
185
186 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
187 accmode |= NFSD_MAY_READ;
188 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
189 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
190 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
191 accmode |= NFSD_MAY_WRITE;
192
193 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
194
195 return status;
196 }
197
nfsd_check_obj_isreg(struct svc_fh * fh)198 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
199 {
200 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
201
202 if (S_ISREG(mode))
203 return nfs_ok;
204 if (S_ISDIR(mode))
205 return nfserr_isdir;
206 /*
207 * Using err_symlink as our catch-all case may look odd; but
208 * there's no other obvious error for this case in 4.0, and we
209 * happen to know that it will cause the linux v4 client to do
210 * the right thing on attempts to open something other than a
211 * regular file.
212 */
213 return nfserr_symlink;
214 }
215
nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state * cstate,struct nfsd4_open * open,struct svc_fh * resfh)216 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
217 {
218 if (nfsd4_has_session(cstate))
219 return;
220 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
221 &resfh->fh_handle);
222 }
223
224 static __be32
do_open_lookup(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_open * open,struct svc_fh ** resfh)225 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
226 {
227 struct svc_fh *current_fh = &cstate->current_fh;
228 int accmode;
229 __be32 status;
230
231 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
232 if (!*resfh)
233 return nfserr_jukebox;
234 fh_init(*resfh, NFS4_FHSIZE);
235 open->op_truncate = 0;
236
237 if (open->op_create) {
238 /* FIXME: check session persistence and pnfs flags.
239 * The nfsv4.1 spec requires the following semantics:
240 *
241 * Persistent | pNFS | Server REQUIRED | Client Allowed
242 * Reply Cache | server | |
243 * -------------+--------+-----------------+--------------------
244 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
245 * | | | (SHOULD)
246 * | | and EXCLUSIVE4 | or EXCLUSIVE4
247 * | | | (SHOULD NOT)
248 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
249 * yes | no | GUARDED4 | GUARDED4
250 * yes | yes | GUARDED4 | GUARDED4
251 */
252
253 /*
254 * Note: create modes (UNCHECKED,GUARDED...) are the same
255 * in NFSv4 as in v3 except EXCLUSIVE4_1.
256 */
257 current->fs->umask = open->op_umask;
258 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
259 open->op_fname.len, &open->op_iattr,
260 *resfh, open->op_createmode,
261 (u32 *)open->op_verf.data,
262 &open->op_truncate, &open->op_created);
263 current->fs->umask = 0;
264
265 if (!status && open->op_label.len)
266 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
267
268 /*
269 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
270 * use the returned bitmask to indicate which attributes
271 * we used to store the verifier:
272 */
273 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
274 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
275 FATTR4_WORD1_TIME_MODIFY);
276 } else
277 /*
278 * Note this may exit with the parent still locked.
279 * We will hold the lock until nfsd4_open's final
280 * lookup, to prevent renames or unlinks until we've had
281 * a chance to an acquire a delegation if appropriate.
282 */
283 status = nfsd_lookup(rqstp, current_fh,
284 open->op_fname.data, open->op_fname.len, *resfh);
285 if (status)
286 goto out;
287 status = nfsd_check_obj_isreg(*resfh);
288 if (status)
289 goto out;
290
291 if (is_create_with_attrs(open) && open->op_acl != NULL)
292 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
293
294 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
295 accmode = NFSD_MAY_NOP;
296 if (open->op_created ||
297 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
298 accmode |= NFSD_MAY_OWNER_OVERRIDE;
299 status = do_open_permission(rqstp, *resfh, open, accmode);
300 set_change_info(&open->op_cinfo, current_fh);
301 out:
302 return status;
303 }
304
305 static __be32
do_open_fhandle(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_open * open)306 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
307 {
308 struct svc_fh *current_fh = &cstate->current_fh;
309 __be32 status;
310 int accmode = 0;
311
312 /* We don't know the target directory, and therefore can not
313 * set the change info
314 */
315
316 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
317
318 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
319
320 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
321 (open->op_iattr.ia_size == 0);
322 /*
323 * In the delegation case, the client is telling us about an
324 * open that it *already* performed locally, some time ago. We
325 * should let it succeed now if possible.
326 *
327 * In the case of a CLAIM_FH open, on the other hand, the client
328 * may be counting on us to enforce permissions (the Linux 4.1
329 * client uses this for normal opens, for example).
330 */
331 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
332 accmode = NFSD_MAY_OWNER_OVERRIDE;
333
334 status = do_open_permission(rqstp, current_fh, open, accmode);
335
336 return status;
337 }
338
339 static void
copy_clientid(clientid_t * clid,struct nfsd4_session * session)340 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
341 {
342 struct nfsd4_sessionid *sid =
343 (struct nfsd4_sessionid *)session->se_sessionid.data;
344
345 clid->cl_boot = sid->clientid.cl_boot;
346 clid->cl_id = sid->clientid.cl_id;
347 }
348
349 static __be32
nfsd4_open(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)350 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
351 union nfsd4_op_u *u)
352 {
353 struct nfsd4_open *open = &u->open;
354 __be32 status;
355 struct svc_fh *resfh = NULL;
356 struct net *net = SVC_NET(rqstp);
357 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
358 bool reclaim = false;
359
360 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
361 (int)open->op_fname.len, open->op_fname.data,
362 open->op_openowner);
363
364 /* This check required by spec. */
365 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
366 return nfserr_inval;
367
368 open->op_created = 0;
369 /*
370 * RFC5661 18.51.3
371 * Before RECLAIM_COMPLETE done, server should deny new lock
372 */
373 if (nfsd4_has_session(cstate) &&
374 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
375 &cstate->session->se_client->cl_flags) &&
376 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
377 return nfserr_grace;
378
379 if (nfsd4_has_session(cstate))
380 copy_clientid(&open->op_clientid, cstate->session);
381
382 /* check seqid for replay. set nfs4_owner */
383 status = nfsd4_process_open1(cstate, open, nn);
384 if (status == nfserr_replay_me) {
385 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
386 fh_put(&cstate->current_fh);
387 fh_copy_shallow(&cstate->current_fh.fh_handle,
388 &rp->rp_openfh);
389 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
390 if (status)
391 dprintk("nfsd4_open: replay failed"
392 " restoring previous filehandle\n");
393 else
394 status = nfserr_replay_me;
395 }
396 if (status)
397 goto out;
398 if (open->op_xdr_error) {
399 status = open->op_xdr_error;
400 goto out;
401 }
402
403 status = nfsd4_check_open_attributes(rqstp, cstate, open);
404 if (status)
405 goto out;
406
407 /* Openowner is now set, so sequence id will get bumped. Now we need
408 * these checks before we do any creates: */
409 status = nfserr_grace;
410 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
411 goto out;
412 status = nfserr_no_grace;
413 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
414 goto out;
415
416 switch (open->op_claim_type) {
417 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
418 case NFS4_OPEN_CLAIM_NULL:
419 status = do_open_lookup(rqstp, cstate, open, &resfh);
420 if (status)
421 goto out;
422 break;
423 case NFS4_OPEN_CLAIM_PREVIOUS:
424 status = nfs4_check_open_reclaim(&open->op_clientid,
425 cstate, nn);
426 if (status)
427 goto out;
428 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
429 reclaim = true;
430 /* fall through */
431 case NFS4_OPEN_CLAIM_FH:
432 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
433 status = do_open_fhandle(rqstp, cstate, open);
434 if (status)
435 goto out;
436 resfh = &cstate->current_fh;
437 break;
438 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
439 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
440 dprintk("NFSD: unsupported OPEN claim type %d\n",
441 open->op_claim_type);
442 status = nfserr_notsupp;
443 goto out;
444 default:
445 dprintk("NFSD: Invalid OPEN claim type %d\n",
446 open->op_claim_type);
447 status = nfserr_inval;
448 goto out;
449 }
450 /*
451 * nfsd4_process_open2() does the actual opening of the file. If
452 * successful, it (1) truncates the file if open->op_truncate was
453 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
454 */
455 status = nfsd4_process_open2(rqstp, resfh, open);
456 WARN(status && open->op_created,
457 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
458 be32_to_cpu(status));
459 if (reclaim && !status)
460 nn->somebody_reclaimed = true;
461 out:
462 if (resfh && resfh != &cstate->current_fh) {
463 fh_dup2(&cstate->current_fh, resfh);
464 fh_put(resfh);
465 kfree(resfh);
466 }
467 nfsd4_cleanup_open_state(cstate, open);
468 nfsd4_bump_seqid(cstate, status);
469 return status;
470 }
471
472 /*
473 * OPEN is the only seqid-mutating operation whose decoding can fail
474 * with a seqid-mutating error (specifically, decoding of user names in
475 * the attributes). Therefore we have to do some processing to look up
476 * the stateowner so that we can bump the seqid.
477 */
nfsd4_open_omfg(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_op * op)478 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
479 {
480 struct nfsd4_open *open = &op->u.open;
481
482 if (!seqid_mutating_err(ntohl(op->status)))
483 return op->status;
484 if (nfsd4_has_session(cstate))
485 return op->status;
486 open->op_xdr_error = op->status;
487 return nfsd4_open(rqstp, cstate, &op->u);
488 }
489
490 /*
491 * filehandle-manipulating ops.
492 */
493 static __be32
nfsd4_getfh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)494 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
495 union nfsd4_op_u *u)
496 {
497 u->getfh = &cstate->current_fh;
498 return nfs_ok;
499 }
500
501 static __be32
nfsd4_putfh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)502 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 union nfsd4_op_u *u)
504 {
505 struct nfsd4_putfh *putfh = &u->putfh;
506
507 fh_put(&cstate->current_fh);
508 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
509 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
510 putfh->pf_fhlen);
511 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
512 }
513
514 static __be32
nfsd4_putrootfh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)515 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
516 union nfsd4_op_u *u)
517 {
518 __be32 status;
519
520 fh_put(&cstate->current_fh);
521 status = exp_pseudoroot(rqstp, &cstate->current_fh);
522 return status;
523 }
524
525 static __be32
nfsd4_restorefh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)526 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
527 union nfsd4_op_u *u)
528 {
529 if (!cstate->save_fh.fh_dentry)
530 return nfserr_restorefh;
531
532 fh_dup2(&cstate->current_fh, &cstate->save_fh);
533 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
534 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
535 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
536 }
537 return nfs_ok;
538 }
539
540 static __be32
nfsd4_savefh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)541 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
542 union nfsd4_op_u *u)
543 {
544 fh_dup2(&cstate->save_fh, &cstate->current_fh);
545 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
546 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
547 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
548 }
549 return nfs_ok;
550 }
551
552 /*
553 * misc nfsv4 ops
554 */
555 static __be32
nfsd4_access(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)556 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
557 union nfsd4_op_u *u)
558 {
559 struct nfsd4_access *access = &u->access;
560
561 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
562 return nfserr_inval;
563
564 access->ac_resp_access = access->ac_req_access;
565 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
566 &access->ac_supported);
567 }
568
gen_boot_verifier(nfs4_verifier * verifier,struct net * net)569 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
570 {
571 __be32 *verf = (__be32 *)verifier->data;
572
573 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
574
575 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
576 }
577
578 static __be32
nfsd4_commit(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)579 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
580 union nfsd4_op_u *u)
581 {
582 struct nfsd4_commit *commit = &u->commit;
583
584 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
585 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
586 commit->co_count);
587 }
588
589 static __be32
nfsd4_create(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)590 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
591 union nfsd4_op_u *u)
592 {
593 struct nfsd4_create *create = &u->create;
594 struct svc_fh resfh;
595 __be32 status;
596 dev_t rdev;
597
598 fh_init(&resfh, NFS4_FHSIZE);
599
600 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
601 if (status)
602 return status;
603
604 status = check_attr_support(rqstp, cstate, create->cr_bmval,
605 nfsd_attrmask);
606 if (status)
607 return status;
608
609 current->fs->umask = create->cr_umask;
610 switch (create->cr_type) {
611 case NF4LNK:
612 status = nfsd_symlink(rqstp, &cstate->current_fh,
613 create->cr_name, create->cr_namelen,
614 create->cr_data, &resfh);
615 break;
616
617 case NF4BLK:
618 status = nfserr_inval;
619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
620 if (MAJOR(rdev) != create->cr_specdata1 ||
621 MINOR(rdev) != create->cr_specdata2)
622 goto out_umask;
623 status = nfsd_create(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 &create->cr_iattr, S_IFBLK, rdev, &resfh);
626 break;
627
628 case NF4CHR:
629 status = nfserr_inval;
630 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
631 if (MAJOR(rdev) != create->cr_specdata1 ||
632 MINOR(rdev) != create->cr_specdata2)
633 goto out_umask;
634 status = nfsd_create(rqstp, &cstate->current_fh,
635 create->cr_name, create->cr_namelen,
636 &create->cr_iattr,S_IFCHR, rdev, &resfh);
637 break;
638
639 case NF4SOCK:
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFSOCK, 0, &resfh);
643 break;
644
645 case NF4FIFO:
646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFIFO, 0, &resfh);
649 break;
650
651 case NF4DIR:
652 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
653 status = nfsd_create(rqstp, &cstate->current_fh,
654 create->cr_name, create->cr_namelen,
655 &create->cr_iattr, S_IFDIR, 0, &resfh);
656 break;
657
658 default:
659 status = nfserr_badtype;
660 }
661
662 if (status)
663 goto out;
664
665 if (create->cr_label.len)
666 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
667
668 if (create->cr_acl != NULL)
669 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
670 create->cr_bmval);
671
672 fh_unlock(&cstate->current_fh);
673 set_change_info(&create->cr_cinfo, &cstate->current_fh);
674 fh_dup2(&cstate->current_fh, &resfh);
675 out:
676 fh_put(&resfh);
677 out_umask:
678 current->fs->umask = 0;
679 return status;
680 }
681
682 static __be32
nfsd4_getattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)683 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
684 union nfsd4_op_u *u)
685 {
686 struct nfsd4_getattr *getattr = &u->getattr;
687 __be32 status;
688
689 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
690 if (status)
691 return status;
692
693 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
694 return nfserr_inval;
695
696 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
697 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
698 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
699
700 getattr->ga_fhp = &cstate->current_fh;
701 return nfs_ok;
702 }
703
704 static __be32
nfsd4_link(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)705 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
706 union nfsd4_op_u *u)
707 {
708 struct nfsd4_link *link = &u->link;
709 __be32 status;
710
711 status = nfsd_link(rqstp, &cstate->current_fh,
712 link->li_name, link->li_namelen, &cstate->save_fh);
713 if (!status)
714 set_change_info(&link->li_cinfo, &cstate->current_fh);
715 return status;
716 }
717
nfsd4_do_lookupp(struct svc_rqst * rqstp,struct svc_fh * fh)718 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
719 {
720 struct svc_fh tmp_fh;
721 __be32 ret;
722
723 fh_init(&tmp_fh, NFS4_FHSIZE);
724 ret = exp_pseudoroot(rqstp, &tmp_fh);
725 if (ret)
726 return ret;
727 if (tmp_fh.fh_dentry == fh->fh_dentry) {
728 fh_put(&tmp_fh);
729 return nfserr_noent;
730 }
731 fh_put(&tmp_fh);
732 return nfsd_lookup(rqstp, fh, "..", 2, fh);
733 }
734
735 static __be32
nfsd4_lookupp(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)736 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
737 union nfsd4_op_u *u)
738 {
739 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
740 }
741
742 static __be32
nfsd4_lookup(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)743 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
744 union nfsd4_op_u *u)
745 {
746 return nfsd_lookup(rqstp, &cstate->current_fh,
747 u->lookup.lo_name, u->lookup.lo_len,
748 &cstate->current_fh);
749 }
750
751 static __be32
nfsd4_read(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)752 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
753 union nfsd4_op_u *u)
754 {
755 struct nfsd4_read *read = &u->read;
756 __be32 status;
757
758 read->rd_nf = NULL;
759 if (read->rd_offset >= OFFSET_MAX)
760 return nfserr_inval;
761
762 trace_nfsd_read_start(rqstp, &cstate->current_fh,
763 read->rd_offset, read->rd_length);
764
765 /*
766 * If we do a zero copy read, then a client will see read data
767 * that reflects the state of the file *after* performing the
768 * following compound.
769 *
770 * To ensure proper ordering, we therefore turn off zero copy if
771 * the client wants us to do more in this compound:
772 */
773 if (!nfsd4_last_compound_op(rqstp))
774 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
775
776 /* check stateid */
777 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
778 &read->rd_stateid, RD_STATE,
779 &read->rd_nf);
780 if (status) {
781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
782 goto out;
783 }
784 status = nfs_ok;
785 out:
786 read->rd_rqstp = rqstp;
787 read->rd_fhp = &cstate->current_fh;
788 return status;
789 }
790
791
792 static void
nfsd4_read_release(union nfsd4_op_u * u)793 nfsd4_read_release(union nfsd4_op_u *u)
794 {
795 if (u->read.rd_nf)
796 nfsd_file_put(u->read.rd_nf);
797 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
798 u->read.rd_offset, u->read.rd_length);
799 }
800
801 static __be32
nfsd4_readdir(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)802 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
803 union nfsd4_op_u *u)
804 {
805 struct nfsd4_readdir *readdir = &u->readdir;
806 u64 cookie = readdir->rd_cookie;
807 static const nfs4_verifier zeroverf;
808
809 /* no need to check permission - this will be done in nfsd_readdir() */
810
811 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
812 return nfserr_inval;
813
814 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
815 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
816 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
817
818 if ((cookie == 1) || (cookie == 2) ||
819 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
820 return nfserr_bad_cookie;
821
822 readdir->rd_rqstp = rqstp;
823 readdir->rd_fhp = &cstate->current_fh;
824 return nfs_ok;
825 }
826
827 static __be32
nfsd4_readlink(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)828 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
829 union nfsd4_op_u *u)
830 {
831 u->readlink.rl_rqstp = rqstp;
832 u->readlink.rl_fhp = &cstate->current_fh;
833 return nfs_ok;
834 }
835
836 static __be32
nfsd4_remove(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)837 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
838 union nfsd4_op_u *u)
839 {
840 struct nfsd4_remove *remove = &u->remove;
841 __be32 status;
842
843 if (opens_in_grace(SVC_NET(rqstp)))
844 return nfserr_grace;
845 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
846 remove->rm_name, remove->rm_namelen);
847 if (!status) {
848 fh_unlock(&cstate->current_fh);
849 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
850 }
851 return status;
852 }
853
854 static __be32
nfsd4_rename(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)855 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
856 union nfsd4_op_u *u)
857 {
858 struct nfsd4_rename *rename = &u->rename;
859 __be32 status;
860
861 if (opens_in_grace(SVC_NET(rqstp)))
862 return nfserr_grace;
863 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
864 rename->rn_snamelen, &cstate->current_fh,
865 rename->rn_tname, rename->rn_tnamelen);
866 if (status)
867 return status;
868 set_change_info(&rename->rn_sinfo, &cstate->save_fh);
869 set_change_info(&rename->rn_tinfo, &cstate->current_fh);
870 return nfs_ok;
871 }
872
873 static __be32
nfsd4_secinfo(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)874 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
875 union nfsd4_op_u *u)
876 {
877 struct nfsd4_secinfo *secinfo = &u->secinfo;
878 struct svc_export *exp;
879 struct dentry *dentry;
880 __be32 err;
881
882 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
883 if (err)
884 return err;
885 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
886 secinfo->si_name, secinfo->si_namelen,
887 &exp, &dentry);
888 if (err)
889 return err;
890 fh_unlock(&cstate->current_fh);
891 if (d_really_is_negative(dentry)) {
892 exp_put(exp);
893 err = nfserr_noent;
894 } else
895 secinfo->si_exp = exp;
896 dput(dentry);
897 if (cstate->minorversion)
898 /* See rfc 5661 section 2.6.3.1.1.8 */
899 fh_put(&cstate->current_fh);
900 return err;
901 }
902
903 static __be32
nfsd4_secinfo_no_name(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)904 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
905 union nfsd4_op_u *u)
906 {
907 __be32 err;
908
909 switch (u->secinfo_no_name.sin_style) {
910 case NFS4_SECINFO_STYLE4_CURRENT_FH:
911 break;
912 case NFS4_SECINFO_STYLE4_PARENT:
913 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
914 if (err)
915 return err;
916 break;
917 default:
918 return nfserr_inval;
919 }
920
921 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
922 fh_put(&cstate->current_fh);
923 return nfs_ok;
924 }
925
926 static void
nfsd4_secinfo_release(union nfsd4_op_u * u)927 nfsd4_secinfo_release(union nfsd4_op_u *u)
928 {
929 if (u->secinfo.si_exp)
930 exp_put(u->secinfo.si_exp);
931 }
932
933 static void
nfsd4_secinfo_no_name_release(union nfsd4_op_u * u)934 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
935 {
936 if (u->secinfo_no_name.sin_exp)
937 exp_put(u->secinfo_no_name.sin_exp);
938 }
939
940 static __be32
nfsd4_setattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)941 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
942 union nfsd4_op_u *u)
943 {
944 struct nfsd4_setattr *setattr = &u->setattr;
945 __be32 status = nfs_ok;
946 int err;
947
948 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
949 status = nfs4_preprocess_stateid_op(rqstp, cstate,
950 &cstate->current_fh, &setattr->sa_stateid,
951 WR_STATE, NULL);
952 if (status) {
953 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
954 return status;
955 }
956 }
957 err = fh_want_write(&cstate->current_fh);
958 if (err)
959 return nfserrno(err);
960 status = nfs_ok;
961
962 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
963 nfsd_attrmask);
964 if (status)
965 goto out;
966
967 if (setattr->sa_acl != NULL)
968 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
969 setattr->sa_acl);
970 if (status)
971 goto out;
972 if (setattr->sa_label.len)
973 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
974 &setattr->sa_label);
975 if (status)
976 goto out;
977 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
978 0, (time_t)0);
979 out:
980 fh_drop_write(&cstate->current_fh);
981 return status;
982 }
983
984 static __be32
nfsd4_write(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)985 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
986 union nfsd4_op_u *u)
987 {
988 struct nfsd4_write *write = &u->write;
989 stateid_t *stateid = &write->wr_stateid;
990 struct nfsd_file *nf = NULL;
991 __be32 status = nfs_ok;
992 unsigned long cnt;
993 int nvecs;
994
995 if (write->wr_offset > (u64)OFFSET_MAX ||
996 write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
997 return nfserr_fbig;
998
999 cnt = write->wr_buflen;
1000 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1001 write->wr_offset, cnt);
1002 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1003 stateid, WR_STATE, &nf);
1004 if (status) {
1005 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1006 return status;
1007 }
1008
1009 write->wr_how_written = write->wr_stable_how;
1010 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1011
1012 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1013 &write->wr_head, write->wr_buflen);
1014 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1015
1016 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf->nf_file,
1017 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1018 write->wr_how_written);
1019 nfsd_file_put(nf);
1020
1021 write->wr_bytes_written = cnt;
1022 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1023 write->wr_offset, cnt);
1024 return status;
1025 }
1026
1027 static __be32
nfsd4_verify_copy(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,stateid_t * src_stateid,struct nfsd_file ** src,stateid_t * dst_stateid,struct nfsd_file ** dst)1028 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1029 stateid_t *src_stateid, struct nfsd_file **src,
1030 stateid_t *dst_stateid, struct nfsd_file **dst)
1031 {
1032 __be32 status;
1033
1034 if (!cstate->save_fh.fh_dentry)
1035 return nfserr_nofilehandle;
1036
1037 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1038 src_stateid, RD_STATE, src);
1039 if (status) {
1040 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1041 goto out;
1042 }
1043
1044 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1045 dst_stateid, WR_STATE, dst);
1046 if (status) {
1047 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1048 goto out_put_src;
1049 }
1050
1051 /* fix up for NFS-specific error code */
1052 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1053 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1054 status = nfserr_wrong_type;
1055 goto out_put_dst;
1056 }
1057
1058 out:
1059 return status;
1060 out_put_dst:
1061 nfsd_file_put(*dst);
1062 *dst = NULL;
1063 out_put_src:
1064 nfsd_file_put(*src);
1065 *src = NULL;
1066 goto out;
1067 }
1068
1069 static __be32
nfsd4_clone(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1070 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1071 union nfsd4_op_u *u)
1072 {
1073 struct nfsd4_clone *clone = &u->clone;
1074 struct nfsd_file *src, *dst;
1075 __be32 status;
1076
1077 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1078 &clone->cl_dst_stateid, &dst);
1079 if (status)
1080 goto out;
1081
1082 status = nfsd4_clone_file_range(src->nf_file, clone->cl_src_pos,
1083 dst->nf_file, clone->cl_dst_pos, clone->cl_count,
1084 EX_ISSYNC(cstate->current_fh.fh_export));
1085
1086 nfsd_file_put(dst);
1087 nfsd_file_put(src);
1088 out:
1089 return status;
1090 }
1091
nfs4_put_copy(struct nfsd4_copy * copy)1092 void nfs4_put_copy(struct nfsd4_copy *copy)
1093 {
1094 if (!refcount_dec_and_test(©->refcount))
1095 return;
1096 kfree(copy);
1097 }
1098
1099 static bool
check_and_set_stop_copy(struct nfsd4_copy * copy)1100 check_and_set_stop_copy(struct nfsd4_copy *copy)
1101 {
1102 bool value;
1103
1104 spin_lock(©->cp_clp->async_lock);
1105 value = copy->stopped;
1106 if (!copy->stopped)
1107 copy->stopped = true;
1108 spin_unlock(©->cp_clp->async_lock);
1109 return value;
1110 }
1111
nfsd4_stop_copy(struct nfsd4_copy * copy)1112 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1113 {
1114 /* only 1 thread should stop the copy */
1115 if (!check_and_set_stop_copy(copy))
1116 kthread_stop(copy->copy_task);
1117 nfs4_put_copy(copy);
1118 }
1119
nfsd4_get_copy(struct nfs4_client * clp)1120 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1121 {
1122 struct nfsd4_copy *copy = NULL;
1123
1124 spin_lock(&clp->async_lock);
1125 if (!list_empty(&clp->async_copies)) {
1126 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1127 copies);
1128 refcount_inc(©->refcount);
1129 }
1130 spin_unlock(&clp->async_lock);
1131 return copy;
1132 }
1133
nfsd4_shutdown_copy(struct nfs4_client * clp)1134 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1135 {
1136 struct nfsd4_copy *copy;
1137
1138 while ((copy = nfsd4_get_copy(clp)) != NULL)
1139 nfsd4_stop_copy(copy);
1140 }
1141
nfsd4_cb_offload_release(struct nfsd4_callback * cb)1142 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1143 {
1144 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1145
1146 nfs4_put_copy(copy);
1147 }
1148
nfsd4_cb_offload_done(struct nfsd4_callback * cb,struct rpc_task * task)1149 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1150 struct rpc_task *task)
1151 {
1152 return 1;
1153 }
1154
1155 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1156 .release = nfsd4_cb_offload_release,
1157 .done = nfsd4_cb_offload_done
1158 };
1159
nfsd4_init_copy_res(struct nfsd4_copy * copy,bool sync)1160 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1161 {
1162 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1163 copy->cp_synchronous = sync;
1164 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1165 }
1166
_nfsd_copy_file_range(struct nfsd4_copy * copy)1167 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1168 {
1169 ssize_t bytes_copied = 0;
1170 size_t bytes_total = copy->cp_count;
1171 u64 src_pos = copy->cp_src_pos;
1172 u64 dst_pos = copy->cp_dst_pos;
1173
1174 do {
1175 if (kthread_should_stop())
1176 break;
1177 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1178 src_pos, copy->nf_dst->nf_file, dst_pos,
1179 bytes_total);
1180 if (bytes_copied <= 0)
1181 break;
1182 bytes_total -= bytes_copied;
1183 copy->cp_res.wr_bytes_written += bytes_copied;
1184 src_pos += bytes_copied;
1185 dst_pos += bytes_copied;
1186 } while (bytes_total > 0 && !copy->cp_synchronous);
1187 return bytes_copied;
1188 }
1189
nfsd4_do_copy(struct nfsd4_copy * copy,bool sync)1190 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1191 {
1192 __be32 status;
1193 ssize_t bytes;
1194
1195 bytes = _nfsd_copy_file_range(copy);
1196 /* for async copy, we ignore the error, client can always retry
1197 * to get the error
1198 */
1199 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1200 status = nfserrno(bytes);
1201 else {
1202 nfsd4_init_copy_res(copy, sync);
1203 status = nfs_ok;
1204 }
1205
1206 nfsd_file_put(copy->nf_src);
1207 nfsd_file_put(copy->nf_dst);
1208 return status;
1209 }
1210
dup_copy_fields(struct nfsd4_copy * src,struct nfsd4_copy * dst)1211 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1212 {
1213 dst->cp_src_pos = src->cp_src_pos;
1214 dst->cp_dst_pos = src->cp_dst_pos;
1215 dst->cp_count = src->cp_count;
1216 dst->cp_synchronous = src->cp_synchronous;
1217 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1218 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1219 dst->cp_clp = src->cp_clp;
1220 dst->nf_dst = nfsd_file_get(src->nf_dst);
1221 dst->nf_src = nfsd_file_get(src->nf_src);
1222 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1223 }
1224
cleanup_async_copy(struct nfsd4_copy * copy)1225 static void cleanup_async_copy(struct nfsd4_copy *copy)
1226 {
1227 nfs4_free_cp_state(copy);
1228 nfsd_file_put(copy->nf_dst);
1229 nfsd_file_put(copy->nf_src);
1230 spin_lock(©->cp_clp->async_lock);
1231 list_del(©->copies);
1232 spin_unlock(©->cp_clp->async_lock);
1233 nfs4_put_copy(copy);
1234 }
1235
nfsd4_do_async_copy(void * data)1236 static int nfsd4_do_async_copy(void *data)
1237 {
1238 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1239 struct nfsd4_copy *cb_copy;
1240
1241 copy->nfserr = nfsd4_do_copy(copy, 0);
1242 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1243 if (!cb_copy)
1244 goto out;
1245 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1246 cb_copy->cp_clp = copy->cp_clp;
1247 cb_copy->nfserr = copy->nfserr;
1248 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1249 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1250 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1251 nfsd4_run_cb(&cb_copy->cp_cb);
1252 out:
1253 cleanup_async_copy(copy);
1254 return 0;
1255 }
1256
1257 static __be32
nfsd4_copy(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1258 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1259 union nfsd4_op_u *u)
1260 {
1261 struct nfsd4_copy *copy = &u->copy;
1262 __be32 status;
1263 struct nfsd4_copy *async_copy = NULL;
1264
1265 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1266 ©->nf_src, ©->cp_dst_stateid,
1267 ©->nf_dst);
1268 if (status)
1269 goto out;
1270
1271 copy->cp_clp = cstate->clp;
1272 memcpy(©->fh, &cstate->current_fh.fh_handle,
1273 sizeof(struct knfsd_fh));
1274 if (!copy->cp_synchronous) {
1275 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1276
1277 status = nfserrno(-ENOMEM);
1278 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1279 if (!async_copy)
1280 goto out;
1281 if (!nfs4_init_cp_state(nn, copy)) {
1282 kfree(async_copy);
1283 goto out;
1284 }
1285 refcount_set(&async_copy->refcount, 1);
1286 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1287 sizeof(copy->cp_stateid));
1288 dup_copy_fields(copy, async_copy);
1289 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1290 async_copy, "%s", "copy thread");
1291 if (IS_ERR(async_copy->copy_task))
1292 goto out_err;
1293 spin_lock(&async_copy->cp_clp->async_lock);
1294 list_add(&async_copy->copies,
1295 &async_copy->cp_clp->async_copies);
1296 spin_unlock(&async_copy->cp_clp->async_lock);
1297 wake_up_process(async_copy->copy_task);
1298 status = nfs_ok;
1299 } else
1300 status = nfsd4_do_copy(copy, 1);
1301 out:
1302 return status;
1303 out_err:
1304 if (async_copy)
1305 cleanup_async_copy(async_copy);
1306 goto out;
1307 }
1308
1309 struct nfsd4_copy *
find_async_copy(struct nfs4_client * clp,stateid_t * stateid)1310 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1311 {
1312 struct nfsd4_copy *copy;
1313
1314 spin_lock(&clp->async_lock);
1315 list_for_each_entry(copy, &clp->async_copies, copies) {
1316 if (memcmp(©->cp_stateid, stateid, NFS4_STATEID_SIZE))
1317 continue;
1318 refcount_inc(©->refcount);
1319 spin_unlock(&clp->async_lock);
1320 return copy;
1321 }
1322 spin_unlock(&clp->async_lock);
1323 return NULL;
1324 }
1325
1326 static __be32
nfsd4_offload_cancel(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1327 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1328 struct nfsd4_compound_state *cstate,
1329 union nfsd4_op_u *u)
1330 {
1331 struct nfsd4_offload_status *os = &u->offload_status;
1332 __be32 status = 0;
1333 struct nfsd4_copy *copy;
1334 struct nfs4_client *clp = cstate->clp;
1335
1336 copy = find_async_copy(clp, &os->stateid);
1337 if (copy)
1338 nfsd4_stop_copy(copy);
1339 else
1340 status = nfserr_bad_stateid;
1341
1342 return status;
1343 }
1344
1345 static __be32
nfsd4_fallocate(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_fallocate * fallocate,int flags)1346 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1347 struct nfsd4_fallocate *fallocate, int flags)
1348 {
1349 __be32 status;
1350 struct nfsd_file *nf;
1351
1352 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1353 &fallocate->falloc_stateid,
1354 WR_STATE, &nf);
1355 if (status != nfs_ok) {
1356 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1357 return status;
1358 }
1359
1360 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1361 fallocate->falloc_offset,
1362 fallocate->falloc_length,
1363 flags);
1364 nfsd_file_put(nf);
1365 return status;
1366 }
1367 static __be32
nfsd4_offload_status(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1368 nfsd4_offload_status(struct svc_rqst *rqstp,
1369 struct nfsd4_compound_state *cstate,
1370 union nfsd4_op_u *u)
1371 {
1372 struct nfsd4_offload_status *os = &u->offload_status;
1373 __be32 status = 0;
1374 struct nfsd4_copy *copy;
1375 struct nfs4_client *clp = cstate->clp;
1376
1377 copy = find_async_copy(clp, &os->stateid);
1378 if (copy) {
1379 os->count = copy->cp_res.wr_bytes_written;
1380 nfs4_put_copy(copy);
1381 } else
1382 status = nfserr_bad_stateid;
1383
1384 return status;
1385 }
1386
1387 static __be32
nfsd4_allocate(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1388 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1389 union nfsd4_op_u *u)
1390 {
1391 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1392 }
1393
1394 static __be32
nfsd4_deallocate(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1395 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1396 union nfsd4_op_u *u)
1397 {
1398 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1399 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1400 }
1401
1402 static __be32
nfsd4_seek(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1403 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1404 union nfsd4_op_u *u)
1405 {
1406 struct nfsd4_seek *seek = &u->seek;
1407 int whence;
1408 __be32 status;
1409 struct nfsd_file *nf;
1410
1411 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1412 &seek->seek_stateid,
1413 RD_STATE, &nf);
1414 if (status) {
1415 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1416 return status;
1417 }
1418
1419 switch (seek->seek_whence) {
1420 case NFS4_CONTENT_DATA:
1421 whence = SEEK_DATA;
1422 break;
1423 case NFS4_CONTENT_HOLE:
1424 whence = SEEK_HOLE;
1425 break;
1426 default:
1427 status = nfserr_union_notsupp;
1428 goto out;
1429 }
1430
1431 /*
1432 * Note: This call does change file->f_pos, but nothing in NFSD
1433 * should ever file->f_pos.
1434 */
1435 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1436 if (seek->seek_pos < 0)
1437 status = nfserrno(seek->seek_pos);
1438 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1439 seek->seek_eof = true;
1440
1441 out:
1442 nfsd_file_put(nf);
1443 return status;
1444 }
1445
1446 /* This routine never returns NFS_OK! If there are no other errors, it
1447 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1448 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1449 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1450 */
1451 static __be32
_nfsd4_verify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_verify * verify)1452 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1453 struct nfsd4_verify *verify)
1454 {
1455 __be32 *buf, *p;
1456 int count;
1457 __be32 status;
1458
1459 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1460 if (status)
1461 return status;
1462
1463 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1464 if (status)
1465 return status;
1466
1467 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1468 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1469 return nfserr_inval;
1470 if (verify->ve_attrlen & 3)
1471 return nfserr_inval;
1472
1473 /* count in words:
1474 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1475 */
1476 count = 4 + (verify->ve_attrlen >> 2);
1477 buf = kmalloc(count << 2, GFP_KERNEL);
1478 if (!buf)
1479 return nfserr_jukebox;
1480
1481 p = buf;
1482 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1483 cstate->current_fh.fh_export,
1484 cstate->current_fh.fh_dentry,
1485 verify->ve_bmval,
1486 rqstp, 0);
1487 /*
1488 * If nfsd4_encode_fattr() ran out of space, assume that's because
1489 * the attributes are longer (hence different) than those given:
1490 */
1491 if (status == nfserr_resource)
1492 status = nfserr_not_same;
1493 if (status)
1494 goto out_kfree;
1495
1496 /* skip bitmap */
1497 p = buf + 1 + ntohl(buf[0]);
1498 status = nfserr_not_same;
1499 if (ntohl(*p++) != verify->ve_attrlen)
1500 goto out_kfree;
1501 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1502 status = nfserr_same;
1503
1504 out_kfree:
1505 kfree(buf);
1506 return status;
1507 }
1508
1509 static __be32
nfsd4_nverify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1510 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1511 union nfsd4_op_u *u)
1512 {
1513 __be32 status;
1514
1515 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1516 return status == nfserr_not_same ? nfs_ok : status;
1517 }
1518
1519 static __be32
nfsd4_verify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1520 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1521 union nfsd4_op_u *u)
1522 {
1523 __be32 status;
1524
1525 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1526 return status == nfserr_same ? nfs_ok : status;
1527 }
1528
1529 #ifdef CONFIG_NFSD_PNFS
1530 static const struct nfsd4_layout_ops *
nfsd4_layout_verify(struct svc_export * exp,unsigned int layout_type)1531 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1532 {
1533 if (!exp->ex_layout_types) {
1534 dprintk("%s: export does not support pNFS\n", __func__);
1535 return NULL;
1536 }
1537
1538 if (layout_type >= LAYOUT_TYPE_MAX ||
1539 !(exp->ex_layout_types & (1 << layout_type))) {
1540 dprintk("%s: layout type %d not supported\n",
1541 __func__, layout_type);
1542 return NULL;
1543 }
1544
1545 return nfsd4_layout_ops[layout_type];
1546 }
1547
1548 static __be32
nfsd4_getdeviceinfo(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1549 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1550 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1551 {
1552 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1553 const struct nfsd4_layout_ops *ops;
1554 struct nfsd4_deviceid_map *map;
1555 struct svc_export *exp;
1556 __be32 nfserr;
1557
1558 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1559 __func__,
1560 gdp->gd_layout_type,
1561 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1562 gdp->gd_maxcount);
1563
1564 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1565 if (!map) {
1566 dprintk("%s: couldn't find device ID to export mapping!\n",
1567 __func__);
1568 return nfserr_noent;
1569 }
1570
1571 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1572 if (IS_ERR(exp)) {
1573 dprintk("%s: could not find device id\n", __func__);
1574 return nfserr_noent;
1575 }
1576
1577 nfserr = nfserr_layoutunavailable;
1578 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1579 if (!ops)
1580 goto out;
1581
1582 nfserr = nfs_ok;
1583 if (gdp->gd_maxcount != 0) {
1584 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1585 rqstp, cstate->session->se_client, gdp);
1586 }
1587
1588 gdp->gd_notify_types &= ops->notify_types;
1589 out:
1590 exp_put(exp);
1591 return nfserr;
1592 }
1593
1594 static void
nfsd4_getdeviceinfo_release(union nfsd4_op_u * u)1595 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1596 {
1597 kfree(u->getdeviceinfo.gd_device);
1598 }
1599
1600 static __be32
nfsd4_layoutget(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1601 nfsd4_layoutget(struct svc_rqst *rqstp,
1602 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1603 {
1604 struct nfsd4_layoutget *lgp = &u->layoutget;
1605 struct svc_fh *current_fh = &cstate->current_fh;
1606 const struct nfsd4_layout_ops *ops;
1607 struct nfs4_layout_stateid *ls;
1608 __be32 nfserr;
1609 int accmode = NFSD_MAY_READ_IF_EXEC;
1610
1611 switch (lgp->lg_seg.iomode) {
1612 case IOMODE_READ:
1613 accmode |= NFSD_MAY_READ;
1614 break;
1615 case IOMODE_RW:
1616 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1617 break;
1618 default:
1619 dprintk("%s: invalid iomode %d\n",
1620 __func__, lgp->lg_seg.iomode);
1621 nfserr = nfserr_badiomode;
1622 goto out;
1623 }
1624
1625 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1626 if (nfserr)
1627 goto out;
1628
1629 nfserr = nfserr_layoutunavailable;
1630 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1631 if (!ops)
1632 goto out;
1633
1634 /*
1635 * Verify minlength and range as per RFC5661:
1636 * o If loga_length is less than loga_minlength,
1637 * the metadata server MUST return NFS4ERR_INVAL.
1638 * o If the sum of loga_offset and loga_minlength exceeds
1639 * NFS4_UINT64_MAX, and loga_minlength is not
1640 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1641 * o If the sum of loga_offset and loga_length exceeds
1642 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1643 * the error NFS4ERR_INVAL MUST result.
1644 */
1645 nfserr = nfserr_inval;
1646 if (lgp->lg_seg.length < lgp->lg_minlength ||
1647 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1648 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1649 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1650 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1651 goto out;
1652 if (lgp->lg_seg.length == 0)
1653 goto out;
1654
1655 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1656 true, lgp->lg_layout_type, &ls);
1657 if (nfserr) {
1658 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1659 goto out;
1660 }
1661
1662 nfserr = nfserr_recallconflict;
1663 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1664 goto out_put_stid;
1665
1666 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1667 current_fh, lgp);
1668 if (nfserr)
1669 goto out_put_stid;
1670
1671 nfserr = nfsd4_insert_layout(lgp, ls);
1672
1673 out_put_stid:
1674 mutex_unlock(&ls->ls_mutex);
1675 nfs4_put_stid(&ls->ls_stid);
1676 out:
1677 return nfserr;
1678 }
1679
1680 static void
nfsd4_layoutget_release(union nfsd4_op_u * u)1681 nfsd4_layoutget_release(union nfsd4_op_u *u)
1682 {
1683 kfree(u->layoutget.lg_content);
1684 }
1685
1686 static __be32
nfsd4_layoutcommit(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1687 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1688 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1689 {
1690 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1691 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1692 struct svc_fh *current_fh = &cstate->current_fh;
1693 const struct nfsd4_layout_ops *ops;
1694 loff_t new_size = lcp->lc_last_wr + 1;
1695 struct inode *inode;
1696 struct nfs4_layout_stateid *ls;
1697 __be32 nfserr;
1698
1699 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1700 if (nfserr)
1701 goto out;
1702
1703 nfserr = nfserr_layoutunavailable;
1704 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1705 if (!ops)
1706 goto out;
1707 inode = d_inode(current_fh->fh_dentry);
1708
1709 nfserr = nfserr_inval;
1710 if (new_size <= seg->offset) {
1711 dprintk("pnfsd: last write before layout segment\n");
1712 goto out;
1713 }
1714 if (new_size > seg->offset + seg->length) {
1715 dprintk("pnfsd: last write beyond layout segment\n");
1716 goto out;
1717 }
1718 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1719 dprintk("pnfsd: layoutcommit beyond EOF\n");
1720 goto out;
1721 }
1722
1723 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1724 false, lcp->lc_layout_type,
1725 &ls);
1726 if (nfserr) {
1727 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
1728 /* fixup error code as per RFC5661 */
1729 if (nfserr == nfserr_bad_stateid)
1730 nfserr = nfserr_badlayout;
1731 goto out;
1732 }
1733
1734 /* LAYOUTCOMMIT does not require any serialization */
1735 mutex_unlock(&ls->ls_mutex);
1736
1737 if (new_size > i_size_read(inode)) {
1738 lcp->lc_size_chg = 1;
1739 lcp->lc_newsize = new_size;
1740 } else {
1741 lcp->lc_size_chg = 0;
1742 }
1743
1744 nfserr = ops->proc_layoutcommit(inode, lcp);
1745 nfs4_put_stid(&ls->ls_stid);
1746 out:
1747 return nfserr;
1748 }
1749
1750 static __be32
nfsd4_layoutreturn(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1751 nfsd4_layoutreturn(struct svc_rqst *rqstp,
1752 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1753 {
1754 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1755 struct svc_fh *current_fh = &cstate->current_fh;
1756 __be32 nfserr;
1757
1758 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1759 if (nfserr)
1760 goto out;
1761
1762 nfserr = nfserr_layoutunavailable;
1763 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1764 goto out;
1765
1766 switch (lrp->lr_seg.iomode) {
1767 case IOMODE_READ:
1768 case IOMODE_RW:
1769 case IOMODE_ANY:
1770 break;
1771 default:
1772 dprintk("%s: invalid iomode %d\n", __func__,
1773 lrp->lr_seg.iomode);
1774 nfserr = nfserr_inval;
1775 goto out;
1776 }
1777
1778 switch (lrp->lr_return_type) {
1779 case RETURN_FILE:
1780 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1781 break;
1782 case RETURN_FSID:
1783 case RETURN_ALL:
1784 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1785 break;
1786 default:
1787 dprintk("%s: invalid return_type %d\n", __func__,
1788 lrp->lr_return_type);
1789 nfserr = nfserr_inval;
1790 break;
1791 }
1792 out:
1793 return nfserr;
1794 }
1795 #endif /* CONFIG_NFSD_PNFS */
1796
1797 /*
1798 * NULL call.
1799 */
1800 static __be32
nfsd4_proc_null(struct svc_rqst * rqstp)1801 nfsd4_proc_null(struct svc_rqst *rqstp)
1802 {
1803 return nfs_ok;
1804 }
1805
nfsd4_increment_op_stats(u32 opnum)1806 static inline void nfsd4_increment_op_stats(u32 opnum)
1807 {
1808 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1809 nfsdstats.nfs4_opcount[opnum]++;
1810 }
1811
1812 static const struct nfsd4_operation nfsd4_ops[];
1813
1814 static const char *nfsd4_op_name(unsigned opnum);
1815
1816 /*
1817 * Enforce NFSv4.1 COMPOUND ordering rules:
1818 *
1819 * Also note, enforced elsewhere:
1820 * - SEQUENCE other than as first op results in
1821 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1822 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1823 * (Enforced in nfsd4_bind_conn_to_session().)
1824 * - DESTROY_SESSION must be the final operation in a compound, if
1825 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1826 * (Enforced in nfsd4_destroy_session().)
1827 */
nfs41_check_op_ordering(struct nfsd4_compoundargs * args)1828 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1829 {
1830 struct nfsd4_op *first_op = &args->ops[0];
1831
1832 /* These ordering requirements don't apply to NFSv4.0: */
1833 if (args->minorversion == 0)
1834 return nfs_ok;
1835 /* This is weird, but OK, not our problem: */
1836 if (args->opcnt == 0)
1837 return nfs_ok;
1838 if (first_op->status == nfserr_op_illegal)
1839 return nfs_ok;
1840 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1841 return nfserr_op_not_in_session;
1842 if (first_op->opnum == OP_SEQUENCE)
1843 return nfs_ok;
1844 /*
1845 * So first_op is something allowed outside a session, like
1846 * EXCHANGE_ID; but then it has to be the only op in the
1847 * compound:
1848 */
1849 if (args->opcnt != 1)
1850 return nfserr_not_only_op;
1851 return nfs_ok;
1852 }
1853
OPDESC(struct nfsd4_op * op)1854 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1855 {
1856 return &nfsd4_ops[op->opnum];
1857 }
1858
nfsd4_cache_this_op(struct nfsd4_op * op)1859 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1860 {
1861 if (op->opnum == OP_ILLEGAL)
1862 return false;
1863 return OPDESC(op)->op_flags & OP_CACHEME;
1864 }
1865
need_wrongsec_check(struct svc_rqst * rqstp)1866 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1867 {
1868 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1869 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1870 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1871 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1872 const struct nfsd4_operation *thisd = OPDESC(this);
1873 const struct nfsd4_operation *nextd;
1874
1875 /*
1876 * Most ops check wronsec on our own; only the putfh-like ops
1877 * have special rules.
1878 */
1879 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1880 return false;
1881 /*
1882 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1883 * put-filehandle operation if we're not going to use the
1884 * result:
1885 */
1886 if (argp->opcnt == resp->opcnt)
1887 return false;
1888 if (next->opnum == OP_ILLEGAL)
1889 return false;
1890 nextd = OPDESC(next);
1891 /*
1892 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1893 * errors themselves as necessary; others should check for them
1894 * now:
1895 */
1896 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1897 }
1898
svcxdr_init_encode(struct svc_rqst * rqstp,struct nfsd4_compoundres * resp)1899 static void svcxdr_init_encode(struct svc_rqst *rqstp,
1900 struct nfsd4_compoundres *resp)
1901 {
1902 struct xdr_stream *xdr = &resp->xdr;
1903 struct xdr_buf *buf = &rqstp->rq_res;
1904 struct kvec *head = buf->head;
1905
1906 xdr->buf = buf;
1907 xdr->iov = head;
1908 xdr->p = head->iov_base + head->iov_len;
1909 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1910 /* Tail and page_len should be zero at this point: */
1911 buf->len = buf->head[0].iov_len;
1912 xdr->scratch.iov_len = 0;
1913 xdr->page_ptr = buf->pages - 1;
1914 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1915 - rqstp->rq_auth_slack;
1916 }
1917
1918 /*
1919 * COMPOUND call.
1920 */
1921 static __be32
nfsd4_proc_compound(struct svc_rqst * rqstp)1922 nfsd4_proc_compound(struct svc_rqst *rqstp)
1923 {
1924 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1925 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1926 struct nfsd4_op *op;
1927 struct nfsd4_compound_state *cstate = &resp->cstate;
1928 struct svc_fh *current_fh = &cstate->current_fh;
1929 struct svc_fh *save_fh = &cstate->save_fh;
1930 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1931 __be32 status;
1932
1933 svcxdr_init_encode(rqstp, resp);
1934 resp->tagp = resp->xdr.p;
1935 /* reserve space for: taglen, tag, and opcnt */
1936 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1937 resp->taglen = args->taglen;
1938 resp->tag = args->tag;
1939 resp->rqstp = rqstp;
1940 cstate->minorversion = args->minorversion;
1941 fh_init(current_fh, NFS4_FHSIZE);
1942 fh_init(save_fh, NFS4_FHSIZE);
1943 /*
1944 * Don't use the deferral mechanism for NFSv4; compounds make it
1945 * too hard to avoid non-idempotency problems.
1946 */
1947 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1948
1949 /*
1950 * According to RFC3010, this takes precedence over all other errors.
1951 */
1952 status = nfserr_minor_vers_mismatch;
1953 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1954 goto out;
1955 status = nfserr_resource;
1956 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1957 goto out;
1958
1959 status = nfs41_check_op_ordering(args);
1960 if (status) {
1961 op = &args->ops[0];
1962 op->status = status;
1963 resp->opcnt = 1;
1964 goto encode_op;
1965 }
1966
1967 trace_nfsd_compound(rqstp, args->opcnt);
1968 while (!status && resp->opcnt < args->opcnt) {
1969 op = &args->ops[resp->opcnt++];
1970
1971 /*
1972 * The XDR decode routines may have pre-set op->status;
1973 * for example, if there is a miscellaneous XDR error
1974 * it will be set to nfserr_bad_xdr.
1975 */
1976 if (op->status) {
1977 if (op->opnum == OP_OPEN)
1978 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1979 goto encode_op;
1980 }
1981
1982 if (!current_fh->fh_dentry) {
1983 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1984 op->status = nfserr_nofilehandle;
1985 goto encode_op;
1986 }
1987 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1988 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1989 op->status = nfserr_moved;
1990 goto encode_op;
1991 }
1992
1993 fh_clear_wcc(current_fh);
1994
1995 /* If op is non-idempotent */
1996 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1997 /*
1998 * Don't execute this op if we couldn't encode a
1999 * succesful reply:
2000 */
2001 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2002 /*
2003 * Plus if there's another operation, make sure
2004 * we'll have space to at least encode an error:
2005 */
2006 if (resp->opcnt < args->opcnt)
2007 plen += COMPOUND_ERR_SLACK_SPACE;
2008 op->status = nfsd4_check_resp_size(resp, plen);
2009 }
2010
2011 if (op->status)
2012 goto encode_op;
2013
2014 if (op->opdesc->op_get_currentstateid)
2015 op->opdesc->op_get_currentstateid(cstate, &op->u);
2016 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2017
2018 /* Only from SEQUENCE */
2019 if (cstate->status == nfserr_replay_cache) {
2020 dprintk("%s NFS4.1 replay from cache\n", __func__);
2021 status = op->status;
2022 goto out;
2023 }
2024 if (!op->status) {
2025 if (op->opdesc->op_set_currentstateid)
2026 op->opdesc->op_set_currentstateid(cstate, &op->u);
2027
2028 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2029 clear_current_stateid(cstate);
2030
2031 if (need_wrongsec_check(rqstp))
2032 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2033 }
2034 encode_op:
2035 if (op->status == nfserr_replay_me) {
2036 op->replay = &cstate->replay_owner->so_replay;
2037 nfsd4_encode_replay(&resp->xdr, op);
2038 status = op->status = op->replay->rp_status;
2039 } else {
2040 nfsd4_encode_operation(resp, op);
2041 status = op->status;
2042 }
2043
2044 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2045 nfsd4_op_name(op->opnum));
2046
2047 nfsd4_cstate_clear_replay(cstate);
2048 nfsd4_increment_op_stats(op->opnum);
2049 }
2050
2051 cstate->status = status;
2052 fh_put(current_fh);
2053 fh_put(save_fh);
2054 BUG_ON(cstate->replay_owner);
2055 out:
2056 /* Reset deferral mechanism for RPC deferrals */
2057 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2058 dprintk("nfsv4 compound returned %d\n", ntohl(status));
2059 return status;
2060 }
2061
2062 #define op_encode_hdr_size (2)
2063 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2064 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2065 #define op_encode_change_info_maxsz (5)
2066 #define nfs4_fattr_bitmap_maxsz (4)
2067
2068 /* We'll fall back on returning no lockowner if run out of space: */
2069 #define op_encode_lockowner_maxsz (0)
2070 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2071
2072 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2073
2074 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2075 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2076 op_encode_ace_maxsz)
2077
2078 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2079
nfsd4_only_status_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2080 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2081 {
2082 return (op_encode_hdr_size) * sizeof(__be32);
2083 }
2084
nfsd4_status_stateid_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2085 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2086 {
2087 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2088 }
2089
nfsd4_access_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2090 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2091 {
2092 /* ac_supported, ac_resp_access */
2093 return (op_encode_hdr_size + 2)* sizeof(__be32);
2094 }
2095
nfsd4_commit_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2096 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2097 {
2098 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2099 }
2100
nfsd4_create_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2101 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2102 {
2103 return (op_encode_hdr_size + op_encode_change_info_maxsz
2104 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2105 }
2106
2107 /*
2108 * Note since this is an idempotent operation we won't insist on failing
2109 * the op prematurely if the estimate is too large. We may turn off splice
2110 * reads unnecessarily.
2111 */
nfsd4_getattr_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2112 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2113 struct nfsd4_op *op)
2114 {
2115 u32 *bmap = op->u.getattr.ga_bmval;
2116 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2117 u32 ret = 0;
2118
2119 if (bmap0 & FATTR4_WORD0_ACL)
2120 return svc_max_payload(rqstp);
2121 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2122 return svc_max_payload(rqstp);
2123
2124 if (bmap1 & FATTR4_WORD1_OWNER) {
2125 ret += IDMAP_NAMESZ + 4;
2126 bmap1 &= ~FATTR4_WORD1_OWNER;
2127 }
2128 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2129 ret += IDMAP_NAMESZ + 4;
2130 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2131 }
2132 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2133 ret += NFS4_FHSIZE + 4;
2134 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2135 }
2136 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2137 ret += NFS4_MAXLABELLEN + 12;
2138 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2139 }
2140 /*
2141 * Largest of remaining attributes are 16 bytes (e.g.,
2142 * supported_attributes)
2143 */
2144 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2145 /* bitmask, length */
2146 ret += 20;
2147 return ret;
2148 }
2149
nfsd4_getfh_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2150 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2151 {
2152 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2153 }
2154
nfsd4_link_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2155 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2156 {
2157 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2158 * sizeof(__be32);
2159 }
2160
nfsd4_lock_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2161 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2162 {
2163 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2164 * sizeof(__be32);
2165 }
2166
nfsd4_open_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2167 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2168 {
2169 return (op_encode_hdr_size + op_encode_stateid_maxsz
2170 + op_encode_change_info_maxsz + 1
2171 + nfs4_fattr_bitmap_maxsz
2172 + op_encode_delegation_maxsz) * sizeof(__be32);
2173 }
2174
nfsd4_read_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2175 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2176 {
2177 u32 maxcount = 0, rlen = 0;
2178
2179 maxcount = svc_max_payload(rqstp);
2180 rlen = min(op->u.read.rd_length, maxcount);
2181
2182 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2183 }
2184
nfsd4_readdir_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2185 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2186 {
2187 u32 maxcount = 0, rlen = 0;
2188
2189 maxcount = svc_max_payload(rqstp);
2190 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2191
2192 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2193 XDR_QUADLEN(rlen)) * sizeof(__be32);
2194 }
2195
nfsd4_readlink_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2196 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2197 {
2198 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2199 }
2200
nfsd4_remove_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2201 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2202 {
2203 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2204 * sizeof(__be32);
2205 }
2206
nfsd4_rename_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2207 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2208 {
2209 return (op_encode_hdr_size + op_encode_change_info_maxsz
2210 + op_encode_change_info_maxsz) * sizeof(__be32);
2211 }
2212
nfsd4_sequence_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2213 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2214 struct nfsd4_op *op)
2215 {
2216 return (op_encode_hdr_size
2217 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2218 }
2219
nfsd4_test_stateid_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2220 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2221 {
2222 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2223 * sizeof(__be32);
2224 }
2225
nfsd4_setattr_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2226 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2227 {
2228 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2229 }
2230
nfsd4_secinfo_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2231 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2232 {
2233 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2234 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2235 }
2236
nfsd4_setclientid_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2237 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2238 {
2239 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2240 sizeof(__be32);
2241 }
2242
nfsd4_write_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2243 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2244 {
2245 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2246 }
2247
nfsd4_exchange_id_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2248 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2249 {
2250 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2251 1 + 1 + /* eir_flags, spr_how */\
2252 4 + /* spo_must_enforce & _allow with bitmap */\
2253 2 + /*eir_server_owner.so_minor_id */\
2254 /* eir_server_owner.so_major_id<> */\
2255 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2256 /* eir_server_scope<> */\
2257 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2258 1 + /* eir_server_impl_id array length */\
2259 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2260 }
2261
nfsd4_bind_conn_to_session_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2262 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2263 {
2264 return (op_encode_hdr_size + \
2265 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2266 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2267 }
2268
nfsd4_create_session_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2269 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2270 {
2271 return (op_encode_hdr_size + \
2272 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2273 2 + /* csr_sequence, csr_flags */\
2274 op_encode_channel_attrs_maxsz + \
2275 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2276 }
2277
nfsd4_copy_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2278 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2279 {
2280 return (op_encode_hdr_size +
2281 1 /* wr_callback */ +
2282 op_encode_stateid_maxsz /* wr_callback */ +
2283 2 /* wr_count */ +
2284 1 /* wr_committed */ +
2285 op_encode_verifier_maxsz +
2286 1 /* cr_consecutive */ +
2287 1 /* cr_synchronous */) * sizeof(__be32);
2288 }
2289
nfsd4_offload_status_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2290 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2291 struct nfsd4_op *op)
2292 {
2293 return (op_encode_hdr_size +
2294 2 /* osr_count */ +
2295 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2296 }
2297
2298 #ifdef CONFIG_NFSD_PNFS
nfsd4_getdeviceinfo_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2299 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2300 {
2301 u32 maxcount = 0, rlen = 0;
2302
2303 maxcount = svc_max_payload(rqstp);
2304 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2305
2306 return (op_encode_hdr_size +
2307 1 /* gd_layout_type*/ +
2308 XDR_QUADLEN(rlen) +
2309 2 /* gd_notify_types */) * sizeof(__be32);
2310 }
2311
2312 /*
2313 * At this stage we don't really know what layout driver will handle the request,
2314 * so we need to define an arbitrary upper bound here.
2315 */
2316 #define MAX_LAYOUT_SIZE 128
nfsd4_layoutget_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2317 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2318 {
2319 return (op_encode_hdr_size +
2320 1 /* logr_return_on_close */ +
2321 op_encode_stateid_maxsz +
2322 1 /* nr of layouts */ +
2323 MAX_LAYOUT_SIZE) * sizeof(__be32);
2324 }
2325
nfsd4_layoutcommit_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2326 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2327 {
2328 return (op_encode_hdr_size +
2329 1 /* locr_newsize */ +
2330 2 /* ns_size */) * sizeof(__be32);
2331 }
2332
nfsd4_layoutreturn_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2333 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2334 {
2335 return (op_encode_hdr_size +
2336 1 /* lrs_stateid */ +
2337 op_encode_stateid_maxsz) * sizeof(__be32);
2338 }
2339 #endif /* CONFIG_NFSD_PNFS */
2340
2341
nfsd4_seek_rsize(struct svc_rqst * rqstp,struct nfsd4_op * op)2342 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2343 {
2344 return (op_encode_hdr_size + 3) * sizeof(__be32);
2345 }
2346
2347 static const struct nfsd4_operation nfsd4_ops[] = {
2348 [OP_ACCESS] = {
2349 .op_func = nfsd4_access,
2350 .op_name = "OP_ACCESS",
2351 .op_rsize_bop = nfsd4_access_rsize,
2352 },
2353 [OP_CLOSE] = {
2354 .op_func = nfsd4_close,
2355 .op_flags = OP_MODIFIES_SOMETHING,
2356 .op_name = "OP_CLOSE",
2357 .op_rsize_bop = nfsd4_status_stateid_rsize,
2358 .op_get_currentstateid = nfsd4_get_closestateid,
2359 .op_set_currentstateid = nfsd4_set_closestateid,
2360 },
2361 [OP_COMMIT] = {
2362 .op_func = nfsd4_commit,
2363 .op_flags = OP_MODIFIES_SOMETHING,
2364 .op_name = "OP_COMMIT",
2365 .op_rsize_bop = nfsd4_commit_rsize,
2366 },
2367 [OP_CREATE] = {
2368 .op_func = nfsd4_create,
2369 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2370 .op_name = "OP_CREATE",
2371 .op_rsize_bop = nfsd4_create_rsize,
2372 },
2373 [OP_DELEGRETURN] = {
2374 .op_func = nfsd4_delegreturn,
2375 .op_flags = OP_MODIFIES_SOMETHING,
2376 .op_name = "OP_DELEGRETURN",
2377 .op_rsize_bop = nfsd4_only_status_rsize,
2378 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2379 },
2380 [OP_GETATTR] = {
2381 .op_func = nfsd4_getattr,
2382 .op_flags = ALLOWED_ON_ABSENT_FS,
2383 .op_rsize_bop = nfsd4_getattr_rsize,
2384 .op_name = "OP_GETATTR",
2385 },
2386 [OP_GETFH] = {
2387 .op_func = nfsd4_getfh,
2388 .op_name = "OP_GETFH",
2389 .op_rsize_bop = nfsd4_getfh_rsize,
2390 },
2391 [OP_LINK] = {
2392 .op_func = nfsd4_link,
2393 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2394 | OP_CACHEME,
2395 .op_name = "OP_LINK",
2396 .op_rsize_bop = nfsd4_link_rsize,
2397 },
2398 [OP_LOCK] = {
2399 .op_func = nfsd4_lock,
2400 .op_flags = OP_MODIFIES_SOMETHING |
2401 OP_NONTRIVIAL_ERROR_ENCODE,
2402 .op_name = "OP_LOCK",
2403 .op_rsize_bop = nfsd4_lock_rsize,
2404 .op_set_currentstateid = nfsd4_set_lockstateid,
2405 },
2406 [OP_LOCKT] = {
2407 .op_func = nfsd4_lockt,
2408 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2409 .op_name = "OP_LOCKT",
2410 .op_rsize_bop = nfsd4_lock_rsize,
2411 },
2412 [OP_LOCKU] = {
2413 .op_func = nfsd4_locku,
2414 .op_flags = OP_MODIFIES_SOMETHING,
2415 .op_name = "OP_LOCKU",
2416 .op_rsize_bop = nfsd4_status_stateid_rsize,
2417 .op_get_currentstateid = nfsd4_get_lockustateid,
2418 },
2419 [OP_LOOKUP] = {
2420 .op_func = nfsd4_lookup,
2421 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2422 .op_name = "OP_LOOKUP",
2423 .op_rsize_bop = nfsd4_only_status_rsize,
2424 },
2425 [OP_LOOKUPP] = {
2426 .op_func = nfsd4_lookupp,
2427 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2428 .op_name = "OP_LOOKUPP",
2429 .op_rsize_bop = nfsd4_only_status_rsize,
2430 },
2431 [OP_NVERIFY] = {
2432 .op_func = nfsd4_nverify,
2433 .op_name = "OP_NVERIFY",
2434 .op_rsize_bop = nfsd4_only_status_rsize,
2435 },
2436 [OP_OPEN] = {
2437 .op_func = nfsd4_open,
2438 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2439 .op_name = "OP_OPEN",
2440 .op_rsize_bop = nfsd4_open_rsize,
2441 .op_set_currentstateid = nfsd4_set_openstateid,
2442 },
2443 [OP_OPEN_CONFIRM] = {
2444 .op_func = nfsd4_open_confirm,
2445 .op_flags = OP_MODIFIES_SOMETHING,
2446 .op_name = "OP_OPEN_CONFIRM",
2447 .op_rsize_bop = nfsd4_status_stateid_rsize,
2448 },
2449 [OP_OPEN_DOWNGRADE] = {
2450 .op_func = nfsd4_open_downgrade,
2451 .op_flags = OP_MODIFIES_SOMETHING,
2452 .op_name = "OP_OPEN_DOWNGRADE",
2453 .op_rsize_bop = nfsd4_status_stateid_rsize,
2454 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2455 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2456 },
2457 [OP_PUTFH] = {
2458 .op_func = nfsd4_putfh,
2459 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2460 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2461 .op_name = "OP_PUTFH",
2462 .op_rsize_bop = nfsd4_only_status_rsize,
2463 },
2464 [OP_PUTPUBFH] = {
2465 .op_func = nfsd4_putrootfh,
2466 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2467 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2468 .op_name = "OP_PUTPUBFH",
2469 .op_rsize_bop = nfsd4_only_status_rsize,
2470 },
2471 [OP_PUTROOTFH] = {
2472 .op_func = nfsd4_putrootfh,
2473 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2474 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2475 .op_name = "OP_PUTROOTFH",
2476 .op_rsize_bop = nfsd4_only_status_rsize,
2477 },
2478 [OP_READ] = {
2479 .op_func = nfsd4_read,
2480 .op_release = nfsd4_read_release,
2481 .op_name = "OP_READ",
2482 .op_rsize_bop = nfsd4_read_rsize,
2483 .op_get_currentstateid = nfsd4_get_readstateid,
2484 },
2485 [OP_READDIR] = {
2486 .op_func = nfsd4_readdir,
2487 .op_name = "OP_READDIR",
2488 .op_rsize_bop = nfsd4_readdir_rsize,
2489 },
2490 [OP_READLINK] = {
2491 .op_func = nfsd4_readlink,
2492 .op_name = "OP_READLINK",
2493 .op_rsize_bop = nfsd4_readlink_rsize,
2494 },
2495 [OP_REMOVE] = {
2496 .op_func = nfsd4_remove,
2497 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2498 .op_name = "OP_REMOVE",
2499 .op_rsize_bop = nfsd4_remove_rsize,
2500 },
2501 [OP_RENAME] = {
2502 .op_func = nfsd4_rename,
2503 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2504 .op_name = "OP_RENAME",
2505 .op_rsize_bop = nfsd4_rename_rsize,
2506 },
2507 [OP_RENEW] = {
2508 .op_func = nfsd4_renew,
2509 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2510 | OP_MODIFIES_SOMETHING,
2511 .op_name = "OP_RENEW",
2512 .op_rsize_bop = nfsd4_only_status_rsize,
2513
2514 },
2515 [OP_RESTOREFH] = {
2516 .op_func = nfsd4_restorefh,
2517 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2518 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2519 .op_name = "OP_RESTOREFH",
2520 .op_rsize_bop = nfsd4_only_status_rsize,
2521 },
2522 [OP_SAVEFH] = {
2523 .op_func = nfsd4_savefh,
2524 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2525 .op_name = "OP_SAVEFH",
2526 .op_rsize_bop = nfsd4_only_status_rsize,
2527 },
2528 [OP_SECINFO] = {
2529 .op_func = nfsd4_secinfo,
2530 .op_release = nfsd4_secinfo_release,
2531 .op_flags = OP_HANDLES_WRONGSEC,
2532 .op_name = "OP_SECINFO",
2533 .op_rsize_bop = nfsd4_secinfo_rsize,
2534 },
2535 [OP_SETATTR] = {
2536 .op_func = nfsd4_setattr,
2537 .op_name = "OP_SETATTR",
2538 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2539 | OP_NONTRIVIAL_ERROR_ENCODE,
2540 .op_rsize_bop = nfsd4_setattr_rsize,
2541 .op_get_currentstateid = nfsd4_get_setattrstateid,
2542 },
2543 [OP_SETCLIENTID] = {
2544 .op_func = nfsd4_setclientid,
2545 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2546 | OP_MODIFIES_SOMETHING | OP_CACHEME
2547 | OP_NONTRIVIAL_ERROR_ENCODE,
2548 .op_name = "OP_SETCLIENTID",
2549 .op_rsize_bop = nfsd4_setclientid_rsize,
2550 },
2551 [OP_SETCLIENTID_CONFIRM] = {
2552 .op_func = nfsd4_setclientid_confirm,
2553 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2554 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2555 .op_name = "OP_SETCLIENTID_CONFIRM",
2556 .op_rsize_bop = nfsd4_only_status_rsize,
2557 },
2558 [OP_VERIFY] = {
2559 .op_func = nfsd4_verify,
2560 .op_name = "OP_VERIFY",
2561 .op_rsize_bop = nfsd4_only_status_rsize,
2562 },
2563 [OP_WRITE] = {
2564 .op_func = nfsd4_write,
2565 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2566 .op_name = "OP_WRITE",
2567 .op_rsize_bop = nfsd4_write_rsize,
2568 .op_get_currentstateid = nfsd4_get_writestateid,
2569 },
2570 [OP_RELEASE_LOCKOWNER] = {
2571 .op_func = nfsd4_release_lockowner,
2572 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2573 | OP_MODIFIES_SOMETHING,
2574 .op_name = "OP_RELEASE_LOCKOWNER",
2575 .op_rsize_bop = nfsd4_only_status_rsize,
2576 },
2577
2578 /* NFSv4.1 operations */
2579 [OP_EXCHANGE_ID] = {
2580 .op_func = nfsd4_exchange_id,
2581 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2582 | OP_MODIFIES_SOMETHING,
2583 .op_name = "OP_EXCHANGE_ID",
2584 .op_rsize_bop = nfsd4_exchange_id_rsize,
2585 },
2586 [OP_BACKCHANNEL_CTL] = {
2587 .op_func = nfsd4_backchannel_ctl,
2588 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2589 .op_name = "OP_BACKCHANNEL_CTL",
2590 .op_rsize_bop = nfsd4_only_status_rsize,
2591 },
2592 [OP_BIND_CONN_TO_SESSION] = {
2593 .op_func = nfsd4_bind_conn_to_session,
2594 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2595 | OP_MODIFIES_SOMETHING,
2596 .op_name = "OP_BIND_CONN_TO_SESSION",
2597 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2598 },
2599 [OP_CREATE_SESSION] = {
2600 .op_func = nfsd4_create_session,
2601 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2602 | OP_MODIFIES_SOMETHING,
2603 .op_name = "OP_CREATE_SESSION",
2604 .op_rsize_bop = nfsd4_create_session_rsize,
2605 },
2606 [OP_DESTROY_SESSION] = {
2607 .op_func = nfsd4_destroy_session,
2608 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2609 | OP_MODIFIES_SOMETHING,
2610 .op_name = "OP_DESTROY_SESSION",
2611 .op_rsize_bop = nfsd4_only_status_rsize,
2612 },
2613 [OP_SEQUENCE] = {
2614 .op_func = nfsd4_sequence,
2615 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2616 .op_name = "OP_SEQUENCE",
2617 .op_rsize_bop = nfsd4_sequence_rsize,
2618 },
2619 [OP_DESTROY_CLIENTID] = {
2620 .op_func = nfsd4_destroy_clientid,
2621 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2622 | OP_MODIFIES_SOMETHING,
2623 .op_name = "OP_DESTROY_CLIENTID",
2624 .op_rsize_bop = nfsd4_only_status_rsize,
2625 },
2626 [OP_RECLAIM_COMPLETE] = {
2627 .op_func = nfsd4_reclaim_complete,
2628 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2629 .op_name = "OP_RECLAIM_COMPLETE",
2630 .op_rsize_bop = nfsd4_only_status_rsize,
2631 },
2632 [OP_SECINFO_NO_NAME] = {
2633 .op_func = nfsd4_secinfo_no_name,
2634 .op_release = nfsd4_secinfo_no_name_release,
2635 .op_flags = OP_HANDLES_WRONGSEC,
2636 .op_name = "OP_SECINFO_NO_NAME",
2637 .op_rsize_bop = nfsd4_secinfo_rsize,
2638 },
2639 [OP_TEST_STATEID] = {
2640 .op_func = nfsd4_test_stateid,
2641 .op_flags = ALLOWED_WITHOUT_FH,
2642 .op_name = "OP_TEST_STATEID",
2643 .op_rsize_bop = nfsd4_test_stateid_rsize,
2644 },
2645 [OP_FREE_STATEID] = {
2646 .op_func = nfsd4_free_stateid,
2647 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2648 .op_name = "OP_FREE_STATEID",
2649 .op_get_currentstateid = nfsd4_get_freestateid,
2650 .op_rsize_bop = nfsd4_only_status_rsize,
2651 },
2652 #ifdef CONFIG_NFSD_PNFS
2653 [OP_GETDEVICEINFO] = {
2654 .op_func = nfsd4_getdeviceinfo,
2655 .op_release = nfsd4_getdeviceinfo_release,
2656 .op_flags = ALLOWED_WITHOUT_FH,
2657 .op_name = "OP_GETDEVICEINFO",
2658 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2659 },
2660 [OP_LAYOUTGET] = {
2661 .op_func = nfsd4_layoutget,
2662 .op_release = nfsd4_layoutget_release,
2663 .op_flags = OP_MODIFIES_SOMETHING,
2664 .op_name = "OP_LAYOUTGET",
2665 .op_rsize_bop = nfsd4_layoutget_rsize,
2666 },
2667 [OP_LAYOUTCOMMIT] = {
2668 .op_func = nfsd4_layoutcommit,
2669 .op_flags = OP_MODIFIES_SOMETHING,
2670 .op_name = "OP_LAYOUTCOMMIT",
2671 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2672 },
2673 [OP_LAYOUTRETURN] = {
2674 .op_func = nfsd4_layoutreturn,
2675 .op_flags = OP_MODIFIES_SOMETHING,
2676 .op_name = "OP_LAYOUTRETURN",
2677 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2678 },
2679 #endif /* CONFIG_NFSD_PNFS */
2680
2681 /* NFSv4.2 operations */
2682 [OP_ALLOCATE] = {
2683 .op_func = nfsd4_allocate,
2684 .op_flags = OP_MODIFIES_SOMETHING,
2685 .op_name = "OP_ALLOCATE",
2686 .op_rsize_bop = nfsd4_only_status_rsize,
2687 },
2688 [OP_DEALLOCATE] = {
2689 .op_func = nfsd4_deallocate,
2690 .op_flags = OP_MODIFIES_SOMETHING,
2691 .op_name = "OP_DEALLOCATE",
2692 .op_rsize_bop = nfsd4_only_status_rsize,
2693 },
2694 [OP_CLONE] = {
2695 .op_func = nfsd4_clone,
2696 .op_flags = OP_MODIFIES_SOMETHING,
2697 .op_name = "OP_CLONE",
2698 .op_rsize_bop = nfsd4_only_status_rsize,
2699 },
2700 [OP_COPY] = {
2701 .op_func = nfsd4_copy,
2702 .op_flags = OP_MODIFIES_SOMETHING,
2703 .op_name = "OP_COPY",
2704 .op_rsize_bop = nfsd4_copy_rsize,
2705 },
2706 [OP_SEEK] = {
2707 .op_func = nfsd4_seek,
2708 .op_name = "OP_SEEK",
2709 .op_rsize_bop = nfsd4_seek_rsize,
2710 },
2711 [OP_OFFLOAD_STATUS] = {
2712 .op_func = nfsd4_offload_status,
2713 .op_name = "OP_OFFLOAD_STATUS",
2714 .op_rsize_bop = nfsd4_offload_status_rsize,
2715 },
2716 [OP_OFFLOAD_CANCEL] = {
2717 .op_func = nfsd4_offload_cancel,
2718 .op_flags = OP_MODIFIES_SOMETHING,
2719 .op_name = "OP_OFFLOAD_CANCEL",
2720 .op_rsize_bop = nfsd4_only_status_rsize,
2721 },
2722 };
2723
2724 /**
2725 * nfsd4_spo_must_allow - Determine if the compound op contains an
2726 * operation that is allowed to be sent with machine credentials
2727 *
2728 * @rqstp: a pointer to the struct svc_rqst
2729 *
2730 * Checks to see if the compound contains a spo_must_allow op
2731 * and confirms that it was sent with the proper machine creds.
2732 */
2733
nfsd4_spo_must_allow(struct svc_rqst * rqstp)2734 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2735 {
2736 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2737 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2738 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2739 struct nfsd4_compound_state *cstate = &resp->cstate;
2740 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2741 u32 opiter;
2742
2743 if (!cstate->minorversion)
2744 return false;
2745
2746 if (cstate->spo_must_allowed == true)
2747 return true;
2748
2749 opiter = resp->opcnt;
2750 while (opiter < argp->opcnt) {
2751 this = &argp->ops[opiter++];
2752 if (test_bit(this->opnum, allow->u.longs) &&
2753 cstate->clp->cl_mach_cred &&
2754 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2755 cstate->spo_must_allowed = true;
2756 return true;
2757 }
2758 }
2759 cstate->spo_must_allowed = false;
2760 return false;
2761 }
2762
nfsd4_max_reply(struct svc_rqst * rqstp,struct nfsd4_op * op)2763 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2764 {
2765 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2766 return op_encode_hdr_size * sizeof(__be32);
2767
2768 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2769 return OPDESC(op)->op_rsize_bop(rqstp, op);
2770 }
2771
warn_on_nonidempotent_op(struct nfsd4_op * op)2772 void warn_on_nonidempotent_op(struct nfsd4_op *op)
2773 {
2774 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2775 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2776 op->opnum, nfsd4_op_name(op->opnum));
2777 WARN_ON_ONCE(1);
2778 }
2779 }
2780
nfsd4_op_name(unsigned opnum)2781 static const char *nfsd4_op_name(unsigned opnum)
2782 {
2783 if (opnum < ARRAY_SIZE(nfsd4_ops))
2784 return nfsd4_ops[opnum].op_name;
2785 return "unknown_operation";
2786 }
2787
2788 #define nfsd4_voidres nfsd4_voidargs
2789 struct nfsd4_voidargs { int dummy; };
2790
2791 static const struct svc_procedure nfsd_procedures4[2] = {
2792 [NFSPROC4_NULL] = {
2793 .pc_func = nfsd4_proc_null,
2794 .pc_encode = nfs4svc_encode_voidres,
2795 .pc_argsize = sizeof(struct nfsd4_voidargs),
2796 .pc_ressize = sizeof(struct nfsd4_voidres),
2797 .pc_cachetype = RC_NOCACHE,
2798 .pc_xdrressize = 1,
2799 },
2800 [NFSPROC4_COMPOUND] = {
2801 .pc_func = nfsd4_proc_compound,
2802 .pc_decode = nfs4svc_decode_compoundargs,
2803 .pc_encode = nfs4svc_encode_compoundres,
2804 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2805 .pc_ressize = sizeof(struct nfsd4_compoundres),
2806 .pc_release = nfsd4_release_compoundargs,
2807 .pc_cachetype = RC_NOCACHE,
2808 .pc_xdrressize = NFSD_BUFSIZE/4,
2809 },
2810 };
2811
2812 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2813 const struct svc_version nfsd_version4 = {
2814 .vs_vers = 4,
2815 .vs_nproc = 2,
2816 .vs_proc = nfsd_procedures4,
2817 .vs_count = nfsd_count3,
2818 .vs_dispatch = nfsd_dispatch,
2819 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2820 .vs_rpcb_optnl = true,
2821 .vs_need_cong_ctrl = true,
2822 };
2823
2824 /*
2825 * Local variables:
2826 * c-basic-offset: 8
2827 * End:
2828 */
2829