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 #include <linux/namei.h>
41
42 #include <linux/sunrpc/addr.h>
43 #include <linux/nfs_ssc.h>
44
45 #include "idmap.h"
46 #include "cache.h"
47 #include "xdr4.h"
48 #include "vfs.h"
49 #include "current_stateid.h"
50 #include "netns.h"
51 #include "acl.h"
52 #include "pnfs.h"
53 #include "trace.h"
54
55 static bool inter_copy_offload_enable;
56 module_param(inter_copy_offload_enable, bool, 0644);
57 MODULE_PARM_DESC(inter_copy_offload_enable,
58 "Enable inter server to server copy offload. Default: false");
59
60 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
61 static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
62 module_param(nfsd4_ssc_umount_timeout, int, 0644);
63 MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
64 "idle msecs before unmount export from source server");
65 #endif
66
67 #define NFSDDBG_FACILITY NFSDDBG_PROC
68
69 static u32 nfsd_attrmask[] = {
70 NFSD_WRITEABLE_ATTRS_WORD0,
71 NFSD_WRITEABLE_ATTRS_WORD1,
72 NFSD_WRITEABLE_ATTRS_WORD2
73 };
74
75 static u32 nfsd41_ex_attrmask[] = {
76 NFSD_SUPPATTR_EXCLCREAT_WORD0,
77 NFSD_SUPPATTR_EXCLCREAT_WORD1,
78 NFSD_SUPPATTR_EXCLCREAT_WORD2
79 };
80
81 static __be32
check_attr_support(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,u32 * bmval,u32 * writable)82 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
83 u32 *bmval, u32 *writable)
84 {
85 struct dentry *dentry = cstate->current_fh.fh_dentry;
86 struct svc_export *exp = cstate->current_fh.fh_export;
87
88 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
89 return nfserr_attrnotsupp;
90 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
91 return nfserr_attrnotsupp;
92 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
93 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
94 return nfserr_attrnotsupp;
95 if (writable && !bmval_is_subset(bmval, writable))
96 return nfserr_inval;
97 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
98 (bmval[1] & FATTR4_WORD1_MODE))
99 return nfserr_inval;
100 return nfs_ok;
101 }
102
103 static __be32
nfsd4_check_open_attributes(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_open * open)104 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
105 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
106 {
107 __be32 status = nfs_ok;
108
109 if (open->op_create == NFS4_OPEN_CREATE) {
110 if (open->op_createmode == NFS4_CREATE_UNCHECKED
111 || open->op_createmode == NFS4_CREATE_GUARDED)
112 status = check_attr_support(rqstp, cstate,
113 open->op_bmval, nfsd_attrmask);
114 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
115 status = check_attr_support(rqstp, cstate,
116 open->op_bmval, nfsd41_ex_attrmask);
117 }
118
119 return status;
120 }
121
122 static int
is_create_with_attrs(struct nfsd4_open * open)123 is_create_with_attrs(struct nfsd4_open *open)
124 {
125 return open->op_create == NFS4_OPEN_CREATE
126 && (open->op_createmode == NFS4_CREATE_UNCHECKED
127 || open->op_createmode == NFS4_CREATE_GUARDED
128 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
129 }
130
131 static inline void
fh_dup2(struct svc_fh * dst,struct svc_fh * src)132 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
133 {
134 fh_put(dst);
135 dget(src->fh_dentry);
136 if (src->fh_export)
137 exp_get(src->fh_export);
138 *dst = *src;
139 }
140
141 static __be32
do_open_permission(struct svc_rqst * rqstp,struct svc_fh * current_fh,struct nfsd4_open * open,int accmode)142 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
143 {
144
145 if (open->op_truncate &&
146 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
147 return nfserr_inval;
148
149 accmode |= NFSD_MAY_READ_IF_EXEC;
150
151 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
152 accmode |= NFSD_MAY_READ;
153 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
154 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
155 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
156 accmode |= NFSD_MAY_WRITE;
157
158 return fh_verify(rqstp, current_fh, S_IFREG, accmode);
159 }
160
nfsd_check_obj_isreg(struct svc_fh * fh)161 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
162 {
163 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
164
165 if (S_ISREG(mode))
166 return nfs_ok;
167 if (S_ISDIR(mode))
168 return nfserr_isdir;
169 /*
170 * Using err_symlink as our catch-all case may look odd; but
171 * there's no other obvious error for this case in 4.0, and we
172 * happen to know that it will cause the linux v4 client to do
173 * the right thing on attempts to open something other than a
174 * regular file.
175 */
176 return nfserr_symlink;
177 }
178
nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state * cstate,struct nfsd4_open * open,struct svc_fh * resfh)179 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
180 {
181 if (nfsd4_has_session(cstate))
182 return;
183 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
184 &resfh->fh_handle);
185 }
186
nfsd4_create_is_exclusive(int createmode)187 static inline bool nfsd4_create_is_exclusive(int createmode)
188 {
189 return createmode == NFS4_CREATE_EXCLUSIVE ||
190 createmode == NFS4_CREATE_EXCLUSIVE4_1;
191 }
192
193 static __be32
nfsd4_vfs_create(struct svc_fh * fhp,struct dentry * child,struct nfsd4_open * open)194 nfsd4_vfs_create(struct svc_fh *fhp, struct dentry *child,
195 struct nfsd4_open *open)
196 {
197 struct file *filp;
198 struct path path;
199 int oflags;
200
201 oflags = O_CREAT | O_LARGEFILE;
202 switch (open->op_share_access & NFS4_SHARE_ACCESS_BOTH) {
203 case NFS4_SHARE_ACCESS_WRITE:
204 oflags |= O_WRONLY;
205 break;
206 case NFS4_SHARE_ACCESS_BOTH:
207 oflags |= O_RDWR;
208 break;
209 default:
210 oflags |= O_RDONLY;
211 }
212
213 path.mnt = fhp->fh_export->ex_path.mnt;
214 path.dentry = child;
215 filp = dentry_create(&path, oflags, open->op_iattr.ia_mode,
216 current_cred());
217 if (IS_ERR(filp))
218 return nfserrno(PTR_ERR(filp));
219
220 open->op_filp = filp;
221 return nfs_ok;
222 }
223
224 /*
225 * Implement NFSv4's unchecked, guarded, and exclusive create
226 * semantics for regular files. Open state for this new file is
227 * subsequently fabricated in nfsd4_process_open2().
228 *
229 * Upon return, caller must release @fhp and @resfhp.
230 */
231 static __be32
nfsd4_create_file(struct svc_rqst * rqstp,struct svc_fh * fhp,struct svc_fh * resfhp,struct nfsd4_open * open)232 nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
233 struct svc_fh *resfhp, struct nfsd4_open *open)
234 {
235 struct iattr *iap = &open->op_iattr;
236 struct nfsd_attrs attrs = {
237 .na_iattr = iap,
238 .na_seclabel = &open->op_label,
239 };
240 struct dentry *parent, *child;
241 __u32 v_mtime, v_atime;
242 struct inode *inode;
243 __be32 status;
244 int host_err;
245
246 if (isdotent(open->op_fname, open->op_fnamelen))
247 return nfserr_exist;
248 if (!(iap->ia_valid & ATTR_MODE))
249 iap->ia_mode = 0;
250
251 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
252 if (status != nfs_ok)
253 return status;
254 parent = fhp->fh_dentry;
255 inode = d_inode(parent);
256
257 host_err = fh_want_write(fhp);
258 if (host_err)
259 return nfserrno(host_err);
260
261 if (is_create_with_attrs(open))
262 nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
263
264 inode_lock_nested(inode, I_MUTEX_PARENT);
265
266 child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
267 if (IS_ERR(child)) {
268 status = nfserrno(PTR_ERR(child));
269 goto out;
270 }
271
272 if (d_really_is_negative(child)) {
273 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
274 if (status != nfs_ok)
275 goto out;
276 }
277
278 status = fh_compose(resfhp, fhp->fh_export, child, fhp);
279 if (status != nfs_ok)
280 goto out;
281
282 v_mtime = 0;
283 v_atime = 0;
284 if (nfsd4_create_is_exclusive(open->op_createmode)) {
285 u32 *verifier = (u32 *)open->op_verf.data;
286
287 /*
288 * Solaris 7 gets confused (bugid 4218508) if these have
289 * the high bit set, as do xfs filesystems without the
290 * "bigtime" feature. So just clear the high bits. If this
291 * is ever changed to use different attrs for storing the
292 * verifier, then do_open_lookup() will also need to be
293 * fixed accordingly.
294 */
295 v_mtime = verifier[0] & 0x7fffffff;
296 v_atime = verifier[1] & 0x7fffffff;
297 }
298
299 if (d_really_is_positive(child)) {
300 status = nfs_ok;
301
302 /* NFSv4 protocol requires change attributes even though
303 * no change happened.
304 */
305 fh_fill_both_attrs(fhp);
306
307 switch (open->op_createmode) {
308 case NFS4_CREATE_UNCHECKED:
309 if (!d_is_reg(child))
310 break;
311
312 /*
313 * In NFSv4, we don't want to truncate the file
314 * now. This would be wrong if the OPEN fails for
315 * some other reason. Furthermore, if the size is
316 * nonzero, we should ignore it according to spec!
317 */
318 open->op_truncate = (iap->ia_valid & ATTR_SIZE) &&
319 !iap->ia_size;
320 break;
321 case NFS4_CREATE_GUARDED:
322 status = nfserr_exist;
323 break;
324 case NFS4_CREATE_EXCLUSIVE:
325 if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
326 d_inode(child)->i_atime.tv_sec == v_atime &&
327 d_inode(child)->i_size == 0) {
328 open->op_created = true;
329 break; /* subtle */
330 }
331 status = nfserr_exist;
332 break;
333 case NFS4_CREATE_EXCLUSIVE4_1:
334 if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
335 d_inode(child)->i_atime.tv_sec == v_atime &&
336 d_inode(child)->i_size == 0) {
337 open->op_created = true;
338 goto set_attr; /* subtle */
339 }
340 status = nfserr_exist;
341 }
342 goto out;
343 }
344
345 if (!IS_POSIXACL(inode))
346 iap->ia_mode &= ~current_umask();
347
348 fh_fill_pre_attrs(fhp);
349 status = nfsd4_vfs_create(fhp, child, open);
350 if (status != nfs_ok)
351 goto out;
352 open->op_created = true;
353 fh_fill_post_attrs(fhp);
354
355 /* A newly created file already has a file size of zero. */
356 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
357 iap->ia_valid &= ~ATTR_SIZE;
358 if (nfsd4_create_is_exclusive(open->op_createmode)) {
359 iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
360 ATTR_MTIME_SET|ATTR_ATIME_SET;
361 iap->ia_mtime.tv_sec = v_mtime;
362 iap->ia_atime.tv_sec = v_atime;
363 iap->ia_mtime.tv_nsec = 0;
364 iap->ia_atime.tv_nsec = 0;
365 }
366
367 set_attr:
368 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
369
370 if (attrs.na_labelerr)
371 open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
372 if (attrs.na_aclerr)
373 open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
374 out:
375 inode_unlock(inode);
376 nfsd_attrs_free(&attrs);
377 if (child && !IS_ERR(child))
378 dput(child);
379 fh_drop_write(fhp);
380 return status;
381 }
382
383 static __be32
do_open_lookup(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_open * open,struct svc_fh ** resfh)384 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
385 {
386 struct svc_fh *current_fh = &cstate->current_fh;
387 int accmode;
388 __be32 status;
389
390 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
391 if (!*resfh)
392 return nfserr_jukebox;
393 fh_init(*resfh, NFS4_FHSIZE);
394 open->op_truncate = false;
395
396 if (open->op_create) {
397 /* FIXME: check session persistence and pnfs flags.
398 * The nfsv4.1 spec requires the following semantics:
399 *
400 * Persistent | pNFS | Server REQUIRED | Client Allowed
401 * Reply Cache | server | |
402 * -------------+--------+-----------------+--------------------
403 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
404 * | | | (SHOULD)
405 * | | and EXCLUSIVE4 | or EXCLUSIVE4
406 * | | | (SHOULD NOT)
407 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
408 * yes | no | GUARDED4 | GUARDED4
409 * yes | yes | GUARDED4 | GUARDED4
410 */
411
412 current->fs->umask = open->op_umask;
413 status = nfsd4_create_file(rqstp, current_fh, *resfh, open);
414 current->fs->umask = 0;
415
416 /*
417 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
418 * use the returned bitmask to indicate which attributes
419 * we used to store the verifier:
420 */
421 if (nfsd4_create_is_exclusive(open->op_createmode) && status == 0)
422 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
423 FATTR4_WORD1_TIME_MODIFY);
424 } else {
425 status = nfsd_lookup(rqstp, current_fh,
426 open->op_fname, open->op_fnamelen, *resfh);
427 if (!status)
428 /* NFSv4 protocol requires change attributes even though
429 * no change happened.
430 */
431 fh_fill_both_attrs(current_fh);
432 }
433 if (status)
434 goto out;
435 status = nfsd_check_obj_isreg(*resfh);
436 if (status)
437 goto out;
438
439 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
440 accmode = NFSD_MAY_NOP;
441 if (open->op_created ||
442 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
443 accmode |= NFSD_MAY_OWNER_OVERRIDE;
444 status = do_open_permission(rqstp, *resfh, open, accmode);
445 set_change_info(&open->op_cinfo, current_fh);
446 out:
447 return status;
448 }
449
450 static __be32
do_open_fhandle(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_open * open)451 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
452 {
453 struct svc_fh *current_fh = &cstate->current_fh;
454 int accmode = 0;
455
456 /* We don't know the target directory, and therefore can not
457 * set the change info
458 */
459
460 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
461
462 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
463
464 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
465 (open->op_iattr.ia_size == 0);
466 /*
467 * In the delegation case, the client is telling us about an
468 * open that it *already* performed locally, some time ago. We
469 * should let it succeed now if possible.
470 *
471 * In the case of a CLAIM_FH open, on the other hand, the client
472 * may be counting on us to enforce permissions (the Linux 4.1
473 * client uses this for normal opens, for example).
474 */
475 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
476 accmode = NFSD_MAY_OWNER_OVERRIDE;
477
478 return do_open_permission(rqstp, current_fh, open, accmode);
479 }
480
481 static void
copy_clientid(clientid_t * clid,struct nfsd4_session * session)482 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
483 {
484 struct nfsd4_sessionid *sid =
485 (struct nfsd4_sessionid *)session->se_sessionid.data;
486
487 clid->cl_boot = sid->clientid.cl_boot;
488 clid->cl_id = sid->clientid.cl_id;
489 }
490
491 static __be32
nfsd4_open(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)492 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
493 union nfsd4_op_u *u)
494 {
495 struct nfsd4_open *open = &u->open;
496 __be32 status;
497 struct svc_fh *resfh = NULL;
498 struct net *net = SVC_NET(rqstp);
499 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
500 bool reclaim = false;
501
502 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
503 (int)open->op_fnamelen, open->op_fname,
504 open->op_openowner);
505
506 open->op_filp = NULL;
507 open->op_rqstp = rqstp;
508
509 /* This check required by spec. */
510 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
511 return nfserr_inval;
512
513 open->op_created = false;
514 /*
515 * RFC5661 18.51.3
516 * Before RECLAIM_COMPLETE done, server should deny new lock
517 */
518 if (nfsd4_has_session(cstate) &&
519 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
520 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
521 return nfserr_grace;
522
523 if (nfsd4_has_session(cstate))
524 copy_clientid(&open->op_clientid, cstate->session);
525
526 /* check seqid for replay. set nfs4_owner */
527 status = nfsd4_process_open1(cstate, open, nn);
528 if (status == nfserr_replay_me) {
529 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
530 fh_put(&cstate->current_fh);
531 fh_copy_shallow(&cstate->current_fh.fh_handle,
532 &rp->rp_openfh);
533 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
534 if (status)
535 dprintk("nfsd4_open: replay failed"
536 " restoring previous filehandle\n");
537 else
538 status = nfserr_replay_me;
539 }
540 if (status)
541 goto out;
542 if (open->op_xdr_error) {
543 status = open->op_xdr_error;
544 goto out;
545 }
546
547 status = nfsd4_check_open_attributes(rqstp, cstate, open);
548 if (status)
549 goto out;
550
551 /* Openowner is now set, so sequence id will get bumped. Now we need
552 * these checks before we do any creates: */
553 status = nfserr_grace;
554 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
555 goto out;
556 status = nfserr_no_grace;
557 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
558 goto out;
559
560 switch (open->op_claim_type) {
561 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
562 case NFS4_OPEN_CLAIM_NULL:
563 status = do_open_lookup(rqstp, cstate, open, &resfh);
564 if (status)
565 goto out;
566 break;
567 case NFS4_OPEN_CLAIM_PREVIOUS:
568 status = nfs4_check_open_reclaim(cstate->clp);
569 if (status)
570 goto out;
571 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
572 reclaim = true;
573 fallthrough;
574 case NFS4_OPEN_CLAIM_FH:
575 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
576 status = do_open_fhandle(rqstp, cstate, open);
577 if (status)
578 goto out;
579 resfh = &cstate->current_fh;
580 break;
581 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
582 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
583 status = nfserr_notsupp;
584 goto out;
585 default:
586 status = nfserr_inval;
587 goto out;
588 }
589
590 status = nfsd4_process_open2(rqstp, resfh, open);
591 if (status && open->op_created)
592 pr_warn("nfsd4_process_open2 failed to open newly-created file: status=%u\n",
593 be32_to_cpu(status));
594 if (reclaim && !status)
595 nn->somebody_reclaimed = true;
596 out:
597 if (open->op_filp) {
598 fput(open->op_filp);
599 open->op_filp = NULL;
600 }
601 if (resfh && resfh != &cstate->current_fh) {
602 fh_dup2(&cstate->current_fh, resfh);
603 fh_put(resfh);
604 kfree(resfh);
605 }
606 nfsd4_cleanup_open_state(cstate, open);
607 nfsd4_bump_seqid(cstate, status);
608 return status;
609 }
610
611 /*
612 * OPEN is the only seqid-mutating operation whose decoding can fail
613 * with a seqid-mutating error (specifically, decoding of user names in
614 * the attributes). Therefore we have to do some processing to look up
615 * the stateowner so that we can bump the seqid.
616 */
nfsd4_open_omfg(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_op * op)617 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
618 {
619 struct nfsd4_open *open = &op->u.open;
620
621 if (!seqid_mutating_err(ntohl(op->status)))
622 return op->status;
623 if (nfsd4_has_session(cstate))
624 return op->status;
625 open->op_xdr_error = op->status;
626 return nfsd4_open(rqstp, cstate, &op->u);
627 }
628
629 /*
630 * filehandle-manipulating ops.
631 */
632 static __be32
nfsd4_getfh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)633 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
634 union nfsd4_op_u *u)
635 {
636 u->getfh = &cstate->current_fh;
637 return nfs_ok;
638 }
639
640 static __be32
nfsd4_putfh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)641 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
642 union nfsd4_op_u *u)
643 {
644 struct nfsd4_putfh *putfh = &u->putfh;
645 __be32 ret;
646
647 fh_put(&cstate->current_fh);
648 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
649 memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval,
650 putfh->pf_fhlen);
651 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
652 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
653 if (ret == nfserr_stale && putfh->no_verify) {
654 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
655 ret = 0;
656 }
657 #endif
658 return ret;
659 }
660
661 static __be32
nfsd4_putrootfh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)662 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
663 union nfsd4_op_u *u)
664 {
665 fh_put(&cstate->current_fh);
666
667 return exp_pseudoroot(rqstp, &cstate->current_fh);
668 }
669
670 static __be32
nfsd4_restorefh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)671 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
672 union nfsd4_op_u *u)
673 {
674 if (!cstate->save_fh.fh_dentry)
675 return nfserr_restorefh;
676
677 fh_dup2(&cstate->current_fh, &cstate->save_fh);
678 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
679 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
680 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
681 }
682 return nfs_ok;
683 }
684
685 static __be32
nfsd4_savefh(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)686 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
687 union nfsd4_op_u *u)
688 {
689 fh_dup2(&cstate->save_fh, &cstate->current_fh);
690 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
691 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
692 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
693 }
694 return nfs_ok;
695 }
696
697 /*
698 * misc nfsv4 ops
699 */
700 static __be32
nfsd4_access(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)701 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
702 union nfsd4_op_u *u)
703 {
704 struct nfsd4_access *access = &u->access;
705 u32 access_full;
706
707 access_full = NFS3_ACCESS_FULL;
708 if (cstate->minorversion >= 2)
709 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
710 NFS4_ACCESS_XAWRITE;
711
712 if (access->ac_req_access & ~access_full)
713 return nfserr_inval;
714
715 access->ac_resp_access = access->ac_req_access;
716 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
717 &access->ac_supported);
718 }
719
gen_boot_verifier(nfs4_verifier * verifier,struct net * net)720 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
721 {
722 __be32 *verf = (__be32 *)verifier->data;
723
724 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
725
726 nfsd_copy_write_verifier(verf, net_generic(net, nfsd_net_id));
727 }
728
729 static __be32
nfsd4_commit(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)730 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
731 union nfsd4_op_u *u)
732 {
733 struct nfsd4_commit *commit = &u->commit;
734
735 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
736 commit->co_count,
737 (__be32 *)commit->co_verf.data);
738 }
739
740 static __be32
nfsd4_create(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)741 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 union nfsd4_op_u *u)
743 {
744 struct nfsd4_create *create = &u->create;
745 struct nfsd_attrs attrs = {
746 .na_iattr = &create->cr_iattr,
747 .na_seclabel = &create->cr_label,
748 };
749 struct svc_fh resfh;
750 __be32 status;
751 dev_t rdev;
752
753 fh_init(&resfh, NFS4_FHSIZE);
754
755 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
756 if (status)
757 return status;
758
759 status = check_attr_support(rqstp, cstate, create->cr_bmval,
760 nfsd_attrmask);
761 if (status)
762 return status;
763
764 status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
765 current->fs->umask = create->cr_umask;
766 switch (create->cr_type) {
767 case NF4LNK:
768 status = nfsd_symlink(rqstp, &cstate->current_fh,
769 create->cr_name, create->cr_namelen,
770 create->cr_data, &attrs, &resfh);
771 break;
772
773 case NF4BLK:
774 status = nfserr_inval;
775 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
776 if (MAJOR(rdev) != create->cr_specdata1 ||
777 MINOR(rdev) != create->cr_specdata2)
778 goto out_umask;
779 status = nfsd_create(rqstp, &cstate->current_fh,
780 create->cr_name, create->cr_namelen,
781 &attrs, S_IFBLK, rdev, &resfh);
782 break;
783
784 case NF4CHR:
785 status = nfserr_inval;
786 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
787 if (MAJOR(rdev) != create->cr_specdata1 ||
788 MINOR(rdev) != create->cr_specdata2)
789 goto out_umask;
790 status = nfsd_create(rqstp, &cstate->current_fh,
791 create->cr_name, create->cr_namelen,
792 &attrs, S_IFCHR, rdev, &resfh);
793 break;
794
795 case NF4SOCK:
796 status = nfsd_create(rqstp, &cstate->current_fh,
797 create->cr_name, create->cr_namelen,
798 &attrs, S_IFSOCK, 0, &resfh);
799 break;
800
801 case NF4FIFO:
802 status = nfsd_create(rqstp, &cstate->current_fh,
803 create->cr_name, create->cr_namelen,
804 &attrs, S_IFIFO, 0, &resfh);
805 break;
806
807 case NF4DIR:
808 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
809 status = nfsd_create(rqstp, &cstate->current_fh,
810 create->cr_name, create->cr_namelen,
811 &attrs, S_IFDIR, 0, &resfh);
812 break;
813
814 default:
815 status = nfserr_badtype;
816 }
817
818 if (status)
819 goto out;
820
821 if (attrs.na_labelerr)
822 create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
823 if (attrs.na_aclerr)
824 create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
825 set_change_info(&create->cr_cinfo, &cstate->current_fh);
826 fh_dup2(&cstate->current_fh, &resfh);
827 out:
828 fh_put(&resfh);
829 out_umask:
830 current->fs->umask = 0;
831 nfsd_attrs_free(&attrs);
832 return status;
833 }
834
835 static __be32
nfsd4_getattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)836 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
837 union nfsd4_op_u *u)
838 {
839 struct nfsd4_getattr *getattr = &u->getattr;
840 __be32 status;
841
842 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
843 if (status)
844 return status;
845
846 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
847 return nfserr_inval;
848
849 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
850 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
851 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
852
853 getattr->ga_fhp = &cstate->current_fh;
854 return nfs_ok;
855 }
856
857 static __be32
nfsd4_link(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)858 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
859 union nfsd4_op_u *u)
860 {
861 struct nfsd4_link *link = &u->link;
862 __be32 status;
863
864 status = nfsd_link(rqstp, &cstate->current_fh,
865 link->li_name, link->li_namelen, &cstate->save_fh);
866 if (!status)
867 set_change_info(&link->li_cinfo, &cstate->current_fh);
868 return status;
869 }
870
nfsd4_do_lookupp(struct svc_rqst * rqstp,struct svc_fh * fh)871 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
872 {
873 struct svc_fh tmp_fh;
874 __be32 ret;
875
876 fh_init(&tmp_fh, NFS4_FHSIZE);
877 ret = exp_pseudoroot(rqstp, &tmp_fh);
878 if (ret)
879 return ret;
880 if (tmp_fh.fh_dentry == fh->fh_dentry) {
881 fh_put(&tmp_fh);
882 return nfserr_noent;
883 }
884 fh_put(&tmp_fh);
885 return nfsd_lookup(rqstp, fh, "..", 2, fh);
886 }
887
888 static __be32
nfsd4_lookupp(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)889 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
890 union nfsd4_op_u *u)
891 {
892 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
893 }
894
895 static __be32
nfsd4_lookup(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)896 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
897 union nfsd4_op_u *u)
898 {
899 return nfsd_lookup(rqstp, &cstate->current_fh,
900 u->lookup.lo_name, u->lookup.lo_len,
901 &cstate->current_fh);
902 }
903
904 static __be32
nfsd4_read(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)905 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
906 union nfsd4_op_u *u)
907 {
908 struct nfsd4_read *read = &u->read;
909 __be32 status;
910
911 read->rd_nf = NULL;
912
913 trace_nfsd_read_start(rqstp, &cstate->current_fh,
914 read->rd_offset, read->rd_length);
915
916 read->rd_length = min_t(u32, read->rd_length, svc_max_payload(rqstp));
917 if (read->rd_offset > (u64)OFFSET_MAX)
918 read->rd_offset = (u64)OFFSET_MAX;
919 if (read->rd_offset + read->rd_length > (u64)OFFSET_MAX)
920 read->rd_length = (u64)OFFSET_MAX - read->rd_offset;
921
922 /*
923 * If we do a zero copy read, then a client will see read data
924 * that reflects the state of the file *after* performing the
925 * following compound.
926 *
927 * To ensure proper ordering, we therefore turn off zero copy if
928 * the client wants us to do more in this compound:
929 */
930 if (!nfsd4_last_compound_op(rqstp))
931 __clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
932
933 /* check stateid */
934 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
935 &read->rd_stateid, RD_STATE,
936 &read->rd_nf, NULL);
937 if (status) {
938 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
939 goto out;
940 }
941 status = nfs_ok;
942 out:
943 read->rd_rqstp = rqstp;
944 read->rd_fhp = &cstate->current_fh;
945 return status;
946 }
947
948
949 static void
nfsd4_read_release(union nfsd4_op_u * u)950 nfsd4_read_release(union nfsd4_op_u *u)
951 {
952 if (u->read.rd_nf)
953 nfsd_file_put(u->read.rd_nf);
954 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
955 u->read.rd_offset, u->read.rd_length);
956 }
957
958 static __be32
nfsd4_readdir(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)959 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
960 union nfsd4_op_u *u)
961 {
962 struct nfsd4_readdir *readdir = &u->readdir;
963 u64 cookie = readdir->rd_cookie;
964 static const nfs4_verifier zeroverf;
965
966 /* no need to check permission - this will be done in nfsd_readdir() */
967
968 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
969 return nfserr_inval;
970
971 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
972 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
973 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
974
975 if ((cookie == 1) || (cookie == 2) ||
976 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
977 return nfserr_bad_cookie;
978
979 readdir->rd_rqstp = rqstp;
980 readdir->rd_fhp = &cstate->current_fh;
981 return nfs_ok;
982 }
983
984 static __be32
nfsd4_readlink(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)985 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
986 union nfsd4_op_u *u)
987 {
988 u->readlink.rl_rqstp = rqstp;
989 u->readlink.rl_fhp = &cstate->current_fh;
990 return nfs_ok;
991 }
992
993 static __be32
nfsd4_remove(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)994 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
995 union nfsd4_op_u *u)
996 {
997 struct nfsd4_remove *remove = &u->remove;
998 __be32 status;
999
1000 if (opens_in_grace(SVC_NET(rqstp)))
1001 return nfserr_grace;
1002 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
1003 remove->rm_name, remove->rm_namelen);
1004 if (!status)
1005 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1006 return status;
1007 }
1008
1009 static __be32
nfsd4_rename(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1010 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1011 union nfsd4_op_u *u)
1012 {
1013 struct nfsd4_rename *rename = &u->rename;
1014 __be32 status;
1015
1016 if (opens_in_grace(SVC_NET(rqstp)))
1017 return nfserr_grace;
1018 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
1019 rename->rn_snamelen, &cstate->current_fh,
1020 rename->rn_tname, rename->rn_tnamelen);
1021 if (status)
1022 return status;
1023 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
1024 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
1025 return nfs_ok;
1026 }
1027
1028 static __be32
nfsd4_secinfo(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1029 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1030 union nfsd4_op_u *u)
1031 {
1032 struct nfsd4_secinfo *secinfo = &u->secinfo;
1033 struct svc_export *exp;
1034 struct dentry *dentry;
1035 __be32 err;
1036
1037 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
1038 if (err)
1039 return err;
1040 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
1041 secinfo->si_name, secinfo->si_namelen,
1042 &exp, &dentry);
1043 if (err)
1044 return err;
1045 if (d_really_is_negative(dentry)) {
1046 exp_put(exp);
1047 err = nfserr_noent;
1048 } else
1049 secinfo->si_exp = exp;
1050 dput(dentry);
1051 if (cstate->minorversion)
1052 /* See rfc 5661 section 2.6.3.1.1.8 */
1053 fh_put(&cstate->current_fh);
1054 return err;
1055 }
1056
1057 static __be32
nfsd4_secinfo_no_name(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1058 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1059 union nfsd4_op_u *u)
1060 {
1061 __be32 err;
1062
1063 switch (u->secinfo_no_name.sin_style) {
1064 case NFS4_SECINFO_STYLE4_CURRENT_FH:
1065 break;
1066 case NFS4_SECINFO_STYLE4_PARENT:
1067 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1068 if (err)
1069 return err;
1070 break;
1071 default:
1072 return nfserr_inval;
1073 }
1074
1075 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
1076 fh_put(&cstate->current_fh);
1077 return nfs_ok;
1078 }
1079
1080 static void
nfsd4_secinfo_release(union nfsd4_op_u * u)1081 nfsd4_secinfo_release(union nfsd4_op_u *u)
1082 {
1083 if (u->secinfo.si_exp)
1084 exp_put(u->secinfo.si_exp);
1085 }
1086
1087 static void
nfsd4_secinfo_no_name_release(union nfsd4_op_u * u)1088 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
1089 {
1090 if (u->secinfo_no_name.sin_exp)
1091 exp_put(u->secinfo_no_name.sin_exp);
1092 }
1093
1094 static __be32
nfsd4_setattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1095 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1096 union nfsd4_op_u *u)
1097 {
1098 struct nfsd4_setattr *setattr = &u->setattr;
1099 struct nfsd_attrs attrs = {
1100 .na_iattr = &setattr->sa_iattr,
1101 .na_seclabel = &setattr->sa_label,
1102 };
1103 struct inode *inode;
1104 __be32 status = nfs_ok;
1105 int err;
1106
1107 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
1108 status = nfs4_preprocess_stateid_op(rqstp, cstate,
1109 &cstate->current_fh, &setattr->sa_stateid,
1110 WR_STATE, NULL, NULL);
1111 if (status) {
1112 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
1113 return status;
1114 }
1115 }
1116 err = fh_want_write(&cstate->current_fh);
1117 if (err)
1118 return nfserrno(err);
1119 status = nfs_ok;
1120
1121 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
1122 nfsd_attrmask);
1123 if (status)
1124 goto out;
1125
1126 inode = cstate->current_fh.fh_dentry->d_inode;
1127 status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
1128 setattr->sa_acl, &attrs);
1129
1130 if (status)
1131 goto out;
1132 status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
1133 0, (time64_t)0);
1134 if (!status)
1135 status = nfserrno(attrs.na_labelerr);
1136 out:
1137 nfsd_attrs_free(&attrs);
1138 fh_drop_write(&cstate->current_fh);
1139 return status;
1140 }
1141
1142 static __be32
nfsd4_write(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1143 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1144 union nfsd4_op_u *u)
1145 {
1146 struct nfsd4_write *write = &u->write;
1147 stateid_t *stateid = &write->wr_stateid;
1148 struct nfsd_file *nf = NULL;
1149 __be32 status = nfs_ok;
1150 unsigned long cnt;
1151 int nvecs;
1152
1153 if (write->wr_offset > (u64)OFFSET_MAX ||
1154 write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
1155 return nfserr_fbig;
1156
1157 cnt = write->wr_buflen;
1158 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1159 write->wr_offset, cnt);
1160 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1161 stateid, WR_STATE, &nf, NULL);
1162 if (status) {
1163 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1164 return status;
1165 }
1166
1167 write->wr_how_written = write->wr_stable_how;
1168
1169 nvecs = svc_fill_write_vector(rqstp, &write->wr_payload);
1170 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1171
1172 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1173 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1174 write->wr_how_written,
1175 (__be32 *)write->wr_verifier.data);
1176 nfsd_file_put(nf);
1177
1178 write->wr_bytes_written = cnt;
1179 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1180 write->wr_offset, cnt);
1181 return status;
1182 }
1183
1184 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)1185 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1186 stateid_t *src_stateid, struct nfsd_file **src,
1187 stateid_t *dst_stateid, struct nfsd_file **dst)
1188 {
1189 __be32 status;
1190
1191 if (!cstate->save_fh.fh_dentry)
1192 return nfserr_nofilehandle;
1193
1194 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1195 src_stateid, RD_STATE, src, NULL);
1196 if (status) {
1197 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1198 goto out;
1199 }
1200
1201 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1202 dst_stateid, WR_STATE, dst, NULL);
1203 if (status) {
1204 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1205 goto out_put_src;
1206 }
1207
1208 /* fix up for NFS-specific error code */
1209 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1210 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1211 status = nfserr_wrong_type;
1212 goto out_put_dst;
1213 }
1214
1215 out:
1216 return status;
1217 out_put_dst:
1218 nfsd_file_put(*dst);
1219 out_put_src:
1220 nfsd_file_put(*src);
1221 goto out;
1222 }
1223
1224 static __be32
nfsd4_clone(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1225 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1226 union nfsd4_op_u *u)
1227 {
1228 struct nfsd4_clone *clone = &u->clone;
1229 struct nfsd_file *src, *dst;
1230 __be32 status;
1231
1232 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1233 &clone->cl_dst_stateid, &dst);
1234 if (status)
1235 goto out;
1236
1237 status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos,
1238 dst, clone->cl_dst_pos, clone->cl_count,
1239 EX_ISSYNC(cstate->current_fh.fh_export));
1240
1241 nfsd_file_put(dst);
1242 nfsd_file_put(src);
1243 out:
1244 return status;
1245 }
1246
nfs4_put_copy(struct nfsd4_copy * copy)1247 static void nfs4_put_copy(struct nfsd4_copy *copy)
1248 {
1249 if (!refcount_dec_and_test(©->refcount))
1250 return;
1251 kfree(copy->cp_src);
1252 kfree(copy);
1253 }
1254
nfsd4_stop_copy(struct nfsd4_copy * copy)1255 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1256 {
1257 if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags))
1258 kthread_stop(copy->copy_task);
1259 nfs4_put_copy(copy);
1260 }
1261
nfsd4_get_copy(struct nfs4_client * clp)1262 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1263 {
1264 struct nfsd4_copy *copy = NULL;
1265
1266 spin_lock(&clp->async_lock);
1267 if (!list_empty(&clp->async_copies)) {
1268 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1269 copies);
1270 refcount_inc(©->refcount);
1271 }
1272 spin_unlock(&clp->async_lock);
1273 return copy;
1274 }
1275
nfsd4_shutdown_copy(struct nfs4_client * clp)1276 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1277 {
1278 struct nfsd4_copy *copy;
1279
1280 while ((copy = nfsd4_get_copy(clp)) != NULL)
1281 nfsd4_stop_copy(copy);
1282 }
1283 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
1284
1285 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1286 struct nfs_fh *src_fh,
1287 nfs4_stateid *stateid);
1288 extern void nfs42_ssc_close(struct file *filep);
1289
1290 extern void nfs_sb_deactive(struct super_block *sb);
1291
1292 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1293
1294 /*
1295 * setup a work entry in the ssc delayed unmount list.
1296 */
nfsd4_ssc_setup_dul(struct nfsd_net * nn,char * ipaddr,struct nfsd4_ssc_umount_item ** retwork,struct vfsmount ** ss_mnt)1297 static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
1298 struct nfsd4_ssc_umount_item **retwork, struct vfsmount **ss_mnt)
1299 {
1300 struct nfsd4_ssc_umount_item *ni = NULL;
1301 struct nfsd4_ssc_umount_item *work = NULL;
1302 struct nfsd4_ssc_umount_item *tmp;
1303 DEFINE_WAIT(wait);
1304
1305 *ss_mnt = NULL;
1306 *retwork = NULL;
1307 work = kzalloc(sizeof(*work), GFP_KERNEL);
1308 try_again:
1309 spin_lock(&nn->nfsd_ssc_lock);
1310 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1311 if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
1312 continue;
1313 /* found a match */
1314 if (ni->nsui_busy) {
1315 /* wait - and try again */
1316 prepare_to_wait(&nn->nfsd_ssc_waitq, &wait,
1317 TASK_INTERRUPTIBLE);
1318 spin_unlock(&nn->nfsd_ssc_lock);
1319
1320 /* allow 20secs for mount/unmount for now - revisit */
1321 if (signal_pending(current) ||
1322 (schedule_timeout(20*HZ) == 0)) {
1323 kfree(work);
1324 return nfserr_eagain;
1325 }
1326 finish_wait(&nn->nfsd_ssc_waitq, &wait);
1327 goto try_again;
1328 }
1329 *ss_mnt = ni->nsui_vfsmount;
1330 refcount_inc(&ni->nsui_refcnt);
1331 spin_unlock(&nn->nfsd_ssc_lock);
1332 kfree(work);
1333
1334 /* return vfsmount in ss_mnt */
1335 return 0;
1336 }
1337 if (work) {
1338 strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
1339 refcount_set(&work->nsui_refcnt, 2);
1340 work->nsui_busy = true;
1341 list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
1342 *retwork = work;
1343 }
1344 spin_unlock(&nn->nfsd_ssc_lock);
1345 return 0;
1346 }
1347
nfsd4_ssc_update_dul_work(struct nfsd_net * nn,struct nfsd4_ssc_umount_item * work,struct vfsmount * ss_mnt)1348 static void nfsd4_ssc_update_dul_work(struct nfsd_net *nn,
1349 struct nfsd4_ssc_umount_item *work, struct vfsmount *ss_mnt)
1350 {
1351 /* set nsui_vfsmount, clear busy flag and wakeup waiters */
1352 spin_lock(&nn->nfsd_ssc_lock);
1353 work->nsui_vfsmount = ss_mnt;
1354 work->nsui_busy = false;
1355 wake_up_all(&nn->nfsd_ssc_waitq);
1356 spin_unlock(&nn->nfsd_ssc_lock);
1357 }
1358
nfsd4_ssc_cancel_dul_work(struct nfsd_net * nn,struct nfsd4_ssc_umount_item * work)1359 static void nfsd4_ssc_cancel_dul_work(struct nfsd_net *nn,
1360 struct nfsd4_ssc_umount_item *work)
1361 {
1362 spin_lock(&nn->nfsd_ssc_lock);
1363 list_del(&work->nsui_list);
1364 wake_up_all(&nn->nfsd_ssc_waitq);
1365 spin_unlock(&nn->nfsd_ssc_lock);
1366 kfree(work);
1367 }
1368
1369 /*
1370 * Support one copy source server for now.
1371 */
1372 static __be32
nfsd4_interssc_connect(struct nl4_server * nss,struct svc_rqst * rqstp,struct vfsmount ** mount)1373 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1374 struct vfsmount **mount)
1375 {
1376 struct file_system_type *type;
1377 struct vfsmount *ss_mnt;
1378 struct nfs42_netaddr *naddr;
1379 struct sockaddr_storage tmp_addr;
1380 size_t tmp_addrlen, match_netid_len = 3;
1381 char *startsep = "", *endsep = "", *match_netid = "tcp";
1382 char *ipaddr, *dev_name, *raw_data;
1383 int len, raw_len;
1384 __be32 status = nfserr_inval;
1385 struct nfsd4_ssc_umount_item *work = NULL;
1386 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1387
1388 naddr = &nss->u.nl4_addr;
1389 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1390 naddr->addr_len,
1391 (struct sockaddr *)&tmp_addr,
1392 sizeof(tmp_addr));
1393 if (tmp_addrlen == 0)
1394 goto out_err;
1395
1396 if (tmp_addr.ss_family == AF_INET6) {
1397 startsep = "[";
1398 endsep = "]";
1399 match_netid = "tcp6";
1400 match_netid_len = 4;
1401 }
1402
1403 if (naddr->netid_len != match_netid_len ||
1404 strncmp(naddr->netid, match_netid, naddr->netid_len))
1405 goto out_err;
1406
1407 /* Construct the raw data for the vfs_kern_mount call */
1408 len = RPC_MAX_ADDRBUFLEN + 1;
1409 ipaddr = kzalloc(len, GFP_KERNEL);
1410 if (!ipaddr)
1411 goto out_err;
1412
1413 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1414
1415 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1416
1417 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1418 raw_data = kzalloc(raw_len, GFP_KERNEL);
1419 if (!raw_data)
1420 goto out_free_ipaddr;
1421
1422 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1423
1424 status = nfserr_nodev;
1425 type = get_fs_type("nfs");
1426 if (!type)
1427 goto out_free_rawdata;
1428
1429 /* Set the server:<export> for the vfs_kern_mount call */
1430 dev_name = kzalloc(len + 5, GFP_KERNEL);
1431 if (!dev_name)
1432 goto out_free_rawdata;
1433 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1434
1435 status = nfsd4_ssc_setup_dul(nn, ipaddr, &work, &ss_mnt);
1436 if (status)
1437 goto out_free_devname;
1438 if (ss_mnt)
1439 goto out_done;
1440
1441 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1442 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1443 module_put(type->owner);
1444 if (IS_ERR(ss_mnt)) {
1445 status = nfserr_nodev;
1446 if (work)
1447 nfsd4_ssc_cancel_dul_work(nn, work);
1448 goto out_free_devname;
1449 }
1450 if (work)
1451 nfsd4_ssc_update_dul_work(nn, work, ss_mnt);
1452 out_done:
1453 status = 0;
1454 *mount = ss_mnt;
1455
1456 out_free_devname:
1457 kfree(dev_name);
1458 out_free_rawdata:
1459 kfree(raw_data);
1460 out_free_ipaddr:
1461 kfree(ipaddr);
1462 out_err:
1463 return status;
1464 }
1465
1466 static void
nfsd4_interssc_disconnect(struct vfsmount * ss_mnt)1467 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1468 {
1469 nfs_do_sb_deactive(ss_mnt->mnt_sb);
1470 mntput(ss_mnt);
1471 }
1472
1473 /*
1474 * Verify COPY destination stateid.
1475 *
1476 * Connect to the source server with NFSv4.1.
1477 * Create the source struct file for nfsd_copy_range.
1478 * Called with COPY cstate:
1479 * SAVED_FH: source filehandle
1480 * CURRENT_FH: destination filehandle
1481 */
1482 static __be32
nfsd4_setup_inter_ssc(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_copy * copy,struct vfsmount ** mount)1483 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1484 struct nfsd4_compound_state *cstate,
1485 struct nfsd4_copy *copy, struct vfsmount **mount)
1486 {
1487 struct svc_fh *s_fh = NULL;
1488 stateid_t *s_stid = ©->cp_src_stateid;
1489 __be32 status = nfserr_inval;
1490
1491 /* Verify the destination stateid and set dst struct file*/
1492 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1493 ©->cp_dst_stateid,
1494 WR_STATE, ©->nf_dst, NULL);
1495 if (status)
1496 goto out;
1497
1498 status = nfsd4_interssc_connect(copy->cp_src, rqstp, mount);
1499 if (status)
1500 goto out;
1501
1502 s_fh = &cstate->save_fh;
1503
1504 copy->c_fh.size = s_fh->fh_handle.fh_size;
1505 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
1506 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1507 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1508 sizeof(stateid_opaque_t));
1509
1510 status = 0;
1511 out:
1512 return status;
1513 }
1514
1515 static void
nfsd4_cleanup_inter_ssc(struct vfsmount * ss_mnt,struct file * filp,struct nfsd_file * dst)1516 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct file *filp,
1517 struct nfsd_file *dst)
1518 {
1519 bool found = false;
1520 long timeout;
1521 struct nfsd4_ssc_umount_item *tmp;
1522 struct nfsd4_ssc_umount_item *ni = NULL;
1523 struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
1524
1525 nfs42_ssc_close(filp);
1526 nfsd_file_put(dst);
1527 fput(filp);
1528
1529 if (!nn) {
1530 mntput(ss_mnt);
1531 return;
1532 }
1533 spin_lock(&nn->nfsd_ssc_lock);
1534 timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
1535 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1536 if (ni->nsui_vfsmount->mnt_sb == ss_mnt->mnt_sb) {
1537 list_del(&ni->nsui_list);
1538 /*
1539 * vfsmount can be shared by multiple exports,
1540 * decrement refcnt. If the count drops to 1 it
1541 * will be unmounted when nsui_expire expires.
1542 */
1543 refcount_dec(&ni->nsui_refcnt);
1544 ni->nsui_expire = jiffies + timeout;
1545 list_add_tail(&ni->nsui_list, &nn->nfsd_ssc_mount_list);
1546 found = true;
1547 break;
1548 }
1549 }
1550 spin_unlock(&nn->nfsd_ssc_lock);
1551 if (!found) {
1552 mntput(ss_mnt);
1553 return;
1554 }
1555 }
1556
1557 #else /* CONFIG_NFSD_V4_2_INTER_SSC */
1558
1559 static __be32
nfsd4_setup_inter_ssc(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_copy * copy,struct vfsmount ** mount)1560 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1561 struct nfsd4_compound_state *cstate,
1562 struct nfsd4_copy *copy,
1563 struct vfsmount **mount)
1564 {
1565 *mount = NULL;
1566 return nfserr_inval;
1567 }
1568
1569 static void
nfsd4_cleanup_inter_ssc(struct vfsmount * ss_mnt,struct file * filp,struct nfsd_file * dst)1570 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct file *filp,
1571 struct nfsd_file *dst)
1572 {
1573 }
1574
1575 static void
nfsd4_interssc_disconnect(struct vfsmount * ss_mnt)1576 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1577 {
1578 }
1579
nfs42_ssc_open(struct vfsmount * ss_mnt,struct nfs_fh * src_fh,nfs4_stateid * stateid)1580 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1581 struct nfs_fh *src_fh,
1582 nfs4_stateid *stateid)
1583 {
1584 return NULL;
1585 }
1586 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1587
1588 static __be32
nfsd4_setup_intra_ssc(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_copy * copy)1589 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1590 struct nfsd4_compound_state *cstate,
1591 struct nfsd4_copy *copy)
1592 {
1593 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1594 ©->nf_src, ©->cp_dst_stateid,
1595 ©->nf_dst);
1596 }
1597
1598 static void
nfsd4_cleanup_intra_ssc(struct nfsd_file * src,struct nfsd_file * dst)1599 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1600 {
1601 nfsd_file_put(src);
1602 nfsd_file_put(dst);
1603 }
1604
nfsd4_cb_offload_release(struct nfsd4_callback * cb)1605 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1606 {
1607 struct nfsd4_cb_offload *cbo =
1608 container_of(cb, struct nfsd4_cb_offload, co_cb);
1609
1610 kfree(cbo);
1611 }
1612
nfsd4_cb_offload_done(struct nfsd4_callback * cb,struct rpc_task * task)1613 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1614 struct rpc_task *task)
1615 {
1616 struct nfsd4_cb_offload *cbo =
1617 container_of(cb, struct nfsd4_cb_offload, co_cb);
1618
1619 trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task);
1620 return 1;
1621 }
1622
1623 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1624 .release = nfsd4_cb_offload_release,
1625 .done = nfsd4_cb_offload_done
1626 };
1627
nfsd4_init_copy_res(struct nfsd4_copy * copy,bool sync)1628 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1629 {
1630 copy->cp_res.wr_stable_how =
1631 test_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags) ?
1632 NFS_FILE_SYNC : NFS_UNSTABLE;
1633 nfsd4_copy_set_sync(copy, sync);
1634 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1635 }
1636
_nfsd_copy_file_range(struct nfsd4_copy * copy,struct file * dst,struct file * src)1637 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
1638 struct file *dst,
1639 struct file *src)
1640 {
1641 errseq_t since;
1642 ssize_t bytes_copied = 0;
1643 u64 bytes_total = copy->cp_count;
1644 u64 src_pos = copy->cp_src_pos;
1645 u64 dst_pos = copy->cp_dst_pos;
1646 int status;
1647
1648 /* See RFC 7862 p.67: */
1649 if (bytes_total == 0)
1650 bytes_total = ULLONG_MAX;
1651 do {
1652 if (kthread_should_stop())
1653 break;
1654 bytes_copied = nfsd_copy_file_range(src, src_pos, dst, dst_pos,
1655 bytes_total);
1656 if (bytes_copied <= 0)
1657 break;
1658 bytes_total -= bytes_copied;
1659 copy->cp_res.wr_bytes_written += bytes_copied;
1660 src_pos += bytes_copied;
1661 dst_pos += bytes_copied;
1662 } while (bytes_total > 0 && nfsd4_copy_is_async(copy));
1663 /* for a non-zero asynchronous copy do a commit of data */
1664 if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
1665 since = READ_ONCE(dst->f_wb_err);
1666 status = vfs_fsync_range(dst, copy->cp_dst_pos,
1667 copy->cp_res.wr_bytes_written, 0);
1668 if (!status)
1669 status = filemap_check_wb_err(dst->f_mapping, since);
1670 if (!status)
1671 set_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags);
1672 }
1673 return bytes_copied;
1674 }
1675
nfsd4_do_copy(struct nfsd4_copy * copy,struct file * src,struct file * dst,bool sync)1676 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
1677 struct file *src, struct file *dst,
1678 bool sync)
1679 {
1680 __be32 status;
1681 ssize_t bytes;
1682
1683 bytes = _nfsd_copy_file_range(copy, dst, src);
1684
1685 /* for async copy, we ignore the error, client can always retry
1686 * to get the error
1687 */
1688 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1689 status = nfserrno(bytes);
1690 else {
1691 nfsd4_init_copy_res(copy, sync);
1692 status = nfs_ok;
1693 }
1694 return status;
1695 }
1696
dup_copy_fields(struct nfsd4_copy * src,struct nfsd4_copy * dst)1697 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1698 {
1699 dst->cp_src_pos = src->cp_src_pos;
1700 dst->cp_dst_pos = src->cp_dst_pos;
1701 dst->cp_count = src->cp_count;
1702 dst->cp_flags = src->cp_flags;
1703 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1704 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1705 dst->cp_clp = src->cp_clp;
1706 dst->nf_dst = nfsd_file_get(src->nf_dst);
1707 /* for inter, nf_src doesn't exist yet */
1708 if (!nfsd4_ssc_is_inter(src))
1709 dst->nf_src = nfsd_file_get(src->nf_src);
1710
1711 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1712 memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server));
1713 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1714 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1715 dst->ss_mnt = src->ss_mnt;
1716 }
1717
cleanup_async_copy(struct nfsd4_copy * copy)1718 static void cleanup_async_copy(struct nfsd4_copy *copy)
1719 {
1720 nfs4_free_copy_state(copy);
1721 nfsd_file_put(copy->nf_dst);
1722 if (!nfsd4_ssc_is_inter(copy))
1723 nfsd_file_put(copy->nf_src);
1724 spin_lock(©->cp_clp->async_lock);
1725 list_del(©->copies);
1726 spin_unlock(©->cp_clp->async_lock);
1727 nfs4_put_copy(copy);
1728 }
1729
nfsd4_send_cb_offload(struct nfsd4_copy * copy,__be32 nfserr)1730 static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr)
1731 {
1732 struct nfsd4_cb_offload *cbo;
1733
1734 cbo = kzalloc(sizeof(*cbo), GFP_KERNEL);
1735 if (!cbo)
1736 return;
1737
1738 memcpy(&cbo->co_res, ©->cp_res, sizeof(copy->cp_res));
1739 memcpy(&cbo->co_fh, ©->fh, sizeof(copy->fh));
1740 cbo->co_nfserr = nfserr;
1741
1742 nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops,
1743 NFSPROC4_CLNT_CB_OFFLOAD);
1744 trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid,
1745 &cbo->co_fh, copy->cp_count, nfserr);
1746 nfsd4_run_cb(&cbo->co_cb);
1747 }
1748
1749 /**
1750 * nfsd4_do_async_copy - kthread function for background server-side COPY
1751 * @data: arguments for COPY operation
1752 *
1753 * Return values:
1754 * %0: Copy operation is done.
1755 */
nfsd4_do_async_copy(void * data)1756 static int nfsd4_do_async_copy(void *data)
1757 {
1758 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1759 __be32 nfserr;
1760
1761 if (nfsd4_ssc_is_inter(copy)) {
1762 struct file *filp;
1763
1764 filp = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1765 ©->stateid);
1766 if (IS_ERR(filp)) {
1767 switch (PTR_ERR(filp)) {
1768 case -EBADF:
1769 nfserr = nfserr_wrong_type;
1770 break;
1771 default:
1772 nfserr = nfserr_offload_denied;
1773 }
1774 nfsd4_interssc_disconnect(copy->ss_mnt);
1775 goto do_callback;
1776 }
1777 nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file,
1778 false);
1779 nfsd4_cleanup_inter_ssc(copy->ss_mnt, filp, copy->nf_dst);
1780 } else {
1781 nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
1782 copy->nf_dst->nf_file, false);
1783 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1784 }
1785
1786 do_callback:
1787 nfsd4_send_cb_offload(copy, nfserr);
1788 cleanup_async_copy(copy);
1789 return 0;
1790 }
1791
1792 static __be32
nfsd4_copy(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1793 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1794 union nfsd4_op_u *u)
1795 {
1796 struct nfsd4_copy *copy = &u->copy;
1797 __be32 status;
1798 struct nfsd4_copy *async_copy = NULL;
1799
1800 if (nfsd4_ssc_is_inter(copy)) {
1801 if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
1802 status = nfserr_notsupp;
1803 goto out;
1804 }
1805 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1806 ©->ss_mnt);
1807 if (status)
1808 return nfserr_offload_denied;
1809 } else {
1810 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1811 if (status)
1812 return status;
1813 }
1814
1815 copy->cp_clp = cstate->clp;
1816 memcpy(©->fh, &cstate->current_fh.fh_handle,
1817 sizeof(struct knfsd_fh));
1818 if (nfsd4_copy_is_async(copy)) {
1819 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1820
1821 status = nfserrno(-ENOMEM);
1822 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1823 if (!async_copy)
1824 goto out_err;
1825 async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL);
1826 if (!async_copy->cp_src)
1827 goto out_err;
1828 if (!nfs4_init_copy_state(nn, copy))
1829 goto out_err;
1830 refcount_set(&async_copy->refcount, 1);
1831 memcpy(©->cp_res.cb_stateid, ©->cp_stateid.cs_stid,
1832 sizeof(copy->cp_res.cb_stateid));
1833 dup_copy_fields(copy, async_copy);
1834 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1835 async_copy, "%s", "copy thread");
1836 if (IS_ERR(async_copy->copy_task))
1837 goto out_err;
1838 spin_lock(&async_copy->cp_clp->async_lock);
1839 list_add(&async_copy->copies,
1840 &async_copy->cp_clp->async_copies);
1841 spin_unlock(&async_copy->cp_clp->async_lock);
1842 wake_up_process(async_copy->copy_task);
1843 status = nfs_ok;
1844 } else {
1845 status = nfsd4_do_copy(copy, copy->nf_src->nf_file,
1846 copy->nf_dst->nf_file, true);
1847 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1848 }
1849 out:
1850 return status;
1851 out_err:
1852 if (async_copy)
1853 cleanup_async_copy(async_copy);
1854 status = nfserrno(-ENOMEM);
1855 if (nfsd4_ssc_is_inter(copy))
1856 nfsd4_interssc_disconnect(copy->ss_mnt);
1857 goto out;
1858 }
1859
1860 struct nfsd4_copy *
find_async_copy(struct nfs4_client * clp,stateid_t * stateid)1861 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1862 {
1863 struct nfsd4_copy *copy;
1864
1865 spin_lock(&clp->async_lock);
1866 list_for_each_entry(copy, &clp->async_copies, copies) {
1867 if (memcmp(©->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE))
1868 continue;
1869 refcount_inc(©->refcount);
1870 spin_unlock(&clp->async_lock);
1871 return copy;
1872 }
1873 spin_unlock(&clp->async_lock);
1874 return NULL;
1875 }
1876
1877 static __be32
nfsd4_offload_cancel(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1878 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1879 struct nfsd4_compound_state *cstate,
1880 union nfsd4_op_u *u)
1881 {
1882 struct nfsd4_offload_status *os = &u->offload_status;
1883 struct nfsd4_copy *copy;
1884 struct nfs4_client *clp = cstate->clp;
1885
1886 copy = find_async_copy(clp, &os->stateid);
1887 if (!copy) {
1888 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1889
1890 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1891 } else
1892 nfsd4_stop_copy(copy);
1893
1894 return nfs_ok;
1895 }
1896
1897 static __be32
nfsd4_copy_notify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1898 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1899 union nfsd4_op_u *u)
1900 {
1901 struct nfsd4_copy_notify *cn = &u->copy_notify;
1902 __be32 status;
1903 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1904 struct nfs4_stid *stid;
1905 struct nfs4_cpntf_state *cps;
1906 struct nfs4_client *clp = cstate->clp;
1907
1908 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1909 &cn->cpn_src_stateid, RD_STATE, NULL,
1910 &stid);
1911 if (status)
1912 return status;
1913
1914 cn->cpn_sec = nn->nfsd4_lease;
1915 cn->cpn_nsec = 0;
1916
1917 status = nfserrno(-ENOMEM);
1918 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1919 if (!cps)
1920 goto out;
1921 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t));
1922 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1923 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1924
1925 /* For now, only return one server address in cpn_src, the
1926 * address used by the client to connect to this server.
1927 */
1928 cn->cpn_src->nl4_type = NL4_NETADDR;
1929 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1930 &cn->cpn_src->u.nl4_addr);
1931 WARN_ON_ONCE(status);
1932 if (status) {
1933 nfs4_put_cpntf_state(nn, cps);
1934 goto out;
1935 }
1936 out:
1937 nfs4_put_stid(stid);
1938 return status;
1939 }
1940
1941 static __be32
nfsd4_fallocate(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_fallocate * fallocate,int flags)1942 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1943 struct nfsd4_fallocate *fallocate, int flags)
1944 {
1945 __be32 status;
1946 struct nfsd_file *nf;
1947
1948 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1949 &fallocate->falloc_stateid,
1950 WR_STATE, &nf, NULL);
1951 if (status != nfs_ok) {
1952 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1953 return status;
1954 }
1955
1956 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1957 fallocate->falloc_offset,
1958 fallocate->falloc_length,
1959 flags);
1960 nfsd_file_put(nf);
1961 return status;
1962 }
1963 static __be32
nfsd4_offload_status(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1964 nfsd4_offload_status(struct svc_rqst *rqstp,
1965 struct nfsd4_compound_state *cstate,
1966 union nfsd4_op_u *u)
1967 {
1968 struct nfsd4_offload_status *os = &u->offload_status;
1969 __be32 status = 0;
1970 struct nfsd4_copy *copy;
1971 struct nfs4_client *clp = cstate->clp;
1972
1973 copy = find_async_copy(clp, &os->stateid);
1974 if (copy) {
1975 os->count = copy->cp_res.wr_bytes_written;
1976 nfs4_put_copy(copy);
1977 } else
1978 status = nfserr_bad_stateid;
1979
1980 return status;
1981 }
1982
1983 static __be32
nfsd4_allocate(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1984 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1985 union nfsd4_op_u *u)
1986 {
1987 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1988 }
1989
1990 static __be32
nfsd4_deallocate(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1991 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1992 union nfsd4_op_u *u)
1993 {
1994 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1995 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1996 }
1997
1998 static __be32
nfsd4_seek(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)1999 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2000 union nfsd4_op_u *u)
2001 {
2002 struct nfsd4_seek *seek = &u->seek;
2003 int whence;
2004 __be32 status;
2005 struct nfsd_file *nf;
2006
2007 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
2008 &seek->seek_stateid,
2009 RD_STATE, &nf, NULL);
2010 if (status) {
2011 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
2012 return status;
2013 }
2014
2015 switch (seek->seek_whence) {
2016 case NFS4_CONTENT_DATA:
2017 whence = SEEK_DATA;
2018 break;
2019 case NFS4_CONTENT_HOLE:
2020 whence = SEEK_HOLE;
2021 break;
2022 default:
2023 status = nfserr_union_notsupp;
2024 goto out;
2025 }
2026
2027 /*
2028 * Note: This call does change file->f_pos, but nothing in NFSD
2029 * should ever file->f_pos.
2030 */
2031 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
2032 if (seek->seek_pos < 0)
2033 status = nfserrno(seek->seek_pos);
2034 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
2035 seek->seek_eof = true;
2036
2037 out:
2038 nfsd_file_put(nf);
2039 return status;
2040 }
2041
2042 /* This routine never returns NFS_OK! If there are no other errors, it
2043 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
2044 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
2045 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
2046 */
2047 static __be32
_nfsd4_verify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,struct nfsd4_verify * verify)2048 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2049 struct nfsd4_verify *verify)
2050 {
2051 __be32 *buf, *p;
2052 int count;
2053 __be32 status;
2054
2055 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
2056 if (status)
2057 return status;
2058
2059 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
2060 if (status)
2061 return status;
2062
2063 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
2064 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
2065 return nfserr_inval;
2066 if (verify->ve_attrlen & 3)
2067 return nfserr_inval;
2068
2069 /* count in words:
2070 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
2071 */
2072 count = 4 + (verify->ve_attrlen >> 2);
2073 buf = kmalloc(count << 2, GFP_KERNEL);
2074 if (!buf)
2075 return nfserr_jukebox;
2076
2077 p = buf;
2078 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
2079 cstate->current_fh.fh_export,
2080 cstate->current_fh.fh_dentry,
2081 verify->ve_bmval,
2082 rqstp, 0);
2083 /*
2084 * If nfsd4_encode_fattr() ran out of space, assume that's because
2085 * the attributes are longer (hence different) than those given:
2086 */
2087 if (status == nfserr_resource)
2088 status = nfserr_not_same;
2089 if (status)
2090 goto out_kfree;
2091
2092 /* skip bitmap */
2093 p = buf + 1 + ntohl(buf[0]);
2094 status = nfserr_not_same;
2095 if (ntohl(*p++) != verify->ve_attrlen)
2096 goto out_kfree;
2097 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
2098 status = nfserr_same;
2099
2100 out_kfree:
2101 kfree(buf);
2102 return status;
2103 }
2104
2105 static __be32
nfsd4_nverify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2106 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2107 union nfsd4_op_u *u)
2108 {
2109 __be32 status;
2110
2111 status = _nfsd4_verify(rqstp, cstate, &u->verify);
2112 return status == nfserr_not_same ? nfs_ok : status;
2113 }
2114
2115 static __be32
nfsd4_verify(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2116 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2117 union nfsd4_op_u *u)
2118 {
2119 __be32 status;
2120
2121 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
2122 return status == nfserr_same ? nfs_ok : status;
2123 }
2124
2125 #ifdef CONFIG_NFSD_PNFS
2126 static const struct nfsd4_layout_ops *
nfsd4_layout_verify(struct svc_export * exp,unsigned int layout_type)2127 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
2128 {
2129 if (!exp->ex_layout_types) {
2130 dprintk("%s: export does not support pNFS\n", __func__);
2131 return NULL;
2132 }
2133
2134 if (layout_type >= LAYOUT_TYPE_MAX ||
2135 !(exp->ex_layout_types & (1 << layout_type))) {
2136 dprintk("%s: layout type %d not supported\n",
2137 __func__, layout_type);
2138 return NULL;
2139 }
2140
2141 return nfsd4_layout_ops[layout_type];
2142 }
2143
2144 static __be32
nfsd4_getdeviceinfo(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2145 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
2146 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2147 {
2148 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
2149 const struct nfsd4_layout_ops *ops;
2150 struct nfsd4_deviceid_map *map;
2151 struct svc_export *exp;
2152 __be32 nfserr;
2153
2154 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
2155 __func__,
2156 gdp->gd_layout_type,
2157 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
2158 gdp->gd_maxcount);
2159
2160 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
2161 if (!map) {
2162 dprintk("%s: couldn't find device ID to export mapping!\n",
2163 __func__);
2164 return nfserr_noent;
2165 }
2166
2167 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
2168 if (IS_ERR(exp)) {
2169 dprintk("%s: could not find device id\n", __func__);
2170 return nfserr_noent;
2171 }
2172
2173 nfserr = nfserr_layoutunavailable;
2174 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
2175 if (!ops)
2176 goto out;
2177
2178 nfserr = nfs_ok;
2179 if (gdp->gd_maxcount != 0) {
2180 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
2181 rqstp, cstate->clp, gdp);
2182 }
2183
2184 gdp->gd_notify_types &= ops->notify_types;
2185 out:
2186 exp_put(exp);
2187 return nfserr;
2188 }
2189
2190 static void
nfsd4_getdeviceinfo_release(union nfsd4_op_u * u)2191 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
2192 {
2193 kfree(u->getdeviceinfo.gd_device);
2194 }
2195
2196 static __be32
nfsd4_layoutget(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2197 nfsd4_layoutget(struct svc_rqst *rqstp,
2198 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2199 {
2200 struct nfsd4_layoutget *lgp = &u->layoutget;
2201 struct svc_fh *current_fh = &cstate->current_fh;
2202 const struct nfsd4_layout_ops *ops;
2203 struct nfs4_layout_stateid *ls;
2204 __be32 nfserr;
2205 int accmode = NFSD_MAY_READ_IF_EXEC;
2206
2207 switch (lgp->lg_seg.iomode) {
2208 case IOMODE_READ:
2209 accmode |= NFSD_MAY_READ;
2210 break;
2211 case IOMODE_RW:
2212 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
2213 break;
2214 default:
2215 dprintk("%s: invalid iomode %d\n",
2216 __func__, lgp->lg_seg.iomode);
2217 nfserr = nfserr_badiomode;
2218 goto out;
2219 }
2220
2221 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
2222 if (nfserr)
2223 goto out;
2224
2225 nfserr = nfserr_layoutunavailable;
2226 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
2227 if (!ops)
2228 goto out;
2229
2230 /*
2231 * Verify minlength and range as per RFC5661:
2232 * o If loga_length is less than loga_minlength,
2233 * the metadata server MUST return NFS4ERR_INVAL.
2234 * o If the sum of loga_offset and loga_minlength exceeds
2235 * NFS4_UINT64_MAX, and loga_minlength is not
2236 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
2237 * o If the sum of loga_offset and loga_length exceeds
2238 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
2239 * the error NFS4ERR_INVAL MUST result.
2240 */
2241 nfserr = nfserr_inval;
2242 if (lgp->lg_seg.length < lgp->lg_minlength ||
2243 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
2244 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
2245 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
2246 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
2247 goto out;
2248 if (lgp->lg_seg.length == 0)
2249 goto out;
2250
2251 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
2252 true, lgp->lg_layout_type, &ls);
2253 if (nfserr) {
2254 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
2255 goto out;
2256 }
2257
2258 nfserr = nfserr_recallconflict;
2259 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
2260 goto out_put_stid;
2261
2262 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
2263 current_fh, lgp);
2264 if (nfserr)
2265 goto out_put_stid;
2266
2267 nfserr = nfsd4_insert_layout(lgp, ls);
2268
2269 out_put_stid:
2270 mutex_unlock(&ls->ls_mutex);
2271 nfs4_put_stid(&ls->ls_stid);
2272 out:
2273 return nfserr;
2274 }
2275
2276 static void
nfsd4_layoutget_release(union nfsd4_op_u * u)2277 nfsd4_layoutget_release(union nfsd4_op_u *u)
2278 {
2279 kfree(u->layoutget.lg_content);
2280 }
2281
2282 static __be32
nfsd4_layoutcommit(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2283 nfsd4_layoutcommit(struct svc_rqst *rqstp,
2284 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2285 {
2286 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
2287 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
2288 struct svc_fh *current_fh = &cstate->current_fh;
2289 const struct nfsd4_layout_ops *ops;
2290 loff_t new_size = lcp->lc_last_wr + 1;
2291 struct inode *inode;
2292 struct nfs4_layout_stateid *ls;
2293 __be32 nfserr;
2294
2295 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2296 if (nfserr)
2297 goto out;
2298
2299 nfserr = nfserr_layoutunavailable;
2300 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2301 if (!ops)
2302 goto out;
2303 inode = d_inode(current_fh->fh_dentry);
2304
2305 nfserr = nfserr_inval;
2306 if (new_size <= seg->offset) {
2307 dprintk("pnfsd: last write before layout segment\n");
2308 goto out;
2309 }
2310 if (new_size > seg->offset + seg->length) {
2311 dprintk("pnfsd: last write beyond layout segment\n");
2312 goto out;
2313 }
2314 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2315 dprintk("pnfsd: layoutcommit beyond EOF\n");
2316 goto out;
2317 }
2318
2319 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2320 false, lcp->lc_layout_type,
2321 &ls);
2322 if (nfserr) {
2323 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2324 /* fixup error code as per RFC5661 */
2325 if (nfserr == nfserr_bad_stateid)
2326 nfserr = nfserr_badlayout;
2327 goto out;
2328 }
2329
2330 /* LAYOUTCOMMIT does not require any serialization */
2331 mutex_unlock(&ls->ls_mutex);
2332
2333 if (new_size > i_size_read(inode)) {
2334 lcp->lc_size_chg = 1;
2335 lcp->lc_newsize = new_size;
2336 } else {
2337 lcp->lc_size_chg = 0;
2338 }
2339
2340 nfserr = ops->proc_layoutcommit(inode, lcp);
2341 nfs4_put_stid(&ls->ls_stid);
2342 out:
2343 return nfserr;
2344 }
2345
2346 static __be32
nfsd4_layoutreturn(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2347 nfsd4_layoutreturn(struct svc_rqst *rqstp,
2348 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2349 {
2350 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2351 struct svc_fh *current_fh = &cstate->current_fh;
2352 __be32 nfserr;
2353
2354 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2355 if (nfserr)
2356 goto out;
2357
2358 nfserr = nfserr_layoutunavailable;
2359 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2360 goto out;
2361
2362 switch (lrp->lr_seg.iomode) {
2363 case IOMODE_READ:
2364 case IOMODE_RW:
2365 case IOMODE_ANY:
2366 break;
2367 default:
2368 dprintk("%s: invalid iomode %d\n", __func__,
2369 lrp->lr_seg.iomode);
2370 nfserr = nfserr_inval;
2371 goto out;
2372 }
2373
2374 switch (lrp->lr_return_type) {
2375 case RETURN_FILE:
2376 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2377 break;
2378 case RETURN_FSID:
2379 case RETURN_ALL:
2380 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2381 break;
2382 default:
2383 dprintk("%s: invalid return_type %d\n", __func__,
2384 lrp->lr_return_type);
2385 nfserr = nfserr_inval;
2386 break;
2387 }
2388 out:
2389 return nfserr;
2390 }
2391 #endif /* CONFIG_NFSD_PNFS */
2392
2393 static __be32
nfsd4_getxattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2394 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2395 union nfsd4_op_u *u)
2396 {
2397 struct nfsd4_getxattr *getxattr = &u->getxattr;
2398
2399 return nfsd_getxattr(rqstp, &cstate->current_fh,
2400 getxattr->getxa_name, &getxattr->getxa_buf,
2401 &getxattr->getxa_len);
2402 }
2403
2404 static __be32
nfsd4_setxattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2405 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2406 union nfsd4_op_u *u)
2407 {
2408 struct nfsd4_setxattr *setxattr = &u->setxattr;
2409 __be32 ret;
2410
2411 if (opens_in_grace(SVC_NET(rqstp)))
2412 return nfserr_grace;
2413
2414 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2415 setxattr->setxa_buf, setxattr->setxa_len,
2416 setxattr->setxa_flags);
2417
2418 if (!ret)
2419 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2420
2421 return ret;
2422 }
2423
2424 static __be32
nfsd4_listxattrs(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2425 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2426 union nfsd4_op_u *u)
2427 {
2428 /*
2429 * Get the entire list, then copy out only the user attributes
2430 * in the encode function.
2431 */
2432 return nfsd_listxattr(rqstp, &cstate->current_fh,
2433 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2434 }
2435
2436 static __be32
nfsd4_removexattr(struct svc_rqst * rqstp,struct nfsd4_compound_state * cstate,union nfsd4_op_u * u)2437 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2438 union nfsd4_op_u *u)
2439 {
2440 struct nfsd4_removexattr *removexattr = &u->removexattr;
2441 __be32 ret;
2442
2443 if (opens_in_grace(SVC_NET(rqstp)))
2444 return nfserr_grace;
2445
2446 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2447 removexattr->rmxa_name);
2448
2449 if (!ret)
2450 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2451
2452 return ret;
2453 }
2454
2455 /*
2456 * NULL call.
2457 */
2458 static __be32
nfsd4_proc_null(struct svc_rqst * rqstp)2459 nfsd4_proc_null(struct svc_rqst *rqstp)
2460 {
2461 return rpc_success;
2462 }
2463
nfsd4_increment_op_stats(u32 opnum)2464 static inline void nfsd4_increment_op_stats(u32 opnum)
2465 {
2466 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2467 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
2468 }
2469
2470 static const struct nfsd4_operation nfsd4_ops[];
2471
2472 static const char *nfsd4_op_name(unsigned opnum);
2473
2474 /*
2475 * Enforce NFSv4.1 COMPOUND ordering rules:
2476 *
2477 * Also note, enforced elsewhere:
2478 * - SEQUENCE other than as first op results in
2479 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2480 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2481 * (Enforced in nfsd4_bind_conn_to_session().)
2482 * - DESTROY_SESSION must be the final operation in a compound, if
2483 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2484 * (Enforced in nfsd4_destroy_session().)
2485 */
nfs41_check_op_ordering(struct nfsd4_compoundargs * args)2486 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2487 {
2488 struct nfsd4_op *first_op = &args->ops[0];
2489
2490 /* These ordering requirements don't apply to NFSv4.0: */
2491 if (args->minorversion == 0)
2492 return nfs_ok;
2493 /* This is weird, but OK, not our problem: */
2494 if (args->opcnt == 0)
2495 return nfs_ok;
2496 if (first_op->status == nfserr_op_illegal)
2497 return nfs_ok;
2498 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2499 return nfserr_op_not_in_session;
2500 if (first_op->opnum == OP_SEQUENCE)
2501 return nfs_ok;
2502 /*
2503 * So first_op is something allowed outside a session, like
2504 * EXCHANGE_ID; but then it has to be the only op in the
2505 * compound:
2506 */
2507 if (args->opcnt != 1)
2508 return nfserr_not_only_op;
2509 return nfs_ok;
2510 }
2511
OPDESC(struct nfsd4_op * op)2512 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2513 {
2514 return &nfsd4_ops[op->opnum];
2515 }
2516
nfsd4_cache_this_op(struct nfsd4_op * op)2517 bool nfsd4_cache_this_op(struct nfsd4_op *op)
2518 {
2519 if (op->opnum == OP_ILLEGAL)
2520 return false;
2521 return OPDESC(op)->op_flags & OP_CACHEME;
2522 }
2523
need_wrongsec_check(struct svc_rqst * rqstp)2524 static bool need_wrongsec_check(struct svc_rqst *rqstp)
2525 {
2526 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2527 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2528 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2529 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2530 const struct nfsd4_operation *thisd = OPDESC(this);
2531 const struct nfsd4_operation *nextd;
2532
2533 /*
2534 * Most ops check wronsec on our own; only the putfh-like ops
2535 * have special rules.
2536 */
2537 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2538 return false;
2539 /*
2540 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2541 * put-filehandle operation if we're not going to use the
2542 * result:
2543 */
2544 if (argp->opcnt == resp->opcnt)
2545 return false;
2546 if (next->opnum == OP_ILLEGAL)
2547 return false;
2548 nextd = OPDESC(next);
2549 /*
2550 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2551 * errors themselves as necessary; others should check for them
2552 * now:
2553 */
2554 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2555 }
2556
2557 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
2558 static void
check_if_stalefh_allowed(struct nfsd4_compoundargs * args)2559 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2560 {
2561 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2562 struct nfsd4_copy *copy;
2563 struct nfsd4_putfh *putfh;
2564 int i;
2565
2566 /* traverse all operation and if it's a COPY compound, mark the
2567 * source filehandle to skip verification
2568 */
2569 for (i = 0; i < args->opcnt; i++) {
2570 op = &args->ops[i];
2571 if (op->opnum == OP_PUTFH)
2572 current_op = op;
2573 else if (op->opnum == OP_SAVEFH)
2574 saved_op = current_op;
2575 else if (op->opnum == OP_RESTOREFH)
2576 current_op = saved_op;
2577 else if (op->opnum == OP_COPY) {
2578 copy = (struct nfsd4_copy *)&op->u;
2579 if (!saved_op) {
2580 op->status = nfserr_nofilehandle;
2581 return;
2582 }
2583 putfh = (struct nfsd4_putfh *)&saved_op->u;
2584 if (nfsd4_ssc_is_inter(copy))
2585 putfh->no_verify = true;
2586 }
2587 }
2588 }
2589 #else
2590 static void
check_if_stalefh_allowed(struct nfsd4_compoundargs * args)2591 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2592 {
2593 }
2594 #endif
2595
2596 /*
2597 * COMPOUND call.
2598 */
2599 static __be32
nfsd4_proc_compound(struct svc_rqst * rqstp)2600 nfsd4_proc_compound(struct svc_rqst *rqstp)
2601 {
2602 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2603 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2604 struct nfsd4_op *op;
2605 struct nfsd4_compound_state *cstate = &resp->cstate;
2606 struct svc_fh *current_fh = &cstate->current_fh;
2607 struct svc_fh *save_fh = &cstate->save_fh;
2608 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2609 __be32 status;
2610
2611 resp->xdr = &rqstp->rq_res_stream;
2612 resp->statusp = resp->xdr->p;
2613
2614 /* reserve space for: NFS status code */
2615 xdr_reserve_space(resp->xdr, XDR_UNIT);
2616
2617 /* reserve space for: taglen, tag, and opcnt */
2618 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
2619 resp->taglen = args->taglen;
2620 resp->tag = args->tag;
2621 resp->rqstp = rqstp;
2622 cstate->minorversion = args->minorversion;
2623 fh_init(current_fh, NFS4_FHSIZE);
2624 fh_init(save_fh, NFS4_FHSIZE);
2625
2626 /*
2627 * Don't use the deferral mechanism for NFSv4; compounds make it
2628 * too hard to avoid non-idempotency problems.
2629 */
2630 __clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2631
2632 /*
2633 * According to RFC3010, this takes precedence over all other errors.
2634 */
2635 status = nfserr_minor_vers_mismatch;
2636 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2637 goto out;
2638
2639 status = nfs41_check_op_ordering(args);
2640 if (status) {
2641 op = &args->ops[0];
2642 op->status = status;
2643 resp->opcnt = 1;
2644 goto encode_op;
2645 }
2646 check_if_stalefh_allowed(args);
2647
2648 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2649
2650 trace_nfsd_compound(rqstp, args->tag, args->taglen, args->client_opcnt);
2651 while (!status && resp->opcnt < args->opcnt) {
2652 op = &args->ops[resp->opcnt++];
2653
2654 if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
2655 /* If there are still more operations to process,
2656 * stop here and report NFS4ERR_RESOURCE. */
2657 if (cstate->minorversion == 0 &&
2658 args->client_opcnt > resp->opcnt) {
2659 op->status = nfserr_resource;
2660 goto encode_op;
2661 }
2662 }
2663
2664 /*
2665 * The XDR decode routines may have pre-set op->status;
2666 * for example, if there is a miscellaneous XDR error
2667 * it will be set to nfserr_bad_xdr.
2668 */
2669 if (op->status) {
2670 if (op->opnum == OP_OPEN)
2671 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2672 goto encode_op;
2673 }
2674 if (!current_fh->fh_dentry &&
2675 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2676 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2677 op->status = nfserr_nofilehandle;
2678 goto encode_op;
2679 }
2680 } else if (current_fh->fh_export &&
2681 current_fh->fh_export->ex_fslocs.migrated &&
2682 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2683 op->status = nfserr_moved;
2684 goto encode_op;
2685 }
2686
2687 fh_clear_pre_post_attrs(current_fh);
2688
2689 /* If op is non-idempotent */
2690 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2691 /*
2692 * Don't execute this op if we couldn't encode a
2693 * successful reply:
2694 */
2695 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2696 /*
2697 * Plus if there's another operation, make sure
2698 * we'll have space to at least encode an error:
2699 */
2700 if (resp->opcnt < args->opcnt)
2701 plen += COMPOUND_ERR_SLACK_SPACE;
2702 op->status = nfsd4_check_resp_size(resp, plen);
2703 }
2704
2705 if (op->status)
2706 goto encode_op;
2707
2708 if (op->opdesc->op_get_currentstateid)
2709 op->opdesc->op_get_currentstateid(cstate, &op->u);
2710 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2711
2712 /* Only from SEQUENCE */
2713 if (cstate->status == nfserr_replay_cache) {
2714 dprintk("%s NFS4.1 replay from cache\n", __func__);
2715 status = op->status;
2716 goto out;
2717 }
2718 if (!op->status) {
2719 if (op->opdesc->op_set_currentstateid)
2720 op->opdesc->op_set_currentstateid(cstate, &op->u);
2721
2722 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2723 clear_current_stateid(cstate);
2724
2725 if (current_fh->fh_export &&
2726 need_wrongsec_check(rqstp))
2727 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2728 }
2729 encode_op:
2730 if (op->status == nfserr_replay_me) {
2731 op->replay = &cstate->replay_owner->so_replay;
2732 nfsd4_encode_replay(resp->xdr, op);
2733 status = op->status = op->replay->rp_status;
2734 } else {
2735 nfsd4_encode_operation(resp, op);
2736 status = op->status;
2737 }
2738
2739 trace_nfsd_compound_status(args->client_opcnt, resp->opcnt,
2740 status, nfsd4_op_name(op->opnum));
2741
2742 nfsd4_cstate_clear_replay(cstate);
2743 nfsd4_increment_op_stats(op->opnum);
2744 }
2745
2746 fh_put(current_fh);
2747 fh_put(save_fh);
2748 BUG_ON(cstate->replay_owner);
2749 out:
2750 cstate->status = status;
2751 /* Reset deferral mechanism for RPC deferrals */
2752 __set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2753 return rpc_success;
2754 }
2755
2756 #define op_encode_hdr_size (2)
2757 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2758 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2759 #define op_encode_change_info_maxsz (5)
2760 #define nfs4_fattr_bitmap_maxsz (4)
2761
2762 /* We'll fall back on returning no lockowner if run out of space: */
2763 #define op_encode_lockowner_maxsz (0)
2764 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2765
2766 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2767
2768 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2769 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2770 op_encode_ace_maxsz)
2771
2772 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2773
2774 /*
2775 * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which
2776 * is called before sunrpc sets rq_res.buflen. Thus we have to compute
2777 * the maximum payload size here, based on transport limits and the size
2778 * of the remaining space in the rq_pages array.
2779 */
nfsd4_max_payload(const struct svc_rqst * rqstp)2780 static u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
2781 {
2782 u32 buflen;
2783
2784 buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
2785 buflen -= rqstp->rq_auth_slack;
2786 buflen -= rqstp->rq_res.head[0].iov_len;
2787 return min_t(u32, buflen, svc_max_payload(rqstp));
2788 }
2789
nfsd4_only_status_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2790 static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
2791 const struct nfsd4_op *op)
2792 {
2793 return (op_encode_hdr_size) * sizeof(__be32);
2794 }
2795
nfsd4_status_stateid_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2796 static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
2797 const struct nfsd4_op *op)
2798 {
2799 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2800 }
2801
nfsd4_access_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2802 static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
2803 const struct nfsd4_op *op)
2804 {
2805 /* ac_supported, ac_resp_access */
2806 return (op_encode_hdr_size + 2)* sizeof(__be32);
2807 }
2808
nfsd4_commit_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2809 static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
2810 const struct nfsd4_op *op)
2811 {
2812 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2813 }
2814
nfsd4_create_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2815 static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
2816 const struct nfsd4_op *op)
2817 {
2818 return (op_encode_hdr_size + op_encode_change_info_maxsz
2819 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2820 }
2821
2822 /*
2823 * Note since this is an idempotent operation we won't insist on failing
2824 * the op prematurely if the estimate is too large. We may turn off splice
2825 * reads unnecessarily.
2826 */
nfsd4_getattr_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2827 static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
2828 const struct nfsd4_op *op)
2829 {
2830 const u32 *bmap = op->u.getattr.ga_bmval;
2831 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2832 u32 ret = 0;
2833
2834 if (bmap0 & FATTR4_WORD0_ACL)
2835 return nfsd4_max_payload(rqstp);
2836 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2837 return nfsd4_max_payload(rqstp);
2838
2839 if (bmap1 & FATTR4_WORD1_OWNER) {
2840 ret += IDMAP_NAMESZ + 4;
2841 bmap1 &= ~FATTR4_WORD1_OWNER;
2842 }
2843 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2844 ret += IDMAP_NAMESZ + 4;
2845 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2846 }
2847 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2848 ret += NFS4_FHSIZE + 4;
2849 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2850 }
2851 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2852 ret += NFS4_MAXLABELLEN + 12;
2853 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2854 }
2855 /*
2856 * Largest of remaining attributes are 16 bytes (e.g.,
2857 * supported_attributes)
2858 */
2859 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2860 /* bitmask, length */
2861 ret += 20;
2862 return ret;
2863 }
2864
nfsd4_getfh_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2865 static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
2866 const struct nfsd4_op *op)
2867 {
2868 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2869 }
2870
nfsd4_link_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2871 static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
2872 const struct nfsd4_op *op)
2873 {
2874 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2875 * sizeof(__be32);
2876 }
2877
nfsd4_lock_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2878 static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
2879 const struct nfsd4_op *op)
2880 {
2881 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2882 * sizeof(__be32);
2883 }
2884
nfsd4_open_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2885 static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
2886 const struct nfsd4_op *op)
2887 {
2888 return (op_encode_hdr_size + op_encode_stateid_maxsz
2889 + op_encode_change_info_maxsz + 1
2890 + nfs4_fattr_bitmap_maxsz
2891 + op_encode_delegation_maxsz) * sizeof(__be32);
2892 }
2893
nfsd4_read_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2894 static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
2895 const struct nfsd4_op *op)
2896 {
2897 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
2898
2899 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2900 }
2901
nfsd4_read_plus_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2902 static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
2903 const struct nfsd4_op *op)
2904 {
2905 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
2906 /*
2907 * If we detect that the file changed during hole encoding, then we
2908 * recover by encoding the remaining reply as data. This means we need
2909 * to set aside enough room to encode two data segments.
2910 */
2911 u32 seg_len = 2 * (1 + 2 + 1);
2912
2913 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2914 }
2915
nfsd4_readdir_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2916 static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
2917 const struct nfsd4_op *op)
2918 {
2919 u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
2920
2921 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2922 XDR_QUADLEN(rlen)) * sizeof(__be32);
2923 }
2924
nfsd4_readlink_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2925 static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
2926 const struct nfsd4_op *op)
2927 {
2928 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2929 }
2930
nfsd4_remove_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2931 static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
2932 const struct nfsd4_op *op)
2933 {
2934 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2935 * sizeof(__be32);
2936 }
2937
nfsd4_rename_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2938 static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
2939 const struct nfsd4_op *op)
2940 {
2941 return (op_encode_hdr_size + op_encode_change_info_maxsz
2942 + op_encode_change_info_maxsz) * sizeof(__be32);
2943 }
2944
nfsd4_sequence_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2945 static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
2946 const struct nfsd4_op *op)
2947 {
2948 return (op_encode_hdr_size
2949 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2950 }
2951
nfsd4_test_stateid_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2952 static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
2953 const struct nfsd4_op *op)
2954 {
2955 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2956 * sizeof(__be32);
2957 }
2958
nfsd4_setattr_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2959 static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
2960 const struct nfsd4_op *op)
2961 {
2962 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2963 }
2964
nfsd4_secinfo_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2965 static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
2966 const struct nfsd4_op *op)
2967 {
2968 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2969 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2970 }
2971
nfsd4_setclientid_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2972 static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
2973 const struct nfsd4_op *op)
2974 {
2975 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2976 sizeof(__be32);
2977 }
2978
nfsd4_write_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2979 static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
2980 const struct nfsd4_op *op)
2981 {
2982 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2983 }
2984
nfsd4_exchange_id_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)2985 static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
2986 const struct nfsd4_op *op)
2987 {
2988 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2989 1 + 1 + /* eir_flags, spr_how */\
2990 4 + /* spo_must_enforce & _allow with bitmap */\
2991 2 + /*eir_server_owner.so_minor_id */\
2992 /* eir_server_owner.so_major_id<> */\
2993 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2994 /* eir_server_scope<> */\
2995 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2996 1 + /* eir_server_impl_id array length */\
2997 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2998 }
2999
nfsd4_bind_conn_to_session_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3000 static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
3001 const struct nfsd4_op *op)
3002 {
3003 return (op_encode_hdr_size + \
3004 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
3005 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
3006 }
3007
nfsd4_create_session_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3008 static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
3009 const struct nfsd4_op *op)
3010 {
3011 return (op_encode_hdr_size + \
3012 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
3013 2 + /* csr_sequence, csr_flags */\
3014 op_encode_channel_attrs_maxsz + \
3015 op_encode_channel_attrs_maxsz) * sizeof(__be32);
3016 }
3017
nfsd4_copy_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3018 static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
3019 const struct nfsd4_op *op)
3020 {
3021 return (op_encode_hdr_size +
3022 1 /* wr_callback */ +
3023 op_encode_stateid_maxsz /* wr_callback */ +
3024 2 /* wr_count */ +
3025 1 /* wr_committed */ +
3026 op_encode_verifier_maxsz +
3027 1 /* cr_consecutive */ +
3028 1 /* cr_synchronous */) * sizeof(__be32);
3029 }
3030
nfsd4_offload_status_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3031 static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
3032 const struct nfsd4_op *op)
3033 {
3034 return (op_encode_hdr_size +
3035 2 /* osr_count */ +
3036 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
3037 }
3038
nfsd4_copy_notify_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3039 static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
3040 const struct nfsd4_op *op)
3041 {
3042 return (op_encode_hdr_size +
3043 3 /* cnr_lease_time */ +
3044 1 /* We support one cnr_source_server */ +
3045 1 /* cnr_stateid seq */ +
3046 op_encode_stateid_maxsz /* cnr_stateid */ +
3047 1 /* num cnr_source_server*/ +
3048 1 /* nl4_type */ +
3049 1 /* nl4 size */ +
3050 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
3051 * sizeof(__be32);
3052 }
3053
3054 #ifdef CONFIG_NFSD_PNFS
nfsd4_getdeviceinfo_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3055 static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
3056 const struct nfsd4_op *op)
3057 {
3058 u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
3059
3060 return (op_encode_hdr_size +
3061 1 /* gd_layout_type*/ +
3062 XDR_QUADLEN(rlen) +
3063 2 /* gd_notify_types */) * sizeof(__be32);
3064 }
3065
3066 /*
3067 * At this stage we don't really know what layout driver will handle the request,
3068 * so we need to define an arbitrary upper bound here.
3069 */
3070 #define MAX_LAYOUT_SIZE 128
nfsd4_layoutget_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3071 static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
3072 const struct nfsd4_op *op)
3073 {
3074 return (op_encode_hdr_size +
3075 1 /* logr_return_on_close */ +
3076 op_encode_stateid_maxsz +
3077 1 /* nr of layouts */ +
3078 MAX_LAYOUT_SIZE) * sizeof(__be32);
3079 }
3080
nfsd4_layoutcommit_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3081 static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
3082 const struct nfsd4_op *op)
3083 {
3084 return (op_encode_hdr_size +
3085 1 /* locr_newsize */ +
3086 2 /* ns_size */) * sizeof(__be32);
3087 }
3088
nfsd4_layoutreturn_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3089 static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
3090 const struct nfsd4_op *op)
3091 {
3092 return (op_encode_hdr_size +
3093 1 /* lrs_stateid */ +
3094 op_encode_stateid_maxsz) * sizeof(__be32);
3095 }
3096 #endif /* CONFIG_NFSD_PNFS */
3097
3098
nfsd4_seek_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3099 static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
3100 const struct nfsd4_op *op)
3101 {
3102 return (op_encode_hdr_size + 3) * sizeof(__be32);
3103 }
3104
nfsd4_getxattr_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3105 static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
3106 const struct nfsd4_op *op)
3107 {
3108 u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
3109
3110 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
3111 }
3112
nfsd4_setxattr_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3113 static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
3114 const struct nfsd4_op *op)
3115 {
3116 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3117 * sizeof(__be32);
3118 }
nfsd4_listxattrs_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3119 static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
3120 const struct nfsd4_op *op)
3121 {
3122 u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
3123
3124 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
3125 }
3126
nfsd4_removexattr_rsize(const struct svc_rqst * rqstp,const struct nfsd4_op * op)3127 static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
3128 const struct nfsd4_op *op)
3129 {
3130 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3131 * sizeof(__be32);
3132 }
3133
3134
3135 static const struct nfsd4_operation nfsd4_ops[] = {
3136 [OP_ACCESS] = {
3137 .op_func = nfsd4_access,
3138 .op_name = "OP_ACCESS",
3139 .op_rsize_bop = nfsd4_access_rsize,
3140 },
3141 [OP_CLOSE] = {
3142 .op_func = nfsd4_close,
3143 .op_flags = OP_MODIFIES_SOMETHING,
3144 .op_name = "OP_CLOSE",
3145 .op_rsize_bop = nfsd4_status_stateid_rsize,
3146 .op_get_currentstateid = nfsd4_get_closestateid,
3147 .op_set_currentstateid = nfsd4_set_closestateid,
3148 },
3149 [OP_COMMIT] = {
3150 .op_func = nfsd4_commit,
3151 .op_flags = OP_MODIFIES_SOMETHING,
3152 .op_name = "OP_COMMIT",
3153 .op_rsize_bop = nfsd4_commit_rsize,
3154 },
3155 [OP_CREATE] = {
3156 .op_func = nfsd4_create,
3157 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
3158 .op_name = "OP_CREATE",
3159 .op_rsize_bop = nfsd4_create_rsize,
3160 },
3161 [OP_DELEGRETURN] = {
3162 .op_func = nfsd4_delegreturn,
3163 .op_flags = OP_MODIFIES_SOMETHING,
3164 .op_name = "OP_DELEGRETURN",
3165 .op_rsize_bop = nfsd4_only_status_rsize,
3166 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
3167 },
3168 [OP_GETATTR] = {
3169 .op_func = nfsd4_getattr,
3170 .op_flags = ALLOWED_ON_ABSENT_FS,
3171 .op_rsize_bop = nfsd4_getattr_rsize,
3172 .op_name = "OP_GETATTR",
3173 },
3174 [OP_GETFH] = {
3175 .op_func = nfsd4_getfh,
3176 .op_name = "OP_GETFH",
3177 .op_rsize_bop = nfsd4_getfh_rsize,
3178 },
3179 [OP_LINK] = {
3180 .op_func = nfsd4_link,
3181 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
3182 | OP_CACHEME,
3183 .op_name = "OP_LINK",
3184 .op_rsize_bop = nfsd4_link_rsize,
3185 },
3186 [OP_LOCK] = {
3187 .op_func = nfsd4_lock,
3188 .op_flags = OP_MODIFIES_SOMETHING |
3189 OP_NONTRIVIAL_ERROR_ENCODE,
3190 .op_name = "OP_LOCK",
3191 .op_rsize_bop = nfsd4_lock_rsize,
3192 .op_set_currentstateid = nfsd4_set_lockstateid,
3193 },
3194 [OP_LOCKT] = {
3195 .op_func = nfsd4_lockt,
3196 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
3197 .op_name = "OP_LOCKT",
3198 .op_rsize_bop = nfsd4_lock_rsize,
3199 },
3200 [OP_LOCKU] = {
3201 .op_func = nfsd4_locku,
3202 .op_flags = OP_MODIFIES_SOMETHING,
3203 .op_name = "OP_LOCKU",
3204 .op_rsize_bop = nfsd4_status_stateid_rsize,
3205 .op_get_currentstateid = nfsd4_get_lockustateid,
3206 },
3207 [OP_LOOKUP] = {
3208 .op_func = nfsd4_lookup,
3209 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3210 .op_name = "OP_LOOKUP",
3211 .op_rsize_bop = nfsd4_only_status_rsize,
3212 },
3213 [OP_LOOKUPP] = {
3214 .op_func = nfsd4_lookupp,
3215 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3216 .op_name = "OP_LOOKUPP",
3217 .op_rsize_bop = nfsd4_only_status_rsize,
3218 },
3219 [OP_NVERIFY] = {
3220 .op_func = nfsd4_nverify,
3221 .op_name = "OP_NVERIFY",
3222 .op_rsize_bop = nfsd4_only_status_rsize,
3223 },
3224 [OP_OPEN] = {
3225 .op_func = nfsd4_open,
3226 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3227 .op_name = "OP_OPEN",
3228 .op_rsize_bop = nfsd4_open_rsize,
3229 .op_set_currentstateid = nfsd4_set_openstateid,
3230 },
3231 [OP_OPEN_CONFIRM] = {
3232 .op_func = nfsd4_open_confirm,
3233 .op_flags = OP_MODIFIES_SOMETHING,
3234 .op_name = "OP_OPEN_CONFIRM",
3235 .op_rsize_bop = nfsd4_status_stateid_rsize,
3236 },
3237 [OP_OPEN_DOWNGRADE] = {
3238 .op_func = nfsd4_open_downgrade,
3239 .op_flags = OP_MODIFIES_SOMETHING,
3240 .op_name = "OP_OPEN_DOWNGRADE",
3241 .op_rsize_bop = nfsd4_status_stateid_rsize,
3242 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
3243 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
3244 },
3245 [OP_PUTFH] = {
3246 .op_func = nfsd4_putfh,
3247 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3248 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3249 .op_name = "OP_PUTFH",
3250 .op_rsize_bop = nfsd4_only_status_rsize,
3251 },
3252 [OP_PUTPUBFH] = {
3253 .op_func = nfsd4_putrootfh,
3254 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3255 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3256 .op_name = "OP_PUTPUBFH",
3257 .op_rsize_bop = nfsd4_only_status_rsize,
3258 },
3259 [OP_PUTROOTFH] = {
3260 .op_func = nfsd4_putrootfh,
3261 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3262 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3263 .op_name = "OP_PUTROOTFH",
3264 .op_rsize_bop = nfsd4_only_status_rsize,
3265 },
3266 [OP_READ] = {
3267 .op_func = nfsd4_read,
3268 .op_release = nfsd4_read_release,
3269 .op_name = "OP_READ",
3270 .op_rsize_bop = nfsd4_read_rsize,
3271 .op_get_currentstateid = nfsd4_get_readstateid,
3272 },
3273 [OP_READDIR] = {
3274 .op_func = nfsd4_readdir,
3275 .op_name = "OP_READDIR",
3276 .op_rsize_bop = nfsd4_readdir_rsize,
3277 },
3278 [OP_READLINK] = {
3279 .op_func = nfsd4_readlink,
3280 .op_name = "OP_READLINK",
3281 .op_rsize_bop = nfsd4_readlink_rsize,
3282 },
3283 [OP_REMOVE] = {
3284 .op_func = nfsd4_remove,
3285 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3286 .op_name = "OP_REMOVE",
3287 .op_rsize_bop = nfsd4_remove_rsize,
3288 },
3289 [OP_RENAME] = {
3290 .op_func = nfsd4_rename,
3291 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3292 .op_name = "OP_RENAME",
3293 .op_rsize_bop = nfsd4_rename_rsize,
3294 },
3295 [OP_RENEW] = {
3296 .op_func = nfsd4_renew,
3297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3298 | OP_MODIFIES_SOMETHING,
3299 .op_name = "OP_RENEW",
3300 .op_rsize_bop = nfsd4_only_status_rsize,
3301
3302 },
3303 [OP_RESTOREFH] = {
3304 .op_func = nfsd4_restorefh,
3305 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3306 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
3307 .op_name = "OP_RESTOREFH",
3308 .op_rsize_bop = nfsd4_only_status_rsize,
3309 },
3310 [OP_SAVEFH] = {
3311 .op_func = nfsd4_savefh,
3312 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3313 .op_name = "OP_SAVEFH",
3314 .op_rsize_bop = nfsd4_only_status_rsize,
3315 },
3316 [OP_SECINFO] = {
3317 .op_func = nfsd4_secinfo,
3318 .op_release = nfsd4_secinfo_release,
3319 .op_flags = OP_HANDLES_WRONGSEC,
3320 .op_name = "OP_SECINFO",
3321 .op_rsize_bop = nfsd4_secinfo_rsize,
3322 },
3323 [OP_SETATTR] = {
3324 .op_func = nfsd4_setattr,
3325 .op_name = "OP_SETATTR",
3326 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3327 | OP_NONTRIVIAL_ERROR_ENCODE,
3328 .op_rsize_bop = nfsd4_setattr_rsize,
3329 .op_get_currentstateid = nfsd4_get_setattrstateid,
3330 },
3331 [OP_SETCLIENTID] = {
3332 .op_func = nfsd4_setclientid,
3333 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3334 | OP_MODIFIES_SOMETHING | OP_CACHEME
3335 | OP_NONTRIVIAL_ERROR_ENCODE,
3336 .op_name = "OP_SETCLIENTID",
3337 .op_rsize_bop = nfsd4_setclientid_rsize,
3338 },
3339 [OP_SETCLIENTID_CONFIRM] = {
3340 .op_func = nfsd4_setclientid_confirm,
3341 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3342 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3343 .op_name = "OP_SETCLIENTID_CONFIRM",
3344 .op_rsize_bop = nfsd4_only_status_rsize,
3345 },
3346 [OP_VERIFY] = {
3347 .op_func = nfsd4_verify,
3348 .op_name = "OP_VERIFY",
3349 .op_rsize_bop = nfsd4_only_status_rsize,
3350 },
3351 [OP_WRITE] = {
3352 .op_func = nfsd4_write,
3353 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3354 .op_name = "OP_WRITE",
3355 .op_rsize_bop = nfsd4_write_rsize,
3356 .op_get_currentstateid = nfsd4_get_writestateid,
3357 },
3358 [OP_RELEASE_LOCKOWNER] = {
3359 .op_func = nfsd4_release_lockowner,
3360 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3361 | OP_MODIFIES_SOMETHING,
3362 .op_name = "OP_RELEASE_LOCKOWNER",
3363 .op_rsize_bop = nfsd4_only_status_rsize,
3364 },
3365
3366 /* NFSv4.1 operations */
3367 [OP_EXCHANGE_ID] = {
3368 .op_func = nfsd4_exchange_id,
3369 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3370 | OP_MODIFIES_SOMETHING,
3371 .op_name = "OP_EXCHANGE_ID",
3372 .op_rsize_bop = nfsd4_exchange_id_rsize,
3373 },
3374 [OP_BACKCHANNEL_CTL] = {
3375 .op_func = nfsd4_backchannel_ctl,
3376 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3377 .op_name = "OP_BACKCHANNEL_CTL",
3378 .op_rsize_bop = nfsd4_only_status_rsize,
3379 },
3380 [OP_BIND_CONN_TO_SESSION] = {
3381 .op_func = nfsd4_bind_conn_to_session,
3382 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3383 | OP_MODIFIES_SOMETHING,
3384 .op_name = "OP_BIND_CONN_TO_SESSION",
3385 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3386 },
3387 [OP_CREATE_SESSION] = {
3388 .op_func = nfsd4_create_session,
3389 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3390 | OP_MODIFIES_SOMETHING,
3391 .op_name = "OP_CREATE_SESSION",
3392 .op_rsize_bop = nfsd4_create_session_rsize,
3393 },
3394 [OP_DESTROY_SESSION] = {
3395 .op_func = nfsd4_destroy_session,
3396 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3397 | OP_MODIFIES_SOMETHING,
3398 .op_name = "OP_DESTROY_SESSION",
3399 .op_rsize_bop = nfsd4_only_status_rsize,
3400 },
3401 [OP_SEQUENCE] = {
3402 .op_func = nfsd4_sequence,
3403 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3404 .op_name = "OP_SEQUENCE",
3405 .op_rsize_bop = nfsd4_sequence_rsize,
3406 },
3407 [OP_DESTROY_CLIENTID] = {
3408 .op_func = nfsd4_destroy_clientid,
3409 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3410 | OP_MODIFIES_SOMETHING,
3411 .op_name = "OP_DESTROY_CLIENTID",
3412 .op_rsize_bop = nfsd4_only_status_rsize,
3413 },
3414 [OP_RECLAIM_COMPLETE] = {
3415 .op_func = nfsd4_reclaim_complete,
3416 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3417 .op_name = "OP_RECLAIM_COMPLETE",
3418 .op_rsize_bop = nfsd4_only_status_rsize,
3419 },
3420 [OP_SECINFO_NO_NAME] = {
3421 .op_func = nfsd4_secinfo_no_name,
3422 .op_release = nfsd4_secinfo_no_name_release,
3423 .op_flags = OP_HANDLES_WRONGSEC,
3424 .op_name = "OP_SECINFO_NO_NAME",
3425 .op_rsize_bop = nfsd4_secinfo_rsize,
3426 },
3427 [OP_TEST_STATEID] = {
3428 .op_func = nfsd4_test_stateid,
3429 .op_flags = ALLOWED_WITHOUT_FH,
3430 .op_name = "OP_TEST_STATEID",
3431 .op_rsize_bop = nfsd4_test_stateid_rsize,
3432 },
3433 [OP_FREE_STATEID] = {
3434 .op_func = nfsd4_free_stateid,
3435 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3436 .op_name = "OP_FREE_STATEID",
3437 .op_get_currentstateid = nfsd4_get_freestateid,
3438 .op_rsize_bop = nfsd4_only_status_rsize,
3439 },
3440 #ifdef CONFIG_NFSD_PNFS
3441 [OP_GETDEVICEINFO] = {
3442 .op_func = nfsd4_getdeviceinfo,
3443 .op_release = nfsd4_getdeviceinfo_release,
3444 .op_flags = ALLOWED_WITHOUT_FH,
3445 .op_name = "OP_GETDEVICEINFO",
3446 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3447 },
3448 [OP_LAYOUTGET] = {
3449 .op_func = nfsd4_layoutget,
3450 .op_release = nfsd4_layoutget_release,
3451 .op_flags = OP_MODIFIES_SOMETHING,
3452 .op_name = "OP_LAYOUTGET",
3453 .op_rsize_bop = nfsd4_layoutget_rsize,
3454 },
3455 [OP_LAYOUTCOMMIT] = {
3456 .op_func = nfsd4_layoutcommit,
3457 .op_flags = OP_MODIFIES_SOMETHING,
3458 .op_name = "OP_LAYOUTCOMMIT",
3459 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3460 },
3461 [OP_LAYOUTRETURN] = {
3462 .op_func = nfsd4_layoutreturn,
3463 .op_flags = OP_MODIFIES_SOMETHING,
3464 .op_name = "OP_LAYOUTRETURN",
3465 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3466 },
3467 #endif /* CONFIG_NFSD_PNFS */
3468
3469 /* NFSv4.2 operations */
3470 [OP_ALLOCATE] = {
3471 .op_func = nfsd4_allocate,
3472 .op_flags = OP_MODIFIES_SOMETHING,
3473 .op_name = "OP_ALLOCATE",
3474 .op_rsize_bop = nfsd4_only_status_rsize,
3475 },
3476 [OP_DEALLOCATE] = {
3477 .op_func = nfsd4_deallocate,
3478 .op_flags = OP_MODIFIES_SOMETHING,
3479 .op_name = "OP_DEALLOCATE",
3480 .op_rsize_bop = nfsd4_only_status_rsize,
3481 },
3482 [OP_CLONE] = {
3483 .op_func = nfsd4_clone,
3484 .op_flags = OP_MODIFIES_SOMETHING,
3485 .op_name = "OP_CLONE",
3486 .op_rsize_bop = nfsd4_only_status_rsize,
3487 },
3488 [OP_COPY] = {
3489 .op_func = nfsd4_copy,
3490 .op_flags = OP_MODIFIES_SOMETHING,
3491 .op_name = "OP_COPY",
3492 .op_rsize_bop = nfsd4_copy_rsize,
3493 },
3494 [OP_READ_PLUS] = {
3495 .op_func = nfsd4_read,
3496 .op_release = nfsd4_read_release,
3497 .op_name = "OP_READ_PLUS",
3498 .op_rsize_bop = nfsd4_read_plus_rsize,
3499 .op_get_currentstateid = nfsd4_get_readstateid,
3500 },
3501 [OP_SEEK] = {
3502 .op_func = nfsd4_seek,
3503 .op_name = "OP_SEEK",
3504 .op_rsize_bop = nfsd4_seek_rsize,
3505 },
3506 [OP_OFFLOAD_STATUS] = {
3507 .op_func = nfsd4_offload_status,
3508 .op_name = "OP_OFFLOAD_STATUS",
3509 .op_rsize_bop = nfsd4_offload_status_rsize,
3510 },
3511 [OP_OFFLOAD_CANCEL] = {
3512 .op_func = nfsd4_offload_cancel,
3513 .op_flags = OP_MODIFIES_SOMETHING,
3514 .op_name = "OP_OFFLOAD_CANCEL",
3515 .op_rsize_bop = nfsd4_only_status_rsize,
3516 },
3517 [OP_COPY_NOTIFY] = {
3518 .op_func = nfsd4_copy_notify,
3519 .op_flags = OP_MODIFIES_SOMETHING,
3520 .op_name = "OP_COPY_NOTIFY",
3521 .op_rsize_bop = nfsd4_copy_notify_rsize,
3522 },
3523 [OP_GETXATTR] = {
3524 .op_func = nfsd4_getxattr,
3525 .op_name = "OP_GETXATTR",
3526 .op_rsize_bop = nfsd4_getxattr_rsize,
3527 },
3528 [OP_SETXATTR] = {
3529 .op_func = nfsd4_setxattr,
3530 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3531 .op_name = "OP_SETXATTR",
3532 .op_rsize_bop = nfsd4_setxattr_rsize,
3533 },
3534 [OP_LISTXATTRS] = {
3535 .op_func = nfsd4_listxattrs,
3536 .op_name = "OP_LISTXATTRS",
3537 .op_rsize_bop = nfsd4_listxattrs_rsize,
3538 },
3539 [OP_REMOVEXATTR] = {
3540 .op_func = nfsd4_removexattr,
3541 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3542 .op_name = "OP_REMOVEXATTR",
3543 .op_rsize_bop = nfsd4_removexattr_rsize,
3544 },
3545 };
3546
3547 /**
3548 * nfsd4_spo_must_allow - Determine if the compound op contains an
3549 * operation that is allowed to be sent with machine credentials
3550 *
3551 * @rqstp: a pointer to the struct svc_rqst
3552 *
3553 * Checks to see if the compound contains a spo_must_allow op
3554 * and confirms that it was sent with the proper machine creds.
3555 */
3556
nfsd4_spo_must_allow(struct svc_rqst * rqstp)3557 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3558 {
3559 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3560 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3561 struct nfsd4_op *this;
3562 struct nfsd4_compound_state *cstate = &resp->cstate;
3563 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3564 u32 opiter;
3565
3566 if (!cstate->minorversion)
3567 return false;
3568
3569 if (cstate->spo_must_allowed)
3570 return true;
3571
3572 opiter = resp->opcnt;
3573 while (opiter < argp->opcnt) {
3574 this = &argp->ops[opiter++];
3575 if (test_bit(this->opnum, allow->u.longs) &&
3576 cstate->clp->cl_mach_cred &&
3577 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3578 cstate->spo_must_allowed = true;
3579 return true;
3580 }
3581 }
3582 cstate->spo_must_allowed = false;
3583 return false;
3584 }
3585
nfsd4_max_reply(struct svc_rqst * rqstp,struct nfsd4_op * op)3586 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3587 {
3588 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3589 return op_encode_hdr_size * sizeof(__be32);
3590
3591 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3592 return OPDESC(op)->op_rsize_bop(rqstp, op);
3593 }
3594
warn_on_nonidempotent_op(struct nfsd4_op * op)3595 void warn_on_nonidempotent_op(struct nfsd4_op *op)
3596 {
3597 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3598 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
3599 op->opnum, nfsd4_op_name(op->opnum));
3600 WARN_ON_ONCE(1);
3601 }
3602 }
3603
nfsd4_op_name(unsigned opnum)3604 static const char *nfsd4_op_name(unsigned opnum)
3605 {
3606 if (opnum < ARRAY_SIZE(nfsd4_ops))
3607 return nfsd4_ops[opnum].op_name;
3608 return "unknown_operation";
3609 }
3610
3611 static const struct svc_procedure nfsd_procedures4[2] = {
3612 [NFSPROC4_NULL] = {
3613 .pc_func = nfsd4_proc_null,
3614 .pc_decode = nfssvc_decode_voidarg,
3615 .pc_encode = nfssvc_encode_voidres,
3616 .pc_argsize = sizeof(struct nfsd_voidargs),
3617 .pc_argzero = sizeof(struct nfsd_voidargs),
3618 .pc_ressize = sizeof(struct nfsd_voidres),
3619 .pc_cachetype = RC_NOCACHE,
3620 .pc_xdrressize = 1,
3621 .pc_name = "NULL",
3622 },
3623 [NFSPROC4_COMPOUND] = {
3624 .pc_func = nfsd4_proc_compound,
3625 .pc_decode = nfs4svc_decode_compoundargs,
3626 .pc_encode = nfs4svc_encode_compoundres,
3627 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3628 .pc_argzero = offsetof(struct nfsd4_compoundargs, iops),
3629 .pc_ressize = sizeof(struct nfsd4_compoundres),
3630 .pc_release = nfsd4_release_compoundargs,
3631 .pc_cachetype = RC_NOCACHE,
3632 .pc_xdrressize = NFSD_BUFSIZE/4,
3633 .pc_name = "COMPOUND",
3634 },
3635 };
3636
3637 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3638 const struct svc_version nfsd_version4 = {
3639 .vs_vers = 4,
3640 .vs_nproc = 2,
3641 .vs_proc = nfsd_procedures4,
3642 .vs_count = nfsd_count3,
3643 .vs_dispatch = nfsd_dispatch,
3644 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3645 .vs_rpcb_optnl = true,
3646 .vs_need_cong_ctrl = true,
3647 };
3648