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
55static bool inter_copy_offload_enable;
56module_param(inter_copy_offload_enable, bool, 0644);
57MODULE_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
61static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
62module_param(nfsd4_ssc_umount_timeout, int, 0644);
63MODULE_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
69static u32 nfsd_attrmask[] = {
70 NFSD_WRITEABLE_ATTRS_WORD0,
71 NFSD_WRITEABLE_ATTRS_WORD1,
72 NFSD_WRITEABLE_ATTRS_WORD2
73};
74
75static u32 nfsd41_ex_attrmask[] = {
76 NFSD_SUPPATTR_EXCLCREAT_WORD0,
77 NFSD_SUPPATTR_EXCLCREAT_WORD1,
78 NFSD_SUPPATTR_EXCLCREAT_WORD2
79};
80
81static __be32
82check_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(minorversion: 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(bm1: bmval, bm2: 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
103static __be32
104nfsd4_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 bmval: open->op_bmval, writable: nfsd_attrmask);
114 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
115 status = check_attr_support(rqstp, cstate,
116 bmval: open->op_bmval, writable: nfsd41_ex_attrmask);
117 }
118
119 return status;
120}
121
122static int
123is_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
131static inline void
132fh_dup2(struct svc_fh *dst, struct svc_fh *src)
133{
134 fh_put(dst);
135 dget(dentry: src->fh_dentry);
136 if (src->fh_export)
137 exp_get(exp: src->fh_export);
138 *dst = *src;
139}
140
141static __be32
142do_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
161static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
162{
163 umode_t mode = d_inode(dentry: 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
179static 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(cs: cstate))
182 return;
183 fh_copy_shallow(dst: &open->op_openowner->oo_owner.so_replay.rp_openfh,
184 src: &resfh->fh_handle);
185}
186
187static inline bool nfsd4_create_is_exclusive(int createmode)
188{
189 return createmode == NFS4_CREATE_EXCLUSIVE ||
190 createmode == NFS4_CREATE_EXCLUSIVE4_1;
191}
192
193static __be32
194nfsd4_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: &path, flags: oflags, mode: open->op_iattr.ia_mode,
216 current_cred());
217 if (IS_ERR(ptr: filp))
218 return nfserrno(errno: PTR_ERR(ptr: 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 */
231static __be32
232nfsd4_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(dentry: parent);
256
257 host_err = fh_want_write(fh: fhp);
258 if (host_err)
259 return nfserrno(errno: host_err);
260
261 if (is_create_with_attrs(open))
262 nfsd4_acl_to_attr(type: NF4REG, acl: open->op_acl, attr: &attrs);
263
264 inode_lock_nested(inode, subclass: I_MUTEX_PARENT);
265
266 child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
267 if (IS_ERR(ptr: child)) {
268 status = nfserrno(errno: PTR_ERR(ptr: child));
269 goto out;
270 }
271
272 if (d_really_is_negative(dentry: 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(createmode: 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(dentry: child)) {
300 /* NFSv4 protocol requires change attributes even though
301 * no change happened.
302 */
303 status = fh_fill_both_attrs(fhp);
304 if (status != nfs_ok)
305 goto out;
306
307 switch (open->op_createmode) {
308 case NFS4_CREATE_UNCHECKED:
309 if (!d_is_reg(dentry: 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 (inode_get_mtime_sec(inode: d_inode(dentry: child)) == v_mtime &&
326 inode_get_atime_sec(inode: d_inode(dentry: child)) == v_atime &&
327 d_inode(dentry: 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 (inode_get_mtime_sec(inode: d_inode(dentry: child)) == v_mtime &&
335 inode_get_atime_sec(inode: d_inode(dentry: child)) == v_atime &&
336 d_inode(dentry: 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 status = fh_fill_pre_attrs(fhp);
349 if (status != nfs_ok)
350 goto out;
351 status = nfsd4_vfs_create(fhp, child, open);
352 if (status != nfs_ok)
353 goto out;
354 open->op_created = true;
355 fh_fill_post_attrs(fhp);
356
357 /* A newly created file already has a file size of zero. */
358 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
359 iap->ia_valid &= ~ATTR_SIZE;
360 if (nfsd4_create_is_exclusive(createmode: open->op_createmode)) {
361 iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
362 ATTR_MTIME_SET|ATTR_ATIME_SET;
363 iap->ia_mtime.tv_sec = v_mtime;
364 iap->ia_atime.tv_sec = v_atime;
365 iap->ia_mtime.tv_nsec = 0;
366 iap->ia_atime.tv_nsec = 0;
367 }
368
369set_attr:
370 status = nfsd_create_setattr(rqstp, fhp, resfhp, iap: &attrs);
371
372 if (attrs.na_labelerr)
373 open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
374 if (attrs.na_aclerr)
375 open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
376out:
377 inode_unlock(inode);
378 nfsd_attrs_free(attrs: &attrs);
379 if (child && !IS_ERR(ptr: child))
380 dput(child);
381 fh_drop_write(fh: fhp);
382 return status;
383}
384
385/**
386 * set_change_info - set up the change_info4 for a reply
387 * @cinfo: pointer to nfsd4_change_info to be populated
388 * @fhp: pointer to svc_fh to use as source
389 *
390 * Many operations in NFSv4 require change_info4 in the reply. This function
391 * populates that from the info that we (should!) have already collected. In
392 * the event that we didn't get any pre-attrs, just zero out both.
393 */
394static void
395set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
396{
397 cinfo->atomic = (u32)(fhp->fh_pre_saved && fhp->fh_post_saved && !fhp->fh_no_atomic_attr);
398 cinfo->before_change = fhp->fh_pre_change;
399 cinfo->after_change = fhp->fh_post_change;
400
401 /*
402 * If fetching the pre-change attributes failed, then we should
403 * have already failed the whole operation. We could have still
404 * failed to fetch post-change attributes however.
405 *
406 * If we didn't get post-op attrs, just zero-out the after
407 * field since we don't know what it should be. If the pre_saved
408 * field isn't set for some reason, throw warning and just copy
409 * whatever is in the after field.
410 */
411 if (WARN_ON_ONCE(!fhp->fh_pre_saved))
412 cinfo->before_change = 0;
413 if (!fhp->fh_post_saved)
414 cinfo->after_change = cinfo->before_change + 1;
415}
416
417static __be32
418do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
419{
420 struct svc_fh *current_fh = &cstate->current_fh;
421 int accmode;
422 __be32 status;
423
424 *resfh = kmalloc(size: sizeof(struct svc_fh), GFP_KERNEL);
425 if (!*resfh)
426 return nfserr_jukebox;
427 fh_init(fhp: *resfh, NFS4_FHSIZE);
428 open->op_truncate = false;
429
430 if (open->op_create) {
431 /* FIXME: check session persistence and pnfs flags.
432 * The nfsv4.1 spec requires the following semantics:
433 *
434 * Persistent | pNFS | Server REQUIRED | Client Allowed
435 * Reply Cache | server | |
436 * -------------+--------+-----------------+--------------------
437 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
438 * | | | (SHOULD)
439 * | | and EXCLUSIVE4 | or EXCLUSIVE4
440 * | | | (SHOULD NOT)
441 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
442 * yes | no | GUARDED4 | GUARDED4
443 * yes | yes | GUARDED4 | GUARDED4
444 */
445
446 current->fs->umask = open->op_umask;
447 status = nfsd4_create_file(rqstp, fhp: current_fh, resfhp: *resfh, open);
448 current->fs->umask = 0;
449
450 /*
451 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
452 * use the returned bitmask to indicate which attributes
453 * we used to store the verifier:
454 */
455 if (nfsd4_create_is_exclusive(createmode: open->op_createmode) && status == 0)
456 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
457 FATTR4_WORD1_TIME_MODIFY);
458 } else {
459 status = nfsd_lookup(rqstp, current_fh,
460 open->op_fname, open->op_fnamelen, *resfh);
461 if (status == nfs_ok)
462 /* NFSv4 protocol requires change attributes even though
463 * no change happened.
464 */
465 status = fh_fill_both_attrs(fhp: current_fh);
466 }
467 if (status)
468 goto out;
469 status = nfsd_check_obj_isreg(fh: *resfh);
470 if (status)
471 goto out;
472
473 nfsd4_set_open_owner_reply_cache(cstate, open, resfh: *resfh);
474 accmode = NFSD_MAY_NOP;
475 if (open->op_created ||
476 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
477 accmode |= NFSD_MAY_OWNER_OVERRIDE;
478 status = do_open_permission(rqstp, current_fh: *resfh, open, accmode);
479 set_change_info(cinfo: &open->op_cinfo, fhp: current_fh);
480out:
481 return status;
482}
483
484static __be32
485do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
486{
487 struct svc_fh *current_fh = &cstate->current_fh;
488 int accmode = 0;
489
490 /* We don't know the target directory, and therefore can not
491 * set the change info
492 */
493
494 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
495
496 nfsd4_set_open_owner_reply_cache(cstate, open, resfh: current_fh);
497
498 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
499 (open->op_iattr.ia_size == 0);
500 /*
501 * In the delegation case, the client is telling us about an
502 * open that it *already* performed locally, some time ago. We
503 * should let it succeed now if possible.
504 *
505 * In the case of a CLAIM_FH open, on the other hand, the client
506 * may be counting on us to enforce permissions (the Linux 4.1
507 * client uses this for normal opens, for example).
508 */
509 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
510 accmode = NFSD_MAY_OWNER_OVERRIDE;
511
512 return do_open_permission(rqstp, current_fh, open, accmode);
513}
514
515static void
516copy_clientid(clientid_t *clid, struct nfsd4_session *session)
517{
518 struct nfsd4_sessionid *sid =
519 (struct nfsd4_sessionid *)session->se_sessionid.data;
520
521 clid->cl_boot = sid->clientid.cl_boot;
522 clid->cl_id = sid->clientid.cl_id;
523}
524
525static __be32
526nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
527 union nfsd4_op_u *u)
528{
529 struct nfsd4_open *open = &u->open;
530 __be32 status;
531 struct svc_fh *resfh = NULL;
532 struct net *net = SVC_NET(rqstp);
533 struct nfsd_net *nn = net_generic(net, id: nfsd_net_id);
534 bool reclaim = false;
535
536 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
537 (int)open->op_fnamelen, open->op_fname,
538 open->op_openowner);
539
540 open->op_filp = NULL;
541 open->op_rqstp = rqstp;
542
543 /* This check required by spec. */
544 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
545 return nfserr_inval;
546
547 open->op_created = false;
548 /*
549 * RFC5661 18.51.3
550 * Before RECLAIM_COMPLETE done, server should deny new lock
551 */
552 if (nfsd4_has_session(cs: cstate) &&
553 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
554 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
555 return nfserr_grace;
556
557 if (nfsd4_has_session(cs: cstate))
558 copy_clientid(clid: &open->op_clientid, session: cstate->session);
559
560 /* check seqid for replay. set nfs4_owner */
561 status = nfsd4_process_open1(cstate, open, nn);
562 if (status == nfserr_replay_me) {
563 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
564 fh_put(&cstate->current_fh);
565 fh_copy_shallow(dst: &cstate->current_fh.fh_handle,
566 src: &rp->rp_openfh);
567 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
568 if (status)
569 dprintk("nfsd4_open: replay failed"
570 " restoring previous filehandle\n");
571 else
572 status = nfserr_replay_me;
573 }
574 if (status)
575 goto out;
576 if (open->op_xdr_error) {
577 status = open->op_xdr_error;
578 goto out;
579 }
580
581 status = nfsd4_check_open_attributes(rqstp, cstate, open);
582 if (status)
583 goto out;
584
585 /* Openowner is now set, so sequence id will get bumped. Now we need
586 * these checks before we do any creates: */
587 status = nfserr_grace;
588 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
589 goto out;
590 status = nfserr_no_grace;
591 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
592 goto out;
593
594 switch (open->op_claim_type) {
595 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
596 case NFS4_OPEN_CLAIM_NULL:
597 status = do_open_lookup(rqstp, cstate, open, resfh: &resfh);
598 if (status)
599 goto out;
600 break;
601 case NFS4_OPEN_CLAIM_PREVIOUS:
602 status = nfs4_check_open_reclaim(cstate->clp);
603 if (status)
604 goto out;
605 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
606 reclaim = true;
607 fallthrough;
608 case NFS4_OPEN_CLAIM_FH:
609 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
610 status = do_open_fhandle(rqstp, cstate, open);
611 if (status)
612 goto out;
613 resfh = &cstate->current_fh;
614 break;
615 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
616 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
617 status = nfserr_notsupp;
618 goto out;
619 default:
620 status = nfserr_inval;
621 goto out;
622 }
623
624 status = nfsd4_process_open2(rqstp, current_fh: resfh, open);
625 if (status && open->op_created)
626 pr_warn("nfsd4_process_open2 failed to open newly-created file: status=%u\n",
627 be32_to_cpu(status));
628 if (reclaim && !status)
629 nn->somebody_reclaimed = true;
630out:
631 if (open->op_filp) {
632 fput(open->op_filp);
633 open->op_filp = NULL;
634 }
635 if (resfh && resfh != &cstate->current_fh) {
636 fh_dup2(dst: &cstate->current_fh, src: resfh);
637 fh_put(resfh);
638 kfree(objp: resfh);
639 }
640 nfsd4_cleanup_open_state(cstate, open);
641 nfsd4_bump_seqid(cstate, nfserr: status);
642 return status;
643}
644
645/*
646 * OPEN is the only seqid-mutating operation whose decoding can fail
647 * with a seqid-mutating error (specifically, decoding of user names in
648 * the attributes). Therefore we have to do some processing to look up
649 * the stateowner so that we can bump the seqid.
650 */
651static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
652{
653 struct nfsd4_open *open = &op->u.open;
654
655 if (!seqid_mutating_err(ntohl(op->status)))
656 return op->status;
657 if (nfsd4_has_session(cs: cstate))
658 return op->status;
659 open->op_xdr_error = op->status;
660 return nfsd4_open(rqstp, cstate, u: &op->u);
661}
662
663/*
664 * filehandle-manipulating ops.
665 */
666static __be32
667nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
668 union nfsd4_op_u *u)
669{
670 u->getfh = &cstate->current_fh;
671 return nfs_ok;
672}
673
674static __be32
675nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
676 union nfsd4_op_u *u)
677{
678 struct nfsd4_putfh *putfh = &u->putfh;
679 __be32 ret;
680
681 fh_put(&cstate->current_fh);
682 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
683 memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval,
684 putfh->pf_fhlen);
685 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
686#ifdef CONFIG_NFSD_V4_2_INTER_SSC
687 if (ret == nfserr_stale && putfh->no_verify) {
688 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
689 ret = 0;
690 }
691#endif
692 return ret;
693}
694
695static __be32
696nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
697 union nfsd4_op_u *u)
698{
699 fh_put(&cstate->current_fh);
700
701 return exp_pseudoroot(rqstp, &cstate->current_fh);
702}
703
704static __be32
705nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
706 union nfsd4_op_u *u)
707{
708 if (!cstate->save_fh.fh_dentry)
709 return nfserr_restorefh;
710
711 fh_dup2(dst: &cstate->current_fh, src: &cstate->save_fh);
712 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
713 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
714 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
715 }
716 return nfs_ok;
717}
718
719static __be32
720nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
721 union nfsd4_op_u *u)
722{
723 fh_dup2(dst: &cstate->save_fh, src: &cstate->current_fh);
724 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
725 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
726 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
727 }
728 return nfs_ok;
729}
730
731/*
732 * misc nfsv4 ops
733 */
734static __be32
735nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
736 union nfsd4_op_u *u)
737{
738 struct nfsd4_access *access = &u->access;
739 u32 access_full;
740
741 access_full = NFS3_ACCESS_FULL;
742 if (cstate->minorversion >= 2)
743 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
744 NFS4_ACCESS_XAWRITE;
745
746 if (access->ac_req_access & ~access_full)
747 return nfserr_inval;
748
749 access->ac_resp_access = access->ac_req_access;
750 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
751 &access->ac_supported);
752}
753
754static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
755{
756 __be32 *verf = (__be32 *)verifier->data;
757
758 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
759
760 nfsd_copy_write_verifier(verf, nn: net_generic(net, id: nfsd_net_id));
761}
762
763static __be32
764nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
765 union nfsd4_op_u *u)
766{
767 struct nfsd4_commit *commit = &u->commit;
768 struct nfsd_file *nf;
769 __be32 status;
770
771 status = nfsd_file_acquire(rqstp, fhp: &cstate->current_fh, NFSD_MAY_WRITE |
772 NFSD_MAY_NOT_BREAK_LEASE, nfp: &nf);
773 if (status != nfs_ok)
774 return status;
775
776 status = nfsd_commit(rqst: rqstp, fhp: &cstate->current_fh, nf, offset: commit->co_offset,
777 count: commit->co_count,
778 verf: (__be32 *)commit->co_verf.data);
779 nfsd_file_put(nf);
780 return status;
781}
782
783static __be32
784nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
785 union nfsd4_op_u *u)
786{
787 struct nfsd4_create *create = &u->create;
788 struct nfsd_attrs attrs = {
789 .na_iattr = &create->cr_iattr,
790 .na_seclabel = &create->cr_label,
791 };
792 struct svc_fh resfh;
793 __be32 status;
794 dev_t rdev;
795
796 fh_init(fhp: &resfh, NFS4_FHSIZE);
797
798 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
799 if (status)
800 return status;
801
802 status = check_attr_support(rqstp, cstate, bmval: create->cr_bmval,
803 writable: nfsd_attrmask);
804 if (status)
805 return status;
806
807 status = nfsd4_acl_to_attr(type: create->cr_type, acl: create->cr_acl, attr: &attrs);
808 current->fs->umask = create->cr_umask;
809 switch (create->cr_type) {
810 case NF4LNK:
811 status = nfsd_symlink(rqstp, &cstate->current_fh,
812 name: create->cr_name, len: create->cr_namelen,
813 path: create->cr_data, attrs: &attrs, res: &resfh);
814 break;
815
816 case NF4BLK:
817 status = nfserr_inval;
818 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
819 if (MAJOR(rdev) != create->cr_specdata1 ||
820 MINOR(rdev) != create->cr_specdata2)
821 goto out_umask;
822 status = nfsd_create(rqstp, &cstate->current_fh,
823 name: create->cr_name, len: create->cr_namelen,
824 attrs: &attrs, S_IFBLK, rdev, res: &resfh);
825 break;
826
827 case NF4CHR:
828 status = nfserr_inval;
829 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
830 if (MAJOR(rdev) != create->cr_specdata1 ||
831 MINOR(rdev) != create->cr_specdata2)
832 goto out_umask;
833 status = nfsd_create(rqstp, &cstate->current_fh,
834 name: create->cr_name, len: create->cr_namelen,
835 attrs: &attrs, S_IFCHR, rdev, res: &resfh);
836 break;
837
838 case NF4SOCK:
839 status = nfsd_create(rqstp, &cstate->current_fh,
840 name: create->cr_name, len: create->cr_namelen,
841 attrs: &attrs, S_IFSOCK, rdev: 0, res: &resfh);
842 break;
843
844 case NF4FIFO:
845 status = nfsd_create(rqstp, &cstate->current_fh,
846 name: create->cr_name, len: create->cr_namelen,
847 attrs: &attrs, S_IFIFO, rdev: 0, res: &resfh);
848 break;
849
850 case NF4DIR:
851 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
852 status = nfsd_create(rqstp, &cstate->current_fh,
853 name: create->cr_name, len: create->cr_namelen,
854 attrs: &attrs, S_IFDIR, rdev: 0, res: &resfh);
855 break;
856
857 default:
858 status = nfserr_badtype;
859 }
860
861 if (status)
862 goto out;
863
864 if (attrs.na_labelerr)
865 create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
866 if (attrs.na_aclerr)
867 create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
868 set_change_info(cinfo: &create->cr_cinfo, fhp: &cstate->current_fh);
869 fh_dup2(dst: &cstate->current_fh, src: &resfh);
870out:
871 fh_put(&resfh);
872out_umask:
873 current->fs->umask = 0;
874 nfsd_attrs_free(attrs: &attrs);
875 return status;
876}
877
878static __be32
879nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
880 union nfsd4_op_u *u)
881{
882 struct nfsd4_getattr *getattr = &u->getattr;
883 __be32 status;
884
885 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
886 if (status)
887 return status;
888
889 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
890 return nfserr_inval;
891
892 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
893 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
894 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
895
896 getattr->ga_fhp = &cstate->current_fh;
897 return nfs_ok;
898}
899
900static __be32
901nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
902 union nfsd4_op_u *u)
903{
904 struct nfsd4_link *link = &u->link;
905 __be32 status;
906
907 status = nfsd_link(rqstp, &cstate->current_fh,
908 link->li_name, link->li_namelen, &cstate->save_fh);
909 if (!status)
910 set_change_info(cinfo: &link->li_cinfo, fhp: &cstate->current_fh);
911 return status;
912}
913
914static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
915{
916 struct svc_fh tmp_fh;
917 __be32 ret;
918
919 fh_init(fhp: &tmp_fh, NFS4_FHSIZE);
920 ret = exp_pseudoroot(rqstp, &tmp_fh);
921 if (ret)
922 return ret;
923 if (tmp_fh.fh_dentry == fh->fh_dentry) {
924 fh_put(&tmp_fh);
925 return nfserr_noent;
926 }
927 fh_put(&tmp_fh);
928 return nfsd_lookup(rqstp, fh, "..", 2, fh);
929}
930
931static __be32
932nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
933 union nfsd4_op_u *u)
934{
935 return nfsd4_do_lookupp(rqstp, fh: &cstate->current_fh);
936}
937
938static __be32
939nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
940 union nfsd4_op_u *u)
941{
942 return nfsd_lookup(rqstp, &cstate->current_fh,
943 u->lookup.lo_name, u->lookup.lo_len,
944 &cstate->current_fh);
945}
946
947static __be32
948nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
949 union nfsd4_op_u *u)
950{
951 struct nfsd4_read *read = &u->read;
952 __be32 status;
953
954 read->rd_nf = NULL;
955
956 trace_nfsd_read_start(rqstp, fhp: &cstate->current_fh,
957 offset: read->rd_offset, len: read->rd_length);
958
959 read->rd_length = min_t(u32, read->rd_length, svc_max_payload(rqstp));
960 if (read->rd_offset > (u64)OFFSET_MAX)
961 read->rd_offset = (u64)OFFSET_MAX;
962 if (read->rd_offset + read->rd_length > (u64)OFFSET_MAX)
963 read->rd_length = (u64)OFFSET_MAX - read->rd_offset;
964
965 /*
966 * If we do a zero copy read, then a client will see read data
967 * that reflects the state of the file *after* performing the
968 * following compound.
969 *
970 * To ensure proper ordering, we therefore turn off zero copy if
971 * the client wants us to do more in this compound:
972 */
973 if (!nfsd4_last_compound_op(rqstp))
974 clear_bit(nr: RQ_SPLICE_OK, addr: &rqstp->rq_flags);
975
976 /* check stateid */
977 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
978 stateid: &read->rd_stateid, RD_STATE,
979 filp: &read->rd_nf, NULL);
980
981 read->rd_rqstp = rqstp;
982 read->rd_fhp = &cstate->current_fh;
983 return status;
984}
985
986
987static void
988nfsd4_read_release(union nfsd4_op_u *u)
989{
990 if (u->read.rd_nf)
991 nfsd_file_put(nf: u->read.rd_nf);
992 trace_nfsd_read_done(rqstp: u->read.rd_rqstp, fhp: u->read.rd_fhp,
993 offset: u->read.rd_offset, len: u->read.rd_length);
994}
995
996static __be32
997nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
998 union nfsd4_op_u *u)
999{
1000 struct nfsd4_readdir *readdir = &u->readdir;
1001 u64 cookie = readdir->rd_cookie;
1002 static const nfs4_verifier zeroverf;
1003
1004 /* no need to check permission - this will be done in nfsd_readdir() */
1005
1006 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
1007 return nfserr_inval;
1008
1009 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
1010 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
1011 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1012
1013 if ((cookie == 1) || (cookie == 2) ||
1014 (cookie == 0 && memcmp(p: readdir->rd_verf.data, q: zeroverf.data, NFS4_VERIFIER_SIZE)))
1015 return nfserr_bad_cookie;
1016
1017 readdir->rd_rqstp = rqstp;
1018 readdir->rd_fhp = &cstate->current_fh;
1019 return nfs_ok;
1020}
1021
1022static __be32
1023nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1024 union nfsd4_op_u *u)
1025{
1026 u->readlink.rl_rqstp = rqstp;
1027 u->readlink.rl_fhp = &cstate->current_fh;
1028 return nfs_ok;
1029}
1030
1031static __be32
1032nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1033 union nfsd4_op_u *u)
1034{
1035 struct nfsd4_remove *remove = &u->remove;
1036 __be32 status;
1037
1038 if (opens_in_grace(SVC_NET(rqstp)))
1039 return nfserr_grace;
1040 status = nfsd_unlink(rqstp, &cstate->current_fh, type: 0,
1041 name: remove->rm_name, len: remove->rm_namelen);
1042 if (!status)
1043 set_change_info(cinfo: &remove->rm_cinfo, fhp: &cstate->current_fh);
1044 return status;
1045}
1046
1047static __be32
1048nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1049 union nfsd4_op_u *u)
1050{
1051 struct nfsd4_rename *rename = &u->rename;
1052 __be32 status;
1053
1054 if (opens_in_grace(SVC_NET(rqstp)))
1055 return nfserr_grace;
1056 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
1057 rename->rn_snamelen, &cstate->current_fh,
1058 rename->rn_tname, rename->rn_tnamelen);
1059 if (status)
1060 return status;
1061 set_change_info(cinfo: &rename->rn_sinfo, fhp: &cstate->save_fh);
1062 set_change_info(cinfo: &rename->rn_tinfo, fhp: &cstate->current_fh);
1063 return nfs_ok;
1064}
1065
1066static __be32
1067nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1068 union nfsd4_op_u *u)
1069{
1070 struct nfsd4_secinfo *secinfo = &u->secinfo;
1071 struct svc_export *exp;
1072 struct dentry *dentry;
1073 __be32 err;
1074
1075 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
1076 if (err)
1077 return err;
1078 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
1079 secinfo->si_name, secinfo->si_namelen,
1080 &exp, &dentry);
1081 if (err)
1082 return err;
1083 if (d_really_is_negative(dentry)) {
1084 exp_put(exp);
1085 err = nfserr_noent;
1086 } else
1087 secinfo->si_exp = exp;
1088 dput(dentry);
1089 if (cstate->minorversion)
1090 /* See rfc 5661 section 2.6.3.1.1.8 */
1091 fh_put(&cstate->current_fh);
1092 return err;
1093}
1094
1095static __be32
1096nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1097 union nfsd4_op_u *u)
1098{
1099 __be32 err;
1100
1101 switch (u->secinfo_no_name.sin_style) {
1102 case NFS4_SECINFO_STYLE4_CURRENT_FH:
1103 break;
1104 case NFS4_SECINFO_STYLE4_PARENT:
1105 err = nfsd4_do_lookupp(rqstp, fh: &cstate->current_fh);
1106 if (err)
1107 return err;
1108 break;
1109 default:
1110 return nfserr_inval;
1111 }
1112
1113 u->secinfo_no_name.sin_exp = exp_get(exp: cstate->current_fh.fh_export);
1114 fh_put(&cstate->current_fh);
1115 return nfs_ok;
1116}
1117
1118static void
1119nfsd4_secinfo_release(union nfsd4_op_u *u)
1120{
1121 if (u->secinfo.si_exp)
1122 exp_put(exp: u->secinfo.si_exp);
1123}
1124
1125static void
1126nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
1127{
1128 if (u->secinfo_no_name.sin_exp)
1129 exp_put(exp: u->secinfo_no_name.sin_exp);
1130}
1131
1132static __be32
1133nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1134 union nfsd4_op_u *u)
1135{
1136 struct nfsd4_setattr *setattr = &u->setattr;
1137 struct nfsd_attrs attrs = {
1138 .na_iattr = &setattr->sa_iattr,
1139 .na_seclabel = &setattr->sa_label,
1140 };
1141 struct inode *inode;
1142 __be32 status = nfs_ok;
1143 int err;
1144
1145 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
1146 status = nfs4_preprocess_stateid_op(rqstp, cstate,
1147 fhp: &cstate->current_fh, stateid: &setattr->sa_stateid,
1148 WR_STATE, NULL, NULL);
1149 if (status)
1150 return status;
1151 }
1152 err = fh_want_write(fh: &cstate->current_fh);
1153 if (err)
1154 return nfserrno(errno: err);
1155 status = nfs_ok;
1156
1157 status = check_attr_support(rqstp, cstate, bmval: setattr->sa_bmval,
1158 writable: nfsd_attrmask);
1159 if (status)
1160 goto out;
1161
1162 inode = cstate->current_fh.fh_dentry->d_inode;
1163 status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
1164 acl: setattr->sa_acl, attr: &attrs);
1165
1166 if (status)
1167 goto out;
1168 status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
1169 0, (time64_t)0);
1170 if (!status)
1171 status = nfserrno(errno: attrs.na_labelerr);
1172 if (!status)
1173 status = nfserrno(errno: attrs.na_aclerr);
1174out:
1175 nfsd_attrs_free(attrs: &attrs);
1176 fh_drop_write(fh: &cstate->current_fh);
1177 return status;
1178}
1179
1180static __be32
1181nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1182 union nfsd4_op_u *u)
1183{
1184 struct nfsd4_write *write = &u->write;
1185 stateid_t *stateid = &write->wr_stateid;
1186 struct nfsd_file *nf = NULL;
1187 __be32 status = nfs_ok;
1188 unsigned long cnt;
1189 int nvecs;
1190
1191 if (write->wr_offset > (u64)OFFSET_MAX ||
1192 write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
1193 return nfserr_fbig;
1194
1195 cnt = write->wr_buflen;
1196 trace_nfsd_write_start(rqstp, fhp: &cstate->current_fh,
1197 offset: write->wr_offset, len: cnt);
1198 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
1199 stateid, WR_STATE, filp: &nf, NULL);
1200 if (status)
1201 return status;
1202
1203 write->wr_how_written = write->wr_stable_how;
1204
1205 nvecs = svc_fill_write_vector(rqstp, payload: &write->wr_payload);
1206 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1207
1208 status = nfsd_vfs_write(rqstp, fhp: &cstate->current_fh, nf,
1209 offset: write->wr_offset, vec: rqstp->rq_vec, vlen: nvecs, cnt: &cnt,
1210 stable: write->wr_how_written,
1211 verf: (__be32 *)write->wr_verifier.data);
1212 nfsd_file_put(nf);
1213
1214 write->wr_bytes_written = cnt;
1215 trace_nfsd_write_done(rqstp, fhp: &cstate->current_fh,
1216 offset: write->wr_offset, len: cnt);
1217 return status;
1218}
1219
1220static __be32
1221nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1222 stateid_t *src_stateid, struct nfsd_file **src,
1223 stateid_t *dst_stateid, struct nfsd_file **dst)
1224{
1225 __be32 status;
1226
1227 if (!cstate->save_fh.fh_dentry)
1228 return nfserr_nofilehandle;
1229
1230 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->save_fh,
1231 stateid: src_stateid, RD_STATE, filp: src, NULL);
1232 if (status)
1233 goto out;
1234
1235 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
1236 stateid: dst_stateid, WR_STATE, filp: dst, NULL);
1237 if (status)
1238 goto out_put_src;
1239
1240 /* fix up for NFS-specific error code */
1241 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1242 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1243 status = nfserr_wrong_type;
1244 goto out_put_dst;
1245 }
1246
1247out:
1248 return status;
1249out_put_dst:
1250 nfsd_file_put(nf: *dst);
1251 *dst = NULL;
1252out_put_src:
1253 nfsd_file_put(nf: *src);
1254 *src = NULL;
1255 goto out;
1256}
1257
1258static __be32
1259nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1260 union nfsd4_op_u *u)
1261{
1262 struct nfsd4_clone *clone = &u->clone;
1263 struct nfsd_file *src, *dst;
1264 __be32 status;
1265
1266 status = nfsd4_verify_copy(rqstp, cstate, src_stateid: &clone->cl_src_stateid, src: &src,
1267 dst_stateid: &clone->cl_dst_stateid, dst: &dst);
1268 if (status)
1269 goto out;
1270
1271 status = nfsd4_clone_file_range(rqstp, nf_src: src, src_pos: clone->cl_src_pos,
1272 nf_dst: dst, dst_pos: clone->cl_dst_pos, count: clone->cl_count,
1273 EX_ISSYNC(cstate->current_fh.fh_export));
1274
1275 nfsd_file_put(nf: dst);
1276 nfsd_file_put(nf: src);
1277out:
1278 return status;
1279}
1280
1281static void nfs4_put_copy(struct nfsd4_copy *copy)
1282{
1283 if (!refcount_dec_and_test(r: &copy->refcount))
1284 return;
1285 kfree(objp: copy->cp_src);
1286 kfree(objp: copy);
1287}
1288
1289static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1290{
1291 if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, addr: &copy->cp_flags))
1292 kthread_stop(k: copy->copy_task);
1293 nfs4_put_copy(copy);
1294}
1295
1296static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1297{
1298 struct nfsd4_copy *copy = NULL;
1299
1300 spin_lock(lock: &clp->async_lock);
1301 if (!list_empty(head: &clp->async_copies)) {
1302 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1303 copies);
1304 refcount_inc(r: &copy->refcount);
1305 }
1306 spin_unlock(lock: &clp->async_lock);
1307 return copy;
1308}
1309
1310void nfsd4_shutdown_copy(struct nfs4_client *clp)
1311{
1312 struct nfsd4_copy *copy;
1313
1314 while ((copy = nfsd4_get_copy(clp)) != NULL)
1315 nfsd4_stop_copy(copy);
1316}
1317#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1318
1319extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1320 struct nfs_fh *src_fh,
1321 nfs4_stateid *stateid);
1322extern void nfs42_ssc_close(struct file *filep);
1323
1324extern void nfs_sb_deactive(struct super_block *sb);
1325
1326#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1327
1328/*
1329 * setup a work entry in the ssc delayed unmount list.
1330 */
1331static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
1332 struct nfsd4_ssc_umount_item **nsui,
1333 struct svc_rqst *rqstp)
1334{
1335 struct nfsd4_ssc_umount_item *ni = NULL;
1336 struct nfsd4_ssc_umount_item *work = NULL;
1337 struct nfsd4_ssc_umount_item *tmp;
1338 DEFINE_WAIT(wait);
1339 __be32 status = 0;
1340
1341 *nsui = NULL;
1342 work = kzalloc(size: sizeof(*work), GFP_KERNEL);
1343try_again:
1344 spin_lock(lock: &nn->nfsd_ssc_lock);
1345 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1346 if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
1347 continue;
1348 /* found a match */
1349 if (ni->nsui_busy) {
1350 /* wait - and try again */
1351 prepare_to_wait(wq_head: &nn->nfsd_ssc_waitq, wq_entry: &wait, TASK_IDLE);
1352 spin_unlock(lock: &nn->nfsd_ssc_lock);
1353
1354 /* allow 20secs for mount/unmount for now - revisit */
1355 if (svc_thread_should_stop(rqstp) ||
1356 (schedule_timeout(timeout: 20*HZ) == 0)) {
1357 finish_wait(wq_head: &nn->nfsd_ssc_waitq, wq_entry: &wait);
1358 kfree(objp: work);
1359 return nfserr_eagain;
1360 }
1361 finish_wait(wq_head: &nn->nfsd_ssc_waitq, wq_entry: &wait);
1362 goto try_again;
1363 }
1364 *nsui = ni;
1365 refcount_inc(r: &ni->nsui_refcnt);
1366 spin_unlock(lock: &nn->nfsd_ssc_lock);
1367 kfree(objp: work);
1368
1369 /* return vfsmount in (*nsui)->nsui_vfsmount */
1370 return 0;
1371 }
1372 if (work) {
1373 strscpy(p: work->nsui_ipaddr, q: ipaddr, size: sizeof(work->nsui_ipaddr) - 1);
1374 refcount_set(r: &work->nsui_refcnt, n: 2);
1375 work->nsui_busy = true;
1376 list_add_tail(new: &work->nsui_list, head: &nn->nfsd_ssc_mount_list);
1377 *nsui = work;
1378 } else
1379 status = nfserr_resource;
1380 spin_unlock(lock: &nn->nfsd_ssc_lock);
1381 return status;
1382}
1383
1384static void nfsd4_ssc_update_dul(struct nfsd_net *nn,
1385 struct nfsd4_ssc_umount_item *nsui,
1386 struct vfsmount *ss_mnt)
1387{
1388 spin_lock(lock: &nn->nfsd_ssc_lock);
1389 nsui->nsui_vfsmount = ss_mnt;
1390 nsui->nsui_busy = false;
1391 wake_up_all(&nn->nfsd_ssc_waitq);
1392 spin_unlock(lock: &nn->nfsd_ssc_lock);
1393}
1394
1395static void nfsd4_ssc_cancel_dul(struct nfsd_net *nn,
1396 struct nfsd4_ssc_umount_item *nsui)
1397{
1398 spin_lock(lock: &nn->nfsd_ssc_lock);
1399 list_del(entry: &nsui->nsui_list);
1400 wake_up_all(&nn->nfsd_ssc_waitq);
1401 spin_unlock(lock: &nn->nfsd_ssc_lock);
1402 kfree(objp: nsui);
1403}
1404
1405/*
1406 * Support one copy source server for now.
1407 */
1408static __be32
1409nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1410 struct nfsd4_ssc_umount_item **nsui)
1411{
1412 struct file_system_type *type;
1413 struct vfsmount *ss_mnt;
1414 struct nfs42_netaddr *naddr;
1415 struct sockaddr_storage tmp_addr;
1416 size_t tmp_addrlen, match_netid_len = 3;
1417 char *startsep = "", *endsep = "", *match_netid = "tcp";
1418 char *ipaddr, *dev_name, *raw_data;
1419 int len, raw_len;
1420 __be32 status = nfserr_inval;
1421 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), id: nfsd_net_id);
1422
1423 naddr = &nss->u.nl4_addr;
1424 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1425 naddr->addr_len,
1426 (struct sockaddr *)&tmp_addr,
1427 sizeof(tmp_addr));
1428 *nsui = NULL;
1429 if (tmp_addrlen == 0)
1430 goto out_err;
1431
1432 if (tmp_addr.ss_family == AF_INET6) {
1433 startsep = "[";
1434 endsep = "]";
1435 match_netid = "tcp6";
1436 match_netid_len = 4;
1437 }
1438
1439 if (naddr->netid_len != match_netid_len ||
1440 strncmp(naddr->netid, match_netid, naddr->netid_len))
1441 goto out_err;
1442
1443 /* Construct the raw data for the vfs_kern_mount call */
1444 len = RPC_MAX_ADDRBUFLEN + 1;
1445 ipaddr = kzalloc(size: len, GFP_KERNEL);
1446 if (!ipaddr)
1447 goto out_err;
1448
1449 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1450
1451 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1452
1453 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1454 raw_data = kzalloc(size: raw_len, GFP_KERNEL);
1455 if (!raw_data)
1456 goto out_free_ipaddr;
1457
1458 snprintf(buf: raw_data, size: raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1459
1460 status = nfserr_nodev;
1461 type = get_fs_type(name: "nfs");
1462 if (!type)
1463 goto out_free_rawdata;
1464
1465 /* Set the server:<export> for the vfs_kern_mount call */
1466 dev_name = kzalloc(size: len + 5, GFP_KERNEL);
1467 if (!dev_name)
1468 goto out_free_rawdata;
1469 snprintf(buf: dev_name, size: len + 5, fmt: "%s%s%s:/", startsep, ipaddr, endsep);
1470
1471 status = nfsd4_ssc_setup_dul(nn, ipaddr, nsui, rqstp);
1472 if (status)
1473 goto out_free_devname;
1474 if ((*nsui)->nsui_vfsmount)
1475 goto out_done;
1476
1477 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1478 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, name: dev_name, data: raw_data);
1479 module_put(module: type->owner);
1480 if (IS_ERR(ptr: ss_mnt)) {
1481 status = nfserr_nodev;
1482 nfsd4_ssc_cancel_dul(nn, nsui: *nsui);
1483 goto out_free_devname;
1484 }
1485 nfsd4_ssc_update_dul(nn, nsui: *nsui, ss_mnt);
1486out_done:
1487 status = 0;
1488
1489out_free_devname:
1490 kfree(objp: dev_name);
1491out_free_rawdata:
1492 kfree(objp: raw_data);
1493out_free_ipaddr:
1494 kfree(objp: ipaddr);
1495out_err:
1496 return status;
1497}
1498
1499/*
1500 * Verify COPY destination stateid.
1501 *
1502 * Connect to the source server with NFSv4.1.
1503 * Create the source struct file for nfsd_copy_range.
1504 * Called with COPY cstate:
1505 * SAVED_FH: source filehandle
1506 * CURRENT_FH: destination filehandle
1507 */
1508static __be32
1509nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1510 struct nfsd4_compound_state *cstate,
1511 struct nfsd4_copy *copy)
1512{
1513 struct svc_fh *s_fh = NULL;
1514 stateid_t *s_stid = &copy->cp_src_stateid;
1515 __be32 status = nfserr_inval;
1516
1517 /* Verify the destination stateid and set dst struct file*/
1518 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
1519 stateid: &copy->cp_dst_stateid,
1520 WR_STATE, filp: &copy->nf_dst, NULL);
1521 if (status)
1522 goto out;
1523
1524 status = nfsd4_interssc_connect(nss: copy->cp_src, rqstp, nsui: &copy->ss_nsui);
1525 if (status)
1526 goto out;
1527
1528 s_fh = &cstate->save_fh;
1529
1530 copy->c_fh.size = s_fh->fh_handle.fh_size;
1531 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
1532 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1533 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1534 sizeof(stateid_opaque_t));
1535
1536 status = 0;
1537out:
1538 return status;
1539}
1540
1541static void
1542nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
1543 struct nfsd_file *dst)
1544{
1545 struct nfsd_net *nn = net_generic(net: dst->nf_net, id: nfsd_net_id);
1546 long timeout = msecs_to_jiffies(m: nfsd4_ssc_umount_timeout);
1547
1548 nfs42_ssc_close(filep: filp);
1549 fput(filp);
1550
1551 spin_lock(lock: &nn->nfsd_ssc_lock);
1552 list_del(entry: &nsui->nsui_list);
1553 /*
1554 * vfsmount can be shared by multiple exports,
1555 * decrement refcnt. If the count drops to 1 it
1556 * will be unmounted when nsui_expire expires.
1557 */
1558 refcount_dec(r: &nsui->nsui_refcnt);
1559 nsui->nsui_expire = jiffies + timeout;
1560 list_add_tail(new: &nsui->nsui_list, head: &nn->nfsd_ssc_mount_list);
1561 spin_unlock(lock: &nn->nfsd_ssc_lock);
1562}
1563
1564#else /* CONFIG_NFSD_V4_2_INTER_SSC */
1565
1566static __be32
1567nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1568 struct nfsd4_compound_state *cstate,
1569 struct nfsd4_copy *copy)
1570{
1571 return nfserr_inval;
1572}
1573
1574static void
1575nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
1576 struct nfsd_file *dst)
1577{
1578}
1579
1580static 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
1588static __be32
1589nfsd4_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, src_stateid: &copy->cp_src_stateid,
1594 src: &copy->nf_src, dst_stateid: &copy->cp_dst_stateid,
1595 dst: &copy->nf_dst);
1596}
1597
1598static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1599{
1600 struct nfsd4_cb_offload *cbo =
1601 container_of(cb, struct nfsd4_cb_offload, co_cb);
1602
1603 kfree(objp: cbo);
1604}
1605
1606static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1607 struct rpc_task *task)
1608{
1609 struct nfsd4_cb_offload *cbo =
1610 container_of(cb, struct nfsd4_cb_offload, co_cb);
1611
1612 trace_nfsd_cb_offload_done(stp: &cbo->co_res.cb_stateid, task);
1613 return 1;
1614}
1615
1616static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1617 .release = nfsd4_cb_offload_release,
1618 .done = nfsd4_cb_offload_done
1619};
1620
1621static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1622{
1623 copy->cp_res.wr_stable_how =
1624 test_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags) ?
1625 NFS_FILE_SYNC : NFS_UNSTABLE;
1626 nfsd4_copy_set_sync(copy, sync);
1627 gen_boot_verifier(verifier: &copy->cp_res.wr_verifier, net: copy->cp_clp->net);
1628}
1629
1630static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
1631 struct file *dst,
1632 struct file *src)
1633{
1634 errseq_t since;
1635 ssize_t bytes_copied = 0;
1636 u64 bytes_total = copy->cp_count;
1637 u64 src_pos = copy->cp_src_pos;
1638 u64 dst_pos = copy->cp_dst_pos;
1639 int status;
1640 loff_t end;
1641
1642 /* See RFC 7862 p.67: */
1643 if (bytes_total == 0)
1644 bytes_total = ULLONG_MAX;
1645 do {
1646 /* Only async copies can be stopped here */
1647 if (kthread_should_stop())
1648 break;
1649 bytes_copied = nfsd_copy_file_range(src, src_pos, dst, dst_pos,
1650 bytes_total);
1651 if (bytes_copied <= 0)
1652 break;
1653 bytes_total -= bytes_copied;
1654 copy->cp_res.wr_bytes_written += bytes_copied;
1655 src_pos += bytes_copied;
1656 dst_pos += bytes_copied;
1657 } while (bytes_total > 0 && nfsd4_copy_is_async(copy));
1658 /* for a non-zero asynchronous copy do a commit of data */
1659 if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
1660 since = READ_ONCE(dst->f_wb_err);
1661 end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1;
1662 status = vfs_fsync_range(file: dst, start: copy->cp_dst_pos, end, datasync: 0);
1663 if (!status)
1664 status = filemap_check_wb_err(mapping: dst->f_mapping, since);
1665 if (!status)
1666 set_bit(NFSD4_COPY_F_COMMITTED, addr: &copy->cp_flags);
1667 }
1668 return bytes_copied;
1669}
1670
1671static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
1672 struct file *src, struct file *dst,
1673 bool sync)
1674{
1675 __be32 status;
1676 ssize_t bytes;
1677
1678 bytes = _nfsd_copy_file_range(copy, dst, src);
1679
1680 /* for async copy, we ignore the error, client can always retry
1681 * to get the error
1682 */
1683 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1684 status = nfserrno(errno: bytes);
1685 else {
1686 nfsd4_init_copy_res(copy, sync);
1687 status = nfs_ok;
1688 }
1689 return status;
1690}
1691
1692static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1693{
1694 dst->cp_src_pos = src->cp_src_pos;
1695 dst->cp_dst_pos = src->cp_dst_pos;
1696 dst->cp_count = src->cp_count;
1697 dst->cp_flags = src->cp_flags;
1698 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1699 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1700 dst->cp_clp = src->cp_clp;
1701 dst->nf_dst = nfsd_file_get(nf: src->nf_dst);
1702 /* for inter, nf_src doesn't exist yet */
1703 if (!nfsd4_ssc_is_inter(copy: src))
1704 dst->nf_src = nfsd_file_get(nf: src->nf_src);
1705
1706 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1707 memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server));
1708 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1709 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1710 dst->ss_nsui = src->ss_nsui;
1711}
1712
1713static void release_copy_files(struct nfsd4_copy *copy)
1714{
1715 if (copy->nf_src)
1716 nfsd_file_put(nf: copy->nf_src);
1717 if (copy->nf_dst)
1718 nfsd_file_put(nf: copy->nf_dst);
1719}
1720
1721static void cleanup_async_copy(struct nfsd4_copy *copy)
1722{
1723 nfs4_free_copy_state(copy);
1724 release_copy_files(copy);
1725 if (copy->cp_clp) {
1726 spin_lock(lock: &copy->cp_clp->async_lock);
1727 if (!list_empty(head: &copy->copies))
1728 list_del_init(entry: &copy->copies);
1729 spin_unlock(lock: &copy->cp_clp->async_lock);
1730 }
1731 nfs4_put_copy(copy);
1732}
1733
1734static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr)
1735{
1736 struct nfsd4_cb_offload *cbo;
1737
1738 cbo = kzalloc(size: sizeof(*cbo), GFP_KERNEL);
1739 if (!cbo)
1740 return;
1741
1742 memcpy(&cbo->co_res, &copy->cp_res, sizeof(copy->cp_res));
1743 memcpy(&cbo->co_fh, &copy->fh, sizeof(copy->fh));
1744 cbo->co_nfserr = nfserr;
1745
1746 nfsd4_init_cb(cb: &cbo->co_cb, clp: copy->cp_clp, ops: &nfsd4_cb_offload_ops,
1747 op: NFSPROC4_CLNT_CB_OFFLOAD);
1748 trace_nfsd_cb_offload(clp: copy->cp_clp, stp: &cbo->co_res.cb_stateid,
1749 fh: &cbo->co_fh, count: copy->cp_count, status: nfserr);
1750 nfsd4_run_cb(cb: &cbo->co_cb);
1751}
1752
1753/**
1754 * nfsd4_do_async_copy - kthread function for background server-side COPY
1755 * @data: arguments for COPY operation
1756 *
1757 * Return values:
1758 * %0: Copy operation is done.
1759 */
1760static int nfsd4_do_async_copy(void *data)
1761{
1762 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1763 __be32 nfserr;
1764
1765 trace_nfsd_copy_do_async(copy);
1766 if (nfsd4_ssc_is_inter(copy)) {
1767 struct file *filp;
1768
1769 filp = nfs42_ssc_open(ss_mnt: copy->ss_nsui->nsui_vfsmount,
1770 src_fh: &copy->c_fh, stateid: &copy->stateid);
1771 if (IS_ERR(ptr: filp)) {
1772 switch (PTR_ERR(ptr: filp)) {
1773 case -EBADF:
1774 nfserr = nfserr_wrong_type;
1775 break;
1776 default:
1777 nfserr = nfserr_offload_denied;
1778 }
1779 /* ss_mnt will be unmounted by the laundromat */
1780 goto do_callback;
1781 }
1782 nfserr = nfsd4_do_copy(copy, src: filp, dst: copy->nf_dst->nf_file,
1783 sync: false);
1784 nfsd4_cleanup_inter_ssc(nsui: copy->ss_nsui, filp, dst: copy->nf_dst);
1785 } else {
1786 nfserr = nfsd4_do_copy(copy, src: copy->nf_src->nf_file,
1787 dst: copy->nf_dst->nf_file, sync: false);
1788 }
1789
1790do_callback:
1791 nfsd4_send_cb_offload(copy, nfserr);
1792 cleanup_async_copy(copy);
1793 return 0;
1794}
1795
1796static __be32
1797nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1798 union nfsd4_op_u *u)
1799{
1800 struct nfsd4_copy *copy = &u->copy;
1801 __be32 status;
1802 struct nfsd4_copy *async_copy = NULL;
1803
1804 copy->cp_clp = cstate->clp;
1805 if (nfsd4_ssc_is_inter(copy)) {
1806 trace_nfsd_copy_inter(copy);
1807 if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
1808 status = nfserr_notsupp;
1809 goto out;
1810 }
1811 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy);
1812 if (status) {
1813 trace_nfsd_copy_done(copy, status);
1814 return nfserr_offload_denied;
1815 }
1816 } else {
1817 trace_nfsd_copy_intra(copy);
1818 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1819 if (status) {
1820 trace_nfsd_copy_done(copy, status);
1821 return status;
1822 }
1823 }
1824
1825 memcpy(&copy->fh, &cstate->current_fh.fh_handle,
1826 sizeof(struct knfsd_fh));
1827 if (nfsd4_copy_is_async(copy)) {
1828 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), id: nfsd_net_id);
1829
1830 status = nfserrno(errno: -ENOMEM);
1831 async_copy = kzalloc(size: sizeof(struct nfsd4_copy), GFP_KERNEL);
1832 if (!async_copy)
1833 goto out_err;
1834 INIT_LIST_HEAD(list: &async_copy->copies);
1835 refcount_set(r: &async_copy->refcount, n: 1);
1836 async_copy->cp_src = kmalloc(size: sizeof(*async_copy->cp_src), GFP_KERNEL);
1837 if (!async_copy->cp_src)
1838 goto out_err;
1839 if (!nfs4_init_copy_state(nn, copy))
1840 goto out_err;
1841 memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid.cs_stid,
1842 sizeof(copy->cp_res.cb_stateid));
1843 dup_copy_fields(src: copy, dst: async_copy);
1844 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1845 async_copy, "%s", "copy thread");
1846 if (IS_ERR(ptr: async_copy->copy_task))
1847 goto out_err;
1848 spin_lock(lock: &async_copy->cp_clp->async_lock);
1849 list_add(new: &async_copy->copies,
1850 head: &async_copy->cp_clp->async_copies);
1851 spin_unlock(lock: &async_copy->cp_clp->async_lock);
1852 wake_up_process(tsk: async_copy->copy_task);
1853 status = nfs_ok;
1854 } else {
1855 status = nfsd4_do_copy(copy, src: copy->nf_src->nf_file,
1856 dst: copy->nf_dst->nf_file, sync: true);
1857 }
1858out:
1859 trace_nfsd_copy_done(copy, status);
1860 release_copy_files(copy);
1861 return status;
1862out_err:
1863 if (nfsd4_ssc_is_inter(copy)) {
1864 /*
1865 * Source's vfsmount of inter-copy will be unmounted
1866 * by the laundromat. Use copy instead of async_copy
1867 * since async_copy->ss_nsui might not be set yet.
1868 */
1869 refcount_dec(r: &copy->ss_nsui->nsui_refcnt);
1870 }
1871 if (async_copy)
1872 cleanup_async_copy(copy: async_copy);
1873 status = nfserrno(errno: -ENOMEM);
1874 goto out;
1875}
1876
1877static struct nfsd4_copy *
1878find_async_copy_locked(struct nfs4_client *clp, stateid_t *stateid)
1879{
1880 struct nfsd4_copy *copy;
1881
1882 lockdep_assert_held(&clp->async_lock);
1883
1884 list_for_each_entry(copy, &clp->async_copies, copies) {
1885 if (memcmp(p: &copy->cp_stateid.cs_stid, q: stateid, NFS4_STATEID_SIZE))
1886 continue;
1887 return copy;
1888 }
1889 return NULL;
1890}
1891
1892static struct nfsd4_copy *
1893find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1894{
1895 struct nfsd4_copy *copy;
1896
1897 spin_lock(lock: &clp->async_lock);
1898 copy = find_async_copy_locked(clp, stateid);
1899 if (copy)
1900 refcount_inc(r: &copy->refcount);
1901 spin_unlock(lock: &clp->async_lock);
1902 return copy;
1903}
1904
1905static __be32
1906nfsd4_offload_cancel(struct svc_rqst *rqstp,
1907 struct nfsd4_compound_state *cstate,
1908 union nfsd4_op_u *u)
1909{
1910 struct nfsd4_offload_status *os = &u->offload_status;
1911 struct nfsd4_copy *copy;
1912 struct nfs4_client *clp = cstate->clp;
1913
1914 copy = find_async_copy(clp, stateid: &os->stateid);
1915 if (!copy) {
1916 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), id: nfsd_net_id);
1917
1918 return manage_cpntf_state(nn, st: &os->stateid, clp, NULL);
1919 } else
1920 nfsd4_stop_copy(copy);
1921
1922 return nfs_ok;
1923}
1924
1925static __be32
1926nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1927 union nfsd4_op_u *u)
1928{
1929 struct nfsd4_copy_notify *cn = &u->copy_notify;
1930 __be32 status;
1931 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), id: nfsd_net_id);
1932 struct nfs4_stid *stid;
1933 struct nfs4_cpntf_state *cps;
1934 struct nfs4_client *clp = cstate->clp;
1935
1936 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
1937 stateid: &cn->cpn_src_stateid, RD_STATE, NULL,
1938 cstid: &stid);
1939 if (status)
1940 return status;
1941
1942 cn->cpn_lease_time.tv_sec = nn->nfsd4_lease;
1943 cn->cpn_lease_time.tv_nsec = 0;
1944
1945 status = nfserrno(errno: -ENOMEM);
1946 cps = nfs4_alloc_init_cpntf_state(nn, p_stid: stid);
1947 if (!cps)
1948 goto out;
1949 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t));
1950 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1951 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1952
1953 /* For now, only return one server address in cpn_src, the
1954 * address used by the client to connect to this server.
1955 */
1956 cn->cpn_src->nl4_type = NL4_NETADDR;
1957 status = nfsd4_set_netaddr(addr: (struct sockaddr *)&rqstp->rq_daddr,
1958 netaddr: &cn->cpn_src->u.nl4_addr);
1959 WARN_ON_ONCE(status);
1960 if (status) {
1961 nfs4_put_cpntf_state(nn, cps);
1962 goto out;
1963 }
1964out:
1965 nfs4_put_stid(s: stid);
1966 return status;
1967}
1968
1969static __be32
1970nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1971 struct nfsd4_fallocate *fallocate, int flags)
1972{
1973 __be32 status;
1974 struct nfsd_file *nf;
1975
1976 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
1977 stateid: &fallocate->falloc_stateid,
1978 WR_STATE, filp: &nf, NULL);
1979 if (status != nfs_ok)
1980 return status;
1981
1982 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1983 fallocate->falloc_offset,
1984 fallocate->falloc_length,
1985 flags);
1986 nfsd_file_put(nf);
1987 return status;
1988}
1989
1990static __be32
1991nfsd4_offload_status(struct svc_rqst *rqstp,
1992 struct nfsd4_compound_state *cstate,
1993 union nfsd4_op_u *u)
1994{
1995 struct nfsd4_offload_status *os = &u->offload_status;
1996 __be32 status = nfs_ok;
1997 struct nfsd4_copy *copy;
1998 struct nfs4_client *clp = cstate->clp;
1999
2000 spin_lock(lock: &clp->async_lock);
2001 copy = find_async_copy_locked(clp, stateid: &os->stateid);
2002 if (copy)
2003 os->count = copy->cp_res.wr_bytes_written;
2004 else
2005 status = nfserr_bad_stateid;
2006 spin_unlock(lock: &clp->async_lock);
2007
2008 return status;
2009}
2010
2011static __be32
2012nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2013 union nfsd4_op_u *u)
2014{
2015 return nfsd4_fallocate(rqstp, cstate, fallocate: &u->allocate, flags: 0);
2016}
2017
2018static __be32
2019nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2020 union nfsd4_op_u *u)
2021{
2022 return nfsd4_fallocate(rqstp, cstate, fallocate: &u->deallocate,
2023 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
2024}
2025
2026static __be32
2027nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2028 union nfsd4_op_u *u)
2029{
2030 struct nfsd4_seek *seek = &u->seek;
2031 int whence;
2032 __be32 status;
2033 struct nfsd_file *nf;
2034
2035 status = nfs4_preprocess_stateid_op(rqstp, cstate, fhp: &cstate->current_fh,
2036 stateid: &seek->seek_stateid,
2037 RD_STATE, filp: &nf, NULL);
2038 if (status)
2039 return status;
2040
2041 switch (seek->seek_whence) {
2042 case NFS4_CONTENT_DATA:
2043 whence = SEEK_DATA;
2044 break;
2045 case NFS4_CONTENT_HOLE:
2046 whence = SEEK_HOLE;
2047 break;
2048 default:
2049 status = nfserr_union_notsupp;
2050 goto out;
2051 }
2052
2053 /*
2054 * Note: This call does change file->f_pos, but nothing in NFSD
2055 * should ever file->f_pos.
2056 */
2057 seek->seek_pos = vfs_llseek(file: nf->nf_file, offset: seek->seek_offset, whence);
2058 if (seek->seek_pos < 0)
2059 status = nfserrno(errno: seek->seek_pos);
2060 else if (seek->seek_pos >= i_size_read(inode: file_inode(f: nf->nf_file)))
2061 seek->seek_eof = true;
2062
2063out:
2064 nfsd_file_put(nf);
2065 return status;
2066}
2067
2068/* This routine never returns NFS_OK! If there are no other errors, it
2069 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
2070 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
2071 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
2072 */
2073static __be32
2074_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2075 struct nfsd4_verify *verify)
2076{
2077 __be32 *buf, *p;
2078 int count;
2079 __be32 status;
2080
2081 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
2082 if (status)
2083 return status;
2084
2085 status = check_attr_support(rqstp, cstate, bmval: verify->ve_bmval, NULL);
2086 if (status)
2087 return status;
2088
2089 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
2090 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
2091 return nfserr_inval;
2092 if (verify->ve_attrlen & 3)
2093 return nfserr_inval;
2094
2095 /* count in words:
2096 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
2097 */
2098 count = 4 + (verify->ve_attrlen >> 2);
2099 buf = kmalloc(size: count << 2, GFP_KERNEL);
2100 if (!buf)
2101 return nfserr_jukebox;
2102
2103 p = buf;
2104 status = nfsd4_encode_fattr_to_buf(p: &p, words: count, fhp: &cstate->current_fh,
2105 exp: cstate->current_fh.fh_export,
2106 dentry: cstate->current_fh.fh_dentry,
2107 bmval: verify->ve_bmval,
2108 rqstp, ignore_crossmnt: 0);
2109 /*
2110 * If nfsd4_encode_fattr() ran out of space, assume that's because
2111 * the attributes are longer (hence different) than those given:
2112 */
2113 if (status == nfserr_resource)
2114 status = nfserr_not_same;
2115 if (status)
2116 goto out_kfree;
2117
2118 /* skip bitmap */
2119 p = buf + 1 + ntohl(buf[0]);
2120 status = nfserr_not_same;
2121 if (ntohl(*p++) != verify->ve_attrlen)
2122 goto out_kfree;
2123 if (!memcmp(p, q: verify->ve_attrval, size: verify->ve_attrlen))
2124 status = nfserr_same;
2125
2126out_kfree:
2127 kfree(objp: buf);
2128 return status;
2129}
2130
2131static __be32
2132nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2133 union nfsd4_op_u *u)
2134{
2135 __be32 status;
2136
2137 status = _nfsd4_verify(rqstp, cstate, verify: &u->verify);
2138 return status == nfserr_not_same ? nfs_ok : status;
2139}
2140
2141static __be32
2142nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2143 union nfsd4_op_u *u)
2144{
2145 __be32 status;
2146
2147 status = _nfsd4_verify(rqstp, cstate, verify: &u->nverify);
2148 return status == nfserr_same ? nfs_ok : status;
2149}
2150
2151#ifdef CONFIG_NFSD_PNFS
2152static const struct nfsd4_layout_ops *
2153nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
2154{
2155 if (!exp->ex_layout_types) {
2156 dprintk("%s: export does not support pNFS\n", __func__);
2157 return NULL;
2158 }
2159
2160 if (layout_type >= LAYOUT_TYPE_MAX ||
2161 !(exp->ex_layout_types & (1 << layout_type))) {
2162 dprintk("%s: layout type %d not supported\n",
2163 __func__, layout_type);
2164 return NULL;
2165 }
2166
2167 return nfsd4_layout_ops[layout_type];
2168}
2169
2170static __be32
2171nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
2172 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2173{
2174 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
2175 const struct nfsd4_layout_ops *ops;
2176 struct nfsd4_deviceid_map *map;
2177 struct svc_export *exp;
2178 __be32 nfserr;
2179
2180 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
2181 __func__,
2182 gdp->gd_layout_type,
2183 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
2184 gdp->gd_maxcount);
2185
2186 map = nfsd4_find_devid_map(idx: gdp->gd_devid.fsid_idx);
2187 if (!map) {
2188 dprintk("%s: couldn't find device ID to export mapping!\n",
2189 __func__);
2190 return nfserr_noent;
2191 }
2192
2193 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
2194 if (IS_ERR(ptr: exp)) {
2195 dprintk("%s: could not find device id\n", __func__);
2196 return nfserr_noent;
2197 }
2198
2199 nfserr = nfserr_layoutunavailable;
2200 ops = nfsd4_layout_verify(exp, layout_type: gdp->gd_layout_type);
2201 if (!ops)
2202 goto out;
2203
2204 nfserr = nfs_ok;
2205 if (gdp->gd_maxcount != 0) {
2206 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
2207 rqstp, cstate->clp, gdp);
2208 }
2209
2210 gdp->gd_notify_types &= ops->notify_types;
2211out:
2212 exp_put(exp);
2213 return nfserr;
2214}
2215
2216static void
2217nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
2218{
2219 kfree(objp: u->getdeviceinfo.gd_device);
2220}
2221
2222static __be32
2223nfsd4_layoutget(struct svc_rqst *rqstp,
2224 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2225{
2226 struct nfsd4_layoutget *lgp = &u->layoutget;
2227 struct svc_fh *current_fh = &cstate->current_fh;
2228 const struct nfsd4_layout_ops *ops;
2229 struct nfs4_layout_stateid *ls;
2230 __be32 nfserr;
2231 int accmode = NFSD_MAY_READ_IF_EXEC;
2232
2233 switch (lgp->lg_seg.iomode) {
2234 case IOMODE_READ:
2235 accmode |= NFSD_MAY_READ;
2236 break;
2237 case IOMODE_RW:
2238 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
2239 break;
2240 default:
2241 dprintk("%s: invalid iomode %d\n",
2242 __func__, lgp->lg_seg.iomode);
2243 nfserr = nfserr_badiomode;
2244 goto out;
2245 }
2246
2247 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
2248 if (nfserr)
2249 goto out;
2250
2251 nfserr = nfserr_layoutunavailable;
2252 ops = nfsd4_layout_verify(exp: current_fh->fh_export, layout_type: lgp->lg_layout_type);
2253 if (!ops)
2254 goto out;
2255
2256 /*
2257 * Verify minlength and range as per RFC5661:
2258 * o If loga_length is less than loga_minlength,
2259 * the metadata server MUST return NFS4ERR_INVAL.
2260 * o If the sum of loga_offset and loga_minlength exceeds
2261 * NFS4_UINT64_MAX, and loga_minlength is not
2262 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
2263 * o If the sum of loga_offset and loga_length exceeds
2264 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
2265 * the error NFS4ERR_INVAL MUST result.
2266 */
2267 nfserr = nfserr_inval;
2268 if (lgp->lg_seg.length < lgp->lg_minlength ||
2269 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
2270 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
2271 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
2272 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
2273 goto out;
2274 if (lgp->lg_seg.length == 0)
2275 goto out;
2276
2277 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, stateid: &lgp->lg_sid,
2278 create: true, layout_type: lgp->lg_layout_type, lsp: &ls);
2279 if (nfserr) {
2280 trace_nfsd_layout_get_lookup_fail(stp: &lgp->lg_sid);
2281 goto out;
2282 }
2283
2284 nfserr = nfserr_recallconflict;
2285 if (atomic_read(v: &ls->ls_stid.sc_file->fi_lo_recalls))
2286 goto out_put_stid;
2287
2288 nfserr = ops->proc_layoutget(d_inode(dentry: current_fh->fh_dentry),
2289 current_fh, lgp);
2290 if (nfserr)
2291 goto out_put_stid;
2292
2293 nfserr = nfsd4_insert_layout(lgp, ls);
2294
2295out_put_stid:
2296 mutex_unlock(lock: &ls->ls_mutex);
2297 nfs4_put_stid(s: &ls->ls_stid);
2298out:
2299 return nfserr;
2300}
2301
2302static void
2303nfsd4_layoutget_release(union nfsd4_op_u *u)
2304{
2305 kfree(objp: u->layoutget.lg_content);
2306}
2307
2308static __be32
2309nfsd4_layoutcommit(struct svc_rqst *rqstp,
2310 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2311{
2312 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
2313 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
2314 struct svc_fh *current_fh = &cstate->current_fh;
2315 const struct nfsd4_layout_ops *ops;
2316 loff_t new_size = lcp->lc_last_wr + 1;
2317 struct inode *inode;
2318 struct nfs4_layout_stateid *ls;
2319 __be32 nfserr;
2320
2321 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2322 if (nfserr)
2323 goto out;
2324
2325 nfserr = nfserr_layoutunavailable;
2326 ops = nfsd4_layout_verify(exp: current_fh->fh_export, layout_type: lcp->lc_layout_type);
2327 if (!ops)
2328 goto out;
2329 inode = d_inode(dentry: current_fh->fh_dentry);
2330
2331 nfserr = nfserr_inval;
2332 if (new_size <= seg->offset) {
2333 dprintk("pnfsd: last write before layout segment\n");
2334 goto out;
2335 }
2336 if (new_size > seg->offset + seg->length) {
2337 dprintk("pnfsd: last write beyond layout segment\n");
2338 goto out;
2339 }
2340 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2341 dprintk("pnfsd: layoutcommit beyond EOF\n");
2342 goto out;
2343 }
2344
2345 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, stateid: &lcp->lc_sid,
2346 create: false, layout_type: lcp->lc_layout_type,
2347 lsp: &ls);
2348 if (nfserr) {
2349 trace_nfsd_layout_commit_lookup_fail(stp: &lcp->lc_sid);
2350 /* fixup error code as per RFC5661 */
2351 if (nfserr == nfserr_bad_stateid)
2352 nfserr = nfserr_badlayout;
2353 goto out;
2354 }
2355
2356 /* LAYOUTCOMMIT does not require any serialization */
2357 mutex_unlock(lock: &ls->ls_mutex);
2358
2359 if (new_size > i_size_read(inode)) {
2360 lcp->lc_size_chg = true;
2361 lcp->lc_newsize = new_size;
2362 } else {
2363 lcp->lc_size_chg = false;
2364 }
2365
2366 nfserr = ops->proc_layoutcommit(inode, lcp);
2367 nfs4_put_stid(s: &ls->ls_stid);
2368out:
2369 return nfserr;
2370}
2371
2372static __be32
2373nfsd4_layoutreturn(struct svc_rqst *rqstp,
2374 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2375{
2376 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2377 struct svc_fh *current_fh = &cstate->current_fh;
2378 __be32 nfserr;
2379
2380 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2381 if (nfserr)
2382 goto out;
2383
2384 nfserr = nfserr_layoutunavailable;
2385 if (!nfsd4_layout_verify(exp: current_fh->fh_export, layout_type: lrp->lr_layout_type))
2386 goto out;
2387
2388 switch (lrp->lr_seg.iomode) {
2389 case IOMODE_READ:
2390 case IOMODE_RW:
2391 case IOMODE_ANY:
2392 break;
2393 default:
2394 dprintk("%s: invalid iomode %d\n", __func__,
2395 lrp->lr_seg.iomode);
2396 nfserr = nfserr_inval;
2397 goto out;
2398 }
2399
2400 switch (lrp->lr_return_type) {
2401 case RETURN_FILE:
2402 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2403 break;
2404 case RETURN_FSID:
2405 case RETURN_ALL:
2406 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2407 break;
2408 default:
2409 dprintk("%s: invalid return_type %d\n", __func__,
2410 lrp->lr_return_type);
2411 nfserr = nfserr_inval;
2412 break;
2413 }
2414out:
2415 return nfserr;
2416}
2417#endif /* CONFIG_NFSD_PNFS */
2418
2419static __be32
2420nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2421 union nfsd4_op_u *u)
2422{
2423 struct nfsd4_getxattr *getxattr = &u->getxattr;
2424
2425 return nfsd_getxattr(rqstp, fhp: &cstate->current_fh,
2426 name: getxattr->getxa_name, bufp: &getxattr->getxa_buf,
2427 lenp: &getxattr->getxa_len);
2428}
2429
2430static __be32
2431nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2432 union nfsd4_op_u *u)
2433{
2434 struct nfsd4_setxattr *setxattr = &u->setxattr;
2435 __be32 ret;
2436
2437 if (opens_in_grace(SVC_NET(rqstp)))
2438 return nfserr_grace;
2439
2440 ret = nfsd_setxattr(rqstp, fhp: &cstate->current_fh, name: setxattr->setxa_name,
2441 buf: setxattr->setxa_buf, len: setxattr->setxa_len,
2442 flags: setxattr->setxa_flags);
2443
2444 if (!ret)
2445 set_change_info(cinfo: &setxattr->setxa_cinfo, fhp: &cstate->current_fh);
2446
2447 return ret;
2448}
2449
2450static __be32
2451nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2452 union nfsd4_op_u *u)
2453{
2454 /*
2455 * Get the entire list, then copy out only the user attributes
2456 * in the encode function.
2457 */
2458 return nfsd_listxattr(rqstp, fhp: &cstate->current_fh,
2459 bufp: &u->listxattrs.lsxa_buf, lenp: &u->listxattrs.lsxa_len);
2460}
2461
2462static __be32
2463nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2464 union nfsd4_op_u *u)
2465{
2466 struct nfsd4_removexattr *removexattr = &u->removexattr;
2467 __be32 ret;
2468
2469 if (opens_in_grace(SVC_NET(rqstp)))
2470 return nfserr_grace;
2471
2472 ret = nfsd_removexattr(rqstp, fhp: &cstate->current_fh,
2473 name: removexattr->rmxa_name);
2474
2475 if (!ret)
2476 set_change_info(cinfo: &removexattr->rmxa_cinfo, fhp: &cstate->current_fh);
2477
2478 return ret;
2479}
2480
2481/*
2482 * NULL call.
2483 */
2484static __be32
2485nfsd4_proc_null(struct svc_rqst *rqstp)
2486{
2487 return rpc_success;
2488}
2489
2490static inline void nfsd4_increment_op_stats(u32 opnum)
2491{
2492 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2493 percpu_counter_inc(fbc: &nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
2494}
2495
2496static const struct nfsd4_operation nfsd4_ops[];
2497
2498static const char *nfsd4_op_name(unsigned opnum);
2499
2500/*
2501 * Enforce NFSv4.1 COMPOUND ordering rules:
2502 *
2503 * Also note, enforced elsewhere:
2504 * - SEQUENCE other than as first op results in
2505 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2506 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2507 * (Enforced in nfsd4_bind_conn_to_session().)
2508 * - DESTROY_SESSION must be the final operation in a compound, if
2509 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2510 * (Enforced in nfsd4_destroy_session().)
2511 */
2512static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2513{
2514 struct nfsd4_op *first_op = &args->ops[0];
2515
2516 /* These ordering requirements don't apply to NFSv4.0: */
2517 if (args->minorversion == 0)
2518 return nfs_ok;
2519 /* This is weird, but OK, not our problem: */
2520 if (args->opcnt == 0)
2521 return nfs_ok;
2522 if (first_op->status == nfserr_op_illegal)
2523 return nfs_ok;
2524 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2525 return nfserr_op_not_in_session;
2526 if (first_op->opnum == OP_SEQUENCE)
2527 return nfs_ok;
2528 /*
2529 * So first_op is something allowed outside a session, like
2530 * EXCHANGE_ID; but then it has to be the only op in the
2531 * compound:
2532 */
2533 if (args->opcnt != 1)
2534 return nfserr_not_only_op;
2535 return nfs_ok;
2536}
2537
2538const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2539{
2540 return &nfsd4_ops[op->opnum];
2541}
2542
2543bool nfsd4_cache_this_op(struct nfsd4_op *op)
2544{
2545 if (op->opnum == OP_ILLEGAL)
2546 return false;
2547 return OPDESC(op)->op_flags & OP_CACHEME;
2548}
2549
2550static bool need_wrongsec_check(struct svc_rqst *rqstp)
2551{
2552 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2553 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2554 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2555 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2556 const struct nfsd4_operation *thisd = OPDESC(op: this);
2557 const struct nfsd4_operation *nextd;
2558
2559 /*
2560 * Most ops check wronsec on our own; only the putfh-like ops
2561 * have special rules.
2562 */
2563 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2564 return false;
2565 /*
2566 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2567 * put-filehandle operation if we're not going to use the
2568 * result:
2569 */
2570 if (argp->opcnt == resp->opcnt)
2571 return false;
2572 if (next->opnum == OP_ILLEGAL)
2573 return false;
2574 nextd = OPDESC(op: next);
2575 /*
2576 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2577 * errors themselves as necessary; others should check for them
2578 * now:
2579 */
2580 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2581}
2582
2583#ifdef CONFIG_NFSD_V4_2_INTER_SSC
2584static void
2585check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2586{
2587 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2588 struct nfsd4_copy *copy;
2589 struct nfsd4_putfh *putfh;
2590 int i;
2591
2592 /* traverse all operation and if it's a COPY compound, mark the
2593 * source filehandle to skip verification
2594 */
2595 for (i = 0; i < args->opcnt; i++) {
2596 op = &args->ops[i];
2597 if (op->opnum == OP_PUTFH)
2598 current_op = op;
2599 else if (op->opnum == OP_SAVEFH)
2600 saved_op = current_op;
2601 else if (op->opnum == OP_RESTOREFH)
2602 current_op = saved_op;
2603 else if (op->opnum == OP_COPY) {
2604 copy = (struct nfsd4_copy *)&op->u;
2605 if (!saved_op) {
2606 op->status = nfserr_nofilehandle;
2607 return;
2608 }
2609 putfh = (struct nfsd4_putfh *)&saved_op->u;
2610 if (nfsd4_ssc_is_inter(copy))
2611 putfh->no_verify = true;
2612 }
2613 }
2614}
2615#else
2616static void
2617check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2618{
2619}
2620#endif
2621
2622/*
2623 * COMPOUND call.
2624 */
2625static __be32
2626nfsd4_proc_compound(struct svc_rqst *rqstp)
2627{
2628 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2629 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2630 struct nfsd4_op *op;
2631 struct nfsd4_compound_state *cstate = &resp->cstate;
2632 struct svc_fh *current_fh = &cstate->current_fh;
2633 struct svc_fh *save_fh = &cstate->save_fh;
2634 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), id: nfsd_net_id);
2635 __be32 status;
2636
2637 resp->xdr = &rqstp->rq_res_stream;
2638 resp->statusp = resp->xdr->p;
2639
2640 /* reserve space for: NFS status code */
2641 xdr_reserve_space(xdr: resp->xdr, XDR_UNIT);
2642
2643 /* reserve space for: taglen, tag, and opcnt */
2644 xdr_reserve_space(xdr: resp->xdr, XDR_UNIT * 2 + args->taglen);
2645 resp->taglen = args->taglen;
2646 resp->tag = args->tag;
2647 resp->rqstp = rqstp;
2648 cstate->minorversion = args->minorversion;
2649 fh_init(fhp: current_fh, NFS4_FHSIZE);
2650 fh_init(fhp: save_fh, NFS4_FHSIZE);
2651 /*
2652 * Don't use the deferral mechanism for NFSv4; compounds make it
2653 * too hard to avoid non-idempotency problems.
2654 */
2655 clear_bit(nr: RQ_USEDEFERRAL, addr: &rqstp->rq_flags);
2656
2657 /*
2658 * According to RFC3010, this takes precedence over all other errors.
2659 */
2660 status = nfserr_minor_vers_mismatch;
2661 if (nfsd_minorversion(nn, minorversion: args->minorversion, change: NFSD_TEST) <= 0)
2662 goto out;
2663
2664 status = nfs41_check_op_ordering(args);
2665 if (status) {
2666 op = &args->ops[0];
2667 op->status = status;
2668 resp->opcnt = 1;
2669 goto encode_op;
2670 }
2671 check_if_stalefh_allowed(args);
2672
2673 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2674
2675 trace_nfsd_compound(rqst: rqstp, tag: args->tag, taglen: args->taglen, opcnt: args->client_opcnt);
2676 while (!status && resp->opcnt < args->opcnt) {
2677 op = &args->ops[resp->opcnt++];
2678
2679 if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
2680 /* If there are still more operations to process,
2681 * stop here and report NFS4ERR_RESOURCE. */
2682 if (cstate->minorversion == 0 &&
2683 args->client_opcnt > resp->opcnt) {
2684 op->status = nfserr_resource;
2685 goto encode_op;
2686 }
2687 }
2688
2689 /*
2690 * The XDR decode routines may have pre-set op->status;
2691 * for example, if there is a miscellaneous XDR error
2692 * it will be set to nfserr_bad_xdr.
2693 */
2694 if (op->status) {
2695 if (op->opnum == OP_OPEN)
2696 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2697 goto encode_op;
2698 }
2699 if (!current_fh->fh_dentry &&
2700 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2701 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2702 op->status = nfserr_nofilehandle;
2703 goto encode_op;
2704 }
2705 } else if (current_fh->fh_export &&
2706 current_fh->fh_export->ex_fslocs.migrated &&
2707 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2708 op->status = nfserr_moved;
2709 goto encode_op;
2710 }
2711
2712 fh_clear_pre_post_attrs(fhp: current_fh);
2713
2714 /* If op is non-idempotent */
2715 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2716 /*
2717 * Don't execute this op if we couldn't encode a
2718 * successful reply:
2719 */
2720 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2721 /*
2722 * Plus if there's another operation, make sure
2723 * we'll have space to at least encode an error:
2724 */
2725 if (resp->opcnt < args->opcnt)
2726 plen += COMPOUND_ERR_SLACK_SPACE;
2727 op->status = nfsd4_check_resp_size(resp, plen);
2728 }
2729
2730 if (op->status)
2731 goto encode_op;
2732
2733 if (op->opdesc->op_get_currentstateid)
2734 op->opdesc->op_get_currentstateid(cstate, &op->u);
2735 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2736
2737 /* Only from SEQUENCE */
2738 if (cstate->status == nfserr_replay_cache) {
2739 dprintk("%s NFS4.1 replay from cache\n", __func__);
2740 status = op->status;
2741 goto out;
2742 }
2743 if (!op->status) {
2744 if (op->opdesc->op_set_currentstateid)
2745 op->opdesc->op_set_currentstateid(cstate, &op->u);
2746
2747 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2748 clear_current_stateid(cstate);
2749
2750 if (current_fh->fh_export &&
2751 need_wrongsec_check(rqstp))
2752 op->status = check_nfsd_access(exp: current_fh->fh_export, rqstp);
2753 }
2754encode_op:
2755 if (op->status == nfserr_replay_me) {
2756 op->replay = &cstate->replay_owner->so_replay;
2757 nfsd4_encode_replay(xdr: resp->xdr, op);
2758 status = op->status = op->replay->rp_status;
2759 } else {
2760 nfsd4_encode_operation(resp, op);
2761 status = op->status;
2762 }
2763
2764 trace_nfsd_compound_status(args_opcnt: args->client_opcnt, resp_opcnt: resp->opcnt,
2765 status, name: nfsd4_op_name(opnum: op->opnum));
2766
2767 nfsd4_cstate_clear_replay(cstate);
2768 nfsd4_increment_op_stats(opnum: op->opnum);
2769 }
2770
2771 fh_put(current_fh);
2772 fh_put(save_fh);
2773 BUG_ON(cstate->replay_owner);
2774out:
2775 cstate->status = status;
2776 /* Reset deferral mechanism for RPC deferrals */
2777 set_bit(nr: RQ_USEDEFERRAL, addr: &rqstp->rq_flags);
2778 return rpc_success;
2779}
2780
2781#define op_encode_hdr_size (2)
2782#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2783#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2784#define op_encode_change_info_maxsz (5)
2785#define nfs4_fattr_bitmap_maxsz (4)
2786
2787/* We'll fall back on returning no lockowner if run out of space: */
2788#define op_encode_lockowner_maxsz (0)
2789#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2790
2791#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2792
2793#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2794#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2795 op_encode_ace_maxsz)
2796
2797#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2798
2799/*
2800 * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which
2801 * is called before sunrpc sets rq_res.buflen. Thus we have to compute
2802 * the maximum payload size here, based on transport limits and the size
2803 * of the remaining space in the rq_pages array.
2804 */
2805static u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
2806{
2807 u32 buflen;
2808
2809 buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
2810 buflen -= rqstp->rq_auth_slack;
2811 buflen -= rqstp->rq_res.head[0].iov_len;
2812 return min_t(u32, buflen, svc_max_payload(rqstp));
2813}
2814
2815static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
2816 const struct nfsd4_op *op)
2817{
2818 return (op_encode_hdr_size) * sizeof(__be32);
2819}
2820
2821static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
2822 const struct nfsd4_op *op)
2823{
2824 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2825}
2826
2827static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
2828 const struct nfsd4_op *op)
2829{
2830 /* ac_supported, ac_resp_access */
2831 return (op_encode_hdr_size + 2)* sizeof(__be32);
2832}
2833
2834static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
2835 const struct nfsd4_op *op)
2836{
2837 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2838}
2839
2840static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
2841 const struct nfsd4_op *op)
2842{
2843 return (op_encode_hdr_size + op_encode_change_info_maxsz
2844 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2845}
2846
2847/*
2848 * Note since this is an idempotent operation we won't insist on failing
2849 * the op prematurely if the estimate is too large. We may turn off splice
2850 * reads unnecessarily.
2851 */
2852static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
2853 const struct nfsd4_op *op)
2854{
2855 const u32 *bmap = op->u.getattr.ga_bmval;
2856 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2857 u32 ret = 0;
2858
2859 if (bmap0 & FATTR4_WORD0_ACL)
2860 return nfsd4_max_payload(rqstp);
2861 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2862 return nfsd4_max_payload(rqstp);
2863
2864 if (bmap1 & FATTR4_WORD1_OWNER) {
2865 ret += IDMAP_NAMESZ + 4;
2866 bmap1 &= ~FATTR4_WORD1_OWNER;
2867 }
2868 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2869 ret += IDMAP_NAMESZ + 4;
2870 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2871 }
2872 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2873 ret += NFS4_FHSIZE + 4;
2874 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2875 }
2876 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2877 ret += NFS4_MAXLABELLEN + 12;
2878 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2879 }
2880 /*
2881 * Largest of remaining attributes are 16 bytes (e.g.,
2882 * supported_attributes)
2883 */
2884 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2885 /* bitmask, length */
2886 ret += 20;
2887 return ret;
2888}
2889
2890static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
2891 const struct nfsd4_op *op)
2892{
2893 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2894}
2895
2896static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
2897 const struct nfsd4_op *op)
2898{
2899 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2900 * sizeof(__be32);
2901}
2902
2903static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
2904 const struct nfsd4_op *op)
2905{
2906 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2907 * sizeof(__be32);
2908}
2909
2910static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
2911 const struct nfsd4_op *op)
2912{
2913 return (op_encode_hdr_size + op_encode_stateid_maxsz
2914 + op_encode_change_info_maxsz + 1
2915 + nfs4_fattr_bitmap_maxsz
2916 + op_encode_delegation_maxsz) * sizeof(__be32);
2917}
2918
2919static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
2920 const struct nfsd4_op *op)
2921{
2922 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
2923
2924 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2925}
2926
2927static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
2928 const struct nfsd4_op *op)
2929{
2930 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
2931 /*
2932 * If we detect that the file changed during hole encoding, then we
2933 * recover by encoding the remaining reply as data. This means we need
2934 * to set aside enough room to encode two data segments.
2935 */
2936 u32 seg_len = 2 * (1 + 2 + 1);
2937
2938 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2939}
2940
2941static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
2942 const struct nfsd4_op *op)
2943{
2944 u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
2945
2946 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2947 XDR_QUADLEN(rlen)) * sizeof(__be32);
2948}
2949
2950static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
2951 const struct nfsd4_op *op)
2952{
2953 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2954}
2955
2956static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
2957 const struct nfsd4_op *op)
2958{
2959 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2960 * sizeof(__be32);
2961}
2962
2963static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
2964 const struct nfsd4_op *op)
2965{
2966 return (op_encode_hdr_size + op_encode_change_info_maxsz
2967 + op_encode_change_info_maxsz) * sizeof(__be32);
2968}
2969
2970static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
2971 const struct nfsd4_op *op)
2972{
2973 return (op_encode_hdr_size
2974 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2975}
2976
2977static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
2978 const struct nfsd4_op *op)
2979{
2980 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2981 * sizeof(__be32);
2982}
2983
2984static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
2985 const struct nfsd4_op *op)
2986{
2987 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2988}
2989
2990static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
2991 const struct nfsd4_op *op)
2992{
2993 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2994 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2995}
2996
2997static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
2998 const struct nfsd4_op *op)
2999{
3000 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
3001 sizeof(__be32);
3002}
3003
3004static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
3005 const struct nfsd4_op *op)
3006{
3007 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
3008}
3009
3010static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
3011 const struct nfsd4_op *op)
3012{
3013 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
3014 1 + 1 + /* eir_flags, spr_how */\
3015 4 + /* spo_must_enforce & _allow with bitmap */\
3016 2 + /*eir_server_owner.so_minor_id */\
3017 /* eir_server_owner.so_major_id<> */\
3018 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
3019 /* eir_server_scope<> */\
3020 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
3021 1 + /* eir_server_impl_id array length */\
3022 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
3023}
3024
3025static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
3026 const struct nfsd4_op *op)
3027{
3028 return (op_encode_hdr_size + \
3029 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
3030 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
3031}
3032
3033static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
3034 const struct nfsd4_op *op)
3035{
3036 return (op_encode_hdr_size + \
3037 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
3038 2 + /* csr_sequence, csr_flags */\
3039 op_encode_channel_attrs_maxsz + \
3040 op_encode_channel_attrs_maxsz) * sizeof(__be32);
3041}
3042
3043static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
3044 const struct nfsd4_op *op)
3045{
3046 return (op_encode_hdr_size +
3047 1 /* wr_callback */ +
3048 op_encode_stateid_maxsz /* wr_callback */ +
3049 2 /* wr_count */ +
3050 1 /* wr_committed */ +
3051 op_encode_verifier_maxsz +
3052 1 /* cr_consecutive */ +
3053 1 /* cr_synchronous */) * sizeof(__be32);
3054}
3055
3056static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
3057 const struct nfsd4_op *op)
3058{
3059 return (op_encode_hdr_size +
3060 2 /* osr_count */ +
3061 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
3062}
3063
3064static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
3065 const struct nfsd4_op *op)
3066{
3067 return (op_encode_hdr_size +
3068 3 /* cnr_lease_time */ +
3069 1 /* We support one cnr_source_server */ +
3070 1 /* cnr_stateid seq */ +
3071 op_encode_stateid_maxsz /* cnr_stateid */ +
3072 1 /* num cnr_source_server*/ +
3073 1 /* nl4_type */ +
3074 1 /* nl4 size */ +
3075 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
3076 * sizeof(__be32);
3077}
3078
3079#ifdef CONFIG_NFSD_PNFS
3080static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
3081 const struct nfsd4_op *op)
3082{
3083 u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
3084
3085 return (op_encode_hdr_size +
3086 1 /* gd_layout_type*/ +
3087 XDR_QUADLEN(rlen) +
3088 2 /* gd_notify_types */) * sizeof(__be32);
3089}
3090
3091/*
3092 * At this stage we don't really know what layout driver will handle the request,
3093 * so we need to define an arbitrary upper bound here.
3094 */
3095#define MAX_LAYOUT_SIZE 128
3096static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
3097 const struct nfsd4_op *op)
3098{
3099 return (op_encode_hdr_size +
3100 1 /* logr_return_on_close */ +
3101 op_encode_stateid_maxsz +
3102 1 /* nr of layouts */ +
3103 MAX_LAYOUT_SIZE) * sizeof(__be32);
3104}
3105
3106static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
3107 const struct nfsd4_op *op)
3108{
3109 return (op_encode_hdr_size +
3110 1 /* locr_newsize */ +
3111 2 /* ns_size */) * sizeof(__be32);
3112}
3113
3114static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
3115 const struct nfsd4_op *op)
3116{
3117 return (op_encode_hdr_size +
3118 1 /* lrs_stateid */ +
3119 op_encode_stateid_maxsz) * sizeof(__be32);
3120}
3121#endif /* CONFIG_NFSD_PNFS */
3122
3123
3124static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
3125 const struct nfsd4_op *op)
3126{
3127 return (op_encode_hdr_size + 3) * sizeof(__be32);
3128}
3129
3130static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
3131 const struct nfsd4_op *op)
3132{
3133 u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
3134
3135 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
3136}
3137
3138static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
3139 const struct nfsd4_op *op)
3140{
3141 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3142 * sizeof(__be32);
3143}
3144static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
3145 const struct nfsd4_op *op)
3146{
3147 u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
3148
3149 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
3150}
3151
3152static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
3153 const struct nfsd4_op *op)
3154{
3155 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3156 * sizeof(__be32);
3157}
3158
3159
3160static const struct nfsd4_operation nfsd4_ops[] = {
3161 [OP_ACCESS] = {
3162 .op_func = nfsd4_access,
3163 .op_name = "OP_ACCESS",
3164 .op_rsize_bop = nfsd4_access_rsize,
3165 },
3166 [OP_CLOSE] = {
3167 .op_func = nfsd4_close,
3168 .op_flags = OP_MODIFIES_SOMETHING,
3169 .op_name = "OP_CLOSE",
3170 .op_rsize_bop = nfsd4_status_stateid_rsize,
3171 .op_get_currentstateid = nfsd4_get_closestateid,
3172 .op_set_currentstateid = nfsd4_set_closestateid,
3173 },
3174 [OP_COMMIT] = {
3175 .op_func = nfsd4_commit,
3176 .op_flags = OP_MODIFIES_SOMETHING,
3177 .op_name = "OP_COMMIT",
3178 .op_rsize_bop = nfsd4_commit_rsize,
3179 },
3180 [OP_CREATE] = {
3181 .op_func = nfsd4_create,
3182 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
3183 .op_name = "OP_CREATE",
3184 .op_rsize_bop = nfsd4_create_rsize,
3185 },
3186 [OP_DELEGRETURN] = {
3187 .op_func = nfsd4_delegreturn,
3188 .op_flags = OP_MODIFIES_SOMETHING,
3189 .op_name = "OP_DELEGRETURN",
3190 .op_rsize_bop = nfsd4_only_status_rsize,
3191 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
3192 },
3193 [OP_GETATTR] = {
3194 .op_func = nfsd4_getattr,
3195 .op_flags = ALLOWED_ON_ABSENT_FS,
3196 .op_rsize_bop = nfsd4_getattr_rsize,
3197 .op_name = "OP_GETATTR",
3198 },
3199 [OP_GETFH] = {
3200 .op_func = nfsd4_getfh,
3201 .op_name = "OP_GETFH",
3202 .op_rsize_bop = nfsd4_getfh_rsize,
3203 },
3204 [OP_LINK] = {
3205 .op_func = nfsd4_link,
3206 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
3207 | OP_CACHEME,
3208 .op_name = "OP_LINK",
3209 .op_rsize_bop = nfsd4_link_rsize,
3210 },
3211 [OP_LOCK] = {
3212 .op_func = nfsd4_lock,
3213 .op_release = nfsd4_lock_release,
3214 .op_flags = OP_MODIFIES_SOMETHING |
3215 OP_NONTRIVIAL_ERROR_ENCODE,
3216 .op_name = "OP_LOCK",
3217 .op_rsize_bop = nfsd4_lock_rsize,
3218 .op_set_currentstateid = nfsd4_set_lockstateid,
3219 },
3220 [OP_LOCKT] = {
3221 .op_func = nfsd4_lockt,
3222 .op_release = nfsd4_lockt_release,
3223 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
3224 .op_name = "OP_LOCKT",
3225 .op_rsize_bop = nfsd4_lock_rsize,
3226 },
3227 [OP_LOCKU] = {
3228 .op_func = nfsd4_locku,
3229 .op_flags = OP_MODIFIES_SOMETHING,
3230 .op_name = "OP_LOCKU",
3231 .op_rsize_bop = nfsd4_status_stateid_rsize,
3232 .op_get_currentstateid = nfsd4_get_lockustateid,
3233 },
3234 [OP_LOOKUP] = {
3235 .op_func = nfsd4_lookup,
3236 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3237 .op_name = "OP_LOOKUP",
3238 .op_rsize_bop = nfsd4_only_status_rsize,
3239 },
3240 [OP_LOOKUPP] = {
3241 .op_func = nfsd4_lookupp,
3242 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3243 .op_name = "OP_LOOKUPP",
3244 .op_rsize_bop = nfsd4_only_status_rsize,
3245 },
3246 [OP_NVERIFY] = {
3247 .op_func = nfsd4_nverify,
3248 .op_name = "OP_NVERIFY",
3249 .op_rsize_bop = nfsd4_only_status_rsize,
3250 },
3251 [OP_OPEN] = {
3252 .op_func = nfsd4_open,
3253 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3254 .op_name = "OP_OPEN",
3255 .op_rsize_bop = nfsd4_open_rsize,
3256 .op_set_currentstateid = nfsd4_set_openstateid,
3257 },
3258 [OP_OPEN_CONFIRM] = {
3259 .op_func = nfsd4_open_confirm,
3260 .op_flags = OP_MODIFIES_SOMETHING,
3261 .op_name = "OP_OPEN_CONFIRM",
3262 .op_rsize_bop = nfsd4_status_stateid_rsize,
3263 },
3264 [OP_OPEN_DOWNGRADE] = {
3265 .op_func = nfsd4_open_downgrade,
3266 .op_flags = OP_MODIFIES_SOMETHING,
3267 .op_name = "OP_OPEN_DOWNGRADE",
3268 .op_rsize_bop = nfsd4_status_stateid_rsize,
3269 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
3270 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
3271 },
3272 [OP_PUTFH] = {
3273 .op_func = nfsd4_putfh,
3274 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3275 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3276 .op_name = "OP_PUTFH",
3277 .op_rsize_bop = nfsd4_only_status_rsize,
3278 },
3279 [OP_PUTPUBFH] = {
3280 .op_func = nfsd4_putrootfh,
3281 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3282 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3283 .op_name = "OP_PUTPUBFH",
3284 .op_rsize_bop = nfsd4_only_status_rsize,
3285 },
3286 [OP_PUTROOTFH] = {
3287 .op_func = nfsd4_putrootfh,
3288 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3289 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3290 .op_name = "OP_PUTROOTFH",
3291 .op_rsize_bop = nfsd4_only_status_rsize,
3292 },
3293 [OP_READ] = {
3294 .op_func = nfsd4_read,
3295 .op_release = nfsd4_read_release,
3296 .op_name = "OP_READ",
3297 .op_rsize_bop = nfsd4_read_rsize,
3298 .op_get_currentstateid = nfsd4_get_readstateid,
3299 },
3300 [OP_READDIR] = {
3301 .op_func = nfsd4_readdir,
3302 .op_name = "OP_READDIR",
3303 .op_rsize_bop = nfsd4_readdir_rsize,
3304 },
3305 [OP_READLINK] = {
3306 .op_func = nfsd4_readlink,
3307 .op_name = "OP_READLINK",
3308 .op_rsize_bop = nfsd4_readlink_rsize,
3309 },
3310 [OP_REMOVE] = {
3311 .op_func = nfsd4_remove,
3312 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3313 .op_name = "OP_REMOVE",
3314 .op_rsize_bop = nfsd4_remove_rsize,
3315 },
3316 [OP_RENAME] = {
3317 .op_func = nfsd4_rename,
3318 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3319 .op_name = "OP_RENAME",
3320 .op_rsize_bop = nfsd4_rename_rsize,
3321 },
3322 [OP_RENEW] = {
3323 .op_func = nfsd4_renew,
3324 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3325 | OP_MODIFIES_SOMETHING,
3326 .op_name = "OP_RENEW",
3327 .op_rsize_bop = nfsd4_only_status_rsize,
3328
3329 },
3330 [OP_RESTOREFH] = {
3331 .op_func = nfsd4_restorefh,
3332 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3333 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
3334 .op_name = "OP_RESTOREFH",
3335 .op_rsize_bop = nfsd4_only_status_rsize,
3336 },
3337 [OP_SAVEFH] = {
3338 .op_func = nfsd4_savefh,
3339 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3340 .op_name = "OP_SAVEFH",
3341 .op_rsize_bop = nfsd4_only_status_rsize,
3342 },
3343 [OP_SECINFO] = {
3344 .op_func = nfsd4_secinfo,
3345 .op_release = nfsd4_secinfo_release,
3346 .op_flags = OP_HANDLES_WRONGSEC,
3347 .op_name = "OP_SECINFO",
3348 .op_rsize_bop = nfsd4_secinfo_rsize,
3349 },
3350 [OP_SETATTR] = {
3351 .op_func = nfsd4_setattr,
3352 .op_name = "OP_SETATTR",
3353 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3354 | OP_NONTRIVIAL_ERROR_ENCODE,
3355 .op_rsize_bop = nfsd4_setattr_rsize,
3356 .op_get_currentstateid = nfsd4_get_setattrstateid,
3357 },
3358 [OP_SETCLIENTID] = {
3359 .op_func = nfsd4_setclientid,
3360 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3361 | OP_MODIFIES_SOMETHING | OP_CACHEME
3362 | OP_NONTRIVIAL_ERROR_ENCODE,
3363 .op_name = "OP_SETCLIENTID",
3364 .op_rsize_bop = nfsd4_setclientid_rsize,
3365 },
3366 [OP_SETCLIENTID_CONFIRM] = {
3367 .op_func = nfsd4_setclientid_confirm,
3368 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3369 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3370 .op_name = "OP_SETCLIENTID_CONFIRM",
3371 .op_rsize_bop = nfsd4_only_status_rsize,
3372 },
3373 [OP_VERIFY] = {
3374 .op_func = nfsd4_verify,
3375 .op_name = "OP_VERIFY",
3376 .op_rsize_bop = nfsd4_only_status_rsize,
3377 },
3378 [OP_WRITE] = {
3379 .op_func = nfsd4_write,
3380 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3381 .op_name = "OP_WRITE",
3382 .op_rsize_bop = nfsd4_write_rsize,
3383 .op_get_currentstateid = nfsd4_get_writestateid,
3384 },
3385 [OP_RELEASE_LOCKOWNER] = {
3386 .op_func = nfsd4_release_lockowner,
3387 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3388 | OP_MODIFIES_SOMETHING,
3389 .op_name = "OP_RELEASE_LOCKOWNER",
3390 .op_rsize_bop = nfsd4_only_status_rsize,
3391 },
3392
3393 /* NFSv4.1 operations */
3394 [OP_EXCHANGE_ID] = {
3395 .op_func = nfsd4_exchange_id,
3396 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3397 | OP_MODIFIES_SOMETHING,
3398 .op_name = "OP_EXCHANGE_ID",
3399 .op_rsize_bop = nfsd4_exchange_id_rsize,
3400 },
3401 [OP_BACKCHANNEL_CTL] = {
3402 .op_func = nfsd4_backchannel_ctl,
3403 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3404 .op_name = "OP_BACKCHANNEL_CTL",
3405 .op_rsize_bop = nfsd4_only_status_rsize,
3406 },
3407 [OP_BIND_CONN_TO_SESSION] = {
3408 .op_func = nfsd4_bind_conn_to_session,
3409 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3410 | OP_MODIFIES_SOMETHING,
3411 .op_name = "OP_BIND_CONN_TO_SESSION",
3412 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3413 },
3414 [OP_CREATE_SESSION] = {
3415 .op_func = nfsd4_create_session,
3416 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3417 | OP_MODIFIES_SOMETHING,
3418 .op_name = "OP_CREATE_SESSION",
3419 .op_rsize_bop = nfsd4_create_session_rsize,
3420 },
3421 [OP_DESTROY_SESSION] = {
3422 .op_func = nfsd4_destroy_session,
3423 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3424 | OP_MODIFIES_SOMETHING,
3425 .op_name = "OP_DESTROY_SESSION",
3426 .op_rsize_bop = nfsd4_only_status_rsize,
3427 },
3428 [OP_SEQUENCE] = {
3429 .op_func = nfsd4_sequence,
3430 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3431 .op_name = "OP_SEQUENCE",
3432 .op_rsize_bop = nfsd4_sequence_rsize,
3433 },
3434 [OP_DESTROY_CLIENTID] = {
3435 .op_func = nfsd4_destroy_clientid,
3436 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3437 | OP_MODIFIES_SOMETHING,
3438 .op_name = "OP_DESTROY_CLIENTID",
3439 .op_rsize_bop = nfsd4_only_status_rsize,
3440 },
3441 [OP_RECLAIM_COMPLETE] = {
3442 .op_func = nfsd4_reclaim_complete,
3443 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3444 .op_name = "OP_RECLAIM_COMPLETE",
3445 .op_rsize_bop = nfsd4_only_status_rsize,
3446 },
3447 [OP_SECINFO_NO_NAME] = {
3448 .op_func = nfsd4_secinfo_no_name,
3449 .op_release = nfsd4_secinfo_no_name_release,
3450 .op_flags = OP_HANDLES_WRONGSEC,
3451 .op_name = "OP_SECINFO_NO_NAME",
3452 .op_rsize_bop = nfsd4_secinfo_rsize,
3453 },
3454 [OP_TEST_STATEID] = {
3455 .op_func = nfsd4_test_stateid,
3456 .op_flags = ALLOWED_WITHOUT_FH,
3457 .op_name = "OP_TEST_STATEID",
3458 .op_rsize_bop = nfsd4_test_stateid_rsize,
3459 },
3460 [OP_FREE_STATEID] = {
3461 .op_func = nfsd4_free_stateid,
3462 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3463 .op_name = "OP_FREE_STATEID",
3464 .op_get_currentstateid = nfsd4_get_freestateid,
3465 .op_rsize_bop = nfsd4_only_status_rsize,
3466 },
3467#ifdef CONFIG_NFSD_PNFS
3468 [OP_GETDEVICEINFO] = {
3469 .op_func = nfsd4_getdeviceinfo,
3470 .op_release = nfsd4_getdeviceinfo_release,
3471 .op_flags = ALLOWED_WITHOUT_FH,
3472 .op_name = "OP_GETDEVICEINFO",
3473 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3474 },
3475 [OP_LAYOUTGET] = {
3476 .op_func = nfsd4_layoutget,
3477 .op_release = nfsd4_layoutget_release,
3478 .op_flags = OP_MODIFIES_SOMETHING,
3479 .op_name = "OP_LAYOUTGET",
3480 .op_rsize_bop = nfsd4_layoutget_rsize,
3481 },
3482 [OP_LAYOUTCOMMIT] = {
3483 .op_func = nfsd4_layoutcommit,
3484 .op_flags = OP_MODIFIES_SOMETHING,
3485 .op_name = "OP_LAYOUTCOMMIT",
3486 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3487 },
3488 [OP_LAYOUTRETURN] = {
3489 .op_func = nfsd4_layoutreturn,
3490 .op_flags = OP_MODIFIES_SOMETHING,
3491 .op_name = "OP_LAYOUTRETURN",
3492 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3493 },
3494#endif /* CONFIG_NFSD_PNFS */
3495
3496 /* NFSv4.2 operations */
3497 [OP_ALLOCATE] = {
3498 .op_func = nfsd4_allocate,
3499 .op_flags = OP_MODIFIES_SOMETHING,
3500 .op_name = "OP_ALLOCATE",
3501 .op_rsize_bop = nfsd4_only_status_rsize,
3502 },
3503 [OP_DEALLOCATE] = {
3504 .op_func = nfsd4_deallocate,
3505 .op_flags = OP_MODIFIES_SOMETHING,
3506 .op_name = "OP_DEALLOCATE",
3507 .op_rsize_bop = nfsd4_only_status_rsize,
3508 },
3509 [OP_CLONE] = {
3510 .op_func = nfsd4_clone,
3511 .op_flags = OP_MODIFIES_SOMETHING,
3512 .op_name = "OP_CLONE",
3513 .op_rsize_bop = nfsd4_only_status_rsize,
3514 },
3515 [OP_COPY] = {
3516 .op_func = nfsd4_copy,
3517 .op_flags = OP_MODIFIES_SOMETHING,
3518 .op_name = "OP_COPY",
3519 .op_rsize_bop = nfsd4_copy_rsize,
3520 },
3521 [OP_READ_PLUS] = {
3522 .op_func = nfsd4_read,
3523 .op_release = nfsd4_read_release,
3524 .op_name = "OP_READ_PLUS",
3525 .op_rsize_bop = nfsd4_read_plus_rsize,
3526 .op_get_currentstateid = nfsd4_get_readstateid,
3527 },
3528 [OP_SEEK] = {
3529 .op_func = nfsd4_seek,
3530 .op_name = "OP_SEEK",
3531 .op_rsize_bop = nfsd4_seek_rsize,
3532 },
3533 [OP_OFFLOAD_STATUS] = {
3534 .op_func = nfsd4_offload_status,
3535 .op_name = "OP_OFFLOAD_STATUS",
3536 .op_rsize_bop = nfsd4_offload_status_rsize,
3537 },
3538 [OP_OFFLOAD_CANCEL] = {
3539 .op_func = nfsd4_offload_cancel,
3540 .op_flags = OP_MODIFIES_SOMETHING,
3541 .op_name = "OP_OFFLOAD_CANCEL",
3542 .op_rsize_bop = nfsd4_only_status_rsize,
3543 },
3544 [OP_COPY_NOTIFY] = {
3545 .op_func = nfsd4_copy_notify,
3546 .op_flags = OP_MODIFIES_SOMETHING,
3547 .op_name = "OP_COPY_NOTIFY",
3548 .op_rsize_bop = nfsd4_copy_notify_rsize,
3549 },
3550 [OP_GETXATTR] = {
3551 .op_func = nfsd4_getxattr,
3552 .op_name = "OP_GETXATTR",
3553 .op_rsize_bop = nfsd4_getxattr_rsize,
3554 },
3555 [OP_SETXATTR] = {
3556 .op_func = nfsd4_setxattr,
3557 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3558 .op_name = "OP_SETXATTR",
3559 .op_rsize_bop = nfsd4_setxattr_rsize,
3560 },
3561 [OP_LISTXATTRS] = {
3562 .op_func = nfsd4_listxattrs,
3563 .op_name = "OP_LISTXATTRS",
3564 .op_rsize_bop = nfsd4_listxattrs_rsize,
3565 },
3566 [OP_REMOVEXATTR] = {
3567 .op_func = nfsd4_removexattr,
3568 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3569 .op_name = "OP_REMOVEXATTR",
3570 .op_rsize_bop = nfsd4_removexattr_rsize,
3571 },
3572};
3573
3574/**
3575 * nfsd4_spo_must_allow - Determine if the compound op contains an
3576 * operation that is allowed to be sent with machine credentials
3577 *
3578 * @rqstp: a pointer to the struct svc_rqst
3579 *
3580 * Checks to see if the compound contains a spo_must_allow op
3581 * and confirms that it was sent with the proper machine creds.
3582 */
3583
3584bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3585{
3586 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3587 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3588 struct nfsd4_op *this;
3589 struct nfsd4_compound_state *cstate = &resp->cstate;
3590 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3591 u32 opiter;
3592
3593 if (!cstate->minorversion)
3594 return false;
3595
3596 if (cstate->spo_must_allowed)
3597 return true;
3598
3599 opiter = resp->opcnt;
3600 while (opiter < argp->opcnt) {
3601 this = &argp->ops[opiter++];
3602 if (test_bit(this->opnum, allow->u.longs) &&
3603 cstate->clp->cl_mach_cred &&
3604 nfsd4_mach_creds_match(cl: cstate->clp, rqstp)) {
3605 cstate->spo_must_allowed = true;
3606 return true;
3607 }
3608 }
3609 cstate->spo_must_allowed = false;
3610 return false;
3611}
3612
3613int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3614{
3615 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3616 return op_encode_hdr_size * sizeof(__be32);
3617
3618 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3619 return OPDESC(op)->op_rsize_bop(rqstp, op);
3620}
3621
3622void warn_on_nonidempotent_op(struct nfsd4_op *op)
3623{
3624 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3625 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
3626 op->opnum, nfsd4_op_name(op->opnum));
3627 WARN_ON_ONCE(1);
3628 }
3629}
3630
3631static const char *nfsd4_op_name(unsigned opnum)
3632{
3633 if (opnum < ARRAY_SIZE(nfsd4_ops))
3634 return nfsd4_ops[opnum].op_name;
3635 return "unknown_operation";
3636}
3637
3638static const struct svc_procedure nfsd_procedures4[2] = {
3639 [NFSPROC4_NULL] = {
3640 .pc_func = nfsd4_proc_null,
3641 .pc_decode = nfssvc_decode_voidarg,
3642 .pc_encode = nfssvc_encode_voidres,
3643 .pc_argsize = sizeof(struct nfsd_voidargs),
3644 .pc_argzero = sizeof(struct nfsd_voidargs),
3645 .pc_ressize = sizeof(struct nfsd_voidres),
3646 .pc_cachetype = RC_NOCACHE,
3647 .pc_xdrressize = 1,
3648 .pc_name = "NULL",
3649 },
3650 [NFSPROC4_COMPOUND] = {
3651 .pc_func = nfsd4_proc_compound,
3652 .pc_decode = nfs4svc_decode_compoundargs,
3653 .pc_encode = nfs4svc_encode_compoundres,
3654 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3655 .pc_argzero = offsetof(struct nfsd4_compoundargs, iops),
3656 .pc_ressize = sizeof(struct nfsd4_compoundres),
3657 .pc_release = nfsd4_release_compoundargs,
3658 .pc_cachetype = RC_NOCACHE,
3659 .pc_xdrressize = NFSD_BUFSIZE/4,
3660 .pc_name = "COMPOUND",
3661 },
3662};
3663
3664static DEFINE_PER_CPU_ALIGNED(unsigned long,
3665 nfsd_count4[ARRAY_SIZE(nfsd_procedures4)]);
3666const struct svc_version nfsd_version4 = {
3667 .vs_vers = 4,
3668 .vs_nproc = ARRAY_SIZE(nfsd_procedures4),
3669 .vs_proc = nfsd_procedures4,
3670 .vs_count = nfsd_count4,
3671 .vs_dispatch = nfsd_dispatch,
3672 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3673 .vs_rpcb_optnl = true,
3674 .vs_need_cong_ctrl = true,
3675};
3676

source code of linux/fs/nfsd/nfs4proc.c