2 * Server-side procedures for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
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>
42 #include <linux/sunrpc/addr.h>
43 #include <linux/nfs_ssc.h>
49 #include "current_stateid.h"
55 static bool inter_copy_offload_enable;
56 module_param(inter_copy_offload_enable, bool, 0644);
57 MODULE_PARM_DESC(inter_copy_offload_enable,
58 "Enable inter server to server copy offload. Default: false");
60 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
61 static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
62 module_param(nfsd4_ssc_umount_timeout, int, 0644);
63 MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
64 "idle msecs before unmount export from source server");
67 #define NFSDDBG_FACILITY NFSDDBG_PROC
69 static u32 nfsd_attrmask[] = {
70 NFSD_WRITEABLE_ATTRS_WORD0,
71 NFSD_WRITEABLE_ATTRS_WORD1,
72 NFSD_WRITEABLE_ATTRS_WORD2
75 static u32 nfsd41_ex_attrmask[] = {
76 NFSD_SUPPATTR_EXCLCREAT_WORD0,
77 NFSD_SUPPATTR_EXCLCREAT_WORD1,
78 NFSD_SUPPATTR_EXCLCREAT_WORD2
82 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
83 u32 *bmval, u32 *writable)
85 struct dentry *dentry = cstate->current_fh.fh_dentry;
86 struct svc_export *exp = cstate->current_fh.fh_export;
88 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
89 return nfserr_attrnotsupp;
90 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
91 return nfserr_attrnotsupp;
92 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
93 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
94 return nfserr_attrnotsupp;
95 if (writable && !bmval_is_subset(bmval, writable))
97 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
98 (bmval[1] & FATTR4_WORD1_MODE))
104 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
105 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
107 __be32 status = nfs_ok;
109 if (open->op_create == NFS4_OPEN_CREATE) {
110 if (open->op_createmode == NFS4_CREATE_UNCHECKED
111 || open->op_createmode == NFS4_CREATE_GUARDED)
112 status = check_attr_support(rqstp, cstate,
113 open->op_bmval, nfsd_attrmask);
114 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
115 status = check_attr_support(rqstp, cstate,
116 open->op_bmval, nfsd41_ex_attrmask);
123 is_create_with_attrs(struct nfsd4_open *open)
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);
132 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
135 dget(src->fh_dentry);
137 exp_get(src->fh_export);
142 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
145 if (open->op_truncate &&
146 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
149 accmode |= NFSD_MAY_READ_IF_EXEC;
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;
158 return fh_verify(rqstp, current_fh, S_IFREG, accmode);
161 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
163 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
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
176 return nfserr_symlink;
179 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
181 if (nfsd4_has_session(cstate))
183 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
187 static inline bool nfsd4_create_is_exclusive(int createmode)
189 return createmode == NFS4_CREATE_EXCLUSIVE ||
190 createmode == NFS4_CREATE_EXCLUSIVE4_1;
194 nfsd4_vfs_create(struct svc_fh *fhp, struct dentry *child,
195 struct nfsd4_open *open)
201 oflags = O_CREAT | O_LARGEFILE;
202 switch (open->op_share_access & NFS4_SHARE_ACCESS_BOTH) {
203 case NFS4_SHARE_ACCESS_WRITE:
206 case NFS4_SHARE_ACCESS_BOTH:
213 path.mnt = fhp->fh_export->ex_path.mnt;
215 filp = dentry_create(&path, oflags, open->op_iattr.ia_mode,
218 return nfserrno(PTR_ERR(filp));
220 open->op_filp = filp;
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().
229 * Upon return, caller must release @fhp and @resfhp.
232 nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
233 struct svc_fh *resfhp, struct nfsd4_open *open)
235 struct iattr *iap = &open->op_iattr;
236 struct nfsd_attrs attrs = {
238 .na_seclabel = &open->op_label,
240 struct dentry *parent, *child;
241 __u32 v_mtime, v_atime;
246 if (isdotent(open->op_fname, open->op_fnamelen))
248 if (!(iap->ia_valid & ATTR_MODE))
251 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
252 if (status != nfs_ok)
254 parent = fhp->fh_dentry;
255 inode = d_inode(parent);
257 host_err = fh_want_write(fhp);
259 return nfserrno(host_err);
261 if (is_create_with_attrs(open))
262 nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
264 inode_lock_nested(inode, I_MUTEX_PARENT);
266 child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
268 status = nfserrno(PTR_ERR(child));
272 if (d_really_is_negative(child)) {
273 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
274 if (status != nfs_ok)
278 status = fh_compose(resfhp, fhp->fh_export, child, fhp);
279 if (status != nfs_ok)
284 if (nfsd4_create_is_exclusive(open->op_createmode)) {
285 u32 *verifier = (u32 *)open->op_verf.data;
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
295 v_mtime = verifier[0] & 0x7fffffff;
296 v_atime = verifier[1] & 0x7fffffff;
299 if (d_really_is_positive(child)) {
300 /* NFSv4 protocol requires change attributes even though
301 * no change happened.
303 status = fh_fill_both_attrs(fhp);
304 if (status != nfs_ok)
307 switch (open->op_createmode) {
308 case NFS4_CREATE_UNCHECKED:
309 if (!d_is_reg(child))
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!
318 open->op_truncate = (iap->ia_valid & ATTR_SIZE) &&
321 case NFS4_CREATE_GUARDED:
322 status = nfserr_exist;
324 case NFS4_CREATE_EXCLUSIVE:
325 if (inode_get_mtime_sec(d_inode(child)) == v_mtime &&
326 inode_get_atime_sec(d_inode(child)) == v_atime &&
327 d_inode(child)->i_size == 0) {
328 open->op_created = true;
331 status = nfserr_exist;
333 case NFS4_CREATE_EXCLUSIVE4_1:
334 if (inode_get_mtime_sec(d_inode(child)) == v_mtime &&
335 inode_get_atime_sec(d_inode(child)) == v_atime &&
336 d_inode(child)->i_size == 0) {
337 open->op_created = true;
338 goto set_attr; /* subtle */
340 status = nfserr_exist;
345 if (!IS_POSIXACL(inode))
346 iap->ia_mode &= ~current_umask();
348 status = fh_fill_pre_attrs(fhp);
349 if (status != nfs_ok)
351 status = nfsd4_vfs_create(fhp, child, open);
352 if (status != nfs_ok)
354 open->op_created = true;
355 fh_fill_post_attrs(fhp);
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(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;
370 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
372 if (attrs.na_labelerr)
373 open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
375 open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
378 nfsd_attrs_free(&attrs);
379 if (child && !IS_ERR(child))
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
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.
395 set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
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;
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.
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.
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;
418 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
420 struct svc_fh *current_fh = &cstate->current_fh;
424 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
426 return nfserr_jukebox;
427 fh_init(*resfh, NFS4_FHSIZE);
428 open->op_truncate = false;
430 if (open->op_create) {
431 /* FIXME: check session persistence and pnfs flags.
432 * The nfsv4.1 spec requires the following semantics:
434 * Persistent | pNFS | Server REQUIRED | Client Allowed
435 * Reply Cache | server | |
436 * -------------+--------+-----------------+--------------------
437 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
439 * | | and EXCLUSIVE4 | or EXCLUSIVE4
441 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
442 * yes | no | GUARDED4 | GUARDED4
443 * yes | yes | GUARDED4 | GUARDED4
446 current->fs->umask = open->op_umask;
447 status = nfsd4_create_file(rqstp, current_fh, *resfh, open);
448 current->fs->umask = 0;
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:
455 if (nfsd4_create_is_exclusive(open->op_createmode) && status == 0)
456 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
457 FATTR4_WORD1_TIME_MODIFY);
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.
465 status = fh_fill_both_attrs(current_fh);
469 status = nfsd_check_obj_isreg(*resfh);
473 nfsd4_set_open_owner_reply_cache(cstate, open, *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, *resfh, open, accmode);
479 set_change_info(&open->op_cinfo, current_fh);
485 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
487 struct svc_fh *current_fh = &cstate->current_fh;
490 /* We don't know the target directory, and therefore can not
491 * set the change info
494 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
496 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
498 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
499 (open->op_iattr.ia_size == 0);
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.
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).
509 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
510 accmode = NFSD_MAY_OWNER_OVERRIDE;
512 return do_open_permission(rqstp, current_fh, open, accmode);
516 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
518 struct nfsd4_sessionid *sid =
519 (struct nfsd4_sessionid *)session->se_sessionid.data;
521 clid->cl_boot = sid->clientid.cl_boot;
522 clid->cl_id = sid->clientid.cl_id;
526 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 struct nfsd4_open *open = &u->open;
531 struct svc_fh *resfh = NULL;
532 struct net *net = SVC_NET(rqstp);
533 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
534 bool reclaim = false;
536 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
537 (int)open->op_fnamelen, open->op_fname,
540 open->op_filp = NULL;
541 open->op_rqstp = rqstp;
543 /* This check required by spec. */
544 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
547 open->op_created = false;
550 * Before RECLAIM_COMPLETE done, server should deny new lock
552 if (nfsd4_has_session(cstate) &&
553 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
554 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
557 if (nfsd4_has_session(cstate))
558 copy_clientid(&open->op_clientid, cstate->session);
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(&cstate->current_fh.fh_handle,
567 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
569 dprintk("nfsd4_open: replay failed"
570 " restoring previous filehandle\n");
572 status = nfserr_replay_me;
576 if (open->op_xdr_error) {
577 status = open->op_xdr_error;
581 status = nfsd4_check_open_attributes(rqstp, cstate, open);
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)
590 status = nfserr_no_grace;
591 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
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);
601 case NFS4_OPEN_CLAIM_PREVIOUS:
602 status = nfs4_check_open_reclaim(cstate->clp);
605 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
608 case NFS4_OPEN_CLAIM_FH:
609 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
610 status = do_open_fhandle(rqstp, cstate, open);
613 resfh = &cstate->current_fh;
615 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
616 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
617 status = nfserr_notsupp;
620 status = nfserr_inval;
624 status = nfsd4_process_open2(rqstp, 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;
633 open->op_filp = NULL;
635 if (resfh && resfh != &cstate->current_fh) {
636 fh_dup2(&cstate->current_fh, resfh);
640 nfsd4_cleanup_open_state(cstate, open);
641 nfsd4_bump_seqid(cstate, status);
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.
651 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
653 struct nfsd4_open *open = &op->u.open;
655 if (!seqid_mutating_err(ntohl(op->status)))
657 if (nfsd4_has_session(cstate))
659 open->op_xdr_error = op->status;
660 return nfsd4_open(rqstp, cstate, &op->u);
664 * filehandle-manipulating ops.
667 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
670 u->getfh = &cstate->current_fh;
675 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
678 struct nfsd4_putfh *putfh = &u->putfh;
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,
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);
696 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
699 fh_put(&cstate->current_fh);
701 return exp_pseudoroot(rqstp, &cstate->current_fh);
705 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 if (!cstate->save_fh.fh_dentry)
709 return nfserr_restorefh;
711 fh_dup2(&cstate->current_fh, &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);
720 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
723 fh_dup2(&cstate->save_fh, &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);
735 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
738 struct nfsd4_access *access = &u->access;
741 access_full = NFS3_ACCESS_FULL;
742 if (cstate->minorversion >= 2)
743 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
746 if (access->ac_req_access & ~access_full)
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);
754 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
756 __be32 *verf = (__be32 *)verifier->data;
758 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
760 nfsd_copy_write_verifier(verf, net_generic(net, nfsd_net_id));
764 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
767 struct nfsd4_commit *commit = &u->commit;
768 struct nfsd_file *nf;
771 status = nfsd_file_acquire(rqstp, &cstate->current_fh, NFSD_MAY_WRITE |
772 NFSD_MAY_NOT_BREAK_LEASE, &nf);
773 if (status != nfs_ok)
776 status = nfsd_commit(rqstp, &cstate->current_fh, nf, commit->co_offset,
778 (__be32 *)commit->co_verf.data);
784 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
787 struct nfsd4_create *create = &u->create;
788 struct nfsd_attrs attrs = {
789 .na_iattr = &create->cr_iattr,
790 .na_seclabel = &create->cr_label,
796 fh_init(&resfh, NFS4_FHSIZE);
798 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
802 status = check_attr_support(rqstp, cstate, create->cr_bmval,
807 status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
808 current->fs->umask = create->cr_umask;
809 switch (create->cr_type) {
811 status = nfsd_symlink(rqstp, &cstate->current_fh,
812 create->cr_name, create->cr_namelen,
813 create->cr_data, &attrs, &resfh);
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)
822 status = nfsd_create(rqstp, &cstate->current_fh,
823 create->cr_name, create->cr_namelen,
824 &attrs, S_IFBLK, rdev, &resfh);
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)
833 status = nfsd_create(rqstp, &cstate->current_fh,
834 create->cr_name, create->cr_namelen,
835 &attrs, S_IFCHR, rdev, &resfh);
839 status = nfsd_create(rqstp, &cstate->current_fh,
840 create->cr_name, create->cr_namelen,
841 &attrs, S_IFSOCK, 0, &resfh);
845 status = nfsd_create(rqstp, &cstate->current_fh,
846 create->cr_name, create->cr_namelen,
847 &attrs, S_IFIFO, 0, &resfh);
851 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
852 status = nfsd_create(rqstp, &cstate->current_fh,
853 create->cr_name, create->cr_namelen,
854 &attrs, S_IFDIR, 0, &resfh);
858 status = nfserr_badtype;
864 if (attrs.na_labelerr)
865 create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
867 create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
868 set_change_info(&create->cr_cinfo, &cstate->current_fh);
869 fh_dup2(&cstate->current_fh, &resfh);
873 current->fs->umask = 0;
874 nfsd_attrs_free(&attrs);
879 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
882 struct nfsd4_getattr *getattr = &u->getattr;
885 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
889 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
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];
896 getattr->ga_fhp = &cstate->current_fh;
901 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
904 struct nfsd4_link *link = &u->link;
907 status = nfsd_link(rqstp, &cstate->current_fh,
908 link->li_name, link->li_namelen, &cstate->save_fh);
910 set_change_info(&link->li_cinfo, &cstate->current_fh);
914 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
916 struct svc_fh tmp_fh;
919 fh_init(&tmp_fh, NFS4_FHSIZE);
920 ret = exp_pseudoroot(rqstp, &tmp_fh);
923 if (tmp_fh.fh_dentry == fh->fh_dentry) {
928 return nfsd_lookup(rqstp, fh, "..", 2, fh);
932 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
935 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
939 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
942 return nfsd_lookup(rqstp, &cstate->current_fh,
943 u->lookup.lo_name, u->lookup.lo_len,
944 &cstate->current_fh);
948 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
951 struct nfsd4_read *read = &u->read;
956 trace_nfsd_read_start(rqstp, &cstate->current_fh,
957 read->rd_offset, read->rd_length);
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;
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.
970 * To ensure proper ordering, we therefore turn off zero copy if
971 * the client wants us to do more in this compound:
973 if (!nfsd4_last_compound_op(rqstp)) {
974 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
976 argp->splice_ok = false;
980 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
981 &read->rd_stateid, RD_STATE,
984 read->rd_rqstp = rqstp;
985 read->rd_fhp = &cstate->current_fh;
991 nfsd4_read_release(union nfsd4_op_u *u)
994 nfsd_file_put(u->read.rd_nf);
995 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
996 u->read.rd_offset, u->read.rd_length);
1000 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1001 union nfsd4_op_u *u)
1003 struct nfsd4_readdir *readdir = &u->readdir;
1004 u64 cookie = readdir->rd_cookie;
1005 static const nfs4_verifier zeroverf;
1007 /* no need to check permission - this will be done in nfsd_readdir() */
1009 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
1010 return nfserr_inval;
1012 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
1013 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
1014 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1016 if ((cookie == 1) || (cookie == 2) ||
1017 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
1018 return nfserr_bad_cookie;
1020 readdir->rd_rqstp = rqstp;
1021 readdir->rd_fhp = &cstate->current_fh;
1026 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1027 union nfsd4_op_u *u)
1029 u->readlink.rl_rqstp = rqstp;
1030 u->readlink.rl_fhp = &cstate->current_fh;
1035 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1036 union nfsd4_op_u *u)
1038 struct nfsd4_remove *remove = &u->remove;
1041 if (opens_in_grace(SVC_NET(rqstp)))
1042 return nfserr_grace;
1043 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
1044 remove->rm_name, remove->rm_namelen);
1046 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1051 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1052 union nfsd4_op_u *u)
1054 struct nfsd4_rename *rename = &u->rename;
1057 if (opens_in_grace(SVC_NET(rqstp)))
1058 return nfserr_grace;
1059 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
1060 rename->rn_snamelen, &cstate->current_fh,
1061 rename->rn_tname, rename->rn_tnamelen);
1064 set_change_info(&rename->rn_sinfo, &cstate->save_fh);
1065 set_change_info(&rename->rn_tinfo, &cstate->current_fh);
1070 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1071 union nfsd4_op_u *u)
1073 struct nfsd4_secinfo *secinfo = &u->secinfo;
1074 struct svc_export *exp;
1075 struct dentry *dentry;
1078 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
1081 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
1082 secinfo->si_name, secinfo->si_namelen,
1086 if (d_really_is_negative(dentry)) {
1090 secinfo->si_exp = exp;
1092 if (cstate->minorversion)
1093 /* See rfc 5661 section 2.6.3.1.1.8 */
1094 fh_put(&cstate->current_fh);
1099 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1100 union nfsd4_op_u *u)
1104 switch (u->secinfo_no_name.sin_style) {
1105 case NFS4_SECINFO_STYLE4_CURRENT_FH:
1107 case NFS4_SECINFO_STYLE4_PARENT:
1108 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1113 return nfserr_inval;
1116 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
1117 fh_put(&cstate->current_fh);
1122 nfsd4_secinfo_release(union nfsd4_op_u *u)
1124 if (u->secinfo.si_exp)
1125 exp_put(u->secinfo.si_exp);
1129 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
1131 if (u->secinfo_no_name.sin_exp)
1132 exp_put(u->secinfo_no_name.sin_exp);
1136 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1137 union nfsd4_op_u *u)
1139 struct nfsd4_setattr *setattr = &u->setattr;
1140 struct nfsd_attrs attrs = {
1141 .na_iattr = &setattr->sa_iattr,
1142 .na_seclabel = &setattr->sa_label,
1144 struct inode *inode;
1145 __be32 status = nfs_ok;
1149 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
1150 status = nfs4_preprocess_stateid_op(rqstp, cstate,
1151 &cstate->current_fh, &setattr->sa_stateid,
1152 WR_STATE, NULL, NULL);
1156 err = fh_want_write(&cstate->current_fh);
1158 return nfserrno(err);
1161 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
1166 inode = cstate->current_fh.fh_dentry->d_inode;
1167 status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
1168 setattr->sa_acl, &attrs);
1172 save_no_wcc = cstate->current_fh.fh_no_wcc;
1173 cstate->current_fh.fh_no_wcc = true;
1174 status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs, NULL);
1175 cstate->current_fh.fh_no_wcc = save_no_wcc;
1177 status = nfserrno(attrs.na_labelerr);
1179 status = nfserrno(attrs.na_aclerr);
1181 nfsd_attrs_free(&attrs);
1182 fh_drop_write(&cstate->current_fh);
1187 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1188 union nfsd4_op_u *u)
1190 struct nfsd4_write *write = &u->write;
1191 stateid_t *stateid = &write->wr_stateid;
1192 struct nfsd_file *nf = NULL;
1193 __be32 status = nfs_ok;
1197 if (write->wr_offset > (u64)OFFSET_MAX ||
1198 write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
1201 cnt = write->wr_buflen;
1202 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1203 write->wr_offset, cnt);
1204 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1205 stateid, WR_STATE, &nf, NULL);
1209 write->wr_how_written = write->wr_stable_how;
1211 nvecs = svc_fill_write_vector(rqstp, &write->wr_payload);
1212 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1214 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1215 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1216 write->wr_how_written,
1217 (__be32 *)write->wr_verifier.data);
1220 write->wr_bytes_written = cnt;
1221 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1222 write->wr_offset, cnt);
1227 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1228 stateid_t *src_stateid, struct nfsd_file **src,
1229 stateid_t *dst_stateid, struct nfsd_file **dst)
1233 if (!cstate->save_fh.fh_dentry)
1234 return nfserr_nofilehandle;
1236 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1237 src_stateid, RD_STATE, src, NULL);
1241 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1242 dst_stateid, WR_STATE, dst, NULL);
1246 /* fix up for NFS-specific error code */
1247 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1248 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1249 status = nfserr_wrong_type;
1256 nfsd_file_put(*dst);
1259 nfsd_file_put(*src);
1265 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1266 union nfsd4_op_u *u)
1268 struct nfsd4_clone *clone = &u->clone;
1269 struct nfsd_file *src, *dst;
1272 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1273 &clone->cl_dst_stateid, &dst);
1277 status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos,
1278 dst, clone->cl_dst_pos, clone->cl_count,
1279 EX_ISSYNC(cstate->current_fh.fh_export));
1287 static void nfs4_put_copy(struct nfsd4_copy *copy)
1289 if (!refcount_dec_and_test(©->refcount))
1291 kfree(copy->cp_src);
1295 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1297 if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags))
1298 kthread_stop(copy->copy_task);
1299 nfs4_put_copy(copy);
1302 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1304 struct nfsd4_copy *copy = NULL;
1306 spin_lock(&clp->async_lock);
1307 if (!list_empty(&clp->async_copies)) {
1308 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1310 refcount_inc(©->refcount);
1312 spin_unlock(&clp->async_lock);
1316 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1318 struct nfsd4_copy *copy;
1320 while ((copy = nfsd4_get_copy(clp)) != NULL)
1321 nfsd4_stop_copy(copy);
1323 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
1325 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1326 struct nfs_fh *src_fh,
1327 nfs4_stateid *stateid);
1328 extern void nfs42_ssc_close(struct file *filep);
1330 extern void nfs_sb_deactive(struct super_block *sb);
1332 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1335 * setup a work entry in the ssc delayed unmount list.
1337 static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
1338 struct nfsd4_ssc_umount_item **nsui,
1339 struct svc_rqst *rqstp)
1341 struct nfsd4_ssc_umount_item *ni = NULL;
1342 struct nfsd4_ssc_umount_item *work = NULL;
1343 struct nfsd4_ssc_umount_item *tmp;
1348 work = kzalloc(sizeof(*work), GFP_KERNEL);
1350 spin_lock(&nn->nfsd_ssc_lock);
1351 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1352 if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
1355 if (ni->nsui_busy) {
1356 /* wait - and try again */
1357 prepare_to_wait(&nn->nfsd_ssc_waitq, &wait, TASK_IDLE);
1358 spin_unlock(&nn->nfsd_ssc_lock);
1360 /* allow 20secs for mount/unmount for now - revisit */
1361 if (svc_thread_should_stop(rqstp) ||
1362 (schedule_timeout(20*HZ) == 0)) {
1363 finish_wait(&nn->nfsd_ssc_waitq, &wait);
1365 return nfserr_eagain;
1367 finish_wait(&nn->nfsd_ssc_waitq, &wait);
1371 refcount_inc(&ni->nsui_refcnt);
1372 spin_unlock(&nn->nfsd_ssc_lock);
1375 /* return vfsmount in (*nsui)->nsui_vfsmount */
1379 strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
1380 refcount_set(&work->nsui_refcnt, 2);
1381 work->nsui_busy = true;
1382 list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
1385 status = nfserr_resource;
1386 spin_unlock(&nn->nfsd_ssc_lock);
1390 static void nfsd4_ssc_update_dul(struct nfsd_net *nn,
1391 struct nfsd4_ssc_umount_item *nsui,
1392 struct vfsmount *ss_mnt)
1394 spin_lock(&nn->nfsd_ssc_lock);
1395 nsui->nsui_vfsmount = ss_mnt;
1396 nsui->nsui_busy = false;
1397 wake_up_all(&nn->nfsd_ssc_waitq);
1398 spin_unlock(&nn->nfsd_ssc_lock);
1401 static void nfsd4_ssc_cancel_dul(struct nfsd_net *nn,
1402 struct nfsd4_ssc_umount_item *nsui)
1404 spin_lock(&nn->nfsd_ssc_lock);
1405 list_del(&nsui->nsui_list);
1406 wake_up_all(&nn->nfsd_ssc_waitq);
1407 spin_unlock(&nn->nfsd_ssc_lock);
1412 * Support one copy source server for now.
1415 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1416 struct nfsd4_ssc_umount_item **nsui)
1418 struct file_system_type *type;
1419 struct vfsmount *ss_mnt;
1420 struct nfs42_netaddr *naddr;
1421 struct sockaddr_storage tmp_addr;
1422 size_t tmp_addrlen, match_netid_len = 3;
1423 char *startsep = "", *endsep = "", *match_netid = "tcp";
1424 char *ipaddr, *dev_name, *raw_data;
1426 __be32 status = nfserr_inval;
1427 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1429 naddr = &nss->u.nl4_addr;
1430 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1432 (struct sockaddr *)&tmp_addr,
1435 if (tmp_addrlen == 0)
1438 if (tmp_addr.ss_family == AF_INET6) {
1441 match_netid = "tcp6";
1442 match_netid_len = 4;
1445 if (naddr->netid_len != match_netid_len ||
1446 strncmp(naddr->netid, match_netid, naddr->netid_len))
1449 /* Construct the raw data for the vfs_kern_mount call */
1450 len = RPC_MAX_ADDRBUFLEN + 1;
1451 ipaddr = kzalloc(len, GFP_KERNEL);
1455 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1457 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1459 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1460 raw_data = kzalloc(raw_len, GFP_KERNEL);
1462 goto out_free_ipaddr;
1464 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1466 status = nfserr_nodev;
1467 type = get_fs_type("nfs");
1469 goto out_free_rawdata;
1471 /* Set the server:<export> for the vfs_kern_mount call */
1472 dev_name = kzalloc(len + 5, GFP_KERNEL);
1474 goto out_free_rawdata;
1475 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1477 status = nfsd4_ssc_setup_dul(nn, ipaddr, nsui, rqstp);
1479 goto out_free_devname;
1480 if ((*nsui)->nsui_vfsmount)
1483 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1484 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1485 module_put(type->owner);
1486 if (IS_ERR(ss_mnt)) {
1487 status = nfserr_nodev;
1488 nfsd4_ssc_cancel_dul(nn, *nsui);
1489 goto out_free_devname;
1491 nfsd4_ssc_update_dul(nn, *nsui, ss_mnt);
1506 * Verify COPY destination stateid.
1508 * Connect to the source server with NFSv4.1.
1509 * Create the source struct file for nfsd_copy_range.
1510 * Called with COPY cstate:
1511 * SAVED_FH: source filehandle
1512 * CURRENT_FH: destination filehandle
1515 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1516 struct nfsd4_compound_state *cstate,
1517 struct nfsd4_copy *copy)
1519 struct svc_fh *s_fh = NULL;
1520 stateid_t *s_stid = ©->cp_src_stateid;
1521 __be32 status = nfserr_inval;
1523 /* Verify the destination stateid and set dst struct file*/
1524 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1525 ©->cp_dst_stateid,
1526 WR_STATE, ©->nf_dst, NULL);
1530 status = nfsd4_interssc_connect(copy->cp_src, rqstp, ©->ss_nsui);
1534 s_fh = &cstate->save_fh;
1536 copy->c_fh.size = s_fh->fh_handle.fh_size;
1537 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
1538 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1539 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1540 sizeof(stateid_opaque_t));
1548 nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
1549 struct nfsd_file *dst)
1551 struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
1552 long timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
1554 nfs42_ssc_close(filp);
1557 spin_lock(&nn->nfsd_ssc_lock);
1558 list_del(&nsui->nsui_list);
1560 * vfsmount can be shared by multiple exports,
1561 * decrement refcnt. If the count drops to 1 it
1562 * will be unmounted when nsui_expire expires.
1564 refcount_dec(&nsui->nsui_refcnt);
1565 nsui->nsui_expire = jiffies + timeout;
1566 list_add_tail(&nsui->nsui_list, &nn->nfsd_ssc_mount_list);
1567 spin_unlock(&nn->nfsd_ssc_lock);
1570 #else /* CONFIG_NFSD_V4_2_INTER_SSC */
1573 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1574 struct nfsd4_compound_state *cstate,
1575 struct nfsd4_copy *copy)
1577 return nfserr_inval;
1581 nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
1582 struct nfsd_file *dst)
1586 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1587 struct nfs_fh *src_fh,
1588 nfs4_stateid *stateid)
1592 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1595 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1596 struct nfsd4_compound_state *cstate,
1597 struct nfsd4_copy *copy)
1599 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1600 ©->nf_src, ©->cp_dst_stateid,
1604 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1606 struct nfsd4_cb_offload *cbo =
1607 container_of(cb, struct nfsd4_cb_offload, co_cb);
1612 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1613 struct rpc_task *task)
1615 struct nfsd4_cb_offload *cbo =
1616 container_of(cb, struct nfsd4_cb_offload, co_cb);
1618 trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task);
1622 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1623 .release = nfsd4_cb_offload_release,
1624 .done = nfsd4_cb_offload_done
1627 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1629 copy->cp_res.wr_stable_how =
1630 test_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags) ?
1631 NFS_FILE_SYNC : NFS_UNSTABLE;
1632 nfsd4_copy_set_sync(copy, sync);
1633 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1636 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
1641 ssize_t bytes_copied = 0;
1642 u64 bytes_total = copy->cp_count;
1643 u64 src_pos = copy->cp_src_pos;
1644 u64 dst_pos = copy->cp_dst_pos;
1648 /* See RFC 7862 p.67: */
1649 if (bytes_total == 0)
1650 bytes_total = ULLONG_MAX;
1652 /* Only async copies can be stopped here */
1653 if (kthread_should_stop())
1655 bytes_copied = nfsd_copy_file_range(src, src_pos, dst, dst_pos,
1657 if (bytes_copied <= 0)
1659 bytes_total -= bytes_copied;
1660 copy->cp_res.wr_bytes_written += bytes_copied;
1661 src_pos += bytes_copied;
1662 dst_pos += bytes_copied;
1663 } while (bytes_total > 0 && nfsd4_copy_is_async(copy));
1664 /* for a non-zero asynchronous copy do a commit of data */
1665 if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
1666 since = READ_ONCE(dst->f_wb_err);
1667 end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1;
1668 status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0);
1670 status = filemap_check_wb_err(dst->f_mapping, since);
1672 set_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags);
1674 return bytes_copied;
1677 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
1678 struct file *src, struct file *dst,
1684 bytes = _nfsd_copy_file_range(copy, dst, src);
1686 /* for async copy, we ignore the error, client can always retry
1689 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1690 status = nfserrno(bytes);
1692 nfsd4_init_copy_res(copy, sync);
1698 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1700 dst->cp_src_pos = src->cp_src_pos;
1701 dst->cp_dst_pos = src->cp_dst_pos;
1702 dst->cp_count = src->cp_count;
1703 dst->cp_flags = src->cp_flags;
1704 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1705 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1706 dst->cp_clp = src->cp_clp;
1707 dst->nf_dst = nfsd_file_get(src->nf_dst);
1708 /* for inter, nf_src doesn't exist yet */
1709 if (!nfsd4_ssc_is_inter(src))
1710 dst->nf_src = nfsd_file_get(src->nf_src);
1712 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1713 memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server));
1714 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1715 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1716 dst->ss_nsui = src->ss_nsui;
1719 static void release_copy_files(struct nfsd4_copy *copy)
1722 nfsd_file_put(copy->nf_src);
1724 nfsd_file_put(copy->nf_dst);
1727 static void cleanup_async_copy(struct nfsd4_copy *copy)
1729 nfs4_free_copy_state(copy);
1730 release_copy_files(copy);
1732 spin_lock(©->cp_clp->async_lock);
1733 if (!list_empty(©->copies))
1734 list_del_init(©->copies);
1735 spin_unlock(©->cp_clp->async_lock);
1737 nfs4_put_copy(copy);
1740 static void nfsd4_send_cb_offload(struct nfsd4_copy *copy)
1742 struct nfsd4_cb_offload *cbo;
1744 cbo = kzalloc(sizeof(*cbo), GFP_KERNEL);
1748 memcpy(&cbo->co_res, ©->cp_res, sizeof(copy->cp_res));
1749 memcpy(&cbo->co_fh, ©->fh, sizeof(copy->fh));
1750 cbo->co_nfserr = copy->nfserr;
1752 nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops,
1753 NFSPROC4_CLNT_CB_OFFLOAD);
1754 trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid,
1755 &cbo->co_fh, copy->cp_count, copy->nfserr);
1756 nfsd4_run_cb(&cbo->co_cb);
1760 * nfsd4_do_async_copy - kthread function for background server-side COPY
1761 * @data: arguments for COPY operation
1764 * %0: Copy operation is done.
1766 static int nfsd4_do_async_copy(void *data)
1768 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1770 trace_nfsd_copy_do_async(copy);
1771 if (nfsd4_ssc_is_inter(copy)) {
1774 filp = nfs42_ssc_open(copy->ss_nsui->nsui_vfsmount,
1775 ©->c_fh, ©->stateid);
1777 switch (PTR_ERR(filp)) {
1779 copy->nfserr = nfserr_wrong_type;
1782 copy->nfserr = nfserr_offload_denied;
1784 /* ss_mnt will be unmounted by the laundromat */
1787 copy->nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file,
1789 nfsd4_cleanup_inter_ssc(copy->ss_nsui, filp, copy->nf_dst);
1791 copy->nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
1792 copy->nf_dst->nf_file, false);
1796 set_bit(NFSD4_COPY_F_COMPLETED, ©->cp_flags);
1797 nfsd4_send_cb_offload(copy);
1798 cleanup_async_copy(copy);
1803 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1804 union nfsd4_op_u *u)
1806 struct nfsd4_copy *copy = &u->copy;
1808 struct nfsd4_copy *async_copy = NULL;
1811 * Currently, async COPY is not reliable. Force all COPY
1812 * requests to be synchronous to avoid client application
1813 * hangs waiting for COPY completion.
1815 nfsd4_copy_set_sync(copy, true);
1817 copy->cp_clp = cstate->clp;
1818 if (nfsd4_ssc_is_inter(copy)) {
1819 trace_nfsd_copy_inter(copy);
1820 if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
1821 status = nfserr_notsupp;
1824 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy);
1826 trace_nfsd_copy_done(copy, status);
1827 return nfserr_offload_denied;
1830 trace_nfsd_copy_intra(copy);
1831 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1833 trace_nfsd_copy_done(copy, status);
1838 memcpy(©->fh, &cstate->current_fh.fh_handle,
1839 sizeof(struct knfsd_fh));
1840 if (nfsd4_copy_is_async(copy)) {
1841 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1843 status = nfserrno(-ENOMEM);
1844 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1847 INIT_LIST_HEAD(&async_copy->copies);
1848 refcount_set(&async_copy->refcount, 1);
1849 async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL);
1850 if (!async_copy->cp_src)
1852 if (!nfs4_init_copy_state(nn, copy))
1854 memcpy(©->cp_res.cb_stateid, ©->cp_stateid.cs_stid,
1855 sizeof(copy->cp_res.cb_stateid));
1856 dup_copy_fields(copy, async_copy);
1857 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1858 async_copy, "%s", "copy thread");
1859 if (IS_ERR(async_copy->copy_task))
1861 spin_lock(&async_copy->cp_clp->async_lock);
1862 list_add(&async_copy->copies,
1863 &async_copy->cp_clp->async_copies);
1864 spin_unlock(&async_copy->cp_clp->async_lock);
1865 wake_up_process(async_copy->copy_task);
1868 status = nfsd4_do_copy(copy, copy->nf_src->nf_file,
1869 copy->nf_dst->nf_file, true);
1872 trace_nfsd_copy_done(copy, status);
1873 release_copy_files(copy);
1876 if (nfsd4_ssc_is_inter(copy)) {
1878 * Source's vfsmount of inter-copy will be unmounted
1879 * by the laundromat. Use copy instead of async_copy
1880 * since async_copy->ss_nsui might not be set yet.
1882 refcount_dec(©->ss_nsui->nsui_refcnt);
1885 cleanup_async_copy(async_copy);
1886 status = nfserrno(-ENOMEM);
1890 static struct nfsd4_copy *
1891 find_async_copy_locked(struct nfs4_client *clp, stateid_t *stateid)
1893 struct nfsd4_copy *copy;
1895 lockdep_assert_held(&clp->async_lock);
1897 list_for_each_entry(copy, &clp->async_copies, copies) {
1898 if (memcmp(©->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE))
1905 static struct nfsd4_copy *
1906 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1908 struct nfsd4_copy *copy;
1910 spin_lock(&clp->async_lock);
1911 copy = find_async_copy_locked(clp, stateid);
1913 refcount_inc(©->refcount);
1914 spin_unlock(&clp->async_lock);
1919 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1920 struct nfsd4_compound_state *cstate,
1921 union nfsd4_op_u *u)
1923 struct nfsd4_offload_status *os = &u->offload_status;
1924 struct nfsd4_copy *copy;
1925 struct nfs4_client *clp = cstate->clp;
1927 copy = find_async_copy(clp, &os->stateid);
1929 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1931 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1933 nfsd4_stop_copy(copy);
1939 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1940 union nfsd4_op_u *u)
1942 struct nfsd4_copy_notify *cn = &u->copy_notify;
1944 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1945 struct nfs4_stid *stid;
1946 struct nfs4_cpntf_state *cps;
1947 struct nfs4_client *clp = cstate->clp;
1949 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1950 &cn->cpn_src_stateid, RD_STATE, NULL,
1955 cn->cpn_lease_time.tv_sec = nn->nfsd4_lease;
1956 cn->cpn_lease_time.tv_nsec = 0;
1958 status = nfserrno(-ENOMEM);
1959 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1962 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t));
1963 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1964 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1966 /* For now, only return one server address in cpn_src, the
1967 * address used by the client to connect to this server.
1969 cn->cpn_src->nl4_type = NL4_NETADDR;
1970 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1971 &cn->cpn_src->u.nl4_addr);
1972 WARN_ON_ONCE(status);
1974 nfs4_put_cpntf_state(nn, cps);
1978 nfs4_put_stid(stid);
1983 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1984 struct nfsd4_fallocate *fallocate, int flags)
1987 struct nfsd_file *nf;
1989 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1990 &fallocate->falloc_stateid,
1991 WR_STATE, &nf, NULL);
1992 if (status != nfs_ok)
1995 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1996 fallocate->falloc_offset,
1997 fallocate->falloc_length,
2004 nfsd4_offload_status(struct svc_rqst *rqstp,
2005 struct nfsd4_compound_state *cstate,
2006 union nfsd4_op_u *u)
2008 struct nfsd4_offload_status *os = &u->offload_status;
2009 __be32 status = nfs_ok;
2010 struct nfsd4_copy *copy;
2011 struct nfs4_client *clp = cstate->clp;
2013 os->completed = false;
2014 spin_lock(&clp->async_lock);
2015 copy = find_async_copy_locked(clp, &os->stateid);
2017 os->count = copy->cp_res.wr_bytes_written;
2018 if (test_bit(NFSD4_COPY_F_COMPLETED, ©->cp_flags)) {
2019 os->completed = true;
2020 os->status = copy->nfserr;
2023 status = nfserr_bad_stateid;
2024 spin_unlock(&clp->async_lock);
2030 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2031 union nfsd4_op_u *u)
2033 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
2037 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2038 union nfsd4_op_u *u)
2040 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
2041 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
2045 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2046 union nfsd4_op_u *u)
2048 struct nfsd4_seek *seek = &u->seek;
2051 struct nfsd_file *nf;
2053 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
2054 &seek->seek_stateid,
2055 RD_STATE, &nf, NULL);
2059 switch (seek->seek_whence) {
2060 case NFS4_CONTENT_DATA:
2063 case NFS4_CONTENT_HOLE:
2067 status = nfserr_union_notsupp;
2072 * Note: This call does change file->f_pos, but nothing in NFSD
2073 * should ever file->f_pos.
2075 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
2076 if (seek->seek_pos < 0)
2077 status = nfserrno(seek->seek_pos);
2078 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
2079 seek->seek_eof = true;
2086 /* This routine never returns NFS_OK! If there are no other errors, it
2087 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
2088 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
2089 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
2092 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2093 struct nfsd4_verify *verify)
2099 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
2103 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
2107 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
2108 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
2109 return nfserr_inval;
2110 if (verify->ve_attrlen & 3)
2111 return nfserr_inval;
2114 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
2116 count = 4 + (verify->ve_attrlen >> 2);
2117 buf = kmalloc(count << 2, GFP_KERNEL);
2119 return nfserr_jukebox;
2122 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
2123 cstate->current_fh.fh_export,
2124 cstate->current_fh.fh_dentry,
2128 * If nfsd4_encode_fattr() ran out of space, assume that's because
2129 * the attributes are longer (hence different) than those given:
2131 if (status == nfserr_resource)
2132 status = nfserr_not_same;
2137 p = buf + 1 + ntohl(buf[0]);
2138 status = nfserr_not_same;
2139 if (ntohl(*p++) != verify->ve_attrlen)
2141 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
2142 status = nfserr_same;
2150 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2151 union nfsd4_op_u *u)
2155 status = _nfsd4_verify(rqstp, cstate, &u->verify);
2156 return status == nfserr_not_same ? nfs_ok : status;
2160 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2161 union nfsd4_op_u *u)
2165 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
2166 return status == nfserr_same ? nfs_ok : status;
2170 nfsd4_get_dir_delegation(struct svc_rqst *rqstp,
2171 struct nfsd4_compound_state *cstate,
2172 union nfsd4_op_u *u)
2174 struct nfsd4_get_dir_delegation *gdd = &u->get_dir_delegation;
2177 * RFC 8881, section 18.39.3 says:
2179 * "The server may refuse to grant the delegation. In that case, the
2180 * server will return NFS4ERR_DIRDELEG_UNAVAIL."
2182 * This is sub-optimal, since it means that the server would need to
2183 * abort compound processing just because the delegation wasn't
2184 * available. RFC8881bis should change this to allow the server to
2185 * return NFS4_OK with a non-fatal status of GDD4_UNAVAIL in this
2188 gdd->gddrnf_status = GDD4_UNAVAIL;
2192 #ifdef CONFIG_NFSD_PNFS
2193 static const struct nfsd4_layout_ops *
2194 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
2196 if (!exp->ex_layout_types) {
2197 dprintk("%s: export does not support pNFS\n", __func__);
2201 if (layout_type >= LAYOUT_TYPE_MAX ||
2202 !(exp->ex_layout_types & (1 << layout_type))) {
2203 dprintk("%s: layout type %d not supported\n",
2204 __func__, layout_type);
2208 return nfsd4_layout_ops[layout_type];
2212 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
2213 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2215 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
2216 const struct nfsd4_layout_ops *ops;
2217 struct nfsd4_deviceid_map *map;
2218 struct svc_export *exp;
2221 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
2223 gdp->gd_layout_type,
2224 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
2227 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
2229 dprintk("%s: couldn't find device ID to export mapping!\n",
2231 return nfserr_noent;
2234 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
2236 dprintk("%s: could not find device id\n", __func__);
2237 return nfserr_noent;
2240 nfserr = nfserr_layoutunavailable;
2241 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
2246 if (gdp->gd_maxcount != 0) {
2247 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
2248 rqstp, cstate->clp, gdp);
2251 gdp->gd_notify_types &= ops->notify_types;
2258 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
2260 kfree(u->getdeviceinfo.gd_device);
2264 nfsd4_layoutget(struct svc_rqst *rqstp,
2265 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2267 struct nfsd4_layoutget *lgp = &u->layoutget;
2268 struct svc_fh *current_fh = &cstate->current_fh;
2269 const struct nfsd4_layout_ops *ops;
2270 struct nfs4_layout_stateid *ls;
2272 int accmode = NFSD_MAY_READ_IF_EXEC;
2274 switch (lgp->lg_seg.iomode) {
2276 accmode |= NFSD_MAY_READ;
2279 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
2282 dprintk("%s: invalid iomode %d\n",
2283 __func__, lgp->lg_seg.iomode);
2284 nfserr = nfserr_badiomode;
2288 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
2292 nfserr = nfserr_layoutunavailable;
2293 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
2298 * Verify minlength and range as per RFC5661:
2299 * o If loga_length is less than loga_minlength,
2300 * the metadata server MUST return NFS4ERR_INVAL.
2301 * o If the sum of loga_offset and loga_minlength exceeds
2302 * NFS4_UINT64_MAX, and loga_minlength is not
2303 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
2304 * o If the sum of loga_offset and loga_length exceeds
2305 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
2306 * the error NFS4ERR_INVAL MUST result.
2308 nfserr = nfserr_inval;
2309 if (lgp->lg_seg.length < lgp->lg_minlength ||
2310 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
2311 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
2312 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
2313 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
2315 if (lgp->lg_seg.length == 0)
2318 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
2319 true, lgp->lg_layout_type, &ls);
2321 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
2325 nfserr = nfserr_recallconflict;
2326 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
2329 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
2334 nfserr = nfsd4_insert_layout(lgp, ls);
2337 mutex_unlock(&ls->ls_mutex);
2338 nfs4_put_stid(&ls->ls_stid);
2344 nfsd4_layoutget_release(union nfsd4_op_u *u)
2346 kfree(u->layoutget.lg_content);
2350 nfsd4_layoutcommit(struct svc_rqst *rqstp,
2351 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2353 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
2354 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
2355 struct svc_fh *current_fh = &cstate->current_fh;
2356 const struct nfsd4_layout_ops *ops;
2357 loff_t new_size = lcp->lc_last_wr + 1;
2358 struct inode *inode;
2359 struct nfs4_layout_stateid *ls;
2362 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2366 nfserr = nfserr_layoutunavailable;
2367 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2370 inode = d_inode(current_fh->fh_dentry);
2372 nfserr = nfserr_inval;
2373 if (new_size <= seg->offset) {
2374 dprintk("pnfsd: last write before layout segment\n");
2377 if (new_size > seg->offset + seg->length) {
2378 dprintk("pnfsd: last write beyond layout segment\n");
2381 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2382 dprintk("pnfsd: layoutcommit beyond EOF\n");
2386 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2387 false, lcp->lc_layout_type,
2390 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2391 /* fixup error code as per RFC5661 */
2392 if (nfserr == nfserr_bad_stateid)
2393 nfserr = nfserr_badlayout;
2397 /* LAYOUTCOMMIT does not require any serialization */
2398 mutex_unlock(&ls->ls_mutex);
2400 if (new_size > i_size_read(inode)) {
2401 lcp->lc_size_chg = true;
2402 lcp->lc_newsize = new_size;
2404 lcp->lc_size_chg = false;
2407 nfserr = ops->proc_layoutcommit(inode, lcp);
2408 nfs4_put_stid(&ls->ls_stid);
2414 nfsd4_layoutreturn(struct svc_rqst *rqstp,
2415 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2417 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2418 struct svc_fh *current_fh = &cstate->current_fh;
2421 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2425 nfserr = nfserr_layoutunavailable;
2426 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2429 switch (lrp->lr_seg.iomode) {
2435 dprintk("%s: invalid iomode %d\n", __func__,
2436 lrp->lr_seg.iomode);
2437 nfserr = nfserr_inval;
2441 switch (lrp->lr_return_type) {
2443 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2447 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2450 dprintk("%s: invalid return_type %d\n", __func__,
2451 lrp->lr_return_type);
2452 nfserr = nfserr_inval;
2458 #endif /* CONFIG_NFSD_PNFS */
2461 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2462 union nfsd4_op_u *u)
2464 struct nfsd4_getxattr *getxattr = &u->getxattr;
2466 return nfsd_getxattr(rqstp, &cstate->current_fh,
2467 getxattr->getxa_name, &getxattr->getxa_buf,
2468 &getxattr->getxa_len);
2472 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2473 union nfsd4_op_u *u)
2475 struct nfsd4_setxattr *setxattr = &u->setxattr;
2478 if (opens_in_grace(SVC_NET(rqstp)))
2479 return nfserr_grace;
2481 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2482 setxattr->setxa_buf, setxattr->setxa_len,
2483 setxattr->setxa_flags);
2486 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2492 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2493 union nfsd4_op_u *u)
2496 * Get the entire list, then copy out only the user attributes
2497 * in the encode function.
2499 return nfsd_listxattr(rqstp, &cstate->current_fh,
2500 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2504 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2505 union nfsd4_op_u *u)
2507 struct nfsd4_removexattr *removexattr = &u->removexattr;
2510 if (opens_in_grace(SVC_NET(rqstp)))
2511 return nfserr_grace;
2513 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2514 removexattr->rmxa_name);
2517 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2526 nfsd4_proc_null(struct svc_rqst *rqstp)
2531 static inline void nfsd4_increment_op_stats(struct nfsd_net *nn, u32 opnum)
2533 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2534 percpu_counter_inc(&nn->counter[NFSD_STATS_NFS4_OP(opnum)]);
2537 static const struct nfsd4_operation nfsd4_ops[];
2539 static const char *nfsd4_op_name(unsigned opnum);
2542 * Enforce NFSv4.1 COMPOUND ordering rules:
2544 * Also note, enforced elsewhere:
2545 * - SEQUENCE other than as first op results in
2546 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2547 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2548 * (Enforced in nfsd4_bind_conn_to_session().)
2549 * - DESTROY_SESSION must be the final operation in a compound, if
2550 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2551 * (Enforced in nfsd4_destroy_session().)
2553 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2555 struct nfsd4_op *first_op = &args->ops[0];
2557 /* These ordering requirements don't apply to NFSv4.0: */
2558 if (args->minorversion == 0)
2560 /* This is weird, but OK, not our problem: */
2561 if (args->opcnt == 0)
2563 if (first_op->status == nfserr_op_illegal)
2565 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2566 return nfserr_op_not_in_session;
2567 if (first_op->opnum == OP_SEQUENCE)
2570 * So first_op is something allowed outside a session, like
2571 * EXCHANGE_ID; but then it has to be the only op in the
2574 if (args->opcnt != 1)
2575 return nfserr_not_only_op;
2579 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2581 return &nfsd4_ops[op->opnum];
2584 bool nfsd4_cache_this_op(struct nfsd4_op *op)
2586 if (op->opnum == OP_ILLEGAL)
2588 return OPDESC(op)->op_flags & OP_CACHEME;
2591 static bool need_wrongsec_check(struct svc_rqst *rqstp)
2593 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2594 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2595 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2596 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2597 const struct nfsd4_operation *thisd = OPDESC(this);
2598 const struct nfsd4_operation *nextd;
2601 * Most ops check wronsec on our own; only the putfh-like ops
2602 * have special rules.
2604 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2607 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2608 * put-filehandle operation if we're not going to use the
2611 if (argp->opcnt == resp->opcnt)
2613 if (next->opnum == OP_ILLEGAL)
2615 nextd = OPDESC(next);
2617 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2618 * errors themselves as necessary; others should check for them
2621 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2624 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
2626 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2628 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2629 struct nfsd4_copy *copy;
2630 struct nfsd4_putfh *putfh;
2633 /* traverse all operation and if it's a COPY compound, mark the
2634 * source filehandle to skip verification
2636 for (i = 0; i < args->opcnt; i++) {
2638 if (op->opnum == OP_PUTFH)
2640 else if (op->opnum == OP_SAVEFH)
2641 saved_op = current_op;
2642 else if (op->opnum == OP_RESTOREFH)
2643 current_op = saved_op;
2644 else if (op->opnum == OP_COPY) {
2645 copy = (struct nfsd4_copy *)&op->u;
2647 op->status = nfserr_nofilehandle;
2650 putfh = (struct nfsd4_putfh *)&saved_op->u;
2651 if (nfsd4_ssc_is_inter(copy))
2652 putfh->no_verify = true;
2658 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2667 nfsd4_proc_compound(struct svc_rqst *rqstp)
2669 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2670 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2671 struct nfsd4_op *op;
2672 struct nfsd4_compound_state *cstate = &resp->cstate;
2673 struct svc_fh *current_fh = &cstate->current_fh;
2674 struct svc_fh *save_fh = &cstate->save_fh;
2675 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2678 resp->xdr = &rqstp->rq_res_stream;
2679 resp->statusp = resp->xdr->p;
2681 /* reserve space for: NFS status code */
2682 xdr_reserve_space(resp->xdr, XDR_UNIT);
2684 /* reserve space for: taglen, tag, and opcnt */
2685 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
2686 resp->taglen = args->taglen;
2687 resp->tag = args->tag;
2688 resp->rqstp = rqstp;
2689 cstate->minorversion = args->minorversion;
2690 fh_init(current_fh, NFS4_FHSIZE);
2691 fh_init(save_fh, NFS4_FHSIZE);
2693 * Don't use the deferral mechanism for NFSv4; compounds make it
2694 * too hard to avoid non-idempotency problems.
2696 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2699 * According to RFC3010, this takes precedence over all other errors.
2701 status = nfserr_minor_vers_mismatch;
2702 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2705 status = nfs41_check_op_ordering(args);
2708 op->status = status;
2712 check_if_stalefh_allowed(args);
2714 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2716 trace_nfsd_compound(rqstp, args->tag, args->taglen, args->client_opcnt);
2717 while (!status && resp->opcnt < args->opcnt) {
2718 op = &args->ops[resp->opcnt++];
2720 if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
2721 /* If there are still more operations to process,
2722 * stop here and report NFS4ERR_RESOURCE. */
2723 if (cstate->minorversion == 0 &&
2724 args->client_opcnt > resp->opcnt) {
2725 op->status = nfserr_resource;
2731 * The XDR decode routines may have pre-set op->status;
2732 * for example, if there is a miscellaneous XDR error
2733 * it will be set to nfserr_bad_xdr.
2736 if (op->opnum == OP_OPEN)
2737 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2740 if (!current_fh->fh_dentry &&
2741 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2742 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2743 op->status = nfserr_nofilehandle;
2746 } else if (current_fh->fh_export &&
2747 current_fh->fh_export->ex_fslocs.migrated &&
2748 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2749 op->status = nfserr_moved;
2753 fh_clear_pre_post_attrs(current_fh);
2755 /* If op is non-idempotent */
2756 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2758 * Don't execute this op if we couldn't encode a
2761 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2763 * Plus if there's another operation, make sure
2764 * we'll have space to at least encode an error:
2766 if (resp->opcnt < args->opcnt)
2767 plen += COMPOUND_ERR_SLACK_SPACE;
2768 op->status = nfsd4_check_resp_size(resp, plen);
2774 if (op->opdesc->op_get_currentstateid)
2775 op->opdesc->op_get_currentstateid(cstate, &op->u);
2776 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2778 /* Only from SEQUENCE */
2779 if (cstate->status == nfserr_replay_cache) {
2780 dprintk("%s NFS4.1 replay from cache\n", __func__);
2781 status = op->status;
2785 if (op->opdesc->op_set_currentstateid)
2786 op->opdesc->op_set_currentstateid(cstate, &op->u);
2788 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2789 clear_current_stateid(cstate);
2791 if (current_fh->fh_export &&
2792 need_wrongsec_check(rqstp))
2793 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2796 if (op->status == nfserr_replay_me) {
2797 op->replay = &cstate->replay_owner->so_replay;
2798 nfsd4_encode_replay(resp->xdr, op);
2799 status = op->status = op->replay->rp_status;
2801 nfsd4_encode_operation(resp, op);
2802 status = op->status;
2805 trace_nfsd_compound_status(args->client_opcnt, resp->opcnt,
2806 status, nfsd4_op_name(op->opnum));
2808 nfsd4_cstate_clear_replay(cstate);
2809 nfsd4_increment_op_stats(nn, op->opnum);
2814 BUG_ON(cstate->replay_owner);
2816 cstate->status = status;
2817 /* Reset deferral mechanism for RPC deferrals */
2818 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2822 #define op_encode_hdr_size (2)
2823 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2824 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2825 #define op_encode_change_info_maxsz (5)
2826 #define nfs4_fattr_bitmap_maxsz (4)
2828 /* We'll fall back on returning no lockowner if run out of space: */
2829 #define op_encode_lockowner_maxsz (0)
2830 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2832 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2834 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2835 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2836 op_encode_ace_maxsz)
2838 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2841 * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which
2842 * is called before sunrpc sets rq_res.buflen. Thus we have to compute
2843 * the maximum payload size here, based on transport limits and the size
2844 * of the remaining space in the rq_pages array.
2846 static u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
2850 buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
2851 buflen -= rqstp->rq_auth_slack;
2852 buflen -= rqstp->rq_res.head[0].iov_len;
2853 return min_t(u32, buflen, svc_max_payload(rqstp));
2856 static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
2857 const struct nfsd4_op *op)
2859 return (op_encode_hdr_size) * sizeof(__be32);
2862 static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
2863 const struct nfsd4_op *op)
2865 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2868 static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
2869 const struct nfsd4_op *op)
2871 /* ac_supported, ac_resp_access */
2872 return (op_encode_hdr_size + 2)* sizeof(__be32);
2875 static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
2876 const struct nfsd4_op *op)
2878 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2881 static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
2882 const struct nfsd4_op *op)
2884 return (op_encode_hdr_size + op_encode_change_info_maxsz
2885 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2889 * Note since this is an idempotent operation we won't insist on failing
2890 * the op prematurely if the estimate is too large. We may turn off splice
2891 * reads unnecessarily.
2893 static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
2894 const struct nfsd4_op *op)
2896 const u32 *bmap = op->u.getattr.ga_bmval;
2897 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2900 if (bmap0 & FATTR4_WORD0_ACL)
2901 return nfsd4_max_payload(rqstp);
2902 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2903 return nfsd4_max_payload(rqstp);
2905 if (bmap1 & FATTR4_WORD1_OWNER) {
2906 ret += IDMAP_NAMESZ + 4;
2907 bmap1 &= ~FATTR4_WORD1_OWNER;
2909 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2910 ret += IDMAP_NAMESZ + 4;
2911 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2913 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2914 ret += NFS4_FHSIZE + 4;
2915 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2917 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2918 ret += NFS4_MAXLABELLEN + 12;
2919 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2922 * Largest of remaining attributes are 16 bytes (e.g.,
2923 * supported_attributes)
2925 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2926 /* bitmask, length */
2931 static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
2932 const struct nfsd4_op *op)
2934 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2937 static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
2938 const struct nfsd4_op *op)
2940 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2944 static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
2945 const struct nfsd4_op *op)
2947 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2951 static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
2952 const struct nfsd4_op *op)
2954 return (op_encode_hdr_size + op_encode_stateid_maxsz
2955 + op_encode_change_info_maxsz + 1
2956 + nfs4_fattr_bitmap_maxsz
2957 + op_encode_delegation_maxsz) * sizeof(__be32);
2960 static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
2961 const struct nfsd4_op *op)
2963 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
2965 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2968 static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
2969 const struct nfsd4_op *op)
2971 u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
2973 * If we detect that the file changed during hole encoding, then we
2974 * recover by encoding the remaining reply as data. This means we need
2975 * to set aside enough room to encode two data segments.
2977 u32 seg_len = 2 * (1 + 2 + 1);
2979 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2982 static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
2983 const struct nfsd4_op *op)
2985 u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
2987 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2988 XDR_QUADLEN(rlen)) * sizeof(__be32);
2991 static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
2992 const struct nfsd4_op *op)
2994 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2997 static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
2998 const struct nfsd4_op *op)
3000 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3004 static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
3005 const struct nfsd4_op *op)
3007 return (op_encode_hdr_size + op_encode_change_info_maxsz
3008 + op_encode_change_info_maxsz) * sizeof(__be32);
3011 static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
3012 const struct nfsd4_op *op)
3014 return (op_encode_hdr_size
3015 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
3018 static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
3019 const struct nfsd4_op *op)
3021 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
3025 static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
3026 const struct nfsd4_op *op)
3028 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
3031 static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
3032 const struct nfsd4_op *op)
3034 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
3035 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
3038 static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
3039 const struct nfsd4_op *op)
3041 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
3045 static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
3046 const struct nfsd4_op *op)
3048 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
3051 static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
3052 const struct nfsd4_op *op)
3054 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
3055 1 + 1 + /* eir_flags, spr_how */\
3056 4 + /* spo_must_enforce & _allow with bitmap */\
3057 2 + /*eir_server_owner.so_minor_id */\
3058 /* eir_server_owner.so_major_id<> */\
3059 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
3060 /* eir_server_scope<> */\
3061 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
3062 1 + /* eir_server_impl_id array length */\
3063 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
3066 static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
3067 const struct nfsd4_op *op)
3069 return (op_encode_hdr_size + \
3070 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
3071 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
3074 static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
3075 const struct nfsd4_op *op)
3077 return (op_encode_hdr_size + \
3078 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
3079 2 + /* csr_sequence, csr_flags */\
3080 op_encode_channel_attrs_maxsz + \
3081 op_encode_channel_attrs_maxsz) * sizeof(__be32);
3084 static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
3085 const struct nfsd4_op *op)
3087 return (op_encode_hdr_size +
3088 1 /* wr_callback */ +
3089 op_encode_stateid_maxsz /* wr_callback */ +
3091 1 /* wr_committed */ +
3092 op_encode_verifier_maxsz +
3093 1 /* cr_consecutive */ +
3094 1 /* cr_synchronous */) * sizeof(__be32);
3097 static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
3098 const struct nfsd4_op *op)
3100 return (op_encode_hdr_size +
3102 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
3105 static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
3106 const struct nfsd4_op *op)
3108 return (op_encode_hdr_size +
3109 3 /* cnr_lease_time */ +
3110 1 /* We support one cnr_source_server */ +
3111 1 /* cnr_stateid seq */ +
3112 op_encode_stateid_maxsz /* cnr_stateid */ +
3113 1 /* num cnr_source_server*/ +
3116 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
3120 static u32 nfsd4_get_dir_delegation_rsize(const struct svc_rqst *rqstp,
3121 const struct nfsd4_op *op)
3123 return (op_encode_hdr_size +
3124 1 /* gddr_status */ +
3125 op_encode_verifier_maxsz +
3126 op_encode_stateid_maxsz +
3127 2 /* gddr_notification */ +
3128 2 /* gddr_child_attributes */ +
3129 2 /* gddr_dir_attributes */);
3132 #ifdef CONFIG_NFSD_PNFS
3133 static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
3134 const struct nfsd4_op *op)
3136 u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
3138 return (op_encode_hdr_size +
3139 1 /* gd_layout_type*/ +
3141 2 /* gd_notify_types */) * sizeof(__be32);
3145 * At this stage we don't really know what layout driver will handle the request,
3146 * so we need to define an arbitrary upper bound here.
3148 #define MAX_LAYOUT_SIZE 128
3149 static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
3150 const struct nfsd4_op *op)
3152 return (op_encode_hdr_size +
3153 1 /* logr_return_on_close */ +
3154 op_encode_stateid_maxsz +
3155 1 /* nr of layouts */ +
3156 MAX_LAYOUT_SIZE) * sizeof(__be32);
3159 static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
3160 const struct nfsd4_op *op)
3162 return (op_encode_hdr_size +
3163 1 /* locr_newsize */ +
3164 2 /* ns_size */) * sizeof(__be32);
3167 static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
3168 const struct nfsd4_op *op)
3170 return (op_encode_hdr_size +
3171 1 /* lrs_stateid */ +
3172 op_encode_stateid_maxsz) * sizeof(__be32);
3174 #endif /* CONFIG_NFSD_PNFS */
3177 static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
3178 const struct nfsd4_op *op)
3180 return (op_encode_hdr_size + 3) * sizeof(__be32);
3183 static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
3184 const struct nfsd4_op *op)
3186 u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
3188 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
3191 static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
3192 const struct nfsd4_op *op)
3194 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3197 static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
3198 const struct nfsd4_op *op)
3200 u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
3202 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
3205 static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
3206 const struct nfsd4_op *op)
3208 return (op_encode_hdr_size + op_encode_change_info_maxsz)
3213 static const struct nfsd4_operation nfsd4_ops[] = {
3215 .op_func = nfsd4_access,
3216 .op_name = "OP_ACCESS",
3217 .op_rsize_bop = nfsd4_access_rsize,
3220 .op_func = nfsd4_close,
3221 .op_flags = OP_MODIFIES_SOMETHING,
3222 .op_name = "OP_CLOSE",
3223 .op_rsize_bop = nfsd4_status_stateid_rsize,
3224 .op_get_currentstateid = nfsd4_get_closestateid,
3225 .op_set_currentstateid = nfsd4_set_closestateid,
3228 .op_func = nfsd4_commit,
3229 .op_flags = OP_MODIFIES_SOMETHING,
3230 .op_name = "OP_COMMIT",
3231 .op_rsize_bop = nfsd4_commit_rsize,
3234 .op_func = nfsd4_create,
3235 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
3236 .op_name = "OP_CREATE",
3237 .op_rsize_bop = nfsd4_create_rsize,
3239 [OP_DELEGRETURN] = {
3240 .op_func = nfsd4_delegreturn,
3241 .op_flags = OP_MODIFIES_SOMETHING,
3242 .op_name = "OP_DELEGRETURN",
3243 .op_rsize_bop = nfsd4_only_status_rsize,
3244 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
3247 .op_func = nfsd4_getattr,
3248 .op_flags = ALLOWED_ON_ABSENT_FS,
3249 .op_rsize_bop = nfsd4_getattr_rsize,
3250 .op_name = "OP_GETATTR",
3253 .op_func = nfsd4_getfh,
3254 .op_name = "OP_GETFH",
3255 .op_rsize_bop = nfsd4_getfh_rsize,
3258 .op_func = nfsd4_link,
3259 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
3261 .op_name = "OP_LINK",
3262 .op_rsize_bop = nfsd4_link_rsize,
3265 .op_func = nfsd4_lock,
3266 .op_release = nfsd4_lock_release,
3267 .op_flags = OP_MODIFIES_SOMETHING |
3268 OP_NONTRIVIAL_ERROR_ENCODE,
3269 .op_name = "OP_LOCK",
3270 .op_rsize_bop = nfsd4_lock_rsize,
3271 .op_set_currentstateid = nfsd4_set_lockstateid,
3274 .op_func = nfsd4_lockt,
3275 .op_release = nfsd4_lockt_release,
3276 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
3277 .op_name = "OP_LOCKT",
3278 .op_rsize_bop = nfsd4_lock_rsize,
3281 .op_func = nfsd4_locku,
3282 .op_flags = OP_MODIFIES_SOMETHING,
3283 .op_name = "OP_LOCKU",
3284 .op_rsize_bop = nfsd4_status_stateid_rsize,
3285 .op_get_currentstateid = nfsd4_get_lockustateid,
3288 .op_func = nfsd4_lookup,
3289 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3290 .op_name = "OP_LOOKUP",
3291 .op_rsize_bop = nfsd4_only_status_rsize,
3294 .op_func = nfsd4_lookupp,
3295 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3296 .op_name = "OP_LOOKUPP",
3297 .op_rsize_bop = nfsd4_only_status_rsize,
3300 .op_func = nfsd4_nverify,
3301 .op_name = "OP_NVERIFY",
3302 .op_rsize_bop = nfsd4_only_status_rsize,
3305 .op_func = nfsd4_open,
3306 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3307 .op_name = "OP_OPEN",
3308 .op_rsize_bop = nfsd4_open_rsize,
3309 .op_set_currentstateid = nfsd4_set_openstateid,
3311 [OP_OPEN_CONFIRM] = {
3312 .op_func = nfsd4_open_confirm,
3313 .op_flags = OP_MODIFIES_SOMETHING,
3314 .op_name = "OP_OPEN_CONFIRM",
3315 .op_rsize_bop = nfsd4_status_stateid_rsize,
3317 [OP_OPEN_DOWNGRADE] = {
3318 .op_func = nfsd4_open_downgrade,
3319 .op_flags = OP_MODIFIES_SOMETHING,
3320 .op_name = "OP_OPEN_DOWNGRADE",
3321 .op_rsize_bop = nfsd4_status_stateid_rsize,
3322 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
3323 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
3326 .op_func = nfsd4_putfh,
3327 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3328 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3329 .op_name = "OP_PUTFH",
3330 .op_rsize_bop = nfsd4_only_status_rsize,
3333 .op_func = nfsd4_putrootfh,
3334 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3335 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3336 .op_name = "OP_PUTPUBFH",
3337 .op_rsize_bop = nfsd4_only_status_rsize,
3340 .op_func = nfsd4_putrootfh,
3341 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3342 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3343 .op_name = "OP_PUTROOTFH",
3344 .op_rsize_bop = nfsd4_only_status_rsize,
3347 .op_func = nfsd4_read,
3348 .op_release = nfsd4_read_release,
3349 .op_name = "OP_READ",
3350 .op_rsize_bop = nfsd4_read_rsize,
3351 .op_get_currentstateid = nfsd4_get_readstateid,
3354 .op_func = nfsd4_readdir,
3355 .op_name = "OP_READDIR",
3356 .op_rsize_bop = nfsd4_readdir_rsize,
3359 .op_func = nfsd4_readlink,
3360 .op_name = "OP_READLINK",
3361 .op_rsize_bop = nfsd4_readlink_rsize,
3364 .op_func = nfsd4_remove,
3365 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3366 .op_name = "OP_REMOVE",
3367 .op_rsize_bop = nfsd4_remove_rsize,
3370 .op_func = nfsd4_rename,
3371 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3372 .op_name = "OP_RENAME",
3373 .op_rsize_bop = nfsd4_rename_rsize,
3376 .op_func = nfsd4_renew,
3377 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3378 | OP_MODIFIES_SOMETHING,
3379 .op_name = "OP_RENEW",
3380 .op_rsize_bop = nfsd4_only_status_rsize,
3384 .op_func = nfsd4_restorefh,
3385 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3386 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
3387 .op_name = "OP_RESTOREFH",
3388 .op_rsize_bop = nfsd4_only_status_rsize,
3391 .op_func = nfsd4_savefh,
3392 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3393 .op_name = "OP_SAVEFH",
3394 .op_rsize_bop = nfsd4_only_status_rsize,
3397 .op_func = nfsd4_secinfo,
3398 .op_release = nfsd4_secinfo_release,
3399 .op_flags = OP_HANDLES_WRONGSEC,
3400 .op_name = "OP_SECINFO",
3401 .op_rsize_bop = nfsd4_secinfo_rsize,
3404 .op_func = nfsd4_setattr,
3405 .op_name = "OP_SETATTR",
3406 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3407 | OP_NONTRIVIAL_ERROR_ENCODE,
3408 .op_rsize_bop = nfsd4_setattr_rsize,
3409 .op_get_currentstateid = nfsd4_get_setattrstateid,
3411 [OP_SETCLIENTID] = {
3412 .op_func = nfsd4_setclientid,
3413 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3414 | OP_MODIFIES_SOMETHING | OP_CACHEME
3415 | OP_NONTRIVIAL_ERROR_ENCODE,
3416 .op_name = "OP_SETCLIENTID",
3417 .op_rsize_bop = nfsd4_setclientid_rsize,
3419 [OP_SETCLIENTID_CONFIRM] = {
3420 .op_func = nfsd4_setclientid_confirm,
3421 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3422 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3423 .op_name = "OP_SETCLIENTID_CONFIRM",
3424 .op_rsize_bop = nfsd4_only_status_rsize,
3427 .op_func = nfsd4_verify,
3428 .op_name = "OP_VERIFY",
3429 .op_rsize_bop = nfsd4_only_status_rsize,
3432 .op_func = nfsd4_write,
3433 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3434 .op_name = "OP_WRITE",
3435 .op_rsize_bop = nfsd4_write_rsize,
3436 .op_get_currentstateid = nfsd4_get_writestateid,
3438 [OP_RELEASE_LOCKOWNER] = {
3439 .op_func = nfsd4_release_lockowner,
3440 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3441 | OP_MODIFIES_SOMETHING,
3442 .op_name = "OP_RELEASE_LOCKOWNER",
3443 .op_rsize_bop = nfsd4_only_status_rsize,
3446 /* NFSv4.1 operations */
3447 [OP_EXCHANGE_ID] = {
3448 .op_func = nfsd4_exchange_id,
3449 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3450 | OP_MODIFIES_SOMETHING,
3451 .op_name = "OP_EXCHANGE_ID",
3452 .op_rsize_bop = nfsd4_exchange_id_rsize,
3454 [OP_BACKCHANNEL_CTL] = {
3455 .op_func = nfsd4_backchannel_ctl,
3456 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3457 .op_name = "OP_BACKCHANNEL_CTL",
3458 .op_rsize_bop = nfsd4_only_status_rsize,
3460 [OP_BIND_CONN_TO_SESSION] = {
3461 .op_func = nfsd4_bind_conn_to_session,
3462 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3463 | OP_MODIFIES_SOMETHING,
3464 .op_name = "OP_BIND_CONN_TO_SESSION",
3465 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3467 [OP_CREATE_SESSION] = {
3468 .op_func = nfsd4_create_session,
3469 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3470 | OP_MODIFIES_SOMETHING,
3471 .op_name = "OP_CREATE_SESSION",
3472 .op_rsize_bop = nfsd4_create_session_rsize,
3474 [OP_DESTROY_SESSION] = {
3475 .op_func = nfsd4_destroy_session,
3476 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3477 | OP_MODIFIES_SOMETHING,
3478 .op_name = "OP_DESTROY_SESSION",
3479 .op_rsize_bop = nfsd4_only_status_rsize,
3482 .op_func = nfsd4_sequence,
3483 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3484 .op_name = "OP_SEQUENCE",
3485 .op_rsize_bop = nfsd4_sequence_rsize,
3487 [OP_DESTROY_CLIENTID] = {
3488 .op_func = nfsd4_destroy_clientid,
3489 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3490 | OP_MODIFIES_SOMETHING,
3491 .op_name = "OP_DESTROY_CLIENTID",
3492 .op_rsize_bop = nfsd4_only_status_rsize,
3494 [OP_RECLAIM_COMPLETE] = {
3495 .op_func = nfsd4_reclaim_complete,
3496 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3497 .op_name = "OP_RECLAIM_COMPLETE",
3498 .op_rsize_bop = nfsd4_only_status_rsize,
3500 [OP_SECINFO_NO_NAME] = {
3501 .op_func = nfsd4_secinfo_no_name,
3502 .op_release = nfsd4_secinfo_no_name_release,
3503 .op_flags = OP_HANDLES_WRONGSEC,
3504 .op_name = "OP_SECINFO_NO_NAME",
3505 .op_rsize_bop = nfsd4_secinfo_rsize,
3507 [OP_TEST_STATEID] = {
3508 .op_func = nfsd4_test_stateid,
3509 .op_flags = ALLOWED_WITHOUT_FH,
3510 .op_name = "OP_TEST_STATEID",
3511 .op_rsize_bop = nfsd4_test_stateid_rsize,
3513 [OP_FREE_STATEID] = {
3514 .op_func = nfsd4_free_stateid,
3515 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3516 .op_name = "OP_FREE_STATEID",
3517 .op_get_currentstateid = nfsd4_get_freestateid,
3518 .op_rsize_bop = nfsd4_only_status_rsize,
3520 [OP_GET_DIR_DELEGATION] = {
3521 .op_func = nfsd4_get_dir_delegation,
3522 .op_flags = OP_MODIFIES_SOMETHING,
3523 .op_name = "OP_GET_DIR_DELEGATION",
3524 .op_rsize_bop = nfsd4_get_dir_delegation_rsize,
3526 #ifdef CONFIG_NFSD_PNFS
3527 [OP_GETDEVICEINFO] = {
3528 .op_func = nfsd4_getdeviceinfo,
3529 .op_release = nfsd4_getdeviceinfo_release,
3530 .op_flags = ALLOWED_WITHOUT_FH,
3531 .op_name = "OP_GETDEVICEINFO",
3532 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3535 .op_func = nfsd4_layoutget,
3536 .op_release = nfsd4_layoutget_release,
3537 .op_flags = OP_MODIFIES_SOMETHING,
3538 .op_name = "OP_LAYOUTGET",
3539 .op_rsize_bop = nfsd4_layoutget_rsize,
3541 [OP_LAYOUTCOMMIT] = {
3542 .op_func = nfsd4_layoutcommit,
3543 .op_flags = OP_MODIFIES_SOMETHING,
3544 .op_name = "OP_LAYOUTCOMMIT",
3545 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3547 [OP_LAYOUTRETURN] = {
3548 .op_func = nfsd4_layoutreturn,
3549 .op_flags = OP_MODIFIES_SOMETHING,
3550 .op_name = "OP_LAYOUTRETURN",
3551 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3553 #endif /* CONFIG_NFSD_PNFS */
3555 /* NFSv4.2 operations */
3557 .op_func = nfsd4_allocate,
3558 .op_flags = OP_MODIFIES_SOMETHING,
3559 .op_name = "OP_ALLOCATE",
3560 .op_rsize_bop = nfsd4_only_status_rsize,
3563 .op_func = nfsd4_deallocate,
3564 .op_flags = OP_MODIFIES_SOMETHING,
3565 .op_name = "OP_DEALLOCATE",
3566 .op_rsize_bop = nfsd4_only_status_rsize,
3569 .op_func = nfsd4_clone,
3570 .op_flags = OP_MODIFIES_SOMETHING,
3571 .op_name = "OP_CLONE",
3572 .op_rsize_bop = nfsd4_only_status_rsize,
3575 .op_func = nfsd4_copy,
3576 .op_flags = OP_MODIFIES_SOMETHING,
3577 .op_name = "OP_COPY",
3578 .op_rsize_bop = nfsd4_copy_rsize,
3581 .op_func = nfsd4_read,
3582 .op_release = nfsd4_read_release,
3583 .op_name = "OP_READ_PLUS",
3584 .op_rsize_bop = nfsd4_read_plus_rsize,
3585 .op_get_currentstateid = nfsd4_get_readstateid,
3588 .op_func = nfsd4_seek,
3589 .op_name = "OP_SEEK",
3590 .op_rsize_bop = nfsd4_seek_rsize,
3592 [OP_OFFLOAD_STATUS] = {
3593 .op_func = nfsd4_offload_status,
3594 .op_name = "OP_OFFLOAD_STATUS",
3595 .op_rsize_bop = nfsd4_offload_status_rsize,
3597 [OP_OFFLOAD_CANCEL] = {
3598 .op_func = nfsd4_offload_cancel,
3599 .op_flags = OP_MODIFIES_SOMETHING,
3600 .op_name = "OP_OFFLOAD_CANCEL",
3601 .op_rsize_bop = nfsd4_only_status_rsize,
3603 [OP_COPY_NOTIFY] = {
3604 .op_func = nfsd4_copy_notify,
3605 .op_flags = OP_MODIFIES_SOMETHING,
3606 .op_name = "OP_COPY_NOTIFY",
3607 .op_rsize_bop = nfsd4_copy_notify_rsize,
3610 .op_func = nfsd4_getxattr,
3611 .op_name = "OP_GETXATTR",
3612 .op_rsize_bop = nfsd4_getxattr_rsize,
3615 .op_func = nfsd4_setxattr,
3616 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3617 .op_name = "OP_SETXATTR",
3618 .op_rsize_bop = nfsd4_setxattr_rsize,
3621 .op_func = nfsd4_listxattrs,
3622 .op_name = "OP_LISTXATTRS",
3623 .op_rsize_bop = nfsd4_listxattrs_rsize,
3625 [OP_REMOVEXATTR] = {
3626 .op_func = nfsd4_removexattr,
3627 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3628 .op_name = "OP_REMOVEXATTR",
3629 .op_rsize_bop = nfsd4_removexattr_rsize,
3634 * nfsd4_spo_must_allow - Determine if the compound op contains an
3635 * operation that is allowed to be sent with machine credentials
3637 * @rqstp: a pointer to the struct svc_rqst
3639 * Checks to see if the compound contains a spo_must_allow op
3640 * and confirms that it was sent with the proper machine creds.
3643 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3645 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3646 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3647 struct nfsd4_op *this;
3648 struct nfsd4_compound_state *cstate = &resp->cstate;
3649 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3652 if (!cstate->minorversion)
3655 if (cstate->spo_must_allowed)
3658 opiter = resp->opcnt;
3659 while (opiter < argp->opcnt) {
3660 this = &argp->ops[opiter++];
3661 if (test_bit(this->opnum, allow->u.longs) &&
3662 cstate->clp->cl_mach_cred &&
3663 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3664 cstate->spo_must_allowed = true;
3668 cstate->spo_must_allowed = false;
3672 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3674 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3675 return op_encode_hdr_size * sizeof(__be32);
3677 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3678 return OPDESC(op)->op_rsize_bop(rqstp, op);
3681 void warn_on_nonidempotent_op(struct nfsd4_op *op)
3683 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3684 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
3685 op->opnum, nfsd4_op_name(op->opnum));
3690 static const char *nfsd4_op_name(unsigned opnum)
3692 if (opnum < ARRAY_SIZE(nfsd4_ops))
3693 return nfsd4_ops[opnum].op_name;
3694 return "unknown_operation";
3697 static const struct svc_procedure nfsd_procedures4[2] = {
3699 .pc_func = nfsd4_proc_null,
3700 .pc_decode = nfssvc_decode_voidarg,
3701 .pc_encode = nfssvc_encode_voidres,
3702 .pc_argsize = sizeof(struct nfsd_voidargs),
3703 .pc_argzero = sizeof(struct nfsd_voidargs),
3704 .pc_ressize = sizeof(struct nfsd_voidres),
3705 .pc_cachetype = RC_NOCACHE,
3709 [NFSPROC4_COMPOUND] = {
3710 .pc_func = nfsd4_proc_compound,
3711 .pc_decode = nfs4svc_decode_compoundargs,
3712 .pc_encode = nfs4svc_encode_compoundres,
3713 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3714 .pc_argzero = offsetof(struct nfsd4_compoundargs, iops),
3715 .pc_ressize = sizeof(struct nfsd4_compoundres),
3716 .pc_release = nfsd4_release_compoundargs,
3717 .pc_cachetype = RC_NOCACHE,
3718 .pc_xdrressize = NFSD_BUFSIZE/4,
3719 .pc_name = "COMPOUND",
3723 static DEFINE_PER_CPU_ALIGNED(unsigned long,
3724 nfsd_count4[ARRAY_SIZE(nfsd_procedures4)]);
3725 const struct svc_version nfsd_version4 = {
3727 .vs_nproc = ARRAY_SIZE(nfsd_procedures4),
3728 .vs_proc = nfsd_procedures4,
3729 .vs_count = nfsd_count4,
3730 .vs_dispatch = nfsd_dispatch,
3731 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3732 .vs_rpcb_optnl = true,
3733 .vs_need_cong_ctrl = true,