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/file.h>
36 #include <linux/falloc.h>
37 #include <linux/slab.h>
43 #include "current_stateid.h"
49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50 #include <linux/security.h>
53 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
55 struct inode *inode = d_inode(resfh->fh_dentry);
59 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
65 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
75 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
79 #define NFSDDBG_FACILITY NFSDDBG_PROC
81 static u32 nfsd_attrmask[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0,
83 NFSD_WRITEABLE_ATTRS_WORD1,
84 NFSD_WRITEABLE_ATTRS_WORD2
87 static u32 nfsd41_ex_attrmask[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
94 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
95 u32 *bmval, u32 *writable)
97 struct dentry *dentry = cstate->current_fh.fh_dentry;
98 struct svc_export *exp = cstate->current_fh.fh_export;
100 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
101 return nfserr_attrnotsupp;
102 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
103 return nfserr_attrnotsupp;
104 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
105 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
106 return nfserr_attrnotsupp;
107 if (writable && !bmval_is_subset(bmval, writable))
109 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
110 (bmval[1] & FATTR4_WORD1_MODE))
116 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
117 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
119 __be32 status = nfs_ok;
121 if (open->op_create == NFS4_OPEN_CREATE) {
122 if (open->op_createmode == NFS4_CREATE_UNCHECKED
123 || open->op_createmode == NFS4_CREATE_GUARDED)
124 status = check_attr_support(rqstp, cstate,
125 open->op_bmval, nfsd_attrmask);
126 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd41_ex_attrmask);
135 is_create_with_attrs(struct nfsd4_open *open)
137 return open->op_create == NFS4_OPEN_CREATE
138 && (open->op_createmode == NFS4_CREATE_UNCHECKED
139 || open->op_createmode == NFS4_CREATE_GUARDED
140 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
144 * if error occurs when setting the acl, just clear the acl bit
145 * in the returned attr bitmap.
148 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
149 struct nfs4_acl *acl, u32 *bmval)
153 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
156 * We should probably fail the whole open at this point,
157 * but we've already created the file, so it's too late;
158 * So this seems the least of evils:
160 bmval[0] &= ~FATTR4_WORD0_ACL;
164 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
167 dget(src->fh_dentry);
169 exp_get(src->fh_export);
174 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
178 if (open->op_truncate &&
179 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
182 accmode |= NFSD_MAY_READ_IF_EXEC;
184 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
185 accmode |= NFSD_MAY_READ;
186 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
187 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
188 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
189 accmode |= NFSD_MAY_WRITE;
191 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
196 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
198 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
205 * Using err_symlink as our catch-all case may look odd; but
206 * there's no other obvious error for this case in 4.0, and we
207 * happen to know that it will cause the linux v4 client to do
208 * the right thing on attempts to open something other than a
211 return nfserr_symlink;
214 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
216 if (nfsd4_has_session(cstate))
218 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
223 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
225 struct svc_fh *current_fh = &cstate->current_fh;
229 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
231 return nfserr_jukebox;
232 fh_init(*resfh, NFS4_FHSIZE);
233 open->op_truncate = 0;
235 if (open->op_create) {
236 /* FIXME: check session persistence and pnfs flags.
237 * The nfsv4.1 spec requires the following semantics:
239 * Persistent | pNFS | Server REQUIRED | Client Allowed
240 * Reply Cache | server | |
241 * -------------+--------+-----------------+--------------------
242 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
244 * | | and EXCLUSIVE4 | or EXCLUSIVE4
246 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
247 * yes | no | GUARDED4 | GUARDED4
248 * yes | yes | GUARDED4 | GUARDED4
252 * Note: create modes (UNCHECKED,GUARDED...) are the same
253 * in NFSv4 as in v3 except EXCLUSIVE4_1.
255 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
256 open->op_fname.len, &open->op_iattr,
257 *resfh, open->op_createmode,
258 (u32 *)open->op_verf.data,
259 &open->op_truncate, &open->op_created);
261 if (!status && open->op_label.len)
262 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
265 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
266 * use the returned bitmask to indicate which attributes
267 * we used to store the verifier:
269 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
270 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
271 FATTR4_WORD1_TIME_MODIFY);
274 * Note this may exit with the parent still locked.
275 * We will hold the lock until nfsd4_open's final
276 * lookup, to prevent renames or unlinks until we've had
277 * a chance to an acquire a delegation if appropriate.
279 status = nfsd_lookup(rqstp, current_fh,
280 open->op_fname.data, open->op_fname.len, *resfh);
283 status = nfsd_check_obj_isreg(*resfh);
287 if (is_create_with_attrs(open) && open->op_acl != NULL)
288 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
290 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
291 accmode = NFSD_MAY_NOP;
292 if (open->op_created ||
293 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
294 accmode |= NFSD_MAY_OWNER_OVERRIDE;
295 status = do_open_permission(rqstp, *resfh, open, accmode);
296 set_change_info(&open->op_cinfo, current_fh);
302 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
304 struct svc_fh *current_fh = &cstate->current_fh;
308 /* We don't know the target directory, and therefore can not
309 * set the change info
312 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
314 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
316 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
317 (open->op_iattr.ia_size == 0);
319 * In the delegation case, the client is telling us about an
320 * open that it *already* performed locally, some time ago. We
321 * should let it succeed now if possible.
323 * In the case of a CLAIM_FH open, on the other hand, the client
324 * may be counting on us to enforce permissions (the Linux 4.1
325 * client uses this for normal opens, for example).
327 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
328 accmode = NFSD_MAY_OWNER_OVERRIDE;
330 status = do_open_permission(rqstp, current_fh, open, accmode);
336 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
338 struct nfsd4_sessionid *sid =
339 (struct nfsd4_sessionid *)session->se_sessionid.data;
341 clid->cl_boot = sid->clientid.cl_boot;
342 clid->cl_id = sid->clientid.cl_id;
346 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
347 struct nfsd4_open *open)
350 struct svc_fh *resfh = NULL;
351 struct net *net = SVC_NET(rqstp);
352 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
354 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
355 (int)open->op_fname.len, open->op_fname.data,
358 /* This check required by spec. */
359 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
362 open->op_created = 0;
365 * Before RECLAIM_COMPLETE done, server should deny new lock
367 if (nfsd4_has_session(cstate) &&
368 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
369 &cstate->session->se_client->cl_flags) &&
370 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
373 if (nfsd4_has_session(cstate))
374 copy_clientid(&open->op_clientid, cstate->session);
376 /* check seqid for replay. set nfs4_owner */
377 status = nfsd4_process_open1(cstate, open, nn);
378 if (status == nfserr_replay_me) {
379 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
380 fh_put(&cstate->current_fh);
381 fh_copy_shallow(&cstate->current_fh.fh_handle,
383 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
385 dprintk("nfsd4_open: replay failed"
386 " restoring previous filehandle\n");
388 status = nfserr_replay_me;
392 if (open->op_xdr_error) {
393 status = open->op_xdr_error;
397 status = nfsd4_check_open_attributes(rqstp, cstate, open);
401 /* Openowner is now set, so sequence id will get bumped. Now we need
402 * these checks before we do any creates: */
403 status = nfserr_grace;
404 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
406 status = nfserr_no_grace;
407 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
410 switch (open->op_claim_type) {
411 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
412 case NFS4_OPEN_CLAIM_NULL:
413 status = do_open_lookup(rqstp, cstate, open, &resfh);
417 case NFS4_OPEN_CLAIM_PREVIOUS:
418 status = nfs4_check_open_reclaim(&open->op_clientid,
422 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
423 case NFS4_OPEN_CLAIM_FH:
424 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
425 status = do_open_fhandle(rqstp, cstate, open);
428 resfh = &cstate->current_fh;
430 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
431 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
432 dprintk("NFSD: unsupported OPEN claim type %d\n",
433 open->op_claim_type);
434 status = nfserr_notsupp;
437 dprintk("NFSD: Invalid OPEN claim type %d\n",
438 open->op_claim_type);
439 status = nfserr_inval;
443 * nfsd4_process_open2() does the actual opening of the file. If
444 * successful, it (1) truncates the file if open->op_truncate was
445 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
447 status = nfsd4_process_open2(rqstp, resfh, open);
448 WARN(status && open->op_created,
449 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
450 be32_to_cpu(status));
452 if (resfh && resfh != &cstate->current_fh) {
453 fh_dup2(&cstate->current_fh, resfh);
457 nfsd4_cleanup_open_state(cstate, open);
458 nfsd4_bump_seqid(cstate, status);
463 * OPEN is the only seqid-mutating operation whose decoding can fail
464 * with a seqid-mutating error (specifically, decoding of user names in
465 * the attributes). Therefore we have to do some processing to look up
466 * the stateowner so that we can bump the seqid.
468 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
470 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
472 if (!seqid_mutating_err(ntohl(op->status)))
474 if (nfsd4_has_session(cstate))
476 open->op_xdr_error = op->status;
477 return nfsd4_open(rqstp, cstate, open);
481 * filehandle-manipulating ops.
484 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
485 struct svc_fh **getfh)
487 if (!cstate->current_fh.fh_dentry)
488 return nfserr_nofilehandle;
490 *getfh = &cstate->current_fh;
495 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
496 struct nfsd4_putfh *putfh)
498 fh_put(&cstate->current_fh);
499 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
500 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
502 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
506 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
511 fh_put(&cstate->current_fh);
512 status = exp_pseudoroot(rqstp, &cstate->current_fh);
517 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
520 if (!cstate->save_fh.fh_dentry)
521 return nfserr_restorefh;
523 fh_dup2(&cstate->current_fh, &cstate->save_fh);
524 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
525 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
526 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
532 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
535 if (!cstate->current_fh.fh_dentry)
536 return nfserr_nofilehandle;
538 fh_dup2(&cstate->save_fh, &cstate->current_fh);
539 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
540 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
541 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
550 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
551 struct nfsd4_access *access)
553 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
556 access->ac_resp_access = access->ac_req_access;
557 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
558 &access->ac_supported);
561 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
564 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
567 * This is opaque to client, so no need to byte-swap. Use
568 * __force to keep sparse happy
570 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
571 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
572 memcpy(verifier->data, verf, sizeof(verifier->data));
576 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
577 struct nfsd4_commit *commit)
579 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
580 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
585 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
586 struct nfsd4_create *create)
592 fh_init(&resfh, NFS4_FHSIZE);
594 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
598 status = check_attr_support(rqstp, cstate, create->cr_bmval,
603 switch (create->cr_type) {
605 status = nfsd_symlink(rqstp, &cstate->current_fh,
606 create->cr_name, create->cr_namelen,
607 create->cr_data, &resfh);
611 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
612 if (MAJOR(rdev) != create->cr_specdata1 ||
613 MINOR(rdev) != create->cr_specdata2)
615 status = nfsd_create(rqstp, &cstate->current_fh,
616 create->cr_name, create->cr_namelen,
617 &create->cr_iattr, S_IFBLK, rdev, &resfh);
621 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
622 if (MAJOR(rdev) != create->cr_specdata1 ||
623 MINOR(rdev) != create->cr_specdata2)
625 status = nfsd_create(rqstp, &cstate->current_fh,
626 create->cr_name, create->cr_namelen,
627 &create->cr_iattr,S_IFCHR, rdev, &resfh);
631 status = nfsd_create(rqstp, &cstate->current_fh,
632 create->cr_name, create->cr_namelen,
633 &create->cr_iattr, S_IFSOCK, 0, &resfh);
637 status = nfsd_create(rqstp, &cstate->current_fh,
638 create->cr_name, create->cr_namelen,
639 &create->cr_iattr, S_IFIFO, 0, &resfh);
643 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
644 status = nfsd_create(rqstp, &cstate->current_fh,
645 create->cr_name, create->cr_namelen,
646 &create->cr_iattr, S_IFDIR, 0, &resfh);
650 status = nfserr_badtype;
656 if (create->cr_label.len)
657 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
659 if (create->cr_acl != NULL)
660 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
663 fh_unlock(&cstate->current_fh);
664 set_change_info(&create->cr_cinfo, &cstate->current_fh);
665 fh_dup2(&cstate->current_fh, &resfh);
672 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
673 struct nfsd4_getattr *getattr)
677 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
681 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
684 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
685 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
686 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
688 getattr->ga_fhp = &cstate->current_fh;
693 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
694 struct nfsd4_link *link)
696 __be32 status = nfserr_nofilehandle;
698 if (!cstate->save_fh.fh_dentry)
700 status = nfsd_link(rqstp, &cstate->current_fh,
701 link->li_name, link->li_namelen, &cstate->save_fh);
703 set_change_info(&link->li_cinfo, &cstate->current_fh);
707 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
709 struct svc_fh tmp_fh;
712 fh_init(&tmp_fh, NFS4_FHSIZE);
713 ret = exp_pseudoroot(rqstp, &tmp_fh);
716 if (tmp_fh.fh_dentry == fh->fh_dentry) {
721 return nfsd_lookup(rqstp, fh, "..", 2, fh);
725 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
728 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
732 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
733 struct nfsd4_lookup *lookup)
735 return nfsd_lookup(rqstp, &cstate->current_fh,
736 lookup->lo_name, lookup->lo_len,
737 &cstate->current_fh);
741 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 struct nfsd4_read *read)
746 read->rd_filp = NULL;
747 if (read->rd_offset >= OFFSET_MAX)
751 * If we do a zero copy read, then a client will see read data
752 * that reflects the state of the file *after* performing the
753 * following compound.
755 * To ensure proper ordering, we therefore turn off zero copy if
756 * the client wants us to do more in this compound:
758 if (!nfsd4_last_compound_op(rqstp))
759 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
762 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
763 &read->rd_stateid, RD_STATE,
764 &read->rd_filp, &read->rd_tmp_file);
766 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
771 read->rd_rqstp = rqstp;
772 read->rd_fhp = &cstate->current_fh;
777 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
778 struct nfsd4_readdir *readdir)
780 u64 cookie = readdir->rd_cookie;
781 static const nfs4_verifier zeroverf;
783 /* no need to check permission - this will be done in nfsd_readdir() */
785 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
788 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
789 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
790 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
792 if ((cookie == 1) || (cookie == 2) ||
793 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
794 return nfserr_bad_cookie;
796 readdir->rd_rqstp = rqstp;
797 readdir->rd_fhp = &cstate->current_fh;
802 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
803 struct nfsd4_readlink *readlink)
805 readlink->rl_rqstp = rqstp;
806 readlink->rl_fhp = &cstate->current_fh;
811 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
812 struct nfsd4_remove *remove)
816 if (opens_in_grace(SVC_NET(rqstp)))
818 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
819 remove->rm_name, remove->rm_namelen);
821 fh_unlock(&cstate->current_fh);
822 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
828 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
829 struct nfsd4_rename *rename)
831 __be32 status = nfserr_nofilehandle;
833 if (!cstate->save_fh.fh_dentry)
835 if (opens_in_grace(SVC_NET(rqstp)) &&
836 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
838 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
839 rename->rn_snamelen, &cstate->current_fh,
840 rename->rn_tname, rename->rn_tnamelen);
843 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
844 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
849 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
850 struct nfsd4_secinfo *secinfo)
852 struct svc_export *exp;
853 struct dentry *dentry;
856 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
859 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
860 secinfo->si_name, secinfo->si_namelen,
864 fh_unlock(&cstate->current_fh);
865 if (d_really_is_negative(dentry)) {
869 secinfo->si_exp = exp;
871 if (cstate->minorversion)
872 /* See rfc 5661 section 2.6.3.1.1.8 */
873 fh_put(&cstate->current_fh);
878 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
879 struct nfsd4_secinfo_no_name *sin)
883 switch (sin->sin_style) {
884 case NFS4_SECINFO_STYLE4_CURRENT_FH:
886 case NFS4_SECINFO_STYLE4_PARENT:
887 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
895 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
896 fh_put(&cstate->current_fh);
901 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
902 struct nfsd4_setattr *setattr)
904 __be32 status = nfs_ok;
907 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
908 status = nfs4_preprocess_stateid_op(rqstp, cstate,
909 &cstate->current_fh, &setattr->sa_stateid,
910 WR_STATE, NULL, NULL);
912 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
916 err = fh_want_write(&cstate->current_fh);
918 return nfserrno(err);
921 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
926 if (setattr->sa_acl != NULL)
927 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
931 if (setattr->sa_label.len)
932 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
936 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
939 fh_drop_write(&cstate->current_fh);
943 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
946 int buflen = write->wr_buflen;
948 vec[0].iov_base = write->wr_head.iov_base;
949 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
950 buflen -= vec[0].iov_len;
953 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
954 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
955 buflen -= vec[i].iov_len;
962 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
963 struct nfsd4_write *write)
965 stateid_t *stateid = &write->wr_stateid;
966 struct file *filp = NULL;
967 __be32 status = nfs_ok;
971 if (write->wr_offset >= OFFSET_MAX)
974 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
975 stateid, WR_STATE, &filp, NULL);
977 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
981 cnt = write->wr_buflen;
982 write->wr_how_written = write->wr_stable_how;
983 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
985 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
986 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
988 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
989 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
990 write->wr_how_written);
993 write->wr_bytes_written = cnt;
999 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1000 stateid_t *src_stateid, struct file **src,
1001 stateid_t *dst_stateid, struct file **dst)
1005 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1006 src_stateid, RD_STATE, src, NULL);
1008 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1012 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1013 dst_stateid, WR_STATE, dst, NULL);
1015 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1019 /* fix up for NFS-specific error code */
1020 if (!S_ISREG(file_inode(*src)->i_mode) ||
1021 !S_ISREG(file_inode(*dst)->i_mode)) {
1022 status = nfserr_wrong_type;
1036 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1037 struct nfsd4_clone *clone)
1039 struct file *src, *dst;
1042 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1043 &clone->cl_dst_stateid, &dst);
1047 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1048 dst, clone->cl_dst_pos, clone->cl_count);
1057 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1058 struct nfsd4_copy *copy)
1060 struct file *src, *dst;
1064 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1065 ©->cp_dst_stateid, &dst);
1069 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1070 dst, copy->cp_dst_pos, copy->cp_count);
1073 status = nfserrno(bytes);
1075 copy->cp_res.wr_bytes_written = bytes;
1076 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1077 copy->cp_consecutive = 1;
1078 copy->cp_synchronous = 1;
1079 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1090 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1091 struct nfsd4_fallocate *fallocate, int flags)
1093 __be32 status = nfserr_notsupp;
1096 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1097 &fallocate->falloc_stateid,
1098 WR_STATE, &file, NULL);
1099 if (status != nfs_ok) {
1100 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1104 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1105 fallocate->falloc_offset,
1106 fallocate->falloc_length,
1113 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1114 struct nfsd4_fallocate *fallocate)
1116 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1120 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1121 struct nfsd4_fallocate *fallocate)
1123 return nfsd4_fallocate(rqstp, cstate, fallocate,
1124 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1128 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1129 struct nfsd4_seek *seek)
1135 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1136 &seek->seek_stateid,
1137 RD_STATE, &file, NULL);
1139 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1143 switch (seek->seek_whence) {
1144 case NFS4_CONTENT_DATA:
1147 case NFS4_CONTENT_HOLE:
1151 status = nfserr_union_notsupp;
1156 * Note: This call does change file->f_pos, but nothing in NFSD
1157 * should ever file->f_pos.
1159 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1160 if (seek->seek_pos < 0)
1161 status = nfserrno(seek->seek_pos);
1162 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1163 seek->seek_eof = true;
1170 /* This routine never returns NFS_OK! If there are no other errors, it
1171 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1172 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1173 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1176 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1177 struct nfsd4_verify *verify)
1183 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1187 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1191 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1192 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1193 return nfserr_inval;
1194 if (verify->ve_attrlen & 3)
1195 return nfserr_inval;
1198 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1200 count = 4 + (verify->ve_attrlen >> 2);
1201 buf = kmalloc(count << 2, GFP_KERNEL);
1203 return nfserr_jukebox;
1206 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1207 cstate->current_fh.fh_export,
1208 cstate->current_fh.fh_dentry,
1212 * If nfsd4_encode_fattr() ran out of space, assume that's because
1213 * the attributes are longer (hence different) than those given:
1215 if (status == nfserr_resource)
1216 status = nfserr_not_same;
1221 p = buf + 1 + ntohl(buf[0]);
1222 status = nfserr_not_same;
1223 if (ntohl(*p++) != verify->ve_attrlen)
1225 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1226 status = nfserr_same;
1234 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1235 struct nfsd4_verify *verify)
1239 status = _nfsd4_verify(rqstp, cstate, verify);
1240 return status == nfserr_not_same ? nfs_ok : status;
1244 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1245 struct nfsd4_verify *verify)
1249 status = _nfsd4_verify(rqstp, cstate, verify);
1250 return status == nfserr_same ? nfs_ok : status;
1253 #ifdef CONFIG_NFSD_PNFS
1254 static const struct nfsd4_layout_ops *
1255 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1257 if (!exp->ex_layout_types) {
1258 dprintk("%s: export does not support pNFS\n", __func__);
1262 if (layout_type >= LAYOUT_TYPE_MAX ||
1263 !(exp->ex_layout_types & (1 << layout_type))) {
1264 dprintk("%s: layout type %d not supported\n",
1265 __func__, layout_type);
1269 return nfsd4_layout_ops[layout_type];
1273 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1274 struct nfsd4_compound_state *cstate,
1275 struct nfsd4_getdeviceinfo *gdp)
1277 const struct nfsd4_layout_ops *ops;
1278 struct nfsd4_deviceid_map *map;
1279 struct svc_export *exp;
1282 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1284 gdp->gd_layout_type,
1285 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1288 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1290 dprintk("%s: couldn't find device ID to export mapping!\n",
1292 return nfserr_noent;
1295 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1297 dprintk("%s: could not find device id\n", __func__);
1298 return nfserr_noent;
1301 nfserr = nfserr_layoutunavailable;
1302 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1307 if (gdp->gd_maxcount != 0) {
1308 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1309 rqstp, cstate->session->se_client, gdp);
1312 gdp->gd_notify_types &= ops->notify_types;
1319 nfsd4_layoutget(struct svc_rqst *rqstp,
1320 struct nfsd4_compound_state *cstate,
1321 struct nfsd4_layoutget *lgp)
1323 struct svc_fh *current_fh = &cstate->current_fh;
1324 const struct nfsd4_layout_ops *ops;
1325 struct nfs4_layout_stateid *ls;
1329 switch (lgp->lg_seg.iomode) {
1331 accmode = NFSD_MAY_READ;
1334 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1337 dprintk("%s: invalid iomode %d\n",
1338 __func__, lgp->lg_seg.iomode);
1339 nfserr = nfserr_badiomode;
1343 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1347 nfserr = nfserr_layoutunavailable;
1348 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1353 * Verify minlength and range as per RFC5661:
1354 * o If loga_length is less than loga_minlength,
1355 * the metadata server MUST return NFS4ERR_INVAL.
1356 * o If the sum of loga_offset and loga_minlength exceeds
1357 * NFS4_UINT64_MAX, and loga_minlength is not
1358 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1359 * o If the sum of loga_offset and loga_length exceeds
1360 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1361 * the error NFS4ERR_INVAL MUST result.
1363 nfserr = nfserr_inval;
1364 if (lgp->lg_seg.length < lgp->lg_minlength ||
1365 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1366 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1367 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1368 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1370 if (lgp->lg_seg.length == 0)
1373 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1374 true, lgp->lg_layout_type, &ls);
1376 trace_layout_get_lookup_fail(&lgp->lg_sid);
1380 nfserr = nfserr_recallconflict;
1381 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1384 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1389 nfserr = nfsd4_insert_layout(lgp, ls);
1392 mutex_unlock(&ls->ls_mutex);
1393 nfs4_put_stid(&ls->ls_stid);
1399 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1400 struct nfsd4_compound_state *cstate,
1401 struct nfsd4_layoutcommit *lcp)
1403 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1404 struct svc_fh *current_fh = &cstate->current_fh;
1405 const struct nfsd4_layout_ops *ops;
1406 loff_t new_size = lcp->lc_last_wr + 1;
1407 struct inode *inode;
1408 struct nfs4_layout_stateid *ls;
1411 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1415 nfserr = nfserr_layoutunavailable;
1416 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1419 inode = d_inode(current_fh->fh_dentry);
1421 nfserr = nfserr_inval;
1422 if (new_size <= seg->offset) {
1423 dprintk("pnfsd: last write before layout segment\n");
1426 if (new_size > seg->offset + seg->length) {
1427 dprintk("pnfsd: last write beyond layout segment\n");
1430 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1431 dprintk("pnfsd: layoutcommit beyond EOF\n");
1435 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1436 false, lcp->lc_layout_type,
1439 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1440 /* fixup error code as per RFC5661 */
1441 if (nfserr == nfserr_bad_stateid)
1442 nfserr = nfserr_badlayout;
1446 /* LAYOUTCOMMIT does not require any serialization */
1447 mutex_unlock(&ls->ls_mutex);
1449 if (new_size > i_size_read(inode)) {
1450 lcp->lc_size_chg = 1;
1451 lcp->lc_newsize = new_size;
1453 lcp->lc_size_chg = 0;
1456 nfserr = ops->proc_layoutcommit(inode, lcp);
1457 nfs4_put_stid(&ls->ls_stid);
1463 nfsd4_layoutreturn(struct svc_rqst *rqstp,
1464 struct nfsd4_compound_state *cstate,
1465 struct nfsd4_layoutreturn *lrp)
1467 struct svc_fh *current_fh = &cstate->current_fh;
1470 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1474 nfserr = nfserr_layoutunavailable;
1475 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1478 switch (lrp->lr_seg.iomode) {
1484 dprintk("%s: invalid iomode %d\n", __func__,
1485 lrp->lr_seg.iomode);
1486 nfserr = nfserr_inval;
1490 switch (lrp->lr_return_type) {
1492 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1496 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1499 dprintk("%s: invalid return_type %d\n", __func__,
1500 lrp->lr_return_type);
1501 nfserr = nfserr_inval;
1507 #endif /* CONFIG_NFSD_PNFS */
1513 nfsd4_proc_null(struct svc_rqst *rqstp)
1518 static inline void nfsd4_increment_op_stats(u32 opnum)
1520 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1521 nfsdstats.nfs4_opcount[opnum]++;
1524 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1526 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1528 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1529 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1531 enum nfsd4_op_flags {
1532 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1533 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1534 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1535 /* For rfc 5661 section 2.6.3.1.1: */
1536 OP_HANDLES_WRONGSEC = 1 << 3,
1537 OP_IS_PUTFH_LIKE = 1 << 4,
1539 * These are the ops whose result size we estimate before
1540 * encoding, to avoid performing an op then not being able to
1541 * respond or cache a response. This includes writes and setattrs
1542 * as well as the operations usually called "nonidempotent":
1544 OP_MODIFIES_SOMETHING = 1 << 5,
1546 * Cache compounds containing these ops in the xid-based drc:
1547 * We use the DRC for compounds containing non-idempotent
1548 * operations, *except* those that are 4.1-specific (since
1549 * sessions provide their own EOS), and except for stateful
1550 * operations other than setclientid and setclientid_confirm
1551 * (since sequence numbers provide EOS for open, lock, etc in
1554 OP_CACHEME = 1 << 6,
1556 * These are ops which clear current state id.
1558 OP_CLEAR_STATEID = 1 << 7,
1561 struct nfsd4_operation {
1562 nfsd4op_func op_func;
1565 /* Try to get response size before operation */
1566 nfsd4op_rsize op_rsize_bop;
1567 stateid_getter op_get_currentstateid;
1568 stateid_setter op_set_currentstateid;
1571 static struct nfsd4_operation nfsd4_ops[];
1573 static const char *nfsd4_op_name(unsigned opnum);
1576 * Enforce NFSv4.1 COMPOUND ordering rules:
1578 * Also note, enforced elsewhere:
1579 * - SEQUENCE other than as first op results in
1580 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1581 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1582 * (Enforced in nfsd4_bind_conn_to_session().)
1583 * - DESTROY_SESSION must be the final operation in a compound, if
1584 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1585 * (Enforced in nfsd4_destroy_session().)
1587 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1589 struct nfsd4_op *op = &args->ops[0];
1591 /* These ordering requirements don't apply to NFSv4.0: */
1592 if (args->minorversion == 0)
1594 /* This is weird, but OK, not our problem: */
1595 if (args->opcnt == 0)
1597 if (op->status == nfserr_op_illegal)
1599 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1600 return nfserr_op_not_in_session;
1601 if (op->opnum == OP_SEQUENCE)
1603 if (args->opcnt != 1)
1604 return nfserr_not_only_op;
1608 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1610 return &nfsd4_ops[op->opnum];
1613 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1615 if (op->opnum == OP_ILLEGAL)
1617 return OPDESC(op)->op_flags & OP_CACHEME;
1620 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1622 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1623 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1624 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1625 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1626 struct nfsd4_operation *thisd;
1627 struct nfsd4_operation *nextd;
1629 thisd = OPDESC(this);
1631 * Most ops check wronsec on our own; only the putfh-like ops
1632 * have special rules.
1634 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1637 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1638 * put-filehandle operation if we're not going to use the
1641 if (argp->opcnt == resp->opcnt)
1643 if (next->opnum == OP_ILLEGAL)
1645 nextd = OPDESC(next);
1647 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1648 * errors themselves as necessary; others should check for them
1651 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1654 static void svcxdr_init_encode(struct svc_rqst *rqstp,
1655 struct nfsd4_compoundres *resp)
1657 struct xdr_stream *xdr = &resp->xdr;
1658 struct xdr_buf *buf = &rqstp->rq_res;
1659 struct kvec *head = buf->head;
1663 xdr->p = head->iov_base + head->iov_len;
1664 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1665 /* Tail and page_len should be zero at this point: */
1666 buf->len = buf->head[0].iov_len;
1667 xdr->scratch.iov_len = 0;
1668 xdr->page_ptr = buf->pages - 1;
1669 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1670 - rqstp->rq_auth_slack;
1677 nfsd4_proc_compound(struct svc_rqst *rqstp)
1679 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1680 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1681 struct nfsd4_op *op;
1682 struct nfsd4_operation *opdesc;
1683 struct nfsd4_compound_state *cstate = &resp->cstate;
1684 struct svc_fh *current_fh = &cstate->current_fh;
1685 struct svc_fh *save_fh = &cstate->save_fh;
1688 svcxdr_init_encode(rqstp, resp);
1689 resp->tagp = resp->xdr.p;
1690 /* reserve space for: taglen, tag, and opcnt */
1691 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1692 resp->taglen = args->taglen;
1693 resp->tag = args->tag;
1694 resp->rqstp = rqstp;
1695 cstate->minorversion = args->minorversion;
1696 fh_init(current_fh, NFS4_FHSIZE);
1697 fh_init(save_fh, NFS4_FHSIZE);
1699 * Don't use the deferral mechanism for NFSv4; compounds make it
1700 * too hard to avoid non-idempotency problems.
1702 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1705 * According to RFC3010, this takes precedence over all other errors.
1707 status = nfserr_minor_vers_mismatch;
1708 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1711 status = nfs41_check_op_ordering(args);
1714 op->status = status;
1718 while (!status && resp->opcnt < args->opcnt) {
1719 op = &args->ops[resp->opcnt++];
1721 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1722 resp->opcnt, args->opcnt, op->opnum,
1723 nfsd4_op_name(op->opnum));
1725 * The XDR decode routines may have pre-set op->status;
1726 * for example, if there is a miscellaneous XDR error
1727 * it will be set to nfserr_bad_xdr.
1730 if (op->opnum == OP_OPEN)
1731 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1735 opdesc = OPDESC(op);
1737 if (!current_fh->fh_dentry) {
1738 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1739 op->status = nfserr_nofilehandle;
1742 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1743 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1744 op->status = nfserr_moved;
1748 fh_clear_wcc(current_fh);
1750 /* If op is non-idempotent */
1751 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1753 * Don't execute this op if we couldn't encode a
1756 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1758 * Plus if there's another operation, make sure
1759 * we'll have space to at least encode an error:
1761 if (resp->opcnt < args->opcnt)
1762 plen += COMPOUND_ERR_SLACK_SPACE;
1763 op->status = nfsd4_check_resp_size(resp, plen);
1769 if (opdesc->op_get_currentstateid)
1770 opdesc->op_get_currentstateid(cstate, &op->u);
1771 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1773 /* Only from SEQUENCE */
1774 if (cstate->status == nfserr_replay_cache) {
1775 dprintk("%s NFS4.1 replay from cache\n", __func__);
1776 status = op->status;
1780 if (opdesc->op_set_currentstateid)
1781 opdesc->op_set_currentstateid(cstate, &op->u);
1783 if (opdesc->op_flags & OP_CLEAR_STATEID)
1784 clear_current_stateid(cstate);
1786 if (need_wrongsec_check(rqstp))
1787 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1790 if (op->status == nfserr_replay_me) {
1791 op->replay = &cstate->replay_owner->so_replay;
1792 nfsd4_encode_replay(&resp->xdr, op);
1793 status = op->status = op->replay->rp_status;
1795 nfsd4_encode_operation(resp, op);
1796 status = op->status;
1799 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1800 args->ops, args->opcnt, resp->opcnt, op->opnum,
1801 be32_to_cpu(status));
1803 nfsd4_cstate_clear_replay(cstate);
1804 nfsd4_increment_op_stats(op->opnum);
1807 cstate->status = status;
1810 BUG_ON(cstate->replay_owner);
1812 /* Reset deferral mechanism for RPC deferrals */
1813 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1814 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1818 #define op_encode_hdr_size (2)
1819 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1820 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1821 #define op_encode_change_info_maxsz (5)
1822 #define nfs4_fattr_bitmap_maxsz (4)
1824 /* We'll fall back on returning no lockowner if run out of space: */
1825 #define op_encode_lockowner_maxsz (0)
1826 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1828 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1830 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1831 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1832 op_encode_ace_maxsz)
1834 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1836 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1838 return (op_encode_hdr_size) * sizeof(__be32);
1841 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1843 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1846 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1848 /* ac_supported, ac_resp_access */
1849 return (op_encode_hdr_size + 2)* sizeof(__be32);
1852 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1854 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1857 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1859 return (op_encode_hdr_size + op_encode_change_info_maxsz
1860 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1864 * Note since this is an idempotent operation we won't insist on failing
1865 * the op prematurely if the estimate is too large. We may turn off splice
1866 * reads unnecessarily.
1868 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1869 struct nfsd4_op *op)
1871 u32 *bmap = op->u.getattr.ga_bmval;
1872 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1875 if (bmap0 & FATTR4_WORD0_ACL)
1876 return svc_max_payload(rqstp);
1877 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1878 return svc_max_payload(rqstp);
1880 if (bmap1 & FATTR4_WORD1_OWNER) {
1881 ret += IDMAP_NAMESZ + 4;
1882 bmap1 &= ~FATTR4_WORD1_OWNER;
1884 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1885 ret += IDMAP_NAMESZ + 4;
1886 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1888 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1889 ret += NFS4_FHSIZE + 4;
1890 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1892 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1893 ret += NFS4_MAXLABELLEN + 12;
1894 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1897 * Largest of remaining attributes are 16 bytes (e.g.,
1898 * supported_attributes)
1900 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1901 /* bitmask, length */
1906 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1908 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1911 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1913 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1917 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1919 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1923 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1925 return (op_encode_hdr_size + op_encode_stateid_maxsz
1926 + op_encode_change_info_maxsz + 1
1927 + nfs4_fattr_bitmap_maxsz
1928 + op_encode_delegation_maxsz) * sizeof(__be32);
1931 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1933 u32 maxcount = 0, rlen = 0;
1935 maxcount = svc_max_payload(rqstp);
1936 rlen = min(op->u.read.rd_length, maxcount);
1938 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1941 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1943 u32 maxcount = 0, rlen = 0;
1945 maxcount = svc_max_payload(rqstp);
1946 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1948 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1949 XDR_QUADLEN(rlen)) * sizeof(__be32);
1952 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1954 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1957 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1959 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1963 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1965 return (op_encode_hdr_size + op_encode_change_info_maxsz
1966 + op_encode_change_info_maxsz) * sizeof(__be32);
1969 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1970 struct nfsd4_op *op)
1972 return (op_encode_hdr_size
1973 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1976 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1978 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1982 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1984 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1987 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1989 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1990 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
1993 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1995 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1999 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2001 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2004 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2006 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2007 1 + 1 + /* eir_flags, spr_how */\
2008 4 + /* spo_must_enforce & _allow with bitmap */\
2009 2 + /*eir_server_owner.so_minor_id */\
2010 /* eir_server_owner.so_major_id<> */\
2011 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2012 /* eir_server_scope<> */\
2013 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2014 1 + /* eir_server_impl_id array length */\
2015 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2018 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020 return (op_encode_hdr_size + \
2021 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2022 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2025 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2027 return (op_encode_hdr_size + \
2028 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2029 2 + /* csr_sequence, csr_flags */\
2030 op_encode_channel_attrs_maxsz + \
2031 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2034 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2036 return (op_encode_hdr_size +
2037 1 /* wr_callback */ +
2038 op_encode_stateid_maxsz /* wr_callback */ +
2040 1 /* wr_committed */ +
2041 op_encode_verifier_maxsz +
2042 1 /* cr_consecutive */ +
2043 1 /* cr_synchronous */) * sizeof(__be32);
2046 #ifdef CONFIG_NFSD_PNFS
2047 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2049 u32 maxcount = 0, rlen = 0;
2051 maxcount = svc_max_payload(rqstp);
2052 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2054 return (op_encode_hdr_size +
2055 1 /* gd_layout_type*/ +
2057 2 /* gd_notify_types */) * sizeof(__be32);
2061 * At this stage we don't really know what layout driver will handle the request,
2062 * so we need to define an arbitrary upper bound here.
2064 #define MAX_LAYOUT_SIZE 128
2065 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2067 return (op_encode_hdr_size +
2068 1 /* logr_return_on_close */ +
2069 op_encode_stateid_maxsz +
2070 1 /* nr of layouts */ +
2071 MAX_LAYOUT_SIZE) * sizeof(__be32);
2074 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2076 return (op_encode_hdr_size +
2077 1 /* locr_newsize */ +
2078 2 /* ns_size */) * sizeof(__be32);
2081 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2083 return (op_encode_hdr_size +
2084 1 /* lrs_stateid */ +
2085 op_encode_stateid_maxsz) * sizeof(__be32);
2087 #endif /* CONFIG_NFSD_PNFS */
2090 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2092 return (op_encode_hdr_size + 3) * sizeof(__be32);
2095 static struct nfsd4_operation nfsd4_ops[] = {
2097 .op_func = (nfsd4op_func)nfsd4_access,
2098 .op_name = "OP_ACCESS",
2099 .op_rsize_bop = (nfsd4op_rsize)nfsd4_access_rsize,
2102 .op_func = (nfsd4op_func)nfsd4_close,
2103 .op_flags = OP_MODIFIES_SOMETHING,
2104 .op_name = "OP_CLOSE",
2105 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2106 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2107 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
2110 .op_func = (nfsd4op_func)nfsd4_commit,
2111 .op_flags = OP_MODIFIES_SOMETHING,
2112 .op_name = "OP_COMMIT",
2113 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
2116 .op_func = (nfsd4op_func)nfsd4_create,
2117 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2118 .op_name = "OP_CREATE",
2119 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
2121 [OP_DELEGRETURN] = {
2122 .op_func = (nfsd4op_func)nfsd4_delegreturn,
2123 .op_flags = OP_MODIFIES_SOMETHING,
2124 .op_name = "OP_DELEGRETURN",
2125 .op_rsize_bop = nfsd4_only_status_rsize,
2126 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
2129 .op_func = (nfsd4op_func)nfsd4_getattr,
2130 .op_flags = ALLOWED_ON_ABSENT_FS,
2131 .op_rsize_bop = nfsd4_getattr_rsize,
2132 .op_name = "OP_GETATTR",
2135 .op_func = (nfsd4op_func)nfsd4_getfh,
2136 .op_name = "OP_GETFH",
2137 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getfh_rsize,
2140 .op_func = (nfsd4op_func)nfsd4_link,
2141 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2143 .op_name = "OP_LINK",
2144 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
2147 .op_func = (nfsd4op_func)nfsd4_lock,
2148 .op_flags = OP_MODIFIES_SOMETHING,
2149 .op_name = "OP_LOCK",
2150 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
2151 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
2154 .op_func = (nfsd4op_func)nfsd4_lockt,
2155 .op_name = "OP_LOCKT",
2156 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
2159 .op_func = (nfsd4op_func)nfsd4_locku,
2160 .op_flags = OP_MODIFIES_SOMETHING,
2161 .op_name = "OP_LOCKU",
2162 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2163 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
2166 .op_func = (nfsd4op_func)nfsd4_lookup,
2167 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2168 .op_name = "OP_LOOKUP",
2169 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2172 .op_func = (nfsd4op_func)nfsd4_lookupp,
2173 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2174 .op_name = "OP_LOOKUPP",
2175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2178 .op_func = (nfsd4op_func)nfsd4_nverify,
2179 .op_name = "OP_NVERIFY",
2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2183 .op_func = (nfsd4op_func)nfsd4_open,
2184 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2185 .op_name = "OP_OPEN",
2186 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
2187 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
2189 [OP_OPEN_CONFIRM] = {
2190 .op_func = (nfsd4op_func)nfsd4_open_confirm,
2191 .op_flags = OP_MODIFIES_SOMETHING,
2192 .op_name = "OP_OPEN_CONFIRM",
2193 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2195 [OP_OPEN_DOWNGRADE] = {
2196 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
2197 .op_flags = OP_MODIFIES_SOMETHING,
2198 .op_name = "OP_OPEN_DOWNGRADE",
2199 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2200 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2201 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
2204 .op_func = (nfsd4op_func)nfsd4_putfh,
2205 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2206 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2207 .op_name = "OP_PUTFH",
2208 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2211 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2212 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2213 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2214 .op_name = "OP_PUTPUBFH",
2215 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2218 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2219 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2220 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2221 .op_name = "OP_PUTROOTFH",
2222 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2225 .op_func = (nfsd4op_func)nfsd4_read,
2226 .op_name = "OP_READ",
2227 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
2228 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
2231 .op_func = (nfsd4op_func)nfsd4_readdir,
2232 .op_name = "OP_READDIR",
2233 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
2236 .op_func = (nfsd4op_func)nfsd4_readlink,
2237 .op_name = "OP_READLINK",
2238 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readlink_rsize,
2241 .op_func = (nfsd4op_func)nfsd4_remove,
2242 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2243 .op_name = "OP_REMOVE",
2244 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
2247 .op_func = (nfsd4op_func)nfsd4_rename,
2248 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2249 .op_name = "OP_RENAME",
2250 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
2253 .op_func = (nfsd4op_func)nfsd4_renew,
2254 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2255 | OP_MODIFIES_SOMETHING,
2256 .op_name = "OP_RENEW",
2257 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2261 .op_func = (nfsd4op_func)nfsd4_restorefh,
2262 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2263 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2264 .op_name = "OP_RESTOREFH",
2265 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2268 .op_func = (nfsd4op_func)nfsd4_savefh,
2269 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2270 .op_name = "OP_SAVEFH",
2271 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2274 .op_func = (nfsd4op_func)nfsd4_secinfo,
2275 .op_flags = OP_HANDLES_WRONGSEC,
2276 .op_name = "OP_SECINFO",
2277 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize,
2280 .op_func = (nfsd4op_func)nfsd4_setattr,
2281 .op_name = "OP_SETATTR",
2282 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2283 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
2284 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
2286 [OP_SETCLIENTID] = {
2287 .op_func = (nfsd4op_func)nfsd4_setclientid,
2288 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2289 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2290 .op_name = "OP_SETCLIENTID",
2291 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
2293 [OP_SETCLIENTID_CONFIRM] = {
2294 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
2295 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2296 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2297 .op_name = "OP_SETCLIENTID_CONFIRM",
2298 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2301 .op_func = (nfsd4op_func)nfsd4_verify,
2302 .op_name = "OP_VERIFY",
2303 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2306 .op_func = (nfsd4op_func)nfsd4_write,
2307 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2308 .op_name = "OP_WRITE",
2309 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2310 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
2312 [OP_RELEASE_LOCKOWNER] = {
2313 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
2314 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2315 | OP_MODIFIES_SOMETHING,
2316 .op_name = "OP_RELEASE_LOCKOWNER",
2317 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2320 /* NFSv4.1 operations */
2321 [OP_EXCHANGE_ID] = {
2322 .op_func = (nfsd4op_func)nfsd4_exchange_id,
2323 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2324 | OP_MODIFIES_SOMETHING,
2325 .op_name = "OP_EXCHANGE_ID",
2326 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
2328 [OP_BACKCHANNEL_CTL] = {
2329 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2330 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2331 .op_name = "OP_BACKCHANNEL_CTL",
2332 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2334 [OP_BIND_CONN_TO_SESSION] = {
2335 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
2336 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2337 | OP_MODIFIES_SOMETHING,
2338 .op_name = "OP_BIND_CONN_TO_SESSION",
2339 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
2341 [OP_CREATE_SESSION] = {
2342 .op_func = (nfsd4op_func)nfsd4_create_session,
2343 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2344 | OP_MODIFIES_SOMETHING,
2345 .op_name = "OP_CREATE_SESSION",
2346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
2348 [OP_DESTROY_SESSION] = {
2349 .op_func = (nfsd4op_func)nfsd4_destroy_session,
2350 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2351 | OP_MODIFIES_SOMETHING,
2352 .op_name = "OP_DESTROY_SESSION",
2353 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2356 .op_func = (nfsd4op_func)nfsd4_sequence,
2357 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2358 .op_name = "OP_SEQUENCE",
2359 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
2361 [OP_DESTROY_CLIENTID] = {
2362 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
2363 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2364 | OP_MODIFIES_SOMETHING,
2365 .op_name = "OP_DESTROY_CLIENTID",
2366 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2368 [OP_RECLAIM_COMPLETE] = {
2369 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
2370 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2371 .op_name = "OP_RECLAIM_COMPLETE",
2372 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2374 [OP_SECINFO_NO_NAME] = {
2375 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
2376 .op_flags = OP_HANDLES_WRONGSEC,
2377 .op_name = "OP_SECINFO_NO_NAME",
2378 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize,
2380 [OP_TEST_STATEID] = {
2381 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2382 .op_flags = ALLOWED_WITHOUT_FH,
2383 .op_name = "OP_TEST_STATEID",
2384 .op_rsize_bop = (nfsd4op_rsize)nfsd4_test_stateid_rsize,
2386 [OP_FREE_STATEID] = {
2387 .op_func = (nfsd4op_func)nfsd4_free_stateid,
2388 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2389 .op_name = "OP_FREE_STATEID",
2390 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
2391 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2393 #ifdef CONFIG_NFSD_PNFS
2394 [OP_GETDEVICEINFO] = {
2395 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2396 .op_flags = ALLOWED_WITHOUT_FH,
2397 .op_name = "OP_GETDEVICEINFO",
2398 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getdeviceinfo_rsize,
2401 .op_func = (nfsd4op_func)nfsd4_layoutget,
2402 .op_flags = OP_MODIFIES_SOMETHING,
2403 .op_name = "OP_LAYOUTGET",
2404 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2406 [OP_LAYOUTCOMMIT] = {
2407 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2408 .op_flags = OP_MODIFIES_SOMETHING,
2409 .op_name = "OP_LAYOUTCOMMIT",
2410 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2412 [OP_LAYOUTRETURN] = {
2413 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2414 .op_flags = OP_MODIFIES_SOMETHING,
2415 .op_name = "OP_LAYOUTRETURN",
2416 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2418 #endif /* CONFIG_NFSD_PNFS */
2420 /* NFSv4.2 operations */
2422 .op_func = (nfsd4op_func)nfsd4_allocate,
2423 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2424 .op_name = "OP_ALLOCATE",
2425 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2428 .op_func = (nfsd4op_func)nfsd4_deallocate,
2429 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2430 .op_name = "OP_DEALLOCATE",
2431 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2434 .op_func = (nfsd4op_func)nfsd4_clone,
2435 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2436 .op_name = "OP_CLONE",
2437 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2440 .op_func = (nfsd4op_func)nfsd4_copy,
2441 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2442 .op_name = "OP_COPY",
2443 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2446 .op_func = (nfsd4op_func)nfsd4_seek,
2447 .op_name = "OP_SEEK",
2448 .op_rsize_bop = (nfsd4op_rsize)nfsd4_seek_rsize,
2453 * nfsd4_spo_must_allow - Determine if the compound op contains an
2454 * operation that is allowed to be sent with machine credentials
2456 * @rqstp: a pointer to the struct svc_rqst
2458 * Checks to see if the compound contains a spo_must_allow op
2459 * and confirms that it was sent with the proper machine creds.
2462 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2464 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2465 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2466 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2467 struct nfsd4_compound_state *cstate = &resp->cstate;
2468 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2471 if (!cstate->minorversion)
2474 if (cstate->spo_must_allowed == true)
2477 opiter = resp->opcnt;
2478 while (opiter < argp->opcnt) {
2479 this = &argp->ops[opiter++];
2480 if (test_bit(this->opnum, allow->u.longs) &&
2481 cstate->clp->cl_mach_cred &&
2482 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2483 cstate->spo_must_allowed = true;
2487 cstate->spo_must_allowed = false;
2491 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2493 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2494 return op_encode_hdr_size * sizeof(__be32);
2496 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2497 return OPDESC(op)->op_rsize_bop(rqstp, op);
2500 void warn_on_nonidempotent_op(struct nfsd4_op *op)
2502 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2503 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2504 op->opnum, nfsd4_op_name(op->opnum));
2509 static const char *nfsd4_op_name(unsigned opnum)
2511 if (opnum < ARRAY_SIZE(nfsd4_ops))
2512 return nfsd4_ops[opnum].op_name;
2513 return "unknown_operation";
2516 #define nfsd4_voidres nfsd4_voidargs
2517 struct nfsd4_voidargs { int dummy; };
2519 static struct svc_procedure nfsd_procedures4[2] = {
2521 .pc_func = nfsd4_proc_null,
2522 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2523 .pc_argsize = sizeof(struct nfsd4_voidargs),
2524 .pc_ressize = sizeof(struct nfsd4_voidres),
2525 .pc_cachetype = RC_NOCACHE,
2528 [NFSPROC4_COMPOUND] = {
2529 .pc_func = nfsd4_proc_compound,
2530 .pc_decode = nfs4svc_decode_compoundargs,
2531 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2532 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2533 .pc_ressize = sizeof(struct nfsd4_compoundres),
2534 .pc_release = nfsd4_release_compoundargs,
2535 .pc_cachetype = RC_NOCACHE,
2536 .pc_xdrressize = NFSD_BUFSIZE/4,
2540 struct svc_version nfsd_version4 = {
2543 .vs_proc = nfsd_procedures4,
2544 .vs_dispatch = nfsd_dispatch,
2545 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2546 .vs_rpcb_optnl = true,
2547 .vs_need_cong_ctrl = true,