4 * Server-side procedures for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/file.h>
43 #define NFSDDBG_FACILITY NFSDDBG_PROC
45 static u32 nfsd_attrmask[] = {
46 NFSD_WRITEABLE_ATTRS_WORD0,
47 NFSD_WRITEABLE_ATTRS_WORD1,
48 NFSD_WRITEABLE_ATTRS_WORD2
51 static u32 nfsd41_ex_attrmask[] = {
52 NFSD_SUPPATTR_EXCLCREAT_WORD0,
53 NFSD_SUPPATTR_EXCLCREAT_WORD1,
54 NFSD_SUPPATTR_EXCLCREAT_WORD2
58 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
59 u32 *bmval, u32 *writable)
61 struct dentry *dentry = cstate->current_fh.fh_dentry;
64 * Check about attributes are supported by the NFSv4 server or not.
65 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
67 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
68 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
69 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
70 return nfserr_attrnotsupp;
73 * Check FATTR4_WORD0_ACL can be supported
74 * in current environment or not.
76 if (bmval[0] & FATTR4_WORD0_ACL) {
77 if (!IS_POSIXACL(dentry->d_inode))
78 return nfserr_attrnotsupp;
82 * According to spec, read-only attributes return ERR_INVAL.
85 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
86 (bmval[2] & ~writable[2]))
94 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
95 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
97 __be32 status = nfs_ok;
99 if (open->op_create == NFS4_OPEN_CREATE) {
100 if (open->op_createmode == NFS4_CREATE_UNCHECKED
101 || open->op_createmode == NFS4_CREATE_GUARDED)
102 status = check_attr_support(rqstp, cstate,
103 open->op_bmval, nfsd_attrmask);
104 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
105 status = check_attr_support(rqstp, cstate,
106 open->op_bmval, nfsd41_ex_attrmask);
113 is_create_with_attrs(struct nfsd4_open *open)
115 return open->op_create == NFS4_OPEN_CREATE
116 && (open->op_createmode == NFS4_CREATE_UNCHECKED
117 || open->op_createmode == NFS4_CREATE_GUARDED
118 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
122 * if error occurs when setting the acl, just clear the acl bit
123 * in the returned attr bitmap.
126 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
127 struct nfs4_acl *acl, u32 *bmval)
131 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
134 * We should probably fail the whole open at this point,
135 * but we've already created the file, so it's too late;
136 * So this seems the least of evils:
138 bmval[0] &= ~FATTR4_WORD0_ACL;
142 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
145 dget(src->fh_dentry);
147 cache_get(&src->fh_export->h);
152 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
156 if (open->op_truncate &&
157 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
160 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
161 accmode |= NFSD_MAY_READ;
162 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
163 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
164 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
165 accmode |= NFSD_MAY_WRITE;
167 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
173 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
179 fh_init(&resfh, NFS4_FHSIZE);
180 open->op_truncate = 0;
182 if (open->op_create) {
183 /* FIXME: check session persistence and pnfs flags.
184 * The nfsv4.1 spec requires the following semantics:
186 * Persistent | pNFS | Server REQUIRED | Client Allowed
187 * Reply Cache | server | |
188 * -------------+--------+-----------------+--------------------
189 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
191 * | | and EXCLUSIVE4 | or EXCLUSIVE4
193 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
194 * yes | no | GUARDED4 | GUARDED4
195 * yes | yes | GUARDED4 | GUARDED4
199 * Note: create modes (UNCHECKED,GUARDED...) are the same
202 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
203 open->op_fname.len, &open->op_iattr,
204 &resfh, open->op_createmode,
205 (u32 *)open->op_verf.data,
206 &open->op_truncate, &created);
209 * Following rfc 3530 14.2.16, use the returned bitmask
210 * to indicate which attributes we used to store the
213 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
214 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
215 FATTR4_WORD1_TIME_MODIFY);
217 status = nfsd_lookup(rqstp, current_fh,
218 open->op_fname.data, open->op_fname.len, &resfh);
219 fh_unlock(current_fh);
224 if (is_create_with_attrs(open) && open->op_acl != NULL)
225 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
227 set_change_info(&open->op_cinfo, current_fh);
228 fh_dup2(current_fh, &resfh);
230 /* set reply cache */
231 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
234 status = do_open_permission(rqstp, current_fh, open,
243 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
247 /* Only reclaims from previously confirmed clients are valid */
248 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
251 /* We don't know the target directory, and therefore can not
252 * set the change info
255 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
257 /* set replay cache */
258 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
259 ¤t_fh->fh_handle);
261 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
262 (open->op_iattr.ia_size == 0);
264 status = do_open_permission(rqstp, current_fh, open,
265 NFSD_MAY_OWNER_OVERRIDE);
271 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
273 struct nfsd4_sessionid *sid =
274 (struct nfsd4_sessionid *)session->se_sessionid.data;
276 clid->cl_boot = sid->clientid.cl_boot;
277 clid->cl_id = sid->clientid.cl_id;
281 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
282 struct nfsd4_open *open)
285 struct nfsd4_compoundres *resp;
287 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
288 (int)open->op_fname.len, open->op_fname.data,
289 open->op_stateowner);
291 /* This check required by spec. */
292 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
295 if (nfsd4_has_session(cstate))
296 copy_clientid(&open->op_clientid, cstate->session);
300 /* check seqid for replay. set nfs4_owner */
301 resp = rqstp->rq_resp;
302 status = nfsd4_process_open1(&resp->cstate, open);
303 if (status == nfserr_replay_me) {
304 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
305 fh_put(&cstate->current_fh);
306 fh_copy_shallow(&cstate->current_fh.fh_handle,
308 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
310 dprintk("nfsd4_open: replay failed"
311 " restoring previous filehandle\n");
313 status = nfserr_replay_me;
318 status = nfsd4_check_open_attributes(rqstp, cstate, open);
322 /* Openowner is now set, so sequence id will get bumped. Now we need
323 * these checks before we do any creates: */
324 status = nfserr_grace;
325 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
327 status = nfserr_no_grace;
328 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
331 switch (open->op_claim_type) {
332 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
333 case NFS4_OPEN_CLAIM_NULL:
335 * (1) set CURRENT_FH to the file being opened,
336 * creating it if necessary, (2) set open->op_cinfo,
337 * (3) set open->op_truncate if the file is to be
338 * truncated after opening, (4) do permission checking.
340 status = do_open_lookup(rqstp, &cstate->current_fh,
345 case NFS4_OPEN_CLAIM_PREVIOUS:
346 open->op_stateowner->so_confirmed = 1;
348 * The CURRENT_FH is already set to the file being
349 * opened. (1) set open->op_cinfo, (2) set
350 * open->op_truncate if the file is to be truncated
351 * after opening, (3) do permission checking.
353 status = do_open_fhandle(rqstp, &cstate->current_fh,
358 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
359 open->op_stateowner->so_confirmed = 1;
360 dprintk("NFSD: unsupported OPEN claim type %d\n",
361 open->op_claim_type);
362 status = nfserr_notsupp;
365 dprintk("NFSD: Invalid OPEN claim type %d\n",
366 open->op_claim_type);
367 status = nfserr_inval;
371 * nfsd4_process_open2() does the actual opening of the file. If
372 * successful, it (1) truncates the file if open->op_truncate was
373 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
375 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
377 if (open->op_stateowner) {
378 nfs4_get_stateowner(open->op_stateowner);
379 cstate->replay_owner = open->op_stateowner;
386 * filehandle-manipulating ops.
389 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
390 struct svc_fh **getfh)
392 if (!cstate->current_fh.fh_dentry)
393 return nfserr_nofilehandle;
395 *getfh = &cstate->current_fh;
400 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
401 struct nfsd4_putfh *putfh)
403 fh_put(&cstate->current_fh);
404 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
405 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
407 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
411 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
416 fh_put(&cstate->current_fh);
417 status = exp_pseudoroot(rqstp, &cstate->current_fh);
422 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
425 if (!cstate->save_fh.fh_dentry)
426 return nfserr_restorefh;
428 fh_dup2(&cstate->current_fh, &cstate->save_fh);
433 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
436 if (!cstate->current_fh.fh_dentry)
437 return nfserr_nofilehandle;
439 fh_dup2(&cstate->save_fh, &cstate->current_fh);
447 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
448 struct nfsd4_access *access)
450 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
453 access->ac_resp_access = access->ac_req_access;
454 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
455 &access->ac_supported);
459 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
460 struct nfsd4_commit *commit)
464 u32 *p = (u32 *)commit->co_verf.data;
465 *p++ = nfssvc_boot.tv_sec;
466 *p++ = nfssvc_boot.tv_usec;
468 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
470 if (status == nfserr_symlink)
471 status = nfserr_inval;
476 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
477 struct nfsd4_create *create)
483 fh_init(&resfh, NFS4_FHSIZE);
485 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
487 if (status == nfserr_symlink)
488 status = nfserr_notdir;
492 status = check_attr_support(rqstp, cstate, create->cr_bmval,
497 switch (create->cr_type) {
499 /* ugh! we have to null-terminate the linktext, or
500 * vfs_symlink() will choke. it is always safe to
501 * null-terminate by brute force, since at worst we
502 * will overwrite the first byte of the create namelen
503 * in the XDR buffer, which has already been extracted
506 create->cr_linkname[create->cr_linklen] = 0;
508 status = nfsd_symlink(rqstp, &cstate->current_fh,
509 create->cr_name, create->cr_namelen,
510 create->cr_linkname, create->cr_linklen,
511 &resfh, &create->cr_iattr);
515 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
516 if (MAJOR(rdev) != create->cr_specdata1 ||
517 MINOR(rdev) != create->cr_specdata2)
519 status = nfsd_create(rqstp, &cstate->current_fh,
520 create->cr_name, create->cr_namelen,
521 &create->cr_iattr, S_IFBLK, rdev, &resfh);
525 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
526 if (MAJOR(rdev) != create->cr_specdata1 ||
527 MINOR(rdev) != create->cr_specdata2)
529 status = nfsd_create(rqstp, &cstate->current_fh,
530 create->cr_name, create->cr_namelen,
531 &create->cr_iattr,S_IFCHR, rdev, &resfh);
535 status = nfsd_create(rqstp, &cstate->current_fh,
536 create->cr_name, create->cr_namelen,
537 &create->cr_iattr, S_IFSOCK, 0, &resfh);
541 status = nfsd_create(rqstp, &cstate->current_fh,
542 create->cr_name, create->cr_namelen,
543 &create->cr_iattr, S_IFIFO, 0, &resfh);
547 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
548 status = nfsd_create(rqstp, &cstate->current_fh,
549 create->cr_name, create->cr_namelen,
550 &create->cr_iattr, S_IFDIR, 0, &resfh);
554 status = nfserr_badtype;
560 if (create->cr_acl != NULL)
561 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
564 fh_unlock(&cstate->current_fh);
565 set_change_info(&create->cr_cinfo, &cstate->current_fh);
566 fh_dup2(&cstate->current_fh, &resfh);
573 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
574 struct nfsd4_getattr *getattr)
578 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
582 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
585 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
586 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
587 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
589 getattr->ga_fhp = &cstate->current_fh;
594 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
595 struct nfsd4_link *link)
597 __be32 status = nfserr_nofilehandle;
599 if (!cstate->save_fh.fh_dentry)
601 status = nfsd_link(rqstp, &cstate->current_fh,
602 link->li_name, link->li_namelen, &cstate->save_fh);
604 set_change_info(&link->li_cinfo, &cstate->current_fh);
609 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
612 struct svc_fh tmp_fh;
615 fh_init(&tmp_fh, NFS4_FHSIZE);
616 ret = exp_pseudoroot(rqstp, &tmp_fh);
619 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
624 return nfsd_lookup(rqstp, &cstate->current_fh,
625 "..", 2, &cstate->current_fh);
629 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
630 struct nfsd4_lookup *lookup)
632 return nfsd_lookup(rqstp, &cstate->current_fh,
633 lookup->lo_name, lookup->lo_len,
634 &cstate->current_fh);
638 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
639 struct nfsd4_read *read)
643 /* no need to check permission - this will be done in nfsd_read() */
645 read->rd_filp = NULL;
646 if (read->rd_offset >= OFFSET_MAX)
651 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
652 RD_STATE, &read->rd_filp))) {
653 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
657 get_file(read->rd_filp);
661 read->rd_rqstp = rqstp;
662 read->rd_fhp = &cstate->current_fh;
667 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
668 struct nfsd4_readdir *readdir)
670 u64 cookie = readdir->rd_cookie;
671 static const nfs4_verifier zeroverf;
673 /* no need to check permission - this will be done in nfsd_readdir() */
675 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
678 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
679 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
680 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
682 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
683 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
684 return nfserr_bad_cookie;
686 readdir->rd_rqstp = rqstp;
687 readdir->rd_fhp = &cstate->current_fh;
692 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
693 struct nfsd4_readlink *readlink)
695 readlink->rl_rqstp = rqstp;
696 readlink->rl_fhp = &cstate->current_fh;
701 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
702 struct nfsd4_remove *remove)
706 if (locks_in_grace())
708 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
709 remove->rm_name, remove->rm_namelen);
710 if (status == nfserr_symlink)
711 return nfserr_notdir;
713 fh_unlock(&cstate->current_fh);
714 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
720 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
721 struct nfsd4_rename *rename)
723 __be32 status = nfserr_nofilehandle;
725 if (!cstate->save_fh.fh_dentry)
727 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
728 & NFSEXP_NOSUBTREECHECK))
730 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
731 rename->rn_snamelen, &cstate->current_fh,
732 rename->rn_tname, rename->rn_tnamelen);
734 /* the underlying filesystem returns different error's than required
735 * by NFSv4. both save_fh and current_fh have been verified.. */
736 if (status == nfserr_isdir)
737 status = nfserr_exist;
738 else if ((status == nfserr_notdir) &&
739 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
740 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
741 status = nfserr_exist;
742 else if (status == nfserr_symlink)
743 status = nfserr_notdir;
746 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
747 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
753 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
754 struct nfsd4_secinfo *secinfo)
757 struct svc_export *exp;
758 struct dentry *dentry;
761 fh_init(&resfh, NFS4_FHSIZE);
762 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
763 secinfo->si_name, secinfo->si_namelen,
767 if (dentry->d_inode == NULL) {
771 secinfo->si_exp = exp;
777 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
778 struct nfsd4_setattr *setattr)
780 __be32 status = nfs_ok;
782 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
784 status = nfs4_preprocess_stateid_op(cstate,
785 &setattr->sa_stateid, WR_STATE, NULL);
788 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
792 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
797 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
802 if (setattr->sa_acl != NULL)
803 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
807 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
810 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
815 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
816 struct nfsd4_write *write)
818 stateid_t *stateid = &write->wr_stateid;
819 struct file *filp = NULL;
821 __be32 status = nfs_ok;
824 /* no need to check permission - this will be done in nfsd_write() */
826 if (write->wr_offset >= OFFSET_MAX)
830 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
836 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
840 cnt = write->wr_buflen;
841 write->wr_how_written = write->wr_stable_how;
842 p = (u32 *)write->wr_verifier.data;
843 *p++ = nfssvc_boot.tv_sec;
844 *p++ = nfssvc_boot.tv_usec;
846 status = nfsd_write(rqstp, &cstate->current_fh, filp,
847 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
848 &cnt, &write->wr_how_written);
852 write->wr_bytes_written = cnt;
854 if (status == nfserr_symlink)
855 status = nfserr_inval;
859 /* This routine never returns NFS_OK! If there are no other errors, it
860 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
861 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
862 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
865 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
866 struct nfsd4_verify *verify)
872 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
876 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
880 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
881 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
883 if (verify->ve_attrlen & 3)
887 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
889 count = 4 + (verify->ve_attrlen >> 2);
890 buf = kmalloc(count << 2, GFP_KERNEL);
892 return nfserr_resource;
894 status = nfsd4_encode_fattr(&cstate->current_fh,
895 cstate->current_fh.fh_export,
896 cstate->current_fh.fh_dentry, buf,
897 &count, verify->ve_bmval,
900 /* this means that nfsd4_encode_fattr() ran out of space */
901 if (status == nfserr_resource && count == 0)
902 status = nfserr_not_same;
907 p = buf + 1 + ntohl(buf[0]);
908 status = nfserr_not_same;
909 if (ntohl(*p++) != verify->ve_attrlen)
911 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
912 status = nfserr_same;
920 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
921 struct nfsd4_verify *verify)
925 status = _nfsd4_verify(rqstp, cstate, verify);
926 return status == nfserr_not_same ? nfs_ok : status;
930 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
931 struct nfsd4_verify *verify)
935 status = _nfsd4_verify(rqstp, cstate, verify);
936 return status == nfserr_same ? nfs_ok : status;
943 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
948 static inline void nfsd4_increment_op_stats(u32 opnum)
950 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
951 nfsdstats.nfs4_opcount[opnum]++;
954 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
956 enum nfsd4_op_flags {
957 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
958 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */
959 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */
962 struct nfsd4_operation {
963 nfsd4op_func op_func;
968 static struct nfsd4_operation nfsd4_ops[];
970 static const char *nfsd4_op_name(unsigned opnum);
973 * Enforce NFSv4.1 COMPOUND ordering rules.
976 * - enforce NFS4ERR_NOT_ONLY_OP,
977 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
979 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
981 if (args->minorversion && args->opcnt > 0) {
982 struct nfsd4_op *op = &args->ops[0];
983 return (op->status == nfserr_op_illegal) ||
984 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
993 nfsd4_proc_compound(struct svc_rqst *rqstp,
994 struct nfsd4_compoundargs *args,
995 struct nfsd4_compoundres *resp)
998 struct nfsd4_operation *opdesc;
999 struct nfsd4_compound_state *cstate = &resp->cstate;
1003 resp->xbuf = &rqstp->rq_res;
1004 resp->p = rqstp->rq_res.head[0].iov_base +
1005 rqstp->rq_res.head[0].iov_len;
1006 resp->tagp = resp->p;
1007 /* reserve space for: taglen, tag, and opcnt */
1008 resp->p += 2 + XDR_QUADLEN(args->taglen);
1009 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1010 resp->taglen = args->taglen;
1011 resp->tag = args->tag;
1013 resp->rqstp = rqstp;
1014 resp->cstate.minorversion = args->minorversion;
1015 resp->cstate.replay_owner = NULL;
1016 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1017 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1018 /* Use the deferral mechanism only for NFSv4.0 compounds */
1019 rqstp->rq_usedeferral = (args->minorversion == 0);
1022 * According to RFC3010, this takes precedence over all other errors.
1024 status = nfserr_minor_vers_mismatch;
1025 if (args->minorversion > nfsd_supported_minorversion)
1028 if (!nfs41_op_ordering_ok(args)) {
1030 op->status = nfserr_sequence_pos;
1035 while (!status && resp->opcnt < args->opcnt) {
1036 op = &args->ops[resp->opcnt++];
1038 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1039 resp->opcnt, args->opcnt, op->opnum,
1040 nfsd4_op_name(op->opnum));
1042 * The XDR decode routines may have pre-set op->status;
1043 * for example, if there is a miscellaneous XDR error
1044 * it will be set to nfserr_bad_xdr.
1049 /* We must be able to encode a successful response to
1050 * this operation, with enough room left over to encode a
1051 * failed response to the next operation. If we don't
1052 * have enough room, fail with ERR_RESOURCE.
1054 slack_bytes = (char *)resp->end - (char *)resp->p;
1055 if (slack_bytes < COMPOUND_SLACK_SPACE
1056 + COMPOUND_ERR_SLACK_SPACE) {
1057 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1058 op->status = nfserr_resource;
1062 opdesc = &nfsd4_ops[op->opnum];
1064 if (!cstate->current_fh.fh_dentry) {
1065 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1066 op->status = nfserr_nofilehandle;
1069 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1070 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1071 op->status = nfserr_moved;
1075 if (opdesc->op_func)
1076 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1078 BUG_ON(op->status == nfs_ok);
1081 /* Only from SEQUENCE */
1082 if (resp->cstate.status == nfserr_replay_cache) {
1083 dprintk("%s NFS4.1 replay from cache\n", __func__);
1084 status = op->status;
1087 if (op->status == nfserr_replay_me) {
1088 op->replay = &cstate->replay_owner->so_replay;
1089 nfsd4_encode_replay(resp, op);
1090 status = op->status = op->replay->rp_status;
1092 nfsd4_encode_operation(resp, op);
1093 status = op->status;
1096 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1097 args->ops, args->opcnt, resp->opcnt, op->opnum,
1098 be32_to_cpu(status));
1100 if (cstate->replay_owner) {
1101 nfs4_put_stateowner(cstate->replay_owner);
1102 cstate->replay_owner = NULL;
1104 /* XXX Ugh, we need to get rid of this kind of special case: */
1105 if (op->opnum == OP_READ && op->u.read.rd_filp)
1106 fput(op->u.read.rd_filp);
1108 nfsd4_increment_op_stats(op->opnum);
1110 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1111 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1112 status = nfserr_jukebox;
1115 resp->cstate.status = status;
1116 fh_put(&resp->cstate.current_fh);
1117 fh_put(&resp->cstate.save_fh);
1118 BUG_ON(resp->cstate.replay_owner);
1120 nfsd4_release_compoundargs(args);
1121 /* Reset deferral mechanism for RPC deferrals */
1122 rqstp->rq_usedeferral = 1;
1123 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1127 static struct nfsd4_operation nfsd4_ops[] = {
1129 .op_func = (nfsd4op_func)nfsd4_access,
1130 .op_name = "OP_ACCESS",
1133 .op_func = (nfsd4op_func)nfsd4_close,
1134 .op_name = "OP_CLOSE",
1137 .op_func = (nfsd4op_func)nfsd4_commit,
1138 .op_name = "OP_COMMIT",
1141 .op_func = (nfsd4op_func)nfsd4_create,
1142 .op_name = "OP_CREATE",
1144 [OP_DELEGRETURN] = {
1145 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1146 .op_name = "OP_DELEGRETURN",
1149 .op_func = (nfsd4op_func)nfsd4_getattr,
1150 .op_flags = ALLOWED_ON_ABSENT_FS,
1151 .op_name = "OP_GETATTR",
1154 .op_func = (nfsd4op_func)nfsd4_getfh,
1155 .op_name = "OP_GETFH",
1158 .op_func = (nfsd4op_func)nfsd4_link,
1159 .op_name = "OP_LINK",
1162 .op_func = (nfsd4op_func)nfsd4_lock,
1163 .op_name = "OP_LOCK",
1166 .op_func = (nfsd4op_func)nfsd4_lockt,
1167 .op_name = "OP_LOCKT",
1170 .op_func = (nfsd4op_func)nfsd4_locku,
1171 .op_name = "OP_LOCKU",
1174 .op_func = (nfsd4op_func)nfsd4_lookup,
1175 .op_name = "OP_LOOKUP",
1178 .op_func = (nfsd4op_func)nfsd4_lookupp,
1179 .op_name = "OP_LOOKUPP",
1182 .op_func = (nfsd4op_func)nfsd4_nverify,
1183 .op_name = "OP_NVERIFY",
1186 .op_func = (nfsd4op_func)nfsd4_open,
1187 .op_name = "OP_OPEN",
1189 [OP_OPEN_CONFIRM] = {
1190 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1191 .op_name = "OP_OPEN_CONFIRM",
1193 [OP_OPEN_DOWNGRADE] = {
1194 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1195 .op_name = "OP_OPEN_DOWNGRADE",
1198 .op_func = (nfsd4op_func)nfsd4_putfh,
1199 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1200 .op_name = "OP_PUTFH",
1203 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1204 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1205 .op_name = "OP_PUTPUBFH",
1208 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1209 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1210 .op_name = "OP_PUTROOTFH",
1213 .op_func = (nfsd4op_func)nfsd4_read,
1214 .op_name = "OP_READ",
1217 .op_func = (nfsd4op_func)nfsd4_readdir,
1218 .op_name = "OP_READDIR",
1221 .op_func = (nfsd4op_func)nfsd4_readlink,
1222 .op_name = "OP_READLINK",
1225 .op_func = (nfsd4op_func)nfsd4_remove,
1226 .op_name = "OP_REMOVE",
1229 .op_name = "OP_RENAME",
1230 .op_func = (nfsd4op_func)nfsd4_rename,
1233 .op_func = (nfsd4op_func)nfsd4_renew,
1234 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1235 .op_name = "OP_RENEW",
1238 .op_func = (nfsd4op_func)nfsd4_restorefh,
1239 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1240 .op_name = "OP_RESTOREFH",
1243 .op_func = (nfsd4op_func)nfsd4_savefh,
1244 .op_name = "OP_SAVEFH",
1247 .op_func = (nfsd4op_func)nfsd4_secinfo,
1248 .op_name = "OP_SECINFO",
1251 .op_func = (nfsd4op_func)nfsd4_setattr,
1252 .op_name = "OP_SETATTR",
1254 [OP_SETCLIENTID] = {
1255 .op_func = (nfsd4op_func)nfsd4_setclientid,
1256 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1257 .op_name = "OP_SETCLIENTID",
1259 [OP_SETCLIENTID_CONFIRM] = {
1260 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1261 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1262 .op_name = "OP_SETCLIENTID_CONFIRM",
1265 .op_func = (nfsd4op_func)nfsd4_verify,
1266 .op_name = "OP_VERIFY",
1269 .op_func = (nfsd4op_func)nfsd4_write,
1270 .op_name = "OP_WRITE",
1272 [OP_RELEASE_LOCKOWNER] = {
1273 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1274 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1275 .op_name = "OP_RELEASE_LOCKOWNER",
1278 /* NFSv4.1 operations */
1279 [OP_EXCHANGE_ID] = {
1280 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1281 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1282 .op_name = "OP_EXCHANGE_ID",
1284 [OP_CREATE_SESSION] = {
1285 .op_func = (nfsd4op_func)nfsd4_create_session,
1286 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1287 .op_name = "OP_CREATE_SESSION",
1289 [OP_DESTROY_SESSION] = {
1290 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1291 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1292 .op_name = "OP_DESTROY_SESSION",
1295 .op_func = (nfsd4op_func)nfsd4_sequence,
1296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1297 .op_name = "OP_SEQUENCE",
1301 static const char *nfsd4_op_name(unsigned opnum)
1303 if (opnum < ARRAY_SIZE(nfsd4_ops))
1304 return nfsd4_ops[opnum].op_name;
1305 return "unknown_operation";
1308 #define nfsd4_voidres nfsd4_voidargs
1309 struct nfsd4_voidargs { int dummy; };
1312 * TODO: At the present time, the NFSv4 server does not do XID caching
1313 * of requests. Implementing XID caching would not be a serious problem,
1314 * although it would require a mild change in interfaces since one
1315 * doesn't know whether an NFSv4 request is idempotent until after the
1316 * XDR decode. However, XID caching totally confuses pynfs (Peter
1317 * Astrand's regression testsuite for NFSv4 servers), which reuses
1318 * XID's liberally, so I've left it unimplemented until pynfs generates
1321 static struct svc_procedure nfsd_procedures4[2] = {
1323 .pc_func = (svc_procfunc) nfsd4_proc_null,
1324 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1325 .pc_argsize = sizeof(struct nfsd4_voidargs),
1326 .pc_ressize = sizeof(struct nfsd4_voidres),
1327 .pc_cachetype = RC_NOCACHE,
1330 [NFSPROC4_COMPOUND] = {
1331 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1332 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1333 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1334 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1335 .pc_ressize = sizeof(struct nfsd4_compoundres),
1336 .pc_cachetype = RC_NOCACHE,
1337 .pc_xdrressize = NFSD_BUFSIZE/4,
1341 struct svc_version nfsd_version4 = {
1344 .vs_proc = nfsd_procedures4,
1345 .vs_dispatch = nfsd_dispatch,
1346 .vs_xdrsize = NFS4_SVC_XDRSIZE,