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.
38 #include <linux/param.h>
39 #include <linux/major.h>
40 #include <linux/slab.h>
41 #include <linux/file.h>
43 #include <linux/sunrpc/svc.h>
44 #include <linux/nfsd/nfsd.h>
45 #include <linux/nfsd/cache.h>
46 #include <linux/nfs4.h>
47 #include <linux/nfsd/state.h>
48 #include <linux/nfsd/xdr4.h>
49 #include <linux/nfs4_acl.h>
50 #include <linux/sunrpc/gss_api.h>
53 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 static u32 nfsd_attrmask[] = {
56 NFSD_WRITEABLE_ATTRS_WORD0,
57 NFSD_WRITEABLE_ATTRS_WORD1,
58 NFSD_WRITEABLE_ATTRS_WORD2
61 static u32 nfsd41_ex_attrmask[] = {
62 NFSD_SUPPATTR_EXCLCREAT_WORD0,
63 NFSD_SUPPATTR_EXCLCREAT_WORD1,
64 NFSD_SUPPATTR_EXCLCREAT_WORD2
68 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
69 u32 *bmval, u32 *writable)
71 struct dentry *dentry = cstate->current_fh.fh_dentry;
74 * Check about attributes are supported by the NFSv4 server or not.
75 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
77 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
78 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
79 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
80 return nfserr_attrnotsupp;
83 * Check FATTR4_WORD0_ACL can be supported
84 * in current environment or not.
86 if (bmval[0] & FATTR4_WORD0_ACL) {
87 if (!IS_POSIXACL(dentry->d_inode))
88 return nfserr_attrnotsupp;
92 * According to spec, read-only attributes return ERR_INVAL.
95 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
96 (bmval[2] & ~writable[2]))
104 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
105 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
107 __be32 status = nfs_ok;
109 if (open->op_create == NFS4_OPEN_CREATE) {
110 if (open->op_createmode == NFS4_CREATE_UNCHECKED
111 || open->op_createmode == NFS4_CREATE_GUARDED)
112 status = check_attr_support(rqstp, cstate,
113 open->op_bmval, nfsd_attrmask);
114 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
115 status = check_attr_support(rqstp, cstate,
116 open->op_bmval, nfsd41_ex_attrmask);
123 is_create_with_attrs(struct nfsd4_open *open)
125 return open->op_create == NFS4_OPEN_CREATE
126 && (open->op_createmode == NFS4_CREATE_UNCHECKED
127 || open->op_createmode == NFS4_CREATE_GUARDED
128 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
132 * if error occurs when setting the acl, just clear the acl bit
133 * in the returned attr bitmap.
136 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
137 struct nfs4_acl *acl, u32 *bmval)
141 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
144 * We should probably fail the whole open at this point,
145 * but we've already created the file, so it's too late;
146 * So this seems the least of evils:
148 bmval[0] &= ~FATTR4_WORD0_ACL;
152 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
155 dget(src->fh_dentry);
157 cache_get(&src->fh_export->h);
162 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
166 if (open->op_truncate &&
167 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
170 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
171 accmode |= NFSD_MAY_READ;
172 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
173 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
174 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
175 accmode |= NFSD_MAY_WRITE;
177 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
183 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
189 fh_init(&resfh, NFS4_FHSIZE);
190 open->op_truncate = 0;
192 if (open->op_create) {
193 /* FIXME: check session persistence and pnfs flags.
194 * The nfsv4.1 spec requires the following semantics:
196 * Persistent | pNFS | Server REQUIRED | Client Allowed
197 * Reply Cache | server | |
198 * -------------+--------+-----------------+--------------------
199 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
201 * | | and EXCLUSIVE4 | or EXCLUSIVE4
203 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
204 * yes | no | GUARDED4 | GUARDED4
205 * yes | yes | GUARDED4 | GUARDED4
209 * Note: create modes (UNCHECKED,GUARDED...) are the same
212 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
213 open->op_fname.len, &open->op_iattr,
214 &resfh, open->op_createmode,
215 (u32 *)open->op_verf.data,
216 &open->op_truncate, &created);
219 * Following rfc 3530 14.2.16, use the returned bitmask
220 * to indicate which attributes we used to store the
223 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
224 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
225 FATTR4_WORD1_TIME_MODIFY);
227 status = nfsd_lookup(rqstp, current_fh,
228 open->op_fname.data, open->op_fname.len, &resfh);
229 fh_unlock(current_fh);
234 if (is_create_with_attrs(open) && open->op_acl != NULL)
235 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
237 set_change_info(&open->op_cinfo, current_fh);
238 fh_dup2(current_fh, &resfh);
240 /* set reply cache */
241 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
244 status = do_open_permission(rqstp, current_fh, open,
253 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
257 /* Only reclaims from previously confirmed clients are valid */
258 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
261 /* We don't know the target directory, and therefore can not
262 * set the change info
265 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
267 /* set replay cache */
268 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
269 ¤t_fh->fh_handle);
271 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
272 (open->op_iattr.ia_size == 0);
274 status = do_open_permission(rqstp, current_fh, open,
275 NFSD_MAY_OWNER_OVERRIDE);
281 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
283 struct nfsd4_sessionid *sid =
284 (struct nfsd4_sessionid *)session->se_sessionid.data;
286 clid->cl_boot = sid->clientid.cl_boot;
287 clid->cl_id = sid->clientid.cl_id;
291 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
292 struct nfsd4_open *open)
295 struct nfsd4_compoundres *resp;
297 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
298 (int)open->op_fname.len, open->op_fname.data,
299 open->op_stateowner);
301 /* This check required by spec. */
302 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
305 if (nfsd4_has_session(cstate))
306 copy_clientid(&open->op_clientid, cstate->session);
310 /* check seqid for replay. set nfs4_owner */
311 resp = rqstp->rq_resp;
312 status = nfsd4_process_open1(&resp->cstate, open);
313 if (status == nfserr_replay_me) {
314 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
315 fh_put(&cstate->current_fh);
316 fh_copy_shallow(&cstate->current_fh.fh_handle,
318 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
320 dprintk("nfsd4_open: replay failed"
321 " restoring previous filehandle\n");
323 status = nfserr_replay_me;
328 status = nfsd4_check_open_attributes(rqstp, cstate, open);
332 /* Openowner is now set, so sequence id will get bumped. Now we need
333 * these checks before we do any creates: */
334 status = nfserr_grace;
335 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
337 status = nfserr_no_grace;
338 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
341 switch (open->op_claim_type) {
342 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
343 case NFS4_OPEN_CLAIM_NULL:
345 * (1) set CURRENT_FH to the file being opened,
346 * creating it if necessary, (2) set open->op_cinfo,
347 * (3) set open->op_truncate if the file is to be
348 * truncated after opening, (4) do permission checking.
350 status = do_open_lookup(rqstp, &cstate->current_fh,
355 case NFS4_OPEN_CLAIM_PREVIOUS:
356 open->op_stateowner->so_confirmed = 1;
358 * The CURRENT_FH is already set to the file being
359 * opened. (1) set open->op_cinfo, (2) set
360 * open->op_truncate if the file is to be truncated
361 * after opening, (3) do permission checking.
363 status = do_open_fhandle(rqstp, &cstate->current_fh,
368 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
369 open->op_stateowner->so_confirmed = 1;
370 dprintk("NFSD: unsupported OPEN claim type %d\n",
371 open->op_claim_type);
372 status = nfserr_notsupp;
375 dprintk("NFSD: Invalid OPEN claim type %d\n",
376 open->op_claim_type);
377 status = nfserr_inval;
381 * nfsd4_process_open2() does the actual opening of the file. If
382 * successful, it (1) truncates the file if open->op_truncate was
383 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
385 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
387 if (open->op_stateowner) {
388 nfs4_get_stateowner(open->op_stateowner);
389 cstate->replay_owner = open->op_stateowner;
396 * filehandle-manipulating ops.
399 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
400 struct svc_fh **getfh)
402 if (!cstate->current_fh.fh_dentry)
403 return nfserr_nofilehandle;
405 *getfh = &cstate->current_fh;
410 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
411 struct nfsd4_putfh *putfh)
413 fh_put(&cstate->current_fh);
414 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
415 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
417 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
421 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
426 fh_put(&cstate->current_fh);
427 status = exp_pseudoroot(rqstp, &cstate->current_fh);
432 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
435 if (!cstate->save_fh.fh_dentry)
436 return nfserr_restorefh;
438 fh_dup2(&cstate->current_fh, &cstate->save_fh);
443 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
446 if (!cstate->current_fh.fh_dentry)
447 return nfserr_nofilehandle;
449 fh_dup2(&cstate->save_fh, &cstate->current_fh);
457 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
458 struct nfsd4_access *access)
460 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
463 access->ac_resp_access = access->ac_req_access;
464 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
465 &access->ac_supported);
469 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
470 struct nfsd4_commit *commit)
474 u32 *p = (u32 *)commit->co_verf.data;
475 *p++ = nfssvc_boot.tv_sec;
476 *p++ = nfssvc_boot.tv_usec;
478 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
480 if (status == nfserr_symlink)
481 status = nfserr_inval;
486 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
487 struct nfsd4_create *create)
493 fh_init(&resfh, NFS4_FHSIZE);
495 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
497 if (status == nfserr_symlink)
498 status = nfserr_notdir;
502 status = check_attr_support(rqstp, cstate, create->cr_bmval,
507 switch (create->cr_type) {
509 /* ugh! we have to null-terminate the linktext, or
510 * vfs_symlink() will choke. it is always safe to
511 * null-terminate by brute force, since at worst we
512 * will overwrite the first byte of the create namelen
513 * in the XDR buffer, which has already been extracted
516 create->cr_linkname[create->cr_linklen] = 0;
518 status = nfsd_symlink(rqstp, &cstate->current_fh,
519 create->cr_name, create->cr_namelen,
520 create->cr_linkname, create->cr_linklen,
521 &resfh, &create->cr_iattr);
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_IFBLK, rdev, &resfh);
535 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
536 if (MAJOR(rdev) != create->cr_specdata1 ||
537 MINOR(rdev) != create->cr_specdata2)
539 status = nfsd_create(rqstp, &cstate->current_fh,
540 create->cr_name, create->cr_namelen,
541 &create->cr_iattr,S_IFCHR, rdev, &resfh);
545 status = nfsd_create(rqstp, &cstate->current_fh,
546 create->cr_name, create->cr_namelen,
547 &create->cr_iattr, S_IFSOCK, 0, &resfh);
551 status = nfsd_create(rqstp, &cstate->current_fh,
552 create->cr_name, create->cr_namelen,
553 &create->cr_iattr, S_IFIFO, 0, &resfh);
557 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
558 status = nfsd_create(rqstp, &cstate->current_fh,
559 create->cr_name, create->cr_namelen,
560 &create->cr_iattr, S_IFDIR, 0, &resfh);
564 status = nfserr_badtype;
570 if (create->cr_acl != NULL)
571 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
574 fh_unlock(&cstate->current_fh);
575 set_change_info(&create->cr_cinfo, &cstate->current_fh);
576 fh_dup2(&cstate->current_fh, &resfh);
583 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
584 struct nfsd4_getattr *getattr)
588 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
592 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
595 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
596 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
597 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
599 getattr->ga_fhp = &cstate->current_fh;
604 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
605 struct nfsd4_link *link)
607 __be32 status = nfserr_nofilehandle;
609 if (!cstate->save_fh.fh_dentry)
611 status = nfsd_link(rqstp, &cstate->current_fh,
612 link->li_name, link->li_namelen, &cstate->save_fh);
614 set_change_info(&link->li_cinfo, &cstate->current_fh);
619 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
622 struct svc_fh tmp_fh;
625 fh_init(&tmp_fh, NFS4_FHSIZE);
626 ret = exp_pseudoroot(rqstp, &tmp_fh);
629 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
634 return nfsd_lookup(rqstp, &cstate->current_fh,
635 "..", 2, &cstate->current_fh);
639 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
640 struct nfsd4_lookup *lookup)
642 return nfsd_lookup(rqstp, &cstate->current_fh,
643 lookup->lo_name, lookup->lo_len,
644 &cstate->current_fh);
648 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
649 struct nfsd4_read *read)
653 /* no need to check permission - this will be done in nfsd_read() */
655 read->rd_filp = NULL;
656 if (read->rd_offset >= OFFSET_MAX)
661 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
662 RD_STATE, &read->rd_filp))) {
663 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
667 get_file(read->rd_filp);
671 read->rd_rqstp = rqstp;
672 read->rd_fhp = &cstate->current_fh;
677 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
678 struct nfsd4_readdir *readdir)
680 u64 cookie = readdir->rd_cookie;
681 static const nfs4_verifier zeroverf;
683 /* no need to check permission - this will be done in nfsd_readdir() */
685 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
688 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
689 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
690 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
692 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
693 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
694 return nfserr_bad_cookie;
696 readdir->rd_rqstp = rqstp;
697 readdir->rd_fhp = &cstate->current_fh;
702 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
703 struct nfsd4_readlink *readlink)
705 readlink->rl_rqstp = rqstp;
706 readlink->rl_fhp = &cstate->current_fh;
711 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
712 struct nfsd4_remove *remove)
716 if (locks_in_grace())
718 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
719 remove->rm_name, remove->rm_namelen);
720 if (status == nfserr_symlink)
721 return nfserr_notdir;
723 fh_unlock(&cstate->current_fh);
724 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
730 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
731 struct nfsd4_rename *rename)
733 __be32 status = nfserr_nofilehandle;
735 if (!cstate->save_fh.fh_dentry)
737 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
738 & NFSEXP_NOSUBTREECHECK))
740 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
741 rename->rn_snamelen, &cstate->current_fh,
742 rename->rn_tname, rename->rn_tnamelen);
744 /* the underlying filesystem returns different error's than required
745 * by NFSv4. both save_fh and current_fh have been verified.. */
746 if (status == nfserr_isdir)
747 status = nfserr_exist;
748 else if ((status == nfserr_notdir) &&
749 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
750 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
751 status = nfserr_exist;
752 else if (status == nfserr_symlink)
753 status = nfserr_notdir;
756 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
757 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
763 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
764 struct nfsd4_secinfo *secinfo)
767 struct svc_export *exp;
768 struct dentry *dentry;
771 fh_init(&resfh, NFS4_FHSIZE);
772 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
773 secinfo->si_name, secinfo->si_namelen,
777 if (dentry->d_inode == NULL) {
781 secinfo->si_exp = exp;
787 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
788 struct nfsd4_setattr *setattr)
790 __be32 status = nfs_ok;
792 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
794 status = nfs4_preprocess_stateid_op(cstate,
795 &setattr->sa_stateid, WR_STATE, NULL);
798 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
802 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
807 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
812 if (setattr->sa_acl != NULL)
813 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
817 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
820 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
825 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_write *write)
828 stateid_t *stateid = &write->wr_stateid;
829 struct file *filp = NULL;
831 __be32 status = nfs_ok;
834 /* no need to check permission - this will be done in nfsd_write() */
836 if (write->wr_offset >= OFFSET_MAX)
840 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
846 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
850 cnt = write->wr_buflen;
851 write->wr_how_written = write->wr_stable_how;
852 p = (u32 *)write->wr_verifier.data;
853 *p++ = nfssvc_boot.tv_sec;
854 *p++ = nfssvc_boot.tv_usec;
856 status = nfsd_write(rqstp, &cstate->current_fh, filp,
857 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
858 &cnt, &write->wr_how_written);
862 write->wr_bytes_written = cnt;
864 if (status == nfserr_symlink)
865 status = nfserr_inval;
869 /* This routine never returns NFS_OK! If there are no other errors, it
870 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
871 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
872 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
875 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
876 struct nfsd4_verify *verify)
882 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
886 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
890 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
891 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
893 if (verify->ve_attrlen & 3)
897 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
899 count = 4 + (verify->ve_attrlen >> 2);
900 buf = kmalloc(count << 2, GFP_KERNEL);
902 return nfserr_resource;
904 status = nfsd4_encode_fattr(&cstate->current_fh,
905 cstate->current_fh.fh_export,
906 cstate->current_fh.fh_dentry, buf,
907 &count, verify->ve_bmval,
910 /* this means that nfsd4_encode_fattr() ran out of space */
911 if (status == nfserr_resource && count == 0)
912 status = nfserr_not_same;
917 p = buf + 1 + ntohl(buf[0]);
918 status = nfserr_not_same;
919 if (ntohl(*p++) != verify->ve_attrlen)
921 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
922 status = nfserr_same;
930 nfsd4_nverify(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_not_same ? nfs_ok : status;
940 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
941 struct nfsd4_verify *verify)
945 status = _nfsd4_verify(rqstp, cstate, verify);
946 return status == nfserr_same ? nfs_ok : status;
953 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
958 static inline void nfsd4_increment_op_stats(u32 opnum)
960 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
961 nfsdstats.nfs4_opcount[opnum]++;
964 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
966 enum nfsd4_op_flags {
967 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
968 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */
969 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */
972 struct nfsd4_operation {
973 nfsd4op_func op_func;
978 static struct nfsd4_operation nfsd4_ops[];
980 static const char *nfsd4_op_name(unsigned opnum);
983 * Enforce NFSv4.1 COMPOUND ordering rules.
986 * - enforce NFS4ERR_NOT_ONLY_OP,
987 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
989 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
991 if (args->minorversion && args->opcnt > 0) {
992 struct nfsd4_op *op = &args->ops[0];
993 return (op->status == nfserr_op_illegal) ||
994 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
1003 nfsd4_proc_compound(struct svc_rqst *rqstp,
1004 struct nfsd4_compoundargs *args,
1005 struct nfsd4_compoundres *resp)
1007 struct nfsd4_op *op;
1008 struct nfsd4_operation *opdesc;
1009 struct nfsd4_compound_state *cstate = &resp->cstate;
1013 resp->xbuf = &rqstp->rq_res;
1014 resp->p = rqstp->rq_res.head[0].iov_base +
1015 rqstp->rq_res.head[0].iov_len;
1016 resp->tagp = resp->p;
1017 /* reserve space for: taglen, tag, and opcnt */
1018 resp->p += 2 + XDR_QUADLEN(args->taglen);
1019 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1020 resp->taglen = args->taglen;
1021 resp->tag = args->tag;
1023 resp->rqstp = rqstp;
1024 resp->cstate.minorversion = args->minorversion;
1025 resp->cstate.replay_owner = NULL;
1026 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1027 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1028 /* Use the deferral mechanism only for NFSv4.0 compounds */
1029 rqstp->rq_usedeferral = (args->minorversion == 0);
1032 * According to RFC3010, this takes precedence over all other errors.
1034 status = nfserr_minor_vers_mismatch;
1035 if (args->minorversion > nfsd_supported_minorversion)
1038 if (!nfs41_op_ordering_ok(args)) {
1040 op->status = nfserr_sequence_pos;
1045 while (!status && resp->opcnt < args->opcnt) {
1046 op = &args->ops[resp->opcnt++];
1048 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1049 resp->opcnt, args->opcnt, op->opnum,
1050 nfsd4_op_name(op->opnum));
1052 * The XDR decode routines may have pre-set op->status;
1053 * for example, if there is a miscellaneous XDR error
1054 * it will be set to nfserr_bad_xdr.
1059 /* We must be able to encode a successful response to
1060 * this operation, with enough room left over to encode a
1061 * failed response to the next operation. If we don't
1062 * have enough room, fail with ERR_RESOURCE.
1064 slack_bytes = (char *)resp->end - (char *)resp->p;
1065 if (slack_bytes < COMPOUND_SLACK_SPACE
1066 + COMPOUND_ERR_SLACK_SPACE) {
1067 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1068 op->status = nfserr_resource;
1072 opdesc = &nfsd4_ops[op->opnum];
1074 if (!cstate->current_fh.fh_dentry) {
1075 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1076 op->status = nfserr_nofilehandle;
1079 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1080 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1081 op->status = nfserr_moved;
1085 if (opdesc->op_func)
1086 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1088 BUG_ON(op->status == nfs_ok);
1091 /* Only from SEQUENCE */
1092 if (resp->cstate.status == nfserr_replay_cache) {
1093 dprintk("%s NFS4.1 replay from cache\n", __func__);
1094 status = op->status;
1097 if (op->status == nfserr_replay_me) {
1098 op->replay = &cstate->replay_owner->so_replay;
1099 nfsd4_encode_replay(resp, op);
1100 status = op->status = op->replay->rp_status;
1102 nfsd4_encode_operation(resp, op);
1103 status = op->status;
1106 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1107 args->ops, args->opcnt, resp->opcnt, op->opnum,
1108 be32_to_cpu(status));
1110 if (cstate->replay_owner) {
1111 nfs4_put_stateowner(cstate->replay_owner);
1112 cstate->replay_owner = NULL;
1114 /* XXX Ugh, we need to get rid of this kind of special case: */
1115 if (op->opnum == OP_READ && op->u.read.rd_filp)
1116 fput(op->u.read.rd_filp);
1118 nfsd4_increment_op_stats(op->opnum);
1120 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1121 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1122 status = nfserr_jukebox;
1125 resp->cstate.status = status;
1126 fh_put(&resp->cstate.current_fh);
1127 fh_put(&resp->cstate.save_fh);
1128 BUG_ON(resp->cstate.replay_owner);
1130 nfsd4_release_compoundargs(args);
1131 /* Reset deferral mechanism for RPC deferrals */
1132 rqstp->rq_usedeferral = 1;
1133 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1137 static struct nfsd4_operation nfsd4_ops[] = {
1139 .op_func = (nfsd4op_func)nfsd4_access,
1140 .op_name = "OP_ACCESS",
1143 .op_func = (nfsd4op_func)nfsd4_close,
1144 .op_name = "OP_CLOSE",
1147 .op_func = (nfsd4op_func)nfsd4_commit,
1148 .op_name = "OP_COMMIT",
1151 .op_func = (nfsd4op_func)nfsd4_create,
1152 .op_name = "OP_CREATE",
1154 [OP_DELEGRETURN] = {
1155 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1156 .op_name = "OP_DELEGRETURN",
1159 .op_func = (nfsd4op_func)nfsd4_getattr,
1160 .op_flags = ALLOWED_ON_ABSENT_FS,
1161 .op_name = "OP_GETATTR",
1164 .op_func = (nfsd4op_func)nfsd4_getfh,
1165 .op_name = "OP_GETFH",
1168 .op_func = (nfsd4op_func)nfsd4_link,
1169 .op_name = "OP_LINK",
1172 .op_func = (nfsd4op_func)nfsd4_lock,
1173 .op_name = "OP_LOCK",
1176 .op_func = (nfsd4op_func)nfsd4_lockt,
1177 .op_name = "OP_LOCKT",
1180 .op_func = (nfsd4op_func)nfsd4_locku,
1181 .op_name = "OP_LOCKU",
1184 .op_func = (nfsd4op_func)nfsd4_lookup,
1185 .op_name = "OP_LOOKUP",
1188 .op_func = (nfsd4op_func)nfsd4_lookupp,
1189 .op_name = "OP_LOOKUPP",
1192 .op_func = (nfsd4op_func)nfsd4_nverify,
1193 .op_name = "OP_NVERIFY",
1196 .op_func = (nfsd4op_func)nfsd4_open,
1197 .op_name = "OP_OPEN",
1199 [OP_OPEN_CONFIRM] = {
1200 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1201 .op_name = "OP_OPEN_CONFIRM",
1203 [OP_OPEN_DOWNGRADE] = {
1204 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1205 .op_name = "OP_OPEN_DOWNGRADE",
1208 .op_func = (nfsd4op_func)nfsd4_putfh,
1209 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1210 .op_name = "OP_PUTFH",
1213 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1214 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1215 .op_name = "OP_PUTPUBFH",
1218 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1219 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1220 .op_name = "OP_PUTROOTFH",
1223 .op_func = (nfsd4op_func)nfsd4_read,
1224 .op_name = "OP_READ",
1227 .op_func = (nfsd4op_func)nfsd4_readdir,
1228 .op_name = "OP_READDIR",
1231 .op_func = (nfsd4op_func)nfsd4_readlink,
1232 .op_name = "OP_READLINK",
1235 .op_func = (nfsd4op_func)nfsd4_remove,
1236 .op_name = "OP_REMOVE",
1239 .op_name = "OP_RENAME",
1240 .op_func = (nfsd4op_func)nfsd4_rename,
1243 .op_func = (nfsd4op_func)nfsd4_renew,
1244 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1245 .op_name = "OP_RENEW",
1248 .op_func = (nfsd4op_func)nfsd4_restorefh,
1249 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1250 .op_name = "OP_RESTOREFH",
1253 .op_func = (nfsd4op_func)nfsd4_savefh,
1254 .op_name = "OP_SAVEFH",
1257 .op_func = (nfsd4op_func)nfsd4_secinfo,
1258 .op_name = "OP_SECINFO",
1261 .op_func = (nfsd4op_func)nfsd4_setattr,
1262 .op_name = "OP_SETATTR",
1264 [OP_SETCLIENTID] = {
1265 .op_func = (nfsd4op_func)nfsd4_setclientid,
1266 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1267 .op_name = "OP_SETCLIENTID",
1269 [OP_SETCLIENTID_CONFIRM] = {
1270 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1271 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1272 .op_name = "OP_SETCLIENTID_CONFIRM",
1275 .op_func = (nfsd4op_func)nfsd4_verify,
1276 .op_name = "OP_VERIFY",
1279 .op_func = (nfsd4op_func)nfsd4_write,
1280 .op_name = "OP_WRITE",
1282 [OP_RELEASE_LOCKOWNER] = {
1283 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1284 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1285 .op_name = "OP_RELEASE_LOCKOWNER",
1288 /* NFSv4.1 operations */
1289 [OP_EXCHANGE_ID] = {
1290 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1291 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1292 .op_name = "OP_EXCHANGE_ID",
1294 [OP_CREATE_SESSION] = {
1295 .op_func = (nfsd4op_func)nfsd4_create_session,
1296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1297 .op_name = "OP_CREATE_SESSION",
1299 [OP_DESTROY_SESSION] = {
1300 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1301 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1302 .op_name = "OP_DESTROY_SESSION",
1305 .op_func = (nfsd4op_func)nfsd4_sequence,
1306 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1307 .op_name = "OP_SEQUENCE",
1311 static const char *nfsd4_op_name(unsigned opnum)
1313 if (opnum < ARRAY_SIZE(nfsd4_ops))
1314 return nfsd4_ops[opnum].op_name;
1315 return "unknown_operation";
1318 #define nfsd4_voidres nfsd4_voidargs
1319 struct nfsd4_voidargs { int dummy; };
1322 * TODO: At the present time, the NFSv4 server does not do XID caching
1323 * of requests. Implementing XID caching would not be a serious problem,
1324 * although it would require a mild change in interfaces since one
1325 * doesn't know whether an NFSv4 request is idempotent until after the
1326 * XDR decode. However, XID caching totally confuses pynfs (Peter
1327 * Astrand's regression testsuite for NFSv4 servers), which reuses
1328 * XID's liberally, so I've left it unimplemented until pynfs generates
1331 static struct svc_procedure nfsd_procedures4[2] = {
1333 .pc_func = (svc_procfunc) nfsd4_proc_null,
1334 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1335 .pc_argsize = sizeof(struct nfsd4_voidargs),
1336 .pc_ressize = sizeof(struct nfsd4_voidres),
1337 .pc_cachetype = RC_NOCACHE,
1340 [NFSPROC4_COMPOUND] = {
1341 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1342 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1343 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1344 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1345 .pc_ressize = sizeof(struct nfsd4_compoundres),
1346 .pc_cachetype = RC_NOCACHE,
1347 .pc_xdrressize = NFSD_BUFSIZE/4,
1351 struct svc_version nfsd_version4 = {
1354 .vs_proc = nfsd_procedures4,
1355 .vs_dispatch = nfsd_dispatch,
1356 .vs_xdrsize = NFS4_SVC_XDRSIZE,