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>
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 static u32 nfsd_attrmask[] = {
55 NFSD_WRITEABLE_ATTRS_WORD0,
56 NFSD_WRITEABLE_ATTRS_WORD1,
57 NFSD_WRITEABLE_ATTRS_WORD2
60 static u32 nfsd41_ex_attrmask[] = {
61 NFSD_SUPPATTR_EXCLCREAT_WORD0,
62 NFSD_SUPPATTR_EXCLCREAT_WORD1,
63 NFSD_SUPPATTR_EXCLCREAT_WORD2
67 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
68 u32 *bmval, u32 *writable)
70 struct dentry *dentry = cstate->current_fh.fh_dentry;
71 struct svc_export *exp = cstate->current_fh.fh_export;
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 & FATTR4_WORD0_FS_LOCATIONS 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;
90 if (bmval[0] & FATTR4_WORD0_FS_LOCATIONS) {
91 if (exp->ex_fslocs.locations == NULL)
92 return nfserr_attrnotsupp;
96 * According to spec, read-only attributes return ERR_INVAL.
99 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
100 (bmval[2] & ~writable[2]))
108 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
109 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
111 __be32 status = nfs_ok;
113 if (open->op_create == NFS4_OPEN_CREATE) {
114 if (open->op_createmode == NFS4_CREATE_UNCHECKED
115 || open->op_createmode == NFS4_CREATE_GUARDED)
116 status = check_attr_support(rqstp, cstate,
117 open->op_bmval, nfsd_attrmask);
118 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
119 status = check_attr_support(rqstp, cstate,
120 open->op_bmval, nfsd41_ex_attrmask);
127 is_create_with_attrs(struct nfsd4_open *open)
129 return open->op_create == NFS4_OPEN_CREATE
130 && (open->op_createmode == NFS4_CREATE_UNCHECKED
131 || open->op_createmode == NFS4_CREATE_GUARDED
132 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
136 * if error occurs when setting the acl, just clear the acl bit
137 * in the returned attr bitmap.
140 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
141 struct nfs4_acl *acl, u32 *bmval)
145 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
148 * We should probably fail the whole open at this point,
149 * but we've already created the file, so it's too late;
150 * So this seems the least of evils:
152 bmval[0] &= ~FATTR4_WORD0_ACL;
156 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
159 dget(src->fh_dentry);
161 cache_get(&src->fh_export->h);
166 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
170 if (open->op_truncate &&
171 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
174 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
175 accmode |= NFSD_MAY_READ;
176 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
177 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
178 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
179 accmode |= NFSD_MAY_WRITE;
181 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
187 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
193 fh_init(&resfh, NFS4_FHSIZE);
194 open->op_truncate = 0;
196 if (open->op_create) {
197 /* FIXME: check session persistence and pnfs flags.
198 * The nfsv4.1 spec requires the following semantics:
200 * Persistent | pNFS | Server REQUIRED | Client Allowed
201 * Reply Cache | server | |
202 * -------------+--------+-----------------+--------------------
203 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
205 * | | and EXCLUSIVE4 | or EXCLUSIVE4
207 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
208 * yes | no | GUARDED4 | GUARDED4
209 * yes | yes | GUARDED4 | GUARDED4
213 * Note: create modes (UNCHECKED,GUARDED...) are the same
216 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
217 open->op_fname.len, &open->op_iattr,
218 &resfh, open->op_createmode,
219 (u32 *)open->op_verf.data,
220 &open->op_truncate, &created);
223 * Following rfc 3530 14.2.16, use the returned bitmask
224 * to indicate which attributes we used to store the
227 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
228 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
229 FATTR4_WORD1_TIME_MODIFY);
231 status = nfsd_lookup(rqstp, current_fh,
232 open->op_fname.data, open->op_fname.len, &resfh);
233 fh_unlock(current_fh);
238 if (is_create_with_attrs(open) && open->op_acl != NULL)
239 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
241 set_change_info(&open->op_cinfo, current_fh);
242 fh_dup2(current_fh, &resfh);
244 /* set reply cache */
245 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
248 status = do_open_permission(rqstp, current_fh, open,
257 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
261 /* Only reclaims from previously confirmed clients are valid */
262 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
265 /* We don't know the target directory, and therefore can not
266 * set the change info
269 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
271 /* set replay cache */
272 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
273 ¤t_fh->fh_handle);
275 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
276 (open->op_iattr.ia_size == 0);
278 status = do_open_permission(rqstp, current_fh, open,
279 NFSD_MAY_OWNER_OVERRIDE);
285 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
287 struct nfsd4_sessionid *sid =
288 (struct nfsd4_sessionid *)session->se_sessionid.data;
290 clid->cl_boot = sid->clientid.cl_boot;
291 clid->cl_id = sid->clientid.cl_id;
295 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
296 struct nfsd4_open *open)
299 struct nfsd4_compoundres *resp;
301 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
302 (int)open->op_fname.len, open->op_fname.data,
303 open->op_stateowner);
305 /* This check required by spec. */
306 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
309 if (nfsd4_has_session(cstate))
310 copy_clientid(&open->op_clientid, cstate->session);
314 /* check seqid for replay. set nfs4_owner */
315 resp = rqstp->rq_resp;
316 status = nfsd4_process_open1(&resp->cstate, open);
317 if (status == nfserr_replay_me) {
318 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
319 fh_put(&cstate->current_fh);
320 fh_copy_shallow(&cstate->current_fh.fh_handle,
322 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
324 dprintk("nfsd4_open: replay failed"
325 " restoring previous filehandle\n");
327 status = nfserr_replay_me;
332 status = nfsd4_check_open_attributes(rqstp, cstate, open);
336 /* Openowner is now set, so sequence id will get bumped. Now we need
337 * these checks before we do any creates: */
338 status = nfserr_grace;
339 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
341 status = nfserr_no_grace;
342 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
345 switch (open->op_claim_type) {
346 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
347 case NFS4_OPEN_CLAIM_NULL:
349 * (1) set CURRENT_FH to the file being opened,
350 * creating it if necessary, (2) set open->op_cinfo,
351 * (3) set open->op_truncate if the file is to be
352 * truncated after opening, (4) do permission checking.
354 status = do_open_lookup(rqstp, &cstate->current_fh,
359 case NFS4_OPEN_CLAIM_PREVIOUS:
360 open->op_stateowner->so_confirmed = 1;
362 * The CURRENT_FH is already set to the file being
363 * opened. (1) set open->op_cinfo, (2) set
364 * open->op_truncate if the file is to be truncated
365 * after opening, (3) do permission checking.
367 status = do_open_fhandle(rqstp, &cstate->current_fh,
372 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
373 open->op_stateowner->so_confirmed = 1;
374 dprintk("NFSD: unsupported OPEN claim type %d\n",
375 open->op_claim_type);
376 status = nfserr_notsupp;
379 dprintk("NFSD: Invalid OPEN claim type %d\n",
380 open->op_claim_type);
381 status = nfserr_inval;
385 * nfsd4_process_open2() does the actual opening of the file. If
386 * successful, it (1) truncates the file if open->op_truncate was
387 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
389 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
391 if (open->op_stateowner) {
392 nfs4_get_stateowner(open->op_stateowner);
393 cstate->replay_owner = open->op_stateowner;
400 * filehandle-manipulating ops.
403 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
404 struct svc_fh **getfh)
406 if (!cstate->current_fh.fh_dentry)
407 return nfserr_nofilehandle;
409 *getfh = &cstate->current_fh;
414 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
415 struct nfsd4_putfh *putfh)
417 fh_put(&cstate->current_fh);
418 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
419 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
421 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
425 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
430 fh_put(&cstate->current_fh);
431 status = exp_pseudoroot(rqstp, &cstate->current_fh);
436 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
439 if (!cstate->save_fh.fh_dentry)
440 return nfserr_restorefh;
442 fh_dup2(&cstate->current_fh, &cstate->save_fh);
447 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
450 if (!cstate->current_fh.fh_dentry)
451 return nfserr_nofilehandle;
453 fh_dup2(&cstate->save_fh, &cstate->current_fh);
461 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
462 struct nfsd4_access *access)
464 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
467 access->ac_resp_access = access->ac_req_access;
468 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
469 &access->ac_supported);
473 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
474 struct nfsd4_commit *commit)
478 u32 *p = (u32 *)commit->co_verf.data;
479 *p++ = nfssvc_boot.tv_sec;
480 *p++ = nfssvc_boot.tv_usec;
482 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
484 if (status == nfserr_symlink)
485 status = nfserr_inval;
490 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
491 struct nfsd4_create *create)
497 fh_init(&resfh, NFS4_FHSIZE);
499 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
501 if (status == nfserr_symlink)
502 status = nfserr_notdir;
506 status = check_attr_support(rqstp, cstate, create->cr_bmval,
511 switch (create->cr_type) {
513 /* ugh! we have to null-terminate the linktext, or
514 * vfs_symlink() will choke. it is always safe to
515 * null-terminate by brute force, since at worst we
516 * will overwrite the first byte of the create namelen
517 * in the XDR buffer, which has already been extracted
520 create->cr_linkname[create->cr_linklen] = 0;
522 status = nfsd_symlink(rqstp, &cstate->current_fh,
523 create->cr_name, create->cr_namelen,
524 create->cr_linkname, create->cr_linklen,
525 &resfh, &create->cr_iattr);
529 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
530 if (MAJOR(rdev) != create->cr_specdata1 ||
531 MINOR(rdev) != create->cr_specdata2)
533 status = nfsd_create(rqstp, &cstate->current_fh,
534 create->cr_name, create->cr_namelen,
535 &create->cr_iattr, S_IFBLK, rdev, &resfh);
539 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
540 if (MAJOR(rdev) != create->cr_specdata1 ||
541 MINOR(rdev) != create->cr_specdata2)
543 status = nfsd_create(rqstp, &cstate->current_fh,
544 create->cr_name, create->cr_namelen,
545 &create->cr_iattr,S_IFCHR, rdev, &resfh);
549 status = nfsd_create(rqstp, &cstate->current_fh,
550 create->cr_name, create->cr_namelen,
551 &create->cr_iattr, S_IFSOCK, 0, &resfh);
555 status = nfsd_create(rqstp, &cstate->current_fh,
556 create->cr_name, create->cr_namelen,
557 &create->cr_iattr, S_IFIFO, 0, &resfh);
561 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
562 status = nfsd_create(rqstp, &cstate->current_fh,
563 create->cr_name, create->cr_namelen,
564 &create->cr_iattr, S_IFDIR, 0, &resfh);
568 status = nfserr_badtype;
574 if (create->cr_acl != NULL)
575 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
578 fh_unlock(&cstate->current_fh);
579 set_change_info(&create->cr_cinfo, &cstate->current_fh);
580 fh_dup2(&cstate->current_fh, &resfh);
587 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
588 struct nfsd4_getattr *getattr)
592 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
596 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
599 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
600 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
601 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
603 getattr->ga_fhp = &cstate->current_fh;
608 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
609 struct nfsd4_link *link)
611 __be32 status = nfserr_nofilehandle;
613 if (!cstate->save_fh.fh_dentry)
615 status = nfsd_link(rqstp, &cstate->current_fh,
616 link->li_name, link->li_namelen, &cstate->save_fh);
618 set_change_info(&link->li_cinfo, &cstate->current_fh);
623 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
626 struct svc_fh tmp_fh;
629 fh_init(&tmp_fh, NFS4_FHSIZE);
630 ret = exp_pseudoroot(rqstp, &tmp_fh);
633 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
638 return nfsd_lookup(rqstp, &cstate->current_fh,
639 "..", 2, &cstate->current_fh);
643 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
644 struct nfsd4_lookup *lookup)
646 return nfsd_lookup(rqstp, &cstate->current_fh,
647 lookup->lo_name, lookup->lo_len,
648 &cstate->current_fh);
652 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
653 struct nfsd4_read *read)
657 /* no need to check permission - this will be done in nfsd_read() */
659 read->rd_filp = NULL;
660 if (read->rd_offset >= OFFSET_MAX)
665 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
666 RD_STATE, &read->rd_filp))) {
667 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
671 get_file(read->rd_filp);
675 read->rd_rqstp = rqstp;
676 read->rd_fhp = &cstate->current_fh;
681 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
682 struct nfsd4_readdir *readdir)
684 u64 cookie = readdir->rd_cookie;
685 static const nfs4_verifier zeroverf;
687 /* no need to check permission - this will be done in nfsd_readdir() */
689 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
692 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
693 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
694 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
696 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
697 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
698 return nfserr_bad_cookie;
700 readdir->rd_rqstp = rqstp;
701 readdir->rd_fhp = &cstate->current_fh;
706 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
707 struct nfsd4_readlink *readlink)
709 readlink->rl_rqstp = rqstp;
710 readlink->rl_fhp = &cstate->current_fh;
715 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
716 struct nfsd4_remove *remove)
720 if (locks_in_grace())
722 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
723 remove->rm_name, remove->rm_namelen);
724 if (status == nfserr_symlink)
725 return nfserr_notdir;
727 fh_unlock(&cstate->current_fh);
728 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
734 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
735 struct nfsd4_rename *rename)
737 __be32 status = nfserr_nofilehandle;
739 if (!cstate->save_fh.fh_dentry)
741 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
742 & NFSEXP_NOSUBTREECHECK))
744 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
745 rename->rn_snamelen, &cstate->current_fh,
746 rename->rn_tname, rename->rn_tnamelen);
748 /* the underlying filesystem returns different error's than required
749 * by NFSv4. both save_fh and current_fh have been verified.. */
750 if (status == nfserr_isdir)
751 status = nfserr_exist;
752 else if ((status == nfserr_notdir) &&
753 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
754 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
755 status = nfserr_exist;
756 else if (status == nfserr_symlink)
757 status = nfserr_notdir;
760 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
761 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
767 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
768 struct nfsd4_secinfo *secinfo)
771 struct svc_export *exp;
772 struct dentry *dentry;
775 fh_init(&resfh, NFS4_FHSIZE);
776 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
777 secinfo->si_name, secinfo->si_namelen,
781 if (dentry->d_inode == NULL) {
785 secinfo->si_exp = exp;
791 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
792 struct nfsd4_setattr *setattr)
794 __be32 status = nfs_ok;
796 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
798 status = nfs4_preprocess_stateid_op(cstate,
799 &setattr->sa_stateid, WR_STATE, NULL);
802 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
806 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
811 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
816 if (setattr->sa_acl != NULL)
817 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
821 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
824 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
829 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
830 struct nfsd4_write *write)
832 stateid_t *stateid = &write->wr_stateid;
833 struct file *filp = NULL;
835 __be32 status = nfs_ok;
838 /* no need to check permission - this will be done in nfsd_write() */
840 if (write->wr_offset >= OFFSET_MAX)
844 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
850 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
854 cnt = write->wr_buflen;
855 write->wr_how_written = write->wr_stable_how;
856 p = (u32 *)write->wr_verifier.data;
857 *p++ = nfssvc_boot.tv_sec;
858 *p++ = nfssvc_boot.tv_usec;
860 status = nfsd_write(rqstp, &cstate->current_fh, filp,
861 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
862 &cnt, &write->wr_how_written);
866 write->wr_bytes_written = cnt;
868 if (status == nfserr_symlink)
869 status = nfserr_inval;
873 /* This routine never returns NFS_OK! If there are no other errors, it
874 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
875 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
876 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
879 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
880 struct nfsd4_verify *verify)
886 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
890 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
894 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
895 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
897 if (verify->ve_attrlen & 3)
901 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
903 count = 4 + (verify->ve_attrlen >> 2);
904 buf = kmalloc(count << 2, GFP_KERNEL);
906 return nfserr_resource;
908 status = nfsd4_encode_fattr(&cstate->current_fh,
909 cstate->current_fh.fh_export,
910 cstate->current_fh.fh_dentry, buf,
911 &count, verify->ve_bmval,
914 /* this means that nfsd4_encode_fattr() ran out of space */
915 if (status == nfserr_resource && count == 0)
916 status = nfserr_not_same;
921 p = buf + 1 + ntohl(buf[0]);
922 status = nfserr_not_same;
923 if (ntohl(*p++) != verify->ve_attrlen)
925 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
926 status = nfserr_same;
934 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
935 struct nfsd4_verify *verify)
939 status = _nfsd4_verify(rqstp, cstate, verify);
940 return status == nfserr_not_same ? nfs_ok : status;
944 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
945 struct nfsd4_verify *verify)
949 status = _nfsd4_verify(rqstp, cstate, verify);
950 return status == nfserr_same ? nfs_ok : status;
957 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
962 static inline void nfsd4_increment_op_stats(u32 opnum)
964 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
965 nfsdstats.nfs4_opcount[opnum]++;
968 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
970 enum nfsd4_op_flags {
971 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
972 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */
973 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */
976 struct nfsd4_operation {
977 nfsd4op_func op_func;
982 static struct nfsd4_operation nfsd4_ops[];
984 static const char *nfsd4_op_name(unsigned opnum);
987 * Enforce NFSv4.1 COMPOUND ordering rules.
990 * - enforce NFS4ERR_NOT_ONLY_OP,
991 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
993 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
995 if (args->minorversion && args->opcnt > 0) {
996 struct nfsd4_op *op = &args->ops[0];
997 return (op->status == nfserr_op_illegal) ||
998 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
1007 nfsd4_proc_compound(struct svc_rqst *rqstp,
1008 struct nfsd4_compoundargs *args,
1009 struct nfsd4_compoundres *resp)
1011 struct nfsd4_op *op;
1012 struct nfsd4_operation *opdesc;
1013 struct nfsd4_compound_state *cstate = &resp->cstate;
1017 resp->xbuf = &rqstp->rq_res;
1018 resp->p = rqstp->rq_res.head[0].iov_base +
1019 rqstp->rq_res.head[0].iov_len;
1020 resp->tagp = resp->p;
1021 /* reserve space for: taglen, tag, and opcnt */
1022 resp->p += 2 + XDR_QUADLEN(args->taglen);
1023 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1024 resp->taglen = args->taglen;
1025 resp->tag = args->tag;
1027 resp->rqstp = rqstp;
1028 resp->cstate.minorversion = args->minorversion;
1029 resp->cstate.replay_owner = NULL;
1030 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1031 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1032 /* Use the deferral mechanism only for NFSv4.0 compounds */
1033 rqstp->rq_usedeferral = (args->minorversion == 0);
1036 * According to RFC3010, this takes precedence over all other errors.
1038 status = nfserr_minor_vers_mismatch;
1039 if (args->minorversion > nfsd_supported_minorversion)
1042 if (!nfs41_op_ordering_ok(args)) {
1044 op->status = nfserr_sequence_pos;
1049 while (!status && resp->opcnt < args->opcnt) {
1050 op = &args->ops[resp->opcnt++];
1052 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1053 resp->opcnt, args->opcnt, op->opnum,
1054 nfsd4_op_name(op->opnum));
1056 * The XDR decode routines may have pre-set op->status;
1057 * for example, if there is a miscellaneous XDR error
1058 * it will be set to nfserr_bad_xdr.
1063 /* We must be able to encode a successful response to
1064 * this operation, with enough room left over to encode a
1065 * failed response to the next operation. If we don't
1066 * have enough room, fail with ERR_RESOURCE.
1068 slack_bytes = (char *)resp->end - (char *)resp->p;
1069 if (slack_bytes < COMPOUND_SLACK_SPACE
1070 + COMPOUND_ERR_SLACK_SPACE) {
1071 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1072 op->status = nfserr_resource;
1076 opdesc = &nfsd4_ops[op->opnum];
1078 if (!cstate->current_fh.fh_dentry) {
1079 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1080 op->status = nfserr_nofilehandle;
1083 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1084 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1085 op->status = nfserr_moved;
1089 if (opdesc->op_func)
1090 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1092 BUG_ON(op->status == nfs_ok);
1095 /* Only from SEQUENCE */
1096 if (resp->cstate.status == nfserr_replay_cache) {
1097 dprintk("%s NFS4.1 replay from cache\n", __func__);
1098 status = op->status;
1101 if (op->status == nfserr_replay_me) {
1102 op->replay = &cstate->replay_owner->so_replay;
1103 nfsd4_encode_replay(resp, op);
1104 status = op->status = op->replay->rp_status;
1106 nfsd4_encode_operation(resp, op);
1107 status = op->status;
1110 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1111 args->ops, args->opcnt, resp->opcnt, op->opnum,
1112 be32_to_cpu(status));
1114 if (cstate->replay_owner) {
1115 nfs4_put_stateowner(cstate->replay_owner);
1116 cstate->replay_owner = NULL;
1118 /* XXX Ugh, we need to get rid of this kind of special case: */
1119 if (op->opnum == OP_READ && op->u.read.rd_filp)
1120 fput(op->u.read.rd_filp);
1122 nfsd4_increment_op_stats(op->opnum);
1124 if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1125 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1126 status = nfserr_jukebox;
1129 resp->cstate.status = status;
1130 fh_put(&resp->cstate.current_fh);
1131 fh_put(&resp->cstate.save_fh);
1132 BUG_ON(resp->cstate.replay_owner);
1134 nfsd4_release_compoundargs(args);
1135 /* Reset deferral mechanism for RPC deferrals */
1136 rqstp->rq_usedeferral = 1;
1137 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1141 static struct nfsd4_operation nfsd4_ops[] = {
1143 .op_func = (nfsd4op_func)nfsd4_access,
1144 .op_name = "OP_ACCESS",
1147 .op_func = (nfsd4op_func)nfsd4_close,
1148 .op_name = "OP_CLOSE",
1151 .op_func = (nfsd4op_func)nfsd4_commit,
1152 .op_name = "OP_COMMIT",
1155 .op_func = (nfsd4op_func)nfsd4_create,
1156 .op_name = "OP_CREATE",
1158 [OP_DELEGRETURN] = {
1159 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1160 .op_name = "OP_DELEGRETURN",
1163 .op_func = (nfsd4op_func)nfsd4_getattr,
1164 .op_flags = ALLOWED_ON_ABSENT_FS,
1165 .op_name = "OP_GETATTR",
1168 .op_func = (nfsd4op_func)nfsd4_getfh,
1169 .op_name = "OP_GETFH",
1172 .op_func = (nfsd4op_func)nfsd4_link,
1173 .op_name = "OP_LINK",
1176 .op_func = (nfsd4op_func)nfsd4_lock,
1177 .op_name = "OP_LOCK",
1180 .op_func = (nfsd4op_func)nfsd4_lockt,
1181 .op_name = "OP_LOCKT",
1184 .op_func = (nfsd4op_func)nfsd4_locku,
1185 .op_name = "OP_LOCKU",
1188 .op_func = (nfsd4op_func)nfsd4_lookup,
1189 .op_name = "OP_LOOKUP",
1192 .op_func = (nfsd4op_func)nfsd4_lookupp,
1193 .op_name = "OP_LOOKUPP",
1196 .op_func = (nfsd4op_func)nfsd4_nverify,
1197 .op_name = "OP_NVERIFY",
1200 .op_func = (nfsd4op_func)nfsd4_open,
1201 .op_name = "OP_OPEN",
1203 [OP_OPEN_CONFIRM] = {
1204 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1205 .op_name = "OP_OPEN_CONFIRM",
1207 [OP_OPEN_DOWNGRADE] = {
1208 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1209 .op_name = "OP_OPEN_DOWNGRADE",
1212 .op_func = (nfsd4op_func)nfsd4_putfh,
1213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1214 .op_name = "OP_PUTFH",
1217 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1219 .op_name = "OP_PUTPUBFH",
1222 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1223 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1224 .op_name = "OP_PUTROOTFH",
1227 .op_func = (nfsd4op_func)nfsd4_read,
1228 .op_name = "OP_READ",
1231 .op_func = (nfsd4op_func)nfsd4_readdir,
1232 .op_name = "OP_READDIR",
1235 .op_func = (nfsd4op_func)nfsd4_readlink,
1236 .op_name = "OP_READLINK",
1239 .op_func = (nfsd4op_func)nfsd4_remove,
1240 .op_name = "OP_REMOVE",
1243 .op_name = "OP_RENAME",
1244 .op_func = (nfsd4op_func)nfsd4_rename,
1247 .op_func = (nfsd4op_func)nfsd4_renew,
1248 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1249 .op_name = "OP_RENEW",
1252 .op_func = (nfsd4op_func)nfsd4_restorefh,
1253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1254 .op_name = "OP_RESTOREFH",
1257 .op_func = (nfsd4op_func)nfsd4_savefh,
1258 .op_name = "OP_SAVEFH",
1261 .op_func = (nfsd4op_func)nfsd4_secinfo,
1262 .op_name = "OP_SECINFO",
1265 .op_func = (nfsd4op_func)nfsd4_setattr,
1266 .op_name = "OP_SETATTR",
1268 [OP_SETCLIENTID] = {
1269 .op_func = (nfsd4op_func)nfsd4_setclientid,
1270 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1271 .op_name = "OP_SETCLIENTID",
1273 [OP_SETCLIENTID_CONFIRM] = {
1274 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1275 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1276 .op_name = "OP_SETCLIENTID_CONFIRM",
1279 .op_func = (nfsd4op_func)nfsd4_verify,
1280 .op_name = "OP_VERIFY",
1283 .op_func = (nfsd4op_func)nfsd4_write,
1284 .op_name = "OP_WRITE",
1286 [OP_RELEASE_LOCKOWNER] = {
1287 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1288 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1289 .op_name = "OP_RELEASE_LOCKOWNER",
1292 /* NFSv4.1 operations */
1293 [OP_EXCHANGE_ID] = {
1294 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1295 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1296 .op_name = "OP_EXCHANGE_ID",
1298 [OP_CREATE_SESSION] = {
1299 .op_func = (nfsd4op_func)nfsd4_create_session,
1300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1301 .op_name = "OP_CREATE_SESSION",
1303 [OP_DESTROY_SESSION] = {
1304 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1305 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1306 .op_name = "OP_DESTROY_SESSION",
1309 .op_func = (nfsd4op_func)nfsd4_sequence,
1310 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1311 .op_name = "OP_SEQUENCE",
1315 static const char *nfsd4_op_name(unsigned opnum)
1317 if (opnum < ARRAY_SIZE(nfsd4_ops))
1318 return nfsd4_ops[opnum].op_name;
1319 return "unknown_operation";
1322 #define nfsd4_voidres nfsd4_voidargs
1323 struct nfsd4_voidargs { int dummy; };
1326 * TODO: At the present time, the NFSv4 server does not do XID caching
1327 * of requests. Implementing XID caching would not be a serious problem,
1328 * although it would require a mild change in interfaces since one
1329 * doesn't know whether an NFSv4 request is idempotent until after the
1330 * XDR decode. However, XID caching totally confuses pynfs (Peter
1331 * Astrand's regression testsuite for NFSv4 servers), which reuses
1332 * XID's liberally, so I've left it unimplemented until pynfs generates
1335 static struct svc_procedure nfsd_procedures4[2] = {
1337 .pc_func = (svc_procfunc) nfsd4_proc_null,
1338 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1339 .pc_argsize = sizeof(struct nfsd4_voidargs),
1340 .pc_ressize = sizeof(struct nfsd4_voidres),
1341 .pc_cachetype = RC_NOCACHE,
1344 [NFSPROC4_COMPOUND] = {
1345 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1346 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1347 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1348 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1349 .pc_ressize = sizeof(struct nfsd4_compoundres),
1350 .pc_cachetype = RC_NOCACHE,
1351 .pc_xdrressize = NFSD_BUFSIZE/4,
1355 struct svc_version nfsd_version4 = {
1358 .vs_proc = nfsd_procedures4,
1359 .vs_dispatch = nfsd_dispatch,
1360 .vs_xdrsize = NFS4_SVC_XDRSIZE,