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
55 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
60 cache_get(&src->fh_export->h);
65 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
69 if (open->op_truncate &&
70 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
73 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
74 accmode |= NFSD_MAY_READ;
75 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
76 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
77 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
78 accmode |= NFSD_MAY_WRITE;
80 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
86 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
92 fh_init(&resfh, NFS4_FHSIZE);
93 open->op_truncate = 0;
95 if (open->op_create) {
97 * Note: create modes (UNCHECKED,GUARDED...) are the same
100 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
101 open->op_fname.len, &open->op_iattr,
102 &resfh, open->op_createmode,
103 (u32 *)open->op_verf.data,
104 &open->op_truncate, &created);
107 * Following rfc 3530 14.2.16, use the returned bitmask
108 * to indicate which attributes we used to store the
111 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
112 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
113 FATTR4_WORD1_TIME_MODIFY);
115 status = nfsd_lookup(rqstp, current_fh,
116 open->op_fname.data, open->op_fname.len, &resfh);
117 fh_unlock(current_fh);
122 set_change_info(&open->op_cinfo, current_fh);
123 fh_dup2(current_fh, &resfh);
125 /* set reply cache */
126 open->op_stateowner->so_replay.rp_openfh_len = resfh.fh_handle.fh_size;
127 memcpy(open->op_stateowner->so_replay.rp_openfh,
128 &resfh.fh_handle.fh_base, resfh.fh_handle.fh_size);
131 status = do_open_permission(rqstp, current_fh, open,
140 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
144 /* Only reclaims from previously confirmed clients are valid */
145 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
148 /* We don't know the target directory, and therefore can not
149 * set the change info
152 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
154 /* set replay cache */
155 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
156 memcpy(open->op_stateowner->so_replay.rp_openfh,
157 ¤t_fh->fh_handle.fh_base,
158 current_fh->fh_handle.fh_size);
160 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
161 (open->op_iattr.ia_size == 0);
163 status = do_open_permission(rqstp, current_fh, open,
164 NFSD_MAY_OWNER_OVERRIDE);
171 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
172 struct nfsd4_open *open)
175 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
176 (int)open->op_fname.len, open->op_fname.data,
177 open->op_stateowner);
179 /* This check required by spec. */
180 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
185 /* check seqid for replay. set nfs4_owner */
186 status = nfsd4_process_open1(open);
187 if (status == nfserr_replay_me) {
188 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
189 fh_put(&cstate->current_fh);
190 cstate->current_fh.fh_handle.fh_size = rp->rp_openfh_len;
191 memcpy(&cstate->current_fh.fh_handle.fh_base, rp->rp_openfh,
193 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
195 dprintk("nfsd4_open: replay failed"
196 " restoring previous filehandle\n");
198 status = nfserr_replay_me;
203 /* Openowner is now set, so sequence id will get bumped. Now we need
204 * these checks before we do any creates: */
205 status = nfserr_grace;
206 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
208 status = nfserr_no_grace;
209 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
212 switch (open->op_claim_type) {
213 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
214 status = nfserr_inval;
218 case NFS4_OPEN_CLAIM_NULL:
220 * (1) set CURRENT_FH to the file being opened,
221 * creating it if necessary, (2) set open->op_cinfo,
222 * (3) set open->op_truncate if the file is to be
223 * truncated after opening, (4) do permission checking.
225 status = do_open_lookup(rqstp, &cstate->current_fh,
230 case NFS4_OPEN_CLAIM_PREVIOUS:
231 open->op_stateowner->so_confirmed = 1;
233 * The CURRENT_FH is already set to the file being
234 * opened. (1) set open->op_cinfo, (2) set
235 * open->op_truncate if the file is to be truncated
236 * after opening, (3) do permission checking.
238 status = do_open_fhandle(rqstp, &cstate->current_fh,
243 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
244 open->op_stateowner->so_confirmed = 1;
245 dprintk("NFSD: unsupported OPEN claim type %d\n",
246 open->op_claim_type);
247 status = nfserr_notsupp;
250 dprintk("NFSD: Invalid OPEN claim type %d\n",
251 open->op_claim_type);
252 status = nfserr_inval;
256 * nfsd4_process_open2() does the actual opening of the file. If
257 * successful, it (1) truncates the file if open->op_truncate was
258 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
260 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
262 if (open->op_stateowner) {
263 nfs4_get_stateowner(open->op_stateowner);
264 cstate->replay_owner = open->op_stateowner;
271 * filehandle-manipulating ops.
274 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
275 struct svc_fh **getfh)
277 if (!cstate->current_fh.fh_dentry)
278 return nfserr_nofilehandle;
280 *getfh = &cstate->current_fh;
285 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
286 struct nfsd4_putfh *putfh)
288 fh_put(&cstate->current_fh);
289 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
290 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
292 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
296 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
301 fh_put(&cstate->current_fh);
302 status = exp_pseudoroot(rqstp, &cstate->current_fh);
307 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
310 if (!cstate->save_fh.fh_dentry)
311 return nfserr_restorefh;
313 fh_dup2(&cstate->current_fh, &cstate->save_fh);
318 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
321 if (!cstate->current_fh.fh_dentry)
322 return nfserr_nofilehandle;
324 fh_dup2(&cstate->save_fh, &cstate->current_fh);
332 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
333 struct nfsd4_access *access)
335 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
338 access->ac_resp_access = access->ac_req_access;
339 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
340 &access->ac_supported);
344 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
345 struct nfsd4_commit *commit)
349 u32 *p = (u32 *)commit->co_verf.data;
350 *p++ = nfssvc_boot.tv_sec;
351 *p++ = nfssvc_boot.tv_usec;
353 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
355 if (status == nfserr_symlink)
356 status = nfserr_inval;
361 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
362 struct nfsd4_create *create)
368 fh_init(&resfh, NFS4_FHSIZE);
370 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
372 if (status == nfserr_symlink)
373 status = nfserr_notdir;
377 switch (create->cr_type) {
379 /* ugh! we have to null-terminate the linktext, or
380 * vfs_symlink() will choke. it is always safe to
381 * null-terminate by brute force, since at worst we
382 * will overwrite the first byte of the create namelen
383 * in the XDR buffer, which has already been extracted
386 create->cr_linkname[create->cr_linklen] = 0;
388 status = nfsd_symlink(rqstp, &cstate->current_fh,
389 create->cr_name, create->cr_namelen,
390 create->cr_linkname, create->cr_linklen,
391 &resfh, &create->cr_iattr);
395 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
396 if (MAJOR(rdev) != create->cr_specdata1 ||
397 MINOR(rdev) != create->cr_specdata2)
399 status = nfsd_create(rqstp, &cstate->current_fh,
400 create->cr_name, create->cr_namelen,
401 &create->cr_iattr, S_IFBLK, rdev, &resfh);
405 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
406 if (MAJOR(rdev) != create->cr_specdata1 ||
407 MINOR(rdev) != create->cr_specdata2)
409 status = nfsd_create(rqstp, &cstate->current_fh,
410 create->cr_name, create->cr_namelen,
411 &create->cr_iattr,S_IFCHR, rdev, &resfh);
415 status = nfsd_create(rqstp, &cstate->current_fh,
416 create->cr_name, create->cr_namelen,
417 &create->cr_iattr, S_IFSOCK, 0, &resfh);
421 status = nfsd_create(rqstp, &cstate->current_fh,
422 create->cr_name, create->cr_namelen,
423 &create->cr_iattr, S_IFIFO, 0, &resfh);
427 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
428 status = nfsd_create(rqstp, &cstate->current_fh,
429 create->cr_name, create->cr_namelen,
430 &create->cr_iattr, S_IFDIR, 0, &resfh);
434 status = nfserr_badtype;
438 fh_unlock(&cstate->current_fh);
439 set_change_info(&create->cr_cinfo, &cstate->current_fh);
440 fh_dup2(&cstate->current_fh, &resfh);
448 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
449 struct nfsd4_getattr *getattr)
453 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
457 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
460 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
461 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
463 getattr->ga_fhp = &cstate->current_fh;
468 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
469 struct nfsd4_link *link)
471 __be32 status = nfserr_nofilehandle;
473 if (!cstate->save_fh.fh_dentry)
475 status = nfsd_link(rqstp, &cstate->current_fh,
476 link->li_name, link->li_namelen, &cstate->save_fh);
478 set_change_info(&link->li_cinfo, &cstate->current_fh);
483 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
486 struct svc_fh tmp_fh;
489 fh_init(&tmp_fh, NFS4_FHSIZE);
490 ret = exp_pseudoroot(rqstp, &tmp_fh);
493 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
498 return nfsd_lookup(rqstp, &cstate->current_fh,
499 "..", 2, &cstate->current_fh);
503 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504 struct nfsd4_lookup *lookup)
506 return nfsd_lookup(rqstp, &cstate->current_fh,
507 lookup->lo_name, lookup->lo_len,
508 &cstate->current_fh);
512 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
513 struct nfsd4_read *read)
517 /* no need to check permission - this will be done in nfsd_read() */
519 read->rd_filp = NULL;
520 if (read->rd_offset >= OFFSET_MAX)
525 if ((status = nfs4_preprocess_stateid_op(&cstate->current_fh,
527 CHECK_FH | RD_STATE, &read->rd_filp))) {
528 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
532 get_file(read->rd_filp);
536 read->rd_rqstp = rqstp;
537 read->rd_fhp = &cstate->current_fh;
542 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
543 struct nfsd4_readdir *readdir)
545 u64 cookie = readdir->rd_cookie;
546 static const nfs4_verifier zeroverf;
548 /* no need to check permission - this will be done in nfsd_readdir() */
550 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
553 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
554 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
556 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
557 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
558 return nfserr_bad_cookie;
560 readdir->rd_rqstp = rqstp;
561 readdir->rd_fhp = &cstate->current_fh;
566 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
567 struct nfsd4_readlink *readlink)
569 readlink->rl_rqstp = rqstp;
570 readlink->rl_fhp = &cstate->current_fh;
575 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
576 struct nfsd4_remove *remove)
580 if (locks_in_grace())
582 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
583 remove->rm_name, remove->rm_namelen);
584 if (status == nfserr_symlink)
585 return nfserr_notdir;
587 fh_unlock(&cstate->current_fh);
588 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
594 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
595 struct nfsd4_rename *rename)
597 __be32 status = nfserr_nofilehandle;
599 if (!cstate->save_fh.fh_dentry)
601 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
602 & NFSEXP_NOSUBTREECHECK))
604 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
605 rename->rn_snamelen, &cstate->current_fh,
606 rename->rn_tname, rename->rn_tnamelen);
608 /* the underlying filesystem returns different error's than required
609 * by NFSv4. both save_fh and current_fh have been verified.. */
610 if (status == nfserr_isdir)
611 status = nfserr_exist;
612 else if ((status == nfserr_notdir) &&
613 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
614 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
615 status = nfserr_exist;
616 else if (status == nfserr_symlink)
617 status = nfserr_notdir;
620 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
621 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
627 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
628 struct nfsd4_secinfo *secinfo)
631 struct svc_export *exp;
632 struct dentry *dentry;
635 fh_init(&resfh, NFS4_FHSIZE);
636 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
637 secinfo->si_name, secinfo->si_namelen,
641 if (dentry->d_inode == NULL) {
645 secinfo->si_exp = exp;
651 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
652 struct nfsd4_setattr *setattr)
654 __be32 status = nfs_ok;
656 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
658 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
659 &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL);
662 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
666 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
670 if (setattr->sa_acl != NULL)
671 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
675 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
678 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
683 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
684 struct nfsd4_write *write)
686 stateid_t *stateid = &write->wr_stateid;
687 struct file *filp = NULL;
689 __be32 status = nfs_ok;
691 /* no need to check permission - this will be done in nfsd_write() */
693 if (write->wr_offset >= OFFSET_MAX)
697 status = nfs4_preprocess_stateid_op(&cstate->current_fh, stateid,
698 CHECK_FH | WR_STATE, &filp);
704 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
708 write->wr_bytes_written = write->wr_buflen;
709 write->wr_how_written = write->wr_stable_how;
710 p = (u32 *)write->wr_verifier.data;
711 *p++ = nfssvc_boot.tv_sec;
712 *p++ = nfssvc_boot.tv_usec;
714 status = nfsd_write(rqstp, &cstate->current_fh, filp,
715 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
716 write->wr_buflen, &write->wr_how_written);
720 if (status == nfserr_symlink)
721 status = nfserr_inval;
725 /* This routine never returns NFS_OK! If there are no other errors, it
726 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
727 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
728 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
731 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
732 struct nfsd4_verify *verify)
738 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
742 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
743 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
744 return nfserr_attrnotsupp;
745 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
746 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
748 if (verify->ve_attrlen & 3)
752 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
754 count = 4 + (verify->ve_attrlen >> 2);
755 buf = kmalloc(count << 2, GFP_KERNEL);
757 return nfserr_resource;
759 status = nfsd4_encode_fattr(&cstate->current_fh,
760 cstate->current_fh.fh_export,
761 cstate->current_fh.fh_dentry, buf,
762 &count, verify->ve_bmval,
765 /* this means that nfsd4_encode_fattr() ran out of space */
766 if (status == nfserr_resource && count == 0)
767 status = nfserr_not_same;
772 status = nfserr_not_same;
773 if (ntohl(*p++) != verify->ve_attrlen)
775 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
776 status = nfserr_same;
784 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
785 struct nfsd4_verify *verify)
789 status = _nfsd4_verify(rqstp, cstate, verify);
790 return status == nfserr_not_same ? nfs_ok : status;
794 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
795 struct nfsd4_verify *verify)
799 status = _nfsd4_verify(rqstp, cstate, verify);
800 return status == nfserr_same ? nfs_ok : status;
807 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
812 static inline void nfsd4_increment_op_stats(u32 opnum)
814 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
815 nfsdstats.nfs4_opcount[opnum]++;
818 static void cstate_free(struct nfsd4_compound_state *cstate)
822 fh_put(&cstate->current_fh);
823 fh_put(&cstate->save_fh);
824 BUG_ON(cstate->replay_owner);
828 static struct nfsd4_compound_state *cstate_alloc(void)
830 struct nfsd4_compound_state *cstate;
832 cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL);
835 fh_init(&cstate->current_fh, NFS4_FHSIZE);
836 fh_init(&cstate->save_fh, NFS4_FHSIZE);
837 cstate->replay_owner = NULL;
841 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
844 struct nfsd4_operation {
845 nfsd4op_func op_func;
847 /* Most ops require a valid current filehandle; a few don't: */
848 #define ALLOWED_WITHOUT_FH 1
849 /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
850 #define ALLOWED_ON_ABSENT_FS 2
854 static struct nfsd4_operation nfsd4_ops[];
856 static const char *nfsd4_op_name(unsigned opnum);
862 nfsd4_proc_compound(struct svc_rqst *rqstp,
863 struct nfsd4_compoundargs *args,
864 struct nfsd4_compoundres *resp)
867 struct nfsd4_operation *opdesc;
868 struct nfsd4_compound_state *cstate = NULL;
872 resp->xbuf = &rqstp->rq_res;
873 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
874 resp->tagp = resp->p;
875 /* reserve space for: taglen, tag, and opcnt */
876 resp->p += 2 + XDR_QUADLEN(args->taglen);
877 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
878 resp->taglen = args->taglen;
879 resp->tag = args->tag;
884 * According to RFC3010, this takes precedence over all other errors.
886 status = nfserr_minor_vers_mismatch;
887 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
890 status = nfserr_resource;
891 cstate = cstate_alloc();
896 while (!status && resp->opcnt < args->opcnt) {
897 op = &args->ops[resp->opcnt++];
899 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
900 resp->opcnt, args->opcnt, op->opnum,
901 nfsd4_op_name(op->opnum));
904 * The XDR decode routines may have pre-set op->status;
905 * for example, if there is a miscellaneous XDR error
906 * it will be set to nfserr_bad_xdr.
911 /* We must be able to encode a successful response to
912 * this operation, with enough room left over to encode a
913 * failed response to the next operation. If we don't
914 * have enough room, fail with ERR_RESOURCE.
916 slack_bytes = (char *)resp->end - (char *)resp->p;
917 if (slack_bytes < COMPOUND_SLACK_SPACE
918 + COMPOUND_ERR_SLACK_SPACE) {
919 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
920 op->status = nfserr_resource;
924 opdesc = &nfsd4_ops[op->opnum];
926 if (!cstate->current_fh.fh_dentry) {
927 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
928 op->status = nfserr_nofilehandle;
931 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
932 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
933 op->status = nfserr_moved;
938 op->status = opdesc->op_func(rqstp, cstate, &op->u);
940 BUG_ON(op->status == nfs_ok);
943 if (op->status == nfserr_replay_me) {
944 op->replay = &cstate->replay_owner->so_replay;
945 nfsd4_encode_replay(resp, op);
946 status = op->status = op->replay->rp_status;
948 nfsd4_encode_operation(resp, op);
952 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
953 args->ops, args->opcnt, resp->opcnt, op->opnum,
954 be32_to_cpu(status));
956 if (cstate->replay_owner) {
957 nfs4_put_stateowner(cstate->replay_owner);
958 cstate->replay_owner = NULL;
960 /* XXX Ugh, we need to get rid of this kind of special case: */
961 if (op->opnum == OP_READ && op->u.read.rd_filp)
962 fput(op->u.read.rd_filp);
964 nfsd4_increment_op_stats(op->opnum);
969 nfsd4_release_compoundargs(args);
970 dprintk("nfsv4 compound returned %d\n", ntohl(status));
974 static struct nfsd4_operation nfsd4_ops[OP_RELEASE_LOCKOWNER+1] = {
976 .op_func = (nfsd4op_func)nfsd4_access,
977 .op_name = "OP_ACCESS",
980 .op_func = (nfsd4op_func)nfsd4_close,
981 .op_name = "OP_CLOSE",
984 .op_func = (nfsd4op_func)nfsd4_commit,
985 .op_name = "OP_COMMIT",
988 .op_func = (nfsd4op_func)nfsd4_create,
989 .op_name = "OP_CREATE",
992 .op_func = (nfsd4op_func)nfsd4_delegreturn,
993 .op_name = "OP_DELEGRETURN",
996 .op_func = (nfsd4op_func)nfsd4_getattr,
997 .op_flags = ALLOWED_ON_ABSENT_FS,
998 .op_name = "OP_GETATTR",
1001 .op_func = (nfsd4op_func)nfsd4_getfh,
1002 .op_name = "OP_GETFH",
1005 .op_func = (nfsd4op_func)nfsd4_link,
1006 .op_name = "OP_LINK",
1009 .op_func = (nfsd4op_func)nfsd4_lock,
1010 .op_name = "OP_LOCK",
1013 .op_func = (nfsd4op_func)nfsd4_lockt,
1014 .op_name = "OP_LOCKT",
1017 .op_func = (nfsd4op_func)nfsd4_locku,
1018 .op_name = "OP_LOCKU",
1021 .op_func = (nfsd4op_func)nfsd4_lookup,
1022 .op_name = "OP_LOOKUP",
1025 .op_func = (nfsd4op_func)nfsd4_lookupp,
1026 .op_name = "OP_LOOKUPP",
1029 .op_func = (nfsd4op_func)nfsd4_nverify,
1030 .op_name = "OP_NVERIFY",
1033 .op_func = (nfsd4op_func)nfsd4_open,
1034 .op_name = "OP_OPEN",
1036 [OP_OPEN_CONFIRM] = {
1037 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1038 .op_name = "OP_OPEN_CONFIRM",
1040 [OP_OPEN_DOWNGRADE] = {
1041 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1042 .op_name = "OP_OPEN_DOWNGRADE",
1045 .op_func = (nfsd4op_func)nfsd4_putfh,
1046 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1047 .op_name = "OP_PUTFH",
1050 /* unsupported, just for future reference: */
1051 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1052 .op_name = "OP_PUTPUBFH",
1055 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1056 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1057 .op_name = "OP_PUTROOTFH",
1060 .op_func = (nfsd4op_func)nfsd4_read,
1061 .op_name = "OP_READ",
1064 .op_func = (nfsd4op_func)nfsd4_readdir,
1065 .op_name = "OP_READDIR",
1068 .op_func = (nfsd4op_func)nfsd4_readlink,
1069 .op_name = "OP_READLINK",
1072 .op_func = (nfsd4op_func)nfsd4_remove,
1073 .op_name = "OP_REMOVE",
1076 .op_name = "OP_RENAME",
1077 .op_func = (nfsd4op_func)nfsd4_rename,
1080 .op_func = (nfsd4op_func)nfsd4_renew,
1081 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1082 .op_name = "OP_RENEW",
1085 .op_func = (nfsd4op_func)nfsd4_restorefh,
1086 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1087 .op_name = "OP_RESTOREFH",
1090 .op_func = (nfsd4op_func)nfsd4_savefh,
1091 .op_name = "OP_SAVEFH",
1094 .op_func = (nfsd4op_func)nfsd4_secinfo,
1095 .op_name = "OP_SECINFO",
1098 .op_func = (nfsd4op_func)nfsd4_setattr,
1099 .op_name = "OP_SETATTR",
1101 [OP_SETCLIENTID] = {
1102 .op_func = (nfsd4op_func)nfsd4_setclientid,
1103 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1104 .op_name = "OP_SETCLIENTID",
1106 [OP_SETCLIENTID_CONFIRM] = {
1107 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1108 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1109 .op_name = "OP_SETCLIENTID_CONFIRM",
1112 .op_func = (nfsd4op_func)nfsd4_verify,
1113 .op_name = "OP_VERIFY",
1116 .op_func = (nfsd4op_func)nfsd4_write,
1117 .op_name = "OP_WRITE",
1119 [OP_RELEASE_LOCKOWNER] = {
1120 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1121 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1122 .op_name = "OP_RELEASE_LOCKOWNER",
1126 static const char *nfsd4_op_name(unsigned opnum)
1128 if (opnum < ARRAY_SIZE(nfsd4_ops))
1129 return nfsd4_ops[opnum].op_name;
1130 return "unknown_operation";
1133 #define nfs4svc_decode_voidargs NULL
1134 #define nfs4svc_release_void NULL
1135 #define nfsd4_voidres nfsd4_voidargs
1136 #define nfs4svc_release_compound NULL
1137 struct nfsd4_voidargs { int dummy; };
1139 #define PROC(name, argt, rest, relt, cache, respsize) \
1140 { (svc_procfunc) nfsd4_proc_##name, \
1141 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1142 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1143 (kxdrproc_t) nfs4svc_release_##relt, \
1144 sizeof(struct nfsd4_##argt##args), \
1145 sizeof(struct nfsd4_##rest##res), \
1152 * TODO: At the present time, the NFSv4 server does not do XID caching
1153 * of requests. Implementing XID caching would not be a serious problem,
1154 * although it would require a mild change in interfaces since one
1155 * doesn't know whether an NFSv4 request is idempotent until after the
1156 * XDR decode. However, XID caching totally confuses pynfs (Peter
1157 * Astrand's regression testsuite for NFSv4 servers), which reuses
1158 * XID's liberally, so I've left it unimplemented until pynfs generates
1161 static struct svc_procedure nfsd_procedures4[2] = {
1162 PROC(null, void, void, void, RC_NOCACHE, 1),
1163 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
1166 struct svc_version nfsd_version4 = {
1169 .vs_proc = nfsd_procedures4,
1170 .vs_dispatch = nfsd_dispatch,
1171 .vs_xdrsize = NFS4_SVC_XDRSIZE,