4 * Server-side procedures for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Note: some routines in this file are just trivial wrappers
38 * (e.g. nfsd4_lookup()) defined solely for the sake of consistent
39 * naming. Since all such routines have been declared "inline",
40 * there shouldn't be any associated overhead. At some point in
41 * the future, I might inline these "by hand" to clean up a
45 #include <linux/param.h>
46 #include <linux/major.h>
47 #include <linux/slab.h>
48 #include <linux/file.h>
50 #include <linux/sunrpc/svc.h>
51 #include <linux/nfsd/nfsd.h>
52 #include <linux/nfsd/cache.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfsd/state.h>
55 #include <linux/nfsd/xdr4.h>
56 #include <linux/nfs4_acl.h>
58 #define NFSDDBG_FACILITY NFSDDBG_PROC
61 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
66 cache_get(&src->fh_export->h);
71 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
75 if (open->op_truncate &&
76 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
79 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
81 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
82 accmode |= (MAY_WRITE | MAY_TRUNC);
83 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
86 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
92 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
98 fh_init(&resfh, NFS4_FHSIZE);
99 open->op_truncate = 0;
101 if (open->op_create) {
103 * Note: create modes (UNCHECKED,GUARDED...) are the same
106 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
107 open->op_fname.len, &open->op_iattr,
108 &resfh, open->op_createmode,
109 (u32 *)open->op_verf.data, &open->op_truncate, &created);
111 status = nfsd_lookup(rqstp, current_fh,
112 open->op_fname.data, open->op_fname.len, &resfh);
113 fh_unlock(current_fh);
118 set_change_info(&open->op_cinfo, current_fh);
120 /* set reply cache */
121 fh_dup2(current_fh, &resfh);
122 open->op_stateowner->so_replay.rp_openfh_len = resfh.fh_handle.fh_size;
123 memcpy(open->op_stateowner->so_replay.rp_openfh,
124 &resfh.fh_handle.fh_base, resfh.fh_handle.fh_size);
127 status = do_open_permission(rqstp, current_fh, open, MAY_NOP);
135 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
139 /* Only reclaims from previously confirmed clients are valid */
140 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
143 /* We don't know the target directory, and therefore can not
144 * set the change info
147 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
149 /* set replay cache */
150 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
151 memcpy(open->op_stateowner->so_replay.rp_openfh,
152 ¤t_fh->fh_handle.fh_base,
153 current_fh->fh_handle.fh_size);
155 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
156 (open->op_iattr.ia_size == 0);
158 status = do_open_permission(rqstp, current_fh, open, MAY_OWNER_OVERRIDE);
165 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
166 struct nfsd4_open *open, struct nfs4_stateowner **replay_owner)
169 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
170 (int)open->op_fname.len, open->op_fname.data,
171 open->op_stateowner);
173 /* This check required by spec. */
174 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
179 /* check seqid for replay. set nfs4_owner */
180 status = nfsd4_process_open1(open);
181 if (status == nfserr_replay_me) {
182 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
183 fh_put(&cstate->current_fh);
184 cstate->current_fh.fh_handle.fh_size = rp->rp_openfh_len;
185 memcpy(&cstate->current_fh.fh_handle.fh_base, rp->rp_openfh,
187 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
189 dprintk("nfsd4_open: replay failed"
190 " restoring previous filehandle\n");
192 status = nfserr_replay_me;
197 /* Openowner is now set, so sequence id will get bumped. Now we need
198 * these checks before we do any creates: */
199 status = nfserr_grace;
200 if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
202 status = nfserr_no_grace;
203 if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
206 switch (open->op_claim_type) {
207 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
208 status = nfserr_inval;
212 case NFS4_OPEN_CLAIM_NULL:
214 * (1) set CURRENT_FH to the file being opened,
215 * creating it if necessary, (2) set open->op_cinfo,
216 * (3) set open->op_truncate if the file is to be
217 * truncated after opening, (4) do permission checking.
219 status = do_open_lookup(rqstp, &cstate->current_fh,
224 case NFS4_OPEN_CLAIM_PREVIOUS:
225 open->op_stateowner->so_confirmed = 1;
227 * The CURRENT_FH is already set to the file being
228 * opened. (1) set open->op_cinfo, (2) set
229 * open->op_truncate if the file is to be truncated
230 * after opening, (3) do permission checking.
232 status = do_open_fhandle(rqstp, &cstate->current_fh,
237 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
238 open->op_stateowner->so_confirmed = 1;
239 printk("NFSD: unsupported OPEN claim type %d\n",
240 open->op_claim_type);
241 status = nfserr_notsupp;
244 printk("NFSD: Invalid OPEN claim type %d\n",
245 open->op_claim_type);
246 status = nfserr_inval;
250 * nfsd4_process_open2() does the actual opening of the file. If
251 * successful, it (1) truncates the file if open->op_truncate was
252 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
254 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
256 if (open->op_stateowner) {
257 nfs4_get_stateowner(open->op_stateowner);
258 *replay_owner = open->op_stateowner;
265 * filehandle-manipulating ops.
268 nfsd4_getfh(struct nfsd4_compound_state *cstate, struct svc_fh **getfh)
270 if (!cstate->current_fh.fh_dentry)
271 return nfserr_nofilehandle;
273 *getfh = &cstate->current_fh;
278 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
279 struct nfsd4_putfh *putfh)
281 fh_put(&cstate->current_fh);
282 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
283 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
285 return fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
289 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
293 fh_put(&cstate->current_fh);
294 status = exp_pseudoroot(rqstp->rq_client, &cstate->current_fh,
300 nfsd4_restorefh(struct nfsd4_compound_state *cstate)
302 if (!cstate->save_fh.fh_dentry)
303 return nfserr_restorefh;
305 fh_dup2(&cstate->current_fh, &cstate->save_fh);
310 nfsd4_savefh(struct nfsd4_compound_state *cstate)
312 if (!cstate->current_fh.fh_dentry)
313 return nfserr_nofilehandle;
315 fh_dup2(&cstate->save_fh, &cstate->current_fh);
323 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
324 struct nfsd4_access *access)
326 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
329 access->ac_resp_access = access->ac_req_access;
330 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
331 &access->ac_supported);
335 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
336 struct nfsd4_commit *commit)
340 u32 *p = (u32 *)commit->co_verf.data;
341 *p++ = nfssvc_boot.tv_sec;
342 *p++ = nfssvc_boot.tv_usec;
344 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
346 if (status == nfserr_symlink)
347 status = nfserr_inval;
352 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
353 struct nfsd4_create *create)
359 fh_init(&resfh, NFS4_FHSIZE);
361 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, MAY_CREATE);
362 if (status == nfserr_symlink)
363 status = nfserr_notdir;
367 switch (create->cr_type) {
369 /* ugh! we have to null-terminate the linktext, or
370 * vfs_symlink() will choke. it is always safe to
371 * null-terminate by brute force, since at worst we
372 * will overwrite the first byte of the create namelen
373 * in the XDR buffer, which has already been extracted
376 create->cr_linkname[create->cr_linklen] = 0;
378 status = nfsd_symlink(rqstp, &cstate->current_fh,
379 create->cr_name, create->cr_namelen,
380 create->cr_linkname, create->cr_linklen,
381 &resfh, &create->cr_iattr);
385 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
386 if (MAJOR(rdev) != create->cr_specdata1 ||
387 MINOR(rdev) != create->cr_specdata2)
389 status = nfsd_create(rqstp, &cstate->current_fh,
390 create->cr_name, create->cr_namelen,
391 &create->cr_iattr, S_IFBLK, rdev, &resfh);
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_IFCHR, rdev, &resfh);
405 status = nfsd_create(rqstp, &cstate->current_fh,
406 create->cr_name, create->cr_namelen,
407 &create->cr_iattr, S_IFSOCK, 0, &resfh);
411 status = nfsd_create(rqstp, &cstate->current_fh,
412 create->cr_name, create->cr_namelen,
413 &create->cr_iattr, S_IFIFO, 0, &resfh);
417 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
418 status = nfsd_create(rqstp, &cstate->current_fh,
419 create->cr_name, create->cr_namelen,
420 &create->cr_iattr, S_IFDIR, 0, &resfh);
424 status = nfserr_badtype;
428 fh_unlock(&cstate->current_fh);
429 set_change_info(&create->cr_cinfo, &cstate->current_fh);
430 fh_dup2(&cstate->current_fh, &resfh);
438 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
439 struct nfsd4_getattr *getattr)
443 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
447 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
450 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
451 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
453 getattr->ga_fhp = &cstate->current_fh;
458 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
459 struct nfsd4_link *link)
461 __be32 status = nfserr_nofilehandle;
463 if (!cstate->save_fh.fh_dentry)
465 status = nfsd_link(rqstp, &cstate->current_fh,
466 link->li_name, link->li_namelen, &cstate->save_fh);
468 set_change_info(&link->li_cinfo, &cstate->current_fh);
473 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
475 struct svc_fh tmp_fh;
478 fh_init(&tmp_fh, NFS4_FHSIZE);
479 if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
480 &rqstp->rq_chandle)) != 0)
482 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
487 return nfsd_lookup(rqstp, &cstate->current_fh,
488 "..", 2, &cstate->current_fh);
492 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
493 struct nfsd4_lookup *lookup)
495 return nfsd_lookup(rqstp, &cstate->current_fh,
496 lookup->lo_name, lookup->lo_len,
497 &cstate->current_fh);
501 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
502 struct nfsd4_read *read)
506 /* no need to check permission - this will be done in nfsd_read() */
508 read->rd_filp = NULL;
509 if (read->rd_offset >= OFFSET_MAX)
514 if ((status = nfs4_preprocess_stateid_op(&cstate->current_fh,
516 CHECK_FH | RD_STATE, &read->rd_filp))) {
517 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
521 get_file(read->rd_filp);
525 read->rd_rqstp = rqstp;
526 read->rd_fhp = &cstate->current_fh;
531 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
532 struct nfsd4_readdir *readdir)
534 u64 cookie = readdir->rd_cookie;
535 static const nfs4_verifier zeroverf;
537 /* no need to check permission - this will be done in nfsd_readdir() */
539 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
542 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
543 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
545 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
546 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
547 return nfserr_bad_cookie;
549 readdir->rd_rqstp = rqstp;
550 readdir->rd_fhp = &cstate->current_fh;
555 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
556 struct nfsd4_readlink *readlink)
558 readlink->rl_rqstp = rqstp;
559 readlink->rl_fhp = &cstate->current_fh;
564 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
565 struct nfsd4_remove *remove)
571 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
572 remove->rm_name, remove->rm_namelen);
573 if (status == nfserr_symlink)
574 return nfserr_notdir;
576 fh_unlock(&cstate->current_fh);
577 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
583 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
584 struct nfsd4_rename *rename)
586 __be32 status = nfserr_nofilehandle;
588 if (!cstate->save_fh.fh_dentry)
590 if (nfs4_in_grace() && !(cstate->save_fh.fh_export->ex_flags
591 & NFSEXP_NOSUBTREECHECK))
593 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
594 rename->rn_snamelen, &cstate->current_fh,
595 rename->rn_tname, rename->rn_tnamelen);
597 /* the underlying filesystem returns different error's than required
598 * by NFSv4. both save_fh and current_fh have been verified.. */
599 if (status == nfserr_isdir)
600 status = nfserr_exist;
601 else if ((status == nfserr_notdir) &&
602 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
603 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
604 status = nfserr_exist;
605 else if (status == nfserr_symlink)
606 status = nfserr_notdir;
609 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
610 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
616 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
617 struct nfsd4_setattr *setattr)
619 __be32 status = nfs_ok;
621 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
623 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
624 &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL);
627 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
632 if (setattr->sa_acl != NULL)
633 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
637 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
643 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
644 struct nfsd4_write *write)
646 stateid_t *stateid = &write->wr_stateid;
647 struct file *filp = NULL;
649 __be32 status = nfs_ok;
651 /* no need to check permission - this will be done in nfsd_write() */
653 if (write->wr_offset >= OFFSET_MAX)
657 status = nfs4_preprocess_stateid_op(&cstate->current_fh, stateid,
658 CHECK_FH | WR_STATE, &filp);
664 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
668 write->wr_bytes_written = write->wr_buflen;
669 write->wr_how_written = write->wr_stable_how;
670 p = (u32 *)write->wr_verifier.data;
671 *p++ = nfssvc_boot.tv_sec;
672 *p++ = nfssvc_boot.tv_usec;
674 status = nfsd_write(rqstp, &cstate->current_fh, filp,
675 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
676 write->wr_buflen, &write->wr_how_written);
680 if (status == nfserr_symlink)
681 status = nfserr_inval;
685 /* This routine never returns NFS_OK! If there are no other errors, it
686 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
687 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
688 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
691 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
692 struct nfsd4_verify *verify)
698 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
702 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
703 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
704 return nfserr_attrnotsupp;
705 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
706 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
708 if (verify->ve_attrlen & 3)
712 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
714 count = 4 + (verify->ve_attrlen >> 2);
715 buf = kmalloc(count << 2, GFP_KERNEL);
717 return nfserr_resource;
719 status = nfsd4_encode_fattr(&cstate->current_fh,
720 cstate->current_fh.fh_export,
721 cstate->current_fh.fh_dentry, buf,
722 &count, verify->ve_bmval,
725 /* this means that nfsd4_encode_fattr() ran out of space */
726 if (status == nfserr_resource && count == 0)
727 status = nfserr_not_same;
732 status = nfserr_not_same;
733 if (ntohl(*p++) != verify->ve_attrlen)
735 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
736 status = nfserr_same;
747 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
752 static inline void nfsd4_increment_op_stats(u32 opnum)
754 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
755 nfsdstats.nfs4_opcount[opnum]++;
758 static void cstate_free(struct nfsd4_compound_state *cstate)
762 fh_put(&cstate->current_fh);
763 fh_put(&cstate->save_fh);
767 static struct nfsd4_compound_state *cstate_alloc(void)
769 struct nfsd4_compound_state *cstate;
771 cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL);
774 fh_init(&cstate->current_fh, NFS4_FHSIZE);
775 fh_init(&cstate->save_fh, NFS4_FHSIZE);
783 nfsd4_proc_compound(struct svc_rqst *rqstp,
784 struct nfsd4_compoundargs *args,
785 struct nfsd4_compoundres *resp)
788 struct nfsd4_compound_state *cstate = NULL;
789 struct nfs4_stateowner *replay_owner = NULL;
793 status = nfserr_resource;
794 cstate = cstate_alloc();
798 resp->xbuf = &rqstp->rq_res;
799 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
800 resp->tagp = resp->p;
801 /* reserve space for: taglen, tag, and opcnt */
802 resp->p += 2 + XDR_QUADLEN(args->taglen);
803 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
804 resp->taglen = args->taglen;
805 resp->tag = args->tag;
810 * According to RFC3010, this takes precedence over all other errors.
812 status = nfserr_minor_vers_mismatch;
813 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
817 while (!status && resp->opcnt < args->opcnt) {
818 op = &args->ops[resp->opcnt++];
820 dprintk("nfsv4 compound op #%d: %d\n", resp->opcnt, op->opnum);
823 * The XDR decode routines may have pre-set op->status;
824 * for example, if there is a miscellaneous XDR error
825 * it will be set to nfserr_bad_xdr.
830 /* We must be able to encode a successful response to
831 * this operation, with enough room left over to encode a
832 * failed response to the next operation. If we don't
833 * have enough room, fail with ERR_RESOURCE.
835 slack_bytes = (char *)resp->end - (char *)resp->p;
836 if (slack_bytes < COMPOUND_SLACK_SPACE
837 + COMPOUND_ERR_SLACK_SPACE) {
838 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
839 op->status = nfserr_resource;
843 /* All operations except RENEW, SETCLIENTID, RESTOREFH
844 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
845 * require a valid current filehandle
847 if (!cstate->current_fh.fh_dentry) {
848 if (!((op->opnum == OP_PUTFH) ||
849 (op->opnum == OP_PUTROOTFH) ||
850 (op->opnum == OP_SETCLIENTID) ||
851 (op->opnum == OP_SETCLIENTID_CONFIRM) ||
852 (op->opnum == OP_RENEW) ||
853 (op->opnum == OP_RESTOREFH) ||
854 (op->opnum == OP_RELEASE_LOCKOWNER))) {
855 op->status = nfserr_nofilehandle;
859 /* Check must be done at start of each operation, except
860 * for GETATTR and ops not listed as returning NFS4ERR_MOVED
862 else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
863 !((op->opnum == OP_GETATTR) ||
864 (op->opnum == OP_PUTROOTFH) ||
865 (op->opnum == OP_PUTPUBFH) ||
866 (op->opnum == OP_RENEW) ||
867 (op->opnum == OP_SETCLIENTID) ||
868 (op->opnum == OP_RELEASE_LOCKOWNER))) {
869 op->status = nfserr_moved;
874 op->status = nfsd4_access(rqstp, cstate,
878 op->status = nfsd4_close(rqstp, cstate,
879 &op->u.close, &replay_owner);
882 op->status = nfsd4_commit(rqstp, cstate,
886 op->status = nfsd4_create(rqstp, cstate,
890 op->status = nfsd4_delegreturn(rqstp, cstate,
894 op->status = nfsd4_getattr(rqstp, cstate,
898 op->status = nfsd4_getfh(cstate, &op->u.getfh);
901 op->status = nfsd4_link(rqstp, cstate, &op->u.link);
904 op->status = nfsd4_lock(rqstp, cstate, &op->u.lock,
908 op->status = nfsd4_lockt(rqstp, cstate, &op->u.lockt);
911 op->status = nfsd4_locku(rqstp, cstate, &op->u.locku,
915 op->status = nfsd4_lookup(rqstp, cstate,
919 op->status = nfsd4_lookupp(rqstp, cstate);
922 op->status = nfsd4_verify(rqstp, cstate,
924 if (op->status == nfserr_not_same)
928 op->status = nfsd4_open(rqstp, cstate,
929 &op->u.open, &replay_owner);
931 case OP_OPEN_CONFIRM:
932 op->status = nfsd4_open_confirm(rqstp, cstate,
936 case OP_OPEN_DOWNGRADE:
937 op->status = nfsd4_open_downgrade(rqstp, cstate,
938 &op->u.open_downgrade,
942 op->status = nfsd4_putfh(rqstp, cstate, &op->u.putfh);
945 op->status = nfsd4_putrootfh(rqstp, cstate);
948 op->status = nfsd4_read(rqstp, cstate, &op->u.read);
951 op->status = nfsd4_readdir(rqstp, cstate,
955 op->status = nfsd4_readlink(rqstp, cstate,
959 op->status = nfsd4_remove(rqstp, cstate,
963 op->status = nfsd4_rename(rqstp, cstate,
967 op->status = nfsd4_renew(&op->u.renew);
970 op->status = nfsd4_restorefh(cstate);
973 op->status = nfsd4_savefh(cstate);
976 op->status = nfsd4_setattr(rqstp, cstate,
980 op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
982 case OP_SETCLIENTID_CONFIRM:
983 op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
986 op->status = nfsd4_verify(rqstp, cstate,
988 if (op->status == nfserr_same)
992 op->status = nfsd4_write(rqstp, cstate, &op->u.write);
994 case OP_RELEASE_LOCKOWNER:
995 op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
998 BUG_ON(op->status == nfs_ok);
1003 if (op->status == nfserr_replay_me) {
1004 op->replay = &replay_owner->so_replay;
1005 nfsd4_encode_replay(resp, op);
1006 status = op->status = op->replay->rp_status;
1008 nfsd4_encode_operation(resp, op);
1009 status = op->status;
1011 if (replay_owner && (replay_owner != (void *)(-1))) {
1012 nfs4_put_stateowner(replay_owner);
1013 replay_owner = NULL;
1015 /* XXX Ugh, we need to get rid of this kind of special case: */
1016 if (op->opnum == OP_READ && op->u.read.rd_filp)
1017 fput(op->u.read.rd_filp);
1019 nfsd4_increment_op_stats(op->opnum);
1023 nfsd4_release_compoundargs(args);
1024 cstate_free(cstate);
1028 #define nfs4svc_decode_voidargs NULL
1029 #define nfs4svc_release_void NULL
1030 #define nfsd4_voidres nfsd4_voidargs
1031 #define nfs4svc_release_compound NULL
1032 struct nfsd4_voidargs { int dummy; };
1034 #define PROC(name, argt, rest, relt, cache, respsize) \
1035 { (svc_procfunc) nfsd4_proc_##name, \
1036 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1037 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1038 (kxdrproc_t) nfs4svc_release_##relt, \
1039 sizeof(struct nfsd4_##argt##args), \
1040 sizeof(struct nfsd4_##rest##res), \
1047 * TODO: At the present time, the NFSv4 server does not do XID caching
1048 * of requests. Implementing XID caching would not be a serious problem,
1049 * although it would require a mild change in interfaces since one
1050 * doesn't know whether an NFSv4 request is idempotent until after the
1051 * XDR decode. However, XID caching totally confuses pynfs (Peter
1052 * Astrand's regression testsuite for NFSv4 servers), which reuses
1053 * XID's liberally, so I've left it unimplemented until pynfs generates
1056 static struct svc_procedure nfsd_procedures4[2] = {
1057 PROC(null, void, void, void, RC_NOCACHE, 1),
1058 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
1061 struct svc_version nfsd_version4 = {
1064 .vs_proc = nfsd_procedures4,
1065 .vs_dispatch = nfsd_dispatch,
1066 .vs_xdrsize = NFS4_SVC_XDRSIZE,