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>
49 #include <linux/sunrpc/svc.h>
50 #include <linux/nfsd/nfsd.h>
51 #include <linux/nfsd/cache.h>
52 #include <linux/nfs4.h>
53 #include <linux/nfsd/state.h>
54 #include <linux/nfsd/xdr4.h>
55 #include <linux/nfs4_acl.h>
57 #define NFSDDBG_FACILITY NFSDDBG_PROC
60 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
65 cache_get(&src->fh_export->h);
70 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
74 if (open->op_truncate &&
75 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
79 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
81 if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
82 accmode |= (MAY_WRITE | MAY_TRUNC);
83 accmode |= MAY_OWNER_OVERRIDE;
85 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
91 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
96 fh_init(&resfh, NFS4_FHSIZE);
97 open->op_truncate = 0;
99 if (open->op_create) {
101 * Note: create modes (UNCHECKED,GUARDED...) are the same
104 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
105 open->op_fname.len, &open->op_iattr,
106 &resfh, open->op_createmode,
107 (u32 *)open->op_verf.data, &open->op_truncate);
110 status = nfsd_lookup(rqstp, current_fh,
111 open->op_fname.data, open->op_fname.len, &resfh);
112 fh_unlock(current_fh);
116 set_change_info(&open->op_cinfo, current_fh);
118 /* set reply cache */
119 fh_dup2(current_fh, &resfh);
120 /* XXXJBF: keep a saved svc_fh struct instead?? */
121 open->op_stateowner->so_replay.rp_openfh_len =
122 resfh.fh_handle.fh_size;
123 memcpy(open->op_stateowner->so_replay.rp_openfh,
124 &resfh.fh_handle.fh_base,
125 resfh.fh_handle.fh_size);
127 status = do_open_permission(rqstp, current_fh, open);
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;
158 status = do_open_permission(rqstp, current_fh, open);
165 * nfs4_unlock_state() called in encode
168 nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
171 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
172 (int)open->op_fname.len, open->op_fname.data,
173 open->op_stateowner);
175 if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
178 if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
179 return nfserr_no_grace;
181 /* This check required by spec. */
182 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
185 open->op_stateowner = NULL;
188 /* check seqid for replay. set nfs4_owner */
189 status = nfsd4_process_open1(open);
190 if (status == NFSERR_REPLAY_ME) {
191 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
193 current_fh->fh_handle.fh_size = rp->rp_openfh_len;
194 memcpy(¤t_fh->fh_handle.fh_base, rp->rp_openfh,
196 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
198 dprintk("nfsd4_open: replay failed"
199 " restoring previous filehandle\n");
201 status = NFSERR_REPLAY_ME;
205 if (open->op_claim_type == NFS4_OPEN_CLAIM_NULL) {
207 * This block of code will (1) set CURRENT_FH to the file being opened,
208 * creating it if necessary, (2) set open->op_cinfo,
209 * (3) set open->op_truncate if the file is to be truncated
210 * after opening, (4) do permission checking.
212 status = do_open_lookup(rqstp, current_fh, open);
215 } else if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
217 * The CURRENT_FH is already set to the file being opened. This
218 * block of code will (1) set open->op_cinfo, (2) set
219 * open->op_truncate if the file is to be truncated after opening,
220 * (3) do permission checking.
222 status = do_open_fhandle(rqstp, current_fh, open);
226 printk("NFSD: unsupported OPEN claim type\n");
230 * nfsd4_process_open2() does the actual opening of the file. If
231 * successful, it (1) truncates the file if open->op_truncate was
232 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
234 status = nfsd4_process_open2(rqstp, current_fh, open);
241 * filehandle-manipulating ops.
244 nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
246 if (!current_fh->fh_dentry)
247 return nfserr_nofilehandle;
254 nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
257 current_fh->fh_handle.fh_size = putfh->pf_fhlen;
258 memcpy(¤t_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
259 return fh_verify(rqstp, current_fh, 0, MAY_NOP);
263 nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
268 status = exp_pseudoroot(rqstp->rq_client, current_fh,
271 status = nfsd_setuser(rqstp, current_fh->fh_export);
276 nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
278 if (!save_fh->fh_dentry)
279 return nfserr_restorefh;
281 fh_dup2(current_fh, save_fh);
286 nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
288 if (!current_fh->fh_dentry)
289 return nfserr_nofilehandle;
291 fh_dup2(save_fh, current_fh);
299 nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
301 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
304 access->ac_resp_access = access->ac_req_access;
305 return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
309 nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
313 u32 *p = (u32 *)commit->co_verf.data;
314 *p++ = nfssvc_boot.tv_sec;
315 *p++ = nfssvc_boot.tv_usec;
317 status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
318 if (status == nfserr_symlink)
319 status = nfserr_inval;
324 nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
330 fh_init(&resfh, NFS4_FHSIZE);
332 status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
333 if (status == nfserr_symlink)
334 status = nfserr_notdir;
338 switch (create->cr_type) {
340 /* ugh! we have to null-terminate the linktext, or
341 * vfs_symlink() will choke. it is always safe to
342 * null-terminate by brute force, since at worst we
343 * will overwrite the first byte of the create namelen
344 * in the XDR buffer, which has already been extracted
347 create->cr_linkname[create->cr_linklen] = 0;
349 status = nfsd_symlink(rqstp, current_fh, create->cr_name,
350 create->cr_namelen, create->cr_linkname,
351 create->cr_linklen, &resfh, &create->cr_iattr);
355 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
356 if (MAJOR(rdev) != create->cr_specdata1 ||
357 MINOR(rdev) != create->cr_specdata2)
359 status = nfsd_create(rqstp, current_fh, create->cr_name,
360 create->cr_namelen, &create->cr_iattr,
361 S_IFBLK, rdev, &resfh);
365 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
366 if (MAJOR(rdev) != create->cr_specdata1 ||
367 MINOR(rdev) != create->cr_specdata2)
369 status = nfsd_create(rqstp, current_fh, create->cr_name,
370 create->cr_namelen, &create->cr_iattr,
371 S_IFCHR, rdev, &resfh);
375 status = nfsd_create(rqstp, current_fh, create->cr_name,
376 create->cr_namelen, &create->cr_iattr,
377 S_IFSOCK, 0, &resfh);
381 status = nfsd_create(rqstp, current_fh, create->cr_name,
382 create->cr_namelen, &create->cr_iattr,
387 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
388 status = nfsd_create(rqstp, current_fh, create->cr_name,
389 create->cr_namelen, &create->cr_iattr,
394 status = nfserr_badtype;
398 fh_unlock(current_fh);
399 set_change_info(&create->cr_cinfo, current_fh);
400 fh_dup2(current_fh, &resfh);
408 nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
412 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
416 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
419 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
420 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
422 getattr->ga_fhp = current_fh;
427 nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
428 struct svc_fh *save_fh, struct nfsd4_link *link)
430 int status = nfserr_nofilehandle;
432 if (!save_fh->fh_dentry)
434 status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
436 set_change_info(&link->li_cinfo, current_fh);
441 nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
443 struct svc_fh tmp_fh;
446 fh_init(&tmp_fh, NFS4_FHSIZE);
447 if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
448 &rqstp->rq_chandle)) != 0)
450 if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
455 return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
459 nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
461 return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
465 access_bits_permit_read(unsigned long access_bmap)
467 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
468 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
472 access_bits_permit_write(unsigned long access_bmap)
474 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
475 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
479 nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
481 struct nfs4_stateid *stp;
484 /* no need to check permission - this will be done in nfsd_read() */
488 if (read->rd_offset >= OFFSET_MAX)
493 /* For stateid -1, we don't check share reservations. */
494 if (ONE_STATEID(&read->rd_stateid)) {
495 dprintk("NFSD: nfsd4_read: -1 stateid...\n");
499 * For stateid 0, the client doesn't have to have the file open, but
500 * we still check for share reservation conflicts.
502 if (ZERO_STATEID(&read->rd_stateid)) {
503 dprintk("NFSD: nfsd4_read: zero stateid...\n");
504 if ((status = nfs4_share_conflict(current_fh, NFS4_SHARE_DENY_READ))) {
505 dprintk("NFSD: nfsd4_read: conflicting share reservation!\n");
512 if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
513 CHECK_FH | RDWR_STATE, &stp))) {
514 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
517 status = nfserr_openmode;
518 if (!access_bits_permit_read(stp->st_access_bmap)) {
519 dprintk("NFSD: nfsd4_read: file not opened for read!\n");
525 read->rd_rqstp = rqstp;
526 read->rd_fhp = current_fh;
531 nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
533 u64 cookie = readdir->rd_cookie;
534 static const nfs4_verifier zeroverf;
536 /* no need to check permission - this will be done in nfsd_readdir() */
538 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
541 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
542 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
544 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
545 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
546 return nfserr_bad_cookie;
548 readdir->rd_rqstp = rqstp;
549 readdir->rd_fhp = current_fh;
554 nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
556 readlink->rl_rqstp = rqstp;
557 readlink->rl_fhp = current_fh;
562 nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
566 status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
567 if (status == nfserr_symlink)
568 return nfserr_notdir;
570 fh_unlock(current_fh);
571 set_change_info(&remove->rm_cinfo, current_fh);
577 nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
578 struct svc_fh *save_fh, struct nfsd4_rename *rename)
580 int status = nfserr_nofilehandle;
582 if (!save_fh->fh_dentry)
584 status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
585 rename->rn_snamelen, current_fh,
586 rename->rn_tname, rename->rn_tnamelen);
588 /* the underlying filesystem returns different error's than required
589 * by NFSv4. both save_fh and current_fh have been verified.. */
590 if (status == nfserr_isdir)
591 status = nfserr_exist;
592 else if ((status == nfserr_notdir) &&
593 (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
594 S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
595 status = nfserr_exist;
596 else if (status == nfserr_symlink)
597 status = nfserr_notdir;
600 set_change_info(&rename->rn_sinfo, current_fh);
601 set_change_info(&rename->rn_tinfo, save_fh);
607 nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
609 struct nfs4_stateid *stp;
615 if (!current_fh->fh_dentry)
616 return nfserr_nofilehandle;
619 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
621 status = nfserr_bad_stateid;
622 if (ZERO_STATEID(&setattr->sa_stateid) || ONE_STATEID(&setattr->sa_stateid)) {
623 dprintk("NFSD: nfsd4_setattr: magic stateid!\n");
628 if ((status = nfs4_preprocess_stateid_op(current_fh,
629 &setattr->sa_stateid,
630 CHECK_FH | RDWR_STATE, &stp))) {
631 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
634 status = nfserr_openmode;
635 if (!access_bits_permit_write(stp->st_access_bmap)) {
636 dprintk("NFSD: nfsd4_setattr: not opened for write!\n");
642 if (setattr->sa_acl != NULL)
643 status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
646 status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
656 nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
658 struct nfs4_stateid *stp;
659 stateid_t *stateid = &write->wr_stateid;
666 /* no need to check permission - this will be done in nfsd_write() */
668 if (write->wr_offset >= OFFSET_MAX)
672 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
673 dprintk("NFSD: nfsd4_write: zero stateid...\n");
674 if ((status = nfs4_share_conflict(current_fh, NFS4_SHARE_DENY_WRITE))) {
675 dprintk("NFSD: nfsd4_write: conflicting share reservation!\n");
680 if ((status = nfs4_preprocess_stateid_op(current_fh, stateid,
681 CHECK_FH | RDWR_STATE, &stp))) {
682 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
686 status = nfserr_openmode;
687 if (!access_bits_permit_write(stp->st_access_bmap)) {
688 dprintk("NFSD: nfsd4_write: file not open for write!\n");
694 write->wr_bytes_written = write->wr_buflen;
695 write->wr_how_written = write->wr_stable_how;
696 p = (u32 *)write->wr_verifier.data;
697 *p++ = nfssvc_boot.tv_sec;
698 *p++ = nfssvc_boot.tv_usec;
700 status = nfsd_write(rqstp, current_fh, write->wr_offset,
701 write->wr_vec, write->wr_vlen, write->wr_buflen,
702 &write->wr_how_written);
703 if (status == nfserr_symlink)
704 status = nfserr_inval;
711 /* This routine never returns NFS_OK! If there are no other errors, it
712 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
713 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
714 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
717 nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
723 status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
727 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
728 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
729 return nfserr_attrnotsupp;
730 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
731 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
733 if (verify->ve_attrlen & 3)
737 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
739 count = 4 + (verify->ve_attrlen >> 2);
740 buf = kmalloc(count << 2, GFP_KERNEL);
742 return nfserr_resource;
744 status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
745 current_fh->fh_dentry, buf,
746 &count, verify->ve_bmval,
749 /* this means that nfsd4_encode_fattr() ran out of space */
750 if (status == nfserr_resource && count == 0)
751 status = nfserr_not_same;
756 status = nfserr_not_same;
757 if (ntohl(*p++) != verify->ve_attrlen)
759 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
760 status = nfserr_same;
771 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
781 nfsd4_proc_compound(struct svc_rqst *rqstp,
782 struct nfsd4_compoundargs *args,
783 struct nfsd4_compoundres *resp)
786 struct svc_fh *current_fh = NULL;
787 struct svc_fh *save_fh = NULL;
788 int slack_space; /* in words, not bytes! */
791 status = nfserr_resource;
792 current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
793 if (current_fh == NULL)
795 fh_init(current_fh, NFS4_FHSIZE);
796 save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
799 fh_init(save_fh, NFS4_FHSIZE);
801 resp->xbuf = &rqstp->rq_res;
802 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
803 resp->tagp = resp->p;
804 /* reserve space for: taglen, tag, and opcnt */
805 resp->p += 2 + XDR_QUADLEN(args->taglen);
806 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
807 resp->taglen = args->taglen;
808 resp->tag = args->tag;
813 * According to RFC3010, this takes precedence over all other errors.
815 status = nfserr_minor_vers_mismatch;
816 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
820 while (!status && resp->opcnt < args->opcnt) {
821 op = &args->ops[resp->opcnt++];
824 * The XDR decode routines may have pre-set op->status;
825 * for example, if there is a miscellaneous XDR error
826 * it will be set to nfserr_bad_xdr.
831 /* We must be able to encode a successful response to
832 * this operation, with enough room left over to encode a
833 * failed response to the next operation. If we don't
834 * have enough room, fail with ERR_RESOURCE.
836 /* FIXME - is slack_space *really* words, or bytes??? - neilb */
837 slack_space = (char *)resp->end - (char *)resp->p;
838 if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
839 BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
840 op->status = nfserr_resource;
844 /* All operations except RENEW, SETCLIENTID, RESTOREFH
845 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
846 * require a valid current filehandle
848 * SETATTR NOFILEHANDLE error handled in nfsd4_setattr
849 * due to required returned bitmap argument
851 if ((!current_fh->fh_dentry) &&
852 !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
853 (op->opnum == OP_SETCLIENTID) ||
854 (op->opnum == OP_SETCLIENTID_CONFIRM) ||
855 (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
856 (op->opnum == OP_RELEASE_LOCKOWNER) ||
857 (op->opnum == OP_SETATTR))) {
858 op->status = nfserr_nofilehandle;
863 op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
866 op->status = nfsd4_close(rqstp, current_fh, &op->u.close);
867 if (op->u.close.cl_stateowner)
869 &op->u.close.cl_stateowner->so_replay;
872 op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
875 op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
878 op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
881 op->status = nfsd4_getfh(current_fh, &op->u.getfh);
884 op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
887 op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock);
888 if (op->u.lock.lk_stateowner)
890 &op->u.lock.lk_stateowner->so_replay;
893 op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
896 op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku);
897 if (op->u.locku.lu_stateowner)
899 &op->u.locku.lu_stateowner->so_replay;
902 op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
905 op->status = nfsd4_lookupp(rqstp, current_fh);
908 op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
909 if (op->status == nfserr_not_same)
913 op->status = nfsd4_open(rqstp, current_fh, &op->u.open);
914 if (op->u.open.op_stateowner)
916 &op->u.open.op_stateowner->so_replay;
918 case OP_OPEN_CONFIRM:
919 op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm);
920 if (op->u.open_confirm.oc_stateowner)
922 &op->u.open_confirm.oc_stateowner->so_replay;
924 case OP_OPEN_DOWNGRADE:
925 op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade);
926 if (op->u.open_downgrade.od_stateowner)
928 &op->u.open_downgrade.od_stateowner->so_replay;
931 op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
934 op->status = nfsd4_putrootfh(rqstp, current_fh);
937 op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
940 op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
943 op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
946 op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
949 op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
952 op->status = nfsd4_renew(&op->u.renew);
955 op->status = nfsd4_restorefh(current_fh, save_fh);
958 op->status = nfsd4_savefh(current_fh, save_fh);
961 op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
964 op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
966 case OP_SETCLIENTID_CONFIRM:
967 op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
970 op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
971 if (op->status == nfserr_same)
975 op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
977 case OP_RELEASE_LOCKOWNER:
978 op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
981 BUG_ON(op->status == nfs_ok);
986 if (op->status == NFSERR_REPLAY_ME) {
987 nfsd4_encode_replay(resp, op);
988 status = op->status = op->replay->rp_status;
990 nfsd4_encode_operation(resp, op);
996 nfsd4_release_compoundargs(args);
1006 #define nfs4svc_decode_voidargs NULL
1007 #define nfs4svc_release_void NULL
1008 #define nfsd4_voidres nfsd4_voidargs
1009 #define nfs4svc_release_compound NULL
1010 struct nfsd4_voidargs { int dummy; };
1012 #define PROC(name, argt, rest, relt, cache, respsize) \
1013 { (svc_procfunc) nfsd4_proc_##name, \
1014 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1015 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1016 (kxdrproc_t) nfs4svc_release_##relt, \
1017 sizeof(struct nfsd4_##argt##args), \
1018 sizeof(struct nfsd4_##rest##res), \
1025 * TODO: At the present time, the NFSv4 server does not do XID caching
1026 * of requests. Implementing XID caching would not be a serious problem,
1027 * although it would require a mild change in interfaces since one
1028 * doesn't know whether an NFSv4 request is idempotent until after the
1029 * XDR decode. However, XID caching totally confuses pynfs (Peter
1030 * Astrand's regression testsuite for NFSv4 servers), which reuses
1031 * XID's liberally, so I've left it unimplemented until pynfs generates
1034 static struct svc_procedure nfsd_procedures4[2] = {
1035 PROC(null, void, void, void, RC_NOCACHE, 1),
1036 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
1039 struct svc_version nfsd_version4 = {
1042 .vs_proc = nfsd_procedures4,
1043 .vs_dispatch = nfsd_dispatch,
1044 .vs_xdrsize = NFS4_SVC_XDRSIZE,