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>
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
59 cache_get(&src->fh_export->h);
64 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
68 if (open->op_truncate &&
69 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
72 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
74 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
75 accmode |= (MAY_WRITE | MAY_TRUNC);
76 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
79 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
85 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
91 fh_init(&resfh, NFS4_FHSIZE);
92 open->op_truncate = 0;
94 if (open->op_create) {
96 * Note: create modes (UNCHECKED,GUARDED...) are the same
99 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
100 open->op_fname.len, &open->op_iattr,
101 &resfh, open->op_createmode,
102 (u32 *)open->op_verf.data, &open->op_truncate, &created);
104 status = nfsd_lookup(rqstp, current_fh,
105 open->op_fname.data, open->op_fname.len, &resfh);
106 fh_unlock(current_fh);
111 set_change_info(&open->op_cinfo, current_fh);
113 /* set reply cache */
114 fh_dup2(current_fh, &resfh);
115 open->op_stateowner->so_replay.rp_openfh_len = resfh.fh_handle.fh_size;
116 memcpy(open->op_stateowner->so_replay.rp_openfh,
117 &resfh.fh_handle.fh_base, resfh.fh_handle.fh_size);
120 status = do_open_permission(rqstp, current_fh, open, MAY_NOP);
128 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
132 /* Only reclaims from previously confirmed clients are valid */
133 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
136 /* We don't know the target directory, and therefore can not
137 * set the change info
140 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
142 /* set replay cache */
143 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
144 memcpy(open->op_stateowner->so_replay.rp_openfh,
145 ¤t_fh->fh_handle.fh_base,
146 current_fh->fh_handle.fh_size);
148 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
149 (open->op_iattr.ia_size == 0);
151 status = do_open_permission(rqstp, current_fh, open, MAY_OWNER_OVERRIDE);
158 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
159 struct nfsd4_open *open)
162 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
163 (int)open->op_fname.len, open->op_fname.data,
164 open->op_stateowner);
166 /* This check required by spec. */
167 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
172 /* check seqid for replay. set nfs4_owner */
173 status = nfsd4_process_open1(open);
174 if (status == nfserr_replay_me) {
175 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
176 fh_put(&cstate->current_fh);
177 cstate->current_fh.fh_handle.fh_size = rp->rp_openfh_len;
178 memcpy(&cstate->current_fh.fh_handle.fh_base, rp->rp_openfh,
180 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
182 dprintk("nfsd4_open: replay failed"
183 " restoring previous filehandle\n");
185 status = nfserr_replay_me;
190 /* Openowner is now set, so sequence id will get bumped. Now we need
191 * these checks before we do any creates: */
192 status = nfserr_grace;
193 if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
195 status = nfserr_no_grace;
196 if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
199 switch (open->op_claim_type) {
200 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
201 status = nfserr_inval;
205 case NFS4_OPEN_CLAIM_NULL:
207 * (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
210 * truncated after opening, (4) do permission checking.
212 status = do_open_lookup(rqstp, &cstate->current_fh,
217 case NFS4_OPEN_CLAIM_PREVIOUS:
218 open->op_stateowner->so_confirmed = 1;
220 * The CURRENT_FH is already set to the file being
221 * opened. (1) set open->op_cinfo, (2) set
222 * open->op_truncate if the file is to be truncated
223 * after opening, (3) do permission checking.
225 status = do_open_fhandle(rqstp, &cstate->current_fh,
230 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
231 open->op_stateowner->so_confirmed = 1;
232 printk("NFSD: unsupported OPEN claim type %d\n",
233 open->op_claim_type);
234 status = nfserr_notsupp;
237 printk("NFSD: Invalid OPEN claim type %d\n",
238 open->op_claim_type);
239 status = nfserr_inval;
243 * nfsd4_process_open2() does the actual opening of the file. If
244 * successful, it (1) truncates the file if open->op_truncate was
245 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
247 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
249 if (open->op_stateowner) {
250 nfs4_get_stateowner(open->op_stateowner);
251 cstate->replay_owner = open->op_stateowner;
258 * filehandle-manipulating ops.
261 nfsd4_getfh(struct nfsd4_compound_state *cstate, struct svc_fh **getfh)
263 if (!cstate->current_fh.fh_dentry)
264 return nfserr_nofilehandle;
266 *getfh = &cstate->current_fh;
271 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
272 struct nfsd4_putfh *putfh)
274 fh_put(&cstate->current_fh);
275 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
276 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
278 return fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
282 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
286 fh_put(&cstate->current_fh);
287 status = exp_pseudoroot(rqstp->rq_client, &cstate->current_fh,
293 nfsd4_restorefh(struct nfsd4_compound_state *cstate)
295 if (!cstate->save_fh.fh_dentry)
296 return nfserr_restorefh;
298 fh_dup2(&cstate->current_fh, &cstate->save_fh);
303 nfsd4_savefh(struct nfsd4_compound_state *cstate)
305 if (!cstate->current_fh.fh_dentry)
306 return nfserr_nofilehandle;
308 fh_dup2(&cstate->save_fh, &cstate->current_fh);
316 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
317 struct nfsd4_access *access)
319 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
322 access->ac_resp_access = access->ac_req_access;
323 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
324 &access->ac_supported);
328 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
329 struct nfsd4_commit *commit)
333 u32 *p = (u32 *)commit->co_verf.data;
334 *p++ = nfssvc_boot.tv_sec;
335 *p++ = nfssvc_boot.tv_usec;
337 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
339 if (status == nfserr_symlink)
340 status = nfserr_inval;
345 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
346 struct nfsd4_create *create)
352 fh_init(&resfh, NFS4_FHSIZE);
354 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, MAY_CREATE);
355 if (status == nfserr_symlink)
356 status = nfserr_notdir;
360 switch (create->cr_type) {
362 /* ugh! we have to null-terminate the linktext, or
363 * vfs_symlink() will choke. it is always safe to
364 * null-terminate by brute force, since at worst we
365 * will overwrite the first byte of the create namelen
366 * in the XDR buffer, which has already been extracted
369 create->cr_linkname[create->cr_linklen] = 0;
371 status = nfsd_symlink(rqstp, &cstate->current_fh,
372 create->cr_name, create->cr_namelen,
373 create->cr_linkname, create->cr_linklen,
374 &resfh, &create->cr_iattr);
378 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
379 if (MAJOR(rdev) != create->cr_specdata1 ||
380 MINOR(rdev) != create->cr_specdata2)
382 status = nfsd_create(rqstp, &cstate->current_fh,
383 create->cr_name, create->cr_namelen,
384 &create->cr_iattr, S_IFBLK, rdev, &resfh);
388 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
389 if (MAJOR(rdev) != create->cr_specdata1 ||
390 MINOR(rdev) != create->cr_specdata2)
392 status = nfsd_create(rqstp, &cstate->current_fh,
393 create->cr_name, create->cr_namelen,
394 &create->cr_iattr,S_IFCHR, rdev, &resfh);
398 status = nfsd_create(rqstp, &cstate->current_fh,
399 create->cr_name, create->cr_namelen,
400 &create->cr_iattr, S_IFSOCK, 0, &resfh);
404 status = nfsd_create(rqstp, &cstate->current_fh,
405 create->cr_name, create->cr_namelen,
406 &create->cr_iattr, S_IFIFO, 0, &resfh);
410 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
411 status = nfsd_create(rqstp, &cstate->current_fh,
412 create->cr_name, create->cr_namelen,
413 &create->cr_iattr, S_IFDIR, 0, &resfh);
417 status = nfserr_badtype;
421 fh_unlock(&cstate->current_fh);
422 set_change_info(&create->cr_cinfo, &cstate->current_fh);
423 fh_dup2(&cstate->current_fh, &resfh);
431 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
432 struct nfsd4_getattr *getattr)
436 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
440 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
443 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
444 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
446 getattr->ga_fhp = &cstate->current_fh;
451 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
452 struct nfsd4_link *link)
454 __be32 status = nfserr_nofilehandle;
456 if (!cstate->save_fh.fh_dentry)
458 status = nfsd_link(rqstp, &cstate->current_fh,
459 link->li_name, link->li_namelen, &cstate->save_fh);
461 set_change_info(&link->li_cinfo, &cstate->current_fh);
466 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
468 struct svc_fh tmp_fh;
471 fh_init(&tmp_fh, NFS4_FHSIZE);
472 if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
473 &rqstp->rq_chandle)) != 0)
475 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
480 return nfsd_lookup(rqstp, &cstate->current_fh,
481 "..", 2, &cstate->current_fh);
485 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
486 struct nfsd4_lookup *lookup)
488 return nfsd_lookup(rqstp, &cstate->current_fh,
489 lookup->lo_name, lookup->lo_len,
490 &cstate->current_fh);
494 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
495 struct nfsd4_read *read)
499 /* no need to check permission - this will be done in nfsd_read() */
501 read->rd_filp = NULL;
502 if (read->rd_offset >= OFFSET_MAX)
507 if ((status = nfs4_preprocess_stateid_op(&cstate->current_fh,
509 CHECK_FH | RD_STATE, &read->rd_filp))) {
510 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
514 get_file(read->rd_filp);
518 read->rd_rqstp = rqstp;
519 read->rd_fhp = &cstate->current_fh;
524 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
525 struct nfsd4_readdir *readdir)
527 u64 cookie = readdir->rd_cookie;
528 static const nfs4_verifier zeroverf;
530 /* no need to check permission - this will be done in nfsd_readdir() */
532 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
535 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
536 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
538 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
539 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
540 return nfserr_bad_cookie;
542 readdir->rd_rqstp = rqstp;
543 readdir->rd_fhp = &cstate->current_fh;
548 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
549 struct nfsd4_readlink *readlink)
551 readlink->rl_rqstp = rqstp;
552 readlink->rl_fhp = &cstate->current_fh;
557 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
558 struct nfsd4_remove *remove)
564 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
565 remove->rm_name, remove->rm_namelen);
566 if (status == nfserr_symlink)
567 return nfserr_notdir;
569 fh_unlock(&cstate->current_fh);
570 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
576 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
577 struct nfsd4_rename *rename)
579 __be32 status = nfserr_nofilehandle;
581 if (!cstate->save_fh.fh_dentry)
583 if (nfs4_in_grace() && !(cstate->save_fh.fh_export->ex_flags
584 & NFSEXP_NOSUBTREECHECK))
586 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
587 rename->rn_snamelen, &cstate->current_fh,
588 rename->rn_tname, rename->rn_tnamelen);
590 /* the underlying filesystem returns different error's than required
591 * by NFSv4. both save_fh and current_fh have been verified.. */
592 if (status == nfserr_isdir)
593 status = nfserr_exist;
594 else if ((status == nfserr_notdir) &&
595 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
596 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
597 status = nfserr_exist;
598 else if (status == nfserr_symlink)
599 status = nfserr_notdir;
602 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
603 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
609 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
610 struct nfsd4_setattr *setattr)
612 __be32 status = nfs_ok;
614 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
616 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
617 &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL);
620 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
625 if (setattr->sa_acl != NULL)
626 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
630 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
636 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
637 struct nfsd4_write *write)
639 stateid_t *stateid = &write->wr_stateid;
640 struct file *filp = NULL;
642 __be32 status = nfs_ok;
644 /* no need to check permission - this will be done in nfsd_write() */
646 if (write->wr_offset >= OFFSET_MAX)
650 status = nfs4_preprocess_stateid_op(&cstate->current_fh, stateid,
651 CHECK_FH | WR_STATE, &filp);
657 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
661 write->wr_bytes_written = write->wr_buflen;
662 write->wr_how_written = write->wr_stable_how;
663 p = (u32 *)write->wr_verifier.data;
664 *p++ = nfssvc_boot.tv_sec;
665 *p++ = nfssvc_boot.tv_usec;
667 status = nfsd_write(rqstp, &cstate->current_fh, filp,
668 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
669 write->wr_buflen, &write->wr_how_written);
673 if (status == nfserr_symlink)
674 status = nfserr_inval;
678 /* This routine never returns NFS_OK! If there are no other errors, it
679 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
680 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
681 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
684 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
685 struct nfsd4_verify *verify)
691 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
695 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
696 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
697 return nfserr_attrnotsupp;
698 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
699 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
701 if (verify->ve_attrlen & 3)
705 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
707 count = 4 + (verify->ve_attrlen >> 2);
708 buf = kmalloc(count << 2, GFP_KERNEL);
710 return nfserr_resource;
712 status = nfsd4_encode_fattr(&cstate->current_fh,
713 cstate->current_fh.fh_export,
714 cstate->current_fh.fh_dentry, buf,
715 &count, verify->ve_bmval,
718 /* this means that nfsd4_encode_fattr() ran out of space */
719 if (status == nfserr_resource && count == 0)
720 status = nfserr_not_same;
725 status = nfserr_not_same;
726 if (ntohl(*p++) != verify->ve_attrlen)
728 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
729 status = nfserr_same;
740 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
745 static inline void nfsd4_increment_op_stats(u32 opnum)
747 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
748 nfsdstats.nfs4_opcount[opnum]++;
751 static void cstate_free(struct nfsd4_compound_state *cstate)
755 fh_put(&cstate->current_fh);
756 fh_put(&cstate->save_fh);
757 BUG_ON(cstate->replay_owner);
761 static struct nfsd4_compound_state *cstate_alloc(void)
763 struct nfsd4_compound_state *cstate;
765 cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL);
768 fh_init(&cstate->current_fh, NFS4_FHSIZE);
769 fh_init(&cstate->save_fh, NFS4_FHSIZE);
770 cstate->replay_owner = NULL;
778 nfsd4_proc_compound(struct svc_rqst *rqstp,
779 struct nfsd4_compoundargs *args,
780 struct nfsd4_compoundres *resp)
783 struct nfsd4_compound_state *cstate = NULL;
787 status = nfserr_resource;
788 cstate = cstate_alloc();
792 resp->xbuf = &rqstp->rq_res;
793 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
794 resp->tagp = resp->p;
795 /* reserve space for: taglen, tag, and opcnt */
796 resp->p += 2 + XDR_QUADLEN(args->taglen);
797 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
798 resp->taglen = args->taglen;
799 resp->tag = args->tag;
804 * According to RFC3010, this takes precedence over all other errors.
806 status = nfserr_minor_vers_mismatch;
807 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
811 while (!status && resp->opcnt < args->opcnt) {
812 op = &args->ops[resp->opcnt++];
814 dprintk("nfsv4 compound op #%d: %d\n", resp->opcnt, op->opnum);
817 * The XDR decode routines may have pre-set op->status;
818 * for example, if there is a miscellaneous XDR error
819 * it will be set to nfserr_bad_xdr.
824 /* We must be able to encode a successful response to
825 * this operation, with enough room left over to encode a
826 * failed response to the next operation. If we don't
827 * have enough room, fail with ERR_RESOURCE.
829 slack_bytes = (char *)resp->end - (char *)resp->p;
830 if (slack_bytes < COMPOUND_SLACK_SPACE
831 + COMPOUND_ERR_SLACK_SPACE) {
832 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
833 op->status = nfserr_resource;
837 /* All operations except RENEW, SETCLIENTID, RESTOREFH
838 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
839 * require a valid current filehandle
841 if (!cstate->current_fh.fh_dentry) {
842 if (!((op->opnum == OP_PUTFH) ||
843 (op->opnum == OP_PUTROOTFH) ||
844 (op->opnum == OP_SETCLIENTID) ||
845 (op->opnum == OP_SETCLIENTID_CONFIRM) ||
846 (op->opnum == OP_RENEW) ||
847 (op->opnum == OP_RESTOREFH) ||
848 (op->opnum == OP_RELEASE_LOCKOWNER))) {
849 op->status = nfserr_nofilehandle;
853 /* Check must be done at start of each operation, except
854 * for GETATTR and ops not listed as returning NFS4ERR_MOVED
856 else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
857 !((op->opnum == OP_GETATTR) ||
858 (op->opnum == OP_PUTROOTFH) ||
859 (op->opnum == OP_PUTPUBFH) ||
860 (op->opnum == OP_RENEW) ||
861 (op->opnum == OP_SETCLIENTID) ||
862 (op->opnum == OP_RELEASE_LOCKOWNER))) {
863 op->status = nfserr_moved;
868 op->status = nfsd4_access(rqstp, cstate,
872 op->status = nfsd4_close(rqstp, cstate,
876 op->status = nfsd4_commit(rqstp, cstate,
880 op->status = nfsd4_create(rqstp, cstate,
884 op->status = nfsd4_delegreturn(rqstp, cstate,
888 op->status = nfsd4_getattr(rqstp, cstate,
892 op->status = nfsd4_getfh(cstate, &op->u.getfh);
895 op->status = nfsd4_link(rqstp, cstate, &op->u.link);
898 op->status = nfsd4_lock(rqstp, cstate, &op->u.lock);
901 op->status = nfsd4_lockt(rqstp, cstate, &op->u.lockt);
904 op->status = nfsd4_locku(rqstp, cstate, &op->u.locku);
907 op->status = nfsd4_lookup(rqstp, cstate,
911 op->status = nfsd4_lookupp(rqstp, cstate);
914 op->status = nfsd4_verify(rqstp, cstate,
916 if (op->status == nfserr_not_same)
920 op->status = nfsd4_open(rqstp, cstate,
923 case OP_OPEN_CONFIRM:
924 op->status = nfsd4_open_confirm(rqstp, cstate,
925 &op->u.open_confirm);
927 case OP_OPEN_DOWNGRADE:
928 op->status = nfsd4_open_downgrade(rqstp, cstate,
929 &op->u.open_downgrade);
932 op->status = nfsd4_putfh(rqstp, cstate, &op->u.putfh);
935 op->status = nfsd4_putrootfh(rqstp, cstate);
938 op->status = nfsd4_read(rqstp, cstate, &op->u.read);
941 op->status = nfsd4_readdir(rqstp, cstate,
945 op->status = nfsd4_readlink(rqstp, cstate,
949 op->status = nfsd4_remove(rqstp, cstate,
953 op->status = nfsd4_rename(rqstp, cstate,
957 op->status = nfsd4_renew(&op->u.renew);
960 op->status = nfsd4_restorefh(cstate);
963 op->status = nfsd4_savefh(cstate);
966 op->status = nfsd4_setattr(rqstp, cstate,
970 op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
972 case OP_SETCLIENTID_CONFIRM:
973 op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
976 op->status = nfsd4_verify(rqstp, cstate,
978 if (op->status == nfserr_same)
982 op->status = nfsd4_write(rqstp, cstate, &op->u.write);
984 case OP_RELEASE_LOCKOWNER:
985 op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
988 BUG_ON(op->status == nfs_ok);
993 if (op->status == nfserr_replay_me) {
994 op->replay = &cstate->replay_owner->so_replay;
995 nfsd4_encode_replay(resp, op);
996 status = op->status = op->replay->rp_status;
998 nfsd4_encode_operation(resp, op);
1001 if (cstate->replay_owner) {
1002 nfs4_put_stateowner(cstate->replay_owner);
1003 cstate->replay_owner = NULL;
1005 /* XXX Ugh, we need to get rid of this kind of special case: */
1006 if (op->opnum == OP_READ && op->u.read.rd_filp)
1007 fput(op->u.read.rd_filp);
1009 nfsd4_increment_op_stats(op->opnum);
1013 nfsd4_release_compoundargs(args);
1014 cstate_free(cstate);
1018 #define nfs4svc_decode_voidargs NULL
1019 #define nfs4svc_release_void NULL
1020 #define nfsd4_voidres nfsd4_voidargs
1021 #define nfs4svc_release_compound NULL
1022 struct nfsd4_voidargs { int dummy; };
1024 #define PROC(name, argt, rest, relt, cache, respsize) \
1025 { (svc_procfunc) nfsd4_proc_##name, \
1026 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1027 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1028 (kxdrproc_t) nfs4svc_release_##relt, \
1029 sizeof(struct nfsd4_##argt##args), \
1030 sizeof(struct nfsd4_##rest##res), \
1037 * TODO: At the present time, the NFSv4 server does not do XID caching
1038 * of requests. Implementing XID caching would not be a serious problem,
1039 * although it would require a mild change in interfaces since one
1040 * doesn't know whether an NFSv4 request is idempotent until after the
1041 * XDR decode. However, XID caching totally confuses pynfs (Peter
1042 * Astrand's regression testsuite for NFSv4 servers), which reuses
1043 * XID's liberally, so I've left it unimplemented until pynfs generates
1046 static struct svc_procedure nfsd_procedures4[2] = {
1047 PROC(null, void, void, void, RC_NOCACHE, 1),
1048 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
1051 struct svc_version nfsd_version4 = {
1054 .vs_proc = nfsd_procedures4,
1055 .vs_dispatch = nfsd_dispatch,
1056 .vs_xdrsize = NFS4_SVC_XDRSIZE,