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 svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
262 struct svc_fh **getfh)
264 if (!cstate->current_fh.fh_dentry)
265 return nfserr_nofilehandle;
267 *getfh = &cstate->current_fh;
272 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
273 struct nfsd4_putfh *putfh)
275 fh_put(&cstate->current_fh);
276 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
277 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
279 return fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
283 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
288 fh_put(&cstate->current_fh);
289 status = exp_pseudoroot(rqstp, &cstate->current_fh);
294 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
297 if (!cstate->save_fh.fh_dentry)
298 return nfserr_restorefh;
300 fh_dup2(&cstate->current_fh, &cstate->save_fh);
305 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
308 if (!cstate->current_fh.fh_dentry)
309 return nfserr_nofilehandle;
311 fh_dup2(&cstate->save_fh, &cstate->current_fh);
319 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
320 struct nfsd4_access *access)
322 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
325 access->ac_resp_access = access->ac_req_access;
326 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
327 &access->ac_supported);
331 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
332 struct nfsd4_commit *commit)
336 u32 *p = (u32 *)commit->co_verf.data;
337 *p++ = nfssvc_boot.tv_sec;
338 *p++ = nfssvc_boot.tv_usec;
340 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
342 if (status == nfserr_symlink)
343 status = nfserr_inval;
348 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
349 struct nfsd4_create *create)
355 fh_init(&resfh, NFS4_FHSIZE);
357 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, MAY_CREATE);
358 if (status == nfserr_symlink)
359 status = nfserr_notdir;
363 switch (create->cr_type) {
365 /* ugh! we have to null-terminate the linktext, or
366 * vfs_symlink() will choke. it is always safe to
367 * null-terminate by brute force, since at worst we
368 * will overwrite the first byte of the create namelen
369 * in the XDR buffer, which has already been extracted
372 create->cr_linkname[create->cr_linklen] = 0;
374 status = nfsd_symlink(rqstp, &cstate->current_fh,
375 create->cr_name, create->cr_namelen,
376 create->cr_linkname, create->cr_linklen,
377 &resfh, &create->cr_iattr);
381 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
382 if (MAJOR(rdev) != create->cr_specdata1 ||
383 MINOR(rdev) != create->cr_specdata2)
385 status = nfsd_create(rqstp, &cstate->current_fh,
386 create->cr_name, create->cr_namelen,
387 &create->cr_iattr, S_IFBLK, rdev, &resfh);
391 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
392 if (MAJOR(rdev) != create->cr_specdata1 ||
393 MINOR(rdev) != create->cr_specdata2)
395 status = nfsd_create(rqstp, &cstate->current_fh,
396 create->cr_name, create->cr_namelen,
397 &create->cr_iattr,S_IFCHR, rdev, &resfh);
401 status = nfsd_create(rqstp, &cstate->current_fh,
402 create->cr_name, create->cr_namelen,
403 &create->cr_iattr, S_IFSOCK, 0, &resfh);
407 status = nfsd_create(rqstp, &cstate->current_fh,
408 create->cr_name, create->cr_namelen,
409 &create->cr_iattr, S_IFIFO, 0, &resfh);
413 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
414 status = nfsd_create(rqstp, &cstate->current_fh,
415 create->cr_name, create->cr_namelen,
416 &create->cr_iattr, S_IFDIR, 0, &resfh);
420 status = nfserr_badtype;
424 fh_unlock(&cstate->current_fh);
425 set_change_info(&create->cr_cinfo, &cstate->current_fh);
426 fh_dup2(&cstate->current_fh, &resfh);
434 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
435 struct nfsd4_getattr *getattr)
439 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
443 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
446 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
447 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
449 getattr->ga_fhp = &cstate->current_fh;
454 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
455 struct nfsd4_link *link)
457 __be32 status = nfserr_nofilehandle;
459 if (!cstate->save_fh.fh_dentry)
461 status = nfsd_link(rqstp, &cstate->current_fh,
462 link->li_name, link->li_namelen, &cstate->save_fh);
464 set_change_info(&link->li_cinfo, &cstate->current_fh);
469 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
472 struct svc_fh tmp_fh;
475 fh_init(&tmp_fh, NFS4_FHSIZE);
476 ret = exp_pseudoroot(rqstp, &tmp_fh);
479 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
484 return nfsd_lookup(rqstp, &cstate->current_fh,
485 "..", 2, &cstate->current_fh);
489 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
490 struct nfsd4_lookup *lookup)
492 return nfsd_lookup(rqstp, &cstate->current_fh,
493 lookup->lo_name, lookup->lo_len,
494 &cstate->current_fh);
498 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct nfsd4_read *read)
503 /* no need to check permission - this will be done in nfsd_read() */
505 read->rd_filp = NULL;
506 if (read->rd_offset >= OFFSET_MAX)
511 if ((status = nfs4_preprocess_stateid_op(&cstate->current_fh,
513 CHECK_FH | RD_STATE, &read->rd_filp))) {
514 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
518 get_file(read->rd_filp);
522 read->rd_rqstp = rqstp;
523 read->rd_fhp = &cstate->current_fh;
528 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 struct nfsd4_readdir *readdir)
531 u64 cookie = readdir->rd_cookie;
532 static const nfs4_verifier zeroverf;
534 /* no need to check permission - this will be done in nfsd_readdir() */
536 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
539 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
540 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
542 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
543 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
544 return nfserr_bad_cookie;
546 readdir->rd_rqstp = rqstp;
547 readdir->rd_fhp = &cstate->current_fh;
552 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
553 struct nfsd4_readlink *readlink)
555 readlink->rl_rqstp = rqstp;
556 readlink->rl_fhp = &cstate->current_fh;
561 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
562 struct nfsd4_remove *remove)
568 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
569 remove->rm_name, remove->rm_namelen);
570 if (status == nfserr_symlink)
571 return nfserr_notdir;
573 fh_unlock(&cstate->current_fh);
574 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
580 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
581 struct nfsd4_rename *rename)
583 __be32 status = nfserr_nofilehandle;
585 if (!cstate->save_fh.fh_dentry)
587 if (nfs4_in_grace() && !(cstate->save_fh.fh_export->ex_flags
588 & NFSEXP_NOSUBTREECHECK))
590 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
591 rename->rn_snamelen, &cstate->current_fh,
592 rename->rn_tname, rename->rn_tnamelen);
594 /* the underlying filesystem returns different error's than required
595 * by NFSv4. both save_fh and current_fh have been verified.. */
596 if (status == nfserr_isdir)
597 status = nfserr_exist;
598 else if ((status == nfserr_notdir) &&
599 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
600 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
601 status = nfserr_exist;
602 else if (status == nfserr_symlink)
603 status = nfserr_notdir;
606 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
607 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
613 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
614 struct nfsd4_setattr *setattr)
616 __be32 status = nfs_ok;
618 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
620 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
621 &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL);
624 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
629 if (setattr->sa_acl != NULL)
630 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
634 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
640 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
641 struct nfsd4_write *write)
643 stateid_t *stateid = &write->wr_stateid;
644 struct file *filp = NULL;
646 __be32 status = nfs_ok;
648 /* no need to check permission - this will be done in nfsd_write() */
650 if (write->wr_offset >= OFFSET_MAX)
654 status = nfs4_preprocess_stateid_op(&cstate->current_fh, stateid,
655 CHECK_FH | WR_STATE, &filp);
661 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
665 write->wr_bytes_written = write->wr_buflen;
666 write->wr_how_written = write->wr_stable_how;
667 p = (u32 *)write->wr_verifier.data;
668 *p++ = nfssvc_boot.tv_sec;
669 *p++ = nfssvc_boot.tv_usec;
671 status = nfsd_write(rqstp, &cstate->current_fh, filp,
672 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
673 write->wr_buflen, &write->wr_how_written);
677 if (status == nfserr_symlink)
678 status = nfserr_inval;
682 /* This routine never returns NFS_OK! If there are no other errors, it
683 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
684 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
685 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
688 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
689 struct nfsd4_verify *verify)
695 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
699 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
700 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
701 return nfserr_attrnotsupp;
702 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
703 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
705 if (verify->ve_attrlen & 3)
709 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
711 count = 4 + (verify->ve_attrlen >> 2);
712 buf = kmalloc(count << 2, GFP_KERNEL);
714 return nfserr_resource;
716 status = nfsd4_encode_fattr(&cstate->current_fh,
717 cstate->current_fh.fh_export,
718 cstate->current_fh.fh_dentry, buf,
719 &count, verify->ve_bmval,
722 /* this means that nfsd4_encode_fattr() ran out of space */
723 if (status == nfserr_resource && count == 0)
724 status = nfserr_not_same;
729 status = nfserr_not_same;
730 if (ntohl(*p++) != verify->ve_attrlen)
732 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
733 status = nfserr_same;
741 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 struct nfsd4_verify *verify)
746 status = _nfsd4_verify(rqstp, cstate, verify);
747 return status == nfserr_not_same ? nfs_ok : status;
751 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 struct nfsd4_verify *verify)
756 status = _nfsd4_verify(rqstp, cstate, verify);
757 return status == nfserr_same ? nfs_ok : status;
764 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
769 static inline void nfsd4_increment_op_stats(u32 opnum)
771 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
772 nfsdstats.nfs4_opcount[opnum]++;
775 static void cstate_free(struct nfsd4_compound_state *cstate)
779 fh_put(&cstate->current_fh);
780 fh_put(&cstate->save_fh);
781 BUG_ON(cstate->replay_owner);
785 static struct nfsd4_compound_state *cstate_alloc(void)
787 struct nfsd4_compound_state *cstate;
789 cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL);
792 fh_init(&cstate->current_fh, NFS4_FHSIZE);
793 fh_init(&cstate->save_fh, NFS4_FHSIZE);
794 cstate->replay_owner = NULL;
798 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
801 struct nfsd4_operation {
802 nfsd4op_func op_func;
804 /* Most ops require a valid current filehandle; a few don't: */
805 #define ALLOWED_WITHOUT_FH 1
806 /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
807 #define ALLOWED_ON_ABSENT_FS 2
810 static struct nfsd4_operation nfsd4_ops[];
816 nfsd4_proc_compound(struct svc_rqst *rqstp,
817 struct nfsd4_compoundargs *args,
818 struct nfsd4_compoundres *resp)
821 struct nfsd4_operation *opdesc;
822 struct nfsd4_compound_state *cstate = NULL;
826 status = nfserr_resource;
827 cstate = cstate_alloc();
831 resp->xbuf = &rqstp->rq_res;
832 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
833 resp->tagp = resp->p;
834 /* reserve space for: taglen, tag, and opcnt */
835 resp->p += 2 + XDR_QUADLEN(args->taglen);
836 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
837 resp->taglen = args->taglen;
838 resp->tag = args->tag;
843 * According to RFC3010, this takes precedence over all other errors.
845 status = nfserr_minor_vers_mismatch;
846 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
850 while (!status && resp->opcnt < args->opcnt) {
851 op = &args->ops[resp->opcnt++];
853 dprintk("nfsv4 compound op #%d: %d\n", resp->opcnt, op->opnum);
856 * The XDR decode routines may have pre-set op->status;
857 * for example, if there is a miscellaneous XDR error
858 * it will be set to nfserr_bad_xdr.
863 /* We must be able to encode a successful response to
864 * this operation, with enough room left over to encode a
865 * failed response to the next operation. If we don't
866 * have enough room, fail with ERR_RESOURCE.
868 slack_bytes = (char *)resp->end - (char *)resp->p;
869 if (slack_bytes < COMPOUND_SLACK_SPACE
870 + COMPOUND_ERR_SLACK_SPACE) {
871 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
872 op->status = nfserr_resource;
876 opdesc = &nfsd4_ops[op->opnum];
878 if (!cstate->current_fh.fh_dentry) {
879 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
880 op->status = nfserr_nofilehandle;
883 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
884 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
885 op->status = nfserr_moved;
890 op->status = opdesc->op_func(rqstp, cstate, &op->u);
892 BUG_ON(op->status == nfs_ok);
895 if (op->status == nfserr_replay_me) {
896 op->replay = &cstate->replay_owner->so_replay;
897 nfsd4_encode_replay(resp, op);
898 status = op->status = op->replay->rp_status;
900 nfsd4_encode_operation(resp, op);
903 if (cstate->replay_owner) {
904 nfs4_put_stateowner(cstate->replay_owner);
905 cstate->replay_owner = NULL;
907 /* XXX Ugh, we need to get rid of this kind of special case: */
908 if (op->opnum == OP_READ && op->u.read.rd_filp)
909 fput(op->u.read.rd_filp);
911 nfsd4_increment_op_stats(op->opnum);
915 nfsd4_release_compoundargs(args);
920 static struct nfsd4_operation nfsd4_ops[OP_RELEASE_LOCKOWNER+1] = {
922 .op_func = (nfsd4op_func)nfsd4_access,
925 .op_func = (nfsd4op_func)nfsd4_close,
928 .op_func = (nfsd4op_func)nfsd4_commit,
931 .op_func = (nfsd4op_func)nfsd4_create,
934 .op_func = (nfsd4op_func)nfsd4_delegreturn,
937 .op_func = (nfsd4op_func)nfsd4_getattr,
938 .op_flags = ALLOWED_ON_ABSENT_FS,
941 .op_func = (nfsd4op_func)nfsd4_getfh,
944 .op_func = (nfsd4op_func)nfsd4_link,
947 .op_func = (nfsd4op_func)nfsd4_lock,
950 .op_func = (nfsd4op_func)nfsd4_lockt,
953 .op_func = (nfsd4op_func)nfsd4_locku,
956 .op_func = (nfsd4op_func)nfsd4_lookup,
959 .op_func = (nfsd4op_func)nfsd4_lookupp,
962 .op_func = (nfsd4op_func)nfsd4_nverify,
965 .op_func = (nfsd4op_func)nfsd4_open,
967 [OP_OPEN_CONFIRM] = {
968 .op_func = (nfsd4op_func)nfsd4_open_confirm,
970 [OP_OPEN_DOWNGRADE] = {
971 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
974 .op_func = (nfsd4op_func)nfsd4_putfh,
975 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
978 /* unsupported; just for future reference: */
979 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
982 .op_func = (nfsd4op_func)nfsd4_putrootfh,
983 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
986 .op_func = (nfsd4op_func)nfsd4_read,
989 .op_func = (nfsd4op_func)nfsd4_readdir,
992 .op_func = (nfsd4op_func)nfsd4_readlink,
995 .op_func = (nfsd4op_func)nfsd4_remove,
998 .op_func = (nfsd4op_func)nfsd4_rename,
1001 .op_func = (nfsd4op_func)nfsd4_renew,
1002 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1005 .op_func = (nfsd4op_func)nfsd4_restorefh,
1006 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1009 .op_func = (nfsd4op_func)nfsd4_savefh,
1012 .op_func = (nfsd4op_func)nfsd4_setattr,
1014 [OP_SETCLIENTID] = {
1015 .op_func = (nfsd4op_func)nfsd4_setclientid,
1016 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1018 [OP_SETCLIENTID_CONFIRM] = {
1019 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1020 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1023 .op_func = (nfsd4op_func)nfsd4_verify,
1026 .op_func = (nfsd4op_func)nfsd4_write,
1028 [OP_RELEASE_LOCKOWNER] = {
1029 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1030 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1034 #define nfs4svc_decode_voidargs NULL
1035 #define nfs4svc_release_void NULL
1036 #define nfsd4_voidres nfsd4_voidargs
1037 #define nfs4svc_release_compound NULL
1038 struct nfsd4_voidargs { int dummy; };
1040 #define PROC(name, argt, rest, relt, cache, respsize) \
1041 { (svc_procfunc) nfsd4_proc_##name, \
1042 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1043 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1044 (kxdrproc_t) nfs4svc_release_##relt, \
1045 sizeof(struct nfsd4_##argt##args), \
1046 sizeof(struct nfsd4_##rest##res), \
1053 * TODO: At the present time, the NFSv4 server does not do XID caching
1054 * of requests. Implementing XID caching would not be a serious problem,
1055 * although it would require a mild change in interfaces since one
1056 * doesn't know whether an NFSv4 request is idempotent until after the
1057 * XDR decode. However, XID caching totally confuses pynfs (Peter
1058 * Astrand's regression testsuite for NFSv4 servers), which reuses
1059 * XID's liberally, so I've left it unimplemented until pynfs generates
1062 static struct svc_procedure nfsd_procedures4[2] = {
1063 PROC(null, void, void, void, RC_NOCACHE, 1),
1064 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
1067 struct svc_version nfsd_version4 = {
1070 .vs_proc = nfsd_procedures4,
1071 .vs_dispatch = nfsd_dispatch,
1072 .vs_xdrsize = NFS4_SVC_XDRSIZE,