2 * Server-side procedures for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
36 #include <linux/slab.h>
42 #include "current_stateid.h"
45 #define NFSDDBG_FACILITY NFSDDBG_PROC
47 static u32 nfsd_attrmask[] = {
48 NFSD_WRITEABLE_ATTRS_WORD0,
49 NFSD_WRITEABLE_ATTRS_WORD1,
50 NFSD_WRITEABLE_ATTRS_WORD2
53 static u32 nfsd41_ex_attrmask[] = {
54 NFSD_SUPPATTR_EXCLCREAT_WORD0,
55 NFSD_SUPPATTR_EXCLCREAT_WORD1,
56 NFSD_SUPPATTR_EXCLCREAT_WORD2
60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
61 u32 *bmval, u32 *writable)
63 struct dentry *dentry = cstate->current_fh.fh_dentry;
66 * Check about attributes are supported by the NFSv4 server or not.
67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
69 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
70 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
71 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
72 return nfserr_attrnotsupp;
75 * Check FATTR4_WORD0_ACL can be supported
76 * in current environment or not.
78 if (bmval[0] & FATTR4_WORD0_ACL) {
79 if (!IS_POSIXACL(dentry->d_inode))
80 return nfserr_attrnotsupp;
84 * According to spec, read-only attributes return ERR_INVAL.
87 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
88 (bmval[2] & ~writable[2]))
96 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
97 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
99 __be32 status = nfs_ok;
101 if (open->op_create == NFS4_OPEN_CREATE) {
102 if (open->op_createmode == NFS4_CREATE_UNCHECKED
103 || open->op_createmode == NFS4_CREATE_GUARDED)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd_attrmask);
106 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
107 status = check_attr_support(rqstp, cstate,
108 open->op_bmval, nfsd41_ex_attrmask);
115 is_create_with_attrs(struct nfsd4_open *open)
117 return open->op_create == NFS4_OPEN_CREATE
118 && (open->op_createmode == NFS4_CREATE_UNCHECKED
119 || open->op_createmode == NFS4_CREATE_GUARDED
120 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
124 * if error occurs when setting the acl, just clear the acl bit
125 * in the returned attr bitmap.
128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
129 struct nfs4_acl *acl, u32 *bmval)
133 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
136 * We should probably fail the whole open at this point,
137 * but we've already created the file, so it's too late;
138 * So this seems the least of evils:
140 bmval[0] &= ~FATTR4_WORD0_ACL;
144 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
147 dget(src->fh_dentry);
149 cache_get(&src->fh_export->h);
154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
158 if (open->op_truncate &&
159 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
162 accmode |= NFSD_MAY_READ_IF_EXEC;
164 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
165 accmode |= NFSD_MAY_READ;
166 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
167 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
168 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
169 accmode |= NFSD_MAY_WRITE;
171 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
178 umode_t mode = fh->fh_dentry->d_inode->i_mode;
185 * Using err_symlink as our catch-all case may look odd; but
186 * there's no other obvious error for this case in 4.0, and we
187 * happen to know that it will cause the linux v4 client to do
188 * the right thing on attempts to open something other than a
191 return nfserr_symlink;
195 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
197 struct svc_fh *resfh;
201 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
203 return nfserr_jukebox;
204 fh_init(resfh, NFS4_FHSIZE);
205 open->op_truncate = 0;
207 if (open->op_create) {
208 /* FIXME: check session persistence and pnfs flags.
209 * The nfsv4.1 spec requires the following semantics:
211 * Persistent | pNFS | Server REQUIRED | Client Allowed
212 * Reply Cache | server | |
213 * -------------+--------+-----------------+--------------------
214 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
216 * | | and EXCLUSIVE4 | or EXCLUSIVE4
218 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
219 * yes | no | GUARDED4 | GUARDED4
220 * yes | yes | GUARDED4 | GUARDED4
224 * Note: create modes (UNCHECKED,GUARDED...) are the same
225 * in NFSv4 as in v3 except EXCLUSIVE4_1.
227 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
228 open->op_fname.len, &open->op_iattr,
229 resfh, open->op_createmode,
230 (u32 *)open->op_verf.data,
231 &open->op_truncate, &open->op_created);
234 * Following rfc 3530 14.2.16, use the returned bitmask
235 * to indicate which attributes we used to store the
238 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
239 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
240 FATTR4_WORD1_TIME_MODIFY);
242 status = nfsd_lookup(rqstp, current_fh,
243 open->op_fname.data, open->op_fname.len, resfh);
244 fh_unlock(current_fh);
248 status = nfsd_check_obj_isreg(resfh);
252 if (is_create_with_attrs(open) && open->op_acl != NULL)
253 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
255 /* set reply cache */
256 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
258 accmode = NFSD_MAY_NOP;
259 if (open->op_created)
260 accmode |= NFSD_MAY_OWNER_OVERRIDE;
261 status = do_open_permission(rqstp, resfh, open, accmode);
262 set_change_info(&open->op_cinfo, current_fh);
263 fh_dup2(current_fh, resfh);
271 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
275 /* We don't know the target directory, and therefore can not
276 * set the change info
279 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
281 /* set replay cache */
282 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
283 ¤t_fh->fh_handle);
285 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
286 (open->op_iattr.ia_size == 0);
288 status = do_open_permission(rqstp, current_fh, open,
289 NFSD_MAY_OWNER_OVERRIDE);
295 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
297 struct nfsd4_sessionid *sid =
298 (struct nfsd4_sessionid *)session->se_sessionid.data;
300 clid->cl_boot = sid->clientid.cl_boot;
301 clid->cl_id = sid->clientid.cl_id;
305 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
306 struct nfsd4_open *open)
309 struct nfsd4_compoundres *resp;
310 struct net *net = SVC_NET(rqstp);
311 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
313 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
314 (int)open->op_fname.len, open->op_fname.data,
317 /* This check required by spec. */
318 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
321 open->op_created = 0;
324 * Before RECLAIM_COMPLETE done, server should deny new lock
326 if (nfsd4_has_session(cstate) &&
327 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
328 &cstate->session->se_client->cl_flags) &&
329 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
332 if (nfsd4_has_session(cstate))
333 copy_clientid(&open->op_clientid, cstate->session);
337 /* check seqid for replay. set nfs4_owner */
338 resp = rqstp->rq_resp;
339 status = nfsd4_process_open1(&resp->cstate, open, nn);
340 if (status == nfserr_replay_me) {
341 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
342 fh_put(&cstate->current_fh);
343 fh_copy_shallow(&cstate->current_fh.fh_handle,
345 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
347 dprintk("nfsd4_open: replay failed"
348 " restoring previous filehandle\n");
350 status = nfserr_replay_me;
354 if (open->op_xdr_error) {
355 status = open->op_xdr_error;
359 status = nfsd4_check_open_attributes(rqstp, cstate, open);
363 /* Openowner is now set, so sequence id will get bumped. Now we need
364 * these checks before we do any creates: */
365 status = nfserr_grace;
366 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
368 status = nfserr_no_grace;
369 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
372 switch (open->op_claim_type) {
373 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
374 case NFS4_OPEN_CLAIM_NULL:
375 status = do_open_lookup(rqstp, &cstate->current_fh,
380 case NFS4_OPEN_CLAIM_PREVIOUS:
381 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
382 status = nfs4_check_open_reclaim(&open->op_clientid,
383 cstate->minorversion,
387 case NFS4_OPEN_CLAIM_FH:
388 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
389 status = do_open_fhandle(rqstp, &cstate->current_fh,
394 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
395 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
396 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
397 dprintk("NFSD: unsupported OPEN claim type %d\n",
398 open->op_claim_type);
399 status = nfserr_notsupp;
402 dprintk("NFSD: Invalid OPEN claim type %d\n",
403 open->op_claim_type);
404 status = nfserr_inval;
408 * nfsd4_process_open2() does the actual opening of the file. If
409 * successful, it (1) truncates the file if open->op_truncate was
410 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
412 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
413 WARN_ON(status && open->op_created);
415 nfsd4_cleanup_open_state(open, status);
416 if (open->op_openowner)
417 cstate->replay_owner = &open->op_openowner->oo_owner;
418 nfsd4_bump_seqid(cstate, status);
419 if (!cstate->replay_owner)
425 * OPEN is the only seqid-mutating operation whose decoding can fail
426 * with a seqid-mutating error (specifically, decoding of user names in
427 * the attributes). Therefore we have to do some processing to look up
428 * the stateowner so that we can bump the seqid.
430 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
432 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
434 if (!seqid_mutating_err(ntohl(op->status)))
436 if (nfsd4_has_session(cstate))
438 open->op_xdr_error = op->status;
439 return nfsd4_open(rqstp, cstate, open);
443 * filehandle-manipulating ops.
446 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
447 struct svc_fh **getfh)
449 if (!cstate->current_fh.fh_dentry)
450 return nfserr_nofilehandle;
452 *getfh = &cstate->current_fh;
457 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
458 struct nfsd4_putfh *putfh)
460 fh_put(&cstate->current_fh);
461 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
462 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
464 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
468 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
473 fh_put(&cstate->current_fh);
474 status = exp_pseudoroot(rqstp, &cstate->current_fh);
479 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
482 if (!cstate->save_fh.fh_dentry)
483 return nfserr_restorefh;
485 fh_dup2(&cstate->current_fh, &cstate->save_fh);
486 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
487 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
488 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
494 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
497 if (!cstate->current_fh.fh_dentry)
498 return nfserr_nofilehandle;
500 fh_dup2(&cstate->save_fh, &cstate->current_fh);
501 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
502 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
503 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
512 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
513 struct nfsd4_access *access)
515 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
518 access->ac_resp_access = access->ac_req_access;
519 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
520 &access->ac_supported);
523 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
526 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
528 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
529 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
530 memcpy(verifier->data, verf, sizeof(verifier->data));
534 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
535 struct nfsd4_commit *commit)
537 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
538 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
543 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
544 struct nfsd4_create *create)
550 fh_init(&resfh, NFS4_FHSIZE);
552 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
557 status = check_attr_support(rqstp, cstate, create->cr_bmval,
562 switch (create->cr_type) {
564 /* ugh! we have to null-terminate the linktext, or
565 * vfs_symlink() will choke. it is always safe to
566 * null-terminate by brute force, since at worst we
567 * will overwrite the first byte of the create namelen
568 * in the XDR buffer, which has already been extracted
571 create->cr_linkname[create->cr_linklen] = 0;
573 status = nfsd_symlink(rqstp, &cstate->current_fh,
574 create->cr_name, create->cr_namelen,
575 create->cr_linkname, create->cr_linklen,
576 &resfh, &create->cr_iattr);
580 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
581 if (MAJOR(rdev) != create->cr_specdata1 ||
582 MINOR(rdev) != create->cr_specdata2)
584 status = nfsd_create(rqstp, &cstate->current_fh,
585 create->cr_name, create->cr_namelen,
586 &create->cr_iattr, S_IFBLK, rdev, &resfh);
590 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
591 if (MAJOR(rdev) != create->cr_specdata1 ||
592 MINOR(rdev) != create->cr_specdata2)
594 status = nfsd_create(rqstp, &cstate->current_fh,
595 create->cr_name, create->cr_namelen,
596 &create->cr_iattr,S_IFCHR, rdev, &resfh);
600 status = nfsd_create(rqstp, &cstate->current_fh,
601 create->cr_name, create->cr_namelen,
602 &create->cr_iattr, S_IFSOCK, 0, &resfh);
606 status = nfsd_create(rqstp, &cstate->current_fh,
607 create->cr_name, create->cr_namelen,
608 &create->cr_iattr, S_IFIFO, 0, &resfh);
612 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
613 status = nfsd_create(rqstp, &cstate->current_fh,
614 create->cr_name, create->cr_namelen,
615 &create->cr_iattr, S_IFDIR, 0, &resfh);
619 status = nfserr_badtype;
625 if (create->cr_acl != NULL)
626 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
629 fh_unlock(&cstate->current_fh);
630 set_change_info(&create->cr_cinfo, &cstate->current_fh);
631 fh_dup2(&cstate->current_fh, &resfh);
638 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
639 struct nfsd4_getattr *getattr)
643 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
647 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
650 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
651 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
652 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
654 getattr->ga_fhp = &cstate->current_fh;
659 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
660 struct nfsd4_link *link)
662 __be32 status = nfserr_nofilehandle;
664 if (!cstate->save_fh.fh_dentry)
666 status = nfsd_link(rqstp, &cstate->current_fh,
667 link->li_name, link->li_namelen, &cstate->save_fh);
669 set_change_info(&link->li_cinfo, &cstate->current_fh);
673 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
675 struct svc_fh tmp_fh;
678 fh_init(&tmp_fh, NFS4_FHSIZE);
679 ret = exp_pseudoroot(rqstp, &tmp_fh);
682 if (tmp_fh.fh_dentry == fh->fh_dentry) {
687 return nfsd_lookup(rqstp, fh, "..", 2, fh);
691 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
694 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
698 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
699 struct nfsd4_lookup *lookup)
701 return nfsd_lookup(rqstp, &cstate->current_fh,
702 lookup->lo_name, lookup->lo_len,
703 &cstate->current_fh);
707 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 struct nfsd4_read *read)
712 /* no need to check permission - this will be done in nfsd_read() */
714 read->rd_filp = NULL;
715 if (read->rd_offset >= OFFSET_MAX)
719 * If we do a zero copy read, then a client will see read data
720 * that reflects the state of the file *after* performing the
721 * following compound.
723 * To ensure proper ordering, we therefore turn off zero copy if
724 * the client wants us to do more in this compound:
726 if (!nfsd4_last_compound_op(rqstp))
727 rqstp->rq_splice_ok = false;
731 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
732 cstate, &read->rd_stateid,
733 RD_STATE, &read->rd_filp))) {
734 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
738 get_file(read->rd_filp);
742 read->rd_rqstp = rqstp;
743 read->rd_fhp = &cstate->current_fh;
748 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
749 struct nfsd4_readdir *readdir)
751 u64 cookie = readdir->rd_cookie;
752 static const nfs4_verifier zeroverf;
754 /* no need to check permission - this will be done in nfsd_readdir() */
756 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
759 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
760 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
761 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
763 if ((cookie == 1) || (cookie == 2) ||
764 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
765 return nfserr_bad_cookie;
767 readdir->rd_rqstp = rqstp;
768 readdir->rd_fhp = &cstate->current_fh;
773 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
774 struct nfsd4_readlink *readlink)
776 readlink->rl_rqstp = rqstp;
777 readlink->rl_fhp = &cstate->current_fh;
782 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
783 struct nfsd4_remove *remove)
787 if (locks_in_grace(SVC_NET(rqstp)))
789 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
790 remove->rm_name, remove->rm_namelen);
792 fh_unlock(&cstate->current_fh);
793 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
799 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
800 struct nfsd4_rename *rename)
802 __be32 status = nfserr_nofilehandle;
804 if (!cstate->save_fh.fh_dentry)
806 if (locks_in_grace(SVC_NET(rqstp)) &&
807 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
809 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
810 rename->rn_snamelen, &cstate->current_fh,
811 rename->rn_tname, rename->rn_tnamelen);
813 /* the underlying filesystem returns different error's than required
814 * by NFSv4. both save_fh and current_fh have been verified.. */
815 if (status == nfserr_isdir)
816 status = nfserr_exist;
817 else if ((status == nfserr_notdir) &&
818 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
819 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
820 status = nfserr_exist;
823 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
824 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
830 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
831 struct nfsd4_secinfo *secinfo)
834 struct svc_export *exp;
835 struct dentry *dentry;
838 fh_init(&resfh, NFS4_FHSIZE);
839 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
842 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
843 secinfo->si_name, secinfo->si_namelen,
847 if (dentry->d_inode == NULL) {
851 secinfo->si_exp = exp;
853 if (cstate->minorversion)
854 /* See rfc 5661 section 2.6.3.1.1.8 */
855 fh_put(&cstate->current_fh);
860 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
861 struct nfsd4_secinfo_no_name *sin)
865 switch (sin->sin_style) {
866 case NFS4_SECINFO_STYLE4_CURRENT_FH:
868 case NFS4_SECINFO_STYLE4_PARENT:
869 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
876 exp_get(cstate->current_fh.fh_export);
877 sin->sin_exp = cstate->current_fh.fh_export;
878 fh_put(&cstate->current_fh);
883 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
884 struct nfsd4_setattr *setattr)
886 __be32 status = nfs_ok;
889 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
891 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
892 &setattr->sa_stateid, WR_STATE, NULL);
895 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
899 err = fh_want_write(&cstate->current_fh);
901 return nfserrno(err);
904 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
909 if (setattr->sa_acl != NULL)
910 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
914 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
917 fh_drop_write(&cstate->current_fh);
921 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
924 int buflen = write->wr_buflen;
926 vec[0].iov_base = write->wr_head.iov_base;
927 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
928 buflen -= vec[0].iov_len;
931 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
932 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
933 buflen -= vec[i].iov_len;
940 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
941 struct nfsd4_write *write)
943 stateid_t *stateid = &write->wr_stateid;
944 struct file *filp = NULL;
945 __be32 status = nfs_ok;
949 /* no need to check permission - this will be done in nfsd_write() */
951 if (write->wr_offset >= OFFSET_MAX)
955 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
956 cstate, stateid, WR_STATE, &filp);
959 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
966 cnt = write->wr_buflen;
967 write->wr_how_written = write->wr_stable_how;
968 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
970 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
971 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
973 status = nfsd_write(rqstp, &cstate->current_fh, filp,
974 write->wr_offset, rqstp->rq_vec, nvecs,
975 &cnt, &write->wr_how_written);
979 write->wr_bytes_written = cnt;
984 /* This routine never returns NFS_OK! If there are no other errors, it
985 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
986 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
987 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
990 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
991 struct nfsd4_verify *verify)
997 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1001 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1005 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1006 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1007 return nfserr_inval;
1008 if (verify->ve_attrlen & 3)
1009 return nfserr_inval;
1012 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1014 count = 4 + (verify->ve_attrlen >> 2);
1015 buf = kmalloc(count << 2, GFP_KERNEL);
1017 return nfserr_jukebox;
1020 status = nfsd4_encode_fattr(&cstate->current_fh,
1021 cstate->current_fh.fh_export,
1022 cstate->current_fh.fh_dentry, &p,
1023 count, verify->ve_bmval,
1026 /* this means that nfsd4_encode_fattr() ran out of space */
1027 if (status == nfserr_resource)
1028 status = nfserr_not_same;
1033 p = buf + 1 + ntohl(buf[0]);
1034 status = nfserr_not_same;
1035 if (ntohl(*p++) != verify->ve_attrlen)
1037 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1038 status = nfserr_same;
1046 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1047 struct nfsd4_verify *verify)
1051 status = _nfsd4_verify(rqstp, cstate, verify);
1052 return status == nfserr_not_same ? nfs_ok : status;
1056 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1057 struct nfsd4_verify *verify)
1061 status = _nfsd4_verify(rqstp, cstate, verify);
1062 return status == nfserr_same ? nfs_ok : status;
1069 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1074 static inline void nfsd4_increment_op_stats(u32 opnum)
1076 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1077 nfsdstats.nfs4_opcount[opnum]++;
1080 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1082 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1083 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1084 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1086 enum nfsd4_op_flags {
1087 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1088 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1089 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1090 /* For rfc 5661 section 2.6.3.1.1: */
1091 OP_HANDLES_WRONGSEC = 1 << 3,
1092 OP_IS_PUTFH_LIKE = 1 << 4,
1094 * These are the ops whose result size we estimate before
1095 * encoding, to avoid performing an op then not being able to
1096 * respond or cache a response. This includes writes and setattrs
1097 * as well as the operations usually called "nonidempotent":
1099 OP_MODIFIES_SOMETHING = 1 << 5,
1101 * Cache compounds containing these ops in the xid-based drc:
1102 * We use the DRC for compounds containing non-idempotent
1103 * operations, *except* those that are 4.1-specific (since
1104 * sessions provide their own EOS), and except for stateful
1105 * operations other than setclientid and setclientid_confirm
1106 * (since sequence numbers provide EOS for open, lock, etc in
1109 OP_CACHEME = 1 << 6,
1111 * These are ops which clear current state id.
1113 OP_CLEAR_STATEID = 1 << 7,
1116 struct nfsd4_operation {
1117 nfsd4op_func op_func;
1120 /* Try to get response size before operation */
1121 nfsd4op_rsize op_rsize_bop;
1122 stateid_getter op_get_currentstateid;
1123 stateid_setter op_set_currentstateid;
1126 static struct nfsd4_operation nfsd4_ops[];
1129 static const char *nfsd4_op_name(unsigned opnum);
1133 * Enforce NFSv4.1 COMPOUND ordering rules:
1135 * Also note, enforced elsewhere:
1136 * - SEQUENCE other than as first op results in
1137 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1138 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1139 * (Enforced in nfsd4_bind_conn_to_session().)
1140 * - DESTROY_SESSION must be the final operation in a compound, if
1141 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1142 * (Enforced in nfsd4_destroy_session().)
1144 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1146 struct nfsd4_op *op = &args->ops[0];
1148 /* These ordering requirements don't apply to NFSv4.0: */
1149 if (args->minorversion == 0)
1151 /* This is weird, but OK, not our problem: */
1152 if (args->opcnt == 0)
1154 if (op->status == nfserr_op_illegal)
1156 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1157 return nfserr_op_not_in_session;
1158 if (op->opnum == OP_SEQUENCE)
1160 if (args->opcnt != 1)
1161 return nfserr_not_only_op;
1165 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1167 return &nfsd4_ops[op->opnum];
1170 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1172 return OPDESC(op)->op_flags & OP_CACHEME;
1175 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1177 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1178 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1179 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1180 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1181 struct nfsd4_operation *thisd;
1182 struct nfsd4_operation *nextd;
1184 thisd = OPDESC(this);
1186 * Most ops check wronsec on our own; only the putfh-like ops
1187 * have special rules.
1189 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1192 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1193 * put-filehandle operation if we're not going to use the
1196 if (argp->opcnt == resp->opcnt)
1199 nextd = OPDESC(next);
1201 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1202 * errors themselves as necessary; others should check for them
1205 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1212 nfsd4_proc_compound(struct svc_rqst *rqstp,
1213 struct nfsd4_compoundargs *args,
1214 struct nfsd4_compoundres *resp)
1216 struct nfsd4_op *op;
1217 struct nfsd4_operation *opdesc;
1218 struct nfsd4_compound_state *cstate = &resp->cstate;
1223 resp->xbuf = &rqstp->rq_res;
1224 resp->p = rqstp->rq_res.head[0].iov_base +
1225 rqstp->rq_res.head[0].iov_len;
1226 resp->tagp = resp->p;
1227 /* reserve space for: taglen, tag, and opcnt */
1228 resp->p += 2 + XDR_QUADLEN(args->taglen);
1229 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1230 resp->taglen = args->taglen;
1231 resp->tag = args->tag;
1233 resp->rqstp = rqstp;
1234 resp->cstate.minorversion = args->minorversion;
1235 resp->cstate.replay_owner = NULL;
1236 resp->cstate.session = NULL;
1237 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1238 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1240 * Don't use the deferral mechanism for NFSv4; compounds make it
1241 * too hard to avoid non-idempotency problems.
1243 rqstp->rq_usedeferral = 0;
1246 * According to RFC3010, this takes precedence over all other errors.
1248 status = nfserr_minor_vers_mismatch;
1249 if (args->minorversion > nfsd_supported_minorversion)
1252 status = nfs41_check_op_ordering(args);
1255 op->status = status;
1259 while (!status && resp->opcnt < args->opcnt) {
1260 op = &args->ops[resp->opcnt++];
1262 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1263 resp->opcnt, args->opcnt, op->opnum,
1264 nfsd4_op_name(op->opnum));
1266 * The XDR decode routines may have pre-set op->status;
1267 * for example, if there is a miscellaneous XDR error
1268 * it will be set to nfserr_bad_xdr.
1271 if (op->opnum == OP_OPEN)
1272 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1276 /* We must be able to encode a successful response to
1277 * this operation, with enough room left over to encode a
1278 * failed response to the next operation. If we don't
1279 * have enough room, fail with ERR_RESOURCE.
1281 slack_bytes = (char *)resp->end - (char *)resp->p;
1282 if (slack_bytes < COMPOUND_SLACK_SPACE
1283 + COMPOUND_ERR_SLACK_SPACE) {
1284 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1285 op->status = nfserr_resource;
1289 opdesc = OPDESC(op);
1291 if (!cstate->current_fh.fh_dentry) {
1292 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1293 op->status = nfserr_nofilehandle;
1296 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1297 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1298 op->status = nfserr_moved;
1302 /* If op is non-idempotent */
1303 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1304 plen = opdesc->op_rsize_bop(rqstp, op);
1305 op->status = nfsd4_check_resp_size(resp, plen);
1311 if (opdesc->op_get_currentstateid)
1312 opdesc->op_get_currentstateid(cstate, &op->u);
1313 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1316 if (opdesc->op_set_currentstateid)
1317 opdesc->op_set_currentstateid(cstate, &op->u);
1319 if (opdesc->op_flags & OP_CLEAR_STATEID)
1320 clear_current_stateid(cstate);
1322 if (need_wrongsec_check(rqstp))
1323 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1327 /* Only from SEQUENCE */
1328 if (resp->cstate.status == nfserr_replay_cache) {
1329 dprintk("%s NFS4.1 replay from cache\n", __func__);
1330 status = op->status;
1333 if (op->status == nfserr_replay_me) {
1334 op->replay = &cstate->replay_owner->so_replay;
1335 nfsd4_encode_replay(resp, op);
1336 status = op->status = op->replay->rp_status;
1338 nfsd4_encode_operation(resp, op);
1339 status = op->status;
1342 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1343 args->ops, args->opcnt, resp->opcnt, op->opnum,
1344 be32_to_cpu(status));
1346 if (cstate->replay_owner) {
1347 nfs4_unlock_state();
1348 cstate->replay_owner = NULL;
1350 /* XXX Ugh, we need to get rid of this kind of special case: */
1351 if (op->opnum == OP_READ && op->u.read.rd_filp)
1352 fput(op->u.read.rd_filp);
1354 nfsd4_increment_op_stats(op->opnum);
1357 resp->cstate.status = status;
1358 fh_put(&resp->cstate.current_fh);
1359 fh_put(&resp->cstate.save_fh);
1360 BUG_ON(resp->cstate.replay_owner);
1362 /* Reset deferral mechanism for RPC deferrals */
1363 rqstp->rq_usedeferral = 1;
1364 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1368 #define op_encode_hdr_size (2)
1369 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1370 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1371 #define op_encode_change_info_maxsz (5)
1372 #define nfs4_fattr_bitmap_maxsz (4)
1374 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1375 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1377 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1379 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1380 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1381 op_encode_ace_maxsz)
1383 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1385 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1387 return (op_encode_hdr_size) * sizeof(__be32);
1390 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1392 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1395 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1397 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1400 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1402 return (op_encode_hdr_size + op_encode_change_info_maxsz
1403 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1406 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1408 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1412 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1414 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1418 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1420 return (op_encode_hdr_size + op_encode_stateid_maxsz
1421 + op_encode_change_info_maxsz + 1
1422 + nfs4_fattr_bitmap_maxsz
1423 + op_encode_delegation_maxsz) * sizeof(__be32);
1426 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1428 u32 maxcount = 0, rlen = 0;
1430 maxcount = svc_max_payload(rqstp);
1431 rlen = op->u.read.rd_length;
1433 if (rlen > maxcount)
1436 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1439 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1441 u32 rlen = op->u.readdir.rd_maxcount;
1443 if (rlen > PAGE_SIZE)
1446 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1447 * sizeof(__be32) + rlen;
1450 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1452 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1456 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1458 return (op_encode_hdr_size + op_encode_change_info_maxsz
1459 + op_encode_change_info_maxsz) * sizeof(__be32);
1462 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1464 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1467 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1469 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1472 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1474 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1477 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1479 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1480 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1481 2 + /*eir_server_owner.so_minor_id */\
1482 /* eir_server_owner.so_major_id<> */\
1483 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1484 /* eir_server_scope<> */\
1485 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1486 1 + /* eir_server_impl_id array length */\
1487 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1490 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1492 return (op_encode_hdr_size + \
1493 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1494 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1497 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1499 return (op_encode_hdr_size + \
1500 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1501 2 + /* csr_sequence, csr_flags */\
1502 op_encode_channel_attrs_maxsz + \
1503 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1506 static struct nfsd4_operation nfsd4_ops[] = {
1508 .op_func = (nfsd4op_func)nfsd4_access,
1509 .op_name = "OP_ACCESS",
1512 .op_func = (nfsd4op_func)nfsd4_close,
1513 .op_flags = OP_MODIFIES_SOMETHING,
1514 .op_name = "OP_CLOSE",
1515 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1516 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1517 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1520 .op_func = (nfsd4op_func)nfsd4_commit,
1521 .op_flags = OP_MODIFIES_SOMETHING,
1522 .op_name = "OP_COMMIT",
1523 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1526 .op_func = (nfsd4op_func)nfsd4_create,
1527 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1528 .op_name = "OP_CREATE",
1529 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1531 [OP_DELEGRETURN] = {
1532 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1533 .op_flags = OP_MODIFIES_SOMETHING,
1534 .op_name = "OP_DELEGRETURN",
1535 .op_rsize_bop = nfsd4_only_status_rsize,
1536 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1539 .op_func = (nfsd4op_func)nfsd4_getattr,
1540 .op_flags = ALLOWED_ON_ABSENT_FS,
1541 .op_name = "OP_GETATTR",
1544 .op_func = (nfsd4op_func)nfsd4_getfh,
1545 .op_name = "OP_GETFH",
1548 .op_func = (nfsd4op_func)nfsd4_link,
1549 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1551 .op_name = "OP_LINK",
1552 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1555 .op_func = (nfsd4op_func)nfsd4_lock,
1556 .op_flags = OP_MODIFIES_SOMETHING,
1557 .op_name = "OP_LOCK",
1558 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1559 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1562 .op_func = (nfsd4op_func)nfsd4_lockt,
1563 .op_name = "OP_LOCKT",
1566 .op_func = (nfsd4op_func)nfsd4_locku,
1567 .op_flags = OP_MODIFIES_SOMETHING,
1568 .op_name = "OP_LOCKU",
1569 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1570 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1573 .op_func = (nfsd4op_func)nfsd4_lookup,
1574 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1575 .op_name = "OP_LOOKUP",
1578 .op_func = (nfsd4op_func)nfsd4_lookupp,
1579 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1580 .op_name = "OP_LOOKUPP",
1583 .op_func = (nfsd4op_func)nfsd4_nverify,
1584 .op_name = "OP_NVERIFY",
1587 .op_func = (nfsd4op_func)nfsd4_open,
1588 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1589 .op_name = "OP_OPEN",
1590 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1591 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1593 [OP_OPEN_CONFIRM] = {
1594 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1595 .op_flags = OP_MODIFIES_SOMETHING,
1596 .op_name = "OP_OPEN_CONFIRM",
1597 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1599 [OP_OPEN_DOWNGRADE] = {
1600 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1601 .op_flags = OP_MODIFIES_SOMETHING,
1602 .op_name = "OP_OPEN_DOWNGRADE",
1603 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1604 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1605 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1608 .op_func = (nfsd4op_func)nfsd4_putfh,
1609 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1610 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1612 .op_name = "OP_PUTFH",
1613 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1616 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1617 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1618 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1620 .op_name = "OP_PUTPUBFH",
1621 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1624 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1625 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1626 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1628 .op_name = "OP_PUTROOTFH",
1629 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1632 .op_func = (nfsd4op_func)nfsd4_read,
1633 .op_flags = OP_MODIFIES_SOMETHING,
1634 .op_name = "OP_READ",
1635 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1636 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1639 .op_func = (nfsd4op_func)nfsd4_readdir,
1640 .op_flags = OP_MODIFIES_SOMETHING,
1641 .op_name = "OP_READDIR",
1642 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1645 .op_func = (nfsd4op_func)nfsd4_readlink,
1646 .op_name = "OP_READLINK",
1649 .op_func = (nfsd4op_func)nfsd4_remove,
1650 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1651 .op_name = "OP_REMOVE",
1652 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1655 .op_func = (nfsd4op_func)nfsd4_rename,
1656 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1657 .op_name = "OP_RENAME",
1658 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1661 .op_func = (nfsd4op_func)nfsd4_renew,
1662 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1663 | OP_MODIFIES_SOMETHING,
1664 .op_name = "OP_RENEW",
1665 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1669 .op_func = (nfsd4op_func)nfsd4_restorefh,
1670 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1671 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1672 .op_name = "OP_RESTOREFH",
1673 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1676 .op_func = (nfsd4op_func)nfsd4_savefh,
1677 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1678 .op_name = "OP_SAVEFH",
1679 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1682 .op_func = (nfsd4op_func)nfsd4_secinfo,
1683 .op_flags = OP_HANDLES_WRONGSEC,
1684 .op_name = "OP_SECINFO",
1687 .op_func = (nfsd4op_func)nfsd4_setattr,
1688 .op_name = "OP_SETATTR",
1689 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1690 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1691 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1693 [OP_SETCLIENTID] = {
1694 .op_func = (nfsd4op_func)nfsd4_setclientid,
1695 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1696 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1697 .op_name = "OP_SETCLIENTID",
1698 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1700 [OP_SETCLIENTID_CONFIRM] = {
1701 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1702 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1703 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1704 .op_name = "OP_SETCLIENTID_CONFIRM",
1705 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1708 .op_func = (nfsd4op_func)nfsd4_verify,
1709 .op_name = "OP_VERIFY",
1712 .op_func = (nfsd4op_func)nfsd4_write,
1713 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1714 .op_name = "OP_WRITE",
1715 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1716 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1718 [OP_RELEASE_LOCKOWNER] = {
1719 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1720 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1721 | OP_MODIFIES_SOMETHING,
1722 .op_name = "OP_RELEASE_LOCKOWNER",
1723 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1726 /* NFSv4.1 operations */
1727 [OP_EXCHANGE_ID] = {
1728 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1729 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1730 | OP_MODIFIES_SOMETHING,
1731 .op_name = "OP_EXCHANGE_ID",
1732 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1734 [OP_BACKCHANNEL_CTL] = {
1735 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1736 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1737 .op_name = "OP_BACKCHANNEL_CTL",
1738 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1740 [OP_BIND_CONN_TO_SESSION] = {
1741 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1742 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1743 | OP_MODIFIES_SOMETHING,
1744 .op_name = "OP_BIND_CONN_TO_SESSION",
1745 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1747 [OP_CREATE_SESSION] = {
1748 .op_func = (nfsd4op_func)nfsd4_create_session,
1749 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1750 | OP_MODIFIES_SOMETHING,
1751 .op_name = "OP_CREATE_SESSION",
1752 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1754 [OP_DESTROY_SESSION] = {
1755 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1756 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1757 | OP_MODIFIES_SOMETHING,
1758 .op_name = "OP_DESTROY_SESSION",
1759 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1762 .op_func = (nfsd4op_func)nfsd4_sequence,
1763 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1764 .op_name = "OP_SEQUENCE",
1766 [OP_DESTROY_CLIENTID] = {
1767 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1768 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1769 | OP_MODIFIES_SOMETHING,
1770 .op_name = "OP_DESTROY_CLIENTID",
1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1773 [OP_RECLAIM_COMPLETE] = {
1774 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1775 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1776 .op_name = "OP_RECLAIM_COMPLETE",
1777 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1779 [OP_SECINFO_NO_NAME] = {
1780 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1781 .op_flags = OP_HANDLES_WRONGSEC,
1782 .op_name = "OP_SECINFO_NO_NAME",
1784 [OP_TEST_STATEID] = {
1785 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1786 .op_flags = ALLOWED_WITHOUT_FH,
1787 .op_name = "OP_TEST_STATEID",
1789 [OP_FREE_STATEID] = {
1790 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1791 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1792 .op_name = "OP_FREE_STATEID",
1793 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1794 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1799 static const char *nfsd4_op_name(unsigned opnum)
1801 if (opnum < ARRAY_SIZE(nfsd4_ops))
1802 return nfsd4_ops[opnum].op_name;
1803 return "unknown_operation";
1807 #define nfsd4_voidres nfsd4_voidargs
1808 struct nfsd4_voidargs { int dummy; };
1810 static struct svc_procedure nfsd_procedures4[2] = {
1812 .pc_func = (svc_procfunc) nfsd4_proc_null,
1813 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1814 .pc_argsize = sizeof(struct nfsd4_voidargs),
1815 .pc_ressize = sizeof(struct nfsd4_voidres),
1816 .pc_cachetype = RC_NOCACHE,
1819 [NFSPROC4_COMPOUND] = {
1820 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1821 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1822 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1823 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1824 .pc_ressize = sizeof(struct nfsd4_compoundres),
1825 .pc_release = nfsd4_release_compoundargs,
1826 .pc_cachetype = RC_NOCACHE,
1827 .pc_xdrressize = NFSD_BUFSIZE/4,
1831 struct svc_version nfsd_version4 = {
1834 .vs_proc = nfsd_procedures4,
1835 .vs_dispatch = nfsd_dispatch,
1836 .vs_xdrsize = NFS4_SVC_XDRSIZE,