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;
194 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
196 if (nfsd4_has_session(cstate))
198 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
203 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
205 struct svc_fh *current_fh = &cstate->current_fh;
206 struct svc_fh *resfh;
210 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
212 return nfserr_jukebox;
213 fh_init(resfh, NFS4_FHSIZE);
214 open->op_truncate = 0;
216 if (open->op_create) {
217 /* FIXME: check session persistence and pnfs flags.
218 * The nfsv4.1 spec requires the following semantics:
220 * Persistent | pNFS | Server REQUIRED | Client Allowed
221 * Reply Cache | server | |
222 * -------------+--------+-----------------+--------------------
223 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
225 * | | and EXCLUSIVE4 | or EXCLUSIVE4
227 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
228 * yes | no | GUARDED4 | GUARDED4
229 * yes | yes | GUARDED4 | GUARDED4
233 * Note: create modes (UNCHECKED,GUARDED...) are the same
234 * in NFSv4 as in v3 except EXCLUSIVE4_1.
236 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
237 open->op_fname.len, &open->op_iattr,
238 resfh, open->op_createmode,
239 (u32 *)open->op_verf.data,
240 &open->op_truncate, &open->op_created);
243 * Following rfc 3530 14.2.16, use the returned bitmask
244 * to indicate which attributes we used to store the
247 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
248 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
249 FATTR4_WORD1_TIME_MODIFY);
251 status = nfsd_lookup(rqstp, current_fh,
252 open->op_fname.data, open->op_fname.len, resfh);
253 fh_unlock(current_fh);
257 status = nfsd_check_obj_isreg(resfh);
261 if (is_create_with_attrs(open) && open->op_acl != NULL)
262 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
264 nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
265 accmode = NFSD_MAY_NOP;
266 if (open->op_created)
267 accmode |= NFSD_MAY_OWNER_OVERRIDE;
268 status = do_open_permission(rqstp, resfh, open, accmode);
269 set_change_info(&open->op_cinfo, current_fh);
270 fh_dup2(current_fh, resfh);
278 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
280 struct svc_fh *current_fh = &cstate->current_fh;
283 /* We don't know the target directory, and therefore can not
284 * set the change info
287 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
289 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
291 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
292 (open->op_iattr.ia_size == 0);
294 status = do_open_permission(rqstp, current_fh, open,
295 NFSD_MAY_OWNER_OVERRIDE);
301 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
303 struct nfsd4_sessionid *sid =
304 (struct nfsd4_sessionid *)session->se_sessionid.data;
306 clid->cl_boot = sid->clientid.cl_boot;
307 clid->cl_id = sid->clientid.cl_id;
311 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
312 struct nfsd4_open *open)
315 struct nfsd4_compoundres *resp;
316 struct net *net = SVC_NET(rqstp);
317 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
319 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
320 (int)open->op_fname.len, open->op_fname.data,
323 /* This check required by spec. */
324 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
327 open->op_created = 0;
330 * Before RECLAIM_COMPLETE done, server should deny new lock
332 if (nfsd4_has_session(cstate) &&
333 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
334 &cstate->session->se_client->cl_flags) &&
335 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
338 if (nfsd4_has_session(cstate))
339 copy_clientid(&open->op_clientid, cstate->session);
343 /* check seqid for replay. set nfs4_owner */
344 resp = rqstp->rq_resp;
345 status = nfsd4_process_open1(&resp->cstate, open, nn);
346 if (status == nfserr_replay_me) {
347 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
348 fh_put(&cstate->current_fh);
349 fh_copy_shallow(&cstate->current_fh.fh_handle,
351 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
353 dprintk("nfsd4_open: replay failed"
354 " restoring previous filehandle\n");
356 status = nfserr_replay_me;
360 if (open->op_xdr_error) {
361 status = open->op_xdr_error;
365 status = nfsd4_check_open_attributes(rqstp, cstate, open);
369 /* Openowner is now set, so sequence id will get bumped. Now we need
370 * these checks before we do any creates: */
371 status = nfserr_grace;
372 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
374 status = nfserr_no_grace;
375 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
378 switch (open->op_claim_type) {
379 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
380 case NFS4_OPEN_CLAIM_NULL:
381 status = do_open_lookup(rqstp, cstate, open);
385 case NFS4_OPEN_CLAIM_PREVIOUS:
386 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
387 status = nfs4_check_open_reclaim(&open->op_clientid,
388 cstate->minorversion,
392 case NFS4_OPEN_CLAIM_FH:
393 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
394 status = do_open_fhandle(rqstp, cstate, open);
398 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
399 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
400 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
401 dprintk("NFSD: unsupported OPEN claim type %d\n",
402 open->op_claim_type);
403 status = nfserr_notsupp;
406 dprintk("NFSD: Invalid OPEN claim type %d\n",
407 open->op_claim_type);
408 status = nfserr_inval;
412 * nfsd4_process_open2() does the actual opening of the file. If
413 * successful, it (1) truncates the file if open->op_truncate was
414 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
416 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
417 WARN_ON(status && open->op_created);
419 nfsd4_cleanup_open_state(open, status);
420 if (open->op_openowner && !nfsd4_has_session(cstate))
421 cstate->replay_owner = &open->op_openowner->oo_owner;
422 nfsd4_bump_seqid(cstate, status);
423 if (!cstate->replay_owner)
429 * OPEN is the only seqid-mutating operation whose decoding can fail
430 * with a seqid-mutating error (specifically, decoding of user names in
431 * the attributes). Therefore we have to do some processing to look up
432 * the stateowner so that we can bump the seqid.
434 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
436 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
438 if (!seqid_mutating_err(ntohl(op->status)))
440 if (nfsd4_has_session(cstate))
442 open->op_xdr_error = op->status;
443 return nfsd4_open(rqstp, cstate, open);
447 * filehandle-manipulating ops.
450 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
451 struct svc_fh **getfh)
453 if (!cstate->current_fh.fh_dentry)
454 return nfserr_nofilehandle;
456 *getfh = &cstate->current_fh;
461 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
462 struct nfsd4_putfh *putfh)
464 fh_put(&cstate->current_fh);
465 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
466 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
468 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
472 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
477 fh_put(&cstate->current_fh);
478 status = exp_pseudoroot(rqstp, &cstate->current_fh);
483 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
486 if (!cstate->save_fh.fh_dentry)
487 return nfserr_restorefh;
489 fh_dup2(&cstate->current_fh, &cstate->save_fh);
490 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
491 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
492 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
498 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
501 if (!cstate->current_fh.fh_dentry)
502 return nfserr_nofilehandle;
504 fh_dup2(&cstate->save_fh, &cstate->current_fh);
505 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
506 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
507 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
516 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
517 struct nfsd4_access *access)
519 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
522 access->ac_resp_access = access->ac_req_access;
523 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
524 &access->ac_supported);
527 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
530 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
532 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
533 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
534 memcpy(verifier->data, verf, sizeof(verifier->data));
538 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
539 struct nfsd4_commit *commit)
541 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
542 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
547 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
548 struct nfsd4_create *create)
554 fh_init(&resfh, NFS4_FHSIZE);
556 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
561 status = check_attr_support(rqstp, cstate, create->cr_bmval,
566 switch (create->cr_type) {
568 /* ugh! we have to null-terminate the linktext, or
569 * vfs_symlink() will choke. it is always safe to
570 * null-terminate by brute force, since at worst we
571 * will overwrite the first byte of the create namelen
572 * in the XDR buffer, which has already been extracted
575 create->cr_linkname[create->cr_linklen] = 0;
577 status = nfsd_symlink(rqstp, &cstate->current_fh,
578 create->cr_name, create->cr_namelen,
579 create->cr_linkname, create->cr_linklen,
580 &resfh, &create->cr_iattr);
584 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
585 if (MAJOR(rdev) != create->cr_specdata1 ||
586 MINOR(rdev) != create->cr_specdata2)
588 status = nfsd_create(rqstp, &cstate->current_fh,
589 create->cr_name, create->cr_namelen,
590 &create->cr_iattr, S_IFBLK, rdev, &resfh);
594 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
595 if (MAJOR(rdev) != create->cr_specdata1 ||
596 MINOR(rdev) != create->cr_specdata2)
598 status = nfsd_create(rqstp, &cstate->current_fh,
599 create->cr_name, create->cr_namelen,
600 &create->cr_iattr,S_IFCHR, rdev, &resfh);
604 status = nfsd_create(rqstp, &cstate->current_fh,
605 create->cr_name, create->cr_namelen,
606 &create->cr_iattr, S_IFSOCK, 0, &resfh);
610 status = nfsd_create(rqstp, &cstate->current_fh,
611 create->cr_name, create->cr_namelen,
612 &create->cr_iattr, S_IFIFO, 0, &resfh);
616 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
617 status = nfsd_create(rqstp, &cstate->current_fh,
618 create->cr_name, create->cr_namelen,
619 &create->cr_iattr, S_IFDIR, 0, &resfh);
623 status = nfserr_badtype;
629 if (create->cr_acl != NULL)
630 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
633 fh_unlock(&cstate->current_fh);
634 set_change_info(&create->cr_cinfo, &cstate->current_fh);
635 fh_dup2(&cstate->current_fh, &resfh);
642 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
643 struct nfsd4_getattr *getattr)
647 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
651 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
654 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
655 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
656 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
658 getattr->ga_fhp = &cstate->current_fh;
663 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
664 struct nfsd4_link *link)
666 __be32 status = nfserr_nofilehandle;
668 if (!cstate->save_fh.fh_dentry)
670 status = nfsd_link(rqstp, &cstate->current_fh,
671 link->li_name, link->li_namelen, &cstate->save_fh);
673 set_change_info(&link->li_cinfo, &cstate->current_fh);
677 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
679 struct svc_fh tmp_fh;
682 fh_init(&tmp_fh, NFS4_FHSIZE);
683 ret = exp_pseudoroot(rqstp, &tmp_fh);
686 if (tmp_fh.fh_dentry == fh->fh_dentry) {
691 return nfsd_lookup(rqstp, fh, "..", 2, fh);
695 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
698 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
702 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
703 struct nfsd4_lookup *lookup)
705 return nfsd_lookup(rqstp, &cstate->current_fh,
706 lookup->lo_name, lookup->lo_len,
707 &cstate->current_fh);
711 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
712 struct nfsd4_read *read)
716 /* no need to check permission - this will be done in nfsd_read() */
718 read->rd_filp = NULL;
719 if (read->rd_offset >= OFFSET_MAX)
723 * If we do a zero copy read, then a client will see read data
724 * that reflects the state of the file *after* performing the
725 * following compound.
727 * To ensure proper ordering, we therefore turn off zero copy if
728 * the client wants us to do more in this compound:
730 if (!nfsd4_last_compound_op(rqstp))
731 rqstp->rq_splice_ok = false;
735 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
736 cstate, &read->rd_stateid,
737 RD_STATE, &read->rd_filp))) {
738 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
742 get_file(read->rd_filp);
746 read->rd_rqstp = rqstp;
747 read->rd_fhp = &cstate->current_fh;
752 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
753 struct nfsd4_readdir *readdir)
755 u64 cookie = readdir->rd_cookie;
756 static const nfs4_verifier zeroverf;
758 /* no need to check permission - this will be done in nfsd_readdir() */
760 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
763 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
764 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
765 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
767 if ((cookie == 1) || (cookie == 2) ||
768 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
769 return nfserr_bad_cookie;
771 readdir->rd_rqstp = rqstp;
772 readdir->rd_fhp = &cstate->current_fh;
777 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
778 struct nfsd4_readlink *readlink)
780 readlink->rl_rqstp = rqstp;
781 readlink->rl_fhp = &cstate->current_fh;
786 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
787 struct nfsd4_remove *remove)
791 if (locks_in_grace(SVC_NET(rqstp)))
793 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
794 remove->rm_name, remove->rm_namelen);
796 fh_unlock(&cstate->current_fh);
797 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
803 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
804 struct nfsd4_rename *rename)
806 __be32 status = nfserr_nofilehandle;
808 if (!cstate->save_fh.fh_dentry)
810 if (locks_in_grace(SVC_NET(rqstp)) &&
811 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
813 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
814 rename->rn_snamelen, &cstate->current_fh,
815 rename->rn_tname, rename->rn_tnamelen);
818 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
819 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
824 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
825 struct nfsd4_secinfo *secinfo)
828 struct svc_export *exp;
829 struct dentry *dentry;
832 fh_init(&resfh, NFS4_FHSIZE);
833 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
836 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
837 secinfo->si_name, secinfo->si_namelen,
841 if (dentry->d_inode == NULL) {
845 secinfo->si_exp = exp;
847 if (cstate->minorversion)
848 /* See rfc 5661 section 2.6.3.1.1.8 */
849 fh_put(&cstate->current_fh);
854 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
855 struct nfsd4_secinfo_no_name *sin)
859 switch (sin->sin_style) {
860 case NFS4_SECINFO_STYLE4_CURRENT_FH:
862 case NFS4_SECINFO_STYLE4_PARENT:
863 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
870 exp_get(cstate->current_fh.fh_export);
871 sin->sin_exp = cstate->current_fh.fh_export;
872 fh_put(&cstate->current_fh);
877 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
878 struct nfsd4_setattr *setattr)
880 __be32 status = nfs_ok;
883 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
885 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
886 &setattr->sa_stateid, WR_STATE, NULL);
889 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
893 err = fh_want_write(&cstate->current_fh);
895 return nfserrno(err);
898 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
903 if (setattr->sa_acl != NULL)
904 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
908 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
911 fh_drop_write(&cstate->current_fh);
915 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
918 int buflen = write->wr_buflen;
920 vec[0].iov_base = write->wr_head.iov_base;
921 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
922 buflen -= vec[0].iov_len;
925 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
926 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
927 buflen -= vec[i].iov_len;
934 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
935 struct nfsd4_write *write)
937 stateid_t *stateid = &write->wr_stateid;
938 struct file *filp = NULL;
939 __be32 status = nfs_ok;
943 /* no need to check permission - this will be done in nfsd_write() */
945 if (write->wr_offset >= OFFSET_MAX)
949 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
950 cstate, stateid, WR_STATE, &filp);
953 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
960 cnt = write->wr_buflen;
961 write->wr_how_written = write->wr_stable_how;
962 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
964 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
965 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
967 status = nfsd_write(rqstp, &cstate->current_fh, filp,
968 write->wr_offset, rqstp->rq_vec, nvecs,
969 &cnt, &write->wr_how_written);
973 write->wr_bytes_written = cnt;
978 /* This routine never returns NFS_OK! If there are no other errors, it
979 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
980 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
981 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
984 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
985 struct nfsd4_verify *verify)
991 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
995 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
999 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1000 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1001 return nfserr_inval;
1002 if (verify->ve_attrlen & 3)
1003 return nfserr_inval;
1006 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1008 count = 4 + (verify->ve_attrlen >> 2);
1009 buf = kmalloc(count << 2, GFP_KERNEL);
1011 return nfserr_jukebox;
1014 status = nfsd4_encode_fattr(&cstate->current_fh,
1015 cstate->current_fh.fh_export,
1016 cstate->current_fh.fh_dentry, &p,
1017 count, verify->ve_bmval,
1020 /* this means that nfsd4_encode_fattr() ran out of space */
1021 if (status == nfserr_resource)
1022 status = nfserr_not_same;
1027 p = buf + 1 + ntohl(buf[0]);
1028 status = nfserr_not_same;
1029 if (ntohl(*p++) != verify->ve_attrlen)
1031 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1032 status = nfserr_same;
1040 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1041 struct nfsd4_verify *verify)
1045 status = _nfsd4_verify(rqstp, cstate, verify);
1046 return status == nfserr_not_same ? nfs_ok : status;
1050 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1051 struct nfsd4_verify *verify)
1055 status = _nfsd4_verify(rqstp, cstate, verify);
1056 return status == nfserr_same ? nfs_ok : status;
1063 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1068 static inline void nfsd4_increment_op_stats(u32 opnum)
1070 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1071 nfsdstats.nfs4_opcount[opnum]++;
1074 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1076 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1077 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1078 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1080 enum nfsd4_op_flags {
1081 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1082 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1083 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1084 /* For rfc 5661 section 2.6.3.1.1: */
1085 OP_HANDLES_WRONGSEC = 1 << 3,
1086 OP_IS_PUTFH_LIKE = 1 << 4,
1088 * These are the ops whose result size we estimate before
1089 * encoding, to avoid performing an op then not being able to
1090 * respond or cache a response. This includes writes and setattrs
1091 * as well as the operations usually called "nonidempotent":
1093 OP_MODIFIES_SOMETHING = 1 << 5,
1095 * Cache compounds containing these ops in the xid-based drc:
1096 * We use the DRC for compounds containing non-idempotent
1097 * operations, *except* those that are 4.1-specific (since
1098 * sessions provide their own EOS), and except for stateful
1099 * operations other than setclientid and setclientid_confirm
1100 * (since sequence numbers provide EOS for open, lock, etc in
1103 OP_CACHEME = 1 << 6,
1105 * These are ops which clear current state id.
1107 OP_CLEAR_STATEID = 1 << 7,
1110 struct nfsd4_operation {
1111 nfsd4op_func op_func;
1114 /* Try to get response size before operation */
1115 nfsd4op_rsize op_rsize_bop;
1116 stateid_getter op_get_currentstateid;
1117 stateid_setter op_set_currentstateid;
1120 static struct nfsd4_operation nfsd4_ops[];
1123 static const char *nfsd4_op_name(unsigned opnum);
1127 * Enforce NFSv4.1 COMPOUND ordering rules:
1129 * Also note, enforced elsewhere:
1130 * - SEQUENCE other than as first op results in
1131 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1132 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1133 * (Enforced in nfsd4_bind_conn_to_session().)
1134 * - DESTROY_SESSION must be the final operation in a compound, if
1135 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1136 * (Enforced in nfsd4_destroy_session().)
1138 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1140 struct nfsd4_op *op = &args->ops[0];
1142 /* These ordering requirements don't apply to NFSv4.0: */
1143 if (args->minorversion == 0)
1145 /* This is weird, but OK, not our problem: */
1146 if (args->opcnt == 0)
1148 if (op->status == nfserr_op_illegal)
1150 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1151 return nfserr_op_not_in_session;
1152 if (op->opnum == OP_SEQUENCE)
1154 if (args->opcnt != 1)
1155 return nfserr_not_only_op;
1159 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1161 return &nfsd4_ops[op->opnum];
1164 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1166 return OPDESC(op)->op_flags & OP_CACHEME;
1169 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1171 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1172 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1173 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1174 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1175 struct nfsd4_operation *thisd;
1176 struct nfsd4_operation *nextd;
1178 thisd = OPDESC(this);
1180 * Most ops check wronsec on our own; only the putfh-like ops
1181 * have special rules.
1183 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1186 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1187 * put-filehandle operation if we're not going to use the
1190 if (argp->opcnt == resp->opcnt)
1193 nextd = OPDESC(next);
1195 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1196 * errors themselves as necessary; others should check for them
1199 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1206 nfsd4_proc_compound(struct svc_rqst *rqstp,
1207 struct nfsd4_compoundargs *args,
1208 struct nfsd4_compoundres *resp)
1210 struct nfsd4_op *op;
1211 struct nfsd4_operation *opdesc;
1212 struct nfsd4_compound_state *cstate = &resp->cstate;
1217 resp->xbuf = &rqstp->rq_res;
1218 resp->p = rqstp->rq_res.head[0].iov_base +
1219 rqstp->rq_res.head[0].iov_len;
1220 resp->tagp = resp->p;
1221 /* reserve space for: taglen, tag, and opcnt */
1222 resp->p += 2 + XDR_QUADLEN(args->taglen);
1223 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1224 resp->taglen = args->taglen;
1225 resp->tag = args->tag;
1227 resp->rqstp = rqstp;
1228 resp->cstate.minorversion = args->minorversion;
1229 resp->cstate.replay_owner = NULL;
1230 resp->cstate.session = NULL;
1231 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1232 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1234 * Don't use the deferral mechanism for NFSv4; compounds make it
1235 * too hard to avoid non-idempotency problems.
1237 rqstp->rq_usedeferral = 0;
1240 * According to RFC3010, this takes precedence over all other errors.
1242 status = nfserr_minor_vers_mismatch;
1243 if (args->minorversion > nfsd_supported_minorversion)
1246 status = nfs41_check_op_ordering(args);
1249 op->status = status;
1253 while (!status && resp->opcnt < args->opcnt) {
1254 op = &args->ops[resp->opcnt++];
1256 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1257 resp->opcnt, args->opcnt, op->opnum,
1258 nfsd4_op_name(op->opnum));
1260 * The XDR decode routines may have pre-set op->status;
1261 * for example, if there is a miscellaneous XDR error
1262 * it will be set to nfserr_bad_xdr.
1265 if (op->opnum == OP_OPEN)
1266 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1270 /* We must be able to encode a successful response to
1271 * this operation, with enough room left over to encode a
1272 * failed response to the next operation. If we don't
1273 * have enough room, fail with ERR_RESOURCE.
1275 slack_bytes = (char *)resp->end - (char *)resp->p;
1276 if (slack_bytes < COMPOUND_SLACK_SPACE
1277 + COMPOUND_ERR_SLACK_SPACE) {
1278 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1279 op->status = nfserr_resource;
1283 opdesc = OPDESC(op);
1285 if (!cstate->current_fh.fh_dentry) {
1286 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1287 op->status = nfserr_nofilehandle;
1290 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1291 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1292 op->status = nfserr_moved;
1296 /* If op is non-idempotent */
1297 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1298 plen = opdesc->op_rsize_bop(rqstp, op);
1299 op->status = nfsd4_check_resp_size(resp, plen);
1305 if (opdesc->op_get_currentstateid)
1306 opdesc->op_get_currentstateid(cstate, &op->u);
1307 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1310 if (opdesc->op_set_currentstateid)
1311 opdesc->op_set_currentstateid(cstate, &op->u);
1313 if (opdesc->op_flags & OP_CLEAR_STATEID)
1314 clear_current_stateid(cstate);
1316 if (need_wrongsec_check(rqstp))
1317 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1321 /* Only from SEQUENCE */
1322 if (resp->cstate.status == nfserr_replay_cache) {
1323 dprintk("%s NFS4.1 replay from cache\n", __func__);
1324 status = op->status;
1327 if (op->status == nfserr_replay_me) {
1328 op->replay = &cstate->replay_owner->so_replay;
1329 nfsd4_encode_replay(resp, op);
1330 status = op->status = op->replay->rp_status;
1332 nfsd4_encode_operation(resp, op);
1333 status = op->status;
1336 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1337 args->ops, args->opcnt, resp->opcnt, op->opnum,
1338 be32_to_cpu(status));
1340 if (cstate->replay_owner) {
1341 nfs4_unlock_state();
1342 cstate->replay_owner = NULL;
1344 /* XXX Ugh, we need to get rid of this kind of special case: */
1345 if (op->opnum == OP_READ && op->u.read.rd_filp)
1346 fput(op->u.read.rd_filp);
1348 nfsd4_increment_op_stats(op->opnum);
1351 resp->cstate.status = status;
1352 fh_put(&resp->cstate.current_fh);
1353 fh_put(&resp->cstate.save_fh);
1354 BUG_ON(resp->cstate.replay_owner);
1356 /* Reset deferral mechanism for RPC deferrals */
1357 rqstp->rq_usedeferral = 1;
1358 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1362 #define op_encode_hdr_size (2)
1363 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1364 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1365 #define op_encode_change_info_maxsz (5)
1366 #define nfs4_fattr_bitmap_maxsz (4)
1368 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1369 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1371 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1373 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1374 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1375 op_encode_ace_maxsz)
1377 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1379 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1381 return (op_encode_hdr_size) * sizeof(__be32);
1384 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1386 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1389 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1391 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1394 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1396 return (op_encode_hdr_size + op_encode_change_info_maxsz
1397 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1400 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1402 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1406 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1408 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1412 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1414 return (op_encode_hdr_size + op_encode_stateid_maxsz
1415 + op_encode_change_info_maxsz + 1
1416 + nfs4_fattr_bitmap_maxsz
1417 + op_encode_delegation_maxsz) * sizeof(__be32);
1420 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1422 u32 maxcount = 0, rlen = 0;
1424 maxcount = svc_max_payload(rqstp);
1425 rlen = op->u.read.rd_length;
1427 if (rlen > maxcount)
1430 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1433 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1435 u32 rlen = op->u.readdir.rd_maxcount;
1437 if (rlen > PAGE_SIZE)
1440 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1441 * sizeof(__be32) + rlen;
1444 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1446 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1450 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1452 return (op_encode_hdr_size + op_encode_change_info_maxsz
1453 + op_encode_change_info_maxsz) * sizeof(__be32);
1456 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1458 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1461 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1463 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1466 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1468 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1471 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1473 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1474 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1475 2 + /*eir_server_owner.so_minor_id */\
1476 /* eir_server_owner.so_major_id<> */\
1477 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1478 /* eir_server_scope<> */\
1479 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1480 1 + /* eir_server_impl_id array length */\
1481 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1484 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1486 return (op_encode_hdr_size + \
1487 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1488 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1491 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1493 return (op_encode_hdr_size + \
1494 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1495 2 + /* csr_sequence, csr_flags */\
1496 op_encode_channel_attrs_maxsz + \
1497 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1500 static struct nfsd4_operation nfsd4_ops[] = {
1502 .op_func = (nfsd4op_func)nfsd4_access,
1503 .op_name = "OP_ACCESS",
1506 .op_func = (nfsd4op_func)nfsd4_close,
1507 .op_flags = OP_MODIFIES_SOMETHING,
1508 .op_name = "OP_CLOSE",
1509 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1510 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1511 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1514 .op_func = (nfsd4op_func)nfsd4_commit,
1515 .op_flags = OP_MODIFIES_SOMETHING,
1516 .op_name = "OP_COMMIT",
1517 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1520 .op_func = (nfsd4op_func)nfsd4_create,
1521 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1522 .op_name = "OP_CREATE",
1523 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1525 [OP_DELEGRETURN] = {
1526 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1527 .op_flags = OP_MODIFIES_SOMETHING,
1528 .op_name = "OP_DELEGRETURN",
1529 .op_rsize_bop = nfsd4_only_status_rsize,
1530 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1533 .op_func = (nfsd4op_func)nfsd4_getattr,
1534 .op_flags = ALLOWED_ON_ABSENT_FS,
1535 .op_name = "OP_GETATTR",
1538 .op_func = (nfsd4op_func)nfsd4_getfh,
1539 .op_name = "OP_GETFH",
1542 .op_func = (nfsd4op_func)nfsd4_link,
1543 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1545 .op_name = "OP_LINK",
1546 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1549 .op_func = (nfsd4op_func)nfsd4_lock,
1550 .op_flags = OP_MODIFIES_SOMETHING,
1551 .op_name = "OP_LOCK",
1552 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1553 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1556 .op_func = (nfsd4op_func)nfsd4_lockt,
1557 .op_name = "OP_LOCKT",
1560 .op_func = (nfsd4op_func)nfsd4_locku,
1561 .op_flags = OP_MODIFIES_SOMETHING,
1562 .op_name = "OP_LOCKU",
1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1564 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1567 .op_func = (nfsd4op_func)nfsd4_lookup,
1568 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1569 .op_name = "OP_LOOKUP",
1572 .op_func = (nfsd4op_func)nfsd4_lookupp,
1573 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1574 .op_name = "OP_LOOKUPP",
1577 .op_func = (nfsd4op_func)nfsd4_nverify,
1578 .op_name = "OP_NVERIFY",
1581 .op_func = (nfsd4op_func)nfsd4_open,
1582 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1583 .op_name = "OP_OPEN",
1584 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1585 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1587 [OP_OPEN_CONFIRM] = {
1588 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1589 .op_flags = OP_MODIFIES_SOMETHING,
1590 .op_name = "OP_OPEN_CONFIRM",
1591 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1593 [OP_OPEN_DOWNGRADE] = {
1594 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1595 .op_flags = OP_MODIFIES_SOMETHING,
1596 .op_name = "OP_OPEN_DOWNGRADE",
1597 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1598 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1599 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1602 .op_func = (nfsd4op_func)nfsd4_putfh,
1603 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1604 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1606 .op_name = "OP_PUTFH",
1607 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1610 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1611 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1612 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1614 .op_name = "OP_PUTPUBFH",
1615 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1618 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1619 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1620 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1622 .op_name = "OP_PUTROOTFH",
1623 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1626 .op_func = (nfsd4op_func)nfsd4_read,
1627 .op_flags = OP_MODIFIES_SOMETHING,
1628 .op_name = "OP_READ",
1629 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1630 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1633 .op_func = (nfsd4op_func)nfsd4_readdir,
1634 .op_flags = OP_MODIFIES_SOMETHING,
1635 .op_name = "OP_READDIR",
1636 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1639 .op_func = (nfsd4op_func)nfsd4_readlink,
1640 .op_name = "OP_READLINK",
1643 .op_func = (nfsd4op_func)nfsd4_remove,
1644 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1645 .op_name = "OP_REMOVE",
1646 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1649 .op_func = (nfsd4op_func)nfsd4_rename,
1650 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1651 .op_name = "OP_RENAME",
1652 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1655 .op_func = (nfsd4op_func)nfsd4_renew,
1656 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1657 | OP_MODIFIES_SOMETHING,
1658 .op_name = "OP_RENEW",
1659 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1663 .op_func = (nfsd4op_func)nfsd4_restorefh,
1664 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1665 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1666 .op_name = "OP_RESTOREFH",
1667 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1670 .op_func = (nfsd4op_func)nfsd4_savefh,
1671 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1672 .op_name = "OP_SAVEFH",
1673 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1676 .op_func = (nfsd4op_func)nfsd4_secinfo,
1677 .op_flags = OP_HANDLES_WRONGSEC,
1678 .op_name = "OP_SECINFO",
1681 .op_func = (nfsd4op_func)nfsd4_setattr,
1682 .op_name = "OP_SETATTR",
1683 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1684 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1685 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1687 [OP_SETCLIENTID] = {
1688 .op_func = (nfsd4op_func)nfsd4_setclientid,
1689 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1690 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1691 .op_name = "OP_SETCLIENTID",
1692 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1694 [OP_SETCLIENTID_CONFIRM] = {
1695 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1696 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1697 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1698 .op_name = "OP_SETCLIENTID_CONFIRM",
1699 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1702 .op_func = (nfsd4op_func)nfsd4_verify,
1703 .op_name = "OP_VERIFY",
1706 .op_func = (nfsd4op_func)nfsd4_write,
1707 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1708 .op_name = "OP_WRITE",
1709 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1710 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1712 [OP_RELEASE_LOCKOWNER] = {
1713 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1714 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1715 | OP_MODIFIES_SOMETHING,
1716 .op_name = "OP_RELEASE_LOCKOWNER",
1717 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1720 /* NFSv4.1 operations */
1721 [OP_EXCHANGE_ID] = {
1722 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1723 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1724 | OP_MODIFIES_SOMETHING,
1725 .op_name = "OP_EXCHANGE_ID",
1726 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1728 [OP_BACKCHANNEL_CTL] = {
1729 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1730 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1731 .op_name = "OP_BACKCHANNEL_CTL",
1732 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1734 [OP_BIND_CONN_TO_SESSION] = {
1735 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1736 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1737 | OP_MODIFIES_SOMETHING,
1738 .op_name = "OP_BIND_CONN_TO_SESSION",
1739 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1741 [OP_CREATE_SESSION] = {
1742 .op_func = (nfsd4op_func)nfsd4_create_session,
1743 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1744 | OP_MODIFIES_SOMETHING,
1745 .op_name = "OP_CREATE_SESSION",
1746 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1748 [OP_DESTROY_SESSION] = {
1749 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1750 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1751 | OP_MODIFIES_SOMETHING,
1752 .op_name = "OP_DESTROY_SESSION",
1753 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1756 .op_func = (nfsd4op_func)nfsd4_sequence,
1757 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1758 .op_name = "OP_SEQUENCE",
1760 [OP_DESTROY_CLIENTID] = {
1761 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1762 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1763 | OP_MODIFIES_SOMETHING,
1764 .op_name = "OP_DESTROY_CLIENTID",
1765 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1767 [OP_RECLAIM_COMPLETE] = {
1768 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1769 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1770 .op_name = "OP_RECLAIM_COMPLETE",
1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1773 [OP_SECINFO_NO_NAME] = {
1774 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1775 .op_flags = OP_HANDLES_WRONGSEC,
1776 .op_name = "OP_SECINFO_NO_NAME",
1778 [OP_TEST_STATEID] = {
1779 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1780 .op_flags = ALLOWED_WITHOUT_FH,
1781 .op_name = "OP_TEST_STATEID",
1783 [OP_FREE_STATEID] = {
1784 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1785 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1786 .op_name = "OP_FREE_STATEID",
1787 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1788 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1793 static const char *nfsd4_op_name(unsigned opnum)
1795 if (opnum < ARRAY_SIZE(nfsd4_ops))
1796 return nfsd4_ops[opnum].op_name;
1797 return "unknown_operation";
1801 #define nfsd4_voidres nfsd4_voidargs
1802 struct nfsd4_voidargs { int dummy; };
1804 static struct svc_procedure nfsd_procedures4[2] = {
1806 .pc_func = (svc_procfunc) nfsd4_proc_null,
1807 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1808 .pc_argsize = sizeof(struct nfsd4_voidargs),
1809 .pc_ressize = sizeof(struct nfsd4_voidres),
1810 .pc_cachetype = RC_NOCACHE,
1813 [NFSPROC4_COMPOUND] = {
1814 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1815 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1816 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1817 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1818 .pc_ressize = sizeof(struct nfsd4_compoundres),
1819 .pc_release = nfsd4_release_compoundargs,
1820 .pc_cachetype = RC_NOCACHE,
1821 .pc_xdrressize = NFSD_BUFSIZE/4,
1825 struct svc_version nfsd_version4 = {
1828 .vs_proc = nfsd_procedures4,
1829 .vs_dispatch = nfsd_dispatch,
1830 .vs_xdrsize = NFS4_SVC_XDRSIZE,