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"
46 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
47 #include <linux/security.h>
50 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
52 struct inode *inode = resfh->fh_dentry->d_inode;
55 mutex_lock(&inode->i_mutex);
56 status = security_inode_setsecctx(resfh->fh_dentry,
57 label->data, label->len);
58 mutex_unlock(&inode->i_mutex);
62 * XXX: We should really fail the whole open, but we may
63 * already have created a new file, so it may be too
64 * late. For now this seems the least of evils:
66 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
72 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
76 #define NFSDDBG_FACILITY NFSDDBG_PROC
78 static u32 nfsd_attrmask[] = {
79 NFSD_WRITEABLE_ATTRS_WORD0,
80 NFSD_WRITEABLE_ATTRS_WORD1,
81 NFSD_WRITEABLE_ATTRS_WORD2
84 static u32 nfsd41_ex_attrmask[] = {
85 NFSD_SUPPATTR_EXCLCREAT_WORD0,
86 NFSD_SUPPATTR_EXCLCREAT_WORD1,
87 NFSD_SUPPATTR_EXCLCREAT_WORD2
91 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
92 u32 *bmval, u32 *writable)
94 struct dentry *dentry = cstate->current_fh.fh_dentry;
97 * Check about attributes are supported by the NFSv4 server or not.
98 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
100 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
101 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
102 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
103 return nfserr_attrnotsupp;
106 * Check FATTR4_WORD0_ACL can be supported
107 * in current environment or not.
109 if (bmval[0] & FATTR4_WORD0_ACL) {
110 if (!IS_POSIXACL(dentry->d_inode))
111 return nfserr_attrnotsupp;
115 * According to spec, read-only attributes return ERR_INVAL.
118 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
119 (bmval[2] & ~writable[2]))
127 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
128 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
130 __be32 status = nfs_ok;
132 if (open->op_create == NFS4_OPEN_CREATE) {
133 if (open->op_createmode == NFS4_CREATE_UNCHECKED
134 || open->op_createmode == NFS4_CREATE_GUARDED)
135 status = check_attr_support(rqstp, cstate,
136 open->op_bmval, nfsd_attrmask);
137 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
138 status = check_attr_support(rqstp, cstate,
139 open->op_bmval, nfsd41_ex_attrmask);
146 is_create_with_attrs(struct nfsd4_open *open)
148 return open->op_create == NFS4_OPEN_CREATE
149 && (open->op_createmode == NFS4_CREATE_UNCHECKED
150 || open->op_createmode == NFS4_CREATE_GUARDED
151 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
155 * if error occurs when setting the acl, just clear the acl bit
156 * in the returned attr bitmap.
159 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
160 struct nfs4_acl *acl, u32 *bmval)
164 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
167 * We should probably fail the whole open at this point,
168 * but we've already created the file, so it's too late;
169 * So this seems the least of evils:
171 bmval[0] &= ~FATTR4_WORD0_ACL;
175 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
178 dget(src->fh_dentry);
180 cache_get(&src->fh_export->h);
185 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
189 if (open->op_truncate &&
190 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
193 accmode |= NFSD_MAY_READ_IF_EXEC;
195 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
196 accmode |= NFSD_MAY_READ;
197 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
198 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
199 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
200 accmode |= NFSD_MAY_WRITE;
202 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
207 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
209 umode_t mode = fh->fh_dentry->d_inode->i_mode;
216 * Using err_symlink as our catch-all case may look odd; but
217 * there's no other obvious error for this case in 4.0, and we
218 * happen to know that it will cause the linux v4 client to do
219 * the right thing on attempts to open something other than a
222 return nfserr_symlink;
225 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
227 if (nfsd4_has_session(cstate))
229 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
234 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
236 struct svc_fh *current_fh = &cstate->current_fh;
237 struct svc_fh *resfh;
241 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
243 return nfserr_jukebox;
244 fh_init(resfh, NFS4_FHSIZE);
245 open->op_truncate = 0;
247 if (open->op_create) {
248 /* FIXME: check session persistence and pnfs flags.
249 * The nfsv4.1 spec requires the following semantics:
251 * Persistent | pNFS | Server REQUIRED | Client Allowed
252 * Reply Cache | server | |
253 * -------------+--------+-----------------+--------------------
254 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
256 * | | and EXCLUSIVE4 | or EXCLUSIVE4
258 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
259 * yes | no | GUARDED4 | GUARDED4
260 * yes | yes | GUARDED4 | GUARDED4
264 * Note: create modes (UNCHECKED,GUARDED...) are the same
265 * in NFSv4 as in v3 except EXCLUSIVE4_1.
267 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
268 open->op_fname.len, &open->op_iattr,
269 resfh, open->op_createmode,
270 (u32 *)open->op_verf.data,
271 &open->op_truncate, &open->op_created);
273 if (!status && open->op_label.len)
274 nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval);
277 * Following rfc 3530 14.2.16, use the returned bitmask
278 * to indicate which attributes we used to store the
281 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
282 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
283 FATTR4_WORD1_TIME_MODIFY);
285 status = nfsd_lookup(rqstp, current_fh,
286 open->op_fname.data, open->op_fname.len, resfh);
287 fh_unlock(current_fh);
291 status = nfsd_check_obj_isreg(resfh);
295 if (is_create_with_attrs(open) && open->op_acl != NULL)
296 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
298 nfsd4_set_open_owner_reply_cache(cstate, open, resfh);
299 accmode = NFSD_MAY_NOP;
300 if (open->op_created ||
301 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
302 accmode |= NFSD_MAY_OWNER_OVERRIDE;
303 status = do_open_permission(rqstp, resfh, open, accmode);
304 set_change_info(&open->op_cinfo, current_fh);
305 fh_dup2(current_fh, resfh);
313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
315 struct svc_fh *current_fh = &cstate->current_fh;
319 /* We don't know the target directory, and therefore can not
320 * set the change info
323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
328 (open->op_iattr.ia_size == 0);
330 * In the delegation case, the client is telling us about an
331 * open that it *already* performed locally, some time ago. We
332 * should let it succeed now if possible.
334 * In the case of a CLAIM_FH open, on the other hand, the client
335 * may be counting on us to enforce permissions (the Linux 4.1
336 * client uses this for normal opens, for example).
338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
339 accmode = NFSD_MAY_OWNER_OVERRIDE;
341 status = do_open_permission(rqstp, current_fh, open, accmode);
347 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
349 struct nfsd4_sessionid *sid =
350 (struct nfsd4_sessionid *)session->se_sessionid.data;
352 clid->cl_boot = sid->clientid.cl_boot;
353 clid->cl_id = sid->clientid.cl_id;
357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
358 struct nfsd4_open *open)
361 struct nfsd4_compoundres *resp;
362 struct net *net = SVC_NET(rqstp);
363 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
365 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
366 (int)open->op_fname.len, open->op_fname.data,
369 /* This check required by spec. */
370 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
373 open->op_created = 0;
376 * Before RECLAIM_COMPLETE done, server should deny new lock
378 if (nfsd4_has_session(cstate) &&
379 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
380 &cstate->session->se_client->cl_flags) &&
381 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
384 if (nfsd4_has_session(cstate))
385 copy_clientid(&open->op_clientid, cstate->session);
389 /* check seqid for replay. set nfs4_owner */
390 resp = rqstp->rq_resp;
391 status = nfsd4_process_open1(&resp->cstate, open, nn);
392 if (status == nfserr_replay_me) {
393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
394 fh_put(&cstate->current_fh);
395 fh_copy_shallow(&cstate->current_fh.fh_handle,
397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
399 dprintk("nfsd4_open: replay failed"
400 " restoring previous filehandle\n");
402 status = nfserr_replay_me;
406 if (open->op_xdr_error) {
407 status = open->op_xdr_error;
411 status = nfsd4_check_open_attributes(rqstp, cstate, open);
415 /* Openowner is now set, so sequence id will get bumped. Now we need
416 * these checks before we do any creates: */
417 status = nfserr_grace;
418 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
420 status = nfserr_no_grace;
421 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
424 switch (open->op_claim_type) {
425 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
426 case NFS4_OPEN_CLAIM_NULL:
427 status = do_open_lookup(rqstp, cstate, open);
431 case NFS4_OPEN_CLAIM_PREVIOUS:
432 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
433 status = nfs4_check_open_reclaim(&open->op_clientid,
434 cstate->minorversion,
438 case NFS4_OPEN_CLAIM_FH:
439 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
440 status = do_open_fhandle(rqstp, cstate, open);
444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
445 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
446 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
447 dprintk("NFSD: unsupported OPEN claim type %d\n",
448 open->op_claim_type);
449 status = nfserr_notsupp;
452 dprintk("NFSD: Invalid OPEN claim type %d\n",
453 open->op_claim_type);
454 status = nfserr_inval;
458 * nfsd4_process_open2() does the actual opening of the file. If
459 * successful, it (1) truncates the file if open->op_truncate was
460 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
462 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
463 WARN_ON(status && open->op_created);
465 nfsd4_cleanup_open_state(open, status);
466 if (open->op_openowner && !nfsd4_has_session(cstate))
467 cstate->replay_owner = &open->op_openowner->oo_owner;
468 nfsd4_bump_seqid(cstate, status);
469 if (!cstate->replay_owner)
475 * OPEN is the only seqid-mutating operation whose decoding can fail
476 * with a seqid-mutating error (specifically, decoding of user names in
477 * the attributes). Therefore we have to do some processing to look up
478 * the stateowner so that we can bump the seqid.
480 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
482 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
484 if (!seqid_mutating_err(ntohl(op->status)))
486 if (nfsd4_has_session(cstate))
488 open->op_xdr_error = op->status;
489 return nfsd4_open(rqstp, cstate, open);
493 * filehandle-manipulating ops.
496 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
497 struct svc_fh **getfh)
499 if (!cstate->current_fh.fh_dentry)
500 return nfserr_nofilehandle;
502 *getfh = &cstate->current_fh;
507 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
508 struct nfsd4_putfh *putfh)
510 fh_put(&cstate->current_fh);
511 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
512 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
514 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
518 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
523 fh_put(&cstate->current_fh);
524 status = exp_pseudoroot(rqstp, &cstate->current_fh);
529 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
532 if (!cstate->save_fh.fh_dentry)
533 return nfserr_restorefh;
535 fh_dup2(&cstate->current_fh, &cstate->save_fh);
536 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
537 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
538 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
544 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 if (!cstate->current_fh.fh_dentry)
548 return nfserr_nofilehandle;
550 fh_dup2(&cstate->save_fh, &cstate->current_fh);
551 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
552 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
553 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
562 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
563 struct nfsd4_access *access)
565 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
568 access->ac_resp_access = access->ac_req_access;
569 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
570 &access->ac_supported);
573 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
576 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
578 verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
579 verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
580 memcpy(verifier->data, verf, sizeof(verifier->data));
584 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
585 struct nfsd4_commit *commit)
587 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
588 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
593 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
594 struct nfsd4_create *create)
600 fh_init(&resfh, NFS4_FHSIZE);
602 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
607 status = check_attr_support(rqstp, cstate, create->cr_bmval,
612 switch (create->cr_type) {
614 /* ugh! we have to null-terminate the linktext, or
615 * vfs_symlink() will choke. it is always safe to
616 * null-terminate by brute force, since at worst we
617 * will overwrite the first byte of the create namelen
618 * in the XDR buffer, which has already been extracted
621 create->cr_linkname[create->cr_linklen] = 0;
623 status = nfsd_symlink(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 create->cr_linkname, create->cr_linklen,
626 &resfh, &create->cr_iattr);
630 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
631 if (MAJOR(rdev) != create->cr_specdata1 ||
632 MINOR(rdev) != create->cr_specdata2)
634 status = nfsd_create(rqstp, &cstate->current_fh,
635 create->cr_name, create->cr_namelen,
636 &create->cr_iattr, S_IFBLK, rdev, &resfh);
640 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
641 if (MAJOR(rdev) != create->cr_specdata1 ||
642 MINOR(rdev) != create->cr_specdata2)
644 status = nfsd_create(rqstp, &cstate->current_fh,
645 create->cr_name, create->cr_namelen,
646 &create->cr_iattr,S_IFCHR, rdev, &resfh);
650 status = nfsd_create(rqstp, &cstate->current_fh,
651 create->cr_name, create->cr_namelen,
652 &create->cr_iattr, S_IFSOCK, 0, &resfh);
656 status = nfsd_create(rqstp, &cstate->current_fh,
657 create->cr_name, create->cr_namelen,
658 &create->cr_iattr, S_IFIFO, 0, &resfh);
662 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
663 status = nfsd_create(rqstp, &cstate->current_fh,
664 create->cr_name, create->cr_namelen,
665 &create->cr_iattr, S_IFDIR, 0, &resfh);
669 status = nfserr_badtype;
675 if (create->cr_label.len)
676 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
678 if (create->cr_acl != NULL)
679 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
682 fh_unlock(&cstate->current_fh);
683 set_change_info(&create->cr_cinfo, &cstate->current_fh);
684 fh_dup2(&cstate->current_fh, &resfh);
691 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
692 struct nfsd4_getattr *getattr)
696 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
700 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
703 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
704 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
705 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
707 getattr->ga_fhp = &cstate->current_fh;
712 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
713 struct nfsd4_link *link)
715 __be32 status = nfserr_nofilehandle;
717 if (!cstate->save_fh.fh_dentry)
719 status = nfsd_link(rqstp, &cstate->current_fh,
720 link->li_name, link->li_namelen, &cstate->save_fh);
722 set_change_info(&link->li_cinfo, &cstate->current_fh);
726 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
728 struct svc_fh tmp_fh;
731 fh_init(&tmp_fh, NFS4_FHSIZE);
732 ret = exp_pseudoroot(rqstp, &tmp_fh);
735 if (tmp_fh.fh_dentry == fh->fh_dentry) {
740 return nfsd_lookup(rqstp, fh, "..", 2, fh);
744 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
747 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
751 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
752 struct nfsd4_lookup *lookup)
754 return nfsd_lookup(rqstp, &cstate->current_fh,
755 lookup->lo_name, lookup->lo_len,
756 &cstate->current_fh);
760 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
761 struct nfsd4_read *read)
765 /* no need to check permission - this will be done in nfsd_read() */
767 read->rd_filp = NULL;
768 if (read->rd_offset >= OFFSET_MAX)
772 * If we do a zero copy read, then a client will see read data
773 * that reflects the state of the file *after* performing the
774 * following compound.
776 * To ensure proper ordering, we therefore turn off zero copy if
777 * the client wants us to do more in this compound:
779 if (!nfsd4_last_compound_op(rqstp))
780 rqstp->rq_splice_ok = false;
784 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
785 cstate, &read->rd_stateid,
786 RD_STATE, &read->rd_filp))) {
787 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
791 get_file(read->rd_filp);
795 read->rd_rqstp = rqstp;
796 read->rd_fhp = &cstate->current_fh;
801 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
802 struct nfsd4_readdir *readdir)
804 u64 cookie = readdir->rd_cookie;
805 static const nfs4_verifier zeroverf;
807 /* no need to check permission - this will be done in nfsd_readdir() */
809 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
812 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
813 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
814 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
816 if ((cookie == 1) || (cookie == 2) ||
817 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
818 return nfserr_bad_cookie;
820 readdir->rd_rqstp = rqstp;
821 readdir->rd_fhp = &cstate->current_fh;
826 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
827 struct nfsd4_readlink *readlink)
829 readlink->rl_rqstp = rqstp;
830 readlink->rl_fhp = &cstate->current_fh;
835 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
836 struct nfsd4_remove *remove)
840 if (locks_in_grace(SVC_NET(rqstp)))
842 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
843 remove->rm_name, remove->rm_namelen);
845 fh_unlock(&cstate->current_fh);
846 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
852 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
853 struct nfsd4_rename *rename)
855 __be32 status = nfserr_nofilehandle;
857 if (!cstate->save_fh.fh_dentry)
859 if (locks_in_grace(SVC_NET(rqstp)) &&
860 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
862 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
863 rename->rn_snamelen, &cstate->current_fh,
864 rename->rn_tname, rename->rn_tnamelen);
867 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
868 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
873 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
874 struct nfsd4_secinfo *secinfo)
877 struct svc_export *exp;
878 struct dentry *dentry;
881 fh_init(&resfh, NFS4_FHSIZE);
882 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
885 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
886 secinfo->si_name, secinfo->si_namelen,
890 if (dentry->d_inode == NULL) {
894 secinfo->si_exp = exp;
896 if (cstate->minorversion)
897 /* See rfc 5661 section 2.6.3.1.1.8 */
898 fh_put(&cstate->current_fh);
903 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
904 struct nfsd4_secinfo_no_name *sin)
908 switch (sin->sin_style) {
909 case NFS4_SECINFO_STYLE4_CURRENT_FH:
911 case NFS4_SECINFO_STYLE4_PARENT:
912 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
919 exp_get(cstate->current_fh.fh_export);
920 sin->sin_exp = cstate->current_fh.fh_export;
921 fh_put(&cstate->current_fh);
926 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
927 struct nfsd4_setattr *setattr)
929 __be32 status = nfs_ok;
932 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
934 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
935 &setattr->sa_stateid, WR_STATE, NULL);
938 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
942 err = fh_want_write(&cstate->current_fh);
944 return nfserrno(err);
947 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
952 if (setattr->sa_acl != NULL)
953 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
957 if (setattr->sa_label.len)
958 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
962 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
965 fh_drop_write(&cstate->current_fh);
969 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
972 int buflen = write->wr_buflen;
974 vec[0].iov_base = write->wr_head.iov_base;
975 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
976 buflen -= vec[0].iov_len;
979 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
980 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
981 buflen -= vec[i].iov_len;
988 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
989 struct nfsd4_write *write)
991 stateid_t *stateid = &write->wr_stateid;
992 struct file *filp = NULL;
993 __be32 status = nfs_ok;
997 /* no need to check permission - this will be done in nfsd_write() */
999 if (write->wr_offset >= OFFSET_MAX)
1000 return nfserr_inval;
1003 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
1004 cstate, stateid, WR_STATE, &filp);
1006 nfs4_unlock_state();
1007 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1012 nfs4_unlock_state();
1014 cnt = write->wr_buflen;
1015 write->wr_how_written = write->wr_stable_how;
1016 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1018 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1019 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1021 status = nfsd_write(rqstp, &cstate->current_fh, filp,
1022 write->wr_offset, rqstp->rq_vec, nvecs,
1023 &cnt, &write->wr_how_written);
1027 write->wr_bytes_written = cnt;
1032 /* This routine never returns NFS_OK! If there are no other errors, it
1033 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1034 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1035 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1038 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1039 struct nfsd4_verify *verify)
1045 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1049 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1053 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1054 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1055 return nfserr_inval;
1056 if (verify->ve_attrlen & 3)
1057 return nfserr_inval;
1060 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1062 count = 4 + (verify->ve_attrlen >> 2);
1063 buf = kmalloc(count << 2, GFP_KERNEL);
1065 return nfserr_jukebox;
1068 status = nfsd4_encode_fattr(&cstate->current_fh,
1069 cstate->current_fh.fh_export,
1070 cstate->current_fh.fh_dentry, &p,
1071 count, verify->ve_bmval,
1074 /* this means that nfsd4_encode_fattr() ran out of space */
1075 if (status == nfserr_resource)
1076 status = nfserr_not_same;
1081 p = buf + 1 + ntohl(buf[0]);
1082 status = nfserr_not_same;
1083 if (ntohl(*p++) != verify->ve_attrlen)
1085 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1086 status = nfserr_same;
1094 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1095 struct nfsd4_verify *verify)
1099 status = _nfsd4_verify(rqstp, cstate, verify);
1100 return status == nfserr_not_same ? nfs_ok : status;
1104 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1105 struct nfsd4_verify *verify)
1109 status = _nfsd4_verify(rqstp, cstate, verify);
1110 return status == nfserr_same ? nfs_ok : status;
1117 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1122 static inline void nfsd4_increment_op_stats(u32 opnum)
1124 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1125 nfsdstats.nfs4_opcount[opnum]++;
1128 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1130 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1131 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1132 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1134 enum nfsd4_op_flags {
1135 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1136 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1137 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1138 /* For rfc 5661 section 2.6.3.1.1: */
1139 OP_HANDLES_WRONGSEC = 1 << 3,
1140 OP_IS_PUTFH_LIKE = 1 << 4,
1142 * These are the ops whose result size we estimate before
1143 * encoding, to avoid performing an op then not being able to
1144 * respond or cache a response. This includes writes and setattrs
1145 * as well as the operations usually called "nonidempotent":
1147 OP_MODIFIES_SOMETHING = 1 << 5,
1149 * Cache compounds containing these ops in the xid-based drc:
1150 * We use the DRC for compounds containing non-idempotent
1151 * operations, *except* those that are 4.1-specific (since
1152 * sessions provide their own EOS), and except for stateful
1153 * operations other than setclientid and setclientid_confirm
1154 * (since sequence numbers provide EOS for open, lock, etc in
1157 OP_CACHEME = 1 << 6,
1159 * These are ops which clear current state id.
1161 OP_CLEAR_STATEID = 1 << 7,
1164 struct nfsd4_operation {
1165 nfsd4op_func op_func;
1168 /* Try to get response size before operation */
1169 nfsd4op_rsize op_rsize_bop;
1170 stateid_getter op_get_currentstateid;
1171 stateid_setter op_set_currentstateid;
1174 static struct nfsd4_operation nfsd4_ops[];
1177 static const char *nfsd4_op_name(unsigned opnum);
1181 * Enforce NFSv4.1 COMPOUND ordering rules:
1183 * Also note, enforced elsewhere:
1184 * - SEQUENCE other than as first op results in
1185 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1186 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1187 * (Enforced in nfsd4_bind_conn_to_session().)
1188 * - DESTROY_SESSION must be the final operation in a compound, if
1189 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1190 * (Enforced in nfsd4_destroy_session().)
1192 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1194 struct nfsd4_op *op = &args->ops[0];
1196 /* These ordering requirements don't apply to NFSv4.0: */
1197 if (args->minorversion == 0)
1199 /* This is weird, but OK, not our problem: */
1200 if (args->opcnt == 0)
1202 if (op->status == nfserr_op_illegal)
1204 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1205 return nfserr_op_not_in_session;
1206 if (op->opnum == OP_SEQUENCE)
1208 if (args->opcnt != 1)
1209 return nfserr_not_only_op;
1213 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1215 return &nfsd4_ops[op->opnum];
1218 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1220 return OPDESC(op)->op_flags & OP_CACHEME;
1223 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1225 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1226 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1227 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1228 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1229 struct nfsd4_operation *thisd;
1230 struct nfsd4_operation *nextd;
1232 thisd = OPDESC(this);
1234 * Most ops check wronsec on our own; only the putfh-like ops
1235 * have special rules.
1237 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1240 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1241 * put-filehandle operation if we're not going to use the
1244 if (argp->opcnt == resp->opcnt)
1247 nextd = OPDESC(next);
1249 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1250 * errors themselves as necessary; others should check for them
1253 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1260 nfsd4_proc_compound(struct svc_rqst *rqstp,
1261 struct nfsd4_compoundargs *args,
1262 struct nfsd4_compoundres *resp)
1264 struct nfsd4_op *op;
1265 struct nfsd4_operation *opdesc;
1266 struct nfsd4_compound_state *cstate = &resp->cstate;
1271 resp->xbuf = &rqstp->rq_res;
1272 resp->p = rqstp->rq_res.head[0].iov_base +
1273 rqstp->rq_res.head[0].iov_len;
1274 resp->tagp = resp->p;
1275 /* reserve space for: taglen, tag, and opcnt */
1276 resp->p += 2 + XDR_QUADLEN(args->taglen);
1277 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1278 resp->taglen = args->taglen;
1279 resp->tag = args->tag;
1281 resp->rqstp = rqstp;
1282 resp->cstate.minorversion = args->minorversion;
1283 resp->cstate.replay_owner = NULL;
1284 resp->cstate.session = NULL;
1285 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1286 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1288 * Don't use the deferral mechanism for NFSv4; compounds make it
1289 * too hard to avoid non-idempotency problems.
1291 rqstp->rq_usedeferral = 0;
1294 * According to RFC3010, this takes precedence over all other errors.
1296 status = nfserr_minor_vers_mismatch;
1297 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1300 status = nfs41_check_op_ordering(args);
1303 op->status = status;
1307 while (!status && resp->opcnt < args->opcnt) {
1308 op = &args->ops[resp->opcnt++];
1310 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1311 resp->opcnt, args->opcnt, op->opnum,
1312 nfsd4_op_name(op->opnum));
1314 * The XDR decode routines may have pre-set op->status;
1315 * for example, if there is a miscellaneous XDR error
1316 * it will be set to nfserr_bad_xdr.
1319 if (op->opnum == OP_OPEN)
1320 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1324 /* We must be able to encode a successful response to
1325 * this operation, with enough room left over to encode a
1326 * failed response to the next operation. If we don't
1327 * have enough room, fail with ERR_RESOURCE.
1329 slack_bytes = (char *)resp->end - (char *)resp->p;
1330 if (slack_bytes < COMPOUND_SLACK_SPACE
1331 + COMPOUND_ERR_SLACK_SPACE) {
1332 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1333 op->status = nfserr_resource;
1337 opdesc = OPDESC(op);
1339 if (!cstate->current_fh.fh_dentry) {
1340 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1341 op->status = nfserr_nofilehandle;
1344 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1345 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1346 op->status = nfserr_moved;
1350 /* If op is non-idempotent */
1351 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1352 plen = opdesc->op_rsize_bop(rqstp, op);
1353 op->status = nfsd4_check_resp_size(resp, plen);
1359 if (opdesc->op_get_currentstateid)
1360 opdesc->op_get_currentstateid(cstate, &op->u);
1361 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1364 if (opdesc->op_set_currentstateid)
1365 opdesc->op_set_currentstateid(cstate, &op->u);
1367 if (opdesc->op_flags & OP_CLEAR_STATEID)
1368 clear_current_stateid(cstate);
1370 if (need_wrongsec_check(rqstp))
1371 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1375 /* Only from SEQUENCE */
1376 if (resp->cstate.status == nfserr_replay_cache) {
1377 dprintk("%s NFS4.1 replay from cache\n", __func__);
1378 status = op->status;
1381 if (op->status == nfserr_replay_me) {
1382 op->replay = &cstate->replay_owner->so_replay;
1383 nfsd4_encode_replay(resp, op);
1384 status = op->status = op->replay->rp_status;
1386 nfsd4_encode_operation(resp, op);
1387 status = op->status;
1390 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1391 args->ops, args->opcnt, resp->opcnt, op->opnum,
1392 be32_to_cpu(status));
1394 if (cstate->replay_owner) {
1395 nfs4_unlock_state();
1396 cstate->replay_owner = NULL;
1398 /* XXX Ugh, we need to get rid of this kind of special case: */
1399 if (op->opnum == OP_READ && op->u.read.rd_filp)
1400 fput(op->u.read.rd_filp);
1402 nfsd4_increment_op_stats(op->opnum);
1405 resp->cstate.status = status;
1406 fh_put(&resp->cstate.current_fh);
1407 fh_put(&resp->cstate.save_fh);
1408 BUG_ON(resp->cstate.replay_owner);
1410 /* Reset deferral mechanism for RPC deferrals */
1411 rqstp->rq_usedeferral = 1;
1412 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1416 #define op_encode_hdr_size (2)
1417 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1418 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1419 #define op_encode_change_info_maxsz (5)
1420 #define nfs4_fattr_bitmap_maxsz (4)
1422 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1423 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1425 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1427 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1428 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1429 op_encode_ace_maxsz)
1431 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1433 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1435 return (op_encode_hdr_size) * sizeof(__be32);
1438 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1440 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1443 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1445 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1448 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1450 return (op_encode_hdr_size + op_encode_change_info_maxsz
1451 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1454 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1456 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1460 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1462 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1466 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1468 return (op_encode_hdr_size + op_encode_stateid_maxsz
1469 + op_encode_change_info_maxsz + 1
1470 + nfs4_fattr_bitmap_maxsz
1471 + op_encode_delegation_maxsz) * sizeof(__be32);
1474 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1476 u32 maxcount = 0, rlen = 0;
1478 maxcount = svc_max_payload(rqstp);
1479 rlen = op->u.read.rd_length;
1481 if (rlen > maxcount)
1484 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1487 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1489 u32 rlen = op->u.readdir.rd_maxcount;
1491 if (rlen > PAGE_SIZE)
1494 return (op_encode_hdr_size + op_encode_verifier_maxsz)
1495 * sizeof(__be32) + rlen;
1498 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1500 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1504 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1506 return (op_encode_hdr_size + op_encode_change_info_maxsz
1507 + op_encode_change_info_maxsz) * sizeof(__be32);
1510 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1512 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1515 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1517 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1520 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1522 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1525 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1527 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1528 1 + 1 + 2 + /* eir_flags, spr_how, spo_must_enforce & _allow */\
1529 2 + /*eir_server_owner.so_minor_id */\
1530 /* eir_server_owner.so_major_id<> */\
1531 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1532 /* eir_server_scope<> */\
1533 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1534 1 + /* eir_server_impl_id array length */\
1535 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1538 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1540 return (op_encode_hdr_size + \
1541 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1542 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1545 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1547 return (op_encode_hdr_size + \
1548 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1549 2 + /* csr_sequence, csr_flags */\
1550 op_encode_channel_attrs_maxsz + \
1551 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1554 static struct nfsd4_operation nfsd4_ops[] = {
1556 .op_func = (nfsd4op_func)nfsd4_access,
1557 .op_name = "OP_ACCESS",
1560 .op_func = (nfsd4op_func)nfsd4_close,
1561 .op_flags = OP_MODIFIES_SOMETHING,
1562 .op_name = "OP_CLOSE",
1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1564 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1565 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1568 .op_func = (nfsd4op_func)nfsd4_commit,
1569 .op_flags = OP_MODIFIES_SOMETHING,
1570 .op_name = "OP_COMMIT",
1571 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1574 .op_func = (nfsd4op_func)nfsd4_create,
1575 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1576 .op_name = "OP_CREATE",
1577 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1579 [OP_DELEGRETURN] = {
1580 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1581 .op_flags = OP_MODIFIES_SOMETHING,
1582 .op_name = "OP_DELEGRETURN",
1583 .op_rsize_bop = nfsd4_only_status_rsize,
1584 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1587 .op_func = (nfsd4op_func)nfsd4_getattr,
1588 .op_flags = ALLOWED_ON_ABSENT_FS,
1589 .op_name = "OP_GETATTR",
1592 .op_func = (nfsd4op_func)nfsd4_getfh,
1593 .op_name = "OP_GETFH",
1596 .op_func = (nfsd4op_func)nfsd4_link,
1597 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1599 .op_name = "OP_LINK",
1600 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1603 .op_func = (nfsd4op_func)nfsd4_lock,
1604 .op_flags = OP_MODIFIES_SOMETHING,
1605 .op_name = "OP_LOCK",
1606 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1607 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1610 .op_func = (nfsd4op_func)nfsd4_lockt,
1611 .op_name = "OP_LOCKT",
1614 .op_func = (nfsd4op_func)nfsd4_locku,
1615 .op_flags = OP_MODIFIES_SOMETHING,
1616 .op_name = "OP_LOCKU",
1617 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1618 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1621 .op_func = (nfsd4op_func)nfsd4_lookup,
1622 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1623 .op_name = "OP_LOOKUP",
1626 .op_func = (nfsd4op_func)nfsd4_lookupp,
1627 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1628 .op_name = "OP_LOOKUPP",
1631 .op_func = (nfsd4op_func)nfsd4_nverify,
1632 .op_name = "OP_NVERIFY",
1635 .op_func = (nfsd4op_func)nfsd4_open,
1636 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1637 .op_name = "OP_OPEN",
1638 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1639 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1641 [OP_OPEN_CONFIRM] = {
1642 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1643 .op_flags = OP_MODIFIES_SOMETHING,
1644 .op_name = "OP_OPEN_CONFIRM",
1645 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1647 [OP_OPEN_DOWNGRADE] = {
1648 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1649 .op_flags = OP_MODIFIES_SOMETHING,
1650 .op_name = "OP_OPEN_DOWNGRADE",
1651 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1652 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1653 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1656 .op_func = (nfsd4op_func)nfsd4_putfh,
1657 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1658 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1660 .op_name = "OP_PUTFH",
1661 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1664 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1665 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1666 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1668 .op_name = "OP_PUTPUBFH",
1669 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1672 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1673 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1674 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1676 .op_name = "OP_PUTROOTFH",
1677 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1680 .op_func = (nfsd4op_func)nfsd4_read,
1681 .op_flags = OP_MODIFIES_SOMETHING,
1682 .op_name = "OP_READ",
1683 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1684 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1687 .op_func = (nfsd4op_func)nfsd4_readdir,
1688 .op_flags = OP_MODIFIES_SOMETHING,
1689 .op_name = "OP_READDIR",
1690 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1693 .op_func = (nfsd4op_func)nfsd4_readlink,
1694 .op_name = "OP_READLINK",
1697 .op_func = (nfsd4op_func)nfsd4_remove,
1698 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1699 .op_name = "OP_REMOVE",
1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1703 .op_func = (nfsd4op_func)nfsd4_rename,
1704 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1705 .op_name = "OP_RENAME",
1706 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1709 .op_func = (nfsd4op_func)nfsd4_renew,
1710 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1711 | OP_MODIFIES_SOMETHING,
1712 .op_name = "OP_RENEW",
1713 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1717 .op_func = (nfsd4op_func)nfsd4_restorefh,
1718 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1719 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1720 .op_name = "OP_RESTOREFH",
1721 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1724 .op_func = (nfsd4op_func)nfsd4_savefh,
1725 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1726 .op_name = "OP_SAVEFH",
1727 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1730 .op_func = (nfsd4op_func)nfsd4_secinfo,
1731 .op_flags = OP_HANDLES_WRONGSEC,
1732 .op_name = "OP_SECINFO",
1735 .op_func = (nfsd4op_func)nfsd4_setattr,
1736 .op_name = "OP_SETATTR",
1737 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1738 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1739 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1741 [OP_SETCLIENTID] = {
1742 .op_func = (nfsd4op_func)nfsd4_setclientid,
1743 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1744 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1745 .op_name = "OP_SETCLIENTID",
1746 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1748 [OP_SETCLIENTID_CONFIRM] = {
1749 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1750 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1751 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1752 .op_name = "OP_SETCLIENTID_CONFIRM",
1753 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1756 .op_func = (nfsd4op_func)nfsd4_verify,
1757 .op_name = "OP_VERIFY",
1760 .op_func = (nfsd4op_func)nfsd4_write,
1761 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1762 .op_name = "OP_WRITE",
1763 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1764 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1766 [OP_RELEASE_LOCKOWNER] = {
1767 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1768 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1769 | OP_MODIFIES_SOMETHING,
1770 .op_name = "OP_RELEASE_LOCKOWNER",
1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1774 /* NFSv4.1 operations */
1775 [OP_EXCHANGE_ID] = {
1776 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1777 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1778 | OP_MODIFIES_SOMETHING,
1779 .op_name = "OP_EXCHANGE_ID",
1780 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1782 [OP_BACKCHANNEL_CTL] = {
1783 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1784 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1785 .op_name = "OP_BACKCHANNEL_CTL",
1786 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1788 [OP_BIND_CONN_TO_SESSION] = {
1789 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1790 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1791 | OP_MODIFIES_SOMETHING,
1792 .op_name = "OP_BIND_CONN_TO_SESSION",
1793 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1795 [OP_CREATE_SESSION] = {
1796 .op_func = (nfsd4op_func)nfsd4_create_session,
1797 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1798 | OP_MODIFIES_SOMETHING,
1799 .op_name = "OP_CREATE_SESSION",
1800 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1802 [OP_DESTROY_SESSION] = {
1803 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1804 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1805 | OP_MODIFIES_SOMETHING,
1806 .op_name = "OP_DESTROY_SESSION",
1807 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1810 .op_func = (nfsd4op_func)nfsd4_sequence,
1811 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1812 .op_name = "OP_SEQUENCE",
1814 [OP_DESTROY_CLIENTID] = {
1815 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1816 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1817 | OP_MODIFIES_SOMETHING,
1818 .op_name = "OP_DESTROY_CLIENTID",
1819 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1821 [OP_RECLAIM_COMPLETE] = {
1822 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1823 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1824 .op_name = "OP_RECLAIM_COMPLETE",
1825 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1827 [OP_SECINFO_NO_NAME] = {
1828 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1829 .op_flags = OP_HANDLES_WRONGSEC,
1830 .op_name = "OP_SECINFO_NO_NAME",
1832 [OP_TEST_STATEID] = {
1833 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1834 .op_flags = ALLOWED_WITHOUT_FH,
1835 .op_name = "OP_TEST_STATEID",
1837 [OP_FREE_STATEID] = {
1838 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1839 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1840 .op_name = "OP_FREE_STATEID",
1841 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1842 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1847 static const char *nfsd4_op_name(unsigned opnum)
1849 if (opnum < ARRAY_SIZE(nfsd4_ops))
1850 return nfsd4_ops[opnum].op_name;
1851 return "unknown_operation";
1855 #define nfsd4_voidres nfsd4_voidargs
1856 struct nfsd4_voidargs { int dummy; };
1858 static struct svc_procedure nfsd_procedures4[2] = {
1860 .pc_func = (svc_procfunc) nfsd4_proc_null,
1861 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1862 .pc_argsize = sizeof(struct nfsd4_voidargs),
1863 .pc_ressize = sizeof(struct nfsd4_voidres),
1864 .pc_cachetype = RC_NOCACHE,
1867 [NFSPROC4_COMPOUND] = {
1868 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1869 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1870 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1871 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1872 .pc_ressize = sizeof(struct nfsd4_compoundres),
1873 .pc_release = nfsd4_release_compoundargs,
1874 .pc_cachetype = RC_NOCACHE,
1875 .pc_xdrressize = NFSD_BUFSIZE/4,
1879 struct svc_version nfsd_version4 = {
1882 .vs_proc = nfsd_procedures4,
1883 .vs_dispatch = nfsd_dispatch,
1884 .vs_xdrsize = NFS4_SVC_XDRSIZE,