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/fs_struct.h>
36 #include <linux/file.h>
37 #include <linux/falloc.h>
38 #include <linux/slab.h>
44 #include "current_stateid.h"
50 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
51 #include <linux/security.h>
54 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
56 struct inode *inode = d_inode(resfh->fh_dentry);
60 status = security_inode_setsecctx(resfh->fh_dentry,
61 label->data, label->len);
66 * XXX: We should really fail the whole open, but we may
67 * already have created a new file, so it may be too
68 * late. For now this seems the least of evils:
70 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
76 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
80 #define NFSDDBG_FACILITY NFSDDBG_PROC
82 static u32 nfsd_attrmask[] = {
83 NFSD_WRITEABLE_ATTRS_WORD0,
84 NFSD_WRITEABLE_ATTRS_WORD1,
85 NFSD_WRITEABLE_ATTRS_WORD2
88 static u32 nfsd41_ex_attrmask[] = {
89 NFSD_SUPPATTR_EXCLCREAT_WORD0,
90 NFSD_SUPPATTR_EXCLCREAT_WORD1,
91 NFSD_SUPPATTR_EXCLCREAT_WORD2
95 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
96 u32 *bmval, u32 *writable)
98 struct dentry *dentry = cstate->current_fh.fh_dentry;
99 struct svc_export *exp = cstate->current_fh.fh_export;
101 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
102 return nfserr_attrnotsupp;
103 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
104 return nfserr_attrnotsupp;
105 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
106 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
107 return nfserr_attrnotsupp;
108 if (writable && !bmval_is_subset(bmval, writable))
110 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
111 (bmval[1] & FATTR4_WORD1_MODE))
117 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
118 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
120 __be32 status = nfs_ok;
122 if (open->op_create == NFS4_OPEN_CREATE) {
123 if (open->op_createmode == NFS4_CREATE_UNCHECKED
124 || open->op_createmode == NFS4_CREATE_GUARDED)
125 status = check_attr_support(rqstp, cstate,
126 open->op_bmval, nfsd_attrmask);
127 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
128 status = check_attr_support(rqstp, cstate,
129 open->op_bmval, nfsd41_ex_attrmask);
136 is_create_with_attrs(struct nfsd4_open *open)
138 return open->op_create == NFS4_OPEN_CREATE
139 && (open->op_createmode == NFS4_CREATE_UNCHECKED
140 || open->op_createmode == NFS4_CREATE_GUARDED
141 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
145 * if error occurs when setting the acl, just clear the acl bit
146 * in the returned attr bitmap.
149 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
150 struct nfs4_acl *acl, u32 *bmval)
154 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
157 * We should probably fail the whole open at this point,
158 * but we've already created the file, so it's too late;
159 * So this seems the least of evils:
161 bmval[0] &= ~FATTR4_WORD0_ACL;
165 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
168 dget(src->fh_dentry);
170 exp_get(src->fh_export);
175 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
179 if (open->op_truncate &&
180 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
183 accmode |= NFSD_MAY_READ_IF_EXEC;
185 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
186 accmode |= NFSD_MAY_READ;
187 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
188 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
189 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
190 accmode |= NFSD_MAY_WRITE;
192 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
197 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
199 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
206 * Using err_symlink as our catch-all case may look odd; but
207 * there's no other obvious error for this case in 4.0, and we
208 * happen to know that it will cause the linux v4 client to do
209 * the right thing on attempts to open something other than a
212 return nfserr_symlink;
215 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
217 if (nfsd4_has_session(cstate))
219 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
224 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
226 struct svc_fh *current_fh = &cstate->current_fh;
230 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
232 return nfserr_jukebox;
233 fh_init(*resfh, NFS4_FHSIZE);
234 open->op_truncate = 0;
236 if (open->op_create) {
237 /* FIXME: check session persistence and pnfs flags.
238 * The nfsv4.1 spec requires the following semantics:
240 * Persistent | pNFS | Server REQUIRED | Client Allowed
241 * Reply Cache | server | |
242 * -------------+--------+-----------------+--------------------
243 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
245 * | | and EXCLUSIVE4 | or EXCLUSIVE4
247 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
248 * yes | no | GUARDED4 | GUARDED4
249 * yes | yes | GUARDED4 | GUARDED4
253 * Note: create modes (UNCHECKED,GUARDED...) are the same
254 * in NFSv4 as in v3 except EXCLUSIVE4_1.
256 current->fs->umask = open->op_umask;
257 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
258 open->op_fname.len, &open->op_iattr,
259 *resfh, open->op_createmode,
260 (u32 *)open->op_verf.data,
261 &open->op_truncate, &open->op_created);
262 current->fs->umask = 0;
264 if (!status && open->op_label.len)
265 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
268 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
269 * use the returned bitmask to indicate which attributes
270 * we used to store the verifier:
272 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
273 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
274 FATTR4_WORD1_TIME_MODIFY);
277 * Note this may exit with the parent still locked.
278 * We will hold the lock until nfsd4_open's final
279 * lookup, to prevent renames or unlinks until we've had
280 * a chance to an acquire a delegation if appropriate.
282 status = nfsd_lookup(rqstp, current_fh,
283 open->op_fname.data, open->op_fname.len, *resfh);
286 status = nfsd_check_obj_isreg(*resfh);
290 if (is_create_with_attrs(open) && open->op_acl != NULL)
291 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
293 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
294 accmode = NFSD_MAY_NOP;
295 if (open->op_created ||
296 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
297 accmode |= NFSD_MAY_OWNER_OVERRIDE;
298 status = do_open_permission(rqstp, *resfh, open, accmode);
299 set_change_info(&open->op_cinfo, current_fh);
305 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
307 struct svc_fh *current_fh = &cstate->current_fh;
311 /* We don't know the target directory, and therefore can not
312 * set the change info
315 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
317 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
319 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
320 (open->op_iattr.ia_size == 0);
322 * In the delegation case, the client is telling us about an
323 * open that it *already* performed locally, some time ago. We
324 * should let it succeed now if possible.
326 * In the case of a CLAIM_FH open, on the other hand, the client
327 * may be counting on us to enforce permissions (the Linux 4.1
328 * client uses this for normal opens, for example).
330 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
331 accmode = NFSD_MAY_OWNER_OVERRIDE;
333 status = do_open_permission(rqstp, current_fh, open, accmode);
339 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
341 struct nfsd4_sessionid *sid =
342 (struct nfsd4_sessionid *)session->se_sessionid.data;
344 clid->cl_boot = sid->clientid.cl_boot;
345 clid->cl_id = sid->clientid.cl_id;
349 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
352 struct nfsd4_open *open = &u->open;
354 struct svc_fh *resfh = NULL;
355 struct net *net = SVC_NET(rqstp);
356 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
358 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
359 (int)open->op_fname.len, open->op_fname.data,
362 /* This check required by spec. */
363 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
366 open->op_created = 0;
369 * Before RECLAIM_COMPLETE done, server should deny new lock
371 if (nfsd4_has_session(cstate) &&
372 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
373 &cstate->session->se_client->cl_flags) &&
374 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
377 if (nfsd4_has_session(cstate))
378 copy_clientid(&open->op_clientid, cstate->session);
380 /* check seqid for replay. set nfs4_owner */
381 status = nfsd4_process_open1(cstate, open, nn);
382 if (status == nfserr_replay_me) {
383 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
384 fh_put(&cstate->current_fh);
385 fh_copy_shallow(&cstate->current_fh.fh_handle,
387 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
389 dprintk("nfsd4_open: replay failed"
390 " restoring previous filehandle\n");
392 status = nfserr_replay_me;
396 if (open->op_xdr_error) {
397 status = open->op_xdr_error;
401 status = nfsd4_check_open_attributes(rqstp, cstate, open);
405 /* Openowner is now set, so sequence id will get bumped. Now we need
406 * these checks before we do any creates: */
407 status = nfserr_grace;
408 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
410 status = nfserr_no_grace;
411 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
414 switch (open->op_claim_type) {
415 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
416 case NFS4_OPEN_CLAIM_NULL:
417 status = do_open_lookup(rqstp, cstate, open, &resfh);
421 case NFS4_OPEN_CLAIM_PREVIOUS:
422 status = nfs4_check_open_reclaim(&open->op_clientid,
426 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
427 case NFS4_OPEN_CLAIM_FH:
428 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
429 status = do_open_fhandle(rqstp, cstate, open);
432 resfh = &cstate->current_fh;
434 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
435 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
436 dprintk("NFSD: unsupported OPEN claim type %d\n",
437 open->op_claim_type);
438 status = nfserr_notsupp;
441 dprintk("NFSD: Invalid OPEN claim type %d\n",
442 open->op_claim_type);
443 status = nfserr_inval;
447 * nfsd4_process_open2() does the actual opening of the file. If
448 * successful, it (1) truncates the file if open->op_truncate was
449 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
451 status = nfsd4_process_open2(rqstp, resfh, open);
452 WARN(status && open->op_created,
453 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
454 be32_to_cpu(status));
456 if (resfh && resfh != &cstate->current_fh) {
457 fh_dup2(&cstate->current_fh, resfh);
461 nfsd4_cleanup_open_state(cstate, open);
462 nfsd4_bump_seqid(cstate, status);
467 * OPEN is the only seqid-mutating operation whose decoding can fail
468 * with a seqid-mutating error (specifically, decoding of user names in
469 * the attributes). Therefore we have to do some processing to look up
470 * the stateowner so that we can bump the seqid.
472 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
474 struct nfsd4_open *open = &op->u.open;
476 if (!seqid_mutating_err(ntohl(op->status)))
478 if (nfsd4_has_session(cstate))
480 open->op_xdr_error = op->status;
481 return nfsd4_open(rqstp, cstate, &op->u);
485 * filehandle-manipulating ops.
488 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
491 u->getfh = &cstate->current_fh;
496 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct nfsd4_putfh *putfh = &u->putfh;
501 fh_put(&cstate->current_fh);
502 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
503 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
505 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
509 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
514 fh_put(&cstate->current_fh);
515 status = exp_pseudoroot(rqstp, &cstate->current_fh);
520 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
523 if (!cstate->save_fh.fh_dentry)
524 return nfserr_restorefh;
526 fh_dup2(&cstate->current_fh, &cstate->save_fh);
527 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
528 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
529 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
535 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
538 fh_dup2(&cstate->save_fh, &cstate->current_fh);
539 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
540 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
541 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
550 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
553 struct nfsd4_access *access = &u->access;
555 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
558 access->ac_resp_access = access->ac_req_access;
559 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
560 &access->ac_supported);
563 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
566 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
569 * This is opaque to client, so no need to byte-swap. Use
570 * __force to keep sparse happy. y2038 time_t overflow is
571 * irrelevant in this usage.
573 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
574 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec;
575 memcpy(verifier->data, verf, sizeof(verifier->data));
579 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
582 struct nfsd4_commit *commit = &u->commit;
584 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
585 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
590 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
593 struct nfsd4_create *create = &u->create;
598 fh_init(&resfh, NFS4_FHSIZE);
600 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
604 status = check_attr_support(rqstp, cstate, create->cr_bmval,
609 current->fs->umask = create->cr_umask;
610 switch (create->cr_type) {
612 status = nfsd_symlink(rqstp, &cstate->current_fh,
613 create->cr_name, create->cr_namelen,
614 create->cr_data, &resfh);
618 status = nfserr_inval;
619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
620 if (MAJOR(rdev) != create->cr_specdata1 ||
621 MINOR(rdev) != create->cr_specdata2)
623 status = nfsd_create(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 &create->cr_iattr, S_IFBLK, rdev, &resfh);
629 status = nfserr_inval;
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_IFCHR, rdev, &resfh);
640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFSOCK, 0, &resfh);
646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFIFO, 0, &resfh);
652 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
653 status = nfsd_create(rqstp, &cstate->current_fh,
654 create->cr_name, create->cr_namelen,
655 &create->cr_iattr, S_IFDIR, 0, &resfh);
659 status = nfserr_badtype;
665 if (create->cr_label.len)
666 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
668 if (create->cr_acl != NULL)
669 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
672 fh_unlock(&cstate->current_fh);
673 set_change_info(&create->cr_cinfo, &cstate->current_fh);
674 fh_dup2(&cstate->current_fh, &resfh);
678 current->fs->umask = 0;
683 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
686 struct nfsd4_getattr *getattr = &u->getattr;
689 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
693 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
696 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
697 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
698 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
700 getattr->ga_fhp = &cstate->current_fh;
705 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 struct nfsd4_link *link = &u->link;
711 status = nfsd_link(rqstp, &cstate->current_fh,
712 link->li_name, link->li_namelen, &cstate->save_fh);
714 set_change_info(&link->li_cinfo, &cstate->current_fh);
718 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
720 struct svc_fh tmp_fh;
723 fh_init(&tmp_fh, NFS4_FHSIZE);
724 ret = exp_pseudoroot(rqstp, &tmp_fh);
727 if (tmp_fh.fh_dentry == fh->fh_dentry) {
732 return nfsd_lookup(rqstp, fh, "..", 2, fh);
736 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
739 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
743 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
746 return nfsd_lookup(rqstp, &cstate->current_fh,
747 u->lookup.lo_name, u->lookup.lo_len,
748 &cstate->current_fh);
752 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
755 struct nfsd4_read *read = &u->read;
758 read->rd_filp = NULL;
759 if (read->rd_offset >= OFFSET_MAX)
762 trace_nfsd_read_start(rqstp, &cstate->current_fh,
763 read->rd_offset, read->rd_length);
766 * If we do a zero copy read, then a client will see read data
767 * that reflects the state of the file *after* performing the
768 * following compound.
770 * To ensure proper ordering, we therefore turn off zero copy if
771 * the client wants us to do more in this compound:
773 if (!nfsd4_last_compound_op(rqstp))
774 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
777 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
778 &read->rd_stateid, RD_STATE,
779 &read->rd_filp, &read->rd_tmp_file);
781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
786 read->rd_rqstp = rqstp;
787 read->rd_fhp = &cstate->current_fh;
793 nfsd4_read_release(union nfsd4_op_u *u)
796 fput(u->read.rd_filp);
797 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
798 u->read.rd_offset, u->read.rd_length);
802 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
805 struct nfsd4_readdir *readdir = &u->readdir;
806 u64 cookie = readdir->rd_cookie;
807 static const nfs4_verifier zeroverf;
809 /* no need to check permission - this will be done in nfsd_readdir() */
811 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
814 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
815 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
816 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
818 if ((cookie == 1) || (cookie == 2) ||
819 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
820 return nfserr_bad_cookie;
822 readdir->rd_rqstp = rqstp;
823 readdir->rd_fhp = &cstate->current_fh;
828 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
831 u->readlink.rl_rqstp = rqstp;
832 u->readlink.rl_fhp = &cstate->current_fh;
837 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
840 struct nfsd4_remove *remove = &u->remove;
843 if (opens_in_grace(SVC_NET(rqstp)))
845 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
846 remove->rm_name, remove->rm_namelen);
848 fh_unlock(&cstate->current_fh);
849 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
855 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
858 struct nfsd4_rename *rename = &u->rename;
861 if (opens_in_grace(SVC_NET(rqstp)) &&
862 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
864 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
865 rename->rn_snamelen, &cstate->current_fh,
866 rename->rn_tname, rename->rn_tnamelen);
869 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
870 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
875 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
878 struct nfsd4_secinfo *secinfo = &u->secinfo;
879 struct svc_export *exp;
880 struct dentry *dentry;
883 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
886 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
887 secinfo->si_name, secinfo->si_namelen,
891 fh_unlock(&cstate->current_fh);
892 if (d_really_is_negative(dentry)) {
896 secinfo->si_exp = exp;
898 if (cstate->minorversion)
899 /* See rfc 5661 section 2.6.3.1.1.8 */
900 fh_put(&cstate->current_fh);
905 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
910 switch (u->secinfo_no_name.sin_style) {
911 case NFS4_SECINFO_STYLE4_CURRENT_FH:
913 case NFS4_SECINFO_STYLE4_PARENT:
914 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
922 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
923 fh_put(&cstate->current_fh);
928 nfsd4_secinfo_release(union nfsd4_op_u *u)
930 if (u->secinfo.si_exp)
931 exp_put(u->secinfo.si_exp);
935 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
937 if (u->secinfo_no_name.sin_exp)
938 exp_put(u->secinfo_no_name.sin_exp);
942 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
945 struct nfsd4_setattr *setattr = &u->setattr;
946 __be32 status = nfs_ok;
949 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
950 status = nfs4_preprocess_stateid_op(rqstp, cstate,
951 &cstate->current_fh, &setattr->sa_stateid,
952 WR_STATE, NULL, NULL);
954 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
958 err = fh_want_write(&cstate->current_fh);
960 return nfserrno(err);
963 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
968 if (setattr->sa_acl != NULL)
969 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
973 if (setattr->sa_label.len)
974 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
978 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
981 fh_drop_write(&cstate->current_fh);
985 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
988 int buflen = write->wr_buflen;
990 vec[0].iov_base = write->wr_head.iov_base;
991 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
992 buflen -= vec[0].iov_len;
995 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
996 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
997 buflen -= vec[i].iov_len;
1004 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1005 union nfsd4_op_u *u)
1007 struct nfsd4_write *write = &u->write;
1008 stateid_t *stateid = &write->wr_stateid;
1009 struct file *filp = NULL;
1010 __be32 status = nfs_ok;
1014 if (write->wr_offset >= OFFSET_MAX)
1015 return nfserr_inval;
1017 cnt = write->wr_buflen;
1018 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1019 write->wr_offset, cnt);
1020 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1021 stateid, WR_STATE, &filp, NULL);
1023 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1027 write->wr_how_written = write->wr_stable_how;
1028 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1030 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1031 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1033 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1034 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1035 write->wr_how_written);
1038 write->wr_bytes_written = cnt;
1039 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1040 write->wr_offset, cnt);
1045 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1046 stateid_t *src_stateid, struct file **src,
1047 stateid_t *dst_stateid, struct file **dst)
1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1052 src_stateid, RD_STATE, src, NULL);
1054 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1058 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1059 dst_stateid, WR_STATE, dst, NULL);
1061 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1065 /* fix up for NFS-specific error code */
1066 if (!S_ISREG(file_inode(*src)->i_mode) ||
1067 !S_ISREG(file_inode(*dst)->i_mode)) {
1068 status = nfserr_wrong_type;
1082 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1083 union nfsd4_op_u *u)
1085 struct nfsd4_clone *clone = &u->clone;
1086 struct file *src, *dst;
1089 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1090 &clone->cl_dst_stateid, &dst);
1094 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1095 dst, clone->cl_dst_pos, clone->cl_count);
1104 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1105 union nfsd4_op_u *u)
1107 struct nfsd4_copy *copy = &u->copy;
1108 struct file *src, *dst;
1112 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1113 ©->cp_dst_stateid, &dst);
1117 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1118 dst, copy->cp_dst_pos, copy->cp_count);
1121 status = nfserrno(bytes);
1123 copy->cp_res.wr_bytes_written = bytes;
1124 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1125 copy->cp_synchronous = 1;
1126 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1137 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1138 struct nfsd4_fallocate *fallocate, int flags)
1140 __be32 status = nfserr_notsupp;
1143 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1144 &fallocate->falloc_stateid,
1145 WR_STATE, &file, NULL);
1146 if (status != nfs_ok) {
1147 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1151 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1152 fallocate->falloc_offset,
1153 fallocate->falloc_length,
1160 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1161 union nfsd4_op_u *u)
1163 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1167 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1168 union nfsd4_op_u *u)
1170 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1171 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1175 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1176 union nfsd4_op_u *u)
1178 struct nfsd4_seek *seek = &u->seek;
1183 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1184 &seek->seek_stateid,
1185 RD_STATE, &file, NULL);
1187 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1191 switch (seek->seek_whence) {
1192 case NFS4_CONTENT_DATA:
1195 case NFS4_CONTENT_HOLE:
1199 status = nfserr_union_notsupp;
1204 * Note: This call does change file->f_pos, but nothing in NFSD
1205 * should ever file->f_pos.
1207 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1208 if (seek->seek_pos < 0)
1209 status = nfserrno(seek->seek_pos);
1210 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1211 seek->seek_eof = true;
1218 /* This routine never returns NFS_OK! If there are no other errors, it
1219 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1220 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1221 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1224 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1225 struct nfsd4_verify *verify)
1231 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1235 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1239 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1240 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1241 return nfserr_inval;
1242 if (verify->ve_attrlen & 3)
1243 return nfserr_inval;
1246 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1248 count = 4 + (verify->ve_attrlen >> 2);
1249 buf = kmalloc(count << 2, GFP_KERNEL);
1251 return nfserr_jukebox;
1254 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1255 cstate->current_fh.fh_export,
1256 cstate->current_fh.fh_dentry,
1260 * If nfsd4_encode_fattr() ran out of space, assume that's because
1261 * the attributes are longer (hence different) than those given:
1263 if (status == nfserr_resource)
1264 status = nfserr_not_same;
1269 p = buf + 1 + ntohl(buf[0]);
1270 status = nfserr_not_same;
1271 if (ntohl(*p++) != verify->ve_attrlen)
1273 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1274 status = nfserr_same;
1282 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1283 union nfsd4_op_u *u)
1287 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1288 return status == nfserr_not_same ? nfs_ok : status;
1292 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1293 union nfsd4_op_u *u)
1297 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1298 return status == nfserr_same ? nfs_ok : status;
1301 #ifdef CONFIG_NFSD_PNFS
1302 static const struct nfsd4_layout_ops *
1303 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1305 if (!exp->ex_layout_types) {
1306 dprintk("%s: export does not support pNFS\n", __func__);
1310 if (layout_type >= LAYOUT_TYPE_MAX ||
1311 !(exp->ex_layout_types & (1 << layout_type))) {
1312 dprintk("%s: layout type %d not supported\n",
1313 __func__, layout_type);
1317 return nfsd4_layout_ops[layout_type];
1321 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1322 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1324 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1325 const struct nfsd4_layout_ops *ops;
1326 struct nfsd4_deviceid_map *map;
1327 struct svc_export *exp;
1330 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1332 gdp->gd_layout_type,
1333 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1336 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1338 dprintk("%s: couldn't find device ID to export mapping!\n",
1340 return nfserr_noent;
1343 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1345 dprintk("%s: could not find device id\n", __func__);
1346 return nfserr_noent;
1349 nfserr = nfserr_layoutunavailable;
1350 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1355 if (gdp->gd_maxcount != 0) {
1356 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1357 rqstp, cstate->session->se_client, gdp);
1360 gdp->gd_notify_types &= ops->notify_types;
1367 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1369 kfree(u->getdeviceinfo.gd_device);
1373 nfsd4_layoutget(struct svc_rqst *rqstp,
1374 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1376 struct nfsd4_layoutget *lgp = &u->layoutget;
1377 struct svc_fh *current_fh = &cstate->current_fh;
1378 const struct nfsd4_layout_ops *ops;
1379 struct nfs4_layout_stateid *ls;
1381 int accmode = NFSD_MAY_READ_IF_EXEC;
1383 switch (lgp->lg_seg.iomode) {
1385 accmode |= NFSD_MAY_READ;
1388 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1391 dprintk("%s: invalid iomode %d\n",
1392 __func__, lgp->lg_seg.iomode);
1393 nfserr = nfserr_badiomode;
1397 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1401 nfserr = nfserr_layoutunavailable;
1402 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1407 * Verify minlength and range as per RFC5661:
1408 * o If loga_length is less than loga_minlength,
1409 * the metadata server MUST return NFS4ERR_INVAL.
1410 * o If the sum of loga_offset and loga_minlength exceeds
1411 * NFS4_UINT64_MAX, and loga_minlength is not
1412 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1413 * o If the sum of loga_offset and loga_length exceeds
1414 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1415 * the error NFS4ERR_INVAL MUST result.
1417 nfserr = nfserr_inval;
1418 if (lgp->lg_seg.length < lgp->lg_minlength ||
1419 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1420 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1421 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1422 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1424 if (lgp->lg_seg.length == 0)
1427 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1428 true, lgp->lg_layout_type, &ls);
1430 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1434 nfserr = nfserr_recallconflict;
1435 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1438 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1443 nfserr = nfsd4_insert_layout(lgp, ls);
1446 mutex_unlock(&ls->ls_mutex);
1447 nfs4_put_stid(&ls->ls_stid);
1453 nfsd4_layoutget_release(union nfsd4_op_u *u)
1455 kfree(u->layoutget.lg_content);
1459 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1460 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1462 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1463 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1464 struct svc_fh *current_fh = &cstate->current_fh;
1465 const struct nfsd4_layout_ops *ops;
1466 loff_t new_size = lcp->lc_last_wr + 1;
1467 struct inode *inode;
1468 struct nfs4_layout_stateid *ls;
1471 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1475 nfserr = nfserr_layoutunavailable;
1476 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1479 inode = d_inode(current_fh->fh_dentry);
1481 nfserr = nfserr_inval;
1482 if (new_size <= seg->offset) {
1483 dprintk("pnfsd: last write before layout segment\n");
1486 if (new_size > seg->offset + seg->length) {
1487 dprintk("pnfsd: last write beyond layout segment\n");
1490 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1491 dprintk("pnfsd: layoutcommit beyond EOF\n");
1495 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1496 false, lcp->lc_layout_type,
1499 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
1500 /* fixup error code as per RFC5661 */
1501 if (nfserr == nfserr_bad_stateid)
1502 nfserr = nfserr_badlayout;
1506 /* LAYOUTCOMMIT does not require any serialization */
1507 mutex_unlock(&ls->ls_mutex);
1509 if (new_size > i_size_read(inode)) {
1510 lcp->lc_size_chg = 1;
1511 lcp->lc_newsize = new_size;
1513 lcp->lc_size_chg = 0;
1516 nfserr = ops->proc_layoutcommit(inode, lcp);
1517 nfs4_put_stid(&ls->ls_stid);
1523 nfsd4_layoutreturn(struct svc_rqst *rqstp,
1524 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1526 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1527 struct svc_fh *current_fh = &cstate->current_fh;
1530 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1534 nfserr = nfserr_layoutunavailable;
1535 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1538 switch (lrp->lr_seg.iomode) {
1544 dprintk("%s: invalid iomode %d\n", __func__,
1545 lrp->lr_seg.iomode);
1546 nfserr = nfserr_inval;
1550 switch (lrp->lr_return_type) {
1552 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1556 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1559 dprintk("%s: invalid return_type %d\n", __func__,
1560 lrp->lr_return_type);
1561 nfserr = nfserr_inval;
1567 #endif /* CONFIG_NFSD_PNFS */
1573 nfsd4_proc_null(struct svc_rqst *rqstp)
1578 static inline void nfsd4_increment_op_stats(u32 opnum)
1580 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1581 nfsdstats.nfs4_opcount[opnum]++;
1584 static const struct nfsd4_operation nfsd4_ops[];
1586 static const char *nfsd4_op_name(unsigned opnum);
1589 * Enforce NFSv4.1 COMPOUND ordering rules:
1591 * Also note, enforced elsewhere:
1592 * - SEQUENCE other than as first op results in
1593 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1594 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1595 * (Enforced in nfsd4_bind_conn_to_session().)
1596 * - DESTROY_SESSION must be the final operation in a compound, if
1597 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1598 * (Enforced in nfsd4_destroy_session().)
1600 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1602 struct nfsd4_op *op = &args->ops[0];
1604 /* These ordering requirements don't apply to NFSv4.0: */
1605 if (args->minorversion == 0)
1607 /* This is weird, but OK, not our problem: */
1608 if (args->opcnt == 0)
1610 if (op->status == nfserr_op_illegal)
1612 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1613 return nfserr_op_not_in_session;
1614 if (op->opnum == OP_SEQUENCE)
1616 if (args->opcnt != 1)
1617 return nfserr_not_only_op;
1621 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1623 return &nfsd4_ops[op->opnum];
1626 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1628 if (op->opnum == OP_ILLEGAL)
1630 return OPDESC(op)->op_flags & OP_CACHEME;
1633 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1635 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1636 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1637 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1638 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1639 const struct nfsd4_operation *thisd = OPDESC(this);
1640 const struct nfsd4_operation *nextd;
1643 * Most ops check wronsec on our own; only the putfh-like ops
1644 * have special rules.
1646 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1649 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1650 * put-filehandle operation if we're not going to use the
1653 if (argp->opcnt == resp->opcnt)
1655 if (next->opnum == OP_ILLEGAL)
1657 nextd = OPDESC(next);
1659 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1660 * errors themselves as necessary; others should check for them
1663 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1666 static void svcxdr_init_encode(struct svc_rqst *rqstp,
1667 struct nfsd4_compoundres *resp)
1669 struct xdr_stream *xdr = &resp->xdr;
1670 struct xdr_buf *buf = &rqstp->rq_res;
1671 struct kvec *head = buf->head;
1675 xdr->p = head->iov_base + head->iov_len;
1676 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1677 /* Tail and page_len should be zero at this point: */
1678 buf->len = buf->head[0].iov_len;
1679 xdr->scratch.iov_len = 0;
1680 xdr->page_ptr = buf->pages - 1;
1681 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1682 - rqstp->rq_auth_slack;
1689 nfsd4_proc_compound(struct svc_rqst *rqstp)
1691 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1692 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1693 struct nfsd4_op *op;
1694 struct nfsd4_compound_state *cstate = &resp->cstate;
1695 struct svc_fh *current_fh = &cstate->current_fh;
1696 struct svc_fh *save_fh = &cstate->save_fh;
1699 svcxdr_init_encode(rqstp, resp);
1700 resp->tagp = resp->xdr.p;
1701 /* reserve space for: taglen, tag, and opcnt */
1702 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1703 resp->taglen = args->taglen;
1704 resp->tag = args->tag;
1705 resp->rqstp = rqstp;
1706 cstate->minorversion = args->minorversion;
1707 fh_init(current_fh, NFS4_FHSIZE);
1708 fh_init(save_fh, NFS4_FHSIZE);
1710 * Don't use the deferral mechanism for NFSv4; compounds make it
1711 * too hard to avoid non-idempotency problems.
1713 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1716 * According to RFC3010, this takes precedence over all other errors.
1718 status = nfserr_minor_vers_mismatch;
1719 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1721 status = nfserr_resource;
1722 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1725 status = nfs41_check_op_ordering(args);
1728 op->status = status;
1732 trace_nfsd_compound(rqstp, args->opcnt);
1733 while (!status && resp->opcnt < args->opcnt) {
1734 op = &args->ops[resp->opcnt++];
1737 * The XDR decode routines may have pre-set op->status;
1738 * for example, if there is a miscellaneous XDR error
1739 * it will be set to nfserr_bad_xdr.
1742 if (op->opnum == OP_OPEN)
1743 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1747 if (!current_fh->fh_dentry) {
1748 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1749 op->status = nfserr_nofilehandle;
1752 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1753 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1754 op->status = nfserr_moved;
1758 fh_clear_wcc(current_fh);
1760 /* If op is non-idempotent */
1761 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1763 * Don't execute this op if we couldn't encode a
1766 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
1768 * Plus if there's another operation, make sure
1769 * we'll have space to at least encode an error:
1771 if (resp->opcnt < args->opcnt)
1772 plen += COMPOUND_ERR_SLACK_SPACE;
1773 op->status = nfsd4_check_resp_size(resp, plen);
1779 if (op->opdesc->op_get_currentstateid)
1780 op->opdesc->op_get_currentstateid(cstate, &op->u);
1781 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1783 /* Only from SEQUENCE */
1784 if (cstate->status == nfserr_replay_cache) {
1785 dprintk("%s NFS4.1 replay from cache\n", __func__);
1786 status = op->status;
1790 if (op->opdesc->op_set_currentstateid)
1791 op->opdesc->op_set_currentstateid(cstate, &op->u);
1793 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
1794 clear_current_stateid(cstate);
1796 if (need_wrongsec_check(rqstp))
1797 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1800 if (op->status == nfserr_replay_me) {
1801 op->replay = &cstate->replay_owner->so_replay;
1802 nfsd4_encode_replay(&resp->xdr, op);
1803 status = op->status = op->replay->rp_status;
1805 nfsd4_encode_operation(resp, op);
1806 status = op->status;
1809 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
1810 nfsd4_op_name(op->opnum));
1812 nfsd4_cstate_clear_replay(cstate);
1813 nfsd4_increment_op_stats(op->opnum);
1816 cstate->status = status;
1819 BUG_ON(cstate->replay_owner);
1821 /* Reset deferral mechanism for RPC deferrals */
1822 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1823 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1827 #define op_encode_hdr_size (2)
1828 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1829 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1830 #define op_encode_change_info_maxsz (5)
1831 #define nfs4_fattr_bitmap_maxsz (4)
1833 /* We'll fall back on returning no lockowner if run out of space: */
1834 #define op_encode_lockowner_maxsz (0)
1835 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1837 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1839 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1840 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1841 op_encode_ace_maxsz)
1843 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1845 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1847 return (op_encode_hdr_size) * sizeof(__be32);
1850 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1852 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1855 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1857 /* ac_supported, ac_resp_access */
1858 return (op_encode_hdr_size + 2)* sizeof(__be32);
1861 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1863 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1866 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1868 return (op_encode_hdr_size + op_encode_change_info_maxsz
1869 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1873 * Note since this is an idempotent operation we won't insist on failing
1874 * the op prematurely if the estimate is too large. We may turn off splice
1875 * reads unnecessarily.
1877 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1878 struct nfsd4_op *op)
1880 u32 *bmap = op->u.getattr.ga_bmval;
1881 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1884 if (bmap0 & FATTR4_WORD0_ACL)
1885 return svc_max_payload(rqstp);
1886 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1887 return svc_max_payload(rqstp);
1889 if (bmap1 & FATTR4_WORD1_OWNER) {
1890 ret += IDMAP_NAMESZ + 4;
1891 bmap1 &= ~FATTR4_WORD1_OWNER;
1893 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1894 ret += IDMAP_NAMESZ + 4;
1895 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1897 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1898 ret += NFS4_FHSIZE + 4;
1899 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1901 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1902 ret += NFS4_MAXLABELLEN + 12;
1903 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1906 * Largest of remaining attributes are 16 bytes (e.g.,
1907 * supported_attributes)
1909 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1910 /* bitmask, length */
1915 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1917 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1920 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1922 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1926 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1928 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1932 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1934 return (op_encode_hdr_size + op_encode_stateid_maxsz
1935 + op_encode_change_info_maxsz + 1
1936 + nfs4_fattr_bitmap_maxsz
1937 + op_encode_delegation_maxsz) * sizeof(__be32);
1940 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1942 u32 maxcount = 0, rlen = 0;
1944 maxcount = svc_max_payload(rqstp);
1945 rlen = min(op->u.read.rd_length, maxcount);
1947 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1950 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1952 u32 maxcount = 0, rlen = 0;
1954 maxcount = svc_max_payload(rqstp);
1955 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1957 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1958 XDR_QUADLEN(rlen)) * sizeof(__be32);
1961 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1963 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1966 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1968 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1972 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1974 return (op_encode_hdr_size + op_encode_change_info_maxsz
1975 + op_encode_change_info_maxsz) * sizeof(__be32);
1978 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1979 struct nfsd4_op *op)
1981 return (op_encode_hdr_size
1982 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1985 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1987 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1991 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1993 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1996 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1998 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1999 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2002 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2004 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2008 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2010 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2013 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2015 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2016 1 + 1 + /* eir_flags, spr_how */\
2017 4 + /* spo_must_enforce & _allow with bitmap */\
2018 2 + /*eir_server_owner.so_minor_id */\
2019 /* eir_server_owner.so_major_id<> */\
2020 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2021 /* eir_server_scope<> */\
2022 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2023 1 + /* eir_server_impl_id array length */\
2024 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2027 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2029 return (op_encode_hdr_size + \
2030 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2031 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2034 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2036 return (op_encode_hdr_size + \
2037 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2038 2 + /* csr_sequence, csr_flags */\
2039 op_encode_channel_attrs_maxsz + \
2040 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2043 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2045 return (op_encode_hdr_size +
2046 1 /* wr_callback */ +
2047 op_encode_stateid_maxsz /* wr_callback */ +
2049 1 /* wr_committed */ +
2050 op_encode_verifier_maxsz +
2051 1 /* cr_consecutive */ +
2052 1 /* cr_synchronous */) * sizeof(__be32);
2055 #ifdef CONFIG_NFSD_PNFS
2056 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2058 u32 maxcount = 0, rlen = 0;
2060 maxcount = svc_max_payload(rqstp);
2061 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2063 return (op_encode_hdr_size +
2064 1 /* gd_layout_type*/ +
2066 2 /* gd_notify_types */) * sizeof(__be32);
2070 * At this stage we don't really know what layout driver will handle the request,
2071 * so we need to define an arbitrary upper bound here.
2073 #define MAX_LAYOUT_SIZE 128
2074 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2076 return (op_encode_hdr_size +
2077 1 /* logr_return_on_close */ +
2078 op_encode_stateid_maxsz +
2079 1 /* nr of layouts */ +
2080 MAX_LAYOUT_SIZE) * sizeof(__be32);
2083 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2085 return (op_encode_hdr_size +
2086 1 /* locr_newsize */ +
2087 2 /* ns_size */) * sizeof(__be32);
2090 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2092 return (op_encode_hdr_size +
2093 1 /* lrs_stateid */ +
2094 op_encode_stateid_maxsz) * sizeof(__be32);
2096 #endif /* CONFIG_NFSD_PNFS */
2099 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2101 return (op_encode_hdr_size + 3) * sizeof(__be32);
2104 static const struct nfsd4_operation nfsd4_ops[] = {
2106 .op_func = nfsd4_access,
2107 .op_name = "OP_ACCESS",
2108 .op_rsize_bop = nfsd4_access_rsize,
2111 .op_func = nfsd4_close,
2112 .op_flags = OP_MODIFIES_SOMETHING,
2113 .op_name = "OP_CLOSE",
2114 .op_rsize_bop = nfsd4_status_stateid_rsize,
2115 .op_get_currentstateid = nfsd4_get_closestateid,
2116 .op_set_currentstateid = nfsd4_set_closestateid,
2119 .op_func = nfsd4_commit,
2120 .op_flags = OP_MODIFIES_SOMETHING,
2121 .op_name = "OP_COMMIT",
2122 .op_rsize_bop = nfsd4_commit_rsize,
2125 .op_func = nfsd4_create,
2126 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2127 .op_name = "OP_CREATE",
2128 .op_rsize_bop = nfsd4_create_rsize,
2130 [OP_DELEGRETURN] = {
2131 .op_func = nfsd4_delegreturn,
2132 .op_flags = OP_MODIFIES_SOMETHING,
2133 .op_name = "OP_DELEGRETURN",
2134 .op_rsize_bop = nfsd4_only_status_rsize,
2135 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2138 .op_func = nfsd4_getattr,
2139 .op_flags = ALLOWED_ON_ABSENT_FS,
2140 .op_rsize_bop = nfsd4_getattr_rsize,
2141 .op_name = "OP_GETATTR",
2144 .op_func = nfsd4_getfh,
2145 .op_name = "OP_GETFH",
2146 .op_rsize_bop = nfsd4_getfh_rsize,
2149 .op_func = nfsd4_link,
2150 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2152 .op_name = "OP_LINK",
2153 .op_rsize_bop = nfsd4_link_rsize,
2156 .op_func = nfsd4_lock,
2157 .op_flags = OP_MODIFIES_SOMETHING |
2158 OP_NONTRIVIAL_ERROR_ENCODE,
2159 .op_name = "OP_LOCK",
2160 .op_rsize_bop = nfsd4_lock_rsize,
2161 .op_set_currentstateid = nfsd4_set_lockstateid,
2164 .op_func = nfsd4_lockt,
2165 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2166 .op_name = "OP_LOCKT",
2167 .op_rsize_bop = nfsd4_lock_rsize,
2170 .op_func = nfsd4_locku,
2171 .op_flags = OP_MODIFIES_SOMETHING,
2172 .op_name = "OP_LOCKU",
2173 .op_rsize_bop = nfsd4_status_stateid_rsize,
2174 .op_get_currentstateid = nfsd4_get_lockustateid,
2177 .op_func = nfsd4_lookup,
2178 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2179 .op_name = "OP_LOOKUP",
2180 .op_rsize_bop = nfsd4_only_status_rsize,
2183 .op_func = nfsd4_lookupp,
2184 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2185 .op_name = "OP_LOOKUPP",
2186 .op_rsize_bop = nfsd4_only_status_rsize,
2189 .op_func = nfsd4_nverify,
2190 .op_name = "OP_NVERIFY",
2191 .op_rsize_bop = nfsd4_only_status_rsize,
2194 .op_func = nfsd4_open,
2195 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2196 .op_name = "OP_OPEN",
2197 .op_rsize_bop = nfsd4_open_rsize,
2198 .op_set_currentstateid = nfsd4_set_openstateid,
2200 [OP_OPEN_CONFIRM] = {
2201 .op_func = nfsd4_open_confirm,
2202 .op_flags = OP_MODIFIES_SOMETHING,
2203 .op_name = "OP_OPEN_CONFIRM",
2204 .op_rsize_bop = nfsd4_status_stateid_rsize,
2206 [OP_OPEN_DOWNGRADE] = {
2207 .op_func = nfsd4_open_downgrade,
2208 .op_flags = OP_MODIFIES_SOMETHING,
2209 .op_name = "OP_OPEN_DOWNGRADE",
2210 .op_rsize_bop = nfsd4_status_stateid_rsize,
2211 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2212 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2215 .op_func = nfsd4_putfh,
2216 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2217 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2218 .op_name = "OP_PUTFH",
2219 .op_rsize_bop = nfsd4_only_status_rsize,
2222 .op_func = nfsd4_putrootfh,
2223 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2224 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2225 .op_name = "OP_PUTPUBFH",
2226 .op_rsize_bop = nfsd4_only_status_rsize,
2229 .op_func = nfsd4_putrootfh,
2230 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2231 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2232 .op_name = "OP_PUTROOTFH",
2233 .op_rsize_bop = nfsd4_only_status_rsize,
2236 .op_func = nfsd4_read,
2237 .op_release = nfsd4_read_release,
2238 .op_name = "OP_READ",
2239 .op_rsize_bop = nfsd4_read_rsize,
2240 .op_get_currentstateid = nfsd4_get_readstateid,
2243 .op_func = nfsd4_readdir,
2244 .op_name = "OP_READDIR",
2245 .op_rsize_bop = nfsd4_readdir_rsize,
2248 .op_func = nfsd4_readlink,
2249 .op_name = "OP_READLINK",
2250 .op_rsize_bop = nfsd4_readlink_rsize,
2253 .op_func = nfsd4_remove,
2254 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2255 .op_name = "OP_REMOVE",
2256 .op_rsize_bop = nfsd4_remove_rsize,
2259 .op_func = nfsd4_rename,
2260 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2261 .op_name = "OP_RENAME",
2262 .op_rsize_bop = nfsd4_rename_rsize,
2265 .op_func = nfsd4_renew,
2266 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2267 | OP_MODIFIES_SOMETHING,
2268 .op_name = "OP_RENEW",
2269 .op_rsize_bop = nfsd4_only_status_rsize,
2273 .op_func = nfsd4_restorefh,
2274 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2275 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2276 .op_name = "OP_RESTOREFH",
2277 .op_rsize_bop = nfsd4_only_status_rsize,
2280 .op_func = nfsd4_savefh,
2281 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2282 .op_name = "OP_SAVEFH",
2283 .op_rsize_bop = nfsd4_only_status_rsize,
2286 .op_func = nfsd4_secinfo,
2287 .op_release = nfsd4_secinfo_release,
2288 .op_flags = OP_HANDLES_WRONGSEC,
2289 .op_name = "OP_SECINFO",
2290 .op_rsize_bop = nfsd4_secinfo_rsize,
2293 .op_func = nfsd4_setattr,
2294 .op_name = "OP_SETATTR",
2295 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2296 | OP_NONTRIVIAL_ERROR_ENCODE,
2297 .op_rsize_bop = nfsd4_setattr_rsize,
2298 .op_get_currentstateid = nfsd4_get_setattrstateid,
2300 [OP_SETCLIENTID] = {
2301 .op_func = nfsd4_setclientid,
2302 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2303 | OP_MODIFIES_SOMETHING | OP_CACHEME
2304 | OP_NONTRIVIAL_ERROR_ENCODE,
2305 .op_name = "OP_SETCLIENTID",
2306 .op_rsize_bop = nfsd4_setclientid_rsize,
2308 [OP_SETCLIENTID_CONFIRM] = {
2309 .op_func = nfsd4_setclientid_confirm,
2310 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2311 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2312 .op_name = "OP_SETCLIENTID_CONFIRM",
2313 .op_rsize_bop = nfsd4_only_status_rsize,
2316 .op_func = nfsd4_verify,
2317 .op_name = "OP_VERIFY",
2318 .op_rsize_bop = nfsd4_only_status_rsize,
2321 .op_func = nfsd4_write,
2322 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2323 .op_name = "OP_WRITE",
2324 .op_rsize_bop = nfsd4_write_rsize,
2325 .op_get_currentstateid = nfsd4_get_writestateid,
2327 [OP_RELEASE_LOCKOWNER] = {
2328 .op_func = nfsd4_release_lockowner,
2329 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2330 | OP_MODIFIES_SOMETHING,
2331 .op_name = "OP_RELEASE_LOCKOWNER",
2332 .op_rsize_bop = nfsd4_only_status_rsize,
2335 /* NFSv4.1 operations */
2336 [OP_EXCHANGE_ID] = {
2337 .op_func = nfsd4_exchange_id,
2338 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2339 | OP_MODIFIES_SOMETHING,
2340 .op_name = "OP_EXCHANGE_ID",
2341 .op_rsize_bop = nfsd4_exchange_id_rsize,
2343 [OP_BACKCHANNEL_CTL] = {
2344 .op_func = nfsd4_backchannel_ctl,
2345 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2346 .op_name = "OP_BACKCHANNEL_CTL",
2347 .op_rsize_bop = nfsd4_only_status_rsize,
2349 [OP_BIND_CONN_TO_SESSION] = {
2350 .op_func = nfsd4_bind_conn_to_session,
2351 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2352 | OP_MODIFIES_SOMETHING,
2353 .op_name = "OP_BIND_CONN_TO_SESSION",
2354 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2356 [OP_CREATE_SESSION] = {
2357 .op_func = nfsd4_create_session,
2358 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2359 | OP_MODIFIES_SOMETHING,
2360 .op_name = "OP_CREATE_SESSION",
2361 .op_rsize_bop = nfsd4_create_session_rsize,
2363 [OP_DESTROY_SESSION] = {
2364 .op_func = nfsd4_destroy_session,
2365 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2366 | OP_MODIFIES_SOMETHING,
2367 .op_name = "OP_DESTROY_SESSION",
2368 .op_rsize_bop = nfsd4_only_status_rsize,
2371 .op_func = nfsd4_sequence,
2372 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2373 .op_name = "OP_SEQUENCE",
2374 .op_rsize_bop = nfsd4_sequence_rsize,
2376 [OP_DESTROY_CLIENTID] = {
2377 .op_func = nfsd4_destroy_clientid,
2378 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2379 | OP_MODIFIES_SOMETHING,
2380 .op_name = "OP_DESTROY_CLIENTID",
2381 .op_rsize_bop = nfsd4_only_status_rsize,
2383 [OP_RECLAIM_COMPLETE] = {
2384 .op_func = nfsd4_reclaim_complete,
2385 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2386 .op_name = "OP_RECLAIM_COMPLETE",
2387 .op_rsize_bop = nfsd4_only_status_rsize,
2389 [OP_SECINFO_NO_NAME] = {
2390 .op_func = nfsd4_secinfo_no_name,
2391 .op_release = nfsd4_secinfo_no_name_release,
2392 .op_flags = OP_HANDLES_WRONGSEC,
2393 .op_name = "OP_SECINFO_NO_NAME",
2394 .op_rsize_bop = nfsd4_secinfo_rsize,
2396 [OP_TEST_STATEID] = {
2397 .op_func = nfsd4_test_stateid,
2398 .op_flags = ALLOWED_WITHOUT_FH,
2399 .op_name = "OP_TEST_STATEID",
2400 .op_rsize_bop = nfsd4_test_stateid_rsize,
2402 [OP_FREE_STATEID] = {
2403 .op_func = nfsd4_free_stateid,
2404 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2405 .op_name = "OP_FREE_STATEID",
2406 .op_get_currentstateid = nfsd4_get_freestateid,
2407 .op_rsize_bop = nfsd4_only_status_rsize,
2409 #ifdef CONFIG_NFSD_PNFS
2410 [OP_GETDEVICEINFO] = {
2411 .op_func = nfsd4_getdeviceinfo,
2412 .op_release = nfsd4_getdeviceinfo_release,
2413 .op_flags = ALLOWED_WITHOUT_FH,
2414 .op_name = "OP_GETDEVICEINFO",
2415 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2418 .op_func = nfsd4_layoutget,
2419 .op_release = nfsd4_layoutget_release,
2420 .op_flags = OP_MODIFIES_SOMETHING,
2421 .op_name = "OP_LAYOUTGET",
2422 .op_rsize_bop = nfsd4_layoutget_rsize,
2424 [OP_LAYOUTCOMMIT] = {
2425 .op_func = nfsd4_layoutcommit,
2426 .op_flags = OP_MODIFIES_SOMETHING,
2427 .op_name = "OP_LAYOUTCOMMIT",
2428 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2430 [OP_LAYOUTRETURN] = {
2431 .op_func = nfsd4_layoutreturn,
2432 .op_flags = OP_MODIFIES_SOMETHING,
2433 .op_name = "OP_LAYOUTRETURN",
2434 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2436 #endif /* CONFIG_NFSD_PNFS */
2438 /* NFSv4.2 operations */
2440 .op_func = nfsd4_allocate,
2441 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2442 .op_name = "OP_ALLOCATE",
2443 .op_rsize_bop = nfsd4_only_status_rsize,
2446 .op_func = nfsd4_deallocate,
2447 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2448 .op_name = "OP_DEALLOCATE",
2449 .op_rsize_bop = nfsd4_only_status_rsize,
2452 .op_func = nfsd4_clone,
2453 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2454 .op_name = "OP_CLONE",
2455 .op_rsize_bop = nfsd4_only_status_rsize,
2458 .op_func = nfsd4_copy,
2459 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2460 .op_name = "OP_COPY",
2461 .op_rsize_bop = nfsd4_copy_rsize,
2464 .op_func = nfsd4_seek,
2465 .op_name = "OP_SEEK",
2466 .op_rsize_bop = nfsd4_seek_rsize,
2471 * nfsd4_spo_must_allow - Determine if the compound op contains an
2472 * operation that is allowed to be sent with machine credentials
2474 * @rqstp: a pointer to the struct svc_rqst
2476 * Checks to see if the compound contains a spo_must_allow op
2477 * and confirms that it was sent with the proper machine creds.
2480 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2482 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2483 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2484 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2485 struct nfsd4_compound_state *cstate = &resp->cstate;
2486 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2489 if (!cstate->minorversion)
2492 if (cstate->spo_must_allowed == true)
2495 opiter = resp->opcnt;
2496 while (opiter < argp->opcnt) {
2497 this = &argp->ops[opiter++];
2498 if (test_bit(this->opnum, allow->u.longs) &&
2499 cstate->clp->cl_mach_cred &&
2500 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2501 cstate->spo_must_allowed = true;
2505 cstate->spo_must_allowed = false;
2509 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2511 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2512 return op_encode_hdr_size * sizeof(__be32);
2514 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2515 return OPDESC(op)->op_rsize_bop(rqstp, op);
2518 void warn_on_nonidempotent_op(struct nfsd4_op *op)
2520 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2521 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2522 op->opnum, nfsd4_op_name(op->opnum));
2527 static const char *nfsd4_op_name(unsigned opnum)
2529 if (opnum < ARRAY_SIZE(nfsd4_ops))
2530 return nfsd4_ops[opnum].op_name;
2531 return "unknown_operation";
2534 #define nfsd4_voidres nfsd4_voidargs
2535 struct nfsd4_voidargs { int dummy; };
2537 static const struct svc_procedure nfsd_procedures4[2] = {
2539 .pc_func = nfsd4_proc_null,
2540 .pc_encode = nfs4svc_encode_voidres,
2541 .pc_argsize = sizeof(struct nfsd4_voidargs),
2542 .pc_ressize = sizeof(struct nfsd4_voidres),
2543 .pc_cachetype = RC_NOCACHE,
2546 [NFSPROC4_COMPOUND] = {
2547 .pc_func = nfsd4_proc_compound,
2548 .pc_decode = nfs4svc_decode_compoundargs,
2549 .pc_encode = nfs4svc_encode_compoundres,
2550 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2551 .pc_ressize = sizeof(struct nfsd4_compoundres),
2552 .pc_release = nfsd4_release_compoundargs,
2553 .pc_cachetype = RC_NOCACHE,
2554 .pc_xdrressize = NFSD_BUFSIZE/4,
2558 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2559 const struct svc_version nfsd_version4 = {
2562 .vs_proc = nfsd_procedures4,
2563 .vs_count = nfsd_count3,
2564 .vs_dispatch = nfsd_dispatch,
2565 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2566 .vs_rpcb_optnl = true,
2567 .vs_need_cong_ctrl = true,