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/falloc.h>
37 #include <linux/slab.h>
43 #include "current_stateid.h"
49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50 #include <linux/security.h>
53 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
55 struct inode *inode = d_inode(resfh->fh_dentry);
59 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
65 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
75 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
79 #define NFSDDBG_FACILITY NFSDDBG_PROC
81 static u32 nfsd_attrmask[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0,
83 NFSD_WRITEABLE_ATTRS_WORD1,
84 NFSD_WRITEABLE_ATTRS_WORD2
87 static u32 nfsd41_ex_attrmask[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
94 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
95 u32 *bmval, u32 *writable)
97 struct dentry *dentry = cstate->current_fh.fh_dentry;
100 * Check about attributes are supported by the NFSv4 server or not.
101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
106 return nfserr_attrnotsupp;
109 * Check FATTR4_WORD0_ACL can be supported
110 * in current environment or not.
112 if (bmval[0] & FATTR4_WORD0_ACL) {
113 if (!IS_POSIXACL(d_inode(dentry)))
114 return nfserr_attrnotsupp;
118 * According to spec, read-only attributes return ERR_INVAL.
121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
122 (bmval[2] & ~writable[2]))
130 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
133 __be32 status = nfs_ok;
135 if (open->op_create == NFS4_OPEN_CREATE) {
136 if (open->op_createmode == NFS4_CREATE_UNCHECKED
137 || open->op_createmode == NFS4_CREATE_GUARDED)
138 status = check_attr_support(rqstp, cstate,
139 open->op_bmval, nfsd_attrmask);
140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
141 status = check_attr_support(rqstp, cstate,
142 open->op_bmval, nfsd41_ex_attrmask);
149 is_create_with_attrs(struct nfsd4_open *open)
151 return open->op_create == NFS4_OPEN_CREATE
152 && (open->op_createmode == NFS4_CREATE_UNCHECKED
153 || open->op_createmode == NFS4_CREATE_GUARDED
154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
158 * if error occurs when setting the acl, just clear the acl bit
159 * in the returned attr bitmap.
162 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
163 struct nfs4_acl *acl, u32 *bmval)
167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
170 * We should probably fail the whole open at this point,
171 * but we've already created the file, so it's too late;
172 * So this seems the least of evils:
174 bmval[0] &= ~FATTR4_WORD0_ACL;
178 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
181 dget(src->fh_dentry);
183 exp_get(src->fh_export);
188 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
192 if (open->op_truncate &&
193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
196 accmode |= NFSD_MAY_READ_IF_EXEC;
198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
199 accmode |= NFSD_MAY_READ;
200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
202 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
203 accmode |= NFSD_MAY_WRITE;
205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
210 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
212 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
219 * Using err_symlink as our catch-all case may look odd; but
220 * there's no other obvious error for this case in 4.0, and we
221 * happen to know that it will cause the linux v4 client to do
222 * the right thing on attempts to open something other than a
225 return nfserr_symlink;
228 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
230 if (nfsd4_has_session(cstate))
232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
237 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
239 struct svc_fh *current_fh = &cstate->current_fh;
243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
245 return nfserr_jukebox;
246 fh_init(*resfh, NFS4_FHSIZE);
247 open->op_truncate = 0;
249 if (open->op_create) {
250 /* FIXME: check session persistence and pnfs flags.
251 * The nfsv4.1 spec requires the following semantics:
253 * Persistent | pNFS | Server REQUIRED | Client Allowed
254 * Reply Cache | server | |
255 * -------------+--------+-----------------+--------------------
256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
258 * | | and EXCLUSIVE4 | or EXCLUSIVE4
260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
261 * yes | no | GUARDED4 | GUARDED4
262 * yes | yes | GUARDED4 | GUARDED4
266 * Note: create modes (UNCHECKED,GUARDED...) are the same
267 * in NFSv4 as in v3 except EXCLUSIVE4_1.
269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
270 open->op_fname.len, &open->op_iattr,
271 *resfh, open->op_createmode,
272 (u32 *)open->op_verf.data,
273 &open->op_truncate, &open->op_created);
275 if (!status && open->op_label.len)
276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
279 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
280 * use the returned bitmask to indicate which attributes
281 * we used to store the verifier:
283 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
284 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
285 FATTR4_WORD1_TIME_MODIFY);
288 * Note this may exit with the parent still locked.
289 * We will hold the lock until nfsd4_open's final
290 * lookup, to prevent renames or unlinks until we've had
291 * a chance to an acquire a delegation if appropriate.
293 status = nfsd_lookup(rqstp, current_fh,
294 open->op_fname.data, open->op_fname.len, *resfh);
297 status = nfsd_check_obj_isreg(*resfh);
301 if (is_create_with_attrs(open) && open->op_acl != NULL)
302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
305 accmode = NFSD_MAY_NOP;
306 if (open->op_created ||
307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
308 accmode |= NFSD_MAY_OWNER_OVERRIDE;
309 status = do_open_permission(rqstp, *resfh, open, accmode);
310 set_change_info(&open->op_cinfo, current_fh);
316 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
318 struct svc_fh *current_fh = &cstate->current_fh;
322 /* We don't know the target directory, and therefore can not
323 * set the change info
326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
331 (open->op_iattr.ia_size == 0);
333 * In the delegation case, the client is telling us about an
334 * open that it *already* performed locally, some time ago. We
335 * should let it succeed now if possible.
337 * In the case of a CLAIM_FH open, on the other hand, the client
338 * may be counting on us to enforce permissions (the Linux 4.1
339 * client uses this for normal opens, for example).
341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
342 accmode = NFSD_MAY_OWNER_OVERRIDE;
344 status = do_open_permission(rqstp, current_fh, open, accmode);
350 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
352 struct nfsd4_sessionid *sid =
353 (struct nfsd4_sessionid *)session->se_sessionid.data;
355 clid->cl_boot = sid->clientid.cl_boot;
356 clid->cl_id = sid->clientid.cl_id;
360 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
361 struct nfsd4_open *open)
364 struct svc_fh *resfh = NULL;
365 struct net *net = SVC_NET(rqstp);
366 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
369 (int)open->op_fname.len, open->op_fname.data,
372 /* This check required by spec. */
373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
376 open->op_created = 0;
379 * Before RECLAIM_COMPLETE done, server should deny new lock
381 if (nfsd4_has_session(cstate) &&
382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
383 &cstate->session->se_client->cl_flags) &&
384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
387 if (nfsd4_has_session(cstate))
388 copy_clientid(&open->op_clientid, cstate->session);
390 /* check seqid for replay. set nfs4_owner */
391 status = nfsd4_process_open1(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 (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
420 status = nfserr_no_grace;
421 if (!opens_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, &resfh);
431 case NFS4_OPEN_CLAIM_PREVIOUS:
432 status = nfs4_check_open_reclaim(&open->op_clientid,
436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
437 case NFS4_OPEN_CLAIM_FH:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
439 status = do_open_fhandle(rqstp, cstate, open);
442 resfh = &cstate->current_fh;
444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
445 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
446 dprintk("NFSD: unsupported OPEN claim type %d\n",
447 open->op_claim_type);
448 status = nfserr_notsupp;
451 dprintk("NFSD: Invalid OPEN claim type %d\n",
452 open->op_claim_type);
453 status = nfserr_inval;
457 * nfsd4_process_open2() does the actual opening of the file. If
458 * successful, it (1) truncates the file if open->op_truncate was
459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
461 status = nfsd4_process_open2(rqstp, resfh, open);
462 WARN(status && open->op_created,
463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
464 be32_to_cpu(status));
466 if (resfh && resfh != &cstate->current_fh) {
467 fh_dup2(&cstate->current_fh, resfh);
471 nfsd4_cleanup_open_state(cstate, open);
472 nfsd4_bump_seqid(cstate, status);
477 * OPEN is the only seqid-mutating operation whose decoding can fail
478 * with a seqid-mutating error (specifically, decoding of user names in
479 * the attributes). Therefore we have to do some processing to look up
480 * the stateowner so that we can bump the seqid.
482 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
486 if (!seqid_mutating_err(ntohl(op->status)))
488 if (nfsd4_has_session(cstate))
490 open->op_xdr_error = op->status;
491 return nfsd4_open(rqstp, cstate, open);
495 * filehandle-manipulating ops.
498 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct svc_fh **getfh)
501 if (!cstate->current_fh.fh_dentry)
502 return nfserr_nofilehandle;
504 *getfh = &cstate->current_fh;
509 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
510 struct nfsd4_putfh *putfh)
512 fh_put(&cstate->current_fh);
513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
520 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
525 fh_put(&cstate->current_fh);
526 status = exp_pseudoroot(rqstp, &cstate->current_fh);
531 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
534 if (!cstate->save_fh.fh_dentry)
535 return nfserr_restorefh;
537 fh_dup2(&cstate->current_fh, &cstate->save_fh);
538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
546 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
549 if (!cstate->current_fh.fh_dentry)
550 return nfserr_nofilehandle;
552 fh_dup2(&cstate->save_fh, &cstate->current_fh);
553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
564 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
565 struct nfsd4_access *access)
567 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
570 access->ac_resp_access = access->ac_req_access;
571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
572 &access->ac_supported);
575 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
578 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
581 * This is opaque to client, so no need to byte-swap. Use
582 * __force to keep sparse happy
584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
586 memcpy(verifier->data, verf, sizeof(verifier->data));
590 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
591 struct nfsd4_commit *commit)
593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
599 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
600 struct nfsd4_create *create)
606 fh_init(&resfh, NFS4_FHSIZE);
608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
612 status = check_attr_support(rqstp, cstate, create->cr_bmval,
617 switch (create->cr_type) {
619 status = nfsd_symlink(rqstp, &cstate->current_fh,
620 create->cr_name, create->cr_namelen,
621 create->cr_data, &resfh);
625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
626 if (MAJOR(rdev) != create->cr_specdata1 ||
627 MINOR(rdev) != create->cr_specdata2)
629 status = nfsd_create(rqstp, &cstate->current_fh,
630 create->cr_name, create->cr_namelen,
631 &create->cr_iattr, S_IFBLK, rdev, &resfh);
635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
636 if (MAJOR(rdev) != create->cr_specdata1 ||
637 MINOR(rdev) != create->cr_specdata2)
639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr,S_IFCHR, rdev, &resfh);
645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFSOCK, 0, &resfh);
651 status = nfsd_create(rqstp, &cstate->current_fh,
652 create->cr_name, create->cr_namelen,
653 &create->cr_iattr, S_IFIFO, 0, &resfh);
657 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
658 status = nfsd_create(rqstp, &cstate->current_fh,
659 create->cr_name, create->cr_namelen,
660 &create->cr_iattr, S_IFDIR, 0, &resfh);
664 status = nfserr_badtype;
670 if (create->cr_label.len)
671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
673 if (create->cr_acl != NULL)
674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
677 fh_unlock(&cstate->current_fh);
678 set_change_info(&create->cr_cinfo, &cstate->current_fh);
679 fh_dup2(&cstate->current_fh, &resfh);
686 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
687 struct nfsd4_getattr *getattr)
691 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
695 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
698 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
699 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
700 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
702 getattr->ga_fhp = &cstate->current_fh;
707 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 struct nfsd4_link *link)
710 __be32 status = nfserr_nofilehandle;
712 if (!cstate->save_fh.fh_dentry)
714 status = nfsd_link(rqstp, &cstate->current_fh,
715 link->li_name, link->li_namelen, &cstate->save_fh);
717 set_change_info(&link->li_cinfo, &cstate->current_fh);
721 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
723 struct svc_fh tmp_fh;
726 fh_init(&tmp_fh, NFS4_FHSIZE);
727 ret = exp_pseudoroot(rqstp, &tmp_fh);
730 if (tmp_fh.fh_dentry == fh->fh_dentry) {
735 return nfsd_lookup(rqstp, fh, "..", 2, fh);
739 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
746 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
747 struct nfsd4_lookup *lookup)
749 return nfsd_lookup(rqstp, &cstate->current_fh,
750 lookup->lo_name, lookup->lo_len,
751 &cstate->current_fh);
755 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
756 struct nfsd4_read *read)
760 read->rd_filp = NULL;
761 if (read->rd_offset >= OFFSET_MAX)
765 * If we do a zero copy read, then a client will see read data
766 * that reflects the state of the file *after* performing the
767 * following compound.
769 * To ensure proper ordering, we therefore turn off zero copy if
770 * the client wants us to do more in this compound:
772 if (!nfsd4_last_compound_op(rqstp))
773 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
776 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
777 &read->rd_stateid, RD_STATE,
778 &read->rd_filp, &read->rd_tmp_file);
780 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
785 read->rd_rqstp = rqstp;
786 read->rd_fhp = &cstate->current_fh;
791 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
792 struct nfsd4_readdir *readdir)
794 u64 cookie = readdir->rd_cookie;
795 static const nfs4_verifier zeroverf;
797 /* no need to check permission - this will be done in nfsd_readdir() */
799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
806 if ((cookie == 1) || (cookie == 2) ||
807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
808 return nfserr_bad_cookie;
810 readdir->rd_rqstp = rqstp;
811 readdir->rd_fhp = &cstate->current_fh;
816 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
817 struct nfsd4_readlink *readlink)
819 readlink->rl_rqstp = rqstp;
820 readlink->rl_fhp = &cstate->current_fh;
825 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_remove *remove)
830 if (opens_in_grace(SVC_NET(rqstp)))
832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
833 remove->rm_name, remove->rm_namelen);
835 fh_unlock(&cstate->current_fh);
836 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
842 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
843 struct nfsd4_rename *rename)
845 __be32 status = nfserr_nofilehandle;
847 if (!cstate->save_fh.fh_dentry)
849 if (opens_in_grace(SVC_NET(rqstp)) &&
850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
853 rename->rn_snamelen, &cstate->current_fh,
854 rename->rn_tname, rename->rn_tnamelen);
857 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
858 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
863 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 struct nfsd4_secinfo *secinfo)
866 struct svc_export *exp;
867 struct dentry *dentry;
870 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
873 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
874 secinfo->si_name, secinfo->si_namelen,
878 fh_unlock(&cstate->current_fh);
879 if (d_really_is_negative(dentry)) {
883 secinfo->si_exp = exp;
885 if (cstate->minorversion)
886 /* See rfc 5661 section 2.6.3.1.1.8 */
887 fh_put(&cstate->current_fh);
892 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
893 struct nfsd4_secinfo_no_name *sin)
897 switch (sin->sin_style) {
898 case NFS4_SECINFO_STYLE4_CURRENT_FH:
900 case NFS4_SECINFO_STYLE4_PARENT:
901 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
909 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
910 fh_put(&cstate->current_fh);
915 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
916 struct nfsd4_setattr *setattr)
918 __be32 status = nfs_ok;
921 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
922 status = nfs4_preprocess_stateid_op(rqstp, cstate,
923 &cstate->current_fh, &setattr->sa_stateid,
924 WR_STATE, NULL, NULL);
926 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
930 err = fh_want_write(&cstate->current_fh);
932 return nfserrno(err);
935 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
940 if (setattr->sa_acl != NULL)
941 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
945 if (setattr->sa_label.len)
946 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
950 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
953 fh_drop_write(&cstate->current_fh);
957 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
960 int buflen = write->wr_buflen;
962 vec[0].iov_base = write->wr_head.iov_base;
963 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
964 buflen -= vec[0].iov_len;
967 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
968 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
969 buflen -= vec[i].iov_len;
976 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
977 struct nfsd4_write *write)
979 stateid_t *stateid = &write->wr_stateid;
980 struct file *filp = NULL;
981 __be32 status = nfs_ok;
985 if (write->wr_offset > (u64)OFFSET_MAX ||
986 write->wr_offset + write->wr_buflen > (u64)OFFSET_MAX)
989 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
990 stateid, WR_STATE, &filp, NULL);
992 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
996 cnt = write->wr_buflen;
997 write->wr_how_written = write->wr_stable_how;
998 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1000 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1001 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1003 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1004 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1005 &write->wr_how_written);
1008 write->wr_bytes_written = cnt;
1014 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1015 stateid_t *src_stateid, struct file **src,
1016 stateid_t *dst_stateid, struct file **dst)
1020 if (!cstate->save_fh.fh_dentry)
1021 return nfserr_nofilehandle;
1023 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1024 src_stateid, RD_STATE, src, NULL);
1026 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1030 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1031 dst_stateid, WR_STATE, dst, NULL);
1033 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1037 /* fix up for NFS-specific error code */
1038 if (!S_ISREG(file_inode(*src)->i_mode) ||
1039 !S_ISREG(file_inode(*dst)->i_mode)) {
1040 status = nfserr_wrong_type;
1054 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1055 struct nfsd4_clone *clone)
1057 struct file *src, *dst;
1060 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1061 &clone->cl_dst_stateid, &dst);
1065 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1066 dst, clone->cl_dst_pos, clone->cl_count);
1075 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1076 struct nfsd4_copy *copy)
1078 struct file *src, *dst;
1082 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1083 ©->cp_dst_stateid, &dst);
1087 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1088 dst, copy->cp_dst_pos, copy->cp_count);
1091 status = nfserrno(bytes);
1093 copy->cp_res.wr_bytes_written = bytes;
1094 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1095 copy->cp_consecutive = 1;
1096 copy->cp_synchronous = 1;
1097 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1108 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1109 struct nfsd4_fallocate *fallocate, int flags)
1111 __be32 status = nfserr_notsupp;
1114 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1115 &fallocate->falloc_stateid,
1116 WR_STATE, &file, NULL);
1117 if (status != nfs_ok) {
1118 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1122 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1123 fallocate->falloc_offset,
1124 fallocate->falloc_length,
1131 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1132 struct nfsd4_fallocate *fallocate)
1134 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1138 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1139 struct nfsd4_fallocate *fallocate)
1141 return nfsd4_fallocate(rqstp, cstate, fallocate,
1142 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1146 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1147 struct nfsd4_seek *seek)
1153 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1154 &seek->seek_stateid,
1155 RD_STATE, &file, NULL);
1157 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1161 switch (seek->seek_whence) {
1162 case NFS4_CONTENT_DATA:
1165 case NFS4_CONTENT_HOLE:
1169 status = nfserr_union_notsupp;
1174 * Note: This call does change file->f_pos, but nothing in NFSD
1175 * should ever file->f_pos.
1177 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1178 if (seek->seek_pos < 0)
1179 status = nfserrno(seek->seek_pos);
1180 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1181 seek->seek_eof = true;
1188 /* This routine never returns NFS_OK! If there are no other errors, it
1189 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1190 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1191 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1194 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1195 struct nfsd4_verify *verify)
1201 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1205 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1209 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1210 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1211 return nfserr_inval;
1212 if (verify->ve_attrlen & 3)
1213 return nfserr_inval;
1216 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1218 count = 4 + (verify->ve_attrlen >> 2);
1219 buf = kmalloc(count << 2, GFP_KERNEL);
1221 return nfserr_jukebox;
1224 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1225 cstate->current_fh.fh_export,
1226 cstate->current_fh.fh_dentry,
1230 * If nfsd4_encode_fattr() ran out of space, assume that's because
1231 * the attributes are longer (hence different) than those given:
1233 if (status == nfserr_resource)
1234 status = nfserr_not_same;
1239 p = buf + 1 + ntohl(buf[0]);
1240 status = nfserr_not_same;
1241 if (ntohl(*p++) != verify->ve_attrlen)
1243 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1244 status = nfserr_same;
1252 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1253 struct nfsd4_verify *verify)
1257 status = _nfsd4_verify(rqstp, cstate, verify);
1258 return status == nfserr_not_same ? nfs_ok : status;
1262 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1263 struct nfsd4_verify *verify)
1267 status = _nfsd4_verify(rqstp, cstate, verify);
1268 return status == nfserr_same ? nfs_ok : status;
1271 #ifdef CONFIG_NFSD_PNFS
1272 static const struct nfsd4_layout_ops *
1273 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1275 if (!exp->ex_layout_types) {
1276 dprintk("%s: export does not support pNFS\n", __func__);
1280 if (layout_type >= LAYOUT_TYPE_MAX ||
1281 !(exp->ex_layout_types & (1 << layout_type))) {
1282 dprintk("%s: layout type %d not supported\n",
1283 __func__, layout_type);
1287 return nfsd4_layout_ops[layout_type];
1291 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1292 struct nfsd4_compound_state *cstate,
1293 struct nfsd4_getdeviceinfo *gdp)
1295 const struct nfsd4_layout_ops *ops;
1296 struct nfsd4_deviceid_map *map;
1297 struct svc_export *exp;
1300 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1302 gdp->gd_layout_type,
1303 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1306 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1308 dprintk("%s: couldn't find device ID to export mapping!\n",
1310 return nfserr_noent;
1313 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1315 dprintk("%s: could not find device id\n", __func__);
1316 return nfserr_noent;
1319 nfserr = nfserr_layoutunavailable;
1320 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1325 if (gdp->gd_maxcount != 0) {
1326 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1327 rqstp, cstate->session->se_client, gdp);
1330 gdp->gd_notify_types &= ops->notify_types;
1337 nfsd4_layoutget(struct svc_rqst *rqstp,
1338 struct nfsd4_compound_state *cstate,
1339 struct nfsd4_layoutget *lgp)
1341 struct svc_fh *current_fh = &cstate->current_fh;
1342 const struct nfsd4_layout_ops *ops;
1343 struct nfs4_layout_stateid *ls;
1345 int accmode = NFSD_MAY_READ_IF_EXEC;
1347 switch (lgp->lg_seg.iomode) {
1349 accmode |= NFSD_MAY_READ;
1352 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1355 dprintk("%s: invalid iomode %d\n",
1356 __func__, lgp->lg_seg.iomode);
1357 nfserr = nfserr_badiomode;
1361 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1365 nfserr = nfserr_layoutunavailable;
1366 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1371 * Verify minlength and range as per RFC5661:
1372 * o If loga_length is less than loga_minlength,
1373 * the metadata server MUST return NFS4ERR_INVAL.
1374 * o If the sum of loga_offset and loga_minlength exceeds
1375 * NFS4_UINT64_MAX, and loga_minlength is not
1376 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1377 * o If the sum of loga_offset and loga_length exceeds
1378 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1379 * the error NFS4ERR_INVAL MUST result.
1381 nfserr = nfserr_inval;
1382 if (lgp->lg_seg.length < lgp->lg_minlength ||
1383 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1384 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1385 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1386 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1388 if (lgp->lg_seg.length == 0)
1391 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1392 true, lgp->lg_layout_type, &ls);
1394 trace_layout_get_lookup_fail(&lgp->lg_sid);
1398 nfserr = nfserr_recallconflict;
1399 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1402 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1407 nfserr = nfsd4_insert_layout(lgp, ls);
1410 mutex_unlock(&ls->ls_mutex);
1411 nfs4_put_stid(&ls->ls_stid);
1417 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1418 struct nfsd4_compound_state *cstate,
1419 struct nfsd4_layoutcommit *lcp)
1421 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1422 struct svc_fh *current_fh = &cstate->current_fh;
1423 const struct nfsd4_layout_ops *ops;
1424 loff_t new_size = lcp->lc_last_wr + 1;
1425 struct inode *inode;
1426 struct nfs4_layout_stateid *ls;
1429 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1433 nfserr = nfserr_layoutunavailable;
1434 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1437 inode = d_inode(current_fh->fh_dentry);
1439 nfserr = nfserr_inval;
1440 if (new_size <= seg->offset) {
1441 dprintk("pnfsd: last write before layout segment\n");
1444 if (new_size > seg->offset + seg->length) {
1445 dprintk("pnfsd: last write beyond layout segment\n");
1448 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1449 dprintk("pnfsd: layoutcommit beyond EOF\n");
1453 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1454 false, lcp->lc_layout_type,
1457 trace_layout_commit_lookup_fail(&lcp->lc_sid);
1458 /* fixup error code as per RFC5661 */
1459 if (nfserr == nfserr_bad_stateid)
1460 nfserr = nfserr_badlayout;
1464 /* LAYOUTCOMMIT does not require any serialization */
1465 mutex_unlock(&ls->ls_mutex);
1467 if (new_size > i_size_read(inode)) {
1468 lcp->lc_size_chg = 1;
1469 lcp->lc_newsize = new_size;
1471 lcp->lc_size_chg = 0;
1474 nfserr = ops->proc_layoutcommit(inode, lcp);
1475 nfs4_put_stid(&ls->ls_stid);
1481 nfsd4_layoutreturn(struct svc_rqst *rqstp,
1482 struct nfsd4_compound_state *cstate,
1483 struct nfsd4_layoutreturn *lrp)
1485 struct svc_fh *current_fh = &cstate->current_fh;
1488 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1492 nfserr = nfserr_layoutunavailable;
1493 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1496 switch (lrp->lr_seg.iomode) {
1502 dprintk("%s: invalid iomode %d\n", __func__,
1503 lrp->lr_seg.iomode);
1504 nfserr = nfserr_inval;
1508 switch (lrp->lr_return_type) {
1510 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1514 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1517 dprintk("%s: invalid return_type %d\n", __func__,
1518 lrp->lr_return_type);
1519 nfserr = nfserr_inval;
1525 #endif /* CONFIG_NFSD_PNFS */
1531 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1536 static inline void nfsd4_increment_op_stats(u32 opnum)
1538 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1539 nfsdstats.nfs4_opcount[opnum]++;
1542 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1544 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1545 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1546 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1548 enum nfsd4_op_flags {
1549 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1550 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1551 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1552 /* For rfc 5661 section 2.6.3.1.1: */
1553 OP_HANDLES_WRONGSEC = 1 << 3,
1554 OP_IS_PUTFH_LIKE = 1 << 4,
1556 * These are the ops whose result size we estimate before
1557 * encoding, to avoid performing an op then not being able to
1558 * respond or cache a response. This includes writes and setattrs
1559 * as well as the operations usually called "nonidempotent":
1561 OP_MODIFIES_SOMETHING = 1 << 5,
1563 * Cache compounds containing these ops in the xid-based drc:
1564 * We use the DRC for compounds containing non-idempotent
1565 * operations, *except* those that are 4.1-specific (since
1566 * sessions provide their own EOS), and except for stateful
1567 * operations other than setclientid and setclientid_confirm
1568 * (since sequence numbers provide EOS for open, lock, etc in
1571 OP_CACHEME = 1 << 6,
1573 * These are ops which clear current state id.
1575 OP_CLEAR_STATEID = 1 << 7,
1578 struct nfsd4_operation {
1579 nfsd4op_func op_func;
1582 /* Try to get response size before operation */
1583 nfsd4op_rsize op_rsize_bop;
1584 stateid_getter op_get_currentstateid;
1585 stateid_setter op_set_currentstateid;
1588 static struct nfsd4_operation nfsd4_ops[];
1590 static const char *nfsd4_op_name(unsigned opnum);
1593 * Enforce NFSv4.1 COMPOUND ordering rules:
1595 * Also note, enforced elsewhere:
1596 * - SEQUENCE other than as first op results in
1597 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1598 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1599 * (Enforced in nfsd4_bind_conn_to_session().)
1600 * - DESTROY_SESSION must be the final operation in a compound, if
1601 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1602 * (Enforced in nfsd4_destroy_session().)
1604 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1606 struct nfsd4_op *op = &args->ops[0];
1608 /* These ordering requirements don't apply to NFSv4.0: */
1609 if (args->minorversion == 0)
1611 /* This is weird, but OK, not our problem: */
1612 if (args->opcnt == 0)
1614 if (op->status == nfserr_op_illegal)
1616 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1617 return nfserr_op_not_in_session;
1618 if (op->opnum == OP_SEQUENCE)
1620 if (args->opcnt != 1)
1621 return nfserr_not_only_op;
1625 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1627 return &nfsd4_ops[op->opnum];
1630 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1632 if (op->opnum == OP_ILLEGAL)
1634 return OPDESC(op)->op_flags & OP_CACHEME;
1637 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1639 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1640 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1641 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1642 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1643 struct nfsd4_operation *thisd;
1644 struct nfsd4_operation *nextd;
1646 thisd = OPDESC(this);
1648 * Most ops check wronsec on our own; only the putfh-like ops
1649 * have special rules.
1651 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1654 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1655 * put-filehandle operation if we're not going to use the
1658 if (argp->opcnt == resp->opcnt)
1660 if (next->opnum == OP_ILLEGAL)
1662 nextd = OPDESC(next);
1664 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1665 * errors themselves as necessary; others should check for them
1668 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1671 static void svcxdr_init_encode(struct svc_rqst *rqstp,
1672 struct nfsd4_compoundres *resp)
1674 struct xdr_stream *xdr = &resp->xdr;
1675 struct xdr_buf *buf = &rqstp->rq_res;
1676 struct kvec *head = buf->head;
1680 xdr->p = head->iov_base + head->iov_len;
1681 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1682 /* Tail and page_len should be zero at this point: */
1683 buf->len = buf->head[0].iov_len;
1684 xdr->scratch.iov_len = 0;
1685 xdr->page_ptr = buf->pages - 1;
1686 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1687 - rqstp->rq_auth_slack;
1694 nfsd4_proc_compound(struct svc_rqst *rqstp,
1695 struct nfsd4_compoundargs *args,
1696 struct nfsd4_compoundres *resp)
1698 struct nfsd4_op *op;
1699 struct nfsd4_operation *opdesc;
1700 struct nfsd4_compound_state *cstate = &resp->cstate;
1701 struct svc_fh *current_fh = &cstate->current_fh;
1702 struct svc_fh *save_fh = &cstate->save_fh;
1705 svcxdr_init_encode(rqstp, resp);
1706 resp->tagp = resp->xdr.p;
1707 /* reserve space for: taglen, tag, and opcnt */
1708 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1709 resp->taglen = args->taglen;
1710 resp->tag = args->tag;
1711 resp->rqstp = rqstp;
1712 cstate->minorversion = args->minorversion;
1713 fh_init(current_fh, NFS4_FHSIZE);
1714 fh_init(save_fh, NFS4_FHSIZE);
1716 * Don't use the deferral mechanism for NFSv4; compounds make it
1717 * too hard to avoid non-idempotency problems.
1719 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1722 * According to RFC3010, this takes precedence over all other errors.
1724 status = nfserr_minor_vers_mismatch;
1725 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1728 status = nfs41_check_op_ordering(args);
1731 op->status = status;
1736 while (!status && resp->opcnt < args->opcnt) {
1737 op = &args->ops[resp->opcnt++];
1739 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1740 resp->opcnt, args->opcnt, op->opnum,
1741 nfsd4_op_name(op->opnum));
1743 * The XDR decode routines may have pre-set op->status;
1744 * for example, if there is a miscellaneous XDR error
1745 * it will be set to nfserr_bad_xdr.
1748 if (op->opnum == OP_OPEN)
1749 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1753 opdesc = OPDESC(op);
1755 if (!current_fh->fh_dentry) {
1756 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1757 op->status = nfserr_nofilehandle;
1760 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1761 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1762 op->status = nfserr_moved;
1766 fh_clear_wcc(current_fh);
1768 /* If op is non-idempotent */
1769 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1771 * Don't execute this op if we couldn't encode a
1774 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1776 * Plus if there's another operation, make sure
1777 * we'll have space to at least encode an error:
1779 if (resp->opcnt < args->opcnt)
1780 plen += COMPOUND_ERR_SLACK_SPACE;
1781 op->status = nfsd4_check_resp_size(resp, plen);
1787 if (opdesc->op_get_currentstateid)
1788 opdesc->op_get_currentstateid(cstate, &op->u);
1789 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1791 /* Only from SEQUENCE */
1792 if (cstate->status == nfserr_replay_cache) {
1793 dprintk("%s NFS4.1 replay from cache\n", __func__);
1794 status = op->status;
1798 if (opdesc->op_set_currentstateid)
1799 opdesc->op_set_currentstateid(cstate, &op->u);
1801 if (opdesc->op_flags & OP_CLEAR_STATEID)
1802 clear_current_stateid(cstate);
1804 if (need_wrongsec_check(rqstp))
1805 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1808 if (op->status == nfserr_replay_me) {
1809 op->replay = &cstate->replay_owner->so_replay;
1810 nfsd4_encode_replay(&resp->xdr, op);
1811 status = op->status = op->replay->rp_status;
1813 nfsd4_encode_operation(resp, op);
1814 status = op->status;
1817 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1818 args->ops, args->opcnt, resp->opcnt, op->opnum,
1819 be32_to_cpu(status));
1821 nfsd4_cstate_clear_replay(cstate);
1822 nfsd4_increment_op_stats(op->opnum);
1825 cstate->status = status;
1828 BUG_ON(cstate->replay_owner);
1830 /* Reset deferral mechanism for RPC deferrals */
1831 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1832 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1836 #define op_encode_hdr_size (2)
1837 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1838 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1839 #define op_encode_change_info_maxsz (5)
1840 #define nfs4_fattr_bitmap_maxsz (4)
1842 /* We'll fall back on returning no lockowner if run out of space: */
1843 #define op_encode_lockowner_maxsz (0)
1844 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1846 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1848 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1849 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1850 op_encode_ace_maxsz)
1852 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1854 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1856 return (op_encode_hdr_size) * sizeof(__be32);
1859 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1861 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1864 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1866 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1869 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1871 return (op_encode_hdr_size + op_encode_change_info_maxsz
1872 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1876 * Note since this is an idempotent operation we won't insist on failing
1877 * the op prematurely if the estimate is too large. We may turn off splice
1878 * reads unnecessarily.
1880 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1881 struct nfsd4_op *op)
1883 u32 *bmap = op->u.getattr.ga_bmval;
1884 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1887 if (bmap0 & FATTR4_WORD0_ACL)
1888 return svc_max_payload(rqstp);
1889 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1890 return svc_max_payload(rqstp);
1892 if (bmap1 & FATTR4_WORD1_OWNER) {
1893 ret += IDMAP_NAMESZ + 4;
1894 bmap1 &= ~FATTR4_WORD1_OWNER;
1896 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1897 ret += IDMAP_NAMESZ + 4;
1898 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1900 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1901 ret += NFS4_FHSIZE + 4;
1902 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1904 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1905 ret += NFS4_MAXLABELLEN + 12;
1906 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1909 * Largest of remaining attributes are 16 bytes (e.g.,
1910 * supported_attributes)
1912 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1913 /* bitmask, length */
1918 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1920 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1924 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1926 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1930 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1932 return (op_encode_hdr_size + op_encode_stateid_maxsz
1933 + op_encode_change_info_maxsz + 1
1934 + nfs4_fattr_bitmap_maxsz
1935 + op_encode_delegation_maxsz) * sizeof(__be32);
1938 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1940 u32 maxcount = 0, rlen = 0;
1942 maxcount = svc_max_payload(rqstp);
1943 rlen = min(op->u.read.rd_length, maxcount);
1945 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1948 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1950 u32 maxcount = 0, rlen = 0;
1952 maxcount = svc_max_payload(rqstp);
1953 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1955 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1956 XDR_QUADLEN(rlen)) * sizeof(__be32);
1959 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1965 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1967 return (op_encode_hdr_size + op_encode_change_info_maxsz
1968 + op_encode_change_info_maxsz) * sizeof(__be32);
1971 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1972 struct nfsd4_op *op)
1974 return (op_encode_hdr_size
1975 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1978 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1980 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1983 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1985 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1989 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1991 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
1994 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1996 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1997 1 + 1 + /* eir_flags, spr_how */\
1998 4 + /* spo_must_enforce & _allow with bitmap */\
1999 2 + /*eir_server_owner.so_minor_id */\
2000 /* eir_server_owner.so_major_id<> */\
2001 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2002 /* eir_server_scope<> */\
2003 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2004 1 + /* eir_server_impl_id array length */\
2005 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2008 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2010 return (op_encode_hdr_size + \
2011 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2012 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2015 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2017 return (op_encode_hdr_size + \
2018 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2019 2 + /* csr_sequence, csr_flags */\
2020 op_encode_channel_attrs_maxsz + \
2021 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2024 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2026 return (op_encode_hdr_size +
2027 1 /* wr_callback */ +
2028 op_encode_stateid_maxsz /* wr_callback */ +
2030 1 /* wr_committed */ +
2031 op_encode_verifier_maxsz +
2032 1 /* cr_consecutive */ +
2033 1 /* cr_synchronous */) * sizeof(__be32);
2036 #ifdef CONFIG_NFSD_PNFS
2038 * At this stage we don't really know what layout driver will handle the request,
2039 * so we need to define an arbitrary upper bound here.
2041 #define MAX_LAYOUT_SIZE 128
2042 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2044 return (op_encode_hdr_size +
2045 1 /* logr_return_on_close */ +
2046 op_encode_stateid_maxsz +
2047 1 /* nr of layouts */ +
2048 MAX_LAYOUT_SIZE) * sizeof(__be32);
2051 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2053 return (op_encode_hdr_size +
2054 1 /* locr_newsize */ +
2055 2 /* ns_size */) * sizeof(__be32);
2058 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2060 return (op_encode_hdr_size +
2061 1 /* lrs_stateid */ +
2062 op_encode_stateid_maxsz) * sizeof(__be32);
2064 #endif /* CONFIG_NFSD_PNFS */
2066 static struct nfsd4_operation nfsd4_ops[] = {
2068 .op_func = (nfsd4op_func)nfsd4_access,
2069 .op_name = "OP_ACCESS",
2072 .op_func = (nfsd4op_func)nfsd4_close,
2073 .op_flags = OP_MODIFIES_SOMETHING,
2074 .op_name = "OP_CLOSE",
2075 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2076 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2077 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
2080 .op_func = (nfsd4op_func)nfsd4_commit,
2081 .op_flags = OP_MODIFIES_SOMETHING,
2082 .op_name = "OP_COMMIT",
2083 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
2086 .op_func = (nfsd4op_func)nfsd4_create,
2087 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2088 .op_name = "OP_CREATE",
2089 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
2091 [OP_DELEGRETURN] = {
2092 .op_func = (nfsd4op_func)nfsd4_delegreturn,
2093 .op_flags = OP_MODIFIES_SOMETHING,
2094 .op_name = "OP_DELEGRETURN",
2095 .op_rsize_bop = nfsd4_only_status_rsize,
2096 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
2099 .op_func = (nfsd4op_func)nfsd4_getattr,
2100 .op_flags = ALLOWED_ON_ABSENT_FS,
2101 .op_rsize_bop = nfsd4_getattr_rsize,
2102 .op_name = "OP_GETATTR",
2105 .op_func = (nfsd4op_func)nfsd4_getfh,
2106 .op_name = "OP_GETFH",
2109 .op_func = (nfsd4op_func)nfsd4_link,
2110 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2112 .op_name = "OP_LINK",
2113 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
2116 .op_func = (nfsd4op_func)nfsd4_lock,
2117 .op_flags = OP_MODIFIES_SOMETHING,
2118 .op_name = "OP_LOCK",
2119 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
2120 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
2123 .op_func = (nfsd4op_func)nfsd4_lockt,
2124 .op_name = "OP_LOCKT",
2127 .op_func = (nfsd4op_func)nfsd4_locku,
2128 .op_flags = OP_MODIFIES_SOMETHING,
2129 .op_name = "OP_LOCKU",
2130 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2131 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
2134 .op_func = (nfsd4op_func)nfsd4_lookup,
2135 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2136 .op_name = "OP_LOOKUP",
2139 .op_func = (nfsd4op_func)nfsd4_lookupp,
2140 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2141 .op_name = "OP_LOOKUPP",
2144 .op_func = (nfsd4op_func)nfsd4_nverify,
2145 .op_name = "OP_NVERIFY",
2148 .op_func = (nfsd4op_func)nfsd4_open,
2149 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2150 .op_name = "OP_OPEN",
2151 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
2152 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
2154 [OP_OPEN_CONFIRM] = {
2155 .op_func = (nfsd4op_func)nfsd4_open_confirm,
2156 .op_flags = OP_MODIFIES_SOMETHING,
2157 .op_name = "OP_OPEN_CONFIRM",
2158 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2160 [OP_OPEN_DOWNGRADE] = {
2161 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
2162 .op_flags = OP_MODIFIES_SOMETHING,
2163 .op_name = "OP_OPEN_DOWNGRADE",
2164 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
2165 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2166 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
2169 .op_func = (nfsd4op_func)nfsd4_putfh,
2170 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2171 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2172 .op_name = "OP_PUTFH",
2173 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2176 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2177 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2178 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2179 .op_name = "OP_PUTPUBFH",
2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2183 .op_func = (nfsd4op_func)nfsd4_putrootfh,
2184 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2185 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2186 .op_name = "OP_PUTROOTFH",
2187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2190 .op_func = (nfsd4op_func)nfsd4_read,
2191 .op_name = "OP_READ",
2192 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
2193 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
2196 .op_func = (nfsd4op_func)nfsd4_readdir,
2197 .op_name = "OP_READDIR",
2198 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
2201 .op_func = (nfsd4op_func)nfsd4_readlink,
2202 .op_name = "OP_READLINK",
2205 .op_func = (nfsd4op_func)nfsd4_remove,
2206 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2207 .op_name = "OP_REMOVE",
2208 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
2211 .op_func = (nfsd4op_func)nfsd4_rename,
2212 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2213 .op_name = "OP_RENAME",
2214 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
2217 .op_func = (nfsd4op_func)nfsd4_renew,
2218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2219 | OP_MODIFIES_SOMETHING,
2220 .op_name = "OP_RENEW",
2221 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2225 .op_func = (nfsd4op_func)nfsd4_restorefh,
2226 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2227 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2228 .op_name = "OP_RESTOREFH",
2229 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2232 .op_func = (nfsd4op_func)nfsd4_savefh,
2233 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2234 .op_name = "OP_SAVEFH",
2235 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2238 .op_func = (nfsd4op_func)nfsd4_secinfo,
2239 .op_flags = OP_HANDLES_WRONGSEC,
2240 .op_name = "OP_SECINFO",
2243 .op_func = (nfsd4op_func)nfsd4_setattr,
2244 .op_name = "OP_SETATTR",
2245 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2246 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
2247 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
2249 [OP_SETCLIENTID] = {
2250 .op_func = (nfsd4op_func)nfsd4_setclientid,
2251 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2252 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2253 .op_name = "OP_SETCLIENTID",
2254 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
2256 [OP_SETCLIENTID_CONFIRM] = {
2257 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
2258 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2259 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2260 .op_name = "OP_SETCLIENTID_CONFIRM",
2261 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2264 .op_func = (nfsd4op_func)nfsd4_verify,
2265 .op_name = "OP_VERIFY",
2268 .op_func = (nfsd4op_func)nfsd4_write,
2269 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2270 .op_name = "OP_WRITE",
2271 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2272 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
2274 [OP_RELEASE_LOCKOWNER] = {
2275 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
2276 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2277 | OP_MODIFIES_SOMETHING,
2278 .op_name = "OP_RELEASE_LOCKOWNER",
2279 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2282 /* NFSv4.1 operations */
2283 [OP_EXCHANGE_ID] = {
2284 .op_func = (nfsd4op_func)nfsd4_exchange_id,
2285 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2286 | OP_MODIFIES_SOMETHING,
2287 .op_name = "OP_EXCHANGE_ID",
2288 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
2290 [OP_BACKCHANNEL_CTL] = {
2291 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2292 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2293 .op_name = "OP_BACKCHANNEL_CTL",
2294 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2296 [OP_BIND_CONN_TO_SESSION] = {
2297 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
2298 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2299 | OP_MODIFIES_SOMETHING,
2300 .op_name = "OP_BIND_CONN_TO_SESSION",
2301 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
2303 [OP_CREATE_SESSION] = {
2304 .op_func = (nfsd4op_func)nfsd4_create_session,
2305 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2306 | OP_MODIFIES_SOMETHING,
2307 .op_name = "OP_CREATE_SESSION",
2308 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
2310 [OP_DESTROY_SESSION] = {
2311 .op_func = (nfsd4op_func)nfsd4_destroy_session,
2312 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2313 | OP_MODIFIES_SOMETHING,
2314 .op_name = "OP_DESTROY_SESSION",
2315 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2318 .op_func = (nfsd4op_func)nfsd4_sequence,
2319 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2320 .op_name = "OP_SEQUENCE",
2321 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
2323 [OP_DESTROY_CLIENTID] = {
2324 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
2325 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2326 | OP_MODIFIES_SOMETHING,
2327 .op_name = "OP_DESTROY_CLIENTID",
2328 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2330 [OP_RECLAIM_COMPLETE] = {
2331 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
2332 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2333 .op_name = "OP_RECLAIM_COMPLETE",
2334 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2336 [OP_SECINFO_NO_NAME] = {
2337 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
2338 .op_flags = OP_HANDLES_WRONGSEC,
2339 .op_name = "OP_SECINFO_NO_NAME",
2341 [OP_TEST_STATEID] = {
2342 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2343 .op_flags = ALLOWED_WITHOUT_FH,
2344 .op_name = "OP_TEST_STATEID",
2346 [OP_FREE_STATEID] = {
2347 .op_func = (nfsd4op_func)nfsd4_free_stateid,
2348 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2349 .op_name = "OP_FREE_STATEID",
2350 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
2351 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2353 #ifdef CONFIG_NFSD_PNFS
2354 [OP_GETDEVICEINFO] = {
2355 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2356 .op_flags = ALLOWED_WITHOUT_FH,
2357 .op_name = "OP_GETDEVICEINFO",
2360 .op_func = (nfsd4op_func)nfsd4_layoutget,
2361 .op_flags = OP_MODIFIES_SOMETHING,
2362 .op_name = "OP_LAYOUTGET",
2363 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2365 [OP_LAYOUTCOMMIT] = {
2366 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2367 .op_flags = OP_MODIFIES_SOMETHING,
2368 .op_name = "OP_LAYOUTCOMMIT",
2369 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2371 [OP_LAYOUTRETURN] = {
2372 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2373 .op_flags = OP_MODIFIES_SOMETHING,
2374 .op_name = "OP_LAYOUTRETURN",
2375 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2377 #endif /* CONFIG_NFSD_PNFS */
2379 /* NFSv4.2 operations */
2381 .op_func = (nfsd4op_func)nfsd4_allocate,
2382 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2383 .op_name = "OP_ALLOCATE",
2384 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2387 .op_func = (nfsd4op_func)nfsd4_deallocate,
2388 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2389 .op_name = "OP_DEALLOCATE",
2390 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2393 .op_func = (nfsd4op_func)nfsd4_clone,
2394 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2395 .op_name = "OP_CLONE",
2396 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2399 .op_func = (nfsd4op_func)nfsd4_copy,
2400 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2401 .op_name = "OP_COPY",
2402 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2405 .op_func = (nfsd4op_func)nfsd4_seek,
2406 .op_name = "OP_SEEK",
2411 * nfsd4_spo_must_allow - Determine if the compound op contains an
2412 * operation that is allowed to be sent with machine credentials
2414 * @rqstp: a pointer to the struct svc_rqst
2416 * Checks to see if the compound contains a spo_must_allow op
2417 * and confirms that it was sent with the proper machine creds.
2420 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2422 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2423 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2424 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2425 struct nfsd4_compound_state *cstate = &resp->cstate;
2426 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2429 if (!cstate->minorversion)
2432 if (cstate->spo_must_allowed == true)
2435 opiter = resp->opcnt;
2436 while (opiter < argp->opcnt) {
2437 this = &argp->ops[opiter++];
2438 if (test_bit(this->opnum, allow->u.longs) &&
2439 cstate->clp->cl_mach_cred &&
2440 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2441 cstate->spo_must_allowed = true;
2445 cstate->spo_must_allowed = false;
2449 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2451 struct nfsd4_operation *opdesc;
2452 nfsd4op_rsize estimator;
2454 if (op->opnum == OP_ILLEGAL)
2455 return op_encode_hdr_size * sizeof(__be32);
2456 opdesc = OPDESC(op);
2457 estimator = opdesc->op_rsize_bop;
2458 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2461 void warn_on_nonidempotent_op(struct nfsd4_op *op)
2463 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2464 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2465 op->opnum, nfsd4_op_name(op->opnum));
2470 static const char *nfsd4_op_name(unsigned opnum)
2472 if (opnum < ARRAY_SIZE(nfsd4_ops))
2473 return nfsd4_ops[opnum].op_name;
2474 return "unknown_operation";
2477 #define nfsd4_voidres nfsd4_voidargs
2478 struct nfsd4_voidargs { int dummy; };
2480 static struct svc_procedure nfsd_procedures4[2] = {
2482 .pc_func = (svc_procfunc) nfsd4_proc_null,
2483 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2484 .pc_argsize = sizeof(struct nfsd4_voidargs),
2485 .pc_ressize = sizeof(struct nfsd4_voidres),
2486 .pc_cachetype = RC_NOCACHE,
2489 [NFSPROC4_COMPOUND] = {
2490 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2491 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2492 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2493 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2494 .pc_ressize = sizeof(struct nfsd4_compoundres),
2495 .pc_release = nfsd4_release_compoundargs,
2496 .pc_cachetype = RC_NOCACHE,
2497 .pc_xdrressize = NFSD_BUFSIZE/4,
2501 struct svc_version nfsd_version4 = {
2504 .vs_proc = nfsd_procedures4,
2505 .vs_dispatch = nfsd_dispatch,
2506 .vs_xdrsize = NFS4_SVC_XDRSIZE,