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>
39 #include <linux/kthread.h>
40 #include <linux/sunrpc/addr.h>
41 #include <linux/nfs_ssc.h>
47 #include "current_stateid.h"
53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54 #include <linux/security.h>
57 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
59 struct inode *inode = d_inode(resfh->fh_dentry);
63 status = security_inode_setsecctx(resfh->fh_dentry,
64 label->data, label->len);
69 * XXX: We should really fail the whole open, but we may
70 * already have created a new file, so it may be too
71 * late. For now this seems the least of evils:
73 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
79 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
83 #define NFSDDBG_FACILITY NFSDDBG_PROC
85 static u32 nfsd_attrmask[] = {
86 NFSD_WRITEABLE_ATTRS_WORD0,
87 NFSD_WRITEABLE_ATTRS_WORD1,
88 NFSD_WRITEABLE_ATTRS_WORD2
91 static u32 nfsd41_ex_attrmask[] = {
92 NFSD_SUPPATTR_EXCLCREAT_WORD0,
93 NFSD_SUPPATTR_EXCLCREAT_WORD1,
94 NFSD_SUPPATTR_EXCLCREAT_WORD2
98 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
99 u32 *bmval, u32 *writable)
101 struct dentry *dentry = cstate->current_fh.fh_dentry;
102 struct svc_export *exp = cstate->current_fh.fh_export;
104 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
105 return nfserr_attrnotsupp;
106 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
107 return nfserr_attrnotsupp;
108 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
109 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
110 return nfserr_attrnotsupp;
111 if (writable && !bmval_is_subset(bmval, writable))
113 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
114 (bmval[1] & FATTR4_WORD1_MODE))
120 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
121 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
123 __be32 status = nfs_ok;
125 if (open->op_create == NFS4_OPEN_CREATE) {
126 if (open->op_createmode == NFS4_CREATE_UNCHECKED
127 || open->op_createmode == NFS4_CREATE_GUARDED)
128 status = check_attr_support(rqstp, cstate,
129 open->op_bmval, nfsd_attrmask);
130 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
131 status = check_attr_support(rqstp, cstate,
132 open->op_bmval, nfsd41_ex_attrmask);
139 is_create_with_attrs(struct nfsd4_open *open)
141 return open->op_create == NFS4_OPEN_CREATE
142 && (open->op_createmode == NFS4_CREATE_UNCHECKED
143 || open->op_createmode == NFS4_CREATE_GUARDED
144 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
148 * if error occurs when setting the acl, just clear the acl bit
149 * in the returned attr bitmap.
152 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
153 struct nfs4_acl *acl, u32 *bmval)
157 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
160 * We should probably fail the whole open at this point,
161 * but we've already created the file, so it's too late;
162 * So this seems the least of evils:
164 bmval[0] &= ~FATTR4_WORD0_ACL;
168 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
171 dget(src->fh_dentry);
173 exp_get(src->fh_export);
178 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
182 if (open->op_truncate &&
183 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
186 accmode |= NFSD_MAY_READ_IF_EXEC;
188 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
189 accmode |= NFSD_MAY_READ;
190 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
191 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
192 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
193 accmode |= NFSD_MAY_WRITE;
195 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
200 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
202 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
209 * Using err_symlink as our catch-all case may look odd; but
210 * there's no other obvious error for this case in 4.0, and we
211 * happen to know that it will cause the linux v4 client to do
212 * the right thing on attempts to open something other than a
215 return nfserr_symlink;
218 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
220 if (nfsd4_has_session(cstate))
222 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
227 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
229 struct svc_fh *current_fh = &cstate->current_fh;
233 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
235 return nfserr_jukebox;
236 fh_init(*resfh, NFS4_FHSIZE);
237 open->op_truncate = false;
239 if (open->op_create) {
240 /* FIXME: check session persistence and pnfs flags.
241 * The nfsv4.1 spec requires the following semantics:
243 * Persistent | pNFS | Server REQUIRED | Client Allowed
244 * Reply Cache | server | |
245 * -------------+--------+-----------------+--------------------
246 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
248 * | | and EXCLUSIVE4 | or EXCLUSIVE4
250 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
251 * yes | no | GUARDED4 | GUARDED4
252 * yes | yes | GUARDED4 | GUARDED4
256 * Note: create modes (UNCHECKED,GUARDED...) are the same
257 * in NFSv4 as in v3 except EXCLUSIVE4_1.
259 current->fs->umask = open->op_umask;
260 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
261 open->op_fname.len, &open->op_iattr,
262 *resfh, open->op_createmode,
263 (u32 *)open->op_verf.data,
264 &open->op_truncate, &open->op_created);
265 current->fs->umask = 0;
267 if (!status && open->op_label.len)
268 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
271 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
272 * use the returned bitmask to indicate which attributes
273 * we used to store the verifier:
275 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
276 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
277 FATTR4_WORD1_TIME_MODIFY);
280 * Note this may exit with the parent still locked.
281 * We will hold the lock until nfsd4_open's final
282 * lookup, to prevent renames or unlinks until we've had
283 * a chance to an acquire a delegation if appropriate.
285 status = nfsd_lookup(rqstp, current_fh,
286 open->op_fname.data, open->op_fname.len, *resfh);
289 status = nfsd_check_obj_isreg(*resfh);
293 if (is_create_with_attrs(open) && open->op_acl != NULL)
294 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
296 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
297 accmode = NFSD_MAY_NOP;
298 if (open->op_created ||
299 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
300 accmode |= NFSD_MAY_OWNER_OVERRIDE;
301 status = do_open_permission(rqstp, *resfh, open, accmode);
302 set_change_info(&open->op_cinfo, current_fh);
308 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
310 struct svc_fh *current_fh = &cstate->current_fh;
314 /* We don't know the target directory, and therefore can not
315 * set the change info
318 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
320 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
322 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
323 (open->op_iattr.ia_size == 0);
325 * In the delegation case, the client is telling us about an
326 * open that it *already* performed locally, some time ago. We
327 * should let it succeed now if possible.
329 * In the case of a CLAIM_FH open, on the other hand, the client
330 * may be counting on us to enforce permissions (the Linux 4.1
331 * client uses this for normal opens, for example).
333 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
334 accmode = NFSD_MAY_OWNER_OVERRIDE;
336 status = do_open_permission(rqstp, current_fh, open, accmode);
342 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
344 struct nfsd4_sessionid *sid =
345 (struct nfsd4_sessionid *)session->se_sessionid.data;
347 clid->cl_boot = sid->clientid.cl_boot;
348 clid->cl_id = sid->clientid.cl_id;
352 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
355 struct nfsd4_open *open = &u->open;
357 struct svc_fh *resfh = NULL;
358 struct net *net = SVC_NET(rqstp);
359 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
360 bool reclaim = false;
362 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
363 (int)open->op_fname.len, open->op_fname.data,
366 /* This check required by spec. */
367 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
370 open->op_created = false;
373 * Before RECLAIM_COMPLETE done, server should deny new lock
375 if (nfsd4_has_session(cstate) &&
376 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
377 &cstate->session->se_client->cl_flags) &&
378 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
381 if (nfsd4_has_session(cstate))
382 copy_clientid(&open->op_clientid, cstate->session);
384 /* check seqid for replay. set nfs4_owner */
385 status = nfsd4_process_open1(cstate, open, nn);
386 if (status == nfserr_replay_me) {
387 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
388 fh_put(&cstate->current_fh);
389 fh_copy_shallow(&cstate->current_fh.fh_handle,
391 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
393 dprintk("nfsd4_open: replay failed"
394 " restoring previous filehandle\n");
396 status = nfserr_replay_me;
400 if (open->op_xdr_error) {
401 status = open->op_xdr_error;
405 status = nfsd4_check_open_attributes(rqstp, cstate, open);
409 /* Openowner is now set, so sequence id will get bumped. Now we need
410 * these checks before we do any creates: */
411 status = nfserr_grace;
412 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
414 status = nfserr_no_grace;
415 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
418 switch (open->op_claim_type) {
419 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
420 case NFS4_OPEN_CLAIM_NULL:
421 status = do_open_lookup(rqstp, cstate, open, &resfh);
425 case NFS4_OPEN_CLAIM_PREVIOUS:
426 status = nfs4_check_open_reclaim(&open->op_clientid,
430 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
433 case NFS4_OPEN_CLAIM_FH:
434 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
435 status = do_open_fhandle(rqstp, cstate, open);
438 resfh = &cstate->current_fh;
440 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
441 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
442 dprintk("NFSD: unsupported OPEN claim type %d\n",
443 open->op_claim_type);
444 status = nfserr_notsupp;
447 dprintk("NFSD: Invalid OPEN claim type %d\n",
448 open->op_claim_type);
449 status = nfserr_inval;
453 * nfsd4_process_open2() does the actual opening of the file. If
454 * successful, it (1) truncates the file if open->op_truncate was
455 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
457 status = nfsd4_process_open2(rqstp, resfh, open);
458 WARN(status && open->op_created,
459 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
460 be32_to_cpu(status));
461 if (reclaim && !status)
462 nn->somebody_reclaimed = true;
464 if (resfh && resfh != &cstate->current_fh) {
465 fh_dup2(&cstate->current_fh, resfh);
469 nfsd4_cleanup_open_state(cstate, open);
470 nfsd4_bump_seqid(cstate, status);
475 * OPEN is the only seqid-mutating operation whose decoding can fail
476 * with a seqid-mutating error (specifically, decoding of user names in
477 * the attributes). Therefore we have to do some processing to look up
478 * the stateowner so that we can bump the seqid.
480 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
482 struct nfsd4_open *open = &op->u.open;
484 if (!seqid_mutating_err(ntohl(op->status)))
486 if (nfsd4_has_session(cstate))
488 open->op_xdr_error = op->status;
489 return nfsd4_open(rqstp, cstate, &op->u);
493 * filehandle-manipulating ops.
496 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 u->getfh = &cstate->current_fh;
504 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
507 struct nfsd4_putfh *putfh = &u->putfh;
510 fh_put(&cstate->current_fh);
511 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
512 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
514 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
515 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
516 if (ret == nfserr_stale && putfh->no_verify) {
517 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
525 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
530 fh_put(&cstate->current_fh);
531 status = exp_pseudoroot(rqstp, &cstate->current_fh);
536 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
539 if (!cstate->save_fh.fh_dentry)
540 return nfserr_restorefh;
542 fh_dup2(&cstate->current_fh, &cstate->save_fh);
543 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
544 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
545 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
551 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
554 fh_dup2(&cstate->save_fh, &cstate->current_fh);
555 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
556 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
557 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
566 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
569 struct nfsd4_access *access = &u->access;
572 access_full = NFS3_ACCESS_FULL;
573 if (cstate->minorversion >= 2)
574 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
577 if (access->ac_req_access & ~access_full)
580 access->ac_resp_access = access->ac_req_access;
581 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
582 &access->ac_supported);
585 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
587 __be32 *verf = (__be32 *)verifier->data;
589 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
591 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
595 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
598 struct nfsd4_commit *commit = &u->commit;
600 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
602 (__be32 *)commit->co_verf.data);
606 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
609 struct nfsd4_create *create = &u->create;
614 fh_init(&resfh, NFS4_FHSIZE);
616 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
620 status = check_attr_support(rqstp, cstate, create->cr_bmval,
625 current->fs->umask = create->cr_umask;
626 switch (create->cr_type) {
628 status = nfsd_symlink(rqstp, &cstate->current_fh,
629 create->cr_name, create->cr_namelen,
630 create->cr_data, &resfh);
634 status = nfserr_inval;
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_IFBLK, rdev, &resfh);
645 status = nfserr_inval;
646 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
647 if (MAJOR(rdev) != create->cr_specdata1 ||
648 MINOR(rdev) != create->cr_specdata2)
650 status = nfsd_create(rqstp, &cstate->current_fh,
651 create->cr_name, create->cr_namelen,
652 &create->cr_iattr,S_IFCHR, rdev, &resfh);
656 status = nfsd_create(rqstp, &cstate->current_fh,
657 create->cr_name, create->cr_namelen,
658 &create->cr_iattr, S_IFSOCK, 0, &resfh);
662 status = nfsd_create(rqstp, &cstate->current_fh,
663 create->cr_name, create->cr_namelen,
664 &create->cr_iattr, S_IFIFO, 0, &resfh);
668 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
669 status = nfsd_create(rqstp, &cstate->current_fh,
670 create->cr_name, create->cr_namelen,
671 &create->cr_iattr, S_IFDIR, 0, &resfh);
675 status = nfserr_badtype;
681 if (create->cr_label.len)
682 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
684 if (create->cr_acl != NULL)
685 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
688 fh_unlock(&cstate->current_fh);
689 set_change_info(&create->cr_cinfo, &cstate->current_fh);
690 fh_dup2(&cstate->current_fh, &resfh);
694 current->fs->umask = 0;
699 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
702 struct nfsd4_getattr *getattr = &u->getattr;
705 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
709 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
712 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
713 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
714 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
716 getattr->ga_fhp = &cstate->current_fh;
721 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
724 struct nfsd4_link *link = &u->link;
727 status = nfsd_link(rqstp, &cstate->current_fh,
728 link->li_name, link->li_namelen, &cstate->save_fh);
730 set_change_info(&link->li_cinfo, &cstate->current_fh);
734 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
736 struct svc_fh tmp_fh;
739 fh_init(&tmp_fh, NFS4_FHSIZE);
740 ret = exp_pseudoroot(rqstp, &tmp_fh);
743 if (tmp_fh.fh_dentry == fh->fh_dentry) {
748 return nfsd_lookup(rqstp, fh, "..", 2, fh);
752 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
755 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
759 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
762 return nfsd_lookup(rqstp, &cstate->current_fh,
763 u->lookup.lo_name, u->lookup.lo_len,
764 &cstate->current_fh);
768 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
771 struct nfsd4_read *read = &u->read;
775 if (read->rd_offset >= OFFSET_MAX)
778 trace_nfsd_read_start(rqstp, &cstate->current_fh,
779 read->rd_offset, read->rd_length);
782 * If we do a zero copy read, then a client will see read data
783 * that reflects the state of the file *after* performing the
784 * following compound.
786 * To ensure proper ordering, we therefore turn off zero copy if
787 * the client wants us to do more in this compound:
789 if (!nfsd4_last_compound_op(rqstp))
790 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
793 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
794 &read->rd_stateid, RD_STATE,
797 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
802 read->rd_rqstp = rqstp;
803 read->rd_fhp = &cstate->current_fh;
809 nfsd4_read_release(union nfsd4_op_u *u)
812 nfsd_file_put(u->read.rd_nf);
813 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
814 u->read.rd_offset, u->read.rd_length);
818 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
821 struct nfsd4_readdir *readdir = &u->readdir;
822 u64 cookie = readdir->rd_cookie;
823 static const nfs4_verifier zeroverf;
825 /* no need to check permission - this will be done in nfsd_readdir() */
827 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
830 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
831 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
832 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
834 if ((cookie == 1) || (cookie == 2) ||
835 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
836 return nfserr_bad_cookie;
838 readdir->rd_rqstp = rqstp;
839 readdir->rd_fhp = &cstate->current_fh;
844 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
847 u->readlink.rl_rqstp = rqstp;
848 u->readlink.rl_fhp = &cstate->current_fh;
853 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
856 struct nfsd4_remove *remove = &u->remove;
859 if (opens_in_grace(SVC_NET(rqstp)))
861 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
862 remove->rm_name, remove->rm_namelen);
864 fh_unlock(&cstate->current_fh);
865 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
871 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
874 struct nfsd4_rename *rename = &u->rename;
877 if (opens_in_grace(SVC_NET(rqstp)))
879 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
880 rename->rn_snamelen, &cstate->current_fh,
881 rename->rn_tname, rename->rn_tnamelen);
884 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
885 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
890 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
893 struct nfsd4_secinfo *secinfo = &u->secinfo;
894 struct svc_export *exp;
895 struct dentry *dentry;
898 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
901 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
902 secinfo->si_name, secinfo->si_namelen,
906 fh_unlock(&cstate->current_fh);
907 if (d_really_is_negative(dentry)) {
911 secinfo->si_exp = exp;
913 if (cstate->minorversion)
914 /* See rfc 5661 section 2.6.3.1.1.8 */
915 fh_put(&cstate->current_fh);
920 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
925 switch (u->secinfo_no_name.sin_style) {
926 case NFS4_SECINFO_STYLE4_CURRENT_FH:
928 case NFS4_SECINFO_STYLE4_PARENT:
929 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
937 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
938 fh_put(&cstate->current_fh);
943 nfsd4_secinfo_release(union nfsd4_op_u *u)
945 if (u->secinfo.si_exp)
946 exp_put(u->secinfo.si_exp);
950 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
952 if (u->secinfo_no_name.sin_exp)
953 exp_put(u->secinfo_no_name.sin_exp);
957 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
960 struct nfsd4_setattr *setattr = &u->setattr;
961 __be32 status = nfs_ok;
964 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
965 status = nfs4_preprocess_stateid_op(rqstp, cstate,
966 &cstate->current_fh, &setattr->sa_stateid,
967 WR_STATE, NULL, NULL);
969 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
973 err = fh_want_write(&cstate->current_fh);
975 return nfserrno(err);
978 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
983 if (setattr->sa_acl != NULL)
984 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
988 if (setattr->sa_label.len)
989 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
993 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
996 fh_drop_write(&cstate->current_fh);
1001 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1002 union nfsd4_op_u *u)
1004 struct nfsd4_write *write = &u->write;
1005 stateid_t *stateid = &write->wr_stateid;
1006 struct nfsd_file *nf = NULL;
1007 __be32 status = nfs_ok;
1011 if (write->wr_offset >= OFFSET_MAX)
1012 return nfserr_inval;
1014 cnt = write->wr_buflen;
1015 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1016 write->wr_offset, cnt);
1017 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1018 stateid, WR_STATE, &nf, NULL);
1020 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1024 write->wr_how_written = write->wr_stable_how;
1026 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1027 &write->wr_head, write->wr_buflen);
1028 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1030 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1031 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1032 write->wr_how_written,
1033 (__be32 *)write->wr_verifier.data);
1036 write->wr_bytes_written = cnt;
1037 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1038 write->wr_offset, cnt);
1043 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1044 stateid_t *src_stateid, struct nfsd_file **src,
1045 stateid_t *dst_stateid, struct nfsd_file **dst)
1049 if (!cstate->save_fh.fh_dentry)
1050 return nfserr_nofilehandle;
1052 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1053 src_stateid, RD_STATE, src, NULL);
1055 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1059 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1060 dst_stateid, WR_STATE, dst, NULL);
1062 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1066 /* fix up for NFS-specific error code */
1067 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1068 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1069 status = nfserr_wrong_type;
1076 nfsd_file_put(*dst);
1078 nfsd_file_put(*src);
1083 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1084 union nfsd4_op_u *u)
1086 struct nfsd4_clone *clone = &u->clone;
1087 struct nfsd_file *src, *dst;
1090 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1091 &clone->cl_dst_stateid, &dst);
1095 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1096 dst, clone->cl_dst_pos, clone->cl_count,
1097 EX_ISSYNC(cstate->current_fh.fh_export));
1105 void nfs4_put_copy(struct nfsd4_copy *copy)
1107 if (!refcount_dec_and_test(©->refcount))
1113 check_and_set_stop_copy(struct nfsd4_copy *copy)
1117 spin_lock(©->cp_clp->async_lock);
1118 value = copy->stopped;
1120 copy->stopped = true;
1121 spin_unlock(©->cp_clp->async_lock);
1125 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1127 /* only 1 thread should stop the copy */
1128 if (!check_and_set_stop_copy(copy))
1129 kthread_stop(copy->copy_task);
1130 nfs4_put_copy(copy);
1133 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1135 struct nfsd4_copy *copy = NULL;
1137 spin_lock(&clp->async_lock);
1138 if (!list_empty(&clp->async_copies)) {
1139 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1141 refcount_inc(©->refcount);
1143 spin_unlock(&clp->async_lock);
1147 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1149 struct nfsd4_copy *copy;
1151 while ((copy = nfsd4_get_copy(clp)) != NULL)
1152 nfsd4_stop_copy(copy);
1154 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
1156 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1157 struct nfs_fh *src_fh,
1158 nfs4_stateid *stateid);
1159 extern void nfs42_ssc_close(struct file *filep);
1161 extern void nfs_sb_deactive(struct super_block *sb);
1163 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1166 * Support one copy source server for now.
1169 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1170 struct vfsmount **mount)
1172 struct file_system_type *type;
1173 struct vfsmount *ss_mnt;
1174 struct nfs42_netaddr *naddr;
1175 struct sockaddr_storage tmp_addr;
1176 size_t tmp_addrlen, match_netid_len = 3;
1177 char *startsep = "", *endsep = "", *match_netid = "tcp";
1178 char *ipaddr, *dev_name, *raw_data;
1180 __be32 status = nfserr_inval;
1182 naddr = &nss->u.nl4_addr;
1183 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1185 (struct sockaddr *)&tmp_addr,
1187 if (tmp_addrlen == 0)
1190 if (tmp_addr.ss_family == AF_INET6) {
1193 match_netid = "tcp6";
1194 match_netid_len = 4;
1197 if (naddr->netid_len != match_netid_len ||
1198 strncmp(naddr->netid, match_netid, naddr->netid_len))
1201 /* Construct the raw data for the vfs_kern_mount call */
1202 len = RPC_MAX_ADDRBUFLEN + 1;
1203 ipaddr = kzalloc(len, GFP_KERNEL);
1207 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1209 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1211 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1212 raw_data = kzalloc(raw_len, GFP_KERNEL);
1214 goto out_free_ipaddr;
1216 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1218 status = nfserr_nodev;
1219 type = get_fs_type("nfs");
1221 goto out_free_rawdata;
1223 /* Set the server:<export> for the vfs_kern_mount call */
1224 dev_name = kzalloc(len + 5, GFP_KERNEL);
1226 goto out_free_rawdata;
1227 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1229 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1230 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1231 module_put(type->owner);
1233 goto out_free_devname;
1249 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1251 nfs_do_sb_deactive(ss_mnt->mnt_sb);
1256 * Verify COPY destination stateid.
1258 * Connect to the source server with NFSv4.1.
1259 * Create the source struct file for nfsd_copy_range.
1260 * Called with COPY cstate:
1261 * SAVED_FH: source filehandle
1262 * CURRENT_FH: destination filehandle
1265 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1266 struct nfsd4_compound_state *cstate,
1267 struct nfsd4_copy *copy, struct vfsmount **mount)
1269 struct svc_fh *s_fh = NULL;
1270 stateid_t *s_stid = ©->cp_src_stateid;
1271 __be32 status = nfserr_inval;
1273 /* Verify the destination stateid and set dst struct file*/
1274 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1275 ©->cp_dst_stateid,
1276 WR_STATE, ©->nf_dst, NULL);
1280 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
1284 s_fh = &cstate->save_fh;
1286 copy->c_fh.size = s_fh->fh_handle.fh_size;
1287 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
1288 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1289 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1290 sizeof(stateid_opaque_t));
1298 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1299 struct nfsd_file *dst)
1301 nfs42_ssc_close(src->nf_file);
1307 #else /* CONFIG_NFSD_V4_2_INTER_SSC */
1310 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1311 struct nfsd4_compound_state *cstate,
1312 struct nfsd4_copy *copy,
1313 struct vfsmount **mount)
1316 return nfserr_inval;
1320 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1321 struct nfsd_file *dst)
1326 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1330 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1331 struct nfs_fh *src_fh,
1332 nfs4_stateid *stateid)
1336 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1339 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1340 struct nfsd4_compound_state *cstate,
1341 struct nfsd4_copy *copy)
1343 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1344 ©->nf_src, ©->cp_dst_stateid,
1349 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1355 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1357 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1359 nfs4_put_copy(copy);
1362 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1363 struct rpc_task *task)
1368 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1369 .release = nfsd4_cb_offload_release,
1370 .done = nfsd4_cb_offload_done
1373 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1375 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1376 copy->cp_synchronous = sync;
1377 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1380 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1382 ssize_t bytes_copied = 0;
1383 size_t bytes_total = copy->cp_count;
1384 u64 src_pos = copy->cp_src_pos;
1385 u64 dst_pos = copy->cp_dst_pos;
1388 if (kthread_should_stop())
1390 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1391 src_pos, copy->nf_dst->nf_file, dst_pos,
1393 if (bytes_copied <= 0)
1395 bytes_total -= bytes_copied;
1396 copy->cp_res.wr_bytes_written += bytes_copied;
1397 src_pos += bytes_copied;
1398 dst_pos += bytes_copied;
1399 } while (bytes_total > 0 && !copy->cp_synchronous);
1400 return bytes_copied;
1403 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1408 bytes = _nfsd_copy_file_range(copy);
1409 /* for async copy, we ignore the error, client can always retry
1412 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1413 status = nfserrno(bytes);
1415 nfsd4_init_copy_res(copy, sync);
1419 if (!copy->cp_intra) /* Inter server SSC */
1420 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1423 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1428 static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1430 dst->cp_src_pos = src->cp_src_pos;
1431 dst->cp_dst_pos = src->cp_dst_pos;
1432 dst->cp_count = src->cp_count;
1433 dst->cp_synchronous = src->cp_synchronous;
1434 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1435 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1436 dst->cp_clp = src->cp_clp;
1437 dst->nf_dst = nfsd_file_get(src->nf_dst);
1438 dst->cp_intra = src->cp_intra;
1439 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1440 dst->nf_src = nfsd_file_get(src->nf_src);
1442 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1443 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1444 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1445 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1446 dst->ss_mnt = src->ss_mnt;
1451 static void cleanup_async_copy(struct nfsd4_copy *copy)
1453 nfs4_free_copy_state(copy);
1454 nfsd_file_put(copy->nf_dst);
1456 nfsd_file_put(copy->nf_src);
1457 spin_lock(©->cp_clp->async_lock);
1458 list_del(©->copies);
1459 spin_unlock(©->cp_clp->async_lock);
1460 nfs4_put_copy(copy);
1463 static int nfsd4_do_async_copy(void *data)
1465 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1466 struct nfsd4_copy *cb_copy;
1468 if (!copy->cp_intra) { /* Inter server SSC */
1469 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1470 if (!copy->nf_src) {
1471 copy->nfserr = nfserr_serverfault;
1472 nfsd4_interssc_disconnect(copy->ss_mnt);
1475 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1477 if (IS_ERR(copy->nf_src->nf_file)) {
1478 copy->nfserr = nfserr_offload_denied;
1479 nfsd4_interssc_disconnect(copy->ss_mnt);
1484 copy->nfserr = nfsd4_do_copy(copy, 0);
1486 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1489 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1490 cb_copy->cp_clp = copy->cp_clp;
1491 cb_copy->nfserr = copy->nfserr;
1492 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1493 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1494 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1495 nfsd4_run_cb(&cb_copy->cp_cb);
1497 if (!copy->cp_intra)
1498 kfree(copy->nf_src);
1499 cleanup_async_copy(copy);
1504 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1505 union nfsd4_op_u *u)
1507 struct nfsd4_copy *copy = &u->copy;
1509 struct nfsd4_copy *async_copy = NULL;
1511 if (!copy->cp_intra) { /* Inter server SSC */
1512 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1513 status = nfserr_notsupp;
1516 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1519 return nfserr_offload_denied;
1521 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1526 copy->cp_clp = cstate->clp;
1527 memcpy(©->fh, &cstate->current_fh.fh_handle,
1528 sizeof(struct knfsd_fh));
1529 if (!copy->cp_synchronous) {
1530 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1532 status = nfserrno(-ENOMEM);
1533 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1536 if (!nfs4_init_copy_state(nn, copy))
1538 refcount_set(&async_copy->refcount, 1);
1539 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1540 sizeof(copy->cp_stateid));
1541 status = dup_copy_fields(copy, async_copy);
1544 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1545 async_copy, "%s", "copy thread");
1546 if (IS_ERR(async_copy->copy_task))
1548 spin_lock(&async_copy->cp_clp->async_lock);
1549 list_add(&async_copy->copies,
1550 &async_copy->cp_clp->async_copies);
1551 spin_unlock(&async_copy->cp_clp->async_lock);
1552 wake_up_process(async_copy->copy_task);
1555 status = nfsd4_do_copy(copy, 1);
1561 cleanup_async_copy(async_copy);
1562 status = nfserrno(-ENOMEM);
1563 if (!copy->cp_intra)
1564 nfsd4_interssc_disconnect(copy->ss_mnt);
1569 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1571 struct nfsd4_copy *copy;
1573 spin_lock(&clp->async_lock);
1574 list_for_each_entry(copy, &clp->async_copies, copies) {
1575 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
1577 refcount_inc(©->refcount);
1578 spin_unlock(&clp->async_lock);
1581 spin_unlock(&clp->async_lock);
1586 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1587 struct nfsd4_compound_state *cstate,
1588 union nfsd4_op_u *u)
1590 struct nfsd4_offload_status *os = &u->offload_status;
1591 struct nfsd4_copy *copy;
1592 struct nfs4_client *clp = cstate->clp;
1594 copy = find_async_copy(clp, &os->stateid);
1596 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1598 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1600 nfsd4_stop_copy(copy);
1606 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1607 union nfsd4_op_u *u)
1609 struct nfsd4_copy_notify *cn = &u->copy_notify;
1611 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1612 struct nfs4_stid *stid;
1613 struct nfs4_cpntf_state *cps;
1614 struct nfs4_client *clp = cstate->clp;
1616 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1617 &cn->cpn_src_stateid, RD_STATE, NULL,
1622 cn->cpn_sec = nn->nfsd4_lease;
1625 status = nfserrno(-ENOMEM);
1626 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1629 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1630 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1631 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1633 /* For now, only return one server address in cpn_src, the
1634 * address used by the client to connect to this server.
1636 cn->cpn_src.nl4_type = NL4_NETADDR;
1637 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1638 &cn->cpn_src.u.nl4_addr);
1639 WARN_ON_ONCE(status);
1641 nfs4_put_cpntf_state(nn, cps);
1645 nfs4_put_stid(stid);
1650 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1651 struct nfsd4_fallocate *fallocate, int flags)
1654 struct nfsd_file *nf;
1656 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1657 &fallocate->falloc_stateid,
1658 WR_STATE, &nf, NULL);
1659 if (status != nfs_ok) {
1660 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1664 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1665 fallocate->falloc_offset,
1666 fallocate->falloc_length,
1672 nfsd4_offload_status(struct svc_rqst *rqstp,
1673 struct nfsd4_compound_state *cstate,
1674 union nfsd4_op_u *u)
1676 struct nfsd4_offload_status *os = &u->offload_status;
1678 struct nfsd4_copy *copy;
1679 struct nfs4_client *clp = cstate->clp;
1681 copy = find_async_copy(clp, &os->stateid);
1683 os->count = copy->cp_res.wr_bytes_written;
1684 nfs4_put_copy(copy);
1686 status = nfserr_bad_stateid;
1692 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1693 union nfsd4_op_u *u)
1695 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1699 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1700 union nfsd4_op_u *u)
1702 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1703 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1707 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1708 union nfsd4_op_u *u)
1710 struct nfsd4_seek *seek = &u->seek;
1713 struct nfsd_file *nf;
1715 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1716 &seek->seek_stateid,
1717 RD_STATE, &nf, NULL);
1719 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1723 switch (seek->seek_whence) {
1724 case NFS4_CONTENT_DATA:
1727 case NFS4_CONTENT_HOLE:
1731 status = nfserr_union_notsupp;
1736 * Note: This call does change file->f_pos, but nothing in NFSD
1737 * should ever file->f_pos.
1739 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1740 if (seek->seek_pos < 0)
1741 status = nfserrno(seek->seek_pos);
1742 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1743 seek->seek_eof = true;
1750 /* This routine never returns NFS_OK! If there are no other errors, it
1751 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1752 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1753 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1756 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1757 struct nfsd4_verify *verify)
1763 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1767 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1771 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1772 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1773 return nfserr_inval;
1774 if (verify->ve_attrlen & 3)
1775 return nfserr_inval;
1778 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1780 count = 4 + (verify->ve_attrlen >> 2);
1781 buf = kmalloc(count << 2, GFP_KERNEL);
1783 return nfserr_jukebox;
1786 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1787 cstate->current_fh.fh_export,
1788 cstate->current_fh.fh_dentry,
1792 * If nfsd4_encode_fattr() ran out of space, assume that's because
1793 * the attributes are longer (hence different) than those given:
1795 if (status == nfserr_resource)
1796 status = nfserr_not_same;
1801 p = buf + 1 + ntohl(buf[0]);
1802 status = nfserr_not_same;
1803 if (ntohl(*p++) != verify->ve_attrlen)
1805 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1806 status = nfserr_same;
1814 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1815 union nfsd4_op_u *u)
1819 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1820 return status == nfserr_not_same ? nfs_ok : status;
1824 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1825 union nfsd4_op_u *u)
1829 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1830 return status == nfserr_same ? nfs_ok : status;
1833 #ifdef CONFIG_NFSD_PNFS
1834 static const struct nfsd4_layout_ops *
1835 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1837 if (!exp->ex_layout_types) {
1838 dprintk("%s: export does not support pNFS\n", __func__);
1842 if (layout_type >= LAYOUT_TYPE_MAX ||
1843 !(exp->ex_layout_types & (1 << layout_type))) {
1844 dprintk("%s: layout type %d not supported\n",
1845 __func__, layout_type);
1849 return nfsd4_layout_ops[layout_type];
1853 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1854 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1856 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1857 const struct nfsd4_layout_ops *ops;
1858 struct nfsd4_deviceid_map *map;
1859 struct svc_export *exp;
1862 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1864 gdp->gd_layout_type,
1865 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1868 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1870 dprintk("%s: couldn't find device ID to export mapping!\n",
1872 return nfserr_noent;
1875 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1877 dprintk("%s: could not find device id\n", __func__);
1878 return nfserr_noent;
1881 nfserr = nfserr_layoutunavailable;
1882 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1887 if (gdp->gd_maxcount != 0) {
1888 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1889 rqstp, cstate->session->se_client, gdp);
1892 gdp->gd_notify_types &= ops->notify_types;
1899 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1901 kfree(u->getdeviceinfo.gd_device);
1905 nfsd4_layoutget(struct svc_rqst *rqstp,
1906 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1908 struct nfsd4_layoutget *lgp = &u->layoutget;
1909 struct svc_fh *current_fh = &cstate->current_fh;
1910 const struct nfsd4_layout_ops *ops;
1911 struct nfs4_layout_stateid *ls;
1913 int accmode = NFSD_MAY_READ_IF_EXEC;
1915 switch (lgp->lg_seg.iomode) {
1917 accmode |= NFSD_MAY_READ;
1920 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1923 dprintk("%s: invalid iomode %d\n",
1924 __func__, lgp->lg_seg.iomode);
1925 nfserr = nfserr_badiomode;
1929 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1933 nfserr = nfserr_layoutunavailable;
1934 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1939 * Verify minlength and range as per RFC5661:
1940 * o If loga_length is less than loga_minlength,
1941 * the metadata server MUST return NFS4ERR_INVAL.
1942 * o If the sum of loga_offset and loga_minlength exceeds
1943 * NFS4_UINT64_MAX, and loga_minlength is not
1944 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1945 * o If the sum of loga_offset and loga_length exceeds
1946 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1947 * the error NFS4ERR_INVAL MUST result.
1949 nfserr = nfserr_inval;
1950 if (lgp->lg_seg.length < lgp->lg_minlength ||
1951 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1952 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1953 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1954 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1956 if (lgp->lg_seg.length == 0)
1959 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1960 true, lgp->lg_layout_type, &ls);
1962 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1966 nfserr = nfserr_recallconflict;
1967 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1970 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1975 nfserr = nfsd4_insert_layout(lgp, ls);
1978 mutex_unlock(&ls->ls_mutex);
1979 nfs4_put_stid(&ls->ls_stid);
1985 nfsd4_layoutget_release(union nfsd4_op_u *u)
1987 kfree(u->layoutget.lg_content);
1991 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1992 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1994 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1995 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1996 struct svc_fh *current_fh = &cstate->current_fh;
1997 const struct nfsd4_layout_ops *ops;
1998 loff_t new_size = lcp->lc_last_wr + 1;
1999 struct inode *inode;
2000 struct nfs4_layout_stateid *ls;
2003 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2007 nfserr = nfserr_layoutunavailable;
2008 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2011 inode = d_inode(current_fh->fh_dentry);
2013 nfserr = nfserr_inval;
2014 if (new_size <= seg->offset) {
2015 dprintk("pnfsd: last write before layout segment\n");
2018 if (new_size > seg->offset + seg->length) {
2019 dprintk("pnfsd: last write beyond layout segment\n");
2022 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2023 dprintk("pnfsd: layoutcommit beyond EOF\n");
2027 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2028 false, lcp->lc_layout_type,
2031 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2032 /* fixup error code as per RFC5661 */
2033 if (nfserr == nfserr_bad_stateid)
2034 nfserr = nfserr_badlayout;
2038 /* LAYOUTCOMMIT does not require any serialization */
2039 mutex_unlock(&ls->ls_mutex);
2041 if (new_size > i_size_read(inode)) {
2042 lcp->lc_size_chg = 1;
2043 lcp->lc_newsize = new_size;
2045 lcp->lc_size_chg = 0;
2048 nfserr = ops->proc_layoutcommit(inode, lcp);
2049 nfs4_put_stid(&ls->ls_stid);
2055 nfsd4_layoutreturn(struct svc_rqst *rqstp,
2056 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2058 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2059 struct svc_fh *current_fh = &cstate->current_fh;
2062 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2066 nfserr = nfserr_layoutunavailable;
2067 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2070 switch (lrp->lr_seg.iomode) {
2076 dprintk("%s: invalid iomode %d\n", __func__,
2077 lrp->lr_seg.iomode);
2078 nfserr = nfserr_inval;
2082 switch (lrp->lr_return_type) {
2084 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2088 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2091 dprintk("%s: invalid return_type %d\n", __func__,
2092 lrp->lr_return_type);
2093 nfserr = nfserr_inval;
2099 #endif /* CONFIG_NFSD_PNFS */
2102 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2103 union nfsd4_op_u *u)
2105 struct nfsd4_getxattr *getxattr = &u->getxattr;
2107 return nfsd_getxattr(rqstp, &cstate->current_fh,
2108 getxattr->getxa_name, &getxattr->getxa_buf,
2109 &getxattr->getxa_len);
2113 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2114 union nfsd4_op_u *u)
2116 struct nfsd4_setxattr *setxattr = &u->setxattr;
2119 if (opens_in_grace(SVC_NET(rqstp)))
2120 return nfserr_grace;
2122 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2123 setxattr->setxa_buf, setxattr->setxa_len,
2124 setxattr->setxa_flags);
2127 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2133 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2134 union nfsd4_op_u *u)
2137 * Get the entire list, then copy out only the user attributes
2138 * in the encode function.
2140 return nfsd_listxattr(rqstp, &cstate->current_fh,
2141 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2145 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2146 union nfsd4_op_u *u)
2148 struct nfsd4_removexattr *removexattr = &u->removexattr;
2151 if (opens_in_grace(SVC_NET(rqstp)))
2152 return nfserr_grace;
2154 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2155 removexattr->rmxa_name);
2158 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2167 nfsd4_proc_null(struct svc_rqst *rqstp)
2172 static inline void nfsd4_increment_op_stats(u32 opnum)
2174 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2175 nfsdstats.nfs4_opcount[opnum]++;
2178 static const struct nfsd4_operation nfsd4_ops[];
2180 static const char *nfsd4_op_name(unsigned opnum);
2183 * Enforce NFSv4.1 COMPOUND ordering rules:
2185 * Also note, enforced elsewhere:
2186 * - SEQUENCE other than as first op results in
2187 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2188 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2189 * (Enforced in nfsd4_bind_conn_to_session().)
2190 * - DESTROY_SESSION must be the final operation in a compound, if
2191 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2192 * (Enforced in nfsd4_destroy_session().)
2194 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2196 struct nfsd4_op *first_op = &args->ops[0];
2198 /* These ordering requirements don't apply to NFSv4.0: */
2199 if (args->minorversion == 0)
2201 /* This is weird, but OK, not our problem: */
2202 if (args->opcnt == 0)
2204 if (first_op->status == nfserr_op_illegal)
2206 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2207 return nfserr_op_not_in_session;
2208 if (first_op->opnum == OP_SEQUENCE)
2211 * So first_op is something allowed outside a session, like
2212 * EXCHANGE_ID; but then it has to be the only op in the
2215 if (args->opcnt != 1)
2216 return nfserr_not_only_op;
2220 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2222 return &nfsd4_ops[op->opnum];
2225 bool nfsd4_cache_this_op(struct nfsd4_op *op)
2227 if (op->opnum == OP_ILLEGAL)
2229 return OPDESC(op)->op_flags & OP_CACHEME;
2232 static bool need_wrongsec_check(struct svc_rqst *rqstp)
2234 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2235 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2236 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2237 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2238 const struct nfsd4_operation *thisd = OPDESC(this);
2239 const struct nfsd4_operation *nextd;
2242 * Most ops check wronsec on our own; only the putfh-like ops
2243 * have special rules.
2245 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2248 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2249 * put-filehandle operation if we're not going to use the
2252 if (argp->opcnt == resp->opcnt)
2254 if (next->opnum == OP_ILLEGAL)
2256 nextd = OPDESC(next);
2258 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2259 * errors themselves as necessary; others should check for them
2262 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2265 static void svcxdr_init_encode(struct svc_rqst *rqstp,
2266 struct nfsd4_compoundres *resp)
2268 struct xdr_stream *xdr = &resp->xdr;
2269 struct xdr_buf *buf = &rqstp->rq_res;
2270 struct kvec *head = buf->head;
2274 xdr->p = head->iov_base + head->iov_len;
2275 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
2276 /* Tail and page_len should be zero at this point: */
2277 buf->len = buf->head[0].iov_len;
2278 xdr->scratch.iov_len = 0;
2279 xdr->page_ptr = buf->pages - 1;
2280 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
2281 - rqstp->rq_auth_slack;
2284 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
2286 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2288 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2289 struct nfsd4_copy *copy;
2290 struct nfsd4_putfh *putfh;
2293 /* traverse all operation and if it's a COPY compound, mark the
2294 * source filehandle to skip verification
2296 for (i = 0; i < args->opcnt; i++) {
2298 if (op->opnum == OP_PUTFH)
2300 else if (op->opnum == OP_SAVEFH)
2301 saved_op = current_op;
2302 else if (op->opnum == OP_RESTOREFH)
2303 current_op = saved_op;
2304 else if (op->opnum == OP_COPY) {
2305 copy = (struct nfsd4_copy *)&op->u;
2307 op->status = nfserr_nofilehandle;
2310 putfh = (struct nfsd4_putfh *)&saved_op->u;
2311 if (!copy->cp_intra)
2312 putfh->no_verify = true;
2318 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2327 nfsd4_proc_compound(struct svc_rqst *rqstp)
2329 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2330 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2331 struct nfsd4_op *op;
2332 struct nfsd4_compound_state *cstate = &resp->cstate;
2333 struct svc_fh *current_fh = &cstate->current_fh;
2334 struct svc_fh *save_fh = &cstate->save_fh;
2335 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2338 svcxdr_init_encode(rqstp, resp);
2339 resp->tagp = resp->xdr.p;
2340 /* reserve space for: taglen, tag, and opcnt */
2341 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
2342 resp->taglen = args->taglen;
2343 resp->tag = args->tag;
2344 resp->rqstp = rqstp;
2345 cstate->minorversion = args->minorversion;
2346 fh_init(current_fh, NFS4_FHSIZE);
2347 fh_init(save_fh, NFS4_FHSIZE);
2349 * Don't use the deferral mechanism for NFSv4; compounds make it
2350 * too hard to avoid non-idempotency problems.
2352 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2355 * According to RFC3010, this takes precedence over all other errors.
2357 status = nfserr_minor_vers_mismatch;
2358 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2360 status = nfserr_resource;
2361 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2364 status = nfs41_check_op_ordering(args);
2367 op->status = status;
2371 check_if_stalefh_allowed(args);
2373 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2375 trace_nfsd_compound(rqstp, args->opcnt);
2376 while (!status && resp->opcnt < args->opcnt) {
2377 op = &args->ops[resp->opcnt++];
2380 * The XDR decode routines may have pre-set op->status;
2381 * for example, if there is a miscellaneous XDR error
2382 * it will be set to nfserr_bad_xdr.
2385 if (op->opnum == OP_OPEN)
2386 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2389 if (!current_fh->fh_dentry &&
2390 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2391 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2392 op->status = nfserr_nofilehandle;
2395 } else if (current_fh->fh_export &&
2396 current_fh->fh_export->ex_fslocs.migrated &&
2397 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2398 op->status = nfserr_moved;
2402 fh_clear_wcc(current_fh);
2404 /* If op is non-idempotent */
2405 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2407 * Don't execute this op if we couldn't encode a
2410 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2412 * Plus if there's another operation, make sure
2413 * we'll have space to at least encode an error:
2415 if (resp->opcnt < args->opcnt)
2416 plen += COMPOUND_ERR_SLACK_SPACE;
2417 op->status = nfsd4_check_resp_size(resp, plen);
2423 if (op->opdesc->op_get_currentstateid)
2424 op->opdesc->op_get_currentstateid(cstate, &op->u);
2425 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2427 /* Only from SEQUENCE */
2428 if (cstate->status == nfserr_replay_cache) {
2429 dprintk("%s NFS4.1 replay from cache\n", __func__);
2430 status = op->status;
2434 if (op->opdesc->op_set_currentstateid)
2435 op->opdesc->op_set_currentstateid(cstate, &op->u);
2437 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2438 clear_current_stateid(cstate);
2440 if (current_fh->fh_export &&
2441 need_wrongsec_check(rqstp))
2442 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2445 if (op->status == nfserr_replay_me) {
2446 op->replay = &cstate->replay_owner->so_replay;
2447 nfsd4_encode_replay(&resp->xdr, op);
2448 status = op->status = op->replay->rp_status;
2450 nfsd4_encode_operation(resp, op);
2451 status = op->status;
2454 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2455 nfsd4_op_name(op->opnum));
2457 nfsd4_cstate_clear_replay(cstate);
2458 nfsd4_increment_op_stats(op->opnum);
2463 BUG_ON(cstate->replay_owner);
2465 cstate->status = status;
2466 /* Reset deferral mechanism for RPC deferrals */
2467 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2471 #define op_encode_hdr_size (2)
2472 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2473 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2474 #define op_encode_change_info_maxsz (5)
2475 #define nfs4_fattr_bitmap_maxsz (4)
2477 /* We'll fall back on returning no lockowner if run out of space: */
2478 #define op_encode_lockowner_maxsz (0)
2479 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2481 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2483 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2484 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2485 op_encode_ace_maxsz)
2487 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2489 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2491 return (op_encode_hdr_size) * sizeof(__be32);
2494 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2496 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2499 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2501 /* ac_supported, ac_resp_access */
2502 return (op_encode_hdr_size + 2)* sizeof(__be32);
2505 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2507 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2510 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2512 return (op_encode_hdr_size + op_encode_change_info_maxsz
2513 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2517 * Note since this is an idempotent operation we won't insist on failing
2518 * the op prematurely if the estimate is too large. We may turn off splice
2519 * reads unnecessarily.
2521 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2522 struct nfsd4_op *op)
2524 u32 *bmap = op->u.getattr.ga_bmval;
2525 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2528 if (bmap0 & FATTR4_WORD0_ACL)
2529 return svc_max_payload(rqstp);
2530 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2531 return svc_max_payload(rqstp);
2533 if (bmap1 & FATTR4_WORD1_OWNER) {
2534 ret += IDMAP_NAMESZ + 4;
2535 bmap1 &= ~FATTR4_WORD1_OWNER;
2537 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2538 ret += IDMAP_NAMESZ + 4;
2539 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2541 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2542 ret += NFS4_FHSIZE + 4;
2543 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2545 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2546 ret += NFS4_MAXLABELLEN + 12;
2547 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2550 * Largest of remaining attributes are 16 bytes (e.g.,
2551 * supported_attributes)
2553 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2554 /* bitmask, length */
2559 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2561 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2564 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2566 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2570 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2572 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2576 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2578 return (op_encode_hdr_size + op_encode_stateid_maxsz
2579 + op_encode_change_info_maxsz + 1
2580 + nfs4_fattr_bitmap_maxsz
2581 + op_encode_delegation_maxsz) * sizeof(__be32);
2584 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2586 u32 maxcount = 0, rlen = 0;
2588 maxcount = svc_max_payload(rqstp);
2589 rlen = min(op->u.read.rd_length, maxcount);
2591 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2594 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2596 u32 maxcount = svc_max_payload(rqstp);
2597 u32 rlen = min(op->u.read.rd_length, maxcount);
2599 * If we detect that the file changed during hole encoding, then we
2600 * recover by encoding the remaining reply as data. This means we need
2601 * to set aside enough room to encode two data segments.
2603 u32 seg_len = 2 * (1 + 2 + 1);
2605 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2608 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2610 u32 maxcount = 0, rlen = 0;
2612 maxcount = svc_max_payload(rqstp);
2613 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2615 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2616 XDR_QUADLEN(rlen)) * sizeof(__be32);
2619 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2621 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2624 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2626 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2630 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2632 return (op_encode_hdr_size + op_encode_change_info_maxsz
2633 + op_encode_change_info_maxsz) * sizeof(__be32);
2636 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2637 struct nfsd4_op *op)
2639 return (op_encode_hdr_size
2640 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2643 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2645 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2649 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2651 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2654 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2656 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2657 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2660 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2662 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2666 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2668 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2671 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2673 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2674 1 + 1 + /* eir_flags, spr_how */\
2675 4 + /* spo_must_enforce & _allow with bitmap */\
2676 2 + /*eir_server_owner.so_minor_id */\
2677 /* eir_server_owner.so_major_id<> */\
2678 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2679 /* eir_server_scope<> */\
2680 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2681 1 + /* eir_server_impl_id array length */\
2682 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2685 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2687 return (op_encode_hdr_size + \
2688 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2689 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2692 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2694 return (op_encode_hdr_size + \
2695 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2696 2 + /* csr_sequence, csr_flags */\
2697 op_encode_channel_attrs_maxsz + \
2698 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2701 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2703 return (op_encode_hdr_size +
2704 1 /* wr_callback */ +
2705 op_encode_stateid_maxsz /* wr_callback */ +
2707 1 /* wr_committed */ +
2708 op_encode_verifier_maxsz +
2709 1 /* cr_consecutive */ +
2710 1 /* cr_synchronous */) * sizeof(__be32);
2713 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2714 struct nfsd4_op *op)
2716 return (op_encode_hdr_size +
2718 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2721 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2722 struct nfsd4_op *op)
2724 return (op_encode_hdr_size +
2725 3 /* cnr_lease_time */ +
2726 1 /* We support one cnr_source_server */ +
2727 1 /* cnr_stateid seq */ +
2728 op_encode_stateid_maxsz /* cnr_stateid */ +
2729 1 /* num cnr_source_server*/ +
2732 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2736 #ifdef CONFIG_NFSD_PNFS
2737 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2739 u32 maxcount = 0, rlen = 0;
2741 maxcount = svc_max_payload(rqstp);
2742 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2744 return (op_encode_hdr_size +
2745 1 /* gd_layout_type*/ +
2747 2 /* gd_notify_types */) * sizeof(__be32);
2751 * At this stage we don't really know what layout driver will handle the request,
2752 * so we need to define an arbitrary upper bound here.
2754 #define MAX_LAYOUT_SIZE 128
2755 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2757 return (op_encode_hdr_size +
2758 1 /* logr_return_on_close */ +
2759 op_encode_stateid_maxsz +
2760 1 /* nr of layouts */ +
2761 MAX_LAYOUT_SIZE) * sizeof(__be32);
2764 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2766 return (op_encode_hdr_size +
2767 1 /* locr_newsize */ +
2768 2 /* ns_size */) * sizeof(__be32);
2771 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2773 return (op_encode_hdr_size +
2774 1 /* lrs_stateid */ +
2775 op_encode_stateid_maxsz) * sizeof(__be32);
2777 #endif /* CONFIG_NFSD_PNFS */
2780 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2782 return (op_encode_hdr_size + 3) * sizeof(__be32);
2785 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2786 struct nfsd4_op *op)
2790 maxcount = svc_max_payload(rqstp);
2791 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2793 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2796 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2797 struct nfsd4_op *op)
2799 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2802 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2803 struct nfsd4_op *op)
2807 maxcount = svc_max_payload(rqstp);
2808 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2810 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2813 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2814 struct nfsd4_op *op)
2816 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2821 static const struct nfsd4_operation nfsd4_ops[] = {
2823 .op_func = nfsd4_access,
2824 .op_name = "OP_ACCESS",
2825 .op_rsize_bop = nfsd4_access_rsize,
2828 .op_func = nfsd4_close,
2829 .op_flags = OP_MODIFIES_SOMETHING,
2830 .op_name = "OP_CLOSE",
2831 .op_rsize_bop = nfsd4_status_stateid_rsize,
2832 .op_get_currentstateid = nfsd4_get_closestateid,
2833 .op_set_currentstateid = nfsd4_set_closestateid,
2836 .op_func = nfsd4_commit,
2837 .op_flags = OP_MODIFIES_SOMETHING,
2838 .op_name = "OP_COMMIT",
2839 .op_rsize_bop = nfsd4_commit_rsize,
2842 .op_func = nfsd4_create,
2843 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2844 .op_name = "OP_CREATE",
2845 .op_rsize_bop = nfsd4_create_rsize,
2847 [OP_DELEGRETURN] = {
2848 .op_func = nfsd4_delegreturn,
2849 .op_flags = OP_MODIFIES_SOMETHING,
2850 .op_name = "OP_DELEGRETURN",
2851 .op_rsize_bop = nfsd4_only_status_rsize,
2852 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2855 .op_func = nfsd4_getattr,
2856 .op_flags = ALLOWED_ON_ABSENT_FS,
2857 .op_rsize_bop = nfsd4_getattr_rsize,
2858 .op_name = "OP_GETATTR",
2861 .op_func = nfsd4_getfh,
2862 .op_name = "OP_GETFH",
2863 .op_rsize_bop = nfsd4_getfh_rsize,
2866 .op_func = nfsd4_link,
2867 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2869 .op_name = "OP_LINK",
2870 .op_rsize_bop = nfsd4_link_rsize,
2873 .op_func = nfsd4_lock,
2874 .op_flags = OP_MODIFIES_SOMETHING |
2875 OP_NONTRIVIAL_ERROR_ENCODE,
2876 .op_name = "OP_LOCK",
2877 .op_rsize_bop = nfsd4_lock_rsize,
2878 .op_set_currentstateid = nfsd4_set_lockstateid,
2881 .op_func = nfsd4_lockt,
2882 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2883 .op_name = "OP_LOCKT",
2884 .op_rsize_bop = nfsd4_lock_rsize,
2887 .op_func = nfsd4_locku,
2888 .op_flags = OP_MODIFIES_SOMETHING,
2889 .op_name = "OP_LOCKU",
2890 .op_rsize_bop = nfsd4_status_stateid_rsize,
2891 .op_get_currentstateid = nfsd4_get_lockustateid,
2894 .op_func = nfsd4_lookup,
2895 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2896 .op_name = "OP_LOOKUP",
2897 .op_rsize_bop = nfsd4_only_status_rsize,
2900 .op_func = nfsd4_lookupp,
2901 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2902 .op_name = "OP_LOOKUPP",
2903 .op_rsize_bop = nfsd4_only_status_rsize,
2906 .op_func = nfsd4_nverify,
2907 .op_name = "OP_NVERIFY",
2908 .op_rsize_bop = nfsd4_only_status_rsize,
2911 .op_func = nfsd4_open,
2912 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2913 .op_name = "OP_OPEN",
2914 .op_rsize_bop = nfsd4_open_rsize,
2915 .op_set_currentstateid = nfsd4_set_openstateid,
2917 [OP_OPEN_CONFIRM] = {
2918 .op_func = nfsd4_open_confirm,
2919 .op_flags = OP_MODIFIES_SOMETHING,
2920 .op_name = "OP_OPEN_CONFIRM",
2921 .op_rsize_bop = nfsd4_status_stateid_rsize,
2923 [OP_OPEN_DOWNGRADE] = {
2924 .op_func = nfsd4_open_downgrade,
2925 .op_flags = OP_MODIFIES_SOMETHING,
2926 .op_name = "OP_OPEN_DOWNGRADE",
2927 .op_rsize_bop = nfsd4_status_stateid_rsize,
2928 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2929 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2932 .op_func = nfsd4_putfh,
2933 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2934 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2935 .op_name = "OP_PUTFH",
2936 .op_rsize_bop = nfsd4_only_status_rsize,
2939 .op_func = nfsd4_putrootfh,
2940 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2941 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2942 .op_name = "OP_PUTPUBFH",
2943 .op_rsize_bop = nfsd4_only_status_rsize,
2946 .op_func = nfsd4_putrootfh,
2947 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2948 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2949 .op_name = "OP_PUTROOTFH",
2950 .op_rsize_bop = nfsd4_only_status_rsize,
2953 .op_func = nfsd4_read,
2954 .op_release = nfsd4_read_release,
2955 .op_name = "OP_READ",
2956 .op_rsize_bop = nfsd4_read_rsize,
2957 .op_get_currentstateid = nfsd4_get_readstateid,
2960 .op_func = nfsd4_readdir,
2961 .op_name = "OP_READDIR",
2962 .op_rsize_bop = nfsd4_readdir_rsize,
2965 .op_func = nfsd4_readlink,
2966 .op_name = "OP_READLINK",
2967 .op_rsize_bop = nfsd4_readlink_rsize,
2970 .op_func = nfsd4_remove,
2971 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2972 .op_name = "OP_REMOVE",
2973 .op_rsize_bop = nfsd4_remove_rsize,
2976 .op_func = nfsd4_rename,
2977 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2978 .op_name = "OP_RENAME",
2979 .op_rsize_bop = nfsd4_rename_rsize,
2982 .op_func = nfsd4_renew,
2983 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2984 | OP_MODIFIES_SOMETHING,
2985 .op_name = "OP_RENEW",
2986 .op_rsize_bop = nfsd4_only_status_rsize,
2990 .op_func = nfsd4_restorefh,
2991 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2992 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2993 .op_name = "OP_RESTOREFH",
2994 .op_rsize_bop = nfsd4_only_status_rsize,
2997 .op_func = nfsd4_savefh,
2998 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2999 .op_name = "OP_SAVEFH",
3000 .op_rsize_bop = nfsd4_only_status_rsize,
3003 .op_func = nfsd4_secinfo,
3004 .op_release = nfsd4_secinfo_release,
3005 .op_flags = OP_HANDLES_WRONGSEC,
3006 .op_name = "OP_SECINFO",
3007 .op_rsize_bop = nfsd4_secinfo_rsize,
3010 .op_func = nfsd4_setattr,
3011 .op_name = "OP_SETATTR",
3012 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3013 | OP_NONTRIVIAL_ERROR_ENCODE,
3014 .op_rsize_bop = nfsd4_setattr_rsize,
3015 .op_get_currentstateid = nfsd4_get_setattrstateid,
3017 [OP_SETCLIENTID] = {
3018 .op_func = nfsd4_setclientid,
3019 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3020 | OP_MODIFIES_SOMETHING | OP_CACHEME
3021 | OP_NONTRIVIAL_ERROR_ENCODE,
3022 .op_name = "OP_SETCLIENTID",
3023 .op_rsize_bop = nfsd4_setclientid_rsize,
3025 [OP_SETCLIENTID_CONFIRM] = {
3026 .op_func = nfsd4_setclientid_confirm,
3027 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3028 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3029 .op_name = "OP_SETCLIENTID_CONFIRM",
3030 .op_rsize_bop = nfsd4_only_status_rsize,
3033 .op_func = nfsd4_verify,
3034 .op_name = "OP_VERIFY",
3035 .op_rsize_bop = nfsd4_only_status_rsize,
3038 .op_func = nfsd4_write,
3039 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3040 .op_name = "OP_WRITE",
3041 .op_rsize_bop = nfsd4_write_rsize,
3042 .op_get_currentstateid = nfsd4_get_writestateid,
3044 [OP_RELEASE_LOCKOWNER] = {
3045 .op_func = nfsd4_release_lockowner,
3046 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3047 | OP_MODIFIES_SOMETHING,
3048 .op_name = "OP_RELEASE_LOCKOWNER",
3049 .op_rsize_bop = nfsd4_only_status_rsize,
3052 /* NFSv4.1 operations */
3053 [OP_EXCHANGE_ID] = {
3054 .op_func = nfsd4_exchange_id,
3055 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3056 | OP_MODIFIES_SOMETHING,
3057 .op_name = "OP_EXCHANGE_ID",
3058 .op_rsize_bop = nfsd4_exchange_id_rsize,
3060 [OP_BACKCHANNEL_CTL] = {
3061 .op_func = nfsd4_backchannel_ctl,
3062 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3063 .op_name = "OP_BACKCHANNEL_CTL",
3064 .op_rsize_bop = nfsd4_only_status_rsize,
3066 [OP_BIND_CONN_TO_SESSION] = {
3067 .op_func = nfsd4_bind_conn_to_session,
3068 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3069 | OP_MODIFIES_SOMETHING,
3070 .op_name = "OP_BIND_CONN_TO_SESSION",
3071 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3073 [OP_CREATE_SESSION] = {
3074 .op_func = nfsd4_create_session,
3075 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3076 | OP_MODIFIES_SOMETHING,
3077 .op_name = "OP_CREATE_SESSION",
3078 .op_rsize_bop = nfsd4_create_session_rsize,
3080 [OP_DESTROY_SESSION] = {
3081 .op_func = nfsd4_destroy_session,
3082 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3083 | OP_MODIFIES_SOMETHING,
3084 .op_name = "OP_DESTROY_SESSION",
3085 .op_rsize_bop = nfsd4_only_status_rsize,
3088 .op_func = nfsd4_sequence,
3089 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3090 .op_name = "OP_SEQUENCE",
3091 .op_rsize_bop = nfsd4_sequence_rsize,
3093 [OP_DESTROY_CLIENTID] = {
3094 .op_func = nfsd4_destroy_clientid,
3095 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3096 | OP_MODIFIES_SOMETHING,
3097 .op_name = "OP_DESTROY_CLIENTID",
3098 .op_rsize_bop = nfsd4_only_status_rsize,
3100 [OP_RECLAIM_COMPLETE] = {
3101 .op_func = nfsd4_reclaim_complete,
3102 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3103 .op_name = "OP_RECLAIM_COMPLETE",
3104 .op_rsize_bop = nfsd4_only_status_rsize,
3106 [OP_SECINFO_NO_NAME] = {
3107 .op_func = nfsd4_secinfo_no_name,
3108 .op_release = nfsd4_secinfo_no_name_release,
3109 .op_flags = OP_HANDLES_WRONGSEC,
3110 .op_name = "OP_SECINFO_NO_NAME",
3111 .op_rsize_bop = nfsd4_secinfo_rsize,
3113 [OP_TEST_STATEID] = {
3114 .op_func = nfsd4_test_stateid,
3115 .op_flags = ALLOWED_WITHOUT_FH,
3116 .op_name = "OP_TEST_STATEID",
3117 .op_rsize_bop = nfsd4_test_stateid_rsize,
3119 [OP_FREE_STATEID] = {
3120 .op_func = nfsd4_free_stateid,
3121 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3122 .op_name = "OP_FREE_STATEID",
3123 .op_get_currentstateid = nfsd4_get_freestateid,
3124 .op_rsize_bop = nfsd4_only_status_rsize,
3126 #ifdef CONFIG_NFSD_PNFS
3127 [OP_GETDEVICEINFO] = {
3128 .op_func = nfsd4_getdeviceinfo,
3129 .op_release = nfsd4_getdeviceinfo_release,
3130 .op_flags = ALLOWED_WITHOUT_FH,
3131 .op_name = "OP_GETDEVICEINFO",
3132 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3135 .op_func = nfsd4_layoutget,
3136 .op_release = nfsd4_layoutget_release,
3137 .op_flags = OP_MODIFIES_SOMETHING,
3138 .op_name = "OP_LAYOUTGET",
3139 .op_rsize_bop = nfsd4_layoutget_rsize,
3141 [OP_LAYOUTCOMMIT] = {
3142 .op_func = nfsd4_layoutcommit,
3143 .op_flags = OP_MODIFIES_SOMETHING,
3144 .op_name = "OP_LAYOUTCOMMIT",
3145 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3147 [OP_LAYOUTRETURN] = {
3148 .op_func = nfsd4_layoutreturn,
3149 .op_flags = OP_MODIFIES_SOMETHING,
3150 .op_name = "OP_LAYOUTRETURN",
3151 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3153 #endif /* CONFIG_NFSD_PNFS */
3155 /* NFSv4.2 operations */
3157 .op_func = nfsd4_allocate,
3158 .op_flags = OP_MODIFIES_SOMETHING,
3159 .op_name = "OP_ALLOCATE",
3160 .op_rsize_bop = nfsd4_only_status_rsize,
3163 .op_func = nfsd4_deallocate,
3164 .op_flags = OP_MODIFIES_SOMETHING,
3165 .op_name = "OP_DEALLOCATE",
3166 .op_rsize_bop = nfsd4_only_status_rsize,
3169 .op_func = nfsd4_clone,
3170 .op_flags = OP_MODIFIES_SOMETHING,
3171 .op_name = "OP_CLONE",
3172 .op_rsize_bop = nfsd4_only_status_rsize,
3175 .op_func = nfsd4_copy,
3176 .op_flags = OP_MODIFIES_SOMETHING,
3177 .op_name = "OP_COPY",
3178 .op_rsize_bop = nfsd4_copy_rsize,
3181 .op_func = nfsd4_read,
3182 .op_release = nfsd4_read_release,
3183 .op_name = "OP_READ_PLUS",
3184 .op_rsize_bop = nfsd4_read_plus_rsize,
3185 .op_get_currentstateid = nfsd4_get_readstateid,
3188 .op_func = nfsd4_seek,
3189 .op_name = "OP_SEEK",
3190 .op_rsize_bop = nfsd4_seek_rsize,
3192 [OP_OFFLOAD_STATUS] = {
3193 .op_func = nfsd4_offload_status,
3194 .op_name = "OP_OFFLOAD_STATUS",
3195 .op_rsize_bop = nfsd4_offload_status_rsize,
3197 [OP_OFFLOAD_CANCEL] = {
3198 .op_func = nfsd4_offload_cancel,
3199 .op_flags = OP_MODIFIES_SOMETHING,
3200 .op_name = "OP_OFFLOAD_CANCEL",
3201 .op_rsize_bop = nfsd4_only_status_rsize,
3203 [OP_COPY_NOTIFY] = {
3204 .op_func = nfsd4_copy_notify,
3205 .op_flags = OP_MODIFIES_SOMETHING,
3206 .op_name = "OP_COPY_NOTIFY",
3207 .op_rsize_bop = nfsd4_copy_notify_rsize,
3210 .op_func = nfsd4_getxattr,
3211 .op_name = "OP_GETXATTR",
3212 .op_rsize_bop = nfsd4_getxattr_rsize,
3215 .op_func = nfsd4_setxattr,
3216 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3217 .op_name = "OP_SETXATTR",
3218 .op_rsize_bop = nfsd4_setxattr_rsize,
3221 .op_func = nfsd4_listxattrs,
3222 .op_name = "OP_LISTXATTRS",
3223 .op_rsize_bop = nfsd4_listxattrs_rsize,
3225 [OP_REMOVEXATTR] = {
3226 .op_func = nfsd4_removexattr,
3227 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3228 .op_name = "OP_REMOVEXATTR",
3229 .op_rsize_bop = nfsd4_removexattr_rsize,
3234 * nfsd4_spo_must_allow - Determine if the compound op contains an
3235 * operation that is allowed to be sent with machine credentials
3237 * @rqstp: a pointer to the struct svc_rqst
3239 * Checks to see if the compound contains a spo_must_allow op
3240 * and confirms that it was sent with the proper machine creds.
3243 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3245 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3246 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3247 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3248 struct nfsd4_compound_state *cstate = &resp->cstate;
3249 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3252 if (!cstate->minorversion)
3255 if (cstate->spo_must_allowed)
3258 opiter = resp->opcnt;
3259 while (opiter < argp->opcnt) {
3260 this = &argp->ops[opiter++];
3261 if (test_bit(this->opnum, allow->u.longs) &&
3262 cstate->clp->cl_mach_cred &&
3263 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3264 cstate->spo_must_allowed = true;
3268 cstate->spo_must_allowed = false;
3272 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3274 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3275 return op_encode_hdr_size * sizeof(__be32);
3277 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3278 return OPDESC(op)->op_rsize_bop(rqstp, op);
3281 void warn_on_nonidempotent_op(struct nfsd4_op *op)
3283 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3284 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
3285 op->opnum, nfsd4_op_name(op->opnum));
3290 static const char *nfsd4_op_name(unsigned opnum)
3292 if (opnum < ARRAY_SIZE(nfsd4_ops))
3293 return nfsd4_ops[opnum].op_name;
3294 return "unknown_operation";
3297 #define nfsd4_voidres nfsd4_voidargs
3298 struct nfsd4_voidargs { int dummy; };
3300 static const struct svc_procedure nfsd_procedures4[2] = {
3302 .pc_func = nfsd4_proc_null,
3303 .pc_decode = nfs4svc_decode_voidarg,
3304 .pc_encode = nfs4svc_encode_voidres,
3305 .pc_argsize = sizeof(struct nfsd4_voidargs),
3306 .pc_ressize = sizeof(struct nfsd4_voidres),
3307 .pc_cachetype = RC_NOCACHE,
3310 [NFSPROC4_COMPOUND] = {
3311 .pc_func = nfsd4_proc_compound,
3312 .pc_decode = nfs4svc_decode_compoundargs,
3313 .pc_encode = nfs4svc_encode_compoundres,
3314 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3315 .pc_ressize = sizeof(struct nfsd4_compoundres),
3316 .pc_release = nfsd4_release_compoundargs,
3317 .pc_cachetype = RC_NOCACHE,
3318 .pc_xdrressize = NFSD_BUFSIZE/4,
3322 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3323 const struct svc_version nfsd_version4 = {
3326 .vs_proc = nfsd_procedures4,
3327 .vs_count = nfsd_count3,
3328 .vs_dispatch = nfsd_dispatch,
3329 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3330 .vs_rpcb_optnl = true,
3331 .vs_need_cong_ctrl = true,