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>
46 #include "current_stateid.h"
52 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
53 #include <linux/security.h>
56 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
58 struct inode *inode = d_inode(resfh->fh_dentry);
62 status = security_inode_setsecctx(resfh->fh_dentry,
63 label->data, label->len);
68 * XXX: We should really fail the whole open, but we may
69 * already have created a new file, so it may be too
70 * late. For now this seems the least of evils:
72 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
78 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
82 #define NFSDDBG_FACILITY NFSDDBG_PROC
84 static u32 nfsd_attrmask[] = {
85 NFSD_WRITEABLE_ATTRS_WORD0,
86 NFSD_WRITEABLE_ATTRS_WORD1,
87 NFSD_WRITEABLE_ATTRS_WORD2
90 static u32 nfsd41_ex_attrmask[] = {
91 NFSD_SUPPATTR_EXCLCREAT_WORD0,
92 NFSD_SUPPATTR_EXCLCREAT_WORD1,
93 NFSD_SUPPATTR_EXCLCREAT_WORD2
97 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
98 u32 *bmval, u32 *writable)
100 struct dentry *dentry = cstate->current_fh.fh_dentry;
101 struct svc_export *exp = cstate->current_fh.fh_export;
103 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
104 return nfserr_attrnotsupp;
105 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
106 return nfserr_attrnotsupp;
107 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
108 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
109 return nfserr_attrnotsupp;
110 if (writable && !bmval_is_subset(bmval, writable))
112 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
113 (bmval[1] & FATTR4_WORD1_MODE))
119 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
120 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
122 __be32 status = nfs_ok;
124 if (open->op_create == NFS4_OPEN_CREATE) {
125 if (open->op_createmode == NFS4_CREATE_UNCHECKED
126 || open->op_createmode == NFS4_CREATE_GUARDED)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd_attrmask);
129 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
130 status = check_attr_support(rqstp, cstate,
131 open->op_bmval, nfsd41_ex_attrmask);
138 is_create_with_attrs(struct nfsd4_open *open)
140 return open->op_create == NFS4_OPEN_CREATE
141 && (open->op_createmode == NFS4_CREATE_UNCHECKED
142 || open->op_createmode == NFS4_CREATE_GUARDED
143 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
147 * if error occurs when setting the acl, just clear the acl bit
148 * in the returned attr bitmap.
151 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
152 struct nfs4_acl *acl, u32 *bmval)
156 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
159 * We should probably fail the whole open at this point,
160 * but we've already created the file, so it's too late;
161 * So this seems the least of evils:
163 bmval[0] &= ~FATTR4_WORD0_ACL;
167 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
170 dget(src->fh_dentry);
172 exp_get(src->fh_export);
177 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
181 if (open->op_truncate &&
182 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
185 accmode |= NFSD_MAY_READ_IF_EXEC;
187 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
188 accmode |= NFSD_MAY_READ;
189 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
190 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
191 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
192 accmode |= NFSD_MAY_WRITE;
194 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
199 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
201 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
208 * Using err_symlink as our catch-all case may look odd; but
209 * there's no other obvious error for this case in 4.0, and we
210 * happen to know that it will cause the linux v4 client to do
211 * the right thing on attempts to open something other than a
214 return nfserr_symlink;
217 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
219 if (nfsd4_has_session(cstate))
221 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
226 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
228 struct svc_fh *current_fh = &cstate->current_fh;
232 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
234 return nfserr_jukebox;
235 fh_init(*resfh, NFS4_FHSIZE);
236 open->op_truncate = false;
238 if (open->op_create) {
239 /* FIXME: check session persistence and pnfs flags.
240 * The nfsv4.1 spec requires the following semantics:
242 * Persistent | pNFS | Server REQUIRED | Client Allowed
243 * Reply Cache | server | |
244 * -------------+--------+-----------------+--------------------
245 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
247 * | | and EXCLUSIVE4 | or EXCLUSIVE4
249 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
250 * yes | no | GUARDED4 | GUARDED4
251 * yes | yes | GUARDED4 | GUARDED4
255 * Note: create modes (UNCHECKED,GUARDED...) are the same
256 * in NFSv4 as in v3 except EXCLUSIVE4_1.
258 current->fs->umask = open->op_umask;
259 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
260 open->op_fname.len, &open->op_iattr,
261 *resfh, open->op_createmode,
262 (u32 *)open->op_verf.data,
263 &open->op_truncate, &open->op_created);
264 current->fs->umask = 0;
266 if (!status && open->op_label.len)
267 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
270 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
271 * use the returned bitmask to indicate which attributes
272 * we used to store the verifier:
274 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
275 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
276 FATTR4_WORD1_TIME_MODIFY);
279 * Note this may exit with the parent still locked.
280 * We will hold the lock until nfsd4_open's final
281 * lookup, to prevent renames or unlinks until we've had
282 * a chance to an acquire a delegation if appropriate.
284 status = nfsd_lookup(rqstp, current_fh,
285 open->op_fname.data, open->op_fname.len, *resfh);
288 status = nfsd_check_obj_isreg(*resfh);
292 if (is_create_with_attrs(open) && open->op_acl != NULL)
293 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
295 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
296 accmode = NFSD_MAY_NOP;
297 if (open->op_created ||
298 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
299 accmode |= NFSD_MAY_OWNER_OVERRIDE;
300 status = do_open_permission(rqstp, *resfh, open, accmode);
301 set_change_info(&open->op_cinfo, current_fh);
307 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
309 struct svc_fh *current_fh = &cstate->current_fh;
313 /* We don't know the target directory, and therefore can not
314 * set the change info
317 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
319 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
321 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
322 (open->op_iattr.ia_size == 0);
324 * In the delegation case, the client is telling us about an
325 * open that it *already* performed locally, some time ago. We
326 * should let it succeed now if possible.
328 * In the case of a CLAIM_FH open, on the other hand, the client
329 * may be counting on us to enforce permissions (the Linux 4.1
330 * client uses this for normal opens, for example).
332 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
333 accmode = NFSD_MAY_OWNER_OVERRIDE;
335 status = do_open_permission(rqstp, current_fh, open, accmode);
341 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
343 struct nfsd4_sessionid *sid =
344 (struct nfsd4_sessionid *)session->se_sessionid.data;
346 clid->cl_boot = sid->clientid.cl_boot;
347 clid->cl_id = sid->clientid.cl_id;
351 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
354 struct nfsd4_open *open = &u->open;
356 struct svc_fh *resfh = NULL;
357 struct net *net = SVC_NET(rqstp);
358 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
359 bool reclaim = false;
361 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
362 (int)open->op_fname.len, open->op_fname.data,
365 /* This check required by spec. */
366 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
369 open->op_created = false;
372 * Before RECLAIM_COMPLETE done, server should deny new lock
374 if (nfsd4_has_session(cstate) &&
375 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
376 &cstate->session->se_client->cl_flags) &&
377 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
380 if (nfsd4_has_session(cstate))
381 copy_clientid(&open->op_clientid, cstate->session);
383 /* check seqid for replay. set nfs4_owner */
384 status = nfsd4_process_open1(cstate, open, nn);
385 if (status == nfserr_replay_me) {
386 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
387 fh_put(&cstate->current_fh);
388 fh_copy_shallow(&cstate->current_fh.fh_handle,
390 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
392 dprintk("nfsd4_open: replay failed"
393 " restoring previous filehandle\n");
395 status = nfserr_replay_me;
399 if (open->op_xdr_error) {
400 status = open->op_xdr_error;
404 status = nfsd4_check_open_attributes(rqstp, cstate, open);
408 /* Openowner is now set, so sequence id will get bumped. Now we need
409 * these checks before we do any creates: */
410 status = nfserr_grace;
411 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
413 status = nfserr_no_grace;
414 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
417 switch (open->op_claim_type) {
418 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
419 case NFS4_OPEN_CLAIM_NULL:
420 status = do_open_lookup(rqstp, cstate, open, &resfh);
424 case NFS4_OPEN_CLAIM_PREVIOUS:
425 status = nfs4_check_open_reclaim(&open->op_clientid,
429 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
432 case NFS4_OPEN_CLAIM_FH:
433 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
434 status = do_open_fhandle(rqstp, cstate, open);
437 resfh = &cstate->current_fh;
439 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
440 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
441 dprintk("NFSD: unsupported OPEN claim type %d\n",
442 open->op_claim_type);
443 status = nfserr_notsupp;
446 dprintk("NFSD: Invalid OPEN claim type %d\n",
447 open->op_claim_type);
448 status = nfserr_inval;
452 * nfsd4_process_open2() does the actual opening of the file. If
453 * successful, it (1) truncates the file if open->op_truncate was
454 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
456 status = nfsd4_process_open2(rqstp, resfh, open);
457 WARN(status && open->op_created,
458 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
459 be32_to_cpu(status));
460 if (reclaim && !status)
461 nn->somebody_reclaimed = true;
463 if (resfh && resfh != &cstate->current_fh) {
464 fh_dup2(&cstate->current_fh, resfh);
468 nfsd4_cleanup_open_state(cstate, open);
469 nfsd4_bump_seqid(cstate, status);
474 * OPEN is the only seqid-mutating operation whose decoding can fail
475 * with a seqid-mutating error (specifically, decoding of user names in
476 * the attributes). Therefore we have to do some processing to look up
477 * the stateowner so that we can bump the seqid.
479 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
481 struct nfsd4_open *open = &op->u.open;
483 if (!seqid_mutating_err(ntohl(op->status)))
485 if (nfsd4_has_session(cstate))
487 open->op_xdr_error = op->status;
488 return nfsd4_open(rqstp, cstate, &op->u);
492 * filehandle-manipulating ops.
495 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
498 u->getfh = &cstate->current_fh;
503 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
506 struct nfsd4_putfh *putfh = &u->putfh;
509 fh_put(&cstate->current_fh);
510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
513 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
514 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
515 if (ret == nfserr_stale && putfh->no_verify) {
516 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
524 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
529 fh_put(&cstate->current_fh);
530 status = exp_pseudoroot(rqstp, &cstate->current_fh);
535 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
538 if (!cstate->save_fh.fh_dentry)
539 return nfserr_restorefh;
541 fh_dup2(&cstate->current_fh, &cstate->save_fh);
542 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
543 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
544 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
550 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
553 fh_dup2(&cstate->save_fh, &cstate->current_fh);
554 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
555 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
556 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
565 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
568 struct nfsd4_access *access = &u->access;
571 access_full = NFS3_ACCESS_FULL;
572 if (cstate->minorversion >= 2)
573 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
576 if (access->ac_req_access & ~access_full)
579 access->ac_resp_access = access->ac_req_access;
580 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
581 &access->ac_supported);
584 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
586 __be32 *verf = (__be32 *)verifier->data;
588 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
590 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
594 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
597 struct nfsd4_commit *commit = &u->commit;
599 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
601 (__be32 *)commit->co_verf.data);
605 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
608 struct nfsd4_create *create = &u->create;
613 fh_init(&resfh, NFS4_FHSIZE);
615 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
619 status = check_attr_support(rqstp, cstate, create->cr_bmval,
624 current->fs->umask = create->cr_umask;
625 switch (create->cr_type) {
627 status = nfsd_symlink(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
629 create->cr_data, &resfh);
633 status = nfserr_inval;
634 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
635 if (MAJOR(rdev) != create->cr_specdata1 ||
636 MINOR(rdev) != create->cr_specdata2)
638 status = nfsd_create(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 &create->cr_iattr, S_IFBLK, rdev, &resfh);
644 status = nfserr_inval;
645 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
646 if (MAJOR(rdev) != create->cr_specdata1 ||
647 MINOR(rdev) != create->cr_specdata2)
649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr,S_IFCHR, rdev, &resfh);
655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr, S_IFSOCK, 0, &resfh);
661 status = nfsd_create(rqstp, &cstate->current_fh,
662 create->cr_name, create->cr_namelen,
663 &create->cr_iattr, S_IFIFO, 0, &resfh);
667 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
668 status = nfsd_create(rqstp, &cstate->current_fh,
669 create->cr_name, create->cr_namelen,
670 &create->cr_iattr, S_IFDIR, 0, &resfh);
674 status = nfserr_badtype;
680 if (create->cr_label.len)
681 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
683 if (create->cr_acl != NULL)
684 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
687 fh_unlock(&cstate->current_fh);
688 set_change_info(&create->cr_cinfo, &cstate->current_fh);
689 fh_dup2(&cstate->current_fh, &resfh);
693 current->fs->umask = 0;
698 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
701 struct nfsd4_getattr *getattr = &u->getattr;
704 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
708 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
711 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
712 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
713 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
715 getattr->ga_fhp = &cstate->current_fh;
720 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
723 struct nfsd4_link *link = &u->link;
726 status = nfsd_link(rqstp, &cstate->current_fh,
727 link->li_name, link->li_namelen, &cstate->save_fh);
729 set_change_info(&link->li_cinfo, &cstate->current_fh);
733 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
735 struct svc_fh tmp_fh;
738 fh_init(&tmp_fh, NFS4_FHSIZE);
739 ret = exp_pseudoroot(rqstp, &tmp_fh);
742 if (tmp_fh.fh_dentry == fh->fh_dentry) {
747 return nfsd_lookup(rqstp, fh, "..", 2, fh);
751 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
754 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
758 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
761 return nfsd_lookup(rqstp, &cstate->current_fh,
762 u->lookup.lo_name, u->lookup.lo_len,
763 &cstate->current_fh);
767 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
770 struct nfsd4_read *read = &u->read;
774 if (read->rd_offset >= OFFSET_MAX)
777 trace_nfsd_read_start(rqstp, &cstate->current_fh,
778 read->rd_offset, read->rd_length);
781 * If we do a zero copy read, then a client will see read data
782 * that reflects the state of the file *after* performing the
783 * following compound.
785 * To ensure proper ordering, we therefore turn off zero copy if
786 * the client wants us to do more in this compound:
788 if (!nfsd4_last_compound_op(rqstp))
789 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
792 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
793 &read->rd_stateid, RD_STATE,
796 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
801 read->rd_rqstp = rqstp;
802 read->rd_fhp = &cstate->current_fh;
808 nfsd4_read_release(union nfsd4_op_u *u)
811 nfsd_file_put(u->read.rd_nf);
812 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
813 u->read.rd_offset, u->read.rd_length);
817 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
820 struct nfsd4_readdir *readdir = &u->readdir;
821 u64 cookie = readdir->rd_cookie;
822 static const nfs4_verifier zeroverf;
824 /* no need to check permission - this will be done in nfsd_readdir() */
826 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
829 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
830 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
831 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
833 if ((cookie == 1) || (cookie == 2) ||
834 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
835 return nfserr_bad_cookie;
837 readdir->rd_rqstp = rqstp;
838 readdir->rd_fhp = &cstate->current_fh;
843 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
846 u->readlink.rl_rqstp = rqstp;
847 u->readlink.rl_fhp = &cstate->current_fh;
852 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
855 struct nfsd4_remove *remove = &u->remove;
858 if (opens_in_grace(SVC_NET(rqstp)))
860 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
861 remove->rm_name, remove->rm_namelen);
863 fh_unlock(&cstate->current_fh);
864 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
870 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
873 struct nfsd4_rename *rename = &u->rename;
876 if (opens_in_grace(SVC_NET(rqstp)))
878 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
879 rename->rn_snamelen, &cstate->current_fh,
880 rename->rn_tname, rename->rn_tnamelen);
883 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
884 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
889 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
892 struct nfsd4_secinfo *secinfo = &u->secinfo;
893 struct svc_export *exp;
894 struct dentry *dentry;
897 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
900 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
901 secinfo->si_name, secinfo->si_namelen,
905 fh_unlock(&cstate->current_fh);
906 if (d_really_is_negative(dentry)) {
910 secinfo->si_exp = exp;
912 if (cstate->minorversion)
913 /* See rfc 5661 section 2.6.3.1.1.8 */
914 fh_put(&cstate->current_fh);
919 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
924 switch (u->secinfo_no_name.sin_style) {
925 case NFS4_SECINFO_STYLE4_CURRENT_FH:
927 case NFS4_SECINFO_STYLE4_PARENT:
928 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
936 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
937 fh_put(&cstate->current_fh);
942 nfsd4_secinfo_release(union nfsd4_op_u *u)
944 if (u->secinfo.si_exp)
945 exp_put(u->secinfo.si_exp);
949 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
951 if (u->secinfo_no_name.sin_exp)
952 exp_put(u->secinfo_no_name.sin_exp);
956 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
959 struct nfsd4_setattr *setattr = &u->setattr;
960 __be32 status = nfs_ok;
963 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
964 status = nfs4_preprocess_stateid_op(rqstp, cstate,
965 &cstate->current_fh, &setattr->sa_stateid,
966 WR_STATE, NULL, NULL);
968 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
972 err = fh_want_write(&cstate->current_fh);
974 return nfserrno(err);
977 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
982 if (setattr->sa_acl != NULL)
983 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
987 if (setattr->sa_label.len)
988 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
992 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
995 fh_drop_write(&cstate->current_fh);
1000 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1001 union nfsd4_op_u *u)
1003 struct nfsd4_write *write = &u->write;
1004 stateid_t *stateid = &write->wr_stateid;
1005 struct nfsd_file *nf = NULL;
1006 __be32 status = nfs_ok;
1010 if (write->wr_offset >= OFFSET_MAX)
1011 return nfserr_inval;
1013 cnt = write->wr_buflen;
1014 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1015 write->wr_offset, cnt);
1016 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1017 stateid, WR_STATE, &nf, NULL);
1019 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1023 write->wr_how_written = write->wr_stable_how;
1025 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1026 &write->wr_head, write->wr_buflen);
1027 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1029 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1030 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1031 write->wr_how_written,
1032 (__be32 *)write->wr_verifier.data);
1035 write->wr_bytes_written = cnt;
1036 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1037 write->wr_offset, cnt);
1042 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1043 stateid_t *src_stateid, struct nfsd_file **src,
1044 stateid_t *dst_stateid, struct nfsd_file **dst)
1048 if (!cstate->save_fh.fh_dentry)
1049 return nfserr_nofilehandle;
1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1052 src_stateid, RD_STATE, src, NULL);
1054 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1058 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1059 dst_stateid, WR_STATE, dst, NULL);
1061 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1065 /* fix up for NFS-specific error code */
1066 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1067 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1068 status = nfserr_wrong_type;
1075 nfsd_file_put(*dst);
1077 nfsd_file_put(*src);
1082 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1083 union nfsd4_op_u *u)
1085 struct nfsd4_clone *clone = &u->clone;
1086 struct nfsd_file *src, *dst;
1089 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1090 &clone->cl_dst_stateid, &dst);
1094 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1095 dst, clone->cl_dst_pos, clone->cl_count,
1096 EX_ISSYNC(cstate->current_fh.fh_export));
1104 void nfs4_put_copy(struct nfsd4_copy *copy)
1106 if (!refcount_dec_and_test(©->refcount))
1112 check_and_set_stop_copy(struct nfsd4_copy *copy)
1116 spin_lock(©->cp_clp->async_lock);
1117 value = copy->stopped;
1119 copy->stopped = true;
1120 spin_unlock(©->cp_clp->async_lock);
1124 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1126 /* only 1 thread should stop the copy */
1127 if (!check_and_set_stop_copy(copy))
1128 kthread_stop(copy->copy_task);
1129 nfs4_put_copy(copy);
1132 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1134 struct nfsd4_copy *copy = NULL;
1136 spin_lock(&clp->async_lock);
1137 if (!list_empty(&clp->async_copies)) {
1138 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1140 refcount_inc(©->refcount);
1142 spin_unlock(&clp->async_lock);
1146 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1148 struct nfsd4_copy *copy;
1150 while ((copy = nfsd4_get_copy(clp)) != NULL)
1151 nfsd4_stop_copy(copy);
1153 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
1155 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1156 struct nfs_fh *src_fh,
1157 nfs4_stateid *stateid);
1158 extern void nfs42_ssc_close(struct file *filep);
1160 extern void nfs_sb_deactive(struct super_block *sb);
1162 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1165 * Support one copy source server for now.
1168 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1169 struct vfsmount **mount)
1171 struct file_system_type *type;
1172 struct vfsmount *ss_mnt;
1173 struct nfs42_netaddr *naddr;
1174 struct sockaddr_storage tmp_addr;
1175 size_t tmp_addrlen, match_netid_len = 3;
1176 char *startsep = "", *endsep = "", *match_netid = "tcp";
1177 char *ipaddr, *dev_name, *raw_data;
1179 __be32 status = nfserr_inval;
1181 naddr = &nss->u.nl4_addr;
1182 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1184 (struct sockaddr *)&tmp_addr,
1186 if (tmp_addrlen == 0)
1189 if (tmp_addr.ss_family == AF_INET6) {
1192 match_netid = "tcp6";
1193 match_netid_len = 4;
1196 if (naddr->netid_len != match_netid_len ||
1197 strncmp(naddr->netid, match_netid, naddr->netid_len))
1200 /* Construct the raw data for the vfs_kern_mount call */
1201 len = RPC_MAX_ADDRBUFLEN + 1;
1202 ipaddr = kzalloc(len, GFP_KERNEL);
1206 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1208 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1210 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1211 raw_data = kzalloc(raw_len, GFP_KERNEL);
1213 goto out_free_ipaddr;
1215 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1217 status = nfserr_nodev;
1218 type = get_fs_type("nfs");
1220 goto out_free_rawdata;
1222 /* Set the server:<export> for the vfs_kern_mount call */
1223 dev_name = kzalloc(len + 5, GFP_KERNEL);
1225 goto out_free_rawdata;
1226 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1228 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1229 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1230 module_put(type->owner);
1232 goto out_free_devname;
1248 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1250 nfs_sb_deactive(ss_mnt->mnt_sb);
1255 * Verify COPY destination stateid.
1257 * Connect to the source server with NFSv4.1.
1258 * Create the source struct file for nfsd_copy_range.
1259 * Called with COPY cstate:
1260 * SAVED_FH: source filehandle
1261 * CURRENT_FH: destination filehandle
1264 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1265 struct nfsd4_compound_state *cstate,
1266 struct nfsd4_copy *copy, struct vfsmount **mount)
1268 struct svc_fh *s_fh = NULL;
1269 stateid_t *s_stid = ©->cp_src_stateid;
1270 __be32 status = nfserr_inval;
1272 /* Verify the destination stateid and set dst struct file*/
1273 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1274 ©->cp_dst_stateid,
1275 WR_STATE, ©->nf_dst, NULL);
1279 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
1283 s_fh = &cstate->save_fh;
1285 copy->c_fh.size = s_fh->fh_handle.fh_size;
1286 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
1287 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1288 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1289 sizeof(stateid_opaque_t));
1297 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1298 struct nfsd_file *dst)
1300 nfs42_ssc_close(src->nf_file);
1306 #else /* CONFIG_NFSD_V4_2_INTER_SSC */
1309 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1310 struct nfsd4_compound_state *cstate,
1311 struct nfsd4_copy *copy,
1312 struct vfsmount **mount)
1315 return nfserr_inval;
1319 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1320 struct nfsd_file *dst)
1325 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1329 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1330 struct nfs_fh *src_fh,
1331 nfs4_stateid *stateid)
1335 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1338 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1339 struct nfsd4_compound_state *cstate,
1340 struct nfsd4_copy *copy)
1342 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1343 ©->nf_src, ©->cp_dst_stateid,
1348 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1354 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1356 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1358 nfs4_put_copy(copy);
1361 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1362 struct rpc_task *task)
1367 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1368 .release = nfsd4_cb_offload_release,
1369 .done = nfsd4_cb_offload_done
1372 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1374 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1375 copy->cp_synchronous = sync;
1376 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1379 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1381 ssize_t bytes_copied = 0;
1382 size_t bytes_total = copy->cp_count;
1383 u64 src_pos = copy->cp_src_pos;
1384 u64 dst_pos = copy->cp_dst_pos;
1387 if (kthread_should_stop())
1389 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1390 src_pos, copy->nf_dst->nf_file, dst_pos,
1392 if (bytes_copied <= 0)
1394 bytes_total -= bytes_copied;
1395 copy->cp_res.wr_bytes_written += bytes_copied;
1396 src_pos += bytes_copied;
1397 dst_pos += bytes_copied;
1398 } while (bytes_total > 0 && !copy->cp_synchronous);
1399 return bytes_copied;
1402 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1407 bytes = _nfsd_copy_file_range(copy);
1408 /* for async copy, we ignore the error, client can always retry
1411 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1412 status = nfserrno(bytes);
1414 nfsd4_init_copy_res(copy, sync);
1418 if (!copy->cp_intra) /* Inter server SSC */
1419 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1422 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1427 static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1429 dst->cp_src_pos = src->cp_src_pos;
1430 dst->cp_dst_pos = src->cp_dst_pos;
1431 dst->cp_count = src->cp_count;
1432 dst->cp_synchronous = src->cp_synchronous;
1433 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1434 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1435 dst->cp_clp = src->cp_clp;
1436 dst->nf_dst = nfsd_file_get(src->nf_dst);
1437 dst->cp_intra = src->cp_intra;
1438 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1439 dst->nf_src = nfsd_file_get(src->nf_src);
1441 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1442 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1443 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1444 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1445 dst->ss_mnt = src->ss_mnt;
1450 static void cleanup_async_copy(struct nfsd4_copy *copy)
1452 nfs4_free_copy_state(copy);
1453 nfsd_file_put(copy->nf_dst);
1455 nfsd_file_put(copy->nf_src);
1456 spin_lock(©->cp_clp->async_lock);
1457 list_del(©->copies);
1458 spin_unlock(©->cp_clp->async_lock);
1459 nfs4_put_copy(copy);
1462 static int nfsd4_do_async_copy(void *data)
1464 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1465 struct nfsd4_copy *cb_copy;
1467 if (!copy->cp_intra) { /* Inter server SSC */
1468 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1469 if (!copy->nf_src) {
1470 copy->nfserr = nfserr_serverfault;
1471 nfsd4_interssc_disconnect(copy->ss_mnt);
1474 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1476 if (IS_ERR(copy->nf_src->nf_file)) {
1477 copy->nfserr = nfserr_offload_denied;
1478 nfsd4_interssc_disconnect(copy->ss_mnt);
1483 copy->nfserr = nfsd4_do_copy(copy, 0);
1485 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1488 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1489 cb_copy->cp_clp = copy->cp_clp;
1490 cb_copy->nfserr = copy->nfserr;
1491 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1492 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1493 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1494 nfsd4_run_cb(&cb_copy->cp_cb);
1496 if (!copy->cp_intra)
1497 kfree(copy->nf_src);
1498 cleanup_async_copy(copy);
1503 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1504 union nfsd4_op_u *u)
1506 struct nfsd4_copy *copy = &u->copy;
1508 struct nfsd4_copy *async_copy = NULL;
1510 if (!copy->cp_intra) { /* Inter server SSC */
1511 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1512 status = nfserr_notsupp;
1515 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1518 return nfserr_offload_denied;
1520 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1525 copy->cp_clp = cstate->clp;
1526 memcpy(©->fh, &cstate->current_fh.fh_handle,
1527 sizeof(struct knfsd_fh));
1528 if (!copy->cp_synchronous) {
1529 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1531 status = nfserrno(-ENOMEM);
1532 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1535 if (!nfs4_init_copy_state(nn, copy))
1537 refcount_set(&async_copy->refcount, 1);
1538 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1539 sizeof(copy->cp_stateid));
1540 status = dup_copy_fields(copy, async_copy);
1543 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1544 async_copy, "%s", "copy thread");
1545 if (IS_ERR(async_copy->copy_task))
1547 spin_lock(&async_copy->cp_clp->async_lock);
1548 list_add(&async_copy->copies,
1549 &async_copy->cp_clp->async_copies);
1550 spin_unlock(&async_copy->cp_clp->async_lock);
1551 wake_up_process(async_copy->copy_task);
1554 status = nfsd4_do_copy(copy, 1);
1560 cleanup_async_copy(async_copy);
1561 status = nfserrno(-ENOMEM);
1562 if (!copy->cp_intra)
1563 nfsd4_interssc_disconnect(copy->ss_mnt);
1568 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1570 struct nfsd4_copy *copy;
1572 spin_lock(&clp->async_lock);
1573 list_for_each_entry(copy, &clp->async_copies, copies) {
1574 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
1576 refcount_inc(©->refcount);
1577 spin_unlock(&clp->async_lock);
1580 spin_unlock(&clp->async_lock);
1585 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1586 struct nfsd4_compound_state *cstate,
1587 union nfsd4_op_u *u)
1589 struct nfsd4_offload_status *os = &u->offload_status;
1590 struct nfsd4_copy *copy;
1591 struct nfs4_client *clp = cstate->clp;
1593 copy = find_async_copy(clp, &os->stateid);
1595 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1597 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1599 nfsd4_stop_copy(copy);
1605 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1606 union nfsd4_op_u *u)
1608 struct nfsd4_copy_notify *cn = &u->copy_notify;
1610 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1611 struct nfs4_stid *stid;
1612 struct nfs4_cpntf_state *cps;
1613 struct nfs4_client *clp = cstate->clp;
1615 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1616 &cn->cpn_src_stateid, RD_STATE, NULL,
1621 cn->cpn_sec = nn->nfsd4_lease;
1624 status = nfserrno(-ENOMEM);
1625 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1628 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1629 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1630 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1632 /* For now, only return one server address in cpn_src, the
1633 * address used by the client to connect to this server.
1635 cn->cpn_src.nl4_type = NL4_NETADDR;
1636 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1637 &cn->cpn_src.u.nl4_addr);
1638 WARN_ON_ONCE(status);
1640 nfs4_put_cpntf_state(nn, cps);
1644 nfs4_put_stid(stid);
1649 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1650 struct nfsd4_fallocate *fallocate, int flags)
1653 struct nfsd_file *nf;
1655 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1656 &fallocate->falloc_stateid,
1657 WR_STATE, &nf, NULL);
1658 if (status != nfs_ok) {
1659 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1663 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1664 fallocate->falloc_offset,
1665 fallocate->falloc_length,
1671 nfsd4_offload_status(struct svc_rqst *rqstp,
1672 struct nfsd4_compound_state *cstate,
1673 union nfsd4_op_u *u)
1675 struct nfsd4_offload_status *os = &u->offload_status;
1677 struct nfsd4_copy *copy;
1678 struct nfs4_client *clp = cstate->clp;
1680 copy = find_async_copy(clp, &os->stateid);
1682 os->count = copy->cp_res.wr_bytes_written;
1683 nfs4_put_copy(copy);
1685 status = nfserr_bad_stateid;
1691 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1692 union nfsd4_op_u *u)
1694 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1698 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1699 union nfsd4_op_u *u)
1701 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1702 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1706 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1707 union nfsd4_op_u *u)
1709 struct nfsd4_seek *seek = &u->seek;
1712 struct nfsd_file *nf;
1714 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1715 &seek->seek_stateid,
1716 RD_STATE, &nf, NULL);
1718 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1722 switch (seek->seek_whence) {
1723 case NFS4_CONTENT_DATA:
1726 case NFS4_CONTENT_HOLE:
1730 status = nfserr_union_notsupp;
1735 * Note: This call does change file->f_pos, but nothing in NFSD
1736 * should ever file->f_pos.
1738 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1739 if (seek->seek_pos < 0)
1740 status = nfserrno(seek->seek_pos);
1741 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1742 seek->seek_eof = true;
1749 /* This routine never returns NFS_OK! If there are no other errors, it
1750 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1751 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1752 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1755 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1756 struct nfsd4_verify *verify)
1762 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1766 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1770 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1771 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1772 return nfserr_inval;
1773 if (verify->ve_attrlen & 3)
1774 return nfserr_inval;
1777 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1779 count = 4 + (verify->ve_attrlen >> 2);
1780 buf = kmalloc(count << 2, GFP_KERNEL);
1782 return nfserr_jukebox;
1785 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1786 cstate->current_fh.fh_export,
1787 cstate->current_fh.fh_dentry,
1791 * If nfsd4_encode_fattr() ran out of space, assume that's because
1792 * the attributes are longer (hence different) than those given:
1794 if (status == nfserr_resource)
1795 status = nfserr_not_same;
1800 p = buf + 1 + ntohl(buf[0]);
1801 status = nfserr_not_same;
1802 if (ntohl(*p++) != verify->ve_attrlen)
1804 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1805 status = nfserr_same;
1813 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1814 union nfsd4_op_u *u)
1818 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1819 return status == nfserr_not_same ? nfs_ok : status;
1823 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1824 union nfsd4_op_u *u)
1828 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1829 return status == nfserr_same ? nfs_ok : status;
1832 #ifdef CONFIG_NFSD_PNFS
1833 static const struct nfsd4_layout_ops *
1834 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1836 if (!exp->ex_layout_types) {
1837 dprintk("%s: export does not support pNFS\n", __func__);
1841 if (layout_type >= LAYOUT_TYPE_MAX ||
1842 !(exp->ex_layout_types & (1 << layout_type))) {
1843 dprintk("%s: layout type %d not supported\n",
1844 __func__, layout_type);
1848 return nfsd4_layout_ops[layout_type];
1852 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1853 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1855 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1856 const struct nfsd4_layout_ops *ops;
1857 struct nfsd4_deviceid_map *map;
1858 struct svc_export *exp;
1861 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1863 gdp->gd_layout_type,
1864 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1867 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1869 dprintk("%s: couldn't find device ID to export mapping!\n",
1871 return nfserr_noent;
1874 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1876 dprintk("%s: could not find device id\n", __func__);
1877 return nfserr_noent;
1880 nfserr = nfserr_layoutunavailable;
1881 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1886 if (gdp->gd_maxcount != 0) {
1887 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1888 rqstp, cstate->session->se_client, gdp);
1891 gdp->gd_notify_types &= ops->notify_types;
1898 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1900 kfree(u->getdeviceinfo.gd_device);
1904 nfsd4_layoutget(struct svc_rqst *rqstp,
1905 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1907 struct nfsd4_layoutget *lgp = &u->layoutget;
1908 struct svc_fh *current_fh = &cstate->current_fh;
1909 const struct nfsd4_layout_ops *ops;
1910 struct nfs4_layout_stateid *ls;
1912 int accmode = NFSD_MAY_READ_IF_EXEC;
1914 switch (lgp->lg_seg.iomode) {
1916 accmode |= NFSD_MAY_READ;
1919 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1922 dprintk("%s: invalid iomode %d\n",
1923 __func__, lgp->lg_seg.iomode);
1924 nfserr = nfserr_badiomode;
1928 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1932 nfserr = nfserr_layoutunavailable;
1933 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1938 * Verify minlength and range as per RFC5661:
1939 * o If loga_length is less than loga_minlength,
1940 * the metadata server MUST return NFS4ERR_INVAL.
1941 * o If the sum of loga_offset and loga_minlength exceeds
1942 * NFS4_UINT64_MAX, and loga_minlength is not
1943 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1944 * o If the sum of loga_offset and loga_length exceeds
1945 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1946 * the error NFS4ERR_INVAL MUST result.
1948 nfserr = nfserr_inval;
1949 if (lgp->lg_seg.length < lgp->lg_minlength ||
1950 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1951 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1952 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1953 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1955 if (lgp->lg_seg.length == 0)
1958 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1959 true, lgp->lg_layout_type, &ls);
1961 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1965 nfserr = nfserr_recallconflict;
1966 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1969 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1974 nfserr = nfsd4_insert_layout(lgp, ls);
1977 mutex_unlock(&ls->ls_mutex);
1978 nfs4_put_stid(&ls->ls_stid);
1984 nfsd4_layoutget_release(union nfsd4_op_u *u)
1986 kfree(u->layoutget.lg_content);
1990 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1991 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1993 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1994 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1995 struct svc_fh *current_fh = &cstate->current_fh;
1996 const struct nfsd4_layout_ops *ops;
1997 loff_t new_size = lcp->lc_last_wr + 1;
1998 struct inode *inode;
1999 struct nfs4_layout_stateid *ls;
2002 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2006 nfserr = nfserr_layoutunavailable;
2007 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2010 inode = d_inode(current_fh->fh_dentry);
2012 nfserr = nfserr_inval;
2013 if (new_size <= seg->offset) {
2014 dprintk("pnfsd: last write before layout segment\n");
2017 if (new_size > seg->offset + seg->length) {
2018 dprintk("pnfsd: last write beyond layout segment\n");
2021 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2022 dprintk("pnfsd: layoutcommit beyond EOF\n");
2026 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2027 false, lcp->lc_layout_type,
2030 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2031 /* fixup error code as per RFC5661 */
2032 if (nfserr == nfserr_bad_stateid)
2033 nfserr = nfserr_badlayout;
2037 /* LAYOUTCOMMIT does not require any serialization */
2038 mutex_unlock(&ls->ls_mutex);
2040 if (new_size > i_size_read(inode)) {
2041 lcp->lc_size_chg = 1;
2042 lcp->lc_newsize = new_size;
2044 lcp->lc_size_chg = 0;
2047 nfserr = ops->proc_layoutcommit(inode, lcp);
2048 nfs4_put_stid(&ls->ls_stid);
2054 nfsd4_layoutreturn(struct svc_rqst *rqstp,
2055 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2057 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2058 struct svc_fh *current_fh = &cstate->current_fh;
2061 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2065 nfserr = nfserr_layoutunavailable;
2066 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2069 switch (lrp->lr_seg.iomode) {
2075 dprintk("%s: invalid iomode %d\n", __func__,
2076 lrp->lr_seg.iomode);
2077 nfserr = nfserr_inval;
2081 switch (lrp->lr_return_type) {
2083 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2087 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2090 dprintk("%s: invalid return_type %d\n", __func__,
2091 lrp->lr_return_type);
2092 nfserr = nfserr_inval;
2098 #endif /* CONFIG_NFSD_PNFS */
2101 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2102 union nfsd4_op_u *u)
2104 struct nfsd4_getxattr *getxattr = &u->getxattr;
2106 return nfsd_getxattr(rqstp, &cstate->current_fh,
2107 getxattr->getxa_name, &getxattr->getxa_buf,
2108 &getxattr->getxa_len);
2112 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2113 union nfsd4_op_u *u)
2115 struct nfsd4_setxattr *setxattr = &u->setxattr;
2118 if (opens_in_grace(SVC_NET(rqstp)))
2119 return nfserr_grace;
2121 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2122 setxattr->setxa_buf, setxattr->setxa_len,
2123 setxattr->setxa_flags);
2126 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2132 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2133 union nfsd4_op_u *u)
2136 * Get the entire list, then copy out only the user attributes
2137 * in the encode function.
2139 return nfsd_listxattr(rqstp, &cstate->current_fh,
2140 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2144 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2145 union nfsd4_op_u *u)
2147 struct nfsd4_removexattr *removexattr = &u->removexattr;
2150 if (opens_in_grace(SVC_NET(rqstp)))
2151 return nfserr_grace;
2153 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2154 removexattr->rmxa_name);
2157 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2166 nfsd4_proc_null(struct svc_rqst *rqstp)
2171 static inline void nfsd4_increment_op_stats(u32 opnum)
2173 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2174 nfsdstats.nfs4_opcount[opnum]++;
2177 static const struct nfsd4_operation nfsd4_ops[];
2179 static const char *nfsd4_op_name(unsigned opnum);
2182 * Enforce NFSv4.1 COMPOUND ordering rules:
2184 * Also note, enforced elsewhere:
2185 * - SEQUENCE other than as first op results in
2186 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2187 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2188 * (Enforced in nfsd4_bind_conn_to_session().)
2189 * - DESTROY_SESSION must be the final operation in a compound, if
2190 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2191 * (Enforced in nfsd4_destroy_session().)
2193 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2195 struct nfsd4_op *first_op = &args->ops[0];
2197 /* These ordering requirements don't apply to NFSv4.0: */
2198 if (args->minorversion == 0)
2200 /* This is weird, but OK, not our problem: */
2201 if (args->opcnt == 0)
2203 if (first_op->status == nfserr_op_illegal)
2205 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2206 return nfserr_op_not_in_session;
2207 if (first_op->opnum == OP_SEQUENCE)
2210 * So first_op is something allowed outside a session, like
2211 * EXCHANGE_ID; but then it has to be the only op in the
2214 if (args->opcnt != 1)
2215 return nfserr_not_only_op;
2219 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2221 return &nfsd4_ops[op->opnum];
2224 bool nfsd4_cache_this_op(struct nfsd4_op *op)
2226 if (op->opnum == OP_ILLEGAL)
2228 return OPDESC(op)->op_flags & OP_CACHEME;
2231 static bool need_wrongsec_check(struct svc_rqst *rqstp)
2233 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2234 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2235 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2236 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2237 const struct nfsd4_operation *thisd = OPDESC(this);
2238 const struct nfsd4_operation *nextd;
2241 * Most ops check wronsec on our own; only the putfh-like ops
2242 * have special rules.
2244 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2247 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2248 * put-filehandle operation if we're not going to use the
2251 if (argp->opcnt == resp->opcnt)
2253 if (next->opnum == OP_ILLEGAL)
2255 nextd = OPDESC(next);
2257 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2258 * errors themselves as necessary; others should check for them
2261 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2264 static void svcxdr_init_encode(struct svc_rqst *rqstp,
2265 struct nfsd4_compoundres *resp)
2267 struct xdr_stream *xdr = &resp->xdr;
2268 struct xdr_buf *buf = &rqstp->rq_res;
2269 struct kvec *head = buf->head;
2273 xdr->p = head->iov_base + head->iov_len;
2274 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
2275 /* Tail and page_len should be zero at this point: */
2276 buf->len = buf->head[0].iov_len;
2277 xdr->scratch.iov_len = 0;
2278 xdr->page_ptr = buf->pages - 1;
2279 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
2280 - rqstp->rq_auth_slack;
2283 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
2285 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2287 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2288 struct nfsd4_copy *copy;
2289 struct nfsd4_putfh *putfh;
2292 /* traverse all operation and if it's a COPY compound, mark the
2293 * source filehandle to skip verification
2295 for (i = 0; i < args->opcnt; i++) {
2297 if (op->opnum == OP_PUTFH)
2299 else if (op->opnum == OP_SAVEFH)
2300 saved_op = current_op;
2301 else if (op->opnum == OP_RESTOREFH)
2302 current_op = saved_op;
2303 else if (op->opnum == OP_COPY) {
2304 copy = (struct nfsd4_copy *)&op->u;
2306 op->status = nfserr_nofilehandle;
2309 putfh = (struct nfsd4_putfh *)&saved_op->u;
2310 if (!copy->cp_intra)
2311 putfh->no_verify = true;
2317 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2326 nfsd4_proc_compound(struct svc_rqst *rqstp)
2328 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2329 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2330 struct nfsd4_op *op;
2331 struct nfsd4_compound_state *cstate = &resp->cstate;
2332 struct svc_fh *current_fh = &cstate->current_fh;
2333 struct svc_fh *save_fh = &cstate->save_fh;
2334 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2337 svcxdr_init_encode(rqstp, resp);
2338 resp->tagp = resp->xdr.p;
2339 /* reserve space for: taglen, tag, and opcnt */
2340 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
2341 resp->taglen = args->taglen;
2342 resp->tag = args->tag;
2343 resp->rqstp = rqstp;
2344 cstate->minorversion = args->minorversion;
2345 fh_init(current_fh, NFS4_FHSIZE);
2346 fh_init(save_fh, NFS4_FHSIZE);
2348 * Don't use the deferral mechanism for NFSv4; compounds make it
2349 * too hard to avoid non-idempotency problems.
2351 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2354 * According to RFC3010, this takes precedence over all other errors.
2356 status = nfserr_minor_vers_mismatch;
2357 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2359 status = nfserr_resource;
2360 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2363 status = nfs41_check_op_ordering(args);
2366 op->status = status;
2370 check_if_stalefh_allowed(args);
2372 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2374 trace_nfsd_compound(rqstp, args->opcnt);
2375 while (!status && resp->opcnt < args->opcnt) {
2376 op = &args->ops[resp->opcnt++];
2379 * The XDR decode routines may have pre-set op->status;
2380 * for example, if there is a miscellaneous XDR error
2381 * it will be set to nfserr_bad_xdr.
2384 if (op->opnum == OP_OPEN)
2385 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2388 if (!current_fh->fh_dentry &&
2389 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2390 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2391 op->status = nfserr_nofilehandle;
2394 } else if (current_fh->fh_export &&
2395 current_fh->fh_export->ex_fslocs.migrated &&
2396 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2397 op->status = nfserr_moved;
2401 fh_clear_wcc(current_fh);
2403 /* If op is non-idempotent */
2404 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2406 * Don't execute this op if we couldn't encode a
2409 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2411 * Plus if there's another operation, make sure
2412 * we'll have space to at least encode an error:
2414 if (resp->opcnt < args->opcnt)
2415 plen += COMPOUND_ERR_SLACK_SPACE;
2416 op->status = nfsd4_check_resp_size(resp, plen);
2422 if (op->opdesc->op_get_currentstateid)
2423 op->opdesc->op_get_currentstateid(cstate, &op->u);
2424 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2426 /* Only from SEQUENCE */
2427 if (cstate->status == nfserr_replay_cache) {
2428 dprintk("%s NFS4.1 replay from cache\n", __func__);
2429 status = op->status;
2433 if (op->opdesc->op_set_currentstateid)
2434 op->opdesc->op_set_currentstateid(cstate, &op->u);
2436 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2437 clear_current_stateid(cstate);
2439 if (current_fh->fh_export &&
2440 need_wrongsec_check(rqstp))
2441 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2444 if (op->status == nfserr_replay_me) {
2445 op->replay = &cstate->replay_owner->so_replay;
2446 nfsd4_encode_replay(&resp->xdr, op);
2447 status = op->status = op->replay->rp_status;
2449 nfsd4_encode_operation(resp, op);
2450 status = op->status;
2453 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2454 nfsd4_op_name(op->opnum));
2456 nfsd4_cstate_clear_replay(cstate);
2457 nfsd4_increment_op_stats(op->opnum);
2460 cstate->status = status;
2463 BUG_ON(cstate->replay_owner);
2465 /* Reset deferral mechanism for RPC deferrals */
2466 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2467 dprintk("nfsv4 compound returned %d\n", ntohl(status));
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_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2596 u32 maxcount = 0, rlen = 0;
2598 maxcount = svc_max_payload(rqstp);
2599 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2601 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2602 XDR_QUADLEN(rlen)) * sizeof(__be32);
2605 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2607 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2610 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2612 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2616 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2618 return (op_encode_hdr_size + op_encode_change_info_maxsz
2619 + op_encode_change_info_maxsz) * sizeof(__be32);
2622 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2623 struct nfsd4_op *op)
2625 return (op_encode_hdr_size
2626 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2629 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2631 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2635 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2637 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2640 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2642 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2643 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2646 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2648 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2652 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2654 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2657 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2659 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2660 1 + 1 + /* eir_flags, spr_how */\
2661 4 + /* spo_must_enforce & _allow with bitmap */\
2662 2 + /*eir_server_owner.so_minor_id */\
2663 /* eir_server_owner.so_major_id<> */\
2664 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2665 /* eir_server_scope<> */\
2666 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2667 1 + /* eir_server_impl_id array length */\
2668 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2671 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2673 return (op_encode_hdr_size + \
2674 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2675 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2678 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2680 return (op_encode_hdr_size + \
2681 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2682 2 + /* csr_sequence, csr_flags */\
2683 op_encode_channel_attrs_maxsz + \
2684 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2687 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2689 return (op_encode_hdr_size +
2690 1 /* wr_callback */ +
2691 op_encode_stateid_maxsz /* wr_callback */ +
2693 1 /* wr_committed */ +
2694 op_encode_verifier_maxsz +
2695 1 /* cr_consecutive */ +
2696 1 /* cr_synchronous */) * sizeof(__be32);
2699 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2700 struct nfsd4_op *op)
2702 return (op_encode_hdr_size +
2704 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2707 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2708 struct nfsd4_op *op)
2710 return (op_encode_hdr_size +
2711 3 /* cnr_lease_time */ +
2712 1 /* We support one cnr_source_server */ +
2713 1 /* cnr_stateid seq */ +
2714 op_encode_stateid_maxsz /* cnr_stateid */ +
2715 1 /* num cnr_source_server*/ +
2718 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2722 #ifdef CONFIG_NFSD_PNFS
2723 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2725 u32 maxcount = 0, rlen = 0;
2727 maxcount = svc_max_payload(rqstp);
2728 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2730 return (op_encode_hdr_size +
2731 1 /* gd_layout_type*/ +
2733 2 /* gd_notify_types */) * sizeof(__be32);
2737 * At this stage we don't really know what layout driver will handle the request,
2738 * so we need to define an arbitrary upper bound here.
2740 #define MAX_LAYOUT_SIZE 128
2741 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2743 return (op_encode_hdr_size +
2744 1 /* logr_return_on_close */ +
2745 op_encode_stateid_maxsz +
2746 1 /* nr of layouts */ +
2747 MAX_LAYOUT_SIZE) * sizeof(__be32);
2750 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2752 return (op_encode_hdr_size +
2753 1 /* locr_newsize */ +
2754 2 /* ns_size */) * sizeof(__be32);
2757 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2759 return (op_encode_hdr_size +
2760 1 /* lrs_stateid */ +
2761 op_encode_stateid_maxsz) * sizeof(__be32);
2763 #endif /* CONFIG_NFSD_PNFS */
2766 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2768 return (op_encode_hdr_size + 3) * sizeof(__be32);
2771 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2772 struct nfsd4_op *op)
2776 maxcount = svc_max_payload(rqstp);
2777 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2779 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2782 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2783 struct nfsd4_op *op)
2785 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2788 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2789 struct nfsd4_op *op)
2793 maxcount = svc_max_payload(rqstp);
2794 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2796 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2799 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2800 struct nfsd4_op *op)
2802 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2807 static const struct nfsd4_operation nfsd4_ops[] = {
2809 .op_func = nfsd4_access,
2810 .op_name = "OP_ACCESS",
2811 .op_rsize_bop = nfsd4_access_rsize,
2814 .op_func = nfsd4_close,
2815 .op_flags = OP_MODIFIES_SOMETHING,
2816 .op_name = "OP_CLOSE",
2817 .op_rsize_bop = nfsd4_status_stateid_rsize,
2818 .op_get_currentstateid = nfsd4_get_closestateid,
2819 .op_set_currentstateid = nfsd4_set_closestateid,
2822 .op_func = nfsd4_commit,
2823 .op_flags = OP_MODIFIES_SOMETHING,
2824 .op_name = "OP_COMMIT",
2825 .op_rsize_bop = nfsd4_commit_rsize,
2828 .op_func = nfsd4_create,
2829 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2830 .op_name = "OP_CREATE",
2831 .op_rsize_bop = nfsd4_create_rsize,
2833 [OP_DELEGRETURN] = {
2834 .op_func = nfsd4_delegreturn,
2835 .op_flags = OP_MODIFIES_SOMETHING,
2836 .op_name = "OP_DELEGRETURN",
2837 .op_rsize_bop = nfsd4_only_status_rsize,
2838 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2841 .op_func = nfsd4_getattr,
2842 .op_flags = ALLOWED_ON_ABSENT_FS,
2843 .op_rsize_bop = nfsd4_getattr_rsize,
2844 .op_name = "OP_GETATTR",
2847 .op_func = nfsd4_getfh,
2848 .op_name = "OP_GETFH",
2849 .op_rsize_bop = nfsd4_getfh_rsize,
2852 .op_func = nfsd4_link,
2853 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2855 .op_name = "OP_LINK",
2856 .op_rsize_bop = nfsd4_link_rsize,
2859 .op_func = nfsd4_lock,
2860 .op_flags = OP_MODIFIES_SOMETHING |
2861 OP_NONTRIVIAL_ERROR_ENCODE,
2862 .op_name = "OP_LOCK",
2863 .op_rsize_bop = nfsd4_lock_rsize,
2864 .op_set_currentstateid = nfsd4_set_lockstateid,
2867 .op_func = nfsd4_lockt,
2868 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2869 .op_name = "OP_LOCKT",
2870 .op_rsize_bop = nfsd4_lock_rsize,
2873 .op_func = nfsd4_locku,
2874 .op_flags = OP_MODIFIES_SOMETHING,
2875 .op_name = "OP_LOCKU",
2876 .op_rsize_bop = nfsd4_status_stateid_rsize,
2877 .op_get_currentstateid = nfsd4_get_lockustateid,
2880 .op_func = nfsd4_lookup,
2881 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2882 .op_name = "OP_LOOKUP",
2883 .op_rsize_bop = nfsd4_only_status_rsize,
2886 .op_func = nfsd4_lookupp,
2887 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2888 .op_name = "OP_LOOKUPP",
2889 .op_rsize_bop = nfsd4_only_status_rsize,
2892 .op_func = nfsd4_nverify,
2893 .op_name = "OP_NVERIFY",
2894 .op_rsize_bop = nfsd4_only_status_rsize,
2897 .op_func = nfsd4_open,
2898 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2899 .op_name = "OP_OPEN",
2900 .op_rsize_bop = nfsd4_open_rsize,
2901 .op_set_currentstateid = nfsd4_set_openstateid,
2903 [OP_OPEN_CONFIRM] = {
2904 .op_func = nfsd4_open_confirm,
2905 .op_flags = OP_MODIFIES_SOMETHING,
2906 .op_name = "OP_OPEN_CONFIRM",
2907 .op_rsize_bop = nfsd4_status_stateid_rsize,
2909 [OP_OPEN_DOWNGRADE] = {
2910 .op_func = nfsd4_open_downgrade,
2911 .op_flags = OP_MODIFIES_SOMETHING,
2912 .op_name = "OP_OPEN_DOWNGRADE",
2913 .op_rsize_bop = nfsd4_status_stateid_rsize,
2914 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2915 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2918 .op_func = nfsd4_putfh,
2919 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2920 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2921 .op_name = "OP_PUTFH",
2922 .op_rsize_bop = nfsd4_only_status_rsize,
2925 .op_func = nfsd4_putrootfh,
2926 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2927 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2928 .op_name = "OP_PUTPUBFH",
2929 .op_rsize_bop = nfsd4_only_status_rsize,
2932 .op_func = nfsd4_putrootfh,
2933 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2934 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2935 .op_name = "OP_PUTROOTFH",
2936 .op_rsize_bop = nfsd4_only_status_rsize,
2939 .op_func = nfsd4_read,
2940 .op_release = nfsd4_read_release,
2941 .op_name = "OP_READ",
2942 .op_rsize_bop = nfsd4_read_rsize,
2943 .op_get_currentstateid = nfsd4_get_readstateid,
2946 .op_func = nfsd4_readdir,
2947 .op_name = "OP_READDIR",
2948 .op_rsize_bop = nfsd4_readdir_rsize,
2951 .op_func = nfsd4_readlink,
2952 .op_name = "OP_READLINK",
2953 .op_rsize_bop = nfsd4_readlink_rsize,
2956 .op_func = nfsd4_remove,
2957 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2958 .op_name = "OP_REMOVE",
2959 .op_rsize_bop = nfsd4_remove_rsize,
2962 .op_func = nfsd4_rename,
2963 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2964 .op_name = "OP_RENAME",
2965 .op_rsize_bop = nfsd4_rename_rsize,
2968 .op_func = nfsd4_renew,
2969 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2970 | OP_MODIFIES_SOMETHING,
2971 .op_name = "OP_RENEW",
2972 .op_rsize_bop = nfsd4_only_status_rsize,
2976 .op_func = nfsd4_restorefh,
2977 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2978 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2979 .op_name = "OP_RESTOREFH",
2980 .op_rsize_bop = nfsd4_only_status_rsize,
2983 .op_func = nfsd4_savefh,
2984 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2985 .op_name = "OP_SAVEFH",
2986 .op_rsize_bop = nfsd4_only_status_rsize,
2989 .op_func = nfsd4_secinfo,
2990 .op_release = nfsd4_secinfo_release,
2991 .op_flags = OP_HANDLES_WRONGSEC,
2992 .op_name = "OP_SECINFO",
2993 .op_rsize_bop = nfsd4_secinfo_rsize,
2996 .op_func = nfsd4_setattr,
2997 .op_name = "OP_SETATTR",
2998 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2999 | OP_NONTRIVIAL_ERROR_ENCODE,
3000 .op_rsize_bop = nfsd4_setattr_rsize,
3001 .op_get_currentstateid = nfsd4_get_setattrstateid,
3003 [OP_SETCLIENTID] = {
3004 .op_func = nfsd4_setclientid,
3005 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3006 | OP_MODIFIES_SOMETHING | OP_CACHEME
3007 | OP_NONTRIVIAL_ERROR_ENCODE,
3008 .op_name = "OP_SETCLIENTID",
3009 .op_rsize_bop = nfsd4_setclientid_rsize,
3011 [OP_SETCLIENTID_CONFIRM] = {
3012 .op_func = nfsd4_setclientid_confirm,
3013 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3014 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3015 .op_name = "OP_SETCLIENTID_CONFIRM",
3016 .op_rsize_bop = nfsd4_only_status_rsize,
3019 .op_func = nfsd4_verify,
3020 .op_name = "OP_VERIFY",
3021 .op_rsize_bop = nfsd4_only_status_rsize,
3024 .op_func = nfsd4_write,
3025 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3026 .op_name = "OP_WRITE",
3027 .op_rsize_bop = nfsd4_write_rsize,
3028 .op_get_currentstateid = nfsd4_get_writestateid,
3030 [OP_RELEASE_LOCKOWNER] = {
3031 .op_func = nfsd4_release_lockowner,
3032 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3033 | OP_MODIFIES_SOMETHING,
3034 .op_name = "OP_RELEASE_LOCKOWNER",
3035 .op_rsize_bop = nfsd4_only_status_rsize,
3038 /* NFSv4.1 operations */
3039 [OP_EXCHANGE_ID] = {
3040 .op_func = nfsd4_exchange_id,
3041 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3042 | OP_MODIFIES_SOMETHING,
3043 .op_name = "OP_EXCHANGE_ID",
3044 .op_rsize_bop = nfsd4_exchange_id_rsize,
3046 [OP_BACKCHANNEL_CTL] = {
3047 .op_func = nfsd4_backchannel_ctl,
3048 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3049 .op_name = "OP_BACKCHANNEL_CTL",
3050 .op_rsize_bop = nfsd4_only_status_rsize,
3052 [OP_BIND_CONN_TO_SESSION] = {
3053 .op_func = nfsd4_bind_conn_to_session,
3054 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3055 | OP_MODIFIES_SOMETHING,
3056 .op_name = "OP_BIND_CONN_TO_SESSION",
3057 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3059 [OP_CREATE_SESSION] = {
3060 .op_func = nfsd4_create_session,
3061 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3062 | OP_MODIFIES_SOMETHING,
3063 .op_name = "OP_CREATE_SESSION",
3064 .op_rsize_bop = nfsd4_create_session_rsize,
3066 [OP_DESTROY_SESSION] = {
3067 .op_func = nfsd4_destroy_session,
3068 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3069 | OP_MODIFIES_SOMETHING,
3070 .op_name = "OP_DESTROY_SESSION",
3071 .op_rsize_bop = nfsd4_only_status_rsize,
3074 .op_func = nfsd4_sequence,
3075 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3076 .op_name = "OP_SEQUENCE",
3077 .op_rsize_bop = nfsd4_sequence_rsize,
3079 [OP_DESTROY_CLIENTID] = {
3080 .op_func = nfsd4_destroy_clientid,
3081 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3082 | OP_MODIFIES_SOMETHING,
3083 .op_name = "OP_DESTROY_CLIENTID",
3084 .op_rsize_bop = nfsd4_only_status_rsize,
3086 [OP_RECLAIM_COMPLETE] = {
3087 .op_func = nfsd4_reclaim_complete,
3088 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3089 .op_name = "OP_RECLAIM_COMPLETE",
3090 .op_rsize_bop = nfsd4_only_status_rsize,
3092 [OP_SECINFO_NO_NAME] = {
3093 .op_func = nfsd4_secinfo_no_name,
3094 .op_release = nfsd4_secinfo_no_name_release,
3095 .op_flags = OP_HANDLES_WRONGSEC,
3096 .op_name = "OP_SECINFO_NO_NAME",
3097 .op_rsize_bop = nfsd4_secinfo_rsize,
3099 [OP_TEST_STATEID] = {
3100 .op_func = nfsd4_test_stateid,
3101 .op_flags = ALLOWED_WITHOUT_FH,
3102 .op_name = "OP_TEST_STATEID",
3103 .op_rsize_bop = nfsd4_test_stateid_rsize,
3105 [OP_FREE_STATEID] = {
3106 .op_func = nfsd4_free_stateid,
3107 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3108 .op_name = "OP_FREE_STATEID",
3109 .op_get_currentstateid = nfsd4_get_freestateid,
3110 .op_rsize_bop = nfsd4_only_status_rsize,
3112 #ifdef CONFIG_NFSD_PNFS
3113 [OP_GETDEVICEINFO] = {
3114 .op_func = nfsd4_getdeviceinfo,
3115 .op_release = nfsd4_getdeviceinfo_release,
3116 .op_flags = ALLOWED_WITHOUT_FH,
3117 .op_name = "OP_GETDEVICEINFO",
3118 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3121 .op_func = nfsd4_layoutget,
3122 .op_release = nfsd4_layoutget_release,
3123 .op_flags = OP_MODIFIES_SOMETHING,
3124 .op_name = "OP_LAYOUTGET",
3125 .op_rsize_bop = nfsd4_layoutget_rsize,
3127 [OP_LAYOUTCOMMIT] = {
3128 .op_func = nfsd4_layoutcommit,
3129 .op_flags = OP_MODIFIES_SOMETHING,
3130 .op_name = "OP_LAYOUTCOMMIT",
3131 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3133 [OP_LAYOUTRETURN] = {
3134 .op_func = nfsd4_layoutreturn,
3135 .op_flags = OP_MODIFIES_SOMETHING,
3136 .op_name = "OP_LAYOUTRETURN",
3137 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3139 #endif /* CONFIG_NFSD_PNFS */
3141 /* NFSv4.2 operations */
3143 .op_func = nfsd4_allocate,
3144 .op_flags = OP_MODIFIES_SOMETHING,
3145 .op_name = "OP_ALLOCATE",
3146 .op_rsize_bop = nfsd4_only_status_rsize,
3149 .op_func = nfsd4_deallocate,
3150 .op_flags = OP_MODIFIES_SOMETHING,
3151 .op_name = "OP_DEALLOCATE",
3152 .op_rsize_bop = nfsd4_only_status_rsize,
3155 .op_func = nfsd4_clone,
3156 .op_flags = OP_MODIFIES_SOMETHING,
3157 .op_name = "OP_CLONE",
3158 .op_rsize_bop = nfsd4_only_status_rsize,
3161 .op_func = nfsd4_copy,
3162 .op_flags = OP_MODIFIES_SOMETHING,
3163 .op_name = "OP_COPY",
3164 .op_rsize_bop = nfsd4_copy_rsize,
3167 .op_func = nfsd4_seek,
3168 .op_name = "OP_SEEK",
3169 .op_rsize_bop = nfsd4_seek_rsize,
3171 [OP_OFFLOAD_STATUS] = {
3172 .op_func = nfsd4_offload_status,
3173 .op_name = "OP_OFFLOAD_STATUS",
3174 .op_rsize_bop = nfsd4_offload_status_rsize,
3176 [OP_OFFLOAD_CANCEL] = {
3177 .op_func = nfsd4_offload_cancel,
3178 .op_flags = OP_MODIFIES_SOMETHING,
3179 .op_name = "OP_OFFLOAD_CANCEL",
3180 .op_rsize_bop = nfsd4_only_status_rsize,
3182 [OP_COPY_NOTIFY] = {
3183 .op_func = nfsd4_copy_notify,
3184 .op_flags = OP_MODIFIES_SOMETHING,
3185 .op_name = "OP_COPY_NOTIFY",
3186 .op_rsize_bop = nfsd4_copy_notify_rsize,
3189 .op_func = nfsd4_getxattr,
3190 .op_name = "OP_GETXATTR",
3191 .op_rsize_bop = nfsd4_getxattr_rsize,
3194 .op_func = nfsd4_setxattr,
3195 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3196 .op_name = "OP_SETXATTR",
3197 .op_rsize_bop = nfsd4_setxattr_rsize,
3200 .op_func = nfsd4_listxattrs,
3201 .op_name = "OP_LISTXATTRS",
3202 .op_rsize_bop = nfsd4_listxattrs_rsize,
3204 [OP_REMOVEXATTR] = {
3205 .op_func = nfsd4_removexattr,
3206 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3207 .op_name = "OP_REMOVEXATTR",
3208 .op_rsize_bop = nfsd4_removexattr_rsize,
3213 * nfsd4_spo_must_allow - Determine if the compound op contains an
3214 * operation that is allowed to be sent with machine credentials
3216 * @rqstp: a pointer to the struct svc_rqst
3218 * Checks to see if the compound contains a spo_must_allow op
3219 * and confirms that it was sent with the proper machine creds.
3222 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3224 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3225 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3226 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3227 struct nfsd4_compound_state *cstate = &resp->cstate;
3228 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3231 if (!cstate->minorversion)
3234 if (cstate->spo_must_allowed == true)
3237 opiter = resp->opcnt;
3238 while (opiter < argp->opcnt) {
3239 this = &argp->ops[opiter++];
3240 if (test_bit(this->opnum, allow->u.longs) &&
3241 cstate->clp->cl_mach_cred &&
3242 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3243 cstate->spo_must_allowed = true;
3247 cstate->spo_must_allowed = false;
3251 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3253 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3254 return op_encode_hdr_size * sizeof(__be32);
3256 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3257 return OPDESC(op)->op_rsize_bop(rqstp, op);
3260 void warn_on_nonidempotent_op(struct nfsd4_op *op)
3262 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3263 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
3264 op->opnum, nfsd4_op_name(op->opnum));
3269 static const char *nfsd4_op_name(unsigned opnum)
3271 if (opnum < ARRAY_SIZE(nfsd4_ops))
3272 return nfsd4_ops[opnum].op_name;
3273 return "unknown_operation";
3276 #define nfsd4_voidres nfsd4_voidargs
3277 struct nfsd4_voidargs { int dummy; };
3279 static const struct svc_procedure nfsd_procedures4[2] = {
3281 .pc_func = nfsd4_proc_null,
3282 .pc_encode = nfs4svc_encode_voidres,
3283 .pc_argsize = sizeof(struct nfsd4_voidargs),
3284 .pc_ressize = sizeof(struct nfsd4_voidres),
3285 .pc_cachetype = RC_NOCACHE,
3288 [NFSPROC4_COMPOUND] = {
3289 .pc_func = nfsd4_proc_compound,
3290 .pc_decode = nfs4svc_decode_compoundargs,
3291 .pc_encode = nfs4svc_encode_compoundres,
3292 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3293 .pc_ressize = sizeof(struct nfsd4_compoundres),
3294 .pc_release = nfsd4_release_compoundargs,
3295 .pc_cachetype = RC_NOCACHE,
3296 .pc_xdrressize = NFSD_BUFSIZE/4,
3300 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3301 const struct svc_version nfsd_version4 = {
3304 .vs_proc = nfsd_procedures4,
3305 .vs_count = nfsd_count3,
3306 .vs_dispatch = nfsd_dispatch,
3307 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3308 .vs_rpcb_optnl = true,
3309 .vs_need_cong_ctrl = true,