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 static bool inter_copy_offload_enable;
54 module_param(inter_copy_offload_enable, bool, 0644);
55 MODULE_PARM_DESC(inter_copy_offload_enable,
56 "Enable inter server to server copy offload. Default: false");
58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59 #include <linux/security.h>
62 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
64 struct inode *inode = d_inode(resfh->fh_dentry);
68 status = security_inode_setsecctx(resfh->fh_dentry,
69 label->data, label->len);
74 * XXX: We should really fail the whole open, but we may
75 * already have created a new file, so it may be too
76 * late. For now this seems the least of evils:
78 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
84 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
88 #define NFSDDBG_FACILITY NFSDDBG_PROC
90 static u32 nfsd_attrmask[] = {
91 NFSD_WRITEABLE_ATTRS_WORD0,
92 NFSD_WRITEABLE_ATTRS_WORD1,
93 NFSD_WRITEABLE_ATTRS_WORD2
96 static u32 nfsd41_ex_attrmask[] = {
97 NFSD_SUPPATTR_EXCLCREAT_WORD0,
98 NFSD_SUPPATTR_EXCLCREAT_WORD1,
99 NFSD_SUPPATTR_EXCLCREAT_WORD2
103 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
104 u32 *bmval, u32 *writable)
106 struct dentry *dentry = cstate->current_fh.fh_dentry;
107 struct svc_export *exp = cstate->current_fh.fh_export;
109 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
110 return nfserr_attrnotsupp;
111 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
112 return nfserr_attrnotsupp;
113 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
114 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
115 return nfserr_attrnotsupp;
116 if (writable && !bmval_is_subset(bmval, writable))
118 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
119 (bmval[1] & FATTR4_WORD1_MODE))
125 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
126 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
128 __be32 status = nfs_ok;
130 if (open->op_create == NFS4_OPEN_CREATE) {
131 if (open->op_createmode == NFS4_CREATE_UNCHECKED
132 || open->op_createmode == NFS4_CREATE_GUARDED)
133 status = check_attr_support(rqstp, cstate,
134 open->op_bmval, nfsd_attrmask);
135 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
136 status = check_attr_support(rqstp, cstate,
137 open->op_bmval, nfsd41_ex_attrmask);
144 is_create_with_attrs(struct nfsd4_open *open)
146 return open->op_create == NFS4_OPEN_CREATE
147 && (open->op_createmode == NFS4_CREATE_UNCHECKED
148 || open->op_createmode == NFS4_CREATE_GUARDED
149 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
153 * if error occurs when setting the acl, just clear the acl bit
154 * in the returned attr bitmap.
157 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
158 struct nfs4_acl *acl, u32 *bmval)
162 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
165 * We should probably fail the whole open at this point,
166 * but we've already created the file, so it's too late;
167 * So this seems the least of evils:
169 bmval[0] &= ~FATTR4_WORD0_ACL;
173 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
176 dget(src->fh_dentry);
178 exp_get(src->fh_export);
183 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
187 if (open->op_truncate &&
188 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
191 accmode |= NFSD_MAY_READ_IF_EXEC;
193 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
194 accmode |= NFSD_MAY_READ;
195 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
196 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
197 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
198 accmode |= NFSD_MAY_WRITE;
200 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
205 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
207 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
214 * Using err_symlink as our catch-all case may look odd; but
215 * there's no other obvious error for this case in 4.0, and we
216 * happen to know that it will cause the linux v4 client to do
217 * the right thing on attempts to open something other than a
220 return nfserr_symlink;
223 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
225 if (nfsd4_has_session(cstate))
227 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
232 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
234 struct svc_fh *current_fh = &cstate->current_fh;
238 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
240 return nfserr_jukebox;
241 fh_init(*resfh, NFS4_FHSIZE);
242 open->op_truncate = false;
244 if (open->op_create) {
245 /* FIXME: check session persistence and pnfs flags.
246 * The nfsv4.1 spec requires the following semantics:
248 * Persistent | pNFS | Server REQUIRED | Client Allowed
249 * Reply Cache | server | |
250 * -------------+--------+-----------------+--------------------
251 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
253 * | | and EXCLUSIVE4 | or EXCLUSIVE4
255 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
256 * yes | no | GUARDED4 | GUARDED4
257 * yes | yes | GUARDED4 | GUARDED4
261 * Note: create modes (UNCHECKED,GUARDED...) are the same
262 * in NFSv4 as in v3 except EXCLUSIVE4_1.
264 current->fs->umask = open->op_umask;
265 status = do_nfsd_create(rqstp, current_fh, open->op_fname,
266 open->op_fnamelen, &open->op_iattr,
267 *resfh, open->op_createmode,
268 (u32 *)open->op_verf.data,
269 &open->op_truncate, &open->op_created);
270 current->fs->umask = 0;
272 if (!status && open->op_label.len)
273 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
276 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
277 * use the returned bitmask to indicate which attributes
278 * we used to store the verifier:
280 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
281 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
282 FATTR4_WORD1_TIME_MODIFY);
285 * Note this may exit with the parent still locked.
286 * We will hold the lock until nfsd4_open's final
287 * lookup, to prevent renames or unlinks until we've had
288 * a chance to an acquire a delegation if appropriate.
290 status = nfsd_lookup(rqstp, current_fh,
291 open->op_fname, open->op_fnamelen, *resfh);
294 status = nfsd_check_obj_isreg(*resfh);
298 if (is_create_with_attrs(open) && open->op_acl != NULL)
299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
302 accmode = NFSD_MAY_NOP;
303 if (open->op_created ||
304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
305 accmode |= NFSD_MAY_OWNER_OVERRIDE;
306 status = do_open_permission(rqstp, *resfh, open, accmode);
307 set_change_info(&open->op_cinfo, current_fh);
313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
315 struct svc_fh *current_fh = &cstate->current_fh;
319 /* We don't know the target directory, and therefore can not
320 * set the change info
323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
328 (open->op_iattr.ia_size == 0);
330 * In the delegation case, the client is telling us about an
331 * open that it *already* performed locally, some time ago. We
332 * should let it succeed now if possible.
334 * In the case of a CLAIM_FH open, on the other hand, the client
335 * may be counting on us to enforce permissions (the Linux 4.1
336 * client uses this for normal opens, for example).
338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
339 accmode = NFSD_MAY_OWNER_OVERRIDE;
341 status = do_open_permission(rqstp, current_fh, open, accmode);
347 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
349 struct nfsd4_sessionid *sid =
350 (struct nfsd4_sessionid *)session->se_sessionid.data;
352 clid->cl_boot = sid->clientid.cl_boot;
353 clid->cl_id = sid->clientid.cl_id;
357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
360 struct nfsd4_open *open = &u->open;
362 struct svc_fh *resfh = NULL;
363 struct net *net = SVC_NET(rqstp);
364 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
365 bool reclaim = false;
367 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
368 (int)open->op_fnamelen, open->op_fname,
371 /* This check required by spec. */
372 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
375 open->op_created = false;
378 * Before RECLAIM_COMPLETE done, server should deny new lock
380 if (nfsd4_has_session(cstate) &&
381 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
382 &cstate->session->se_client->cl_flags) &&
383 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
386 if (nfsd4_has_session(cstate))
387 copy_clientid(&open->op_clientid, cstate->session);
389 /* check seqid for replay. set nfs4_owner */
390 status = nfsd4_process_open1(cstate, open, nn);
391 if (status == nfserr_replay_me) {
392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
393 fh_put(&cstate->current_fh);
394 fh_copy_shallow(&cstate->current_fh.fh_handle,
396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
398 dprintk("nfsd4_open: replay failed"
399 " restoring previous filehandle\n");
401 status = nfserr_replay_me;
405 if (open->op_xdr_error) {
406 status = open->op_xdr_error;
410 status = nfsd4_check_open_attributes(rqstp, cstate, open);
414 /* Openowner is now set, so sequence id will get bumped. Now we need
415 * these checks before we do any creates: */
416 status = nfserr_grace;
417 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
419 status = nfserr_no_grace;
420 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
423 switch (open->op_claim_type) {
424 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
425 case NFS4_OPEN_CLAIM_NULL:
426 status = do_open_lookup(rqstp, cstate, open, &resfh);
430 case NFS4_OPEN_CLAIM_PREVIOUS:
431 status = nfs4_check_open_reclaim(&open->op_clientid,
435 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
438 case NFS4_OPEN_CLAIM_FH:
439 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
440 status = do_open_fhandle(rqstp, cstate, open);
443 resfh = &cstate->current_fh;
445 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
446 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
447 dprintk("NFSD: unsupported OPEN claim type %d\n",
448 open->op_claim_type);
449 status = nfserr_notsupp;
452 dprintk("NFSD: Invalid OPEN claim type %d\n",
453 open->op_claim_type);
454 status = nfserr_inval;
458 * nfsd4_process_open2() does the actual opening of the file. If
459 * successful, it (1) truncates the file if open->op_truncate was
460 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
462 status = nfsd4_process_open2(rqstp, resfh, open);
463 WARN(status && open->op_created,
464 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
465 be32_to_cpu(status));
466 if (reclaim && !status)
467 nn->somebody_reclaimed = true;
469 if (resfh && resfh != &cstate->current_fh) {
470 fh_dup2(&cstate->current_fh, resfh);
474 nfsd4_cleanup_open_state(cstate, open);
475 nfsd4_bump_seqid(cstate, status);
480 * OPEN is the only seqid-mutating operation whose decoding can fail
481 * with a seqid-mutating error (specifically, decoding of user names in
482 * the attributes). Therefore we have to do some processing to look up
483 * the stateowner so that we can bump the seqid.
485 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
487 struct nfsd4_open *open = &op->u.open;
489 if (!seqid_mutating_err(ntohl(op->status)))
491 if (nfsd4_has_session(cstate))
493 open->op_xdr_error = op->status;
494 return nfsd4_open(rqstp, cstate, &op->u);
498 * filehandle-manipulating ops.
501 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
504 u->getfh = &cstate->current_fh;
509 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
512 struct nfsd4_putfh *putfh = &u->putfh;
515 fh_put(&cstate->current_fh);
516 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
517 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
519 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
520 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
521 if (ret == nfserr_stale && putfh->no_verify) {
522 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
530 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
535 fh_put(&cstate->current_fh);
536 status = exp_pseudoroot(rqstp, &cstate->current_fh);
541 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
544 if (!cstate->save_fh.fh_dentry)
545 return nfserr_restorefh;
547 fh_dup2(&cstate->current_fh, &cstate->save_fh);
548 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
549 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
550 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
556 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
559 fh_dup2(&cstate->save_fh, &cstate->current_fh);
560 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
561 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
562 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
571 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
574 struct nfsd4_access *access = &u->access;
577 access_full = NFS3_ACCESS_FULL;
578 if (cstate->minorversion >= 2)
579 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
582 if (access->ac_req_access & ~access_full)
585 access->ac_resp_access = access->ac_req_access;
586 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
587 &access->ac_supported);
590 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
592 __be32 *verf = (__be32 *)verifier->data;
594 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
596 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
600 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
603 struct nfsd4_commit *commit = &u->commit;
605 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
607 (__be32 *)commit->co_verf.data);
611 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
614 struct nfsd4_create *create = &u->create;
619 fh_init(&resfh, NFS4_FHSIZE);
621 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
625 status = check_attr_support(rqstp, cstate, create->cr_bmval,
630 current->fs->umask = create->cr_umask;
631 switch (create->cr_type) {
633 status = nfsd_symlink(rqstp, &cstate->current_fh,
634 create->cr_name, create->cr_namelen,
635 create->cr_data, &resfh);
639 status = nfserr_inval;
640 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
641 if (MAJOR(rdev) != create->cr_specdata1 ||
642 MINOR(rdev) != create->cr_specdata2)
644 status = nfsd_create(rqstp, &cstate->current_fh,
645 create->cr_name, create->cr_namelen,
646 &create->cr_iattr, S_IFBLK, rdev, &resfh);
650 status = nfserr_inval;
651 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
652 if (MAJOR(rdev) != create->cr_specdata1 ||
653 MINOR(rdev) != create->cr_specdata2)
655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr,S_IFCHR, rdev, &resfh);
661 status = nfsd_create(rqstp, &cstate->current_fh,
662 create->cr_name, create->cr_namelen,
663 &create->cr_iattr, S_IFSOCK, 0, &resfh);
667 status = nfsd_create(rqstp, &cstate->current_fh,
668 create->cr_name, create->cr_namelen,
669 &create->cr_iattr, S_IFIFO, 0, &resfh);
673 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
674 status = nfsd_create(rqstp, &cstate->current_fh,
675 create->cr_name, create->cr_namelen,
676 &create->cr_iattr, S_IFDIR, 0, &resfh);
680 status = nfserr_badtype;
686 if (create->cr_label.len)
687 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
689 if (create->cr_acl != NULL)
690 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
693 fh_unlock(&cstate->current_fh);
694 set_change_info(&create->cr_cinfo, &cstate->current_fh);
695 fh_dup2(&cstate->current_fh, &resfh);
699 current->fs->umask = 0;
704 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
707 struct nfsd4_getattr *getattr = &u->getattr;
710 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
714 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
717 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
718 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
719 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
721 getattr->ga_fhp = &cstate->current_fh;
726 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
729 struct nfsd4_link *link = &u->link;
732 status = nfsd_link(rqstp, &cstate->current_fh,
733 link->li_name, link->li_namelen, &cstate->save_fh);
735 set_change_info(&link->li_cinfo, &cstate->current_fh);
739 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
741 struct svc_fh tmp_fh;
744 fh_init(&tmp_fh, NFS4_FHSIZE);
745 ret = exp_pseudoroot(rqstp, &tmp_fh);
748 if (tmp_fh.fh_dentry == fh->fh_dentry) {
753 return nfsd_lookup(rqstp, fh, "..", 2, fh);
757 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
760 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
764 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
767 return nfsd_lookup(rqstp, &cstate->current_fh,
768 u->lookup.lo_name, u->lookup.lo_len,
769 &cstate->current_fh);
773 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
776 struct nfsd4_read *read = &u->read;
780 if (read->rd_offset >= OFFSET_MAX)
783 trace_nfsd_read_start(rqstp, &cstate->current_fh,
784 read->rd_offset, read->rd_length);
787 * If we do a zero copy read, then a client will see read data
788 * that reflects the state of the file *after* performing the
789 * following compound.
791 * To ensure proper ordering, we therefore turn off zero copy if
792 * the client wants us to do more in this compound:
794 if (!nfsd4_last_compound_op(rqstp))
795 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
798 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
799 &read->rd_stateid, RD_STATE,
802 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
807 read->rd_rqstp = rqstp;
808 read->rd_fhp = &cstate->current_fh;
814 nfsd4_read_release(union nfsd4_op_u *u)
817 nfsd_file_put(u->read.rd_nf);
818 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
819 u->read.rd_offset, u->read.rd_length);
823 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_readdir *readdir = &u->readdir;
827 u64 cookie = readdir->rd_cookie;
828 static const nfs4_verifier zeroverf;
830 /* no need to check permission - this will be done in nfsd_readdir() */
832 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
835 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
836 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
837 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
839 if ((cookie == 1) || (cookie == 2) ||
840 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
841 return nfserr_bad_cookie;
843 readdir->rd_rqstp = rqstp;
844 readdir->rd_fhp = &cstate->current_fh;
849 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
852 u->readlink.rl_rqstp = rqstp;
853 u->readlink.rl_fhp = &cstate->current_fh;
858 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
861 struct nfsd4_remove *remove = &u->remove;
864 if (opens_in_grace(SVC_NET(rqstp)))
866 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
867 remove->rm_name, remove->rm_namelen);
869 fh_unlock(&cstate->current_fh);
870 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
876 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
879 struct nfsd4_rename *rename = &u->rename;
882 if (opens_in_grace(SVC_NET(rqstp)))
884 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
885 rename->rn_snamelen, &cstate->current_fh,
886 rename->rn_tname, rename->rn_tnamelen);
889 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
890 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
895 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
898 struct nfsd4_secinfo *secinfo = &u->secinfo;
899 struct svc_export *exp;
900 struct dentry *dentry;
903 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
906 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
907 secinfo->si_name, secinfo->si_namelen,
911 fh_unlock(&cstate->current_fh);
912 if (d_really_is_negative(dentry)) {
916 secinfo->si_exp = exp;
918 if (cstate->minorversion)
919 /* See rfc 5661 section 2.6.3.1.1.8 */
920 fh_put(&cstate->current_fh);
925 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
930 switch (u->secinfo_no_name.sin_style) {
931 case NFS4_SECINFO_STYLE4_CURRENT_FH:
933 case NFS4_SECINFO_STYLE4_PARENT:
934 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
942 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
943 fh_put(&cstate->current_fh);
948 nfsd4_secinfo_release(union nfsd4_op_u *u)
950 if (u->secinfo.si_exp)
951 exp_put(u->secinfo.si_exp);
955 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
957 if (u->secinfo_no_name.sin_exp)
958 exp_put(u->secinfo_no_name.sin_exp);
962 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
965 struct nfsd4_setattr *setattr = &u->setattr;
966 __be32 status = nfs_ok;
969 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
970 status = nfs4_preprocess_stateid_op(rqstp, cstate,
971 &cstate->current_fh, &setattr->sa_stateid,
972 WR_STATE, NULL, NULL);
974 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
978 err = fh_want_write(&cstate->current_fh);
980 return nfserrno(err);
983 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
988 if (setattr->sa_acl != NULL)
989 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
993 if (setattr->sa_label.len)
994 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
998 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1001 fh_drop_write(&cstate->current_fh);
1006 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1007 union nfsd4_op_u *u)
1009 struct nfsd4_write *write = &u->write;
1010 stateid_t *stateid = &write->wr_stateid;
1011 struct nfsd_file *nf = NULL;
1012 __be32 status = nfs_ok;
1016 if (write->wr_offset >= OFFSET_MAX)
1017 return nfserr_inval;
1019 cnt = write->wr_buflen;
1020 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1021 write->wr_offset, cnt);
1022 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1023 stateid, WR_STATE, &nf, NULL);
1025 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1029 write->wr_how_written = write->wr_stable_how;
1031 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages,
1032 write->wr_payload.head, write->wr_buflen);
1033 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1035 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1036 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1037 write->wr_how_written,
1038 (__be32 *)write->wr_verifier.data);
1041 write->wr_bytes_written = cnt;
1042 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1043 write->wr_offset, cnt);
1048 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1049 stateid_t *src_stateid, struct nfsd_file **src,
1050 stateid_t *dst_stateid, struct nfsd_file **dst)
1054 if (!cstate->save_fh.fh_dentry)
1055 return nfserr_nofilehandle;
1057 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1058 src_stateid, RD_STATE, src, NULL);
1060 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1064 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1065 dst_stateid, WR_STATE, dst, NULL);
1067 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1071 /* fix up for NFS-specific error code */
1072 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1073 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1074 status = nfserr_wrong_type;
1081 nfsd_file_put(*dst);
1083 nfsd_file_put(*src);
1088 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1089 union nfsd4_op_u *u)
1091 struct nfsd4_clone *clone = &u->clone;
1092 struct nfsd_file *src, *dst;
1095 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1096 &clone->cl_dst_stateid, &dst);
1100 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1101 dst, clone->cl_dst_pos, clone->cl_count,
1102 EX_ISSYNC(cstate->current_fh.fh_export));
1110 void nfs4_put_copy(struct nfsd4_copy *copy)
1112 if (!refcount_dec_and_test(©->refcount))
1118 check_and_set_stop_copy(struct nfsd4_copy *copy)
1122 spin_lock(©->cp_clp->async_lock);
1123 value = copy->stopped;
1125 copy->stopped = true;
1126 spin_unlock(©->cp_clp->async_lock);
1130 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1132 /* only 1 thread should stop the copy */
1133 if (!check_and_set_stop_copy(copy))
1134 kthread_stop(copy->copy_task);
1135 nfs4_put_copy(copy);
1138 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1140 struct nfsd4_copy *copy = NULL;
1142 spin_lock(&clp->async_lock);
1143 if (!list_empty(&clp->async_copies)) {
1144 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1146 refcount_inc(©->refcount);
1148 spin_unlock(&clp->async_lock);
1152 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1154 struct nfsd4_copy *copy;
1156 while ((copy = nfsd4_get_copy(clp)) != NULL)
1157 nfsd4_stop_copy(copy);
1159 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
1161 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1162 struct nfs_fh *src_fh,
1163 nfs4_stateid *stateid);
1164 extern void nfs42_ssc_close(struct file *filep);
1166 extern void nfs_sb_deactive(struct super_block *sb);
1168 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1171 * Support one copy source server for now.
1174 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1175 struct vfsmount **mount)
1177 struct file_system_type *type;
1178 struct vfsmount *ss_mnt;
1179 struct nfs42_netaddr *naddr;
1180 struct sockaddr_storage tmp_addr;
1181 size_t tmp_addrlen, match_netid_len = 3;
1182 char *startsep = "", *endsep = "", *match_netid = "tcp";
1183 char *ipaddr, *dev_name, *raw_data;
1185 __be32 status = nfserr_inval;
1187 naddr = &nss->u.nl4_addr;
1188 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1190 (struct sockaddr *)&tmp_addr,
1192 if (tmp_addrlen == 0)
1195 if (tmp_addr.ss_family == AF_INET6) {
1198 match_netid = "tcp6";
1199 match_netid_len = 4;
1202 if (naddr->netid_len != match_netid_len ||
1203 strncmp(naddr->netid, match_netid, naddr->netid_len))
1206 /* Construct the raw data for the vfs_kern_mount call */
1207 len = RPC_MAX_ADDRBUFLEN + 1;
1208 ipaddr = kzalloc(len, GFP_KERNEL);
1212 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1214 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1216 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1217 raw_data = kzalloc(raw_len, GFP_KERNEL);
1219 goto out_free_ipaddr;
1221 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1223 status = nfserr_nodev;
1224 type = get_fs_type("nfs");
1226 goto out_free_rawdata;
1228 /* Set the server:<export> for the vfs_kern_mount call */
1229 dev_name = kzalloc(len + 5, GFP_KERNEL);
1231 goto out_free_rawdata;
1232 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1234 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1235 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1236 module_put(type->owner);
1238 goto out_free_devname;
1254 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1256 nfs_do_sb_deactive(ss_mnt->mnt_sb);
1261 * Verify COPY destination stateid.
1263 * Connect to the source server with NFSv4.1.
1264 * Create the source struct file for nfsd_copy_range.
1265 * Called with COPY cstate:
1266 * SAVED_FH: source filehandle
1267 * CURRENT_FH: destination filehandle
1270 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1271 struct nfsd4_compound_state *cstate,
1272 struct nfsd4_copy *copy, struct vfsmount **mount)
1274 struct svc_fh *s_fh = NULL;
1275 stateid_t *s_stid = ©->cp_src_stateid;
1276 __be32 status = nfserr_inval;
1278 /* Verify the destination stateid and set dst struct file*/
1279 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1280 ©->cp_dst_stateid,
1281 WR_STATE, ©->nf_dst, NULL);
1285 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
1289 s_fh = &cstate->save_fh;
1291 copy->c_fh.size = s_fh->fh_handle.fh_size;
1292 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
1293 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1294 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1295 sizeof(stateid_opaque_t));
1303 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1304 struct nfsd_file *dst)
1306 nfs42_ssc_close(src->nf_file);
1307 /* 'src' is freed by nfsd4_do_async_copy */
1312 #else /* CONFIG_NFSD_V4_2_INTER_SSC */
1315 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1316 struct nfsd4_compound_state *cstate,
1317 struct nfsd4_copy *copy,
1318 struct vfsmount **mount)
1321 return nfserr_inval;
1325 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1326 struct nfsd_file *dst)
1331 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1335 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1336 struct nfs_fh *src_fh,
1337 nfs4_stateid *stateid)
1341 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1344 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1345 struct nfsd4_compound_state *cstate,
1346 struct nfsd4_copy *copy)
1348 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1349 ©->nf_src, ©->cp_dst_stateid,
1354 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1360 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1362 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1364 nfs4_put_copy(copy);
1367 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1368 struct rpc_task *task)
1373 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1374 .release = nfsd4_cb_offload_release,
1375 .done = nfsd4_cb_offload_done
1378 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1380 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1381 copy->cp_synchronous = sync;
1382 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1385 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1387 ssize_t bytes_copied = 0;
1388 size_t bytes_total = copy->cp_count;
1389 u64 src_pos = copy->cp_src_pos;
1390 u64 dst_pos = copy->cp_dst_pos;
1393 if (kthread_should_stop())
1395 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1396 src_pos, copy->nf_dst->nf_file, dst_pos,
1398 if (bytes_copied <= 0)
1400 bytes_total -= bytes_copied;
1401 copy->cp_res.wr_bytes_written += bytes_copied;
1402 src_pos += bytes_copied;
1403 dst_pos += bytes_copied;
1404 } while (bytes_total > 0 && !copy->cp_synchronous);
1405 return bytes_copied;
1408 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1413 bytes = _nfsd_copy_file_range(copy);
1414 /* for async copy, we ignore the error, client can always retry
1417 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1418 status = nfserrno(bytes);
1420 nfsd4_init_copy_res(copy, sync);
1424 if (!copy->cp_intra) /* Inter server SSC */
1425 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1428 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1433 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1435 dst->cp_src_pos = src->cp_src_pos;
1436 dst->cp_dst_pos = src->cp_dst_pos;
1437 dst->cp_count = src->cp_count;
1438 dst->cp_synchronous = src->cp_synchronous;
1439 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1440 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1441 dst->cp_clp = src->cp_clp;
1442 dst->nf_dst = nfsd_file_get(src->nf_dst);
1443 dst->cp_intra = src->cp_intra;
1444 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1445 dst->nf_src = nfsd_file_get(src->nf_src);
1447 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1448 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1449 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1450 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1451 dst->ss_mnt = src->ss_mnt;
1454 static void cleanup_async_copy(struct nfsd4_copy *copy)
1456 nfs4_free_copy_state(copy);
1457 nfsd_file_put(copy->nf_dst);
1459 nfsd_file_put(copy->nf_src);
1460 spin_lock(©->cp_clp->async_lock);
1461 list_del(©->copies);
1462 spin_unlock(©->cp_clp->async_lock);
1463 nfs4_put_copy(copy);
1466 static int nfsd4_do_async_copy(void *data)
1468 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1469 struct nfsd4_copy *cb_copy;
1471 if (!copy->cp_intra) { /* Inter server SSC */
1472 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1473 if (!copy->nf_src) {
1474 copy->nfserr = nfserr_serverfault;
1475 nfsd4_interssc_disconnect(copy->ss_mnt);
1478 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1480 if (IS_ERR(copy->nf_src->nf_file)) {
1481 copy->nfserr = nfserr_offload_denied;
1482 nfsd4_interssc_disconnect(copy->ss_mnt);
1487 copy->nfserr = nfsd4_do_copy(copy, 0);
1489 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1492 refcount_set(&cb_copy->refcount, 1);
1493 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1494 cb_copy->cp_clp = copy->cp_clp;
1495 cb_copy->nfserr = copy->nfserr;
1496 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1497 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1498 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1499 nfsd4_run_cb(&cb_copy->cp_cb);
1501 if (!copy->cp_intra)
1502 kfree(copy->nf_src);
1503 cleanup_async_copy(copy);
1508 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1509 union nfsd4_op_u *u)
1511 struct nfsd4_copy *copy = &u->copy;
1513 struct nfsd4_copy *async_copy = NULL;
1515 if (!copy->cp_intra) { /* Inter server SSC */
1516 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1517 status = nfserr_notsupp;
1520 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1523 return nfserr_offload_denied;
1525 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1530 copy->cp_clp = cstate->clp;
1531 memcpy(©->fh, &cstate->current_fh.fh_handle,
1532 sizeof(struct knfsd_fh));
1533 if (!copy->cp_synchronous) {
1534 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1536 status = nfserrno(-ENOMEM);
1537 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1540 if (!nfs4_init_copy_state(nn, copy))
1542 refcount_set(&async_copy->refcount, 1);
1543 memcpy(©->cp_res.cb_stateid, ©->cp_stateid,
1544 sizeof(copy->cp_stateid));
1545 dup_copy_fields(copy, async_copy);
1546 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1547 async_copy, "%s", "copy thread");
1548 if (IS_ERR(async_copy->copy_task))
1550 spin_lock(&async_copy->cp_clp->async_lock);
1551 list_add(&async_copy->copies,
1552 &async_copy->cp_clp->async_copies);
1553 spin_unlock(&async_copy->cp_clp->async_lock);
1554 wake_up_process(async_copy->copy_task);
1557 status = nfsd4_do_copy(copy, 1);
1563 cleanup_async_copy(async_copy);
1564 status = nfserrno(-ENOMEM);
1565 if (!copy->cp_intra)
1566 nfsd4_interssc_disconnect(copy->ss_mnt);
1571 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1573 struct nfsd4_copy *copy;
1575 spin_lock(&clp->async_lock);
1576 list_for_each_entry(copy, &clp->async_copies, copies) {
1577 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
1579 refcount_inc(©->refcount);
1580 spin_unlock(&clp->async_lock);
1583 spin_unlock(&clp->async_lock);
1588 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1589 struct nfsd4_compound_state *cstate,
1590 union nfsd4_op_u *u)
1592 struct nfsd4_offload_status *os = &u->offload_status;
1593 struct nfsd4_copy *copy;
1594 struct nfs4_client *clp = cstate->clp;
1596 copy = find_async_copy(clp, &os->stateid);
1598 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1600 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1602 nfsd4_stop_copy(copy);
1608 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1609 union nfsd4_op_u *u)
1611 struct nfsd4_copy_notify *cn = &u->copy_notify;
1613 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1614 struct nfs4_stid *stid;
1615 struct nfs4_cpntf_state *cps;
1616 struct nfs4_client *clp = cstate->clp;
1618 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1619 &cn->cpn_src_stateid, RD_STATE, NULL,
1624 cn->cpn_sec = nn->nfsd4_lease;
1627 status = nfserrno(-ENOMEM);
1628 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1631 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1632 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1633 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1635 /* For now, only return one server address in cpn_src, the
1636 * address used by the client to connect to this server.
1638 cn->cpn_src.nl4_type = NL4_NETADDR;
1639 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1640 &cn->cpn_src.u.nl4_addr);
1641 WARN_ON_ONCE(status);
1643 nfs4_put_cpntf_state(nn, cps);
1647 nfs4_put_stid(stid);
1652 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1653 struct nfsd4_fallocate *fallocate, int flags)
1656 struct nfsd_file *nf;
1658 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1659 &fallocate->falloc_stateid,
1660 WR_STATE, &nf, NULL);
1661 if (status != nfs_ok) {
1662 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1666 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1667 fallocate->falloc_offset,
1668 fallocate->falloc_length,
1674 nfsd4_offload_status(struct svc_rqst *rqstp,
1675 struct nfsd4_compound_state *cstate,
1676 union nfsd4_op_u *u)
1678 struct nfsd4_offload_status *os = &u->offload_status;
1680 struct nfsd4_copy *copy;
1681 struct nfs4_client *clp = cstate->clp;
1683 copy = find_async_copy(clp, &os->stateid);
1685 os->count = copy->cp_res.wr_bytes_written;
1686 nfs4_put_copy(copy);
1688 status = nfserr_bad_stateid;
1694 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1695 union nfsd4_op_u *u)
1697 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1701 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1702 union nfsd4_op_u *u)
1704 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1705 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1709 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1710 union nfsd4_op_u *u)
1712 struct nfsd4_seek *seek = &u->seek;
1715 struct nfsd_file *nf;
1717 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1718 &seek->seek_stateid,
1719 RD_STATE, &nf, NULL);
1721 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1725 switch (seek->seek_whence) {
1726 case NFS4_CONTENT_DATA:
1729 case NFS4_CONTENT_HOLE:
1733 status = nfserr_union_notsupp;
1738 * Note: This call does change file->f_pos, but nothing in NFSD
1739 * should ever file->f_pos.
1741 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1742 if (seek->seek_pos < 0)
1743 status = nfserrno(seek->seek_pos);
1744 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1745 seek->seek_eof = true;
1752 /* This routine never returns NFS_OK! If there are no other errors, it
1753 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1754 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1755 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1758 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1759 struct nfsd4_verify *verify)
1765 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1769 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1773 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1774 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1775 return nfserr_inval;
1776 if (verify->ve_attrlen & 3)
1777 return nfserr_inval;
1780 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1782 count = 4 + (verify->ve_attrlen >> 2);
1783 buf = kmalloc(count << 2, GFP_KERNEL);
1785 return nfserr_jukebox;
1788 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1789 cstate->current_fh.fh_export,
1790 cstate->current_fh.fh_dentry,
1794 * If nfsd4_encode_fattr() ran out of space, assume that's because
1795 * the attributes are longer (hence different) than those given:
1797 if (status == nfserr_resource)
1798 status = nfserr_not_same;
1803 p = buf + 1 + ntohl(buf[0]);
1804 status = nfserr_not_same;
1805 if (ntohl(*p++) != verify->ve_attrlen)
1807 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1808 status = nfserr_same;
1816 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1817 union nfsd4_op_u *u)
1821 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1822 return status == nfserr_not_same ? nfs_ok : status;
1826 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1827 union nfsd4_op_u *u)
1831 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1832 return status == nfserr_same ? nfs_ok : status;
1835 #ifdef CONFIG_NFSD_PNFS
1836 static const struct nfsd4_layout_ops *
1837 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1839 if (!exp->ex_layout_types) {
1840 dprintk("%s: export does not support pNFS\n", __func__);
1844 if (layout_type >= LAYOUT_TYPE_MAX ||
1845 !(exp->ex_layout_types & (1 << layout_type))) {
1846 dprintk("%s: layout type %d not supported\n",
1847 __func__, layout_type);
1851 return nfsd4_layout_ops[layout_type];
1855 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1856 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1858 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1859 const struct nfsd4_layout_ops *ops;
1860 struct nfsd4_deviceid_map *map;
1861 struct svc_export *exp;
1864 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1866 gdp->gd_layout_type,
1867 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1870 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1872 dprintk("%s: couldn't find device ID to export mapping!\n",
1874 return nfserr_noent;
1877 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1879 dprintk("%s: could not find device id\n", __func__);
1880 return nfserr_noent;
1883 nfserr = nfserr_layoutunavailable;
1884 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1889 if (gdp->gd_maxcount != 0) {
1890 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1891 rqstp, cstate->session->se_client, gdp);
1894 gdp->gd_notify_types &= ops->notify_types;
1901 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1903 kfree(u->getdeviceinfo.gd_device);
1907 nfsd4_layoutget(struct svc_rqst *rqstp,
1908 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1910 struct nfsd4_layoutget *lgp = &u->layoutget;
1911 struct svc_fh *current_fh = &cstate->current_fh;
1912 const struct nfsd4_layout_ops *ops;
1913 struct nfs4_layout_stateid *ls;
1915 int accmode = NFSD_MAY_READ_IF_EXEC;
1917 switch (lgp->lg_seg.iomode) {
1919 accmode |= NFSD_MAY_READ;
1922 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1925 dprintk("%s: invalid iomode %d\n",
1926 __func__, lgp->lg_seg.iomode);
1927 nfserr = nfserr_badiomode;
1931 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1935 nfserr = nfserr_layoutunavailable;
1936 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1941 * Verify minlength and range as per RFC5661:
1942 * o If loga_length is less than loga_minlength,
1943 * the metadata server MUST return NFS4ERR_INVAL.
1944 * o If the sum of loga_offset and loga_minlength exceeds
1945 * NFS4_UINT64_MAX, and loga_minlength is not
1946 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1947 * o If the sum of loga_offset and loga_length exceeds
1948 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1949 * the error NFS4ERR_INVAL MUST result.
1951 nfserr = nfserr_inval;
1952 if (lgp->lg_seg.length < lgp->lg_minlength ||
1953 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1954 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1955 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1956 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1958 if (lgp->lg_seg.length == 0)
1961 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1962 true, lgp->lg_layout_type, &ls);
1964 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1968 nfserr = nfserr_recallconflict;
1969 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1972 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1977 nfserr = nfsd4_insert_layout(lgp, ls);
1980 mutex_unlock(&ls->ls_mutex);
1981 nfs4_put_stid(&ls->ls_stid);
1987 nfsd4_layoutget_release(union nfsd4_op_u *u)
1989 kfree(u->layoutget.lg_content);
1993 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1994 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1996 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1997 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1998 struct svc_fh *current_fh = &cstate->current_fh;
1999 const struct nfsd4_layout_ops *ops;
2000 loff_t new_size = lcp->lc_last_wr + 1;
2001 struct inode *inode;
2002 struct nfs4_layout_stateid *ls;
2005 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2009 nfserr = nfserr_layoutunavailable;
2010 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2013 inode = d_inode(current_fh->fh_dentry);
2015 nfserr = nfserr_inval;
2016 if (new_size <= seg->offset) {
2017 dprintk("pnfsd: last write before layout segment\n");
2020 if (new_size > seg->offset + seg->length) {
2021 dprintk("pnfsd: last write beyond layout segment\n");
2024 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2025 dprintk("pnfsd: layoutcommit beyond EOF\n");
2029 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2030 false, lcp->lc_layout_type,
2033 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2034 /* fixup error code as per RFC5661 */
2035 if (nfserr == nfserr_bad_stateid)
2036 nfserr = nfserr_badlayout;
2040 /* LAYOUTCOMMIT does not require any serialization */
2041 mutex_unlock(&ls->ls_mutex);
2043 if (new_size > i_size_read(inode)) {
2044 lcp->lc_size_chg = 1;
2045 lcp->lc_newsize = new_size;
2047 lcp->lc_size_chg = 0;
2050 nfserr = ops->proc_layoutcommit(inode, lcp);
2051 nfs4_put_stid(&ls->ls_stid);
2057 nfsd4_layoutreturn(struct svc_rqst *rqstp,
2058 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2060 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2061 struct svc_fh *current_fh = &cstate->current_fh;
2064 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2068 nfserr = nfserr_layoutunavailable;
2069 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2072 switch (lrp->lr_seg.iomode) {
2078 dprintk("%s: invalid iomode %d\n", __func__,
2079 lrp->lr_seg.iomode);
2080 nfserr = nfserr_inval;
2084 switch (lrp->lr_return_type) {
2086 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2090 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2093 dprintk("%s: invalid return_type %d\n", __func__,
2094 lrp->lr_return_type);
2095 nfserr = nfserr_inval;
2101 #endif /* CONFIG_NFSD_PNFS */
2104 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2105 union nfsd4_op_u *u)
2107 struct nfsd4_getxattr *getxattr = &u->getxattr;
2109 return nfsd_getxattr(rqstp, &cstate->current_fh,
2110 getxattr->getxa_name, &getxattr->getxa_buf,
2111 &getxattr->getxa_len);
2115 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2116 union nfsd4_op_u *u)
2118 struct nfsd4_setxattr *setxattr = &u->setxattr;
2121 if (opens_in_grace(SVC_NET(rqstp)))
2122 return nfserr_grace;
2124 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2125 setxattr->setxa_buf, setxattr->setxa_len,
2126 setxattr->setxa_flags);
2129 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2135 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2136 union nfsd4_op_u *u)
2139 * Get the entire list, then copy out only the user attributes
2140 * in the encode function.
2142 return nfsd_listxattr(rqstp, &cstate->current_fh,
2143 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2147 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2148 union nfsd4_op_u *u)
2150 struct nfsd4_removexattr *removexattr = &u->removexattr;
2153 if (opens_in_grace(SVC_NET(rqstp)))
2154 return nfserr_grace;
2156 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2157 removexattr->rmxa_name);
2160 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2169 nfsd4_proc_null(struct svc_rqst *rqstp)
2174 static inline void nfsd4_increment_op_stats(u32 opnum)
2176 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2177 nfsdstats.nfs4_opcount[opnum]++;
2180 static const struct nfsd4_operation nfsd4_ops[];
2182 static const char *nfsd4_op_name(unsigned opnum);
2185 * Enforce NFSv4.1 COMPOUND ordering rules:
2187 * Also note, enforced elsewhere:
2188 * - SEQUENCE other than as first op results in
2189 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2190 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2191 * (Enforced in nfsd4_bind_conn_to_session().)
2192 * - DESTROY_SESSION must be the final operation in a compound, if
2193 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2194 * (Enforced in nfsd4_destroy_session().)
2196 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2198 struct nfsd4_op *first_op = &args->ops[0];
2200 /* These ordering requirements don't apply to NFSv4.0: */
2201 if (args->minorversion == 0)
2203 /* This is weird, but OK, not our problem: */
2204 if (args->opcnt == 0)
2206 if (first_op->status == nfserr_op_illegal)
2208 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2209 return nfserr_op_not_in_session;
2210 if (first_op->opnum == OP_SEQUENCE)
2213 * So first_op is something allowed outside a session, like
2214 * EXCHANGE_ID; but then it has to be the only op in the
2217 if (args->opcnt != 1)
2218 return nfserr_not_only_op;
2222 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2224 return &nfsd4_ops[op->opnum];
2227 bool nfsd4_cache_this_op(struct nfsd4_op *op)
2229 if (op->opnum == OP_ILLEGAL)
2231 return OPDESC(op)->op_flags & OP_CACHEME;
2234 static bool need_wrongsec_check(struct svc_rqst *rqstp)
2236 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2237 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2238 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2239 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2240 const struct nfsd4_operation *thisd = OPDESC(this);
2241 const struct nfsd4_operation *nextd;
2244 * Most ops check wronsec on our own; only the putfh-like ops
2245 * have special rules.
2247 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2250 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2251 * put-filehandle operation if we're not going to use the
2254 if (argp->opcnt == resp->opcnt)
2256 if (next->opnum == OP_ILLEGAL)
2258 nextd = OPDESC(next);
2260 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2261 * errors themselves as necessary; others should check for them
2264 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2267 static void svcxdr_init_encode(struct svc_rqst *rqstp,
2268 struct nfsd4_compoundres *resp)
2270 struct xdr_stream *xdr = &resp->xdr;
2271 struct xdr_buf *buf = &rqstp->rq_res;
2272 struct kvec *head = buf->head;
2276 xdr->p = head->iov_base + head->iov_len;
2277 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
2278 /* Tail and page_len should be zero at this point: */
2279 buf->len = buf->head[0].iov_len;
2280 xdr_reset_scratch_buffer(xdr);
2281 xdr->page_ptr = buf->pages - 1;
2282 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
2283 - rqstp->rq_auth_slack;
2286 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
2288 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2290 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2291 struct nfsd4_copy *copy;
2292 struct nfsd4_putfh *putfh;
2295 /* traverse all operation and if it's a COPY compound, mark the
2296 * source filehandle to skip verification
2298 for (i = 0; i < args->opcnt; i++) {
2300 if (op->opnum == OP_PUTFH)
2302 else if (op->opnum == OP_SAVEFH)
2303 saved_op = current_op;
2304 else if (op->opnum == OP_RESTOREFH)
2305 current_op = saved_op;
2306 else if (op->opnum == OP_COPY) {
2307 copy = (struct nfsd4_copy *)&op->u;
2309 op->status = nfserr_nofilehandle;
2312 putfh = (struct nfsd4_putfh *)&saved_op->u;
2313 if (!copy->cp_intra)
2314 putfh->no_verify = true;
2320 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2329 nfsd4_proc_compound(struct svc_rqst *rqstp)
2331 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2332 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2333 struct nfsd4_op *op;
2334 struct nfsd4_compound_state *cstate = &resp->cstate;
2335 struct svc_fh *current_fh = &cstate->current_fh;
2336 struct svc_fh *save_fh = &cstate->save_fh;
2337 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2340 svcxdr_init_encode(rqstp, resp);
2341 resp->tagp = resp->xdr.p;
2342 /* reserve space for: taglen, tag, and opcnt */
2343 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
2344 resp->taglen = args->taglen;
2345 resp->tag = args->tag;
2346 resp->rqstp = rqstp;
2347 cstate->minorversion = args->minorversion;
2348 fh_init(current_fh, NFS4_FHSIZE);
2349 fh_init(save_fh, NFS4_FHSIZE);
2351 * Don't use the deferral mechanism for NFSv4; compounds make it
2352 * too hard to avoid non-idempotency problems.
2354 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2357 * According to RFC3010, this takes precedence over all other errors.
2359 status = nfserr_minor_vers_mismatch;
2360 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2362 status = nfserr_resource;
2363 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2366 status = nfs41_check_op_ordering(args);
2369 op->status = status;
2373 check_if_stalefh_allowed(args);
2375 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2377 trace_nfsd_compound(rqstp, args->opcnt);
2378 while (!status && resp->opcnt < args->opcnt) {
2379 op = &args->ops[resp->opcnt++];
2382 * The XDR decode routines may have pre-set op->status;
2383 * for example, if there is a miscellaneous XDR error
2384 * it will be set to nfserr_bad_xdr.
2387 if (op->opnum == OP_OPEN)
2388 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2391 if (!current_fh->fh_dentry &&
2392 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2393 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2394 op->status = nfserr_nofilehandle;
2397 } else if (current_fh->fh_export &&
2398 current_fh->fh_export->ex_fslocs.migrated &&
2399 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2400 op->status = nfserr_moved;
2404 fh_clear_wcc(current_fh);
2406 /* If op is non-idempotent */
2407 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2409 * Don't execute this op if we couldn't encode a
2412 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2414 * Plus if there's another operation, make sure
2415 * we'll have space to at least encode an error:
2417 if (resp->opcnt < args->opcnt)
2418 plen += COMPOUND_ERR_SLACK_SPACE;
2419 op->status = nfsd4_check_resp_size(resp, plen);
2425 if (op->opdesc->op_get_currentstateid)
2426 op->opdesc->op_get_currentstateid(cstate, &op->u);
2427 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2429 /* Only from SEQUENCE */
2430 if (cstate->status == nfserr_replay_cache) {
2431 dprintk("%s NFS4.1 replay from cache\n", __func__);
2432 status = op->status;
2436 if (op->opdesc->op_set_currentstateid)
2437 op->opdesc->op_set_currentstateid(cstate, &op->u);
2439 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2440 clear_current_stateid(cstate);
2442 if (current_fh->fh_export &&
2443 need_wrongsec_check(rqstp))
2444 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2447 if (op->status == nfserr_replay_me) {
2448 op->replay = &cstate->replay_owner->so_replay;
2449 nfsd4_encode_replay(&resp->xdr, op);
2450 status = op->status = op->replay->rp_status;
2452 nfsd4_encode_operation(resp, op);
2453 status = op->status;
2456 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2457 nfsd4_op_name(op->opnum));
2459 nfsd4_cstate_clear_replay(cstate);
2460 nfsd4_increment_op_stats(op->opnum);
2465 BUG_ON(cstate->replay_owner);
2467 cstate->status = status;
2468 /* Reset deferral mechanism for RPC deferrals */
2469 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2473 #define op_encode_hdr_size (2)
2474 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2475 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2476 #define op_encode_change_info_maxsz (5)
2477 #define nfs4_fattr_bitmap_maxsz (4)
2479 /* We'll fall back on returning no lockowner if run out of space: */
2480 #define op_encode_lockowner_maxsz (0)
2481 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2483 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2485 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2486 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2487 op_encode_ace_maxsz)
2489 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2491 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2493 return (op_encode_hdr_size) * sizeof(__be32);
2496 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2498 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2501 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2503 /* ac_supported, ac_resp_access */
2504 return (op_encode_hdr_size + 2)* sizeof(__be32);
2507 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2509 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2512 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2514 return (op_encode_hdr_size + op_encode_change_info_maxsz
2515 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2519 * Note since this is an idempotent operation we won't insist on failing
2520 * the op prematurely if the estimate is too large. We may turn off splice
2521 * reads unnecessarily.
2523 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2524 struct nfsd4_op *op)
2526 u32 *bmap = op->u.getattr.ga_bmval;
2527 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2530 if (bmap0 & FATTR4_WORD0_ACL)
2531 return svc_max_payload(rqstp);
2532 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2533 return svc_max_payload(rqstp);
2535 if (bmap1 & FATTR4_WORD1_OWNER) {
2536 ret += IDMAP_NAMESZ + 4;
2537 bmap1 &= ~FATTR4_WORD1_OWNER;
2539 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2540 ret += IDMAP_NAMESZ + 4;
2541 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2543 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2544 ret += NFS4_FHSIZE + 4;
2545 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2547 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2548 ret += NFS4_MAXLABELLEN + 12;
2549 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2552 * Largest of remaining attributes are 16 bytes (e.g.,
2553 * supported_attributes)
2555 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2556 /* bitmask, length */
2561 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2563 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2566 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2568 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2572 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2574 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2578 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2580 return (op_encode_hdr_size + op_encode_stateid_maxsz
2581 + op_encode_change_info_maxsz + 1
2582 + nfs4_fattr_bitmap_maxsz
2583 + op_encode_delegation_maxsz) * sizeof(__be32);
2586 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2588 u32 maxcount = 0, rlen = 0;
2590 maxcount = svc_max_payload(rqstp);
2591 rlen = min(op->u.read.rd_length, maxcount);
2593 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2596 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2598 u32 maxcount = svc_max_payload(rqstp);
2599 u32 rlen = min(op->u.read.rd_length, maxcount);
2601 * If we detect that the file changed during hole encoding, then we
2602 * recover by encoding the remaining reply as data. This means we need
2603 * to set aside enough room to encode two data segments.
2605 u32 seg_len = 2 * (1 + 2 + 1);
2607 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2610 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2612 u32 maxcount = 0, rlen = 0;
2614 maxcount = svc_max_payload(rqstp);
2615 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2617 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2618 XDR_QUADLEN(rlen)) * sizeof(__be32);
2621 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2623 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2626 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2628 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2632 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2634 return (op_encode_hdr_size + op_encode_change_info_maxsz
2635 + op_encode_change_info_maxsz) * sizeof(__be32);
2638 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2639 struct nfsd4_op *op)
2641 return (op_encode_hdr_size
2642 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2645 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2647 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2651 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2653 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2656 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2658 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2659 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2662 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2664 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2668 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2670 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2673 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2675 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2676 1 + 1 + /* eir_flags, spr_how */\
2677 4 + /* spo_must_enforce & _allow with bitmap */\
2678 2 + /*eir_server_owner.so_minor_id */\
2679 /* eir_server_owner.so_major_id<> */\
2680 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2681 /* eir_server_scope<> */\
2682 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2683 1 + /* eir_server_impl_id array length */\
2684 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2687 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2689 return (op_encode_hdr_size + \
2690 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2691 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2694 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2696 return (op_encode_hdr_size + \
2697 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2698 2 + /* csr_sequence, csr_flags */\
2699 op_encode_channel_attrs_maxsz + \
2700 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2703 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2705 return (op_encode_hdr_size +
2706 1 /* wr_callback */ +
2707 op_encode_stateid_maxsz /* wr_callback */ +
2709 1 /* wr_committed */ +
2710 op_encode_verifier_maxsz +
2711 1 /* cr_consecutive */ +
2712 1 /* cr_synchronous */) * sizeof(__be32);
2715 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2716 struct nfsd4_op *op)
2718 return (op_encode_hdr_size +
2720 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2723 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2724 struct nfsd4_op *op)
2726 return (op_encode_hdr_size +
2727 3 /* cnr_lease_time */ +
2728 1 /* We support one cnr_source_server */ +
2729 1 /* cnr_stateid seq */ +
2730 op_encode_stateid_maxsz /* cnr_stateid */ +
2731 1 /* num cnr_source_server*/ +
2734 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2738 #ifdef CONFIG_NFSD_PNFS
2739 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2741 u32 maxcount = 0, rlen = 0;
2743 maxcount = svc_max_payload(rqstp);
2744 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2746 return (op_encode_hdr_size +
2747 1 /* gd_layout_type*/ +
2749 2 /* gd_notify_types */) * sizeof(__be32);
2753 * At this stage we don't really know what layout driver will handle the request,
2754 * so we need to define an arbitrary upper bound here.
2756 #define MAX_LAYOUT_SIZE 128
2757 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2759 return (op_encode_hdr_size +
2760 1 /* logr_return_on_close */ +
2761 op_encode_stateid_maxsz +
2762 1 /* nr of layouts */ +
2763 MAX_LAYOUT_SIZE) * sizeof(__be32);
2766 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2768 return (op_encode_hdr_size +
2769 1 /* locr_newsize */ +
2770 2 /* ns_size */) * sizeof(__be32);
2773 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2775 return (op_encode_hdr_size +
2776 1 /* lrs_stateid */ +
2777 op_encode_stateid_maxsz) * sizeof(__be32);
2779 #endif /* CONFIG_NFSD_PNFS */
2782 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2784 return (op_encode_hdr_size + 3) * sizeof(__be32);
2787 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2788 struct nfsd4_op *op)
2792 maxcount = svc_max_payload(rqstp);
2793 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2795 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2798 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2799 struct nfsd4_op *op)
2801 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2804 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2805 struct nfsd4_op *op)
2809 maxcount = svc_max_payload(rqstp);
2810 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2812 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2815 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2816 struct nfsd4_op *op)
2818 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2823 static const struct nfsd4_operation nfsd4_ops[] = {
2825 .op_func = nfsd4_access,
2826 .op_name = "OP_ACCESS",
2827 .op_rsize_bop = nfsd4_access_rsize,
2830 .op_func = nfsd4_close,
2831 .op_flags = OP_MODIFIES_SOMETHING,
2832 .op_name = "OP_CLOSE",
2833 .op_rsize_bop = nfsd4_status_stateid_rsize,
2834 .op_get_currentstateid = nfsd4_get_closestateid,
2835 .op_set_currentstateid = nfsd4_set_closestateid,
2838 .op_func = nfsd4_commit,
2839 .op_flags = OP_MODIFIES_SOMETHING,
2840 .op_name = "OP_COMMIT",
2841 .op_rsize_bop = nfsd4_commit_rsize,
2844 .op_func = nfsd4_create,
2845 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2846 .op_name = "OP_CREATE",
2847 .op_rsize_bop = nfsd4_create_rsize,
2849 [OP_DELEGRETURN] = {
2850 .op_func = nfsd4_delegreturn,
2851 .op_flags = OP_MODIFIES_SOMETHING,
2852 .op_name = "OP_DELEGRETURN",
2853 .op_rsize_bop = nfsd4_only_status_rsize,
2854 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2857 .op_func = nfsd4_getattr,
2858 .op_flags = ALLOWED_ON_ABSENT_FS,
2859 .op_rsize_bop = nfsd4_getattr_rsize,
2860 .op_name = "OP_GETATTR",
2863 .op_func = nfsd4_getfh,
2864 .op_name = "OP_GETFH",
2865 .op_rsize_bop = nfsd4_getfh_rsize,
2868 .op_func = nfsd4_link,
2869 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2871 .op_name = "OP_LINK",
2872 .op_rsize_bop = nfsd4_link_rsize,
2875 .op_func = nfsd4_lock,
2876 .op_flags = OP_MODIFIES_SOMETHING |
2877 OP_NONTRIVIAL_ERROR_ENCODE,
2878 .op_name = "OP_LOCK",
2879 .op_rsize_bop = nfsd4_lock_rsize,
2880 .op_set_currentstateid = nfsd4_set_lockstateid,
2883 .op_func = nfsd4_lockt,
2884 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2885 .op_name = "OP_LOCKT",
2886 .op_rsize_bop = nfsd4_lock_rsize,
2889 .op_func = nfsd4_locku,
2890 .op_flags = OP_MODIFIES_SOMETHING,
2891 .op_name = "OP_LOCKU",
2892 .op_rsize_bop = nfsd4_status_stateid_rsize,
2893 .op_get_currentstateid = nfsd4_get_lockustateid,
2896 .op_func = nfsd4_lookup,
2897 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2898 .op_name = "OP_LOOKUP",
2899 .op_rsize_bop = nfsd4_only_status_rsize,
2902 .op_func = nfsd4_lookupp,
2903 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2904 .op_name = "OP_LOOKUPP",
2905 .op_rsize_bop = nfsd4_only_status_rsize,
2908 .op_func = nfsd4_nverify,
2909 .op_name = "OP_NVERIFY",
2910 .op_rsize_bop = nfsd4_only_status_rsize,
2913 .op_func = nfsd4_open,
2914 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2915 .op_name = "OP_OPEN",
2916 .op_rsize_bop = nfsd4_open_rsize,
2917 .op_set_currentstateid = nfsd4_set_openstateid,
2919 [OP_OPEN_CONFIRM] = {
2920 .op_func = nfsd4_open_confirm,
2921 .op_flags = OP_MODIFIES_SOMETHING,
2922 .op_name = "OP_OPEN_CONFIRM",
2923 .op_rsize_bop = nfsd4_status_stateid_rsize,
2925 [OP_OPEN_DOWNGRADE] = {
2926 .op_func = nfsd4_open_downgrade,
2927 .op_flags = OP_MODIFIES_SOMETHING,
2928 .op_name = "OP_OPEN_DOWNGRADE",
2929 .op_rsize_bop = nfsd4_status_stateid_rsize,
2930 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2931 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2934 .op_func = nfsd4_putfh,
2935 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2936 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2937 .op_name = "OP_PUTFH",
2938 .op_rsize_bop = nfsd4_only_status_rsize,
2941 .op_func = nfsd4_putrootfh,
2942 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2943 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2944 .op_name = "OP_PUTPUBFH",
2945 .op_rsize_bop = nfsd4_only_status_rsize,
2948 .op_func = nfsd4_putrootfh,
2949 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2950 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2951 .op_name = "OP_PUTROOTFH",
2952 .op_rsize_bop = nfsd4_only_status_rsize,
2955 .op_func = nfsd4_read,
2956 .op_release = nfsd4_read_release,
2957 .op_name = "OP_READ",
2958 .op_rsize_bop = nfsd4_read_rsize,
2959 .op_get_currentstateid = nfsd4_get_readstateid,
2962 .op_func = nfsd4_readdir,
2963 .op_name = "OP_READDIR",
2964 .op_rsize_bop = nfsd4_readdir_rsize,
2967 .op_func = nfsd4_readlink,
2968 .op_name = "OP_READLINK",
2969 .op_rsize_bop = nfsd4_readlink_rsize,
2972 .op_func = nfsd4_remove,
2973 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2974 .op_name = "OP_REMOVE",
2975 .op_rsize_bop = nfsd4_remove_rsize,
2978 .op_func = nfsd4_rename,
2979 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2980 .op_name = "OP_RENAME",
2981 .op_rsize_bop = nfsd4_rename_rsize,
2984 .op_func = nfsd4_renew,
2985 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2986 | OP_MODIFIES_SOMETHING,
2987 .op_name = "OP_RENEW",
2988 .op_rsize_bop = nfsd4_only_status_rsize,
2992 .op_func = nfsd4_restorefh,
2993 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2994 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2995 .op_name = "OP_RESTOREFH",
2996 .op_rsize_bop = nfsd4_only_status_rsize,
2999 .op_func = nfsd4_savefh,
3000 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3001 .op_name = "OP_SAVEFH",
3002 .op_rsize_bop = nfsd4_only_status_rsize,
3005 .op_func = nfsd4_secinfo,
3006 .op_release = nfsd4_secinfo_release,
3007 .op_flags = OP_HANDLES_WRONGSEC,
3008 .op_name = "OP_SECINFO",
3009 .op_rsize_bop = nfsd4_secinfo_rsize,
3012 .op_func = nfsd4_setattr,
3013 .op_name = "OP_SETATTR",
3014 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3015 | OP_NONTRIVIAL_ERROR_ENCODE,
3016 .op_rsize_bop = nfsd4_setattr_rsize,
3017 .op_get_currentstateid = nfsd4_get_setattrstateid,
3019 [OP_SETCLIENTID] = {
3020 .op_func = nfsd4_setclientid,
3021 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3022 | OP_MODIFIES_SOMETHING | OP_CACHEME
3023 | OP_NONTRIVIAL_ERROR_ENCODE,
3024 .op_name = "OP_SETCLIENTID",
3025 .op_rsize_bop = nfsd4_setclientid_rsize,
3027 [OP_SETCLIENTID_CONFIRM] = {
3028 .op_func = nfsd4_setclientid_confirm,
3029 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3030 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3031 .op_name = "OP_SETCLIENTID_CONFIRM",
3032 .op_rsize_bop = nfsd4_only_status_rsize,
3035 .op_func = nfsd4_verify,
3036 .op_name = "OP_VERIFY",
3037 .op_rsize_bop = nfsd4_only_status_rsize,
3040 .op_func = nfsd4_write,
3041 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3042 .op_name = "OP_WRITE",
3043 .op_rsize_bop = nfsd4_write_rsize,
3044 .op_get_currentstateid = nfsd4_get_writestateid,
3046 [OP_RELEASE_LOCKOWNER] = {
3047 .op_func = nfsd4_release_lockowner,
3048 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3049 | OP_MODIFIES_SOMETHING,
3050 .op_name = "OP_RELEASE_LOCKOWNER",
3051 .op_rsize_bop = nfsd4_only_status_rsize,
3054 /* NFSv4.1 operations */
3055 [OP_EXCHANGE_ID] = {
3056 .op_func = nfsd4_exchange_id,
3057 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3058 | OP_MODIFIES_SOMETHING,
3059 .op_name = "OP_EXCHANGE_ID",
3060 .op_rsize_bop = nfsd4_exchange_id_rsize,
3062 [OP_BACKCHANNEL_CTL] = {
3063 .op_func = nfsd4_backchannel_ctl,
3064 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3065 .op_name = "OP_BACKCHANNEL_CTL",
3066 .op_rsize_bop = nfsd4_only_status_rsize,
3068 [OP_BIND_CONN_TO_SESSION] = {
3069 .op_func = nfsd4_bind_conn_to_session,
3070 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3071 | OP_MODIFIES_SOMETHING,
3072 .op_name = "OP_BIND_CONN_TO_SESSION",
3073 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3075 [OP_CREATE_SESSION] = {
3076 .op_func = nfsd4_create_session,
3077 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3078 | OP_MODIFIES_SOMETHING,
3079 .op_name = "OP_CREATE_SESSION",
3080 .op_rsize_bop = nfsd4_create_session_rsize,
3082 [OP_DESTROY_SESSION] = {
3083 .op_func = nfsd4_destroy_session,
3084 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3085 | OP_MODIFIES_SOMETHING,
3086 .op_name = "OP_DESTROY_SESSION",
3087 .op_rsize_bop = nfsd4_only_status_rsize,
3090 .op_func = nfsd4_sequence,
3091 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3092 .op_name = "OP_SEQUENCE",
3093 .op_rsize_bop = nfsd4_sequence_rsize,
3095 [OP_DESTROY_CLIENTID] = {
3096 .op_func = nfsd4_destroy_clientid,
3097 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3098 | OP_MODIFIES_SOMETHING,
3099 .op_name = "OP_DESTROY_CLIENTID",
3100 .op_rsize_bop = nfsd4_only_status_rsize,
3102 [OP_RECLAIM_COMPLETE] = {
3103 .op_func = nfsd4_reclaim_complete,
3104 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3105 .op_name = "OP_RECLAIM_COMPLETE",
3106 .op_rsize_bop = nfsd4_only_status_rsize,
3108 [OP_SECINFO_NO_NAME] = {
3109 .op_func = nfsd4_secinfo_no_name,
3110 .op_release = nfsd4_secinfo_no_name_release,
3111 .op_flags = OP_HANDLES_WRONGSEC,
3112 .op_name = "OP_SECINFO_NO_NAME",
3113 .op_rsize_bop = nfsd4_secinfo_rsize,
3115 [OP_TEST_STATEID] = {
3116 .op_func = nfsd4_test_stateid,
3117 .op_flags = ALLOWED_WITHOUT_FH,
3118 .op_name = "OP_TEST_STATEID",
3119 .op_rsize_bop = nfsd4_test_stateid_rsize,
3121 [OP_FREE_STATEID] = {
3122 .op_func = nfsd4_free_stateid,
3123 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3124 .op_name = "OP_FREE_STATEID",
3125 .op_get_currentstateid = nfsd4_get_freestateid,
3126 .op_rsize_bop = nfsd4_only_status_rsize,
3128 #ifdef CONFIG_NFSD_PNFS
3129 [OP_GETDEVICEINFO] = {
3130 .op_func = nfsd4_getdeviceinfo,
3131 .op_release = nfsd4_getdeviceinfo_release,
3132 .op_flags = ALLOWED_WITHOUT_FH,
3133 .op_name = "OP_GETDEVICEINFO",
3134 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3137 .op_func = nfsd4_layoutget,
3138 .op_release = nfsd4_layoutget_release,
3139 .op_flags = OP_MODIFIES_SOMETHING,
3140 .op_name = "OP_LAYOUTGET",
3141 .op_rsize_bop = nfsd4_layoutget_rsize,
3143 [OP_LAYOUTCOMMIT] = {
3144 .op_func = nfsd4_layoutcommit,
3145 .op_flags = OP_MODIFIES_SOMETHING,
3146 .op_name = "OP_LAYOUTCOMMIT",
3147 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3149 [OP_LAYOUTRETURN] = {
3150 .op_func = nfsd4_layoutreturn,
3151 .op_flags = OP_MODIFIES_SOMETHING,
3152 .op_name = "OP_LAYOUTRETURN",
3153 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3155 #endif /* CONFIG_NFSD_PNFS */
3157 /* NFSv4.2 operations */
3159 .op_func = nfsd4_allocate,
3160 .op_flags = OP_MODIFIES_SOMETHING,
3161 .op_name = "OP_ALLOCATE",
3162 .op_rsize_bop = nfsd4_only_status_rsize,
3165 .op_func = nfsd4_deallocate,
3166 .op_flags = OP_MODIFIES_SOMETHING,
3167 .op_name = "OP_DEALLOCATE",
3168 .op_rsize_bop = nfsd4_only_status_rsize,
3171 .op_func = nfsd4_clone,
3172 .op_flags = OP_MODIFIES_SOMETHING,
3173 .op_name = "OP_CLONE",
3174 .op_rsize_bop = nfsd4_only_status_rsize,
3177 .op_func = nfsd4_copy,
3178 .op_flags = OP_MODIFIES_SOMETHING,
3179 .op_name = "OP_COPY",
3180 .op_rsize_bop = nfsd4_copy_rsize,
3183 .op_func = nfsd4_read,
3184 .op_release = nfsd4_read_release,
3185 .op_name = "OP_READ_PLUS",
3186 .op_rsize_bop = nfsd4_read_plus_rsize,
3187 .op_get_currentstateid = nfsd4_get_readstateid,
3190 .op_func = nfsd4_seek,
3191 .op_name = "OP_SEEK",
3192 .op_rsize_bop = nfsd4_seek_rsize,
3194 [OP_OFFLOAD_STATUS] = {
3195 .op_func = nfsd4_offload_status,
3196 .op_name = "OP_OFFLOAD_STATUS",
3197 .op_rsize_bop = nfsd4_offload_status_rsize,
3199 [OP_OFFLOAD_CANCEL] = {
3200 .op_func = nfsd4_offload_cancel,
3201 .op_flags = OP_MODIFIES_SOMETHING,
3202 .op_name = "OP_OFFLOAD_CANCEL",
3203 .op_rsize_bop = nfsd4_only_status_rsize,
3205 [OP_COPY_NOTIFY] = {
3206 .op_func = nfsd4_copy_notify,
3207 .op_flags = OP_MODIFIES_SOMETHING,
3208 .op_name = "OP_COPY_NOTIFY",
3209 .op_rsize_bop = nfsd4_copy_notify_rsize,
3212 .op_func = nfsd4_getxattr,
3213 .op_name = "OP_GETXATTR",
3214 .op_rsize_bop = nfsd4_getxattr_rsize,
3217 .op_func = nfsd4_setxattr,
3218 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3219 .op_name = "OP_SETXATTR",
3220 .op_rsize_bop = nfsd4_setxattr_rsize,
3223 .op_func = nfsd4_listxattrs,
3224 .op_name = "OP_LISTXATTRS",
3225 .op_rsize_bop = nfsd4_listxattrs_rsize,
3227 [OP_REMOVEXATTR] = {
3228 .op_func = nfsd4_removexattr,
3229 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3230 .op_name = "OP_REMOVEXATTR",
3231 .op_rsize_bop = nfsd4_removexattr_rsize,
3236 * nfsd4_spo_must_allow - Determine if the compound op contains an
3237 * operation that is allowed to be sent with machine credentials
3239 * @rqstp: a pointer to the struct svc_rqst
3241 * Checks to see if the compound contains a spo_must_allow op
3242 * and confirms that it was sent with the proper machine creds.
3245 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3247 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3248 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3249 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3250 struct nfsd4_compound_state *cstate = &resp->cstate;
3251 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3254 if (!cstate->minorversion)
3257 if (cstate->spo_must_allowed)
3260 opiter = resp->opcnt;
3261 while (opiter < argp->opcnt) {
3262 this = &argp->ops[opiter++];
3263 if (test_bit(this->opnum, allow->u.longs) &&
3264 cstate->clp->cl_mach_cred &&
3265 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3266 cstate->spo_must_allowed = true;
3270 cstate->spo_must_allowed = false;
3274 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3276 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3277 return op_encode_hdr_size * sizeof(__be32);
3279 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3280 return OPDESC(op)->op_rsize_bop(rqstp, op);
3283 void warn_on_nonidempotent_op(struct nfsd4_op *op)
3285 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3286 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
3287 op->opnum, nfsd4_op_name(op->opnum));
3292 static const char *nfsd4_op_name(unsigned opnum)
3294 if (opnum < ARRAY_SIZE(nfsd4_ops))
3295 return nfsd4_ops[opnum].op_name;
3296 return "unknown_operation";
3299 static const struct svc_procedure nfsd_procedures4[2] = {
3301 .pc_func = nfsd4_proc_null,
3302 .pc_decode = nfssvc_decode_voidarg,
3303 .pc_encode = nfssvc_encode_voidres,
3304 .pc_argsize = sizeof(struct nfsd_voidargs),
3305 .pc_ressize = sizeof(struct nfsd_voidres),
3306 .pc_cachetype = RC_NOCACHE,
3309 [NFSPROC4_COMPOUND] = {
3310 .pc_func = nfsd4_proc_compound,
3311 .pc_decode = nfs4svc_decode_compoundargs,
3312 .pc_encode = nfs4svc_encode_compoundres,
3313 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3314 .pc_ressize = sizeof(struct nfsd4_compoundres),
3315 .pc_release = nfsd4_release_compoundargs,
3316 .pc_cachetype = RC_NOCACHE,
3317 .pc_xdrressize = NFSD_BUFSIZE/4,
3321 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3322 const struct svc_version nfsd_version4 = {
3325 .vs_proc = nfsd_procedures4,
3326 .vs_count = nfsd_count3,
3327 .vs_dispatch = nfsd_dispatch,
3328 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3329 .vs_rpcb_optnl = true,
3330 .vs_need_cong_ctrl = true,