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_2_INTER_SSC
59 static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
60 module_param(nfsd4_ssc_umount_timeout, int, 0644);
61 MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
62 "idle msecs before unmount export from source server");
65 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
66 #include <linux/security.h>
69 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
71 struct inode *inode = d_inode(resfh->fh_dentry);
75 status = security_inode_setsecctx(resfh->fh_dentry,
76 label->data, label->len);
81 * XXX: We should really fail the whole open, but we may
82 * already have created a new file, so it may be too
83 * late. For now this seems the least of evils:
85 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
91 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
95 #define NFSDDBG_FACILITY NFSDDBG_PROC
97 static u32 nfsd_attrmask[] = {
98 NFSD_WRITEABLE_ATTRS_WORD0,
99 NFSD_WRITEABLE_ATTRS_WORD1,
100 NFSD_WRITEABLE_ATTRS_WORD2
103 static u32 nfsd41_ex_attrmask[] = {
104 NFSD_SUPPATTR_EXCLCREAT_WORD0,
105 NFSD_SUPPATTR_EXCLCREAT_WORD1,
106 NFSD_SUPPATTR_EXCLCREAT_WORD2
110 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
111 u32 *bmval, u32 *writable)
113 struct dentry *dentry = cstate->current_fh.fh_dentry;
114 struct svc_export *exp = cstate->current_fh.fh_export;
116 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
117 return nfserr_attrnotsupp;
118 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
119 return nfserr_attrnotsupp;
120 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
121 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
122 return nfserr_attrnotsupp;
123 if (writable && !bmval_is_subset(bmval, writable))
125 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
126 (bmval[1] & FATTR4_WORD1_MODE))
132 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
133 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
135 __be32 status = nfs_ok;
137 if (open->op_create == NFS4_OPEN_CREATE) {
138 if (open->op_createmode == NFS4_CREATE_UNCHECKED
139 || open->op_createmode == NFS4_CREATE_GUARDED)
140 status = check_attr_support(rqstp, cstate,
141 open->op_bmval, nfsd_attrmask);
142 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
143 status = check_attr_support(rqstp, cstate,
144 open->op_bmval, nfsd41_ex_attrmask);
151 is_create_with_attrs(struct nfsd4_open *open)
153 return open->op_create == NFS4_OPEN_CREATE
154 && (open->op_createmode == NFS4_CREATE_UNCHECKED
155 || open->op_createmode == NFS4_CREATE_GUARDED
156 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
160 * if error occurs when setting the acl, just clear the acl bit
161 * in the returned attr bitmap.
164 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
165 struct nfs4_acl *acl, u32 *bmval)
169 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
172 * We should probably fail the whole open at this point,
173 * but we've already created the file, so it's too late;
174 * So this seems the least of evils:
176 bmval[0] &= ~FATTR4_WORD0_ACL;
180 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
183 dget(src->fh_dentry);
185 exp_get(src->fh_export);
190 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
194 if (open->op_truncate &&
195 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
198 accmode |= NFSD_MAY_READ_IF_EXEC;
200 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
201 accmode |= NFSD_MAY_READ;
202 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
203 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
204 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
205 accmode |= NFSD_MAY_WRITE;
207 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
212 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
214 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
221 * Using err_symlink as our catch-all case may look odd; but
222 * there's no other obvious error for this case in 4.0, and we
223 * happen to know that it will cause the linux v4 client to do
224 * the right thing on attempts to open something other than a
227 return nfserr_symlink;
230 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
232 if (nfsd4_has_session(cstate))
234 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
239 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
241 struct svc_fh *current_fh = &cstate->current_fh;
245 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
247 return nfserr_jukebox;
248 fh_init(*resfh, NFS4_FHSIZE);
249 open->op_truncate = false;
251 if (open->op_create) {
252 /* FIXME: check session persistence and pnfs flags.
253 * The nfsv4.1 spec requires the following semantics:
255 * Persistent | pNFS | Server REQUIRED | Client Allowed
256 * Reply Cache | server | |
257 * -------------+--------+-----------------+--------------------
258 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
260 * | | and EXCLUSIVE4 | or EXCLUSIVE4
262 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
263 * yes | no | GUARDED4 | GUARDED4
264 * yes | yes | GUARDED4 | GUARDED4
268 * Note: create modes (UNCHECKED,GUARDED...) are the same
269 * in NFSv4 as in v3 except EXCLUSIVE4_1.
271 current->fs->umask = open->op_umask;
272 status = do_nfsd_create(rqstp, current_fh, open->op_fname,
273 open->op_fnamelen, &open->op_iattr,
274 *resfh, open->op_createmode,
275 (u32 *)open->op_verf.data,
276 &open->op_truncate, &open->op_created);
277 current->fs->umask = 0;
279 if (!status && open->op_label.len)
280 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
283 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
284 * use the returned bitmask to indicate which attributes
285 * we used to store the verifier:
287 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
288 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
289 FATTR4_WORD1_TIME_MODIFY);
292 * Note this may exit with the parent still locked.
293 * We will hold the lock until nfsd4_open's final
294 * lookup, to prevent renames or unlinks until we've had
295 * a chance to an acquire a delegation if appropriate.
297 status = nfsd_lookup(rqstp, current_fh,
298 open->op_fname, open->op_fnamelen, *resfh);
301 status = nfsd_check_obj_isreg(*resfh);
305 if (is_create_with_attrs(open) && open->op_acl != NULL)
306 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
308 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
309 accmode = NFSD_MAY_NOP;
310 if (open->op_created ||
311 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
312 accmode |= NFSD_MAY_OWNER_OVERRIDE;
313 status = do_open_permission(rqstp, *resfh, open, accmode);
314 set_change_info(&open->op_cinfo, current_fh);
320 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
322 struct svc_fh *current_fh = &cstate->current_fh;
326 /* We don't know the target directory, and therefore can not
327 * set the change info
330 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
332 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
334 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
335 (open->op_iattr.ia_size == 0);
337 * In the delegation case, the client is telling us about an
338 * open that it *already* performed locally, some time ago. We
339 * should let it succeed now if possible.
341 * In the case of a CLAIM_FH open, on the other hand, the client
342 * may be counting on us to enforce permissions (the Linux 4.1
343 * client uses this for normal opens, for example).
345 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
346 accmode = NFSD_MAY_OWNER_OVERRIDE;
348 status = do_open_permission(rqstp, current_fh, open, accmode);
354 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
356 struct nfsd4_sessionid *sid =
357 (struct nfsd4_sessionid *)session->se_sessionid.data;
359 clid->cl_boot = sid->clientid.cl_boot;
360 clid->cl_id = sid->clientid.cl_id;
364 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
367 struct nfsd4_open *open = &u->open;
369 struct svc_fh *resfh = NULL;
370 struct net *net = SVC_NET(rqstp);
371 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
372 bool reclaim = false;
374 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
375 (int)open->op_fnamelen, open->op_fname,
378 /* This check required by spec. */
379 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
382 open->op_created = false;
385 * Before RECLAIM_COMPLETE done, server should deny new lock
387 if (nfsd4_has_session(cstate) &&
388 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
389 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
392 if (nfsd4_has_session(cstate))
393 copy_clientid(&open->op_clientid, cstate->session);
395 /* check seqid for replay. set nfs4_owner */
396 status = nfsd4_process_open1(cstate, open, nn);
397 if (status == nfserr_replay_me) {
398 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
399 fh_put(&cstate->current_fh);
400 fh_copy_shallow(&cstate->current_fh.fh_handle,
402 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
404 dprintk("nfsd4_open: replay failed"
405 " restoring previous filehandle\n");
407 status = nfserr_replay_me;
411 if (open->op_xdr_error) {
412 status = open->op_xdr_error;
416 status = nfsd4_check_open_attributes(rqstp, cstate, open);
420 /* Openowner is now set, so sequence id will get bumped. Now we need
421 * these checks before we do any creates: */
422 status = nfserr_grace;
423 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
425 status = nfserr_no_grace;
426 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
429 switch (open->op_claim_type) {
430 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
431 case NFS4_OPEN_CLAIM_NULL:
432 status = do_open_lookup(rqstp, cstate, open, &resfh);
436 case NFS4_OPEN_CLAIM_PREVIOUS:
437 status = nfs4_check_open_reclaim(cstate->clp);
440 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
443 case NFS4_OPEN_CLAIM_FH:
444 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
445 status = do_open_fhandle(rqstp, cstate, open);
448 resfh = &cstate->current_fh;
450 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
451 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
452 dprintk("NFSD: unsupported OPEN claim type %d\n",
453 open->op_claim_type);
454 status = nfserr_notsupp;
457 dprintk("NFSD: Invalid OPEN claim type %d\n",
458 open->op_claim_type);
459 status = nfserr_inval;
463 * nfsd4_process_open2() does the actual opening of the file. If
464 * successful, it (1) truncates the file if open->op_truncate was
465 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
467 status = nfsd4_process_open2(rqstp, resfh, open);
468 WARN(status && open->op_created,
469 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
470 be32_to_cpu(status));
471 if (reclaim && !status)
472 nn->somebody_reclaimed = true;
474 if (resfh && resfh != &cstate->current_fh) {
475 fh_dup2(&cstate->current_fh, resfh);
479 nfsd4_cleanup_open_state(cstate, open);
480 nfsd4_bump_seqid(cstate, status);
485 * OPEN is the only seqid-mutating operation whose decoding can fail
486 * with a seqid-mutating error (specifically, decoding of user names in
487 * the attributes). Therefore we have to do some processing to look up
488 * the stateowner so that we can bump the seqid.
490 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
492 struct nfsd4_open *open = &op->u.open;
494 if (!seqid_mutating_err(ntohl(op->status)))
496 if (nfsd4_has_session(cstate))
498 open->op_xdr_error = op->status;
499 return nfsd4_open(rqstp, cstate, &op->u);
503 * filehandle-manipulating ops.
506 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
509 u->getfh = &cstate->current_fh;
514 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
517 struct nfsd4_putfh *putfh = &u->putfh;
520 fh_put(&cstate->current_fh);
521 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
522 memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval,
524 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
525 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
526 if (ret == nfserr_stale && putfh->no_verify) {
527 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
535 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
540 fh_put(&cstate->current_fh);
541 status = exp_pseudoroot(rqstp, &cstate->current_fh);
546 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
549 if (!cstate->save_fh.fh_dentry)
550 return nfserr_restorefh;
552 fh_dup2(&cstate->current_fh, &cstate->save_fh);
553 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
554 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
555 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
561 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
564 fh_dup2(&cstate->save_fh, &cstate->current_fh);
565 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
566 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
567 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
576 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
579 struct nfsd4_access *access = &u->access;
582 access_full = NFS3_ACCESS_FULL;
583 if (cstate->minorversion >= 2)
584 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
587 if (access->ac_req_access & ~access_full)
590 access->ac_resp_access = access->ac_req_access;
591 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
592 &access->ac_supported);
595 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
597 __be32 *verf = (__be32 *)verifier->data;
599 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
601 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
605 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
608 struct nfsd4_commit *commit = &u->commit;
610 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
612 (__be32 *)commit->co_verf.data);
616 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
619 struct nfsd4_create *create = &u->create;
624 fh_init(&resfh, NFS4_FHSIZE);
626 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
630 status = check_attr_support(rqstp, cstate, create->cr_bmval,
635 current->fs->umask = create->cr_umask;
636 switch (create->cr_type) {
638 status = nfsd_symlink(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 create->cr_data, &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_IFBLK, rdev, &resfh);
655 status = nfserr_inval;
656 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
657 if (MAJOR(rdev) != create->cr_specdata1 ||
658 MINOR(rdev) != create->cr_specdata2)
660 status = nfsd_create(rqstp, &cstate->current_fh,
661 create->cr_name, create->cr_namelen,
662 &create->cr_iattr,S_IFCHR, rdev, &resfh);
666 status = nfsd_create(rqstp, &cstate->current_fh,
667 create->cr_name, create->cr_namelen,
668 &create->cr_iattr, S_IFSOCK, 0, &resfh);
672 status = nfsd_create(rqstp, &cstate->current_fh,
673 create->cr_name, create->cr_namelen,
674 &create->cr_iattr, S_IFIFO, 0, &resfh);
678 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
679 status = nfsd_create(rqstp, &cstate->current_fh,
680 create->cr_name, create->cr_namelen,
681 &create->cr_iattr, S_IFDIR, 0, &resfh);
685 status = nfserr_badtype;
691 if (create->cr_label.len)
692 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
694 if (create->cr_acl != NULL)
695 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
698 fh_unlock(&cstate->current_fh);
699 set_change_info(&create->cr_cinfo, &cstate->current_fh);
700 fh_dup2(&cstate->current_fh, &resfh);
704 current->fs->umask = 0;
709 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
712 struct nfsd4_getattr *getattr = &u->getattr;
715 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
719 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
722 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
723 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
724 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
726 getattr->ga_fhp = &cstate->current_fh;
731 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
734 struct nfsd4_link *link = &u->link;
737 status = nfsd_link(rqstp, &cstate->current_fh,
738 link->li_name, link->li_namelen, &cstate->save_fh);
740 set_change_info(&link->li_cinfo, &cstate->current_fh);
744 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
746 struct svc_fh tmp_fh;
749 fh_init(&tmp_fh, NFS4_FHSIZE);
750 ret = exp_pseudoroot(rqstp, &tmp_fh);
753 if (tmp_fh.fh_dentry == fh->fh_dentry) {
758 return nfsd_lookup(rqstp, fh, "..", 2, fh);
762 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
765 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
769 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
772 return nfsd_lookup(rqstp, &cstate->current_fh,
773 u->lookup.lo_name, u->lookup.lo_len,
774 &cstate->current_fh);
778 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
781 struct nfsd4_read *read = &u->read;
785 if (read->rd_offset >= OFFSET_MAX)
788 trace_nfsd_read_start(rqstp, &cstate->current_fh,
789 read->rd_offset, read->rd_length);
792 * If we do a zero copy read, then a client will see read data
793 * that reflects the state of the file *after* performing the
794 * following compound.
796 * To ensure proper ordering, we therefore turn off zero copy if
797 * the client wants us to do more in this compound:
799 if (!nfsd4_last_compound_op(rqstp))
800 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
803 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
804 &read->rd_stateid, RD_STATE,
807 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
812 read->rd_rqstp = rqstp;
813 read->rd_fhp = &cstate->current_fh;
819 nfsd4_read_release(union nfsd4_op_u *u)
822 nfsd_file_put(u->read.rd_nf);
823 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
824 u->read.rd_offset, u->read.rd_length);
828 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
831 struct nfsd4_readdir *readdir = &u->readdir;
832 u64 cookie = readdir->rd_cookie;
833 static const nfs4_verifier zeroverf;
835 /* no need to check permission - this will be done in nfsd_readdir() */
837 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
840 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
841 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
842 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
844 if ((cookie == 1) || (cookie == 2) ||
845 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
846 return nfserr_bad_cookie;
848 readdir->rd_rqstp = rqstp;
849 readdir->rd_fhp = &cstate->current_fh;
854 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
857 u->readlink.rl_rqstp = rqstp;
858 u->readlink.rl_fhp = &cstate->current_fh;
863 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
866 struct nfsd4_remove *remove = &u->remove;
869 if (opens_in_grace(SVC_NET(rqstp)))
871 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
872 remove->rm_name, remove->rm_namelen);
874 fh_unlock(&cstate->current_fh);
875 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
881 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
884 struct nfsd4_rename *rename = &u->rename;
887 if (opens_in_grace(SVC_NET(rqstp)))
889 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
890 rename->rn_snamelen, &cstate->current_fh,
891 rename->rn_tname, rename->rn_tnamelen);
894 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
895 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
900 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
903 struct nfsd4_secinfo *secinfo = &u->secinfo;
904 struct svc_export *exp;
905 struct dentry *dentry;
908 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
911 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
912 secinfo->si_name, secinfo->si_namelen,
916 fh_unlock(&cstate->current_fh);
917 if (d_really_is_negative(dentry)) {
921 secinfo->si_exp = exp;
923 if (cstate->minorversion)
924 /* See rfc 5661 section 2.6.3.1.1.8 */
925 fh_put(&cstate->current_fh);
930 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
935 switch (u->secinfo_no_name.sin_style) {
936 case NFS4_SECINFO_STYLE4_CURRENT_FH:
938 case NFS4_SECINFO_STYLE4_PARENT:
939 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
947 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
948 fh_put(&cstate->current_fh);
953 nfsd4_secinfo_release(union nfsd4_op_u *u)
955 if (u->secinfo.si_exp)
956 exp_put(u->secinfo.si_exp);
960 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
962 if (u->secinfo_no_name.sin_exp)
963 exp_put(u->secinfo_no_name.sin_exp);
967 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
970 struct nfsd4_setattr *setattr = &u->setattr;
971 __be32 status = nfs_ok;
974 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
975 status = nfs4_preprocess_stateid_op(rqstp, cstate,
976 &cstate->current_fh, &setattr->sa_stateid,
977 WR_STATE, NULL, NULL);
979 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
983 err = fh_want_write(&cstate->current_fh);
985 return nfserrno(err);
988 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
993 if (setattr->sa_acl != NULL)
994 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
998 if (setattr->sa_label.len)
999 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
1000 &setattr->sa_label);
1003 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1006 fh_drop_write(&cstate->current_fh);
1011 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1012 union nfsd4_op_u *u)
1014 struct nfsd4_write *write = &u->write;
1015 stateid_t *stateid = &write->wr_stateid;
1016 struct nfsd_file *nf = NULL;
1017 __be32 status = nfs_ok;
1021 if (write->wr_offset >= OFFSET_MAX)
1022 return nfserr_inval;
1024 cnt = write->wr_buflen;
1025 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1026 write->wr_offset, cnt);
1027 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1028 stateid, WR_STATE, &nf, NULL);
1030 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1034 write->wr_how_written = write->wr_stable_how;
1036 nvecs = svc_fill_write_vector(rqstp, &write->wr_payload);
1037 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1039 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
1040 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1041 write->wr_how_written,
1042 (__be32 *)write->wr_verifier.data);
1045 write->wr_bytes_written = cnt;
1046 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1047 write->wr_offset, cnt);
1052 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1053 stateid_t *src_stateid, struct nfsd_file **src,
1054 stateid_t *dst_stateid, struct nfsd_file **dst)
1058 if (!cstate->save_fh.fh_dentry)
1059 return nfserr_nofilehandle;
1061 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1062 src_stateid, RD_STATE, src, NULL);
1064 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1068 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1069 dst_stateid, WR_STATE, dst, NULL);
1071 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1075 /* fix up for NFS-specific error code */
1076 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1077 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
1078 status = nfserr_wrong_type;
1085 nfsd_file_put(*dst);
1087 nfsd_file_put(*src);
1092 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1093 union nfsd4_op_u *u)
1095 struct nfsd4_clone *clone = &u->clone;
1096 struct nfsd_file *src, *dst;
1099 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1100 &clone->cl_dst_stateid, &dst);
1104 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1105 dst, clone->cl_dst_pos, clone->cl_count,
1106 EX_ISSYNC(cstate->current_fh.fh_export));
1114 void nfs4_put_copy(struct nfsd4_copy *copy)
1116 if (!refcount_dec_and_test(©->refcount))
1122 check_and_set_stop_copy(struct nfsd4_copy *copy)
1126 spin_lock(©->cp_clp->async_lock);
1127 value = copy->stopped;
1129 copy->stopped = true;
1130 spin_unlock(©->cp_clp->async_lock);
1134 static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1136 /* only 1 thread should stop the copy */
1137 if (!check_and_set_stop_copy(copy))
1138 kthread_stop(copy->copy_task);
1139 nfs4_put_copy(copy);
1142 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1144 struct nfsd4_copy *copy = NULL;
1146 spin_lock(&clp->async_lock);
1147 if (!list_empty(&clp->async_copies)) {
1148 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1150 refcount_inc(©->refcount);
1152 spin_unlock(&clp->async_lock);
1156 void nfsd4_shutdown_copy(struct nfs4_client *clp)
1158 struct nfsd4_copy *copy;
1160 while ((copy = nfsd4_get_copy(clp)) != NULL)
1161 nfsd4_stop_copy(copy);
1163 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
1165 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1166 struct nfs_fh *src_fh,
1167 nfs4_stateid *stateid);
1168 extern void nfs42_ssc_close(struct file *filep);
1170 extern void nfs_sb_deactive(struct super_block *sb);
1172 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1175 * setup a work entry in the ssc delayed unmount list.
1177 static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
1178 struct nfsd4_ssc_umount_item **retwork, struct vfsmount **ss_mnt)
1180 struct nfsd4_ssc_umount_item *ni = NULL;
1181 struct nfsd4_ssc_umount_item *work = NULL;
1182 struct nfsd4_ssc_umount_item *tmp;
1187 work = kzalloc(sizeof(*work), GFP_KERNEL);
1189 spin_lock(&nn->nfsd_ssc_lock);
1190 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1191 if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
1194 if (ni->nsui_busy) {
1195 /* wait - and try again */
1196 prepare_to_wait(&nn->nfsd_ssc_waitq, &wait,
1197 TASK_INTERRUPTIBLE);
1198 spin_unlock(&nn->nfsd_ssc_lock);
1200 /* allow 20secs for mount/unmount for now - revisit */
1201 if (signal_pending(current) ||
1202 (schedule_timeout(20*HZ) == 0)) {
1204 return nfserr_eagain;
1206 finish_wait(&nn->nfsd_ssc_waitq, &wait);
1209 *ss_mnt = ni->nsui_vfsmount;
1210 refcount_inc(&ni->nsui_refcnt);
1211 spin_unlock(&nn->nfsd_ssc_lock);
1214 /* return vfsmount in ss_mnt */
1218 strncpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr));
1219 refcount_set(&work->nsui_refcnt, 2);
1220 work->nsui_busy = true;
1221 list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
1224 spin_unlock(&nn->nfsd_ssc_lock);
1228 static void nfsd4_ssc_update_dul_work(struct nfsd_net *nn,
1229 struct nfsd4_ssc_umount_item *work, struct vfsmount *ss_mnt)
1231 /* set nsui_vfsmount, clear busy flag and wakeup waiters */
1232 spin_lock(&nn->nfsd_ssc_lock);
1233 work->nsui_vfsmount = ss_mnt;
1234 work->nsui_busy = false;
1235 wake_up_all(&nn->nfsd_ssc_waitq);
1236 spin_unlock(&nn->nfsd_ssc_lock);
1239 static void nfsd4_ssc_cancel_dul_work(struct nfsd_net *nn,
1240 struct nfsd4_ssc_umount_item *work)
1242 spin_lock(&nn->nfsd_ssc_lock);
1243 list_del(&work->nsui_list);
1244 wake_up_all(&nn->nfsd_ssc_waitq);
1245 spin_unlock(&nn->nfsd_ssc_lock);
1250 * Support one copy source server for now.
1253 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1254 struct vfsmount **mount)
1256 struct file_system_type *type;
1257 struct vfsmount *ss_mnt;
1258 struct nfs42_netaddr *naddr;
1259 struct sockaddr_storage tmp_addr;
1260 size_t tmp_addrlen, match_netid_len = 3;
1261 char *startsep = "", *endsep = "", *match_netid = "tcp";
1262 char *ipaddr, *dev_name, *raw_data;
1264 __be32 status = nfserr_inval;
1265 struct nfsd4_ssc_umount_item *work = NULL;
1266 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1268 naddr = &nss->u.nl4_addr;
1269 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1271 (struct sockaddr *)&tmp_addr,
1273 if (tmp_addrlen == 0)
1276 if (tmp_addr.ss_family == AF_INET6) {
1279 match_netid = "tcp6";
1280 match_netid_len = 4;
1283 if (naddr->netid_len != match_netid_len ||
1284 strncmp(naddr->netid, match_netid, naddr->netid_len))
1287 /* Construct the raw data for the vfs_kern_mount call */
1288 len = RPC_MAX_ADDRBUFLEN + 1;
1289 ipaddr = kzalloc(len, GFP_KERNEL);
1293 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1295 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1297 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1298 raw_data = kzalloc(raw_len, GFP_KERNEL);
1300 goto out_free_ipaddr;
1302 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1304 status = nfserr_nodev;
1305 type = get_fs_type("nfs");
1307 goto out_free_rawdata;
1309 /* Set the server:<export> for the vfs_kern_mount call */
1310 dev_name = kzalloc(len + 5, GFP_KERNEL);
1312 goto out_free_rawdata;
1313 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1315 status = nfsd4_ssc_setup_dul(nn, ipaddr, &work, &ss_mnt);
1317 goto out_free_devname;
1321 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1322 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1323 module_put(type->owner);
1324 if (IS_ERR(ss_mnt)) {
1325 status = nfserr_nodev;
1327 nfsd4_ssc_cancel_dul_work(nn, work);
1328 goto out_free_devname;
1331 nfsd4_ssc_update_dul_work(nn, work, ss_mnt);
1347 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1349 nfs_do_sb_deactive(ss_mnt->mnt_sb);
1354 * Verify COPY destination stateid.
1356 * Connect to the source server with NFSv4.1.
1357 * Create the source struct file for nfsd_copy_range.
1358 * Called with COPY cstate:
1359 * SAVED_FH: source filehandle
1360 * CURRENT_FH: destination filehandle
1363 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1364 struct nfsd4_compound_state *cstate,
1365 struct nfsd4_copy *copy, struct vfsmount **mount)
1367 struct svc_fh *s_fh = NULL;
1368 stateid_t *s_stid = ©->cp_src_stateid;
1369 __be32 status = nfserr_inval;
1371 /* Verify the destination stateid and set dst struct file*/
1372 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1373 ©->cp_dst_stateid,
1374 WR_STATE, ©->nf_dst, NULL);
1378 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
1382 s_fh = &cstate->save_fh;
1384 copy->c_fh.size = s_fh->fh_handle.fh_size;
1385 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
1386 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
1387 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1388 sizeof(stateid_opaque_t));
1396 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1397 struct nfsd_file *dst)
1401 struct nfsd4_ssc_umount_item *tmp;
1402 struct nfsd4_ssc_umount_item *ni = NULL;
1403 struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
1405 nfs42_ssc_close(src->nf_file);
1413 spin_lock(&nn->nfsd_ssc_lock);
1414 timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
1415 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
1416 if (ni->nsui_vfsmount->mnt_sb == ss_mnt->mnt_sb) {
1417 list_del(&ni->nsui_list);
1419 * vfsmount can be shared by multiple exports,
1420 * decrement refcnt. If the count drops to 1 it
1421 * will be unmounted when nsui_expire expires.
1423 refcount_dec(&ni->nsui_refcnt);
1424 ni->nsui_expire = jiffies + timeout;
1425 list_add_tail(&ni->nsui_list, &nn->nfsd_ssc_mount_list);
1430 spin_unlock(&nn->nfsd_ssc_lock);
1437 #else /* CONFIG_NFSD_V4_2_INTER_SSC */
1440 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1441 struct nfsd4_compound_state *cstate,
1442 struct nfsd4_copy *copy,
1443 struct vfsmount **mount)
1446 return nfserr_inval;
1450 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1451 struct nfsd_file *dst)
1456 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1460 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1461 struct nfs_fh *src_fh,
1462 nfs4_stateid *stateid)
1466 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1469 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1470 struct nfsd4_compound_state *cstate,
1471 struct nfsd4_copy *copy)
1473 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid,
1474 ©->nf_src, ©->cp_dst_stateid,
1479 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1485 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1487 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1489 nfs4_put_copy(copy);
1492 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1493 struct rpc_task *task)
1498 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1499 .release = nfsd4_cb_offload_release,
1500 .done = nfsd4_cb_offload_done
1503 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1505 copy->cp_res.wr_stable_how =
1506 copy->committed ? NFS_FILE_SYNC : NFS_UNSTABLE;
1507 copy->cp_synchronous = sync;
1508 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
1511 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1513 ssize_t bytes_copied = 0;
1514 u64 bytes_total = copy->cp_count;
1515 u64 src_pos = copy->cp_src_pos;
1516 u64 dst_pos = copy->cp_dst_pos;
1519 /* See RFC 7862 p.67: */
1520 if (bytes_total == 0)
1521 bytes_total = ULLONG_MAX;
1523 if (kthread_should_stop())
1525 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1526 src_pos, copy->nf_dst->nf_file, dst_pos,
1528 if (bytes_copied <= 0)
1530 bytes_total -= bytes_copied;
1531 copy->cp_res.wr_bytes_written += bytes_copied;
1532 src_pos += bytes_copied;
1533 dst_pos += bytes_copied;
1534 } while (bytes_total > 0 && !copy->cp_synchronous);
1535 /* for a non-zero asynchronous copy do a commit of data */
1536 if (!copy->cp_synchronous && copy->cp_res.wr_bytes_written > 0) {
1537 down_write(©->nf_dst->nf_rwsem);
1538 status = vfs_fsync_range(copy->nf_dst->nf_file,
1540 copy->cp_res.wr_bytes_written, 0);
1541 up_write(©->nf_dst->nf_rwsem);
1543 copy->committed = true;
1545 return bytes_copied;
1548 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1553 bytes = _nfsd_copy_file_range(copy);
1554 /* for async copy, we ignore the error, client can always retry
1557 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1558 status = nfserrno(bytes);
1560 nfsd4_init_copy_res(copy, sync);
1564 if (!copy->cp_intra) /* Inter server SSC */
1565 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1568 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1573 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1575 dst->cp_src_pos = src->cp_src_pos;
1576 dst->cp_dst_pos = src->cp_dst_pos;
1577 dst->cp_count = src->cp_count;
1578 dst->cp_synchronous = src->cp_synchronous;
1579 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1580 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1581 dst->cp_clp = src->cp_clp;
1582 dst->nf_dst = nfsd_file_get(src->nf_dst);
1583 dst->cp_intra = src->cp_intra;
1584 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1585 dst->nf_src = nfsd_file_get(src->nf_src);
1587 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1588 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1589 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1590 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1591 dst->ss_mnt = src->ss_mnt;
1594 static void cleanup_async_copy(struct nfsd4_copy *copy)
1596 nfs4_free_copy_state(copy);
1597 nfsd_file_put(copy->nf_dst);
1599 nfsd_file_put(copy->nf_src);
1600 spin_lock(©->cp_clp->async_lock);
1601 list_del(©->copies);
1602 spin_unlock(©->cp_clp->async_lock);
1603 nfs4_put_copy(copy);
1606 static int nfsd4_do_async_copy(void *data)
1608 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1609 struct nfsd4_copy *cb_copy;
1611 if (!copy->cp_intra) { /* Inter server SSC */
1612 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1613 if (!copy->nf_src) {
1614 copy->nfserr = nfserr_serverfault;
1615 nfsd4_interssc_disconnect(copy->ss_mnt);
1618 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
1620 if (IS_ERR(copy->nf_src->nf_file)) {
1621 copy->nfserr = nfserr_offload_denied;
1622 nfsd4_interssc_disconnect(copy->ss_mnt);
1627 copy->nfserr = nfsd4_do_copy(copy, 0);
1629 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1632 refcount_set(&cb_copy->refcount, 1);
1633 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
1634 cb_copy->cp_clp = copy->cp_clp;
1635 cb_copy->nfserr = copy->nfserr;
1636 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
1637 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1638 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1639 trace_nfsd_cb_offload(copy->cp_clp, ©->cp_res.cb_stateid,
1640 ©->fh, copy->cp_count, copy->nfserr);
1641 nfsd4_run_cb(&cb_copy->cp_cb);
1643 if (!copy->cp_intra)
1644 kfree(copy->nf_src);
1645 cleanup_async_copy(copy);
1650 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1651 union nfsd4_op_u *u)
1653 struct nfsd4_copy *copy = &u->copy;
1655 struct nfsd4_copy *async_copy = NULL;
1657 if (!copy->cp_intra) { /* Inter server SSC */
1658 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1659 status = nfserr_notsupp;
1662 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1665 return nfserr_offload_denied;
1667 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1672 copy->cp_clp = cstate->clp;
1673 memcpy(©->fh, &cstate->current_fh.fh_handle,
1674 sizeof(struct knfsd_fh));
1675 if (!copy->cp_synchronous) {
1676 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1678 status = nfserrno(-ENOMEM);
1679 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1682 if (!nfs4_init_copy_state(nn, copy))
1684 refcount_set(&async_copy->refcount, 1);
1685 memcpy(©->cp_res.cb_stateid, ©->cp_stateid.stid,
1686 sizeof(copy->cp_res.cb_stateid));
1687 dup_copy_fields(copy, async_copy);
1688 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1689 async_copy, "%s", "copy thread");
1690 if (IS_ERR(async_copy->copy_task))
1692 spin_lock(&async_copy->cp_clp->async_lock);
1693 list_add(&async_copy->copies,
1694 &async_copy->cp_clp->async_copies);
1695 spin_unlock(&async_copy->cp_clp->async_lock);
1696 wake_up_process(async_copy->copy_task);
1699 status = nfsd4_do_copy(copy, 1);
1705 cleanup_async_copy(async_copy);
1706 status = nfserrno(-ENOMEM);
1707 if (!copy->cp_intra)
1708 nfsd4_interssc_disconnect(copy->ss_mnt);
1713 find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1715 struct nfsd4_copy *copy;
1717 spin_lock(&clp->async_lock);
1718 list_for_each_entry(copy, &clp->async_copies, copies) {
1719 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
1721 refcount_inc(©->refcount);
1722 spin_unlock(&clp->async_lock);
1725 spin_unlock(&clp->async_lock);
1730 nfsd4_offload_cancel(struct svc_rqst *rqstp,
1731 struct nfsd4_compound_state *cstate,
1732 union nfsd4_op_u *u)
1734 struct nfsd4_offload_status *os = &u->offload_status;
1735 struct nfsd4_copy *copy;
1736 struct nfs4_client *clp = cstate->clp;
1738 copy = find_async_copy(clp, &os->stateid);
1740 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1742 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1744 nfsd4_stop_copy(copy);
1750 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1751 union nfsd4_op_u *u)
1753 struct nfsd4_copy_notify *cn = &u->copy_notify;
1755 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1756 struct nfs4_stid *stid;
1757 struct nfs4_cpntf_state *cps;
1758 struct nfs4_client *clp = cstate->clp;
1760 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1761 &cn->cpn_src_stateid, RD_STATE, NULL,
1766 cn->cpn_sec = nn->nfsd4_lease;
1769 status = nfserrno(-ENOMEM);
1770 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1773 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1774 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1775 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1777 /* For now, only return one server address in cpn_src, the
1778 * address used by the client to connect to this server.
1780 cn->cpn_src.nl4_type = NL4_NETADDR;
1781 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1782 &cn->cpn_src.u.nl4_addr);
1783 WARN_ON_ONCE(status);
1785 nfs4_put_cpntf_state(nn, cps);
1789 nfs4_put_stid(stid);
1794 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1795 struct nfsd4_fallocate *fallocate, int flags)
1798 struct nfsd_file *nf;
1800 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1801 &fallocate->falloc_stateid,
1802 WR_STATE, &nf, NULL);
1803 if (status != nfs_ok) {
1804 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1808 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
1809 fallocate->falloc_offset,
1810 fallocate->falloc_length,
1816 nfsd4_offload_status(struct svc_rqst *rqstp,
1817 struct nfsd4_compound_state *cstate,
1818 union nfsd4_op_u *u)
1820 struct nfsd4_offload_status *os = &u->offload_status;
1822 struct nfsd4_copy *copy;
1823 struct nfs4_client *clp = cstate->clp;
1825 copy = find_async_copy(clp, &os->stateid);
1827 os->count = copy->cp_res.wr_bytes_written;
1828 nfs4_put_copy(copy);
1830 status = nfserr_bad_stateid;
1836 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1837 union nfsd4_op_u *u)
1839 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1843 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1844 union nfsd4_op_u *u)
1846 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1847 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1851 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1852 union nfsd4_op_u *u)
1854 struct nfsd4_seek *seek = &u->seek;
1857 struct nfsd_file *nf;
1859 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1860 &seek->seek_stateid,
1861 RD_STATE, &nf, NULL);
1863 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1867 switch (seek->seek_whence) {
1868 case NFS4_CONTENT_DATA:
1871 case NFS4_CONTENT_HOLE:
1875 status = nfserr_union_notsupp;
1880 * Note: This call does change file->f_pos, but nothing in NFSD
1881 * should ever file->f_pos.
1883 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
1884 if (seek->seek_pos < 0)
1885 status = nfserrno(seek->seek_pos);
1886 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
1887 seek->seek_eof = true;
1894 /* This routine never returns NFS_OK! If there are no other errors, it
1895 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1896 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1897 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1900 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1901 struct nfsd4_verify *verify)
1907 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1911 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1915 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1916 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1917 return nfserr_inval;
1918 if (verify->ve_attrlen & 3)
1919 return nfserr_inval;
1922 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1924 count = 4 + (verify->ve_attrlen >> 2);
1925 buf = kmalloc(count << 2, GFP_KERNEL);
1927 return nfserr_jukebox;
1930 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1931 cstate->current_fh.fh_export,
1932 cstate->current_fh.fh_dentry,
1936 * If nfsd4_encode_fattr() ran out of space, assume that's because
1937 * the attributes are longer (hence different) than those given:
1939 if (status == nfserr_resource)
1940 status = nfserr_not_same;
1945 p = buf + 1 + ntohl(buf[0]);
1946 status = nfserr_not_same;
1947 if (ntohl(*p++) != verify->ve_attrlen)
1949 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1950 status = nfserr_same;
1958 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1959 union nfsd4_op_u *u)
1963 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1964 return status == nfserr_not_same ? nfs_ok : status;
1968 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1969 union nfsd4_op_u *u)
1973 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1974 return status == nfserr_same ? nfs_ok : status;
1977 #ifdef CONFIG_NFSD_PNFS
1978 static const struct nfsd4_layout_ops *
1979 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1981 if (!exp->ex_layout_types) {
1982 dprintk("%s: export does not support pNFS\n", __func__);
1986 if (layout_type >= LAYOUT_TYPE_MAX ||
1987 !(exp->ex_layout_types & (1 << layout_type))) {
1988 dprintk("%s: layout type %d not supported\n",
1989 __func__, layout_type);
1993 return nfsd4_layout_ops[layout_type];
1997 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1998 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2000 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
2001 const struct nfsd4_layout_ops *ops;
2002 struct nfsd4_deviceid_map *map;
2003 struct svc_export *exp;
2006 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
2008 gdp->gd_layout_type,
2009 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
2012 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
2014 dprintk("%s: couldn't find device ID to export mapping!\n",
2016 return nfserr_noent;
2019 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
2021 dprintk("%s: could not find device id\n", __func__);
2022 return nfserr_noent;
2025 nfserr = nfserr_layoutunavailable;
2026 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
2031 if (gdp->gd_maxcount != 0) {
2032 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
2033 rqstp, cstate->clp, gdp);
2036 gdp->gd_notify_types &= ops->notify_types;
2043 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
2045 kfree(u->getdeviceinfo.gd_device);
2049 nfsd4_layoutget(struct svc_rqst *rqstp,
2050 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2052 struct nfsd4_layoutget *lgp = &u->layoutget;
2053 struct svc_fh *current_fh = &cstate->current_fh;
2054 const struct nfsd4_layout_ops *ops;
2055 struct nfs4_layout_stateid *ls;
2057 int accmode = NFSD_MAY_READ_IF_EXEC;
2059 switch (lgp->lg_seg.iomode) {
2061 accmode |= NFSD_MAY_READ;
2064 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
2067 dprintk("%s: invalid iomode %d\n",
2068 __func__, lgp->lg_seg.iomode);
2069 nfserr = nfserr_badiomode;
2073 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
2077 nfserr = nfserr_layoutunavailable;
2078 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
2083 * Verify minlength and range as per RFC5661:
2084 * o If loga_length is less than loga_minlength,
2085 * the metadata server MUST return NFS4ERR_INVAL.
2086 * o If the sum of loga_offset and loga_minlength exceeds
2087 * NFS4_UINT64_MAX, and loga_minlength is not
2088 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
2089 * o If the sum of loga_offset and loga_length exceeds
2090 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
2091 * the error NFS4ERR_INVAL MUST result.
2093 nfserr = nfserr_inval;
2094 if (lgp->lg_seg.length < lgp->lg_minlength ||
2095 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
2096 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
2097 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
2098 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
2100 if (lgp->lg_seg.length == 0)
2103 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
2104 true, lgp->lg_layout_type, &ls);
2106 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
2110 nfserr = nfserr_recallconflict;
2111 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
2114 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
2119 nfserr = nfsd4_insert_layout(lgp, ls);
2122 mutex_unlock(&ls->ls_mutex);
2123 nfs4_put_stid(&ls->ls_stid);
2129 nfsd4_layoutget_release(union nfsd4_op_u *u)
2131 kfree(u->layoutget.lg_content);
2135 nfsd4_layoutcommit(struct svc_rqst *rqstp,
2136 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2138 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
2139 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
2140 struct svc_fh *current_fh = &cstate->current_fh;
2141 const struct nfsd4_layout_ops *ops;
2142 loff_t new_size = lcp->lc_last_wr + 1;
2143 struct inode *inode;
2144 struct nfs4_layout_stateid *ls;
2147 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2151 nfserr = nfserr_layoutunavailable;
2152 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2155 inode = d_inode(current_fh->fh_dentry);
2157 nfserr = nfserr_inval;
2158 if (new_size <= seg->offset) {
2159 dprintk("pnfsd: last write before layout segment\n");
2162 if (new_size > seg->offset + seg->length) {
2163 dprintk("pnfsd: last write beyond layout segment\n");
2166 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2167 dprintk("pnfsd: layoutcommit beyond EOF\n");
2171 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2172 false, lcp->lc_layout_type,
2175 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
2176 /* fixup error code as per RFC5661 */
2177 if (nfserr == nfserr_bad_stateid)
2178 nfserr = nfserr_badlayout;
2182 /* LAYOUTCOMMIT does not require any serialization */
2183 mutex_unlock(&ls->ls_mutex);
2185 if (new_size > i_size_read(inode)) {
2186 lcp->lc_size_chg = 1;
2187 lcp->lc_newsize = new_size;
2189 lcp->lc_size_chg = 0;
2192 nfserr = ops->proc_layoutcommit(inode, lcp);
2193 nfs4_put_stid(&ls->ls_stid);
2199 nfsd4_layoutreturn(struct svc_rqst *rqstp,
2200 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2202 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
2203 struct svc_fh *current_fh = &cstate->current_fh;
2206 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2210 nfserr = nfserr_layoutunavailable;
2211 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2214 switch (lrp->lr_seg.iomode) {
2220 dprintk("%s: invalid iomode %d\n", __func__,
2221 lrp->lr_seg.iomode);
2222 nfserr = nfserr_inval;
2226 switch (lrp->lr_return_type) {
2228 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2232 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2235 dprintk("%s: invalid return_type %d\n", __func__,
2236 lrp->lr_return_type);
2237 nfserr = nfserr_inval;
2243 #endif /* CONFIG_NFSD_PNFS */
2246 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2247 union nfsd4_op_u *u)
2249 struct nfsd4_getxattr *getxattr = &u->getxattr;
2251 return nfsd_getxattr(rqstp, &cstate->current_fh,
2252 getxattr->getxa_name, &getxattr->getxa_buf,
2253 &getxattr->getxa_len);
2257 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2258 union nfsd4_op_u *u)
2260 struct nfsd4_setxattr *setxattr = &u->setxattr;
2263 if (opens_in_grace(SVC_NET(rqstp)))
2264 return nfserr_grace;
2266 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2267 setxattr->setxa_buf, setxattr->setxa_len,
2268 setxattr->setxa_flags);
2271 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2277 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2278 union nfsd4_op_u *u)
2281 * Get the entire list, then copy out only the user attributes
2282 * in the encode function.
2284 return nfsd_listxattr(rqstp, &cstate->current_fh,
2285 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2289 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2290 union nfsd4_op_u *u)
2292 struct nfsd4_removexattr *removexattr = &u->removexattr;
2295 if (opens_in_grace(SVC_NET(rqstp)))
2296 return nfserr_grace;
2298 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2299 removexattr->rmxa_name);
2302 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2311 nfsd4_proc_null(struct svc_rqst *rqstp)
2316 static inline void nfsd4_increment_op_stats(u32 opnum)
2318 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2319 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
2322 static const struct nfsd4_operation nfsd4_ops[];
2324 static const char *nfsd4_op_name(unsigned opnum);
2327 * Enforce NFSv4.1 COMPOUND ordering rules:
2329 * Also note, enforced elsewhere:
2330 * - SEQUENCE other than as first op results in
2331 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
2332 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2333 * (Enforced in nfsd4_bind_conn_to_session().)
2334 * - DESTROY_SESSION must be the final operation in a compound, if
2335 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2336 * (Enforced in nfsd4_destroy_session().)
2338 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
2340 struct nfsd4_op *first_op = &args->ops[0];
2342 /* These ordering requirements don't apply to NFSv4.0: */
2343 if (args->minorversion == 0)
2345 /* This is weird, but OK, not our problem: */
2346 if (args->opcnt == 0)
2348 if (first_op->status == nfserr_op_illegal)
2350 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
2351 return nfserr_op_not_in_session;
2352 if (first_op->opnum == OP_SEQUENCE)
2355 * So first_op is something allowed outside a session, like
2356 * EXCHANGE_ID; but then it has to be the only op in the
2359 if (args->opcnt != 1)
2360 return nfserr_not_only_op;
2364 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
2366 return &nfsd4_ops[op->opnum];
2369 bool nfsd4_cache_this_op(struct nfsd4_op *op)
2371 if (op->opnum == OP_ILLEGAL)
2373 return OPDESC(op)->op_flags & OP_CACHEME;
2376 static bool need_wrongsec_check(struct svc_rqst *rqstp)
2378 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2379 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2380 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2381 struct nfsd4_op *next = &argp->ops[resp->opcnt];
2382 const struct nfsd4_operation *thisd = OPDESC(this);
2383 const struct nfsd4_operation *nextd;
2386 * Most ops check wronsec on our own; only the putfh-like ops
2387 * have special rules.
2389 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2392 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2393 * put-filehandle operation if we're not going to use the
2396 if (argp->opcnt == resp->opcnt)
2398 if (next->opnum == OP_ILLEGAL)
2400 nextd = OPDESC(next);
2402 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2403 * errors themselves as necessary; others should check for them
2406 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2409 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
2411 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2413 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2414 struct nfsd4_copy *copy;
2415 struct nfsd4_putfh *putfh;
2418 /* traverse all operation and if it's a COPY compound, mark the
2419 * source filehandle to skip verification
2421 for (i = 0; i < args->opcnt; i++) {
2423 if (op->opnum == OP_PUTFH)
2425 else if (op->opnum == OP_SAVEFH)
2426 saved_op = current_op;
2427 else if (op->opnum == OP_RESTOREFH)
2428 current_op = saved_op;
2429 else if (op->opnum == OP_COPY) {
2430 copy = (struct nfsd4_copy *)&op->u;
2432 op->status = nfserr_nofilehandle;
2435 putfh = (struct nfsd4_putfh *)&saved_op->u;
2436 if (!copy->cp_intra)
2437 putfh->no_verify = true;
2443 check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2452 nfsd4_proc_compound(struct svc_rqst *rqstp)
2454 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2455 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2456 struct nfsd4_op *op;
2457 struct nfsd4_compound_state *cstate = &resp->cstate;
2458 struct svc_fh *current_fh = &cstate->current_fh;
2459 struct svc_fh *save_fh = &cstate->save_fh;
2460 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2463 resp->xdr = &rqstp->rq_res_stream;
2464 resp->statusp = resp->xdr->p;
2466 /* reserve space for: NFS status code */
2467 xdr_reserve_space(resp->xdr, XDR_UNIT);
2469 /* reserve space for: taglen, tag, and opcnt */
2470 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
2471 resp->taglen = args->taglen;
2472 resp->tag = args->tag;
2473 resp->rqstp = rqstp;
2474 cstate->minorversion = args->minorversion;
2475 fh_init(current_fh, NFS4_FHSIZE);
2476 fh_init(save_fh, NFS4_FHSIZE);
2478 * Don't use the deferral mechanism for NFSv4; compounds make it
2479 * too hard to avoid non-idempotency problems.
2481 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2484 * According to RFC3010, this takes precedence over all other errors.
2486 status = nfserr_minor_vers_mismatch;
2487 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
2489 status = nfserr_resource;
2490 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2493 status = nfs41_check_op_ordering(args);
2496 op->status = status;
2500 check_if_stalefh_allowed(args);
2502 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2504 trace_nfsd_compound(rqstp, args->opcnt);
2505 while (!status && resp->opcnt < args->opcnt) {
2506 op = &args->ops[resp->opcnt++];
2509 * The XDR decode routines may have pre-set op->status;
2510 * for example, if there is a miscellaneous XDR error
2511 * it will be set to nfserr_bad_xdr.
2514 if (op->opnum == OP_OPEN)
2515 op->status = nfsd4_open_omfg(rqstp, cstate, op);
2518 if (!current_fh->fh_dentry &&
2519 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
2520 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
2521 op->status = nfserr_nofilehandle;
2524 } else if (current_fh->fh_export &&
2525 current_fh->fh_export->ex_fslocs.migrated &&
2526 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
2527 op->status = nfserr_moved;
2531 fh_clear_wcc(current_fh);
2533 /* If op is non-idempotent */
2534 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
2536 * Don't execute this op if we couldn't encode a
2539 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
2541 * Plus if there's another operation, make sure
2542 * we'll have space to at least encode an error:
2544 if (resp->opcnt < args->opcnt)
2545 plen += COMPOUND_ERR_SLACK_SPACE;
2546 op->status = nfsd4_check_resp_size(resp, plen);
2552 if (op->opdesc->op_get_currentstateid)
2553 op->opdesc->op_get_currentstateid(cstate, &op->u);
2554 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
2556 /* Only from SEQUENCE */
2557 if (cstate->status == nfserr_replay_cache) {
2558 dprintk("%s NFS4.1 replay from cache\n", __func__);
2559 status = op->status;
2563 if (op->opdesc->op_set_currentstateid)
2564 op->opdesc->op_set_currentstateid(cstate, &op->u);
2566 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
2567 clear_current_stateid(cstate);
2569 if (current_fh->fh_export &&
2570 need_wrongsec_check(rqstp))
2571 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
2574 if (op->status == nfserr_replay_me) {
2575 op->replay = &cstate->replay_owner->so_replay;
2576 nfsd4_encode_replay(resp->xdr, op);
2577 status = op->status = op->replay->rp_status;
2579 nfsd4_encode_operation(resp, op);
2580 status = op->status;
2583 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2584 nfsd4_op_name(op->opnum));
2586 nfsd4_cstate_clear_replay(cstate);
2587 nfsd4_increment_op_stats(op->opnum);
2592 BUG_ON(cstate->replay_owner);
2594 cstate->status = status;
2595 /* Reset deferral mechanism for RPC deferrals */
2596 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
2600 #define op_encode_hdr_size (2)
2601 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2602 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2603 #define op_encode_change_info_maxsz (5)
2604 #define nfs4_fattr_bitmap_maxsz (4)
2606 /* We'll fall back on returning no lockowner if run out of space: */
2607 #define op_encode_lockowner_maxsz (0)
2608 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2610 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2612 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2613 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2614 op_encode_ace_maxsz)
2616 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2618 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2620 return (op_encode_hdr_size) * sizeof(__be32);
2623 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2625 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2628 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2630 /* ac_supported, ac_resp_access */
2631 return (op_encode_hdr_size + 2)* sizeof(__be32);
2634 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2636 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2639 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2641 return (op_encode_hdr_size + op_encode_change_info_maxsz
2642 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2646 * Note since this is an idempotent operation we won't insist on failing
2647 * the op prematurely if the estimate is too large. We may turn off splice
2648 * reads unnecessarily.
2650 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2651 struct nfsd4_op *op)
2653 u32 *bmap = op->u.getattr.ga_bmval;
2654 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2657 if (bmap0 & FATTR4_WORD0_ACL)
2658 return svc_max_payload(rqstp);
2659 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2660 return svc_max_payload(rqstp);
2662 if (bmap1 & FATTR4_WORD1_OWNER) {
2663 ret += IDMAP_NAMESZ + 4;
2664 bmap1 &= ~FATTR4_WORD1_OWNER;
2666 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2667 ret += IDMAP_NAMESZ + 4;
2668 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2670 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2671 ret += NFS4_FHSIZE + 4;
2672 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2674 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
2675 ret += NFS4_MAXLABELLEN + 12;
2676 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2679 * Largest of remaining attributes are 16 bytes (e.g.,
2680 * supported_attributes)
2682 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2683 /* bitmask, length */
2688 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2690 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2693 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2695 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2699 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2701 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2705 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2707 return (op_encode_hdr_size + op_encode_stateid_maxsz
2708 + op_encode_change_info_maxsz + 1
2709 + nfs4_fattr_bitmap_maxsz
2710 + op_encode_delegation_maxsz) * sizeof(__be32);
2713 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2715 u32 maxcount = 0, rlen = 0;
2717 maxcount = svc_max_payload(rqstp);
2718 rlen = min(op->u.read.rd_length, maxcount);
2720 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2723 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2725 u32 maxcount = svc_max_payload(rqstp);
2726 u32 rlen = min(op->u.read.rd_length, maxcount);
2728 * If we detect that the file changed during hole encoding, then we
2729 * recover by encoding the remaining reply as data. This means we need
2730 * to set aside enough room to encode two data segments.
2732 u32 seg_len = 2 * (1 + 2 + 1);
2734 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2737 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2739 u32 maxcount = 0, rlen = 0;
2741 maxcount = svc_max_payload(rqstp);
2742 rlen = min(op->u.readdir.rd_maxcount, maxcount);
2744 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2745 XDR_QUADLEN(rlen)) * sizeof(__be32);
2748 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2750 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2753 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2755 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2759 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2761 return (op_encode_hdr_size + op_encode_change_info_maxsz
2762 + op_encode_change_info_maxsz) * sizeof(__be32);
2765 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2766 struct nfsd4_op *op)
2768 return (op_encode_hdr_size
2769 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
2772 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2774 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2778 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2780 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2783 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2785 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2786 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2789 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2791 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2795 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2797 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2800 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2802 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2803 1 + 1 + /* eir_flags, spr_how */\
2804 4 + /* spo_must_enforce & _allow with bitmap */\
2805 2 + /*eir_server_owner.so_minor_id */\
2806 /* eir_server_owner.so_major_id<> */\
2807 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2808 /* eir_server_scope<> */\
2809 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2810 1 + /* eir_server_impl_id array length */\
2811 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2814 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2816 return (op_encode_hdr_size + \
2817 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2818 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2821 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2823 return (op_encode_hdr_size + \
2824 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2825 2 + /* csr_sequence, csr_flags */\
2826 op_encode_channel_attrs_maxsz + \
2827 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2830 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2832 return (op_encode_hdr_size +
2833 1 /* wr_callback */ +
2834 op_encode_stateid_maxsz /* wr_callback */ +
2836 1 /* wr_committed */ +
2837 op_encode_verifier_maxsz +
2838 1 /* cr_consecutive */ +
2839 1 /* cr_synchronous */) * sizeof(__be32);
2842 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2843 struct nfsd4_op *op)
2845 return (op_encode_hdr_size +
2847 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2850 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2851 struct nfsd4_op *op)
2853 return (op_encode_hdr_size +
2854 3 /* cnr_lease_time */ +
2855 1 /* We support one cnr_source_server */ +
2856 1 /* cnr_stateid seq */ +
2857 op_encode_stateid_maxsz /* cnr_stateid */ +
2858 1 /* num cnr_source_server*/ +
2861 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2865 #ifdef CONFIG_NFSD_PNFS
2866 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2868 u32 maxcount = 0, rlen = 0;
2870 maxcount = svc_max_payload(rqstp);
2871 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2873 return (op_encode_hdr_size +
2874 1 /* gd_layout_type*/ +
2876 2 /* gd_notify_types */) * sizeof(__be32);
2880 * At this stage we don't really know what layout driver will handle the request,
2881 * so we need to define an arbitrary upper bound here.
2883 #define MAX_LAYOUT_SIZE 128
2884 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2886 return (op_encode_hdr_size +
2887 1 /* logr_return_on_close */ +
2888 op_encode_stateid_maxsz +
2889 1 /* nr of layouts */ +
2890 MAX_LAYOUT_SIZE) * sizeof(__be32);
2893 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2895 return (op_encode_hdr_size +
2896 1 /* locr_newsize */ +
2897 2 /* ns_size */) * sizeof(__be32);
2900 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2902 return (op_encode_hdr_size +
2903 1 /* lrs_stateid */ +
2904 op_encode_stateid_maxsz) * sizeof(__be32);
2906 #endif /* CONFIG_NFSD_PNFS */
2909 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2911 return (op_encode_hdr_size + 3) * sizeof(__be32);
2914 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2915 struct nfsd4_op *op)
2919 maxcount = svc_max_payload(rqstp);
2920 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2922 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2925 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2926 struct nfsd4_op *op)
2928 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2931 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2932 struct nfsd4_op *op)
2936 maxcount = svc_max_payload(rqstp);
2937 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2939 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2942 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2943 struct nfsd4_op *op)
2945 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2950 static const struct nfsd4_operation nfsd4_ops[] = {
2952 .op_func = nfsd4_access,
2953 .op_name = "OP_ACCESS",
2954 .op_rsize_bop = nfsd4_access_rsize,
2957 .op_func = nfsd4_close,
2958 .op_flags = OP_MODIFIES_SOMETHING,
2959 .op_name = "OP_CLOSE",
2960 .op_rsize_bop = nfsd4_status_stateid_rsize,
2961 .op_get_currentstateid = nfsd4_get_closestateid,
2962 .op_set_currentstateid = nfsd4_set_closestateid,
2965 .op_func = nfsd4_commit,
2966 .op_flags = OP_MODIFIES_SOMETHING,
2967 .op_name = "OP_COMMIT",
2968 .op_rsize_bop = nfsd4_commit_rsize,
2971 .op_func = nfsd4_create,
2972 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2973 .op_name = "OP_CREATE",
2974 .op_rsize_bop = nfsd4_create_rsize,
2976 [OP_DELEGRETURN] = {
2977 .op_func = nfsd4_delegreturn,
2978 .op_flags = OP_MODIFIES_SOMETHING,
2979 .op_name = "OP_DELEGRETURN",
2980 .op_rsize_bop = nfsd4_only_status_rsize,
2981 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2984 .op_func = nfsd4_getattr,
2985 .op_flags = ALLOWED_ON_ABSENT_FS,
2986 .op_rsize_bop = nfsd4_getattr_rsize,
2987 .op_name = "OP_GETATTR",
2990 .op_func = nfsd4_getfh,
2991 .op_name = "OP_GETFH",
2992 .op_rsize_bop = nfsd4_getfh_rsize,
2995 .op_func = nfsd4_link,
2996 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2998 .op_name = "OP_LINK",
2999 .op_rsize_bop = nfsd4_link_rsize,
3002 .op_func = nfsd4_lock,
3003 .op_flags = OP_MODIFIES_SOMETHING |
3004 OP_NONTRIVIAL_ERROR_ENCODE,
3005 .op_name = "OP_LOCK",
3006 .op_rsize_bop = nfsd4_lock_rsize,
3007 .op_set_currentstateid = nfsd4_set_lockstateid,
3010 .op_func = nfsd4_lockt,
3011 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
3012 .op_name = "OP_LOCKT",
3013 .op_rsize_bop = nfsd4_lock_rsize,
3016 .op_func = nfsd4_locku,
3017 .op_flags = OP_MODIFIES_SOMETHING,
3018 .op_name = "OP_LOCKU",
3019 .op_rsize_bop = nfsd4_status_stateid_rsize,
3020 .op_get_currentstateid = nfsd4_get_lockustateid,
3023 .op_func = nfsd4_lookup,
3024 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3025 .op_name = "OP_LOOKUP",
3026 .op_rsize_bop = nfsd4_only_status_rsize,
3029 .op_func = nfsd4_lookupp,
3030 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
3031 .op_name = "OP_LOOKUPP",
3032 .op_rsize_bop = nfsd4_only_status_rsize,
3035 .op_func = nfsd4_nverify,
3036 .op_name = "OP_NVERIFY",
3037 .op_rsize_bop = nfsd4_only_status_rsize,
3040 .op_func = nfsd4_open,
3041 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3042 .op_name = "OP_OPEN",
3043 .op_rsize_bop = nfsd4_open_rsize,
3044 .op_set_currentstateid = nfsd4_set_openstateid,
3046 [OP_OPEN_CONFIRM] = {
3047 .op_func = nfsd4_open_confirm,
3048 .op_flags = OP_MODIFIES_SOMETHING,
3049 .op_name = "OP_OPEN_CONFIRM",
3050 .op_rsize_bop = nfsd4_status_stateid_rsize,
3052 [OP_OPEN_DOWNGRADE] = {
3053 .op_func = nfsd4_open_downgrade,
3054 .op_flags = OP_MODIFIES_SOMETHING,
3055 .op_name = "OP_OPEN_DOWNGRADE",
3056 .op_rsize_bop = nfsd4_status_stateid_rsize,
3057 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
3058 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
3061 .op_func = nfsd4_putfh,
3062 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3063 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3064 .op_name = "OP_PUTFH",
3065 .op_rsize_bop = nfsd4_only_status_rsize,
3068 .op_func = nfsd4_putrootfh,
3069 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3070 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3071 .op_name = "OP_PUTPUBFH",
3072 .op_rsize_bop = nfsd4_only_status_rsize,
3075 .op_func = nfsd4_putrootfh,
3076 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3077 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
3078 .op_name = "OP_PUTROOTFH",
3079 .op_rsize_bop = nfsd4_only_status_rsize,
3082 .op_func = nfsd4_read,
3083 .op_release = nfsd4_read_release,
3084 .op_name = "OP_READ",
3085 .op_rsize_bop = nfsd4_read_rsize,
3086 .op_get_currentstateid = nfsd4_get_readstateid,
3089 .op_func = nfsd4_readdir,
3090 .op_name = "OP_READDIR",
3091 .op_rsize_bop = nfsd4_readdir_rsize,
3094 .op_func = nfsd4_readlink,
3095 .op_name = "OP_READLINK",
3096 .op_rsize_bop = nfsd4_readlink_rsize,
3099 .op_func = nfsd4_remove,
3100 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3101 .op_name = "OP_REMOVE",
3102 .op_rsize_bop = nfsd4_remove_rsize,
3105 .op_func = nfsd4_rename,
3106 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3107 .op_name = "OP_RENAME",
3108 .op_rsize_bop = nfsd4_rename_rsize,
3111 .op_func = nfsd4_renew,
3112 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3113 | OP_MODIFIES_SOMETHING,
3114 .op_name = "OP_RENEW",
3115 .op_rsize_bop = nfsd4_only_status_rsize,
3119 .op_func = nfsd4_restorefh,
3120 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3121 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
3122 .op_name = "OP_RESTOREFH",
3123 .op_rsize_bop = nfsd4_only_status_rsize,
3126 .op_func = nfsd4_savefh,
3127 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
3128 .op_name = "OP_SAVEFH",
3129 .op_rsize_bop = nfsd4_only_status_rsize,
3132 .op_func = nfsd4_secinfo,
3133 .op_release = nfsd4_secinfo_release,
3134 .op_flags = OP_HANDLES_WRONGSEC,
3135 .op_name = "OP_SECINFO",
3136 .op_rsize_bop = nfsd4_secinfo_rsize,
3139 .op_func = nfsd4_setattr,
3140 .op_name = "OP_SETATTR",
3141 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
3142 | OP_NONTRIVIAL_ERROR_ENCODE,
3143 .op_rsize_bop = nfsd4_setattr_rsize,
3144 .op_get_currentstateid = nfsd4_get_setattrstateid,
3146 [OP_SETCLIENTID] = {
3147 .op_func = nfsd4_setclientid,
3148 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3149 | OP_MODIFIES_SOMETHING | OP_CACHEME
3150 | OP_NONTRIVIAL_ERROR_ENCODE,
3151 .op_name = "OP_SETCLIENTID",
3152 .op_rsize_bop = nfsd4_setclientid_rsize,
3154 [OP_SETCLIENTID_CONFIRM] = {
3155 .op_func = nfsd4_setclientid_confirm,
3156 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3157 | OP_MODIFIES_SOMETHING | OP_CACHEME,
3158 .op_name = "OP_SETCLIENTID_CONFIRM",
3159 .op_rsize_bop = nfsd4_only_status_rsize,
3162 .op_func = nfsd4_verify,
3163 .op_name = "OP_VERIFY",
3164 .op_rsize_bop = nfsd4_only_status_rsize,
3167 .op_func = nfsd4_write,
3168 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3169 .op_name = "OP_WRITE",
3170 .op_rsize_bop = nfsd4_write_rsize,
3171 .op_get_currentstateid = nfsd4_get_writestateid,
3173 [OP_RELEASE_LOCKOWNER] = {
3174 .op_func = nfsd4_release_lockowner,
3175 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3176 | OP_MODIFIES_SOMETHING,
3177 .op_name = "OP_RELEASE_LOCKOWNER",
3178 .op_rsize_bop = nfsd4_only_status_rsize,
3181 /* NFSv4.1 operations */
3182 [OP_EXCHANGE_ID] = {
3183 .op_func = nfsd4_exchange_id,
3184 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3185 | OP_MODIFIES_SOMETHING,
3186 .op_name = "OP_EXCHANGE_ID",
3187 .op_rsize_bop = nfsd4_exchange_id_rsize,
3189 [OP_BACKCHANNEL_CTL] = {
3190 .op_func = nfsd4_backchannel_ctl,
3191 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3192 .op_name = "OP_BACKCHANNEL_CTL",
3193 .op_rsize_bop = nfsd4_only_status_rsize,
3195 [OP_BIND_CONN_TO_SESSION] = {
3196 .op_func = nfsd4_bind_conn_to_session,
3197 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3198 | OP_MODIFIES_SOMETHING,
3199 .op_name = "OP_BIND_CONN_TO_SESSION",
3200 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
3202 [OP_CREATE_SESSION] = {
3203 .op_func = nfsd4_create_session,
3204 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3205 | OP_MODIFIES_SOMETHING,
3206 .op_name = "OP_CREATE_SESSION",
3207 .op_rsize_bop = nfsd4_create_session_rsize,
3209 [OP_DESTROY_SESSION] = {
3210 .op_func = nfsd4_destroy_session,
3211 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3212 | OP_MODIFIES_SOMETHING,
3213 .op_name = "OP_DESTROY_SESSION",
3214 .op_rsize_bop = nfsd4_only_status_rsize,
3217 .op_func = nfsd4_sequence,
3218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
3219 .op_name = "OP_SEQUENCE",
3220 .op_rsize_bop = nfsd4_sequence_rsize,
3222 [OP_DESTROY_CLIENTID] = {
3223 .op_func = nfsd4_destroy_clientid,
3224 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3225 | OP_MODIFIES_SOMETHING,
3226 .op_name = "OP_DESTROY_CLIENTID",
3227 .op_rsize_bop = nfsd4_only_status_rsize,
3229 [OP_RECLAIM_COMPLETE] = {
3230 .op_func = nfsd4_reclaim_complete,
3231 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3232 .op_name = "OP_RECLAIM_COMPLETE",
3233 .op_rsize_bop = nfsd4_only_status_rsize,
3235 [OP_SECINFO_NO_NAME] = {
3236 .op_func = nfsd4_secinfo_no_name,
3237 .op_release = nfsd4_secinfo_no_name_release,
3238 .op_flags = OP_HANDLES_WRONGSEC,
3239 .op_name = "OP_SECINFO_NO_NAME",
3240 .op_rsize_bop = nfsd4_secinfo_rsize,
3242 [OP_TEST_STATEID] = {
3243 .op_func = nfsd4_test_stateid,
3244 .op_flags = ALLOWED_WITHOUT_FH,
3245 .op_name = "OP_TEST_STATEID",
3246 .op_rsize_bop = nfsd4_test_stateid_rsize,
3248 [OP_FREE_STATEID] = {
3249 .op_func = nfsd4_free_stateid,
3250 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3251 .op_name = "OP_FREE_STATEID",
3252 .op_get_currentstateid = nfsd4_get_freestateid,
3253 .op_rsize_bop = nfsd4_only_status_rsize,
3255 #ifdef CONFIG_NFSD_PNFS
3256 [OP_GETDEVICEINFO] = {
3257 .op_func = nfsd4_getdeviceinfo,
3258 .op_release = nfsd4_getdeviceinfo_release,
3259 .op_flags = ALLOWED_WITHOUT_FH,
3260 .op_name = "OP_GETDEVICEINFO",
3261 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
3264 .op_func = nfsd4_layoutget,
3265 .op_release = nfsd4_layoutget_release,
3266 .op_flags = OP_MODIFIES_SOMETHING,
3267 .op_name = "OP_LAYOUTGET",
3268 .op_rsize_bop = nfsd4_layoutget_rsize,
3270 [OP_LAYOUTCOMMIT] = {
3271 .op_func = nfsd4_layoutcommit,
3272 .op_flags = OP_MODIFIES_SOMETHING,
3273 .op_name = "OP_LAYOUTCOMMIT",
3274 .op_rsize_bop = nfsd4_layoutcommit_rsize,
3276 [OP_LAYOUTRETURN] = {
3277 .op_func = nfsd4_layoutreturn,
3278 .op_flags = OP_MODIFIES_SOMETHING,
3279 .op_name = "OP_LAYOUTRETURN",
3280 .op_rsize_bop = nfsd4_layoutreturn_rsize,
3282 #endif /* CONFIG_NFSD_PNFS */
3284 /* NFSv4.2 operations */
3286 .op_func = nfsd4_allocate,
3287 .op_flags = OP_MODIFIES_SOMETHING,
3288 .op_name = "OP_ALLOCATE",
3289 .op_rsize_bop = nfsd4_only_status_rsize,
3292 .op_func = nfsd4_deallocate,
3293 .op_flags = OP_MODIFIES_SOMETHING,
3294 .op_name = "OP_DEALLOCATE",
3295 .op_rsize_bop = nfsd4_only_status_rsize,
3298 .op_func = nfsd4_clone,
3299 .op_flags = OP_MODIFIES_SOMETHING,
3300 .op_name = "OP_CLONE",
3301 .op_rsize_bop = nfsd4_only_status_rsize,
3304 .op_func = nfsd4_copy,
3305 .op_flags = OP_MODIFIES_SOMETHING,
3306 .op_name = "OP_COPY",
3307 .op_rsize_bop = nfsd4_copy_rsize,
3310 .op_func = nfsd4_read,
3311 .op_release = nfsd4_read_release,
3312 .op_name = "OP_READ_PLUS",
3313 .op_rsize_bop = nfsd4_read_plus_rsize,
3314 .op_get_currentstateid = nfsd4_get_readstateid,
3317 .op_func = nfsd4_seek,
3318 .op_name = "OP_SEEK",
3319 .op_rsize_bop = nfsd4_seek_rsize,
3321 [OP_OFFLOAD_STATUS] = {
3322 .op_func = nfsd4_offload_status,
3323 .op_name = "OP_OFFLOAD_STATUS",
3324 .op_rsize_bop = nfsd4_offload_status_rsize,
3326 [OP_OFFLOAD_CANCEL] = {
3327 .op_func = nfsd4_offload_cancel,
3328 .op_flags = OP_MODIFIES_SOMETHING,
3329 .op_name = "OP_OFFLOAD_CANCEL",
3330 .op_rsize_bop = nfsd4_only_status_rsize,
3332 [OP_COPY_NOTIFY] = {
3333 .op_func = nfsd4_copy_notify,
3334 .op_flags = OP_MODIFIES_SOMETHING,
3335 .op_name = "OP_COPY_NOTIFY",
3336 .op_rsize_bop = nfsd4_copy_notify_rsize,
3339 .op_func = nfsd4_getxattr,
3340 .op_name = "OP_GETXATTR",
3341 .op_rsize_bop = nfsd4_getxattr_rsize,
3344 .op_func = nfsd4_setxattr,
3345 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3346 .op_name = "OP_SETXATTR",
3347 .op_rsize_bop = nfsd4_setxattr_rsize,
3350 .op_func = nfsd4_listxattrs,
3351 .op_name = "OP_LISTXATTRS",
3352 .op_rsize_bop = nfsd4_listxattrs_rsize,
3354 [OP_REMOVEXATTR] = {
3355 .op_func = nfsd4_removexattr,
3356 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3357 .op_name = "OP_REMOVEXATTR",
3358 .op_rsize_bop = nfsd4_removexattr_rsize,
3363 * nfsd4_spo_must_allow - Determine if the compound op contains an
3364 * operation that is allowed to be sent with machine credentials
3366 * @rqstp: a pointer to the struct svc_rqst
3368 * Checks to see if the compound contains a spo_must_allow op
3369 * and confirms that it was sent with the proper machine creds.
3372 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3374 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3375 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3376 struct nfsd4_op *this;
3377 struct nfsd4_compound_state *cstate = &resp->cstate;
3378 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3381 if (!cstate->minorversion)
3384 if (cstate->spo_must_allowed)
3387 opiter = resp->opcnt;
3388 while (opiter < argp->opcnt) {
3389 this = &argp->ops[opiter++];
3390 if (test_bit(this->opnum, allow->u.longs) &&
3391 cstate->clp->cl_mach_cred &&
3392 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3393 cstate->spo_must_allowed = true;
3397 cstate->spo_must_allowed = false;
3401 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3403 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
3404 return op_encode_hdr_size * sizeof(__be32);
3406 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3407 return OPDESC(op)->op_rsize_bop(rqstp, op);
3410 void warn_on_nonidempotent_op(struct nfsd4_op *op)
3412 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3413 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
3414 op->opnum, nfsd4_op_name(op->opnum));
3419 static const char *nfsd4_op_name(unsigned opnum)
3421 if (opnum < ARRAY_SIZE(nfsd4_ops))
3422 return nfsd4_ops[opnum].op_name;
3423 return "unknown_operation";
3426 static const struct svc_procedure nfsd_procedures4[2] = {
3428 .pc_func = nfsd4_proc_null,
3429 .pc_decode = nfssvc_decode_voidarg,
3430 .pc_encode = nfssvc_encode_voidres,
3431 .pc_argsize = sizeof(struct nfsd_voidargs),
3432 .pc_ressize = sizeof(struct nfsd_voidres),
3433 .pc_cachetype = RC_NOCACHE,
3437 [NFSPROC4_COMPOUND] = {
3438 .pc_func = nfsd4_proc_compound,
3439 .pc_decode = nfs4svc_decode_compoundargs,
3440 .pc_encode = nfs4svc_encode_compoundres,
3441 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3442 .pc_ressize = sizeof(struct nfsd4_compoundres),
3443 .pc_release = nfsd4_release_compoundargs,
3444 .pc_cachetype = RC_NOCACHE,
3445 .pc_xdrressize = NFSD_BUFSIZE/4,
3446 .pc_name = "COMPOUND",
3450 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
3451 const struct svc_version nfsd_version4 = {
3454 .vs_proc = nfsd_procedures4,
3455 .vs_count = nfsd_count3,
3456 .vs_dispatch = nfsd_dispatch,
3457 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3458 .vs_rpcb_optnl = true,
3459 .vs_need_cong_ctrl = true,