4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lustre/mdt/mdt_idmap.c
36 * Author: Lai Siyao <lsy@clusterfs.com>
37 * Author: Fan Yong <fanyong@clusterfs.com>
40 #define DEBUG_SUBSYSTEM S_MDS
42 #ifndef AUTOCONF_INCLUDED
43 #include <linux/config.h>
45 #include <linux/module.h>
46 #include <linux/kernel.h>
48 #include <linux/kmod.h>
49 #include <linux/string.h>
50 #include <linux/stat.h>
51 #include <linux/errno.h>
52 #include <linux/version.h>
53 #include <linux/unistd.h>
54 #include <asm/system.h>
55 #include <asm/uaccess.h>
57 #include <linux/stat.h>
58 #include <asm/uaccess.h>
59 #include <linux/slab.h>
61 #include <libcfs/libcfs.h>
62 #include <libcfs/lucache.h>
64 #include <obd_class.h>
65 #include <obd_support.h>
66 #include <lustre_net.h>
67 #include <lustre_import.h>
68 #include <lustre_dlm.h>
69 #include <lustre_sec.h>
70 #include <lustre_lib.h>
72 #include "mdt_internal.h"
74 #define mdt_init_sec_none(reply, exp) \
76 reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT | \
77 OBD_CONNECT_RMT_CLIENT_FORCE | \
78 OBD_CONNECT_MDS_CAPA | \
79 OBD_CONNECT_OSS_CAPA); \
80 cfs_spin_lock(&exp->exp_lock); \
81 exp->exp_connect_flags = reply->ocd_connect_flags; \
82 cfs_spin_unlock(&exp->exp_lock); \
85 int mdt_init_sec_level(struct mdt_thread_info *info)
87 struct mdt_device *mdt = info->mti_mdt;
88 struct ptlrpc_request *req = mdt_info_req(info);
89 char *client = libcfs_nid2str(req->rq_peer.nid);
90 struct obd_export *exp = req->rq_export;
91 struct obd_device *obd = exp->exp_obd;
92 struct obd_connect_data *data, *reply;
96 data = req_capsule_client_get(info->mti_pill, &RMF_CONNECT_DATA);
97 reply = req_capsule_server_get(info->mti_pill, &RMF_CONNECT_DATA);
98 if (data == NULL || reply == NULL)
101 /* connection from MDT is always trusted */
102 if (req->rq_auth_usr_mdt) {
103 mdt_init_sec_none(reply, exp);
107 /* no GSS support case */
108 if (!req->rq_auth_gss) {
109 if (mdt->mdt_sec_level > LUSTRE_SEC_NONE) {
110 CWARN("client %s -> target %s does not user GSS, "
111 "can not run under security level %d.\n",
112 client, obd->obd_name, mdt->mdt_sec_level);
115 mdt_init_sec_none(reply, exp);
120 /* old version case */
121 if (unlikely(!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) ||
122 !(data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) ||
123 !(data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA))) {
124 if (mdt->mdt_sec_level > LUSTRE_SEC_NONE) {
125 CWARN("client %s -> target %s uses old version, "
126 "can not run under security level %d.\n",
127 client, obd->obd_name, mdt->mdt_sec_level);
130 CWARN("client %s -> target %s uses old version, "
131 "run under security level %d.\n",
132 client, obd->obd_name, mdt->mdt_sec_level);
133 mdt_init_sec_none(reply, exp);
138 remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT_FORCE;
140 if (!req->rq_auth_remote)
141 CDEBUG(D_SEC, "client (local realm) %s -> target %s "
142 "asked to be remote.\n", client, obd->obd_name);
143 } else if (req->rq_auth_remote) {
145 CDEBUG(D_SEC, "client (remote realm) %s -> target %s is set "
146 "as remote by default.\n", client, obd->obd_name);
150 if (!mdt->mdt_opts.mo_oss_capa) {
151 CDEBUG(D_SEC, "client %s -> target %s is set as remote,"
152 " but OSS capabilities are not enabled: %d.\n",
153 client, obd->obd_name, mdt->mdt_opts.mo_oss_capa);
157 if (req->rq_auth_uid == INVALID_UID) {
158 CDEBUG(D_SEC, "client %s -> target %s: user is not "
159 "authenticated!\n", client, obd->obd_name);
164 switch (mdt->mdt_sec_level) {
165 case LUSTRE_SEC_NONE:
167 mdt_init_sec_none(reply, exp);
170 CDEBUG(D_SEC, "client %s -> target %s is set as remote, "
171 "can not run under security level %d.\n",
172 client, obd->obd_name, mdt->mdt_sec_level);
175 case LUSTRE_SEC_REMOTE:
177 mdt_init_sec_none(reply, exp);
181 reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |
182 OBD_CONNECT_RMT_CLIENT_FORCE);
183 if (!mdt->mdt_opts.mo_mds_capa)
184 reply->ocd_connect_flags &= ~OBD_CONNECT_MDS_CAPA;
185 if (!mdt->mdt_opts.mo_oss_capa)
186 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
188 cfs_spin_lock(&exp->exp_lock);
189 exp->exp_connect_flags = reply->ocd_connect_flags;
190 cfs_spin_unlock(&exp->exp_lock);
200 int mdt_init_idmap(struct mdt_thread_info *info)
202 struct ptlrpc_request *req = mdt_info_req(info);
203 struct mdt_export_data *med = mdt_req2med(req);
204 struct obd_export *exp = req->rq_export;
205 char *client = libcfs_nid2str(req->rq_peer.nid);
206 struct obd_device *obd = exp->exp_obd;
210 if (exp_connect_rmtclient(exp)) {
211 cfs_mutex_lock(&med->med_idmap_mutex);
213 med->med_idmap = lustre_idmap_init();
214 cfs_mutex_unlock(&med->med_idmap_mutex);
216 if (IS_ERR(med->med_idmap)) {
217 long err = PTR_ERR(med->med_idmap);
219 med->med_idmap = NULL;
220 CERROR("client %s -> target %s "
221 "failed to init idmap [%ld]!\n",
222 client, obd->obd_name, err);
224 } else if (!med->med_idmap) {
225 CERROR("client %s -> target %s "
226 "failed to init(2) idmap!\n",
227 client, obd->obd_name);
231 CDEBUG(D_SEC, "client %s -> target %s is remote.\n",
232 client, obd->obd_name);
233 /* NB, MDS_CONNECT establish root idmap too! */
234 rc = mdt_handle_idmap(info);
239 void mdt_cleanup_idmap(struct mdt_export_data *med)
241 cfs_mutex_lock(&med->med_idmap_mutex);
242 if (med->med_idmap != NULL) {
243 lustre_idmap_fini(med->med_idmap);
244 med->med_idmap = NULL;
246 cfs_mutex_unlock(&med->med_idmap_mutex);
249 static inline void mdt_revoke_export_locks(struct obd_export *exp)
251 /* don't revoke locks during recovery */
252 if (exp->exp_obd->obd_recovering)
255 ldlm_revoke_export_locks(exp);
258 int mdt_handle_idmap(struct mdt_thread_info *info)
260 struct ptlrpc_request *req = mdt_info_req(info);
261 struct mdt_device *mdt = info->mti_mdt;
262 struct mdt_export_data *med;
263 struct ptlrpc_user_desc *pud = req->rq_user_desc;
264 struct md_identity *identity;
272 med = mdt_req2med(req);
273 if (!exp_connect_rmtclient(info->mti_exp))
276 opc = lustre_msg_get_opc(req->rq_reqmsg);
277 /* Bypass other opc */
278 if ((opc != SEC_CTX_INIT) && (opc != SEC_CTX_INIT_CONT) &&
279 (opc != SEC_CTX_FINI) && (opc != MDS_CONNECT))
282 LASSERT(med->med_idmap);
284 if (unlikely(!pud)) {
285 CDEBUG(D_SEC, "remote client must run with rq_user_desc "
290 if (req->rq_auth_mapped_uid == INVALID_UID) {
291 CDEBUG(D_SEC, "invalid authorized mapped uid, please check "
292 "/etc/lustre/idmap.conf!\n");
296 if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
297 CDEBUG(D_SEC, "remote client must run with identity_get "
302 identity = mdt_identity_get(mdt->mdt_identity_cache,
303 req->rq_auth_mapped_uid);
304 if (IS_ERR(identity)) {
305 CDEBUG(D_SEC, "can't get mdt identity(%u), no mapping added\n",
306 req->rq_auth_mapped_uid);
312 case SEC_CTX_INIT_CONT:
314 rc = lustre_idmap_add(med->med_idmap,
315 pud->pud_uid, identity->mi_uid,
316 pud->pud_gid, identity->mi_gid);
319 rc = lustre_idmap_del(med->med_idmap,
320 pud->pud_uid, identity->mi_uid,
321 pud->pud_gid, identity->mi_gid);
325 mdt_identity_put(mdt->mdt_identity_cache, identity);
332 case SEC_CTX_INIT_CONT:
334 mdt_revoke_export_locks(req->rq_export);
341 int ptlrpc_user_desc_do_idmap(struct ptlrpc_request *req,
342 struct ptlrpc_user_desc *pud)
344 struct mdt_export_data *med = mdt_req2med(req);
345 struct lustre_idmap_table *idmap = med->med_idmap;
349 /* Only remote client need desc_to_idmap. */
350 if (!exp_connect_rmtclient(req->rq_export))
353 uid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_uid);
354 if (uid == CFS_IDMAP_NOTFOUND) {
355 CDEBUG(D_SEC, "no mapping for uid %u\n", pud->pud_uid);
359 if (pud->pud_uid == pud->pud_fsuid) {
362 fsuid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_fsuid);
363 if (fsuid == CFS_IDMAP_NOTFOUND) {
364 CDEBUG(D_SEC, "no mapping for fsuid %u\n",
370 gid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_gid);
371 if (gid == CFS_IDMAP_NOTFOUND) {
372 CDEBUG(D_SEC, "no mapping for gid %u\n", pud->pud_gid);
376 if (pud->pud_gid == pud->pud_fsgid) {
379 fsgid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_fsgid);
380 if (fsgid == CFS_IDMAP_NOTFOUND) {
381 CDEBUG(D_SEC, "no mapping for fsgid %u\n",
389 pud->pud_fsuid = fsuid;
390 pud->pud_fsgid = fsgid;
398 void mdt_body_reverse_idmap(struct mdt_thread_info *info, struct mdt_body *body)
400 struct ptlrpc_request *req = mdt_info_req(info);
401 struct md_ucred *uc = mdt_ucred(info);
402 struct mdt_export_data *med = mdt_req2med(req);
403 struct lustre_idmap_table *idmap = med->med_idmap;
405 if (!exp_connect_rmtclient(info->mti_exp))
408 if (body->valid & OBD_MD_FLUID) {
409 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 1, body->uid);
411 if (uid == CFS_IDMAP_NOTFOUND) {
413 if (body->valid & OBD_MD_FLMODE)
414 body->mode = (body->mode & ~S_IRWXU) |
415 ((body->mode & S_IRWXO) << 6);
421 if (body->valid & OBD_MD_FLGID) {
422 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 1, body->gid);
424 if (gid == CFS_IDMAP_NOTFOUND) {
426 if (body->valid & OBD_MD_FLMODE)
427 body->mode = (body->mode & ~S_IRWXG) |
428 ((body->mode & S_IRWXO) << 3);
435 /* Do not ignore root_squash for non-setattr case. */
436 int mdt_fix_attr_ucred(struct mdt_thread_info *info, __u32 op)
438 struct ptlrpc_request *req = mdt_info_req(info);
439 struct md_ucred *uc = mdt_ucred(info);
440 struct lu_attr *attr = &info->mti_attr.ma_attr;
441 struct mdt_export_data *med = mdt_req2med(req);
442 struct lustre_idmap_table *idmap = med->med_idmap;
444 if ((uc->mu_valid != UCRED_OLD) && (uc->mu_valid != UCRED_NEW))
447 if (op != REINT_SETATTR) {
448 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1))
449 attr->la_uid = uc->mu_fsuid;
450 /* for S_ISGID, inherit gid from his parent, such work will be
451 * done in cmm/mdd layer, here set all cases as uc->mu_fsgid. */
452 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1))
453 attr->la_gid = uc->mu_fsgid;
454 } else if (exp_connect_rmtclient(info->mti_exp)) {
455 /* NB: -1 case will be handled by mdt_fix_attr() later. */
456 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1)) {
457 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 0,
460 if (uid == CFS_IDMAP_NOTFOUND) {
461 CDEBUG(D_SEC, "Deny chown to uid %u\n",
468 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1)) {
469 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 0,
472 if (gid == CFS_IDMAP_NOTFOUND) {
473 CDEBUG(D_SEC, "Deny chown to gid %u\n",