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 #include <linux/module.h>
43 #include <linux/kernel.h>
45 #include <linux/kmod.h>
46 #include <linux/string.h>
47 #include <linux/stat.h>
48 #include <linux/errno.h>
49 #include <linux/version.h>
50 #include <linux/unistd.h>
51 #include <asm/system.h>
52 #include <asm/uaccess.h>
54 #include <linux/stat.h>
55 #include <asm/uaccess.h>
56 #include <linux/slab.h>
58 #include <libcfs/libcfs.h>
59 #include <libcfs/lucache.h>
61 #include <obd_class.h>
62 #include <obd_support.h>
63 #include <lustre_net.h>
64 #include <lustre_import.h>
65 #include <lustre_dlm.h>
66 #include <lustre_sec.h>
67 #include <lustre_lib.h>
69 #include "mdt_internal.h"
71 #define mdt_init_sec_none(reply, exp) \
73 reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT | \
74 OBD_CONNECT_RMT_CLIENT_FORCE | \
75 OBD_CONNECT_MDS_CAPA | \
76 OBD_CONNECT_OSS_CAPA); \
77 cfs_spin_lock(&exp->exp_lock); \
78 exp->exp_connect_flags = reply->ocd_connect_flags; \
79 cfs_spin_unlock(&exp->exp_lock); \
82 int mdt_init_sec_level(struct mdt_thread_info *info)
84 struct mdt_device *mdt = info->mti_mdt;
85 struct ptlrpc_request *req = mdt_info_req(info);
86 char *client = libcfs_nid2str(req->rq_peer.nid);
87 struct obd_export *exp = req->rq_export;
88 struct obd_device *obd = exp->exp_obd;
89 struct obd_connect_data *data, *reply;
93 data = req_capsule_client_get(info->mti_pill, &RMF_CONNECT_DATA);
94 reply = req_capsule_server_get(info->mti_pill, &RMF_CONNECT_DATA);
95 if (data == NULL || reply == NULL)
98 /* connection from MDT is always trusted */
99 if (req->rq_auth_usr_mdt) {
100 mdt_init_sec_none(reply, exp);
104 /* no GSS support case */
105 if (!req->rq_auth_gss) {
106 if (mdt->mdt_sec_level > LUSTRE_SEC_NONE) {
107 CWARN("client %s -> target %s does not user GSS, "
108 "can not run under security level %d.\n",
109 client, obd->obd_name, mdt->mdt_sec_level);
112 mdt_init_sec_none(reply, exp);
117 /* old version case */
118 if (unlikely(!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) ||
119 !(data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) ||
120 !(data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA))) {
121 if (mdt->mdt_sec_level > LUSTRE_SEC_NONE) {
122 CWARN("client %s -> target %s uses old version, "
123 "can not run under security level %d.\n",
124 client, obd->obd_name, mdt->mdt_sec_level);
127 CWARN("client %s -> target %s uses old version, "
128 "run under security level %d.\n",
129 client, obd->obd_name, mdt->mdt_sec_level);
130 mdt_init_sec_none(reply, exp);
135 remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT_FORCE;
137 if (!req->rq_auth_remote)
138 CDEBUG(D_SEC, "client (local realm) %s -> target %s "
139 "asked to be remote.\n", client, obd->obd_name);
140 } else if (req->rq_auth_remote) {
142 CDEBUG(D_SEC, "client (remote realm) %s -> target %s is set "
143 "as remote by default.\n", client, obd->obd_name);
147 if (!mdt->mdt_opts.mo_oss_capa) {
148 CDEBUG(D_SEC, "client %s -> target %s is set as remote,"
149 " but OSS capabilities are not enabled: %d.\n",
150 client, obd->obd_name, mdt->mdt_opts.mo_oss_capa);
154 if (req->rq_auth_uid == INVALID_UID) {
155 CDEBUG(D_SEC, "client %s -> target %s: user is not "
156 "authenticated!\n", client, obd->obd_name);
161 switch (mdt->mdt_sec_level) {
162 case LUSTRE_SEC_NONE:
164 mdt_init_sec_none(reply, exp);
167 CDEBUG(D_SEC, "client %s -> target %s is set as remote, "
168 "can not run under security level %d.\n",
169 client, obd->obd_name, mdt->mdt_sec_level);
172 case LUSTRE_SEC_REMOTE:
174 mdt_init_sec_none(reply, exp);
178 reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |
179 OBD_CONNECT_RMT_CLIENT_FORCE);
180 if (!mdt->mdt_opts.mo_mds_capa)
181 reply->ocd_connect_flags &= ~OBD_CONNECT_MDS_CAPA;
182 if (!mdt->mdt_opts.mo_oss_capa)
183 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
185 cfs_spin_lock(&exp->exp_lock);
186 exp->exp_connect_flags = reply->ocd_connect_flags;
187 cfs_spin_unlock(&exp->exp_lock);
197 int mdt_init_idmap(struct mdt_thread_info *info)
199 struct ptlrpc_request *req = mdt_info_req(info);
200 struct mdt_export_data *med = mdt_req2med(req);
201 struct obd_export *exp = req->rq_export;
202 char *client = libcfs_nid2str(req->rq_peer.nid);
203 struct obd_device *obd = exp->exp_obd;
207 if (exp_connect_rmtclient(exp)) {
208 cfs_mutex_lock(&med->med_idmap_mutex);
210 med->med_idmap = lustre_idmap_init();
211 cfs_mutex_unlock(&med->med_idmap_mutex);
213 if (IS_ERR(med->med_idmap)) {
214 long err = PTR_ERR(med->med_idmap);
216 med->med_idmap = NULL;
217 CERROR("client %s -> target %s "
218 "failed to init idmap [%ld]!\n",
219 client, obd->obd_name, err);
221 } else if (!med->med_idmap) {
222 CERROR("client %s -> target %s "
223 "failed to init(2) idmap!\n",
224 client, obd->obd_name);
228 CDEBUG(D_SEC, "client %s -> target %s is remote.\n",
229 client, obd->obd_name);
230 /* NB, MDS_CONNECT establish root idmap too! */
231 rc = mdt_handle_idmap(info);
236 void mdt_cleanup_idmap(struct mdt_export_data *med)
238 cfs_mutex_lock(&med->med_idmap_mutex);
239 if (med->med_idmap != NULL) {
240 lustre_idmap_fini(med->med_idmap);
241 med->med_idmap = NULL;
243 cfs_mutex_unlock(&med->med_idmap_mutex);
246 static inline void mdt_revoke_export_locks(struct obd_export *exp)
248 /* don't revoke locks during recovery */
249 if (exp->exp_obd->obd_recovering)
252 ldlm_revoke_export_locks(exp);
255 int mdt_handle_idmap(struct mdt_thread_info *info)
257 struct ptlrpc_request *req = mdt_info_req(info);
258 struct mdt_device *mdt = info->mti_mdt;
259 struct mdt_export_data *med;
260 struct ptlrpc_user_desc *pud = req->rq_user_desc;
261 struct md_identity *identity;
269 med = mdt_req2med(req);
270 if (!exp_connect_rmtclient(info->mti_exp))
273 opc = lustre_msg_get_opc(req->rq_reqmsg);
274 /* Bypass other opc */
275 if ((opc != SEC_CTX_INIT) && (opc != SEC_CTX_INIT_CONT) &&
276 (opc != SEC_CTX_FINI) && (opc != MDS_CONNECT))
279 LASSERT(med->med_idmap);
281 if (unlikely(!pud)) {
282 CDEBUG(D_SEC, "remote client must run with rq_user_desc "
287 if (req->rq_auth_mapped_uid == INVALID_UID) {
288 CDEBUG(D_SEC, "invalid authorized mapped uid, please check "
289 "/etc/lustre/idmap.conf!\n");
293 if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
294 CDEBUG(D_SEC, "remote client must run with identity_get "
299 identity = mdt_identity_get(mdt->mdt_identity_cache,
300 req->rq_auth_mapped_uid);
301 if (IS_ERR(identity)) {
302 CDEBUG(D_SEC, "can't get mdt identity(%u), no mapping added\n",
303 req->rq_auth_mapped_uid);
309 case SEC_CTX_INIT_CONT:
311 rc = lustre_idmap_add(med->med_idmap,
312 pud->pud_uid, identity->mi_uid,
313 pud->pud_gid, identity->mi_gid);
316 rc = lustre_idmap_del(med->med_idmap,
317 pud->pud_uid, identity->mi_uid,
318 pud->pud_gid, identity->mi_gid);
322 mdt_identity_put(mdt->mdt_identity_cache, identity);
329 case SEC_CTX_INIT_CONT:
331 mdt_revoke_export_locks(req->rq_export);
338 int ptlrpc_user_desc_do_idmap(struct ptlrpc_request *req,
339 struct ptlrpc_user_desc *pud)
341 struct mdt_export_data *med = mdt_req2med(req);
342 struct lustre_idmap_table *idmap = med->med_idmap;
346 /* Only remote client need desc_to_idmap. */
347 if (!exp_connect_rmtclient(req->rq_export))
350 uid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_uid);
351 if (uid == CFS_IDMAP_NOTFOUND) {
352 CDEBUG(D_SEC, "no mapping for uid %u\n", pud->pud_uid);
356 if (pud->pud_uid == pud->pud_fsuid) {
359 fsuid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_fsuid);
360 if (fsuid == CFS_IDMAP_NOTFOUND) {
361 CDEBUG(D_SEC, "no mapping for fsuid %u\n",
367 gid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_gid);
368 if (gid == CFS_IDMAP_NOTFOUND) {
369 CDEBUG(D_SEC, "no mapping for gid %u\n", pud->pud_gid);
373 if (pud->pud_gid == pud->pud_fsgid) {
376 fsgid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_fsgid);
377 if (fsgid == CFS_IDMAP_NOTFOUND) {
378 CDEBUG(D_SEC, "no mapping for fsgid %u\n",
386 pud->pud_fsuid = fsuid;
387 pud->pud_fsgid = fsgid;
395 void mdt_body_reverse_idmap(struct mdt_thread_info *info, struct mdt_body *body)
397 struct ptlrpc_request *req = mdt_info_req(info);
398 struct md_ucred *uc = mdt_ucred(info);
399 struct mdt_export_data *med = mdt_req2med(req);
400 struct lustre_idmap_table *idmap = med->med_idmap;
402 if (!exp_connect_rmtclient(info->mti_exp))
405 if (body->valid & OBD_MD_FLUID) {
406 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 1, body->uid);
408 if (uid == CFS_IDMAP_NOTFOUND) {
410 if (body->valid & OBD_MD_FLMODE)
411 body->mode = (body->mode & ~S_IRWXU) |
412 ((body->mode & S_IRWXO) << 6);
418 if (body->valid & OBD_MD_FLGID) {
419 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 1, body->gid);
421 if (gid == CFS_IDMAP_NOTFOUND) {
423 if (body->valid & OBD_MD_FLMODE)
424 body->mode = (body->mode & ~S_IRWXG) |
425 ((body->mode & S_IRWXO) << 3);
432 /* Do not ignore root_squash for non-setattr case. */
433 int mdt_fix_attr_ucred(struct mdt_thread_info *info, __u32 op)
435 struct ptlrpc_request *req = mdt_info_req(info);
436 struct md_ucred *uc = mdt_ucred(info);
437 struct lu_attr *attr = &info->mti_attr.ma_attr;
438 struct mdt_export_data *med = mdt_req2med(req);
439 struct lustre_idmap_table *idmap = med->med_idmap;
441 if ((uc->mu_valid != UCRED_OLD) && (uc->mu_valid != UCRED_NEW))
444 if (op != REINT_SETATTR) {
445 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1))
446 attr->la_uid = uc->mu_fsuid;
447 /* for S_ISGID, inherit gid from his parent, such work will be
448 * done in cmm/mdd layer, here set all cases as uc->mu_fsgid. */
449 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1))
450 attr->la_gid = uc->mu_fsgid;
451 } else if (exp_connect_rmtclient(info->mti_exp)) {
452 /* NB: -1 case will be handled by mdt_fix_attr() later. */
453 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1)) {
454 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 0,
457 if (uid == CFS_IDMAP_NOTFOUND) {
458 CDEBUG(D_SEC, "Deny chown to uid %u\n",
465 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1)) {
466 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 0,
469 if (gid == CFS_IDMAP_NOTFOUND) {
470 CDEBUG(D_SEC, "Deny chown to gid %u\n",