1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2004-2006 Cluster File Systems, Inc.
5 * Author: Lai Siyao <lsy@clusterfs.com>
6 * Author: Fan Yong <fanyong@clusterfs.com>
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #define DEBUG_SUBSYSTEM S_MDS
30 #include <linux/config.h>
31 #include <linux/module.h>
32 #include <linux/kernel.h>
34 #include <linux/kmod.h>
35 #include <linux/string.h>
36 #include <linux/stat.h>
37 #include <linux/errno.h>
38 #include <linux/version.h>
39 #include <linux/unistd.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
43 #include <linux/stat.h>
44 #include <asm/uaccess.h>
45 #include <linux/slab.h>
46 #include <asm/segment.h>
48 #include <libcfs/kp30.h>
50 #include <obd_class.h>
51 #include <obd_support.h>
52 #include <lustre_net.h>
53 #include <lustre_import.h>
54 #include <lustre_dlm.h>
55 #include <lustre_sec.h>
56 #include <lustre_lib.h>
57 #include <lustre_ucache.h>
59 #include "mdt_internal.h"
61 int mdt_init_idmap(struct mdt_thread_info *info)
63 struct ptlrpc_request *req = mdt_info_req(info);
64 char *client = libcfs_nid2str(req->rq_peer.nid);
65 struct mdt_export_data *med = mdt_req2med(req);
66 struct obd_device *obd = req->rq_export->exp_obd;
67 struct obd_connect_data *data, *reply;
71 data = req_capsule_client_get(info->mti_pill, &RMF_CONNECT_DATA);
72 reply = req_capsule_server_get(info->mti_pill, &RMF_CONNECT_DATA);
73 if (data == NULL || reply == NULL)
76 if (!req->rq_auth_gss || req->rq_auth_usr_mdt) {
77 med->med_rmtclient = 0;
78 reply->ocd_connect_flags &= ~OBD_CONNECT_RMT_CLIENT;
82 remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT;
85 med->med_rmtclient = 1;
86 if (!req->rq_auth_remote)
87 CWARN("client (local realm) %s -> target %s asked "
88 "to be remote!\n", client, obd->obd_name);
89 } else if (req->rq_auth_remote) {
90 med->med_rmtclient = 1;
91 CWARN("client (remote realm) %s -> target %s forced "
92 "to be remote!\n", client, obd->obd_name);
95 if (med->med_rmtclient) {
96 down(&med->med_idmap_sem);
98 med->med_idmap = lustre_idmap_init();
99 up(&med->med_idmap_sem);
101 if (IS_ERR(med->med_idmap)) {
102 long err = PTR_ERR(med->med_idmap);
104 med->med_idmap = NULL;
105 CERROR("client %s -> target %s "
106 "failed to init idmap [%ld]!\n",
107 client, obd->obd_name, err);
109 } else if (!med->med_idmap) {
110 CERROR("client %s -> target %s "
111 "failed to init(2) idmap!\n",
112 client, obd->obd_name);
116 reply->ocd_connect_flags &= ~OBD_CONNECT_LCL_CLIENT;
117 CDEBUG(D_SEC, "client %s -> target %s is remote.\n",
118 client, obd->obd_name);
120 /* NB, MDS_CONNECT establish root idmap too! */
121 rc = mdt_handle_idmap(info);
123 if (req->rq_auth_uid == INVALID_UID) {
124 CERROR("client %s -> target %s: user is not "
125 "authenticated!\n", client, obd->obd_name);
128 reply->ocd_connect_flags &= ~OBD_CONNECT_RMT_CLIENT;
134 void mdt_cleanup_idmap(struct mdt_export_data *med)
136 LASSERT(med->med_rmtclient);
138 down(&med->med_idmap_sem);
139 if (med->med_idmap != NULL) {
140 lustre_idmap_fini(med->med_idmap);
141 med->med_idmap = NULL;
143 up(&med->med_idmap_sem);
146 static inline void mdt_revoke_export_locks(struct obd_export *exp)
148 /* don't revoke locks during recovery */
149 if (exp->exp_obd->obd_recovering)
152 ldlm_revoke_export_locks(exp);
155 int mdt_handle_idmap(struct mdt_thread_info *info)
157 struct ptlrpc_request *req = mdt_info_req(info);
158 struct mdt_device *mdt = info->mti_mdt;
159 struct mdt_export_data *med;
160 struct ptlrpc_user_desc *pud = req->rq_user_desc;
161 struct md_identity *identity;
169 med = mdt_req2med(req);
170 if (!med->med_rmtclient)
173 opc = lustre_msg_get_opc(req->rq_reqmsg);
174 /* Bypass other opc */
175 if ((opc != SEC_CTX_INIT) && (opc != SEC_CTX_INIT_CONT) &&
176 (opc != SEC_CTX_FINI) && (opc != MDS_CONNECT))
179 LASSERT(med->med_idmap);
181 if (unlikely(!pud)) {
182 CERROR("remote client must run with rq_user_desc present\n");
186 if (req->rq_auth_mapped_uid == INVALID_UID) {
187 CERROR("invalid authorized mapped uid, please check "
188 "/etc/lustre/idmap.conf!\n");
192 if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
193 CERROR("remote client must run with identity_get enabled!\n");
197 identity = mdt_identity_get(mdt->mdt_identity_cache,
198 req->rq_auth_mapped_uid);
200 CERROR("can't get mdt identity(%u), no mapping added\n",
201 req->rq_auth_mapped_uid);
207 case SEC_CTX_INIT_CONT:
209 rc = lustre_idmap_add(med->med_idmap,
210 pud->pud_uid, identity->mi_uid,
211 pud->pud_gid, identity->mi_gid);
214 rc = lustre_idmap_del(med->med_idmap,
215 pud->pud_uid, identity->mi_uid,
216 pud->pud_gid, identity->mi_gid);
220 mdt_identity_put(mdt->mdt_identity_cache, identity);
227 case SEC_CTX_INIT_CONT:
229 mdt_revoke_export_locks(req->rq_export);
236 int ptlrpc_user_desc_do_idmap(struct ptlrpc_request *req,
237 struct ptlrpc_user_desc *pud)
239 struct mdt_export_data *med = mdt_req2med(req);
240 struct lustre_idmap_table *idmap = med->med_idmap;
244 /* Only remote client need desc_to_idmap. */
245 if (!med->med_rmtclient)
248 uid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_uid);
249 if (uid == CFS_IDMAP_NOTFOUND) {
250 CERROR("no mapping for uid %u\n", pud->pud_uid);
254 if (pud->pud_uid == pud->pud_fsuid) {
257 fsuid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_fsuid);
258 if (fsuid == CFS_IDMAP_NOTFOUND) {
259 CERROR("no mapping for fsuid %u\n", pud->pud_fsuid);
264 gid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_gid);
265 if (gid == CFS_IDMAP_NOTFOUND) {
266 CERROR("no mapping for gid %u\n", pud->pud_gid);
270 if (pud->pud_gid == pud->pud_fsgid) {
273 fsgid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_fsgid);
274 if (fsgid == CFS_IDMAP_NOTFOUND) {
275 CERROR("no mapping for fsgid %u\n", pud->pud_fsgid);
282 pud->pud_fsuid = fsuid;
283 pud->pud_fsgid = fsgid;
291 void mdt_body_reverse_idmap(struct mdt_thread_info *info, struct mdt_body *body)
293 struct ptlrpc_request *req = mdt_info_req(info);
294 struct md_ucred *uc = mdt_ucred(info);
295 struct mdt_export_data *med = mdt_req2med(req);
296 struct lustre_idmap_table *idmap = med->med_idmap;
298 if (!med->med_rmtclient)
301 if (body->valid & OBD_MD_FLUID) {
302 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 1, body->uid);
304 if (uid == CFS_IDMAP_NOTFOUND) {
306 if (body->valid & OBD_MD_FLMODE)
307 body->mode = (body->mode & ~S_IRWXU) |
308 ((body->mode & S_IRWXO) << 6);
314 if (body->valid & OBD_MD_FLGID) {
315 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 1, body->gid);
317 if (gid == CFS_IDMAP_NOTFOUND) {
319 if (body->valid & OBD_MD_FLMODE)
320 body->mode = (body->mode & ~S_IRWXG) |
321 ((body->mode & S_IRWXO) << 3);
328 /* Do not ignore root_squash for non-setattr case. */
329 int mdt_fix_attr_ucred(struct mdt_thread_info *info, __u32 op)
331 struct ptlrpc_request *req = mdt_info_req(info);
332 struct md_ucred *uc = mdt_ucred(info);
333 struct lu_attr *attr = &info->mti_attr.ma_attr;
334 struct mdt_export_data *med = mdt_req2med(req);
335 struct lustre_idmap_table *idmap = med->med_idmap;
337 if ((uc->mu_valid != UCRED_OLD) && (uc->mu_valid != UCRED_NEW))
340 if (op != REINT_SETATTR) {
341 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1))
342 attr->la_uid = uc->mu_fsuid;
343 /* for S_ISGID, inherit gid from his parent, such work will be
344 * done in cmm/mdd layer, here set all cases as uc->mu_fsgid. */
345 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1))
346 attr->la_gid = uc->mu_fsgid;
347 } else if (med->med_rmtclient) {
348 /* NB: -1 case will be handled by mdt_fix_attr() later. */
349 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1)) {
350 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 0,
353 if (uid == CFS_IDMAP_NOTFOUND) {
354 CWARN("Deny chown to uid %u\n", attr->la_uid);
360 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1)) {
361 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 0,
364 if (gid == CFS_IDMAP_NOTFOUND) {
365 CWARN("Deny chown to gid %u\n", attr->la_gid);