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>
47 #include <libcfs/kp30.h>
49 #include <obd_class.h>
50 #include <obd_support.h>
51 #include <lustre_net.h>
52 #include <lustre_import.h>
53 #include <lustre_dlm.h>
54 #include <lustre_sec.h>
55 #include <lustre_lib.h>
56 #include <lustre_ucache.h>
58 #include "mdt_internal.h"
60 int mdt_init_idmap(struct mdt_thread_info *info)
62 struct ptlrpc_request *req = mdt_info_req(info);
63 char *client = libcfs_nid2str(req->rq_peer.nid);
64 struct mdt_export_data *med = mdt_req2med(req);
65 struct obd_device *obd = req->rq_export->exp_obd;
66 struct obd_connect_data *data, *reply;
70 data = req_capsule_client_get(info->mti_pill, &RMF_CONNECT_DATA);
71 reply = req_capsule_server_get(info->mti_pill, &RMF_CONNECT_DATA);
72 if (data == NULL || reply == NULL)
75 if (!req->rq_auth_gss || req->rq_auth_usr_mdt) {
76 med->med_rmtclient = 0;
77 reply->ocd_connect_flags &= ~OBD_CONNECT_RMT_CLIENT;
81 remote = data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT;
84 med->med_rmtclient = 1;
85 if (!req->rq_auth_remote)
86 CDEBUG(D_SEC, "client (local realm) %s -> target %s "
87 "asked to be remote!\n", client, obd->obd_name);
88 } else if (req->rq_auth_remote) {
89 med->med_rmtclient = 1;
90 CDEBUG(D_SEC, "client (remote realm) %s -> target %s forced "
91 "to be remote!\n", client, obd->obd_name);
94 if (med->med_rmtclient) {
95 down(&med->med_idmap_sem);
97 med->med_idmap = lustre_idmap_init();
98 up(&med->med_idmap_sem);
100 if (IS_ERR(med->med_idmap)) {
101 long err = PTR_ERR(med->med_idmap);
103 med->med_idmap = NULL;
104 CERROR("client %s -> target %s "
105 "failed to init idmap [%ld]!\n",
106 client, obd->obd_name, err);
108 } else if (!med->med_idmap) {
109 CERROR("client %s -> target %s "
110 "failed to init(2) idmap!\n",
111 client, obd->obd_name);
115 reply->ocd_connect_flags &= ~OBD_CONNECT_LCL_CLIENT;
116 CDEBUG(D_SEC, "client %s -> target %s is remote.\n",
117 client, obd->obd_name);
119 /* NB, MDS_CONNECT establish root idmap too! */
120 rc = mdt_handle_idmap(info);
122 if (req->rq_auth_uid == INVALID_UID) {
123 CDEBUG(D_SEC, "client %s -> target %s: user is not "
124 "authenticated!\n", client, obd->obd_name);
127 reply->ocd_connect_flags &= ~OBD_CONNECT_RMT_CLIENT;
133 void mdt_cleanup_idmap(struct mdt_export_data *med)
135 LASSERT(med->med_rmtclient);
137 down(&med->med_idmap_sem);
138 if (med->med_idmap != NULL) {
139 lustre_idmap_fini(med->med_idmap);
140 med->med_idmap = NULL;
142 up(&med->med_idmap_sem);
145 static inline void mdt_revoke_export_locks(struct obd_export *exp)
147 /* don't revoke locks during recovery */
148 if (exp->exp_obd->obd_recovering)
151 ldlm_revoke_export_locks(exp);
154 int mdt_handle_idmap(struct mdt_thread_info *info)
156 struct ptlrpc_request *req = mdt_info_req(info);
157 struct mdt_device *mdt = info->mti_mdt;
158 struct mdt_export_data *med;
159 struct ptlrpc_user_desc *pud = req->rq_user_desc;
160 struct md_identity *identity;
168 med = mdt_req2med(req);
169 if (!med->med_rmtclient)
172 opc = lustre_msg_get_opc(req->rq_reqmsg);
173 /* Bypass other opc */
174 if ((opc != SEC_CTX_INIT) && (opc != SEC_CTX_INIT_CONT) &&
175 (opc != SEC_CTX_FINI) && (opc != MDS_CONNECT))
178 LASSERT(med->med_idmap);
180 if (unlikely(!pud)) {
181 CDEBUG(D_SEC, "remote client must run with rq_user_desc "
186 if (req->rq_auth_mapped_uid == INVALID_UID) {
187 CDEBUG(D_SEC, "invalid authorized mapped uid, please check "
188 "/etc/lustre/idmap.conf!\n");
192 if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
193 CDEBUG(D_SEC, "remote client must run with identity_get "
198 identity = mdt_identity_get(mdt->mdt_identity_cache,
199 req->rq_auth_mapped_uid);
200 if (IS_ERR(identity)) {
201 CDEBUG(D_SEC, "can't get mdt identity(%u), no mapping added\n",
202 req->rq_auth_mapped_uid);
208 case SEC_CTX_INIT_CONT:
210 rc = lustre_idmap_add(med->med_idmap,
211 pud->pud_uid, identity->mi_uid,
212 pud->pud_gid, identity->mi_gid);
215 rc = lustre_idmap_del(med->med_idmap,
216 pud->pud_uid, identity->mi_uid,
217 pud->pud_gid, identity->mi_gid);
221 mdt_identity_put(mdt->mdt_identity_cache, identity);
228 case SEC_CTX_INIT_CONT:
230 mdt_revoke_export_locks(req->rq_export);
237 int ptlrpc_user_desc_do_idmap(struct ptlrpc_request *req,
238 struct ptlrpc_user_desc *pud)
240 struct mdt_export_data *med = mdt_req2med(req);
241 struct lustre_idmap_table *idmap = med->med_idmap;
245 /* Only remote client need desc_to_idmap. */
246 if (!med->med_rmtclient)
249 uid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_uid);
250 if (uid == CFS_IDMAP_NOTFOUND) {
251 CDEBUG(D_SEC, "no mapping for uid %u\n", pud->pud_uid);
255 if (pud->pud_uid == pud->pud_fsuid) {
258 fsuid = lustre_idmap_lookup_uid(NULL, idmap, 0, pud->pud_fsuid);
259 if (fsuid == CFS_IDMAP_NOTFOUND) {
260 CDEBUG(D_SEC, "no mapping for fsuid %u\n",
266 gid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_gid);
267 if (gid == CFS_IDMAP_NOTFOUND) {
268 CDEBUG(D_SEC, "no mapping for gid %u\n", pud->pud_gid);
272 if (pud->pud_gid == pud->pud_fsgid) {
275 fsgid = lustre_idmap_lookup_gid(NULL, idmap, 0, pud->pud_fsgid);
276 if (fsgid == CFS_IDMAP_NOTFOUND) {
277 CDEBUG(D_SEC, "no mapping for fsgid %u\n",
285 pud->pud_fsuid = fsuid;
286 pud->pud_fsgid = fsgid;
294 void mdt_body_reverse_idmap(struct mdt_thread_info *info, struct mdt_body *body)
296 struct ptlrpc_request *req = mdt_info_req(info);
297 struct md_ucred *uc = mdt_ucred(info);
298 struct mdt_export_data *med = mdt_req2med(req);
299 struct lustre_idmap_table *idmap = med->med_idmap;
301 if (!med->med_rmtclient)
304 if (body->valid & OBD_MD_FLUID) {
305 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 1, body->uid);
307 if (uid == CFS_IDMAP_NOTFOUND) {
309 if (body->valid & OBD_MD_FLMODE)
310 body->mode = (body->mode & ~S_IRWXU) |
311 ((body->mode & S_IRWXO) << 6);
317 if (body->valid & OBD_MD_FLGID) {
318 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 1, body->gid);
320 if (gid == CFS_IDMAP_NOTFOUND) {
322 if (body->valid & OBD_MD_FLMODE)
323 body->mode = (body->mode & ~S_IRWXG) |
324 ((body->mode & S_IRWXO) << 3);
331 /* Do not ignore root_squash for non-setattr case. */
332 int mdt_fix_attr_ucred(struct mdt_thread_info *info, __u32 op)
334 struct ptlrpc_request *req = mdt_info_req(info);
335 struct md_ucred *uc = mdt_ucred(info);
336 struct lu_attr *attr = &info->mti_attr.ma_attr;
337 struct mdt_export_data *med = mdt_req2med(req);
338 struct lustre_idmap_table *idmap = med->med_idmap;
340 if ((uc->mu_valid != UCRED_OLD) && (uc->mu_valid != UCRED_NEW))
343 if (op != REINT_SETATTR) {
344 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1))
345 attr->la_uid = uc->mu_fsuid;
346 /* for S_ISGID, inherit gid from his parent, such work will be
347 * done in cmm/mdd layer, here set all cases as uc->mu_fsgid. */
348 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1))
349 attr->la_gid = uc->mu_fsgid;
350 } else if (med->med_rmtclient) {
351 /* NB: -1 case will be handled by mdt_fix_attr() later. */
352 if ((attr->la_valid & LA_UID) && (attr->la_uid != -1)) {
353 uid_t uid = lustre_idmap_lookup_uid(uc, idmap, 0,
356 if (uid == CFS_IDMAP_NOTFOUND) {
357 CDEBUG(D_SEC, "Deny chown to uid %u\n",
364 if ((attr->la_valid & LA_GID) && (attr->la_gid != -1)) {
365 gid_t gid = lustre_idmap_lookup_gid(uc, idmap, 0,
368 if (gid == CFS_IDMAP_NOTFOUND) {
369 CDEBUG(D_SEC, "Deny chown to gid %u\n",