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.
30 * Copyright (c) 2011, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mdt/mdt_identity.c
38 * Author: Lai Siyao <lsy@clusterfs.com>
39 * Author: Fan Yong <fanyong@clusterfs.com>
42 #define DEBUG_SUBSYSTEM S_MDS
44 #include <linux/module.h>
45 #include <linux/kernel.h>
47 #include <linux/kmod.h>
48 #include <linux/string.h>
49 #include <linux/stat.h>
50 #include <linux/errno.h>
51 #include <linux/version.h>
52 #include <linux/unistd.h>
53 #include <asm/system.h>
54 #include <asm/uaccess.h>
56 #include <linux/stat.h>
57 #include <asm/uaccess.h>
58 #include <linux/slab.h>
60 #include <libcfs/libcfs.h>
61 #include <libcfs/lucache.h>
63 #include <obd_class.h>
64 #include <obd_support.h>
65 #include <lustre_net.h>
66 #include <lustre_import.h>
67 #include <lustre_dlm.h>
68 #include <lustre_lib.h>
70 #include "mdt_internal.h"
72 static void mdt_identity_entry_init(struct upcall_cache_entry *entry,
75 entry->u.identity.mi_uc_entry = entry;
78 static void mdt_identity_entry_free(struct upcall_cache *cache,
79 struct upcall_cache_entry *entry)
81 struct md_identity *identity = &entry->u.identity;
83 if (identity->mi_ginfo) {
84 cfs_put_group_info(identity->mi_ginfo);
85 identity->mi_ginfo = NULL;
88 if (identity->mi_nperms) {
89 LASSERT(identity->mi_perms);
90 OBD_FREE(identity->mi_perms,
91 identity->mi_nperms * sizeof(struct md_perm));
92 identity->mi_nperms = 0;
96 static int mdt_identity_do_upcall(struct upcall_cache *cache,
97 struct upcall_cache_entry *entry)
101 [0] = cache->uc_upcall,
102 [1] = cache->uc_name,
108 [1] = "PATH=/sbin:/usr/sbin",
111 struct timeval start, end;
115 /* There is race condition:
116 * "uc_upcall" was changed just after "is_identity_get_disabled" check.
118 cfs_read_lock(&cache->uc_upcall_rwlock);
119 CDEBUG(D_INFO, "The upcall is: '%s'\n", cache->uc_upcall);
121 if (unlikely(!strcmp(cache->uc_upcall, "NONE"))) {
122 CERROR("no upcall set\n");
123 GOTO(out, rc = -EREMCHG);
126 argv[0] = cache->uc_upcall;
127 snprintf(keystr, sizeof(keystr), LPU64, entry->ue_key);
129 cfs_gettimeofday(&start);
130 rc = USERMODEHELPER(argv[0], argv, envp);
131 cfs_gettimeofday(&end);
133 CERROR("%s: error invoking upcall %s %s %s: rc %d; "
134 "check /proc/fs/lustre/mdt/%s/identity_upcall, "
136 cache->uc_name, argv[0], argv[1], argv[2], rc,
137 cache->uc_name, cfs_timeval_sub(&end, &start, NULL));
139 CDEBUG(D_HA, "%s: invoked upcall %s %s %s, time %ldus\n",
140 cache->uc_name, argv[0], argv[1], argv[2],
141 cfs_timeval_sub(&end, &start, NULL));
146 cfs_read_unlock(&cache->uc_upcall_rwlock);
150 static int mdt_identity_parse_downcall(struct upcall_cache *cache,
151 struct upcall_cache_entry *entry,
154 struct md_identity *identity = &entry->u.identity;
155 struct identity_downcall_data *data = args;
156 cfs_group_info_t *ginfo = NULL;
157 struct md_perm *perms = NULL;
162 if (data->idd_ngroups > NGROUPS_MAX)
165 if (data->idd_ngroups > 0) {
166 ginfo = cfs_groups_alloc(data->idd_ngroups);
168 CERROR("failed to alloc %d groups\n", data->idd_ngroups);
172 lustre_groups_from_list(ginfo, data->idd_groups);
173 lustre_groups_sort(ginfo);
176 if (data->idd_nperms) {
177 size = data->idd_nperms * sizeof(*perms);
178 OBD_ALLOC(perms, size);
180 CERROR("failed to alloc %d permissions\n",
183 cfs_put_group_info(ginfo);
187 for (i = 0; i < data->idd_nperms; i++) {
188 perms[i].mp_nid = data->idd_perms[i].pdd_nid;
189 perms[i].mp_perm = data->idd_perms[i].pdd_perm;
193 identity->mi_uid = data->idd_uid;
194 identity->mi_gid = data->idd_gid;
195 identity->mi_ginfo = ginfo;
196 identity->mi_nperms = data->idd_nperms;
197 identity->mi_perms = perms;
199 CDEBUG(D_OTHER, "parse mdt identity@%p: %d:%d, ngroups %u, nperms %u\n",
200 identity, identity->mi_uid, identity->mi_gid,
201 data->idd_ngroups, data->idd_nperms);
206 struct md_identity *mdt_identity_get(struct upcall_cache *cache, __u32 uid)
208 struct upcall_cache_entry *entry;
211 return ERR_PTR(-ENOENT);
213 entry = upcall_cache_get_entry(cache, (__u64)uid, NULL);
215 return ERR_PTR(PTR_ERR(entry));
216 else if (unlikely(!entry))
217 return ERR_PTR(-ENOENT);
219 return &entry->u.identity;
222 void mdt_identity_put(struct upcall_cache *cache, struct md_identity *identity)
228 upcall_cache_put_entry(cache, identity->mi_uc_entry);
231 struct upcall_cache_ops mdt_identity_upcall_cache_ops = {
232 .init_entry = mdt_identity_entry_init,
233 .free_entry = mdt_identity_entry_free,
234 .do_upcall = mdt_identity_do_upcall,
235 .parse_downcall = mdt_identity_parse_downcall,
238 void mdt_flush_identity(struct upcall_cache *cache, int uid)
241 upcall_cache_flush_idle(cache);
243 upcall_cache_flush_one(cache, (__u64)uid, NULL);
247 * If there is LNET_NID_ANY in perm[i].mp_nid,
248 * it must be perm[0].mp_nid, and act as default perm.
250 __u32 mdt_identity_get_perm(struct md_identity *identity,
251 __u32 is_rmtclient, lnet_nid_t nid)
253 struct md_perm *perm;
257 LASSERT(is_rmtclient == 0);
258 return CFS_SETGRP_PERM;
261 perm = identity->mi_perms;
262 /* check exactly matched nid first */
263 for (i = identity->mi_nperms - 1; i > 0; i--) {
264 if (perm[i].mp_nid != nid)
266 return perm[i].mp_perm;
269 /* check LNET_NID_ANY then */
270 if ((identity->mi_nperms > 0) &&
271 ((perm[0].mp_nid == nid) || (perm[0].mp_nid == LNET_NID_ANY)))
272 return perm[0].mp_perm;
274 /* return default last */
275 return is_rmtclient ? 0 : CFS_SETGRP_PERM;
278 int mdt_pack_remote_perm(struct mdt_thread_info *info, struct mdt_object *o,
281 struct md_ucred *uc = mdt_ucred(info);
282 struct md_object *next = mdt_object_child(o);
283 struct mdt_remote_perm *perm = buf;
287 /* remote client request always pack ptlrpc_user_desc! */
290 if (!exp_connect_rmtclient(info->mti_exp))
293 if ((uc->mu_valid != UCRED_OLD) && (uc->mu_valid != UCRED_NEW))
296 perm->rp_uid = uc->mu_o_uid;
297 perm->rp_gid = uc->mu_o_gid;
298 perm->rp_fsuid = uc->mu_o_fsuid;
299 perm->rp_fsgid = uc->mu_o_fsgid;
301 perm->rp_access_perm = 0;
302 if (mo_permission(info->mti_env, NULL, next, NULL, MAY_READ) == 0)
303 perm->rp_access_perm |= MAY_READ;
304 if (mo_permission(info->mti_env, NULL, next, NULL, MAY_WRITE) == 0)
305 perm->rp_access_perm |= MAY_WRITE;
306 if (mo_permission(info->mti_env, NULL, next, NULL, MAY_EXEC) == 0)
307 perm->rp_access_perm |= MAY_EXEC;