1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
31 * Copyright (c) 2011 Whamcloud, Inc.
34 * Copyright (c) 2011 Whamcloud, Inc.
37 * This file is part of Lustre, http://www.lustre.org/
38 * Lustre is a trademark of Sun Microsystems, Inc.
40 * lustre/mdt/mdt_capa.c
42 * Lustre Metadata Target (mdt) capability key read/write/update.
44 * Author: Lai Siyao <lsy@clusterfs.com>
48 # define EXPORT_SYMTAB
50 #define DEBUG_SUBSYSTEM S_MDS
52 #include "mdt_internal.h"
54 static inline void set_capa_key_expiry(struct mdt_device *mdt)
56 mdt->mdt_ck_expiry = jiffies + mdt->mdt_ck_timeout * CFS_HZ;
59 static void make_capa_key(struct lustre_capa_key *key,
60 mdsno_t mdsnum, int keyid)
63 key->lk_keyid = keyid + 1;
64 cfs_get_random_bytes(key->lk_key, sizeof(key->lk_key));
67 static inline void lck_cpu_to_le(struct lustre_capa_key *tgt,
68 struct lustre_capa_key *src)
70 tgt->lk_seq = cpu_to_le64(src->lk_seq);
71 tgt->lk_keyid = cpu_to_le32(src->lk_keyid);
72 tgt->lk_padding = cpu_to_le32(src->lk_padding);
73 memcpy(tgt->lk_key, src->lk_key, sizeof(src->lk_key));
76 static inline void lck_le_to_cpu(struct lustre_capa_key *tgt,
77 struct lustre_capa_key *src)
79 tgt->lk_seq = le64_to_cpu(src->lk_seq);
80 tgt->lk_keyid = le32_to_cpu(src->lk_keyid);
81 tgt->lk_padding = le32_to_cpu(src->lk_padding);
82 memcpy(tgt->lk_key, src->lk_key, sizeof(src->lk_key));
85 static int write_capa_keys(const struct lu_env *env,
86 struct mdt_device *mdt,
87 struct lustre_capa_key *keys)
89 struct mdt_thread_info *mti;
90 struct lustre_capa_key *tmp;
95 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
96 th = mdt_trans_create(env, mdt);
100 rc = dt_declare_record_write(env, mdt->mdt_ck_obj,
101 sizeof(*tmp) * 3, 0, th);
105 rc = mdt_trans_start(env, mdt, th);
109 tmp = &mti->mti_capa_key;
111 for (i = 0; i < 2; i++) {
112 lck_cpu_to_le(tmp, &keys[i]);
114 rc = dt_record_write(env, mdt->mdt_ck_obj,
115 mdt_buf_const(env, tmp, sizeof(*tmp)),
122 mdt_trans_stop(env, mdt, th);
124 CDEBUG(D_INFO, "write capability keys rc = %d:\n", rc);
128 static int read_capa_keys(const struct lu_env *env,
129 struct mdt_device *mdt,
130 struct lustre_capa_key *keys)
132 struct mdt_thread_info *mti;
133 struct lustre_capa_key *tmp;
137 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
138 tmp = &mti->mti_capa_key;
140 for (i = 0; i < 2; i++) {
141 rc = dt_record_read(env, mdt->mdt_ck_obj,
142 mdt_buf(env, tmp, sizeof(*tmp)), &off);
146 lck_le_to_cpu(&keys[i], tmp);
147 DEBUG_CAPA_KEY(D_SEC, &keys[i], "read");
153 int mdt_capa_keys_init(const struct lu_env *env, struct mdt_device *mdt)
155 struct lustre_capa_key *keys = mdt->mdt_capa_keys;
156 struct mdt_thread_info *mti;
157 struct dt_object *obj;
164 mdsnum = mdt_md_site(mdt)->ms_node_id;
166 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
167 LASSERT(mti != NULL);
168 la = &mti->mti_attr.ma_attr;
170 obj = mdt->mdt_ck_obj;
171 rc = obj->do_ops->do_attr_get(env, mdt->mdt_ck_obj, la, BYPASS_CAPA);
175 size = (unsigned long)la->la_size;
179 for (i = 0; i < 2; i++) {
180 make_capa_key(&keys[i], mdsnum, i);
181 DEBUG_CAPA_KEY(D_SEC, &keys[i], "initializing");
184 rc = write_capa_keys(env, mdt, keys);
186 CERROR("error writing MDS %s: rc %d\n", CAPA_KEYS, rc);
190 rc = read_capa_keys(env, mdt, keys);
192 CERROR("error reading MDS %s: rc %d\n", CAPA_KEYS, rc);
196 set_capa_key_expiry(mdt);
197 cfs_timer_arm(&mdt->mdt_ck_timer, mdt->mdt_ck_expiry);
198 CDEBUG(D_SEC, "mds_ck_timer %lu\n", mdt->mdt_ck_expiry);
202 void mdt_ck_timer_callback(unsigned long castmeharder)
204 struct mdt_device *mdt = (struct mdt_device *)castmeharder;
205 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
208 thread_add_flags(thread, SVC_EVENT);
209 cfs_waitq_signal(&thread->t_ctl_waitq);
213 static int mdt_ck_thread_main(void *args)
215 struct mdt_device *mdt = args;
216 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
217 struct lustre_capa_key *bkey = &mdt->mdt_capa_keys[0],
218 *rkey = &mdt->mdt_capa_keys[1];
219 struct lustre_capa_key *tmp;
221 struct mdt_thread_info *info;
222 struct md_device *next;
223 struct l_wait_info lwi = { 0 };
228 cfs_daemonize_ctxt("mdt_ck");
231 thread_set_flags(thread, SVC_RUNNING);
232 cfs_waitq_signal(&thread->t_ctl_waitq);
234 rc = lu_env_init(&env, LCT_MD_THREAD|LCT_REMEMBER|LCT_NOREF);
238 thread->t_env = &env;
239 env.le_ctx.lc_thread = thread;
240 env.le_ctx.lc_cookie = 0x1;
242 info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
243 LASSERT(info != NULL);
245 tmp = &info->mti_capa_key;
246 mdsnum = mdt_md_site(mdt)->ms_node_id;
248 l_wait_event(thread->t_ctl_waitq,
249 thread_is_stopping(thread) ||
250 thread_is_event(thread),
253 if (thread_is_stopping(thread))
255 thread_clear_flags(thread, SVC_EVENT);
257 if (cfs_time_before(cfs_time_current(), mdt->mdt_ck_expiry))
261 make_capa_key(tmp, mdsnum, rkey->lk_keyid);
263 next = mdt->mdt_child;
264 rc = next->md_ops->mdo_update_capa_key(&env, next, tmp);
266 cfs_spin_lock(&capa_lock);
269 cfs_spin_unlock(&capa_lock);
271 rc = write_capa_keys(&env, mdt, mdt->mdt_capa_keys);
273 cfs_spin_lock(&capa_lock);
275 memset(bkey, 0, sizeof(*bkey));
276 cfs_spin_unlock(&capa_lock);
278 set_capa_key_expiry(mdt);
279 DEBUG_CAPA_KEY(D_SEC, rkey, "new");
283 DEBUG_CAPA_KEY(D_ERROR, rkey, "update failed for");
284 /* next retry is in 300 sec */
285 mdt->mdt_ck_expiry = jiffies + 300 * CFS_HZ;
288 cfs_timer_arm(&mdt->mdt_ck_timer, mdt->mdt_ck_expiry);
289 CDEBUG(D_SEC, "mdt_ck_timer %lu\n", mdt->mdt_ck_expiry);
293 thread_set_flags(thread, SVC_STOPPED);
294 cfs_waitq_signal(&thread->t_ctl_waitq);
298 int mdt_ck_thread_start(struct mdt_device *mdt)
300 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
303 cfs_waitq_init(&thread->t_ctl_waitq);
304 rc = cfs_create_thread(mdt_ck_thread_main, mdt, CFS_DAEMON_FLAGS);
306 CERROR("cannot start mdt_ck thread, rc = %d\n", rc);
310 l_wait_condition(thread->t_ctl_waitq, thread_is_running(thread));
314 void mdt_ck_thread_stop(struct mdt_device *mdt)
316 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
318 if (!thread_is_running(thread))
321 thread_set_flags(thread, SVC_STOPPING);
322 cfs_waitq_signal(&thread->t_ctl_waitq);
323 l_wait_condition(thread->t_ctl_waitq, thread_is_stopped(thread));