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,
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12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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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.
32 * Copyright (c) 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * lustre/mdt/mdt_capa.c
40 * Lustre Metadata Target (mdt) capability key read/write/update.
42 * Author: Lai Siyao <lsy@clusterfs.com>
46 # define EXPORT_SYMTAB
48 #define DEBUG_SUBSYSTEM S_MDS
50 #include "mdt_internal.h"
52 static inline void set_capa_key_expiry(struct mdt_device *mdt)
54 mdt->mdt_ck_expiry = jiffies + mdt->mdt_ck_timeout * CFS_HZ;
57 static void make_capa_key(struct lustre_capa_key *key,
58 mdsno_t mdsnum, int keyid)
61 key->lk_keyid = keyid + 1;
62 cfs_get_random_bytes(key->lk_key, sizeof(key->lk_key));
65 static inline void lck_cpu_to_le(struct lustre_capa_key *tgt,
66 struct lustre_capa_key *src)
68 tgt->lk_seq = cpu_to_le64(src->lk_seq);
69 tgt->lk_keyid = cpu_to_le32(src->lk_keyid);
70 tgt->lk_padding = cpu_to_le32(src->lk_padding);
71 memcpy(tgt->lk_key, src->lk_key, sizeof(src->lk_key));
74 static inline void lck_le_to_cpu(struct lustre_capa_key *tgt,
75 struct lustre_capa_key *src)
77 tgt->lk_seq = le64_to_cpu(src->lk_seq);
78 tgt->lk_keyid = le32_to_cpu(src->lk_keyid);
79 tgt->lk_padding = le32_to_cpu(src->lk_padding);
80 memcpy(tgt->lk_key, src->lk_key, sizeof(src->lk_key));
83 static int write_capa_keys(const struct lu_env *env,
84 struct mdt_device *mdt,
85 struct lustre_capa_key *keys)
87 struct mdt_thread_info *mti;
88 struct lustre_capa_key *tmp;
93 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
94 th = mdt_trans_create(env, mdt);
98 rc = dt_declare_record_write(env, mdt->mdt_ck_obj,
99 sizeof(*tmp) * 3, 0, th);
103 rc = mdt_trans_start(env, mdt, th);
107 tmp = &mti->mti_capa_key;
109 for (i = 0; i < 2; i++) {
110 lck_cpu_to_le(tmp, &keys[i]);
112 rc = dt_record_write(env, mdt->mdt_ck_obj,
113 mdt_buf_const(env, tmp, sizeof(*tmp)),
120 mdt_trans_stop(env, mdt, th);
122 CDEBUG(D_INFO, "write capability keys rc = %d:\n", rc);
126 static int read_capa_keys(const struct lu_env *env,
127 struct mdt_device *mdt,
128 struct lustre_capa_key *keys)
130 struct mdt_thread_info *mti;
131 struct lustre_capa_key *tmp;
135 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
136 tmp = &mti->mti_capa_key;
138 for (i = 0; i < 2; i++) {
139 rc = dt_record_read(env, mdt->mdt_ck_obj,
140 mdt_buf(env, tmp, sizeof(*tmp)), &off);
144 lck_le_to_cpu(&keys[i], tmp);
145 DEBUG_CAPA_KEY(D_SEC, &keys[i], "read");
151 int mdt_capa_keys_init(const struct lu_env *env, struct mdt_device *mdt)
153 struct lustre_capa_key *keys = mdt->mdt_capa_keys;
154 struct mdt_thread_info *mti;
155 struct dt_object *obj;
162 mdsnum = mdt_md_site(mdt)->ms_node_id;
164 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
165 LASSERT(mti != NULL);
166 la = &mti->mti_attr.ma_attr;
168 obj = mdt->mdt_ck_obj;
169 rc = obj->do_ops->do_attr_get(env, mdt->mdt_ck_obj, la, BYPASS_CAPA);
173 size = (unsigned long)la->la_size;
177 for (i = 0; i < 2; i++) {
178 make_capa_key(&keys[i], mdsnum, i);
179 DEBUG_CAPA_KEY(D_SEC, &keys[i], "initializing");
182 rc = write_capa_keys(env, mdt, keys);
184 CERROR("error writing MDS %s: rc %d\n", CAPA_KEYS, rc);
188 rc = read_capa_keys(env, mdt, keys);
190 CERROR("error reading MDS %s: rc %d\n", CAPA_KEYS, rc);
194 set_capa_key_expiry(mdt);
195 cfs_timer_arm(&mdt->mdt_ck_timer, mdt->mdt_ck_expiry);
196 CDEBUG(D_SEC, "mds_ck_timer %lu\n", mdt->mdt_ck_expiry);
200 void mdt_ck_timer_callback(unsigned long castmeharder)
202 struct mdt_device *mdt = (struct mdt_device *)castmeharder;
203 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
206 thread_add_flags(thread, SVC_EVENT);
207 cfs_waitq_signal(&thread->t_ctl_waitq);
211 static int mdt_ck_thread_main(void *args)
213 struct mdt_device *mdt = args;
214 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
215 struct lustre_capa_key *bkey = &mdt->mdt_capa_keys[0],
216 *rkey = &mdt->mdt_capa_keys[1];
217 struct lustre_capa_key *tmp;
219 struct mdt_thread_info *info;
220 struct md_device *next;
221 struct l_wait_info lwi = { 0 };
226 cfs_daemonize_ctxt("mdt_ck");
229 thread_set_flags(thread, SVC_RUNNING);
230 cfs_waitq_signal(&thread->t_ctl_waitq);
232 rc = lu_env_init(&env, LCT_MD_THREAD|LCT_REMEMBER|LCT_NOREF);
236 thread->t_env = &env;
237 env.le_ctx.lc_thread = thread;
238 env.le_ctx.lc_cookie = 0x1;
240 info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
241 LASSERT(info != NULL);
243 tmp = &info->mti_capa_key;
244 mdsnum = mdt_md_site(mdt)->ms_node_id;
246 l_wait_event(thread->t_ctl_waitq,
247 thread_is_stopping(thread) ||
248 thread_is_event(thread),
251 if (thread_is_stopping(thread))
253 thread_clear_flags(thread, SVC_EVENT);
255 if (cfs_time_before(cfs_time_current(), mdt->mdt_ck_expiry))
259 make_capa_key(tmp, mdsnum, rkey->lk_keyid);
261 next = mdt->mdt_child;
262 rc = next->md_ops->mdo_update_capa_key(&env, next, tmp);
264 cfs_spin_lock(&capa_lock);
267 cfs_spin_unlock(&capa_lock);
269 rc = write_capa_keys(&env, mdt, mdt->mdt_capa_keys);
271 cfs_spin_lock(&capa_lock);
273 memset(bkey, 0, sizeof(*bkey));
274 cfs_spin_unlock(&capa_lock);
276 set_capa_key_expiry(mdt);
277 DEBUG_CAPA_KEY(D_SEC, rkey, "new");
281 DEBUG_CAPA_KEY(D_ERROR, rkey, "update failed for");
282 /* next retry is in 300 sec */
283 mdt->mdt_ck_expiry = jiffies + 300 * CFS_HZ;
286 cfs_timer_arm(&mdt->mdt_ck_timer, mdt->mdt_ck_expiry);
287 CDEBUG(D_SEC, "mdt_ck_timer %lu\n", mdt->mdt_ck_expiry);
291 thread_set_flags(thread, SVC_STOPPED);
292 cfs_waitq_signal(&thread->t_ctl_waitq);
296 int mdt_ck_thread_start(struct mdt_device *mdt)
298 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
301 cfs_waitq_init(&thread->t_ctl_waitq);
302 rc = cfs_create_thread(mdt_ck_thread_main, mdt, CFS_DAEMON_FLAGS);
304 CERROR("cannot start mdt_ck thread, rc = %d\n", rc);
308 l_wait_condition(thread->t_ctl_waitq, thread_is_running(thread));
312 void mdt_ck_thread_stop(struct mdt_device *mdt)
314 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
316 if (!thread_is_running(thread))
319 thread_set_flags(thread, SVC_STOPPING);
320 cfs_waitq_signal(&thread->t_ctl_waitq);
321 l_wait_condition(thread->t_ctl_waitq, thread_is_stopped(thread));