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13 * General Public License version 2 for more details (a copy is included
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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2012, 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_capa.c
38 * Lustre Metadata Target (mdt) capability key read/write/update.
40 * Author: Lai Siyao <lsy@clusterfs.com>
44 # define EXPORT_SYMTAB
46 #define DEBUG_SUBSYSTEM S_MDS
48 #include "mdt_internal.h"
50 static inline void set_capa_key_expiry(struct mdt_device *mdt)
52 mdt->mdt_ck_expiry = jiffies + mdt->mdt_ck_timeout * CFS_HZ;
55 static void make_capa_key(struct lustre_capa_key *key,
56 mdsno_t mdsnum, int keyid)
59 key->lk_keyid = keyid + 1;
60 cfs_get_random_bytes(key->lk_key, sizeof(key->lk_key));
63 static inline void lck_cpu_to_le(struct lustre_capa_key *tgt,
64 struct lustre_capa_key *src)
66 tgt->lk_seq = cpu_to_le64(src->lk_seq);
67 tgt->lk_keyid = cpu_to_le32(src->lk_keyid);
68 tgt->lk_padding = cpu_to_le32(src->lk_padding);
69 memcpy(tgt->lk_key, src->lk_key, sizeof(src->lk_key));
72 static inline void lck_le_to_cpu(struct lustre_capa_key *tgt,
73 struct lustre_capa_key *src)
75 tgt->lk_seq = le64_to_cpu(src->lk_seq);
76 tgt->lk_keyid = le32_to_cpu(src->lk_keyid);
77 tgt->lk_padding = le32_to_cpu(src->lk_padding);
78 memcpy(tgt->lk_key, src->lk_key, sizeof(src->lk_key));
81 static int write_capa_keys(const struct lu_env *env,
82 struct mdt_device *mdt,
83 struct lustre_capa_key *keys)
85 struct mdt_thread_info *mti;
86 struct lustre_capa_key *tmp;
91 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
92 th = dt_trans_create(env, mdt->mdt_bottom);
96 rc = dt_declare_record_write(env, mdt->mdt_ck_obj,
97 sizeof(*tmp) * 3, 0, th);
101 rc = dt_trans_start_local(env, mdt->mdt_bottom, th);
105 tmp = &mti->mti_capa_key;
107 for (i = 0; i < 2; i++) {
108 lck_cpu_to_le(tmp, &keys[i]);
110 rc = dt_record_write(env, mdt->mdt_ck_obj,
111 mdt_buf_const(env, tmp, sizeof(*tmp)),
118 dt_trans_stop(env, mdt->mdt_bottom, th);
120 CDEBUG(D_INFO, "write capability keys rc = %d:\n", rc);
124 static int read_capa_keys(const struct lu_env *env,
125 struct mdt_device *mdt,
126 struct lustre_capa_key *keys)
128 struct mdt_thread_info *mti;
129 struct lustre_capa_key *tmp;
133 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
134 tmp = &mti->mti_capa_key;
136 for (i = 0; i < 2; i++) {
137 rc = dt_record_read(env, mdt->mdt_ck_obj,
138 mdt_buf(env, tmp, sizeof(*tmp)), &off);
142 lck_le_to_cpu(&keys[i], tmp);
143 DEBUG_CAPA_KEY(D_SEC, &keys[i], "read");
149 int mdt_capa_keys_init(const struct lu_env *env, struct mdt_device *mdt)
151 struct lustre_capa_key *keys = mdt->mdt_capa_keys;
152 struct mdt_thread_info *mti;
153 struct dt_object *obj;
160 mdsnum = mdt_md_site(mdt)->ms_node_id;
162 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
163 LASSERT(mti != NULL);
164 la = &mti->mti_attr.ma_attr;
166 obj = mdt->mdt_ck_obj;
167 rc = obj->do_ops->do_attr_get(env, mdt->mdt_ck_obj, la, BYPASS_CAPA);
171 size = (unsigned long)la->la_size;
175 for (i = 0; i < 2; i++) {
176 make_capa_key(&keys[i], mdsnum, i);
177 DEBUG_CAPA_KEY(D_SEC, &keys[i], "initializing");
180 rc = write_capa_keys(env, mdt, keys);
182 CERROR("error writing MDS %s: rc %d\n", CAPA_KEYS, rc);
186 rc = read_capa_keys(env, mdt, keys);
188 CERROR("error reading MDS %s: rc %d\n", CAPA_KEYS, rc);
192 set_capa_key_expiry(mdt);
193 cfs_timer_arm(&mdt->mdt_ck_timer, mdt->mdt_ck_expiry);
194 CDEBUG(D_SEC, "mds_ck_timer %lu\n", mdt->mdt_ck_expiry);
198 void mdt_ck_timer_callback(unsigned long castmeharder)
200 struct mdt_device *mdt = (struct mdt_device *)castmeharder;
201 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
204 thread_add_flags(thread, SVC_EVENT);
205 cfs_waitq_signal(&thread->t_ctl_waitq);
209 static int mdt_ck_thread_main(void *args)
211 struct mdt_device *mdt = args;
212 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
213 struct lustre_capa_key *bkey = &mdt->mdt_capa_keys[0],
214 *rkey = &mdt->mdt_capa_keys[1];
215 struct lustre_capa_key *tmp;
217 struct mdt_thread_info *info;
218 struct md_device *next;
219 struct l_wait_info lwi = { 0 };
224 cfs_daemonize_ctxt("mdt_ck");
227 thread_set_flags(thread, SVC_RUNNING);
228 cfs_waitq_signal(&thread->t_ctl_waitq);
230 rc = lu_env_init(&env, LCT_MD_THREAD|LCT_REMEMBER|LCT_NOREF);
234 thread->t_env = &env;
235 env.le_ctx.lc_thread = thread;
236 env.le_ctx.lc_cookie = 0x1;
238 info = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
239 LASSERT(info != NULL);
241 tmp = &info->mti_capa_key;
242 mdsnum = mdt_md_site(mdt)->ms_node_id;
244 l_wait_event(thread->t_ctl_waitq,
245 thread_is_stopping(thread) ||
246 thread_is_event(thread),
249 if (thread_is_stopping(thread))
251 thread_clear_flags(thread, SVC_EVENT);
253 if (cfs_time_before(cfs_time_current(), mdt->mdt_ck_expiry))
257 make_capa_key(tmp, mdsnum, rkey->lk_keyid);
259 next = mdt->mdt_child;
260 rc = next->md_ops->mdo_update_capa_key(&env, next, tmp);
262 cfs_spin_lock(&capa_lock);
265 cfs_spin_unlock(&capa_lock);
267 rc = write_capa_keys(&env, mdt, mdt->mdt_capa_keys);
269 cfs_spin_lock(&capa_lock);
271 memset(bkey, 0, sizeof(*bkey));
272 cfs_spin_unlock(&capa_lock);
274 set_capa_key_expiry(mdt);
275 DEBUG_CAPA_KEY(D_SEC, rkey, "new");
279 DEBUG_CAPA_KEY(D_ERROR, rkey, "update failed for");
280 /* next retry is in 300 sec */
281 mdt->mdt_ck_expiry = jiffies + 300 * CFS_HZ;
284 cfs_timer_arm(&mdt->mdt_ck_timer, mdt->mdt_ck_expiry);
285 CDEBUG(D_SEC, "mdt_ck_timer %lu\n", mdt->mdt_ck_expiry);
289 thread_set_flags(thread, SVC_STOPPED);
290 cfs_waitq_signal(&thread->t_ctl_waitq);
294 int mdt_ck_thread_start(struct mdt_device *mdt)
296 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
299 cfs_waitq_init(&thread->t_ctl_waitq);
300 rc = cfs_create_thread(mdt_ck_thread_main, mdt, CFS_DAEMON_FLAGS);
302 CERROR("cannot start mdt_ck thread, rc = %d\n", rc);
306 l_wait_condition(thread->t_ctl_waitq, thread_is_running(thread));
310 void mdt_ck_thread_stop(struct mdt_device *mdt)
312 struct ptlrpc_thread *thread = &mdt->mdt_ck_thread;
314 if (!thread_is_running(thread))
317 thread_set_flags(thread, SVC_STOPPING);
318 cfs_waitq_signal(&thread->t_ctl_waitq);
319 l_wait_condition(thread->t_ctl_waitq, thread_is_stopped(thread));