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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LOG
36 #include <obd_class.h>
37 #include <lustre_log.h>
38 #include "llog_internal.h"
40 /* helper functions for calling the llog obd methods */
41 static struct llog_ctxt* llog_new_ctxt(struct obd_device *obd)
43 struct llog_ctxt *ctxt;
50 atomic_set(&ctxt->loc_refcount, 1);
55 static void llog_ctxt_destroy(struct llog_ctxt *ctxt)
58 class_export_put(ctxt->loc_exp);
62 class_import_put(ctxt->loc_imp);
68 int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt)
70 struct obd_llog_group *olg = ctxt->loc_olg;
71 struct obd_device *obd;
74 spin_lock(&olg->olg_lock);
75 if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
76 spin_unlock(&olg->olg_lock);
79 olg->olg_ctxts[ctxt->loc_idx] = NULL;
80 spin_unlock(&olg->olg_lock);
83 spin_lock(&obd->obd_dev_lock);
84 /* sync with llog ctxt user thread */
85 spin_unlock(&obd->obd_dev_lock);
87 /* obd->obd_starting is needed for the case of cleanup
88 * in error case while obd is starting up. */
89 LASSERTF(obd->obd_starting == 1 ||
90 obd->obd_stopping == 1 || obd->obd_set_up == 0,
91 "wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
92 !!obd->obd_stopping, !!obd->obd_set_up);
94 /* cleanup the llog ctxt here */
95 if (CTXTP(ctxt, cleanup))
96 rc = CTXTP(ctxt, cleanup)(env, ctxt);
98 llog_ctxt_destroy(ctxt);
99 wake_up(&olg->olg_waitq);
102 EXPORT_SYMBOL(__llog_ctxt_put);
104 int llog_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
106 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
107 struct obd_llog_group *olg;
111 LASSERT(ctxt != NULL);
112 LASSERT(ctxt != LP_POISON);
115 LASSERT(olg != NULL);
116 LASSERT(olg != LP_POISON);
121 * Banlance the ctxt get when calling llog_cleanup()
123 LASSERT(atomic_read(&ctxt->loc_refcount) < LI_POISON);
124 LASSERT(atomic_read(&ctxt->loc_refcount) > 1);
128 * Try to free the ctxt.
130 rc = __llog_ctxt_put(env, ctxt);
132 CERROR("Error %d while cleaning up ctxt %p\n",
135 l_wait_event(olg->olg_waitq,
136 llog_group_ctxt_null(olg, idx), &lwi);
140 EXPORT_SYMBOL(llog_cleanup);
142 int llog_setup(const struct lu_env *env, struct obd_device *obd,
143 struct obd_llog_group *olg, int index,
144 struct obd_device *disk_obd, struct llog_operations *op)
146 struct llog_ctxt *ctxt;
150 if (index < 0 || index >= LLOG_MAX_CTXTS)
153 LASSERT(olg != NULL);
155 ctxt = llog_new_ctxt(obd);
161 ctxt->loc_idx = index;
162 ctxt->loc_logops = op;
163 mutex_init(&ctxt->loc_mutex);
164 if (disk_obd != NULL)
165 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
167 ctxt->loc_exp = class_export_get(obd->obd_self_export);
169 ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
170 ctxt->loc_chunk_size = LLOG_MIN_CHUNK_SIZE;
172 rc = llog_group_set_ctxt(olg, ctxt, index);
174 llog_ctxt_destroy(ctxt);
176 ctxt = llog_group_get_ctxt(olg, index);
178 CDEBUG(D_CONFIG, "%s: ctxt %d already set up\n",
179 obd->obd_name, index);
180 LASSERT(ctxt->loc_olg == olg);
181 LASSERT(ctxt->loc_obd == obd);
182 if (disk_obd != NULL)
183 LASSERT(ctxt->loc_exp ==
184 disk_obd->obd_self_export);
186 LASSERT(ctxt->loc_exp ==
187 obd->obd_self_export);
188 LASSERT(ctxt->loc_logops == op);
197 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
200 rc = op->lop_setup(env, obd, olg, index, disk_obd);
204 CERROR("%s: ctxt %d lop_setup=%p failed: rc = %d\n",
205 obd->obd_name, index, op->lop_setup, rc);
206 llog_group_clear_ctxt(olg, index);
207 llog_ctxt_destroy(ctxt);
209 CDEBUG(D_CONFIG, "obd %s ctxt %d is initialized\n",
210 obd->obd_name, index);
211 ctxt->loc_flags &= ~LLOG_CTXT_FLAG_UNINITIALIZED;
216 EXPORT_SYMBOL(llog_setup);
218 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags)
226 if (CTXTP(ctxt, sync))
227 rc = CTXTP(ctxt, sync)(ctxt, exp, flags);
231 EXPORT_SYMBOL(llog_sync);
233 int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
234 struct llog_cookie *cookies, int flags)
244 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
245 rc = CTXTP(ctxt, cancel)(env, ctxt, cookies, flags);
248 EXPORT_SYMBOL(llog_cancel);
250 /* context key constructor/destructor: llog_key_init, llog_key_fini */
251 LU_KEY_INIT_FINI(llog, struct llog_thread_info);
252 /* context key: llog_thread_key */
253 LU_CONTEXT_KEY_DEFINE(llog, LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL);
254 LU_KEY_INIT_GENERIC(llog);
256 int llog_info_init(void)
258 llog_key_init_generic(&llog_thread_key, NULL);
259 lu_context_key_register(&llog_thread_key);
263 void llog_info_fini(void)
265 lu_context_key_degister(&llog_thread_key);