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27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
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37 #define DEBUG_SUBSYSTEM S_LOG
40 #include <liblustre.h>
43 #include <obd_class.h>
44 #include <lustre_log.h>
45 #include "llog_internal.h"
47 /* helper functions for calling the llog obd methods */
48 static struct llog_ctxt* llog_new_ctxt(struct obd_device *obd)
50 struct llog_ctxt *ctxt;
57 cfs_atomic_set(&ctxt->loc_refcount, 1);
62 static void llog_ctxt_destroy(struct llog_ctxt *ctxt)
65 class_export_put(ctxt->loc_exp);
69 class_import_put(ctxt->loc_imp);
75 int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt)
77 struct obd_llog_group *olg = ctxt->loc_olg;
78 struct obd_device *obd;
81 spin_lock(&olg->olg_lock);
82 if (!cfs_atomic_dec_and_test(&ctxt->loc_refcount)) {
83 spin_unlock(&olg->olg_lock);
86 olg->olg_ctxts[ctxt->loc_idx] = NULL;
87 spin_unlock(&olg->olg_lock);
90 spin_lock(&obd->obd_dev_lock);
91 /* sync with llog ctxt user thread */
92 spin_unlock(&obd->obd_dev_lock);
94 /* obd->obd_starting is needed for the case of cleanup
95 * in error case while obd is starting up. */
96 LASSERTF(obd->obd_starting == 1 ||
97 obd->obd_stopping == 1 || obd->obd_set_up == 0,
98 "wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
99 !!obd->obd_stopping, !!obd->obd_set_up);
101 /* cleanup the llog ctxt here */
102 if (CTXTP(ctxt, cleanup))
103 rc = CTXTP(ctxt, cleanup)(env, ctxt);
105 llog_ctxt_destroy(ctxt);
106 cfs_waitq_signal(&olg->olg_waitq);
109 EXPORT_SYMBOL(__llog_ctxt_put);
111 int llog_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
113 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
114 struct obd_llog_group *olg;
118 LASSERT(ctxt != NULL);
119 LASSERT(ctxt != LP_POISON);
122 LASSERT(olg != NULL);
123 LASSERT(olg != LP_POISON);
128 * Banlance the ctxt get when calling llog_cleanup()
130 LASSERT(cfs_atomic_read(&ctxt->loc_refcount) < LI_POISON);
131 LASSERT(cfs_atomic_read(&ctxt->loc_refcount) > 1);
135 * Try to free the ctxt.
137 rc = __llog_ctxt_put(env, ctxt);
139 CERROR("Error %d while cleaning up ctxt %p\n",
142 l_wait_event(olg->olg_waitq,
143 llog_group_ctxt_null(olg, idx), &lwi);
147 EXPORT_SYMBOL(llog_cleanup);
149 int llog_setup(const struct lu_env *env, struct obd_device *obd,
150 struct obd_llog_group *olg, int index,
151 struct obd_device *disk_obd, struct llog_operations *op)
153 struct llog_ctxt *ctxt;
157 if (index < 0 || index >= LLOG_MAX_CTXTS)
160 LASSERT(olg != NULL);
162 ctxt = llog_new_ctxt(obd);
168 ctxt->loc_idx = index;
169 ctxt->loc_logops = op;
170 mutex_init(&ctxt->loc_mutex);
171 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
172 ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
174 rc = llog_group_set_ctxt(olg, ctxt, index);
176 llog_ctxt_destroy(ctxt);
178 ctxt = llog_group_get_ctxt(olg, index);
181 * mds_lov_update_desc() might call here multiple
182 * times. So if the llog is already set up then
183 * don't to do it again.
185 CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
186 obd->obd_name, index);
187 LASSERT(ctxt->loc_olg == olg);
188 LASSERT(ctxt->loc_obd == obd);
189 LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
190 LASSERT(ctxt->loc_logops == op);
199 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
202 rc = op->lop_setup(env, obd, olg, index, disk_obd);
206 CERROR("%s: ctxt %d lop_setup=%p failed: rc = %d\n",
207 obd->obd_name, index, op->lop_setup, rc);
208 llog_group_clear_ctxt(olg, index);
209 llog_ctxt_destroy(ctxt);
211 CDEBUG(D_CONFIG, "obd %s ctxt %d is initialized\n",
212 obd->obd_name, index);
213 ctxt->loc_flags &= ~LLOG_CTXT_FLAG_UNINITIALIZED;
218 EXPORT_SYMBOL(llog_setup);
220 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags)
228 if (CTXTP(ctxt, sync))
229 rc = CTXTP(ctxt, sync)(ctxt, exp, flags);
233 EXPORT_SYMBOL(llog_sync);
235 int llog_obd_add(const struct lu_env *env, struct llog_ctxt *ctxt,
236 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
237 struct llog_cookie *logcookies, int numcookies)
247 if (ctxt->loc_flags & LLOG_CTXT_FLAG_UNINITIALIZED)
250 CTXT_CHECK_OP(ctxt, obd_add, -EOPNOTSUPP);
251 raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
253 cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
254 rc = CTXTP(ctxt, obd_add)(env, ctxt, rec, lsm, logcookies,
257 cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
260 EXPORT_SYMBOL(llog_obd_add);
262 int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
263 struct lov_stripe_md *lsm, int count,
264 struct llog_cookie *cookies, int flags)
274 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
275 rc = CTXTP(ctxt, cancel)(env, ctxt, lsm, count, cookies, flags);
278 EXPORT_SYMBOL(llog_cancel);
280 int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
281 struct obd_device *disk_obd, int *index)
285 OBD_CHECK_DT_OP(obd, llog_init, 0);
286 OBD_COUNTER_INCREMENT(obd, llog_init);
288 rc = OBP(obd, llog_init)(obd, olg, disk_obd, index);
291 EXPORT_SYMBOL(obd_llog_init);
293 int obd_llog_finish(struct obd_device *obd, int count)
297 OBD_CHECK_DT_OP(obd, llog_finish, 0);
298 OBD_COUNTER_INCREMENT(obd, llog_finish);
300 rc = OBP(obd, llog_finish)(obd, count);
303 EXPORT_SYMBOL(obd_llog_finish);
305 /* context key constructor/destructor: llog_key_init, llog_key_fini */
306 LU_KEY_INIT_FINI(llog, struct llog_thread_info);
307 /* context key: llog_thread_key */
308 LU_CONTEXT_KEY_DEFINE(llog, LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL);
309 LU_KEY_INIT_GENERIC(llog);
310 EXPORT_SYMBOL(llog_thread_key);
312 int llog_info_init(void)
314 llog_key_init_generic(&llog_thread_key, NULL);
315 lu_context_key_register(&llog_thread_key);
319 void llog_info_fini(void)
321 lu_context_key_degister(&llog_thread_key);