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27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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34 * Lustre is a trademark of Sun Microsystems, Inc.
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);
72 LASSERT(ctxt->loc_llcd == NULL);
76 int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt)
78 struct obd_llog_group *olg = ctxt->loc_olg;
79 struct obd_device *obd;
82 cfs_spin_lock(&olg->olg_lock);
83 if (!cfs_atomic_dec_and_test(&ctxt->loc_refcount)) {
84 cfs_spin_unlock(&olg->olg_lock);
87 olg->olg_ctxts[ctxt->loc_idx] = NULL;
88 cfs_spin_unlock(&olg->olg_lock);
91 lcm_put(ctxt->loc_lcm);
94 cfs_spin_lock(&obd->obd_dev_lock);
95 /* sync with llog ctxt user thread */
96 cfs_spin_unlock(&obd->obd_dev_lock);
98 /* obd->obd_starting is needed for the case of cleanup
99 * in error case while obd is starting up. */
100 LASSERTF(obd->obd_starting == 1 ||
101 obd->obd_stopping == 1 || obd->obd_set_up == 0,
102 "wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
103 !!obd->obd_stopping, !!obd->obd_set_up);
105 /* cleanup the llog ctxt here */
106 if (CTXTP(ctxt, cleanup))
107 rc = CTXTP(ctxt, cleanup)(env, ctxt);
109 llog_ctxt_destroy(ctxt);
110 cfs_waitq_signal(&olg->olg_waitq);
113 EXPORT_SYMBOL(__llog_ctxt_put);
115 int llog_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
117 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
118 struct obd_llog_group *olg;
122 LASSERT(ctxt != NULL);
123 LASSERT(ctxt != LP_POISON);
126 LASSERT(olg != NULL);
127 LASSERT(olg != LP_POISON);
132 * Banlance the ctxt get when calling llog_cleanup()
134 LASSERT(cfs_atomic_read(&ctxt->loc_refcount) < LI_POISON);
135 LASSERT(cfs_atomic_read(&ctxt->loc_refcount) > 1);
139 * Try to free the ctxt.
141 rc = __llog_ctxt_put(env, ctxt);
143 CERROR("Error %d while cleaning up ctxt %p\n",
146 l_wait_event(olg->olg_waitq,
147 llog_group_ctxt_null(olg, idx), &lwi);
151 EXPORT_SYMBOL(llog_cleanup);
153 int llog_setup(const struct lu_env *env, struct obd_device *obd,
154 struct obd_llog_group *olg, int index,
155 struct obd_device *disk_obd, struct llog_operations *op)
157 struct llog_ctxt *ctxt;
161 if (index < 0 || index >= LLOG_MAX_CTXTS)
164 LASSERT(olg != NULL);
166 ctxt = llog_new_ctxt(obd);
172 ctxt->loc_idx = index;
173 ctxt->loc_logops = op;
174 cfs_mutex_init(&ctxt->loc_mutex);
175 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
176 ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
178 rc = llog_group_set_ctxt(olg, ctxt, index);
180 llog_ctxt_destroy(ctxt);
182 ctxt = llog_group_get_ctxt(olg, index);
185 * mds_lov_update_desc() might call here multiple
186 * times. So if the llog is already set up then
187 * don't to do it again.
189 CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
190 obd->obd_name, index);
191 LASSERT(ctxt->loc_olg == olg);
192 LASSERT(ctxt->loc_obd == obd);
193 LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
194 LASSERT(ctxt->loc_logops == op);
203 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
206 rc = op->lop_setup(env, obd, olg, index, disk_obd);
210 CERROR("%s: ctxt %d lop_setup=%p failed: rc = %d\n",
211 obd->obd_name, index, op->lop_setup, rc);
212 llog_group_clear_ctxt(olg, index);
213 llog_ctxt_destroy(ctxt);
215 CDEBUG(D_CONFIG, "obd %s ctxt %d is initialized\n",
216 obd->obd_name, index);
217 ctxt->loc_flags &= ~LLOG_CTXT_FLAG_UNINITIALIZED;
222 EXPORT_SYMBOL(llog_setup);
224 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags)
232 if (CTXTP(ctxt, sync))
233 rc = CTXTP(ctxt, sync)(ctxt, exp, flags);
237 EXPORT_SYMBOL(llog_sync);
239 int llog_obd_add(const struct lu_env *env, struct llog_ctxt *ctxt,
240 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
241 struct llog_cookie *logcookies, int numcookies)
251 if (ctxt->loc_flags & LLOG_CTXT_FLAG_UNINITIALIZED)
254 CTXT_CHECK_OP(ctxt, obd_add, -EOPNOTSUPP);
255 raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
257 cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
258 rc = CTXTP(ctxt, obd_add)(env, ctxt, rec, lsm, logcookies,
261 cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
264 EXPORT_SYMBOL(llog_obd_add);
266 int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
267 struct lov_stripe_md *lsm, int count,
268 struct llog_cookie *cookies, int flags)
278 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
279 rc = CTXTP(ctxt, cancel)(env, ctxt, lsm, count, cookies, flags);
282 EXPORT_SYMBOL(llog_cancel);
284 /* add for obdfilter/sz and mds/unlink */
285 int llog_obd_origin_add(const struct lu_env *env, struct llog_ctxt *ctxt,
286 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
287 struct llog_cookie *logcookies, int numcookies)
289 struct llog_handle *cathandle;
293 cathandle = ctxt->loc_handle;
294 LASSERT(cathandle != NULL);
295 rc = llog_cat_add(env, cathandle, rec, logcookies, NULL);
296 if (rc != 0 && rc != 1)
297 CERROR("write one catalog record failed: %d\n", rc);
300 EXPORT_SYMBOL(llog_obd_origin_add);
302 int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
303 struct obd_device *disk_obd, int *index)
307 OBD_CHECK_DT_OP(obd, llog_init, 0);
308 OBD_COUNTER_INCREMENT(obd, llog_init);
310 rc = OBP(obd, llog_init)(obd, olg, disk_obd, index);
313 EXPORT_SYMBOL(obd_llog_init);
315 int obd_llog_finish(struct obd_device *obd, int count)
319 OBD_CHECK_DT_OP(obd, llog_finish, 0);
320 OBD_COUNTER_INCREMENT(obd, llog_finish);
322 rc = OBP(obd, llog_finish)(obd, count);
325 EXPORT_SYMBOL(obd_llog_finish);
327 /* context key constructor/destructor: llog_key_init, llog_key_fini */
328 LU_KEY_INIT_FINI(llog, struct llog_thread_info);
329 /* context key: llog_thread_key */
330 LU_CONTEXT_KEY_DEFINE(llog, LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL);
331 LU_KEY_INIT_GENERIC(llog);
332 EXPORT_SYMBOL(llog_thread_key);
334 int llog_info_init(void)
336 llog_key_init_generic(&llog_thread_key, NULL);
337 lu_context_key_register(&llog_thread_key);
341 void llog_info_fini(void)
343 lu_context_key_degister(&llog_thread_key);