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37 #define DEBUG_SUBSYSTEM S_LOG
40 #include <obd_class.h>
41 #include <lustre_log.h>
42 #include "llog_internal.h"
44 /* helper functions for calling the llog obd methods */
45 static struct llog_ctxt* llog_new_ctxt(struct obd_device *obd)
47 struct llog_ctxt *ctxt;
54 atomic_set(&ctxt->loc_refcount, 1);
59 static void llog_ctxt_destroy(struct llog_ctxt *ctxt)
62 class_export_put(ctxt->loc_exp);
66 class_import_put(ctxt->loc_imp);
72 int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt)
74 struct obd_llog_group *olg = ctxt->loc_olg;
75 struct obd_device *obd;
78 spin_lock(&olg->olg_lock);
79 if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
80 spin_unlock(&olg->olg_lock);
83 olg->olg_ctxts[ctxt->loc_idx] = NULL;
84 spin_unlock(&olg->olg_lock);
87 spin_lock(&obd->obd_dev_lock);
88 /* sync with llog ctxt user thread */
89 spin_unlock(&obd->obd_dev_lock);
91 /* obd->obd_starting is needed for the case of cleanup
92 * in error case while obd is starting up. */
93 LASSERTF(obd->obd_starting == 1 ||
94 obd->obd_stopping == 1 || obd->obd_set_up == 0,
95 "wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
96 !!obd->obd_stopping, !!obd->obd_set_up);
98 /* cleanup the llog ctxt here */
99 if (CTXTP(ctxt, cleanup))
100 rc = CTXTP(ctxt, cleanup)(env, ctxt);
102 llog_ctxt_destroy(ctxt);
103 wake_up(&olg->olg_waitq);
106 EXPORT_SYMBOL(__llog_ctxt_put);
108 int llog_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
110 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
111 struct obd_llog_group *olg;
115 LASSERT(ctxt != NULL);
116 LASSERT(ctxt != LP_POISON);
119 LASSERT(olg != NULL);
120 LASSERT(olg != LP_POISON);
125 * Banlance the ctxt get when calling llog_cleanup()
127 LASSERT(atomic_read(&ctxt->loc_refcount) < LI_POISON);
128 LASSERT(atomic_read(&ctxt->loc_refcount) > 1);
132 * Try to free the ctxt.
134 rc = __llog_ctxt_put(env, ctxt);
136 CERROR("Error %d while cleaning up ctxt %p\n",
139 l_wait_event(olg->olg_waitq,
140 llog_group_ctxt_null(olg, idx), &lwi);
144 EXPORT_SYMBOL(llog_cleanup);
146 int llog_setup(const struct lu_env *env, struct obd_device *obd,
147 struct obd_llog_group *olg, int index,
148 struct obd_device *disk_obd, struct llog_operations *op)
150 struct llog_ctxt *ctxt;
154 if (index < 0 || index >= LLOG_MAX_CTXTS)
157 LASSERT(olg != NULL);
159 ctxt = llog_new_ctxt(obd);
165 ctxt->loc_idx = index;
166 ctxt->loc_logops = op;
167 mutex_init(&ctxt->loc_mutex);
168 if (disk_obd != NULL)
169 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
171 ctxt->loc_exp = class_export_get(obd->obd_self_export);
173 ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
174 ctxt->loc_chunk_size = LLOG_MIN_CHUNK_SIZE;
176 rc = llog_group_set_ctxt(olg, ctxt, index);
178 llog_ctxt_destroy(ctxt);
180 ctxt = llog_group_get_ctxt(olg, index);
182 CDEBUG(D_CONFIG, "%s: ctxt %d already set up\n",
183 obd->obd_name, index);
184 LASSERT(ctxt->loc_olg == olg);
185 LASSERT(ctxt->loc_obd == obd);
186 if (disk_obd != NULL)
187 LASSERT(ctxt->loc_exp ==
188 disk_obd->obd_self_export);
190 LASSERT(ctxt->loc_exp ==
191 obd->obd_self_export);
192 LASSERT(ctxt->loc_logops == op);
201 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
204 rc = op->lop_setup(env, obd, olg, index, disk_obd);
208 CERROR("%s: ctxt %d lop_setup=%p failed: rc = %d\n",
209 obd->obd_name, index, op->lop_setup, rc);
210 llog_group_clear_ctxt(olg, index);
211 llog_ctxt_destroy(ctxt);
213 CDEBUG(D_CONFIG, "obd %s ctxt %d is initialized\n",
214 obd->obd_name, index);
215 ctxt->loc_flags &= ~LLOG_CTXT_FLAG_UNINITIALIZED;
220 EXPORT_SYMBOL(llog_setup);
222 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags)
230 if (CTXTP(ctxt, sync))
231 rc = CTXTP(ctxt, sync)(ctxt, exp, flags);
235 EXPORT_SYMBOL(llog_sync);
237 int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
238 struct llog_cookie *cookies, int flags)
248 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
249 rc = CTXTP(ctxt, cancel)(env, ctxt, cookies, flags);
252 EXPORT_SYMBOL(llog_cancel);
254 /* context key constructor/destructor: llog_key_init, llog_key_fini */
255 LU_KEY_INIT_FINI(llog, struct llog_thread_info);
256 /* context key: llog_thread_key */
257 LU_CONTEXT_KEY_DEFINE(llog, LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL);
258 LU_KEY_INIT_GENERIC(llog);
260 int llog_info_init(void)
262 llog_key_init_generic(&llog_thread_key, NULL);
263 lu_context_key_register(&llog_thread_key);
267 void llog_info_fini(void)
269 lu_context_key_degister(&llog_thread_key);