+LttvBdevState *bdev_state_get(LttvTraceState *ts, guint16 devcode)
+{
+ gint devcode_gint = devcode;
+ gpointer bdev = g_hash_table_lookup(ts->bdev_states, &devcode_gint);
+ if(bdev == NULL) {
+ LttvBdevState *bdevstate = g_malloc(sizeof(LttvBdevState));
+ bdevstate->mode_stack = g_array_new(FALSE, FALSE, sizeof(GQuark));
+
+ gint * key = g_malloc(sizeof(gint));
+ *key = devcode;
+ g_hash_table_insert(ts->bdev_states, key, bdevstate);
+ printf("adding key %u to hash table\n", *key);
+
+ bdev = bdevstate;
+ }
+
+ return bdev;
+}
+
+static gboolean bdev_request_issue(void *hook_data, void *call_data)
+{
+ LttvTracefileState *s = (LttvTracefileState *)call_data;
+ LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
+ LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
+ guint8 fac_id = ltt_event_facility_id(e);
+ guint8 ev_id = ltt_event_eventtype_id(e);
+ LttvTraceHookByFacility *thf = (LttvTraceHookByFacility *)hook_data;
+
+ guint major = ltt_event_get_long_unsigned(e, thf->f1);
+ guint minor = ltt_event_get_long_unsigned(e, thf->f2);
+ guint oper = ltt_event_get_long_unsigned(e, thf->f3);
+ guint16 devcode = MKDEV(major,minor);
+
+ /* have we seen this block device before? */
+ gpointer bdev = bdev_state_get(ts, devcode);
+
+ if(oper == 0)
+ bdev_push_mode(bdev, LTTV_BDEV_BUSY_READING);
+ else
+ bdev_push_mode(bdev, LTTV_BDEV_BUSY_WRITING);
+
+ return FALSE;
+}
+
+static gboolean bdev_request_complete(void *hook_data, void *call_data)
+{
+ LttvTracefileState *s = (LttvTracefileState *)call_data;
+ LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
+ LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
+ LttvTraceHookByFacility *thf = (LttvTraceHookByFacility *)hook_data;
+
+ guint major = ltt_event_get_long_unsigned(e, thf->f1);
+ guint minor = ltt_event_get_long_unsigned(e, thf->f2);
+ guint oper = ltt_event_get_long_unsigned(e, thf->f3);
+ guint16 devcode = MKDEV(major,minor);
+
+ /* have we seen this block device before? */
+ gpointer bdev = bdev_state_get(ts, devcode);
+
+ /* update block device */
+ bdev_pop_mode(bdev);
+
+ return FALSE;
+}
+