41 static char *batadv_log_char_addr(struct batadv_priv_debug_log *debug_log,  in batadv_log_char_addr()  argument
44 	return &debug_log->log_buff[idx & BATADV_LOG_BUFF_MASK];  in batadv_log_char_addr()
47 static void batadv_emit_log_char(struct batadv_priv_debug_log *debug_log,  in batadv_emit_log_char()  argument
52 	char_addr = batadv_log_char_addr(debug_log, debug_log->log_end);  in batadv_emit_log_char()
54 	debug_log->log_end++;  in batadv_emit_log_char()
56 	if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len)  in batadv_emit_log_char()
57 		debug_log->log_start = debug_log->log_end - batadv_log_buff_len;  in batadv_emit_log_char()
61 static int batadv_fdebug_log(struct batadv_priv_debug_log *debug_log,  in batadv_fdebug_log()  argument
68 	if (!debug_log)  in batadv_fdebug_log()
71 	spin_lock_bh(&debug_log->lock);  in batadv_fdebug_log()
77 		batadv_emit_log_char(debug_log, *p);  in batadv_fdebug_log()
79 	spin_unlock_bh(&debug_log->lock);  in batadv_fdebug_log()
81 	wake_up(&debug_log->queue_wait);  in batadv_fdebug_log()
93 	batadv_fdebug_log(bat_priv->debug_log, "[%10u] %s",  in batadv_debug_log()
116 static int batadv_log_empty(struct batadv_priv_debug_log *debug_log)  in batadv_log_empty()  argument
118 	return !(debug_log->log_start - debug_log->log_end);  in batadv_log_empty()
125 	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;  in batadv_log_read()  local
130 	if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log))  in batadv_log_read()
142 	error = wait_event_interruptible(debug_log->queue_wait,  in batadv_log_read()
143 					 (!batadv_log_empty(debug_log)));  in batadv_log_read()
148 	spin_lock_bh(&debug_log->lock);  in batadv_log_read()
151 	       (debug_log->log_start != debug_log->log_end)) {  in batadv_log_read()
152 		char_addr = batadv_log_char_addr(debug_log,  in batadv_log_read()
153 						 debug_log->log_start);  in batadv_log_read()
156 		debug_log->log_start++;  in batadv_log_read()
158 		spin_unlock_bh(&debug_log->lock);  in batadv_log_read()
162 		spin_lock_bh(&debug_log->lock);  in batadv_log_read()
168 	spin_unlock_bh(&debug_log->lock);  in batadv_log_read()
179 	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;  in batadv_log_poll()  local
181 	poll_wait(file, &debug_log->queue_wait, wait);  in batadv_log_poll()
183 	if (!batadv_log_empty(debug_log))  in batadv_log_poll()
204 	bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);  in batadv_debug_log_setup()
205 	if (!bat_priv->debug_log)  in batadv_debug_log_setup()
208 	spin_lock_init(&bat_priv->debug_log->lock);  in batadv_debug_log_setup()
209 	init_waitqueue_head(&bat_priv->debug_log->queue_wait);  in batadv_debug_log_setup()
225 	kfree(bat_priv->debug_log);  in batadv_debug_log_cleanup()
226 	bat_priv->debug_log = NULL;  in batadv_debug_log_cleanup()