84 static struct mon_buf *monwrite_find_hdr(struct mon_private *monpriv,  in monwrite_find_hdr()  argument
89 	list_for_each_entry_safe(entry, next, &monpriv->list, list)  in monwrite_find_hdr()
102 static int monwrite_new_hdr(struct mon_private *monpriv)  in monwrite_new_hdr()  argument
104 	struct monwrite_hdr *monhdr = &monpriv->hdr;  in monwrite_new_hdr()
114 		monbuf = monwrite_find_hdr(monpriv, monhdr);  in monwrite_new_hdr()
139 		list_add_tail(&monbuf->list, &monpriv->list);  in monwrite_new_hdr()
143 	monpriv->current_buf = monbuf;  in monwrite_new_hdr()
147 static int monwrite_new_data(struct mon_private *monpriv)  in monwrite_new_data()  argument
149 	struct monwrite_hdr *monhdr = &monpriv->hdr;  in monwrite_new_data()
150 	struct mon_buf *monbuf = monpriv->current_buf;  in monwrite_new_data()
171 		list_del(&monpriv->current_buf->list);  in monwrite_new_data()
172 		kfree(monpriv->current_buf->data);  in monwrite_new_data()
173 		kfree(monpriv->current_buf);  in monwrite_new_data()
174 		monpriv->current_buf = NULL;  in monwrite_new_data()
189 	struct mon_private *monpriv;  in monwrite_open()  local
191 	monpriv = kzalloc(sizeof(struct mon_private), GFP_KERNEL);  in monwrite_open()
192 	if (!monpriv)  in monwrite_open()
194 	INIT_LIST_HEAD(&monpriv->list);  in monwrite_open()
195 	monpriv->hdr_to_read = sizeof(monpriv->hdr);  in monwrite_open()
196 	mutex_init(&monpriv->thread_mutex);  in monwrite_open()
197 	filp->private_data = monpriv;  in monwrite_open()
203 	struct mon_private *monpriv = filp->private_data;  in monwrite_close()  local
206 	list_for_each_entry_safe(entry, next, &monpriv->list, list) {  in monwrite_close()
215 	kfree(monpriv);  in monwrite_close()
222 	struct mon_private *monpriv = filp->private_data;  in monwrite_write()  local
227 	mutex_lock(&monpriv->thread_mutex);  in monwrite_write()
229 		if (monpriv->hdr_to_read) {  in monwrite_write()
230 			len = min(count - written, monpriv->hdr_to_read);  in monwrite_write()
231 			to = (char *) &monpriv->hdr +  in monwrite_write()
232 				sizeof(monpriv->hdr) - monpriv->hdr_to_read;  in monwrite_write()
237 			monpriv->hdr_to_read -= len;  in monwrite_write()
239 			if (monpriv->hdr_to_read > 0)  in monwrite_write()
241 			rc = monwrite_new_hdr(monpriv);  in monwrite_write()
244 			monpriv->data_to_read = monpriv->current_buf ?  in monwrite_write()
245 				monpriv->current_buf->hdr.datalen : 0;  in monwrite_write()
248 		if (monpriv->data_to_read) {  in monwrite_write()
249 			len = min(count - written, monpriv->data_to_read);  in monwrite_write()
250 			to = monpriv->current_buf->data +  in monwrite_write()
251 				monpriv->hdr.datalen - monpriv->data_to_read;  in monwrite_write()
256 			monpriv->data_to_read -= len;  in monwrite_write()
258 			if (monpriv->data_to_read > 0)  in monwrite_write()
260 			rc = monwrite_new_data(monpriv);  in monwrite_write()
264 		monpriv->hdr_to_read = sizeof(monpriv->hdr);  in monwrite_write()
266 	mutex_unlock(&monpriv->thread_mutex);  in monwrite_write()
270 	monpriv->data_to_read = 0;  in monwrite_write()
271 	monpriv->hdr_to_read = sizeof(struct monwrite_hdr);  in monwrite_write()
272 	mutex_unlock(&monpriv->thread_mutex);  in monwrite_write()