25 	struct tty_audit_buf *buf;  in tty_audit_buf_ref()  local
27 	buf = current->signal->tty_audit_buf;  in tty_audit_buf_ref()
28 	WARN_ON(buf == ERR_PTR(-ESRCH));  in tty_audit_buf_ref()
29 	return buf;  in tty_audit_buf_ref()
34 	struct tty_audit_buf *buf;  in tty_audit_buf_alloc()  local
36 	buf = kzalloc(sizeof(*buf), GFP_KERNEL);  in tty_audit_buf_alloc()
37 	if (!buf)  in tty_audit_buf_alloc()
40 	buf->data = kmalloc(N_TTY_BUF_SIZE, GFP_KERNEL);  in tty_audit_buf_alloc()
41 	if (!buf->data)  in tty_audit_buf_alloc()
44 	mutex_init(&buf->mutex);  in tty_audit_buf_alloc()
46 	return buf;  in tty_audit_buf_alloc()
49 	kfree(buf);  in tty_audit_buf_alloc()
54 static void tty_audit_buf_free(struct tty_audit_buf *buf)  in tty_audit_buf_free()  argument
56 	WARN_ON(buf->valid != 0);  in tty_audit_buf_free()
57 	kfree(buf->data);  in tty_audit_buf_free()
58 	kfree(buf);  in tty_audit_buf_free()
91 static void tty_audit_buf_push(struct tty_audit_buf *buf)  in tty_audit_buf_push()  argument
93 	if (buf->valid == 0)  in tty_audit_buf_push()
96 		buf->valid = 0;  in tty_audit_buf_push()
99 	tty_audit_log("tty", buf->dev, buf->data, buf->valid);  in tty_audit_buf_push()
100 	buf->valid = 0;  in tty_audit_buf_push()
114 	struct tty_audit_buf *buf;  in tty_audit_exit()  local
116 	buf = xchg(&current->signal->tty_audit_buf, ERR_PTR(-ESRCH));  in tty_audit_exit()
117 	if (!buf)  in tty_audit_exit()
120 	tty_audit_buf_push(buf);  in tty_audit_exit()
121 	tty_audit_buf_free(buf);  in tty_audit_exit()
156 	struct tty_audit_buf *buf;  in tty_audit_push()  local
161 	buf = tty_audit_buf_ref();  in tty_audit_push()
162 	if (!IS_ERR_OR_NULL(buf)) {  in tty_audit_push()
163 		mutex_lock(&buf->mutex);  in tty_audit_push()
164 		tty_audit_buf_push(buf);  in tty_audit_push()
165 		mutex_unlock(&buf->mutex);  in tty_audit_push()
179 	struct tty_audit_buf *buf;  in tty_audit_buf_get()  local
181 	buf = tty_audit_buf_ref();  in tty_audit_buf_get()
182 	if (buf)  in tty_audit_buf_get()
183 		return buf;  in tty_audit_buf_get()
185 	buf = tty_audit_buf_alloc();  in tty_audit_buf_get()
186 	if (buf == NULL) {  in tty_audit_buf_get()
192 	if (cmpxchg(&current->signal->tty_audit_buf, NULL, buf) != NULL)  in tty_audit_buf_get()
193 		tty_audit_buf_free(buf);  in tty_audit_buf_get()
205 	struct tty_audit_buf *buf;  in tty_audit_add_data()  local
224 	buf = tty_audit_buf_get();  in tty_audit_add_data()
225 	if (IS_ERR_OR_NULL(buf))  in tty_audit_add_data()
228 	mutex_lock(&buf->mutex);  in tty_audit_add_data()
230 	if (buf->dev != dev || buf->icanon != icanon) {  in tty_audit_add_data()
231 		tty_audit_buf_push(buf);  in tty_audit_add_data()
232 		buf->dev = dev;  in tty_audit_add_data()
233 		buf->icanon = icanon;  in tty_audit_add_data()
238 		run = N_TTY_BUF_SIZE - buf->valid;  in tty_audit_add_data()
241 		memcpy(buf->data + buf->valid, data, run);  in tty_audit_add_data()
242 		buf->valid += run;  in tty_audit_add_data()
245 		if (buf->valid == N_TTY_BUF_SIZE)  in tty_audit_add_data()
246 			tty_audit_buf_push(buf);  in tty_audit_add_data()
248 	mutex_unlock(&buf->mutex);  in tty_audit_add_data()