28 	struct tty_audit_buf *buf;  in tty_audit_buf_alloc()  local
30 	buf = kmalloc(sizeof(*buf), GFP_KERNEL);  in tty_audit_buf_alloc()
31 	if (!buf)  in tty_audit_buf_alloc()
33 	buf->data = kmalloc(N_TTY_BUF_SIZE, GFP_KERNEL);  in tty_audit_buf_alloc()
34 	if (!buf->data)  in tty_audit_buf_alloc()
36 	atomic_set(&buf->count, 1);  in tty_audit_buf_alloc()
37 	mutex_init(&buf->mutex);  in tty_audit_buf_alloc()
38 	buf->major = major;  in tty_audit_buf_alloc()
39 	buf->minor = minor;  in tty_audit_buf_alloc()
40 	buf->icanon = icanon;  in tty_audit_buf_alloc()
41 	buf->valid = 0;  in tty_audit_buf_alloc()
42 	return buf;  in tty_audit_buf_alloc()
45 	kfree(buf);  in tty_audit_buf_alloc()
50 static void tty_audit_buf_free(struct tty_audit_buf *buf)  in tty_audit_buf_free()  argument
52 	WARN_ON(buf->valid != 0);  in tty_audit_buf_free()
53 	kfree(buf->data);  in tty_audit_buf_free()
54 	kfree(buf);  in tty_audit_buf_free()
57 static void tty_audit_buf_put(struct tty_audit_buf *buf)  in tty_audit_buf_put()  argument
59 	if (atomic_dec_and_test(&buf->count))  in tty_audit_buf_put()
60 		tty_audit_buf_free(buf);  in tty_audit_buf_put()
94 static void tty_audit_buf_push(struct tty_audit_buf *buf)  in tty_audit_buf_push()  argument
96 	if (buf->valid == 0)  in tty_audit_buf_push()
99 		buf->valid = 0;  in tty_audit_buf_push()
102 	tty_audit_log("tty", buf->major, buf->minor, buf->data, buf->valid);  in tty_audit_buf_push()
103 	buf->valid = 0;  in tty_audit_buf_push()
114 	struct tty_audit_buf *buf;  in tty_audit_exit()  local
116 	buf = current->signal->tty_audit_buf;  in tty_audit_exit()
118 	if (!buf)  in tty_audit_exit()
121 	mutex_lock(&buf->mutex);  in tty_audit_exit()
122 	tty_audit_buf_push(buf);  in tty_audit_exit()
123 	mutex_unlock(&buf->mutex);  in tty_audit_exit()
125 	tty_audit_buf_put(buf);  in tty_audit_exit()
144 	struct tty_audit_buf *buf;  in tty_audit_tiocsti()  local
150 	buf = current->signal->tty_audit_buf;  in tty_audit_tiocsti()
151 	if (buf)  in tty_audit_tiocsti()
152 		atomic_inc(&buf->count);  in tty_audit_tiocsti()
157 	if (buf) {  in tty_audit_tiocsti()
158 		mutex_lock(&buf->mutex);  in tty_audit_tiocsti()
159 		if (buf->major == major && buf->minor == minor)  in tty_audit_tiocsti()
160 			tty_audit_buf_push(buf);  in tty_audit_tiocsti()
161 		mutex_unlock(&buf->mutex);  in tty_audit_tiocsti()
162 		tty_audit_buf_put(buf);  in tty_audit_tiocsti()
183 	struct tty_audit_buf *buf = ERR_PTR(-EPERM);  in tty_audit_push_current()  local
191 		buf = tsk->signal->tty_audit_buf;  in tty_audit_push_current()
192 		if (buf)  in tty_audit_push_current()
193 			atomic_inc(&buf->count);  in tty_audit_push_current()
201 	if (!buf || IS_ERR(buf))  in tty_audit_push_current()
202 		return PTR_ERR(buf);  in tty_audit_push_current()
204 	mutex_lock(&buf->mutex);  in tty_audit_push_current()
205 	tty_audit_buf_push(buf);  in tty_audit_push_current()
206 	mutex_unlock(&buf->mutex);  in tty_audit_push_current()
208 	tty_audit_buf_put(buf);  in tty_audit_push_current()
222 	struct tty_audit_buf *buf, *buf2;  in tty_audit_buf_get()  local
225 	buf = NULL;  in tty_audit_buf_get()
230 	buf = current->signal->tty_audit_buf;  in tty_audit_buf_get()
231 	if (buf) {  in tty_audit_buf_get()
232 		atomic_inc(&buf->count);  in tty_audit_buf_get()
248 	buf = current->signal->tty_audit_buf;  in tty_audit_buf_get()
249 	if (!buf) {  in tty_audit_buf_get()
251 		buf = buf2;  in tty_audit_buf_get()
254 	atomic_inc(&buf->count);  in tty_audit_buf_get()
260 	return buf;  in tty_audit_buf_get()
271 	struct tty_audit_buf *buf;  in tty_audit_add_data()  local
289 	buf = tty_audit_buf_get(tty, icanon);  in tty_audit_add_data()
290 	if (!buf)  in tty_audit_add_data()
293 	mutex_lock(&buf->mutex);  in tty_audit_add_data()
296 	if (buf->major != major || buf->minor != minor  in tty_audit_add_data()
297 	    || buf->icanon != icanon) {  in tty_audit_add_data()
298 		tty_audit_buf_push(buf);  in tty_audit_add_data()
299 		buf->major = major;  in tty_audit_add_data()
300 		buf->minor = minor;  in tty_audit_add_data()
301 		buf->icanon = icanon;  in tty_audit_add_data()
306 		run = N_TTY_BUF_SIZE - buf->valid;  in tty_audit_add_data()
309 		memcpy(buf->data + buf->valid, data, run);  in tty_audit_add_data()
310 		buf->valid += run;  in tty_audit_add_data()
313 		if (buf->valid == N_TTY_BUF_SIZE)  in tty_audit_add_data()
314 			tty_audit_buf_push(buf);  in tty_audit_add_data()
316 	mutex_unlock(&buf->mutex);  in tty_audit_add_data()
317 	tty_audit_buf_put(buf);  in tty_audit_add_data()
327 	struct tty_audit_buf *buf;  in tty_audit_push()  local
335 	buf = current->signal->tty_audit_buf;  in tty_audit_push()
336 	if (buf)  in tty_audit_push()
337 		atomic_inc(&buf->count);  in tty_audit_push()
340 	if (buf) {  in tty_audit_push()
345 		mutex_lock(&buf->mutex);  in tty_audit_push()
346 		if (buf->major == major && buf->minor == minor)  in tty_audit_push()
347 			tty_audit_buf_push(buf);  in tty_audit_push()
348 		mutex_unlock(&buf->mutex);  in tty_audit_push()
349 		tty_audit_buf_put(buf);  in tty_audit_push()