Lines Matching defs:buf

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