+static
+const struct seq_operations lttng_syscall_list_seq_ops = {
+ .start = syscall_list_start,
+ .next = syscall_list_next,
+ .stop = syscall_list_stop,
+ .show = syscall_list_show,
+};
+
+static
+int lttng_syscall_list_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, <tng_syscall_list_seq_ops);
+}
+
+const struct file_operations lttng_syscall_list_fops = {
+ .owner = THIS_MODULE,
+ .open = lttng_syscall_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * A syscall is enabled if it is traced for either entry or exit.
+ */
+long lttng_channel_syscall_mask(struct lttng_channel *channel,
+ struct lttng_kernel_syscall_mask __user *usyscall_mask)
+{
+ uint32_t len, sc_tables_len, bitmask_len;
+ int ret = 0, bit;
+ char *tmp_mask;
+ struct lttng_syscall_filter *filter;
+
+ ret = get_user(len, &usyscall_mask->len);
+ if (ret)
+ return ret;
+ sc_tables_len = get_sc_tables_len();
+ bitmask_len = ALIGN(sc_tables_len, 8) >> 3;
+ if (len < sc_tables_len) {
+ return put_user(sc_tables_len, &usyscall_mask->len);