btrfsctl

1 files changed, 62 insertions, 0 deletions

diff --git a/btrfsctl.c b/btrfsctl.c
new file mode 100644
index 0000000..cab846b
--- /dev/null
+++ b/btrfsctl.c
@@ -0,0 +1,62 @@
+#ifndef __CHECKER__
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include "ioctl.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "kerncompat.h"
+
+#ifdef __CHECKER__
+#define BLKGETSIZE64 0
+#define BTRFS_IOC_SNAP_CREATE 0
+#define BTRFS_VOL_NAME_MAX 255
+struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
+static inline int ioctl(int fd, int define, void *arg) { return 0; }
+#endif
+
+void print_usage(void)
+{
+	printf("usage: btrfsctl [ -s snapshot_name ] dir\n");
+	exit(1);
+}
+
+int main(int ac, char **av)
+{
+	char *fname;
+	int fd;
+	int ret;
+	struct btrfs_ioctl_vol_args args;
+	char *name;
+	int i;
+
+	for (i = 1; i < ac - 1; i++) {
+		if (strcmp(av[i], "-s") == 0) {
+			if (i + 1 >= ac - 1) {
+				fprintf(stderr, "-s requires an arg");
+				print_usage();
+			}
+			name = av[i + 1];
+			if (strlen(name) >= BTRFS_VOL_NAME_MAX) {
+				fprintf(stderr, "snapshot name is too long\n");
+				exit(1);
+			}
+		}
+	}
+	fname = av[ac - 1];
+printf("fname is %s\n", fname);
+	fd = open(fname, O_RDWR);
+	if (fd < 0) {
+		perror("open");
+		exit(1);
+	}
+	strcpy(args.name, name);
+	ret = ioctl(fd, BTRFS_IOC_SNAP_CREATE, &args);
+	printf("ioctl returns %d\n", ret);
+	return 0;
+}
+