[PATCH 2/2] btrfs-progs: prevent btrfsck to run on mounted filesystems

Andi Drebes
2009-11-21T14:39:15Z

As recently discussed on the list, btrfsck should only be run on unmounted filesystems. This patch adds a short check for the mount status at the beginning of btrfsck. If the FS is mounted, the program aborts showing an error message.

Signed-off-by: Andi Drebes <lists-receive@programmierforen.de>
---
diff --git a/btrfsck.c b/btrfsck.c
index 73f1836..6f2a0d0 100644
--- a/btrfsck.c
+++ b/btrfsck.c
@@ -28,6 +28,7 @@
#include "transaction.h"
#include "list.h"
#include "version.h"
+#include "utils.h"

static u64 bytes_used = 0;
static u64 total_csum_bytes = 0;
@@ -2821,6 +2822,15 @@ int main(int ac, char **av)

radix_tree_init();
cache_tree_init(&root_cache);
+
+ if((ret = check_mounted(av[1])) < 0) {
+ fprintf(stderr, "Could not check mount status: %s\n", strerror(ret));
+ return ret;
+ } else if(ret) {
+ fprintf(stderr, "%s is currently mounted. Aborting.\n", av[1]);
+ return -EBUSY;
+ }
+
root = open_ctree(av[1], 0, 0);

if (root == NULL)