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-rw-r--r--c_src/tools-util.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/c_src/tools-util.c b/c_src/tools-util.c
index 43c9b789..3a76a02e 100644
--- a/c_src/tools-util.c
+++ b/c_src/tools-util.c
@@ -185,6 +185,24 @@ unsigned get_blocksize(int fd)
/* Open a block device, do magic blkid stuff to probe for existing filesystems: */
int open_for_format(struct dev_opts *dev, bool force)
{
+ int blkid_version_code = blkid_get_library_version(NULL, NULL);
+ if (blkid_version_code < 2401) {
+ if (force) {
+ fprintf(
+ stderr,
+ "Continuing with out of date libblkid %s because --force was passed.\n",
+ BLKID_VERSION);
+ } else {
+ // Reference for picking 2.40.1:
+ // https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.40/v2.40.1-ReleaseNotes
+ // https://github.com/util-linux/util-linux/issues/3103
+ die(
+ "Refusing to format when using libblkid %s\n"
+ "libblkid >= 2.40.1 is required to check for existing filesystems\n"
+ "Earlier versions may not recognize some bcachefs filesystems.\n", BLKID_VERSION);
+ }
+ }
+
blkid_probe pr;
const char *fs_type = NULL, *fs_label = NULL;
size_t fs_type_len, fs_label_len;