mke2fs, tune2fs, resize2fs: add warning messages for bigalloc and quota
The bigalloc and quota features have some known issues, so issue
warnings in case users try to use them.
More information can be found here:
https://ext4.wiki.kernel.org/index.php/Bigalloc
https://ext4.wiki.kernel.org/index.php/Quota
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/resize/main.c b/resize/main.c
index 711e375..4cbfe69 100644
--- a/resize/main.c
+++ b/resize/main.c
@@ -147,6 +147,18 @@
#endif
}
+static bigalloc_check(ext2_filsys fs, int force)
+{
+ if (!force && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
+ fprintf(stderr, _("\nResizing bigalloc file systems has "
+ "not been fully tested. Proceed\n"
+ "at your own risk! Use the force option "
+ "if you want to go ahead anyway.\n\n"));
+ exit(1);
+ }
+}
+
int main (int argc, char ** argv)
{
errcode_t retval;
@@ -428,6 +440,7 @@
exit(0);
}
if (mount_flags & EXT2_MF_MOUNTED) {
+ bigalloc_check(fs, force);
retval = online_resize_fs(fs, mtpt, &new_size, flags);
} else {
if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
@@ -438,6 +451,7 @@
device_name);
exit(1);
}
+ bigalloc_check(fs, force);
printf(_("Resizing the filesystem on "
"%s to %llu (%dk) blocks.\n"),
device_name, new_size, fs->blocksize / 1024);