Btrfs: Check metadata redundancy on balance
When converting a filesystem via balance check that metadata mode
is at least as redundant as the data mode. For example give warning
when:
-dconvert=raid1 -mconvert=single
Signed-off-by: Sam Tygier <samtygier@yahoo.co.uk>
[ minor message reformatting ]
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e95d249..574a717 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3748,6 +3748,13 @@
}
} while (read_seqretry(&fs_info->profiles_lock, seq));
+ if (btrfs_get_num_tolerated_disk_barrier_failures(bctl->meta.target) <
+ btrfs_get_num_tolerated_disk_barrier_failures(bctl->data.target)) {
+ btrfs_warn(fs_info,
+ "metatdata profile 0x%llx has lower redundancy than data profile 0x%llx",
+ bctl->meta.target, bctl->data.target);
+ }
+
if (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
fs_info->num_tolerated_disk_barrier_failures = min(
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info),