btrfs-convert convert FS with latest default features enabled, and
if the kernel is down-rev and does not support a latest feature then
mount fails, as expected.
This patch disables default features based on the running kernel.
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
v2: Check if sysfs tells what features are supported
btrfs-convert.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/btrfs-convert.c b/btrfs-convert.c
index 73ac584..52ea12a 100644
--- a/btrfs-convert.c
+++ b/btrfs-convert.c
@@ -2896,7 +2896,15 @@ int main(int argc, char *argv[])
int progress = 1;
char *file;
char fslabel[BTRFS_LABEL_SIZE];
- u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
+ u64 features;
+
+ if (btrfs_features_allowed_by_sysfs(&features))
+ features = btrfs_features_allowed_by_kernel();
+
+ if (features)
+ features &= BTRFS_MKFS_DEFAULT_FEATURES;
+ else
+ features = BTRFS_MKFS_DEFAULT_FEATURES;
while(1) {
enum { GETOPT_VAL_NO_PROGRESS = 256 };
--
2.6.2
--
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