From: Omar Sandoval <osandov@xxxxxxxxxxx>
As encrypted files will be incompatible with older filesystem versions,
new filesystems should be created with an incompat flag for fscrypt,
which will gate access to the encryption ioctls.
Signed-off-by: Omar Sandoval <osandov@xxxxxxxxxxx>
Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@xxxxxxxxxx>
---
fs/btrfs/fs.h | 7 ++++---
fs/btrfs/super.c | 5 +++++
include/uapi/linux/btrfs.h | 1 +
3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h
index 203d2a267828..578874fbc98f 100644
--- a/fs/btrfs/fs.h
+++ b/fs/btrfs/fs.h
@@ -225,9 +225,10 @@ enum {
* Features under developmen like Extent tree v2 support is enabled
* only under CONFIG_BTRFS_DEBUG.
*/
-#define BTRFS_FEATURE_INCOMPAT_SUPP \
- (BTRFS_FEATURE_INCOMPAT_SUPP_STABLE | \
- BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2)
+#define BTRFS_FEATURE_INCOMPAT_SUPP \
+ (BTRFS_FEATURE_INCOMPAT_SUPP_STABLE | \
+ BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 | \
+ BTRFS_FEATURE_INCOMPAT_ENCRYPT)
#else
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 08b1e2ded5be..0cc9c2909f64 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2421,6 +2421,11 @@ static int __init btrfs_print_mod_info(void)
", fsverity=yes"
#else
", fsverity=no"
+#endif
+#ifdef CONFIG_FS_ENCRYPTION
+ ", fscrypt=yes"
+#else
+ ", fscrypt=no"
#endif
;
pr_info("Btrfs loaded%s\n", options);
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index dbb8b96da50d..98d1fa51a351 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -333,6 +333,7 @@ struct btrfs_ioctl_fs_info_args {
#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
#define BTRFS_FEATURE_INCOMPAT_ZONED (1ULL << 12)
#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 (1ULL << 13)
+#define BTRFS_FEATURE_INCOMPAT_ENCRYPT (1ULL << 14)
struct btrfs_ioctl_feature_flags {
__u64 compat_flags;
--
2.40.1
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