diff mbox series

[v4,17/21] btrfs: Add new FEATURE_INCOMPAT_ENCRYPT feature flag.

Message ID fa558869c5dd4edd2625e3012daecfeb3d06df56.1666651724.git.sweettea-kernel@dorminy.me (mailing list archive)
State Superseded
Headers show
Series btrfs: add fscrypt integration | expand

Commit Message

Sweet Tea Dorminy Oct. 24, 2022, 11:13 p.m. UTC 
From: Omar Sandoval <osandov@osandov.com>

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@osandov.com>
Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
---
 fs/btrfs/fs.h              | 5 +++--
 fs/btrfs/super.c           | 5 +++++
 include/uapi/linux/btrfs.h | 1 +
 3 files changed, 9 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h
index 2bd1b9e03d30..8eeb1918aa1c 100644
--- a/fs/btrfs/fs.h
+++ b/fs/btrfs/fs.h
@@ -159,7 +159,7 @@  enum {
 
 #ifdef CONFIG_BTRFS_DEBUG
 /*
- * Extent tree v2 supported only with CONFIG_BTRFS_DEBUG
+ * Extent tree v2 and encryption supported only with CONFIG_BTRFS_DEBUG
  */
 #define BTRFS_FEATURE_INCOMPAT_SUPP			\
 	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\
@@ -175,7 +175,8 @@  enum {
 	 BTRFS_FEATURE_INCOMPAT_METADATA_UUID	|	\
 	 BTRFS_FEATURE_INCOMPAT_RAID1C34	|	\
 	 BTRFS_FEATURE_INCOMPAT_ZONED		|	\
-	 BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2)
+	 BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2	|	\
+	 BTRFS_FEATURE_INCOMPAT_ENCRYPT)
 #else
 #define BTRFS_FEATURE_INCOMPAT_SUPP			\
 	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 8ab5171d07e8..c1075db7bfc7 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2751,6 +2751,11 @@  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, crc32c=%s%s\n", crc32c_impl(), options);
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 5655e89b962b..1d29f0df995b 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -316,6 +316,7 @@  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;