linux-kernel - [PATCH RFC v2 12/16] btrfs: Add new FEATURE_INCOMPAT

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Message-Id: <a9b2d83d6f8e0d179acc9e823c2ebda6eb938c8c.1658623319.git.sweettea-kernel@dorminy.me>
Date:   Sat, 23 Jul 2022 20:53:57 -0400
From:   Sweet Tea Dorminy <sweettea-kernel@...miny.me>
To:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, osandov@...ndov.com,
        kernel-team@...com
Cc:     Sweet Tea Dorminy <sweettea-kernel@...miny.me>
Subject: [PATCH RFC v2 12/16] btrfs: Add new FEATURE_INCOMPAT_FSCRYPT feature flag.

From: Omar Sandoval <osandov@...ndov.com>

As fscrypt files will be incompatible with older filesystem versions,
new filesystems should be created with an incompat flag for fscrypt.

Signed-off-by: Omar Sandoval <osandov@...ndov.com>
Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@...miny.me>
---
 fs/btrfs/ctree.h           | 6 ++++--
 include/uapi/linux/btrfs.h | 1 +
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index bd8855da2e54..9fab4d33a326 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -334,7 +334,8 @@ static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
 	 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_FSCRYPT)
 #else
 #define BTRFS_FEATURE_INCOMPAT_SUPP			\
 	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\
@@ -349,7 +350,8 @@ static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
 	 BTRFS_FEATURE_INCOMPAT_NO_HOLES	|	\
 	 BTRFS_FEATURE_INCOMPAT_METADATA_UUID	|	\
 	 BTRFS_FEATURE_INCOMPAT_RAID1C34	|	\
-	 BTRFS_FEATURE_INCOMPAT_ZONED)
+	 BTRFS_FEATURE_INCOMPAT_ZONED		|	\
+	 BTRFS_FEATURE_INCOMPAT_FSCRYPT)
 #endif
 
 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET			\
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index f54dc91e4025..b19fc3725769 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -310,6 +310,7 @@ 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_FSCRYPT		(1ULL << 14)
 
 struct btrfs_ioctl_feature_flags {
 	__u64 compat_flags;
-- 
2.35.1