ext4 crypto: add encryption xattr support

Signed-off-by: Michael Halcrow <mhalcrow@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 29bedf5589f6..ddc0957760ba 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -23,6 +23,7 @@
 #define EXT4_XATTR_INDEX_SECURITY               6
 #define EXT4_XATTR_INDEX_SYSTEM                 7
 #define EXT4_XATTR_INDEX_RICHACL                8
+#define EXT4_XATTR_INDEX_ENCRYPTION             9
 
 struct ext4_xattr_header {
         __le32  h_magic;        /* magic number for identification */
@@ -98,6 +99,8 @@ extern const struct xattr_handler ext4_xattr_user_handler;
 extern const struct xattr_handler ext4_xattr_trusted_handler;
 extern const struct xattr_handler ext4_xattr_security_handler;
 
+#define EXT4_XATTR_NAME_ENCRYPTION_CONTEXT "c"
+
 extern ssize_t ext4_listxattr(struct dentry *, char *, size_t);
 
 extern int ext4_xattr_get(struct inode *, int, const char *, void *, size_t);