fscrypto/f2fs: allow fs-specific key prefix for fs encryption

[deliverable/linux.git] / fs / f2fs / f2fs.h

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index ccf8bf4debfcc09e874c6e73b5c9db11b592b0a4..dbd277eb9da7673b16a0493f15223d3a8fa89e23 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -711,6 +711,10 @@ enum {
        MAX_TIME,
 };
 
+#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#define F2FS_KEY_DESC_PREFIX "f2fs:"
+#define F2FS_KEY_DESC_PREFIX_SIZE 5
+#endif
 struct f2fs_sb_info {
        struct super_block *sb;                 /* pointer to VFS super block */
        struct proc_dir_entry *s_proc;          /* proc entry */
@@ -718,6 +722,10 @@ struct f2fs_sb_info {
        int valid_super_block;                  /* valid super block no */
        int s_flag;                             /* flags for sbi */
 
+#ifdef CONFIG_F2FS_FS_ENCRYPTION
+       u8 key_prefix[F2FS_KEY_DESC_PREFIX_SIZE];
+       u8 key_prefix_size;
+#endif
        /* for node-related operations */
        struct f2fs_nm_info *nm_info;           /* node manager */
        struct inode *node_inode;               /* cache node blocks */