diff options
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 8 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 13 |
2 files changed, 21 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index ccf8bf4..dbd277e 100644 --- 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 */ diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 8a28f79..28c8992 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -964,6 +964,12 @@ static int f2fs_get_context(struct inode *inode, void *ctx, size_t len) ctx, len, NULL); } +static int f2fs_key_prefix(struct inode *inode, u8 **key) +{ + *key = F2FS_I_SB(inode)->key_prefix; + return F2FS_I_SB(inode)->key_prefix_size; +} + static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len, void *fs_data) { @@ -980,6 +986,7 @@ static unsigned f2fs_max_namelen(struct inode *inode) static struct fscrypt_operations f2fs_cryptops = { .get_context = f2fs_get_context, + .key_prefix = f2fs_key_prefix, .set_context = f2fs_set_context, .is_encrypted = f2fs_encrypted_inode, .empty_dir = f2fs_empty_dir, @@ -1305,6 +1312,12 @@ static void init_sb_info(struct f2fs_sb_info *sbi) INIT_LIST_HEAD(&sbi->s_list); mutex_init(&sbi->umount_mutex); + +#ifdef CONFIG_F2FS_FS_ENCRYPTION + memcpy(sbi->key_prefix, F2FS_KEY_DESC_PREFIX, + F2FS_KEY_DESC_PREFIX_SIZE); + sbi->key_prefix_size = F2FS_KEY_DESC_PREFIX_SIZE; +#endif } /* |