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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-04-20 23:57:51 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-05-29 01:41:45 +0300 |
| commit | cde4de1205770514005663d70a9a7d81cb555085 (patch) | |
| tree | 611ae5b0c5c5693e4365a61ec6edc3751ff457ff /fs/f2fs/f2fs.h | |
| parent | 7f63eb77af7bd7580b27b0c3f249f7efaa5c63ae (diff) | |
| download | linux-cde4de1205770514005663d70a9a7d81cb555085.tar.xz | |
f2fs crypto: declare some definitions for f2fs encryption feature
This definitions will be used by inode and superblock for encyption.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 477e65fe7665..2c2948fbc35f 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -70,6 +70,8 @@ struct f2fs_mount_info { unsigned int opt; }; +#define F2FS_FEATURE_ENCRYPT 0x0001 + #define F2FS_HAS_FEATURE(sb, mask) \ ((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0) #define F2FS_SET_FEATURE(sb, mask) \ @@ -346,6 +348,7 @@ struct f2fs_map_blocks { */ #define FADVISE_COLD_BIT 0x01 #define FADVISE_LOST_PINO_BIT 0x02 +#define FADVISE_ENCRYPT_BIT 0x04 #define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT) #define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT) @@ -353,6 +356,16 @@ struct f2fs_map_blocks { #define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT) #define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT) #define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT) +#define file_is_encrypt(inode) is_file(inode, FADVISE_ENCRYPT_BIT) +#define file_set_encrypt(inode) set_file(inode, FADVISE_ENCRYPT_BIT) +#define file_clear_encrypt(inode) clear_file(inode, FADVISE_ENCRYPT_BIT) + +/* Encryption algorithms */ +#define F2FS_ENCRYPTION_MODE_INVALID 0 +#define F2FS_ENCRYPTION_MODE_AES_256_XTS 1 +#define F2FS_ENCRYPTION_MODE_AES_256_GCM 2 +#define F2FS_ENCRYPTION_MODE_AES_256_CBC 3 +#define F2FS_ENCRYPTION_MODE_AES_256_CTS 4 #define DEF_DIR_LEVEL 0 @@ -380,6 +393,11 @@ struct f2fs_inode_info { struct radix_tree_root inmem_root; /* radix tree for inmem pages */ struct list_head inmem_pages; /* inmemory pages managed by f2fs */ struct mutex inmem_lock; /* lock for inmemory pages */ + +#ifdef CONFIG_F2FS_FS_ENCRYPTION + /* Encryption params */ + struct f2fs_crypt_info *i_crypt_info; +#endif }; static inline void get_extent_info(struct extent_info *ext, @@ -1891,4 +1909,41 @@ void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *, struct inode *, struct inode *); bool f2fs_empty_inline_dir(struct inode *); int f2fs_read_inline_dir(struct file *, struct dir_context *); + +/* + * crypto support + */ +static inline int f2fs_encrypted_inode(struct inode *inode) +{ +#ifdef CONFIG_F2FS_FS_ENCRYPTION + return file_is_encrypt(inode); +#else + return 0; +#endif +} + +static inline void f2fs_set_encrypted_inode(struct inode *inode) +{ +#ifdef CONFIG_F2FS_FS_ENCRYPTION + file_set_encrypt(inode); +#endif +} + +static inline bool f2fs_bio_encrypted(struct bio *bio) +{ +#ifdef CONFIG_F2FS_FS_ENCRYPTION + return unlikely(bio->bi_private != NULL); +#else + return false; +#endif +} + +static inline int f2fs_sb_has_crypto(struct super_block *sb) +{ +#ifdef CONFIG_F2FS_FS_ENCRYPTION + return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT); +#else + return 0; +#endif +} #endif |