diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2015-04-11 07:44:12 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2015-04-11 07:44:12 -0400 |
| commit | f542fbe8d5e842ed4e9ad6ccc6c2913407451c51 (patch) | |
| tree | 740297aefa3fe310a1c8cbad5761a86e4a9f315f | |
| parent | f64e02fe9bc6a359cab95632b33900094d225ae1 (diff) | |
ext4 crypto: reserve codepoints used by the ext4 encryption feature
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index f7f3f5871796..e1683829b2b5 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -422,7 +422,7 @@ enum { EXT4_INODE_DIRTY = 8, EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ EXT4_INODE_NOCOMPR = 10, /* Don't compress */ - EXT4_INODE_ENCRYPT = 11, /* Compression error */ + EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ /* End compression flags --- maybe not all used */ EXT4_INODE_INDEX = 12, /* hash-indexed directory */ EXT4_INODE_IMAGIC = 13, /* AFS directory */ @@ -582,6 +582,13 @@ enum { #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 +/* Encryption algorithms */ +#define EXT4_ENCRYPTION_MODE_INVALID 0 +#define EXT4_ENCRYPTION_MODE_AES_256_XTS 1 +#define EXT4_ENCRYPTION_MODE_AES_256_GCM 2 +#define EXT4_ENCRYPTION_MODE_AES_256_CBC 3 +#define EXT4_ENCRYPTION_MODE_AES_256_CTS 4 + /* * ioctl commands */ @@ -1142,7 +1149,8 @@ struct ext4_super_block { __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ __u8 s_log_groups_per_flex; /* FLEX_BG group size */ __u8 s_checksum_type; /* metadata checksum algorithm used */ - __le16 s_reserved_pad; + __u8 s_encryption_level; /* versioning level for encryption */ + __u8 s_reserved_pad; /* Padding to next 32bits */ __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ __le32 s_snapshot_inum; /* Inode number of active snapshot */ __le32 s_snapshot_id; /* sequential ID of active snapshot */ @@ -1169,7 +1177,9 @@ struct ext4_super_block { __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ - __le32 s_reserved[105]; /* Padding to the end of the block */ + __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ + __le32 s_lpf_ino; /* Location of the lost+found inode */ + __le32 s_reserved[100]; /* Padding to the end of the block */ __le32 s_checksum; /* crc32c(superblock) */ }; |