• Jaegeuk Kim's avatar
    fs crypto: move per-file encryption from f2fs tree to fs/crypto · 0b81d077
    Jaegeuk Kim authored
    
    
    This patch adds the renamed functions moved from the f2fs crypto files.
    
    1. definitions for per-file encryption used by ext4 and f2fs.
    
    2. crypto.c for encrypt/decrypt functions
     a. IO preparation:
      - fscrypt_get_ctx / fscrypt_release_ctx
     b. before IOs:
      - fscrypt_encrypt_page
      - fscrypt_decrypt_page
      - fscrypt_zeroout_range
     c. after IOs:
      - fscrypt_decrypt_bio_pages
      - fscrypt_pullback_bio_page
      - fscrypt_restore_control_page
    
    3. policy.c supporting context management.
     a. For ioctls:
      - fscrypt_process_policy
      - fscrypt_get_policy
     b. For context permission
      - fscrypt_has_permitted_context
      - fscrypt_inherit_context
    
    4. keyinfo.c to handle permissions
      - fscrypt_get_encryption_info
      - fscrypt_free_encryption_info
    
    5. fname.c to support filename encryption
     a. general wrapper functions
      - fscrypt_fname_disk_to_usr
      - fscrypt_fname_usr_to_disk
      - fscrypt_setup_filename
      - fscrypt_free_filename
    
     b. specific filename handling functions
      - fscrypt_fname_alloc_buffer
      - fscrypt_fname_free_buffer
    
    6. Makefile and Kconfig
    
    Cc: Al Viro <viro@ftp.linux.org.uk>
    Signed-off-by: default avatarMichael Halcrow <mhalcrow@google.com>
    Signed-off-by: default avatarIldar Muslukhov <ildarm@google.com>
    Signed-off-by: default avatarUday Savagaonkar <savagaon@google.com>
    Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
    0b81d077
file.c 44.5 KB