1. 26 Mar, 2016 1 commit
    • Linus Torvalds's avatar
      f2fs/crypto: fix xts_tweak initialization · 02fc59a0
      Linus Torvalds authored
      Commit 0b81d077 ("fs crypto: move per-file encryption from f2fs
      tree to fs/crypto") moved the f2fs crypto files to fs/crypto/ and
      renamed the symbol prefixes from "f2fs_" to "fscrypt_" (and from "F2FS_"
      to just "FS" for preprocessor symbols).
      
      Because of the symbol renaming, it's a bit hard to see it as a file
      move: use
      
          git show -M30 0b81d077
      
      
      
      to lower the rename detection to just 30% similarity and make git show
      the files as renamed (the header file won't be shown as a rename even
      then - since all it contains is symbol definitions, it looks almost
      completely different).
      
      Even with the renames showing as renames, the diffs are not all that
      easy to read, since so much is just the renames.  But Eric Biggers
      noticed that it's not just all renames: the initialization of the
      xts_tweak had been broken too, using the inode number rather than the
      page offset.
      
      That's not right - it makes the xfs_tweak the same for all pages of each
      inode.  It _might_ make sense to make the xfs_tweak contain both the
      offset _and_ the inode number, but not just the inode number.
      Reported-by: default avatarEric Biggers <ebiggers3@gmail.com>
      Cc: Jaegeuk Kim <jaegeuk@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      02fc59a0
  2. 18 Mar, 2016 1 commit
    • 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