• Jaegeuk Kim's avatar
    f2fs crypto: use per-inode tfm structure · 26bf3dc7
    Jaegeuk Kim authored
    This patch applies the following ext4 patch:
    
      ext4 crypto: use per-inode tfm structure
    
    As suggested by Herbert Xu, we shouldn't allocate a new tfm each time
    we read or write a page.  Instead we can use a single tfm hanging off
    the inode's crypt_info structure for all of our encryption needs for
    that inode, since the tfm can be used by multiple crypto requests in
    parallel.
    
    Also use cmpxchg() to avoid races that could result in crypt_info
    structure getting doubly allocated or doubly freed.
    Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
    Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
    26bf3dc7
crypto_key.c 6.67 KB