• Chao Yu's avatar
    f2fs: do not trim preallocated blocks when truncating after i_size · 3c454145
    Chao Yu authored
    
    
    When we perform generic/092 in xfstests, output is like below:
    
         XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
         0: [0..10239]: data
         0: [0..10239]: data
        -1: [10240..20479]: unwritten
        +1: [10240..14335]: unwritten
    
    This is because with this testcase, we redefine the regulation for
    truncate in perallocated space past i_size as below:
    
    "There was some confused about what the fs was supposed to do when you
    truncate at i_size with preallocated space past i_size. We decided on the
    following things.
    
    1) truncate(i_size) will trim all blocks past i_size.
    2) truncate(x) where x > i_size will not trim all blocks past i_size.
    "
    
    This method is used in xfs, and then ext4/btrfs will follow the rule.
    
    This patch fixes to follow the new rule for f2fs.
    Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
    Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
    3c454145
file.c 37.3 KB