mainline inclusion
    from mainline-v5.19
    commit 3fde13f8
    category: feature
    bugzilla: https://gitee.com/openeuler/kernel/issues/I5XET6
    CVE: NA
    ---------------------------------

    Expand 'compress_algorithm' mount option to accept parameter as format of
    <algorithm>:<level>, by this way, it gives a way to allow user to do more
    specified config on lz4 and zstd compression level, then f2fs compression
    can provide higher compress ratio.

    In order to set compress level for lz4 algorithm, it needs to set
    CONFIG_LZ4HC_COMPRESS and CONFIG_F2FS_FS_LZ4HC config to enable lz4hc
    compress algorithm.

    CR and performance number on lz4/lz4hc algorithm:

    dd if=enwik9 of=compressed_file conv=fsync

    Original blocks:        244382

                            lz4                     lz4hc-9
    compressed blocks       170647                  163270
    compress ratio          69.8%                   66.8%
    speed                   16.4207 s, 60.9 MB/s    26.7299 s, 37.4 MB/s

    compress ratio = after / before
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: NGewus <1319579758@qq.com>