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f2fs: add compress_mode mount option

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We will add a new "compress_mode" mount option to control file
compression mode. This supports "fs" and "user". In "fs" mode (default),
f2fs does automatic compression on the compression enabled files.
In "user" mode, f2fs disables the automaic compression and gives the
user discretion of choosing the target file and the timing. It means
the user can do manual compression/decompression on the compression
enabled files using ioctls.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daeho Jeong
2020-12-01 13:08:02 +09:00
committed by Jaegeuk Kim
parent 516758ca20
commit f15a200ae8
6 changed files with 91 additions and 3 deletions
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2
fs/f2fs/segment.c
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@@ -3261,7 +3261,7 @@ static int __get_segment_type_6(struct f2fs_io_info *fio)
else
return CURSEG_COLD_DATA;
}
if (file_is_cold(inode) || f2fs_compressed_file(inode))
if (file_is_cold(inode) || f2fs_need_compress_data(inode))
return CURSEG_COLD_DATA;
if (file_is_hot(inode) ||
is_inode_flag_set(inode, FI_HOT_DATA) ||