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f2fs: add F2FS_IOC_SET_COMPRESS_OPTION ioctl

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Added a new F2FS_IOC_SET_COMPRESS_OPTION ioctl to change file
compression option of a file.

struct f2fs_comp_option {
    u8 algorithm;         => compression algorithm
                          => 0:lzo, 1:lz4, 2:zstd, 3:lzorle
    u8 log_cluster_size;  => log scale cluster size
                          => 2 ~ 8
};

struct f2fs_comp_option option;

option.algorithm = 1;
option.log_cluster_size = 7;

ioctl(fd, F2FS_IOC_SET_COMPRESS_OPTION, &option);

Signed-off-by: Daeho Jeong <daehojeong@google.com>
[Chao Yu: remove f2fs_is_compress_algorithm_valid()]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daeho Jeong
2020-10-30 13:10:35 +09:00
committed by Jaegeuk Kim
parent 9e2a5f8cfb
commit e1e8debec6
2 changed files with 56 additions and 0 deletions
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2
include/uapi/linux/f2fs.h
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@@ -38,6 +38,8 @@
struct f2fs_sectrim_range)
#define F2FS_IOC_GET_COMPRESS_OPTION _IOR(F2FS_IOCTL_MAGIC, 21, \
struct f2fs_comp_option)
#define F2FS_IOC_SET_COMPRESS_OPTION _IOW(F2FS_IOCTL_MAGIC, 22, \
struct f2fs_comp_option)
/*
* should be same as XFS_IOC_GOINGDOWN.