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| author | Fengnan Chang <changfengnan@vivo.com> | 2021-06-08 19:15:08 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-07-01 18:34:31 -0700 |
| commit | 151b1982be5d9f4ca641687ee1a4bb4fba5d26cf (patch) | |
| tree | cb2b5168d7a8297c2f29319baa09d639bf1da220 /fs/f2fs/f2fs.h | |
| parent | bf1c5bc21b879bcddc8cf0fe0e1c3110fc8d25d6 (diff) | |
| download | linux-151b1982be5d9f4ca641687ee1a4bb4fba5d26cf.tar.gz linux-151b1982be5d9f4ca641687ee1a4bb4fba5d26cf.tar.bz2 linux-151b1982be5d9f4ca641687ee1a4bb4fba5d26cf.zip | |
f2fs: compress: add nocompress extensions support
When we create a directory with enable compression, all file write into
directory will try to compress.But sometimes we may know, new file
cannot meet compression ratio requirements.
We need a nocompress extension to skip those files to avoid unnecessary
compress page test.
After add nocompress_extension, the priority should be:
dir_flag < comp_extention,nocompress_extension < comp_file_flag,
no_comp_file_flag.
Priority in between FS_COMPR_FL, FS_NOCOMP_FS, extensions:
* compress_extension=so; nocompress_extension=zip; chattr +c dir;
touch dir/foo.so; touch dir/bar.zip; touch dir/baz.txt; then foo.so
and baz.txt should be compresse, bar.zip should be non-compressed.
chattr +c dir/bar.zip can enable compress on bar.zip.
* compress_extension=so; nocompress_extension=zip; chattr -c dir;
touch dir/foo.so; touch dir/bar.zip; touch dir/baz.txt; then foo.so
should be compresse, bar.zip and baz.txt should be non-compressed.
chattr+c dir/bar.zip; chattr+c dir/baz.txt; can enable compress on
bar.zip and baz.txt.
Signed-off-by: Fengnan Chang <changfengnan@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 16ce1ade9fa6..65befc68d88e 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -151,8 +151,10 @@ struct f2fs_mount_info { unsigned char compress_level; /* compress level */ bool compress_chksum; /* compressed data chksum */ unsigned char compress_ext_cnt; /* extension count */ + unsigned char nocompress_ext_cnt; /* nocompress extension count */ int compress_mode; /* compression mode */ unsigned char extensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN]; /* extensions */ + unsigned char noextensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN]; /* extensions */ }; #define F2FS_FEATURE_ENCRYPT 0x0001 |