diff options
| author | Daeho Jeong <daehojeong@google.com> | 2020-12-01 13:08:02 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-12-03 00:11:57 -0800 |
| commit | 602a16d58e9aab3c423bcf051033ea6c9e8a6d37 (patch) | |
| tree | b14640b883fad02423a7ffe06f90607f585a0524 /fs/f2fs/super.c | |
| parent | db48965264110dd74d1436fc21dac328d04385d2 (diff) | |
| download | linux-602a16d58e9aab3c423bcf051033ea6c9e8a6d37.tar.bz2 | |
f2fs: add compress_mode mount option
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>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 0ac4dbd6488a..c6a3365f4844 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -147,6 +147,7 @@ enum { Opt_compress_log_size, Opt_compress_extension, Opt_compress_chksum, + Opt_compress_mode, Opt_atgc, Opt_err, }; @@ -216,6 +217,7 @@ static match_table_t f2fs_tokens = { {Opt_compress_log_size, "compress_log_size=%u"}, {Opt_compress_extension, "compress_extension=%s"}, {Opt_compress_chksum, "compress_chksum"}, + {Opt_compress_mode, "compress_mode=%s"}, {Opt_atgc, "atgc"}, {Opt_err, NULL}, }; @@ -939,11 +941,26 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) case Opt_compress_chksum: F2FS_OPTION(sbi).compress_chksum = true; break; + case Opt_compress_mode: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "fs")) { + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; + } else if (!strcmp(name, "user")) { + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; #else case Opt_compress_algorithm: case Opt_compress_log_size: case Opt_compress_extension: case Opt_compress_chksum: + case Opt_compress_mode: f2fs_info(sbi, "compression options not supported"); break; #endif @@ -1532,6 +1549,11 @@ static inline void f2fs_show_compress_options(struct seq_file *seq, if (F2FS_OPTION(sbi).compress_chksum) seq_puts(seq, ",compress_chksum"); + + if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS) + seq_printf(seq, ",compress_mode=%s", "fs"); + else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER) + seq_printf(seq, ",compress_mode=%s", "user"); } static int f2fs_show_options(struct seq_file *seq, struct dentry *root) @@ -1681,6 +1703,7 @@ static void default_options(struct f2fs_sb_info *sbi) F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4; F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE; F2FS_OPTION(sbi).compress_ext_cnt = 0; + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; sbi->sb->s_flags &= ~SB_INLINECRYPT; |