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| author | Chao Yu <yuchao0@huawei.com> | 2020-11-26 18:32:09 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-12-02 22:00:22 -0800 |
| commit | b28f047b28c51d0b9864c34b097bb0b221ea7247 (patch) | |
| tree | d4e6f534dd5746eb54943653c79fc1133b80b803 /fs/f2fs/super.c | |
| parent | 493720a4854343b7c3fe100cda6a3a2c3f8d4b5d (diff) | |
| download | linux-b28f047b28c51d0b9864c34b097bb0b221ea7247.tar.gz linux-b28f047b28c51d0b9864c34b097bb0b221ea7247.tar.bz2 linux-b28f047b28c51d0b9864c34b097bb0b221ea7247.zip | |
f2fs: compress: support chksum
This patch supports to store chksum value with compressed
data, and verify the integrality of compressed data while
reading the data.
The feature can be enabled through specifying mount option
'compress_chksum'.
Signed-off-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 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 82baaa89c893..f3d919ee4dee 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -146,6 +146,7 @@ enum { Opt_compress_algorithm, Opt_compress_log_size, Opt_compress_extension, + Opt_compress_chksum, Opt_atgc, Opt_err, }; @@ -214,6 +215,7 @@ static match_table_t f2fs_tokens = { {Opt_compress_algorithm, "compress_algorithm=%s"}, {Opt_compress_log_size, "compress_log_size=%u"}, {Opt_compress_extension, "compress_extension=%s"}, + {Opt_compress_chksum, "compress_chksum"}, {Opt_atgc, "atgc"}, {Opt_err, NULL}, }; @@ -934,10 +936,14 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) F2FS_OPTION(sbi).compress_ext_cnt++; kfree(name); break; + case Opt_compress_chksum: + F2FS_OPTION(sbi).compress_chksum = true; + break; #else case Opt_compress_algorithm: case Opt_compress_log_size: case Opt_compress_extension: + case Opt_compress_chksum: f2fs_info(sbi, "compression options not supported"); break; #endif @@ -1523,6 +1529,9 @@ static inline void f2fs_show_compress_options(struct seq_file *seq, seq_printf(seq, ",compress_extension=%s", F2FS_OPTION(sbi).extensions[i]); } + + if (F2FS_OPTION(sbi).compress_chksum) + seq_puts(seq, ",compress_chksum"); } static int f2fs_show_options(struct seq_file *seq, struct dentry *root) |