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f2fs: compress: support chksum

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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>
This commit is contained in:
Chao Yu
2020-11-26 18:32:09 +08:00
committed by Jaegeuk Kim
parent 34315f8872
commit 1f004d62f8
6 changed files with 51 additions and 3 deletions
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3
fs/f2fs/inode.c
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@@ -456,6 +456,7 @@ static int do_read_inode(struct inode *inode)
le64_to_cpu(ri->i_compr_blocks));
fi->i_compress_algorithm = ri->i_compress_algorithm;
fi->i_log_cluster_size = ri->i_log_cluster_size;
fi->i_compress_flag = le16_to_cpu(ri->i_compress_flag);
fi->i_cluster_size = 1 << fi->i_log_cluster_size;
set_inode_flag(inode, FI_COMPRESSED_FILE);
}
@@ -634,6 +635,8 @@ void f2fs_update_inode(struct inode *inode, struct page *node_page)
&F2FS_I(inode)->i_compr_blocks));
ri->i_compress_algorithm =
F2FS_I(inode)->i_compress_algorithm;
ri->i_compress_flag =
cpu_to_le16(F2FS_I(inode)->i_compress_flag);
ri->i_log_cluster_size =
F2FS_I(inode)->i_log_cluster_size;
}