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>
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 657db2f..349d9cb 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -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;
}
