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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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include/linux/f2fs_fs.h
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@@ -273,7 +273,7 @@ struct f2fs_inode {
__le64 i_compr_blocks; /* # of compressed blocks */
__u8 i_compress_algorithm; /* compress algorithm */
__u8 i_log_cluster_size; /* log of cluster size */
__le16 i_padding; /* padding */
__le16 i_compress_flag; /* compress flag */
__le32 i_extra_end[0]; /* for attribute size calculation */
} __packed;
__le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */