xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

f2fs: support superblock checksum

Browse Source 
Now we support crc32 checksum for superblock.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Junling Zheng <zhengjunling@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Junling Zheng
2018-09-28 20:25:56 +08:00
committed by Jaegeuk Kim
parent 274bd9ba39
commit d440c52d31
4 changed files with 39 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
fs/f2fs/super.c
View File

@@ -2178,6 +2178,26 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
(bh->b_data + F2FS_SUPER_OFFSET);
struct super_block *sb = sbi->sb;
unsigned int blocksize;
size_t crc_offset = 0;
__u32 crc = 0;
/* Check checksum_offset and crc in superblock */
if (le32_to_cpu(raw_super->feature) & F2FS_FEATURE_SB_CHKSUM) {
crc_offset = le32_to_cpu(raw_super->checksum_offset);
if (crc_offset !=
offsetof(struct f2fs_super_block, crc)) {
f2fs_msg(sb, KERN_INFO,
"Invalid SB checksum offset: %zu",
crc_offset);
return 1;
}
crc = le32_to_cpu(raw_super->crc);
if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
f2fs_msg(sb, KERN_INFO,
"Invalid SB checksum value: %u", crc);
return 1;
}
}
if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
f2fs_msg(sb, KERN_INFO,
@@ -2635,6 +2655,7 @@ static int read_raw_super_block(struct f2fs_sb_info *sbi,
int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
{
struct buffer_head *bh;
__u32 crc = 0;
int err;
if ((recover && f2fs_readonly(sbi->sb)) ||
@@ -2643,6 +2664,13 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
return -EROFS;
}
/* we should update superblock crc here */
if (!recover && f2fs_sb_has_sb_chksum(sbi->sb)) {
crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
offsetof(struct f2fs_super_block, crc));
F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
}
/* write back-up superblock first */
bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
if (!bh)