Hi, Jaegeuk On 2018/9/20 7:35, Jaegeuk Kim wrote: > On 09/19, Junling Zheng wrote: >> This patch introduced crc for superblock. >> >> Signed-off-by: Junling Zheng <zhengjunl...@huawei.com> >> --- >> fsck/mount.c | 33 +++++++++++++++++++++++++++++++++ >> fsck/resize.c | 12 ++++++------ >> include/f2fs_fs.h | 6 +++++- >> mkfs/f2fs_format.c | 8 ++++++++ >> 4 files changed, 52 insertions(+), 7 deletions(-) >> >> diff --git a/fsck/mount.c b/fsck/mount.c >> index 74ff7c6..9019921 100644 >> --- a/fsck/mount.c >> +++ b/fsck/mount.c >> @@ -340,6 +340,7 @@ void print_raw_sb_info(struct f2fs_super_block *sb) >> DISP_u32(sb, node_ino); >> DISP_u32(sb, meta_ino); >> DISP_u32(sb, cp_payload); >> + DISP_u32(sb, crc); >> DISP("%-.256s", sb, version); >> printf("\n"); >> } >> @@ -467,6 +468,9 @@ void print_sb_state(struct f2fs_super_block *sb) >> if (f & cpu_to_le32(F2FS_FEATURE_LOST_FOUND)) { >> MSG(0, "%s", " lost_found"); >> } >> + if (f & cpu_to_le32(F2FS_FEATURE_SB_CHKSUM)) { >> + MSG(0, "%s", " sb_checksum"); >> + } >> MSG(0, "\n"); >> MSG(0, "Info: superblock encrypt level = %d, salt = ", >> sb->encryption_level); >> @@ -479,10 +483,20 @@ void update_superblock(struct f2fs_super_block *sb, >> int sb_mask) >> { >> int index, ret; >> u_int8_t *buf; >> + u32 old_crc, new_crc; >> >> buf = calloc(BLOCK_SZ, 1); >> ASSERT(buf); >> >> + if (get_sb(feature) & F2FS_FEATURE_SB_CHKSUM) { >> + old_crc = get_sb(crc); >> + new_crc = f2fs_cal_crc32(F2FS_SUPER_MAGIC, sb, >> + SB_CHKSUM_OFFSET); >> + set_sb(crc, new_crc); >> + MSG(1, "Info: SB CRC is updated (0x%x -> 0x%x)\n", >> + old_crc, new_crc); >> + } >> + >> memcpy(buf + F2FS_SUPER_OFFSET, sb, sizeof(*sb)); >> for (index = 0; index < SB_ADDR_MAX; index++) { >> if ((1 << index) & sb_mask) { >> @@ -575,10 +589,29 @@ static inline int sanity_check_area_boundary(struct >> f2fs_super_block *sb, >> return 0; >> } >> >> +static int verify_sb_chksum(struct f2fs_super_block *sb) >> +{ >> + if (SB_CHKSUM_OFFSET != get_sb(checksum_offset)) { >> + MSG(0, "\tInvalid SB CRC offset: %u\n", >> + get_sb(checksum_offset)); >> + return -1; >> + } >> + if (f2fs_crc_valid(get_sb(crc), sb, >> + get_sb(checksum_offset))) { >> + MSG(0, "\tInvalid SB CRC: 0x%x\n", get_sb(crc)); >> + return -1; >> + } >> + return 0; >> +} >> + >> int sanity_check_raw_super(struct f2fs_super_block *sb, enum SB_ADDR >> sb_addr) >> { >> unsigned int blocksize; >> >> + if ((get_sb(feature) & F2FS_FEATURE_SB_CHKSUM) && >> + verify_sb_chksum(sb)) >> + return -1; >> + >> if (F2FS_SUPER_MAGIC != get_sb(magic)) >> return -1; >> >> diff --git a/fsck/resize.c b/fsck/resize.c >> index 5161a1f..3462165 100644 >> --- a/fsck/resize.c >> +++ b/fsck/resize.c >> @@ -603,9 +603,6 @@ static int f2fs_resize_grow(struct f2fs_sb_info *sbi) >> } >> } >> >> - print_raw_sb_info(sb); >> - print_raw_sb_info(new_sb); > > It'd be worth to keep this to show the previous states. >
Here, I just want to move the printing of sb and new_sb to the place behind update_superblock(), where the crc in sb will be updated. >> - >> old_main_blkaddr = get_sb(main_blkaddr); >> new_main_blkaddr = get_newsb(main_blkaddr); >> offset = new_main_blkaddr - old_main_blkaddr; >> @@ -629,6 +626,9 @@ static int f2fs_resize_grow(struct f2fs_sb_info *sbi) >> migrate_sit(sbi, new_sb, offset_seg); >> rebuild_checkpoint(sbi, new_sb, offset_seg); >> update_superblock(new_sb, SB_ALL); >> + print_raw_sb_info(sb); >> + print_raw_sb_info(new_sb); >> + >> return 0; >> } >> >> @@ -658,9 +658,6 @@ static int f2fs_resize_shrink(struct f2fs_sb_info *sbi) >> } >> } >> >> - print_raw_sb_info(sb); >> - print_raw_sb_info(new_sb); > > Ditto. > >> - >> old_main_blkaddr = get_sb(main_blkaddr); >> new_main_blkaddr = get_newsb(main_blkaddr); >> offset = old_main_blkaddr - new_main_blkaddr; >> @@ -690,6 +687,9 @@ static int f2fs_resize_shrink(struct f2fs_sb_info *sbi) >> /* move whole data region */ >> //if (err) >> // migrate_main(sbi, offset); >> + print_raw_sb_info(sb); >> + print_raw_sb_info(new_sb); >> + >> return 0; >> } >> >> diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h >> index 38a0da4..f80632a 100644 >> --- a/include/f2fs_fs.h >> +++ b/include/f2fs_fs.h >> @@ -279,6 +279,7 @@ static inline uint64_t bswap_64(uint64_t val) >> #define BITS_PER_BYTE 8 >> #define F2FS_SUPER_MAGIC 0xF2F52010 /* F2FS Magic Number */ >> #define CP_CHKSUM_OFFSET 4092 >> +#define SB_CHKSUM_OFFSET 3068 >> #define MAX_PATH_LEN 64 >> #define MAX_DEVICES 8 >> >> @@ -579,6 +580,7 @@ enum { >> #define F2FS_FEATURE_INODE_CRTIME 0x0100 >> #define F2FS_FEATURE_LOST_FOUND 0x0200 >> #define F2FS_FEATURE_VERITY 0x0400 /* reserved */ >> +#define F2FS_FEATURE_SB_CHKSUM 0x0800 >> >> #define MAX_VOLUME_NAME 512 >> >> @@ -632,7 +634,8 @@ struct f2fs_super_block { >> struct f2fs_device devs[MAX_DEVICES]; /* device list */ >> __le32 qf_ino[F2FS_MAX_QUOTAS]; /* quota inode numbers */ >> __u8 hot_ext_count; /* # of hot file extension */ >> - __u8 reserved[314]; /* valid reserved region */ >> + __u8 reserved[310]; /* valid reserved region */ >> + __le32 crc; /* checksum of superblock */ >> } __attribute__((packed)); >> >> /* >> @@ -1338,6 +1341,7 @@ struct feature feature_table[] = { >> \ >> { "inode_crtime", F2FS_FEATURE_INODE_CRTIME }, \ >> { "lost_found", F2FS_FEATURE_LOST_FOUND }, \ >> { "verity", F2FS_FEATURE_VERITY }, /* reserved */ \ >> + { "sb_checksum", F2FS_FEATURE_SB_CHKSUM }, \ >> { NULL, 0x0}, \ >> }; >> >> diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c >> index 621126c..9b0a0d1 100644 >> --- a/mkfs/f2fs_format.c >> +++ b/mkfs/f2fs_format.c >> @@ -504,6 +504,14 @@ static int f2fs_prepare_super_block(void) >> >> sb->feature = c.feature; >> >> + if (get_sb(feature) & F2FS_FEATURE_SB_CHKSUM) { >> + set_sb(checksum_offset, SB_CHKSUM_OFFSET); >> + set_sb(crc, f2fs_cal_crc32(F2FS_SUPER_MAGIC, sb, >> + SB_CHKSUM_OFFSET)); >> + MSG(1, "Info: SB CRC is set: offset (%d), crc (0x%x)\n", >> + get_sb(checksum_offset), get_sb(crc)); >> + } >> + >> return 0; >> } >> >> -- >> 2.19.0 > > . > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel