This patch introduced crc for superblock.
Signed-off-by: Junling Zheng <zhengjunl...@huawei.com>
---
fsck/mount.c | 23 +++++++++++++++++++++++
fsck/resize.c | 12 ++++++------
include/f2fs_fs.h | 16 +++++++++++++++-
mkfs/f2fs_format.c | 3 +++
4 files changed, 47 insertions(+), 7 deletions(-)
diff --git a/fsck/mount.c b/fsck/mount.c
index e7ceb8d..af9b219 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);
@@ -555,10 +559,29 @@ 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);
-
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);
-
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 b0d9b9b..556d526 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));
/*
@@ -1337,6 +1340,7 @@ 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}, \
};
@@ -1424,10 +1428,20 @@ static inline int __write_superblock(struct
f2fs_super_block *sb, int sb_mask)
{
int index, ret;
u_int8_t *buf;
+ u32 old_crc, new_crc;
buf = calloc(F2FS_BLKSIZE, 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(0, "Info: SB CRC is set successfully"
+ "(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) {
diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
index 7e3846e..87e33da 100644
--- a/mkfs/f2fs_format.c
+++ b/mkfs/f2fs_format.c
@@ -504,6 +504,9 @@ 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);
+
return 0;
}
--
2.18.0
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
