Keep in sync with the related kernel commits:
commit 61ba89b57905 ("erofs: add 48-bit block addressing on-disk support")
commit efb2aef569b3 ("erofs: add encoded extent on-disk definition")

Signed-off-by: Gao Xiang <hsiang...@linux.alibaba.com>
---
 include/erofs/internal.h |   4 +-
 include/erofs_fs.h       | 191 ++++++++++++++++++---------------------
 lib/blobchunk.c          |  20 ++--
 lib/compress.c           |   2 +-
 lib/data.c               |   8 +-
 lib/inode.c              |   6 +-
 lib/namei.c              |   4 +-
 lib/super.c              |  16 ++--
 lib/zmap.c               |   2 +-
 9 files changed, 119 insertions(+), 134 deletions(-)

diff --git a/include/erofs/internal.h b/include/erofs/internal.h
index 244aa82..8c6de13 100644
--- a/include/erofs/internal.h
+++ b/include/erofs/internal.h
@@ -59,8 +59,8 @@ struct erofs_bufmgr;
 
 struct erofs_device_info {
        u8 tag[64];
-       u32 blocks;
-       u32 mapped_blkaddr;
+       erofs_blk_t blocks;
+       erofs_blk_t uniaddr;
 };
 
 /* all filesystem-wide lz4 configurations */
diff --git a/include/erofs_fs.h b/include/erofs_fs.h
index 269d302..ce319d7 100644
--- a/include/erofs_fs.h
+++ b/include/erofs_fs.h
@@ -31,25 +31,19 @@
 #define EROFS_FEATURE_INCOMPAT_FRAGMENTS       0x00000020
 #define EROFS_FEATURE_INCOMPAT_DEDUPE          0x00000020
 #define EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES  0x00000040
+#define EROFS_FEATURE_INCOMPAT_48BIT           0x00000080
 #define EROFS_ALL_FEATURE_INCOMPAT             \
-       (EROFS_FEATURE_INCOMPAT_ZERO_PADDING | \
-        EROFS_FEATURE_INCOMPAT_COMPR_CFGS | \
-        EROFS_FEATURE_INCOMPAT_BIG_PCLUSTER | \
-        EROFS_FEATURE_INCOMPAT_CHUNKED_FILE | \
-        EROFS_FEATURE_INCOMPAT_DEVICE_TABLE | \
-        EROFS_FEATURE_INCOMPAT_COMPR_HEAD2 | \
-        EROFS_FEATURE_INCOMPAT_ZTAILPACKING | \
-        EROFS_FEATURE_INCOMPAT_FRAGMENTS | \
-        EROFS_FEATURE_INCOMPAT_DEDUPE | \
-        EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES)
+       ((EROFS_FEATURE_INCOMPAT_48BIT << 1) - 1)
 
 #define EROFS_SB_EXTSLOT_SIZE  16
 
 struct erofs_deviceslot {
        u8 tag[64];             /* digest(sha256), etc. */
-       __le32 blocks;          /* total fs blocks of this device */
-       __le32 mapped_blkaddr;  /* map starting at mapped_blkaddr */
-       u8 reserved[56];
+       __le32 blocks_lo;       /* total blocks count of this device */
+       __le32 uniaddr_lo;      /* unified starting block of this device */
+       __le32 blocks_hi;       /* total blocks count MSB */
+       __le16 uniaddr_hi;      /* unified starting block MSB */
+       u8 reserved[50];
 };
 #define EROFS_DEVT_SLOT_SIZE   sizeof(struct erofs_deviceslot)
 
@@ -60,13 +54,14 @@ struct erofs_super_block {
        __le32 feature_compat;
        __u8 blkszbits;         /* filesystem block size in bit shift */
        __u8 sb_extslots;       /* superblock size = 128 + sb_extslots * 16 */
-
-       __le16 root_nid;        /* nid of root directory */
+       union {
+               __le16 rootnid_2b;      /* nid of root directory */
+               __le16 blocks_hi;       /* (48BIT on) blocks count MSB */
+       } rb;
        __le64 inos;            /* total valid ino # (== f_files - f_favail) */
-
-       __le64 build_time;      /* compact inode time derivation */
-       __le32 build_time_nsec; /* compact inode time derivation in ns scale */
-       __le32 blocks;          /* used for statfs */
+       __le64 epoch;           /* base seconds used for compact inodes */
+       __le32 fixed_nsec;      /* fixed nanoseconds for compact inodes */
+       __le32 blocks_lo;       /* blocks count LSB */
        __le32 meta_blkaddr;    /* start block address of metadata area */
        __le32 xattr_blkaddr;   /* start block address of shared xattr area */
        __u8 uuid[16];          /* 128-bit uuid for volume */
@@ -85,7 +80,10 @@ struct erofs_super_block {
        __le32 xattr_prefix_start;      /* start of long xattr prefixes */
        __le64 packed_nid;      /* nid of the special packed inode */
        __u8 xattr_filter_reserved; /* reserved for xattr name filter */
-       __u8 reserved2[23];
+       __u8 reserved[3];
+       __le32 build_time;      /* seconds added to epoch for mkfs time */
+       __le64 rootnid_8b;      /* (48BIT on) nid of root directory */
+       __u8 reserved2[8];
 };
 
 /*
@@ -116,19 +114,19 @@ static inline bool 
erofs_inode_is_data_compressed(unsigned int datamode)
 #define EROFS_I_VERSION_MASK            0x01
 #define EROFS_I_DATALAYOUT_MASK         0x07
 
-#define EROFS_I_VERSION_BIT             0
-#define EROFS_I_DATALAYOUT_BIT          1
-#define EROFS_I_ALL_BIT                        4
-
-#define EROFS_I_ALL    ((1 << EROFS_I_ALL_BIT) - 1)
+#define EROFS_I_VERSION_BIT    0
+#define EROFS_I_DATALAYOUT_BIT 1
+#define EROFS_I_NLINK_1_BIT    4       /* non-directory compact inodes only */
+#define EROFS_I_DOT_OMITTED_BIT        4       /* (directories) omit the `.` 
dirent */
+#define EROFS_I_ALL            ((1 << (EROFS_I_NLINK_1_BIT + 1)) - 1)
 
 /* indicate chunk blkbits, thus 'chunksize = blocksize << chunk blkbits' */
 #define EROFS_CHUNK_FORMAT_BLKBITS_MASK                0x001F
-/* with chunk indexes or just a 4-byte blkaddr array */
+/* with chunk indexes or just a 4-byte block array */
 #define EROFS_CHUNK_FORMAT_INDEXES             0x0020
+#define EROFS_CHUNK_FORMAT_48BIT               0x0040
 
-#define EROFS_CHUNK_FORMAT_ALL \
-       (EROFS_CHUNK_FORMAT_BLKBITS_MASK | EROFS_CHUNK_FORMAT_INDEXES)
+#define EROFS_CHUNK_FORMAT_ALL ((EROFS_CHUNK_FORMAT_48BIT << 1) - 1)
 
 /* 32-byte on-disk inode */
 #define EROFS_INODE_LAYOUT_COMPACT     0
@@ -141,45 +139,40 @@ struct erofs_inode_chunk_info {
 };
 
 union erofs_inode_i_u {
-       /* total compressed blocks for compressed inodes */
-       __le32 compressed_blocks;
-
-       /* block address for uncompressed flat inodes */
-       __le32 raw_blkaddr;
-
-       /* for device files, used to indicate old/new device # */
-       __le32 rdev;
-
-       /* for chunk-based files, it contains the summary info */
+       __le32 blocks_lo;       /* total blocks count (if compressed inodes) */
+       __le32 startblk_lo;     /* starting block number (if flat inodes) */
+       __le32 rdev;            /* device ID (if special inodes) */
        struct erofs_inode_chunk_info c;
 };
 
+union erofs_inode_i_nb {
+       __le16 nlink;           /* if EROFS_I_NLINK_1_BIT is unset */
+       __le16 blocks_hi;       /* total blocks count MSB */
+       __le16 startblk_hi;     /* starting block number MSB */
+};
+
 /* 32-byte reduced form of an ondisk inode */
 struct erofs_inode_compact {
        __le16 i_format;        /* inode format hints */
-
-/* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
        __le16 i_xattr_icount;
        __le16 i_mode;
-       __le16 i_nlink;
+       union erofs_inode_i_nb i_nb;
        __le32 i_size;
-       __le32 i_reserved;
+       __le32 i_mtime;
        union erofs_inode_i_u i_u;
 
        __le32 i_ino;           /* only used for 32-bit stat compatibility */
        __le16 i_uid;
        __le16 i_gid;
-       __le32 i_reserved2;
+       __le32 i_reserved;
 };
 
 /* 64-byte complete form of an ondisk inode */
 struct erofs_inode_extended {
        __le16 i_format;        /* inode format hints */
-
-/* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
        __le16 i_xattr_icount;
        __le16 i_mode;
-       __le16 i_reserved;
+       union erofs_inode_i_nb i_nb;
        __le64 i_size;
        union erofs_inode_i_u i_u;
 
@@ -249,6 +242,7 @@ static inline unsigned int erofs_xattr_ibody_size(__le16 
i_xattr_icount)
        if (!i_xattr_icount)
                return 0;
 
+       /* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
        return sizeof(struct erofs_xattr_ibody_header) +
                sizeof(__u32) * (le16_to_cpu(i_xattr_icount) - 1);
 }
@@ -267,11 +261,11 @@ static inline unsigned int erofs_xattr_entry_size(struct 
erofs_xattr_entry *e)
 /* 4-byte block address array */
 #define EROFS_BLOCK_MAP_ENTRY_SIZE     sizeof(__le32)
 
-/* 8-byte inode chunk indexes */
+/* 8-byte inode chunk index */
 struct erofs_inode_chunk_index {
-       __le16 advise;          /* always 0, don't care for now */
+       __le16 startblk_hi;     /* starting block number MSB */
        __le16 device_id;       /* back-end storage id (with bits masked) */
-       __le32 blkaddr;         /* start block address of this inode chunk */
+       __le32 startblk_lo;     /* starting block number of this chunk */
 };
 
 /* dirent sorts in alphabet order, thus we can do binary search */
@@ -345,21 +339,20 @@ struct z_erofs_zstd_cfgs {
 #define Z_EROFS_ZSTD_MAX_DICT_SIZE      Z_EROFS_PCLUSTER_MAX_SIZE
 
 /*
- * bit 0 : COMPACTED_2B indexes (0 - off; 1 - on)
- *  e.g. for 4k logical cluster size,      4B        if compacted 2B is off;
- *                                  (4B) + 2B + (4B) if compacted 2B is on.
- * bit 1 : HEAD1 big pcluster (0 - off; 1 - on)
- * bit 2 : HEAD2 big pcluster (0 - off; 1 - on)
- * bit 3 : tailpacking inline pcluster (0 - off; 1 - on)
- * bit 4 : interlaced plain pcluster (0 - off; 1 - on)
- * bit 5 : fragment pcluster (0 - off; 1 - on)
+ * Enable COMPACTED_2B for EROFS_INODE_COMPRESSED_COMPACT inodes:
+ *   4B (disabled) vs 4B+2B+4B (enabled)
  */
 #define Z_EROFS_ADVISE_COMPACTED_2B            0x0001
+/* Enable extent metadata for EROFS_INODE_COMPRESSED_FULL inodes */
+#define Z_EROFS_ADVISE_EXTENTS                 0x0001
 #define Z_EROFS_ADVISE_BIG_PCLUSTER_1          0x0002
 #define Z_EROFS_ADVISE_BIG_PCLUSTER_2          0x0004
 #define Z_EROFS_ADVISE_INLINE_PCLUSTER         0x0008
 #define Z_EROFS_ADVISE_INTERLACED_PCLUSTER     0x0010
 #define Z_EROFS_ADVISE_FRAGMENT_PCLUSTER       0x0020
+/* Indicate the record size for each extent if extent metadata is used */
+#define Z_EROFS_ADVISE_EXTRECSZ_BIT            1
+#define Z_EROFS_ADVISE_EXTRECSZ_MASK           0x3
 
 #define Z_EROFS_FRAGMENT_INODE_BIT              7
 struct z_erofs_map_header {
@@ -371,45 +364,24 @@ struct z_erofs_map_header {
                        /* indicates the encoded size of tailpacking data */
                        __le16  h_idata_size;
                };
+               __le32 h_extents_lo;    /* extent count LSB */
        };
        __le16  h_advise;
-       /*
-        * bit 0-3 : algorithm type of head 1 (logical cluster type 01);
-        * bit 4-7 : algorithm type of head 2 (logical cluster type 11).
-        */
-       __u8    h_algorithmtype;
-       /*
-        * bit 0-2 : logical cluster bits - 12, e.g. 0 for 4096;
-        * bit 3-6 : reserved;
-        * bit 7   : move the whole file into packed inode or not.
-        */
-       __u8    h_clusterbits;
+       union {
+               struct {
+                       /* algorithm type (bit 0-3: HEAD1; bit 4-7: HEAD2) */
+                       __u8    h_algorithmtype;
+                       /*
+                        * bit 0-3 : logical cluster bits - blkszbits
+                        * bit 4-6 : reserved
+                        * bit 7   : pack the whole file into packed inode
+                        */
+                       __u8    h_clusterbits;
+               };
+               __le16 h_extents_hi;    /* extent count MSB */
+       };
 };
 
-/*
- * On-disk logical cluster type:
- *    0   - literal (uncompressed) lcluster
- *    1,3 - compressed lcluster (for HEAD lclusters)
- *    2   - compressed lcluster (for NONHEAD lclusters)
- *
- * In detail,
- *    0 - literal (uncompressed) lcluster,
- *        di_advise = 0
- *        di_clusterofs = the literal data offset of the lcluster
- *        di_blkaddr = the blkaddr of the literal pcluster
- *
- *    1,3 - compressed lcluster (for HEAD lclusters)
- *        di_advise = 1 or 3
- *        di_clusterofs = the decompressed data offset of the lcluster
- *        di_blkaddr = the blkaddr of the compressed pcluster
- *
- *    2 - compressed lcluster (for NONHEAD lclusters)
- *        di_advise = 2
- *        di_clusterofs =
- *           the decompressed data offset in its own HEAD lcluster
- *        di_u.delta[0] = distance to this HEAD lcluster
- *        di_u.delta[1] = distance to the next HEAD lcluster
- */
 enum {
        Z_EROFS_LCLUSTER_TYPE_PLAIN     = 0,
        Z_EROFS_LCLUSTER_TYPE_HEAD1     = 1,
@@ -423,11 +395,7 @@ enum {
 /* (noncompact only, HEAD) This pcluster refers to partial decompressed data */
 #define Z_EROFS_LI_PARTIAL_REF         (1 << 15)
 
-/*
- * D0_CBLKCNT will be marked _only_ at the 1st non-head lcluster to store the
- * compressed block count of a compressed extent (in logical clusters, aka.
- * block count of a pcluster).
- */
+/* Set on 1st non-head lcluster to store compressed block counti (in blocks) */
 #define Z_EROFS_LI_D0_CBLKCNT          (1 << 11)
 
 struct z_erofs_lcluster_index {
@@ -436,19 +404,36 @@ struct z_erofs_lcluster_index {
        __le16 di_clusterofs;
 
        union {
-               /* for the HEAD lclusters */
-               __le32 blkaddr;
+               __le32 blkaddr;         /* for the HEAD lclusters */
                /*
-                * for the NONHEAD lclusters
                 * [0] - distance to its HEAD lcluster
                 * [1] - distance to the next HEAD lcluster
                 */
-               __le16 delta[2];
+               __le16 delta[2];        /* for the NONHEAD lclusters */
        } di_u;
 };
 
-#define Z_EROFS_FULL_INDEX_ALIGN(end)  \
-       (round_up(end, 8) + sizeof(struct z_erofs_map_header) + 8)
+#define Z_EROFS_MAP_HEADER_END(end)    \
+       (round_up(end, 8) + sizeof(struct z_erofs_map_header))
+#define Z_EROFS_FULL_INDEX_START(end)  (Z_EROFS_MAP_HEADER_END(end) + 8)
+
+#define Z_EROFS_EXTENT_PLEN_PARTIAL    BIT(27)
+#define Z_EROFS_EXTENT_PLEN_FMT_BIT    28
+#define Z_EROFS_EXTENT_PLEN_MASK       ((Z_EROFS_PCLUSTER_MAX_SIZE << 1) - 1)
+struct z_erofs_extent {
+       __le32 plen;            /* encoded length */
+       __le32 pstart_lo;       /* physical offset */
+       __le32 pstart_hi;       /* physical offset MSB */
+       __le32 lstart_lo;       /* logical offset */
+       __le32 lstart_hi;       /* logical offset MSB (>= 4GiB inodes) */
+       __u8 reserved[12];      /* for future use */
+};
+
+static inline int z_erofs_extent_recsize(unsigned int advise)
+{
+       return 4 << ((advise >> Z_EROFS_ADVISE_EXTRECSZ_BIT) &
+               Z_EROFS_ADVISE_EXTRECSZ_MASK);
+}
 
 /* check the EROFS on-disk layout strictly at compile time */
 static inline void erofs_check_ondisk_layout_definitions(void)
diff --git a/lib/blobchunk.c b/lib/blobchunk.c
index de9150f..0b7d8a9 100644
--- a/lib/blobchunk.c
+++ b/lib/blobchunk.c
@@ -159,32 +159,32 @@ int erofs_blob_write_chunk_indexes(struct erofs_inode 
*inode,
                chunk = *(void **)(inode->chunkindexes + src);
 
                if (chunk->blkaddr == EROFS_NULL_ADDR) {
-                       idx.blkaddr = EROFS_NULL_ADDR;
+                       idx.startblk_lo = EROFS_NULL_ADDR;
                } else if (chunk->device_id) {
                        DBG_BUGON(!(inode->u.chunkformat & 
EROFS_CHUNK_FORMAT_INDEXES));
-                       idx.blkaddr = chunk->blkaddr;
+                       idx.startblk_lo = chunk->blkaddr;
                        extent_start = EROFS_NULL_ADDR;
                } else {
-                       idx.blkaddr = remapped_base + chunk->blkaddr;
+                       idx.startblk_lo = remapped_base + chunk->blkaddr;
                }
 
                if (extent_start == EROFS_NULL_ADDR ||
-                   idx.blkaddr != extent_end) {
+                   idx.startblk_lo != extent_end) {
                        if (extent_start != EROFS_NULL_ADDR) {
                                remaining_blks -= extent_end - extent_start;
                                tarerofs_blocklist_write(extent_start,
                                                extent_end - extent_start,
                                                source_offset, 0);
                        }
-                       extent_start = idx.blkaddr;
+                       extent_start = idx.startblk_lo;
                        source_offset = chunk->sourceoffset;
                }
-               extent_end = idx.blkaddr + chunkblks;
+               extent_end = idx.startblk_lo + chunkblks;
                idx.device_id = cpu_to_le16(chunk->device_id);
-               idx.blkaddr = cpu_to_le32(idx.blkaddr);
+               idx.startblk_lo = cpu_to_le32(idx.startblk_lo);
 
                if (unit == EROFS_BLOCK_MAP_ENTRY_SIZE)
-                       memcpy(inode->chunkindexes + dst, &idx.blkaddr, unit);
+                       memcpy(inode->chunkindexes + dst, &idx.startblk_lo, 
unit);
                else
                        memcpy(inode->chunkindexes + dst, &idx, sizeof(idx));
        }
@@ -502,8 +502,8 @@ int erofs_mkfs_dump_blobs(struct erofs_sb_info *sbi)
                i = 0;
                do {
                        struct erofs_deviceslot dis = {
-                               .mapped_blkaddr = cpu_to_le32(nblocks),
-                               .blocks = cpu_to_le32(sbi->devs[i].blocks),
+                               .uniaddr_lo = cpu_to_le32(nblocks),
+                               .blocks_lo = cpu_to_le32(sbi->devs[i].blocks),
                        };
 
                        memcpy(dis.tag, sbi->devs[i].tag, sizeof(dis.tag));
diff --git a/lib/compress.c b/lib/compress.c
index d046112..30bcdd4 100644
--- a/lib/compress.c
+++ b/lib/compress.c
@@ -120,7 +120,7 @@ static struct {
 
 static bool z_erofs_mt_enabled;
 
-#define Z_EROFS_LEGACY_MAP_HEADER_SIZE Z_EROFS_FULL_INDEX_ALIGN(0)
+#define Z_EROFS_LEGACY_MAP_HEADER_SIZE Z_EROFS_FULL_INDEX_START(0)
 
 static void z_erofs_fini_full_indexes(struct z_erofs_compress_ictx *ctx)
 {
diff --git a/lib/data.c b/lib/data.c
index fd9c21a..6f6db6d 100644
--- a/lib/data.c
+++ b/lib/data.c
@@ -117,14 +117,14 @@ int __erofs_map_blocks(struct erofs_inode *inode,
        }
        /* parse chunk indexes */
        idx = (void *)buf + erofs_blkoff(sbi, pos);
-       switch (le32_to_cpu(idx->blkaddr)) {
+       switch (le32_to_cpu(idx->startblk_lo)) {
        case EROFS_NULL_ADDR:
                map->m_flags = 0;
                break;
        default:
                map->m_deviceid = le16_to_cpu(idx->device_id) &
                        sbi->device_id_mask;
-               map->m_pa = erofs_pos(sbi, le32_to_cpu(idx->blkaddr));
+               map->m_pa = erofs_pos(sbi, le32_to_cpu(idx->startblk_lo));
                map->m_flags = EROFS_MAP_MAPPED;
                break;
        }
@@ -154,9 +154,9 @@ int erofs_map_dev(struct erofs_sb_info *sbi, struct 
erofs_map_dev *map)
                        erofs_off_t startoff, length;
 
                        dif = sbi->devs + id;
-                       if (!dif->mapped_blkaddr)
+                       if (!dif->uniaddr)
                                continue;
-                       startoff = erofs_pos(sbi, dif->mapped_blkaddr);
+                       startoff = erofs_pos(sbi, dif->uniaddr);
                        length = erofs_pos(sbi, dif->blocks);
 
                        if (map->m_pa >= startoff &&
diff --git a/lib/inode.c b/lib/inode.c
index f99cbb0..15391ec 100644
--- a/lib/inode.c
+++ b/lib/inode.c
@@ -603,18 +603,18 @@ int erofs_iflush(struct erofs_inode *inode)
            S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
                u1.rdev = cpu_to_le32(inode->u.i_rdev);
        else if (is_inode_layout_compression(inode))
-               u1.compressed_blocks = cpu_to_le32(inode->u.i_blocks);
+               u1.blocks_lo = cpu_to_le32(inode->u.i_blocks);
        else if (inode->datalayout == EROFS_INODE_CHUNK_BASED)
                u1.c.format = cpu_to_le16(inode->u.chunkformat);
        else
-               u1.raw_blkaddr = cpu_to_le32(inode->u.i_blkaddr);
+               u1.startblk_lo = cpu_to_le32(inode->u.i_blkaddr);
 
        switch (inode->inode_isize) {
        case sizeof(struct erofs_inode_compact):
                u.dic.i_format = cpu_to_le16(0 | (inode->datalayout << 1));
                u.dic.i_xattr_icount = cpu_to_le16(icount);
                u.dic.i_mode = cpu_to_le16(inode->i_mode);
-               u.dic.i_nlink = cpu_to_le16(inode->i_nlink);
+               u.dic.i_nb.nlink = cpu_to_le16(inode->i_nlink);
                u.dic.i_size = cpu_to_le32((u32)inode->i_size);
 
                u.dic.i_ino = cpu_to_le32(inode->i_ino[0]);
diff --git a/lib/namei.c b/lib/namei.c
index b40f092..66b8eef 100644
--- a/lib/namei.c
+++ b/lib/namei.c
@@ -77,7 +77,7 @@ int erofs_read_inode_from_disk(struct erofs_inode *vi)
                iu = dic->i_u;
                vi->i_uid = le16_to_cpu(dic->i_uid);
                vi->i_gid = le16_to_cpu(dic->i_gid);
-               vi->i_nlink = le16_to_cpu(dic->i_nlink);
+               vi->i_nlink = le16_to_cpu(dic->i_nb.nlink);
 
                vi->i_mtime = sbi->build_time;
                vi->i_mtime_nsec = sbi->build_time_nsec;
@@ -94,7 +94,7 @@ int erofs_read_inode_from_disk(struct erofs_inode *vi)
        case S_IFREG:
        case S_IFDIR:
        case S_IFLNK:
-               vi->u.i_blkaddr = le32_to_cpu(iu.raw_blkaddr);
+               vi->u.i_blkaddr = le32_to_cpu(iu.startblk_lo);
                break;
        case S_IFCHR:
        case S_IFBLK:
diff --git a/lib/super.c b/lib/super.c
index 6c8fa52..00a1683 100644
--- a/lib/super.c
+++ b/lib/super.c
@@ -63,8 +63,8 @@ static int erofs_init_devices(struct erofs_sb_info *sbi,
                        return ret;
                }
 
-               sbi->devs[i].mapped_blkaddr = le32_to_cpu(dis.mapped_blkaddr);
-               sbi->devs[i].blocks = le32_to_cpu(dis.blocks);
+               sbi->devs[i].uniaddr = le32_to_cpu(dis.uniaddr_lo);
+               sbi->devs[i].blocks = le32_to_cpu(dis.blocks_lo);
                memcpy(sbi->devs[i].tag, dis.tag, sizeof(dis.tag));
                sbi->total_blocks += sbi->devs[i].blocks;
                pos += EROFS_DEVT_SLOT_SIZE;
@@ -110,19 +110,19 @@ int erofs_read_superblock(struct erofs_sb_info *sbi)
                          dsb->sb_extslots);
                return -EINVAL;
        }
-       sbi->primarydevice_blocks = le32_to_cpu(dsb->blocks);
+       sbi->primarydevice_blocks = le32_to_cpu(dsb->blocks_lo);
        sbi->meta_blkaddr = le32_to_cpu(dsb->meta_blkaddr);
        sbi->xattr_blkaddr = le32_to_cpu(dsb->xattr_blkaddr);
        sbi->xattr_prefix_start = le32_to_cpu(dsb->xattr_prefix_start);
        sbi->xattr_prefix_count = dsb->xattr_prefix_count;
        sbi->islotbits = EROFS_ISLOTBITS;
-       sbi->root_nid = le16_to_cpu(dsb->root_nid);
+       sbi->root_nid = le16_to_cpu(dsb->rb.rootnid_2b);
        sbi->packed_nid = le64_to_cpu(dsb->packed_nid);
        sbi->inos = le64_to_cpu(dsb->inos);
        sbi->checksum = le32_to_cpu(dsb->checksum);
 
        sbi->build_time = le64_to_cpu(dsb->build_time);
-       sbi->build_time_nsec = le32_to_cpu(dsb->build_time_nsec);
+       sbi->build_time_nsec = le32_to_cpu(dsb->fixed_nsec);
 
        memcpy(&sbi->uuid, dsb->uuid, sizeof(dsb->uuid));
 
@@ -161,10 +161,10 @@ int erofs_writesb(struct erofs_sb_info *sbi, struct 
erofs_buffer_head *sb_bh,
        struct erofs_super_block sb = {
                .magic     = cpu_to_le32(EROFS_SUPER_MAGIC_V1),
                .blkszbits = sbi->blkszbits,
-               .root_nid  = cpu_to_le16(sbi->root_nid),
+               .rb.rootnid_2b  = cpu_to_le16(sbi->root_nid),
                .inos      = cpu_to_le64(sbi->inos),
                .build_time = cpu_to_le64(sbi->build_time),
-               .build_time_nsec = cpu_to_le32(sbi->build_time_nsec),
+               .fixed_nsec = cpu_to_le32(sbi->build_time_nsec),
                .meta_blkaddr  = cpu_to_le32(sbi->meta_blkaddr),
                .xattr_blkaddr = cpu_to_le32(sbi->xattr_blkaddr),
                .xattr_prefix_count = sbi->xattr_prefix_count,
@@ -181,7 +181,7 @@ int erofs_writesb(struct erofs_sb_info *sbi, struct 
erofs_buffer_head *sb_bh,
        int ret;
 
        *blocks         = erofs_mapbh(sbi->bmgr, NULL);
-       sb.blocks       = cpu_to_le32(*blocks);
+       sb.blocks_lo    = cpu_to_le32(*blocks);
        memcpy(sb.uuid, sbi->uuid, sizeof(sb.uuid));
        memcpy(sb.volume_name, sbi->volume_name, sizeof(sb.volume_name));
 
diff --git a/lib/zmap.c b/lib/zmap.c
index 07c6a83..8383385 100644
--- a/lib/zmap.c
+++ b/lib/zmap.c
@@ -30,7 +30,7 @@ static int z_erofs_load_full_lcluster(struct 
z_erofs_maprecorder *m,
 {
        struct erofs_inode *const vi = m->inode;
        struct erofs_sb_info *sbi = vi->sbi;
-       const erofs_off_t pos = Z_EROFS_FULL_INDEX_ALIGN(erofs_iloc(vi) +
+       const erofs_off_t pos = Z_EROFS_FULL_INDEX_START(erofs_iloc(vi) +
                        vi->inode_isize + vi->xattr_isize) +
                        lcn * sizeof(struct z_erofs_lcluster_index);
        erofs_blk_t eblk = erofs_blknr(sbi, pos);
-- 
2.43.5


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