1 files changed, 12 insertions, 4 deletions

diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 151738af6be2..b77b59fe7f56 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -105,19 +105,25 @@
  */
 struct ext4_group_desc
 {
-        __le32  bg_block_bitmap;                /* Blocks bitmap block */
-        __le32  bg_inode_bitmap;                /* Inodes bitmap block */
+        __le32  bg_block_bitmap;        /* Blocks bitmap block */
+        __le32  bg_inode_bitmap;        /* Inodes bitmap block */
         __le32  bg_inode_table;         /* Inodes table block */
         __le16  bg_free_blocks_count;   /* Free blocks count */
         __le16  bg_free_inodes_count;   /* Free inodes count */
         __le16  bg_used_dirs_count;     /* Directories count */
-        __u16   bg_flags;
-        __u32   bg_reserved[3];
+        __le16  bg_flags;               /* EXT4_BG_flags (INODE_UNINIT, etc) */
+        __u32   bg_reserved[2];         /* Likely block/inode bitmap checksum */
+        __le16  bg_itable_unused;       /* Unused inodes count */
+        __le16  bg_checksum;            /* crc16(sb_uuid+group+desc) */
         __le32  bg_block_bitmap_hi;     /* Blocks bitmap block MSB */
         __le32  bg_inode_bitmap_hi;     /* Inodes bitmap block MSB */
         __le32  bg_inode_table_hi;      /* Inodes table block MSB */
 };
 
+#define EXT4_BG_INODE_UNINIT    0x0001 /* Inode table/bitmap not in use */
+#define EXT4_BG_BLOCK_UNINIT    0x0002 /* Block bitmap not in use */
+#define EXT4_BG_INODE_ZEROED    0x0004 /* On-disk itable initialized to zero */
+
 #ifdef __KERNEL__
 #include <linux/ext4_fs_i.h>
 #include <linux/ext4_fs_sb.h>
@@ -665,6 +671,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
 #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE       0x0002
 #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR        0x0004
+#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM         0x0010
 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK        0x0020
 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE      0x0040
 
@@ -684,6 +691,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
                                          EXT4_FEATURE_INCOMPAT_64BIT)
 #define EXT4_FEATURE_RO_COMPAT_SUPP     (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
                                          EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
+                                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
                                          EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
                                          EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
                                          EXT4_FEATURE_RO_COMPAT_BTREE_DIR)