X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lib%2Fext2fs%2Fext2fs.h;h=58733413f3052b46e5cf41d5d856b794c441d0cb;hb=c60d513a70d57afbfb20305241d3000f9c698a02;hp=722f8dc73590a19322eb65f65eef9395fb52ddc7;hpb=2ab7d79d28289753be87035f06ec2d346b574759;p=tools%2Fe2fsprogs.git

diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 722f8dc..5873341 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -569,6 +569,7 @@ typedef struct ext2_icount *ext2_icount_t;
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
 					 EXT4_FEATURE_INCOMPAT_MMP|\
 					 EXT4_FEATURE_INCOMPAT_EA_INODE|\
+					 EXT4_FEATURE_INCOMPAT_DIRDATA|\
 					 EXT4_FEATURE_INCOMPAT_64BIT)
 #else
 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP	(EXT2_FEATURE_INCOMPAT_FILETYPE|\
@@ -579,6 +580,7 @@ typedef struct ext2_icount *ext2_icount_t;
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
 					 EXT4_FEATURE_INCOMPAT_MMP|\
 					 EXT4_FEATURE_INCOMPAT_EA_INODE|\
+					 EXT4_FEATURE_INCOMPAT_DIRDATA|\
 					 EXT4_FEATURE_INCOMPAT_64BIT)
 #endif
 #ifdef CONFIG_QUOTA
@@ -1701,6 +1703,25 @@ _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
 	return ext2fs_inode_data_blocks2(fs, inode);
 }
 
+_INLINE_ struct ext2_dx_root_info *get_ext2_dx_root_info(ext2_filsys fs,
+							 char *buf)
+{
+	struct ext2_dir_entry_2 *de = (struct ext2_dir_entry_2 *)buf;
+
+	if (!(fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_DIRDATA))
+		return (struct ext2_dx_root_info *)(buf +
+						    __EXT2_DIR_REC_LEN(1) +
+						    __EXT2_DIR_REC_LEN(2));
+
+	/* get dotdot first */
+	de = (struct ext2_dir_entry_2 *)((char *)de + de->rec_len);
+
+	/* dx root info is after dotdot entry */
+	de = (struct ext2_dir_entry_2 *)((char *)de + EXT2_DIR_REC_LEN(de));
+
+	return (struct ext2_dx_root_info *)de;
+}
+
 /*
  * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
  */