diff --git a/e2fsck/e2fsck.h b/e2fsck/e2fsck.h
index 58a862c..40cc128 100644
--- a/e2fsck/e2fsck.h
+++ b/e2fsck/e2fsck.h
@@ -231,6 +231,7 @@ struct e2fsck_struct {
 	ext2fs_inode_bitmap inode_reg_map; /* Inodes which are regular files*/
 
 	ext2fs_block_bitmap block_found_map; /* Blocks which are in use */
+	ext2fs_block_bitmap block_excluded_map; /* Blocks which are excluded */
 	ext2fs_block_bitmap block_dup_map; /* Blks referenced more than once */
 	ext2fs_block_bitmap block_ea_map; /* Blocks which are used by EA's */
 
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index af35e83..3cad69e 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -79,7 +79,7 @@ static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
 struct process_block_struct {
 	ext2_ino_t	ino;
 	unsigned	is_dir:1, is_reg:1, clear:1, suppress:1,
-				fragmented:1, compressed:1, bbcheck:1;
+			fragmented:1, compressed:1, bbcheck:1, excluded:1;
 	blk_t		num_blocks;
 	blk_t		max_blocks;
 	e2_blkcnt_t	last_block;
@@ -626,6 +626,16 @@ void e2fsck_pass1(e2fsck_t ctx)
 		ctx->flags |= E2F_FLAG_ABORT;
 		return;
 	}
+	if (sb->s_feature_compat & NEXT3_FEATURE_COMPAT_EXCLUDE_INODE)
+		pctx.errcode = ext2fs_allocate_block_bitmap(fs,
+				_("excluded block map"),
+				&ctx->block_excluded_map);
+	if (pctx.errcode) {
+		pctx.num = 1;
+		fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
+		ctx->flags |= E2F_FLAG_ABORT;
+		return;
+	}
 	e2fsck_setup_tdb_icount(ctx, 0, &ctx->inode_link_info);
 	if (!ctx->inode_link_info)
 		pctx.errcode = ext2fs_create_icount2(fs, 0, 0, 0,
@@ -1910,6 +1920,11 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
 	pb.previous_block = 0;
 	pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
 	pb.is_reg = LINUX_S_ISREG(inode->i_mode);
+	/* mark snapshot file blocks excluded */
+	pb.excluded = (pb.is_reg &&
+			(inode->i_flags & NEXT3_SNAPFILE_FL) &&
+			(fs->super->s_feature_compat &
+			 NEXT3_FEATURE_COMPAT_EXCLUDE_INODE));
 	pb.max_blocks = 1 << (31 - fs->super->s_log_block_size);
 	pb.inode = inode;
 	pb.pctx = pctx;
@@ -2242,6 +2257,8 @@ static int process_block(ext2_filsys fs,
 			mark_block_used(ctx, blk);
 	} else
 		mark_block_used(ctx, blk);
+	if (p->excluded && ctx->block_excluded_map)
+		ext2fs_fast_mark_block_bitmap(ctx->block_excluded_map, blk);
 	p->num_blocks++;
 	if (blockcnt >= 0)
 		p->last_block = blockcnt;
diff --git a/e2fsck/pass5.c b/e2fsck/pass5.c
index 2b4673f..3cc61b4 100644
--- a/e2fsck/pass5.c
+++ b/e2fsck/pass5.c
@@ -14,6 +14,7 @@
 #include "problem.h"
 
 static void check_block_bitmaps(e2fsck_t ctx);
+static void check_exclude_bitmaps(e2fsck_t ctx);
 static void check_inode_bitmaps(e2fsck_t ctx);
 static void check_inode_end(e2fsck_t ctx);
 static void check_block_end(e2fsck_t ctx);
@@ -44,6 +45,9 @@ void e2fsck_pass5(e2fsck_t ctx)
 	check_block_bitmaps(ctx);
 	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
 		return;
+	check_exclude_bitmaps(ctx);
+	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+		return;
 	check_inode_bitmaps(ctx);
 	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
 		return;
@@ -60,6 +64,9 @@ void e2fsck_pass5(e2fsck_t ctx)
 	ctx->inode_dir_map = 0;
 	ext2fs_free_block_bitmap(ctx->block_found_map);
 	ctx->block_found_map = 0;
+	if (ctx->block_excluded_map)
+		ext2fs_free_block_bitmap(ctx->block_excluded_map);
+	ctx->block_excluded_map = 0;
 
 	print_resource_track(ctx, _("Pass 5"), &rtrack, ctx->fs->io);
 }
@@ -82,6 +89,18 @@ static void print_bitmap_problem(e2fsck_t ctx, int problem,
 		else
 			problem = PR_5_BLOCK_RANGE_USED;
 		break;
+	case PR_5_BLOCK_NOTEXCLUDED:
+		if (pctx->blk == pctx->blk2)
+			pctx->blk2 = 0;
+		else
+			problem = PR_5_BLOCK_RANGE_NOTEXCLUDED;
+		break;
+	case PR_5_BLOCK_EXCLUDED:
+		if (pctx->blk == pctx->blk2)
+			pctx->blk2 = 0;
+		else
+			problem = PR_5_BLOCK_RANGE_EXCLUDED;
+		break;
 	case PR_5_INODE_UNUSED:
 		if (pctx->ino == pctx->ino2)
 			pctx->ino2 = 0;
@@ -368,6 +387,134 @@ errout:
 	ext2fs_free_mem(&free_array);
 }
 
+static void check_exclude_bitmaps(e2fsck_t ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	blk_t	i;
+	int	group = 0;
+	blk_t	blocks = 0;
+	int	actual, bitmap;
+	struct problem_context	pctx;
+	int	problem, save_problem, fixit, had_problem;
+	errcode_t	retval;
+	int		csum_flag;
+	int		skip_group = 0;
+
+	clear_problem_context(&pctx);
+
+	if (!(fs->super->s_feature_compat &
+				NEXT3_FEATURE_COMPAT_EXCLUDE_INODE))
+		return;
+
+	csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+					       EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
+redo_counts:
+	had_problem = 0;
+	save_problem = 0;
+	pctx.blk = pctx.blk2 = NO_BLK;
+	if (csum_flag &&
+	    (fs->group_desc[group].bg_flags & EXT2_BG_BLOCK_UNINIT))
+		skip_group++;
+	for (i = fs->super->s_first_data_block;
+	     i < fs->super->s_blocks_count;
+	     i++) {
+		actual = ext2fs_fast_test_block_bitmap(ctx->block_excluded_map, i);
+
+		if (skip_group) {
+			bitmap = 0;
+			actual = (actual != 0);
+		} else
+			bitmap = ext2fs_fast_test_block_bitmap(fs->exclude_map, i);
+
+		if (actual == bitmap)
+			goto do_counts;
+
+		if (!actual && bitmap) {
+			/*
+			 * Block not excluded, but marked in exclude bitmap.
+			 */
+			problem = PR_5_BLOCK_NOTEXCLUDED;
+		} else {
+			/*
+			 * Block excluded, but not marked in exclude bitmap.
+			 */
+			problem = PR_5_BLOCK_EXCLUDED;
+
+			if (skip_group) {
+				struct problem_context pctx2;
+				pctx2.blk = i;
+				pctx2.group = group;
+				if (fix_problem(ctx, PR_5_BLOCK_UNINIT,&pctx2)){
+					fs->group_desc[group].bg_flags &=
+						~EXT2_BG_BLOCK_UNINIT;
+					skip_group = 0;
+				}
+			}
+		}
+		if (pctx.blk == NO_BLK) {
+			pctx.blk = pctx.blk2 = i;
+			save_problem = problem;
+		} else {
+			if ((problem == save_problem) &&
+			    (pctx.blk2 == i-1))
+				pctx.blk2++;
+			else {
+				print_bitmap_problem(ctx, save_problem, &pctx);
+				pctx.blk = pctx.blk2 = i;
+				save_problem = problem;
+			}
+		}
+		ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
+		had_problem++;
+
+	do_counts:
+		blocks ++;
+		if ((blocks == fs->super->s_blocks_per_group) ||
+		    (i == fs->super->s_blocks_count-1)) {
+			group ++;
+			blocks = 0;
+			skip_group = 0;
+			if (ctx->progress)
+				if ((ctx->progress)(ctx, 5, group,
+						    fs->group_desc_count*2))
+					return;
+			if (csum_flag &&
+			    (i != fs->super->s_blocks_count-1) &&
+			    (fs->group_desc[group].bg_flags &
+			     EXT2_BG_BLOCK_UNINIT))
+				skip_group++;
+		}
+	}
+	if (pctx.blk != NO_BLK)
+		print_bitmap_problem(ctx, save_problem, &pctx);
+	if (had_problem)
+		fixit = end_problem_latch(ctx, PR_LATCH_XBITMAP);
+	else
+		fixit = -1;
+	ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
+
+	if (fixit == 1) {
+		ext2fs_free_block_bitmap(fs->exclude_map);
+		retval = ext2fs_copy_bitmap(ctx->block_excluded_map,
+						  &fs->exclude_map);
+		if (retval) {
+			clear_problem_context(&pctx);
+			fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
+			ctx->flags |= E2F_FLAG_ABORT;
+			return;
+		}
+		ext2fs_mark_exclude_dirty(fs);
+		/* clear fix_exclude flag */
+		if (fs->super->s_feature_ro_compat &
+				NEXT3_FEATURE_RO_COMPAT_FIX_EXCLUDE) {
+			fs->super->s_feature_ro_compat &=
+				~NEXT3_FEATURE_RO_COMPAT_FIX_EXCLUDE;
+			ext2fs_mark_super_dirty(fs);
+		}
+	} else if (fixit == 0)
+		ext2fs_unmark_valid(fs);
+}
+
 static void check_inode_bitmaps(e2fsck_t ctx)
 {
 	ext2_filsys fs = ctx->fs;
diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index 77ae11b..1056c17 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -1550,6 +1550,26 @@ static struct e2fsck_problem problem_table[] = {
 	  "\n",
 	  PROMPT_FIX, PR_PREEN_OK | PR_PREEN_NOMSG },
 
+	/* Exclude bitmap differences header */
+	{ PR_5_EXCLUDE_BITMAP_HEADER,
+	  N_("Exclude @B differences: "),
+	  PROMPT_NONE, PR_PREEN_OK | PR_PREEN_NOMSG},
+
+	/* Block not excluded, but marked in exclude bitmap */
+	{ PR_5_BLOCK_NOTEXCLUDED,
+	  " -%b",
+	  PROMPT_NONE, PR_LATCH_XBITMAP | PR_PREEN_OK | PR_PREEN_NOMSG },
+
+	/* Block excluded, but not marked in exclude bitmap */
+	{ PR_5_BLOCK_EXCLUDED,
+	  " +%b",
+	  PROMPT_NONE, PR_LATCH_XBITMAP | PR_PREEN_OK | PR_PREEN_NOMSG },
+
+	/* Exclude bitmap differences end */
+	{ PR_5_EXCLUDE_BITMAP_END,
+	  "\n",
+	  PROMPT_FIX, PR_PREEN_OK | PR_PREEN_NOMSG },
+
 	/* Inode bitmap differences header */
 	{ PR_5_INODE_BITMAP_HEADER,
 	  N_("@i @B differences: "),
@@ -1626,6 +1646,16 @@ static struct e2fsck_problem problem_table[] = {
 	  " +(%b--%c)",
 	  PROMPT_NONE, PR_LATCH_BBITMAP | PR_PREEN_OK | PR_PREEN_NOMSG },
 
+	/* Block range not excluded, but marked in exclude bitmap */
+	{ PR_5_BLOCK_RANGE_NOTEXCLUDED,
+	  " -(%b--%c)",
+	  PROMPT_NONE, PR_LATCH_XBITMAP | PR_PREEN_OK | PR_PREEN_NOMSG },
+
+	/* Block range excluded, but not marked in exclude bitmap */
+	{ PR_5_BLOCK_RANGE_EXCLUDED,
+	  " +(%b--%c)",
+	  PROMPT_NONE, PR_LATCH_XBITMAP | PR_PREEN_OK | PR_PREEN_NOMSG },
+
 	/* Inode range not used, but marked in bitmap */
 	{ PR_5_INODE_RANGE_UNUSED,
 	  " -(%i--%j)",
@@ -1667,6 +1697,7 @@ static struct latch_descr pr_latch_info[] = {
 	{ PR_LATCH_BBLOCK, PR_1_INODE_BBLOCK_LATCH, 0 },
 	{ PR_LATCH_IBITMAP, PR_5_INODE_BITMAP_HEADER, PR_5_INODE_BITMAP_END },
 	{ PR_LATCH_BBITMAP, PR_5_BLOCK_BITMAP_HEADER, PR_5_BLOCK_BITMAP_END },
+	{ PR_LATCH_XBITMAP, PR_5_EXCLUDE_BITMAP_HEADER, PR_5_EXCLUDE_BITMAP_END },
 	{ PR_LATCH_RELOC, PR_0_RELOCATE_HINT, 0 },
 	{ PR_LATCH_DBLOCK, PR_1B_DUP_BLOCK_HEADER, PR_1B_DUP_BLOCK_END },
 	{ PR_LATCH_LOW_DTIME, PR_1_ORPHAN_LIST_REFUGEES, 0 },
diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index 19341ad..f302b12 100644
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -39,6 +39,7 @@ struct problem_context {
 #define PR_LATCH_TOOBIG	0x0080	/* Latch for file to big errors */
 #define PR_LATCH_OPTIMIZE_DIR 0x0090 /* Latch for optimize directories */
 #define PR_LATCH_BG_CHECKSUM 0x00A0  /* Latch for block group checksums */
+#define PR_LATCH_XBITMAP 0x00B0 /* Latch for pass 5 exclude bitmap proc. */
 
 #define PR_LATCH(x)	((((x) & PR_LATCH_MASK) >> 4) - 1)
 
@@ -992,6 +993,24 @@ struct problem_context {
 /* Inode in use but group is marked INODE_UNINIT */
 #define PR_5_INODE_UNINIT		0x050019
 
+/* Exclude bitmap differences header */
+#define PR_5_EXCLUDE_BITMAP_HEADER	0x050100
+
+/* Block not excluded, but marked in exclude bitmap */
+#define PR_5_BLOCK_NOTEXCLUDED		0x050101
+
+/* Block excluded, but not marked in exclude bitmap */
+#define PR_5_BLOCK_EXCLUDED		0x050102
+
+/* Block range not excluded, but marked in exclude bitmap */
+#define PR_5_BLOCK_RANGE_NOTEXCLUDED	0x050103
+
+/* Block range excluded, but not marked in exclude bitmap */
+#define PR_5_BLOCK_RANGE_EXCLUDED	0x050104
+
+/* Exclude bitmap differences end */
+#define PR_5_EXCLUDE_BITMAP_END		0x050105
+
 /*
  * Post-Pass 5 errors
  */
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 4568fcb..d3c29c5 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -175,6 +175,7 @@ typedef struct ext2_file *ext2_file_t;
 #define EXT2_FLAG_NOFREE_ON_ERROR	0x10000
 #define EXT2_FLAG_64BITS		0x20000
 #define EXT2_FLAG_PRINT_PROGRESS	0x40000
+#define EXT2_FLAG_EXCLUDE_DIRTY		0x100000
 
 /*
  * Special flag in the ext2 inode i_flag field that means that this is
@@ -203,6 +204,7 @@ struct struct_ext2_filsys {
 	int				inode_blocks_per_group;
 	ext2fs_inode_bitmap		inode_map;
 	ext2fs_block_bitmap		block_map;
+	ext2fs_block_bitmap		exclude_map;
 	errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
 	errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino);
 	errcode_t (*write_bitmaps)(ext2_filsys fs);
@@ -662,8 +664,10 @@ extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
 				    ext2fs_generic_bitmap *dest);
 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
+extern errcode_t ext2fs_write_exclude_bitmap (ext2_filsys fs);
 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
+extern errcode_t ext2fs_read_exclude_bitmap (ext2_filsys fs);
 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
 					      const char *descr,
 					      ext2fs_block_bitmap *ret);
@@ -1465,6 +1469,14 @@ _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
 }
 
 /*
+ * Mark the exclude bitmap as dirty
+ */
+_INLINE_ void ext2fs_mark_exclude_dirty(ext2_filsys fs)
+{
+	fs->flags |= EXT2_FLAG_EXCLUDE_DIRTY | EXT2_FLAG_CHANGED;
+}
+
+/*
  * Check to see if a filesystem's inode bitmap is dirty
  */
 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
@@ -1481,6 +1493,14 @@ _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
 }
 
 /*
+ * Check to see if a filesystem's exclude bitmap is dirty
+ */
+_INLINE_ int ext2fs_test_exclude_dirty(ext2_filsys fs)
+{
+	return (fs->flags & EXT2_FLAG_EXCLUDE_DIRTY);
+}
+
+/*
  * Return the group # of a block
  */
 _INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
diff --git a/lib/ext2fs/rw_bitmaps.c b/lib/ext2fs/rw_bitmaps.c
index 962678c..4c2e4e0 100644
--- a/lib/ext2fs/rw_bitmaps.c
+++ b/lib/ext2fs/rw_bitmaps.c
@@ -27,14 +27,15 @@
 #include "ext2fs.h"
 #include "e2image.h"
 
-static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
+static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block,
+		int do_exclude)
 {
 	dgrp_t 		i;
 	unsigned int	j;
 	int		block_nbytes, inode_nbytes;
 	unsigned int	nbits;
 	errcode_t	retval;
-	char 		*block_buf, *inode_buf;
+	char 		*block_buf, *inode_buf, *exclude_buf;
 	int		csum_flag = 0;
 	blk64_t		blk;
 	blk64_t		blk_itr = fs->super->s_first_data_block;
@@ -45,6 +46,10 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 	if (!(fs->flags & EXT2_FLAG_RW))
 		return EXT2_ET_RO_FILSYS;
 
+	if (!EXT2_HAS_COMPAT_FEATURE(fs->super,
+				       NEXT3_FEATURE_COMPAT_EXCLUDE_INODE))
+		do_exclude = 0;
+
 	if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 				       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
 		csum_flag = 1;
@@ -57,6 +62,13 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 			return retval;
 		memset(block_buf, 0xff, fs->blocksize);
 	}
+	if (do_exclude) {
+		block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
+		retval = ext2fs_get_mem(fs->blocksize, &exclude_buf);
+		if (retval)
+			return retval;
+		memset(exclude_buf, 0xff, fs->blocksize);
+	}
 	if (do_inode) {
 		inode_nbytes = (size_t)
 			((EXT2_INODES_PER_GROUP(fs->super)+7) / 8);
@@ -67,7 +79,7 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 	}
 
 	for (i = 0; i < fs->group_desc_count; i++) {
-		if (!do_block)
+		if (!do_block && !do_exclude)
 			goto skip_block_bitmap;
 
 		if (csum_flag && ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)
@@ -76,10 +88,19 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 
 		retval = ext2fs_get_block_bitmap_range2(fs->block_map,
 				blk_itr, block_nbytes << 3, block_buf);
+		if (do_block)
+			retval = ext2fs_get_block_bitmap_range2(fs->block_map,
+					blk_itr, block_nbytes << 3, block_buf);
+		if (retval)
+			return retval;
+
+		if (do_exclude)
+			retval = ext2fs_get_block_bitmap_range2(fs->exclude_map,
+					blk_itr, block_nbytes << 3, exclude_buf);
 		if (retval)
 			return retval;
 
-		if (i == fs->group_desc_count - 1) {
+		if (do_block && i == fs->group_desc_count - 1) {
 			/* Force bitmap padding for the last group */
 			nbits = ((ext2fs_blocks_count(fs->super)
 				  - (__u64) fs->super->s_first_data_block)
@@ -89,12 +110,19 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 					ext2fs_set_bit(j, block_buf);
 		}
 		blk = ext2fs_block_bitmap_loc(fs, i);
-		if (blk) {
+		if (do_block && blk) {
 			retval = io_channel_write_blk64(fs->io, blk, 1,
 							block_buf);
 			if (retval)
 				return EXT2_ET_BLOCK_BITMAP_WRITE;
 		}
+		blk = fs->group_desc[i].bg_exclude_bitmap;
+		if (do_exclude && blk) {
+			retval = io_channel_write_blk64(fs->io, blk, 1,
+						      exclude_buf);
+			if (retval)
+				return EXT2_ET_BLOCK_BITMAP_WRITE;
+		}
 	skip_this_block_bitmap:
 		blk_itr += block_nbytes << 3;
 	skip_block_bitmap:
@@ -133,10 +161,11 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 	return 0;
 }
 
-static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
+static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block,
+		int do_exclude)
 {
 	dgrp_t i;
-	char *block_bitmap = 0, *inode_bitmap = 0;
+	char *block_bitmap = 0, *inode_bitmap = 0, *exclude_bitmap = 0;
 	char *buf;
 	errcode_t retval;
 	int block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
@@ -154,6 +183,10 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 
 	fs->write_bitmaps = ext2fs_write_bitmaps;
 
+	if (!EXT2_HAS_COMPAT_FEATURE(fs->super,
+				       NEXT3_FEATURE_COMPAT_EXCLUDE_INODE))
+		do_exclude = 0;
+
 	if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 				       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
 		csum_flag = 1;
@@ -173,7 +206,21 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 					(unsigned) block_nbytes, &block_bitmap);
 		if (retval)
 			goto cleanup;
-	} else
+	}
+	if (do_exclude) {
+		if (fs->exclude_map)
+			ext2fs_free_block_bitmap(fs->exclude_map);
+		strcpy(buf, "exclude bitmap for ");
+		strcat(buf, fs->device_name);
+		retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->exclude_map);
+		if (retval)
+			goto cleanup;
+		retval = ext2fs_get_mem(do_image ? fs->blocksize :
+					(unsigned) block_nbytes, &exclude_bitmap);
+		if (retval)
+			goto cleanup;
+	}
+	if (!do_block && !do_exclude)
 		block_nbytes = 0;
 	if (do_inode) {
 		if (fs->inode_map)
@@ -215,7 +262,12 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 		blk_cnt = (blk64_t)EXT2_BLOCKS_PER_GROUP(fs->super) *
 			fs->group_desc_count;
 		while (block_nbytes > 0) {
-			retval = io_channel_read_blk64(fs->image_io, blk++,
+			if (do_exclude) {
+				retval = EXT2_ET_BLOCK_BITMAP_READ;
+				goto cleanup;
+			}
+
+ 			retval = io_channel_read_blk64(fs->image_io, blk++,
 						     1, block_bitmap);
 			if (retval)
 				goto cleanup;
@@ -254,8 +306,30 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 					       blk_itr, cnt, block_bitmap);
 			if (retval)
 				goto cleanup;
-			blk_itr += block_nbytes << 3;
 		}
+		if (exclude_bitmap) {
+			blk = fs->group_desc[i].bg_exclude_bitmap;
+			if (csum_flag && fs->group_desc[i].bg_flags &
+			    EXT2_BG_BLOCK_UNINIT &&
+			    ext2fs_group_desc_csum_verify(fs, i))
+				blk = 0;
+			if (blk) {
+				retval = io_channel_read_blk64(fs->io, blk,
+					     -block_nbytes, exclude_bitmap);
+				if (retval) {
+					retval = EXT2_ET_BLOCK_BITMAP_READ;
+					goto cleanup;
+				}
+			} else
+				memset(exclude_bitmap, 0, block_nbytes);
+			cnt = block_nbytes << 3;
+			retval = ext2fs_set_block_bitmap_range2(fs->exclude_map,
+					       blk_itr, cnt, exclude_bitmap);
+			if (retval)
+				goto cleanup;
+		}
+		if (block_nbytes)
+			blk_itr += block_nbytes << 3;
 		if (inode_bitmap) {
 			blk = ext2fs_inode_bitmap_loc(fs, i);
 			if (csum_flag &&
@@ -284,6 +358,8 @@ success_cleanup:
 		ext2fs_free_mem(&inode_bitmap);
 	if (block_bitmap)
 		ext2fs_free_mem(&block_bitmap);
+	if (exclude_bitmap)
+		ext2fs_free_mem(&exclude_bitmap);
 	return 0;
 
 cleanup:
@@ -299,6 +375,8 @@ cleanup:
 		ext2fs_free_mem(&inode_bitmap);
 	if (block_bitmap)
 		ext2fs_free_mem(&block_bitmap);
+	if (exclude_bitmap)
+		ext2fs_free_mem(&exclude_bitmap);
 	if (buf)
 		ext2fs_free_mem(&buf);
 	return retval;
@@ -306,39 +384,50 @@ cleanup:
 
 errcode_t ext2fs_read_inode_bitmap(ext2_filsys fs)
 {
-	return read_bitmaps(fs, 1, 0);
+	return read_bitmaps(fs, 1, 0, 0);
 }
 
 errcode_t ext2fs_read_block_bitmap(ext2_filsys fs)
 {
-	return read_bitmaps(fs, 0, 1);
+	return read_bitmaps(fs, 0, 1, 0);
+}
+
+errcode_t ext2fs_read_exclude_bitmap (ext2_filsys fs)
+{
+	return read_bitmaps(fs, 0, 0, 1);
 }
 
 errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs)
 {
-	return write_bitmaps(fs, 1, 0);
+	return write_bitmaps(fs, 1, 0, 0);
 }
 
 errcode_t ext2fs_write_block_bitmap (ext2_filsys fs)
 {
-	return write_bitmaps(fs, 0, 1);
+	return write_bitmaps(fs, 0, 1, 0);
+}
+
+errcode_t ext2fs_write_exclude_bitmap (ext2_filsys fs)
+{
+	return write_bitmaps(fs, 0, 0, 1);
 }
 
 errcode_t ext2fs_read_bitmaps(ext2_filsys fs)
 {
-	if (fs->inode_map && fs->block_map)
+	if (fs->inode_map && fs->block_map && fs->exclude_map)
 		return 0;
 
-	return read_bitmaps(fs, !fs->inode_map, !fs->block_map);
+	return read_bitmaps(fs, !fs->inode_map, !fs->block_map, !fs->exclude_map);
 }
 
 errcode_t ext2fs_write_bitmaps(ext2_filsys fs)
 {
 	int do_inode = fs->inode_map && ext2fs_test_ib_dirty(fs);
 	int do_block = fs->block_map && ext2fs_test_bb_dirty(fs);
+	int do_exclude = fs->exclude_map && ext2fs_test_exclude_dirty(fs);
 
-	if (!do_inode && !do_block)
+	if (!do_inode && !do_block && !do_exclude)
 		return 0;
 
-	return write_bitmaps(fs, do_inode, do_block);
+	return write_bitmaps(fs, do_inode, do_block, do_exclude);
 }
