Fix ext2/ext4 filesystem accesses beyond 2TiB

With CONFIG_SYS_64BIT_LBA, lbaint_t gets defined as a 64-bit type,
which is required to represent block numbers for storage devices that
exceed 2TiB (the block size usually is 512B), e.g. recent hard drives

We now use lbaint_t for partition offset to reflect the lbaint_t change,
and access partitions beyond or crossing the 2.1TiB limit.
This required changes to signature of ext4fs_devread(), and type of all
variables relatives to block sector.

ext2/ext4 fs uses logical block represented by a 32 bit value. Logical
block is a multiple of device block sector. To avoid overflow problem
when calling ext4fs_devread(), we need to cast the sector parameter.

Signed-off-by: Frédéric Leroy <fredo@starox.org>

5 files changed, 80 insertions, 60 deletions

diff --git a/fs/ext4/dev.c b/fs/ext4/dev.c
index 81b7633..2cd182c 100644
--- a/fs/ext4/dev.c
+++ b/fs/ext4/dev.c
@@ -42,7 +42,7 @@
 #include <ext_common.h>
 #include "ext4_common.h"
 
-unsigned long part_offset;
+lbaint_t part_offset;
 
 static block_dev_desc_t *ext4fs_block_dev_desc;
 static disk_partition_t *part_info;
@@ -58,7 +58,7 @@ void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
 		get_fs()->dev_desc->log2blksz;
 }
 
-int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf)
+int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf)
 {
 	unsigned block_len;
 	int log2blksz = ext4fs_block_dev_desc->log2blksz;
@@ -74,7 +74,8 @@ int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf)
 	if ((sector < 0) ||
 	    ((sector + ((byte_offset + byte_len - 1) >> log2blksz))
 	     >= part_info->size)) {
-		printf("%s read outside partition %d\n", __func__, sector);
+		printf("%s read outside partition " LBAFU "\n", __func__,
+		       sector);
 		return 0;
 	}
 
@@ -82,7 +83,7 @@ int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf)
 	sector += byte_offset >> log2blksz;
 	byte_offset &= ext4fs_block_dev_desc->blksz - 1;
 
-	debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len);
+	debug(" <" LBAFU ", %d, %d>\n", sector, byte_offset, byte_len);
 
 	if (byte_offset != 0) {
 		/* read first part which isn't aligned with start of sector */
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index 58880b4..2776293 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -84,7 +84,7 @@ void put_ext4(uint64_t off, void *buf, uint32_t size)
 
 	if ((startblock + (size >> log2blksz)) >
 	    (part_offset + fs->total_sect)) {
-		printf("part_offset is %lu\n", part_offset);
+		printf("part_offset is " LBAFU "\n", part_offset);
 		printf("total_sector is %llu\n", fs->total_sect);
 		printf("error: overflow occurs\n");
 		return;
@@ -405,7 +405,7 @@ restart:
 		previous_blknr = root_blknr;
 	}
 
-	status = ext4fs_devread(first_block_no_of_root
+	status = ext4fs_devread((lbaint_t)first_block_no_of_root
 				* fs->sect_perblk,
 				0, fs->blksz, root_first_block_buffer);
 	if (status == 0)
@@ -545,7 +545,7 @@ static int search_dir(struct ext2_inode *parent_inode, char *dirname)
 		if (!block_buffer)
 			goto fail;
 
-		status = ext4fs_devread(blknr * fs->sect_perblk,
+		status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk,
 					0, fs->blksz, (char *)block_buffer);
 		if (status == 0)
 			goto fail;
@@ -783,7 +783,7 @@ static int check_filename(char *filename, unsigned int blknr)
 	if (!root_first_block_buffer)
 		return -ENOMEM;
 	root_first_block_addr = root_first_block_buffer;
-	status = ext4fs_devread(first_block_no_of_root *
+	status = ext4fs_devread((lbaint_t)first_block_no_of_root *
 				fs->sect_perblk, 0,
 				fs->blksz, root_first_block_buffer);
 	if (status == 0)
@@ -895,7 +895,8 @@ long int ext4fs_get_new_blk_no(void)
 				fs->first_pass_bbmap++;
 				bgd[i].free_blocks--;
 				fs->sb->free_blocks--;
-				status = ext4fs_devread(bgd[i].block_id *
+				status = ext4fs_devread((lbaint_t)
+							bgd[i].block_id *
 							fs->sect_perblk, 0,
 							fs->blksz,
 							journal_buffer);
@@ -957,7 +958,7 @@ restart:
 		/* journal backup */
 		if (prev_bg_bitmap_index != bg_idx) {
 			memset(journal_buffer, '\0', fs->blksz);
-			status = ext4fs_devread(bgd[bg_idx].block_id
+			status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id
 						* fs->sect_perblk,
 						0, fs->blksz, journal_buffer);
 			if (status == 0)
@@ -1026,7 +1027,8 @@ int ext4fs_get_new_inode_no(void)
 				bgd[i].free_inodes--;
 				bgd[i].bg_itable_unused--;
 				fs->sb->free_inodes--;
-				status = ext4fs_devread(bgd[i].inode_id *
+				status = ext4fs_devread((lbaint_t)
+							bgd[i].inode_id *
 							fs->sect_perblk, 0,
 							fs->blksz,
 							journal_buffer);
@@ -1067,7 +1069,8 @@ restart:
 		/* journal backup */
 		if (prev_inode_bitmap_index != ibmap_idx) {
 			memset(journal_buffer, '\0', fs->blksz);
-			status = ext4fs_devread(bgd[ibmap_idx].inode_id
+			status = ext4fs_devread((lbaint_t)
+						bgd[ibmap_idx].inode_id
 						* fs->sect_perblk,
 						0, fs->blksz, journal_buffer);
 			if (status == 0)
@@ -1129,7 +1132,7 @@ static void alloc_single_indirect_block(struct ext2_inode *file_inode,
 		(*no_blks_reqd)++;
 		debug("SIPB %ld: %u\n", si_blockno, *total_remaining_blocks);
 
-		status = ext4fs_devread(si_blockno * fs->sect_perblk,
+		status = ext4fs_devread((lbaint_t)si_blockno * fs->sect_perblk,
 					0, fs->blksz, (char *)si_buffer);
 		memset(si_buffer, '\0', fs->blksz);
 		if (status == 0)
@@ -1193,7 +1196,7 @@ static void alloc_double_indirect_block(struct ext2_inode *file_inode,
 		debug("DIPB %ld: %u\n", di_blockno_parent,
 		      *total_remaining_blocks);
 
-		status = ext4fs_devread(di_blockno_parent *
+		status = ext4fs_devread((lbaint_t)di_blockno_parent *
 					fs->sect_perblk, 0,
 					fs->blksz, (char *)di_parent_buffer);
 
@@ -1224,7 +1227,7 @@ static void alloc_double_indirect_block(struct ext2_inode *file_inode,
 			debug("DICB %ld: %u\n", di_blockno_child,
 			      *total_remaining_blocks);
 
-			status = ext4fs_devread(di_blockno_child *
+			status = ext4fs_devread((lbaint_t)di_blockno_child *
 						fs->sect_perblk, 0,
 						fs->blksz,
 						(char *)di_child_buff);
@@ -1447,7 +1450,8 @@ static struct ext4_extent_header *ext4fs_get_extent_block
 		block = le32_to_cpu(index[i].ei_leaf_hi);
 		block = (block << 32) + le32_to_cpu(index[i].ei_leaf_lo);
 
-		if (ext4fs_devread(block << log2_blksz, 0, fs->blksz, buf))
+		if (ext4fs_devread((lbaint_t)block << log2_blksz, 0, fs->blksz,
+				   buf))
 			ext_block = (struct ext4_extent_header *)buf;
 		else
 			return 0;
@@ -1470,7 +1474,8 @@ static int ext4fs_blockgroup
 	debug("ext4fs read %d group descriptor (blkno %ld blkoff %u)\n",
 	      group, blkno, blkoff);
 
-	return ext4fs_devread(blkno << (LOG2_BLOCK_SIZE(data) - log2blksz),
+	return ext4fs_devread((lbaint_t)blkno <<
+			      (LOG2_BLOCK_SIZE(data) - log2blksz),
 			      blkoff, sizeof(struct ext2_block_group),
 			      (char *)blkgrp);
 }
@@ -1497,8 +1502,8 @@ int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)
 	    (ino % __le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
 	blkoff = (ino % inodes_per_block) * fs->inodesz;
 	/* Read the inode. */
-	status = ext4fs_devread(blkno << (LOG2_BLOCK_SIZE(data) - log2blksz),
-				blkoff,
+	status = ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) -
+				log2blksz), blkoff,
 				sizeof(struct ext2_inode), (char *)inode);
 	if (status == 0)
 		return 0;
@@ -1597,7 +1602,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 		if ((__le32_to_cpu(inode->b.blocks.indir_block) <<
 		     log2_blksz) != ext4fs_indir1_blkno) {
 			status =
-			    ext4fs_devread(__le32_to_cpu
+			    ext4fs_devread((lbaint_t)__le32_to_cpu
 					   (inode->b.blocks.
 					    indir_block) << log2_blksz, 0,
 					   blksz, (char *)ext4fs_indir1_block);
@@ -1646,7 +1651,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 		if ((__le32_to_cpu(inode->b.blocks.double_indir_block) <<
 		     log2_blksz) != ext4fs_indir1_blkno) {
 			status =
-			    ext4fs_devread(__le32_to_cpu
+			    ext4fs_devread((lbaint_t)__le32_to_cpu
 					   (inode->b.blocks.
 					    double_indir_block) << log2_blksz,
 					   0, blksz,
@@ -1686,7 +1691,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 		}
 		if ((__le32_to_cpu(ext4fs_indir1_block[rblock / perblock]) <<
 		     log2_blksz) != ext4fs_indir2_blkno) {
-			status = ext4fs_devread(__le32_to_cpu
+			status = ext4fs_devread((lbaint_t)__le32_to_cpu
 						(ext4fs_indir1_block
 						 [rblock /
 						  perblock]) << log2_blksz, 0,
@@ -1738,7 +1743,8 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 		if ((__le32_to_cpu(inode->b.blocks.triple_indir_block) <<
 		     log2_blksz) != ext4fs_indir1_blkno) {
 			status = ext4fs_devread
-			    (__le32_to_cpu(inode->b.blocks.triple_indir_block)
+			    ((lbaint_t)
+			     __le32_to_cpu(inode->b.blocks.triple_indir_block)
 			     << log2_blksz, 0, blksz,
 			     (char *)ext4fs_indir1_block);
 			if (status == 0) {
@@ -1778,7 +1784,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 						       perblock_parent]) <<
 		     log2_blksz)
 		    != ext4fs_indir2_blkno) {
-			status = ext4fs_devread(__le32_to_cpu
+			status = ext4fs_devread((lbaint_t)__le32_to_cpu
 						(ext4fs_indir1_block
 						 [rblock /
 						  perblock_parent]) <<
@@ -1823,7 +1829,7 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 						       perblock_child]) <<
 		     log2_blksz) != ext4fs_indir3_blkno) {
 			status =
-			    ext4fs_devread(__le32_to_cpu
+			    ext4fs_devread((lbaint_t)__le32_to_cpu
 					   (ext4fs_indir2_block
 					    [(rblock / perblock_child)
 					     % (blksz / 4)]) << log2_blksz, 0,
diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
index 81aa5fc..a540367 100644
--- a/fs/ext4/ext4_journal.c
+++ b/fs/ext4/ext4_journal.c
@@ -360,7 +360,8 @@ void recover_transaction(int prev_desc_logical_no)
 			  (struct ext2_inode *)&inode_journal);
 	blknr = read_allocated_block((struct ext2_inode *)
 				     &inode_journal, i);
-	ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+	ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+		       temp_buff);
 	p_jdb = (char *)temp_buff;
 	jdb = (struct journal_header_t *) temp_buff;
 	ofs = sizeof(struct journal_header_t);
@@ -384,7 +385,7 @@ void recover_transaction(int prev_desc_logical_no)
 				continue;
 		}
 		blknr = read_allocated_block(&inode_journal, i);
-		ext4fs_devread(blknr * fs->sect_perblk, 0,
+		ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
 			       fs->blksz, metadata_buff);
 		put_ext4((uint64_t)(be32_to_cpu(tag->block) * fs->blksz),
 			 metadata_buff, (uint32_t) fs->blksz);
@@ -431,7 +432,8 @@ int ext4fs_check_journal_state(int recovery_flag)
 
 	ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
 	blknr = read_allocated_block(&inode_journal, EXT2_JOURNAL_SUPERBLOCK);
-	ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+	ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+		       temp_buff);
 	jsb = (struct journal_superblock_t *) temp_buff;
 
 	if (fs->sb->feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
@@ -455,7 +457,7 @@ int ext4fs_check_journal_state(int recovery_flag)
 	while (1) {
 		blknr = read_allocated_block(&inode_journal, i);
 		memset(temp_buff1, '\0', fs->blksz);
-		ext4fs_devread(blknr * fs->sect_perblk,
+		ext4fs_devread((lbaint_t)blknr * fs->sect_perblk,
 			       0, fs->blksz, temp_buff1);
 		jdb = (struct journal_header_t *) temp_buff1;
 
@@ -574,7 +576,8 @@ static void update_descriptor_block(long int blknr)
 	ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
 	jsb_blknr = read_allocated_block(&inode_journal,
 					 EXT2_JOURNAL_SUPERBLOCK);
-	ext4fs_devread(jsb_blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+	ext4fs_devread((lbaint_t)jsb_blknr * fs->sect_perblk, 0, fs->blksz,
+		       temp_buff);
 	jsb = (struct journal_superblock_t *) temp_buff;
 
 	jdb.h_blocktype = cpu_to_be32(EXT3_JOURNAL_DESCRIPTOR_BLOCK);
@@ -621,10 +624,12 @@ static void update_commit_block(long int blknr)
 	if (!temp_buff)
 		return;
 
-	ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
+	ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO,
+			  &inode_journal);
 	jsb_blknr = read_allocated_block(&inode_journal,
 					 EXT2_JOURNAL_SUPERBLOCK);
-	ext4fs_devread(jsb_blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+	ext4fs_devread((lbaint_t)jsb_blknr * fs->sect_perblk, 0, fs->blksz,
+		       temp_buff);
 	jsb = (struct journal_superblock_t *) temp_buff;
 
 	jdb.h_blocktype = cpu_to_be32(EXT3_JOURNAL_COMMIT_BLOCK);
diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c
index 0c1f62b..501b95a 100644
--- a/fs/ext4/ext4_write.c
+++ b/fs/ext4/ext4_write.c
@@ -88,8 +88,8 @@ int ext4fs_get_bgdtable(void)
 	if (!fs->gdtable)
 		return -ENOMEM;
 	/* read the group descriptor table */
-	status = ext4fs_devread(fs->gdtable_blkno * fs->sect_perblk, 0,
-				fs->blksz * fs->no_blk_pergdt, fs->gdtable);
+	status = ext4fs_devread((lbaint_t)fs->gdtable_blkno * fs->sect_perblk,
+				0, fs->blksz * fs->no_blk_pergdt, fs->gdtable);
 	if (status == 0)
 		goto fail;
 
@@ -142,7 +142,7 @@ static void delete_single_indirect_block(struct ext2_inode *inode)
 		/* journal backup */
 		if (prev_bg_bmap_idx != bg_idx) {
 			status =
-			    ext4fs_devread(bgd[bg_idx].block_id *
+			    ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
 					   fs->sect_perblk, 0, fs->blksz,
 					   journal_buffer);
 			if (status == 0)
@@ -186,8 +186,8 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
 		}
 		DIB_start_addr = (unsigned int *)di_buffer;
 		blknr = inode->b.blocks.double_indir_block;
-		status = ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz,
-					(char *)di_buffer);
+		status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
+					fs->blksz, (char *)di_buffer);
 		for (i = 0; i < fs->blksz / sizeof(int); i++) {
 			if (*di_buffer == 0)
 				break;
@@ -208,7 +208,8 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
 			fs->sb->free_blocks++;
 			/* journal backup */
 			if (prev_bg_bmap_idx != bg_idx) {
-				status = ext4fs_devread(bgd[bg_idx].block_id
+				status = ext4fs_devread((lbaint_t)
+							bgd[bg_idx].block_id
 							* fs->sect_perblk, 0,
 							fs->blksz,
 							journal_buffer);
@@ -238,7 +239,7 @@ static void delete_double_indirect_block(struct ext2_inode *inode)
 		/* journal backup */
 		if (prev_bg_bmap_idx != bg_idx) {
 			memset(journal_buffer, '\0', fs->blksz);
-			status = ext4fs_devread(bgd[bg_idx].block_id *
+			status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
 						fs->sect_perblk, 0, fs->blksz,
 						journal_buffer);
 			if (status == 0)
@@ -287,8 +288,8 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
 		}
 		tib_start_addr = (unsigned int *)tigp_buffer;
 		blknr = inode->b.blocks.triple_indir_block;
-		status = ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz,
-					(char *)tigp_buffer);
+		status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
+					fs->blksz, (char *)tigp_buffer);
 		for (i = 0; i < fs->blksz / sizeof(int); i++) {
 			if (*tigp_buffer == 0)
 				break;
@@ -298,7 +299,7 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
 			if (!tip_buffer)
 				goto fail;
 			tipb_start_addr = (unsigned int *)tip_buffer;
-			status = ext4fs_devread((*tigp_buffer) *
+			status = ext4fs_devread((lbaint_t)(*tigp_buffer) *
 						fs->sect_perblk, 0, fs->blksz,
 						(char *)tip_buffer);
 			for (j = 0; j < fs->blksz / sizeof(int); j++) {
@@ -325,6 +326,7 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
 				if (prev_bg_bmap_idx != bg_idx) {
 					status =
 					    ext4fs_devread(
+							(lbaint_t)
 							bgd[bg_idx].block_id *
 							fs->sect_perblk, 0,
 							fs->blksz,
@@ -365,7 +367,8 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
 			if (prev_bg_bmap_idx != bg_idx) {
 				memset(journal_buffer, '\0', fs->blksz);
 				status =
-				    ext4fs_devread(bgd[bg_idx].block_id *
+				    ext4fs_devread((lbaint_t)
+						   bgd[bg_idx].block_id *
 						   fs->sect_perblk, 0,
 						   fs->blksz, journal_buffer);
 				if (status == 0)
@@ -394,7 +397,7 @@ static void delete_triple_indirect_block(struct ext2_inode *inode)
 		/* journal backup */
 		if (prev_bg_bmap_idx != bg_idx) {
 			memset(journal_buffer, '\0', fs->blksz);
-			status = ext4fs_devread(bgd[bg_idx].block_id *
+			status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
 						fs->sect_perblk, 0, fs->blksz,
 						journal_buffer);
 			if (status == 0)
@@ -480,7 +483,8 @@ static int ext4fs_delete_file(int inodeno)
 			/* journal backup */
 			if (prev_bg_bmap_idx != bg_idx) {
 				status =
-				    ext4fs_devread(bgd[bg_idx].block_id *
+				    ext4fs_devread((lbaint_t)
+						   bgd[bg_idx].block_id *
 						   fs->sect_perblk, 0,
 						   fs->blksz, journal_buffer);
 				if (status == 0)
@@ -524,7 +528,8 @@ static int ext4fs_delete_file(int inodeno)
 			/* journal backup */
 			if (prev_bg_bmap_idx != bg_idx) {
 				memset(journal_buffer, '\0', fs->blksz);
-				status = ext4fs_devread(bgd[bg_idx].block_id
+				status = ext4fs_devread((lbaint_t)
+							bgd[bg_idx].block_id
 							* fs->sect_perblk,
 							0, fs->blksz,
 							journal_buffer);
@@ -555,7 +560,7 @@ static int ext4fs_delete_file(int inodeno)
 	if (!read_buffer)
 		goto fail;
 	start_block_address = read_buffer;
-	status = ext4fs_devread(blkno * fs->sect_perblk,
+	status = ext4fs_devread((lbaint_t)blkno * fs->sect_perblk,
 				0, fs->blksz, read_buffer);
 	if (status == 0)
 		goto fail;
@@ -578,7 +583,7 @@ static int ext4fs_delete_file(int inodeno)
 	fs->sb->free_inodes++;
 	/* journal backup */
 	memset(journal_buffer, '\0', fs->blksz);
-	status = ext4fs_devread(bgd[ibmap_idx].inode_id *
+	status = ext4fs_devread((lbaint_t)bgd[ibmap_idx].inode_id *
 				fs->sect_perblk, 0, fs->blksz, journal_buffer);
 	if (status == 0)
 		goto fail;
@@ -653,7 +658,8 @@ int ext4fs_init(void)
 
 	for (i = 0; i < fs->no_blkgrp; i++) {
 		status =
-		    ext4fs_devread(fs->bgd[i].block_id * fs->sect_perblk, 0,
+		    ext4fs_devread((lbaint_t)fs->bgd[i].block_id *
+				   fs->sect_perblk, 0,
 				   fs->blksz, (char *)fs->blk_bmaps[i]);
 		if (status == 0)
 			goto fail;
@@ -670,7 +676,8 @@ int ext4fs_init(void)
 	}
 
 	for (i = 0; i < fs->no_blkgrp; i++) {
-		status = ext4fs_devread(fs->bgd[i].inode_id * fs->sect_perblk,
+		status = ext4fs_devread((lbaint_t)fs->bgd[i].inode_id *
+					fs->sect_perblk,
 					0, fs->blksz,
 					(char *)fs->inode_bmaps[i]);
 		if (status == 0)
@@ -710,7 +717,7 @@ void ext4fs_deinit(void)
 				  &inode_journal);
 		blknr = read_allocated_block(&inode_journal,
 					EXT2_JOURNAL_SUPERBLOCK);
-		ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz,
+		ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
 			       temp_buff);
 		jsb = (struct journal_superblock_t *)temp_buff;
 		jsb->s_start = cpu_to_be32(0);
@@ -934,7 +941,8 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
 			(inodeno % __le32_to_cpu(sblock->inodes_per_group)) /
 			inodes_per_block;
 	blkoff = (inodeno % inodes_per_block) * fs->inodesz;
-	ext4fs_devread(itable_blkno * fs->sect_perblk, 0, fs->blksz, temp_ptr);
+	ext4fs_devread((lbaint_t)itable_blkno * fs->sect_perblk, 0, fs->blksz,
+		       temp_ptr);
 	if (ext4fs_log_journal(temp_ptr, itable_blkno))
 		goto fail;
 
@@ -954,7 +962,7 @@ int ext4fs_write(const char *fname, unsigned char *buffer,
 	blkoff = (parent_inodeno % inodes_per_block) * fs->inodesz;
 	if (parent_itable_blkno != itable_blkno) {
 		memset(temp_ptr, '\0', fs->blksz);
-		ext4fs_devread(parent_itable_blkno * fs->sect_perblk,
+		ext4fs_devread((lbaint_t)parent_itable_blkno * fs->sect_perblk,
 			       0, fs->blksz, temp_ptr);
 		if (ext4fs_log_journal(temp_ptr, parent_itable_blkno))
 			goto fail;
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index 1954afb..20ff10f 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -62,16 +62,16 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
 {
 	struct ext_filesystem *fs = get_fs();
 	int i;
-	int blockcnt;
+	lbaint_t blockcnt;
 	int log2blksz = fs->dev_desc->log2blksz;
 	int log2_fs_blocksize = LOG2_BLOCK_SIZE(node->data) - log2blksz;
 	int blocksize = (1 << (log2_fs_blocksize + log2blksz));
 	unsigned int filesize = __le32_to_cpu(node->inode.size);
-	int previous_block_number = -1;
-	int delayed_start = 0;
-	int delayed_extent = 0;
-	int delayed_skipfirst = 0;
-	int delayed_next = 0;
+	lbaint_t previous_block_number = -1;
+	lbaint_t delayed_start = 0;
+	lbaint_t delayed_extent = 0;
+	lbaint_t delayed_skipfirst = 0;
+	lbaint_t delayed_next = 0;
 	char *delayed_buf = NULL;
 	short status;
 
@@ -82,7 +82,7 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
 	blockcnt = ((len + pos) + blocksize - 1) / blocksize;
 
 	for (i = pos / blocksize; i < blockcnt; i++) {
-		int blknr;
+		lbaint_t blknr;
 		int blockoff = pos % blocksize;
 		int blockend = blocksize;
 		int skipfirst = 0;