Define and use e2fs_lbn_t in ext2fs.

In line to what is done in UFS, define an internal type
e2fs_lbn_t for the logical block numbers.

This change is basically a no-op as the new type is unchanged
(int32_t) but it may be useful as bumping this may be required
for ext4fs.

Also, as pointed out by Bruce Evans:

-Use daddr_t for daddr in ext2_bmaparray(). This seems to
improve reliability with the reallocblks option.
- Add a cast to the fsbtodb() macro as in UFS.

Reviewed by:	bde
MFC after:	3 days

1 files changed, 6 insertions, 1 deletions

diff --git a/sys/fs/ext2fs/inode.h b/sys/fs/ext2fs/inode.h
index 82525e9..d939987 100644
--- a/sys/fs/ext2fs/inode.h
+++ b/sys/fs/ext2fs/inode.h
@@ -50,6 +50,11 @@
 #define	NIADDR	3			/* Indirect addresses in inode. */
 
 /*
+ * The size of physical and logical block numbers and time fields in UFS.
+ */
+typedef int32_t	e2fs_lbn_t;
+ 
+/*
  * The inode is used to describe each active (or recently active) file in the
  * EXT2FS filesystem. It is composed of two types of information. The first
  * part is the information that is needed only while the file is active (such
@@ -148,7 +153,7 @@ struct inode {
  * ext2_getlbns and used by truncate and bmap code.
  */
 struct indir {
-	int32_t in_lbn;			/* Logical block number. */
+	e2fs_lbn_t in_lbn;		/* Logical block number. */
 	int	in_off;			/* Offset in buffer. */
 };