[PATCH 07/35] xfs: convert rt bitmap extent lengths to xfs_rtbxlen_t

[cem@kernel.org]

From: "Darrick J. Wong" <djwong@kernel.org>

Source kernel commit: f29c3e745dc253bf9d9d06ddc36af1a534ba1dd0

XFS uses xfs_rtblock_t for many different uses, which makes it much more
difficult to perform a unit analysis on the codebase.  One of these
(ab)uses is when we need to store the length of a free space extent as
stored in the realtime bitmap.  Because there can be up to 2^64 realtime
extents in a filesystem, we need a new type that is larger than
xfs_rtxlen_t for callers that are querying the bitmap directly.  This
means scrub and growfs.

Create this type as "xfs_rtbxlen_t" and use it to store 64-bit rtx
lengths.  'b' stands for 'bitmap' or 'big'; reader's choice.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
---
 libxfs/xfs_format.h   | 2 +-
 libxfs/xfs_rtbitmap.h | 2 +-
 libxfs/xfs_types.h    | 1 +
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index 371dc0723..20acb8573 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -98,7 +98,7 @@ typedef struct xfs_sb {
 	uint32_t	sb_blocksize;	/* logical block size, bytes */
 	xfs_rfsblock_t	sb_dblocks;	/* number of data blocks */
 	xfs_rfsblock_t	sb_rblocks;	/* number of realtime blocks */
-	xfs_rtblock_t	sb_rextents;	/* number of realtime extents */
+	xfs_rtbxlen_t	sb_rextents;	/* number of realtime extents */
 	uuid_t		sb_uuid;	/* user-visible file system unique id */
 	xfs_fsblock_t	sb_logstart;	/* starting block of log if internal */
 	xfs_ino_t	sb_rootino;	/* root inode number */
diff --git a/libxfs/xfs_rtbitmap.h b/libxfs/xfs_rtbitmap.h
index e2ea6d31c..b0a81fb8d 100644
--- a/libxfs/xfs_rtbitmap.h
+++ b/libxfs/xfs_rtbitmap.h
@@ -13,7 +13,7 @@
  */
 struct xfs_rtalloc_rec {
 	xfs_rtblock_t		ar_startext;
-	xfs_rtblock_t		ar_extcount;
+	xfs_rtbxlen_t		ar_extcount;
 };
 
 typedef int (*xfs_rtalloc_query_range_fn)(
diff --git a/libxfs/xfs_types.h b/libxfs/xfs_types.h
index 713cb7031..9af98a975 100644
--- a/libxfs/xfs_types.h
+++ b/libxfs/xfs_types.h
@@ -32,6 +32,7 @@ typedef uint64_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
 typedef uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
 typedef uint64_t	xfs_fileoff_t;	/* block number in a file */
 typedef uint64_t	xfs_filblks_t;	/* number of blocks in a file */
+typedef uint64_t	xfs_rtbxlen_t;	/* rtbitmap extent length in rtextents */
 
 typedef int64_t		xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
 
-- 
2.43.0