xfs: refactor the xrep_extent_list into xfs_bitmap

As mentioned previously, the xrep_extent_list basically implements a
bitmap with two functions: set and disjoint union.  Rename all these
functions to xfs_bitmap to shorten the name and make it more obvious
what we're doing.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

1 files changed, 15 insertions, 20 deletions

diff --git a/fs/xfs/scrub/bitmap.h b/fs/xfs/scrub/bitmap.h
index 1038157695a8..dad652ee9177 100644
--- a/fs/xfs/scrub/bitmap.h
+++ b/fs/xfs/scrub/bitmap.h
@@ -6,32 +6,27 @@
 #ifndef __XFS_SCRUB_BITMAP_H__
 #define __XFS_SCRUB_BITMAP_H__
 
-struct xrep_extent {
+struct xfs_bitmap_range {
 	struct list_head	list;
-	xfs_fsblock_t		fsbno;
-	xfs_extlen_t		len;
+	uint64_t		start;
+	uint64_t		len;
 };
 
-struct xrep_extent_list {
+struct xfs_bitmap {
 	struct list_head	list;
 };
 
-static inline void
-xrep_init_extent_list(
-	struct xrep_extent_list		*exlist)
-{
-	INIT_LIST_HEAD(&exlist->list);
-}
+void xfs_bitmap_init(struct xfs_bitmap *bitmap);
+void xfs_bitmap_destroy(struct xfs_bitmap *bitmap);
 
-#define for_each_xrep_extent_safe(rbe, n, exlist) \
-	list_for_each_entry_safe((rbe), (n), &(exlist)->list, list)
-int xrep_collect_btree_extent(struct xfs_scrub *sc,
-		struct xrep_extent_list *btlist, xfs_fsblock_t fsbno,
-		xfs_extlen_t len);
-void xrep_cancel_btree_extents(struct xfs_scrub *sc,
-		struct xrep_extent_list *btlist);
-int xrep_subtract_extents(struct xfs_scrub *sc,
-		struct xrep_extent_list *exlist,
-		struct xrep_extent_list *sublist);
+#define for_each_xfs_bitmap_extent(bex, n, bitmap) \
+	list_for_each_entry_safe((bex), (n), &(bitmap)->list, list)
+
+#define for_each_xfs_bitmap_block(b, bex, n, bitmap) \
+	list_for_each_entry_safe((bex), (n), &(bitmap)->list, list) \
+		for ((b) = bex->start; (b) < bex->start + bex->len; (b)++)
+
+int xfs_bitmap_set(struct xfs_bitmap *bitmap, uint64_t start, uint64_t len);
+int xfs_bitmap_disunion(struct xfs_bitmap *bitmap, struct xfs_bitmap *sub);
 
 #endif	/* __XFS_SCRUB_BITMAP_H__ */