xfs: move the repair extent list into its own file

Move the xrep_extent_list code into a separate file.  Logically, this
data structure is really just a clumsy bitmap, and in the next patch
we'll make this more obvious.  No functional changes.

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

1 files changed, 37 insertions, 0 deletions

diff --git a/fs/xfs/scrub/bitmap.h b/fs/xfs/scrub/bitmap.h
new file mode 100644
index 000000000000..1038157695a8
--- /dev/null
+++ b/fs/xfs/scrub/bitmap.h
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_SCRUB_BITMAP_H__
+#define __XFS_SCRUB_BITMAP_H__
+
+struct xrep_extent {
+	struct list_head	list;
+	xfs_fsblock_t		fsbno;
+	xfs_extlen_t		len;
+};
+
+struct xrep_extent_list {
+	struct list_head	list;
+};
+
+static inline void
+xrep_init_extent_list(
+	struct xrep_extent_list		*exlist)
+{
+	INIT_LIST_HEAD(&exlist->list);
+}
+
+#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);
+
+#endif	/* __XFS_SCRUB_BITMAP_H__ */