xfs: turn the allocbt cursor active field into a btree flag

Add a new XFS_BTREE_ALLOCBT_ACTIVE flag to replace the active field.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/xfs/libxfs/xfs_alloc.c

@@ -165,7 +165,10 @@ xfs_alloc_lookup(
 	cur->bc_rec.a.ar_startblock = bno;
 	cur->bc_rec.a.ar_blockcount = len;
 	error = xfs_btree_lookup(cur, dir, stat);
-	cur->bc_ag.abt.active = (*stat == 1);
+	if (*stat == 1)
+		cur->bc_flags |= XFS_BTREE_ALLOCBT_ACTIVE;
+	else
+		cur->bc_flags &= ~XFS_BTREE_ALLOCBT_ACTIVE;
 	return error;
 }
 
@@ -214,7 +217,7 @@ static inline bool
 xfs_alloc_cur_active(
 	struct xfs_btree_cur	*cur)
 {
-	return cur && cur->bc_ag.abt.active;
+	return cur && (cur->bc_flags & XFS_BTREE_ALLOCBT_ACTIVE);
 }
 
 /*
@@ -992,7 +995,7 @@ xfs_alloc_cur_check(
 		deactivate = true;
 out:
 	if (deactivate)
-		cur->bc_ag.abt.active = false;
+		cur->bc_flags &= ~XFS_BTREE_ALLOCBT_ACTIVE;
 	trace_xfs_alloc_cur_check(args->mp, cur->bc_btnum, bno, len, diff,
 				  *new);
 	return 0;
@@ -1367,7 +1370,7 @@ xfs_alloc_walk_iter(
 		if (error)
 			return error;
 		if (i == 0)
-			cur->bc_ag.abt.active = false;
+			cur->bc_flags &= ~XFS_BTREE_ALLOCBT_ACTIVE;
 
 		if (count > 0)
 			count--;
@@ -1481,7 +1484,7 @@ xfs_alloc_ag_vextent_locality(
 		if (error)
 			return error;
 		if (i) {
-			acur->cnt->bc_ag.abt.active = true;
+			acur->cnt->bc_flags |= XFS_BTREE_ALLOCBT_ACTIVE;
 			fbcur = acur->cnt;
 			fbinc = false;
 		}

fs/xfs/libxfs/xfs_alloc_btree.c

@@ -523,7 +523,6 @@ xfs_allocbt_init_common(
 				mp->m_alloc_maxlevels, xfs_allocbt_cur_cache);
 		cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtb_2);
 	}
-	cur->bc_ag.abt.active = false;
 
 	cur->bc_ag.pag = xfs_perag_hold(pag);
 

fs/xfs/libxfs/xfs_btree.h

@@ -236,9 +236,6 @@ struct xfs_btree_cur_ag {
 			unsigned int	nr_ops;	/* # record updates */
 			unsigned int	shape_changes;	/* # of extent splits */
 		} refc;
-		struct {
-			bool		active;	/* allocation cursor state */
-		} abt;
 	};
 };
 
@@ -321,6 +318,9 @@ xfs_btree_cur_sizeof(unsigned int nlevels)
 /* For extent swap, ignore owner check in verifier (only for bmbt btrees) */
 #define	XFS_BTREE_BMBT_INVALID_OWNER	(1U << 2)
 
+/* Cursor is active (only for allocbt btrees) */
+#define	XFS_BTREE_ALLOCBT_ACTIVE	(1U << 3)
+
 #define	XFS_BTREE_NOERROR	0
 #define	XFS_BTREE_ERROR		1