xfs: set the scrub AG number in xchk_ag_read_headers

Since xchk_ag_read_headers initializes fields in struct xchk_ag, we
might as well set the AG number and save the callers the trouble.
Signed-off-by: NDarrick J. Wong <djwong@kernel.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

fs/xfs/scrub/agheader.c

@@ -508,7 +508,7 @@ xchk_agf(
 	struct xfs_mount	*mp = sc->mp;
 	struct xfs_agf		*agf;
 	struct xfs_perag	*pag;
-	xfs_agnumber_t		agno;
+	xfs_agnumber_t		agno = sc->sm->sm_agno;
 	xfs_agblock_t		agbno;
 	xfs_agblock_t		eoag;
 	xfs_agblock_t		agfl_first;
@@ -518,9 +518,7 @@ xchk_agf(
 	int			level;
 	int			error = 0;
 
-	agno = sc->sa.agno = sc->sm->sm_agno;
-	error = xchk_ag_read_headers(sc, agno, &sc->sa.agi_bp,
-			&sc->sa.agf_bp, &sc->sa.agfl_bp);
+	error = xchk_ag_read_headers(sc, agno, &sc->sa);
 	if (!xchk_process_error(sc, agno, XFS_AGF_BLOCK(sc->mp), &error))
 		goto out;
 	xchk_buffer_recheck(sc, sc->sa.agf_bp);
@@ -691,14 +689,12 @@ xchk_agfl(
 {
 	struct xchk_agfl_info	sai;
 	struct xfs_agf		*agf;
-	xfs_agnumber_t		agno;
+	xfs_agnumber_t		agno = sc->sm->sm_agno;
 	unsigned int		agflcount;
 	unsigned int		i;
 	int			error;
 
-	agno = sc->sa.agno = sc->sm->sm_agno;
-	error = xchk_ag_read_headers(sc, agno, &sc->sa.agi_bp,
-			&sc->sa.agf_bp, &sc->sa.agfl_bp);
+	error = xchk_ag_read_headers(sc, agno, &sc->sa);
 	if (!xchk_process_error(sc, agno, XFS_AGFL_BLOCK(sc->mp), &error))
 		goto out;
 	if (!sc->sa.agf_bp)
@@ -846,7 +842,7 @@ xchk_agi(
 	struct xfs_mount	*mp = sc->mp;
 	struct xfs_agi		*agi;
 	struct xfs_perag	*pag;
-	xfs_agnumber_t		agno;
+	xfs_agnumber_t		agno = sc->sm->sm_agno;
 	xfs_agblock_t		agbno;
 	xfs_agblock_t		eoag;
 	xfs_agino_t		agino;
@@ -857,9 +853,7 @@ xchk_agi(
 	int			level;
 	int			error = 0;
 
-	agno = sc->sa.agno = sc->sm->sm_agno;
-	error = xchk_ag_read_headers(sc, agno, &sc->sa.agi_bp,
-			&sc->sa.agf_bp, &sc->sa.agfl_bp);
+	error = xchk_ag_read_headers(sc, agno, &sc->sa);
 	if (!xchk_process_error(sc, agno, XFS_AGI_BLOCK(sc->mp), &error))
 		goto out;
 	xchk_buffer_recheck(sc, sc->sa.agi_bp);

fs/xfs/scrub/common.c

@@ -402,22 +402,22 @@ int
 xchk_ag_read_headers(
 	struct xfs_scrub	*sc,
 	xfs_agnumber_t		agno,
-	struct xfs_buf		**agi,
-	struct xfs_buf		**agf,
-	struct xfs_buf		**agfl)
+	struct xchk_ag		*sa)
 {
 	struct xfs_mount	*mp = sc->mp;
 	int			error;
 
-	error = xfs_ialloc_read_agi(mp, sc->tp, agno, agi);
+	sa->agno = agno;
+
+	error = xfs_ialloc_read_agi(mp, sc->tp, agno, &sa->agi_bp);
 	if (error && want_ag_read_header_failure(sc, XFS_SCRUB_TYPE_AGI))
 		goto out;
 
-	error = xfs_alloc_read_agf(mp, sc->tp, agno, 0, agf);
+	error = xfs_alloc_read_agf(mp, sc->tp, agno, 0, &sa->agf_bp);
 	if (error && want_ag_read_header_failure(sc, XFS_SCRUB_TYPE_AGF))
 		goto out;
 
-	error = xfs_alloc_read_agfl(mp, sc->tp, agno, agfl);
+	error = xfs_alloc_read_agfl(mp, sc->tp, agno, &sa->agfl_bp);
 	if (error && want_ag_read_header_failure(sc, XFS_SCRUB_TYPE_AGFL))
 		goto out;
 	error = 0;
@@ -547,9 +547,7 @@ xchk_ag_init(
 {
 	int			error;
 
-	sa->agno = agno;
-	error = xchk_ag_read_headers(sc, agno, &sa->agi_bp,
-			&sa->agf_bp, &sa->agfl_bp);
+	error = xchk_ag_read_headers(sc, agno, sa);
 	if (error)
 		return error;
 

fs/xfs/scrub/common.h

@@ -120,8 +120,7 @@ int xchk_ag_init(struct xfs_scrub *sc, xfs_agnumber_t agno,
 		struct xchk_ag *sa);
 void xchk_perag_get(struct xfs_mount *mp, struct xchk_ag *sa);
 int xchk_ag_read_headers(struct xfs_scrub *sc, xfs_agnumber_t agno,
-		struct xfs_buf **agi, struct xfs_buf **agf,
-		struct xfs_buf **agfl);
+		struct xchk_ag *sa);
 void xchk_ag_btcur_free(struct xchk_ag *sa);
 int xchk_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa);
 int xchk_count_rmap_ownedby_ag(struct xfs_scrub *sc, struct xfs_btree_cur *cur,