xfs: cull repair code that will never get used

These two functions date from the era when I thought that we could
rebuild btrees by creating an alternate root and adding records one by
one.  In other words, they predate the btree bulk loader.  They're not
necessary now, so remove them.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

Author: Darrick J. Wong

fs/xfs/scrub/repair.c

@@ -297,89 +297,6 @@ xrep_calc_ag_resblks(
 	return max(max(bnobt_sz, inobt_sz), max(rmapbt_sz, refcbt_sz));
 }
 
-/* Allocate a block in an AG. */
-int
-xrep_alloc_ag_block(
-	struct xfs_scrub		*sc,
-	const struct xfs_owner_info	*oinfo,
-	xfs_fsblock_t			*fsbno,
-	enum xfs_ag_resv_type		resv)
-{
-	struct xfs_alloc_arg		args = {0};
-	xfs_agblock_t			bno;
-	int				error;
-
-	switch (resv) {
-	case XFS_AG_RESV_AGFL:
-	case XFS_AG_RESV_RMAPBT:
-		error = xfs_alloc_get_freelist(sc->sa.pag, sc->tp,
-				sc->sa.agf_bp, &bno, 1);
-		if (error)
-			return error;
-		if (bno == NULLAGBLOCK)
-			return -ENOSPC;
-		xfs_extent_busy_reuse(sc->mp, sc->sa.pag, bno, 1, false);
-		*fsbno = XFS_AGB_TO_FSB(sc->mp, sc->sa.pag->pag_agno, bno);
-		if (resv == XFS_AG_RESV_RMAPBT)
-			xfs_ag_resv_rmapbt_alloc(sc->mp, sc->sa.pag->pag_agno);
-		return 0;
-	default:
-		break;
-	}
-
-	args.tp = sc->tp;
-	args.mp = sc->mp;
-	args.pag = sc->sa.pag;
-	args.oinfo = *oinfo;
-	args.minlen = 1;
-	args.maxlen = 1;
-	args.prod = 1;
-	args.resv = resv;
-
-	error = xfs_alloc_vextent_this_ag(&args, sc->sa.pag->pag_agno);
-	if (error)
-		return error;
-	if (args.fsbno == NULLFSBLOCK)
-		return -ENOSPC;
-	ASSERT(args.len == 1);
-	*fsbno = args.fsbno;
-
-	return 0;
-}
-
-/* Initialize a new AG btree root block with zero entries. */
-int
-xrep_init_btblock(
-	struct xfs_scrub		*sc,
-	xfs_fsblock_t			fsb,
-	struct xfs_buf			**bpp,
-	xfs_btnum_t			btnum,
-	const struct xfs_buf_ops	*ops)
-{
-	struct xfs_trans		*tp = sc->tp;
-	struct xfs_mount		*mp = sc->mp;
-	struct xfs_buf			*bp;
-	int				error;
-
-	trace_xrep_init_btblock(mp, XFS_FSB_TO_AGNO(mp, fsb),
-			XFS_FSB_TO_AGBNO(mp, fsb), btnum);
-
-	ASSERT(XFS_FSB_TO_AGNO(mp, fsb) == sc->sa.pag->pag_agno);
-	error = xfs_trans_get_buf(tp, mp->m_ddev_targp,
-			XFS_FSB_TO_DADDR(mp, fsb), XFS_FSB_TO_BB(mp, 1), 0,
-			&bp);
-	if (error)
-		return error;
-	xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
-	xfs_btree_init_block(mp, bp, btnum, 0, 0, sc->sa.pag->pag_agno);
-	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_BTREE_BUF);
-	xfs_trans_log_buf(tp, bp, 0, BBTOB(bp->b_length) - 1);
-	bp->b_ops = ops;
-	*bpp = bp;
-
-	return 0;
-}
-
 /*
  * Reconstructing per-AG Btrees
  *

fs/xfs/scrub/repair.h

@@ -23,12 +23,6 @@ int xrep_roll_ag_trans(struct xfs_scrub *sc);
 bool xrep_ag_has_space(struct xfs_perag *pag, xfs_extlen_t nr_blocks,
 		enum xfs_ag_resv_type type);
 xfs_extlen_t xrep_calc_ag_resblks(struct xfs_scrub *sc);
-int xrep_alloc_ag_block(struct xfs_scrub *sc,
-		const struct xfs_owner_info *oinfo, xfs_fsblock_t *fsbno,
-		enum xfs_ag_resv_type resv);
-int xrep_init_btblock(struct xfs_scrub *sc, xfs_fsblock_t fsb,
-		struct xfs_buf **bpp, xfs_btnum_t btnum,
-		const struct xfs_buf_ops *ops);
 
 struct xbitmap;
 struct xagb_bitmap;

fs/xfs/scrub/trace.h

@@ -827,28 +827,6 @@ TRACE_EVENT(xrep_refcount_extent_fn,
 		  __entry->refcount)
 )
 
-TRACE_EVENT(xrep_init_btblock,
-	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agblock_t agbno,
-		 xfs_btnum_t btnum),
-	TP_ARGS(mp, agno, agbno, btnum),
-	TP_STRUCT__entry(
-		__field(dev_t, dev)
-		__field(xfs_agnumber_t, agno)
-		__field(xfs_agblock_t, agbno)
-		__field(uint32_t, btnum)
-	),
-	TP_fast_assign(
-		__entry->dev = mp->m_super->s_dev;
-		__entry->agno = agno;
-		__entry->agbno = agbno;
-		__entry->btnum = btnum;
-	),
-	TP_printk("dev %d:%d agno 0x%x agbno 0x%x btree %s",
-		  MAJOR(__entry->dev), MINOR(__entry->dev),
-		  __entry->agno,
-		  __entry->agbno,
-		  __print_symbolic(__entry->btnum, XFS_BTNUM_STRINGS))
-)
 TRACE_EVENT(xrep_findroot_block,
 	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agblock_t agbno,
 		 uint32_t magic, uint16_t level),