From c95ae0b25133dc068e3d471a4a2c798be45b7930 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Wed, 24 Aug 2022 09:27:49 -0600
Subject: wip: work on rebuildmappings

---
 .../rebuildmappings/unmappedregions.go             | 80 ----------------------
 1 file changed, 80 deletions(-)
 delete mode 100644 lib/btrfsprogs/btrfsinspect/rebuildmappings/unmappedregions.go

(limited to 'lib/btrfsprogs/btrfsinspect/rebuildmappings/unmappedregions.go')

diff --git a/lib/btrfsprogs/btrfsinspect/rebuildmappings/unmappedregions.go b/lib/btrfsprogs/btrfsinspect/rebuildmappings/unmappedregions.go
deleted file mode 100644
index 1bac127..0000000
--- a/lib/btrfsprogs/btrfsinspect/rebuildmappings/unmappedregions.go
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright (C) 2022  Luke Shumaker <lukeshu@lukeshu.com>
-//
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package rebuildmappings
-
-import (
-	"context"
-	"sort"
-
-	"golang.org/x/exp/constraints"
-
-	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
-	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfssum"
-	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
-	"git.lukeshu.com/btrfs-progs-ng/lib/maps"
-)
-
-type PhysicalRegion struct {
-	Beg, End btrfsvol.PhysicalAddr
-}
-
-func ListUnmappedPhysicalRegions(fs *btrfs.FS) map[btrfsvol.DeviceID][]PhysicalRegion {
-	regions := make(map[btrfsvol.DeviceID][]PhysicalRegion)
-	pos := make(map[btrfsvol.DeviceID]btrfsvol.PhysicalAddr)
-	mappings := fs.LV.Mappings()
-	sort.Slice(mappings, func(i, j int) bool {
-		return mappings[i].PAddr.Cmp(mappings[j].PAddr) < 0
-	})
-	for _, mapping := range mappings {
-		if pos[mapping.PAddr.Dev] < mapping.PAddr.Addr {
-			regions[mapping.PAddr.Dev] = append(regions[mapping.PAddr.Dev], PhysicalRegion{
-				Beg: pos[mapping.PAddr.Dev],
-				End: mapping.PAddr.Addr,
-			})
-		}
-		if pos[mapping.PAddr.Dev] < mapping.PAddr.Addr.Add(mapping.Size) {
-			pos[mapping.PAddr.Dev] = mapping.PAddr.Addr.Add(mapping.Size)
-		}
-	}
-	for devID, dev := range fs.LV.PhysicalVolumes() {
-		devSize := dev.Size()
-		if pos[devID] < devSize {
-			regions[devID] = append(regions[devID], PhysicalRegion{
-				Beg: pos[devID],
-				End: devSize,
-			})
-		}
-	}
-	return regions
-}
-
-func roundUp[T constraints.Integer](x, multiple T) T {
-	return ((x + multiple - 1) / multiple) * multiple
-}
-
-func WalkUnmappedPhysicalRegions(ctx context.Context,
-	physicalSums map[btrfsvol.DeviceID]btrfssum.SumRun[btrfsvol.PhysicalAddr],
-	gaps map[btrfsvol.DeviceID][]PhysicalRegion,
-	fn func(btrfsvol.DeviceID, btrfssum.SumRun[btrfsvol.PhysicalAddr]) error,
-) error {
-	for _, devID := range maps.SortedKeys(gaps) {
-		for _, gap := range gaps[devID] {
-			if err := ctx.Err(); err != nil {
-				return err
-			}
-			begAddr := roundUp(gap.Beg, btrfssum.BlockSize)
-			begOff := int(begAddr/btrfssum.BlockSize) * physicalSums[devID].ChecksumSize
-			endOff := int(gap.End/btrfssum.BlockSize) * physicalSums[devID].ChecksumSize
-			if err := fn(devID, btrfssum.SumRun[btrfsvol.PhysicalAddr]{
-				ChecksumSize: physicalSums[devID].ChecksumSize,
-				Addr:         begAddr,
-				Sums:         physicalSums[devID].Sums[begOff:endOff],
-			}); err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-- 
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