wip: work on rebuildmappings

1 files changed, 0 insertions, 119 deletions

diff --git a/lib/btrfsprogs/btrfsinspect/rebuildmappings/csumitems.go b/lib/btrfsprogs/btrfsinspect/rebuildmappings/csumitems.go
deleted file mode 100644
index eaa6f06..0000000
--- a/lib/btrfsprogs/btrfsinspect/rebuildmappings/csumitems.go
+++ /dev/null
@@ -1,119 +0,0 @@
-// Copyright (C) 2022  Luke Shumaker <lukeshu@lukeshu.com>
-//
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package rebuildmappings
-
-import (
-	"context"
-	"strings"
-
-	"github.com/datawire/dlib/dlog"
-
-	"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/btrfsprogs/btrfsinspect"
-	"git.lukeshu.com/btrfs-progs-ng/lib/maps"
-	"git.lukeshu.com/btrfs-progs-ng/lib/slices"
-)
-
-func MapLogicalSums(ctx context.Context, scanResults btrfsinspect.ScanDevicesResult) btrfssum.SumRunWithGaps[btrfsvol.LogicalAddr] {
-	dlog.Info(ctx, "Mapping the logical address space...")
-	type record struct {
-		Gen btrfs.Generation
-		Sum btrfssum.ShortSum
-	}
-	addrspace := make(map[btrfsvol.LogicalAddr]record)
-	var sumSize int
-	for _, devResults := range scanResults {
-		sumSize = devResults.Checksums.ChecksumSize
-		for _, sumItem := range devResults.FoundExtentCSums {
-			_ = sumItem.Sums.Walk(ctx, func(pos btrfsvol.LogicalAddr, sum btrfssum.ShortSum) error {
-				new := record{
-					Gen: sumItem.Generation,
-					Sum: sum,
-				}
-				if old, ok := addrspace[pos]; ok {
-					switch {
-					case old.Gen > new.Gen:
-						// do nothing
-					case old.Gen < new.Gen:
-						addrspace[pos] = new
-					case old.Gen == new.Gen:
-						if old != new {
-							dlog.Errorf(ctx, "mismatch of laddr=%v sum: %v != %v", pos, old, new)
-						}
-					}
-				} else {
-					addrspace[pos] = new
-				}
-				return nil
-			})
-		}
-	}
-	dlog.Info(ctx, "... done mapping")
-
-	var flattened btrfssum.SumRunWithGaps[btrfsvol.LogicalAddr]
-	if len(addrspace) == 0 {
-		return flattened
-	}
-
-	dlog.Info(ctx, "Flattening the map ...")
-	var curAddr btrfsvol.LogicalAddr
-	var curSums strings.Builder
-	for _, laddr := range maps.SortedKeys(addrspace) {
-		if laddr != curAddr+(btrfsvol.LogicalAddr(curSums.Len()/sumSize)*btrfssum.BlockSize) {
-			if curSums.Len() > 0 {
-				flattened.Runs = append(flattened.Runs, btrfssum.SumRun[btrfsvol.LogicalAddr]{
-					ChecksumSize: sumSize,
-					Addr:         curAddr,
-					Sums:         btrfssum.ShortSum(curSums.String()),
-				})
-			}
-			curAddr = laddr
-			curSums.Reset()
-		}
-		curSums.WriteString(string(addrspace[laddr].Sum))
-	}
-	if curSums.Len() > 0 {
-		flattened.Runs = append(flattened.Runs, btrfssum.SumRun[btrfsvol.LogicalAddr]{
-			ChecksumSize: sumSize,
-			Addr:         curAddr,
-			Sums:         btrfssum.ShortSum(curSums.String()),
-		})
-	}
-	flattened.Addr = flattened.Runs[0].Addr
-	last := flattened.Runs[len(flattened.Runs)-1]
-	end := last.Addr.Add(last.Size())
-	flattened.Size = end.Sub(flattened.Addr)
-	dlog.Info(ctx, "... done flattening")
-
-	return flattened
-}
-
-func SumsForLogicalRegion(sums btrfssum.SumRunWithGaps[btrfsvol.LogicalAddr], beg btrfsvol.LogicalAddr, size btrfsvol.AddrDelta) btrfssum.SumRunWithGaps[btrfsvol.LogicalAddr] {
-	runs := btrfssum.SumRunWithGaps[btrfsvol.LogicalAddr]{
-		Addr: beg,
-		Size: size,
-	}
-	for laddr := beg; laddr < beg.Add(size); {
-		run, next, ok := sums.RunForAddr(laddr)
-		if !ok {
-			laddr = next
-			continue
-		}
-		off := int((laddr-run.Addr)/btrfssum.BlockSize) * run.ChecksumSize
-		deltaAddr := slices.Min[btrfsvol.AddrDelta](
-			size-laddr.Sub(beg),
-			btrfsvol.AddrDelta((len(run.Sums)-off)/run.ChecksumSize)*btrfssum.BlockSize)
-		deltaOff := int(deltaAddr/btrfssum.BlockSize) * run.ChecksumSize
-		runs.Runs = append(runs.Runs, btrfssum.SumRun[btrfsvol.LogicalAddr]{
-			ChecksumSize: run.ChecksumSize,
-			Addr:         laddr,
-			Sums:         run.Sums[off : off+deltaOff],
-		})
-		laddr = laddr.Add(deltaAddr)
-	}
-	return runs
-}