diff options
Diffstat (limited to 'lib/btrfsprogs/btrfsinspect/rebuildmappings.go')
-rw-r--r-- | lib/btrfsprogs/btrfsinspect/rebuildmappings.go | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/lib/btrfsprogs/btrfsinspect/rebuildmappings.go b/lib/btrfsprogs/btrfsinspect/rebuildmappings.go deleted file mode 100644 index bbfd6b7..0000000 --- a/lib/btrfsprogs/btrfsinspect/rebuildmappings.go +++ /dev/null @@ -1,130 +0,0 @@ -// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com> -// -// SPDX-License-Identifier: GPL-2.0-or-later - -package btrfsinspect - -import ( - "context" - "sort" - - "github.com/datawire/dlib/dlog" - - "git.lukeshu.com/btrfs-progs-ng/lib/btrfs" - "git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol" - "git.lukeshu.com/btrfs-progs-ng/lib/containers" - "git.lukeshu.com/btrfs-progs-ng/lib/maps" -) - -func (found ScanOneDeviceResult) AddToLV(ctx context.Context, fs *btrfs.FS, dev *btrfs.Device) { - sb, _ := dev.Superblock() - - total := len(found.FoundChunks) + len(found.FoundDevExtents) - for _, paddrs := range found.FoundNodes { - total += len(paddrs) - } - lastProgress := -1 - done := 0 - printProgress := func() { - pct := int(100 * float64(done) / float64(total)) - if pct != lastProgress || done == total { - dlog.Infof(ctx, "... dev[%q] added %v%% of the mappings (%v/%v=>%v)", - dev.Name(), pct, done, total, len(fs.LV.Mappings())) - lastProgress = pct - } - } - printProgress() - - for _, chunk := range found.FoundChunks { - for _, mapping := range chunk.Chunk.Mappings(chunk.Key) { - if err := fs.LV.AddMapping(mapping); err != nil { - dlog.Errorf(ctx, "... dev[%q] error: adding chunk: %v", - dev.Name(), err) - } - done++ - printProgress() - } - } - - for _, ext := range found.FoundDevExtents { - if err := fs.LV.AddMapping(ext.DevExt.Mapping(ext.Key)); err != nil { - dlog.Errorf(ctx, "... dev[%q] error: adding devext: %v", - dev.Name(), err) - } - done++ - printProgress() - } - - // Do the nodes last to avoid bloating the mappings table too - // much. (Because nodes are numerous and small, while the - // others are few and large; so it is likely that many of the - // nodes will be subsumed by other things.) - // - // Sort them so that progress numbers are predictable. - for _, laddr := range maps.SortedKeys(found.FoundNodes) { - for _, paddr := range found.FoundNodes[laddr] { - if err := fs.LV.AddMapping(btrfsvol.Mapping{ - LAddr: laddr, - PAddr: btrfsvol.QualifiedPhysicalAddr{ - Dev: sb.DevItem.DevID, - Addr: paddr, - }, - Size: btrfsvol.AddrDelta(sb.NodeSize), - SizeLocked: false, - }); err != nil { - dlog.Errorf(ctx, "... dev[%q] error: adding node ident: %v", - dev.Name(), err) - } - done++ - printProgress() - } - } - - // Use block groups to add missing flags (and as a hint to - // combine node entries). - // - // First dedup them, because they change for allocations and - // CoW means that they'll bounce around a lot, so you likely - // have oodles of duplicates? - type blockgroup struct { - LAddr btrfsvol.LogicalAddr - Size btrfsvol.AddrDelta - Flags btrfsvol.BlockGroupFlags - } - bgsSet := make(map[blockgroup]struct{}) - for _, bg := range found.FoundBlockGroups { - bgsSet[blockgroup{ - LAddr: btrfsvol.LogicalAddr(bg.Key.ObjectID), - Size: btrfsvol.AddrDelta(bg.Key.Offset), - Flags: bg.BG.Flags, - }] = struct{}{} - } - bgsOrdered := maps.Keys(bgsSet) - sort.Slice(bgsOrdered, func(i, j int) bool { - return bgsOrdered[i].LAddr < bgsOrdered[j].LAddr - }) - for _, bg := range bgsOrdered { - otherLAddr, otherPAddr := fs.LV.ResolveAny(bg.LAddr, bg.Size) - if otherLAddr < 0 || otherPAddr.Addr < 0 { - dlog.Errorf(ctx, "... dev[%q] error: could not pair blockgroup laddr=%v (size=%v flags=%v) with a mapping", - dev.Name(), bg.LAddr, bg.Size, bg.Flags) - continue - } - - offsetWithinChunk := otherLAddr.Sub(bg.LAddr) - mapping := btrfsvol.Mapping{ - LAddr: bg.LAddr, - PAddr: otherPAddr.Add(-offsetWithinChunk), - Size: bg.Size, - SizeLocked: true, - Flags: containers.Optional[btrfsvol.BlockGroupFlags]{ - OK: true, - Val: bg.Flags, - }, - } - if err := fs.LV.AddMapping(mapping); err != nil { - dlog.Errorf(ctx, "... dev[%q] error: adding flags from blockgroup: %v", - dev.Name(), err) - } - } -} |