diff options
Diffstat (limited to 'lib/btrfsprogs/btrfsinspect/csums.go')
| -rw-r--r-- | lib/btrfsprogs/btrfsinspect/csums.go | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/lib/btrfsprogs/btrfsinspect/csums.go b/lib/btrfsprogs/btrfsinspect/csums.go index a062a77..78bf915 100644 --- a/lib/btrfsprogs/btrfsinspect/csums.go +++ b/lib/btrfsprogs/btrfsinspect/csums.go @@ -6,22 +6,10 @@ package btrfsinspect import ( "context" - "encoding/gob" "io" - "math" - "os" - "runtime" - "strings" - "sync" - "github.com/datawire/dlib/dgroup" - "github.com/datawire/dlib/dlog" - - "git.lukeshu.com/btrfs-progs-ng/lib/btrfs" "git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsitem" - "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/btrfsutil" "git.lukeshu.com/btrfs-progs-ng/lib/diskio" ) @@ -123,194 +111,3 @@ func (sg SumRunWithGaps[Addr]) Get(sumIdx int64) (ShortSum, error) { addr := sg.Addr.Add(btrfsvol.AddrDelta(sumIdx) * btrfsitem.CSumBlockSize) return sg.SumForAddr(addr) } - -// AllSums /////////////////////////////////////////////////////////// - -type AllSums struct { - Logical []SumRun[btrfsvol.LogicalAddr] - Physical map[btrfsvol.DeviceID]SumRun[btrfsvol.PhysicalAddr] -} - -func (as AllSums) SumForPAddr(paddr btrfsvol.QualifiedPhysicalAddr) (ShortSum, bool) { - run, ok := as.Physical[paddr.Dev] - if !ok { - return "", false - } - return run.SumForAddr(paddr.Addr) -} - -func (as AllSums) RunForLAddr(laddr btrfsvol.LogicalAddr) (SumRun[btrfsvol.LogicalAddr], btrfsvol.LogicalAddr, bool) { - for _, run := range as.Logical { - if run.Addr > laddr { - return SumRun[btrfsvol.LogicalAddr]{}, run.Addr, false - } - if run.Addr.Add(run.Size()) <= laddr { - continue - } - return run, 0, true - } - return SumRun[btrfsvol.LogicalAddr]{}, math.MaxInt64, false -} - -func (as AllSums) SumForLAddr(laddr btrfsvol.LogicalAddr) (ShortSum, bool) { - run, _, ok := as.RunForLAddr(laddr) - if !ok { - return "", false - } - return run.SumForAddr(laddr) -} - -func (as AllSums) WalkLogical(ctx context.Context, fn func(btrfsvol.LogicalAddr, ShortSum) error) error { - for _, run := range as.Logical { - if err := run.Walk(ctx, fn); err != nil { - return err - } - } - return nil -} - -// Read/Write AllSums //////////////////////////////////////////////// - -func ReadAllSums(filename string) (AllSums, error) { - fh, err := os.Open(filename) - if err != nil { - return AllSums{}, err - } - defer fh.Close() - var val AllSums - if err := gob.NewDecoder(fh).Decode(&val); err != nil { - return AllSums{}, err - } - return val, nil -} - -func WriteAllSums(w io.Writer, sums AllSums) error { - return gob.NewEncoder(w).Encode(sums) -} - -func SumEverything(ctx context.Context, fs *btrfs.FS) (AllSums, error) { - var ret AllSums - - // ChecksumSize - var alg btrfssum.CSumType - var csumSize int - if err := func() error { - sb, err := fs.Superblock() - if err != nil { - return err - } - alg = sb.ChecksumType - csumSize = alg.Size() - return nil - }(); err != nil { - return ret, err - } - - // Logical - dlog.Info(ctx, "Walking CSUM_TREE...") - func() { - var curAddr btrfsvol.LogicalAddr - var curSums strings.Builder - btrfsutil.NewBrokenTrees(ctx, fs).TreeWalk(ctx, btrfs.CSUM_TREE_OBJECTID, - func(err *btrfs.TreeError) { - dlog.Error(ctx, err) - }, - btrfs.TreeWalkHandler{ - Item: func(path btrfs.TreePath, item btrfs.Item) error { - if item.Key.ItemType != btrfsitem.EXTENT_CSUM_KEY { - return nil - } - body := item.Body.(btrfsitem.ExtentCSum) - - for i, sum := range body.Sums { - laddr := btrfsvol.LogicalAddr(item.Key.Offset) + (btrfsvol.LogicalAddr(i) * btrfsitem.CSumBlockSize) - if laddr != curAddr+(btrfsvol.LogicalAddr(curSums.Len()/csumSize)*btrfsitem.CSumBlockSize) { - if curSums.Len() > 0 { - ret.Logical = append(ret.Logical, SumRun[btrfsvol.LogicalAddr]{ - ChecksumSize: csumSize, - Addr: curAddr, - Sums: curSums.String(), - }) - } - curAddr = laddr - curSums.Reset() - } - curSums.Write(sum[:csumSize]) - } - return nil - }, - }, - ) - if curSums.Len() > 0 { - ret.Logical = append(ret.Logical, SumRun[btrfsvol.LogicalAddr]{ - ChecksumSize: csumSize, - Addr: curAddr, - Sums: curSums.String(), - }) - } - }() - if err := ctx.Err(); err != nil { - return ret, err - } - dlog.Info(ctx, "... done walking") - runtime.GC() - dlog.Info(ctx, "... GC'd") - - // Physical - dlog.Info(ctx, "Summing devices...") - if err := func() error { - devs := fs.LV.PhysicalVolumes() - - var mu sync.Mutex - ret.Physical = make(map[btrfsvol.DeviceID]SumRun[btrfsvol.PhysicalAddr], len(devs)) - - grp := dgroup.NewGroup(ctx, dgroup.GroupConfig{}) - for devID, dev := range devs { - devID, dev := devID, dev - grp.Go(dev.Name(), func(ctx context.Context) error { - devSize := dev.Size() - numSums := int(devSize / btrfsitem.CSumBlockSize) - sums := make([]byte, numSums*csumSize) - lastPct := -1 - progress := func(curSum int) { - pct := int(100 * float64(curSum) / float64(numSums)) - if pct != lastPct || curSum == numSums { - dlog.Infof(ctx, "... dev[%q] summed %v%%", - dev.Name(), pct) - lastPct = pct - } - } - for i := 0; i < numSums; i++ { - if err := ctx.Err(); err != nil { - return err - } - progress(i) - sum, err := btrfsutil.ChecksumPhysical(dev, alg, btrfsvol.PhysicalAddr(i*btrfsitem.CSumBlockSize)) - if err != nil { - return err - } - copy(sums[i*csumSize:], sum[:csumSize]) - } - progress(numSums) - sumsStr := string(sums) - mu.Lock() - ret.Physical[devID] = SumRun[btrfsvol.PhysicalAddr]{ - ChecksumSize: csumSize, - Addr: 0, - Sums: sumsStr, - } - mu.Unlock() - return nil - }) - } - return grp.Wait() - }(); err != nil { - return ret, err - } - dlog.Info(ctx, "... done summing devices") - runtime.GC() - dlog.Info(ctx, "... GC'd") - - // Return - return ret, nil -} |