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Merge pull request #3740 from MichaelEischer/fix-restore-size-stats
Fix restore size calculation for multiple snapshots
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commit
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8
changelog/unreleased/issue-3736
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8
changelog/unreleased/issue-3736
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@ -0,0 +1,8 @@
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Bugfix: `stats` fix restore size calculation for multiple snapshots
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Since restic 0.10.0 the restore size calculated by the `stats` command for
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multiple snapshots was too low. The hardlink detection was accidentally applied
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across multiple snapshots and thus ignored many files. This has been fixed.
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https://github.com/restic/restic/issues/3736
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https://github.com/restic/restic/pull/3740
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@ -111,7 +111,6 @@ func runStats(gopts GlobalOptions, args []string) error {
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// create a container for the stats (and other needed state)
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stats := &statsContainer{
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uniqueFiles: make(map[fileID]struct{}),
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uniqueInodes: make(map[uint64]struct{}),
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fileBlobs: make(map[string]restic.IDSet),
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blobs: restic.NewBlobSet(),
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snapshotsCount: 0,
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@ -175,7 +174,8 @@ func statsWalkSnapshot(ctx context.Context, snapshot *restic.Snapshot, repo rest
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return restic.FindUsedBlobs(ctx, repo, restic.IDs{*snapshot.Tree}, stats.blobs, nil)
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}
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err := walker.Walk(ctx, repo, *snapshot.Tree, restic.NewIDSet(), statsWalkTree(repo, stats))
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uniqueInodes := make(map[uint64]struct{})
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err := walker.Walk(ctx, repo, *snapshot.Tree, restic.NewIDSet(), statsWalkTree(repo, stats, uniqueInodes))
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if err != nil {
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return fmt.Errorf("walking tree %s: %v", *snapshot.Tree, err)
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}
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@ -183,7 +183,7 @@ func statsWalkSnapshot(ctx context.Context, snapshot *restic.Snapshot, repo rest
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return nil
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}
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func statsWalkTree(repo restic.Repository, stats *statsContainer) walker.WalkFunc {
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func statsWalkTree(repo restic.Repository, stats *statsContainer, uniqueInodes map[uint64]struct{}) walker.WalkFunc {
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return func(parentTreeID restic.ID, npath string, node *restic.Node, nodeErr error) (bool, error) {
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if nodeErr != nil {
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return true, nodeErr
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@ -242,8 +242,8 @@ func statsWalkTree(repo restic.Repository, stats *statsContainer) walker.WalkFun
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// if inodes are present, only count each inode once
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// (hard links do not increase restore size)
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if _, ok := stats.uniqueInodes[node.Inode]; !ok || node.Inode == 0 {
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stats.uniqueInodes[node.Inode] = struct{}{}
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if _, ok := uniqueInodes[node.Inode]; !ok || node.Inode == 0 {
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uniqueInodes[node.Inode] = struct{}{}
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stats.TotalSize += node.Size
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}
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@ -290,10 +290,6 @@ type statsContainer struct {
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// contents (hashed sequence of content blob IDs)
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uniqueFiles map[fileID]struct{}
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// uniqueInodes marks visited files according to their
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// inode # (hashed sequence of inode numbers)
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uniqueInodes map[uint64]struct{}
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// fileBlobs maps a file name (path) to the set of
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// blobs that have been seen as a part of the file
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fileBlobs map[string]restic.IDSet
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