Update deps

vendor/github.com/cockroachdb/pebble/internal/manifest/level_metadata.go

@@ -17,20 +17,26 @@ import (
 type LevelMetadata struct {
 	level     int
 	totalSize uint64
-	tree      btree
+	// NumVirtual is the number of virtual sstables in the level.
+	NumVirtual uint64
+	// VirtualSize is the size of the virtual sstables in the level.
+	VirtualSize uint64
+	tree        btree
 }
 
 // clone makes a copy of the level metadata, implicitly increasing the ref
 // count of every file contained within lm.
 func (lm *LevelMetadata) clone() LevelMetadata {
 	return LevelMetadata{
-		level:     lm.level,
-		totalSize: lm.totalSize,
-		tree:      lm.tree.Clone(),
+		level:       lm.level,
+		totalSize:   lm.totalSize,
+		NumVirtual:  lm.NumVirtual,
+		VirtualSize: lm.VirtualSize,
+		tree:        lm.tree.Clone(),
 	}
 }
 
-func (lm *LevelMetadata) release() (obsolete []*FileMetadata) {
+func (lm *LevelMetadata) release() (obsolete []*FileBacking) {
 	return lm.tree.Release()
 }
 
@@ -44,6 +50,10 @@ func makeLevelMetadata(cmp Compare, level int, files []*FileMetadata) LevelMetad
 	lm.tree, _ = makeBTree(bcmp, files)
 	for _, f := range files {
 		lm.totalSize += f.Size
+		if f.Virtual {
+			lm.NumVirtual++
+			lm.VirtualSize += f.Size
+		}
 	}
 	return lm
 }
@@ -62,11 +72,19 @@ func (lm *LevelMetadata) insert(f *FileMetadata) error {
 		return err
 	}
 	lm.totalSize += f.Size
+	if f.Virtual {
+		lm.NumVirtual++
+		lm.VirtualSize += f.Size
+	}
 	return nil
 }
 
 func (lm *LevelMetadata) remove(f *FileMetadata) bool {
 	lm.totalSize -= f.Size
+	if f.Virtual {
+		lm.NumVirtual--
+		lm.VirtualSize -= f.Size
+	}
 	return lm.tree.Delete(f)
 }
 
@@ -303,6 +321,32 @@ func (ls *LevelSlice) SizeSum() uint64 {
 	return sum
 }
 
+// NumVirtual returns the number of virtual sstables in the level. Its runtime is
+// linear in the length of the slice.
+func (ls *LevelSlice) NumVirtual() uint64 {
+	var n uint64
+	iter := ls.Iter()
+	for f := iter.First(); f != nil; f = iter.Next() {
+		if f.Virtual {
+			n++
+		}
+	}
+	return n
+}
+
+// VirtualSizeSum returns the sum of the sizes of the virtual sstables in the
+// level.
+func (ls *LevelSlice) VirtualSizeSum() uint64 {
+	var sum uint64
+	iter := ls.Iter()
+	for f := iter.First(); f != nil; f = iter.Next() {
+		if f.Virtual {
+			sum += f.Size
+		}
+	}
+	return sum
+}
+
 // Reslice constructs a new slice backed by the same underlying level, with
 // new start and end positions. Reslice invokes the provided function, passing
 // two LevelIterators: one positioned to i's inclusive start and one