+
+// GetConfirmedReplication returns the replication level of the given
+// blocks, considering only the specified storage classes.
+//
+// If len(classes)==0, returns the replication level without regard to
+// storage classes.
+//
+// Safe to call concurrently with other calls to GetCurrent, but not
+// with different BlockStateMap methods.
+func (bsm *BlockStateMap) GetConfirmedReplication(blkids []arvados.SizedDigest, classes []string) int {
+ defaultClasses := map[string]bool{"default": true}
+ min := 0
+ for _, blkid := range blkids {
+ total := 0
+ perclass := make(map[string]int, len(classes))
+ for _, c := range classes {
+ perclass[c] = 0
+ }
+ bs, ok := bsm.entries[blkid]
+ if !ok {
+ return 0
+ }
+ for _, r := range bs.Replicas {
+ total += r.KeepMount.Replication
+ mntclasses := r.KeepMount.StorageClasses
+ if len(mntclasses) == 0 {
+ mntclasses = defaultClasses
+ }
+ for c := range mntclasses {
+ n, ok := perclass[c]
+ if !ok {
+ // Don't care about this storage class
+ continue
+ }
+ perclass[c] = n + r.KeepMount.Replication
+ }
+ }
+ if total == 0 {
+ return 0
+ }
+ for _, n := range perclass {
+ if n == 0 {
+ return 0
+ }
+ if n < min || min == 0 {
+ min = n
+ }
+ }
+ if len(perclass) == 0 && (min == 0 || min > total) {
+ min = total
+ }
+ }
+ return min
+}