region: attachnetwork: allow attach by network name

isValidNetworkInfo allows names.  Otherwise the code will panic when
a named was passed and nil was returned by the fetch call

pkg/compute/models/guest_actions.go

@@ -2259,7 +2259,7 @@ func (self *SGuest) PerformAttachnetwork(ctx context.Context, userCred mcclient.
 		if err != nil {
 			return nil, err
 		}
-		if IsExitNetworkInfo(input.Nets[i]) {
+		if IsExitNetworkInfo(userCred, input.Nets[i]) {
 			enicCnt = count
 			// ebw = input.BwLimit
 		} else {

pkg/compute/models/guests.go

@@ -1753,7 +1753,7 @@ func getGuestResourceRequirements(
 	eBw := 0
 	iBw := 0
 	for _, netConfig := range input.Networks {
-		if IsExitNetworkInfo(netConfig) {
+		if IsExitNetworkInfo(userCred, netConfig) {
 			eNicCnt += 1
 			eBw += netConfig.BwLimit
 		} else {

pkg/compute/models/networks.go

@@ -1052,9 +1052,9 @@ func isValidNetworkInfo(userCred mcclient.TokenCredential, netConfig *api.Networ
 	return nil
 }
 
-func IsExitNetworkInfo(netConfig *api.NetworkConfig) bool {
+func IsExitNetworkInfo(userCred mcclient.TokenCredential, netConfig *api.NetworkConfig) bool {
 	if len(netConfig.Network) > 0 {
-		netObj, _ := NetworkManager.FetchById(netConfig.Network)
+		netObj, _ := NetworkManager.FetchByIdOrName(userCred, netConfig.Network)
 		net := netObj.(*SNetwork)
 		if net.IsExitNetwork() {
 			return true

pkg/scheduler/algorithm/predicates/quota_predicate.go

@@ -59,7 +59,7 @@ func fetchGuestUsageFromSchedInfo(s *api.SchedInfo) (computemodels.SQuota, compu
 	iNicCnt := 0
 
 	for _, netConfig := range s.Networks {
-		if computemodels.IsExitNetworkInfo(netConfig) {
+		if computemodels.IsExitNetworkInfo(s.UserCred, netConfig) {
 			eNicCnt += 1
 		} else {
 			iNicCnt += 1