forked from ligato/vpp-agent
-
Notifications
You must be signed in to change notification settings - Fork 0
/
iface_cache.go
54 lines (45 loc) · 1.85 KB
/
iface_cache.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
// Copyright (c) 2017 Cisco and/or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ifaceidx
import (
"fmt"
"strings"
"github.com/ligato/cn-infra/datasync"
"github.com/ligato/cn-infra/logging/logrus"
"github.com/ligato/vpp-agent/idxvpp/cacheutil"
"github.com/ligato/vpp-agent/idxvpp/nametoidx"
linux_ifaces "github.com/ligato/vpp-agent/plugins/linux/model/interfaces"
)
// Cache the VETH interfaces of a particular agent by watching transport.
// If change appears, it is registered in idx map.
func Cache(watcher datasync.KeyValProtoWatcher) LinuxIfIndex {
resyncName := fmt.Sprintf("linux-iface-cache-%s", watcher)
linuxIfIdx := NewLinuxIfIndex(nametoidx.NewNameToIdx(logrus.DefaultLogger(), resyncName, IndexMetadata))
helper := cacheutil.CacheHelper{
Prefix: linux_ifaces.InterfaceKeyPrefix(),
IDX: linuxIfIdx.GetMapping(),
DataPrototype: &linux_ifaces.LinuxInterfaces_Interface{Name: "linux_iface"},
ParseName: ParseNameFromKey,
}
go helper.DoWatching(resyncName, watcher)
return linuxIfIdx
}
// ParseNameFromKey returns suffix of the key (name).
func ParseNameFromKey(key string) (name string, err error) {
lastSlashPos := strings.LastIndex(key, "/")
if lastSlashPos > 0 && lastSlashPos < len(key)-1 {
return key[lastSlashPos+1:], nil
}
return key, fmt.Errorf("incorrect format of the key %s", key)
}