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feat: add vsock network type support (dragonflyoss#1303)
So we support connecting dfdaemon running on host outside of VM via virtio-vsock device. Signed-off-by: Eryu Guan <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /* | ||
| * Copyright 2022 The Dragonfly Authors | ||
| * | ||
| * 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 rpc | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "net" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/mdlayher/vsock" | ||
| "github.com/pkg/errors" | ||
| "google.golang.org/grpc" | ||
|
|
||
| "d7y.io/dragonfly/v2/pkg/dfnet" | ||
| ) | ||
|
|
||
| // VsockDialer is the dialer for vsock, it expects `address` to be in dfnet.NetAddr.GetEndpoint() | ||
| // format, that is "vsock://cid:port" | ||
| func VsockDialer(_ctx context.Context, address string) (net.Conn, error) { | ||
| addrStr := strings.TrimPrefix(address, dfnet.VsockEndpointPrefix) | ||
| addr := strings.Split(addrStr, ":") | ||
| if len(addr) != 2 { | ||
| return nil, fmt.Errorf("invalid vsock address (%s), expected %scid:port", address, dfnet.VsockEndpointPrefix) | ||
| } | ||
|
|
||
| cid, err := strconv.ParseUint(addr[0], 10, 32) | ||
| if err != nil { | ||
| return nil, errors.Wrapf(err, "failed to convert %q to vsock cid", addr[0]) | ||
| } | ||
| port, err := strconv.ParseUint(addr[1], 10, 32) | ||
| if err != nil { | ||
| return nil, errors.Wrapf(err, "failed to convert %q to vsock port", addr[1]) | ||
| } | ||
|
|
||
| conn, err := vsock.Dial(uint32(cid), uint32(port), nil) | ||
| if err != nil { | ||
| return nil, errors.Wrapf(err, "failed to dial vsock %v:%v, address %s", uint32(cid), uint32(port), address) | ||
| } | ||
| return conn, nil | ||
| } | ||
|
|
||
| // If `addrs` are all vsock addresses, add rpc.VsockDialer to DialOption, and return error if addrs | ||
| // have mixed vsock and other connection types. | ||
| func VsockDialerOption(addrs []dfnet.NetAddr, opts []grpc.DialOption) ([]grpc.DialOption, error) { | ||
| var prevType dfnet.NetworkType | ||
| hasVsock := false | ||
| for n, a := range addrs { | ||
| if a.Type != dfnet.VSOCK { | ||
| prevType = a.Type | ||
| continue | ||
| } | ||
| hasVsock = true | ||
| if n > 0 && prevType != dfnet.VSOCK { | ||
| return nil, fmt.Errorf("addrs(%v) have mixed vsock and other types", addrs) | ||
| } | ||
| prevType = a.Type | ||
| } | ||
| dialOpts := opts | ||
| if hasVsock { | ||
| dialOpts = append(opts, grpc.WithContextDialer(VsockDialer)) | ||
| } | ||
| return dialOpts, nil | ||
| } |