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authorArthur de Kerhor <arthurdekerhor@gmail.com>2021-03-03 08:49:15 -0800
committerDave Barach <openvpp@barachs.net>2021-03-24 12:16:43 +0000
commit1f13f8fd8a5f5f68e6e03825115c64383f17a1b5 (patch)
tree966eb8209ed495c3a544aeaa32f223f5e67214ae /extras/vpp_stats_fs/cmd.go
parent4d2726ece83f391a7cadb1314415ef23104f9ffe (diff)
misc: fuse fs for the stats segment
This extra allows to mount a FUSE filesystem reflecting the state of the stats segment. Type: feature Signed-off-by: Arthur de Kerhor <arthurdekerhor@gmail.com> Change-Id: I692f9ca5a65c1123b3cf28c761455eec36049791
Diffstat (limited to 'extras/vpp_stats_fs/cmd.go')
-rw-r--r--extras/vpp_stats_fs/cmd.go91
1 files changed, 91 insertions, 0 deletions
diff --git a/extras/vpp_stats_fs/cmd.go b/extras/vpp_stats_fs/cmd.go
new file mode 100644
index 00000000000..826b011b00d
--- /dev/null
+++ b/extras/vpp_stats_fs/cmd.go
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2021 Cisco Systems 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.
+ */
+
+/*
+ * Copyright 2016 the Go-FUSE Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+// This file is the main program driver to mount the stats segment filesystem.
+package main
+
+import (
+ "flag"
+ "fmt"
+ "os"
+ "os/signal"
+ "runtime"
+ "strings"
+ "syscall"
+
+ "git.fd.io/govpp.git/adapter/statsclient"
+ "git.fd.io/govpp.git/core"
+ "github.com/hanwen/go-fuse/v2/fs"
+)
+
+func main() {
+ statsSocket := flag.String("socket", statsclient.DefaultSocketName, "Path to VPP stats socket")
+ debug := flag.Bool("debug", false, "print debugging messages.")
+ flag.Parse()
+ if flag.NArg() < 1 {
+ fmt.Fprintf(os.Stderr, "usage: %s MOUNTPOINT\n", os.Args[0])
+ os.Exit(2)
+ }
+ //Conection to the stat segment socket.
+ sc := statsclient.NewStatsClient(*statsSocket)
+ fmt.Printf("Waiting for the VPP socket to be available. Be sure a VPP instance is running.\n")
+ c, err := core.ConnectStats(sc)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Failed to connect to the stats socket: %v\n", err)
+ os.Exit(1)
+ }
+ defer c.Disconnect()
+ fmt.Printf("Connected to the socket\n")
+ //Creating the filesystem instance
+ root, err := NewStatsFileSystem(sc)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "NewStatsFileSystem failed: %v\n", err)
+ os.Exit(1)
+ }
+
+ //Mounting the filesystem.
+ opts := &fs.Options{}
+ opts.Debug = *debug
+ opts.AllowOther = true
+ server, err := fs.Mount(flag.Arg(0), root, opts)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Mount fail: %v\n", err)
+ os.Exit(1)
+ }
+
+ sigs := make(chan os.Signal)
+ signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+
+ fmt.Printf("Successfully mounted the file system in directory: %s\n", flag.Arg(0))
+ runtime.GC()
+
+ for {
+ go server.Wait()
+
+ <-sigs
+ fmt.Println("Unmounting...")
+ err := server.Unmount()
+ if err == nil || !strings.Contains(err.Error(), "Device or resource busy") {
+ break
+ }
+ fmt.Fprintf(os.Stderr, "Unmount fail: %v\n", err)
+ }
+}