github.com/fafucoder/cilium@v1.6.11/cilium/cmd/map_list.go (about)

     1  // Copyright 2018 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package cmd
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  	"path"
    21  	"text/tabwriter"
    22  
    23  	"github.com/cilium/cilium/api/v1/models"
    24  	"github.com/cilium/cilium/pkg/command"
    25  
    26  	"github.com/spf13/cobra"
    27  )
    28  
    29  // mapListCmd represents the map_list command
    30  var mapListCmd = &cobra.Command{
    31  	Use:     "list",
    32  	Short:   "List all open BPF maps",
    33  	Example: "cilium map list",
    34  	Run: func(cmd *cobra.Command, args []string) {
    35  		resp, err := client.Daemon.GetMap(nil)
    36  		if err != nil {
    37  			Fatalf("%s", err)
    38  		}
    39  
    40  		mapList := resp.Payload
    41  		if mapList == nil {
    42  			return
    43  		}
    44  
    45  		if command.OutputJSON() {
    46  			if err := command.PrintOutput(mapList); err != nil {
    47  				os.Exit(1)
    48  			}
    49  		} else if mapList.Maps != nil {
    50  			if verbose {
    51  				printMapListVerbose(mapList)
    52  			} else {
    53  				printMapList(mapList)
    54  			}
    55  		}
    56  	},
    57  }
    58  
    59  func printMapListVerbose(mapList *models.BPFMapList) {
    60  	for _, m := range mapList.Maps {
    61  		fmt.Printf("## Map: %s\n", path.Base(m.Path))
    62  		printMapEntries(m)
    63  		fmt.Printf("\n")
    64  	}
    65  }
    66  
    67  func printMapList(mapList *models.BPFMapList) {
    68  	w := tabwriter.NewWriter(os.Stdout, 5, 0, 3, ' ', 0)
    69  	fmt.Fprintf(w, "Name\tNum entries\tNum errors\tCache enabled\n")
    70  	for _, m := range mapList.Maps {
    71  		entries, errors := 0, 0
    72  		cacheEnabled := m.Cache != nil
    73  
    74  		for _, e := range m.Cache {
    75  			if e != nil {
    76  				if e.LastError != "" {
    77  					errors++
    78  				}
    79  				entries++
    80  			}
    81  		}
    82  		fmt.Fprintf(w, "%s\t%d\t%d\t%t\n",
    83  			path.Base(m.Path), entries, errors, cacheEnabled)
    84  	}
    85  	w.Flush()
    86  }
    87  
    88  func init() {
    89  	mapCmd.AddCommand(mapListCmd)
    90  	command.AddJSONOutput(mapListCmd)
    91  	mapListCmd.Flags().BoolVar(&verbose, "verbose", false, "Print cache contents of all maps")
    92  }