github.com/kaisenlinux/docker.io@v0.0.0-20230510090727-ea55db55fac7/swarmkit/manager/state/store/networks.go (about)

     1  package store
     2  
     3  import (
     4  	"strings"
     5  
     6  	"github.com/docker/swarmkit/api"
     7  	memdb "github.com/hashicorp/go-memdb"
     8  )
     9  
    10  const tableNetwork = "network"
    11  
    12  func init() {
    13  	register(ObjectStoreConfig{
    14  		Table: &memdb.TableSchema{
    15  			Name: tableNetwork,
    16  			Indexes: map[string]*memdb.IndexSchema{
    17  				indexID: {
    18  					Name:    indexID,
    19  					Unique:  true,
    20  					Indexer: api.NetworkIndexerByID{},
    21  				},
    22  				indexName: {
    23  					Name:    indexName,
    24  					Unique:  true,
    25  					Indexer: api.NetworkIndexerByName{},
    26  				},
    27  				indexCustom: {
    28  					Name:         indexCustom,
    29  					Indexer:      api.NetworkCustomIndexer{},
    30  					AllowMissing: true,
    31  				},
    32  			},
    33  		},
    34  		Save: func(tx ReadTx, snapshot *api.StoreSnapshot) error {
    35  			var err error
    36  			snapshot.Networks, err = FindNetworks(tx, All)
    37  			return err
    38  		},
    39  		Restore: func(tx Tx, snapshot *api.StoreSnapshot) error {
    40  			toStoreObj := make([]api.StoreObject, len(snapshot.Networks))
    41  			for i, x := range snapshot.Networks {
    42  				toStoreObj[i] = x
    43  			}
    44  			return RestoreTable(tx, tableNetwork, toStoreObj)
    45  		},
    46  		ApplyStoreAction: func(tx Tx, sa api.StoreAction) error {
    47  			switch v := sa.Target.(type) {
    48  			case *api.StoreAction_Network:
    49  				obj := v.Network
    50  				switch sa.Action {
    51  				case api.StoreActionKindCreate:
    52  					return CreateNetwork(tx, obj)
    53  				case api.StoreActionKindUpdate:
    54  					return UpdateNetwork(tx, obj)
    55  				case api.StoreActionKindRemove:
    56  					return DeleteNetwork(tx, obj.ID)
    57  				}
    58  			}
    59  			return errUnknownStoreAction
    60  		},
    61  	})
    62  }
    63  
    64  // CreateNetwork adds a new network to the store.
    65  // Returns ErrExist if the ID is already taken.
    66  func CreateNetwork(tx Tx, n *api.Network) error {
    67  	// Ensure the name is not already in use.
    68  	if tx.lookup(tableNetwork, indexName, strings.ToLower(n.Spec.Annotations.Name)) != nil {
    69  		return ErrNameConflict
    70  	}
    71  
    72  	return tx.create(tableNetwork, n)
    73  }
    74  
    75  // UpdateNetwork updates an existing network in the store.
    76  // Returns ErrNotExist if the network doesn't exist.
    77  func UpdateNetwork(tx Tx, n *api.Network) error {
    78  	// Ensure the name is either not in use or already used by this same Network.
    79  	if existing := tx.lookup(tableNetwork, indexName, strings.ToLower(n.Spec.Annotations.Name)); existing != nil {
    80  		if existing.GetID() != n.ID {
    81  			return ErrNameConflict
    82  		}
    83  	}
    84  
    85  	return tx.update(tableNetwork, n)
    86  }
    87  
    88  // DeleteNetwork removes a network from the store.
    89  // Returns ErrNotExist if the network doesn't exist.
    90  func DeleteNetwork(tx Tx, id string) error {
    91  	return tx.delete(tableNetwork, id)
    92  }
    93  
    94  // GetNetwork looks up a network by ID.
    95  // Returns nil if the network doesn't exist.
    96  func GetNetwork(tx ReadTx, id string) *api.Network {
    97  	n := tx.get(tableNetwork, id)
    98  	if n == nil {
    99  		return nil
   100  	}
   101  	return n.(*api.Network)
   102  }
   103  
   104  // FindNetworks selects a set of networks and returns them.
   105  func FindNetworks(tx ReadTx, by By) ([]*api.Network, error) {
   106  	checkType := func(by By) error {
   107  		switch by.(type) {
   108  		case byName, byNamePrefix, byIDPrefix, byCustom, byCustomPrefix, byAll:
   109  			return nil
   110  		default:
   111  			return ErrInvalidFindBy
   112  		}
   113  	}
   114  
   115  	networkList := []*api.Network{}
   116  	appendResult := func(o api.StoreObject) {
   117  		networkList = append(networkList, o.(*api.Network))
   118  	}
   119  
   120  	err := tx.find(tableNetwork, by, checkType, appendResult)
   121  	return networkList, err
   122  }