func (a *Allocator) initializeAddressSpace(as string, ds datastore.DataStore) error {
scope := ""
if ds != nil {
scope = ds.Scope()
}
a.Lock()
if currAS, ok := a.addrSpaces[as]; ok {
if currAS.ds != nil {
a.Unlock()
return types.ForbiddenErrorf("a datastore is already configured for the address space %s", as)
}
}
a.addrSpaces[as] = &addrSpace{
subnets: map[SubnetKey]*PoolData{},
id: dsConfigKey + "/" + as,
scope: scope,
ds: ds,
alloc: a,
}
a.Unlock()
a.checkConsistency(as)
return nil
}
func ensureKeys(key string, cs datastore.DataStore) error {
exists, err := cs.KVStore().Exists(key)
if err != nil {
return err
}
if exists {
return nil
}
return cs.KVStore().Put(key, []byte{}, nil)
}
func (c *controller) getNetworksFromStore(global bool) ([]*store.KVPair, error) {
var cs datastore.DataStore
c.Lock()
if global {
cs = c.globalStore
} else {
cs = c.localStore
}
c.Unlock()
return cs.KVStore().List(datastore.Key(datastore.NetworkKeyPrefix))
}
func (a *Allocator) initializeAddressSpace(as string, ds datastore.DataStore) error {
a.Lock()
if _, ok := a.addrSpaces[as]; ok {
a.Unlock()
return types.ForbiddenErrorf("tried to add an axisting address space: %s", as)
}
a.addrSpaces[as] = &addrSpace{
subnets: map[SubnetKey]*PoolData{},
id: dsConfigKey + "/" + as,
scope: ds.Scope(),
ds: ds,
alloc: a,
}
a.Unlock()
a.checkConsistency(as)
return nil
}
// set/reset the bit
func (h *Handle) set(ordinal, start, end uint64, any bool, release bool) (uint64, error) {
var (
bitPos uint64
bytePos uint64
ret uint64
err error
)
for {
var store datastore.DataStore
h.Lock()
store = h.store
h.Unlock()
if store != nil {
if err := store.GetObject(datastore.Key(h.Key()...), h); err != nil && err != datastore.ErrKeyNotFound {
return ret, err
}
}
h.Lock()
// Get position if available
if release {
bytePos, bitPos = ordinalToPos(ordinal)
} else {
if any {
bytePos, bitPos, err = getFirstAvailable(h.head, start)
ret = posToOrdinal(bytePos, bitPos)
if end < ret {
err = ErrNoBitAvailable
}
} else {
bytePos, bitPos, err = checkIfAvailable(h.head, ordinal)
ret = ordinal
}
}
if err != nil {
h.Unlock()
return ret, err
}
// Create a private copy of h and work on it
nh := h.getCopy()
h.Unlock()
nh.head = pushReservation(bytePos, bitPos, nh.head, release)
if release {
nh.unselected++
} else {
nh.unselected--
}
// Attempt to write private copy to store
if err := nh.writeToStore(); err != nil {
if _, ok := err.(types.RetryError); !ok {
return ret, fmt.Errorf("internal failure while setting the bit: %v", err)
}
// Retry
continue
}
// Previous atomic push was succesfull. Save private copy to local copy
h.Lock()
defer h.Unlock()
h.unselected = nh.unselected
h.head = nh.head
h.dbExists = nh.dbExists
h.dbIndex = nh.dbIndex
return ret, nil
}
}