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d6c3ec864b
When imported, the vc files carried in the 'full style' apache license text, but the standard for kata is to use SPDX style. Update the relevant files to SPDX. Fixes: #227 Signed-off-by: Graham whaley <graham.whaley@intel.com>
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
// Copyright (c) 2017 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package virtcontainers
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import "fmt"
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type bridgeType string
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const (
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pciBridge bridgeType = "pci"
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pcieBridge bridgeType = "pcie"
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)
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const pciBridgeMaxCapacity = 30
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// Bridge is a bridge where devices can be hot plugged
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type Bridge struct {
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// Address contains information about devices plugged and its address in the bridge
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Address map[uint32]string
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// Type is the type of the bridge (pci, pcie, etc)
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Type bridgeType
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//ID is used to identify the bridge in the hypervisor
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ID string
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}
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// addDevice on success adds the device ID to the bridge and return the address
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// where the device was added, otherwise an error is returned
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func (b *Bridge) addDevice(ID string) (uint32, error) {
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var addr uint32
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// looking for the first available address
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for i := uint32(1); i <= pciBridgeMaxCapacity; i++ {
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if _, ok := b.Address[i]; !ok {
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addr = i
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break
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}
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}
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if addr == 0 {
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return 0, fmt.Errorf("Unable to hot plug device on bridge: there are not empty slots")
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}
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// save address and device
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b.Address[addr] = ID
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return addr, nil
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}
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// removeDevice on success removes the device ID from the bridge and return nil,
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// otherwise an error is returned
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func (b *Bridge) removeDevice(ID string) error {
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// check if the device was hot plugged in the bridge
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for addr, devID := range b.Address {
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if devID == ID {
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// free address to re-use the same slot with other devices
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delete(b.Address, addr)
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return nil
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}
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}
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return fmt.Errorf("Unable to hot unplug device %s: not present on bridge", ID)
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}
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