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manager.go
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manager.go
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package main
import (
"dbus/org/freedesktop/udisks2"
"path"
"pkg.deepin.io/lib/dbus"
"strings"
"sync"
)
const (
udiskDBusDest = "org.freedesktop.UDisks2"
)
// Manager cd helper
type Manager struct {
objManager *udisks2.ObjectManager
srBlocks []*udisks2.Block
srLocker sync.Mutex
List CDInfos
Added func(CDInfo)
Removed func(CDInfo)
}
func newManager() *Manager {
var m = new(Manager)
m.objManager, _ = udisks2.NewObjectManager(udiskDBusDest, "/org/freedesktop/UDisks2")
m.init()
return m
}
func (m *Manager) init() {
srPaths := m.getSrPaths()
logger.Info("Sr list:", srPaths)
for _, p := range srPaths {
m.addBlockMonitor(p)
info := newCDInfo(p)
if info == nil {
continue
}
logger.Debug("Add sr info:", info)
m.List = m.List.Add(info)
}
m.objManager.ConnectInterfacesAdded(func(p dbus.ObjectPath, detail map[string]map[string]dbus.Variant) {
if !strings.Contains(string(p), "/org/freedesktop/UDisks2/Block/sr") {
return
}
m.addBlockMonitor(p)
info := newCDInfo(p)
if info == nil {
return
}
logger.Debug("Add sr info:", info)
m.List = m.List.Add(info)
dbus.Emit(m, "Added", *info)
})
m.objManager.ConnectInterfacesRemoved(func(p dbus.ObjectPath, ifcs []string) {
if !strings.Contains(string(p), "/org/freedesktop/UDisks2/Block/sr") {
return
}
m.removeBlock(p)
id := "/dev/" + path.Base(string(p))
info := m.List.Get(id)
if info == nil {
return
}
logger.Debug("Remove sr info:", info)
m.List = m.List.Remove(id)
dbus.Emit(m, "Removed", *info)
})
}
func (m *Manager) addBlockMonitor(blockPath dbus.ObjectPath) {
block, _ := udisks2.NewBlock(udiskDBusDest, blockPath)
logger.Debug("[addBlockmonitor] info:", blockPath, block.Size.Get(), block.Id.Get())
block.Size.ConnectChanged(func() {
logger.Debug("Block size changed:", block.Path, block.Size.Get())
if block.Size.Get() != 0 {
if block.Id.Get() != "" {
return
}
info := newCDInfo(blockPath)
if info == nil {
return
}
logger.Debug("Add sr info:", info)
m.List = m.List.Add(info)
dbus.Emit(m, "Added", *info)
} else {
// remove
id := "/dev/" + path.Base(string(blockPath))
info := m.List.Get(id)
if info == nil {
return
}
logger.Debug("Remove sr info:", info)
m.List = m.List.Remove(id)
dbus.Emit(m, "Removed", *info)
}
})
m.addSrBlock(block)
}
func (m *Manager) getSrPaths() []dbus.ObjectPath {
objs, err := m.objManager.GetManagedObjects()
if err != nil {
logger.Warning("Failed to get manager objects:", err)
return nil
}
var srPaths []dbus.ObjectPath
for p, v := range objs {
_, ok := v["org.freedesktop.UDisks2.Block"]
if !ok {
continue
}
logger.Info("Block obj:", p)
if !strings.Contains(string(p), "/org/freedesktop/UDisks2/block_devices/sr") {
continue
}
srPaths = append(srPaths, p)
}
return srPaths
}
func (m *Manager) addSrBlock(block *udisks2.Block) {
m.srLocker.Lock()
defer m.srLocker.Unlock()
for _, b := range m.srBlocks {
if b.Path == block.Path {
return
}
}
m.srBlocks = append(m.srBlocks, block)
}
func (m *Manager) removeBlock(blockPath dbus.ObjectPath) {
m.srLocker.Lock()
defer m.srLocker.Unlock()
var blocks []*udisks2.Block
for _, b := range m.srBlocks {
if b.Path == blockPath {
udisks2.DestroyBlock(b)
continue
}
blocks = append(blocks, b)
}
m.srBlocks = blocks
}
func (*Manager) GetDBusInfo() dbus.DBusInfo {
return dbus.DBusInfo{
Dest: dbusDest,
ObjectPath: dbusPath,
Interface: dbusIFC,
}
}