// _UnregisterFileSystem
status_t
UserlandFS::_UnregisterFileSystem(const char* name)
{
if (!name)
return B_BAD_VALUE;
// find the FS and decrement its reference counter
FileSystemInitializer* fileSystemInitializer = NULL;
bool deleteFS = false;
{
FileSystemLocker _(fFileSystems);
fileSystemInitializer = fFileSystems->Get(name);
if (!fileSystemInitializer)
return B_BAD_VALUE;
deleteFS = fileSystemInitializer->RemoveReference();
if (deleteFS)
fFileSystems->Remove(name);
}
// delete the FS, if the last reference has been removed
if (deleteFS)
delete fileSystemInitializer;
return B_OK;
}
// RegisterFileSystem
status_t
UserlandFS::RegisterFileSystem(const char* name, FileSystem** _fileSystem)
{
// check parameters
if (!name || !_fileSystem)
return B_BAD_VALUE;
// check, if we do already know this file system, and create it, if not
FileSystemInitializer* fileSystemInitializer;
{
FileSystemLocker _(fFileSystems);
fileSystemInitializer = fFileSystems->Get(name);
if (fileSystemInitializer) {
fileSystemInitializer->AddReference();
} else {
fileSystemInitializer = new(nothrow) FileSystemInitializer(name);
if (!fileSystemInitializer)
return B_NO_MEMORY;
status_t error = fFileSystems->Put(name, fileSystemInitializer);
if (error != B_OK) {
delete fileSystemInitializer;
return error;
}
}
}
// prepare the file system
status_t error = fileSystemInitializer->Access();
if (error != B_OK) {
_UnregisterFileSystem(name);
return error;
}
*_fileSystem = fileSystemInitializer->GetFileSystem();
return error;
}
// DebugUFS
int
KernelDebug::DebugUFS(int argc, char** argv)
{
typedef HashMap<String, FileSystemInitializer*> KDebugFSMap;
UserlandFS* userlandFS = UserlandFS::GetUserlandFS();
KDebugFSMap& fileSystems = userlandFS->fFileSystems->GetUnsynchronizedMap();
for (KDebugFSMap::Iterator it = fileSystems.GetIterator();
it.HasNext();) {
KDebugFSMap::Entry entry = it.Next();
FileSystemInitializer* fsInitializer = entry.value;
FileSystem* fs = fsInitializer->GetFileSystem();
kprintf("file system %p: %s\n", fs, (fs ? fs->GetName() : NULL));
if (fs) {
kprintf(" port pool %p\n", fs->GetPortPool());
int32 volumeCount = fs->fVolumes.Count();
for (int32 i = 0; i < volumeCount; i++) {
Volume* volume = fs->fVolumes.ElementAt(i);
kprintf(" volume %p: %ld\n", volume, volume->GetID());
}
}
}
return 0;
}
