partition_id
_user_find_partition(const char *_filename, size_t *neededSize)
{
UserStringParameter<false> filename;
status_t error = filename.Init(_filename, B_PATH_NAME_LENGTH);
if (error != B_OK)
return error;
KDiskDeviceManager *manager = KDiskDeviceManager::Default();
// find the partition
KPartition *partition = manager->RegisterPartition(filename);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar _(partition, true);
partition_id id = partition->ID();
if (neededSize != NULL) {
// get and lock the partition's device
KDiskDevice *device = manager->RegisterDevice(partition->ID(), false);
if (device == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar _2(device, true);
if (DeviceReadLocker locker = device) {
// get the needed size
UserDataWriter writer;
device->WriteUserData(writer);
error = copy_to_user_value(neededSize, writer.AllocatedSize());
if (error != B_OK)
return error;
} else
return B_ERROR;
}
return id;
}
status_t
_user_set_partition_content_parameters(partition_id partitionID,
int32* _changeCounter, const char* _parameters)
{
// copy parameters in
UserStringParameter<true> parameters;
int32 changeCounter;
status_t error
= parameters.Init(_parameters, B_DISK_DEVICE_MAX_PARAMETER_SIZE);
if (error != B_OK || (error = copy_from_user_value(changeCounter,
_changeCounter)) != B_OK) {
return error;
}
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (!partition)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (!diskSystem)
return B_BAD_VALUE;
// mark the partition busy and unlock
if (!partition->CheckAndMarkBusy(true))
return B_BUSY;
locker.Unlock();
// set content parameters
error = diskSystem->SetContentParameters(partition, parameters.value,
DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->UnmarkBusy(true);
if (error != B_OK)
return error;
// return change counter
if ((error = copy_to_user_value(_changeCounter, partition->ChangeCounter()))
!= B_OK) {
return error;
}
return B_OK;
}
status_t
_user_repair_partition(partition_id partitionID, int32* _changeCounter,
bool checkOnly)
{
// copy parameters in
int32 changeCounter;
status_t error;
if ((error = copy_from_user_value(changeCounter, _changeCounter)) != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (!partition)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (!diskSystem)
return B_BAD_VALUE;
// mark the partition busy and unlock
if (!partition->CheckAndMarkBusy(false))
return B_BUSY;
locker.Unlock();
// repair/check
error = diskSystem->Repair(partition, checkOnly, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->UnmarkBusy(false);
if (error != B_OK)
return error;
// return change counter
if ((error = copy_to_user_value(_changeCounter, partition->ChangeCounter()))
!= B_OK) {
return error;
}
return B_OK;
}
status_t
_user_set_partition_content_name(partition_id partitionID,
int32* _changeCounter, const char* _name)
{
// copy parameters in
UserStringParameter<true> name;
int32 changeCounter;
status_t error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH);
if (error == B_OK)
error = copy_from_user_value(changeCounter, _changeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// mark the partition busy and unlock
if (!partition->CheckAndMarkBusy(false))
return B_BUSY;
locker.Unlock();
// set content parameters
error = diskSystem->SetContentName(partition, name.value, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->UnmarkBusy(false);
if (error != B_OK)
return error;
// return change counter
return copy_to_user_value(_changeCounter, partition->ChangeCounter());
}
status_t
_user_move_partition(partition_id partitionID, int32* changeCounter,
partition_id childID, int32* childChangeCounter, off_t newOffset,
partition_id* descendantIDs, int32* descendantChangeCounters,
int32 descendantCount)
{
#if 0
KDiskDeviceManager *manager = KDiskDeviceManager::Default();
// get the partition
KPartition *partition = manager->WriteLockPartition(partitionID);
if (!partition)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// check the new offset
if (newOffset == partition->Offset())
return B_OK;
off_t proposedOffset = newOffset;
status_t error = validate_move_partition(partition, changeCounter,
&proposedOffset, true);
if (error != B_OK)
return error;
if (proposedOffset != newOffset)
return B_BAD_VALUE;
// new offset is fine -- move the thing
off_t moveBy = newOffset - partition->Offset();
move_descendants(partition, moveBy);
partition->Changed(B_PARTITION_CHANGED_OFFSET);
// implicit partitioning system changes
error = partition->Parent()->DiskSystem()->ShadowPartitionChanged(
partition->Parent(), partition, B_PARTITION_MOVE_CHILD);
if (error != B_OK)
return error;
// implicit descendants' content disk system changes
return move_descendants_contents(partition);
#endif
return B_BAD_VALUE;
}
/*! The system was booted from CD - prefer CDs over other entries. If there
is no CD, fall back to the standard mechanism (as implemented by
compare_image_boot().
*/
static int
compare_cd_boot(const void* _a, const void* _b)
{
KPartition* a = *(KPartition**)_a;
KPartition* b = *(KPartition**)_b;
bool aIsCD = a->Type() != NULL
&& !strcmp(a->Type(), kPartitionTypeDataSession);
bool bIsCD = b->Type() != NULL
&& !strcmp(b->Type(), kPartitionTypeDataSession);
int compare = (int)aIsCD - (int)bIsCD;
if (compare != 0)
return compare;
return compare_image_boot(_a, _b);
}
/*! No image was chosen - prefer disks with names like "Antares", or "System"
*/
int
compare_image_boot(const void* _a, const void* _b)
{
KPartition* a = *(KPartition**)_a;
KPartition* b = *(KPartition**)_b;
if (a->ContentName() != NULL) {
if (b->ContentName() == NULL)
return 1;
} else if (b->ContentName() != NULL) {
return -1;
} else
return 0;
int compare = strcmp(a->ContentName(), b->ContentName());
if (!compare)
return 0;
if (!strcasecmp(a->ContentName(), "Antares"))
return 1;
if (!strcasecmp(b->ContentName(), "Antares"))
return -1;
if (!strncmp(a->ContentName(), "System", 6))
return 1;
if (!strncmp(b->ContentName(), "System", 6))
return -1;
return compare;
}
void
vfs_mount_boot_file_system(kernel_args* args)
{
PartitionStack partitions;
status_t status = get_boot_partitions(args, partitions);
if (status < B_OK) {
panic("get_boot_partitions failed!");
}
if (partitions.IsEmpty()) {
panic("did not find any boot partitions!");
}
KPartition* bootPartition;
while (partitions.Pop(&bootPartition)) {
KPath path;
if (bootPartition->GetPath(&path) != B_OK)
panic("could not get boot device!\n");
const char* fsName = NULL;
bool readOnly = false;
if (strcmp(bootPartition->ContentType(), "ISO9660 File System") == 0) {
fsName = "iso9660:write_overlay:attribute_overlay";
readOnly = true;
} else if (bootPartition->IsReadOnly()
&& strcmp(bootPartition->ContentType(), "Be File System") == 0) {
fsName = "bfs:write_overlay";
readOnly = true;
}
TRACE(("trying to mount boot partition: %s\n", path.Path()));
gBootDevice = _kern_mount("/boot", path.Path(), fsName, 0, NULL, 0);
if (gBootDevice >= B_OK) {
gReadOnlyBootDevice = readOnly;
break;
}
}
if (gBootDevice < B_OK)
panic("could not mount boot device!\n");
// create link for the name of the boot device
fs_info info;
if (_kern_read_fs_info(gBootDevice, &info) == B_OK) {
char path[B_FILE_NAME_LENGTH + 1];
snprintf(path, sizeof(path), "/%s", info.volume_name);
_kern_create_symlink(-1, path, "/boot", 0);
}
// Do post-boot-volume module initialization. The module code wants to know
// whether the module images the boot loader has pre-loaded are the same as
// on the boot volume. That is the case when booting from hard disk or CD,
// but not via network.
int32 bootMethodType = args->boot_volume.GetInt32(BOOT_METHOD,
BOOT_METHOD_DEFAULT);
bool bootingFromBootLoaderVolume = bootMethodType == BOOT_METHOD_HARD_DISK
|| bootMethodType == BOOT_METHOD_CD;
module_init_post_boot_device(bootingFromBootLoaderVolume);
file_cache_init_post_boot_device();
// search for other disk systems
KDiskDeviceManager *manager = KDiskDeviceManager::Default();
manager->RescanDiskSystems();
manager->StartMonitoring();
}
status_t
_user_set_partition_parameters(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, const char* _parameters)
{
// copy parameters in
UserStringParameter<true> parameters;
int32 changeCounter;
int32 childChangeCounter;
status_t error
= parameters.Init(_parameters, B_DISK_DEVICE_MAX_PARAMETER_SIZE);
if (error == B_OK)
error = copy_from_user_value(changeCounter, _changeCounter);
if (error == B_OK)
error = copy_from_user_value(childChangeCounter, _childChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// mark the partition busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// set the child parameters
error = diskSystem->SetParameters(child, parameters.value, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (error == B_OK)
error = copy_to_user_value(_childChangeCounter, child->ChangeCounter());
return error;
}
status_t
_user_resize_partition(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, off_t size,
off_t contentSize)
{
// copy parameters in
int32 changeCounter;
int32 childChangeCounter;
status_t error = copy_from_user_value(changeCounter, _changeCounter);
if (error == B_OK)
error = copy_from_user_value(childChangeCounter, _childChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// check sizes
if (size < 0 || contentSize < 0 || size < contentSize
|| size > partition->ContentSize()) {
return B_BAD_VALUE;
}
// mark the partitions busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// resize contents first, if shrinking
if (child->DiskSystem() && contentSize < child->ContentSize())
error = child->DiskSystem()->Resize(child, contentSize, DUMMY_JOB_ID);
// resize the partition
if (error == B_OK && size != child->Size())
error = diskSystem->ResizeChild(child, size, DUMMY_JOB_ID);
// resize contents last, if growing
if (error == B_OK && child->DiskSystem()
&& contentSize > child->ContentSize()) {
error = child->DiskSystem()->Resize(child, contentSize, DUMMY_JOB_ID);
}
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (error == B_OK)
error = copy_to_user_value(_childChangeCounter, child->ChangeCounter());
return error;
}
status_t
_user_delete_child_partition(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32 childChangeCounter)
{
// copy parameters in
int32 changeCounter;
status_t error;
if ((error = copy_from_user_value(changeCounter, _changeCounter)) != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// mark the partition and child busy and unlock
if (partition->IsBusy() || !child->CheckAndMarkBusy(true))
return B_BUSY;
partition->SetBusy(true);
locker.Unlock();
// delete the child
error = diskSystem->DeleteChild(child, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->UnmarkBusy(true);
if (error != B_OK)
return error;
// return change counter
return copy_to_user_value(_changeCounter, partition->ChangeCounter());
}
status_t
_user_create_child_partition(partition_id partitionID, int32* _changeCounter,
off_t offset, off_t size, const char* _type, const char* _name,
const char* _parameters, partition_id* childID, int32* childChangeCounter)
{
// copy parameters in
UserStringParameter<false> type;
UserStringParameter<true> name;
UserStringParameter<true> parameters;
int32 changeCounter;
status_t error = type.Init(_type, B_DISK_DEVICE_TYPE_LENGTH);
if (error == B_OK)
error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH);
if (error == B_OK)
error = parameters.Init(_parameters, B_DISK_DEVICE_MAX_PARAMETER_SIZE);
if (error == B_OK)
error = copy_from_user_value(changeCounter, _changeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// mark the partition busy and unlock
if (!partition->CheckAndMarkBusy(false))
return B_BUSY;
locker.Unlock();
// create the child
KPartition *child = NULL;
error = diskSystem->CreateChild(partition, offset, size, type.value,
name.value, parameters.value, DUMMY_JOB_ID, &child, -1);
// re-lock and unmark busy
locker.Lock();
partition->UnmarkBusy(false);
if (error != B_OK)
return error;
if (child == NULL)
return B_ERROR;
child->UnmarkBusy(true);
// return change counter and child ID
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (error == B_OK)
error = copy_to_user_value(childID, child->ID());
return error;
}
status_t
_user_uninitialize_partition(partition_id partitionID, int32* _changeCounter,
partition_id parentID, int32* _parentChangeCounter)
{
// copy parameters in
int32 changeCounter;
int32 parentChangeCounter;
bool haveParent = parentID >= 0;
status_t error = copy_from_user_value(changeCounter, _changeCounter);
if (haveParent && error == B_OK)
error = copy_from_user_value(parentChangeCounter, _parentChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register parent
KPartition* parent = NULL;
if (haveParent)
parent = manager->RegisterPartition(parentID);
PartitionRegistrar registrar3(parent, true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
if (haveParent && parentChangeCounter != parent->ChangeCounter())
return B_BAD_VALUE;
// the partition must be initialized
if (partition->DiskSystem() == NULL)
return B_BAD_VALUE;
// check busy
if (!partition->CheckAndMarkBusy(true))
return B_BUSY;
if (partition->IsMounted() || partition->IsChildMounted())
return B_BAD_VALUE;
KDiskSystem* diskSystem = partition->DiskSystem();
locker.Unlock();
// Let the disk system uninitialize the partition. This operation is not
// mandatory. If implemented, it will destroy the on-disk structures, so
// that the disk system cannot accidentally identify the partition later on.
if (diskSystem != NULL)
diskSystem->Uninitialize(partition, DUMMY_JOB_ID);
// re-lock and uninitialize the partition object
locker.Lock();
error = partition->UninitializeContents(true);
partition->UnmarkBusy(true);
if (error != B_OK)
return error;
// return change counter
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (haveParent && error == B_OK)
error = copy_to_user_value(_parentChangeCounter, parent->ChangeCounter());
return error;
}
status_t
_user_initialize_partition(partition_id partitionID, int32* _changeCounter,
const char* _diskSystemName, const char* _name, const char* _parameters)
{
// copy parameters in
UserStringParameter<false> diskSystemName;
UserStringParameter<true> name;
UserStringParameter<true> parameters;
int32 changeCounter;
status_t error
= diskSystemName.Init(_diskSystemName, B_DISK_SYSTEM_NAME_LENGTH);
if (error == B_OK)
error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH);
if (error == B_OK)
error = parameters.Init(_parameters, B_DISK_DEVICE_MAX_PARAMETER_SIZE);
if (error == B_OK)
error = copy_from_user_value(changeCounter, _changeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
// the partition must be uninitialized
if (partition->DiskSystem() != NULL)
return B_BAD_VALUE;
// load the new disk system
KDiskSystem *diskSystem = manager->LoadDiskSystem(diskSystemName.value,
true);
if (diskSystem == NULL)
return B_ENTRY_NOT_FOUND;
DiskSystemLoader loader(diskSystem, true);
// mark the partition busy and unlock
if (!partition->CheckAndMarkBusy(true))
return B_BUSY;
locker.Unlock();
// let the disk system initialize the partition
error = diskSystem->Initialize(partition, name.value, parameters.value,
DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->UnmarkBusy(true);
if (error != B_OK)
return error;
// Set the disk system. Re-check whether a disk system is already set on the
// partition. Some disk systems just write the on-disk structures and let
// the DDM rescan the partition, in which case the disk system will already
// be set. In very unfortunate cases the on-disk structure of the previous
// disk system has not been destroyed and the previous disk system has a
// higher priority than the new one. The old disk system will thus prevail.
// Not setting the new disk system will at least prevent that the partition
// object gets into an inconsistent state.
if (partition->DiskSystem() == NULL)
partition->SetDiskSystem(diskSystem);
// return change counter
return copy_to_user_value(_changeCounter, partition->ChangeCounter());
}
status_t
_user_set_partition_name(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, const char* _name)
{
// copy parameters in
UserStringParameter<false> name;
int32 changeCounter;
int32 childChangeCounter;
status_t error;
if ((error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH)) != B_OK
|| (error = copy_from_user_value(changeCounter, _changeCounter))
!= B_OK
|| (error = copy_from_user_value(childChangeCounter,
_childChangeCounter)) != B_OK) {
return error;
}
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (!partition)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (!child)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (!diskSystem)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// mark the partitions busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// set the child name
error = diskSystem->SetName(child, name.value, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
if ((error = copy_to_user_value(_changeCounter, partition->ChangeCounter()))
!= B_OK
|| (error = copy_to_user_value(_childChangeCounter,
child->ChangeCounter())) != B_OK) {
return error;
}
return B_OK;
}