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* KDiskDeviceManager::RescanDiskSystems() now also rescans all partitions with 

the newly found disk systems.
* _ScanPartition() now allows to restrict the disk systems to a predefined set.
* _ScanPartition() now even scans partitions that already have a disk system
  assigned; if a better one is found, the existing one is replaced. It will
  ignore mounted or partitions with children, though.
* KPartition now also stores the priority of the disk system assigned to it.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26177 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2008-06-30 10:36:47 +00:00
parent 781420cc0e
commit 8531599a27
4 changed files with 91 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
headers/private/kernel/disk_device_manager/KDiskDeviceManager.h
View File

@ -98,10 +98,16 @@ public:
status_t StartMonitoring();
private:
struct DeviceMap;
struct DiskSystemMap;
struct PartitionMap;
struct PartitionSet;
class DeviceWatcher;
static status_t _CheckMediaStatusDaemon(void* self);
status_t _CheckMediaStatus();
status_t _RescanDiskSystems(bool fileSystems);
status_t _RescanDiskSystems(DiskSystemMap& addedSystems, bool fileSystems);
status_t _AddPartitioningSystem(const char *name);
status_t _AddFileSystem(const char *name);
@ -111,19 +117,14 @@ private:
bool _RemoveDevice(KDiskDevice *device);
status_t _Scan(const char *path);
status_t _ScanPartition(KPartition *partition, bool async);
status_t _ScanPartition(KPartition *partition, bool async,
DiskSystemMap* restrictScan = NULL);
// the manager must be locked and the device write locked
status_t _ScanPartition(KPartition *partition);
// used by the other _ScanPartition() version only
status_t _ScanPartition(KPartition *partition,
DiskSystemMap* restrictScan);
status_t _AddRemoveMonitoring(const char *path, bool add);
struct DeviceMap;
struct DiskSystemMap;
struct PartitionMap;
struct PartitionSet;
class DeviceWatcher;
BLocker fLock;
DeviceMap *fDevices;
PartitionMap *fPartitions;

4
headers/private/kernel/disk_device_manager/KPartition.h
View File

@ -148,8 +148,9 @@ public:
// DiskSystem
void SetDiskSystem(KDiskSystem *diskSystem);
void SetDiskSystem(KDiskSystem *diskSystem, float priority = 0.0f);
KDiskSystem *DiskSystem() const;
float DiskSystemPriority() const;
KDiskSystem *ParentDiskSystem() const;
// When setting a disk system, it must already be loaded.
// The partition will load it too, hence it won't be unloaded before
@ -218,6 +219,7 @@ protected:
KDiskDevice *fDevice;
KPartition *fParent;
KDiskSystem *fDiskSystem;
float fDiskSystemPriority;
ListenerSet *fListeners;
uint32 fChangeFlags;
int32 fChangeCounter;

85
src/system/kernel/disk_device_manager/KDiskDeviceManager.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright 2004-2007, Haiku, Inc. All rights reserved.
* Copyright 2004-2008, Haiku, Inc. All rights reserved.
* Copyright 2003-2004, Ingo Weinhold, bonefish@cs.tu-berlin.de. All rights reserved.
*
* Distributed under the terms of the MIT License.
@ -159,14 +159,6 @@ class KDiskDeviceManager::DeviceWatcher : public NotificationListener {
};
static bool
is_active_job_status(uint32 status)
{
return (status == B_DISK_DEVICE_JOB_SCHEDULED
|| status == B_DISK_DEVICE_JOB_IN_PROGRESS);
}
// #pragma mark -
@ -919,9 +911,9 @@ KDiskDeviceManager::StartMonitoring()
}
// _RescanDiskSystems
status_t
KDiskDeviceManager::_RescanDiskSystems(bool fileSystems)
KDiskDeviceManager::_RescanDiskSystems(DiskSystemMap& addedSystems,
bool fileSystems)
{
void *cookie = open_module_list(fileSystems
? kFileSystemPrefix : kPartitioningSystemPrefix);
@ -949,19 +941,43 @@ KDiskDeviceManager::_RescanDiskSystems(bool fileSystems)
DBG(OUT("partitioning system: %s\n", name.Path()));
_AddPartitioningSystem(name.Path());
}
if (KDiskSystem* system = FindDiskSystem(name.Path()))
addedSystems.Put(system->ID(), system);
}
close_module_list(cookie);
return B_OK;
}
// RescanDiskSystems
/*! Rescan the existing disk systems. This is called after the boot device
has become available.
*/
status_t
KDiskDeviceManager::RescanDiskSystems()
{
DiskSystemMap addedSystems;
// rescan for partitioning and file systems
_RescanDiskSystems(false);
_RescanDiskSystems(true);
_RescanDiskSystems(addedSystems, false);
_RescanDiskSystems(addedSystems, true);
// rescan existing devices with the new disk systems
int32 cookie = 0;
while (KDiskDevice *device = RegisterNextDevice(&cookie)) {
PartitionRegistrar _(device, true);
if (DeviceWriteLocker deviceLocker = device) {
if (ManagerLocker locker = this) {
status_t status = _ScanPartition(device, false, &addedSystems);
device->UnmarkBusy(true);
if (status != B_OK)
break;
} else
return B_ERROR;
} else
return B_ERROR;
}
return B_OK;
}
@ -1158,7 +1174,8 @@ DBG(OUT(" found device: %s\n", path));
The device must be write locked, the manager must be locked.
*/
status_t
KDiskDeviceManager::_ScanPartition(KPartition *partition, bool async)
KDiskDeviceManager::_ScanPartition(KPartition *partition, bool async,
DiskSystemMap* restrictScan)
{
// TODO: There's no reason why the manager needs to be locked anymore.
if (!partition)
@ -1197,22 +1214,26 @@ KDiskDeviceManager::_ScanPartition(KPartition *partition, bool async)
// scan synchronously
return _ScanPartition(partition);
return _ScanPartition(partition, restrictScan);
}
status_t
KDiskDeviceManager::_ScanPartition(KPartition *partition)
KDiskDeviceManager::_ScanPartition(KPartition* partition,
DiskSystemMap* restrictScan)
{
// the partition's device must be write-locked
if (!partition)
if (partition == NULL)
return B_BAD_VALUE;
if (!partition->Device()->HasMedia())
if (!partition->Device()->HasMedia() || partition->IsMounted())
return B_OK;
if (partition->DiskSystem() != NULL) {
// TODO: this is more or less a hack to allow rescanning a partition
for (int32 i = 0; KPartition *child = partition->ChildAt(i); i++)
_ScanPartition(child);
if (partition->CountChildren() > 0) {
// Since this partition has already children, we don't scan it
// again, but only its children.
for (int32 i = 0; KPartition* child = partition->ChildAt(i); i++) {
_ScanPartition(child, restrictScan);
}
return B_OK;
}
@ -1230,12 +1251,20 @@ KDiskDeviceManager::_ScanPartition(KPartition *partition)
return error;
}
DiskSystemMap* diskSystems = restrictScan;
if (diskSystems == NULL)
diskSystems = fDiskSystems;
// find the disk system that returns the best priority for this partition
float bestPriority = -1;
float bestPriority = partition->DiskSystemPriority();
KDiskSystem *bestDiskSystem = NULL;
void *bestCookie = NULL;
int32 itCookie = 0;
while (KDiskSystem *diskSystem = LoadNextDiskSystem(&itCookie)) {
for (DiskSystemMap::Iterator iterator = diskSystems->Begin();
iterator != diskSystems->End(); iterator++) {
KDiskSystem* diskSystem = iterator->Value();
if (diskSystem->Load() != B_OK)
continue;
DBG(OUT(" trying: %s\n", diskSystem->Name()));
void *cookie = NULL;
@ -1267,9 +1296,9 @@ KDiskDeviceManager::_ScanPartition(KPartition *partition)
error = bestDiskSystem->Scan(partition, bestCookie);
bestDiskSystem->FreeIdentifyCookie(partition, bestCookie);
if (error == B_OK) {
partition->SetDiskSystem(bestDiskSystem);
partition->SetDiskSystem(bestDiskSystem, bestPriority);
for (int32 i = 0; KPartition *child = partition->ChildAt(i); i++)
_ScanPartition(child);
_ScanPartition(child, restrictScan);
} else {
// TODO: Handle the error.
DBG(OUT(" scanning failed: %s\n", strerror(error)));

23
src/system/kernel/disk_device_manager/KPartition.cpp
View File

@ -1,4 +1,10 @@
// KPartition.cpp
/*
* Copyright 2004-2008, Haiku, Inc. All rights reserved.
* Copyright 2003-2004, Ingo Weinhold, bonefish@cs.tu-berlin.de. All rights reserved.
*
* Distributed under the terms of the MIT License.
*/
#include <errno.h>
#include <fcntl.h>
@ -44,6 +50,7 @@ KPartition::KPartition(partition_id id)
fDevice(NULL),
fParent(NULL),
fDiskSystem(NULL),
fDiskSystemPriority(-1),
fListeners(NULL),
fChangeFlags(0),
fChangeCounter(0),
@ -52,7 +59,7 @@ KPartition::KPartition(partition_id id)
fObsolete(false),
fPublished(false)
{
fPartitionData.id = (id >= 0 ? id : _NextID());
fPartitionData.id = id >= 0 ? id : _NextID();
fPartitionData.offset = 0;
fPartitionData.size = 0;
fPartitionData.content_size = 0;
@ -895,13 +902,14 @@ KPartition::VisitEachDescendant(KPartitionVisitor *visitor)
// SetDiskSystem
void
KPartition::SetDiskSystem(KDiskSystem *diskSystem)
KPartition::SetDiskSystem(KDiskSystem *diskSystem, float priority)
{
// unload former disk system
if (fDiskSystem) {
fPartitionData.content_type = NULL;
fDiskSystem->Unload();
fDiskSystem = NULL;
fDiskSystemPriority = -1;
}
// set and load new one
fDiskSystem = diskSystem;
@ -910,6 +918,7 @@ KPartition::SetDiskSystem(KDiskSystem *diskSystem)
// update concerned partition flags
if (fDiskSystem) {
fPartitionData.content_type = fDiskSystem->PrettyName();
fDiskSystemPriority = priority;
if (fDiskSystem->IsFileSystem())
AddFlags(B_PARTITION_FILE_SYSTEM);
else
@ -926,6 +935,14 @@ KPartition::DiskSystem() const
return fDiskSystem;
}
float
KPartition::DiskSystemPriority() const
{
return fDiskSystemPriority;
}
// ParentDiskSystem
KDiskSystem *
KPartition::ParentDiskSystem() const