* Added file_system_module_info::uninitialize() analogously to

partition_module_info::uninitialize().
* Implemented the hook for BFS.
* Implemented KFileSystem::Uninitialize().

Fixes failure to initialize a BFS initialized device with an intel partition
map.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42142 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/fs_interface.h

@@ -294,6 +294,8 @@ struct file_system_module_info {
 				const char* parameters, disk_job_id job);
 	status_t (*initialize)(int fd, partition_id partition, const char* name,
 				const char* parameters, off_t partitionSize, disk_job_id job);
+	status_t (*uninitialize)(int fd, partition_id partition,
+				off_t partitionSize, uint32 blockSize, disk_job_id job);
 };
 
 

headers/private/fs_shell/fssh_fs_interface.h

@@ -326,6 +326,9 @@ typedef struct fssh_file_system_module_info {
 	fssh_status_t (*initialize)(int fd, fssh_partition_id partition,
 				const char *name, const char *parameters,
 				fssh_off_t partitionSize, fssh_disk_job_id job);
+	fssh_status_t (*uninitialize)(int fd, fssh_partition_id partition,
+				fssh_off_t partitionSize, uint32_t blockSize,
+				fssh_disk_job_id job);
 } fssh_file_system_module_info;
 
 

headers/private/kernel/disk_device_manager/KFileSystem.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2003-2007, Haiku, Inc. All Rights Reserved.
+ * Copyright 2003-2011, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -53,6 +53,8 @@ public:
 	virtual	status_t			Initialize(KPartition* partition,
 									const char* name, const char* parameters,
 									disk_job_id job);
+	virtual	status_t			Uninitialize(KPartition* partition,
+									disk_job_id job);
 
 protected:
 	virtual	status_t			LoadModule();

src/add-ons/kernel/file_systems/bfs/kernel_interface.cpp

@@ -2293,6 +2293,28 @@ bfs_initialize(int fd, partition_id partitionID, const char* name,
 }
 
 
+static status_t
+bfs_uninitialize(int fd, partition_id partitionID, off_t partitionSize,
+	uint32 blockSize, disk_job_id job)
+{
+	if (blockSize == 0)
+		return B_BAD_VALUE;
+
+	update_disk_device_job_progress(job, 0.0);
+
+	// just overwrite the superblock
+	disk_super_block superBlock;
+	memset(&superBlock, 0, sizeof(superBlock));
+
+	if (write_pos(fd, 512, &superBlock, sizeof(superBlock)) < 0)
+		return errno;
+
+	update_disk_device_job_progress(job, 1.0);
+
+	return B_OK;
+}
+
+
 //	#pragma mark -
 
 
@@ -2477,6 +2499,7 @@ static file_system_module_info sBeFileSystem = {
 	NULL,	// set_content_name
 	NULL,	// set_content_parameters
 	bfs_initialize,
+	bfs_uninitialize
 };
 
 module_info* modules[] = {

src/system/kernel/disk_device_manager/KFileSystem.cpp

@@ -1,9 +1,9 @@
 /*
- * Copyright 2003-2008, Haiku, Inc. All Rights Reserved.
+ * Copyright 2003-2011, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
- *		Ingo Weinhold, bonefish@cs.tu-berlin.de
+ *		Ingo Weinhold, ingo_weinhold@gmx.de
  */
 
 #include "KFileSystem.h"
@@ -221,6 +221,31 @@ KFileSystem::Initialize(KPartition* partition, const char* name,
 }
 
 
+status_t
+KFileSystem::Uninitialize(KPartition* partition, disk_job_id job)
+{
+	// check parameters
+	if (partition == NULL || fModule == NULL)
+		return B_BAD_VALUE;
+	if (fModule->uninitialize == NULL)
+		return B_NOT_SUPPORTED;
+
+	// open partition device
+	int fd = -1;
+	status_t result = partition->Open(O_RDWR, &fd);
+	if (result != B_OK)
+		return result;
+
+	// let the module do its job
+	result = fModule->uninitialize(fd, partition->ID(), partition->Size(),
+		partition->BlockSize(), job);
+
+	// cleanup and return
+	close(fd);
+	return result;
+}
+
+
 // LoadModule
 status_t
 KFileSystem::LoadModule()