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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/Memory/PrivateInodeVMObject.h>
namespace Kernel::Memory {
ErrorOr<NonnullLockRefPtr<PrivateInodeVMObject>> PrivateInodeVMObject::try_create_with_inode(Inode& inode)
{
if (inode.size() == 0)
return EINVAL;
return try_create_with_inode_and_range(inode, 0, inode.size());
}
ErrorOr<NonnullLockRefPtr<PrivateInodeVMObject>> PrivateInodeVMObject::try_create_with_inode_and_range(Inode& inode, u64 offset, size_t range_size)
{
// Note: To ensure further allocation of a Region with this VMObject will not complain
// on "smaller" VMObject than the requested Region, we simply take the max size between both values.
auto size = max(inode.size(), (offset + range_size));
VERIFY(size > 0);
auto new_physical_pages = TRY(VMObject::try_create_physical_pages(size));
auto dirty_pages = TRY(Bitmap::try_create(new_physical_pages.size(), false));
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) PrivateInodeVMObject(inode, move(new_physical_pages), move(dirty_pages)));
}
ErrorOr<NonnullLockRefPtr<VMObject>> PrivateInodeVMObject::try_clone()
{
auto new_physical_pages = TRY(this->try_clone_physical_pages());
auto dirty_pages = TRY(Bitmap::try_create(new_physical_pages.size(), false));
return adopt_nonnull_lock_ref_or_enomem<VMObject>(new (nothrow) PrivateInodeVMObject(*this, move(new_physical_pages), move(dirty_pages)));
}
PrivateInodeVMObject::PrivateInodeVMObject(Inode& inode, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: InodeVMObject(inode, move(new_physical_pages), move(dirty_pages))
{
}
PrivateInodeVMObject::PrivateInodeVMObject(PrivateInodeVMObject const& other, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, Bitmap dirty_pages)
: InodeVMObject(other, move(new_physical_pages), move(dirty_pages))
{
}
PrivateInodeVMObject::~PrivateInodeVMObject() = default;
}
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