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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/FileSystem/SysFS.h>
#include <Kernel/FileSystem/SysFSComponent.h>
namespace Kernel {
static Spinlock<u8> s_index_lock;
static InodeIndex s_next_inode_index { 0 };
static size_t allocate_inode_index()
{
SpinlockLocker lock(s_index_lock);
s_next_inode_index = s_next_inode_index.value() + 1;
VERIFY(s_next_inode_index > 0);
return s_next_inode_index.value();
}
SysFSComponent::SysFSComponent(StringView name)
: m_name(KString::try_create(name).release_nonnull())
, m_component_index(allocate_inode_index())
{
}
KResult SysFSDirectory::traverse_as_directory(unsigned fsid, Function<bool(FileSystem::DirectoryEntryView const&)> callback) const
{
MutexLocker locker(SysFSComponentRegistry::the().get_lock());
VERIFY(m_parent_directory);
callback({ ".", { fsid, component_index() }, 0 });
callback({ "..", { fsid, m_parent_directory->component_index() }, 0 });
for (auto& component : m_components) {
InodeIdentifier identifier = { fsid, component.component_index() };
callback({ component.name(), identifier, 0 });
}
return KSuccess;
}
RefPtr<SysFSComponent> SysFSDirectory::lookup(StringView name)
{
for (auto& component : m_components) {
if (component.name() == name) {
return component;
}
}
return {};
}
SysFSDirectory::SysFSDirectory(StringView name)
: SysFSComponent(name)
{
}
SysFSDirectory::SysFSDirectory(StringView name, SysFSDirectory const& parent_directory)
: SysFSComponent(name)
, m_parent_directory(parent_directory)
{
}
NonnullRefPtr<Inode> SysFSDirectory::to_inode(SysFS const& sysfs_instance) const
{
return SysFSDirectoryInode::create(sysfs_instance, *this);
}
NonnullRefPtr<Inode> SysFSComponent::to_inode(SysFS const& sysfs_instance) const
{
return SysFSInode::create(sysfs_instance, *this);
}
}
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