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#include <kernel/filesystem/mount_table.hpp>
#include <kernel/filesystem/dentry.hpp>
#include <kernel/filesystem/mount.hpp>
#include <kstd/memory>
#include <kstd/vector>
#include <algorithm>
#include <ranges>
#include <string_view>
namespace kernel::filesystem
{
auto mount_table::has_child_mounts(kstd::shared_ptr<mount> const & parent_mount) const -> bool
{
return std::ranges::any_of(
m_mounts, [&parent_mount](auto const & mount) { return mount->get_parent_mount() == parent_mount; });
}
void mount_table::add_mount(kstd::shared_ptr<mount> const & mount)
{
m_mounts.push_back(mount);
if (auto mount_dentry = mount->get_mount_dentry())
{
mount_dentry->set_flag(dentry::dentry_flags::is_mount_point);
}
}
auto mount_table::remove_mount(std::string_view path) -> operation_result
{
auto mount_it = find_mount_iterator(path);
if (mount_it == m_mounts.end())
{
return operation_result::mount_not_found;
}
auto const & mount = *mount_it;
if (!mount->is_ready_to_unmount())
{
return operation_result::cannot_be_unmounted;
}
if (has_child_mounts(mount))
{
return operation_result::has_child_mounts;
}
mount->get_mount_dentry()->unset_flag(dentry::dentry_flags::is_mount_point);
m_mounts.erase(mount_it);
return operation_result::removed;
}
auto mount_table::find_mount(std::string_view path) const -> kstd::shared_ptr<mount>
{
auto mount_it = find_mount_iterator(path);
return (mount_it != m_mounts.end()) ? *mount_it : nullptr;
}
auto mount_table::find_mount_iterator(std::string_view path) const
-> kstd::vector<kstd::shared_ptr<mount>>::const_iterator
{
return std::ranges::find_last_if(m_mounts, [&](auto const & mount) { return mount->get_mount_path() == path; })
.begin();
}
} // namespace kernel::filesystem
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