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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Singleton.h>
#include <Kernel/JailManagement.h>
#include <Kernel/Process.h>
#include <Kernel/Sections.h>
namespace Kernel {
static Singleton<JailManagement> s_the;
static Atomic<u64> s_jail_id;
UNMAP_AFTER_INIT JailManagement::JailManagement() = default;
JailIndex JailManagement::generate_jail_id()
{
return s_jail_id.fetch_add(1);
}
JailManagement& JailManagement::the()
{
return *s_the;
}
LockRefPtr<Jail> JailManagement::find_jail_by_index(JailIndex index)
{
return m_jails.with([&](auto& list) -> LockRefPtr<Jail> {
for (auto& jail : list) {
if (jail.index() == index)
return jail;
}
return {};
});
}
ErrorOr<void> JailManagement::for_each_in_same_jail(Function<ErrorOr<void>(Jail&)> callback)
{
return Process::current().jail().with([&](auto const& my_jail) -> ErrorOr<void> {
// Note: If we are in a jail, don't reveal anything about the outside world,
// not even the fact that we are in which jail...
if (my_jail)
return {};
return m_jails.with([&](auto& list) -> ErrorOr<void> {
for (auto& jail : list) {
TRY(callback(jail));
}
return {};
});
});
}
LockRefPtr<Jail> JailManagement::find_first_jail_by_name(StringView name)
{
return m_jails.with([&](auto& list) -> LockRefPtr<Jail> {
for (auto& jail : list) {
if (jail.name() == name)
return jail;
}
return {};
});
}
ErrorOr<NonnullLockRefPtr<Jail>> JailManagement::create_jail(NonnullOwnPtr<KString> name)
{
return m_jails.with([&](auto& list) -> ErrorOr<NonnullLockRefPtr<Jail>> {
auto jail = TRY(Jail::create({}, move(name), generate_jail_id()));
list.append(jail);
return jail;
});
}
}
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