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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/JsonObjectSerializer.h>
#include <AK/Try.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Kernel/Processes.h>
#include <Kernel/Sections.h>
#include <Kernel/TTY/TTY.h>
#include <Kernel/Tasks/Process.h>
#include <Kernel/Tasks/Scheduler.h>
namespace Kernel {
UNMAP_AFTER_INIT SysFSOverallProcesses::SysFSOverallProcesses(SysFSDirectory const& parent_directory)
: SysFSGlobalInformation(parent_directory)
{
}
UNMAP_AFTER_INIT NonnullRefPtr<SysFSOverallProcesses> SysFSOverallProcesses::must_create(SysFSDirectory const& parent_directory)
{
return adopt_ref_if_nonnull(new (nothrow) SysFSOverallProcesses(parent_directory)).release_nonnull();
}
ErrorOr<void> SysFSOverallProcesses::try_generate(KBufferBuilder& builder)
{
auto json = TRY(JsonObjectSerializer<>::try_create(builder));
// Keep this in sync with CProcessStatistics.
auto build_process = [&](JsonArraySerializer<KBufferBuilder>& array, Process const& process) -> ErrorOr<void> {
auto process_object = TRY(array.add_object());
if (process.is_user_process()) {
StringBuilder pledge_builder;
#define __ENUMERATE_PLEDGE_PROMISE(promise) \
if (process.has_promised(Pledge::promise)) \
TRY(pledge_builder.try_append(#promise " "sv));
ENUMERATE_PLEDGE_PROMISES
#undef __ENUMERATE_PLEDGE_PROMISE
TRY(process_object.add("pledge"sv, pledge_builder.string_view()));
switch (process.veil_state()) {
case VeilState::None:
TRY(process_object.add("veil"sv, "None"));
break;
case VeilState::Dropped:
TRY(process_object.add("veil"sv, "Dropped"));
break;
case VeilState::Locked:
TRY(process_object.add("veil"sv, "Locked"));
break;
case VeilState::LockedInherited:
// Note: We don't reveal if the locked state is either by our choice
// or someone else applied it.
TRY(process_object.add("veil"sv, "Locked"));
break;
}
} else {
TRY(process_object.add("pledge"sv, ""sv));
TRY(process_object.add("veil"sv, ""sv));
}
TRY(process_object.add("pid"sv, process.pid().value()));
ProcessGroupID tty_pgid = 0;
if (auto tty = process.tty())
tty_pgid = tty->pgid();
TRY(process_object.add("pgid"sv, tty_pgid.value()));
TRY(process_object.add("pgp"sv, process.pgid().value()));
TRY(process_object.add("sid"sv, process.sid().value()));
auto credentials = process.credentials();
TRY(process_object.add("uid"sv, credentials->uid().value()));
TRY(process_object.add("gid"sv, credentials->gid().value()));
TRY(process_object.add("ppid"sv, process.ppid().value()));
if (process.tty()) {
auto tty_pseudo_name = TRY(process.tty()->pseudo_name());
TRY(process_object.add("tty"sv, tty_pseudo_name->view()));
} else {
TRY(process_object.add("tty"sv, ""));
}
TRY(process.name().with([&](auto& process_name) { return process_object.add("name"sv, process_name->view()); }));
TRY(process_object.add("executable"sv, process.executable() ? TRY(process.executable()->try_serialize_absolute_path())->view() : ""sv));
size_t amount_virtual = 0;
size_t amount_resident = 0;
size_t amount_dirty_private = 0;
size_t amount_clean_inode = 0;
size_t amount_shared = 0;
size_t amount_purgeable_volatile = 0;
size_t amount_purgeable_nonvolatile = 0;
TRY(process.address_space().with([&](auto& space) -> ErrorOr<void> {
amount_virtual = space->amount_virtual();
amount_resident = space->amount_resident();
amount_dirty_private = space->amount_dirty_private();
amount_clean_inode = TRY(space->amount_clean_inode());
amount_shared = space->amount_shared();
amount_purgeable_volatile = space->amount_purgeable_volatile();
amount_purgeable_nonvolatile = space->amount_purgeable_nonvolatile();
return {};
}));
TRY(process_object.add("amount_virtual"sv, amount_virtual));
TRY(process_object.add("amount_resident"sv, amount_resident));
TRY(process_object.add("amount_dirty_private"sv, amount_dirty_private));
TRY(process_object.add("amount_clean_inode"sv, amount_clean_inode));
TRY(process_object.add("amount_shared"sv, amount_shared));
TRY(process_object.add("amount_purgeable_volatile"sv, amount_purgeable_volatile));
TRY(process_object.add("amount_purgeable_nonvolatile"sv, amount_purgeable_nonvolatile));
TRY(process_object.add("dumpable"sv, process.is_dumpable()));
TRY(process_object.add("kernel"sv, process.is_kernel_process()));
auto thread_array = TRY(process_object.add_array("threads"sv));
TRY(process.try_for_each_thread([&](const Thread& thread) -> ErrorOr<void> {
SpinlockLocker locker(thread.get_lock());
auto thread_object = TRY(thread_array.add_object());
#if LOCK_DEBUG
TRY(thread_object.add("lock_count"sv, thread.lock_count()));
#endif
TRY(thread_object.add("tid"sv, thread.tid().value()));
TRY(thread.name().with([&](auto& thread_name) { return thread_object.add("name"sv, thread_name->view()); }));
TRY(thread_object.add("times_scheduled"sv, thread.times_scheduled()));
TRY(thread_object.add("time_user"sv, thread.time_in_user()));
TRY(thread_object.add("time_kernel"sv, thread.time_in_kernel()));
TRY(thread_object.add("state"sv, thread.state_string()));
TRY(thread_object.add("cpu"sv, thread.cpu()));
TRY(thread_object.add("priority"sv, thread.priority()));
TRY(thread_object.add("syscall_count"sv, thread.syscall_count()));
TRY(thread_object.add("inode_faults"sv, thread.inode_faults()));
TRY(thread_object.add("zero_faults"sv, thread.zero_faults()));
TRY(thread_object.add("cow_faults"sv, thread.cow_faults()));
TRY(thread_object.add("file_read_bytes"sv, thread.file_read_bytes()));
TRY(thread_object.add("file_write_bytes"sv, thread.file_write_bytes()));
TRY(thread_object.add("unix_socket_read_bytes"sv, thread.unix_socket_read_bytes()));
TRY(thread_object.add("unix_socket_write_bytes"sv, thread.unix_socket_write_bytes()));
TRY(thread_object.add("ipv4_socket_read_bytes"sv, thread.ipv4_socket_read_bytes()));
TRY(thread_object.add("ipv4_socket_write_bytes"sv, thread.ipv4_socket_write_bytes()));
TRY(thread_object.finish());
return {};
}));
TRY(thread_array.finish());
TRY(process_object.finish());
return {};
};
{
auto array = TRY(json.add_array("processes"sv));
// FIXME: Do we actually want to expose the colonel process in a Jail environment?
TRY(build_process(array, *Scheduler::colonel()));
TRY(Process::for_each_in_same_jail([&](Process& process) -> ErrorOr<void> {
TRY(build_process(array, process));
return {};
}));
TRY(array.finish());
}
auto total_time_scheduled = Scheduler::get_total_time_scheduled();
TRY(json.add("total_time"sv, total_time_scheduled.total));
TRY(json.add("total_time_kernel"sv, total_time_scheduled.total_kernel));
TRY(json.finish());
return {};
}
}
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