Kernel: Split the ProcFS core file into smaller components

Author: https://github.com/supercomputer7 Commit: 3906dd3aa3 Pull-request: https://github.com/SerenityOS/serenity/pull/15771 Reviewed-by: https://github.com/ADKaster ✅ Reviewed-by: https://github.com/bgianfo
2025-05-03 09:48:47 +00:00 · 2022-10-24 09:41:31 +03:00 · 2022-10-24 09:41:31 +03:00 · 3906dd3aa3 · 2024-07-17 08:59:18 +09:00
commit 3906dd3aa3
parent e882b2ed05
30 changed files with 1080 additions and 822 deletions
--- a/Kernel/FileSystem/ProcFS/ProcessDirectoryInode.cpp
+++ b/Kernel/FileSystem/ProcFS/ProcessDirectoryInode.cpp
@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Spencer Dixon <spencercdixon@gmail.com>
+ * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/FileSystem/ProcFS/ProcessDirectoryInode.h>
+#include <Kernel/FileSystem/ProcFS/ProcessPropertyInode.h>
+#include <Kernel/FileSystem/ProcFS/ProcessSubDirectoryInode.h>
+#include <Kernel/Process.h>
+#include <Kernel/ProcessExposed.h>
+
+namespace Kernel {
+
+ErrorOr<NonnullLockRefPtr<ProcFSProcessDirectoryInode>> ProcFSProcessDirectoryInode::try_create(ProcFS const& procfs, ProcessID pid)
+{
+    return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessDirectoryInode(procfs, pid));
+}
+
+ProcFSProcessDirectoryInode::ProcFSProcessDirectoryInode(ProcFS const& procfs, ProcessID pid)
+    : ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_pid_directory(pid))
+{
+}
+
+ErrorOr<void> ProcFSProcessDirectoryInode::attach(OpenFileDescription&)
+{
+    return {};
+}
+
+InodeMetadata ProcFSProcessDirectoryInode::metadata() const
+{
+    MutexLocker locker(m_inode_lock);
+    auto process = Process::from_pid_in_same_jail(associated_pid());
+    if (!process)
+        return {};
+
+    auto traits = process->procfs_traits();
+    InodeMetadata metadata;
+    metadata.inode = { fsid(), traits->component_index() };
+    metadata.mode = S_IFDIR | traits->required_mode();
+    metadata.uid = traits->owner_user();
+    metadata.gid = traits->owner_group();
+    metadata.size = 0;
+    metadata.mtime = traits->modified_time();
+    return metadata;
+}
+
+ErrorOr<size_t> ProcFSProcessDirectoryInode::read_bytes_locked(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
+{
+    VERIFY_NOT_REACHED();
+}
+
+ErrorOr<void> ProcFSProcessDirectoryInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
+{
+    MutexLocker locker(procfs().m_lock);
+    auto process = Process::from_pid_in_same_jail(associated_pid());
+    if (!process)
+        return EINVAL;
+    return process->procfs_traits()->traverse_as_directory(procfs().fsid(), move(callback));
+}
+
+ErrorOr<NonnullLockRefPtr<Inode>> ProcFSProcessDirectoryInode::lookup(StringView name)
+{
+    MutexLocker locker(procfs().m_lock);
+    auto process = Process::from_pid_in_same_jail(associated_pid());
+    if (!process)
+        return ESRCH;
+    if (name == "fd"sv)
+        return TRY(ProcFSProcessSubDirectoryInode::try_create(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions, associated_pid()));
+    if (name == "stacks"sv)
+        return TRY(ProcFSProcessSubDirectoryInode::try_create(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::Stacks, associated_pid()));
+    if (name == "children"sv)
+        return TRY(ProcFSProcessSubDirectoryInode::try_create(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::Children, associated_pid()));
+    if (name == "unveil"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::Unveil, associated_pid()));
+    if (name == "pledge"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::Pledge, associated_pid()));
+    if (name == "fds"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::OpenFileDescriptions, associated_pid()));
+    if (name == "exe"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::BinaryLink, associated_pid()));
+    if (name == "cwd"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink, associated_pid()));
+    if (name == "perf_events"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::PerformanceEvents, associated_pid()));
+    if (name == "vm"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats, associated_pid()));
+    if (name == "cmdline"sv)
+        return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::CommandLine, associated_pid()));
+    return ENOENT;
+}
+
+}