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Kernel/FileSystem: Simplify the ProcFS significantly
Since the ProcFS doesn't hold many global objects within it, the need for a fully-structured design of backing components and a registry like with the SysFS is no longer true. To acommodate this, let's remove all backing store and components of the ProcFS, so now it resembles what we had in the early days of ProcFS in the project - a mostly-static filesystem, with very small amount of kmalloc allocations needed. We still use the inode index mechanism to understand the role of each inode, but this is done in a much "static"ier way than before.
This commit is contained in:
Liav A
Linus Groh
parent
9216caeec2
commit
c56e1c5378
18 changed files with 362 additions and 952 deletions
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@ -1,33 +0,0 @@
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/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Spencer Dixon <spencercdixon@gmail.com>
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Singleton.h>
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#include <Kernel/ProcessExposed.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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static Singleton<ProcFSComponentRegistry> s_the;
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ProcFSComponentRegistry& ProcFSComponentRegistry::the()
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{
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return *s_the;
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}
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UNMAP_AFTER_INIT void ProcFSComponentRegistry::initialize()
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{
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VERIFY(!s_the.is_initialized());
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s_the.ensure_instance();
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}
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UNMAP_AFTER_INIT ProcFSComponentRegistry::ProcFSComponentRegistry()
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: m_root_directory(ProcFSRootDirectory::must_create())
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{
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}
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}
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64
Kernel/FileSystem/ProcFS/Definitions.h
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64
Kernel/FileSystem/ProcFS/Definitions.h
Normal file
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@ -0,0 +1,64 @@
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/*
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* Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/StringView.h>
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#include <AK/Types.h>
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namespace Kernel {
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struct segmented_global_inode_index {
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StringView name;
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u8 file_type;
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u32 primary;
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u16 subdirectory;
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u32 property;
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};
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constexpr segmented_global_inode_index global_inode_ids[] = {
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{ "."sv, DT_DIR, 0, 0, 1 }, // NOTE: This is here for the root directory
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{ "self"sv, DT_DIR, 0, 0, 2 }
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};
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struct segmented_process_directory_entry {
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StringView name;
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u8 file_type;
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u16 subdirectory;
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u32 property;
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};
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constexpr segmented_process_directory_entry main_process_directory_root_entry = { "."sv, DT_DIR, 0, 0 };
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constexpr segmented_process_directory_entry process_fd_subdirectory_root_entry = { "."sv, DT_DIR, 1, 0 };
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constexpr segmented_process_directory_entry process_stacks_subdirectory_root_entry = { "."sv, DT_DIR, 2, 0 };
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constexpr segmented_process_directory_entry process_children_subdirectory_root_entry = { "."sv, DT_DIR, 3, 0 };
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constexpr segmented_process_directory_entry process_fd_directory_entry = { "fd"sv, DT_DIR, 1, 0 };
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constexpr segmented_process_directory_entry process_stacks_directory_entry = { "stacks"sv, DT_DIR, 2, 0 };
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constexpr segmented_process_directory_entry process_children_directory_entry = { "children"sv, DT_DIR, 3, 0 };
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constexpr segmented_process_directory_entry process_unveil_list_entry = { "unveil"sv, DT_REG, 0, 1 };
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constexpr segmented_process_directory_entry process_pledge_list_entry = { "pledge"sv, DT_REG, 0, 2 };
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constexpr segmented_process_directory_entry process_fds_list_entry = { "fds"sv, DT_REG, 0, 3 };
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constexpr segmented_process_directory_entry process_exe_symlink_entry = { "exe"sv, DT_LNK, 0, 4 };
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constexpr segmented_process_directory_entry process_cwd_symlink_entry = { "cwd"sv, DT_LNK, 0, 5 };
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constexpr segmented_process_directory_entry process_perf_events_entry = { "perf_events"sv, DT_REG, 0, 6 };
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constexpr segmented_process_directory_entry process_vm_entry = { "vm"sv, DT_REG, 0, 7 };
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constexpr segmented_process_directory_entry process_cmdline_entry = { "cmdline"sv, DT_REG, 0, 8 };
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constexpr segmented_process_directory_entry main_process_directory_entries[] = {
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process_fd_directory_entry,
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process_stacks_directory_entry,
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process_children_directory_entry,
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process_unveil_list_entry,
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process_pledge_list_entry,
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process_fds_list_entry,
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process_exe_symlink_entry,
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process_cwd_symlink_entry,
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process_perf_events_entry,
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process_vm_entry,
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process_cmdline_entry,
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};
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}
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@ -8,7 +8,6 @@
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#include <Kernel/FileSystem/ProcFS/FileSystem.h>
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#include <Kernel/FileSystem/ProcFS/Inode.h>
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#include <Kernel/ProcessExposed.h>
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namespace Kernel {
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@ -20,9 +19,16 @@ ErrorOr<NonnullLockRefPtr<FileSystem>> ProcFS::try_create()
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ProcFS::ProcFS() = default;
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ProcFS::~ProcFS() = default;
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ErrorOr<NonnullLockRefPtr<Inode>> ProcFS::get_inode(InodeIdentifier inode_id) const
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{
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if (inode_id.index() == 1)
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return *m_root_inode;
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return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(const_cast<ProcFS&>(*this), inode_id.index())));
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}
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ErrorOr<void> ProcFS::initialize()
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{
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m_root_inode = TRY(ProcFSComponentRegistry::the().root_directory().to_inode(*this));
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m_root_inode = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(const_cast<ProcFS&>(*this), 1)));
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return {};
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}
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@ -16,6 +16,7 @@ namespace Kernel {
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class ProcFSInode;
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class ProcFS final : public FileSystem {
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friend class ProcFSInode;
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friend class Process;
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public:
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virtual ~ProcFS() override;
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@ -29,6 +30,8 @@ public:
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private:
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ProcFS();
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ErrorOr<NonnullLockRefPtr<Inode>> get_inode(InodeIdentifier) const;
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LockRefPtr<ProcFSInode> m_root_inode;
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};
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@ -1,189 +1,125 @@
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/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Spencer Dixon <spencercdixon@gmail.com>
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* Copyright (c) 2021-2022, Liav A. <liavalb@hotmail.co.il>
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* Copyright (c) 2021-2023, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/ProcFS/Inode.h>
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#include <Kernel/Process.h>
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#include <Kernel/ProcessExposed.h>
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#include <Kernel/Time/TimeManagement.h>
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namespace Kernel {
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ProcFSInode::~ProcFSInode() = default;
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ErrorOr<void> ProcFSInode::flush_metadata()
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static mode_t determine_procfs_process_inode_mode(u32 subdirectory, u32 property)
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{
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return {};
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}
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ErrorOr<void> ProcFSInode::add_child(Inode&, StringView, mode_t)
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{
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return EROFS;
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}
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ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::create_child(StringView, mode_t, dev_t, UserID, GroupID)
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{
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return EROFS;
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}
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ErrorOr<void> ProcFSInode::remove_child(StringView)
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{
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return EROFS;
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}
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ErrorOr<void> ProcFSInode::chmod(mode_t)
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{
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return EPERM;
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}
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ErrorOr<void> ProcFSInode::chown(UserID, GroupID)
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{
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return EPERM;
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}
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ErrorOr<void> ProcFSInode::replace_child(StringView, Inode&)
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{
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return EROFS;
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}
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ErrorOr<size_t> ProcFSInode::write_bytes_locked(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*)
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{
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return EROFS;
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}
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ErrorOr<void> ProcFSInode::truncate(u64)
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{
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return EROFS;
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}
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ErrorOr<void> ProcFSInode::update_timestamps(Optional<Time>, Optional<Time>, Optional<Time>)
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{
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// Note: Silently ignore the update request.
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return {};
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}
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static mode_t determine_procfs_process_inode_mode(SegmentedProcFSIndex::ProcessSubDirectory parent_subdirectory_type, Optional<SegmentedProcFSIndex::MainProcessProperty> main_property)
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{
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if (parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions)
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if (subdirectory == process_fd_subdirectory_root_entry.subdirectory)
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return S_IFLNK | 0400;
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if (parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::Stacks)
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if (subdirectory == process_stacks_subdirectory_root_entry.subdirectory)
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return S_IFREG | 0400;
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if (parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::Children)
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if (subdirectory == process_children_subdirectory_root_entry.subdirectory)
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return S_IFLNK | 0400;
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VERIFY(parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::Reserved);
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if (main_property == SegmentedProcFSIndex::MainProcessProperty::BinaryLink)
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VERIFY(subdirectory == main_process_directory_root_entry.subdirectory);
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if (property == process_exe_symlink_entry.property)
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return S_IFLNK | 0777;
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if (main_property == SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink)
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if (property == process_cwd_symlink_entry.property)
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return S_IFLNK | 0777;
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return S_IFREG | 0400;
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_file_description_link_inode(ProcFS const& procfs_instance, unsigned fd_number, ProcessID pid)
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static u16 extract_subdirectory_index_from_inode_index(InodeIndex inode_index)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, fd_number, pid));
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return (inode_index.value() >> 20) & 0xFFFF;
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}
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, unsigned file_description_index, ProcessID pid)
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: Inode(const_cast<ProcFS&>(procfs_instance), SegmentedProcFSIndex::build_segmented_index_for_file_description(pid, file_description_index))
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, m_type(Type::FileDescriptionLink)
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, m_parent_subdirectory_type(SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions)
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, m_associated_pid(pid)
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static u32 extract_property_index_from_inode_index(InodeIndex inode_index)
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{
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m_possible_data.property_index = file_description_index;
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return inode_index.value() & 0xFFFFF;
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_thread_stack_inode(ProcFS const& procfs_instance, ThreadID stack_thread_index, ProcessID pid)
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InodeIndex ProcFSInode::create_index_from_global_directory_entry(segmented_global_inode_index entry)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, stack_thread_index, pid));
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u64 inode_index = 0;
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VERIFY(entry.primary < 0x10000000);
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u64 tmp = entry.primary;
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inode_index |= tmp << 36;
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// NOTE: The sub-directory part is already limited to 0xFFFF, so no need to VERIFY it.
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tmp = entry.subdirectory;
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inode_index |= tmp << 20;
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VERIFY(entry.property < 0x100000);
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inode_index |= entry.property;
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return inode_index;
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}
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, ThreadID thread_stack_index, ProcessID pid)
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: Inode(const_cast<ProcFS&>(procfs_instance), SegmentedProcFSIndex::build_segmented_index_for_thread_stack(pid, thread_stack_index))
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, m_type(Type::ThreadStack)
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, m_parent_subdirectory_type(SegmentedProcFSIndex::ProcessSubDirectory::Stacks)
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, m_associated_pid(pid)
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InodeIndex ProcFSInode::create_index_from_process_directory_entry(ProcessID pid, segmented_process_directory_entry entry)
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{
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m_possible_data.property_index = thread_stack_index.value();
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u64 inode_index = 0;
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// NOTE: We use 0xFFFFFFF because PID part (bits 64-36) as 0 is reserved for global inodes.
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VERIFY(pid.value() < 0xFFFFFFF);
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u64 tmp = (pid.value() + 1);
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inode_index |= tmp << 36;
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// NOTE: The sub-directory part is already limited to 0xFFFF, so no need to VERIFY it.
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tmp = entry.subdirectory;
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inode_index |= tmp << 20;
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VERIFY(entry.property < 0x100000);
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inode_index |= entry.property;
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return inode_index;
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_pid_property_inode(ProcFS const& procfs_instance, SegmentedProcFSIndex::MainProcessProperty process_property, ProcessID pid)
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static Optional<ProcessID> extract_possible_pid_from_inode_index(InodeIndex inode_index)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, process_property, pid));
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auto pid_part = inode_index.value() >> 36;
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// NOTE: pid_part is set to 0 for global inodes.
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if (pid_part == 0)
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return {};
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return pid_part - 1;
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}
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, SegmentedProcFSIndex::MainProcessProperty main_property_type, ProcessID pid)
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: Inode(const_cast<ProcFS&>(procfs_instance), SegmentedProcFSIndex::build_segmented_index_for_main_property_in_pid_directory(pid, main_property_type))
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, m_type(Type::ProcessProperty)
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, m_parent_subdirectory_type(SegmentedProcFSIndex::ProcessSubDirectory::Reserved)
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, m_associated_pid(pid)
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, InodeIndex inode_index)
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: Inode(const_cast<ProcFS&>(procfs_instance), inode_index)
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, m_associated_pid(extract_possible_pid_from_inode_index(inode_index))
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, m_subdirectory(extract_subdirectory_index_from_inode_index(inode_index))
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, m_property(extract_property_index_from_inode_index(inode_index))
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{
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m_possible_data.property_type = main_property_type;
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if (inode_index == 1) {
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m_type = Type::RootDirectory;
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return;
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}
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if (inode_index == 2) {
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m_type = Type::SelfProcessLink;
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return;
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}
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if (m_property == 0) {
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if (m_subdirectory > 0)
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m_type = Type::ProcessSubdirectory;
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else
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m_type = Type::ProcessDirectory;
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return;
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}
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m_type = Type::ProcessProperty;
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_child_process_link_inode(ProcFS const& procfs_instance, ProcessID child_pid, ProcessID pid)
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ErrorOr<void> ProcFSInode::traverse_as_root_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, child_pid, pid));
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}
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TRY(callback({ "."sv, { fsid(), 1 }, 0 }));
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TRY(callback({ ".."sv, { fsid(), 0 }, 0 }));
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TRY(callback({ "self"sv, { fsid(), 2 }, 0 }));
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, ProcessID child_pid, ProcessID pid)
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: Inode(const_cast<ProcFS&>(procfs_instance), SegmentedProcFSIndex::build_segmented_index_for_children(pid, child_pid))
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, m_type(Type::ChildProcessLink)
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, m_parent_subdirectory_type(SegmentedProcFSIndex::ProcessSubDirectory::Children)
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, m_associated_pid(pid)
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{
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m_possible_data.property_index = child_pid.value();
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_process_directory_inode(ProcFS const& procfs_instance, ProcessID pid)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, pid));
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}
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, ProcessID pid)
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: Inode(const_cast<ProcFS&>(procfs_instance), SegmentedProcFSIndex::build_segmented_index_for_pid_directory(pid))
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, m_type(Type::ProcessDirectory)
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, m_associated_pid(pid)
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{
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_process_subdirectory_inode(ProcFS const& procfs_instance, SegmentedProcFSIndex::ProcessSubDirectory subdirectory_type, ProcessID pid)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, subdirectory_type, pid));
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}
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, SegmentedProcFSIndex::ProcessSubDirectory subdirectory_type, ProcessID pid)
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: Inode(const_cast<ProcFS&>(procfs_instance), SegmentedProcFSIndex::build_segmented_index_for_sub_directory(pid, subdirectory_type))
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, m_type(Type::ProcessSubdirectory)
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, m_subdirectory_type(subdirectory_type)
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, m_associated_pid(pid)
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{
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}
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ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_global_link_inode(ProcFS const& procfs_instance, ProcFSExposedLink const& link_component)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, link_component));
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}
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ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, ProcFSExposedLink const& link_component)
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: Inode(const_cast<ProcFS&>(procfs_instance), link_component.component_index())
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, m_type(Type::GlobalLink)
|
||||
, m_associated_component(link_component)
|
||||
{
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<ProcFSInode>> ProcFSInode::try_create_as_directory_inode(ProcFS const& procfs_instance, ProcFSExposedDirectory const& directory_component)
|
||||
{
|
||||
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSInode(procfs_instance, directory_component));
|
||||
}
|
||||
|
||||
ProcFSInode::ProcFSInode(ProcFS const& procfs_instance, ProcFSExposedDirectory const& directory_component)
|
||||
: Inode(const_cast<ProcFS&>(procfs_instance), directory_component.component_index())
|
||||
, m_type(Type::GlobalDirectory)
|
||||
, m_associated_component(directory_component)
|
||||
{
|
||||
return Process::for_each_in_same_jail([&](Process& process) -> ErrorOr<void> {
|
||||
VERIFY(!(process.pid() < 0));
|
||||
u64 process_id = (u64)process.pid().value();
|
||||
InodeIdentifier identifier = { fsid(), static_cast<InodeIndex>(process_id << 36) };
|
||||
auto process_id_string = TRY(KString::formatted("{:d}", process_id));
|
||||
TRY(callback({ process_id_string->view(), identifier, 0 }));
|
||||
return {};
|
||||
});
|
||||
}
|
||||
|
||||
ErrorOr<void> ProcFSInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
|
||||
|
|
@ -191,16 +127,15 @@ ErrorOr<void> ProcFSInode::traverse_as_directory(Function<ErrorOr<void>(FileSyst
|
|||
MutexLocker locker(procfs().m_lock);
|
||||
if (m_type == Type::ProcessSubdirectory) {
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
VERIFY(m_subdirectory_type.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return EINVAL;
|
||||
switch (m_subdirectory_type.value()) {
|
||||
case SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions:
|
||||
switch (m_subdirectory) {
|
||||
case process_fd_subdirectory_root_entry.subdirectory:
|
||||
return process->traverse_file_descriptions_directory(procfs().fsid(), move(callback));
|
||||
case SegmentedProcFSIndex::ProcessSubDirectory::Stacks:
|
||||
case process_stacks_subdirectory_root_entry.subdirectory:
|
||||
return process->traverse_stacks_directory(procfs().fsid(), move(callback));
|
||||
case SegmentedProcFSIndex::ProcessSubDirectory::Children:
|
||||
case process_children_subdirectory_root_entry.subdirectory:
|
||||
return process->traverse_children_directory(procfs().fsid(), move(callback));
|
||||
default:
|
||||
VERIFY_NOT_REACHED();
|
||||
|
|
@ -208,16 +143,33 @@ ErrorOr<void> ProcFSInode::traverse_as_directory(Function<ErrorOr<void>(FileSyst
|
|||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
|
||||
if (m_type == Type::GlobalDirectory) {
|
||||
VERIFY(m_associated_component);
|
||||
return m_associated_component->traverse_as_directory(procfs().fsid(), move(callback));
|
||||
if (m_type == Type::RootDirectory) {
|
||||
return traverse_as_root_directory(move(callback));
|
||||
}
|
||||
|
||||
VERIFY(m_type == Type::ProcessDirectory);
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return EINVAL;
|
||||
return process->procfs_traits()->traverse_as_directory(procfs().fsid(), move(callback));
|
||||
return process->traverse_as_directory(procfs().fsid(), move(callback));
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::lookup_as_root_directory(StringView name)
|
||||
{
|
||||
if (name == "self"sv)
|
||||
return procfs().get_inode({ fsid(), 2 });
|
||||
|
||||
auto pid = name.to_uint<unsigned>();
|
||||
if (!pid.has_value())
|
||||
return ESRCH;
|
||||
auto actual_pid = pid.value();
|
||||
|
||||
if (auto maybe_process = Process::from_pid_in_same_jail(actual_pid)) {
|
||||
InodeIndex id = (static_cast<u64>(maybe_process->pid().value()) + 1) << 36;
|
||||
return procfs().get_inode({ fsid(), id });
|
||||
}
|
||||
return ENOENT;
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::lookup(StringView name)
|
||||
|
|
@ -225,16 +177,15 @@ ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::lookup(StringView name)
|
|||
MutexLocker locker(procfs().m_lock);
|
||||
if (m_type == Type::ProcessSubdirectory) {
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
VERIFY(m_subdirectory_type.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return ESRCH;
|
||||
switch (m_subdirectory_type.value()) {
|
||||
case SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions:
|
||||
switch (m_subdirectory) {
|
||||
case process_fd_subdirectory_root_entry.subdirectory:
|
||||
return process->lookup_file_descriptions_directory(procfs(), name);
|
||||
case SegmentedProcFSIndex::ProcessSubDirectory::Stacks:
|
||||
case process_stacks_subdirectory_root_entry.subdirectory:
|
||||
return process->lookup_stacks_directory(procfs(), name);
|
||||
case SegmentedProcFSIndex::ProcessSubDirectory::Children:
|
||||
case process_children_subdirectory_root_entry.subdirectory:
|
||||
return process->lookup_children_directory(procfs(), name);
|
||||
default:
|
||||
VERIFY_NOT_REACHED();
|
||||
|
|
@ -242,10 +193,8 @@ ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::lookup(StringView name)
|
|||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
|
||||
if (m_type == Type::GlobalDirectory) {
|
||||
VERIFY(m_associated_component);
|
||||
auto component = TRY(m_associated_component->lookup(name));
|
||||
return TRY(component->to_inode(procfs()));
|
||||
if (m_type == Type::RootDirectory) {
|
||||
return lookup_as_root_directory(name);
|
||||
}
|
||||
|
||||
VERIFY(m_type == Type::ProcessDirectory);
|
||||
|
|
@ -253,53 +202,23 @@ ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::lookup(StringView name)
|
|||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return ESRCH;
|
||||
if (name == "fd"sv)
|
||||
return TRY(ProcFSInode::try_create_as_process_subdirectory_inode(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions, m_associated_pid.value()));
|
||||
if (name == "stacks"sv)
|
||||
return TRY(ProcFSInode::try_create_as_process_subdirectory_inode(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::Stacks, m_associated_pid.value()));
|
||||
if (name == "children"sv)
|
||||
return TRY(ProcFSInode::try_create_as_process_subdirectory_inode(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::Children, m_associated_pid.value()));
|
||||
if (name == "unveil"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::Unveil, m_associated_pid.value()));
|
||||
if (name == "pledge"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::Pledge, m_associated_pid.value()));
|
||||
if (name == "fds"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::OpenFileDescriptions, m_associated_pid.value()));
|
||||
if (name == "exe"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::BinaryLink, m_associated_pid.value()));
|
||||
if (name == "cwd"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink, m_associated_pid.value()));
|
||||
if (name == "perf_events"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::PerformanceEvents, m_associated_pid.value()));
|
||||
if (name == "vm"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats, m_associated_pid.value()));
|
||||
if (name == "cmdline"sv)
|
||||
return TRY(ProcFSInode::try_create_as_pid_property_inode(procfs(), SegmentedProcFSIndex::MainProcessProperty::CommandLine, m_associated_pid.value()));
|
||||
return ENOENT;
|
||||
return process->lookup_as_directory(procfs(), name);
|
||||
}
|
||||
|
||||
ErrorOr<void> ProcFSInode::attach(OpenFileDescription& description)
|
||||
{
|
||||
if (m_type == Type::GlobalDirectory || m_type == Type::ProcessDirectory || m_type == Type::ProcessSubdirectory)
|
||||
if (m_type == Type::RootDirectory || m_type == Type::SelfProcessLink || m_type == Type::ProcessDirectory || m_type == Type::ProcessSubdirectory)
|
||||
return {};
|
||||
if (m_type == Type::GlobalLink)
|
||||
return m_associated_component->refresh_data(description);
|
||||
VERIFY(m_type == Type::ProcessProperty || m_type == Type::FileDescriptionLink || m_type == Type::ThreadStack || m_type == Type::ChildProcessLink);
|
||||
VERIFY(m_type == Type::ProcessProperty);
|
||||
return refresh_process_property_data(description);
|
||||
}
|
||||
|
||||
void ProcFSInode::did_seek(OpenFileDescription& description, off_t offset)
|
||||
{
|
||||
if (m_type == Type::GlobalLink) {
|
||||
if (offset != 0)
|
||||
return;
|
||||
auto result = m_associated_component->refresh_data(description);
|
||||
if (result.is_error()) {
|
||||
// Subsequent calls to read will return EIO!
|
||||
dbgln("ProcFS: Could not refresh contents: {}", result.error());
|
||||
}
|
||||
if (m_type == Type::SelfProcessLink) {
|
||||
return;
|
||||
}
|
||||
VERIFY(m_type == Type::ProcessProperty || m_type == Type::FileDescriptionLink || m_type == Type::ThreadStack || m_type == Type::ChildProcessLink);
|
||||
VERIFY(m_type == Type::ProcessProperty);
|
||||
if (offset != 0)
|
||||
return;
|
||||
(void)refresh_process_property_data(description);
|
||||
|
|
@ -308,15 +227,24 @@ void ProcFSInode::did_seek(OpenFileDescription& description, off_t offset)
|
|||
ErrorOr<size_t> ProcFSInode::read_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription* description) const
|
||||
{
|
||||
dbgln_if(PROCFS_DEBUG, "ProcFSInode: read_bytes_locked offset: {} count: {}", offset, count);
|
||||
if (m_type == Type::GlobalLink) {
|
||||
VERIFY(m_associated_component);
|
||||
return m_associated_component->read_bytes(offset, count, buffer, description);
|
||||
}
|
||||
|
||||
VERIFY(m_type == Type::ProcessProperty || m_type == Type::FileDescriptionLink || m_type == Type::ThreadStack || m_type == Type::ChildProcessLink);
|
||||
VERIFY(offset >= 0);
|
||||
VERIFY(buffer.user_or_kernel_ptr());
|
||||
|
||||
if (m_type == Type::SelfProcessLink) {
|
||||
auto builder = TRY(KBufferBuilder::try_create());
|
||||
TRY(builder.appendff("{}", Process::current().pid().value()));
|
||||
auto data_buffer = builder.build();
|
||||
if (!data_buffer)
|
||||
return Error::from_errno(EFAULT);
|
||||
if ((size_t)offset >= data_buffer->size())
|
||||
return 0;
|
||||
ssize_t nread = min(static_cast<off_t>(data_buffer->size() - offset), static_cast<off_t>(count));
|
||||
TRY(buffer.write(data_buffer->data() + offset, nread));
|
||||
return nread;
|
||||
}
|
||||
|
||||
VERIFY(m_type == Type::ProcessProperty);
|
||||
|
||||
if (!description) {
|
||||
auto builder = TRY(KBufferBuilder::try_create());
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
|
|
@ -327,10 +255,13 @@ ErrorOr<size_t> ProcFSInode::read_bytes_locked(off_t offset, size_t count, UserO
|
|||
auto data_buffer = builder.build();
|
||||
if (!data_buffer)
|
||||
return Error::from_errno(EFAULT);
|
||||
if ((size_t)offset >= data_buffer->size())
|
||||
return 0;
|
||||
ssize_t nread = min(static_cast<off_t>(data_buffer->size() - offset), static_cast<off_t>(count));
|
||||
TRY(buffer.write(data_buffer->data() + offset, nread));
|
||||
return nread;
|
||||
}
|
||||
|
||||
if (!description->data()) {
|
||||
dbgln("ProcFS Process Information: Do not have cached data!");
|
||||
return Error::from_errno(EIO);
|
||||
|
|
@ -346,7 +277,6 @@ ErrorOr<size_t> ProcFSInode::read_bytes_locked(off_t offset, size_t count, UserO
|
|||
|
||||
ssize_t nread = min(static_cast<off_t>(data_buffer->size() - offset), static_cast<off_t>(count));
|
||||
TRY(buffer.write(data_buffer->data() + offset, nread));
|
||||
|
||||
return nread;
|
||||
}
|
||||
|
||||
|
|
@ -360,40 +290,43 @@ static ErrorOr<void> build_from_cached_data(KBufferBuilder& builder, ProcFSInode
|
|||
|
||||
ErrorOr<void> ProcFSInode::try_fetch_process_property_data(NonnullLockRefPtr<Process> process, KBufferBuilder& builder) const
|
||||
{
|
||||
VERIFY(m_type == Type::ProcessProperty || m_type == Type::FileDescriptionLink || m_type == Type::ThreadStack || m_type == Type::ChildProcessLink);
|
||||
VERIFY(m_parent_subdirectory_type.has_value());
|
||||
auto parent_subdirectory_type = m_parent_subdirectory_type.value();
|
||||
if (parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions) {
|
||||
TRY(process->procfs_get_file_description_link(m_possible_data.property_index, builder));
|
||||
VERIFY(m_type == Type::ProcessProperty);
|
||||
if (m_subdirectory == process_fd_subdirectory_root_entry.subdirectory) {
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
// Therefore subtract 1 to get the actual correct fd number.
|
||||
TRY(process->procfs_get_file_description_link(m_property - 1, builder));
|
||||
return {};
|
||||
}
|
||||
if (parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::Stacks) {
|
||||
TRY(process->procfs_get_thread_stack(m_possible_data.property_index, builder));
|
||||
if (m_subdirectory == process_stacks_subdirectory_root_entry.subdirectory) {
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
// Therefore subtract 1 to get the actual correct thread stack number.
|
||||
TRY(process->procfs_get_thread_stack(m_property - 1, builder));
|
||||
return {};
|
||||
}
|
||||
if (parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::Children) {
|
||||
TRY(process->procfs_get_child_process_link(m_possible_data.property_index, builder));
|
||||
if (m_subdirectory == process_children_subdirectory_root_entry.subdirectory) {
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
// Therefore subtract 1 to get the actual correct child process index number for a correct symlink.
|
||||
TRY(process->procfs_get_child_process_link(m_property - 1, builder));
|
||||
return {};
|
||||
}
|
||||
|
||||
VERIFY(m_type == Type::ProcessProperty);
|
||||
VERIFY(parent_subdirectory_type == SegmentedProcFSIndex::ProcessSubDirectory::Reserved);
|
||||
switch (m_possible_data.property_type) {
|
||||
case SegmentedProcFSIndex::MainProcessProperty::Unveil:
|
||||
VERIFY(m_subdirectory == main_process_directory_root_entry.subdirectory);
|
||||
switch (m_property) {
|
||||
case process_unveil_list_entry.property:
|
||||
return process->procfs_get_unveil_stats(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::Pledge:
|
||||
case process_pledge_list_entry.property:
|
||||
return process->procfs_get_pledge_stats(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::OpenFileDescriptions:
|
||||
case process_fds_list_entry.property:
|
||||
return process->procfs_get_fds_stats(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::BinaryLink:
|
||||
case process_exe_symlink_entry.property:
|
||||
return process->procfs_get_binary_link(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink:
|
||||
case process_cwd_symlink_entry.property:
|
||||
return process->procfs_get_current_work_directory_link(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::PerformanceEvents:
|
||||
case process_perf_events_entry.property:
|
||||
return process->procfs_get_perf_events(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats:
|
||||
case process_vm_entry.property:
|
||||
return process->procfs_get_virtual_memory_stats(builder);
|
||||
case SegmentedProcFSIndex::MainProcessProperty::CommandLine:
|
||||
case process_cmdline_entry.property:
|
||||
return process->procfs_get_command_line(builder);
|
||||
default:
|
||||
VERIFY_NOT_REACHED();
|
||||
|
|
@ -405,7 +338,7 @@ ErrorOr<void> ProcFSInode::refresh_process_property_data(OpenFileDescription& de
|
|||
// For process-specific inodes, hold the process's ptrace lock across refresh
|
||||
// and refuse to load data if the process is not dumpable.
|
||||
// Without this, files opened before a process went non-dumpable could still be used for dumping.
|
||||
VERIFY(m_type == Type::ProcessProperty || m_type == Type::FileDescriptionLink || m_type == Type::ThreadStack || m_type == Type::ChildProcessLink);
|
||||
VERIFY(m_type == Type::ProcessProperty);
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
|
|
@ -434,50 +367,22 @@ InodeMetadata ProcFSInode::metadata() const
|
|||
{
|
||||
InodeMetadata metadata;
|
||||
switch (m_type) {
|
||||
case Type::GlobalLink: {
|
||||
metadata.inode = { fsid(), m_associated_component->component_index() };
|
||||
metadata.mode = S_IFLNK | m_associated_component->required_mode();
|
||||
metadata.uid = m_associated_component->owner_user();
|
||||
metadata.gid = m_associated_component->owner_group();
|
||||
case Type::SelfProcessLink: {
|
||||
metadata.inode = { fsid(), 2 };
|
||||
metadata.mode = S_IFLNK | 0777;
|
||||
metadata.uid = 0;
|
||||
metadata.gid = 0;
|
||||
metadata.size = 0;
|
||||
metadata.mtime = m_associated_component->modified_time();
|
||||
metadata.mtime = TimeManagement::boot_time();
|
||||
break;
|
||||
}
|
||||
case Type::GlobalDirectory: {
|
||||
metadata.inode = { fsid(), m_associated_component->component_index() };
|
||||
metadata.mode = S_IFDIR | m_associated_component->required_mode();
|
||||
metadata.uid = m_associated_component->owner_user();
|
||||
metadata.gid = m_associated_component->owner_group();
|
||||
case Type::RootDirectory: {
|
||||
metadata.inode = { fsid(), 1 };
|
||||
metadata.mode = S_IFDIR | 0555;
|
||||
metadata.uid = 0;
|
||||
metadata.gid = 0;
|
||||
metadata.size = 0;
|
||||
metadata.mtime = m_associated_component->modified_time();
|
||||
break;
|
||||
}
|
||||
case Type::FileDescriptionLink: {
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return {};
|
||||
auto traits = process->procfs_traits();
|
||||
metadata.inode = { fsid(), SegmentedProcFSIndex::build_segmented_index_for_file_description(m_associated_pid.value(), m_possible_data.property_index) };
|
||||
metadata.mode = determine_procfs_process_inode_mode(m_parent_subdirectory_type.value(), {});
|
||||
metadata.uid = traits->owner_user();
|
||||
metadata.gid = traits->owner_group();
|
||||
metadata.size = 0;
|
||||
metadata.mtime = traits->modified_time();
|
||||
break;
|
||||
}
|
||||
case Type::ThreadStack: {
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return {};
|
||||
auto traits = process->procfs_traits();
|
||||
metadata.inode = { fsid(), SegmentedProcFSIndex::build_segmented_index_for_thread_stack(m_associated_pid.value(), m_possible_data.property_index) };
|
||||
metadata.mode = determine_procfs_process_inode_mode(m_parent_subdirectory_type.value(), {});
|
||||
metadata.uid = traits->owner_user();
|
||||
metadata.gid = traits->owner_group();
|
||||
metadata.size = 0;
|
||||
metadata.mtime = traits->modified_time();
|
||||
metadata.mtime = TimeManagement::boot_time();
|
||||
break;
|
||||
}
|
||||
case Type::ProcessProperty: {
|
||||
|
|
@ -485,27 +390,13 @@ InodeMetadata ProcFSInode::metadata() const
|
|||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return {};
|
||||
auto traits = process->procfs_traits();
|
||||
metadata.inode = { fsid(), SegmentedProcFSIndex::build_segmented_index_for_main_property_in_pid_directory(m_associated_pid.value(), m_possible_data.property_type) };
|
||||
metadata.mode = determine_procfs_process_inode_mode(m_parent_subdirectory_type.value(), m_possible_data.property_type);
|
||||
metadata.uid = traits->owner_user();
|
||||
metadata.gid = traits->owner_group();
|
||||
metadata.inode = identifier();
|
||||
metadata.mode = determine_procfs_process_inode_mode(m_subdirectory, m_property);
|
||||
auto credentials = process->credentials();
|
||||
metadata.uid = credentials->uid();
|
||||
metadata.gid = credentials->gid();
|
||||
metadata.size = 0;
|
||||
metadata.mtime = traits->modified_time();
|
||||
break;
|
||||
}
|
||||
case Type::ChildProcessLink: {
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return {};
|
||||
auto traits = process->procfs_traits();
|
||||
metadata.inode = { fsid(), SegmentedProcFSIndex::build_segmented_index_for_children(m_associated_pid.value(), m_possible_data.property_index) };
|
||||
metadata.mode = determine_procfs_process_inode_mode(m_parent_subdirectory_type.value(), {});
|
||||
metadata.uid = traits->owner_user();
|
||||
metadata.gid = traits->owner_group();
|
||||
metadata.size = 0;
|
||||
metadata.mtime = traits->modified_time();
|
||||
metadata.mtime = TimeManagement::now();
|
||||
break;
|
||||
}
|
||||
case Type::ProcessDirectory: {
|
||||
|
|
@ -513,28 +404,27 @@ InodeMetadata ProcFSInode::metadata() const
|
|||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return {};
|
||||
auto traits = process->procfs_traits();
|
||||
metadata.inode = { fsid(), traits->component_index() };
|
||||
metadata.mode = S_IFDIR | traits->required_mode();
|
||||
metadata.uid = traits->owner_user();
|
||||
metadata.gid = traits->owner_group();
|
||||
metadata.inode = identifier();
|
||||
metadata.mode = S_IFDIR | 0555;
|
||||
auto credentials = process->credentials();
|
||||
metadata.uid = credentials->uid();
|
||||
metadata.gid = credentials->gid();
|
||||
metadata.size = 0;
|
||||
metadata.mtime = traits->modified_time();
|
||||
metadata.mtime = TimeManagement::now();
|
||||
break;
|
||||
}
|
||||
case Type::ProcessSubdirectory: {
|
||||
VERIFY(m_associated_pid.has_value());
|
||||
VERIFY(m_subdirectory_type.has_value());
|
||||
auto process = Process::from_pid_in_same_jail(m_associated_pid.value());
|
||||
if (!process)
|
||||
return {};
|
||||
auto traits = process->procfs_traits();
|
||||
metadata.inode = { fsid(), SegmentedProcFSIndex::build_segmented_index_for_sub_directory(m_associated_pid.value(), m_subdirectory_type.value()) };
|
||||
metadata.mode = S_IFDIR | traits->required_mode();
|
||||
metadata.uid = traits->owner_user();
|
||||
metadata.gid = traits->owner_group();
|
||||
metadata.inode = identifier();
|
||||
metadata.mode = S_IFDIR | 0555;
|
||||
auto credentials = process->credentials();
|
||||
metadata.uid = credentials->uid();
|
||||
metadata.gid = credentials->gid();
|
||||
metadata.size = 0;
|
||||
metadata.mtime = traits->modified_time();
|
||||
metadata.mtime = TimeManagement::now();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||
* Copyright (c) 2022-2023, Liav A. <liavalb@hotmail.co.il>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -8,95 +9,73 @@
|
|||
|
||||
#include <Kernel/FileSystem/Inode.h>
|
||||
#include <Kernel/FileSystem/OpenFileDescription.h>
|
||||
#include <Kernel/FileSystem/ProcFS/Definitions.h>
|
||||
#include <Kernel/FileSystem/ProcFS/FileSystem.h>
|
||||
#include <Kernel/ProcessExposed.h>
|
||||
#include <Kernel/KBufferBuilder.h>
|
||||
#include <Kernel/UnixTypes.h>
|
||||
|
||||
namespace Kernel {
|
||||
struct ProcFSInodeData : public OpenFileDescriptionData {
|
||||
OwnPtr<KBuffer> buffer;
|
||||
};
|
||||
|
||||
class ProcFSExposedDirectory;
|
||||
class ProcFSExposedLink;
|
||||
class ProcFSInode final : public Inode {
|
||||
friend class ProcFS;
|
||||
|
||||
public:
|
||||
enum class Type {
|
||||
GlobalLink,
|
||||
GlobalDirectory,
|
||||
FileDescriptionLink,
|
||||
ThreadStack,
|
||||
RootDirectory,
|
||||
SelfProcessLink,
|
||||
ProcessProperty,
|
||||
ChildProcessLink,
|
||||
ProcessDirectory,
|
||||
ProcessSubdirectory,
|
||||
};
|
||||
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_file_description_link_inode(ProcFS const&, unsigned, ProcessID);
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_thread_stack_inode(ProcFS const&, ThreadID, ProcessID);
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_pid_property_inode(ProcFS const&, SegmentedProcFSIndex::MainProcessProperty, ProcessID);
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_child_process_link_inode(ProcFS const&, ProcessID, ProcessID);
|
||||
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_process_directory_inode(ProcFS const&, ProcessID);
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_process_subdirectory_inode(ProcFS const&, SegmentedProcFSIndex::ProcessSubDirectory, ProcessID);
|
||||
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_directory_inode(ProcFS const&, ProcFSExposedDirectory const&);
|
||||
static ErrorOr<NonnullLockRefPtr<ProcFSInode>> try_create_as_global_link_inode(ProcFS const&, ProcFSExposedLink const&);
|
||||
static InodeIndex create_index_from_global_directory_entry(segmented_global_inode_index entry);
|
||||
static InodeIndex create_index_from_process_directory_entry(ProcessID pid, segmented_process_directory_entry entry);
|
||||
|
||||
virtual ~ProcFSInode() override;
|
||||
|
||||
private:
|
||||
// ProcFS PID property inode (/proc/PID/PROPERTY)
|
||||
ProcFSInode(ProcFS const&, SegmentedProcFSIndex::MainProcessProperty, ProcessID);
|
||||
// ProcFS Thread stack inode (/proc/PID/stacks/TID)
|
||||
ProcFSInode(ProcFS const&, ThreadID, ProcessID);
|
||||
// ProcFS File description link inode (/proc/PID/fd/FD)
|
||||
ProcFSInode(ProcFS const&, unsigned, ProcessID);
|
||||
// ProcFS Child process link inode (/proc/PID/children/CHILD_PID)
|
||||
ProcFSInode(ProcFS const&, ProcessID, ProcessID);
|
||||
// ProcFS Process directory inode (/proc/PID/)
|
||||
ProcFSInode(ProcFS const&, ProcessID);
|
||||
// ProcFS Process sub directory inode (/proc/PID/SUBDIRECTORY)
|
||||
ProcFSInode(ProcFS const&, SegmentedProcFSIndex::ProcessSubDirectory, ProcessID);
|
||||
|
||||
ProcFSInode(ProcFS const&, ProcFSExposedLink const&);
|
||||
ProcFSInode(ProcFS const&, ProcFSExposedDirectory const&);
|
||||
ProcFSInode(ProcFS const&, InodeIndex);
|
||||
|
||||
ProcFS& procfs() { return static_cast<ProcFS&>(Inode::fs()); }
|
||||
ProcFS const& procfs() const { return static_cast<ProcFS const&>(Inode::fs()); }
|
||||
|
||||
// ^Inode (EROFS handling)
|
||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView, mode_t, dev_t, UserID, GroupID) override { return EROFS; }
|
||||
virtual ErrorOr<void> add_child(Inode&, StringView, mode_t) override { return EROFS; }
|
||||
virtual ErrorOr<void> remove_child(StringView) override { return EROFS; }
|
||||
virtual ErrorOr<void> replace_child(StringView, Inode&) override { return EROFS; }
|
||||
virtual ErrorOr<void> chmod(mode_t) override { return EROFS; }
|
||||
virtual ErrorOr<void> chown(UserID, GroupID) override { return EROFS; }
|
||||
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*) override { return EROFS; }
|
||||
virtual ErrorOr<void> truncate(u64) override { return EROFS; }
|
||||
|
||||
// ^Inode (Silent ignore handling)
|
||||
virtual ErrorOr<void> flush_metadata() override { return {}; }
|
||||
virtual ErrorOr<void> update_timestamps(Optional<Time>, Optional<Time>, Optional<Time>) override { return {}; }
|
||||
|
||||
// ^Inode
|
||||
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
||||
virtual void did_seek(OpenFileDescription&, off_t) override;
|
||||
virtual ErrorOr<void> flush_metadata() override final;
|
||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
|
||||
virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override final;
|
||||
virtual ErrorOr<void> remove_child(StringView name) override final;
|
||||
virtual ErrorOr<void> replace_child(StringView name, Inode& child) override final;
|
||||
virtual ErrorOr<void> chmod(mode_t) override final;
|
||||
virtual ErrorOr<void> chown(UserID, GroupID) override final;
|
||||
virtual InodeMetadata metadata() const override;
|
||||
ErrorOr<void> traverse_as_root_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const;
|
||||
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
||||
|
||||
virtual InodeMetadata metadata() const override;
|
||||
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
|
||||
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override;
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> lookup_as_root_directory(StringView name);
|
||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override final;
|
||||
virtual ErrorOr<void> truncate(u64) override final;
|
||||
virtual ErrorOr<void> update_timestamps(Optional<Time> atime, Optional<Time> ctime, Optional<Time> mtime) override;
|
||||
|
||||
ErrorOr<void> refresh_process_property_data(OpenFileDescription& description);
|
||||
ErrorOr<void> try_fetch_process_property_data(NonnullLockRefPtr<Process>, KBufferBuilder& builder) const;
|
||||
|
||||
Type m_type;
|
||||
|
||||
union {
|
||||
SegmentedProcFSIndex::MainProcessProperty property_type;
|
||||
unsigned property_index;
|
||||
} m_possible_data;
|
||||
Optional<SegmentedProcFSIndex::ProcessSubDirectory> const m_parent_subdirectory_type {};
|
||||
Optional<SegmentedProcFSIndex::ProcessSubDirectory> const m_subdirectory_type {};
|
||||
|
||||
Optional<ProcessID> const m_associated_pid {};
|
||||
u16 const m_subdirectory { 0 };
|
||||
u32 const m_property { 0 };
|
||||
|
||||
LockRefPtr<ProcFSExposedComponent> m_associated_component;
|
||||
mutable Mutex m_refresh_lock;
|
||||
};
|
||||
|
||||
|
|
|
|||
372
Kernel/FileSystem/ProcFS/ProcessExposed.cpp
Normal file
372
Kernel/FileSystem/ProcFS/ProcessExposed.cpp
Normal file
|
|
@ -0,0 +1,372 @@
|
|||
/*
|
||||
* Copyright (c) 2021-2023, Liav A. <liavalb@hotmail.co.il>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <AK/JsonArraySerializer.h>
|
||||
#include <AK/JsonObjectSerializer.h>
|
||||
#include <AK/JsonValue.h>
|
||||
#include <Kernel/FileSystem/Custody.h>
|
||||
#include <Kernel/FileSystem/ProcFS/Inode.h>
|
||||
#include <Kernel/InterruptDisabler.h>
|
||||
#include <Kernel/KBufferBuilder.h>
|
||||
#include <Kernel/Memory/AnonymousVMObject.h>
|
||||
#include <Kernel/Memory/MemoryManager.h>
|
||||
#include <Kernel/Process.h>
|
||||
#include <Kernel/TTY/TTY.h>
|
||||
|
||||
namespace Kernel {
|
||||
|
||||
ErrorOr<void> Process::traverse_as_directory(FileSystemID fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
|
||||
{
|
||||
TRY(callback({ main_process_directory_root_entry.name, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), main_process_directory_root_entry) }, main_process_directory_root_entry.file_type }));
|
||||
TRY(callback({ ".."sv, { fsid, ProcFSInode::create_index_from_global_directory_entry(global_inode_ids[0]) }, global_inode_ids[0].file_type }));
|
||||
|
||||
for (auto& entry : main_process_directory_entries) {
|
||||
TRY(callback({ entry.name, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), entry) }, entry.file_type }));
|
||||
}
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> Process::lookup_as_directory(ProcFS& procfs, StringView name) const
|
||||
{
|
||||
for (auto& entry : main_process_directory_entries) {
|
||||
if (entry.name == name)
|
||||
return procfs.get_inode({ procfs.fsid(), ProcFSInode::create_index_from_process_directory_entry(pid(), entry) });
|
||||
}
|
||||
return ENOENT;
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_thread_stack(ThreadID thread_id, KBufferBuilder& builder) const
|
||||
{
|
||||
auto array = TRY(JsonArraySerializer<>::try_create(builder));
|
||||
auto thread = Thread::from_tid(thread_id);
|
||||
if (!thread)
|
||||
return ESRCH;
|
||||
auto current_process_credentials = Process::current().credentials();
|
||||
bool show_kernel_addresses = current_process_credentials->is_superuser();
|
||||
bool kernel_address_added = false;
|
||||
for (auto address : TRY(Processor::capture_stack_trace(*thread, 1024))) {
|
||||
if (!show_kernel_addresses && !Memory::is_user_address(VirtualAddress { address })) {
|
||||
if (kernel_address_added)
|
||||
continue;
|
||||
address = 0xdeadc0de;
|
||||
kernel_address_added = true;
|
||||
}
|
||||
TRY(array.add(address));
|
||||
}
|
||||
|
||||
TRY(array.finish());
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::traverse_stacks_directory(FileSystemID fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
|
||||
{
|
||||
TRY(callback({ "."sv, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), process_stacks_subdirectory_root_entry) }, DT_DIR }));
|
||||
TRY(callback({ ".."sv, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), main_process_directory_root_entry) }, main_process_directory_root_entry.file_type }));
|
||||
|
||||
return thread_list().with([&](auto& list) -> ErrorOr<void> {
|
||||
for (auto const& thread : list) {
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
auto entry = segmented_process_directory_entry { {}, DT_REG, process_stacks_subdirectory_root_entry.subdirectory, static_cast<u32>(thread.tid().value() + 1) };
|
||||
InodeIdentifier identifier = { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), entry) };
|
||||
auto name = TRY(KString::number(thread.tid().value()));
|
||||
TRY(callback({ name->view(), identifier, 0 }));
|
||||
}
|
||||
return {};
|
||||
});
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> Process::lookup_stacks_directory(ProcFS& procfs, StringView name) const
|
||||
{
|
||||
auto maybe_needle = name.to_uint();
|
||||
if (!maybe_needle.has_value())
|
||||
return ENOENT;
|
||||
auto needle = maybe_needle.release_value();
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> thread_stack_inode { ENOENT };
|
||||
for_each_thread([&](Thread const& thread) {
|
||||
int tid = thread.tid().value();
|
||||
VERIFY(!(tid < 0));
|
||||
if (needle == (unsigned)tid) {
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
auto entry = segmented_process_directory_entry { {}, DT_REG, process_stacks_subdirectory_root_entry.subdirectory, static_cast<u32>(thread.tid().value() + 1) };
|
||||
thread_stack_inode = procfs.get_inode({ procfs.fsid(), ProcFSInode::create_index_from_process_directory_entry(pid(), entry) });
|
||||
return IterationDecision::Break;
|
||||
}
|
||||
return IterationDecision::Continue;
|
||||
});
|
||||
|
||||
if (thread_stack_inode.is_error())
|
||||
return thread_stack_inode.release_error();
|
||||
return thread_stack_inode.release_value();
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::traverse_children_directory(FileSystemID fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
|
||||
{
|
||||
TRY(callback({ "."sv, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), process_children_subdirectory_root_entry) }, DT_DIR }));
|
||||
TRY(callback({ ".."sv, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), main_process_directory_root_entry) }, main_process_directory_root_entry.file_type }));
|
||||
return Process::for_each_in_same_jail([&](Process& process) -> ErrorOr<void> {
|
||||
if (process.ppid() == pid()) {
|
||||
auto name = TRY(KString::number(process.pid().value()));
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
auto entry = segmented_process_directory_entry { {}, DT_LNK, process_children_subdirectory_root_entry.subdirectory, static_cast<u32>(process.pid().value() + 1) };
|
||||
InodeIdentifier identifier = { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), entry) };
|
||||
TRY(callback({ name->view(), identifier, DT_LNK }));
|
||||
}
|
||||
return {};
|
||||
});
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> Process::lookup_children_directory(ProcFS& procfs, StringView name) const
|
||||
{
|
||||
auto maybe_pid = name.to_uint();
|
||||
if (!maybe_pid.has_value())
|
||||
return ENOENT;
|
||||
|
||||
auto child_process = Process::from_pid_in_same_jail(*maybe_pid);
|
||||
if (!child_process || child_process->ppid() != pid())
|
||||
return ENOENT;
|
||||
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
auto entry = segmented_process_directory_entry { {}, DT_LNK, process_children_subdirectory_root_entry.subdirectory, (maybe_pid.value() + 1) };
|
||||
return procfs.get_inode({ procfs.fsid(), ProcFSInode::create_index_from_process_directory_entry(pid(), entry) });
|
||||
}
|
||||
|
||||
ErrorOr<size_t> Process::procfs_get_child_process_link(ProcessID child_pid, KBufferBuilder& builder) const
|
||||
{
|
||||
TRY(builder.appendff("../../{}", child_pid.value()));
|
||||
return builder.length();
|
||||
}
|
||||
|
||||
ErrorOr<size_t> Process::procfs_get_file_description_link(unsigned fd, KBufferBuilder& builder) const
|
||||
{
|
||||
auto file_description = TRY(open_file_description(fd));
|
||||
// Note: These links are not guaranteed to point to actual VFS paths, just like in other kernels.
|
||||
auto data = TRY(file_description->pseudo_path());
|
||||
TRY(builder.append(data->view()));
|
||||
return data->length();
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::traverse_file_descriptions_directory(FileSystemID fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
|
||||
{
|
||||
TRY(callback({ "."sv, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), process_fd_subdirectory_root_entry) }, DT_DIR }));
|
||||
TRY(callback({ ".."sv, { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), main_process_directory_root_entry) }, main_process_directory_root_entry.file_type }));
|
||||
u32 count = 0;
|
||||
TRY(fds().with_shared([&](auto& fds) -> ErrorOr<void> {
|
||||
return fds.try_enumerate([&](auto& file_description_metadata) -> ErrorOr<void> {
|
||||
if (!file_description_metadata.is_valid()) {
|
||||
count++;
|
||||
return {};
|
||||
}
|
||||
auto name = TRY(KString::number(count));
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
auto entry = segmented_process_directory_entry { {}, DT_LNK, process_fd_subdirectory_root_entry.subdirectory, count + 1 };
|
||||
InodeIdentifier identifier = { fsid, ProcFSInode::create_index_from_process_directory_entry(pid(), entry) };
|
||||
TRY(callback({ name->view(), identifier, DT_LNK }));
|
||||
count++;
|
||||
return {};
|
||||
});
|
||||
}));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<NonnullLockRefPtr<Inode>> Process::lookup_file_descriptions_directory(ProcFS& procfs, StringView name) const
|
||||
{
|
||||
auto maybe_index = name.to_uint();
|
||||
if (!maybe_index.has_value())
|
||||
return ENOENT;
|
||||
|
||||
if (!m_fds.with_shared([&](auto& fds) { return fds.get_if_valid(*maybe_index); }))
|
||||
return ENOENT;
|
||||
|
||||
// NOTE: All property numbers should start from 1 as 0 is reserved for the directory itself.
|
||||
auto entry = segmented_process_directory_entry { {}, DT_LNK, process_fd_subdirectory_root_entry.subdirectory, (maybe_index.value() + 1) };
|
||||
return procfs.get_inode({ procfs.fsid(), ProcFSInode::create_index_from_process_directory_entry(pid(), entry) });
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_pledge_stats(KBufferBuilder& builder) const
|
||||
{
|
||||
auto obj = TRY(JsonObjectSerializer<>::try_create(builder));
|
||||
#define __ENUMERATE_PLEDGE_PROMISE(x) \
|
||||
if (has_promised(Pledge::x)) { \
|
||||
if (!promises_builder.is_empty()) \
|
||||
TRY(promises_builder.try_append(' ')); \
|
||||
TRY(promises_builder.try_append(#x##sv)); \
|
||||
}
|
||||
if (has_promises()) {
|
||||
StringBuilder promises_builder;
|
||||
ENUMERATE_PLEDGE_PROMISES
|
||||
TRY(obj.add("promises"sv, promises_builder.string_view()));
|
||||
}
|
||||
#undef __ENUMERATE_PLEDGE_PROMISE
|
||||
TRY(obj.finish());
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_unveil_stats(KBufferBuilder& builder) const
|
||||
{
|
||||
auto array = TRY(JsonArraySerializer<>::try_create(builder));
|
||||
TRY(m_unveil_data.with([&](auto& unveil_data) -> ErrorOr<void> {
|
||||
TRY(unveil_data.paths.for_each_node_in_tree_order([&](auto const& unveiled_path) -> ErrorOr<IterationDecision> {
|
||||
if (!unveiled_path.was_explicitly_unveiled())
|
||||
return IterationDecision::Continue;
|
||||
auto obj = TRY(array.add_object());
|
||||
TRY(obj.add("path"sv, unveiled_path.path()));
|
||||
StringBuilder permissions_builder;
|
||||
if (unveiled_path.permissions() & UnveilAccess::Read)
|
||||
permissions_builder.append('r');
|
||||
if (unveiled_path.permissions() & UnveilAccess::Write)
|
||||
permissions_builder.append('w');
|
||||
if (unveiled_path.permissions() & UnveilAccess::Execute)
|
||||
permissions_builder.append('x');
|
||||
if (unveiled_path.permissions() & UnveilAccess::CreateOrRemove)
|
||||
permissions_builder.append('c');
|
||||
if (unveiled_path.permissions() & UnveilAccess::Browse)
|
||||
permissions_builder.append('b');
|
||||
TRY(obj.add("permissions"sv, permissions_builder.string_view()));
|
||||
TRY(obj.finish());
|
||||
return IterationDecision::Continue;
|
||||
}));
|
||||
return {};
|
||||
}));
|
||||
TRY(array.finish());
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_perf_events(KBufferBuilder& builder) const
|
||||
{
|
||||
InterruptDisabler disabler;
|
||||
if (!perf_events()) {
|
||||
dbgln("ProcFS: No perf events for {}", pid());
|
||||
return Error::from_errno(ENOBUFS);
|
||||
}
|
||||
return perf_events()->to_json(builder);
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_fds_stats(KBufferBuilder& builder) const
|
||||
{
|
||||
auto array = TRY(JsonArraySerializer<>::try_create(builder));
|
||||
|
||||
return fds().with_shared([&](auto& fds) -> ErrorOr<void> {
|
||||
if (fds.open_count() == 0) {
|
||||
TRY(array.finish());
|
||||
return {};
|
||||
}
|
||||
|
||||
size_t count = 0;
|
||||
TRY(fds.try_enumerate([&](auto& file_description_metadata) -> ErrorOr<void> {
|
||||
if (!file_description_metadata.is_valid()) {
|
||||
count++;
|
||||
return {};
|
||||
}
|
||||
bool cloexec = file_description_metadata.flags() & FD_CLOEXEC;
|
||||
LockRefPtr<OpenFileDescription> description = file_description_metadata.description();
|
||||
auto description_object = TRY(array.add_object());
|
||||
TRY(description_object.add("fd"sv, count));
|
||||
// TODO: Better OOM handling.
|
||||
auto pseudo_path_or_error = description->pseudo_path();
|
||||
TRY(description_object.add("absolute_path"sv, pseudo_path_or_error.is_error() ? "???"sv : pseudo_path_or_error.value()->view()));
|
||||
TRY(description_object.add("seekable"sv, description->file().is_seekable()));
|
||||
TRY(description_object.add("class"sv, description->file().class_name()));
|
||||
TRY(description_object.add("offset"sv, description->offset()));
|
||||
TRY(description_object.add("cloexec"sv, cloexec));
|
||||
TRY(description_object.add("blocking"sv, description->is_blocking()));
|
||||
TRY(description_object.add("can_read"sv, description->can_read()));
|
||||
TRY(description_object.add("can_write"sv, description->can_write()));
|
||||
Inode* inode = description->inode();
|
||||
if (inode != nullptr) {
|
||||
auto inode_object = TRY(description_object.add_object("inode"sv));
|
||||
TRY(inode_object.add("fsid"sv, inode->fsid().value()));
|
||||
TRY(inode_object.add("index"sv, inode->index().value()));
|
||||
TRY(inode_object.finish());
|
||||
}
|
||||
TRY(description_object.finish());
|
||||
count++;
|
||||
return {};
|
||||
}));
|
||||
|
||||
TRY(array.finish());
|
||||
return {};
|
||||
});
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_virtual_memory_stats(KBufferBuilder& builder) const
|
||||
{
|
||||
auto array = TRY(JsonArraySerializer<>::try_create(builder));
|
||||
TRY(address_space().with([&](auto& space) -> ErrorOr<void> {
|
||||
for (auto const& region : space->region_tree().regions()) {
|
||||
auto current_process_credentials = Process::current().credentials();
|
||||
if (!region.is_user() && !current_process_credentials->is_superuser())
|
||||
continue;
|
||||
auto region_object = TRY(array.add_object());
|
||||
TRY(region_object.add("readable"sv, region.is_readable()));
|
||||
TRY(region_object.add("writable"sv, region.is_writable()));
|
||||
TRY(region_object.add("executable"sv, region.is_executable()));
|
||||
TRY(region_object.add("stack"sv, region.is_stack()));
|
||||
TRY(region_object.add("shared"sv, region.is_shared()));
|
||||
TRY(region_object.add("syscall"sv, region.is_syscall_region()));
|
||||
TRY(region_object.add("purgeable"sv, region.vmobject().is_anonymous()));
|
||||
if (region.vmobject().is_anonymous()) {
|
||||
TRY(region_object.add("volatile"sv, static_cast<Memory::AnonymousVMObject const&>(region.vmobject()).is_volatile()));
|
||||
}
|
||||
TRY(region_object.add("cacheable"sv, region.is_cacheable()));
|
||||
TRY(region_object.add("address"sv, region.vaddr().get()));
|
||||
TRY(region_object.add("size"sv, region.size()));
|
||||
TRY(region_object.add("amount_resident"sv, region.amount_resident()));
|
||||
TRY(region_object.add("amount_dirty"sv, region.amount_dirty()));
|
||||
TRY(region_object.add("cow_pages"sv, region.cow_pages()));
|
||||
TRY(region_object.add("name"sv, region.name()));
|
||||
TRY(region_object.add("vmobject"sv, region.vmobject().class_name()));
|
||||
|
||||
StringBuilder pagemap_builder;
|
||||
for (size_t i = 0; i < region.page_count(); ++i) {
|
||||
auto page = region.physical_page(i);
|
||||
if (!page)
|
||||
pagemap_builder.append('N');
|
||||
else if (page->is_shared_zero_page() || page->is_lazy_committed_page())
|
||||
pagemap_builder.append('Z');
|
||||
else
|
||||
pagemap_builder.append('P');
|
||||
}
|
||||
TRY(region_object.add("pagemap"sv, pagemap_builder.string_view()));
|
||||
TRY(region_object.finish());
|
||||
}
|
||||
return {};
|
||||
}));
|
||||
TRY(array.finish());
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_current_work_directory_link(KBufferBuilder& builder) const
|
||||
{
|
||||
return builder.append(TRY(const_cast<Process&>(*this).current_directory()->try_serialize_absolute_path())->view());
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_command_line(KBufferBuilder& builder) const
|
||||
{
|
||||
auto array = TRY(JsonArraySerializer<>::try_create(builder));
|
||||
for (auto const& arg : arguments()) {
|
||||
TRY(array.add(arg.view()));
|
||||
}
|
||||
TRY(array.finish());
|
||||
return {};
|
||||
}
|
||||
|
||||
mode_t Process::binary_link_required_mode() const
|
||||
{
|
||||
if (!executable())
|
||||
return 0;
|
||||
return 0555;
|
||||
}
|
||||
|
||||
ErrorOr<void> Process::procfs_get_binary_link(KBufferBuilder& builder) const
|
||||
{
|
||||
auto custody = executable();
|
||||
if (!custody)
|
||||
return Error::from_errno(ENOEXEC);
|
||||
return builder.append(TRY(custody->try_serialize_absolute_path())->view());
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue