mirror of
https://github.com/SerenityOS/serenity
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Kernel: Split the ProcFS core file into smaller components
This commit is contained in:
parent
e882b2ed05
commit
3906dd3aa3
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@ -8,7 +8,6 @@
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#include <AK/Types.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/x86/ISABus/IDEController.h>
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#include <Kernel/Arch/x86/ISABus/IDEController.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/FileSystem/ProcFS.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Storage/ATA/ATADiskDevice.h>
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#include <Kernel/Storage/ATA/ATADiskDevice.h>
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#include <AK/Types.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/x86/PCI/IDELegacyModeController.h>
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#include <Kernel/Arch/x86/PCI/IDELegacyModeController.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/FileSystem/ProcFS.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Storage/ATA/ATADiskDevice.h>
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#include <Kernel/Storage/ATA/ATADiskDevice.h>
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@ -125,7 +125,16 @@ set(KERNEL_SOURCES
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FileSystem/Mount.cpp
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FileSystem/Mount.cpp
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FileSystem/OpenFileDescription.cpp
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FileSystem/OpenFileDescription.cpp
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FileSystem/Plan9FileSystem.cpp
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FileSystem/Plan9FileSystem.cpp
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FileSystem/ProcFS.cpp
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FileSystem/ProcFS/ComponentRegistry.cpp
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FileSystem/ProcFS/DirectoryInode.cpp
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FileSystem/ProcFS/FileSystem.cpp
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FileSystem/ProcFS/GlobalInode.cpp
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FileSystem/ProcFS/Inode.cpp
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FileSystem/ProcFS/LinkInode.cpp
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FileSystem/ProcFS/ProcessAssociatedInode.cpp
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FileSystem/ProcFS/ProcessDirectoryInode.cpp
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FileSystem/ProcFS/ProcessPropertyInode.cpp
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FileSystem/ProcFS/ProcessSubDirectoryInode.cpp
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FileSystem/SysFS/Component.cpp
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FileSystem/SysFS/Component.cpp
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FileSystem/SysFS/DirectoryInode.cpp
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FileSystem/SysFS/DirectoryInode.cpp
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FileSystem/SysFS/FileSystem.cpp
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FileSystem/SysFS/FileSystem.cpp
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@ -1,610 +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/API/POSIX/errno.h>
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#include <Kernel/Debug.h>
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#include <Kernel/FileSystem/Custody.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/FileSystem/ProcFS.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Heap/kmalloc.h>
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#include <Kernel/Process.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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ErrorOr<NonnullLockRefPtr<FileSystem>> ProcFS::try_create()
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{
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return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFS));
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}
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ProcFS::ProcFS() = default;
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ProcFS::~ProcFS() = default;
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ErrorOr<void> ProcFS::initialize()
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{
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m_root_inode = static_ptr_cast<ProcFSDirectoryInode>(TRY(ProcFSComponentRegistry::the().root_directory().to_inode(*this)));
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return {};
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}
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Inode& ProcFS::root_inode()
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{
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return *m_root_inode;
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}
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ProcFSInode::ProcFSInode(ProcFS const& fs, InodeIndex index)
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: Inode(const_cast<ProcFS&>(fs), index)
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{
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}
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ProcFSInode::~ProcFSInode() = default;
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ErrorOr<void> ProcFSInode::flush_metadata()
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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<NonnullLockRefPtr<ProcFSGlobalInode>> ProcFSGlobalInode::try_create(ProcFS const& fs, ProcFSExposedComponent const& component)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSGlobalInode(fs, component));
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}
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ProcFSGlobalInode::ProcFSGlobalInode(ProcFS const& fs, ProcFSExposedComponent const& component)
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: ProcFSInode(fs, component.component_index())
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, m_associated_component(component)
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{
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}
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void ProcFSGlobalInode::did_seek(OpenFileDescription& description, off_t new_offset)
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{
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if (new_offset != 0)
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return;
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auto result = m_associated_component->refresh_data(description);
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if (result.is_error()) {
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// Subsequent calls to read will return EIO!
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dbgln("ProcFS: Could not refresh contents: {}", result.error());
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}
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}
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ErrorOr<void> ProcFSGlobalInode::attach(OpenFileDescription& description)
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{
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return m_associated_component->refresh_data(description);
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}
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ErrorOr<size_t> ProcFSGlobalInode::read_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription* fd) const
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{
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return m_associated_component->read_bytes(offset, count, buffer, fd);
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}
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StringView ProcFSGlobalInode::name() const
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{
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return m_associated_component->name();
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}
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ErrorOr<void> ProcFSGlobalInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const
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{
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VERIFY_NOT_REACHED();
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}
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ErrorOr<NonnullLockRefPtr<Inode>> ProcFSGlobalInode::lookup(StringView)
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{
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VERIFY_NOT_REACHED();
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}
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ErrorOr<void> ProcFSGlobalInode::truncate(u64 size)
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{
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return m_associated_component->truncate(size);
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}
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ErrorOr<void> ProcFSGlobalInode::update_timestamps(Optional<time_t>, Optional<time_t>, Optional<time_t>)
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{
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return {};
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}
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InodeMetadata ProcFSGlobalInode::metadata() const
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{
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MutexLocker locker(m_inode_lock);
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InodeMetadata metadata;
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metadata.inode = { fsid(), m_associated_component->component_index() };
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metadata.mode = S_IFREG | m_associated_component->required_mode();
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metadata.uid = m_associated_component->owner_user();
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metadata.gid = m_associated_component->owner_group();
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metadata.size = 0;
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metadata.mtime = m_associated_component->modified_time();
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return metadata;
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}
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ErrorOr<size_t> ProcFSGlobalInode::write_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer const& buffer, OpenFileDescription* fd)
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{
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return m_associated_component->write_bytes(offset, count, buffer, fd);
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}
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ErrorOr<NonnullLockRefPtr<ProcFSDirectoryInode>> ProcFSDirectoryInode::try_create(ProcFS const& procfs, ProcFSExposedComponent const& component)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSDirectoryInode(procfs, component));
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}
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ProcFSDirectoryInode::ProcFSDirectoryInode(ProcFS const& fs, ProcFSExposedComponent const& component)
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: ProcFSGlobalInode(fs, component)
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{
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}
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ProcFSDirectoryInode::~ProcFSDirectoryInode() = default;
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InodeMetadata ProcFSDirectoryInode::metadata() const
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{
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MutexLocker locker(m_inode_lock);
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InodeMetadata metadata;
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metadata.inode = { fsid(), m_associated_component->component_index() };
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metadata.mode = S_IFDIR | m_associated_component->required_mode();
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metadata.uid = m_associated_component->owner_user();
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metadata.gid = m_associated_component->owner_group();
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metadata.size = 0;
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metadata.mtime = m_associated_component->modified_time();
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return metadata;
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}
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ErrorOr<void> ProcFSDirectoryInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
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{
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MutexLocker locker(procfs().m_lock);
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return m_associated_component->traverse_as_directory(procfs().fsid(), move(callback));
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}
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ErrorOr<NonnullLockRefPtr<Inode>> ProcFSDirectoryInode::lookup(StringView name)
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{
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MutexLocker locker(procfs().m_lock);
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auto component = TRY(m_associated_component->lookup(name));
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return component->to_inode(procfs());
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}
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ErrorOr<NonnullLockRefPtr<ProcFSLinkInode>> ProcFSLinkInode::try_create(ProcFS const& procfs, ProcFSExposedComponent const& component)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSLinkInode(procfs, component));
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}
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ProcFSLinkInode::ProcFSLinkInode(ProcFS const& fs, ProcFSExposedComponent const& component)
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: ProcFSGlobalInode(fs, component)
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{
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}
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InodeMetadata ProcFSLinkInode::metadata() const
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{
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MutexLocker locker(m_inode_lock);
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InodeMetadata metadata;
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metadata.inode = { fsid(), m_associated_component->component_index() };
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metadata.mode = S_IFLNK | m_associated_component->required_mode();
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metadata.uid = m_associated_component->owner_user();
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metadata.gid = m_associated_component->owner_group();
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metadata.size = 0;
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metadata.mtime = m_associated_component->modified_time();
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return metadata;
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}
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ProcFSProcessAssociatedInode::ProcFSProcessAssociatedInode(ProcFS const& fs, ProcessID associated_pid, InodeIndex determined_index)
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: ProcFSInode(fs, determined_index)
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, m_pid(associated_pid)
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{
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}
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ErrorOr<size_t> ProcFSProcessAssociatedInode::write_bytes_locked(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*)
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{
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return ENOTSUP;
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}
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ErrorOr<NonnullLockRefPtr<ProcFSProcessDirectoryInode>> ProcFSProcessDirectoryInode::try_create(ProcFS const& procfs, ProcessID pid)
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{
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return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessDirectoryInode(procfs, pid));
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}
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ProcFSProcessDirectoryInode::ProcFSProcessDirectoryInode(ProcFS const& procfs, ProcessID pid)
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: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_pid_directory(pid))
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{
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}
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ErrorOr<void> ProcFSProcessDirectoryInode::attach(OpenFileDescription&)
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{
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return {};
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}
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InodeMetadata ProcFSProcessDirectoryInode::metadata() const
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{
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MutexLocker locker(m_inode_lock);
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auto process = Process::from_pid_in_same_jail(associated_pid());
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if (!process)
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return {};
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auto traits = process->procfs_traits();
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InodeMetadata metadata;
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metadata.inode = { fsid(), traits->component_index() };
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metadata.mode = S_IFDIR | traits->required_mode();
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metadata.uid = traits->owner_user();
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metadata.gid = traits->owner_group();
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metadata.size = 0;
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metadata.mtime = traits->modified_time();
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return metadata;
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}
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ErrorOr<size_t> ProcFSProcessDirectoryInode::read_bytes_locked(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
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{
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VERIFY_NOT_REACHED();
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}
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ErrorOr<void> ProcFSProcessDirectoryInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
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{
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MutexLocker locker(procfs().m_lock);
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auto process = Process::from_pid_in_same_jail(associated_pid());
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if (!process)
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return EINVAL;
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return process->procfs_traits()->traverse_as_directory(procfs().fsid(), move(callback));
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}
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ErrorOr<NonnullLockRefPtr<Inode>> ProcFSProcessDirectoryInode::lookup(StringView name)
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{
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MutexLocker locker(procfs().m_lock);
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auto process = Process::from_pid_in_same_jail(associated_pid());
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if (!process)
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return ESRCH;
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if (name == "fd"sv)
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return TRY(ProcFSProcessSubDirectoryInode::try_create(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions, associated_pid()));
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if (name == "stacks"sv)
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return TRY(ProcFSProcessSubDirectoryInode::try_create(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::Stacks, associated_pid()));
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if (name == "children"sv)
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return TRY(ProcFSProcessSubDirectoryInode::try_create(procfs(), SegmentedProcFSIndex::ProcessSubDirectory::Children, associated_pid()));
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if (name == "unveil"sv)
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return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::Unveil, associated_pid()));
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if (name == "pledge"sv)
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return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::Pledge, associated_pid()));
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if (name == "fds"sv)
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return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::OpenFileDescriptions, associated_pid()));
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if (name == "exe"sv)
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return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::BinaryLink, associated_pid()));
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if (name == "cwd"sv)
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return TRY(ProcFSProcessPropertyInode::try_create_for_pid_property(procfs(), SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink, associated_pid()));
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if (name == "perf_events"sv)
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|
||||||
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;
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<NonnullLockRefPtr<ProcFSProcessSubDirectoryInode>> ProcFSProcessSubDirectoryInode::try_create(ProcFS const& procfs, SegmentedProcFSIndex::ProcessSubDirectory sub_directory_type, ProcessID pid)
|
|
||||||
{
|
|
||||||
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessSubDirectoryInode(procfs, sub_directory_type, pid));
|
|
||||||
}
|
|
||||||
|
|
||||||
ProcFSProcessSubDirectoryInode::ProcFSProcessSubDirectoryInode(ProcFS const& procfs, SegmentedProcFSIndex::ProcessSubDirectory sub_directory_type, ProcessID pid)
|
|
||||||
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_sub_directory(pid, sub_directory_type))
|
|
||||||
, m_sub_directory_type(sub_directory_type)
|
|
||||||
{
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<size_t> ProcFSProcessSubDirectoryInode::read_bytes_locked(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
|
|
||||||
{
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<void> ProcFSProcessSubDirectoryInode::attach(OpenFileDescription&)
|
|
||||||
{
|
|
||||||
return {};
|
|
||||||
}
|
|
||||||
|
|
||||||
void ProcFSProcessSubDirectoryInode::did_seek(OpenFileDescription&, off_t)
|
|
||||||
{
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
|
|
||||||
InodeMetadata ProcFSProcessSubDirectoryInode::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<void> ProcFSProcessSubDirectoryInode::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;
|
|
||||||
switch (m_sub_directory_type) {
|
|
||||||
case SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions:
|
|
||||||
return process->traverse_file_descriptions_directory(procfs().fsid(), move(callback));
|
|
||||||
case SegmentedProcFSIndex::ProcessSubDirectory::Stacks:
|
|
||||||
return process->traverse_stacks_directory(procfs().fsid(), move(callback));
|
|
||||||
case SegmentedProcFSIndex::ProcessSubDirectory::Children:
|
|
||||||
return process->traverse_children_directory(procfs().fsid(), move(callback));
|
|
||||||
default:
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSProcessSubDirectoryInode::lookup(StringView name)
|
|
||||||
{
|
|
||||||
MutexLocker locker(procfs().m_lock);
|
|
||||||
auto process = Process::from_pid_in_same_jail(associated_pid());
|
|
||||||
if (!process)
|
|
||||||
return ESRCH;
|
|
||||||
switch (m_sub_directory_type) {
|
|
||||||
case SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions:
|
|
||||||
return process->lookup_file_descriptions_directory(procfs(), name);
|
|
||||||
case SegmentedProcFSIndex::ProcessSubDirectory::Stacks:
|
|
||||||
return process->lookup_stacks_directory(procfs(), name);
|
|
||||||
case SegmentedProcFSIndex::ProcessSubDirectory::Children:
|
|
||||||
return process->lookup_children_directory(procfs(), name);
|
|
||||||
default:
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_file_description_link(ProcFS const& procfs, unsigned file_description_index, ProcessID pid)
|
|
||||||
{
|
|
||||||
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, file_description_index, pid));
|
|
||||||
}
|
|
||||||
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_thread_stack(ProcFS const& procfs, ThreadID stack_thread_index, ProcessID pid)
|
|
||||||
{
|
|
||||||
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, stack_thread_index, pid));
|
|
||||||
}
|
|
||||||
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_pid_property(ProcFS const& procfs, SegmentedProcFSIndex::MainProcessProperty main_property_type, ProcessID pid)
|
|
||||||
{
|
|
||||||
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, main_property_type, pid));
|
|
||||||
}
|
|
||||||
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_child_process_link(ProcFS const& procfs, ProcessID child_pid, ProcessID pid)
|
|
||||||
{
|
|
||||||
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, child_pid, pid));
|
|
||||||
}
|
|
||||||
|
|
||||||
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, SegmentedProcFSIndex::MainProcessProperty main_property_type, ProcessID pid)
|
|
||||||
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_main_property_in_pid_directory(pid, main_property_type))
|
|
||||||
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::Reserved)
|
|
||||||
{
|
|
||||||
m_possible_data.property_type = main_property_type;
|
|
||||||
}
|
|
||||||
|
|
||||||
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, unsigned file_description_index, ProcessID pid)
|
|
||||||
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_file_description(pid, file_description_index))
|
|
||||||
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions)
|
|
||||||
{
|
|
||||||
m_possible_data.property_index = file_description_index;
|
|
||||||
}
|
|
||||||
|
|
||||||
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, ThreadID thread_stack_index, ProcessID pid)
|
|
||||||
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_thread_stack(pid, thread_stack_index))
|
|
||||||
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::Stacks)
|
|
||||||
{
|
|
||||||
m_possible_data.property_index = thread_stack_index.value();
|
|
||||||
}
|
|
||||||
|
|
||||||
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, ProcessID child_pid, ProcessID pid)
|
|
||||||
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_children(pid, child_pid))
|
|
||||||
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::Children)
|
|
||||||
{
|
|
||||||
m_possible_data.property_index = child_pid.value();
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<void> ProcFSProcessPropertyInode::attach(OpenFileDescription& description)
|
|
||||||
{
|
|
||||||
return refresh_data(description);
|
|
||||||
}
|
|
||||||
void ProcFSProcessPropertyInode::did_seek(OpenFileDescription& description, off_t offset)
|
|
||||||
{
|
|
||||||
if (offset != 0)
|
|
||||||
return;
|
|
||||||
(void)refresh_data(description);
|
|
||||||
}
|
|
||||||
|
|
||||||
static mode_t determine_procfs_process_inode_mode(SegmentedProcFSIndex::ProcessSubDirectory parent_sub_directory_type, SegmentedProcFSIndex::MainProcessProperty main_property)
|
|
||||||
{
|
|
||||||
if (parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions)
|
|
||||||
return S_IFLNK | 0400;
|
|
||||||
if (parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Stacks)
|
|
||||||
return S_IFREG | 0400;
|
|
||||||
if (parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Children)
|
|
||||||
return S_IFLNK | 0400;
|
|
||||||
VERIFY(parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Reserved);
|
|
||||||
if (main_property == SegmentedProcFSIndex::MainProcessProperty::BinaryLink)
|
|
||||||
return S_IFLNK | 0777;
|
|
||||||
if (main_property == SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink)
|
|
||||||
return S_IFLNK | 0777;
|
|
||||||
return S_IFREG | 0400;
|
|
||||||
}
|
|
||||||
|
|
||||||
InodeMetadata ProcFSProcessPropertyInode::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 = determine_procfs_process_inode_mode(m_parent_sub_directory_type, m_possible_data.property_type);
|
|
||||||
metadata.uid = traits->owner_user();
|
|
||||||
metadata.gid = traits->owner_group();
|
|
||||||
metadata.size = 0;
|
|
||||||
metadata.mtime = traits->modified_time();
|
|
||||||
return metadata;
|
|
||||||
}
|
|
||||||
ErrorOr<void> ProcFSProcessPropertyInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const
|
|
||||||
{
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
ErrorOr<size_t> ProcFSProcessPropertyInode::read_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription* description) const
|
|
||||||
{
|
|
||||||
dbgln_if(PROCFS_DEBUG, "ProcFS ProcessInformation: read_bytes_locked offset: {} count: {}", offset, count);
|
|
||||||
|
|
||||||
VERIFY(offset >= 0);
|
|
||||||
VERIFY(buffer.user_or_kernel_ptr());
|
|
||||||
|
|
||||||
if (!description) {
|
|
||||||
auto builder = TRY(KBufferBuilder::try_create());
|
|
||||||
auto process = Process::from_pid_in_same_jail(associated_pid());
|
|
||||||
if (!process)
|
|
||||||
return Error::from_errno(ESRCH);
|
|
||||||
TRY(try_to_acquire_data(*process, builder));
|
|
||||||
auto data_buffer = builder.build();
|
|
||||||
if (!data_buffer)
|
|
||||||
return Error::from_errno(EFAULT);
|
|
||||||
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);
|
|
||||||
}
|
|
||||||
|
|
||||||
MutexLocker locker(m_refresh_lock);
|
|
||||||
|
|
||||||
auto& typed_cached_data = static_cast<ProcFSInodeData&>(*description->data());
|
|
||||||
auto& data_buffer = typed_cached_data.buffer;
|
|
||||||
|
|
||||||
if (!data_buffer || (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;
|
|
||||||
}
|
|
||||||
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSProcessPropertyInode::lookup(StringView)
|
|
||||||
{
|
|
||||||
return EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
static ErrorOr<void> build_from_cached_data(KBufferBuilder& builder, ProcFSInodeData& cached_data)
|
|
||||||
{
|
|
||||||
cached_data.buffer = builder.build();
|
|
||||||
if (!cached_data.buffer)
|
|
||||||
return ENOMEM;
|
|
||||||
return {};
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<void> ProcFSProcessPropertyInode::try_to_acquire_data(Process& process, KBufferBuilder& builder) const
|
|
||||||
{
|
|
||||||
// FIXME: Verify process is already ref-counted
|
|
||||||
if (m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions) {
|
|
||||||
TRY(process.procfs_get_file_description_link(m_possible_data.property_index, builder));
|
|
||||||
return {};
|
|
||||||
}
|
|
||||||
if (m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Stacks) {
|
|
||||||
TRY(process.procfs_get_thread_stack(m_possible_data.property_index, builder));
|
|
||||||
return {};
|
|
||||||
}
|
|
||||||
if (m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Children) {
|
|
||||||
TRY(process.procfs_get_child_proccess_link(m_possible_data.property_index, builder));
|
|
||||||
return {};
|
|
||||||
}
|
|
||||||
|
|
||||||
VERIFY(m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Reserved);
|
|
||||||
switch (m_possible_data.property_type) {
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::Unveil:
|
|
||||||
return process.procfs_get_unveil_stats(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::Pledge:
|
|
||||||
return process.procfs_get_pledge_stats(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::OpenFileDescriptions:
|
|
||||||
return process.procfs_get_fds_stats(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::BinaryLink:
|
|
||||||
return process.procfs_get_binary_link(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink:
|
|
||||||
return process.procfs_get_current_work_directory_link(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::PerformanceEvents:
|
|
||||||
return process.procfs_get_perf_events(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats:
|
|
||||||
return process.procfs_get_virtual_memory_stats(builder);
|
|
||||||
case SegmentedProcFSIndex::MainProcessProperty::CommandLine:
|
|
||||||
return process.procfs_get_command_line(builder);
|
|
||||||
default:
|
|
||||||
VERIFY_NOT_REACHED();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
ErrorOr<void> ProcFSProcessPropertyInode::refresh_data(OpenFileDescription& description)
|
|
||||||
{
|
|
||||||
// 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.
|
|
||||||
auto process = Process::from_pid_in_same_jail(associated_pid());
|
|
||||||
if (!process)
|
|
||||||
return Error::from_errno(ESRCH);
|
|
||||||
process->ptrace_lock().lock();
|
|
||||||
if (!process->is_dumpable()) {
|
|
||||||
process->ptrace_lock().unlock();
|
|
||||||
return EPERM;
|
|
||||||
}
|
|
||||||
ScopeGuard guard = [&] {
|
|
||||||
process->ptrace_lock().unlock();
|
|
||||||
};
|
|
||||||
MutexLocker locker(m_refresh_lock);
|
|
||||||
auto& cached_data = description.data();
|
|
||||||
if (!cached_data) {
|
|
||||||
cached_data = adopt_own_if_nonnull(new (nothrow) ProcFSInodeData);
|
|
||||||
if (!cached_data)
|
|
||||||
return ENOMEM;
|
|
||||||
}
|
|
||||||
auto builder = TRY(KBufferBuilder::try_create());
|
|
||||||
TRY(try_to_acquire_data(*process, builder));
|
|
||||||
return build_from_cached_data(builder, static_cast<ProcFSInodeData&>(*cached_data));
|
|
||||||
}
|
|
||||||
}
|
|
|
@ -1,201 +0,0 @@
|
||||||
/*
|
|
||||||
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
||||||
*
|
|
||||||
* SPDX-License-Identifier: BSD-2-Clause
|
|
||||||
*/
|
|
||||||
|
|
||||||
#pragma once
|
|
||||||
|
|
||||||
#include <AK/HashMap.h>
|
|
||||||
#include <AK/Types.h>
|
|
||||||
#include <Kernel/FileSystem/FileSystem.h>
|
|
||||||
#include <Kernel/FileSystem/Inode.h>
|
|
||||||
#include <Kernel/Forward.h>
|
|
||||||
#include <Kernel/KBufferBuilder.h>
|
|
||||||
#include <Kernel/Locking/Mutex.h>
|
|
||||||
#include <Kernel/ProcessExposed.h>
|
|
||||||
#include <Kernel/UnixTypes.h>
|
|
||||||
|
|
||||||
namespace Kernel {
|
|
||||||
|
|
||||||
class ProcFS final : public FileSystem {
|
|
||||||
friend class ProcFSInode;
|
|
||||||
friend class ProcFSDirectoryInode;
|
|
||||||
friend class ProcFSProcessDirectoryInode;
|
|
||||||
friend class ProcFSGlobalInode;
|
|
||||||
friend class ProcFSAssociatedProcessInode;
|
|
||||||
friend class ProcFSProcessSubDirectoryInode;
|
|
||||||
|
|
||||||
public:
|
|
||||||
virtual ~ProcFS() override;
|
|
||||||
static ErrorOr<NonnullLockRefPtr<FileSystem>> try_create();
|
|
||||||
|
|
||||||
virtual ErrorOr<void> initialize() override;
|
|
||||||
virtual StringView class_name() const override { return "ProcFS"sv; }
|
|
||||||
|
|
||||||
virtual Inode& root_inode() override;
|
|
||||||
|
|
||||||
private:
|
|
||||||
ProcFS();
|
|
||||||
|
|
||||||
LockRefPtr<ProcFSDirectoryInode> m_root_inode;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSInode : public Inode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
virtual ~ProcFSInode() override;
|
|
||||||
|
|
||||||
protected:
|
|
||||||
ProcFSInode(ProcFS const&, InodeIndex);
|
|
||||||
|
|
||||||
ProcFS& procfs() { return static_cast<ProcFS&>(Inode::fs()); }
|
|
||||||
ProcFS const& procfs() const { return static_cast<ProcFS const&>(Inode::fs()); }
|
|
||||||
|
|
||||||
// ^Inode
|
|
||||||
virtual ErrorOr<void> attach(OpenFileDescription& description) override = 0;
|
|
||||||
virtual void did_seek(OpenFileDescription&, off_t) override = 0;
|
|
||||||
virtual ErrorOr<void> flush_metadata() override final;
|
|
||||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override final;
|
|
||||||
virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override final;
|
|
||||||
virtual ErrorOr<void> remove_child(StringView name) override final;
|
|
||||||
virtual ErrorOr<void> chmod(mode_t) override final;
|
|
||||||
virtual ErrorOr<void> chown(UserID, GroupID) override final;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSGlobalInode : public ProcFSInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSGlobalInode>> try_create(ProcFS const&, ProcFSExposedComponent const&);
|
|
||||||
virtual ~ProcFSGlobalInode() override {};
|
|
||||||
StringView name() const;
|
|
||||||
|
|
||||||
protected:
|
|
||||||
ProcFSGlobalInode(ProcFS const&, ProcFSExposedComponent const&);
|
|
||||||
|
|
||||||
// ^Inode
|
|
||||||
virtual ErrorOr<void> attach(OpenFileDescription& description) override final;
|
|
||||||
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
|
||||||
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override final;
|
|
||||||
virtual void did_seek(OpenFileDescription&, off_t) override final;
|
|
||||||
virtual InodeMetadata metadata() const override;
|
|
||||||
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
|
||||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView) override;
|
|
||||||
virtual ErrorOr<void> truncate(u64) override final;
|
|
||||||
virtual ErrorOr<void> update_timestamps(Optional<time_t> atime, Optional<time_t> ctime, Optional<time_t> mtime) override;
|
|
||||||
|
|
||||||
NonnullLockRefPtr<ProcFSExposedComponent> m_associated_component;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSLinkInode : public ProcFSGlobalInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSLinkInode>> try_create(ProcFS const&, ProcFSExposedComponent const&);
|
|
||||||
|
|
||||||
protected:
|
|
||||||
ProcFSLinkInode(ProcFS const&, ProcFSExposedComponent const&);
|
|
||||||
virtual InodeMetadata metadata() const override;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSDirectoryInode final : public ProcFSGlobalInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSDirectoryInode>> try_create(ProcFS const&, ProcFSExposedComponent const&);
|
|
||||||
virtual ~ProcFSDirectoryInode() override;
|
|
||||||
|
|
||||||
protected:
|
|
||||||
ProcFSDirectoryInode(ProcFS const&, ProcFSExposedComponent const&);
|
|
||||||
// ^Inode
|
|
||||||
virtual InodeMetadata metadata() const override;
|
|
||||||
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
|
||||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSProcessAssociatedInode : public ProcFSInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
protected:
|
|
||||||
ProcFSProcessAssociatedInode(ProcFS const&, ProcessID, InodeIndex);
|
|
||||||
ProcessID associated_pid() const { return m_pid; }
|
|
||||||
|
|
||||||
// ^Inode
|
|
||||||
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override final;
|
|
||||||
|
|
||||||
private:
|
|
||||||
const ProcessID m_pid;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSProcessDirectoryInode final : public ProcFSProcessAssociatedInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSProcessDirectoryInode>> try_create(ProcFS const&, ProcessID);
|
|
||||||
|
|
||||||
private:
|
|
||||||
ProcFSProcessDirectoryInode(ProcFS const&, ProcessID);
|
|
||||||
// ^Inode
|
|
||||||
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
|
||||||
virtual void did_seek(OpenFileDescription&, off_t) override { }
|
|
||||||
virtual InodeMetadata metadata() const override;
|
|
||||||
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
|
||||||
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
|
||||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSProcessSubDirectoryInode final : public ProcFSProcessAssociatedInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSProcessSubDirectoryInode>> try_create(ProcFS const&, SegmentedProcFSIndex::ProcessSubDirectory, ProcessID);
|
|
||||||
|
|
||||||
private:
|
|
||||||
ProcFSProcessSubDirectoryInode(ProcFS const&, SegmentedProcFSIndex::ProcessSubDirectory, ProcessID);
|
|
||||||
// ^Inode
|
|
||||||
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
|
||||||
virtual void did_seek(OpenFileDescription&, off_t) override;
|
|
||||||
virtual InodeMetadata metadata() const override;
|
|
||||||
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
|
||||||
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
|
||||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
|
|
||||||
|
|
||||||
const SegmentedProcFSIndex::ProcessSubDirectory m_sub_directory_type;
|
|
||||||
};
|
|
||||||
|
|
||||||
class ProcFSProcessPropertyInode final : public ProcFSProcessAssociatedInode {
|
|
||||||
friend class ProcFS;
|
|
||||||
|
|
||||||
public:
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_file_description_link(ProcFS const&, unsigned, ProcessID);
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_thread_stack(ProcFS const&, ThreadID, ProcessID);
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_pid_property(ProcFS const&, SegmentedProcFSIndex::MainProcessProperty, ProcessID);
|
|
||||||
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_child_process_link(ProcFS const&, ProcessID, ProcessID);
|
|
||||||
|
|
||||||
private:
|
|
||||||
ProcFSProcessPropertyInode(ProcFS const&, SegmentedProcFSIndex::MainProcessProperty, ProcessID);
|
|
||||||
ProcFSProcessPropertyInode(ProcFS const&, ThreadID, ProcessID);
|
|
||||||
ProcFSProcessPropertyInode(ProcFS const&, unsigned, ProcessID);
|
|
||||||
ProcFSProcessPropertyInode(ProcFS const&, ProcessID, ProcessID);
|
|
||||||
|
|
||||||
// ^Inode
|
|
||||||
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
|
||||||
virtual void did_seek(OpenFileDescription&, off_t) override;
|
|
||||||
virtual InodeMetadata metadata() const override;
|
|
||||||
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
|
||||||
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
|
||||||
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override final;
|
|
||||||
|
|
||||||
ErrorOr<void> refresh_data(OpenFileDescription& description);
|
|
||||||
ErrorOr<void> try_to_acquire_data(Process& process, KBufferBuilder& builder) const;
|
|
||||||
|
|
||||||
const SegmentedProcFSIndex::ProcessSubDirectory m_parent_sub_directory_type;
|
|
||||||
union {
|
|
||||||
SegmentedProcFSIndex::MainProcessProperty property_type;
|
|
||||||
unsigned property_index;
|
|
||||||
} m_possible_data;
|
|
||||||
mutable Mutex m_refresh_lock;
|
|
||||||
};
|
|
||||||
}
|
|
33
Kernel/FileSystem/ProcFS/ComponentRegistry.cpp
Normal file
33
Kernel/FileSystem/ProcFS/ComponentRegistry.cpp
Normal file
|
@ -0,0 +1,33 @@
|
||||||
|
/*
|
||||||
|
* 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 <AK/Singleton.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
#include <Kernel/Sections.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
static Singleton<ProcFSComponentRegistry> s_the;
|
||||||
|
|
||||||
|
ProcFSComponentRegistry& ProcFSComponentRegistry::the()
|
||||||
|
{
|
||||||
|
return *s_the;
|
||||||
|
}
|
||||||
|
|
||||||
|
UNMAP_AFTER_INIT void ProcFSComponentRegistry::initialize()
|
||||||
|
{
|
||||||
|
VERIFY(!s_the.is_initialized());
|
||||||
|
s_the.ensure_instance();
|
||||||
|
}
|
||||||
|
|
||||||
|
UNMAP_AFTER_INIT ProcFSComponentRegistry::ProcFSComponentRegistry()
|
||||||
|
: m_root_directory(ProcFSRootDirectory::must_create())
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
51
Kernel/FileSystem/ProcFS/DirectoryInode.cpp
Normal file
51
Kernel/FileSystem/ProcFS/DirectoryInode.cpp
Normal file
|
@ -0,0 +1,51 @@
|
||||||
|
/*
|
||||||
|
* 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/DirectoryInode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSDirectoryInode>> ProcFSDirectoryInode::try_create(ProcFS const& procfs, ProcFSExposedComponent const& component)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSDirectoryInode(procfs, component));
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSDirectoryInode::ProcFSDirectoryInode(ProcFS const& fs, ProcFSExposedComponent const& component)
|
||||||
|
: ProcFSGlobalInode(fs, component)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSDirectoryInode::~ProcFSDirectoryInode() = default;
|
||||||
|
|
||||||
|
InodeMetadata ProcFSDirectoryInode::metadata() const
|
||||||
|
{
|
||||||
|
MutexLocker locker(m_inode_lock);
|
||||||
|
InodeMetadata metadata;
|
||||||
|
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();
|
||||||
|
metadata.size = 0;
|
||||||
|
metadata.mtime = m_associated_component->modified_time();
|
||||||
|
return metadata;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSDirectoryInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
|
||||||
|
{
|
||||||
|
MutexLocker locker(procfs().m_lock);
|
||||||
|
return m_associated_component->traverse_as_directory(procfs().fsid(), move(callback));
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSDirectoryInode::lookup(StringView name)
|
||||||
|
{
|
||||||
|
MutexLocker locker(procfs().m_lock);
|
||||||
|
auto component = TRY(m_associated_component->lookup(name));
|
||||||
|
return component->to_inode(procfs());
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
28
Kernel/FileSystem/ProcFS/DirectoryInode.h
Normal file
28
Kernel/FileSystem/ProcFS/DirectoryInode.h
Normal file
|
@ -0,0 +1,28 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/GlobalInode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSDirectoryInode final : public ProcFSGlobalInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSDirectoryInode>> try_create(ProcFS const&, ProcFSExposedComponent const&);
|
||||||
|
virtual ~ProcFSDirectoryInode() override;
|
||||||
|
|
||||||
|
protected:
|
||||||
|
ProcFSDirectoryInode(ProcFS const&, ProcFSExposedComponent const&);
|
||||||
|
// ^Inode
|
||||||
|
virtual InodeMetadata metadata() const override;
|
||||||
|
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
||||||
|
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
34
Kernel/FileSystem/ProcFS/FileSystem.cpp
Normal file
34
Kernel/FileSystem/ProcFS/FileSystem.cpp
Normal file
|
@ -0,0 +1,34 @@
|
||||||
|
/*
|
||||||
|
* 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/DirectoryInode.h>
|
||||||
|
#include <Kernel/FileSystem/ProcFS/FileSystem.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<FileSystem>> ProcFS::try_create()
|
||||||
|
{
|
||||||
|
return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFS));
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFS::ProcFS() = default;
|
||||||
|
ProcFS::~ProcFS() = default;
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFS::initialize()
|
||||||
|
{
|
||||||
|
m_root_inode = static_ptr_cast<ProcFSDirectoryInode>(TRY(ProcFSComponentRegistry::the().root_directory().to_inode(*this)));
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
Inode& ProcFS::root_inode()
|
||||||
|
{
|
||||||
|
return *m_root_inode;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
45
Kernel/FileSystem/ProcFS/FileSystem.h
Normal file
45
Kernel/FileSystem/ProcFS/FileSystem.h
Normal file
|
@ -0,0 +1,45 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <AK/Types.h>
|
||||||
|
#include <Kernel/FileSystem/FileSystem.h>
|
||||||
|
#include <Kernel/FileSystem/Inode.h>
|
||||||
|
#include <Kernel/Forward.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSInode;
|
||||||
|
class ProcFSProcessDirectoryInode;
|
||||||
|
class ProcFSGlobalInode;
|
||||||
|
class ProcFSAssociatedProcessInode;
|
||||||
|
class ProcFSProcessSubDirectoryInode;
|
||||||
|
|
||||||
|
class ProcFS final : public FileSystem {
|
||||||
|
friend class ProcFSInode;
|
||||||
|
friend class ProcFSDirectoryInode;
|
||||||
|
friend class ProcFSProcessDirectoryInode;
|
||||||
|
friend class ProcFSGlobalInode;
|
||||||
|
friend class ProcFSAssociatedProcessInode;
|
||||||
|
friend class ProcFSProcessSubDirectoryInode;
|
||||||
|
|
||||||
|
public:
|
||||||
|
virtual ~ProcFS() override;
|
||||||
|
static ErrorOr<NonnullLockRefPtr<FileSystem>> try_create();
|
||||||
|
|
||||||
|
virtual ErrorOr<void> initialize() override;
|
||||||
|
virtual StringView class_name() const override { return "ProcFS"sv; }
|
||||||
|
|
||||||
|
virtual Inode& root_inode() override;
|
||||||
|
|
||||||
|
private:
|
||||||
|
ProcFS();
|
||||||
|
|
||||||
|
LockRefPtr<ProcFSDirectoryInode> m_root_inode;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
88
Kernel/FileSystem/ProcFS/GlobalInode.cpp
Normal file
88
Kernel/FileSystem/ProcFS/GlobalInode.cpp
Normal file
|
@ -0,0 +1,88 @@
|
||||||
|
/*
|
||||||
|
* 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/GlobalInode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSGlobalInode>> ProcFSGlobalInode::try_create(ProcFS const& fs, ProcFSExposedComponent const& component)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSGlobalInode(fs, component));
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSGlobalInode::ProcFSGlobalInode(ProcFS const& fs, ProcFSExposedComponent const& component)
|
||||||
|
: ProcFSInode(fs, component.component_index())
|
||||||
|
, m_associated_component(component)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
void ProcFSGlobalInode::did_seek(OpenFileDescription& description, off_t new_offset)
|
||||||
|
{
|
||||||
|
if (new_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());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSGlobalInode::attach(OpenFileDescription& description)
|
||||||
|
{
|
||||||
|
return m_associated_component->refresh_data(description);
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<size_t> ProcFSGlobalInode::read_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription* fd) const
|
||||||
|
{
|
||||||
|
return m_associated_component->read_bytes(offset, count, buffer, fd);
|
||||||
|
}
|
||||||
|
|
||||||
|
StringView ProcFSGlobalInode::name() const
|
||||||
|
{
|
||||||
|
return m_associated_component->name();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSGlobalInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const
|
||||||
|
{
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSGlobalInode::lookup(StringView)
|
||||||
|
{
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSGlobalInode::truncate(u64 size)
|
||||||
|
{
|
||||||
|
return m_associated_component->truncate(size);
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSGlobalInode::update_timestamps(Optional<time_t>, Optional<time_t>, Optional<time_t>)
|
||||||
|
{
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
InodeMetadata ProcFSGlobalInode::metadata() const
|
||||||
|
{
|
||||||
|
MutexLocker locker(m_inode_lock);
|
||||||
|
InodeMetadata metadata;
|
||||||
|
metadata.inode = { fsid(), m_associated_component->component_index() };
|
||||||
|
metadata.mode = S_IFREG | m_associated_component->required_mode();
|
||||||
|
metadata.uid = m_associated_component->owner_user();
|
||||||
|
metadata.gid = m_associated_component->owner_group();
|
||||||
|
metadata.size = 0;
|
||||||
|
metadata.mtime = m_associated_component->modified_time();
|
||||||
|
return metadata;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<size_t> ProcFSGlobalInode::write_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer const& buffer, OpenFileDescription* fd)
|
||||||
|
{
|
||||||
|
return m_associated_component->write_bytes(offset, count, buffer, fd);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
40
Kernel/FileSystem/ProcFS/GlobalInode.h
Normal file
40
Kernel/FileSystem/ProcFS/GlobalInode.h
Normal file
|
@ -0,0 +1,40 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/FileSystem.h>
|
||||||
|
#include <Kernel/FileSystem/ProcFS/Inode.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSGlobalInode : public ProcFSInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSGlobalInode>> try_create(ProcFS const&, ProcFSExposedComponent const&);
|
||||||
|
virtual ~ProcFSGlobalInode() override {};
|
||||||
|
StringView name() const;
|
||||||
|
|
||||||
|
protected:
|
||||||
|
ProcFSGlobalInode(ProcFS const&, ProcFSExposedComponent const&);
|
||||||
|
|
||||||
|
// ^Inode
|
||||||
|
virtual ErrorOr<void> attach(OpenFileDescription& description) override final;
|
||||||
|
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
||||||
|
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override final;
|
||||||
|
virtual void did_seek(OpenFileDescription&, off_t) override final;
|
||||||
|
virtual InodeMetadata metadata() const override;
|
||||||
|
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
||||||
|
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView) override;
|
||||||
|
virtual ErrorOr<void> truncate(u64) override final;
|
||||||
|
virtual ErrorOr<void> update_timestamps(Optional<time_t> atime, Optional<time_t> ctime, Optional<time_t> mtime) override;
|
||||||
|
|
||||||
|
NonnullLockRefPtr<ProcFSExposedComponent> m_associated_component;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
50
Kernel/FileSystem/ProcFS/Inode.cpp
Normal file
50
Kernel/FileSystem/ProcFS/Inode.cpp
Normal file
|
@ -0,0 +1,50 @@
|
||||||
|
/*
|
||||||
|
* 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/Inode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ProcFSInode::ProcFSInode(ProcFS const& fs, InodeIndex index)
|
||||||
|
: Inode(const_cast<ProcFS&>(fs), index)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSInode::~ProcFSInode() = default;
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSInode::flush_metadata()
|
||||||
|
{
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSInode::add_child(Inode&, StringView, mode_t)
|
||||||
|
{
|
||||||
|
return EROFS;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSInode::create_child(StringView, mode_t, dev_t, UserID, GroupID)
|
||||||
|
{
|
||||||
|
return EROFS;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSInode::remove_child(StringView)
|
||||||
|
{
|
||||||
|
return EROFS;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSInode::chmod(mode_t)
|
||||||
|
{
|
||||||
|
return EPERM;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSInode::chown(UserID, GroupID)
|
||||||
|
{
|
||||||
|
return EPERM;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
40
Kernel/FileSystem/ProcFS/Inode.h
Normal file
40
Kernel/FileSystem/ProcFS/Inode.h
Normal file
|
@ -0,0 +1,40 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/Inode.h>
|
||||||
|
#include <Kernel/FileSystem/OpenFileDescription.h>
|
||||||
|
#include <Kernel/FileSystem/ProcFS/FileSystem.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
#include <Kernel/UnixTypes.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSInode : public Inode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
virtual ~ProcFSInode() override;
|
||||||
|
|
||||||
|
protected:
|
||||||
|
ProcFSInode(ProcFS const&, InodeIndex);
|
||||||
|
|
||||||
|
ProcFS& procfs() { return static_cast<ProcFS&>(Inode::fs()); }
|
||||||
|
ProcFS const& procfs() const { return static_cast<ProcFS const&>(Inode::fs()); }
|
||||||
|
|
||||||
|
// ^Inode
|
||||||
|
virtual ErrorOr<void> attach(OpenFileDescription& description) override = 0;
|
||||||
|
virtual void did_seek(OpenFileDescription&, off_t) override = 0;
|
||||||
|
virtual ErrorOr<void> flush_metadata() override final;
|
||||||
|
virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override final;
|
||||||
|
virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override final;
|
||||||
|
virtual ErrorOr<void> remove_child(StringView name) override final;
|
||||||
|
virtual ErrorOr<void> chmod(mode_t) override final;
|
||||||
|
virtual ErrorOr<void> chown(UserID, GroupID) override final;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
36
Kernel/FileSystem/ProcFS/LinkInode.cpp
Normal file
36
Kernel/FileSystem/ProcFS/LinkInode.cpp
Normal file
|
@ -0,0 +1,36 @@
|
||||||
|
/*
|
||||||
|
* 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/LinkInode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSLinkInode>> ProcFSLinkInode::try_create(ProcFS const& procfs, ProcFSExposedComponent const& component)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSLinkInode(procfs, component));
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSLinkInode::ProcFSLinkInode(ProcFS const& fs, ProcFSExposedComponent const& component)
|
||||||
|
: ProcFSGlobalInode(fs, component)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
InodeMetadata ProcFSLinkInode::metadata() const
|
||||||
|
{
|
||||||
|
MutexLocker locker(m_inode_lock);
|
||||||
|
InodeMetadata metadata;
|
||||||
|
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();
|
||||||
|
metadata.size = 0;
|
||||||
|
metadata.mtime = m_associated_component->modified_time();
|
||||||
|
return metadata;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
24
Kernel/FileSystem/ProcFS/LinkInode.h
Normal file
24
Kernel/FileSystem/ProcFS/LinkInode.h
Normal file
|
@ -0,0 +1,24 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/GlobalInode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSLinkInode : public ProcFSGlobalInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSLinkInode>> try_create(ProcFS const&, ProcFSExposedComponent const&);
|
||||||
|
|
||||||
|
protected:
|
||||||
|
ProcFSLinkInode(ProcFS const&, ProcFSExposedComponent const&);
|
||||||
|
virtual InodeMetadata metadata() const override;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
24
Kernel/FileSystem/ProcFS/ProcessAssociatedInode.cpp
Normal file
24
Kernel/FileSystem/ProcFS/ProcessAssociatedInode.cpp
Normal file
|
@ -0,0 +1,24 @@
|
||||||
|
/*
|
||||||
|
* 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/ProcessAssociatedInode.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ProcFSProcessAssociatedInode::ProcFSProcessAssociatedInode(ProcFS const& fs, ProcessID associated_pid, InodeIndex determined_index)
|
||||||
|
: ProcFSInode(fs, determined_index)
|
||||||
|
, m_pid(associated_pid)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<size_t> ProcFSProcessAssociatedInode::write_bytes_locked(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*)
|
||||||
|
{
|
||||||
|
return ENOTSUP;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
28
Kernel/FileSystem/ProcFS/ProcessAssociatedInode.h
Normal file
28
Kernel/FileSystem/ProcFS/ProcessAssociatedInode.h
Normal file
|
@ -0,0 +1,28 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/Inode.h>
|
||||||
|
#include <Kernel/Forward.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSProcessAssociatedInode : public ProcFSInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
protected:
|
||||||
|
ProcFSProcessAssociatedInode(ProcFS const&, ProcessID, InodeIndex);
|
||||||
|
ProcessID associated_pid() const { return m_pid; }
|
||||||
|
|
||||||
|
// ^Inode
|
||||||
|
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override final;
|
||||||
|
|
||||||
|
private:
|
||||||
|
const ProcessID m_pid;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
95
Kernel/FileSystem/ProcFS/ProcessDirectoryInode.cpp
Normal file
95
Kernel/FileSystem/ProcFS/ProcessDirectoryInode.cpp
Normal file
|
@ -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;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
31
Kernel/FileSystem/ProcFS/ProcessDirectoryInode.h
Normal file
31
Kernel/FileSystem/ProcFS/ProcessDirectoryInode.h
Normal file
|
@ -0,0 +1,31 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/ProcessAssociatedInode.h>
|
||||||
|
#include <Kernel/Forward.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSProcessDirectoryInode final : public ProcFSProcessAssociatedInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSProcessDirectoryInode>> try_create(ProcFS const&, ProcessID);
|
||||||
|
|
||||||
|
private:
|
||||||
|
ProcFSProcessDirectoryInode(ProcFS const&, ProcessID);
|
||||||
|
// ^Inode
|
||||||
|
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
||||||
|
virtual void did_seek(OpenFileDescription&, off_t) override { }
|
||||||
|
virtual InodeMetadata metadata() const override;
|
||||||
|
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
||||||
|
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
||||||
|
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
236
Kernel/FileSystem/ProcFS/ProcessPropertyInode.cpp
Normal file
236
Kernel/FileSystem/ProcFS/ProcessPropertyInode.cpp
Normal file
|
@ -0,0 +1,236 @@
|
||||||
|
/*
|
||||||
|
* 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/API/POSIX/errno.h>
|
||||||
|
#include <Kernel/Debug.h>
|
||||||
|
#include <Kernel/FileSystem/OpenFileDescription.h>
|
||||||
|
#include <Kernel/FileSystem/ProcFS/ProcessPropertyInode.h>
|
||||||
|
#include <Kernel/Process.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_file_description_link(ProcFS const& procfs, unsigned file_description_index, ProcessID pid)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, file_description_index, pid));
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_thread_stack(ProcFS const& procfs, ThreadID stack_thread_index, ProcessID pid)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, stack_thread_index, pid));
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_pid_property(ProcFS const& procfs, SegmentedProcFSIndex::MainProcessProperty main_property_type, ProcessID pid)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, main_property_type, pid));
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> ProcFSProcessPropertyInode::try_create_for_child_process_link(ProcFS const& procfs, ProcessID child_pid, ProcessID pid)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessPropertyInode(procfs, child_pid, pid));
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, SegmentedProcFSIndex::MainProcessProperty main_property_type, ProcessID pid)
|
||||||
|
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_main_property_in_pid_directory(pid, main_property_type))
|
||||||
|
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::Reserved)
|
||||||
|
{
|
||||||
|
m_possible_data.property_type = main_property_type;
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, unsigned file_description_index, ProcessID pid)
|
||||||
|
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_file_description(pid, file_description_index))
|
||||||
|
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions)
|
||||||
|
{
|
||||||
|
m_possible_data.property_index = file_description_index;
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, ThreadID thread_stack_index, ProcessID pid)
|
||||||
|
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_thread_stack(pid, thread_stack_index))
|
||||||
|
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::Stacks)
|
||||||
|
{
|
||||||
|
m_possible_data.property_index = thread_stack_index.value();
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSProcessPropertyInode::ProcFSProcessPropertyInode(ProcFS const& procfs, ProcessID child_pid, ProcessID pid)
|
||||||
|
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_children(pid, child_pid))
|
||||||
|
, m_parent_sub_directory_type(SegmentedProcFSIndex::ProcessSubDirectory::Children)
|
||||||
|
{
|
||||||
|
m_possible_data.property_index = child_pid.value();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSProcessPropertyInode::attach(OpenFileDescription& description)
|
||||||
|
{
|
||||||
|
return refresh_data(description);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ProcFSProcessPropertyInode::did_seek(OpenFileDescription& description, off_t offset)
|
||||||
|
{
|
||||||
|
if (offset != 0)
|
||||||
|
return;
|
||||||
|
(void)refresh_data(description);
|
||||||
|
}
|
||||||
|
|
||||||
|
static mode_t determine_procfs_process_inode_mode(SegmentedProcFSIndex::ProcessSubDirectory parent_sub_directory_type, SegmentedProcFSIndex::MainProcessProperty main_property)
|
||||||
|
{
|
||||||
|
if (parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions)
|
||||||
|
return S_IFLNK | 0400;
|
||||||
|
if (parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Stacks)
|
||||||
|
return S_IFREG | 0400;
|
||||||
|
if (parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Children)
|
||||||
|
return S_IFLNK | 0400;
|
||||||
|
VERIFY(parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Reserved);
|
||||||
|
if (main_property == SegmentedProcFSIndex::MainProcessProperty::BinaryLink)
|
||||||
|
return S_IFLNK | 0777;
|
||||||
|
if (main_property == SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink)
|
||||||
|
return S_IFLNK | 0777;
|
||||||
|
return S_IFREG | 0400;
|
||||||
|
}
|
||||||
|
|
||||||
|
InodeMetadata ProcFSProcessPropertyInode::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 = determine_procfs_process_inode_mode(m_parent_sub_directory_type, m_possible_data.property_type);
|
||||||
|
metadata.uid = traits->owner_user();
|
||||||
|
metadata.gid = traits->owner_group();
|
||||||
|
metadata.size = 0;
|
||||||
|
metadata.mtime = traits->modified_time();
|
||||||
|
return metadata;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSProcessPropertyInode::traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const
|
||||||
|
{
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<size_t> ProcFSProcessPropertyInode::read_bytes_locked(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription* description) const
|
||||||
|
{
|
||||||
|
dbgln_if(PROCFS_DEBUG, "ProcFS ProcessInformation: read_bytes_locked offset: {} count: {}", offset, count);
|
||||||
|
|
||||||
|
VERIFY(offset >= 0);
|
||||||
|
VERIFY(buffer.user_or_kernel_ptr());
|
||||||
|
|
||||||
|
if (!description) {
|
||||||
|
auto builder = TRY(KBufferBuilder::try_create());
|
||||||
|
auto process = Process::from_pid_in_same_jail(associated_pid());
|
||||||
|
if (!process)
|
||||||
|
return Error::from_errno(ESRCH);
|
||||||
|
TRY(try_to_acquire_data(*process, builder));
|
||||||
|
auto data_buffer = builder.build();
|
||||||
|
if (!data_buffer)
|
||||||
|
return Error::from_errno(EFAULT);
|
||||||
|
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);
|
||||||
|
}
|
||||||
|
|
||||||
|
MutexLocker locker(m_refresh_lock);
|
||||||
|
|
||||||
|
auto& typed_cached_data = static_cast<ProcFSInodeData&>(*description->data());
|
||||||
|
auto& data_buffer = typed_cached_data.buffer;
|
||||||
|
|
||||||
|
if (!data_buffer || (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;
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSProcessPropertyInode::lookup(StringView)
|
||||||
|
{
|
||||||
|
return EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ErrorOr<void> build_from_cached_data(KBufferBuilder& builder, ProcFSInodeData& cached_data)
|
||||||
|
{
|
||||||
|
cached_data.buffer = builder.build();
|
||||||
|
if (!cached_data.buffer)
|
||||||
|
return ENOMEM;
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSProcessPropertyInode::try_to_acquire_data(Process& process, KBufferBuilder& builder) const
|
||||||
|
{
|
||||||
|
// FIXME: Verify process is already ref-counted
|
||||||
|
if (m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions) {
|
||||||
|
TRY(process.procfs_get_file_description_link(m_possible_data.property_index, builder));
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
if (m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Stacks) {
|
||||||
|
TRY(process.procfs_get_thread_stack(m_possible_data.property_index, builder));
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
if (m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Children) {
|
||||||
|
TRY(process.procfs_get_child_proccess_link(m_possible_data.property_index, builder));
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
VERIFY(m_parent_sub_directory_type == SegmentedProcFSIndex::ProcessSubDirectory::Reserved);
|
||||||
|
switch (m_possible_data.property_type) {
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::Unveil:
|
||||||
|
return process.procfs_get_unveil_stats(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::Pledge:
|
||||||
|
return process.procfs_get_pledge_stats(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::OpenFileDescriptions:
|
||||||
|
return process.procfs_get_fds_stats(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::BinaryLink:
|
||||||
|
return process.procfs_get_binary_link(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::CurrentWorkDirectoryLink:
|
||||||
|
return process.procfs_get_current_work_directory_link(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::PerformanceEvents:
|
||||||
|
return process.procfs_get_perf_events(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::VirtualMemoryStats:
|
||||||
|
return process.procfs_get_virtual_memory_stats(builder);
|
||||||
|
case SegmentedProcFSIndex::MainProcessProperty::CommandLine:
|
||||||
|
return process.procfs_get_command_line(builder);
|
||||||
|
default:
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSProcessPropertyInode::refresh_data(OpenFileDescription& description)
|
||||||
|
{
|
||||||
|
// 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.
|
||||||
|
auto process = Process::from_pid_in_same_jail(associated_pid());
|
||||||
|
if (!process)
|
||||||
|
return Error::from_errno(ESRCH);
|
||||||
|
process->ptrace_lock().lock();
|
||||||
|
if (!process->is_dumpable()) {
|
||||||
|
process->ptrace_lock().unlock();
|
||||||
|
return EPERM;
|
||||||
|
}
|
||||||
|
ScopeGuard guard = [&] {
|
||||||
|
process->ptrace_lock().unlock();
|
||||||
|
};
|
||||||
|
MutexLocker locker(m_refresh_lock);
|
||||||
|
auto& cached_data = description.data();
|
||||||
|
if (!cached_data) {
|
||||||
|
cached_data = adopt_own_if_nonnull(new (nothrow) ProcFSInodeData);
|
||||||
|
if (!cached_data)
|
||||||
|
return ENOMEM;
|
||||||
|
}
|
||||||
|
auto builder = TRY(KBufferBuilder::try_create());
|
||||||
|
TRY(try_to_acquire_data(*process, builder));
|
||||||
|
return build_from_cached_data(builder, static_cast<ProcFSInodeData&>(*cached_data));
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
51
Kernel/FileSystem/ProcFS/ProcessPropertyInode.h
Normal file
51
Kernel/FileSystem/ProcFS/ProcessPropertyInode.h
Normal file
|
@ -0,0 +1,51 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/ProcessAssociatedInode.h>
|
||||||
|
#include <Kernel/Forward.h>
|
||||||
|
#include <Kernel/KBufferBuilder.h>
|
||||||
|
#include <Kernel/Locking/Mutex.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
#include <Kernel/UnixTypes.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSProcessPropertyInode final : public ProcFSProcessAssociatedInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_file_description_link(ProcFS const&, unsigned, ProcessID);
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_thread_stack(ProcFS const&, ThreadID, ProcessID);
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_pid_property(ProcFS const&, SegmentedProcFSIndex::MainProcessProperty, ProcessID);
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSProcessPropertyInode>> try_create_for_child_process_link(ProcFS const&, ProcessID, ProcessID);
|
||||||
|
|
||||||
|
private:
|
||||||
|
ProcFSProcessPropertyInode(ProcFS const&, SegmentedProcFSIndex::MainProcessProperty, ProcessID);
|
||||||
|
ProcFSProcessPropertyInode(ProcFS const&, ThreadID, ProcessID);
|
||||||
|
ProcFSProcessPropertyInode(ProcFS const&, unsigned, ProcessID);
|
||||||
|
ProcFSProcessPropertyInode(ProcFS const&, ProcessID, ProcessID);
|
||||||
|
|
||||||
|
// ^Inode
|
||||||
|
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
||||||
|
virtual void did_seek(OpenFileDescription&, off_t) override;
|
||||||
|
virtual InodeMetadata metadata() const override;
|
||||||
|
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
||||||
|
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
||||||
|
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override final;
|
||||||
|
|
||||||
|
ErrorOr<void> refresh_data(OpenFileDescription& description);
|
||||||
|
ErrorOr<void> try_to_acquire_data(Process& process, KBufferBuilder& builder) const;
|
||||||
|
|
||||||
|
const SegmentedProcFSIndex::ProcessSubDirectory m_parent_sub_directory_type;
|
||||||
|
union {
|
||||||
|
SegmentedProcFSIndex::MainProcessProperty property_type;
|
||||||
|
unsigned property_index;
|
||||||
|
} m_possible_data;
|
||||||
|
mutable Mutex m_refresh_lock;
|
||||||
|
};
|
||||||
|
}
|
96
Kernel/FileSystem/ProcFS/ProcessSubDirectoryInode.cpp
Normal file
96
Kernel/FileSystem/ProcFS/ProcessSubDirectoryInode.cpp
Normal file
|
@ -0,0 +1,96 @@
|
||||||
|
/*
|
||||||
|
* 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/ProcessSubDirectoryInode.h>
|
||||||
|
#include <Kernel/Process.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<ProcFSProcessSubDirectoryInode>> ProcFSProcessSubDirectoryInode::try_create(ProcFS const& procfs, SegmentedProcFSIndex::ProcessSubDirectory sub_directory_type, ProcessID pid)
|
||||||
|
{
|
||||||
|
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFSProcessSubDirectoryInode(procfs, sub_directory_type, pid));
|
||||||
|
}
|
||||||
|
|
||||||
|
ProcFSProcessSubDirectoryInode::ProcFSProcessSubDirectoryInode(ProcFS const& procfs, SegmentedProcFSIndex::ProcessSubDirectory sub_directory_type, ProcessID pid)
|
||||||
|
: ProcFSProcessAssociatedInode(procfs, pid, SegmentedProcFSIndex::build_segmented_index_for_sub_directory(pid, sub_directory_type))
|
||||||
|
, m_sub_directory_type(sub_directory_type)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<size_t> ProcFSProcessSubDirectoryInode::read_bytes_locked(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
|
||||||
|
{
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<void> ProcFSProcessSubDirectoryInode::attach(OpenFileDescription&)
|
||||||
|
{
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
void ProcFSProcessSubDirectoryInode::did_seek(OpenFileDescription&, off_t)
|
||||||
|
{
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
|
||||||
|
InodeMetadata ProcFSProcessSubDirectoryInode::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<void> ProcFSProcessSubDirectoryInode::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;
|
||||||
|
switch (m_sub_directory_type) {
|
||||||
|
case SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions:
|
||||||
|
return process->traverse_file_descriptions_directory(procfs().fsid(), move(callback));
|
||||||
|
case SegmentedProcFSIndex::ProcessSubDirectory::Stacks:
|
||||||
|
return process->traverse_stacks_directory(procfs().fsid(), move(callback));
|
||||||
|
case SegmentedProcFSIndex::ProcessSubDirectory::Children:
|
||||||
|
return process->traverse_children_directory(procfs().fsid(), move(callback));
|
||||||
|
default:
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
|
||||||
|
ErrorOr<NonnullLockRefPtr<Inode>> ProcFSProcessSubDirectoryInode::lookup(StringView name)
|
||||||
|
{
|
||||||
|
MutexLocker locker(procfs().m_lock);
|
||||||
|
auto process = Process::from_pid_in_same_jail(associated_pid());
|
||||||
|
if (!process)
|
||||||
|
return ESRCH;
|
||||||
|
switch (m_sub_directory_type) {
|
||||||
|
case SegmentedProcFSIndex::ProcessSubDirectory::OpenFileDescriptions:
|
||||||
|
return process->lookup_file_descriptions_directory(procfs(), name);
|
||||||
|
case SegmentedProcFSIndex::ProcessSubDirectory::Stacks:
|
||||||
|
return process->lookup_stacks_directory(procfs(), name);
|
||||||
|
case SegmentedProcFSIndex::ProcessSubDirectory::Children:
|
||||||
|
return process->lookup_children_directory(procfs(), name);
|
||||||
|
default:
|
||||||
|
VERIFY_NOT_REACHED();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
34
Kernel/FileSystem/ProcFS/ProcessSubDirectoryInode.h
Normal file
34
Kernel/FileSystem/ProcFS/ProcessSubDirectoryInode.h
Normal file
|
@ -0,0 +1,34 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <Kernel/FileSystem/ProcFS/ProcessAssociatedInode.h>
|
||||||
|
#include <Kernel/Forward.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
|
||||||
|
namespace Kernel {
|
||||||
|
|
||||||
|
class ProcFSProcessSubDirectoryInode final : public ProcFSProcessAssociatedInode {
|
||||||
|
friend class ProcFS;
|
||||||
|
|
||||||
|
public:
|
||||||
|
static ErrorOr<NonnullLockRefPtr<ProcFSProcessSubDirectoryInode>> try_create(ProcFS const&, SegmentedProcFSIndex::ProcessSubDirectory, ProcessID);
|
||||||
|
|
||||||
|
private:
|
||||||
|
ProcFSProcessSubDirectoryInode(ProcFS const&, SegmentedProcFSIndex::ProcessSubDirectory, ProcessID);
|
||||||
|
// ^Inode
|
||||||
|
virtual ErrorOr<void> attach(OpenFileDescription& description) override;
|
||||||
|
virtual void did_seek(OpenFileDescription&, off_t) override;
|
||||||
|
virtual InodeMetadata metadata() const override;
|
||||||
|
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
|
||||||
|
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override final;
|
||||||
|
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
|
||||||
|
|
||||||
|
const SegmentedProcFSIndex::ProcessSubDirectory m_sub_directory_type;
|
||||||
|
};
|
||||||
|
|
||||||
|
}
|
|
@ -5,9 +5,8 @@
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include <Kernel/Debug.h>
|
#include <Kernel/Debug.h>
|
||||||
#include <Kernel/Devices/BlockDevice.h>
|
#include <Kernel/FileSystem/ProcFS/DirectoryInode.h>
|
||||||
#include <Kernel/FileSystem/ProcFS.h>
|
#include <Kernel/FileSystem/ProcFS/LinkInode.h>
|
||||||
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
|
||||||
#include <Kernel/KBufferBuilder.h>
|
#include <Kernel/KBufferBuilder.h>
|
||||||
#include <Kernel/PerformanceEventBuffer.h>
|
#include <Kernel/PerformanceEventBuffer.h>
|
||||||
#include <Kernel/Process.h>
|
#include <Kernel/Process.h>
|
||||||
|
|
|
@ -4,8 +4,9 @@
|
||||||
* SPDX-License-Identifier: BSD-2-Clause
|
* SPDX-License-Identifier: BSD-2-Clause
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include <Kernel/FileSystem/ProcFS.h>
|
#include <Kernel/FileSystem/ProcFS/ProcessDirectoryInode.h>
|
||||||
#include <Kernel/Process.h>
|
#include <Kernel/Process.h>
|
||||||
|
#include <Kernel/ProcessExposed.h>
|
||||||
|
|
||||||
namespace Kernel {
|
namespace Kernel {
|
||||||
|
|
||||||
|
|
|
@ -8,7 +8,7 @@
|
||||||
#include <AK/JsonObjectSerializer.h>
|
#include <AK/JsonObjectSerializer.h>
|
||||||
#include <AK/JsonValue.h>
|
#include <AK/JsonValue.h>
|
||||||
#include <Kernel/FileSystem/Custody.h>
|
#include <Kernel/FileSystem/Custody.h>
|
||||||
#include <Kernel/FileSystem/ProcFS.h>
|
#include <Kernel/FileSystem/ProcFS/ProcessPropertyInode.h>
|
||||||
#include <Kernel/InterruptDisabler.h>
|
#include <Kernel/InterruptDisabler.h>
|
||||||
#include <Kernel/KBufferBuilder.h>
|
#include <Kernel/KBufferBuilder.h>
|
||||||
#include <Kernel/Memory/AnonymousVMObject.h>
|
#include <Kernel/Memory/AnonymousVMObject.h>
|
||||||
|
|
|
@ -7,7 +7,6 @@
|
||||||
#include <AK/OwnPtr.h>
|
#include <AK/OwnPtr.h>
|
||||||
#include <AK/Types.h>
|
#include <AK/Types.h>
|
||||||
#include <Kernel/Bus/PCI/API.h>
|
#include <Kernel/Bus/PCI/API.h>
|
||||||
#include <Kernel/FileSystem/ProcFS.h>
|
|
||||||
#include <Kernel/Library/LockRefPtr.h>
|
#include <Kernel/Library/LockRefPtr.h>
|
||||||
#include <Kernel/Sections.h>
|
#include <Kernel/Sections.h>
|
||||||
#include <Kernel/Storage/ATA/ATADiskDevice.h>
|
#include <Kernel/Storage/ATA/ATADiskDevice.h>
|
||||||
|
|
|
@ -12,7 +12,6 @@
|
||||||
#include <Kernel/Bus/PCI/API.h>
|
#include <Kernel/Bus/PCI/API.h>
|
||||||
#include <Kernel/CommandLine.h>
|
#include <Kernel/CommandLine.h>
|
||||||
#include <Kernel/Devices/Device.h>
|
#include <Kernel/Devices/Device.h>
|
||||||
#include <Kernel/FileSystem/ProcFS.h>
|
|
||||||
#include <Kernel/Library/LockRefPtr.h>
|
#include <Kernel/Library/LockRefPtr.h>
|
||||||
#include <Kernel/Sections.h>
|
#include <Kernel/Sections.h>
|
||||||
#include <Kernel/Storage/NVMe/NVMeController.h>
|
#include <Kernel/Storage/NVMe/NVMeController.h>
|
||||||
|
|
|
@ -10,7 +10,7 @@
|
||||||
#include <Kernel/FileSystem/FATFS/FileSystem.h>
|
#include <Kernel/FileSystem/FATFS/FileSystem.h>
|
||||||
#include <Kernel/FileSystem/ISO9660FileSystem.h>
|
#include <Kernel/FileSystem/ISO9660FileSystem.h>
|
||||||
#include <Kernel/FileSystem/Plan9FileSystem.h>
|
#include <Kernel/FileSystem/Plan9FileSystem.h>
|
||||||
#include <Kernel/FileSystem/ProcFS.h>
|
#include <Kernel/FileSystem/ProcFS/FileSystem.h>
|
||||||
#include <Kernel/FileSystem/SysFS/FileSystem.h>
|
#include <Kernel/FileSystem/SysFS/FileSystem.h>
|
||||||
#include <Kernel/FileSystem/TmpFS/FileSystem.h>
|
#include <Kernel/FileSystem/TmpFS/FileSystem.h>
|
||||||
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
||||||
|
|
Loading…
Reference in a new issue