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Kernel: Use IntrusiveList for keeping track of InodeWatchers

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This commit is contained in:
Andreas Kling 2021-07-21 20:09:57 +02:00
parent cdc1315dc8
commit 43d6a7e74e
Notes: sideshowbarker 2024-07-18 08:38:02 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/43d6a7e74ec
3 changed files with 19 additions and 14 deletions
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22
Kernel/FileSystem/Inode.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
@ -105,7 +105,7 @@ Inode::~Inode()
all_with_lock().remove(*this);
for (auto& watcher : m_watchers) {
watcher->unregister_by_inode({}, identifier());
watcher.unregister_by_inode({}, identifier());
}
}
@ -168,15 +168,15 @@ bool Inode::unbind_socket()
void Inode::register_watcher(Badge<InodeWatcher>, InodeWatcher& watcher)
{
MutexLocker locker(m_inode_lock);
VERIFY(!m_watchers.contains(&watcher));
m_watchers.set(&watcher);
VERIFY(!m_watchers.contains(watcher));
m_watchers.append(watcher);
}
void Inode::unregister_watcher(Badge<InodeWatcher>, InodeWatcher& watcher)
{
MutexLocker locker(m_inode_lock);
VERIFY(m_watchers.contains(&watcher));
m_watchers.remove(&watcher);
VERIFY(m_watchers.contains(watcher));
m_watchers.remove(watcher);
}
NonnullRefPtr<FIFO> Inode::fifo()
@ -209,7 +209,7 @@ void Inode::set_metadata_dirty(bool metadata_dirty)
// FIXME: Maybe we should hook into modification events somewhere else, I'm not sure where.
// We don't always end up on this particular code path, for instance when writing to an ext2fs file.
for (auto& watcher : m_watchers) {
watcher->notify_inode_event({}, identifier(), InodeWatcherEvent::Type::MetadataModified);
watcher.notify_inode_event({}, identifier(), InodeWatcherEvent::Type::MetadataModified);
}
}
}
@ -219,7 +219,7 @@ void Inode::did_add_child(InodeIdentifier const&, String const& name)
MutexLocker locker(m_inode_lock);
for (auto& watcher : m_watchers) {
watcher->notify_inode_event({}, identifier(), InodeWatcherEvent::Type::ChildCreated, name);
watcher.notify_inode_event({}, identifier(), InodeWatcherEvent::Type::ChildCreated, name);
}
}
@ -233,7 +233,7 @@ void Inode::did_remove_child(InodeIdentifier const&, String const& name)
}
for (auto& watcher : m_watchers) {
watcher->notify_inode_event({}, identifier(), InodeWatcherEvent::Type::ChildDeleted, name);
watcher.notify_inode_event({}, identifier(), InodeWatcherEvent::Type::ChildDeleted, name);
}
}
@ -241,7 +241,7 @@ void Inode::did_modify_contents()
{
MutexLocker locker(m_inode_lock);
for (auto& watcher : m_watchers) {
watcher->notify_inode_event({}, identifier(), InodeWatcherEvent::Type::ContentModified);
watcher.notify_inode_event({}, identifier(), InodeWatcherEvent::Type::ContentModified);
}
}
@ -249,7 +249,7 @@ void Inode::did_delete_self()
{
MutexLocker locker(m_inode_lock);
for (auto& watcher : m_watchers) {
watcher->notify_inode_event({}, identifier(), InodeWatcherEvent::Type::Deleted);
watcher.notify_inode_event({}, identifier(), InodeWatcherEvent::Type::Deleted);
}
}

6
Kernel/FileSystem/Inode.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
@ -8,7 +8,6 @@
#pragma once
#include <AK/Function.h>
#include <AK/HashTable.h>
#include <AK/IntrusiveList.h>
#include <AK/RefCounted.h>
#include <AK/String.h>
@ -17,6 +16,7 @@
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/InodeIdentifier.h>
#include <Kernel/FileSystem/InodeMetadata.h>
#include <Kernel/FileSystem/InodeWatcher.h>
#include <Kernel/Forward.h>
#include <Kernel/KResult.h>
#include <Kernel/Mutex.h>
@ -119,7 +119,7 @@ private:
InodeIndex m_index { 0 };
WeakPtr<SharedInodeVMObject> m_shared_vmobject;
RefPtr<LocalSocket> m_socket;
HashTable<InodeWatcher*> m_watchers;
InodeWatcher::List m_watchers;
bool m_metadata_dirty { false };
RefPtr<FIFO> m_fifo;
IntrusiveListNode<Inode> m_inode_list_node;

5
Kernel/FileSystem/InodeWatcher.h
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@ -80,6 +80,11 @@ private:
// watch description, so they will overlap.
HashMap<int, NonnullOwnPtr<WatchDescription>> m_wd_to_watches;
HashMap<InodeIdentifier, WatchDescription*> m_inode_to_watches;
IntrusiveListNode<InodeWatcher> m_list_node;
public:
using List = IntrusiveList<InodeWatcher, RawPtr<InodeWatcher>, &InodeWatcher::m_list_node>;
};
}