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Kernel: Implement multi-watch InodeWatcher :^)

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This patch modifies InodeWatcher to switch to a one watcher, multiple
watches architecture.  The following changes have been made:

- The watch_file syscall is removed, and in its place the
  create_iwatcher, iwatcher_add_watch and iwatcher_remove_watch calls
  have been added.
- InodeWatcher now holds multiple WatchDescriptions for each file that
  is being watched.
- The InodeWatcher file descriptor can be read from to receive events on
  all watched files.

Co-authored-by: Gunnar Beutner <gunnar@beutner.name>
This commit is contained in:
sin-ack 2021-05-12 19:17:51 +00:00 • committed by Andreas Kling
parent 2de11b0dc8
commit fe5ca6ca27
16 changed files with 521 additions and 262 deletions
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7
Kernel/FileSystem/Inode.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -111,8 +112,10 @@ protected:
void set_metadata_dirty(bool);
KResult prepare_to_write_data();
void did_add_child(const InodeIdentifier&);
void did_remove_child(const InodeIdentifier&);
void did_add_child(InodeIdentifier const& child_id, String const& name);
void did_remove_child(InodeIdentifier const& child_id, String const& name);
void did_modify_contents();
void did_delete_self();
mutable Lock m_lock { "Inode" };