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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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4
Kernel/Process.h
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@ -251,7 +251,9 @@ public:
KResultOr<int> sys$beep();
KResultOr<int> sys$get_process_name(Userspace<char*> buffer, size_t buffer_size);
KResultOr<int> sys$set_process_name(Userspace<const char*> user_name, size_t user_name_length);
KResultOr<int> sys$watch_file(Userspace<const char*> path, size_t path_length);
KResultOr<int> sys$create_inode_watcher(u32 flags);
KResultOr<int> sys$inode_watcher_add_watch(Userspace<const Syscall::SC_inode_watcher_add_watch_params*> user_params);
KResultOr<int> sys$inode_watcher_remove_watch(int fd, int wd);
KResultOr<int> sys$dbgputch(u8);
KResultOr<int> sys$dbgputstr(Userspace<const u8*>, int length);
KResultOr<int> sys$dump_backtrace();