Fanotify

Things that need to be fixed:

• Ignore masks, so that events on files can be ignored until the files are modified
• Reliable vs. non-reliable delivery
• Support for access decisions
• Per mount point notification (general subtree notification seems too hard)
  • Clarify how mount point marks should propagate to new mounts from parent mounts, when creating a new bind mount, and to existing bind mounts.
• Include uid, not just pid

Probably for the next round:

• Add a flag to turn off event merging (or make merging less aggressive) so that events will happen "in order"?
• Support non-root users (will require permission checks)
• Support directory events by passing an fd to the directory
  • Allow users to get a wd instead of an fd if desired (please explain!)