---
- branch: MAIN
  date: Mon Mar 28 12:37:27 UTC 2022
  files:
  - new: '1.206'
    old: '1.205'
    path: src/sys/miscfs/specfs/spec_vnops.c
    pathrev: src/sys/miscfs/specfs/spec_vnops.c@1.206
    type: modified
  id: 20220328T123727Z.410ec32e848326a1d0316ccdcf6a61ec80995231
  log: |
    specfs: Take an I/O reference across bdev/cdev_open.

    - Revoke is used to invalidate all prior access control checks when
      device permissions are changing, so it must wait for .d_open to exit
      so any new access must go through new access control checks.

    - Revoke is used by vdevgone in xyz_detach to wait until all use of
      the driver's data structures have completed before xyz_detach frees
      them.

    So we need to make sure spec_close waits for .d_open too.
  module: src
  subject: 'CVS commit: src/sys/miscfs/specfs'
  unixtime: '1648471047'
  user: riastradh