CVS commit: src/sys/miscfs/specfs

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Mon Mar 28 12:37:27 UTC 2022

Modified Files:
        src/sys/miscfs/specfs: spec_vnops.c

Log Message:
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.


To generate a diff of this commit:
cvs rdiff -u -r1.205 -r1.206 src/sys/miscfs/specfs/spec_vnops.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.