CVS commit: src/sys/net

["Rin Okuyama" <rin%netbsd.org@localhost>]

Module Name:    src
Committed By:   rin
Date:           Wed Sep 18 23:20:20 UTC 2024

Modified Files:
        src/sys/net: if_tun.c

Log Message:
tun(4): Mark tunread_filtops `FILTEROP_MPSAFE`

Filter handlers have already been MP-safe since 2018:
https://mail-index.netbsd.org/source-changes/2018/08/06/msg097317.html

Note that we do not expect deadlocks similar to bpf(4) (PR kern/58531),
b/w KERNEL_LOCK and spin mutex for TX queue.

For tun(4), filt_tunread() acquires adaptive mutex. This is forbidden
when spin mutex is already held.

Such a path must have already been detected if present.

Thanks ozaki-r@ for discussion.


To generate a diff of this commit:
cvs rdiff -u -r1.176 -r1.177 src/sys/net/if_tun.c

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