Date: Mon, 29 Mar 2004 14:16:39 -0800 (PST) From: Robert Watson <rwatson@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/net if_tun.c Message-ID: <200403292216.i2TMGdUs083265@repoman.freebsd.org>
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rwatson 2004/03/29 14:16:39 PST
FreeBSD src repository
Modified files:
sys/net if_tun.c
Log:
Add per-softc locking to if_tun:
- Add tun_mtx to tun_softc. Annotate what is (and isn't) locked by it.
- Lock down tun_flags, tun_pid.
- In the output path, cache the value of tun_flags so it's consistent
when processing a particular packet rather than re-reading the field.
- In general, use unlocked reads for debugging.
- Annotate a couple of places where additional unlocked reads may be
possible.
- Annotate that tun_pid is used as a bug in tunopen().
if_tun is now largely MPSAFE, although questions remain about some of
the cdevsw fields and how they are synchronized.
Revision Changes Path
1.139 +66 -6 src/sys/net/if_tun.c
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