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Fix semantics of ph_busy_count == -1 to pass instead of block.

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PR:		kern/81128
Submitted by:	Joost Bekkers
MFC-after:	2 weeks
This commit is contained in:
Max Laier 2005-05-23 17:07:16 +00:00
parent 61a20ce696
commit d274e6b641
1 changed files with 3 additions and 1 deletions
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4
sys/net/pfil.c
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@ -119,12 +119,14 @@ pfil_run_hooks(struct pfil_head *ph, struct mbuf **mp, struct ifnet *ifp,
struct mbuf *m = *mp;
int rv = 0;
if (ph->ph_busy_count == -1)
return (0);
/*
* Prevent packet filtering from starving the modification of
* the packet filters. We would prefer a reader/writer locking
* mechanism with guaranteed ordering, though.
*/
if (ph->ph_busy_count == -1 || ph->ph_want_write) {
if (ph->ph_want_write) {
m_freem(*mp);
*mp = NULL;
return (ENOBUFS);