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Optimize the way we call BPF a tiny bit: If we chop the ether-header off

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ourselves, call bpf before we do so, rather than re-construct the entire
thing afterwards.

Sponsored:	http://www.babeltech.dk/
This commit is contained in:
Poul-Henning Kamp 2002-09-18 19:50:48 +00:00
parent f0e2422b1b
commit 2201e1b039
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103556
1 changed files with 7 additions and 8 deletions
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15
sys/net/if_ethersubr.c
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@ -566,19 +566,14 @@ ether_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
m_freem(m);
return;
}
if (ifp->if_bpf != NULL)
bpf_mtap(ifp, m);
m->m_pkthdr.rcvif = ifp;
eh = mtod(m, struct ether_header *);
m->m_data += sizeof(struct ether_header);
m->m_len -= sizeof(struct ether_header);
m->m_pkthdr.len = m->m_len;
}
#ifdef MAC
mac_create_mbuf_from_ifnet(ifp, m);
#endif
/* Check for a BPF tap */
if (ifp->if_bpf != NULL) {
} else if (ifp->if_bpf != NULL) {
struct m_hdr mh;
/* This kludge is OK; BPF treats the "mbuf" as read-only */
@ -588,6 +583,10 @@ ether_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
bpf_mtap(ifp, (struct mbuf *)&mh);
}
#ifdef MAC
mac_create_mbuf_from_ifnet(ifp, m);
#endif
ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
/* Handle ng_ether(4) processing, if any */