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netgraph/ng_bridge: Add counters for the first link, too

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For broadcast, multicast and unknown unicast, the replication loop
sends a copy of the packet to each link, beside the first one. This
special path is handled later, but the counters are not updated.
Factor out the common send and count actions as a function.

Reviewed by:	kp
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D28537
This commit is contained in:
Lutz Donnerhacke 2021-02-10 11:47:38 +01:00
parent e6f59be239
commit 3c958f5fdf
1 changed files with 38 additions and 21 deletions
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59
sys/netgraph/ng_bridge.c
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@ -626,6 +626,41 @@ struct ng_bridge_send_ctx {
int manycast, error;
};
/*
* Update stats and send out
*/
static inline int
ng_bridge_send_data(link_cp dst, int manycast, struct mbuf *m, item_p item) {
int error = 0;
size_t len = m->m_pkthdr.len;
if(item != NULL)
NG_FWD_NEW_DATA(error, item, dst->hook, m);
else
NG_SEND_DATA_ONLY(error, dst->hook, m);
if (error == 0) {
counter_u64_add(dst->stats.xmitPackets, 1);
counter_u64_add(dst->stats.xmitOctets, len);
switch (manycast) {
default: /* unknown unicast */
break;
case 1: /* multicast */
counter_u64_add(dst->stats.xmitMulticasts, 1);
break;
case 2: /* broadcast */
counter_u64_add(dst->stats.xmitBroadcasts, 1);
break;
}
}
return (error);
}
/*
* Loop body for sending to multiple destinations
* return 0 to stop looping
*/
static int
ng_bridge_send_ctx(hook_p dst, void *arg)
{
@ -664,22 +699,8 @@ ng_bridge_send_ctx(hook_p dst, void *arg)
return (0); /* abort loop */
}
/* Update stats */
counter_u64_add(destLink->stats.xmitPackets, 1);
counter_u64_add(destLink->stats.xmitOctets, m2->m_pkthdr.len);
switch (ctx->manycast) {
default: /* unknown unicast */
break;
case 1: /* multicast */
counter_u64_add(destLink->stats.xmitMulticasts, 1);
break;
case 2: /* broadcast */
counter_u64_add(destLink->stats.xmitBroadcasts, 1);
break;
}
/* Send packet */
NG_SEND_DATA_ONLY(error, destLink->hook, m2);
error = ng_bridge_send_data(destLink, ctx->manycast, m2, NULL);
if(error)
ctx->error = error;
return (1);
@ -820,10 +841,7 @@ ng_bridge_rcvdata(hook_p hook, item_p item)
}
/* Deliver packet out the destination link */
counter_u64_add(destLink->stats.xmitPackets, 1);
counter_u64_add(destLink->stats.xmitOctets, ctx.m->m_pkthdr.len);
NG_FWD_NEW_DATA(ctx.error, item, destLink->hook, ctx.m);
return (ctx.error);
return (ng_bridge_send_data(destLink, ctx.manycast, ctx.m, item));
}
/* Destination host is not known */
@ -844,8 +862,7 @@ ng_bridge_rcvdata(hook_p hook, item_p item)
* If we've sent all the others, send the original
* on the first link we found.
*/
NG_FWD_NEW_DATA(ctx.error, item, ctx.foundFirst->hook, ctx.m);
return (ctx.error);
return (ng_bridge_send_data(ctx.foundFirst, ctx.manycast, ctx.m, item));
}
/*