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netgraph/ng_source: If queue is full, don't enqueue

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Submitted by: nc
Reviewed by: donner, kp
Approved by: kp (mentor)
Differential Revision: https://reviews.freebsd.org/D23477
This commit is contained in:
Lutz Donnerhacke 2021-01-23 18:54:47 +01:00
parent 519b64e27f
commit d7dd28bb09
1 changed files with 6 additions and 3 deletions
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9
sys/netgraph/ng_source.c
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@ -284,7 +284,7 @@ ng_source_constructor(node_p node)
NG_NODE_SET_PRIVATE(node, sc);
sc->node = node;
sc->snd_queue.ifq_maxlen = 2048; /* XXX not checked */
sc->snd_queue.ifq_maxlen = 2048;
ng_callout_init(&sc->intr_ch);
return (0);
@ -567,8 +567,11 @@ ng_source_rcvdata(hook_p hook, item_p item)
}
KASSERT(hook == sc->input, ("%s: no hook!", __func__));
/* Enqueue packet. */
/* XXX should we check IF_QFULL() ? */
/* Enqueue packet if the queue isn't full. */
if (_IF_QFULL(&sc->snd_queue)) {
NG_FREE_M(m);
return (ENOBUFS);
}
_IF_ENQUEUE(&sc->snd_queue, m);
sc->queueOctets += m->m_pkthdr.len;
sc->last_packet = m;