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Show First 20 Lines • Show All 1,417 Lines • ▼ Show 20 Lines	m_getm2(struct mbuf *m, int len, int how, short type, int flags)
flags &= (M_PKTHDR \| M_EOR);		flags &= (M_PKTHDR \| M_EOR);

/* Packet header mbuf must be first in chain. */		/* Packet header mbuf must be first in chain. */
if ((flags & M_PKTHDR) && m != NULL)		if ((flags & M_PKTHDR) && m != NULL)
flags &= ~M_PKTHDR;		flags &= ~M_PKTHDR;

/* Loop and append maximum sized mbufs to the chain tail. */		/* Loop and append maximum sized mbufs to the chain tail. */
while (len > 0) {		while (len > 0) {
if (len > MCLBYTES)		mb = NULL;
mb = m_getjcl(how, type, (flags & M_PKTHDR),		if (len > MCLBYTES) {
		mb = m_getjcl(M_NOWAIT, type, (flags & M_PKTHDR),
MJUMPAGESIZE);		MJUMPAGESIZE);
else if (len >= MINCLSIZE)
		}
		if (mb == NULL) {
		if (len >= MINCLSIZE)
mb = m_getcl(how, type, (flags & M_PKTHDR));		mb = m_getcl(how, type, (flags & M_PKTHDR));
else if (flags & M_PKTHDR)		else if (flags & M_PKTHDR)
mb = m_gethdr(how, type);		mb = m_gethdr(how, type);
else		else
mb = m_get(how, type);		mb = m_get(how, type);

/* Fail the whole operation if one mbuf can't be allocated. */		/*
		* Fail the whole operation if one mbuf can't be
		* allocated.
		*/
if (mb == NULL) {		if (mb == NULL) {
if (nm != NULL)
m_freem(nm);		m_freem(nm);
return (NULL);		return (NULL);
		}
}		}

/* Book keeping. */		/* Book keeping. */
len -= M_SIZE(mb);		len -= M_SIZE(mb);
if (mtail != NULL)		if (mtail != NULL)
mtail->m_next = mb;		mtail->m_next = mb;
else		else
nm = mb;		nm = mb;
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