/*
* The Mbuf Cluster zone destructor.
*/
static void
mb_dtor_clust(void *mem, int size, void *arg)
{
#ifdef INVARIANTS
uma_zone_t zone;
zone = m_getzone(size);
KASSERT(*(uma_find_refcnt(zone, mem)) <= 1,
("%s: refcnt incorrect %u", __func__,
*(uma_find_refcnt(zone, mem))) );
trash_dtor(mem, size, arg);
#endif
}
/*
* The Cluster and Jumbo[PAGESIZE|9|16] zone constructor.
*
* Here the 'arg' pointer points to the Mbuf which we
* are configuring cluster storage for. If 'arg' is
* empty we allocate just the cluster without setting
* the mbuf to it. See mbuf.h.
*/
static int
mb_ctor_clust(void *mem, int size, void *arg, int how)
{
struct mbuf *m;
u_int *refcnt;
int type;
uma_zone_t zone;
#ifdef INVARIANTS
trash_ctor(mem, size, arg, how);
#endif
switch (size) {
case MCLBYTES:
type = EXT_CLUSTER;
zone = zone_clust;
break;
#if MJUMPAGESIZE != MCLBYTES
case MJUMPAGESIZE:
type = EXT_JUMBOP;
zone = zone_jumbop;
break;
#endif
#ifdef PACKET_MMAP:
case MBUF_FRAME_SIZE:
type = EXT_PACKETMMAP;
zone = zone_packetmmap;
break;
#endif
case MJUM9BYTES:
type = EXT_JUMBO9;
zone = zone_jumbo9;
break;
case MJUM16BYTES:
type = EXT_JUMBO16;
zone = zone_jumbo16;
break;
default:
panic("unknown cluster size");
break;
}
m = (struct mbuf *)arg;
refcnt = uma_find_refcnt(zone, mem);
*refcnt = 1;
if (m != NULL) {
m->m_ext.ext_buf = (caddr_t)mem;
m->m_data = m->m_ext.ext_buf;
m->m_flags |= M_EXT;
m->m_ext.ext_free = NULL;
m->m_ext.ext_arg1 = NULL;
m->m_ext.ext_arg2 = NULL;
m->m_ext.ext_size = size;
m->m_ext.ext_type = type;
m->m_ext.ref_cnt = refcnt;
}
return (0);
}
/*
* The Cluster zone constructor.
*
* Here the 'arg' pointer points to the Mbuf which we
* are configuring cluster storage for.
*/
static int
mb_ctor_clust(void *mem, int size, void *arg, int how)
{
struct mbuf *m;
m = (struct mbuf *)arg;
m->m_ext.ext_buf = (caddr_t)mem;
m->m_data = m->m_ext.ext_buf;
m->m_flags |= M_EXT;
m->m_ext.ext_free = NULL;
m->m_ext.ext_args = NULL;
m->m_ext.ext_size = MCLBYTES;
m->m_ext.ext_type = EXT_CLUSTER;
m->m_ext.ref_cnt = (u_int *)uma_find_refcnt(zone_clust,
m->m_ext.ext_buf);
*(m->m_ext.ref_cnt) = 1;
mbstat.m_mclusts += 1; /* XXX */
return (0);
}