static int mif6_delete(int vifi)
{
struct mif_device *v;
struct net_device *dev;
if (vifi < 0 || vifi >= maxvif)
return -EADDRNOTAVAIL;
v = &vif6_table[vifi];
write_lock_bh(&mrt_lock);
dev = v->dev;
v->dev = NULL;
if (!dev) {
write_unlock_bh(&mrt_lock);
return -EADDRNOTAVAIL;
}
#ifdef CONFIG_IPV6_PIMSM_V2
if (vifi == reg_vif_num)
reg_vif_num = -1;
#endif
if (vifi + 1 == maxvif) {
int tmp;
for (tmp = vifi - 1; tmp >= 0; tmp--) {
if (MIF_EXISTS(tmp))
break;
}
maxvif = tmp + 1;
}
write_unlock_bh(&mrt_lock);
dev_set_allmulti(dev, -1);
if (v->flags & MIFF_REGISTER)
unregister_netdevice(dev);
dev_put(dev);
return 0;
}
static void ip6mr_update_thresholds(struct mfc6_cache *cache, unsigned char *ttls)
{
int vifi;
struct net *net = mfc6_net(cache);
cache->mfc_un.res.minvif = MAXMIFS;
cache->mfc_un.res.maxvif = 0;
memset(cache->mfc_un.res.ttls, 255, MAXMIFS);
for (vifi = 0; vifi < net->ipv6.maxvif; vifi++) {
if (MIF_EXISTS(net, vifi) &&
ttls[vifi] && ttls[vifi] < 255) {
cache->mfc_un.res.ttls[vifi] = ttls[vifi];
if (cache->mfc_un.res.minvif > vifi)
cache->mfc_un.res.minvif = vifi;
if (cache->mfc_un.res.maxvif <= vifi)
cache->mfc_un.res.maxvif = vifi + 1;
}
}
}
static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
{
int n;
struct net *net = seq_file_net(seq);
if (v == SEQ_START_TOKEN) {
seq_puts(seq,
"Group "
"Origin "
"Iif Pkts Bytes Wrong Oifs\n");
} else {
const struct mfc6_cache *mfc = v;
const struct ipmr_mfc_iter *it = seq->private;
seq_printf(seq, "%pI6 %pI6 %-3hd",
&mfc->mf6c_mcastgrp, &mfc->mf6c_origin,
mfc->mf6c_parent);
if (it->cache != &mfc_unres_queue) {
seq_printf(seq, " %8lu %8lu %8lu",
mfc->mfc_un.res.pkt,
mfc->mfc_un.res.bytes,
mfc->mfc_un.res.wrong_if);
for (n = mfc->mfc_un.res.minvif;
n < mfc->mfc_un.res.maxvif; n++) {
if (MIF_EXISTS(net, n) &&
mfc->mfc_un.res.ttls[n] < 255)
seq_printf(seq,
" %2d:%-3d",
n, mfc->mfc_un.res.ttls[n]);
}
} else {
/* unresolved mfc_caches don't contain
* pkt, bytes and wrong_if values
*/
seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul);
}
seq_putc(seq, '\n');
}
return 0;
}
static int mif6_add(struct mif6ctl *vifc, int mrtsock)
{
int vifi = vifc->mif6c_mifi;
struct mif_device *v = &vif6_table[vifi];
struct net_device *dev;
/* Is vif busy ? */
if (MIF_EXISTS(vifi))
return -EADDRINUSE;
switch (vifc->mif6c_flags) {
#ifdef CONFIG_IPV6_PIMSM_V2
case MIFF_REGISTER:
/*
* Special Purpose VIF in PIM
* All the packets will be sent to the daemon
*/
if (reg_vif_num >= 0)
return -EADDRINUSE;
dev = ip6mr_reg_vif();
if (!dev)
return -ENOBUFS;
break;
#endif
case 0:
dev = dev_get_by_index(vifc->mif6c_pifi);
if (!dev)
return -EADDRNOTAVAIL;
dev_put(dev);
break;
default:
return -EINVAL;
}
dev_set_allmulti(dev, 1);
/*
* Fill in the VIF structures
*/
v->rate_limit = vifc->vifc_rate_limit;
v->flags = vifc->mif6c_flags;
if (!mrtsock)
v->flags |= VIFF_STATIC;
v->threshold = vifc->vifc_threshold;
v->bytes_in = 0;
v->bytes_out = 0;
v->pkt_in = 0;
v->pkt_out = 0;
v->link = dev->ifindex;
if (v->flags & MIFF_REGISTER)
v->link = dev->iflink;
/* And finish update writing critical data */
write_lock_bh(&mrt_lock);
dev_hold(dev);
v->dev = dev;
#ifdef CONFIG_IPV6_PIMSM_V2
if (v->flags & MIFF_REGISTER)
reg_vif_num = vifi;
#endif
if (vifi + 1 > maxvif)
maxvif = vifi + 1;
write_unlock_bh(&mrt_lock);
return 0;
}
