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netns: ipmr: declare reg_vif_num per-namespace

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Preliminary work to make IPv4 multicast routing netns-aware.

Declare variable 'reg_vif_num' per-namespace, move into struct netns_ipv4.

At the moment, this variable is only referenced in init_net.

Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin Thery 2009-01-22 04:56:21 +00:00 committed by David S. Miller
parent 6f9374a934
commit 6c5143dbcf
2 changed files with 15 additions and 10 deletions
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3
include/net/netns/ipv4.h
View file

@ -63,6 +63,9 @@ struct netns_ipv4 {
atomic_t cache_resolve_queue_len;
int mroute_do_assert;
int mroute_do_pim;
#if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2)
int mroute_reg_vif_num;
#endif
#endif
};
#endif

22
net/ipv4/ipmr.c
View file

@ -197,14 +197,12 @@ failure:
#ifdef CONFIG_IP_PIMSM
static int reg_vif_num = -1;
static int reg_vif_xmit(struct sk_buff *skb, struct net_device *dev)
{
read_lock(&mrt_lock);
dev->stats.tx_bytes += skb->len;
dev->stats.tx_packets++;
ipmr_cache_report(skb, reg_vif_num, IGMPMSG_WHOLEPKT);
ipmr_cache_report(skb, init_net.ipv4.mroute_reg_vif_num, IGMPMSG_WHOLEPKT);
read_unlock(&mrt_lock);
kfree_skb(skb);
return 0;
@ -292,8 +290,8 @@ static int vif_delete(int vifi, int notify)
}
#ifdef CONFIG_IP_PIMSM
if (vifi == reg_vif_num)
reg_vif_num = -1;
if (vifi == init_net.ipv4.mroute_reg_vif_num)
init_net.ipv4.mroute_reg_vif_num = -1;
#endif
if (vifi+1 == init_net.ipv4.maxvif) {
@ -439,7 +437,7 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
* Special Purpose VIF in PIM
* All the packets will be sent to the daemon
*/
if (reg_vif_num >= 0)
if (init_net.ipv4.mroute_reg_vif_num >= 0)
return -EADDRINUSE;
dev = ipmr_reg_vif();
if (!dev)
@ -505,7 +503,7 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
v->dev = dev;
#ifdef CONFIG_IP_PIMSM
if (v->flags&VIFF_REGISTER)
reg_vif_num = vifi;
init_net.ipv4.mroute_reg_vif_num = vifi;
#endif
if (vifi+1 > init_net.ipv4.maxvif)
init_net.ipv4.maxvif = vifi+1;
@ -623,7 +621,7 @@ static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert)
memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr));
msg->im_msgtype = IGMPMSG_WHOLEPKT;
msg->im_mbz = 0;
msg->im_vif = reg_vif_num;
msg->im_vif = init_net.ipv4.mroute_reg_vif_num;
ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2;
ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) +
sizeof(struct iphdr));
@ -1506,8 +1504,8 @@ static int __pim_rcv(struct sk_buff *skb, unsigned int pimlen)
return 1;
read_lock(&mrt_lock);
if (reg_vif_num >= 0)
reg_dev = init_net.ipv4.vif_table[reg_vif_num].dev;
if (init_net.ipv4.mroute_reg_vif_num >= 0)
reg_dev = init_net.ipv4.vif_table[init_net.ipv4.mroute_reg_vif_num].dev;
if (reg_dev)
dev_hold(reg_dev);
read_unlock(&mrt_lock);
@ -1940,6 +1938,10 @@ static int __net_init ipmr_net_init(struct net *net)
err = -ENOMEM;
goto fail_mfc_cache;
}
#ifdef CONFIG_IP_PIMSM
net->ipv4.mroute_reg_vif_num = -1;
#endif
return 0;
fail_mfc_cache: