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netns: ipmr: allocate mroute_socket per-namespace.

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Preliminary work to make IPv4 multicast routing netns-aware.

Make IPv4 multicast routing mroute_socket per-namespace,
moves it into struct netns_ipv4.

At the moment, mroute_socket 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 04:56:15 +00:00 committed by David S. Miller
parent e35fac80ed
commit 70a269e6c9
2 changed files with 17 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/netns/ipv4.h
View File

@ -54,5 +54,9 @@ struct netns_ipv4 {
struct timer_list rt_secret_timer;
atomic_t rt_genid;
#ifdef CONFIG_IP_MROUTE
struct sock *mroute_sk;
#endif
};
#endif

28
net/ipv4/ipmr.c
View File

@ -67,9 +67,6 @@
#define CONFIG_IP_PIMSM 1
#endif
static struct sock *mroute_socket;
/* Big lock, protecting vif table, mrt cache and mroute socket state.
Note that the changes are semaphored via rtnl_lock.
*/
@ -658,7 +655,7 @@ static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert)
skb->transport_header = skb->network_header;
}
if (mroute_socket == NULL) {
if (init_net.ipv4.mroute_sk == NULL) {
kfree_skb(skb);
return -EINVAL;
}
@ -666,7 +663,8 @@ static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert)
/*
* Deliver to mrouted
*/
if ((ret = sock_queue_rcv_skb(mroute_socket, skb))<0) {
ret = sock_queue_rcv_skb(init_net.ipv4.mroute_sk, skb);
if (ret < 0) {
if (net_ratelimit())
printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n");
kfree_skb(skb);
@ -896,11 +894,11 @@ static void mroute_clean_tables(struct sock *sk)
static void mrtsock_destruct(struct sock *sk)
{
rtnl_lock();
if (sk == mroute_socket) {
if (sk == init_net.ipv4.mroute_sk) {
IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)--;
write_lock_bh(&mrt_lock);
mroute_socket = NULL;
init_net.ipv4.mroute_sk = NULL;
write_unlock_bh(&mrt_lock);
mroute_clean_tables(sk);
@ -922,7 +920,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
struct mfcctl mfc;
if (optname != MRT_INIT) {
if (sk != mroute_socket && !capable(CAP_NET_ADMIN))
if (sk != init_net.ipv4.mroute_sk && !capable(CAP_NET_ADMIN))
return -EACCES;
}
@ -935,7 +933,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
return -ENOPROTOOPT;
rtnl_lock();
if (mroute_socket) {
if (init_net.ipv4.mroute_sk) {
rtnl_unlock();
return -EADDRINUSE;
}
@ -943,7 +941,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
ret = ip_ra_control(sk, 1, mrtsock_destruct);
if (ret == 0) {
write_lock_bh(&mrt_lock);
mroute_socket = sk;
init_net.ipv4.mroute_sk = sk;
write_unlock_bh(&mrt_lock);
IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)++;
@ -951,7 +949,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
rtnl_unlock();
return ret;
case MRT_DONE:
if (sk != mroute_socket)
if (sk != init_net.ipv4.mroute_sk)
return -EACCES;
return ip_ra_control(sk, 0, NULL);
case MRT_ADD_VIF:
@ -964,7 +962,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
return -ENFILE;
rtnl_lock();
if (optname == MRT_ADD_VIF) {
ret = vif_add(&vif, sk==mroute_socket);
ret = vif_add(&vif, sk == init_net.ipv4.mroute_sk);
} else {
ret = vif_delete(vif.vifc_vifi, 0);
}
@ -985,7 +983,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int
if (optname == MRT_DEL_MFC)
ret = ipmr_mfc_delete(&mfc);
else
ret = ipmr_mfc_add(&mfc, sk==mroute_socket);
ret = ipmr_mfc_add(&mfc, sk == init_net.ipv4.mroute_sk);
rtnl_unlock();
return ret;
/*
@ -1425,9 +1423,9 @@ int ip_mr_input(struct sk_buff *skb)
that we can forward NO IGMP messages.
*/
read_lock(&mrt_lock);
if (mroute_socket) {
if (init_net.ipv4.mroute_sk) {
nf_reset(skb);
raw_rcv(mroute_socket, skb);
raw_rcv(init_net.ipv4.mroute_sk, skb);
read_unlock(&mrt_lock);
return 0;
}