forked from luck/tmp_suning_uos_patched
netns: ipmr: dynamically allocate vif_table
Preliminary work to make IPv6 multicast routing netns-aware. Dynamically allocate interface table vif_table and move it to struct netns_ipv4, and update MIF_EXISTS() macro. At the moment, vif_table 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
David S. Miller
parent
70a269e6c9
commit
cf958ae377
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@ -57,6 +57,8 @@ struct netns_ipv4 {
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#ifdef CONFIG_IP_MROUTE
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struct sock *mroute_sk;
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struct vif_device *vif_table;
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int maxvif;
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#endif
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};
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#endif
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109
net/ipv4/ipmr.c
109
net/ipv4/ipmr.c
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@ -77,10 +77,7 @@ static DEFINE_RWLOCK(mrt_lock);
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* Multicast router control variables
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*/
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static struct vif_device vif_table[MAXVIFS]; /* Devices */
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static int maxvif;
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#define VIF_EXISTS(idx) (vif_table[idx].dev != NULL)
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#define VIF_EXISTS(_net, _idx) ((_net)->ipv4.vif_table[_idx].dev != NULL)
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static int mroute_do_assert; /* Set in PIM assert */
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static int mroute_do_pim;
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@ -286,10 +283,10 @@ static int vif_delete(int vifi, int notify)
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struct net_device *dev;
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struct in_device *in_dev;
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if (vifi < 0 || vifi >= maxvif)
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if (vifi < 0 || vifi >= init_net.ipv4.maxvif)
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return -EADDRNOTAVAIL;
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v = &vif_table[vifi];
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v = &init_net.ipv4.vif_table[vifi];
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write_lock_bh(&mrt_lock);
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dev = v->dev;
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@ -305,13 +302,13 @@ static int vif_delete(int vifi, int notify)
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reg_vif_num = -1;
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#endif
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if (vifi+1 == maxvif) {
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if (vifi+1 == init_net.ipv4.maxvif) {
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int tmp;
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for (tmp=vifi-1; tmp>=0; tmp--) {
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if (VIF_EXISTS(tmp))
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if (VIF_EXISTS(&init_net, tmp))
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break;
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}
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maxvif = tmp+1;
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init_net.ipv4.maxvif = tmp+1;
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}
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write_unlock_bh(&mrt_lock);
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@ -411,8 +408,9 @@ static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls)
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cache->mfc_un.res.maxvif = 0;
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memset(cache->mfc_un.res.ttls, 255, MAXVIFS);
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for (vifi=0; vifi<maxvif; vifi++) {
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if (VIF_EXISTS(vifi) && ttls[vifi] && ttls[vifi] < 255) {
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for (vifi = 0; vifi < init_net.ipv4.maxvif; vifi++) {
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if (VIF_EXISTS(&init_net, vifi) &&
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ttls[vifi] && ttls[vifi] < 255) {
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cache->mfc_un.res.ttls[vifi] = ttls[vifi];
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if (cache->mfc_un.res.minvif > vifi)
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cache->mfc_un.res.minvif = vifi;
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@ -425,13 +423,13 @@ static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls)
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static int vif_add(struct vifctl *vifc, int mrtsock)
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{
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int vifi = vifc->vifc_vifi;
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struct vif_device *v = &vif_table[vifi];
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struct vif_device *v = &init_net.ipv4.vif_table[vifi];
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struct net_device *dev;
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struct in_device *in_dev;
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int err;
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/* Is vif busy ? */
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if (VIF_EXISTS(vifi))
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if (VIF_EXISTS(&init_net, vifi))
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return -EADDRINUSE;
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switch (vifc->vifc_flags) {
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@ -509,8 +507,8 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
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if (v->flags&VIFF_REGISTER)
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reg_vif_num = vifi;
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#endif
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if (vifi+1 > maxvif)
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maxvif = vifi+1;
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if (vifi+1 > init_net.ipv4.maxvif)
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init_net.ipv4.maxvif = vifi+1;
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write_unlock_bh(&mrt_lock);
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return 0;
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}
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@ -849,8 +847,8 @@ static void mroute_clean_tables(struct sock *sk)
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/*
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* Shut down all active vif entries
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*/
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for (i=0; i<maxvif; i++) {
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if (!(vif_table[i].flags&VIFF_STATIC))
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for (i = 0; i < init_net.ipv4.maxvif; i++) {
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if (!(init_net.ipv4.vif_table[i].flags&VIFF_STATIC))
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vif_delete(i, 0);
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}
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@ -1088,11 +1086,11 @@ int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
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case SIOCGETVIFCNT:
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if (copy_from_user(&vr, arg, sizeof(vr)))
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return -EFAULT;
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if (vr.vifi >= maxvif)
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if (vr.vifi >= init_net.ipv4.maxvif)
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return -EINVAL;
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read_lock(&mrt_lock);
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vif=&vif_table[vr.vifi];
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if (VIF_EXISTS(vr.vifi)) {
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vif = &init_net.ipv4.vif_table[vr.vifi];
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if (VIF_EXISTS(&init_net, vr.vifi)) {
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vr.icount = vif->pkt_in;
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vr.ocount = vif->pkt_out;
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vr.ibytes = vif->bytes_in;
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@ -1140,8 +1138,8 @@ static int ipmr_device_event(struct notifier_block *this, unsigned long event, v
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if (event != NETDEV_UNREGISTER)
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return NOTIFY_DONE;
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v=&vif_table[0];
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for (ct=0; ct<maxvif; ct++,v++) {
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v = &init_net.ipv4.vif_table[0];
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for (ct = 0; ct < init_net.ipv4.maxvif; ct++, v++) {
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if (v->dev == dev)
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vif_delete(ct, 1);
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}
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@ -1204,7 +1202,7 @@ static inline int ipmr_forward_finish(struct sk_buff *skb)
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static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
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{
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const struct iphdr *iph = ip_hdr(skb);
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struct vif_device *vif = &vif_table[vifi];
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struct vif_device *vif = &init_net.ipv4.vif_table[vifi];
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struct net_device *dev;
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struct rtable *rt;
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int encap = 0;
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@ -1305,8 +1303,8 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
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static int ipmr_find_vif(struct net_device *dev)
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{
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int ct;
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for (ct=maxvif-1; ct>=0; ct--) {
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if (vif_table[ct].dev == dev)
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for (ct = init_net.ipv4.maxvif-1; ct >= 0; ct--) {
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if (init_net.ipv4.vif_table[ct].dev == dev)
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break;
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}
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return ct;
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@ -1326,7 +1324,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
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/*
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* Wrong interface: drop packet and (maybe) send PIM assert.
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*/
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if (vif_table[vif].dev != skb->dev) {
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if (init_net.ipv4.vif_table[vif].dev != skb->dev) {
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int true_vifi;
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if (skb->rtable->fl.iif == 0) {
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@ -1362,8 +1360,8 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
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goto dont_forward;
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}
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vif_table[vif].pkt_in++;
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vif_table[vif].bytes_in += skb->len;
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init_net.ipv4.vif_table[vif].pkt_in++;
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init_net.ipv4.vif_table[vif].bytes_in += skb->len;
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/*
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* Forward the frame
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@ -1500,7 +1498,7 @@ static int __pim_rcv(struct sk_buff *skb, unsigned int pimlen)
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read_lock(&mrt_lock);
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if (reg_vif_num >= 0)
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reg_dev = vif_table[reg_vif_num].dev;
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reg_dev = init_net.ipv4.vif_table[reg_vif_num].dev;
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if (reg_dev)
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dev_hold(reg_dev);
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read_unlock(&mrt_lock);
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@ -1581,7 +1579,7 @@ ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm)
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{
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int ct;
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struct rtnexthop *nhp;
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struct net_device *dev = vif_table[c->mfc_parent].dev;
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struct net_device *dev = init_net.ipv4.vif_table[c->mfc_parent].dev;
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u8 *b = skb_tail_pointer(skb);
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struct rtattr *mp_head;
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@ -1597,7 +1595,7 @@ ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm)
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nhp = (struct rtnexthop *)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
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nhp->rtnh_flags = 0;
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nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
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nhp->rtnh_ifindex = vif_table[ct].dev->ifindex;
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nhp->rtnh_ifindex = init_net.ipv4.vif_table[ct].dev->ifindex;
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nhp->rtnh_len = sizeof(*nhp);
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}
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}
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@ -1672,11 +1670,11 @@ struct ipmr_vif_iter {
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static struct vif_device *ipmr_vif_seq_idx(struct ipmr_vif_iter *iter,
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loff_t pos)
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{
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for (iter->ct = 0; iter->ct < maxvif; ++iter->ct) {
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if (!VIF_EXISTS(iter->ct))
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for (iter->ct = 0; iter->ct < init_net.ipv4.maxvif; ++iter->ct) {
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if (!VIF_EXISTS(&init_net, iter->ct))
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continue;
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if (pos-- == 0)
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return &vif_table[iter->ct];
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return &init_net.ipv4.vif_table[iter->ct];
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}
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return NULL;
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}
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@ -1697,10 +1695,10 @@ static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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if (v == SEQ_START_TOKEN)
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return ipmr_vif_seq_idx(iter, 0);
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while (++iter->ct < maxvif) {
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if (!VIF_EXISTS(iter->ct))
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while (++iter->ct < init_net.ipv4.maxvif) {
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if (!VIF_EXISTS(&init_net, iter->ct))
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continue;
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return &vif_table[iter->ct];
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return &init_net.ipv4.vif_table[iter->ct];
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}
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return NULL;
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}
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@ -1722,7 +1720,7 @@ static int ipmr_vif_seq_show(struct seq_file *seq, void *v)
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seq_printf(seq,
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"%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n",
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vif - vif_table,
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vif - init_net.ipv4.vif_table,
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name, vif->bytes_in, vif->pkt_in,
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vif->bytes_out, vif->pkt_out,
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vif->flags, vif->local, vif->remote);
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@ -1864,9 +1862,9 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
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mfc->mfc_un.res.wrong_if);
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for (n = mfc->mfc_un.res.minvif;
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n < mfc->mfc_un.res.maxvif; n++ ) {
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if (VIF_EXISTS(n)
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&& mfc->mfc_un.res.ttls[n] < 255)
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seq_printf(seq,
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if (VIF_EXISTS(&init_net, n) &&
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mfc->mfc_un.res.ttls[n] < 255)
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seq_printf(seq,
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" %2d:%-3d",
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n, mfc->mfc_un.res.ttls[n]);
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}
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@ -1913,6 +1911,29 @@ static struct net_protocol pim_protocol = {
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/*
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* Setup for IP multicast routing
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*/
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static int __net_init ipmr_net_init(struct net *net)
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{
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int err = 0;
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net->ipv4.vif_table = kcalloc(MAXVIFS, sizeof(struct vif_device),
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GFP_KERNEL);
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if (!net->ipv4.vif_table) {
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err = -ENOMEM;
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goto fail;
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}
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fail:
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return err;
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}
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static void __net_exit ipmr_net_exit(struct net *net)
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{
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kfree(net->ipv4.vif_table);
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}
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static struct pernet_operations ipmr_net_ops = {
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.init = ipmr_net_init,
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.exit = ipmr_net_exit,
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};
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int __init ip_mr_init(void)
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{
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@ -1925,6 +1946,10 @@ int __init ip_mr_init(void)
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if (!mrt_cachep)
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return -ENOMEM;
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err = register_pernet_subsys(&ipmr_net_ops);
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if (err)
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goto reg_pernet_fail;
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setup_timer(&ipmr_expire_timer, ipmr_expire_process, 0);
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err = register_netdevice_notifier(&ip_mr_notifier);
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if (err)
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@ -1945,6 +1970,8 @@ int __init ip_mr_init(void)
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#endif
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reg_notif_fail:
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del_timer(&ipmr_expire_timer);
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unregister_pernet_subsys(&ipmr_net_ops);
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reg_pernet_fail:
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kmem_cache_destroy(mrt_cachep);
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return err;
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}
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