return NULL;
}
+/* Look for a (*,*,oif) entry */
+static struct mfc_cache *ipmr_cache_find_any_parent(struct mr_table *mrt,
+ int vifi)
+{
+ int line = MFC_HASH(htonl(INADDR_ANY), htonl(INADDR_ANY));
+ struct mfc_cache *c;
+
+ list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list)
+ if (c->mfc_origin == htonl(INADDR_ANY) &&
+ c->mfc_mcastgrp == htonl(INADDR_ANY) &&
+ c->mfc_un.res.ttls[vifi] < 255)
+ return c;
+
+ return NULL;
+}
+
+/* Look for a (*,G) entry */
+static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt,
+ __be32 mcastgrp, int vifi)
+{
+ int line = MFC_HASH(mcastgrp, htonl(INADDR_ANY));
+ struct mfc_cache *c, *proxy;
+
+ if (mcastgrp == htonl(INADDR_ANY))
+ goto skip;
+
+ list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list)
+ if (c->mfc_origin == htonl(INADDR_ANY) &&
+ c->mfc_mcastgrp == mcastgrp) {
+ if (c->mfc_un.res.ttls[vifi] < 255)
+ return c;
+
+ /* It's ok if the vifi is part of the static tree */
+ proxy = ipmr_cache_find_any_parent(mrt,
+ c->mfc_parent);
+ if (proxy && proxy->mfc_un.res.ttls[vifi] < 255)
+ return c;
+ }
+
+skip:
+ return ipmr_cache_find_any_parent(mrt, vifi);
+}
+
/*
* Allocate a multicast cache entry
*/
* MFC cache manipulation by user space mroute daemon
*/
-static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc)
+static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent)
{
int line;
struct mfc_cache *c, *next;
list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[line], list) {
if (c->mfc_origin == mfc->mfcc_origin.s_addr &&
- c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) {
+ c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr &&
+ (parent == -1 || parent == c->mfc_parent)) {
list_del_rcu(&c->list);
mroute_netlink_event(mrt, c, RTM_DELROUTE);
ipmr_cache_free(c);
}
static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
- struct mfcctl *mfc, int mrtsock)
+ struct mfcctl *mfc, int mrtsock, int parent)
{
bool found = false;
int line;
list_for_each_entry(c, &mrt->mfc_cache_array[line], list) {
if (c->mfc_origin == mfc->mfcc_origin.s_addr &&
- c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) {
+ c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr &&
+ (parent == -1 || parent == c->mfc_parent)) {
found = true;
break;
}
return 0;
}
- if (!ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr))
+ if (mfc->mfcc_mcastgrp.s_addr != htonl(INADDR_ANY) &&
+ !ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr))
return -EINVAL;
c = ipmr_cache_alloc();
int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
{
- int ret;
+ int ret, parent = 0;
struct vifctl vif;
struct mfcctl mfc;
struct net *net = sock_net(sk);
*/
case MRT_ADD_MFC:
case MRT_DEL_MFC:
+ parent = -1;
+ case MRT_ADD_MFC_PROXY:
+ case MRT_DEL_MFC_PROXY:
if (optlen != sizeof(mfc))
return -EINVAL;
if (copy_from_user(&mfc, optval, sizeof(mfc)))
return -EFAULT;
+ if (parent == 0)
+ parent = mfc.mfcc_parent;
rtnl_lock();
- if (optname == MRT_DEL_MFC)
- ret = ipmr_mfc_delete(mrt, &mfc);
+ if (optname == MRT_DEL_MFC || optname == MRT_DEL_MFC_PROXY)
+ ret = ipmr_mfc_delete(mrt, &mfc, parent);
else
ret = ipmr_mfc_add(net, mrt, &mfc,
- sk == rtnl_dereference(mrt->mroute_sk));
+ sk == rtnl_dereference(mrt->mroute_sk),
+ parent);
rtnl_unlock();
return ret;
/*
{
int psend = -1;
int vif, ct;
+ int true_vifi = ipmr_find_vif(mrt, skb->dev);
vif = cache->mfc_parent;
cache->mfc_un.res.pkt++;
cache->mfc_un.res.bytes += skb->len;
+ if (cache->mfc_origin == htonl(INADDR_ANY) && true_vifi >= 0) {
+ struct mfc_cache *cache_proxy;
+
+ /* For an (*,G) entry, we only check that the incomming
+ * interface is part of the static tree.
+ */
+ cache_proxy = ipmr_cache_find_any_parent(mrt, vif);
+ if (cache_proxy &&
+ cache_proxy->mfc_un.res.ttls[true_vifi] < 255)
+ goto forward;
+ }
+
/*
* Wrong interface: drop packet and (maybe) send PIM assert.
*/
if (mrt->vif_table[vif].dev != skb->dev) {
- int true_vifi;
-
if (rt_is_output_route(skb_rtable(skb))) {
/* It is our own packet, looped back.
* Very complicated situation...
}
cache->mfc_un.res.wrong_if++;
- true_vifi = ipmr_find_vif(mrt, skb->dev);
if (true_vifi >= 0 && mrt->mroute_do_assert &&
/* pimsm uses asserts, when switching from RPT to SPT,
goto dont_forward;
}
+forward:
mrt->vif_table[vif].pkt_in++;
mrt->vif_table[vif].bytes_in += skb->len;
/*
* Forward the frame
*/
+ if (cache->mfc_origin == htonl(INADDR_ANY) &&
+ cache->mfc_mcastgrp == htonl(INADDR_ANY)) {
+ if (true_vifi >= 0 &&
+ true_vifi != cache->mfc_parent &&
+ ip_hdr(skb)->ttl >
+ cache->mfc_un.res.ttls[cache->mfc_parent]) {
+ /* It's an (*,*) entry and the packet is not coming from
+ * the upstream: forward the packet to the upstream
+ * only.
+ */
+ psend = cache->mfc_parent;
+ goto last_forward;
+ }
+ goto dont_forward;
+ }
for (ct = cache->mfc_un.res.maxvif - 1;
ct >= cache->mfc_un.res.minvif; ct--) {
- if (ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) {
+ /* For (*,G) entry, don't forward to the incoming interface */
+ if ((cache->mfc_origin != htonl(INADDR_ANY) ||
+ ct != true_vifi) &&
+ ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) {
if (psend != -1) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
psend = ct;
}
}
+last_forward:
if (psend != -1) {
if (local) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
/* already under rcu_read_lock() */
cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
+ if (cache == NULL) {
+ int vif = ipmr_find_vif(mrt, skb->dev);
+
+ if (vif >= 0)
+ cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr,
+ vif);
+ }
/*
* No usable cache entry
rcu_read_lock();
cache = ipmr_cache_find(mrt, saddr, daddr);
+ if (cache == NULL && skb->dev) {
+ int vif = ipmr_find_vif(mrt, skb->dev);
+ if (vif >= 0)
+ cache = ipmr_cache_find_any(mrt, daddr, vif);
+ }
if (cache == NULL) {
struct sk_buff *skb2;
struct iphdr *iph;
#ifdef CONFIG_PROC_FS
err = -ENOMEM;
- if (!proc_net_fops_create(net, "ip_mr_vif", 0, &ipmr_vif_fops))
+ if (!proc_create("ip_mr_vif", 0, net->proc_net, &ipmr_vif_fops))
goto proc_vif_fail;
- if (!proc_net_fops_create(net, "ip_mr_cache", 0, &ipmr_mfc_fops))
+ if (!proc_create("ip_mr_cache", 0, net->proc_net, &ipmr_mfc_fops))
goto proc_cache_fail;
#endif
return 0;
#ifdef CONFIG_PROC_FS
proc_cache_fail:
- proc_net_remove(net, "ip_mr_vif");
+ remove_proc_entry("ip_mr_vif", net->proc_net);
proc_vif_fail:
ipmr_rules_exit(net);
#endif
static void __net_exit ipmr_net_exit(struct net *net)
{
#ifdef CONFIG_PROC_FS
- proc_net_remove(net, "ip_mr_cache");
- proc_net_remove(net, "ip_mr_vif");
+ remove_proc_entry("ip_mr_cache", net->proc_net);
+ remove_proc_entry("ip_mr_vif", net->proc_net);
#endif
ipmr_rules_exit(net);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff