ipv6: ip6mr: remove net pointer from struct mfc6_cache
Now that cache entries in unres_queue don't need to be distinguished by their network namespace pointer anymore, we can remove it from struct mfc6_cache add pass the namespace as function argument to the functions that need it. Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
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c476efbcde
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b5aa30b191
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@ -183,9 +183,6 @@ struct mif_device {
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struct mfc6_cache {
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struct mfc6_cache *next; /* Next entry on cache line */
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#ifdef CONFIG_NET_NS
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struct net *mfc6_net;
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#endif
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struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
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struct in6_addr mf6c_origin; /* Source of packet */
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mifi_t mf6c_parent; /* Source interface */
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@ -208,18 +205,6 @@ struct mfc6_cache {
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} mfc_un;
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};
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static inline
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struct net *mfc6_net(const struct mfc6_cache *mfc)
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{
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return read_pnet(&mfc->mfc6_net);
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}
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static inline
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void mfc6_net_set(struct mfc6_cache *mfc, struct net *net)
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{
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write_pnet(&mfc->mfc6_net, hold_net(net));
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}
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#define MFC_STATIC 1
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#define MFC_NOTIFY 2
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@ -76,10 +76,12 @@ static DEFINE_SPINLOCK(mfc_unres_lock);
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static struct kmem_cache *mrt_cachep __read_mostly;
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static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache);
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static int ip6_mr_forward(struct net *net, struct sk_buff *skb,
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struct mfc6_cache *cache);
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static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt,
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mifi_t mifi, int assert);
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static int ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm);
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static int ip6mr_fill_mroute(struct net *net, struct sk_buff *skb,
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struct mfc6_cache *c, struct rtmsg *rtm);
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static void mroute_clean_tables(struct net *net);
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@ -523,7 +525,6 @@ static int mif6_delete(struct net *net, int vifi, struct list_head *head)
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static inline void ip6mr_cache_free(struct mfc6_cache *c)
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{
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release_net(mfc6_net(c));
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kmem_cache_free(mrt_cachep, c);
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}
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@ -531,10 +532,9 @@ static inline void ip6mr_cache_free(struct mfc6_cache *c)
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and reporting error to netlink readers.
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*/
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static void ip6mr_destroy_unres(struct mfc6_cache *c)
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static void ip6mr_destroy_unres(struct net *net, struct mfc6_cache *c)
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{
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struct sk_buff *skb;
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struct net *net = mfc6_net(c);
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atomic_dec(&net->ipv6.cache_resolve_queue_len);
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@ -575,7 +575,7 @@ static void ipmr_do_expire_process(struct net *net)
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}
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*cp = c->next;
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ip6mr_destroy_unres(c);
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ip6mr_destroy_unres(net, c);
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}
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if (net->ipv6.mfc6_unres_queue != NULL)
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@ -599,10 +599,10 @@ static void ipmr_expire_process(unsigned long arg)
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/* Fill oifs list. It is called under write locked mrt_lock. */
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static void ip6mr_update_thresholds(struct mfc6_cache *cache, unsigned char *ttls)
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static void ip6mr_update_thresholds(struct net *net, struct mfc6_cache *cache,
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unsigned char *ttls)
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{
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int vifi;
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struct net *net = mfc6_net(cache);
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cache->mfc_un.res.minvif = MAXMIFS;
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cache->mfc_un.res.maxvif = 0;
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@ -717,24 +717,22 @@ static struct mfc6_cache *ip6mr_cache_find(struct net *net,
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/*
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* Allocate a multicast cache entry
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*/
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static struct mfc6_cache *ip6mr_cache_alloc(struct net *net)
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static struct mfc6_cache *ip6mr_cache_alloc(void)
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{
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struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
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if (c == NULL)
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return NULL;
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c->mfc_un.res.minvif = MAXMIFS;
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mfc6_net_set(c, net);
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return c;
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}
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static struct mfc6_cache *ip6mr_cache_alloc_unres(struct net *net)
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static struct mfc6_cache *ip6mr_cache_alloc_unres(void)
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{
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struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
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if (c == NULL)
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return NULL;
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skb_queue_head_init(&c->mfc_un.unres.unresolved);
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c->mfc_un.unres.expires = jiffies + 10 * HZ;
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mfc6_net_set(c, net);
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return c;
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}
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@ -742,7 +740,8 @@ static struct mfc6_cache *ip6mr_cache_alloc_unres(struct net *net)
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* A cache entry has gone into a resolved state from queued
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*/
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static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
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static void ip6mr_cache_resolve(struct net *net, struct mfc6_cache *uc,
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struct mfc6_cache *c)
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{
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struct sk_buff *skb;
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@ -755,7 +754,7 @@ static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
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int err;
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struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
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if (ip6mr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) {
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if (ip6mr_fill_mroute(net, skb, c, NLMSG_DATA(nlh)) > 0) {
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nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh;
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} else {
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nlh->nlmsg_type = NLMSG_ERROR;
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@ -763,9 +762,9 @@ static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
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skb_trim(skb, nlh->nlmsg_len);
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((struct nlmsgerr *)NLMSG_DATA(nlh))->error = -EMSGSIZE;
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}
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err = rtnl_unicast(skb, mfc6_net(uc), NETLINK_CB(skb).pid);
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err = rtnl_unicast(skb, net, NETLINK_CB(skb).pid);
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} else
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ip6_mr_forward(skb, c);
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ip6_mr_forward(net, skb, c);
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}
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}
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@ -889,7 +888,7 @@ ip6mr_cache_unresolved(struct net *net, mifi_t mifi, struct sk_buff *skb)
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*/
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if (atomic_read(&net->ipv6.cache_resolve_queue_len) >= 10 ||
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(c = ip6mr_cache_alloc_unres(net)) == NULL) {
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(c = ip6mr_cache_alloc_unres()) == NULL) {
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spin_unlock_bh(&mfc_unres_lock);
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kfree_skb(skb);
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@ -1133,7 +1132,7 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
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if (c != NULL) {
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write_lock_bh(&mrt_lock);
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c->mf6c_parent = mfc->mf6cc_parent;
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ip6mr_update_thresholds(c, ttls);
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ip6mr_update_thresholds(net, c, ttls);
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if (!mrtsock)
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c->mfc_flags |= MFC_STATIC;
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write_unlock_bh(&mrt_lock);
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@ -1143,14 +1142,14 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
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if (!ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr))
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return -EINVAL;
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c = ip6mr_cache_alloc(net);
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c = ip6mr_cache_alloc();
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if (c == NULL)
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return -ENOMEM;
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c->mf6c_origin = mfc->mf6cc_origin.sin6_addr;
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c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr;
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c->mf6c_parent = mfc->mf6cc_parent;
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ip6mr_update_thresholds(c, ttls);
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ip6mr_update_thresholds(net, c, ttls);
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if (!mrtsock)
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c->mfc_flags |= MFC_STATIC;
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@ -1178,7 +1177,7 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
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spin_unlock_bh(&mfc_unres_lock);
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if (uc) {
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ip6mr_cache_resolve(uc, c);
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ip6mr_cache_resolve(net, uc, c);
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ip6mr_cache_free(uc);
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}
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return 0;
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@ -1229,7 +1228,7 @@ static void mroute_clean_tables(struct net *net)
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cp = &net->ipv6.mfc6_unres_queue;
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while ((c = *cp) != NULL) {
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*cp = c->next;
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ip6mr_destroy_unres(c);
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ip6mr_destroy_unres(net, c);
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}
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spin_unlock_bh(&mfc_unres_lock);
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}
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@ -1497,10 +1496,10 @@ static inline int ip6mr_forward2_finish(struct sk_buff *skb)
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* Processing handlers for ip6mr_forward
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*/
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static int ip6mr_forward2(struct sk_buff *skb, struct mfc6_cache *c, int vifi)
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static int ip6mr_forward2(struct net *net, struct sk_buff *skb,
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struct mfc6_cache *c, int vifi)
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{
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struct ipv6hdr *ipv6h;
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struct net *net = mfc6_net(c);
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struct mif_device *vif = &net->ipv6.vif6_table[vifi];
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struct net_device *dev;
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struct dst_entry *dst;
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@ -1581,11 +1580,11 @@ static int ip6mr_find_vif(struct net_device *dev)
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return ct;
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}
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static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache)
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static int ip6_mr_forward(struct net *net, struct sk_buff *skb,
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struct mfc6_cache *cache)
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{
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int psend = -1;
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int vif, ct;
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struct net *net = mfc6_net(cache);
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vif = cache->mf6c_parent;
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cache->mfc_un.res.pkt++;
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@ -1627,13 +1626,13 @@ static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache)
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if (psend != -1) {
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struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
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if (skb2)
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ip6mr_forward2(skb2, cache, psend);
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ip6mr_forward2(net, skb2, cache, psend);
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}
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psend = ct;
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}
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}
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if (psend != -1) {
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ip6mr_forward2(skb, cache, psend);
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ip6mr_forward2(net, skb, cache, psend);
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return 0;
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}
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@ -1674,7 +1673,7 @@ int ip6_mr_input(struct sk_buff *skb)
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return -ENODEV;
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}
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ip6_mr_forward(skb, cache);
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ip6_mr_forward(net, skb, cache);
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read_unlock(&mrt_lock);
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@ -1683,11 +1682,11 @@ int ip6_mr_input(struct sk_buff *skb)
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static int
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ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm)
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ip6mr_fill_mroute(struct net *net, struct sk_buff *skb, struct mfc6_cache *c,
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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 *net = mfc6_net(c);
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u8 *b = skb_tail_pointer(skb);
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struct rtattr *mp_head;
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@ -1781,7 +1780,7 @@ int ip6mr_get_route(struct net *net,
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if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY))
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cache->mfc_flags |= MFC_NOTIFY;
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err = ip6mr_fill_mroute(skb, cache, rtm);
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err = ip6mr_fill_mroute(net, skb, cache, rtm);
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read_unlock(&mrt_lock);
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return err;
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}
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