forked from Minki/linux
net: Make dst_alloc() take more explicit initializations.
Now the dst->dev, dev->obsolete, and dst->flags values can be specified as well. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
778865a550
commit
5c1e6aa300
@ -350,7 +350,8 @@ static inline struct dst_entry *skb_dst_pop(struct sk_buff *skb)
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}
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extern int dst_discard(struct sk_buff *skb);
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extern void *dst_alloc(struct dst_ops * ops, int initial_ref);
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extern void *dst_alloc(struct dst_ops * ops, struct net_device *dev,
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int initial_ref, int initial_obsolete, int flags);
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extern void __dst_free(struct dst_entry * dst);
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extern struct dst_entry *dst_destroy(struct dst_entry * dst);
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@ -166,7 +166,8 @@ EXPORT_SYMBOL(dst_discard);
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const u32 dst_default_metrics[RTAX_MAX];
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void *dst_alloc(struct dst_ops *ops, int initial_ref)
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void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
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int initial_ref, int initial_obsolete, int flags)
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{
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struct dst_entry *dst;
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@ -177,12 +178,19 @@ void *dst_alloc(struct dst_ops *ops, int initial_ref)
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dst = kmem_cache_zalloc(ops->kmem_cachep, GFP_ATOMIC);
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if (!dst)
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return NULL;
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atomic_set(&dst->__refcnt, initial_ref);
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dst->ops = ops;
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dst->lastuse = jiffies;
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dst->path = dst;
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dst->input = dst->output = dst_discard;
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dst->dev = dev;
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if (dev)
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dev_hold(dev);
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dst_init_metrics(dst, dst_default_metrics, true);
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dst->path = dst;
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dst->input = dst_discard;
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dst->output = dst_discard;
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dst->obsolete = initial_obsolete;
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atomic_set(&dst->__refcnt, initial_ref);
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dst->lastuse = jiffies;
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dst->flags = flags;
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#if RT_CACHE_DEBUG >= 2
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atomic_inc(&dst_total);
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#endif
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@ -1125,13 +1125,10 @@ make_route:
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if (dev_out->flags & IFF_LOOPBACK)
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flags |= RTCF_LOCAL;
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rt = dst_alloc(&dn_dst_ops, 0);
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rt = dst_alloc(&dn_dst_ops, dev_out, 1, 0, DST_HOST);
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if (rt == NULL)
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goto e_nobufs;
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atomic_set(&rt->dst.__refcnt, 1);
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rt->dst.flags = DST_HOST;
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rt->fld.saddr = oldflp->saddr;
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rt->fld.daddr = oldflp->daddr;
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rt->fld.flowidn_oif = oldflp->flowidn_oif;
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@ -1146,8 +1143,6 @@ make_route:
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rt->rt_dst_map = fld.daddr;
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rt->rt_src_map = fld.saddr;
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rt->dst.dev = dev_out;
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dev_hold(dev_out);
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rt->dst.neighbour = neigh;
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neigh = NULL;
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@ -1399,7 +1394,7 @@ static int dn_route_input_slow(struct sk_buff *skb)
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}
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make_route:
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rt = dst_alloc(&dn_dst_ops, 0);
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rt = dst_alloc(&dn_dst_ops, out_dev, 0, 0, DST_HOST);
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if (rt == NULL)
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goto e_nobufs;
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@ -1419,9 +1414,7 @@ make_route:
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rt->fld.flowidn_iif = in_dev->ifindex;
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rt->fld.flowidn_mark = fld.flowidn_mark;
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rt->dst.flags = DST_HOST;
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rt->dst.neighbour = neigh;
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rt->dst.dev = out_dev;
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rt->dst.lastuse = jiffies;
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rt->dst.output = dn_rt_bug;
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switch(res.type) {
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@ -1440,8 +1433,6 @@ make_route:
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rt->dst.input = dst_discard;
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}
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rt->rt_flags = flags;
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if (rt->dst.dev)
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dev_hold(rt->dst.dev);
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err = dn_rt_set_next_hop(rt, &res);
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if (err)
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@ -1833,17 +1833,13 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
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rt->rt_type = type;
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}
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static struct rtable *rt_dst_alloc(bool nopolicy, bool noxfrm)
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static struct rtable *rt_dst_alloc(struct net_device *dev,
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bool nopolicy, bool noxfrm)
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{
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struct rtable *rt = dst_alloc(&ipv4_dst_ops, 1);
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if (rt) {
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rt->dst.obsolete = -1;
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rt->dst.flags = DST_HOST |
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(nopolicy ? DST_NOPOLICY : 0) |
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(noxfrm ? DST_NOXFRM : 0);
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}
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return rt;
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return dst_alloc(&ipv4_dst_ops, dev, 1, -1,
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DST_HOST |
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(nopolicy ? DST_NOPOLICY : 0) |
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(noxfrm ? DST_NOXFRM : 0));
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}
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/* called in rcu_read_lock() section */
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@ -1876,7 +1872,8 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
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if (err < 0)
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goto e_err;
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}
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rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
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rth = rt_dst_alloc(init_net.loopback_dev,
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IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
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if (!rth)
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goto e_nobufs;
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@ -1893,8 +1890,6 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
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#endif
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rth->rt_route_iif = dev->ifindex;
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rth->rt_iif = dev->ifindex;
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rth->dst.dev = init_net.loopback_dev;
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dev_hold(rth->dst.dev);
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rth->rt_oif = 0;
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rth->rt_gateway = daddr;
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rth->rt_spec_dst= spec_dst;
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@ -2013,7 +2008,8 @@ static int __mkroute_input(struct sk_buff *skb,
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}
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}
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rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY),
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rth = rt_dst_alloc(out_dev->dev,
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IN_DEV_CONF_GET(in_dev, NOPOLICY),
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IN_DEV_CONF_GET(out_dev, NOXFRM));
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if (!rth) {
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err = -ENOBUFS;
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@ -2029,8 +2025,6 @@ static int __mkroute_input(struct sk_buff *skb,
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rth->rt_gateway = daddr;
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rth->rt_route_iif = in_dev->dev->ifindex;
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rth->rt_iif = in_dev->dev->ifindex;
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rth->dst.dev = (out_dev)->dev;
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dev_hold(rth->dst.dev);
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rth->rt_oif = 0;
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rth->rt_spec_dst= spec_dst;
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@ -2188,7 +2182,8 @@ brd_input:
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RT_CACHE_STAT_INC(in_brd);
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local_input:
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rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
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rth = rt_dst_alloc(net->loopback_dev,
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IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
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if (!rth)
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goto e_nobufs;
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@ -2206,8 +2201,6 @@ local_input:
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#endif
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rth->rt_route_iif = dev->ifindex;
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rth->rt_iif = dev->ifindex;
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rth->dst.dev = net->loopback_dev;
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dev_hold(rth->dst.dev);
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rth->rt_gateway = daddr;
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rth->rt_spec_dst= spec_dst;
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rth->dst.input= ip_local_deliver;
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@ -2392,7 +2385,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
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fi = NULL;
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}
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rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY),
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rth = rt_dst_alloc(dev_out,
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IN_DEV_CONF_GET(in_dev, NOPOLICY),
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IN_DEV_CONF_GET(in_dev, NOXFRM));
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if (!rth)
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return ERR_PTR(-ENOBUFS);
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@ -2406,10 +2400,6 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
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rth->rt_src = fl4->saddr;
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rth->rt_route_iif = 0;
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rth->rt_iif = oldflp4->flowi4_oif ? : dev_out->ifindex;
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/* get references to the devices that are to be hold by the routing
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cache entry */
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rth->dst.dev = dev_out;
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dev_hold(dev_out);
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rth->rt_gateway = fl4->daddr;
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rth->rt_spec_dst= fl4->saddr;
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@ -2711,7 +2701,7 @@ static struct dst_ops ipv4_dst_blackhole_ops = {
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struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig)
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{
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struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, 1);
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struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, 0, 0);
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struct rtable *ort = (struct rtable *) dst_orig;
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if (rt) {
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@ -227,9 +227,10 @@ static struct rt6_info ip6_blk_hole_entry_template = {
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#endif
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/* allocate dst with ip6_dst_ops */
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static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops)
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static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops,
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struct net_device *dev)
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{
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return (struct rt6_info *)dst_alloc(ops, 0);
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return (struct rt6_info *)dst_alloc(ops, dev, 0, 0, 0);
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}
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static void ip6_dst_destroy(struct dst_entry *dst)
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@ -881,10 +882,10 @@ EXPORT_SYMBOL(ip6_route_output);
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struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
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{
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struct rt6_info *rt = dst_alloc(&ip6_dst_blackhole_ops, 1);
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struct rt6_info *ort = (struct rt6_info *) dst_orig;
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struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig;
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struct dst_entry *new = NULL;
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rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, 0, 0);
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if (rt) {
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new = &rt->dst;
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@ -893,9 +894,6 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
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new->output = dst_discard;
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dst_copy_metrics(new, &ort->dst);
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new->dev = ort->dst.dev;
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if (new->dev)
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dev_hold(new->dev);
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rt->rt6i_idev = ort->rt6i_idev;
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if (rt->rt6i_idev)
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in6_dev_hold(rt->rt6i_idev);
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@ -1038,13 +1036,12 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
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if (unlikely(idev == NULL))
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return NULL;
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rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
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rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, dev);
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if (unlikely(rt == NULL)) {
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in6_dev_put(idev);
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goto out;
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}
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dev_hold(dev);
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if (neigh)
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neigh_hold(neigh);
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else {
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@ -1053,7 +1050,6 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
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neigh = NULL;
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}
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rt->rt6i_dev = dev;
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rt->rt6i_idev = idev;
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rt->rt6i_nexthop = neigh;
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atomic_set(&rt->dst.__refcnt, 1);
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@ -1212,7 +1208,7 @@ int ip6_route_add(struct fib6_config *cfg)
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goto out;
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}
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rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
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rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, NULL);
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if (rt == NULL) {
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err = -ENOMEM;
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@ -1731,7 +1727,8 @@ void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *sad
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static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
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{
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struct net *net = dev_net(ort->rt6i_dev);
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struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
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struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops,
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ort->dst.dev);
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if (rt) {
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rt->dst.input = ort->dst.input;
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@ -1739,9 +1736,6 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
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dst_copy_metrics(&rt->dst, &ort->dst);
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rt->dst.error = ort->dst.error;
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rt->dst.dev = ort->dst.dev;
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if (rt->dst.dev)
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dev_hold(rt->dst.dev);
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rt->rt6i_idev = ort->rt6i_idev;
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if (rt->rt6i_idev)
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in6_dev_hold(rt->rt6i_idev);
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@ -2011,7 +2005,8 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
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int anycast)
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{
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struct net *net = dev_net(idev->dev);
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struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
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struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops,
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net->loopback_dev);
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struct neighbour *neigh;
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if (rt == NULL) {
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@ -2021,13 +2016,11 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
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return ERR_PTR(-ENOMEM);
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}
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dev_hold(net->loopback_dev);
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in6_dev_hold(idev);
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rt->dst.flags = DST_HOST;
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rt->dst.input = ip6_input;
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rt->dst.output = ip6_output;
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rt->rt6i_dev = net->loopback_dev;
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rt->rt6i_idev = idev;
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rt->dst.obsolete = -1;
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@ -1348,7 +1348,7 @@ static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family)
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default:
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BUG();
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}
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xdst = dst_alloc(dst_ops, 0);
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xdst = dst_alloc(dst_ops, NULL, 0, 0, 0);
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xfrm_policy_put_afinfo(afinfo);
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if (likely(xdst))
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