*
* IPv4 Forwarding Information Base: FIB frontend.
*
- * Version: $Id: fib_frontend.c,v 1.26 2001/10/31 21:55:54 davem Exp $
- *
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* This program is free software; you can redistribute it and/or
* 2 of the License, or (at your option) any later version.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/bitops.h>
+#include <linux/capability.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/inet.h>
+#include <linux/inetdevice.h>
#include <linux/netdevice.h>
+#include <linux/if_addr.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
-#include <linux/netlink.h>
#include <linux/init.h>
+#include <linux/list.h>
#include <net/ip.h>
#include <net/protocol.h>
#include <net/route.h>
#include <net/tcp.h>
#include <net/sock.h>
-#include <net/icmp.h>
#include <net/arp.h>
#include <net/ip_fib.h>
-
-#define FFprint(a...) printk(KERN_DEBUG a)
+#include <net/rtnetlink.h>
#ifndef CONFIG_IP_MULTIPLE_TABLES
-#define RT_TABLE_MIN RT_TABLE_MAIN
+static int __net_init fib4_rules_init(struct net *net)
+{
+ struct fib_table *local_table, *main_table;
-struct fib_table *ip_fib_local_table;
-struct fib_table *ip_fib_main_table;
+ local_table = fib_hash_table(RT_TABLE_LOCAL);
+ if (local_table == NULL)
+ return -ENOMEM;
-#else
+ main_table = fib_hash_table(RT_TABLE_MAIN);
+ if (main_table == NULL)
+ goto fail;
-#define RT_TABLE_MIN 1
+ hlist_add_head_rcu(&local_table->tb_hlist,
+ &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]);
+ hlist_add_head_rcu(&main_table->tb_hlist,
+ &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]);
+ return 0;
-struct fib_table *fib_tables[RT_TABLE_MAX+1];
+fail:
+ kfree(local_table);
+ return -ENOMEM;
+}
+#else
-struct fib_table *__fib_new_table(int id)
+struct fib_table *fib_new_table(struct net *net, u32 id)
{
struct fib_table *tb;
+ unsigned int h;
+
+ if (id == 0)
+ id = RT_TABLE_MAIN;
+ tb = fib_get_table(net, id);
+ if (tb)
+ return tb;
- tb = fib_hash_init(id);
+ tb = fib_hash_table(id);
if (!tb)
return NULL;
- fib_tables[id] = tb;
+ h = id & (FIB_TABLE_HASHSZ - 1);
+ hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]);
return tb;
}
+struct fib_table *fib_get_table(struct net *net, u32 id)
+{
+ struct fib_table *tb;
+ struct hlist_node *node;
+ struct hlist_head *head;
+ unsigned int h;
+
+ if (id == 0)
+ id = RT_TABLE_MAIN;
+ h = id & (FIB_TABLE_HASHSZ - 1);
+ rcu_read_lock();
+ head = &net->ipv4.fib_table_hash[h];
+ hlist_for_each_entry_rcu(tb, node, head, tb_hlist) {
+ if (tb->tb_id == id) {
+ rcu_read_unlock();
+ return tb;
+ }
+ }
+ rcu_read_unlock();
+ return NULL;
+}
#endif /* CONFIG_IP_MULTIPLE_TABLES */
+void fib_select_default(struct net *net,
+ const struct flowi *flp, struct fib_result *res)
+{
+ struct fib_table *tb;
+ int table = RT_TABLE_MAIN;
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+ if (res->r == NULL || res->r->action != FR_ACT_TO_TBL)
+ return;
+ table = res->r->table;
+#endif
+ tb = fib_get_table(net, table);
+ if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
+ fib_table_select_default(tb, flp, res);
+}
-static void fib_flush(void)
+static void fib_flush(struct net *net)
{
int flushed = 0;
-#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_table *tb;
- int id;
-
- for (id = RT_TABLE_MAX; id>0; id--) {
- if ((tb = fib_get_table(id))==NULL)
- continue;
- flushed += tb->tb_flush(tb);
+ struct hlist_node *node;
+ struct hlist_head *head;
+ unsigned int h;
+
+ for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
+ head = &net->ipv4.fib_table_hash[h];
+ hlist_for_each_entry(tb, node, head, tb_hlist)
+ flushed += fib_table_flush(tb);
}
-#else /* CONFIG_IP_MULTIPLE_TABLES */
- flushed += ip_fib_main_table->tb_flush(ip_fib_main_table);
- flushed += ip_fib_local_table->tb_flush(ip_fib_local_table);
-#endif /* CONFIG_IP_MULTIPLE_TABLES */
if (flushed)
- rt_cache_flush(-1);
+ rt_cache_flush(net, -1);
}
/*
* Find the first device with a given source address.
*/
-struct net_device * ip_dev_find(u32 addr)
+struct net_device * ip_dev_find(struct net *net, __be32 addr)
{
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } };
struct fib_result res;
struct net_device *dev = NULL;
+ struct fib_table *local_table;
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
- if (!ip_fib_local_table ||
- ip_fib_local_table->tb_lookup(ip_fib_local_table, &fl, &res))
+ local_table = fib_get_table(net, RT_TABLE_LOCAL);
+ if (!local_table || fib_table_lookup(local_table, &fl, &res))
return NULL;
if (res.type != RTN_LOCAL)
goto out;
return dev;
}
-unsigned inet_addr_type(u32 addr)
+/*
+ * Find address type as if only "dev" was present in the system. If
+ * on_dev is NULL then all interfaces are taken into consideration.
+ */
+static inline unsigned __inet_dev_addr_type(struct net *net,
+ const struct net_device *dev,
+ __be32 addr)
{
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } };
struct fib_result res;
unsigned ret = RTN_BROADCAST;
+ struct fib_table *local_table;
- if (ZERONET(addr) || BADCLASS(addr))
+ if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr))
return RTN_BROADCAST;
- if (MULTICAST(addr))
+ if (ipv4_is_multicast(addr))
return RTN_MULTICAST;
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
-
- if (ip_fib_local_table) {
+
+ local_table = fib_get_table(net, RT_TABLE_LOCAL);
+ if (local_table) {
ret = RTN_UNICAST;
- if (!ip_fib_local_table->tb_lookup(ip_fib_local_table,
- &fl, &res)) {
- ret = res.type;
+ if (!fib_table_lookup(local_table, &fl, &res)) {
+ if (!dev || dev == res.fi->fib_dev)
+ ret = res.type;
fib_res_put(&res);
}
}
return ret;
}
+unsigned int inet_addr_type(struct net *net, __be32 addr)
+{
+ return __inet_dev_addr_type(net, NULL, addr);
+}
+
+unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev,
+ __be32 addr)
+{
+ return __inet_dev_addr_type(net, dev, addr);
+}
+
/* Given (packet source, input interface) and optional (dst, oif, tos):
- (main) check, that source is valid i.e. not broadcast or our local
address.
- check, that packet arrived from expected physical interface.
*/
-int fib_validate_source(u32 src, u32 dst, u8 tos, int oif,
- struct net_device *dev, u32 *spec_dst, u32 *itag)
+int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif,
+ struct net_device *dev, __be32 *spec_dst,
+ u32 *itag, u32 mark)
{
struct in_device *in_dev;
struct flowi fl = { .nl_u = { .ip4_u =
{ .daddr = src,
.saddr = dst,
.tos = tos } },
+ .mark = mark,
.iif = oif };
+
struct fib_result res;
- int no_addr, rpf;
+ int no_addr, rpf, accept_local;
int ret;
+ struct net *net;
- no_addr = rpf = 0;
+ no_addr = rpf = accept_local = 0;
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
if (in_dev) {
no_addr = in_dev->ifa_list == NULL;
rpf = IN_DEV_RPFILTER(in_dev);
+ accept_local = IN_DEV_ACCEPT_LOCAL(in_dev);
+ if (mark && !IN_DEV_SRC_VMARK(in_dev))
+ fl.mark = 0;
}
rcu_read_unlock();
if (in_dev == NULL)
goto e_inval;
- if (fib_lookup(&fl, &res))
+ net = dev_net(dev);
+ if (fib_lookup(net, &fl, &res))
goto last_resort;
- if (res.type != RTN_UNICAST)
- goto e_inval_res;
+ if (res.type != RTN_UNICAST) {
+ if (res.type != RTN_LOCAL || !accept_local)
+ goto e_inval_res;
+ }
*spec_dst = FIB_RES_PREFSRC(res);
fib_combine_itag(itag, &res);
#ifdef CONFIG_IP_ROUTE_MULTIPATH
fib_res_put(&res);
if (no_addr)
goto last_resort;
- if (rpf)
+ if (rpf == 1)
goto e_inval;
fl.oif = dev->ifindex;
ret = 0;
- if (fib_lookup(&fl, &res) == 0) {
+ if (fib_lookup(net, &fl, &res) == 0) {
if (res.type == RTN_UNICAST) {
*spec_dst = FIB_RES_PREFSRC(res);
ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
return -EINVAL;
}
-#ifndef CONFIG_IP_NOSIOCRT
+static inline __be32 sk_extract_addr(struct sockaddr *addr)
+{
+ return ((struct sockaddr_in *) addr)->sin_addr.s_addr;
+}
+
+static int put_rtax(struct nlattr *mx, int len, int type, u32 value)
+{
+ struct nlattr *nla;
+
+ nla = (struct nlattr *) ((char *) mx + len);
+ nla->nla_type = type;
+ nla->nla_len = nla_attr_size(4);
+ *(u32 *) nla_data(nla) = value;
+
+ return len + nla_total_size(4);
+}
+
+static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
+ struct fib_config *cfg)
+{
+ __be32 addr;
+ int plen;
+
+ memset(cfg, 0, sizeof(*cfg));
+ cfg->fc_nlinfo.nl_net = net;
+
+ if (rt->rt_dst.sa_family != AF_INET)
+ return -EAFNOSUPPORT;
+
+ /*
+ * Check mask for validity:
+ * a) it must be contiguous.
+ * b) destination must have all host bits clear.
+ * c) if application forgot to set correct family (AF_INET),
+ * reject request unless it is absolutely clear i.e.
+ * both family and mask are zero.
+ */
+ plen = 32;
+ addr = sk_extract_addr(&rt->rt_dst);
+ if (!(rt->rt_flags & RTF_HOST)) {
+ __be32 mask = sk_extract_addr(&rt->rt_genmask);
+
+ if (rt->rt_genmask.sa_family != AF_INET) {
+ if (mask || rt->rt_genmask.sa_family)
+ return -EAFNOSUPPORT;
+ }
+
+ if (bad_mask(mask, addr))
+ return -EINVAL;
+
+ plen = inet_mask_len(mask);
+ }
+
+ cfg->fc_dst_len = plen;
+ cfg->fc_dst = addr;
+
+ if (cmd != SIOCDELRT) {
+ cfg->fc_nlflags = NLM_F_CREATE;
+ cfg->fc_protocol = RTPROT_BOOT;
+ }
+
+ if (rt->rt_metric)
+ cfg->fc_priority = rt->rt_metric - 1;
+
+ if (rt->rt_flags & RTF_REJECT) {
+ cfg->fc_scope = RT_SCOPE_HOST;
+ cfg->fc_type = RTN_UNREACHABLE;
+ return 0;
+ }
+
+ cfg->fc_scope = RT_SCOPE_NOWHERE;
+ cfg->fc_type = RTN_UNICAST;
+
+ if (rt->rt_dev) {
+ char *colon;
+ struct net_device *dev;
+ char devname[IFNAMSIZ];
+
+ if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1))
+ return -EFAULT;
+
+ devname[IFNAMSIZ-1] = 0;
+ colon = strchr(devname, ':');
+ if (colon)
+ *colon = 0;
+ dev = __dev_get_by_name(net, devname);
+ if (!dev)
+ return -ENODEV;
+ cfg->fc_oif = dev->ifindex;
+ if (colon) {
+ struct in_ifaddr *ifa;
+ struct in_device *in_dev = __in_dev_get_rtnl(dev);
+ if (!in_dev)
+ return -ENODEV;
+ *colon = ':';
+ for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next)
+ if (strcmp(ifa->ifa_label, devname) == 0)
+ break;
+ if (ifa == NULL)
+ return -ENODEV;
+ cfg->fc_prefsrc = ifa->ifa_local;
+ }
+ }
+
+ addr = sk_extract_addr(&rt->rt_gateway);
+ if (rt->rt_gateway.sa_family == AF_INET && addr) {
+ cfg->fc_gw = addr;
+ if (rt->rt_flags & RTF_GATEWAY &&
+ inet_addr_type(net, addr) == RTN_UNICAST)
+ cfg->fc_scope = RT_SCOPE_UNIVERSE;
+ }
+
+ if (cmd == SIOCDELRT)
+ return 0;
+
+ if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw)
+ return -EINVAL;
+
+ if (cfg->fc_scope == RT_SCOPE_NOWHERE)
+ cfg->fc_scope = RT_SCOPE_LINK;
+
+ if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) {
+ struct nlattr *mx;
+ int len = 0;
+
+ mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL);
+ if (mx == NULL)
+ return -ENOMEM;
+
+ if (rt->rt_flags & RTF_MTU)
+ len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40);
+
+ if (rt->rt_flags & RTF_WINDOW)
+ len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window);
+
+ if (rt->rt_flags & RTF_IRTT)
+ len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3);
+
+ cfg->fc_mx = mx;
+ cfg->fc_mx_len = len;
+ }
+
+ return 0;
+}
/*
* Handle IP routing ioctl calls. These are used to manipulate the routing tables
*/
-
-int ip_rt_ioctl(unsigned int cmd, void __user *arg)
+
+int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
{
+ struct fib_config cfg;
+ struct rtentry rt;
int err;
- struct kern_rta rta;
- struct rtentry r;
- struct {
- struct nlmsghdr nlh;
- struct rtmsg rtm;
- } req;
switch (cmd) {
case SIOCADDRT: /* Add a route */
case SIOCDELRT: /* Delete a route */
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- if (copy_from_user(&r, arg, sizeof(struct rtentry)))
+
+ if (copy_from_user(&rt, arg, sizeof(rt)))
return -EFAULT;
+
rtnl_lock();
- err = fib_convert_rtentry(cmd, &req.nlh, &req.rtm, &rta, &r);
+ err = rtentry_to_fib_config(net, cmd, &rt, &cfg);
if (err == 0) {
+ struct fib_table *tb;
+
if (cmd == SIOCDELRT) {
- struct fib_table *tb = fib_get_table(req.rtm.rtm_table);
- err = -ESRCH;
+ tb = fib_get_table(net, cfg.fc_table);
if (tb)
- err = tb->tb_delete(tb, &req.rtm, &rta, &req.nlh, NULL);
+ err = fib_table_delete(tb, &cfg);
+ else
+ err = -ESRCH;
} else {
- struct fib_table *tb = fib_new_table(req.rtm.rtm_table);
- err = -ENOBUFS;
+ tb = fib_new_table(net, cfg.fc_table);
if (tb)
- err = tb->tb_insert(tb, &req.rtm, &rta, &req.nlh, NULL);
+ err = fib_table_insert(tb, &cfg);
+ else
+ err = -ENOBUFS;
}
- kfree(rta.rta_mx);
+
+ /* allocated by rtentry_to_fib_config() */
+ kfree(cfg.fc_mx);
}
rtnl_unlock();
return err;
return -EINVAL;
}
-#else
-
-int ip_rt_ioctl(unsigned int cmd, void *arg)
-{
- return -EINVAL;
-}
-
-#endif
+const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = {
+ [RTA_DST] = { .type = NLA_U32 },
+ [RTA_SRC] = { .type = NLA_U32 },
+ [RTA_IIF] = { .type = NLA_U32 },
+ [RTA_OIF] = { .type = NLA_U32 },
+ [RTA_GATEWAY] = { .type = NLA_U32 },
+ [RTA_PRIORITY] = { .type = NLA_U32 },
+ [RTA_PREFSRC] = { .type = NLA_U32 },
+ [RTA_METRICS] = { .type = NLA_NESTED },
+ [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) },
+ [RTA_FLOW] = { .type = NLA_U32 },
+};
-static int inet_check_attr(struct rtmsg *r, struct rtattr **rta)
+static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct fib_config *cfg)
{
- int i;
+ struct nlattr *attr;
+ int err, remaining;
+ struct rtmsg *rtm;
+
+ err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy);
+ if (err < 0)
+ goto errout;
+
+ memset(cfg, 0, sizeof(*cfg));
+
+ rtm = nlmsg_data(nlh);
+ cfg->fc_dst_len = rtm->rtm_dst_len;
+ cfg->fc_tos = rtm->rtm_tos;
+ cfg->fc_table = rtm->rtm_table;
+ cfg->fc_protocol = rtm->rtm_protocol;
+ cfg->fc_scope = rtm->rtm_scope;
+ cfg->fc_type = rtm->rtm_type;
+ cfg->fc_flags = rtm->rtm_flags;
+ cfg->fc_nlflags = nlh->nlmsg_flags;
+
+ cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
+ cfg->fc_nlinfo.nlh = nlh;
+ cfg->fc_nlinfo.nl_net = net;
+
+ if (cfg->fc_type > RTN_MAX) {
+ err = -EINVAL;
+ goto errout;
+ }
- for (i=1; i<=RTA_MAX; i++) {
- struct rtattr *attr = rta[i-1];
- if (attr) {
- if (RTA_PAYLOAD(attr) < 4)
- return -EINVAL;
- if (i != RTA_MULTIPATH && i != RTA_METRICS)
- rta[i-1] = (struct rtattr*)RTA_DATA(attr);
+ nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) {
+ switch (nla_type(attr)) {
+ case RTA_DST:
+ cfg->fc_dst = nla_get_be32(attr);
+ break;
+ case RTA_OIF:
+ cfg->fc_oif = nla_get_u32(attr);
+ break;
+ case RTA_GATEWAY:
+ cfg->fc_gw = nla_get_be32(attr);
+ break;
+ case RTA_PRIORITY:
+ cfg->fc_priority = nla_get_u32(attr);
+ break;
+ case RTA_PREFSRC:
+ cfg->fc_prefsrc = nla_get_be32(attr);
+ break;
+ case RTA_METRICS:
+ cfg->fc_mx = nla_data(attr);
+ cfg->fc_mx_len = nla_len(attr);
+ break;
+ case RTA_MULTIPATH:
+ cfg->fc_mp = nla_data(attr);
+ cfg->fc_mp_len = nla_len(attr);
+ break;
+ case RTA_FLOW:
+ cfg->fc_flow = nla_get_u32(attr);
+ break;
+ case RTA_TABLE:
+ cfg->fc_table = nla_get_u32(attr);
+ break;
}
}
+
return 0;
+errout:
+ return err;
}
-int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
- struct fib_table * tb;
- struct rtattr **rta = arg;
- struct rtmsg *r = NLMSG_DATA(nlh);
+ struct net *net = sock_net(skb->sk);
+ struct fib_config cfg;
+ struct fib_table *tb;
+ int err;
- if (inet_check_attr(r, rta))
- return -EINVAL;
+ err = rtm_to_fib_config(net, skb, nlh, &cfg);
+ if (err < 0)
+ goto errout;
- tb = fib_get_table(r->rtm_table);
- if (tb)
- return tb->tb_delete(tb, r, (struct kern_rta*)rta, nlh, &NETLINK_CB(skb));
- return -ESRCH;
+ tb = fib_get_table(net, cfg.fc_table);
+ if (tb == NULL) {
+ err = -ESRCH;
+ goto errout;
+ }
+
+ err = fib_table_delete(tb, &cfg);
+errout:
+ return err;
}
-int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
- struct fib_table * tb;
- struct rtattr **rta = arg;
- struct rtmsg *r = NLMSG_DATA(nlh);
+ struct net *net = sock_net(skb->sk);
+ struct fib_config cfg;
+ struct fib_table *tb;
+ int err;
- if (inet_check_attr(r, rta))
- return -EINVAL;
+ err = rtm_to_fib_config(net, skb, nlh, &cfg);
+ if (err < 0)
+ goto errout;
- tb = fib_new_table(r->rtm_table);
- if (tb)
- return tb->tb_insert(tb, r, (struct kern_rta*)rta, nlh, &NETLINK_CB(skb));
- return -ENOBUFS;
+ tb = fib_new_table(net, cfg.fc_table);
+ if (tb == NULL) {
+ err = -ENOBUFS;
+ goto errout;
+ }
+
+ err = fib_table_insert(tb, &cfg);
+errout:
+ return err;
}
-int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
+static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
{
- int t;
- int s_t;
+ struct net *net = sock_net(skb->sk);
+ unsigned int h, s_h;
+ unsigned int e = 0, s_e;
struct fib_table *tb;
+ struct hlist_node *node;
+ struct hlist_head *head;
+ int dumped = 0;
- if (NLMSG_PAYLOAD(cb->nlh, 0) >= sizeof(struct rtmsg) &&
- ((struct rtmsg*)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED)
+ if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
+ ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED)
return ip_rt_dump(skb, cb);
- s_t = cb->args[0];
- if (s_t == 0)
- s_t = cb->args[0] = RT_TABLE_MIN;
-
- for (t=s_t; t<=RT_TABLE_MAX; t++) {
- if (t < s_t) continue;
- if (t > s_t)
- memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0]));
- if ((tb = fib_get_table(t))==NULL)
- continue;
- if (tb->tb_dump(tb, skb, cb) < 0)
- break;
+ s_h = cb->args[0];
+ s_e = cb->args[1];
+
+ for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) {
+ e = 0;
+ head = &net->ipv4.fib_table_hash[h];
+ hlist_for_each_entry(tb, node, head, tb_hlist) {
+ if (e < s_e)
+ goto next;
+ if (dumped)
+ memset(&cb->args[2], 0, sizeof(cb->args) -
+ 2 * sizeof(cb->args[0]));
+ if (fib_table_dump(tb, skb, cb) < 0)
+ goto out;
+ dumped = 1;
+next:
+ e++;
+ }
}
-
- cb->args[0] = t;
+out:
+ cb->args[1] = e;
+ cb->args[0] = h;
return skb->len;
}
only when netlink is already locked.
*/
-static void fib_magic(int cmd, int type, u32 dst, int dst_len, struct in_ifaddr *ifa)
+static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa)
{
- struct fib_table * tb;
- struct {
- struct nlmsghdr nlh;
- struct rtmsg rtm;
- } req;
- struct kern_rta rta;
-
- memset(&req.rtm, 0, sizeof(req.rtm));
- memset(&rta, 0, sizeof(rta));
+ struct net *net = dev_net(ifa->ifa_dev->dev);
+ struct fib_table *tb;
+ struct fib_config cfg = {
+ .fc_protocol = RTPROT_KERNEL,
+ .fc_type = type,
+ .fc_dst = dst,
+ .fc_dst_len = dst_len,
+ .fc_prefsrc = ifa->ifa_local,
+ .fc_oif = ifa->ifa_dev->dev->ifindex,
+ .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND,
+ .fc_nlinfo = {
+ .nl_net = net,
+ },
+ };
if (type == RTN_UNICAST)
- tb = fib_new_table(RT_TABLE_MAIN);
+ tb = fib_new_table(net, RT_TABLE_MAIN);
else
- tb = fib_new_table(RT_TABLE_LOCAL);
+ tb = fib_new_table(net, RT_TABLE_LOCAL);
if (tb == NULL)
return;
- req.nlh.nlmsg_len = sizeof(req);
- req.nlh.nlmsg_type = cmd;
- req.nlh.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_APPEND;
- req.nlh.nlmsg_pid = 0;
- req.nlh.nlmsg_seq = 0;
+ cfg.fc_table = tb->tb_id;
- req.rtm.rtm_dst_len = dst_len;
- req.rtm.rtm_table = tb->tb_id;
- req.rtm.rtm_protocol = RTPROT_KERNEL;
- req.rtm.rtm_scope = (type != RTN_LOCAL ? RT_SCOPE_LINK : RT_SCOPE_HOST);
- req.rtm.rtm_type = type;
-
- rta.rta_dst = &dst;
- rta.rta_prefsrc = &ifa->ifa_local;
- rta.rta_oif = &ifa->ifa_dev->dev->ifindex;
+ if (type != RTN_LOCAL)
+ cfg.fc_scope = RT_SCOPE_LINK;
+ else
+ cfg.fc_scope = RT_SCOPE_HOST;
if (cmd == RTM_NEWROUTE)
- tb->tb_insert(tb, &req.rtm, &rta, &req.nlh, NULL);
+ fib_table_insert(tb, &cfg);
else
- tb->tb_delete(tb, &req.rtm, &rta, &req.nlh, NULL);
+ fib_table_delete(tb, &cfg);
}
-static void fib_add_ifaddr(struct in_ifaddr *ifa)
+void fib_add_ifaddr(struct in_ifaddr *ifa)
{
struct in_device *in_dev = ifa->ifa_dev;
struct net_device *dev = in_dev->dev;
struct in_ifaddr *prim = ifa;
- u32 mask = ifa->ifa_mask;
- u32 addr = ifa->ifa_local;
- u32 prefix = ifa->ifa_address&mask;
+ __be32 mask = ifa->ifa_mask;
+ __be32 addr = ifa->ifa_local;
+ __be32 prefix = ifa->ifa_address&mask;
if (ifa->ifa_flags&IFA_F_SECONDARY) {
prim = inet_ifa_byprefix(in_dev, prefix, mask);
if (prim == NULL) {
- printk(KERN_DEBUG "fib_add_ifaddr: bug: prim == NULL\n");
+ printk(KERN_WARNING "fib_add_ifaddr: bug: prim == NULL\n");
return;
}
}
return;
/* Add broadcast address, if it is explicitly assigned. */
- if (ifa->ifa_broadcast && ifa->ifa_broadcast != 0xFFFFFFFF)
+ if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF))
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
- if (!ZERONET(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) &&
+ if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) &&
(prefix != addr || ifa->ifa_prefixlen < 32)) {
fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL :
RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim);
struct net_device *dev = in_dev->dev;
struct in_ifaddr *ifa1;
struct in_ifaddr *prim = ifa;
- u32 brd = ifa->ifa_address|~ifa->ifa_mask;
- u32 any = ifa->ifa_address&ifa->ifa_mask;
+ __be32 brd = ifa->ifa_address|~ifa->ifa_mask;
+ __be32 any = ifa->ifa_address&ifa->ifa_mask;
#define LOCAL_OK 1
#define BRD_OK 2
#define BRD0_OK 4
else {
prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask);
if (prim == NULL) {
- printk(KERN_DEBUG "fib_del_ifaddr: bug: prim == NULL\n");
+ printk(KERN_WARNING "fib_del_ifaddr: bug: prim == NULL\n");
return;
}
}
fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim);
/* Check, that this local address finally disappeared. */
- if (inet_addr_type(ifa->ifa_local) != RTN_LOCAL) {
+ if (inet_addr_type(dev_net(dev), ifa->ifa_local) != RTN_LOCAL) {
/* And the last, but not the least thing.
We must flush stray FIB entries.
First of all, we scan fib_info list searching
for stray nexthop entries, then ignite fib_flush.
*/
- if (fib_sync_down(ifa->ifa_local, NULL, 0))
- fib_flush();
+ if (fib_sync_down_addr(dev_net(dev), ifa->ifa_local))
+ fib_flush(dev_net(dev));
}
}
#undef LOCAL_OK
static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
{
-
+
struct fib_result res;
- struct flowi fl = { .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
- .fwmark = frn->fl_fwmark,
+ struct flowi fl = { .mark = frn->fl_mark,
+ .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
.tos = frn->fl_tos,
.scope = frn->fl_scope } } };
+
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+ res.r = NULL;
+#endif
+
+ frn->err = -ENOENT;
if (tb) {
local_bh_disable();
frn->tb_id = tb->tb_id;
- frn->err = tb->tb_lookup(tb, &fl, &res);
+ frn->err = fib_table_lookup(tb, &fl, &res);
if (!frn->err) {
frn->prefixlen = res.prefixlen;
frn->nh_sel = res.nh_sel;
frn->type = res.type;
frn->scope = res.scope;
+ fib_res_put(&res);
}
local_bh_enable();
}
}
-static void nl_fib_input(struct sock *sk, int len)
+static void nl_fib_input(struct sk_buff *skb)
{
- struct sk_buff *skb = NULL;
- struct nlmsghdr *nlh = NULL;
+ struct net *net;
struct fib_result_nl *frn;
- int err;
- u32 pid;
+ struct nlmsghdr *nlh;
struct fib_table *tb;
-
- skb = skb_recv_datagram(sk, 0, 0, &err);
- nlh = (struct nlmsghdr *)skb->data;
-
+ u32 pid;
+
+ net = sock_net(skb->sk);
+ nlh = nlmsg_hdr(skb);
+ if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len ||
+ nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn)))
+ return;
+
+ skb = skb_clone(skb, GFP_KERNEL);
+ if (skb == NULL)
+ return;
+ nlh = nlmsg_hdr(skb);
+
frn = (struct fib_result_nl *) NLMSG_DATA(nlh);
- tb = fib_get_table(frn->tb_id_in);
+ tb = fib_get_table(net, frn->tb_id_in);
nl_fib_lookup(frn, tb);
-
- pid = nlh->nlmsg_pid; /*pid of sending process */
+
+ pid = NETLINK_CB(skb).pid; /* pid of sending process */
NETLINK_CB(skb).pid = 0; /* from kernel */
- NETLINK_CB(skb).dst_pid = pid;
NETLINK_CB(skb).dst_group = 0; /* unicast */
- netlink_unicast(sk, skb, pid, MSG_DONTWAIT);
-}
+ netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT);
+}
+
+static int __net_init nl_fib_lookup_init(struct net *net)
+{
+ struct sock *sk;
+ sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0,
+ nl_fib_input, NULL, THIS_MODULE);
+ if (sk == NULL)
+ return -EAFNOSUPPORT;
+ net->ipv4.fibnl = sk;
+ return 0;
+}
-static void nl_fib_lookup_init(void)
+static void nl_fib_lookup_exit(struct net *net)
{
- netlink_kernel_create(NETLINK_FIB_LOOKUP, 0, nl_fib_input, THIS_MODULE);
+ netlink_kernel_release(net->ipv4.fibnl);
+ net->ipv4.fibnl = NULL;
}
-static void fib_disable_ip(struct net_device *dev, int force)
+static void fib_disable_ip(struct net_device *dev, int force, int delay)
{
- if (fib_sync_down(0, dev, force))
- fib_flush();
- rt_cache_flush(0);
+ if (fib_sync_down_dev(dev, force))
+ fib_flush(dev_net(dev));
+ rt_cache_flush(dev_net(dev), delay);
arp_ifdown(dev);
}
static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
{
- struct in_ifaddr *ifa = (struct in_ifaddr*)ptr;
+ struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
+ struct net_device *dev = ifa->ifa_dev->dev;
switch (event) {
case NETDEV_UP:
fib_add_ifaddr(ifa);
#ifdef CONFIG_IP_ROUTE_MULTIPATH
- fib_sync_up(ifa->ifa_dev->dev);
+ fib_sync_up(dev);
#endif
- rt_cache_flush(-1);
+ rt_cache_flush(dev_net(dev), -1);
break;
case NETDEV_DOWN:
fib_del_ifaddr(ifa);
/* Last address was deleted from this interface.
Disable IP.
*/
- fib_disable_ip(ifa->ifa_dev->dev, 1);
+ fib_disable_ip(dev, 1, 0);
} else {
- rt_cache_flush(-1);
+ rt_cache_flush(dev_net(dev), -1);
}
break;
}
struct in_device *in_dev = __in_dev_get_rtnl(dev);
if (event == NETDEV_UNREGISTER) {
- fib_disable_ip(dev, 2);
+ fib_disable_ip(dev, 2, -1);
return NOTIFY_DONE;
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
fib_sync_up(dev);
#endif
- rt_cache_flush(-1);
+ rt_cache_flush(dev_net(dev), -1);
break;
case NETDEV_DOWN:
- fib_disable_ip(dev, 0);
+ fib_disable_ip(dev, 0, 0);
break;
case NETDEV_CHANGEMTU:
case NETDEV_CHANGE:
- rt_cache_flush(0);
+ rt_cache_flush(dev_net(dev), 0);
+ break;
+ case NETDEV_UNREGISTER_BATCH:
+ rt_cache_flush_batch();
break;
}
return NOTIFY_DONE;
}
static struct notifier_block fib_inetaddr_notifier = {
- .notifier_call =fib_inetaddr_event,
+ .notifier_call = fib_inetaddr_event,
};
static struct notifier_block fib_netdev_notifier = {
- .notifier_call =fib_netdev_event,
+ .notifier_call = fib_netdev_event,
};
-void __init ip_fib_init(void)
+static int __net_init ip_fib_net_init(struct net *net)
{
-#ifndef CONFIG_IP_MULTIPLE_TABLES
- ip_fib_local_table = fib_hash_init(RT_TABLE_LOCAL);
- ip_fib_main_table = fib_hash_init(RT_TABLE_MAIN);
-#else
- fib_rules_init();
+ int err;
+ unsigned int i;
+
+ net->ipv4.fib_table_hash = kzalloc(
+ sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL);
+ if (net->ipv4.fib_table_hash == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < FIB_TABLE_HASHSZ; i++)
+ INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]);
+
+ err = fib4_rules_init(net);
+ if (err < 0)
+ goto fail;
+ return 0;
+
+fail:
+ kfree(net->ipv4.fib_table_hash);
+ return err;
+}
+
+static void ip_fib_net_exit(struct net *net)
+{
+ unsigned int i;
+
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+ fib4_rules_exit(net);
#endif
+ for (i = 0; i < FIB_TABLE_HASHSZ; i++) {
+ struct fib_table *tb;
+ struct hlist_head *head;
+ struct hlist_node *node, *tmp;
+
+ head = &net->ipv4.fib_table_hash[i];
+ hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) {
+ hlist_del(node);
+ fib_table_flush(tb);
+ kfree(tb);
+ }
+ }
+ kfree(net->ipv4.fib_table_hash);
+}
+
+static int __net_init fib_net_init(struct net *net)
+{
+ int error;
+
+ error = ip_fib_net_init(net);
+ if (error < 0)
+ goto out;
+ error = nl_fib_lookup_init(net);
+ if (error < 0)
+ goto out_nlfl;
+ error = fib_proc_init(net);
+ if (error < 0)
+ goto out_proc;
+out:
+ return error;
+
+out_proc:
+ nl_fib_lookup_exit(net);
+out_nlfl:
+ ip_fib_net_exit(net);
+ goto out;
+}
+
+static void __net_exit fib_net_exit(struct net *net)
+{
+ fib_proc_exit(net);
+ nl_fib_lookup_exit(net);
+ ip_fib_net_exit(net);
+}
+
+static struct pernet_operations fib_net_ops = {
+ .init = fib_net_init,
+ .exit = fib_net_exit,
+};
+
+void __init ip_fib_init(void)
+{
+ rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL);
+ rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL);
+ rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib);
+
+ register_pernet_subsys(&fib_net_ops);
register_netdevice_notifier(&fib_netdev_notifier);
register_inetaddr_notifier(&fib_inetaddr_notifier);
- nl_fib_lookup_init();
+
+ fib_hash_init();
}
EXPORT_SYMBOL(inet_addr_type);
-EXPORT_SYMBOL(ip_rt_ioctl);
+EXPORT_SYMBOL(inet_dev_addr_type);
+EXPORT_SYMBOL(ip_dev_find);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff