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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c1059
1 files changed, 610 insertions, 449 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index d9baca062d2..d6b4b4f48d1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -22,6 +22,8 @@
* routers in REACHABLE, STALE, DELAY or PROBE states).
* - always select the same router if it is (probably)
* reachable. otherwise, round-robin the list.
+ * Ville Nuorvala
+ * Fixed routing subtrees.
*/
#include <linux/capability.h>
@@ -35,7 +37,6 @@
#include <linux/netdevice.h>
#include <linux/in6.h>
#include <linux/init.h>
-#include <linux/netlink.h>
#include <linux/if_arp.h>
#ifdef CONFIG_PROC_FS
@@ -54,6 +55,7 @@
#include <net/dst.h>
#include <net/xfrm.h>
#include <net/netevent.h>
+#include <net/netlink.h>
#include <asm/uaccess.h>
@@ -74,9 +76,6 @@
#define CLONE_OFFLINK_ROUTE 0
-#define RT6_SELECT_F_IFACE 0x1
-#define RT6_SELECT_F_REACHABLE 0x2
-
static int ip6_rt_max_size = 4096;
static int ip6_rt_gc_min_interval = HZ / 2;
static int ip6_rt_gc_timeout = 60*HZ;
@@ -140,15 +139,49 @@ struct rt6_info ip6_null_entry = {
.rt6i_ref = ATOMIC_INIT(1),
};
-struct fib6_node ip6_routing_table = {
- .leaf = &ip6_null_entry,
- .fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO,
-};
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-/* Protects all the ip6 fib */
+struct rt6_info ip6_prohibit_entry = {
+ .u = {
+ .dst = {
+ .__refcnt = ATOMIC_INIT(1),
+ .__use = 1,
+ .dev = &loopback_dev,
+ .obsolete = -1,
+ .error = -EACCES,
+ .metrics = { [RTAX_HOPLIMIT - 1] = 255, },
+ .input = ip6_pkt_discard,
+ .output = ip6_pkt_discard_out,
+ .ops = &ip6_dst_ops,
+ .path = (struct dst_entry*)&ip6_prohibit_entry,
+ }
+ },
+ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
+ .rt6i_metric = ~(u32) 0,
+ .rt6i_ref = ATOMIC_INIT(1),
+};
-DEFINE_RWLOCK(rt6_lock);
+struct rt6_info ip6_blk_hole_entry = {
+ .u = {
+ .dst = {
+ .__refcnt = ATOMIC_INIT(1),
+ .__use = 1,
+ .dev = &loopback_dev,
+ .obsolete = -1,
+ .error = -EINVAL,
+ .metrics = { [RTAX_HOPLIMIT - 1] = 255, },
+ .input = ip6_pkt_discard,
+ .output = ip6_pkt_discard_out,
+ .ops = &ip6_dst_ops,
+ .path = (struct dst_entry*)&ip6_blk_hole_entry,
+ }
+ },
+ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
+ .rt6i_metric = ~(u32) 0,
+ .rt6i_ref = ATOMIC_INIT(1),
+};
+#endif
/* allocate dst with ip6_dst_ops */
static __inline__ struct rt6_info *ip6_dst_alloc(void)
@@ -188,8 +221,14 @@ static __inline__ int rt6_check_expired(const struct rt6_info *rt)
time_after(jiffies, rt->rt6i_expires));
}
+static inline int rt6_need_strict(struct in6_addr *daddr)
+{
+ return (ipv6_addr_type(daddr) &
+ (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL));
+}
+
/*
- * Route lookup. Any rt6_lock is implied.
+ * Route lookup. Any table->tb6_lock is implied.
*/
static __inline__ struct rt6_info *rt6_device_match(struct rt6_info *rt,
@@ -298,7 +337,7 @@ static int rt6_score_route(struct rt6_info *rt, int oif,
int m, n;
m = rt6_check_dev(rt, oif);
- if (!m && (strict & RT6_SELECT_F_IFACE))
+ if (!m && (strict & RT6_LOOKUP_F_IFACE))
return -1;
#ifdef CONFIG_IPV6_ROUTER_PREF
m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2;
@@ -306,7 +345,7 @@ static int rt6_score_route(struct rt6_info *rt, int oif,
n = rt6_check_neigh(rt);
if (n > 1)
m |= 16;
- else if (!n && strict & RT6_SELECT_F_REACHABLE)
+ else if (!n && strict & RT6_LOOKUP_F_REACHABLE)
return -1;
return m;
}
@@ -346,7 +385,7 @@ static struct rt6_info *rt6_select(struct rt6_info **head, int oif,
}
if (!match &&
- (strict & RT6_SELECT_F_REACHABLE) &&
+ (strict & RT6_LOOKUP_F_REACHABLE) &&
last && last != rt0) {
/* no entries matched; do round-robin */
static DEFINE_SPINLOCK(lock);
@@ -417,7 +456,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
rt = rt6_get_route_info(prefix, rinfo->prefix_len, gwaddr, dev->ifindex);
if (rt && !lifetime) {
- ip6_del_rt(rt, NULL, NULL, NULL);
+ ip6_del_rt(rt);
rt = NULL;
}
@@ -441,44 +480,95 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
}
#endif
-struct rt6_info *rt6_lookup(struct in6_addr *daddr, struct in6_addr *saddr,
- int oif, int strict)
+#define BACKTRACK(saddr) \
+do { \
+ if (rt == &ip6_null_entry) { \
+ struct fib6_node *pn; \
+ while (fn) { \
+ if (fn->fn_flags & RTN_TL_ROOT) \
+ goto out; \
+ pn = fn->parent; \
+ if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \
+ fn = fib6_lookup(pn->subtree, NULL, saddr); \
+ else \
+ fn = pn; \
+ if (fn->fn_flags & RTN_RTINFO) \
+ goto restart; \
+ } \
+ } \
+} while(0)
+
+static struct rt6_info *ip6_pol_route_lookup(struct fib6_table *table,
+ struct flowi *fl, int flags)
{
struct fib6_node *fn;
struct rt6_info *rt;
- read_lock_bh(&rt6_lock);
- fn = fib6_lookup(&ip6_routing_table, daddr, saddr);
- rt = rt6_device_match(fn->leaf, oif, strict);
+ read_lock_bh(&table->tb6_lock);
+ fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
+restart:
+ rt = fn->leaf;
+ rt = rt6_device_match(rt, fl->oif, flags);
+ BACKTRACK(&fl->fl6_src);
+out:
dst_hold(&rt->u.dst);
- rt->u.dst.__use++;
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
rt->u.dst.lastuse = jiffies;
- if (rt->u.dst.error == 0)
- return rt;
- dst_release(&rt->u.dst);
+ rt->u.dst.__use++;
+
+ return rt;
+
+}
+
+struct rt6_info *rt6_lookup(struct in6_addr *daddr, struct in6_addr *saddr,
+ int oif, int strict)
+{
+ struct flowi fl = {
+ .oif = oif,
+ .nl_u = {
+ .ip6_u = {
+ .daddr = *daddr,
+ /* TODO: saddr */
+ },
+ },
+ };
+ struct dst_entry *dst;
+ int flags = strict ? RT6_LOOKUP_F_IFACE : 0;
+
+ dst = fib6_rule_lookup(&fl, flags, ip6_pol_route_lookup);
+ if (dst->error == 0)
+ return (struct rt6_info *) dst;
+
+ dst_release(dst);
+
return NULL;
}
-/* ip6_ins_rt is called with FREE rt6_lock.
+/* ip6_ins_rt is called with FREE table->tb6_lock.
It takes new route entry, the addition fails by any reason the
route is freed. In any case, if caller does not hold it, it may
be destroyed.
*/
-int ip6_ins_rt(struct rt6_info *rt, struct nlmsghdr *nlh,
- void *_rtattr, struct netlink_skb_parms *req)
+static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info)
{
int err;
+ struct fib6_table *table;
- write_lock_bh(&rt6_lock);
- err = fib6_add(&ip6_routing_table, rt, nlh, _rtattr, req);
- write_unlock_bh(&rt6_lock);
+ table = rt->rt6i_table;
+ write_lock_bh(&table->tb6_lock);
+ err = fib6_add(&table->tb6_root, rt, info);
+ write_unlock_bh(&table->tb6_lock);
return err;
}
+int ip6_ins_rt(struct rt6_info *rt)
+{
+ return __ip6_ins_rt(rt, NULL);
+}
+
static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr,
struct in6_addr *saddr)
{
@@ -532,51 +622,39 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *d
return rt;
}
-#define BACKTRACK() \
-if (rt == &ip6_null_entry) { \
- while ((fn = fn->parent) != NULL) { \
- if (fn->fn_flags & RTN_ROOT) { \
- goto out; \
- } \
- if (fn->fn_flags & RTN_RTINFO) \
- goto restart; \
- } \
-}
-
-
-void ip6_route_input(struct sk_buff *skb)
+static struct rt6_info *ip6_pol_route_input(struct fib6_table *table,
+ struct flowi *fl, int flags)
{
struct fib6_node *fn;
struct rt6_info *rt, *nrt;
- int strict;
+ int strict = 0;
int attempts = 3;
int err;
- int reachable = RT6_SELECT_F_REACHABLE;
+ int reachable = RT6_LOOKUP_F_REACHABLE;
- strict = ipv6_addr_type(&skb->nh.ipv6h->daddr) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL) ? RT6_SELECT_F_IFACE : 0;
+ strict |= flags & RT6_LOOKUP_F_IFACE;
relookup:
- read_lock_bh(&rt6_lock);
+ read_lock_bh(&table->tb6_lock);
restart_2:
- fn = fib6_lookup(&ip6_routing_table, &skb->nh.ipv6h->daddr,
- &skb->nh.ipv6h->saddr);
+ fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
restart:
- rt = rt6_select(&fn->leaf, skb->dev->ifindex, strict | reachable);
- BACKTRACK();
+ rt = rt6_select(&fn->leaf, fl->iif, strict | reachable);
+ BACKTRACK(&fl->fl6_src);
if (rt == &ip6_null_entry ||
rt->rt6i_flags & RTF_CACHE)
goto out;
dst_hold(&rt->u.dst);
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
- nrt = rt6_alloc_cow(rt, &skb->nh.ipv6h->daddr, &skb->nh.ipv6h->saddr);
+ nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src);
else {
#if CLONE_OFFLINK_ROUTE
- nrt = rt6_alloc_clone(rt, &skb->nh.ipv6h->daddr);
+ nrt = rt6_alloc_clone(rt, &fl->fl6_dst);
#else
goto out2;
#endif
@@ -587,7 +665,7 @@ restart:
dst_hold(&rt->u.dst);
if (nrt) {
- err = ip6_ins_rt(nrt, NULL, NULL, &NETLINK_CB(skb));
+ err = ip6_ins_rt(nrt);
if (!err)
goto out2;
}
@@ -596,7 +674,7 @@ restart:
goto out2;
/*
- * Race condition! In the gap, when rt6_lock was
+ * Race condition! In the gap, when table->tb6_lock was
* released someone could insert this route. Relookup.
*/
dst_release(&rt->u.dst);
@@ -608,40 +686,63 @@ out:
goto restart_2;
}
dst_hold(&rt->u.dst);
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
out2:
rt->u.dst.lastuse = jiffies;
rt->u.dst.__use++;
- skb->dst = (struct dst_entry *) rt;
- return;
+
+ return rt;
}
-struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)
+void ip6_route_input(struct sk_buff *skb)
+{
+ struct ipv6hdr *iph = skb->nh.ipv6h;
+ struct flowi fl = {
+ .iif = skb->dev->ifindex,
+ .nl_u = {
+ .ip6_u = {
+ .daddr = iph->daddr,
+ .saddr = iph->saddr,
+#ifdef CONFIG_IPV6_ROUTE_FWMARK
+ .fwmark = skb->nfmark,
+#endif
+ .flowlabel = (* (u32 *) iph)&IPV6_FLOWINFO_MASK,
+ },
+ },
+ .proto = iph->nexthdr,
+ };
+ int flags = rt6_need_strict(&iph->daddr) ? RT6_LOOKUP_F_IFACE : 0;
+
+ skb->dst = fib6_rule_lookup(&fl, flags, ip6_pol_route_input);
+}
+
+static struct rt6_info *ip6_pol_route_output(struct fib6_table *table,
+ struct flowi *fl, int flags)
{
struct fib6_node *fn;
struct rt6_info *rt, *nrt;
- int strict;
+ int strict = 0;
int attempts = 3;
int err;
- int reachable = RT6_SELECT_F_REACHABLE;
+ int reachable = RT6_LOOKUP_F_REACHABLE;
- strict = ipv6_addr_type(&fl->fl6_dst) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL) ? RT6_SELECT_F_IFACE : 0;
+ strict |= flags & RT6_LOOKUP_F_IFACE;
relookup:
- read_lock_bh(&rt6_lock);
+ read_lock_bh(&table->tb6_lock);
restart_2:
- fn = fib6_lookup(&ip6_routing_table, &fl->fl6_dst, &fl->fl6_src);
+ fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
restart:
rt = rt6_select(&fn->leaf, fl->oif, strict | reachable);
- BACKTRACK();
+ BACKTRACK(&fl->fl6_src);
if (rt == &ip6_null_entry ||
rt->rt6i_flags & RTF_CACHE)
goto out;
dst_hold(&rt->u.dst);
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src);
@@ -658,7 +759,7 @@ restart:
dst_hold(&rt->u.dst);
if (nrt) {
- err = ip6_ins_rt(nrt, NULL, NULL, NULL);
+ err = ip6_ins_rt(nrt);
if (!err)
goto out2;
}
@@ -667,7 +768,7 @@ restart:
goto out2;
/*
- * Race condition! In the gap, when rt6_lock was
+ * Race condition! In the gap, when table->tb6_lock was
* released someone could insert this route. Relookup.
*/
dst_release(&rt->u.dst);
@@ -679,11 +780,21 @@ out:
goto restart_2;
}
dst_hold(&rt->u.dst);
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
out2:
rt->u.dst.lastuse = jiffies;
rt->u.dst.__use++;
- return &rt->u.dst;
+ return rt;
+}
+
+struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)
+{
+ int flags = 0;
+
+ if (rt6_need_strict(&fl->fl6_dst))
+ flags |= RT6_LOOKUP_F_IFACE;
+
+ return fib6_rule_lookup(fl, flags, ip6_pol_route_output);
}
@@ -709,7 +820,7 @@ static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
if (rt) {
if (rt->rt6i_flags & RTF_CACHE)
- ip6_del_rt(rt, NULL, NULL, NULL);
+ ip6_del_rt(rt);
else
dst_release(dst);
}
@@ -747,8 +858,6 @@ static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
}
}
-/* Protected by rt6_lock. */
-static struct dst_entry *ndisc_dst_gc_list;
static int ipv6_get_mtu(struct net_device *dev);
static inline unsigned int ipv6_advmss(unsigned int mtu)
@@ -769,6 +878,9 @@ static inline unsigned int ipv6_advmss(unsigned int mtu)
return mtu;
}
+static struct dst_entry *ndisc_dst_gc_list;
+static DEFINE_SPINLOCK(ndisc_lock);
+
struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
struct neighbour *neigh,
struct in6_addr *addr,
@@ -809,10 +921,10 @@ struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
rt->rt6i_dst.plen = 128;
#endif
- write_lock_bh(&rt6_lock);
+ spin_lock_bh(&ndisc_lock);
rt->u.dst.next = ndisc_dst_gc_list;
ndisc_dst_gc_list = &rt->u.dst;
- write_unlock_bh(&rt6_lock);
+ spin_unlock_bh(&ndisc_lock);
fib6_force_start_gc();
@@ -826,8 +938,11 @@ int ndisc_dst_gc(int *more)
int freed;
next = NULL;
+ freed = 0;
+
+ spin_lock_bh(&ndisc_lock);
pprev = &ndisc_dst_gc_list;
- freed = 0;
+
while ((dst = *pprev) != NULL) {
if (!atomic_read(&dst->__refcnt)) {
*pprev = dst->next;
@@ -839,6 +954,8 @@ int ndisc_dst_gc(int *more)
}
}
+ spin_unlock_bh(&ndisc_lock);
+
return freed;
}
@@ -899,28 +1016,24 @@ int ipv6_get_hoplimit(struct net_device *dev)
*
*/
-int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
- void *_rtattr, struct netlink_skb_parms *req)
+int ip6_route_add(struct fib6_config *cfg)
{
int err;
- struct rtmsg *r;
- struct rtattr **rta;
struct rt6_info *rt = NULL;
struct net_device *dev = NULL;
struct inet6_dev *idev = NULL;
+ struct fib6_table *table;
int addr_type;
- rta = (struct rtattr **) _rtattr;
-
- if (rtmsg->rtmsg_dst_len > 128 || rtmsg->rtmsg_src_len > 128)
+ if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128)
return -EINVAL;
#ifndef CONFIG_IPV6_SUBTREES
- if (rtmsg->rtmsg_src_len)
+ if (cfg->fc_src_len)
return -EINVAL;
#endif
- if (rtmsg->rtmsg_ifindex) {
+ if (cfg->fc_ifindex) {
err = -ENODEV;
- dev = dev_get_by_index(rtmsg->rtmsg_ifindex);
+ dev = dev_get_by_index(cfg->fc_ifindex);
if (!dev)
goto out;
idev = in6_dev_get(dev);
@@ -928,8 +1041,14 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
goto out;
}
- if (rtmsg->rtmsg_metric == 0)
- rtmsg->rtmsg_metric = IP6_RT_PRIO_USER;
+ if (cfg->fc_metric == 0)
+ cfg->fc_metric = IP6_RT_PRIO_USER;
+
+ table = fib6_new_table(cfg->fc_table);
+ if (table == NULL) {
+ err = -ENOBUFS;
+ goto out;
+ }
rt = ip6_dst_alloc();
@@ -939,14 +1058,13 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
}
rt->u.dst.obsolete = -1;
- rt->rt6i_expires = jiffies + clock_t_to_jiffies(rtmsg->rtmsg_info);
- if (nlh && (r = NLMSG_DATA(nlh))) {
- rt->rt6i_protocol = r->rtm_protocol;
- } else {
- rt->rt6i_protocol = RTPROT_BOOT;
- }
+ rt->rt6i_expires = jiffies + clock_t_to_jiffies(cfg->fc_expires);
- addr_type = ipv6_addr_type(&rtmsg->rtmsg_dst);
+ if (cfg->fc_protocol == RTPROT_UNSPEC)
+ cfg->fc_protocol = RTPROT_BOOT;
+ rt->rt6i_protocol = cfg->fc_protocol;
+
+ addr_type = ipv6_addr_type(&cfg->fc_dst);
if (addr_type & IPV6_ADDR_MULTICAST)
rt->u.dst.input = ip6_mc_input;
@@ -955,24 +1073,22 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
rt->u.dst.output = ip6_output;
- ipv6_addr_prefix(&rt->rt6i_dst.addr,
- &rtmsg->rtmsg_dst, rtmsg->rtmsg_dst_len);
- rt->rt6i_dst.plen = rtmsg->rtmsg_dst_len;
+ ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
+ rt->rt6i_dst.plen = cfg->fc_dst_len;
if (rt->rt6i_dst.plen == 128)
rt->u.dst.flags = DST_HOST;
#ifdef CONFIG_IPV6_SUBTREES
- ipv6_addr_prefix(&rt->rt6i_src.addr,
- &rtmsg->rtmsg_src, rtmsg->rtmsg_src_len);
- rt->rt6i_src.plen = rtmsg->rtmsg_src_len;
+ ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
+ rt->rt6i_src.plen = cfg->fc_src_len;
#endif
- rt->rt6i_metric = rtmsg->rtmsg_metric;
+ rt->rt6i_metric = cfg->fc_metric;
/* We cannot add true routes via loopback here,
they would result in kernel looping; promote them to reject routes
*/
- if ((rtmsg->rtmsg_flags&RTF_REJECT) ||
+ if ((cfg->fc_flags & RTF_REJECT) ||
(dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) {
/* hold loopback dev/idev if we haven't done so. */
if (dev != &loopback_dev) {
@@ -995,12 +1111,12 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
goto install_route;
}
- if (rtmsg->rtmsg_flags & RTF_GATEWAY) {
+ if (cfg->fc_flags & RTF_GATEWAY) {
struct in6_addr *gw_addr;
int gwa_type;
- gw_addr = &rtmsg->rtmsg_gateway;
- ipv6_addr_copy(&rt->rt6i_gateway, &rtmsg->rtmsg_gateway);
+ gw_addr = &cfg->fc_gateway;
+ ipv6_addr_copy(&rt->rt6i_gateway, gw_addr);
gwa_type = ipv6_addr_type(gw_addr);
if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) {
@@ -1017,7 +1133,7 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
if (!(gwa_type&IPV6_ADDR_UNICAST))
goto out;
- grt = rt6_lookup(gw_addr, NULL, rtmsg->rtmsg_ifindex, 1);
+ grt = rt6_lookup(gw_addr, NULL, cfg->fc_ifindex, 1);
err = -EHOSTUNREACH;
if (grt == NULL)
@@ -1049,7 +1165,7 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
if (dev == NULL)
goto out;
- if (rtmsg->rtmsg_flags & (RTF_GATEWAY|RTF_NONEXTHOP)) {
+ if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) {
rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev);
if (IS_ERR(rt->rt6i_nexthop)) {
err = PTR_ERR(rt->rt6i_nexthop);
@@ -1058,24 +1174,24 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh,
}
}
- rt->rt6i_flags = rtmsg->rtmsg_flags;
+ rt->rt6i_flags = cfg->fc_flags;
install_route:
- if (rta && rta[RTA_METRICS-1]) {
- int attrlen = RTA_PAYLOAD(rta[RTA_METRICS-1]);
- struct rtattr *attr = RTA_DATA(rta[RTA_METRICS-1]);
-
- while (RTA_OK(attr, attrlen)) {
- unsigned flavor = attr->rta_type;
- if (flavor) {
- if (flavor > RTAX_MAX) {
+ if (cfg->fc_mx) {
+ struct nlattr *nla;
+ int remaining;
+
+ nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
+ int type = nla->nla_type;
+
+ if (type) {
+ if (type > RTAX_MAX) {
err = -EINVAL;
goto out;
}
- rt->u.dst.metrics[flavor-1] =
- *(u32 *)RTA_DATA(attr);
+
+ rt->u.dst.metrics[type - 1] = nla_get_u32(nla);
}
- attr = RTA_NEXT(attr, attrlen);
}
}
@@ -1087,7 +1203,8 @@ install_route:
rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
rt->u.dst.dev = dev;
rt->rt6i_idev = idev;
- return ip6_ins_rt(rt, nlh, _rtattr, req);
+ rt->rt6i_table = table;
+ return __ip6_ins_rt(rt, &cfg->fc_nlinfo);
out:
if (dev)
@@ -1099,51 +1216,65 @@ out:
return err;
}
-int ip6_del_rt(struct rt6_info *rt, struct nlmsghdr *nlh, void *_rtattr, struct netlink_skb_parms *req)
+static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info)
{
int err;
+ struct fib6_table *table;
- write_lock_bh(&rt6_lock);
+ if (rt == &ip6_null_entry)
+ return -ENOENT;
- err = fib6_del(rt, nlh, _rtattr, req);
+ table = rt->rt6i_table;
+ write_lock_bh(&table->tb6_lock);
+
+ err = fib6_del(rt, info);
dst_release(&rt->u.dst);
- write_unlock_bh(&rt6_lock);
+ write_unlock_bh(&table->tb6_lock);
return err;
}
-static int ip6_route_del(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh, void *_rtattr, struct netlink_skb_parms *req)
+int ip6_del_rt(struct rt6_info *rt)
{
+ return __ip6_del_rt(rt, NULL);
+}
+
+static int ip6_route_del(struct fib6_config *cfg)
+{
+ struct fib6_table *table;
struct fib6_node *fn;
struct rt6_info *rt;
int err = -ESRCH;
- read_lock_bh(&rt6_lock);
+ table = fib6_get_table(cfg->fc_table);
+ if (table == NULL)
+ return err;
- fn = fib6_locate(&ip6_routing_table,
- &rtmsg->rtmsg_dst, rtmsg->rtmsg_dst_len,
- &rtmsg->rtmsg_src, rtmsg->rtmsg_src_len);
+ read_lock_bh(&table->tb6_lock);
+
+ fn = fib6_locate(&table->tb6_root,
+ &cfg->fc_dst, cfg->fc_dst_len,
+ &cfg->fc_src, cfg->fc_src_len);
if (fn) {
for (rt = fn->leaf; rt; rt = rt->u.next) {
- if (rtmsg->rtmsg_ifindex &&
+ if (cfg->fc_ifindex &&
(rt->rt6i_dev == NULL ||
- rt->rt6i_dev->ifindex != rtmsg->rtmsg_ifindex))
+ rt->rt6i_dev->ifindex != cfg->fc_ifindex))
continue;
- if (rtmsg->rtmsg_flags&RTF_GATEWAY &&
- !ipv6_addr_equal(&rtmsg->rtmsg_gateway, &rt->rt6i_gateway))
+ if (cfg->fc_flags & RTF_GATEWAY &&
+ !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway))
continue;
- if (rtmsg->rtmsg_metric &&
- rtmsg->rtmsg_metric != rt->rt6i_metric)
+ if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric)
continue;
dst_hold(&rt->u.dst);
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
- return ip6_del_rt(rt, nlh, _rtattr, req);
+ return __ip6_del_rt(rt, &cfg->fc_nlinfo);
}
}
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
return err;
}
@@ -1151,13 +1282,18 @@ static int ip6_route_del(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh, void *_r
/*
* Handle redirects
*/
-void rt6_redirect(struct in6_addr *dest, struct in6_addr *saddr,
- struct neighbour *neigh, u8 *lladdr, int on_link)
+struct ip6rd_flowi {
+ struct flowi fl;
+ struct in6_addr gateway;
+};
+
+static struct rt6_info *__ip6_route_redirect(struct fib6_table *table,
+ struct flowi *fl,
+ int flags)
{
- struct rt6_info *rt, *nrt = NULL;
- int strict;
+ struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl;
+ struct rt6_info *rt;
struct fib6_node *fn;
- struct netevent_redirect netevent;
/*
* Get the "current" route for this destination and
@@ -1169,10 +1305,9 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *saddr,
* is a bit fuzzy and one might need to check all possible
* routes.
*/
- strict = ipv6_addr_type(dest) & (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL);
- read_lock_bh(&rt6_lock);
- fn = fib6_lookup(&ip6_routing_table, dest, NULL);
+ read_lock_bh(&table->tb6_lock);
+ fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
restart:
for (rt = fn->leaf; rt; rt = rt->u.next) {
/*
@@ -1187,29 +1322,60 @@ restart:
continue;
if (!(rt->rt6i_flags & RTF_GATEWAY))
continue;
- if (neigh->dev != rt->rt6i_dev)
+ if (fl->oif != rt->rt6i_dev->ifindex)
continue;
- if (!ipv6_addr_equal(saddr, &rt->rt6i_gateway))
+ if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway))
continue;
break;
}
- if (rt)
- dst_hold(&rt->u.dst);
- else if (strict) {
- while ((fn = fn->parent) != NULL) {
- if (fn->fn_flags & RTN_ROOT)
- break;
- if (fn->fn_flags & RTN_RTINFO)
- goto restart;
- }
- }
- read_unlock_bh(&rt6_lock);
- if (!rt) {
+ if (!rt)
+ rt = &ip6_null_entry;
+ BACKTRACK(&fl->fl6_src);
+out:
+ dst_hold(&rt->u.dst);
+
+ read_unlock_bh(&table->tb6_lock);
+
+ return rt;
+};
+
+static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
+ struct in6_addr *src,
+ struct in6_addr *gateway,
+ struct net_device *dev)
+{
+ struct ip6rd_flowi rdfl = {
+ .fl = {
+ .oif = dev->ifindex,
+ .nl_u = {
+ .ip6_u = {
+ .daddr = *dest,
+ .saddr = *src,
+ },
+ },
+ },
+ .gateway = *gateway,
+ };
+ int flags = rt6_need_strict(dest) ? RT6_LOOKUP_F_IFACE : 0;
+
+ return (struct rt6_info *)fib6_rule_lookup((struct flowi *)&rdfl, flags, __ip6_route_redirect);
+}
+
+void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
+ struct in6_addr *saddr,
+ struct neighbour *neigh, u8 *lladdr, int on_link)
+{
+ struct rt6_info *rt, *nrt = NULL;
+ struct netevent_redirect netevent;
+
+ rt = ip6_route_redirect(dest, src, saddr, neigh->dev);
+
+ if (rt == &ip6_null_entry) {
if (net_ratelimit())
printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop "
"for redirect target\n");
- return;
+ goto out;
}
/*
@@ -1252,7 +1418,7 @@ restart:
nrt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev);
nrt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&nrt->u.dst));
- if (ip6_ins_rt(nrt, NULL, NULL, NULL))
+ if (ip6_ins_rt(nrt))
goto out;
netevent.old = &rt->u.dst;
@@ -1260,7 +1426,7 @@ restart:
call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
if (rt->rt6i_flags&RTF_CACHE) {
- ip6_del_rt(rt, NULL, NULL, NULL);
+ ip6_del_rt(rt);
return;
}
@@ -1342,7 +1508,7 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires);
nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
- ip6_ins_rt(nrt, NULL, NULL, NULL);
+ ip6_ins_rt(nrt);
}
out:
dst_release(&rt->u.dst);
@@ -1378,6 +1544,7 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
#ifdef CONFIG_IPV6_SUBTREES
memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key));
#endif
+ rt->rt6i_table = ort->rt6i_table;
}
return rt;
}
@@ -1388,9 +1555,14 @@ static struct rt6_info *rt6_get_route_info(struct in6_addr *prefix, int prefixle
{
struct fib6_node *fn;
struct rt6_info *rt = NULL;
+ struct fib6_table *table;
+
+ table = fib6_get_table(RT6_TABLE_INFO);
+ if (table == NULL)
+ return NULL;
- write_lock_bh(&rt6_lock);
- fn = fib6_locate(&ip6_routing_table, prefix ,prefixlen, NULL, 0);
+ write_lock_bh(&table->tb6_lock);
+ fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0);
if (!fn)
goto out;
@@ -1405,7 +1577,7 @@ static struct rt6_info *rt6_get_route_info(struct in6_addr *prefix, int prefixle
break;
}
out:
- write_unlock_bh(&rt6_lock);
+ write_unlock_bh(&table->tb6_lock);
return rt;
}
@@ -1413,21 +1585,23 @@ static struct rt6_info *rt6_add_route_info(struct in6_addr *prefix, int prefixle
struct in6_addr *gwaddr, int ifindex,
unsigned pref)
{
- struct in6_rtmsg rtmsg;
+ struct fib6_config cfg = {
+ .fc_table = RT6_TABLE_INFO,
+ .fc_metric = 1024,
+ .fc_ifindex = ifindex,
+ .fc_dst_len = prefixlen,
+ .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO |
+ RTF_UP | RTF_PREF(pref),
+ };
+
+ ipv6_addr_copy(&cfg.fc_dst, prefix);
+ ipv6_addr_copy(&cfg.fc_gateway, gwaddr);
- memset(&rtmsg, 0, sizeof(rtmsg));
- rtmsg.rtmsg_type = RTMSG_NEWROUTE;
- ipv6_addr_copy(&rtmsg.rtmsg_dst, prefix);
- rtmsg.rtmsg_dst_len = prefixlen;
- ipv6_addr_copy(&rtmsg.rtmsg_gateway, gwaddr);
- rtmsg.rtmsg_metric = 1024;
- rtmsg.rtmsg_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | RTF_UP | RTF_PREF(pref);
/* We should treat it as a default route if prefix length is 0. */
if (!prefixlen)
- rtmsg.rtmsg_flags |= RTF_DEFAULT;
- rtmsg.rtmsg_ifindex = ifindex;
+ cfg.fc_flags |= RTF_DEFAULT;
- ip6_route_add(&rtmsg, NULL, NULL, NULL);
+ ip6_route_add(&cfg);
return rt6_get_route_info(prefix, prefixlen, gwaddr, ifindex);
}
@@ -1436,12 +1610,14 @@ static struct rt6_info *rt6_add_route_info(struct in6_addr *prefix, int prefixle
struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev)
{
struct rt6_info *rt;
- struct fib6_node *fn;
+ struct fib6_table *table;
- fn = &ip6_routing_table;
+ table = fib6_get_table(RT6_TABLE_DFLT);
+ if (table == NULL)
+ return NULL;
- write_lock_bh(&rt6_lock);
- for (rt = fn->leaf; rt; rt=rt->u.next) {
+ write_lock_bh(&table->tb6_lock);
+ for (rt = table->tb6_root.leaf; rt; rt=rt->u.next) {
if (dev == rt->rt6i_dev &&
((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) &&
ipv6_addr_equal(&rt->rt6i_gateway, addr))
@@ -1449,7 +1625,7 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
}
if (rt)
dst_hold(&rt->u.dst);
- write_unlock_bh(&rt6_lock);
+ write_unlock_bh(&table->tb6_lock);
return rt;
}
@@ -1457,43 +1633,65 @@ struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
struct net_device *dev,
unsigned int pref)
{
- struct in6_rtmsg rtmsg;
+ struct fib6_config cfg = {
+ .fc_table = RT6_TABLE_DFLT,
+ .fc_metric = 1024,
+ .fc_ifindex = dev->ifindex,
+ .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT |
+ RTF_UP | RTF_EXPIRES | RTF_PREF(pref),
+ };
- memset(&rtmsg, 0, sizeof(struct in6_rtmsg));
- rtmsg.rtmsg_type = RTMSG_NEWROUTE;
- ipv6_addr_copy(&rtmsg.rtmsg_gateway, gwaddr);
- rtmsg.rtmsg_metric = 1024;
- rtmsg.rtmsg_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | RTF_UP | RTF_EXPIRES |
- RTF_PREF(pref);
+ ipv6_addr_copy(&cfg.fc_gateway, gwaddr);
- rtmsg.rtmsg_ifindex = dev->ifindex;
+ ip6_route_add(&cfg);
- ip6_route_add(&rtmsg, NULL, NULL, NULL);
return rt6_get_dflt_router(gwaddr, dev);
}
void rt6_purge_dflt_routers(void)
{
struct rt6_info *rt;
+ struct fib6_table *table;
+
+ /* NOTE: Keep consistent with rt6_get_dflt_router */
+ table = fib6_get_table(RT6_TABLE_DFLT);
+ if (table == NULL)
+ return;
restart:
- read_lock_bh(&rt6_lock);
- for (rt = ip6_routing_table.leaf; rt; rt = rt->u.next) {
+ read_lock_bh(&table->tb6_lock);
+ for (rt = table->tb6_root.leaf; rt; rt = rt->u.next) {
if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) {
dst_hold(&rt->u.dst);
-
- read_unlock_bh(&rt6_lock);
-
- ip6_del_rt(rt, NULL, NULL, NULL);
-
+ read_unlock_bh(&table->tb6_lock);
+ ip6_del_rt(rt);
goto restart;
}
}
- read_unlock_bh(&rt6_lock);
+ read_unlock_bh(&table->tb6_lock);
+}
+
+static void rtmsg_to_fib6_config(struct in6_rtmsg *rtmsg,
+ struct fib6_config *cfg)
+{
+ memset(cfg, 0, sizeof(*cfg));
+
+ cfg->fc_table = RT6_TABLE_MAIN;
+ cfg->fc_ifindex = rtmsg->rtmsg_ifindex;
+ cfg->fc_metric = rtmsg->rtmsg_metric;
+ cfg->fc_expires = rtmsg->rtmsg_info;
+ cfg->fc_dst_len = rtmsg->rtmsg_dst_len;
+ cfg->fc_src_len = rtmsg->rtmsg_src_len;
+ cfg->fc_flags = rtmsg->rtmsg_flags;
+
+ ipv6_addr_copy(&cfg->fc_dst, &rtmsg->rtmsg_dst);
+ ipv6_addr_copy(&cfg->fc_src, &rtmsg->rtmsg_src);
+ ipv6_addr_copy(&cfg->fc_gateway, &rtmsg->rtmsg_gateway);
}
int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
{
+ struct fib6_config cfg;
struct in6_rtmsg rtmsg;
int err;
@@ -1506,14 +1704,16 @@ int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
sizeof(struct in6_rtmsg));
if (err)
return -EFAULT;
-
+
+ rtmsg_to_fib6_config(&rtmsg, &cfg);
+
rtnl_lock();
switch (cmd) {
case SIOCADDRT:
- err = ip6_route_add(&rtmsg, NULL, NULL, NULL);
+ err = ip6_route_add(&cfg);
break;
case SIOCDELRT:
- err = ip6_route_del(&rtmsg, NULL, NULL, NULL);
+ err = ip6_route_del(&cfg);
break;
default:
err = -EINVAL;
@@ -1587,6 +1787,7 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
rt->rt6i_dst.plen = 128;
+ rt->rt6i_table = fib6_get_table(RT6_TABLE_LOCAL);
atomic_set(&rt->u.dst.__refcnt, 1);
@@ -1605,9 +1806,7 @@ static int fib6_ifdown(struct rt6_info *rt, void *arg)
void rt6_ifdown(struct net_device *dev)
{
- write_lock_bh(&rt6_lock);
- fib6_clean_tree(&ip6_routing_table, fib6_ifdown, 0, dev);
- write_unlock_bh(&rt6_lock);
+ fib6_clean_all(fib6_ifdown, 0, dev);
}
struct rt6_mtu_change_arg
@@ -1657,80 +1856,114 @@ static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg)
void rt6_mtu_change(struct net_device *dev, unsigned mtu)
{
- struct rt6_mtu_change_arg arg;
+ struct rt6_mtu_change_arg arg = {
+ .dev = dev,
+ .mtu = mtu,
+ };
- arg.dev = dev;
- arg.mtu = mtu;
- read_lock_bh(&rt6_lock);
- fib6_clean_tree(&ip6_routing_table, rt6_mtu_change_route, 0, &arg);
- read_unlock_bh(&rt6_lock);
+ fib6_clean_all(rt6_mtu_change_route, 0, &arg);
}
-static int inet6_rtm_to_rtmsg(struct rtmsg *r, struct rtattr **rta,
- struct in6_rtmsg *rtmsg)
+static struct nla_policy rtm_ipv6_policy[RTA_MAX+1] __read_mostly = {
+ [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) },
+ [RTA_OIF] = { .type = NLA_U32 },
+ [RTA_IIF] = { .type = NLA_U32 },
+ [RTA_PRIORITY] = { .type = NLA_U32 },
+ [RTA_METRICS] = { .type = NLA_NESTED },
+};
+
+static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct fib6_config *cfg)
{
- memset(rtmsg, 0, sizeof(*rtmsg));
+ struct rtmsg *rtm;
+ struct nlattr *tb[RTA_MAX+1];
+ int err;
- rtmsg->rtmsg_dst_len = r->rtm_dst_len;
- rtmsg->rtmsg_src_len = r->rtm_src_len;
- rtmsg->rtmsg_flags = RTF_UP;
- if (r->rtm_type == RTN_UNREACHABLE)
- rtmsg->rtmsg_flags |= RTF_REJECT;
+ err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
+ if (err < 0)
+ goto errout;
- if (rta[RTA_GATEWAY-1]) {
- if (rta[RTA_GATEWAY-1]->rta_len != RTA_LENGTH(16))
- return -EINVAL;
- memcpy(&rtmsg->rtmsg_gateway, RTA_DATA(rta[RTA_GATEWAY-1]), 16);
- rtmsg->rtmsg_flags |= RTF_GATEWAY;
- }
- if (rta[RTA_DST-1]) {
- if (RTA_PAYLOAD(rta[RTA_DST-1]) < ((r->rtm_dst_len+7)>>3))
- return -EINVAL;
- memcpy(&rtmsg->rtmsg_dst, RTA_DATA(rta[RTA_DST-1]), ((r->rtm_dst_len+7)>>3));
+ err = -EINVAL;
+ rtm = nlmsg_data(nlh);
+ memset(cfg, 0, sizeof(*cfg));
+
+ cfg->fc_table = rtm->rtm_table;
+ cfg->fc_dst_len = rtm->rtm_dst_len;
+ cfg->fc_src_len = rtm->rtm_src_len;
+ cfg->fc_flags = RTF_UP;
+ cfg->fc_protocol = rtm->rtm_protocol;
+
+ if (rtm->rtm_type == RTN_UNREACHABLE)
+ cfg->fc_flags |= RTF_REJECT;
+
+ cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
+ cfg->fc_nlinfo.nlh = nlh;
+
+ if (tb[RTA_GATEWAY]) {
+ nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16);
+ cfg->fc_flags |= RTF_GATEWAY;
}
- if (rta[RTA_SRC-1]) {
- if (RTA_PAYLOAD(rta[RTA_SRC-1]) < ((r->rtm_src_len+7)>>3))
- return -EINVAL;
- memcpy(&rtmsg->rtmsg_src, RTA_DATA(rta[RTA_SRC-1]), ((r->rtm_src_len+7)>>3));
+
+ if (tb[RTA_DST]) {
+ int plen = (rtm->rtm_dst_len + 7) >> 3;
+
+ if (nla_len(tb[RTA_DST]) < plen)
+ goto errout;
+
+ nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen);
}
- if (rta[RTA_OIF-1]) {
- if (rta[RTA_OIF-1]->rta_len != RTA_LENGTH(sizeof(int)))
- return -EINVAL;
- memcpy(&rtmsg->rtmsg_ifindex, RTA_DATA(rta[RTA_OIF-1]), sizeof(int));
+
+ if (tb[RTA_SRC]) {
+ int plen = (rtm->rtm_src_len + 7) >> 3;
+
+ if (nla_len(tb[RTA_SRC]) < plen)
+ goto errout;
+
+ nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen);
}
- if (rta[RTA_PRIORITY-1]) {
- if (rta[RTA_PRIORITY-1]->rta_len != RTA_LENGTH(4))
- return -EINVAL;
- memcpy(&rtmsg->rtmsg_metric, RTA_DATA(rta[RTA_PRIORITY-1]), 4);
+
+ if (tb[RTA_OIF])
+ cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]);
+
+ if (tb[RTA_PRIORITY])
+ cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]);
+
+ if (tb[RTA_METRICS]) {
+ cfg->fc_mx = nla_data(tb[RTA_METRICS]);
+ cfg->fc_mx_len = nla_len(tb[RTA_METRICS]);
}
- return 0;
+
+ if (tb[RTA_TABLE])
+ cfg->fc_table = nla_get_u32(tb[RTA_TABLE]);
+
+ err = 0;
+errout:
+ return err;
}
int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
- struct rtmsg *r = NLMSG_DATA(nlh);
- struct in6_rtmsg rtmsg;
+ struct fib6_config cfg;
+ int err;
- if (inet6_rtm_to_rtmsg(r, arg, &rtmsg))
- return -EINVAL;
- return ip6_route_del(&rtmsg, nlh, arg, &NETLINK_CB(skb));
+ err = rtm_to_fib6_config(skb, nlh, &cfg);
+ if (err < 0)
+ return err;
+
+ return ip6_route_del(&cfg);
}
int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
- struct rtmsg *r = NLMSG_DATA(nlh);
- struct in6_rtmsg rtmsg;
+ struct fib6_config cfg;
+ int err;
- if (inet6_rtm_to_rtmsg(r, arg, &rtmsg))
- return -EINVAL;
- return ip6_route_add(&rtmsg, nlh, arg, &NETLINK_CB(skb));
-}
+ err = rtm_to_fib6_config(skb, nlh, &cfg);
+ if (err < 0)
+ return err;
-struct rt6_rtnl_dump_arg
-{
- struct sk_buff *skb;
- struct netlink_callback *cb;
-};
+ return ip6_route_add(&cfg);
+}
static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
struct in6_addr *dst, struct in6_addr *src,
@@ -1738,9 +1971,9 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
int prefix, unsigned int flags)
{
struct rtmsg *rtm;
- struct nlmsghdr *nlh;
- unsigned char *b = skb->tail;
+ struct nlmsghdr *nlh;
struct rta_cacheinfo ci;
+ u32 table;
if (prefix) { /* user wants prefix routes only */
if (!(rt->rt6i_flags & RTF_PREFIX_RT)) {
@@ -1749,13 +1982,21 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
}
}
- nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*rtm), flags);
- rtm = NLMSG_DATA(nlh);
+ nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtm), flags);
+ if (nlh == NULL)
+ return -ENOBUFS;
+
+ rtm = nlmsg_data(nlh);
rtm->rtm_family = AF_INET6;
rtm->rtm_dst_len = rt->rt6i_dst.plen;
rtm->rtm_src_len = rt->rt6i_src.plen;
rtm->rtm_tos = 0;
- rtm->rtm_table = RT_TABLE_MAIN;
+ if (rt->rt6i_table)
+ table = rt->rt6i_table->tb6_id;
+ else
+ table = RT6_TABLE_UNSPEC;
+ rtm->rtm_table = table;
+ NLA_PUT_U32(skb, RTA_TABLE, table);
if (rt->rt6i_flags&RTF_REJECT)
rtm->rtm_type = RTN_UNREACHABLE;
else if (rt->rt6i_dev && (rt->rt6i_dev->flags&IFF_LOOPBACK))
@@ -1776,31 +2017,35 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
rtm->rtm_flags |= RTM_F_CLONED;
if (dst) {
- RTA_PUT(skb, RTA_DST, 16, dst);
+ NLA_PUT(skb, RTA_DST, 16, dst);
rtm->rtm_dst_len = 128;
} else if (rtm->rtm_dst_len)
- RTA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr);
+ NLA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr);
#ifdef CONFIG_IPV6_SUBTREES
if (src) {
- RTA_PUT(skb, RTA_SRC, 16, src);
+ NLA_PUT(skb, RTA_SRC, 16, src);
rtm->rtm_src_len = 128;
} else if (rtm->rtm_src_len)
- RTA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr);
+ NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr);
#endif
if (iif)
- RTA_PUT(skb, RTA_IIF, 4, &iif);
+ NLA_PUT_U32(skb, RTA_IIF, iif);
else if (dst) {
struct in6_addr saddr_buf;
if (ipv6_get_saddr(&rt->u.dst, dst, &saddr_buf) == 0)
- RTA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
+ NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
}
+
if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0)
- goto rtattr_failure;
+ goto nla_put_failure;
+
if (rt->u.dst.neighbour)
- RTA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key);
+ NLA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key);
+
if (rt->u.dst.dev)
- RTA_PUT(skb, RTA_OIF, sizeof(int), &rt->rt6i_dev->ifindex);
- RTA_PUT(skb, RTA_PRIORITY, 4, &rt->rt6i_metric);
+ NLA_PUT_U32(skb, RTA_OIF, rt->rt6i_dev->ifindex);
+
+ NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric);
ci.rta_lastuse = jiffies_to_clock_t(jiffies - rt->u.dst.lastuse);
if (rt->rt6i_expires)
ci.rta_expires = jiffies_to_clock_t(rt->rt6i_expires - jiffies);
@@ -1812,23 +2057,21 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
ci.rta_id = 0;
ci.rta_ts = 0;
ci.rta_tsage = 0;
- RTA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
+ NLA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
-nlmsg_failure:
-rtattr_failure:
- skb_trim(skb, b - skb->data);
- return -1;
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ return nlmsg_cancel(skb, nlh);
}
-static int rt6_dump_route(struct rt6_info *rt, void *p_arg)
+int rt6_dump_route(struct rt6_info *rt, void *p_arg)
{
struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg;
int prefix;
- if (arg->cb->nlh->nlmsg_len >= NLMSG_LENGTH(sizeof(struct rtmsg))) {
- struct rtmsg *rtm = NLMSG_DATA(arg->cb->nlh);
+ if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) {
+ struct rtmsg *rtm = nlmsg_data(arg->cb->nlh);
prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0;
} else
prefix = 0;
@@ -1838,189 +2081,108 @@ static int rt6_dump_route(struct rt6_info *rt, void *p_arg)
prefix, NLM_F_MULTI);
}
-static int fib6_dump_node(struct fib6_walker_t *w)
+int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
{
- int res;
+ struct nlattr *tb[RTA_MAX+1];
struct rt6_info *rt;
+ struct sk_buff *skb;
+ struct rtmsg *rtm;
+ struct flowi fl;
+ int err, iif = 0;
- for (rt = w->leaf; rt; rt = rt->u.next) {
- res = rt6_dump_route(rt, w->args);
- if (res < 0) {
- /* Frame is full, suspend walking */
- w->leaf = rt;
- return 1;
- }
- BUG_TRAP(res!=0);
- }
- w->leaf = NULL;
- return 0;
-}
-
-static void fib6_dump_end(struct netlink_callback *cb)
-{
- struct fib6_walker_t *w = (void*)cb->args[0];
-
- if (w) {
- cb->args[0] = 0;
- fib6_walker_unlink(w);
- kfree(w);
- }
- cb->done = (void*)cb->args[1];
- cb->args[1] = 0;
-}
-
-static int fib6_dump_done(struct netlink_callback *cb)
-{
- fib6_dump_end(cb);
- return cb->done ? cb->done(cb) : 0;
-}
-
-int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
-{
- struct rt6_rtnl_dump_arg arg;
- struct fib6_walker_t *w;
- int res;
+ err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
+ if (err < 0)
+ goto errout;
- arg.skb = skb;
- arg.cb = cb;
+ err = -EINVAL;
+ memset(&fl, 0, sizeof(fl));
- w = (void*)cb->args[0];
- if (w == NULL) {
- /* New dump:
- *
- * 1. hook callback destructor.
- */
- cb->args[1] = (long)cb->done;
- cb->done = fib6_dump_done;
+ if (tb[RTA_SRC]) {
+ if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr))
+ goto errout;
- /*
- * 2. allocate and initialize walker.
- */
- w = kzalloc(sizeof(*w), GFP_ATOMIC);
- if (w == NULL)
- return -ENOMEM;
- RT6_TRACE("dump<%p", w);
- w->root = &ip6_routing_table;
- w->func = fib6_dump_node;
- w->args = &arg;
- cb->args[0] = (long)w;
- read_lock_bh(&rt6_lock);
- res = fib6_walk(w);
- read_unlock_bh(&rt6_lock);
- } else {
- w->args = &arg;
- read_lock_bh(&rt6_lock);
- res = fib6_walk_continue(w);
- read_unlock_bh(&rt6_lock);
+ ipv6_addr_copy(&fl.fl6_src, nla_data(tb[RTA_SRC]));
}
-#if RT6_DEBUG >= 3
- if (res <= 0 && skb->len == 0)
- RT6_TRACE("%p>dump end\n", w);
-#endif
- res = res < 0 ? res : skb->len;
- /* res < 0 is an error. (really, impossible)
- res == 0 means that dump is complete, but skb still can contain data.
- res > 0 dump is not complete, but frame is full.
- */
- /* Destroy walker, if dump of this table is complete. */
- if (res <= 0)
- fib6_dump_end(cb);
- return res;
-}
-
-int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
-{
- struct rtattr **rta = arg;
- int iif = 0;
- int err = -ENOBUFS;
- struct sk_buff *skb;
- struct flowi fl;
- struct rt6_info *rt;
- skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
- if (skb == NULL)
- goto out;
+ if (tb[RTA_DST]) {
+ if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr))
+ goto errout;
- /* Reserve room for dummy headers, this skb can pass
- through good chunk of routing engine.
- */
- skb->mac.raw = skb->data;
- skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
+ ipv6_addr_copy(&fl.fl6_dst, nla_data(tb[RTA_DST]));
+ }
- memset(&fl, 0, sizeof(fl));
- if (rta[RTA_SRC-1])
- ipv6_addr_copy(&fl.fl6_src,
- (struct in6_addr*)RTA_DATA(rta[RTA_SRC-1]));
- if (rta[RTA_DST-1])
- ipv6_addr_copy(&fl.fl6_dst,
- (struct in6_addr*)RTA_DATA(rta[RTA_DST-1]));
+ if (tb[RTA_IIF])
+ iif = nla_get_u32(tb[RTA_IIF]);
- if (rta[RTA_IIF-1])
- memcpy(&iif, RTA_DATA(rta[RTA_IIF-1]), sizeof(int));
+ if (tb[RTA_OIF])
+ fl.oif = nla_get_u32(tb[RTA_OIF]);
if (iif) {
struct net_device *dev;
dev = __dev_get_by_index(iif);
if (!dev) {
err = -ENODEV;
- goto out_free;
+ goto errout;
}
}
- fl.oif = 0;
- if (rta[RTA_OIF-1])
- memcpy(&fl.oif, RTA_DATA(rta[RTA_OIF-1]), sizeof(int));
+ skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (skb == NULL) {
+ err = -ENOBUFS;
+ goto errout;
+ }
- rt = (struct rt6_info*)ip6_route_output(NULL, &fl);
+ /* Reserve room for dummy headers, this skb can pass
+ through good chunk of routing engine.
+ */
+ skb->mac.raw = skb->data;
+ skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
+ rt = (struct rt6_info*) ip6_route_output(NULL, &fl);
skb->dst = &rt->u.dst;
- NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
- err = rt6_fill_node(skb, rt,
- &fl.fl6_dst, &fl.fl6_src,
- iif,
+ err = rt6_fill_node(skb, rt, &fl.fl6_dst, &fl.fl6_src, iif,
RTM_NEWROUTE, NETLINK_CB(in_skb).pid,
nlh->nlmsg_seq, 0, 0);
if (err < 0) {
- err = -EMSGSIZE;
- goto out_free;
+ kfree_skb(skb);
+ goto errout;
}
- err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
- if (err > 0)
- err = 0;
-out:
+ err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
+errout:
return err;
-out_free:
- kfree_skb(skb);
- goto out;
}
-void inet6_rt_notify(int event, struct rt6_info *rt, struct nlmsghdr *nlh,
- struct netlink_skb_parms *req)
+void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info)
{
struct sk_buff *skb;
- int size = NLMSG_SPACE(sizeof(struct rtmsg)+256);
- u32 pid = current->pid;
- u32 seq = 0;
-
- if (req)
- pid = req->pid;
- if (nlh)
- seq = nlh->nlmsg_seq;
-
- skb = alloc_skb(size, gfp_any());
- if (!skb) {
- netlink_set_err(rtnl, 0, RTNLGRP_IPV6_ROUTE, ENOBUFS);
- return;
+ u32 pid = 0, seq = 0;
+ struct nlmsghdr *nlh = NULL;
+ int payload = sizeof(struct rtmsg) + 256;
+ int err = -ENOBUFS;
+
+ if (info) {
+ pid = info->pid;
+ nlh = info->nlh;
+ if (nlh)
+ seq = nlh->nlmsg_seq;
}
- if (rt6_fill_node(skb, rt, NULL, NULL, 0, event, pid, seq, 0, 0) < 0) {
+
+ skb = nlmsg_new(nlmsg_total_size(payload), gfp_any());
+ if (skb == NULL)
+ goto errout;
+
+ err = rt6_fill_node(skb, rt, NULL, NULL, 0, event, pid, seq, 0, 0);
+ if (err < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTNLGRP_IPV6_ROUTE, EINVAL);
- return;
+ goto errout;
}
- NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_ROUTE;
- netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_ROUTE, gfp_any());
+
+ err = rtnl_notify(skb, pid, RTNLGRP_IPV6_ROUTE, nlh, gfp_any());
+errout:
+ if (err < 0)
+ rtnl_set_sk_err(RTNLGRP_IPV6_ROUTE, err);
}
/*
@@ -2096,16 +2258,13 @@ static int rt6_info_route(struct rt6_info *rt, void *p_arg)
static int rt6_proc_info(char *buffer, char **start, off_t offset, int length)
{
- struct rt6_proc_arg arg;
- arg.buffer = buffer;
- arg.offset = offset;
- arg.length = length;
- arg.skip = 0;
- arg.len = 0;
+ struct rt6_proc_arg arg = {
+ .buffer = buffer,
+ .offset = offset,
+ .length = length,
+ };
- read_lock_bh(&rt6_lock);
- fib6_clean_tree(&ip6_routing_table, rt6_info_route, 0, &arg);
- read_unlock_bh(&rt6_lock);
+ fib6_clean_all(rt6_info_route, 0, &arg);
*start = buffer;
if (offset)
@@ -2260,13 +2419,9 @@ void __init ip6_route_init(void)
{
struct proc_dir_entry *p;
- ip6_dst_ops.kmem_cachep = kmem_cache_create("ip6_dst_cache",
- sizeof(struct rt6_info),
- 0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!ip6_dst_ops.kmem_cachep)
- panic("cannot create ip6_dst_cache");
-
+ ip6_dst_ops.kmem_cachep =
+ kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0,
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
fib6_init();
#ifdef CONFIG_PROC_FS
p = proc_net_create("ipv6_route", 0, rt6_proc_info);
@@ -2278,10 +2433,16 @@ void __init ip6_route_init(void)
#ifdef CONFIG_XFRM
xfrm6_init();
#endif
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ fib6_rules_init();
+#endif
}
void ip6_route_cleanup(void)
{
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ fib6_rules_cleanup();
+#endif
#ifdef CONFIG_PROC_FS
proc_net_remove("ipv6_route");
proc_net_remove("rt6_stats");
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 07:01:12 +0000