-/*
- * Find the first device with a given source address.
+/**
+ * __ip_dev_find - find the first device with a given source address.
+ * @net: the net namespace
+ * @addr: the source address
+ * @devref: if true, take a reference on the found device
+ *
+ * If a caller uses devref=false, it should be protected by RCU, or RTNL
- local_table = fib_get_table(net, RT_TABLE_LOCAL);
- if (!local_table || fib_table_lookup(local_table, &fl, &res))
+ rcu_read_lock();
+ if (fib_lookup(net, &fl, &res)) {
+ rcu_read_unlock();
- if (!fib_table_lookup(local_table, &fl, &res)) {
+ rcu_read_lock();
+ if (!fib_table_lookup(local_table, &fl, &res, FIB_LOOKUP_NOREF)) {
}
EXPORT_SYMBOL(inet_dev_addr_type);
/* Given (packet source, input interface) and optional (dst, oif, tos):
}
EXPORT_SYMBOL(inet_dev_addr_type);
/* Given (packet source, input interface) and optional (dst, oif, tos):
- - (main) check, that source is valid i.e. not broadcast or our local
- address.
- - figure out what "logical" interface this packet arrived
- and calculate "specific destination" address.
- - check, that packet arrived from expected physical interface.
+ * - (main) check, that source is valid i.e. not broadcast or our local
+ * address.
+ * - figure out what "logical" interface this packet arrived
+ * and calculate "specific destination" address.
+ * - check, that packet arrived from expected physical interface.
+ * called with rcu_read_lock()
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;
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;
}
*spec_dst = FIB_RES_PREFSRC(res);
fib_combine_itag(itag, &res);
}
*spec_dst = FIB_RES_PREFSRC(res);
fib_combine_itag(itag, &res);
[RTA_DST] = { .type = NLA_U32 },
[RTA_SRC] = { .type = NLA_U32 },
[RTA_IIF] = { .type = NLA_U32 },
[RTA_DST] = { .type = NLA_U32 },
[RTA_SRC] = { .type = NLA_U32 },
[RTA_IIF] = { .type = NLA_U32 },
- Really, it should be netlink message, but :-( netlink
- can be not configured, so that we feed it directly
- to fib engine. It is legal, because all events occur
- only when netlink is already locked.
+ * Really, it should be netlink message, but :-( netlink
+ * can be not configured, so that we feed it directly
+ * to fib engine. It is legal, because all events occur
+ * only when netlink is already locked.
static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa)
{
struct net *net = dev_net(ifa->ifa_dev->dev);
static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa)
{
struct net *net = dev_net(ifa->ifa_dev->dev);
struct in_ifaddr *prim = ifa;
__be32 mask = ifa->ifa_mask;
__be32 addr = ifa->ifa_local;
struct in_ifaddr *prim = ifa;
__be32 mask = ifa->ifa_mask;
__be32 addr = ifa->ifa_local;
prim = inet_ifa_byprefix(in_dev, prefix, mask);
if (prim == NULL) {
printk(KERN_WARNING "fib_add_ifaddr: bug: prim == NULL\n");
prim = inet_ifa_byprefix(in_dev, prefix, mask);
if (prim == NULL) {
printk(KERN_WARNING "fib_add_ifaddr: bug: prim == NULL\n");
fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim);
fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim);
return;
/* Add broadcast address, if it is explicitly assigned. */
if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF))
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
return;
/* Add broadcast address, if it is explicitly assigned. */
if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF))
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
- fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL :
- RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim);
+ fib_magic(RTM_NEWROUTE,
+ dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
+ prefix, ifa->ifa_prefixlen, prim);
/* Add network specific broadcasts, when it takes a sense */
if (ifa->ifa_prefixlen < 31) {
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim);
/* Add network specific broadcasts, when it takes a sense */
if (ifa->ifa_prefixlen < 31) {
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim);
- fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix|~mask, 32, prim);
+ fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix | ~mask,
+ 32, prim);
- if (!(ifa->ifa_flags&IFA_F_SECONDARY))
- fib_magic(RTM_DELROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL :
- RTN_UNICAST, any, ifa->ifa_prefixlen, prim);
+ if (!(ifa->ifa_flags & IFA_F_SECONDARY))
+ fib_magic(RTM_DELROUTE,
+ dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
+ any, ifa->ifa_prefixlen, prim);
- We should take care of not to delete too much :-)
-
- Scan address list to be sure that addresses are really gone.
+ * We should take care of not to delete too much :-)
+ *
+ * Scan address list to be sure that addresses are really gone.
fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim);
fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim);
fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim);
fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim);
fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim);
/* Check, that this local address finally disappeared. */
if (inet_addr_type(dev_net(dev), ifa->ifa_local) != RTN_LOCAL) {
/* And the last, but not the least thing.
fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim);
/* Check, that this local address finally disappeared. */
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.
- */
+ * We must flush stray FIB entries.
+ *
+ * First of all, we scan fib_info list searching
+ * for stray nexthop entries, then ignite fib_flush.
+ */
- struct flowi fl = { .mark = frn->fl_mark,
- .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
- .tos = frn->fl_tos,
- .scope = frn->fl_scope } } };
+ struct flowi fl = {
+ .mark = frn->fl_mark,
+ .fl4_dst = frn->fl_addr,
+ .fl4_tos = frn->fl_tos,
+ .fl4_scope = frn->fl_scope,
+ };
- frn->err = fib_table_lookup(tb, &fl, &res);
+ rcu_read_lock();
+ frn->err = fib_table_lookup(tb, &fl, &res, FIB_LOOKUP_NOREF);
- pid = NETLINK_CB(skb).pid; /* pid of sending process */
- NETLINK_CB(skb).pid = 0; /* from kernel */
+ pid = NETLINK_CB(skb).pid; /* pid of sending process */
+ NETLINK_CB(skb).pid = 0; /* from kernel */
NETLINK_CB(skb).dst_group = 0; /* unicast */
netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT);
}
NETLINK_CB(skb).dst_group = 0; /* unicast */
netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT);
}
hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) {
hlist_del(node);
fib_table_flush(tb);
hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) {
hlist_del(node);
fib_table_flush(tb);