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authorMark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>2016-09-05 10:20:20 +1200
committerDavid S. Miller <davem@davemloft.net>2016-09-06 13:56:13 -0700
commit5a56a0b3a45dd0cc5b2f7bec6afd053a474ed9f5 (patch)
tree817eb48162ca954a29d301a60d2792ab1af47eb4
parentdaa7ee8dfa64233789221685e73a6ef8159f80de (diff)
downloadlinux-stericsson-5a56a0b3a45dd0cc5b2f7bec6afd053a474ed9f5.tar.gz
net: Don't delete routes in different VRFs
When deleting an IP address from an interface, there is a clean-up of routes which refer to this local address. However, there was no check to see that the VRF matched. This meant that deletion wasn't confined to the VRF it should have been. To solve this, a new field has been added to fib_info to hold a table id. When removing fib entries corresponding to a local ip address, this table id is also used in the comparison. The table id is populated when the fib_info is created. This was already done in some places, but not in ip_rt_ioctl(). This has now been fixed. Fixes: 021dd3b8a142 ("net: Add routes to the table associated with the device") Acked-by: David Ahern <dsa@cumulusnetworks.com> Tested-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/ip_fib.h3
-rw-r--r--net/ipv4/fib_frontend.c3
-rw-r--r--net/ipv4/fib_semantics.c8
3 files changed, 10 insertions, 4 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 4079fc18ffe4..7d4a72e75f33 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -111,6 +111,7 @@ struct fib_info {
unsigned char fib_scope;
unsigned char fib_type;
__be32 fib_prefsrc;
+ u32 fib_tb_id;
u32 fib_priority;
u32 *fib_metrics;
#define fib_mtu fib_metrics[RTAX_MTU-1]
@@ -319,7 +320,7 @@ void fib_flush_external(struct net *net);
/* Exported by fib_semantics.c */
int ip_fib_check_default(__be32 gw, struct net_device *dev);
int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force);
-int fib_sync_down_addr(struct net *net, __be32 local);
+int fib_sync_down_addr(struct net_device *dev, __be32 local);
int fib_sync_up(struct net_device *dev, unsigned int nh_flags);
extern u32 fib_multipath_secret __read_mostly;
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index ef2ebeb89d0f..1b25daf8c7f1 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -509,6 +509,7 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
if (!dev)
return -ENODEV;
cfg->fc_oif = dev->ifindex;
+ cfg->fc_table = l3mdev_fib_table(dev);
if (colon) {
struct in_ifaddr *ifa;
struct in_device *in_dev = __in_dev_get_rtnl(dev);
@@ -1027,7 +1028,7 @@ no_promotions:
* First of all, we scan fib_info list searching
* for stray nexthop entries, then ignite fib_flush.
*/
- if (fib_sync_down_addr(dev_net(dev), ifa->ifa_local))
+ if (fib_sync_down_addr(dev, ifa->ifa_local))
fib_flush(dev_net(dev));
}
}
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 539fa264e67d..e9f56225e53f 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1057,6 +1057,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
fi->fib_priority = cfg->fc_priority;
fi->fib_prefsrc = cfg->fc_prefsrc;
fi->fib_type = cfg->fc_type;
+ fi->fib_tb_id = cfg->fc_table;
fi->fib_nhs = nhs;
change_nexthops(fi) {
@@ -1337,18 +1338,21 @@ nla_put_failure:
* referring to it.
* - device went down -> we must shutdown all nexthops going via it.
*/
-int fib_sync_down_addr(struct net *net, __be32 local)
+int fib_sync_down_addr(struct net_device *dev, __be32 local)
{
int ret = 0;
unsigned int hash = fib_laddr_hashfn(local);
struct hlist_head *head = &fib_info_laddrhash[hash];
+ struct net *net = dev_net(dev);
+ int tb_id = l3mdev_fib_table(dev);
struct fib_info *fi;
if (!fib_info_laddrhash || local == 0)
return 0;
hlist_for_each_entry(fi, head, fib_lhash) {
- if (!net_eq(fi->fib_net, net))
+ if (!net_eq(fi->fib_net, net) ||
+ fi->fib_tb_id != tb_id)
continue;
if (fi->fib_prefsrc == local) {
fi->fib_flags |= RTNH_F_DEAD;