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| author |   Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2015-07-14 16:35:53 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-07-15 21:33:39 -0700 |
| commit | 6640e673c6f3dbaace085ca2686a8a343dc23a71 (patch) | |
| tree | 54c6f43e8d9b0e47dbab468aa2daa693ada3277d /drivers/net/ipvlan | |
| parent | ipvlan: plug memory leak in ipvlan_link_delete (diff) | |
| download | linux-dev-6640e673c6f3dbaace085ca2686a8a343dc23a71.tar.xz linux-dev-6640e673c6f3dbaace085ca2686a8a343dc23a71.zip | |
ipvlan: unhash addresses without synchronize_rcu
All structures used in traffic forwarding are rcu-protected:
ipvl_addr, ipvl_dev and ipvl_port. Thus we can unhash addresses
without synchronization. We'll anyway hash it back into the same
bucket: in worst case lockless lookup will scan hash once again.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ipvlan')
| -rw-r--r-- | drivers/net/ipvlan/ipvlan.h | 2 | ||||
| -rw-r--r-- | drivers/net/ipvlan/ipvlan_core.c | 4 | ||||
| -rw-r--r-- | drivers/net/ipvlan/ipvlan_main.c | 8 |
3 files changed, 6 insertions, 8 deletions
diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h index 68e2549c28c6..40f9d7e4a0ea 100644 --- a/drivers/net/ipvlan/ipvlan.h +++ b/drivers/net/ipvlan/ipvlan.h @@ -122,5 +122,5 @@ struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6); struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port, const void *iaddr, bool is_v6); -void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync); +void ipvlan_ht_addr_del(struct ipvl_addr *addr); #endif /* __IPVLAN_H */ diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c index 8afbedad620d..8f8628a0adba 100644 --- a/drivers/net/ipvlan/ipvlan_core.c +++ b/drivers/net/ipvlan/ipvlan_core.c @@ -85,11 +85,9 @@ void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr) hlist_add_head_rcu(&addr->hlnode, &port->hlhead[hash]); } -void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync) +void ipvlan_ht_addr_del(struct ipvl_addr *addr) { hlist_del_init_rcu(&addr->hlnode); - if (sync) - synchronize_rcu(); } struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c index 7d81e37c3f76..e995bc501ee6 100644 --- a/drivers/net/ipvlan/ipvlan_main.c +++ b/drivers/net/ipvlan/ipvlan_main.c @@ -171,7 +171,7 @@ static int ipvlan_stop(struct net_device *dev) dev_uc_del(phy_dev, phy_dev->dev_addr); list_for_each_entry(addr, &ipvlan->addrs, anode) - ipvlan_ht_addr_del(addr, !dev->dismantle); + ipvlan_ht_addr_del(addr); return 0; } @@ -505,7 +505,7 @@ static void ipvlan_link_delete(struct net_device *dev, struct list_head *head) struct ipvl_addr *addr, *next; list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { - ipvlan_ht_addr_del(addr, !dev->dismantle); + ipvlan_ht_addr_del(addr); list_del(&addr->anode); kfree_rcu(addr, rcu); } @@ -641,7 +641,7 @@ static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) if (!addr) return; - ipvlan_ht_addr_del(addr, true); + ipvlan_ht_addr_del(addr); list_del(&addr->anode); kfree_rcu(addr, rcu); @@ -711,7 +711,7 @@ static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) if (!addr) return; - ipvlan_ht_addr_del(addr, true); + ipvlan_ht_addr_del(addr); list_del(&addr->anode); kfree_rcu(addr, rcu); |