diff options
| author |   Nikolay Aleksandrov <nikolay@cumulusnetworks.com> | 2015-10-12 21:47:05 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-10-13 04:57:58 -0700 |
| commit | f409d0ed87d2721e1099ce36266e98c5aea2d486 (patch) | |
| tree | ebe13617bfc4b22390d6a73f73f9a1db9b20deb6 /net/bridge/br_vlan.c | |
| parent | bridge: vlan: drop unnecessary flush code (diff) | |
| download | linux-dev-f409d0ed87d2721e1099ce36266e98c5aea2d486.tar.xz linux-dev-f409d0ed87d2721e1099ce36266e98c5aea2d486.zip | |
bridge: vlan: move back vlan_flush
Ido Schimmel reported a problem with switchdev devices because of the
order change of del_nbp operations, more specifically the move of
nbp_vlan_flush() which deletes all vlans and frees vlgrp after the
rx_handler has been unregistered. So in order to fix this move
vlan_flush back where it was and make it destroy the rhtable after
NULLing vlgrp and waiting a grace period to make sure noone can see it.
Reported-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_vlan.c')
| -rw-r--r-- | net/bridge/br_vlan.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 85e67568092e..5f0d0cc4744f 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -307,15 +307,20 @@ out: return err; } -static void __vlan_flush(struct net_bridge_vlan_group *vlgrp) +static void __vlan_group_free(struct net_bridge_vlan_group *vg) +{ + WARN_ON(!list_empty(&vg->vlan_list)); + rhashtable_destroy(&vg->vlan_hash); + kfree(vg); +} + +static void __vlan_flush(struct net_bridge_vlan_group *vg) { struct net_bridge_vlan *vlan, *tmp; - __vlan_delete_pvid(vlgrp, vlgrp->pvid); - list_for_each_entry_safe(vlan, tmp, &vlgrp->vlan_list, vlist) + __vlan_delete_pvid(vg, vg->pvid); + list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) __vlan_del(vlan); - rhashtable_destroy(&vlgrp->vlan_hash); - kfree_rcu(vlgrp, rcu); } struct sk_buff *br_handle_vlan(struct net_bridge *br, @@ -571,9 +576,15 @@ int br_vlan_delete(struct net_bridge *br, u16 vid) void br_vlan_flush(struct net_bridge *br) { + struct net_bridge_vlan_group *vg; + ASSERT_RTNL(); - __vlan_flush(br_vlan_group(br)); + vg = br_vlan_group(br); + __vlan_flush(vg); + RCU_INIT_POINTER(br->vlgrp, NULL); + synchronize_rcu(); + __vlan_group_free(vg); } struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) @@ -959,7 +970,13 @@ int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) void nbp_vlan_flush(struct net_bridge_port *port) { + struct net_bridge_vlan_group *vg; + ASSERT_RTNL(); - __vlan_flush(nbp_vlan_group(port)); + vg = nbp_vlan_group(port); + __vlan_flush(vg); + RCU_INIT_POINTER(port->vlgrp, NULL); + synchronize_rcu(); + __vlan_group_free(vg); } |