Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754973Ab3EJOof (ORCPT ); Fri, 10 May 2013 10:44:35 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:57035 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754088Ab3EJOUm (ORCPT ); Fri, 10 May 2013 10:20:42 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Vlad Yasevich" , "David S. Miller" Date: Fri, 10 May 2013 14:39:41 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [087/118] net: count hw_addr syncs so that unsync works properly. In-Reply-To: X-SA-Exim-Connect-IP: 2001:470:1f08:1539:d51a:8785:aa0a:cebe X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2365 Lines: 75 3.2.45-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Vlad Yasevich [ Upstream commit 4543fbefe6e06a9e40d9f2b28d688393a299f079 ] A few drivers use dev_uc_sync/unsync to synchronize the address lists from master down to slave/lower devices. In some cases (bond/team) a single address list is synched down to multiple devices. At the time of unsync, we have a leak in these lower devices, because "synced" is treated as a boolean and the address will not be unsynced for anything after the first device/call. Treat "synced" as a count (same as refcount) and allow all unsync calls to work. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller Signed-off-by: Ben Hutchings --- include/linux/netdevice.h | 2 +- net/core/dev_addr_lists.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -225,9 +225,9 @@ struct netdev_hw_addr { #define NETDEV_HW_ADDR_T_SLAVE 3 #define NETDEV_HW_ADDR_T_UNICAST 4 #define NETDEV_HW_ADDR_T_MULTICAST 5 - bool synced; bool global_use; int refcount; + int synced; struct rcu_head rcu_head; }; --- a/net/core/dev_addr_lists.c +++ b/net/core/dev_addr_lists.c @@ -57,7 +57,7 @@ static int __hw_addr_add_ex(struct netde ha->type = addr_type; ha->refcount = 1; ha->global_use = global; - ha->synced = false; + ha->synced = 0; list_add_tail_rcu(&ha->list, &list->list); list->count++; return 0; @@ -155,7 +155,7 @@ int __hw_addr_sync(struct netdev_hw_addr addr_len, ha->type); if (err) break; - ha->synced = true; + ha->synced++; ha->refcount++; } else if (ha->refcount == 1) { __hw_addr_del(to_list, ha->addr, addr_len, ha->type); @@ -176,7 +176,7 @@ void __hw_addr_unsync(struct netdev_hw_a if (ha->synced) { __hw_addr_del(to_list, ha->addr, addr_len, ha->type); - ha->synced = false; + ha->synced--; __hw_addr_del(from_list, ha->addr, addr_len, ha->type); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/