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authorJohannes Berg <johannes@sipsolutions.net>2009-08-07 16:17:38 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-08-14 09:13:43 -0400
commitf5ea9120be2e5d5c846243416cfdce01d02f5836 (patch)
treecade27e47a90dde79a523598b96a2ebb50770d2f /net/wireless/scan.c
parentf401a6f7ede753e56b84025e7d2db0d5ef560ce6 (diff)
nl80211: add generation number to all dumps
In order for userspace to be able to figure out whether it obtained a consistent snapshot of data or not when using netlink dumps, we need to have a generation number in each dump message that indicates whether the list has changed or not -- its value is arbitrary. This patch adds such a number to all dumps, this needs some mac80211 involvement to keep track of a generation number to start with when adding/removing mesh paths or stations. The wiphy and netdev lists can be fully handled within cfg80211, of course, but generation numbers need to be stored there as well. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/scan.c')
-rw-r--r--net/wireless/scan.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 0ccf3a07dc02..1bcb1312bd94 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -562,6 +562,7 @@ void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
spin_lock_bh(&dev->bss_lock);
list_del(&bss->list);
+ dev->bss_generation++;
rb_erase(&bss->rbn, &dev->bss_tree);
spin_unlock_bh(&dev->bss_lock);