diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-08-07 16:17:38 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-08-14 15:13:43 +0200 |
| commit | f5ea9120be2e5d5c846243416cfdce01d02f5836 (patch) | |
| tree | cade27e47a90dde79a523598b96a2ebb50770d2f /include/net | |
| parent | cfg80211: use reassociation when possible (diff) | |
| download | linux-f5ea9120be2e5d5c846243416cfdce01d02f5836.tar.xz linux-f5ea9120be2e5d5c846243416cfdce01d02f5836.zip | |
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 'include/net')
| -rw-r--r-- | include/net/cfg80211.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 1ee30fcd6fdc..de7d116acc3d 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -372,6 +372,10 @@ struct rate_info { * @txrate: current unicast bitrate to this station * @rx_packets: packets received from this station * @tx_packets: packets transmitted to this station + * @generation: generation number for nl80211 dumps. + * This number should increase every time the list of stations + * changes, i.e. when a station is added or removed, so that + * userspace can tell whether it got a consistent snapshot. */ struct station_info { u32 filled; @@ -385,6 +389,8 @@ struct station_info { struct rate_info txrate; u32 rx_packets; u32 tx_packets; + + int generation; }; /** @@ -444,6 +450,10 @@ enum mpath_info_flags { * @flags: mesh path flags * @discovery_timeout: total mesh path discovery timeout, in msecs * @discovery_retries: mesh path discovery retries + * @generation: generation number for nl80211 dumps. + * This number should increase every time the list of mesh paths + * changes, i.e. when a station is added or removed, so that + * userspace can tell whether it got a consistent snapshot. */ struct mpath_info { u32 filled; @@ -454,6 +464,8 @@ struct mpath_info { u32 discovery_timeout; u8 discovery_retries; u8 flags; + + int generation; }; /** |