From: Julan Hsu <[email protected]> Expose path change count to destination in mpath info
Signed-off-by: Julan Hsu <[email protected]> --- include/net/cfg80211.h | 5 ++++- include/uapi/linux/nl80211.h | 4 +++- net/mac80211/cfg.c | 4 +++- net/mac80211/mesh.h | 2 ++ net/mac80211/mesh_hwmp.c | 4 ++++ net/wireless/nl80211.c | 5 ++++- 6 files changed, 20 insertions(+), 4 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 6be50a550a13..4e5fb1daf0a1 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1427,7 +1427,8 @@ enum mpath_info_flags { MPATH_INFO_DISCOVERY_TIMEOUT = BIT(4), MPATH_INFO_DISCOVERY_RETRIES = BIT(5), MPATH_INFO_FLAGS = BIT(6), - MPATH_INFO_HOP_COUNT = BIT(7) + MPATH_INFO_HOP_COUNT = BIT(7), + MPATH_INFO_PATH_CHANGE = BIT(8) }; /** @@ -1448,6 +1449,7 @@ enum mpath_info_flags { * changes, i.e. when a station is added or removed, so that * userspace can tell whether it got a consistent snapshot. * @hop_count: hops to destination + * @path_change_count: total number of path changes to destination */ struct mpath_info { u32 filled; @@ -1459,6 +1461,7 @@ struct mpath_info { u8 discovery_retries; u8 flags; u8 hop_count; + u32 path_change_count; int generation; }; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index fcfca197be59..1e24d236f675 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -3226,8 +3226,9 @@ enum nl80211_mpath_flags { * @NL80211_MPATH_INFO_DISCOVERY_TIMEOUT: total path discovery timeout, in msec * @NL80211_MPATH_INFO_DISCOVERY_RETRIES: mesh path discovery retries * @NL80211_MPATH_INFO_HOP_COUNT: hop count to destination + * @NL80211_MPATH_INFO_PATH_CHANGE: total number of path changes to destination * @NL80211_MPATH_INFO_MAX: highest mesh path information attribute number - * currently defind + * currently defined * @__NL80211_MPATH_INFO_AFTER_LAST: internal use */ enum nl80211_mpath_info { @@ -3240,6 +3241,7 @@ enum nl80211_mpath_info { NL80211_MPATH_INFO_DISCOVERY_TIMEOUT, NL80211_MPATH_INFO_DISCOVERY_RETRIES, NL80211_MPATH_INFO_HOP_COUNT, + NL80211_MPATH_INFO_PATH_CHANGE, /* keep last */ __NL80211_MPATH_INFO_AFTER_LAST, diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 8e756ac076ad..aba2f6cbdc4f 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1743,7 +1743,8 @@ static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop, MPATH_INFO_DISCOVERY_TIMEOUT | MPATH_INFO_DISCOVERY_RETRIES | MPATH_INFO_FLAGS | - MPATH_INFO_HOP_COUNT; + MPATH_INFO_HOP_COUNT | + MPATH_INFO_PATH_CHANGE; pinfo->frame_qlen = mpath->frame_queue.qlen; pinfo->sn = mpath->sn; @@ -1764,6 +1765,7 @@ static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop, if (mpath->flags & MESH_PATH_RESOLVED) pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED; pinfo->hop_count = mpath->hop_count; + pinfo->path_change_count = mpath->path_change_count; } static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev, diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index 21526630bf65..dbb43e9454e0 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -94,6 +94,7 @@ enum mesh_deferred_task_flags { * @last_preq_to_root: Timestamp of last PREQ sent to root * @is_root: the destination station of this path is a root node * @is_gate: the destination station of this path is a mesh gate + * @path_change_count: the number of path changes to destination * * * The dst address is unique in the mesh path table. Since the mesh_path is @@ -124,6 +125,7 @@ struct mesh_path { unsigned long last_preq_to_root; bool is_root; bool is_gate; + u32 path_change_count; }; /** diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index 6d1190b3332f..a0aebf44493f 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -479,6 +479,8 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata, } if (fresh_info) { + if (rcu_access_pointer(mpath->next_hop) != sta) + mpath->path_change_count++; mesh_path_assign_nexthop(mpath, sta); mpath->flags |= MESH_PATH_SN_VALID; mpath->metric = new_metric; @@ -523,6 +525,8 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata, } if (fresh_info) { + if (rcu_access_pointer(mpath->next_hop) != sta) + mpath->path_change_count++; mesh_path_assign_nexthop(mpath, sta); mpath->metric = last_hop_metric; mpath->exp_time = time_after(mpath->exp_time, exp_time) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 442c02415aed..3fde570f1cf3 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5644,7 +5644,10 @@ static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq, pinfo->discovery_retries)) || ((pinfo->filled & MPATH_INFO_HOP_COUNT) && nla_put_u8(msg, NL80211_MPATH_INFO_HOP_COUNT, - pinfo->hop_count))) + pinfo->hop_count)) || + ((pinfo->filled & MPATH_INFO_PATH_CHANGE) && + nla_put_u32(msg, NL80211_MPATH_INFO_PATH_CHANGE, + pinfo->path_change_count))) goto nla_put_failure; nla_nest_end(msg, pinfoattr); -- 2.20.1.97.g81188d93c3-goog
