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nl80211/mac80211: mesh: add hop count to mpath info 

Expose hop count to destination information in mpath info

Signed-off-by: Julan Hsu <julanhsu@google.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Julan Hsu 2019-01-15 15:28:42 -08:00 committed by Johannes Berg
parent d9bb410888
commit cc24163690
5 changed files with 18 additions and 2 deletions
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4
include/net/cfg80211.h
View File

@ -1429,6 +1429,7 @@ enum monitor_flags {
* @MPATH_INFO_DISCOVERY_TIMEOUT: @discovery_timeout filled
* @MPATH_INFO_DISCOVERY_RETRIES: @discovery_retries filled
* @MPATH_INFO_FLAGS: @flags filled
* @MPATH_INFO_HOP_COUNT: @hop_count filled
*/
enum mpath_info_flags {
MPATH_INFO_FRAME_QLEN = BIT(0),
@ -1438,6 +1439,7 @@ 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)
};
/**
@ -1457,6 +1459,7 @@ enum mpath_info_flags {
* 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.
* @hop_count: hops to destination
*/
struct mpath_info {
u32 filled;
@ -1467,6 +1470,7 @@ struct mpath_info {
u32 discovery_timeout;
u8 discovery_retries;
u8 flags;
u8 hop_count;
int generation;
};

2
include/uapi/linux/nl80211.h
View File

@ -3287,6 +3287,7 @@ enum nl80211_mpath_flags {
* &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_MAX: highest mesh path information attribute number
* currently defind
* @__NL80211_MPATH_INFO_AFTER_LAST: internal use
@ -3300,6 +3301,7 @@ enum nl80211_mpath_info {
NL80211_MPATH_INFO_FLAGS,
NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
NL80211_MPATH_INFO_DISCOVERY_RETRIES,
NL80211_MPATH_INFO_HOP_COUNT,
/* keep last */
__NL80211_MPATH_INFO_AFTER_LAST,

4
net/mac80211/cfg.c
View File

@ -1745,7 +1745,8 @@ static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
MPATH_INFO_EXPTIME |
MPATH_INFO_DISCOVERY_TIMEOUT |
MPATH_INFO_DISCOVERY_RETRIES |
MPATH_INFO_FLAGS;
MPATH_INFO_FLAGS |
MPATH_INFO_HOP_COUNT;
pinfo->frame_qlen = mpath->frame_queue.qlen;
pinfo->sn = mpath->sn;
@ -1765,6 +1766,7 @@ static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
if (mpath->flags & MESH_PATH_RESOLVED)
pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
pinfo->hop_count = mpath->hop_count;
}
static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,

5
net/mac80211/mesh_hwmp.c
View File

@ -386,6 +386,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
unsigned long orig_lifetime, exp_time;
u32 last_hop_metric, new_metric;
bool process = true;
u8 hopcount;
rcu_read_lock();
sta = sta_info_get(sdata, mgmt->sa);
@ -404,6 +405,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
orig_sn = PREQ_IE_ORIG_SN(hwmp_ie);
orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie);
orig_metric = PREQ_IE_METRIC(hwmp_ie);
hopcount = PREQ_IE_HOPCOUNT(hwmp_ie) + 1;
break;
case MPATH_PREP:
/* Originator here refers to the MP that was the target in the
@ -415,6 +417,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
orig_sn = PREP_IE_TARGET_SN(hwmp_ie);
orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
orig_metric = PREP_IE_METRIC(hwmp_ie);
hopcount = PREP_IE_HOPCOUNT(hwmp_ie) + 1;
break;
default:
rcu_read_unlock();
@ -482,6 +485,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
mpath->sn = orig_sn;
mpath->exp_time = time_after(mpath->exp_time, exp_time)
? mpath->exp_time : exp_time;
mpath->hop_count = hopcount;
mesh_path_activate(mpath);
spin_unlock_bh(&mpath->state_lock);
ewma_mesh_fail_avg_init(&sta->mesh->fail_avg);
@ -523,6 +527,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
mpath->metric = last_hop_metric;
mpath->exp_time = time_after(mpath->exp_time, exp_time)
? mpath->exp_time : exp_time;
mpath->hop_count = 1;
mesh_path_activate(mpath);
spin_unlock_bh(&mpath->state_lock);
ewma_mesh_fail_avg_init(&sta->mesh->fail_avg);

5
net/wireless/nl80211.c
View File

@ -5827,7 +5827,10 @@ static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
pinfo->discovery_timeout)) ||
((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
pinfo->discovery_retries)))
pinfo->discovery_retries)) ||
((pinfo->filled & MPATH_INFO_HOP_COUNT) &&
nla_put_u8(msg, NL80211_MPATH_INFO_HOP_COUNT,
pinfo->hop_count)))
goto nla_put_failure;
nla_nest_end(msg, pinfoattr);