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Commit cc241636 authored by Julan Hsu's avatar Julan Hsu Committed by Johannes Berg
Browse files

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



Expose hop count to destination information in mpath info

Signed-off-by: default avatarJulan Hsu <julanhsu@google.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent d9bb4108

include/net/cfg80211.h

+4 −0
Original line number Diff line number Diff line
@@ -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;

};

include/uapi/linux/nl80211.h

+2 −0
Original line number Diff line number Diff line
@@ -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,

net/mac80211/cfg.c

+3 −1
Original line number Diff line number Diff line
@@ -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,

net/mac80211/mesh_hwmp.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

net/wireless/nl80211.c

+4 −1
Original line number Diff line number Diff line
@@ -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);