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Commit 24736701 authored by John W. Linville's avatar John W. Linville
Browse files

Revert "mac80211: use a struct for bss->mesh_config" 



This reverts commit 6c4711b4.

That patch breaks mesh config comparison between beacons/probe reponses, so
every beacon from a mesh network would be added as a new bss. Since the
comparison has to be performed for every received beacon I believe it is best to
save the mesh config in a format easy to compare, rather than do a bunch of
unaligned accesses to compare field by field.

Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 8eefca48

net/mac80211/ieee80211_i.h

+2 −11
Original line number Diff line number Diff line
@@ -69,14 +69,6 @@ struct ieee80211_fragment_entry { 
	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */

};



struct bss_mesh_config {

	u32 path_proto_id;

	u32 path_metric_id;

	u32 cong_control_id;

	u32 channel_precedence;

	u8 mesh_version;

};





struct ieee80211_sta_bss {

	struct list_head list;
@@ -102,7 +94,7 @@ struct ieee80211_sta_bss { 
#ifdef CONFIG_MAC80211_MESH

	u8 *mesh_id;

	size_t mesh_id_len;

	struct bss_mesh_config *mesh_cfg;

	u8 *mesh_cfg;

#endif

#define IEEE80211_MAX_SUPP_RATES 32

	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
@@ -121,8 +113,7 @@ struct ieee80211_sta_bss { 
	u8 erp_value;

};



static inline

struct bss_mesh_config *bss_mesh_cfg(struct ieee80211_sta_bss *bss)

static inline u8 *bss_mesh_cfg(struct ieee80211_sta_bss *bss)

{

#ifdef CONFIG_MAC80211_MESH

	return bss->mesh_cfg;

net/mac80211/ieee80211_sta.c

+12 −20
Original line number Diff line number Diff line
@@ -27,7 +27,6 @@ 
#include <linux/rtnetlink.h>

#include <net/iw_handler.h>

#include <asm/types.h>

#include <asm/unaligned.h>



#include <net/mac80211.h>

#include "ieee80211_i.h"
@@ -2123,11 +2122,6 @@ ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq, 
}



#ifdef CONFIG_MAC80211_MESH

static inline u32 bss_mesh_cfg_get(u8 *mesh_cfg, u8 offset)

{

	return be32_to_cpu(get_unaligned((__be32 *) (mesh_cfg + offset)));

}



static struct ieee80211_sta_bss *

ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,

			  u8 *mesh_cfg, int freq)
@@ -2167,7 +2161,7 @@ ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len, 
	if (!bss)

		return NULL;



	bss->mesh_cfg = kmalloc(sizeof(struct bss_mesh_config), GFP_ATOMIC);

	bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);

	if (!bss->mesh_cfg) {

		kfree(bss);

		return NULL;
@@ -2185,12 +2179,7 @@ ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len, 


	atomic_inc(&bss->users);

	atomic_inc(&bss->users);

	bss->mesh_cfg->mesh_version = mesh_cfg[0];

	bss->mesh_cfg->path_proto_id = bss_mesh_cfg_get(mesh_cfg, PP_OFFSET);

	bss->mesh_cfg->path_metric_id = bss_mesh_cfg_get(mesh_cfg, PM_OFFSET);

	bss->mesh_cfg->cong_control_id = bss_mesh_cfg_get(mesh_cfg, CC_OFFSET);

	bss->mesh_cfg->channel_precedence = bss_mesh_cfg_get(mesh_cfg,

							     CP_OFFSET);

	memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);

	bss->mesh_id_len = mesh_id_len;

	bss->freq = freq;

	spin_lock_bh(&local->sta_bss_lock);
@@ -4067,33 +4056,36 @@ ieee80211_sta_scan_result(struct net_device *dev, 


	if (bss_mesh_cfg(bss)) {

		char *buf;

		struct bss_mesh_config *cfg = bss_mesh_cfg(bss);

		u8 *cfg = bss_mesh_cfg(bss);

		buf = kmalloc(50, GFP_ATOMIC);

		if (buf) {

			memset(&iwe, 0, sizeof(iwe));

			iwe.cmd = IWEVCUSTOM;

			sprintf(buf, "Mesh network (version %d)",

				cfg->mesh_version);

			sprintf(buf, "Mesh network (version %d)", cfg[0]);

			iwe.u.data.length = strlen(buf);

			current_ev = iwe_stream_add_point(current_ev, end_buf,

							  &iwe, buf);

			sprintf(buf, "Path Selection Protocol ID: "

				"0x%08X", cfg->path_proto_id);

				"0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],

							cfg[4]);

			iwe.u.data.length = strlen(buf);

			current_ev = iwe_stream_add_point(current_ev, end_buf,

							  &iwe, buf);

			sprintf(buf, "Path Selection Metric ID: "

				"0x%08X", cfg->path_metric_id);

				"0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],

							cfg[8]);

			iwe.u.data.length = strlen(buf);

			current_ev = iwe_stream_add_point(current_ev, end_buf,

							  &iwe, buf);

			sprintf(buf, "Congestion Control Mode ID: "

				"0x%08X", cfg->cong_control_id);

				"0x%02X%02X%02X%02X", cfg[9], cfg[10],

							cfg[11], cfg[12]);

			iwe.u.data.length = strlen(buf);

			current_ev = iwe_stream_add_point(current_ev, end_buf,

							  &iwe, buf);

			sprintf(buf, "Channel Precedence: "

				"0x%08X", cfg->channel_precedence);

				"0x%02X%02X%02X%02X", cfg[13], cfg[14],

							cfg[15], cfg[16]);

			iwe.u.data.length = strlen(buf);

			current_ev = iwe_stream_add_point(current_ev, end_buf,

							  &iwe, buf);

net/mac80211/mesh.c

+4 −0
Original line number Diff line number Diff line
@@ -11,6 +11,10 @@ 
#include "ieee80211_i.h"

#include "mesh.h"



#define PP_OFFSET 	1		/* Path Selection Protocol */

#define PM_OFFSET	5		/* Path Selection Metric   */

#define CC_OFFSET	9		/* Congestion Control Mode */

#define CAPAB_OFFSET 17

#define ACCEPT_PLINKS 0x80



int mesh_allocated;

net/mac80211/mesh.h

+0 −10
Original line number Diff line number Diff line
@@ -157,16 +157,6 @@ struct mesh_rmc { 
 */

#define MESH_CFG_CMP_LEN 	17



/*

 * Components offset within the mesh configuration IE

 */

#define PP_OFFSET	1		/* Path Selection Protocol */

#define PM_OFFSET	5		/* Path Selection Metric   */

#define CC_OFFSET	9		/* Congestion Control Mode */

#define CP_OFFSET	13		/* Channel Precedence */

#define CAPAB_OFFSET	17		/* Mesh Capabilities */





/* Default values, timeouts in ms */

#define MESH_TTL 		5

#define MESH_MAX_RETR	 	3