linux/net/mac80211/debugfs_key.c
Johannes Berg 17741cdc26 mac80211: share STA information with driver
This patch changes mac80211 to share some more data about
stations with drivers. Should help iwlwifi and ath9k when
 they get around to updating, and might also help with
implementing rate control algorithms without internals.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-09-15 16:48:23 -04:00

291 lines
7.2 KiB
C

/*
* Copyright 2003-2005 Devicescape Software, Inc.
* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kobject.h>
#include "ieee80211_i.h"
#include "key.h"
#include "debugfs.h"
#include "debugfs_key.h"
#define KEY_READ(name, prop, buflen, format_string) \
static ssize_t key_##name##_read(struct file *file, \
char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
char buf[buflen]; \
struct ieee80211_key *key = file->private_data; \
int res = scnprintf(buf, buflen, format_string, key->prop); \
return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
}
#define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n")
#define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n")
#define KEY_OPS(name) \
static const struct file_operations key_ ##name## _ops = { \
.read = key_##name##_read, \
.open = mac80211_open_file_generic, \
}
#define KEY_FILE(name, format) \
KEY_READ_##format(name) \
KEY_OPS(name)
#define KEY_CONF_READ(name, buflen, format_string) \
KEY_READ(conf_##name, conf.name, buflen, format_string)
#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n")
#define KEY_CONF_OPS(name) \
static const struct file_operations key_ ##name## _ops = { \
.read = key_conf_##name##_read, \
.open = mac80211_open_file_generic, \
}
#define KEY_CONF_FILE(name, format) \
KEY_CONF_READ_##format(name) \
KEY_CONF_OPS(name)
KEY_CONF_FILE(keylen, D);
KEY_CONF_FILE(keyidx, D);
KEY_CONF_FILE(hw_key_idx, D);
KEY_FILE(flags, X);
KEY_FILE(tx_rx_count, D);
KEY_READ(ifindex, sdata->dev->ifindex, 20, "%d\n");
KEY_OPS(ifindex);
static ssize_t key_algorithm_read(struct file *file,
char __user *userbuf,
size_t count, loff_t *ppos)
{
char *alg;
struct ieee80211_key *key = file->private_data;
switch (key->conf.alg) {
case ALG_WEP:
alg = "WEP\n";
break;
case ALG_TKIP:
alg = "TKIP\n";
break;
case ALG_CCMP:
alg = "CCMP\n";
break;
default:
return 0;
}
return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
}
KEY_OPS(algorithm);
static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
const u8 *tpn;
char buf[20];
int len;
struct ieee80211_key *key = file->private_data;
switch (key->conf.alg) {
case ALG_WEP:
len = scnprintf(buf, sizeof(buf), "\n");
break;
case ALG_TKIP:
len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
key->u.tkip.tx.iv32,
key->u.tkip.tx.iv16);
break;
case ALG_CCMP:
tpn = key->u.ccmp.tx_pn;
len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
break;
default:
return 0;
}
return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(tx_spec);
static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct ieee80211_key *key = file->private_data;
char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
int i, len;
const u8 *rpn;
switch (key->conf.alg) {
case ALG_WEP:
len = scnprintf(buf, sizeof(buf), "\n");
break;
case ALG_TKIP:
for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
p += scnprintf(p, sizeof(buf)+buf-p,
"%08x %04x\n",
key->u.tkip.rx[i].iv32,
key->u.tkip.rx[i].iv16);
len = p - buf;
break;
case ALG_CCMP:
for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
rpn = key->u.ccmp.rx_pn[i];
p += scnprintf(p, sizeof(buf)+buf-p,
"%02x%02x%02x%02x%02x%02x\n",
rpn[0], rpn[1], rpn[2],
rpn[3], rpn[4], rpn[5]);
}
len = p - buf;
break;
default:
return 0;
}
return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(rx_spec);
static ssize_t key_replays_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct ieee80211_key *key = file->private_data;
char buf[20];
int len;
if (key->conf.alg != ALG_CCMP)
return 0;
len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(replays);
static ssize_t key_key_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct ieee80211_key *key = file->private_data;
int i, res, bufsize = 2 * key->conf.keylen + 2;
char *buf = kmalloc(bufsize, GFP_KERNEL);
char *p = buf;
for (i = 0; i < key->conf.keylen; i++)
p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
p += scnprintf(p, bufsize+buf-p, "\n");
res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
kfree(buf);
return res;
}
KEY_OPS(key);
#define DEBUGFS_ADD(name) \
key->debugfs.name = debugfs_create_file(#name, 0400,\
key->debugfs.dir, key, &key_##name##_ops);
void ieee80211_debugfs_key_add(struct ieee80211_key *key)
{
static int keycount;
char buf[50];
DECLARE_MAC_BUF(mac);
struct sta_info *sta;
if (!key->local->debugfs.keys)
return;
sprintf(buf, "%d", keycount);
key->debugfs.cnt = keycount;
keycount++;
key->debugfs.dir = debugfs_create_dir(buf,
key->local->debugfs.keys);
if (!key->debugfs.dir)
return;
rcu_read_lock();
sta = rcu_dereference(key->sta);
if (sta)
sprintf(buf, "../../stations/%s",
print_mac(mac, sta->sta.addr));
rcu_read_unlock();
/* using sta as a boolean is fine outside RCU lock */
if (sta)
key->debugfs.stalink =
debugfs_create_symlink("station", key->debugfs.dir, buf);
DEBUGFS_ADD(keylen);
DEBUGFS_ADD(flags);
DEBUGFS_ADD(keyidx);
DEBUGFS_ADD(hw_key_idx);
DEBUGFS_ADD(tx_rx_count);
DEBUGFS_ADD(algorithm);
DEBUGFS_ADD(tx_spec);
DEBUGFS_ADD(rx_spec);
DEBUGFS_ADD(replays);
DEBUGFS_ADD(key);
DEBUGFS_ADD(ifindex);
};
#define DEBUGFS_DEL(name) \
debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
{
if (!key)
return;
DEBUGFS_DEL(keylen);
DEBUGFS_DEL(flags);
DEBUGFS_DEL(keyidx);
DEBUGFS_DEL(hw_key_idx);
DEBUGFS_DEL(tx_rx_count);
DEBUGFS_DEL(algorithm);
DEBUGFS_DEL(tx_spec);
DEBUGFS_DEL(rx_spec);
DEBUGFS_DEL(replays);
DEBUGFS_DEL(key);
DEBUGFS_DEL(ifindex);
debugfs_remove(key->debugfs.stalink);
key->debugfs.stalink = NULL;
debugfs_remove(key->debugfs.dir);
key->debugfs.dir = NULL;
}
void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
{
char buf[50];
struct ieee80211_key *key;
if (!sdata->debugfsdir)
return;
/* this is running under the key lock */
key = sdata->default_key;
if (key) {
sprintf(buf, "../keys/%d", key->debugfs.cnt);
sdata->common_debugfs.default_key =
debugfs_create_symlink("default_key",
sdata->debugfsdir, buf);
} else
ieee80211_debugfs_key_remove_default(sdata);
}
void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
{
if (!sdata)
return;
debugfs_remove(sdata->common_debugfs.default_key);
sdata->common_debugfs.default_key = NULL;
}
void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
struct sta_info *sta)
{
debugfs_remove(key->debugfs.stalink);
key->debugfs.stalink = NULL;
}