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linux/net/mac80211/debugfs_netdev.c
Johannes Berg af6b63741c mac80211: generalise work handling 
In order to use auth/assoc for different purposes
other than MLME, it needs to be split up. For other
purposes, a generic work handling (potentially on
another channel) will be useful.

To achieve that, this patch moves much of the MLME
work handling out of mlme into a new work API. The
API can currently handle probing a specific AP,
authentication and association. The MLME previously
handled probe/authentication as one step and will
continue to do so, but they are separate in the new
work handling.

Work items are RCU-managed to be able to check for
existence of an item for a specific frame in the RX
path, but they can be re-used which the MLME right
now will do for its combined probe/auth step.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-12-28 16:54:55 -05:00

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/*
* 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/kernel.h>
#include <linux/device.h>
#include <linux/if.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <net/mac80211.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "rate.h"
#include "debugfs.h"
#include "debugfs_netdev.h"
static ssize_t ieee80211_if_read(
struct ieee80211_sub_if_data *sdata,
char __user *userbuf,
size_t count, loff_t *ppos,
ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
{
char buf[70];
ssize_t ret = -EINVAL;
read_lock(&dev_base_lock);
if (sdata->dev->reg_state == NETREG_REGISTERED)
ret = (*format)(sdata, buf, sizeof(buf));
read_unlock(&dev_base_lock);
if (ret != -EINVAL)
ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
return ret;
}
static ssize_t ieee80211_if_write(
struct ieee80211_sub_if_data *sdata,
const char __user *userbuf,
size_t count, loff_t *ppos,
ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
{
u8 *buf;
ssize_t ret = -ENODEV;
buf = kzalloc(count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, userbuf, count))
return -EFAULT;
rtnl_lock();
if (sdata->dev->reg_state == NETREG_REGISTERED)
ret = (*write)(sdata, buf, count);
rtnl_unlock();
return ret;
}
#define IEEE80211_IF_FMT(name, field, format_string) \
static ssize_t ieee80211_if_fmt_##name( \
const struct ieee80211_sub_if_data *sdata, char *buf, \
int buflen) \
{ \
return scnprintf(buf, buflen, format_string, sdata->field); \
}
#define IEEE80211_IF_FMT_DEC(name, field) \
IEEE80211_IF_FMT(name, field, "%d\n")
#define IEEE80211_IF_FMT_HEX(name, field) \
IEEE80211_IF_FMT(name, field, "%#x\n")
#define IEEE80211_IF_FMT_SIZE(name, field) \
IEEE80211_IF_FMT(name, field, "%zd\n")
#define IEEE80211_IF_FMT_ATOMIC(name, field) \
static ssize_t ieee80211_if_fmt_##name( \
const struct ieee80211_sub_if_data *sdata, \
char *buf, int buflen) \
{ \
return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
}
#define IEEE80211_IF_FMT_MAC(name, field) \
static ssize_t ieee80211_if_fmt_##name( \
const struct ieee80211_sub_if_data *sdata, char *buf, \
int buflen) \
{ \
return scnprintf(buf, buflen, "%pM\n", sdata->field); \
}
#define __IEEE80211_IF_FILE(name, _write) \
static ssize_t ieee80211_if_read_##name(struct file *file, \
char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
return ieee80211_if_read(file->private_data, \
userbuf, count, ppos, \
ieee80211_if_fmt_##name); \
} \
static const struct file_operations name##_ops = { \
.read = ieee80211_if_read_##name, \
.write = (_write), \
.open = mac80211_open_file_generic, \
}
#define __IEEE80211_IF_FILE_W(name) \
static ssize_t ieee80211_if_write_##name(struct file *file, \
const char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
return ieee80211_if_write(file->private_data, userbuf, count, \
ppos, ieee80211_if_parse_##name); \
} \
__IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
#define IEEE80211_IF_FILE(name, field, format) \
IEEE80211_IF_FMT_##format(name, field) \
__IEEE80211_IF_FILE(name, NULL)
/* common attributes */
IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
/* STA attributes */
IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
enum ieee80211_smps_mode smps_mode)
{
struct ieee80211_local *local = sdata->local;
int err;
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
smps_mode == IEEE80211_SMPS_STATIC)
return -EINVAL;
/* auto should be dynamic if in PS mode */
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
(smps_mode == IEEE80211_SMPS_DYNAMIC ||
smps_mode == IEEE80211_SMPS_AUTOMATIC))
return -EINVAL;
/* supported only on managed interfaces for now */
if (sdata->vif.type != NL80211_IFTYPE_STATION)
return -EOPNOTSUPP;
mutex_lock(&local->iflist_mtx);
err = __ieee80211_request_smps(sdata, smps_mode);
mutex_unlock(&local->iflist_mtx);
return err;
}
static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
[IEEE80211_SMPS_AUTOMATIC] = "auto",
[IEEE80211_SMPS_OFF] = "off",
[IEEE80211_SMPS_STATIC] = "static",
[IEEE80211_SMPS_DYNAMIC] = "dynamic",
};
static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
char *buf, int buflen)
{
if (sdata->vif.type != NL80211_IFTYPE_STATION)
return -EOPNOTSUPP;
return snprintf(buf, buflen, "request: %s\nused: %s\n",
smps_modes[sdata->u.mgd.req_smps],
smps_modes[sdata->u.mgd.ap_smps]);
}
static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
const char *buf, int buflen)
{
enum ieee80211_smps_mode mode;
for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
if (strncmp(buf, smps_modes[mode], buflen) == 0) {
int err = ieee80211_set_smps(sdata, mode);
if (!err)
return buflen;
return err;
}
}
return -EINVAL;
}
__IEEE80211_IF_FILE_W(smps);
/* AP attributes */
IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
static ssize_t ieee80211_if_fmt_num_buffered_multicast(
const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
{
return scnprintf(buf, buflen, "%u\n",
skb_queue_len(&sdata->u.ap.ps_bc_buf));
}
__IEEE80211_IF_FILE(num_buffered_multicast, NULL);
/* WDS attributes */
IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
#ifdef CONFIG_MAC80211_MESH
/* Mesh stats attributes */
IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
IEEE80211_IF_FILE(dropped_frames_no_route,
u.mesh.mshstats.dropped_frames_no_route, DEC);
IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
/* Mesh parameters */
IEEE80211_IF_FILE(dot11MeshMaxRetries,
u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
IEEE80211_IF_FILE(dot11MeshRetryTimeout,
u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
IEEE80211_IF_FILE(path_refresh_time,
u.mesh.mshcfg.path_refresh_time, DEC);
IEEE80211_IF_FILE(min_discovery_timeout,
u.mesh.mshcfg.min_discovery_timeout, DEC);
IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
#endif
#define DEBUGFS_ADD(name, type) \
debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
sdata, &name##_ops);
#define DEBUGFS_ADD_MODE(name, mode) \
debugfs_create_file(#name, mode, sdata->debugfs.dir, \
sdata, &name##_ops);
static void add_sta_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, sta);
DEBUGFS_ADD(force_unicast_rateidx, sta);
DEBUGFS_ADD(max_ratectrl_rateidx, sta);
DEBUGFS_ADD(bssid, sta);
DEBUGFS_ADD(aid, sta);
DEBUGFS_ADD_MODE(smps, 0600);
}
static void add_ap_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, ap);
DEBUGFS_ADD(force_unicast_rateidx, ap);
DEBUGFS_ADD(max_ratectrl_rateidx, ap);
DEBUGFS_ADD(num_sta_ps, ap);
DEBUGFS_ADD(dtim_count, ap);
DEBUGFS_ADD(num_buffered_multicast, ap);
}
static void add_wds_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, wds);
DEBUGFS_ADD(force_unicast_rateidx, wds);
DEBUGFS_ADD(max_ratectrl_rateidx, wds);
DEBUGFS_ADD(peer, wds);
}
static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, vlan);
DEBUGFS_ADD(force_unicast_rateidx, vlan);
DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
}
static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
{
}
#ifdef CONFIG_MAC80211_MESH
static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
{
struct dentry *dir = debugfs_create_dir("mesh_stats",
sdata->debugfs.dir);
#define MESHSTATS_ADD(name)\
debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
MESHSTATS_ADD(fwded_mcast);
MESHSTATS_ADD(fwded_unicast);
MESHSTATS_ADD(fwded_frames);
MESHSTATS_ADD(dropped_frames_ttl);
MESHSTATS_ADD(dropped_frames_no_route);
MESHSTATS_ADD(estab_plinks);
#undef MESHSTATS_ADD
}
static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
{
struct dentry *dir = debugfs_create_dir("mesh_config",
sdata->debugfs.dir);
#define MESHPARAMS_ADD(name) \
debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
MESHPARAMS_ADD(dot11MeshMaxRetries);
MESHPARAMS_ADD(dot11MeshRetryTimeout);
MESHPARAMS_ADD(dot11MeshConfirmTimeout);
MESHPARAMS_ADD(dot11MeshHoldingTimeout);
MESHPARAMS_ADD(dot11MeshTTL);
MESHPARAMS_ADD(auto_open_plinks);
MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
MESHPARAMS_ADD(path_refresh_time);
MESHPARAMS_ADD(min_discovery_timeout);
#undef MESHPARAMS_ADD
}
#endif
static void add_files(struct ieee80211_sub_if_data *sdata)
{
if (!sdata->debugfs.dir)
return;
switch (sdata->vif.type) {
case NL80211_IFTYPE_MESH_POINT:
#ifdef CONFIG_MAC80211_MESH
add_mesh_stats(sdata);
add_mesh_config(sdata);
#endif
break;
case NL80211_IFTYPE_STATION:
add_sta_files(sdata);
break;
case NL80211_IFTYPE_ADHOC:
/* XXX */
break;
case NL80211_IFTYPE_AP:
add_ap_files(sdata);
break;
case NL80211_IFTYPE_WDS:
add_wds_files(sdata);
break;
case NL80211_IFTYPE_MONITOR:
add_monitor_files(sdata);
break;
case NL80211_IFTYPE_AP_VLAN:
add_vlan_files(sdata);
break;
default:
break;
}
}
void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
{
char buf[10+IFNAMSIZ];
sprintf(buf, "netdev:%s", sdata->name);
sdata->debugfs.dir = debugfs_create_dir(buf,
sdata->local->hw.wiphy->debugfsdir);
add_files(sdata);
}
void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
{
if (!sdata->debugfs.dir)
return;
debugfs_remove_recursive(sdata->debugfs.dir);
sdata->debugfs.dir = NULL;
}
void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
{
struct dentry *dir;
char buf[10 + IFNAMSIZ];
dir = sdata->debugfs.dir;
if (!dir)
return;
sprintf(buf, "netdev:%s", sdata->name);
if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
"dir to %s\n", buf);
}
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