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linux/net/mac80211/debugfs.c
Johannes Berg 827b1fb44b mac80211: resume properly, add suspend/resume test 
When mac80211 resumes, it currently doesn't reconfigure the interfaces
entirely and also doesn't reconfigure BSS information -- fix this.

Also, to be able to test this, add a debugfs file that just calls
the suspend/resume code to see what happens when we go through that,
without needing the time-consuming suspend/resume cycle.

(Original version broke the build for CONFIG_PM=n.  Define alternative
functions for that situation. -- JWL)

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-03-27 20:13:03 -04:00

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/*
* mac80211 debugfs for wireless PHYs
*
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* GPLv2
*
*/
#include <linux/debugfs.h>
#include <linux/rtnetlink.h>
#include "ieee80211_i.h"
#include "rate.h"
#include "debugfs.h"
int mac80211_open_file_generic(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
static ssize_t name## _read(struct file *file, char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
struct ieee80211_local *local = file->private_data; \
char buf[buflen]; \
int res; \
\
res = scnprintf(buf, buflen, fmt "\n", ##value); \
return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
} \
\
static const struct file_operations name## _ops = { \
.read = name## _read, \
.open = mac80211_open_file_generic, \
};
#define DEBUGFS_ADD(name) \
local->debugfs.name = debugfs_create_file(#name, 0400, phyd, \
local, &name## _ops);
#define DEBUGFS_ADD_MODE(name, mode) \
local->debugfs.name = debugfs_create_file(#name, mode, phyd, \
local, &name## _ops);
#define DEBUGFS_DEL(name) \
debugfs_remove(local->debugfs.name); \
local->debugfs.name = NULL;
DEBUGFS_READONLY_FILE(frequency, 20, "%d",
local->hw.conf.channel->center_freq);
DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
local->rts_threshold);
DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
local->fragmentation_threshold);
DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
local->hw.conf.short_frame_max_tx_count);
DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
local->hw.conf.long_frame_max_tx_count);
DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
local->total_ps_buffered);
DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
local->wep_iv & 0xffffff);
DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
static ssize_t tsf_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ieee80211_local *local = file->private_data;
u64 tsf = 0;
char buf[100];
if (local->ops->get_tsf)
tsf = local->ops->get_tsf(local_to_hw(local));
snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
}
static ssize_t tsf_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ieee80211_local *local = file->private_data;
unsigned long long tsf;
char buf[100];
size_t len;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strncmp(buf, "reset", 5) == 0) {
if (local->ops->reset_tsf) {
local->ops->reset_tsf(local_to_hw(local));
printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
}
} else {
tsf = simple_strtoul(buf, NULL, 0);
if (local->ops->set_tsf) {
local->ops->set_tsf(local_to_hw(local), tsf);
printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
}
}
return count;
}
static const struct file_operations tsf_ops = {
.read = tsf_read,
.write = tsf_write,
.open = mac80211_open_file_generic
};
static ssize_t reset_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ieee80211_local *local = file->private_data;
rtnl_lock();
__ieee80211_suspend(&local->hw);
__ieee80211_resume(&local->hw);
rtnl_unlock();
return count;
}
static const struct file_operations reset_ops = {
.write = reset_write,
.open = mac80211_open_file_generic,
};
/* statistics stuff */
#define DEBUGFS_STATS_FILE(name, buflen, fmt, value...) \
DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
static ssize_t format_devstat_counter(struct ieee80211_local *local,
char __user *userbuf,
size_t count, loff_t *ppos,
int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
int buflen))
{
struct ieee80211_low_level_stats stats;
char buf[20];
int res;
if (!local->ops->get_stats)
return -EOPNOTSUPP;
rtnl_lock();
res = local->ops->get_stats(local_to_hw(local), &stats);
rtnl_unlock();
if (!res)
res = printvalue(&stats, buf, sizeof(buf));
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
#define DEBUGFS_DEVSTATS_FILE(name) \
static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
char *buf, int buflen) \
{ \
return scnprintf(buf, buflen, "%u\n", stats->name); \
} \
static ssize_t stats_ ##name## _read(struct file *file, \
char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
return format_devstat_counter(file->private_data, \
userbuf, \
count, \
ppos, \
print_devstats_##name); \
} \
\
static const struct file_operations stats_ ##name## _ops = { \
.read = stats_ ##name## _read, \
.open = mac80211_open_file_generic, \
};
#define DEBUGFS_STATS_ADD(name) \
local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
local, &stats_ ##name## _ops);
#define DEBUGFS_STATS_DEL(name) \
debugfs_remove(local->debugfs.stats.name); \
local->debugfs.stats.name = NULL;
DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
local->dot11TransmittedFragmentCount);
DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
local->dot11MulticastTransmittedFrameCount);
DEBUGFS_STATS_FILE(failed_count, 20, "%u",
local->dot11FailedCount);
DEBUGFS_STATS_FILE(retry_count, 20, "%u",
local->dot11RetryCount);
DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
local->dot11MultipleRetryCount);
DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
local->dot11FrameDuplicateCount);
DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
local->dot11ReceivedFragmentCount);
DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
local->dot11MulticastReceivedFrameCount);
DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
local->dot11TransmittedFrameCount);
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
local->tx_handlers_drop);
DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
local->tx_handlers_queued);
DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
local->tx_handlers_drop_unencrypted);
DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
local->tx_handlers_drop_fragment);
DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
local->tx_handlers_drop_wep);
DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
local->tx_handlers_drop_not_assoc);
DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
local->tx_handlers_drop_unauth_port);
DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
local->rx_handlers_drop);
DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
local->rx_handlers_queued);
DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
local->rx_handlers_drop_nullfunc);
DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
local->rx_handlers_drop_defrag);
DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
local->rx_handlers_drop_short);
DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
local->rx_handlers_drop_passive_scan);
DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
local->tx_expand_skb_head);
DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
local->tx_expand_skb_head_cloned);
DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
local->rx_expand_skb_head);
DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
local->rx_expand_skb_head2);
DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
local->rx_handlers_fragments);
DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
local->tx_status_drop);
#endif
DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
void debugfs_hw_add(struct ieee80211_local *local)
{
struct dentry *phyd = local->hw.wiphy->debugfsdir;
struct dentry *statsd;
if (!phyd)
return;
local->debugfs.stations = debugfs_create_dir("stations", phyd);
local->debugfs.keys = debugfs_create_dir("keys", phyd);
DEBUGFS_ADD(frequency);
DEBUGFS_ADD(rts_threshold);
DEBUGFS_ADD(fragmentation_threshold);
DEBUGFS_ADD(short_retry_limit);
DEBUGFS_ADD(long_retry_limit);
DEBUGFS_ADD(total_ps_buffered);
DEBUGFS_ADD(wep_iv);
DEBUGFS_ADD(tsf);
DEBUGFS_ADD_MODE(reset, 0200);
statsd = debugfs_create_dir("statistics", phyd);
local->debugfs.statistics = statsd;
/* if the dir failed, don't put all the other things into the root! */
if (!statsd)
return;
DEBUGFS_STATS_ADD(transmitted_fragment_count);
DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
DEBUGFS_STATS_ADD(failed_count);
DEBUGFS_STATS_ADD(retry_count);
DEBUGFS_STATS_ADD(multiple_retry_count);
DEBUGFS_STATS_ADD(frame_duplicate_count);
DEBUGFS_STATS_ADD(received_fragment_count);
DEBUGFS_STATS_ADD(multicast_received_frame_count);
DEBUGFS_STATS_ADD(transmitted_frame_count);
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
DEBUGFS_STATS_ADD(tx_handlers_drop);
DEBUGFS_STATS_ADD(tx_handlers_queued);
DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
DEBUGFS_STATS_ADD(rx_handlers_drop);
DEBUGFS_STATS_ADD(rx_handlers_queued);
DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
DEBUGFS_STATS_ADD(rx_handlers_drop_short);
DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
DEBUGFS_STATS_ADD(tx_expand_skb_head);
DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
DEBUGFS_STATS_ADD(rx_expand_skb_head);
DEBUGFS_STATS_ADD(rx_expand_skb_head2);
DEBUGFS_STATS_ADD(rx_handlers_fragments);
DEBUGFS_STATS_ADD(tx_status_drop);
#endif
DEBUGFS_STATS_ADD(dot11ACKFailureCount);
DEBUGFS_STATS_ADD(dot11RTSFailureCount);
DEBUGFS_STATS_ADD(dot11FCSErrorCount);
DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
}
void debugfs_hw_del(struct ieee80211_local *local)
{
DEBUGFS_DEL(frequency);
DEBUGFS_DEL(rts_threshold);
DEBUGFS_DEL(fragmentation_threshold);
DEBUGFS_DEL(short_retry_limit);
DEBUGFS_DEL(long_retry_limit);
DEBUGFS_DEL(total_ps_buffered);
DEBUGFS_DEL(wep_iv);
DEBUGFS_DEL(tsf);
DEBUGFS_DEL(reset);
DEBUGFS_STATS_DEL(transmitted_fragment_count);
DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
DEBUGFS_STATS_DEL(failed_count);
DEBUGFS_STATS_DEL(retry_count);
DEBUGFS_STATS_DEL(multiple_retry_count);
DEBUGFS_STATS_DEL(frame_duplicate_count);
DEBUGFS_STATS_DEL(received_fragment_count);
DEBUGFS_STATS_DEL(multicast_received_frame_count);
DEBUGFS_STATS_DEL(transmitted_frame_count);
DEBUGFS_STATS_DEL(num_scans);
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
DEBUGFS_STATS_DEL(tx_handlers_drop);
DEBUGFS_STATS_DEL(tx_handlers_queued);
DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
DEBUGFS_STATS_DEL(rx_handlers_drop);
DEBUGFS_STATS_DEL(rx_handlers_queued);
DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
DEBUGFS_STATS_DEL(rx_handlers_drop_short);
DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
DEBUGFS_STATS_DEL(tx_expand_skb_head);
DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
DEBUGFS_STATS_DEL(rx_expand_skb_head);
DEBUGFS_STATS_DEL(rx_expand_skb_head2);
DEBUGFS_STATS_DEL(rx_handlers_fragments);
DEBUGFS_STATS_DEL(tx_status_drop);
#endif
DEBUGFS_STATS_DEL(dot11ACKFailureCount);
DEBUGFS_STATS_DEL(dot11RTSFailureCount);
DEBUGFS_STATS_DEL(dot11FCSErrorCount);
DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
debugfs_remove(local->debugfs.statistics);
local->debugfs.statistics = NULL;
debugfs_remove(local->debugfs.stations);
local->debugfs.stations = NULL;
debugfs_remove(local->debugfs.keys);
local->debugfs.keys = NULL;
}
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