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wifi: mac80211: add API to show the link STAs in debugfs

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Create debugfs data per-link. For drivers, there is a new operation
link_sta_add_debugfs which will always be called.

For non-MLO, the station directory will be used directly rather than
creating a corresponding subdirectory. As such, non-MLO drivers can
simply continue to create the data from sta_debugfs_add.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
[add missing inlines if !CONFIG_MAC80211_DEBUGFS]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg
2022-09-06 14:26:52 +02:00
committed by Johannes Berg
parent 1d9e4c91db
commit d2caad527c
7 changed files with 200 additions and 23 deletions
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127
net/mac80211/debugfs_sta.c
View File

@@ -5,7 +5,7 @@
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
* Copyright (C) 2018 - 2021 Intel Corporation
* Copyright (C) 2018 - 2022 Intel Corporation
*/
#include <linux/debugfs.h>
@@ -435,8 +435,16 @@ static ssize_t sta_agg_status_write(struct file *file, const char __user *userbu
}
STA_OPS_RW(agg_status);
static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
/* link sta attributes */
#define LINK_STA_OPS(name) \
static const struct file_operations link_sta_ ##name## _ops = { \
.read = link_sta_##name##_read, \
.open = simple_open, \
.llseek = generic_file_llseek, \
}
static ssize_t link_sta_ht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
#define PRINT_HT_CAP(_cond, _str) \
do { \
@@ -446,8 +454,8 @@ static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
char *buf, *p;
int i;
ssize_t bufsz = 512;
struct sta_info *sta = file->private_data;
struct ieee80211_sta_ht_cap *htc = &sta->sta.deflink.ht_cap;
struct link_sta_info *link_sta = file->private_data;
struct ieee80211_sta_ht_cap *htc = &link_sta->pub->ht_cap;
ssize_t ret;
buf = kzalloc(bufsz, GFP_KERNEL);
@@ -524,14 +532,14 @@ static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
kfree(buf);
return ret;
}
STA_OPS(ht_capa);
LINK_STA_OPS(ht_capa);
static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
static ssize_t link_sta_vht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char *buf, *p;
struct sta_info *sta = file->private_data;
struct ieee80211_sta_vht_cap *vhtc = &sta->sta.deflink.vht_cap;
struct link_sta_info *link_sta = file->private_data;
struct ieee80211_sta_vht_cap *vhtc = &link_sta->pub->vht_cap;
ssize_t ret;
ssize_t bufsz = 512;
@@ -638,15 +646,15 @@ static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
kfree(buf);
return ret;
}
STA_OPS(vht_capa);
LINK_STA_OPS(vht_capa);
static ssize_t sta_he_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
static ssize_t link_sta_he_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char *buf, *p;
size_t buf_sz = PAGE_SIZE;
struct sta_info *sta = file->private_data;
struct ieee80211_sta_he_cap *hec = &sta->sta.deflink.he_cap;
struct link_sta_info *link_sta = file->private_data;
struct ieee80211_sta_he_cap *hec = &link_sta->pub->he_cap;
struct ieee80211_he_mcs_nss_supp *nss = &hec->he_mcs_nss_supp;
u8 ppe_size;
u8 *cap;
@@ -1011,7 +1019,7 @@ out:
kfree(buf);
return ret;
}
STA_OPS(he_capa);
LINK_STA_OPS(he_capa);
#define DEBUGFS_ADD(name) \
debugfs_create_file(#name, 0400, \
@@ -1048,12 +1056,7 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
DEBUGFS_ADD(num_ps_buf_frames);
DEBUGFS_ADD(last_seq_ctrl);
DEBUGFS_ADD(agg_status);
DEBUGFS_ADD(ht_capa);
DEBUGFS_ADD(vht_capa);
DEBUGFS_ADD(he_capa);
DEBUGFS_ADD_COUNTER(rx_duplicates, deflink.rx_stats.num_duplicates);
DEBUGFS_ADD_COUNTER(rx_fragments, deflink.rx_stats.fragments);
/* FIXME: Kept here as the statistics are only done on the deflink */
DEBUGFS_ADD_COUNTER(tx_filtered, deflink.status_stats.filtered);
if (local->ops->wake_tx_queue) {
@@ -1076,3 +1079,83 @@ void ieee80211_sta_debugfs_remove(struct sta_info *sta)
debugfs_remove_recursive(sta->debugfs_dir);
sta->debugfs_dir = NULL;
}
#undef DEBUGFS_ADD
#undef DEBUGFS_ADD_COUNTER
#define DEBUGFS_ADD(name) \
debugfs_create_file(#name, 0400, \
link_sta->debugfs_dir, link_sta, &link_sta_ ##name## _ops)
#define DEBUGFS_ADD_COUNTER(name, field) \
debugfs_create_ulong(#name, 0400, link_sta->debugfs_dir, &link_sta->field)
void ieee80211_link_sta_debugfs_add(struct link_sta_info *link_sta)
{
if (WARN_ON(!link_sta->sta->debugfs_dir))
return;
/* For non-MLO, leave the files in the main directory. */
if (link_sta->sta->sta.valid_links) {
char link_dir_name[10];
snprintf(link_dir_name, sizeof(link_dir_name),
"link-%d", link_sta->link_id);
link_sta->debugfs_dir =
debugfs_create_dir(link_dir_name,
link_sta->sta->debugfs_dir);
} else {
if (WARN_ON(link_sta != &link_sta->sta->deflink))
return;
link_sta->debugfs_dir = link_sta->sta->debugfs_dir;
}
DEBUGFS_ADD(ht_capa);
DEBUGFS_ADD(vht_capa);
DEBUGFS_ADD(he_capa);
DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
}
void ieee80211_link_sta_debugfs_remove(struct link_sta_info *link_sta)
{
if (!link_sta->debugfs_dir || !link_sta->sta->debugfs_dir) {
link_sta->debugfs_dir = NULL;
return;
}
if (link_sta->debugfs_dir == link_sta->sta->debugfs_dir) {
WARN_ON(link_sta != &link_sta->sta->deflink);
link_sta->sta->debugfs_dir = NULL;
return;
}
debugfs_remove_recursive(link_sta->debugfs_dir);
link_sta->debugfs_dir = NULL;
}
void ieee80211_link_sta_debugfs_drv_add(struct link_sta_info *link_sta)
{
if (WARN_ON(!link_sta->debugfs_dir))
return;
drv_link_sta_add_debugfs(link_sta->sta->local, link_sta->sta->sdata,
link_sta->pub, link_sta->debugfs_dir);
}
void ieee80211_link_sta_debugfs_drv_remove(struct link_sta_info *link_sta)
{
if (!link_sta->debugfs_dir)
return;
if (WARN_ON(link_sta->debugfs_dir == link_sta->sta->debugfs_dir))
return;
/* Recreate the directory excluding the driver data */
debugfs_remove_recursive(link_sta->debugfs_dir);
link_sta->debugfs_dir = NULL;
ieee80211_link_sta_debugfs_add(link_sta);
}