cregit-Linux how code gets into the kernel

Release 4.8 net/mac80211/debugfs_sta.c

Directory: net/mac80211
/*
 * Copyright 2003-2005  Devicescape Software, Inc.
 * Copyright (c) 2006   Jiri Benc <jbenc@suse.cz>
 * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright(c) 2016 Intel Deutschland GmbH
 *
 * 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/debugfs.h>
#include <linux/ieee80211.h>
#include "ieee80211_i.h"
#include "debugfs.h"
#include "debugfs_sta.h"
#include "sta_info.h"
#include "driver-ops.h"

/* sta attributtes */


#define STA_READ(name, field, format_string)				\
static ssize_t sta_ ##name## _read(struct file *file,                   \
                                   char __user *userbuf,                \
                                   size_t count, loff_t *ppos)          \
{                                                                       \
        struct sta_info *sta = file->private_data;                      \
        return mac80211_format_buffer(userbuf, count, ppos,             \
                                      format_string, sta->field);       \
}

#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")


#define STA_OPS(name)							\
static const struct file_operations sta_ ##name## _ops = {              \
        .read = sta_##name##_read,                                      \
        .open = simple_open,                                            \
        .llseek = generic_file_llseek,                                  \
}


#define STA_OPS_RW(name)						\
static const struct file_operations sta_ ##name## _ops = {              \
        .read = sta_##name##_read,                                      \
        .write = sta_##name##_write,                                    \
        .open = simple_open,                                            \
        .llseek = generic_file_llseek,                                  \
}


#define STA_FILE(name, field, format)					\
		STA_READ_##format(name, field)                          \
                STA_OPS(name)

STA_FILE(aid, sta.aid, D);


static const char * const sta_flag_names[] = {

#define FLAG(F) [WLAN_STA_##F] = #F
	FLAG(AUTH),
	FLAG(ASSOC),
	FLAG(PS_STA),
	FLAG(AUTHORIZED),
	FLAG(SHORT_PREAMBLE),
	FLAG(WDS),
	FLAG(CLEAR_PS_FILT),
	FLAG(MFP),
	FLAG(BLOCK_BA),
	FLAG(PS_DRIVER),
	FLAG(PSPOLL),
	FLAG(TDLS_PEER),
	FLAG(TDLS_PEER_AUTH),
	FLAG(TDLS_INITIATOR),
	FLAG(TDLS_CHAN_SWITCH),
	FLAG(TDLS_OFF_CHANNEL),
	FLAG(TDLS_WIDER_BW),
	FLAG(UAPSD),
	FLAG(SP),
	FLAG(4ADDR_EVENT),
	FLAG(INSERTED),
	FLAG(RATE_CONTROL),
	FLAG(TOFFSET_KNOWN),
	FLAG(MPSP_OWNER),
	FLAG(MPSP_RECIPIENT),
	FLAG(PS_DELIVER),

#undef FLAG
};


static ssize_t sta_flags_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf; char *end = buf + sizeof(buf) - 1; struct sta_info *sta = file->private_data; unsigned int flg; BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS); for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) { if (test_sta_flag(sta, flg)) pos += scnprintf(pos, end - pos, "%s\n", sta_flag_names[flg]); } return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); }

Contributors

PersonTokensPropCommitsCommitProp
johannes bergjohannes berg11789.31%150.00%
jiri bencjiri benc1410.69%150.00%
Total131100.00%2100.00%

STA_OPS(flags);
static ssize_t sta_num_ps_buf_frames_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct sta_info *sta = file->private_data; char buf[17*IEEE80211_NUM_ACS], *p = buf; int ac; for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac, skb_queue_len(&sta->ps_tx_buf[ac]) + skb_queue_len(&sta->tx_filtered[ac])); return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); }

Contributors

PersonTokensPropCommitsCommitProp
johannes bergjohannes berg7361.34%133.33%
jiri bencjiri benc4537.82%133.33%
eliad pellereliad peller10.84%133.33%
Total119100.00%3100.00%

STA_OPS(num_ps_buf_frames);
static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { char buf[15*IEEE80211_NUM_TIDS], *p = buf; int i; struct sta_info *sta = file->private_data; for (i = 0; i < IEEE80211_NUM_TIDS; i++) p += scnprintf(p, sizeof(buf)+buf-p, "%x ", le16_to_cpu(sta->last_seq_ctrl[i])); p += scnprintf(p, sizeof(buf)+buf-p, "\n"); return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); }

Contributors

PersonTokensPropCommitsCommitProp
jiri bencjiri benc11895.93%133.33%
yi zhuyi zhu32.44%133.33%
johannes bergjohannes berg21.63%133.33%
Total123100.00%3100.00%

STA_OPS(last_seq_ctrl);
static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf; int i; struct sta_info *sta = file->private_data; struct tid_ampdu_rx *tid_rx; struct tid_ampdu_tx *tid_tx; rcu_read_lock(); p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", sta->ampdu_mlme.dialog_token_allocator + 1); p += scnprintf(p, sizeof(buf) + buf - p, "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); for (i = 0; i < IEEE80211_NUM_TIDS; i++) { tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", tid_rx ? tid_rx->dialog_token : 0); p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", tid_rx ? tid_rx->ssn : 0); p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", tid_tx ? tid_tx->dialog_token : 0); p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", tid_tx ? skb_queue_len(&tid_tx->pending) : 0); p += scnprintf(p, sizeof(buf) + buf - p, "\n"); } rcu_read_unlock(); return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); }

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ron rindjunskyron rindjunsky22863.51%218.18%
johannes bergjohannes berg7520.89%763.64%
jiri bencjiri benc308.36%19.09%
pavel roskinpavel roskin267.24%19.09%
Total359100.00%11100.00%


static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { char _buf[25] = {}, *buf = _buf; struct sta_info *sta = file->private_data; bool start, tx; unsigned long tid; char *pos; int ret, timeout = 5000; if (count > sizeof(_buf)) return -EINVAL; if (copy_from_user(buf, userbuf, count)) return -EFAULT; buf[sizeof(_buf) - 1] = '\0'; pos = buf; buf = strsep(&pos, " "); if (!buf) return -EINVAL; if (!strcmp(buf, "tx")) tx = true; else if (!strcmp(buf, "rx")) tx = false; else return -EINVAL; buf = strsep(&pos, " "); if (!buf) return -EINVAL; if (!strcmp(buf, "start")) { start = true; if (!tx) return -EINVAL; } else if (!strcmp(buf, "stop")) { start = false; } else { return -EINVAL; } buf = strsep(&pos, " "); if (!buf) return -EINVAL; if (sscanf(buf, "timeout=%d", &timeout) == 1) { buf = strsep(&pos, " "); if (!buf || !tx || !start) return -EINVAL; } ret = kstrtoul(buf, 0, &tid); if (ret || tid >= IEEE80211_NUM_TIDS) return -EINVAL; if (tx) { if (start) ret = ieee80211_start_tx_ba_session(&sta->sta, tid, timeout); else ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); } else { __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3, true); ret = 0; } return ret ?: count; }

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johannes bergjohannes berg23762.70%457.14%
sara sharonsara sharon12733.60%114.29%
abhijit pawarabhijit pawar133.44%114.29%
sujith manoharansujith manoharan10.26%114.29%
Total378100.00%7100.00%

STA_OPS_RW(agg_status);
static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { #define PRINT_HT_CAP(_cond, _str) \ do { \ if (_cond) \ p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ } while (0) char buf[512], *p = buf; int i; struct sta_info *sta = file->private_data; struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", htc->ht_supported ? "" : "not "); if (htc->ht_supported) { p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " "3839 bytes"); PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " "7935 bytes"); /* * For beacons and probe response this would mean the BSS * does or does not allow the usage of DSSS/CCK HT40. * Otherwise it means the STA does or does not use * DSSS/CCK HT40. */ PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); /* BIT(13) is reserved */ PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", htc->ampdu_factor, htc->ampdu_density); p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", htc->mcs.rx_mask[i]); p += scnprintf(p, sizeof(buf)+buf-p, "\n"); /* If not set this is meaningless */ if (le16_to_cpu(htc->mcs.rx_highest)) { p += scnprintf(p, sizeof(buf)+buf-p, "MCS rx highest: %d Mbps\n", le16_to_cpu(htc->mcs.rx_highest)); } p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", htc->mcs.tx_params); } return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); }

Contributors

PersonTokensPropCommitsCommitProp
luis r. rodriguezluis r. rodriguez40760.66%457.14%
johannes bergjohannes berg26239.05%114.29%
pavel roskinpavel roskin10.15%114.29%
ben greearben greear10.15%114.29%
Total671100.00%7100.00%

STA_OPS(ht_capa);
static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { char buf[512], *p = buf; struct sta_info *sta = file->private_data; struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap; p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n", vhtc->vht_supported ? "" : "not "); if (vhtc->vht_supported) { p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n", vhtc->cap); #define PFLAG(a, b) \ do { \ if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \ p += scnprintf(p, sizeof(buf) + buf - p, \ "\t\t%s\n", b); \ } while (0) switch (vhtc->cap & 0x3) { case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: p += scnprintf(p, sizeof(buf) + buf - p, "\t\tMAX-MPDU-3895\n"); break; case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: p += scnprintf(p, sizeof(buf) + buf - p, "\t\tMAX-MPDU-7991\n"); break; case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: p += scnprintf(p, sizeof(buf) + buf - p, "\t\tMAX-MPDU-11454\n"); break; default: p += scnprintf(p, sizeof(buf) + buf - p, "\t\tMAX-MPDU-UNKNOWN\n"); }; switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { case 0: p += scnprintf(p, sizeof(buf) + buf - p, "\t\t80Mhz\n"); break; case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: p += scnprintf(p, sizeof(buf) + buf - p, "\t\t160Mhz\n"); break; case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: p += scnprintf(p, sizeof(buf) + buf - p, "\t\t80+80Mhz\n"); break; default: p += scnprintf(p, sizeof(buf) + buf - p, "\t\tUNKNOWN-MHZ: 0x%x\n", (vhtc->cap >> 2) & 0x3); }; PFLAG(RXLDPC, "RXLDPC"); PFLAG(SHORT_GI_80, "SHORT-GI-80"); PFLAG(SHORT_GI_160, "SHORT-GI-160"); PFLAG(TXSTBC, "TXSTBC"); p += scnprintf(p, sizeof(buf) + buf - p, "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7); PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE"); PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE"); p += scnprintf(p, sizeof(buf) + buf - p, "\t\tBEAMFORMEE-STS: 0x%x\n", (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >> IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT); p += scnprintf(p, sizeof(buf) + buf - p, "\t\tSOUNDING-DIMENSIONS: 0x%x\n", (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK) >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT); PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE"); PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE"); PFLAG(VHT_TXOP_PS, "TXOP-PS"); PFLAG(HTC_VHT, "HTC-VHT"); p += scnprintf(p, sizeof(buf) + buf - p, "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n", (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >> IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT); PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB, "LINK-ADAPTATION-VHT-UNSOL-MFB"); p += scnprintf(p, sizeof(buf) + buf - p, "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n", (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26); PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN"); PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN"); p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n", le16_to_cpu(vhtc->vht_mcs.rx_mcs_map)); if (vhtc->vht_mcs.rx_highest) p += scnprintf(p, sizeof(buf)+buf-p, "MCS RX highest: %d Mbps\n", le16_to_cpu(vhtc->vht_mcs.rx_highest)); p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n", le16_to_cpu(vhtc->vht_mcs.tx_mcs_map)); if (vhtc->vht_mcs.tx_highest) p += scnprintf(p, sizeof(buf)+buf-p, "MCS TX highest: %d Mbps\n", le16_to_cpu(vhtc->vht_mcs.tx_highest)); } return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); }

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PersonTokensPropCommitsCommitProp
ben greearben greear44463.98%150.00%
johannes bergjohannes berg25036.02%150.00%
Total694100.00%2100.00%

STA_OPS(vht_capa); #define DEBUGFS_ADD(name) \ debugfs_create_file(#name, 0400, \ sta->debugfs_dir, sta, &sta_ ##name## _ops); #define DEBUGFS_ADD_COUNTER(name, field) \ if (sizeof(sta->field) == sizeof(u32)) \ debugfs_create_u32(#name, 0400, sta->debugfs_dir, \ (u32 *) &sta->field); \ else \ debugfs_create_u64(#name, 0400, sta->debugfs_dir, \ (u64 *) &sta->field);
void ieee80211_sta_debugfs_add(struct sta_info *sta) { struct ieee80211_local *local = sta->local; struct ieee80211_sub_if_data *sdata = sta->sdata; struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; u8 mac[3*ETH_ALEN]; if (!stations_dir) return; snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); /* * This might fail due to a race condition: * When mac80211 unlinks a station, the debugfs entries * remain, but it is already possible to link a new * station with the same address which triggers adding * it to debugfs; therefore, if the old station isn't * destroyed quickly enough the old station's debugfs * dir might still be around. */ sta->debugfs_dir = debugfs_create_dir(mac, stations_dir); if (!sta->debugfs_dir) return; DEBUGFS_ADD(flags); 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_COUNTER(rx_duplicates, rx_stats.num_duplicates); DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments); DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered); if (sizeof(sta->driver_buffered_tids) == sizeof(u32)) debugfs_create_x32("driver_buffered_tids", 0400, sta->debugfs_dir, (u32 *)&sta->driver_buffered_tids); else debugfs_create_x64("driver_buffered_tids", 0400, sta->debugfs_dir, (u64 *)&sta->driver_buffered_tids); drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir