417 lines
11 KiB
C
417 lines
11 KiB
C
/*
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* mac80211 debugfs for wireless PHYs
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*
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2013-2014 Intel Mobile Communications GmbH
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*
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* GPLv2
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*
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*/
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#include <linux/debugfs.h>
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#include <linux/rtnetlink.h>
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#include <linux/vmalloc.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#include "debugfs.h"
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#define DEBUGFS_FORMAT_BUFFER_SIZE 100
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int mac80211_format_buffer(char __user *userbuf, size_t count,
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loff_t *ppos, char *fmt, ...)
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{
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va_list args;
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char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
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int res;
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va_start(args, fmt);
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res = vscnprintf(buf, sizeof(buf), fmt, args);
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va_end(args);
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return simple_read_from_buffer(userbuf, count, ppos, buf, res);
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}
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#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
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static ssize_t name## _read(struct file *file, char __user *userbuf, \
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size_t count, loff_t *ppos) \
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{ \
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struct ieee80211_local *local = file->private_data; \
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\
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return mac80211_format_buffer(userbuf, count, ppos, \
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fmt "\n", ##value); \
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}
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#define DEBUGFS_READONLY_FILE_OPS(name) \
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static const struct file_operations name## _ops = { \
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.read = name## _read, \
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.open = simple_open, \
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.llseek = generic_file_llseek, \
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};
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#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
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DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
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DEBUGFS_READONLY_FILE_OPS(name)
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#define DEBUGFS_ADD(name) \
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debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
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#define DEBUGFS_ADD_MODE(name, mode) \
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debugfs_create_file(#name, mode, phyd, local, &name## _ops);
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DEBUGFS_READONLY_FILE(user_power, "%d",
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local->user_power_level);
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DEBUGFS_READONLY_FILE(power, "%d",
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local->hw.conf.power_level);
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DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
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local->total_ps_buffered);
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DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
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local->wep_iv & 0xffffff);
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DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
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local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
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static ssize_t aqm_read(struct file *file,
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char __user *user_buf,
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size_t count,
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loff_t *ppos)
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{
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struct ieee80211_local *local = file->private_data;
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struct fq *fq = &local->fq;
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char buf[200];
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int len = 0;
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spin_lock_bh(&local->fq.lock);
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rcu_read_lock();
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len = scnprintf(buf, sizeof(buf),
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"access name value\n"
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"R fq_flows_cnt %u\n"
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"R fq_backlog %u\n"
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"R fq_overlimit %u\n"
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"R fq_overmemory %u\n"
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"R fq_collisions %u\n"
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"R fq_memory_usage %u\n"
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"RW fq_memory_limit %u\n"
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"RW fq_limit %u\n"
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"RW fq_quantum %u\n",
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fq->flows_cnt,
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fq->backlog,
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fq->overmemory,
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fq->overlimit,
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fq->collisions,
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fq->memory_usage,
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fq->memory_limit,
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fq->limit,
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fq->quantum);
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rcu_read_unlock();
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spin_unlock_bh(&local->fq.lock);
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return simple_read_from_buffer(user_buf, count, ppos,
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buf, len);
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}
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static ssize_t aqm_write(struct file *file,
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const char __user *user_buf,
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size_t count,
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loff_t *ppos)
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{
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struct ieee80211_local *local = file->private_data;
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char buf[100];
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size_t len;
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if (count > sizeof(buf))
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return -EINVAL;
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if (copy_from_user(buf, user_buf, count))
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return -EFAULT;
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buf[sizeof(buf) - 1] = '\0';
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len = strlen(buf);
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if (len > 0 && buf[len-1] == '\n')
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buf[len-1] = 0;
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if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
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return count;
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else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)
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return count;
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else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
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return count;
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return -EINVAL;
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}
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static const struct file_operations aqm_ops = {
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.write = aqm_write,
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.read = aqm_read,
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.open = simple_open,
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.llseek = default_llseek,
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};
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#ifdef CONFIG_PM
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static ssize_t reset_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_local *local = file->private_data;
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rtnl_lock();
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__ieee80211_suspend(&local->hw, NULL);
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__ieee80211_resume(&local->hw);
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rtnl_unlock();
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return count;
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}
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static const struct file_operations reset_ops = {
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.write = reset_write,
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.open = simple_open,
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.llseek = noop_llseek,
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};
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#endif
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static const char *hw_flag_names[] = {
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#define FLAG(F) [IEEE80211_HW_##F] = #F
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FLAG(HAS_RATE_CONTROL),
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FLAG(RX_INCLUDES_FCS),
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FLAG(HOST_BROADCAST_PS_BUFFERING),
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FLAG(SIGNAL_UNSPEC),
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FLAG(SIGNAL_DBM),
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FLAG(NEED_DTIM_BEFORE_ASSOC),
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FLAG(SPECTRUM_MGMT),
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FLAG(AMPDU_AGGREGATION),
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FLAG(SUPPORTS_PS),
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FLAG(PS_NULLFUNC_STACK),
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FLAG(SUPPORTS_DYNAMIC_PS),
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FLAG(MFP_CAPABLE),
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FLAG(WANT_MONITOR_VIF),
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FLAG(NO_AUTO_VIF),
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FLAG(SW_CRYPTO_CONTROL),
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FLAG(SUPPORT_FAST_XMIT),
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FLAG(REPORTS_TX_ACK_STATUS),
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FLAG(CONNECTION_MONITOR),
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FLAG(QUEUE_CONTROL),
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FLAG(SUPPORTS_PER_STA_GTK),
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FLAG(AP_LINK_PS),
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FLAG(TX_AMPDU_SETUP_IN_HW),
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FLAG(SUPPORTS_RC_TABLE),
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FLAG(P2P_DEV_ADDR_FOR_INTF),
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FLAG(TIMING_BEACON_ONLY),
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FLAG(SUPPORTS_HT_CCK_RATES),
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FLAG(CHANCTX_STA_CSA),
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FLAG(SUPPORTS_CLONED_SKBS),
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FLAG(SINGLE_SCAN_ON_ALL_BANDS),
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FLAG(TDLS_WIDER_BW),
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FLAG(SUPPORTS_AMSDU_IN_AMPDU),
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FLAG(BEACON_TX_STATUS),
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FLAG(NEEDS_UNIQUE_STA_ADDR),
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FLAG(SUPPORTS_REORDERING_BUFFER),
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FLAG(USES_RSS),
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FLAG(TX_AMSDU),
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FLAG(TX_FRAG_LIST),
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FLAG(REPORTS_LOW_ACK),
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FLAG(SUPPORTS_TX_FRAG),
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FLAG(SUPPORTS_TDLS_BUFFER_STA),
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FLAG(DEAUTH_NEED_MGD_TX_PREP),
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#undef FLAG
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};
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static ssize_t hwflags_read(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_local *local = file->private_data;
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size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
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char *buf = kzalloc(bufsz, GFP_KERNEL);
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char *pos = buf, *end = buf + bufsz - 1;
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ssize_t rv;
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int i;
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if (!buf)
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return -ENOMEM;
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/* fail compilation if somebody adds or removes
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* a flag without updating the name array above
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*/
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BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
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for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
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if (test_bit(i, local->hw.flags))
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pos += scnprintf(pos, end - pos, "%s\n",
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hw_flag_names[i]);
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}
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rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
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kfree(buf);
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return rv;
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}
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static ssize_t misc_read(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_local *local = file->private_data;
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/* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
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size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
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char *buf;
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char *pos, *end;
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ssize_t rv;
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int i;
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int ln;
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buf = kzalloc(bufsz, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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pos = buf;
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end = buf + bufsz - 1;
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pos += scnprintf(pos, end - pos, "pending:\n");
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for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
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ln = skb_queue_len(&local->pending[i]);
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pos += scnprintf(pos, end - pos, "[%i] %d\n",
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i, ln);
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}
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rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
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kfree(buf);
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return rv;
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}
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static ssize_t queues_read(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_local *local = file->private_data;
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unsigned long flags;
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char buf[IEEE80211_MAX_QUEUES * 20];
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int q, res = 0;
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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for (q = 0; q < local->hw.queues; q++)
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res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
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local->queue_stop_reasons[q],
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skb_queue_len(&local->pending[q]));
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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return simple_read_from_buffer(user_buf, count, ppos, buf, res);
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}
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DEBUGFS_READONLY_FILE_OPS(hwflags);
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DEBUGFS_READONLY_FILE_OPS(queues);
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DEBUGFS_READONLY_FILE_OPS(misc);
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/* statistics stuff */
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static ssize_t format_devstat_counter(struct ieee80211_local *local,
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char __user *userbuf,
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size_t count, loff_t *ppos,
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int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
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int buflen))
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{
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struct ieee80211_low_level_stats stats;
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char buf[20];
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int res;
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rtnl_lock();
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res = drv_get_stats(local, &stats);
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rtnl_unlock();
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if (res)
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return res;
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res = printvalue(&stats, buf, sizeof(buf));
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return simple_read_from_buffer(userbuf, count, ppos, buf, res);
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}
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#define DEBUGFS_DEVSTATS_FILE(name) \
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static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
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char *buf, int buflen) \
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{ \
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return scnprintf(buf, buflen, "%u\n", stats->name); \
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} \
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static ssize_t stats_ ##name## _read(struct file *file, \
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char __user *userbuf, \
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size_t count, loff_t *ppos) \
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{ \
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return format_devstat_counter(file->private_data, \
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userbuf, \
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count, \
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ppos, \
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print_devstats_##name); \
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} \
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\
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static const struct file_operations stats_ ##name## _ops = { \
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.read = stats_ ##name## _read, \
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.open = simple_open, \
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.llseek = generic_file_llseek, \
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};
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#define DEBUGFS_STATS_ADD(name) \
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debugfs_create_u32(#name, 0400, statsd, &local->name);
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#define DEBUGFS_DEVSTATS_ADD(name) \
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debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
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DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
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DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
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DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
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DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
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void debugfs_hw_add(struct ieee80211_local *local)
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{
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struct dentry *phyd = local->hw.wiphy->debugfsdir;
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struct dentry *statsd;
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if (!phyd)
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return;
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local->debugfs.keys = debugfs_create_dir("keys", phyd);
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DEBUGFS_ADD(total_ps_buffered);
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DEBUGFS_ADD(wep_iv);
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DEBUGFS_ADD(rate_ctrl_alg);
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DEBUGFS_ADD(queues);
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DEBUGFS_ADD(misc);
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#ifdef CONFIG_PM
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DEBUGFS_ADD_MODE(reset, 0200);
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#endif
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DEBUGFS_ADD(hwflags);
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DEBUGFS_ADD(user_power);
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DEBUGFS_ADD(power);
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if (local->ops->wake_tx_queue)
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DEBUGFS_ADD_MODE(aqm, 0600);
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statsd = debugfs_create_dir("statistics", phyd);
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/* if the dir failed, don't put all the other things into the root! */
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if (!statsd)
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return;
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#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
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DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
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DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
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DEBUGFS_STATS_ADD(dot11FailedCount);
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DEBUGFS_STATS_ADD(dot11RetryCount);
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DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
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DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
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DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
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DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
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DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
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DEBUGFS_STATS_ADD(tx_handlers_drop);
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DEBUGFS_STATS_ADD(tx_handlers_queued);
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DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
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DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
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DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
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DEBUGFS_STATS_ADD(rx_handlers_drop);
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DEBUGFS_STATS_ADD(rx_handlers_queued);
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DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
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DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
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DEBUGFS_STATS_ADD(tx_expand_skb_head);
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DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
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DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
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DEBUGFS_STATS_ADD(rx_handlers_fragments);
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DEBUGFS_STATS_ADD(tx_status_drop);
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#endif
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DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
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DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
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DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
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DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
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}
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