forked from Minki/linux
2b18ab36cf
The default llseek operation is changing from default_llseek to no_llseek, so all code relying on the current behaviour needs to make that explicit. The wireless driver infrastructure and some of the drivers make use of generated debugfs files, so they cannot be converted by our script that automatically determines the right operation. All these files use debugfs and they typically rely on simple_read_from_buffer, so the best llseek operation here is generic_file_llseek. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org
448 lines
12 KiB
C
448 lines
12 KiB
C
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/*
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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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*
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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 "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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int mac80211_open_file_generic(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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#define DEBUGFS_READONLY_FILE(name, buflen, 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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char buf[buflen]; \
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int res; \
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\
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res = scnprintf(buf, buflen, fmt "\n", ##value); \
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return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
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} \
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\
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static const struct file_operations name## _ops = { \
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.read = name## _read, \
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.open = mac80211_open_file_generic, \
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.llseek = generic_file_llseek, \
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};
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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(frequency, 20, "%d",
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local->hw.conf.channel->center_freq);
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DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
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local->total_ps_buffered);
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DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
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local->wep_iv & 0xffffff);
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DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
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local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
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static ssize_t tsf_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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u64 tsf;
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char buf[100];
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tsf = drv_get_tsf(local);
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snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
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return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
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}
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static ssize_t tsf_write(struct file *file,
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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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unsigned long long tsf;
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char buf[100];
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size_t len;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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if (strncmp(buf, "reset", 5) == 0) {
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if (local->ops->reset_tsf) {
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drv_reset_tsf(local);
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printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
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}
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} else {
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tsf = simple_strtoul(buf, NULL, 0);
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if (local->ops->set_tsf) {
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drv_set_tsf(local, tsf);
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printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
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}
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}
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return count;
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}
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static const struct file_operations tsf_ops = {
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.read = tsf_read,
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.write = tsf_write,
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.open = mac80211_open_file_generic
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};
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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);
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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 = mac80211_open_file_generic,
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};
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static ssize_t noack_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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int res;
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char buf[10];
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res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
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return simple_read_from_buffer(user_buf, count, ppos, buf, res);
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}
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static ssize_t noack_write(struct file *file,
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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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char buf[10];
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size_t len;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
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return count;
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}
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static const struct file_operations noack_ops = {
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.read = noack_read,
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.write = noack_write,
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.open = mac80211_open_file_generic
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};
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static ssize_t uapsd_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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int res;
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char buf[10];
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res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);
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return simple_read_from_buffer(user_buf, count, ppos, buf, res);
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}
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static ssize_t uapsd_queues_write(struct file *file,
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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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unsigned long val;
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char buf[10];
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size_t len;
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int ret;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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ret = strict_strtoul(buf, 0, &val);
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if (ret)
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return -EINVAL;
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if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
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return -ERANGE;
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local->uapsd_queues = val;
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return count;
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}
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static const struct file_operations uapsd_queues_ops = {
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.read = uapsd_queues_read,
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.write = uapsd_queues_write,
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.open = mac80211_open_file_generic
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};
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static ssize_t uapsd_max_sp_len_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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int res;
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char buf[10];
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res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);
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return simple_read_from_buffer(user_buf, count, ppos, buf, res);
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}
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static ssize_t uapsd_max_sp_len_write(struct file *file,
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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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unsigned long val;
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char buf[10];
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size_t len;
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int ret;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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ret = strict_strtoul(buf, 0, &val);
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if (ret)
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return -EINVAL;
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if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
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return -ERANGE;
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local->uapsd_max_sp_len = val;
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return count;
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}
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static const struct file_operations uapsd_max_sp_len_ops = {
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.read = uapsd_max_sp_len_read,
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.write = uapsd_max_sp_len_write,
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.open = mac80211_open_file_generic
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};
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static ssize_t channel_type_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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const char *buf;
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switch (local->hw.conf.channel_type) {
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case NL80211_CHAN_NO_HT:
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buf = "no ht\n";
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break;
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case NL80211_CHAN_HT20:
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buf = "ht20\n";
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break;
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case NL80211_CHAN_HT40MINUS:
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buf = "ht40-\n";
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break;
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case NL80211_CHAN_HT40PLUS:
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buf = "ht40+\n";
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break;
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default:
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buf = "???";
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break;
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}
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return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
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}
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static const struct file_operations channel_type_ops = {
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.read = channel_type_read,
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.open = mac80211_open_file_generic
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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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static const struct file_operations queues_ops = {
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.read = queues_read,
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.open = mac80211_open_file_generic
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};
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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 = mac80211_open_file_generic, \
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.llseek = generic_file_llseek, \
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};
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#define DEBUGFS_STATS_ADD(name, field) \
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debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
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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.stations = debugfs_create_dir("stations", phyd);
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local->debugfs.keys = debugfs_create_dir("keys", phyd);
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DEBUGFS_ADD(frequency);
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DEBUGFS_ADD(total_ps_buffered);
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DEBUGFS_ADD(wep_iv);
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DEBUGFS_ADD(tsf);
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DEBUGFS_ADD(queues);
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DEBUGFS_ADD_MODE(reset, 0200);
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DEBUGFS_ADD(noack);
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DEBUGFS_ADD(uapsd_queues);
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DEBUGFS_ADD(uapsd_max_sp_len);
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DEBUGFS_ADD(channel_type);
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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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DEBUGFS_STATS_ADD(transmitted_fragment_count,
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local->dot11TransmittedFragmentCount);
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DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
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local->dot11MulticastTransmittedFrameCount);
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DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
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DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
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DEBUGFS_STATS_ADD(multiple_retry_count,
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local->dot11MultipleRetryCount);
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DEBUGFS_STATS_ADD(frame_duplicate_count,
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local->dot11FrameDuplicateCount);
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DEBUGFS_STATS_ADD(received_fragment_count,
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local->dot11ReceivedFragmentCount);
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DEBUGFS_STATS_ADD(multicast_received_frame_count,
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local->dot11MulticastReceivedFrameCount);
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DEBUGFS_STATS_ADD(transmitted_frame_count,
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local->dot11TransmittedFrameCount);
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#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
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DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
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DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
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DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
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local->tx_handlers_drop_unencrypted);
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DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
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local->tx_handlers_drop_fragment);
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DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
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local->tx_handlers_drop_wep);
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DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
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local->tx_handlers_drop_not_assoc);
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DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
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local->tx_handlers_drop_unauth_port);
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DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
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DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
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DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
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local->rx_handlers_drop_nullfunc);
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DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
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local->rx_handlers_drop_defrag);
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DEBUGFS_STATS_ADD(rx_handlers_drop_short,
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local->rx_handlers_drop_short);
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DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
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local->rx_handlers_drop_passive_scan);
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DEBUGFS_STATS_ADD(tx_expand_skb_head,
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local->tx_expand_skb_head);
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DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
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local->tx_expand_skb_head_cloned);
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DEBUGFS_STATS_ADD(rx_expand_skb_head,
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local->rx_expand_skb_head);
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DEBUGFS_STATS_ADD(rx_expand_skb_head2,
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local->rx_expand_skb_head2);
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DEBUGFS_STATS_ADD(rx_handlers_fragments,
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local->rx_handlers_fragments);
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DEBUGFS_STATS_ADD(tx_status_drop,
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local->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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