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7bcfaf2f43
We can save a lot of code and pointers in the structs by using debugfs_remove_recursive(). First, change cfg80211 to use debugfs_remove_recursive() so that drivers do not need to clean up any files they added to the per-wiphy debugfs (if and only if they are ok to be accessed until after wiphy_unregister!). Then also make mac80211 use debugfs_remove_recursive() where necessary -- it need not remove per-wiphy files as cfg80211 now removes those, but netdev etc. files still need to be handled but can now be removed without needing struct dentry pointers to all of them. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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* cfg80211 debugfs
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*
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* Copyright 2009 Luis R. Rodriguez <lrodriguez@atheros.com>
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "core.h"
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#include "debugfs.h"
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static int cfg80211_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 wiphy *wiphy= 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 = cfg80211_open_file_generic, \
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};
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DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
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wiphy->rts_threshold)
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DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
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wiphy->frag_threshold);
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DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
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wiphy->retry_short)
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DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
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wiphy->retry_long);
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static int ht_print_chan(struct ieee80211_channel *chan,
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char *buf, int buf_size, int offset)
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{
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if (WARN_ON(offset > buf_size))
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return 0;
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if (chan->flags & IEEE80211_CHAN_DISABLED)
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return snprintf(buf + offset,
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buf_size - offset,
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"%d Disabled\n",
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chan->center_freq);
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return snprintf(buf + offset,
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buf_size - offset,
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"%d HT40 %c%c\n",
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chan->center_freq,
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(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',
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(chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? ' ' : '+');
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}
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static ssize_t ht40allow_map_read(struct file *file,
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char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct wiphy *wiphy = file->private_data;
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char *buf;
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unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
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enum ieee80211_band band;
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struct ieee80211_supported_band *sband;
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buf = kzalloc(buf_size, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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mutex_lock(&cfg80211_mutex);
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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sband = wiphy->bands[band];
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if (!sband)
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continue;
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for (i = 0; i < sband->n_channels; i++)
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offset += ht_print_chan(&sband->channels[i],
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buf, buf_size, offset);
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}
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mutex_unlock(&cfg80211_mutex);
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r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
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kfree(buf);
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return r;
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}
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static const struct file_operations ht40allow_map_ops = {
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.read = ht40allow_map_read,
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.open = cfg80211_open_file_generic,
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};
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#define DEBUGFS_ADD(name) \
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debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
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void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
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{
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struct dentry *phyd = rdev->wiphy.debugfsdir;
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DEBUGFS_ADD(rts_threshold);
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DEBUGFS_ADD(fragmentation_threshold);
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DEBUGFS_ADD(short_retry_limit);
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DEBUGFS_ADD(long_retry_limit);
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DEBUGFS_ADD(ht40allow_map);
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}
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