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110 lines
2.8 KiB
110 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* cfg80211 debugfs |
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* |
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* Copyright 2009 Luis R. Rodriguez <[email protected]> |
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* Copyright 2007 Johannes Berg <[email protected]> |
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*/ |
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#include <linux/slab.h> |
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#include "core.h" |
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#include "debugfs.h" |
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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 = simple_open, \ |
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.llseek = generic_file_llseek, \ |
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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 scnprintf(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 scnprintf(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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' ' : '-', |
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(chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? |
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' ' : '+'); |
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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 nl80211_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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for (band = 0; band < NUM_NL80211_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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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 = simple_open, |
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.llseek = default_llseek, |
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}; |
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#define DEBUGFS_ADD(name) \ |
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debugfs_create_file(#name, 0444, 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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