mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
234e340582
Many users of debugfs copy the implementation of default_open() when
they want to support a custom read/write function op. This leads to a
proliferation of the default_open() implementation across the entire
tree.
Now that the common implementation has been consolidated into libfs we
can replace all the users of this function with simple_open().
This replacement was done with the following semantic patch:
<smpl>
@ open @
identifier open_f != simple_open;
identifier i, f;
@@
-int open_f(struct inode *i, struct file *f)
-{
(
-if (i->i_private)
-f->private_data = i->i_private;
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-f->private_data = i->i_private;
)
-return 0;
-}
@ has_open depends on open @
identifier fops;
identifier open.open_f;
@@
struct file_operations fops = {
...
-.open = open_f,
+.open = simple_open,
...
};
</smpl>
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
115 lines
3 KiB
C
115 lines
3 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 <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 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 = 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, 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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