SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/wireless/debugfs.c

   1 /*
   2  * cfg80211 debugfs
   3  *
   4  * Copyright 2009       Luis R. Rodriguez <lrodriguez@atheros.com>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include "core.h"
  13 #include "debugfs.h"
  14
  15 static int cfg80211_open_file_generic(struct inode *inode, struct file *file)
  16 {
  17         file->private_data = inode->i_private;
  18         return 0;
  19 }
  20
  21 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  22 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  23                             size_t count, loff_t *ppos)                 \
  24 {                                                                       \
  25         struct wiphy *wiphy= file->private_data;                \
  26         char buf[buflen];                                               \
  27         int res;                                                        \
  28                                                                         \
  29         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  30         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  31 }                                                                       \
  32                                                                         \
  33 static const struct file_operations name## _ops = {                     \
  34         .read = name## _read,                                           \
  35         .open = cfg80211_open_file_generic,                             \
  36 };
  37
  38 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
  39                       wiphy->rts_threshold)
  40 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
  41                       wiphy->frag_threshold);
  42 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
  43                       wiphy->retry_short)
  44 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
  45                       wiphy->retry_long);
  46
  47 #define DEBUGFS_ADD(name)                                               \
  48         drv->debugfs.name = debugfs_create_file(#name, S_IRUGO, phyd,   \
  49                                                   &drv->wiphy, &name## _ops);
  50 #define DEBUGFS_DEL(name)                                               \
  51         debugfs_remove(drv->debugfs.name);                              \
  52         drv->debugfs.name = NULL;
  53
  54 void cfg80211_debugfs_drv_add(struct cfg80211_registered_device *drv)
  55 {
  56         struct dentry *phyd = drv->wiphy.debugfsdir;
  57
  58         DEBUGFS_ADD(rts_threshold);
  59         DEBUGFS_ADD(fragmentation_threshold);
  60         DEBUGFS_ADD(short_retry_limit);
  61         DEBUGFS_ADD(long_retry_limit);
  62 }
  63
  64 void cfg80211_debugfs_drv_del(struct cfg80211_registered_device *drv)
  65 {
  66         DEBUGFS_DEL(rts_threshold);
  67         DEBUGFS_DEL(fragmentation_threshold);
  68         DEBUGFS_DEL(short_retry_limit);
  69         DEBUGFS_DEL(long_retry_limit);
  70 }