wext: refactor

[linux-2.6-microblaze.git] / net / wireless / wext-proc.c

diff --git a/net/wireless/wext-proc.c b/net/wireless/wext-proc.c
new file mode 100644 (file)
index 0000000..273a7f7
--- /dev/null
+++ b/net/wireless/wext-proc.c
@@ -0,0 +1,155 @@
+/*
+ * This file implement the Wireless Extensions proc API.
+ *
+ * Authors :   Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+ * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
+ *
+ * (As all part of the Linux kernel, this file is GPL)
+ */
+
+/*
+ * The /proc/net/wireless file is a human readable user-space interface
+ * exporting various wireless specific statistics from the wireless devices.
+ * This is the most popular part of the Wireless Extensions ;-)
+ *
+ * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
+ * The content of the file is basically the content of "struct iw_statistics".
+ */
+
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/wireless.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <net/iw_handler.h>
+#include <net/wext.h>
+
+
+static void wireless_seq_printf_stats(struct seq_file *seq,
+                                     struct net_device *dev)
+{
+       /* Get stats from the driver */
+       struct iw_statistics *stats = get_wireless_stats(dev);
+       static struct iw_statistics nullstats = {};
+
+       /* show device if it's wireless regardless of current stats */
+       if (!stats) {
+#ifdef CONFIG_WIRELESS_EXT
+               if (dev->wireless_handlers)
+                       stats = &nullstats;
+#endif
+#ifdef CONFIG_CFG80211
+               if (dev->ieee80211_ptr)
+                       stats = &nullstats;
+#endif
+       }
+
+       if (stats) {
+               seq_printf(seq, "%6s: %04x  %3d%c  %3d%c  %3d%c  %6d %6d %6d "
+                               "%6d %6d   %6d\n",
+                          dev->name, stats->status, stats->qual.qual,
+                          stats->qual.updated & IW_QUAL_QUAL_UPDATED
+                          ? '.' : ' ',
+                          ((__s32) stats->qual.level) -
+                          ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
+                          stats->qual.updated & IW_QUAL_LEVEL_UPDATED
+                          ? '.' : ' ',
+                          ((__s32) stats->qual.noise) -
+                          ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
+                          stats->qual.updated & IW_QUAL_NOISE_UPDATED
+                          ? '.' : ' ',
+                          stats->discard.nwid, stats->discard.code,
+                          stats->discard.fragment, stats->discard.retries,
+                          stats->discard.misc, stats->miss.beacon);
+
+               if (stats != &nullstats)
+                       stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
+       }
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Print info for /proc/net/wireless (print all entries)
+ */
+static int wireless_dev_seq_show(struct seq_file *seq, void *v)
+{
+       might_sleep();
+
+       if (v == SEQ_START_TOKEN)
+               seq_printf(seq, "Inter-| sta-|   Quality        |   Discarded "
+                               "packets               | Missed | WE\n"
+                               " face | tus | link level noise |  nwid  "
+                               "crypt   frag  retry   misc | beacon | %d\n",
+                          WIRELESS_EXT);
+       else
+               wireless_seq_printf_stats(seq, v);
+       return 0;
+}
+
+static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+       struct net *net = seq_file_net(seq);
+       loff_t off;
+       struct net_device *dev;
+
+       rtnl_lock();
+       if (!*pos)
+               return SEQ_START_TOKEN;
+
+       off = 1;
+       for_each_netdev(net, dev)
+               if (off++ == *pos)
+                       return dev;
+       return NULL;
+}
+
+static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+       struct net *net = seq_file_net(seq);
+
+       ++*pos;
+
+       return v == SEQ_START_TOKEN ?
+               first_net_device(net) : next_net_device(v);
+}
+
+static void wireless_dev_seq_stop(struct seq_file *seq, void *v)
+{
+       rtnl_unlock();
+}
+
+static const struct seq_operations wireless_seq_ops = {
+       .start = wireless_dev_seq_start,
+       .next  = wireless_dev_seq_next,
+       .stop  = wireless_dev_seq_stop,
+       .show  = wireless_dev_seq_show,
+};
+
+static int seq_open_wireless(struct inode *inode, struct file *file)
+{
+       return seq_open_net(inode, file, &wireless_seq_ops,
+                           sizeof(struct seq_net_private));
+}
+
+static const struct file_operations wireless_seq_fops = {
+       .owner   = THIS_MODULE,
+       .open    = seq_open_wireless,
+       .read    = seq_read,
+       .llseek  = seq_lseek,
+       .release = seq_release_net,
+};
+
+int wext_proc_init(struct net *net)
+{
+       /* Create /proc/net/wireless entry */
+       if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops))
+               return -ENOMEM;
+
+       return 0;
+}
+
+void wext_proc_exit(struct net *net)
+{
+       proc_net_remove(net, "wireless");
+}