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authorJohannes Berg <johannes@sipsolutions.net>2009-09-29 23:27:28 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-10-07 16:39:43 -0400
commit3d23e349d807177eaf519d444677cee86b1a04cf (patch)
treee800dee247598e59185ddd2dd47d2ac6fe090b9c /net/wireless/wext-proc.c
parentbc974f4a230756faf4f69114f271de2e678b363b (diff)
downloadlinux-3d23e349d807177eaf519d444677cee86b1a04cf.tar.bz2
wext: refactor
Refactor wext to * split out iwpriv handling * split out iwspy handling * split out procfs support * allow cfg80211 to have wireless extensions compat code w/o CONFIG_WIRELESS_EXT After this, drivers need to - select WIRELESS_EXT - for wext support - select WEXT_PRIV - for iwpriv support - select WEXT_SPY - for iwspy support except cfg80211 -- which gets new hooks in wext-core.c and can then get wext handlers without CONFIG_WIRELESS_EXT. Wireless extensions procfs support is auto-selected based on PROC_FS and anything that requires the wext core (i.e. WIRELESS_EXT or CFG80211_WEXT). Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/wext-proc.c')
-rw-r--r--net/wireless/wext-proc.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/net/wireless/wext-proc.c b/net/wireless/wext-proc.c
new file mode 100644
index 000000000000..273a7f77c834
--- /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");
+}