[MAC80211]: Add debugfs attributes.

Export various mac80211 internal variables through debugfs.

Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 252 insertions, 0 deletions

diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
new file mode 100644
index 000000000000..7d56dc9e7326
--- /dev/null
+++ b/net/mac80211/debugfs_key.c
@@ -0,0 +1,252 @@
+/*
+ * Copyright 2003-2005  Devicescape Software, Inc.
+ * Copyright (c) 2006   Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kobject.h>
+#include "ieee80211_i.h"
+#include "ieee80211_key.h"
+#include "debugfs.h"
+#include "debugfs_key.h"
+
+#define KEY_READ(name, buflen, format_string)                           \
+static ssize_t key_##name##_read(struct file *file,                     \
+                                 char __user *userbuf,                  \
+                                 size_t count, loff_t *ppos)            \
+{                                                                       \
+        char buf[buflen];                                               \
+        struct ieee80211_key *key = file->private_data;                 \
+        int res = scnprintf(buf, buflen, format_string, key->name);     \
+        return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
+}
+#define KEY_READ_D(name) KEY_READ(name, 20, "%d\n")
+
+#define KEY_OPS(name)                                                   \
+static const struct file_operations key_ ##name## _ops = {              \
+        .read = key_##name##_read,                                      \
+        .open = mac80211_open_file_generic,                             \
+}
+
+#define KEY_FILE(name, format)                                          \
+                 KEY_READ_##format(name)                                \
+                 KEY_OPS(name)
+
+KEY_FILE(keylen, D);
+KEY_FILE(force_sw_encrypt, D);
+KEY_FILE(keyidx, D);
+KEY_FILE(hw_key_idx, D);
+KEY_FILE(tx_rx_count, D);
+
+static ssize_t key_algorithm_read(struct file *file,
+                                  char __user *userbuf,
+                                  size_t count, loff_t *ppos)
+{
+        char *alg;
+        struct ieee80211_key *key = file->private_data;
+
+        switch (key->alg) {
+        case ALG_WEP:
+                alg = "WEP\n";
+                break;
+        case ALG_TKIP:
+                alg = "TKIP\n";
+                break;
+        case ALG_CCMP:
+                alg = "CCMP\n";
+                break;
+        default:
+                return 0;
+        }
+        return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
+}
+KEY_OPS(algorithm);
+
+static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
+                                size_t count, loff_t *ppos)
+{
+        const u8 *tpn;
+        char buf[20];
+        int len;
+        struct ieee80211_key *key = file->private_data;
+
+        switch (key->alg) {
+        case ALG_WEP:
+                len = scnprintf(buf, sizeof(buf), "\n");
+        case ALG_TKIP:
+                len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
+                                key->u.tkip.iv32,
+                                key->u.tkip.iv16);
+        case ALG_CCMP:
+                tpn = key->u.ccmp.tx_pn;
+                len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
+                                tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
+        default:
+                return 0;
+        }
+        return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(tx_spec);
+
+static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
+                                size_t count, loff_t *ppos)
+{
+        struct ieee80211_key *key = file->private_data;
+        char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
+        int i, len;
+        const u8 *rpn;
+
+        switch (key->alg) {
+        case ALG_WEP:
+                len = scnprintf(buf, sizeof(buf), "\n");
+        case ALG_TKIP:
+                for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
+                        p += scnprintf(p, sizeof(buf)+buf-p,
+                                       "%08x %04x\n",
+                                       key->u.tkip.iv32_rx[i],
+                                       key->u.tkip.iv16_rx[i]);
+                len = p - buf;
+        case ALG_CCMP:
+                for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
+                        rpn = key->u.ccmp.rx_pn[i];
+                        p += scnprintf(p, sizeof(buf)+buf-p,
+                                       "%02x%02x%02x%02x%02x%02x\n",
+                                       rpn[0], rpn[1], rpn[2],
+                                       rpn[3], rpn[4], rpn[5]);
+                }
+                len = p - buf;
+        default:
+                return 0;
+        }
+        return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(rx_spec);
+
+static ssize_t key_replays_read(struct file *file, char __user *userbuf,
+                                size_t count, loff_t *ppos)
+{
+        struct ieee80211_key *key = file->private_data;
+        char buf[20];
+        int len;
+
+        if (key->alg != ALG_CCMP)
+                return 0;
+        len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
+        return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(replays);
+
+static ssize_t key_key_read(struct file *file, char __user *userbuf,
+                            size_t count, loff_t *ppos)
+{
+        struct ieee80211_key *key = file->private_data;
+        int i, res, bufsize = 2*key->keylen+2;
+        char *buf = kmalloc(bufsize, GFP_KERNEL);
+        char *p = buf;
+
+        for (i = 0; i < key->keylen; i++)
+                p += scnprintf(p, bufsize+buf-p, "%02x", key->key[i]);
+        p += scnprintf(p, bufsize+buf-p, "\n");
+        res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+        kfree(buf);
+        return res;
+}
+KEY_OPS(key);
+
+#define DEBUGFS_ADD(name) \
+        key->debugfs.name = debugfs_create_file(#name, 0400,\
+                                key->debugfs.dir, key, &key_##name##_ops);
+
+void ieee80211_debugfs_key_add(struct ieee80211_local *local,
+                               struct ieee80211_key *key)
+{
+        char buf[20];
+
+        if (!local->debugfs.keys)
+                return;
+
+        sprintf(buf, "%d", key->keyidx);
+        key->debugfs.dir = debugfs_create_dir(buf,
+                                        local->debugfs.keys);
+
+        if (!key->debugfs.dir)
+                return;
+
+        DEBUGFS_ADD(keylen);
+        DEBUGFS_ADD(force_sw_encrypt);
+        DEBUGFS_ADD(keyidx);
+        DEBUGFS_ADD(hw_key_idx);
+        DEBUGFS_ADD(tx_rx_count);
+        DEBUGFS_ADD(algorithm);
+        DEBUGFS_ADD(tx_spec);
+        DEBUGFS_ADD(rx_spec);
+        DEBUGFS_ADD(replays);
+        DEBUGFS_ADD(key);
+};
+
+#define DEBUGFS_DEL(name) \
+        debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
+
+void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
+{
+        if (!key)
+                return;
+
+        DEBUGFS_DEL(keylen);
+        DEBUGFS_DEL(force_sw_encrypt);
+        DEBUGFS_DEL(keyidx);
+        DEBUGFS_DEL(hw_key_idx);
+        DEBUGFS_DEL(tx_rx_count);
+        DEBUGFS_DEL(algorithm);
+        DEBUGFS_DEL(tx_spec);
+        DEBUGFS_DEL(rx_spec);
+        DEBUGFS_DEL(replays);
+        DEBUGFS_DEL(key);
+
+        debugfs_remove(key->debugfs.stalink);
+        key->debugfs.stalink = NULL;
+        debugfs_remove(key->debugfs.dir);
+        key->debugfs.dir = NULL;
+}
+void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
+{
+        char buf[50];
+
+        if (!sdata->debugfsdir)
+                return;
+
+        sprintf(buf, "../keys/%d", sdata->default_key->keyidx);
+        sdata->debugfs.default_key =
+                debugfs_create_symlink("default_key", sdata->debugfsdir, buf);
+}
+void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
+{
+        if (!sdata)
+                return;
+
+        debugfs_remove(sdata->debugfs.default_key);
+        sdata->debugfs.default_key = NULL;
+}
+void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
+                                    struct sta_info *sta)
+{
+        char buf[50];
+
+        if (!key->debugfs.dir)
+                return;
+
+        sprintf(buf, "../sta/" MAC_FMT, MAC_ARG(sta->addr));
+        key->debugfs.stalink =
+                debugfs_create_symlink("station", key->debugfs.dir, buf);
+}
+
+void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
+                                   struct sta_info *sta)
+{
+        debugfs_remove(key->debugfs.stalink);
+        key->debugfs.stalink = NULL;
+}