mac80211: mesh statistics and config through debugfs

This patch contains the debugfs code for mesh statistics and configuration
parameters. Please note that generic support for r/w debugfs attributes has been
added.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 197 insertions, 0 deletions

diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 29f7b98ba1fb..107b0fe778d6 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -39,6 +39,29 @@ static ssize_t ieee80211_if_read(
         return ret;
 }
 
+#ifdef CONFIG_MAC80211_MESH
+static ssize_t ieee80211_if_write(
+        struct ieee80211_sub_if_data *sdata,
+        char const __user *userbuf,
+        size_t count, loff_t *ppos,
+        int (*format)(struct ieee80211_sub_if_data *, char *))
+{
+        char buf[10];
+        int buf_size;
+
+        memset(buf, 0x00, sizeof(buf));
+        buf_size = min(count, (sizeof(buf)-1));
+        read_lock(&dev_base_lock);
+        if (copy_from_user(buf, userbuf, buf_size))
+                goto endwrite;
+        if (sdata->dev->reg_state == NETREG_REGISTERED)
+                (*format)(sdata, buf);
+endwrite:
+        read_unlock(&dev_base_lock);
+        return count;
+}
+#endif
+
 #define IEEE80211_IF_FMT(name, field, format_string)                    \
 static ssize_t ieee80211_if_fmt_##name(                                 \
         const struct ieee80211_sub_if_data *sdata, char *buf,           \
@@ -46,6 +69,19 @@ static ssize_t ieee80211_if_fmt_##name(					\
 {                                                                       \
         return scnprintf(buf, buflen, format_string, sdata->field);     \
 }
+#define IEEE80211_IF_WFMT(name, field, type)                            \
+static int ieee80211_if_wfmt_##name(                                    \
+        struct ieee80211_sub_if_data *sdata, char *buf)                 \
+{                                                                       \
+        unsigned long tmp;                                              \
+        char *endp;                                                     \
+                                                                        \
+        tmp = simple_strtoul(buf, &endp, 0);                            \
+        if ((endp == buf) || ((type)tmp != tmp))                        \
+                return -EINVAL;                                         \
+        sdata->field = tmp;                                             \
+        return 0;                                                       \
+}
 #define IEEE80211_IF_FMT_DEC(name, field)                               \
                 IEEE80211_IF_FMT(name, field, "%d\n")
 #define IEEE80211_IF_FMT_HEX(name, field)                               \
@@ -88,6 +124,34 @@ static const struct file_operations name##_ops = {			\
                 IEEE80211_IF_FMT_##format(name, field)                  \
                 __IEEE80211_IF_FILE(name)
 
+#define __IEEE80211_IF_WFILE(name)                                      \
+static ssize_t ieee80211_if_read_##name(struct file *file,              \
+                                        char __user *userbuf,           \
+                                        size_t count, loff_t *ppos)     \
+{                                                                       \
+        return ieee80211_if_read(file->private_data,                    \
+                                 userbuf, count, ppos,                  \
+                                 ieee80211_if_fmt_##name);              \
+}                                                                       \
+static ssize_t ieee80211_if_write_##name(struct file *file,             \
+                                        const char __user *userbuf,     \
+                                        size_t count, loff_t *ppos)     \
+{                                                                       \
+        return ieee80211_if_write(file->private_data,                   \
+                                 userbuf, count, ppos,                  \
+                                 ieee80211_if_wfmt_##name);             \
+}                                                                       \
+static const struct file_operations name##_ops = {                      \
+        .read = ieee80211_if_read_##name,                               \
+        .write = ieee80211_if_write_##name,                             \
+        .open = mac80211_open_file_generic,                             \
+}
+
+#define IEEE80211_IF_WFILE(name, field, format, type)                   \
+                IEEE80211_IF_FMT_##format(name, field)                  \
+                IEEE80211_IF_WFMT(name, field, type)                    \
+                __IEEE80211_IF_WFILE(name)
+
 /* common attributes */
 IEEE80211_IF_FILE(channel_use, channel_use, DEC);
 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
@@ -106,6 +170,7 @@ IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
+IEEE80211_IF_FILE(num_beacons_sta, u.sta.num_beacons, DEC);
 
 static ssize_t ieee80211_if_fmt_flags(
         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
@@ -139,6 +204,42 @@ __IEEE80211_IF_FILE(num_buffered_multicast);
 /* WDS attributes */
 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 
+#ifdef CONFIG_MAC80211_MESH
+/* Mesh stats attributes */
+IEEE80211_IF_FILE(fwded_frames, u.sta.mshstats.fwded_frames, DEC);
+IEEE80211_IF_FILE(dropped_frames_ttl, u.sta.mshstats.dropped_frames_ttl, DEC);
+IEEE80211_IF_FILE(dropped_frames_no_route,
+                u.sta.mshstats.dropped_frames_no_route, DEC);
+IEEE80211_IF_FILE(estab_plinks, u.sta.mshstats.estab_plinks, ATOMIC);
+
+/* Mesh parameters */
+IEEE80211_IF_WFILE(dot11MeshMaxRetries,
+                u.sta.mshcfg.dot11MeshMaxRetries, DEC, u8);
+IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
+                u.sta.mshcfg.dot11MeshRetryTimeout, DEC, u16);
+IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
+                u.sta.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
+IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
+                u.sta.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
+IEEE80211_IF_WFILE(dot11MeshTTL, u.sta.mshcfg.dot11MeshTTL, DEC, u8);
+IEEE80211_IF_WFILE(auto_open_plinks, u.sta.mshcfg.auto_open_plinks, DEC, bool);
+IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
+                u.sta.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
+IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
+                u.sta.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
+IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
+                u.sta.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
+IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
+                u.sta.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
+IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
+                u.sta.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
+IEEE80211_IF_WFILE(path_refresh_time,
+                u.sta.mshcfg.path_refresh_time, DEC, u32);
+IEEE80211_IF_WFILE(min_discovery_timeout,
+                u.sta.mshcfg.min_discovery_timeout, DEC, u16);
+#endif
+
+
 #define DEBUGFS_ADD(name, type)\
         sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
                 sdata->debugfsdir, sdata, &name##_ops);
@@ -161,6 +262,7 @@ static void add_sta_files(struct ieee80211_sub_if_data *sdata)
         DEBUGFS_ADD(auth_alg, sta);
         DEBUGFS_ADD(auth_transaction, sta);
         DEBUGFS_ADD(flags, sta);
+        DEBUGFS_ADD(num_beacons_sta, sta);
 }
 
 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
@@ -192,12 +294,57 @@ static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 {
 }
 
+#ifdef CONFIG_MAC80211_MESH
+#define MESHSTATS_ADD(name)\
+        sdata->mesh_stats.name = debugfs_create_file(#name, 0444,\
+                sdata->mesh_stats_dir, sdata, &name##_ops);
+
+static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
+{
+        sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
+                                sdata->debugfsdir);
+        MESHSTATS_ADD(fwded_frames);
+        MESHSTATS_ADD(dropped_frames_ttl);
+        MESHSTATS_ADD(dropped_frames_no_route);
+        MESHSTATS_ADD(estab_plinks);
+}
+
+#define MESHPARAMS_ADD(name)\
+        sdata->mesh_config.name = debugfs_create_file(#name, 0644,\
+                sdata->mesh_config_dir, sdata, &name##_ops);
+
+static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
+{
+        sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
+                                sdata->debugfsdir);
+        MESHPARAMS_ADD(dot11MeshMaxRetries);
+        MESHPARAMS_ADD(dot11MeshRetryTimeout);
+        MESHPARAMS_ADD(dot11MeshConfirmTimeout);
+        MESHPARAMS_ADD(dot11MeshHoldingTimeout);
+        MESHPARAMS_ADD(dot11MeshTTL);
+        MESHPARAMS_ADD(auto_open_plinks);
+        MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
+        MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
+        MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
+        MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
+        MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
+        MESHPARAMS_ADD(path_refresh_time);
+        MESHPARAMS_ADD(min_discovery_timeout);
+}
+#endif
+
 static void add_files(struct ieee80211_sub_if_data *sdata)
 {
         if (!sdata->debugfsdir)
                 return;
 
         switch (sdata->vif.type) {
+        case IEEE80211_IF_TYPE_MESH_POINT:
+#ifdef CONFIG_MAC80211_MESH
+                add_mesh_stats(sdata);
+                add_mesh_config(sdata);
+#endif
+                /* fall through */
         case IEEE80211_IF_TYPE_STA:
         case IEEE80211_IF_TYPE_IBSS:
                 add_sta_files(sdata);
@@ -243,6 +390,7 @@ static void del_sta_files(struct ieee80211_sub_if_data *sdata)
         DEBUGFS_DEL(auth_alg, sta);
         DEBUGFS_DEL(auth_transaction, sta);
         DEBUGFS_DEL(flags, sta);
+        DEBUGFS_DEL(num_beacons_sta, sta);
 }
 
 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
@@ -274,12 +422,61 @@ static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
 {
 }
 
+#ifdef CONFIG_MAC80211_MESH
+#define MESHSTATS_DEL(name)                     \
+        do {                                            \
+                debugfs_remove(sdata->mesh_stats.name); \
+                sdata->mesh_stats.name = NULL;          \
+        } while (0)
+
+static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
+{
+        MESHSTATS_DEL(fwded_frames);
+        MESHSTATS_DEL(dropped_frames_ttl);
+        MESHSTATS_DEL(dropped_frames_no_route);
+        MESHSTATS_DEL(estab_plinks);
+        debugfs_remove(sdata->mesh_stats_dir);
+        sdata->mesh_stats_dir = NULL;
+}
+
+#define MESHPARAMS_DEL(name)                    \
+        do {                                            \
+                debugfs_remove(sdata->mesh_config.name);        \
+                sdata->mesh_config.name = NULL;         \
+        } while (0)
+
+static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
+{
+        MESHPARAMS_DEL(dot11MeshMaxRetries);
+        MESHPARAMS_DEL(dot11MeshRetryTimeout);
+        MESHPARAMS_DEL(dot11MeshConfirmTimeout);
+        MESHPARAMS_DEL(dot11MeshHoldingTimeout);
+        MESHPARAMS_DEL(dot11MeshTTL);
+        MESHPARAMS_DEL(auto_open_plinks);
+        MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
+        MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
+        MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
+        MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
+        MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
+        MESHPARAMS_DEL(path_refresh_time);
+        MESHPARAMS_DEL(min_discovery_timeout);
+        debugfs_remove(sdata->mesh_config_dir);
+        sdata->mesh_config_dir = NULL;
+}
+#endif
+
 static void del_files(struct ieee80211_sub_if_data *sdata, int type)
 {
         if (!sdata->debugfsdir)
                 return;
 
         switch (type) {
+        case IEEE80211_IF_TYPE_MESH_POINT:
+#ifdef CONFIG_MAC80211_MESH
+                del_mesh_stats(sdata);
+                del_mesh_config(sdata);
+#endif
+                /* fall through */
         case IEEE80211_IF_TYPE_STA:
         case IEEE80211_IF_TYPE_IBSS:
                 del_sta_files(sdata);