1 files changed, 49 insertions, 11 deletions

diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c
index 391d4fb2026f..6f58ddd53bff 100644
--- a/net/batman-adv/debugfs.c
+++ b/net/batman-adv/debugfs.c
@@ -31,6 +31,7 @@
 #include "vis.h"
 #include "icmp_socket.h"
 #include "bridge_loop_avoidance.h"
+#include "distributed-arp-table.h"
 
 static struct dentry *batadv_debugfs;
 
@@ -99,15 +100,17 @@ int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
 
 static int batadv_log_open(struct inode *inode, struct file *file)
 {
+        if (!try_module_get(THIS_MODULE))
+                return -EBUSY;
+
         nonseekable_open(inode, file);
         file->private_data = inode->i_private;
-        batadv_inc_module_count();
         return 0;
 }
 
 static int batadv_log_release(struct inode *inode, struct file *file)
 {
-        batadv_dec_module_count();
+        module_put(THIS_MODULE);
         return 0;
 }
 
@@ -278,6 +281,19 @@ static int batadv_bla_backbone_table_open(struct inode *inode,
 
 #endif
 
+#ifdef CONFIG_BATMAN_ADV_DAT
+/**
+ * batadv_dat_cache_open - Prepare file handler for reads from dat_chache
+ * @inode: inode which was opened
+ * @file: file handle to be initialized
+ */
+static int batadv_dat_cache_open(struct inode *inode, struct file *file)
+{
+        struct net_device *net_dev = (struct net_device *)inode->i_private;
+        return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
+}
+#endif
+
 static int batadv_transtable_local_open(struct inode *inode, struct file *file)
 {
         struct net_device *net_dev = (struct net_device *)inode->i_private;
@@ -307,7 +323,17 @@ struct batadv_debuginfo batadv_debuginfo_##_name = {	\
                 }                                       \
 };
 
+/* the following attributes are general and therefore they will be directly
+ * placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
+ */
 static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);
+
+static struct batadv_debuginfo *batadv_general_debuginfos[] = {
+        &batadv_debuginfo_routing_algos,
+        NULL,
+};
+
+/* The following attributes are per soft interface */
 static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
 static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
 static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
@@ -317,6 +343,9 @@ static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
 static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
                         batadv_bla_backbone_table_open);
 #endif
+#ifdef CONFIG_BATMAN_ADV_DAT
+static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
+#endif
 static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
                         batadv_transtable_local_open);
 static BATADV_DEBUGINFO(vis_data, S_IRUGO, batadv_vis_data_open);
@@ -329,6 +358,9 @@ static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
         &batadv_debuginfo_bla_claim_table,
         &batadv_debuginfo_bla_backbone_table,
 #endif
+#ifdef CONFIG_BATMAN_ADV_DAT
+        &batadv_debuginfo_dat_cache,
+#endif
         &batadv_debuginfo_transtable_local,
         &batadv_debuginfo_vis_data,
         NULL,
@@ -336,7 +368,7 @@ static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
 
 void batadv_debugfs_init(void)
 {
-        struct batadv_debuginfo *bat_debug;
+        struct batadv_debuginfo **bat_debug;
         struct dentry *file;
 
         batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
@@ -344,17 +376,23 @@ void batadv_debugfs_init(void)
                 batadv_debugfs = NULL;
 
         if (!batadv_debugfs)
-                goto out;
+                goto err;
 
-        bat_debug = &batadv_debuginfo_routing_algos;
-        file = debugfs_create_file(bat_debug->attr.name,
-                                   S_IFREG | bat_debug->attr.mode,
-                                   batadv_debugfs, NULL, &bat_debug->fops);
-        if (!file)
-                pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name);
+        for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
+                file = debugfs_create_file(((*bat_debug)->attr).name,
+                                           S_IFREG | ((*bat_debug)->attr).mode,
+                                           batadv_debugfs, NULL,
+                                           &(*bat_debug)->fops);
+                if (!file) {
+                        pr_err("Can't add general debugfs file: %s\n",
+                               ((*bat_debug)->attr).name);
+                        goto err;
+                }
+        }
 
-out:
         return;
+err:
+        debugfs_remove_recursive(batadv_debugfs);
 }
 
 void batadv_debugfs_destroy(void)