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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/net/batman-adv/main.c
....@@ -1,19 +1,7 @@
11 // SPDX-License-Identifier: GPL-2.0
2
-/* Copyright (C) 2007-2018  B.A.T.M.A.N. contributors:
2
+/* Copyright (C) 2007-2020  B.A.T.M.A.N. contributors:
33  *
44  * Marek Lindner, Simon Wunderlich
5
- *
6
- * This program is free software; you can redistribute it and/or
7
- * modify it under the terms of version 2 of the GNU General Public
8
- * License as published by the Free Software Foundation.
9
- *
10
- * This program is distributed in the hope that it will be useful, but
11
- * WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
- * General Public License for more details.
14
- *
15
- * You should have received a copy of the GNU General Public License
16
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
175  */
186 
197 #include "main.h"
....@@ -22,6 +10,7 @@
2210 #include <linux/build_bug.h>
2311 #include <linux/byteorder/generic.h>
2412 #include <linux/crc32c.h>
13
+#include <linux/device.h>
2514 #include <linux/errno.h>
2615 #include <linux/genetlink.h>
2716 #include <linux/gfp.h>
....@@ -31,6 +20,7 @@
3120 #include <linux/ip.h>
3221 #include <linux/ipv6.h>
3322 #include <linux/kernel.h>
23
+#include <linux/kobject.h>
3424 #include <linux/kref.h>
3525 #include <linux/list.h>
3626 #include <linux/module.h>
....@@ -40,6 +30,7 @@
4030 #include <linux/rcupdate.h>
4131 #include <linux/seq_file.h>
4232 #include <linux/skbuff.h>
33
+#include <linux/slab.h>
4334 #include <linux/spinlock.h>
4435 #include <linux/stddef.h>
4536 #include <linux/string.h>
....@@ -74,6 +65,7 @@
7465  * list traversals just rcu-locked
7566  */
7667 struct list_head batadv_hardif_list;
68
+unsigned int batadv_hardif_generation;
7769 static int (*batadv_rx_handler[256])(struct sk_buff *skb,
7870 				     struct batadv_hard_iface *recv_if);
7971 
....@@ -82,6 +74,22 @@
8274 struct workqueue_struct *batadv_event_workqueue;
8375 
8476 static void batadv_recv_handler_init(void);
77
+
78
+#define BATADV_UEV_TYPE_VAR	"BATTYPE="
79
+#define BATADV_UEV_ACTION_VAR	"BATACTION="
80
+#define BATADV_UEV_DATA_VAR	"BATDATA="
81
+
82
+static char *batadv_uev_action_str[] = {
83
+	"add",
84
+	"del",
85
+	"change",
86
+	"loopdetect",
87
+};
88
+
89
+static char *batadv_uev_type_str[] = {
90
+	"gw",
91
+	"bla",
92
+};
8593 
8694 static int __init batadv_init(void)
8795 {
....@@ -129,7 +137,6 @@
129137 	batadv_netlink_unregister();
130138 	rtnl_link_unregister(&batadv_link_ops);
131139 	unregister_netdevice_notifier(&batadv_hard_if_notifier);
132
-	batadv_hardif_remove_interfaces();
133140 
134141 	flush_workqueue(batadv_event_workqueue);
135142 	destroy_workqueue(batadv_event_workqueue);
....@@ -186,6 +193,8 @@
186193 	INIT_HLIST_HEAD(&bat_priv->tvlv.handler_list);
187194 	INIT_HLIST_HEAD(&bat_priv->softif_vlan_list);
188195 	INIT_HLIST_HEAD(&bat_priv->tp_list);
196
+
197
+	bat_priv->gw.generation = 0;
189198 
190199 	ret = batadv_originator_init(bat_priv);
191200 	if (ret < 0) {
....@@ -562,7 +571,7 @@
562571 	BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_change) != 12);
563572 	BUILD_BUG_ON(sizeof(struct batadv_tvlv_roam_adv) != 8);
564573 
565
-	i = FIELD_SIZEOF(struct sk_buff, cb);
574
+	i = sizeof_field(struct sk_buff, cb);
566575 	BUILD_BUG_ON(sizeof(struct batadv_skb_cb) > i);
567576 
568577 	/* broadcast packet */
....@@ -680,7 +689,7 @@
680689  * @vid: the VLAN identifier for which the AP isolation attributed as to be
681690  *  looked up
682691  *
683
- * Return: true if AP isolation is on for the VLAN idenfied by vid, false
692
+ * Return: true if AP isolation is on for the VLAN identified by vid, false
684693  * otherwise
685694  */
686695 bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid)
....@@ -700,6 +709,60 @@
700709 	return ap_isolation_enabled;
701710 }
702711 
712
+/**
713
+ * batadv_throw_uevent() - Send an uevent with batman-adv specific env data
714
+ * @bat_priv: the bat priv with all the soft interface information
715
+ * @type: subsystem type of event. Stored in uevent's BATTYPE
716
+ * @action: action type of event. Stored in uevent's BATACTION
717
+ * @data: string with additional information to the event (ignored for
718
+ *  BATADV_UEV_DEL). Stored in uevent's BATDATA
719
+ *
720
+ * Return: 0 on success or negative error number in case of failure
721
+ */
722
+int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
723
+			enum batadv_uev_action action, const char *data)
724
+{
725
+	int ret = -ENOMEM;
726
+	struct kobject *bat_kobj;
727
+	char *uevent_env[4] = { NULL, NULL, NULL, NULL };
728
+
729
+	bat_kobj = &bat_priv->soft_iface->dev.kobj;
730
+
731
+	uevent_env[0] = kasprintf(GFP_ATOMIC,
732
+				  "%s%s", BATADV_UEV_TYPE_VAR,
733
+				  batadv_uev_type_str[type]);
734
+	if (!uevent_env[0])
735
+		goto out;
736
+
737
+	uevent_env[1] = kasprintf(GFP_ATOMIC,
738
+				  "%s%s", BATADV_UEV_ACTION_VAR,
739
+				  batadv_uev_action_str[action]);
740
+	if (!uevent_env[1])
741
+		goto out;
742
+
743
+	/* If the event is DEL, ignore the data field */
744
+	if (action != BATADV_UEV_DEL) {
745
+		uevent_env[2] = kasprintf(GFP_ATOMIC,
746
+					  "%s%s", BATADV_UEV_DATA_VAR, data);
747
+		if (!uevent_env[2])
748
+			goto out;
749
+	}
750
+
751
+	ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
752
+out:
753
+	kfree(uevent_env[0]);
754
+	kfree(uevent_env[1]);
755
+	kfree(uevent_env[2]);
756
+
757
+	if (ret)
758
+		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
759
+			   "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
760
+			   batadv_uev_type_str[type],
761
+			   batadv_uev_action_str[action],
762
+			   (action == BATADV_UEV_DEL ? "NULL" : data), ret);
763
+	return ret;
764
+}
765
+
703766 module_init(batadv_init);
704767 module_exit(batadv_exit);
705768