[commits] [batman-adv] master: batman-adv: Make sysfs support optional (c585c6ca)

postmaster at open-mesh.org postmaster at open-mesh.org
Thu Mar 28 17:21:05 CET 2019


Repository : ssh://git@open-mesh.org/batman-adv

On branch  : master

>---------------------------------------------------------------

commit c585c6ca3db0d82b53bc7e03dc68cdc68fa74cbf
Author: Sven Eckelmann <sven at narfation.org>
Date:   Sun Mar 3 18:02:57 2019 +0100

    batman-adv: Make sysfs support optional
    
    The sysfs files will be marked as deprecated in the near future. They are
    already replaced by the batadv generic netlink family. Add an Kconfig
    option to disable the sysfs support for users who want to test their tools
    or want to safe some space. This setting should currently still be enabled
    by default to keep backward compatible with legacy tools.
    
    Signed-off-by: Sven Eckelmann <sven at narfation.org>


>---------------------------------------------------------------

c585c6ca3db0d82b53bc7e03dc68cdc68fa74cbf
 Makefile                               |  3 ++
 README.external.rst                    |  1 +
 gen-compat-autoconf.sh                 |  3 +-
 net/batman-adv/Kconfig                 | 12 ++++++
 net/batman-adv/Makefile                |  2 +-
 net/batman-adv/bridge_loop_avoidance.c |  1 -
 net/batman-adv/gateway_client.c        |  1 -
 net/batman-adv/main.c                  | 73 ++++++++++++++++++++++++++++++++++
 net/batman-adv/main.h                  |  2 +
 net/batman-adv/sysfs.c                 | 70 --------------------------------
 net/batman-adv/sysfs.h                 | 38 +++++++++++++++++-
 11 files changed, 130 insertions(+), 76 deletions(-)

diff --git a/Makefile b/Makefile
index 3dfe2946..109d88a0 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,8 @@ export CONFIG_BATMAN_ADV_DAT=y
 export CONFIG_BATMAN_ADV_NC=n
 # B.A.T.M.A.N. multicast optimizations:
 export CONFIG_BATMAN_ADV_MCAST=y
+# B.A.T.M.A.N. sysfs support:
+export CONFIG_BATMAN_ADV_SYSFS=y
 # B.A.T.M.A.N. tracing support:
 export CONFIG_BATMAN_ADV_TRACING=n
 # B.A.T.M.A.N. V routing algorithm (experimental):
@@ -65,6 +67,7 @@ BUILD_FLAGS := \
 	CONFIG_BATMAN_ADV_DAT=$(CONFIG_BATMAN_ADV_DAT) \
 	CONFIG_BATMAN_ADV_NC=$(CONFIG_BATMAN_ADV_NC) \
 	CONFIG_BATMAN_ADV_MCAST=$(CONFIG_BATMAN_ADV_MCAST) \
+	CONFIG_BATMAN_ADV_SYSFS=$(CONFIG_BATMAN_ADV_SYSFS) \
 	CONFIG_BATMAN_ADV_TRACING=$(CONFIG_BATMAN_ADV_TRACING) \
 	CONFIG_BATMAN_ADV_BATMAN_V=$(CONFIG_BATMAN_ADV_BATMAN_V) \
 	INSTALL_MOD_DIR=updates/
diff --git a/README.external.rst b/README.external.rst
index e43902b4..57210cdf 100644
--- a/README.external.rst
+++ b/README.external.rst
@@ -49,6 +49,7 @@ module).  Available  options  and  their    possible   values are
  * ``CONFIG_BATMAN_ADV_DAT=[y*|n]`` (B.A.T.M.A.N. Distributed ARP Table)
  * ``CONFIG_BATMAN_ADV_MCAST=[y*|n]`` (B.A.T.M.A.N. multicast optimizations)
  * ``CONFIG_BATMAN_ADV_NC=[y|n*]`` (B.A.T.M.A.N. Network Coding)
+ * ``CONFIG_BATMAN_ADV_SYSFS=[y*|n]`` (B.A.T.M.A.N. sysfs support)
  * ``CONFIG_BATMAN_ADV_TRACING=[y|n*]`` (B.A.T.M.A.N. tracing support)
  * ``CONFIG_BATMAN_ADV_BATMAN_V=[y*|n]`` (B.A.T.M.A.N. V routing algorithm)
 
diff --git a/gen-compat-autoconf.sh b/gen-compat-autoconf.sh
index 0acda0f2..f877c8fe 100755
--- a/gen-compat-autoconf.sh
+++ b/gen-compat-autoconf.sh
@@ -46,7 +46,8 @@ gen_config 'CONFIG_BATMAN_ADV_BLA' ${CONFIG_BATMAN_ADV_BLA:="y"} >> "${TMP}"
 gen_config 'CONFIG_BATMAN_ADV_DAT' ${CONFIG_BATMAN_ADV_DAT:="y"} >> "${TMP}"
 gen_config 'CONFIG_BATMAN_ADV_MCAST' ${CONFIG_BATMAN_ADV_MCAST:="y"} >> "${TMP}"
 gen_config 'CONFIG_BATMAN_ADV_NC' ${CONFIG_BATMAN_ADV_NC:="n"} >> "${TMP}"
-gen_config 'CONFIG_BATMAN_ADV_TRACING' ${CONFIG_BATMAN_ADV_TRACING:="n"} >> "${TMP}"
+gen_config 'CONFIG_BATMAN_ADV_SYSFS' ${CONFIG_BATMAN_ADV_SYSFS:="n"} >> "${TMP}"
+gen_config 'CONFIG_BATMAN_ADV_TRACING' ${CONFIG_BATMAN_ADV_TRACING:="y"} >> "${TMP}"
 gen_config 'CONFIG_BATMAN_ADV_BATMAN_V' ${CONFIG_BATMAN_ADV_BATMAN_V:="y"} >> "${TMP}"
 
 # only regenerate compat-autoconf.h when config was changed
diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig
index 17595ec0..a3d188df 100644
--- a/net/batman-adv/Kconfig
+++ b/net/batman-adv/Kconfig
@@ -97,6 +97,18 @@ config BATMAN_ADV_DEBUG
 	  buffer. The output is controlled via the batadv netdev specific
 	  log_level setting.
 
+config BATMAN_ADV_SYSFS
+	bool "batman-adv sysfs entries"
+	depends on BATMAN_ADV
+	default y
+	help
+	  Say Y here if you want to enable batman-adv device configuration and
+	  status interface through sysfs attributes. It is replaced by the
+	  batadv generic netlink family but still used by various userspace
+	  tools and scripts.
+
+	  If unsure, say Y.
+
 config BATMAN_ADV_TRACING
 	bool "B.A.T.M.A.N. tracing support"
 	depends on BATMAN_ADV
diff --git a/net/batman-adv/Makefile b/net/batman-adv/Makefile
index 1bf7acfe..fd63e116 100644
--- a/net/batman-adv/Makefile
+++ b/net/batman-adv/Makefile
@@ -28,7 +28,7 @@ batman-adv-y += originator.o
 batman-adv-y += routing.o
 batman-adv-y += send.o
 batman-adv-y += soft-interface.o
-batman-adv-y += sysfs.o
+batman-adv-$(CONFIG_BATMAN_ADV_SYSFS) += sysfs.o
 batman-adv-$(CONFIG_BATMAN_ADV_TRACING) += trace.o
 batman-adv-y += tp_meter.o
 batman-adv-y += translation-table.o
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 5ce8b719..663a53b6 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -47,7 +47,6 @@
 #include "netlink.h"
 #include "originator.h"
 #include "soft-interface.h"
-#include "sysfs.h"
 #include "translation-table.h"
 
 static const u8 batadv_announce_mac[4] = {0x43, 0x05, 0x43, 0x05};
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index be63d670..47df4c67 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -41,7 +41,6 @@
 #include "originator.h"
 #include "routing.h"
 #include "soft-interface.h"
-#include "sysfs.h"
 #include "translation-table.h"
 
 /* These are the offsets of the "hw type" and "hw address length" in the dhcp
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 33b9b38b..dabcaff8 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -10,6 +10,7 @@
 #include <linux/build_bug.h>
 #include <linux/byteorder/generic.h>
 #include <linux/crc32c.h>
+#include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/genetlink.h>
 #include <linux/gfp.h>
@@ -19,6 +20,7 @@
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <linux/kernel.h>
+#include <linux/kobject.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/module.h>
@@ -28,6 +30,7 @@
 #include <linux/rcupdate.h>
 #include <linux/seq_file.h>
 #include <linux/skbuff.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/stddef.h>
 #include <linux/string.h>
@@ -72,6 +75,22 @@ struct workqueue_struct *batadv_event_workqueue;
 
 static void batadv_recv_handler_init(void);
 
+#define BATADV_UEV_TYPE_VAR	"BATTYPE="
+#define BATADV_UEV_ACTION_VAR	"BATACTION="
+#define BATADV_UEV_DATA_VAR	"BATDATA="
+
+static char *batadv_uev_action_str[] = {
+	"add",
+	"del",
+	"change",
+	"loopdetect",
+};
+
+static char *batadv_uev_type_str[] = {
+	"gw",
+	"bla",
+};
+
 static int __init batadv_init(void)
 {
 	int ret;
@@ -666,6 +685,60 @@ bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid)
 	return ap_isolation_enabled;
 }
 
+/**
+ * batadv_throw_uevent() - Send an uevent with batman-adv specific env data
+ * @bat_priv: the bat priv with all the soft interface information
+ * @type: subsystem type of event. Stored in uevent's BATTYPE
+ * @action: action type of event. Stored in uevent's BATACTION
+ * @data: string with additional information to the event (ignored for
+ *  BATADV_UEV_DEL). Stored in uevent's BATDATA
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
+			enum batadv_uev_action action, const char *data)
+{
+	int ret = -ENOMEM;
+	struct kobject *bat_kobj;
+	char *uevent_env[4] = { NULL, NULL, NULL, NULL };
+
+	bat_kobj = &bat_priv->soft_iface->dev.kobj;
+
+	uevent_env[0] = kasprintf(GFP_ATOMIC,
+				  "%s%s", BATADV_UEV_TYPE_VAR,
+				  batadv_uev_type_str[type]);
+	if (!uevent_env[0])
+		goto out;
+
+	uevent_env[1] = kasprintf(GFP_ATOMIC,
+				  "%s%s", BATADV_UEV_ACTION_VAR,
+				  batadv_uev_action_str[action]);
+	if (!uevent_env[1])
+		goto out;
+
+	/* If the event is DEL, ignore the data field */
+	if (action != BATADV_UEV_DEL) {
+		uevent_env[2] = kasprintf(GFP_ATOMIC,
+					  "%s%s", BATADV_UEV_DATA_VAR, data);
+		if (!uevent_env[2])
+			goto out;
+	}
+
+	ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
+out:
+	kfree(uevent_env[0]);
+	kfree(uevent_env[1]);
+	kfree(uevent_env[2]);
+
+	if (ret)
+		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+			   "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
+			   batadv_uev_type_str[type],
+			   batadv_uev_action_str[action],
+			   (action == BATADV_UEV_DEL ? "NULL" : data), ret);
+	return ret;
+}
+
 module_init(batadv_init);
 module_exit(batadv_exit);
 
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 7973993a..c59afcba 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -382,5 +382,7 @@ static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx,
 
 unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len);
 bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid);
+int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
+			enum batadv_uev_action action, const char *data);
 
 #endif /* _NET_BATMAN_ADV_MAIN_H_ */
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index 4a4c4aa3..a8abda02 100644
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -102,22 +102,6 @@ batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
 	return vlan;
 }
 
-#define BATADV_UEV_TYPE_VAR	"BATTYPE="
-#define BATADV_UEV_ACTION_VAR	"BATACTION="
-#define BATADV_UEV_DATA_VAR	"BATDATA="
-
-static char *batadv_uev_action_str[] = {
-	"add",
-	"del",
-	"change",
-	"loopdetect",
-};
-
-static char *batadv_uev_type_str[] = {
-	"gw",
-	"bla",
-};
-
 /* Use this, if you have customized show and store functions for vlan attrs */
 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)	\
 struct batadv_attribute batadv_attr_vlan_##_name = {	\
@@ -1238,57 +1222,3 @@ void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 	kobject_put(*hardif_obj);
 	*hardif_obj = NULL;
 }
-
-/**
- * batadv_throw_uevent() - Send an uevent with batman-adv specific env data
- * @bat_priv: the bat priv with all the soft interface information
- * @type: subsystem type of event. Stored in uevent's BATTYPE
- * @action: action type of event. Stored in uevent's BATACTION
- * @data: string with additional information to the event (ignored for
- *  BATADV_UEV_DEL). Stored in uevent's BATDATA
- *
- * Return: 0 on success or negative error number in case of failure
- */
-int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
-			enum batadv_uev_action action, const char *data)
-{
-	int ret = -ENOMEM;
-	struct kobject *bat_kobj;
-	char *uevent_env[4] = { NULL, NULL, NULL, NULL };
-
-	bat_kobj = &bat_priv->soft_iface->dev.kobj;
-
-	uevent_env[0] = kasprintf(GFP_ATOMIC,
-				  "%s%s", BATADV_UEV_TYPE_VAR,
-				  batadv_uev_type_str[type]);
-	if (!uevent_env[0])
-		goto out;
-
-	uevent_env[1] = kasprintf(GFP_ATOMIC,
-				  "%s%s", BATADV_UEV_ACTION_VAR,
-				  batadv_uev_action_str[action]);
-	if (!uevent_env[1])
-		goto out;
-
-	/* If the event is DEL, ignore the data field */
-	if (action != BATADV_UEV_DEL) {
-		uevent_env[2] = kasprintf(GFP_ATOMIC,
-					  "%s%s", BATADV_UEV_DATA_VAR, data);
-		if (!uevent_env[2])
-			goto out;
-	}
-
-	ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
-out:
-	kfree(uevent_env[0]);
-	kfree(uevent_env[1]);
-	kfree(uevent_env[2]);
-
-	if (ret)
-		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
-			   "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
-			   batadv_uev_type_str[type],
-			   batadv_uev_action_str[action],
-			   (action == BATADV_UEV_DEL ? "NULL" : data), ret);
-	return ret;
-}
diff --git a/net/batman-adv/sysfs.h b/net/batman-adv/sysfs.h
index 2d13f59e..83fa808b 100644
--- a/net/batman-adv/sysfs.h
+++ b/net/batman-adv/sysfs.h
@@ -45,6 +45,8 @@ struct batadv_attribute {
 			 char *buf, size_t count);
 };
 
+#ifdef CONFIG_BATMAN_ADV_SYSFS
+
 int batadv_sysfs_add_meshif(struct net_device *dev);
 void batadv_sysfs_del_meshif(struct net_device *dev);
 int batadv_sysfs_add_hardif(struct kobject **hardif_obj,
@@ -54,7 +56,39 @@ int batadv_sysfs_add_vlan(struct net_device *dev,
 			  struct batadv_softif_vlan *vlan);
 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 			   struct batadv_softif_vlan *vlan);
-int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
-			enum batadv_uev_action action, const char *data);
+
+#else
+
+static inline int batadv_sysfs_add_meshif(struct net_device *dev)
+{
+	return 0;
+}
+
+static inline void batadv_sysfs_del_meshif(struct net_device *dev)
+{
+}
+
+static inline int batadv_sysfs_add_hardif(struct kobject **hardif_obj,
+					  struct net_device *dev)
+{
+	return 0;
+}
+
+static inline void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
+{
+}
+
+static inline int batadv_sysfs_add_vlan(struct net_device *dev,
+					struct batadv_softif_vlan *vlan)
+{
+	return 0;
+}
+
+static inline void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
+					 struct batadv_softif_vlan *vlan)
+{
+}
+
+#endif
 
 #endif /* _NET_BATMAN_ADV_SYSFS_H_ */



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