[PATCH 0/3] batman-adv: Drop ununused functions and localize when possible

[PATCH 0/3] batman-adv: Drop ununused functions and localize when possible

[Sven Eckelmann]

There were a couple of functions which were still compiled but not used
anymore since a while. Just drop them and make sure that other ones are
local only (to make it easier to spot them in the future).

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
Sven Eckelmann (3):
      batman-adv: Drop unused function batadv_gw_bandwidth_set
      batman-adv: Keep batadv_netlink_notify_* static
      batman-adv: Drop per algo GW section class code

 net/batman-adv/bat_iv_ogm.c     |   1 +
 net/batman-adv/bat_v.c          |  23 +-----
 net/batman-adv/gateway_common.c | 162 +---------------------------------------
 net/batman-adv/gateway_common.h |   7 --
 net/batman-adv/netlink.c        |  15 ++--
 net/batman-adv/netlink.h        |   6 --
 net/batman-adv/types.h          |   7 +-
 7 files changed, 13 insertions(+), 208 deletions(-)
---
base-commit: ed12d0c16556942c4fd52af122030182c11e60ef
change-id: 20230802-cleanup_functions-2946498ebebc

Best regards,
-- 
Sven Eckelmann <sven@narfation.org>

[PATCH 1/3] batman-adv: Drop unused function batadv_gw_bandwidth_set

[Sven Eckelmann]

This function is no longer used since the sysfs support was removed from
batman-adv.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
 net/batman-adv/gateway_common.c | 88 -----------------------------------------
 net/batman-adv/gateway_common.h |  2 -
 2 files changed, 90 deletions(-)

diff --git a/net/batman-adv/gateway_common.c b/net/batman-adv/gateway_common.c
index 6a964a77..d9632607 100644
--- a/net/batman-adv/gateway_common.c
+++ b/net/batman-adv/gateway_common.c
@@ -9,7 +9,6 @@
 
 #include <linux/atomic.h>
 #include <linux/byteorder/generic.h>
-#include <linux/errno.h>
 #include <linux/kstrtox.h>
 #include <linux/limits.h>
 #include <linux/math64.h>
@@ -90,42 +89,6 @@ bool batadv_parse_throughput(struct net_device *net_dev, char *buff,
 	return true;
 }
 
-/**
- * batadv_parse_gw_bandwidth() - parse supplied string buffer to extract
- *  download and upload bandwidth information
- * @net_dev: the soft interface net device
- * @buff: string buffer to parse
- * @down: pointer holding the returned download bandwidth information
- * @up: pointer holding the returned upload bandwidth information
- *
- * Return: false on parse error and true otherwise.
- */
-static bool batadv_parse_gw_bandwidth(struct net_device *net_dev, char *buff,
-				      u32 *down, u32 *up)
-{
-	char *slash_ptr;
-	bool ret;
-
-	slash_ptr = strchr(buff, '/');
-	if (slash_ptr)
-		*slash_ptr = 0;
-
-	ret = batadv_parse_throughput(net_dev, buff, "download gateway speed",
-				      down);
-	if (!ret)
-		return false;
-
-	/* we also got some upload info */
-	if (slash_ptr) {
-		ret = batadv_parse_throughput(net_dev, slash_ptr + 1,
-					      "upload gateway speed", up);
-		if (!ret)
-			return false;
-	}
-
-	return true;
-}
-
 /**
  * batadv_gw_tvlv_container_update() - update the gw tvlv container after
  *  gateway setting change
@@ -155,57 +118,6 @@ void batadv_gw_tvlv_container_update(struct batadv_priv *bat_priv)
 	}
 }
 
-/**
- * batadv_gw_bandwidth_set() - Parse and set download/upload gateway bandwidth
- *  from supplied string buffer
- * @net_dev: netdev struct of the soft interface
- * @buff: the buffer containing the user data
- * @count: number of bytes in the buffer
- *
- * Return: 'count' on success or a negative error code in case of failure
- */
-ssize_t batadv_gw_bandwidth_set(struct net_device *net_dev, char *buff,
-				size_t count)
-{
-	struct batadv_priv *bat_priv = netdev_priv(net_dev);
-	u32 down_curr;
-	u32 up_curr;
-	u32 down_new = 0;
-	u32 up_new = 0;
-	bool ret;
-
-	down_curr = (unsigned int)atomic_read(&bat_priv->gw.bandwidth_down);
-	up_curr = (unsigned int)atomic_read(&bat_priv->gw.bandwidth_up);
-
-	ret = batadv_parse_gw_bandwidth(net_dev, buff, &down_new, &up_new);
-	if (!ret)
-		return -EINVAL;
-
-	if (!down_new)
-		down_new = 1;
-
-	if (!up_new)
-		up_new = down_new / 5;
-
-	if (!up_new)
-		up_new = 1;
-
-	if (down_curr == down_new && up_curr == up_new)
-		return count;
-
-	batadv_gw_reselect(bat_priv);
-	batadv_info(net_dev,
-		    "Changing gateway bandwidth from: '%u.%u/%u.%u MBit' to: '%u.%u/%u.%u MBit'\n",
-		    down_curr / 10, down_curr % 10, up_curr / 10, up_curr % 10,
-		    down_new / 10, down_new % 10, up_new / 10, up_new % 10);
-
-	atomic_set(&bat_priv->gw.bandwidth_down, down_new);
-	atomic_set(&bat_priv->gw.bandwidth_up, up_new);
-	batadv_gw_tvlv_container_update(bat_priv);
-
-	return count;
-}
-
 /**
  * batadv_gw_tvlv_ogm_handler_v1() - process incoming gateway tvlv container
  * @bat_priv: the bat priv with all the soft interface information
diff --git a/net/batman-adv/gateway_common.h b/net/batman-adv/gateway_common.h
index 87c37f90..cb2e72d7 100644
--- a/net/batman-adv/gateway_common.h
+++ b/net/batman-adv/gateway_common.h
@@ -27,8 +27,6 @@ enum batadv_bandwidth_units {
 #define BATADV_GW_MODE_CLIENT_NAME	"client"
 #define BATADV_GW_MODE_SERVER_NAME	"server"
 
-ssize_t batadv_gw_bandwidth_set(struct net_device *net_dev, char *buff,
-				size_t count);
 void batadv_gw_tvlv_container_update(struct batadv_priv *bat_priv);
 void batadv_gw_init(struct batadv_priv *bat_priv);
 void batadv_gw_free(struct batadv_priv *bat_priv);

-- 
2.39.2

[PATCH 2/3] batman-adv: Keep batadv_netlink_notify_* static

[Sven Eckelmann]

The batadv_netlink_notify_*() functions are not used by any other source
file. Just keep them local to netlink.c to get informed by the compiler
when they are not used anymore.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
 net/batman-adv/netlink.c | 10 +++++-----
 net/batman-adv/netlink.h |  6 ------
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 07f21cdb..09b76b0f 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -377,7 +377,7 @@ static int batadv_netlink_mesh_fill(struct sk_buff *msg,
  *
  * Return: 0 on success, < 0 on error
  */
-int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
+static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
 {
 	struct sk_buff *msg;
 	int ret;
@@ -858,8 +858,8 @@ static int batadv_netlink_hardif_fill(struct sk_buff *msg,
  *
  * Return: 0 on success, < 0 on error
  */
-int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
-				 struct batadv_hard_iface *hard_iface)
+static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
+					struct batadv_hard_iface *hard_iface)
 {
 	struct sk_buff *msg;
 	int ret;
@@ -1073,8 +1073,8 @@ static int batadv_netlink_vlan_fill(struct sk_buff *msg,
  *
  * Return: 0 on success, < 0 on error
  */
-int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
-			       struct batadv_softif_vlan *vlan)
+static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
+				      struct batadv_softif_vlan *vlan)
 {
 	struct sk_buff *msg;
 	int ret;
diff --git a/net/batman-adv/netlink.h b/net/batman-adv/netlink.h
index 48102cc7..876d2806 100644
--- a/net/batman-adv/netlink.h
+++ b/net/batman-adv/netlink.h
@@ -21,12 +21,6 @@ int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
 				  u8 result, u32 test_time, u64 total_bytes,
 				  u32 cookie);
 
-int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv);
-int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
-				 struct batadv_hard_iface *hard_iface);
-int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
-			       struct batadv_softif_vlan *vlan);
-
 extern struct genl_family batadv_netlink_family;
 
 #endif /* _NET_BATMAN_ADV_NETLINK_H_ */

-- 
2.39.2

[PATCH 3/3] batman-adv: Drop per algo GW section class code

[Sven Eckelmann]

This code was  only used in the past for the sysfs interface. But since
this was replace with netlink, it was never executed. The function pointer
was only checked to figure out whether the limit 255 (B.A.T.M.A.N. IV) or
2**32-1 (B.A.T.M.A.N. V) should be used as limit.

So instead of keeping the function pointer, just store the limits directly
in struct batadv_algo_gw_ops.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
 net/batman-adv/bat_iv_ogm.c     |  1 +
 net/batman-adv/bat_v.c          | 23 ++-----------
 net/batman-adv/gateway_common.c | 74 +----------------------------------------
 net/batman-adv/gateway_common.h |  5 ---
 net/batman-adv/netlink.c        |  5 +--
 net/batman-adv/types.h          |  7 ++--
 6 files changed, 8 insertions(+), 107 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 828fb393..74b49c35 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -2516,6 +2516,7 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
 	},
 	.gw = {
 		.init_sel_class = batadv_iv_init_sel_class,
+		.sel_class_max = BATADV_TQ_MAX_VALUE,
 		.get_best_gw_node = batadv_iv_gw_get_best_gw_node,
 		.is_eligible = batadv_iv_gw_is_eligible,
 		.dump = batadv_iv_gw_dump,
diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c
index 54e41fc7..ac11f1f0 100644
--- a/net/batman-adv/bat_v.c
+++ b/net/batman-adv/bat_v.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include <linux/kref.h>
+#include <linux/limits.h>
 #include <linux/list.h>
 #include <linux/minmax.h>
 #include <linux/netdevice.h>
@@ -34,7 +35,6 @@
 #include "bat_v_elp.h"
 #include "bat_v_ogm.h"
 #include "gateway_client.h"
-#include "gateway_common.h"
 #include "hard-interface.h"
 #include "hash.h"
 #include "log.h"
@@ -512,25 +512,6 @@ static void batadv_v_init_sel_class(struct batadv_priv *bat_priv)
 	atomic_set(&bat_priv->gw.sel_class, 50);
 }
 
-static ssize_t batadv_v_store_sel_class(struct batadv_priv *bat_priv,
-					char *buff, size_t count)
-{
-	u32 old_class, class;
-
-	if (!batadv_parse_throughput(bat_priv->soft_iface, buff,
-				     "B.A.T.M.A.N. V GW selection class",
-				     &class))
-		return -EINVAL;
-
-	old_class = atomic_read(&bat_priv->gw.sel_class);
-	atomic_set(&bat_priv->gw.sel_class, class);
-
-	if (old_class != class)
-		batadv_gw_reselect(bat_priv);
-
-	return count;
-}
-
 /**
  * batadv_v_gw_throughput_get() - retrieve the GW-bandwidth for a given GW
  * @gw_node: the GW to retrieve the metric for
@@ -818,7 +799,7 @@ static struct batadv_algo_ops batadv_batman_v __read_mostly = {
 	},
 	.gw = {
 		.init_sel_class = batadv_v_init_sel_class,
-		.store_sel_class = batadv_v_store_sel_class,
+		.sel_class_max = U32_MAX,
 		.get_best_gw_node = batadv_v_gw_get_best_gw_node,
 		.is_eligible = batadv_v_gw_is_eligible,
 		.dump = batadv_v_gw_dump,
diff --git a/net/batman-adv/gateway_common.c b/net/batman-adv/gateway_common.c
index d9632607..2dd36ef0 100644
--- a/net/batman-adv/gateway_common.c
+++ b/net/batman-adv/gateway_common.c
@@ -9,86 +9,14 @@
 
 #include <linux/atomic.h>
 #include <linux/byteorder/generic.h>
-#include <linux/kstrtox.h>
-#include <linux/limits.h>
-#include <linux/math64.h>
-#include <linux/netdevice.h>
 #include <linux/stddef.h>
-#include <linux/string.h>
+#include <linux/types.h>
 #include <uapi/linux/batadv_packet.h>
 #include <uapi/linux/batman_adv.h>
 
 #include "gateway_client.h"
-#include "log.h"
 #include "tvlv.h"
 
-/**
- * batadv_parse_throughput() - parse supplied string buffer to extract
- *  throughput information
- * @net_dev: the soft interface net device
- * @buff: string buffer to parse
- * @description: text shown when throughput string cannot be parsed
- * @throughput: pointer holding the returned throughput information
- *
- * Return: false on parse error and true otherwise.
- */
-bool batadv_parse_throughput(struct net_device *net_dev, char *buff,
-			     const char *description, u32 *throughput)
-{
-	enum batadv_bandwidth_units bw_unit_type = BATADV_BW_UNIT_KBIT;
-	u64 lthroughput;
-	char *tmp_ptr;
-	int ret;
-
-	if (strlen(buff) > 4) {
-		tmp_ptr = buff + strlen(buff) - 4;
-
-		if (strncasecmp(tmp_ptr, "mbit", 4) == 0)
-			bw_unit_type = BATADV_BW_UNIT_MBIT;
-
-		if (strncasecmp(tmp_ptr, "kbit", 4) == 0 ||
-		    bw_unit_type == BATADV_BW_UNIT_MBIT)
-			*tmp_ptr = '\0';
-	}
-
-	ret = kstrtou64(buff, 10, &lthroughput);
-	if (ret) {
-		batadv_err(net_dev,
-			   "Invalid throughput speed for %s: %s\n",
-			   description, buff);
-		return false;
-	}
-
-	switch (bw_unit_type) {
-	case BATADV_BW_UNIT_MBIT:
-		/* prevent overflow */
-		if (U64_MAX / 10 < lthroughput) {
-			batadv_err(net_dev,
-				   "Throughput speed for %s too large: %s\n",
-				   description, buff);
-			return false;
-		}
-
-		lthroughput *= 10;
-		break;
-	case BATADV_BW_UNIT_KBIT:
-	default:
-		lthroughput = div_u64(lthroughput, 100);
-		break;
-	}
-
-	if (lthroughput > U32_MAX) {
-		batadv_err(net_dev,
-			   "Throughput speed for %s too large: %s\n",
-			   description, buff);
-		return false;
-	}
-
-	*throughput = lthroughput;
-
-	return true;
-}
-
 /**
  * batadv_gw_tvlv_container_update() - update the gw tvlv container after
  *  gateway setting change
diff --git a/net/batman-adv/gateway_common.h b/net/batman-adv/gateway_common.h
index cb2e72d7..5d097d6a 100644
--- a/net/batman-adv/gateway_common.h
+++ b/net/batman-adv/gateway_common.h
@@ -9,9 +9,6 @@
 
 #include "main.h"
 
-#include <linux/netdevice.h>
-#include <linux/types.h>
-
 /**
  * enum batadv_bandwidth_units - bandwidth unit types
  */
@@ -30,7 +27,5 @@ enum batadv_bandwidth_units {
 void batadv_gw_tvlv_container_update(struct batadv_priv *bat_priv);
 void batadv_gw_init(struct batadv_priv *bat_priv);
 void batadv_gw_free(struct batadv_priv *bat_priv);
-bool batadv_parse_throughput(struct net_device *net_dev, char *buff,
-			     const char *description, u32 *throughput);
 
 #endif /* _NET_BATMAN_ADV_GATEWAY_COMMON_H_ */
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 09b76b0f..4ddcc21b 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -548,15 +548,12 @@ static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
 		 * algorithm in use implements the GW API
 		 */
 
-		u32 sel_class_max = 0xffffffffu;
+		u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max;
 		u32 sel_class;
 
 		attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
 		sel_class = nla_get_u32(attr);
 
-		if (!bat_priv->algo_ops->gw.store_sel_class)
-			sel_class_max = BATADV_TQ_MAX_VALUE;
-
 		if (sel_class >= 1 && sel_class <= sel_class_max) {
 			atomic_set(&bat_priv->gw.sel_class, sel_class);
 			batadv_gw_reselect(bat_priv);
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index cf1a0eaf..17d5ea1d 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -2197,11 +2197,10 @@ struct batadv_algo_gw_ops {
 	void (*init_sel_class)(struct batadv_priv *bat_priv);
 
 	/**
-	 * @store_sel_class: parse and stores a new GW selection class
-	 *  (optional)
+	 * @sel_class_max: maximum allowed GW selection class
 	 */
-	ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff,
-				   size_t count);
+	u32 sel_class_max;
+
 	/**
 	 * @get_best_gw_node: select the best GW from the list of available
 	 *  nodes (optional)

-- 
2.39.2