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authorSven Eckelmann <sven@narfation.org>2021-06-02 00:50:35 +0300
committerSimon Wunderlich <sw@simonwunderlich.de>2021-06-02 23:25:45 +0300
commitfa205602d46e0b66c0c90672bce8b36e5de449df (patch)
tree6d788897d8f118e1f52ba53d67d2a57d8166b544 /net/batman-adv
parentbf6b260b8a9654db99761cde74c6b16356b9b441 (diff)
downloadlinux-fa205602d46e0b66c0c90672bce8b36e5de449df.tar.xz
batman-adv: Avoid name based attaching of hard interfaces
The sysfs code for the batman-adv/mesh_iface file was receiving a string of the batadv interface. This interface name was then provided to the code which shared sysfs+rtnetlink code for attaching an hard-interface to an batadv interface. The rtnetlink code was also using the (extracted) interface name from the ndo_add_slave callback to increase the shared code - even when it would have been more efficient to use the provided net_device object directly instead of searching it again (based on its name) in batadv_hardif_enable_interface. But this indirect handling is no longer necessary because the sysfs code was dropped. There is now only a single code path which is using batadv_hardif_enable_interface. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/hard-interface.c14
-rw-r--r--net/batman-adv/hard-interface.h3
-rw-r--r--net/batman-adv/soft-interface.c3
3 files changed, 6 insertions, 14 deletions
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index a638f35598f0..81d201cc343d 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -705,16 +705,15 @@ static int batadv_master_del_slave(struct batadv_hard_iface *slave,
/**
* batadv_hardif_enable_interface() - Enslave hard interface to soft interface
* @hard_iface: hard interface to add to soft interface
- * @net: the applicable net namespace
- * @iface_name: name of the soft interface
+ * @soft_iface: netdev struct of the mesh interface
*
* Return: 0 on success or negative error number in case of failure
*/
int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
- struct net *net, const char *iface_name)
+ struct net_device *soft_iface)
{
struct batadv_priv *bat_priv;
- struct net_device *soft_iface, *master;
+ struct net_device *master;
__be16 ethertype = htons(ETH_P_BATMAN);
int max_header_len = batadv_max_header_len();
int ret;
@@ -724,11 +723,7 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
kref_get(&hard_iface->refcount);
- soft_iface = dev_get_by_name(net, iface_name);
- if (!soft_iface) {
- ret = -EINVAL;
- goto err;
- }
+ dev_hold(soft_iface);
if (!batadv_softif_is_valid(soft_iface)) {
pr_err("Can't create batman mesh interface %s: already exists as regular interface\n",
@@ -802,7 +797,6 @@ err_upper:
err_dev:
hard_iface->soft_iface = NULL;
dev_put(soft_iface);
-err:
batadv_hardif_put(hard_iface);
return ret;
}
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h
index 83d11b46a9d8..8cb2a1f10080 100644
--- a/net/batman-adv/hard-interface.h
+++ b/net/batman-adv/hard-interface.h
@@ -16,7 +16,6 @@
#include <linux/rcupdate.h>
#include <linux/stddef.h>
#include <linux/types.h>
-#include <net/net_namespace.h>
/**
* enum batadv_hard_if_state - State of a hard interface
@@ -75,7 +74,7 @@ bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface);
struct batadv_hard_iface*
batadv_hardif_get_by_netdev(const struct net_device *net_dev);
int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
- struct net *net, const char *iface_name);
+ struct net_device *soft_iface);
void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface);
int batadv_hardif_min_mtu(struct net_device *soft_iface);
void batadv_update_min_mtu(struct net_device *soft_iface);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 0c5b34251a6d..ae368a42a4ad 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -842,14 +842,13 @@ static int batadv_softif_slave_add(struct net_device *dev,
struct netlink_ext_ack *extack)
{
struct batadv_hard_iface *hard_iface;
- struct net *net = dev_net(dev);
int ret = -EINVAL;
hard_iface = batadv_hardif_get_by_netdev(slave_dev);
if (!hard_iface || hard_iface->soft_iface)
goto out;
- ret = batadv_hardif_enable_interface(hard_iface, net, dev->name);
+ ret = batadv_hardif_enable_interface(hard_iface, dev);
out:
if (hard_iface)