| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 2 Jul 2013 10:55:31 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, dborkman@...hat.com
Subject: [patch net-next v2] nlmon: use standard rtnetlink link api for add/del devices
It is not nice when netdev is created right after module load and with
some implicit name. So rather change nlmon to use standard rtnl link API.
Signed-off-by: Jiri Pirko <jiri@...nulli.us>
---
v1->v2: added forgotten nt.dev initialization
drivers/net/nlmon.c | 49 ++++++++++++++++++++++++++++---------------------
1 file changed, 28 insertions(+), 21 deletions(-)
diff --git a/drivers/net/nlmon.c b/drivers/net/nlmon.c
index a0baf56..b57ce5f 100644
--- a/drivers/net/nlmon.c
+++ b/drivers/net/nlmon.c
@@ -4,6 +4,7 @@
#include <linux/netlink.h>
#include <net/net_namespace.h>
#include <linux/if_arp.h>
+#include <net/rtnetlink.h>
struct pcpu_lstats {
u64 packets;
@@ -56,16 +57,24 @@ static void nlmon_dev_uninit(struct net_device *dev)
free_percpu(dev->lstats);
}
-static struct netlink_tap nlmon_tap;
+struct nlmon {
+ struct netlink_tap nt;
+};
static int nlmon_open(struct net_device *dev)
{
- return netlink_add_tap(&nlmon_tap);
+ struct nlmon *nlmon = netdev_priv(dev);
+
+ nlmon->nt.dev = dev;
+ nlmon->nt.module = THIS_MODULE;
+ return netlink_add_tap(&nlmon->nt);
}
static int nlmon_close(struct net_device *dev)
{
- return netlink_remove_tap(&nlmon_tap);
+ struct nlmon *nlmon = netdev_priv(dev);
+
+ return netlink_remove_tap(&nlmon->nt);
}
static struct rtnl_link_stats64 *
@@ -119,10 +128,6 @@ static const struct net_device_ops nlmon_ops = {
.ndo_change_mtu = nlmon_change_mtu,
};
-static struct netlink_tap nlmon_tap __read_mostly = {
- .module = THIS_MODULE,
-};
-
static void nlmon_setup(struct net_device *dev)
{
dev->type = ARPHRD_NETLINK;
@@ -142,27 +147,28 @@ static void nlmon_setup(struct net_device *dev)
dev->mtu = NLMSG_GOODSIZE;
}
-static __init int nlmon_register(void)
+static int nlmon_validate(struct nlattr *tb[], struct nlattr *data[])
{
- int err;
- struct net_device *nldev;
-
- nldev = nlmon_tap.dev = alloc_netdev(0, "netlink", nlmon_setup);
- if (unlikely(nldev == NULL))
- return -ENOMEM;
+ if (tb[IFLA_ADDRESS])
+ return -EINVAL;
+ return 0;
+}
- err = register_netdev(nldev);
- if (unlikely(err))
- free_netdev(nldev);
+static struct rtnl_link_ops nlmon_link_ops __read_mostly = {
+ .kind = "nlmon",
+ .priv_size = sizeof(struct nlmon),
+ .setup = nlmon_setup,
+ .validate = nlmon_validate,
+};
- return err;
+static __init int nlmon_register(void)
+{
+ return rtnl_link_register(&nlmon_link_ops);
}
static __exit void nlmon_unregister(void)
{
- struct net_device *nldev = nlmon_tap.dev;
-
- unregister_netdev(nldev);
+ rtnl_link_unregister(&nlmon_link_ops);
}
module_init(nlmon_register);
@@ -172,3 +178,4 @@ MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Daniel Borkmann <dborkman@...hat.com>");
MODULE_AUTHOR("Mathieu Geli <geli@...eirb.fr>");
MODULE_DESCRIPTION("Netlink monitoring device");
+MODULE_ALIAS_RTNL_LINK("nlmon");
--
1.8.1.4
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists