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Date: Tue, 5 Jun 2007 16:23:42 +0200 (MEST)
From: Patrick McHardy <kaber@...sh.net>
To: netdev@...r.kernel.org
Cc: Patrick McHardy <kaber@...sh.net>
Subject: [RFC VLAN 08/08]: Use rtnl_link API
[VLAN]: Use rtnl_link API
---
commit 6e11b791711627a87abfe1bd8c21a4f4d369bca6
tree 5fbe3c1ff51dd87c80748b2793878c076ed57ed7
parent fba4579d0d3c365f1ff5473e905dac68c5ec62f3
author Patrick McHardy <kaber@...sh.net> Tue, 29 May 2007 17:53:18 +0200
committer Patrick McHardy <kaber@...sh.net> Tue, 29 May 2007 17:53:18 +0200
include/linux/if_link.h | 25 ++++++
include/linux/rtnetlink.h | 3 -
net/8021q/Makefile | 2
net/8021q/vlan.c | 33 +++++---
net/8021q/vlan.h | 5 +
net/8021q/vlan_netlink.c | 194 +++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 248 insertions(+), 14 deletions(-)
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 936bd1b..b77e5a8 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -154,4 +154,29 @@ enum
#define IFLA_INFO_MAX (__IFLA_INFO_MAX - 1)
+enum
+{
+ IFLA_VLAN_UNSPEC,
+ IFLA_VLAN_ID,
+ IFLA_VLAN_EGRESS_QOS,
+ IFLA_VLAN_INGRESS_QOS,
+ __IFLA_VLAN_MAX,
+};
+
+#define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
+
+struct ifla_vlan_qos_mapping
+{
+ __u32 from;
+ __u32 to;
+};
+
+enum {
+ IFLA_VLAN_QOS_UNSPEC,
+ IFLA_VLAN_QOS_MAPPING,
+ __IFLA_VLAN_QOS_MAX
+};
+
+#define IFLA_VLAN_QOS_MAX (__IFLA_VLAN_QOS_MAX - 1)
+
#endif /* _LINUX_IF_LINK_H */
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 6f228c7..dcc0202 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -409,7 +409,8 @@ struct rtgenmsg
#define RTNL_LF_DUMMY 128
#define RTNL_LF_IFB 129
-#define RTNL_LF_MAX 129
+#define RTNL_LF_VLAN 130
+#define RTNL_LF_MAX 130
#define RTNL_LF_OFFSET (RTNL_LF_COMPAT_END - RTNL_LF_COMPAT_MAX)
#define RTNL_LF_NUM (NPROTO + RTNL_LF_MAX - RTNL_LF_COMPAT_END)
diff --git a/net/8021q/Makefile b/net/8021q/Makefile
index 97feb44..10ca7f4 100644
--- a/net/8021q/Makefile
+++ b/net/8021q/Makefile
@@ -4,7 +4,7 @@
obj-$(CONFIG_VLAN_8021Q) += 8021q.o
-8021q-objs := vlan.o vlan_dev.o
+8021q-objs := vlan.o vlan_dev.o vlan_netlink.o
ifeq ($(CONFIG_PROC_FS),y)
8021q-objs += vlanproc.o
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index e5405cf..475ca57 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -51,7 +51,6 @@ static char vlan_buggyright[] = "David S. Miller <davem@...hat.com>";
static int vlan_device_event(struct notifier_block *, unsigned long, void *);
static int vlan_ioctl_handler(void __user *);
-static int unregister_vlan_dev(struct net_device *);
static struct notifier_block vlan_notifier_block = {
.notifier_call = vlan_device_event,
@@ -97,15 +96,22 @@ static int __init vlan_proto_init(void)
/* Register us to receive netdevice events */
err = register_netdevice_notifier(&vlan_notifier_block);
- if (err < 0) {
- dev_remove_pack(&vlan_packet_type);
- vlan_proc_cleanup();
- return err;
- }
+ if (err < 0)
+ goto err1;
- vlan_ioctl_set(vlan_ioctl_handler);
+ err = vlan_netlink_init();
+ if (err < 0)
+ goto err2;
+ vlan_ioctl_set(vlan_ioctl_handler);
return 0;
+
+err2:
+ unregister_netdevice_notifier(&vlan_notifier_block);
+err1:
+ vlan_proc_cleanup();
+ dev_remove_pack(&vlan_packet_type);
+ return err;
}
/* Cleanup all vlan devices
@@ -119,7 +125,7 @@ static void __exit vlan_cleanup_devices(void)
rtnl_lock();
for_each_netdev_safe(dev, nxt) {
if (dev->priv_flags & IFF_802_1Q_VLAN)
- unregister_vlan_dev(dev);
+ vlan_unregister_dev(dev);
}
rtnl_unlock();
}
@@ -132,6 +138,7 @@ static void __exit vlan_cleanup_module(void)
{
int i;
+ vlan_netlink_fini();
vlan_ioctl_set(NULL);
/* Un-register us from receiving netdevice events */
@@ -230,7 +237,7 @@ static void vlan_rcu_free(struct rcu_head *rcu)
* last one on the underlying device and the group was destroyed,
* 0 otherwise.
*/
-static int unregister_vlan_dev(struct net_device *dev)
+int vlan_unregister_dev(struct net_device *dev)
{
struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;
unsigned short vlan_id = VLAN_DEV_INFO(dev)->vlan_id;
@@ -331,7 +338,7 @@ static int vlan_dev_init(struct net_device *dev)
return 0;
}
-static void vlan_setup(struct net_device *new_dev)
+void vlan_setup(struct net_device *new_dev)
{
SET_MODULE_OWNER(new_dev);
@@ -358,6 +365,8 @@ static void vlan_setup(struct net_device *new_dev)
new_dev->set_multicast_list = vlan_dev_set_multicast_list;
new_dev->destructor = free_netdev;
new_dev->do_ioctl = vlan_dev_ioctl;
+
+ new_dev->link_family = RTNL_LF_VLAN;
}
static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev)
@@ -595,7 +604,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
if (!vlandev)
continue;
- if (unregister_vlan_dev(vlandev))
+ if (vlan_unregister_dev(vlandev))
/* Group was destroyed? */
break;
}
@@ -706,7 +715,7 @@ static int vlan_ioctl_handler(void __user *arg)
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
- err = unregister_vlan_dev(dev);
+ err = vlan_unregister_dev(dev);
break;
case GET_VLAN_INGRESS_PRIORITY_CMD:
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 47f0c53..351bd55 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -73,7 +73,12 @@ void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result);
void vlan_dev_set_multicast_list(struct net_device *vlan_dev);
int vlan_check_device(struct net_device *dev, unsigned short vlan_id);
+int vlan_check_device(struct net_device *dev, unsigned short vlan_id);
+void vlan_setup(struct net_device *dev);
int vlan_register_dev(struct net_device *dev);
int vlan_unregister_dev(struct net_device *dev);
+int vlan_netlink_init(void);
+void vlan_netlink_fini(void);
+
#endif /* !(__BEN_VLAN_802_1Q_INC__) */
diff --git a/net/8021q/vlan_netlink.c b/net/8021q/vlan_netlink.c
new file mode 100644
index 0000000..32fb195
--- /dev/null
+++ b/net/8021q/vlan_netlink.c
@@ -0,0 +1,194 @@
+/*
+ * VLAN netlink control interface
+ *
+ * Copyright (c) 2007 Patrick McHardy <kaber@...sh.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_vlan.h>
+#include <net/netlink.h>
+#include <net/rtnetlink.h>
+#include "vlan.h"
+
+
+static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
+ [IFLA_VLAN_ID] = { .type = NLA_U16 },
+ [IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },
+ [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
+};
+
+static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
+ [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
+};
+
+
+static inline int vlan_validate_qos_map(struct nlattr *attr)
+{
+ if (!attr)
+ return 0;
+ return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
+}
+
+static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ struct net_device *dev;
+ u16 id;
+ int err;
+
+ if (!tb[IFLA_LINK])
+ return -EINVAL;
+
+ if (!data || !data[IFLA_VLAN_ID])
+ return -EINVAL;
+
+ id = nla_get_u16(data[IFLA_VLAN_ID]);
+ if (id >= VLAN_VID_MASK)
+ return -EINVAL;
+
+ err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
+ if (err < 0)
+ return err;
+
+ err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
+ if (err < 0)
+ return err;
+
+ dev = __dev_get_by_index(nla_get_u32(tb[IFLA_LINK]));
+ if (!dev)
+ return -ENODEV;
+
+ return vlan_check_device(dev, id);
+}
+
+static int vlan_newlink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct ifla_vlan_qos_mapping *m;
+ struct nlattr *attr;
+ int rem;
+
+ vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
+ vlan->real_dev = __dev_get_by_index(nla_get_u32(tb[IFLA_LINK]));
+
+ if (data[IFLA_VLAN_INGRESS_QOS]) {
+ nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
+ m = nla_data(attr);
+ vlan_dev_set_ingress_priority(dev, m->to, m->from);
+ }
+ }
+ if (data[IFLA_VLAN_EGRESS_QOS]) {
+ nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
+ m = nla_data(attr);
+ vlan_dev_set_egress_priority(dev, m->from, m->to);
+ }
+ }
+ return vlan_register_dev(dev);
+}
+
+static void vlan_dellink(struct net_device *dev)
+{
+ vlan_unregister_dev(dev);
+}
+
+static inline size_t vlan_qos_map_size(unsigned int n)
+{
+ if (n == 0)
+ return 0;
+ /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
+ return nla_total_size(sizeof(struct nlattr)) +
+ nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
+}
+
+static size_t vlan_get_size(struct net_device *dev)
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+
+ return nla_total_size(2) + /* IFLA_VLAN_ID */
+ vlan_qos_map_size(vlan->nr_ingress_mappings) +
+ vlan_qos_map_size(vlan->nr_egress_mappings);
+}
+
+static int vlan_fill_info(struct sk_buff *skb, struct net_device *dev)
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct vlan_priority_tci_mapping *pm;
+ struct ifla_vlan_qos_mapping m;
+ struct nlattr *nest;
+ unsigned int i;
+
+ NLA_PUT_U16(skb, IFLA_VLAN_ID, VLAN_DEV_INFO(dev)->vlan_id);
+
+ if (vlan->nr_ingress_mappings) {
+ nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
+ if (nest == NULL)
+ goto nla_put_failure;
+
+ for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
+ if (!vlan->ingress_priority_map[i])
+ continue;
+
+ m.from = i;
+ m.to = vlan->ingress_priority_map[i];
+ NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
+ sizeof(m), &m);
+ }
+ nla_nest_end(skb, nest);
+ }
+
+ if (vlan->nr_egress_mappings) {
+ nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
+ if (nest == NULL)
+ goto nla_put_failure;
+
+ for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
+ for (pm = vlan->egress_priority_map[i]; pm;
+ pm = pm->next) {
+ if (!pm->vlan_qos)
+ continue;
+
+ m.from = pm->priority;
+ m.to = (pm->vlan_qos >> 13) & 0x7;
+ NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
+ sizeof(m), &m);
+ }
+ }
+ nla_nest_end(skb, nest);
+ }
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static const struct rtnl_link_ops vlan_link_ops = {
+ .name = "vlan",
+ .family = RTNL_LF_VLAN,
+ .maxtype = IFLA_VLAN_MAX,
+ .policy = vlan_policy,
+ .dev_priv_size = sizeof(struct vlan_dev_info),
+ .dev_setup = vlan_setup,
+ .validate = vlan_validate,
+ .newlink = vlan_newlink,
+ .dellink = vlan_dellink,
+ .get_size = vlan_get_size,
+ .fill_info = vlan_fill_info,
+};
+
+int __init vlan_netlink_init(void)
+{
+ return rtnl_link_register(&vlan_link_ops);
+}
+
+void __exit vlan_netlink_fini(void)
+{
+ rtnl_link_unregister(&vlan_link_ops);
+}
+
+MODULE_ALIAS_RTNL_LINK_FAMILY("vlan", RTNL_LF_VLAN);
-
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