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-rw-r--r--include/linux/if_link.h34
-rw-r--r--net/8021q/Makefile2
-rw-r--r--net/8021q/vlan.c29
-rw-r--r--net/8021q/vlan.h10
-rw-r--r--net/8021q/vlan_netlink.c236
5 files changed, 300 insertions, 11 deletions
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 3144babd2357..422084d18ce1 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -153,4 +153,38 @@ enum
#define IFLA_INFO_MAX (__IFLA_INFO_MAX - 1)
+/* VLAN section */
+
+enum
+{
+ IFLA_VLAN_UNSPEC,
+ IFLA_VLAN_ID,
+ IFLA_VLAN_FLAGS,
+ IFLA_VLAN_EGRESS_QOS,
+ IFLA_VLAN_INGRESS_QOS,
+ __IFLA_VLAN_MAX,
+};
+
+#define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
+
+struct ifla_vlan_flags {
+ __u32 flags;
+ __u32 mask;
+};
+
+enum
+{
+ IFLA_VLAN_QOS_UNSPEC,
+ IFLA_VLAN_QOS_MAPPING,
+ __IFLA_VLAN_QOS_MAX
+};
+
+#define IFLA_VLAN_QOS_MAX (__IFLA_VLAN_QOS_MAX - 1)
+
+struct ifla_vlan_qos_mapping
+{
+ __u32 from;
+ __u32 to;
+};
+
#endif /* _LINUX_IF_LINK_H */
diff --git a/net/8021q/Makefile b/net/8021q/Makefile
index 97feb44dbdce..10ca7f486c3a 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 f12f914edf02..e7583eea6fda 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -97,15 +97,22 @@ 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
@@ -136,6 +143,7 @@ static void __exit vlan_cleanup_module(void)
{
int i;
+ vlan_netlink_fini();
vlan_ioctl_set(NULL);
/* Un-register us from receiving netdevice events */
@@ -306,7 +314,7 @@ static int unregister_vlan_dev(struct net_device *real_dev,
return ret;
}
-static int unregister_vlan_device(struct net_device *dev)
+int unregister_vlan_device(struct net_device *dev)
{
int ret;
@@ -361,7 +369,7 @@ 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);
@@ -410,7 +418,7 @@ static void vlan_transfer_operstate(const struct net_device *dev, struct net_dev
}
}
-static int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id)
+int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id)
{
if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
@@ -447,7 +455,7 @@ static int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_
return 0;
}
-static int register_vlan_dev(struct net_device *dev)
+int register_vlan_dev(struct net_device *dev)
{
struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
struct net_device *real_dev = vlan->real_dev;
@@ -567,6 +575,7 @@ static int register_vlan_device(struct net_device *real_dev,
VLAN_DEV_INFO(new_dev)->dent = NULL;
VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
+ new_dev->rtnl_link_ops = &vlan_link_ops;
err = register_vlan_dev(new_dev);
if (err < 0)
goto out_free_newdev;
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index b83739017e9d..fe6bb0f7d275 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -72,4 +72,14 @@ void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
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_real_dev(struct net_device *real_dev, unsigned short vlan_id);
+void vlan_setup(struct net_device *dev);
+int register_vlan_dev(struct net_device *dev);
+int unregister_vlan_device(struct net_device *dev);
+
+int vlan_netlink_init(void);
+void vlan_netlink_fini(void);
+
+extern struct rtnl_link_ops vlan_link_ops;
+
#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 000000000000..844c7e43d0fa
--- /dev/null
+++ b/net/8021q/vlan_netlink.c
@@ -0,0 +1,236 @@
+/*
+ * VLAN netlink control interface
+ *
+ * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#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_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },
+ [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 ifla_vlan_flags *flags;
+ u16 id;
+ int err;
+
+ if (!data)
+ return -EINVAL;
+
+ if (data[IFLA_VLAN_ID]) {
+ id = nla_get_u16(data[IFLA_VLAN_ID]);
+ if (id >= VLAN_VID_MASK)
+ return -ERANGE;
+ }
+ if (data[IFLA_VLAN_FLAGS]) {
+ flags = nla_data(data[IFLA_VLAN_FLAGS]);
+ if ((flags->flags & flags->mask) & ~VLAN_FLAG_REORDER_HDR)
+ 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;
+ return 0;
+}
+
+static int vlan_changelink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct ifla_vlan_flags *flags;
+ struct ifla_vlan_qos_mapping *m;
+ struct nlattr *attr;
+ int rem;
+
+ if (data[IFLA_VLAN_FLAGS]) {
+ flags = nla_data(data[IFLA_VLAN_FLAGS]);
+ vlan->flags = (vlan->flags & ~flags->mask) |
+ (flags->flags & flags->mask);
+ }
+ 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 0;
+}
+
+static int vlan_newlink(struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct net_device *real_dev;
+ int err;
+
+ if (!data[IFLA_VLAN_ID])
+ return -EINVAL;
+
+ if (!tb[IFLA_LINK])
+ return -EINVAL;
+ real_dev = __dev_get_by_index(nla_get_u32(tb[IFLA_LINK]));
+ if (!real_dev)
+ return -ENODEV;
+
+ vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
+ vlan->real_dev = real_dev;
+ vlan->flags = VLAN_FLAG_REORDER_HDR;
+
+ err = vlan_check_real_dev(real_dev, vlan->vlan_id);
+ if (err < 0)
+ return err;
+
+ if (!tb[IFLA_MTU])
+ dev->mtu = real_dev->mtu;
+ else if (dev->mtu > real_dev->mtu)
+ return -EINVAL;
+
+ err = vlan_changelink(dev, tb, data);
+ if (err < 0)
+ return err;
+
+ return register_vlan_dev(dev);
+}
+
+static void vlan_dellink(struct net_device *dev)
+{
+ unregister_vlan_device(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(const 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, const struct net_device *dev)
+{
+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct vlan_priority_tci_mapping *pm;
+ struct ifla_vlan_flags f;
+ 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->flags) {
+ f.flags = vlan->flags;
+ f.mask = ~0;
+ NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
+ }
+ 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;
+}
+
+struct rtnl_link_ops vlan_link_ops __read_mostly = {
+ .kind = "vlan",
+ .maxtype = IFLA_VLAN_MAX,
+ .policy = vlan_policy,
+ .priv_size = sizeof(struct vlan_dev_info),
+ .setup = vlan_setup,
+ .validate = vlan_validate,
+ .newlink = vlan_newlink,
+ .changelink = vlan_changelink,
+ .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("vlan");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 10:10:51 +0000