From 07b5b17e157b7018d0ca40ca0d1581a23096fb45 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Wed, 13 Jun 2007 12:07:54 -0700 Subject: [PATCH] [VLAN]: Use rtnl_link API Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- include/linux/if_link.h | 34 ++++++ net/8021q/Makefile | 2 +- net/8021q/vlan.c | 29 +++-- net/8021q/vlan.h | 10 ++ net/8021q/vlan_netlink.c | 236 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 300 insertions(+), 11 deletions(-) create mode 100644 net/8021q/vlan_netlink.c diff --git a/include/linux/if_link.h b/include/linux/if_link.h index 3144babd23..422084d18c 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 97feb44dbd..10ca7f486c 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 f12f914edf..e7583eea6f 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 b83739017e..fe6bb0f7d2 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 0000000000..844c7e43d0 --- /dev/null +++ b/net/8021q/vlan_netlink.c @@ -0,0 +1,236 @@ +/* + * VLAN netlink control interface + * + * Copyright (c) 2007 Patrick McHardy + * + * 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 +#include +#include +#include +#include +#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"); -- 2.39.5